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Dicerna Pharmaceuticals

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FY2019 Annual Report · Dicerna Pharmaceuticals
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM 10-K

x

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                to                
Commission File Number: 001-36281

For the fiscal year ended December 31, 2019
or

DICERNA PHARMACEUTICALS, INC.

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of
incorporation or organization)

20-5993609

(IRS Employer
Identification No.)

33 Hayden Avenue, Lexington, MA 02421
(Address of principal executive offices and zip code)
(617) 621-8097
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act: 

Title of Each Class

Common Stock, $0.0001 Par Value

Trading Symbol(s)

DRNA

Name of Each Exchange on Which Registered

The Nasdaq Global Select Market

Securities registered pursuant to Section 12(g) of the Act:
None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  x    No  ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.    Yes  ☐    No  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months
(or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days)    Yes  x    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this
chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  x    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See
the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer

Non-accelerated filer

x
☐  

Accelerated filer

Smaller reporting company

Emerging growth company

☐

x

☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting
standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act)    Yes  ☐    No  x

The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant on June 30, 2019 was approximately $919.3 million based on the last reported sale of
the registrant’s common stock on The Nasdaq Global Select Market on June 28, 2019 of $15.75 per share.

As of February 24, 2020, there were 73,750,617 shares of the registrant’s common stock, par value $0.0001 per share, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement for its 2020 Annual Meeting of Stockholders are incorporated by reference into Part III hereof. Such proxy statement will be filed
with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

 
 
 
 
 
 
 
 
 
 
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Item 1.

Business

Item 1A.

Risk Factors

Item 1B.

Unresolved Staff Comments

Properties

Legal Proceedings

Mine Safety Disclosures

Item 2.

Item 3.

Item 4.

Item 5.

Item 6.

Item 7.

DICERNA PHARMACEUTICALS, INC.
2019 ANNUAL REPORT ON FORM 10-K
TABLE OF CONTENTS

PART I

PART II

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

Selected Financial Data

Management’s Discussion and Analysis of Financial Condition and Results of Operations

Item 7A.

Quantitative and Qualitative Disclosures About Market Risk

Item 8.

Item 9.

Financial Statements and Supplementary Data

Changes in and Disagreements With Accountants on Accounting and Financial Disclosure

Item 9A.

Controls and Procedures

Item 9B.

Other Information

Directors, Executive Officers and Corporate Governance

Executive Compensation

PART III

Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Certain Relationships and Related Transactions, and Director Independence

Principal Accountant Fees and Services

Item 10.

Item 11.

Item 12.

Item 13.

Item 14.

Item 15.

Item 16.

SIGNATURES

Exhibits and Financial Statement Schedules

Form 10-K Summary

PART IV

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as
amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements other than
statements of historical fact are “forward-looking statements” for purposes of this Annual Report on Form 10-K. In some cases, you can identify forward-
looking statements by terminology such as “may,” “could,” “will,” “would,” “should,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “intend,”
“predict,” “seek,” “contemplate,” “project,” “continue,” “potential,” “ongoing,” “goal,” or the negative of these terms or other comparable terminology. These
forward-looking statements include, but are not limited to, statements about:

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the initiation, timing, progress, and results of our research and development programs, preclinical studies, any clinical trials and Investigational
New Drug Applications, Clinical Trial Applications, New Drug Applications and other regulatory submissions;

our alignment with the U.S. Food and Drug Administration on regulatory approval requirements;

our ability to identify and develop product candidates for the treatment of additional disease indications;

our or a collaborator’s ability to obtain and maintain regulatory approval of any of our product candidates;

the rate and degree of market acceptance of any approved product candidates;

the commercialization of any approved product candidates;

our ability to establish and maintain existing and additional collaborations and retain commercial rights for our product candidates in the
collaborations;

the implementation of our business model and strategic plans for our business, technologies, and product candidates;

how long we expect to maintain liquidity to fund our planned level of operations and our ability to obtain additional funds for our operations;

our estimates of our expenses, ongoing losses, future revenue, and capital requirements;

our ability to obtain and maintain intellectual property protection for our technologies and product candidates and our ability to operate our
business without infringing the intellectual property rights of others;

our reliance on third parties to conduct our preclinical studies or any clinical trials;

our reliance on third-party suppliers and manufacturers to supply the materials and components for, manufacture, and research and develop our
preclinical and clinical trial drug supplies;

our ability to attract and retain qualified key management and technical personnel;

our dependence on our existing collaborators, Novo Nordisk A/S, F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc., Eli Lilly and
Company, Alexion Pharmaceuticals, Inc., and Boehringer Ingelheim International GmbH, for developing, obtaining regulatory approval for, and
commercializing product candidates in the collaborations;

our receipt and timing of any potential milestone payments or royalties under our existing research collaborations and license agreements or any
future arrangements with our existing collaboration partners or any other collaborators;

our financial performance; and

developments relating to our competitors or our industry.

These statements relate to future events or to our future financial performance and involve known and unknown risks, uncertainties, and other factors

that may cause our actual results, performance, or achievements to be materially different from any future results, performance, or achievements expressed or
implied by these forward-looking statements. Factors that may cause actual results to differ materially from current expectations include, among other things,
those set forth in Part I, Item 1A – “Risk Factors” below and for the reasons described elsewhere in this Annual Report on Form 10-K. Any forward-looking
statement in this Annual Report on Form 10-K reflects our current view with respect to future events and is subject to these and other risks, uncertainties, and
assumptions relating to our operations, results of operations, industry, and future growth. Given these uncertainties, you should not place undue reliance on
these forward-looking statements. Except as required by law, we assume no obligation to update or revise these forward-looking statements for any reason,
even if new information becomes available in the future.

This Annual Report on Form 10-K also contains estimates, projections, and other information concerning our industry, our business, and the markets
for certain drugs, including data regarding the estimated size of those markets, their projected growth rates, and the incidence of certain medical conditions.
Information that is based on estimates, forecasts, projections, or similar methodologies is inherently subject to uncertainties, and actual events or
circumstances may differ materially from events and

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circumstances reflected in this information. Unless otherwise expressly stated, we obtained these industry, business, market, and other data from reports,
research surveys, studies, and similar data prepared by third parties, industry, medical and general publications, government data, and similar sources. In some
cases, we do not expressly refer to the sources from which these data are derived.

Except where the context otherwise requires, in this Annual Report on Form 10-K, “we,” “us,” “our,” “Dicerna,” and the “Company” refer to Dicerna

Pharmaceuticals, Inc. and, where appropriate, its consolidated subsidiaries.

Trademarks

This Annual Report on Form 10-K includes trademarks, service marks, and trade names owned by us or other companies. All trademarks, service
marks, and trade names included in this Annual Report on Form 10-K are the property of their respective owners. Solely for convenience, the trademarks and
trade names in this report may be referred to without the ® and ™ symbols, but such references should not be construed as any indicator that their respective
owners will not assert, to the fullest extent under applicable law, their rights thereto.

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ITEM 1.

BUSINESS

Overview

PART I

Dicerna™ Pharmaceuticals, Inc. (“we,” “us,” “our,” the “Company,” or “Dicerna”) is a biopharmaceutical company using ribonucleic acid (“RNA”)
interference (“RNAi”) to develop medicines that silence genes that cause or contribute to disease. The Company’s proprietary GalXC™ technology is being
applied to develop what we believe will be potent, selective, and safe RNAi therapies to treat diseases involving the liver, including rare diseases, chronic
liver diseases, cardiometabolic diseases, and viral infectious diseases. As we further enhance our GalXC technology, we aim to extend our focus beyond the
liver to include central nervous system (“CNS”) diseases and diseases involving other bodily tissues. Dicerna aims to treat a broad range of diseases by
addressing the underlying causes of illness, focusing on target genes where connections between gene and disease are well understood and documented.
Dicerna intends to discover, develop, and commercialize novel therapeutics either on its own or in collaboration with pharmaceutical partners. Dicerna has
strategic collaborations with Novo Nordisk A/S (“Novo”), F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (together, “Roche”), Eli Lilly and
Company (“Lilly”), Alexion Pharmaceuticals, Inc. (together with its affiliates, “Alexion”), and Boehringer Ingelheim International GmbH (“BI”).

All of our GalXC drug discovery and development efforts are based on the therapeutic modality of RNAi, a highly potent and specific mechanism for
silencing the activity of a targeted gene. In this naturally occurring biological process, double-stranded RNA molecules induce the enzymatic destruction of
the messenger ribonucleic acid (“mRNA”) of a target gene that contains sequences that are complementary to one strand of the therapeutic double-stranded
RNA molecule. Our approach is to design proprietary double-stranded RNA molecules that have the potential to engage the enzyme Dicer and initiate an
RNAi process to silence a specific target gene. Our GalXC RNAi platform utilizes a proprietary structure of double-stranded RNA molecules. For our current
clinical programs, our GalXC RNAi platform has been configured for subcutaneous delivery to the liver. Due to the enzymatic nature of RNAi, a single
GalXC molecule incorporated into the RNAi machinery can destroy hundreds or thousands of mRNAs from the targeted gene.

Strategy

We are committed to delivering transformative therapies based on our GalXC RNAi platform to patients with serious diseases, and currently our focus

includes rare diseases, chronic liver diseases, cardiometabolic diseases, and viral infectious diseases. We and our collaborators have qualified dozens of
disease-associated genes with clinical indications, in which an RNAi-based inhibitor may provide substantial benefit to patients.

The key elements of our strategy are as follows:

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Create new programs in indication areas with high unmet medical need. We intend to continue to use our proprietary GalXC RNAi
technology platform to create new, high-value pharmaceutical programs. Our areas of primary focus are: (1) rare inherited diseases involving
genes in the liver; (2) other therapeutic areas involving the expression of therapeutic gene targets in the liver such as chronic liver diseases,
cardiometabolic diseases, and viral infectious diseases; and (3) further leveraging our successes with the GalXC platform to explore therapeutic
gene targets in the CNS and other tissues.

Validate our product candidates and our platform in clinical proof-of-concept studies. On September 5, 2018, we declared attainment of
clinical proof-of-concept for nedosiran (formerly DCR-PHXC, which is in clinical development for primary hyperoxaluria (“PH”) type 1
(“PH1”), PH type 2 (“PH2”), and PH type 3 (“PH3”)) and are currently conducting clinical proof-of-concept studies for our RG6346 (formerly
DCR-HBVS) and DCR-A1AT programs. Based on precedents in the RNAi field, we are optimistic that our preclinical studies, which showed
significant knockdown of target mRNA activity and disease biomarker activity, may translate into beneficial clinical results for current and future
programs.

Retain significant portions of the commercial rights for certain rare disease programs. We seek to retain, subject to the evaluation of
potential licensing opportunities as they may arise, a full or substantial ownership stake and to invest internally in programs for diseases with
focused patient populations, such as certain rare diseases. These certain rare disease programs, which include our nedosiran and DCR-A1AT
programs, represent opportunities that we believe carry a higher probability of success relative to other therapeutic platforms or modalities, with
genetically and molecularly defined disease markers, high unmet medical need, a focused number of centers of excellence to facilitate reaching
these patients, and the potential for more rapid clinical development paths to approval.

Enter into collaborations with pharmaceutical companies either for our GalXC RNAi technology platform or specific indications or
therapeutic areas. For more complex diseases with multiple gene dysfunctions and/or larger patient populations, we plan to pursue
collaborations that can provide the enhanced scale, resources, and commercial infrastructure required to maximize these prospects. Our
collaborations with Roche, Novo, Lilly, Alexion, and BI

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exemplify this element of our strategy. We may establish collaborations with pharmaceutical companies across multiple programs or specific
indication areas, either before or after clinical proof-of-concept, depending on the attractiveness of the opportunities. These collaborations have
the potential to provide us with further validation of our technology platform, funding to advance our proprietary product candidates, or access to
development, manufacturing, and commercial capabilities.

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Expand the reach of GalXC to therapeutic targets beyond the liver. Our research suggests that our GalXC platform, which was originally
developed to target hepatocytes in the liver, may be adaptable to target other diverse tissues, including the CNS. Our collaboration with Lilly
includes joint research involving our proprietary GalXC platform in order to generate new medicines for CNS diseases, such as neurodegenerative
diseases and chronic pain, as well as for non-liver-based cardiometabolic diseases. We are also pursuing research internally to expand the reach of
our GalXC platform to additional non-liver tissues and are increasing our investment in this area.

Leverage the experience and the expertise of our executive management team. To execute on our strategy, we have assembled an executive
management team that has extensive experience in the biopharmaceutical industry. In addition, various members of our management team and our
board of directors have contributed to the progress of pharmaceutical development and commercialization through their substantial involvement
in companies such as Cephalon Inc., Genta Inc., GlaxoSmithKline plc, Shire plc, Pfizer Inc., NPS Pharmaceuticals, Inc., Millennium
Pharmaceuticals, Inc., Takeda Pharmaceutical Company Limited, Biogen, Inc., Sirna Therapeutics, Inc. (“Sirna”), and other companies. Our co-
founder and chief executive officer, Douglas M. Fambrough III, Ph.D., was a lead venture capital investor and board member of Sirna, an early
RNAi company acquired by Merck & Co., Inc. in 2006 for $1.1 billion.

RNAi and Our GalXC Technology Platform

The RNAi Therapeutic Modality

All of our GalXC drug discovery and development efforts are based on the therapeutic modality of RNAi. RNAi therapeutics represent a novel
advance in drug development. Historically, the pharmaceutical industry had developed only small molecules or recombinant proteins to inhibit the activity of
disease-causing proteins. While this approach is effective for many diseases, many proteins cannot be inhibited by either small molecules or recombinant
proteins. Some proteins lack the binding pockets small molecules require for interaction. Other proteins are solely intracellular and therefore inaccessible to
recombinant protein-based therapeutics, which are limited to cell surface and extracellular proteins. The unique advantage of RNAi is that, instead of
targeting proteins, RNAi silences the genes themselves via the targeted destruction of the mRNAs made from the gene. Rather than seeking to inhibit a
protein directly, the RNAi approach is to prevent its creation in the first place.

The GalXC RNAi Technology Platform

Dicerna’s GalXC technology consists of a set of proprietary double-stranded RNA structures capable of inducing RNAi and associated chemical

modifications and additions to these structures that enhance their properties and help confer useful ‘drug-like’ properties. RNAi-inducing RNA structures
consist of two strands of RNA. One of these strands, called the guide strand, is complementary to the mRNA sequence one is seeking to inhibit. The other
strand, called the passenger strand, includes sequences complementary to the guide strand, forming a double-stranded RNA duplex with it. In the case of our
GalXC technology, additional sequences are added to the passenger strand, which help improve the properties of the molecules and can serve as an
attachment point for various chemical additions. We have spent several years optimizing the structure, chemical modifications, and chemical additions in our
GalXC RNAi platform and will continue to do so to create what we believe is an efficient, effective, and well-tolerated pharmaceutical platform to rapidly
identify and develop RNAi therapeutics for delivery to the liver and other tissues.

We believe our GalXC RNAi technology platform provides the following qualities and has advantages compared to other therapeutic modalities:

• Our GalXC molecules have been optimized for use in humans. For therapeutic use in humans, our GalXC molecules are optimized both with
respect to base sequence and chemical modifications to increase stability and mask them from mechanisms that recognize foreign RNA, in order
to avoid inducing immune system stimulation. Our optimization process begins with an analysis of the target gene sequence using our proprietary
GalXC prediction algorithm, which we developed based on the results of testing thousands of sequences for RNAi activity. We select the
sequences with the highest predicted RNAi activity and apply patterns of chemical modifications and additions, including a four-base sequence,
known as a tetraloop, on the passenger strand, which is designed to enhance stability and engineer out immunostimulatory activity.

• Our GalXC RNAi platform enables subcutaneous dosing for delivery to the liver. The GalXC RNAi platform is designed to enable

convenient subcutaneous delivery for our growing pipeline of liver-targeted RNAi programs. Our liver-targeted GalXC molecules are conjugated
on the tetraloop structure to a simple sugar, N-acetyl-D-galactosamine

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(“GalNAc”), that is specifically recognized by a receptor on the surface of hepatocytes. With the liver-targeted GalXC RNAi platform, a full
human dose may be administered via a single subcutaneous injection. After injection, the GalXC molecules enter the bloodstream and are
exposed to the hepatocytes expressing the GalNAc receptor. After binding to the receptor, the GalXC molecules are internalized by the
hepatocyte, ultimately enabling the GalXC molecules to access the RNAi machinery inside the hepatocyte. Our liver-targeted GalXC molecules
routinely achieve high potencies, with EC50 values in the liver (i.e., the amount of material required to silence a target gene by 50 percent)
typically in the 0.1 to 1.0 milligram per kilogram bodyweight (mg/kg) range in in vivo studies in mice. We have routinely generated GalXC
molecules of this potency within 30 days of doing the initial algorithmic gene sequence analysis, which allows us to explore a large number of
potential target genes when selecting programs for ourselves and with our collaborators.

• Our GalXC molecules have a long duration of action. We believe our GalXC RNAi platform allows us to build a broad pipeline of

therapeutics designed to have attractive pharmaceutical properties, including infrequent dosing (e.g., dosing that is on a monthly, quarterly, or an
even less frequent basis) due to a long duration of action and higher potency of RNAi-based gene silencing.

• Our GalXC molecules are highly specific to the gene to which they are targeted. Due to the gene-sequence-based nature of how our GalXC
molecules interact with their gene mRNA targets, facilitated by the RNAi pathway proteins inside the cell, we believe our GalXC molecules
generally lack any direct effect on other gene targets. This specificity compares favorably to many small molecule-based therapeutics, which may
inhibit additional proteins beyond the intended protein target.

• Our GalXC molecules have demonstrated a high therapeutic index. In both preclinical studies and clinical studies, our GalXC molecules

have been shown to be well-tolerated, even at dose levels far exceeding the expected efficacious dose level. We believe this property reduces the
risk that our GalXC molecules may have tolerability liabilities that may preclude further development.

• Our GalXC molecules can be manufactured by existing, standard methods. Our GalXC molecules consist of RNA oligonucleotides, which

can be manufactured with well-understood chemistries on existing readily available equipment. Such equipment is available, at various
manufacturing scales, in multiple contract manufacturing organizations with good manufacturing practice capabilities. We believe this reduces
the risks associated with commercial manufacturing of our candidates.

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Unlike gene therapy and gene editing, our GalXC RNAi therapy is fully reversible.

Development Approach

In choosing which development programs to internally advance, we apply the scientific, clinical, and commercial criteria listed below that we believe

allow us to best leverage our GalXC RNAi platform and maximize value. We believe that our current development programs meet many or all of these
criteria:

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Strength of therapeutic hypothesis. We seek to target genes with a therapeutic intervention that are likely to have substantial benefit for the
patient.

Readily-identified patient population. We seek disease indications where patients can be readily identified by the presence of characteristic
genetic mutations or other readily-accessible disease features. In the case of genetic diseases, these are heritable genetic mutations that can be
identified with available routine genetic tests.

Predictivity of biomarkers for early efficacy assessment. We seek these markers to allow us to determine in early stages of clinical
development whether our GalXC molecules are likely to have the expected biological and clinical effects in patients.

• High unmet medical need. We seek to provide patients with significant benefit and alleviation of disease. The indications we choose to approach

have high unmet medical need, which is intended to enable us to better access patients and qualify for pricing and reimbursement that justify our
development efforts.

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Rapid development path to proof-of-concept or approval. We seek indications with the potential for rapid development to proof-of-concept or
marketing approval in order to reach commercialization expeditiously and to help ensure our ability to finance development of our product
candidates. When appropriate, we will seek breakthrough therapy designation from the United States (“U.S.”) Food and Drug Administration
(“FDA”).

The Dicerna Pipeline

Using our GalXC RNAi technology, and applying the criteria of our development focus, we have created a pipeline of core therapeutic programs for

development by Dicerna. For opportunities that were not selected as a core program opportunity, we have

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sought partners to fund the discovery, and subsequently drive the development of, these non-core opportunities in exchange for upfront payments, milestone
payments, royalties on product sales, and potentially other economic and operational arrangements. Our current collaborations with Novo, Lilly, Alexion, and
BI resulted from this effort. For core programs targeting rare diseases, we intend to develop these programs internally through approval. For core programs
targeting larger populations, we may seek collaborative partners, such as our collaboration with Roche on RG6346, under various economic and operational
arrangements. Together, our core program pipeline and our pipeline of non-core collaborative programs constitute a broad and growing therapeutic pipeline
that we believe may result in multiple valuable approved products based on our GalXC technology.

In addition to the programs listed in our pipeline, we are exploring a variety of potential programs involving gene targets in the liver, CNS, and other

tissues, which we may elevate in the future to be either core programs or non-core collaborative programs. Under our collaborations with Novo, Lilly, and
Roche, our collaborators have rights to nominate additional programs for discovery by Dicerna and subsequent development by the nominating collaborator,
and which will become part of our non-core pipeline.

The tables below set forth the state of development of our various GalXC RNAi platform product candidates as of February 27, 2020.

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Nedosiran for Primary Hyperoxaluria

We are developing our lead GalXC product candidate, nedosiran, for the treatment of PH1, PH2, and PH3. Nedosiran is in the pivotal phase of clinical

development. PH is a family of severe, ultra-rare, genetic liver disorders characterized by the overproduction of oxalate, a highly insoluble metabolic end-
product that is eliminated from the body mainly by the kidneys. In patients with PH, the kidneys are unable to eliminate fully the large amount of oxalate that
is produced. This accumulation of oxalate compromises the renal system, which may result in severe damage to the kidneys and other organs.

PH encompasses three genetically distinct, autosomal-recessive, inborn errors of glyoxylate metabolism characterized by the overproduction of
oxalate. PH1, PH2, and PH3 are each characterized by a specific enzyme deficiency. PH1 is caused by a deficiency of glyoxylate-aminotransferase, PH2 is
caused by a deficiency of glyoxylate reductase/hydroxypyruvate reductase, and PH3 is caused by a deficiency of 4-hydroxy-2-oxoglutarate aldolase. Patients
with PH are predisposed to the development of recurrent urinary tract (urolithiasis) and kidney (nephrolithiasis) stones, composed of calcium oxalate crystals.
Stone formation is accompanied by nephrocalcinosis in some patients with PH1 and PH2. This deposition of calcium oxalate crystals in the renal parenchyma
produces tubular toxicity and renal damage that is compounded by the effects of renal calculi-related obstruction and frequent superimposed infections. Based
on evaluation of genome sequence databases, there may be as many as 16,000 people with PH in the U.S. and major European countries.

Most patients are diagnosed with PH in childhood or early adulthood. At present, no therapies are approved by regulatory authorities for the treatment

of patients with PH. A number of supportive therapies are used in an attempt to mitigate some effects of the disease. Current medical management, before
renal failure develops, is underpinned by hyperhydration recommendations of at least three liters of fluid per day per square meter of body-surface area (5
L/day for a 70-kg adult). These regimens can be problematic in infants and toddlers, necessitating placement of a gastrostomy tube to ensure adequate
nighttime fluid administration. Affected patients are at considerable risk of serious renal complications during periods of increased fluid loss (fever,
diarrhea/vomiting, and urinary tract infections) or when oral hydration is compromised (following surgical procedures). Oral potassium citrate administration
multiple times daily is used to potentially alleviate crystallization and alkalinize the urine. In PH1, between 10-30% of patients are responsive (i.e., greater
than 30% reduction of urinary oxalate) to high daily administration of pyridoxine (vitamin B6), but only rarely do these patients reach normal or near-normal
urinary oxalate levels.

For PH1 and PH2 patients with more advanced disease, dialysis may be used in an attempt to remove stored and concurrent overproduction of oxalate.

In contrast to the typical three times weekly hemodialysis regimens used in other types of renal failure, patients with PH may require hemodialysis six or
seven days per week. This intensive regimen may still not be able to keep up with the endogenous oxalate production. Given the limitations of dialysis and
the inability to impact oxalate overproduction substantially in most patients with PH1, most centers now consider liver transplantation approaches earlier in
the disease course to minimize the risk of irreversible tissue damage. Current treatments may include sequential or combined liver-kidney transplantation. As
with organ transplantation in other diseases, these procedures are associated with significant medical risk and a requirement for long-term treatment with
immunosuppressive drugs that are also associated with significant side effects. We believe this level of unmet need provides a strong rationale for our initial
focus on the treatment of PH.

Our GalXC-containing nedosiran product candidate seeks to block production of the lactate dehydrogenase A enzyme by silencing the LDHA gene. PH

is characterized by overproduction of oxalate in the liver. The last step in the production of oxalate in the liver involves the LDHA gene, making LDHA
silencing a potentially highly promising approach to the treatment of PH1, PH2, and PH3. In preclinical studies of PH1 and PH2 animal models, we have
observed a near-linear correlation between LDHA silencing and oxalate reduction. In addition, LDHA silencing in the liver appears to be a minimal metabolic
intervention, as it does not cause measurable changes to known blood and urinary biomarkers of metabolic activity. There are numerous case reports of LDHA
deficiency naturally occurring in humans, with no reported adverse effects due to deficiency in the liver. For these reasons among others, we believe that
LDHA silencing is an ideal approach to blocking oxalate over-production in PH1, PH2, and PH3.

In May 2018, we received notice from the FDA granting Orphan Drug Designation to nedosiran for the treatment of PH. In August 2018, the European

Medicines Agency (“EMA”)’s Committee for Orphan Medicinal Products (“COMP”) designated nedosiran as an orphan medicinal product for the treatment
of PH in the European Union (“EU”).

As of November 2019, we completed all study participant dosing and follow-up in PHYOX™1, a Phase 1 single-ascending-dose study of nedosiran in

healthy volunteers and study participants with PH1 and PH2. The primary objective of the study was to evaluate the safety, tolerability, pharmacokinetics, and
pharmacodynamics of single-ascending doses of nedosiran. Secondary endpoints included the change in 24-hour urinary oxalate excretion from baseline,
defined as the mean of two 24-hour collections during screening. The trial was divided into two groups:

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Group A was a placebo-controlled, single-blind study and included 25 healthy volunteers at a single site in the United Kingdom with five cohorts
dosed at 0.3, 1.5, 3.0, 6.0, or 12.0 mg/kg of nedosiran or placebo (3:2 randomization).

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Group B was an open-label study and included 18 participants, 15 with PH1 and three with PH2, and included three cohorts of participants dosed at
1.5, 3.0, and 6.0 mg/kg of nedosiran and a fourth cohort with mixed dosing. Group B participants were enrolled among three sites in the European
Union, one in the United Kingdom, and one site in the United States.

Group A dosing was completed in March 2018, and Group B dosing was completed in January 2019. We first reported interim results from the

PHYOX1 trial on September 5, 2018 and subsequently presented updated results at the American Society of Nephrology’s (“ASN”) Kidney Week in San
Diego on October 25, 2018, at the German Society of Pediatric Nephrology 50th Annual Meeting in Cologne, Germany on March 28, 2019, at the Oxalosis
and Hyperoxaluria Foundation International Hyperoxaluria Workshop in Boston, Massachusetts on June 20, 2019, and at the ASN’s Kidney Week Annual
Meeting in Washington, D.C. on November 7, 2019.

With respect to efficacy data in PHYOX1, as of September 2019, nedosiran was associated with normalization or near-normalization of urinary oxalate

levels in 14 of 18 adult patients with PH1 and PH2 following single-dose administration.

The PHYOX1 investigators also reported that the three participants with PH2 (one of whom received a single 1.5 mg/kg dose of nedosiran; the other
two received a 3.0 mg/kg dose) achieved a mean maximal reduction of 24-hour urinary oxalate of 49% (range: 39% to 66%) with one participant reaching
normalization and another participant reaching near-normalization at one or more post-dose time points. The PH2 patient that did not achieve normalization
or near-normalization was dosed at the 1.5 mg/kg level.

Preliminary data from the PHYOX1 trial presented in November 2019 showed that nedosiran was well tolerated based on data from 18 participants (15

adults and three adolescents [participants 13-16 years old]) with PH1 (n=15) and PH2 (n=3) and 25 adult healthy volunteers. To date, seven serious adverse
events (“SAEs”) have occurred in six participants in Group B; none was deemed related to the study drug, and all seven SAEs have resolved. A total of seven
participants dosed with nedosiran experienced mild or moderate injection-site reactions, all of which resolved without intervention in a mean of 25 hours. No
clinically meaningful safety signals were observed, including from liver function tests.

We received approval to proceed with the Phase 2 (“PHYOX2”) and Phase 3 (“PHYOX3”) studies in 2019 in a subset of the countries in which we
intend to open trial sites. We initiated dosing of participants rolling over from the PHYOX1 trial into the recently approved PHYOX3 study, a long-term,
multi-dose, open-label, roll-over extension study. We expect initial multi-dose data from this trial to be available in March 2020. Additionally, we are
currently enrolling patients in our registration trial, PHYOX2, for which enrollment is expected to be completed by the end of the first half of 2020. The last
patient visit in the PHYOX2 trial is expected by the end of 2020. In addition to the PHYOX2 clinical trial, we have multiple additional trials planned. In the
first half of 2020, further clinical studies will be initiated in patients with PH3 (PHYOX4) and in PH1 and PH2 patients with severe renal impairment,
including those in dialysis (PHYOX7), pending regulatory approvals. A study in PH1 and PH2 patients aged 2-5 years, with relatively intact renal function
(PHYOX8), is planned for the second half of 2020, pending regulatory approvals.

In discussions with the FDA, we received feedback indicating alignment on a path to the full approval of nedosiran for the treatment of PH1 and PH2

based on achievement of substantial reduction of high baseline urinary oxalate in patients with PH1 and PH2 in the PHYOX2 pivotal trial. With this feedback,
we believe we have a path to seek full approval in both PH1 and PH2 based on PHYOX2 results. In July 2019, we received Breakthrough Therapy
Designation from the FDA for the development of nedosiran for the treatment of PH1. We plan to continue our dialogue with the FDA regarding endpoints
for studies involving patients with PH3 as part of the PHYOX clinical development program for nedosiran and potentially an expansion of the Breakthrough
Therapy Designation to include PH2.

The ultimate goal of any PH therapy is for patients to live a normal life without the need to comply with hyperhydration and urine alkalization

supporting therapies in order to prevent the formation of new calcium oxalate crystals. The PHYOX3 study will evaluate nedosiran’s long-term effect in
reducing urinary oxalate levels to the normal range, enabling patients’ supportive therapies to be gradually decreased or eliminated. To best achieve this
ultimate goal, Dicerna has developed a once-monthly fixed-dose injection regimen of nedosiran. This once-monthly formulation of nedosiran is designed to
avoid the sudden oxalate spikes that could occur with less frequent administration or missed dosages and which could result in the formation of kidney stones
and renal failure. To maximize patient convenience, we are developing pre-filled syringes to enable self-administration by most PH patients without the need
for involvement of a healthcare provider.

RG6346 for Chronic Hepatitis B Virus Infection

Our GalXC RNAi platform-based product candidate for the treatment of chronic HBV infection, RG6346, is currently being tested in a Phase 1 clinical
trial. HBV is reported to be the most common serious liver infection affecting an estimated 292 million people globally. Chronic HBV is characterized by the
presence of the hepatitis B surface antigen (“HBsAg”) for six months or more.

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Current therapies for HBV include nucleoside analogs (“NUCs”) and pegylated interferon regimens. Interferons are less effective at suppressing viral

replication and are associated with several side effects. NUCs are relatively safe to use but usually require indefinite therapy that increases the risk of non-
adherence. Furthermore, the vast majority of patients treated with these agents do not achieve an immunological cure of chronic HBV infection as defined by
the sustained clearance of HBsAg and HBV deoxyribonucleic acid (“DNA”) suppression in patient blood or serum. The chance of achieving a long-term
immunological cure may be significantly enhanced with the introduction of novel drugs, such as RG6346, designed to reduce intrahepatic and serum HBsAg,
as well as HBV DNA. These novel drugs may be used in combination with each other and existing therapies, such as NUCs.

RG6346 targets HBV messenger RNA and has shown a greater than 99.9% reduction in circulated HBsAg in mouse models of HBV infection. We are

evaluating the potential of RG6346 to reduce HBsAg expression and HBV DNA in HBV patients in a subcutaneous dosing paradigm in a Phase 1 clinical
trial. We received Clinical Trial Application (“CTA”) and ethics committee approvals for this trial in healthy volunteers and patients with chronic HBV
infection in New Zealand in December 2018 and in Australia, Hong Kong, South Korea, and Thailand in 2019. The Phase 1 study was initiated in December
2018 and the first participants were dosed in January 2019. We anticipate human proof-of-concept data from the existing cohorts of our RG6346 Phase 1
clinical trial to be available in the third quarter of 2020.

The DCR-HBVS-101 clinical trial is a Phase 1 randomized, placebo-controlled, double-blind study designed to evaluate the safety and tolerability of

RG6346 in healthy volunteers and in patients with non-cirrhotic chronic HBV. Secondary objectives are to characterize the pharmacokinetic profile of
RG6346 and to evaluate preliminary antiviral efficacy, as well as characterize the pharmacodynamics of RG6346 on HBsAg and HBV DNA levels in blood.
The DCR-HBVS-101 clinical trial is divided into three phases or groups:

•

•

•

Group A is a single-ascending-dose arm in which 30 healthy volunteers received a dose of RG6346 (0.1, 1.5, 3.0, 6.0, or 12.0 mg/kg) or placebo,
with a four-week follow-up period. Group A dosing was completed in August 2019.

Group B is a single-dose arm in which eight participants with chronic HBV who are naïve to NUC therapy receive a 3.0 mg/kg dose of RG6346 or
placebo; these participants will be followed for at least 12 weeks. We initiated Group B dosing in the third quarter of 2019, in parallel with Group C
at the 3.0 mg/kg dose level. Group B dosing is expected to be completed in the first quarter of 2020.

Group C is a multiple-ascending-dose arm in which RG6346 (1.5, 3.0, or 6.0 mg/kg) or placebo will be administered to 18 participants with chronic
HBV who are already being treated with NUCs, with a treatment and follow-up period of 16 weeks or more.

◦ We dosed the first patient, from Group C, at a dose of 1.5 mg/kg, in May 2019. The final patient’s last dose in the 1.5 mg/kg dose group was

administered in October 2019.

◦ We dosed the first patient in 3.0 mg/kg cohort in August 2019. The final patient’s last dose in the 3.0 mg/kg dose group was administered in

January 2020.

◦ We dosed the first patient in the 6.0 mg/kg cohort in December 2019 and are enrolling the remainder of the cohort.

Participants with chronic HBV in Groups B and C, in whom HBsAg will have dropped equal to or more than 1 log10 IU/mL below their baseline at the

time of their last scheduled study visit, will continue to be followed until their HBsAg level is less than 1 log10 IU/mL below their baseline value. Multiple
patients had achieved this level of HBsAg reduction at their last scheduled visit.

In order to facilitate development and potential commercialization of our product candidate, RG6346, in combination with other novel drugs, we

entered into a research collaboration and licensing agreement with Roche in October 2019. Under the terms of the agreement, we will be leading the
development of RG6346 through the current Phase 1 trial, and pending favorable results, Roche intends to further develop RG6346 with the overall goal of
developing a combination regimen to achieve a long-term immunological cure of chronic HBV in combination with additional Roche product candidates in
Phase 2 and Phase 3 clinical trials.

DCR-A1AT for Alpha-1 Antitrypsin Deficiency-Associated Liver Disease

Our GalXC RNAi platform-based product candidate for the treatment of A1AT deficiency-associated liver disease, DCR-A1AT, is currently being

tested in a Phase 1/2 clinical study. A1AT deficiency is an inherited disorder that can lead to liver disease in children and adults and lung disease in adults.
The disorder is caused by mutations in a gene called SERPINA1. This gene, when functioning normally, provides instructions for making the A1AT protein,
which protects the body from an enzyme called neutrophil elastase. This enzyme is released from white blood cells to fight infection, but it can attack normal
tissues if not tightly controlled by A1AT. Mutations in the SERPINA1 gene can result in a deficiency of A1AT or, most commonly, an abnormal form of the
protein that cannot control neutrophil elastase. Accumulation of abnormal A1AT protein in the liver can lead to liver disease. Uncontrolled neutrophil elastase
can also destroy alveoli (small air sacs in the lungs) and cause lung disease.

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Approximately 7% of children with A1AT deficiency who develop liver disease develop cirrhosis, and over 15% require liver transplantation. About
10% of adults with A1AT deficiency who develop liver disease develop cirrhosis due to formation of scar tissue in the liver, and over 15% of those require
liver transplantation. Individuals affected by A1AT deficiency are also at risk of developing hepatocellular carcinoma, a type of liver cancer. Liver
transplantation is currently the only effective treatment for A1AT deficiency-associated liver disease.

A1AT deficiency occurs all over the world, though its prevalence varies by population. The disorder affects roughly one in 1,500 to 3,500 individuals

with European ancestry but is uncommon in people of Asian descent. Congenital A1AT deficiency is estimated to affect 2.4 people out of every 10,000 in the
EU. It is estimated that less than 10% of individuals with A1AT deficiency are diagnosed. The diagnosis of A1AT-associated liver or lung disease is a
diagnosis of exclusion, as no specific clinical diagnostic criteria exist for these diseases. Therefore, according to the Journal of the Chronic Obstructive
Pulmonary Disease Foundation Clinical Practice Guidelines, all individuals with chronic obstructive pulmonary disease should be tested for A1AT deficiency,
and all individuals with unexplained chronic liver disease should be tested for A1AT deficiency as well. Nevertheless, even in symptomatic patients, the
correct diagnosis is often delayed by many years.

In December 2019, the European Commission granted orphan drug designation to DCR-A1AT for the treatment of congenital A1AT deficiency based
on a positive opinion from the COMP of the EMA. We submitted a CTA to the Swedish Medical Products Agency in June 2019 to conduct a first-in-human
Phase 1/2 study of DCR-A1AT, an investigational therapy from our GalXC™ technology platform. We expect dosing of the first patient in this Phase 1/2
study, named ESTRELLA, to occur in the second half of 2020.

The initial DCR-A1AT-101 clinical trial is a Phase 1/2 randomized, placebo-controlled study designed to evaluate the safety and tolerability of DCR-

A1AT in healthy volunteers and in patients with A1AT deficiency-associated liver disease. Secondary objectives are to characterize the pharmacokinetic
profile of DCR-A1AT, to evaluate preliminary pharmacodynamics on serum A1AT protein concentrations, and to characterize the effect of DCR-A1AT on
A1AT deficiency-associated liver disease evaluated by liver biopsy. Exploratory objectives include characterization of the effect of DCR-A1AT on A1AT
deficiency-associated liver disease evaluated by biochemical markers as well as the effect on liver stiffness. The DCR-A1AT-101 clinical trial is divided into
two phases or groups:

•

•

Group A is a single-ascending-dose arm in which a single dose of DCR-A1AT (0.1, 1.0, 3.0, 6.0, or 12.0 mg/kg) or placebo will be administered to
up to 36 healthy volunteers, with a minimum 8-week follow-up. The first participant in Group A was dosed in November 2019; we expect dosing of
Group A to be completed in the second half of 2020.

Group B is a multiple-ascending-dose arm in which DCR-A1AT (doses yet to be determined) or placebo will be administered to up to 24 participants
with A1AT with a treatment and follow-up period of 12 weeks or more.

DCR-Undisclosed

We are currently pursuing preclinical development of an undisclosed candidate for the treatment of a common disease involving the liver. We expect to

begin a Phase 1 study for this program in 2021.

Partner Development Programs

Novo Collaboration

On November 15, 2019, we entered into a Collaboration and License Agreement with Novo (the “Novo Collaboration Agreement”). Under the terms
of the Novo Collaboration Agreement, we and Novo will seek to use Dicerna’s proprietary GalXC™ RNAi platform technology to progress novel therapies
for the treatment of liver-related cardiometabolic diseases towards clinical development and commercialization. Under the Novo Collaboration Agreement,
we and Novo plan to explore more than 30 gene targets associated with liver disease with the goal of delivering multiple clinical candidates for disorders
including chronic liver disease, non-alcoholic steatohepatitis (“NASH”), type 2 diabetes, obesity, and rare diseases. We will conduct and fund discovery and
preclinical development to clinical candidate selection for each liver cell target. Novo will be responsible for all further development and commercialization,
with Dicerna manufacturing clinical candidates selected for Phase-1-related clinical development, subject to reimbursement for its manufacturing costs. We
also retain the ability to opt in to co-development of two programs during clinical development in Phases 1-3, subject to limitations in the event of a change in
control of the Company. If we exercise the co-development option, we also have an option to co-promote the products in the United States, subject to
limitations in the event of a change of control. Additionally, we may lead the development and commercialization of two programs targeting orphan liver
diseases, with Novo retaining the ability to opt in to both programs in Phases 1-3. We and Novo will share profit and loss for the Company’s orphan liver and
Novo products should both parties elect to co-develop.

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The Novo Collaboration Agreement provides that we will work exclusively with Novo during the research collaboration period on the discovery,
research, development, and commercialization of hepatocyte targets not otherwise subject to our existing partnerships and that Novo will, during a specified
discovery period, work exclusively with Dicerna in any new research and development of compounds and products directed to collaboration targets using
small interfering RNA (“siRNA”) conjugated to the sugar GalNAc to reduce the expression of specific target genes in the liver. Under the Novo Collaboration
Agreement, we will provide Novo with exclusive and non-exclusive licenses and manufacturing support to enable Novo to commercialize products derived
from or containing compounds developed pursuant to such agreement.

Under the terms of the Novo Collaboration Agreement, Novo paid us a non-refundable upfront payment of $175.0 million in January 2020. Also, in

December 2019, Novo made a $50.0 million equity investment in Dicerna at a premium pursuant to a share issuance agreement between the parties (the
“Novo Share Issuance Agreement”). We are also eligible to receive an additional $75.0 million ($25.0 million at the end of each of the first three years of the
Novo Collaboration Agreement), contingent upon us delivering GalXC™ molecules for a defined number of targets, and additional payments totaling up to
$357.5 million per target upon achievement of specified development, regulatory, and commercial milestones. In addition, the Novo Collaboration Agreement
provides that Novo will pay us mid-single-digits to mid-teens royalties on product sales on a country-by-country and product-by-product basis until the later
of 10 years after the date of first commercial sale of each product in such country, expiration of specified patent rights in such country, or the expiration of
specified regulatory exclusivity in such country for GalXC products, subject to royalty step-down provisions set forth in the agreement.

Roche Collaboration

On October 30, 2019, we entered into a Collaboration and License Agreement with Roche (the “Roche Collaboration Agreement”). Under the terms of

the Roche Collaboration Agreement, we and Roche will seek to progress RG6346, our investigational therapy in Phase 1 clinical development, toward
worldwide development and commercialization. The Roche Collaboration Agreement also provides an option for the companies to collaborate in the
discovery, development, and commercialization of oligonucleotide therapeutics intended for the treatment of HBV infection.

The Roche Collaboration Agreement requires that we complete the ongoing Phase 1 clinical trial, along with additional Phase 1 cohorts upon the

request of Roche, who will reimburse us for the cost of the additional cohorts, after which Roche will lead the development and commercialization of the
RG6346 program. Roche also has until receipt of interim Phase 1 data from the RG6346 Phase 1 study (but no later than December 31, 2020) to initiate a
research and development collaboration with us to pursue up to five targets selected by Roche, which are intended primarily to treat HBV. Under the terms of
the Roche Collaboration Agreement, the goal of such research and development will be to select compounds developed by us or Roche for Roche’s continued
development and commercialization. The Roche Collaboration Agreement provides that we and Roche’s research and early development organization will
work exclusively with each other during the research and development collaboration period on the discovery, research, and development of such targets
selected by Roche, which includes our performance of certain services. Under the Roche Collaboration Agreement, we will provide Roche with exclusive and
non-exclusive licenses to support Roche’s activities and to enable Roche to commercialize products derived from or containing compounds developed
pursuant to such agreement.

Under the terms of the Roche Collaboration Agreement, Roche paid us a non-refundable upfront payment of $200.0 million in January 2020. We are

also eligible to receive additional payments totaling up to approximately $1.47 billion, which includes payments upon achievement of specified development,
regulatory, and commercial milestones. In addition, the Roche Collaboration Agreement provides that Roche will pay us up to mid-teens percent royalties on
product sales. Royalties are payable until the later of 10 years after first commercial sale of each product in a country, expiration of patent rights in a country,
or for products containing RG6346 in a given country, the expiration of data or regulatory exclusivity, subject to certain royalty step-down provisions set forth
in the agreement. In addition, we have an option to co-fund the development of products including RG6346 under the agreement and, if exercised, receive
high-twenties to mid-thirties royalty rates on the net sales of products in the U.S. If we exercise the co-funding option, we also have an option to co-promote
products containing RG6346 in the U.S.

Lilly Collaboration

On October 25, 2018, we entered into a Collaboration and License Agreement with Lilly (the “Lilly Collaboration Agreement”). The Lilly
Collaboration Agreement is for the discovery, development, and commercialization of potential new medicines in the areas of cardiometabolic disease,
neurodegeneration, and pain. Under the terms of the Lilly Collaboration Agreement, we and Lilly will seek to use our proprietary GalXC RNAi technology
platform to progress new drug targets toward clinical development and commercialization. In addition, we will collaborate with Lilly to extend the GalXC
RNAi platform technology to non-liver tissues, including neural tissues.

The Lilly Collaboration Agreement provides that we will work exclusively with Lilly in the neurodegeneration and pain fields with the exception of

mutually agreed upon orphan indications. Additionally, we will work exclusively with Lilly on select targets in

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the cardiometabolic field. Under the Lilly Collaboration Agreement, we will provide Lilly with exclusive and non-exclusive licenses to support the
companies’ activities and to enable Lilly to commercialize products derived from or containing compounds developed pursuant to such agreement. The Lilly
Collaboration Agreement contemplates in excess of 10 targets.

Under the terms of the Lilly Collaboration Agreement, Lilly paid us a non-refundable upfront payment of $100.0 million, and made a concurrent

$100.0 million equity investment in Dicerna at a premium pursuant to a share issuance agreement between the parties (the “Lilly Share Issuance
Agreement”). Under the Lilly Collaboration Agreement, we are also eligible to potentially receive up to approximately $350.0 million per target in
development and commercialization milestones, in addition to a $5.0 million payment due for each of the non-hepatocyte targets when a product achieves
proof of principle in an animal model. In addition, the Lilly Collaboration Agreement also provides that Lilly will pay us mid-single to low-double-digit
royalties on product sales on a country-by-country and product-by-product basis until the later of expiration of patent rights in a country, the expiration of data
or regulatory exclusivity in such country, or 10 years after the first product sale in such country, subject to certain royalty step-down provisions set forth in the
agreement.

We expect Lilly to submit an Investigational New Drug (“IND”) application or CTA filing for the first GalXC molecule being developed under the

Lilly Collaboration Agreement, LY3561774, in late 2020.

Alexion Collaboration

On October 22, 2018, we entered into a Collaborative Research and License Agreement (the “Alexion Collaboration Agreement”) with Alexion for the

joint discovery and development of RNAi therapies for complement-mediated diseases. Under the terms of the Alexion Collaboration Agreement, we will
collaborate with Alexion on the discovery and development of GalXC candidates for the treatment of complement-mediated diseases with potential global
commercialization by Alexion. We will lead the joint discovery and research efforts through the preclinical stage, and Alexion will lead development efforts
beginning with Phase 1 studies. We will be responsible for manufacturing of the GalXC candidates for use through the completion of Phase 1, the costs of
which, after an initial cost-sharing period, will be paid by Alexion. Alexion will generally be responsible for the manufacturing of any product candidate
subsequent to the completion of Phase 1.

Under the terms of the Alexion Collaboration Agreement, Alexion paid us a non-refundable upfront payment of $22.0 million, with Alexion

Pharmaceuticals making a concurrent $15.0 million equity investment in Dicerna at a premium pursuant to a share issuance agreement between us and
Alexion Pharmaceuticals (the “Alexion Share Issuance Agreement”). The Alexion Collaboration Agreement also provides for potential additional payments
to Dicerna of up to $600.0 million from proceeds from target option exercises and development and sales milestones, as defined in the agreement, which
includes option exercise fees of up to $20.0 million, representing $10.0 million for each of the additional candidates selected; development milestones of up
to $105.0 million for each product; and aggregate sales milestones of up to $160.0 million. Under the agreement, Alexion will also pay us mid-single to low-
double-digit royalties on potential product sales on a country-by-country, product-by-product basis until the later of the expiration of patent rights in a
country, the expiration of market or regulatory exclusivity in such country, or 10 years after the first product sale in such country, subject to certain royalty
step-down provisions set forth in the agreement.

In November 2019, the Company and Alexion amended the Alexion Collaboration Agreement to clarify funding of certain manufacturing costs for

each of the two initial targets and increased milestone payments for the additional targets if Alexion exercised its options for the two additional targets.

In December 2019, Alexion exercised its options for the exclusive rights to two additional targets within the complement pathway for the discovery

and development of GalXC™ RNAi molecules. These exercises expand the companies’ existing research collaboration and license agreement to now
encompass four targets within the complement pathway, and provide Alexion with exclusive worldwide licenses, as well as development and commercial
rights to the GalXC RNAi molecules developed in the collaboration. In connection with the option exercises, Alexion paid Dicerna a total of $20.0 million, or
$10.0 million in option exercise fees per additional new target that will be recognized into revenue as the related services are performed.

BI Collaboration

On October 27, 2017, we entered into a Collaborative Research and License Agreement with BI (the “BI Agreement”), pursuant to which we and BI

agreed to jointly research and develop product candidates for the treatment of chronic liver diseases, with an initial focus on nonalcoholic steatohepatitis
(“NASH”) using our GalXC platform. NASH is caused by the buildup of fat in the liver, potentially leading to liver fibrosis and cirrhosis. NASH has an
especially high prevalence among obese and diabetic patients and is an area of high unmet medical need.

The BI Agreement is for the development of product candidates against one target gene with an option for BI to add the development of product

candidates that target a second gene (the “Second Target”). We are responsible for the discovery and initial

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profiling, including primary preclinical studies, synthesis, and delivery of the product candidates. BI is responsible for evaluating and selecting the product
candidates for further development. If BI selects one or more product candidates, it will be responsible for further preclinical development, clinical
development, manufacturing, and commercialization of those products. Also pursuant to the BI Agreement, we granted BI a worldwide license in connection
with the research and development of the product candidates and have transferred to BI certain intellectual property rights of the product candidates selected
by BI for clinical development and commercialization. We also may provide assistance to BI in order to help BI further develop selected product candidates.

Under the terms of the BI Agreement, BI agreed to pay us a non-refundable upfront payment of $10.0 million for the first target. During the term of the
research program, BI will reimburse Dicerna the cost of materials and third-party expenses that have been included in the preclinical studies up to an agreed-
upon limit. We are eligible to receive up to $191.0 million in potential development and commercial milestones related to the initial target. We are also
eligible to receive royalty payments tiered from high single digits up to low double-digits on potential net sales on a country-by-country (or territory-by-
territory), product-by-product basis until the later of the expiration of the last to expire valid claim of any product patent right covering the composition of
matter of such product or 10 years after the first product sale in such country or territory, subject to certain royalty step-down provisions set forth in the
agreement. BI’s Second Target option provided for an option fee payment of $5.0 million and success-based development and commercialization milestones
and royalty payments to Dicerna.

In October 2018, BI exercised its Second Target option, which entitled the Company to a non-refundable payment of $5.0 million and reimbursement

of $0.7 million for certain third-party expenses upon the agreement of a research work plan and budget for the Second Target. The terms of the Second Target
option exercise and related rights and obligations associated with the Second Target were agreed between the Company and BI in an Additional Target
Agreement (the “ATA”), which was entered into on December 31, 2018. Under the terms of the ATA, during the term of the research program, BI will
reimburse us for certain expenses. We are eligible to receive up to $170.0 million in potential development and commercial milestones related to the Second
Target. We are also eligible to receive tiered royalty payments on potential global net sales, subject to certain adjustments, in the mid-single digits. Other than
as set forth in the ATA, development of the Second Target will be subject to the terms of the BI Agreement.

In addition to establishing the terms of the Second Target option exercise, the ATA also amends the BI Agreement to provide the parties with the

opportunity to consider the development of product candidates targeting a further additional target gene (the “Third Target” option).

Intellectual Property

We are seeking multifaceted and multi-layered protection for our intellectual property on a global level that includes licenses, confidentiality and non-
disclosure agreements, copyrights, patents, trademarks, and trade secrets. We enter into confidentiality and proprietary rights agreements with our employees,
consultants, collaborators, subcontractors, and other third parties and generally seek to control access to our documentation and proprietary information as
well as ownership to nascent intellectual property.

Patents and proprietary rights

We own U.S. patents and pending patent applications with claims to methods and compositions of matter that cover various aspects of our RNAi
technology and our discovery technologies, including our proprietary GalXC technology. These U.S. patents include the following platform patents that
protect our ability to make our structures: U.S. 8,349,809 (issued in January 2013, with a projected expiration date of January 2030); U.S. 8,513,207 (issued
in August 2013, with a projected expiration date of May 2030); and U.S. 8,927,705 (issued in January 2015, with a projected expiration date of July
2030). These patents are from the same family of patents and constitute the core patents for our GalXC technology. We also own numerous patents and patent
applications covering specific RNAi sequences that drive activity against a substantial number of high-value disease targets, including targets for our
disclosed core and non-core programs. We have issued or pending claims to RNAi molecules, pharmaceutical compositions/formulations, methods of use,
including in vitro and in vivo methods of reducing target gene expression, methods of treatment, methods of inhibiting cell growth, and methods of synthesis.

Our strategy around protection of our proprietary technology, including any innovations and improvements, is to obtain patent coverage in various
jurisdictions around the world with a focus on jurisdictions that represent significant global pharmaceutical markets. Generally, patents have a term of 20
years from the earliest non-provisional priority date, assuming that all maintenance fees are paid, no portion of the patent has been terminally disclaimed, and
the patent in question has not been invalidated by a court with proper jurisdiction. In certain jurisdictions, and in certain circumstances, patent terms can be
extended or shortened. We are obtaining worldwide patent protection for novel molecules, composition of matter, pharmaceutical formulations, methods of
use, including treatment of disease, methods of manufacture, and other novel uses for the inventive molecules originating from our research and development
efforts, and other things. We continuously assess whether it is strategically more favorable to maintain confidentiality for the “know-how” regarding a novel
invention or the trade secrets that may be inherent in a given process or method rather than pursue

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patent protection. For each patent application that is filed, we strategically tailor our claims in accordance with the existing patent landscape around a
particular patentable matter.

We cannot predict with any certainty if any third-party U.S. or foreign patent rights, or other proprietary rights, will be deemed infringed by the use of
our technology. Nor can we predict with certainty which, if any, of these rights will or may be asserted against us by third parties. Should we need to defend
ourselves and our collaborators against any such claims, substantial costs may be incurred. Furthermore, parties making such claims may be able to obtain
injunctive or other equitable relief, which could effectively block our ability to develop or commercialize some or all of our products in the U.S. and abroad
and could result in the award of substantial damages. In the event of a claim of infringement, we or our collaborators may be required to obtain one or more
licenses from a third party. There can be no assurance that we can obtain a license on a reasonable basis should we deem it necessary to obtain rights to an
alternative technology that meets our needs. The failure to obtain a license may have a material adverse effect on our business, results of operations, and
financial condition.

We also rely on trade secret protection for our confidential and proprietary information. No assurance can be given that we can meaningfully protect

our trade secrets on a continuing basis. Others may independently develop substantially equivalent confidential and proprietary information or otherwise gain
access to our trade secrets.

It is our policy to require our employees and consultants, outside scientific collaborators, sponsored researchers, and other advisors who receive

confidential information from us, to execute confidentiality agreements upon the commencement of employment or consulting relationships. These
agreements provide that all confidential information developed or made known to these individuals during the course of the individual’s relationship with us
is to be kept confidential and is not to be disclosed to third parties except in specific circumstances. The agreements provide that all inventions conceived by
an employee shall be our property, except that employees are permitted to invent in unrelated fields during non-work hours, and such inventions would not be
our property. There can be no assurance, however, that these agreements will provide meaningful protection or adequate remedies for our trade secrets in the
event of unauthorized use or disclosure of such information.

See Item 1A – “Risk Factors – Risks Related to Intellectual Property” for a more detailed discussion of the risks to our intellectual property.

Competition

To our knowledge, there are no companies other than ourselves and our collaborators developing GalXC molecules for therapeutic use. We believe that
our scientific knowledge and expertise in RNAi-based therapies provide us with competitive advantages over the various companies and other entities that are
attempting to develop similar treatments. However, many of our competitors have significantly greater financial resources and expertise in research and
development, manufacturing, preclinical testing, conducting clinical trials, obtaining regulatory approvals, and marketing approved products than we do. Our
competition can be grouped into three broad categories:

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•

Commercialized products and product candidates, as well as development programs that treat the same diseases for which we are also developing
treatments. These companies include Oxthera AB, Allena Pharmaceuticals, Inc., and Arbutus Biopharma;

Other companies working to develop RNAi therapeutic products. These companies include Alnylam Pharmaceuticals, Inc., Arrowhead
Pharmaceuticals, Inc., Silence Therapeutics Plc, Quark Pharmaceuticals, Inc., Avidity Biosciences, Inc.; and

Companies developing technology known as antisense, which, similar to the RNAi therapy we use, attempts to silence specific genes. These
companies include Ionis Pharmaceuticals, Inc. and Wave Life Sciences Ltd.

Our success will be based, in part, upon our ability to identify, develop, and manage a portfolio of drugs that offer competitive advantages such as

improved safety, more convenient dosing, and greater efficacy than competing products for the treatment of our targeted patients. Our commercial
opportunity could be reduced or eliminated if our competitors develop and commercialize products that are superior to the products we may develop.

Summarized below is information on perceived competition for our most advanced product candidates.

Primary Hyperoxaluria

Currently, there are no approved drugs to treat primary hyperoxaluria. We believe that the following product candidates in clinical development, if

approved, could compete with nedosiran:

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Company

Drug

Drug Description

Phase

Alnylam Pharmaceuticals, Inc.

Lumasiran

RNAi therapeutic targeting glycolate oxidase specifically for
the treatment of PH1

Rolling NDA submission

Oxthera AB

Oxabact

Allena Pharmaceuticals, Inc.

Reloxaliase
(formerly ALLN-177)

Bacteria intended to interact with the intestinal epithelial cells
and promote secretion of oxalate from the body

RNAi enzyme to reduce oxalate levels

Phase 3

Phase 2

There are also other companies that have preclinical development programs for the potential treatment of PH.

Hepatitis B Virus

Many companies across the biotechnology and pharmaceutical industries are seeking improved treatments for chronic HBV infection. It is generally

accepted that improved treatments will consist of combinations of therapeutic agents, acting via different mechanisms of action. We consider our competitors
to be those developing potential treatments for chronic HBV that act via a similar mechanism of action as our RG6346 product candidate; specifically,
potential treatments that block or lead to the destruction of the mRNA and pgRNA of HBV. It may be possible for others to develop an improved treatment
for chronic HBV that does not include this mechanism of action.

We believe that the following product candidates in clinical development, if approved, could compete with RG6346:    

Company

Drug

Drug Description

Alnylam Pharmaceuticals, Inc.
Collaborative Partner: Vir
Biotechnology

Arbutus Biopharma

Arrowhead Pharmaceuticals, Inc.
Collaborative Partner: Janssen

ALN-HBV02
VIR-2218

AB-729

RNAi-GalNAc conjugate

RNAi-GalNAc conjugate

JNJ-3989

RNAi-GalNAc conjugate

Phase

Phase 1/2

Phase 1a/1b

Phase 2

Phase 2

Ionis Pharmaceuticals, Inc.
Collaborative Partner: GlaxoSmithKline IONIS-HBVRX

Ionis Pharmaceuticals, Inc.
Collaborative Partner: GlaxoSmithKline IONIS-HBV-LRX

RNA-targeted antisense oligonucleotide

RNA-targeted antisense oligonucleotide-GalNAc conjugate

Phase 2

There are also other companies that have preclinical development programs for the potential treatment of HBV.

Alpha-1 Antitrypsin Deficiency-Associated Liver Disease

Currently, there are no approved drugs to treat alpha-1 antitrypsin deficiency-associated liver disease. We believe that the following product candidates

in clinical development, if approved, could compete with DCR-A1AT:

Company

Drug

Drug Description

Arrowhead Pharmaceuticals, Inc.

ARO-AAT

RNAi-GalNAc conjugate

Alnylam Pharmaceuticals, Inc.

ALN-AAT02

RNAi-GalNAc conjugate

Phase

Phase 2/3

Phase 1/2

Vertex Pharmaceuticals, Inc.

Vertex Pharmaceuticals, Inc.

VX-814

VX-864

Oral small-molecule corrector of misfolded AAT protein

Phase 1

Oral small-molecule corrector of misfolded AAT protein

Phase 1

If our lead product candidates are approved for the indications for which we undertake clinical trials, they may compete with therapies that are either in

development or currently marketed by our competitors. However, notwithstanding the availability of existing drugs or drug candidates, we believe sufficient
unmet medical need exists to warrant the continuing advancement of our investigational RNAi therapeutic programs.

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Sales and Marketing

Our current focus is on the development of our existing portfolio, the initiation and completion of clinical trials, and, where appropriate, the
registration of our product candidates. We currently do not have marketing, sales, or distribution capabilities, although we are actively developing such
capabilities. If we receive marketing and commercialization approval for any of our product candidates, we intend to market the product either directly or
through strategic alliances and distribution agreements with third parties. The ultimate implementation of our strategy for realizing the financial value of our
product candidates is dependent on the results of clinical trials for our product candidates, the availability of funds, our ability to obtain adequate coverage of
and reimbursement for our products, compliance with laws governing our sales and marketing activities, and the ability to negotiate acceptable commercial
terms with third parties.

Manufacturing and Supply

We do not currently own or operate any manufacturing facilities for the production of preclinical, clinical, or commercial quantities of any of our
product candidates. For each product candidate, we currently contract with third-party manufacturers and suppliers for certain drug materials, and we expect
to continue to do so to meet the preclinical and clinical requirements of our product candidates.

In November 2019, we entered into an initial five-year agreement with a supplier for the development, manufacture, and supply of clinical and
commercial product. In January 2020, we executed an amendment to this agreement which allows for advance preferential scheduling to the manufacturing
line.

We typically order raw materials and services on a purchase order basis. We have not entered into long-term purchase commitments; however, from

time to time, we make binding demand-based forecasts nine to 18 months ahead of planned supply requirements.

Manufacturing is subject to extensive regulations that impose various procedural and documentation requirements, which govern record-keeping,
manufacturing processes and controls, personnel, quality control, and quality assurance, among others. Our contract manufacturing organizations manufacture
our product candidates under current Good Manufacturing Practice (“cGMP”) conditions. cGMP is a regulatory standard for the production of
pharmaceuticals that will be used in humans.

Government Regulation and Product Approval

Governmental authorities in the U.S., at the federal, state and local level, and other countries extensively regulate, among other things, the research,
development, testing, manufacture, quality control, approval, labeling, packaging, promotion, storage, record-keeping, advertising, distribution, sampling,
pricing, sales and marketing, safety, post-approval monitoring and reporting, and export and import of products such as those we are developing. Our product
candidates must be approved by the FDA through the NDA process before they may be legally marketed in the U.S. and will be subject to similar
requirements in other countries prior to marketing in those countries. The process of obtaining regulatory approvals and the subsequent compliance with
applicable federal, state, local and foreign statutes and regulations require the expenditure of substantial time and financial resources and the extensive laws
and regulations that apply to drug products and product candidates in the U.S. are subject to change.

U.S. government regulation

NDA approval processes

In the U.S., the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act (the “FDCA”) and implementing regulations. Failure to comply
with the applicable U.S. requirements at any time during the product development or approval process, or after approval, may result in a delay of approval or
subject an applicant to administrative or judicial sanctions, any of which could have a material adverse effect on us. These sanctions could include:

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refusal to approve pending applications;

withdrawal of an approval;

imposition of a clinical hold;

issuance of warning or untitled letters;

product recalls;

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product seizures;

refusals of government contracts;

total or partial suspension of production or distribution; or

injunctions, fines, restitution, disgorgement, civil penalties or criminal prosecution.

The process required by the FDA before a drug may be marketed in the U.S. generally includes the following:

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completion of non-clinical laboratory tests, animal studies, and formulation studies conducted according to Good Laboratory Practices (“GLPs”)
or other applicable laws and regulations;

submission to the FDA of an IND, which must become effective before human clinical trials may begin;

approval by an institutional review board (“IRB”) at each clinical site before each trial may be initiated;

performance and inspection of adequate and well-controlled human clinical trials and clinical data according to FDA regulations and Good
Clinical Practices (“GCP”) to establish the safety and efficacy of the product candidate for its intended use;

submission of an NDA to the FDA and the FDA’s acceptance of the NDA for filing;

satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the product candidate is produced to assess
compliance with cGMP to assure that the facilities, methods, and controls are adequate to preserve the product candidate’s identity, strength,
quality, and purity;

satisfactory completion of an FDA inspection of the major investigational sites to ensure data integrity and assess compliance with GCP
requirements; and

FDA review and approval of the NDA.

Once a pharmaceutical candidate is identified for development, it enters the preclinical or non-clinical testing stage. Non-clinical tests include
laboratory evaluations of product chemistry, stability, toxicity, and formulation, as well as animal studies. An IND sponsor must submit the results of the non-
clinical tests, together with manufacturing information and analytical data, to the FDA as part of the IND. Some non-clinical testing may continue even after
the IND is submitted. In addition to including the results of the non-clinical studies, manufacturing, and quality information, the IND will also include a
protocol detailing, among other things, the objectives of the clinical trial, the parameters to be used in monitoring safety and the effectiveness criteria to be
evaluated if the first phase lends itself to an efficacy determination. The IND automatically becomes effective 30 days after receipt by the FDA, unless the
FDA, within the 30-day time period, places the IND on clinical hold. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns
before clinical trials can begin. A clinical hold may occur at any time during the life of an IND and may affect one or more specific studies or all studies
conducted under the IND.

All clinical trials must be conducted under the supervision of one or more qualified investigators in accordance with FDA regulations and GCP. They
must be conducted under protocols detailing the objectives of the trial, dosing procedures, research subject selection and exclusion criteria and the safety and
effectiveness criteria to be evaluated. Each protocol and protocol amendments must be submitted to the FDA as part of the IND, and progress reports
detailing the status of the clinical trials must be submitted to the FDA annually. Sponsors also must timely report to the FDA serious and unexpected adverse
reactions, any clinically important increase in the rate of a serious suspected adverse reaction over that listed in the protocol or investigation brochure or any
findings from other studies or animal or in vitro testing that suggest a significant risk in humans exposed to the drug. All research subjects or their legally
authorized representatives must provide their informed consent in writing prior to their participation in a clinical trial. An IRB at each institution participating
in the clinical trial must review and approve the protocol and the informed consent form before a clinical trial commences at that institution, monitor the study
until completed and otherwise comply with IRB regulations. Information about most clinical trials must be submitted within specific timeframes to the
National Institutes of Health (“NIH”) to be publicly posted on the ClinicalTrials.gov website.

Human clinical trials are typically conducted in three sequential phases that may overlap or be combined.

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•

Phase 1 – The product candidate is initially introduced into healthy human subjects and tested for safety, dosage tolerance, absorption,
metabolism, distribution, and elimination. In the case of some product candidates for severe or life-threatening diseases, such as cancer,
especially when the product candidate may be inherently too toxic to ethically administer to healthy volunteers, the initial human testing is often
conducted in patients.

Phase 2 – Clinical trials are performed on a limited patient population intended to identify possible adverse effects and safety risks, to
preliminarily evaluate the efficacy of the product for specific targeted diseases and to determine dosage tolerance and optimal dosage.

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•

Phase 3 – Clinical trials are undertaken to further evaluate dosage, clinical efficacy, and safety in an expanded patient population at
geographically dispersed clinical study sites. These studies are intended to establish the overall risk-benefit ratio of the product and provide an
adequate basis for product labeling.

Human clinical trials are inherently uncertain, and Phase 1, Phase 2, and Phase 3 testing may not be successfully completed. The FDA, the sponsor, or

a data safety monitoring board, may suspend a clinical trial at any time for a variety of reasons, including a finding that the research subjects or patients are
being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the clinical trial is not
being conducted in accordance with the IRB’s requirements or if the product candidate has been associated with unexpected serious harm to patients.

During the development of a new product candidate, sponsors are given opportunities to meet with the FDA at certain points prior to the submission of
an IND, at the end of Phase 2, and before an NDA is submitted. Meetings at other times may be requested. These meetings can provide an opportunity for the
sponsor to share information about the data gathered to date and for the FDA to provide advice on the next phase of development. Sponsors typically use the
meeting at the end of Phase 2 to discuss their Phase 2 clinical results and present their plans for the pivotal Phase 3 clinical trial that they believe will support
the approval of an NDA. If a Phase 2 clinical trial is the subject of discussion at the end of Phase 2 meeting with the FDA, a sponsor may be able to request a
Special Protocol Assessment, the purpose of which is to reach agreement with the FDA on the Phase 3 clinical trial protocol design and analysis that will
form the primary basis of an efficacy claim. In the case of Breakthrough Therapy Designation, communication with the FDA may occur more frequently than
as outlined above.

Concurrent with clinical trials, sponsors usually complete additional animal safety studies and also develop additional information about the chemistry

and physical characteristics of the product candidate and finalize a process for manufacturing commercial quantities of the product candidate in accordance
with cGMP requirements. The manufacturing process must be capable of consistently producing quality batches of the product candidate and the
manufacturer must develop methods for testing the safety, identity, strength, purity, and quality of the product candidate. Additionally, appropriate packaging
must be selected and tested and stability studies must be conducted to demonstrate that the product candidate does not undergo unacceptable deterioration
over its proposed shelf-life. Before approving an NDA, the FDA will inspect the facility or facilities where the product is manufactured and tested and will
not approve the product unless cGMP compliance is satisfactory. The FDA will also typically inspect one or more clinical sites to assure compliance with
FDA regulations and GCP.

The results of product development, non-clinical studies and clinical trials, along with descriptions of the manufacturing process, analytical tests and
other control mechanisms, proposed labeling and other relevant information are submitted to the FDA as part of an NDA requesting approval to market the
product. The submission of an NDA is subject to the payment of user fees, but a waiver of such fees may be obtained under specified circumstances. The
FDA reviews all NDAs submitted to ensure that they are sufficiently complete for substantive review before it accepts them for filing. It may request
additional information rather than accept an NDA for filing. In this event, the NDA must be resubmitted with the additional information. The resubmitted
application also is subject to review before the FDA accepts it for filing.

Once the submission is accepted for filing, the FDA begins an in-depth review. The FDA reviews an NDA to determine, among other things, whether a

product is safe and effective for its intended use and whether its manufacturing is cGMP-compliant. The FDA typically requires that an NDA include data
from two adequate and well-controlled clinical trials, but approval may be based upon a single adequate and well-controlled clinical trial in certain
circumstances. The FDA may refuse to approve an NDA if the applicable regulatory criteria are not satisfied or may require additional clinical or other data.
Even if such data are submitted, the FDA may ultimately decide that the NDA does not satisfy the criteria for approval. The FDA may refer the NDA to an
advisory committee for review and recommendation as to whether the application should be approved and under what conditions. The FDA is not bound by
the recommendation of an advisory committee, but it generally follows such recommendations.

If a product receives regulatory approval, the approval may be significantly limited to specific diseases and dosages or the indications for use may
otherwise be limited, which could restrict the commercial value of the product. Further, the FDA may require that certain contraindications, warnings, or
precautions be included in the product labeling. In addition, the FDA may condition approval on the completion of post approval studies. Such studies may
involve clinical trials designed to further assess a product’s safety and effectiveness and may require testing and surveillance programs to monitor the safety
of approved products that have been commercialized. If the FDA determines that it is necessary to ensure the safe use of the drug, the FDA may also
condition approval on the implementation of a risk evaluation and mitigation strategy (“REMS”). The REMS could include medication guides, physician
communication plans, or elements to assure safe use, such as restricted distribution methods, patient registries, or other risk minimization tools.

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Expedited review and approval

The FDA has various programs, including Fast Track, priority review, breakthrough, and accelerated approval, which are intended to expedite or

simplify the process for reviewing product candidates. Generally, product candidates that are eligible for these programs are those for serious or life-
threatening conditions, those with the potential to address unmet medical needs and those that offer meaningful benefits over existing treatments. A sponsor
can request application of these programs either alone or in combination with each other, depending on the circumstances. Even if a product candidate
qualifies for one or more of these programs, the FDA may later decide that the product candidate no longer meets the conditions for qualification or that the
time period for FDA review or approval will be shortened. None of the expedited approval programs change the NDA approval standard applied to a product.

New drugs are eligible for Fast Track status if they are intended to treat a serious or life-threatening disease or condition and demonstrate the potential

to address unmet medical needs for the disease or condition. Fast Track status entitles such a drug to expedited review and frequent contact with the FDA
review division. Unlike other expedited review programs, Fast Track designation allows the FDA to accept for review individual sections of the NDA on a
rolling basis. The FDA may also grant a priority review designation to drugs that offer major advances in treatment or provide a treatment where no adequate
therapy exists. A priority review means that the goal for the FDA to review an application is six months from filing of an NDA, rather than the standard
review of ten months from filing under current Prescription Drug User Fee Act guidelines. Most products that are eligible for Fast Track designation are also
likely to be considered appropriate to receive a priority review.

Drug products studied for their safety and effectiveness in treating serious or life-threatening diseases or conditions may receive accelerated approval
upon a determination that the product has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit, or on a clinical endpoint that
can be measured earlier than irreversible morbidity or mortality, that is reasonably likely to predict an effect on irreversible morbidity or mortality or other
clinical benefit, taking into account the severity, rarity, or prevalence of the condition and the availability or lack of alternative treatments. As a condition of
approval, the FDA typically requires that a sponsor of a product candidate receiving accelerated approval conduct post-approval clinical trials. As an
additional condition of approval, the FDA currently requires pre-approval of all promotional materials, which could adversely impact the timing of the
commercial launch of the product.

The FDA may expedite the approval of a designated breakthrough therapy, which is a drug that is intended to treat a serious or life-threatening disease
or condition for which preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over existing therapies on one or more
clinically significant endpoints, such as substantial treatment effects observed early in clinical development. A sponsor may request that a drug be designated
as a breakthrough therapy at any time during the clinical development of the product. If the FDA designates a drug as a breakthrough therapy, the FDA must
take the appropriate steps to expedite the development and review of the application, which may include holding meetings with the sponsor and the review
team throughout the development of the drug; providing timely advice to the sponsor regarding the development of the drug to ensure that the development
program is as efficient as practicable; involving senior managers and experienced review staff, as appropriate, in a collaborative, cross-disciplinary review;
and taking steps to ensure that the design of the clinical trials is as efficient as practicable.

In December 2016, the 21st Century Cures Act (“Cures Act”), was signed into law. The Cures Act included numerous provisions that may be relevant
to our product candidates, including provisions designed to speed development of innovative and breakthrough therapies. The Cures Act amends the FDCA
and the Public Health Service Act, to reauthorize and expand funding for the NIH and to authorize the FDA to increase spending on innovation projects.
Central to the Cures Act are provisions that enhance and accelerate the FDA’s processes for reviewing and approving new drugs and supplements to approved
NDAs. The Cures Act also includes a provision that requires certain manufacturers or distributors of an investigational drug to make their policies on the
availability of certain expanded access programs publicly available. Because the Cures Act was enacted relatively recently and the FDA may take several
years to develop these policies, it is difficult to know the full extent of how the Cures Act will affect our business.

Patent term restoration and marketing exclusivity

Depending upon the timing, duration and specifics of FDA approval of the use of our product candidates, some of our U.S. patents may be eligible for
limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, referred to as the Hatch-Waxman Act. The Hatch-
Waxman Act permits a patent restoration term of up to five years as compensation for patent term lost during product development and the FDA regulatory
review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product candidate’s
approval date. The patent term restoration period is generally one half of the time between the effective date of an IND and the submission date of an NDA,
plus the time between the submission date of an NDA and the approval of that application. Only one patent applicable to an approved product candidate is
eligible for the extension and the application for extension must be made prior to expiration of the patent. The U.S. Patent and Trademark Office, in
consultation with the FDA, reviews and approves the application for any patent term extension or restoration. In the future, we intend to apply for restorations
of patent term for some of our currently owned or licensed patents to add

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patent life beyond their current expiration date, depending on the expected length of clinical trials and other factors involved in the submission of the relevant
NDA.

Market exclusivity provisions under the FDCA also can delay the submission or the approval of certain applications. The FDCA provides a five-year

period of non-patent marketing exclusivity within the U.S. to the first applicant to gain approval of an NDA for a new chemical entity. A product candidate is
a new chemical entity if the FDA has not previously approved any other new product candidate containing the same active moiety, which is the molecule or
ion responsible for the action of the product candidate substance. During the exclusivity period, the FDA may not accept for review an abbreviated new drug
application (“ANDA”) or a 505(b)(2) NDA (i.e., an NDA that contains full safety and effectiveness reports but allows at least some of the information
required for NDA approval to come from studies not conducted by or for the applicant) submitted by another company for another version of such product
candidate where the applicant does not own or have a legal right of reference to all the data required for approval. However, an application may be submitted
after four years if it contains a certification of patent invalidity or non-infringement. The FDCA also provides three years of marketing exclusivity for an
NDA, 505(b)(2) NDA or supplement to an approved NDA if new clinical investigations, other than bioavailability studies, that were conducted or sponsored
by the applicant are deemed by the FDA to be essential to the approval of the application, for example, for new indications, dosages or strengths of an
existing product candidate. This three-year exclusivity covers only the conditions associated with the new clinical investigations and does not prohibit the
FDA from approving ANDAs for product candidates containing the original active agent. Five-year and three-year exclusivity will not delay the submission
or approval of a full NDA. However, an applicant submitting a full NDA would be required to conduct or obtain a right of reference to all of the preclinical
studies and adequate and well-controlled clinical trials necessary to demonstrate safety and effectiveness.

Orphan drug designation

Under the Orphan Drug Act, the FDA may grant orphan drug designation to product candidates intended to treat a rare disease or condition, which is

generally a disease or condition that affects fewer than 200,000 individuals in the U.S. or more than 200,000 individuals in the U.S. and for which there is no
reasonable expectation that the cost of developing and making available in the U.S. a product candidate for this type of disease or condition will be recovered
from sales in the U.S. for that product candidate. Orphan drug designation must be requested before submitting an NDA. After the FDA grants orphan drug
designation, the identity of the therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Orphan drug designation does not convey any
advantage in or shorten the duration of the regulatory review and approval process.

If a product candidate that has orphan drug designation subsequently receives the first FDA approval for the disease for which it has such designation,

the product candidate is entitled to orphan product exclusivity, which means that the FDA may not approve any other applications including a full NDA to
market the same product candidate for the same indication, except in very limited circumstances, for seven years. Orphan drug exclusivity, however, could
also block the approval of one of our product candidates for seven years if a competitor obtains approval of the same product candidate as defined by the FDA
prior to us.

On August 8, 2017, the FDA Reauthorization Act of 2017 (“FDARA”) was enacted. FDARA, among other things, codified the FDA’s pre-existing

regulatory interpretation, to require that a drug sponsor demonstrate the clinical superiority of an orphan drug that is otherwise the same as a previously
approved drug for the same rare disease in order to receive orphan drug exclusivity. The new legislation reverses prior precedent holding that the Orphan
Drug Act unambiguously requires that the FDA recognize the orphan exclusivity period regardless of a showing of clinical superiority. The FDA may further
reevaluate the Orphan Drug Act, including the FDARA amendment, its regulations and policies. We do not know if, when, or how the FDA may change the
orphan drug regulations and policies in the future, and it is uncertain how any changes might affect our business. Depending on what changes the FDA may
make to its orphan drug regulations and policies, our business could be adversely impacted.

Pediatric exclusivity, pediatric use and rare pediatric disease priority review vouchers

Under the Best Pharmaceuticals for Children Act, certain product candidates may obtain an additional six months of exclusivity if the sponsor submits
information requested in writing by the FDA (a “Written Request”) relating to the use of the active moiety of the product candidate in children. The FDA may
not issue a Written Request for studies on unapproved or approved indications or where it determines that information relating to the use of a product
candidate in a pediatric population, or part of the pediatric population, may not produce health benefits in that population.

FDARA amended the FDCA to provide that a drug, for which an application has been submitted or approved pursuant to section 505(b)(2) or 505(j) of

the FDCA, will not be considered ineligible for approval or misbranded because the labeling of such drug omits a pediatric indication or other pediatric
labeling information when the omitted pediatric information is protected by patent or marketing exclusivity. FDARA further permits FDA to require specific
labeling for such products related to the omitted pediatric indication and information to, among other things, make clear that the omission of the information
is related to the exclusivity. We do not know if or how such changes to the pediatric exclusivity provisions might affect our business.

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In addition, the Pediatric Research Equity Act (“PREA”) requires a sponsor to conduct pediatric studies for most product candidates and biologics, for

a new active ingredient, new indication, new dosage form, new dosing regimen or new route of administration. Under PREA, original NDAs, biologics
license applications and supplements thereto must contain a pediatric assessment unless the sponsor has received a deferral or waiver. The required
assessment must assess the safety and effectiveness of the product candidate for the claimed indications in all relevant pediatric subpopulations and support
dosing and administration for each pediatric subpopulation for which the product candidate is safe and effective. The sponsor or the FDA may request a
deferral of pediatric studies for some or all of the pediatric subpopulations. A deferral may be granted for several reasons, including a finding that the product
candidate or biologic is ready for approval for use in adults before pediatric studies are complete or that additional safety or effectiveness data needs to be
collected before the pediatric studies begin. After April 2013, the FDA must send a noncompliance letter to any sponsor that fails to submit the required
assessment, keep a deferral current or fails to submit a request for approval of a pediatric formulation. PREA does not apply to any drug for an indication for
which orphan designation has been granted. However, if only one indication for a product has orphan designation, a pediatric assessment may still be required
for any applications to market that same product for the non-orphan indication(s).

Section 529 of the FDCA is intended to encourage development of new drug and biological products for prevention and treatment of certain rare

pediatric diseases. Although there are existing incentive programs to encourage the development and study of drugs for rare diseases, pediatric populations,
and unmet medical needs, section 529 provides an additional incentive for rare pediatric diseases, which may be used alone or in combination with other
incentive programs. “Rare pediatric disease” is defined as a disease that:

•

•

is “a serious or life-threatening disease in which the serious or life-threatening manifestations primarily affect individuals aged from birth to 18
years, including age groups often called neonates, infants, children, and adolescents”; and

is “a rare disease or condition” as defined in the FDCA, which includes diseases and conditions that affect fewer than 200,000 persons in the U.S.
and diseases and conditions that affect a larger number of persons and for which there is no reasonable expectation that the costs of developing
and making available the drug in the U.S. can be recovered from sales of the drug in the U.S.

Under section 529, the sponsor of a human drug application for a rare pediatric disease drug product may be eligible for a voucher that can be used (or
sold) to obtain a priority review for a subsequent human drug application submitted under section 505(b)(1) of the FDCA or section 351 of the Public Health
Service Act after the date of approval of the rare pediatric disease drug product. The rare pediatric disease priority review vouchers program was re-
authorized by Congress in the Cures Act, extending the program through 2020. The FDA has issued draft Guidance for Industry for Rare Pediatric Disease
Priority Review Vouchers.

Post-approval requirements

Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory requirements is not maintained or if problems occur

after the product candidate reaches the market. Requirements for additional Phase 4 trials (post-approval marketing studies) to confirm safety and efficacy
may be imposed as a condition of approval. Later discovery of previously unknown problems with a product candidate may result in REMS or even complete
withdrawal of the product candidate from the market. After approval, some types of changes to the approved product candidate, such as adding new
indications, manufacturing changes and additional labeling changes, are subject to further FDA review and approval. In addition, the FDA may require testing
and surveillance programs to monitor the effect of approved product candidates that have been commercialized, and the FDA has the power to prevent or
limit further marketing of a product candidate based on the results of these post-marketing programs.

Any product candidates manufactured or distributed by us pursuant to FDA approvals are subject to continuing regulation by the FDA, including,

among other things:

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record-keeping requirements;

reporting of adverse experiences with the product candidate;

submission of periodic reports;

providing the FDA with updated safety and efficacy information;

drug sampling, stability and distribution requirements;

notifying the FDA and gaining its approval of specified manufacturing or labeling changes; and

complying with statutory and regulatory requirements for promotion and advertising.

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Drug manufacturers and other entities involved in the manufacture and distribution of approved product candidates are required to register their
establishments and provide product listing information to the FDA and certain state agencies and are subject to periodic unannounced inspections by the FDA
and some state agencies for compliance with cGMP and other laws.

Regulation outside of the U.S.

In addition to regulations in the U.S., we will be subject to regulations of other jurisdictions governing any clinical trials and commercial sales and

distribution of our product candidates. Whether or not we obtain FDA approval for a product, we must obtain approval by the comparable regulatory
authorities of countries outside of the U.S. before we can commence clinical trials in such countries, and approval of the regulators of such countries or
supranational areas, such as the European Union (“EU”), before we may market products in those countries or areas. The approval process and requirements
governing the conduct of clinical trials, product licensing, pricing and reimbursement vary greatly from place to place, and the time may be longer or shorter
than that required for FDA approval.

Under EU regulatory systems, a company may submit marketing authorization applications either under a centralized or decentralized procedure. The
centralized procedure, which is compulsory for certain medicines, including those produced by biotechnology or those intended to treat HIV, AIDS, cancer,
neurodegenerative disorders, autoimmune and other immune dysfunctions, viral diseases or diabetes and is optional for those medicines which are a
significant therapeutic, scientific or technical innovation or whose authorization would be in the interest of public health, provides for the grant of a single
marketing authorization that is valid for all EU member states. Through the decentralized procedure, a medicinal product that has not yet been authorized in
the EU can be simultaneously authorized in several EU member states. The mutual recognition procedure provides for mutual recognition of national
approval decisions. Under this procedure, the holder of a national marketing authorization may submit an application to the remaining member states. Within
90 days of receiving the applications and assessment reports, each member state must decide whether to recognize the approval. If a member state does not
recognize the marketing authorization, the disputed points are eventually referred to the European Commission, whose decision is binding on all member
states.

As in the U.S., we may apply for designation of a product candidate as an orphan drug for the treatment of a specific indication in the EU before the

application for marketing authorization is made. Sponsors of orphan drugs in the EU can enjoy economic and marketing benefits, including up to 10 years of
market exclusivity for the approved indication. During such period, marketing authorization applications for “similar” medicinal products will not be
accepted, unless another applicant can show that its product is safer, more effective or otherwise clinically superior to the orphan-designated product. In the
EU, a “similar medicinal product” is a medicinal product containing a similar active substance or substances as contained in a currently authorized orphan
medicinal product, and which is intended for the same therapeutic indication.

Coverage and Reimbursement

In the U.S. and markets in other countries, patients who are prescribed treatments for their conditions and providers performing the prescribed services

generally rely only on third-party payors to reimburse all or part of the associated healthcare costs. Thus, sales of our products will depend, in part, on the
extent to which the costs of our products will be covered and paid for by third-party payors, such as government health programs, commercial insurance and
managed healthcare organizations. In the United States, no uniform policy of coverage and reimbursement for products exists among third-party payors.
Therefore, coverage and reimbursement for products can differ significantly from payor to payor. The process for determining whether a third-party payor
will provide coverage for a product may be separate from the process for setting the price or reimbursement rate that the payor will pay for the product once
coverage is approved. Third-party payors may limit coverage to specific products on an approved list or formulary, which might not include all of the FDA-
approved products for a particular indication. Also, third-party payors may refuse to include a particular branded drug on their formularies or otherwise
restrict patient access to a branded drug when a less costly generic equivalent or another alternative is available. Third-party payors are increasingly
challenging the prices charged for medical products and services, examining the medical necessity, and reviewing the cost-effectiveness of medical products
and services and imposing controls to manage costs.

In order to secure coverage and reimbursement for any product that might be approved for sale, a company may need to conduct expensive

pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effectiveness of the product, in addition to the costs required to obtain FDA
or other comparable regulatory approvals. Additionally, companies may also need to provide discounts to purchases, private health plans, or government
healthcare programs. Nonetheless, products may not be considered medically necessary or cost effective. A decision by a third-party payor not to cover a
product could reduce physician utilization once the product is approved and have a material adverse effect on sales, results of operations, and financial
condition. Additionally, a third-party payor’s decision to provide coverage for a product does not imply that an adequate reimbursement rate will be approved.
Further, one payor’s determination to provide coverage for a product does not assure that other payors will also provide coverage and reimbursement for the
product, and the level of coverage and reimbursement can differ significantly from payor to payor.

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Additionally, the containment of healthcare costs has become a priority of federal and state governments, and the prices of drugs have been a focus in

this effort. The U.S. government, state legislatures and foreign governments have shown significant interest in implementing cost-containment programs,
including price controls, restrictions on reimbursement and requirements for substitution of generic products. For example, the current U.S. administration has
indicated support for possible new measures to regulate drug pricing. Adoption of price controls and cost-containment measures, and adoption of more
restrictive policies in jurisdictions with existing controls and measures, could significantly limit our net revenue and financial results. If these third-party
payors do not consider our products to be cost-effective compared to other therapies, they may not cover our products after approved as a benefit under their
plans or, if they do, the level of payment may not be sufficient to allow us to sell our products on a profitable basis.

The Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (“MMA”) imposed new requirements for the distribution and pricing
of prescription drugs for Medicare beneficiaries. Under Part D, Medicare beneficiaries may enroll in prescription drug plans offered by private entities which
will provide coverage of outpatient prescription drugs. Part D plans include both stand-alone prescription drug benefit plans and prescription drug coverage as
a supplement to Medicare Advantage plans. Unlike Medicare Part A and B, Part D coverage is not standardized. Part D prescription drug plan sponsors are
not required to pay for all covered Part D drugs, and each drug plan can develop its own drug formulary that identifies which drugs it will cover and at what
tier or level. However, Part D prescription drug formularies must include drugs within each therapeutic category and class of covered Part D drugs, though
not necessarily all the drugs in each category or class. Any formulary used by a Part D prescription drug plan must be developed and reviewed by a pharmacy
and therapeutic committee. Government payment for some of the costs of prescription drugs may increase demand for our products for which we receive
marketing approval. However, any negotiated prices for our products covered by a Part D prescription drug plan will likely be lower than the prices we might
otherwise obtain. Moreover, while the MMA applies only to drug benefits for Medicare beneficiaries, private payors often follow Medicare coverage policy
and payment limitations in setting their own payment rates. Any reduction in payment that results from the MMA may result in a similar reduction in
payments from non-governmental payors.

The Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation Act of 2010, collectively

referred to as the ACA, enacted in March 2010, has had a significant impact on the health care industry by, for example, expanding coverage for the
uninsured and seeking to contain overall healthcare costs. Regarding pharmaceutical products, among other things, the ACA contains provisions of
importance to our potential product candidates, including among other things, provisions that:

•

•

•

•

•

•

created an annual, nondeductible fee on any entity that manufactures or imports specified branded prescription drugs and biologic products,
apportioned among these entities according to their market share in certain government healthcare programs;

expanded eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid coverage to certain individuals with
income at or below 133% of the federal poverty level, thereby potentially increasing a manufacturer’s Medicaid rebate liability;

expanded manufacturers’ rebate liability under the Medicaid Drug Rebate Program by increasing the minimum rebate for both branded and generic
drugs and revising the definition of average manufacturer price (“AMP”) for calculating and reporting Medicaid drug rebates on outpatient
prescription drug prices;

addressed a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are
inhaled, infused, instilled, implanted, or injected;

expanded the types of entities eligible for the 340B drug discount program; and

created a new Patient-Centered Outcomes Research Institute to oversee, identify priorities in, and conduct comparative clinical effectiveness
research, along with funding for such research.

Recently, the current U.S. administration and U.S. Congress have expressed a desire to modify, repeal, or otherwise invalidate all, or certain provisions
of, the ACA, which has contributed to the uncertainty of the ongoing implementation and impact of the ACA and also underscores the potential for additional
health care reform going forward. For example, the Tax Cuts and Jobs Act of 2017 includes a provision effective January 1, 2019, repealing the tax-based
shared responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health coverage for all or part of a year that is
commonly referred to as the “individual mandate.” On December 14, 2018, a Texas U.S. District Court judge ruled that the ACA is unconstitutional in its
entirety because the “individual mandate” was repealed by Congress as part of the Tax Cuts and Jobs Act of 2017. On December 18, 2019, the Fifth Circuit
U.S. Court of Appeals held that the individual mandate is unconstitutional, and remanded the case to the lower court to reconsider its earlier invalidation of
the full ACA. Congress may consider other legislation that would alter other aspects of the ACA.

There is still uncertainty with respect to the impact the current U.S. administration, the U.S. Congress, and the courts may have, if any, and any

changes will likely take time to unfold. Such reforms could have an adverse effect on anticipated revenues from

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product candidates that we may successfully develop and for which we may obtain regulatory approval and may affect our overall financial condition and
ability to develop product candidates.

Further legislation or regulation could be passed that could harm our business, financial condition and results of operations. Other legislative changes

have been proposed and adopted since the ACA was enacted. For example, in August 2011, President Obama signed into law the Budget Control Act of 2011,
which, among other things, created the Joint Select Committee on Deficit Reduction to recommend to Congress proposals in spending reductions. The Joint
Select Committee on Deficit Reduction did not achieve a targeted deficit reduction of at least $1.2 trillion for fiscal years 2012 through 2021, triggering the
legislation’s automatic reduction to several government programs. This includes aggregate reductions to Medicare payments to providers of up to 2% per
fiscal year, which went into effect beginning on April 1, 2013 and will stay in effect through 2027 unless additional Congressional action is taken. In addition,
on February 9, 2018, Congress passed the Bipartisan Budget Act that made several healthcare reforms. For example, the law changes the discounts
manufacturers are required to apply to their drugs under the Coverage Gap Discount Program from 50% to 70% of the negotiated price starting in 2019. In
addition, the law increases civil and criminal penalties for fraud and abuse laws, including, for example, increases in both criminal fines for violations of the
Anti-Kickback Statute and corresponding prison sentences.

 Also, there has been heightened governmental scrutiny recently over the manner in which drug manufacturers set prices for their marketed products,

which have resulted in several Congressional inquiries and proposed bills designed to, among other things, bring more transparency to product pricing, review
the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for drug products. For
example, on September 25, 2019, the Senate Finance Committee introduced the Prescription Drug Pricing Reduction Action of 2019, a bill intended to reduce
Medicare and Medicaid prescription drug prices. The proposed legislation would restructure the Part D benefit, modify payment methodologies for certain
drugs, and impose an inflation cap on drug price increases. An even more restrictive bill, the Lower Drugs Costs Now Act of 2019 has passed out of the
House and was delivered to the Senate on December 16, 2019, and would require Department of Health and Human Services (“HHS”) to directly negotiate
drug prices with manufacturers. It is unclear whether either of these bills will make it through both chambers and be signed into law, and if either is enacted,
what effect it would have on our business. Individual states in the United States have also become increasingly aggressive in passing legislation and
implementing regulations designed to control pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts,
restrictions on certain product access and marketing cost disclosure and transparency measures. For example, in September 2017, the California State
Assembly approved SB17 which requires pharmaceutical companies to notify health insurers and government health plans at least 60 days before certain
scheduled increases in the prices of their products, and further requiring pharmaceutical companies to explain the reasons for such increases. Effective in
2016, Vermont passed a law requiring a certain manufacturer identified by the state to justify their price increases.

In addition, in some non-U.S. jurisdictions, the proposed pricing for a product candidate must be approved before it may be lawfully marketed. The

requirements governing drug pricing vary widely from country to country. For example, the EU provides options for its member states to restrict the range of
medicinal products for which their national health insurance systems provide reimbursement and to control the prices of medicinal products for human use. A
member state may approve a specific price for the medicinal product or it may instead adopt a system of direct or indirect controls on the profitability of the
company placing the medicinal product on the market. There can be no assurance that any country that has price controls and/or reimbursement limitations
for pharmaceutical products will allow favorable reimbursement and pricing arrangements for any of our product candidates. Historically, product candidates
launched in the EU do not follow price structures of the U.S. and generally tend to have price structures that are significantly lower.

Other Healthcare Fraud and Laws

In the U.S., our activities are potentially subject to regulation by various federal, state and local authorities in addition to the FDA, including but not

limited to, the Centers for Medicare and Medicaid Services (“CMS”), other divisions of the HHS (such as the Office of Inspector General and the Health
Resources and Service Administration), the U.S. Department of Justice (the “DOJ”) and individual U.S. Attorney offices within the DOJ, and state and local
governments. For example, sales, marketing and scientific/educational grant programs may have to comply with the anti-fraud and abuse provisions of the
Social Security Act, the false claims laws, the privacy and security provisions of the Health Insurance Portability and Accountability Act (“HIPAA”) and
similar state laws, each as amended, as applicable.

The federal Anti-Kickback Statute prohibits, among other things, any person or entity, from knowingly and willfully offering, paying, soliciting or

receiving any remuneration, directly or indirectly, overtly or covertly, in cash or in kind, to induce or in return for purchasing, leasing, ordering or arranging
for the purchase, lease or order of any item or service reimbursable, in whole or in part, under Medicare, Medicaid or other federal healthcare programs. The
term remuneration has been interpreted broadly to include anything of value. The Anti-Kickback Statute has been interpreted to apply to arrangements
between therapeutic product manufacturers on one hand and prescribers, purchasers, and formulary managers on the other. There are a number of statutory

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exceptions and regulatory safe harbors protecting some common activities from prosecution. The exceptions and safe harbors are drawn narrowly and
practices that involve remuneration that may be alleged to be intended to induce prescribing, purchasing or recommending may be subject to scrutiny if they
do not qualify for an exception or safe harbor. Failure to meet all of the requirements of a particular applicable statutory exception or regulatory safe harbor
does not make the conduct per se illegal under the Anti-Kickback Statute. Instead, the legality of the arrangement will be evaluated on a case-by-case basis
based on a cumulative review of all of its facts and circumstances. Additionally, the intent standard under the Anti-Kickback Statute was amended by the
ACA to a stricter standard such that a person or entity no longer needs to have actual knowledge of the statute or specific intent to violate it in order to have
committed a violation. In addition, the ACA codified case law that a claim including items or services resulting from a violation of the federal Anti-Kickback
Statute constitutes a false or fraudulent claim for purposes of the federal False Claims Act (the “FCA”) (discussed below).

The federal false claims and civil monetary penalty laws, including the FCA, which imposes significant penalties and can be enforced by private

citizens through civil qui tam actions, prohibit any person or entity from, among other things, knowingly presenting, or causing to be presented, a false or
fraudulent claim for payment to, or approval by, the federal healthcare programs, including Medicare and Medicaid, or knowingly making, using, or causing
to be made or used a false record or statement material to a false or fraudulent claim to the federal government. A claim includes “any request or demand” for
money or property presented to the U.S. government. Manufacturers can be held liable under the FCA even when they do not submit claims directly to
government payors if they are deemed to “cause” the submission of false or fraudulent claims.

HIPAA created additional federal criminal statutes that prohibit, among other things, knowingly and willfully executing, or attempting to execute, a

scheme to defraud or to obtain, by means of false or fraudulent pretenses, representations or promises, any money or property owned by, or under the control
or custody of, any healthcare benefit program, including private third-party payors, willfully obstructing a criminal investigation of a healthcare offense, and
knowingly and willfully falsifying, concealing or covering up by trick, scheme or device, a material fact or making any materially false, fictitious or
fraudulent statement in connection with the delivery of or payment for healthcare benefits, items or services. Like the Anti-Kickback Statute, the ACA
amended the intent standard for certain healthcare fraud statutes under HIPAA such that a person or entity no longer needs to have actual knowledge of the
statute or specific intent to violate it in order to have committed a violation.

Also, many states have similar, and typically more prohibitive, fraud and abuse statutes or regulations that apply to items and services reimbursed
under Medicaid and other state programs, or, in several states, apply regardless of the payor. Additionally, to the extent that our product candidates may in the
future be sold in a foreign country, we may be subject to similar foreign laws.

We may be subject to data privacy and security regulations by both the federal government and the states in which we conduct our business. HIPAA, as
amended by the Health Information Technology for Economic and Clinical Health Act (“HITECH”) and its implementing regulations, imposes requirements
relating to the privacy, security and transmission of individually identifiable health information. Among other things, HITECH makes HIPAA’s privacy and
security standards directly applicable to business associates, independent contractors, or agents of covered entities that receive or obtain protected health
information in connection with providing a service on behalf of a covered entity. HITECH also created four new tiers of civil monetary penalties, amended
HIPAA to make civil and criminal penalties directly applicable to business associates, and gave state attorneys general new authority to file civil actions for
damages or injunctions in federal courts to enforce HIPAA and seek attorneys’ fees and costs associated with pursuing federal civil actions. In addition, many
state laws govern the privacy and security of health information in specified circumstances, many of which differ from each other in significant ways, are
often not preempted by HIPAA, and may have a more prohibitive effect than HIPAA, thus complicating compliance efforts. Additionally, more general
personal privacy laws have also been enacted by various States and by other countries where we do business, such as member countries of the European
Union, that require adoption of policies and procedures to protect, properly store, and to obtain permission to use in our business and clinical research.

For example, in California, the California Consumer Protection Act (“CCPA”), which went into effect on January 1, 2020, established a new privacy

framework for covered businesses by creating an expanded definition of personal information, establishing new data privacy rights for consumers in the State
of California, imposing special rules on the collection of consumer data from minors, and creating a new and potentially severe statutory damages framework
for violations of the CCPA and for businesses that fail to implement reasonable security procedures and practices to prevent data breaches. While clinical trial
data and information governed by HIPAA are currently exempt from the current version of the CCPA, other personal information may be applicable and
possible changes to the CCPA may broaden its scope. The collection and use of personal health information in the European Union is governed by the
provisions of the Data Protection Directive, and as of May 25, 2018, the General Data Protection Regulation (“GDPR”). This directive imposes several
requirements relating to the consent of the individuals to whom the personal data relates, the information provided to the individuals, notification of data
processing obligations to the competent national data protection authorities, and the security and confidentiality of the personal data. The GDPR also imposes
strict rules on the transfer of personal data out of the EU to the United States. Failure to comply with the requirements of the Data Protection Directive (which
governs the collection and use of personal health data in the EU), the GDPR, and the related national data protection laws of the EU member states may result
in fines and other administrative penalties. The GDPR introduced new data protection requirements in the EU and substantial fines for

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breaches of the data protection rules. This may be onerous and may adversely affect our business, financial condition, results of operations, and prospects.

Failure to comply could result in penalties and interruption of our business should a violation occur.

We expect our product candidates, once approved, may be eligible for coverage under Medicare, the federal health care program that provides health

care benefits to the aged and disabled, and covers outpatient services and supplies, including certain pharmaceutical products, that are medically necessary to
treat a beneficiary’s health condition. In addition, our product candidates may be covered and reimbursed under other government programs, such as
Medicaid and the 340B Drug Pricing Program. The Medicaid Drug Rebate Program requires pharmaceutical manufacturers to enter into and have in effect a
national rebate agreement with the Secretary of the Department of Health and Human Services as a condition for states to receive federal matching funds for
the manufacturer’s outpatient drugs furnished to Medicaid patients. Under the 340B Drug Pricing Program, the manufacturer must extend discounts to entities
that participate in the program. As part of the requirements to participate in certain government programs, many pharmaceutical manufacturers must calculate
and report certain price reporting metrics to the government, such as average manufacturer price, or AMP, and best price. Penalties may apply in some cases
when such metrics are not submitted accurately and timely.

Additionally, the federal Physician Payments Sunshine Act (the “Sunshine Act”), within the ACA, and its implementing regulations, require that

certain manufacturers of drugs, devices, biological and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health
Insurance Program (with certain exceptions) report annually to CMS information related to certain payments or other transfers of value made or distributed to
physicians and teaching hospitals, or to entities or individuals at the request of, or designated on behalf of, the physicians and teaching hospitals and to report
annually certain ownership and investment interests held by physicians and their immediate family members. Failure to report accurately could result in
penalties. In addition, many states also govern the reporting of payments or other transfers of value, many of which differ from each other in significant ways,
are often not preempted, and may have a more prohibitive effect than the Sunshine Act, thus further complicating compliance efforts.

Environment

Our third-party manufacturers are subject to inspections by the FDA for compliance with cGMP and other U.S. regulatory requirements, including U.S.

federal, state, and local regulations regarding environmental protection and hazardous and controlled substance controls, among others. Environmental laws
and regulations are complex, change frequently, and have tended to become more stringent over time. We have incurred, and may continue to incur,
significant expenditures to ensure we are in compliance with these laws and regulations. We would be subject to significant penalties for failure to comply
with these laws and regulations.

Employees

As of December 31, 2019, we had 187 full-time employees, of whom 138 are engaged in research and development and 49 in administration. None of

our employees are represented by a labor union or covered by a collective bargaining agreement. Geographically, 154 of our employees are located in
Massachusetts, 25 in Colorado, and one each in Connecticut, Maryland, New Jersey, New York, North Carolina, and Wisconsin, United States. Two of our
employees are located in Germany.

Corporate Information

We were incorporated in Delaware in 2006. We maintain our executive offices at 33 Hayden Avenue, Lexington, MA 02421, and our main telephone

number is (617) 621-8097. Our website is located at www.dicerna.com, which contains information about us. The information in, or that can be accessed
through, our website is not part of this Annual Report on Form 10-K. Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, and Current
Reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act are available, free of charge,
on or through our website as soon as reasonably practicable after such reports and amendments are electronically filed with or furnished to the SEC. The SEC
maintains an Internet site that contains reports, proxy and information statements, and other information regarding our filings at www.sec.gov.

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ITEM 1A.

RISK FACTORS

We are providing the following cautionary discussion of risk factors, uncertainties, and assumptions that we believe are relevant to our business. These

are factors that we believe, individually or in the aggregate, could cause our actual results to differ materially from expected and historical results and our
forward-looking statements. We note these factors for investors as permitted by Section 21E of the Securities Exchange Act of 1934, as amended, and
Section 27A of the Securities Act of 1933, as amended. You should understand that it is not possible to predict or identify all such factors. Consequently, you
should not consider this section to be a complete discussion of all potential risks or uncertainties that may substantially impact our business. Moreover, we
operate in a competitive and rapidly changing environment. New factors emerge from time to time, and it is not possible to predict the impact of all these
factors on our business, financial condition, or results of operations.

Risks Related to Our Business

We will need to raise substantial additional funds to advance development of our product candidates and we cannot guarantee that we will have sufficient
funds available in the future to develop and commercialize our current or future product candidates. Raising additional funds may cause dilution to our
stockholders, restrict our operations, or require us to relinquish control over our technologies or product candidates.

We will need to raise substantial additional funds to expand our development, regulatory, manufacturing, marketing, sales, and general and

administrative operations capabilities, whether internally or through other organizations. We have used substantial funds to develop our product candidates
and delivery technologies and will require significant funds to conduct further research and development and preclinical testing and clinical trials of our
product candidates, to seek regulatory approvals for our product candidates, and to manufacture and market products, if any are approved for commercial
sale. As of December 31, 2019, we had $348.9 million in cash, cash equivalents, and held-to-maturity investments. Based on our current operating plan and
liquidity, we believe that our available cash, cash equivalents, and held-to-maturity investments, together with the $200.0 million upfront payment received
from F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (together, “Roche”) and the $175.0 million upfront payment received from our recently
announced agreement with Novo Nordisk A/S (“Novo”) in January 2020, will be sufficient to fund the execution of our current clinical and operating plan
into 2023. However, to the extent our clinical and operating plan changes, we will need to raise substantial additional funds. Further, our future capital
requirements and the period for which our existing resources are able to support our operations may vary significantly from what we expect. Our monthly
spending levels vary based on new and ongoing development and corporate activities. Because the length of time and activities associated with successful
development of our product candidates is highly uncertain, we are unable to estimate the actual funds we will require for development and any approved
marketing and commercialization activities. To execute our business plan, we will need, among other things:

•
candidates;

to obtain the human and financial resources necessary to develop, test, obtain regulatory approval for, manufacture, and market our product

•

•

•

•

to build and maintain a strong intellectual property portfolio and avoid infringing intellectual property of third parties;

to establish and maintain successful licenses, collaborations, and alliances;

to satisfy the requirements of clinical trial protocols, including patient enrollment;

to establish and demonstrate the clinical efficacy and safety of our product candidates;

•
and commercialization;

to manage our spending as costs and expenses increase due to preclinical studies and clinical trials, regulatory approvals, manufacturing scale-up,

•

•

•

to obtain additional capital to support and expand our operations;

to satisfy the requirements for quality and safety in developing and commercializing our products; and

to market our products to achieve acceptance and use by the medical community.

If we are unable to obtain funding on a timely basis or on acceptable terms, we may have to delay, reduce, or terminate our research and development

programs and preclinical studies or clinical trials, if any, delay or cease our efforts to build our commercial capabilities, limit strategic opportunities, or
undergo reductions in our workforce or other corporate restructuring activities. We also could be required to seek funds through arrangements with
collaborators or others that may require us to relinquish development or commercialization rights to some of our technologies or product candidates that we
would otherwise pursue on our own. We do not expect to realize revenue from product sales or royalties in the near-term future, if at all, and milestone
payments, if any, are based on third-party determinations and/or events outside our control. Our revenue sources currently are, and will remain, limited unless
and until our product candidates are clinically tested, approved for commercialization, and successfully marketed. To date, we have financed our operations
primarily through the sale of securities, research collaborations and license agreements, debt financings, and

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credit and loan facilities. We will be required to seek additional funding in the future and intend to do so through a combination of public or private equity
offerings, debt financings, and research collaborations and license agreements. Our ability to raise additional funds will depend on financial, economic, and
other factors, many of which are beyond our control. For example, a number of factors, including the timing and outcomes of our clinical activities, as well as
conditions in the global financial markets, may present significant challenges to accessing the capital markets at a time when we would like or require, and at
an increased cost of capital. Additional funds may not be available to us on acceptable terms or at all. If we raise additional funds by issuing equity securities,
our stockholders will suffer dilution, and the terms of any financing may adversely affect the rights of our stockholders. In addition, as a condition to
providing additional funds to us, future investors may demand, and may be granted, rights superior to those of existing stockholders. Debt financing, if
available, may involve restrictive covenants limiting our flexibility in conducting future business activities, and, in the event of insolvency, debt holders
would be repaid before holders of equity securities receive any distribution of corporate assets.

We have a history of operating losses; we expect to continue to incur significant losses for the foreseeable future and may never achieve or maintain
profitability, which could result in a decline in the market value of our common stock.

We are a biopharmaceutical company with a limited operating history focused on the discovery and development of treatments based on the emerging
therapeutic modality RNAi, a biological process in which RNA molecules inhibit gene expression. Since our inception in October 2006, we have devoted our
resources to the development of RNAi molecules and delivery technologies. We have had significant operating losses since our inception. As of
December 31, 2019, we had an accumulated deficit of $525.3 million. For the years ended December 31, 2019, 2018, and 2017, our net loss attributable to
common stockholders was $120.5 million, $88.9 million, and $80.3 million, respectively. Substantially all of our operating losses have resulted from expenses
incurred in connection with our research and development programs, from general and administrative costs associated with our operations, and, prior to 2019,
litigation expenses associated with the Alnylam Pharmaceuticals, Inc. (“Alnylam”) litigation settled in April 2018. Our technologies and product candidates
are in early stages of development, and we are subject to the risks of failure inherent in the development of product candidates based on novel technologies.

We have not generated, and do not expect to generate, any revenue from product sales for the near-term future, and we expect to continue to incur

significant operating losses for the foreseeable future due to the cost of research and development, preclinical studies and clinical trials, and the regulatory
approval process for product candidates. The amount of future losses is uncertain. Our ability to achieve profitability, if ever, will depend on, among other
things, us or our existing collaborators, or any future collaborators, successfully developing product candidates, obtaining regulatory approvals to market and
commercialize product candidates, manufacturing any approved products on commercially reasonable terms, establishing a sales and marketing organization
or suitable third-party alternatives for any approved product, and raising sufficient funds to finance business activities. If we or our existing collaborators, or
any future collaborators, are unable to develop and commercialize one or more of our product candidates or if sales revenue from any product candidate that
receives approval is insufficient, we will not achieve profitability, which could have a material adverse effect on our business, financial condition, results of
operations, and prospects.

Our quarterly operating results may fluctuate significantly or may fall below the expectations of investors or securities analysts, each of which may cause
our stock price to fluctuate or decline.

We expect our operating results to be subject to quarterly fluctuations. Our net loss and other operating results will be affected by numerous factors,

including:

•

variations in the level of expense related to our product candidates or future development programs;

•
support by us, our existing collaborators, or any future collaborator or licensor;

delays in enrolling subjects in, initiating, conducting, or releasing results of clinical trials, or the addition or termination of clinical trials or funding

•

the timing of the release of results from any clinical trials conducted by us or our collaborators or licensors;

•
future arrangements or the termination or modification of any such existing or future arrangements;

our execution of any collaboration, licensing, or similar arrangement, and the timing of payments we may make or receive under such existing or

•
review, nullification, derivation action, or cancellation proceeding in which we may become involved;

any intellectual property infringement or misappropriation lawsuit or opposition, interference, re-examination, post-grant review, inter partes

•

additions and departures of key personnel;

•
business strategy;

strategic decisions by us and our competitors, such as acquisitions, divestitures, spin-offs, joint ventures, strategic investments, or changes in

•

if any of our product candidates receive regulatory approval, market acceptance and demand for such product candidates;

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•
perform in accordance with current good manufacturing practices (“cGMP”);

delays in engagement of our third-party manufacturers for our product candidates or their failure to execute on our manufacturing requirements or

•

timing of regulatory decisions and regulatory developments affecting our product candidates or those of our competitors;

•
royalties or require us to make significant payments arising from licenses, settlements, adverse judgments, or ongoing royalties;

disputes concerning patents, proprietary rights, or license and collaboration agreements that negatively impact our receipt of milestone payments or

•

•

changes in general market and economic conditions; and

changes in tax laws.

If our quarterly operating results fluctuate or fall below the expectations of investors or securities analysts, the price of our common stock could
fluctuate or decline substantially. We believe that quarterly comparisons of our financial results are not necessarily meaningful and should not be relied upon
as an indication of our future performance.

Our approach to the discovery and development of innovative therapeutic treatments based on novel technologies is unproven and may not result in
marketable products.

We plan to develop subcutaneously delivered RNAi-based pharmaceuticals using our GalXC RNAi platform for the treatment of rare diseases
involving the liver and for other therapeutic areas involving the liver such as chronic liver diseases, as well as cardiometabolic diseases and viral infectious
diseases. We believe that product candidates identified with our drug discovery and delivery platform may offer an improved therapeutic approach to small
molecules and monoclonal antibodies, as well as several advantages over earlier generation RNAi molecules. However, the scientific research that forms the
basis of our efforts to develop product candidates is relatively new. The scientific evidence to support the feasibility of developing therapeutic treatments
based on RNAi and GalXC is both preliminary and limited.

Relatively few product candidates based on RNAi have been tested in animals or humans, and a number of clinical trials conducted by other companies

using RNAi technologies have not been successful. We may discover that GalXC does not possess certain properties required for a drug to be safe and
effective, such as the ability to remain stable in the human body for the period of time required for the drug to reach the target tissue or the ability to cross the
cell wall and enter into cells within the target tissue for effective delivery. We currently have only limited data, and no conclusive evidence, to suggest that we
can introduce these necessary drug-like properties into GalXC. We may spend substantial funds attempting to introduce these properties and may never
succeed in doing so. In addition, product candidates based on GalXC may demonstrate different chemical and pharmacological properties in patients than
they do in laboratory studies. Even if product candidates, such as nedosiran (formerly DCR-PHXC), RG6346 (formerly DCR-HBVS), and DCR-A1AT, have
successful results in animal studies, they may not demonstrate the same chemical and pharmacological properties in humans and may interact with human
biological systems in unforeseen, ineffective, or harmful ways. As a result, we may never succeed in developing a marketable product, we may not become
profitable, and the value of our common stock will decline.

Further, the United States (“U.S.”) Food and Drug Administration (“FDA”) has relatively limited experience with RNAi or GalXC-based therapeutics.
We and our current collaborators, or any future collaborators, may never receive approval to market and commercialize any product candidate. Even if we or
a collaborator obtain regulatory approval, the approval may be for disease indications or patient populations that are not as broad as we intended or desired or
may require labeling that includes significant use or distribution restrictions or safety warnings. We or a collaborator may be required to perform additional or
unanticipated clinical trials to obtain approval or be subject to post-marketing testing requirements to maintain regulatory approval. If our technologies based
on GalXC prove to be ineffective, unsafe, or commercially unviable, our entire platform and pipeline would have little, if any, value, which would have a
material adverse effect on our business, financial condition, results of operations, and prospects.

The market may not be receptive to our product candidates based on a novel therapeutic modality, and we may not generate any future revenue from the
sale or licensing of product candidates.

Even if approval is obtained for a product candidate, we may not generate or sustain revenue from sales of the product due to numerous factors,
including whether the product can be sold at a competitive price and otherwise is accepted in the market. The product candidates that we are developing are
based on new technologies and therapeutic approaches. Market participants with significant influence over acceptance of new treatments, such as physicians
and third-party payors, may not adopt a treatment based on GalXC technology, and we may not be able to convince the medical community and third-party
payors, including health insurers, to accept and use, or to provide favorable coverage of or reimbursement for, any product candidates developed by us or our
existing collaborator or any future collaborators. Market acceptance of our product candidates will depend on, among other factors:
•

the timing of our receipt of any marketing and commercialization approvals and those of our competitors;

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•

•

•

•

•

•

•

•

the terms of any approvals and the countries in which approvals are obtained;

the safety and efficacy of our product candidates;

the prevalence and severity of any adverse side effects associated with our product candidates;

limitations or warnings contained in any labeling approved by the FDA or other regulatory authority;

relative convenience and ease of administration of our product candidates;

the willingness of physicians and patients to accept any new methods of administration;

the success of our physician education programs;

the availability of adequate government and third-party payor coverage and reimbursement;

•
or organizations regarding our products;

the pricing of our products, particularly as compared to alternative treatments and the recommendations of public or private pricing review agencies

•

our ability to market and sell our products in compliance with applicable law; and

•
and costs of those treatments.

availability of alternative effective treatments for the disease indications our product candidates are intended to treat and the relative risks, benefits,

With our focus on the emerging therapeutic modality RNAi, these risks may increase to the extent the market becomes more competitive or less
favorable to this approach. Additional risks apply to any disease indications we pursue which are for rare diseases. Because of the small patient population for
a rare disease, if pricing is not approved or accepted in the market at an appropriate level for an approved rare disease product, such drug may not generate
enough revenue to offset costs of development, manufacturing, marketing, and commercialization, despite any benefits received from our efforts to obtain
orphan drug designation by regulatory agencies in major commercial markets, such as the U.S., the European Union (“EU”), and Japan. These benefits may
include market exclusivity, assistance in clinical trial design, or a reduction in user fees or tax credits related to development expense. Market size is also a
variable in disease indications that are not classified as rare. Our estimates regarding potential market size for any indication may be materially different from
what we discover to exist if we ever get to the point of product commercialization, which could result in significant changes in our business plan and have a
material adverse effect on our business, financial condition, results of operations, and prospects.

If a product candidate that has orphan drug designation subsequently receives the first FDA approval for the indication for that designation, the product

candidate is entitled to orphan product exclusivity, which means that the FDA may not approve any other applications to market the same drug for the same
indication, except in very limited circumstances, for seven years. Orphan drug exclusivity, however, could also block the approval of one of our product
candidates for seven years if a competitor obtains approval of the same drug for the same indication as defined by the FDA.

Even if we, or any future collaborators, obtain orphan drug exclusivity for a product, that exclusivity may not effectively protect the product from

competition because different drugs can be approved for the same condition. Even after an orphan drug is approved, the FDA can subsequently approve the
same drug for the same condition if the FDA concludes that the later drug is clinically superior in that it is shown to be safer, more effective, or makes a major
contribution to patient care.

On August 3, 2017, the Congress passed the FDA Reauthorization Act of 2017 (“FDARA”). FDARA, among other things, codified the FDA’s

preexisting regulatory interpretation, to require that a drug sponsor demonstrate the clinical superiority of an orphan drug that is otherwise the same as a
previously approved drug for the same rare disease in order to receive orphan drug exclusivity. The law reverses prior precedent holding that the Orphan Drug
Act unambiguously requires that the FDA recognize the orphan exclusivity period regardless of a showing of clinical superiority. The FDA may further
reevaluate the Orphan Drug Act and its regulations and policies. We do not know if, when, or how the FDA may change the orphan drug regulations and
policies in the future, and it is uncertain how any changes might affect our business. Depending on what changes the FDA may make to its orphan drug
regulations and policies, our business could be adversely impacted.

As in the U.S., we may apply for designation of a product candidate as an orphan drug for the treatment of a specific indication in the EU before the

application for marketing authorization is made. For example, in August 2018, the European Medicines Agency (“EMA”)’s Committee for Orphan Medicinal
Products (“COMP”) designated nedosiran (formerly DCR-PHXC) as an orphan medicinal product for the treatment of PH in the EU. In December 2019, the
European Commission granted orphan drug designation to DCR-A1AT for the treatment of congenital A1AT deficiency based on a positive opinion from the
COMP of the EMA. Sponsors of orphan drugs in the EU can enjoy economic and marketing benefits, including up to 10 years of market exclusivity for the
approved indication. During such period, marketing authorization applications for a “similar medicinal product” will not be accepted, unless another applicant
can show that its product is safer, more effective, or otherwise clinically superior to the orphan-designated product. In the EU, a “similar medicinal product”
is a medicinal product containing a similar active substance or substances as contained in a

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currently authorized orphan medicinal product, and which is intended for the same therapeutic indication. The respective orphan designation and exclusivity
frameworks in the U.S. and in the EU are subject to change, and any such changes may affect our ability to obtain U.S. or EU orphan designations in the
future.

Our product candidates are in varied stages of development, including some in early stages, and may fail or suffer delays that materially and adversely
affect their commercial viability.

We currently have no products on the market and our product candidates are in varied stages of development. Our ability to achieve and sustain
profitability depends on obtaining regulatory approvals, including ethics committee approval, to conduct clinical trials at particular sites, successfully
completing our clinical trials, and successfully commercializing our product candidates, either alone or with third parties, such as our collaborators. Before
obtaining regulatory approval for the commercial distribution of our product candidates, we or a collaborator must conduct extensive preclinical tests and
clinical trials to demonstrate the safety and efficacy of our product candidates in humans. Preclinical testing and clinical trials are expensive, difficult to
design and implement, can take many years to complete, and are uncertain as to outcome. The start or end of a clinical study is often delayed or halted due to
changing regulatory requirements, manufacturing challenges, required clinical trial administrative actions, slower than anticipated patient enrollment,
changing standards of care, availability or prevalence of use of a comparative drug or required prior therapy, clinical outcomes, and financial constraints. For
instance, delays or difficulties in patient enrollment or difficulties in retaining trial participants can result in increased costs, longer development times, or
termination of a clinical trial. Clinical trials of a new product candidate require the enrollment of a sufficient number of patients, including patients who are
suffering from the disease the product candidate is intended to treat and who meet other eligibility criteria. Rates of patient enrollment are affected by many
factors, including the size of the patient population, the eligibility criteria for the clinical trial, the age and condition of the patients, the stage and severity of
disease, the nature of the protocol, the proximity of patients to clinical sites, and the availability of effective treatments for the relevant disease. Thus,
enrollment of sufficient patients can be challenging for rare disease drug development programs where patient populations are inherently small in size,
particularly when there are competitive clinical trials.

A product candidate can unexpectedly fail at any stage of preclinical and clinical development. The historical failure rate for product candidates is high

due to many factors, including scientific feasibility, safety, efficacy, and changing standards of medical care. The results from preclinical testing or early
clinical trials of a product candidate may not predict the results that will be obtained in later phase clinical trials of the product candidate. We, the FDA or
other applicable regulatory authorities, an individual Institutional Review Board (“IRB”) with respect to its institution, or an independent ethics committee
may suspend clinical trials of a product candidate at any time for various reasons, including a belief that individuals participating in such trials are being
exposed to unacceptable health risks or adverse side effects. We may not have the financial resources to continue development of, or to enter into
collaborations for, a product candidate if we experience any problems or other unforeseen events that delay or prevent regulatory approval of, or our ability to
commercialize, product candidates, including:

•
requirement to conduct additional preclinical testing or clinical trials or abandon a program;

negative or inconclusive results from our clinical trials or the clinical trials of others for product candidates similar to ours, leading to a decision or

•
similar to our product candidates;

serious and unexpected drug-related side effects experienced by participants using our products in our clinical trials or by individuals using drugs

•
commence a clinical trial, or a suspension or termination of a clinical trial once commenced;

delays in submitting INDs or comparable foreign applications or delays or failures in obtaining the necessary approvals from regulators or IRBs to

•
of our clinical trials;

conditions imposed by the FDA or comparable foreign authorities, such as the European Medicines Agency (“EMA”), regarding the scope or design

•

•

competition for subjects in competitive clinical trials and delays in enrolling individuals in clinical trials;

high drop-out rates of study participants;

•
clinical trials;

inadequate supply or quality of drug product or product candidate components or materials or other supplies necessary for the conduct of our

•

•

•

greater than anticipated clinical trial costs;

poor effectiveness of our product candidates during clinical trials;

unfavorable FDA or other regulatory agency inspection and review of a clinical trial site;

•
timely manner, or at all;

failure of our third-party contractors or investigators to comply with regulatory requirements or otherwise meet their contractual obligations in a

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•
testing generally or with respect to our technology in particular; and

delays and changes in regulatory requirements, policy and guidelines, including the imposition of additional regulatory oversight around clinical

•

varying interpretations of data by the FDA and foreign regulatory agencies.

Breakthrough Therapy Designation by the FDA may not actually lead to a faster development or regulatory review or approval process.

The FDA has granted Breakthrough Therapy Designation to nedosiran for the treatment of patients with primary hyperoxaluria type 1 (“PH1”). A

breakthrough therapy is defined as a drug that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease
or condition, and preliminary clinical evidence indicates that the drug may demonstrate substantial improvement over currently approved therapies on one or
more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. The FDA will work closely with us to
provide guidance on subsequent development of nedosiran for treatment of PH1 to help us design and conduct a development program as efficiently as
possible. For drugs that have been designated as breakthrough therapies, interaction and communication between the FDA and the sponsor of the trial can
help to identify the most efficient path for clinical development while minimizing the number of patients placed in ineffective control regimens. Drugs
designated as breakthrough therapies by the FDA are also eligible for accelerated approval and priority review.

Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe a product candidate we develop meets the

criteria for designation as a breakthrough therapy, the FDA may disagree and instead determine not to make such designation. In any event, the receipt of
Breakthrough Therapy Designation may not result in a faster development process, review, or approval compared to drugs considered for approval under
conventional FDA procedures and does not assure ultimate approval by the FDA. In addition, even if a product candidate qualifies as a breakthrough therapy,
the FDA may later decide that the drug no longer meets the conditions for qualification and rescind the Breakthrough Therapy Designation. If the
Breakthrough Therapy Designation for nedosiran for treatment of PH1 is rescinded, submission of portions of the NDA will not be permitted under this
program.

We are dependent on our collaboration partners for the successful development of product candidates and, therefore, are subject to the efforts of these
partners and our ability to successfully collaborate with these partners.

We have entered into collaboration agreements with Novo Nordisk A/S (“Novo”), F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (together,

“Roche”), Eli Lilly and Company (“Lilly”), Alexion Pharmaceuticals, Inc. (together with its affiliates, “Alexion”), and Boehringer Ingelheim International
GmbH (“BI”) (collectively, our “Collaboration Partners”) providing joint development of certain RNAi therapies. The success of our collaborations with our
Collaboration Partners and the realization of the milestone and royalty payments under the collaboration agreements depends upon the efforts of our
Collaboration Partners, any of which may not be successful in obtaining approvals for the product candidates developed under the collaboration or in
marketing, or arranging for necessary supply, manufacturing, or distribution relationships for, any approved products. Our Collaboration Partners may change
their strategic focus or pursue alternative technologies in a manner that results in reduced, delayed, or no additional payments to us under the collaboration
agreements. Our Collaboration Partners have a variety of marketed products and product candidates under collaboration with other companies, possibly
including some of our competitors, and our Collaboration Partners’ own corporate objectives may not be consistent with our interests. If our Collaboration
Partners fail to develop, obtain regulatory approval for, or ultimately commercialize any product candidate under our collaborations, or if any of our
Collaboration Partners terminates their applicable collaboration, our business, financial condition, results of operations, and prospects could be materially and
adversely affected. Each of our collaboration agreements is terminable by the applicable collaboration partner any time at will, subject to compliance with
applicable notice periods. In addition, if we have a dispute or enter into litigation with any of our Collaboration Partners in the future, it could delay
development programs, create uncertainty as to ownership of intellectual property rights, distract management from other business activities, and generate
substantial expense.

If third parties on which we depend to conduct our preclinical studies, or any future clinical trials, do not perform as contractually required, fail to satisfy
regulatory or legal requirements, or miss expected deadlines, our development program could be delayed with materially adverse effects on our business,
financial condition, results of operations, and prospects.

We rely on third-party clinical investigators, contract research organizations (“CROs”), clinical data management organizations, and consultants to
design, conduct, supervise, and monitor preclinical studies of our product candidates and will do the same for any clinical trials. Because we rely on third
parties and do not have the ability to conduct preclinical studies or clinical trials independently, we have less control over the timing, quality, compliance, and
other aspects of preclinical studies and clinical trials than we would if we conducted them on our own. These investigators, CROs, and consultants are not our
employees and we have limited control over the amount of time and resources that they dedicate to our programs. These third parties may have contractual
relationships with other entities, some of which may be our competitors, which may draw time and resources from our programs. The

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third parties with which we contract might not be diligent, careful, compliant, or timely in conducting our preclinical studies or clinical trials, resulting in the
preclinical studies or clinical trials being delayed or unsuccessful.

If we cannot contract with acceptable third parties on commercially reasonable terms, or at all, or if these third parties do not carry out their contractual

duties, satisfy legal and regulatory requirements for the conduct of preclinical studies or clinical trials, or meet expected deadlines, our clinical development
programs could be delayed and otherwise adversely affected. In all events, we are responsible for ensuring that each of our preclinical studies and clinical
trials is conducted in accordance with the general investigational plan and protocols for the trial as well as applicable laws and regulations. The FDA and
certain foreign regulatory authorities, such as the EMA, require preclinical studies to be conducted in accordance with applicable good laboratory practices
and clinical trials to be conducted in accordance with applicable FDA regulations and applicable good clinical practices, including requirements for
conducting, recording, and reporting the results of preclinical studies and clinical trials to assure that data and reported results are credible and accurate and
that the rights, integrity, and confidentiality of clinical trial participants are protected. Our reliance on third parties that we do not control does not relieve us
of these responsibilities and requirements. Any such event could have a material adverse effect on our business, financial condition, results of operations, and
prospects.

Because we rely on third-party manufacturing and supply partners, our supply of research and development, preclinical studies, and clinical trial
materials may become limited or interrupted or may not be of satisfactory quantity or quality.

We rely on third-party supply and manufacturing companies and organizations to supply the materials, components, and manufacturing services for our

research and development, preclinical study, and clinical trial drug supplies. We do not own or lease manufacturing facilities or supply sources for such
components and materials; however, we recently entered into an initial five-year agreement with a supplier for the development, manufacture, and supply of
clinical and commercial product; this agreement allows for advance preferential scheduling to the manufacturing line. Our manufacturing requirements
include oligonucleotides and custom amidites which we procure on a purchase order basis. In addition, for each product candidate, we typically contract with
only one manufacturer for the formulation and filling of drug product. There can be no assurance that our supply of research and development, preclinical
study, and clinical trial drugs and other materials will not be limited, interrupted, restricted in certain geographic regions, or of satisfactory quality, or continue
to be available at acceptable prices. In particular, any replacement of our drug substance manufacturer could require significant effort and expertise because
there may be a limited number of qualified replacements.

Although we have multiple contract manufacturers, two of our amidite manufacturers are based in China, and as a result of the recent outbreak of the

coronavirus, there is an increased risk of supply interruption at those facilities. We are seeking to expand amidite production in other countries and to
manufacture inventory to reduce this risk.

If we are at any time unable to provide an uninterrupted supply of our product candidates or, following regulatory approval, any products to patients,
we may lose patients, physicians may elect to utilize competing therapeutics instead of our products, and our clinical trials may be adversely affected, which
could materially and adversely affect our clinical trial outcomes.

The manufacturing process for a product candidate is subject to FDA and foreign regulatory authority review. Suppliers and manufacturers must meet

applicable manufacturing requirements and undergo rigorous facility and process validation tests required by regulatory authorities in order to comply with
regulatory standards such as cGMP. In the event that any of our suppliers or manufacturers fails to comply with such requirements or to perform its
obligations regarding quality, timing or otherwise, or if our supply of components or other materials becomes limited or interrupted for other reasons, we may
experience shortages resulting in delayed shipments, supply constraints and/or stock-outs of our products, be forced to manufacture the materials ourselves,
for which we currently do not have the capabilities or resources, or enter into an agreement with another third party, which we may not be able to do on
reasonable terms, if at all. In some cases, the technical skills or technology required to manufacture our product candidates may be unique or proprietary to
the original manufacturer and we may have difficulty, or there may be contractual restrictions prohibiting us from, transferring such skills or technology to
another third party and a feasible alternative may not exist. These factors would increase our reliance on such manufacturer or require us to obtain a license
from such manufacturer in order to have another third party manufacture our product candidates. If we are required to change manufacturers for any reason,
we will be required to verify that the new manufacturer maintains facilities and procedures that comply with quality standards and with all applicable
regulations. The delays associated with the verification of a new manufacturer could negatively affect our ability to develop product candidates in a timely
manner or within budget.

We expect to continue to rely on third-party manufacturers if we receive regulatory approval for any product candidate. To the extent that we have
existing, or enter into future, manufacturing arrangements with third parties, we will depend on these third parties to perform their obligations in a timely
manner consistent with contractual and regulatory requirements, including those related to quality control and assurance. If we are unable to obtain or
maintain third-party manufacturing for product candidates, or to do so on commercially reasonable terms, we may not be able to develop and commercialize
our product candidates successfully. Our or a third party’s failure to execute on our manufacturing requirements could adversely affect our business in a
number of ways, including:
•

an inability to initiate or continue preclinical studies or clinical trials of product candidates under development;

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•

•

•

•

delay in submitting regulatory applications, or receiving regulatory approvals, for product candidates;

lack of or loss of the cooperation of a collaborator;

subjecting manufacturing facilities of our product candidates to additional inspections by regulatory authorities;

requirements to cease distribution or to recall batches of our product candidates; and

in the event of approval to market and commercialize a product candidate, an inability to meet commercial demands for our products.

We may not successfully engage in strategic transactions, including any additional collaborations we seek, which could adversely affect our ability to
develop and commercialize product candidates, impact our cash position, increase our expense, and present significant distractions to our management.

From time to time, we may consider strategic transactions, such as collaborations, acquisitions of companies, asset purchases, and out- or in-licensing

of product candidates or technologies. In addition to our current collaborations with Novo, Roche, Lilly, Alexion, and BI, we will evaluate and, if strategically
attractive, seek to enter into additional collaborations, including with major biopharmaceutical, biotechnology, or pharmaceutical companies. The competition
for collaborators is intense, and the negotiation process is time-consuming and complex. Any new collaboration may be on terms that are not optimal for us,
and we may be unable to maintain any existing or future collaboration if, for example, development or approval of a product candidate is delayed, sales of an
approved product do not meet expectations, or the collaborator terminates the collaboration. Any such collaboration, or other strategic transaction, may
require us to incur non-recurring or other charges, increase our near- and long-term expenditures, and pose significant integration or implementation
challenges or disrupt our management or business. These transactions entail numerous operational and financial risks, including exposure to unknown
liabilities, disruption of our business, and diversion of our management’s time and attention in order to obtain and manage a collaboration or develop acquired
products, product candidates, or technologies, incurrence of substantial debt or dilutive issuances of equity securities to pay transaction consideration or costs,
higher than expected collaboration, acquisition, or integration costs, write-downs of assets or impairment charges, increased amortization expenses, difficulty
and cost in facilitating the collaboration or combining the operations and personnel of any acquired business, deterioration of relationships with key suppliers,
manufacturers, or customers of any acquired business due to changes in management and ownership and the inability to retain key employees of any acquired
business. Accordingly, although there can be no assurance that we will undertake or successfully complete any transactions of the nature described above, any
transactions that we do complete may be subject to the foregoing or other risks and have a material adverse effect on our business, results of operations,
financial condition, and prospects. Conversely, failure to enter any collaboration or other strategic transaction that would be beneficial to us could delay the
development and potential commercialization of our product candidates and have a negative impact on the competitiveness of any product candidate that
reaches market.

We face competition from entities that have developed or may develop product candidates for our target disease indications, including companies
developing novel treatments and technology platforms based on modalities and technology similar to ours. If these companies develop technologies or
product candidates more rapidly than we do or their technologies, including delivery technologies, are more effective, our ability to develop and
successfully commercialize product candidates may be adversely affected.

The development and commercialization of drugs is highly competitive. We compete with a variety of multinational pharmaceutical companies and

specialized biotechnology companies, as well as technology being developed at universities and other research institutions. Our competitors have developed,
are developing, or may develop product candidates and processes competitive with our product candidates, some of which may become commercially
available before any of our product candidates. We believe that a significant number of products are currently under development and may become
commercially available in the future for the treatment of conditions for which we may try to develop product candidates.

Competitive therapeutic treatments include those that have already been approved and accepted by the medical community and any new treatments that

enter the market. We are aware of many companies that are working in the field of RNAi therapeutics, including major pharmaceutical companies and a
number of biopharmaceutical companies including Alnylam, Arrowhead Pharmaceuticals, Inc. (“Arrowhead”), and Arbutus Biopharma Corporation
(“Arbutus”).

We also compete with companies working to develop antisense and other RNA-based drugs including Ionis Pharmaceuticals, Akcea Therapeutics, Inc.,

Moderna, Inc., and Wave Life Sciences Ltd. Like RNAi therapeutics, antisense drugs target mRNA with the objective of suppressing the activity of specific
genes. The development of antisense drugs is more advanced than that of RNAi therapeutics with several antisense therapies currently approved, and
antisense technology may become the preferred technology for products that target mRNAs.

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Many of our competitors have significantly greater financial, technical, manufacturing, marketing, sales and supply resources or experience than we

have. Some of our competitors may be in the lead in the development of competitive products. If we successfully obtain approval for any product candidate,
we will face competition based on many different factors, including safety and effectiveness, ease with which our products can be administered, the timing of
product entry into the market, the extent to which patients and physicians accept relatively new routes of administration, timing and scope of regulatory
approvals, availability and cost of manufacturing, marketing and sales capabilities, price, reimbursement coverage, and patent position of our products.
Competing products could present superior treatment alternatives, including by being more effective, safer, less expensive or marketed and sold more
effectively than any products we may develop. Competitive products may make any products we develop obsolete or noncompetitive before we recover the
expense of developing and commercializing our product candidates. Competitive products that enter the market before our products could capture significant
market share and create barriers to entry to our products. Competitors could also recruit our employees, which could negatively impact our level of expertise
and our ability to execute our business plan.

Beyond RNA-based platform competition, there are a number of potential competitors working to develop therapeutics in our areas of research,
including Oxthera AB, Allena Pharmaceuticals, Inc., Vertex Pharmaceuticals, Inc., Assembly Biosciences, Inc., AbbVie, Inc., Gilead Sciences, Inc., Johnson
& Johnson, and GlaxoSmithKline plc.

Any inability to attract and retain qualified key management and technical personnel would impair our ability to implement our business plan.

Our success largely depends on the continued service of key management and other specialized personnel, including: Douglas M. Fambrough, III,
Ph.D., our chief executive officer; Bob D. Brown, Ph.D., our chief scientific officer; Ralf Rosskamp, M.D., our chief medical officer; James B. Weissman, our
chief operating officer; and Rob Ciappenelli, our chief commercial officer. The loss of one or more members of our management team or other key employees
or advisors could delay our research and development programs and materially harm our business, financial condition, results of operations, and prospects.
The relationships that our key managers have cultivated within our industry make us particularly dependent upon their continued employment with us. We are
dependent on the continued service of our technical personnel because of the highly complex nature of our product candidates and technologies and the
specialized nature of the regulatory approval process. Because our management team and key employees are not obligated to provide us with continued
service, they could terminate their employment with us at any time without penalty. We do not maintain key person life insurance policies on any of our
management team members or key employees. Our future success will depend in large part on our continued ability to attract and retain other highly qualified
scientific, technical, and management personnel, as well as personnel with expertise in clinical testing, manufacturing, governmental regulation, and
commercialization. We face competition for personnel from other companies, universities, public and private research institutions, government entities, and
other organizations.

Interim and preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data become available or
as additional analyses are conducted and as the data are subject to audit and verification procedures that could result in material changes in the final
data.

From time to time, we may publish interim or preliminary data from our clinical studies. Interim data from clinical trials that we may complete are

subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data become available.
Preliminary data also remain subject to audit and verification procedures that may result in the final data being materially different from the preliminary data
we previously published. As a result, interim and preliminary data should be viewed with caution until the final data are available. Material adverse changes
between preliminary or interim data and final data could significantly harm our business prospects.

If our product candidates advance into clinical trials, we may experience difficulties in managing our growth and expanding our operations.

Compared to larger pharmaceutical companies, we have limited experience in drug development and with clinical trials of product candidates. As our

product candidates enter and advance through preclinical studies and any clinical trials, we will need to expand our development, regulatory, and
manufacturing capabilities or contract with other organizations to provide these capabilities for us. In the future, we expect to have to manage additional
relationships with collaborators, contract research organizations, clinical trial sites, investigators, suppliers, and other firms. Our ability to manage our
operations and future growth will require us to continue to improve our operational, financial, and management controls, reporting systems, and procedures.
We may not be able to implement improvements to our management information and control systems in an efficient or timely manner and may discover
deficiencies in existing systems and controls.

We or our collaborative partners may conduct clinical trials for product candidates outside of the U.S., and the FDA and comparable foreign regulatory
authorities may not accept data from such trials.

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We or our collaborative partners may in the future choose to conduct one or more clinical trials outside the U.S., including in Europe. For instance, our

clinical trials of nedosiran, RG6346, and DCR-A1AT each include subjects outside of the U.S. The acceptance of study data from clinical trials conducted
outside of the U.S. or another jurisdiction by the FDA or comparable foreign regulatory authority may be subject to certain conditions or may not be accepted
at all. In cases where data from foreign clinical trials are intended to serve as the basis for marketing approval in the U.S., the FDA will generally not approve
the application on the basis of foreign data alone unless (i) the data are applicable to the U.S. population and U.S. medical practice; and (ii) the trials were
performed by clinical investigators of recognized competence and pursuant to GCP regulations. Additionally, the FDA’s clinical trial requirements, including
sufficient size of patient populations and statistical powering, must be met. Many foreign regulatory authorities have similar approval requirements. In
addition, such foreign trials would be subject to the applicable local laws of the foreign jurisdictions where the trials are conducted. There can be no assurance
that the FDA or any comparable foreign regulatory authority will accept data from trials conducted outside of the U.S. or the applicable international
jurisdiction for which we plan to enroll subjects outside of the U.S. If the FDA or any comparable foreign regulatory authority does not accept such data, it
would result in the need for additional trials, which would be costly and time-consuming and delay aspects of our business plan, and which may result in
product candidates that we may develop not receiving approval or clearance for commercialization in the applicable jurisdiction.

If any of our product candidates are approved for marketing and commercialization and we are unable to develop sales, marketing, and distribution
capabilities on our own or enter into agreements with third parties to perform these functions on acceptable terms, we will be unable to successfully
commercialize any such future products.

We currently have limited sales, marketing, or distribution capabilities or experience. If any of our product candidates are approved, we will need to

significantly expand and implement sales, marketing, and distribution capabilities to commercialize such products, which would be expensive and time-
consuming, or enter into collaborations with third parties to perform these services. If we decide to market our products directly, we will need to commit
significant financial, legal, and managerial resources to develop a marketing and sales force with technical expertise and supporting distribution,
administration, and compliance capabilities. If we rely on third parties with such capabilities to market our approved products or decide to co-promote
products with collaborators, we will need to establish and maintain marketing and distribution arrangements with third parties, and there can be no assurance
that we will be able to enter into such arrangements on acceptable, compliant terms, or at all. In entering into third-party marketing or distribution
arrangements, any commercial revenue we receive will depend upon the efforts of the third parties and there can be no assurance that such third parties will
establish adequate sales and distribution capabilities or be successful in gaining market acceptance of any approved product. If we are not successful in
commercializing any product approved in the future, either on our own or through third parties, our business, financial condition, results of operations, and
prospects could be materially and adversely affected.

If we fail to comply with U.S. and foreign regulatory requirements, regulatory authorities could limit or withdraw any marketing or commercialization
approvals we may receive and subject us to other penalties that could materially harm our business.

The Company, our product candidates, our suppliers, and our contract manufacturers, distributors, and contract testing laboratories are subject to

extensive regulation by governmental authorities in the EU, the U.S., and other countries, with the regulations differing from country to country.

Even if we receive marketing and commercialization approval of a product candidate, we and our third-party service providers will be subject to
continuing regulatory requirements, including a broad array of regulations related to establishment registration and product listing, manufacturing processes,
risk management measures, quality and pharmacovigilance systems, post-approval clinical studies, labeling, advertising and promotional activities, record
keeping, distribution, adverse event reporting, import and export of pharmaceutical products, pricing, sales and marketing, and fraud and abuse requirements.
We are required to submit safety and other post-market information and reports and are subject to continuing regulatory review, including in relation to
adverse patient experiences with the product and clinical results that are reported after a product is made commercially available, both in the U.S. and any
foreign jurisdiction in which we seek regulatory approval. The FDA and certain foreign regulatory authorities, such as the EMA, have significant post-market
authority, including the authority to require labeling changes based on new safety information and to require post-market studies or clinical trials to evaluate
safety risks related to the use of a product or to require withdrawal of the product from the market. The FDA also has the authority to require a risk evaluation
and mitigation strategy (“REMS”) plan after approval, which may impose further requirements or restrictions on the distribution or use of an approved drug.
The EMA now routinely requires risk management plans (“RMPs”) as part of the marketing authorization application process, and such plans must be
continually modified and updated throughout the lifetime of the product as new information becomes available. In addition, for nationally authorized
medicinal products, the relevant governmental authority of any EU member state can request an RMP whenever there is a concern about a risk affecting the
benefit risk balance of the product. The manufacturer and manufacturing facilities we use to make a future product, if any, will also be subject to periodic
review and inspection by the FDA and other regulatory agencies, including for continued compliance with cGMP requirements. The discovery of any new or
previously unknown problems with our third-party manufacturers, manufacturing processes, or facilities may result in restrictions on the product,
manufacturer, or facility, including withdrawal of the product from the market. If we rely on third-party manufacturers, we will not have control over

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compliance with applicable rules and regulations by such manufacturers. Any product promotion and advertising will also be subject to regulatory
requirements and continuing regulatory review. If we or our collaborators, manufacturers, or service providers fail to comply with applicable continuing
regulatory requirements in the U.S. or foreign jurisdictions in which we seek to market our products, we or they may be subject to, among other things, fines,
warning and untitled letters, clinical holds, delay or refusal by the FDA or foreign regulatory authorities to approve pending applications or supplements to
approved applications, suspension, refusal to renew or withdrawal of regulatory approval, product recalls, seizures or administrative detention of products,
refusal to permit the import or export of products, operating restrictions, inability to participate in government programs including Medicare and Medicaid,
and total or partial suspension of production or distribution, injunction, restitution, disgorgement, debarment, civil penalties, and criminal prosecution.

We face risks arising from the results of the public referendum held in the United Kingdom and its membership in the European Union.

We have a subsidiary located in the United Kingdom (the “UK”), which we established in order to allow us to conduct clinical trials in EU member

states. On June 23, 2016, the UK held a referendum in which a majority of the eligible members of the electorate voted to leave the EU. The UK’s withdrawal
from the EU is commonly referred to as Brexit. Pursuant to Article 50 of the Treaty on European Union, the UK ceased being a Member State of the EU on
January 31, 2020. However, the terms of the withdrawal have yet to be fully negotiated. The implementation period began February 1, 2020 and will continue
until December 31, 2020. During this 11-month period, the UK will continue to follow all of the EU’s rules and its trading relationship will remain the same.
However, regulations (including financial laws and regulations, tax and free trade agreements, intellectual property rights, data protection laws, supply chain
logistics, environmental, health and safety laws and regulations, medicine licensing and regulations, immigration laws and employment laws), have yet to be
addressed. This lack of clarity on future UK laws and regulations and their interaction with EU laws and regulations may negatively impact foreign direct
investment in the UK, increase costs, depress economic activity, and restrict access to capital. The uncertainty concerning the UK’s legal, political, and
economic relationship with the EU after Brexit may be a source of instability in the international markets, create significant currency fluctuations, and/or
otherwise adversely affect trading agreements or similar cross-border co-operation arrangements (whether economic, tax, fiscal, legal, regulatory or
otherwise) beyond the date of Brexit.

These developments, or the perception that any of them could occur, may have a significant adverse effect on global economic conditions and the
stability of global financial markets, and could significantly reduce global market liquidity and limit the ability of key market participants to operate in certain
financial markets. In particular, it could also lead to a period of considerable uncertainty in relation to the UK financial and banking markets, as well as on the
regulatory process in Europe. Asset valuations, currency exchange rates, and credit ratings may also be subject to increased market volatility.

If the UK and the EU are unable to negotiate acceptable agreements or if other EU Member States pursue withdrawal, barrier-free access between the

UK and other EU Member States or among the European Economic Area overall could be diminished or eliminated. The long-term effects of Brexit will
depend on any agreements (or lack thereof) between the UK and the EU and, in particular, any arrangements for the UK to retain access to EU markets either
during a transitional period or more permanently.

Such a withdrawal from the EU is unprecedented, and it is unclear how the UK’s access to the European single market for goods, capital, services, and
labor within the EU, or single market, and the wider commercial, legal, and regulatory environment, will impact our current and future operations (including
business activities conducted by third parties and contract manufacturers on our behalf) and clinical activities in the UK. In addition to the foregoing, our UK
operations support our current and future operations and clinical activities in other countries in the EU and European Economic Area (“EEA”), and these
operations and clinical activities could be disrupted by Brexit.

We may also face new regulatory costs and challenges that could have an adverse effect on our operations. Depending on the terms of the UK’s

withdrawal from the EU, the UK could lose the benefits of global trade agreements negotiated by the EU on behalf of its members, which may result in
increased trade barriers that could make our doing business in the EU and the EEA more difficult. Furthermore, at present, there are no indications of the
effect Brexit will have on the pathway to obtaining marketing approval for any of our product candidates in the UK., or what, if any, role the EMA may have
in the approval process. Even prior to any change to the UK’s relationship with the EU, the announcement of Brexit has created economic uncertainty
surrounding the terms of Brexit and its consequences could adversely impact customer confidence resulting in customers reducing their spending budgets on
our solutions, which could adversely affect our business, revenue, financial condition, results of operations, and could adversely affect the market price of our
common shares.

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Price controls imposed in foreign markets and downward pricing pressure in the U.S. may adversely affect our future profitability.

In some countries, particularly member states of the EU, the pricing of prescription drugs may be subject to governmental control, at national as well as

at regional levels. In these countries, pricing negotiations with governmental authorities can take considerable time after receipt of marketing approval for a
product. In addition, in the U.S. and elsewhere, there can be considerable pressure by governments and other stakeholders on prices and reimbursement
levels, including as part of cost containment measures. Political, economic, and regulatory developments may further complicate pricing and reimbursement
negotiations, and pricing negotiations may continue after coverage or reimbursement has been obtained. Reference pricing used by various EU member states
and parallel distribution, or arbitrage between low-priced and high-priced member states, can further reduce prices. In some countries, we or our collaborators
may be required to conduct a clinical trial or other studies that compare the cost-effectiveness of our RNAi therapeutic candidates to other available therapies
in order to obtain or maintain reimbursement or pricing approval. Publication of discounts by third-party payors or authorities may lead to further pressure on
the prices or reimbursement levels within the country of publication and other countries. If reimbursement of any product candidate approved for marketing is
unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels, our business, financial condition, results of operations, or prospects
could be adversely affected.

Our business entails a significant risk of product liability and our ability to obtain sufficient insurance coverage could harm our business, financial
condition, results of operations, or prospects.

Our business exposes us to significant product liability risks inherent in the development, testing, manufacturing, and marketing of therapeutic
treatments. Product liability claims could delay or prevent completion of our development programs. If we succeed in marketing products, such claims could
result in an investigation by certain regulatory authorities, such as the FDA or foreign regulatory authorities, of the safety and effectiveness of our products,
our manufacturing processes and facilities, or our marketing programs and potentially a recall of our products or more serious enforcement action, limitations
on the approved indications for which they may be used, or suspension or withdrawal of approvals. Regardless of the merits or eventual outcome, liability
claims may also result in decreased demand for our products, injury to our reputation, costs to defend related litigation, a diversion of management’s time and
our resources, substantial monetary awards to clinical trial participants or patients, and a decline in our stock price. We currently have product liability
insurance that we believe is appropriate for our stage of development and may need to obtain higher levels prior to marketing any of our product candidates.
Any insurance we have or may obtain may not provide sufficient coverage against potential liabilities. Furthermore, clinical trial and product liability
insurance is becoming increasingly expensive. As a result, we may be unable to obtain sufficient insurance at a reasonable cost to protect us against losses
caused by product liability claims that could have a material adverse effect on our business.

Our employees may engage in misconduct or other improper activities, including noncompliance with regulatory standards and requirements, which
could have a material adverse effect on our business.

We are exposed to the risk of employee fraud or other misconduct. Misconduct by employees could include, but is not limited to, intentional failures to

comply with FDA or U.S. healthcare laws and regulations or applicable laws, regulations, guidance, or codes of conduct set by foreign governmental
authorities or self-regulatory industry organizations, provide accurate information to any governmental authorities such as the FDA, comply with
manufacturing standards we may establish, comply with federal and state healthcare fraud and abuse laws and regulations, report financial information or data
accurately, or disclose unauthorized activities to us. In particular, sales, marketing, and business arrangements in the healthcare industry are subject to
extensive laws, regulations, guidance, and codes of conduct intended to prevent fraud, kickbacks, self-dealing, and other abusive practices. These laws,
regulations, guidance, and codes of conduct may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, sales commission,
customer incentive programs, business or conduct involving healthcare professionals, and other business arrangements. Employee misconduct could also
involve the improper use of information obtained in the course of clinical trials, which could result in regulatory sanctions, including debarment or
disqualification of those employees from participation in FDA-regulated activities, and serious harm to our reputation. It is not always possible to identify and
deter employee misconduct, and any precautions we take to detect and prevent this activity may not be effective in controlling unknown or unmanaged risks
or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in compliance with such laws,
regulations, guidance, or codes of conduct. If any such actions are instituted against us, and we are not successful in defending ourselves or asserting our
rights, those actions could have a significant impact on our business, including the imposition of significant fines, exclusion from government programs, or
other sanctions.

Our internal computer systems, or those of third parties with which we do business, including our CROs or other contractors or consultants, may fail or
suffer security breaches, which could result in a material disruption of our product development programs or the theft of Company or patient confidential
information.

Despite the implementation of security measures, our internal computer systems and those of third parties with which we do business, including our

CROs and other contractors and consultants, are vulnerable to damage from computer viruses, unauthorized

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access, natural disasters, terrorism, war, and telecommunication and electrical failures. Such events, as well as power outages, natural disasters (including
extreme weather), terrorist attacks, phishing or ransomware attacks, or other similar events, could cause interruptions of our operations.

In the ordinary course of our business, we collect and store sensitive data, including, among other things, legally protected patient health information,

personally identifiable information about our employees, intellectual property, and proprietary business information. We manage and maintain our
applications and data utilizing on-site systems and outsourced vendors. These applications and data encompass a wide variety of business-critical information,
including research and development information, commercial information, and business and financial information. Because information systems, networks,
and other technologies are critical to many of our operating activities, shutdowns or service disruptions at our company or vendors that provide information
systems, networks, or other services to us pose increasing risks. Such disruptions may be caused by events such as computer hacking, phishing attacks,
ransomware, dissemination of computer viruses, worms, and other destructive or disruptive software, denial of service attacks and other malicious activity, as
well as power outages, natural disasters (including extreme weather), terrorist attacks or other similar events. Such events could have an adverse impact on us
and our business, including loss of data and damage to equipment and data. In addition, system redundancy may be ineffective or inadequate, and our disaster
recovery planning may not be sufficient to cover all eventualities. Significant events could result in a disruption of our operations, damage to our reputation,
or a loss of revenues. In addition, we may not have adequate insurance coverage to compensate for any losses associated with such events. For instance, the
loss of preclinical data or data from any future clinical trial involving our product candidates could result in delays in our development and regulatory filing
efforts and significantly increase our costs.

We could be subject to risks caused by misappropriation, misuse, leakage, falsification or intentional or accidental release or loss of information

maintained in the information systems and networks of our company and our vendors, including personal information of our employees and patients, and
company and vendor confidential data. In addition, outside parties may attempt to penetrate our systems or those of our vendors or fraudulently induce our
personnel or the personnel of our vendors to disclose sensitive information in order to gain access to our data and/or systems. We may experience threats to
our data and systems, including malicious codes and viruses, phishing, and other cyber-attacks. The number and complexity of these threats continue to
increase over time. If a material breach of our information technology systems or those of our vendors occurs, the market perception of its effectiveness of our
security measures could be harmed and our reputation and credibility could be damaged. We could be required to expend significant amounts of money and
other resources to repair or replace information systems or networks. Certain data breaches must also be reported to affected individuals and the government,
and in some cases to the media, under provisions of the U.S. federal Health Insurance Portability and Accountability Act (“HIPAA”), as amended by the
Health Information Technology for Economic and Clinical Health Act (“HITECH”), other U.S. federal and state law, and requirements of non-U.S.
jurisdictions, including the European Union Data Protection Directive, and financial penalties may also apply. To the extent that any disruption or security
breach were to result in a loss of, or damage to, internal computer systems, or those used by our CROs or other independent organizations, advisors,
contractors or consultants, our data, or inappropriate disclosure of confidential or proprietary information of the Company or patients, we could incur liability,
reputational harm, and the development of our product candidates could be delayed.

In addition, we could be subject to regulatory actions and/or claims made by individuals and groups in private litigation involving privacy issues

related to data collection and use practices and other data privacy laws and regulations, including claims for misuse or inappropriate disclosure of data, as
well as unfair or deceptive practices. Although we develop and maintain systems and controls designed to prevent these events from occurring, and we have a
process to identify and mitigate threats, the development and maintenance of these systems, controls, and processes is costly and requires ongoing monitoring
and updating as technologies change and efforts to overcome security measures become increasingly sophisticated. Moreover, despite our efforts, the
possibility of these events occurring cannot be eliminated entirely. As we outsource more of our information systems to vendors, engage in more electronic
transactions with payors and patients, and rely more on cloud-based information systems, the related security risks will increase and we may need to expend
additional resources to protect our technology and information systems. In addition, there can be no assurance that our internal information technology
systems or those of our third-party contractors, or our consultants’ efforts to implement adequate security and control measures, will be sufficient to protect us
against breakdowns, service disruption, data deterioration or loss in the event of a system malfunction, or prevent data from being stolen or corrupted in the
event of a cyberattack, security breach, industrial espionage attacks, or insider threat attacks which could result in financial, legal, business, or reputational
harm.

If we do not comply with laws regulating the protection of the environment and health and human safety, our business could be adversely affected.

Our research, development, and manufacturing involve the use of hazardous materials and various chemicals. We maintain quantities of various
flammable and toxic chemicals in our facility in Lexington, Massachusetts, that are required for our research, development, and manufacturing activities. We
are subject to federal, state, and local laws and regulations governing the use, manufacture, storage, handling, and disposal of these hazardous materials. We
believe our procedures for storing, handling, and disposing these materials in our Lexington facility comply with the relevant guidelines of Lexington, the
Commonwealth of Massachusetts, and the Occupational Safety and Health Administration of the U.S. Department of Labor. Although we believe that our

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safety procedures for handling and disposing of these materials comply with the standards mandated by applicable regulations, the risk of accidental
contamination or injury from these materials cannot be eliminated. If an accident occurs, we could be held liable for resulting damages, which could be
substantial. We are also subject to numerous environmental, health, and workplace safety laws and regulations, including those governing laboratory
procedures, exposure to blood-borne pathogens, and the handling of animals and biohazardous materials. Although we maintain workers’ compensation
insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting from the use of these materials, this insurance may not
provide adequate coverage against potential liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted
against us in connection with our storage or disposal of biological or hazardous materials. Additional federal, state, and local laws and regulations affecting
our operations may be adopted in the future. We may incur substantial costs to comply with, and substantial fines or penalties if we violate, any of these laws
or regulations.

Our information technology systems could face serious disruptions that could adversely affect our business.

Despite the use of off-site (cloud-based) information storage systems for certain key corporate information, our internal information technology and
other infrastructure systems, including corporate firewalls, servers, leased lines, and connection to the Internet, face the risk of systemic failure that could
disrupt our operations. A significant disruption in the availability of our information technology and other internal infrastructure systems could cause
interruptions in our collaborations and delays in our research and development work. While we qualify and seek to ensure our cloud-based information
systems have appropriate cybersecurity and operations controls, we are dependent on third parties to assure their operations meet our information technology
requirements.

Our current operations are largely concentrated in one location and any events affecting this location may have material adverse consequences.

Our current operations are carried out primarily in our facility located in Lexington, Massachusetts. Any unplanned event, such as flood, fire,
explosion, earthquake, extreme weather condition, medical epidemics, power shortage, telecommunication failure, or other natural or manmade accidents, or
incidents that prevent us from fully utilizing the facilities, may have a material adverse effect on our ability to operate our business, particularly on a daily
basis, and have significant negative consequences on our financial and operating conditions. Loss of access to these facilities may result in increased costs,
delays in the development of our product candidates, or interruption of our business operations. As part of our risk management policy, we maintain insurance
coverage at levels that we believe are appropriate for our business. However, in the event of an accident or incident at these facilities, we cannot assure you
that the amounts of insurance will be sufficient to satisfy any damages and losses. If our facilities are unable to operate because of an accident or incident or
for any other reason, even for a short period of time, any or all of our research and development programs may be harmed. Any business interruption may
have a material adverse effect on our business, financial position, results of operations, and prospects.

Our ability to utilize our net operating loss carryforwards and certain other tax attributes may be limited.

We have incurred substantial losses during our history, do not expect to become profitable for the foreseeable future, and may never achieve
profitability. To the extent that we continue to generate taxable losses, unused losses will carry forward to offset future taxable income, if any, until such
unused losses expire. We may be unable to use these losses to offset income before such unused losses expire. Under Section 382 of the Internal Revenue
Code of 1986, as amended, if a corporation undergoes an “ownership change,” which is generally defined as a greater than 50 percentage point change by
value in its equity ownership over a three-year period, the corporation’s ability to use its pre-change net operating loss carryforwards and other pre-change tax
attributes to offset its post-change income may be further limited. We are in the process of performing an analysis on whether we have experienced any
ownership changes in the past. Our preliminary analysis indicates that we may have experienced ownership changes in November 2007, October 2010,
February 2014, and March 2018. While this analysis is still preliminary, it is likely that our net operating losses are subject to such limitation. As of December
31, 2019, we had significant U.S. federal and Massachusetts net operating loss carryforwards that could be reduced or lost if we have or do experience an
ownership change, which could have an adverse effect on our business, financial position, results of operations, and prospects.

The investment of our cash, cash equivalents, and held-to-maturity investments is subject to risks which may cause losses and affect the liquidity of these
investments.

As of December 31, 2019, we had $348.9 million in cash, cash equivalents, and held-to-maturity investments. We historically have invested
substantially all of our available cash and cash equivalents in corporate bonds, commercial paper, securities issued by the U.S. government, certificates of
deposit, and money market funds meeting the criteria of our investment policy, which is focused on the preservation of our capital. These investments are
subject to general credit, liquidity, market, and interest rate risks. For example, the impact of U.S. sub-prime mortgage defaults in recent years affected
various sectors of the financial markets and caused

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credit and liquidity issues. We may realize losses in the fair value of these investments or a complete loss of these investments, which would have a negative
effect on our consolidated financial statements.

In addition, should our investments cease paying or reduce the amount of interest paid to us, our interest income would suffer. The market risks

associated with our investment portfolio may have an adverse effect on our results of operations, liquidity, and financial condition.

Changes in accounting rules and regulations, or interpretations thereof, could result in unfavorable accounting charges or require us to change our
compensation policies.

Accounting methods and policies for public companies and biopharmaceutical companies, including policies governing revenue recognition, research

and development and related expenses, and accounting for stock-based compensation, are subject to review, interpretation, and guidance from our auditors
and relevant accounting authorities, including the SEC. Changes to accounting methods or policies, or interpretations thereof, may require us to reclassify,
restate, or otherwise change or revise our consolidated financial statements, including those contained in our Annual Reports on Form 10-K.

Risks Related to Intellectual Property

If we are not able to obtain and enforce patent protection for our technologies or product candidates, development and commercialization of our product
candidates may be adversely affected.

Our success depends in part on our ability to obtain and maintain patents and other forms of intellectual property rights, including in-licenses of
intellectual property rights of others, for our product candidates, methods used to manufacture our product candidates and methods for treating patients using
our product candidates, as well as our ability to preserve our trade secrets, to prevent third parties from infringing upon our proprietary rights, and to operate
without infringing upon the proprietary rights of others. There can be no assurance that an issued patent will remain valid and enforceable in a court of law
through the entire patent term. Should the validity of a patent be challenged, the legal process associated with defending the patent may be costly and time
consuming. Issued patents can be subject to oppositions, interferences, post-grant proceedings, and other third-party challenges that can result in the
revocation of the patent or limit patent claims such that patent coverage lacks sufficient breadth to protect subject matter that is commercially relevant.
Competitors may be able to circumvent our patents. Development and commercialization of pharmaceutical products can be subject to substantial delays and
it is possible that at the time of commercialization any patent covering the product will have expired or will be in force for only a short period of time
thereafter.

As of December 31, 2019, our worldwide patent estate, not including the patents and patent applications that we have licensed from third parties,
included at least 75 issued patents or allowed patent applications and over 175 pending patent applications supporting commercial development of our RNAi
molecules and delivery technologies. We may not be able to apply for patents on certain aspects of our product candidates or delivery technologies in a timely
fashion or at all. Our existing issued and granted patents and any future patents we obtain may not be sufficiently broad to prevent others from using our
technology or from developing competing products and technology. There is no guarantee that any of our pending patent applications will result in issued or
granted patents, that any of our issued or granted patents will not later be found to be invalid or unenforceable, or that any issued or granted patents will
include claims that are sufficiently broad to cover our product candidates or delivery technologies or to provide meaningful protection from our competitors.
Moreover, the patent position of biotechnology and pharmaceutical companies can be highly uncertain because it involves complex legal and factual
questions. We will be able to protect our proprietary rights from unauthorized use by third parties only to the extent that our current and future proprietary
technology and product candidates are covered by valid and enforceable patents or are effectively maintained as trade secrets. If third parties disclose or
misappropriate our proprietary rights, it may materially and adversely impact our position in the market.

The U.S. Patent and Trademark Office (“USPTO”) and various foreign governmental patent agencies require compliance with a number of procedural,
documentary, fee payment, and other provisions during the patent process. There are situations in which noncompliance can result in abandonment or lapse of
a patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. In such an event, competitors might be able to
enter the market earlier than would otherwise have been the case. The standards applied by the USPTO and foreign patent offices in granting patents are not
always applied uniformly or predictably. For example, there is no uniform worldwide policy regarding patentable subject matter or the scope of claims
allowable in biotechnology and pharmaceutical patents. As such, we do not know the degree of future protection that we will have on our proprietary products
and technology. While we will endeavor to protect our product candidates with intellectual property rights such as patents, as appropriate, the process of
obtaining patents is time-consuming, expensive, and sometimes unpredictable.

In addition, there are numerous recent changes to the patent laws and proposed changes to the rules of the USPTO which may have a significant impact

on our ability to protect our technology and enforce our intellectual property rights. The U.S. Supreme Court

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has ruled on several patent cases in recent years, some of which cases either narrow the scope of patent protection available in certain circumstances or
weaken the rights of patent owners in certain situations. The 2013 decision by the U.S. Supreme Court in Association for Molecular Pathology v. Myriad
Genetics, Inc. precludes a claim to a nucleic acid having a stated nucleotide sequence which is identical to a sequence found in nature and unmodified. We
currently are not aware of an immediate impact of this decision on our patents or patent applications because we are developing nucleic acid products that are
not found in nature. However, this decision has yet to be clearly interpreted by courts and by the USPTO. We cannot assure you that the interpretations of this
decision or subsequent rulings will not adversely impact our patents or patent applications. In addition to increasing uncertainty with regard to our ability to
obtain patents in the future, this combination of events has created uncertainty with respect to the value of patents, once obtained. Depending on decisions by
the U.S. Congress, the federal courts, and the USPTO, the laws and regulations governing U.S. patents could change in unpredictable ways that would
weaken our ability to obtain new patents or to enforce our existing patents and patents that we might obtain in the future.

Once granted, patents may remain open to opposition, interference, re-examination, post-grant review, inter partes review, nullification or derivation
action in court or before patent offices or similar proceedings for a given period before or after allowance or grant, during which time third parties can raise
objections against such initial grant. In the course of such proceedings, which may continue for a protracted period of time, the patent owner may be
compelled to limit the scope of the allowed or granted claims thus attacked or may lose the allowed or granted claims altogether. Our patent risks include that:

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claims of the patents that we own or license;

others may, or may be able to, make, use, or sell compounds that are the same as or similar to our product candidates but that are not covered by the

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inventions;

we or our licensors, collaborators, or any future collaborators may not be the first to file patent applications covering certain aspects of our

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property rights;

others may independently develop similar or alternative technologies or duplicate any of our technologies without infringing our intellectual

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a third party may challenge our patents, and, if challenged, a court may not hold that our patents are valid, enforceable, and infringed;

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granted claims or lose the allowed or granted claims altogether;

a third party may challenge our patents in various patent offices, and, if challenged, we may be compelled to limit the scope of our allowed or

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parties;

•

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any issued patents that we own or have licensed from others may not provide us with any competitive advantages, or may be challenged by third

we may not develop additional proprietary technologies that are patentable;

the patents of others could harm our business; and

•
information learned from such activities to develop competitive products for sale in our major commercial markets.

our competitors could conduct research and development activities in countries where we will not have enforceable patent rights and then use the

Intellectual property rights of third parties could adversely affect our ability to commercialize our product candidates, and we might be required to litigate
or obtain licenses from third parties in order to develop or market our product candidates. Such litigation could be costly and licenses may be unavailable
on commercially reasonable terms.

Research and development of RNAi-based therapeutics and other oligonucleotide-based therapeutics has resulted in many patents and patent

applications from organizations and individuals seeking to obtain patent protection in the field. Our efforts are based on RNAi technology that we have
licensed and that we have developed internally and own or co-own. We have chosen this approach to increase our likelihood of technical success and our
freedom to operate. We have obtained grants and issuances of RNAi-based patents and have licensed other patents from third parties on exclusive and non-
exclusive bases. The issued patents and pending patent applications in the U.S. and in key markets around the world that we own, co-own, or license claim
many different methods, compositions, and processes relating to the discovery, development, manufacture, and commercialization of RNAi therapeutics.
Specifically, we own, co-own, or have licensed a portfolio of patents, patent applications, and other intellectual property covering: (1) certain aspects of the
structure and uses of RNAi molecules, including their manufacture and use as therapeutics, and RNAi-related mechanisms, (2) chemical modifications to
RNAi molecules that improve their properties and suitability for therapeutic uses, (3) RNAi molecules directed to specific gene sequences and drug targets as
treatments for particular diseases, and (4) delivery technologies, such as in the field of lipid nanoparticles and lipid nanoparticle formulation, and chemical
modifications such as conjugation to targeting moieties.

The RNAi-related intellectual property landscape, including patent applications in prosecution where no definitive claims have yet issued, is still

evolving, and it is difficult to conclusively assess our freedom to operate. Other companies are pursuing patent

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applications and possess issued patents broadly directed to RNAi compositions, methods of making and using RNAi, and to RNAi-related delivery and
modification technologies. Our competitive position may suffer if patents issued to third parties cover our products, or our manufacture or uses relevant to our
commercialization plans. In such cases, we may not be in a position to commercialize products unless we enter into a license agreement with the intellectual
property right holder, if available, on commercially reasonable terms or successfully pursue litigation, opposition, interference, re-examination, post-grant
review, inter partes review, nullification, derivation action, or cancellation proceeding to limit, nullify, or invalidate the third-party intellectual property right
concerned. Even if we are successful in limiting, nullifying, or invalidating third-party intellectual property rights through such proceedings, we may incur
substantial costs and could require significant time and attention of our personnel.

While we believe our intellectual property allows us to pursue our current development programs, the biological process of RNAi is a natural process
and cannot be patented. Several companies in the space are pursuing alternate methods to exploit this phenomenon and have built their intellectual property
around these methods. For example, Alnylam controls three patent families containing both pending patent applications and issued patents (e.g., U.S. Patent
Numbers 8,853,384 and 9,074,213, and European Patent EP 1 352 061 B1) that pertain to RNAi. These are referred to in their corporate literature as the
“Tuschl family” (e.g. patents and applications claiming priority to WO2002/044321, filed November 29, 2001, and their priority filings) and the “Kreutzer-
Limmer family” (e.g., patents and applications claiming priority to WO 2000/044895, filed January 29, 2000, WO 2002/055693, filed January 9, 2002, and
their priority filings). Both families contain patent applications still in prosecution, with the applicants actively seeking to extend the reach of this intellectual
property in ways that might strategically impact our business. Additional areas of intellectual property pursued by Alnylam and others include oligonucleotide
delivery-related technologies (such as conjugation to targeting moieties) and oligonucleotides directed to specific gene targets. In addition, Silence
Therapeutics owns patents directed to certain chemical modifications of RNAi molecules, including U.S. Patent Number 9,222,092, with a priority date of
August 5, 2002.

Patent applications in the U.S. and elsewhere are generally published approximately 18 months after the earliest filing for which priority is claimed,

with such earliest filing date being commonly referred to as the priority date. Therefore, patent applications covering our product candidates or platform
technology could have been filed by others without our knowledge. Additionally, pending claims in patent applications which have been published can,
subject to certain limitations, be later amended in a manner that could cover our platform technologies, our product candidates, or the use of our product
candidates. Third-party intellectual property right holders may also bring patent infringement claims against us. No such patent infringement actions have
been brought against us. We cannot guarantee that we will be able to successfully settle or otherwise resolve any future infringement claims. If we are unable
to successfully settle future claims on terms acceptable to us, we may be required to engage in or continue costly, unpredictable, and time-consuming
litigation, and may be prevented from or experience substantial delays in marketing our products. If we fail in any such dispute, in addition to being forced to
pay damages, we may be temporarily or permanently prohibited from commercializing any of our product candidates that are held to be infringing. We might
also be forced to redesign product candidates so that we no longer infringe the third-party intellectual property rights. Any of these events, even if we were
ultimately to prevail, could require us to divert substantial financial and management resources that we would otherwise be able to devote to our business.

As the field of RNAi therapeutics matures, patent applications are being processed by national patent offices around the world. There is uncertainty

about which patents they will issue, and, if they do, as to when, to whom, and with what claims. It is likely that there will be significant litigation in the courts
and other proceedings, such as interferences, re-examinations, oppositions, post-grant reviews, inter partes reviews, nullifications, derivation actions, or
cancellation proceedings, in various patent offices relating to patent rights in the RNAi therapeutics field. In many cases, the possibility of appeal or
opposition exists for either us or our opponents, and it may be years before final, unappealable rulings are made with respect to these patents in certain
jurisdictions. The timing and outcome of these and other proceedings is uncertain and may adversely affect our business if we are not successful in defending
the patentability and scope of our pending and issued patent claims or if third parties are successful in obtaining claims that cover our RNAi technology or
any of our product candidates. In addition, third parties may attempt to invalidate our intellectual property rights. Even if our rights are not directly
challenged, disputes could lead to the weakening of our intellectual property rights. Our defense against any attempt by third parties to circumvent or
invalidate our intellectual property rights could be costly to us, could require significant time and attention of our management, and could have a material
adverse effect on our business and our ability to successfully compete in the field of RNAi therapeutics.

There are many issued and pending patents that claim aspects of oligonucleotide chemistry and modifications that we may need to apply to our
therapeutic candidates. There are also many issued patents that claim targeting genes or portions of genes that may be relevant for drugs we wish to develop.
Thus, it is possible that one or more organizations will hold patent rights to which we will need a license. If those organizations refuse to grant us a license to
such patent rights on reasonable terms, we may be unable to market products or perform research and development or other activities covered by these
patents.

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We may license patent rights from third-party owners or licensees. If such owners or licensees do not properly or successfully obtain, maintain, or

enforce the patents underlying such licenses, or if they retain or license to others any competing rights, our competitive position and business prospects may
be adversely affected.

We may, in the future, rely on intellectual property rights licensed from third parties to protect our technology, including licenses that give us rights to
third-party intellectual property that is necessary or useful for our business. We also may license additional third-party intellectual property in the future. Our
success may depend in part on the ability of our licensors to obtain, maintain, and enforce patent protection for our licensed intellectual property, in particular,
those patents to which we have secured exclusive rights. Our licensors may not successfully prosecute the patent applications licensed to us. Even if patents
issue or are granted, our licensors may fail to maintain these patents, such patents may have claim breadth coverage insufficient to protect our interests, may
determine not to pursue litigation against other companies that are infringing these patents, or may pursue litigation less aggressively than we would. Further,
we may not obtain exclusive rights, which would allow for third parties to develop competing products. Without protection for, or exclusive right to, the
intellectual property we license, other companies might be able to offer substantially identical products for sale, which could adversely affect our competitive
business position and harm our business prospects. In addition, we sublicense certain of our rights under our third-party licenses to BI and may sublicense
such rights to current or future collaborators. Any impairment of these sublicensed rights could result in reduced revenue under our collaboration agreement
with BI or result in termination of an agreement by one or more of our existing or any other future collaborators.

We may be unable to protect our intellectual property rights throughout the world.

Obtaining a valid and enforceable issued or granted patent covering our technology in the U.S. and worldwide can be extremely costly. In jurisdictions

where we have not obtained patent protection, competitors may use our technology to develop their own products, and further, may export otherwise
infringing products to territories where we have patent protection, but where it is more difficult to enforce a patent compared to the U.S. We also may face
competition in jurisdictions where we do not have issued or granted patents or where our issued or granted patent claims or other intellectual property rights
are not sufficient to prevent competitor activities in these jurisdictions. The legal systems of certain countries, particularly certain developing countries, make
it difficult to enforce patents and such countries may not recognize other types of intellectual property protection, particularly that relating to
biopharmaceuticals. This could make it difficult for us to prevent the infringement of our patents or marketing of competing products in violation of our
proprietary rights generally in certain jurisdictions. Proceedings to enforce our patent rights in foreign jurisdictions could result in substantial cost and divert
our efforts and attention from other aspects of our business.

We generally file a provisional patent application first (a priority filing) at the USPTO. A U.S. utility application and/or international application under

the Patent Cooperation Treaty (“PCT”) are usually filed within 12 months after the priority filing. Based on the PCT filing, national and regional patent
applications may be filed in the EU, Japan, Australia, and Canada and, depending on the individual case, also in any or all of, inter alia, China, India, South
Korea, Singapore, Taiwan, and South Africa. We have so far not filed for patent protection in all national and regional jurisdictions where such protection
may be available. In addition, we may decide to abandon national and regional patent applications before grant. Finally, the grant proceeding of each national
or regional patent is an independent proceeding which may lead to situations in which applications might be refused in some jurisdictions, while granted by
others. Depending on the country, various scopes of patent protection may be granted on the same product candidate or technology.

The laws of some jurisdictions do not protect intellectual property rights to the same extent as the laws in the U.S., and many companies have
encountered significant difficulties in protecting and defending such rights in such jurisdictions. These difficulties could impact the future commercialization
of our hepatitis B virus infection product candidate because a substantial share of the global market is in non-Western countries. If we or our licensors
encounter difficulties in protecting, or are otherwise precluded from effectively protecting, the intellectual property rights important for our business in such
jurisdictions, the value of these rights may be diminished and we may face additional competition from others in those jurisdictions. Many countries have
compulsory licensing laws under which a patent owner may be compelled to grant licenses to third parties. In addition, many countries limit the enforceability
of patents against government agencies or government contractors. In these countries, the patent owner may have limited remedies, which could materially
diminish the value of such patent. If we or any of our licensors are forced to grant a license to third parties with respect to any patents relevant to our business,
our competitive position in the relevant jurisdiction may be impaired and our business and results of operations may be adversely affected.

We, our licensors, or existing or future collaborators may become subject to third-party claims or litigation alleging infringement of patents or other
proprietary rights or seeking to invalidate patents or other proprietary rights, and we may need to resort to litigation to protect or enforce our patents or
other proprietary rights, all of which could be costly, time consuming, delay, or prevent the development and commercialization of our product
candidates, or put our patents and other proprietary rights at risk.

We, our licensors, or existing or future collaborators may be subject to third-party claims for infringement or misappropriation of patent or other

proprietary rights. We are generally obligated under our license or collaboration agreements to indemnify and hold

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harmless our licensors or collaborators for damages arising from intellectual property infringement by us. If we, our licensors, or existing or future
collaborators are found to infringe a third-party patent or other intellectual property rights, we could be required to pay damages, potentially including treble
damages, if we are found to have willfully infringed. In addition, we, our licensors, or existing or future collaborators may choose to seek, or be required to
seek, a license from a third party, which may not be available on acceptable terms, if at all. Even if a license can be obtained on acceptable terms, the rights
may be non-exclusive, which could give our competitors access to the same technology or intellectual property rights licensed to us. If we fail to obtain a
required license, we, our licensors, or existing or future collaborators may be unable to effectively market product candidates based on our technology, which
could limit our ability to generate revenue or achieve profitability and possibly prevent us from generating revenue sufficient to sustain our operations. In
addition, we may find it necessary to pursue claims or initiate lawsuits to protect or enforce our patent or other intellectual property rights. The cost to us in
defending or initiating any litigation or other proceeding relating to patent or other proprietary rights, even if resolved in our favor, could be substantial, and
litigation would divert our management’s attention. Some of our competitors may be able to sustain the costs of complex patent litigation more effectively
than we can because they have substantially greater resources. Uncertainties resulting from the initiation and continuation of patent litigation or other
proceedings could delay our research and development efforts and limit our ability to continue our operations.

If we were to initiate legal proceedings against a third party to enforce a patent covering one of our products or our technology, the defendant could
counterclaim that our patent is invalid or unenforceable. In patent litigation in the U.S., defendant counterclaims alleging invalidity or unenforceability are
commonplace. Grounds for a validity challenge could be an alleged failure to meet any of several statutory requirements, for example, lack of novelty,
obviousness, or non-enablement. Grounds for an unenforceability assertion could be an allegation that someone connected with prosecution of the patent
withheld relevant information from the USPTO, or made a misleading statement, during patent prosecution. The outcome following legal assertions of
invalidity and unenforceability during patent litigation is unpredictable. With respect to the validity question, for example, we cannot be certain that there is
no invalidating prior art, of which we and the patent examiner were unaware during patent prosecution. If a defendant were to prevail on a legal assertion of
invalidity or unenforceability, we would lose at least part, and perhaps all, of the patent protection on one or more of our products or certain aspects of our
platform technology. Such a loss of patent protection could have a material adverse impact on our business. Patents and other intellectual property rights also
will not protect our technology if competitors design around our protected technology without legally infringing our patents or other intellectual property
rights.

If we fail to comply with our obligations under any license, collaboration, or other agreements, we may be required to pay damages and could lose
intellectual property rights that are necessary for developing and protecting our product candidates and delivery technologies, or we could lose certain
rights to grant sublicenses.

Any future licenses we enter are likely to impose various development, commercialization, funding, milestone, royalty, diligence, sublicensing,
insurance, patent prosecution and enforcement, and other obligations on us. If we breach any of these obligations, or use the intellectual property licensed to
us in an unauthorized manner, we may be required to pay damages, and the licensor may have the right to terminate the license, which could result in us being
unable to develop, manufacture, and sell products that are covered by the licensed technology, or enable a competitor to gain access to the licensed
technology. Moreover, our licensors may own or control intellectual property that has not been licensed to us and, as a result, we may be subject to claims,
regardless of their merit, that we are infringing or otherwise violating the licensor’s rights. In addition, while we cannot currently determine the amount of the
royalty obligations we would be required to pay on sales of future products, if any, the amounts may be significant. The amount of our future royalty
obligations will depend on the technology and intellectual property we use in products that we successfully develop and commercialize, if any. Therefore,
even if we successfully develop and commercialize products, we may be unable to achieve or maintain profitability.

If we are unable to protect the confidentiality of our trade secrets, our business and competitive position would be harmed.

In addition to seeking patent protection for certain aspects of our product candidates and delivery technologies, we also consider trade secrets,
including confidential and unpatented know-how, important to the maintenance of our competitive position. We protect trade secrets and confidential and
unpatented know-how, in part, by entering into non-disclosure and confidentiality agreements with parties who have access to such knowledge, such as our
employees, corporate collaborators, outside scientific collaborators, CROs, contract manufacturers, consultants, advisors, and other third parties. We also
enter into confidentiality and invention or patent assignment agreements with our employees and consultants that obligate them to maintain confidentiality
and assign their inventions to us. Despite these efforts, any of these parties may breach the agreements and disclose our proprietary information, including our
trade secrets, and we may not be able to obtain adequate remedies for such breaches. Enforcing a claim that a party illegally disclosed or misappropriated a
trade secret is difficult, expensive, and time-consuming, and the outcome is unpredictable. In addition, some courts in the U.S. and certain foreign
jurisdictions are less willing or unwilling to protect trade secrets. If any of our trade secrets were to be lawfully obtained or independently developed by a
competitor, we would have no right to prevent them from using that technology or information to compete with us. If any of our trade secrets were to be
disclosed to or independently developed by a competitor, our competitive position would be harmed.

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We are also subject both in the U.S. and outside the U.S. to various regulatory schemes regarding requests for the information we provide to regulatory
authorities, which may include, in whole or in part, trade secrets or confidential commercial information. While we are likely to be notified in advance of any
disclosure of such information and would likely object to such disclosure, there can be no assurance that our challenge to the request would be successful.

We may be, in the future, subject to claims that we or our employees or consultants have wrongfully used or disclosed alleged trade secrets of our
employees’ or consultants’ former employers or their clients. These claims may be costly to defend and if we do not successfully do so, we may be required
to pay monetary damages, may be prohibited from using some of our research and development work, and may lose valuable intellectual property rights
or personnel.

Many of our employees were previously employed at universities or biotechnology or pharmaceutical companies, including our competitors or
potential competitors. From time to time, we have received correspondence from other companies alleging the improper use or disclosure, or inquiring
regarding the use or disclosure, by certain of our employees who have previously been employed elsewhere in our industry, including with our competitors, of
their former employer’s trade secrets or other proprietary information. Responding to these allegations can be costly and disruptive to our business, even
when the allegations are without merit, and can be a distraction to management.

We may be subject to additional claims in the future that these or other employees of the Company have, or we have, inadvertently or otherwise used or

disclosed trade secrets or other proprietary information of their former employers. Litigation may be necessary to defend against these claims. If we fail in
defending current or future claims, in addition to paying monetary damages, we may lose valuable intellectual property rights, personnel, or the ability to use
some of our research and development work. A loss of intellectual property, key research personnel, or their work product could hamper our ability to
commercialize, or prevent us from commercializing, our product candidates, which could severely harm our business.

If our trademarks and trade names are not adequately protected, we may not be able to build name recognition in our markets of interest and our
business may be adversely affected.

Our trademarks or trade names may be challenged, infringed, circumvented or declared generic, or determined to be infringing on other marks. Any
trademark litigation could be expensive. We may not be able to protect our rights to these trademarks and trade names or may be forced to stop using these
names, which we need for name recognition by potential collaborators or customers in our markets of interest. If we are unable to establish name recognition
based on our trademarks and trade names, we may not be able to compete effectively, and our business may be adversely affected.

Risks Related to Government Regulation

We may be unable to obtain U.S. or foreign regulatory approval and, as a result, may be unable to commercialize our product candidates.

Our product candidates are subject to extensive governmental regulations relating to, among other things, research, development, testing, manufacture,

quality control, approval, labeling, packaging, promotion, storage, record keeping, advertising, distribution, sampling, pricing, sales and marketing, safety,
post-approval monitoring and reporting, and export and import of drugs. Rigorous preclinical testing and clinical trials and an extensive regulatory approval
process are required to be successfully completed in the U.S. and in many foreign jurisdictions before a new drug can be marketed. Satisfaction of these and
other regulatory requirements is costly, time consuming, uncertain, and subject to unanticipated delays. It is possible that none of the product candidates we
may develop will obtain the regulatory approvals necessary for us or our collaborators to begin selling them.

We have limited experience in conducting and managing the clinical trials necessary to obtain regulatory approvals, including approval by the FDA as

well as foreign regulatory authorities, such as the EMA. The time required to obtain FDA and foreign regulatory approvals is unpredictable but typically takes
many years following the commencement of clinical trials, depending upon the type, complexity, and novelty of the product candidate. The standards that the
FDA and its foreign counterparts use when regulating us are not always applied predictably or uniformly and can change. Any analysis we perform of data
from preclinical and clinical activities is subject to confirmation and interpretation by regulatory authorities, which could delay, limit, or prevent regulatory
approval. We may also encounter unexpected delays or increased costs due to new government regulations, for example, from future legislation or
administrative action, or from changes in the policy of the FDA or foreign regulatory authorities during the period of product development, clinical trials, and
regulatory review by the FDA or foreign regulatory authorities. It is impossible to predict whether legislative changes will be enacted, or whether FDA or
foreign laws, regulations, guidance, or interpretations will be changed, or what the impact of such changes, if any, may be.

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Because the drugs we are developing may represent a new class of drug, the FDA and its foreign counterparts have not yet established any definitive

policies, practices, or guidelines in relation to these drugs. While we believe the product candidates that we are currently developing are regulated as new
drugs under the Federal Food, Drug, and Cosmetic Act, the FDA could decide to reclassify them, namely to regulate them or other products we may develop
as biologics under the Public Health Service Act. The lack of policies, practices, or guidelines may hinder or slow review by the FDA or foreign regulatory
authorities of any regulatory filings that we may submit. Moreover, the FDA or foreign regulatory authorities may respond to these submissions by defining
requirements we may not have anticipated. Such responses could lead to significant delays in the clinical development of our product candidates. In addition,
because there may be approved treatments for some of the diseases for which we may seek approval, in order to receive regulatory approval, we may need to
demonstrate through clinical trials that the product candidates we develop to treat these diseases, if any, are not only safe and effective, but safer or more
effective than existing products.

Any delay or failure in obtaining required approvals could have a material adverse effect on our ability to generate revenues from the particular product
candidate for which we are seeking approval. Furthermore, any regulatory approval to market a product may be subject to limitations on the approved uses for
which we may market the product or the labeling or other restrictions. Regulatory authorities also may impose requirements for costly post-marketing studies
or clinical trials and surveillance to monitor the safety or efficacy of the product. In addition, the FDA has the authority to require a REMS plan as part of an
NDA or biologics license application or after approval, which may impose further requirements or restrictions on the distribution or use of an approved drug
or biologic, such as limiting prescribing to certain physicians or medical centers that have undergone specialized training, limiting treatment to patients who
meet certain safe-use criteria, and requiring treated patients to enroll in a registry. These limitations and restrictions may limit the size of the market for the
product and affect coverage and reimbursement by third-party payors.

We are also subject to numerous foreign regulatory requirements governing, among other things, the conduct of clinical trials, manufacturing and

marketing authorization, pricing, and third-party reimbursement. The foreign regulatory approval process varies among countries and may include all of the
risks associated with FDA approval described above as well as risks attributable to the satisfaction of local regulations in foreign jurisdictions. Moreover, the
time required to obtain approval may differ from that required to obtain FDA approval. Approval by the FDA does not ensure approval by regulatory
authorities outside the U.S. and vice versa.

If we or current or future collaborators, manufacturers, or service providers fail to comply with healthcare laws and regulations, we or they could be
subject to enforcement actions and substantial penalties, which could affect our ability to develop, market, and sell our products, and may harm our
reputation.

Although we do not currently have any products on the market, if our therapeutic candidates or clinical trials are covered by federal healthcare
programs or other third-party payors, we will be subject to additional healthcare statutory and regulatory requirements and enforcement by the federal, state,
and foreign governments of the jurisdictions in which we conduct our business. Healthcare providers, physicians, and third-party payors play a primary role in
the recommendation and prescription of any therapeutic candidates for which we may obtain marketing approval. Our future arrangements with third-party
payors and customers may expose us to broadly applicable fraud and abuse, transparency, and other healthcare laws and regulations that may constrain the
business or financial arrangements and relationships through which we market, sell, and distribute our therapeutic candidates for which we obtain marketing
approval. Restrictions under applicable federal and state healthcare laws and regulations include, but are not limited to, the following:

the federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, receiving, offering, or

•
providing remuneration, directly or indirectly, overtly or covertly, in cash or in kind, to induce or reward either the referral of an individual for a healthcare
item or service, or the purchasing or ordering of an item or service, for which payment may be made, in whole or in part, under a federal healthcare program
such as Medicare or Medicaid. This statute has been interpreted to apply to arrangements between pharmaceutical manufacturers on the one hand, and
prescribers, purchases, and formulary managers, among other, on the other. A person or entity does not need to have actual knowledge of the statute or
specific intent to violate it in order to have committed a violation;

the federal civil and criminal false claims laws and civil monetary penalty laws, such as the U.S. federal False Claims Act (“FCA”), which imposes

•
criminal and civil penalties, including through civil whistleblower or qui tam actions, against individuals or entities (including manufacturers) for, among
other things, knowingly presenting or causing to be presented, to the federal government, claims for payment that are false or fraudulent, making, using, or
causing to be made or used, a false statement or record material to payment of a false or fraudulent claim or obligation to pay or transmit money or property
to the federal government; or knowingly concealing or knowingly and improperly avoiding, decreasing, or concealing an obligation to pay money to the
federal government. The government may deem manufacturers to have “caused” the submission of false or fraudulent claims by, for example, providing
inaccurate billing or coding information to customer or promoting a product off-label. In addition, the government may assert that a claim including items and
services resulting from a violation of the federal Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the FCA;

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HIPAA includes a fraud and abuse provision which imposes criminal and civil liability for knowingly and willfully executing, or attempting to

•
execute, a scheme to defraud any healthcare benefit program (including private payors), or knowingly and willfully falsifying, concealing, or covering up a
material fact or making any materially false statement in connection with the delivery of or payment for healthcare benefits, items, or services, regardless of
the payor (e.g., public or private). Similar to the federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of the statute or
specific intent to violate it in order to have committed a violation;

HIPAA, as amended by HITECH, and its implementing regulations, which impose obligations on certain covered entity healthcare providers, health

•
plans, and healthcare clearinghouses, as well as their business associates that perform certain services involving the use or disclosure of individually
identifiable health information, including mandatory contractual terms, with respect to safeguarding the privacy, security, and transmission of individually
identifiable health information, and require notification to affected individuals and regulatory authorities of certain breaches of security of individually
identifiable health information. HITECH also created new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly
applicable to business associates, and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the
federal HIPAA laws and seek attorneys’ fees and costs associated with pursuing federal civil actions;

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consumers;

federal and state consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that potentially harm

the federal false statements statute which prohibits knowingly and willfully falsifying, concealing, or covering up a material fact or making any

•
materially false statement in connection with the delivery of or payment for healthcare benefits, items, or services; similar to the federal Anti-Kickback
Statute, a person or entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation;

•
the federal Physician Payment Sunshine Act created under the ACA, and its implementing regulations which require that manufacturers of drugs,
biologicals, devices, and medical supplies for which payment is available under Medicare, Medicaid, and Children’s Health Insurance Program (with certain
exceptions) report annually to the Department of Health and Human Services information related to payments or other transfers of value made to physicians
(defined to include doctors, dentists, optometrists, podiatrists, and chiropractors) and teaching hospitals, as well as ownership and investment interests held by
physicians and their immediate family members. Effective January 1, 2022, these reporting obligations will extend to include transfers of value made to
certain non-physician providers such as physician assistants and nurse practitioners;

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government programs;

federal government price reporting laws, which require us to calculate and report complex pricing metrics in an accurate and timely manner to

analogous state laws and regulations, such as state anti-kickback and false claims laws potentially applicable to sales or marketing arrangements and

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claims involving healthcare items or services reimbursed by nongovernmental third-party payors, including private insurers; and some state laws require
pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated
by the federal government in addition to requiring drug manufacturers to report information related to payments to physicians and other healthcare providers
or marketing expenditures, and state laws governing the privacy and security of health information in certain circumstances, many of which differ from each
other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts;

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payments to non-U.S. officials for the purpose of obtaining or retaining business or otherwise seeking favorable treatment;

The Foreign Corrupt Practices Act (“FCPA”) prohibits companies and their intermediaries from making, or offering or promising to make, improper

the EU General Data Protection Regulation (EU) 2016/679 (“GDPR”), which introduced new data protection requirements in the EU, as well as

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substantial fines for breaches of the data protection rules as of May 25, 2018. The GDPR enhances data protection obligations for processors and controllers
of personal data, including, for example, expanded disclosures about how personal information is to be used, limitations on retention of information,
mandatory data breach notification requirements, and onerous new obligations on services providers. Non-compliance with the GDPR may result in monetary
penalties of up to €20 million or 4% of worldwide revenue, whichever is higher. The GDPR and other changes in laws or regulations associated with the
enhanced protection of certain types of personal data, such as healthcare data or other sensitive information, could greatly increase our cost of providing our
products and services or even prevent us from offering certain services in jurisdictions in which we operate;

the California Consumer Privacy Act (“CCPA”), which creates new individual privacy rights for California consumers (as defined in the law) and

•
places increased privacy and security obligations on entities handling personal data of consumers or households. The CCPA will require covered companies to
provide certain disclosures to consumers about its data collection, use and sharing practices, and to provide affected California residents with ways to opt out
of certain sales or transfers of personal information. The CCPA went into effect on January 1, 2020, and the California Attorney General will commence
enforcement actions against violators beginning July 1, 2020. While there is currently an exception for protected health information that is subject to HIPAA
and clinical trial regulations, as currently written, the CCPA may impact our business activities. The California Attorney General has proposed draft
regulations, which have not been finalized to date, that may further impact our business activities if they are adopted.

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The uncertainty surrounding the implementation of CCPA exemplifies the vulnerability of our business to the evolving regulatory environment related to
personal data and protected health information; and

•
consumers.

federal consumer protection and unfair competition laws, which broadly regulate marketplace activities and activities that potentially harm

Additionally, we may be subject to state and non-U.S. equivalents of each of the healthcare laws described above, among others, some of which may

be broader in scope and may apply regardless of the payor. The approval and commercialization of any of our drug candidates outside the U.S. will also likely
subject us to non-U.S. equivalents of the healthcare laws mentioned above, among other non-U.S. laws.

The scope and enforcement of each of these laws is uncertain and subject to rapid change in the current environment of healthcare reform, especially in

light of the lack of applicable precedent and regulations. Federal and state enforcement bodies have recently increased their scrutiny of interactions between
healthcare companies and healthcare providers, which has led to a number of investigations, prosecutions, convictions, and settlements in the healthcare
industry. Responding to investigations can be time and resource-consuming and can divert management’s attention from the business. Any such investigation
or settlement could increase our costs or otherwise have an adverse effect on our business.

Ensuring that our business arrangements with third parties comply with applicable healthcare laws and regulations could involve substantial costs. If

our operations are found to be in violation of any such requirements, we may be subject to penalties, including civil or criminal penalties, monetary damages,
the curtailment or restructuring of our operations, or exclusion from participation in government contracting, healthcare reimbursement, or other government
programs, including Medicare and Medicaid, any of which could adversely affect our financial results. Although effective compliance programs can mitigate
the risk of investigation and prosecution for violations of these laws, these risks cannot be entirely eliminated. Any action against us for an alleged or
suspected violation could cause us to incur significant legal expenses and could divert our management’s attention from the operation of our business, even if
our defense is successful. In addition, achieving and sustaining compliance with applicable laws and regulations may be costly to us in terms of money, time,
and resources.

If we or current or future collaborators, manufacturers, or service providers fail to comply with applicable federal, state, or foreign laws or regulations,
we could be subject to enforcement actions, which could affect our ability to develop, market, and sell our products successfully and could harm our
reputation and lead to reduced acceptance of our products by the market. These enforcement actions include, among others:

•

•

•

•

•

adverse regulatory inspection findings;

warning or untitled letters;

voluntary or mandatory product recalls or public notification or medical product safety alerts to healthcare professionals;

restrictions on, or prohibitions against, marketing our products;

restrictions on, or prohibitions against, importation or exportation of our products;

•
actions or a finding of an enforcement action;

suspension of review or refusal to approve pending applications or supplements to approved applications, including due to pending enforcement

•

•

•

•

•

•

•

•

exclusion from participation in government-funded healthcare programs;

exclusion from eligibility for the award of government contracts for our products;

a corporate integrity agreement;

FDA debarment of individuals at our Company;

suspension or withdrawal of product approvals;

seizure or administrative detention of products;

injunctions; and

civil and criminal penalties and fines.

Any drugs we develop may become subject to unfavorable pricing regulations, third-party coverage, and reimbursement practices or healthcare reform
initiatives, thereby harming our business.

The regulations that govern marketing approvals, pricing, coverage, and reimbursement for new drugs vary widely from country to country. Some

countries require approval of the sale price of a drug before it can be marketed. In many countries, the

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pricing review period begins after marketing or product licensing approval is granted. In some foreign markets, prescription pharmaceutical pricing remains
subject to continuing governmental control even after initial approval is granted. Although we intend to monitor these regulations, our programs are currently
in the early stages of development and we will not be able to assess the impact of price regulations for a number of years. As a result, we might obtain
regulatory approval for a product in a particular country but then be subject to price regulations that delay our commercial launch of the product and
negatively impact the revenues we are able to generate from the sale of the product in that country.

In the United States and markets in other countries, patients generally rely on third-party payors to reimburse all or part of the costs associated with

their treatment. Adequate coverage and reimbursement from governmental healthcare programs, such as Medicare and Medicaid, and commercial payors is
critical to new product acceptance. Our ability to commercialize any products successfully will also depend in part on the extent to which coverage and
reimbursement for these products and related treatments will be available from government health administration authorities, private health insurers, and other
organizations. Government authorities and third-party payors, such as private health insurers and health maintenance organizations, decide which medications
they will pay for and establish reimbursement levels. The availability of coverage and extent of reimbursement by governmental and private payors is
essential for most patients to be able to afford treatments. Sales of products that we may identify will depend substantially, both domestically and abroad, on
the extent to which the costs of our product candidates will be paid by health maintenance, managed care, pharmacy benefit and similar healthcare
management organizations, or reimbursed by government health administration authorities, private health coverage insurers and other third-party payors.
However, there may be significant delays in obtaining coverage for newly approved drugs. Moreover, eligibility for coverage does not necessarily signify that
a drug will be reimbursed in all cases or at a rate that covers our costs, including research, development, manufacture, sale, and distribution costs. Also,
interim payments for new drugs, if applicable, may be insufficient to cover our costs and may not be made permanent. Thus, even if we succeed in bringing
one or more products to the market, these products may not be considered medically necessary or cost-effective, and the amount reimbursed for any products
may be insufficient to allow us to sell our products on a competitive basis. Because our programs are in the early stages of development, we are unable at this
time to determine their cost effectiveness, or the likely level or method of reimbursement. In addition, obtaining coverage and reimbursement approval of a
product from a government or other third-party payor is a time-consuming and costly process that could require us to provide to each payor supporting
scientific, clinical, and cost-effectiveness data for the use of our product on a payor-by-payor basis, with no assurance that coverage and adequate
reimbursement will be obtained. A payor’s decision to provide coverage for a product does not imply that an adequate reimbursement rate will be approved.
Further, one payor’s determination to provide coverage for a product does not assure that other payors will also provide coverage for the product. Adequate
third-party reimbursement may not be available to enable us to maintain price levels sufficient to realize an appropriate return on our investment in product
development. If reimbursement is not available or is available only at limited levels, we may not be able to successfully commercialize any product candidate
that we successfully develop.

Increasingly, the third-party payors who reimburse patients or healthcare providers, such as government and private insurance plans, are seeking
greater upfront discounts, additional rebates, and other concessions to reduce the prices for pharmaceutical products. If the price we are able to charge for any
products we develop, our product candidates are not considered medically necessary or cost effective, or the reimbursement provided for such products is
inadequate in light of our development and other costs, our return on investment could be adversely affected.

We currently expect that certain drugs we develop may need to be administered under the supervision of a physician on an outpatient basis. Under

currently applicable U.S. law, certain drugs that are not usually self-administered (including injectable drugs) may be eligible for coverage under Medicare
through Medicare Part B. Specifically, Medicare Part B coverage may be available for eligible beneficiaries when the following, among other requirements
have been satisfied:

•
accepted standards of medical practice;

the product is reasonable and necessary for the diagnosis or treatment of the illness or injury for which the product is administered according to

•

the product is typically furnished incident to a physician’s services;

•
(when used for an off-label use); and

the indication for which the product will be used is included or approved for inclusion in certain Medicare-designated pharmaceutical compendia

•

the product has been approved by the FDA.

Average prices for drugs may be reduced by mandatory discounts or rebates required by government healthcare programs or private payors and by any
future relaxation of laws that presently restrict imports of drugs from countries where they may be sold at lower prices than in the U.S. Reimbursement rates
under Medicare Part B would depend in part on whether the newly approved product would be eligible for a unique billing code. Self-administered, outpatient
drugs are typically reimbursed under Medicare Part D, and drugs that are administered in an inpatient hospital setting are typically reimbursed under
Medicare Part A under a bundled payment. It is difficult for us to predict how Medicare coverage and reimbursement policies will be applied to our products
in the

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future and coverage and reimbursement under different federal healthcare programs are not always consistent. Medicare reimbursement rates may also reflect
budgetary constraints placed on the Medicare program.

Third-party payors often rely upon Medicare coverage policies and payment limitations in setting their own reimbursement rates. These coverage
policies and limitations may rely, in part, on compendia listings for approved therapeutics. Our inability to promptly obtain relevant compendia listings,
coverage, and adequate reimbursement from both government-funded and private payors for new drugs that we develop and for which we obtain regulatory
approval could have a material adverse effect on our operating results, our ability to raise capital needed to commercialize products, and our financial
condition.

We expect that these and other healthcare reform measures that may be adopted in the future may result in more rigorous coverage criteria and lower
reimbursement and in additional downward pressure on the price that we receive for any approved product. Any reduction in reimbursement from Medicare
or other government-funded programs may result in a similar reduction in payments from private payors. The implementation of cost containment measures
or other healthcare reforms may prevent us from being able to generate revenue, attain profitability, or commercialize our drugs once marketing approval is
obtained. One example is the establishment in 2006 of the Institute for Clinical and Economic Review, or ICER. ICER evaluates the clinical and economic
value of prescription drugs and issues reports for payors to rely on in making decisions on patient access to new medicines.

In addition, there has been increasing legislative and enforcement interest in the United States with respect to specialty drug pricing practices.
Specifically, there have been several recent U.S. Congressional inquiries and proposed and enacted federal and state legislation designed to, among other
things, bring more transparency to drug pricing, review the relationship between pricing and manufacturer patient assistance programs, and reform
government program reimbursement methodologies for drugs. At the federal level, the U.S. President’s administration’s budget for fiscal year 2020 contains
further drug price control measures that could be enacted during the 2020 legislative session or in other future legislation, including, for example, measures to
permit Medicare Part D plans to negotiate the price of certain drugs under Medicare Part B, to allow some states to negotiate drug prices under Medicaid, and
to eliminate cost sharing for generic drugs for low-income patients. Further, the current U.S. President’s administration released a “Blueprint”, or plan, to
lower drug prices and reduce out of pocket costs of drugs that contains additional proposals to increase drug manufacturer competition, increase the
negotiating power of certain federal healthcare programs, incentivize manufacturers to lower the list price of their products, and reduce the out of pocket costs
of drug products paid by consumers. HHS has already started the process of soliciting feedback on some of these measures and, at the same, is immediately
implementing others under its existing authority. For example, in May 2019, CMS issued a final rule to allow Medicare Advantage Plans the option of using
step therapy, a type of prior authorization, for Part B drugs beginning January 1, 2020. This final rule codified CMS’s policy change that was effective
January 1, 2019. Although a number of these, and other proposed measures will require authorization through additional legislation to become effective,
Congress and the current U.S. President’s administration have each indicated that it will continue to seek new legislative and/or administrative measures to
control drug costs. While some proposed measures will require authorization through additional legislation to become effective, Congress and the current
U.S. President’s administration have each indicated that it will continue to seek new legislative and/or administrative measures to control drug costs. For
example, on September 25, 2019, the Senate Finance Committee introduced the Prescription Drug Pricing Reduction Action of 2019, a bill intended to reduce
Medicare and Medicaid prescription drug prices. The proposed legislation would restructure the Part D benefit, modify payment methodologies for certain
drugs, and impose an inflation cap on drug price increases. An even more restrictive bill, the Lower Drug Costs Now Act of 2019, was introduced in the
House of Representatives on September 19, 2019 and would require HHS to directly negotiate drug prices with manufacturers. The Lower Drug Costs Now
Act of 2019 has passed out of the House of Representatives and was delivered to the Senate on December 16, 2019. However, it is unclear whether either of
these bills will make it through both chambers and be signed into law, and if either is enacted, what effect it would have on our business. Individual states in
the United States have also become increasingly active in passing legislation and implementing regulations designed to control pharmaceutical product
pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency
measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing.

We believe that the efforts of governments and third-party payors to contain or reduce the cost of healthcare and legislative and regulatory proposals to

broaden the availability of healthcare will continue to affect the business and financial condition of pharmaceutical and biopharmaceutical companies. A
number of legislative and regulatory changes in the healthcare system in the U.S. and other major healthcare markets have been proposed, and such efforts
have expanded substantially in recent years. These developments could, directly or indirectly, affect our ability to sell our products, if approved, at a favorable
price.

In 2010, the U.S. Congress passed the ACA, a sweeping law intended to broaden access to health insurance, reduce or constrain the growth of health

spending, enhance remedies against fraud and abuse, add new transparency requirements for the healthcare and health insurance industries, impose new taxes
and fees on the health industry, and impose additional policy reforms. Both the U.S. Congress and the U.S. President have expressed an intention to repeal or
replace the ACA, and as a result, certain sections of the ACA have not been fully implemented or have been effectively repealed. The uncertainty around the
future of the ACA and, in particular, the impact to reimbursement levels, may lead to uncertainty or delay in the purchasing decisions of our customers, which
may in turn

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negatively impact our product sales. If there are not adequate reimbursement levels, our business and results of operations could be adversely affected.

Among the provisions of the ACA addressing coverage and reimbursement of pharmaceutical products of importance to our potential therapeutic

candidates are the following:

•
increases to pharmaceutical manufacturer rebate liability under the Medicaid Drug Rebate Program due to an increase in the minimum basic
Medicaid rebate on most branded prescription drugs and the application of Medicaid rebate liability to drugs used in risk-based Medicaid managed care plans;

creates a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 70% (increased pursuant to the

•
Bipartisan Budget Act of 2018, effective as of 2019) point-of-sale discounts off negotiated prices of applicable brand drugs to eligible beneficiaries during
their coverage gap period, as a condition for the manufacturer’s outpatient drugs to be covered under Medicare Part D;

•
access hospitals, freestanding cancer hospitals, rural referral centers, and sole community hospitals;

the expansion of the 340B Drug Pricing Program to require discounts for “covered outpatient drugs” sold to certain children’s hospitals, critical

•
coverage gap, commonly referred to as the “Donut Hole”;

requirements imposed on pharmaceutical companies to offer discounts on brand-name drugs to patients who fall within the Medicare Part D

•
requirements imposed on pharmaceutical companies to pay an annual non-tax-deductible fee to the federal government based on each company’s
market share of prior year total sales of branded drugs to certain federal healthcare programs, such as Medicare, Medicaid, Department of Veterans Affairs,
and Department of Defense. Since we currently expect our branded pharmaceutical sales to constitute a small portion of the total federal healthcare program
pharmaceutical market, we do not currently expect this annual assessment to have a material impact on our financial condition; and

for products classified as biologics, marketing approval for a follow-on biologic product may not become effective until 12 years after the date on

•
which the reference innovator biologic product was first licensed by the FDA, with a possible six-month extension for pediatric products. After this
exclusivity ends, it may be possible for biosimilar manufacturers to enter the market, which is likely to reduce the pricing for the innovator product and could
affect our profitability if our products are classified as biologics.

Despite initiatives to invalidate the Affordable Care Act, the U.S. Supreme Court has upheld certain key aspects of the legislation, including a tax-

based shared responsibility payment imposed on certain individuals who fail to maintain qualifying health coverage for all or part of a year, which is
commonly referred to as the “individual mandate.” However, as a result of tax reform legislation passed in December 2017, the individual mandate has been
eliminated effective January 1, 2019. On December 14, 2018, a U.S. District Court judge in the Northern District of Texas ruled that the individual mandate
portion of the ACA is an essential and inseverable feature of the ACA, and therefore because the mandate was repealed as part of the Tax Cuts and Jobs Act,
the remaining provisions of the ACA are invalid as well. On December 18, 2019, the Fifth Circuit U.S. Court of Appeals held that the individual mandate is
unconstitutional and remanded the case to the lower court to reconsider its earlier invalidation of the ACA. Pending review, the ACA remains in effect, but it
is unclear at this time what effect the latest ruling will have on the status of the ACA. Litigation and legislation over the ACA are likely to continue, with
unpredictable and uncertain results. We will continue to evaluate the effect that the ACA and its possible repeal and replacement has on our business.

In addition, since January 2017, the U.S. President has signed two Executive Orders designed to delay the implementation of certain provisions of the
ACA or otherwise circumvent some of the requirements for health insurance mandated by the ACA. Further, the current U.S. President’s administration has
concluded that Cost-Sharing Reduction (“CSR”) payments to insurance companies required under the ACA have not received necessary appropriations from
Congress and announced that it will discontinue these payments immediately until such appropriations are made. The loss of the CSR payments is expected to
increase premiums on certain policies issued by qualified health plans under the ACA. Several state Attorneys General filed suit to stop the administration
from terminating the subsidies, but their request for a restraining order was denied by a federal judge in California on October 25, 2017 and again on July 18,
2018. Furthermore, on June 14, 2018, the U.S. Court of Appeals for the Federal Circuit ruled that the federal government was not required to pay more than
$12.0 billion in ACA risk corridor payments to third-party payors who argued were owed to them. On December 10, 2019, the U.S. Supreme Court heard
arguments in Moda Health Plan, Inc. v. United States, which will determine whether the government must make risk corridor payments. The U.S. Supreme
Court’s decisions will be released in the coming months, but we cannot predict how the U.S. Supreme Court will rule. The effects of this gap in
reimbursement on third-party payors, the viability of the ACA marketplace, providers, and potentially our business, are complex and not fully understood.

Other legislative changes have been proposed and adopted in the United States since the Affordable Care Act was enacted. In August 2011, the Budget
Control Act of 2011, among other things, created measures for spending reductions by Congress. A Joint Select Committee on Deficit Reduction, tasked with
recommending a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, was unable to reach required goals, thereby triggering the
legislation’s automatic reduction to several government programs. This includes aggregate reductions of Medicare payments to providers up to 2% per fiscal
year, and, due to subsequent

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legislative amendments, will remain in effect through 2029 unless additional Congressional action is taken. The American Taxpayer Relief Act of 2012
(“ATRA”), among other things, reduced Medicare payments to several providers, including hospitals, imaging centers, and cancer treatment centers, and
increased the statute of limitations period for the government to recover overpayments to providers from three to five years. Moreover, on January 22, 2018,
the U.S. President signed a continuing resolution on appropriations for fiscal year 2018 that delayed the implementation of certain ACA-mandated fees,
including the so-called “Cadillac” tax on certain high cost employer-sponsored insurance plans, the annual fee imposed on certain health insurance providers
based on market share, and the medical device excise tax on non-exempt medical devices; however, on December 20, 2019, the U.S. President signed into law
the Further Consolidated Appropriations Act (H.R. 1865), which repeals the Cadillac tax, the health insurance provider tax, and the medical device excise tax.
It is impossible to determine whether similar taxes could be instated in the future. Also, in 2018, the Trickett Wendler, Frank Mogiello, Jordan McLinn, and
Matthew Bellina Right to Try Act of 2017 provided a federal framework for certain patients with life-threatening diseases to access certain investigational
new drug products that have completed a Phase 1 clinical trial and that are undergoing investigation for FDA approval. Under certain circumstances, eligible
patients can seek treatment without enrolling in clinical trials and without obtaining FDA permission under the FDA expanded access program. There is no
obligation for a drug manufacturer to make its drug products available to eligible patients as a result of the Right to Try Act, but the manufacturer must
develop an internal policy and respond to patient requests according to that policy.

From time to time, legislation is drafted, introduced, and passed in the U.S. Congress that could significantly change the statutory provisions governing

coverage, reimbursement, and marketing of products regulated by CMS or other government agencies. In addition to new legislation, CMS coverage and
reimbursement policies are often revised or interpreted in ways that may significantly affect our business and our products.

Our ability to obtain reimbursement or funding from the federal government may be impacted by possible reductions in federal spending.

U.S. federal government agencies currently face potentially significant spending reductions. The Budget Control Act of 2011 (the “BCA”) established
a Joint Select Committee on Deficit Reduction, which was tasked with achieving a reduction in the federal debt level of at least $1.2 trillion. That committee
did not draft a proposal by the BCA’s deadline. As a result, automatic cuts, referred to as sequestration, in various federal programs were scheduled to take
place, beginning in January 2013, although the American Taxpayer Relief Act of 2012 delayed the BCA’s automatic cuts until March 1, 2013. While the
Medicare program’s eligibility and scope of benefits are generally exempt from these cuts, Medicare payments to providers and Part D health plans are not
exempt. The BCA did, however, provide that the Medicare cuts to providers and Part D health plans would not exceed two percent unless additional
Congressional action is taken. President Obama issued the sequestration order on March 1, 2013, and cuts went into effect on April 1, 2013. Additionally, the
Bipartisan Budget Act of 2015 extended sequestration for Medicare through fiscal year 2027.

More recently, there has been heightened governmental scrutiny over the manner in which manufacturers set prices for their marketed products, which
have resulted in several recent Congressional inquiries and proposed bills designed to, among other things, bring more transparency to product pricing, review
the relationship between pricing and manufacturer patient programs, and reform government program reimbursement methodologies for pharmaceutical
products. Individual states in the U.S. have also become increasingly active in passing legislation and implementing regulations designed to control
pharmaceutical product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost
disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing.

The U.S. federal deficit reached an all-time high in 2019, and efforts to bring spending under control could, among other things, lead to cuts in
Medicare payments to providers, as the Medicare program is frequently mentioned as a target for spending cuts. The full impact on our business of any future
cuts in Medicare or other programs is uncertain. In addition, we cannot predict any impact President Trump’s administration and the U.S. Congress may have
on the federal budget. If federal spending is reduced, anticipated budgetary shortfalls may also impact the ability of relevant agencies, such as the FDA or the
National Institutes of Health, to continue to function at current levels. Amounts allocated to federal grants and contracts may be reduced or eliminated. These
reductions may also impact the ability of relevant agencies to timely review and approve drug research and development, manufacturing, and marketing
activities, which may delay our ability to develop, market, and sell any products we may develop.

 If any of our product candidates receive marketing approval and we or others later identify undesirable side effects caused by the product candidate, our
ability to market and derive revenue from the product candidates could be compromised.

In the event that any of our product candidates receive regulatory approval and we or others identify undesirable side effects, adverse events, or other

problems caused by one of our products, any of the following adverse events could occur, which could result in the loss of significant revenue to us and
materially and adversely affect our results of operations and business:
•

regulatory authorities may withdraw their approval of the product or seize the product;

•

we may need to recall the product or change the way the product is administered to patients;

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•
thereof;

additional restrictions may be imposed on the marketing of the particular product or the manufacturing processes for the product or any component

•
U.S. federal healthcare programs) and private payors;

we may not be able to secure or maintain adequate coverage and reimbursement for our proprietary product candidates from government (including

•
prosecution;

we may be subject to fines, restitution or disgorgement of profits or revenues, injunctions, or the imposition of civil penalties or criminal

•

regulatory authorities may require the addition of labeling statements, such as a “black box” warning or a contraindication;

•
safety or efficacy of the product; we may be required to create a Medication Guide outlining the risks of such side effects for distribution to patients;

regulatory authorities may require us to implement a REMS, or to conduct post-marketing studies or clinical trials and surveillance to monitor the

•

•

•

we could be sued and held liable for harm caused to patients;

the product may become less competitive; and

our reputation may suffer.

Risks Related to Our Common Stock

We no longer qualify as an “emerging growth company” and will be required to comply with certain provisions of the Sarbanes-Oxley Act and can no
longer take advantage of reduced disclosure requirements.

Based on the market value of our common stock held by non-affiliates as of June 30, 2019, we no longer qualify as an “emerging growth company” as

defined in the Jumpstart Our Business Startups Act (“JOBS Act”) as of the year following December 31, 2019. As a result, we may incur additional and
increasing costs to comply with our reporting and other obligations that we had not historically incurred due to our status as an emerging growth company or
as a smaller reporting company. These costs include (1) being required to comply with the auditor attestation requirements of the Sarbanes-Oxley Act of 2002
(“Sarbanes-Oxley Act”) Section 404(b) (“Section 404”), (2) increased disclosure obligations regarding executive compensation in our periodic reports and
proxy statements, and (3) requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute
payments not previously approved. These additional obligations will require us to dedicate internal resources, engage outside consultants, and adopt a detailed
work plan to assess and document the adequacy of internal controls over financial reporting, continue steps to improve control processes, as appropriate,
validate through testing that controls are functioning as documented, and implement a continuous reporting and improvement process for internal controls
over financial reporting.

Our stock price is volatile and purchasers of our common stock could incur substantial losses.

Our stock price has historically fluctuated widely and is likely to continue to be volatile. From January 30, 2014, the first day of trading of our common

stock, through December 31, 2019, the closing sale price of our common stock has ranged between a high of $46.00 per share and a low of $2.45 per share.
The market price for our common stock may be influenced by many factors, including the other risks described in this “Risk Factors” section, and the
following:
•

the success or failure of competitive products or technologies;

•
existing collaborators, or any future collaborators;

delays in initiating or completing and the results of preclinical studies and clinical trials of our product candidates or those of our competitors, our

•

regulatory or legal developments in the U.S. and other countries, especially changes in laws or regulations applicable to our product candidates;

•
introductions or announcements;

introductions and announcements of new products by us, our commercialization collaborators, or our competitors, and the timing of these

•
or sales and marketing terms;

actions taken by regulatory agencies with respect to our or our competitors’ product candidates, products, clinical studies, manufacturing processes,

•

•

actual or anticipated variations in our financial results or those of companies that are perceived to be similar to us;

the success of our or our competitors’ efforts to acquire or in-license additional technologies, products, or product candidates;

•
supply and commercialization partners;

developments concerning our or our competitors’ products or collaborations, including but not limited to, those with sources of manufacturing

•

announcements by us or our competitors of significant acquisitions, strategic collaborations, joint ventures, or capital commitments;

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•

•

•

•

our ability or inability to raise additional capital and the terms on which we raise it;

the recruitment or departure of key personnel;

changes in the structure of healthcare payment systems;

market conditions in the pharmaceutical and biotechnology sectors;

•
comparable companies, or our industry generally;

actual or anticipated changes in earnings estimates or changes in stock market analyst recommendations regarding our common stock, other

•

•

•

•

•

•

our failure or the failure of our competitors to meet analysts’ projections or guidance that we or our competitors may give to the market;

fluctuations in the valuation of companies perceived by investors to be comparable to us;

announcement and expectation of additional financing efforts;

speculation in the press or investment community;

trading volume of our common stock;

sales of our common stock by us or our stockholders;

•
our common stock;

the absence of lock-up agreements with the holders of substantially all of our outstanding shares in connection with follow-on public offerings of

•

•

•

•

•

•

the concentrated ownership of our common stock;

changes in accounting principles;

terrorist acts, acts of war, or periods of widespread civil unrest;

natural disasters and other calamities;

general economic, industry, and market conditions; and

developments concerning complaints or litigation against us.

In addition, the stock markets in general, and the markets for pharmaceutical, biopharmaceutical, and biotechnology stocks in particular have

experienced extreme volatility that has often been unrelated to the operating performance of the issuer. These broad market and industry factors may seriously
harm the market price of our common stock, regardless of our operating performance.

The future issuance of equity or of debt securities that are convertible into equity will dilute our share capital.

We may choose to raise additional capital in the future depending on market conditions, strategic considerations, and operational requirements. To the

extent that additional capital is raised through the issuance of shares or other securities convertible into shares, our stockholders will be diluted. Future
issuances of our common stock or other equity securities, or the perception that such sales may occur, could adversely affect the trading price of our common
stock and impair our ability to raise capital through future offerings of shares or equity securities. We cannot predict the effect, if any, that future sales of
common stock or the availability of common stock for future sales will have on the trading price of our common stock.

The employment agreements with our executive officers may require us to pay severance benefits to officers who are terminated in connection with a
change of control of the Company, which could harm our financial condition.

Our executive officers are parties to employment agreements providing, in the event of a termination of employment in connection with a change of

control of the Company, for significant cash payments for severance and other benefits and acceleration of vesting of up to all outstanding stock options. The
accelerated vesting of options could result in dilution to our existing stockholders and reduce the market price of our common stock. The payment of these
severance benefits could harm our financial condition. In addition, these potential severance payments may discourage or prevent third parties from seeking a
business combination with us.

If securities or industry analysts do not publish research or reports about our business, or if they issue an adverse or misleading opinion regarding our
stock, our stock price and trading volume could decline.

The trading market for our common stock will be influenced by the research and reports that industry or securities analysts publish about us or our

business. If any of the analysts who cover us issue an adverse or misleading opinion regarding us, our business model, our intellectual property, or our stock
performance, or if our target studies and operating results fail to meet the expectations of

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analysts, our stock price would likely decline. If one or more of these analysts cease coverage of us or fail to publish reports on us regularly, we could lose
visibility in the financial markets, which in turn could cause our stock price or trading volume to decline.

Our principal stockholders and management own a significant percentage of our stock and will be able to exert significant control over matters subject to
stockholder approval.

As of December 31, 2019, our executive officers and directors, together with holders of five percent or more of our outstanding common stock and

their respective affiliates, beneficially owned, in the aggregate, approximately 39.3% of our outstanding common stock, including shares subject to
outstanding options and warrants that are exercisable within 60 days after such date, based on the Forms 3 and 4 and Schedules 13D and 13G filed by them
with the SEC. As of December 31, 2019, our chief executive officer, Douglas M. Fambrough, III, Ph.D., beneficially owned 1,890,760, or approximately
2.6%, of our outstanding common stock including outstanding vested options; Mr. Fambrough beneficially owned 2,401,700 shares or approximately 3.4% of
our outstanding common stock including outstanding vested and unvested options. As a result, these stockholders, if acting together, will continue to have
significant influence over the outcome of corporate actions requiring stockholder approval, including the election of directors, any merger, consolidation, or
sale of all or substantially all of our assets, and any other significant corporate transaction. The interests of these stockholders may not be the same as, or may
even conflict with, the interests of our other stockholders. For example, these stockholders could delay or prevent a change of control of our Company, even if
such a change of control would benefit our other stockholders, which could deprive our stockholders of an opportunity to receive a premium for their
common stock as part of a sale of our Company or our assets and might affect the prevailing market price of our common stock. The significant concentration
of stock ownership may adversely affect the trading price of our common stock due to investors’ perception that conflicts of interest may exist or arise.

Anti-takeover provisions in our charter documents and under Delaware law could make an acquisition of us, which may be beneficial to our
stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management.

Provisions in our amended and restated certificate of incorporation and our amended and restated bylaws may delay or prevent an acquisition of us or a

change in our management. In addition, these provisions may frustrate or prevent any attempts by our stockholders to replace or remove our current
management by making it more difficult for stockholders to replace members of our board of directors. Because our board of directors is responsible for
appointing the members of our management team, these provisions could in turn affect any attempt by our stockholders to replace current members of our
management team. These provisions include:

•

a prohibition on actions by our stockholders by written consent;

•
a requirement that special meetings of stockholders, which the Company is not obligated to call more than once per calendar year, be called only by
the chairman of our board of directors, our chief executive officer, our board of directors pursuant to a resolution adopted by a majority of the total number of
authorized directors, or, subject to certain conditions, by our secretary at the request of the stockholders holding of record, in the aggregate, shares entitled to
cast not less than ten percent of the votes at a meeting of the stockholders (assuming all shares entitled to vote at such meeting were present and voted);

•

advance notice requirements for election to our board of directors and for proposing matters that can be acted upon at stockholder meetings; and

•
directors may determine.

the authority of the board of directors to issue preferred stock, such as the Redeemable Convertible Preferred, with such terms as the board of

Moreover, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware General Corporation Law, as

amended, which prohibits a person who owns in excess of 15 percent of our outstanding voting stock from merging or combining with us for a period of three
years after the date of the transaction in which the person acquired in excess of 15 percent of our outstanding voting stock, unless the merger or combination
is approved in a prescribed manner. These provisions would apply even if the proposed merger or acquisition could be considered beneficial by some
stockholders.

We incur increased costs as a result of operating as a public company, and our management is required to devote substantial time to new compliance
initiatives and corporate governance practices.

As a public company, we incur, and we will continue to incur significant legal, accounting, and other expenses.

The Sarbanes-Oxley Act, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of The Nasdaq Global Select

Market, and other applicable securities rules and regulations impose various requirements on public companies, including establishment and maintenance of
effective disclosure and financial controls and corporate governance practices. Our management and other personnel need to devote a substantial amount of
time to these compliance initiatives. Moreover, these rules

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and regulations increase our legal and financial compliance costs and make some activities more time-consuming and costly. For example, we expect that
these rules and regulations make it more difficult and more expensive for us to obtain director and officer liability insurance, which in turn could make it
more difficult for us to attract and retain qualified members of our board of directors. However, these rules and regulations are often subject to varying
interpretations, in many cases due to their lack of specificity, and, as a result, their application in practice may evolve over time as new guidance is provided
by regulatory and governing bodies. This could result in continuing uncertainty regarding compliance matters and higher costs necessitated by ongoing
revisions to disclosure and governance practices.

As of December 31, 2019, we are no longer an emerging growth company and will be required to comply with the rules of the SEC that implement

Section 404(b). To achieve compliance with Section 404(b) within the prescribed period, we are engaged in a process to document and evaluate our internal
control over financial reporting, which is both costly and challenging. In this regard, we are dedicating internal resources, engaging outside consultants, and
have adopted a detailed work plan to assess and document the adequacy of internal control over financial reporting, continue steps to improve control
processes as appropriate, validate through testing that controls are functioning as documented, and implement a continuous reporting and improvement
process for internal controls over financial reporting. Despite our efforts, there is a risk that we will not be able to conclude that our internal control over
financial reporting is effective as required by Section 404 in one or more future periods. If we identify one or more material weaknesses, it could result in an
adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements. In addition, if we are not able to continue to
meet these requirements, we may not be able to remain listed on The Nasdaq Global Select Market.

Because we do not anticipate paying any cash dividends on our capital stock in the foreseeable future, capital appreciation, if any, will be your sole
source of gain.

We have never declared or paid cash dividends on our common stock. We currently intend to retain all of our future earnings, if any, to finance the

growth and development of our business. As a result, capital appreciation, if any, of our common stock will be the sole source of gain of our common
stockholders for the foreseeable future.

We may incur significant costs from class action litigation due to our historical or expected stock volatility.

Our stock price has fluctuated and may fluctuate for many reasons, including as a result of public announcements regarding the progress of our
development efforts or the development efforts of our collaborators or competitors, the addition or departure of our key personnel, variations in our quarterly
operating results, and changes in market valuations of pharmaceutical and biotechnology companies. This risk is especially relevant to us because
pharmaceutical and biotechnology companies have experienced significant stock price volatility in recent years. When the market price of a stock has been
volatile as our stock price has been and may be, holders of that stock have occasionally brought securities class action litigation against the company that
issued the stock. If any of our stockholders were to bring a lawsuit of this type against us, even if the lawsuit is without merit, we could incur substantial costs
defending the lawsuit. The lawsuit could also divert the time and attention of our management.

Our amended and restated bylaws designate the Court of Chancery of the State of Delaware as the sole and exclusive forum for certain types of actions
and proceedings that may be initiated by our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes
with us or our directors, officers, or employees.

Our amended and restated bylaws provide that, subject to limited exceptions, the Court of Chancery of the State of Delaware will be the sole and
exclusive forum for any derivative action or proceeding brought on our behalf, any action asserting a claim of breach of a fiduciary duty owed by any of our
directors, officers, or other employees to us or our stockholders, any action asserting a claim against us arising pursuant to any provision of the Delaware
General Corporation Law, as amended, our amended and restated certificate of incorporation or our amended and restated bylaws, any action to interpret,
apply, enforce, or determine the validity of our amended and restated certificate of incorporation or our amended and restated bylaws, any action to interpret,
apply, enforce or determine the validity of our amended and restated certificate of incorporation or our amended and restated bylaws, or any other action
asserting a claim against us that is governed by the internal affairs doctrine. Any person or entity purchasing or otherwise acquiring any interest in shares of
our capital stock shall be deemed to have notice of and to have consented to the provisions of our amended and restated certificate of incorporation described
above. This choice of forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or our
directors, officers, or other employees, which may discourage such lawsuits against us and our directors, officers, and employees. Alternatively, if a court
were to find these provisions of our amended and restated certificate of incorporation inapplicable to, or unenforceable in respect of, one or more of the
specified types of actions or proceedings, we may incur additional costs associated with resolving such matters in other jurisdictions, which could adversely
affect our business and financial condition.

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Our stockholders may experience significant dilution as a result of future equity offerings and exercise of outstanding options.

In order to raise additional capital, we may in the future offer additional shares of our common stock or other securities convertible into or

exchangeable for our common stock, as we did with the Redeemable Convertible Preferred, which was converted into common stock in December 2017 and
with the follow-on offerings of our common stock in December 2017 and September 2018. We cannot assure you that we will be able to sell shares or other
securities in any offering at a price per share that is equal to or greater than the price paid by our existing shareholders, and investors purchasing shares or
other securities in the future could have rights superior to existing stockholders. The price per share at which we sell additional shares of our common stock or
other securities convertible into or exchangeable for our common stock in future transactions may be higher or lower than the price per share paid by our
existing stockholders.

In addition, we have a significant number of securities allowing for the purchase of our common stock. As of February 24, 2020, we also had
7,781,915 shares of common stock reserved for future issuance under our stock incentive plans. As of that date, there were also stock options and awards to
purchase 15,045,098 shares of our common stock outstanding and warrants to purchase 2,198 shares of our common stock outstanding. The exercise of
outstanding options and warrants having an exercise price per share that is less than the offering price per share paid by our existing stockholders will increase
dilution to such stockholders.

Future sales of our common stock in the public market could cause our stock price to fall.

Sales of a substantial number of shares of our common stock in the public market, or the perception that these sales might occur, could depress the

market price of our common stock and could impair our ability to raise capital through the sale of additional equity securities. As of February 24, 2020, we
had 73,750,617 shares of common stock outstanding, all of which, other than shares held by our directors and certain officers, were eligible for sale in the
public market, subject in some cases to compliance with the requirements of Rule 144, including the volume limitations and manner of sale requirements. In
addition, shares of common stock issuable upon exercise of outstanding options and shares reserved for future issuances under our stock incentive plans will
become eligible for sale in the public market to the extent permitted by applicable vesting requirements and subject in some cases to compliance with the
requirements of Rule 144.

Sales of shares issued in private placements may cause the market price of our shares to decline.

In April 2017, we issued 700,000 shares of the Redeemable Convertible Preferred in a private placement, which were convertible into shares of our
common stock at an agreed conversion rate. In December 2017, all shares of Redeemable Convertible Preferred were converted into shares of our common
stock. We granted the holders of Redeemable Convertible Preferred certain demand, shelf, and “piggyback” registration rights with respect to the shares of
common stock issued upon conversion of the Redeemable Convertible Preferred. Such registration rights continue subsequent to the conversion and
repurchase of the Redeemable Convertible Preferred with respect to the shares of common stock issued in such conversion. In accordance with such
registration rights, we filed a shelf registration statement on Form S-3 covering the resale of 24,491,663 shares of our common stock by the former holders of
Redeemable Convertible Preferred. The registration statement was declared effective on May 9, 2018, and all shares of common stock issued upon conversion
of the Redeemable Convertible Preferred may now be freely sold in the open market. Additionally, we issued 983,208 shares of our common stock to
Alnylam in April 2018, 835,834 shares of our common stock to Alexion in October 2018, 5,414,185 shares of our common stock to Lilly in December 2018,
and 2,279,982 shares of our common stock to Novo in December 2019. The shares issued to Alnylam are freely tradeable in the open market, subject to
certain volume limitations and compliance with applicable securities laws. The shares issued to Alexion may be freely sold in the open market subject to
compliance with the requirements of Rule 144, subject to compliance with applicable securities laws. The shares issued to Novo are subject to a lock-up
period but, following the expiration of such lock-up periods, such shares of our common stock may be freely sold in the open market subject to compliance
with the requirements of Rule 144, subject to compliance with applicable securities laws. The sale of a significant amount of these shares in the open market
or the perception that these sales may occur could cause the market price of our common stock to decline or become highly volatile.

ITEM 1B.

UNRESOLVED STAFF COMMENTS

None.

ITEM 2.

PROPERTIES

On January 2, 2019, we entered into a seven-year lease for 80,872 square feet of office and laboratory space located in Lexington, Massachusetts. This

location became the Company’s corporate headquarters during November 2019.

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On January 14, 2020, we entered into a real property lease agreement with a 125-month term for 61,282 square feet of office space in Lexington,

Massachusetts. The term of the lease has not yet commenced.

Our former headquarters in Cambridge, Massachusetts, where we lease 37,084 square feet of office and laboratory space, continues to support the

business. The lease term for our office and laboratory space in Cambridge, Massachusetts, commenced in December 2014 for six years.

On August 26, 2019, we entered into an 87-month term lease agreement for 15,781 square feet of office space in Boulder, Colorado. We intend to
relocate our currently remote Colorado employees to this facility upon lease commencement, which we currently anticipate will occur in the second quarter of
2020.

We believe that suitable additional or alternative space will be available as needed on commercially reasonable terms.

ITEM 3.

LEGAL PROCEEDINGS

From time to time we may be subject to legal proceedings, claims, and litigation arising in the ordinary course of business. We are not currently a party

to or aware of any proceedings that we believe will have, individually or in the aggregate, a material adverse effect on our business, financial condition, or
results of operations. Any future litigation could result in substantial costs and divert our management’s attention and resources, which could cause serious
harm to our business, operating results, and financial condition. We maintain liability insurance; however, if any costs or expenses associated with this or any
other litigation exceed our insurance coverage, we may be forced to bear some or all of these costs or expenses directly, which could be substantial.

ITEM 4.

MINE SAFETY DISCLOSURES

Not applicable.

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PART II

ITEM 5.

MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF
EQUITY SECURITIES

Market Information for Common Stock

Our common stock trades on The Nasdaq Global Select Market under the symbol “DRNA.”

Equity Compensation Plans

For information regarding equity compensation plans, see Item 12 of this Annual Report on Form 10-K.

Holders of Record

As of February 24, 2020, there were approximately eight holders of record of our common stock. Because many of our shares of common stock are
held by brokers and other institutions on behalf of stockholders, we are unable to estimate the total number of beneficial stockholders represented by these
record holders.

Dividend Policy

We currently intend to retain future earnings, if any, for use in the operation of our business and to fund future growth. We have never declared or paid

cash dividends on our common stock and we do not intend to pay any cash dividends on our common stock for the foreseeable future. Any future
determination related to our dividend policy will be made at the discretion of our board of directors in light of conditions then existing, including factors such
as our results of operations, financial condition and requirements, business conditions, and covenants under any applicable contractual arrangements.

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Performance Graph

The following graph illustrates a comparison of the total cumulative stockholder return on our common stock to The Nasdaq Composite and The
Nasdaq Biotechnology indices for each of the last five fiscal years ended December 31, 2019, assuming an initial investment of $100 on December 31, 2014.
The stock price performance on the following graph is not necessarily indicative of future stock price performance. This performance graph shall not be
deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or incorporated by reference into any of our filings under the
Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Recent Sales of Unregistered Securities

On December 27, 2019, the Company issued 2,279,982 shares (the “Novo Shares”)  of the Company’s common stock, par value $0.0001 per share, to
Novo Nordisk A/S (“Novo”), at a purchase price of $21.93 per share, for an aggregate purchase price of approximately $50.0 million. The Novo Shares were
offered and issued in a private placement exempt from registration pursuant to Section 4(a)(2) of the Securities Act of 1933, as amended, or Regulation D
promulgated thereunder, as a transaction by an issuer not involving a public offering.

Use of Proceeds from Initial Public Offering of Common Stock

Not applicable.

Purchases of Equity Securities by the Issuer and Affiliated Parties

None.

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ITEM 6.

SELECTED FINANCIAL DATA

The following selected consolidated financial data has been derived from our audited consolidated financial statements as of December 31, 2019 and

2018 and for the fiscal years ended December 31, 2019, 2018, and 2017, and are included elsewhere in this Annual Report on Form 10-K. The information set
forth below should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” included in Item
7 of this Annual Report on Form 10-K, and with our consolidated financial statements and notes thereto, included in Item 8 of this Annual Report on Form
10-K. The information set forth below is not necessarily indicative of our future results of operations or financial condition.

(in thousands, except share and per share data)
Results of operations data
Revenue (b)
Net loss

Net loss attributable to common stockholders

Net loss per share attributable to common stockholders

– basic and diluted

Weighted average common shares outstanding – basic

$

$

$

$

2019

2018

2017 (a)

2016

2015

YEAR ENDED
DECEMBER 31,

23,904   $

(120,459)   $

(120,459)   $

6,176   $

(88,853)   $

(88,853)   $

1,030   $

(60,200)   $

(80,292)   $

—   $

(59,513)   $

(59,513)   $

—

(62,839)

(62,839)

(1.76)   $

(1.60)   $

(3.66)   $

(2.87)   $

(3.09)

and diluted

68,428,046  

55,616,092  

21,917,415  

20,719,761  

20,320,628

____________________________ 
(a)  Reflects the retrospective adoption of the new revenue recognition accounting standard, which the Company adopted on January 1, 2018. Refer to Note 2 to our consolidated financial

(b) 

statements (see Item 8 of this Annual Report on Form 10-K) for more information.
In 2018, we reclassified income from government grants of $1.1 million, $0.3 million, and $0.2 million as offsets to research and development expenses for the years ended December 31,
2017, 2016, and 2015, respectively, to conform to the presentation in 2018.

(in thousands)
Financial condition data

Cash and cash equivalents

Held-to-maturity investments

Total assets

Total noncurrent liabilities

Total stockholders' equity

2019

2018

2017 (a)

2016

2015

DECEMBER 31,

$

$

$

$

$

152,816   $

196,065   $

597,409   $

203,479   $

152,195   $

54,239   $

248,387   $

409,041   $

114,293   $

200,693   $

68,789   $

44,889   $

121,002   $

3,090   $

20,865   $

25,009   $

51,252   $

—   $

101,086   $

41,208   $

56,058

38,551

100,023

—

91,022

____________________________ 
(a)  Reflects the retrospective adoption of the new revenue recognition accounting standard, which the Company adopted on January 1, 2018. Refer to Note 2 to our consolidated financial

statements (see Item 8 of this Annual Report on Form 10-K) for more information.

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ITEM 7.

MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially from those

discussed here. Factors that could cause or contribute to such differences include, but are not limited to, those discussed in this section as well as factors
described in Part I, Item 1A – “Risk Factors” and “Special Note Regarding Forward-Looking Statements” included elsewhere in this Annual Report on
Form 10-K.

Overview

Dicerna™ Pharmaceuticals, Inc. (“we”, “us,” “our,” “the Company,” or “Dicerna”) is a biopharmaceutical company using ribonucleic acid (“RNA”)
interference (“RNAi”) to develop medicines that silence genes that cause or contribute to disease. The Company’s proprietary GalXC™ technology is being
applied to develop what we believe will be potent, selective, and safe RNAi therapies to treat diseases involving the liver, including rare diseases, chronic
liver diseases, cardiometabolic diseases, and viral infectious diseases. As we further enhance our GalXC technology, we aim to extend our focus beyond the
liver to include central nervous system (“CNS”) diseases and diseases involving other bodily tissues. Dicerna aims to treat a broad range of diseases by
addressing the underlying causes of illness, focusing on target genes where connections between gene and disease are well understood and documented.
Dicerna intends to discover, develop, and commercialize novel therapeutics either on its own or in collaboration with pharmaceutical partners. Dicerna has
strategic collaborations with Novo Nordisk A/S (“Novo”), F. Hoffmann-La Roche Ltd and Hoffmann-La Roche Inc. (together, “Roche”), Eli Lilly and
Company (“Lilly”), Alexion Pharmaceuticals, Inc. (together with its affiliates, “Alexion”), and Boehringer Ingelheim International GmbH (“BI”).

All of our GalXC drug discovery and development efforts are based on the therapeutic modality of RNAi, a highly potent and specific mechanism for
silencing the activity of a targeted gene. In this naturally occurring biological process, double-stranded RNA molecules induce the enzymatic destruction of
the messenger ribonucleic acid (“mRNA”) of a target gene that contains sequences that are complementary to one strand of the therapeutic double-stranded
RNA molecule. Our approach is to design proprietary double-stranded RNA molecules that have the potential to engage the enzyme Dicer and initiate an
RNAi process to silence a specific target gene. Our GalXC RNAi platform utilizes a proprietary structure of double-stranded RNA molecules. For our current
clinical programs, our GalXC RNAi platform has been configured for subcutaneous delivery to the liver. Due to the enzymatic nature of RNAi, a single
GalXC molecule incorporated into the RNAi machinery can destroy hundreds or thousands of mRNAs from the targeted gene.

The GalXC RNAi platform supports Dicerna’s long-term strategy to retain a full or substantial ownership stake in our programs, subject to the
evaluation of potential licensing opportunities as they may arise, and to invest internally in programs for diseases with focused patient populations, such as
certain rare diseases. These certain rare disease programs, which include our nedosiran (formerly DCR-PHXC) and DCR-A1AT programs, represent
opportunities that we believe carry a relatively higher probability of success, with genetically and molecularly defined disease markers, high unmet medical
need, a limited number of centers of excellence to facilitate reaching these patients, and the potential for more rapid clinical development paths to regulatory
approval. For more complex diseases with multiple gene dysfunctions and/or larger patient populations, we plan to pursue collaborations that can provide the
enhanced scale, resources, and commercial infrastructure required to maximize these prospects.

We currently view our operations and manage our business as one segment which encompasses the discovery, research, and development of treatments

based on our RNAi technology platform.

Executive Summary

Our results of operations for the year ended December 31, 2019, compared to the prior year, reflect the following:

•

•

•

On January 1, 2019, we implemented the new lease accounting standard issued by the Financial Accounting Standards Board, Leases (Topic
842). Upon adoption, we recorded a right-of-use asset of $2.7 million which is recorded in noncurrent assets in the consolidated balance sheets, a
short-term lease liability of $1.4 million, and a long-term lease liability of $1.4 million. As of December 31, 2019, the right-of-use asset was
$30.1 million, and the short-term and long-term lease liabilities were $3.4 million and $20.1 million, respectively.

On January 2, 2019, we entered into a seven-year non-cancelable real property lease agreement for 80,872 square feet of laboratory and office
space in Lexington, Massachusetts. This location became our corporate headquarters and research facility during the fourth quarter of 2019.

On January 4, 2019, we entered into a non-cancelable real property sublease agreement for 9,653 square feet of office space in Cambridge,
Massachusetts. The term of the sublease commenced on January 11, 2019 and extends through the sublease expiration date of July 30, 2021.

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•

•

•

•

•

•

•

On August 26, 2019, we entered into an 87-month non-cancelable real property lease agreement for 15,781 square feet of office space in Boulder,
Colorado. On February 4, 2020, we amended this lease to allow for the rental of an additional 6,985 square feet of office space. We intend to
relocate our currently remote Colorado employees to a portion of this facility upon lease commencement, which we anticipate will occur in the
first quarter of 2020, and plan to occupy the remainder of the space commencing in the second quarter of 2020.

On October 30, 2019, we entered into the Roche Collaboration Agreement. Under the terms of the Roche Collaboration Agreement, we and
Roche will seek to progress RG6346, our investigational therapy in Phase 1 clinical development, toward worldwide development and
commercialization as well as an option for the companies to collaborate in the discovery, development, and commercialization of oligonucleotide
therapeutics intended for the treatment of HBV. We were entitled to an upfront payment of $200.0 million. We are also eligible to receive
additional payments totaling up to approximately $1.47 billion, which includes payments upon achievement of specified development, regulatory,
and commercial milestones for RG6346. In addition, the Roche Collaboration Agreement provides that Roche will pay us up to mid-teens percent
royalties on product sales. We also have an option to co-fund the development of products under the agreement and, if exercised, receive high
twenties to mid-thirties royalty rates on the net sales of products in the U.S. If we exercise the co-funding option, we also have an option to co-
promote products containing RG6346 in the U.S.

On November 15, 2019, we entered into the Novo Collaboration Agreement. Under the terms of the Novo Collaboration Agreement, we and
Novo will seek to use our proprietary GalXC™ RNAi platform technology to progress novel therapies for the treatment of liver-related
cardiometabolic diseases towards clinical development and commercialization. We were entitled to an upfront payment of $175.0 million. In
connection with the Novo Collaboration Agreement, Novo made a $50.0 million equity investment in Dicerna at a premium pursuant to the Novo
Share Issuance Agreement, which we received in December 2019. We are also eligible to receive an additional $75.0 million ($25.0 million at the
end of each of the first three years of the Novo Collaboration Agreement), contingent upon the Company delivering GalXC™ molecules for a
defined number of targets, and additional payments totaling up to approximately $357.5 million per target upon achievement of specified
development, regulatory, and commercial milestones. In addition, the Novo Collaboration Agreement provides that Novo will pay us up to mid-
single-digits to mid-teens royalties on product sales on a country-by-country and product-by-product basis until the later of 10 years after the date
of first commercial sale of each product in such country, expiration of specified patent rights in such country, or the expiration of specified
regulatory exclusivity in such country for GalXC products, subject to royalty step-down provisions set forth in the agreement.

In November 2019, we entered into an initial five-year agreement with a supplier for the development, manufacture, and supply of clinical and
commercial product. In January 2020, we executed an amendment to this agreement which allows for advance preferential scheduling to the
manufacturing line.

In December 2019, Alexion exercised its option for the exclusive rights to two additional targets within the complement pathway for the
discovery and development of GalXC™ RNAi molecules. This exercise expands Dicerna and Alexion’s existing research collaboration and
license agreement to now encompass four targets within the complement pathway. In connection with the option exercise, Alexion paid Dicerna a
total of $20.0 million, or $10.0 million in option exercise fees per additional target during December 2019 that will be recognized into revenue as
the related services are performed.

On January 14, 2020, we entered into a non-cancelable 10-year real property lease agreement for 61,282 square feet of office space in Lexington,
Massachusetts. The term of the lease has not yet commenced.

Revenue during the year ended December 31, 2019 reflects $13.1 million, $4.4 million, and $6.3 million from the Lilly, Alexion, and BI
collaborations, respectively, compared to $0.1 million and $6.1 million from the Alexion and BI collaborations, respectively, during the prior
year.

Development Programs

In choosing which development programs to internally advance, we apply the scientific, clinical, and commercial criteria that we believe allow us to
best leverage our GalXC RNAi platform and maximize value. Using our GalXC RNAi technology, and applying the criteria of our development focus, we
have created a pipeline of core therapeutic programs for development by Dicerna. For opportunities that were not selected as a core program opportunity, we
have sought partners to fund the discovery, and subsequently drive the development of, these non-core opportunities in exchange for upfront payments,
milestone payments, royalties on product sales, and potentially other economic and operational arrangements. Our current collaborations with Novo, Lilly,
Alexion, and BI resulted from this effort. For core programs targeting rare diseases, we intend to develop these programs internally through approval. For
core programs targeting larger populations, we may seek development partners, such as our collaboration with Roche on RG6346, under various economic
and operational arrangements. Together, our core program pipeline and our pipeline of non-core collaborative programs constitute a broad and growing
therapeutic pipeline that we believe may result in multiple valuable approved products based on our GalXC technology.

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In addition to the programs listed in our pipeline, we are exploring a variety of potential programs involving gene targets in the liver, CNS, and other

tissues, which we may elevate in the future to be either a core program or a non-core collaborative program. Under our collaborations with Novo, Roche, and
Lilly, our collaborators have rights to nominate additional programs for discovery by Dicerna and subsequent development by the nominating collaborator,
and which will become part of our non-core pipeline.

Our four core programs are: nedosiran for the treatment of primary hyperoxaluria (“PH”), RG6346 (formerly DCR‑HBVS) for the treatment of chronic
hepatitis B virus (“HBV”) infection, DCR-A1AT for the treatment of alpha-1 antitrypsin (“A1AT”) deficiency-associated liver disease, and a program for the
treatment of a common disease involving the liver.

The table below sets forth the state of development of our various GalXC RNAi platform product candidates as of February 27, 2020.

Status of Dicerna Programs

Our current GalXC RNAi platform development programs are as follows:

Nedosiran for Primary Hyperoxaluria

We are developing our lead GalXC product candidate, nedosiran, for the treatment of primary hyperoxaluria (“PH”) type 1 (“PH1”), PH type 2

(“PH2”), and PH type 3 (“PH3”), which is in the pivotal phase of clinical development. PH is a family of severe, ultra-rare, genetic liver disorders
characterized by the overproduction of oxalate, a highly insoluble metabolic end-product that is eliminated from the body mainly by the kidneys. In patients
with PH, the kidneys are unable to eliminate fully the large amount of oxalate that is produced. The accumulation of oxalate compromises the renal system,
which may result in severe damage to the kidneys and other organs.

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PH encompasses three genetically distinct, autosomal-recessive, inborn errors of glyoxylate metabolism characterized by the over-production of

oxalate. PH1, PH2, and PH3 are each characterized by a specific enzyme deficiency. PH1 is caused by a deficiency of glyoxylate-aminotransferase, PH2 is
caused by a deficiency of glyoxylate reductase/hydroxypyruvate reductase, and PH3 is caused by a deficiency of 4-hydroxy-2-oxoglutarate aldolase. Patients
with PH are predisposed to the development of recurrent urinary tract (urolithiasis) and kidney (nephrolithiasis) stones, composed of calcium oxalate crystals.
Stone formation is accompanied by nephrocalcinosis in some patients with PH1 and PH2. This deposition of calcium oxalate crystals in the renal parenchyma
produces tubular toxicity and renal damage that is compounded by the effects of renal calculi-related obstruction and frequent superimposed infections. Based
on evaluation of genome sequence databases, there may be as many as 16,000 people with PH in the U.S. and major European countries.

As of November 2019, we completed all study participant dosing and follow-up in PHYOX™1, a Phase 1 single-ascending-dose study of nedosiran in

healthy volunteers and study participants with PH type 1 (“PH1”) and PH type 2 (“PH2”). The primary objective of the study was to evaluate the safety,
tolerability, pharmacokinetics, and pharmacodynamics of single-ascending doses of nedosiran. Secondary endpoints included the change in 24-hour urinary
oxalate excretion from baseline, defined as the mean of two 24-hour collections during screening. The trial was divided into two groups:

• Group A was a placebo-controlled, single-blind study and included 25 healthy volunteers at a single site in the United Kingdom with five cohorts

dosed at 0.3, 1.5, 3.0, 6.0, or 12.0 mg/kg of nedosiran or placebo (3:2 randomization).

• Group B was an open-label study and included 18 participants, 15 with PH1 and three with PH2, and included three cohorts of participants dosed

at 1.5, 3.0, and 6.0 mg/kg of nedosiran and a fourth cohort with mixed dosing. Group B participants were enrolled among three sites in
the European Union, one in the United Kingdom, and one site in the United States.

RG6346 for Chronic Hepatitis B Virus Infection

Our GalXC RNAi platform-based product candidate for the treatment of chronic HBV infection, RG6346 (formerly DCR-HBVS), is currently being
tested in a Phase 1 clinical trial. HBV is reported to be the most common serious liver infection affecting an estimated 292 million people globally. Chronic
HBV infection is characterized by the presence of the HBV surface antigen (“HBsAg”) for six months or more.

The DCR-HBVS-101 clinical trial is a Phase 1, randomized, placebo-controlled, double-blind study designed to evaluate the safety and tolerability of

RG6346 in healthy volunteers and in patients with non-cirrhotic chronic HBV. Secondary objectives are to characterize the pharmacokinetic profile of
RG6346 and to evaluate preliminary antiviral efficacy, as well as characterize the pharmacodynamics of HBsAg and HBV DNA levels in blood. The DCR-
HBVS-101 clinical trial is divided into three phases or groups:

•

•

•

Group A is a single-ascending-dose arm in which 30 healthy volunteers received a dose of RG6346 (0.1, 1.5, 3.0, 6.0, or 12.0 mg/kg) or placebo,
with a four-week follow-up period. Group A dosing was completed in August 2019.

Group B is a single-dose arm in which eight participants with chronic HBV who are naïve to nucleoside analog therapy will receive a 3.0 mg/kg
dose of RG6346 or placebo; these participants will be followed for at least 12 weeks. We initiated Group B dosing in the third quarter of 2019, in
parallel with Group C at the 3.0 mg/kg dose level. Group B dosing is expected to be completed in the first quarter of 2020.

Group C is a multiple-ascending-dose arm in which RG6346 (1.5, 3.0, or 6.0 mg/kg) or placebo will be administered to 18 participants with chronic
HBV who are already being treated with nucleoside analogs, with a treatment and follow-up period of 16 weeks or more.

◦

◦

◦

We dosed the first patient, from Group C, at a dose of 1.5 mg/kg, in May 2019. The final patient’s last dose in the 1.5 mg/kg dose cohort
was administered in October 2019.

We dosed the first patient in 3.0 mg/kg cohort in August 2019. The final patient’s last dose in the 3.0 mg/kg dose group was administered in
January 2020.

We dosed the first patient in the 6.0 mg/kg cohort in December 2019 and are enrolling the remainder of the cohort.

In order to be optimally positioned to develop and commercialize our product candidate, RG6346, in combination with other novel drugs, we entered
into a research collaboration and licensing agreement with Roche in October 2019. Under the terms of the agreement, we will be leading the development of
RG6346 through the current Phase 1 trial, and pending favorable results, Roche intends to further develop RG6346 with the overall goal of developing a
combination regime to achieve a long-term immunological cure of chronic HBV in combination with additional Roche product candidates in Phase 2 and
Phase 3 clinical trials.DCR-A1AT for

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Alpha-1 Antitrypsin Deficiency-Associated Liver Disease

Our GalXC RNAi platform-based product candidate for the treatment of alpha-1 antitrypsin (“A1AT”) deficiency-associated liver disease, DCR-A1AT,

is currently being tested in a Phase 1/2 clinical study. A1AT deficiency is an inherited disorder that can lead to liver disease in children and adults and lung
disease in adults. The disorder is caused by mutations in a gene called SERPINA1. This gene, when functioning normally, provides instructions for making the
A1AT protein, which protects the body from an enzyme called neutrophil elastase. This enzyme is released from white blood cells to fight infection, but it can
attack normal tissues if not tightly controlled by A1AT. Mutations in the SERPINA1 gene can result in a deficiency of A1AT or, most commonly, an abnormal
form of the protein that cannot control neutrophil elastase. Accumulation of abnormal A1AT protein in the liver can lead to liver disease. Uncontrolled
neutrophil elastase can also destroy alveoli (small air sacs in the lungs) and cause lung disease.

A1AT deficiency occurs all over the world, though its prevalence varies by population. The disorder affects roughly one in 1,500 to 3,500 individuals

with European ancestry but is uncommon in people of Asian descent. Congenital A1AT deficiency is estimated to affect 2.4 people out of every 10,000 in the
EU.

The initial DCR-A1AT-101 clinical trial is a Phase 1/2 randomized, placebo-controlled study designed to evaluate the safety and tolerability of DCR-

A1AT in healthy volunteers and in patients with A1AT deficiency-associated liver disease. Secondary objectives are to characterize the pharmacokinetic
profile of DCR-A1AT, to evaluate preliminary pharmacodynamics on serum A1AT protein concentrations, and to characterize the effect of DCR-A1AT on
A1AT deficiency-associated liver disease evaluated by liver biopsy. Exploratory objectives include characterization of the effect of DCR-A1AT on A1AT
deficiency-associated liver disease evaluated by biochemical markers as well as the effect on liver stiffness. The DCR-A1AT-101 clinical trial is divided into
two phases or groups:

•

•

Group A is a single-ascending-dose arm in which a single dose of DCR-A1AT (0.1, 1.0, 3.0, 6.0, or 12.0 mg/kg) or placebo will be administered to
up to 36 healthy volunteers, with a minimum 8-week follow-up. The first participant in Group A was dosed in November 2019; we expect dosing of
Group A to be completed in the second half of 2020.

Group B is a multiple-ascending-dose arm in which DCR-A1AT (doses yet to be determined) or placebo will be administered to up to 24 participants
with A1AT with a treatment and follow-up period of 12 weeks or more.

DCR-Undisclosed

We are currently pursuing preclinical development of an undisclosed candidate for the treatment of a common disease involving the liver. We expect to

begin a Phase 1 study for this program in 2021.

Critical Accounting Policies and Significant Judgments and Estimates

Our discussion and analysis of our financial condition and results of operations is based on our consolidated financial statements, which have been
prepared in accordance with accounting principles generally accepted in the U.S. The preparation of our consolidated financial statements requires us to make
estimates and apply judgments that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the
consolidated financial statements, as well as the revenue and expenses incurred during the reported periods. We base our estimates on historical experience
and on various other factors that we believe are reasonable under the circumstances. Actual results may differ from these estimates and could have a material
impact on our consolidated financial statements.

While our significant accounting policies are more fully described in the notes to our consolidated financial statements included elsewhere in this
Annual Report on Form 10-K, we believe the following accounting policies are the most critical to understanding the judgments and estimates applied in our
reported financial results.

Revenue recognition

We generate revenue from research collaboration and license agreements with third-party customers. Goods and services in the agreements typically

include (i) the grant of licenses for the use of our technology and (ii) the provision of services associated with the research and development of customer
product candidates. Such agreements may provide for consideration to us in the form of upfront payments, research and development services, option
payments, milestone payments, and royalty payments on licensed products.

We account for a contract when we have approval and commitment from both parties, when the rights of the parties are identified, when payment terms

are identified, when the contract has commercial substance, and when collectability of consideration is probable.

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In determining the appropriate amount of revenue to be recognized as we fulfill our obligations under each of our agreements, management completes

the following steps: (i) identifies the contract(s) with a customer; (ii) identifies the performance obligations in the contract; (iii) measures the transaction
price, including whether there are any constraints on variable consideration; (iv) allocates the transaction price to the performance obligations; and
(v) recognizes revenue when (or as) we satisfy each performance obligation.

In order to account for our contracts with customers, we identify the promised goods or services in the contract and evaluate whether such promised
goods or services represent performance obligations. We account for those components as separate performance obligations when the following criteria are
met:

•

•

the customer can benefit from the good or service either on its own or together with other resources that are readily available to the customer, and

our promise to transfer the good or service to the customer is separately identifiable from other promises in the contract.

This evaluation requires subjective determinations and requires us to make judgments about the promised goods and services and whether such goods

and services are separable from the other aspects of the contractual relationship. In determining the performance obligations, we evaluate certain criteria,
including whether the promised good or service is capable of being distinct and whether such good or service is distinct within the context of the contract,
based on consideration of the relevant facts and circumstances for each arrangement. Factors considered in this determination include the research,
manufacturing, and commercialization capabilities of the partner; the availability of research and manufacturing expertise in the general marketplace; and the
level of integration, interrelation, and interdependence among the promises to transfer goods or services.

At contract inception, we determine the standalone selling price for each performance obligation identified in the contract. If an observable price of the

promised good or service sold separately is not readily available, we utilize assumptions that require judgment to determine the standalone selling price for
each performance obligation identified in the underlying contract, which may include development timelines, probabilities of technical and regulatory
success, reimbursement rates for personnel costs, forecasted revenues, potential limitations to the selling price of the product, expected technological life of
the product, and discount rates. The transaction price is allocated among the performance obligations using the relative selling price method, and the
applicable revenue recognition criteria are applied to each of the separate performance obligations.

Licenses of intellectual property: If a license granted to a customer to use our intellectual property is determined to be distinct from the other

performance obligations identified in the arrangement, we recognize revenue from consideration allocated to the license when the license is transferred to the
licensee and the licensee is able to use and benefit from the license. For licenses that are bundled with other promises, we apply judgment to assess the nature
of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time and, if over
time, to conclude upon the appropriate method of measuring progress for purposes of recognizing revenue related to consideration allocated to the
performance obligation. We evaluate the measure of progress each reporting period and, if necessary, adjust the measure of performance and related revenue
recognition.

Milestone payments: At the inception of each contract with a customer that includes development or regulatory milestone payments, we evaluate
whether the milestones are considered probable of being reached and estimate the amount to be included in the transaction price using the most likely amount
method. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the transaction price. Milestone
payments that are not within our control or of the licensee, such as regulatory approvals, are assessed as to the probability of achieving the related milestones.
At the end of each subsequent reporting period, we re‑evaluate the probability of achievement of all milestones and any related constraint, and, if necessary,
adjust the estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis and are recorded as revenue and
through earnings in the period of adjustment.

Options: Customer options, such as options granted to allow a licensee to choose to research and develop additional product candidates or reserve

product candidates against target genes to be identified in the future, or options that allow a customer to designate a target as a lead product, are evaluated at
contract inception in order to determine whether those options provide a material right (i.e., an optional good or service offered for free or at a discount) to the
customer. If the customer option represents a material right, the material right is treated as a separate performance obligation at the outset of the arrangement.
The Company allocates the transaction price to material rights based on the standalone selling price, and revenue is recognized when or as the future goods or
services are transferred or when the option expires. Customer options that are not material rights do not give rise to separate performance obligations, and as
such, the additional consideration that would result from a customer exercising an option in the future is not included in the transaction price for the current
contract. Instead, the option is deemed a marketing offer, and additional option fee payments are recognized or begin being recognized as revenue when the
licensee exercises the options. The exercise of an option that does not represent a material right is treated as a separate contract for accounting purposes.

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Research and development services: Arrangements that include a promise to provide research or development services at the licensee’s discretion are
assessed to determine whether the services provide a material right to the licensee and are capable of being distinct, are not highly interdependent or do not
significantly modify one another, and if so, the services are accounted for as separate performance obligations as the services are provided to the customer.
Otherwise, when research or development services are determined not to be capable of being distinct or distinct within the context of the contract, those
services are combined with the performance obligation that includes the underlying license.

Royalties: For arrangements that include sales-based royalties, including commercial milestone payments based on the achievement of a specified level

of sales, and when the license is deemed to be the predominant item to which the royalties relate, we recognize revenue at the later of (i) when the related
sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). To date,
we have not recognized any royalty revenue resulting from any out-licensing arrangement.

We receive payments from our licensees as established in each contract. Upfront payments and fees are recorded as deferred revenue upon receipt or
when due and may require deferral of revenue recognition to a future period until (or as) we satisfy our performance obligations under these arrangements.
Where applicable, amounts are recorded as contracts receivable when our right to consideration is unconditional. We do not assess whether a contract with a
customer has a significant financing component if the expectation at contract inception is such that the period between payment by the licensees and the
transfer of the promised goods or services to the licensees will be one year or less.

Stock-based compensation

Our stock-based compensation programs grant awards which may include stock options, restricted common stock, rights to acquire stock, and other

stock-based awards. Stock-based compensation cost is measured at the grant date based on the fair value of the award and is recognized as expense over the
requisite service period, which generally represents the vesting period, and includes an estimate of the awards that will be forfeited.

We estimate the fair values of stock options granted to our employees and non-employees on the grant date, rights to acquire stock granted under our

Employee Stock Purchase Plan, and the resulting stock-based compensation expense, using the Black-Scholes option-pricing model. The Black-Scholes
option-pricing model requires the use of judgment to develop input assumptions, some of which are highly subjective, including: (i) the fair value of our
common stock on the date of grant; (ii) the expected volatility of our stock; (iii) the expected term of the award; (iv) the risk-free interest rate; and
(v) expected dividends. In applying these assumptions, we consider the following factors:

Fair Value of Common Stock: We use the market closing price for our common stock on the date of grant to determine the fair value of our common

stock on the date of grant.

Expected Term: The expected term assumption represents the weighted average period the stock options are expected to be outstanding. We use the
simplified method to calculate the expected term for options granted to employees as our stock option grants are considered “plain vanilla” and we do not
have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term due to the limited period of time our common
stock has been publicly traded. The simplified method calculates the expected term as the average time-to-vesting and the contractual life of the options. We
plan to continue to use the simplified method until we have sufficient exercise history as a publicly-traded company.

Expected Volatility: Due to the lack of company-specific historical and implied volatility data, we base our estimate of expected volatility on the

historical volatility of a group of similar companies that are publicly traded. The historical volatility is calculated based on a period of time commensurate
with the expected term assumption. The computation of expected volatility is based on the historical volatility using the daily closing prices of a
representative group of companies with similar characteristics to us, including stage of life cycle, financial leverage, enterprise value, risk profiles, and
position within the industry, along with historical share price information sufficient to meet the expected life of the stock-based awards. We believe the group
selected has sufficient similar economic and industry characteristics and includes companies that are most representative of our company. We intend to
continue to consistently apply this process using the same or similar public companies until a sufficient amount of historical information regarding the
volatility of our own common stock share price becomes available, or unless circumstances change such that the identified companies are no longer similar to
us, in which case, more suitable companies whose share prices are publicly available would be utilized in the calculation.

Risk-Free Interest Rate: The risk-free interest rate is based on the implied yield available on U.S. Treasury zero-coupon issues in effect at the time of

grant for periods corresponding with the expected term of the option.

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Expected Dividend Yield: We have never paid and have no plans to pay dividends on our common stock. Therefore, we use an expected dividend yield

of zero.

Stock-based compensation expense recognized in the financial statements is based on awards that are ultimately expected to vest. Accordingly, we are
also required to estimate forfeitures at the time of grant, and to revise those estimates in subsequent periods if actual forfeitures differ from estimates. We use
historical data to estimate pre-vesting option forfeitures and record stock-based compensation expense only for those awards that are expected to vest. Our
forfeiture rate estimates are based on an analysis of our actual forfeiture experience, employee turnover behavior, and other factors. The impact of any
adjustments to our forfeiture rates would be recorded as a cumulative adjustment in the period of adjustment. To the extent that actual forfeitures differ from
our estimates, the difference is recorded as a cumulative adjustment in the period the estimates were revised.

Recent Accounting Pronouncements

A summary of recent accounting pronouncements that we have adopted or expect to adopt is included in Note 2 – Summary of Significant Accounting
Policies to our consolidated financial statements (see Part I, Item 8 – “Financial Statements and Supplementary Data” of this Annual Report on Form 10-K).
Additional information regarding relevant accounting pronouncements is provided below.

Adopted in 2019

Leases

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), as amended by multiple standards updates, in order to increase
transparency and comparability among organizations by requiring lessees to recognize most leases on their balance sheets and making targeted changes to
lessor accounting. The most significant change arising from the new standard is the recognition of right-of-use (“ROU”) assets and lease liabilities for leases
classified as operating leases. Under the standard, disclosures are required to enable financial statement users to assess the amount, timing, and uncertainty of
cash flows arising from the leases. Companies are also required to recognize and measure leases existing at, or entered into after, the adoption date using a
modified retrospective approach, with certain practical expedients available. Comparative periods prior to adoption have not been retrospectively adjusted.

We adopted the standard on January 1, 2019 and elected the package of three practical expedients that permitted an entity not to (a) reassess whether

expired or existing contracts contain leases, (b) reassess lease classification for existing or expired leases, and (c) consider whether previously capitalized
initial direct costs would be appropriate under the new standard.

Upon adoption, we recorded ROU assets of $2.7 million and lease liabilities of $2.8 million. Initial implementation of the standard did not have a

material impact on the statement of operations or statement of cash flows.

Adopted in 2018

Revenue recognition

In May 2014, the accounting guidance related to revenue recognition was amended to provide a single, comprehensive standard for accounting for

revenue from contracts with customers. The new guidance became effective for us on January 1, 2018 and applies to all contracts with customers. Under the
new guidance, revenue is recognized for contracts with customers based on a model that includes identifying performance obligations and determining and
allocating the transaction price to the performance obligations identified in the contract. Revenue is recognized as those performance obligations are satisfied.
We applied this new guidance retrospectively to all prior periods presented, and adoption of this new guidance did not have a significant quantitative impact
on our consolidated financial statements. However, adoption of this guidance resulted in additional revenue-related disclosures in the notes to our
consolidated financial statements.

Recent Developments

Institutional Investment

On February 6, 2020, we issued and sold an aggregate of approximately $40.0 million of shares of our common stock to a single institutional investor

pursuant to our common stock Sales Agreement with Cowen and Company, LLC as the sales agent. In this transaction, we sold an aggregate of 2,077,500
shares of common stock at a price of $19.25 per share, resulting in net proceeds of approximately $39.2 million after a deduction of approximately $0.8
million in sales commissions. The shares in the offering were sold pursuant to a shelf registration statement declared effective by the Securities and Exchange
Commission (“SEC”) on May 31, 2018 and a prospectus supplement filed with the SEC on June 1, 2018.

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75 Hayden lease

On January 14, 2020, we entered into a non-cancelable real property lease agreement for 61,282 square feet of office and laboratory space in
Lexington, Massachusetts (the “Second Lexington Lease”). The original term is estimated to commence during the fourth quarter of 2020 and is for 125
months with options to extend the term for two additional successive periods of five years thereafter.

The aggregate total fixed rent is approximately $41.8 million with the annual fixed rental payments escalating from $3.6 million to $4.8 million during

the original term. In addition to the fixed rent during the lease term, we will be responsible for certain customary operating expenses and real estate taxes
specified in the agreement. This lease also contains customary default provisions allowing the landlord to terminate the lease or seek damages if we fail to
cure certain breaches of our obligations under the lease within specified periods of time. We are also obligated to indemnify the landlord for certain losses
incurred in connection with our use or occupancy of the premises and to deliver an irrevocable letter of credit or security deposit in the amount of $1.5
million.

Alexion option exercises

In November 2019, the Company and Alexion amended its agreement to clarify funding for certain manufacturing costs for each of the two initial

targets and increased milestone payments for the additional targets if Alexion exercised its options for the two additional targets.

In December 2019, Alexion exercised its options for the exclusive rights to two additional targets within the complement pathway for the discovery
and development of GalXC RNAi molecules. These exercises expand Dicerna and Alexion’s existing research collaboration and license agreement to now
encompass four targets within the complement pathway. In connection with the option exercises, Alexion paid Dicerna a total of $20.0 million, or $10.0
million in option exercise fees per additional target during December 2019.

Novo collaboration

On November 15, 2019, we entered into a Collaboration and License Agreement with Novo (the “Novo Collaboration Agreement”). Refer to “Part II,

Item 8 — Note 8 – Collaborative Research and License Agreements” for further information regarding the Novo collaboration.

Roche collaboration

On October 30, 2019, we entered into a Collaboration and License Agreement with Roche (the “Roche Collaboration Agreement”). Refer to “Part II,

Item 8 — Note 8 – Collaborative Research and License Agreements” for further information regarding the Roche collaboration agreement.

Boulder lease

On August 26, 2019, we entered into a non-cancelable real property lease agreement for 15,781 square feet of office space in Boulder, Colorado (the

“Boulder Lease”). On February 4, 2020, we amended this lease to allow for the rental of an additional 6,985 square feet of office space. We intend to relocate
our currently remote Colorado employees to a portion of this facility upon lease commencement, which we anticipate will occur in the first quarter of 2020,
and plan to occupy the remainder of the space commencing in the second quarter of 2020.

The term of the Boulder Lease is 87 full calendar months plus any partial month from the commencement date to the end of the month in which the

commencement date falls. The Boulder Lease commences on the earlier of the date on which (a) we occupy any portion of the facility and begin conducting
business therein, (b) the landlord delivers the facility to us with the work in the facility substantially completed, or (c) the work in the facility would have
been substantially completed but for the occurrence of any delays caused by us. The Boulder Lease provides for an aggregate fixed rent of approximately $4.4
million during the 87-month term. In addition to the annual fixed rent, we will be responsible for certain customary operating expenses and real estate taxes
specified in the agreement.

Cambridge sublease

On January 4, 2019, we entered into a non-cancelable real property sublease agreement for approximately 9,653 square feet of office space in
Cambridge, Massachusetts (“Cambridge Sublease”). The term of the sublease commenced on January 11, 2019, the date that the landlord provided written
consent to the Cambridge Sublease, and extends through the sublease expiration date of

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July 30, 2021. The Cambridge Sublease provides for an aggregate fixed rent of approximately $0.8 million during the term of the sublease.

Lexington lease

On January 2, 2019, we entered into a non-cancelable real property lease agreement for 80,872 square feet of laboratory and office space in Lexington,

Massachusetts (the “Lexington Lease”). We moved our corporate headquarters and research facility to this location in the fourth quarter of 2019.

The Original Term of the Lexington Lease is seven years, commencing on November 3, 2019. We have options to extend the term of the lease for two

additional successive periods of five years each (the “Extension Periods”).

Annual fixed rent is approximately $3.9 million for the first 12-month period during the Original Term, increasing on an annual basis until reaching

approximately $4.7 million for the seventh 12-month period during the Original Term. The Lexington Lease provides for an aggregate fixed rent of
approximately $30.1 million during the seven-year Original Term. We will agree upon annual fixed rent during the Extension Periods with the landlord
following our provision of notice of intention to exercise an extension option. If we cannot reach an agreement on annual fixed rent during an Extension
Period with the landlord, we will have the right to seek, subject to the terms of the Lexington Lease, a broker determination of the prevailing market rent, and
the annual fixed rent during such Extension Period will be the prevailing market rent determined by the broker.

In addition to the annual fixed rent, we will be responsible for certain customary operating expenses and real estate taxes specified in the agreement.

The Lexington Lease also contains customary default provisions allowing the landlord to terminate the lease or seek damages if we fail to cure certain
breaches of our obligations under the lease within specified periods of time. In addition, we will be obligated to indemnify the landlord for certain losses
incurred in connection with our use or occupancy of the premises.

Financial Operations Overview

Revenue

Our revenue from collaboration arrangements to date has been generated primarily through research funding, license fees, option exercise fees, and

preclinical development payments under our research collaboration arrangements with Lilly, Alexion, and BI. We have not generated any commercial product
revenue, nor do we expect to generate any product revenue in the near-term future.

In the future, we may generate revenue from a combination of research and development payments, license fees and other upfront payments, milestone

payments, product sales, and royalties in connection with our current or future collaborations with partners. We expect that any revenue we generate will
fluctuate in future periods as a result of the timing of our or our collaborators’ achievement of preclinical, clinical, regulatory, and commercialization
milestones, to the extent achieved, the timing and amount of any payments to us relating to such milestones, and the extent to which any of our product
candidates are approved and successfully commercialized by us or a collaborator.

Research and development expenses

Research and development expenses consist of costs associated with our research activities, including discovery and development of our GalXC
molecules and drug delivery technologies, clinical and preclinical development activities, and research activities under our research collaboration and license
agreements. Our research and development expenses include:

•

•

•

•

direct research and development expenses incurred under arrangements with third parties, such as contract research organizations, contract
manufacturing organizations, and consultants;

platform-related lab expenses, including lab supplies, license fees, and consultants;

employee-related expenses, including salaries, benefits, and stock-based compensation expense; and

facilities, depreciation, and other allocated expenses, which include direct and allocated expenses for rent and maintenance of facilities,
depreciation of leasehold improvements and equipment, and laboratory and other supplies.

We expense research and development costs as they are incurred. We account for non-refundable advance payments for goods and services that will be

used in future research and development activities as expenses when the service has been performed or when the goods have been received. A significant
portion of our research and development costs are not tracked by project as they benefit multiple projects or our technology platform.

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General and administrative expenses

General and administrative expenses consist primarily of salaries and related benefits, including stock-based compensation, related to our executive,
finance, legal, business development, commercial, and support functions. Other general and administrative expenses include travel expenses, professional
legal fees (excluding litigation expenses), audit, tax, and other professional services, and allocated facility-related costs not otherwise included in research and
development expenses.

Litigation expense

Litigation expense consists of legal fees and expenses solely related to the litigation with Alnylam Pharmaceuticals, Inc. (“Alnylam”) that was settled

in 2018.

Interest income

Interest income consists of income earned on our cash and cash equivalents, held-to-maturity investments, and restricted cash equivalents.

Interest expense

Interest expense represents interest expense incurred on a long-term payable with Alnylam, which was paid in the first quarter of 2019.

Results of Operations

Comparison of the years ended December 31, 2019 and 2018

The following table summarizes the results of our operations for the periods indicated (amounts in thousands, except percentages):

Revenue

Operating expenses:

Research and development

General and administrative

Litigation expense

Total operating expenses

Loss from operations

Other income (expense):

Interest income

Interest expense

Other income (expense)

Total other income, net

YEAR ENDED
DECEMBER 31,

2019

2018

$ CHANGE

% CHANGE

$

23,904   $

6,176   $

17,728  

287.0 %

109,339  

42,751  

—  

152,090  

(128,186)  

7,537  

(3)  

193  

7,727  

45,711  

21,685  

29,132  

96,528  

(90,352)  

2,102  

(603)  

—  

1,499  

63,628  

21,066  

(29,132)  

55,562  

(37,834)  

5,435  

600  

193  

6,228  

139.2 %

97.1 %

(100.0)%

57.6 %

41.9 %

258.6 %

(99.5)%

— %

415.5 %

35.6 %

Net loss attributable to common stockholders

$

(120,459)   $

(88,853)   $

(31,606)  

Revenue

For the year ended December 31, 2019, revenue reflects $13.1 million, $4.4 million, and $6.3 million from the Lilly, Alexion and BI collaborations,
respectively, compared to $0.1 million and $6.1 million from the Alexion and BI collaborations, respectively, for the year ended December 31, 2018. The
increases in Lilly and Alexion revenue for the year ended December 31, 2019 reflect

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increased activities under each agreement, as both agreements are recognized as revenue on a cost-to-cost measure of progress method. No revenue was
recognized under the Novo and Roche agreements during the year ended December 31, 2019, as work had not yet commenced under either agreement.

Research and development expenses

The following table summarizes our research and development expenses incurred during the periods indicated (amounts in thousands, except

percentages):

Direct research and development expenses

Platform-related expenses

Employee-related expenses

Facilities, depreciation, and other expenses

Total

YEAR ENDED
DECEMBER 31,

2019

2018

$ CHANGE

% CHANGE

$

$

59,433   $

22,912   $

13,222  

31,173  

5,511  

6,325  

13,130  

3,344  

109,339   $

45,711   $

36,521  

6,897  

18,043  

2,167  

63,628  

159.4%

109.0%

137.4%

64.8%

139.2%

Research and development expenses increased for the year ended December 31, 2019 compared to the year ended December 31, 2018 primarily due to
direct research and development expenses and employee-related expenses. The $36.5 million increase in direct research and development expenses included a
$20.1 million increase in manufacturing costs, primarily for drug substance to support our clinical studies, and an $11.9 million increase in clinical study
costs, reflecting increased activities associated with our nedosiran and RG6346 programs. Research and development expenses were also impacted by a $18.0
million increase in employee-related expenses, which include salaries, benefits, and stock-based compensation. The increase in employee-related expenses is
a result of a 124% increase in research and development headcount necessary to support our collaboration agreements and expanding pipeline. Finally,
platform-related expenses increased $6.9 million primarily due to higher raw materials and lab supplies costs of $5.0 million.

We expect our overall research and development expenses to continue to increase for the foreseeable future as we ramp our clinical manufacturing

activities, continue clinical activities associated with three of our core product candidates, initiate activities under the Novo and Roche agreements, and
continue activities under the Lilly, Alexion, and BI agreements.

General and administrative expenses

General and administrative expenses were $42.8 million and $21.7 million for the years ended December 31, 2019 and 2018, respectively. The $21.1
million increase in general and administrative expenses is primarily due to increases of $10.0 million in employee-related compensation, including salaries,
benefits, and stock-based compensation, due to a 220% increase in headcount necessary to support our growing operations. In addition, general and
administrative expenses increased $5.7 million related to professional fees and consulting costs.

We expect general and administrative expenses to continue to increase in 2020, as compared to 2019, largely due to investments in staffing and market

readiness activities.

Litigation expense

Litigation expenses of $29.1 million recorded during the year ended December 31, 2018 are comprised solely of litigation and settlement expenses

associated with the litigation with Alnylam.

Interest income

Interest income is comprised of interest earned from our money market accounts and held-to-maturity investments. Interest income was $7.5 million

and $2.1 million for the years ended December 31, 2019 and 2018, respectively. The increase was primarily due to higher held-to-maturity investments
balances amounts during the year ended December 31, 2019 primarily resulting from our follow-on public offering in September 2018 and funds received
from the collaboration agreements with Lilly and Alexion in the fourth quarter of 2018.

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Interest expense

Interest expense of $0.6 million during the year ended December 31, 2018 represents interest expense incurred on our litigation settlement payable.

Comparison of the years ended December 31, 2018 and 2017

The following table summarizes the results of our operations for the periods indicated (amounts in thousands, except percentages):

Revenue

Operating expenses:

Research and development

General and administrative

Litigation expense

Total operating expenses

Loss from operations

Other income (expense):

Interest income

Interest expense

Total other income, net

Net loss

Dividends on redeemable convertible preferred stock

Deemed dividend related to beneficial conversion feature of redeemable

convertible preferred stock

Deemed dividend on conversion of redeemable convertible preferred stock

YEAR ENDED
DECEMBER 31,

2018

2017

$ CHANGE

% CHANGE

$

6,176   $

1,030   $

5,146  

499.6 %

45,711  

21,685  

29,132  

96,528  

35,888  

16,838  

9,043  

61,769  

9,823  

4,847  

20,089  

34,759  

(90,352)  

(60,739)  

(29,613)  

2,102  

(603)  

1,499  

(88,853)  

—  

—  

—  

539  

—  

539  

(60,200)  

(10,111)  

(6,144)  

(3,837)  

1,563  

(603)  

960  

(28,653)  

10,111  

6,144  

3,837  

(8,561)  

27.4 %

28.8 %

222.1 %

56.3 %

48.8 %

290.0 %

— %

178.1 %

47.6 %

(100.0)%

(100.0)%

(100.0)%

10.7 %

Net loss attributable to common stockholders

$

(88,853)   $

(80,292)   $

Revenue

During the year ended December 31, 2018, revenue increased $5.1 million compared to 2017 due to the recognition of a full year of revenue under

the BI Agreement and our entry into the Alexion Collaboration Agreement.

Revenue recognized under the BI Agreement during the years ended December 31, 2018 and 2017 was $6.1 million and $1.0 million, respectively.

This revenue represents the periodic amortization of a non-refundable upfront payment of $10.0 million and $0.3 million of certain reimbursable costs
pursuant to the BI Agreement, which was signed in the fourth quarter of 2017.

Revenue recognized under the Alexion Collaboration Agreement during the year ended December 31, 2018 was $0.1 million. At December 31,
2018, the $31.3 million of consideration received and allocated to the revenue element of the arrangement relates to our partially unsatisfied performance
obligations and is recorded as a contract liability presented in deferred revenue, of which $11.7 million was included in the current portion of deferred
revenue. As of December 31, 2018, we expected to recognize this amount over the remaining research program term, which we estimated would extend
through the fourth quarter of 2023.

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Research and development expenses

The following table summarizes our research and development expenses incurred for the periods indicated (amounts in thousands, except percentages):

Direct research and development expenses

Platform-related expenses

Employee-related expenses

Facilities, depreciation, and other expenses

Total

YEAR ENDED
DECEMBER 31,

2018

2017

$ CHANGE

  % CHANGE

$

22,912   $

15,898   $

6,325  

13,130  

3,344  

6,611  

10,155  

3,224  

$

45,711   $

35,888   $

7,014  

(286)  

2,975  

120  

9,823  

44.1 %

(4.3)%

29.3 %

3.7 %

27.4 %

Research and development expenses increased for the year ended December 31, 2018 compared to the year ended December 31, 2017 primarily due

to direct research and development expenses. The $7.0 million increase in direct research and development expenses is primarily due to increases in clinical
development spending of $5.2 million for nedosiran and $1.1 million for RG6346. In addition, employee-related expenses increased $3.0 million during the
year ended December 31, 2018 as a result of increased headcount necessary to support our growth.

Research and development expenses for the years ended December 31, 2018 and 2017 were additionally offset by $0.7 million and $1.1 million of

grant income, respectively.

General and administrative expenses

General and administrative expenses were $21.7 million and $16.8 million for the years ended December 31, 2018 and 2017, respectively. The

increase of $4.8 million is primarily due to increases of $1.9 million in consulting costs, $1.0 million in compensation for our board of directors, and $0.8
million in salary and benefits expense. Our use of consultants increased largely due to business development consulting services and accounting support for
the implementation of new accounting standards and preparation for our planned compliance with Sarbanes-Oxley Section 404(b) in 2019, as well as to
support new product initiatives. The increase in board of directors’ compensation is largely related to stock-based compensation. Salaries and benefits
expenses increased as a result of increased headcount required to support our growth.

Litigation expenses

Litigation expenses are comprised solely of litigation and settlement expenses associated with the litigation with Alnylam. Litigation expenses
increased predominantly due to $24.7 million of settlement expenses recorded related to the Settlement Agreement during the year ended December 31, 2018.

Interest income

Interest income is comprised primarily of interest earned from our money market accounts and held-to-maturity investments. Interest income was $2.1

million and $0.5 million for the years ended December 31, 2018 and 2017, respectively. The increase was primarily due to higher held-to-maturity
investments balances amounts during the year ended December 31, 2018 primarily resulting from our follow-on public offering in September 2018 and funds
received from the collaboration agreements with Lilly and Alexion in the fourth quarter of 2018.

Interest expense

Interest expense of $0.6 million during the year ended December 31, 2018 represents interest expense incurred on our litigation settlement payable.

Dividends

There were no dividends recorded related to redeemable convertible preferred stock for the year ended December 31, 2018, as all shares of the

redeemable convertible preferred stock were converted into shares of our common stock on December 18, 2017.

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Net loss attributable to common stockholders

Net loss attributable to common stockholders was $88.9 million and $80.3 million for the years ended December 31, 2018 and 2017, respectively. The

overall increase in net loss attributable to common stockholders was due to the increase in net loss from the prior year of $28.7 million, which was partially
offset by $10.1 million of dividends and deemed dividends on redeemable convertible preferred shares, as well as $10.0 million of deemed dividends related
to the beneficial conversion feature (“BCF”) and conversion of redeemable convertible preferred shares in 2017.

Liquidity and Capital Resources

Overview

We have historically funded our operations primarily through the public offering and private placement of our securities and consideration received

from our collaborative arrangements with Lilly, Alexion, and BI. As of December 31, 2019, we had cash, cash equivalents, and held-to-maturity investments
of $348.9 million compared to $302.6 million as of December 31, 2018.

On May 31, 2018, a universal shelf registration statement on Form S-3 permitting the sale of up to $250.0 million of our common stock and other
securities was declared effective by the SEC. In September 2018, we sold an aggregate of 8,832,565 shares of our common stock for gross proceeds of $115.0
million pursuant to this registration statement. We intend to use the net proceeds from the offering for preclinical studies and clinical trials, and to use the
remainder of any net proceeds for continued technology platform development, working capital, and general corporate purposes.

On November 7, 2019, we filed a universal shelf registration statement as a well-known seasoned issuer on Form S-3 permitting the sale of common
stock, preferred stock, debt securities, warrants, other rights, or units. We may offer and sell these securities in one or more issuances at prices and on terms
that will be determined at the time of offering.

In January 2020, we received a $200.0 million upfront payment from Roche associated with the Roche Collaboration Agreement executed in October

2019 and a $175.0 million upfront payment from Novo associated with the Novo Collaboration Agreement executed in November 2019.

On February 6, 2020, we issued and sold an aggregate of approximately $40.0 million of shares of our common stock to a single institutional investor

pursuant to our common stock Sales Agreement with Cowen and Company, LLC as the sales agent. In this transaction, we sold an aggregate of 2,077,500
shares of common stock at a price of $19.25 per share, resulting in net proceeds of approximately $39.2 million after a deduction of approximately $0.8
million in sales commissions. The shares in the offering were sold pursuant to a shelf registration statement declared effective by the SEC on May 31, 2018
and a prospectus supplement filed with the SEC on June 1, 2018.

We believe that our cash, cash equivalents, and held-to-maturity investments, together with the $375.0 million in upfront payments from our recently

announced collaboration agreements with Novo and Roche, provides us with sufficient resources to continue our planned operations and clinical activities
into 2023.

Cash flows

The following table shows a summary of our consolidated cash flows for the periods indicated (amounts in thousands):

Net cash (used in) provided by operating activities

Net cash provided by (used in) investing activities

Net cash provided by financing activities

Operating activities

YEAR ENDED
DECEMBER 31,

2019

2018

2017

$

$

$

(692)   $

49,531   $

52,888   $

18,298   $

(202,731)   $

169,883   $

(45,327)

(19,852)

112,731

Net cash used in operating activities was $0.7 million compared to net cash provided by operating activities of $18.3 million for the years ended
December 31, 2019 and 2018, respectively. The $19.0 million decrease in net cash provided by operating activities for the year ended December 31, 2019 was
primarily due to an increased operating loss of $31.6 million. The decrease in cash was also impacted by a $21.0 million decrease in the litigation settlement
payable as a result of the change in year over year activity. These decreases were offset by an increase in deferred revenue of $37.9 million associated with
our collaboration agreements.

Net cash provided by operating activities was $18.3 million and net cash used in operating activities was $45.3 million for the years ended December
31, 2018 and 2017, respectively. The $63.6 million net increase in cash provided by operating activities was primarily due to an increase of $164.6 million in
deferred revenue due to consideration received in connection with the Lilly and Alexion collaboration agreements. This amount was partially offset by a
$100.0 million increase in contract receivables associated with the upfront payment for the Lilly collaboration agreement.

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Investing activities

Net cash provided by investing activities for the year ended December 31, 2019 was $49.5 million, compared to net cash used in investing activities of
$202.7 million for the year ended December 31, 2018. The decrease of $252.3 million in net cash used in investing activities during 2019 primarily relates to
a $337.0 million increase in proceeds from the maturities of held-to-maturity investments that were partially offset by a $78.7 million increase in purchases of
held-to-maturity investments.

Net cash used in investing activities for the year ended December 31, 2018 was $202.7 million, compared to net cash used in investing activities of
$19.9 million for the year ended December 31, 2017. The increase of $182.9 million in net cash used in investing activities during 2018 primarily relates to an
increase of $193.7 million in purchases of held-to-maturity investments as a result of cash received from our follow-on public offering in September 2018, as
well as the collaboration agreements signed with Lilly and Alexion in October 2018. This increase was partially offset by an $11.0 million increase in the
maturities of held-to-maturity securities.

Financing activities

Net cash provided by financing activities was $52.9 million and $169.9 million for the years ended December 31, 2019 and 2018, respectively. The

decrease in cash provided by financing activities of $117.0 million was primarily due to the receipt of $108.1 million in net proceeds in September 2018 from
a follow-on public offering of our common stock.

Net cash provided by financing activities was $169.9 million and $112.7 million for the years ended December 31, 2018 and 2017, respectively. The
increase in cash provided by financing activities of $57.2 million was primarily due to receipt of $124.6 million in proceeds from the issuance of common
stock net of underwriters’ commissions associated with our follow-on public offering in September 2018 and from the share issuance agreements with Lilly
and Alexion during the fourth quarter of 2018. This amount was partially offset by $69.3 million in proceeds from the redeemable convertible preferred stock
financing in 2017.

Funding requirements

We expect that our primary uses of capital will continue to be commercialization readiness and launch, if approved, third-party clinical research and

development services and manufacturing costs, compensation and related expenses, laboratory and related supplies, legal and other regulatory expenses, and
general overhead costs. Because of the numerous risks and uncertainties associated with the development and commercialization of our product candidates
and the extent to which we may enter into additional collaborations with third parties to participate in their development and commercialization, we are
unable to estimate the amounts of capital outlays and operating expenditures associated with our anticipated development activities. However, based on our
current operating plan, we believe that our available cash, cash equivalents, and held-to-maturity investments will be sufficient to fund the execution of our
current clinical and operating plans into 2023. We based this estimate on assumptions that may prove to be incorrect, and we could utilize our available
capital resources sooner than we currently expect.

Our forecast of the period of time through which our financial resources will be adequate to support our operations is a forward-looking statement that

involves risks and uncertainties, and actual results could vary materially as a result of a number of factors. Our future capital requirements are difficult to
forecast and will depend on many factors, including:

•

•

•

•

•

•

•

•

•

•

•

the potential receipt of any milestone payments under the Novo Collaboration Agreement, Roche Collaboration Agreement, Lilly Collaboration
Agreement, Alexion Collaboration Agreement and BI Agreements;

the terms and timing of any other collaboration, licensing, and other arrangements that we may establish;

the initiation, progress, timing, and completion of preclinical studies and clinical trials for our potential product candidates;

our alignment with the U.S. Food and Drug Administration on regulatory approval requirements;

the number and characteristics of product candidates that we pursue;

the outcome, timing, and cost of regulatory approvals;

delays that may be caused by changing regulatory requirements;

the cost and timing of hiring new employees to support our continued growth;

the costs involved in filing and prosecuting patent applications and enforcing and defending patent claims;

the costs of filing and prosecuting intellectual property rights and enforcing and defending any intellectual property-related claims;

the costs of responding to and defending ourselves against complaints and potential litigation;

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•

•

•

the costs and timing of procuring clinical and commercial supplies for our product candidates;

the extent to which we acquire or in-license other product candidates and technologies; and

the extent to which we acquire or invest in other businesses, product candidates, or technologies.

Until such time, if ever, that we generate product revenue, we expect to finance our future cash needs through a combination of public or private equity

offerings, debt financings, and research collaboration and license agreements.

Please see the risk factors set forth in Part I, Item 1A – “Risk Factors” in this Annual Report on Form 10-K for additional risks associated with our

substantial capital requirements.

Contractual Obligations and Commitments

The following is a summary of our contractual obligations as of December 31, 2019 (amounts in thousands):

Operating lease obligations

Finance lease obligations
____________________________ 

Payments Due By Period*

More Than
1 Year and
Less Than
3 Years

More Than
3 Years and
Less Than
5 Years

Less Than
1 Year

More Than
5 Years

5,968   $

52   $

8,416   $

96   $

8,723   $

92   $

8,853

—

Total

$

$

31,960   $

240   $

*

Represents future minimum lease payments under our existing non-cancelable operating leases for our offices and laboratory space and our finance lease for equipment.
Excluded from the table above are fixed lease payments of $4.4 million associated with our lease of office and laboratory space in Boulder, Colorado and $41.8 million
associated with our newest lease in Lexington, Massachusetts. Such lease payments were excluded, as the commencement dates have not yet occurred for accounting
purposes and lease liabilities have not yet been recognized on our consolidated balance sheet.

We also have obligations to make future payments to licensors that become due and payable on the achievement of certain development, regulatory,

and commercial milestones. We have not included any such potential obligations on our consolidated balance sheet or in the table above, since the
achievement and timing of these milestones were not probable or estimable as of December 31, 2019.

Off-Balance Sheet Arrangements

As of December 31, 2019, we did not have any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as
“special purpose” entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or
limited purposes.

ITEM 7A.

QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The primary objectives of our investment activities are to ensure liquidity and to preserve principal, while at the same time maximizing the income we
receive from our marketable securities without significantly increasing risk. Some of the securities that we invest in may have market risk related to changes
in interest rates. As of December 31, 2019, we had cash, cash equivalents, and held-to-maturity investments of $348.9 million. Our primary exposure to
market risk is interest rate sensitivity, which is affected by changes in the general level of U.S. interest rates. Due to the short-term maturities of our cash and
cash equivalents and held-to-maturity investments and the low risk profile of our investments, an immediate 100 basis point change in interest rates by the
U.S. federal reserve would not have a material effect on the fair market value of our cash, cash equivalents, or held-to-maturity investments. To minimize the
risk in the future, we intend to maintain our portfolio of cash, cash equivalents, and held-to-maturity investments in a variety of securities, including
commercial paper, money market funds, and government securities.

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ITEM 8.

FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

DICERNA PHARMACEUTICALS, INC.
INDEX TO FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm

Consolidated Balance Sheets as of December 31, 2019 and 2018

Consolidated Statements of Operations for the years ended December 31, 2019, 2018, and 2017

Consolidated Statements of Changes in Redeemable Convertible Preferred Stock and Stockholders’ Equity for the years ended December 31,

2019, 2018, and 2017

Consolidated Statements of Cash Flows for the years ended December 31, 2019, 2018, and 2017

Notes to Consolidated Financial Statements

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85

86

87

89

91

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Stockholders of Dicerna Pharmaceuticals, Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Dicerna Pharmaceuticals, Inc. and subsidiaries (the “Company”) as of December 31, 2019
and 2018, the related consolidated statements of operations, changes in redeemable convertible preferred stock and stockholders’ equity, and cash flows, for
each of the three years in the period ended December 31, 2019, and the related notes (collectively referred to as the “financial statements”). In our opinion,
the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2019 and 2018, and the results of its
operations and its cash flows for each of the three years in the period ended December 31, 2019, in conformity with accounting principles generally accepted
in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's
internal control over financial reporting as of December 31, 2019, based on criteria established in Internal Control - Integrated Framework (2013) issued by
the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 27, 2020, expressed an unqualified opinion on the
Company's internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial
statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company
in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures
to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks.
Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included
evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial
statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matters

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required
to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our
especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial
statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on
the accounts or disclosures to which it relates.

Revenue from Collaborative Arrangements - Refer to Notes 2 and 8 to the financial statements.

Critical Audit Matter Description
The Company recognizes revenue upon transfer of control of promised goods or services to customers in an amount that reflects the consideration the
Company expects to receive in exchange for those goods or services. The Company’s collaboration and license agreements contain certain promises that
together represent single performance obligations because the promises to transfer individual
services are not distinct from other promises in the contracts.

Significant judgment is exercised by the Company in determining revenue recognition for these customer arrangements, and includes
the following:

•

•

Determination of whether goods and services are considered distinct performance obligations that should be accounted for separately versus
combined, such as licenses of intellectual property and related services that are sold in license and development arrangements.

Determination of stand-alone selling prices for each distinct performance obligation and for goods and services that are not sold separately.

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•

Estimating the total cost of fulfilling certain performance obligations that are satisfied over time, which impacts the timing of revenue recognition for
such performance obligations.

Given these factors, the related audit effort in evaluating management’s judgments in determining revenue recognition for these customer agreements was
extensive and required a high degree of auditor judgment.

How the Critical Audit Matter Was Addressed in the Audit

Our principal audit procedures related to the Company’s revenue recognition for these customer agreements included the following:

• We tested the effectiveness of internal controls related to the identification of distinct performance obligations and the determination of the timing of

revenue recognition.

• We evaluated management’s significant accounting policies related to these customer agreements for reasonableness

•

For arrangements that became effective during the year ended December 31, 2019, we performed the following procedures:

◦

◦

◦

Obtained and read contract source documents for each selection and other documents that were part of the agreement.

Tested management’s identification of significant terms for completeness, including the identification of distinct performance obligations.

Assessed the terms in the customer agreement and evaluated the appropriateness of management’s application of their accounting policies,
along with their use of estimates, in the determination of revenue recognition conclusions.

◦ We evaluated the reasonableness of management’s estimate of stand-alone selling prices for performance obligations that are not sold

separately.

• We evaluated the estimates of total contract costs to fulfill performance obligations by performing the following procedures:

◦ We compared costs incurred for activities completed to date to the costs forecasted for those activities.

◦ We evaluated management’s ability to achieve the estimates of total contract cost and profit by performing corroborating inquiries with the

Company’s operations teams and comparing the information obtained to estimates included in the accounting records.

◦ We compared management’s estimates for the selected contracts to historical experience and original budgets, when applicable.

• We tested the mathematical accuracy of management’s calculations of revenue and the associated timing of revenue recognized in the financial

statements.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

February 27, 2020

We have served as the Company’s auditor since 2008.

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ASSETS

CURRENT ASSETS:

Cash and cash equivalents

Held-to-maturity investments

Contract receivables

Prepaid expenses and other current assets

Total current assets

NONCURRENT ASSETS:

Property and equipment, net

Right-of-use operating assets, net

Restricted cash equivalents

Other noncurrent assets

Total noncurrent assets

TOTAL ASSETS

LIABILITIES AND STOCKHOLDERS’ EQUITY

CURRENT LIABILITIES:

Accounts payable

Accrued expenses and other current liabilities

Lease liability, current

Litigation settlement payable

Deferred revenue, current

Total current liabilities

NONCURRENT LIABILITIES:

Lease liability, noncurrent

Deferred revenue, noncurrent

Other noncurrent liabilities

Total noncurrent liabilities

TOTAL LIABILITIES

DICERNA PHARMACEUTICALS, INC.
CONSOLIDATED BALANCE SHEETS
(in thousands, except share data and par value)

DECEMBER 31,

2019

2018

$

152,816   $

$

$

196,065  

200,354  

6,934  

556,169  

7,076  

30,102  

3,894  

168  

41,240  

597,409   $

6,077   $

20,042  

3,358  

—  

212,258  

241,735  

20,141  

182,730  

608  

203,479  

445,214  

—  

7  

677,504  

(525,316)  

152,195  

54,239

248,387

100,000

2,888

405,514

2,718

—

744

65

3,527

409,041

5,013

9,649

—

10,500

68,893

94,055

—

114,293

—

114,293

208,348

—

7

605,495

(404,809)

200,693

409,041

COMMITMENTS AND CONTINGENCIES (NOTE 15)

STOCKHOLDERS’ EQUITY:

Preferred stock, $0.0001 par value – 5,000,000 shares authorized; no shares issued or outstanding at
December 31, 2019 or 2018

Common stock, $0.0001 par value – 150,000,000 shares authorized; 71,573,196 and 68,210,742 shares issued
and outstanding at December 31, 2019 and 2018, respectively

Additional paid-in capital

Accumulated deficit

Total stockholders’ equity

TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY

$

597,409   $

The accompanying notes are an integral part of these consolidated financial statements.

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Revenue

Operating expenses:

Research and development

General and administrative

Litigation expense

Total operating expenses

Loss from operations

Other income (expense):

Interest income

Interest expense

Other income (expense)

Total other income, net

Net loss

DICERNA PHARMACEUTICALS, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS
(in thousands, except share and per share data)

YEAR ENDED
DECEMBER 31,

2019

2018

2017

$

23,904   $

6,176   $

1,030

109,339  

42,751  

—  

152,090  

(128,186)  

7,537  

(3)  

193  

7,727  

45,711  

21,685  

29,132  

96,528  

35,888

16,838

9,043

61,769

(90,352)  

(60,739)

2,102  

(603)  

—  

1,499  

(120,459)  

(88,853)  

—  

—  

—  

—  

—  

—  

$

$

(120,459)   $

(88,853)   $

(1.76)   $

(1.60)   $

68,428,046  

55,616,092  

21,917,415

539

—

—

539

(60,200)

(10,111)

(6,144)

(3,837)

(80,292)

(3.66)

Dividends on redeemable convertible preferred stock

Deemed dividend related to beneficial conversion feature of redeemable convertible preferred

stock

Deemed dividend on conversion of redeemable convertible preferred stock

Net loss attributable to common stockholders

Net loss per share attributable to common stockholders – basic and diluted

Weighted average common shares outstanding – basic and diluted

The accompanying notes are an integral part of these consolidated financial statements.

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DICERNA PHARMACEUTICALS, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’
EQUITY
(in thousands, except share data)

BALANCE – January 1, 2017

—  

—   20,753,001  

296,962  

(255,756)  

41,208

REDEEMABLE 
CONVERTIBLE 
PREFERRED STOCK   
SHARES   AMOUNT  

COMMON 
STOCK

SHARES

  AMOUNT  
2  

  ADDITIONAL
PAID-IN 
CAPITAL

ACCUMULATED
DEFICIT

TOTAL 
STOCKHOLDERS’
EQUITY

700,000   69,250  

—  

—  

—  

—  

—

Issuance of redeemable convertible
preferred stock, net of issuance costs of
$750

Issuance of common stock from public
offering, net of underwriters' commissions
and offering costs of $3,221

Beneficial conversion feature, redeemable
convertible preferred stock

Deemed dividend, beneficial conversion
feature, and redeemable convertible
preferred stock

Accretion of share issuance costs on
redeemable convertible preferred stock

Dividends declared, redeemable
convertible preferred stock

Conversion of redeemable convertible
preferred stock

Exercises of common stock options and
sales of common stock under Employee
Stock Purchase Plan

Vesting of restricted common stock

Settlement of restricted stock for tax
withholding

Stock-based compensation expense

Net loss

BALANCE – December 31, 2017

Proceeds from issuance of common stock
from public offering, net of underwriters'
commissions and offering costs of $330

Issuance of common stock to Alnylam
Pharmaceuticals, Inc.

Issuance of common stock to collaboration
partners

Exercise of warrants to purchase common
stock

Exercises of common stock options and
sales of common stock under Employee
Stock Purchase Plan

Vesting of restricted common stock

Settlement of restricted stock for tax
withholding

Stock-based compensation expense

Net loss

BALANCE – December 31, 2018

—  

—   6,571,428  

1  

42,778  

—  

(6,144)  

—  

—  

6,144  

—  

6,144  

—  

—  

(6,144)  

—  

750  

—  

—  

(750)  

55,124  

9,361  

—  

—  

(9,361)  

(755,124)   (79,361)   24,206,663  

2  

79,359  

—  

—  

—  

—  

—  

—  

—  

—  

—  

—  

—  

107,523  

10,000  

(3,774)  

—  

—  

—   51,644,841  

—  

—  

—  

—  

—  

5  

290  

—  

(11)  

7,770  

—  

417,037  

(315,956)  

—  

—   8,832,565  

1  

107,769  

—  

—  

983,208  

—  

10,315  

—  

—   6,250,019  

1  

60,411  

—  

—  

45,710  

—  

49  

—  

—  

—  

—  

—  

—  

—  

—  

—  

—  

—  

448,173  

10,000  

(3,774)  

—  

—  

—   68,210,742  

87

—  

—  

—  

—  

—  

7  

2,061  

—  

(35)  

7,888  

—  

605,495  

(404,809)  

—  

—  

—  

—  

—  

—  

—  

—  

—  

—  

(60,200)  

—  

—  

—  

—  

—  

—  

—  

—  

(88,853)  

42,779

6,144

(6,144)

(750)

(9,361)

79,361

290

—

(11)

7,770

(60,200)

101,086

107,770

10,315

60,412

49

2,061

—

(35)

7,888

(88,853)

200,693

 
 
 
 
 
 
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DICERNA PHARMACEUTICALS, INC.
CONSOLIDATED STATEMENTS OF CHANGES IN REDEEMABLE CONVERTIBLE PREFERRED STOCK AND STOCKHOLDERS’
EQUITY (CONTINUED)
(in thousands, except share data)

REDEEMABLE 
CONVERTIBLE 
PREFERRED STOCK   
SHARES   AMOUNT  

COMMON 
STOCK

SHARES

  AMOUNT  
7  

  ADDITIONAL
PAID-IN 
CAPITAL

ACCUMULATED
DEFICIT

TOTAL 
STOCKHOLDERS’
EQUITY

BALANCE – December 31, 2018

—  

—   68,210,742  

605,495  

(404,809)  

200,693

Exercises of common stock options and
sales of common stock under Employee
Stock Purchase Plan

Stock-based compensation expense
(inclusive of the impact of adoption of ASU
2018-07)

Issuance of common stock to collaboration
partners

Cumulative effect adjustment related to the
adoption of ASC 842

Net loss

BALANCE – December 31, 2019

—  

—   1,082,472  

—  

7,402  

—  

7,402

—  

—  

—  

—  

18,779  

—  

—   2,279,982  

—  

45,828  

43  

—  

—  

—  

—  

—  

—  

—  

—  

—   71,573,196  

—  

—  

7  

—  

—  

677,504  

(91)  

(120,459)  

(525,316)  

18,822

45,828

(91)

(120,459)

152,195

The accompanying notes are an integral part of these consolidated financial statements. 

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DICERNA PHARMACEUTICALS, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)

CASH FLOWS FROM OPERATING ACTIVITIES:

Net loss

Adjustments to reconcile net loss to net cash used in operating activities:

YEAR ENDED
DECEMBER 31,

2019

2018

2017

(120,459)   $

(88,853)   $

(60,200)

Non-cash litigation expense

Stock-based compensation expense

Depreciation and amortization expense

Amortization of premium on investments

Lease expense

Other

Changes in operating assets and liabilities:

Litigation settlement payable

Deferred revenue

Prepaid expenses and other assets

Accounts payable

Contract receivables

Withholding tax receivable

Accrued expenses and other liabilities

Lease liability

Other

Net cash (used in) provided by operating activities

CASH FLOWS FROM INVESTING ACTIVITIES:

Maturities of held-to-maturity investments

Purchases of held-to-maturity investments

Purchases of property and equipment

Net cash provided by (used in) investing activities

CASH FLOWS FROM FINANCING ACTIVITIES:

Proceeds from issuance of common stock, net of underwriters’ commissions

Payments of common stock offering costs

Proceeds from issuance of redeemable convertible preferred stock

Redeemable convertible preferred stock issuance costs

—  

18,822  

1,254  

(3,559)  

2,747  

(191)  

(10,500)  

211,803  

(3,856)  

2,067  

10,315  

7,888  

774  

(1,126)  

—  

12  

10,500  

173,916  

532  

(1,217)  

(100,354)  

(100,000)  

—  

9,487  

(8,966)  

1,013  

(692)  

418,000  

(362,120)  

(6,349)  

49,531  

—  

(50)  

—  

—  

1,583  

3,974  

—  

—  

81,000  

(283,372)  

(359)  

(202,731)  

108,099  

(703)  

—  

—  

2,110  

(35)  

—

7,770

778

(169)

—

51

—

9,270

(1,459)

626

—

(1,583)

(411)

—

—

70,000

(89,719)

(133)

(19,852)

43,225

(23)

70,000

(750)

—

290

(11)

18,298  

(45,327)

Proceeds from issuance of common stock to collaboration partners

45,828  

60,412  

Proceeds from exercises of common stock warrants, stock options, and issuances under

Employee Stock Purchase Plan

Settlement of restricted stock for tax withholding

Net cash provided by financing activities

7,110  

—  

52,888  

169,883  

112,731

NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS, AND RESTRICTED

CASH EQUIVALENTS

101,727  

(14,550)  

47,552

CASH, CASH EQUIVALENTS, AND RESTRICTED CASH EQUIVALENTS – Beginning of

year

54,983  

69,533  

CASH, CASH EQUIVALENTS AND RESTRICTED CASH EQUIVALENTS – End of year

$

156,710   $

54,983   $

21,981

69,533

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DICERNA PHARMACEUTICALS, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)
(in thousands)

SUPPLEMENTAL CASH FLOW INFORMATION:

NONCASH OPERATING ACTIVITIES:

Right-of-use assets acquired through operating leases

NONCASH INVESTING ACTIVITIES:

Property and equipment purchases included in accounts payable and accrued expenses

NONCASH FINANCING ACTIVITIES:

Right-of-use assets acquired through finance leases

Conversion of redeemable convertible preferred stock into common stock

Dividends on redeemable convertible preferred stock

Deemed dividend related to beneficial conversion feature of redeemable convertible preferred

stock

Deemed dividend on conversion of redeemable convertible preferred stock

Common stock offering costs included in accounts payable or accrued expenses

YEAR ENDED
DECEMBER 31,

2019

2018

2017

$

$

$

$

$

$

$

$

25,725   $

—   $

727   $

1,648   $

193   $

—   $

—   $

—   $

—   $

—   $

—   $

—   $

—   $

—   $

—   $

50   $

—

15

—

79,361

10,111

6,144

3,837

423

The following table provides a reconciliation of cash, cash equivalents, and restricted cash equivalents reported within the consolidated balance sheets that
sum to the total of the amounts shown in the consolidated statements of cash flows:

Cash and cash equivalents

Restricted cash equivalents

Total cash, cash equivalents, and restricted cash equivalents shown in the consolidated

statements of cash flows

DECEMBER 31,

2019

2018

2017

152,816   $

54,239   $

3,894  

744  

68,789

744

156,710   $

54,983   $

69,533

$

$

The accompanying notes are an integral part of these consolidated financial statements.

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DICERNA PHARMACEUTICALS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(tabular amounts in thousands, except share and per share data and where otherwise noted)

1.    DESCRIPTION OF BUSINESS

Business

Dicerna™ Pharmaceuticals, Inc. (“Dicerna” or the “Company”), a Delaware corporation founded in 2006 and headquartered in Lexington, Massachusetts, is a
biopharmaceutical company using ribonucleic acid (“RNA”) interference (“RNAi”) to develop medicines that silence genes that cause or contribute to
disease. The Company’s proprietary GalXC™ technology is being applied to develop what we believe will be potent, selective, and safe RNAi therapies to
treat diseases involving the liver, including rare diseases, chronic liver diseases, cardiometabolic diseases, and viral infectious diseases. As we further enhance
our GalXC technology, we aim to extend our focus beyond the liver to include central nervous system diseases and diseases involving other bodily tissues.
Dicerna aims to treat disease by addressing the underlying causes of illness to address a broad range of diseases, focusing on target genes where connections
between gene and disease are well understood and documented. Dicerna intends to discover, develop, and commercialize novel therapeutics either on its own
or in collaboration with pharmaceutical partners. Dicerna has strategic collaborations with Novo Nordisk A/S (“Novo”), F. Hoffmann-La Roche Ltd and
Hoffmann-La Roche Inc. (together, “Roche”), Eli Lilly and Company (“Lilly”), Alexion Pharmaceuticals, Inc. (together with its affiliates, “Alexion”), and
Boehringer Ingelheim International GmbH (“BI”).

Liquidity

The Company had cash, cash equivalents, and held-to-maturity investments of $348.9 million as of December 31, 2019. The Company believes that its
current cash, cash equivalents, and held-to-maturity investments as of December 31, 2019 will be sufficient to fund the execution of its current clinical and
operating plan into 2023. This estimate assumes no new funding from additional collaboration agreements or from external financing events and no
significant unanticipated changes in costs and expenses.

2.    SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of presentation

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of
America (“GAAP”) and include the accounts of Dicerna Pharmaceuticals, Inc. and its wholly owned subsidiaries. The Company believes that the financial
statements as presented reflect all normal recurring adjustments necessary for a fair statement of the information for the periods presented. All intercompany
balances and transactions have been eliminated in consolidation.

Significant judgments and estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the
reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the Company’s consolidated financial statements,
as well as the revenues and expenses incurred during the reporting periods. On an ongoing basis, the Company evaluates judgments and estimates, including
those related to revenue recognition, stock-based compensation, and accrued expenses. The Company bases its estimates on historical experience and on
various other factors that the Company believes are reasonable under the circumstances, the results of which form the basis for making judgments about the
carrying values of assets and liabilities that are not apparent from other sources. Changes in estimates are reflected in reported results for the period in which
they become known. Actual results could differ materially from those estimates.

Cash and cash equivalents

Cash and cash equivalents includes all highly liquid investments, including money market funds, maturing within 90 days from the date of purchase.

Restricted cash equivalents

Restricted cash equivalents are money market funds held in collateral accounts that are restricted to secure letters of credit for corporate lease activity. The
letters of credit are required to be maintained throughout the terms of the leases.

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Held-to-maturity investments

The Company invests its excess cash balances in short-term and long-term fixed-income investments. The Company determines the appropriate classification
of investments at the time of purchase and re-evaluates such designation as of each balance sheet date. Debt securities carried at amortized cost are classified
as held-to-maturity when the Company has the positive intent and ability to hold the securities to maturity.

The Company’s investment policy mandates that, at the time of purchase, the maturity of each investment within its portfolio shall not exceed two years. In
addition, the weighted‑average maturity of the investment portfolio must not exceed one year.

Concentrations of credit risk and significant customers

Financial instruments that subject the Company to significant concentrations of credit risk consist of cash, cash equivalents, restricted cash equivalents, held-
to-maturity investments, contract receivables, and the withholding tax receivable (see Note 8 – Collaborative Research and License Agreements). All of the
Company’s cash, cash equivalents, restricted cash equivalents, and held-to-maturity investments are invested in money market funds or United States
(“U.S.”) treasury securities that management believes to be of high credit quality.

The Company’s revenues for the years ended December 31, 2019 and 2018 are primarily related to the Company’s collaboration agreements which are
concentrated among a few collaboration partners. For the year ended December 31, 2017, all of the Company’s revenue related to one collaboration
agreement. All revenues recognized by the Company to date were earned in the United States. Refer to Note 8 – Collaborative Research and License
Agreements for composition of significant collaboration relationships.

The Company had $200.4 million and $100.0 million of contract receivables at December 31, 2019 and December 31, 2018, respectively. The balance of
contract receivables at December 31, 2019 was primarily related to the non-refundable upfront payment due to the Company in connection with the Roche
collaboration agreement. At December 31, 2018, the balance of the Company’s contract receivables was solely related to the non-refundable upfront payment
due to the Company in connection with the Lilly collaboration agreement (see Note 8 – Collaborative Research and License Agreements).

The Company does not currently own or operate any manufacturing facilities for the production of preclinical, clinical, or commercial quantities of any of its
product candidates. For each product candidate, the Company currently contracts with manufacturers and expects to continue to do so to meet the preclinical
and clinical requirements of its product candidates.

Fair Value Measurements

Fair value is an exit price, representing the amount that would be received from the sale of an asset or paid to transfer a liability in an orderly transaction
between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants
would use in pricing an asset or liability. Valuation techniques used to measure fair value are performed in a manner to maximize the use of observable inputs
and minimize the use of unobservable inputs. As a basis for considering such assumption, the accounting literature establishes a three-tier value hierarchy
which prioritizes the inputs used in measuring fair value as follows:

•

•

•

Level 1 – observable inputs, such as quoted prices in active markets;

Level 2 – inputs other than the quoted prices in active markets that are observable either directly or indirectly; and

Level 3 – unobservable inputs for which there is little or no market data, which requires the Company to develop its own assumptions.

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Property and equipment

Property and equipment are stated at cost. Major betterments are capitalized, whereas expenditures for maintenance and repairs which do not improve or
extend the life of the respective assets are charged to operations as incurred. Depreciation is calculated and applied using the straight-line method over the
estimated useful lives, as shown below:

ASSET CATEGORY

Laboratory equipment

Office and computer equipment

Furniture and fixtures

Leasehold improvements

ESTIMATED
USEFUL LIVES
5 years

3 - 5 years

5 years

5 years or the remaining
term of lease, if shorter

Construction-in-process is stated at cost, which includes the cost of construction and other direct costs attributable to the construction. No provision for
depreciation and amortization expense is recorded related to construction-in-process until the relevant assets are completed and put into use. At December 31,
2019, the balance of construction-in-process includes costs associated with laboratory equipment under installation.

Impairment of long-lived assets

Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be
recoverable. When such events occur, the Company compares the carrying amounts of the assets to their undiscounted expected future cash flows. If this
comparison indicates that there is an impairment, the amount of the impairment is calculated as the difference between the carrying value and fair value of the
related asset. During the years ended December 31, 2019, 2018, and 2017, no impairments were recorded.

Leases

On January 1, 2019, the Company adopted the new lease standard, ASC 842, Leases, discussed below under the heading “Recent accounting
pronouncements,” which is intended to increase transparency and comparability among organizations by requiring lessees to recognize most leases on their
balance sheets and making targeted changes to lessor accounting. The most significant change arising from the new standard is the recognition of right-of-use
(“ROU”) assets and lease liabilities for leases classified as operating leases. Under the standard, disclosures are required to enable financial statement users to
assess the amount, timing, and uncertainty of cash flows arising from the leases.

The Company elected the package of three practical expedients that permitted an entity not to (a) reassess whether expired or existing contracts contain
leases, (b) reassess lease classification for existing or expired leases, and (c) consider whether previously capitalized initial direct costs would be appropriate
under the new standard. In adopting ASC 842, the Company elected not to bifurcate payments between lease and nonlease components associated with leases
for office and laboratory real estate.

The Company determines if an arrangement is a lease at inception. Leases with a term greater than one year are presented on the balance sheet as ROU assets,
lease liabilities and, if applicable, long-term lease liabilities. The Company has elected not to recognize leases with terms of one year or less on its balance
sheet. At the commencement date, operating lease liabilities and their corresponding ROU assets are recorded based on the present value of future lease
payments over the expected lease term. Certain adjustments to the ROU asset may be required for items such as initial direct costs paid or incentives received.
Operating lease cost is recognized over the expected term on a straight-line basis.

The Company determines the expected term for its operating leases considering the noncancelable period of the lease, plus any additional periods covered by
either (a) a Company option to extend (or not to terminate) the lease that the Company is reasonably certain to exercise, or (b) an option to extend (or not to
terminate) the lease controlled by the lessor.

Segment and geographic information

Operating segments are defined as components (business activity from which it earns revenue and incurs expenses) of an enterprise about which discrete
financial information is available and regularly reviewed by the chief operating decision maker in deciding how to allocate resources and in assessing
performance. The Company, through its Chief Executive Officer in his role as chief operating decision maker, views Company operations and manages the
business as one operating segment. All long-lived assets of the Company are located in the United States.

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Research and development costs

Research and development costs consist of expenses incurred in performing research and development activities, including compensation and benefits for
full-time research and development employees, an allocation of facility expenses and overhead expenses, and other external expenses. Research and
development costs are expensed as incurred and were $109.3 million, $45.7 million, and $35.9 million for the years ending December 31, 2019, 2018, and
2017, respectively. Research and development costs that are paid in advance of performance are deferred as a prepaid expense and amortized over the service
period as the services are provided.

Grants and credits

The Company sometimes receives assistance from third-party entities such as governmental or non-profit agencies. When assistance is received from a
governmental entity, the Company first determines whether the payment represents revenue by considering factors such as whether a commercial purpose
exists for the payments and whether the required activity to qualify for the assistance relates to the Company’s ongoing activities. If the Company concludes
that the assistance is revenue, the Company applies Accounting Standards Codification (“ASC”) 606, Revenue from Contracts with Customers. If the
assistance is in the form of an income tax credit, the Company applies the guidance in ASC 740, Income Taxes. When the Company determines that the
assistance is not revenue and does not fall within the scope of ASC 740, it applies International Accounting Standard 20, Accounting for Government Grants
and Disclosure of Government Assistance. Typically, government grants may be considered related to assets or related to income. The Company generally
records grants from governmental and non-profit agencies related to income as a reduction in research and development expense. Grants are recognized when
there is reasonable assurance that the Company will comply with the conditions attached to the grant arrangement and the grant will be received. Grant
payments received related to research and development costs incurred prior to the approval of the qualifying program are recognized immediately upon
approval of the program by the grantor.

Revenue recognition

The Company generates revenue from research collaboration and license agreements with customers. Goods and services in the agreements may include the
grant of licenses for the use of the Company’s technology, the provision of services associated with the research and development of product candidates,
manufacturing services, and participation on joint steering committees. Such agreements may provide for consideration to the Company in the form of upfront
payments; funding or reimbursement of research and development services; reimbursement of certain costs; option exercise payments; payments due upon the
achievement of research, development, regulatory, and commercial-based milestones; and royalty payments on licensed products.

On January 1, 2018, the Company adopted the new revenue recognition standard, discussed below under the heading “Recent accounting pronouncements,”
which amended revenue recognition principles and provides a single, comprehensive set of criteria for revenue recognition. The new revenue standard applies
to all contracts with customers except for contracts that are within the scope of other standards. The new guidance provides a five-step framework through
which revenue is recognized when control of promised goods or services is transferred to a customer at an amount that reflects the consideration to which the
entity expects to be entitled in exchange for those goods or services. To determine revenue recognition for arrangements that the Company concludes are
within the scope of the new revenue recognition standard, management performs the following five steps: (i) identifies the contract(s) with a customer; (ii)
identifies the performance obligations in the contract; (iii) determines the transaction price, including whether there are any constraints on variable
consideration; (iv) allocates the transaction price to the performance obligations; and (v) recognizes revenue when (or as) the Company satisfies a
performance obligation. At contract inception, once a contract is determined to be within the scope of the new revenue standard, Dicerna assesses whether
individual goods or services promised within each contract are distinct and, therefore, represent a separate performance obligation. Goods and services that
are determined not to be distinct are combined with other promised goods or services until a distinct bundle is identified. Dicerna allocates the transaction
price (the amount of consideration to which the Company expects to be entitled in exchange for the promised goods or services) to each performance
obligation and recognizes the associated revenue when (or as) each performance obligation is satisfied. The Company’s estimate of the transaction price for
each contract includes all variable consideration to which Dicerna expects to be entitled at each measuring period.

When two or more contracts are entered into with the same customer at or near the same time, the Company evaluates the contracts to determine whether the
contracts should be accounted for as a single arrangement. Contracts are combined and accounted for as a single arrangement if one or more of the following
criteria are met: (i) the contracts are negotiated as a package with a single commercial objective; (ii) the amount of consideration to be paid in one contract
depends on the price or performance of the other contract; or (iii) the goods or services promised in the contracts (or some goods or services promised in each
of the contracts) are a single performance obligation.

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The evaluation of whether promised goods or services represent distinct performance obligations is subjective and requires the Company to make judgments
about the promised goods and services and whether such goods and services are separable from the other aspects of the contract(s).

The transaction price is allocated among the performance obligations on a relative standalone selling price basis, and the applicable revenue recognition
criteria are applied to each of the separate performance obligations. The Company may estimate the standalone selling price using a residual method when the
selling price is highly variable because a representative standalone selling price is not discernible from past transactions or other observable evidence, or
when the selling price is uncertain.

Determining the standalone selling price for performance obligations requires significant judgment. When an observable price of a promised good or service
is not readily available, the Company considers relevant assumptions to estimate the standalone selling price, including, as applicable, market conditions,
development timelines, probabilities of technical and regulatory success, reimbursement rates for personnel costs, forecasted revenues, potential limitations to
the selling price of the product, and discount rates.

The Company applies judgment in determining whether a combined performance obligation is satisfied at a point in time or over time, and, if over time,
concluding upon the appropriate method of measuring progress to be applied for purposes of recognizing revenue. The Company evaluates the measure of
progress each reporting period and, as estimates related to the measure of progress change, related revenue recognition is adjusted accordingly. Changes in the
Company’s estimated measure of progress are accounted for on a cumulative catch-up basis as a change in accounting estimate and are recorded through
earnings in the period of adjustment.

The Company receives payments from its licensees as established in each contract. Upfront payments and fees are recorded as deferred revenue upon receipt
or when due and most often require deferral of revenue recognition to a future period until the Company performs its obligations under the underlying
arrangements. Where applicable, amounts are recorded as contracts receivable when the Company’s right to consideration is unconditional.

Licenses of intellectual property: If a license granted to a customer to use the Company’s intellectual property is determined to be distinct from the other
performance obligations identified in the arrangement, the Company recognizes revenue from consideration allocated to the license when the license is
transferred to the licensee and the licensee is able to use and benefit from the license. For licenses that are bundled with other promises, the Company applies
judgment to assess the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a
point in time and, if over time, to conclude upon the appropriate method of measuring progress for purposes of recognizing revenue related to consideration
allocated to the performance obligation.

Research and development services: Arrangements that include a promise for the Company to provide research or development services are assessed to
determine whether the services are capable of being distinct, are not highly interdependent or do not significantly modify one another, and if so, the services
are accounted for as a separate performance obligation as the services are provided to the customer. Otherwise, when research or development services are
determined not to be capable of being distinct, such services are added to the performance obligation that includes the underlying license. For research and
development services that are bundled with other promises, the Company applies judgment to assess the nature of the combined performance obligation to
determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, to conclude upon the appropriate method
of measuring progress for purposes of recognizing revenue related to consideration allocated to the performance obligation. The Company evaluates the
measure of progress each reporting period and, if necessary, adjusts the measure of performance and related revenue recognition.

Options: Customer options, such as options granted to allow a licensee to choose to research and develop additional product candidates or reserve product
candidates against target genes to be identified in the future, or options that allow a customer to designate a target as a lead product, are evaluated at contract
inception in order to determine whether those options provide a material right (i.e., an optional good or service offered for free or at a discount) to the
customer. If the customer option represents a material right, the material right is treated as a separate performance obligation at the outset of the arrangement.
The Company allocates the transaction price to material rights based on the standalone selling price, and revenue is recognized when or as the future goods or
services are transferred or when the option expires. Customer options that are not material rights do not give rise to separate performance obligations, and as
such, the additional consideration that would result from a customer exercising an option in the future is not included in the transaction price for the current
contract. Instead, the option is deemed a marketing offer, and additional option fee payments are recognized or begin being recognized as revenue when the
licensee exercises the option. The exercise of an option that does not represent a material right is treated as a separate contract for accounting purposes.

Milestone payments: At the inception of each contract with a customer that includes development or regulatory milestone payments, the Company evaluates
whether the milestones are considered probable of being reached and estimates the amount to be included in the transaction price using the most likely
amount method. If the Company concludes it is probable that a significant revenue reversal

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would not occur, the associated milestone payment is included in the transaction price. Milestone payments that are not within the control of the Company or
the licensee, such as regulatory approvals, are generally not considered probable of being achieved until those approvals are received. The transaction price is
then allocated to each performance obligation on a relative stand-alone selling price basis, for which the Company recognizes revenue as or when the
performance obligations under the contract are satisfied.

At the end of each subsequent reporting period, the Company re-evaluates the probability of achievement of all milestones and any related constraints, and, if
necessary, adjusts the estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis and are recorded as revenue
and through earnings in the period of adjustment.

Royalties: For arrangements that include sales-based royalties, including milestone payments based on the level of sales, and when the license is deemed to be
the predominant item to which the royalties relate, the Company recognizes revenue at the later of (i) when the related sales occur, or (ii) when the
performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied).

Contract costs: The Company recognizes as an asset the incremental costs of obtaining a contract with a customer if the costs are expected to be recovered.
The Company has elected a practical expedient wherein it recognizes the incremental costs of obtaining a contract as an expense when incurred if the
amortization period of the asset that it otherwise would have recognized is one year or less. To date, the Company has not incurred any incremental costs of
obtaining a contract with a customer.

Contract modifications: Contract modifications, defined as changes in the scope or price (or both) of a contract that are approved by the parties to the
contract, such as a contract amendment, exist when the parties to a contract approve a modification that either creates new or changes existing enforceable
rights and obligations of the parties to the contract. Depending on facts and circumstances, the Company accounts for a contract modification as one of the
following: (i) a separate contract; (ii) a termination of the existing contract and a creation of a new contract; or (iii) a combination of the preceding treatments.
A contract modification is accounted for as a separate contract if the scope of the contract increases because of the addition of promised goods or services that
are distinct and the price of the contract increases by an amount of consideration that reflects the Company’s standalone selling prices of the additional
promised goods or services. When a contract modification is not considered a separate contract and the remaining goods or services are distinct from the
goods or services transferred on or before the date of the contract modification, the Company accounts for the contract modification as a termination of the
existing contract and a creation of a new contract. When a contract modification is not considered a separate contract and the remaining goods or services are
not distinct, the Company accounts for the contract modification as an add-on to the existing contract and as an adjustment to revenue on a cumulative catch-
up basis.

The Company receives payments from its licensees as established in each contract. Upfront payments and fees are recorded as deferred revenue upon receipt
or when due and may require deferral of revenue recognition to a future period until the Company performs its obligations under these arrangements. Where
applicable, amounts are recorded as contracts receivable when the Company’s right to consideration is unconditional. The Company does not assess whether a
contract with a customer has a significant financing component if the expectation at contract inception is such that the period between payment by the
licensees and the transfer of the promised goods or services to the licensees will be one year or less.

Stock-based compensation

The Company’s stock-based compensation cost is measured at the grant date of the stock-based award based on the fair value of the award and is recognized
as expense over the requisite service period, which generally represents the vesting period, and includes an estimate of the awards that will be forfeited. The
Company uses the Black-Scholes valuation model for estimating the fair value of stock options. The fair value of stock option awards is affected by the
valuation assumptions, including the expected volatility based on comparable market participants, expected term of the option, risk-free interest rate, and
expected dividends.

Income taxes

The Company records deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the Company’s financial
statement carrying amounts and the tax basis of assets and liabilities using enacted tax rates expected to be in effect in the years in which the differences are
expected to reverse. A valuation allowance is provided to reduce the net deferred tax assets to the amount that will more likely than not (more than 50
percent) be realized.

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The Company also assesses the probability that the positions taken or expected to be taken in its income tax returns will be sustained by taxing authorities. A
“more likely than not” recognition threshold must be met before a tax benefit can be recognized. Tax positions that are more likely than not to be sustained
are reflected in the Company’s consolidated financial statements. Tax positions are measured as the largest amount of tax benefit that is greater than 50
percent likely of being realized upon settlement with a taxing authority that has full knowledge of all relevant information. The difference between the benefit
recognized for a position and the tax benefit claimed on a tax return is referred to as an unrecognized tax benefit. Potential interest and penalties associated
with such uncertain tax positions are recorded as a component of income tax expense.

Net loss per common share attributable to common stockholders

The Company computes basic net loss per common share by dividing net loss attributable to common stockholders by the weighted‑average number of
common shares outstanding. In periods of net income, the Company’s accounting policy includes allocating a proportional share of net income to
participating securities, as determined by dividing total weighted‑average participating securities by the sum of the total weighted‑average common shares
and participating securities (the “two-class method”). The Company’s nonvested restricted shares participated in any dividends declared by the Company and
were therefore considered to be participating securities. Participating securities have the effect of diluting both basic and diluted earnings per share during
periods of income. During periods when the Company incurred a net loss, the Company did not allocate a loss to participating securities because they had no
contractual obligation to share in the losses of the Company. The Company computes diluted net loss per common share after giving consideration to the
dilutive effect of stock options, warrants, nonvested restricted stock, and redeemable convertible preferred shares that are outstanding during the period,
except where such non-participating securities would be anti-dilutive.

The outstanding securities presented below were excluded from the calculation of net loss per share attributable to common stockholders because such
securities would have been anti-dilutive due to the Company’s net loss per share attributable to common stockholders during the periods ending on the dates
presented.

Options to purchase common stock

Warrants to purchase common stock

Nonvested restricted common stock

Total

Recent accounting pronouncements

DECEMBER 31,

2019

12,467,150  

2,198  

—  

2018
7,787,690  

2,198  

—  

2017
6,124,096

87,901

10,000

12,469,348  

7,789,888  

6,221,997

The following table provides a description of the recent accounting pronouncements that had a material effect on the Company’s consolidated financial
statements or disclosures:

Standard

Description

Recently Adopted Accounting Standards

ASU 2014-09, Revenue
from Contracts with
Customers (Topic 606)
and related amendments
(“ASC 606”)

This ASU amends the guidance for accounting for
revenue from contracts with customers, superseding the
revenue recognition requirements in ASC 605, Revenue
Recognition. ASC 606 was effective for annual
reporting periods beginning after December 15, 2017.
Under ASC 606, two adoption methods were allowed:
retrospectively to all prior reporting periods presented,
with certain practical expedients permitted, or
retrospectively with the cumulative effect of initially
adopting ASC 606 recognized at the date of initial
application.

Effective Date
for Company 

Effect on the Consolidated
Financial Statements

January 1, 2018

Effective January 1, 2018, the Company adopted the
requirements of ASC 606 using the full
retrospective method, which required the Company
to recast the prior reporting periods presented. All
financial statements and disclosures have been
recast to comply with ASC 606. See “Change in
accounting principle” below for a summary of the
amounts by which each financial statement line item
was affected by the adoption of ASC 606.

The adoption of ASC 606 has also resulted in
additional revenue-related disclosures in the notes to
the Company’s consolidated financial statements
(see Note 8 – Collaborative Research and License
Agreements).

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Standard

Description

ASU 2016-02, Leases
(Topic 842)

This ASU supersedes existing accounting standards for
lease accounting, including requiring lessees to
recognize most leases on their balance sheets and
making targeted changes to lessor accounting. ASU
2016-02 requires a modified retrospective transition
approach for all leases existing at, or entered into after,
the date of initial application, with an option to use
certain transition relief. In July 2018, the Financial
Accounting Standards Board (“FASB”) issued ASU
2018-11, Leases (Topic 842): Targeted Improvements
(“ASU 2018-11”), which allows entities to initially
apply the new lease guidance at the adoption date and
recognize a cumulative-effect adjustment to the
opening balance of retained earnings in the period of
adoption.

Effective Date for
Company

January 1, 2019

Effect on the Consolidated
Financial Statements

The Company adopted ASU 2016-02 on January 1,
2019 and elected the package of three practical
expedients that permitted an entity to (a) not
reassess whether expired or existing contracts
contain leases, (b) not reassess lease classification
for existing or expired leases, and (c) not consider
whether previously capitalized initial direct costs
would be appropriate under the new standard. In
addition, the Company has elected to combine lease
and non-lease components for certain classes of
assets as a single component and not to recognize
leases on the balance sheet with an initial term of
one year or less. 

Upon adoption, the Company recorded ROU assets
of $2.7 million and lease liabilities of $2.8 million.
Comparative periods prior to adoption have not been
retrospectively adjusted. Initial implementation of
the standard did not have a material impact on the
statement of operations or statement of cash flows.

Change in accounting principle

In May 2014, the FASB issued ASC 606. Under the standard, revenue is recognized when a customer obtains control of promised goods or services in an
amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Effective January 1, 2018, the
Company adopted ASC 606 using the full retrospective method, which required the Company to recast the prior reporting periods presented.

The Company recast its consolidated financial statements from amounts previously reported due to the adoption of ASC 606. Select Consolidated Statement
of Operations line items, which reflect the impact of the adoption of ASC 606, are as follows:

Revenue arrangements

Loss from operations

Net loss

Net loss attributable to common stockholders

YEAR ENDED
DECEMBER 31, 2017

AS REPORTED

ADJUSTMENTS

AS ADJUSTED

$

$

$

$

1,182   $

(60,587)   $

(60,048)   $

(80,140)   $

(152)   $

(152)   $

(152)   $

(152)   $

1,030

(60,739)

(60,200)

(80,292)

The adoption of ASC 606 did not have an impact on net loss per share attributable to common stockholders for any period presented.

Select Consolidated Balance Sheet line items, which reflect the adoption of ASC 606, are as follows:

Prepaid expenses and other current assets

Current portion of deferred revenue

Deferred revenue, net of current portion

Accumulated deficit

DECEMBER 31, 2017

AS REPORTED

ADJUSTMENTS

AS ADJUSTED

$

$

$

$

3,297   $

6,000   $

3,000   $

(315,804)   $

118   $

180   $

90   $

(152)   $

3,415

6,180

3,090

(315,956)

The adoption of ASC 606 did not have an impact on net cash used in operating, investing, or financing activities in the Company’s Consolidated Statements
of Cash Flows.

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3.    HELD-TO-MATURITY INVESTMENTS

The following tables provide information relating to the Company’s held-to-maturity investments:

DESCRIPTION

DECEMBER 31, 2019

GROSS 
UNREALIZED
HOLDING
GAINS

GROSS
UNREALIZED
HOLDING
LOSSES

FAIR
VALUE

AMORTIZED
COST

U.S. Treasury securities maturing in one year or less

  $

196,065   $

160   $

(6)   $

196,219

DESCRIPTION

DECEMBER 31, 2018

GROSS 
UNREALIZED
HOLDING
GAINS

GROSS
UNREALIZED
HOLDING
LOSSES

FAIR
VALUE

AMORTIZED
COST

U.S. Treasury securities maturing in one year or less

  $

248,387   $

—   $

(43)   $

248,344

4.    FAIR VALUE MEASUREMENTS

A summary of the Company’s assets that are measured or disclosed at fair value on a recurring basis is presented below:

DESCRIPTION

TOTAL FAIR
VALUE

LEVEL 1

LEVEL 2

LEVEL 3

DECEMBER 31, 2019

Cash equivalents

Money market funds

Held-to-maturity investments

U.S. Treasury securities

Restricted cash equivalents

Money market funds

Total

  $

152,903   $

152,903   $

—   $

196,219  

—  

196,219  

3,894  

3,894  

—  

  $

353,016   $

156,797   $

196,219   $

DESCRIPTION

TOTAL FAIR
VALUE

LEVEL 1

LEVEL 2

LEVEL 3

DECEMBER 31, 2018

Cash equivalents

Money market funds

Held-to-maturity investments

U.S. Treasury securities

Restricted cash equivalents

Money market funds

Total

  $

44,886   $

44,886   $

—   $

248,344  

—  

248,344  

744  

—  

744  

  $

293,974   $

44,886   $

249,088   $

—

—

—

—

—

—

—

—

The Company’s cash equivalents and restricted cash equivalents, which are in money market funds, are classified within Level 1 of the fair value hierarchy
because they are valued using quoted prices in active markets as of December 31, 2019 and 2018.

The Company’s held-to-maturity investments bore interest at the prevailing market rates for instruments with similar characteristics and therefore
approximated fair value. These financial instruments were classified within Level 2 of the fair value hierarchy, because the inputs to the fair value
measurement are valued using observable inputs as of December 31, 2019 and 2018. The Company’s policy is to recognize transfers between levels of the fair
value hierarchy, if any, at the end of the reporting period; however, there have been no such transfers during any of the periods presented.

As of December 31, 2019 and 2018, the Company’s contract receivables, accounts payable, and accrued expenses approximated their estimated fair values
because of the short-term nature of these financial instruments.

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The litigation settlement payable at December 31, 2018 represents the remaining cash obligation payable to Alnylam (see Note 15) under the terms of the
Settlement & Release Agreement executed between the parties on April 28, 2018 (“Settlement Agreement”). The litigation settlement payable was recorded
as the present value of the future cash payments to be made by the Company under the terms of the Settlement Agreement. As the present value of the
litigation settlement payable was determined using market rates based on the nature of the obligation and the Company’s creditworthiness, the carrying value
approximates the fair value.

5.    PREPAID EXPENSES AND OTHER CURRENT ASSETS

Prepaid expenses and other current assets consist of the following:

Prepaid clinical, contract research, and manufacturing costs

Interest receivable and other current assets

Prepaid insurance

Prepaid rent

Other

Prepaid expenses and other current assets

6.    PROPERTY AND EQUIPMENT, NET

Property and equipment, net, consists of the following:

Laboratory equipment

Office and computer equipment

Furniture and fixtures

Leasehold improvements

Construction-in-process

Property and equipment, at cost

Less: accumulated depreciation and amortization expense

Property and equipment, net

DECEMBER 31,

2019

2018

4,288   $

1,733  

583  

—  

330  

1,419

815

341

245

68

6,934   $

2,888

$

$

DECEMBER 31,

2019

2018

$

9,147   $

2,425  

1,569  

257  

238  

13,636  

(6,560)  

$

7,076   $

4,607

1,021

479

257

1,661

8,025

(5,307)

2,718

Depreciation and amortization expense was $1.3 million, $0.8 million and $0.8 million for the years ended December 31, 2019, 2018, and 2017.

7.    ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES

Accrued expenses and other current liabilities consist of the following:

Accrued clinical, contract research, and manufacturing costs

Accrued compensation and other employee-related benefits

Accrued professional fees

Other accrued expenses and current liabilities

Accrued expenses and other current liabilities

100

DECEMBER 31,

2019

2018

$

$

10,347   $

7,298  

1,519  

878  

20,042   $

3,960

3,684

1,693

312

9,649

 
 
 
 
 
 
 
 
 
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8.    COLLABORATIVE RESEARCH AND LICENSE AGREEMENTS

Novo collaboration and share purchase agreements

Background

On November 15, 2019, Dicerna and Novo entered into a Collaboration and License Agreement (the “Novo Collaboration Agreement”). Under the terms of
the Novo Collaboration Agreement, the Company and Novo will seek to use the Company’s proprietary GalXC™ RNAi platform (“GalXC™”) technology to
progress novel therapies for the treatment of liver-related cardiometabolic diseases towards clinical development and commercialization.

Under the Novo Collaboration Agreement, the Company and Novo plan to explore more than 30 gene targets associated with liver disease with the goal of
delivering multiple clinical candidates for disorders including chronic liver disease, non-alcoholic steatohepatitis (“NASH”), type 2 diabetes, obesity, and rare
diseases. The Company will conduct and fund discovery and preclinical development to clinical candidate selection for each liver cell target. Novo will be
responsible for all further development and commercialization of each candidate selected for development, with the Company manufacturing clinical
candidates selected for Phase 1 related clinical development, subject to reimbursement for its manufacturing costs. In addition, the Company will assist Roche
with the Investigational New Drug (“IND”) filing for the first development candidate. The Company also retains the ability to opt in to co-development of a
total of two programs during clinical development in Phases 1-3, subject to limitations in the event of a change in control. If the Company exercises the co-
development option, it also has an option to co-promote the products in the United States, subject to limitations in the event of a change in control of the
Company. Additionally, the Company may lead the development and commercialization of two programs targeting orphan liver diseases, with Novo retaining
the ability to opt in to both programs in Phases 1-3. The Company and Novo will share profit and loss for the Company’s orphan liver and Novo products
should both parties elect to co-develop.

The Novo Collaboration Agreement provides that the Company will work exclusively with Novo during the research collaboration period on the discovery,
research, development, and commercialization of hepatocyte targets not otherwise subject to the Company’s existing partnerships and that Novo will, during a
specified discovery period, work exclusively with the Company in any new research and development of compounds and products directed to collaboration
targets using small interfering RNA (“siRNA”) conjugated to the sugar N-acetyl-D-galactosamine (“GalNAc”) to reduce the expression of specific target
genes in the liver. Under the Novo Collaboration Agreement, the Company will provide Novo with exclusive and non-exclusive licenses and manufacturing
support to enable Novo to commercialize products derived from or containing compounds developed pursuant to such agreement.

Under the terms of the Novo Collaboration Agreement, Novo paid the Company an upfront payment of $175.0 million, subject to delivery of target
information, in January 2020. The Company is also eligible to receive an additional $75.0 million ($25.0 million at the end of each of the first three years of
the Novo Collaboration Agreement), contingent upon the Company delivering GalXC™ molecules for a defined number of targets, and additional payments
totaling up to approximately $357.5 million per target upon achievement of specified development, regulatory, and commercial milestones. In addition, the
Novo Collaboration Agreement provides that Novo will pay to the Company up to mid-single-digits to mid-teens royalties on product sales on a country by-
country and product-by-product basis until the later of 10 years after the date of first commercial sale of each product in such country, expiration of specified
patent rights in such country, or the expiration of specified regulatory exclusivity in such country for GalXC products, subject to royalty step-down provisions
set forth in the agreement.

In connection with the Novo Collaboration Agreement, the Company and Novo entered into the Novo Share Issuance Agreement on November 15, 2019,
pursuant to which the Company agreed to issue to Novo 2,279,982 shares (the “Novo Shares”) of the Company’s common stock, par value $0.0001 per share
(“Common Stock”), at a purchase price of $21.93 per share, for an aggregate purchase price of approximately $50.0 million.

Accounting Analysis

The Novo Collaboration Agreement and the Novo Share Issuance Agreement (collectively, “the Novo Agreements”) were executed on the same date and
negotiated as a package. Management therefore concluded that the Novo Agreements are to be combined for accounting purposes and concluded that Novo is
a customer in this arrangement pursuant to the guidance under ASC 606.

The Company identified contract promises under the agreement for the license of intellectual property and know-how rights for selected gene targets and
research and development services to develop a clinical candidate for each selected gene target, including manufacturing activities. The Company may also be
required to provide research and development services for an unspecified number of targets, with the goal of the collaboration being to develop clinical
candidates for each of the selected gene targets. The Company determined that the license and research and development services were not capable of being
distinct or distinct within the context of the contract. The research and development services to be provided by Dicerna are specialized in nature, specifically
with respect to the Company’s therapeutic expertise related to RNAi and the Company’s GalXC conjugates. In addition, there is an interdependent

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relationship between the contract promises. As such, the Company concluded that there is a single identified combined performance obligation consisting of a
license and research and development services.

The Company may be required to perform certain additional services after Novo’s nomination of a development candidate. These services include
manufacturing activities through the approval of an IND application for a development candidate, research and development activities to support the filing of
an IND application for the first development candidate, and other development services to support Novo’s development activities related to any development
candidates. The Company will be reimbursed by Novo for these additional services. Because the provision of these additional goods and services are
conditional on Novo electing to nominate a development candidate, the Company has concluded that these goods and services represent customer options and
are not considered performance obligations.

The total transaction price for the Novo Agreements is $254.2 million, consisting of the total $175.0 million upfront compensation, $75.0 million (payable in
three equal annual payments of $25.0 million), and a $4.2 million premium on the sale of shares under the Novo Share Issuance Agreement. The Company
applied equity accounting guidance to measure the $45.8 million recorded in equity upon the issuance of the shares. The upfront payment of $175.0 million
was payable to the Company upon the delivery of a bioinformatics package and mapping plan for at least one of the initial targets selected by Novo, and
therefore, the Company has concluded that such payment represents variable consideration. The Company views the delivery of the bioinformatics package
and mapping plan as akin to achieving a milestone. Because the Company has experience with providing bioinformatics and mapping information, it
concluded that such amount does not need to be constrained and has included the $175.0 million in the transaction price. The $75.0 million in additional
payments is contingent on the Company providing a certain number of mapped targets per year. If the Novo Collaboration Agreement is terminated prior to
the third anniversary of its effective date, the Company is entitled to 80% of the outstanding and unearned annual payments. Pursuant to ASC 606, for the
purpose of determining the transaction price, the Company assumed that the mapped targets will be delivered and that the contract will not be canceled. The
Company also has experience with mapping targets, and therefore, concluded that such amount does not need to be constrained. Accordingly, the Company
will include the $75.0 million of additional payments in the transaction price.

The Company used the most likely amount method to estimate variable consideration and estimated that the most likely amount for each potential preclinical,
development, and regulatory milestone payment under this agreement, which is considered variable consideration, was zero, as the achievement of those
milestones is uncertain and highly susceptible to factors outside of the Company’s control. Accordingly, all such milestones were excluded from the
transaction price. Management will re-evaluate the transaction price at the end of each reporting period, and as uncertain events are resolved or other changes
in circumstances occur, and adjust the transaction price as necessary. Sales-based royalties, including milestone payments based on the level of sales, were
also excluded from the transaction price, as the license is deemed to be the predominant item to which the royalties relate. The Company will recognize such
revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been
satisfied (or partially satisfied).

Revenue associated with the performance obligation will be recognized as services are provided using a cost-to-cost measure of progress method. The transfer
of control occurs over time, as the Company’s performance does not create an asset with alternative use, and the Company has an enforceable right to
payment for performance completed to date. In management’s judgment, this input method is the best measure of progress towards satisfying the performance
obligation and reflects a faithful depiction of the transfer of goods and services.

No revenue was recognized under the Novo Collaboration Agreement during the year ended December 31, 2019. The Company was required to deliver a
bioinformatics package and mapping plan to Novo prior to receiving payment of the $175.0 million upfront payment. The Company commenced and
completed delivery of the bioinformatics package in January 2020. Therefore, no contract asset or contract liability related to the $175.0 million upfront
payment was recorded as of December 31, 2019. The aggregate amount of the equity transaction that was allocated to the revenue element of the arrangement
as of December 31, 2019 relates to the Company’s wholly unsatisfied performance obligation, and is recorded as a contract liability presented in deferred
revenue at December 31, 2019. Of the $4.2 million recorded in deferred revenue, $0.8 million is included in the current portion of deferred revenue. As of
December 31, 2019, the Company expected to recognize revenue over the five-year research term, which may be extended for up to two years.

Roche collaboration agreement

Background

On October 30, 2019, the Company and Roche entered into a Collaboration and License Agreement (the “Roche Collaboration Agreement”). Under the terms
of the Roche Collaboration Agreement, the Company and Roche will seek to progress RG6346 (formerly DCR-HBVS), the Company’s investigational
therapy in Phase 1 clinical development, toward worldwide development and

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commercialization as well as provide an option for the companies to collaborate in the discovery, development, and commercialization of oligonucleotide
therapeutics intended for the treatment of hepatitis B virus (“HBV”).

The Roche Collaboration Agreement requires that Dicerna completes the ongoing Phase 1 clinical trial, along with additional Phase 1 cohorts that were
requested by Roche, who will reimburse the Company for the cost of the additional cohorts, after which Roche will lead the development and
commercialization of the RG6346 program. Roche also has until receipt of interim Phase 1 data from the RG6346 Phase 1 study (but no later than December
31, 2020) to initiate a research and development collaboration with the Company to pursue up to five targets selected by Roche which are intended primarily
to treat HBV. Under the terms of the Roche Collaboration Agreement, the goal of such research and development collaboration will be to select compounds
developed by the Company or Roche for Roche’s continued development and commercialization. The Roche Collaboration Agreement provides that the
Company and Roche’s research and early development organization will work exclusively with each other during the research and development collaboration
period on the discovery, research, and development of such targets selected by Roche, which includes the performance of certain services by Dicerna. Under
the Roche Collaboration Agreement, the Company will provide Roche with exclusive and non-exclusive licenses to support Roche’s activities and to enable
Roche to commercialize products derived from or containing compounds developed pursuant to such agreement.

Under the terms of the Roche Collaboration Agreement, Roche paid the Company a non-refundable upfront payment of $200.0 million in January 2020. The
Company is also eligible to receive additional payments totaling up to approximately $1.47 billion, which includes payments upon achievement of specified
development, regulatory, and commercial milestones. In addition, the Roche Collaboration Agreement provides that Roche will pay to the Company up to
mid-teens percent royalties on product sales. Royalties are payable until the later of 10 years after first commercial sale of each product in a country,
expiration of patent rights in a country, or for products containing RG6346 in a given country, the expiration of data or regulatory exclusivity, subject to
certain royalty step-down provisions set forth in the agreement. In addition, the Company has an option to co-fund the development of products under the
agreement and, if exercised, receive high twenties to mid-thirties royalty rates on the net sales of products in the United States. If the Company exercises the
co-funding option, it shall also have an option to co-promote products containing RG6346 in the United States.

Accounting Analysis

The Company concluded that Roche is a customer in this arrangement pursuant to the guidance under ASC 606. The Company identified contract promises
under the agreement for (i) the license of intellectual property and know-how rights related to the lead compound, (ii) research and development services to
complete the Phase 1 study associated with the lead compound, (iii) lead compound transfer activities, (iv) manufacturing of clinical supply for the lead
compound Phase 1 study, and (v) Roche’s option to receive additional goods and services related to the research and development collaboration. The
Company determined that the Roche Collaboration Agreement contains two performance obligations consisting of: (i) a combined performance obligation
that includes a license, related development and manufacturing services to complete the Phase 1 study, and manufacturing obligations through the completion
of the Phase 1 study related to the lead compound, and (ii) a material right to enter into a research and development collaboration to develop additional
targets. While evaluating contract promises to determine whether each was capable of being distinct and distinct within the context of the contract,
management considered the specialized nature of the services to be provided by Dicerna, specifically with respect to the Company’s therapeutic expertise
related to RNAi and the Company’s GalXC conjugates, and the interdependent relationship between the contract promises. As such, the Company concluded
that the promises of the license and research and development services related to the lead compound were not distinct from each other. Accordingly, these
promises were combined into one performance obligation. Upon Roche’s exercise of its option to enter into the research and development collaboration for
which no additional consideration will be received, Roche has the right to nominate up to five additional targets. To enter the research and development
collaboration, Roche is required to nominate three targets (each, a “Selected Target”) prior to December 31, 2020. For each target, Roche will receive a
license to the Selected Target, for which the Company will perform research services through clinical candidate selection. The Company is not required to
perform services on more than three Selected Targets at any time. Roche also has the right to replace up to three Selected Targets if a clinical candidate cannot
be identified during the research term.

The total transaction price for the Roche Collaboration Agreement is $204.5 million, consisting of the upfront payment of $200.0 million and the estimated
reimbursement from Roche related to the additional cohorts. The Company used the most likely amount method to estimate the amount of reimbursement,
which was considered variable consideration, from Roche related to the additional cohorts. As reimbursement will be made as the Company performs the
related services, the Company concluded that such amount does not need to be constrained, and therefore, included the full amount of the estimated
reimbursement by Roche in the transaction price.

The Company also estimated that the most likely amount for each potential development and regulatory milestone payment under this agreement, which was
considered variable consideration, was zero, as the achievement of those milestones is uncertain and highly susceptible to factors outside of the Company’s
control. Accordingly, all such milestones were excluded from the transaction price.

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Management will re-evaluate the transaction price at the end of each reporting period, and as uncertain events are resolved or other changes in circumstances
occur, and adjust the transaction price as necessary. Sales-based royalties, including milestone payments based on the level of sales, were also excluded from
the transaction price, as the license is deemed to be the predominant item to which the royalties relate. The Company will recognize such revenue at the later
of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or
partially satisfied).

The Company allocated the fixed consideration of $204.5 million included in the transaction price to the performance obligations on a relative standalone
selling price basis. The Company estimated the standalone selling price for the lead compound performance obligation using the adjusted market assessment
approach, whereby the Company adjusted comparable third-party transactions to reflect the stage of development of the Company’s asset. To determine the
estimated standalone selling price of the material right, the Company estimated the standalone selling price of the underlying performance obligations
included in the material right and estimated the probability of Roche exercising such underlying performance obligations. The Company concluded that the
research and development collaboration material right contains (i) five material rights to receive a Selected Target license and related research and
development services, and (ii) three material rights to receive a replacement Selected Target license and related research and development services. The
variable consideration related to the reimbursement from Roche for the additional Phase 1 cohorts and any milestones and royalties that are achieved will be
allocated specifically to the lead compound performance obligation, as this variable consideration relates specifically to the Company’s satisfaction of the lead
compound performance obligation and such allocation has been determined to be consistent with the allocation objective of ASC 606.

Revenue associated with the lead compound performance obligation will be recognized as services are provided using a cost-to-cost measure of progress
method. The transfer of control occurs over time, as the Company’s performance does not create an asset with alternative use, and the Company has an
enforceable right to payment for performance completed to date. In management’s judgment, this input method is the best measure of progress towards
satisfying the performance obligation and reflects a faithful depiction of the transfer of goods and services. The transaction price allocated to the research and
development collaboration material right will be recognized based on the timing of recognition of the underlying performance obligations that comprise the
material right, or upon expiry of the material right if such right is not exercised.

No revenue was recognized under the Roche Collaboration Agreement during the year ended December 31, 2019, as activities under the arrangement had not
yet commenced. The aggregate amount of the consideration received and the amount billed under the arrangement that were allocated to the revenue element
of the arrangement as of December 31, 2019 relates to the Company’s wholly unsatisfied performance obligation. At December 31, 2019, this $200.0 million
amount is recorded as a contract liability presented in deferred revenue, of which $118.1 million is included in the current portion of deferred revenue and is
primarily associated with completion of our Phase 1 study of RG6346. As of December 31, 2019, the Company expected to recognize the balance of deferred
revenue during the estimated three-year research term, which may be extended for up to two years.

Lilly collaboration and share purchase agreements

Background

On October 25, 2018, the Company entered into a Collaboration and License Agreement (the “Lilly Collaboration Agreement”) with Lilly for the discovery,
development, and commercialization of potential new medicines in the areas of cardiometabolic disease, neurodegeneration, and pain. Under the terms of the
Lilly Collaboration Agreement, the Company and Lilly will seek to use the Company’s proprietary GalXC RNAi technology platform (the “GalXC
platform”) to progress new drug targets toward clinical development and commercialization. In addition, the Company and Lilly will collaborate to extend the
GalXC platform technology to non-liver (i.e., non-hepatocyte) tissues, including neural tissues.

The Lilly Collaboration Agreement provides that the Company will work exclusively with Lilly in the neurodegeneration and pain fields, with the exception
of mutually agreed upon orphan indications. Additionally, the Company will work exclusively with Lilly on select targets in the cardiometabolic field. Under
the Lilly Collaboration Agreement, the Company will provide Lilly with exclusive and non-exclusive licenses to support the companies’ activities and to
enable Lilly to commercialize products derived from or containing compounds developed pursuant to such agreement. The Lilly Collaboration Agreement
provides for three initially named hepatocyte targets, and the Company and Lilly have agreed to develop an initial research program with the goal of
researching and developing multiple lead candidates directed to each of these initial targets. The Lilly Collaboration Agreement contemplates in excess of 10
targets.

Under the terms of the Lilly Collaboration Agreement, Lilly agreed to pay the Company a non-refundable upfront payment of $100.0 million. The Company
is also eligible to receive up to $350.0 million per target in development and commercialization milestones, in addition to a $5.0 million payment, which will
become due for each of the non-hepatocyte targets when a product candidate achieves proof of principle in an animal model. In addition, the Company is
eligible to earn mid-single to low-double digit royalties on product sales on a country-by-country and product-by-product basis until the later of expiration of
patent rights in a country, the expiration of

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data or regulatory exclusivity in such country, or 10 years after the first product sale in such country, subject to certain royalty step-down provisions set forth
in the agreement. Simultaneously with the entry into the Lilly Collaboration Agreement, the Company and Lilly entered into a Share Purchase Agreement
(the “Lilly Share Issuance Agreement”), pursuant to which Lilly purchased 5,414,185 shares of the Company’s common stock at $18.47 per share, for an
aggregate purchase price of $100.0 million. Management concluded that the Lilly Share Issuance Agreement is to be combined with the Lilly Collaboration
Agreement (together, the “Combined Agreements”) for accounting purposes. Of the total $200.0 million upfront compensation, the Company applied equity
accounting guidance to measure the $51.3 million recorded in equity upon the issuance of the shares, and $148.7 million was identified as the transaction
price allocated to the revenue arrangement.

Accounting Analysis

The Company concluded that Lilly is a customer in this arrangement, and as such, the element of the arrangement unrelated to the issuance of the shares falls
within the scope of the revenue recognition guidance. The Company identified contract promises under the Combined Agreements for licenses of intellectual
property and know-how rights, associated research and development services for targets and for the extension of the GalXC platform, and participation on a
joint steering committee. The Company determined that the contract promises were not separately identifiable and were not distinct or distinct within the
context of the contract due to the specialized nature of the services to be provided by Dicerna, specifically with respect to the Company’s therapeutic expertise
related to RNAi and the Company’s GalXC conjugates, and the interdependent relationship between the contract promises. As such, the Company concluded
that there was a single identified combined performance obligation.

The Company used the most likely amount method to estimate variable consideration and estimated that the most likely amount for each potential
development milestone payment under this agreement, which is considered variable consideration, was zero, as the achievement of those milestones is
uncertain and highly susceptible to factors outside of the Company’s control. Accordingly, all such milestones were excluded from the transaction price.
Management will re-evaluate the transaction price at the end of each reporting period, and as uncertain events are resolved or other changes in circumstances
occur, and adjust the transaction price as necessary. Sales-based royalties, including milestone payments based on the level of sales, were also excluded from
the transaction price, as the license is deemed to be the predominant item to which the royalties relate. The Company will recognize such revenue at the later
of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or
partially satisfied).

Revenue associated with the performance obligation will be recognized as services are provided using a cost-to-cost measure of progress method. The transfer
of control occurs over time and, in management’s judgment, this input method is the best measure of progress towards satisfying the performance obligation
and reflects a faithful depiction of the transfer of goods and services.

The Company began recognizing revenue under the Lilly Collaboration Agreement during the year ended December 31, 2019, of which $13.1 million had
been recognized to the accompanying consolidated statement of operations. The amount of the Company’s partially unsatisfied performance obligation,
recorded as a contract liability presented in deferred revenue at December 31, 2019 and 2018, is $135.5 million and $148.7 million, respectively, of which
$63.2 million and $54.0 million, respectively, is included in the current portion of deferred revenue. As of December 31, 2019, the Company expected to
recognize this amount over the remaining research term of the agreement, which is expected to extend through the second quarter of 2022.

Alexion collaboration and share purchase agreements

Background

On October 22, 2018, the Company and Alexion entered into a Collaborative Research and License Agreement (the “Alexion Collaboration Agreement”).
The Alexion Collaboration Agreement is for the joint discovery and development of RNAi therapies for complement-mediated diseases. Under the terms of
the Alexion Collaboration Agreement, the Company and Alexion will collaborate on the discovery and development of subcutaneously delivered GalXC
candidates, currently in preclinical development, for the treatment of complement-mediated diseases with potential global commercialization by Alexion. The
Company will lead the joint discovery and research efforts through the preclinical stage, and Alexion will lead development efforts beginning with Phase 1
studies. The Company will be responsible for manufacturing the GalXC candidates through the completion of Phase 1, and certain related costs will be paid
by Alexion. Alexion will be solely responsible for the manufacturing of any product candidate subsequent to the completion of Phase 1. The Alexion
Collaboration Agreement provides Alexion with exclusive worldwide licenses as well as development and commercial rights to the GalXC RNAi molecules
developed in the collaboration in exchange for development- and approval-related milestones, sales milestones, and mid-single to low-double digit royalties
on future product sales.

Under the terms of the Alexion Collaboration Agreement, Alexion agreed to pay the Company a non-refundable upfront payment of $22.0 million. The
Alexion Collaboration Agreement also provides for potential additional payments to the Company of up to $600.0

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million from proceeds from target option exercises and development and sales milestones, as defined in the agreement, which includes: (i) option exercise
fees of up to $20.0 million, representing $10.0 million for each of the targets selected; (ii) development milestones of up to $105.0 million for each product;
and (iii) aggregate sales milestones of up to $160.0 million. Under the agreement, Alexion also agreed to pay to the Company mid-single to low-double digit
royalties on potential product sales on a country-by-country, product-by-product basis until the later of the expiration of patent rights in a country, the
expiration of market or regulatory exclusivity in such country, or 10 years after the first product sale in such country, subject to certain royalty step-down
provisions set forth in the agreement.

Simultaneously with the entry into the Alexion Collaboration Agreement, the Company and Alexion Pharmaceuticals entered into a Share Purchase
Agreement (the “Alexion Share Issuance Agreement”), pursuant to which Alexion Pharmaceuticals purchased 835,834 shares of the Company’s common
stock at $17.95 per share at issuance, for an aggregate purchase price of $15.0 million. Management concluded that the Alexion Share Issuance Agreement is
to be combined with the Alexion Collaboration Agreement (together, the “Alexion Agreements”) for accounting purposes. With respect to the $15.0 million
of cash received upon issuance of the shares, the Company applied equity accounting guidance to measure the $9.1 million recorded in equity upon the
issuance of the shares, and the remaining $5.9 million was included as a component of the transaction price attributable to the revenue arrangement.

Accounting Analysis

The Company concluded that Alexion is a customer in this arrangement, and as such, the element of the arrangement unrelated to the issuance of the shares
falls within the scope of the revenue recognition guidance. The Company identified the following promises under the arrangement: (i) the grant of licenses of
intellectual property and know-how rights; (ii) the option to select additional targets; (iii) the option to perform validation testing on additional targets; (iv)
associated research and development services for the initial and, as applicable, additional targets; and (v) participation in the joint steering committee. The
Company concluded that the research and development services were not capable of being distinct from the research and development licenses, and were not
distinct within the context of the contract, and should therefore be combined into a single performance obligation for each program. The Company considered
the level of Alexion’s therapeutic expertise specifically related to RNAi, as well as Alexion’s know-how of the Company’s GalXC conjugates, and concluded
that Alexion cannot currently benefit from the granted license on its own or together with other resources that are readily available to Alexion, including
relationships with oligonucleotide vendors who synthesize GalXC conjugates under contract with the Company. The Company also concluded that, while
participation on the joint steering committee was capable of being distinct, participation is not distinct from the research and development services within the
context of the contract, as they are both inputs to the combined output of a target that successfully achieves IND approval. This is highlighted as an indicator
in Accounting Standards Codification (“ASC”) 606, Contracts with Customers, that a significant integration service is being provided. As a result, the
combination of the license of intellectual property together with the provision of research and development services and participation on the joint steering
committee together represent the highest level of goods and services that can be deemed distinct.

Additionally, the Company determined that the options to select additional targets and to perform validation testing on additional targets were not priced at a
discount and, as such, do not provide Alexion with material rights. Based on management’s assessments, the Company identified a single performance
obligation, namely, the combined license and research and development services, for each of the two initially nominated targets.

At the outset of the Alexion Collaboration Agreement, the transaction price was determined to be $37.4 million, which is comprised of the $22.0 million
upfront payment, the $5.9 million identified upon issuance of the shares, as described above, and $9.5 million in aggregate contingent milestone payments
that were either received or probable of achievement and under the Company’s control.

The Company used the most likely amount method to estimate variable consideration and estimated that the most likely amount for each potential
development milestone payment beyond the three initial research program milestones under this agreement was zero, as the achievement of those milestones
is uncertain and highly susceptible to factors outside of the Company’s control. Accordingly, such milestones were excluded from the transaction price.
Management will re-evaluate the transaction price at the end of each reporting period, and as uncertain events are resolved or other changes in circumstances
occur, and adjust the transaction price as necessary. Sales-based royalties, including milestone payments based on the level of sales, were also excluded from
the transaction price, as the license is deemed to be the predominant item to which the royalties relate. The Company will recognize such revenue at the later
of (i) when the related sales occur, or (ii) when the performance obligation to which some or all of the royalty has been allocated has been satisfied (or
partially satisfied).

Revenue associated with the performance obligations is being recognized as services are provided using an input method based on a cost-to-cost measure of
progress. The transfer of control occurs over time and, in management’s judgment, this input method is the best measure of progress towards satisfying the
performance obligation and reflects a faithful depiction of the transfer of goods and services.

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In November 2019, the Company and Alexion amended the Alexion Collaboration Agreement (the “Amendment”) to clarify funding of certain
manufacturing costs for each of the two initial targets and increased milestone payments for the additional targets if Alexion exercised its options for the two
additional targets.

In December 2019, Alexion exercised its options for the exclusive rights to two additional targets within the complement pathway for the discovery and
development of GalXC™ RNAi molecules. These exercises expand the companies’ existing research collaboration and license agreement to now encompass
four targets within the complement pathway. In connection with the option exercises, Alexion paid Dicerna a total of $20.0 million, or $10.0 million in option
exercise fees per additional new target that will be recognized into revenue as the related services are performed.

The Company concluded that the Amendment modified the original agreement, as the transaction price was changed as a result of Dicerna assuming
responsibility for certain manufacturing costs associated with the initial targets. The exercise of the options created a single new arrangement for accounting
purposes.

The Company concluded that Alexion is a customer in the Amendment. The Company identified the following promises under the Amendment: (i) the grant
of licenses of intellectual property and know-how rights, and (ii) associated research and development services for the additional targets. The Company
concluded that the research and development services were not capable of being distinct from the research and development licenses, and were not distinct
within the context of the contract, and should therefore be combined into a single performance obligation for each program. Similar to the initial targets, the
Company considered the level of Alexion’s therapeutic expertise specifically related to RNAi, as well as Alexion’s know-how of the Company’s GalXC
conjugates, and concluded that Alexion cannot currently benefit from the granted license on its own or together with other resources that are readily available
to Alexion. As a result, the combination of the license of intellectual property together with the provision of research and development services together
represent the highest level of goods and services that can be deemed distinct. Based on management’s assessments, the Company identified a single
performance obligation, namely, the combined license and research and development services, for each of the two additional targets. At the outset of the
Amendment, the transaction price was determined to be $35.0 million, which is comprised of the $20.0 million in option exercise fees and $15.0 million in
aggregate contingent milestone payments that were probable of achievement and under the Company’s control.

The Company began recognizing revenue under the Alexion Agreements during the year ended December 31, 2018. During the years ended December 31,
2019 and 2018 the Company had recognized $4.4 million and $0.1 million, respectively, as revenue in the accompanying consolidated statement of
operations. The aggregate amount of the transaction price allocated to the Company’s partially unsatisfied performance obligations and recorded as deferred
revenue at December 31, 2019 and 2018 is $53.0 million and $31.3 million, of which $27.9 million and $11.7 million, respectively, is included in current
portion of deferred revenue. As of December 31, 2019, the Company expects the majority of deferred revenue to be recognized through the fourth quarter of
2021.

BI Agreement and related amendments

Background

On October 27, 2017, the Company entered into a collaborative research and license agreement with BI (the “BI Agreement”), pursuant to which the
Company and BI jointly research and develop product candidates for the treatment of chronic liver disease using the GalXC platform, Dicerna’s proprietary
RNAi-based technology. The BI Agreement is for the development of product candidates against one target gene with an option for BI to add the
development of product candidates that target a second gene (the “Second Target”). Pursuant to the BI Agreement, Dicerna granted BI a worldwide license in
connection with the research and development of such product candidates and transferred certain intellectual property rights of the selected product
candidates to BI for clinical development and commercialization. Dicerna also may provide assistance to BI in order to help BI further develop selected
product candidates. Under the terms of the BI Agreement, BI agreed to pay Dicerna a non-refundable upfront payment of $10.0 million for the first target,
less a refundable withholding tax in Germany of $1.6 million. BI also agreed to reimburse Dicerna certain third-party expenses of $0.3 million. The German
withholding tax was withheld by BI and remitted to the German tax authorities in accordance with local tax law. The Company received reimbursement of
this tax in July 2018.

The Company is eligible to receive up to $191.0 million in potential development and commercial milestones related to the initial target. Dicerna is also
eligible to receive royalty payments on potential global net sales, subject to certain adjustments, tiered from high single digits up to low double-digits. BI’s
Second Target option provides for an option fee payment of $5.0 million and success-based development and commercialization milestones and royalty
payments to Dicerna.

Milestone payments that are contingent upon the Company’s performance under the BI Agreement include potential developmental milestones totaling $99.0
million. The Company has excluded these amounts from allocable consideration at the outset of the arrangement, as described below. All potential net sales
milestones, totaling $95.0 million, will be accounted for in the same manner as royalties and recorded as revenue at the later of the achievement of the
milestone or the satisfaction of the performance obligation.

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Accounting Analysis

The Company concluded that BI is a customer in this arrangement, and as such, the arrangement falls within the scope of the revenue recognition
guidance. The Company identified the following promises under the contract: the license of intellectual property and conducting agreed-upon research
program services. The Company concluded that the license and research and development services are not capable of being distinct and are not distinct within
the context of the contract; therefore, the Company considers these to be one performance obligation. The Company concluded that the option underlying the
transfer of future licenses and potential associated research for any not-yet-known target gene is not a performance obligation of the contract at inception
because the option fee reflects the standalone selling price of the option, and therefore, the option is not considered to be a material right. The Company
considered the level of BI’s therapeutic expertise specifically related to RNAi, as well as BI’s know-how with regard to the Company’s GalXC conjugates,
and concluded that BI cannot currently benefit from the granted license on its own or together with other resources that are readily available to BI, including
relationships with oligonucleotide vendors who synthesize GalXC conjugates under contract with the Company. As a result, the combination of the license of
intellectual property together with the provision of research and development support services together represent the highest level of goods and services that
can be deemed distinct.

Based on management’s evaluation, the $10.0 million non-refundable upfront fee and the $0.3 million agreed-upon reimbursable third-party expenses
constituted the amount of the consideration to be included in the transaction price and were allocated to the performance obligation identified. None of the
development milestones have been included in the transaction price during the period, since none of such milestone amounts are within the control of the
Company and are not considered probable to occur until confirmed by BI, at BI’s sole discretion. Any consideration related to commercial sales-based
milestones (including royalties) will be recognized when the related sales occur, since these amounts have been determined to relate predominantly to the
license granted to BI and therefore are recognized at the later of when the performance obligation is satisfied or when the related sales occur. 

The $10.3 million transaction price for the first target was recognized through July 2019, which was the point where the Company’s obligation to provide
research support services to BI for the first target ended. Related revenue was recognized on a straight-line basis, which was, in management’s judgment, an
appropriate measure of progress toward satisfying the performance obligation.

The Company recognized $3.2 million, $6.1 million and $1.0 million during the years ended December 31, 2019, 2018 and 2017, respectively, as revenue
associated with the first target under the BI Agreement in the accompanying consolidated statement of operations. The performance obligation associated
with the first target had been satisfied as of December 31, 2019.

BI contract amendment – Background

In October 2018, BI exercised its Second Target option, which entitled the Company to a non-refundable payment of $5.0 million and reimbursement of $0.7
million for certain third-party expenses upon the agreement of a research work plan and budget for the Second Target. The terms of the Second Target option
exercise and related rights and obligations associated with the Second Target were agreed between the Company and BI in an Additional Target Agreement
(the “ATA”), which was entered into on December 31, 2018.

Under the terms of the ATA, BI is responsible for future clinical development and commercialization of candidate products for the Second Target.
Additionally, during the term of the research program, BI will reimburse the Company for certain expenses. The Company is eligible to receive up to $170.0
million in potential development and commercial milestones related to the Second Target. The Company is also eligible to receive tiered royalty payments on
potential global net sales, subject to certain adjustments, in the mid-single digits. Except as otherwise set forth in the ATA, development of the Second Target
is subject to the terms of the original BI Agreement.

BI contract amendment – Accounting Analysis

The exercise of the Second Target option on December 31, 2018 through the ATA created a new arrangement for accounting purposes, and management
determined that the $5.0 million exercise price with the $0.7 million of reimbursable expenses was representative of the standalone selling price. Consistent
with the reasons described related to the initial target, management concluded that the non-refundable Second Target option exercise fee (akin to an upfront
payment) constituted the amount of the consideration to be included in the transaction price and has been allocated to the single performance obligation. The
basis for the conclusions regarding the treatment of development and sales-based milestones associated with the Second Target are consistent with those
associated with the initial combined performance obligation under the BI Agreement. The Company re-evaluates the transaction price in each reporting period
and as uncertain events are resolved or other changes in circumstances occur.

The Company began recognizing the $5.7 million transaction price as revenue in January 2019 and will continue recognizing as revenue over the Company’s
best estimate of the period during which it will be obligated to provide research support services to BI, currently estimated to end in October 2020.

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Consistent with the first target, revenue is recognized on a straight-line basis, which is in management’s judgment an appropriate measure of progress toward
satisfying the performance obligation. The Company recognized $3.1 million associated with the Second Target under the BI Agreement during the year
ended December 31, 2019. The aggregate amount of the transaction price allocated to the Company’s partially unsatisfied performance obligation and
recorded as deferred revenue at December 31, 2019 is $2.3 million, all of which is included in the current portion of deferred revenue.

In addition to establishing the terms of the Second Target option exercise, the ATA also amends the BI Agreement to provide the parties the opportunity to
consider the development of product candidates targeting a further additional target gene (the “Third Target Option”).

Per the ATA, if BI elects, following Dicerna’s presentation of data for a new product candidate, to exercise the Third Target Option, the parties must also
agree to a research work plan and budget for the additional gene and negotiate development and commercialization milestones and royalty payments to the
Company, and upon such agreement and exercise, BI would make an option fee payment to the Company of $5.0 million. This option exercise fee is
consistent with the Second Target option exercise fee, which management concluded was representative of the standalone selling price. If BI chooses to
exercise the Third Target Option, the Company will be responsible for the discovery and initial profiling of the product candidates, including primary
preclinical studies, synthesis, and delivery. BI will be responsible for evaluating and selecting the product candidates for further development. If BI selects
one or more product candidates, it will be responsible for further preclinical development, clinical development, manufacturing, and commercialization of
those products. If the Third Target Option is exercised, such exercise would result in a new arrangement for accounting purposes, as the licensing rights and
research and development services underlying the Third Target Option are distinct from those associated with the initial and Second Targets.

The following table presents changes in the Company’s aggregate deferred revenue balances for each reporting period:

Deferred revenue, current and noncurrent

Deferred revenue, current and noncurrent

9.    STOCKHOLDERS' EQUITY

Preferred stock

YEAR ENDED
DECEMBER 31, 2019

BALANCE AT
BEGINNING OF
PERIOD

ADDITIONS

DEDUCTIONS

BALANCE AT END
OF PERIOD

183,186   $

235,631   $

(23,829)   $

394,988

YEAR ENDED
DECEMBER 31, 2018

BALANCE AT
BEGINNING OF
PERIOD

ADDITIONS

DEDUCTIONS

BALANCE AT END
OF PERIOD

9,270   $

180,092   $

(6,176)   $

183,186

$

$

The Company has authorized up to 5,000,000 shares of preferred stock, $0.0001 par value per share, for issuance. The preferred stock will have such rights,
preferences, privileges and restrictions, including voting rights, dividend rights, conversion rights, redemption privileges, and liquidation preferences, as shall
be determined by the Company’s board of directors upon its issuance. At December 31, 2019 and 2018, there were no shares of preferred stock outstanding.

As further disclosed in Note 10, during the year ended December 31, 2017, the Company issued and sold in a private placement 700,000 shares of its newly
designated redeemable convertible preferred stock, par value $0.0001 per share. Redeemable convertible preferred shares and the shares of common stock
issuable upon conversion of the redeemable convertible preferred stock were offered and sold by the Company pursuant to an exemption from the registration
requirements of the Securities Act provided by Section 4(a)(2) thereunder. On December 18, 2017, the Company completed the conversion of the redeemable
convertible preferred stock and issued an aggregate of 24,206,663 shares of the Company’s common stock.

Issuances of Common Stock

On December 18, 2017, the Company completed an underwritten follow-on public offering of 5,714,286 shares of common stock (the “2017 Offering”),
which was made pursuant to the Company’s effective registration statement on Form S-3 previously filed with the Securities and Exchange Commission
(“SEC”). In connection with the 2017 Offering, the Company entered into an underwriting agreement (the “2017 Underwriting Agreement”) with Stifel,
Nicolaus & Company, Incorporated and Evercore Group LLC as representatives of the underwriters listed in the 2017 Underwriting Agreement (collectively,
the “2017 Underwriters”), pursuant to which the Company granted to the 2017 Underwriters a 30-day option to purchase up to an additional 857,143 shares
of the

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Company’s common stock (the “Overallotment”). The Company completed the sale of 6,571,428 shares, inclusive of the Overallotment, to the 2017
Underwriters on December 18, 2017, and that sale resulted in the receipt by the Company of aggregate gross proceeds of $46.0 million, less underwriter
commissions and additional offering expenses totaling approximately $3.2 million.

On April 20, 2018, the Company entered into a Share Issuance Agreement with Alnylam (“Alnylam Share Issuance Agreement”), pursuant to which the
Company agreed to issue to Alnylam 983,208 shares in satisfaction of the Company’s obligation under the Settlement Agreement to deliver shares to
Alnylam (see Note 15). The Alnylam Share Issuance Agreement contains customary representations and warranties of each party. The transaction
contemplated by the Alnylam Share Issuance Agreement was closed on April 24, 2018.

On September 11, 2018, the Company completed an underwritten follow-on public offering of 7,680,492 shares of common stock (the “2018 Offering”). In
connection with the 2018 Offering, the Company entered into an underwriting agreement (the “2018 Underwriting Agreement”) with Citigroup Global
Markets Inc. and Leerink Partners LLC as representatives of the underwriters listed in the 2018 Underwriting Agreement (collectively, the “2018
Underwriters”), pursuant to which the Company granted to the 2018 Underwriters a 30-day option to purchase up to an additional 1,152,073 shares of the
Company’s common stock. Upon completion of the sale of 8,832,565 shares to the 2018 Underwriters, the Company received gross proceeds of $115.0
million.

In connection with the Alexion Collaboration Agreement, the Company and Alexion entered into the Alexion Share Issuance Agreement on October 22,
2018, pursuant to which the Company sold to Alexion 835,834 shares of the Company’s common stock at $17.95 per share for an aggregate purchase price of
approximately $15.0 million, of which $9.1 million was allocated to the share issuance for accounting purposes.

In connection with the Lilly Collaboration Agreement, the Company and Lilly entered into the Lilly Share Issuance Agreement on October 25, 2018, pursuant
to which the Company sold to Lilly 5,414,185 shares of common stock at $18.47 per share for an aggregate purchase price of approximately $100.0 million,
of which $51.3 million was allocated to the share issuance for accounting purposes. The closing of the transactions contemplated by the Lilly Collaboration
Agreement and the Lilly Share Issuance Agreement occurred on December 19, 2018.

In connection with the Novo Collaboration Agreement, the Company and Novo entered into the Novo Share Issuance Agreement on November 15, 2019,
pursuant to which the Company sold to Novo 2,279,982 shares of common stock at $21.93 per share for an aggregate purchase price of approximately $50.0
million, of which $45.8 million was allocated to the share issuance for accounting purposes. The closing of the transactions contemplated by the Novo
Collaboration Agreement and the Novo Share Issuance Agreement occurred on December 27, 2019.

10.    REDEEMABLE CONVERTIBLE PREFERRED STOCK

On April 11, 2017, pursuant to a redeemable convertible preferred stock purchase agreement (“SPA”) with seven institutional investors (the “Preferred
Holders”), led by funds advised by Bain Capital Life Sciences L.P. (“Lead Investor”), the Company issued and sold in a private placement 700,000 shares of
its newly designated redeemable convertible preferred stock, par value $0.0001 per share, at a purchase price of $100.00 per share, for total gross proceeds of
$70.0 million (“Private Placement”), less issuance costs of approximately $0.8 million. The redeemable convertible preferred shares and the shares of
common stock issuable upon conversion of the redeemable convertible preferred stock were offered and sold by the Company pursuant to an exemption from
the registration requirements of the Securities Act provided by Section 4(a)(2) thereunder.

In addition to the Lead Investor, other participants in the Private Placement included affiliates of Cormorant Asset Management, LLC, Domain Associates,
LLC (“Domain Associates”), EcoR1 Capital, LLC, RA Capital Management, LLC (“RA Capital”) and Skyline Management LLC (“Skyline Ventures”),
among others. Domain Associates, RA Capital and Skyline Ventures are entities that are affiliated or were formerly affiliated with certain members of the
Company’s board of directors. On March 28, 2017, in accordance with the terms of the SPA, the Company increased the size of its board of directors from
eight to nine directors and approved the appointment of Adam M. Koppel, M.D., Ph.D., a managing director of the Lead Investor, as a director of the
Company, effective as of the closing of the Private Placement on April 11, 2017. Dr. Koppel was reelected to the Company’s board of directors by shareholder
vote in June 2017.

The redeemable convertible preferred stock had the rights and preferences set forth in a Certificate of Designation, which was filed with the Secretary of State
of the State of Delaware.

Inducement and conversion

On December 13, 2017, in connection with the 2017 Offering, defined and discussed in Note 9, the Company entered into a letter agreement (the “Letter
Agreement”) with the Preferred Holders. Pursuant to the Letter Agreement, the Preferred Holders agreed,

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subject to the completion of the 2017 Offering, to optionally convert all of their shares of redeemable convertible preferred stock, to the extent not subject to
Conversion Blockers, into common stock, and consented, where applicable, to the repurchase of the residual shares of common stock that would have been
issuable but for the Conversion Blockers (the “Residual Shares”) for $0.0001 per share. “Conversion Blockers” refers to the beneficial ownership limitations
in the Company’s Certificate of Designation of the redeemable convertible preferred stock, which included (i) a 19.99% blocker provision to comply with
Nasdaq Listing Rules, (ii) if so elected by a holder, a 9.99% blocker provision that would have prohibited beneficial ownership of more than 9.99% of the
outstanding shares of the Company’s common stock or voting power at any time, and (iii) ownership limitations resulting from applicable regulatory
restrictions.

The Letter Agreement also provided for Preferred Holders to waive and amend certain provisions in an amended and restated registration rights agreement by
and among the Company and the Preferred Holders party thereto (the “Registration Rights Agreement”). In consideration for the Preferred Holders’ agreeing
to the optional conversion of the redeemable convertible preferred stock and to a waiver under and certain amendments to the Registration Rights Agreement,
the Company agreed to issue to the Preferred Holders pre-funded warrants (the “Pre-Funded Warrants”), exercisable in part or in whole at any time upon
grant for shares of the Company’s common stock at a price per share of $0.0001 per share. Each Preferred Holder was entitled to elect to receive shares of the
Company’s common stock in lieu of the Pre-Funded Warrants that otherwise would have been issued to such Preferred Holder subject to any applicable
Conversion Blockers. Under the Letter Agreement, the number of shares allocable to each Preferred Holder was calculated based on the sum of (i) the number
of shares of common stock into which the additional dividend accruals on the redeemable convertible preferred stock that such Preferred Holders would have
been entitled to receive up to and including March 31, 2018 would have been convertible, calculated immediately prior to the effectiveness of the conversion
and (ii) any Residual Shares repurchased, or to be repurchased, from such Preferred Holder by the Company as described above (collectively, the “Additional
Investor Shares”). The formula for the Additional Investor Shares assumes (1) a conversion price of $3.19 per share of common stock; (2) application of a
dividend rate of 12% per annum from April 11, 2017 to October 27, 2017 and (3) application of a dividend rate of 8% per annum commencing from
October 27, 2017 through March 31, 2018.

On December 18, 2017, the Company completed the conversion of the redeemable convertible preferred stock and issued an aggregate of 24,206,663 shares
of the Company’s common stock. No Pre-Funded Warrants were issued in connection with the conversion of the redeemable convertible preferred stock, as
all Preferred Holders opted to receive common shares in lieu of Pre-Funded Warrants, largely given the inapplicability of Conversion Blockers as of the date
of conversion, immediately after which no shares of redeemable convertible preferred stock remained outstanding.

On December 29, 2017, the Company filed with the Secretary of State of the State of Delaware a Certificate of Elimination of the Redeemable Convertible
Preferred Stock, which eliminates from the Company’s Certificate of Incorporation all matters set forth in the Certificate of Designation of Redeemable
Convertible Preferred Stock previously filed with the Secretary of State of the State of Delaware, which established and designated the redeemable
convertible preferred stock and the rights, powers, preferences, privileges and limitations thereof.

Upon conversion of the redeemable convertible preferred stock, the Company applied the guidance outlined in the FASB’s Accounting Standard Codification
(“ASC”) Topic 470-20, Debt with Conversion and Other Options (“ASC 470-20”), which contains guidance addressing the accounting for induced
conversions of convertible debt, which in turn, per the U.S. Securities and Exchange Commission’s (“SEC”) guidance codified in ASC Topic 260, Earnings
per Share (“ASC 260”), should be applied also to induced conversions of convertible preferred stock.

The Company applied the guidance provided in ASC 260-10-S99-2 and compared the fair value of common stock transferred in the conversion transaction to
the Preferred Holders to the fair value of common stock issuable pursuant to the original conversion terms. The resulting excess, which amounted to
approximately $3.8 million, was recorded as a deemed dividend on conversion of the redeemable convertible preferred shares and has been added to net loss
to arrive at net loss attributable to common stockholders in the accompanying consolidated statement of operations for the year ended December 31, 2017.

Dividends

Each holder of redeemable convertible preferred stock had been entitled to receive cumulative dividends on the Accrued Value, as defined below, of each
share of redeemable convertible preferred stock at an initial rate of 12% per annum, compounded quarterly and subject to two rate reductions of 4% each in
connection with the occurrence of one of the agreed-upon milestone events. Entering into the BI Agreement, as defined and discussed in Note 8, constituted,
per the Certificate of Designation, a milestone event for purposes of applying the first of two allowable rate reductions to dividends payable on the
redeemable convertible preferred stock. As such, the dividend rate on the redeemable convertible preferred stock was reduced from 12% to 8% effective on
October 27, 2017. Dividends on the redeemable convertible preferred stock accrued on the Accrued Value of each share of redeemable convertible preferred
until the conversion thereof, which occurred on December 18, 2017, as discussed above. “Accrued Value” meant, with respect to each share of redeemable
convertible preferred stock, the sum of (i) $100.00 plus (ii) on each quarterly dividend date, an additional amount equal

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to the dollar value of any dividends on a share of redeemable convertible preferred stock which had accrued on any dividend payment date and had not
previously been added to such Accrued Value.

For accounting purposes, in accordance with ASC Topic 480-10-S99, Distinguishing Liabilities from Equity – SEC Materials (“ASC 480-10-S99”), the
Company recorded the dividends at fair value at each dividend declaration date. The fair value of the dividends was determined using a binary lattice model
that captured the intrinsic value of the underlying common stock on the declaration date and the option value of the shares and future dividends.

The lattice model was used to determine fair value of dividends on each dividend date through September 30, 2017, which was the last dividend date prior to
conversion of the redeemable convertible preferred shares, included the following inputs:

Price per common share

Expected term (in years)

Expected volatility

Risk-adjusted discount rate

$

JUNE 30, 
2017

SEPTEMBER 30, 
2017

  $

3.17

6.75

70.0%  

18.0%  

5.75

6.50

73.0%

19.1%

In addition to the inputs presented above, use of the lattice model applied other assumptions, including probability simulations of various outcomes largely
associated with the conversion-related milestone events referred to above and with the progression of the Company’s per common share price. Use of the
lattice model resulted in a fair value estimate of the aggregate dividends declared on June 30, 2017 and September 30, 2017 of $1.9 million and $4.1 million,
respectively.

Beneficial conversion feature

In accordance with ASC Topic 470-20, the Company recorded a beneficial conversion feature (“BCF”) related to the issuance of the redeemable convertible
preferred. The BCF was recognized separately at issuance by allocating a portion of the proceeds equal to the intrinsic value of that feature to additional paid-
in capital. The BCF was calculated at the commitment date, which management has determined to be the date of issuance. Intrinsic value is calculated as the
difference between the effective conversion price and the fair value of the Company’s common stock, multiplied by the number of shares into which the
issued shares of redeemable convertible preferred shares are convertible. During the year ended December 31, 2017, the Company recorded a deemed
dividend charge of $6.1 million, to reflect full and immediate accretion of the discount resulting from the at-issuance BCF embedded within the redeemable
convertible preferred stock as a result of the shares being immediately convertible into shares of the Company’s common stock at the option of the Preferred
Holders.

Accretion of the discount resulting from the BCF and cumulative dividends, including accretion of share issuance costs, were non-cash transactions and have
been reflected below net loss to arrive at net loss attributable to common stockholders.

The following table reflects the changes in redeemable convertible preferred shares recorded during the year ended December 31, 2017:

Balance at January 1, 2017

Issuance of redeemable convertible preferred shares

Share issuance costs

Net proceeds

Discount resulting from the BCF at issuance

Accretion of the discount resulting from the BCF (deemed dividend)

Dividends accrued at the stated rates

Fair value in excess of dividends accrued at the stated rates

Accretion of share issuance costs (additional dividends)

Balance immediately prior to conversion

Conversion of redeemable convertible preferred shares

Balance at December 31, 2017

112

$

$

—

70,000

(750)

69,250

(6,144)

6,144

5,515

3,846

750

79,361

(79,361)

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11.    STOCK-BASED COMPENSATION

Equity Incentive Plans

As of December 31, 2019, the Company’s approved equity incentive plans include: the Third Amended and Restated 2007 Employee, Director and
Consultant Stock Plan (“2007 Plan”); the 2010 Employee, Director and Consultant Equity Incentive Plan (“2010 Plan”); the 2014 Employee Stock Purchase
Plan (“2014 ESPP”); the Amended and Restated 2014 Performance Incentive Plan (“2014 Plan”); and the 2016 Inducement Plan (“2016 Plan”). These plans
are administered by the board of directors and permit the granting of stock options, stock appreciation rights, stock bonuses, restricted stock, performance
stock, stock units, phantom stock, or similar rights to purchase or acquire shares. Upon adoption of the 2014 Plan, the Company no longer grants new equity
awards under its 2007 Plan or 2010 Plan.

Amended and Restated 2014 Performance Incentive Plan

On January 14, 2014, the board of directors adopted the 2014 Plan which authorized the issuance of up to 1,900,000 shares of the Company’s common stock,
with an additional increase on the first trading day in January of each calendar year during the term of the plan by an amount equal to 4% of the total number
of shares of Common Stock issued and outstanding on December 31 of the immediately preceding calendar year. In June 2015, the 2014 Plan was amended to
increase the replenishment percentage from 4% to 5% of outstanding common shares annually and to allow the reissuance thereunder of awards and grants
that expire or are canceled, terminated, forfeited, or fail to vest under the 2007 Plan and 2010 Plan, as amended. Stock options for new hires granted under
this plan generally vest 25% after 12 months, followed by ratable vesting over the remaining 36-month term and expire 10 years from the grant date. Annual
promotional and incentive-related grants generally vest ratably over a period of 48 months. As of December 31, 2019, there were 8,575,043 stock options
outstanding and 1,371,670 shares of common stock reserved for future issuance under the 2014 Plan.

Inducement Grants

During 2014 and 2015, the Company granted 470,272 and 450,700 stock options, respectively, as an inducement material to individuals entering into
employment with the Company (“Inducement Grants”). The Inducement Grants were approved by the Compensation Committee of the Company’s board of
directors and were awarded in accordance with Nasdaq Listing Rule 5635(c)(4) and outside of the 2014 Plan. As such, any shares underlying the Inducement
Grants are not, upon forfeiture, cancellation, or expiration, returned to a pool of shares reserved for future issuance. As of December 31, 2019, there were
130,000 Inducement Grants that remained outstanding.

2016 Inducement Plan

On March 4, 2016, the board of directors adopted the 2016 Plan pursuant to which the Company may grant options to purchase common shares as an
inducement to individuals to join the Company. The 2016 Plan, as adopted, allowed the Company to deliver up to 250,000 shares (the “Share Limit”) of its
common stock to eligible persons, as defined. The Share Limit is subject to adjustment as contemplated by the provisions of the 2014 Plan. In February and
May 2017, the Share Limit was adjusted to increase the pool of issuable options by 125,000 and 200,000 underlying shares, respectively. On December 11,
2018, the board of directors approved a resolution to further increase the Share Limit under the 2016 Plan by 2,700,000 to 3,275,000 underlying shares. In
December 2019, the Company’s Board of Directors authorized an additional 2,900,000 shares for issuance under the 2016 Plan. As of December 31, 2019,
there were 3,005,313 stock options outstanding and 3,043,500 shares of common stock reserved for future issuance under the 2016 Plan.

Stock-based compensation expense

The Company has classified stock-based compensation expense in its consolidated statements of operations as follows:

Research and development

General and administrative

Total

YEAR ENDED
DECEMBER 31,

2019

2018

2017

$

$

8,413   $

10,409  

18,822   $

3,062   $

4,826  

7,888   $

3,536

4,234

7,770

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Stock options

Expected volatility for the Company’s common stock was determined based on an average of the historical volatility of a peer group of similar companies due
to limited historical volatility of the Company’s own common stock. The Company also has limited stock option exercise information, and as such, the
expected term of stock options granted was calculated in most cases using the simplified method, which represents the average of the contractual term of the
stock option and the weighted-average vesting period of the stock option. The assumed dividend yield is based upon the Company’s expectation of not paying
dividends in the foreseeable future. The risk-free rate for periods within the expected life of the stock option is based upon the U.S. Treasury yield curve in
effect at the time of grant.

The assumptions used in the Black-Scholes option-pricing model for all stock options granted during each period presented are as follows:

Common stock price

Expected option term (in years)

Expected volatility

Risk-free interest rate

Expected dividend yield

The table below summarizes the activity under the Company’s equity incentive plans:

2019
$10.31 - $26.48

5.28 - 6.08

YEAR ENDED
DECEMBER 31,

2018
$9.14 - $15.74

5.50 - 6.25

2017
$2.49 - $9.71

5.50 - 6.25

78.3% - 80.8%  

75.9% - 78.3%  

79.4% - 91.1%

1.4% - 2.6%

2.3% - 3.0%

1.9% - 2.2%

0.0%

0.0%

0.0%

OUTSTANDING – JANUARY 1, 2019

Granted

Exercised

Forfeited/Canceled

Expired

OUTSTANDING – DECEMBER 31, 2019

EXERCISABLE – DECEMBER 31, 2019

VESTED AND EXPECTED TO VEST – DECEMBER 31, 2019

NUMBER 
OF 
OPTIONS

7,787,690  

5,934,000  

(963,318)  

(268,022)  

(23,200)  

12,467,150  

5,987,801  

11,852,807  

WEIGHTED- 
AVERAGE
EXERCISE
PRICE

WEIGHTED- 
AVERAGE 
REMAINING 
CONTRACTUAL 
TERM (YEARS)

AGGREGATE
INTRINSIC VALUE

$9.36    

$13.23    

$6.90    

$10.20    

$3.42    

$11.38  

$10.27  

$11.27  

7.4   $

5.8   $

7.3   $

133,548

70,406

128,199

The weighted-average grant date fair value of stock options granted during the years ended December 31, 2019, 2018, and 2017 was $9.11, $7.64, and $2.52
per share, respectively. As of December 31, 2019, there was $52.0 million of unrecognized compensation cost related to unvested employee stock options
which are expected to be recognized over a weighted-average period of 3.0 years. The intrinsic value of stock options exercised was $15.2 million, $2.9
million, and $0.1 million for the years ended December 31, 2019, 2018, and 2017, respectively.

The Company does not currently hold any treasury shares. Upon stock option exercise, the Company issues new shares and delivers them to the participant.

Restricted common stock

In 2014, the Company issued a total of 44,000 shares of the Company’s restricted common stock, of which 4,000 shares were fully vested at the grant date
and the remaining shares were scheduled to vest in equal tranches over a four-year period on the anniversary date of the related grant. The fair value of these
shares totaled $0.7 million at the grant date, representing a weighted-average grant date fair value per share of $16.30.

At December 31, 2017, there were 10,000 shares of the Company’s restricted common stock remaining outstanding with a weighted-average grant date fair
value of $16.30. During the year ended December 31, 2018, all 10,000 shares of restricted common stock with a weighted-average grant date fair value of
$16.30 vested and there are no outstanding shares of restricted common stock at December 31, 2018. The total fair value of restricted common stock vested
during the year ended December 31, 2018 was $0.1 million. The total fair value of restricted common stock that vested during the year ended December 31,
2017 was immaterial.

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Common stock warrants

During the year ended December 31, 2018, certain warrant holders exercised warrants to purchase 85,703 shares of the Company’s common stock on a net
basis and received 45,710 shares of common stock, and 39,993 shares were used to cover the exercise price of $7.00 per share.

At both December 31, 2018 and 2019, there were 2,198 common stock warrants remaining outstanding with an exercise price of $250.00 per share. The
remaining contractual life of the common stock warrants as of December 31, 2018 and 2019 was 1.46 years and 0.46 years, respectively.

Employee stock purchase plan

On January 28, 2014, the Company’s stockholders approved the 2014 ESPP, which authorized the issuance of up to 1,000,000 shares of common stock
thereunder. The 2014 ESPP provides for an automatic reserve increase equivalent to the lesser of 1% of the total number of shares of common stock issued
and outstanding on December 31 of the immediately preceding calendar year and 1,000,000 shares of common stock, unless otherwise determined by the
Company’s board of directors. As of December 31, 2019, there were 2,789,898 shares of common stock authorized and 2,404,287 shares of common stock
available for issuance under the 2014 ESPP.

Eligible employees may purchase shares of the Company’s common stock through regular payroll deductions up to 15% of their eligible compensation. Under
the terms of the offering under the 2014 ESPP, the number of shares purchased by an individual participant in the plan may not exceed 10,000 shares in any
one purchase period. In addition, the fair market value of shares purchased by an individual participant in the plan may not exceed $25,000 if the contribution
period is within any one calendar year. Participants are allowed to terminate their participation in the ESPP at any time during the purchase period prior to the
purchase of the shares. The offering periods have a 24‑month term, which consists of four purchase periods, each of which is six months in duration. New
offering periods commence on the first day of January and July each year and end on the last business day of the immediately following June or December,
respectively.

The per-share purchase price at the end of each offering period is equal to the lesser of 85% of the fair market value of the common stock on the grant date of
the offering period to which the purchase period relates or 85% of the fair market value of the common stock on the purchase date of the applicable purchase
period. In the event that the fair value of the common stock on any purchase date during an offering period is lower than the fair market value of the common
stock on the grant date of that offering period, that offering period will terminate on such purchase date, and each participant in such terminated offering
period will be automatically enrolled in the new offering period that commences on the first business day of the next offering period that immediately follows
such purchase date.

Shares issued under the 2014 ESPP are considered compensatory. Accordingly, the Company is required to measure the fair value of the stock purchase rights
granted and record compensation expense for share purchase rights granted under the 2014 ESPP. The fair values of the stock purchase rights are estimated
using the Black-Scholes option-pricing model, which relies on a number of key assumptions in calculating the estimates of fair value. Stock-based
compensation expense related to stock purchase rights under the 2014 ESPP was $0.7 million, $0.1 million, $0.4 million for the years ended December 31,
2019, 2018, and 2017, respectively.

During the years ended December 31, 2019, 2018, and 2017, the Company issued 122,999, 118,239, and 84,890 shares of common stock under the
2014 ESPP, respectively. The weighted-average purchase prices of shares issued under the 2014 ESPP were $6.97, $2.61, and $2.45 per share for the years
ended December 31, 2019, 2018, and 2017, respectively.

12.    401(K) PROFIT SHARING PLAN AND TRUST

The Company has a 401(k) Profit Sharing Plan and Trust (“401(k) Plan”), which is a retirement plan in which substantially all employees are eligible to
participate. Eligible employees may elect to contribute up to the maximum limits, as set by the Internal Revenue Service, of their eligible compensation.
Under the terms of the 401(k) Plan, employees may elect to make pre-tax and Roth contributions through payroll deductions within statutory and plan limits.
The Company makes matching contributions of 300% of eligible employee salary deferrals that do not exceed 2% of the eligible participant’s compensation.
All matching contributions vest immediately. Each year, the Company may also make a discretionary profit-sharing contribution to the plan. Such
contributions to the Plan are allocated among eligible participants in the proportion of their salaries to the total salaries of all participants.

Expense recognized by the Company for matching contributions made to the 401(k) Plan was $1.2 million, $0.6 million, and $0.4 million for the years ended
December 31, 2019, 2018, and 2017, respectively. There were no discretionary profit-sharing contributions made by the Company during the years ended
December 31, 2019, 2018, or 2017.

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13.    INCOME TAXES

The Company has no current and no deferred income tax expense for the years ended December 31, 2019 and 2018. The Company did not record a federal
income tax provision or benefit for the years ended December 31, 2019, 2018, and 2017.

The reconciliation between income taxes computed at the federal statutory income tax rate and the provision for (benefit from) income taxes is as follows:

Federal statutory rate

Effect of:

Foreign rate differential

Tax reform

Net operating loss limitation

Change in valuation allowance
Foreign income/GILTI(a)
Stock-based compensation expense

Other

Total

(a)GILTI represents Global Intangible Low-Tax Income

The components of the Company’s deferred tax assets and liabilities are as follows:

Deferred tax assets:

Net operating loss carryforwards

Capitalized research and development costs

Research and development credit carryforwards

Lease liability

Stock-based compensation expense

Depreciation expense and other costs

Deferred tax assets

Deferred tax liabilities:

Right-of-use asset

Intangible assets

Deferred revenue

Deferred tax liabilities

Valuation allowance

Net deferred tax assets

YEAR ENDED
DECEMBER 31,

2019

2018

2017

21.0 %  

21.0 %  

34.0 %

(5.9)%  

— %  

17.0 %  

(29.7)%  

(8.0)%

1.7 %  

3.9 %  

— %  

(9.5)%  

— %  

(23.0)%  

10.6 %  

— %

0.4 %  

0.5 %  

— %  

(17.6)%

(29.6)%

— %

13.5 %

— %

(0.8)%

0.5 %

— %

DECEMBER 31,

2019

2018

$

58,319   $

24,739

415  

7,386  

6,905  

11,751  

408  

85,184  

(6,833)  

(1,939)  

(492)    

(9,264)  

(75,920)  

$

—   $

516

3,988

—

7,644

75

36,962

—

—

—

(36,962)

—

On December 22, 2017, the Tax Cuts and Jobs Act (the “TCJA”) was signed into law in the United States. The TCJA reduced the U.S. corporate tax rate from
34% to 21% for tax years beginning after December 31, 2017. Other relevant provisions of the TCJA did not have a material impact on the accompanying
consolidated financial statements.

As a result of certain changes in applicable Cayman Islands law, certain changes in U.S. tax law, and related business considerations, we undertook certain
restructuring transactions in 2019 that resulted in the liquidation of Dicerna Cayman, which was a wholly owned subsidiary of Dicerna Pharmaceuticals, Inc.
that previously held intellectual property rights. That liquidation was accomplished initially via an election to treat Dicerna Cayman as a disregarded entity
separate from Dicerna Pharmaceuticals, Inc. for U.S. federal income tax purposes, effective July 1, 2019; thereafter, Dicerna Cayman was dissolved under
applicable Cayman Islands law. As a result of these transactions, all the pre-liquidation assets and liabilities of Dicerna Cayman, including certain intellectual
property rights, are now assets and liabilities of Dicerna Pharmaceuticals, Inc.

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Management has evaluated the positive and negative evidence bearing upon the realizability of the Company’s net deferred tax assets and has determined that
it is more likely than not that the Company will not recognize the benefits of the net deferred tax assets. As a result, the Company has recorded a full
valuation allowance at December 31, 2019 and 2018.

Realization of the future tax benefits is dependent on many factors, including the Company’s ability to generate taxable income within the net operating loss
carryforward period. Under the provisions of the Internal Revenue Code (“IRC”), certain substantial changes in the Company’s ownership, including a sale of
the Company or significant changes in ownership due to sales of equity, may have limited, or may limit in the future, the amount of net operating loss
carryforwards which could be used annually to offset future taxable income. As of December 31, 2019, the Company has approximately $202.8 million of net
operating losses, of which $125.1 million are subject to the IRC 382 limitation. None of these IRC 382 limited net operating losses are expected to expire
before utilization.

As of December 31, 2019, the Company had approximately $202.8 million of federal and $196.6 million of state net operating loss carryforwards. If not
utilized, the federal and state net operating loss carryforwards expire starting in 2029 and 2030, respectively. Additionally, as of December 31, 2019, the
Company had $7.1 million of federal and $3.3 million of Massachusetts tax credits that expire starting in 2028 and 2023, respectively.

As of December 31, 2019, the Company had $3.0 million of unrecognized tax benefits, all of which would affect income tax expense if recognized, before
consideration of the Company’s valuation allowance. The Company does not expect the unrecognized tax benefits to change significantly over the next 12
months. The Company recognizes both interest and penalties associated with uncertain tax positions as a component of income tax expense. As of
December 31, 2019 and 2018, the Company had no accrued penalties or provisions for interest.

A reconciliation of the gross unrecognized tax benefits are as follows:

Unrecognized tax benefits at the beginning of the period

Additions for current tax positions

Changes for previous tax positions

Unrecognized tax benefits at the end of the period

YEAR ENDED 
DECEMBER 31,

2019

2018

$

$

1,631   $

1,426  

(17)  

3,040   $

1,451

211

(31)

1,631

The Company files income tax returns in the United States, the Commonwealth of Massachusetts, Colorado, Maryland, North Carolina, New York, and New
Jersey. The tax years 2008 through 2018 remain open to examination by these jurisdictions, as carryforward attributes generated in past years may be adjusted
in a future period. The Company is not currently under examination by the Internal Revenue Service or any other jurisdiction for these years. The Company
has not recorded any interest or penalties for unrecognized tax benefits since its inception.

14.    LEASES

On July 11, 2014, the Company executed a noncancelable operating lease for office and laboratory space in Cambridge, Massachusetts (the “First Cambridge
Lease”). The lease agreement, the term of which commenced on December 1, 2014, obligates the Company to make minimum payments totaling $9.6 million
over a six-year lease term ending November 30, 2020. The Company has the option to extend the lease term for one additional five-year period. Rent expense
is recorded on a straight-line basis. As part of the Company’s lease agreement, the Company established a letter of credit, secured by a money market
investment, the balance of which is presented as restricted cash equivalents at December 31, 2019 and 2018. The Company also leases a small office in
Cambridge, Massachusetts which has a 30-month term without a renewal option (the “Second Cambridge Lease” and together with the First Cambridge
Lease, the “Cambridge Leases”).

In addition, on January 2, 2019, Dicerna executed a lease for laboratory and office space in Lexington, Massachusetts (the “Lexington Lease”) that
commenced for accounting purposes on November 3, 2019. The term of the Lexington Lease is seven years with approximately $30.1 million in fixed
payments and consideration for the first partial calendar month. The Company has the option to extend the lease term at a prevailing market rate as of the
extension date, which is seven years after the Lexington Lease commencement date. As part of the Company’s lease agreement, the Company is required to
establish a $2.8 million letter of credit, secured by money market investments, which is presented as restricted cash equivalents at December 31, 2019.

On August 26, 2019, the Company entered into a lease agreement for 15,781 square feet of office space in Boulder, Colorado (the “Boulder Lease”) that had
not commenced for accounting purposes as of December 31, 2019. Due to the fact that the Boulder Lease

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had not commenced as of December 31, 2019, the Company has not yet recognized a ROU asset or lease liability on the consolidated balance sheet for the
Boulder Lease; however, the Company is currently utilizing a small amount of temporary office space as provided for in the Boulder Lease. The term of the
lease is 87 full calendar months plus any partial month from the commencement date to the end of the month in which the commencement date falls with
approximately $3.0 million in aggregate fixed payments over the term of the lease arrangement. The Boulder Lease also provides the option to extend the
term for up to two additional periods of 60 months each. As part of the agreement for the Boulder Lease, the Company was required to establish a $0.4
million letter of credit, secured by money market investments, which is presented as restricted cash equivalents at December 31, 2019. On February 4, 2020,
the Company entered into an amendment to a real property lease agreement for our office location in Boulder, Colorado; refer to Note 17 – Subsequent
Events for further information. The Company currently expects the lease of the space under the amendment to commence for accounting purposes in the first
quarter of 2020, and expects to commence occupancy of the remainder of the facility in the second quarter of 2020.

Payments due under each lease agreement include fixed and variable payments. Variable payments relate to the Company’s share of the lessors’ operating
costs associated with the underlying assets and are recognized when the event on which those payments are assessed occurs. None of the Company’s
operating leases contain residual value guarantees.

The interest rate implicit in lease agreements is typically not readily determinable, and as such, the Company utilizes the incremental borrowing rate to
calculate lease liabilities, which is the rate incurred to borrow, on a collateralized basis over a similar term, an amount equal to the lease payments in a similar
economic environment. ROU assets from finance leases are recorded within property and equipment on the consolidated balance sheets.

Future lease payments for noncancelable leases as of December 31, 2019 is as follows:

2020

2021

2022

2023

2024

Thereafter

Total undiscounted lease payments

Less: imputed interest expense

Total lease liabilities

OPERATING LEASES (1)
$

5,968   $

4,244  

4,172  

4,297  

4,426  

8,853  

31,960  

(8,003)  

23,957   $

$

FINANCE LEASE

52

48

48

48

44

—

240

(45)

195

__________________________
(1) Excluded from the table above are lease payments associated with our newest lease in Lexington, Massachusetts that has not commenced for accounting purposes as of
December 31, 2019. Under generally accepted accounting principles, the commencement date is the date on which the asset is made available to the Company by the lessor.

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The components of lease cost in the Company’s consolidated statements of operations are as follows:

Operating leases

Fixed lease cost

Variable lease cost

Total operating lease cost

Finance lease

Amortization expense

Interest expense

Total finance lease cost

YEAR ENDED
DECEMBER 31,

2019

2018

2017

$

$

$

$

2,747   $

1,915  

4,662   $

1,634   $

—  

1,634   $

6   $

3  

9   $

—   $

—  

—   $

1,582

—

1,582

—

—

—

Amounts reported in the consolidated balance sheet for leases in which the Company is the lessee as of December 31, 2019 were as follows:

Lease ROU assets

Lease liabilities

Weighted-average remaining lease term

Weighted-average discount rate

Other information related to the Company’s leases is as follows:

Cash paid for amounts included in the measurement of lease liabilities

Operating cash flows from operating leases

Financing cash flows from finance leases

Right-of-use assets obtained in exchange for lease liabilities

Operating leases

Finance leases

OPERATING LEASES
30,102

$

  $

FINANCE
LEASES

23,957

6.48

9.00%  

YEAR ENDED
DECEMBER 31,

186

195

4.88

9.00%

2019

2018

2017

8,966   $

—   $

1,634   $

—   $

1,582

—

32,412   $

193   $

—   $

—   $

—

—

$

$

$

$

15.    COMMITMENTS AND CONTINGENCIES

On June 10, 2015, Alnylam filed a complaint against the Company in the Superior Court of Middlesex County, Massachusetts. The complaint alleged
misappropriation of confidential, proprietary, and trade secret information, as well as other related claims, in connection with the Company’s hiring of a
number of former employees of Merck & Co., Inc. (“Merck”) and its discussions with Merck regarding the acquisition of its subsidiary, Sirna Therapeutics,
Inc., which was subsequently acquired by Alnylam.

On April 18, 2018, the Company and Alnylam entered into the Settlement Agreement, resolving all ongoing litigation between the Company and Alnylam.
Pursuant to the terms of the Settlement Agreement, the Company agreed to make the following payments to Alnylam: (i) a $2.0 million upfront payment in
cash, which the Company made in May 2018; (ii) an additional $13.0 million in cash to be paid as 10% of any upfront or first year cash consideration that the
Company receives pursuant to future collaborations related to Ga1NAc-conjugated RNAi research and development (excluding any amounts received or to be
received by the Company from its existing collaboration with BI), provided that the $13.0 million must be paid by no later than April 28, 2022; and (iii)
issuance of shares of the Company’s common stock pursuant to the Alnylam Share Issuance Agreement.

Under the Settlement Agreement, for periods ranging from 18 months up to four years, the Company will be restricted in its development and other activities
relating to oligonucleotide-based therapeutics directed toward a defined set of eight Alnylam targets (the “Oligo Restrictions”). The Oligo Restrictions pertain
to targets where Dicerna does not have, or does not currently intend to have, a therapeutic program, or are expected to be consistent with Dicerna’s execution
on programs in the normal course of business. The

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Settlement Agreement did not include any admission of liability or wrongdoing by either party or any licenses to any intellectual property from either party.

On April 20, 2018, the Company and Alnylam entered into the Alnylam Share Issuance Agreement, pursuant to which the Company agreed to issue to
Alnylam 983,208 shares in satisfaction of the Company’s obligation under the Settlement Agreement to deliver shares to Alnylam. The 983,208 shares issued
pursuant to the Alnylam Share Issuance Agreement was recorded at fair market value of $10.3 million based on the Company’s closing share price on
April 18, 2018, the date the Settlement Agreement was executed. The Company did not assign any value to the Oligo Restrictions as the Company did not
incur additional losses or give up any value as a result of the restrictions.

In May 2018, the Company recorded the cash obligation of $13.0 million as a liability discounted to the estimated present value of $8.7 million at an effective
interest rate of 10%. The Company applied the effective interest method, as the present value is accreted through maturity. In October 2018, the Company
entered into collaboration agreements with Alexion and Lilly, under which the Company was entitled to upfront cash consideration of $22.0 million and
$100.0 million, respectively (see Note 8). Accordingly, the Company revised its estimate of the present value of the litigation settlement payable from $8.7
million to $13.0 million based on the expected timing of the remaining payments. The impact of revising the expected timing of repayment was recorded as a
$3.7 million charge to litigation expense in the consolidated statement of operations for the year ended December 31, 2018.

In connection with the execution of the Alexion Collaboration Agreement and the related receipt of the non-refundable upfront payment of $22.0 million and
proceeds of $15.0 million from the Alexion Share Issuance Agreement in October 2018, the Company determined that $2.5 million became payable to
Alnylam under the terms of the Settlement Agreement. The Company issued a payment to Alnylam of $2.5 million in November 2018 for the amount of the
litigation settlement payable due in connection with the cash consideration received from Alexion during 2018.

At December 31, 2018, the outstanding balance of the litigation settlement payable was 10.5 million. The Company paid the remaining outstanding balance of
litigation settlement payable in full on January 22, 2019 upon receipt of the upfront cash payment associated with the Lilly Collaboration Agreement. During
the year ended December 31, 2018, the Company recognized interest expense of $0.6 million on the outstanding balance of the litigation settlement payable
during the year.

Total litigation expense was $29.1 million for the year ended December 31, 2018, all of which related to the litigation and settlement agreement with
Alnylam. The litigation expense for the year ended December 31, 2018 includes $24.7 million related to the Settlement Agreement. The Company recorded
expenses related to the Alnylam litigation of $9.0 million during the year ended December 31, 2017.

Legal proceedings

From time to time, the Company may be subject to various claims and legal proceedings in the ordinary course of business. If the potential loss from any
claim, asserted or unasserted, or legal proceeding is considered probable and the amount is reasonably estimable, the Company will accrue a liability for the
estimated loss. There were no contingent liabilities recorded as of December 31, 2019 or 2018.

16.    QUARTERLY FINANCIAL DATA (UNAUDITED)

The following tables contain selected quarterly financial information for the years ended December 31, 2019 and 2018.

Revenue

Net loss

Net loss per share – basic and diluted

Revenue

Net loss

Net loss per share – basic and diluted

$

$

$

$

$

$

FIRST 
QUARTER

SECOND 
QUARTER

THIRD 
QUARTER

FOURTH 
QUARTER

2019

3,107   $

(26,154)   $

(0.38)   $

5,682   $

(23,845)   $

(0.35)   $

2018

8,035   $

(30,790)   $

(0.45)   $

7,080

(39,670)

(0.58)

FIRST 
QUARTER

SECOND 
QUARTER

THIRD 
QUARTER

FOURTH 
QUARTER

1,545   $

(35,644)   $

(0.68)   $

1,545   $

(19,020)   $

(0.35)   $

1,541

(18,610)

(0.29)

1,545   $

(15,579)   $

(0.30)   $

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Net loss per share is based on each reporting period’s weighted‑average number of shares outstanding, which may differ on a quarter-to-quarter basis. As
such, the sum of the quarterly net loss per share calculations may not equal the year-to-date net loss per share calculation.

17.    SUBSEQUENT EVENTS

Leases

Additional Lexington Facility

On January 14, 2020, the Company entered into a non-cancelable real property lease agreement for 61,282 square feet of laboratory and office space in
Lexington, Massachusetts.

The original term is estimated to commence during the fourth quarter of 2020 and is for 125 months with options to extend the term for two additional
successive periods of five years thereafter. The aggregate total fixed rent is approximately $41.8 million with the annual fixed rental payments escalating from
$3.6 million to $4.8 million during the original term. The Company is also obligated to deliver an irrevocable letter of credit or security deposit in the amount
of $1.5 million.

Boulder Facility Expansion

On February 4, 2020, the Company entered into an amendment to a real property lease agreement for our office location in Boulder, Colorado. The
amendment provides for the lease of an additional 6,985 square feet of office space in that same location. In addition, the existing lease was amended to
require an additional letter of credit for $0.1 million, totaling $0.5 million for the first 36 months of the lease and $0.4 million thereafter for the Boulder
facility.

The original term of the lease is estimated to run concurrently with the original lease in this location to commence in the second quarter of 2020 for a period
of 87 months from the commencement date. The Company has the option to extend the term for two additional successive periods of five years thereafter. The
aggregate total fixed rent for the additional space is approximately $1.4 million with the annual fixed rental payments escalating each year but approximating
$0.2 million for each annual period.

In addition to the fixed rent during the lease term, the Company will be responsible for certain customary operating expenses and real estate taxes specified in
the agreement.

Institutional Investment

On February 6, 2020, the Company issued and sold an aggregate of approximately $40.0 million of shares of its common stock to a single institutional
investor pursuant to its common stock Sales Agreement with Cowen and Company, LLC as the sales agent. In this transaction, the Company sold an
aggregate of 2,077,500 shares of common stock at a price of $19.25 per share, resulting in net proceeds of approximately $39.2 million after a deduction of
approximately $0.8 million in sales commissions. The shares in the offering were sold pursuant to a shelf registration statement declared effective by the SEC
on May 31, 2018 and a prospectus supplement filed with the SEC on June 1, 2018.

ITEM 9.

CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None.

ITEM 9A.

CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our periodic and current reports

that we file under the Exchange Act, with the SEC is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and
forms, and that such information is accumulated and communicated to our management, including our chief executive officer and principal financial officer,
as appropriate, to allow timely decisions regarding required disclosure.

As of the end of the period covered by this Annual Report on Form 10-K, we carried out an evaluation, under the supervision and with the participation

of our management, including the chief executive officer and the chief financial officer, of the effectiveness of the design and operation of our disclosure
controls and procedures pursuant to Exchange Act Rule 13a-15. Based upon, and as of the date of, this evaluation, our chief executive officer and our chief
financial officer concluded that our disclosure controls and

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procedures were effective. Accordingly, management believes that the financial statements included in this report fairly present in all material respects our
financial condition, results of operations and cash flows for the periods presented.

Management’s Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting (as defined in Rules 13a-15(f) and

15d-15(f) of the Exchange Act). Under the supervision and with the participation of our management, including our chief executive officer and chief financial
officer, we conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2019 based on the guidelines
established in Internal Control—Integrated Framework 2013 issued by the Committee of Sponsoring Organizations of the Treadway Commission. Our
internal control over financial reporting includes policies and procedures that provide reasonable assurance regarding the reliability of financial reporting and
the preparation of financial statements for external reporting purposes in accordance with U.S. generally accepted accounting principles.

Based on that evaluation, management concluded that our internal control over financial reporting was effective as of December 31, 2019.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any
evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree
of compliance with the policies or procedures may deteriorate.

The Company’s financial statements included in this Annual Report on Form 10-K have been audited by Deloitte & Touche LLP, independent

registered public accounting firm, as indicated in the following report. Deloitte & Touche LLP has also provided an attestation report on the Company’s
internal control over financial reporting.

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of Dicerna Pharmaceuticals, Inc.

Opinion on Internal Control Over Financial Reporting

We have audited the internal control over financial reporting of Dicerna Pharmaceuticals, Inc. and subsidiaries (the “Company”) as of December 31, 2019,
based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway
Commission (COSO). In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31,
2019, based on criteria established in Internal Control – Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated
financial statements as of and for the year ended December 31, 2019, of the Company and our report dated February 27, 2020, expressed an unqualified
opinion on those financial statements.

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Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of
internal control over financial reporting, included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting. Our
responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm
registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the
applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an
understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating
effectiveness of internal control based on the assess risk, and performing such other procedures as we considered necessary in the circumstances. We believe
that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and
the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over
financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect
the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit
preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being
made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or
timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of
effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance
with the policies or procedures may deteriorate.

/s/ Deloitte & Touche LLP

Boston, Massachusetts

February 27, 2020

Changes in Internal Control Over Financial Reporting

We continuously seek to improve the efficiency and effectiveness of our internal controls. This results in refinements to processes throughout the
Company. There was no change in our internal control over financial reporting during the year ended December 31, 2019, which was identified in connection
with our management’s evaluation required by Exchange Act Rules 13a-15(f) and 15d-15(f), that has materially affected, or is reasonably likely to materially
affect, our internal control over financial reporting.

Inherent Limitations on the Effectiveness of Controls

Our management, including the chief executive officer and chief financial officer, does not expect that our disclosure controls and procedures or our
internal control over financial reporting will prevent all error and all fraud. A control system, no matter how well conceived and operated, can provide only
reasonable, not absolute, assurance that the objectives of the control system are met. Because of the inherent limitations in all control systems, no evaluation
of controls can provide absolute assurance that all control issues and instances of fraud, if any, within a company have been detected. These inherent
limitations include the realities that judgments in decision making can be faulty and that breakdowns can occur because of simple error or mistake.
Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people or by management override of the
control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no
assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls may become inadequate because
of changes in conditions, or the degree of compliance with the policies or procedures may

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deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

ITEM 9B.

OTHER INFORMATION

In connection with our annual review of our compensation and employment arrangements with our executives and other members of our leadership
team, we adopted new forms of employment agreements to be entered into with such individuals that we may hire in the future, and amended and/or restated
forms of employment agreements with such individuals currently serving in such capacities, including with Douglas M. Fambrough, III, our chief executive
officer, Bob D. Brown, our chief scientific officer and executive vice president, and John B. Green, our chief financial officer, each of whom was a named
executive officer for 2018. The material terms of such agreements are described in further detail below.

Douglas  M.  Fambrough,  III,  Ph.D.  In  July  2016,  we  entered  into  an  amended  and  restated  employment  agreement  with  Dr.  Fambrough  and  on
February  27,  2020,  we  entered  into  an  amendment  to  the  Fambrough  Agreement  (as  amended,  the  “Fambrough  Agreement”)  providing  for,  among  other
things,  the  clarification  that  acceleration  of  Dr.  Fambrough’s  equity  contained  in  his  existing  agreement  will  apply  to  time-based  stock-based  awards.
Dr.  Fambrough’s  current  annual  base  salary  is  $575,000  and  he  will  be  eligible  to  participate  in  the  Company’s  annual  bonus  program,  with  a  target
opportunity equal to 60% of his base salary. Pursuant to the Fambrough Agreement, Dr. Fambrough’s employment with us is “at-will,” and his employment is
not for a specified term. The Fambrough Agreement also provides that Dr. Fambrough is eligible to participate in our benefit programs made available to our
senior executives generally.

Under the Fambrough Agreement, if Dr. Fambrough’s employment is terminated by us other than for “cause” (as such term is defined in the Fambrough
Agreement), if we terminate his employment due to his “disability” (as such term is defined in the Fambrough Agreement), or by him for “good reason” (as
such  term  is  defined  in  the  Fambrough  Agreement),  Dr.  Fambrough  will  receive  the  following  severance  benefits:  (i)  18  months  of  continued  base  salary
payments; (ii) a pro rata portion of his annual bonus for the year in which the termination occurs, based on actual performance during the entire performance
period;  (iii)  up  to  18  months  of  Company-reimbursed  Consolidated  Omnibus  Budget  Reconciliation  Act  (“COBRA”)  premiums;  and  (iv)  outstanding  and
unvested time-based stock-based awards that were scheduled to vest in the 12-month period following his termination of employment will accelerate in full.

In addition, if we terminate Dr. Fambrough other than for cause, if we terminate his employment due to his “disability” or if Dr. Fambrough terminates
his employment for good reason during the one-year period following a change of control (as defined in the Fambrough Agreement), then Dr. Fambrough will
receive the following severance benefits: (i) a lump sum severance payment equal to 1.5, multiplied by the sum of Dr. Fambrough’s annual base salary and
target annual bonus; (ii) a pro rata portion of Dr. Fambrough’s target bonus for the year in which the termination occurs; (iii) up to 18 months of Company-
reimbursed COBRA premiums; and (iv) outstanding and unvested time-based stock-based awards will accelerate in full. Under the terms of the Fambrough
Agreement, if any payment or other benefit provided to Dr. Fambrough pursuant to the Fambrough Agreement constitutes an “excess parachute payment”
within  the  meaning  of  Section  280G  of  the  Internal  Revenue  Code  of  1986,  as  amended  (the  “Code”),  and  would  be  subject  to  an  excise  tax  imposed  by
Section 4999 of the Code, then the amounts actually paid to Dr. Fambrough will be reduced to the extent that such a reduction would result in Dr. Fambrough
receiving a greater amount than he would have received if the payment had been made in full.

Dr. Fambrough’s right to receive these severance benefits is subject to his providing a release of claims in favor of us. Dr. Fambrough has also entered
into an agreement that includes noncompetition and nonsolicitation covenants in favor of us that apply during Dr. Fambrough’s employment with us and for
two years thereafter.

Bob D. Brown, Ph.D. and John B. Green On February 27, 2020, we entered into amended and restated employment agreements with each of Bob D.
Brown,  our  Chief  Scientific  Officer,  Executive  Vice  President,  and  John  B.  Green,  our  Chief  Financial  Officer,  each  a  named  executive  officer  for  2018
(collectively,  “Employment  Agreements”).  These  amended  and  restated  employment  agreements  provide  for,  among  other  things,  the  clarification  that
acceleration  of  these  executives’  equity  contained  in  their  existing  agreements  will  apply  to  time-based  stock-based  awards.    Per  the  Employment
Agreements, their employment with us is “at-will,” and not for a specified term. Under the Employment Agreements, Mr. Green’s and Dr. Brown’s current
annual  base  salaries  are  $415,800  and  $480,041,  respectively,  and  each  are  eligible  to  participate  in  the  Company’s  annual  bonus  program,  with  a  target
opportunity equal to 40% of base salary. The Employment Agreements also provide that each executive is eligible to participate in our benefit programs made
available to our senior executives generally.

Pursuant  to  the  respective  Employment  Agreements,  if  we  terminate  the  executive  other  than  for  “cause”  (as  defined  in  the  respective  Employment
Agreement),  if  we  terminate  the  executive’s  employment  due  to  the  executive’s  “disability”  (as  defined  in  the  relevant  employment  agreement),  or  if  the
executive  officer  terminates  his  employment  for  “good  reason”  (as  defined  in  the  respective  Employment  Agreement),  then  the  executive  will  receive  the
following severance benefits: (i) 12 months of continued base salary payments; (ii) a pro rata portion of his annual bonus for the year in which the termination
occurs, based on actual performance during the entire performance period; and (iii) up to 12 months of Company-reimbursed COBRA premiums.

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In addition, if we terminate the executive other than for cause, if we terminate the executive’s employment due to the executive’s disability, or if the
executive terminates his employment for good reason during the one-year period following a change of control (as defined in the respective Employment
Agreement), then the executive officer will receive the following severance benefits: (i) a lump sum severance payment equal to the sum of the executive’s
annual base salary and target annual bonus; (ii) a pro rata portion of the executive’s target bonus for the year in which the termination occurs; and (iii) up to
12 months of Company-reimbursed COBRA premiums. Except as otherwise provided for in an award agreement, any outstanding and unvested time-based
stock-based  awards  will  vest  in  full  upon  a  change  in  control  of  the  Company.  Under  the  terms  of  the  Employment  Agreements,  if  any  payment  or  other
benefit provided to the executive pursuant to his Employment Agreement constitutes an “excess parachute payment” within the meaning of Section 280G of
the Code, and would be subject to an excise tax imposed by Section 4999 of the Code, then the amounts actually paid to the executive officer will be reduced
to the extent that such a reduction would result in the executive officer receiving a greater amount than he would have received if the payment had been made
in full.

Each executive’s right to receive the aforementioned severance benefits is subject to him providing a release of claims in favor of us. Each of Mr. Green
and Dr. Brown has also entered into an agreement that includes noncompetition and nonsolicitation covenants in favor of us that apply during each of these
employee’s employment with us and for two years thereafter.

In  addition,  on  February  24,  2020,  Mr.  Green  notified  us  of  his  intention  to  retire  from  his  position  as  chief  financial  officer  of  our  company.  On
February 27, 2020, we entered into a transition agreement (the “Transition Agreement”) with Mr. Green to provide for, among other things, arrangements in
relation to the departure of Mr. Green from our company. The material terms of such agreement are described in further detail below.

Transition agreement. Pursuant to the Transition Agreement, we will continue Mr. Green’s employment as our chief financial officer through the date
of commencement of employment by his successor (the “Transition Period”), for whom we are engaged in a search, as of the date of this Current Report on
Form 8-K. During Transition Period, in which Mr. Green will continue his employment (ending no later than June 30, 2021), Mr. Green will continue to be
paid his current base salary of $415,800 per year and the other terms of his employment agreement  (other than as modified by the Transition Agreement) will
continue in effect. Mr. Green is also entitled to receive a bonus payment, with a target annual bonus of 40% of his base salary, subject to the determination of
the final amount in the sole discretion of our board of directors, as if Mr. Green had remained an employee for the full calendar year 2020, and based on our
corporate  goal  achievements,  as  determined  by  our  board  of  directors.  Such  bonus  payment  is  in  lieu  of  any  bonus  or  incentive  compensation  payments
otherwise  due  to  Mr.  Green  pursuant  to  his  existing  employment  agreement.  At  the  conclusion  of  the  Transition  Period,  Mr.  Green  will  be  entitled  to  the
following severance benefits (in lieu of the severance benefits described in his employment agreement): (i) 12 months of continued base salary payments; and
(ii) up to 12 months of Company-reimbursed COBRA premiums.

Following the Transition Period, we will retain Mr. Green as a consultant until June 30, 2021, or such earlier or later date consistent with the Transition
Agreement (the “Consulting Period”), in order to provide consulting services that may consist of any transitional assistance, any responsibilities of a chief
financial officer or any other responsibilities that we may reasonably request. Mr. Green’s services during the Consulting Period will constitute a continued
service relationship with us and, as a result, his equity awards will continue to vest until the end of the Consulting Period, following which, Mr. Green will
have three months to exercise any vested awards pursuant to the terms of such awards (but no later than the expiration date of the awards). In the event that
we enter into a term sheet or letter of intent or similar agreement with a potential acquirer contemplating a change of control, then upon the consummation of
the change of control, all time-based equity awards held by Mr. Green will immediately accelerate and become fully exercisable or non-forfeitable upon the
consummation of the change of control.

The foregoing description of the terms of the employment agreements and the transition agreement does not purport to be complete and is qualified in

its entirety by reference to the full text of such agreements, copies of which are filed as exhibits to this Annual Report on Form 10-K.

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PART III

ITEM 10.

DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

The information required by this item and not set forth below will be set forth in the definitive proxy statement (the “Proxy Statement”) for our 2020
Annual Meeting of Stockholders to be filed with the SEC pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this
Annual Report on Form 10-K, and is incorporated herein by reference.

Information regarding our audit committee financial expert will be set forth in the Proxy Statement and is incorporated herein by reference.

We have adopted a Code of Business Conduct and Ethics applicable to all employees, including the principal executive officer, principal financial

officer, and principal accounting officer, or persons performing similar functions. The Code of Business Conduct and Ethics is posted on our website at
www.dicerna.com. Amendments to, and waivers from, the Code of Business Conduct and Ethics that apply to any of these officers, or persons performing
similar functions, and that relate to any element of the code of ethics definition enumerated in Item 406(b) of Regulation S-K will be disclosed at the website
address provided above and, to the extent required by applicable regulations, on a Current Report on Form 8-K.

ITEM 11.

EXECUTIVE COMPENSATION

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by reference.

ITEM 12.

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER
MATTERS

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by reference.

ITEM 13.

CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by reference.

ITEM 14.

PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information required by this item will be set forth in the Proxy Statement and is incorporated herein by reference.

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Table of Contents

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(1) Consolidated Financial Statements:

PART IV

The following consolidated financial statements are filed as part of this Annual Report on Form 10-K under Item 8 – “Financial Statements and

Supplementary Data.”

Report of Independent Registered Public Accounting Firm

Consolidated Balance Sheets

Consolidated Statements of Operations

Consolidated Statements of Changes in Redeemable Convertible Preferred Stock and Stockholders’ Equity

Consolidated Statements of Cash Flows

Notes to Consolidated Financial Statements

(2)

Financial Statement Schedules.

Page
83

85

86

87

89

91

All schedules are omitted because they are not applicable, not required, or because the required information is included in the consolidated financial

statements or notes thereto.

(3)

Exhibits.

EXHIBIT INDEX

Incorporated by Reference

Exhibit
Number

3.1

3.2

3.3

3.4

4.1*

4.2

4.2A

4.3

4.4

4.5

4.5A

10.1+

10.2+

10.3+

10.4+

10.5+

10.6+

10.7+

10.8+

10.9+

10.10+

10.11+

10.12

Description of
Documents

  Amended and Restated Certificate of Incorporation of the Company.
  Amended and Restated Bylaws of the Company.
  Certificate of Designation of Redeemable Convertible Preferred Stock.

Certificate of Elimination of the Redeemable Convertible Preferred Stock, dated as of
December 29, 2017.
Description of Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934, as
amended.

  Specimen Common Stock Certificate.
  Form of Redeemable Convertible Preferred Stock Certificate.
  Form of Warrant to Purchase Common Stock.
  Form of Warrant to Purchase Preferred Stock.
  Form of Amended and Restated Registration Rights Agreement.
  Form of First Amendment to Registration Rights Agreement.
  2007 Employee, Director and Consultant Stock Plan, as amended (the “2007 Plan”).
  Form of Restricted Stock Agreement under the 2007 Plan.
  Form of Incentive Stock Option Agreement under the 2007 Plan.
  Form of Non-Qualified Stock Option Agreement under the 2007 Plan.
  2010 Employee, Director and Consultant Equity Incentive Plan, as amended (the “2010 Plan”).
  Form of Stock Option Grant Notice and Stock Option Agreement under the 2010 Plan.
  Form of Restricted Stock Agreement under the 2010 Plan.
  2014 Employee Stock Purchase Plan.
  Form of Indemnification Agreement by and between the Company and each of its directors.
  Letter agreement dated as of June 2, 2009, by and between the Company and David M. Madden.

Letter agreement dated as of February 28, 2011, by and between the Company and Dennis H. Langer
M.D., J.D.

Form   File Number
001-36281
8-K

8-K

8-K

8-K

S-1

8-K

S-1

S-1

8-K

8-K

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

S-1

001-36281

001-36281

001-36281

333-193150

001-36281

333-193150

333-193150

001-36281

001-36281

333-193150

333-193150

333-193150

333-193150

333-193150

333-193150

333-193150

333-193150

333-193150

333-193150

333-193150

  Lease agreement dated as of July 11, 2014, by and between the Company and King 87 CPD LLC.

10-Q

001-36281

Exhibit

Filing Date

3.1

3.2

3.1

3.1

4.1

4.1

4.2

4.3

10.2

10.1

10.1

10.2

10.3

10.4

10.5

10.6

10.7

10.9

10.10

10.14

10.15

10.5

February 5, 2014

February 5, 2014

March 30, 2017

December 29, 2017

January 28, 2014

March 30, 2017

  December 31, 2013
  December 31, 2013

March 30, 2017

  December 18, 2017
  December 31, 2013
  December 31, 2013
  December 31, 2013
  December 31, 2013
  December 31, 2013
  December 31, 2013
  December 31, 2013
January 28, 2014

January 28, 2014

  December 31, 2013
December 31, 2013

November 6, 2014

127

 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number

10.13+

10.14

10.15+

10.16+

10.17+

10.18+

10.19+

10.20+

10.21+

10.22+

10.23+

10.24+

10.25+

10.26+

10.27+

10.28+

10.29*+

10.30*+

10.31*+

10.32*+

10.33*+

10.34

10.35

10.36+

10.37

10.38

10.39†

10.40

10.41†

10.42

10.43†

10.44

10.45†

Description of
Documents

  Letter Agreement dated as of September 12, 2014, by and between the Company and Bruce Peacock.
  Sales Agreement, dated as of March 12, 2015, between the Registrant and Cowen and Company, LLC.
  Amended and Restated 2014 Performance Incentive Plan, as amended and restated on May 7, 2019.
Form of Incentive Stock Option Agreement under the Amended and Restated 2014 Performance
Incentive Plan.
Form of Non-Qualified Stock Option Agreement under the Amended and Restated 2014 Performance
Incentive Plan.
Form of Restricted Stock Unit Award Agreement under the Amended and Restated 2014 Performance
Incentive Plan.
Form of Restricted Stock Unit Grant Notice under the Amended and Restated 2014 Performance
Incentive Plan.
Separation Agreement dated as of December 15, 2015 by and between the Company and James E.
Dentzer.

  Offer Letter dated as of January 14, 2016 by and between the Company and John “Jack” Green.
  Dicerna Pharmaceuticals, Inc. 2016 Inducement Plan, as amended.
  Form of Dicerna Pharmaceuticals, Inc. Non-Qualified Inducement Stock Option Agreement.
  Form of Non-Plan Inducement Stock Option Agreement.

Amended and Restated Employment Agreement dated as of July 8, 2016 by and between the Company
and Douglas M. Fambrough, III.
Amended and Restated Employment Agreement dated as of July 8, 2016 by and between the Company
and Bob. D. Brown.
Amended and Restated Employment Agreement dated as of July 6, 2016 by and between the Company
and James B. Weissman.
Amended and Restated Employment Agreement dated as of November 4, 2016 by and between the
Company and John B. Green.
Amended and Restated Employment Agreement dated as of February 25, 2020 by and between the
Company and John B. Green.
Amended and Restated Employment Agreement dated as of February 24, 2020 by and between the
Company and James B. Weissman.
Amended and Restated Employment Agreement dated as of February 21, 2020 by and between the
Company and Bob. D. Brown.
Amended and Restated Employment Agreement dated as of February 21, 2020 by and between the
Company and Douglas M. Fambrough, III.
Amended and Restated Employment Agreement dated as of February 26, 2020 by and between the
Company and Ralf Rosskamp.

  Form of Letter Agreement by and between the Company and Adam Koppel.

Form of Redeemable Convertible Preferred Stock Purchase Agreement by and among the Company
and seven institutional investors led by funds advised by Bain Capital Life Sciences L.P.

  Employment Agreement, dated May 18, 2017, by and between the Company and Ralf Rosskamp.

Collaborative Research and License Agreement, dated October 27, 2017, by and between the Company
and Boehringer Ingelheim International GmbH.
Letter Agreement entered into on December 13, 2017 by and between the Company and the holders of
its redeemable convertible preferred stock.
Confidential Settlement Agreement and General Release, dated April 18, 2018, between the Company
and Alnylam Pharmaceuticals, Inc.
Share Issuance Agreement, dated April 20, 2018, between the Company and Alnylam Pharmaceuticals,
Inc.
Collaborative Research and License Agreement, dated October 22, 2018, by and between the Company
and Alexion Pharma Holding Unlimited Company.
Alexion Share Issuance Agreement, dated October 22, 2018, by and between the Company and Alexion
Pharma Holding Unlimited Company.
Collaboration and License Agreement, dated October 25, 2018, by and between the Company and Eli
Lilly and Company.
Lilly Share Issuance Agreement, dated October 25, 2018, by and between the Company and Eli Lilly
and Company.
Additional Target Agreement, dated December 31, 2018, by and between the Company and Boehringer
Ingelheim International GmbH.

128

Incorporated by Reference

Form   File Number
001-36281
10-K

Exhibit

10.26

S-3

10-Q

10-K

10-K

8-K

8-K

10-K

10-K

S-8

S-8

S-8

10-Q

10-Q

10-Q

10-Q

8-K

8-K

10-Q

10-K

8-K

10-Q

10-Q

10-K

10-K

10-K

10-K

10-K

333-202687

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

333-223648

333-210071

333-210071

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

001-36281

1.2

10.2

10.31

10.32

10.1

10.2

10.33

10.34

4.3

4.2

4.4

10.1

10.2

10.3

10.4

10.3

10.1

10.3

10.30

10.1

10.1

10.2

10.34

10.35

10.36

10.37

10.38

Filing Date

March 12, 2015

March 12, 2015

May 10, 2019

March 10, 2016

March 10, 2016

January 13, 2020

January 13, 2020

March 10, 2016

March 10, 2016

March 14, 2018

March 10, 2016

March 10, 2016

November 7, 2016

November 7, 2016

November 7, 2016

November 7, 2016

March 30, 2017

March 30, 2017

August 10, 2017

March 8, 2018

December 14, 2017

August 8, 2018

August 8, 2018

March 13, 2019

March 13, 2019

March 13, 2019

March 13, 2019

March 13, 2019

 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number

10.46*††

10.47*††

10.48*

10.49

10.50

10.51

10.52*

Description of
Documents

Incorporated by Reference

Form   File Number

Exhibit

Filing Date

Collaboration and License Agreement, dated October 30, 2019, by and between the Company, F.
Hoffman-La Roche Ltd and Hoffman-La Roche Inc.
Collaboration and License Agreement, dated November 15, 2019, by and between the Company and
Novo Nordisk A/S.
Share Issuance Agreement, dated November 15, 2019, by and between the Company and Novo Nordisk
A/S.

  Lease Agreement between the Company and Hayden Office Trust, dated as of January 2, 2019.

First Amendment to Lease Agreement between the Company and Hayden Office Trust, dated as of
March 6, 2019.
Lease Agreement between the Company and Western Office Portfolio Property Owner LLC, dated as of
August 26, 2019.
First Amendment to Lease Agreement between the Company and Western Office Portfolio Property
Owner LLC, dated as of February 4, 2020.

10-Q

10-Q

10-Q

001-36281

001-36281

10.1

10.1.1

May 10, 2019

May 10, 2019

001-36281

10.1

November 11, 2019

10.53*

  Lease Agreement between the Company and HCP/King 75 Hayden LLC, dated as of January 14, 2020.

10.54*+

10.55*+

10.56*+

21.1*

23.1*

24

31.1*

Employment Agreement dated as of June 19, 2019, by and between the Company and Robert
Ciappenelli.
Amended and Restated Employment Agreement dated as of February 21, 2020, by and between the
Company and Robert Ciappenelli.

  Transition Agreement dated as of February 27, 2020, by and between the Company and John B. Green.
  Subsidiaries of the Company.
  Consent of Independent Registered Accounting Firm.
  Power of Attorney (reference is made to the signature page).

Certification of the Company’s principal executive officer required by Rule 13a-14(a) or Rule 15d-
14(a).

31.2*

32.1**

101.INS*

  Certification of the Company’s principal financial officer required by Rule 13a-14(a) or Rule 15d-14(a).    
  Section 1350 Certifications.
  XBRL Report Instance Document
101.SCH*   XBRL Taxonomy Extension Schema Document
101.CAL*   XBRL Taxonomy Calculation Linkbase Document
101.LAB*   XBRL Taxonomy Label Linkbase Document
101.PRE*   XBRL Taxonomy Presentation Linkbase Document
101.DEF*   XBRL Taxonomy Extension Definition Linkbase Document

†

††
+
*
**

Confidential treatment with respect to specific portions of this Exhibit has been requested, and such portions are omitted and have been filed separately with the Securities and Exchange
Commission.
Portions of this exhibit (indicated by asterisks) have been omitted in accordance with the rules of the Securities and Exchange Commission.
Management contract or compensatory plan or arrangement.
Filed herewith.
Exhibit 32.1 is being furnished and shall not be deemed to be “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, nor shall such exhibit
be deemed to be incorporated by reference in any registration statement or other document filed under the Securities Act, or the Exchange Act, except as otherwise stated in such filing.

ITEM 16.

FORM 10-K SUMMARY

None.

129

 
   
 
 
 
 
 
 
   
   
   
   
 
   
   
   
   
 
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
 
   
   
   
   
 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
Table of Contents

Pursuant to the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto

duly authorized, in Lexington, Commonwealth of Massachusetts on February 27, 2020.

SIGNATURES

By:

/s/ Douglas M. Fambrough, III

Douglas M. Fambrough, III, Ph.D.
Chief Executive Officer and Director
(Principal Executive Officer)

By:

/s/ John B. Green

John B. Green
Chief Financial Officer (Principal
Financial Officer and Principal Accounting
Officer)

130

 
 
Table of Contents

POWER OF ATTORNEY

KNOW ALL PERSON BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints Douglas M. Fambrough, III,

Ph.D. and John B. Green and each of them, as his true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him and
in his name, place and stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K and to file the same, with all
exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents
and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully
to all intents and purposes as he might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or their
or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed by the following persons in the capacities

and on the dates indicated:

Signature

Title

Date

/s/ Douglas M. Fambrough, III

Douglas M. Fambrough, III, Ph.D.

Chief Executive Officer and Director
(Principal Executive Officer)

/s/ John B. Green

John B. Green

/s/ J. Kevin Buchi

J. Kevin Buchi

/s/ Stephen Doberstein

Stephen Doberstein, Ph.D.

/s/ Martin Freed

Martin Freed, M.D.

/s/ Patrick Gray

Patrick Gray

Chief Financial Officer
(Principal Financial Officer and
Principal Accounting Officer)

Chairman

Director

Director

Director

February 27, 2020

February 27, 2020

February 27, 2020

February 27, 2020

February 27, 2020

February 27, 2020

/s/ Stephen J. Hoffman

Director

February 27, 2020

Stephen J. Hoffman, MD., Ph.D.

/s/ Adam M. Koppel

Director

February 27, 2020

Adam M. Koppel, M.D., Ph.D.

/s/ Marc Kozin

Marc Kozin

/s/ Anna Protopapas

Anna Protopapas

/s/ Cynthia Smith

Cynthia Smith

Director

Director

Director

131

February 27, 2020

February 27, 2020

February 27, 2020

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Description of the Registrant’s Securities Registered Pursuant to 
Section 12 of the Securities Exchange Act of 1934, as amended

Exhibit 4.1

The summary of the general terms and provisions of the registered securities of Dicerna Pharmaceuticals, Inc. (“Dicerna,” “we,” or “our”) set
forth  below  does  not  purport  to  be  complete  and  is  subject  to  and  qualified  in  its  entirety  by  reference  to  our  Restated  Certificate  of
Incorporation, as amended (our “certificate of incorporation”) and our Amended and Restated By-laws (our “by-laws” and, together with our
certificate  of  incorporation,  our  “Charter  Documents”),  each  of  which  is  incorporated  by  reference  as  an  exhibit  to  our  most  recent  Annual
Report  on  Form  10-K  filed  with  the  Securities  and  Exchange  Commission.  We  encourage  you  to  read  our  Charter  Documents  and  the
applicable provisions of the General Corporation Law of the State of Delaware (the “DGCL”) for additional information.

General

Our authorized capital stock consists of 150,000,000 shares of common stock, par value $0.0001 per share, and 5,000,000 shares of preferred
stock, par value $0.0001 per share.

Common Stock

Dividends

Holders  of  our  common  stock  are  entitled  to  receive  dividends  ratably,  if  any,  as  may  be  declared  by  our  board  of  directors  out  of  legally
available funds, subject to any preferential dividend rights of any preferred stock then outstanding.

Voting

Holders of our common stock are entitled to one vote for each share of common stock held of record for the election of directors and on all
matters submitted to a vote of stockholders. In the election of directors, a majority of the votes cast at a meeting of stockholders is sufficient to
elect a director, except that if the number of nominees exceeds the number of directors to be elected, then a plurality of the votes cast at a
meeting of stockholders is sufficient to elect a director. Our stockholders do not have cumulative voting rights in the election of directors.
Accordingly, holders of a majority of the voting shares are able to elect all of the directors.

With the exception of certain anti-takeover provisions as detailed in Delaware Law and Our Charter Documents, a majority vote of common
stockholders is generally required to take action under our certificate of incorporation and bylaws.

Other Rights

Upon our dissolution, liquidation or winding up, holders of our common stock are entitled to share ratably in our net assets legally available
after the payment of all our debts and other liabilities, subject to the preferential rights of any preferred stock then outstanding. Holders of our
common stock have no preemptive, subscription or conversion rights, and there are no redemption or sinking fund provisions applicable to our
common stock. There are no restrictions on the alienability of common stock. We may issue additional shares of common stock, if authorized
by our board of directors, without the common stockholders’ approval, unless required by Delaware law or the stock exchange on which our
securities are traded. The issuance of additional shares could have the effect of diluting any earnings per share and the book value per share of
outstanding  shares  of  common  stock.  If  we  receive  the  appropriate  payment,  shares  of  common  stock  that  we  issue  will  be  fully  paid  and
nonassessable.

Preferred Stock

Our board of directors has the authority, without further action by our stockholders, to designate and issue up to 5,000,000 shares of preferred
stock in one or more series. Our board of directors may also designate the rights, preferences and privileges of the holders of each such series of
preferred stock, any or all of which may be greater than or senior to those granted to the holders of common stock. Though the actual effect of
any such issuance on the rights of the holders of common stock will not be known until such time as our board of directors determines the
specific rights of the holders of preferred stock, the potential effects of such an issuance include:

•

•

•

•

diluting the voting power of the holders of common stock;

reducing the likelihood that holders of common stock will receive dividend payments;

reducing the likelihood that holders of common stock will receive payments in the event of our liquidation, dissolution, or winding up;
and

delaying, deterring or preventing a change in control or other corporate takeover.

No  shares  of  preferred  stock  are  outstanding  as  of  the  date  of  our  Annual  Report  on  Form  10-K  with  which  this  Exhibit  4.1  is  filed  as  an
exhibit.

Anti-Takeover Effects of Delaware Law and Provisions of our Charter Documents

Certain provisions of the DGCL and our Charter Documents contain provisions that could have the effect of delaying, deferring or discouraging
another party from acquiring control of us. These provisions, which are summarized below, are expected to discourage certain types of coercive
takeover practices and inadequate takeover bids. These provisions are also designed in part to encourage anyone seeking to acquire control of
us to first negotiate with our board of directors. We believe that the advantages gained by protecting our ability to negotiate with any
unsolicited and potentially unfriendly acquirer outweigh the disadvantages of discouraging such proposals, including those priced above the
then-current market value of our common stock, because, among other reasons, the negotiation of such proposals could improve their terms.

Charter Document Provisions

Our Charter Documents include a number of provisions that could deter hostile takeovers or delay or prevent changes in control of our board of
directors or management team, including the following:

•

•

•

•

•

•

the ability of our Board to increase or decrease the size of the Board without stockholder approval;

advance notice requirements for the nomination of candidates for election to our Board and for proposals to be brought before our
annual meeting of stockholders;

authorization of our Board to designate the terms of and issue new series of preferred stock without stockholder approval;

non-cumulative voting for directors;

establish that our board of directors is divided into three classes—Class I, Class II and Class III—with each class serving staggered
terms; and

limitations on the ability of our stockholders to call special meetings of stockholders.

Delaware Anti-Takeover Statute

We are subject to the provisions of Section 203 of the DGCL regulating corporate takeovers. In general, Section 203 prohibits a publicly held
Delaware  corporation  from  engaging,  under  certain  circumstances,  in  a  business  combination  with  an  interested  stockholder  for  a  period  of
three years following the date the person became an interested stockholder unless:

•

•

•

prior to the date of the transaction, the board of directors of the corporation approved either the business combination or the transaction
which resulted in the stockholder becoming an interested stockholder;

upon  completion  of  the  transaction  that  resulted  in  the  stockholder  becoming  an  interested  stockholder,  the  interested  stockholder
owned at least 85% of the voting stock of the corporation outstanding at the time the transaction commenced, excluding for purposes of
determining the voting stock outstanding, but not for determining the outstanding voting stock owned by the interested stockholder, (1)
shares  owned  by  persons  who  are  directors  and  also  officers  and  (2)  shares  owned  by  employee  stock  plans  in  which  employee
participants do not have the right to determine confidentially whether shares held subject to the plan will be tendered in a tender or
exchange offer; or

at or subsequent to the date of the transaction, the business combination is approved by the board of directors of the corporation and
authorized at an annual or special meeting of stockholders, and not by written consent, by the affirmative vote of at least 66 2/3% of the
outstanding voting stock which is not owned by the interested stockholder.

Generally, a business combination includes a merger, asset or stock sale, or other transaction resulting in a financial benefit to the interested
stockholder.  An  interested  stockholder  is  a  person  who,  together  with  affiliates  and  associates,  owns  or,  within  three  years  prior  to  the
determination of interested stockholder status, did own 15% or more of a corporation’s outstanding voting stock. We expect the existence of
this provision to have an anti-takeover effect with respect to transactions our board of directors does not approve in advance. We also anticipate
that Section 203 of the DGCL may discourage business combinations or other attempts that might result in a premium over the market price for
the shares of common stock held by our stockholders.

The provisions of Delaware law and our Charter Documents could have the effect of discouraging others from attempting hostile takeovers and,
as a consequence, may also inhibit temporary fluctuations in the market price of

our common stock that often result from actual or rumored hostile takeover attempts. These provisions may also have the effect of preventing
changes in our management. It is possible that these provisions could make it more difficult to accomplish transactions that stockholders may
otherwise deem to be in their best interests.

Exhibit 10.29

EMPLOYMENT AGREEMENT (Revised)

EMPLOYMENT AGREEMENT (“Agreement”) made this February 21, 2020 (the “Effective Date”) between Dicerna Pharmaceuticals, Inc., a

Delaware corporation (“Company”), on the one hand and John Green (the “Executive”) on the other hand.

WHEREAS, the Company desires to employ the Executive and the Executive desires to be employed by the Company, on terms set forth herein;

NOW, THEREFORE, in consideration of the mutual agreements set forth herein, the parties agree as follows:

1. Term of Employment. The Executive’s employment under this Agreement shall commence on the Effective Date and shall end on such date as the
Executive’s employment terminates in accordance with Section 4 of this Agreement. Subject to the balance of this Agreement, the Executive shall be an at-
will employee of the Company whose employment may be terminated (by the Company or by the Executive) at any time, for any or no reason, in which
case the Executive will be entitled to the separation benefits set forth in Section 4, below.

2. Duties. During his employment with the Company, the Executive shall have the title of Chief Financial Officer. The Executive shall devote his full

business time and effort to the performance of his duties for the Company, which he shall perform faithfully and to the best of his ability. The Executive
shall have all of the customary powers and duties associated with his position and shall be subject to the Company’s policies, procedures, and approval
practices, as generally in effect from time to time for all senior executives of the Company and the direction and oversight of the Board. The Executive will
report directly to the Chief Executive Officer of the Company.

3. Compensation and Related Matters.

a.    Base Salary. The Company shall pay the Executive base salary at a rate of $17,708 paid twice monthly (which annualizes to $425,000), less

withholdings and deductions required and/or permitted by law. The Executive’s base salary shall be paid in conformity with the Company’s payroll practices
generally applicable to the Company’s senior executives.

b.    Annual Bonus.

The Executive shall be eligible to be considered for an Annual Bonus upon achieving of certain pre-determined performance targets consistent with any
Incentive Compensation Plan established by the Compensation Committee (the “Committee”). The Annual Bonus shall be based, in part, on the Executive’s
performance. The grant of such a bonus shall be in the sole discretion of the Committee. The maximum bonus amount for which the Executive will be
eligible is forty percent (40%)of base salary earned for the calendar year, provided that, the Annual Bonus for the first year of employment shall be prorated
based on the date of hire. The Annual Bonus will be earned only after it has been granted by the Committee. The Annual Bonus shall be paid to the
Executive following the close of the fiscal year to which it relates, in no event later than March 15th of the calendar year immediately following the calendar
year in which it was earned. The Executive must be actively employed by the Company at the time the Committee considers granting of bonuses to be
eligible to receive such bonus.

c.    Equity Compensation. Subject to approval of the Board or an appropriate committee thereof, Executive shall be eligible for equity
compensation awards, in such amounts and subject to such terms as shall be commensurate with awards granted to other senior executives of the Company.

d. Benefits. During his employment with the Company, the Executive shall be entitled to participate in all

employee benefit plans and programs, including paid sick leave and holidays, life insurance, disability, medical, dental, and retirement savings plans, to the
same extent generally available to senior executives of the Company, in accordance with the terms of those plans and programs. The Executive shall be
permitted up to four weeks of paid vacation per year, which will accrue on a monthly basis. The Executive will not be allowed to accumulate more than
three weeks of unused vacation days at any given time. The Executive may carry over a maximum of ten unused vacation days from one calendar year to the
next.

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e.    Expenses. The Company agrees to reimburse the Executive for reasonable out-of-pocket expenses incurred in connection with Company
business and within standards to be established by the Board from time to time, including, without limitation, travel and accommodations for authorized
business trips, provided vouchers therefor, or other supporting information as the Company may reasonably require, are presented to the Company. All
reimbursements provided under this Agreement shall be made or provided in accordance with the requirements of Section 409A of the Internal Revenue
Code of 1986, as amended (the “Code”) and the rules and regulations thereunder (“Section 409A”) including, where applicable, the requirement that (i) any
reimbursement is for expenses incurred during the Executive’s lifetime (or during a shorter period of time specified in this Agreement); (ii) the amount of
expenses eligible for reimbursement during a calendar year may not affect the expenses eligible for reimbursement in any other calendar year; (iii) the
reimbursement of an eligible expense shall be made no later than the last day of the calendar year following the year in which the expense is incurred; and
(iv) the right to reimbursement or in kind benefits is not subject to liquidation or exchange for another benefit.

4. Termination

a.    Rights and Duties. The Executive is an employee “at will.” Accordingly, the Company or the Executive may terminate his employment, at

any time with or without cause, for any lawful reason, or no reason. The Executive and the Company agree that, without modifying or altering the
Executive’s “at will” status, each will provide the other with at least thirty (30) days’ prior written notice of termination of the Executive’s employment with
the Company. If the Executive gives notice of termination, except in the case of a termination by the Executive for “Good Reason” as set forth below, such
notice will be deemed a voluntary resignation by the Executive and the Company, in its sole discretion, may elect to relieve the Executive of any obligation
to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s employment, without changing
the status of such termination as a voluntary resignation by the Executive. Should the Company in the event of a voluntary resignation decide to relieve the
Executive of any obligation to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s
employment, it shall nonetheless continue his compensation and benefits for the term of the notice period, except that no bonus shall be earned or awarded
during and after the notice period.

b.    Termination for “Good Reason.” The Executive may terminate his employment at any time for “Good Reason.” “Good Reason” shall

comport with the requirements of Regulation §1.409A-l(n)(2)(ii) and shall mean:

i. A material diminution in the Executive’s authority, duties, responsibilities or reporting responsibilities;

ii.    A material diminution by the Company of the Executive’s annual base compensation then in effect, except a material diminution

generally affecting the members of the Company’s management;

iii.    Any action or inaction by the Company that constitutes a material breach by the Company of the terms of this Agreement; or

iv.    A requirement that the Executive be based more than 50 miles from the offices at which he was principally employed immediately prior

to the date of termination.

The parties acknowledge and agree that “Good Reason” shall not be deemed to have occurred unless: (1) the Executive provides the Company with
written notice that he intends to terminate his employment hereunder for one of the Good Reason grounds set forth in Section 4.b. within sixty (60) days of
the initial occurrence of such ground, with such notice containing a description of such ground, (2) if such Good Reason ground is capable of being cured,
the Company has failed to cure such ground within a period of thirty (30) days from the date of such written notice, and (3) the Executive terminates his
employment within ninety-one (91) days from the date that such Good Reason ground first occurs. For purposes of clarification, the above-listed conditions
shall apply separately to each occurrence of a Good Reason ground, and failure to adhere to such conditions in the event of the occurrence of grounds that
would otherwise have constituted Good Reason had the conditions herein been satisfied shall not disqualify the Executive from asserting and satisfying the
conditions for Good Reason for any subsequent occurrence that may constitute Good Reason.

c.    Termination by the Company for Cause. The Company may terminate the Executive’s employment at any time for “Cause.” “Cause” shall

mean:

i.    The Executive’s commission of an act of fraud, dishonesty, breach of fiduciary duty or misappropriation which may or does adversely

affect the Company;

2

ii.    The Executive’s conviction or plea of guilty or nolo contendere to or engaging in any felony or crime involving moral turpitude, fraud,
misrepresentation or other crime and/or indictment for a crime that, in the reasonable opinion of the Company, affects the Executive’s ability to
perform the duties set forth in this Agreement and/or reflects negatively upon the Company;

iii.    Unauthorized disclosure by the Executive of the Company’s Proprietary Information, as defined in the Nondisclosure Agreement (as

defined in Section 5 below), which results or could have been reasonably foreseen to result, in a material financial loss to the Company;

iv.    The Executive’s material breach of this Agreement or the Nondisclosure Agreement; provided, that if such breach is reasonably possible

of being cured in the opinion of the Company, then the Executive will be given thirty (30) days after written notice from the Company of such
breach to cure; or

v.    The Executive’s failure (which shall not include any Disability as defined below) or refusal to perform the duties and responsibilities of

his employment and/or to follow the policies and procedures of the Company, including without limitation the failure or refusal to carry out lawful
instructions from the Board. If such failure or refusal is reasonably possible of being cured in the opinion of the Company, then the Executive will
be given thirty (30) days after written notice from the Company of such failure or refusal to cure.

d.    Termination in the Event of Death or Disability. The Agreement shall terminate upon the Executive’s death or Disability, and the
Executive’s employment with the Company shall thereupon terminate. For purposes of the Agreement, “Disability” is defined as any illness, injury, accident
or condition of either a physical or psychological nature as a result of which the Executive is unable to perform the essential functions of his duties and
responsibilities hereunder for 90 days during any period of 365 consecutive calendar days or for any consecutive 90-day period.

e. Effect of Termination.

i.    If the Executive is terminated by the Company for Cause, or by the Executive voluntarily other than for Good Reason, then the Executive

will only be entitled to payment when due of any unpaid base salary, expense reimbursements, and vacation days accrued but unused prior to
termination of employment.

ii.    If the Executive’s employment is terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability,

or by the Executive for Good Reason (each of which will be deemed an involuntary termination), then the Executive will be entitled to payment
when due of any unpaid base salary, expense reimbursements, and vacation days accrued prior to termination of employment and, in exchange for
the Executive’s execution of a separation agreement and general release provided by the Company (including, at the Company’s option, a non-
competition obligation during any salary continuation period and (at the Company’s option) a revocation period of seven (7) business days) and
expressly subject to the conditions described in Section 4.e.vi. below, the following:

a)    Continuation of the Executive’s base salary at the rate in effect as of the day immediately preceding his date of termination for a
twelve (12) month period, payable in accordance with the Company’s regular payroll practices, less applicable withholdings, commencing at
the conclusion of the Review Period (as described below), provided that the first installment of such payments shall include all amounts
which would have been paid during the period between the Executive’s date of termination and the date of such first installment;

b)    Payment of a pro-rata portion of the actual amount of the Executive’s Annual Bonus based on actual performance determined

under the terms of the Company’s annual bonus program as then in effect, with such pro-rata portion calculated by multiplying the actual
amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the number of days worked
by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three hundred sixty five (365), with such
payment to be made after the determination of the bonus funding level (but in no event later than March 15 of the calendar year following
the year in which the Executive’s termination occurs); and

c)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) twelve (12) months or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for

3

premium payments for continuation of such group health insurance coverage pursuant to the terms and conditions of COBRA.

iii.    If the Agreement is terminated because of the Executive’s death, the Company shall pay to the estate of the Executive the salary and

benefits which would otherwise have been payable to the Executive up to the date of termination of his employment because of death.

iv.    In the event of a Change of Control (as defined below) occurs and, if within one (1) year thereafter, the Executive’s employment is
terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability, or by the Executive for Good Reason (each
of which will be deemed an involuntary termination), then the Executive will be entitled to payment when due of any unpaid base salary, expense
reimbursements, and vacation days accrued prior to termination of employment and, in exchange for the Executive’s execution of a separation
agreement and general release provided by the Company (including, at the Company’s option, a non-competition obligation during any salary
continuation period and (at the Company’s option) a revocation period of seven (7) business days) and expressly subject to the conditions
described in Section 4.e.vi. below, the following:

a)    A lump sum payment equal to the sum of (i) one (1) year of the Executive’s base salary at the rate in effect as of the day
immediately preceding his date of termination, less applicable withholdings, plus (ii) the Executive’s target annual bonus for the year in
which the termination occurs, less applicable withholdings, payable at the conclusion of the Review Period (as described below);

b)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) one (1) year or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for premium payments for continuation of
such group health insurance coverage pursuant to the terms and conditions of COBRA; and

c)    Payment of a pro-rata portion of the target amount of the Executive’s annual bonus, with such pro-rata portion calculated by
multiplying the target amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the
number of days worked by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three hundred sixty
five (365), with such payment to be made at the conclusion of the Review Period (but in no event later than March 15 of the calendar year
following the year in which the Executive’s termination occurs).

v.     In addition, in the event of a Change of Control, notwithstanding anything to the contrary in any applicable option agreement or stock-
based award agreement, all time-based stock options and other time-based stock-based awards held by the Executive, to the extent unvested as of
immediately prior to the Change of Control shall immediately accelerate and become fully exercisable or nonforfeitable immediately prior to the
consummation of the Change of Control.

For purposes of this Agreement, “Change of Control” means (A) the occurrence of a merger or consolidation of the Company whether or not

approved by the Board, other than (i) a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior
thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity or the parent of such
corporation) at least 50% of the total voting power represented by the voting securities of the Company or such surviving entity or parent of such
corporation outstanding immediately after such merger or consolidation, or (ii) a merger or consolidation which is in effect a financing transaction for the
Company, including, but not limited to, a reverse merger of the Company into a publicly traded “shell” company, or (B) the stockholders of the Company
approve an agreement for the sale or disposition by the Company of all or substantially all of the Company’s assets, provided that, in any case, “Change of
Control” shall be in accordance with Regulation §1.409A-3(i)(5).

vi.    Payment of the severance pay and benefits described in Section 4.e.ii. or 4.e.iv., as applicable, is expressly conditioned on the

Executive’s execution without revocation of the separation agreement and general release described therein, within the time period prescribed in
the separation agreement and general release (which release shall include, at the Company’s option, a non-competition obligation during any salary

4

continuation period and (at the Company’s option) a revocation period of seven (7) business days), and will commence immediately following a
sixty (60) day period following the effective date of the Executive’s separation from service from the Company (the “Review Period”) (with the
exception of the pro rata annual bonus payment described in Section 4.e.ii.b., which shall be payable after the bonus funding level is determined
but in no event later than March 15 of the calendar year following the year in which the Executive’s termination occurs). The separation agreement
and general release will be provided to the Executive on or before the fifth (5th) day following such separation from service. If the Executive fails
or refuses to return such agreement within the Review Period, the applicable severance payments and benefits will be forfeited. If the Executive is
eligible for the severance pay and benefits described in Section 4.e.ii., then he shall not be eligible for and shall not receive the severance pay and
benefits described in Section 4.e.iv. Similarly, if the Executive is eligible for the severance pay and benefits described in Section 4.e.iv., then he
shall not be eligible for and shall not receive the severance pay and benefits described in Section 4.e.ii.

5. Nondisclosure, Non-Solicitation and Assignment Agreement. As a condition of the Executive’s employment by the Company and the payment
of compensation and receipt of benefits referred to above, the Executive agrees to continue to be bound by the terms of the standard Nondisclosure, Non-
Solicitation and Assignment Agreement, entered into by the Executive as of January 14, 2016 (the “Nondisclosure Agreement”). The Executive
acknowledges that the Company would not offer him employment or provide compensation and/or benefits set forth above if he was not willing to be bound
by the terms of such Nondisclosure Agreement.

6. Notice.

a.    To the Company. The Executive will send all communications to the Company in writing, addressed as follows (or in any other manner the

Company notifies him to use):

Douglas M. Fambrough III, Ph.D. President and CEO
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

With a copy to:

General Counsel
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

b.    To the Executive. All communications from the Company to the Executive relating to this Agreement shall be sent to the Executive in

writing, at the most recent address on file with the Company.

With a copy to:

John B. Green
91 Elliot Drive
Lowell, MA 01852

c.    Time Notice Deemed Given. Notice shall be deemed to have been given when delivered or, if earlier (1) three business days after mailing by

United States certified or registered mail, return receipt requested, postage prepaid, or
(2) sent by overnight mail or delivery with confirmation of delivery, in either case, addressed as required in this section.

7. Amendment. No provisions of this Agreement may be modified, waived, or discharged except by a written document signed by a Company officer

duly authorized by the Board and the Executive. A waiver of any conditions or provisions of this Agreement in a given instance shall not be deemed a
waiver of such conditions or provisions at any other time in the future.

5

8. Choice of Law; Forum Selection. The validity, interpretation, construction, and performance of this Agreement shall be governed by the laws of
the Commonwealth of Massachusetts without regard to its conflicts of laws principles. Any claims or legal actions by one party against the other regarding
this Agreement shall be commenced and maintained exclusively in any state or federal court located in the Commonwealth of Massachusetts, and the parties
hereby submit to the jurisdiction and venue of any such court.

9. Successors. This Agreement shall be binding upon, and shall inure to the benefit of, the Executive and his estate, but the Executive may not assign

or pledge this Agreement or any rights arising under it. Without the Executive’s consent, the Company may assign this Agreement to any affiliate or to a
successor to substantially all the business and assets of the Company.

10. Taxes; Code Sections 409A and 280G.

a.    The Company shall withhold taxes from payments it makes pursuant to this Agreement as it reasonably determines to be required by

applicable law.

b.    If the benefits set forth in Section 4.e. of this Agreement constitute “non-qualified deferred compensation” subject to Section 409A, then the

following conditions apply to the payment of such benefits:

i.    Any termination of the Executive’s employment triggering payment of benefits under Section 4.e. must constitute a “separation from

service” under Section 409A(a)(2)(A)(i) of the Code, and Treas. Reg.
§1.409A-1(h) before distribution of such benefits can commence. To the extent that the termination of the Executive’s employment does not
constitute a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h) (as the result of further services that
are reasonably anticipated to be provided by the Executive to the Company at the time the Executive’s employment terminates), any benefits
payable under Section 4.e. that constitute non-qualified deferred compensation under Section 409A shall be delayed until after the date of a
subsequent event constituting a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h). For purposes of
clarification, this Section shall not cause any forfeiture of benefits on the Executive’s part, but shall only act as a delay until such time as a
“separation from service” occurs.

ii.    If the Executive is a “specified employee” (as that term is used in Section 409A and regulations and other guidance issued thereunder) on
the date his separation from service becomes effective, any benefits payable under Section 4.e. that constitute non-qualified deferred compensation
subject to Section 409A shall be delayed until the earlier of: (A) the business day following the six-month anniversary of the date his separation
from service becomes effective, or (B) the date of the Executive’s death, but only to the extent necessary to avoid the adverse tax consequences
and penalties under Section 409A. On the earlier of: (A) the business day following the six-month anniversary of the date his separation from
service becomes effective, or (B) the Executive’s death, the Company shall pay the Executive in a lump sum the aggregate value of the non-
qualified deferred compensation that the Company otherwise would have paid the Executive prior to that date under Section 4.e.

iii.    If any amount to be paid to the Executive pursuant to this Agreement is “deferred compensation” subject to Section 409A, then each
such payment which is conditioned upon Executive’s execution of a release and which is to be paid or provided during a designated period that
begins in one taxable year and ends in a second taxable year, shall be paid or provided in the later of the two taxable years.

iv.    It is intended that each installment of the payments and benefits provided under Section 4.e. shall be treated as a separate “payment” for

purposes of Section 409A.

v.    Neither the Company nor the Executive shall have the right to accelerate or defer the delivery of any such payments or benefits except to

the extent specifically permitted or required by Section 409A.

c.    Notwithstanding any other provision of this Agreement to the contrary, in the event of any ambiguity in the terms of this Agreement, such

term(s) shall be interpreted and at all times administered in a manner that avoids the
inclusion of compensation in income under Section 409A, or the payment of increased taxes, excise taxes or other penalties under Section 409A.

d.    The parties intend this Agreement to be in compliance with Section 409A. Executive acknowledges and agrees that Company does not

guarantee the tax treatment or tax consequences associated with any payment or benefit arising under this Agreement, including but not limited to
consequences related to Section 409A.

6

e.    If any payment or benefit the Executive would receive under this Agreement, when combined with any other payment or benefit Executive

receives pursuant to a Change of Control (whether under this Agreement or otherwise) (such payment or benefit, for purposes of this section, a “Payment”)
would: (i) constitute a “parachute payment” within the meaning of Section 280G of the Code; and (ii) but for this sentence, be subject to the excise tax
imposed by Section 4999 of the Code (the “Excise Tax”), then such Payment shall be either: (A) the full amount of such Payment; or (B) such lesser amount
as would result in no portion of the Payment being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal,
state and local employments taxes, income taxes, and the Excise Tax, results in Executive’s receipt, on an after-tax basis, of the greater amount of the
Payment notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. The Payments will be reduced in the following order:
(A) reduction of any cash severance payments otherwise payable to the Executive that are exempt from Section 409A of the Code;
(B) reduction of any other cash payments or benefits otherwise payable to the Executive that are exempt from Section 409A of the Code, but excluding any
payments attributable to any acceleration of vesting or payments with respect to any equity awards that are exempt from Section 409A of the Code; (C)
reduction of any other payments or benefits otherwise payable to the Executive on a pro-rata basis or such other manner that complies with Section 409A of
the Code, but excluding any payments attributable to any acceleration of vesting and payments with respect to any equity awards that are exempt from
Section 409A of the Code; and (D) reduction of any payments attributable to any acceleration of vesting or payments with respect to any equity awards that
are exempt from Section 409A of the Code, in each case beginning with payments that would otherwise be made last in time.

11. Validity. The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other

provision of this Agreement, which shall remain in full force and effect.

12. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of which

together shall constitute the same instrument.

13.

Entire Agreement; Prior Agreements. This Agreement constitutes the entire agreement among the parties with respect to the subject matter

hereof and, unless otherwise provided herein, supersedes all prior agreements, negotiations or understandings, written or oral, in respect thereof.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

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Date: 2/21/2020

DICERNA PHARMACEUTICALS, INC.

/s/ Douglas M. Fambrough III, PhD.
By: Douglas Fambrough III, Ph.D.
Its: President and CEO

Date: 2/25/2020

/s/ John Green

John B. Green
Chief Financial Officer

8

EMPLOYMENT AGREEMENT (Revised)

Exhibit 10.30

EMPLOYMENT AGREEMENT (“Agreement”) made this February 21, 2020 (the “Effective Date”) between Dicerna Pharmaceuticals, Inc., a

Delaware corporation (“Company”), on the one hand and James B. Weissman (the “Executive”) on the other hand.

WHEREAS, the Company desires to employ the Executive and the Executive desires to be employed by the Company, on terms set forth herein;

NOW, THEREFORE, in consideration of the mutual agreements set forth herein, the parties agree as follows:

1. Term of Employment. The Executive’s employment under this Agreement shall commence on the Effective Date and shall end on such date as the
Executive’s employment terminates in accordance with Section 4 of this Agreement. Subject to the balance of this Agreement, the Executive shall be an at-
will employee of the Company whose employment may be terminated (by the Company or by the Executive) at any time, for any or no reason, in which
case the Executive will be entitled to the separation benefits set forth in Section 4, below.

2. Duties. During his employment with the Company, the Executive shall have the title of Executive Vice President and Chief Operating Officer. The
Executive shall devote his full business time and effort to the performance of his duties for the Company, which he shall perform faithfully and to the best of
his ability. The Executive shall have all of the customary powers and duties associated with his position and shall be subject to the Company’s policies,
procedures, and approval practices, as generally in effect from time to time for all senior executives of the Company and the direction and oversight of the
Board. The Executive will report directly to the Chief Executive Officer of the Company.

3. Compensation and Related Matters.

a.    Base Salary. The Company shall pay the Executive base salary at a rate of $17,724 paid twice monthly (which annualizes to $425,384), less

withholdings and deductions required and/or permitted by law. The Executive’s base salary shall be paid in conformity with the Company’s payroll practices
generally applicable to the Company’s senior executives.

b.    Signing and Annual Bonus. The Company paid the Executive a one-time signing bonus (the “Signing Bonus”) of $60,000 (less applicable

withholding taxes and deductions) payable within 30 days of the Executive’s start date at the Company. The Signing Bonus is subject to the following
repayment obligations: as a condition of the Executive’s employment with the Company and for receiving the Signing Bonus, the Executive agrees that if, at
any time during the twelve months following the Executive’s first date of employment with the Company, the Executive (a) resigns his employment with the
Company, he shall repay the Signing Bonus, on a pro-rata basis based on length of service; or
(b) the Company terminates the Executive’s employment for Cause, he shall repay the Signing Bonus in-full, and in all cases specifically authorize the
Company to deduct all of the Signing Bonus required to be repaid from his last paycheck and to the extent that there is a balance still owed by the
Executive, he will provide payment of such balance within thirty days (30) of his last date of employment. The Executive shall be eligible to be considered
for an Annual Bonus upon achieving of certain pre-determined performance targets consistent with any Incentive Compensation Plan established by the
Compensation Committee (the “Committee”). The Annual Bonus shall be based, in part, on the Executive’s performance. The grant of such a bonus shall be
in the sole discretion of the Committee. The maximum bonus amount for which the Executive will be eligible is forty-five percent (45%)of base salary
earned for the calendar year, provided that, the Annual Bonus for the first year of employment shall be prorated based on the date of hire. The Annual Bonus
will be earned only after it has been granted by the Committee. The Annual Bonus shall be paid to the Executive following the close of the fiscal year to
which it relates, in no event later than March 15th of the calendar year immediately following the calendar year in which it was earned. The Executive must
be actively employed by the Company at the time the Committee considers granting of bonuses to be eligible to receive such bonus.

c.    Equity Compensation. Subject to approval of the Board or an appropriate committee thereof, Executive shall be eligible for equity
compensation awards, in such amounts and subject to such terms as shall be commensurate with awards granted to other senior executives of the Company.

1

d. Benefits. During his employment with the Company, the Executive shall be entitled to participate in all

employee benefit plans and programs, including paid sick leave and holidays, life insurance, disability, medical, dental, and retirement savings plans, to the
same extent generally available to senior executives of the Company, in accordance with the terms of those plans and programs. The Executive shall be
permitted up to four weeks of paid vacation per year, which will accrue on a monthly basis. The Executive will not be allowed to accumulate more than
three weeks of unused vacation days at any given time. The Executive may carry over a maximum of ten unused vacation days from one calendar year to the
next.

e.    Expenses. The Company agrees to reimburse the Executive for reasonable out-of-pocket expenses incurred in connection with Company
business and within standards to be established by the Board from time to time, including, without limitation, travel and accommodations for authorized
business trips, provided vouchers therefor, or other supporting information as the Company may reasonably require, are presented to the Company. All
reimbursements provided under this Agreement shall be made or provided in accordance with the requirements of Section 409A of the Internal Revenue
Code of 1986, as amended (the “Code”) and the rules and regulations thereunder (“Section 409A”) including, where applicable, the requirement that (i) any
reimbursement is for expenses incurred during the Executive’s lifetime (or during a shorter period of time specified in this Agreement); (ii) the amount of
expenses eligible for reimbursement during a calendar year may not affect the expenses eligible for reimbursement in any other calendar year; (iii) the
reimbursement of an eligible expense shall be made no later than the last day of the calendar year following the year in which the expense is incurred; and
(iv) the right to reimbursement or in kind benefits is not subject to liquidation or exchange for another benefit.

4. Termination

a.    Rights and Duties. The Executive is an employee “at will.” Accordingly, the Company or the Executive may terminate his employment, at

any time with or without cause, for any lawful reason, or no reason. The Executive and the Company agree that, without modifying or altering the
Executive’s “at will” status, each will provide the other with at least thirty (30) days’ prior written notice of termination of the Executive’s employment with
the Company. If the Executive gives notice of termination, except in the case of a termination by the Executive for “Good Reason” as set forth below, such
notice will be deemed a voluntary resignation by the Executive and the Company, in its sole discretion, may elect to relieve the Executive of any obligation
to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s employment, without changing
the status of such termination as a voluntary resignation by the Executive. Should the Company in the event of a voluntary resignation decide to relieve the
Executive of any obligation to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s
employment, it shall nonetheless continue his compensation and benefits for the term of the notice period, except that no bonus shall be earned or awarded
during and after the notice period.

b.    Termination for “Good Reason.” The Executive may terminate his employment at any time for “Good Reason.” “Good Reason” shall

comport with the requirements of Regulation §1.409A-l(n)(2)(ii) and shall mean:

i. A material diminution in the Executive’s authority, duties, responsibilities or reporting responsibilities;

ii.    A material diminution by the Company of the Executive’s annual base compensation then in effect, except a material diminution

generally affecting the members of the Company’s management;

iii.    Any action or inaction by the Company that constitutes a material breach by the Company of the terms of this Agreement; or

iv.    A requirement that the Executive be based more than 50 miles from the offices at which he was principally employed immediately prior

to the date of termination.

The parties acknowledge and agree that “Good Reason” shall not be deemed to have occurred unless: (1) the Executive provides the Company with
written notice that he intends to terminate his employment hereunder for one of the Good Reason grounds set forth in Section 4.b. within sixty (60) days of
the initial occurrence of such ground, with such notice containing a description of such ground, (2) if such Good Reason ground is capable of being cured,
the Company has failed to cure such ground within a period of thirty (30) days from the date of such written notice, and (3) the Executive terminates his
employment within ninety-one (91) days from the date that such Good Reason ground first occurs. For purposes of clarification, the above-listed conditions
shall apply separately to each occurrence of a Good Reason ground, and failure to adhere to such conditions in the event of the occurrence of grounds that
would otherwise

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have constituted Good Reason had the conditions herein been satisfied shall not disqualify the Executive from asserting and satisfying the conditions for
Good Reason for any subsequent occurrence that may constitute Good Reason.

c.    Termination by the Company for Cause. The Company may terminate the Executive’s employment at any time for “Cause.” “Cause” shall

mean:

i.    The Executive’s commission of an act of fraud, dishonesty, breach of fiduciary duty or misappropriation which may or does adversely

affect the Company;

ii.    The Executive’s conviction or plea of guilty or nolo contendere to or engaging in any felony or crime involving moral turpitude, fraud,
misrepresentation or other crime and/or indictment for a crime that, in the reasonable opinion of the Company, affects the Executive’s ability to
perform the duties set forth in this Agreement and/or reflects negatively upon the Company;

iii.    Unauthorized disclosure by the Executive of the Company’s Proprietary Information, as defined in the Nondisclosure Agreement (as

defined in Section 5 below), which results or could have been reasonably foreseen to result, in a material financial loss to the Company;

iv.    The Executive’s material breach of this Agreement or the Nondisclosure Agreement; provided, that if such breach is reasonably possible

of being cured in the opinion of the Company, then the Executive will be given thirty (30) days after written notice from the Company of such
breach to cure; or

v.    The Executive’s failure (which shall not include any Disability as defined below) or refusal to perform the duties and responsibilities of

his employment and/or to follow the policies and procedures of the Company, including without limitation the failure or refusal to carry out lawful
instructions from the Board. If such failure or refusal is reasonably possible of being cured in the opinion of the Company, then the Executive will
be given thirty (30) days after written notice from the Company of such failure or refusal to cure.

d.    Termination in the Event of Death or Disability. The Agreement shall terminate upon the Executive’s death or Disability, and the
Executive’s employment with the Company shall thereupon terminate. For purposes of the Agreement, “Disability” is defined as any illness, injury, accident
or condition of either a physical or psychological nature as a result of which the Executive is unable to perform the essential functions of his duties and
responsibilities hereunder for 90 days during any period of 365 consecutive calendar days or for any consecutive 90-day period.

e. Effect of Termination.

i.    If the Executive is terminated by the Company for Cause, or by the Executive voluntarily other than for Good Reason, then the Executive

will only be entitled to payment when due of any unpaid base salary, expense reimbursements, and vacation days accrued but unused prior to
termination of employment.

ii.    If the Executive’s employment is terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability,

or by the Executive for Good Reason (each of which will be deemed an involuntary termination), then the Executive will be entitled to payment
when due of any unpaid base salary, expense reimbursements, and vacation days accrued prior to termination of employment and, in exchange for
the Executive’s execution of a separation agreement and general release provided by the Company (including, at the Company’s option, a non-
competition obligation during any salary continuation period and (at the Company’s option) a revocation period of seven (7) business days) and
expressly subject to the conditions described in Section 4.e.vi. below, the following:

a)    Continuation of the Executive’s base salary at the rate in effect as of the day immediately preceding his date of termination for a
twelve (12) month period, payable in accordance with the Company’s regular payroll practices, less applicable withholdings, commencing at
the conclusion of the Review Period (as described below), provided that the first installment of such payments shall include all amounts
which would have been paid during the period between the Executive’s date of termination and the date of such first installment;

b)    Payment of a pro-rata portion of the actual amount of the Executive’s Annual Bonus based on actual performance determined

under the terms of the Company’s annual bonus program as then in effect, with such pro-rata portion calculated by multiplying the actual
amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the number of days worked
by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three

3

hundred sixty five (365), with such payment to be made after the determination of the bonus funding level (but in no event later than March
15 of the calendar year following the year in which the Executive’s termination occurs); and

c)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) twelve (12) months or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for premium payments for continuation of
such group health insurance coverage pursuant to the terms and conditions of COBRA.

iii.    If the Agreement is terminated because of the Executive’s death, the Company shall pay to the estate of the Executive the salary and

benefits which would otherwise have been payable to the Executive up to the date of termination of his employment because of death.

iv.    In the event of a Change of Control (as defined below) occurs and, if within one (1) year thereafter, the Executive’s employment is
terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability, or by the Executive for Good Reason (each
of which will be deemed an involuntary termination), then the Executive will be entitled to payment when due of any unpaid base salary, expense
reimbursements, and vacation days accrued prior to termination of employment and, in exchange for the Executive’s execution of a separation
agreement and general release provided by the Company (including, at the Company’s option, a non-competition obligation during any salary
continuation period and (at the Company’s option) a revocation period of seven (7) business days) and expressly subject to the conditions
described in Section 4.e.vi. below, the following:

a)    A lump sum payment equal to the sum of (i) one (1) year of the Executive’s base salary at the rate in effect as of the day
immediately preceding his date of termination, less applicable withholdings, plus (ii) the Executive’s target annual bonus for the year in
which the termination occurs, less applicable withholdings, payable at the conclusion of the Review Period (as described below);

b)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) one (1) year or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for premium payments for continuation of
such group health insurance coverage pursuant to the terms and conditions of COBRA; and

c)    Payment of a pro-rata portion of the target amount of the Executive’s annual bonus, with such pro-rata portion calculated by
multiplying the target amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the
number of days worked by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three hundred sixty
five (365), with such payment to be made at the conclusion of the Review Period (but in no event later than March 15 of the calendar year
following the year in which the Executive’s termination occurs).

v.     In addition, in the event of a Change of Control, notwithstanding anything to the contrary in any applicable option agreement or stock-
based award agreement, all time-based stock options and other time-based stock-based awards held by the Executive, to the extent unvested as of
immediately prior to the Change of Control shall immediately accelerate and become fully exercisable or nonforfeitable immediately prior to the
consummation of the Change of Control.

For purposes of this Agreement, “Change of Control” means (A) the occurrence of a merger or consolidation of the Company whether or not

approved by the Board, other than (i) a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior
thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity or the parent of such
corporation) at least 50% of the total voting power represented by the voting securities of the Company or such surviving entity or parent of such
corporation outstanding immediately after such merger or consolidation, or (ii) a merger or consolidation which is in

4

effect a financing transaction for the Company, including, but not limited to, a reverse merger of the Company into a publicly traded “shell” company, or (B)
the stockholders of the Company approve an agreement for the sale or disposition by the Company of all or substantially all of the Company’s assets,
provided that, in any case, “Change of Control” shall be in accordance with Regulation §1.409A-3(i)(5).

vi.    Payment of the severance pay and benefits described in Section 4.e.ii. or 4.e.iv., as applicable, is expressly conditioned on the

Executive’s execution without revocation of the separation agreement and general release described therein, within the time period prescribed in
the separation agreement and general release (which release shall include, at the Company’s option, a non-competition obligation during any salary
continuation period and (at the Company’s option) a revocation period of seven (7) business days), and will commence immediately following a
sixty (60) day period following the effective date of the Executive’s separation from service from the Company (the “Review Period”) (with the
exception of the pro rata annual bonus payment described in Section 4.e.ii.b., which shall be payable after the bonus funding level is determined
but in no event later than March 15 of the calendar year following the year in which the Executive’s termination occurs). The separation agreement
and general release will be provided to the Executive on or before the fifth (5th) day following such separation from service. If the Executive fails
or refuses to return such agreement within the Review Period, the applicable severance payments and benefits will be forfeited. If the Executive is
eligible for the severance pay and benefits described in Section 4.e.ii., then he shall not be eligible for and shall not receive the severance pay and
benefits described in Section 4.e.iv. Similarly, if the Executive is eligible for the severance pay and benefits described in Section 4.e.iv., then he
shall not be eligible for and shall not receive the severance pay and benefits described in Section 4.e.ii.

5. Nondisclosure, Non-Solicitation and Assignment Agreement. As a condition of the Executive’s employment by the Company and the payment
of compensation and receipt of benefits referred to above, the Executive agrees to continue to be bound by the terms of the standard Nondisclosure, Non-
Solicitation and Assignment Agreement, entered into by the Executive as of 12/5/2011 (the “Nondisclosure Agreement”). The Executive acknowledges
that the Company would not offer him employment or provide compensation and/or benefits set forth above if he was not willing to be bound by the terms
of such Nondisclosure Agreement.

6. Notice.

a.    To the Company. The Executive will send all communications to the Company in writing, addressed as follows (or in any other manner the

Company notifies him to use):

Douglas M. Fambrough III, Ph.D. President and CEO
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

With a copy to:

General Counsel
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

b.    To the Executive. All communications from the Company to the Executive relating to this Agreement shall be sent to the Executive in

writing, at the most recent address on file with the Company.

With a copy to:

James B. Weissman
9 Evans Ave
Bedford, MA 01730

5

c.    Time Notice Deemed Given. Notice shall be deemed to have been given when delivered or, if earlier (1) three business days after mailing by

United States certified or registered mail, return receipt requested, postage prepaid, or
(2) sent by overnight mail or delivery with confirmation of delivery, in either case, addressed as required in this section.

7. Amendment. No provisions of this Agreement may be modified, waived, or discharged except by a written document signed by a Company officer

duly authorized by the Board and the Executive. A waiver of any conditions or provisions of this Agreement in a given instance shall not be deemed a
waiver of such conditions or provisions at any other time in the future.

8. Choice of Law; Forum Selection. The validity, interpretation, construction, and performance of this Agreement shall be governed by the laws of
the Commonwealth of Massachusetts without regard to its conflicts of laws principles. Any claims or legal actions by one party against the other regarding
this Agreement shall be commenced and maintained exclusively in any state or federal court located in the Commonwealth of Massachusetts, and the parties
hereby submit to the jurisdiction and venue of any such court.

9. Successors. This Agreement shall be binding upon, and shall inure to the benefit of, the Executive and his estate, but the Executive may not assign

or pledge this Agreement or any rights arising under it. Without the Executive’s consent, the Company may assign this Agreement to any affiliate or to a
successor to substantially all the business and assets of the Company.

10. Taxes; Code Sections 409A and 280G.

a.    The Company shall withhold taxes from payments it makes pursuant to this Agreement as it reasonably determines to be required by

applicable law.

b.    If the benefits set forth in Section 4.e. of this Agreement constitute “non-qualified deferred compensation” subject to Section 409A, then the

following conditions apply to the payment of such benefits:

i.    Any termination of the Executive’s employment triggering payment of benefits under Section 4.e. must constitute a “separation from

service” under Section 409A(a)(2)(A)(i) of the Code, and Treas. Reg.
§1.409A-1(h) before distribution of such benefits can commence. To the extent that the termination of the Executive’s employment does not
constitute a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h) (as the result of further services that
are reasonably anticipated to be provided by the Executive to the Company at the time the Executive’s employment terminates), any benefits
payable under Section 4.e. that constitute non-qualified deferred compensation under Section 409A shall be delayed until after the date of a
subsequent event constituting a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h). For purposes of
clarification, this Section shall not cause any forfeiture of benefits on the Executive’s part, but shall only act as a delay until such time as a
“separation from service” occurs.

ii.    If the Executive is a “specified employee” (as that term is used in Section 409A and regulations and other guidance issued thereunder) on
the date his separation from service becomes effective, any benefits payable under Section 4.e. that constitute non-qualified deferred compensation
subject to Section 409A shall be delayed until the earlier of: (A) the business day following the six-month anniversary of the date his separation
from service becomes effective, or (B) the date of the Executive’s death, but only to the extent necessary to avoid the adverse tax consequences
and penalties under Section 409A. On the earlier of: (A) the business day following the six-month anniversary of the date his separation from
service becomes effective, or (B) the Executive’s death, the Company shall pay the Executive in a lump sum the aggregate value of the non-
qualified deferred compensation that the Company otherwise would have paid the Executive prior to that date under Section 4.e.

iii.    If any amount to be paid to the Executive pursuant to this Agreement is “deferred compensation” subject to Section 409A, then each
such payment which is conditioned upon Executive’s execution of a release and which is to be paid or provided during a designated period that
begins in one taxable year and ends in a second taxable year, shall be paid or provided in the later of the two taxable years.

iv.    It is intended that each installment of the payments and benefits provided under Section 4.e. shall be treated as a separate “payment” for

purposes of Section 409A.

v.    Neither the Company nor the Executive shall have the right to accelerate or defer the delivery of any such payments or benefits except to

the extent specifically permitted or required by Section 409A.

6

c.    Notwithstanding any other provision of this Agreement to the contrary, in the event of any ambiguity in the terms of this Agreement, such

term(s) shall be interpreted and at all times administered in a manner that avoids the
inclusion of compensation in income under Section 409A, or the payment of increased taxes, excise taxes or other penalties under Section 409A.

d.    The parties intend this Agreement to be in compliance with Section 409A. Executive acknowledges and agrees that Company does not

guarantee the tax treatment or tax consequences associated with any payment or benefit arising under this Agreement, including but not limited to
consequences related to Section 409A.

e.    If any payment or benefit the Executive would receive under this Agreement, when combined with any other payment or benefit Executive

receives pursuant to a Change of Control (whether under this Agreement or otherwise) (such payment or benefit, for purposes of this section, a “Payment”)
would: (i) constitute a “parachute payment” within the meaning of Section 280G of the Code; and (ii) but for this sentence, be subject to the excise tax
imposed by Section 4999 of the Code (the “Excise Tax”), then such Payment shall be either: (A) the full amount of such Payment; or (B) such lesser amount
as would result in no portion of the Payment being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal,
state and local employments taxes, income taxes, and the Excise Tax, results in Executive’s receipt, on an after-tax basis, of the greater amount of the
Payment notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. The Payments will be reduced in the following order:
(A) reduction of any cash severance payments otherwise payable to the Executive that are exempt from Section 409A of the Code;
(B) reduction of any other cash payments or benefits otherwise payable to the Executive that are exempt from Section 409A of the Code, but excluding any
payments attributable to any acceleration of vesting or payments with respect to any equity awards that are exempt from Section 409A of the Code; (C)
reduction of any other payments or benefits otherwise payable to the Executive on a pro-rata basis or such other manner that complies with Section 409A of
the Code, but excluding any payments attributable to any acceleration of vesting and payments with respect to any equity awards that are exempt from
Section 409A of the Code; and (D) reduction of any payments attributable to any acceleration of vesting or payments with respect to any equity awards that
are exempt from Section 409A of the Code, in each case beginning with payments that would otherwise be made last in time.

11. Validity. The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other

provision of this Agreement, which shall remain in full force and effect.

12. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of which

together shall constitute the same instrument.

13.

Entire Agreement; Prior Agreements. This Agreement constitutes the entire agreement among the parties with respect to the subject matter

hereof and, unless otherwise provided herein, supersedes all prior agreements, negotiations or understandings, written or oral, in respect thereof.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

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Date:    2/21/2020 /s/ Douglas M. Fambrough_______

Date:    2/24/2020 /s/ James B. Weissman

DICERNA PHARMACEUTICALS, INC.

By: Douglas M. Fambrough III, Ph.D.
Its: President and CEO

James B. Weissman
EVP and Chief Operating Officer

8

EMPLOYMENT AGREEMENT (Revised)

Exhibit 10.31

EMPLOYMENT AGREEMENT (“Agreement”) made this February 21, 2020 (the “Effective Date”) between Dicerna Pharmaceuticals, Inc., a

Delaware corporation (“Company”), on the one hand and Bob D. Brown (the “Executive”) on the other hand.

WHEREAS, the Company desires to employ the Executive and the Executive desires to be employed by the Company, on terms set forth herein;

NOW, THEREFORE, in consideration of the mutual agreements set forth herein, the parties agree as follows:

1. Term of Employment. The Executive’s employment under this Agreement shall commence on the Effective Date and shall end on such date as the
Executive’s employment terminates in accordance with Section 4 of this Agreement. Subject to the balance of this Agreement, the Executive shall be an at-
will employee of the Company whose employment may be terminated (by the Company or by the Executive) at any time, for any or no reason, in which
case the Executive will be entitled to the separation benefits set forth in Section 4, below.

2. Duties. During his employment with the Company, the Executive shall have the title of Executive Vice President, Research & Development and

Chief Scientific Officer. The Executive shall devote his full business time and effort to the performance of his duties for the Company, which he shall
perform faithfully and to the best of his ability. The Executive shall have all of the customary powers and duties associated with his position and shall be
subject to the Company’s policies, procedures, and approval practices, as generally in effect from time to time for all senior executives of the Company and
the direction and oversight of the Board. The Executive will report directly to the Chief Executive Officer & President of the Company.

3. Compensation and Related Matters.

a.    Base Salary. The Company shall pay the Executive base salary at a rate of $20,002 paid twice monthly (which annualizes to $480,041), less

withholdings and deductions required and/or permitted by law. The Executive’s base salary shall be paid in conformity with the Company’s payroll practices
generally applicable to the Company’s senior executives.

b.    Annual Bonus.

The Executive shall be eligible to be considered for an Annual Bonus upon achieving of certain pre-determined performance targets consistent with any
Incentive Compensation Plan established by the Compensation Committee (the “Committee”). The Annual Bonus shall be based, in part, on the Executive’s
performance. The grant of such a bonus shall be in the sole discretion of the Committee. The maximum bonus amount for which the Executive will be
eligible is forty-five percent (45%)of base salary earned for the calendar year, provided that, the Annual Bonus for the first year of employment shall be
prorated based on the date of hire. The Annual Bonus will be earned only after it has been granted by the Committee. The Annual Bonus shall be paid to the
Executive following the close of the fiscal year to which it relates, in no event later than March 15th of the calendar year immediately following the calendar
year in which it was earned. The Executive must be actively employed by the Company at the time the Committee considers granting of bonuses to be
eligible to receive such bonus.

c.    Equity Compensation. Subject to approval of the Board or an appropriate committee thereof, Executive shall be eligible for equity
compensation awards, in such amounts and subject to such terms as shall be commensurate with awards granted to other senior executives of the Company.

d. Benefits. During his employment with the Company, the Executive shall be entitled to participate in all

employee benefit plans and programs, including paid sick leave and holidays, life insurance, disability, medical, dental, and retirement savings plans, to the
same extent generally available to senior executives of the Company, in accordance with the terms of those plans and programs. The Executive shall be
permitted up to four weeks of paid vacation per year, which will accrue on a monthly basis. The Executive will not be allowed to accumulate more than
three weeks of unused vacation days at any given time. The Executive may carry over a maximum of ten unused vacation days from one calendar year to the
next.

1

e.    Expenses. The Company agrees to reimburse the Executive for reasonable out-of-pocket expenses incurred in connection with Company
business and within standards to be established by the Board from time to time, including, without limitation, travel and accommodations for authorized
business trips, provided vouchers therefor, or other supporting information as the Company may reasonably require, are presented to the Company. All
reimbursements provided under this Agreement shall be made or provided in accordance with the requirements of Section 409A of the Internal Revenue
Code of 1986, as amended (the “Code”) and the rules and regulations thereunder (“Section 409A”) including, where applicable, the requirement that (i) any
reimbursement is for expenses incurred during the Executive’s lifetime (or during a shorter period of time specified in this Agreement); (ii) the amount of
expenses eligible for reimbursement during a calendar year may not affect the expenses eligible for reimbursement in any other calendar year; (iii) the
reimbursement of an eligible expense shall be made no later than the last day of the calendar year following the year in which the expense is incurred; and
(iv) the right to reimbursement or in kind benefits is not subject to liquidation or exchange for another benefit.

4. Termination

a.    Rights and Duties. The Executive is an employee “at will.” Accordingly, the Company or the Executive may terminate his employment, at

any time with or without cause, for any lawful reason, or no reason. The Executive and the Company agree that, without modifying or altering the
Executive’s “at will” status, each will provide the other with at least thirty (30) days’ prior written notice of termination of the Executive’s employment with
the Company. If the Executive gives notice of termination, except in the case of a termination by the Executive for “Good Reason” as set forth below, such
notice will be deemed a voluntary resignation by the Executive and the Company, in its sole discretion, may elect to relieve the Executive of any obligation
to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s employment, without changing
the status of such termination as a voluntary resignation by the Executive. Should the Company in the event of a voluntary resignation decide to relieve the
Executive of any obligation to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s
employment, it shall nonetheless continue his compensation and benefits for the term of the notice period, except that no bonus shall be earned or awarded
during and after the notice period.

b.    Termination for “Good Reason.” The Executive may terminate his employment at any time for “Good Reason.” “Good Reason” shall

comport with the requirements of Regulation §1.409A-l(n)(2)(ii) and shall mean:

i. A material diminution in the Executive’s authority, duties, responsibilities or reporting responsibilities;

ii.    A material diminution by the Company of the Executive’s annual base compensation then in effect, except a material diminution

generally affecting the members of the Company’s management;

iii.    Any action or inaction by the Company that constitutes a material breach by the Company of the terms of this Agreement; or

iv.    A requirement that the Executive be based more than 50 miles from the offices at which he was principally employed immediately prior

to the date of termination.

The parties acknowledge and agree that “Good Reason” shall not be deemed to have occurred unless: (1) the Executive provides the Company with
written notice that he intends to terminate his employment hereunder for one of the Good Reason grounds set forth in Section 4.b. within sixty (60) days of
the initial occurrence of such ground, with such notice containing a description of such ground, (2) if such Good Reason ground is capable of being cured,
the Company has failed to cure such ground within a period of thirty (30) days from the date of such written notice, and (3) the Executive terminates his
employment within ninety-one (91) days from the date that such Good Reason ground first occurs. For purposes of clarification, the above-listed conditions
shall apply separately to each occurrence of a Good Reason ground, and failure to adhere to such conditions in the event of the occurrence of grounds that
would otherwise have constituted Good Reason had the conditions herein been satisfied shall not disqualify the Executive from asserting and satisfying the
conditions for Good Reason for any subsequent occurrence that may constitute Good Reason.

c.    Termination by the Company for Cause. The Company may terminate the Executive’s employment at any time for “Cause.” “Cause” shall

mean:

i.    The Executive’s commission of an act of fraud, dishonesty, breach of fiduciary duty or misappropriation which may or does adversely

affect the Company;

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ii.    The Executive’s conviction or plea of guilty or nolo contendere to or engaging in any felony or crime involving moral turpitude, fraud,
misrepresentation or other crime and/or indictment for a crime that, in the reasonable opinion of the Company, affects the Executive’s ability to
perform the duties set forth in this Agreement and/or reflects negatively upon the Company;

iii.    Unauthorized disclosure by the Executive of the Company’s Proprietary Information, as defined in the Nondisclosure Agreement (as

defined in Section 5 below), which results or could have been reasonably foreseen to result, in a material financial loss to the Company;

iv.    The Executive’s material breach of this Agreement or the Nondisclosure Agreement; provided, that if such breach is reasonably possible

of being cured in the opinion of the Company, then the Executive will be given thirty (30) days after written notice from the Company of such
breach to cure; or

v.    The Executive’s failure (which shall not include any Disability as defined below) or refusal to perform the duties and responsibilities of

his employment and/or to follow the policies and procedures of the Company, including without limitation the failure or refusal to carry out lawful
instructions from the Board. If such failure or refusal is reasonably possible of being cured in the opinion of the Company, then the Executive will
be given thirty (30) days after written notice from the Company of such failure or refusal to cure.

d.    Termination in the Event of Death or Disability. The Agreement shall terminate upon the Executive’s death or Disability, and the
Executive’s employment with the Company shall thereupon terminate. For purposes of the Agreement, “Disability” is defined as any illness, injury, accident
or condition of either a physical or psychological nature as a result of which the Executive is unable to perform the essential functions of his duties and
responsibilities hereunder for 90 days during any period of 365 consecutive calendar days or for any consecutive 90-day period.

e. Effect of Termination.

i.    If the Executive is terminated by the Company for Cause, or by the Executive voluntarily other than for Good Reason, then the Executive

will only be entitled to payment when due of any unpaid base salary, expense reimbursements, and vacation days accrued but unused prior to
termination of employment.

ii.    If the Executive’s employment is terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability,

or by the Executive for Good Reason (each of which will be deemed an involuntary termination), then the Executive will be entitled to payment
when due of any unpaid base salary, expense reimbursements, and vacation days accrued prior to termination of employment and, in exchange for
the Executive’s execution of a separation agreement and general release provided by the Company (including, at the Company’s option, a non-
competition obligation during any salary continuation period and (at the Company’s option) a revocation period of seven (7) business days) and
expressly subject to the conditions described in Section 4.e.vi. below, the following:

a)    Continuation of the Executive’s base salary at the rate in effect as of the day immediately preceding his date of termination for a
twelve (12) month period, payable in accordance with the Company’s regular payroll practices, less applicable withholdings, commencing at
the conclusion of the Review Period (as described below), provided that the first installment of such payments shall include all amounts
which would have been paid during the period between the Executive’s date of termination and the date of such first installment;

b)    Payment of a pro-rata portion of the actual amount of the Executive’s Annual Bonus based on actual performance determined

under the terms of the Company’s annual bonus program as then in effect, with such pro-rata portion calculated by multiplying the actual
amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the number of days worked
by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three hundred sixty five (365), with such
payment to be made after the determination of the bonus funding level (but in no event later than March 15 of the calendar year following
the year in which the Executive’s termination occurs); and

c)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) twelve (12) months or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for

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premium payments for continuation of such group health insurance coverage pursuant to the terms and conditions of COBRA.

iii.    If the Agreement is terminated because of the Executive’s death, the Company shall pay to the estate of the Executive the salary and

benefits which would otherwise have been payable to the Executive up to the date of termination of his employment because of death.

iv.    In the event of a Change of Control (as defined below) occurs and, if within one (1) year thereafter, the Executive’s employment is
terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability, or by the Executive for Good Reason (each
of which will be deemed an involuntary termination), then the Executive will be entitled to payment when due of any unpaid base salary, expense
reimbursements, and vacation days accrued prior to termination of employment and, in exchange for the Executive’s execution of a separation
agreement and general release provided by the Company (including, at the Company’s option, a non-competition obligation during any salary
continuation period and (at the Company’s option) a revocation period of seven (7) business days) and expressly subject to the conditions
described in Section 4.e.vi. below, the following:

a)    A lump sum payment equal to the sum of (i) one (1) year of the Executive’s base salary at the rate in effect as of the day
immediately preceding his date of termination, less applicable withholdings, plus (ii) the Executive’s target annual bonus for the year in
which the termination occurs, less applicable withholdings, payable at the conclusion of the Review Period (as described below);

b)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) one (1) year or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for premium payments for continuation of
such group health insurance coverage pursuant to the terms and conditions of COBRA; and

c)    Payment of a pro-rata portion of the target amount of the Executive’s annual bonus, with such pro-rata portion calculated by
multiplying the target amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the
number of days worked by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three hundred sixty
five (365), with such payment to be made at the conclusion of the Review Period (but in no event later than March 15 of the calendar year
following the year in which the Executive’s termination occurs).

v.     In addition, in the event of a Change of Control, notwithstanding anything to the contrary in any applicable option agreement or stock-
based award agreement, all time-based stock options and other time-based stock-based awards held by the Executive, to the extent unvested as of
immediately prior to the Change of Control shall immediately accelerate and become fully exercisable or nonforfeitable immediately prior to the
consummation of the Change of Control.

For purposes of this Agreement, “Change of Control” means (A) the occurrence of a merger or consolidation of the Company whether or not

approved by the Board, other than (i) a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior
thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity or the parent of such
corporation) at least 50% of the total voting power represented by the voting securities of the Company or such surviving entity or parent of such
corporation outstanding immediately after such merger or consolidation, or (ii) a merger or consolidation which is in effect a financing transaction for the
Company, including, but not limited to, a reverse merger of the Company into a publicly traded “shell” company, or (B) the stockholders of the Company
approve an agreement for the sale or disposition by the Company of all or substantially all of the Company’s assets, provided that, in any case, “Change of
Control” shall be in accordance with Regulation §1.409A-3(i)(5).

vi.    Payment of the severance pay and benefits described in Section 4.e.ii. or 4.e.iv., as applicable, is expressly conditioned on the

Executive’s execution without revocation of the separation agreement and general release described therein, within the time period prescribed in
the separation agreement and general release (which release shall include, at the Company’s option, a non-competition obligation during any salary

4

continuation period and (at the Company’s option) a revocation period of seven (7) business days), and will commence immediately following a
sixty (60) day period following the effective date of the Executive’s separation from service from the Company (the “Review Period”) (with the
exception of the pro rata annual bonus payment described in Section 4.e.ii.b., which shall be payable after the bonus funding level is determined
but in no event later than March 15 of the calendar year following the year in which the Executive’s termination occurs). The separation agreement
and general release will be provided to the Executive on or before the fifth (5th) day following such separation from service. If the Executive fails
or refuses to return such agreement within the Review Period, the applicable severance payments and benefits will be forfeited. If the Executive is
eligible for the severance pay and benefits described in Section 4.e.ii., then he shall not be eligible for and shall not receive the severance pay and
benefits described in Section 4.e.iv. Similarly, if the Executive is eligible for the severance pay and benefits described in Section 4.e.iv., then he
shall not be eligible for and shall not receive the severance pay and benefits described in Section 4.e.ii.

5. Nondisclosure, Non-Solicitation and Assignment Agreement. As a condition of the Executive’s employment by the Company and the payment
of compensation and receipt of benefits referred to above, the Executive agrees to continue to be bound by the terms of the standard Nondisclosure, Non-
Solicitation and Assignment Agreement, entered into by the Executive as of 5/2/2008 (the “Nondisclosure Agreement”). The Executive acknowledges that
the Company would not offer him employment or provide compensation and/or benefits set forth above if he was not willing to be bound by the terms of
such Nondisclosure Agreement.

6. Notice.

a.    To the Company. The Executive will send all communications to the Company in writing, addressed as follows (or in any other manner the

Company notifies him to use):

Douglas M. Fambrough III, Ph.D. President and CEO
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

With a copy to:

General Counsel
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

b.    To the Executive. All communications from the Company to the Executive relating to this Agreement shall be sent to the Executive in

writing, at the most recent address on file with the Company.

With a copy to:

Bob D. Brown
57 Grist Mill Road
Littleton, MA 01460

c.    Time Notice Deemed Given. Notice shall be deemed to have been given when delivered or, if earlier (1) three business days after mailing by

United States certified or registered mail, return receipt requested, postage prepaid, or
(2) sent by overnight mail or delivery with confirmation of delivery, in either case, addressed as required in this section.

7. Amendment. No provisions of this Agreement may be modified, waived, or discharged except by a written document signed by a Company officer

duly authorized by the Board and the Executive. A waiver of any conditions or

5

provisions of this Agreement in a given instance shall not be deemed a waiver of such conditions or provisions at any other time in the future.

8. Choice of Law; Forum Selection. The validity, interpretation, construction, and performance of this Agreement shall be governed by the laws of
the Commonwealth of Massachusetts without regard to its conflicts of laws principles. Any claims or legal actions by one party against the other regarding
this Agreement shall be commenced and maintained exclusively in any state or federal court located in the Commonwealth of Massachusetts, and the parties
hereby submit to the jurisdiction and venue of any such court.

9. Successors. This Agreement shall be binding upon, and shall inure to the benefit of, the Executive and his estate, but the Executive may not assign

or pledge this Agreement or any rights arising under it. Without the Executive’s consent, the Company may assign this Agreement to any affiliate or to a
successor to substantially all the business and assets of the Company.

10. Taxes; Code Sections 409A and 280G.

a.    The Company shall withhold taxes from payments it makes pursuant to this Agreement as it reasonably determines to be required by

applicable law.

b.    If the benefits set forth in Section 4.e. of this Agreement constitute “non-qualified deferred compensation” subject to Section 409A, then the

following conditions apply to the payment of such benefits:

i.    Any termination of the Executive’s employment triggering payment of benefits under Section 4.e. must constitute a “separation from

service” under Section 409A(a)(2)(A)(i) of the Code, and Treas. Reg.
§1.409A-1(h) before distribution of such benefits can commence. To the extent that the termination of the Executive’s employment does not
constitute a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h) (as the result of further services that
are reasonably anticipated to be provided by the Executive to the Company at the time the Executive’s employment terminates), any benefits
payable under Section 4.e. that constitute non-qualified deferred compensation under Section 409A shall be delayed until after the date of a
subsequent event constituting a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h). For purposes of
clarification, this Section shall not cause any forfeiture of benefits on the Executive’s part, but shall only act as a delay until such time as a
“separation from service” occurs.

ii.    If the Executive is a “specified employee” (as that term is used in Section 409A and regulations and other guidance issued thereunder) on
the date his separation from service becomes effective, any benefits payable under Section 4.e. that constitute non-qualified deferred compensation
subject to Section 409A shall be delayed until the earlier of: (A) the business day following the six-month anniversary of the date his separation
from service becomes effective, or (B) the date of the Executive’s death, but only to the extent necessary to avoid the adverse tax consequences
and penalties under Section 409A. On the earlier of: (A) the business day following the six-month anniversary of the date his separation from
service becomes effective, or (B) the Executive’s death, the Company shall pay the Executive in a lump sum the aggregate value of the non-
qualified deferred compensation that the Company otherwise would have paid the Executive prior to that date under Section 4.e.

iii.    If any amount to be paid to the Executive pursuant to this Agreement is “deferred compensation” subject to Section 409A, then each
such payment which is conditioned upon Executive’s execution of a release and which is to be paid or provided during a designated period that
begins in one taxable year and ends in a second taxable year, shall be paid or provided in the later of the two taxable years.

iv.    It is intended that each installment of the payments and benefits provided under Section 4.e. shall be treated as a separate “payment” for

purposes of Section 409A.

v.    Neither the Company nor the Executive shall have the right to accelerate or defer the delivery of any such payments or benefits except to

the extent specifically permitted or required by Section 409A.

c.    Notwithstanding any other provision of this Agreement to the contrary, in the event of any ambiguity in the terms of this Agreement, such

term(s) shall be interpreted and at all times administered in a manner that avoids the
inclusion of compensation in income under Section 409A, or the payment of increased taxes, excise taxes or other penalties under Section 409A.

6

d.    The parties intend this Agreement to be in compliance with Section 409A. Executive acknowledges and agrees that Company does not

guarantee the tax treatment or tax consequences associated with any payment or benefit arising under this Agreement, including but not limited to
consequences related to Section 409A.

e.    If any payment or benefit the Executive would receive under this Agreement, when combined with any other payment or benefit Executive

receives pursuant to a Change of Control (whether under this Agreement or otherwise) (such payment or benefit, for purposes of this section, a “Payment”)
would: (i) constitute a “parachute payment” within the meaning of Section 280G of the Code; and (ii) but for this sentence, be subject to the excise tax
imposed by Section 4999 of the Code (the “Excise Tax”), then such Payment shall be either: (A) the full amount of such Payment; or (B) such lesser amount
as would result in no portion of the Payment being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal,
state and local employments taxes, income taxes, and the Excise Tax, results in Executive’s receipt, on an after-tax basis, of the greater amount of the
Payment notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. The Payments will be reduced in the following order:
(A) reduction of any cash severance payments otherwise payable to the Executive that are exempt from Section 409A of the Code;
(B) reduction of any other cash payments or benefits otherwise payable to the Executive that are exempt from Section 409A of the Code, but excluding any
payments attributable to any acceleration of vesting or payments with respect to any equity awards that are exempt from Section 409A of the Code; (C)
reduction of any other payments or benefits otherwise payable to the Executive on a pro-rata basis or such other manner that complies with Section 409A of
the Code, but excluding any payments attributable to any acceleration of vesting and payments with respect to any equity awards that are exempt from
Section 409A of the Code; and (D) reduction of any payments attributable to any acceleration of vesting or payments with respect to any equity awards that
are exempt from Section 409A of the Code, in each case beginning with payments that would otherwise be made last in time.

11. Validity. The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other

provision of this Agreement, which shall remain in full force and effect.

12. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of which

together shall constitute the same instrument.

13.

Entire Agreement; Prior Agreements. This Agreement constitutes the entire agreement among the parties with respect to the subject matter

hereof and, unless otherwise provided herein, supersedes all prior agreements, negotiations or understandings, written or oral, in respect thereof.

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Date:    2/21/2020 /s/ Douglas M. Fambrough III, PhD.

By: Douglas M. Fambrough III, Ph.D.
Its: President and CEO

Date:    2/21/2020 /s/ Bob D. Brown.

Bob D. Brown
EVP Research & Development and CSO

8

Exhibit 10.32

February 21, 2020

Douglas M. Fambrough, III, Ph.D.

Re:    Amendment to Employment Agreement

Dear Mr. Fambrough:

This letter agreement (the “Amendment”) by and between yourself and Dicerna Pharmaceuticals, Inc. (the “Company”) is
intended to amend that certain Amended and Restated Employment Agreement between you and the Company, dated July 8, 2016
(the “Agreement”). This Amendment is effective as of February 25, 2020. Capitalized terms used, but not defined herein shall have
the meanings given to such terms in the Agreement.

1. Section 4 (e) (ii) (d) of the Agreement is hereby amended and restated in its entirety to read as follows:

(d)

Notwithstanding anything to the contrary in any applicable option agreement or stock-based award agreement, all
time-based stock options and other time-based stock-based awards held by the Executive that are scheduled to vest
within  twelve  (12)  months  following  the  Executive’s  date  of  termination  shall  accelerate  in  full  upon  such
termination and shall be exercisable for three (3) months after the date the Executive ceases to be an employee of the
Company or within the originally prescribed term of the applicable option, whichever is earlier (but not thereafter).

2. Section 4 (e) (v) (d) of the Agreement is hereby amended and restated in its entirety to read as follows:

(d)

Notwithstanding anything to the contrary in any applicable option agreement or stock-based award agreement, all
time-based stock options and other time-based stock-based awards held by the Executive, to the extent unvested as
of immediately prior to the termination shall immediately accelerate and become fully exercisable or nonforfeitable
immediately prior to the consummation of the termination and shall be exercisable for three (3) months after the date
the Executive ceases to be an employee of the Company or within the originally prescribed term of the applicable
option, whichever is earlier (but not thereafter).

3. Except as specifically set forth herein, the Agreement and all of its terms and conditions remain in full force and effect, and
the  Agreement  is  hereby  ratified  and  confirmed  in  all  respects,  except  that  on  or  after  the  date  of  this  Amendment  all
references in the Agreement to “this Agreement,” “hereto,” “hereof,” “hereunder,” or words of like import shall mean the
Agreement as amended by this Amendment.

4.This  Amendment  may  be  executed  in  any  number  of  counterparts,  each  of  which  shall  be  deemed  an  original  and  such

counterparts together shall constitute one and the same instrument.

5.The  validity,  interpretation,  construction,  and  performance  of  this  Amendment  shall  be  governed  by  the  laws  of  the
Commonwealth  of  Massachusetts  without  regard  to  its  conflicts  of  laws  principles.  Any  claims  or  legal  actions  by  one
party against the other regarding this Amendment shall be commenced and maintained in any state or federal court located
in the Commonwealth of Massachusetts, and the parties hereby submit to the jurisdiction and venue of any such court.

6.This  Amendment  shall  be  binding  upon  and  inure  to  the  benefit  of  and  be  enforceable  by  the  respective  successors  and
assigns  of  the  parties  hereto.  The  Agreement,  as  amended  by  this  Amendment,  embodies  the  entire  agreement  and
understanding between the parties hereto and supersedes all prior agreements and understandings relating to the subject
matter hereof.

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Please sign below to acknowledge your acceptance of the terms of this Amendment.

Very truly yours,

DICERNA PHARMACEUTICALS, INC.

By: /s/ J. Kevin Buchi     
Name: J. Kevin Buchi 
Title: Chairman

ACKNOWLEDGED, AND AGREED:

/s/ Douglas Fambrough     
Name: Douglas M. Fambrough, III, Ph.D.

Dated: 2/21/2020

[Signature Page to Employment Agreement Amendment]

EMPLOYMENT AGREEMENT (Revised)

Exhibit 10.33

EMPLOYMENT AGREEMENT (“Agreement”) made this February 21, 2020 (the “Effective Date”) between Dicerna Pharmaceuticals, Inc., a

Delaware corporation (“Company”), on the one hand and Ralf Rosskamp (the “Executive”) on the other hand.

WHEREAS, the Company desires to employ the Executive and the Executive desires to be employed by the Company, on terms set forth herein;

NOW, THEREFORE, in consideration of the mutual agreements set forth herein, the parties agree as follows:

1. Term of Employment. The Executive’s employment under this Agreement shall commence on the Effective Date and shall end on such date as the
Executive’s employment terminates in accordance with Section 4 of this Agreement. Subject to the balance of this Agreement, the Executive shall be an at-
will employee of the Company whose employment may be terminated (by the Company or by the Executive) at any time, for any or no reason, in which
case the Executive will be entitled to the separation benefits set forth in Section 4, below.

2. Duties. During his employment with the Company, the Executive shall have the title of Chief Medical Officer. The Executive shall devote his full

business time and effort to the performance of his duties for the Company, which he shall perform faithfully and to the best of his ability. The Executive
shall have all of the customary powers and duties associated with his position and shall be subject to the Company’s policies, procedures, and approval
practices, as generally in effect from time to time for all senior executives of the Company and the direction and oversight of the Board. The Executive will
report directly to the Chief Executive Officer of the Company.

3. Compensation and Related Matters.

a.    Base Salary. The Company shall pay the Executive base salary at a rate of $19,788 paid twice monthly (which annualizes to $474,908), less

withholdings and deductions required and/or permitted by law. The Executive’s base salary shall be paid in conformity with the Company’s payroll practices
generally applicable to the Company’s senior executives.

b.    Signing and Annual Bonus. The Company paid the Executive a one-time signing bonus (the “Signing Bonus”) of $100,000 (less applicable

withholding taxes and deductions) payable within 30 days of the Executive’s start date at the Company. The Signing Bonus is subject to the following
repayment obligations: as a condition of the Executive’s employment with the Company and for receiving the Signing Bonus, the Executive agrees that if, at
any time during the twelve months following the Executive’s first date of employment with the Company, the Executive (a) resigns his employment with the
Company, he shall repay the Signing Bonus, on a pro-rata basis based on length of service; or
(b) the Company terminates the Executive’s employment for Cause, he shall repay the Signing Bonus in-full, and in all cases specifically authorize the
Company to deduct all of the Signing Bonus required to be repaid from his last paycheck and to the extent that there is a balance still owed by the
Executive, he will provide payment of such balance within thirty days (30) of his last date of employment. The Executive shall be eligible to be considered
for an Annual Bonus upon achieving of certain pre-determined performance targets consistent with any Incentive Compensation Plan established by the
Compensation Committee (the “Committee”). The Annual Bonus shall be based, in part, on the Executive’s performance. The grant of such a bonus shall be
in the sole discretion of the Committee. The maximum bonus amount for which the Executive will be eligible is forty percent (40%) of base salary earned
for the calendar year, provided that, the Annual Bonus for the first year of employment shall be prorated based on the date of hire. The Annual Bonus will be
earned only after it has been granted by the Committee. The Annual Bonus shall be paid to the Executive following the close of the fiscal year to which it
relates, in no event later than March 15th of the calendar year immediately following the calendar year in which it was earned. The Executive must be
actively employed by the Company at the time the Committee considers granting of bonuses to be eligible to receive such bonus.

1

c.    Equity Compensation. Subject to approval of the Board or an appropriate committee thereof, Executive shall be eligible for equity
compensation awards, in such amounts and subject to such terms as shall be commensurate with awards granted to other senior executives of the Company.

d. Benefits. During his employment with the Company, the Executive shall be entitled to participate in all

employee benefit plans and programs, including paid sick leave and holidays, life insurance, disability, medical, dental, and retirement savings plans, to the
same extent generally available to senior executives of the Company, in accordance with the terms of those plans and programs. The Executive shall be
permitted up to four weeks of paid vacation per year, which will accrue on a monthly basis. The Executive will not be allowed to accumulate more than
three weeks of unused vacation days at any given time. The Executive may carry over a maximum of ten unused vacation days from one calendar year to the
next.

e.    Expenses. The Company agrees to reimburse the Executive for reasonable out-of-pocket expenses incurred in connection with Company
business and within standards to be established by the Board from time to time, including, without limitation, travel and accommodations for authorized
business trips, provided vouchers therefor, or other supporting information as the Company may reasonably require, are presented to the Company. All
reimbursements provided under this Agreement shall be made or provided in accordance with the requirements of Section 409A of the Internal Revenue
Code of 1986, as amended (the “Code”) and the rules and regulations thereunder (“Section 409A”) including, where applicable, the requirement that (i) any
reimbursement is for expenses incurred during the Executive’s lifetime (or during a shorter period of time specified in this Agreement); (ii) the amount of
expenses eligible for reimbursement during a calendar year may not affect the expenses eligible for reimbursement in any other calendar year; (iii) the
reimbursement of an eligible expense shall be made no later than the last day of the calendar year following the year in which the expense is incurred; and
(iv) the right to reimbursement or in kind benefits is not subject to liquidation or exchange for another benefit.

4. Termination

a.    Rights and Duties. The Executive is an employee “at will.” Accordingly, the Company or the Executive may terminate his employment, at

any time with or without cause, for any lawful reason, or no reason. The Executive and the Company agree that, without modifying or altering the
Executive’s “at will” status, each will provide the other with at least thirty (30) days’ prior written notice of termination of the Executive’s employment with
the Company. If the Executive gives notice of termination, except in the case of a termination by the Executive for “Good Reason” as set forth below, such
notice will be deemed a voluntary resignation by the Executive and the Company, in its sole discretion, may elect to relieve the Executive of any obligation
to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s employment, without changing
the status of such termination as a voluntary resignation by the Executive. Should the Company in the event of a voluntary resignation decide to relieve the
Executive of any obligation to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s
employment, it shall nonetheless continue his compensation and benefits for the term of the notice period, except that no bonus shall be earned or awarded
during and after the notice period.

b.    Termination for “Good Reason.” The Executive may terminate his employment at any time for “Good Reason.” “Good Reason” shall

comport with the requirements of Regulation §1.409A-l(n)(2)(ii) and shall mean:

i. A material diminution in the Executive’s authority, duties, responsibilities or reporting responsibilities;

ii.    A material diminution by the Company of the Executive’s annual base compensation then in effect, except a material diminution

generally affecting the members of the Company’s management;

iii.    Any action or inaction by the Company that constitutes a material breach by the Company of the terms of this Agreement; or

iv.    A requirement that the Executive be based more than 50 miles from the offices at which he was principally employed immediately prior

to the date of termination.

The parties acknowledge and agree that “Good Reason” shall not be deemed to have occurred unless: (1) the Executive provides the Company with
written notice that he intends to terminate his employment hereunder for one of the Good Reason grounds set forth in Section 4.b. within sixty (60) days of
the initial occurrence of such ground, with such notice containing a description of such ground, (2) if such Good Reason ground is capable of being cured,
the Company has failed to cure such ground within a period of thirty (30) days from the date of such written notice, and (3) the

2

Executive terminates his employment within ninety-one (91) days from the date that such Good Reason ground first occurs. For purposes of clarification,
the above-listed conditions shall apply separately to each occurrence of a Good Reason ground, and failure to adhere to such conditions in the event of the
occurrence of grounds that would otherwise have constituted Good Reason had the conditions herein been satisfied shall not disqualify the Executive from
asserting and satisfying the conditions for Good Reason for any subsequent occurrence that may constitute Good Reason.

c.    Termination by the Company for Cause. The Company may terminate the Executive’s employment at any time for “Cause.” “Cause” shall

mean:

i.    The Executive’s commission of an act of fraud, dishonesty, breach of fiduciary duty or misappropriation which may or does adversely

affect the Company;

ii.    The Executive’s conviction or plea of guilty or nolo contendere to or engaging in any felony or crime involving moral turpitude, fraud,
misrepresentation or other crime and/or indictment for a crime that, in the reasonable opinion of the Company, affects the Executive’s ability to
perform the duties set forth in this Agreement and/or reflects negatively upon the Company;

iii.    Unauthorized disclosure by the Executive of the Company’s Proprietary Information, as defined in the Nondisclosure Agreement (as

defined in Section 5 below), which results or could have been reasonably foreseen to result, in a material financial loss to the Company;

iv.    The Executive’s material breach of this Agreement or the Nondisclosure Agreement; provided, that if such breach is reasonably possible

of being cured in the opinion of the Company, then the Executive will be given thirty (30) days after written notice from the Company of such
breach to cure; or

v.    The Executive’s failure (which shall not include any Disability as defined below) or refusal to perform the duties and responsibilities of

his employment and/or to follow the policies and procedures of the Company, including without limitation the failure or refusal to carry out lawful
instructions from the Board. If such failure or refusal is reasonably possible of being cured in the opinion of the Company, then the Executive will
be given thirty (30) days after written notice from the Company of such failure or refusal to cure.

d.    Termination in the Event of Death or Disability. The Agreement shall terminate upon the Executive’s death or Disability, and the
Executive’s employment with the Company shall thereupon terminate. For purposes of the Agreement, “Disability” is defined as any illness, injury, accident
or condition of either a physical or psychological nature as a result of which the Executive is unable to perform the essential functions of his duties and
responsibilities hereunder for 90 days during any period of 365 consecutive calendar days or for any consecutive 90-day period.

e. Effect of Termination.

i.    If the Executive is terminated by the Company for Cause, or by the Executive voluntarily other than for Good Reason, then the Executive

will only be entitled to payment when due of any unpaid base salary, expense reimbursements, and vacation days accrued but unused prior to
termination of employment.

ii.    If the Executive’s employment is terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability,

or by the Executive for Good Reason (each of which will be deemed an involuntary termination), then the Executive will be entitled to payment
when due of any unpaid base salary, expense reimbursements, and vacation days accrued prior to termination of employment and, in exchange for
the Executive’s execution of a separation agreement and general release provided by the Company (including, at the Company’s option, a non-
competition obligation during any salary continuation period and (at the Company’s option) a revocation period of seven (7) business days) and
expressly subject to the conditions described in Section 4.e.vi. below, the following:

a)    Continuation of the Executive’s base salary at the rate in effect as of the day immediately preceding his date of termination for a
twelve (12) month period, payable in accordance with the Company’s regular payroll practices, less applicable withholdings, commencing at
the conclusion of the Review Period (as described below), provided that the first installment of such payments shall include all amounts
which would have been paid during the period between the Executive’s date of termination and the date of such first installment;

b)    Payment of a pro-rata portion of the actual amount of the Executive’s Annual Bonus based on actual performance determined

under the terms of the Company’s annual bonus program as then in effect,

3

with such pro-rata portion calculated by multiplying the actual amount of such bonus for the year in which such termination occurs by a
number: (x) the numerator of which is the number of days worked by the Executive during the fiscal year prior to termination, and (y) the
denominator of which is three hundred sixty five (365), with such payment to be made after the determination of the bonus funding level
(but in no event later than March 15 of the calendar year following the year in which the Executive’s termination occurs); and

c)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) twelve (12) months or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for premium payments for continuation of
such group health insurance coverage pursuant to the terms and conditions of COBRA.

iii.    If the Agreement is terminated because of the Executive’s death, the Company shall pay to the estate of the Executive the salary and

benefits which would otherwise have been payable to the Executive up to the date of termination of his employment because of death.

iv.    In the event of a Change of Control (as defined below) occurs and, if within one (1) year thereafter, the Executive’s employment is
terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability, or by the Executive for Good Reason (each
of which will be deemed an involuntary termination), then the Executive will be entitled to payment when due of any unpaid base salary, expense
reimbursements, and vacation days accrued prior to termination of employment and, in exchange for the Executive’s execution of a separation
agreement and general release provided by the Company (including, at the Company’s option, a non-competition obligation during any salary
continuation period and (at the Company’s option) a revocation period of seven (7) business days) and expressly subject to the conditions
described in Section 4.e.vi. below, the following:

a)    A lump sum payment equal to the sum of (i) one (1) year of the Executive’s base salary at the rate in effect as of the day
immediately preceding his date of termination, less applicable withholdings, plus (ii) the Executive’s target annual bonus for the year in
which the termination occurs, less applicable withholdings, payable at the conclusion of the Review Period (as described below);

b)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) one (1) year or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for premium payments for continuation of
such group health insurance coverage pursuant to the terms and conditions of COBRA; and

c)    Payment of a pro-rata portion of the target amount of the Executive’s annual bonus, with such pro-rata portion calculated by
multiplying the target amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the
number of days worked by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three hundred sixty
five (365), with such payment to be made at the conclusion of the Review Period (but in no event later than March 15 of the calendar year
following the year in which the Executive’s termination occurs).

v.     In addition, in the event of a Change of Control, notwithstanding anything to the contrary in any applicable option agreement or stock-
based award agreement, all time-based stock options and other time-based stock-based awards held by the Executive, to the extent unvested as of
immediately prior to the Change of Control shall immediately accelerate and become fully exercisable or nonforfeitable immediately prior to the
consummation of the Change of Control.

For purposes of this Agreement, “Change of Control” means (A) the occurrence of a merger or consolidation of the Company whether or not

approved by the Board, other than (i) a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior
thereto continuing to represent (either by remaining

4

outstanding or by being converted into voting securities of the surviving entity or the parent of such corporation) at least 50% of the total voting power
represented by the voting securities of the Company or such surviving entity or parent of such corporation outstanding immediately after such merger or
consolidation, or (ii) a merger or consolidation which is in effect a financing transaction for the Company, including, but not limited to, a reverse merger of
the Company into a publicly traded “shell” company, or (B) the stockholders of the Company approve an agreement for the sale or disposition by the
Company of all or substantially all of the Company’s assets, provided that, in any case, “Change of Control” shall be in accordance with Regulation
§1.409A-3(i)(5).

vi.    Payment of the severance pay and benefits described in Section 4.e.ii. or 4.e.iv., as applicable, is expressly conditioned on the

Executive’s execution without revocation of the separation agreement and general release described therein, within the time period prescribed in
the separation agreement and general release (which release shall include, at the Company’s option, a non-competition obligation during any salary
continuation period and (at the Company’s option) a revocation period of seven (7) business days), and will commence immediately following a
sixty (60) day period following the effective date of the Executive’s separation from service from the Company (the “Review Period”) (with the
exception of the pro rata annual bonus payment described in Section 4.e.ii.b., which shall be payable after the bonus funding level is determined
but in no event later than March 15 of the calendar year following the year in which the Executive’s termination occurs). The separation agreement
and general release will be provided to the Executive on or before the fifth (5th) day following such separation from service. If the Executive fails
or refuses to return such agreement within the Review Period, the applicable severance payments and benefits will be forfeited. If the Executive is
eligible for the severance pay and benefits described in Section 4.e.ii., then he shall not be eligible for and shall not receive the severance pay and
benefits described in Section 4.e.iv. Similarly, if the Executive is eligible for the severance pay and benefits described in Section 4.e.iv., then he
shall not be eligible for and shall not receive the severance pay and benefits described in Section 4.e.ii.

5. Nondisclosure, Non-Solicitation and Assignment Agreement. As a condition of the Executive’s employment by the Company and the payment
of compensation and receipt of benefits referred to above, the Executive agrees to continue to be bound by the terms of the standard Nondisclosure, Non-
Solicitation and Assignment Agreement, entered into by the Executive as of 5/12/2017 (the “Nondisclosure Agreement”). The Executive acknowledges
that the Company would not offer him employment or provide compensation and/or benefits set forth above if he was not willing to be bound by the terms
of such Nondisclosure Agreement.

6. Notice.

a.    To the Company. The Executive will send all communications to the Company in writing, addressed as follows (or in any other manner the

Company notifies him to use):

Douglas M. Fambrough III, Ph.D. President and CEO
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

With a copy to:

General Counsel
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

b.    To the Executive. All communications from the Company to the Executive relating to this Agreement shall be sent to the Executive in

writing, at the most recent address on file with the Company.

With a copy to:

5

Ralf Rosskamp
270 Third Street #701
Cambridge, MA 02142

c.    Time Notice Deemed Given. Notice shall be deemed to have been given when delivered or, if earlier (1) three business days after mailing by

United States certified or registered mail, return receipt requested, postage prepaid, or
(2) sent by overnight mail or delivery with confirmation of delivery, in either case, addressed as required in this section.

7. Amendment. No provisions of this Agreement may be modified, waived, or discharged except by a written document signed by a Company officer

duly authorized by the Board and the Executive. A waiver of any conditions or provisions of this Agreement in a given instance shall not be deemed a
waiver of such conditions or provisions at any other time in the future.

8. Choice of Law; Forum Selection. The validity, interpretation, construction, and performance of this Agreement shall be governed by the laws of
the Commonwealth of Massachusetts without regard to its conflicts of laws principles. Any claims or legal actions by one party against the other regarding
this Agreement shall be commenced and maintained exclusively in any state or federal court located in the Commonwealth of Massachusetts, and the parties
hereby submit to the jurisdiction and venue of any such court.

9. Successors. This Agreement shall be binding upon, and shall inure to the benefit of, the Executive and his estate, but the Executive may not assign

or pledge this Agreement or any rights arising under it. Without the Executive’s consent, the Company may assign this Agreement to any affiliate or to a
successor to substantially all the business and assets of the Company.

10. Taxes; Code Sections 409A and 280G.

a.    The Company shall withhold taxes from payments it makes pursuant to this Agreement as it reasonably determines to be required by

applicable law.

b.    If the benefits set forth in Section 4.e. of this Agreement constitute “non-qualified deferred compensation” subject to Section 409A, then the

following conditions apply to the payment of such benefits:

i.    Any termination of the Executive’s employment triggering payment of benefits under Section 4.e. must constitute a “separation from

service” under Section 409A(a)(2)(A)(i) of the Code, and Treas. Reg.
§1.409A-1(h) before distribution of such benefits can commence. To the extent that the termination of the Executive’s employment does not
constitute a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h) (as the result of further services that
are reasonably anticipated to be provided by the Executive to the Company at the time the Executive’s employment terminates), any benefits
payable under Section 4.e. that constitute non-qualified deferred compensation under Section 409A shall be delayed until after the date of a
subsequent event constituting a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h). For purposes of
clarification, this Section shall not cause any forfeiture of benefits on the Executive’s part, but shall only act as a delay until such time as a
“separation from service” occurs.

ii.    If the Executive is a “specified employee” (as that term is used in Section 409A and regulations and other guidance issued thereunder) on
the date his separation from service becomes effective, any benefits payable under Section 4.e. that constitute non-qualified deferred compensation
subject to Section 409A shall be delayed until the earlier of: (A) the business day following the six-month anniversary of the date his separation
from service becomes effective, or (B) the date of the Executive’s death, but only to the extent necessary to avoid the adverse tax consequences
and penalties under Section 409A. On the earlier of: (A) the business day following the six-month anniversary of the date his separation from
service becomes effective, or (B) the Executive’s death, the Company shall pay the Executive in a lump sum the aggregate value of the non-
qualified deferred compensation that the Company otherwise would have paid the Executive prior to that date under Section 4.e.

iii.    If any amount to be paid to the Executive pursuant to this Agreement is “deferred compensation” subject to Section 409A, then each
such payment which is conditioned upon Executive’s execution of a release and which is to be paid or provided during a designated period that
begins in one taxable year and ends in a second taxable year, shall be paid or provided in the later of the two taxable years.

6

iv.    It is intended that each installment of the payments and benefits provided under Section 4.e. shall be treated as a separate “payment” for

purposes of Section 409A.

v.    Neither the Company nor the Executive shall have the right to accelerate or defer the delivery of any such payments or benefits except to

the extent specifically permitted or required by Section 409A.

c.    Notwithstanding any other provision of this Agreement to the contrary, in the event of any ambiguity in the terms of this Agreement, such

term(s) shall be interpreted and at all times administered in a manner that avoids the
inclusion of compensation in income under Section 409A, or the payment of increased taxes, excise taxes or other penalties under Section 409A.

d.    The parties intend this Agreement to be in compliance with Section 409A. Executive acknowledges and agrees that Company does not

guarantee the tax treatment or tax consequences associated with any payment or benefit arising under this Agreement, including but not limited to
consequences related to Section 409A.

e.    If any payment or benefit the Executive would receive under this Agreement, when combined with any other payment or benefit Executive

receives pursuant to a Change of Control (whether under this Agreement or otherwise) (such payment or benefit, for purposes of this section, a “Payment”)
would: (i) constitute a “parachute payment” within the meaning of Section 280G of the Code; and (ii) but for this sentence, be subject to the excise tax
imposed by Section 4999 of the Code (the “Excise Tax”), then such Payment shall be either: (A) the full amount of such Payment; or (B) such lesser amount
as would result in no portion of the Payment being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal,
state and local employments taxes, income taxes, and the Excise Tax, results in Executive’s receipt, on an after-tax basis, of the greater amount of the
Payment notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. The Payments will be reduced in the following order:
(A) reduction of any cash severance payments otherwise payable to the Executive that are exempt from Section 409A of the Code;
(B) reduction of any other cash payments or benefits otherwise payable to the Executive that are exempt from Section 409A of the Code, but excluding any
payments attributable to any acceleration of vesting or payments with respect to any equity awards that are exempt from Section 409A of the Code; (C)
reduction of any other payments or benefits otherwise payable to the Executive on a pro-rata basis or such other manner that complies with Section 409A of
the Code, but excluding any payments attributable to any acceleration of vesting and payments with respect to any equity awards that are exempt from
Section 409A of the Code; and (D) reduction of any payments attributable to any acceleration of vesting or payments with respect to any equity awards that
are exempt from Section 409A of the Code, in each case beginning with payments that would otherwise be made last in time.

11. Validity. The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other

provision of this Agreement, which shall remain in full force and effect.

12. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of which

together shall constitute the same instrument.

13.

Entire Agreement; Prior Agreements. This Agreement constitutes the entire agreement among the parties with respect to the subject matter

hereof and, unless otherwise provided herein, supersedes all prior agreements, negotiations or understandings, written or oral, in respect thereof.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

7

Date:    2/21/2020 /s/ Douglas M. Fambrough III, PhD.

DICERNA PHARMACEUTICALS, INC.

By: Douglas M. Fambrough III, Ph.D.
Its: President and CEO

Date:    2/26/2020 /s/ Ralf Rosskamp

Ralf Rosskamp
Chief Medical Officer

8

CERTAIN INFORMATION IDENTIFIED BY BRACKETED ASTERISKS ([* * *]) HAS BEEN OMITTED FROM THIS EXHIBIT
BECAUSE IT IS BOTH NOT MATERIAL AND WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY DISCLOSED.

Exhibit 10.46 

EXECUTION COPY
Confidential

Collaboration and License Agreement

This Agreement, dated as of October 30, 2019, is entered into by and between

F. Hoffmann-La Roche Ltd
with an office and place of business at Grenzacherstrasse 124, 4070 Basel, Switzerland ("Roche Basel")

and

Hoffmann-La Roche Inc.
with an office and place of business at 150 Clove Road, Suite 8, Little Falls, New Jersey 07424, U.S.A. ("Roche US"; Roche Basel
and Roche US together referred to as "Roche")

on the one hand

Dicerna Pharmaceuticals, Inc.
with an office and place of business at 33 Hayden Avenue, Lexington, Massachusetts 02421, U.S.A. ("Dicerna")

on the other hand.

and

1.Definitions    1

Table of Contents

1.1Accounting Standard    1
1.2Additional Dicerna Compound    1
1.3Affiliate    2
1.4Agreement    2
1.5Agreement Term    2
1.6Applicable Law    2
1.7Available Target    2
1.8Biosimilar Product    2
1.9Business Day    3
1.10Calendar Quarter    3
1.11Calendar Year    3
1.12cGLP    3
1.13Change of Control    3
1.14Change of Control Group    3
1.15Clinical Candidate    4
1.16Clinical Study    4
1.17Combination Product    4
1.18Commercialization    4
1.19Commercialization Plan    4
1.20Commercially Reasonable Efforts    4
1.21Committee    5
1.22Companion Diagnostic    5
1.23Competitor    5
1.24Complete or Completion    5
1.25Composition of Matter Claim    5
1.26Compound    6
1.27Compulsory Sublicense Compensation    6
1.28Confidential Information    6
1.29Continuation Election Notice    6
1.30Control    6
1.31Co-Promotion Exercise Period    7
1.32Co-Promotion Product    7
1.33Co-Promotion Territory    7
1.34Cost of Manufacture    7
1.35Cover    7
1.36CTA    7
1.37Detail    8
1.38Development    8
1.39Development Costs    8
1.40Development Plan    9
1.41Dicerna Base Patent Rights    9
1.42Dicerna Compound    9

1.43Dicerna GalXC Platform Patent Rights    9
1.44Dicerna Phase I Study    9
1.45Directed To    9
1.46Discontinued Target    10
1.47Effective Date    10
1.48EMA    10
1.49Encumbered Combination Agent    10
1.50Encumbered Combination Indication    10
1.51EU    10
1.52Excluded Claim    10
1.53Excluded Dicerna Patent Right    10
1.54Exclusivity Period    10
1.55Ex-Limited Licensee    11
1.56Expert    11
1.57Extraordinary Event    11
1.58FDA    11
1.59FDCA    11
1.60Field    11
1.61Filing    11
1.62Finalized    11
1.63First Commercial Sale    11
1.64FTE    12
1.65FTE Costs    12
1.66Gatekeeper    12
1.67Gatekeeper Process    12
1.68GalXC Molecule    12
1.69GalXC Platform    12
1.70GalXC Platform Improvements    12
1.71Genentech    12
1.72Genentech Patent Right    12
1.73Generic Product    13
1.74Handle    13
1.75HBV    13
1.76Host Cell Factor Target    13
1.77Hybrid Product    13
1.78IFRS    13
1.79Improvement    13
1.80Initiation    14
1.81Initiation of GLP Tox Study    14
1.82Insolvency Event    14
1.83Internal Revenue Code    14
1.84Invention    14
1.85Joint Know-How    14
1.86Joint Patent Rights    14
1.87JOT    14
1.88JRC    14
1.89JSC    14

1.90Know-How    15
1.91Lead Compound    15
1.92Lead Product    15
1.93Licensed IP    15
1.94Licensed Product    15
1.95Like-Substance Product    15
1.96Limited Field    15
1.97MAA    15
1.98Major Markets    15
1.99Marketing Study    15
1.100Materials    16
1.101Manufacture    16
1.102Medical Affairs Activities    16
1.103Method of Use Claim    16
1.104Net Sales    16
1.105Non-Compound Active Agent    17
1.106Not Available Target    17
1.107Party    17
1.108Patent Rights    17
1.109Pharmacovigilance Agreement    17
1.110Phase I Study    17
1.111Phase II Study    17
1.112Phase III Study    18
1.113Phase IV Study    18
1.114Pivotal Study    18
1.115PN Field Restriction    18
1.116Post-Approval Commitment Study    18
1.117Product    18
1.118Product Labeling or Product Label    18
1.119R&D Collaboration Term    18
1.120Regulatory Approval    18
1.121Regulatory Authority    19
1.122Regulatory Exclusivity    19
1.123Regulatory Expenses    19
1.124Regulatory Materials    19
1.125Research Plan    19
1.126Reserved Target    19
1.127Roche Background Improvements    20
1.128Roche Compound    20
1.129Roche Grant-Back Patent Rights    20
1.130Roche Group    20
1.131Roche Patent Rights    20
1.132Roche Product    20
1.133Royalty Term    20
1.134Sales    21
1.135Sales Representative    22
1.136Selected Target    22

1.137Selected Target Compound    22
1.138Selected Target Product    22
1.139Specific Patent Right    22
1.140Signature Date    22
1.141Sublicensee    22
1.142Target Nomination Deadline    22
1.143Target Term    23
1.144Territory    23
1.145Third Party    23
1.146Transfer Activities    23
1.147Transfer Compound    23
1.148Transfer Plan    23
1.149US    24
1.150US$    24
1.151Valid Claim    24
1.152Viral Target    24
1.153Additional Definitions    24

2.Grant of License    26

2.1Research Cross License    26
2.2Commercial License    26
2.3Non-Exclusive Roche License    27
2.4Sublicenses    27
2.5License Limitation    28
2.6Freedom-to-operate Licenses    28

3.R&D Collaboration    29
3.1Initiation    29
3.2Selected Target Nomination    29
3.3Scope    30
3.4Research Plans    30
3.5Information Exchange    30
3.6Replacement and Reserved Targets    31
3.7Gatekeeper Process    31
3.8Compound Progression    33
3.9Exclusivity    34
3.10Research Plan Costs of Performance    34

4.Diligence    34
5.Lead Transfer Activities    35
6.Development    35

6.1Development of Lead Product by Dicerna through Dicerna Phase I Study    35
6.2Development by Roche    36
6.3Dicerna Cost Share Option    36
6.4Updates    38

7.Governance    38

7.1Joint Research Committee    38
7.2Joint Steering Committee    39
7.3Members    39
7.4Meetings    39

7.5Minutes    39
7.6Responsibilities of the JRC    40
7.7JRC Decisions    41
7.8JSC Responsibilities and Decision Making for Shared Product Development    41
7.9JSC Responsibilities and Decision Making for Co-Promotion Products    42
7.10JSC Responsibilities for Roche Sole Development/Commercialization of Lead Product and Hybrid Product    43
7.11Joint Operational Teams    43
7.12Alliance Director    44
7.13Limitations of Authority    44
7.14Expenses    44
7.15Lifetime of JRC and JSC    44

8.Manufacture and Supply    44

8.1Dicerna Phase I Study    44
8.2R&D Collaboration    45
8.3Roche Responsibilities    45
8.4Transfer Activities for Manufacturing    45

9.Regulatory    46

9.1Dicerna Responsibility    46
9.2Transfer to Roche    47
9.3Roche Responsibility    47
9.4Reporting Adverse Events    47

10.Commercialization    48
10.1Generally    48
10.2Booking of Sales; Distribution    48
10.3Updates other than Co-Promotion Products in the Co-Promotion Territory    48
10.4Product Trademarks    48
10.5Product Labeling; Markings and Co-Branding    49
10.6Dicerna US Co-Promotion Option    49
10.7Medical Affairs    51
11.Payments to Dicerna    51

11.1Upfront License Fee for Lead Compound and Selected Targets    51
11.2Development and Regulatory Event Payments    51
11.3Sales Based Events    54
11.4Royalty Payments    54
11.5Disclosure of Payments    58

12.Accounting and reporting    59
12.1Timing of Payments    59
12.2Late Payment    59
12.3Method of Payment    59
12.4Currency Conversion    59
12.5Blocked Currency    59
12.6Reporting    59

13.Taxes    60

13.1Income Taxes    60
13.2Withholding Taxes    60
13.3Foreign-Derived Deduction Eligible Income Reporting    61

13.4No Partnership for Tax Purposes    61
13.5Value Added Tax    61

14.Auditing    61

14.1Dicerna Right to Audit    61
14.2Audit Reports    62
14.3Over-or Underpayment    62

15.Intellectual Property    62

15.1Ownership of Inventions    62
15.2Trademarks    63
15.3Prosecution    63
15.4Patent Coordination Team    64
15.5CREATE Act    64
15.6Infringement    64
15.7Defense    66
15.8Hatch-Waxman    66
15.9Patent Term Extensions    66
15.10Costs of Patent Challenge    67

16.Representations, Warranties and Covenants    67

16.1Dicerna Representations, Warranties and Covenants    67
16.2Roche Representations, Warranties and Covenants    69
16.3Mutual Representations and Warranties    71
16.4No Other Representations and Warranties    71

17.Indemnification    71

17.1Indemnification by Roche    71
17.2Indemnification by Dicerna    71
17.3Procedure    72

18.Liability    72

18.1Limitation of Liability    72

19.Obligation Not to Disclose Confidential Information    72

19.1Non-Use and Non-Disclosure    72
19.2Permitted Disclosure    72
19.3Press Releases    72
19.4Publications    73
19.5Commercial Considerations    73
19.6Injunctive Relief    74
20.Term and Termination    75

20.1Commencement and Term    75
20.2Termination    75
20.3Consequences of Termination    77
20.4Survival    84

21.Bankruptcy    84
22.Miscellaneous    84

22.1Governing Law; Excluded Claims    84
22.2Disputes    85
22.3Arbitration    85
22.4HSR    86
22.5Assignment    87

22.6Debarment    87
22.7Independent Contractor    87
22.8Unenforceable Provisions and Severability    87
22.9Waiver    87
22.10Interpretation    88
22.11Entire Understanding    88
22.12Amendments    88
22.13Invoices    89
22.14Notice    89
22.15Force Majeure    90
22.16Further Assurances    90
22.17Compliance with Laws    90
22.18Export    90
22.19No Third Party Beneficiary Rights    90
22.20Counterparts; Electronic Signatures    91

Collaboration and License Agreement

WHEREAS,  Dicerna  is  the  owner  of  a  proprietary  RNAi  technology  platform  designated  as  GalXCTM  which  advances  the
development of next-generation RNAi-based therapies that act by silencing disease-driving genes in the liver;

WHEREAS, Dicerna has utilized the GalXCTM platform to create potential RNAi therapies for treating hepatitis B virus including a
lead molecule currently in a Phase I clinical study;

WHEREAS, Roche has expertise in the research, development, manufacture and commercialization of pharmaceutical products
and has an active program in the discovery and development of oligonucleotide therapeutics intended for the treatment of hepatitis
B virus;

WHEREAS,  Roche  and  Dicerna  wish  to  collaborate  in  the  research  and  development  of  oligonucleotide  therapeutics  for  the
treatment of hepatitis B virus;

WHEREAS, Roche desires to commercialize such therapeutics, with Dicerna retaining options for (i) the sharing of the costs of
development, in exchange for increased royalty rates for Roche’s sales, of the lead molecule in the United States and (ii) the co-
promotion of the lead compound in the United States; and,

WHEREAS, Dicerna is willing to grant to Roche rights to use certain of its intellectual property rights to make, use, offer for sale,
sell and import and export Compounds and Products (as such terms are respectively defined below), as contemplated herein.

NOW, THEREFORE,  in  consideration  of  the  mutual  covenants  and  promises  contained  in  this  Agreement  and  other  good  and
valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the Parties hereto, intending to be legally
bound, do hereby agree as follows:

1

1. Definitions
As used in this Agreement, the following terms, whether used in the singular or plural, shall have the following meanings:

1.1 Accounting Standard
The  term  “Accounting  Standards”  shall  mean:  (i)  with  respect  to  Roche,  its  Affiliates  or  its  Sublicensee,  either  IFRS  or  United
States  generally  accepted  accounting  principles  (GAAP),  in  either  case,  as  currently  used  at  the  applicable  time  by,  and  as
consistently  applied  by,  such  applicable  entity;  or  (ii)  with  respect  to  Dicerna  or  its  Affiliates,  United  States  generally  accepted
accounting principles (GAAP), as currently used at the applicable time by, and as consistently applied by, such applicable entity.

1.2 Additional Dicerna Compound
The  term  “Additional  Dicerna  Compound”  shall  mean  any  GalXC  Molecule  (a)  arising  out  of  (or  provided  by  either  Party  or  its
Affiliates into) the R&D Collaboration, or any derivative, modification or backup compound thereof, that is Directed To a Selected
Target or (b) that is a derivative, modification or backup compound of the Lead Compound. If a Selected Target is terminated or
becomes a Discontinued Target, Additional Dicerna Compounds Directed To such Selected Target shall only retain the status of
Additional  Dicerna  Compounds  for  purposes  of  the  provisions  of  Article  20  (however  subject  to  Section  20.3.4  in  the  event  of
Compulsory Sublicense or Sublicensee rights).

1.3 Affiliate
The term “Affiliate” shall mean any individual, corporation, association or other business entity that directly or indirectly controls, is
controlled by, or is under common control with the Party in question. As used in this definition of “Affiliate,” the term “control” shall
mean the direct or indirect ownership of more than fifty percent (>50%) of the stock having the right to vote for directors thereof or
the  ability  to  otherwise  control  the  management  of  the  corporation  or  other  business  entity  whether  through  the  ownership  of
voting  securities,  by  contract,  resolution,  regulation  or  otherwise.  Anything  to  the  contrary  in  this  paragraph  notwithstanding,
Chugai  Pharmaceutical  Co.,  Ltd,  a  Japanese  corporation  (“Chugai”)  and/or  its  subsidiaries  (if  any)  shall  not  be  deemed  as
Affiliates of Roche unless Roche provides written notice to Dicerna of its desire to include Chugai and/or its respective subsidiaries
(as applicable) as Affiliate(s) of Roche.

1.4 Agreement
The term “Agreement” shall mean this document including any and all appendices and amendments to it as may be added and/or
amended from time to time in accordance with the provisions of this Agreement.

1.5 Agreement Term
The  term  “Agreement  Term”  shall  mean  the  period  of  time  commencing  on  the  Effective  Date  and,  unless  this  Agreement  is
terminated sooner as provided in Article 20, expiring on a Product-by-Product basis on the date when no royalty or other payment
obligations under this Agreement are or will become due.

1.6 Applicable Law
The term “Applicable Law” shall mean any law, statute, ordinance, code, rule or regulation that has been enacted by a government
authority (including any Regulatory Authority) and is in force as of the Effective Date or comes into force during the Agreement
Term, in each case to the extent that the same is applicable to the performance by the Parties of their respective obligations or the
Parties’ other activities under this Agreement.

1.7 Available Target
The term “Available Target” shall mean, with respect to a given target, the Gatekeeper’s good faith belief that a license to Roche is
available under Patent Rights Controlled by Dicerna for compounds Directed To (i) a proposed Host Cell Factor Target because
such proposed Host Cell Factor Target is not on the list of Not Available Targets and such license is available for the Limited Field
or, (ii) a proposed Viral Target, because such proposed Viral Target is a Viral Target and such license is available in the Field.

1.8 Biosimilar Product
The term “Biosimilar Product” shall mean, with respect to a Product, a product that (i) is not produced, licensed or owned by the
Roche  Group,  (ii)  as  determined  by  the  relevant  Regulatory  Authority  for  the  given  country  or  jurisdiction,  is  highly  similar  with
respect  to  such  Product,  notwithstanding  minor  differences  in  clinically  inactive  components,  and  with  no  clinically  meaningful
differences  between  the  product  and  such  Product  in  terms  of  the  safety,  purity  and  potency,  and  (iii)  is  approved  through  an
abbreviated regulatory pathway.

For countries or jurisdictions where no explicit biosimilar regulations exist, a Biosimilar Product includes any product that (i) has
been deemed to be biosimilar to such Product by a Regulatory Authority in another country or jurisdiction or (ii) have the same
nucleic acid sequence as the Compound in such Product.

1.9 Business Day
The term “Business Day” shall mean 9.00am to 5.00pm local time on a day other than a Saturday, Sunday or other day on which
commercial  banking  institutions  in  New  York,  New  York  and  Boston,  Massachusetts  are  authorized  or  permitted  by  law  to  be
closed.

1.10 Calendar Quarter
The  term  “Calendar  Quarter”  shall  mean  each  period  of  three  (3)  consecutive  calendar  months,  ending  March  31,  June  30,
September 30, and December 31.

1.11 Calendar Year
The term “Calendar Year” shall mean each period of twelve (12) months beginning on January 1 and ending December 31, except
for the first year which shall begin on the Effective Date and end on December 31.

1.12 cGLP
The  term  “cGLP”  shall  mean  the  current  Good  Laboratory  Practices,  including,  as  applicable:  (a)  guidelines  provided  by  the
International  Council  for  Harmonisation  of  Technical  Requirements  for  Pharmaceuticals  for  Human  Use  (ICH),  (b)  the
requirements in Part 58 of Title 21 of the Code of Federal Regulations and all related guidance published by the FDA and (c) as
required by other Applicable Law in applicable countries not subject to (a) and (b) where data from non-clinical studies conducted
in other countries may be used to obtain Regulatory Approval, provided that to the extent applicable to Dicerna, such additional
requirements not otherwise required under clauses (a) and (b) are set forth in an applicable Research Plan.

1.13 Change of Control
The term “Change of Control” shall mean, with respect to a Party: (a) the acquisition by any Third Party of beneficial ownership of
fifty percent (50%) or more of the then outstanding common shares

or voting power of such Party, other than acquisitions by employee benefit plans sponsored or maintained by such Party; (b) the
consummation of a business combination involving such Party, unless, following such business combination, the stockholders of
such Party immediately prior to such business combination beneficially own directly or indirectly more than fifty percent (50%) of
the then outstanding common shares or voting power of the entity resulting from such business combination; or (c) the sale of all
or substantially all of such Party’s assets or business relating to the subject matter of the Agreement.

1.14 Change of Control Group
The term “Change of Control Group” shall mean with respect to a Party, the person or entity, or group of persons or entities, that is
the  acquirer  of,  or  a  successor  to,  a  Party  in  connection  with  a  Change  of  Control,  together  with  affiliates  of  such  persons  or
entities that are not Affiliates of such Party immediately prior to the completion of such Change of Control of such Party.

1.15 Clinical Candidate
The term “Clinical Candidate” shall mean a Compound formally selected by the JRC during the Target Term, using criteria set forth
in the applicable Research Plan, in preparation for cGLP toxicology and other studies that are required to be carried out in order to
obtain Regulatory Approval for an initial Clinical Study for such Compound.

1.16 Clinical Study
The term “Clinical Study” shall mean a Phase I Study, Phase II Study, Phase III Study or Post-Approval Commitment Study, as
applicable.

1.17 Combination Product
The term “Combination Product” shall mean

(a) a single pharmaceutical formulation containing as its active ingredients both a Compound and one or more Non-Compound

Active Agents, or

(b) a combination therapy comprised of a Compound and one or more Non-Compound Active Agents, priced and sold in a single

package containing such multiple products or packaged separately but sold together for a single price,

in each case, including all dosage forms, formulations, presentations, line extensions, and package configurations. All references
to Product in this Agreement shall be deemed to include Combination Product.

1.18 Commercialization
The term “Commercialization” shall mean any and all activities directed to the preparation for the sale of, offering for sale or sale of
a Product, including activities relating to marketing, promoting, distributing and importing such Product. When used as a verb, to
“Commercialize” and “Commercializing” means to engaged in Commercialization, and “Commercialized” has a corresponding
meaning. For clarity, “Commercialization” shall not include any research or Development activities.

1.19 Commercialization Plan
The term “Commercialization Plan” shall mean a commercialization plan and budget for the Co-Promotion Territory prepared by
Roche and provided to Dicerna with respect to Shared Products that are subject to the Co-Promotion Option or are Co-Promotion
Products that will include: (i) sales force and launch planning for Shared Products (to the extent applicable), (ii) marketing plans
and budget.

For  Co-Promotion  Products,  the  Parties  (including  through  the  JSC,  as  applicable)  will  review  the  Commercialization  Plan  from
time  to  time  as  necessary  for  the  purpose  of  considering  appropriate  amendments  thereto;  provided  that  (a)  such  review  shall
occur no less frequently than once every six (6) months, (b)  Roche shall make appropriate representatives available to discuss
and  answer  questions  concerning  the  Commercialization  Plan  with  Dicerna  at  least  twice  annually  upon  Dicerna’s  reasonable
request in accordance with Section 7.12. In addition, either Party, through its representatives on the JSC (to the extent applicable),
may propose amendments to the Commercialization Plan for Co-Promotion Products at any time.

1.20 Commercially Reasonable Efforts
[* * *]

1.21 Committee
The term “Committee” shall mean the JRC or the JSC.

1.22 Companion Diagnostic
The term “Companion Diagnostic” shall mean any product or service that:

(a) identifies  a  person  having  a  disease  or  condition,  or  a  molecular  genotype  or  phenotype  that  predisposes  a  person  to  such

disease or condition, for which a Product could be used to treat and/or prevent such disease or condition;

(b) defines the prognosis or monitors the progress of a disease or condition in a person for which a Product could be used to treat

and/or prevent such disease or condition;

(c) is  used  to  select  a  therapeutic  or  prophylactic  regimen,  wherein  at  least  [*  *  *]  potential  therapeutic  or  prophylactic  regimen
involves a Product, and where the selected regimen is determined, based on the use of such product or service, to likely be
effective and/or to be safe for a person; and/or

(d) is used to confirm a Product’s biological activity and/or to optimize dosing or the scheduled administration of a Product.

1.23    Competitor
[* * *]

1.24 Complete or Completion
The  term  “Complete”  or  “Completion”  shall  mean  the  availability  of  the  final  formal  written  report  in  relation  to  a  Clinical  Study
setting out a final assessment of the results and conclusion of such Clinical Study.

1.25 Composition of Matter Claim
The  term  "Composition  of  Matter  Claim"  shall  mean,  for  a  given  Product  in  a  given  country  of  the  Territory,  a  Valid  Claim  that
Covers the composition of matter of the Compound per se, or the composition of matter of the Product comprising the Compound
plus  unspecified  pharmaceutically-acceptable  excipients.  For  clarity,  a  Compound  may  include  an  oligonucleotide  sequence
capable  of  providing  a  guide  strand  that  inhibits  or  prevents  the  expression  or  translation  of  viral  or  host  cell  factor  genes  in  a
human host.

1.26 Compound
The term “Compound” shall mean any Dicerna Compound or Roche Compound.

1.27 Compulsory Sublicense Compensation
The term “Compulsory Sublicense Compensation” shall mean, for a given country or region in the Territory, the compensation paid
to Roche by a Third Party (a “Compulsory Sublicensee”) under a license or sublicense of applicable Licensed IP, Joint Patent
Rights or Roche Patent Rights granted to the Compulsory Sublicensee (the “Compulsory Sublicense”) through the order, decree
or  grant  of  a  governmental  authority  having  competent  jurisdiction  in  such  country  or  region,  authorizing  such  Third  Party  to
manufacture, use, sell, offer for sale, import or export a Product in such country or region.

1.28 Confidential Information
The  term  “Confidential  Information”  shall  mean  any  and  all  information,  data  or  know-how  (including  Know-How),  whether
technical or non-technical, oral or written, that is disclosed by one Party or its Affiliates (“Disclosing Party”) to the other Party or
its Affiliates (“Receiving Party”). Confidential Information shall not include any information, data or know-how that:

(i) was  generally  available  to  the  public  at  the  time  of  disclosure,  or  becomes  available  to  the  public  after  disclosure  by  the

Disclosing Party other than through fault (whether by action or inaction) of the Receiving Party or its Affiliates,

(ii) can be evidenced by written records to have been already known to the Receiving Party or its Affiliates prior to its receipt from

the Disclosing Party,

(iii) is obtained at any time lawfully from a Third Party under circumstances permitting its use or disclosure,

(iv) is  developed  independently  by  the  Receiving  Party  or  its  Affiliates  as  evidenced  by  written  records  that  evidence  such

development without the knowledge of the Confidential Information transferred hereunder, or

(v) is approved in writing by the Disclosing Party for release by the Receiving Party.

The terms of this Agreement shall be considered Confidential Information of the Parties.

1.29 Continuation Election Notice
The  term  “Continuation  Election  Notice”  shall  mean  the  notice  Dicerna  provides  to  Roche  under  Section  20.3.2  or  20.3.3
describing  (i)  Dicerna’s  bona  fide  intentions  to  continue  ongoing  Development  and  Commercialization  of  applicable  Licensed
Product(s) and (ii) Dicerna’s request for Roche’s continuation of activities during the termination period and/or transfer of the data,
material and information relating to the applicable Licensed Product(s) in accordance with Section 20.3.2 or 20.3.3.

1.30 Control
The term “Control” shall mean (as an adjective or as a verb including conjugations and variations such as “Controls” “Controlled”
or “Controlling”) (a) with respect to Patent Rights and/or Know-How, the possession by a Party of the ability to grant a license or
sublicense of such Patent Rights and/or Know-How without violating the terms of any agreement or arrangement between such
Party  and  any  other  party  and  (b)  with  respect  to  proprietary  materials,  the  possession  by  a  Party  of  the  ability  to  supply  such
proprietary materials to the other Party as provided herein without violating the terms of any agreement or arrangement between
such Party and any other party. Notwithstanding anything in this Agreement to the contrary, in the event of a Change of Control of
a Party, such Party shall be deemed to not own or Control any intellectual property right that is owned or Controlled by the Change
of Control Group except to the extent the Change of Control Group intermingles its intellectual property with the Party’s intellectual
property.

1.31 Co-Promotion Exercise Period
The term “Co-Promotion Exercise Period” shall mean, with respect to a Shared Product, the period commencing upon Dicerna’s
exercise of its Cost Share Option and ending upon the later of (i) [* * *] after  Roche  provides  Dicerna  with  the  Roche  Estimate
pursuant to Section 10.6.2(a) and (ii) [* * *] after the Roche Response Date (if Dicerna provides timely Shared Product Questions).

1.32 Co-Promotion Product
The terms “Co-Promotion Product” shall mean a Shared Product for which Dicerna has a Co-Promotion Right as of the applicable
time.

1.33 Co-Promotion Territory
The terms “Co-Promotion Territory” shall mean the US.

1.34 Cost of Manufacture
The term “Cost of Manufacture” shall mean:

(a) When  a  Party  Manufactures  directly,  the  sum  of:  (i)  the  cost  (as  defined  in  each  such  Party's  Accounting  Standards
consistently applied) to Manufacture a Shared Product (or potential Shared Product), including items such as cost of materials,
yield  and  waste  levels,  direct  labor,  etc.;  (ii)  any  additional  applicable  overhead,  including  items  such  as  costs  that  relate  to
such Party’s supervisory, occupancy, facility and equipment, etc., as calculated according to and consistent with such Party’s
internal policies; (iii) other such costs burdened to the product due to Manufacturing (including inventory write-offs and excess
capacity charges to the extent not exceeding [* * *]); and (iv) the actual costs associated with the technology transfer to a CMO
to enable Manufacturing of that product, including any upfront and milestone based payments and startup costs allocable to
the  Shared  Product  that  are  associated  therewith.  All  Cost  of  Manufacture  shall  be  consistently  applied  to  the  product  for
ongoing clinical trials.

(b) When a Party uses a CMO to Manufacture a Shared Product, the amount actually paid to (and not reimbursed by) each such

CMO, including FTE costs associated with overseeing any CMO.

1.35 Cover
The term “Cover” shall mean (as an adjective or as a verb including conjugations and variations such as “Covered,” “Coverage” or
“Covering”) that the developing, making, using, offering for sale, promoting, selling, exporting or importing of a given compound,
formulation or product would infringe a Valid Claim in the absence of a license under or ownership in the Patent Rights to which
such Valid Claim pertains. The determination of whether a compound, formulation, process or product is Covered by a particular
Valid Claim shall be made on a country-by-country basis.

1.36 CTA
The term “CTA” shall mean a submission made to the applicable Regulatory Authority, the purpose of which is to gain necessary
clearance, licensure or approval by such agency to lawfully distribute a product to perform a human clinical trial of such product
that at the time of such submission is not otherwise lawfully able to be distributed or marketed under the Applicable Laws of the
relevant jurisdiction. CTAs include the CTAs approved by the EMA or Health Canada, investigational new drug applications (“IND”)
as defined in the FDCA and applicable regulations promulgated by the FDA, or the equivalent application to the equivalent agency
in any other country or group of countries, the filing of which is necessary to commence clinical testing of the Products in humans.

1.37 Detail
The term “Detail” shall mean a one-on-one face-to-face contact in which a Sales Representative makes a presentation, including
selling  message  and  features  and  benefits  of  the  Product  to  a  professional  having  prescribing  authority.  E-details  and
presentations  made  at  conventions  or  similar  gatherings  will  not  constitute  a  Detail.  Sample  drops  (if  applicable)  and  reminder
details shall not constitute a Detail. Attendance at group meetings or other group situations shall only be considered a single Detail
regardless of the number of participants. For the avoidance of doubt, Details may occur in group situations if the definition of a
Detail is met. When used as a verb, “Detailing” shall mean to engage in the activities set forth herein.

1.38 Development
The  term  “Development”  shall  mean  all  activities  undertaken  by  or  on  behalf  of  any  Roche  Group  member  on  and  after  the
Initiation of GLP Tox Study to develop a Compound or a Product including cGLP studies, manufacturing process and drug product
(dosage form) development, conducting toxicology studies, clinical testing and all Clinical Studies (including approved investigator
sponsored studies), statistical analysis and report writing, regulatory affairs and clinical regulatory activities. For further avoidance
of doubt, Development does not include activities undertaken by or on behalf of a Party under the R&D Collaboration. When used
as a verb, to “Develop” and “Developing” means to engage in Development, and “Developed” has a corresponding meaning.

1.39 Development Costs
The  term  “Development  Costs”  shall  mean  the  global  costs  actually  incurred,  including  FTE  Costs  and  any  direct  out-of-pocket
costs or expenses paid or accrued in accordance with Accounting Standards, by any Roche Group member for Development of a
Shared  Product  (or  potential  Shared  Product)  including  studies  of  the  clinical  aspects  conducted  internally  or  by  individual
investigators,  or  consultants  necessary  for  the  purpose  of  obtaining,  maintaining  and/or  expanding  marketing  approval  of  such
Shared  Product,  process  development,  process  improvement  and  recovery  costs,  failed  clinical  lots,  qualification  lots,  costs  for
preparing,  submitting,  reviewing  or  developing  data  or  information  for  the  purpose  of  submission  to  a  governmental  authority  to
obtain, maintain and/or expand marketing approval of such Shared Product. Development Costs shall not include costs associated
with  Companion  Diagnostics.  The  Development  Costs  shall  also  include  expenses  for  data  management,  CROs,  statistical
designs and studies, documentation preparation and other administration expenses associated with the clinical testing program or
Post-Approval  Commitment  Studies  and  Cost  of  Manufacture  for  clinical  supply  of  such  Shared  Product.  By  way  of  example,
Development Costs may include costs in connection with the following activities:

(a) Clinical  Studies  (for  clarity  including  Post-Approval  Commitment  Studies  but  excluding  Marketing  Studies  and  Phase  IV
Studies) for such Shared Products, including (i) the preparation for and conduct of clinical trials (except clinical trials that are
solely  conducted  for  regulatory  requirements  specific  to  a  particular  country  or  territory  outside  the  US);  (ii)  data  collection,
management  and  analysis  and  report  writing;  (iii)  clinical  laboratory  work;  (iv)  advisory  meetings  in  connection  with  such
Shared Products; and (v) Regulatory Expenses in direct connection with Clinical Studies for such Shared Products;

(b) CMC-related  Development  activities,  including  activities  relating  to  the  development  and  establishment  of  the  clinical  and

commercial manufacturing process for such Shared Products and establishment of the supply chain; and

(c) Cost  of  Manufacture  for  such  Shared  Products  or  other  drug  or  product  or  other  materials  used  for  such  Shared  Products,

including combination agents and comparators.

1.40 Development Plan
The term “Development Plan” shall mean Roche’s development plan for the Lead Product, the scope and level of detail of which
shall be consistent with the standards Roche applies to its internal programs at a similar stage of development.

1.41 Dicerna Base Patent Rights
The term “Dicerna Base Patent Rights” shall mean the Patent Rights listed in Appendix 1.41 of this Agreement.

1.42 Dicerna Compound
The term “Dicerna Compound” shall mean

(a) any Additional Dicerna Compounds, and

(a)

any GalXC Molecules owned or Controlled by Dicerna Directed To HBV other than Additional Dicerna Compounds, including

(i)    the Lead Compound, and

(ii)    any derivative, modification or backup compound to the Lead Compound.

in both cases excluding a Roche Compound.

1.43 Dicerna GalXC Platform Patent Rights
The term “Dicerna GalXC Platform Patent Rights” shall mean Patent Rights owned or Controlled (other than by license from the
Roche  Group  under  this  Agreement)  by  Dicerna  or  its  Affiliates,  prior  to  or  during  the  Agreement  Term,  that  are  reasonably
necessary or useful to research, have researched, develop, have developed, make, have made, use, have used, register, have
registered,  sell,  have  sold,  offer  for  sale,  import  or  export  GalXC  Molecules  and  claim  the  GalXC  Platform  or  the  use  or
manufacture thereof, but however do not claim exclusively (i) Compounds, targets or associated sequences/constructs, in each
case Directed To HBV or (ii) the use or manufacture of such Compounds or targets. Dicerna GalXC Platform Patent Rights as of
the Effective Date are listed in Appendix 1.43 of this Agreement.

1.44 Dicerna Phase I Study
The term “Dicerna Phase I Study” shall mean the Phase I Study for the Lead Compound that Dicerna has commenced but not yet
Completed as of the Signature Date, as well as the Optional Phase I Cohorts(s) if applicable.

1.45 Directed To
The term “Directed To” shall mean with regard to an RNAi product or oligonucleotide product and target, [* * *]. For clarity, if the
defined term “Directed To” is separated, such as when required grammatically (e.g., when discussing targets “To which a product
is Directed”), such separated term shall maintain the same meaning set forth in the previous sentence.

1.46 Discontinued Target
The term “Discontinued Target” shall mean a target that has been designated as such in accordance with Sections 3.8, 20.2.4 or
20.2.5.

1.47 Effective Date
The term “Effective Date” is defined in Section 22.4.

1.48 EMA
The term “EMA” shall mean the European Medicines Agency or any successor agency with responsibilities comparable to those of
the European Medicines Agency.

1.49 Encumbered Combination Agent
The term “Encumbered Combination Agent” shall mean an active ingredient in a Combination Product that is not a Compound and
that (i) is subject to Third Party rights or obligations granted from or to the Roche Group or (ii) directly competes with a product
under clinical development or commercialization by Dicerna.

1.50 Encumbered Combination Indication
The term “Encumbered Combination Indication” shall mean, with respect to a Co-Promotion Product that is a Combination Product
containing an active ingredient that is not a Compound, an indication for which Regulatory Approval is obtained with respect to
which Roche has granted to a Third Party co-promotion or other rights.

1.51 EU
The  term  “EU”  shall  mean  the  European  Union  and  all  its  then-current  member  countries  but  including  in  any  case  France,
Germany, Italy, Spain and the United Kingdom regardless of whether they are then-current member countries.

1.52 Excluded Claim
The  term  “Excluded  Claim”  shall  mean  a  dispute,  controversy  or  claim  between  the  Parties  that  concerns  (a)  the  validity  or
infringement,  scope,  enforceability  or  inventorship  of  a  patent,  trademark  or  copyright,  or  (b)  any  antitrust,  anti-monopoly  or
competition Applicable Law, whether or not statutory.

1.53 Excluded Dicerna Patent Right
The term “Excluded Dicerna Patent Right” shall mean a claim in a Patent Right owned or Controlled by Dicerna to the extent that
such claim exclusively claims a Non-Compound Active Agent, alone or in combination with other molecular entities, none of which
can be Compounds. For clarity, if a claim in a Patent Right Controlled by Dicerna lists a molecular entity that is a Compound, then
such Patent Right is not an Excluded Dicerna Patent Right.

1.54 Exclusivity Period
The term “Exclusivity Period” shall mean the period of time commencing on the Effective Date and ending the earlier of the non-
initiation, expiration or earlier termination of the R&D Collaboration. For clarity, if the R&D Collaboration does not commence, the
Exclusivity  Period  for  both  Parties  will  end  as  of  the  earlier  of  date  of  the  notice  of  termination  of  the  Agreement  or  the  date  of
Roche’s notice that Roche elects not to initiate the R&D Collaboration.

1.55 Ex-Limited Licensee
The  term  “Ex-Limited  Licensee”  shall  mean  Third  Parties  (and  their  respective  sublicensees,  successor  or  assigns)  to  whom
Dicerna has granted as of the Signature Date rights imposing PN Field Restrictions.

1.56 Expert

The  term  “Expert”  shall  mean  a  person  with  no  less  than  [*  *  *]  of  pharmaceutical  industry  experience  and  expertise  having
occupied at least one senior position within a large pharmaceutical company relating to product commercialization and/or licensing
but excluding any current or former employee or consultant of either Party. Such person shall be fluent in the English language.

1.57 Extraordinary Event
The  term  “Extraordinary  Event”  shall  mean  Development  Costs  associated  with  any  of  the  following  activities  that  were  not
anticipated  in  a  given  Annual  Budget  and  the  then  current  Development  Plan:  (i)  faster  than  planned  Clinical  Study  enrollment,
(ii)  written  guidance  or  requirements  from  a  Regulatory  Authority  that  would  result  in  amendments  to  the  Development  Plan,
(iii) technical issues affecting the ability to supply clinical material of Compound or Product or (iv) mutual agreement by the Parties
to amend the Development Plan.

1.58 FDA
The term “FDA” shall mean the Food and Drug Administration of the United States of America.

1.59 FDCA
The term “FDCA” shall mean the Food, Drug and Cosmetics Act.

1.60 Field
The term “Field” shall mean all uses.

1.61 Filing
The  term  “Filing”  shall  mean  the  filing  of  an  application  by  the  FDA  as  defined  in  the  FDCA  and  applicable  regulations,  or  the
equivalent application to the equivalent agency in any other country or group of countries including MAA by the EMA, the official
approval of which is required before any lawful commercial sale or marketing of Products.

1.62 Finalized
The term “Finalized” shall mean the applicable Clinical Study has been fully enrolled with the last enrolled patient receiving the last
dose of Product pursuant to the study protocol and the draft clinical study report including listings and tables are available.

1.63 First Commercial Sale
The term “First Commercial Sale” shall mean, on a country-by-country basis, the first invoiced sale of a Product to a Third Party by
the Roche Group following the receipt of any Regulatory Approval required for the sale of such Product, or if no such Regulatory
Approval is required, the date of the first invoiced sale of a Product to a Third Party by the Roche Group in such country.

1.64 FTE
The term “FTE” shall mean with respect to a person, the equivalent of the work of [* * *] employee full time for [* * *] (consisting of
[* * *] per Calendar year excluding vacations and holidays), or such other period as may be prescribed by Applicable Law, on a
country-by-country basis. Overtime, work on weekends, holidays and the like will not be counted with any multiplier (e.g. time-and-
a-half or double time) toward the number of hours that are used to calculate the FTE contribution.

1.65 FTE Costs

The  term  “FTE  Costs”  shall  mean  Roche’s  or  Dicerna’s  FTE  rate,  assessed  consistent  with  internal  Accounting  Standards,
multiplied  by  the  applicable  number  of  FTEs  of  Roche  or  its  Affiliates  or  Dicerna  or  its  Affiliates,  as  applicable,  performing  the
applicable activities during such period multiplied by the applicable percentage of time such FTEs have performed the applicable
activities during such period.

1.66 Gatekeeper
The  term  “Gatekeeper”  shall  mean  an  independent  outside  counsel  appointed  by  Dicerna  responsible  for  conducting  the
Gatekeeper Process, through which Roche may directly inquire as to whether any proposed target is an Available Target or Not
Available Target.

1.67 Gatekeeper Process
The  term  “Gatekeeper  Process”  shall  mean  the  processes  described  in  Section  3.7  to  be  used  for  target  nomination  or  target
reservation.

1.68 GalXC Molecule
The term “GalXC Molecule” shall mean [* * *].

1.69 GalXC Platform
The term "GalXC Platform" shall mean [* * *].

1.70 GalXC Platform Improvements
The term “GalXC Platform Improvements” shall mean [* * *].

1.71 Genentech
The term “Genentech” shall mean Genentech, Inc. for so long as Genentech is an Affiliate of Roche.

1.72 Genentech Patent Right
The  term  “Genentech  Patent  Right”  shall  mean  Patent  Rights  claiming  inventions  based  on  projects  originating  from  the
Genentech early development organization made by or on behalf of Genentech employees (with or without Third Parties). As of
the  Signature  Date,  as  between  the  Roche  Group  Affiliates,  Genentech  Patent  Rights  are  owned  by  Genentech  in  the  US  and
Roche Basel outside the US.

1.73 Generic Product
The term “Generic Product” shall mean, with respect to a Product, a product that (i) is not produced, licensed or owned by the
Roche Group, (ii) contains a pharmaceutically active ingredient that is the same as any Compound in such Product, (iii) has the
same or substantially the same labelling as the applicable Product for at least one indication of such Product, and (iv) is approved
through an abbreviated regulatory pathway, to the extent one exists in a given country.

1.74 Handle
The term “Handle” shall mean preparing, filing, prosecuting (including interferences, reissue, re-examination, post-grant reviews,
inter-partes reviews, derivation proceedings and opposition proceedings) and maintaining.

1.75 HBV
The term “HBV” shall mean hepatitis B virus.

1.76 Host Cell Factor Target

The term “Host Cell Factor Target” shall mean [* * *]:

1.77 Hybrid Product
The term “Hybrid Product” shall mean a Product, on a country-by-country basis, that contains (i) a Lead Compound where such
Lead Compound has already been included in a Lead Product that has achieved its First Commercial Sale in such country as a
Product not containing a Selected Target Compound and (ii) at least one Selected Target Compound.

1.78 IFRS
The term “IFRS” shall mean International Financial Reporting Standards.

1.79 Improvement
The term “Improvement” shall mean, any Invention which is [* * *].

1.80 Initiation
The term “Initiation” shall mean the date that a human is first dosed with the Product in a Clinical Study approved by the respective
Regulatory Authority.

1.81 Initiation of GLP Tox Study
The term “Initiation of GLP Tox Study” shall mean, with respect to a Compound or Product, the date that the first animal is first
dosed with such Compound or Product in a study of the relationship between dose and its effects on the exposed animal, where
(i)  the  study  is  conducted  in  accordance  with  cGLP  standards  and  (ii)  the  study  is  intended  to  support  establishment  of  a  safe
starting dose of the Compound or Product in human Clinical Studies.

1.82 Insolvency Event
The term “Insolvency Event” shall mean circumstances under which a Party (i) has a receiver or similar officer appointed over all
or a material part of its assets or undertaking; (ii) passes a resolution for winding-up (other than a winding-up for the purpose of, or
in connection with, any solvent amalgamation or reconstruction) or a court makes an order to that effect or a court makes an order
for  administration  (or  any  equivalent  order  in  any  jurisdiction);  (iii)  enters  into  any  composition  or  arrangement  with  its  creditors
(other than relating to a solvent restructuring); (iv) ceases to carry on business; (v) is unable to pay its debts as they become due
in the ordinary course of business.

1.83 Internal Revenue Code
The term “Internal Revenue Code” shall mean the US Internal Revenue Code of 1986, as amended.

1.84 Invention
The term “Invention” shall mean an invention, whether or not patentable, that is conceived or reduced to practice in connection
with any activity carried out pursuant to this Agreement. Under this definition, an Invention may be made by employees of Dicerna
solely or jointly with a Third Party (a “Dicerna Invention”), by employees of the Roche Group solely or jointly with a Third Party (a
“Roche Invention”), or jointly by employees of Dicerna and employees of the Roche Group with or without a Third Party (a “Joint
Invention”).

1.85 Joint Know-How

 
The  term  “Joint  Know-How”  shall  mean  Know-How  that  is  made  jointly  by  employees  of  Dicerna  and  the  Roche  Group,  with  or
without a Third Party in connection with any activity carried out pursuant to this Agreement.

1.86 Joint Patent Rights
The term “Joint Patent Rights” shall mean all Patent Rights Covering a Joint Invention other than GalXC Platform Improvements or
Roche Background Improvements.

1.87 JOT
The term “JOT” shall mean a joint operating team (or Joint Project Team) described in Section 7.10.

1.88 JRC
The term “JRC” shall mean the joint research committee described in Section 7.1.

1.89 JSC
The term “JSC” shall mean the joint steering committee described in Section 7.2.

1.90 Know-How
The term “Know-How” shall mean data, knowledge and information, including materials, samples, chemical manufacturing data,
toxicological  data,  pharmacological  data,  preclinical  and  clinical  data,  assays,  platforms,  formulations,  specifications,  quality
control  testing  data,  that  are  confidential  and  necessary  or  useful  for  the  discovery,  manufacture,  development  or
commercialization of Products.

1.91 Lead Compound
The term “Lead Compound” shall mean the molecule designated as DCR-S219, the structure of which is listed in Appendix 1.91 of
this Agreement.

1.92 Lead Product
The  term  “Lead  Product”  shall  mean  any  Product  containing  the  Lead  Compound  and  does  not  include  a  Selected  Target
Compound.

1.93 Licensed IP
The term “Licensed IP” shall mean all Patent Rights and Know-How Controlled by Dicerna or its Affiliates (other than by license
from the Roche Group under this Agreement), prior to or during the term of the Agreement, necessary or useful to research, have
researched, develop, have developed, make, have made, use, have used, register, have registered, sell, have sold, offer for sale,
import  or  export  Compounds  and/or  Products  in  the  Field,  including  Dicerna  Base  Patent  Rights  and  Dicerna  GalXC  Platform
Patent Rights, but excluding Excluded Dicerna Patent Rights.

1.94 Licensed Product
The term “Licensed Product” shall mean any product, including any Combination Product, containing a Dicerna Compound as a
pharmaceutically active ingredient, regardless of their finished forms or formulations or dosages. One Licensed Product may be
distinguished from another Licensed Product by the Dicerna Compound being a distinctive active pharmaceutical ingredient.

1.95 Like-Substance Product
The term “Like-Substance Product” shall mean a Generic Product or Biosimilar Product.

1.96 Limited Field

The term “Limited Field” shall mean [* * *].

1.97 MAA
The term “MAA” shall mean a marketing authorization application, including all necessary documents, data, and other information
concerning a Product, required for Regulatory Approval of the Product as a pharmaceutical product by the EMA or an equivalent
application (such as an NDA) to the equivalent agency in any other country or group of countries (e.g. an NDA with the FDA).

1.98 Major Markets
The term “Major Markets” shall mean the [* * *].

1.99 Marketing Study
The term “Marketing Study” shall mean any human clinical study for a Shared Product conducted following Initiation of a Pivotal
Study  for  such  Shared  Product  that  is  not  required  for  receipt  of  Regulatory  Approval  (whether  such  human  clinical  study  is
conducted prior to or after receipt of such Regulatory Approval) and is not a Post-Approval Commitment Study, but that may be
useful in support of the post-Regulatory Approval exploitation of such Shared Product.

1.100Materials
The  term  “Materials”  shall  mean  any  laboratory  research  materials  that  consist  of  the  following  substances  (other  than
oligonucleotides): (i) organic or inorganic chemical or compound; (ii) gene; (iii) vector or construct, whether plasmid, phage, virus
or any other type; (iv) host organism, including bacteria and eukaryotic cells; (v) eukaryotic or prokaryotic cell line or expression
system;  (vi)  protein,  including  any  peptide  or  amino  acid  sequence,  enzyme,  antibody  or  protein  conferring  targeting  properties
and any fragment of a protein or peptide or enzyme; (vii) genetic material, including any genetic control element (e.g., promoters);
(viii) virus; or (ix) assay.

1.101Manufacture
The term “Manufacture” or “Manufacturing” shall mean all operations in the manufacture, receipt, incoming inspections, storage
and handling of materials, manufacture, processing, formulation, filling, packaging, labeling, warehousing, quality control testing
(including in-process release and stability testing), shipping and release of Shared Products.

1.102Medical Affairs Activities
The term “Medical Affairs Activities” shall mean the coordination of medical information requests and field based medical scientific
liaisons  with  respect  to  Co-Promotion  Products,  including  activities  of  medical  scientific  liaisons,  activities  involving  key  opinion
leaders, and the provision of medical information services with respect to a Co-Promotion Product.

1.103Method of Use Claim
The  term  "Method  of  Use  Claim"  shall  mean,  for  a  given  Product  in  a  given  country  of  the  Territory,  a  Valid  Claim  of  an  issued
patent that claims an approved indication in such country for the Product.

1.104Net Sales
[* * *].

1.105Non-Compound Active Agent
The term “Non-Compound Active Agent” shall mean a therapeutically or prophylactically active ingredient or compound that is not
a Compound.

1.106Not Available Target
The term “Not Available Target” shall mean, [* * *].

1.107Party
The term “Party” shall mean Dicerna or Roche, as the case may be, and “Parties” shall mean Dicerna and Roche collectively.

1.108Patent Rights
The term “Patent Rights” shall mean all rights under any issued patent or pending patent application (which, for the purposes of
this Agreement, includes certificates of invention, applications for certification of invention, and priority rights), in any country of the
Territory,  including  any  patents  issuing  on  such  patent  application,  and  further  including  any  and  all  provisional,  substitution,
extension  (including  pediatric  exclusivity  extension)  or  supplementary  protection  certificate,  reissue,  reexamination,  restoration,
renewal,  confirmation,  registration,  revalidation,  revisions  and  additions,  divisional,  continuation,  continued  prosecution  (and
requests therefor), or continuation-in-part of any of the foregoing.

1.109Pharmacovigilance Agreement
The term “Pharmacovigilance Agreement” shall mean an agreement entered into by the Parties to set forth the responsibilities and
obligations of the Parties with respect to the procedures and timeframes for compliance with Applicable Laws pertaining to safety
of the applicable Product and its related activities.

1.110Phase I Study
The  term  “Phase  I  Study”  shall  mean  a  human  clinical  trial  in  any  country  that  would  satisfy  the  requirements  of  21  C.F.R.  §
312.21(a) (FDCA), as amended from time to time, and the foreign equivalent thereof.

1.111Phase II Study
The term “Phase II Study” shall mean a human clinical trial, for which the primary endpoints include a determination of an effective
dose range for Phase III Studies and/or a preliminary determination of efficacy in patients being studied as described in 21 C.F.R.
§ 312.21(b) (FDCA), as amended from time to time, and the foreign equivalent thereof.

1.112Phase III Study
The term “Phase III Study” shall mean a human clinical trial that is prospectively designed to demonstrate statistically whether a
product  is  safe  and  effective  for  use  in  humans  in  a  manner  sufficient  to  obtain  Regulatory  Approval  to  market  such  product  in
patients having the disease or condition being studied as described in 21 C.F.R. § 312.21(c) (FDCA), as amended from time to
time, and the foreign equivalent thereof.

1.113Phase IV Study
The term “Phase IV Study” shall mean a human clinical trial initiated post-approval of the Product to accumulate evidence about
the efficacy and/or safety of the Product, which shall not include any Post-Approval Commitment Study.

1.114Pivotal Study

The  term  “Pivotal  Study”  shall  mean,  with  respect  to  any  Product,  a  Clinical  Study  that  at  the  time  of  Initiation  (or  any  later
expansion of patient enrollment, if applicable), is expected to be the basis for Regulatory Approval of such Product.

1.115PN Field Restriction
The term “PN Field Restriction” shall mean, [* * *].

1.116Post-Approval Commitment Study
The term “Post-Approval Commitment Study” shall mean any human clinical study for a Shared Product conducted after marketing
authorization of such Shared Product has been obtained from the FDA at the request of or requirement of the FDA.

1.117Product
The term “Product” shall mean any Licensed Product or Roche Product.

1.118Product Labeling or Product Label
The  term  “Product  Labeling”  or  “Product  Label”  shall  mean,  with  respect  to  a  Product  in  a  country  in  the  Territory,  (a)  the
Regulatory  Authority-approved  prescribing  information  for  such  Product  for  such  country,  including  any  required  patient
information, and (b) all labels and other written, printed or graphic matter upon a container, wrapper or any package insert utilized
with or for such Product in such country, including any required patent marking.

1.119R&D Collaboration Term
The term “R&D Collaboration Term” shall mean the period of time commencing on the first individual Target Term and ending on
the conclusion of the last individual Target Term.

1.120Regulatory Approval
The term “Regulatory Approval” shall mean any approvals (including supplements, amendments, pre- and post-approvals, pricing
and  reimbursement  approvals),  licenses,  registrations  or  authorizations  (including  marketing  and  labeling  authorizations)  by  a
Regulatory  Authority,  necessary  for  the  research,  Development,  registration,  Manufacture  (including  formulation),  distribution,
importation,  exportation,  use,  sale  or  Commercialization  of  a  pharmaceutical  product  (including  a  Compound  or  Product)  in  a
regulatory jurisdiction in the Territory.

1.121Regulatory Authority
The  term  “Regulatory  Authority”  shall  mean  any  national,  supranational  (e.g.,  the  European  Commission,  the  Council  of  the
European  Union,  the  EMA),  regional,  state  or  local  regulatory  agency,  department,  bureau,  commission,  council  or  other
governmental entity including the FDA or any counterpart of the FDA outside the United States, in each country involved in the
granting  of  regulatory  approval  for,  or  with  authority  over,  the  research,  Development,  registration,  Manufacture  (including
formulation)  and  Commercialization  of,  a  pharmaceutical  product  (including  a  Compound  or  Product),  which  may  include  the
authority to grant the required reimbursement and pricing approvals for such sale.

1.122Regulatory Exclusivity
The  term  “Regulatory  Exclusivity”  shall  mean  any  exclusive  marketing  rights  or  data  exclusivity  rights  conferred  by  any
governmental authority under Applicable Law with respect to a Product in a country or jurisdiction in the Territory to prevent Third
Parties  from  selling  such  Product  in  such  country  or  jurisdiction,  other  than  a  Patent  Right,  including  orphan  drug  exclusivity,
pediatric exclusivity, rights

conferred  in  the  U.S.  under  the  FD&C  Act,  in  the  EU  under  Directive  2001/83/EC,  or  rights  similar  thereto  in  other  countries  or
regulatory jurisdictions in the Territory.

1.123Regulatory Expenses
The  term  “Regulatory  Expenses”  shall  mean  those  FTE  Costs  and  any  direct  out-of-pocket  costs  (including  filing,  user,
maintenance  and  other  fees  paid  to  Regulatory  Authorities)  paid  or  incurred  as  an  expense  in  accordance  with  Accounting
Standards by Roche or any of its Affiliates or Sublicensees after the Effective Date, that are specifically identifiable or reasonably
allocable to the preparation of regulatory submissions for, and the obtaining and maintenance of Regulatory Approval, including
compliance with Regulatory Approvals and requirements of such Regulatory Authorities, adverse event recordation and reporting
and regulatory affairs activities.

1.124Regulatory Materials
The term “Regulatory Materials” shall mean any regulatory application, submission, notification, communication, correspondence,
registration  and  other  filings  made  to,  received  from  or  otherwise  conducted  with  a  Regulatory  Authority  in  order  to  Develop  or
Commercialize the applicable Lead Compound and Lead Product. Regulatory Materials include any CTAs.

1.125Research Plan
The term “Research Plan” shall mean the agreed upon plan of research for each Selected Target including the criteria to be used
for  selecting  a  Clinical  Candidate.  Updates  to  the  Research  Plan  do  not  require  an  amendment  to  this  Agreement  and  may  be
approved by unanimous consent of the JRC.

1.126Reserved Target
The term “Reserved Target” shall mean [* * *]. The number of Host Cell Factor Targets designated as either Reserved Targets,
Selected  Targets  and  Discontinued  Targets  at  any  given  time  cannot  exceed  five  (5)  in  aggregate  during  the  course  of  the
collaboration (the “Host Cell Factor Target Limitation”).

1.127    Roche Background Improvements
The term “Roche Background Improvements” shall mean [* * *].

1.128Roche Compound
The  term  “Roche  Compound”  shall  mean  an  oligonucleotide  compound  Controlled  by  Roche  and  provided  by  Roche  or  its
Affiliates into the R&D Collaboration that is Directed To a Selected Target and is not a GalXC Molecule.

1.129Roche Grant-Back Patent Rights
The  term  “Roche  Grant-Back  Patent  Rights”  shall  mean  Patent  Rights  Controlled  by  Roche  that  are  reasonably  necessary  to
develop,  have  developed,  manufacture,  have  manufactured,  use,  offer  to  sell,  sell,  promote,  export  and  import  Dicerna
Compounds  or  Licensed  Products  that  are  not  Combination  Products.  For  purposes  of  clarity,  Genentech  Patent  Rights  are
specifically excluded from Roche Grant-Back Patent Rights.

1.130Roche Group
The term “Roche Group” shall mean collectively Roche, its Affiliates and its Sublicensees.

1.131Roche Patent Rights
The term “Roche Patent Rights” shall mean all Patent Rights that Roche Controls (other than by a license from Dicerna under this
Agreement) during the Agreement Term other than Licensed IP and

Joint Patent Rights. For purposes of clarity, Genentech Patent Rights are specifically excluded from Roche Patent Rights.

1.132Roche Product
The  term  “Roche  Product”  shall  mean  any  product,  including  any  Combination  Product,  containing  a  Roche  Compound  as  a
pharmaceutically  active  ingredient,  regardless  of  their  finished  forms  or  formulations  or  dosages.  One  Roche  Product  may  be
distinguished from another Roche Product by the Roche Compound being a distinctive active pharmaceutical ingredient.

1.133Royalty Term
The term “Royalty Term” shall mean, with respect to a Product and for a given country, the period of time commencing on the date
of First Commercial Sale of the Product in such country and ending:

(a) for Lead Products: on the later of the date that is [* * *].

(b) for Hybrid Products: on the later of the date that is [* * *] and

(c) for Selected Target Products: on the later of the date that is [* * *]

1.134Sales
The term “Sales” shall mean, for a Product in a particular period, the sum of (i) and (ii):

[* * *].

By way of example, the gross-to-net deductions taken in accordance with IFRS as of the Effective Date include:

(a) credits,  reserves  or  allowances  actually  granted  for  (i)  damaged,  outdated,  returned,  rejected,  withdrawn  or  recalled
Product,  (ii)  wastage  replacement  and  short-shipments;  (iii)  billing  errors  and  (iv)  indigent  patient  and  similar  programs
(e.g., price capitation);

(b) governmental price reductions and government mandated rebates;

(c) chargebacks, including those actually granted to wholesalers, buying groups and retailers;

(d) customer rebates, including cash sales incentives for prompt payment, cash and volume discounts; and

(e) taxes and any other governmental charges or levies imposed upon or measured by the import, export, use, manufacture or

sale of a Product (excluding income or franchise taxes).

For  purposes  of  clarity,  any  such  Sublicensee  sales  as  reported  to  Roche  in  accordance  with  Compulsory  Sublicense
agreements shall be excluded from the sales amount.

When a Product is a Combination Product, and there are deductions under clauses (a)-(e), such deductions shall be allocated
to such Combination Product as agreed or determined under Section 11.4.4. For purposes of clarity, sales by Roche and its
Affiliates to any Sublicensee that is not a Roche Affiliate for resale shall be excluded from “Sales” under this clause (i).

(i)

for Sublicensees that are not Affiliates of Roche (and excluding Compulsory Sublicensees), the sales amounts reported to
Roche and its Affiliates in accordance with their then-currently used accounting standards and Section 2.4. For the purpose
of clarity, any such Sublicensee sales as

reported  to  Roche  in  accordance  with  Compulsory  Sublicense  agreements  shall  be  excluded  from  the  Sales  amount,  and
instead shall be addressed in accordance with Section 11.4.8.

1.135Sales Representative
The  term  “Sales  Representative”  shall  mean  a  pharmaceutical  sales  representative  or  other  persons  engaged  or  employed  by
either  Party  to  conduct  Detailing  and  other  promotional  efforts  or  relevant  activities  with  respect  to  the  Products  and  consistent
with the Commercialization Plan.

1.136Selected Target
The term “Selected Target” shall mean [* * *].

1.137Selected Target Compound
The  term  “Selected  Target  Compound”  shall  mean  a  Compound  that  is  Directed  To  a  Selected  Target  but  is  not  the  Lead
Compound.

1.138Selected Target Product
The term “Selected Target Product” shall mean any Product that (i) includes a Selected Target Compound and (ii) if it includes the
Lead Compound, is not a Hybrid Product.

1.139Specific Patent Right
The  term  “Specific  Patent  Right”  shall  mean  any  Licensed  IP  Patent  Right  (other  than  Dicerna  GalXC  Platform  Patent  Rights)
exclusively directed to one or more Compound(s) or Licensed Product(s).

1.140Signature Date
The term “Signature Date” shall mean the date set forth on the cover page to this Agreement.

1.141Sublicensee
The  term  “Sublicensee”  shall  mean  a  Third  Party  to  which  Roche  has  licensed  rights  (through  one  or  multiple  tiers),  other  than
through a Compulsory Sublicense, pursuant to this Agreement.

1.142Target Nomination Deadline
The term “Target Nomination Deadline” shall mean the earlier of [* * *] after Roche’s receipt of the following data from the Dicerna
Phase I Study:

1.

[* * *] and

2. all available patient data from [* * *], and

(i)

[* * *]

(ii) [* * *]

In the event of either 2.(i) or 2.(ii) above, Roche will inform Dicerna in writing (which may be via email) prior to what would have
otherwise been the applicable Target Nomination Deadline.

1.143Target Term
The  term  “Target  Term”  shall  mean,  for  a  given  Selected  Target,  the  period  commencing  on  the  date  the  JRC  approves  the
corresponding Research Plan and ending on the earlier of (a) [* * *] thereafter and (b) the date on which a Clinical Candidate for
such  Selected  Target  is  selected  by  the  JRC.  The  Target  Term  may  be  (i)  extended  by  Roche  for  up  to  [*  *  *]  extensions  upon
written notice to Dicerna prior to the expiration of the initial [* * *] period, provided that no Compound Directed To such Selected

Target  meets  the  criteria  for  Clinical  Candidate  selection  as  set  forth  in  the  applicable  Research  Plan,  or  (ii)  shortened  (or
lengthened beyond Roche’s unilateral [* * *] extension right) by unanimous decision of the JRC.

1.144Territory
The term “Territory” shall mean all countries of the world.

1.145Third Party
The term “Third Party” shall mean a person or entity other than (i) Dicerna or any of its Affiliates or (ii) a member of the Roche
Group.

1.146Transfer Activities
The  term  “Transfer  Activities”  shall  mean  the  transfer  from  Dicerna  to  Roche  of  the  data,  Materials,  Know-How  (including  the
GalXC  Platform),  documentation  and  other  items  in  Dicerna’s  possession  (including  through  its  Affiliates),  and  reasonable
technical  assistance,  in  each  case,  to  the  extent  reasonably  necessary  or  useful  for  Roche  to  continue  Development  of  the
Transfer Compounds, along with such other commercially reasonable actions which may be conducted by Dicerna to effectuate
transfer of responsibilities and use good faith efforts to make relevant assignments (to the extent Dicerna has the right to do so)
related  to  the  Transfer  Compounds,  for  example,  with  Regulatory  Authorities,  patent  offices,  Third  Party  contract  manufacturing
organizations  (each  a  “CMO”),  Third  Party  contract  research  organizations  (each  a  “CRO”)  and  Clinical  Study  investigators.
Transfer  Activities  are  to  be  made  at  the  appropriate  time  on  or  after  the  Effective  Date  with  respect  to  the  Lead  Transfer
Compounds (“Lead Transfer Activities”) and Selected Target Transfer Compounds (“Selected Target Transfer Activities”) and
shall  be  made  (i)  as  set  forth  in  this  Agreement,  (ii)  in  accordance  with  the  applicable  Transfer  Plans  or  (iii)  as  otherwise
reasonably requested by Roche.

1.147Transfer Compound
The term “Transfer Compound” shall mean: (i) the Lead Compound with respect to the Dicerna Phase I Study and any existing
derivative, modification or backup compound to the Lead Compound (each a “Lead Transfer Compound”); and (ii) at the point of
a Clinical Candidate selection, all Additional Dicerna Compounds that are Directed To the Selected Target associated with such
Clinical Candidate selected (each a “Selected Target Transfer Compound”).

1.148Transfer Plan
The term “Transfer Plan” shall mean (i) a plan for the Lead Transfer Activities (“Lead Transfer Plan”) or (ii) on a Selected Target-
by-Selected Target basis, a plan for the Selected Target Transfer Activities (“Selected Target Transfer Plan”). Each Transfer Plan
may consist of multiple sections applicable for relevant functions (e.g. regulatory, clinical, safety, manufacturing, clinical). The JRC
will  establish,  implement  and  oversee  the  Parties’  activities  under  each  Transfer  Plan.  The  initial  Lead  Transfer  Plan  has  been
provided by Dicerna by letter dated October 30, 2019.

1.149US
The term “US” shall mean the United States of America and its territories and possessions.

1.150US$
The term “US$” shall mean US dollars.

1.151Valid Claim

The  term  “Valid  Claim”  shall  mean,  as  applicable,  a  claim  in  any:  (i)  unexpired  and  issued  patent  within  the  applicable  Patent
Rights in any country of the Territory that has not been disclaimed, revoked or held invalid by a final nonappealable decision of a
court of competent jurisdiction or government agency or (ii) pending patent application within the applicable Patent Rights in any
country of the Territory that has been on file with the applicable patent office for no more than [* * *].

1.152Viral Target
The term “Viral Target” shall mean [* * *].

1.153Additional Definitions
Each of the following definitions is set forth in the Section of this Agreement indicated below:

Definition
Accounting Period
Acquired Party
Alliance Director
Annual Budget
Bankruptcy Code
Breaching Party
CDA
Chairperson
Chemical Raw Materials
Chugai
CMO
Compulsory Profit Share Percentage
Compulsory Sublicense
Compulsory Sublicensee
Co-Promote, Co-Promoting, Co-Promotion
Co-Promotion Agreement
Co-Promotion Option
Co-Promotion Right
Cost Share Option
Cost Share Package
Cost Share Right
CRO
Debarred
Decision Period
Deduction Percentage
Defending Party
Dicerna
Dicerna Indemnitees
Dicerna Invention
Dicerna-Originated Transfer Activities
Disclosing Party

Section
12.1
20.2.3
7.12
6.3.2(b)
21
20.2.1
22.11
7.3
8.4.1
1.3
1.146
11.4.8
1.141
1.141
10.6.4
10.6.3
10.6.1
10.6.1
6.3
6.3.1.1
6.3
1.146
22.6
15.6.2
1.104
15.7
cover page
17.1
1.85
20.3.5
1.28

Definition
Dispute
DOJ
Effective Date
Expert Committee
First Eligible Co-Promotion Indication
FTC
Full Review
HSR Act
H-W Suit Notice
IND
Indemnified Party
Indemnifying Party
Initial Cost Share Payment
Initiating Party
Joint Invention
JOT Co-Leader
Lead Transfer Activities
Lead Transfer Compound
Lead Transfer Plan
Members
Minimum Transfer Payment
Non-Acquired Party
Non-Breaching Party
Non-Defending Party
Non-Exclusive Conditions
Non-Exclusive Roche License
Non-Exclusive Trigger
Notice of Dispute
Optional Phase I Cohort(s)
Patent Challenge
Patent Challenge Notice
Patent Term Extensions
Payee
Payment Currency
Payor
Peremptory Notice Period
PII/Samples
pRED
Pre-Reserved Target
R&D Collaboration
Receiving Party

Section
22.2
22.4
22.4
11.4.4
(c)10.6.2(c)
22.4
3.7(a)(iii)3.7(a)(iii)
22.4
15.8
1.36
17.3
17.3
6.3.2(a)
15.6.2
1.85
7.11
1.146
1.147
1.148
7.3
20.3.5.4
20.2.3
20.2.1
15.7
20.3.1
2.3
20.3.1
22.2
6.1.1
20.2.6
15.10
15.9
13.2
12.3
13.2
20.2.1
20.3.5.4
3.9
3.7
3.3
1.28

Definition
Redacted Agreement
Relative Commercial Value
Roche
Roche Basel
Roche Continuation Notice
Roche Estimate
Roche Indemnitees
Roche Invention
Roche Response Date
Roche Transfer Activities
Roche US
Selected Target Transfer Activities
Selected Target Transfer Compound
Selected Target Transfer Plan
Sensitive Information
Settlement
Shared Product
Shared Product Questions
SPCs
Suit Notice
Target Nomination
VAT

Section
19.5(d)
11.4.4
cover page
cover page
3.8
10.6.2(a)
17.2
1.85
(a)10.6.2(a)
(d)20.3.5.4(d)
cover page
1.146
1.147
1.148
20.2.3
15.6
6.3.1.2
(a)10.6.2(a)
15.9
15.6
3.2
13.5

2. Grant of License
2.1 Research Cross License
Subject to the terms and conditions of this Agreement, each Party grants to the other Party during the R&D Collaboration Term a
non-exclusive right and license under Know-How and Patent Rights Controlled by such Party solely to enable the other Party to
perform its activities contemplated under the Research Plan under this Agreement for each Selected Target.

2.2 Commercial License

(a)

Subject  to  the  terms  and  conditions  of  this  Agreement  (including  Section  2.2(b)),  Dicerna  hereby  grants  to  Roche:  (x)  an
exclusive (even as to Dicerna) right and license under Dicerna’s interest in the Licensed IP, to research, have researched,
develop, have developed, register, have registered, make, have made, use, have used, register, have registered, sell, have
sold,  offer  for  sale,  import,  have  imported,  export  and  have  exported,  the  below  Compounds,  Products  and  Companion
Diagnostics which are solely with respect thereto in the Field (subject to (ii) below) in the Territory; and (y) non-exclusive
right  and  license  under  Dicerna’s  interest  in  the  Licensed  IP,  to  research,  have  researched,  develop,  have  developed,
register, have registered, make, have made, use, have used, register, have registered, sell, have sold, offer for sale, import,
have imported, export and have exported, the below Companion Diagnostics (other

than solely with respect to the below Compounds and Products) in the Field (subject to (ii) below) in the Territory.

(i)

(ii)

If the Compound, Product or Companion Diagnostic is Directed To a Viral Target, then such license granted by Dicerna
to Roche will be in the Field with respect to such Compound, Product or Companion Diagnostic.

If the Compound, Product or Companion Diagnostic is Directed To a Host Cell Factor Target, then for so long as such
Host Cell Factor Target is encumbered by rights granted to the Ex-Limited Licensee, such license granted by Dicerna
to Roche will be in the Limited Field with respect to such Compound, Product or Companion Diagnostic. If at any time
the Ex-Limited Licensee restrictions that keep Roche limited to such a Limited Field license no longer apply, then as of
such  time  Dicerna  hereby  grants  to  Roche  the  full  license  under  Section  2.2(a)(i)  and  Dicerna  shall  promptly  notify
Roche pursuant to Section 3.7(c)(ii).

(b)

The exclusivity of the above licenses is subject to the right of Dicerna and its respective Affiliates to Complete the Dicerna
Phase I Study, conduct its activities under the Research Plans and perform its Co-Promotion Right obligations (if any) for the
Co-Promotion Products in the US, to the extent expressly contemplated by this Agreement.

2.3 Non-Exclusive Roche License
In the event of a Non-Exclusive Trigger under Section 20.3.1, and with respect to a given Roche Compound, Roche Product or
Companion  Diagnostic  relevant  to  such  termination  (either  for  Agreement  termination  as  a  whole  or  with  respect  to  a  given
Selected Target for Selected Target termination), the non-exclusive license grant under Section 2.2(a)(y) shall continue as is and
the  exclusive  license  grant  under  Section  2.2(a)(x)  shall  continue  as  a  non-exclusive  license  grant  (collectively,  the  “Non-
Exclusive Roche License”).

2.4 Sublicenses

2.4.1 Right to Sublicense to its Affiliates
Roche shall have the right to grant sublicenses to its Affiliates (through multiple tiers), and to Chugai if Chugai is not an Affiliate
under this Agreement, under its rights granted under Sections 2.1, 2.2 and 2.3 without prior approval of Dicerna. If Roche grants a
sublicense permitted under this Section 2.4.1, Roche shall ensure that all of the applicable terms and conditions of this Agreement
shall apply to the Affiliate (and Chugai as applicable) to the same extent as they apply to Roche for all purposes. Roche assumes
full responsibility for the performance of all obligations and observance of all terms so imposed on such Affiliate (and Chugai as
applicable) and shall itself account to Roche for all payments due under this Agreement by reason of such sublicense.

2.4.2 Right to Sublicense to Third Parties
Subject to the terms of this Agreement, Roche and its Affiliates shall have the right to grant written sublicenses to Third Parties
(through multiple tiers) under its rights granted under Sections 2.2(a) and 2.3 without prior approval of Dicerna, with the proviso [*
* *]. Roche shall inform Dicerna promptly after the signature of aa sublicense agreement under this Section 2.4.2 and provide a
copy of each such agreement with a Third Party to Dicerna within [* * *] after execution thereof, which sublicense may be redacted
to  omit  any  terms  not  necessary  to  confirm  Roche’s  compliance  with  this  Section  2.4.2.  If  Roche  grants  a  sublicense  permitted
under this Section 2.4.2, Roche shall ensure that all of the applicable terms and conditions of this Agreement shall apply to the
Sublicensee to the same extent as they apply to Roche for all purposes. Roche assumes full responsibility for the performance of
all

obligations and observance of all terms so imposed on such Sublicensee and shall itself account to Dicerna for all payments due
under this Agreement by reason of such sublicense.

For  clarity,  without  Dicerna’s  prior  written  consent,  Roche  may  not  sublicense  to  non-Affiliate  entities  (i)  its  rights  granted  under
Section 2.1 and (ii) its rights and obligations to conduct its activities under the R&D Collaboration.

2.4.3 Right to Subcontract
Both  Parties  shall  have  the  right  to  subcontract  the  work  performed  under  this  Agreement  (subject,  in  the  case  of  Dicerna,  to
Section 10.6.4) without prior approval of the other Party, provided that (a) each Party will remain responsible for the work allocated
to  subcontractors  to  the  same  extent  as  if  it  had  done  such  work  itself,  and  (b)  each  Party’s  applicable  subcontracts  shall  be
consistent with its obligations to the other Party under this Agreement and to the extent applicable fulfill such Party’s obligation to
the  other  Party  to  comply  with  obligations  of  confidentiality  and  non-use  regarding  Confidential  Information  and  to  assign  such
Inventions required by this Agreement to be assigned to the other Party.

2.5    License Limitation
In  consideration  of  the  limitations  of  the  Roche  exclusivity  covenant  in  Section  3.9(b)(b),  Roche  agrees  that  during  the  R&D
Collaboration Term, the scope of the license rights (other than the Lead Compound) granted under Sections 2.1, 2.2, 2.3, and 2.4
to Roche are limited to [* * *].

2.6 Freedom-to-operate Licenses

2.6.1 Know-How
Roche hereby grants to Dicerna an irrevocable non-exclusive, worldwide, royalty-free license, with the right to sublicense, under
such  Roche  Know-How  as  Roche  may  provide  to  Dicerna  for  use  in  research,  development  and  commercialization  of
oligonucleotide  compounds.  Roche  shall  have  no  obligation  to  transfer  or  provide  any  information  or  materials  to  Dicerna  as  a
result of this Section 2.6.1 unless otherwise expressly agreed by Roche.

Dicerna hereby grants to Roche an irrevocable non-exclusive, worldwide, royalty-free license, with the right to sublicense, under
such  Dicerna  Know-How  as  Dicerna  may  provide  to  Roche  for  use  in  research,  development  and  commercialization  of
oligonucleotide  compounds.  Dicerna  shall  have  no  obligation  to  transfer  or  provide  any  information  or  materials  to  Roche  as  a
result of this Section 2.6.1 unless otherwise expressly agreed by Dicerna.

2.6.2 Mutual Use of Confidential Information
Subject to and without limiting any other license rights or exclusivity granted under this Agreement, Roche (and its Affiliates) and
Dicerna (and its Affiliates) will have the right to use any Confidential Information disclosed by the other Party in connection with the
R&D Collaboration and retained in the unaided memories of its employees after having access to such Confidential Information
(without reference to tangible copies of such information), provided that this right to use does not constitute a license under any
Patent Rights. [* * *].

2.6.3 GalXC Platform and Roche Background Patent Licenses
Subject  to  Section  3.9(b)(b)  and  the  license  granted  in  Section  2.2,  Roche  hereby  grants  back  to  Dicerna  a  non-exclusive,
worldwide, royalty-free license, with the right to sublicense through multiple

tiers,  under  Patent  Rights  invented  solely  by  Dicerna  during  the  R&D  Collaboration  specifically  claiming  Roche  Background
Improvements, to research, have researched, develop, have developed, register, have registered, make, have made, use, have
used, register, have registered, sell, have sold, offer for sale, import, have imported, export and have exported products.

Subject to Section 3.9(a)(a), Dicerna hereby grants back to Roche a non-exclusive, worldwide, royalty-free license, with the right
to  sublicense  through  multiple  tiers,  under  Patent  Rights  invented  solely  by  Roche  during  the  R&D  Collaboration  specifically
claiming GalXC Platform Improvements, to research, have researched, develop, have developed, register, have registered, make,
have  made,  use,  have  used,  register,  have  registered,  sell,  have  sold,  offer  for  sale,  import,  have  imported,  export  and  have
exported products.

3. R&D Collaboration
3.1
At any time after the Effective Date but in no case later than the Target Nomination Deadline, Roche will either

Initiation

(i) submit  to  Dicerna  in  writing  the  names  of  the  [*  *  *]  that  Roche  wants  to  nominate  as  the  initial  Selected  Targets  under  the

process described under Section 3.2,

(ii) provide written notice to Dicerna that Roche elects not to initiate the R&D Collaboration, or

(iii) provide written notice to Dicerna of termination of the Agreement without cause pursuant to Section 20.2.4.

In  the  event  of  either  clause  (ii)  or  (iii)  above,  the  R&D  Collaboration  will  not  commence,  the  remainder  of  this  Article  3  and  all
references to the R&D Collaboration in this Agreement will not apply, and Roche will receive no rights or licenses under Selected
Target Products.

3.2 Selected Target Nomination
Roche may nominate prior to the Target Nomination Deadline [* * *] initial Selected Targets (or up to five (5) total Selected Targets
as permitted under this Agreement) by utilizing the Gatekeeper Process designated as “Target Nomination”, with up to [* * *] of
the  Selected  Targets  being  Host  Cell  Factor  Targets.  Roche  may  replace  up  to  [*  *  *]  of  the  Selected  Targets  with  a  Reserved
Target once utilizing the replacement processes described in Section 3.6, where up to [* * *] of the Reserved Targets may be Host
Cell Factor Targets.

3.3 Scope
During  the  R&D  Collaboration  Term,  Roche  and  Dicerna  shall  conduct  a  mutually  agreed  discovery,  research  and  pre-clinical
development  collaboration  (prior  to  Development)  for  HBV  disease  therapies  (the  “R&D  Collaboration”)  with  the  goal  of
advancing lead candidates from each of Dicerna’s and Roche’s proprietary technology platforms Directed To the Selected Targets
from  which  one  or  more  Additional  Dicerna  Compounds  and/or  Roche  Compounds  may  be  generated  and  advanced  into
Development and eventually translated into Products for Commercialization by Roche. The activities conducted in connection with
the R&D Collaboration will be pursuant to individual Research Plans and will be overseen by the JRC. The Parties shall not work
on  more  than  [*  *  *]  Selected  Target  Research  Plans  at  a  given  time  without  the  written  agreement  of  both  Parties  (which  may
include approved JRC minutes). For avoidance of doubt, if the Parties (or JRC) agree to suspend activities on a given Selected
Target Research Plan, it shall not count as one of such [* * *].

3.4 Research Plans
Each Research Plan will outline the program and the work by the Parties to discover, research and pre-clinically develop (prior to
Development) Additional Dicerna Compounds and Roche Compounds Directed To the applicable Selected Target up to the point
of Clinical Candidate selection, as such plans may be updated from time to time as provided in this Agreement. Each Research
Plan  shall  also  include  the  plans  for  Roche  at  its  own  expense  to  either  initiate  or  further  pre-clinically  develop  (prior  to
Development) existing Roche Compounds Directed To the applicable Selected Target. Unless decided otherwise by the JRC, the
Research  Plan  for  each  Selected  Target  will  be  updated  annually  by  the  JRC.  Any  changes  shall  be  reflected  in  written
amendments  to  the  Research  Plans  approved  by  the  JRC.  Each  Research  Plan  will  set  forth:  (i)  the  scope  of  the  R&D
Collaboration  for  the  applicable  Selected  Target  broken  down  by  activities  for  Dicerna  Compounds  and  Roche  Compounds,  as
applicable,  and  the  resources  that  each  Party  will  dedicate  to  the  activities  contemplated  within  the  scope  of  the  R&D
Collaboration for such Dicerna Compounds and Roche Compounds, respectively; and (ii) specific objectives for each year, which
objectives will be updated or amended, as appropriate, by the JRC as research progresses and based on the applicable criteria
for selection of a Clinical Candidate. While each of the Dicerna and Roche teams shall primarily focus on the further research of
compounds derived from their respective proprietary platforms, certain activities leveraging unique capabilities and expertise of a
given Party may be applied to the Compounds generated by the other Party.

3.5

Information Exchange

3.5.1 Progress Reports
It  is  expected  that  the  Research  Plans  shall  be  conducted  as  a  joint  team  under  the  supervision  of  the  JRC.  Unless  otherwise
stated in the applicable Research Plan, each Party will only share data, information, results and output from in vitro and in vivo
studies prior to the time a Compound is selected by the JRC to progress to non-human primate studies. After such time , Dicerna
shall provide Roche with the chemistry and sequence information on the GalXC Molecule. Unless the JRC determines otherwise,
on  at  least  a  Calendar  Quarter  basis  during  the  R&D  Collaboration  Term,  each  Party  shall  prepare  and  provide  to  the  JRC  a
detailed  written  report  consistent  with  each  Party’s  internal  practices  summarizing  the  progress  of  the  work  performed  by  each
Party in the course of the R&D Collaboration during the preceding Calendar Quarter, and each Party will provide a final report to
the JRC at the end of a given Research Plan with respect to its activities under the Research Plan.

3.5.2 Research Records
Each Party shall maintain records of the R&D Collaboration (or cause such records to be maintained) consistent with such Party’s
internal practices that each Party determines in good faith records in sufficient detail and in good scientific manner the work done
and results achieved by or on behalf of such Party in the performance of the R&D Collaboration. All laboratory notebooks shall be
maintained  for  no  less  than  is  reasonably  necessary  to  comply  with  Applicable  Law  or  the  term  of  any  Patent  Rights  issuing
therefrom.

3.6 Replacement and Reserved Targets
Roche may only replace Selected Targets with a Reserved Target no more than [* * *] times during the R&D Collaboration Term,
as provided in this Section 3.6 and in Section 3.7 below. During the Target Term for a Selected Target, if no Compounds Directed
To  such  Selected  Target  are  generated  that  meet  the  criteria  for  Clinical  Candidate  selection  by  the  JRC  as  set  forth  in  the
applicable Research

Plan for such Selected Target and Roche requests in writing to replace such Selected Target with a Reserved Target, then such
Reserved Target shall be deemed a Selected Target in place of such prior Selected Target (and no longer a Reserved Target) and
the JRC shall develop a Research Plan for such replacement Selected Target no later than [* * *] after Roche’s written request for
replacement.

3.7 Gatekeeper Process
From the Effective Date until the end of the Target Nomination Deadline or last Target Term, whichever is later, Dicerna will keep
Roche informed of the identity and contact information for the Gatekeeper. The Parties agree the initial Gatekeeper will [* * *]. The
Parties will enter into a customary confidentiality agreement that includes confidentiality at least as stringent as the provisions set
forth  in  Article  19  and  prohibits  the  Gatekeeper  from  disclosing  to  Roche  the  Not  Available  Targets  or  from  disclosing  to  either
Dicerna or Roche the identity of a target that was the subject of inquiry by the other Party.

At the Effective Date, the Gatekeeper will have a list of Not Available Targets and from time to time thereafter (including at least [*
* *] per Calendar Quarter, including in response to inquiries hereunder), Dicerna will provide the Gatekeeper with an update to the
list  of  Not  Available  Targets,  together  with  any  applicable  rights  Dicerna  can  still  grant  hereunder  with  respect  to  such  Not
Available Targets, and any associated restrictions.

At the Effective Date, the Gatekeeper has confirmed [* * *] Host Cell Factor Target as a Reserved Target by letter dated October
28, 2019 (“Pre-Reserved Target”). Notwithstanding anything in this Agreement, including the right to select [* * *] initial Selected
Targets  under  Section  3.2  such  Pre-Reserved  Target  shall  remain  a  Reserved  Target  until  such  time  as  Roche  in  its  discretion
nominates it as a Selected Target.

The following are the Gatekeeper Processes to be followed with respect to target nomination (for Selected Targets) or for target
nomination (for Reserved Targets), subject to the restrictions in Sections 1.136 and 1.127.

(a) [* * *].

(b) [* * *].

(c) [* * *].

(d) [* * *].

3.8 Compound Progression
Subject to JRC decisions to the contrary, Research Plan activities for each Selected Target shall continue until the selection of a
Clinical  Candidate  from  the  overall  pool  of  Roche  Compounds  and  Additional  Dicerna  Compounds  on  a  Selected  Target-by-
Selected Target basis. The periodic review by the JRC of the results of the Research Plans will inform which Compounds to further
advance and whether to terminate development of certain Compounds and/or a Selected Target through appropriate amendments
to the Research Plans. The JRC shall decide which Compound(s) will be advanced into Development to be conducted and funded
by Roche with all remaining Compounds Directed To such Selected Target being reserved by Roche as backup Compounds and
included within the licenses granted to Roche under Section 2.2.

During  the  Target  Term,  the  JRC  will  make  plans  for  the  eventual  Selected  Target  Transfer  Activities  with  respect  to  Additional
Dicerna  Compounds  (and  if  applicable,  Roche  Compounds)  to  Roche  to  enable  Roche  to  timely  continue  advancement  of
Additional Dicerna Compounds, which Selected Target Transfer Activities will be conducted pursuant to a Selected Target Transfer
Plan approved by the JSC and as otherwise reasonably requested by Roche. Selected Target Transfer Activities set forth in the
given  Selected  Target  Transfer  Plan  will  be  provided  by  or  on  behalf  of  Dicerna  free  of  charge.  For  additional  Selected  Target
Transfer Activities reasonably requested by Roche not set forth in the given Selected Target Transfer Plan, Dicerna shall provide
up to [* * *] free of charge. Thereafter, additional hours will be provided at Roche’s expense based on Dicerna’s then current FTE
Rate and Roche will reimburse Dicerna for all of Dicerna’s reasonable out of pocket expenses incurred in connection therewith.

If  the  JRC  fails  to  select  a  Clinical  Candidate  for  a  given  Selected  Target  prior  to  the  expiration  of  the  Target  Term,  Roche  will
either  terminate  its  rights  to  Licensed  Products  under  Section  20.2.5  (and  such  Selected  Target  will  become  a  Discontinued
Target) or will notify Dicerna of its intention (“Roche Continuation Notice”) to proceed with the further research and development
of  Licensed  Products  for  such  Selected  Target  in  which  case  the  JRC  will  promptly  implement  the  associated  Selected  Target
Transfer  Plan.  If  Roche  has  provided  a  Roche  Continuation  Notice  and  fails  to  progress  a  Clinical  Candidate  Directed  To  such
Selected Target within [* * *], then Roche must terminate such Selected Target under Section 20.2.5 (and such Selected Target will
become a Discontinued Target).

3.9 Exclusivity
During the Exclusivity Period:

(a) Dicerna will collaborate exclusively with Roche in the discovery, research, and development of GalXC Molecules Directed To
Selected Targets in the Limited Field or if cleared pursuant to Section 3.7 the Field during the R&D Collaboration, other than as
may be incidental to research activities outside the scope of this Agreement.

(b) [* * *].

3.10 Research Plan Costs of Performance
Except as otherwise expressly set forth in this Agreement, in the applicable Research Plan or as otherwise agreed by the Parties
in writing, each Party shall bear its expenses conducting R&D Collaboration activities for a Selected Target during the applicable
Target Term as set forth in the applicable Research Plan.

4. Diligence
Roche  and  Dicerna  shall  use  Commercially  Reasonable  Efforts  to  perform  their  respective  activities  and  fulfil  their  respective
obligations contemplated by this Agreement or as may be agreed upon in any subsequent written agreements with respect to the
subject matter hereof. Examples of the foregoing include:

(a) Dicerna shall use Commercially Reasonable Efforts to Complete the Dicerna Phase I Study and to conduct the Lead Transfer

Activities in accordance with the Lead Transfer Plan (including any timelines therein);

(b) Roche  shall  use  Commercially  Reasonable  Efforts  to  Develop  and  Commercialize  at  least  one  (1)  Lead  Product  in  the

Territory;

(c) on  a  Selected  Target-by-Selected  Target  basis,  and  subject  to  the  JRC  deciding  to  stop  work  on  a  particular  class  of
compounds for a given Selected Target, both Roche and Dicerna shall use Commercially Reasonable Efforts to (i) discover,
research  and  pre-clinically  develop  (prior  to  Development)  at  least  one  (1)  Roche  Compound  and  Additional  Dicerna
Compound, respectively, as a Clinical Candidate, and (ii) perform their respective obligations under the applicable Research
Plan; and

(d) on  a  Selected  Target-by-Selected  Target  basis,  after  the  first  Clinical  Candidate  selection,  Roche  shall  use  Commercially
Reasonable Efforts to Develop and Commercialize at least one Selected Target Product or Hybrid Product. Roche’s efforts to
Develop  and  Commercialize  a  Selected  Target  Product  that  includes  a  Lead  Compound  or  Hybrid  Product  shall  satisfy  the
obligations of subsection (b) above if at any time after the Completion of a Phase II Study for the Lead Product Roche in its
good faith belief determines that continued Development and Commercialization of Product containing the Lead Compound as
either the sole active agent (or in combination only with an active agent other than a Compound) is scientifically or medically
unviable (or commercially unviable after First Commercial Sale of a Selected Target Product that includes a Lead Compound
or Hybrid Product).

5. Lead Transfer Activities
Lead Transfer Activities set forth in the Lead Transfer Plan will be provided by or on behalf of Dicerna free of charge. For all other
Lead Transfer Activities reasonably requested by Roche not set forth in the Lead Transfer Plan, Dicerna shall provide up to [* * *]
free of charge. Thereafter, additional hours for such Lead Transfer Activities not set forth in the Lead Transfer Plan will be provided
at Roche’s expense based on Dicerna’s then current FTE Rate and Roche will reimburse Dicerna for all of Dicerna’s reasonable
out of pocket expenses incurred in connection therewith.

6. Development
6.1 Development of Lead Product by Dicerna through Dicerna Phase I Study
Dicerna  shall,  at  its  sole  cost  (other  than  the  Optional  Phase  I  Cohorts(s),  if  applicable),  be  responsible  for  Completion  of  the
Dicerna  Phase  I  Study,  including,  upon  notification  to  the  JRC,  reasonable  amendments  to  the  existing  protocols  within  the
ordinary  course  of  business  that  are  not  material  deviations  other  than  as  required  by  Regulatory  Authorities  (with  any  such
material  deviation  amendments  proposed  by  Dicerna  requiring  approval  of  the  JRC  including  via  the  applicable  JOT).  Dicerna
shall  promptly  (i)  disclose  and  make  available  to  Roche  through  the  JRC  (including  via  the  applicable  JOT)  the  data  and
information reasonably requested by Roche about the Dicerna Phase I Study while on-going (for each time the data is analyzed,
blinded  or  unblinded  for  SRC  or  for  any  interim  analyses),  (ii)  upon  Roche’s  advance  written  request  (which  may  be  by  email),
permit  Roche  to  join  (in  person  or  by  teleconference)  as  a  non-participating  observer  in  meetings  between  Dicerna  and  the
principal  investigators  involved  in  the  Dicerna  Phase  I  Study  and  meetings  between  Dicerna  and  the  CRO(s)  involved  in  the
Dicerna  Phase  I  Study,  and  (iii)  if  and  to  the  extent  provided  in  the  Lead  Transfer  Plan,  provide  Roche  with  access  to  data
generated in connection with the Dicerna Phase I Study prior to and after Completion, in each case, on or after the Effective Date.

Dicerna shall also be responsible, at its sole cost, for completing all ongoing preclinical or other studies for the Lead Compound.
Dicerna  shall  disclose  and  make  available  to  Roche  through  the  JRC  (or  as  otherwise  requested  by  Roche)  all  data  and
information reasonably requested by Roche about such

preclinical  or  other  studies  associated  with  the  Lead  Compound  while  on-going,  including  any  safety  review  committee  output,
interim or preliminary results.

As  reasonably  necessary  for  Roche  to  continue  Development  of  the  Lead  Compound,  Dicerna  shall  conduct  the  Lead  Transfer
Activities. As part of the Lead Transfer Activities, Dicerna will cooperate with Roche and disclose and make available to Roche
copies of all data and information in Dicerna’s possession and Control regarding the Lead Compound and Lead Product which is
reasonably necessary for Roche’s Development of such Lead Product and in the timelines reasonably requested by Roche or as
set forth in the Lead Transfer Plan.

6.1.1 Optional Phase I Cohort(s)
Dicerna  will  prepare  and  file  a  protocol  amendment  for  the  Dicerna  Phase  I  Study  for  optional  additional  cohort(s)  (“Optional
Phase I Cohort(s)”) to explore different doses or dosing regimen. Such protocol amendments or Optional Phase I Cohort(s) may
be used for IND Filing. Dicerna will conduct the Optional Phase I Cohort(s) at Roche’s expense, however the study design and
cost will be mutually agreed by the Parties prior to initiation of the activities, otherwise Roche will have no obligation to fund and
Dicerna will have no obligation to conduct the Optional Phase I Cohort(s).

6.2 Development by Roche
Other than Dicerna’s development responsibilities listed in Section 6.1, Roche, at its sole cost and discretion (subject to Article 4
and  subject  to  discretion  limitations  and  cost  sharing  under  Dicerna’s  Cost  Share  Option),  shall  be  responsible  for  pursuing
Development of Products.

Roche  shall  maintain  records  of  its  Development  activities  (or  cause  such  records  to  be  maintained)  consistent  with  its  internal
practices.  Roche  shall  be  responsible  for  the  correct  use  of  Dicerna  PII/Samples  in  line  with  Applicable  Law  and  the  informed
consent  forms.  Notwithstanding  anything  to  the  contrary  in  this  Agreement  but  subject  to  Section  6.1  above  (and  except  with
respect to the Lead Compound and Lead Product if Dicerna exercises its Cost Share Option), Dicerna will not bear any costs or
expenses in connection with Development of Compounds or Products.

6.3 Dicerna Cost Share Option
Dicerna  shall  have  the  option  (the  “Cost  Share  Option”)  (unless  earlier  waived  in  accordance  with  this  Section)  to  share  in
Development Costs and thereby receive increased royalties in the US for the Shared Products as described in this Agreement (the
“Cost  Share  Right”).  For  so  long  as  Dicerna  has  the  Cost  Share  Option,  Roche  will  provide  to  Dicerna  through  the  JRC  the
current Development Plan and any updates and amendments thereto.

6.3.1 Option and Exercise

6.3.1.1 Roche Provision of Cost Share Package
Unless Dicerna earlier waives its Cost Share Option in writing, no later than at such time as Roche formally decides (based on
Roche’s then current internal governance decision-making process and committees) to proceed into the first Pivotal Study for the
Lead Product (or a Hybrid Product, as applicable), Roche shall provide to Dicerna a package (“Cost Share Package”) including
(i) relevant data from the previous Clinical Studies conducted by or on behalf of Roche, if not already shared, (ii) an accounting of
Roche’s  actual  Development  Costs  up  to  and  including  the  previous  Calendar  Quarter,  (iii)  a  copy  of  Roche’s  then-existing
proposed Development Plan for the Lead Product or Hybrid Product and (iv) for informational purposes only, Roche’s good faith,
non-binding forecast, made in accordance with its regular internal forecasting procedures, of all then planned project

Development Costs consistent with the Development Plan for the Lead Product or Hybrid Product (for clarity, the information that
Roche  provides  to  its  internal  decision-making  committee  for  the  purposes  of  deciding  whether  to  proceed  into  the  first  Pivotal
Study). Dicerna may ask reasonable questions concerning the contents of the Cost Share Package through the JRC and Roche
will make appropriate representatives available to provide answers to Dicerna’s questions.

6.3.1.2 Cost Share Option Exercise
Dicerna may exercise its Cost Share Option by providing written notice at any time within [* * *] of Dicerna’s receipt of the Cost
Share Package. In the event that at the time Roche provides Dicerna with the Cost Share Package, Roche’s internal governance
decision-making committee has not yet decided to proceed into the first Pivotal Study for the Lead Product, then such exercise by
Dicerna shall not be effective unless, within the [* * *] after such exercise, Roche notifies Dicerna that such internal governance
committee  decision  has  been  made  and  (a)  such  decision  is  consistent  with  the  plan  furnished  to  Dicerna  in  the  Cost  Share
Package, and (b) Roche notifies Dicerna of any updates or changes to the Cost Share Package, including any deviations from the
Development Plan. If such decision is then made by Roche but changes the plan furnished to Dicerna in the Cost Share Package,
Roche  shall  revise  the  Cost  Share  Package  and  deliver  it  to  Dicerna.  Dicerna  may  then  exercise  its  Cost  Share  Option  by
providing written notice at any time during the period commencing upon Dicerna’s receipt of the revised Cost Share Package and
ending thirty (30) days later. Commencing upon Dicerna’s exercise of its Cost Share Option and continuing until the end of the
Royalty Term unless and until Dicerna fails to meet its obligations under Section 6.3.2, (i) Dicerna shall have the Cost Share Right
and (ii) any Lead Product shall also be deemed as a “Shared Product”. Provided that Dicerna exercises its Cost Share Option for
the Lead Product, Dicerna shall also be granted a Cost Share Option for each subsequent Hybrid Product. The foregoing option
exercise procedure for the Lead Product shall also be applied for eligible Hybrid Products. Any Hybrid Product for which Dicerna
exercises its Cost Share Option shall be deemed a Shared Product.

6.3.2 Payments to Roche
If Dicerna exercises its Cost Share Option, then Dicerna will be responsible for [* * *] as follows:

(a) Dicerna will pay Roche [* * *] of Roche’s actual global Development Costs up to and including the last Calendar Quarter prior
to Dicerna’s exercise of the Cost Share Option (the “Initial Cost Share Payment”). Within [* * *] of Dicerna’s receipt of an
invoice from Roche, Dicerna may notify Roche in writing of its election to set off the Initial Cost Share Payment against the
payment from Roche to Dicerna for the Initiation of a Pivotal Study under Section 11.2.1, up to the full amount of the Initial
Cost Share Payment. To the extent the Initial Cost Share Payment will not be set off against the Initiation of a Pivotal Study
payment  under  Section  11.2.1,  Dicerna  will  pay  Roche  such  amount  within  [*  *  *]  of  Dicerna’s  receipt  of  an  invoice  from
Roche.

(b)

For  such  time  as  there  are  forecasted  Development  Costs,  Roche  shall  in  accordance  with  its  regular  internal  forecasting
processes and annual forecast cycle, provide Dicerna its forecast of all then planned project Development Costs for Shared
Product(s), including the forecasted budget for a given Calendar Year (“Annual Budget”) in final form within [* * *]. For such
time  as  there  are  Shared  Product(s),  Roche  shall  (a)  within  [*  *  *], give  Dicerna  preliminary  actual  Development  Costs  for
such Shared Product(s) for such Calendar Quarter and in the event of material changes, an updated Annual Budget for the
remainder  of  the  Calendar  Year  and  (b)  within  [*  *  *],  give  Dicerna  the  final  actual  Development  Costs  for  such  Shared
Product(s) for such Calendar Quarter.

(c)

(d)

For each Calendar Quarter (including the Calendar Quarter in which Dicerna exercised its Cost Share Option), within [* * *]
after Dicerna’s receipt of an invoice from Roche, Dicerna will make a payment to Roche for (i) with respect to Lead Products,
[* * *] of Roche’s actual Development Costs for the applicable previous [* * *] or (ii) with respect to Hybrid Products, [* * *] of
Roche’s actual Development Costs for the applicable previous [* * *].

In the event that actual Development Costs for a Calendar Year exceed the Annual Budget, including due to Extraordinary
Events, by more than [* * *], Dicerna’s portion of any such excess Development Costs be deferred and payable to Roche in
subsequent Calendar Years, with a maximum amount of such excess payable by Dicerna in a [* * *] not to exceed US dollars
[*  *  *].  For  the  avoidance  of  doubt,  the  maximum  amount  of  Development  Costs  to  be  paid  by  Dicerna  after  the  end  of  a
Calendar  Year  (but  subject  to  additional  deferred  payments  by  Dicerna)  shall  be  [*  *  *]  of  Dicerna’s  portion  of  the  Annual
Budget. By way of example, if the Annual Budget for the year 2022 is [* * *] with Dicerna’s portion thereof equaling [* * *] and
the FDA requires an additional arm be included in a Pivotal Study with the estimated costs for Calendar Year 2022 for such
additional  arm  equaling  [*  *  *]  and  actual  Development  Costs  incurred  by  Roche  for  Calendar  Year  2022  (including  the
additional  arm)  total  [*  *  *]  then  Dicerna’s  total  Development  Costs  payable  to  Roche  shall  [*  *  *]  of  which  [*  *  *]  shall  be
payable by Dicerna within [* * *] after the end of 2022 and the remaining [* * *] shall be deferred and payable in [* * *] equal
installments of [* * *] each after the end of [* * *], respectively.

(e)

Invoices submitted by Roche to Dicerna for Development Cost reimbursement will set forth in reasonable detail such costs
and  expenses  to  be  reimbursed,  which  costs  and  expenses  shall  be  specifically  identifiable  or  reasonably  allocable  to  the
conduct  of  Shared  Product  Development  Costs  as  determined  in  accordance  with  the  applicable  Accounting  Standard,
including any amounts that may be deferred into the following year.

6.3.3 Adjustment of Royalty Rate for Shared Product US Net Sales
If Dicerna exercises its Cost Share Option and maintains its Cost Share Right by payment of its portion of the Development Costs,
then the royalty rate for the Shared Product shall be increased in accordance with Section 11.4.2.1.

6.4 Updates
Roche shall provide an annual written report to Dicerna to update Dicerna with a summary based on information Roche provides
to  its  internal  management  as  to  Development  progress  for  each  Licensed  Product,  including  all  preclinical  and  clinical
development activities. Roche will provide notice and further information regarding changes to such annual reports with respect to
such  Licensed  Products  through  the  JSC  (as  applicable)  in  accordance  with  Section  7.10  and  Roche’s  Alliance  Director  in
accordance with Section 7.12.

7. Governance
7.1
Within [* * *] after the Effective Date, the Parties shall establish a JRC to perform the functions described herein, including

Joint Research Committee

(i) monitor  the  Dicerna  Phase  I  Study  until  Completion  (which  may  be  conducted  by  a  JOT  established  by  the  Parties  on

behalf of the JRC prior to the first meeting of the JRC),

(ii) develop, approve and update each Research Plan for each Selected Target,
(iii) oversee the R&D Collaboration (upon start of the R&D Collaboration Term),

(iv) establish, revise and implement the Transfer Plans, provided that all updates to the Lead Transfer Plan require Dicerna’s

written approval or approved JRC minutes, and

(v) share the results of Roche’s Development of the Lead Product or Hybrid Product until Dicerna either exercises or fails to

exercise its Cost Share Option.

Joint Steering Committee

7.2
Within [* * *] of Dicerna’s receipt of the Cost Share Package, the Parties shall establish a JSC. If Dicerna exercises its Cost Share
Option, the JSC shall oversee the global Development activities for Shared Products and, if Dicerna exercises its Co-Promotion
Option, Co-Promotion activities in the US for Co-Promotion Products. If Dicerna does not exercise its Cost Share Option, the JSC
and  Roche’s  Alliance  Director  shall  be  primarily  responsible  for  information  exchange  between  the  Parties  concerning  Roche’s
continued Development and Commercialization of the Lead Product as set forth herein.

7.3 Members
The JRC and JSC shall each be composed of [* * *] persons (“Members”). Roche and Dicerna each shall be entitled to appoint [*
* *] Members with appropriate seniority and functional expertise. Each Party may replace any of its Members and appoint a person
to fill the vacancy arising from each such replacement. A Party that replaces a Member shall notify the other Party at least [* * *]
prior to the next scheduled meeting of the applicable Committee. Both Parties shall use reasonable efforts to keep an appropriate
level of continuity in representation. Both Parties may invite a reasonable number of additional experts and/or advisors to attend
part  or  the  whole  Committee  meeting  with  prior  notification  to  the  applicable  committee.  Members  may  be  represented  at  any
meeting by another person designated by the absent Member. The JSC shall be chaired by a [* * *] Member (“Chairperson”). The
initial Chairperson of the JRC shall be a [* * *] Member and shall thereafter [* * *].

7.4 Meetings
The  Chairperson  for  a  given  Committee  or  his/her  delegate  will  be  responsible  for  sending  invitations  and  agendas  for  all  such
Committee  meetings  to  all  Members  at  least  [*  *  *]  before  the  next  scheduled  meeting  of  the  Committee.  The  venue  for  the
meetings  shall  be  agreed  by  the  Committee.  Each  Committee  (after  its  formation  in  accordance  with  Section  7.1  or  7.2,  as
applicable) shall hold meetings at least [* * *] per Calendar Year, either in person or by tele-/video-conference, and in any case as
frequently  as  the  Members  of  the  applicable  Committee  may  agree  shall  be  necessary,  but  not  more  than  four  times  a  year,
provided that such limit shall not apply to meetings held following a material change to the Development or Commercialization of a
Lead Product or Hybrid Product that occurs between planned annual updates at the JSC in accordance with Section 7.10. The
Alliance Director of each Party may attend the JSC meetings as a permanent participant.

7.5 Minutes
The Chairperson of a given Committee will be responsible for designating a Member to record in reasonable detail and circulate
draft minutes of the Committee meetings to all members of the Committee for comment and review within [* * *] after the relevant
meeting. The Members of the Committee shall have [* * *] to provide comments. The Party preparing the minutes shall incorporate
timely received comments and distribute finalized minutes to all Members of the Committee within [* * *] of the relevant meeting.
The Chairperson approves the final version of the minutes before its distribution.

7.6 Responsibilities of the JRC
The JRC shall have the responsibility and authority to: [* * *]

The JRC shall have no responsibility and authority other than that expressly set forth in this Section such as to unilaterally impose
financial or manpower obligations on either Party.

7.7

JRC Decisions

7.7.1 Decision Making Authority
The JRC shall decide matters within its responsibilities set forth in Section 7.6.

7.7.2 Consensus; Good Faith
The Members of the JRC shall act in good faith to cooperate with one another and seek agreement with respect to issues to be
decided by the JRC. The Parties shall endeavor to make decisions by consensus with each Party having one (1) vote.

7.7.3 Failure to Reach Consensus
If the JRC is unable to decide a matter by consensus:

(a) Dicerna shall be responsible for [* * *].

(b) Roche shall have the final decision authority on [* * *].

Any such decision shall constitute a decision of the JRC.

7.8

JSC Responsibilities and Decision Making for Shared Product Development

7.8.1 JSC Responsibilities

With  respect  to  Shared  Product  Development,  the  role  of  the  JSC  shall  be  to  oversee  and  manage  the  global  Development
activities  of  Shared  Products,  which  oversight  and  management  shall  be  in  alignment  with  Roche’s  then  current  procedures  as
they would apply to an internal Roche development program at the equivalent stage of development having a similar commercial
value, subject to the obligations set forth in this Agreement. The JSC may establish and oversee JOTs as applicable to Shared
Product Development. In particular with regard to Shared Product Development, the JSC’s primary activities shall include: [* * *]

The JSC shall have no responsibility and authority other than that expressly set forth in this Section.

7.8.2JSC Decision Making
The Members of the JSC shall act in good faith to cooperate with one another and seek agreement with respect to issues to be
decided by the JSC concerning Shared Product Development. The Parties shall endeavor to make decisions by consensus with
each Party having one (1) vote.

7.8.3 Failure to Reach Consensus

(a) Subject  to  Section  7.8.3(b),  if  the  JSC  is  unable  to  decide  a  matter,  the  resolution  and/or  course  of  conduct  shall  be
determined by Roche, in its sole discretion; provided that, Roche shall not have the authority to make any decision without the
consent of Dicerna that would result in an increase in Dicerna’s patent infringement risk under this Agreement.

(b) If the JSC cannot resolve an issue which relates to:

(i) continuing or discontinuing the [* * *];

(ii) continuing or discontinuing any [* * *];

(iii) a decision to [* * *]; or

(iv) a decision to pursue or not to pursue a [* * *],

then the JSC (or either Party’s members thereof) may refer such dispute to [* * *]. Any such decision shall constitute a decision
of the JSC.

JSC Responsibilities and Decision Making for Co-Promotion Products

7.9
The  provisions  of  this  Section  7.9  apply  only  with  respect  to  Co-Promotion  Products  during  such  time  as  Dicerna  has  a  Co-
Promotion Right in the US for such Co-Promotion Products.

7.9.1 JSC Responsibilities

With respect to Co-Promotion activities, the role of the JSC shall be to oversee and coordinate the US Co-Promotion activities in
the  US  for  Co-Promotion  Products  in  accordance  with  the  Co-Promotion  Agreement.  For  Co-Promotion  Products,  the  JSC  will
have  responsibility  for  reviewing  the  Commercialization  Plan  from  time  to  time  as  necessary  for  the  purpose  of  considering
appropriate amendments thereto.

7.9.2 JSC Decision Making
The Members of the JSC shall act in good faith to cooperate with one another and seek agreement with respect to issues to be
decided  by  the  JSC  concerning  Co-Promotion  of  Co-Promotion  Products.  The  Parties  shall  endeavor  to  make  decisions  by
consensus with each Party having one (1) vote.

7.9.3 Failure to Reach Consensus
If  the  JSC  is  unable  to  decide  a  matter  regarding  Co-Promotion  of  Co-Promotion  Products,  then  the  JSC  (or  either  Party’s
members thereof) may refer such dispute to [* * *], subject to the terms of this Agreement and the Co-Promotion Agreement.

7.10 JSC Responsibilities for Roche Sole Development/Commercialization of Lead Product and Hybrid Product
During the lifetime of the JSC pursuant to Section 7.15, the JSC shall be a forum for information exchange from Roche to Dicerna
on  the  status  of  Development  and  Commercialization  of  the  Lead  Product  and  Hybrid  Products  if  Dicerna  does  not  exercise  its
Cost  Share  Option.  Through  the  JSC,  Roche  shall  provide  updates  regarding  (i)  Development  of  the  Lead  Product  and  Hybrid
Product in accordance with Section 6.4 including progress since the last update and (ii) Commercialization of the Lead Product
and  Hybrid  Product  in  accordance  with  Section  10.3.  Such  updates  shall  be  consistent  with  the  information  Roche  provides  its
internal  management  on  Lead  Products.  In  the  event  of  a  material  change  to  the  Development  or  Commercialization  of  a  Lead
Product or Hybrid Product that occurs between planned annual updates at the JSC, Roche’s Alliance Director shall timely inform
Dicerna of such change after which the Parties may decide whether an ad hoc JSC meeting should be scheduled. Where there is
no JSC, updates on the Lead Product will be provided through the Alliance Director in accordance with Section 7.12.

7.11 Joint Operational Teams
Each  Committee  may  establish  JOTs  from  time-to-time,  with  a  defined  scope  and  duration,  to  carry  out  the  activities  of  such
Committee. Each of the JOTs shall be composed of representatives designated by each Party and the Parties need not have the
same  number  of  representatives.  The  JOTs  shall  include  individuals  with  expertise  and  responsibilities  appropriate  (in  terms  of
their seniority, availability, function in their respective organizations, training and experience) for the tasks then being undertaken
and the stage of the research, manufacture, development and commercialization of applicable Compounds and Products for which
joint activities will be performed. Each Party shall designate one of its representatives as its primary contact for all JOT matters
(such  Party’s  “JOT Co-Leader”).  A  Party  may  replace  any  or  all  of  its  representatives  (and  designated  JOT  Co-Leader)  at  any
time by informing the other JOT Co-Leader in advance, in writing (which may be by email). Roche’s JOT Co-Leader for a given
JOT shall be responsible for keeping minutes of any JOT meetings that record in writing all decisions made, action items assigned
or completed, and other appropriate matters. Meeting minutes shall be sent to both Parties within [* * *] after a meeting for review,
comment and approval by each Party.

7.12 Alliance Director

Each Party shall appoint one person to be its point of contact with responsibility for facilitating communication and collaboration
between  the  Parties  (each,  an  “Alliance  Director”).  The  Alliance  Directors  shall  be  permanent  participants  of  the  Committee
meetings (but not members of the Committee) and may attend JOT meetings as appropriate. The Alliance Directors shall facilitate
resolution of potential and pending issues and potential disputes to enable the Committees to reach consensus and avert potential
disputes.  The  Alliance  Director  will  be  the  point  of  contact  for  communicating  regular  updates  and  shall  provide  such  regular
updates about Development and Commercialization for Licensed Products except where updates are otherwise handled by the
JSC  in  accordance  with  this  Agreement.  Upon  Dicerna’s  request,  the  Alliance  Director  shall  discuss  and  answer  Dicerna’s
reasonable  questions  regarding  the  information  received  from  Roche  under  Sections  6.4  and  10.3.  In  the  event  of  a  material
change to the Development or Commercialization of a Licensed Product, Roche’s Alliance Director shall timely inform Dicerna of
such change in accordance with Sections 6.4, 7.10, and 10.3, and to the extent the JSC does not meet to discuss such material
change or there is no JSC, Roche’s Alliance Director shall discuss such change with Dicerna and provide further information as
may be reasonably requested by Dicerna regarding such change.

7.13 Limitations of Authority
No Committee shall have the authority to amend or waive any terms of this Agreement.

7.14 Expenses
Each Party shall be responsible for its own expenses including travel and accommodation costs incurred in connection with the
Committees.

7.15 Lifetime of JRC and JSC
The JRC shall exist until the later of (i) the end of the R&D Collaboration Term unless terminated earlier (or if it does not come into
existence), (ii) the expiration of Dicerna’s Cost Share Option without Dicerna exercising its Cost Share Option and (iii) if Dicerna
exercises  its  Cost  Share  Option,  the  timely  transfer  of  Cost  Share  Option  activity  oversight  to  the  JSC.  The  JSC  shall  exist  for
such time as (x) there is a Shared Product that Dicerna is co-funding or Dicerna is Co-Promoting Co-Promotion Products under its
Co-Promotion Right, and otherwise (y) until the earlier of the [* * *] anniversary of the First Commercial Sale of the Lead Product in
the Territory or Roche’s termination of Development or Commercialization of the Lead Product. In addition, if Dicerna becomes an
Acquired  Party,  Roche  may  restrict  Dicerna’s  participation  in  the  JSC  in  accordance  with  and  subject  to  the  limitations  in
Section  20.2.3.  Following  any  automatic  cessation  or  earlier  disbandment  of  a  Committee,  the  Committee  shall  have  no  further
obligations under this Agreement and shall perform no further functions hereunder unless and until relevant activities commence
in the future (in which case the Committee shall be reconstituted).

8. Manufacture and Supply
8.1 Dicerna Phase I Study
Dicerna shall have responsibility at its own expense for the clinical supply of the Lead Product for the Dicerna Phase I Study.

8.2 R&D Collaboration
During the Target Term with respect to Compounds Directed To a given Selected Target, except where otherwise set forth in the
applicable Research Plan, Dicerna shall have responsibility at its own expense for the supply of Additional Dicerna Compounds for
use in research activities conducted by Dicerna

up to Initiation of GLP Tox Study for such Compound. Roche shall pay Dicerna’s fully burdened manufacturing costs for supply of
Additional Dicerna Compounds as requested by Roche for use in activities that will occur after Initiation of GLP Tox Study, and
otherwise Roche shall have responsibility at its own expense for the supply of all Compounds, in each case for use in the R&D
Collaboration. For avoidance of doubt, any supply of Additional Dicerna Compounds by Dicerna to Roche prior to the Initiation of
GLP  Tox  Study  for  use  in  or  after  the  Initiation  of  GLP  Tox  Study  (including  manufacturing  reservation  and  cancelation  fees
incurred under the Research Plan), shall be reimbursed to Dicerna by Roche. During the Target Term Dicerna shall provide Roche
with  reasonable  access  during  Dicerna’s  business  hours  to  employees  and  Third  Party  CROs  with  relevant  subject  matter
expertise to answer questions and assist Roche in potential preparation for Dicerna Selected Target Transfer Activities.

8.3 Roche Responsibilities
Other  than  Dicerna’s  supply  responsibilities  under  Sections  8.1  and  8.2  and  Dicerna’s  Transfer  Activities  (and  subject  to
Section 6.3), (i) Roche shall otherwise be solely responsible at its own expense for the manufacture and supply of all pre-clinical
and  clinical  supplies  of  Compounds  and  Products,  either  by  itself  or  through  Third  Parties,  and  (ii)  Roche  shall  be  solely
responsible at its own expense for the commercial manufacture and commercial supply of Lead Products for sale in the Territory,
either  by  itself  or  through  Third  Parties.  After  the  Effective  Date,  Roche  will  commence  technical  development  in  order  to  have
established required processes and material for Roche’s Development needs.

8.4 Transfer Activities for Manufacturing

8.4.1 Lead Transfer Activities
As part of the Lead Transfer Activities for manufacturing, and in order to help establish the start of Roche’s production processes
as soon as practicable, Dicerna shall supply Roche with [* * *] of the Lead Compound for solubility, stability testing, other technical
development activities and non-clinical drug development activities and offer such other assistance as Roche reasonably requests
after the Effective Date. Roche will not use such samples in humans. [* * *].

As  soon  as  practicable  after  the  Effective  Date,  Dicerna  will  provide  Roche  with  the  chemical  raw  materials  (“Chemical  Raw
Materials”) identified in the Lead Transfer Plan or as otherwise reasonably requested by Roche, which are reasonably necessary
for Roche’s technical development and manufacturing of Roche’s own material that will be used for Roche Development. Dicerna
and  Roche  will  timely  liaise  about  the  demand-supply  setup  for  these  Chemical  Raw  Materials  for  ensuring  timely  supply  and
availability of sufficient amounts in order to keep up with Roche Development timelines.

As soon as practicable after the Effective Date and if necessary as soon as practicable after Completion of the Dicerna Phase I
Study  (recognizing  Dicerna’s  responsibilities  in  Completion  of  the  Dicerna  Phase  I  Study),  Dicerna  shall  initiate  remaining  Lead
Transfer Activities associated with CMC and manufacturing, which may include providing reasonable assistance to enable Roche
(or Roche’s designee(s)) to manufacture Lead Transfer Compounds and Lead Products and obtaining all necessary Regulatory
Approvals or modifying existing Regulatory Approvals for the manufacture by Roche, including by reviewing and commenting on
documents  to  be  submitted  by  Roche  to  a  Regulatory  Authority,  upon  reasonable  request  from  Roche.  Dicerna  shall  use
reasonable efforts to maintain in full force and effect agreements and relationships with Third Parties in effect as of the Effective
Date  so  that  Roche  has  access  to  non-clinical  and  clinical  supply,  as  reasonably  requested  by  Roche,  prior  to  and  during  any
manufacturing transition from Dicerna to Roche.

Unless otherwise specified in this Agreement or the Lead Transfer Plan or as agreed to by the Parties, the following shall apply:
shipment of Chemical Raw Materials and any other Materials that Dicerna or Dicerna’s designees are to provide to Roche shall be
shipped free of charge DAP Roche Basel or Roche’s designee (Incoterms 2010).

8.4.2 Selected Target Transfer Activities
Prior to selection of a presumed-to-be Clinical Candidate, the JRC may permit Dicerna to manufacture quantities of the applicable
Additional  Dicerna  Compound,  at  Roche’s  expense  at  Dicerna’s  fully  burdened  Manufacturing  cost,  in  preparation  for  or  use  in
cGLP toxicology studies to commence after selection by the JRC of such Clinical Candidate, in which case Dicerna shall invoice
Roche after each Calendar Quarter in which Dicerna supplies such Additional Dicerna Compounds with a description the amounts
supplied in reasonable detail, and Roche shall pay each such invoice within [* * *] after receipt. Dicerna shall initiate the Selected
Target Transfer Activities within [* * *] of the selection of a Clinical Candidate for a given Selected Target (or as otherwise may be
set forth in an applicable Selected Target Transfer Plan) to enable Roche (or Roche’s designee(s)) to manufacture the Selected
Target  Transfer  Compounds.  Unless  specifically  requested  by  Roche  or  as  otherwise  stated  in  the  applicable  Selected  Target
Transfer  Plan,  Dicerna  shall  use  reasonable  efforts  to  maintain  in  full  force  and  effect  agreements  and  relationships  with  Third
Parties in effect as of the Effective Date so that Roche has access to non-clinical supply prior to and during any manufacturing
transition from Dicerna to Roche.

9. Regulatory
9.1 Dicerna Responsibility
Prior to Completion of the Dicerna Phase I Study, [* * *].

During such time:

(a) In consultation with Roche, Dicerna shall use Commercially Reasonable Efforts to make a submission for an IND in the US

with the FDA by [* * *].

(b) Roche shall have the right to reasonably attend regulatory interactions (including face-to-face meetings and phone calls) with
Regulatory Authorities for the Lead Product to the extent permitted by Applicable Law. Dicerna shall give notice of any such
meeting within [* * *] after Dicerna first receives notice of the scheduling of such meeting. In addition, Roche may participate in
any preparatory pre-meetings held prior to a Regulatory Authority meeting.

(c) Dicerna  will  coordinate  with  Roche  on  its  material  communications  with  and  material  Regulatory  Materials  submitted  by
Dicerna  to  any  Regulatory  Authority  in  connection  with  the  Lead  Product  and  Dicerna  Phase  I  Study,  including  all  CTA
submissions,  CTA  amendments,  Regulatory  Authority  meeting  requests  and  Regulatory  Authority  advice  (including  scientific
advisory  packages).  In  particular  Dicerna  shall  provide  copies  of  draft  Regulatory  Authority  meetings  requests,  Regulatory
Authority advice (including scientific advisory packages) and any other material submissions and communications (including
written  summaries  of  material  oral  communications  proposed  or  conducted  by  or  on  behalf  of  Dicerna)  with  any  Regulatory
Authority pertaining to the Lead Compound or Lead Product sufficiently in advance, where reasonable, for Roche to comment
on any such Regulatory Materials or communications with any Regulatory Authority, and Dicerna shall give due consideration
in  good  faith  to  any  comments  provided  by  Roche  in  relation  to  such  Regulatory  Materials  or  communications  with  any
Regulatory Authority. As used in this

Section 9.1(c), material communications include all formal communications or communications that impact the Dicerna Phase I
Study.

9.2 Transfer to Roche
The  following  shall  be  part  of  the  Lead  Transfer  Activities,  specifically  with  respect  to  regulatory  affairs.  All  such  Lead  Transfer
Activities shall commence in accordance with the timeline in the Lead Transfer Plan or as otherwise reasonably practical (in view
of the Dicerna Phase I Study) to facilitate Roche’s preparation for continued Development of the Lead Compound.

After Roche’s reasonable request (unless not allowed by Applicable Law) or in accordance with the Lead Transfer Plan, Dicerna
shall  use  reasonable  efforts  to  transfer  sponsorship  of  the  existing  CTAs  to  the  Roche  Affiliate  designated  by  Roche,  and  the
Parties  will  cooperate  to  draft  and  execute  the  necessary  documents  required  to  effect  such  transfer.  Prior  to  the  CTA  transfer,
Dicerna  shall  provide  to  Roche  copies  of  all  material  correspondence  with  the  Regulatory  Authorities.  For  all  completed  study
reports,  Dicerna  shall  provide  reasonably  necessary  documentation  to  confirm  data  reliability,  as  required  by  Article  43  of  the
Japanese Pharmaceutical Affairs Law Enforcement Regulations and related notifications, including original author signatures, raw
data lists, cGLP and GCP compliance information. All documentation will be provided in English.

After  Roche’s  reasonable  request  or  as  in  accordance  with  the  Lead  Transfer  Plan,  Dicerna  shall  transfer  to  Roche  all  relevant
historical  clinical  safety  data.  Safety  information  on  serious  adverse  events  shall  be  provided  in  CIOMS  format  and  safety
information  on  non-serious  adverse  events  shall  be  provided  in  English  Line  Listing  format,  inclusive  of  source  documentation
(e.g. lab data, discharge forms etc.).

9.3 Roche Responsibility
Other than Dicerna’s rights and obligations for regulatory activities set forth in this Article 9 (and subject to Section 6.3), Roche
shall  be  solely  responsible  at  its  own  expense  for  all  regulatory  affairs  related  to  Compounds  and  Products  in  the  Territory
including the preparation and filing of applications for Regulatory Approval, as well as any or all governmental approvals required
to develop, have developed, make, have made, use, have used, manufacture, have manufactured, import, have imported, sell and
have sold Products. Roche shall be responsible for pursuing, compiling and submitting all regulatory filing documentation, and for
interacting with regulatory agencies, for all Products in all countries in the Territory. Roche or its Affiliates shall own and file in their
discretion all regulatory filings and Regulatory Approvals for all Products in all countries of the Territory.

9.4 Reporting Adverse Events
Each Party will promptly disclose to the other Party during the Agreement Term information in such Party’s possession and control
concerning  side  effects,  injury,  toxicity  or  sensitivity  reaction  and  incidents  or  severity  thereof  in  humans  with  respect  to  any
Licensed Product.

After the transfer of historical clinical safety data from Dicerna (including adverse events, discontinuations, laboratory data, ECGs
and vital signs), Roche or its designated Affiliate, at its sole cost, shall report to appropriate authorities in accordance with local
requirements all adverse events related to use of the Products in the Territory.

9.4.1 Pharmacovigilance Agreement
If  requested  by  a  Party  or  as  otherwise  required  by  Applicable  Law,  the  Parties  shall  execute  one  or  more  separate
Pharmacovigilance Agreement(s) which set forth the responsibilities and obligations

of the Parties with respect to the procedures and timeframes for compliance with all Applicable Laws pertaining to safety reporting
and their related activities of the (i) applicable Product(s) in the Territory, (ii) responsibilities of Dicerna and Dicerna’s Third Party
licensees  with  respect  to  other  GalXC  Molecules,  and  (iii)  if  Dicerna  exercise  its  Co-Promotion  Option,  in  connection  with
Dicerna’s Co-Promoting of the Co-Promotion Products in the US.

10. Commercialization
10.1 Generally
Subject to Dicerna’s Co-Promotion Option and subject to Article 4, Roche, at its own expense, shall have sole responsibility and
decision making authority for the marketing, promotion, sale and distribution of Products in the Territory.

10.2 Booking of Sales; Distribution
Roche  shall  have  the  sole  right  to  (a)  invoice  and  book  sales  of  Products,  establish  all  terms  of  sale  (including  pricing  and
discounts),  warehouse  and  distribute  Products  in  the  Territory  and  to  perform  or  cause  to  be  performed  all  related  services,
(b) handle all order processing, invoicing, collection, distribution, reimbursement services and inventory management with respect
to  such  Products  in  the  Territory,  (c)  handle  all  returns,  recalls  or  withdrawals  with  respect  to  any  Product  in  the  Territory,
(d)  handle  all  payer/distributor  account  management  with  respect  to  any  Product  in  the  Territory,  and  (e)  manage  all  aspects  of
contracting with providers, distributors, managed care vendors or payers with respect to any Product in the Territory.

10.3 Updates other than Co-Promotion Products in the Co-Promotion Territory
Except  as  otherwise  set  forth  in  Section  7.10,  upon  request  of  Dicerna,  Roche  shall  update  Dicerna  regarding  the
Commercialization  of  Products  in  the  Territory  (other  than  Co-Promotion  Products  in  the  Co-Promotion  Territory)  by  Roche,  its
Affiliates and Sublicensees. If Dicerna requests an update, Roche shall provide a high-level summary, in writing and/or through a
meeting  (face  to  face/  tele-presence/videoconference  or  telephone).  Dicerna  shall  not  request  an  update  more  frequently  than
once per Calendar Year.

10.4 Product Trademarks
Roche  shall  have  the  sole  right  and  responsibility  to  determine  the  Product  trademarks  to  be  used  with  the  Products  on  a
worldwide basis and to own such trademarks in accordance with Section 15.2, provided that if applicable Roche shall include in
Co-Promotion Product labeling in the US appropriate reference to Dicerna’s company trademark(s). Neither Party shall, nor shall
either Party permit its Affiliates or Sublicensees to (a) use in their respective businesses, any trademark that is confusingly similar
to,  misleading  or  deceptive  with  respect  to  or  that  dilutes  any  (or  any  part)  of  the  Product  trademarks,  or  (b)  do  any  act  which
endangers, destroys or similarly affects, in any material respect, the value of the goodwill pertaining to the Product trademarks.
Each Party agrees to conform (x) to the customary industry standards for the protection of Product trademarks for pharmaceutical
products and such guidelines of Roche with respect to manner of use (as provided in writing by Roche) of the Product trademarks
and (y) to maintain the quality standards of Roche with respect to the goods sold and services provided in connection with such
Product  trademarks.  Neither  Party  shall  do  any  act  which  endangers,  destroys  or  similarly  affects,  in  any  material  respect,  the
value of the goodwill pertaining to the Product trademarks.

10.5 Product Labeling; Markings and Co-Branding

Roche  shall  own  and  be  responsible  for  all  Product  Labeling  for  all  Products  in  accordance  with  the  terms  of  this  Agreement
including,  for  Co-Promotion  Products,  Sections  10.4  and  15.2.  Roche  will  comply  with  all  Applicable  Law  relevant  to  patent
marking and the Parties shall work together to include all relevant Patent Rights for such marking.

10.6 Dicerna US Co-Promotion Option

10.6.1 Option
If  Dicerna  exercises  its  Cost  Share  Option,  then  Dicerna  also  shall  have  the  option  (the  “Co-Promotion  Option”)  to  assume
between [* * *] of the total sales force for each Shared Product measured in terms of Sales Representatives in the Co-Promotion
Territory  (the  “Co-Promotion  Right”).  The  Parties  shall  agree  to  a  specific  percentage  within  this  range  as  part  of  the  Co-
Promotion Agreement. Notwithstanding the foregoing, Shared Products that are Combination Products containing an Encumbered
Combination Agent are not subject to the Co-Promotion Option and Co-Promotion Right set forth herein.

10.6.2 Notice and Exercise

(a) Approximately [* * *] before the anticipated filing of the first MAA for a given Shared Product, Roche will deliver and present to
and  discuss  with  the  JSC  the  applicable  Commercialization  Plan,  including  Roche’s  preliminary  estimate  of  the  number  of
Sales  Representatives  it  anticipates  for  such  Shared  Product  for  such  launch  in  the  Co-Promotion  Territory  (the  “Roche
Estimate”).  In  addition  to  information  received  through  the  JSC,  Dicerna  may  submit  written  questions  to  Roche  about  the
Commercialization  Plan  for  such  Shared  Product  (“Shared  Product  Questions”)  within  [*  *  *]  of  the  receipt  of  such  Roche
Estimate, in which case Roche will respond to such timely-delivered questions no later than [* * *] from receipt of Dicerna’s
questions  (the  date  of  such  delivery  of  all  answers,  the  “Roche  Response  Date”).  Dicerna  may  exercise  its  Co-Promotion
Option by giving written notice thereof to Roche no later than the end of the Co-Promotion Exercise Period, all in accordance
with Section 10.6.2(b).

(b) As conditions precedent to exercising a Co-Promotion Option for a Shared Product and maintaining the Co-Promotion Right

for such Co-Promotion Product, Dicerna must:

(i) establish, by means of a presentation to Roche as of the time of exercise, that it has (A) an already established internal
sales management organization and infrastructure to conduct Dicerna’s Co-Promotion activities for such Co-Promotion
Product and (B) a plan to hire, retain or otherwise build a sales force consisting of direct employees of Dicerna that will
be in place no later than [* * *] after the First Commercial Sale of such Co-Promotion Product with the number of Sales
Representatives that Dicerna is required to use, each of whom has prior experience promoting pharmaceutical products
to prescribing physicians in the Co-Promotion Territory and meets the qualifications set forth in Appendix 10.6.3; and

(ii) as of the time of exercise, and for so long as Dicerna is Co-Promoting such Co-Promotion Product hereunder and under
the Co-Promotion Agreement, not be developing or commercializing by itself or in collaboration with a Third Party, either
(A) another product that treats HBV or that (B) is an Encumbered Combination Agent.

(c) If Dicerna does not provide the election notice described in Section 10.6.2(a) prior to expiration of the applicable Co-Promotion
Exercise Period or if Dicerna does not meet the requirements set forth in Section 10.6.2(b), Dicerna shall be deemed to have
irrevocably  waived  its  right  to  Co-Promote  such  Shared  Product.  Any  election  notice  provided  by  Dicerna  at  a  time  when
Dicerna

does not meet the requirements set forth in Section 10.6.2(b) shall be void and have no effect. Following Dicerna’s exercise of
its  Co-Promotion  with  respect  to  a  particular  Co-Promotion  Product,  if  that  Co-Promotion  Product  subsequently  attains
Regulatory  Approval  in  an  Encumbered  Combination  Indication,  Dicerna  shall  not  engage  in  the  Detailing  or  other  Co-
Promotion  Activities  for  the  Co-Promotion  Product  in  the  Encumbered  Combination  Indication,  except  as  provided  for  in  the
Co-Promotion Agreement. If Dicerna does not exercise its Co-Promotion Option (or if it has been deemed to have waived its
Co-Promote Right pursuant to this Section 10.6.2(c)) for a given Shared Product for the First Eligible Co-Promotion Indication,
Dicerna shall not have the right to exercise its Co-Promotion Option with respect to any subsequent Regulatory Approvals or
label  expansion  granted  for  such  Shared  Product.  As  used  in  this  Section  10.6.2(c),  the  “First  Eligible  Co-Promotion
Indication”  for  a  Co-Promotion  Product  is  the  first  indication  for  which  Regulatory  Approval  in  the  Co-Promotion  Territory  is
obtained that is not an Encumbered Combination Indication.

10.6.3 Co-Promotion Agreement
Promptly after Dicerna’s first exercise of a Co-Promotion Option for a Co-Promotion Product, and subject to Dicerna’s compliance
with the requirements of Section 10.6.2(b)(b), the Parties shall negotiate in good faith and enter into a written agreement for Co-
Promotion (the “Co-Promotion Agreement”) setting forth the terms of Dicerna’s and Roche’s Co-Promotion rights and obligations
(including  the  specific  percentage  of  the  total  sales  force  in  the  range  permitted  under  Section  10.6.1)  with  regard  to  such  Co-
Promotion  Product  in  accordance  with  the  terms  and  conditions  in  this  Agreement  (including  this  Article  10,  including
Sections 10.6.2(b)(b), 10.6.4 and 10.6.5, and those set forth in Appendix 10.6.3). The Parties shall negotiate with such diligence
as is required to enter into and execute the Co-Promotion Agreement within [* * *] following such exercise, or such other date as
the Parties may agree in writing. The Parties shall promptly amend the Co-Promotion Agreement upon each subsequent exercise
by  Dicerna  of  a  Co-Promotion  Option  with  regard  to  a  new  Shared  Product  in  accordance  with  the  terms  and  conditions  in  this
Article 10 and Appendix 10.6.3. In addition to any other terms agreed to by the Parties, the Co-Promotion Agreement shall contain
the terms set forth in Appendix 10.6.3 of this Agreement. Unless otherwise agreed to by the Parties, Dicerna may not commence
Co-Promotion on Co-Promotion Products until such time as the Parties enter into the Co-Promotion Agreement.

10.6.4 General Requirements for Co-Promotion Activities
Dicerna’s Co-Promotion Rights shall only exist during such time as Dicerna has the Cost Share Right.

Dicerna may not use contract sales forces to fulfill its Co-Promote obligations for more than [* * *] after the First Commercial Sale
of  the  first  Co-Promotional  Product.  Any  Dicerna  Sales  Representatives  involved  in  a  sales  call  for  one  or  more  Co-Promotion
Product(s)  shall  devote  at  least  [*  *  *]  of  its  sales  call  time  until  the  [*  *  *]  anniversary  of  First  Commercial  Sale  in  the  US  and
thereafter at least [* * *] of such call time to the Co-Promotion Product(s). Under the Co-Promotion Agreement, Roche shall have
the sole right to control all decisions with respect to the co-promotion arrangement, including the call plans and assigned territories
of  Dicerna  Sales  Representatives,  the  promotional  materials  to  be  used,  the  training  and  testing  applicable  to  such  Sales
Representatives, and restrictions with respect to the ability of such Sales Representatives to Detail other products. “Co-Promote”,
“Co-Promoting” or “Co-Promotion” means the US Detailing activities assigned to Dicerna in the Co-Promotion Agreement, and
shall not include any Medical Affairs Activities, sale or distribution of such Co-Promotion Product in the Co-Promotion Territory by
Dicerna or its Affiliates. Dicerna shall have the right to terminate its Co-Promotion Rights for a Co-Promotion Product with [* * *]
prior written notice

to Roche, in which case, the Parties shall reasonably cooperate to transition to Roche, upon the effective date of such termination,
all of Dicerna’s Co-Promotion activities to such Co-Promotion Product so as to minimize disruption to sales activity, the details of
which shall be further set forth in the Co-Promotion Agreement.

10.6.5 Change of Control
Section 20.2.3 shall apply in the event of a Dicerna Change of Control.

10.7 Medical Affairs
Roche shall have the sole right and responsibility to conduct and make decisions regarding Medical Affairs Activities with respect
to  any  Product.  For  clarity,  Roche  shall  retain  such  sole  right  and  responsibility  in  the  event  that  Dicerna  exercises  its  Co-
Promotion Option. For further clarity, Dicerna’s Sales Representatives shall be supported by Roche’s Medical Affairs personnel.

11. Payments to Dicerna
11.1 Upfront License Fee for Lead Compound and Selected Targets
Within [* * *] after the Effective Date and receipt of an invoice from Dicerna, Roche shall pay to Dicerna a non-refundable, non-
creditable upfront payment of Two Hundred Million US Dollars (US$ 200,000,000). For the avoidance of doubt, upon the Effective
Date,  such  payment  is  due  and  payable  and  is  required  to  be  paid  as  provided  in  this  Section  11.1,  notwithstanding  any
termination under this Agreement or failure to select any targets and/or to commence the R&D Collaboration.

11.2 Development and Regulatory Event Payments

11.2.1 Lead Products
Roche shall pay up to a total of [* * *] in relation to the achievements of events with respect to Lead Products. The development
and  regulatory  event  payments  under  this  Section  11.2.1  shall  be  paid  by  Roche  according  to  the  following  schedule  of
development and regulatory events.

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

Development and Regulatory Event

Dollars (in millions)
[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

*The Initiation of Pivotal Study event payment will be reduced by [* * *], i.e. from [* * *], if Dicerna exercises its Cost Share Option.

Each development event payment shall be paid only once, the first time the first Lead Product reaches the applicable triggering
event, regardless the number of times such events are reached and by how many Lead Products. [* * *].

For the avoidance of doubt, development event payments due on a Lead Product under this Section 11.2.1 shall continue to be
due  at  the  rate  applicable  to  Lead  Products  (not  Hybrid  Products)  until  the  applicable  Lead  Product  has  achieved  its  First
Commercial Sale in such jurisdiction as a product not containing a Selected Target Compound.

11.2.2 Selected Target Products and Hybrid Products
For each Selected Target Product and Hybrid Product, Roche shall pay up to a total of [* * *] in relation to the achievements of
events with respect to Selected Target Products and Hybrid Products. The development and regulatory event payments under this
Section 11.2.2 shall be paid by Roche according to the following schedule of development and regulatory events.

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

Development and Regulatory Event

Dollars (in millions)
[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

* Payable upon the earlier of [* * *].

** [* * *]

Each development and regulatory event payment shall be paid only once for each Selected Target Product or Hybrid Product, the
first  time  each  Selected  Target  Product  or  Hybrid  Product  reaches  the  applicable  triggering  event,  regardless  of  the  number  of
times  such  events  are  reached  by  such  Selected  Target  Product.  For  purposes  of  this  Section  11.2.2,  with  respect  to  events  1
through  4,  [*  *  *]  Selected  Target  Products  are  considered  the  same  Selected  Target  Product  if  they  contain  different  Selected
Target Compounds that target the same Selected Target. If any of events 5 through 7 above are achieved by a Selected Target
Product,  any  of  events  1  through  4  not  previously  achieved  by  such  Selected  Target  Product  shall  be  deemed  to  have  been
achieved  at  the  time  of  achievement  of  events  5  through  7,  as  applicable,  and  the  corresponding  milestone  payment  shall  be
owed.

11.2.3 Development and Regulatory Event Payment Invoicing and Timing
Upon occurrence of each development and regulatory event in this Section 11.2, Roche shall notify Dicerna within [* * *] of the
event and pay the corresponding development and regulatory event payment to Dicerna within [* * *] of the event and receipt of an
invoice from Dicerna. Each such payment shall be non-refundable and non-creditable.

11.3 Sales Based Events

Roche shall pay to Dicerna up to a total of [* * *] based on the Calendar Year Net Sales of the Lead Product and Hybrid Product in
the Territory:

No.
[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

Sales Based Events for Net Sales

Lead Product

Hybrid Product

Dollars (in
millions)

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

Each of the sales based event payments 1-5 shall be paid no more than once each, irrespective of whether or not the previous
sales based event payment was triggered by a Lead Product or a Hybrid Product, and whether or not the previous sales based
event payment was triggered by the same or by a different applicable Product, and shall be non-refundable and non-creditable.
Roche will notify Dicerna of the achievement of sales based events within [* * *] after the end of the Calendar Quarter in which the
event first occurs for the Lead Product or Hybrid Product in the Territory first reaching the respective Net Sales Threshold, and will
pay Dicerna the corresponding milestone within [* * *] of receipt of an invoice. For the avoidance of doubt, if more than one sales
based event occurs in any Calendar Year, all such sales based event payments shall be payable for such Calendar Year.

11.4 Royalty Payments

11.4.1 Royalty Term
On a Product-by-Product basis, Roche shall pay to Dicerna royalties on Net Sales of such Product during the applicable Royalty
Term. Thereafter upon expiration of the applicable Royalty Term, the licenses granted to Roche for a given Product shall be fully
paid up, irrevocable and royalty-free.

11.4.2 Royalty Rates

11.4.2.1 Lead Product
The following royalty rates shall apply to the respective tiers of aggregate Calendar Year Net Sales of a Lead Product per area of
the Territory, on an incremental basis, as follows:

(a)
Royalty rates depend if the Lead Product is a Shared Product or is not a Shared Product.

For the [* * *]

Tier of Calendar Year
Net Sales in million US$

[* * *]
[* * *]
[* * *]
[* * *]

Percent (%) of Net Sales

Shared Product
[* * *]
[* * *]
[* * *]
[* * *]

Not a Shared Product
[* * *]
[* * *]
[* * *]
[* * *]

(b)

For aggregate countries of the Territory other than US:

Tier of Calendar Year
Net Sales in million US$
[* * *]
[* * *]
[* * *]
[* * *]

Percent (%) of Net Sales

[* * *]
[* * *]
[* * *]
[* * *]

For example, if Net Sales of a Lead Product [* * *]that is not a Shared Product, for a given Calendar Year, are [* * *], then royalties
owed to Dicerna on such Net Sales of such Product for that Calendar Year shall equal * * *]calculated as follows:

[* * *]

For the avoidance of doubt, royalty payments on a Lead Product in a given country will not be affected because a Hybrid Product
is also being sold in the same or another country.

11.4.2.2 Selected Target Product
The following royalty rates shall apply to the respective tiers of aggregate Calendar Year Net Sales of a Selected Target Product
per area of the Territory, on an incremental basis, as follows:

(a)

For [* * *]

Tier of Calendar Year
Net Sales in million US$
[* * *]
[* * *]
[* * *]
[* * *]

Percent (%) of Net Sales

[* * *]
[* * *]
[* * *]
[* * *]

(b)

For aggregate countries of the Territory other than [* * *]

Tier of Calendar Year
Net Sales in million US$
[* * *]
[* * *]
[* * *]
[* * *]

Percent (%) of Net Sales

[* * *]
[* * *]
[* * *]
[* * *]

For example, if Net Sales of a Selected Target Product [* * *], for a given Calendar Year, are [* * *], then royalties owed to Dicerna
on such Net Sales of such Product for that Calendar Year shall equal [* * *] calculated as follows:

[* * *] royalty payment

11.4.3 Hybrid Product
The following royalty rates shall apply to the respective tiers of aggregate Calendar Year Net Sales of a Hybrid Product per area of
the Territory, on an incremental basis, as follows:

(a)
Royalty rates depend if the Hybrid Product is a Shared Product or is not a Shared Product.

For [* * *]:

Tier of Calendar Year
Net Sales in million US$

[* * *]
[* * *]
[* * *]
[* * *]

Percent (%) of Net Sales

Shared Product
[* * *]
[* * *]
[* * *]
[* * *]

Not a Shared Product
[* * *]
[* * *]
[* * *]
[* * *]

(b)

For aggregate countries of the Territory other than [* * *]:

Tier of Calendar Year
Net Sales in million US$
[* * *]
[* * *]
[* * *]
[* * *]

Percent (%) of Net Sales

[* * *]
[* * *]
[* * *]
[* * *]

The above royalty rates in Section 11.4.3 shall apply to a Hybrid Product until the later of [* * *].

11.4.3.2 Royalty Adjustments

For  the  purpose  of  calculating  royalties  of  a  given  Product  under  this  Section  11.4.2,  Calendar  Year  Net  Sales  and  the  royalty
rates shall be subject, as applicable, to the following adjustments in this Section 11.4.

11.4.4 Combination Product
If  Roche  or  its  Affiliates  intend  to  sell  a  Combination  Product,  then  the  Parties  shall  meet  approximately  [*  *  *]  prior  to  the
anticipated  First  Commercial  Sale  of  such  Combination  Product  in  the  Territory  to  negotiate  in  good  faith  and  agree  to  an
appropriate  adjustment  to  Net  Sales  to  reflect  the  relative  commercial  value  contributed  by  the  components  of  the  Combination
Product (the “Relative Commercial Value”). If, after such good faith negotiations not to exceed [* * *], the Parties cannot agree to
an  appropriate  adjustment,  the  dispute  shall  be  initially  referred  to  the  executive  officers  of  the  Parties  in  accordance  with
Section 22.2.

If the Parties are unable to agree on the Relative Commercial Value within [* * *] of such referral, then the Relative Commercial
Value shall be determined by the following procedure. Roche will select one (1) individual who would qualify as an Expert, Dicerna
will select (1) individual who would qualify as an Expert, and those two (2) individuals shall select one (1) individual who would
qualify as an Expert and who shall be chairman of a committee of the three Experts (the “Expert Committee”), each with a single
deciding  vote.  The  Expert  Committee  will  promptly  hold  a  meeting  to  review  the  issue  under  review,  at  which  it  will  consider
memoranda submitted by each Party at least [* * *] before the meeting, as well as reasonable presentations that each Party may
present at the meeting. As part of the Expert Committee’s consideration, the Parties agree that the Relative Commercial Value of
the Lead Product within a Combination Product shall not be less than (a) [* * *] if the first Filing for Regulatory Approval is (or is
planned to be, as applicable) for use with one additional Non-Compound Active Agent Controlled by Roche where such compound
has a Valid Claim of the composition of matter with at least [* * *]remaining patent life in one or more countries in the Territory or
(b) [* * *] if the condition in part (a) is not met. The determination of the Expert Committee as to the issue under review will be
binding on both Parties. The Parties will share equally in the costs of the Expert Committee. Unless otherwise agreed to by the
Parties, the Expert Committee may not decide on issues outside the scope mandated under terms of this Agreement.

A Hybrid Product shall not be treated as a Combination Product under this Section 11.4.4 with respect to the Lead Compound and
Selected  Target  Compound,  however  the  Relative  Commercial  Value  will  be  determined  if  there  are  other  Combination  Product
components other than the Lead Compound and Selected Target Compound.

11.4.5 No Composition of Matter Claim or Regulatory Exclusivity; Generic Competition
For a given Product, and subject to Section 11.4.7, if in a given country within the Territory there is:

(a) no Composition of Matter Claim of a Party that Covers such Product and no applicable Regulatory Exclusivity for such Product

remains in such country; or

(b) entry of a Like-Substance Product has occurred, provided that after such entry there has been a decline of quarterly Net Sales
of such Product in such country greater than [* * *] of the average level of the quarterly Net Sales of such Product achieved in
the [* * *] immediately prior to such entry;

then the royalty payments due to Dicerna for such Product in such country shall be reduced for the remainder of the Royalty Term
by (i) [* * *] for the Major Markets other than [* * *], or (ii) [* * *].

11.4.6 Third Party Payments
Other than for the Existing Third Party In-License Agreement listed in Appendix 16.1.5 (for which Dicerna shall be responsible),
Roche  shall  be  responsible  for  and  pay  or  have  paid  any  consideration  owed  to  any  Third  Party  in  relation  to  Third  Party
intellectual property rights necessary or useful to make, use or sell Products. With respect to such Third Party Patent Rights that
are reasonably necessary for the sale of a given Product in a given country, Roche shall have the right to deduct (x) a maximum of
[* * *] of royalties actually paid by Roche to such Third Party with respect to such arrangement from (y) royalty payments otherwise
due and payable by Roche to Dicerna for such Product in such country under this Agreement. Any such deduction shall be made
only on a Product-by-Product and country-by-country basis. Prior to entering into such arrangement, Roche will notify and discuss
with Dicerna unless Roche will not deduct payments under such arrangement.

11.4.7 Maximum Deductions
In no event shall the royalty paid to Dicerna for Net Sales of Products hereunder, as reduced by Sections 11.4.5 and 11.4.6, be
reduced  from  the  applicable  royalty  rates  set  forth  in  Section  11.4.2  above  by  more  than  an  amount  equal  to  (i)  [*  *  *]  of  the
royalties otherwise due for Net Sales of such Products for the Major Markets other than [* * *], or (ii)  [* * *].

11.4.8 Apportionment of Compulsory Sublicensee Consideration
Compulsory  Sublicense  Compensation  received  by  the  Roche  Group  from  a  Compulsory  Sublicensee  during  the  Royalty  Term
shall be shared with Dicerna on an equivalent profit share percentage (the “Compulsory Profit Share Percentage”) calculated
for the respective Calendar Year for the relevant country as follows:

[* * *]

[* * *]

[* * *]

At  the  end  of  the  Calendar  Year,  Roche  shall  pay  to  Dicerna  the  Compulsory  Sublicense  Compensation  under  a  given  country
multiplied  by  the  Compulsory  Profit  Share  Percentage  for  such  country.  For  clarity,  any  sales  or  payments  by  Compulsory
Sublicensees under a Compulsory Sublicense shall not be considered as Net Sales and shall not give rise to any royalty payment
under Section 11.4.2 of this Agreement.

11.5 Disclosure of Payments
Each  Party  acknowledges  that  that  the  other  Party  may  be  obligated  to  disclose  this  financial  arrangement,  including  all  fees,
payments  and  transfers  of  value  made  pursuant  to  this  Agreement,  as  may  be  advisable  or  required  under  Applicable  Law,
including certain payments by a Party to health care providers the US Sunshine Act.

12. Accounting and reporting
12.1 Timing of Payments
Roche shall calculate royalties on Net Sales quarterly as of March 31, June 30, September 30 and December 31 (each being the
last day of an "Accounting Period”) and shall pay royalties on Net Sales within [* * *] after the end of each Accounting Period in
which such Net Sales occur.

12.2 Late Payment

Any payment under this Agreement by either Roche or Dicerna that is not paid on or before the date such payment is due shall
bear  interest,  to  the  extent  permitted  by  Applicable  Law,  at  [*  *  *]  as  reported  by  Reuters  from  time  to  time,  calculated  on  the
number of days such payment is overdue.

12.3 Method of Payment
Royalties on Net Sales and all other amounts payable by Roche hereunder shall be paid by Roche in US Dollars (the “Payment
Currency”) to account(s) designated by Dicerna.

12.4 Currency Conversion
When  calculating  the  Sales  of  any  Product  that  occur  in  currencies  other  than  the  Payment  Currency,  Roche  shall  convert  the
amount of such sales into Swiss Francs and then into the Payment Currency using Roche’s then-current internal foreign currency
translation  method  actually  used  on  a  consistent  basis  in  preparing  its  audited  financial  statements  (at  the  Effective  Date,  YTD
average rate as reported by Reuters).

12.5 Blocked Currency
In  a  given  country,  if  by  reason  of  Applicable  Law  (for  example  governmental  restrictions  on  foreign  exchange  trade)  the  local
currency is blocked and cannot be removed from such country, Roche will notify Dicerna in writing and

(a) Dicerna will have the right to receive the applicable royalties of Net Sales in such country in local currency by deposit in a local

bank designated by Dicerna, or

(b) if  such  local  currency  payment  is  not  allowed  by  reason  of  Applicable  Law  or  if  otherwise  requested  by  Dicerna,  then  the
royalties related to such Net Sales in such country shall continue to be accrued and shall continue to be reported, but such
royalties will not be paid until the sales proceeds related to such Net Sales may be removed from such country. At such time
as Roche, its Affiliates or their Sublicensees, as the case may be, is able to remove the sales proceeds related to such Net
Sales  from  such  country,  Roche  shall  also  pay  such  accrued  royalties  in  Payment  Currency  using  the  actual  exchange  rate
which is used to remove such sales proceeds from such country.

12.6 Reporting
With  each  royalty  payment,  Roche  shall  provide  Dicerna  in  writing  for  the  relevant  Calendar  Quarter  on  a  Product-by-Product
basis the following information:

(a) Sales in Swiss Francs;
(b) Net Sales in Swiss Francs and itemized adjustments to arrive at Net Sales;
(c) adjustments made pursuant to Section 11.4.4 (Combination Product);
(d) Net Sales in Swiss Francs after adjustments made pursuant to Section 11.4.4 in Swiss Francs;
(e) exchange  rate  used  for  the  conversion  of  Net  Sales  from  Swiss  Francs  to  the  Payment  Currency  pursuant  to  Section  12.4

(Currency Conversion);

(f) Net Sales after adjustments made pursuant to Section 11.4.4 in the Payment Currency;
(g) royalty rate pursuant to Section 11.4.2;
(h) adjustments made pursuant to Sections 11.4.5 - 11.4.7; and
(i)
Roche shall provide an estimate of the Net Sales in the Payment Currency to Dicerna in writing for the relevant Calendar Quarter
on a Product-by-Product basis within [* * *] after the end of each Calendar Quarter.

total royalty payable in the Payment Currency after adjustments made pursuant to Sections 11.4.5 - 11.4.7.

13. Taxes
13.1 Income Taxes
Except  as  provided  in  this  Section  13.1,  each  Party  shall  pay  all  income  and  other  taxes  (including  interest)  imposed  on  or
measured with respect to its own income accruing or paid to it under this Agreement. Notwithstanding anything in this Agreement
to the contrary, if Roche’s assignment of this Agreement leads to the imposition of income tax liability on Dicerna that would not
have  been  imposed  in  the  absence  of  such  action  or  in  an  increase  in  such  liability  above  the  liability  that  would  have  been
imposed in the absence of such action, Roche will indemnify and hold harmless Dicerna from any such additional or increased
income  tax  liability  (except  to  the  extent  that  Dicerna  or  any  of  its  Affiliates  can  obtain  a  refund  or  credit  for  such  amounts,
provided that Dicerna will be reimbursed for any reasonable out of pocket costs incurred in obtaining such a refund or credit).

13.2 Withholding Taxes
If provision is made in law or regulation of any country for withholding of taxes of any type, levies or other charges with respect to
any royalty or other amounts payable under this Agreement to a Party (the “Payee”), then the other Party (the “Payor”) shall timely
pay such tax, levy or charge for and on behalf of the Payee to the proper governmental authority, and shall promptly furnish Payee
with  appropriate  proof  of  payment  of  the  withheld  taxes  as  well  as  the  official  receipts  sufficient  to  enable  the  Payee  to  claim
credits for such payments of taxes; provided, however, that notwithstanding anything in this Agreement to the contrary, if Roche’s
assignment of this Agreement leads to the imposition of withholding tax liability on Dicerna that would not have been imposed in
the absence of such action or in an increase in such liability above the liability that would have been imposed in the absence of
such action, Roche will indemnify and hold harmless Dicerna from any such additional or increased withholding tax liability (except
to the extent that Dicerna or any of its Affiliates can reclaim it, provided that Dicerna will be reimbursed for any reasonable out of
pocket  costs  incurred  in  the  reclaim).  The  Parties  shall  cooperate  and  exercise  their  reasonable  best  efforts  to  ensure  that  any
such  withholding  taxes  are  mitigated  or  reduced  to  the  extent  possible  under  the  provisions  of  any  Applicable  Law,  and  shall
provide  the  Payee  reasonable  assistance  (including  the  provision  of  any  tax  forms  and  other  information)  in  order  to  allow  the
Payee to obtain the benefit of any present or future treaty against double taxation or exemption from, refund or reduction in taxes
which  may  apply  to  such  payments.  To  the  extent  that  a  Party  is  required  to  deduct  and  withhold  taxes  on  any  such  payment
pursuant  to  this  Section  13.2,  such  Party  will  provide  the  Payee  with  written  notice  of  the  required  withholding  as  promptly  as
reasonably  practical  (and  in  any  event,  no  later  than  [*  *  *]  prior  to  making  such  payment.  To  the  extent  such  amounts  are  so
deducted and withheld and timely remitted to the relevant tax authorities, such amounts shall be treated for all purposes under this
Agreement as having been paid to the Party to whom such amounts would otherwise have been paid.

13.3 Foreign-Derived Deduction Eligible Income Reporting
Roche  shall  obtain  and  deliver  to  Dicerna,  on  an  annual  basis  and  within  [*  *  *]  of  Dicerna’s  request  to  provide,  information  as
reasonably  requested  by  Dicerna  and  in  Roche’s  possession  to  meet  any  documentation  requirements  imposed  by  regulations
issued under Section 250 of the Internal Revenue Code for the treatment of an appropriate portion of such amounts as “foreign-
derived  deduction  eligible  income”  within  the  meaning  of  Section  250  of  the  Internal  Revenue  Code  and  the  regulations
thereunder.

13.4 No Partnership for Tax Purposes
As of the Signature Date, the Parties expect that this Agreement will not be treated as a partnership or joint venture for United
States federal and state tax purposes.

13.5 Value Added Tax
It is understood and agreed between the Parties that any payments made by any Party under this Agreement are exclusive of any
value added tax (“VAT”) or similar tax imposed upon such payments. Where VAT is properly chargeable in respect of any supply of
goods  or  services  made  under  this  Agreement,  the  Party  paying  the  consideration  for  that  supply  will  pay  the  amount  of  VAT
subject to receipt of a valid tax invoice issued in accordance with Applicable Law.

14. Auditing
14.1 Dicerna Right to Audit
Roche shall keep, and shall require its Affiliates and Sublicensees to keep, full, true and accurate books of account containing all
particulars  that  may  be  necessary  for  the  purpose  of  calculating  all  royalties  payable  under  this  Agreement.  Such  books  of
accounts shall be kept at their principal place of business. At the expense of Dicerna, Dicerna shall have the right to engage an
internationally  recognized  independent  public  accountant  reasonably  acceptable  to  Roche  to  perform,  on  behalf  of  Dicerna,  an
audit  of  such  books  and  records  of  Roche  and  its  Affiliates  and  Sublicensees  that  are  deemed  necessary  by  the  independent
public  accountant  to  report  on  Net  Sales  of  Product  for  the  period  or  periods  requested  by  Dicerna  and  the  correctness  of  any
financial report or payments made under this Agreement.

Upon timely request and at least [* * *] prior written notice from Dicerna, such audit shall be conducted for those countries Dicerna
has specifically requested, during regular business hours in such a manner as to not unnecessarily interfere with Roche's normal
business activities. Such audit shall be limited to results in the [* * *] prior to audit notification, and if Dicerna requests an audit for
a given Calendar Year, no additional audits may be conducted for such Calendar Year, unless such audit is for cause based on a
material finding identified in the initial annual audit. If Dicerna does not request an audit of a given Calendar Year on or before the
[* * *] of the end of such Calendar Year, then Dicerna will be deemed to have accepted the royalty payments and reports in such
Calendar Year.

Such audit shall not be performed more frequently than [* * *] nor more frequently than [* * *] with respect to records covering any
specific  period  of  time  unless  there  are  adverse  findings  that  the  independent  public  accountant  determines  requires  further
examination or review of records.

All information, data documents and abstracts herein referred to shall be used only for the purpose of verifying royalty statements,
shall  be  treated  as  Roche’s  Confidential  Information  subject  to  the  obligations  of  this  Agreement  and  need  neither  be  retained
more  than  [*  *  *]  after  completion  of  an  audit  hereof,  if  an  audit  has  been  requested;  nor  more  than  [*  *  *]  from  the  end  of  the
Calendar Year to which each shall pertain; nor more than [* * *] after the date of termination of this Agreement.

14.2 Audit Reports
The  auditors  shall  only  state  factual  findings  in  the  audit  reports  and  shall  not  interpret  this  Agreement.  The  auditors  shall  first
discuss their draft audit findings with Roche before sharing such findings with Dicerna and before preparing its draft or final audit
report. The final audit report shall be shared with Roche at the same time it is shared with Dicerna.

14.3 Over-or Underpayment
If the audit reveals an overpayment of royalties, Dicerna shall reimburse Roche for the amount of the overpayment within [* * *]. If
the audit reveals an underpayment of royalties, Roche shall make up such underpayment of royalties within [* * *]. Roche shall pay
for the audit costs if the underpayment

of Roche exceeds [* * *] of the aggregate amount of royalty payments owed with regard to the royalty statements subject of the
audit. Section 12.2 shall apply to this Section 14.3.

15. Intellectual Property
15.1 Ownership of Inventions
All  GalXC  Platform  Improvements  shall  be  owned  by  Dicerna.  Roche  shall  promptly  notify  Dicerna  of  any  GalXC  Platform
Improvements invented by Roche solely or jointly with Dicerna. Roche hereby assigns and agrees to assign to Dicerna all right,
title and interest in such GalXC Platform Improvements and to execute and deliver all documents, instruments and other papers
and  take  all  actions  necessary  to  perfect  such  assignment  and  for  Dicerna  to  Handle  Patent  Rights  in  such  GalXC  Platform
Improvements.

All  Roche  Background  Improvements  shall  be  owned  by  Roche.  Dicerna  shall  promptly  notify  Roche  of  Roche  Background
Improvements invented by Dicerna solely or jointly with Roche. Dicerna hereby assigns and agrees to assign to Roche all right,
title  and  interest  in  such  Roche  Background  Improvements  and  to  execute  and  deliver  all  documents,  instruments  and  other
papers  and  take  all  actions  necessary  to  perfect  such  assignment  and  for  Roche  to  Handle  Patent  Rights  in  such  Roche
Background Improvements.

Other than GalXC Platform Improvements and Roche Background Improvements, Dicerna shall own all Dicerna Inventions, Roche
shall own all Roche Inventions, and Dicerna and Roche shall jointly own all Joint Inventions. Dicerna and Roche each shall require
all of its employees to assign all Inventions made by them to Roche and Dicerna, as the case may be.
The determination of inventorship for Inventions shall be in accordance with US inventorship laws as if such Inventions were made
in the US.

Subject to the licenses granted under this Agreement, Dicerna and Roche will each have an equal undivided share in the Joint
Patent Rights, without obligation to account to the other for exploitation thereof, or to seek consent of the other Party for the grant
of any license thereunder.

Except as specifically set forth herein, this Agreement shall not be construed as: (i) giving any of the Parties any license, right,
title, interest in or ownership to (a) the Confidential Information of the other Party or (b) any materials, Know-How, Patent Rights or
other intellectual property rights Controlled by the other Party or its Affiliates; (ii) granting any license or right under any intellectual
property  rights;  or  (iii)  representing  any  commitment  by  either  Party  to  enter  into  any  additional  agreement,  by  implication  or
otherwise.

With  respect  to  Know-How  (other  than  patentable  Inventions)  made  in  connection  with  any  activity  carried  out  pursuant  to  this
Agreement, Dicerna shall own such Know-How made by employees of Dicerna solely or jointly with a Third Party, Roche shall own
such Know-How made by employees of the Roche Group solely or jointly with a Third Party, and the Parties shall jointly own Joint
Know-How, subject to Section 2.6.1.

15.2 Trademarks
Roche shall own all trademarks used on or in connection with Products and shall, at its sole cost, be responsible for procurement,
maintenance,  enforcement  and  defense  of  all  trademarks  used  on  or  in  connection  with  Products,  provided  that  if  applicable
Roche shall include in US Co-Promotion Product

labeling appropriate reference to Dicerna’s company trademark(s). Roche shall not use any trademarks owned by Dicerna without
Dicerna’s prior written consent.

Roche shall have the right to obtain the International Non-proprietary Name (INN) from the World Health Organization and the US
Adopted Name (USAN) from the US adopted Names Council (USANC) as the generic name(s) for the Products.

Dicerna  shall  use  the  Co-Promotion  Product  trademarks  in  accordance  with  Section  10.4,  the  Co-Promotion  Agreement  and
sound trademark and trade name usage principles and in accordance with all Applicable Law as reasonably necessary to maintain
the  validity  and  enforceability  of  the  Co-Promotion  Product  Trademarks.  Dicerna  recognizes  that  the  Co-Promotion  Product
trademarks  owned  by  Roche  or  Roche’s  Affiliates  represent  a  valuable  asset  of  Roche,  and  that  substantial  recognition  and
goodwill are associated with such name, logo and trademarks.

15.3 Prosecution

15.3.1 GalXC Platform Patent Rights
Dicerna shall be responsible for Handling, at its own expense and discretion, Dicerna GalXC Platform Patent Rights.

15.3.2 Specific Patent Rights
Roche shall, at its own expense and discretion: (i) Handle all Specific Patent Rights, (ii) consult with Dicerna as to the Handling of
such Specific Patent Rights, and (iii) furnish to Dicerna copies of all documents relevant to any such Handling. Roche shall furnish
such  documents  and  consult  with  Dicerna  in  sufficient  time  before  any  action  by  Roche  is  due  to  allow  Dicerna  to  provide
comments thereon, which comments Roche must reasonably consider. At Roche’s expense and reasonable request, Dicerna shall
cooperate,  in  all  reasonable  ways,  with  the  Handling  of  all  such  Specific  Patent  Rights.  Should  Roche  decide  that  it  wishes  to
abandon or does not desire to Handle a given Specific Patent Right, it shall promptly advise Dicerna thereof. At the written request
of Dicerna, Dicerna may thereafter Handle the same at Dicerna’s own cost, to the extent that Dicerna desires to do so. An outside
law  firm  shall  be  used  to  Handle  such  Specific  Patent  Right;  Roche  and  Dicerna  shall  consult  and  agree  upon  the  law  firm(s).
Roche shall ensure that the Handling of such Specific Patent Rights are as protective of and uses a similar level of diligence that
Roche would devote to similar Patent Rights Covering other similarly-situated products of Roche.

15.3.3 Other Patent Rights
For any Patent Rights other than the foregoing Patent Rights in Sections 15.3.1 and 15.3.2: (i) each party shall, at its own expense
and discretion, Handle Patent Rights claiming Inventions that are owned solely by such Party or its Affiliates (alone or with a Third
Party) at its own expense and discretion, and (ii) the Parties will jointly cooperate in the Handling of Joint Patent Rights.

15.4 Patent Coordination Team
Where  the  Parties  need  to  consult  with  each  other  on  the  Handling  of  Patent  Rights,  the  Parties  shall  establish  a  patent
coordination team and shall adopt procedures for interacting on patent matters.

15.5 CREATE Act
It is the intention of the Parties that this Agreement is a “joint research agreement” as that phrase is defined in 35 USC §103(c)(3).

15.6 Infringement
Each Party shall promptly provide written notice to the other Party during the Agreement Term of any (i) known infringement or
suspected  infringement  by  a  Third  Party  of  any  Licensed  IP  Patent  Rights  or  Joint  Patent  Rights,  or  (ii)  known  or  suspected
unauthorized use or misappropriation by a Third Party of any Licensed IP Know-How or Joint Know-How, and shall provide the
other Party with all evidence in its possession supporting such infringement or unauthorized use or misappropriation.

15.6.1 [* * *]
[* * *]

15.6.2 [* * *]
[* * *]

15.6.3 [* * *]
[* * *]

15.7 Defense
[* * *]

15.8 Hatch-Waxman
Notwithstanding anything herein to the contrary, should a Party receive a certification for a Generic Product pursuant to the Drug
Price Competition and Patent Term Restoration Act of 1984 (Public Law 98-417, known as the Hatch-Waxman Act), as amended,
or  its  equivalent  in  a  country  other  than  the  US,  then  such  Party  shall  immediately  provide  the  other  Party  with  a  copy  of  such
certification.  Upon  receipt  of  such  a  certification  Roche  shall  (i)  promptly  seek  to  obtain  a  copy  of  the  regulatory  filing  for  such
Generic Product (as contemplated in the Hatch-Waxman Act), (ii) promptly determine whether Roche will, within a [* * *] period
from  the  date  of  such  certification,  bring  suit  at  its  expense,  and  provide  written  notice  to  Dicerna  of  such  decision  (“H-W Suit
Notice”), and (iii) in any event provide Dicerna a H-W Suit Notice within [* * *] from the date on which Roche first received a copy
of such certification. Should such [* * *] period expire without Roche bringing suit or providing such H-W Suit Notice, then Dicerna
shall be free to immediately bring suit in its name.

15.9 Patent Term Extensions
The Parties shall use Commercially Reasonable Efforts to obtain all available patent term extensions, adjustments or restorations,
or supplementary protection certificates (“SPCs”, and together with patent term extensions, adjustments and restorations, “Patent
Term Extensions”) in the Territory. Dicerna shall execute such authorizations and other documents and take such other actions
as may be reasonably requested by Roche to obtain such Patent Term Extensions for relevant Specific Patent Rights, including
designating Roche as its agent for such purpose as provided in 35 USC § 156. All filings for such Patent Term Extensions shall be
made by Roche; provided, that in the event that Roche elects not to file for a Patent Term Extension, Roche shall (a) promptly
inform Dicerna of its intention not to file and (b) grant Dicerna the right to file for such Patent Term Extension. Each Party shall
execute such authorizations and other documents and take such other actions as may be reasonably requested by the other Party
to  obtain  such  extensions.  The  Parties  shall  cooperate  with  each  other  in  gaining  patent  term  restorations,  extensions  and/or
SPCs wherever applicable to such Dicerna

Patent Rights; provided, however, that notwithstanding anything to the contrary herein, Dicerna shall have the sole right to decide
on Patent Term Extensions of the GalXC Platform Patent Rights.

15.10Costs of Patent Challenge

[* * *]

16. Representations, Warranties and Covenants
Each Party makes the following representations and warranties to the other Party as of the Signature Date or the Effective Date,
as applicable, and covenants after the Effective Date.

16.1 Dicerna Representations, Warranties and Covenants

16.1.1 Data and Safety Information Disclosure
To the knowledge of Dicerna, it has disclosed to Roche: (i) the relevant and material results of all preclinical testing and human
clinical testing of Products in its possession or control; and, (ii) the relevant and material information in its possession or control
concerning side effects, injury, toxicity or sensitivity reaction and incidents or severity thereof with respect to Product. Dicerna and
its  Affiliates  are,  and  at  all  times  have  been  to  its  knowledge,  in  compliance  with  all  adverse  event  reporting  requirements
applicable to the Lead Product. To Dicerna’s knowledge, Dicerna has disclosed to Roche as of the Signature Date an accurate in
all  material  aspects  list  of  (i)  adverse  drug  experience  information  (adverse  events  and  lab  abnormalities/cohort  in  the  Dicerna
Phase I Study, the severity of each, grading and outcomes), (ii) material events and matters concerning or affecting safety or lack
of  efficacy,  and  (iii)  medical  inquiries  and  complaints,  in  each  case,  relating  to  the  Lead  Product.  Neither  Dicerna  nor  any  of  its
Affiliates is aware of anything that could materially adversely affect the acceptance, or the subsequent approval, of any Product by
any Regulatory Authority of any filing, application or request for Regulatory Authority.

16.1.2 Regulatory Documentation and No Misrepresentations to Regulatory Authorities
Dicerna and its Affiliates have, to their knowledge, with respect to Lead Product, generated, prepared, maintained and retained all
material  regulatory  documentation  that  is  required  to  be  maintained  or  retained  pursuant  to  and  in  accordance  with  cGLPs  and
cGCPs and in compliance with Applicable Law, and to the best of their knowledge and ability all such information is true, complete,
accurate  in  all  material  respects  and  what  it  purports  to  be.  Neither  Dicerna  nor  any  of  its  Affiliates,  nor  any  of  its  or  their
respective  officers,  employees  or  agents,  to  the  best  of  their  knowledge,  has  made  an  untrue  statement  of  material  fact  or
fraudulent statement to any Regulatory Authority with respect to the development or manufacture of the Lead Product, failed to
disclose a material fact required to be disclosed to any Regulatory Authority with respect to the development or manufacture of the
Lead  Product,  or  committed  an  act,  made  a  statement,  or  failed  to  make  a  statement  with  respect  to  the  development  or
manufacture of the Lead Product that could reasonably be expected to provide a basis for the FDA to invoke its policy concerning
“Fraud, Untrue Statements of Material Facts, Bribery, and Illegal Gratuities”, set forth in 56 Fed. Reg. 46191 (September 10, 1991)
and any amendments thereto or any analogous laws or policies in the Territory.

16.1.3 Third Party Patent Rights

As of the Signature Date, Dicerna has no knowledge of the existence of any patent or patent application owned by or licensed to
any Third Party that could prevent Roche from making, having made, using, offering for sale, selling or importing Product in the
Territory.

16.1.4 Ownership of Patent Rights
Dicerna is the exclusive owner of all right, title and interest in the Dicerna Base Patent Rights. Appendix 1.43 of this Agreement
contains a complete and accurate list of all Patent Rights in the Dicerna GalXC Platform Patent Rights as of the Signature Date.
No  other  parties  have  any  right,  title  or  interest  in  or  to  the  Dicerna  Base  Patent  Rights.  Except  for  rights  granted  herein,  the
Dicerna Base Patent Rights are free and clear of all liens, claims, security interests and other encumbrances of any kind or nature
for  Viral  Targets.  Dicerna  has  not  granted  any  licenses  to  the  Dicerna  Base  Patent  Rights  to  any  Third  Party,  nor  has  Dicerna
effectuated any prior transfer, sale or assignment of any part of the Dicerna Base Patent Rights, except to Affiliates.

16.1.5 Existing Third Party In-License Agreements
Except as set forth in Appendix 16.1.5 and permitted hereunder, there are no agreements between Dicerna and any of its Affiliates
with any Third Parties (i) pursuant to which Dicerna or its Affiliates has obtained, or has a right to obtain, a license under or rights
to  use  Dicerna  Patent  Rights  in  HBV  or  (ii)  pursuant  to  which  Dicerna  or  its  Affiliates  otherwise  owes,  or  would  otherwise  owe,
payments to a Third Party as a result of the exploitation of the Lead Compound and Lead Product based upon the Dicerna Patent
Rights (whether by Dicerna or Roche or their respective sublicensees), including the grant of rights to Roche.

16.1.6 Inventors
The inventors of the inventions disclosed and/or claimed in the Licensed IP have transferred (or will have transferred for Licensed
IP Patent Rights filed after the Signature Date) to Dicerna full ownership of the Licensed IP. All of Dicerna’s employees, officers
and consultants have executed agreements requiring assignment to Dicerna of all Inventions made by such individuals during the
course of and as a result of their association with Dicerna.

16.1.7 Authorization
The  execution,  delivery  and  performance  of  this  Agreement  by  Dicerna  and  all  instruments  and  documents  to  be  delivered  by
Dicerna  hereunder,  and  assuming  that  no  filing  is  required  under  the  HSR  Act:  (i)  are  within  the  corporate  power  of  Dicerna;
(ii) have been duly authorized by all necessary or proper corporate action; (iii) to the knowledge of Dicerna, will not violate any law
or regulation or any order or decree of any court of governmental instrumentality; (iv) will not violate the terms of any indenture,
mortgage,  deed  of  trust,  lease,  agreement,  or  other  instrument  to  which  Dicerna  is  a  party  or  by  which  Dicerna  or  any  of  its
property is bound, which violation would have an adverse effect on the financial condition of Dicerna or on the ability of Dicerna to
perform  its  obligations  hereunder;  and  (v)  do  not  require  any  filing  or  registration  with,  or  the  consent  or  approval  of,  any
governmental body, agency, authority or any other person, which has not been made or obtained previously (other than approvals
required  under  the  HSR  Act,  Regulatory  Approvals  required  for  the  sale  of  Products  and  filings  with  Regulatory  Authorities
required in connection with Products).

16.1.8 No Conflict
Neither Dicerna nor any of its Affiliates is or will be under any obligation to any person, contractual or otherwise, that is conflicting
with the terms of this Agreement or that would impede the fulfillment of Dicerna’s obligations hereunder.

16.1.9 Target Exclusion
Dicerna has and will continue to ensure that its Third-Party agreements appropriately exclude licenses to compounds Directed To
Viral Targets, until such compounds become available to Third Parties by early termination of such rights under this Agreement.
Dicerna will ensure that its Third Party agreements entered into on or after a given Host Cell Factor Target becomes a Selected
Target  or  Reserved  Target  appropriately  exclude  licenses  to  compounds  Directed  To  such  Host  Cell  Factor  Target  until  either
(i)  after  the  R&D  Collaboration  Term,  the  target  of  such  compounds  are  not  Selected  Targets  or  (ii)  such  compounds  become
available to Third Parties by early termination of such rights under this Agreement.

16.1.10Validity of Patent Rights
As of the Signature Date, Dicerna is not in possession of information that could render invalid and/or unenforceable any claims
that are in any of the Licensed IP. As of the Signature Date, Dicerna has no knowledge of any inventorship disputes concerning
any Licensed IP.

16.1.11Ownership and Validity of Know-How
Dicerna’s Know-How is legitimately in the possession of Dicerna and has not been misappropriated from any Third Party. Dicerna
has taken reasonable measures to protect the confidentiality of its Know-How.

16.1.12Effective Date
During  the  period  from  the  Signature  Date  until  the  Effective  Date,  Dicerna  shall  promptly  inform  Roche  in  writing  if  and  when
Dicerna or any of its Affiliates becomes aware that the representations and warranties made by Dicerna as of the Signature Date
are no longer true and correct in any material respects if made on and as of the date of such notice, except where such failure to
be true and correct would not have any material adverse effect on Roche. Upon receipt of such notice, Roche shall have the right,
on written notice to Dicerna, to terminate the Agreement, and upon receipt of such notice by Dicerna, this Agreement shall be null
and void and have no further force and effect.

16.2 Roche Representations, Warranties and Covenants

16.2.1 Authorization
The  execution,  delivery  and  performance  of  this  Agreement  by  Roche  and  all  instruments  and  documents  to  be  delivered  by
Roche hereunder, and assuming that no filing is required under the HSR Act: (i) are within the corporate power of Roche; (ii) have
been duly authorized by all necessary or proper corporate action; (iii) are not in contravention of any provision of the certificate of
formation or limited liability company agreement of Roche; (iv) to the knowledge of Roche, will not violate any law or regulation or
any order or decree of any court of governmental instrumentality; (v) will not violate the terms of any indenture, mortgage, deed of
trust, lease, agreement, or other instrument to which Roche is a party or by which Roche or any of its property is bound, which
violation  would  have  an  adverse  effect  on  the  financial  condition  of  Roche  or  on  the  ability  of  Roche  to  perform  its  obligations
hereunder; and (vi) do not require any filing or registration with, or the consent or approval of, any governmental body, agency,
authority or any other person, which has not been made or obtained previously (other than approvals required under the HSR Act,
Regulatory  Approvals  required  for  the  sale  of  Products  and  filings  with  Regulatory  Authorities  required  in  connection  with
Products).

16.2.2 Inventors

All Roche employees and officers have executed agreements requiring assignment to Roche or Roche Affiliates of all Inventions
made by such individuals. All consultants performing services by or on behalf of Roche under this Agreement shall have entered
into agreements with Roche in accordance with Section 2.4.3.

16.2.3 No Conflict
Neither Roche nor any of its Affiliates is or will be under any obligation to any person, contractual or otherwise, that is conflicting
with the terms of this Agreement or that would impede the fulfillment of Roche’s obligations hereunder.

16.2.4 Regulatory Documentation and No Misrepresentations to Regulatory Authorities
Roche and its Affiliates shall, to their knowledge, with respect to Lead Product, generate, prepare, maintain and retain all material
regulatory documentation that is required to be maintained or retained pursuant to and in accordance with cGLPs and cGCPs and
in  compliance  with  Applicable  Law,  and  to  the  best  of  their  knowledge  and  ability  all  such  information  shall  be  true,  complete,
accurate in all material respects and what it purports to be. Neither Roche nor any of its Affiliates, nor any of its or their respective
officers,  employees  or  agents,  to  the  best  of  their  knowledge,  shall  make  an  untrue  statement  of  material  fact  or  fraudulent
statement  to  any  Regulatory  Authority  with  respect  to  the  development  or  manufacture  of  the  Lead  Product,  fail  to  disclose  a
material  fact  required  to  be  disclosed  to  any  Regulatory  Authority  with  respect  to  the  development  or  manufacture  of  the  Lead
Product, or commit an act, make a statement, or fail to make a statement with respect to the development or manufacture of the
Lead  Product  that  could  reasonably  be  expected  to  provide  a  basis  for  the  FDA  to  invoke  its  policy  concerning  “Fraud,  Untrue
Statements  of  Material  Facts,  Bribery,  and  Illegal  Gratuities”,  set  forth  in  56  Fed.  Reg.  46191  (September  10,  1991)  and  any
amendments thereto or any analogous laws or policies in the Territory.

16.2.5 Ownership and Validity of Know-How
The  Know-How  that  Roche  contributes  to  the  R&D  Collaboration  is  legitimately  in  the  possession  of  Roche  and  has  not  been
misappropriated from any Third Party. Roche has taken reasonable measures to protect the confidentiality of such Know-How.

16.2.6 Effective Date
During  the  period  from  the  Signature  Date  until  the  Effective  Date,  Roche  shall  promptly  inform  Dicerna  in  writing  if  and  when
Roche or any of its Affiliates becomes aware that the representations and warranties made by Roche as of the Signature Date are
no longer true and correct in any material respects if made on and as of the date of such notice, except where such failure to be
true and correct would not have any material adverse effect on Dicerna.

16.3 Mutual Representations and Warranties
Each Party hereby represents and warrants to the other Party as follows:

16.3.1 Grants
To the best of such Party’s knowledge and belief, such Party has the lawful right to grant the other Party and its Affiliates the rights
and licenses described in this Agreement.

16.3.2 No Claims
As of the Signature Date, there are no claims or investigations to such Party’s knowledge, (other than with respect to the Parties’
HSR filings), pending or threatened against such Party or any of its Affiliates,

at law or in equity, or before or by any governmental authority relating to the matters contemplated under this Agreement or that
would materially adversely affect such Party’s ability to perform its obligations hereunder.

16.4 No Other Representations and Warranties
EXCEPT  AS  OTHERWISE  PROVIDED  IN  THIS  AGREEMENT,  THE  FOREGOING  REPRESENTATIONS  AND  WARRANTIES
ARE IN LIEU OF ALL OTHER REPRESENTATIONS AND WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF PRODUCTS.

17. Indemnification
17.1 Indemnification by Roche
Roche shall indemnify, hold harmless and defend Dicerna, Dicerna’s Affiliates and their directors, officers, employees and agents
(“Dicerna  Indemnitees”)  from  and  against  any  and  all  liabilities,  losses,  expenses,  cost  of  defense  (including  reasonable
attorneys' fees, witness fees, damages, judgments, fines and amounts paid in settlement) and any amounts Dicerna Indemnitees
become legally obligated to pay because of the breach of the Agreement by Roche or any claim or claims against it to the extent
that such claim or claims arise out of activities related to the Compounds or Products (e.g., product liability claims or Roche’s R&D
Collaboration activities or its Development or Commercialization of Compounds or Products) conducted by or on behalf of Roche,
except to the extent such losses, expenses, costs and amounts are due to the breach of the Agreement by Dicerna or the gross
negligence or willful misconduct or failure to act of Dicerna Indemnitees.

17.2 Indemnification by Dicerna
Dicerna shall indemnify, hold harmless and defend Roche, Roche’s Affiliates and their directors, officers, employees and agents
(“Roche Indemnitees”) from and against any and all liabilities, losses, expenses, cost of defense (including reasonable attorneys'
fees,  witness  fees,  damages,  judgments,  fines  and  amounts  paid  in  settlement)  and  any  amounts  Roche  Indemnitees  become
legally  obligated  to  pay  because  the  breach  of  the  Agreement  by  Dicerna  or  of  any  claim  or  claims  against  it  to  the  extent  that
such claim or claims arise out of activities related to the Compounds or Products (e.g., product liability claims or Dicerna’s R&D
Collaboration activities or its Co-Promotion of Lead Products) conducted by or on behalf of Dicerna or its Affiliates, except to the
extent such losses, expenses, costs and amounts are due to the breach of the Agreement by Roche or the gross negligence or
willful misconduct or failure to act of Roche Indemnitees.

17.3 Procedure
In the event of a claim by a Third Party against a Party entitled to indemnification under this Agreement ("Indemnified Party"), the
Indemnified Party shall promptly notify the other Party ("Indemnifying Party") in writing of the claim and the Indemnifying Party
shall undertake and solely manage and control, at its sole expense, the defense of the claim and its settlement. The Indemnified
Party  shall  cooperate  with  the  Indemnifying  Party  and  may,  at  its  option  and  expense,  be  represented  in  any  such  action  or
proceeding by counsel of its choice. The Indemnifying Party shall not be liable for any litigation costs or expenses incurred by the
Indemnified Party without the Indemnifying Party’s written consent. The Indemnifying Party shall not settle any such claim unless
such settlement fully and unconditionally releases the Indemnified Party from all liability relating thereto, unless the Indemnified
Party otherwise agrees in writing.

18. Liability
18.1 Limitation of Liability
Subject  to  the  Parties’  obligations  hereunder  to  use  Commercially  Reasonable  Efforts  including  in  Article  4  (Diligence),  neither
Party  shall  be  liable  to  the  other  Party  as  a  result  of  failure  or  delay  to  develop  and/or  commercialize  the  Compound  or  the
Product, as applicable, including a) a delay in timelines, or b) delay or failure to recruit patients, or c) a change in its respective
study protocols, or d) failure to obtain regulatory approval for the Compound or the Product, as applicable.

EXCEPT  FOR  EITHER  PARTY’S  INDEMNIFICATION  OBLIGATIONS  UNDER  ARTICLE  17  OR  BREACH  OF  ARTICLE  19,
NEITHER  PARTY  SHALL  BE  ENTITLED  TO  RECOVER  FROM  THE  OTHER  PARTY  ANY  SPECIAL,  INCIDENTAL,
CONSEQUENTIAL  OR  PUNITIVE  DAMAGES  IN  CONNECTION  WITH  THIS  AGREEMENT  OR  ANY  LICENSE  GRANTED
HEREUNDER.

19. Obligation Not to Disclose Confidential Information
19.1 Non-Use and Non-Disclosure
During  the  Agreement  Term  and  for  [*  *  *]  thereafter,  a  Receiving  Party  shall  (i)  treat  Confidential  Information  provided  by
Disclosing Party as it would treat its own information of a similar nature, (ii) take all reasonable precautions not to disclose such
Confidential  Information  to  Third  Parties,  without  the  Disclosing  Party’s  prior  written  consent,  and  (iii)  not  use  such  Confidential
Information other than for fulfilling its obligations and exercising its rights under this Agreement.

19.2 Permitted Disclosure
Notwithstanding the obligation of non-use and non-disclosure set forth in Section 19.1, the Parties recognize the need for certain
exceptions to this obligation, specifically set forth below, with respect to press releases, patent rights, publications, securities law
requirements, and certain commercial considerations.

19.3 Press Releases
The Parties may issue a press release announcing the existence and selected key terms of this Agreement, in a form substantially
similar to the template attached as Appendix 18.3 of this Agreement.

Roche may issue press releases in accordance with its internal policy that typically does not issue a second press release until
proof of concept has been achieved for a Compound. Roche shall provide Dicerna with a copy of any draft press release related to
the  activities  contemplated  by  this  Agreement  at  least  [*  *  *]  prior  to  its  intended  publication  for  Dicerna's  review.  Dicerna  may
provide Roche with suggested modifications to the draft press release. Roche shall in good faith consider Dicerna's suggestions
prior to issuing its press release.

Dicerna shall only issue press releases related to the activities contemplated by this Agreement that either (i) have been approved
by Roche or (ii) are required to be issued by Dicerna as a matter of law and Dicerna has been advised by counsel to that effect. In
all circumstances, Dicerna shall endeavor to provide Roche with a draft press release at least [* * *] prior to its intended publication
(or as soon as practicable with good faith) for Roche's review. During such period, Roche shall (i) approve the draft press release
and permit Dicerna to issue the press release, (ii) contact Dicerna to discuss modification to the draft press release, or (iii) contact
Dicerna  and  disapprove  the  press  release.  If  Roche  asks  for  modification,  then  Dicerna  shall  either  make  such  modification  or
work with Roche to arrive at a press release that Roche approves. If Dicerna issues a press release without Roche's

approval, then such release must be made by Dicerna in consultation with counsel that the release was required to be issued by
Dicerna as a matter of law.

To ensure communication alignment, responses (if any) to inquiries by media or other Third Parties after issuance of a permitted
press  release  by  Dicerna  (solely  or  jointly  with  Roche)  shall  consist  solely  of  the  press  release  language  or  shall  follow  the
response guidelines that may be mutually developed by the Parties (or as deemed necessary by Dicerna’s counsel).

19.4 Publications
During  the  Agreement  Term,  the  following  restrictions  shall  apply  with  respect  to  disclosure  by  any  Party  of  Confidential
Information  relating  to  the  Product  in  any  scientific  publication  or  presentation  (provided  that,  for  avoidance  of  doubt,  such
restrictions shall not apply to information contained in patent applications):

(a) Both Parties acknowledge that it is their policy for studies and results thereof to be registered and published in accordance
with their internal guidelines. Roche, in accordance with its internal policies and procedures, shall have the right to publish all
studies, clinical trials and results thereof on the clinical trial registries that are maintained by or on behalf of Roche. Other than
with respect to the Dicerna Phase I Study, Dicerna shall not publish any studies, clinical trials or results thereof on its clinical
trial  registry,  provided  however,  that  Roche’s  clinical  trial  registry  can  be  accessed  via  a  link  from  Dicerna’s  clinical  trial
registry.

(b) Dicerna may not publish such information about Licensed Products without the prior written consent of Roche.

19.5 Commercial Considerations

(a) Nothing in this Agreement shall prevent Dicerna or its Affiliates from disclosing Confidential Information of Roche to (i) Third
Parties acting on behalf of Dicerna, to the extent reasonably necessary and as permitted for the development, manufacture or
Co-Promotion of Lead Product in the Territory, (ii) Third Parties requesting Dicerna Phase I Study clinical trial data information
(in accordance with Dicerna’s then-current data sharing policy), or (iii) actual and potential partners and investors subject to
commercially reasonable confidentiality obligations.

(b) Nothing  in  this  Agreement  shall  prevent  Roche  or  its  Affiliates  from  disclosing  Confidential  Information  of  Dicerna  to
(i)  governmental  agencies  to  the  extent  required  or  desirable  to  secure  government  approval  for  the  development,
manufacture or sale of Product in the Territory, (ii) Third Parties acting on behalf of Roche, to the extent reasonably necessary
for the development, manufacture or sale of Product in the Territory, (iii) Third Parties requesting clinical trial data information
(in  accordance  with  the  applicable  Party’s  then-current  data  sharing  policy),  (iv)  Third  Parties  to  the  extent  reasonably
necessary to market the Product in the Territory, or (iv) actual and potential partners and investors subject to commercially
reasonable confidentiality obligations.

(c) The  Receiving  Party  may  disclose  Confidential  Information  of  the  Disclosing  Party  to  the  extent  that  such  Confidential
Information is required to be disclosed by the Receiving Party to comply with Applicable Law, to defend or prosecute litigation
or to comply with governmental regulations, provided that the Receiving Party provides prior written notice of such disclosure
to  the  Disclosing  Party  and,  to  the  extent  practicable,  takes  reasonable  and  lawful  actions  to  minimize  the  degree  of  such
disclosure.

(d) The Parties acknowledge that either or both Parties may be obligated to make one or more filings (including to file a copy of

this Agreement) with the U.S. Securities and Exchange Commission

(or equivalent foreign agency) or a governmental authority. Each Party will be entitled to make such a required filing, provided
that if such filing includes a copy of this Agreement it will (i) submit in connection with such filing a copy of this Agreement in a
form mutually agreed by the Parties in advance or, if despite the reasonable efforts of Dicerna a form mutually agreed by the
Parties cannot be agreed in advance, redacted to the extent permitted by Applicable Law (the “Redacted Agreement”), (ii)
request,  and  use  reasonable  efforts  consistent  with  Applicable  Laws  to  obtain,  confidential  treatment  of  all  terms  redacted
from this Agreement, as reflected in the Redacted Agreement, for a period of at least [* * *], (iii) to the extent consistent with
Applicable Law, promptly deliver to the other Party any written correspondence received by it or its representatives from the
U.S. Securities and Exchange Commission (or equivalent foreign agency) or a governmental authority with respect to such
confidential  treatment  request  and  promptly  advise  the  other  Party  of  any  other  material  communications  between  it  or  its
representatives  with  the  U.S.  Securities  and  Exchange  Commission  (or  equivalent  foreign  agency)  or  a  governmental
authority  with  respect  to  such  confidential  treatment  request,  (iv)  upon  the  written  request  of  the  other  Party,  if  legally
justifiable, request an appropriate extension of the term of the confidential treatment period, and (v) if the U.S. Securities and
Exchange Commission (or equivalent foreign agency) or a governmental authority requests any changes to the redactions set
forth  in  the  Redacted  Agreement,  use  reasonable  efforts  consistent  with  Applicable  Laws  to  maintain  the  redactions  in  the
Redacted  Agreement  as  originally  filed  and  not  agree  to  any  changes  to  the  Redacted  Agreement  without,  to  the  extent
practical, first discussing such changes with the other Party and taking the other Party’s comments into consideration when
deciding whether to agree to such changes (provided that a Party will only be required to make such efforts to support such
redactions once). For clarity, following a request from a governmental authority to change the redactions requested by a Party,
a Party will not be required pursuant to the provisions of this Section 19.5(d) to again request the redactions rejected by the
applicable governmental authority. Each Party will be responsible for its own legal and other external costs in connection with
any such filing, registration or notification.

19.6 Injunctive Relief
The  Parties  agree  that  a  breach  of  Article  19  may  cause  irrevocable  harm  for  which  monetary  damages  might  not  provide  a
sufficient remedy. In case of an actual or threatened material breach of Article 19, in addition to any other remedy available under
this  Agreement  or  under  applicable  Laws  or  equity,  the  non-breaching  Party  will  be  entitled  to  seek  and  obtain  equitable  relief
(including temporary or permanent restraining orders, specific performance or other injunctive relief) from any court of competent
jurisdiction, without the necessity of posting any bond or of any undertaking (other than with respect to enjoining a product launch),
and without any requirement to submit to any dispute resolution procedures contained herein.

20. Term and Termination
20.1 Commencement and Term
This Agreement shall commence upon the Effective Date and continue for the Agreement Term.

20.2 Termination

20.2.1 Termination for Material Breach
After the Effective Date, a Party (“Non-Breaching Party”) shall have the right to terminate this Agreement in its entirety or on a
Product-by-Product basis in the event the other Party (“Breaching

Party”) is in material breach (which shall include any breach of Section 3.9 (Exclusivity), Section 4 (Diligence) and Section 22.17
(Compliance  with  Laws))  of  its  obligations  under  this  Agreement.  The  non-Breaching  Party  shall  provide  written  notice  to  the
Breaching Party, which notice shall identify the material breach. The Breaching Party shall have a period of [* * *] after such written
notice is provided (“Peremptory Notice Period”) to cure such material breach. If the Breaching Party has a dispute as to whether
such material breach occurred or has been cured, it will so notify the Non-Breaching Party within the Peremptory Notice Period
and the Agreement shall not terminate until such dispute is resolved pursuant to Section 22.2 and 22.3. Upon a determination of
material breach and failure to cure, the Breaching Party shall have the Peremptory Notice Period to cure such material breach. If
such  material  breach  is  not  cured  within  the  Peremptory  Notice  Period,  then  absent  withdrawal  of  the  Non-Breaching  Party’s
request for termination, this Agreement shall terminate in its entirety or with respect to such Product effective as of the expiration
of the Peremptory Notice Period.

20.2.2 Insolvency
Either Party shall have the right to terminate this Agreement, if the other Party incurs an Insolvency Event; provided, however, in
the case of any involuntary bankruptcy proceeding, such right to terminate shall only become effective if the Party that incurs the
Insolvency Event consents to the involuntary bankruptcy or such proceeding is not dismissed within [* * *] after the filing thereof.

20.2.3 Effects of Change of Control
If there is a Change of Control, then the Party experiencing such Change of Control (“Acquired Party”) shall provide written notice
to  the  other  Party  (“Non-Acquired  Party”)  at  least  [*  *  *]  prior  to  completion  of  such  Change  of  Control,  subject  to  any
confidentiality  obligations  of  the  Acquired  Party  then  in  effect  (but  in  any  event  shall  notify  the  Non-Acquired  Party  within  [*  *  *]
after completion of such Change of Control).

The Change of Control Group in connection with such Change of Control shall not have the right to utilize any of the Non-Acquired
Party’s  Know-How  (excluding  information  generally  applicable  to  other  products  or  retained  in  the  unaided  memory  of  Dicerna
employees),  Patent  Rights,  Inventions,  Materials  or  Confidential  Information  (collectively,  “Sensitive  Information”)  for  the
research,  development  or  commercialization  of  any  product  for  the  treatment  of  any  indication  or  patient  population  for  which  a
Product may be developed or commercialized.

Following consummation of the Change of Control, the Non-Acquired Party and the Change of Control Group shall adopt in writing
reasonable  procedures  to  prevent  the  disclosure  of  Sensitive  Information  beyond  the  Acquired  Party’s  personnel  who  need  to
know  the  Sensitive  Information  solely  for  the  purpose  of  fulfilling  the  Acquired  Party’s  obligations  under  this  Agreement  or  for
lawful reporting obligations. [* * *].

20.2.4 Termination by Roche without a Cause
After  the  Effective  Date,  Roche  shall  have  the  right  to  terminate  a  given  Research  Plan  under  the  R&D  Collaboration  (i.e.  on  a
Selected  Target-by-Selected  Target  basis)  or  the  R&D  Collaboration  in  its  entirety  upon  [*  *  *]  prior  written  notice,  and  such
Selected Target shall become a Discontinued Target.

In addition to the foregoing, at any time after the Effective Date, Roche shall have the right to terminate this Agreement as a whole
or on a Licensed Product-by-Licensed Product basis upon [* * *] prior written notice before First Commercial Sale of a Licensed
Product or upon [* * *] prior written notice after the First Commercial Sale of a Licensed Product. The effective date of termination
under this Section 20.2.4

paragraph 2 shall be the date [* * *] as the case may be) after Roche provides such written notice to Dicerna.

20.2.5 Termination of Selected Targets
After the Effective Date, at the end of the R&D Collaboration Term (or earlier termination thereof), if across all Selected Targets
Roche  does  not  select  any  Additional  Dicerna  Compounds  as  a  Clinical  Candidate,  Roche  shall  have  the  right,  but  not  the
obligation, to terminate all rights to all Additional Dicerna Compounds generated under the R&D Collaboration upon [* * *] written
notice.  After  a  Clinical  Candidate  is  selected  for  a  given  Selected  Target  or  after  the  Target  Term  if  Roche  provides  a  Roche
Continuation Notice, Roche shall have the right to (or where required by Section 3.8, the obligation to) terminate with respect to all
Licensed  Products  for  such  Selected  Target  upon  [*  *  *]  prior  written  notice.  Upon  such  termination,  such  Selected  Target  shall
become a Discontinued Target.

20.2.6 Termination for Patent Challenge
[* * *].

20.3 Consequences of Termination

20.3.1 Roche Compound License
In  the  event  of  a  (i)  termination  of  the  Agreement  as  a  whole  by  Roche  pursuant  to  Section  20.2.1  (for  Material  Breach  by
Dicerna),  Section  20.2.2  (for  Dicerna’s  Insolvency)  or  Section  20.2.4  (Without  a  Cause)  or  (ii)  termination  pursuant  to
Section 20.2.5 (Termination of Selected Targets) or pursuant to Section 20.2.6 (for Patent Challenge) (a “Non-Exclusive Trigger”)
then

(a) Roche shall retain the Non-Exclusive Roche License for (i) all applicable Roche Compounds (for Agreement termination) or
(ii)  all  applicable  Roche  Compounds  Directed  To  the  given  Selected  Target  being  terminated  (for  Selected  Target
termination),

(b) Article  4  notwithstanding,  Roche  shall  not  continue  to  have  diligence  obligations  related  to  any  such  Roche  Compounds,

and,

(c)

the financial compensation owed to Dicerna for Roche Compounds under Sections 11.2.2 and 11.4.2.2 and shall remain, but
subject to the following reductions:

(i)

(ii)

[* * *]

[* * *]

(iii)

[* * *].

[* * *].

Notwithstanding  the  foregoing,  if  Roche  terminates  the  R&D  Collaboration  in  its  entirety  on  or  before  Initiation  of  the  first
Phase II Study for the Lead Product, the financial compensation owed to Dicerna for Roche Compounds shall be eliminated in
its entirety.

(collectively, the “Non-Exclusive Conditions”).

20.3.2 Termination by Dicerna pursuant to Section 20.2.1 (Material Breach by Roche) or Section 20.2.2 (Insolvency)

Upon any termination by Dicerna pursuant to Section 20.2.1 (Material Breach by Roche) or Section 20.2.2 (Insolvency) all rights
and licenses granted by Dicerna to Roche under this Agreement shall terminate in their entirety or on a Product-by-Product basis,
as applicable, on the effective date of termination. If the alleged material breach by Roche is of its obligations under Article 4, then
termination shall only be on a Product-by-Product basis.

If Dicerna desires to continue Development and/or Commercialization of Licensed Product(s), Dicerna shall give a Continuation
Election  Notice  to  Roche  within  [*  *  *]  of  Dicerna’s  notice  of  such  termination.  If  Roche  receives  such  a  timely  Continuation
Election Notice, then with respect to applicable Licensed Product(s) and to the extent reasonably requested by Dicerna:

(a) Roche hereby grants to Dicerna [* * *] license to Roche Grant-Back Patent Rights and (if such Licensed Product has achieved
First Commercial Sale) the applicable Product Trademarks (in each case with the right to sublicense through multiple tiers),
and a [* * *] license to Roche Know-How, solely to the extent necessary [* * *].

(b) After the effective date of termination Roche shall (or shall cause such other Roche Group member to), to the extent Roche
has the right to do so, assign and transfer to Dicerna all regulatory filings and approvals, all final pre-clinical and clinical study
reports  and  clinical  study  protocols,  and  all  data,  including  clinical  data,  in  Roche’s  possession  and  control  related  to
applicable Licensed Product(s) in the country reasonably necessary for Dicerna to continue to Develop and Commercialize
the Licensed Product(s). To the extent Roche does not have the right to make such assignment and/or transfer, Roche shall,
to the extent possible, provide a license, right of reference, or other right or access to such regulatory filings and approvals,
pre-clinical and clinical study reports and protocols, and data. All data shall be transferred in the form and format in which it is
maintained  by  Roche.  Original  paper  copies  shall  only  be  transferred,  if  legally  required.  Roche  shall  not  be  required  to
prepare or finalize any new data, reports or information solely for purposes of transfer to Dicerna.

(c) Roche  shall  assign  all  clinical  trial  agreements  for  applicable  Licensed  Product(s),  to  the  extent  such  agreements  have  not
been cancelled in good faith and are assignable without Roche breaching such agreement (any required consideration to be
paid by Roche). In any event, Roche shall cooperate and make all reasonable efforts to provide an orderly transition of clinical
activities and continue such agreements to support such transition.

(d) Dicerna  shall,  upon  transfer,  have  the  right  to  disclose  such  filings,  approvals  and  data  to  (i)  governmental  agencies  of  the
country  to  the  extent  required  or  desirable  to  secure  government  approval  for  the  development,  manufacture  or  sale  of
Licensed  Product(s)  in  the  country,  (ii)  Third  Parties  acting  on  behalf  of  Dicerna,  its  Affiliates  or  licensees,  to  the  extent
reasonably necessary for the development, manufacture, or sale of Licensed Product(s) in the country, and (iii) Third Parties
to the extent reasonably necessary to market Licensed Product(s) in the country.

(e)

In consideration for the above license and transfers, and Roche’s work on applicable Licensed Product(s), Dicerna shall pay
Roche a royalty on all net sales (as determined by reasonable accounting methods) of Licensed Product(s) by Dicerna, its
Affiliates or licensees, mutatis mutandis, with the royalty rate as follows:

Status of Product at termination effective date

Royalty rate for Lead
Product

Royalty rate for other
Licensed Products

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

Notwithstanding  the  foregoing,  Dicerna  shall  pay  a  [*  *  *]  royalty  on  net  sales  for  Licensed  Products  (other  than  with  the  Lead
Product) that are Combination Products and where Roche has at least Completed a Phase I Study if Roche elects to not provide
transfer and license access to the other therapeutically active ingredients contained in such Combination Product.

20.3.3 Termination by Roche without Cause or for Material Breach by Dicerna or Dicerna’s Insolvency, or Termination for Patent

Challenge

Subject to the Non-Exclusive Conditions, upon any termination by Roche without cause (under Section 20.2.4 or Section 20.2.5),
for Dicerna’s Insolvency, for  material  breach  by  Dicerna  or  for  Patent  Challenge  (under  Section  20.2.6),  the  rights  and  licenses
granted by Dicerna to Roche under this Agreement shall terminate in their entirety or with respect to the R&D Collaboration or all
Dicerna  Compounds,  or  on  a  Licensed  Product-by-Licensed  Product,  Selected  Target-by-Selected  Target  or  Research  Plan-by-
Research Plan basis, as applicable, on the effective date of termination.

If Dicerna desires to continue Development and/or Commercialization of Licensed Product(s), Dicerna shall give a Continuation
Election Notice to Roche within [* * *] of receipt of Roche’s notice of termination without cause. If Roche receives such a timely
Continuation  Election  Notice,  then  with  respect  to  applicable  Licensed  Product(s)  and  to  the  extent  reasonably  requested  by
Dicerna:

(a) Roche hereby grants to Dicerna an exclusive, royalty-bearing, worldwide license to Roche Grant-Back Patent Rights and (if
such Licensed Product has achieved First Commercial Sale) the applicable Product Trademarks (in each case with the right
to sublicense through multiple tiers), and a non-exclusive, royalty-free, worldwide license to Roche Know-How, solely to the
extent  reasonably  necessary  to  allow  Dicerna,  its  Affiliates  or  licensees  to  develop,  have  developed,  manufacture,  have
manufactured,  use,  offer  to  sell,  sell,  promote,  export  and  import  the  applicable  Licensed  Product(s)  in  the  applicable
country(ies). For clarity, the licenses under this Section 20.3.3(a) shall not include any licenses that Roche has with a Third
Party for which such grant would be prohibited or under which a member of the Roche Group would incur financial obligations
to such Third Party.

(b) After the effective date of termination Roche shall, to the extent Roche has the right to do so, assign and transfer to Dicerna
all  regulatory  filings  and  approvals,  all  final  pre-clinical  and  clinical  study  reports  and  clinical  study  protocols,  and  all  data,
including clinical data, in Roche’s possession and control related to applicable Licensed Product(s) in the country reasonably
necessary for Dicerna to continue to Develop and Commercialize the Licensed Product(s). To the extent Roche does not have
the right to make such assignment and/or transfer, Roche shall, to the extent possible, provide a license, right of reference, or
other right or access to such regulatory filings and approvals, pre-clinical and clinical study reports and protocols, and data.
All  data  shall  be  transferred  in  the  form  and  format  in  which  it  is  maintained  by  Roche.  Original  paper  copies  shall  only  be
transferred, if legally required. Roche shall not be required to prepare or finalize any new data, reports or information solely
for purposes of transfer to Dicerna.

(c) Roche shall assign all clinical trial agreements for the applicable Licensed Product(s), to the extent such agreements have not
been cancelled in good faith and are assignable without Roche paying any consideration or commencing litigation in order to
effect  an  assignment  of  any  such  agreement,  provided  that  Roche  has  agreed  to  such  consideration  in  good  faith  and  has
given  Dicerna  notice  of  the  requisite  amount  of  consideration  and  affording  Dicerna  the  opportunity  to  provide  such
consideration. In any event, Roche shall cooperate and make all reasonable efforts to provide an orderly transition of clinical
activities and continue such agreements to support such transition.

(d) Dicerna  shall,  upon  transfer,  have  the  right  to  disclose  such  filings,  approvals  and  data  to  (i)  governmental  agencies  of  the
country  to  the  extent  required  or  desirable  to  secure  government  approval  for  the  development,  manufacture  or  sale  of
Licensed  Product(s)  in  the  country;  (ii)  Third  Parties  acting  on  behalf  of  Dicerna,  its  Affiliates  or  licensees,  to  the  extent
reasonably necessary for the development, manufacture, or sale of Licensed Product(s) in the country, and (iii) Third Parties
to the extent reasonably necessary to market Licensed Product(s) in the country.

(e)

In consideration for the above license and transfers, and Roche’s work on applicable Licensed Product(s), Dicerna shall pay
Roche a royalty on all net sales (as determined by reasonable accounting methods) of Licensed Product(s) by Dicerna, its
Affiliates or licensees, mutatis mutandis, with the royalty rate as follows:

Status of Product at termination effective date

Royalty rate for Lead
Product

Royalty rate for other
Licensed Products

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

Notwithstanding anything to the contrary herein, if Roche terminates an individual Selected Target without replacing it with another
under the procedures set forth in Section 3.6, then all Additional Dicerna Compounds related to such Selected Target shall revert
to Dicerna free of charge.

20.3.4 Direct License
Irrespective of anything to the contrary in this Agreement,

(a) any Compulsory Sublicense shall remain in full force and effect as may be required by Applicable Law, and

(b) any  existing  sublicense  granted  by  Roche  (and  any  further  sublicenses  thereunder)  in  accordance  with  Section  2.4.2  shall,
upon the written request of Roche, remain in full force and effect, provided that (i) such Sublicensee is not then in breach of its
sublicense agreement (and, in the case of termination by Dicerna for breach by Roche, that such Sublicensee and any further
sublicensees  did  not  cause  the  breach  that  gave  rise  to  the  termination  by  Dicerna);  (ii)  Dicerna  continues  to  receive  the
amounts  for  development  and  regulatory  event  payments  and  sales  based  events  as  set  forth  in  Sections  11.2  and  11.3;
(iii) the royalty rates in such sublicense agreement are equal to the royalty rates set forth in Section 11.4 and are received by
Dicerna; and (iv) such Sublicensee agrees in writing to be bound to Dicerna under the terms and conditions of such sublicense
agreement and the applicable terms of this Agreement.

20.3.5 Other Obligations

20.3.5.1 Obligations Related to Ongoing Activities
If  Dicerna  does  not  provide  timely  Continuation  Election  Notice,  then  Roche  (a)  shall  have  the  right  to  cancel  all  ongoing  non-
financial obligations with respect to the applicable Licensed Product(s) and (b) shall complete all non-cancellable obligations at its
own expense.

If Dicerna provides such timely Continuation Election Notice, then from the date of notice of termination until the effective date of
termination, Roche shall continue activities for the applicable Licensed Product(s), including preparatory activities, ongoing as of
the date of notice of termination. Additionally, for Third Party CMO and CRO service providers in use by Roche for the applicable
Licensed Product(s) of Roche, upon request of Dicerna Roche will facilitate an introduction to, cooperate in good faith, and allow
Dicerna  to  contract  directly  with,  such  contractual  party,  if  possible.  Roche  shall  not  be  obliged  to  initiate  any  new  activities  not
ongoing at the date of notice of termination.

After the effective date of termination, Roche shall have no obligation to perform and/or complete any activities or to make any
payments  for  performing  or  completing  any  Development  activities  under  this  Agreement,  except  as  expressly  stated  in  the
Agreement.  Roche  shall  promptly  transfer  back  to  Dicerna  all  patent  prosecution  files  relating  to  Licensed  IP  and  patent
prosecution activities to Dicerna’s control.

Notwithstanding the foregoing, in case of termination by Dicerna under Section 20.2.1 or 20.2.2 or by Roche under Section 20.2.4,
upon  the  request  of  Dicerna,  Roche  shall  complete  any  Clinical  Studies  related  to  the  applicable  Licensed  Product(s)  that  are
being  conducted  under  its  CTAs  for  the  Licensed  Product(s)  and  are  ongoing  as  of  the  effective  date  of  termination;  provided,
however, that:

(i) both  Dicerna  and  Roche  in  their  reasonable  judgment  have  concluded  that  completing  any  such  Clinical  Studies  does  not

present an unreasonable risk to patient safety;

(ii) Roche shall have no obligation to recruit or enroll any additional patients after the date of termination; and

(iii) Dicerna  shall  be  responsible  for  all  Development  Costs  that  arise  after  the  effective  date  of  termination  in  completing  such

Clinical Studies.

Either  Party  shall  have  the  right  to  complete  on-going  pre-clinical  animal  studies  if  the  early  termination  thereof  would  raise
potential ethical concerns concerning animal rights issues.

20.3.5.2 Obligations Related to Manufacturing
(a) Clinical Supplies

In the case of termination by Dicerna according to Section 20.2.1 or 20.2.2 or by Roche under Section 20.2.4, if Dicerna elects
to  Develop  the  applicable  Licensed  Product(s),  Roche  shall  transfer  all  existing  and  available  clinical  material  to  Dicerna  at
Roche’s fully burdened manufacturing cost. Dicerna shall assume all liability for the use of such material.

(b) Commercial Supplies

In the case of termination by Dicerna according to Section 20.2.1 or 20.2.2 or by Roche under Section 20.2.4, if a Licensed
Product is marketed in any country of Territory on the date of the notice of termination of this Agreement, upon the request of
Dicerna,  Roche  shall  manufacture  and  supply  reasonable  amounts  of  such  Licensed  Product  to  Dicerna  under  a
manufacturing transfer and transition plan for a period that shall not exceed [* * *] from the effective date of the termination of
this Agreement at a price to be agreed by the Parties in good faith, but in no event

exceeding (i) Roche‘s fully burdened manufacturing cost, if the Licensed Product is manufactured tor Roche through a Third
Party contract, or (ii) Roche‘s fully burdened manufacturing cost plus a mark-up of [* * *]‚ if Roche manufactures the Licensed
Product  itself,  as  calculated  on  a  consistent  basis  according  to  its  then  current  accounting  procedures.  Dicerna  shall  use
Commercially Reasonable Efforts to take over such manufacturing as soon as possible after the effective date of termination.
If, despite using Commercially Reasonable Efforts, Dicerna has not secured commercial supply of the Product within the [* * *]
period, then the Parties shall use Commercially Reasonable Efforts to ensure an uninterrupted commercial supply for up to a
maximum  additional  [*  *  *]  period,  in  quantities  sufficient  to  satisfy  Dicerna‘s  requirements  and  for  Dicerna  to  assume  all
development and commercialization activities, at a price which shall be at (i) Roche‘s fully burdened manufacturing cost plus a
mark-up  of  [*  *  *]  if  Product  is  manufactured  for  Roche  through  a  Third  Party  contract,  or  (ii)  Roche‘s  fully  burdened
manufacturing cost plus a mark-up of [* * *] if Roche manufactures Product itself, under terms to be negotiated in good faith.

20.3.5.3 Ancillary Agreements
Unless  otherwise  agreed  by  the  Parties,  the  termination  of  this  Agreement  shall  cause  the  automatic  termination  of  all  ancillary
agreements related hereto, including the Pharmacovigilance Agreement and the Co-Promotion Agreement, if any.

20.3.5.4 Limitations on Grant-Backs; Transfer Expenses; Damages and Other Relief
For purposes of clarity, irrespective of anything to the contrary in this Agreement:

(a) Dicerna may not give a Continuation Election Notice to Roche for Licensed Products (other than the Lead Product) that have

not advanced into Development by or on behalf of Roche as of the effective date of termination.

(b) All transfers and licenses from Roche to Dicerna (or other obligations of Roche) under Section 20.3 are solely (i) where the
Licensed  Product  contains  both  the  Lead  Compound  and  a  Selected  Target  Compound,  only  with  respect  to  the  applicable
Dicerna  Compound(s)  that  have  been  previously  terminated  or  are  subject  to  the  termination,  (ii)  with  respect  to  Licensed
Product(s)  that  are  not  (A)  Combination  Product(s)  containing  a  compound  that  is  proprietary  to  Roche  or  subject  to  Third
Party  rights  or  (B)  Companion  Diagnostics,  and  (iii)  for  the  applicable  Licensed  Product  that  is  being  Developed  or
Commercialized  by  or  on  behalf  of  Roche  as  it  exists  on  the  effective  date  of  termination.  Such  transfers,  licenses  and
obligations  do  not  extend  to  other  therapeutically  active  ingredients  or  products,  even  if  physically  mixed,  combined  or
packaged together with a Licensed Product, and even if a Licensed Product is intended (according to the investigation plan,
proposed labeling or actual labeling, as applicable) for use with such other therapeutically active ingredients or products.

(c) In connection with research studies, clinical trials or other activities associated with the Development and Commercialization of
Licensed  Products,  Roche  may  have  collected  (i)  personally  identifiable  information  about  individual  human  subjects  and/or
(ii) human biological samples (collectively, “PII/Samples”). Legal and contractual restrictions may apply to such PII/Samples.
Roche  shall  have  no  obligation  to  transfer  such  PII/Samples  unless  reasonably  necessary  or  useful  for  the  continued
Development  of  the  Licensed  Product,  in  which  case  Roche  shall  not  be  obliged  to  transfer  any  PII/Samples  that  Roche  in
good faith believes would be prohibited or would subject Roche to potential liability by reason of Applicable Law, insufficient
patient consent or contractual restrictions (however for contractual restrictions, upon request of Dicerna Roche

will  facilitate  an  introduction  to  the  applicable  contractual  party  and  allow  Dicerna  to  contract  directly  with  such  contractual
party,  if  possible).  If  Roche  transfers  any  such  PII/Samples,  Dicerna  shall  use  for  the  sole  purpose  of  Developing  and
Commercializing  the  Licensed  Product,  and  Dicerna  shall  be  responsible  for  the  correct  use  of  the  PII/Samples  in  line  with
Applicable Law and the informed consent forms (including but not limited to potential re-consenting of the patients at Dicerna’s
costs).

(d) Dicerna shall promptly reimburse Roche for all reasonable out-of-pocket costs and expenses (including FTE charges) incurred
by  or  on  behalf  of  Roche  for  transfer  activities  from  Roche  to  Dicerna  under  Sections  20.3.2  and  20.3.3  (“Roche Transfer
Activities”); however transfer activities corresponding to the return of materials, data, reports, records, documents, Regulatory
Filings  and  Regulatory  Approvals  originally  provided  by  Dicerna  to  Roche  no  less  than  [*  *  *]  from  the  effective  date  of
termination  (“Dicerna-Originated  Transfer  Activities”)  shall  be  returned  to  Dicerna  (if  readily  available)  free  of  charge.  If
Dicerna desires Roche Transfer Activities other than Dicerna-Originated Transfer Activities, Dicerna shall make a payment to
Roche of [* * *] (“Minimum Transfer Payment”). The Minimum Transfer Payment shall be non-refundable, but shall be fully
creditable  against  Dicerna’s  reimbursement  for  the  Roche  Transfer  Activities.  Roche  shall  be  under  no  obligation  to  provide
Roche  Transfer  Activities  (beyond  than  Dicerna-Originated  Transfer  Activities)  prior  to  receipt  of  the  Minimum  Transfer
Payment or if the Minimum Transfer Payment is received after the effective date of the termination.

(e) Unless  otherwise  agreed  to  by  the  Parties,  transfer  of  physical  materials  that  are  required  under  Roche  Transfer  Activities
(except in conjunction with such future toll manufacturing obligations as may apply under Section (b), if applicable) shall be
delivered CPT Dicerna or Dicerna’s designee to the location designated by Dicerna (Incoterms 2010).

(f) Neither Party may use any documents or materials provided by the other Party as part of any license or transfer under this
Section  20.3  as  evidence  in  any  legal  proceedings  against  the  providing  Party,  however  this  exception  will  not  apply  to
documents or materials exchanged pursuant to discovery requests or other litigation processes.

(g) Termination of this Agreement and exercise of the rights and remedies set forth herein (or failure to terminate or exercise such
rights and remedies) shall not preclude either Party from claiming any other damages, compensation or relief to which it may
be entitled.

20.3.5.5 Royalty and Payment Obligations; Return of Information and Technology
Termination of this Agreement by a Party, for any reason, shall not release Roche from any obligation to pay royalties or make any
payments  to  Dicerna  that  accrued  prior  to  the  effective  date  of  termination.  Termination  of  this  Agreement  by  a  Party,  for  any
reason, will release Roche from any obligation to pay royalties or make any payments to Dicerna that would otherwise accrue on
or after the effective date of termination. To the extent practicable, upon expiration or termination of this Agreement, each Party
shall return to the other Party, or destroy, the other Party’s Confidential Information and all copies thereof, except to the extent and
for so long as such Confidential Information is included within the scope of any surviving license, and provided that each Party
may  keep  [*  *  *]  copy  of  the  other  Party’s  Confidential  Information  in  its  confidential  files  solely  for  records  purposes.  Without
limiting the foregoing, upon termination of this Agreement or a Product is returned to Dicerna, Roche shall return to Dicerna the
information and materials solely with respect to such Licensed Product which shall become Dicerna’s Confidential Information.

20.4 Survival
Article  1  (Definitions,  to  the  extent  necessary  to  interpret  this  Agreement),  Section  2.3  (Non-Exclusive  Roche  License),  Section
2.4.2 (last sentence of first paragraph), Section 2.4.3 (Right to Subcontract, for purpose of continuing obligations under Article 20),
Section 2.6 (Freedom-to-operate Licenses), Section 3.5.2 (Research Records, for purpose of continuing obligations under Article
20), Articles 11 and 12 (Payment to Dicerna, and Accounting and Reporting, each to the extent payment obligations exist at the
time of termination), Article 13 (Taxes, to the extent such were incurred at the time of termination), Article 14 (Auditing, for [* * *],
Section 15.1 (Ownership of Inventions), Sections 15.6, 15.7, and 15.8 (Infringement, Defense, and Hatch-Waxman, for purpose of
accrued  obligations),  Section  15.10  (Costs  of  Patent  Challenge),  Section  16.4  (No  Other  Representations  and  Warranties),
Article 17 (Indemnification), Article 18 (Liability), Article 19 (Obligation Not to Disclose Confidential Information), Article 20 (Term
and Termination), Article 21 (Bankruptcy), and Article 22 (Miscellaneous, but excluding Sections 22.4, 22.6, 22.17 and 22.18), and
such  sections  as  are  relevant  for  the  mutatis  mutandis  provisions  under  Sections  20.3.2(e)  and  20.3.3(e)  shall  survive  any
expiration or termination of this Agreement for any reason.

21. Bankruptcy
All licenses (and to the extent applicable rights) granted under or pursuant to this Agreement are, and shall otherwise be deemed
to be, for purposes of Section 365(n) of Title 11, US Code (the “Bankruptcy Code”) licenses of rights to “intellectual property” as
defined under Section 101(35A) of the Bankruptcy Code. Unless a Party elects to terminate this Agreement, the Parties agree that
such Party, as a licensee or sublicensee of such rights under this Agreement, shall retain and may fully exercise all of its rights
and elections under the Bankruptcy Code, subject to the continued performance of its obligations under this Agreement.

22. Miscellaneous
22.1 Governing Law; Excluded Claims
This Agreement shall be governed by and construed in accordance with the laws of the US state of Delaware, without reference to
its conflict of laws principles.

Notwithstanding  anything  to  the  contrary  in  this  Agreement,  Excluded  Claims  shall  be  determined  in  a  court  of  competent
jurisdiction over such Excluded Claim. With respect to Excluded Claims, each Party consents to the jurisdiction of the state and
federal courts located in the State of New York and waives any objection to such courts on grounds of personal jurisdiction, venue,
or forum non conveniens.

22.2 Disputes
Unless  otherwise  set  forth  in  this  Agreement,  in  the  event  of  any  dispute  between  the  Parties  arising  out  of  or  relating  to  this
Agreement  (each,  a  “Dispute”)  and  the  Parties  cannot  resolve  such  Dispute  (through  their  respective  Alliance  Directors  or  the
JRC or JSC, if and as applicable) within [* * *] of a written request by either Party to the other Party (“Notice of Dispute”), and
such Dispute is not one for which a Party has final decision-making as expressly set forth in this Agreement, such Dispute shall be
referred  to  the  respective  executive  officers  of  the  Parties  designated  below  or  their  designees,  for  good  faith  negotiations
attempting to resolve the Dispute. The designated executive officers are as follows:

For Dicerna:    CEO
For Roche:    Head of Pharma Partnering

22.3 Arbitration
Except for an Excluded Claim, should the Parties fail to resolve a Dispute within [* * *] after delivery of a Notice of Dispute, then
such Dispute shall be finally resolved by binding arbitration by [* * *] arbitrators experienced in the business of pharmaceuticals in
accordance with the commercial arbitration rules of the International Chamber of Commerce (ICC) as in force at the time when
initiating  the  arbitration  applying  the  substantive  law  specified  in  Section  22.1.  The  right  and  obligation  to  arbitrate  under  this
Section 22.3 shall extend to any claims by or against the Parties and their respective Affiliates and any agents, principals, officers,
directors or employees of either of the Parties or their respective Affiliates.

Each Party shall nominate one arbitrator. Should the claimant fail to appoint an arbitrator in the request for arbitration within [* * *]
of being requested to do so, or if the respondent should fail to appoint an arbitrator in its answer to the request for arbitration within
[* * *] of being requested to do so, the other Party shall request the ICC Court to make such appointment.

The arbitrators nominated by the Parties shall, within [* * *] from the appointment of the arbitrator nominated in the answer to the
request for arbitration, and after consultation with the Parties, agree and appoint a third arbitrator, who will act as a chairman of the
Arbitral  Tribunal.  Should  such  procedure  not  result  in  an  appointment  within  the  [*  *  *]  time  limit,  either  Party  shall  be  free  to
request the ICC Court to appoint the third arbitrator.

Where  there  is  more  than  one  claimant  and/or  more  than  one  respondent,  the  multiple  claimants  or  respondents  shall  jointly
appoint one arbitrator.

If  any  Party-appointed  arbitrator  or  the  third  arbitrator  resigns  or  ceases  to  be  able  to  act,  a  replacement  shall  be  appointed  in
accordance with the arrangements provided for in this Section.

The place of arbitration shall be [* * *]. The language to be used shall be English.

Either  Party,  without  waiving  any  remedy  under  this  Agreement,  may  seek  from  any  court  having  jurisdiction  any  temporary
injunctive  or  provisional  relief  necessary  to  protect  the  rights  or  property  of  that  Party.  Once  the  arbitrators  are  in  place,  either
Party  may  also  apply  to  the  arbitrators  for  interim  injunctive  relief  until  the  arbitration  award  is  rendered  or  the  controversy  is
otherwise resolved, and either Party may apply to a court of competent jurisdiction to enforce interim injunctive relief granted by
the arbitrators. Any final award by the arbitrators may be entered by either Party in any court having appropriate jurisdiction for a
judicial recognition of the decision and applicable orders of enforcement. The arbitrators may render early or summary disposition
of any or some issues after the Parties have had a reasonable opportunity to make submissions on such issues. The arbitrators
shall have no authority to award punitive or any other type of damages not measured by a Party’s compensatory damages. Each
Party shall bear its own costs and expenses and attorneys’ fees and an equal share of the arbitrators’ fees and any administrative
fees of arbitration, unless the arbitrators determine otherwise.

Except to the extent necessary to confirm an award or as may be required by law, neither a Party nor an arbitrator may disclose
the existence, content, or results of an arbitration without the prior written consent of both Parties. In no event shall an arbitration
be initiated after the date when commencement

of a legal or equitable proceeding based on the dispute, controversy or claim would be barred by the applicable [* * *] statute of
limitations.

22.4 HSR
As soon as is reasonably practicable following the Signature Date and in any event within [* * *] of the Signature Date, each of
Dicerna  (or  its  Affiliate,  as  appropriate)  and  Roche  (or  its  Affiliate,  as  appropriate)  shall  prepare  and  submit  appropriate  filings
under  the  United  States  Hart-Scott-Rodino  Antitrust  Improvements  Act  of  1976,  as  amended  (the  “HSR  Act”)  and  the  rules
promulgated thereunder, and request early termination of the waiting period under the HSR Act. The Parties shall furnish, or cause
their respective Affiliates to furnish, as the case may be, promptly to the United States Federal Trade Commission (the “FTC”) and
the  Antitrust  Division  of  the  United  States  Department  of  Justice  (the  “DOJ”)  any  additional  information  reasonably  requested
within  their  authority  under  the  HSR  Act,  use  reasonable  efforts  to  obtain  antitrust  clearance  for  the  transactions  contemplated
hereunder as soon as practicable, and otherwise cooperate with each other in the United States governmental antitrust clearance
process.  Subject  to  Applicable  Law  relating  to  the  exchange  of  information,  each  of  Roche  and  Dicerna  shall  consult  and
cooperate with one another, and consider in good faith the views of one another, in connection with any analyses, appearances,
presentations, memoranda, briefs, arguments, opinions and proposals made or submitted by or on behalf of any Party hereto in
connection  with  proceedings  under  or  relating  to  the  HSR  Act.  Roche  and  Dicerna  shall  cooperate  fully  with  each  other  in
connection with the making of all such filings or responses. Each Party shall bear its own fees in connection with its respective
filing under this Section 22.4 and each Party shall bear their respective attorneys’ fees in connection therewith. This Agreement
shall  bind  the  Parties  upon  execution  and  continue  in  full  force  and  effect  unless  and  until  the  termination  or  expiration  of  the
Agreement  by  its  terms;  provided,  however,  that  this  Agreement  (including  Dicerna’s  grant  of  license  rights  hereunder,  Roche’s
obligation  to  make  the  payments  hereunder,  and  each  Party’s  performance  of  discovery,  research,  transfer  development,
communications with regulatory authorities and other activities, and other rights and obligations hereunder in connection with the
Compounds  and  Products),  other  than  this  Section  22.4,  shall  not  become  effective  or  binding  unless  and  until  each  of  the
following conditions are met: (i) the waiting period provided by the HSR Act shall have expired or been terminated, (ii) no court or
administrative  challenges  to  the  transactions  commenced  by  the  FTC  or  DOJ  are  pending,  and  (iii)  no  court  or  administrative
orders  commenced  by  the  FTC  or  DOJ  are  outstanding  blocking  the  completion  of  the  transactions,  (the  date  of  such,  the
“Effective Date”). Nothing in this Agreement shall require or be deemed to require either Party (or their Affiliates) to commit to any
divestitures  or  licenses  or  agree  to  hold  separate  any  assets  or  agree  to  any  similar  arrangements  or  commit  to  conduct  its
business  in  a  specified  manner,  or  to  submit  and  respond  to  a  formal  discovery  procedure  initiated  by  the  FTC  or  DOJ  (i.e.,  a
“Request for Additional Information and Documentary Materials” also known as a “second request”, or Civil Investigative Demand
if  a  filing  is  not  required  under  the  HSR  Act),  in  each  case  as  a  condition  to  obtaining  antitrust  clearance  for  the  transactions
contemplated  hereunder.  If  antitrust  clearance  is  not  received  on  or  before  [*  *  *]  after  the  date  on  which  both  Parties  have
submitted  to  the  FTC  and  DOJ  their  respective  initial  filings  to  request  antitrust  clearance  of  the  transactions  hereunder,  then
either  Party  shall  have  the  right  to  terminate  this  Agreement,  but  prior  to  receipt  of  antitrust  clearance  of  the  transactions
contemplated hereunder, by written notice to the other Party.

22.5 Assignment
Neither Party shall have the right to assign the present Agreement or any part thereof to any Third Party (other than Affiliates )
without the prior written approval of the other Party; provided that, either Party may, without the prior written approval of the other
Party,  assign  this  Agreement  and  its  rights  and  obligations  hereunder  (or  under  a  transaction  under  which  this  Agreement  is
assumed) to the

acquirer of or successor to such Party in connection with a Change of Control (and shall so assign in connection with a sale of all
or substantially all of the assets of such Party as further described in Section 20.2.3).

22.6 Debarment
Each  Party  represents  and  warrants  that  neither  it  nor  its  employees  have  been  debarred  under  21  U.S.C.  §335a,  disqualified
under  21  C.F.R.  §312.70  or  §812.119,  sanctioned  by  a  Federal  Health  Care  Program  (as  defined  in  42  U.S.C  §1320  a-7b(f)),
including  the  federal  Medicare  or  a  state  Medicaid  program,  or  debarred,  suspended,  excluded  or  otherwise  declared  ineligible
from  any  other  similar  Federal  or  state  agency  or  program  (“Debarred”).  In  the  event  a  Party  or  an  employee  of  such  Party
receives notice of debarment, suspension, sanction, exclusion, ineligibility or disqualification under the above-referenced statutes,
such Party shall immediately notify the other Party in writing. Each Party and its Affiliates will not knowingly allow any Debarred
employee to conduct activities under this Agreement.

22.7 Independent Contractor
No employee or representative of either Party shall have any authority to bind or obligate the other Party to this Agreement for any
sum or in any manner whatsoever or to create or impose any contractual or other liability on the other Party without said Party's
prior written approval. For all purposes, and notwithstanding any other provision of this Agreement to the contrary, each Party's
legal relationship to the other Party under this Agreement shall be that of independent contractor, and nothing contained in this
Agreement  shall  be  deemed  or  construed  to  create  a  partnership,  joint  venture,  employment,  franchise,  agency  or  fiduciary
relationship between the Parties.

22.8 Unenforceable Provisions and Severability
If any of the provisions of this Agreement are held to be void or unenforceable, then such void or unenforceable provisions shall
be  replaced  by  valid  and  enforceable  provisions  that  will  achieve  as  far  as  possible  the  economic  business  intentions  of  the
Parties,  however  the  remainder  of  this  Agreement  will  remain  in  full  force  and  effect,  provided  that  the  material  interests  of  the
Parties are not affected, i.e. the Parties would presumably have concluded this Agreement without the unenforceable provisions.

22.9 Waiver
The failure by either Party to require strict performance and/or observance of any obligation, term, provision or condition under this
Agreement  will  neither  constitute  a  waiver  thereof  nor  affect  in  any  way  the  right  of  the  respective  Party  to  require  such
performance and/or observance. The waiver by either Party of a breach of any obligation, term, provision or condition hereunder
shall not constitute a waiver of any subsequent breach thereof or of any other obligation, term, provision or condition.

22.10Interpretation
Except where the context expressly requires otherwise:

(a) the use of any gender herein shall be deemed to encompass references to either or both genders, and the use of the singular

shall be deemed to include the plural (and vice versa),

(b) the words “include”, “includes” and “including” shall be deemed to be followed by the phrase “without limitation”,

(c) any definition of or reference to any agreement, instrument or other document herein shall be construed as referring to such

agreement, instrument or other document as from time to time

amended,  supplemented  or  otherwise  modified  (subject  to  any  restrictions  on  such  amendments,  supplements  or
modifications set forth herein),

(d) any reference herein to any Party or Third Party or person shall be construed to include the Party’s or Third Party’s or person’s

permitted successors and assigns,

(e) the words “herein”, “hereof” and “hereunder”, and words of similar import, shall be construed to refer to this Agreement in its

entirety and not to any particular provision hereof,

(f) all references herein to Articles, Sections or Appendices shall be construed to refer to Articles, Sections or Appendices of this

Agreement, and references to this Agreement include all Appendices hereto,

(g) references to any specific law, rule or regulation, or article, section or other division thereof, shall be deemed to include the

then-current amendments thereto or any replacement or successor law, rule or regulation thereof, and

(h) the term “or” shall be interpreted in the inclusive sense commonly associated with the term “and/or”.

22.11Entire Understanding
This Agreement contains the entire agreement and understanding between the Parties hereto with respect to the within subject
matter  and  supersedes  any  and  all  prior  agreements,  understandings  and  arrangements,  whether  written  or  oral,  and  all  other
communications between the Parties with respect to such subject matter. In case of inconsistencies between this Agreement and
any Appendix hereof, the terms of this Agreement shall prevail unless agreed to explicitly that the Appendix should prevail. This
Agreement shall be binding upon and inure to the benefit of the Parties and their respective legal representatives, successors and
permitted  assigns.  The  Parties  acknowledge  and  agree  that,  as  of  the  Effective  Date,  all  Confidential  Information  disclosed
pursuant to the CDA by a Party or its Affiliates shall be included in the Confidential Information subject to this Agreement and the
Confidentiality  Agreement  is  hereby  superseded  in  its  entirety;  provided,  that  the  foregoing  shall  not  relieve  any  Person  of  any
right  or  obligation  accruing  under  the  Confidentiality  Agreement  prior  to  the  Effective  Date.  “CDA”  means  the  Non-Disclosure
Agreement between Dicerna and Roche US dated February 5, 2019.

22.12Amendments
No amendments of or modifications to the terms and conditions of this Agreement shall be binding upon either Party hereto unless
in writing and signed by both Parties.

22.13Invoices

22.13.1Invoices to Roche
All invoices for payments to Dicerna that are required or permitted hereunder shall be in writing (or via email if directed by Roche)
and sent by Dicerna to Roche at the following address or such other address (including email) as Roche may later provide:

F. Hoffmann-La Roche Ltd
Kreditorenbuchhaltung
Grenzacherstrasse 124
4070 Basel
Switzerland
Attn: (name of a Roche Alliance Director at the time)

22.13.2Invoices to Dicerna
All invoices for payments to Roche that are required or permitted hereunder shall be in writing and sent by Roche to Dicerna via e-
mail to the following addresses or such other address as Dicerna may later provide:

Accounts Payable: [* * *]
David Miller: [* * *]

22.14Notice
All notices that are required or permitted hereunder shall be in writing and sufficient if delivered personally, sent by facsimile (and
promptly confirmed by personal delivery, registered or certified mail or overnight courier), sent by nationally recognized overnight
courier or sent by registered or certified mail, postage prepaid, return receipt requested, addressed as follows:

if to Dicerna, to:

and:

if to Roche, to:

and:

Dicerna Pharmaceuticals, Inc.
33 Hayden Avenue
Lexington, MA 02421
U.S.A.
Attn: Dicerna CEO

Dicerna Pharmaceuticals, Inc.
33 Hayden Avenue
Lexington, MA 02421
U.S.A.
Attn: Dicerna Legal Department
Email: [* * *]

F. Hoffmann-La Roche Ltd
Grenzacherstrasse 124
4070 Basel
Switzerland
Attn: Legal Department

Hoffmann-La Roche Inc.
150 Clove Road
Suite 8
Little Falls, New Jersey 07424
U.S.A.
Attn. Corporate Secretary

or to such other address as the Party to whom notice is to be given may have furnished to the other Party in writing in accordance
herewith.

22.15Force Majeure

Neither Party shall be responsible to the other for any failure or delay in performing any of its obligations under this Agreement or
for  other  nonperformance  hereunder  (excluding,  in  each  case,  the  obligation  to  make  payments  when  due)  if  such  delay  or
nonperformance is caused by strike, fire, flood, earthquake, accident, war, act of terrorism, act of God or of the government of any
country or of any local government, or by any other cause unavoidable or beyond the control of any Party hereto. In such event,
such affected Party shall use Commercially Reasonable Efforts to resume performance of its obligations and will keep the other
Party informed of actions related thereto.

22.16Further Assurances
Roche and Dicerna hereby covenant and agree without the necessity of any further consideration, to execute, acknowledge and
deliver any and all documents and take any action as may be reasonably necessary to carry out the intent and purposes of this
Agreement.

22.17Compliance with Laws
Each  Party  shall,  or  shall  cause  its  Affiliates,  sublicensees  or  Third  Party  contractors  to,  perform  its  obligations  under  this
Agreement in accordance with all Applicable Laws, including (i) all applicable local, state, federal and national data security and
privacy laws, rules and implementing regulations, including the Health Insurance Portability and Accountability Act (HIPAA) and
General Data Protection Regulation (2016/679), (ii) all applicable laws relating to anti-corruption, anti-kickbacks and anti-money
laundering, including U.S. Foreign Corrupt Practices Act of 1977 and the UK Bribery Act of 2010, (iii) any GCPs, cGLPs, GMPs or
GRPs  (iv)  Internal  Compliance  Codes,  as  applicable  and  (v)  applicable  securities  laws.  No  Party  shall,  or  shall  be  required  to,
undertake any activity under or in connection with this Agreement which violates, or which it believes, in good faith, may violate,
any Applicable Laws.

22.18Export
Laws  and  regulations  of  the  United  States  may  restrict  the  export  and  re-export  of  commodities  and  technical  data  of  United
States  origin.  Neither  Party  shall  export  or  re-export  restricted  commodities  or  the  technical  data  of  the  other  Party  in  any  form
without appropriate United States and foreign government licenses.

22.19No Third Party Beneficiary Rights
This Agreement is not intended to and shall not be construed to give any Third Party any interest or rights (including any Third
Party  beneficiary  rights)  with  respect  to  or  in  connection  with  any  agreement  or  provision  contained  herein  or  contemplated
hereby, except as otherwise expressly provided for in this Agreement.

22.20Counterparts; Electronic Signatures
This Agreement may be executed in one or more counterparts, each of which will be deemed an original, and all of which together
will be deemed to be one and the same instrument.

[Signature Page Follows]

IN WITNESS WHEREOF, the Parties have entered into this Agreement as of the Effective Date.

Dicerna Pharmaceuticals, Inc.

___/s/ Douglas Fambrough_____________
Name: Douglas Fambrough
Title: CEO

F. Hoffmann-La Roche Ltd

____/s/ Vikes Kabra___________________
Name: Vikes Kabra
Title: Head of Transaction Excellence

_______/s/ Stefan Arnold________________
Name: Stefan Arnold
Title: Head of Legal Pharma

Hoffmann-La Roche Inc.

_____/s/ John P. Parise_________________
Name: John. P Parise
Title: Authorized Signatory

[* * *]

Appendix 1.41

Dicerna Base Patent Rights

83

Appendix 1.43

Dicerna GalXC Platform Patent Rights
as of the Effective Date

Priority Applications

Title

National Applications

[* * *] [* * *]

[* * *] [* * *]

[* * *] [* * *]

[* * *] [* * *]

[* * *]

Priority Applications

Title

National Applications

[* * *] [* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

84

[* * *]

Appendix 1.91

85

[* * *]

Appendix 2.4.2

86

[* * *]

Appendix 10.6.3

87

Appendix 16.1.5

Existing Third Party In-License Agreement

[* * *]

88

Appendix 19.3

Form of Press Release

Dicerna Enters Agreement with Roche to Develop and Commercialize 
DCR-HBVS for the Treatment of Chronic Hepatitis B Virus (HBV) Infection

– Roche to gain worldwide license to Dicerna’s novel RNAi therapy currently in Phase 1 –
– Dicerna to receive $200 million upfront plus up to $1.47 billion in potential milestone payments related to DCR-HBVS
–
– Dicerna to retain option to co-fund pivotal development of DCR-HBVS worldwide and 
co-promote in U.S. with enhanced royalties –
– Collaboration includes discovery and development of additional therapies targeting multiple additional gene targets
implicated in chronic HBV infection –

CAMBRIDGE,  Mass.,  November  1,  2019  –  Dicerna™  Pharmaceuticals,  Inc.  (Nasdaq:  DRNA)  today  announced  a
research  collaboration  and  licensing  agreement  with  Roche  (SIX:  RO,  ROG;  OTCQX:  RHHBY)  to  develop  novel
therapies  for  the  treatment  of  chronic  hepatitis  B  virus  (HBV)  infection  using  Dicerna’s  proprietary  GalXC™  RNAi
platform  technology.  The  collaboration  will  focus  on  worldwide  development  and  commercialization  of  DCR-HBVS,
Dicerna’s  investigational  therapy  in  Phase  1  clinical  development.  The  collaboration  also  includes  the  discovery  and
development of therapies targeting multiple additional human and viral genes associated with HBV infection using the
technology platforms of both companies.

“Dicerna  is  excited  to  collaborate  with  Roche  to  realize  the  full  potential  of  DCR-HBVS  and  leverage  our  GalXC
platform  to  target  and  silence  specific  genes  that  contribute  to  chronic  hepatitis  B  virus  infection,”  said  Douglas  M.
Fambrough,  Ph.D.,  president  and  chief  executive  officer  of  Dicerna.  “With  its  deep  expertise  in  HBV  and  established
global  infrastructure,  Roche  is  ideally  suited  to  help  us  accelerate  the  development  and  commercialization  of  DCR-
HBVS, pursue a cure for chronic HBV infection, and address this serious global threat to public health.”

"We are excited to engage in a clinical partnership and research collaboration with Dicerna,” said John Young, global
head  of  Infectious  Diseases  at  Roche  Pharma  Early  Research  &  Development.  “This  partnership  builds  upon  our
existing portfolio and internal expertise and positions us well to develop a best-in-disease therapy to cure chronic HBV
infection."

89

Under the terms of the agreement, Dicerna will receive $200 million in an initial upfront payment and may be eligible to
receive  up  to  an  additional  $1.47  billion  over  time  for  the  achievement  of  specified  development,  regulatory  and
commercial  milestones.  In  addition,  Dicerna  may  be  eligible  to  receive  royalties  based  on  potential  product  sales  of
DCR-HBVS.  Dicerna  retains  an  option  to  co-fund  pivotal  development  of  DCR-HBVS  worldwide,  which  if  exercised,
entitles Dicerna to receive enhanced royalties and co-promote products including DCR-HBVS in the U.S.

Dicerna  and  Roche  also  agreed  to  collaborate  on  the  research  and  development  of  additional  therapies  targeting
multiple human and viral genes implicated in chronic HBV infection, using technology from both companies, for which
Dicerna is eligible to receive additional milestones and royalties on any potential products.

The  transaction  is  subject  to  the  expiration  or  termination  of  the  waiting  period  under  the  Hart-Scott-Rodino  Antitrust
Improvements Act of 1976 and other customary conditions.

About Chronic Hepatitis B Virus (HBV) Infection
Hepatitis  B  virus  (HBV)  is  the  world’s  most  common  serious  liver  infection,  with  more  than  292  million  patients
chronically infected, according to the World Health Organization. Chronic HBV infection, a condition characterized by
the  presence  of  the  HBV  surface  antigen  (HBsAg)  for  six  months  or  more,  claims  more  than  800,000  lives  annually.
HBV is also the primary cause of liver cancer (also known as hepatocellular carcinoma or HCC), which is the second-
leading cause of cancer deaths in the world.1 

About DCR-HBVS and the DCR-HBVS-101 Clinical Trial
DCR-HBVS  is  an  investigational  drug  in  development  for  the  treatment  of  chronic  hepatitis  B  virus  (HBV)  infection.
Current therapies for HBV, such as nucleoside analogs, can provide long-term viral suppression if taken continuously,
but they rarely lead to long-term functional cures, as measured by the clearance of HBV surface antigen (HBsAg) and
sustained HBV deoxyribonucleic acid (DNA) suppression in patient plasma or blood. By contrast, DCR-HBVS employs
RNA interference to selectively knock down specific genes involved in the creation of HBV messenger RNA (mRNA)
and the entry of the virus into liver cells. This approach leads to greater than 99.9% reduction in circulating HBsAg, as
observed in mouse models of HBV infection. These data suggest that DCR-HBVS may induce clearance of HBsAg and
contribute meaningfully to a functional cure for HBV.

Dicerna is conducting a Phase 1, randomized, placebo-controlled study designed to evaluate the safety and tolerability
of DCR-HBVS in healthy volunteers (HVs) and in patients with non-cirrhotic chronic HBV infection.

About Dicerna's GalXC™ RNAi Technology Platform
Dicerna’s proprietary RNA interference (RNAi) technology platform, called GalXC™, aims to advance the development
of  next-generation  RNAi-based  therapies  designed  to  silence  disease-driving  genes  in  the  liver  and  other  body
systems. Liver-targeted GalXC-based compounds enable subcutaneous delivery of RNAi therapies that are designed
to  specifically  bind  to  receptors  on  liver  cells,  leading  to  internalization  and  access  to  the  RNAi  machinery  within  the
cells. The GalXC approach seeks to optimize the activity of the RNAi pathway so that it operates in the most specific
and potent fashion. Compounds produced via GalXC are intended to be broadly applicable across multiple therapeutic
areas, including both liver and non-liver indications.
About DicernaTM Pharmaceuticals, Inc.
Dicerna™ Pharmaceuticals, Inc., is a biopharmaceutical company using ribonucleic acid (RNA) interference (RNAi) to
develop  medicines  that  silence  genes  that  cause  disease.  The  Company’s  proprietary  GalXC™  technology  is  being
applied  to  develop  potent,  selective,  and  safe  RNAi  therapies  for  treatment  of  rare  diseases,  chronic  liver  diseases,
cardiovascular diseases, neurodegenerative diseases, pain, and viral infectious disease. Dicerna aims to treat disease
by addressing the underlying causes of illness with capabilities that extend beyond the liver to address a broad range of
diseases,  focusing  on  target  genes  where  connections  between  gene  and  disease  are  well  understood  and
documented.  Dicerna  intends  to  discover,  develop,  and  commercialize  novel  therapies  either  on  its  own  or  in
collaboration  with  pharmaceutical  partners.  Dicerna  has  strategic  collaborations  with  Roche,  Eli  Lilly  and  Company
(Lilly),  Alexion  Pharmaceuticals,  Inc.  (Alexion),  and  Boehringer  Ingelheim  International  GmbH  (BI).  For  more
information, please visit www.dicerna.com.

Dicerna Forward-Looking Statement
This  press  release  includes  forward-looking  statements.  Such  forward-looking  statements  are  subject  to  risks  and
uncertainties  that  could  cause  actual  results  to  differ  materially  from  those  expressed  or  implied  in  such  statements.
Examples of forward-looking statements include, among others, statements we make regarding: (i) the full potential of
DCR-HBVS and to leverage our GalXC platform to target and silence specific genes that contribute to HBV cures; (ii)
the potential to earn revenue from royalties and milestone payments under the collaboration with Roche; (ii) research
and  development  plans  related  to  GalXC  and  its  utility  in  silencing  genes  that  contribute  to  HBV;  (iii)  the  potential  of
RNAi therapies for the treatment of chronic HBV infection; and (iv) the potential for the collaboration between Roche
and Dicerna. The process by which an early-stage platform such as GalXC could potentially lead to an approved

product  is  long  and  subject  to  highly  significant  risks,  particularly  with  respect  to  a  preclinical  research  collaboration.
Applicable  risks  and  uncertainties  include  those  relating  to  preclinical  research  and  other  risks  identified  under  the
heading "Risk Factors" included in Dicerna's most recent Form 10-Q filings and in other future filings with the Securities
and  Exchange  Commission.  The  forward-looking  statements  contained  in  this  press  release  reflect  Dicerna's  current
views with respect to future events, and Dicerna does not undertake and specifically disclaims any obligation to update
any forward-looking statements, except as required by law.

Dicerna™ and GalXC™ are trademarks of Dicerna Pharmaceuticals, Inc.

Reference
1.  Hepatitis  B  Foundation.  Facts  and  Figures.  2019.  Available  at:  http://www.hepb.org/what-is-hepatitis-b/what-is-
hepb/facts-and-figures/. Accessed on October 25, 2019.

Contacts
Investors:
Stern Investor Relations, Inc.
Lauren Stival, 212-698-8646
Lauren.stival@sternir.com

Media:
SmithSolve
Alex Van Rees, 973-442-1555 ext. 111
alex.vanrees@smithsolve.com

CERTAIN INFORMATION IDENTIFIED BY BRACKETED ASTERISKS ([* * *]) HAS BEEN OMITTED FROM THIS
EXHIBIT BECAUSE IT IS BOTH NOT MATERIAL AND WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY
DISCLOSED.

Exhibit 10.47

COLLABORATION AND LICENSE AGREEMENT

between

NOVO NORDISK A/S

and

DICERNA PHARMACEUTICALS, INC.

NOVEMBER 15, 2019

1.DEFINITIONS AND INTERPRETATIONS    1

2.TARGET SELECTION AND VALIDATION    24

2.1Target Selection, Validation, and Development Candidates.    24

2.2Development Candidates.    25

2.3Reserved and Option Targets.    26

2.4Gatekeeper Process.    29

2.5Scope of Blocked Targets    31

2.6Encumbered Targets    31

3.EXCLUSIVITY    31

3.1Hepatocyte Target Exclusivity – R&D Collaboration Term.    31

3.2Development Candidate and Product Exclusivity – Term of Agreement,    32

3.3Novo Options for Dicerna Reserved Orphan Liver Target.    32

3.4Limited Novo Exclusivity.    33

3.5Blocked Targets and Third Party Agreements.    34

4.RESEARCH AND PRODUCT DEVELOPMENT    34

4.1Research and Development Program.    34

4.2Research and Development Activities.    35

4.3Clinical Development Activities.    35

4.4Costs of Performance.    35

4.5IND Filing    37

4.6Records, Reports and Audits.    37

4.7Certain Standards Applicable to Work    38

4.8Right to Subcontract    39

5.MANUFACTURING AND COMMERCIALIZATION    40

5.1Compound and Product Manufacturing Generally.    40

5.2Product Quality Generally    41

5.3Commercialization by Novo    41

5.4Co-Development Payments    41

6.GOVERNANCE AND JOINT STEERING COMMITTEE    43

6.1Project Leader    43

6.2Program Leader    44

6.3Alliance Leader    44

i

 
6.4Working Groups    44

6.5Joint Steering Committee.    45

7.LICENSES    47

7.1License Grant to Novo    47

7.2Sublicenses    47

7.3License Grants to Dicerna    47

7.4Know-How Transfer; Availability of Employees    47

7.5Covenants    48

7.6Mutual Use of Confidential Information    48

7.7No Implied Licenses    48

7.8Third Party IP Agreements.    49

8.FINANCIAL PROVISIONS    50

8.1Upfront Payment; Escrow    50

8.2Annual Fee    50

8.3Pre-Clinical Milestones; DC Milestones    51

8.4Development and Regulatory Milestones    51

8.5Commercialization Milestones    53

8.6Royalties.    53

8.7Co-Development Programs.    56

9.REPORTS AND PAYMENT TERMS    56

9.1Net Sales Reports and Royalties Due    56

9.2Payment Currency / Exchange Rate    56

9.3Novo Nordisk Invoicing Instructions    56

9.4Taxes    57

9.5Audit Rights (Financial).    58

10.INTELLECTUAL PROPERTY RIGHTS    59

10.1Disclosure of Inventions    59

10.2Notification of Issuance    59

10.3Novo Background IP    59

10.4Dicerna Background IP    59

10.5Program Inventions; Joint Inventions.    60

10.6Cooperation    61

ii

 
10.7Filing, Prosecution, Enforcement and Defense.    61

10.8Management of Novo Background Patents    64

10.9Product Infringement    64

10.10Product Trademarks    65

10.11Inventorship and Title    65

10.12Invention Disclosure and Recordkeeping    65

10.13Consultation on Program Inventions    66

11.CONFIDENTIALITY    66

11.1Duty of Confidence    66

11.2Exceptions    66

11.3Authorized Disclosures    66

11.4Performance; Regulatory Approvals    67

11.5Disclosure of Agreement    68

11.6Breaches of Confidentiality; Assistance in Respect of Same    69

11.7Security    69

12.PUBLICATIONS AND PUBLICITY    69

12.1Publications    69

12.2Publicity    70

13.HSR FILINGS AND CLOSING    70

13.1HSR Filings    70

13.2Conduct Pending HSR Clearance Date    71

14.TERM AND TERMINATION    71

14.1Term    71

14.2Voluntary Termination    71

14.3Termination for Cause.    72

14.4Alternative to Termination    73

15.EFFECTS OF TERMINATION    73

15.1Termination of Agreement    73

15.2Target/Product Return.    74

15.3Survival    76

15.4Termination Not Sole Remedy    76

15.5Bankruptcy Code    77

iii

 
16.REPRESENTATIONS AND WARRANTIES    77

16.1Representations and Warranties by Each Party    77

16.2Representations, Warranties and Covenants by Dicerna    79

16.3No Other Warranties    81

17.INDEMNIFICATION AND LIABILITY    81

17.1Indemnification by Dicerna    81

17.2Indemnification by Novo    81

17.3Indemnification Procedure.    82

17.4SPECIAL, INDIRECT, AND OTHER LOSSES    83

17.5Insurance    83

18.COMPLIANCE    83

18.1Compliance with this Agreement    83

18.2Compliance with Party Specific Regulations    83

18.3Compliance with Internal Compliance Codes    83

18.4Compliance with Anti-Corruption Laws    84

18.5Prohibited Conduct    84

18.6Responsible Business    84

19.GENERAL PROVISIONS    84

19.1Assignment    84

19.2Effects of Assignment, Change of Control    85

19.4Severability    86

19.5Governing Law; English Language    86

19.6Dispute Resolution.    86

19.7Continued Performance During Pendency of Arbitral Matters    88

19.8Consent to Non-Exclusive Jurisdiction; Service of Process    88

19.9Force Majeure    88

19.10Waivers and Amendments    88

19.11Relationship of the Parties    88

19.12Notices    88

19.13Further Assurances    89

19.14Compliance with Law    90

19.15No Third Party Beneficiary Rights    90

iv

 
19.16Entire Agreement    90

19.17Counterparts    90

19.18Expenses    90

19.19Binding Effect    90

19.20Construction    90

19.21Interpretation    90

19.22Cumulative Remedies    91

19.23Export    91

List of Exhibits:

Exhibit A –     Work Flow Plan
Exhibit B –     Initial Research Plan
Exhibit C –     Novo Nordisk A/S’s Invoicing Instructions
Exhibit D –     Press Release
Exhibit E –     Existing Patents
Exhibit F –     Co-Development Programs Profit Sharing
Exhibit G –     Co-Promotion Principles
Exhibit H –    Dicerna Competitors
Exhibit I –     Dicerna Contract Manufacturers
Exhibit J –     Patent Prosecution: Default Countries & Territories
Exhibit K –     [Intentionally Omitted]
Exhibit L –     Use of Human Biosamples and Informed Consent
Exhibit M –     NOVO Principles for the Use of Animals

v

 
COLLABORATION AND LICENSE AGREEMENT

THIS COLLABORATION AND LICENSE AGREEMENT (the “Agreement”), entered into as of November 15, 2019
(the “Signing Date”) is by and between NOVO NORDISK A/S, a corporation organized and existing under the laws of Denmark,
having an address at Novo Allé, 2880 Bagsvaerd, Denmark, CVR No. 24 25 67 90 (“Novo”), on the one hand, and DICERNA
PHARMACEUTICALS,  INC.,  a  corporation  organized  and  existing  under  the  laws  of  Delaware,  with  its  principal  place  of
business at 33 Hayden Avenue, Lexington, Massachusetts 02421, U.S.A. (“Dicerna”),  on the other hand.  Dicerna  and  Novo  are
each referred to individually as a “Party” and together as the “Parties”.

BACKGROUND

A.

Novo  is  a  leading  global  health  care  company  engaged  in  the  research,  development  and  commercialization  of

pharmaceutical products.

B.        Dicerna  has  developed  a  RNAi  platform  technology  targeting  hepatocytes  in  the  liver  using  GalXC  Molecules  (as
defined below) to silence mRNA molecules, which may lead to therapeutic uses of such GalXC Molecules in patients with unmet
medical needs.

C.        Novo  and  Dicerna  desire  to  enter  into  this  Agreement  to  allow  the  Parties  to  collaborate  using  Dicerna’s  GalXC
Platform  in  selecting  hepatocyte  gene  targets  and  identifying  GalXC  Molecules  from  which  one  or  more  Products  could  be
developed to treat liver-associated cardiometabolic diseases, including non-alcoholic steatohepatitis, and potentially other diseases
in each case, on terms set forth in this Agreement.

D.    Novo desires to obtain exclusive and nonexclusive licenses from Dicerna to support the activities conducted pursuant to
the  research  and  development  program  and  to  enable  Novo  to  Commercialize  Products  derived  from  or  containing  compounds
developed pursuant to this Agreement, and Dicerna is willing to grant such rights to Novo subject to the terms and conditions as set
forth below.

E.    The Parties desire to jointly participate in the Development and Commercialization of certain Products.

F.    Concurrently with the entering into of this Agreement, Dicerna and Novo are entering into a Share Issuance Agreement,

pursuant to which Novo will purchase certain shares of Dicerna’s Common Stock on the terms and conditions set forth therein.

NOW THEREFORE, in consideration of the mutual covenants and agreements contained herein, the sufficiency which is

acknowledged by both Parties, the Parties agree as follows:

1

1.

DEFINITIONS AND INTERPRETATIONS

Capitalized terms used in this Agreement shall have the meanings specified in this Article 1, or as defined elsewhere in this

Agreement.

1.1    “Acceptance for Filing” means, following the submission of an application for Marketing Authorization made to a
Regulatory Authority, the expiration of any applicable waiting period during which the Regulatory Authority has authority to issue
a refusal to file, if any, as to such application.

1.2    “Accounting Firm” has the meaning set forth in Section 9.5.1.

1.3        “Accounting  Standards”  means  accounting  determinations  made  according  to  (i)  U.S.  Generally  Accepted
Accounting Principles, with respect to Dicerna and its Affiliates, and (ii) International Financial Reporting Standards, with respect
to Novo and its Affiliates.

1.4    “Acquirer” has the meaning set forth in Section 1.24.

1.5    “Act” means, as applicable, the United States Federal Food, Drug, and Cosmetic Act, 44 U.S.C. §§ 301 et seq., or the

Public Health Service Act, 42 U.S.C. §§ 262 et seq., as such may be amended from time to time.

1.6    “Action” has the meaning set forth in Section 10.7.5.

1.7    “Affiliate” means, with respect to a Party, a person, corporation, company, partnership, joint venture or other entity,
which Controls, is Controlled by, or is under common Control with such Party. For the purpose of this definition, “Control” of an
entity means the ownership, directly or indirectly, of more than fifty percent (50%) of the outstanding voting securities or capital
stock  of  such  entity,  or  the  legal  power  to  direct  or  cause  the  direction  of  the  general  management  and  policies  of  the  entity  in
question. An entity will be deemed to be an Affiliate for so long as such Control exists. Novo Holdings A/S, the Novo Nordisk
Foundation, and Novozymes A/S and their respective Excluded Affiliates (other than Novo and its subsidiaries) are not considered
Affiliates  of  Novo.  “Excluded  Affiliates”  means  with  respect  to  Novo  Holdings  A/S,  the  Novo  Nordisk  Foundation,  and
Novozymes A/S and any person, corporation, company, partnership, joint venture or other entity, which Controls, is Controlled by,
or is under common Control with such entities.

1.8    “Alexion” has the meaning set forth in Section 1.18.

1.9    “Alexion Agreement” has the meaning set forth in Section 1.18.

1.10    “Alliance Leader” has the meaning set forth in Section 6.3.

1.11    “Annual Net Sales” means, on a Product-by-Product basis, for a given Calendar Year, all Net Sales of such Product

throughout the Territory during such Calendar Year.

2

1.12    “Applicable Laws” means all federal, state, local, national and supra-national laws, statutes, rules and regulations,
including  any  rules,  regulations,  guidelines  or  requirements  of  Regulatory  Authorities,  taxing  authorities,  national  securities
exchanges or securities listing organizations that may be in effect from time to time during the Term and applicable to a particular
activity hereunder.

1.13    “Audited Party” has the meaning set forth in Section 9.5.1.

1.14    “Auditing Party” has the meaning set forth in Section 9.5.1.

1.15    “BI” has the meaning set forth in Section 1.18.

1.16    “BI Agreement” means that certain Collaborative Research and License Agreement between BI and Dicerna dated

October 27, 2017, as (subject to Section 2.5) amended and in effect from time to time.

1.17    “Bioinformatics Package and Mapping Plan” has the meaning set forth in Section 8.1.2.

1.18    “Blocked Target” means targets [* * *].

1.19    “Blocked Target List” has the meaning set forth in Section 2.4.2.

1.20       “Business Day”  means  a  day  on  which  commercial  banking  institutions  are  open  for  business  in  each  of  Boston,

Massachusetts, New York, New York, U.S. and Copenhagen, Denmark.

1.21    “Calendar Day” means any day of the Calendar Year.

1.22       “Calendar Quarter” means any respective period of three (3) consecutive calendar months ending on March 31,

June 30, September 30 and December 31 of any Calendar Year.

1.23       “Calendar Year”  means  each  successive  period  of  twelve  (12)  months  commencing  on  January  1  and  ending  on

December 31.

1.24    “Change of Control” means:

(a)          with  respect  to  either  Party:  (i)  the  acquisition  by  a  Third  Party  or  group  of  Third  Parties  acting  in
concert, in one transaction or a series of related transactions, of direct or indirect beneficial ownership of more than fifty
percent (50%) of the outstanding voting equity securities of such Party; (ii) a merger, transfer of control or consolidation
involving such Party, as a result of which a Third Party or group of Third Parties acting in concert acquires direct or indirect
beneficial ownership of more than fifty percent (50%) of the voting power of the surviving entity immediately after such
merger, reorganization or consolidation; or (iii) a sale, transfer or disposition of all or substantially all of the assets of such
Party in one transaction or a series of related transactions to a Third Party or group of Third Parties acting in concert, but in
any event, excluding any consolidation or merger

3

effected exclusively to change the domicile of a Party where the ultimate indirect share ownership of the Party as a result of
such consolidation or merger does not change. The acquiring or combining Third Party in any of (i), (ii) or (iii), and any of
such  Third  Party’s  Affiliates  (other  than  the  acquired  Party  and  its  Affiliates  as  in  existence  prior  to  the  applicable
transaction) are referred to collectively herein as the “Acquirer”; or

(b)        with  respect  to  Dicerna:  (i)  the  acquisition  by  a  Novo  Competitor  (and/or  Affiliates  of  such  Novo
Competitor)  or  group  of  Third  Parties  (of  which  at  least  one  is  a  Novo  Competitor)  acting  in  concert,  whether  in  one
transaction or a series of related transactions, of: (1) majority control of the board of directors or equivalent governing body
of  Dicerna;  (2)  direct  or  indirect  beneficial  ownership  of  more  than  forty  percent  (40%)  of  the  outstanding  voting  equity
securities of Dicerna; or (ii) a merger, transfer of control or consolidation involving Dicerna, as a result of which a Novo
Competitor  (and/or  Affiliates  of  such  Novo  Competitor)  or  group  of  Third  Parties  (of  which  at  least  one  is  a  Novo
Competitor) acting in concert acquires direct or indirect beneficial ownership of more than forty percent (40%) of the voting
power  of  the  surviving  entity  immediately  after  such  merger,  reorganization  or  consolidation;  or  (iii)  a  sale,  transfer  or
disposition of all or substantially all of the assets of Dicerna related to the transactions contemplated by this Agreement. In
any  such  case,  such  Novo  Competitor  and  its  Affiliates  (other  than  Dicerna  and  its  Affiliates  in  existence  prior  to  the
applicable transaction) shall also be considered an Acquirer of Dicerna.

1.25    “Claims” has the meaning set forth in Section 17.1.

1.26    “Clinical Trial” means a Phase 1 Clinical Trial, Phase 2 Clinical Trial or Phase 3 Clinical Trial, or any post-approval

human clinical trial, as applicable.

1.27    “CMC Activities” means chemistry, manufacturing and controls activities.

1.28    “CMC Working Group” has the meaning set forth in Section 6.4.

1.1    “Co-Development Budget” has the meaning set forth in Section 5.4.1.

1.2        “Co-Development  Percentage”  means  a  percentage  representing  a  designating  Party’s  economic  stake  in  a  Co-
Development Program. Novo as the designating Party under Section 3.3 will designate the percentage of at least [* * *] and not
greater than [* * *] as X percent (X%) and Dicerna will be [* * *] minus X percent ([* * *]-X%). Dicerna as the designating Party
under Sections 2.3.2(c) or 2.3.3 will designate the percentage of at [* * *] and not greater than [* * *] as X percent (X%) and Novo
will be [* * *] minus X percent ([* * *]-X%).

1.3        “Co-Development  Post-Option  Expenses”  means,  with  respect  to  a  given  Co-Development  Program,  the  Co-
Development  Percentage  multiplied  by  the  portion  of  Development  Expenses  incurred  after  designation  as  a  Co-Development
Program.

4

1.4        “Co-Development  Pre-Option  Expenses”  means  with  respect  to  a  given  Co-Development  Program,  the  Co-
Development  Percentage  multiplied  by  the  portion  of  Development  Expenses  incurred  [*  *  *]  until  designation  as  a  Co-
Development Program.

1.5    “Co-Development Product” means a Compound Directed To a Co-Development Target.

1.6    “Co-Development Profit Share” has the meaning set forth in Section 5.4.2.

1.7    “Co-Development Program” means Research of a Co-Development Target, or Development and Commercialization

of a Co-Development Product.

1.8    “Co-Development Target” means a Target that either Dicerna or Novo has designated under Sections 2.3.2, 2.3.3, or

3.3 for co-development and co-commercialization.

1.9    “Code” has the meaning set forth in Section 15.5.

1.10        “Collaboration  Targets”  has  the  meaning  set  forth  in  Section  2.1.1,  including  Validated,  Continuation  and  Co-

Development Targets, but not Discontinued Targets.

1.11    “Combination Product” has the meaning set forth in Section 1.142.

1.12    “Commercial Milestone Event” has the meaning set forth in Section 8.5.

1.13    “Commercial Milestone Payment” has the meaning set forth in Section 8.5.

1.14    “Commercialization” or “Commercialize” means any and all activities directed to the offering for sale and sale of a
Compound,  Product,  or  other  compound,  product  or  therapy  including:  (a)  activities  directed  to  storing,  marketing,  promoting,
detailing,  distributing,  importing,  exporting,  selling  and  offering  to  sell  that  Compound,  Product,  or  other  compound,  product  or
therapy;  (b)  conducting  Clinical  Trials  after  Marketing  Authorization  of  a  Compound,  Product,  or  other  compound,  product  or
therapy  with  respect  to  such  Compound,  Product,  or  other  compound,  product  or  therapy;  (c)  interacting  with  Regulatory
Authorities  regarding  the  foregoing;  and  (d)  seeking  pricing  approvals  and  reimbursement  approvals  (as  applicable)  for  that
Compound, Product or other compound, product or therapy in the Field in the Territory. When used as a verb, “to Commercialize”
and “Commercializing” means to engage in Commercialization and “Commercialized” has a corresponding meaning. For clarity,
“Commercialization” shall not include any Research or Development activities.

1.15    “Commercially Reasonable Efforts” [* * *].

1.16        “Competing  GalXC  Product”  means  any  product  that  contains  a  GalXC  Molecule  Directed  To  a  Collaboration

Target that is being researched, developed, used, made (including formulated) or commercialized by a Third Party.

1.17    “Complement Pathway” [* * *].

5

1.18    “Compound” [* * *].

1.19    “Confidential Information” means all Know-How or other information or materials of a Party, in any form (written,

oral, electronic, photographic, or otherwise) that is confidential or proprietary, including:

(a)    all Know-How which is generated by or on behalf of a Party under this Agreement or which one Party or any of
its  Affiliates  or  representatives  has  provided  or  otherwise  made  available  to  the  other  Party,  including  such  Know-How
comprising or relating to concepts, discoveries, Inventions, data, designs or formulae arising from this Agreement;

(b)    all such information or materials regarding or concerning any Collaboration Target, Compound, Product, or any

other technical or business information;

(c)        all  communications  between  the  Parties  or  information  of  whatever  kind  whether  recorded  or  not  and,  if
recorded, in whatever medium, relating to or arising out of this Agreement, whether disclosed prior to or after entering into
this Agreement;

(d)    any information that the Party indicates in writing is information of a confidential nature or which is marked

“confidential”; and,

(e)       all  copies  and  excerpts  of  the  communications,  information,  notes,  reports  and  documents  in  whatever  form

referred to in subclauses (a) through (d) of this definition.

For purposes of the confidentiality obligations set forth herein and subject to Section 7.6 and for so long as they continue as
Confidential Information under Article 11: (i)  Know-How owned or Controlled by Novo (other than Joint Know-How) shall be
deemed Confidential Information of Novo; (ii) Know-How owned or Controlled by Dicerna (other than Joint Know-How) shall be
deemed  Confidential  Information  of  Dicerna;  (iii)  the  terms  and  conditions  of  this  Agreement  shall  be  deemed  Confidential
Information of both Parties; (iv) any disclosed information which is not publicly available relating to the Blocked Targets and is not
otherwise possessed by Novo (and does not otherwise come into Novo’s possession), including the identity of Dicerna Excluded
Programs,  or  Discontinued  Targets  shall  be  deemed  Confidential  Information  of  Dicerna;  (v)  any  of  Novo’s  Confidential
Information on Novo’s Own Targets prior to selection of such Novo’s Own Targets as Collaboration Targets shall continue to be
Confidential  Information  of  Novo  even  after  such  Novo’s  Own  Targets  become  Discontinued  Targets;  (vi)  for  purposes  of  the
restriction  on  disclosure,  non-public  information  concerning  Collaboration  Targets,  Compounds  and  Products  (including  the
identity,  structure  and/or  properties,  in  each  case,  specific  to  the  Collaboration  Targets,  Compounds  and  Products  in  the  Field,
except for the GalXC Platform) and information contained in the Research Plans shall be deemed Confidential Information of both
Parties; and (vii) for purposes of the restriction on disclosure, Joint Know-How shall be deemed Confidential Information of both
Parties and kept confidential per the terms of Article 11, unless subsequently assigned to the other Party as set forth in Article 10, in
which case, such Know-How shall become the Confidential Information of the assignee. For clarity, nothing in the foregoing shall
limit Sections 3.1 through 3.3 or the exclusive licenses granted to Novo pursuant to Section 7.1). Product-Specific Know-How shall
be used by the Parties only in accordance with the terms of this Agreement.

6

1.20    “Confidentiality Agreement” has the meaning set forth in Section 19.16.

1.21    “Continuation Targets” has the meaning set forth in Section 2.3.4.

1.22        “Control”  or  “Controlled”  means,  with  respect  to  any  Know-How,  or  intellectual  property  right  (including  any
Patent Right), that a Party owns, or has a license to, such Know-How or intellectual property right, in each case to the extent such
Party  has  the  power  to  grant  to  the  other  Party  access,  a  license,  or  a  sublicense  (as  applicable)  to  the  same  on  the  terms  and
conditions set forth in this Agreement; provided that, as to Know-How or Patent Rights first licensed or acquired by Dicerna from a
Third Party after the Effective Date, such Know-How or Patent Right will be included as “Controlled” by Dicerna only if Novo
elects  to  accept  a  sublicense  or  license  in  accordance  with  Section  7.8.1.  Notwithstanding  anything  in  this  Agreement  to  the
contrary, in the event of a Change of Control of a Party, the Party shall be deemed to not Control any intellectual property right that
is  owned  or  controlled  by  the  Acquirer  or  its  Affiliates  prior  to  or  after  the  Change  of  Control,  other  than  Know-How  and
intellectual property rights Controlled by such Party prior to the Change of Control.

1.23    “Co-Promotion Agreement” means a co-promotion agreement for a Co-Development Program for which the Parties
have agreed to co-promote according to Sections 2.3.2(c), 2.3.3(b) (in the US for Dicerna’s option) or 3.3 and to be negotiated by
the Parties based on the co-promotion principles as set forth in Exhibit G.

1.24    “Cover”, “Covering”, or “Covered” means, with respect to Patent Rights, where the use, Manufacture, sale, offer for
sale, import or export of subject matter (including, but not limited to, goods and services such as Products), absent ownership or a
license, would infringe at least one issued and unexpired claim (or a pending claim, if such pending claim were to issue without
modification from a claim in the application as filed) of such Patent Rights which has not been declared invalid or unenforceable by
a patent office or a court of competent jurisdiction in a decision that is unappealable or unappealed.

1.25    “CRO” has the meaning set forth in Section 4.4.2.

1.26        “Data  Package”  means,  with  respect  to  a  given  Collaboration  Target,  a  data  package  that  includes  each  of  the
following: (a) relevant data related to such Collaboration Target, including design and synthesis of the Compound(s) Directed To
the Collaboration Target,  and  any in vitro and in  vivo  validation  and  other  related  research  and  preclinical  data  and  information
relating to such Compound(s) and Collaboration Target; (b) a reasonably detailed analysis of the data related to such Collaboration
Target;  and  (c)  such  other  information  regarding  such  Collaboration  Target  as  Novo  may  otherwise  reasonably  request  that  is  in
Dicerna’s possession and control.

1.27        “DCR-HBVS”  means  the  GalXC  Molecule  known  as  DCR-S219  that  is  identified  in  clinicaltrials.gov  with  the

clinical trial identifier NCT03772249.

1.28        “Default  Countries”  means,  with  respect  to  Program  Inventions  and/or  Product-Specific  Patents  Covering
Compounds and Products advanced to at least a Phase 1 Clinical Trial, each patent application shall at least be filed in the countries
identified in Exhibit J.

7

1.29    “Development” or “Develop” means, with respect to a Compound or Product, any activities after nomination as a
Development Candidate for such Compound or Product, including research, preclinical and other non-clinical testing, test method
development  and  stability  testing,  toxicology,  formulation,  Manufacture,  process  development,  clinical  studies  (including
manufacturing  in  support  thereof,  but  excluding  any  commercial  manufacturing),  statistical  analysis  and  report  writing,  the
preparation and filing of regulatory filings and all regulatory affairs related to the foregoing. When used as a verb, “Developing”
means  to  engage  in  Development  and  “Developed” has a corresponding  meaning. For clarity, “Development”  shall  not  include
any Research or Commercialization activities.

1.30    “Development and Regulatory Milestone Event” has the meaning set forth in Section 8.4.

1.31    “Development and Regulatory Milestone Payment” has the meaning set forth in Section 8.4.

1.32       “Development Budget”  means,  with  respect  to  a  Compound,  projection  of  expected  total  Development  Expenses

through Marketing Authorization from nomination as a Development Candidate.

1.33    “Development Candidate” or “DC” has the meaning set forth in Section 2.2.

1.34        “Development Expenses”  means  all  expenses  incurred  in  accordance  with  the  Accounting  Standards,  directly  or
indirectly, in connection with the Development activities hereunder, including without limitation expenses incurred in connection
with: (i) obtaining, maintaining and/or expanding Regulatory Approval and/or the ability to Manufacture, formulate, use, fill, ship
and/or sell a Product; (ii) data management, statistical designs and studies, document preparation, and other expenses associated
with  clinical  testing  programs;  (iii)  costs  of  process  development  or  improvement,  Manufacturing  Expenses  (including
Manufacturing  activities  occurring  prior  to  nomination  of  a  Development  Candidate  approved  by  Novo  for  use  in  future
Development activities and Manufacturing Expenses incurred in Manufacturing Product inventory in preparation for commercial
sales), scale-up, validation and recovery (including plant costs), in each case including all FTE Expenses for FTEs who perform
activities in furtherance of the foregoing.

1.35    “Development Plan” means, with respect to a Development Candidate, an outline of Development activities to be

conducted and corresponding objectives to be achieved up until Commercialization.

1.36    “Dicerna Background IP” has the meaning set forth in Section 10.4.

1.37    “Dicerna Excluded Programs” means the research and development of compounds or products by Dicerna and its

Affiliates Directed To the Targets identified in subsection (i) of the definition of “Blocked Targets” in Section 1.18 above.

1.38    “Dicerna Indemnified Party” has the meaning set forth in Section 17.2.

8

1.39    “Dicerna Orphan Product” has the meaning set forth in Section 3.3.

1.40    “Dicerna Reserved Orphan Liver Target” has the meaning set forth in Section 2.3.2.

1.1    “Direct Manufacturing Costs” means all direct manufacturing costs and charges for a given Compound or Product,
including:  (a)  direct  manufacturing  charges  reasonably  allocable  to  Compounds  or  Products,  such  as  purchase  of  materials,  (b)
storage and insurance, packaging and shipment thereof, and (c) FTE Expenses (e.g., quality, manufacturing, and chemistry) used
therefor  and  equipment  purchased  for  Compounds  or  Products  and  excluding:  (y)  amortization  of  property  or  equipment  not
specifically related to manufacturing of Products and (z) allocation of general corporate overhead.

1.2    “Directed To” means, with regard to an RNAi product or oligonucleotide product and Target, [* * *]. For clarity, if the
defined term “Directed To” is separated, such as when required grammatically (e.g., when discussing Targets “To which a product
is Directed”), such separated term shall maintain the same meaning set forth in the previous sentence.

1.3    “Discontinued Target” means a Target with [* * *] pursuant to Section 2.3.5 or as to which Novo has exercised a
right of termination under Section 14.2. In case of termination of this Agreement in its entirety under Section 14.2 or under Section
14.3 then all Collaboration Targets shall be Discontinued Targets.

1.4    “Discovery Period” has the meaning set forth in Section 2.1.1.

1.5    “Dispute” has the meaning set forth in Section 19.6.1.

1.6        “Distribution  Expenses”  means  all  expenses  incurred  in  accordance  with  the  Accounting  Standards,  directly  or
indirectly,  in  connection  with  the  distribution  of  Products,  including,  without  limitation,  expenses  for  customer  services,  order
entry, billing, shipping, insurance, tariffs, customs, duties and similar taxes, credit and collection and other such activities, in each
case: (i) except to the extent deducted in the calculation of Net Sales and (ii) including all FTE Expenses for FTEs who perform
activities in furtherance of the foregoing.

1.7    “DOJ” has the meaning set forth in Section 13.1.

1.8    “Dollar” means the United States of America dollar, and “$” and “USD” will be interpreted accordingly.

1.9    “Effective Date” means the HSR Clearance Date.

1.10    “Effective Patent Claim” means any Valid Claim of: (a) a patent; or (b) a pending patent application; in each case
claiming  a  method  of  use  of  a  Compound  or  Product  for  an  approved  use  of  a  Product  or  the  composition  of  matter  (including
formulations) of a Compound or Product and included within the Licensed Patent Rights (including Product-Specific Patents).

1.11    “EMA” means the European Medicines Agency and any successor thereto.

9

1.12    “Escrow Agent” means Silicon Valley Bank or such other bank or other entity selected by the Parties as the escrow

agent under the Escrow Agreement.

1.13    “Escrow Agreement” means the Escrow Agreement entered into as of the Signing Date by and among the Escrow

Agent, Novo and Dicerna to effectuate the intent and purposes of Section 8.1.

1.14    “Excluded Claim” has the meaning set forth in Section 19.6.5.

1.15    “Excluded Field” means any and all uses of the GalXC Platform, including any and all use of the GalXC Molecules

generated by the GalXC Platform, for diagnostic, therapeutic, or prophylactic uses in humans, in an indication whose [* * *].

1.16    “Existing Patents” has the meaning set forth in Section 16.2.3(a).

1.17    “Expenses and Payments” has the meaning set forth in Section 9.5.1.

1.18    “FDA” means the United States Food and Drug Administration and any successor thereto.

1.19    “FFDCA” has the meaning set forth in Section 16.1.5.

1.20    “Field” means any and all diagnostic, therapeutic or prophylactic uses in humans for indications which achieve their

beneficial effect using a [* * *] except [* * *].

1.21        “First Commercial Sale”  means,  in  a  country,  the  first  sale  of  a  Product  by  Novo  or  Dicerna  or  their  respective
Affiliates or their sublicensees, to an unaffiliated Third Party in that country after receipt of all Marketing Authorizations required
to market and sell the Product have been obtained in the country in which such Product is sold. Sales for purposes of testing the
Product and sample purposes shall not be deemed a First Commercial Sale. Furthermore, for purposes of clarity, the term “First
Commercial  Sale”  as  used  in  this  Agreement  shall  not  include:  (i)  any  distribution  or  other  sale  solely  for  so-called  treatment
investigational  new  drug  sales,  named  patient  sales,  compassionate  or  emergency  use  sales  or  pre-license  sales,  in  each  case
provided that such Product is distributed without charge or sold at or below cost; (ii) intercompany transfers to Affiliates of a Party
or between such entities and a sublicensee of a Party or an Affiliate, provided a subsequent sale to an unaffiliated Third Party by
such Affiliate of a Party or sublicensee is not considered an intercompany transfer; nor (iii) other similar non-commercial sales.

1.22    “FTC” has the meaning set forth in Section 13.1.

1.23        “FTE”  means,  with  respect  to  a  person,  the  equivalent  of  the  work  of  one  (1)  employee  full  time  for  [*  *  *]
(consisting of at least [* * *] per year (with no further reductions for vacations and holidays)).  Overtime, and work on weekends,
holidays and the like will not be counted with any multiplier (e.g., time-and-a-half or double time) toward the number of hours that
are used to calculate the FTE contribution. The portion or multiple of an FTE billable by the applicable Party for one (1) individual
during a given accounting period shall be determined by dividing the number of hours worked by said individual on the work to be
conducted under the Agreement during

10

such accounting period and the number of FTE hours applicable for such accounting period based on [* * *] per Calendar Year,
applied consistently throughout the Calendar Year. For clarity, no individual person can ever constitute more than a single FTE.

1.24    “FTE Expenses” means the FTE Rate multiplied by the applicable number of FTEs.

1.25    “FTE Rate” means, for the period commencing on the Effective Date until such time as the Parties agree otherwise,
[* * *] per year, subject to annual increases or decreases beginning on January 1, 2021 to reflect the percentage increase or decrease
in the Consumer Price Index – All Urban Consumers, US City Average, All Items (as quoted by the U.S. Department of Labor,
Bureau of Labor Statistics), and similarly calculated year to year increases each subsequent Calendar Year. The FTE Rate shall be
deemed to encompass compensation for expenses of salaries, benefits, supplies, other employee expenses, and supporting overhead
and general and administration allocations.

1.26    “GalXC Molecule” means an RNAi molecule conjugated to one or more N-acetylgalactosamine (GalNAc) ligands

and designed to be Directed To a Target.

1.27    “GalXC Patents” has the meaning set forth in Section 10.7.1.

1.28        “GalXC  Platform”  means  the  RNAi  technology  platform  Controlled  by  Dicerna,  generating  and  using  GalXC

Molecules to silence one or more mRNA molecules.

1.29    “GalXC Platform IP” means [* * *].

1.30    “Gatekeeper” has the meaning set forth in Section 2.4.1.

1.31    “Generic Product” means, as to a given Product, a product whose sale is not authorized by Novo or its Affiliates or
sublicensees that is (a) approved by a Regulatory Authority as therapeutically equivalent to such Product in a country for at least
one approved indication of the Product in such country, or (b) is approved by a Regulatory Authority by making cross-reference to
and  relying  on  the  safety  and  effectiveness  data  provided  to  such  Regulatory  Authority  for  the  Product  on  the  basis  that  it
demonstrates bioequivalence or biosimilarity or interchangeability to such Product.

1.32        “Global  Profits”  means,  as  to  a  given  Product,  Net  Sales  less  the  following  items:  Manufacturing  Expenses,
Marketing Expenses, Sales Expenses, Patent Expenses, Distribution Expenses, and Development Expenses, for a given period. For
the avoidance of doubt, Co-Development Pre-Option Expenses will not be used to calculate Global Profits.

1.33    “Good Clinical Practices” or “GCP” means all applicable current Good Clinical Practice standards for the design,
conduct, performance, monitoring, auditing, recording, analyses and reporting of Clinical Trials, including, as applicable, (a) as set
forth in the International Conference on Harmonization of Technical Requirements for Registration of Pharmaceuticals for Human
Use (“ICH”) Harmonized Tripartite Guideline for Good Clinical Practice (CPMP/ICH/135/95) and any other guidelines for good
clinical practice for trials on medicinal products in the

11

Territory, (b) the Declaration of Helsinki (2004) as last amended at the 52nd World Medical Association in October 2000 and any
further amendments or clarifications thereto, (c) US Code of Federal Regulations Title 21, Parts 50 (Protection of Human Subjects),
56 (Institutional Review Boards) and 312 (Investigational New Drug Application), as may be amended from time to time, and (d)
the equivalent Applicable Laws in any relevant country, each as may be amended and applicable from time to time.

1.34    “Good Laboratory Practices” or “GLPs” means all applicable Good Laboratory Practice standards, including, as
applicable: (a) as set forth in the then-current good laboratory practice standards promulgated or endorsed by the FDA as defined in
44 C.F.R. Part 58; and (b) the equivalent Applicable Laws in any relevant country, each as may be amended and applicable from
time to time.

1.35        “Good Manufacturing Practices”  or  “GMPs”  means  all  applicable  Good  Manufacturing  Practices  including,  as
applicable: (a) the principles detailed in the US Current Good Manufacturing Practices, 21 C.F.R. Parts 4, 210, 211, 601, 610 and
820;  (b)  European  Directive  2003/94/EC  and  Eudralex  4;  (c)  the  principles  detailed  in  the  WHO  TRS  986  Annex  2,  TRS  961
Annex 6 and TRS 957 Annex 2; (d) ICH Q7 guidelines and (e) the equivalent Applicable Laws in any relevant country, each as
may be amended and applicable from time to time.

1.36    “Good Research Practices” or “GRP” means research practices consistent with the Research Quality Association

(RQA), 2014 Quality in Research Guidelines for Working in Non-Regulated Research.

1.37        “Governmental  Authority”  means  any  court,  commission,  authority,  department,  ministry,  official  or  other
instrumentality  of,  or  being  vested  with  public  authority  under  any  law  of,  any  country,  state  or  local  authority  or  any  political
subdivision thereof, or any association of countries.

1.38    “Hepatocyte Target” means any Target [* * *].

1.39    “HSR Act” has the meaning set forth in Section 13.1.

1.40    “HSR Clearance Date” has the meaning set forth in Section 13.1.

1.41    “Improvement” means any (a) modification, enhancement or change to the Patent Rights or Know-How Controlled
by a Party and its Affiliates and existing as of or after the Signing Date and (b) Patent Rights claiming priority to the Patent Rights
included in Dicerna’s Background IP, with respect to Dicerna, or Novo’s Background IP, with respect to Novo.

1.42    “IND” means an investigational new drug application filed with the FDA with respect to a Compound or a Product,
or  an  equivalent  application  filed  with  a  Regulatory  Authority  in  a  country  other  than  the  United  States  required  to  commence
clinical trials of a pharmaceutical product.

12

1.43       “IND Approval”  of  a  Product  means  that  an  IND  for  such  Product  has  been  submitted  to  the  FDA  or  equivalent
Regulatory Authority and not rejected (including placed on clinical hold) by the FDA or equivalent Regulatory Authority within [*
* *] after such submission.

1.44    “Indemnified Party” has the meaning set forth in Section 17.3.1.

1.45    “Indemnifying Party” has the meaning set forth in Section 17.3.1.

1.1    “Initial Discovery Period” has the meaning set forth in Section 2.1.1.

1.2    “Initial Party” has the meaning set forth in Section 10.7.6.

1.3    “Initial R&D Collaboration Term” has the meaning set forth in Section 4.1.2.

1.4    “Initial Targets” has the meaning set forth in Section 8.1.2.

1.5    “Initiation of GLP Tox Studies” means the first toxicology testing of a Compound under GLP conditions.

1.6        “Internal  Compliance  Codes”  means  a  Party’s  internal  policies  and  procedures  intended  to  ensure  that  a  Party

complies with Applicable Laws, Party Specific Regulations, and such Party’s internal ethical, medical and similar standards.

1.7    “Internal Revenue Code” has the meaning set forth in Section 9.4.2.

1.8    “Invention” means any invention, composition of matter, formulation, article of manufacture, method of manufacture,

method of use or other subject matter, whether patentable or not.

1.9    “Joint Intellectual Property” means Joint Patent Rights and Joint Know-How.

1.10    “Joint Inventions” has the meaning set forth in Section 10.5.1.

1.11    “Joint Know-How” has the meaning set forth in Section 10.5.1.

1.12    “Joint Patent Right” has the meaning set forth in Section 10.5.1.

1.13    “JSC” has the meaning set forth in Section 6.5.1.

1.14    “JSC Chair” has the meaning set forth in Section 6.5.1.

1.15    “Know-How” means all technical, scientific, and other information, know-how, data, Inventions, discoveries, trade
secrets, specifications, instructions, techniques, processes, designs, drawings, formulae, methods, practices, protocols, expertise and
other  information  and  technology  applicable  to  formulations,  compositions  or  products  or  to  their  Manufacture,  development,
registration,  use,  marketing  or  sale  or  to  methods  of  assaying  or  testing  them,  and  all  biological,  chemical,  pharmacological,
biochemical, toxicological, pharmaceutical, physical and analytical, safety, quality control, manufacturing, preclinical and clinical
data relevant to any of the

13

foregoing. For clarity, Know-How includes any such information comprised or embodied in any applicable physical materials, and
excludes Patent Rights.

1.1    “Licensed Know-How” means all Know-How, including Know-How within the GalXC Platform IP, that is Controlled
by Dicerna (or one of its Affiliates) and that is: (a), necessary or reasonably useful for the Research, Development, registration,
Manufacture (including formulation), use or Commercialization of a Compound or Product in the Field (which would include all
Know-How  relating  to  targeting  of  Hepatocyte  Targets  using  the  GalXC  Platform,  excluding  Know-How  exclusively  relating  to
Dicerna  Reserved  Orphan  Liver  Targets  that  are  not  designated  by  Novo  as  Collaboration  Targets  under  Section  2.3.2  or
exclusively  relating  to  Discontinued  Targets);  or  (b)  acquired  (subject  to  Section  7.8.1),  licensed  (subject  to  Section  7.8.1),
conceived,  developed,  created,  made  or  reduced  to  practice,  whether  in  the  course  of  performing  the  R&D  Program  during  the
Term  or  otherwise,  including  Dicerna’s  rights  in  any  Joint  Know-How  and  any  Improvements  to  the  foregoing  Know-How
described in subclause (a).

1.2    “Licensed Patent Rights” means any and all Patent Rights, including Patent Rights within the GalXC Platform IP,
that are Controlled by Dicerna (or one of its Affiliates) and that are: (a) listed in Exhibit E, (b) necessary or reasonably useful for
the  Research,  Development,  registration,  Manufacture  (including  formulation),  use  or  Commercialization  of  a  Compound  or
Product in the Field (which would include all Patent Rights directed to Targets using the GalXC Platform excluding Patent Rights
directed  exclusively  to  Dicerna  Reserved  Orphan  Liver  Targets  that  are  not  designated  by  Novo  as  Collaboration  Targets  under
Section 2.3.2 or exclusively relating to Discontinued Targets), (c) acquired (subject to Section 7.8.1), licensed (subject to Section
7.8.1), conceived, developed, created, made or reduced to practice, whether in the course of performing the R&D Program during
the Term or otherwise, including Dicerna’s rights in any Joint Patent Rights, or (d) directed to Know-How described in subclause
(b) of the definition of “Licensed Know-How,” including Dicerna’s rights in any Joint Patent Rights.

1.3    “Licensed Technology” means, individually or collectively, the Licensed Patent Rights and the Licensed Know-How.

1.4    “Lilly” has the meaning set forth in Section 1.133.

1.5    “Lilly Agreement” means that certain Collaboration and License Agreement between Eli Lilly and Company or its
permitted  successors  and  assigns  (“Lilly”)  and  Dicerna  Pharmaceuticals,  Inc.  together  with  Dicerna  Cayman  dated  October  25,
2018, as (subject to Section 2.5) amended and in effect from time to time.

1.6    “Losses” has the meaning set forth in Section 17.1.

1.7    “Major European Market” means any of [* * *].

1.8    “Major Territory” means: [* * *].

1.9    “Manufacturing” or “Manufacture” means any and all activities directed to manufacturing, processing, packaging,

labeling, filing, finishing, assembly, shipping, storage, or

14

freight of any pharmaceutical product (or any components or process steps involving any product or any companion diagnostic),
placebo, or comparator agent, as the case may be, including quality assurance and stability testing, characterization testing, quality
control release testing of drug substance and drug product, quality assurance batch record review and release of product, process
development, qualification, and validation, scale-up, pre-clinical, clinical, and commercial manufacture and analytic development,
and product characterization.

1.10    “Manufacturing Expenses” means all expenses incurred in accordance with the Accounting Standards, directly or
indirectly,  in  connection  with  Manufacturing  a  pharmaceutical  product,  including  without  limitation  the  costs  incurred  for  all
materials (including devices sold as part of a Product for a single sales price, or included as part of a Product under Development),
labor, access and use of a portion of a Manufacturing facility, reasonably allocable Manufacturing overhead and out-of-pocket costs
paid to Third Parties, in each case including all FTE Expenses for FTEs who perform activities in furtherance of the foregoing, but
in  any  event  excluding  any  unreserved,  allocated  idle  capacity  costs  and  charges  that  exceed  in  the  aggregate  [*  *  *]  of  a
manufacturing facility relating to or occasioned by unused manufacturing capacity not otherwise committed to Products.

1.11        “Mapped  Target”  means  a  Collaboration  Target  for  which  design  and  generation  of  [*  *  *]  or  more  distinct
Compounds  Directed  To  such  Target  has  occurred  and  that  such  Compounds  Directed  To  such  Target  induce  an  inhibition,
disruption or modulation of Target-derived mRNA resulting in reduced expression of the Target-derived mRNA.

1.12        “Marketing  Authorization”  means,  collectively,  all  Regulatory  Approvals  (including  any  applicable  pricing,
reimbursement  or  access  approvals)  from  the  relevant  Regulatory  Authority  (including  FDA  and  EMA)  necessary  to  initiate
marketing and selling a Product in such country or jurisdiction.

1.13        “Marketing  Expenses”  means  all  expenses  incurred  in  accordance  with  the  Accounting  Standards,  directly  or
indirectly,  in  connection  with  the  marketing,  promotion  and  advertising  of  Products,  including,  without  limitation,  expenses  for
preparing  and  reproducing  detailing  aids,  promotional  materials,  expenses  of  professional  education,  product  related  public
relations,  relationships  with  opinion  leaders  and  professional  societies,  market  research  and  market  studies  (before  and  after
Regulatory Approval), healthcare economics studies, promotional events, attendance of professional conferences and trade shows,
and  other  similar  activities  directly  related  to  the  Products,  in  each  case  including  all  FTE  Expenses  for  FTEs  who  perform
activities in furtherance of the foregoing.

1.14    “Net Sales” [* * *]: 

1.15       “New  Chemical  Entity  Regulatory  Exclusivity”  means  the  exclusivity  granted  to  a  drug  that  contains  no  active
moiety that has been previously approved by FDA under Section 505(b) of the FFDCA (or any successor statutory provision or
treaty  that  provides  for  an  extension  of  such  exclusivity)  or  equivalent  exclusivity  in  countries  outside  the  United  States,  which
exclusivity shall be deemed, for purposes of Section 8.6.2(b), not to extend beyond [* * *] following the grant of such exclusivity
for the applicable Product in the applicable country.

15

1.16    “Notice of Dispute” has the meaning set forth in Section 19.6.1.

1.17    “Novo Background IP” has the meaning set forth in Section 10.3.

1.18     “Novo Competitor” means [* * *].

1.19    “Novo Indemnified Party” has the meaning set forth in Section 17.1.

1.20    “Novo Intellectual Property” means, individually or collectively, Novo Background IP, Novo Product Inventions,

Novo Patents and Novo Know-How.

1.21    “Novo Know-How” means any and all Know-How Controlled by Novo (or one of its Affiliates) that is: (a) existing
as  of  the  Signing  Date  or  generated  or  acquired  outside  the  scope  of  the  R&D  Program  and  this  Agreement,  including  any
Improvements  to  any  of  the  foregoing  that  is  necessary  or  reasonably  useful  for  the  Research,  Development,  registration,
Manufacture  (including  formulation),  use  or  Commercialization  of  a  Product  in  the  Field;  or  (b)  conceived,  Developed,  created,
made or reduced to practice in the course of performing the R&D Program during the Term, subject to Section 10.4, but including
Novo’s rights in any Joint Know-How.

1.22    “Novo’s Own Target” means any Collaboration Target which Novo has identified, and for which it has generated
Confidential Information or has independently conducted research or development, prior to the Signing Date or during the R&D
Collaboration Term and prior to its designation as a Collaboration Target.

1.23    “Novo Patents” means any and all Patent Rights Controlled by Novo and its Affiliates that are: (a) existing as of the
Signing Date or generated or acquired outside the scope of the R&D Program and this Agreement, including any improvements to
any  of  the  foregoing  that  is  necessary  or  reasonably  useful  for  the  Research,  Development,  registration,  Manufacture  (including
formulation), use or Commercialization of a Product in the Field; or (b) directed to Know-How described in subclause (b) of the
definition  of  “Novo  Know-How,”  subject  to  Section 10.4,  but  including  Novo’s  rights  in  any  Joint  Patent  Rights.  Novo  Patents
shall be disclosed in writing, which disclosures shall be updated from time to time, in accordance with Section 10.1.

1.24    “Novo Product Inventions” means any Invention discovered or conceived during the Term solely by or on behalf of
Novo  or  Affiliates  of  Novo  (and  not  by  Dicerna,  its  Affiliates  or  sublicensees)  arising  in  connection  with  the  Research  Plan,
Development Plan or any other activities in connection with the R&D Program or this Agreement, that is Directed To a Compound,
Product, or Collaboration Target(s). For the avoidance of doubt, Novo Product Inventions do not include any Dicerna Background
IP (including GalXC Platform IP), any Product-Specific Patents owned solely or jointly by Dicerna or any and Product-Specific
Know-How owned solely or jointly by Dicerna.

1.25    “Novo Product Patent” means any Patent Right Covering a Novo Product Invention.

1.26    “Novo Review Period” has the meaning set forth in Section 2.1.4.

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1.27    “Orphan Liver Indication” means an indication for use of a drug to treat a rare disease or condition of the liver
where  the  number  of  people  affected  by  the  disease  or  condition  is  less  than  200,000  persons  or  where  the  indication  for  use
otherwise meets the criteria for orphan drug designation under section 526(a) of the FFDCA and 21 C.F.R. 316.21.

1.28    “Party Specific Regulations” means all judgments, decrees, orders or similar decisions issued by any Governmental
Authority specific to a Party, and all consent decrees, corporate integrity agreements, or other agreements or undertakings of any
kind by a Party with any Governmental Authority, in each case as the same may be in effect from time to time and applicable to a
Party’s activities contemplated by this Agreement.

1.29    “Patent Expenses” means any expenses incurred by either Party in connection with the drafting, filing, prosecution,

maintenance, enforcement or defense of Patent Rights under Article 10.

1.30    “Patent Rights” means the rights and interests in and to issued patents and pending patent applications (which, for
purposes of this Agreement, include certificates of invention, applications for certificates of invention and priority rights) in any
country  or  region  where  filed,  including  all  provisional  applications,  substitutions,  continuations,  supplementary  protection
certificates,  continuations-in-part,  continued  prosecution  applications  including  requests  for  continued  examination,  divisional
applications  and  renewals,  and  all  letters  patent  or  certificates  of  invention  granted  thereon,  and  all  reissues,  reexaminations,
extensions  (including  pediatric  exclusivity  patent  extensions),  term  restorations,  renewals,  substitutions,  confirmations,
registrations,  revalidations,  revisions  and  additions  of  or  to  any  of  the  foregoing,  and  all  foreign  counterparts  of  any  of  the
foregoing.

1.31    “Patent Working Group” has the meaning set forth in Section 6.4.

1.32    “Payee” has the meaning set forth in Section 9.4.1.

1.33    “Payor” has the meaning set forth in Section 9.4.1.

1.34    “Permitted Subcontractors” has the meaning set forth in Section 4.8.

1.35        “Person”  means  any  individual,  corporation,  partnership,  association,  joint-stock  company,  trust,  unincorporated

organization or government or political subdivision thereof.

1.36        “Phase  1  Clinical  Trial”  means  a  clinical  trial  of  a  Product  generally  consistent  with  21  C.F.R.  §312.21(a)  or
equivalent trial outside of the United States, or a phase 1/2 clinical trial where a subsequent Phase 2 Clinical Trial will be required.

1.37          “Phase  2  Clinical  Trial”  means  a  clinical  trial  of  a  Product  generally  consistent  with  21  C.F.R.  §312.21(b)  or

equivalent trial outside of the United States.

1.38        “Phase  3  Clinical  Trial”  means  a  clinical  trial  of  a  Product  generally  consistent  with  21  C.F.R.  §312.21(c)  or

equivalent trial outside of the United States.

17

1.39    “Pivotal Study” means a human clinical trial that demonstrates the statistical efficacy and safety of a Product and
that is the final stage of clinical testing prior to and in support of the filing of an NDA or MAA for a Marketing Authorization,
whether constituting a Phase 2 Clinical Trial or Phase 3 Clinical Trial in the United States or a similar trial in other jurisdictions.

1.40    “PMDA” means the Japanese Pharmaceutical and Medical Device Association and any successor thereto.

1.41    “Pre-Clinical Milestone Event” has the meaning set forth in Section 8.3.1.

1.42    “Pre-Clinical Milestone Payment” has the meaning set forth in Section 8.3.1.

1.43    “Pre-Reserved Targets” means the up to [* * *] Targets that have been or may be pre-cleared by the Gatekeeper
prior to the Effective  Date  and,  following  such  clearance,  will  be  reserved  for designation by Novo or the JSC as Collaboration
Targets hereunder following the Effective Date.

1.44    “Product” means any Compound formulated for use in the Field.

1.45    “Product-Specific Know-How” means Know-How directed to a Compound, Product, or Collaboration Target(s) but

not directed to the GalXC Platform.

1.46    “Product-Specific Patents” has the meaning set forth in Section 10.7.2.

1.47    “Program Inventions” has the meaning set forth in Section 10.5.1.

1.48    “Program Leader” has the meaning set forth in Section 6.2.

1.49    “Project Leader” has the meaning set forth in Section 6.1.

1.50    “Proof of Concept Study” means [* * *].

1.51    “Proof of Principle” means [* * *].

1.52    “R&D Collaboration Term” has the meaning set forth in Section 4.1.2.

1.53    “R&D Program” has the meaning set forth in Section 4.1.1.

1.54    “Records” has the meaning set forth in Section 4.6.1.

1.55    “Regulatory Approval” means, collectively, any and all approvals (including supplements, amendments, pre- and
post-approvals, pricing and reimbursement approvals), licenses, registrations or authorizations (including marketing and labeling
authorizations) of any Regulatory Authority that are necessary for the Research, Development, registration, Manufacture (including
formulation),  distribution,  importation,  exportation,  use,  and  Commercialization  of  a  pharmaceutical  product  (including  a
Compound or Product) in a given jurisdiction.

18

1.56        “Regulatory  Authority”  means  the  FDA  or  any  counterpart  of  the  FDA  outside  the  United  States,  or  other
Governmental  Authority  with  authority  over  the  Research,  Development,  registration,  Manufacture  (including  formulation),  and
Commercialization of a pharmaceutical product (including a Compound or Product), which may include the authority to grant the
required reimbursement and pricing approvals for such sale.

1.57    “Regulatory Documentation” has the meaning set forth in Section 16.1.6.

1.58        “Research”  means  all  activities  related  to  the  research,  identification,  generation,  formatting,  screening,  testing
(including in silico, in vitro,  ex  vivo  human  validation  systems  and  animal  models,  but  not  in  human  subjects),  stability  testing,
toxicology and formulation of Collaboration Targets or Compounds up until nomination as a Development Candidate. When used
as a verb, “to Research” and “Researching” means to engage or engaging in Research.

1.59    “Research Plan” has the meaning set forth in Section 4.1.4.

1.60     “Returned Compounds and Products” has the meaning set forth in Section 15.2.1.

1.61    “RNAi” means a double-stranded RNA molecule that silences or inhibits the expression of a Target.

1.62    “Roche” has the meaning set forth in Section 1.18.

1.63    “Roche Agreement” has the meaning set forth in Section 1.18.

1.64    “Royalty” has the meaning set forth in Section 8.6.1.

1.65    “Royalty Term” has the meaning set forth in Section 8.6.2.

1.66    “Sales Expenses” means all expenses incurred in accordance with the Accounting Standards, directly or indirectly, in
connection with the sales of Products, including pre-launch expenses, to all markets in the Territory including the managed care
market,  including  without  limitation  sales  operations,  account  managers,  district  managers,  regional  managers,  fleet,  travel  and
entertainment, supervision, training, sales meetings, and other sales expenses, in each case including all FTE Expenses for FTEs
who  perform  activities  in  furtherance  of  the  foregoing.  For  the  avoidance  of  doubt,  Sales  Expenses  will  include  the  start-up
expenses associated with a Party’s sales force, including recruiting, relocation and other similar expenses.

1.67    “Senior Representative” means, with respect to a Party, an executive officer of such Party having greater seniority
than such Party’s JSC representatives, which executive officer such Party designates for the escalation of a disagreement within the
JSC.

1.68    “Target” means: [* * *].

1.69    “Taxes” has the meaning set forth in Section 9.4.

1.70    “Term” has the meaning set forth in Section 14.1.

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1.71    “Territory” means all of the countries and territories in the world.

1.72    “Third Party” means any Person other than Novo or Dicerna or an Affiliate of Novo or Dicerna.

1.73    “United States” or “U.S.” means the United States of America and its territories and possessions.

1.74    “Upfront Payment” has the meaning set forth in Section 8.1.1.

1.75    “Valid Claim” means (a) a claim of an issued and unexpired patent that has not been (i) held permanently revoked,
unenforceable, unpatentable or invalid by a decision of a court or governmental body of competent jurisdiction, unappealable or
unappealed within the time allowed for appeal, (ii) disclaimed or rendered unenforceable through disclaimer or otherwise, or (iii)
abandoned,  or  (b)  a  pending  claim  of  a  pending  patent  application,  which  claim  does  not  remain  pending  later  than  the  [*  *  *]
anniversary  of  the  First  Commercial  Sale  of  the  relevant  Product,  and  has  not  been  abandoned  or  finally  rejected  without  the
possibility of appeal or refiling or without such appeal having been taken or refiling having been made within the applicable time
periods.

1.76    “Validated Target” has the meaning forth in Section 2.1.3.

1.77    “Validated Target Criteria” means [* * *].

1.78    “VAT” has the meaning set forth in Section 9.4.4.

1.79    “Working Group” has the meaning set forth in Section 6.4.

1.80    “Work Flow Plan” has the meaning set forth in Section 2.1.3.

2.    TARGET SELECTION AND VALIDATION

2.1    Target Selection, Validation, and Development Candidates.

2.1.1    Collaboration Targets. For the initial [* * *] period of the R&D Collaboration Term (“Initial  Discovery
Period”), the Parties will engage in a collaborative effort to identify approximately thirty (30) or more Hepatocyte Targets which
are  confirmed  available  through  the  Gatekeeper  process  described  in  Section  2.4  in  the  Field  that  the  Parties  wish  to  further
Research  and  Develop,  pursuant  to  the  R&D  Program  (such  Targets  individually  and  collectively  referred  to  as  “Collaboration
Targets”), provided that such time period will be extended for up to [* * *] additional [* * *] terms if Dicerna is materially delayed
with respect to generating at least [* * *] (or, if fewer, such number of Collaboration Targets designated by the Parties) Mapped
Targets per [* * *] period over the course of the Initial Discovery Period or if the Parties agree in writing that additional time is
needed  to  identify  Collaboration  Targets  and  Mapped  Targets  (the  Initial  Discovery  Period  plus  any  such  extensions,  the
“Discovery Period”). For  clarity,  if  Dicerna  generates  more  than  the  minimum  number  of  Mapped  Targets  in  any  such  [*  *  *]
period, such excess shall count toward the minimum for the subsequent [* * *] period(s). Any Hepatocyte Target to be

20

included  as  a  Collaboration  Target  will  be  subject  to  confirmation  of  its  availability  to  Novo  through  the  Gatekeeper  process
described in Section  2.4.  Notwithstanding  anything  else  in  this  Agreement,  the  Parties  agree  that  on  a  Collaboration  Target-by-
Collaboration Target basis, Dicerna’s Research obligations end on achievement of the Proof of Principle for a Compound Directed
To such Collaboration Target.

2.1.1    Mapped Targets. During the Discovery Period, on a per [* * *] basis, Dicerna will deliver Mapped Targets
for [* * *] or more Collaboration Targets selected by Novo or the JSC to be Mapped Targets. For the avoidance of doubt, once a
Collaboration Target becomes a Mapped Target, it is still considered to be a Collaboration Target.

2.1.2        Validated  Targets  and  Proof  of  Principle.  During  the  R&D  Collaboration  Period,  Dicerna  will  use
Commercially  Reasonable  Efforts  to  perform  Research  of  Compounds  and  Novo  will  use  Commercially  Reasonable  Efforts  to
conduct the Research activities it has agreed to undertake, both as set forth in Exhibit A (as may be amended by the JSC from time
to  time,  the  “Work Flow Plan”)  and  the  applicable  Research  Plans,  with  the  objective  for  the  JSC  to  nominate  at  least  [*  *  *]
“Validated Targets” achieving the applicable Validated Target Criteria, provided that Novo shall have the right to designate any
Collaboration Target as a Validated Target at any time in its discretion, whether or not such Collaboration Target has achieved the
applicable Validated Target Criteria. For the avoidance of doubt, the reference to [* * *] Validated Targets is not intended in any
way to limit or guarantee the total number of Collaboration Targets which may be designated as Validated Targets. Dicerna shall, as
determined  by  the  JSC,  engage  in  further  evaluation  and  testing  of  Collaboration  Targets,  Validated  Targets  and  Compounds,
including, but not limited to, evaluation and testing of in vivo efficacy, and evaluation and testing of preclinical pharmacology of
Compounds, in order to achieve Proof of Principle for at least [* * *] Compounds to the extent feasible. For the avoidance of doubt,
even  when  a  Collaboration  Target  is  nominated  as  a  Validated  Target  or  a  Compound  Directed  To  a  Collaboration  Target  has
achieved Proof of Principle, it is still considered a Collaboration Target. For clarity, Research results are inherently uncertain and
the Parties acknowledge that there is no assurance such results can be achieved.

2.1.1    Data Packages and Access to Tissue Samples. From time to time at the reasonable request of Novo, and in
any  case  promptly  upon  the  end  of  the  R&D  Collaboration  Term,  Dicerna  shall  promptly  provide  to  Novo  an  accurate  and
reasonably  detailed  copy  of  the  Data  Packages  for  each  Collaboration  Target,  which  Data  Packages  may  be  used  by  Novo  for
purposes  of  determining  whether  to  designate  a  Collaboration  Target  as  a  Validated  Target  and/  or  having  achieved  Proof  of
Principle. Following Dicerna’s provision of each Data Package for each Collaboration Target at the end of the R&D Collaboration
Term:  (i)  Novo  shall  review  such  Data  Package,  and  Novo  shall  notify  Dicerna,  no  later  than  [*  *  *]  after  receiving  such  Data
Package, of any reasonable requests for additional information and records for the applicable Collaboration Target that is within
Dicerna’s possession and control, and Dicerna shall respond to such requests within [* * *] thereof; and (ii) Novo shall have at least
[*  *  *]  following  the  receipt  of  such  Data  Package  or  additional  information  and  records  to  decide  whether  to  designate  the
applicable Collaboration Target as a Validated Target and/ or having achieved Proof of Principle, provided that such [* * *] time
period shall be extended by the number of Calendar Days equal to the number of Calendar Days after such [* * *] period during
which Dicerna failed to provide such reasonably

21

requested  additional  information,  if  any  (each  such  time  period  following  receipt  of  a  Data  Package  at  the  end  of  the  R&D
Collaboration Term, a “Novo Review Period”). Further, as agreed in the applicable Research Plan, Dicerna shall, in the conduct of
pharmacology  studies  during  the  R&D  Collaboration  Term  and  as  reasonably  requested  by  Novo,  provide  to  Novo  at  Novo’s
expense for shipping thereof reasonable samples, such as blood and certain organs (e.g. liver, testes and accessory sex glands) for
early safety assessment of the relevant Compounds.

2.2        Development  Candidates.  During  the  R&D  Collaboration  Term,  the  JSC  or  Novo  may  nominate  one  or  more
Compound(s)  Directed  To  one  or  more  Validated  Target(s)  (each  a  “Development  Candidate”  or  “DC”)  which  have  achieved
Proof of Principle. If more than [* * *] DCs are nominated, it shall be deemed an increase in the scope of the Agreement and any
DCs in excess of [* * *] shall be subject to the additional payment requirements set forth in Section 8.3.2. For  the  avoidance  of
doubt, either the JSC or Novo, in its discretion, is free to cause such increase in scope. From time to time at the reasonable request
of Novo, and in any case promptly upon the end of the R&D Collaboration Term, Dicerna shall promptly provide to Novo a report
including all material data generated by Dicerna regarding Validated Targets and such other information reasonably requested by
Novo regarding evaluation and testing of Compounds Directed To one or more Validated Targets. Following Dicerna’s provision of
such report at the end of the R&D Collaboration Term: (i) Novo shall review such report, and Novo shall notify Dicerna, no later
than [* * *] after receiving such report, of any reasonable requests for additional information and records related to Compounds
that is within Dicerna’s possession or control, and Dicerna shall respond to such requests within [* * *] thereof; and (ii) Novo shall
have at least [* * *] following the receipt of such report to decide whether to nominate any Development Candidates, provided that
such [* * *] time period shall be extended by the number of Calendar Days equal to the number of [* * *] after such [* * *] period
during which Dicerna failed to provide such reasonably requested additional information, if any. Novo shall have final decision on
the selection and prioritization  for  further  testing  of  Development  Candidates. The Parties shall collaborate in the conduct of all
Research  activities  to  DC  nomination  as  specified  in  the  Research  Plans  and  Work  Flow  Plan,  leveraging  the  capabilities  and
expertise of each Party.

2.2.1    IND Activities. For each DC, Novo will lead IND-enabling and clinical development activities to IND filing,
except for the first DC, for which Dicerna will lead all activities to IND filing at Novo’s expense after achievement of Proof of
Principle,  provided  that  the  JSC  shall  establish  a  Working  Group  consisting  of  [*  *  *]  representatives  from  each  Party  through
which Dicerna will regularly inform Novo regarding the progress of activities prior to IND filing and through which Novo shall be
able  to  provide  reasonable  feedback  and  guidance  to  Dicerna.  Dicerna  shall  reasonably  consider  and  the  Parties  will  mutually
implement all such feedback and guidance. During the period when Dicerna is entitled to exercise its co-development options under
Section 2.3.3, on a DC-by-DC basis, within [* * *] of the end of each Calendar Year and until expiration of such co-development
option, Novo will submit a report to the JSC (and send a copy to Dicerna) for its Development Expenses.

2.2.2    Development Budget and Development Plan. On a DC-by-DC basis, prior to the first dosing of the first
patient in the first Clinical Trial, the Parties will also negotiate in good faith (and submit to the JSC) a Development Budget and
Development Plan for Development

22

activities to be performed by Dicerna. If the Parties cannot agree upon a Development Budget or a Development Plan, each Party
will  submit  a  separate  report  to  the  JSC  of  a  proposed  Development  Budget  or  Development  Plan  for  the  DC  and  the  JSC  will
determine a Development Budget or Development Plan. If the JSC is unable to agree on a Development Budget or Development
Plan, the Parties shall escalate the issue to Senior Representatives of each Party for resolution. If such Senior Representatives have
not succeeded in agreeing upon a Development Budget and Development Plan within [* * *], Novo shall be free to perform or have
performed such IND-enabling and clinical development activities without Dicerna’s involvement.

2.3    Reserved and Option Targets.

2.3.1        Dicerna  Targets.  Dicerna  represents  and  warrants  that  the  identity  of  the  Blocked  Targets  which  are  the
subject  of  Dicerna  Excluded  Programs  as  of  the  Signing  Date  are  as  set  forth  in  the  letter  dated  as  of  November  14,  2019  from
Dicerna to Novo listing the Blocked Targets that are the subject of the Dicerna Excluded Programs.

2.3.2    Dicerna Orphan Liver Target Reservation. At any time during the R&D Collaboration Term, Dicerna shall
have  the  option  to  designate  up  to  [*  *  *]  Targets  that  are  not  designated  as  Collaboration  Targets  for  worldwide  research,
development, and commercialization of GalXC Molecules, in each case that is relevant for the treatment of a single Orphan Liver
Indication (which can be worldwide) and provided that such Orphan Liver Indication (which can be worldwide) is the sole disease
for  which  Dicerna  intends  to  research,  develop  and  commercialize  GalXC  Molecules  (“Dicerna  Reserved  Orphan  Liver
Target”).  Before  Dicerna  (by  itself  or  with  any  Third  Party)  or  its  Affiliates,  or  any  Third  Party  authorized  by  Dicerna  or  its
Affiliates, initiates research, development or commercialization of a proposed Dicerna Reserved Orphan Liver Target, Dicerna shall
notify Novo in writing of its intention to designate a Target as a Dicerna Reserved Orphan Liver Target and of the Orphan Liver
Indication for the proposed Dicerna Reserved Orphan Liver Target and provide Novo sufficient documentation for Novo to assess
whether such Orphan Liver Indication is validly proposed as an Orphan Liver Indication for which the proposed Dicerna Reserved
Orphan Liver Target could be relevant.

(a)        After  such  notification  and  provision  of  documentation,  Novo  shall  have  [*  *  *]  to  notify
Dicerna that it either (i) challenges the status of such proposed Dicerna Reserved Orphan Liver Target as one for
which there is an Orphan Liver Indication for which Dicerna intends to research, develop and commercialize GalXC
Molecules, or (ii) designates the proposed Dicerna Reserved Orphan Liver Target as a Collaboration Target.

(b)        If  Novo  does  not  provide  any  such  notice:  (i)  the  proposed  Target  shall  become  a  Dicerna
Reserved Orphan Liver Target which Dicerna can Develop and Commercialize for the Orphan Liver Indication; (ii)
subject  to  Section  3.3,  the  Dicerna  Reserved  Orphan  Liver  Target  shall  be  reserved  exclusively  to  Dicerna
worldwide and will be promptly reported to the Gatekeeper pursuant to Section 2.4; and (iii) Dicerna shall have the
sole  and  final  decision  at  its  sole  expense,  subject  to  Novo’s  subsequent  option  set  forth  in  Section 3.3,  as  to  the
selection and

23

prioritization of Research activities for each GalXC Molecule Directed To a Dicerna Reserved Orphan Liver Target.

(c)        If  Novo  designates  the  proposed  Dicerna  Reserved  Orphan  Liver  Target  as  a  Collaboration
Target  as  contemplated  in  Section  2.3.2(a)(ii)  above,  the  proposed  Dicerna  Reserved  Orphan  Liver  Target  will
become a Collaboration Target and automatically be eligible for designation by Dicerna as a Co-Development Target
for  co-promotion  for  the  same  percentage  of  details  as  its  designated  Co-Development  Percentage,  subject  to
Dicerna’s  written  notification  to  Novo  specifying  a  Co-Development  Percentage  in  accordance  with  Section  1.30
provided  within  [*  *  *]  of  Novo’s  designation.  Promptly after Dicerna designates the proposed Dicerna Reserved
Orphan Liver Target as a Co-Development Product, the Parties shall negotiate in good faith and enter into a written
agreement  for  co-promotion  setting  forth  the  terms  of  Dicerna’s  and  Novo’s  rights  and  obligations  with  regard  to
such co-promotion in accordance with Exhibit G and the terms and conditions in this Agreement. This election by
Dicerna shall be in addition to Dicerna’s rights to designate two Co-Development Products in Section 2.3.3.

(d)    If Novo challenges the status of such proposed Dicerna Reserved Orphan Liver Target as one for
which an Orphan Liver Indication is the sole disease in the Field for which the proposed Dicerna Reserved Orphan
Liver Target could be relevant in accordance with the foregoing Section 2.3.2(a)(i), such dispute shall be resolved in
accordance  with  the  procedures  set  forth  in  Section  19.5.  If  such  dispute  resolution  procedures  result  in  a
determination  that  the  proposed  Orphan  Liver  Indication  was  validly  proposed  by  Dicerna,  Section 2.3.2(b)  shall
apply  (inclusive  of  Novo’s  ongoing  option  under  Section  3.3)  as  if  Novo  never  provided  notice  challenging  the
designation.  If  such  dispute  resolution  procedures  result  in  a  determination  that  the  proposed  Dicerna  Reserved
Orphan Liver Target was not validly proposed by Dicerna, such proposed Target shall remain a Target available for
designation as a Collaboration Target hereunder.

(e)    If Dicerna is researching, developing and commercializing a compound or product Directed To a
Dicerna Reserved Orphan Liver Target under Section 2.3.2(b), and if there is any indication other than an Orphan
Liver  Indication  that  is  relevant  for  the  Dicerna  Reserved  Orphan  Liver  Target,  then  neither  Dicerna  nor  its
Affiliates,  licensees  and  transferees  shall,  unless  otherwise  agreed  to  in  writing  by  Novo  in  its  sole  discretion,
Research,  Develop  or  Commercialize  any  compound  or  product  Directed  To  the  Dicerna  Reserved  Orphan  Liver
Target  for  such  other  non-Orphan  Liver  Indication.  In  such  event,  Dicerna  shall  notify  Novo  and  the  Parties  will
discuss research, development and commercialization of such non-Orphan Liver Indication and consider adding it to
the Agreement as a Collaboration Target and Co-Development Target.

2.3.3    Dicerna Options for Co-Development and Co-Promotion.

24

(a)        During  the  R&D  Collaboration  Term  of  this  Agreement,  Dicerna  shall  have  an  option  to
designate a total of [* * *] Products as Co-Development Products that, upon such designation, will become subject
to Section 5.4. For purposes of clarity, any such designation shall apply to all indications for the applicable Product.
Dicerna has an option to select [* * *] Product as a Co-Development Product upon availability of top-line data from
the first Phase 1 Clinical Trial (referred to in this Section 2.3.3 as “completion” of the first Phase 1 Clinical Trial) for
such  Product  and  one  (1)  Product  as  a  Co-Development  Product  upon  availability  of  top-line  data  from  the  first
Phase 2 Clinical Trial (referred to in this Section 2.3.3 as “completion” of a Phase 2 Clinical Trial) for such Product,
in each case provided that Dicerna exercises such option within the time period specified in Section 2.3.3(b) below.
For purposes of clarity, the first Product chosen by Dicerna as a Co-Development Product may be designated as such
upon either such completion, but the second Product chosen by Dicerna as a Co-Development Product may only be
designated as such at the point in time not used by Dicerna to choose the [* * *] Product (i.e., [* * *] Product may
be  designated  as  a  Co-Development  Product  following  completion  of  the  first  Phase  1  Clinical  Trial  and  [*  *  *]
Product  may  be  designated  as  a  Co-Development  Product  upon  completion  of  the  first  Phase  2  Clinical  Trial).
During the R&D Collaboration Term, for each Product, Novo will deliver to Dicerna within [* * *] of completion of
the first Phase 1 Clinical Trial and the first Phase 2 Clinical Trial, in each case only if Dicerna retains a designation
option at such point in time: (a) a reasonably detailed and complete report and analysis of the Phase 1 Clinical Trial
or Phase 2 Clinical Trial, as applicable; and (b) a proposed budget detailing projected expenses for the remainder of
the  Development  of  such  Product  through  the  first  Marketing  Authorization  thereof  in  the  first  Major  Territory.
Dicerna may select such Product as a Co-Development Product until [* * *] from Dicerna’s receipt from Novo of
the foregoing by providing a written notice stating that it wishes to designate such Product as a Co-Development
Product and specifying a Co-Development Percentage in accordance with Section 1.30.

(b)    If Dicerna exercises its option to designate a Co-Development Product, then Dicerna also shall
have the option to co-promote the Co-Development Product in the United States for the same percentage of details
as  its  designated  Co-Development  Percentage.  Approximately  [*  *  *]  before  the  anticipated  filing  of  the  first
Marketing  Authorization  for  a  given  Co-Development  Product,  Novo  shall  deliver  and  discuss  with  the  JSC  the
applicable  Commercialization  Plan.  In  addition  to  information  received  through  the  JSC,  Dicerna  may  submit
written questions to Novo about the Commercialization Plan for such Co-Development Product within [* * *] of the
receipt of such information, in which case Novo will respond to such questions no later than [* * *] from receipt of
Dicerna’s questions. Dicerna may exercise its option by giving written notice thereof to Novo no later than [* * *]
following  Novo’s  delivery  to  the  JSC  of  the  applicable  Commercialization  Plan.  If  Dicerna  fails  to  provide  such
written  notice  within  such  time  period,  Dicerna’s  option  is  of  no  further  force  or  effect.  Promptly  after  Dicerna
exercises a co-promotion option for a Co-Development Product, the Parties shall negotiate in good faith and

25

enter  into  a  written  agreement  for  co-promotion  setting  forth  the  terms  of  Dicerna’s  and  Novo’s  rights  and
obligations  with  regard  to  such  co-promotion  in  accordance  with  Exhibit  G  and  the  terms  and  conditions  in  this
Agreement.  For  the  avoidance  of  doubt,  the  contents  of  each  Commercialization  Plan  for  each  Co-Development
Product designated by Dicerna, and any amendments to each such Commercialization Plan, are at all times within
the  sole  discretion  of  Novo,  and  neither  the  JSC  nor  Dicerna  has  any  right  to  approve  or  amend  any  such
Commercialization Plan, regardless of whether Dicerna exercises its option to co-promote.

2.3.4    Continuation Targets. During the R&D Collaboration Term, Novo may provide written notice to the JSC
and  Dicerna  designating  up  to  [*  *  *]  Targets  among  the  Collaboration  Targets  (including  Validated  Targets)  as  “Continuation
Targets” which will remain available to Novo and subject to the exclusivity provisions of Sections 3.1 and 3.2 for a period ending
on the earlier of [* * *] after the completion of the R&D Collaboration Term or [* * *] after the Effective Date. For the avoidance
of doubt, once a Collaboration Target is designated as a Continuation Target, it is still considered a Collaboration Target subject to
this Section 2.3.4.

2.3.5    Discontinued Targets. On a Collaboration Target-by-Collaboration Target basis, upon the later of the end of
all Novo Review Periods or the end of the R&D Collaboration Term, the remaining Collaboration Targets that are not (i) Validated
Targets for which a Development Candidate has been nominated or (ii) Continuation Targets, shall become Discontinued Targets,
subject to Section 15.2. At the end of the period ending on the earlier of [* * *] after the completion of the R&D Collaboration
Term or [* * *] after the Effective Date, any Continuation Target for which a Development Candidate has not been nominated shall
become a Discontinued Target.

2.4    Gatekeeper Process.

2.4.1    Gatekeeper. The Parties have agreed to use an independent attorney to act as an information gatekeeper (the
“Gatekeeper”)  through  which  Novo  may  directly  inquire  as  to  whether  any  Target  that  Novo  intends  to  designate  as  a
Collaboration Target (whether pursuant to Section 2.1 or Section 2.4) is a Blocked Target at that time; Dicerna may inquire as to
whether any Hepatocyte Target is available to be a Dicerna Reserved Orphan Liver Target or a Blocked Target pursuant to Section
1.18(iv) and Dicerna’s third party partners (i.e., Alexion, Lilly, Roche and BI) may inquire as to whether any Target is available to
be  designated  as  a  Blocked  Target  at  that  time.  Dicerna  and  Novo  will  cause  the  Gatekeeper  to  enter  into  a  customary
confidentiality agreement that includes confidentiality obligations at least as stringent as the provisions set forth in Article 10 and
prohibits the Gatekeeper from disclosing to Novo the Blocked Targets List or from disclosing to either Dicerna or Novo the identity
of a Target that was the subject of any inquiry by the other Party. Nothing in this Section 2.4.1 will preclude Novo from contacting
Dicerna  directly  regarding  the  availability  of  Targets  or  otherwise,  to  which  Dicerna  will  respond  in  its  discretion,  or  preclude
Dicerna from contacting Novo directly regarding whether a particular Target is a Collaboration Target. The initial Gatekeeper will
be  [*  *  *],  whom  the  Parties  have  acknowledged  and  agreed  is  independent  and  which  law  firm  shall  enter  into  an  agreement
regarding the continued independence

26

of  such  Gatekeeper.  As  of  the  Effective  Date,  the  Gatekeeper  has  confirmed  and  reserved  certain  Pre-Reserved  Targets  for
designation as Collaboration Targets hereunder.

2.4.2    Gatekeeper Procedures. At  the  Signing  Date  Dicerna  shall  provide  to  the  Gatekeeper  the  list  of  Blocked
Targets for the Dicerna Excluded Programs and from time to time thereafter (including at least [* * *], including in response to
inquiries  hereunder),  (a)  Dicerna  will  provide  the  Gatekeeper  with  a  current  list  adding  up  to  [*  *  *]  Dicerna  Reserved  Orphan
Liver Targets which shall be Blocked Targets (where it is understood that [* * *] such Targets is all Dicerna may designate during
the R&D Collaboration Term pursuant to this Agreement) (the “Blocked Target List”),  and  (b)  Novo  will  be  entitled,  acting  in
good  faith  as  reasonably  necessary  to  identify  Hepatocyte  Targets  as  permitted  under  Section  2.1.1,  to  submit  inquiries  to  the
Gatekeeper  as  to  whether  or  not  a  proposed  Target  is  a  Blocked  Target.  Upon  receipt  of  an  inquiry,  the  Gatekeeper  will  notify
Dicerna  of  such  inquiry  by  Novo  without  disclosing  the  proposed  Target,  after  which  Dicerna  will  have  [*  *  *]  to  provide  the
Gatekeeper with any updates on requests made to Dicerna for reservations, substitutions or eliminations to the Blocked Target List
with supporting evidence of such changes having been requested in writing prior to the Novo inquiry. The Gatekeeper will inform
Novo  in  writing  whether  the  proposed  Target  is  a  Blocked  Target  within  [*  *  *]  of  receipt  of  the  associated  inquiry  and,  if  the
proposed Target is a Target as to which Dicerna can still grant rights to Novo, the Gatekeeper will inform Novo of the availability
of such Target and what rights Dicerna can grant and any associated restrictions. Upon the Effective Date, the Pre-Reserved Targets
will automatically be designated as Collaboration Targets and after the Effective Date upon notification of Novo by the Gatekeeper
of  availability,  each  subsequent  proposed  Target  will  be  automatically  designated  as  Collaboration  Targets.  If  the  Gatekeeper
notifies Novo in response to an inquiry (or Dicerna notifies Novo, in the case of direct contact between the Parties) that a proposed
Target is a Blocked Target, Novo will not have exhausted any of its rights to reserve or select Targets as a result of the inquiry, and
if the status of any Blocked Target changes and it is no longer a Blocked Target, Dicerna shall promptly notify the Gatekeeper; and
if such a change relates to a Target which was previously submitted by Novo and rejected by the Gatekeeper, the Gatekeeper shall
be under an obligation to notify Novo of such change as soon as practicable. Dicerna may from time to time inquire as to whether
any Hepatocyte Target with respect to which Dicerna intends to engage in activities that may be restricted under Sections 3.1 and
3.2 is a Collaboration Target. Upon receipt of such an inquiry from Dicerna, the Gatekeeper will inform Dicerna in writing whether
the proposed Target is a Collaboration Target within [* * *] of receipt of the associated inquiry.

2.5    Scope of Blocked Targets. [* * *].

2.6    Encumbered Targets [* * *].

3.    EXCLUSIVITY

3.1    Hepatocyte Target Exclusivity – [* * *]. [* * *], with respect to each Hepatocyte Target that is not a Blocked Target,
except as agreed in the Research Plan or as mutually agreed to by the Parties, Novo shall have exclusive and, as applicable, co-
exclusive worldwide rights to Research, Develop and Commercialize Compounds and Products in the Field, and Dicerna shall be
exclusive to and work exclusively with Novo on Researching, Developing or Commercializing Compounds or Products Directed
To any such Hepatocyte Target in the Field. In connection with

27

the  foregoing,  other  than  as  may  be  incidental  to  research  activities  for  Blocked  Targets,  and  except  as  may  be  permitted  under
Section  19.1  or  as  Dicerna  may  be  permitted  to  delegate  its  obligations  to  a  Permitted  Subcontractor  pursuant  to  Section  4.8,
Dicerna shall not (by itself nor with any Third Party) and shall cause its Affiliates not to (by themselves nor with any Third Party)
and shall not grant rights to any other Third Parties, carry out Research, Development or Commercialization, of any Hepatocyte
Target that is not a Blocked Target, nor sell, assign, transfer, convey, license, sublicense, covenant not to assert or otherwise grant or
transfer, to any Third Party (other than to an assignee pursuant to Section 19.1), any rights or immunities to or under any Licensed
Patent Rights to carry out any of the foregoing activities. In addition, during the [* * *], with respect to each Collaboration Target,
subject to Dicerna’s rights under Sections 2.3.2 and 2.3.3, Dicerna shall not enter into any agreement or take any action that would
adversely affect its ability to extend Novo the rights granted hereunder and otherwise perform should such Collaboration Target be
selected as a Validated Target.

3.2    Development Candidate and Product Exclusivity - Term of Agreement, During the Term of this Agreement, with
respect  to  each  Development  Candidate  or  Product,  except  as  agreed  in  the  Development  Plan  or  as  mutually  agreed  to  by  the
Parties  in  writing,  Novo  shall  have  exclusive  and,  as  applicable,  co-exclusive  worldwide  rights  to  Develop  and  Commercialize
Development  Candidates  and  Products  in  the  Field,  and  Dicerna  shall  be  exclusive  to  and  work  exclusively  with  Novo  on  the
Research,  Development  and  Commercialization  of  all  such  Development  Candidates  or  Products  Directed  To  a  Collaboration
Target  in  the  Field  while  Novo  is  researching  or  developing  any  Development  Candidates  or  Products  Directed  to  such
Collaboration  Target  and  Dicerna  shall  be  exclusive  to  and  work  exclusively  with  Novo  on  any  Commercialization  of  all  such
Development  Candidates  or  Products  Directed  to  a  Collaboration  Target  in  the  Field  while  Novo  is  commercializing  a
Development Candidate or Product Directed to such Collaboration Target. In connection with the foregoing, other than as may be
incidental to research activities for Third Party products not Directed To the applicable Collaboration Target, and except as may be
permitted under Section 19.1 or as Dicerna may be permitted to delegate its obligations to a Permitted Subcontractor pursuant to
Section 4.8, Dicerna shall not (by itself nor with any Third Party) and shall cause its Affiliates not to (by themselves nor with any
Third Party) and shall not grant rights to any other Third Parties, to (i) during such Development by Novo, carry out Development
or Commercialization, and (ii) during such Commercialization by Novo, carry out Commercialization in the case of each (i) and
(ii), of any compound, product, or therapy containing anything that binds to, or is intended to bind to, the same Validated Target in
the Field to which such Development Candidate or Product is Directed To, nor sell, assign, transfer, convey, license, sublicense,
covenant not to assert or otherwise grant or transfer, to any Third Party (other than to an assignee pursuant to Section 19.1), any
rights or immunities to or under any Licensed Patent Rights to carry out any of the foregoing activities.

3.3    [* * *].

3.4    Limited Novo Exclusivity. If during the Discovery Period, Novo wishes to Research, Develop or Commercialize, by
itself or any Affiliate or Third Party, any compound, product or therapy using siRNA conjugated to GalNAc that is Directed To a
Collaboration Target in the Field and Novo had not already commenced any such research prior to the Signing Date,

28

such Research, Development or Commercialization shall be done in collaboration with Dicerna under this Agreement and subject
to the confirmation of availability through the Gatekeeper process described in Section 2.5. Otherwise, nothing in this Agreement
shall restrict the ability of Novo or its Affiliates to research, develop or commercialize any compounds, products or therapies, it
being  understood  that  this  Section  3.4  shall  not  be  deemed  to  expand  the  scope  of  any  licenses  to  Licensed  Technology  or
ownership or Control of intellectual property granted hereunder.

3.5    Blocked Targets and Third Party Agreements. [* * *].

4.    RESEARCH AND PRODUCT DEVELOPMENT

4.1    Research and Development Program.

4.1.1        Purpose.  During  the  R&D  Collaboration  Term,  Dicerna  and  Novo  shall  engage  in  a  research  and
development  program  with  the  goal  of  Researching  and  Developing  one  or  more  Compounds  from  which  one  or  more
Development Candidates would be nominated by the JSC or Novo for further Development as Compounds or Products based on
the specified activities, timelines and criteria set forth in the Work Flow Plan and/or an applicable Research Plan or Development
Plan  (such  research  and  development  program,  the  “R&D  Program”).  Each  of  the  Parties  shall  expend  at  least  the  resources
specified in the Work Flow Plan in the performance of its Research and Development activities during R&D Collaboration Term.

4.1.2    R&D Collaboration Term. The R&D Program shall be conducted over a term commencing on the Effective
Date and continuing for a period of [* * *] thereafter (the “Initial R&D Collaboration Term”), provided that with respect to any
particular Collaboration Target that is the subject of active Development at the end of the Initial R&D Collaboration Term, the term
shall be extended for an additional [* * *] period(s) if Proof of Principle has not been achieved by the Parties on at least [* * *]
Compounds following designation of at least [* * *] Collaboration Targets and provided that such lack of achievement has not been
caused by Novo’s failure to perform its obligations under the Research Plan, if any, or if the Parties mutually agree in writing that
additional time is needed to complete Research and Development toward the nomination of Development Candidates (the Initial
R&D Collaboration Term plus any such extensions, the “R&D Collaboration Term”).

4.1.1        Work  Flow  Plan.  All  Research  and  Development  activities  of  each  Party  occurring  during  the  R&D
Collaboration Term and the timelines for all Collaboration Targets and Products therefor shall be set forth in the Work Flow Plan
set forth in Exhibit A attached hereto.

4.1.2        Research  and  Development  Plans.  All  Research  and  Development  activities  occurring  during  the  R&D
Collaboration  Term  and  the  timelines  and  budget  for  all  Collaboration  Targets  and  Products  therefor  shall  be  set  forth  in  one  or
more mutually agreed upon research plans (each, a “Research Plan”) or Development Plans, copies of which will be signed and
furnished  to  each  Party,  subject  to  Section  4.1.3,  as  may  be  amended  from  time  to  time  in  accordance  with  the  terms  of  this
Agreement.  Once  agreed  upon,  the  first  Research  Plan  hereunder  shall  be  attached  hereto  as  Exhibit  B.  For  clarity,  subject  to
Section 4.1.3, the budgets to be set forth in the Research Plan(s) shall be construed only as guidelines and shall not in any way limit
a

29

Party’s obligations to use Commercially Reasonable Efforts to perform all activities specified in the Research Plan, subject to the
rights of reimbursement and any limitations on responsibilities or their costs as expressly set forth in this Article 4. Each Target and
Compound shall have a separate Research Plan and Development Plan associated with it unless otherwise agreed to by the Parties
(e.g.  because  a  Target  is  dual  or  Targets  are  interdependent).  For  the  avoidance  of  doubt,  Novo’s  Research  and  Development
activities shall not be constrained by the contents of any Research Plan or Development Plan.

4.2    Research and Development Activities.

4.2.1        Activities  until  Achievement  of  Proof  of  Principle.  For  each  Validated  Target,  Dicerna  shall  use
Commercially Reasonable Efforts to conduct activities specified in the Research Plan directed toward the achievement of Proof of
Principle of a Compound Directed To that Validated Target Each Party is responsible for its own expenses in conducting activities
specified in the Research Plan and intended for achieving Proof of Principle, which in Dicerna’s case, may include rodent and non-
human primate studies before Proof of Principle but no other in vivo studies, unless otherwise discussed and agreed by the JSC.
Notwithstanding the foregoing, subject to Novo’s prior written approval regarding the costs thereof, Novo shall be responsible for
reimbursing reasonable, out-of-pocket costs paid by Dicerna to Third Party contract manufacturers for CMC Activities to support
animal studies that are reasonably necessary to achieve Proof of Principle.

4.2.2    Activities from DC Nomination through IND Submission. For the first Development Candidate nominated
by the JSC or Novo, Dicerna shall use Commercially Reasonable Efforts to conduct all activities specified in the Development Plan
that are not expressly indicated as being Novo’s responsibility in a manner reasonably requested by Novo toward the preparation
and submission of an IND for the Development Candidate with Novo having the sole obligation for payment of related expenses
after  nomination  as  a  Development  Candidate  for  the  applicable  Validated  Target,  provided  further  that  Novo  will  only  be
responsible  for  payment  of  expenses  incurred  in  accordance  with  a  Development  Budget  that  has  been  approved  in  writing  by
Novo,  including  Dicerna’s  Direct  Manufacturing  Costs  from  and  after  achievement  of  Proof  of  Principle  that  have  been  so
approved. Novo shall use Commercially Reasonable Efforts to perform such activities specified in the Development Plan that are
expressly indicated as Novo’s responsibility. For all subsequent Development Candidates nominated by the JSC, unless otherwise
agreed to by the Parties, Novo shall use Commercially Reasonable Efforts to conduct activities it deems reasonably appropriate in
furtherance of the preparation and submission of an IND for each subsequent Development Candidate.

4.3    Clinical Development Activities. Subject to Section 3.1, Novo shall use Commercially Reasonable Efforts to conduct
all Development activities from IND Approval through Commercialization on at least [* * *] Development Candidates, provided
that  at  least  [*  *  *]  Development  Candidates  are  selected  for  Development  Candidate  nomination.  If  more  than  [*  *  *]
Development Candidates are selected, then Novo shall, subject to the immediately preceding sentence, have the right to prioritize
its Development efforts among such Development Candidates.

30

4.1    Costs of Performance.

4.1.1    Responsibilities of Parties.

(a)        Except  as  otherwise  expressly  set  forth  in  this  Agreement  or  in  a  Research  Plan,  during  the
Term,  each  Party  shall  bear  its  expenses  conducting  Research  activities  until  nomination  as  a  Development
Candidate for a Compound Directed To a Validated Target.

(b)    [* * *].

(c)    [* * *].

(d)    Except as otherwise set forth in herein, unless the Parties mutually agree or subject to Sections
2.3.2,  2.3.3,  3.3  or  5.4,  [*  *  *]  will  not  bear  any  expenses  after  nomination  as  a  Development  Candidate  for  a
Compound  or  Product  and  [*  *  *]  shall  bear  all  other  expenses  incurred  under  this  Agreement,  including  for
Development and Commercialization, other than for a Co-Development Program.

4.1.2        Cost  Calculation  Mechanism.  Where  this  Agreement  expressly  requires  that  Novo  reimburse  or  be
responsible  for  Dicerna’s  expenses  incurred  under  a  Research  Plan  or  Development  Plan  or  otherwise  directed  by  Novo  under
Section 4.2.2, such expenses shall be calculated in accordance with the following mechanism: Novo shall compensate Dicerna for
FTEs performing activities under and in accordance with the Research Plan or Development Plan at the FTE Rate, provided that the
nature and scope of the work performed by Dicerna has been approved in advance in writing by Novo and that Dicerna uses at least
the same level of efforts and efficiency to perform such work as Dicerna uses for similar work performed for its own account (but
in no event less than Commercially Reasonable Efforts). For the avoidance of doubt, the FTE Rates are payable solely for activities
for  which  this  Agreement  expressly  specifies  that  Novo  is  to  reimburse  or  be  responsible  for  Dicerna’s  expenses  and  are  not
payable  for  any  other  activities  that  Dicerna  undertakes.  In  addition  to  the  FTE  Rates,  Novo  shall  reimburse  any  out  of  pocket
expenses  incurred  by  Dicerna  in  accordance  with  the  Research  Plan  or  Development  Plan  that  are  specified  as  being  Novo’s
responsibility. The compensation is to be paid by Novo to Dicerna on a [* * *] basis with respect to each [* * *]. Payment shall be
made in arrears and within [* * *] after receipt of an invoice, with supportive documentation detailing the FTE hours and out of
pocket expenses applicable to Dicerna’s efforts for such applicable [* * *] period, such information to include the work packages of
the  Development  Plan  items  worked  on  the  number  of  FTEs  assigned  to  each  work  package  and  the  out-of-pocket  expenses.
Notwithstanding  the  foregoing,  contract  research  organization  (“CRO”)  expenses  incurred  by  Dicerna  in  accordance  with  the
Development  Plan  shall  be  invoiced  separately  by  Dicerna  upon  Dicerna’s  receipt  of  such  CRO’s  invoice,  and  irrespective  of
whether such payments are made in advance or in arrears, such invoice to be due and payable within [* * *] upon receipt of such
invoice  by  Novo;  provided,  that,  if  Novo  reimburses  Dicerna  for  advance  payments  made  by  Dicerna  to  CROs,  Dicerna  shall
provide the final actual cost per invoiced period and a true up of actual cost compared to advance payment (planned cost) to Novo.
If the advance payment(s) turn out to be higher than the actual cost incurred by Dicerna,

31

Dicerna  shall  credit  the  respective  amount  of  the  advance  payment  to  the  next  invoice  or  invoices  payable  by  Novo,  and  in  the
event  there  are  no  further  invoices  anticipated,  reimburse  Novo  within  [*  *  *]  of  such  true  up.  As  long  as  Dicerna  provides
Development  support  to  Novo  and  for  a  period  of  [*  *  *]  thereafter,  Dicerna  shall  maintain  complete  and  accurate  books  and
records regarding the FTEs and all out-of-pocket expenses (including CRO expenses) invoiced to Novo and Novo shall have the
right to have an Accounting Firm inspect Dicerna’s records solely for purposes of determining the accuracy of the FTEs passed
through to Novo in accordance with Section 9.5 of this Agreement applied mutatis mutandis (subject only to replacing references to
“Novo” with references to “Dicerna,” and vice versa, and other analogous changes, including changes related to the subject matter
of  the  audit).  Unless  mutually  agreed  to  by  the  parties,  Dicerna  shall  invoice  Novo  for  such  expenses  according  to  the  Novo
Nordisk A/S Invoicing Instructions attached hereto as Exhibit C.

4.2    IND Filing. For all Products Developed and Commercialized under Section 4.2 or Section 4.3, [* * *], Novo shall be
responsible  for  the  preparation  and  submission  of  the  IND  filing  and  for  seeking  IND  Approval  and  shall  have  control  over  all
interactions  with  the  applicable  Regulatory  Authority.  [*  *  *],  the  Parties  shall  be  jointly  responsible  for  the  preparation  and
submission  of  the  IND  filing,  including  responses  to  any  questions  from  the  Regulatory  Authorities  during  review,  at  Novo’s
expense, but Novo will otherwise be responsible for seeking IND Approval and shall have control over all interactions with the
applicable  Regulatory  Authority.  Novo  shall  own  all  Regulatory  Approvals  and  be  responsible  for  all  decisions  in  connection
therewith for Regulatory Approvals of Products in the Field; provided, that Dicerna shall reasonably cooperate in these efforts as
reasonably requested by Novo at Novo’s expense.

4.3    Records, Reports and Audits.

4.3.1        Records  of  Activities  under  R&D  Program.  Dicerna  and  Novo  shall  maintain  complete,  current  and
accurate  records  (paper  and/or  electronic)  for  so  long  as  necessary  to  comply  with  Applicable  Laws,  or  reasonably  necessary  to
support  the  prosecution,  maintenance  and  enforcement  of  intellectual  property  rights  (including  Patent  Rights),  regarding  its
conduct of the R&D Program after the applicable activity, in sufficient detail and in good scientific manner appropriate for patent
and regulatory purposes, which shall fully and properly reflect the work done and results achieved by each Party in the performance
of the R&D Program; and sufficient to confirm the accuracy and contents of the Blocked Target List (the “Records”). Electronic
Records shall be stored by each Party in accordance with the system for electronic data storage and exchange specified by the JSC
(which specification the JSC shall agree upon during the first JSC meeting).

4.3.2        Prioritization  and  Resource  Allocation  Planning.  At  the  Effective  Date  and  at  least  [*  *  *]  thereafter,
Dicerna will present to the JSC for approval a proposed project prioritization and timeline for the next [* * *] period, including a
suggested allocation of FTE resources to each identified Collaboration Target; provided that, if the JSC is unable to agree on such
project prioritization, timeline and/or allocation of resources, including FTEs, such issue(s) shall be finally decided as set forth in
Section 19.6. Dicerna shall provide to Novo a draft of the above project prioritization and timeline at least [* * *] in advance of the
JSC meeting at which such project prioritization and timeline is to be discussed.

32

4.3.3    Resource Allocation. During the R&D Collaboration Term, Dicerna and Novo agree that each will assign to
the  Collaboration  Targets  resources  substantially  in  accordance  with  the  budgets  set  forth  in  the  Research  Plans,  including
appropriate personnel resources comprising skills and levels of experience consistent with such budgets set forth in the Work Flow
Plan.

4.3.4    Copies and Inspection of Records. [* * *].

4.4    Certain Standards Applicable to Work.

4.4.1    All Research and Development done by either Party for non-regulated work under this Agreement will be
conducted in accordance with the Research Plan or Development Plan, all applicable data privacy and security laws and regulations
and other Applicable Laws. [* * *].

4.4.2    [* * *]. [* * *]. Each Party represents and warrants that, during the R&D Collaboration Term, it shall adhere
to  and  comply  with  its  respective  obligations  related  to  the  use  of  [*  *  *]  set  forth  in  Exhibit  L  and  shall  use  Commercially
Reasonable Efforts to ensure that all future subcontractors and CROs adhere to and comply with these obligations. The decision to
use [* * *] in the activities to be conducted pursuant to the Research Plan or Development Plan shall be made by the JSC.

4.4.3    Use of Animals. The Parties agree to ensure high welfare standards for experimental animals used in any
activities  to  be  conducted  pursuant  to  the  Research  Plan  or  Development  Plan.  Dicerna  acknowledges  that  it  has  read  and
understood Novo’s Principles for the Use of Animals attached hereto as Exhibit M and agrees to adhere to and comply with these
obligations.  Dicerna  must  promptly  notify  Novo  in  the  event  of  any  material  unexpected  issues  in  relation  to  animal  welfare  or
bioethical  concerns  that  occur  under  the  Research  Plan  or  Development  Plan  and  Dicerna  must  report  to  Novo  the  number  of
experimental animals having been used by Dicerna under the Research Plan or Development Plan in a [* * *] within [* * *] after
the  end  of  such  [*  *  *].  The  Parties  agree  to  reasonably  collaborate  to  address  any  such  issues  and  concerns  to  the  extent  such
issues  and  concerns  relate  to  more  than  local  legal  requirements.  Dicerna  acknowledges  that  Novo  may  require  a  single  on-site
animal welfare inspection prior to initiation of the activities to be conducted pursuant to the Research Plan or Development Plan. If
Novo wishes to perform such animal welfare inspection during the R&D Collaboration Term, Dicerna shall give Novo access to the
relevant areas of its site upon reasonable notice of no less than [* * *]; provided, that any such audit shall comply with Dicerna’s
SPF protocols, shall not be conducted more than [* * *] (except in the event that an audit identifies any issues, in which case Novo
shall be permitted to undertake a follow-up audit) and shall be conducted during normal business hours and in a manner intended to
minimize any disruptions to Dicerna’s day-to-day business.

4.5    Right to Subcontract. Subject to the terms of this Section 4.8 and Section 5.1.2, each Party shall have the right to
engage permitted Third Party contractors working on its behalf (the “Permitted Subcontractors”) to perform such portions of its
Research  and  Development  obligations  under  this  Agreement  that  it  customarily  engages  for  its  other  similar  research  and
Development activities, except that: (a) any use of Permitted Subcontractors by Dicerna is subject

33

to the prior written approval of Novo, except for the contract manufacturers listed on Exhibit I; and (b) under no circumstance can
such Permitted Subcontractor be debarred or disqualified by a regulatory authority. Any Permitted Subcontractor to be engaged by
a  Party  to  perform  its  obligations  under  this  Agreement  shall  meet  the  qualifications  typically  required  by  such  Party  for  the
performance of work similar in scope and complexity to the subcontracted activities. Furthermore, notwithstanding the foregoing,
each Party shall be responsible for ensuring that, prior to engaging any Permitted Subcontractor that such Permitted Subcontractor
is  subject  to  written  agreements  containing  terms  and  conditions:  (i)  consistent  with  and  which  provides  a  substantially  similar
degree  of  protection  as  the  relevant  terms  and  conditions  of  this  Agreement  protecting  the  rights  of  the  Parties  under  this
Agreement  including  imposing  obligations  of  confidentiality  on  each  such  Permitted  Subcontractor;  (ii)  that  vests  ownership  in
such Party of any and all Inventions developed by such Permitted Subcontractor in the course of performing such subcontracted
work;  (iii)  that  does  not  under  any  circumstance  impose  any  payment  obligations  or  liability  on  the  other  Party,  and  (iv)  that  is
otherwise  consistent  with  the  terms  of  this  Agreement.  Dicerna  shall  obtain  the  right  for  Novo  to  once  annually  and  at  its  own
expense  to  audit  Permitted  Subcontractors  of  Dicerna  in  accordance  with  Section  4.6.4.  Each  Party  shall  remain  directly
responsible  for  all  of  its  obligations  under  this  Agreement  that  have  been  subcontracted  or  sublicensed  to  any  Permitted
Subcontractor.

5.    MANUFACTURING AND COMMERCIALIZATION

5.1    Compound and Product Manufacturing Generally.

5.1.1    Generally. Dicerna shall supply Compounds through nomination as a Development Candidate in accordance
with  Section  5.1.2,  either  itself  or  through  a  contract  manufacturer  disclosed  pursuant  to  Section  5.1.2.  Subject  to  the  Parties’
respective rights and obligations with respect to filing applications for and obtaining IND Approvals as set forth in Sections 4.2.2
and 4.5, Dicerna has the right to perform and manage the CMC Activities through IND Approval, and the obligation to do so, [* *
*]. On a Development Candidate-by-Development Candidate basis, the Parties, in consultation with the JSC, shall decide on the
transfer of responsibilities and obligations related to CMC. The Parties will specify in the relevant Research Plan or Development
Plan the source of manufacture and supply of all other pre-clinical and clinical Products. For the avoidance of doubt, unless the
Parties  mutually  agree  to  other  terms,  Dicerna  will  have  no  obligation  to  Manufacture  any  Compounds  or  Products  for  Clinical
Trials  and  will  not  be  responsible  for  any  Manufacturing  Expenses  after  nomination  as  a  Development  Candidate.  If  the  Parties
mutually  agree  that  Dicerna  will  supply  Products  for  Clinical  Trials,  the  Parties  will  negotiate  in  good  faith  a  future  Supply
Agreement for submission to the JSC for approval.

5.1.2    Manufacturing Standards. A list of the contract manufacturers that Dicerna has engaged with the ability to
Manufacture the Products for Research and Development until at least IND-submission (on a Product-by-Product basis) is attached
as Exhibit I, which contract manufacturers shall be considered Permitted Subcontractors in accordance with Section 4.8. Without
limiting the foregoing, but subject to the terms and conditions of this Agreement, the Parties will negotiate in good faith to come to
a mutual agreement related to Product supply by Dicerna under GMP during the R&D Collaboration Term for each Product up until
nomination as a Development Candidate and, with the respect the first Product that is the subject of an IND filing,

34

up  until  such  IND  filing;  it  being  understood  that  unless  the  Parties  agree  otherwise,  Dicerna  has  the  right  to  use  the  contract
manufacturers  in  Exhibit  I  to  fulfill  its  manufacturing  obligations.  The  Parties  shall  enter  into  a  quality  agreement  if  Novo
determines  that  such  an  agreement  is  relevant  to  the  conduct  of  manufacturing  activities.  When  Dicerna  uses  a  contract
manufacturer or other subcontracted element of the supply chain, Novo will have the right to audit such contract manufacturer and
to approve (or reject) in advance any new contract manufacturer that is not listed on Exhibit I, provided that such approval shall not
be unreasonably withheld, delayed or conditioned. The Parties agree that the manufacturers for each Product shall be listed in the
Research  Plan  or  Development  Plan.  Except  as  set  forth  in  this  Section  5.1.2,  Novo  shall  have  the  right  to  perform  or  have
performed Product manufacturing in its discretion.

5.1.1    Visits to Facilities. Novo may conduct ongoing and routine audits of Dicerna or its subcontractors (including
its contract manufacturers) in accordance with Section 4.6.4  (including  the  expense  reimbursement  provisions  thereof)  to  ensure
compliance with applicable GMPs and Exhibit M during normal business hours no more than once annually and upon reasonable
advance notice by Novo and the mutual agreement of the Parties as to the specific date and time for such audit, provided, however,
that in the case of audits for cause, Novo will have the right to conduct, or cause Dicerna to conduct, compliance audits more than
once annually at the time of the event giving rise to a for cause audit, upon at least [* * *] advance written notice, provided that
such audit does not unreasonably interfere with Dicerna’s operations. Dicerna shall ensure that all of its agreements with is contract
manufacturers and other subcontractors provide for Novo to directly conduct such audits.

5.1.1        Notice  of  Inspections.  If  legally  permissible,  Dicerna  shall  provide  notice  to  Novo  within  [*  *  *]  of
becoming aware of any requested or commenced governmental or regulatory review, audit or inspection of its or its contractor’s
facility, processes, Compounds or Products that directly relate to this Agreement. Dicerna shall provide Novo with the results of
any such review, audit or inspection and be given the opportunity to provide assistance in responding to any such review, audit or
inspection.

5.2    Product Quality Generally. An applicable quality agreement will determine, in accordance with applicable regulatory
requirements, all Product quality standards for Product to be used in Clinical Trials including: stability; process validation and pre-
approval inspection preparation; specifications; assay methodology and storage conditions. Novo will determine in accordance with
applicable Regulatory Requirements such Product quality standards that must be included in any manufacturing requirements for
Product  and  Novo  will  in  all  circumstances  have  the  sole  right  to  make  the  final  release  determinations  for  the  Products,  as  the
Parties shall set forth greater detail in the applicable quality agreement.

5.3        Commercialization by Novo. Subject  to  Sections  2.3.2,  2.3.3,  3.3  and  5.4,  Novo  shall  have  the  sole  right  and  be
responsible  for  Commercialization  of  the  Products  in  the  Territory,  and  shall  use  Commercially  Reasonable  Efforts  to  achieve  a
First Commercial Sale of at least [* * *] Products, provided that all necessary Regulatory Approvals are obtained.

5.4        Co-Development  Payments.  A  Co-Development  Program  will  not  be  subject  to  any  future  Development  and

Regulatory Milestone Payments, Commercial Milestone Payments or

35

Royalties  due  under  Sections  8.4,  8.5  and  8.6.  Upon  Dicerna’s  designation  of  a  Product  as  a  Co-Development  Product,  all
Development and Regulatory Milestone Payments and Commercial Milestone Payments previously paid by Novo to Dicerna with
respect to such Product and the relevant Collaboration Target shall constitute Pre-Option Development Expenses of Novo and be
subject to Section 5.4.2 below.

5.4.1        Budget.  On  a  Co-Development  Program-by-Co-Development  Program  basis,  and  as  further  detailed  in
Exhibit F,  the  Parties  will  promptly  agree  upon  a  budget  for  expected  Development  Expenses  for  the  Co-Development  Program
(“Co-Development  Budget”)  unless  the  Parties  have  already  agreed  upon  or  the  JSC  has  determined  a  Development  Budget,
which will be used to calculate the Co-Development Budget. [* * *].

5.4.2        Payment of Shared  Costs  and  Profits. Subject to Section  5.4.1  and  as  further  detailed  in  Exhibit  F,  the
designating Party will be responsible for: (i) paying the other Party for all Co-Development Pre-Option Expenses within [* * *] of
the  receipt  of  an  invoice  from  the  non-designating  Party  issued  on  or  after  the  designation  date;  and  (ii)  payment  of  Co-
Development  Post-Option  Expenses  as  they  are  incurred  for  a  given  Co-Development  Program  within  [*  *  *]  after  receipt  of  a
report of Co-Development Post-Option Expenses incurred by the other Party, which report shall be submitted following the end of
each [* * *] beginning with the [* * *] of opt-in. Each Party will be entitled to a respective percentage of Global Profits for the Co-
Development Product, with the designating Party receiving an amount equal to Co-Development Percentage multiplied by Global
Profits (“Co-Development Profit Share”) and the Party responsible for Commercialization activities receiving the remainder of
Global Profits, as further detailed in Exhibit F. In the event that actual Co-Development Post-Option Expenses for a [* * *] exceed
the Co-Development Budget in effect as of the first day of such [* * *] by more than [* * *]:

(a)    Dicerna may (but is not required to) elect, upon written notice to Novo delivered within [* * *]
of the date on which Novo notifies Dicerna of such budget excess, to continue to pay the budgeted Co-Development
Post-Option Expenses  and  adjust  the  future  Co-Development  Percentage  to  reflect the relative share paid by each
Party  of  the  Co-Development  Post-Option  Expenses  for  the  Product.  By  way  of  example,  if  (i)  Dicerna’s  Co-
Development Percentage is [* * *], (ii) in prior [* * *], the aggregate Co-Development Post-Option Expenses were
[* * *] (of which Dicerna paid [* * *]), (iii) the Co-Development Budget for the Product in the current [* * *] is $[*
* *] (of which Dicerna’s share would be ([* * *]), and (iv) FDA requires an additional arm be included in a Pivotal
Study and, as a result, the actual Co-Development Post-Option Expenses incurred during such [* * *] (including the
additional Co-Development Post-Option Expenses for such additional arm) totaled [* * *], Dicerna could elect to
pay only [* * *] (i.e., [* * *] of its budged share) and to decrease its Co-Development Percentage going forward to
[* * *] (calculated as [* * *] (i.e., the aggregate Co-Development Post-Option Expenses funded by Dicerna through
such [* * *])) divided by [* * *] (i.e., the total Co-Development Post-Option Expenses through such [* * *])). Once
Dicerna makes such an election, Dicerna may not thereafter increase its Co-Development Percentage; or

36

(b)    Dicerna may (but is not required to) elect, which election Dicerna may make only once during
the Term, upon written notice to Novo delivered within [* * *] of the date on which Novo notifies Dicerna of such
budget  excess,  to  defer  its  portion  of  such  excess  Co-Development  Post-Option  Expenses  over  [*  *  *]  of  the
budgeted  Co-Development  Budget  for  the  Product  in  the  current  [*  *  *],  with  the  amount  of  such  deferral  not  to
exceed a total [* * *]. For example, in the circumstances described in the example in Section 5.4.2(a) above, Dicerna
could  elect  to  defer  [*  *  *]  (i.e.,  [*  *  *]  of  the  portion  of  the  budget  excess  ([*  *  *])  over  [*  *  *]  of  the  Co-
Development Budget for the Product in the current Calendar Year). The deferred amount must be repaid within the
following [* * *] immediately subsequent [* * *] with an interest rate of [* * *].

5.4.3        Co-Development  Product  Payments.  Subject  to  this  Section  5.4,  with  respect  to  each  Co-Development
Product, Global Profits accrued during the Term shall be shared between the Parties according to the Co-Development Profit Share,
except as subject to Section 5.4.4. Within [* * *] after the end of each [* * *], the Party responsible for such Commercialization
shall  submit  a  report  to  the  other  Party,  including  a  calculation  of  Net  Sales  during  such  Calendar  Quarter,  a  breakdown  of  the
calculation  of  Global  Profits,  and  a  proposed  division  between  the  Parties,  including  the  calculation  of  Co-Development  Profit
Share,  in  accordance  with  Section  5.4.2.  Concurrently  with  the  submission  of  such  report,  the  Party  responsible  for  such
Commercialization shall make a payment to the other Party in an amount calculated according to the Co-Development Profit Share
included in such report; provided, however, that in the event such calculated payment amount is negative (including all previous
calculated payment amounts that were negative), the Party responsible for such Commercialization shall invoice the other Party for
such amount and the other Party shall pay on such invoice within [* * *] of the date thereof. In the event of any disagreement with
respect to the calculation of such payment, any undisputed portion of such payment shall be paid in accordance with the foregoing
timetable  and  the  remaining,  disputed  portion  shall  be  paid  within  [*  *  *]  after  the  date  on  which  the  Parties,  using  good  faith
efforts, resolve the dispute.

5.4.4    Failure to Pay and Early Termination. If a designating Party fails to make timely and complete payment of
the  Co-Development  Pre-Option  Expenses  or  any  Co-Development  Post-Option  Expenses,  the  other  Party  may  provide  written
notice of termination of the relevant Co-Development Program to the designating Party, which notice shall be effective [* * *] after
the date of the notice unless the failure to pay is cured within such time period. If a Co-Development Program is terminated, the
underlying Co-Development Target will become a Collaboration Target. In the event of any such termination with respect to a Co-
Development Program that had been designated by Dicerna, Dicerna shall not be eligible to receive any payments under Sections
8.2 or 8.3 with respect to any applicable Products. For the avoidance of doubt, no payments are due under Sections 8.2 or 8.3 with
respect to Co-Development Products.

6.    GOVERNANCE AND JOINT STEERING COMMITTEE

6.1    Project Leader. Within [* * *] after a Collaboration Target has been selected, Novo and Dicerna shall [* * *] to serve

as the primary point of contact between the Parties with respect

37

to each Collaboration Target being Researched and Developed under the R&D Program (each, a “Project Leader”). The  Project
Leaders  shall  regularly  communicate  with  each  other  to  address  R&D  Program-related  issues,  needs  and  updates  and  facilitate
communications and organization of Working Groups associated with each active Research Plan or Development Plan with respect
to each Target. Either Party, upon prior notice to the other Party, may change its Project Leader. Additionally, the Parties may assign
different  Project  Leaders  for  different  Projects.  Except  for  those  Disputes  that  are  subject  to  the  purview  of  the  JSC,  prior  to
submitting any Dispute to the Program Leaders or dispute resolution mechanism set forth in Section 19.6, the Project Leaders shall
attempt, for a period of [* * *], to resolve such Dispute.

6.2    Program Leader. Within [* * *] of the Effective Date, Novo and Dicerna shall [* * *] to serve as the primary point of
contact  between  the  Parties  with  respect  to  all  Collaboration  Targets  being  Researched  and  Developed  under  the  R&D  Program
(each,  a  “Program  Leader”).  The  Program  Leader  will  be  responsible  for  overseeing  the  list  of  Collaboration  Targets,  the
Discontinued Targets and the Continuation Targets. The Program Leaders shall regularly communicate with each other to address
R&D  Program-related  issues,  needs  and  updates  and  facilitate  communications  and  organization  of  Project  Leaders,  Working
Groups associated with all active Research Plan or Development Plan with respect to all Targets. Either Party, upon prior notice to
the other Party, may change its Program Leader. If the Project Leaders cannot agree under Section 6.1 on the Dispute, then, except
for those Disputes that are subject to the purview of the JSC, prior to submitting any Dispute to the dispute resolution mechanism
set forth in Section 19.6, the Program Leaders shall attempt, for a period of [* * *], to resolve such Dispute.

6.3    Alliance Leader. Within [* * *] of the Effective Date, each Party shall also appoint an individual to act as the Alliance
Leader at director level or above for such Party (each, an “Alliance Leader”). Each Alliance Leader shall thereafter be permitted to
attend meetings of the JSC and any sub-committee as a nonvoting observer. The  Alliance  Leaders  shall  be  the  primary  point  of
contact 
the
the  collaboration  activities  contemplated  by 
activities/responsibilities  of  the  Project  Leader  outlined  in  Section  6.1  and  the  activities/responsibilities  of  the  Program  Leader
outlined in Section 6.2) and shall help facilitate all such activities hereunder. For avoidance of doubt, the individual appointed by a
Party to act as an Alliance Leader may, but need not, be the same individual appointed by such Party as the Program Leader or as a
Project Leader.

this  Agreement 

the  Parties 

regarding 

(other 

than 

for 

6.4    Working Groups. The Parties may establish working groups (each, a “Working Group”) to oversee the activities of
the  Research  Plan  or  Development  Plan.  In  addition,  from  time  to  time,  the  Parties  may  establish  a  Working  Group  to  oversee
particular additional projects or activities. Each Working Group shall undertake the activities delegated to it by the JSC. During the
process of establishing each Working Group, such Working Group and the JSC shall agree regarding which matters such Working
Group will resolve on its own and which matters such Working Group will advise the JSC (and with respect to which such advice-
specific  matters  the  JSC  will  resolve).  In  addition  to  the  Target-specific  Working  Groups  overseen  by  the  respective  Project
Leaders,  the  Parties  shall,  at  a  minimum,  establish  [*  *  *]  additional  Working  Groups  to  oversee,  respectively,  (i)  technology
transfer pursuant to Section 7.4,  (ii)  the  manufacturing  supply  chain  for  the  Products,  (iii)  disclosure  of  Program  Inventions  and
strategy for prosecution and

38

maintenance  of  Joint  Inventions  (the  “Patent  Working  Group”);  and  (iv)  with  respect  to  work  conducted  through  Proof  of
Principle  and,  with  respect  to  the  first  Development  Candidate,  through  the  first  IND  filing,  matters  relating  to  chemistry,
manufacturing and controls (the “CMC Working Group”).

6.5    Joint Steering Committee.

6.5.1    Establishment. As soon as practicable after the Effective Date, the Parties shall establish a Joint Steering
Committee  (the  “JSC”)  to  oversee  and  coordinate  the  activities  of  the  Parties  under  the  R&D  Program.  The  Parties  will  either
continue  the  JSC  or  establish  additional  committees  to  oversee  and  coordinate  the  activities  of  the  Parties  during  the  R&D
Collaboration Term and the Development and Commercialization of Products. The JSC shall be comprised of [* * *] from Novo
and  [*  *  *]  from  Dicerna,  which  the  JSC  may  increase  as  its  discretion.  Subject  to  the  foregoing,  each  Party  shall  appoint  its
respective representatives to the JSC from time to time, and may change its representatives, in its sole discretion, effective upon
notice  to  the  other  Party  designating  such  change.  Representatives  from  each  Party  shall  have  appropriate  technical  credentials,
experience and knowledge pertaining to and ongoing familiarity with the R&D Program. [* * *] of the JSC appointed by [* * *]
shall  be  designated  the  JSC  Chair  (the  “JSC  Chair”).  The  JSC  Chair  will  be  responsible  for  calling  meetings  of  the  JSC,
circulating  agendas  and  performing  administrative  tasks  required  to  assure  efficient  operation  of  the  JSC  but  shall  not  have  any
extra or additional vote.

6.5.2    JSC Meetings. The JSC shall meet in accordance with a schedule established by mutual written agreement of
the Parties, and no less frequently than [* * *] until expiration of the R&D Collaboration Term or as mutually agreed. The JSC may
meet by means of teleconference, videoconference or other similar means. As appropriate, additional employees or consultants may
from  time  to  time  attend  the  JSC  meetings  as  nonvoting  observers,  provided  that  any  such  consultant  shall  agree  in  writing  to
comply with the confidentiality obligations under this Agreement; and provided further that no Third Party personnel may attend
unless otherwise agreed by both Parties. Each Party shall bear its own expenses related to the attendance of the JSC meetings by its
representatives. Each Party may also call for special meetings to resolve particular matters requested by such Party. The JSC Chair
or  his/her  designee  shall  keep  minutes  of  each  JSC  meeting  that  records  in  writing  all  decisions  made,  action  items  assigned  or
completed and other appropriate matters. Novo shall send meeting minutes to all members of the JSC promptly after a meeting for
review. Each member shall have [* * *] from receipt in which to comment on and to approve/provide comments to the minutes
(such approval not to  be  unreasonably  withheld,  conditioned  or  delayed). If  a  member,  within  such  time  period,  does  not  notify
Novo that s/he does not approve of the minutes, the minutes shall be deemed to have been approved by such member.

6.5.3    JSC Functions. The JSC’s responsibilities with respect to the R&D Program are as follows:

(a)    Overseeing and coordinating the activities of the Parties under the R&D Program;

39

(b)    Facilitating the exchange of Know-How and materials as required hereunder;

(a)    Approving plans and budgets for Development and Commercialization of Co-Development
Products (with all such plans and budgets to be initially proposed by Novo other than Co-Development Products
designated by Novo pursuant to Section 2.3.2 or Section 3.3);

(b)    Periodically reviewing the progress of the R&D Program;

(c)        Coordinating  the  Parties’  documentation  of  Research  Plans  and  Development  Plans,
suggesting  updates  to  and  modifications  of  each  Research  Plan  and  Development  Plan  and  establishing  the
Validated  Target  Criteria  for  each  Collaboration  Target.  For  clarification,  any  update  or  modification  to  the
Research Plan prior to Proof of Principle with respect to the relevant Compound shall require the consent of each
Party and is subject to reaching an agreement between the Parties with regards to any potential implications of
such modification or update; and

(d)    Amending the Work Flow Plan.

6.5.4    JSC Disputes; Authority. The JSC will endeavor to make decisions by consensus, with each of Novo and
Dicerna having [* * *]. If consensus is not reached by the Parties’ representatives pursuant to such vote, then the matter may be
escalated by either Party to designated officers of both Novo and Dicerna with appropriate decision-making authority. In the event
the designated officers are unable to resolve the issue within [* * *], then: [* * *]. Notwithstanding the foregoing, neither Party
may exercise decision making authority to unilaterally amend this Agreement, or to cause the other Party to perform any activities
or incur any material expenses that are not contemplated in this Agreement or the Work Flow Plan, Research Plan or Development
Plan, provided that during the pendency of any escalation or dispute resolution in accordance with this Section 6.5.4: [* * *].

6.5.5        Rights  and  Powers.  For  clarity  and  notwithstanding  the  creation  of  the  JSC,  each  Party  shall  retain  the
rights,  powers  and  discretion  granted  to  it  hereunder,  and  the  JSC  shall  not  be  delegated  or  vested  with  such  rights,  powers  or
discretion unless such delegation or vesting is expressly provided herein, or the Parties expressly so agree in writing. The JSC shall
not have the power to amend, waive or modify any term of this Agreement, and no decision of the JSC shall be in contravention of
any terms and conditions of this Agreement. It is understood and agreed that issues to be formally decided by the JSC are limited to
those specific issues that are expressly provided in this Agreement to be decided by the JSC. The JSC shall cease to operate, on a
Product-by-Product  basis,  once  Dicerna’s  option  with  respect  to  such  Product  under  Section  2.3.3  has  lapsed  without  being
exercised, and any obligations of either Party to provide any information to the JSC with respect to such Product shall be deemed to
be an obligation to provide such information directly to the other Party instead of through the JSC.

7.    LICENSES

40

7.1    License Grant to Novo. Subject to the terms and conditions of this Agreement, Dicerna hereby grants to Novo: (a) an
exclusive (even as to Dicerna), royalty bearing, sub-licensable (through multiple tiers) (subject to Section 7.2), worldwide, license
under the Licensed Technology to Develop, register, make (including formulate), have made, use, and Commercialize Compounds
and  Products  in  the  Field;  and  (b)  a  non-exclusive,  non-royalty  bearing,  fully  paid-up,  sub-licensable  (through  multiple  tiers)
(subject to Section 7.2), worldwide license under Licensed Technology to carry out Novo’s obligations under the R&D Program,
including  Research  and  Development  work  required  to  select  Targets  and  related  Compounds  and  Products  for  purposes  of  this
Agreement. To the extent Dicerna is no longer subject to the exclusivity obligations granted under the Lilly Agreement (whether
through the clearance process discussed in Section 2.6, termination of the Lilly Agreement, or otherwise), then, on a Collaboration
Target-by-Collaboration Target basis, such license granted by Dicerna to Novo in this Section 7.1 will also extend to the Excluded
Field with respect to all applicable Compounds and Products and Dicerna shall promptly notify Novo to such effect.

7.2    Sublicenses. [* * *].

7.3       License Grants to Dicerna. Novo  hereby  grants  to  Dicerna  during  the  Term  a  non-exclusive,  non-royalty  bearing,
fully  paid-up,  non-sub-licensable  (except  to  Affiliates  and  Permitted  Subcontractors  of  Dicerna  solely  as  needed  to  perform
services for Dicerna under this Agreement), worldwide license under Novo Intellectual Property, solely to the extent necessary for
Dicerna to perform its duties and obligations according to the R&D Program.

7.4    Know-How Transfer; Availability of Employees. Within [* * *] following Novo’s assumption of responsibility for
Development or Commercialization of a Product under Article 4  or  Novo’s  election  to  retain  rights  under  Section  15.2,  Dicerna
shall  disclose  and/or  deliver  to  Novo,  to  the  extent  not  previously  provided,  copies  of  all  data  and  information  in  Dicerna’s
possession relating to the Licensed Know-How which is reasonably necessary for Novo’s Development or Commercialization of
such Product (including for regulatory purposes). In addition, upon Novo’s reasonable request, Dicerna shall disclose and/or deliver
to Novo, to the extent not previously provided, copies of all data and information in Dicerna’s possession that would be reasonably
useful to Novo in manufacturing or having manufactured the Products, as well as authorization letters sufficient for Novo to be able
to place Product orders directly with Dicerna’s contract manufacturers pursuant to the terms of the applicable agreement between
Dicerna  and  such  manufacturers.  Upon  Novo’s  reasonable  request,  Dicerna  will:  (a)  provide  reasonable  technical  assistance  to
Novo during such disclosure or delivery set forth in the preceding two sentences; and (b) make its employees and non-employee
consultants reasonably available at their respective places of employment to consult with Novo on issues arising in the course of
Novo’s Research, Development, Manufacturing or Commercialization and in connection with any request related to a Product from
any  Regulatory  Agency,  including  regulatory,  scientific,  technical  and  clinical  testing  issues.  The  technology  transfer  to  be
undertaken under this Section 7.4 shall be overseen by the JSC or a Working Group established for such purposes, and the JSC or
such  Working  Group  may  put  in  place  a  technology  transfer  plan  expressly  identifying  Know-How  Controlled  by  Dicerna  to  be
transferred and the timing for such transfer.

41

7.5    Covenants. Dicerna covenants that it will not: (a) take any action that (i) would impose or result in a lien, charge or
encumbrance  of  the  Licensed  Technology  that  would  prevent  or  limit  Novo’s  exercise  of  its  licensed  rights  to  such  Licensed
Technology,  or  (ii)  adversely  affects  the  license  rights  granted  to  Novo  under  this  Agreement;  or  (b)  assign,  transfer,  convey  or
otherwise grant to any Person any rights to any Licensed Technology, Joint Know-How or Joint Patent Rights or any Compounds
or Products, in any manner that conflicts with the exclusive licenses granted to Novo pursuant to Section 7.1.

7.6    Mutual Use of Confidential Information. Subject to and without limiting any license rights or exclusivity granted to
Novo under this Agreement, each Party and its Affiliates will have the right to use any Confidential Information disclosed by the
other Party in connection with the R&D Program and retained in the unaided memories of its employees after having access to such
Confidential  Information  (without  reference  to  tangible  copies  of  such  information),  provided  that  this  right  to  use  does  not
constitute  a  license  under  any  Patent  Rights  or  copyrights.  An  individual’s  memory  will  be  considered  to  be  unaided  if  [*  *  *].
Notwithstanding anything to the contrary under this Section 7.6 and except as expressly authorized in this Agreement (including as
to  generally  applicable  information),  the  foregoing  does  not  permit  any  disclosure  by  either  Party  of  any  of  the  other  Party’s
Confidential Information regarding the Collaboration Targets, Compounds or Products or disclosure by either Party of any of the
other Party’s Confidential Information in any unpublished patent application owned (either solely or jointly) by the other Party.

7.7    No Implied Licenses. Except as expressly set forth in this Agreement, neither Novo, on the one hand, or Dicerna, on
the  other  hand,  by  virtue  of  this  Agreement,  shall  acquire  any  license  or  other  interest,  by  implication  or  otherwise,  in  any
materials, Know-How, Patent Rights or other intellectual property rights Controlled by the other Party or its Affiliates not expressly
granted  under  this  Agreement.  Furthermore,  notwithstanding  anything  to  the  contrary  in  this  Agreement,  by  entering  into  this
Agreement with Dicerna, Novo is not forfeiting any rights that Novo may have, including its rights to perform research activities in
compliance with 35 U.S.C. § 271(e)(1) or any experimental or research use exemption that may apply in any country.

7.8    Third Party IP Agreements.

7.8.1    Notwithstanding anything to the contrary in this Agreement, if after the Signing Date, Dicerna enters into any
agreement with a Third Party under which Dicerna acquires Control of any Patent Rights or Know-How that would be necessary or
reasonably useful for the Development or Commercialization of Collaboration Targets, Compounds, or Products, then Dicerna shall
so notify Novo and Novo shall have the option to include such Patent Rights and Know-How in the rights and licenses granted to
Novo  under  this  Agreement.  If  Novo  elects  to  include  such  rights  and  licenses,  Novo  shall  (a)  to  the  extent  the  Third  Party
agreement is a license agreement, be bound by the terms of such Third Party agreement applicable to a sublicensee thereunder, and
(b) reimburse Dicerna for the portion of any amounts that become owing to such Third Party by reason of the grant to, or exercise
by  or  under  the  authority  of,  Novo  of  such  rights;  provided,  that,  any  amounts  owing  to  such  Third  Party  shall  not  be
disproportionately  allocated  to  the  Collaboration  Targets,  Compounds,  Products  or  Novo’s  rights  hereunder  (e.g.,  the  upfront
payments, milestone payments, royalty for Product sales and other payments shall be fairly allocated

42

based on the extent to which such amounts are attributable to the applicable Collaboration Target, Compound or Product and taking
into  account  exploitation  of  the  Patent  Rights  and  Know-How  by  Dicerna  for  other  purposes).  In  such  event,  the  amounts
reimbursed by Novo shall be deductible as contemplated under Section 8.6.3(b) from all amounts owed to Dicerna under Sections
8.3 through 8.6. Upon request by Novo, Dicerna shall disclose to Novo a true and correct written description of the payment and
other relevant obligations. In the event Novo does not agree in writing to reimburse Dicerna for such amounts upon request, and (if
applicable) to be bound by the terms of such Third Party agreement applicable to a sublicensee thereunder, then the rights licensed
under such Third Party agreement shall thereafter be deemed excluded from the Licensed Patent Rights and/or Licensed Know-
How, as applicable, hereunder. Dicerna is solely responsible for, and shall make, all payments due to any Third Party licensors and
assignors  of  rights  included  in  the  Licensed  Technology  pursuant  to  its  agreements  relevant  to  such  rights,  and  Dicerna  shall
otherwise take all actions necessary to ensure that all such agreements remain in full force and effect.

7.8.2    If, after the Effective Date, Dicerna identifies Patent Rights or Know-How Covering or relating to RNAi or
oligonucleotide  platform  technologies  Controlled  by  a  Third  Party  that  would  be  necessary  or  reasonably  useful  for  inhibition,
disruption or modulation of mRNA in Collaboration Targets, then Dicerna shall so notify Novo and the Parties shall coordinate in
good faith the negotiation of [* * *] agreements in order to facilitate Novo having access to such technology, which may be through
an agreement directly between Novo and such Third Party. Any payments made by Novo to obtain such access shall be deductible
as contemplated under Section 8.6.3(b).

8.1    Upfront Payment; Escrow.

8.    FINANCIAL PROVISIONS

8.1.1    In consideration for the rights granted to Novo pursuant to this Agreement and Dicerna’s performance of its
obligations hereunder, including but not limited to, license grants under the Licensed Technology and Research and Development
services, Dicerna shall invoice Novo and Novo shall deposit with the Escrow Agent in a non-interest bearing account a one-time
upfront payment of One Hundred Seventy-Five Million U.S. Dollars (USD $175,000,000) (the “Upfront Payment”). Novo shall
make  such  deposit  to  the  Escrow  Agent  within  [*  *  *]  following  the  Effective  Date,  the  payment  of  which  to  Dicerna  shall  be
governed by this Section 8.1. Dicerna has provided an estimate for Research and Development services of [* * *] per Collaboration
Target to achieve Proof of Principle and the Parties estimate that approximately [* * *] Collaboration Targets will be the subject to
this Agreement. Within [* * *] after the Effective Date, Novo shall identify in writing [* * *] (the “Initial Targets”). Dicerna shall
prepare and deliver to Novo a bioinformatics package and mapping plan for at least one of the Initial Targets which if not identified
by Novo in such [* * *] period shall be one of the [* * *] Hepatocyte Targets previously cleared by Dicerna by the Gatekeeper (the
“Bioinformatics  Package  and  Mapping  Plan”).  Upon  delivery  to  Novo  of  the  Bioinformatics  Package  and  Mapping  Plan,
Dicerna shall certify to the Escrow Agent such delivery, whereupon the Escrow Agent shall pay to Dicerna the Upfront Payment,
which shall be non-refundable and non-creditable, within [* * *] of such certification. Novo shall execute, acknowledge and deliver
any and all documents and take any action as may be reasonably necessary

43

to assist Dicerna under the foregoing or to otherwise carry out the intent and purposes of this Section 8.1.

8.1.2    In the event the Bioinformatics Package and Mapping Plan is not delivered within [* * *] after the Effective
Date, as will be extended for factors outside Dicerna’s reasonable control, the Escrow Agent shall return the Upfront Payment. All
costs  and  expenses  associated  with  the  Escrow  Agent  and  Escrow  Agreement  shall  be  borne  by  Dicerna.  In  the  event  that  the
Escrow Agent fails to return the Upfront Payment to Novo as required by this Section 8.1.4, Dicerna shall immediately repay such
amount to Novo upon Novo’s demand, and in the event that the Escrow Agent fails to release the Upfront Payment to Dicerna as
required by Section 8.1.3, Dicerna shall hold harmless Novo from such failure and the payment of the Upfront Payment to Dicerna
shall be deemed to have been made in full by Novo.

8.2    Annual Fee. As additional consideration for the rights granted to Novo pursuant to this Agreement, including license
grants under the Licensed Technology, and for Dicerna’s performance of certain obligations hereunder, Novo shall pay to Dicerna
Seventy-Five  Million  U.S.  Dollars  (USD  $75,000,000)  to  be  split  into  three  non-refundable,  non-creditable  annual  payments  of
Twenty-Five  Million  U.S.  Dollars  (USD  $25,000,000),  provided  that  Dicerna  meets  the  requirements  to  deliver  the  minimum
number of Mapped Targets as set forth below. Dicerna shall invoice Novo and Novo shall pay the annual payments within [* * *]
of  (1)  the  first  anniversary  of  the  Effective  Date,  if  Dicerna  has  delivered  to  Novo  at  least  [*  *  *]  Mapped  Targets  or,  if  fewer
Collaboration  Targets  are  selected  by  Novo  to  be  Mapped  Targets,  such  fewer  number  of  Mapped  Targets,  (2)  the  second
anniversary of the Effective Date, if Dicerna has delivered another at least [* * *] (or such fewer additional Collaboration Targets
selected by Novo to be Mapped Targets) Mapped Targets in addition to the initial minimum number of Mapped Targets delivered
under clause (1) of this Section 8.2 and (3) the third anniversary of the Effective Date, if Dicerna has delivered another at least [* *
*] (or such fewer additional Collaboration Targets selected by Novo to be Mapped Targets) Mapped Targets in addition to the initial
minimum number of Mapped Targets delivered under clauses (1) and (2) of this Section 8.2. In the event Novo terminates pursuant
to Section 14.2 or Dicerna terminates pursuant to Section 14.3, prior to the third anniversary of the Effective Date, then [* * *] of
the outstanding, unearned annual payments will become due and payable by Novo to Dicerna.

8.3    Pre-Clinical Milestones; DC Milestones.

8.3.1        Pre-Clinical Milestones. Except  for  Co-Development  Products,  which  shall  not  be  eligible  for  milestone
payments  under  this  Section  8.3,  on  a  Collaboration  Target-by-Collaboration  Target  (other  than  Dicerna  Orphan  Liver  Targets)
basis, with respect to a Product Directed To the applicable Collaboration Target, within [* * *] after first achievement of either (1)
Proof of Principle for the first Product Directed To the first applicable Collaboration Target or (2) Initiation of GLP Tox Studies for
the first Product Directed To all subsequent applicable Collaboration Targets (each, a “Pre-Clinical Milestone Event”), Novo shall
notify Dicerna and make a [* * *] milestone payment to Dicerna (each, a “Pre-Clinical Milestone Payment”). Such payment shall
be non-refundable and non-creditable and due only once for the first Product Directed To the applicable Collaboration Target to
achieve the Pre-Clinical Milestone Event regardless of

44

the repeated achievement of the Pre-Clinical Milestone Event by the same Product, irrespective of how many indications for which
the  Product  is  Developed  or  Commercialized.  For  the  avoidance  of  doubt,  if  any  Pre-Clinical  Milestone  Payment  is  made  with
respect  to  a  particular  Product,  such  Pre-Clinical  Milestone  Payment  will  not  be  due  for  any  other  Product  hereunder  that  is
Directed To the same Target as such Product.

8.3.2    DC Milestones. If at least [* * *] Compounds achieve Proof of Principle and are nominated as Development
Candidates  as  contemplated  under  Section  2.2,  then  for  each  subsequent  Compounds  that  achieves  Proof  of  Principle  and  is
nominated as a Development Candidate (i.e., for the [* * *] and subsequent such Compounds), Novo shall make a first [* * *])
milestone payment to Dicerna upon such achievement and nomination and a second [* * *] milestone payment to Dicerna upon the
first  dosing  of  a  patient  in  a  Phase  1  Clinical  Trial  with  such  Compound.  Such  payments  shall  be  non-refundable  and  non-
creditable.

8.4        Development  and  Regulatory  Milestones.  Except  for  Co-Development  Products,  which  shall  not  be  eligible  for
milestone payments under this Section 8.4,  on  a  Collaboration  Target-by-Collaboration  Target  (other  than  Dicerna  Orphan  Liver
Targets)  basis,  within  [*  *  *]  after  first  achievement  of  each  milestone  set  forth  in  the  table  below  by  Novo,  its  Affiliate  or
sublicensee  of  Novo’s  rights  with  respect  to  the  first  Product  Directed  To  the  applicable  Collaboration  Target  (each,  a
“Development and Regulatory Milestone Event”), Novo shall notify Dicerna and make the corresponding milestone payment to
Dicerna (each, a “Development and Regulatory Milestone Payment”). Such payment shall be non-refundable and non-creditable
and [* * *].

Development and Regulatory Milestone Events

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

45

Development and Regulatory
Milestone Payments

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

[* * *]

 
8.5    Commercialization Milestones. Subject to Sections 2.3.2 and 5.4, except for Co-Development Products, which shall
not be eligible for milestone payments under this Section 8.5 if such Products are designated as Co-Development Products, on a
Collaboration Target-by-Collaboration Target basis, within [* * *] after the end of the [* * *] in  which each milestone  event  set
forth in the table below is first achieved by Novo, its Affiliate or its sublicensee (unless Dicerna or its Affiliate is the sublicensee)
of Novo’s rights with respect to the first Product Directed To the applicable Collaboration Target (each, a “Commercial Milestone
Event”), Novo shall notify Dicerna and make the corresponding, non-refundable (except as set forth in Section 5.4), non-creditable
milestone payment to Dicerna (each, a “Commercial Milestone Payment”):

Commercial Milestone Events

Commercial Milestone Payments

[* * *]
[* * *]
[* * *]

[* * *]
[* * *]
[* * *]
[* * *]

[* * *]
[* * *]
[* * *]
[* * *]

The Commercial Milestone Payment shall be payable only once, irrespective of how many indications for which the first Product is
Developed  or  Commercialized.  For  the  avoidance  of  doubt,  if  any  Commercial  Milestone  Payment  is  made  with  respect  to  a
particular Product, such Commercial Milestone Payment shall be payable for any other Product hereunder that is Directed To the
same Target as such Product.

8.6    Royalties.

8.6.1    Royalty Payments. Subject to Sections 2.3.2, 2.3.3, 3.3 and 5.4, except for Co-Development Products, which
shall not be eligible for royalties under this Section 8.6 if such Products are designated as Co-Development Products, on a Product-
by-Product basis, within [* * *] after the end of each Calendar Year during the Royalty Term, Novo shall pay Dicerna a royalty on
only  that  portion  of  Net  Sales  of  a  Product  as  designated  below  and  at  the  rates  set  forth  below  (each  such  royalty  payment,  a
“Royalty”):

Annual Worldwide Net Sales on a Product-by-Product basis

[* * *]
[* * *]
[* * *]
[* * *]
[* * *]

   Royalty Rate
[* * *]
[* * *]
[* * *]
[* * *]
[* * *]

8.6.2        Royalty Term.  The  Royalty  will  be  payable  on  a  country-by-country  and  Product-by-Product  basis  from
First  Commercial  Sale  of  the  Product  in  such  country  and  shall  terminate  upon  the  latest  of:  (a)  such  Product  no  longer  being
Covered by at least one Effective

46

 
 
Patent Claim in such country that is either (1) Controlled by Dicerna or one of its Affiliates as of the Signing Date or (2) Controlled
by  Dicerna  or  one  of  its  Affiliates  only  after  the  Signing  Date  and  claiming  an  Invention  conceived  by  Dicerna  or  one  of  its
Affiliates that is a GalXC Patent or a Product-Specific Patent; (b) the expiration of New Chemical Entity Regulatory Exclusivity
granted to such Product, but no longer than [* * *] from such grant; and (c) [* * *] after the First Commercial Sale of such Product
in  such  country  (the  “Royalty  Term”),  in  each  case  subject  to  Section  8.6.3.  For  the  avoidance  of  doubt,  any  Patent  Rights
Covering Improvements to GalXC Platform IP that are discovered, conceived or otherwise generated solely by Novo and assigned
to Dicerna under Section 10.4 are not within the scope of the Effective Patent Claims described in the foregoing Section 8.6.2(a),
and no Royalties will be payable by Novo with respect to any such Patent Rights.

8.6.3        Royalty  Step-Downs.  The  Royalties  under  Section  8.6.1  shall  be  reduced  by  the  following  step-down

provisions:

(a)    Effective Patent Claims.

(i)    Notwithstanding Section 8.6.1, on a country-by-country and Product-by-Product basis, if
at the time of or after the First Commercial Sale of a particular Product in a country or anytime thereafter,
such  Product  is  not  Covered  by  one  or  more  Effective  Patent  Claims  in  such  country,  then  the  Royalty  at
which Novo is required to pay during the Royalty Term to Dicerna on the Net Sales of such Product in such
country shall be reduced by [* * *] of the Royalty rate set forth in Section 8.6.1 for the rest of the Royalty
Term.

(ii)    Notwithstanding Section 8.6.1, on a country-by-country and Product-by-Product basis, if
at the time of or after the First Commercial Sale of a particular Product in a country or anytime thereafter,
either (A) such Product is not Covered by one or more Effective Patent Claims of Product-Specific Patents
but is Covered by one or more Effective Patent Claims in other Licensed Patent Rights in such country or (B)
such  Product  is  not  Covered  by  any  issued  Effective  Patent  Claim  but  is  Covered  by  a  pending  Effective
Patent Claim, then the Royalty at which Novo is required to pay during the Royalty Term to Dicerna on the
Net Sales of such Product in such country shall be reduced by [* * *] to [* * *] of the Royalty rate set forth
in Section 8.6.1 for the rest of the Royalty Term.

(b)    Third Party Payments – Anti-Stacking. If Novo reasonably determines that Novo and/or its
Affiliates  or  sublicensees  need  to  acquire  a  Third  Party’s  Patent  Rights  (excluding  Patent  Rights  solely  claiming
methods of Manufacture) or obtain a license under a Third Party’s Patent Rights in order to avoid infringement of
such Patent Rights (including a patent of an Acquirer that is not part of the Licensed Patents) in order to Research,
Develop  or  Commercialize  a  Compound  or  Product  in  a  particular  country  or  in  the  event  that  Novo  makes  any
payments to Dicerna or a Third Party as contemplated under Sections 7.8, then Novo shall have the right to deduct
[* * *] of all payments due from Novo and/or its

47

Affiliates  or  sublicensees  under  the  applicable  agreement  with  the  Third  Party  and  all  such  payments  as
contemplated under Section 7.8 from the payments owed to Dicerna under Sections 8.3 through 8.5 and the Royalty
owing to Dicerna during the applicable period for the such Product under Section 8.6.1, as applicable, subject to the
Royalty reduction floor as set forth in Section 8.6.3(d).

(c)        Generic  Competition.  On  a  country-by-country  and  Product-by-Product  basis,  if  Generic
Products reach a market share, on a unit basis, equal to or higher than [* * *] of the aggregate units of such Generic
Products and a Product containing a GalXC Molecule Directed To the same Collaboration Target as such Generic
Products  sold  in  any  country  during  any  [*  *  *],  then  Novo’s  obligation  to  pay  Royalties  to  Dicerna  for  the
applicable Product in the applicable country under Section  8.6.1 shall be reduced by [* * *] beginning with such [* *
*]. On a country-by-country and Product-by-Product basis, if Generic Products reach a market share, on a unit basis,
equal to or higher than [* * *] of the aggregate units of such Generic GalXC Products and a Product containing a
GalXC Molecule Directed To the same Collaboration Target as such Generic GalXC Products sold in any country
during any [* * *], then Novo’s obligation to pay Royalties to Dicerna for the applicable Product in the applicable
country shall terminate and be of no further force or effect for and after such [* * *], at which point the Royalty
Term  for  that  Product  shall  also  be  considered  terminated  in  that  country.  For  purposes  of  the  foregoing  royalty
reductions, unit sales shall be determined by reference to applicable sales data obtained from IQVIA or from such
other  source  for  such  sales  data  as  may  be  agreed  by  the  Parties;  provided  that  if  applicable  sales  data  is  not
available  from  IQVIA  and  the  Parties  are  unable  to  agree  on  an  alternative  data  source,  Novo  may  determine  a
reasonable  alternative  data  source  after  consultation  with  the  JSC,  which  reasonable  alternative  shall  be  a  well-
established data source widely used in the pharmaceutical industry.

(a)    Limit on Royalty Reductions. In no event shall the Royalties owed under Section 8.6.1, with
respect to a Product in a country, be reduced by operation of Sections 8.6.3(a) or 8.6.3(b) by more than an aggregate
of [* * *] of what would otherwise be owed under the table set forth in Section 8.6.1 with respect to such Product in
such country. To the extent that the reductions under Sections 8.6.3(a) or 8.6.3(b) would, but for the limitation in the
foregoing  sentence,  result  in  a  Royalty  that  would  be  less  than  [*  *  *]  of  what  would  otherwise  be  owed,  the
difference  between  such  lower  Royalty  and  the  Royalty  payable  due  to  the  forgoing  limitation  shall  be  carried
forward and deducted against any and all subsequent payments due to Dicerna from Novo hereunder until the end of
the  Royalty  Term.  For  the  avoidance  of  doubt,  the  foregoing  limitation  on  reductions  does  not  affect  Section
8.6.3(c),  and any reduction under Section 8.6.3(c)  shall  be  made  net  of  any  reductions  made  pursuant  to  Sections
8.6.3(a) and 8.6.3(b) (e.g., if the maximum reduction of [* * *] is reached under Sections 8.6.3(a) and 8.6.3(b) and
the reduction of [* * *] in Section 8.6.3(c) is also reached, the net Royalty will be [* * *] of what would otherwise
be owed).

48

8.1    Co-Development Programs. With  respect  to  Co-Development  Products,  the  Parties  shall  share  in  costs,  profits  and  losses  as  described  under  Section 5.4 and

Exhibit F.

9.    REPORTS AND PAYMENT TERMS

9.1    Net Sales Reports and Royalties Due. During the Royalty Term, Novo shall furnish to Dicerna a written report for
each  [*  *  *]  showing  the  global  Net  Sales  by  Product,  except  for  Co-Development  Products,  sold  by  Novo,  its  Affiliate  or
sublicensee during the reporting [* * *], the Royalties payable under this Agreement and whether a Commercial Milestone Event
has been achieved in sufficient detail to allow Dicerna to verify the amount of Royalties or Commercial Milestone Payments paid
by Novo with respect to such Calendar Quarter, including on a Product-by-Product basis, the Net Sales of each Product, and the
Royalties  (in  USD)  payable  and  in  total  for  all  Products.  Reports  shall  be  due  no  later  than  [*  *  *]  following  the  end  of  each
Calendar Quarter. Royalties shown to have accrued by each report provided under this Section 9.1 and any Commercial Milestone
Payment achieved in such Calendar Quarter shall be due and payable on the date such report is due.

9.1    Payment Currency / Exchange Rate. All payments to be made by Novo to Dicerna under this Agreement shall be
made  in  USD.  Payments  to  Dicerna  shall  be  made  by  electronic  wire  transfer  of  immediately  available  funds  to  the  account  of
Dicerna, as designated in writing to Novo. If any currency conversion is required in connection with the calculation of amounts
payable hereunder, such conversion shall be made in accordance with Section V of Exhibit F.

9.1    Novo Nordisk Invoicing Instructions. Any payment payable by Novo under this Agreement, including payments under Sections 4.4.2, 5.4.2, 5.4.3, 8.1, 8.2,

8.3, 8.4, 8.5 and 8.6, is subject to receipt by Novo of an invoice prepared in accordance with the Novo Nordisk Invoicing Instructions set forth in Exhibit C.

9.1    Taxes.

Each Party shall be responsible for the payment of all income and other taxes (including interest) (“Taxes”) imposed

on its own income arising under this Agreement.

9.1.1        If  Applicable  Laws  require  the  withholding  of  Taxes  by  either  Party  or  its  Affiliates,  such  Taxes  shall  be
retained  by  the  Party  making  such  payment  (the  “Payor”)  as  required  by  such  Applicable  Law  from  such  remittable  royalty  or
other payment and shall be timely remitted by the Payor to the proper tax authorities on behalf of the Party with respect to which
such deduction and withholding was made (the “Payee”); provided, however, that notwithstanding anything in this Agreement to
the contrary, if Novo’s assignment of this Agreement leads to the imposition of any additional withholding Tax liability on Dicerna
that would not have been imposed in the absence of such action or in an increase in such liability above the liability that would
have  been  imposed  in  the  absence  of  such  action,  Novo  will  indemnify  and  hold  harmless  Dicerna  from  any  such  additional  or
increased withholding Tax liability (except to the extent that Dicerna or any of its Affiliates can reclaim it, provided that Dicerna
will be reimbursed for any reasonable out of pocket costs incurred in the reclaim). If Dicerna’s assignment of this Agreement leads
to a requirement for Novo to withhold any additional Tax, the imposition of any additional withholding Tax liability that would not
have been imposed in the absence of such action or in an increase in such liability above the liability that would have been imposed
in the absence of such action, Dicerna will be

49

liable  for  such  additional  or  increased  withholding  Tax  and  indemnify  and  hold  Novo  harmless  from  any  such  additional  or
increased withholding tax liability (except to the extent that Novo or any of its Affiliates can reclaim it, provided that Novo will be
reimbursed for any reasonable out of pocket costs incurred in the reclaim). The Parties shall cooperate and exercise their reasonable
best efforts to ensure that any such withholding Taxes are mitigated or reduced to the extent possible under the provisions of any
Applicable Law, and shall provide Payee reasonable assistance (including the provision of any Tax forms and other information) in
order  to  allow  Payee  to  obtain  the  benefit  of  any  present  or  future  treaty  against  double  taxation  or  exemption  from  refund  or
reduction in Taxes which may apply to such payments. To the extent that a Party is required to deduct and withhold Taxes on any
such payment pursuant  to  this Section 9.4,  such  Party  will  provide  the  Payee  with  written  notice  of  the  required  withholding  as
promptly as reasonably practical (and in any event, no later than [* * *]) prior to making such payment. To the extent such amounts
are  so  deducted  and  withheld  and  timely  remitted  to  the  relevant  tax  authorities,  such  amounts  shall  be  treated  for  all  purposes
under this Agreement as having been paid to the Person to whom such amounts would otherwise have been paid. The Payor shall
promptly  (as  available)  submit  to  the  Payee  appropriate  proof  of  payment  of  the  withheld  Taxes  as  well  as  the  official  receipts
sufficient to enable the Payee to claim credits for such payments of Taxes.

9.1.2    Novo shall use reasonable efforts to obtain and deliver to Dicerna on an annual basis and within [* * *] of
Dicerna’s  request  to  provide,  information  as  reasonably  requested  by  Dicerna  that  is  sufficient  to  meet  any  documentation
requirements imposed by regulations issued under Section 250 of the Internal Revenue Code of 1986, as amended (the “Internal
Revenue  Code”),  for  the  treatment  of  an  appropriate  portion  of  such  amounts  as  “foreign-derived  deduction  eligible  income”
within  the  meaning  of  Section  250  of  the  Internal  Revenue  Code  and  the  regulations  thereunder.  Novo  shall  not  be  required  to
deliver  such  information  which  Novo  reasonably  deems  sensitive  or  which  would  be  unlawful  according  to  Danish  or  U.S.  law.
Dicerna  shall  compensate  Novo  for  any  internal  and  external  costs  associated  with  obtaining  and  delivering  the  information  to
Dicerna.

9.1.3    The Parties intend that this Agreement will not be treated as a partnership or joint venture for United States
federal and state tax purposes, and each Party will file all tax returns and will otherwise take all tax reporting positions in a manner
consistent with such treatment.

9.1.4    It is understood and agreed between the Parties that any payments made by any Party under this Agreement
are  exclusive  of  any  value  added  tax  (“VAT”)  or  similar  Tax  imposed  upon  such  payments.  Where  VAT  is  properly  added  to  a
payment made under this Agreement, the paying Party will pay the amount of VAT only on receipt of a valid Tax invoice issued in
accordance with Applicable Law.

9.2    Audit Rights (Financial).

9.2.1    [* * *].

9.2.2    [* * *].

1.    INTELLECTUAL PROPERTY RIGHTS

50

1.1    Disclosure of Inventions. [* * *].

1.2    Notification of Issuance. Novo and Dicerna shall each promptly notify the other in writing of any issuance of each

patent included in the Licensed Patent Rights or Joint Patent Rights of which they become aware via the Patent Working Group.

1.3    Novo Background IP. [* * *].

1.4    Dicerna Background IP. As between the Parties, Dicerna shall own and Control all right, title and interest in and to
all  Patent  Rights  or  Know-How  Controlled  by  Dicerna  and  existing  as  of  or  before  the  Effective  Date,  including  any  GalXC
Platform IP, or generated or acquired outside the scope of the R&D Program and this Agreement, and shall own any Improvements
to any of the foregoing made by Dicerna or an Affiliate of Dicerna and any Improvements to GalXC Platform IP made by Novo or
an Affiliate of Novo generated in connection with this Agreement, but excluding Novo Product Patents, Product-Specific Patents
and Product-Specific Know-How (“Dicerna Background IP”). Novo hereby assigns and agrees to assign to Dicerna all right, title
and interest in and to any Improvements to GalXC Platform IP, that are discovered, conceived or otherwise generated by Novo in
connection  with  the  R&D  Program  or  otherwise  under  the  Agreement.  For  purposes  of  clarity,  (1)  Improvements  to  GalXC
Platform IP do not constitute Joint Patent Rights and (2) Joint Patent Rights do not constitute Improvements to GalXC Platform IP.
If the Parties determine by mutual agreement that any Novo Know-How shall necessarily be contributed to the development of the
GalXC  Platform,  the  Parties  shall  develop  a  mutually  acceptable  strategy  for  prosecution  of  any  Patent  Rights  directed  to  such
Novo Know-How through a joint patent process via the Patent Working Group, prior to contributing such Novo Know-How to the
GalXC Platform.

1.5    Program Inventions; Joint Inventions.

1.5.1    Ownership. [* * *].

1.5.2    Exploitation[* * *].

1.5.3    Assignment and Transfer of Interests in Joint Inventions. [* * *].

1.6    Cooperation. Each Party represents and covenants that all of such Party’s employee(s), contractor(s) and agent(s) are
or  will  be  obligated  under  a  binding  written  agreement  or  otherwise  to  assign  to  such  Party  all  Program  Inventions  made  or
conceived by such employee(s), contractor(s) or other agent(s) in connection with this Agreement. The Parties shall cooperate to
file, prosecute, and maintain Joint Inventions and Joint Patent Rights as may reasonably be needed.

1.7    Filing, Prosecution, Enforcement and Defense.

1.7.1    GalXC Patents and Dicerna Background IP. [* * *].

1.7.2    Product-Specific Patents. [* * *].

1.7.1    Joint Patent Rights. [* * *].

51

1.7.2    Abandonment of Patent Rights. If either Party elects to cease the filing, prosecution, maintenance and/or
defense  of  a  Patent  Right  for  which  Dicerna  or  Novo,  as  applicable,  is  in  control  of  the  filing,  prosecution,  maintenance  and/or
defense of Product-Specific Patents pursuant to Section 10.7.2 or Joint Patent Rights pursuant to Section 10.7.3 in any country of
the Territory, the abandoning Party shall provide the other Party with written notice promptly following its decision to abandon the
filing,  prosecution,  maintenance  and/or  defense  of  such  Patent  Right,  but  in  no  event  later  than  [*  *  *]  before  the  next  relevant
deadline relating to or any public disclosure of the relevant Patent Right. In such event, the abandoning Party shall permit the other
Party, at such other Party’s sole discretion, to take over or continue, as the case may be, the filing, prosecution, maintenance and
defense of such abandoned Patent Right on behalf of and in the name of the abandoning Party, but at the other Party’s own expense.
If  the  other  Party  elects  to  take  over  and  continue  such  filing,  prosecution,  maintenance  or  defense,  the  abandoning  Party  shall
execute such documents and perform such acts, at the other Party’s expense, as may be reasonably necessary to permit the other
Party to take over and continue the filing, prosecution, maintenance and/or defense of such abandoned Patent Right on behalf and
in the name of the abandoning Party and at the other Party’s own expense. For the avoidance of doubt, the abandoning Party shall
remain the owner of the abandoned Patent Right(s) but shall have no further say in the filing, prosecution, maintenance and defense
of  such  abandoned  Patent  Right(s);  provided,  however,  that  the  other  Party  shall  timely  inform  the  abandoning  Party  if  it  too
decides to finally abandon the respective Patent Right, in which event the abandoning Party shall have the right to re-assume sole
responsibility for ongoing prosecution, maintenance and defense of such abandoned Patent Right in accordance with this Section
10.7.4. Notwithstanding the foregoing, if Novo determines, in its sole discretion following good faith discussions with Dicerna, that
any such abandonment is necessary to avoid detrimental effect to any Product-Specific Patent or Joint Patent Right, then, subject to
Sections 10.7.2 and 10.7.3, Dicerna shall have no right pursuant to this Section 10.7.4 to elect to take over and continue the filing,
prosecution, maintenance or defense of such Product-Specific Patent or Joint Patent Right.

1.7.3        Notification  of  Infringement.  Novo  and  Dicerna  shall  each  promptly  notify  the  other  in  writing  of  any
alleged  or  threatened  infringement  of  the  Licensed  Patent  Rights  or  Joint  Patent  Rights  of  which  they  become  aware  (each,  an
“Action”), and the prosecution and enforcement of such alleged or threatened infringement of the Licensed Patent Rights or Joint
Patent Rights shall be done in accordance with this Section 10.7.

1.7.4        Control  of  Enforcement  Actions.  The  Party  specified  in  this  Section  10.7  as  having  control  over
enforcement  of  particular  Patent  Rights  alleged  or  threatened  to  be  infringed  in  an  Action  (the  “Initial Party”)  may  commence
litigation with respect to the alleged or threatened infringement at its own expense or otherwise seek to handle such Action. If the
Initial Party elects, in its sole discretion, to handle such an Action, the Initial Party shall control such Action, and the Initial Party
may enter into settlements, stipulated judgments or other arrangements respecting such infringement; provided, however, the Initial
Party shall not take any action, including legal action, settle or make any agreement that adversely affects the other Party’s rights or
interests,  including  any  settlement  or  agreement  which  admits  or  concedes  that  any  aspect  of  any  of  the  Joint  Patent  Rights  or
Licensed Technology is invalid or unenforceable or which adversely affects the scope of any of the Joint Patent Rights or Licensed
Technology (in cases where Dicerna is the Initial Party) or Licensed Technology (in cases where Novo is the Initial Party), without
the prior written consent

52

of the other Party. The Initial Party shall keep the other Party reasonably apprised of the progress of any such Action. The other
Party may, at its option and sole expense, be represented by counsel of its choice, but all other expenses associated with any such
Action shall be at the sole expense of the Initial Party. In the event that the Initial Party does not commence litigation or otherwise
address an Action within [* * *] following the date on which Novo or Dicerna (as applicable) notifies the other Party of any alleged
or threatened infringement of the Licensed Patent Rights or Joint Patent Rights of which they become aware pursuant to Section
10.7.5, the other Party may do so, at the other Party’s expense; provided, however, that: [* * *]. Notwithstanding the foregoing, if
an Action involves Product-Specific Patents, Novo may determine whether or not to enforce such Product-Specific Patents in its
sole  discretion;  provided  that  Novo  shall  not  enforce  such  Product-Specific  Patents  except  against  infringing  Competing  GalXC
Products. In any Action, (a) the Party not in control of enforcing such Action will reasonably cooperate with the enforcing Party,
including, if required to bring such action, the furnishing of a power of attorney, and (b) any damages or other recovery, including
compensatory  and  other  non-compensatory  damages  or  recovery  actually  received  from  a  Third  Party,  shall  first  be  used  to
reimburse the Parties for their respective reasonable costs and expenses incurred in connection with such Action. Any  remaining
recovery shall be paid to Novo and [* * *].

1.7.5        Patent  Term  Extension.  The  Parties  shall  consult  with  and  cooperate  and  coordinate  with  each  other  in
obtaining patent term extensions or supplemental protection certificates and the like with respect to the Licensed Patent Rights, in
each country and region where it is possible to do so. Novo will elect whether to pursue patent term extensions or supplemental
protection certificates [* * *] and Dicerna agrees to abide by such election. Any request by Novo to pursue patent term extensions
or  supplemental  protection  certificates  [*  *  *]  shall  not  unreasonably  be  refused  by  Dicerna.  Dicerna  shall  provide  prompt  and
reasonable assistance, as requested by Novo, at Novo’s reasonable, pre-approved expense, including by taking such action as may
be required of the patent holder under any Applicable Laws to obtain such patent extension or supplementary protection certificate.

1.7.1        Patent  Listing.  Novo  will  promptly,  accurately  and  completely  list,  with  the  applicable  Regulatory
Authorities during the Term, all applicable [* * *] for a Product. Prior to such listings, the Parties will meet, through the JSC, to
evaluate and identify all applicable Patent Rights. Notwithstanding the preceding sentence, Novo will retain final decision-making
authority as to the listing of all applicable [* * *].

1.7.2    Filing Countries. [* * *].

1.8        Management  of  Novo  Background  Patents.  Novo  shall  have  sole  responsibility  for  and  control  over  the  filing,

prosecution, maintenance and enforcement of the Novo Patents (other than the Joint Patent Rights), at Novo’s sole expense.

1.9    Product Infringement. [* * *].

1.10    Product Trademarks. Novo will be free, in its sole discretion, to use and to register in any trademark office in the
Territory  any  trademark  for  use  with  a  Product;  provided,  that  nothing  herein  shall  grant  Novo  any  right  to  use  any  trademark
Controlled by Dicerna and/or its Affiliates.

53

Subject to the foregoing, Novo shall have the right to select, and shall own all right, title and interest in and to, any such trademark
relating  to  a  Product  that  it  selects  during  and  after  the  Term.  Upon  Dicerna’s  request,  Novo  shall  recognize  Dicerna  in  a  press
release associated with the Regulatory Approval of any Product.

1.1        Inventorship and Title.  Inventorship  of  inventions  shall  be  determined  in  accordance  with  the  patent  laws  of  the

United States.

1.2    Invention Disclosure and Recordkeeping. Each Party shall use its established policies to ensure that all inventions
shall be documented by employees and consultants conducting research subject to this Agreement, in a way that makes clear: (a)
the  identity  of  each  individual  involved  in  any  particular  experimental  result  and  the  identity  of  each  individual  creating  any
document concerning the research; (b) the date that each particular experiment was executed; and, (c) the date each experimental
result was recorded.

1.3        Consultation  on  Program  Inventions.  Neither  Party  will  knowingly  and  intentionally  take  an  action  that  could
reasonably be expected to give rise to a declaratory judgment action seeking nullity of a Program Invention without consulting the
other Party. However, if any Program Invention, other than a Product-Specific Patent, becomes the subject of a legal action or claim
seeking declaratory relief, revocation or nullity of Program Invention, or is subject to an interference, inter partes re-examination,
opposition  or  similar  proceeding  with  regard  to  a  Program  Invention,  the  Parties  shall  promptly  consult  with  one  another
concerning the defense of such action, claim or proceeding.

2.    CONFIDENTIALITY

2.1    Duty of Confidence. During the Term and for [* * *] thereafter, all Confidential Information disclosed by one Party to
the other Party hereunder shall be maintained in confidence by the receiving Party and shall not be disclosed to any Third Party or
used for any purpose, except as set forth herein, without the prior written consent of the disclosing Party. The recipient Party may
only  use  Confidential  Information  of  the  other  Party  for  purposes  of  exercising  its  rights  and  fulfilling  its  obligations  under  this
Agreement  and  may  disclose  Confidential  Information  of  the  other  Party  and  its  Affiliates  to  employees,  agents,  contractors,
consultants  and  advisers  of  the  recipient  Party  and  its  Affiliates,  licensees  and  actual  and  potential  sublicensees  to  the  extent
reasonably necessary for such purposes; provided that such persons and entities are bound by confidentiality and non-use of the
Confidential  Information  substantially  as  protective  as  the  confidentiality  provisions  of  this  Agreement  as  they  apply  to  the
recipient Party.

2.2    Exceptions. The obligations under this Article 11 shall not apply to any information to the extent the recipient Party

can demonstrate by competent written evidence that such information:

(a)    is (at the time of disclosure) or becomes (after the time of disclosure) known to the public or part of the
public domain through no breach of this Agreement by the recipient Party or its Affiliates;

54

(b)    was known to, or was otherwise in the possession of, the recipient Party or its Affiliates prior to the time
of disclosure by the disclosing Party;

(c)       is  disclosed  to  the  recipient  Party  or  an  Affiliate  by  a  Third  Party  on  a  non-confidential  basis  that  is
entitled to disclose it without breaching any confidentiality obligation with respect to such information; or

(d)    is independently developed by or on behalf of the recipient Party or its Affiliates, as evidenced by its
written records, without use of or reference to the Confidential Information disclosed by the disclosing Party
or its Affiliates under this Agreement.

2.3        Authorized  Disclosures.  Subject  to  this  Section  11.3,  the  recipient  Party  may  disclose  Confidential  Information

(including the Agreement) belonging to the other Party as follows:

2.3.1        if  such  disclosure  is  deemed  necessary  by  counsel  to  the  recipient  Party  to  be  disclosed  to  such  Party’s
attorneys, independent accountants or financial advisors for the sole purpose of enabling such attorneys, independent accountants
or  financial  advisors  to  provide  advice  to  the  receiving  Party,  on  the  condition  that  such  attorneys,  independent  accountants  and
financial advisors are bound by confidentiality and non-use obligations substantially as protective as the confidentiality provisions
of this Agreement as they apply to the recipient Party.

2.3.2    to governmental or other regulatory agencies in order to obtain and maintain Patent Rights consistent with

Article 10, but provided that such disclosure may be only to the extent reasonably necessary to obtain and maintain Patent Rights.

2.3.3    to governmental or other regulatory agencies by (a) Novo or a Novo Affiliate, licensee or sublicensee to gain
or  maintain  approval  to  conduct  Clinical  Trials  for  a  Product,  to  obtain  and  maintain  Marketing  Authorization  or  to  otherwise
Research, Develop and Commercialize Products, or (b) Dicerna or a Dicerna Affiliate, licensee or sublicensee to gain or maintain
approval  to  conduct  Clinical  Trials  for  a  Returned  Compound  or  Product,  to  obtain  and  maintain  Marketing  Authorization  or  to
otherwise  Research  Develop  and  Commercialize  Returned  Compounds  and  Products,  but  provided,  in  each  case,  that  such
disclosure may be only to the extent reasonably necessary to obtain or maintain Marketing Authorizations.

2.3.4    to the extent required in connection with any judicial or administrative process relating to or arising from this

Agreement (including any enforcement hereof) or to comply with applicable court orders or governmental regulations.

2.3.5       if the recipient Party is required by judicial or administrative process to disclose Confidential Information
that is subject to the non-disclosure provisions of this Article 11, in which case such Party shall promptly inform the other Party of
the disclosure that is being sought in order to provide the other Party an opportunity to challenge or limit the disclosure obligations.
Confidential  Information  that  is  disclosed  as  permitted  by  this  Section  11.3  shall,  provided  that  such  disclosure  to  the  extent
possible does not cause such Confidential Information to become known to the public or become part of the public domain, remain
otherwise subject to the confidentiality

55

and non-use provisions of this Article 11, and the Party disclosing Confidential Information as permitted by this Section 11.3 shall
take all steps reasonably necessary, including obtaining an order of confidentiality and otherwise cooperating with the other Party,
to  ensure  the  continued  confidential  treatment  of  such  Confidential  Information.  For  matters  subject  to  this  Section  11.3.5  and
Section 11.5, Section 11.5 shall control.

2.3.6    if the recipient Party is required to make a disclosure by Law, regulation or legal process, including by the
rules or regulations of any tax authority, the United States Securities and Exchange Commission, or any other similar regulatory
agencies in a country other than the United States or of any stock exchange or other securities trading institution. In such event, a
Party  disclosing  Confidential  Information  of  the  other  Party  under  this  Section  11.3.6  shall  disclose  only  such  Confidential
Information of such other Party as is required to be disclosed.

2.4    Performance; Regulatory Approvals. The Parties expressly agree that Novo shall have access to, and may submit,
Confidential Information of Dicerna to any Regulatory Authority to the extent necessary for obtaining Regulatory Approvals for
Products in the Field, and otherwise disclose Confidential Information concerning Collaboration Targets, Compounds and Products
as it reasonably deems necessary or desirable in connection with Novo’s exercise of its rights and performance of its obligations
under this Agreement consistent with Novo’s usual practices for protecting and disclosing confidential information relating to its
products. The Parties expressly agree that Dicerna may submit Confidential Information of Novo to any Regulatory Authority to
the  extent  necessary  for  obtaining  Regulatory  Approvals  for  Returned  Compounds  and  Products  in  the  Field.  Confidential
Information that is disclosed as permitted by this Section 11.4 shall, provided that such disclosure to the extent possible does not
cause such Confidential Information to become known to the public or become part of the public domain, remain otherwise subject
to the confidentiality and non-use provisions of Article 11, and the Party disclosing Confidential Information as permitted by this
Section 11.4  shall  take  all  steps  reasonably  necessary,  including  obtaining  an  order  of  confidentiality  and  otherwise  cooperating
with the other Party, to ensure the continued confidential treatment of such Confidential Information.

2.5    Disclosure of Agreement. This Agreement and the terms herein shall be considered the Confidential Information of
each of the Parties and shall be treated confidentially by each of the Parties, except that either Party or its Affiliates may disclose
the terms of this Agreement:

(a) to the extent required or advisable to comply with the rules and regulations promulgated by the United States Securities
and Exchange Commission or any equivalent governmental agency in any country in the Territory, provided that such Party shall
submit a confidential treatment request in connection with such disclosure and shall submit with such confidential treatment request
only such redacted form of this Agreement as may be mutually agreed in writing by the Parties;

(b) to external counsel to bona fide prospective Acquirers who would only have access on a need-to-know basis, in a secure
data room (which would contain documents that are water-marked and accessible on a time-stamped basis) following agreement on
all material terms of the prospective transaction and would be restricted from sharing the terms with such counsel’s client, provided
that, either Party may disclose an unredacted form of this Agreement (including the foregoing information regarding Targets and
payments) to the senior management of such prospective Acquirers, but only

56

at  such  time  as  (x)  the  Party  wishing  to  so  disclose  such  information  certifies  in  writing  to  the  other  Party  that  such  Party
reasonably and in good faith believes, that it has reached agreement on all substantial economic terms and that it will execute a
definitive  agreement  with  respect  to  the  proposed  transaction  within  the  following  [*  *  *]  and  (y)  the  prospective  Acquirer  has
executed  a  non-disclosure  agreement  restricting  it  to  use  such  terms  solely  for  purposes  of  evaluating  the  potential  acquisition,
restricting access to such individuals as may need to know the information for such evaluation, and strictly prohibiting disclosure of
such terms by the prospective Acquirer;

(c)  upon  request  from  a  Governmental  Authority  (such  as  tax  authorities),  provided  the  disclosing  Party  uses  reasonable

efforts to ensure the Governmental Authority maintains such terms as confidential;

(d) to applicable licensors, to the extent necessary to comply with the terms of any Third Party license agreement, the rights

under which are sublicensed to the other Party under this Agreement; and,

(e) to the extent necessary to perform obligations or exercise rights under this Agreement, any sublicensee, collaborator or
potential sublicensee or potential collaborator of such Party, provided that (i) any sublicensee, collaborator or potential sublicensee
or collaborator agree in writing to be bound by obligations of confidentiality and non-use no less protective of the disclosing Party
than those set forth in this Agreement; and (ii) the financial terms of this Agreement shall be redacted from any such disclosure of
the terms of this Agreement.

2.6    Breaches of Confidentiality; Assistance in Respect of Same. The recipient Party shall promptly notify the disclosing Party if the recipient Party
becomes aware of any breach of confidence or unauthorized use by any Person to whom the recipient Party has disclosed any Confidential Information. The recipient Party shall give the disclosing

Party all reasonable assistance in connection with any action, demand, claim or proceeding that the disclosing Party may institute against any such person in respect of such disclosure.

2.7    Security. Each Party will make reasonable efforts concerning collection, use, analysis, retention, storage, protection,
security,  transfer,  disclosure,  disposal,  and  other  processing  of  Novo  Confidential  Information  will  comply  with,  and  will  not
violate, any (i) contractual obligation of the Party, (ii) any applicable laws, rules or regulations, including those relating to privacy
and best practice (based on the size and scope of the applicable Party) data security, and/or (iii) internal or external written policy or
privacy  statement  of  such  Party.  Each  Party  has  made  Commercially  Reasonable  Efforts  to  implement  and  maintain  reasonable
administrative, physical, organizational, and technical safeguards sufficient to protect the Confidential Information processed by it,
and  such  safeguards  take  into  account  the  state  of  the  art,  are  sufficient  for  the  risks  posed  to  the  other  Party’s’  Confidential
Information. Each Party will notify the other Party as soon as possible after discovery of any unauthorized access to, or unpermitted
or inappropriate use or disclosure of, the other Party’s Confidential Information. Dicerna shall permit Novo to audit on reasonable
notice and no more often than [* * *], under customary confidentiality obligations, of its compliance with the foregoing industry
standard information technology requirements, to be conducted by Novo or Third Party experts appointed by Novo.

3.    PUBLICATIONS AND PUBLICITY

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3.1    Publications. Notwithstanding anything to the contrary in this Agreement, Novo shall have the right to publish the
results of the R&D Program with respect to the Products, provided that any such publication shall be subject to the prior review of
Dicerna and shall be provided at least [* * *] prior to its submission for publication. Dicerna will use diligent efforts to complete its
review  at  least  [*  *  *]  prior  to  the  intended  publication  date.  Novo  shall:  (a)  delete  from  such  publication  any  of  Dicerna’s
Confidential Information; or, (b) upon a determination that such publication includes patentable material, delay the submission of
such publication or presentation for an additional period of up to [* * *] in order to allow the appropriate Party to pursue patent
protection.

3.2        Publicity.  The  Parties  have  mutually  approved  a  press  release  attached  hereto  as  Exhibit  D  with  respect  to  this
Agreement and either Party may make subsequent public disclosure of the contents of such press release. Subject to the foregoing,
each Party agrees not to issue any press release or other public statement, whether oral or written, disclosing the terms hereof or
any of the activities under the R&D Program conducted hereunder without the prior written consent of the other Party; provided
however, that neither Party will be prevented from complying with any duty of disclosure it may have pursuant to Applicable Laws
or pursuant to the rules of any recognized stock exchange or quotation system subject to the restrictions set forth in Sections 11.3
and 11.5. In the event that Dicerna desires to make a public announcement regarding the achievement of any milestone event under
Section 8.4 or Section 8.5, to the extent reasonably practicable, Dicerna will provide Novo with no less than [* * *] in which to
review and approve such announcement, such approval not to be unreasonably withheld, conditioned or delayed.

4.    HSR FILINGS AND CLOSING

4.1        HSR  Filings.  Promptly  after  the  execution  of  this  Agreement,  both  Parties  shall  file  the  appropriate  notices  with
respect  to  the  transactions  contemplated  hereby  as  promptly  as  reasonably  practicable  with  the  United  States  Federal  Trade
Commission (“FTC”)  and Department of  Justice  (“DOJ”)  under  the  Hart  Scott  Rodino  Antitrust  Improvements  Act  of  1976,  as
amended (“HSR Act”). Each of the Parties shall promptly supply the other with any information that may reasonably be required in
order to effectuate the filings under the HSR Act. Each of the Parties shall notify the other promptly upon receipt from the FTC or
DOJ in connection with any filing made under the HSR Act and of any request for amendments or supplements to any such filings
or of any communications with, and any other inquiries or requests for additional information from, the FTC and DOJ. Each Party
shall  comply  promptly,  in  accordance  with  advice  received  from  counsel,  as  appropriate,  with  any  such  inquiry  or  request,
provided, however, that neither Party shall be required to consent to the divestiture or other disposition of any of its assets or the
assets  of  its  Affiliates  or  to  consent  to  any  other  structural  or  conduct  remedy,  and  each  Party  and  its  Affiliates  shall  have  no
obligation  to  contest,  administratively  or  in  court,  any  ruling,  order  or  other  action  of  the  FTC  or  DOJ  or  any  Third  Party  with
respect to the transactions contemplated by this Agreement. Each Party shall be responsible for paying its own costs and expenses
(including  legal  and  consultants’  fees)  incurred  in  connection  with  obtaining  clearance  of  the  transactions  contemplated  hereby
from the FTC and the DOJ, except that Novo will pay the filing fees incurred by both Parties in connection with the filings required
pursuant to the HSR Act. The Effective Date shall not be deemed to have occurred and this Agreement (other than this Article 13
and Articles 1, 11, 16 and

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19 and Sections 2.4, 2.5 and 17.4) shall not be effective until the HSR Clearance Date. As used herein, the “HSR Clearance Date”
means the earlier of (i) the date on which the FTC or DOJ shall notify the Parties of early termination of the waiting period under
the HSR Act or (ii) the date on which the applicable waiting period under the HSR Act expires; provided, however, that if the FTC
or DOJ commences any investigation by means of a second request or otherwise, HSR Clearance Date means the date on which
any  investigation  opened  by  the  FTC  or  DOJ  has  been  terminated,  without  action  to  prevent  the  Parties  from  implementing  the
transactions  contemplated  by  this  Agreement  with  respect  to  the  United  States.  Notwithstanding  any  other  provisions  of  this
Agreement  to  the  contrary,  either  Party  may  terminate  this  Agreement  effective  upon  Notice  to  the  other  Party  if  the  HSR
Clearance Date has not occurred on or before the date that is [* * *] after the Parties make their respective HSR filings.

4.2        Conduct  Pending  HSR  Clearance  Date.  Between  the  date  of  execution  of  this  Agreement  and  the  earlier  of  the
Effective  Date  or  the  date  of  termination,  each  Party  shall  conduct  its  business  with  respect  to  the  intellectual  property  rights
granted hereunder in the ordinary course, and it will refrain from taking any action or omitting to take any action that would have
the effect of restricting or impairing the rights to be granted to either Party hereunder or preventing either Party’s ability to perform
its obligations under this Agreement.

5.    TERM AND TERMINATION

5.1    Term. Subject to Article 13, the term of this Agreement (the “Term”) will commence on the Signing Date (provided
that this Agreement shall not become effective until the Effective Date, except as otherwise set forth in Section 13.1) and (subject
to  earlier  termination  in  accordance  with  Section  14.3  or  Section  14.2)  will  expire  on  a  Product-by-Product  (other  than  a  Co-
Development  Product)  basis  upon  the  expiration  of  the  Royalty  Term  for  such  Product.  Upon  expiration  (but  not  earlier
termination) of this Agreement with respect to a Product (other than a Co-Development Product), all rights and licenses granted to
Novo hereunder shall become fully paid-up, royalty-free, perpetual and irrevocable with respect to such Product. The Term of this
Agreement shall terminate on a Co-Development Product-by-Co-Development Product basis as set forth in Section 14.2.2.

5.2    Voluntary Termination.

5.2.1    Novo has the right to terminate the Agreement in its entirety or on a Collaboration Target-by-Collaboration
Target,  Compound-by-Compound,  Product-by  Product,  or  (with  respect  to  Co-Development  Products  Directed  to  Collaboration
Targets pursuant to Novo’s exercise of its option under Section 2.3.2 or Section 3.3) Co-Development Product-by-Co-Development
Product basis, without cause and in its sole discretion upon [* * *] prior written notice to Dicerna.

5.2.2    On or after the expiration of the Royalty Term that would have been applicable to a Co-Development Product
if it had continued as a Royalty-bearing Product, either Party may terminate this Agreement with respect to such Co-Development
Product  upon  written  notice  to  the  other  Party.  In  such  event,  rights  to  such  Co-Development  Product  shall  revert  to  the  non-
terminating Party such that (1) if the non-terminating Party is Dicerna, the Co-Development Product shall

59

constitute a Returned Compound and Product under Sections 15.2.2 and 15.2.3, and (2) if the non-terminating Party is Novo, the
provisions of Sections 15.2.2 and 15.2.3 shall apply to the benefit of Novo to the same extent that they are specified to apply to the
benefit of Dicerna and Dicerna shall have the same obligations that Novo is specified as having, mutatis mutandis, provided that
the  exclusive  license  Novo  receives  under  Section  15.2.3  shall  be  under  all  of  the  Licensed  Technology  and  no  negotiation  is
required in order for Novo to receive such license. Notwithstanding the foregoing, the royalties specified under Section 15.2.4 shall
not apply to such reverted Co-Development Product. The Parties shall negotiate in good faith the royalties that will be payable by
the non-terminating Party with respect to the reverted Co-Development Product. If the Parties are unable to agree on such royalties
within [* * *] of the termination, then, at the request of either Party, the dispute shall be decided by binding arbitration as specified
in Section 19.6 with the following modifications:  there  shall  be  only  a  single  arbitrator,  and  within [* * *] after selection of the
arbitrator,  each  Party  shall  submit  to  the  arbitrator,  and  exchange  with  the  other  Party  in  accordance  with  a  procedure  to  be
established  by  the  arbitrator,  its  case  and  proposal  for  a  post-termination  royalty  structure  applicable  to  the  reverted  Co-
Development Product. Within [* * *] after receiving each Party’s case and proposal, the arbitrators shall select, in its entirety and
without modification, solely [* * *] of the [* * *] proposals submitted by the Parties.

5.3    Termination for Cause.

5.3.1    If a Party materially breaches this Agreement, the non-breaching Party may provide the breaching Party with
a  written  notice  specifying  the  nature  of  the  breach  and  stating  its  intention  to  terminate  this  Agreement  with  respect  to  the
Target(s),  Compound(s)  and/or  Product(s)  (as  applicable)  to  which  such  breach  directly  relates  if  such  breach  is  not  cured  as
provided for in this Section 14.3.1. If the material breach is not cured by the allegedly breaching Party within [* * *] in the event of
an undisputed payment default) after the receipt of such notice or if such other breach is curable but cannot be cured within the [* *
*] period (which inability shall not apply to undisputed payment defaults) and the allegedly breaching Party fails to use diligent
efforts to promptly cure such breach, or the allegedly breaching Party fails to dispute the alleged breach, within such [* * *] period,
then in each case the non-breaching Party shall be entitled, without prejudice to any of its other rights under this Agreement, and in
addition  to  any  other  remedies  available  to  it  by  law  or  in  equity,  to  terminate  this  Agreement  with  respect  to  the  Target(s),
Collaboration Targets, Compound(s) and/or Product(s) (as applicable) to which such breach directly relates by providing written
notice to the other Party. If the allegedly breaching Party in good faith disputes such material breach or the failure to cure or remedy
such material breach such Party shall, within [* * *] of receipt of written notice from the other Party of its intention to terminate:
(x) provide written notice of that dispute putting forward in reasonable detail the rationale for disputing the alleged breach to the
notifying Party and (y) initiate expedited arbitration procedures in accordance with Section 19.6, in which case, such termination
shall not be effective until [* * *] after the arbitration award determining that the conditions for termination of this Section 14.2 are
met;  provided  further  that  the  breach  is  not  cured  within  such  [*  *  *]  period.  During  the  pendency  of  any  such  arbitration  the
Parties  shall  continue  performing  their  respective  obligations,  and  exercising  their  respective  rights,  under  this  Agreement.  The
Parties  hereby  agree  to  take  such  steps  as  may  be  reasonably  necessary  to  complete  such  arbitration  process  as  expeditiously  as
possible given the circumstances.

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5.3.2        In  the  event  that  Dicerna  or  any  of  its  Affiliates  commences  a  declaratory  judgment  action,  inter  partes
review,  post-grant  review,  opposition  or  similar  proceeding  to  challenge  the  validity  or  enforceability  of  any  Product-Specific
Patents, other than in response to a threat of an infringement claim or as necessary to secure allowance of a Novo-owned patent
claim, such Patent Right shall no longer be a royalty-bearing Product-Specific Patent (but shall otherwise remain a Licensed Patent
Right).

5.3.3    In the event that Novo or any of its Affiliates commences a declaratory judgment action, inter partes review,
post-grant review, opposition or similar proceeding to challenge the validity or enforceability of any Licensed Patent Right, other
than in response to a threat of an infringement claim or as necessary to secure allowance of a Dicerna-owned patent claim, and such
action does not result in a declaration or ruling that the challenged Licensed Patent Right is invalid or unenforceable, Novo shall
reimburse Dicerna for its out-of-pocket costs of defending such action and the Royalty rate on Products Covered by the challenged
Licensed Patent Right shall be increased by [* * *] of the otherwise applicable Royalty rate set forth in Section 8.6.

5.3.4        In  the  event  of  any  failure  to  make  timely  and  complete  payments  by  either  Party  under  Section  5.4,
including  for  Dicerna  any  adjustments  of  the  Co-Development  Percentage,  the  other  Party  shall  have  the  right  to  terminate  the
relevant Co-Development Program.

5.4    Alternative to Termination. To the extent either Party acquires any right to terminate this Agreement with respect to any Target, Collaboration Target, Compound
or Product (including Co-Development Targets and Co-Development Products) or Product-Specific Patent under Section 14.3.1, the non-breaching Party may, in lieu of such termination and without

limiting any other rights and remedies, elect for this Agreement to continue in full force and effect with respect to such Target, Collaboration Target, Compound, Product or Product-Specific Patent

(as applicable); provided, however, that in the event Novo acquires such termination right due to Dicerna’s breach of any of its obligations under Sections 3.1 and 3.2, Novo shall have the additional

right, at its election upon notice to Dicerna, to either (a) have any and all amounts thereafter payable by Novo hereunder relating to or in any way connected with the applicable Target, Collaboration

Target,  Compound  or  Product,  or  the  Product(s)  Covered  by  the  applicable  Product-Specific  Patent,  for  which  Novo  made  such  election  under  this  Section 14.4  reduced  by  [*  *  *]  or  (b)  seek

damages through dispute resolution in accordance with Section 19.6. With respect to any such reduction relating to a Co-Development Product, Dicerna’s obligation to pay Post-Option Development

Expenses shall also be reduced by [* * *]. For the avoidance of doubt, the non-breaching Party acquiring a right to terminate is not required to choose between exercising such termination right and

such reduction right, and if the non-breaching Party elects to terminate this Agreement it may also seek damages through dispute resolution in accordance with Section 19.6.

6.    EFFECTS OF TERMINATION

6.1    Termination of Agreement. If this Agreement terminates in full for any reason other than expiration, then no later
than [* * *] after the effective date of such termination, Novo shall pay all amounts then due and owing (except that Novo shall
have the right to offset any undisputed monies owed to Novo by Dicerna, if any) as of the termination date and each Party shall
return or cause to be returned to the other Party, or destroy, the other Party’s Confidential Information and all copies thereof unless
such Confidential Information are included within the scope of any ongoing license under Section 15.2.3; provided, however, that
each Party may keep [* * *] copy of the other Party’s Confidential Information in its confidential files for record purposes and such
copy shall remain subject to Article 11 of this Agreement. In the event of termination of this Agreement, except as expressly set
forth otherwise in this Agreement (including under the surviving provisions set forth in Section 15.3),  the  rights  and  obligations
(including  the  licenses  granted  under  Article 7,  except  for  the  mutual  use  of  Confidential  Information  under  Section  7.6,  which
shall survive) of the Parties hereunder shall terminate as of the date of such termination.

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6.2    Target/Product Return.

6.2.1       Upon  any  Target  becoming  a  Discontinued  Target,  voluntary  termination  of  this  Agreement  in  its  entirety
under Section 14.2 or with respect to particular Compounds, Products or Collaboration Targets under Section 14.2 or Section 14.3,
any  license  rights  granted  by  Dicerna  to  Novo  to  the  Discontinued  Target  or  affected  Products,  as  applicable,  (or  rights  to  all
Collaboration Targets in the event of the termination of this Agreement as a whole) shall cease and revert to the respective Parties.
For purposes of this Section 15.2, “Returned Compounds and Products” shall mean, in the case of a Collaboration Target or Co-
Development Target becoming a Discontinued Target, all Product(s) and Compound(s) then being Developed under this Agreement
that are Directed To such Discontinued Target(s). Discontinued Targets and Returned Compounds and Products will no longer be
subject to Sections 3.1 and 3.2. If this Agreement is terminated by either Party pursuant to Section 13.1, the Parties acknowledge
and agree that (a) no Target shall ever have been deemed to be a Collaboration Target, (b) the licenses herein shall be deemed to
have never granted and (c) neither Party shall have been subject to any exclusivity obligations.

6.2.2    Novo shall, at Dicerna’s request, transfer to Dicerna the following items with respect to Returned Compounds
and  Products,  to  the  extent  necessary  and  to  the  extent  used  by  Novo  (as  of  the  date  of  termination)  for  the  Development,
registration, Manufacture (including formulation), use, or Commercialization of the Returned Compounds and Products: all clinical
and regulatory correspondence; all Regulatory Approvals held by Novo or its Affiliates; all data and results arising from Novo’s
Development  or  Commercialization  of  the  Compounds  and  Products  corresponding  to  the  Returned  Compounds  and  Products,
including the trial master file, the clinical database and the safety database; and solely related to the Compounds and Products that
are  transferable  by  Novo  or  its  Affiliates  to  Dicerna;  provided,  however,  that  Novo  shall  have  the  right  to  retain  copies  of  the
foregoing information and documentation and information and documentation generally. Dicerna shall (i) reimburse Novo for its
reasonable out-of-pocket costs associated with such transfer, as defined in an invoice to be provided by Novo to Dicerna promptly
following the effective date of termination in the event of a termination by Novo for Dicerna’s material breach pursuant to Section
14.3; and (ii) assume financial responsibility for such items from the date of transfer to Dicerna. All Confidential Information of
Novo  relating  to  the  items  transferred  pursuant  hereto  shall  become  joint  Confidential  Information  following  such  transfer;
provided that Dicerna shall have the right to use and disclose such Confidential Information as it reasonably deems necessary or
desirable  in  connection  with  research,  development  and  commercialization  of  Returned  Compounds  and  Products  incorporating
such  Confidential  Information  consistent  with  Dicerna’s  usual  practices  for  protecting  and  disclosing  confidential  information
relating to its products.

6.2.3        [*  *  *].  The  Parties  will  agree  in  good  faith  regarding  a  technology  transfer  plan  to  facilitate  Dicerna’s
practice of the foregoing licenses, which plan will provide for reasonable reimbursement to Novo for Novo’s actual internal and
out-of-pocket  costs  and  expenses,  except  in  the  event  Dicerna  terminates  pursuant  to  Section 14.3  (in  which  case  the  costs  and
expenses of such transfer shall be borne by Novo), and Dicerna shall be solely responsible, in its discretion, for the prosecution,
maintenance, defense and enforcement or all Product-Specific Patents and Novo Product Patents. Any sublicense granted by Novo
or  its  Affiliate  to  a  Third  Party  under  the  license  granted  under  Section  7.1  shall  survive  the  termination  of  this  Agreement,
provided that, in the case

62

where termination of this Agreement for Novo’s uncured material breach pursuant to Section 14.3, such sublicensee did not cause
such uncured material breach. If permitted under such a surviving sublicense, effective upon termination of this Agreement, such
sublicense shall become a direct license from Dicerna to such sublicensee; provided, that, if assignment of the sublicense or such
conversion of the sublicense to a direct license is not permitted under the applicable sublicense, Novo shall be entitled to retain its
right to payment thereunder and shall remain liable for Royalties under Section 8.6 of this Agreement with respect to sales by such
sublicensee.  If  Novo  will  be  required  to  pay  a  Third  Party  licensing  fees  based  on  the  grant  of  a  sublicense  to  Dicerna  of  the
applicable  intellectual  property,  Novo  shall  notify  Dicerna  of  such  requirement  in  advance  and  Dicerna  shall  have  the  option  of
either  not  receiving  such  sublicense  or  of  receiving  such  sublicense  and  becoming  responsible  for  the  licensing  fees  and  other
payments that become payable as a result of such sublicense to Dicerna. In addition, if Dicerna reasonably believes that Dicerna
requires  a  license  under  Novo  Background  IP  in  order  to  Develop  or  Commercialize  Returned  Compounds  and  Products  and
requests  that  Novo  negotiate  with  Dicerna  a  license  under  such  Novo  Background  IP  for  such  Development  and
Commercialization, Novo shall negotiate in good faith with Dicerna with respect to such requested license.

6.2.4    [* * *].

6.2.5    For clarity, with the exception of applicable obligations under this Section 15.2 and without limiting Section
15.4  and  unless  expressly  agreed  otherwise,  all  obligations  of  the  Parties  with  respect  to  the  Research,  Development  and
Commercialization of the Collaboration Targets, Compounds, and Products shall terminate on the date of notice of termination of
this Agreement.

6.3    Survival. Termination or expiration of this Agreement shall not relieve Novo or Dicerna of any obligation accruing
prior to such termination/expiration, nor affect in any way the survival of any other right, duty or obligation of Novo or Dicerna
which is expressly stated elsewhere in this Agreement to survive such termination. Without limiting the foregoing and except as
expressly  set  forth  otherwise  in  this  Agreement,  Article  1  (for  definitional  purposes),  Articles  8  and  9  (to  the  extent  that  any
amounts payable accrued prior to the effective date of such expiration/termination and remain unpaid), Article 11, Article 15  and
Article 17 (to the extent and with respect to claims accruing or arising prior to the effective date of such termination), Article 18 (to
the extent arising prior to the effective date of termination) and Section 2.4 (but only with respect to information disclosed prior to
the notice of termination), Section 8.6 (but only applicable with respect to sublicenses surviving termination (not an expiration) as
described in Section 15.2.3 and further, only after First Commercial Sale of a Product and to the extent such sublicensee continues
to  Develop  or  Commercialize  a  Product  that  triggers  such  payment  obligations  during  the  Royalty  Term),  Sections  10.1,  10.3
through 10.6, 10.7.3, 10.8, 10.11, and 10.12 (but only to the extent and with respect to intellectual property generated/developed
prior  to  the  effective  date  of  such  termination),  and  Sections  2.3.5,  3.4  (to  the  extent  any  Compounds,  Products,  Collaboration
Targets  or  Co-Development  Products  are  still  being  Researched,  Developed  or  Commercialized),  4.6.1,  7.6,  7.7,  7.8,  9.4,  9.5,
10.7.1, 10.13, 12.2, 14.1, 14.2.2, 15.2, and 16.3 shall survive termination, and Sections 19.1, 19.3 through 19.23 shall survive to the
extent applicable. Except as otherwise expressly

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provided herein, all other rights and obligations of the Parties under this Agreement shall terminate upon termination/expiration of
this Agreement.

6.4       Termination  Not  Sole  Remedy. Termination  of  this  Agreement  is  not  the  sole  remedy  under  this  Agreement  and,
whether or not termination is effected, all other remedies will remain available (except as Novo and Dicerna have expressly agreed
to otherwise herein) and such termination shall not preclude Novo and Dicerna from claiming any other damages, compensation or
relief that it may be entitled to upon such termination.

6.5        Bankruptcy  Code.  If  this  Agreement  is  rejected  by  a  Party  as  a  debtor  under  Section  365  of  the  United  States
Bankruptcy Code or similar provision in the bankruptcy laws of another jurisdiction (the “Code”), then, notwithstanding anything
else in this Agreement to the contrary, all licenses and rights to licenses granted under or pursuant to this Agreement by the Party in
bankruptcy  to  the  other  Party  are,  and  shall  otherwise  be  deemed  to  be,  for  purposes  of  Section  365(n)  of  the  Code  (or  similar
provision in the bankruptcy laws of the jurisdiction), licenses of rights to “intellectual property” as defined under Section 101(35A)
of the Code (or similar provision in the bankruptcy laws of another applicable jurisdiction). The Parties agree that a Party that is a
licensee of rights under this Agreement shall retain and may fully exercise all of its rights and elections under the Code, and that
upon  commencement  of  a  bankruptcy  proceeding  by  or  against  a  Party  under  the  Code,  the  other  Party  shall  be  entitled  to  a
complete  duplicate  of,  or  complete  access  to  (as  such  other  Party  deems  appropriate),  any  such  intellectual  property  and  all
embodiments of such intellectual property, if not already in such other Party’s possession, shall be promptly delivered to such other
Party (a) upon any such commencement of a bankruptcy proceeding upon written request therefor by such other Party, unless the
bankrupt Party elects to continue to perform all of its obligations under this Agreement or (b) if not delivered under the foregoing
subclause (a), upon the rejection of this Agreement by or on behalf of the bankrupt Party upon written request therefor by the other
Party. The foregoing provisions of this Section 15.5 are without prejudice to any rights a Party may have arising under the Code.

7.    REPRESENTATIONS AND WARRANTIES

7.1    Representations and Warranties by Each Party. Each Party represents and warrants to the other as of the Signing

Date that:

7.1.1    Good Standing. It is a corporation duly organized, validly existing under the laws of the jurisdiction of its

incorporation, and in good standing under the laws of its jurisdiction of formation;

7.1.2    Authority and Capabilities. It has: (a) full corporate power and authority to execute, deliver, and perform
this  Agreement;  (b)  taken  all  corporate  action(s)  required  by  Applicable  Laws  and  its  organizational  documents  to  authorize  the
execution  and  delivery  of  this  Agreement,  and  the  consummation  of  the  transactions  and  performance  of  its  obligations
contemplated by this Agreement; and, (c) sufficient facilities, experienced personnel or other capabilities (including via Affiliates
and/or Third Parties) to enable it to perform its obligations under this Agreement;

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7.1.3    Valid and Binding. This Agreement constitutes a legal, valid and binding agreement enforceable against it in
accordance  with  its  terms  (except  as  the  enforceability  thereof  may  be  limited  by  bankruptcy,  bank  moratorium  or  similar  laws
affecting  creditors’  rights  generally  and  laws  restricting  the  availability  of  equitable  remedies  and  may  be  subject  to  general
principles of equity whether or not such enforceability is considered in a proceeding at law or in equity);

7.1.4    No Conflict. The execution and delivery of this Agreement and all other instruments and documents required
to be executed pursuant to this Agreement, and the consummation of the transactions contemplated hereby do not and shall not: (a)
conflict with or result in a breach of any provision of its organizational documents; (b) result in a breach of any agreement to which
it is a party; or, (c) violate any Applicable Laws;

7.1.5    Absence of Debarment. Neither Party, its officers, employees, agents, consultants or any other person used
by such Party in the performance of the respective Research and Development activities under the R&D Program has been or is: (a)
debarred, convicted, or is subject to a pending debarment or conviction, pursuant to section 306 of the United States Federal Food,
Drug,  and  Cosmetic  Act  (“FFDCA”),  44  U.S.C.  §  335a;  (b)  listed  by  any  government  or  regulatory  agencies  as  ineligible  to
participate  in  any  government  healthcare  programs  or  government  procurement  or  non-procurement  programs  (as  that  term  is
defined  in  42  U.S.C.  1320a-7b(f)),  or  excluded,  debarred,  suspended  or  otherwise  made  ineligible  to  participate  in  any  such
program; or, (c) convicted of a criminal offense related to the provision of healthcare items or services, or is subject to any such
pending action. A Party agrees to inform the other Party in writing promptly if a Party or any person who is performing activities
under  the  R&D  Program  is  subject  to  the  foregoing,  or  if  any  action,  suit,  claim,  investigation,  or  proceeding  relating  to  the
foregoing is pending, or to the best of such Party’s knowledge, is threatened.

7.1.6        Regulatory  Documentation.  With  respect  to  the  Product(s),  each  Party  and  its  Affiliates  shall  generate,
prepare,  maintain  and  retain  all  Regulatory  Documentation  that  is  required  to  be  maintained  or  retained  by  such  Party  and  its
Affiliates pursuant to and in accordance with, to the extent applicable, good laboratory and clinical practice and Applicable Law
and  all  such  information  shall  be  true,  complete  and  correct  in  all  material  respects  and  what  it  purports  to  be.  “Regulatory
Documentation” means: all (i) applications (including all INDs and applications for Regulatory Approval), registrations, licenses,
authorizations  and  approvals  (including  Regulatory  Approvals);  (ii)  correspondence  and  reports  submitted  to  or  received  from
Regulatory  Authorities  (including  minutes  and  official  contact  reports  relating  to  any  communications  with  any  Regulatory
Authority)  and  all  supporting  documents  with  respect  thereto,  including  all  adverse  event  files  and  complaint  files;  (iii)
supplements or changes to any of the foregoing following Regulatory Approval; and (iv) clinical and other data, including Clinical
Trial data, contained or relied upon in any of the foregoing; in each case ((i), (ii), (iii) and (iv)) relating to the Product(s) Directed
To a Collaboration Target.

7.1.7    Assignment by Employees, Agents and Consultants. All employees and agents of, and consultants to, each
Party or its Affiliates are obligated to assign to such Party or its Affiliate their rights in and to any inventions arising out of their
work at such Party or its Affiliate either pursuant to written agreement or by operation of law.

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7.1.8        Actions  Regarding  Regulatory  Authorities.  Neither  Party  nor  any  of  its  Affiliates,  nor  any  of  its  or  their
respective officers, employees or agents has: (i) committed (or after the Signing Date, will commit) an act, (ii) made (or after the
Signing Date, will make) a statement or (iii) failed (or after the Signing Date, will fail) to act or make a statement that, in any case
((i),  (ii)  (iii)),  that  (x)  would  be  or  create  an  untrue  statement  of  material  fact  or  fraudulent  statement  to  the  FDA  or  any  other
Regulatory Authority with respect to the Commercialization of Products or (y) could reasonably be expected to provide a basis for
the FDA to invoke its policy respecting “Fraud, Untrue Statements of Material Facts, Bribery and Illegal Gratuities”, set forth in 56
Fed. Reg. 46191 (September 10, 1991) and any amendments thereto or any analogous laws or policies in the Territory, with respect
the Commercialization of Compounds or Products.

7.1.9    Limitation. Neither Party nor its Affiliates makes any representation or warranty, either express or implied,
that any of the R&D Program, Research, Development and/or Commercialization efforts with regard to any Compound or Product
will be successful.

7.2        Representations,  Warranties  and  Covenants  by  Dicerna.  Dicerna  represents,  warrants  and,  as  applicable,

covenants, to Novo as follows:

7.2.1    No Targets Encumbered. As of the Signing Date, the Blocked Target List is comprised of only the Blocked

Targets disclosed pursuant to Section 2.3.1.

7.2.2    No Conflict with this Agreement. Neither Dicerna nor any of its Affiliates has granted, nor will Dicerna or
its Affiliates grant during the Term, any rights (or other encumbrances) to any Third Party to Licensed Technology that conflict
with the rights assigned and/or granted to Novo hereunder. Dicerna has Control over all Know-How and Patent Rights owned by it
or  its  Affiliates  as  of  the  Signing  Date  that  are  necessary  or  reasonably  useful  to  the  Research,  Development,  registration,
manufacturing (including formulation) or Commercialization of the Compounds and Products as known to be contemplated by this
Agreement as of the Signing Date. Dicerna shall ensure that: (a) all Know-How relating to, and Patent Rights directed to (i) the
GalXC  Platform  or  (ii)  Compounds  and  Products,  necessary  or  reasonably  useful  to  Research,  Develop,  register,  Manufacture
(including  formulate),  use  or  Commercialize  Compounds  or  Products  in  the  Field  in  the  Territory;  and  (b)  all  Improvements  to
Licensed Technology; in each case of (a) and (b) solely conceived, developed, created, made or reduced to practice by Dicerna or
its Affiliates and not subject to Third Party rights under existing agreements, except for the Blocked Targets and Targets subject to
the Excluded Field due to exclusivity obligations granted under the Lilly Agreement consistent with this Section 16.2.2, are upon
creation and remain thereafter Controlled by Dicerna. Neither Dicerna, nor any of its Affiliates, will enter into any agreement after
the date of execution of this Agreement conflicting with the foregoing. Neither Dicerna nor any of its Affiliates will assign, divest
or  otherwise  transfer  any  of  the  Licensed  Technology  in  a  manner  that  would  adversely  affect  Novo’s  rights  hereunder.  Neither
Dicerna  nor  any  of  its  Affiliates  has,  in  anticipation  of  this  Agreement  or  one  of  a  similar  nature,  participated  in,  or  agreed  or
planned  to  participate  in,  any  transaction  or  series  of  transactions  where  the  intent  or  result  of  such  transaction(s)  is  (or  was)  to
avoid extending to Novo or its Affiliates any benefits of this Agreement that Novo and its Affiliates otherwise would have enjoyed,
and Dicerna shall

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not, and shall cause its Affiliates not to, participate in, or agree or plan to participate in, any such transaction following the Signing
Date.

7.2.3    Existing Patent Rights.

(a)    All Patent Rights contained in the Licensed Technology existing as of the Signing Date that are
issued or subject to a pending application for issuance (the “Existing Patents”) are listed on Exhibit E and all such
Existing  Patents  are,  as  of  the  Signing  Date:  (i)  to  the  extent  issued  (unless  otherwise  indicated  on  Exhibit  E),
subsisting and, to Dicerna’s knowledge, not invalid or unenforceable; (ii) except for the Blocked Targets or Targets
subject  to  the  Excluded  Field  due  to  the  exclusivity  obligations  granted  under  the  Lilly  Agreement,  solely  and
exclusively owned or exclusively licensed to Dicerna in the Field in the Territory, free of any encumbrance, lien or
claim  of  ownership  by  any  Third  Party;  (iii)  to  the  extent  subject  to  a  pending  application  for  issuance,  being
prosecuted in the respective patent offices in which such applications have been filed in accordance with Applicable
Law and Dicerna’s ordinary patent prosecution practices and Dicerna and its Affiliates have presented all relevant
references,  documents  and  information  of  which  it  and  the  inventors  are  aware  and  which  is  advisable  based  on
advice from patent counsel to the relevant patent examiner at the relevant patent office; and (iv) filed and maintained
properly and all applicable fees applicable thereto have been paid on or before the due date for payment.

(b)    As of the Signing Date, to Dicerna’s Knowledge, neither Dicerna nor any of its Affiliates have

taken any action that would render any Invention claimed in the issued Existing Patents unpatentable.

(c)    The Existing Patents represent all Patent Rights Controlled by Dicerna or their Affiliates as of
the Signing Date that are necessary or reasonably useful for the Research, Development, or Commercialization of
the Compounds and Products as known to be contemplated by this Agreement as of the Signing Date. To Dicerna’s
knowledge, as of the Signing Date, no rights or licenses are required under any Third Party Patent Rights or Know-
How  for  Novo  to  Research,  Develop,  Manufacture  (including  to  formulate)  or  Commercialize  the  Products  as
contemplated herein as of the Signing Date other than those granted under Section 7.1.

(d)    There is no license or other right granted by Dicerna or any of its Affiliates to any Third Party,
or any agreement with a Third Party to which Dicerna or any of its Affiliates is a party, that would cause any Patent
Right or Know-How generated by or on behalf of Dicerna or any of its Affiliates in the conduct of activities under
this Agreement to fail to be Licensed Technology by depriving Dicerna of Control of such Patent Right or Know-
How in the Field.

7.2.4        Litigation  and  Actions  Relating  to  Intellectual  Property.  As  of  the  Signing  Date:  (a)  Dicerna  has  not

received any written notice of any threatened claims or litigation seeking

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to invalidate or otherwise challenge the Licensed Technology, including the Licensed Patent Rights, or Dicerna’s or its Affiliates’
rights,  therein;  and  (b)  Dicerna  is  not  aware  of  any  pending  or  threatened  action,  suit,  proceeding  or  claim  by  a  Third  Party
asserting that Dicerna or its Affiliates is infringing or has misappropriated or otherwise is violating any Patent Right, trade secret or
other proprietary right of any Third Party as would reasonably be expected to impair in any material respect the ability of it or its
Affiliates to fulfill any of its obligations under this Agreement.

7.2.5    Other Material Claims and Actions. As of the Signing Date, there are no claims, actions, or proceedings
pending or, to Dicerna’s of its Affiliates’ knowledge, threatened; nor, to Dicerna’s or its Affiliates’ knowledge, are there any formal
inquiries initiated or written notices received for any such legal proceedings, in each case (or in aggregate) against Dicerna or its
Affiliates  or  their  properties,  assets  or  businesses,  which  if  adversely  decided,  would,  individually  or  in  the  aggregate,  have  a
material adverse effect on, or prevent Dicerna’s or its Affiliates’ ability to conduct the R&D Program or to grant the licenses or
rights granted under this Agreement.

7.2.6    No Government Funding. The Inventions claimed by the Existing Patents as of the Signing Date: (i) were
not conceived, discovered, developed or otherwise made in connection with any research activities funded, in whole or in part, by
the federal government of the United States of America or any agency thereof and (ii) are not a “subject invention” as that term is
described  in  35  U.S.C.  Section  201(e)  and  (iii)  are  not  otherwise  subject  to  the  provisions  of  the  Patent  and  Trademark  Law
Amendments  Act  of  1980,  as  amended,  codified  at  35  U.S.C.  §§  200-212,  as  amended,  as  well  as  any  regulations  promulgated
pursuant thereto, including in 37 C.F.R. Part 401.

7.3        No  Other  Warranties.  Except  as  otherwise  expressly  set  forth  in  this  Agreement,  each  Party  and  its  Affiliates
expressly  disclaim  any  and  all  representations  or  warranties  of  any  kind  with  respect  to  the  subject  matter  of  this  Agreement,
whether express or implied, including any warranties of non‑infringement, merchantability or fitness for a particular purpose.

8.    INDEMNIFICATION AND LIABILITY

8.1    Indemnification by Dicerna. Dicerna shall indemnify, defend and hold Novo and its Affiliates, and their respective
officers,  directors,  employees  and  agents  (each,  a  “Novo  Indemnified  Party”),  harmless  from  and  against  losses,  settlements,
penalties,  fines,  costs  or  expenses,  damages  and  liability,  including  reasonable  legal  expense  and  attorneys’  fees,  (collectively,
“Losses”)  to  which  any  Novo  Indemnified  Party  may  become  subject  as  a  result  of  any  Third  Party  demands,  suits,  claims  or
actions  (“Claims”)  against  any  Novo  Indemnified  Party  (including  product  liability  claims)  arising  or  resulting  from:  (a)  the
Research,  Development,  Manufacture  (including  formulation),  Commercialization  or  other  exploitation  of  the  Dicerna  Orphan
Products and Returned Compounds and Products pursuant to this Agreement by or on behalf of Dicerna or its Affiliates; (b) the
negligence  or  willful  misconduct  of  Dicerna  or  its  Affiliates  pursuant  to  this  Agreement;  (c)  the  breach  of  any  term  in  or  the
covenants,  warranties,  representations  made  by  Dicerna  to  Novo  under  this  Agreement;  (d)  misappropriation  of  a  Third  Party’s
Know-How  to  the  extent  such  misappropriation  arises  from  Novo’s,  its  Affiliate’s  or  its  or  their  sublicensees’  use  hereunder  of
materials  provided  by  a  Dicerna  Indemnified  Party  hereunder.  Dicerna  is  only  obliged  to  so  indemnify  and  hold  the  Novo
Indemnified Parties harmless to the extent that such

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Claims: (i) do not arise from any breach of this Agreement or the negligence or willful misconduct of a Novo Indemnified Party
and/or (ii) are not subject to indemnification by Novo under Section 17.2.

8.2        Indemnification  by  Novo.  Novo  shall  indemnify,  defend  and  hold  Dicerna  and  its  Affiliates,  and  their  respective
officers, directors, employees and agents (each, a “Dicerna Indemnified Party”), harmless from and against Losses incurred by
any  Dicerna  Indemnified  Party  as  a  result  of  any  Third  Party  Claims  against  any  Dicerna  Indemnified  Party  (including  product
liability claims) arising or resulting from: (a) the Research, Development, Manufacture (including formulation), Commercialization
or other exploitation of the Compounds and Products (but not the Co-Development Products) pursuant to this Agreement by or on
behalf  of  Novo  or  its  Affiliates  (other  than  to  the  extent  Dicerna  or  its  Affiliates  are  carrying  out  work  on  behalf  of  Novo,  but
subject  to  subclause  (d)),  (b)  the  negligence  or  willful  misconduct  of  Novo  or  its  Affiliates  pursuant  to  this  Agreement;  (c)  the
breach  of  any  term  in  or  the  covenants,  warranties,  representations  made  by  Novo  to  Dicerna  under  this  Agreement  or  (d)
misappropriation of a Third Party’s Know-How to the extent such misappropriation arises from Dicerna’s, its Affiliate’s or its or
their  sublicensees’  use  hereunder  of  materials  provided  by  a  Novo  Indemnified  Party  hereunder.  Novo  is  only  obliged  to  so
indemnify and hold the Dicerna Indemnified Parties harmless to the extent that such Claims: (i) do not arise from any breach of this
Agreement or the negligence or willful misconduct of a Dicerna Indemnified Party and/or (ii) are not subject to indemnification by
Dicerna under Section 17.1.

8.3    Indemnification Procedure.

8.3.1 

  Any  Novo  Indemnified  Party  or  Dicerna  Indemnified  Party  seeking  indemnification  hereunder
(“Indemnified  Party”)  shall  notify  the  Party  against  whom  indemnification  is  sought  (“Indemnifying  Party”)  in  writing
reasonably  promptly  after  the  assertion  against  the  Indemnified  Party  of  any  Claim  in  respect  of  which  the  Indemnified  Party
intends to base a claim for indemnification hereunder, but the failure or delay so to notify the Indemnifying Party shall not relieve
the  Indemnifying  Party  of  any  obligation  or  liability  that  it  may  have  to  the  Indemnified  Party  except  to  the  extent  that  the
Indemnifying Party demonstrates that its ability to defend or resolve such Claim is adversely affected thereby.

8.3.2        Subject  to  the  provisions  of  Section  17.3.3,  the  Indemnifying  Party  shall  have  the  right,  upon  providing
notice to the Indemnified Party of its intent to do so within [* * *] after receipt of the notice from the Indemnified Party of any
Claim, to assume the defense and handling of such Claim, at the Indemnifying Party’s sole expense. If the Indemnifying Party does
not assume control of such defense, or does not comply with its obligations under Section 17.3.3, the Indemnified Party shall be
entitled to control the defense and handling of the Claim at the Indemnifying Party’s sole expense.

8.3.3    If the Indemnifying Party elects to assume the defense and handling of the Claim: (a) the Indemnifying Party
shall select competent counsel in connection with conducting the defense and handling of such Claim, and the Indemnifying Party
shall defend or handle the same in consultation with the Indemnified Party, and shall keep the Indemnified Party timely apprised of
the status of such Claim; (b) the Indemnifying Party shall not, without the prior written consent

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of the Indemnified Party, agree to a settlement of any Claim which could lead to liability or create any financial or other obligation
on the part of the Indemnified Party for which the Indemnified Party is not entitled to indemnification hereunder, or would involve
any  admission  of  wrongdoing  on  the  part  of  the  Indemnified  Party;  and  (c)  the  Indemnified  Party  shall  cooperate  with  the
Indemnifying  Party,  at  the  request  and  expense  of  the  Indemnifying  Party,  shall  be  entitled  to  participate  in  the  defense  and
handling of such Claim with its own counsel and at its own expense, and shall not agree to any settlement of the Claim without the
prior  written  consent  of  the  Indemnifying  Party  if  there  is  any  liability  or  any  financial  or  other  obligation  on  the  part  of  the
Indemnifying Party or if it would adversely affect the Indemnifying Party.

INDIRECT, 

8.4    SPECIAL, INDIRECT, AND OTHER LOSSES. NEITHER PARTY NOR ANY OF ITS AFFILIATES SHALL
BE  LIABLE  UNDER  THIS  AGREEMENT  FOR  SPECIAL, 
INCIDENTAL,  PUNITIVE  OR
CONSEQUENTIAL  DAMAGES,  INCLUDING  LOSS  OF  PROFITS  SUFFERED  BY  THE  OTHER  PARTY,  EXCEPT
FOR:  (A)  LIABILITY  FOR  BREACH  OF  ARTICLE  7;  (B)  DAMAGES  REQUIRED  TO  BE  PAID  TO  (I)  A  THIRD
PARTY  PURSUANT  TO  A  NON-APPEALABLE  ORDER  OF  A  COURT  OF  COMPETENT  JURISDICTION  IN
CONNECTION  WITH  A  THIRD  PARTY  CLAIM  FOR  WHICH  THE  INDEMNIFIED  PARTY  IS  ENTITLED  TO
INDEMNIFICATION HEREUNDER OR (II) A PARTY PURSUANT TO A NON-APPEALABLE ORDER OF A COURT
OF  COMPETENT  JURISDICTION  IN  CONNECTION  WITH  A  VIOLATION  OF  PATENT  RIGHTS  OR  OTHER
INTELLECTUAL PROPERTY RIGHTS; (C) SUCH DAMAGES ARISING OUT OF ANY BREACH OF SECTIONS 3.1
OR 3.2 OR 3.4 OR ARTICLE 11  OF  THIS  AGREEMENT  BY  A  PARTY,  ITS  AFFILIATES  OR  SUBLICENSEES;  OR
(D)  SUCH  DAMAGES  ARISING  OUT  OF  THE  GROSS  NEGLIGENCE  OR  WILLFUL  MISCONDUCT  OF  THE
LIABLE PARTY.

8.1    Insurance. [* * *].

9.    COMPLIANCE

9.1    Compliance with this Agreement. Each of the Parties shall, and shall (to the extent applicable) cause their respective

Affiliates to, comply in all material respects with the terms of this Agreement.

9.1    Compliance with Party Specific Regulations. In carrying out their respective obligations under this Agreement, the
Parties  agree  to  cooperate  with  each  other  as  may  reasonably  be  required  to  help  ensure  that  each  is  able  to  fully  meet  its
obligations with respect to the Party Specific Regulations applicable to it. Neither Party shall be obligated to pursue any course of
conduct that would result in such Party being in material breach of any Party Specific Regulation applicable to it; provided that in
the event that a Party refuses or is unable to fulfill its obligations under this Agreement in any material respect on such basis, the
other  Party  shall  (without  derogation  to  any  other  available  rights  and  remedies)  have  the  right  to  terminate  this  Agreement  in
accordance with Section 14.3. All Party Specific Regulations are binding only in accordance with their terms and only upon the
Party to which they relate.

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9.2        Compliance  with  Internal  Compliance  Codes.  Except  as  expressly  set  forth  in  this  Agreement,  all  Internal
Compliance Codes shall apply only to the Party to which they relate. The Parties agree to cooperate with each other to help insure
that each Party is able to comply with the substance of its respective Internal Compliance Codes and, to the extent practicable, each
Party shall operate in a manner consistent with its Internal Compliance Codes applicable to its performance under this Agreement.

9.3        Compliance  with  Anti-Corruption  Laws.  In  connection  with  this  Agreement,  the  Parties  shall  comply  with  all
applicable local, national, and international laws, regulations, and industry codes dealing with government procurement, conflicts
of interest, corruption or bribery, including, if applicable, the US Foreign Corrupt Practices Act of 1977, as amended, and any laws
enacted to implement the Organization of Economic Cooperation and Development Convention on Combating Bribery of Foreign
Officials in International Business Transactions.

9.4    Prohibited Conduct. Without limiting the other obligations of the Parties set forth in this Article 18, in connection
with any activities of the Parties under this Agreement, the Parties confirm that they have not made, offered, given, promised to
give,  or  authorized,  and  will  not  make,  offer,  give,  promise  to  give,  or  authorize,  any  bribe,  kickback,  payment  or  transfer  of
anything of value, directly or indirectly, to any person or to any Government Official for the purpose of: (i) improperly influencing
any act or decision of the person or Government Official; (ii) inducing the person or Government Official to do or omit to do an act
in  violation  of  a  lawful  or  otherwise  required  duty;  (iii)  securing  any  improper  advantage;  or,  (iv)  inducing  the  person  or
Government  Official  to  improperly  influence  the  act  or  decision  of  any  organization,  including  any  government  or  government
instrumentality,  to  assist  any  Party  in  obtaining  or  retaining  business.  For  the  purposes  of  this  Section  “Government  Official”
means:  (i)  any  officer  or  employee  of:  (a)  a  government,  or  any  department  or  agency  thereof;  (b)  a  government-owned  or
controlled company, institution, or other entity, including a government-owned hospital or university; or (c) a public international
organization (such as the United Nations, the International Monetary Fund, the International Committee of the Red Cross, and the
World Health Organization), or any department or agency thereof; (ii) any political party or party official or candidate for public or
political party office; and/or (iii) any person acting in an official capacity on behalf of any of the foregoing.

9.5    Responsible Business. Each Party will work to improve its social, environmental and ethical procedures, policies and
performance  and  will  support  the  principles  set  out  in  the  United  Nations’  Universal  Declaration  of  Human  Rights  of  1948,  the
International  Labour  Organization  Conventions  and  the  ICC  Business  Charter  for  Sustainable  Developments  (hereinafter  jointly
referred  to  as  “Responsible  Business  Practices”).  Each  Party  undertakes  to  promptly  notify  the  other  Party  if  it  encounters
difficulties  in  supporting  Responsible  Business  Practices.  Upon  request  and  within  a  reasonable  period  of  time,  each  Party  will
discuss with the other Party information on its social, environmental and ethical procedures, policies and performance in order to
reasonably  substantiate  that  Responsible  Business  Practices  are  being  followed.  If,  based  on  such  discussion,  a  Party  appears  to
face  difficulties  in  supporting  Responsible  Business  Practices,  the  Parties  agree  to  collaborate  in  good  faith  to  address  any  such
difficulties as the exclusive remedy therefor.

10.    GENERAL PROVISIONS

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10.1    Assignment. Except as provided in this Section 19.1, [* * *].

10.1    Effects of Assignment, Change of Control. In the event of any assignment of this Agreement by Dicerna or upon a

Change of Control of Dicerna:

10.1.1        Dicerna’s  rights  subsequent  to  a  Change  of  Control  to  designate  Products  as  Co-Development  Products

under Sections 2.3.2 and 2.3.3 shall [* * *];

10.1.2        Novo  may  terminate  Dicerna’s  rights  to  participate  in  any  Commercialization  (including  co-promotion)

activities with respect to any Co-Development Products;

10.1.3       Novo shall have no obligations under this Agreement to provide to Dicerna any sensitive information or

materials, including information or materials relating to sales, marketing, development or strategic matters;

10.1.4        Dicerna’s  rights  as  an  Auditing  Party  under  Section  9.5  shall  be  limited  to  auditing  Novo’s  books  and

records to determine the accuracy of Net Sales and Operating Profit or Loss calculations;

10.1.5    [* * *];

10.1.6    Novo shall have the right to terminate the JSC and/or any of its Working Groups, in which case all authority

granted to the JSC and any such Working Groups shall vest in Novo; and

10.1.7       If Dicerna owes any deferred amount under Section 5.4.2(b),  Dicerna  shall  repay  to  Novo  such  deferred

amount prior to or on the date of such assignment or Change of Control of Dicerna.

10.2    Extension to Affiliates. Except as expressly set forth otherwise in this Agreement, each Party shall have the right to
extend the rights and immunities granted in this Agreement to one or more of its Affiliates. All applicable terms and provisions of
this Agreement, except this right to extend, shall apply to any such Affiliate to which this Agreement has been extended to the same
extent as such terms and provisions apply to the Party extending such rights and immunities. For clarity, the Party extending the
rights and immunities granted hereunder shall remain primarily liable for any acts or omissions of its Affiliates.

10.3        Severability.  Should  one  or  more  of  the  provisions  of  this  Agreement  become  void  or  unenforceable,  or  be
determined  to  be  void  or  unenforceable,  as  a  matter  of  Applicable  Laws,  then  this  Agreement  shall  be  construed  as  if  such
provision were not contained herein and the remainder of this Agreement shall be in full force and effect, and the Parties will use
their best efforts to substitute for the invalid or unenforceable provision a valid and enforceable provision which conforms as nearly
as possible with the original intent of the Parties.

10.4    Governing Law; English Language. This Agreement shall be governed by and construed in accordance with the
laws of the State of New York and the patent laws of the United States without giving effect to any law that would result in the
application of a different body of

72

law than as set forth in this Section 19.5. This Agreement was prepared in the English language, which language shall govern the
interpretation of, and any dispute regarding, the terms of this Agreement.

10.5    Dispute Resolution.

10.5.1    If any dispute, claim or controversy of any nature arising out of or relating to this Agreement, including any
action  or  claim  based  on  tort,  contract  or  statute,  or  concerning  the  interpretation,  effect,  termination,  validity,  performance  or
breach of this Agreement (each, a “Dispute”), arises between the Parties and the Parties cannot resolve such Dispute through their
respective Project Leaders, Program Leaders or JSC, if and as applicable, within [* * *] of a written request by either Party to the
other Party (“Notice of Dispute”), and such Dispute is not one for which a Party has final decision-making as expressly set forth in
Section 6.5.4 of this Agreement, either Party may refer the Dispute to Senior Representatives of each Party for resolution. Each
Party, within [* * *] after a Party has received such written request from the other Party to so refer such Dispute, shall notify the
other Party in writing of the Senior Representative to whom such dispute is referred. If, after an additional [* * *] after the Notice
of Dispute, such Senior Representatives have not succeeded in negotiating a resolution of the Dispute, and a Party wishes to pursue
the  matter,  each  such  Dispute,  controversy  or  claim  that  is  not  an  “Excluded  Claim”  (defined  in  Section 19.6.5)  shall  be  finally
resolved by binding arbitration by the International Chamber of Commerce (“ICC”) administered in accordance with Rules of ICC
in  effect  on  the  date  of  this  Agreement  and  applying  the  substantive  law  specified  in  Section  19.5.  Judgment  on  the  arbitration
award may be entered in any court having jurisdiction thereof. The obligation to arbitrate under this Section 19.6 shall extend to
any claims by or against the Parties and their respective Affiliates and any agents, principals, officers, directors, or employees of
either of the Parties or their respective Affiliates.

10.5.2    The arbitration shall be conducted by: [* * *] experienced in the business of pharmaceuticals. If the issues in
dispute  involve  scientific,  technical  or  commercial  matters,  the  arbitrators  chosen  hereunder  shall  engage  experts  that  have
educational training or industry experience sufficient to demonstrate a reasonable level of relevant scientific, medical and industry
knowledge, as necessary to resolve the dispute. Within [* * *] after initiation of arbitration, the Parties shall select the arbitrators.
Novo, on the one hand, shall select [* * *] arbitrator and Dicerna, on the other hand, shall select [* * *] arbitrator (or, if either Party
fails to make a choice, the ICC shall select [* * *] arbitrator on behalf of such Party) and the [* * *] arbitrators selected by the
Parties will mutually select a [* * *] arbitrator (or, if they fail to make a choice, the ICC shall select a [* * *] arbitrator). In making
their determination, the arbitrators shall not have the authority to modify any term or provision of this Agreement. A consensus
decision of any [* * *] of the arbitrators shall be final, conclusive and binding on the Parties. The place of arbitration shall be v, and
all proceedings and communications shall be in English.

10.5.3    Prior to the arbitrators being selected, either Party, without waiving any remedy under this Agreement, may
seek from any court having jurisdiction any temporary injunctive or provisional relief necessary to protect the rights or property of
that Party until final resolution of the issue by the arbitrators or other resolution of the controversy between the Parties. Once the

73

arbitrators are in place, either Party may apply to the arbitrators for interim injunctive relief until the arbitration award is rendered
or  the  controversy  is  otherwise  resolved,  and  either  Party  may  apply  to  a  court  of  competent  jurisdiction  to  enforce  interim
injunctive relief granted by the arbitrators. Any final award by the arbitrators may be entered by either Party in any court having
appropriate jurisdiction for a judicial recognition of the decision and applicable orders of enforcement. The arbitrators may render
early  or  summary  disposition  of  some  or  all  issues,  after  the  Parties  have  had  a  reasonable  opportunity  to  make  submissions  on
those issues. The  arbitrators  shall  have  no  authority  to  award  punitive  or  any  other  type  of  damages  not  measured  by  a  Party’s
compensatory damages. The arbitrators may award the costs and expenses of the arbitration, including reasonable attorneys’ fees,
disbursements, arbitration expenses, arbitrators’ fees and the administrative fee of the ICC, to the prevailing Party, which award
shall be in such manner as the arbitrators deem appropriate, based on the determination of the arbitrators on the merits.

10.5.4    Except to the extent necessary to confirm an award or as may be required by law, neither a Party nor an
arbitrator may disclose the existence, content, or results of an arbitration without the prior written consent of both Parties. In no
event shall an arbitration be initiated after the date when commencement of a legal or equitable proceeding based on the dispute,
controversy or claim would be barred by the applicable [* * *] statute of limitations.

10.5.5        As  used  in  this  Section 19.6,  the  term  “Excluded  Claim”  means  any  dispute,  controversy  or  claim  that
concerns: (a) the validity, enforceability or infringement of any patent, trademark or copyright; or (b) any antitrust, anti-monopoly
or competition law or regulation, whether or not statutory. Any Excluded Claim may be submitted by either Party to any court of
competent jurisdiction over such Excluded Claim.

10.6    Continued Performance During Pendency of Arbitral Matters. Unless and until this Agreement has terminated in
accordance  with  its  terms,  the  Parties  shall  continue  to  proceed  with  and  be  bound  by  all  rights  and  obligations  hereunder
notwithstanding the issue of a Notice of Dispute or the pendency of an Arbitral Matter, litigation involving a patent issue pursuant
to this Agreement, or any applicable Cure Period.

10.7    Consent to Non-Exclusive Jurisdiction; Service of Process. As may be permitted under this Agreement, any legal
action or proceeding that may be brought, in a [* * *] and, by execution and delivery of this Agreement, each Party hereby consents
for itself and in respect of its property, generally and unconditionally, to the non-exclusive jurisdiction of such courts. The Parties
irrevocably waive any objection, including any objection to the laying of venue or based on the grounds of forum non conveniens,
which either Party may now or hereafter have to the bringing of any such action of proceeding in such respective courts. Each Party
irrevocably consents to the service of process of any such courts in any such action or proceeding by the mailing of copies thereof
by registered or certified mail, postage prepaid, to the other Party at its address provided herein, such service to become effective [*
* *] after such mailing.

10.8        Force  Majeure.  Neither  Party  shall  be  responsible  to  the  other  for  any  failure  or  delay  in  performing  any  of  its
obligations under this Agreement or for other nonperformance hereunder (excluding, in each case, the obligation to make payments
when due) if such delay or nonperformance is caused by strike, fire, flood, earthquake, accident, war, act of terrorism, act of

74

God or of the government of any country or of any local government, or by any other cause unavoidable or beyond the control of
any  Party  hereto.  In  such  event,  such  affected  Party  shall  use  Commercially  Reasonable  Efforts  to  resume  performance  of  its
obligations and will keep the other Party informed of actions related thereto.

10.9    Waivers and Amendments. The failure of any Party to assert a right hereunder or to insist upon compliance with
any term or condition of this Agreement shall not constitute a waiver of that right or excuse a similar subsequent failure to perform
any such term or condition by the other Party. No waiver shall be effective unless it has been given in writing and signed by the
Party giving such waiver. No provision of this Agreement may be amended or modified other than by a written document signed by
authorized representatives of each Party.

10.10    Relationship of the Parties. Nothing contained in this Agreement shall be deemed to constitute a partnership, joint
venture, or legal entity of any type between Dicerna and Novo, or to constitute one as the agent of the other. Each Party shall act
solely as an independent contractor, and nothing in this Agreement shall be construed to give any Party the power or authority to
act for, bind, or commit the other to any contract, agreement or undertaking with any third Party.

10.11    Notices. All notices, consents or waivers under this Agreement shall be in writing and will be deemed to have been
duly given when: (a) scanned and converted into a portable document format file (i.e., pdf file), and sent as an attachment to an e-
mail message, where, when such message is received, a read receipt e-mail is received by the sender (and such read receipt e-mail
is  preserved  by  the  Party  sending  the  notice),  provided  further  that  a  copy  is  promptly  sent  by  an  internationally  recognized
overnight delivery service (receipt requested) (although the sending of the e-mail message shall be when the notice is deemed to
have been given); or (b) the earlier of when received by the addressee or [* * *] after it was sent, if sent by registered letter or
overnight  courier  by  an  internationally  recognized  overnight  delivery  service  (receipt  requested),  in  each  case  to  the  appropriate
addresses  and  e-mail  addresses  set  forth  below  (or  to  such  other  addresses  and  e-mail  addresses  as  a  Party  may  designate  by
notice):

If to Dicerna:

Dicerna Pharmaceuticals, Inc.
33 Hayden Avenue

Lexington, Massachusetts 02421

Attention: President and Chief Executive Officer

Fax: [* * *]

E-mail: [* * *]

75

and

If to Novo:    

Dicerna Pharmaceuticals, Inc.

33 Hayden Avenue

Lexington, Massachusetts 02421

Attention: Legal Department

Novo Nordisk A/S
Novo Alle 1
2880 Bagsvaerd
Denmark
Attention: CVP of Global Business Development

with a copy (which shall not constitute notice) to:

Novo Nordisk A/S
Novo Alle 1
2880 Bagsvaerd
Denmark
Attention: General Counsel

Dicerna shall also provide a copy of any notice (via e-mail if available) to Novo.

10.12        Further  Assurances.  Novo  and  Dicerna  hereby  covenant  and  agree  without  the  necessity  of  any  further
consideration, to execute, acknowledge and deliver any and all documents and take any action as may be reasonably necessary to
carry out the intent and purposes of this Agreement.

10.13    Compliance with Law. Each Party shall, or shall cause, its Affiliates, sublicensees or Third Party contractors to,
perform its obligations under this Agreement in accordance with all Applicable Laws, including any GCPs, GLPs, GMPs or GRPs
and Internal Compliance Codes, as applicable. No Party shall, or shall be required to, undertake any activity under or in connection

76

with this Agreement which violates, or which it believes, in good faith, may violate, any Applicable Laws.

10.14        No  Third  Party  Beneficiary  Rights. This  Agreement  is  not  intended  to  and  shall  not  be  construed  to  give  any
Third Party any interest or rights (including any Third Party beneficiary rights) with respect to or in connection with any agreement
or provision contained herein or contemplated hereby, except as otherwise expressly provided for in this Agreement.

10.15        Entire  Agreement.  This  Agreement  sets  forth  the  entire  agreement  and  understanding  of  the  Parties  as  to  the
subject matter hereof and supersedes all proposals, oral or written, and all other communications between the Parties with respect to
such  subject  matter.  The  Parties  acknowledge  and  agree  that,  as  of  the  Effective  Date,  all  Confidential  Information  disclosed
pursuant to the Confidentiality Agreement by a Party or its Affiliates shall be included in the Confidential Information subject to
this Agreement and the Confidentiality Agreement is hereby superseded in its entirety; provided, that the foregoing shall not relieve
any Person of any right or obligation accruing under the Confidentiality Agreement prior to the Effective Date. “Confidentiality
Agreement” means the Mutual Confidentiality Agreement between Dicerna and Novo dated August 14th, 2018, as amended on
August 14, 2019, and further amended with respect to exclusivity disclosure on October 9, 2019.

10.16    Counterparts. This Agreement may be executed in two (2) or more counterparts, each of which shall be deemed an
original,  but  all  of  which  together  shall  constitute  one  and  the  same  instrument.  Counterpart  signature  pages  may  be  validly
delivered by facsimile or by electronic mail in PDF format and such signature pages shall have the same effect as originals.

10.17    Expenses. Each Party shall pay its own costs, charges and expenses incurred in connection with the negotiation,

preparation and execution of this Agreement.

10.18    Binding Effect. This Agreement shall be binding upon and inure to the benefit of the Parties and their respective

legal representatives, successors and permitted assigns.

10.19        Construction.  The  Parties  hereto  acknowledge  and  agree  that:  (a)  each  Party  and  its  counsel  reviewed  and
negotiated the terms and provisions of this Agreement and have contributed to its revision; (b) the rule of construction to the effect
that any ambiguities are resolved against the drafting Party shall not be employed in the interpretation of this Agreement; and (c)
the terms and provisions of this Agreement shall be construed fairly as to all Parties hereto and not in a favor of or against any
Party, regardless of which Party was generally responsible for the preparation of this Agreement.

10.20    Interpretation. The captions and headings to this Agreement are for convenience only, and are to be of no force or
effect in construing or interpreting any of the provisions of this Agreement. Unless specified to the contrary, references to Articles,
Sections, Schedules or Exhibits mean the particular Articles, Sections, Schedules or Exhibits to this Agreement and references to
this Agreement include all Exhibits hereto. In the event of any conflict between the main body of this Agreement and any Exhibit
hereto, the main body of this Agreement shall prevail. Unless context otherwise clearly requires, whenever used in this Agreement:
(a) the words “include” or

77

“including”  shall  be  construed  as  incorporating,  also,  “but  not  limited  to”  or  “without  limitation”;  (b)  the  word  “day”  or  “year”
means  a  Calendar  Day  or  year  unless  otherwise  specified;  (c)  the  word  “notice”  shall  mean  notice  in  writing  (whether  or  not
specifically  stated)  and  shall  include  notices,  consents,  approvals  and  other  written  communications  contemplated  under  this
Agreement; (d) the words “hereof,” “herein,” “hereby” and derivative or similar words refer to this Agreement as a whole and not
merely to the particular provision in which such words appear; (e)  the words “shall” and “will” have interchangeable meanings for
purposes  of  this  Agreement;  (f)  provisions  that  require  that  a  Party,  the  Parties  or  a  committee  hereunder  “agree,”  “consent”  or
“approve”  or  the  like  shall  require  that  such  agreement,  consent  or  approval  be  specific  and  in  writing,  whether  by  written
agreement, letter, approved minutes or otherwise; (g) words of any gender include the other gender; (h) words using the singular or
plural  number  also  include  the  plural  or  singular  number,  respectively;  (i)  references  to  any  specific  law,  rule  or  regulation,  or
article, section or other division thereof, shall be deemed to include the then-current amendments thereto or any replacement law,
rule or regulation thereof; (j) the phrase “non-refundable” shall not prohibit, limit or restrict either Party’s right to obtain damages
in connection with a breach of this Agreement; and (k) neither Party shall be deemed to be acting on behalf of the other Party.

10.21    Cumulative Remedies. No remedy referred to in this Agreement is intended to be exclusive unless explicitly stated
to  be  so,  but  each  shall  be  cumulative  and  in  addition  to  any  other  remedy  referred  to  in  this  Agreement  or  otherwise  available
under law.

10.22    Export. Each Party acknowledges that the laws and regulations of the United States restrict the export and re-export
of  commodities  and  technical  data  of  United  States  origin.  Each  Party  agrees  that  it  will  not  export  or  re-export  restricted
commodities  or  the  technical  data  of  the  other  Party  in  any  form  without  appropriate  United  States  and  foreign  government
licenses.

[Remainder of page left blank intentionally; signature page follows.]

78

IN WITNESS WHEREOF,  the  Parties  intending  to  be  bound  have  caused  this  Agreement  to  be  executed  by  their  duly

authorized representatives.

DICERNA PHARMACEUTICALS, INC.

By: /s/ Douglas Fambrough    
Name: Douglas Fambrough
Title: CEO

NOVO NORDISK A/S

By: /s/ Karsten Munk Knudsen    
Name: Karsten Munk Knudsen
Title:    Executive Vice President

NOVO NORDISK A/S

By: /s/ Mads Krogsgaard Thomsen    
Name:    Mads Krogsgaard Thomsen
Title:    Executive Vice President

[Signature Page to Collaboration and License Agreement]

 
Exhibit A

Work Flow Plan

[* * *]

A-1

 
    
Exhibit B

Initial Research Plan

To be attached hereto by the Parties as set forth in Section 4.1.4.

 
Exhibit C

Novo Nordisk A/S’s Invoicing Instructions 

In order to ensure timely settlement of invoices, you are kindly requested to observe the below guidelines when sending invoices or
credit notes to Novo Nordisk. 

All invoices should be sent via email by attaching the invoice as a PDF file, email address: [* * *]. Novo Nordisk is unable to
process invoices sent by telefax. 

All invoices must include the following information: 

•Full name and Novo Nordisk initials of the Project Director for Novo Nordisk:  
•It must be clearly stated that the document is an invoice   

•A reference to the Novo Nordisk agreement ID ________  

•Value Added Tax number or Federal ID/registration number   

•Bank information:  

1. International Bank Account Number 
2. Bank Name: The name of beneficiary’s bank 
3. Bank Address: The address of beneficiary’s bank 
4. Bank Key #: ABA/Routing/Fedwire/Transit number/Sort Number  
5. Swift: Swift code 
6. Account Name: Under what name beneficiary’s bank account is open 
7. Account Number: Number of beneficiary’s bank account and/or IBAN code, which is applicable in all EU countries. 

 
 
 
 
 
 
 
Exhibit D

Press Release

Dicerna and Novo Nordisk enter agreement to discover and develop RNAi therapies for liver-related

cardio-metabolic diseases

•

•

•

•

•

Collaboration to explore liver cell targets using Dicerna’s GalXC™ technology with the potential to deliver a significant number of clinical
candidates

Each company to retain rights to co-develop and co-commercialise product candidates

Dicerna to receive upfront payment of USD 175 million and equity investment of USD 50 million

Dicerna is eligible to receive an additional USD 75 million over the first three years, plus up to USD 357.5 million per target in potential milestone
payments, and royalties on product sales

[* * *]

Lexington, Massachusetts, US, and Bagsværd, Denmark, 18 November 2019 – Dicerna™ Pharmaceuticals, Inc. (Nasdaq: DRNA) and Novo Nordisk A/S
today announced an agreement to discover and develop novel therapies for the treatment of liver-related cardio-metabolic diseases using Dicerna’s proprietary
GalXC™ RNAi platform technology. The collaboration plans to explore more than 30 liver cell targets and may deliver multiple clinical candidates for
disorders including chronic liver disease, non-alcoholic steatohepatitis (NASH), type 2 diabetes, obesity, and rare diseases. Dicerna will conduct and fund
discovery and preclinical development to clinical candidate selection for each liver cell target, and Novo Nordisk will be responsible for all further
development.

The agreement represents a significant investment by Novo Nordisk to secure access to Dicerna’s proprietary GalXC RNAi platform, which complements its
existing technology base. The collaboration provides Novo Nordisk with the capability to inhibit hepatocyte targets involved in disease regulation and has the
potential to generate a number of clinical development candidates.

“We are excited to collaborate with Novo Nordisk on this broad research and development effort that extends the reach of our GalXC platform to a wide
range of liver cell targets and maximises our opportunities in serious liver diseases,” said Douglas M Fambrough, PhD, president and chief executive officer
of Dicerna. “Our efforts will benefit from Novo Nordisk’s expertise in cardio-metabolic diseases and years of experience developing and commercialising
innovative therapies worldwide, which will help us advance novel RNAi treatments for underserved patient populations.”

The agreement enables each company to co-develop and co-commercialise product candidates discovered under the collaboration. Novo Nordisk will lead
programmes targeting cardio-metabolic disorders and other indications with Dicerna having the option to opt into two programmes during clinical
development. Dicerna retains rights to initiate two new orphan liver disease programmes for which Novo Nordisk can opt in. For all co-development
programmes,

D-1

 
the companies will share in the profit/loss of net sales of products consistent with each company’s contribution to co-development costs.

“Through this important collaboration with Dicerna, we gain access to an innovative technology and deep expertise in RNA interference,” said Marcus
Schindler, senior vice president of Global Drug Discovery in Novo Nordisk. “Dicerna is the ideal partner to discover and develop molecules for targets that
may yield multiple potential treatments across disease areas such as diabetes, obesity, cardiovascular and NASH. We will work closely together to unlock the
true potential of treating a range of diseases using RNAi therapies, for the benefit of patients.”

Under the terms of the agreement, Dicerna will receive:

•
•
•

•

An upfront payment of USD 175 million.
A USD 50 million equity investment in Dicerna at a premium.
USD 25 million annually during each of the first three years of the collaboration, contingent on Dicerna delivering RNAi molecules for a defined
number of targets.
Up to USD 357.5 million per target in development, regulatory and commercialisation milestone payments, plus tiered royalties on product sales
ranging from the mid-single-digits to mid-teens.

The transaction is subject to the expiration or termination of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 and other
customary conditions.

[* * *]

About Dicerna's GalXC™ RNAi technology platform
Dicerna’s proprietary RNA interference (RNAi) technology platform, called GalXC™, aims to advance the development of next-generation RNAi-based
therapies designed to silence disease-driving genes in the liver and other tissues. Liver-targeted GalXC-based compounds enable subcutaneous delivery of
RNAi therapies that are designed to bind specifically to receptors on liver cells, leading to internalisation and access to the RNAi machinery within the cells.
The GalXC approach seeks to optimise the activity of the RNAi pathway so that it operates in the most specific and potent fashion. Compounds produced via
GalXC are intended to be broadly applicable across multiple therapeutic areas, including both liver and non-liver indications.

About Dicerna™ Pharmaceuticals, Inc.
Dicerna™ Pharmaceuticals, Inc., is a biopharmaceutical company using ribonucleic acid (RNA) interference (RNAi) to develop medicines that silence genes
that cause disease. The company is applying its proprietary GalXC™ technology to develop potent, selective, and safe RNAi therapies for treatment of rare
diseases, chronic liver diseases, cardiovascular diseases, neurodegenerative diseases, pain and viral infectious disease. Dicerna aims to treat disease by
addressing the underlying causes of illness with capabilities that extend beyond the liver to address a broad range of diseases, focusing on target genes where
connections between gene and disease are well understood and documented. Dicerna intends to discover, develop and commercialise novel therapies either on
its own or in collaboration with pharmaceutical partners. Dicerna has strategic collaborations with Novo Nordisk A/S, Roche, Eli Lilly and Company, Alexion
Pharmaceuticals, Inc. and Boehringer Ingelheim International GmbH. For more information, please visit www.dicerna.com.

Dicerna Forward-Looking Statements
This press release includes forward-looking statements. Such forward-looking statements are subject to risks and uncertainties that could cause actual results
to differ materially from those expressed or implied in such statements.

D-2

 
Examples of forward-looking statements include, among others, statements we make regarding: (i) the full potential to leverage our GalXC platform to target
and silence specific genes that contribute to cardio-metabolic diseases; (ii) the potential to earn revenue from royalties and milestone payments under the
collaboration with Novo Nordisk; (iii) research and development plans related to GalXC and its utility in silencing genes that contribute to cardio-metabolic
diseases; (iv) the potential of RNAi therapies for the treatment of cardio-metabolic diseases; and (v) the potential for the collaboration and co-
commercialization of products by Novo Nordisk and Dicerna. The process by which an early-stage platform such as GalXC could potentially lead to an
approved product is long and subject to highly significant risks, particularly with respect to a preclinical research collaboration. Applicable risks and
uncertainties include those relating to preclinical research and other risks identified under the heading "Risk Factors" included in Dicerna's most recent
quarterly report on Form 10-Q and in other filings made by the company with the Securities and Exchange Commission. The forward-looking statements
contained in this press release reflect Dicerna's current views with respect to future events, and Dicerna does not undertake and specifically disclaims any
obligation to update any forward-looking statements, except as required by law.

* Novo Nordisk A/S and Roche transactions are subject to clearance under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 and other customary
closing conditions.

Dicerna™ and GalXC™ are trademarks of Dicerna Pharmaceuticals, Inc.

Novo Nordisk is a global healthcare company with more than 95 years of innovation and leadership in diabetes care. This heritage has given us experience and capabilities that also
enable us to help people defeat obesity, haemophilia, growth disorders and other serious chronic diseases. Headquartered in Denmark, Novo Nordisk employs approximately 42,200
people in 80 countries and markets its products in more than 170 countries. For more information, visit novonordisk.com, Facebook, Twitter, LinkedIn, YouTube.

Further information

Media Dicerna:

Amy Trevvett

Alex Van Rees, SmithSolve

Media Novo Nordisk:

Mette Kruse Danielsen

Ken Inchausti (US)

Investors Dicerna:

1 617-612-6253

+1 973-442-1555 
ext. 111

45 3079 3883

1 609 240 9429

atrevvett@dicerna.com
alex.vanrees@smithsolve.com

mkd@novonordisk.com
kiau@novonordisk.com

Lauren Stival, Stern Investor Relations, Inc.

1 212-362-1200

lauren.stival@sternir.com

Investors Novo Nordisk:

Peter Hugreffe Ankersen

Valdemar Borum Svarrer

Ann Søndermølle Rendbæk

Mark Joseph Root

Kristoffer Due Berg (US)

45 3075 9085

45 3079 0301

45 3075 2253

45 3079 4211

1 609 235 2989

phak@novonordisk.com
jvls@novonordisk.com
arnd@novonordisk.com
mjhr@novonordisk.com
krdb@novonordisk.com

D-3

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
#    #    #

D-4

 
Exhibit E

Existing Patents

[* * *]

E-1

 
Exhibit F

Co-Development Programs Profit Sharing

[* * *]

E-1

 
Exhibit G

Co-Promotion Principles

[* * *]

G-1

 
Exhibit H

Dicerna Competitors

[* * *]

Exhibit I

Dicerna Contract Manufacturers

[* * *]

Exhibit J

Patent Prosecution: Default Countries & Territories

[* * *]

Exhibit K

[Intentionally Omitted]

Exhibit L

Use of Human Biosamples and Informed Consent

[* * *]

L-1

5028265.7B

Exhibit M

NOVO Principles for the Use of Animals

[* * *]

Exhibit 10.48

EXECUTION VERSION

SHARE ISSUANCE AGREEMENT

THIS SHARE ISSUANCE AGREEMENT (this “Agreement”), is made as of November 15, 2019, by and between Novo
Nordisk  A/S,  a  public  limited  liability  company  (the  “Share  Acquiror”),  and  Dicerna  Pharmaceuticals,  Inc.,  a  Delaware
corporation (the “Company”).

WHEREAS, concurrently with the entering into of this Agreement, the Company and the Share Acquiror are entering into

that certain Collaboration and License Agreement (the “License Agreement”);

WHEREAS, pursuant to the terms and subject to the conditions set forth in this Agreement, the Company desires to issue
and  sell  to  the  Share  Acquiror,  and  the  Share  Acquiror  desires  to  acquire  from  the  Company,  at  the  Closing  (as  defined  below)
2,279,982  shares  (the  “Shares”)  of  the  Company’s  common  stock,  par  value  $0.0001  per  share  (“Common  Stock”),  for  an
aggregate purchase price of $50,000,005.26 (the “Purchase Price”);

NOW,  THEREFORE,  in  consideration  of  the  foregoing  recitals,  the  mutual  representations,  warranties,  promises  and
obligations in the License Agreement and the following mutual representations, warranties, promises and obligations, and for other
good  and  valuable  consideration,  the  adequacy  and  sufficiency  of  which  are  hereby  acknowledged,  the  Share  Acquiror  and  the
Company agree as follows:

1. Definitions.

1.1 Defined Terms. When used in this Agreement, the following terms shall have the respective meanings specified

therefor below:

“2014  ESPP”  means  the  2014  Employee  Stock  Purchase  Plan  of  the  Company,  as  approved  by  the  stockholders  of  the

Company on January 28, 2014.

“2014 Performance Incentive Plan” means the 2014 Performance Incentive Plan of the Company, as adopted by the Board

on January 14, 2014, as amended to date.

“2016 Inducement Plan” means the 2016 Inducement Plan of the Company, as adopted by the Board on March 4, 2016, as

amended to date.

“Affiliate” means, with respect to a specified Person, any other Person that controls, is controlled by or is under common
control with the applicable Person. As used herein, “controls”, “control” and “controlled” means the possession, direct or indirect,
of the power to direct the management and policies of a Person, whether through the ownership of voting interests of such Person,
through  Contract  or  otherwise;  provided,  that  the  Company  and  its  Subsidiaries  shall  not  be  deemed  Affiliates  of  the  Share
Acquiror  or  its  Subsidiaries.  Novo  Holdings  A/S,  the  Novo  Nordisk  Foundation,  and  Novozymes  A/S  and  their  respective
Excluded Affiliates (other than Novo and its subsidiaries) are not considered Affiliates of Novo.

“Agreement” means as set forth in the Preamble, including all exhibits, schedules and appendices attached hereto.

“Antitrust Law” means any federal, state or foreign law, regulation or decree, including the HSR Act, designed to prohibit,

restrict or regulate actions for the purpose or effect of monopolization or restraint of trade.

“Beneficially Own”, “Beneficially Owned”, “Beneficial Ownership” or “Beneficial Owner” and words of similar import

have the meaning assigned to such terms pursuant to Rule 13d-3 under the Exchange Act.

“Business  Day”  means  a  day  on  which  commercial  banking  institutions  are  open  for  business  in  each  of  Boston,

Massachusetts, New York, New York and Copenhagen, Denmark .

“Common Stock Equivalents” means any options, warrants or other securities or rights convertible into or exercisable or
exchangeable  for,  whether  directly  or  following  conversion  into  or  exercise  or  exchange  for  other  options,  warrants  or  other
securities or rights, shares of Common Stock.

“Contract”  means,  with  respect  to  any  Person,  any  written  or  oral  contracts,  agreements,  deeds,  mortgages,  indentures,
bonds,  loans,  leases,  subleases,  licenses,  sublicense,  statements  of  work,  instruments,  notes,  commitments,  commissions,
undertakings,  arrangements  and  understandings  to  which  such  Person  is  a  party  or  by  which  any  of  its  properties  or  assets  are
subject.

“Disposition” or “Dispose of” means (a) pledge, sale, contract to sell, sale of any option or Contract to purchase, purchase
of any option or Contract to sell, grant of any option, right or warrant for the sale of, or other disposition of or transfer of any shares
of Common Stock, or any Common Stock Equivalents, including, without limitation, any “short sale” or similar arrangement, or (b)
swap,  hedge,  derivative  instrument  or  any  other  agreement  or  any  transaction  that  transfers,  in  whole  or  in  part,  directly  or
indirectly,  the  economic  consequence  of  ownership  of  shares  of  Common  Stock,  whether  any  such  swap  or  transaction  is  to  be
settled by delivery of securities, in cash or otherwise.

“Exchange Act” means the Securities Exchange Act of 1934, as amended.

“Excluded Affiliates” means with respect to Novo Holdings A/S, the Novo Nordisk Foundation, and Novozymes A/S and
any person, corporation, company, partnership, joint venture or other entity, which Controls, is Controlled by, or is under common
Control with such entities.

“Governmental  Authority”  means  any  applicable  government  authority,  court,  tribunal,  arbitrator,  agency,  department,
legislative  body,  commission  or  other  instrumentality  of  (a)  any  government  of  any  country  or  territory,  (b)  any  nation,  state,
province, county, city or other political subdivision thereof or (c) any supranational body.

“HSR Act” means the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, and the rules and regulations

promulgated thereunder.

“Law”  or  “Laws”  means  all  laws,  statutes,  rules,  regulations,  orders,  judgments,  injunctions  and/or  ordinances  of  any

Governmental Authority.

“Material Adverse Effect” shall mean any change, event or occurrence (each, an “Effect”) that, individually or when taken
together with all other effects that have occurred prior to the date of determination of the occurrence of the Material Adverse Effect,
is or is reasonably likely to be materially adverse to the business, financial condition, assets, liabilities or results of operations of
the Company and its Subsidiaries, taken as a whole; provided, however, that in no event shall any of the following occurring after
the  date  hereof,  alone  or  in  combination,  be  deemed  to  constitute,  or  be  taken  into  account  in  determining  whether  a  Material
Adverse  Effect  has  occurred:  (a)  changes  in  the  Company’s  industry  generally  or  in  conditions  in  the  United  States  or  global
economy  or  capital  or  financial  markets  generally,  including  changes  in  interest  or  exchange  rates,  (b)  any  Effect  caused  by  the
announcement or pendency of the Transactions, or the identity of the Share Acquiror or any of its Affiliates as the purchaser in
connection with the transactions contemplated by this Agreement or as a participant in the License Agreement, (c) the performance
of this Agreement, the License Agreement and the transactions contemplated hereby and thereby, including compliance with the
covenants set forth herein and therein, or any action taken or omitted to be taken by the Company at the request or with the prior
consent of the Share Acquiror, (d) changes in general legal, regulatory, political, economic or business conditions occurring after
the date hereof that, in each case, generally affect the biotechnology or biopharmaceutical industries, (e) acts of war, sabotage or
terrorism  occurring  after  the  date  hereof,  or  any  escalation  or  worsening  of  any  such  acts  of  war,  sabotage  or  terrorism,  or  (f)
earthquakes,  hurricanes,  floods  or  other  natural  disasters  occurring  after  the  date  hereof;  provided,  however, that with  respect  to
clauses  (a),  (d),  (e)  and  (f),  such  effects,  alone  or  in  combination,  may  be  deemed  to  constitute,  or  be  taken  into  account  in
determining  whether  a  Material  Adverse  Effect  has  occurred,  but  only  to  the  extent  such  effects  disproportionately  affect  the
Company and its Subsidiaries compared to other participants in the biotechnology or biopharmaceutical industries.

“Material Contract” means all Contracts that are required to be filed as exhibits by the Company with the SEC pursuant to

Items 601(b)(4) and 601(b)(10) of Regulation S-K promulgated by the SEC.

“Nasdaq” means the Nasdaq Capital Market, the Nasdaq Global Market, or the Nasdaq Global Select Market.

“Organizational  Documents”  means  (a)  the  Amended  and  Restated  Certificate  of  Incorporation  of  the  Company,  as
amended  and  restated  from  time  to  time  and  as  in  effect  as  of  the  date  of  this  Agreement,  and  (b)  the  Amended  and  Restated
Bylaws of the Company as in effect as of the date of this Agreement.

“Permitted Transferee” means an Affiliate of the Share Acquiror; provided, however, that no such Person shall be deemed

a Permitted Transferee for any purpose under this Agreement unless: (a) the

Permitted Transferee, prior to or simultaneously with any Disposition, shall have agreed in writing to be subject to and bound by all
restrictions and obligations set forth in this Agreement as though it were the Share Acquiror hereunder, and (b) the Share Acquiror
acknowledges that it continues to be bound by all restrictions and obligations set forth in this Agreement.

“Person”  means  any  individual,  partnership,  limited  liability  company,  firm,  corporation,  trust,  unincorporated

organization, government or any department or agency thereof or other entity.

“Prospectus” means the prospectus (including any preliminary, final or summary prospectus) included in any Registration
Statement, all amendments and supplements to such prospectus and all other material incorporated by reference in such prospectus

“Register,”  “Registered”  and  “Registration”  means  a  registration  effected  by  preparing  and  filing  (a)  a  Registration
Statement  in  compliance  with  the  Securities  Act  (and  any  post-effective  amendments  filed  or  required  to  be  filed)  and  the
declaration or ordering of effectiveness of such Registration Statement, or (b) a Prospectus and/or Prospectus supplement in respect
of an appropriate effective Registration Statement.

“Registrable Securities”  means  the  Shares;  provided,  that  any  Shares  will  cease  to  be  Registrable  Securities  when  such
Shares (A) have been sold or otherwise Disposed of pursuant to an effective Registration Statement or (B) may be sold under Rule
144 without regard to volume restrictions.

“Registration  Statement”  means  a  registration  statement  of  the  Company  that  covers  the  resale  of  any  Registrable
Securities  pursuant  to  the  provisions  of  Appendix  1  filed  with,  or  to  be  filed  with,  the  SEC  under  the  rules  and  regulations
promulgated  under  the  Securities  Act,  including  the  related  Prospectus,  amendments  and  supplements  to  each  such  registration
statement  or  Prospectus,  including  pre-  and  post-effective  amendments,  all  exhibits  thereto,  financial  information  and  all  other
material incorporated by reference or deemed to be incorporated by reference in such registration statement.

“Rule 144” means Rule 144 under the Securities Act.

“Securities Act” means the Securities Act of 1933, as amended.

“Shelf  Registration  Statement”  means  a  “shelf”  registration  statement  of  the  Company  that  covers  all  Registrable
Securities on Form S-3 and under Rule 415 under the Securities Act or, if the Company is not then eligible to file on Form S-3, on
another eligible form under the Securities Act, or any successor rule that may be adopted by the SEC, including without limitation
any  such  registration  statement  filed  pursuant  to  Appendix  1  and  all  amendments  and  supplements  to  such  “shelf”  registration
statement, including, post-effective amendments, in each case, including the Prospectus contained therein, all exhibits thereto and
any document incorporated by reference therein.

“Subsidiary”  means  any  corporation,  association  trust,  limited  liability  company,  partnership,  joint  venture  or  other
business  association  or  entity  (a)  at  least  50%  of  the  outstanding  voting  securities  of  which  are  at  the  time  owned  or  controlled
directly or indirectly by the Company or (b) with respect to which the Company possesses, directly or indirectly, the power to direct
or cause the direction of the affairs or management of such Person.

“Tax” or “Taxes” shall mean all federal, state, local, and foreign income, excise, gross receipts, gross income, ad valorem,
profits,  gains,  property,  capital,  sales,  transfer,  use,  payroll,  employment,  severance,  withholding,  duties,  intangibles,  franchise,
backup withholding, value-added, and other taxes imposed by a Governmental Authority, together with all interest, penalties and
additions to tax imposed with respect thereto.

“Tax Return” shall mean a report, return or other document (including any amendments thereto) required to be supplied to

a Governmental Authority with respect to Taxes.

“Third Party” means any Person other than the Share Acquiror, the Company, or any Affiliate of the Share Acquiror or the

Company.

“Trading Market” means the following markets or exchanges on which the Common Stock is listed or quoted for trading
on the date in question: the Nasdaq Capital Market, the Nasdaq Global Market, the Nasdaq Global Select Market, the New York
Stock Exchange or the NYSE MKT.

“Transactions” means the issuance of the Shares by the Company, and the acquisition of the Shares by the Share Acquiror,

in accordance with the terms hereof, and any other transactions contemplated by this Agreement.

“Transaction Agreements” means this Agreement and the License Agreement.

“Transfer  Agent”  means  American  Stock  Transfer  &  Trust  Company,  LLC,  and  any  successor  transfer  agent  of  the

Company.

“Underwriter”  means,  with  respect  any  Underwritten  Offering,  a  securities  dealer  who  purchases  any  Registrable

Securities as a principal in connection with a distribution of such Registrable Securities.

“Underwritten  Offering”  means  a  public  offering  of  securities  Registered  under  the  Securities  Act  in  which  an
Underwriter participates in the distribution of such securities, including on a firm commitment basis for reoffer and resale to the
public, including any such offering that is a “bought deal” or a block trade.

1.2 Additional Defined Terms.  In  addition  to  the  terms  defined  in  Section 1.1,  the  following  terms  shall  have  the

respective meanings assigned thereto in the sections indicated below:

Defined Term
Board
Code
Closing
Closing Date
Common Stock
Company
Company SEC Reports
Enforceability Exceptions
FCPA
FDA
Financial Statements
GAAP
License Agreement
Lockup Period
Lockup Shares
Money Laundering Laws
OFAC
Preferred Stock
Purchase Price
Regulatory Authorities
Regulatory Permits
Required Approvals
SEC
Share Acquiror
Shares
Studies
Third Party Tender/Exchange Offer

Section
Section 4.4(c)
Section 4.16(b)
Section 3.1
Section 3.1
Recitals
Preamble
Section 4.9(a)
Section 4.4(b)
Section 4.20
Section 4.24
Section 4.9(b)
Section 4.9(b)
Recitals
Section 6.3
Section 6.3
Section 4.21
Section 4.22
Section 4.2(a)
Recitals
Section 4.23
Section 4.24
Section 4.6
Section 4.6
Preamble
Recitals
Section 4.23
Section 6.3

2.  Purchase  and  Sale  of  Common  Stock.  Subject  to  the  terms  and  conditions  of  this  Agreement,  at  the  Closing,  the
Company  shall  issue  and  sell  to  the  Share  Acquiror  and  the  Share  Acquiror  shall  acquire  from  the  Company  the  Shares  for  the
Purchase Price, which shall be paid in cash; provided, however, that in the event of any stock dividend, stock split, combination of
shares or recapitalization with respect to Common Stock after the date of this Agreement and on or prior to the Closing Date, the
number of Shares shall be adjusted proportionately.

3. Closing Date; Deliveries.

3.1 Closing Date. The closing of the acquisition and issuance of the Shares hereunder (the “Closing”) shall be held
by  electronic  exchange  of  signature  pages  and  Shares  at  10:00  am  (New  York  City  time),  on  such  date  as  is  agreed  to  by  the
Company and the Share Acquiror, which date shall be no later

 
 
 
than the fifth (5th) Business Day after the satisfaction or waiver of the conditions to the Closing set forth in Sections 7 and 8 (other
than  those  conditions  that  by  their  nature  are  to  be  satisfied  at  the  Closing,  but  subject  to  the  satisfaction  or  waiver  of  such
conditions at the Closing), or at such other time and date as the parties may mutually agree in writing. The date the Closing occurs
is hereinafter referred to as the “Closing Date.”

3.2 Deliveries. (a) At the Closing, the Company shall deliver or cause to be delivered to the Share Acquiror (i) the Shares in
book-entry form; (ii) evidence reasonably satisfactory to the Share Acquiror that the Shares have been issued to the Share Acquiror
pursuant to a private placement exempt from registration under the Securities Act; (iii) a certificate, executed by the Chief
Executive Officer or Chief Financial Officer of the Company, dated as of the Closing Date, to the effect that the Conditions
specified in Section 8.1 and Section 8.2 have been satisfied; and (iv) a copy of the irrevocable instructions to the Transfer Agent
instructing the Transfer Agent to deliver, on an expedited basis, the Shares to the Share Acquiror, via a book entry position in an
account registered in the name of the Purchaser at the Transfer Agent and evidence of Share Acquiror’s ownership of the Shares
from the Transfer Agent in the form of Direct Registration Book Entry Advice; and (b) at least three (3) Business Days prior to the
Closing Date, the Share Acquiror shall deliver to the Company the Purchase Price by wire transfer of immediately available funds
to an account designated by the Company in writing to the Share Acquiror. The Company shall utilize an escrow agent reasonably
acceptable to the Share Acquiror (it being understood that the Company’s U.S. counsel Goodwin Procter LLP shall be reasonably
acceptable for such purpose) to receive the Purchase Price as contemplated herein. The Company shall cause such escrow agent to
follow the written instructions, including through means of electronic mail, of the Share Acquiror (or any one of its authorized
representatives or that of its counsel) with respect to the release of the Purchase Price at the Closing. The Company and the Share
Acquiror agree that no interest shall accrue on the Purchase Price deposited into the Company’s account as contemplated by this
Section 3.2.

4. Representations and Warranties of the Company. The Company hereby represents and warrants to the Share Acquiror as

of the date hereof and as of the Closing Date as follows:

4.1 Organization.  The  Company  is  a  corporation  duly  organized,  validly  existing  and  in  good  standing  under  the
laws of the State of Delaware. The Company has all requisite corporate power and authority to enter into this Agreement, to issue
the Shares and to perform its obligations under and to carry out the Transactions contemplated by this Agreement. The Company is
duly qualified as a foreign corporation to transact business and is in good standing in each jurisdiction in which such qualification
is required, whether by reason of the ownership or leasing of property or the conduct of business, except whether the failure to so
qualify or be in good standing would not, individually or in the aggregate, constitute a Material Adverse Effect. The Company is
not  in  violation  of,  in  conflict  with,  or  in  default  under  its  Organizational  Documents  in  any  material  respect.  True  and  correct
copies of the Organizational Documents, as in effect on the date of this Agreement, are each filed or incorporated by reference as
exhibits to the Company SEC Reports.

4.2 Capitalization.

(a) As of September 30, 2019, the authorized capital stock of the Company consists of (i) 150,000,000 shares
of Common Stock and (ii) 5,000,000 shares of preferred stock, par value $0.0001 per share (“Preferred Stock”). As of September
30,  2019,  (A)  68,360,051  shares  of  Common  Stock  are  issued  and  outstanding;  (B)  no  shares  of  Common  Stock  are  held  in  the
treasury  of  the  Company;  (C)  no  shares  of  Preferred  Stock  are  issued  or  outstanding;  (D)  an  aggregate  of  4,522,599  shares  of
Common  Stock  are  reserved  for  future  issuance  under  the  Company’s  2014  Performance  Incentive  Plan,  2014  ESPP  and  2016
Inducement Plan; (E) 12,801,016 shares of Common Stock are subject to outstanding options to acquire shares of Common Stock;
(F) no shares of unvested restricted Common Stock are outstanding; and (G) 2,198 shares of Common Stock underlie outstanding
warrants  to  purchase  shares  of  Common  Stock.  Except  as  set  forth  in  a  written  notice  provided  by  the  Company  to  the  Share
Acquiror prior to the execution of this Agreement and referencing this Section 4.2, as of the date of this Agreement, the Company
has no other shares of capital stock or securities convertible into capital stock of the Company, authorized, issued or outstanding.

issued, fully paid and non-assessable and have been issued in compliance with all federal and state securities Laws.

(b)  All  of  the  issued  and  outstanding  shares  of  capital  stock  of  the  Company  are  duly  authorized,  validly

preemptive rights with respect to any securities of the Company.

(c) Except as set forth in the Company SEC Reports and pursuant to this Agreement, no Person is entitled to

of its equity securities or any interests therein or to pay any dividend or make any distribution in respect thereof.

(d) The Company has no obligation (contingent or otherwise) to purchase, redeem or otherwise acquire any

(e) Except as set forth in the Company SEC Reports and as may be provided in this Agreement, there are no
voting agreements, buy-sell agreements or right of first purchase agreements among the Company and any of the stockholders of
the Company relating to the securities of the Company held by them.

Stock or other securities to any other Person (other than the Share Acquiror).

(f) The issuance and sale of the Shares hereunder will not obligate the Company to issue shares of Common

(g)  The  Company  does  not  have  outstanding  any  stockholder  rights  plans  or  “poison  pill”  or  any  similar
arrangement in effect giving any Person the right to purchase any equity interest in the Company upon the occurrence of certain
events.

4.3  Subsidiaries.  A  complete  list  of  each  direct  and  indirect  Subsidiary  of  the  Company,  including  its  name  and
jurisdiction  of  incorporation  or  formation,  is  attached  hereto  as  Exhibit  A.  Each  Subsidiary  has  been  duly  incorporated  or
organized, as the case may be, and is validly existing as a

corporation,  partnership  or  limited  liability  company,  as  applicable,  in  good  standing  under  the  laws  of  the  jurisdiction  of  its
incorporation or organization and has the power and authority (corporate or other) to own, lease and operate its properties and to
conduct  its  business  as  presently  conducted.  Each  Subsidiary  is  duly  qualified  as  a  foreign  corporation,  partnership  or  limited
liability  company,  as  applicable,  to  transact  business  and  is  in  good  standing  in  each  jurisdiction  in  which  such  qualification  is
required,  whether  by  reason  of  the  ownership  or  leasing  of  property  or  the  conduct  of  business,  except  where  the  failure  to  so
qualify or be in good standing would not, individually or in the aggregate, constitute a Material Adverse Effect. All of the issued
and  outstanding  capital  stock  or  other  equity  or  ownership  interests  of  each  Subsidiary  have  been  duly  authorized  and  validly
issued,  are  fully  paid  and  nonassessable  and  are  owned  by  the  Company,  directly  or  through  subsidiaries,  free  and  clear  of  any
encumbrances or preemptive and similar rights to subscribe for or purchase securities.

4.4 Authorization.

(a)  All  requisite  corporate  action  on  the  part  of  the  Company  required  by  applicable  Law  for  the
authorization, execution and delivery by the Company of this Agreement and the performance of all obligations of the Company
hereunder and thereunder, including the authorization, issuance and delivery of the Shares, has been taken.

(b) This Agreement has been duly executed and delivered by the Company, and upon the due execution and
delivery  of  this  Agreement  by  the  Share  Acquiror,  it  will  constitute  valid  and  legally  binding  obligations  of  the  Company,
enforceable  against  the  Company  in  accordance  with  its  terms,  except  as  limited  by:  (i)  applicable  bankruptcy,  insolvency,
reorganization, moratorium, fraudulent conveyance and other Laws of general application relating to or affecting enforcement of
creditors’ rights generally; and (ii) as limited by Laws relating to the availability of specific performance, injunctive relief or other
equitable remedies (the exceptions set forth in (i) and (ii), the “Enforceability Exceptions”).

resolutions, among other things, authorizing and approving each of the Transaction Agreements and the Transactions.

(c) On or prior to the date hereof, the Board of Directors of the Company (the “Board”) has duly adopted

4.5 No Conflicts. Except as set forth in a written notice provided by the Company to the Share Acquiror prior to the
execution  of  this  Agreement  and  referencing  this  Section  4.5,  the  execution,  delivery  and  performance  of  this  Agreement,  and
compliance with the provisions hereof, and the issuance of the Shares by the Company do not and shall not: (a) subject to receipt of
the Required Approvals, violate any provision of applicable Law or any ruling, writ, injunction, order, permit, judgment or decree
of any Governmental Authority to which the Company is subject, (b) result in any encumbrance upon any of the Shares, other than
restrictions on resale pursuant to securities laws or as set forth in this Agreement, (c) result in a default, modification, acceleration
of  payment  or  termination  under,  give  any  Person  a  right  of  termination  or  cancellation  under,  result  in  the  loss  of  a  benefit  or
imposition of any obligation under, any Material Contract, or (d) violate or conflict with any of the provisions of the Organizational
Documents,

except, in the case of subsections (a) and (c) as would not, individually or in the aggregate, constitute a Material Adverse Effect.

4.6  No  Approval.  No  consent,  approval,  authorization  or  other  order  of,  or  filing  with,  or  notice  to,  any
Governmental  Authority  is  required  to  be  obtained  or  made  by  the  Company  or  any  of  its  Subsidiaries  in  connection  with  the
authorization,  execution  and  delivery  by  the  Company  of  this  Agreement  or  with  the  authorization,  issuance  and  sale  by  the
Company of the Shares, or the consummation of the Transactions, except (a) such filings as may be required to be made with the
Securities and Exchange Commission (the “SEC”) and with any state blue sky or securities regulatory authority, which filings shall
be made in a timely manner in accordance with all applicable Laws; (b) as required pursuant to the HSR Act; and (c) those that
have  been  made  or  obtained  prior  to  the  date  of  this  Agreement  (the  items  referred  to  in  clauses  (a)  and  (c),  the  “Required
Approvals”).

4.7 Valid Issuance of Shares. When issued, sold and delivered at the Closing in accordance with the terms hereof,
the Shares will be duly authorized, validly issued, fully paid and nonassessable, free from any liens, encumbrances or restrictions
on  transfer,  including  preemptive  rights,  rights  of  first  refusal,  purchase  option,  call  option,  subscription  right  or  other  similar
rights, other than as arising pursuant to this Agreement, as a result of any action by the Share Acquiror or under federal or state
securities Laws. Assuming the accuracy of the representations and warranties of the Share Acquiror in this Agreement and subject
to the Required Approvals, the Shares will be issued in compliance with all applicable federal and state securities Laws. No stop
order or suspension of trading of Common Stock has been imposed by Nasdaq or the SEC and remains in effect.

4.8  Nasdaq  Listing.  The  Common  Stock  is  listed  on  Nasdaq  and  registered  pursuant  to  Section  12(b)  of  the
Exchange Act, and the Company has taken no action (a) designed to terminate or reasonably likely to cause the termination of the
registration of the Common Stock under the Exchange Act and the Company has not received any written notification that the SEC
is contemplating terminating such registration or (b) designed to delist or reasonably likely to cause the delisting of the Common
Stock from Nasdaq. There are no proceedings pending or, to the knowledge of the Company, threatened to revoke or suspend the
Company’s  listing  on  Nasdaq  or  the  listing  of  the  Shares.  The  Company  is  in  compliance  in  all  material  respects  with  the
requirements of Nasdaq for continued listing of Common Stock thereon.

4.9 Company SEC Reports.

(a) The Company has timely filed or furnished, as applicable, all reports, schedules, forms, statements and
other documents required to be filed or furnished by it with the SEC since January 1, 2019, pursuant to the reporting requirements
of the Exchange Act (all of the foregoing filed prior to the date of this Agreement and all exhibits included therein and financial
statements  and  schedules  thereto  and  documents  (other  than  exhibits)  incorporated  by  reference  therein,  collectively,  the
“Company SEC Reports”), each of which complied at the time of filing in all material respects with all applicable requirements of
the Securities Act and the Exchange Act, as applicable, in each case as in effect on the

dates  such  forms  reports  and  documents  were  filed.  As  of  its  respective  date,  and  if  amended,  as  of  the  date  of  the  last  such
amendment,  no  Company  SEC  Report,  since  January  1,  2019,  when  filed,  contained  any  untrue  statement  of  a  material  fact  or
omitted  to  state  a  material  fact  required  to  be  stated  therein  or  necessary  in  order  to  make  the  statements  therein,  in  light  of  the
circumstances under which they were made, not misleading. All Material Contracts to which the Company or any Subsidiary is a
party, or to which the property or assets of the Company or any Subsidiary are subject, that are required to be included as part of or
specifically  identified  in  the  Company  SEC  Reports,  are  so  included  or  specifically  identified.  True  and  complete  copies  of  the
Company SEC Reports are available for public access via the SEC’s EDGAR system.

(b)  As  of  their  respective  dates,  the  consolidated  financial  statements  included  or  incorporated  in  the
Company  SEC  Reports  (the  “Financial  Statements”),  and  the  related  notes,  complied  as  to  form  in  all  material  respects  with
applicable  accounting  requirements  and  the  published  rules  and  regulations  of  the  SEC  with  respect  thereto.  The  Financial
Statements  and  the  related  notes  have  been  prepared  in  accordance  with  accounting  principles  generally  accepted  in  the  United
States  (“GAAP”),  consistently  applied,  during  the  periods  involved  (except  (i)  as  may  be  otherwise  indicated  in  the  Financial
Statements or the notes thereto, or (ii) in the case of unaudited interim statements, to the extent they may not include footnotes, may
be condensed or summary statements or may conform to the SEC’s rules and instructions for Quarterly Reports on Form 10-Q) and
fairly present in all material respects the consolidated financial position and the results of the operations of the Company and its
Subsidiaries,  retained  earnings  (loss),  and  cash  flows,  as  the  case  may  be,  for  the  periods  then  ended  (subject,  in  the  case  of
unaudited statements, to normal and recurring year-end audit adjustments).

(c) The Company has established and maintains disclosure controls and procedures (as defined in Rules 13a-
15 and 15d-15 under the Exchange Act) that (i) are designed to ensure that material information relating to the Company, including
each  consolidated  Subsidiary,  is  made  known  to  the  Company’s  principal  executive  officer  and  its  principal  financial  officer  by
others within those entities, particularly during the periods in which the periodic reports required under the Exchange Act are being
prepared; (ii) have been evaluated by management of the Company for effectiveness as of the end of the Company’s most recent
fiscal quarter; and (iii) are effective in all material respects to perform the functions for which they were established. Since the end
of  the  Company’s  most  recent  audited  fiscal  year,  there  have  been  no  significant  deficiencies  or  material  weaknesses  in  the
Company’s internal control over financial reporting (whether or not remediated) and no change in the Company’s internal control
over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company’s internal control over
financial reporting.

4.10 No Undisclosed Material Liabilities. The Company does not have any liabilities or obligations of any nature
(whether accrued, absolute, contingent or otherwise) required to be reflected or reserved against on a consolidated balance sheet of
the Company prepared in accordance with GAAP or the notes thereto, except for liabilities or obligations (a) reflected or reserved
against on the most recent

consolidated balance sheet of the Company included in the Company SEC Reports or the notes thereto, or (b) incurred since the
date of such balance sheet in the ordinary course of business.

4.11 Material Contracts. Except as set forth in a written notice provided by the Company to the Share Acquiror prior
to the execution of this Agreement and referencing this Section 4.11, each Material Contract of the Company is in the Company
SEC Reports. Each Material Contract is the legal, valid and binding obligations of the Company, enforceable against the Company
in accordance with their respective terms, and, to the knowledge of the Company, are valid and binding obligations of the other
party  thereto,  enforceable  against  each  other  party  thereto  in  accordance  with  its  terms,  except  as  limited  by  the  Enforceability
Exceptions. There has not occurred any breach, violation or default or any event that, with the lapse of time, the giving of notice or
the election of any Person, or any combination thereof, would constitute a breach, violation or default by the Company under any
such Material Contract or, to the knowledge of the Company, by any other Person to any such Material Contract. The Company has
not been notified that any Third Party to any Material Contract intends to cancel, terminate, not renew or exercise an option under
any Material Contract, whether in connection with the Transactions or otherwise.

4.12 Voting Rights. Other than as provided by this Agreement or any Contract or other document listed as an exhibit
to a Company SEC Report, there are no provisions in the Organizational Documents or any Contract to which the Company or any
Subsidiary is a party that (a) would reasonably be expected to affect or restrict the voting rights of the Share Acquiror with respect
to the Shares in its capacity as a stockholder of the Company, (b) would reasonably be expected to adversely affect the Company’s
or the Share Acquiror’s right or ability to consummate the Transactions or comply with the terms of this Agreement, (c) require the
vote  of  more  than  a  majority  of  the  Company’s  issued  and  outstanding  Common  Stock  to  take  or  prevent  any  corporate  action,
other than those matters requiring a different vote under Delaware law or (d) entitle any party to nominate or elect any director of
the  Company  or  require  any  of  the  Company’s  stockholders  to  vote  for  any  such  nominee  or  other  Person  as  a  director  of  the
Company.

4.13  No  Integrated  Offering.  Neither  the  Company,  nor  any  of  its  Affiliates  or  any  other  Person  acting  on  the
Company’s behalf, has directly or indirectly engaged in any form of general solicitation or general advertising with respect to the
Shares nor have any of such Persons made any offers or sales of any security of the Company or its Affiliates or solicited any offers
to buy any security of the Company or its Affiliates under circumstances that would require registration of the Shares under the
Securities Act or cause this offering of Shares to be integrated with any prior offering of securities of the Company for purposes of
the Securities Act or any applicable shareholder approval provisions of any Trading Market on which any of the securities of the
Company are listed or designated, nor will the Company take any action or steps that would cause the offering or issuance of the
Shares to be integrated with other offerings.

4.14 Offering; Exemption. Assuming the accuracy of the Share Acquiror’s representations and warranties set forth in

Section 5, no registration under the Securities Act or any applicable state securities

law is required for the offer and sale of the Shares by the Company to the Share Acquiror as contemplated hereby.

4.15 Legal Proceedings and Liabilities. Neither the Company nor any of its Subsidiaries is a party to any, and there
are  no  pending,  or  to  the  knowledge  of  the  Company,  threatened,  material  legal,  administrative,  arbitral  or  other  proceedings,
claims, actions or governmental investigations of any nature against the Company or any of its Subsidiaries. Neither the Company
nor  any  of  its  Subsidiaries  is  subject  to  any  order,  judgment  or  decree  of  a  Governmental  Authority.  To  the  knowledge  of  the
Company, there is no material investigation pending or threatened by any Governmental Authority with respect to the Company or
any of its Subsidiaries.

4.16 Taxes and Tax Returns.

(a) The Company and each of its Subsidiaries has timely filed (taking into account all applicable extensions)
all Tax Returns with respect to income taxes and all other material Tax Returns required to be filed by it, and all such Tax Returns
were correct and complete in all material respects, and the Company and each of its Subsidiaries has paid (or has had paid on its
behalf) to the appropriate Governmental Authority all material Taxes that are required to be paid by it, except, in each case, with
respect to matters contested in good faith and for which adequate reserves have been established in accordance with GAAP. There
are  no  disputes  pending,  or  claims  asserted  in  writing,  in  respect  of  Taxes  of  the  Company  or  any  of  its  Subsidiaries  for  which
reserves that are adequate under GAAP have not been established.

(b) The Company has not been a United States real property holding company within the meaning of Section
897(c)(2) of the Internal Revenue Code of 1986, as amended (the “Code”) during the period specified in Section 897(c)(1)(A)(ii)
of the Code.

4.17 Intellectual Property Matters. Except as otherwise disclosed in the Company SEC Reports, the Company and its
subsidiaries own, or have obtained valid and enforceable licenses for, the inventions, patent applications, patents, trademarks, trade
names,  service  names,  copyrights,  trade  secrets  and  other  intellectual  property  described  in  the  Company  SEC  Reports  as  being
owned  or  licensed  by  them  or  which  are  necessary  for  the  conduct  of  their  respective  businesses  as  currently  conducted  or  as
currently  proposed  to  be  conducted  (collectively,  “Intellectual  Property”).  Except  as  otherwise  disclosed  in  the  Company  SEC
Reports,  to  the  Company’s  knowledge:  (i)  there  are  no  third  parties  who  have  rights  to  any  Intellectual  Property,  except  for
customary reversionary rights of third-party licensors with respect to Intellectual Property that is disclosed in the Company SEC
Reports as exclusively licensed to the Company or one or more of its subsidiaries; and (ii) there is no infringement by third parties
of any Intellectual Property. Except as otherwise disclosed in the Company SEC Reports, there is no pending or, to the Company’s
knowledge, threatened action, suit, proceeding or claim by others: (A) challenging the Company’s rights in or to any Intellectual
Property, and the Company is unaware of any facts which would form a reasonable basis for any such action, suit, proceeding or
claim; (B) challenging the validity,

enforceability or scope of any Intellectual Property, and the Company is unaware of any facts which would form a reasonable basis
for any such action, suit, proceeding or claim; or (C) asserting that the Company or any of its subsidiaries infringes or otherwise
violates,  or  would,  upon  the  commercialization  of  any  product  or  service  described  in  the  Company  SEC  Reports  as  under
development, infringe or violate, any patent, trademark, trade name, service name, copyright, trade secret or other proprietary rights
of others, and the Company is unaware of any facts which would form a reasonable basis for any such action, suit, proceeding or
claim.

4.18 Absence of Changes. Since December 31, 2018, except as set forth in subsequent Company SEC Reports, there

has not been:

(a) any declaration, setting aside or payment of any dividend or other distribution with respect to any shares
of capital stock of the Company or any repurchase, redemption or other acquisition by the Company of any outstanding shares of
its capital stock;

(b) any material Tax election made or changed, any audit settled or any amended Tax Returns filed;

be expected to have a Material Adverse Effect;

(c) any damage, destruction or loss (whether or not covered by insurance) that has had or would reasonably

(d) any sale, assignment or transfer, or any Contract to sell, assign or transfer, any material asset, liability,
property, obligation or right of the Company or any Subsidiary to any Person, including, without limitation, the Share Acquiror and
its Affiliates, in each case, other than in the ordinary course of business;

any Subsidiary to any of its or their Affiliates, other than expenses allowable in the ordinary course of business of the Company;

(e) any material obligation or liability incurred, or any material loans or advances made, by the Company or

property, rights or assets other than in the ordinary course of business of the Company;

(f)  any  purchase  or  acquisition  of,  or  Contract,  plan  or  arrangement  to  purchase  or  acquire,  any  material

(g) any material waiver of any material rights or claims of the Company or any Subsidiary;

(h)  any  material  lien  upon,  or  adversely  affecting,  any  material  property  or  other  material  assets  of  the

Company or any Subsidiary;

(i) any Contract or commitment by the Company or any Subsidiary to do any of the foregoing; or

a Material Adverse Effect.

(j) any other change, development, occurrence or event that has had or would reasonably be expected to have

4.19 Compliance with Laws. Since January 1, 2019, except as set forth in subsequent Company SEC Reports, (a) the
Company  and  its  Subsidiaries  have  complied  in  all  material  respects  with  all  applicable  Laws  and  (b)  to  the  knowledge  of  the
Company, neither the Company nor any of its Subsidiaries has been investigated with respect to, or has been threatened in writing
to be charged with, or given notice of any violation in any material respect of, any applicable Law.

4.20 Foreign Corrupt Practices Act. Neither the Company nor any of its Subsidiaries nor, to the knowledge of the
Company, any director, officer, agent, employee or other Person acting on behalf of the Company or any of its Subsidiaries has, in
the course of its actions for, or on behalf of, the Company or any of its Subsidiaries (a) used any corporate funds for any unlawful
contribution, gift, entertainment or other unlawful expenses relating to political activity; (b) made any direct or indirect unlawful
payment to any domestic government official, “foreign official” (as defined in the U.S. Foreign Corrupt Practices Act of 1977, as
amended, and the rules and regulations thereunder (collectively, the “FCPA”)) or employee from corporate funds; (c) violated or is
in  violation  of  any  provision  of  the  FCPA  or,  to  the  knowledge  of  the  Company,  any  applicable  non-U.S.  anti-bribery  statute  or
regulation; or (d) made any unlawful bribe, rebate, payoff, influence payment, kickback or other unlawful payment to any domestic
government  official,  such  foreign  official  or  employee.  The  Company  and  its  Subsidiaries  have  conducted  their  respective
businesses in compliance with the FCPA and have instituted and maintain policies and procedures designed to ensure, and that are
reasonably expected to continue to ensure, continued compliance therewith.

4.21 Money Laundering Laws. The operations of the Company and its Subsidiaries are, and have been conducted at
all  times,  in  compliance  with  applicable  financial  recordkeeping  and  reporting  requirements  of  the  Currency  and  Foreign
Transactions  Reporting  Act  of  1970,  as  amended,  and  to  the  knowledge  of  the  Company,  the  money  laundering  statutes  of  all
applicable jurisdictions, the rules and regulations thereunder and any related or similar applicable rules, regulations or guidelines,
issued, administered or enforced by any Governmental Authority (collectively, the “Money Laundering Laws”).

4.22 OFAC. Neither the Company nor any of its Subsidiaries nor, to the knowledge of the Company, any director,
officer,  agent,  employee  or  Person  acting  on  behalf  of  the  Company  or  any  of  its  Subsidiaries  is  currently  subject  to  any  U.S.
sanctions administered by the Office of Foreign Assets Control of the U.S. Treasury Department (“OFAC”); and the Company will
not directly or indirectly use the proceeds from the sale of the Shares, or lend, contribute or otherwise make available such proceeds
to any Subsidiary or any joint venture partner or other Person, for the purpose of financing the activities of or business with any
Person, or in any country or territory, that currently is subject to any U.S. sanctions administered by OFAC or in any other manner
that will result in a violation by any Person (including any Person participating in the transaction whether as Underwriter, advisor,
investor or otherwise) of U.S. sanctions administered by OFAC.

4.23 Preclinical and Clinical Data and Regulatory Compliance. The preclinical tests and clinical trials (collectively,
“Studies”) that are described in, or the results of which are referred to in, the Company SEC Reports were and, if still pending, are
being conducted in all material respects in accordance with the protocols, procedures and controls designed and approved for such
Studies. Except as set forth in the Company SEC Reports, neither the Company nor any Subsidiary has received any written notice
of,  or  correspondence  from,  any  Regulatory  Authority  or  institutional  review  board  requiring  the  termination,  suspension  or
material  modification  of  any  Studies  that  are  described  or  referred  to  in  the  Company  SEC  Reports  and  the  Company  and  each
Subsidiary  have  operated  and  currently  are  in  compliance  in  all  material  respects  with  applicable  Laws,  rules,  regulations  and
policies  of  the  federal,  state,  local  or  foreign  agencies  or  bodies  engaged  in  the  regulation  of  pharmaceuticals  and  biological
products  such  as  those  being  developed  by  the  Company  (collectively,  “Regulatory  Authorities”),  including  current  Good
Laboratory Practices and current Good Clinical Practices.

4.24 Regulatory Permits. Except as set forth in the Company SEC Reports, (a) the Company and each Subsidiary
have  such  material  permits,  licenses,  certificates,  approvals,  clearances,  authorizations  or  amendments  thereto  (the  “Regulatory
Permits”) issued by the appropriate federal, state, local or foreign regulatory agencies or bodies necessary to conduct the business
of  the  Company  as  currently  conducted  and  as  described  in  the  Company  SEC  Reports,  including,  without  limitation,  any
Investigational New Drug Application as required by the United States Food and Drug Administration (“FDA”) or authorizations
issued  by  Regulatory  Authorities;  (b)  the  Company  and  each  Subsidiary  are  in  compliance  in  all  material  respects  with  the
requirements of the Regulatory Permits, and all of the Regulatory Permits are valid and in full force and effect, in each case in all
material respects; (c) the Company has not received any notice of proceedings relating to the revocation, termination, modification
or impairment of any of the Regulatory Permits; (d) neither the Company nor any Subsidiary has failed to file with the FDA or any
other Regulatory Authority any material required application, submission, report, document, notice, supplement or amendment, and
all such filings were in material compliance with applicable Laws when filed and have been supplemented as necessary to remain
in material compliance with applicable Laws and no material deficiencies have been asserted by the FDA or any other Regulatory
Authority with respect to any such filings.

4.25  Related-Party  Transactions.  Except  as  set  forth  in  the  Company  SEC  Reports,  there  are  no  business
relationships or related-party transactions involving the Company or any Subsidiary or any other Person of the type required to be
disclosed in the Company SEC Reports pursuant to Item 404 of Regulation S-K promulgated by the SEC.

4.26 Brokers’ or Finders’ Fees. No broker, finder, investment banker or other Person is entitled to any brokerage,

finder’s or other fee or commission from the Company in connection with the Transactions.

4.27 Not Investment Company. The Company is not, and immediately after the consummation of the Transactions,

will not be, an “investment company” as defined in the Investment Company Act of 1940, as amended.

4.28 No Registration Rights. Except as set forth in the Company’s SEC Documents or in a written notice provided
by the Company to the Share Acquiror prior to the execution of this Agreement and referencing this Section 4.28, (a) no Person has
the right to (i) prohibit the Company from filing a Registration Statement or (ii) require the Company to register any securities for
sale under the Securities Act by reason of the filing of a Registration Statement, except in the case of clause (ii) for rights which
have been properly satisfied or waived; and (b) the granting and performance of the registration rights under this Agreement will
not  violate  or  conflict  with,  or  result  in  a  breach  of  any  provision  of,  or  constitute  a  default  under,  any  Contract  to  which  the
Company is a party.

4.29 Certain Employee Matters. No officer or employee of the Company, to the knowledge of the Company, is, or is
now  expected  to  be,  in  material  violation  of  any  material  term  of  any  employment  contract,  confidentiality,  disclosure  or
proprietary  information  agreement  or  non-competition  agreement,  or  any  other  Contract  or  any  restrictive  covenant,  and  the
continued employment of each such officer or employee does not subject the Company or any Subsidiary to any material liability
with respect to any of the foregoing matters, except as would not reasonably be expected to result in a Material Adverse Effect.

5.  Representations  and  Warranties  of  the  Share  Acquiror.  The  Share  Acquiror  hereby  represents  and  warrants  to  the

Company as of the date hereof and as of the Closing Date as follows:

5.1 Organization. The Share Acquiror is a public limited liability company duly organized, validly existing and in
good standing under the laws of Denmark. The Share Acquiror has all requisite power and authority to enter into this Agreement, to
purchase the Shares and to perform its obligations under and to carry out the Transactions.

5.2 Authorization. All requisite corporate or other comparable action on the part of the Share Acquiror, required by
applicable Law for the authorization, execution and delivery by the Share Acquiror of this Agreement and the performance of all of
its  obligations  hereunder,  including  the  acquisition  of  the  Shares,  has  been  taken.  This  Agreement  has  been  duly  executed  and
delivered by the Share Acquiror, and upon the due execution and delivery thereof by the Company, will constitute valid and legally
binding obligations of the Share Acquiror, enforceable against the Share Acquiror in accordance with its terms, except as limited by
the Enforceability Exceptions.

5.3 No Conflicts. The execution, delivery and performance of this Agreement and compliance with the provisions
thereof,  by  the  Share  Acquiror  do  not  and  shall  not:  (a)  violate  any  provision  of  applicable  Law  or  any  ruling,  writ,  injunction,
order, permit, judgment or decree of any Governmental Authority, or (b) violate or conflict with any of the provisions of the Share
Acquiror’s  organizational  documents  (including  any  articles  or  memoranda  of  organization  or  association,  charter,  by-laws  or
similar

documents),  except  as  would  not  materially  impair  or  affect  in  a  material  adverse  manner  the  ability  of  the  Share  Acquiror  to
consummate the Transactions and perform its obligations under this Agreement.

5.4 No Approval. No consent, approval, authorization or other order of any Governmental Authority is required to
be obtained by the Share Acquiror in connection with the authorization, execution and delivery of any of this Agreement or with
the subscription for and purchase of the Shares, except as required pursuant to the HSR Act.

5.5 Acquisition  Entirely  for  Own  Account.  The  Shares  shall  be  acquired  for  investment  for  the  Share  Acquiror’s
own account, not as a nominee or agent, and not with a view to the resale or distribution of any part thereof, and the Share Acquiror
has  no  present  intention  of  selling,  granting  any  participation  or  otherwise  distributing  the  Shares.  The  Share  Acquiror  does  not
have  and  will  not  have  as  of  the  Closing  any  Contract,  undertaking  or  arrangement  with  any  Person  to  sell,  transfer  or  grant
participation to a Person any of the Shares.

5.6  Investment  Experience  and  Accredited  Investor  Status.  The  Share  Acquiror  is  an  “accredited  investor”  (as
defined in Regulation D under the Securities Act). The Share Acquiror has conducted its own due diligence on the Company to its
satisfaction and has such knowledge and experience in financial or business matters that it is capable of evaluating the merits and
risks  of  the  investment  in  the  Shares  to  be  purchased  hereunder.  The  Share  Acquiror  acknowledges  and  understands  that  its
investment in the Shares involves a significant degree of risk. The Share Acquiror is able to bear the economic risk of holding the
Shares  for  an  indefinite  period.  The  Share  Acquiror  has,  in  connection  with  the  Share  Acquiror’s  decision  to  subscribe  for  the
Shares, not relied upon any representations, warranties or other information (whether oral or written) of or related to the Company
other than: (i) those representations and warranties of the Company specifically set forth herein and (ii) the information contained
in the Company SEC Reports. The Share Acquiror understands that nothing in this Agreement or any other materials presented by
or  on  behalf  of  the  Company  to  the  Share  Acquiror  in  connection  with  the  purchase  of  the  Shares  constitutes  legal,  tax  or
investment  advice.  The  Share  Acquiror  has  consulted  such  legal,  tax  and  investment  advisors  as  it,  in  its  sole  discretion,  has
deemed necessary or appropriate in connection with its purchase of the Shares.

5.7  Restricted  Securities.  The  Share  Acquiror  understands  that  the  Shares,  when  issued,  will  be  “restricted
securities” under the federal securities laws inasmuch as they are being acquired from the Company in a transaction not involving a
public  offering  and  that  under  such  Laws  the  Shares  may  be  resold  without  registration  under  the  Securities  Act  only  in  certain
limited circumstances. The Share Acquiror represents that it is familiar with Rule 144.

5.8 Legends. In addition to any other legend required by Law, the book-entry or certificated form of the Shares shall

bear any legend required by the “blue sky” laws of any state and a restrictive legend in substantially the following form:

THESE  SECURITIES  HAVE  NOT  BEEN  REGISTERED  UNDER  THE  SECURITIES  ACT  OF  1933,  AS  AMENDED.
THEY  MAY  NOT  BE  SOLD,  OFFERED  FOR  SALE,  PLEDGED  OR  HYPOTHECATED  IN  THE  ABSENCE  OF  A
REGISTRATION  STATEMENT  IN  EFFECT  WITH  RESPECT  TO  THE  SECURITIES  UNDER  SUCH  ACT  OR  AN
OPINION OF COUNSEL SATISFACTORY TO THE ISSUER THAT SUCH REGISTRATION IS NOT REQUIRED OR
UNLESS SOLD PURSUANT TO RULE 144 OF SUCH ACT.

5.9  Acquiring  Person.  As  of  the  date  of  this  Agreement  and  immediately  prior  to  the  Closing,  neither  the  Share
Acquiror nor any of its controlled Affiliates (excluding directors and officers of the Share Acquiror who may hold securities of the
Company for their personal account) Beneficially Owns, or will Beneficially Own any securities of the Company.

5.10 United States Person. If the Share Acquiror is not a United States person (as defined by Section 7701(a)(30) of
the Internal Revenue Code), the Share Acquiror hereby represents that it has satisfied itself as to the full observance of the laws of
its jurisdiction in connection with any invitation to subscribe for the Shares or any use of this Agreement, including (i) the legal
requirements within its jurisdiction for the purchase of the Shares, (ii) any foreign exchange restrictions applicable to such
purchase, (iii) any governmental or other consents that may need to be obtained, and (iv) the income tax and other tax
consequences, if any, that may be relevant to the purchase, holding, redemption, sale, or transfer of the Shares. The Share
Acquiror’s subscription and payment for and continued beneficial ownership of the Shares will not violate any applicable securities
or other laws of the Share Acquiror’s jurisdiction.

5.11 No General Solicitation. The Share Acquiror is not acquiring the Shares as a result of (a) any advertisement,
article, notice or other communication published in any newspaper, magazine or similar media or broadcast over television, radio or
the Internet, in each case, relating to the Company, or (ii) any seminar or meeting whose attendees, including the Share Acquiror,
have been invited by any general solicitation or general advertising related to the Company.

5.12  Information.  The  Share  Acquiror  has  had  the  opportunity  to  review  the  Company  SEC  Reports.  The  Share
Acquiror has been afforded the opportunity to ask questions of the Company regarding the Company, including without limitation,
all aspects of the Company’s business, operations, financial condition, prospects, intellectual property and pending disputes. The
Share Acquiror further acknowledges that it has had the opportunity to ask such questions as it has deemed necessary of, and to
receive answers from, representatives of the Company concerning the terms and conditions of the offering of the Securities and the
merits and risks of investing in the Securities. Neither such inquiries nor any other investigation conducted by or on behalf of the
Share  Acquiror  or  its  representatives  or  counsel  shall  modify,  amend  or  affect  the  Share  Acquiror’s  right  to  rely  on  the  truth,
accuracy  and  completeness  of  the  Company  SEC  Reports  and  the  Company’s  representations  and  warranties  contained  in  this
Agreement, it being agreed that the Company has made and does not make any representations or warranties to the Share Acquiror
except  as  expressly  set  forth  herein.  The  Share  Acquiror  understands  that  no  United  States  federal  or  state  agency  or  any  other
government or governmental agency has passed upon or made any recommendation

or endorsement of the Shares or the fairness or suitability of the investment in the Shares nor have such authorities passed upon or
endorsed the merits of the offering of the Shares.

5.13  No  Short  Sales.  Between  the  time  the  Share  Acquiror  learned  about  the  Transactions  and  the  public
announcement  of  thereof,  neither  the  Share  Acquiror  nor  any  Affiliate  of  the  Share  Acquiror  which  (x)  had  knowledge  of  the
Transactions,  (y)  has  or  shares  discretion  relating  to  the  Share  Acquiror’s  investments  or  trading  or  information  concerning  the
Share  Acquiror’s  investments,  including  in  respect  of  the  Shares,  and  (z)  is  subject  to  the  Share  Acquiror’s  review  or  input
concerning  such  Affiliate’s  investments  or  trading,  has  effected  or  agreed  to  effect  any  purchases  or  sales  of  the  Company’s
Common  Stock  or  engaged  in  any  short  sales  or  similar  transactions  with  respect  to  the  Company’s  Common  Stock  or  any
derivative  thereof,  nor  has  the  Share  Acquiror,  directly  or  indirectly,  caused  any  Person  to  engage  in  any  short  sales  or  similar
transactions  with  respect  to  the  Company’s  Common  Stock  or  any  derivative  thereof,  including,  without  limitation,  and  in  each
case, in any transaction aimed, directly or indirectly, at affecting the price of the Company’s Common Stock for purposes of the
transactions contemplated by this Agreement.

6. Covenants.

6.1 Reasonable Best Efforts. Subject to the terms and conditions set forth in this Agreement, each party hereto shall
use its reasonable best efforts to do or cause to be done all things necessary or appropriate to satisfy the conditions to the Closing
and to consummate the Transactions as promptly as practicable. Without limiting the generality of the foregoing, unless the License
Agreement is earlier terminated by either party in accordance with its terms, the Company and the Share Acquiror shall use their
respective reasonable best efforts to cause the Closing to occur. Each of the Company and the Share Acquiror shall not, and shall
not permit any of their respective Affiliates to, take any action that would, or that would reasonably be expected to, result in any of
the conditions set forth in Section 7 or Section 8 not being satisfied.

6.2 Notification under the HSR Act. The parties shall make, or cause to be made, the filings required of them under

the HSR Act in connection with the Transactions and shall take related actions as provided in the License Agreement.

6.3 Lock-Up. During the period commencing on the Closing Date and until the date that is nine (9) months after the
Closing Date (the “Lockup Period”), without the prior approval of the Company, the Share Acquiror shall not Dispose of (x) any
of the Shares, together with any shares of Common Stock issued in respect thereof as a result of any stock split, stock dividend,
share  exchange,  merger,  consolidation  or  similar  recapitalization,  and  (y)  any  Common  Stock  issued  as  (or  issuable  upon  the
exercise of any warrant, right or other security that is issued as) a dividend or other distribution with respect to, or in exchange or in
replacement of, the shares of Common Stock described in clause (x) of this sentence (collectively, “Lockup Shares”);  provided,
however,  that  the  foregoing  shall  not  prohibit  (a)  the  Share  Acquiror  from  transferring  any  Lockup  Shares  to  (i)  a  Permitted
Transferee (provided, that the Permitted

Transferee agrees to be bound in writing by the restrictions set forth herein), or (ii) to the Company; (b) the Disposition of Lockup
Shares  with  the  prior  written  consent  of  the  Company;  and  (c)  the  Disposition  of  Lockup  Shares  pursuant  to  a  Third  Party
Tender/Exchange Offer, as defined below, and any Disposition effected pursuant to any merger, consolidation or similar transaction
consummated by the Company. “Third  Party  Tender/Exchange  Offer”  means  any  tender  or  exchange  offer  made  to  all  of  the
holders of shares of Common Stock by a Third Party (other than a Third Party acting on behalf of or as part of a group or in concert
with the Share Acquiror) solely to the extent that the Board has recommended such tender or exchange offer in a Schedule 14D-9
under the Exchange Act. For the avoidance of doubt, nothing in this Section 6.3 will restrict any Disposition of shares of Common
Stock held by an executive officer or director of the Share Acquiror for his or her personal account.

6.4  Registration  Rights.  In  the  event  the  Shares  as  of  the  Closing  Date  equal  or  exceed  10%  of  the  Company’s
outstanding Common Stock, the Company hereby provides the Share Acquiror with the registration rights set forth on Appendix 1
attached hereto, which is hereby incorporated in and made a part of this Agreement as if set forth in full herein.

6.5 Participation Rights. If the Share Acquiror agrees to enter into a customary confidentiality agreement with the
Company, for so long as the Share Acquiror holds one hundred percent (100%) of the Shares and such Shares equal or exceed at
least five percent (5%) of the Company’s outstanding shares of Common Stock, the Company will use its commercially reasonable
efforts  to  allow  the  Share  Acquiror  to  participate  (pro  rata  with  its  percentage  ownership  of  the  outstanding  Common  Stock)  in
public  offerings  and  private  placements  of  its  Common  Stock  to  financial,  non-strategic  investors  primarily  for  capital  raising
purposes,  subject  to  any  limitations  (a)  imposed  by  the  Company’s  underwriters  or  investment  bankers  or  (b)  arising  under
securities or other applicable Laws; provided, that in no event will this Section 6.5 be deemed to provide the Share Acquiror with
any rights (i) to membership on, or observation of, the Board or any other special information rights or (ii) with respect to “at the
market” or “ATM” offerings.

6.6 Facilitation of Sales Pursuant to Rule 144. For as long as the Share Acquiror or its Affiliates Beneficially Owns
any Shares, to the extent it shall be required to do so under the Exchange Act, the Company shall use reasonable best efforts to
timely file the reports required to be filed by it under the Exchange Act or the Securities Act (including the reports under Sections
13 and 15(d) of the Exchange Act referred to in subparagraph (c)(1) of Rule 144), and, following expiration of the Lock-Up Period,
shall use reasonable best efforts to take such further necessary action as the Share Acquiror may reasonably request in connection
with  the  removal  of  any  restrictive  legend,  including  the  legend  set  forth  in  Section  5.8  of  this  Agreement,  on  the  Shares  (i)
following any sale of such Shares pursuant to Rule 144 or (ii) if such Shares are eligible for sale under Rule 144 without regard to
volume or manner-of-sale restrictions under Rule 144, all to the extent required from time to time to enable such holder to sell the
Shares without registration under the Securities Act within the limitations of the exemption provided by Rule 144. The Company
agrees that at such time as any legend set forth in Section 5.8 is no longer required under this Section 6.5, the Company will, no
later than two (2) Business Days following receipt from the Share

Acquiror by the Company and the Transfer Agent of customary representations and other documentation reasonably acceptable to
the Company and the Transfer Agent remove any such legend in the Company’s stock records. Notwithstanding the foregoing, the
Company shall not have any obligations pursuant to this Section 6.5 during any time when a Registration Statement covering the
Shares is effective.

6.7  Press  Release.  The  parties  have  mutually  approved  a  press  release  with  respect  to  this  Agreement  and  either
party may make subsequent public disclosure of the content of such press release. Subject to the foregoing, each party agrees not to
issue  any  press  release  or  other  public  statement,  whether  oral  or  written,  disclosing  the  terms  hereof  without  the  prior  written
consent of the other party; provided, however, that neither party will be prevented from complying with any duty of disclosure it
may have pursuant to applicable Laws or pursuant to the rules of any recognized stock exchange or quotation system.

6.8 Blue Sky. The Company shall take such action as the Company shall reasonably determine is necessary in order
to obtain an exemption, or to qualify the Shares, for sale to the Share Acquiror at the Closing under the applicable securities or
“Blue Sky” laws of the Commonwealth of Massachusetts, and shall provide evidence of such actions promptly upon request of the
Share Acquiror.

7.  Conditions  to  the  Company’s  Obligations.  The  obligations  of  the  Company  under  Section  2  hereof  are  subject  to  the
fulfillment prior to or on the Closing Date of all of the following conditions, any of which may be waived in whole or in part by the
Company.

7.1  Representations  and  Warranties.  The  representations  and  warranties  of  the  Share  Acquiror  contained  in  this
Agreement and in any certificate, if any, or other writing, if any, delivered by the Share Acquiror pursuant hereto shall be true and
correct in all material respects on and as of the Closing Date, except those representations and warranties qualified by materiality or
Material  Adverse  Effect,  which  representations  and  warranties  shall  be  true  and  correct  in  all  respects,  with  the  same  effect  as
though such representations and warranties had been made on and as of the Closing Date (except to the extent expressly made as of
an earlier date, in which case as of such earlier date).

7.2  Performance.  The  Share  Acquiror  shall  have  performed  and  complied  in  all  material  respects  with  all
agreements,  obligations  and  conditions  contained  in  this  Agreement  that  are  required  to  be  performed  or  complied  with  it  on  or
before the Closing.

7.3 HSR Act Qualification. The filings required under the HSR Act in connection with this Agreement shall have

been made and the required waiting period shall have expired or been terminated as of the Closing Date.

7.4 License Agreement. Each of the Company and the Share Acquiror shall have executed and delivered the License

Agreement, and the License Agreement shall not have been terminated and shall be effective in accordance with its terms.

8. Conditions to the Share Acquiror’s Obligations. The obligations of the Share Acquiror under Section 2 hereof are subject
to the fulfillment prior to or on the Closing Date of all of the following conditions, any of which may be waived in whole or in part
by the Share Acquiror.

8.1  Representations  and  Warranties.  The  representations  and  warranties  of  the  Company  contained  in  this
Agreement and in any certificate, if any, or other writing, if any, delivered by the Company pursuant hereto shall be true and correct
in  all  material  respects  on  and  as  of  the  Closing  Date,  except  those  representations  and  warranties  qualified  by  materiality  or
Material  Adverse  Effect,  which  representations  and  warranties  shall  be  true  and  correct  in  all  respects,  with  the  same  effect  as
though such representations and warranties had been made on and as of the Closing Date (except to the extent expressly made as of
an earlier date, in which case as of such earlier date).

8.2  Performance.  The  Company  shall  have  performed  and  complied  in  all  material  respects  with  all  agreements,
obligations  and  conditions  contained  in  this  Agreement  that  are  required  to  be  performed  or  complied  with  it  on  or  before  the
Closing.

8.3 HSR Act Qualification. The filings required under the HSR Act in connection with this Agreement shall have

been made and the required waiting period shall have expired or been terminated as of the Closing Date.

8.4 License Agreement. Each of the Company and the Share Acquiror shall have executed and delivered the License

Agreement, and the License Agreement shall not have been terminated and shall be effective in accordance with its terms.

8.5 No Stockholder Approval Required; Consents. No approval on the part of the stockholders of the Company shall
be  required  in  connection  with  the  execution  and  delivery  by  the  Company  of  this  Agreement  and  the  consummation  of  the
Transactions. All consents necessary or appropriate for the consummation of the transactions contemplated by this Agreement shall
have been obtained.

8.6  Qualification  Under  State  Securities  Laws.  All  registrations,  qualifications,  permits  and  approvals,  if  any,
required to be obtained prior to the Closing under applicable state securities laws shall have been obtained for the lawful execution,
delivery and performance of this Agreement or the other Transaction Agreements, including, without limitation, the offer and sale
of the Shares.

8.7 Nasdaq Matters.

(a) Prior to the Closing, the Company shall have taken all actions which are necessary, including providing
appropriate notice to Nasdaq of the Transactions and the filing of a Notification Form: Listing of Additional Shares, for the Shares
purchased at the Closing to remain listed on Nasdaq and shall have complied with all listing, reporting, filing and other obligations
under the rules of Nasdaq and of the SEC.

(b) The Common Stock shall not have been suspended, as of the Closing Date, by the SEC or Nasdaq from
trading on Nasdaq nor shall suspension by the SEC or Nasdaq have been threatened, as of the Closing Date, in writing by the SEC
or Nasdaq.

8.8 Absence of Litigation. No proceeding challenging the Transaction Agreements or the Transactions, or seeking to

prohibit, alter, prevent or materially delay the Closing, shall have been instituted by any Governmental Authority.

8.9 Company Deliverables. The Company shall have delivered or caused to be delivered to the Share Acquiror all of

the items set forth in Section 3.2(a) of this Agreement.

9. Termination.  This  Agreement  may  only  be  terminated  and  shall  automatically  terminate  if  the  License  Agreement  has
been terminated prior to the Closing Date in accordance with its terms. In the event of the termination of this Agreement pursuant
to this Section 9, (a) this Agreement (except for this Section 9) shall forthwith become void and have no effect, without any liability
on  the  part  of  any  party  hereto  or  its  Affiliates,  and  (b)  all  filings,  applications  and  other  submissions  made  pursuant  to  this
Agreement, to the extent practicable, shall be withdrawn from the agency or other Person to which they were made or appropriately
amended to reflect the termination of the Transactions; provided, however, that nothing contained in this Section 9 shall relieve any
party from liability for fraud or any intentional or willful breach of this Agreement.

10. Survival. The representations and warranties contained in this Agreement shall survive the Closing of the Transactions
until the date that is one (1) year following the date of this Agreement. The covenants and agreements contained in this Agreement
shall survive Closing of the Transactions. The rights and remedies that may be exercised by the Share Acquiror shall not be limited
or otherwise affected by or as a result of any information furnished to, or any investigation made by or knowledge of, the Share
Acquiror or its representatives.

11. Miscellaneous.

11.1 Governing Law; Submission to Jurisdiction. This Agreement shall be governed by and construed in accordance
with the Laws of the State of New York, without regard to the conflict of laws principles thereof that would require the application
of the Law of any other jurisdiction. Any action brought, arising out of, or relating to this Agreement shall, if it has jurisdiction, be
brought in the courts of the State of New York located in New York County or the United States District Court for the Southern
District  of  New  York.  Each  party  hereby  irrevocably  submits  to  the  exclusive  jurisdiction  of  said  Court  in  respect  of  any  claim
relating to the validity, interpretation and enforcement of this Agreement, and hereby waives, and agrees not to assert, as a defense
in any action, suit or proceeding in which any such claim is made that it is not subject thereto or that such action, suit or proceeding
may not be brought or is not maintainable in such courts, or that the venue thereof may not be appropriate or that this Agreement
may not be enforced in or by such courts. The parties hereby consent to and grant the courts of the State of New York located

in New York County and the United States District Court for the Southern District of New York jurisdiction over such parties and
over the subject matter of any such claim and agree that mailing of process or other papers in connection with any such action, suit
or proceeding in the manner provided in Section 11.3 hereof or in such other manner as may be permitted by Law, shall be valid
and sufficient thereof.

11.2 No Waiver, Modifications. It is agreed that no waiver by a party hereto of any breach or default of any of the
covenants or agreements set forth herein shall be deemed a waiver as to any subsequent or similar breach or default. The failure of
either  party  to  insist  on  the  performance  of  any  obligation  hereunder  shall  not  be  deemed  a  waiver  of  any  such  obligation.  No
amendment, modification, waiver, release or discharge to this Agreement shall be binding upon the parties unless in writing and
duly executed by authorized representatives of both parties.

11.3 Notices. Any consent, notice, report or other communication required or permitted to be given or made under
this Agreement by one of the parties to the other party will be delivered in writing by one of the following means and be effective:
(a) upon receipt, if delivered personally; (b) when sent, if sent via e-mail (provided that such sent e-mail is kept on file (whether
electronically or otherwise) by the sending party and the sending party does not immediately receive an automatically generated
message from the recipient’s e-mail server that such e-mail could not be delivered to such recipient); or (c) when delivered by a
reputable, commercial overnight courier; provided in all cases addressed to such other party at its address indicated below, or to
such other address as the addressee will have last furnished in writing to the addressor and will be effective upon receipt by the
addressee.

If to Share Acquiror:

Novo Nordisk A/S
Novo Alle 1
2880 Bagsvaerd
Denmark
Attention: CVP of Global Business Development

with a copy (which shall not constitute notice) to:

Novo Nordisk A/S
Novo Alle 1
2880 Bagsvaerd
Denmark
Attention: General Counsel

 
If to the Company:

Dicerna Pharmaceuticals, Inc. 
87 Cambridgepark Drive 
Cambridge, MA 02140 
Attention: Jack Green 
Facsimile: 617-612-6298 
e-mail: jgreen@dicerna.com

with a copy (which shall not constitute notice) to:

Goodwin Procter LLP 
601 Marshall Street 
Redwood City, California 94063 
Attention: Sam Zucker 
Facsimile: (650) 752-3100 
e-mail: szucker@goodwinlaw.com

Written confirmation of receipt (i) given by the recipient of such notice or (ii) provided by an overnight courier service shall be
rebuttable evidence of personal service, receipt by receipt from an overnight courier service in accordance with clause (a) or (c)
above,  respectively.  A  copy  of  the  e-mail  transmission  containing  the  time,  date  and  recipient  e-mail  address  shall  be  rebuttable
evidence of receipt by e-mail in accordance with clause (b) above.

11.4  Entire  Agreement.  This  Agreement  (including  all  exhibits,  schedules  and  annexes  attached  hereto)  and  the
License  Agreement  contain  the  entire  agreement  among  the  parties  with  respect  to  the  subject  matter  hereof  and  thereof  and
supersede all prior and contemporaneous arrangements or understandings, whether written or oral, with respect hereto and thereto.

11.5  Headings;  Nouns  and  Pronouns;  Section  References.  Headings  in  this  Agreement  are  for  convenience  of
reference only and shall not be considered in construing this Agreement. Whenever the context may require, any pronouns used
herein  shall  include  the  corresponding  masculine,  feminine  or  neuter  forms,  and  the  singular  form  of  names  and  pronouns  shall
include the plural and vice-versa. References in this Agreement to a section or subsection shall be deemed to refer to a section or
subsection of this Agreement unless otherwise expressly stated.

11.6 Severability. If any provision of this Agreement is held to be illegal, invalid or unenforceable under any present
or  future  Law,  (a)  such  provision  shall  be  fully  severable,  (b)  this  Agreement  shall  be  construed  and  enforced  as  if  such  illegal,
invalid or unenforceable provision had never comprised a part hereof, (c) the remaining provisions of this Agreement shall remain
in full force and effect and shall not be affected by the illegal, invalid or unenforceable provision or by its severance herefrom, and
(d) in lieu of such illegal, invalid or unenforceable provision, the parties shall negotiate in good faith a substitute

legal,  valid  and  enforceable  provision  as  similar  in  terms  to  such  illegal,  invalid  or  unenforceable  provision  as  possible  and  as
reasonably acceptable to the parties.

11.7 Assignment. Except for an assignment by the Share Acquiror of this Agreement or any rights hereunder to an
Affiliate or Permitted Transferee (which assignment will not relieve the Share Acquiror of any obligation hereunder), neither this
Agreement nor any of the rights or obligations hereunder may be assigned by either the Share Acquiror or the Company without (a)
the prior written consent of Company in the case of any assignment by the Share Acquiror or (b) the prior written consent of the
Share Acquiror in the case of an assignment by the Company.

11.8 Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the parties hereto and

their respective successors and permitted assigns.

11.9 Counterparts. This Agreement may be executed in counterparts, each of which shall be deemed an original but
which  together  shall  constitute  one  and  the  same  instrument.  In  the  event  that  any  signature  is  delivered  by  an  e-mail  which
contains a portable document format (.pdf) file of an executed signature page, such executed signature page shall create a valid and
binding obligation of the party executing it (or on whose behalf such signature page is executed) with the same force and effect as
if such executed signature page were an original thereof.

11.10 Third Party Beneficiaries. None of the provisions of this Agreement shall be for the benefit of or enforceable
by any Third Party, including any creditor of any party hereto, except that each Affiliate of the Share Acquiror is an express third
party beneficiary entitled to enforce this Agreement directly against the Company. No Third Party shall obtain any right under any
provision of this Agreement or shall by reason of any such provision make any claim in respect of any debt, liability or obligation
(or otherwise) against any party hereto.

11.11  No  Strict  Construction.  This  Agreement  has  been  prepared  jointly  and  will  not  be  construed  against  either
party. No presumption as to construction of this Agreement shall apply against either party with respect to any ambiguity in the
wording  of  any  provision(s)  of  this  Agreement  irrespective  of  which  party  may  be  deemed  to  have  authored  the  ambiguous
provision(s).

11.12  Remedies.  The  rights,  powers  and  remedies  of  the  parties  under  this  Agreement  are  cumulative  and  not
exclusive of any other right, power or remedy which such parties may have under any other Contract or Law. No single or partial
assertion or exercise of any right, power or remedy of a party hereunder shall preclude any other or further assertion or exercise
thereof. The parties hereby acknowledge and agree that the rights of the parties hereunder are special, unique and of extraordinary
character, and that if any party refuses or otherwise fails to act, or to cause its Affiliates to act, in accordance with the provisions of
this Agreement, such refusal or failure would result in irreparable injury to the Company or the Share Acquiror as the case may be,
the exact amount of which would be difficult to ascertain or estimate and the remedies at law for which would not be reasonable or
adequate compensation. Accordingly, if any

party refuses or otherwise fails to act, or to cause its Affiliates to act, in accordance with the provisions of this Agreement, then, in
addition to any other remedy which may be available to any damaged party at law or in equity, such damaged party will be entitled
to  seek  specific  performance  and  injunctive  relief,  without  posting  bond  or  other  security,  and  without  the  necessity  of  proving
actual or threatened damages, which remedy such damaged party will be entitled to seek in any court of competent jurisdiction.

11.13  Expenses.  Each  party  shall  pay  its  own  fees  and  expenses  in  connection  with  the  preparation,  negotiation,

execution, delivery and performance of the Transaction Agreements.

[Signature Page Follows]

IN WITNESS WHEREOF, the parties have executed and delivered this Agreement as of the date first above written.

Dicerna Pharmaceuticals, Inc., a Delaware corporation

By:     /s/ Douglas M. Fambrough                 
Name: Douglas M. Fambrough, III. Ph.D.
Title: Chief Executive Officer

Novo Nordisk A/S, a public limited liability company

By:     /s/ Karsten Munk Knudsen                 
Name: Karsten Munk Knudsen 
Title: Executive Vice President

By:     /s/ Mads Krogsgaard Thomsen                 
Name: Mads Krogsgaard Thomsen 
Title: Executive Vice President

 
APPENDIX 1

REGISTRATION RIGHTS

1. Resale Registration.

1.1 On or prior to the first (1st) Business Day following the expiration of the Lockup Period, the Company will file a
Shelf Registration Statement registering for resale the Registrable Securities under the Securities Act. The Company shall use its
commercially  reasonable  efforts  to  cause  such  Shelf  Registration  Statement  to  become  effective  as  promptly  as  practicable  after
filing. Until the earlier of such time as (i) all Registrable Securities cease to be Registrable Securities or (ii) the Company is no
longer  eligible  to  maintain  a  Shelf  Registration  Statement,  the  Company  will  keep  current  and  effective  such  Shelf  Registration
Statement  and  file  such  supplements  or  amendments  to  such  Shelf  Registration  Statement  (or  file  a  new  Shelf  Registration
Statement  when  such  preceding  Shelf  Registration  Statement  expires  pursuant  to  the  rules  of  the  SEC)  as  may  be  necessary  or
appropriate  in  order  to  keep  such  Shelf  Registration  Statement  continuously  effective  and  useable  for  the  resale  of  Registrable
Securities  under  the  Securities  Act.  The  Shelf  Registration  Statement  shall  include  the  Plan  of  Distribution  attached  hereto  as
Annex A.

1.2 If the filing, initial effectiveness or continued use of the Shelf Registration Statement at any time would require
the Company to make a public disclosure of material non-public information that the Company has a bona fide business purpose
for not disclosing publicly at such time, the Company may, upon giving prompt written notice of such action to the Share Acquiror,
delay the filing or initial effectiveness of, or suspend use of, the Shelf Registration Statement (a “Suspension”); provided, however,
that the Company shall not be permitted to exercise a Suspension more than once during any twelve (12) month period for a period
not to exceed sixty (60) days. In the case of a Suspension, the Share Acquiror agrees to suspend use of the applicable Prospectus in
connection  with  any  sale  or  purchase,  or  offer  to  sell  or  purchase,  Shares,  upon  receipt  of  the  notice  referred  to  above.  The
Company shall immediately notify the Share Acquiror in writing upon the termination of any Suspension, amend or supplement the
Prospectus, if necessary, so it does not contain any untrue statement or omission and furnish to the Share Acquiror such numbers of
copies  of  the  Prospectus  as  so  amended  or  supplemented  as  the  Share  Acquiror  may  reasonably  request.  The  Company  shall,  if
necessary,  supplement  or  amend  the  Shelf  Registration  Statement,  if  required  by  law  or  as  may  reasonably  be  requested  by  the
Share Acquiror.

2. Information. The Company may require the Share Acquiror to furnish to the Company such information regarding the
distribution of the Shares and such other information relating to the Share Acquiror and its ownership of Shares as the Company
may  from  time  to  time  reasonably  request  in  writing  to  the  extent  that  such  information  is  required  to  be  included  in  the  Shelf
Registration Statement.

3. Expenses. All expenses incident to the Company’s performance of or compliance with this Agreement shall be paid by
the Company, including (a) all registration and filing fees, and any other fees and expenses associated with filings required to be
made with the SEC or Financial Industry Regulatory

Authority, (b) all fees and expenses in connection with compliance with any securities or “Blue Sky” laws (including reasonable
fees and disbursements of counsel for the Underwriters in connection with blue sky qualifications of the Shares), (c) all printing,
duplicating,  word  processing,  messenger,  telephone  and  delivery  expenses  (including  expenses  of  printing  certificates  for  the
Shares  in  a  form  eligible  for  deposit  with  The  Depository  Trust  Company  and  of  printing  Prospectuses),  (d)  all  fees  and
disbursements  of  counsel  for  the  Company  and  of  all  independent  certified  public  accountants  or  independent  auditors  of  the
Company and any of its Subsidiaries (including the expenses of any special audit and comfort letters required by or incident to such
performance),  (e)  Securities  Act  liability  insurance  or  similar  insurance  if  the  Company  so  desires,  (f)  all  fees  and  expenses
incurred  in  connection  with  the  listing  of  the  Shares  on  any  securities  exchange  or  quotation  of  the  Shares  on  any  inter-dealer
quotation system, (g) all fees and expenses of any special experts or other Persons retained by the Company in connection with any
registration,  and  (h)  all  of  the  Company’s  internal  expenses  (including  all  salaries  and  expenses  of  its  officers  and  employees
performing  legal  or  accounting  duties).  For  the  avoidance  of  doubt,  the  Company  shall  not  be  required  to  pay  any  underwriting
discounts and commissions and transfer Taxes, if any, attributable to the sale of the Shares.

4. Notice. The Company shall notify the Share Acquiror immediately upon (a) any request by the SEC or any other Federal
or state Governmental Authority for amendments or supplements to a Shelf Registration Statement or for additional information
that  pertains  to  the  Share  Acquiror  as  a  selling  stockholder;  (b)  the  issuance  by  the  SEC  of  any  stop  order  suspending  the
effectiveness  of  the  Shelf  Registration  Statement  or  any  order  by  the  SEC  or  any  other  regulatory  authority  preventing  or
suspending  the  use  of  any  Prospectus  or  the  initiation  or  threatening  of  any  proceedings  for  such  purposes,  (c)  receipt  by  the
Company of any notification with respect to the suspension of the qualification of the Shares for offering or sale in any jurisdiction
or the initiation or threatening of any proceeding for such purpose, or (d) the Company becoming aware that the Shelf Registration
Statement or the related Prospectus contains any untrue statement of a material fact or omits to state a material fact necessary to
make  the  statements  therein  (in  the  case  of  such  Prospectus,  in  light  of  the  circumstances  under  which  they  were  made)  not
misleading.

5. Indemnification.

5.1 To the extent permitted by Law, the Company will indemnify and hold harmless the Share Acquiror, its officers
and directors, and each Person who controls the Share Acquiror (within the meaning of the Securities Act or the Exchange Act),
and  the  officers  and  directors,  of  each  such  controlling  Person,  from  and  against  any  and  all  losses,  claims,  liabilities,  damages,
deficiencies,  assessments,  fines,  judgments,  fees,  costs  (including,  without  limitation,  reasonable  costs  of  preparation  and
reasonable attorneys’ fees) and expenses (collectively “Losses”) (joint or several), as incurred, to which they may become subject
under the Securities Act, the Exchange Act or other federal or state law, insofar as such Losses (or actions in respect thereof) arise
out  of,  relate  to,  or  are  based  upon  any  of  the  following  statements,  omissions  or  violations  (collectively  a  “Violation”)  by  the
Company: (a) any untrue statement or alleged

untrue statement of a material fact contained in the Shelf Registration Statement or incorporated by reference therein, including any
Prospectus  contained  therein  or  any  amendments  or  supplements  thereto,  (b)  the  omission  or  alleged  omission  to  state  therein  a
material  fact  required  to  be  stated  therein,  or  necessary  to  make  the  statements  therein  not  misleading,  or  (c)  any  violation  or
alleged  violation  by  the  Company  of  the  Securities  Act,  the  Exchange  Act,  any  state  securities  Law,  or  any  rule  or  regulation
promulgated  under  the  Securities  Act,  the  Exchange  Act  or  any  state  securities  Law  in  connection  with  the  Shelf  Registration
Statement; and the Company will reimburse each such indemnified party for any legal or other expenses reasonably incurred by
them in connection with investigating or defending any such Loss or action if it is judicially determined that there was such a Share
Acquiror Violation; provided however, that the indemnity agreement contained in this Section 5.1 will not apply to amounts paid in
settlement of any such Loss or action if such settlement is effected without the Company’s consent, nor will the Company be liable
in any such case for any such Loss to the extent that it arises out of or is based upon a Violation which occurs in reliance upon and
in conformity with written information furnished by the Share Acquiror and stated to be expressly for use in connection with the
Shelf Registration Statement or an applicable Prospectus.

5.2 To the extent permitted by Law, the Share Acquiror will indemnify and hold harmless the Company and each of
its directors and its officers against any Losses (joint or several) to which the Company or any such director, officer, controlling
Person, Underwriter or other Third Party who may become subject under the Securities Act, the Exchange Act or other federal or
state law, insofar as such Losses (or actions in respect thereto) arise out of or are based upon any of the following statements: (a)
any untrue statement or alleged untrue statement of a material fact contained in any Registration Statement or any other document
incorporated reference therein, including any preliminary Prospectus or final Prospectus contained therein or any amendments or
supplements  thereto,  or  (b)  the  omission  or  alleged  omission  to  state  therein  a  material  fact  required  to  be  stated  therein,  or
necessary to make the statements therein not misleading (collectively, a “Share Acquiror Violation”), in each case to the extent
(and  only  to  the  extent)  that  such  Share  Acquiror  Violation  occurs  in  reliance  upon  and  in  conformity  with  written  information
furnished by the Share Acquiror under an instrument duly executed by the Share Acquiror; and the Share Acquiror will reimburse
any legal or other expenses reasonably incurred by the Company or any such director, officer, controlling Person, Underwriter or
other Third Party in connection with investigating or defending any such Loss or action if it is judicially determined that there was
such a Share Acquiror Violation; provided, however, that the indemnity agreement contained in this Section 5.2 will not apply to
amounts paid in settlement of any such Loss or action if such settlement is effected without the Share Acquiror’s consent; provided,
further that the obligations of the Share Acquiror hereunder shall be limited to an amount equal to the net proceeds it receives in
such Registration.

5.3 Promptly after receipt by an indemnified party under this Section 5 of notice of the commencement of any action
(including  any  governmental  action),  such  indemnified  party  will,  if  a  claim  in  respect  thereof  is  to  be  made  against  any
indemnifying party under this Section 5, deliver to the indemnifying party a written notice of the commencement thereof and the
indemnifying party will have the right to participate in, and, to the extent the indemnifying party so desires, jointly with any other

indemnifying  party  similarly  noticed,  to  assume  the  defense  thereof  with  counsel  mutually  satisfactory  to  the  parties;  provided,
however, that an indemnified party will have the right to retain its own counsel, with the fees and expenses thereof to be paid by the
indemnifying  party,  if  representation  of  such  indemnified  party  by  the  counsel  retained  by  the  indemnifying  party  would  be
inappropriate due to actual or potential differing interests between such indemnified party and any other party represented by such
counsel  in  such  proceeding.  The  failure  to  deliver  written  notice  to  the  indemnifying  party  within  a  reasonable  time  of  the
commencement of any such action will relieve such indemnifying party of any liability to the indemnified party under this Section
5 to the extent, and only to the extent, prejudicial to its ability to defend such action, but the omission so to deliver written notice to
the indemnifying party will not relieve it of any liability that it may have to any indemnified party otherwise than under this Section
5.

5.4 If the indemnification provided for in this Section 5 is held by a court of competent jurisdiction to be unavailable
to  an  indemnified  party  with  respect  to  any  Losses  referred  to  herein,  the  indemnifying  party,  in  lieu  of  indemnifying  such
indemnified  party  thereunder,  will  to  the  extent  permitted  by  applicable  Law  contribute  to  the  amount  paid  or  payable  by  such
indemnified party as a result of such Loss in such proportion as is appropriate to reflect the relative fault of the indemnifying party,
on the one hand, and of the indemnified party, on the other, in connection with the Violation(s) or Share Acquiror Violation(s), as
applicable, that resulted in such Loss, as well as any other relevant equitable considerations. The relative fault of the indemnifying
party and of the indemnified party will be determined by a court of law by reference to, among other things, whether the untrue or
alleged  untrue  statement  of  a  material  fact  or  the  omission  to  state  a  material  fact  relates  to  information  supplied  by  the
indemnifying party or by the indemnified party and the parties’ relative intent, knowledge, access to information and opportunity to
correct or prevent such statement or omission; provided, however,  that  the  obligations  of  the  Share  Acquiror  hereunder  shall  be
limited  to  an  amount  equal  to  the  net  proceeds  it  receives  in  such  Registration;  and  provided,  further,  that  no  Person  guilty  of
fraudulent misrepresentation within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any
Person who was not guilty of such fraudulent misrepresentation.

5.5  The  obligations  of  the  Company  and  the  Share  Acquiror  under  this  Section 5  will  survive  termination  of  this
Agreement and the expiration or withdrawal of the Shelf Registration Statement. No indemnifying party, in the defense of any such
claim  or  litigation,  will,  except  with  the  consent  of  each  indemnified  party,  consent  to  entry  of  any  judgment  or  enter  into  any
settlement which does not include as an unconditional term thereof the giving by the claimant or plaintiff to such indemnified party
of a release from all liability in respect to such claim or litigation.

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ANNEX A

PLAN OF DISTRIBUTION

The selling securityholders, including their pledgees, donees, transferees, distributees, beneficiaries or other successors in
interest,  may  from  time  to  time  offer  some  or  all  of  the  shares  of  common  stock  (collectively,  “Securities”)  covered  by  this
prospectus. To the extent required, this prospectus may be amended and supplemented from time to time to describe a specific plan
of distribution.

The selling securityholders will not pay any of the costs, expenses and fees in connection with the registration and sale of
the  Securities  covered  by  this  prospectus,  but  they  will  pay  any  and  all  underwriting  discounts,  selling  commissions  and  stock
transfer taxes, if any, attributable to sales of the Securities. We will not receive any proceeds from the sale of Securities.

The selling securityholders may sell the Securities covered by this prospectus from time to time, and may also decide not to
sell all or any of the Securities that they are allowed to sell under this prospectus. The selling securityholders will act independently
of us in making decisions regarding the timing, manner and size of each sale. These dispositions may be at fixed prices, at market
prices prevailing at the time of sale, at prices related to such prevailing market prices, at varying prices determined at the time of
sale, or at privately negotiated prices. Sales may be made by the selling securityholders in one or more types of transactions, which
may include:

•

•

•

•

•

•

•

•

•

•

•

•

purchases  by  underwriters,  dealers  and  agents  who  may  receive  compensation  in  the  form  of
underwriting  discounts,  concessions  or  commissions  from  the  selling  securityholders  and/or  the
purchasers of the Securities for whom they may act as agent;

one or more block transactions, including transactions in which the broker or dealer so engaged will
attempt to sell the Securities as agent but may position and resell a portion of the block as principal
to facilitate the transaction, or in crosses, in which the same broker acts as an agent on both sides of
the trade;

ordinary brokerage transactions or transactions in which a broker solicits purchases;

purchases by a broker-dealer or market maker, as principal, and resale by the broker-dealer for its
account;

the pledge of Securities for any loan or obligation, including pledges to brokers or dealers who may
from time to time effect distributions of Securities, and, in the case of any collateral call or default
on such loan or obligation, pledges or sales of Securities by such pledgees or secured parties;

short sales or transactions to cover short sales relating to the Securities;

one or more exchanges or over the counter market transactions;

through distribution by a selling securityholder or its successor in interest to its members, general or
limited  partners  or  shareholders  (or  their  respective  members,  general  or  limited  partners  or
shareholders);

privately negotiated transactions;

the writing of options, whether the options are listed on an options exchange or otherwise;

distributions to creditors and equity holders of the selling securityholders; and

any combination of the foregoing, or any other available means allowable under applicable law.

A selling securityholder may also resell all or a portion of its Securities in open market transactions in reliance upon Rule
144  under  the  Securities  Act  of  1933,  as  amended  (the  “Securities  Act”)  provided  it  meets  the  criteria  and  conforms  to  the
requirements of Rule 144 under the Securities Act and all applicable laws and regulations.

The  selling  securityholders  may  enter  into  sale,  forward  sale  and  derivative  transactions  with  third  parties,  or  may  sell
securities not covered by this prospectus to third parties in privately negotiated transactions. In connection with those sale, forward
sale or derivative transactions, the third parties may sell securities covered by this prospectus, including in short sale transactions
and by issuing securities that are not covered by this prospectus but are exchangeable for or represent beneficial interests in the
common

 
 
 
 
 
 
     
     
 
 
       
       
 
 
         
         
 
 
       
       
 
 
       
       
 
 
     
     
 
 
   
   
 
 
 
         
 
         
 
 
         
         
 
 
 
 
       
       
stock. The third parties also may use shares of common stock received under those sale, forward sale or derivative arrangements or
shares of common stock pledged by the selling securityholder or borrowed from the selling securityholders or others to settle such
third-party  sales  or  to  close  out  any  related  open  borrowings  of  common  stock.  The  third  parties  may  deliver  this  prospectus  in
connection with any such transactions. Any third party in such sale transactions will be an underwriter and will be identified in a
supplement or a post-effective amendment to the registration statement of which this prospectus is a part, as may be required.

In  addition,  the  selling  securityholders  may  engage  in  hedging  transactions  with  broker-dealers  in  connection  with
distributions of Securities or otherwise. In those transactions, broker-dealers may engage in short sales of securities in the course of
hedging  the  positions  they  assume  with  selling  securityholders.  The  selling  securityholders  may  also  sell  securities  short  and
redeliver securities to close out such short positions. The selling securityholders may also enter into option or other transactions
with  broker-dealers  which  require  the  delivery  of  securities  to  the  broker-dealer.  The  broker-dealer  may  then  resell  or  otherwise
transfer such securities pursuant to this prospectus. The selling securityholders also may loan or pledge Securities, and the borrower
or pledgee may sell or otherwise transfer the Securities so loaned or pledged pursuant to this prospectus. Such borrower or pledgee
also may transfer those Securities to investors in our securities or the selling securityholders’ securities or in connection with the
offering of other securities not covered by this prospectus.

To  the  extent  necessary,  the  specific  terms  of  the  offering  of  Securities,  including  the  specific  Securities  to  be  sold,  the
names  of  the  selling  securityholders,  the  respective  purchase  prices  and  public  offering  prices,  the  names  of  any  underwriter,
broker-dealer  or  agent,  if  any,  and  any  applicable  compensation  in  the  form  of  discounts,  concessions  or  commissions  paid  to
underwriters  or  agents  or  paid  or  allowed  to  dealers  will  be  set  forth  in  a  supplement  to  this  prospectus  or  a  post-effective
amendment to this registration statement of which this prospectus forms a part. The selling securityholders may, or may authorize
underwriters, dealers and agents to, solicit offers from specified institutions to purchase Securities from the selling securityholders.
These sales may be made under “delayed delivery contracts” or other purchase contracts that provide for payment and delivery on a
specified future date. If necessary, any such contracts will be described and be subject to the conditions set forth in a supplement to
this prospectus or a post-effective amendment to this registration statement of which this prospectus forms a part.

Broker-dealers or agents may receive compensation in the form of commissions, discounts or concessions from the selling
securityholders. Broker-dealers or agents may also receive compensation from the purchasers of Securities for whom they act as
agents  or  to  whom  they  sell  as  principals,  or  both.  Compensation  to  a  particular  broker-dealer  might  be  in  excess  of  customary
commissions and will be in amounts to be negotiated in connection with transactions involving securities. In effecting sales, broker-
dealers engaged by the selling securityholders may arrange for other broker-dealers to participate in the resales.

In  connection  with  sales  of  Securities  covered  hereby,  the  selling  securityholders  and  any  underwriter,  broker-dealer  or
agent  and  any  other  participating  broker-dealer  that  executes  sales  for  the  selling  securityholders  may  be  deemed  to  be  an
“underwriter” within the meaning of the Securities Act.

Accordingly, any profits realized by the selling securityholders and any compensation earned by such underwriter, broker-dealer or
agent  may  be  deemed  to  be  underwriting  discounts  and  commissions.  Selling  securityholders  who  are  “underwriters”  under  the
Securities Act must deliver this prospectus in the manner required by the Securities Act. This prospectus delivery requirement may
be satisfied in accordance with Rule 153 under the Securities Act or satisfied in accordance with Rule 174 under the Securities Act.

We and the selling securityholders have agreed to indemnify each other against certain liabilities, including liabilities under
the  Securities  Act.  In  addition,  we  or  the  selling  securityholders  may  agree  to  indemnify  any  underwriters,  broker-dealers  and
agents against or contribute to any payments the underwriters, broker-dealers or agents may be required to make with respect to,
civil  liabilities,  including  liabilities  under  the  Securities  Act.  Underwriters,  broker-dealers  and  agents  and  their  affiliates  are
permitted to be customers of, engage in transactions with, or perform services for us and our affiliates or the selling securityholders
or their affiliates in the ordinary course of business.

The selling securityholders will be subject to the applicable provisions of Regulation M of the Securities Exchange Act of
1934 and the rules and regulations thereunder, which provisions may limit the timing of purchases and sales of any of the Securities
by the selling securityholders. Regulation M may also restrict the ability of any person engaged in the distribution of the Securities
to  engage  in  market-making  activities  with  respect  to  the  Securities.  These  restrictions  may  affect  the  marketability  of  such
Securities.

In  order  to  comply  with  applicable  securities  laws  of  some  states  or  countries,  the  Securities  may  only  be  sold  in  those
jurisdictions through registered or licensed brokers or dealers and in compliance with applicable laws and regulations. In addition,
in certain states or countries the Securities may not be sold unless they have been registered or qualified for sale in the applicable
state  or  country  or  an  exemption  from  the  registration  or  qualification  requirements  is  available.  In  addition,  any  Securities  of  a
selling securityholder covered by this prospectus that qualify for sale pursuant to Rule 144 under the Securities Act may be sold in
open market transactions under Rule 144 rather than pursuant to this prospectus.

In connection with an offering of Securities under this prospectus, the underwriters may purchase and sell securities in the
open market. These transactions may include short sales, stabilizing transactions and purchases to cover positions created by short
sales. Short sales involve the sale by the underwriters of a greater number of securities than they are required to purchase in an
offering. Stabilizing transactions consist of certain bids or purchases made for the purpose of preventing or retarding a decline in
the market price of the securities while an offering is in progress.

The  underwriters  also  may  impose  a  penalty  bid.  This  occurs  when  a  particular  underwriter  repays  to  the  underwriters  a
portion of the underwriting discount received by it because the underwriters have repurchased securities sold by or for the account
of that underwriter in stabilizing or short-covering transactions.

These activities by the underwriters may stabilize, maintain or otherwise affect the market price of the Securities offered

under this prospectus. As a result, the price of the Securities may be higher than the

price  that  otherwise  might  exist  in  the  open  market.  If  these  activities  are  commenced,  they  may  be  discontinued  by  the
underwriters at any time. These transactions may be effected on the Nasdaq Global Select Market or another securities exchange or
automated quotation system, or in the over-the-counter market or otherwise.

[Remainder of page intentionally left blank]

 
EXHIBIT A

SUBSIDIARIES OF DICERNA PHARMACEUTICALS, INC.

NAME

JURISDICTION OF INCORPORATION

DICERNA SECURITY CORPORATION

DELAWARE

DICERNA CAYMAN (TO BE DISSOLVED ON OR BEFORE DECEMBER 31,
2019)

DICERNA EU LIMITED

DICERNA IRELAND LIMITED

CAYMAN

ENGLAND

IRELAND

 
 
 
 
 
FIRST AMENDMENT TO LEASE AGREEMENT

Exhibit 10.52

THIS FIRST AMENDMENT TO LEASE AGREEMENT (this “First Amendment”)  is  entered  into  effective  as  of  February  4,  2020
(the “First Amendment Date”), by and between WESTERN OFFICE PORTFOLIO PROPERTY OWNER LLC, a Delaware limited liability
company (“Landlord”), and DICERNA PHARMACEUTICALS, INC., a Delaware corporation (“Tenant”).     

RECITALS:

A.

Landlord,  as  landlord,  and  Tenant,  as  tenant,  entered  into  that  certain  Lease  Agreement  dated  August  26,  2019  (the
“Existing Lease”), relating to the leasing of certain premises (the “Current Premises”), consisting of approximately 15,781 rentable square
feet,  commonly  known  as  Suite  100  in  the  building  located  at  4949  Pearl  East  Circle,  Boulder,  Colorado  80301  (the  “Building”),  said
Premises being more particularly described in the Existing Lease.

B.

Landlord  and  Tenant  desire  (i)  to  provide  for  the  leasing  of  the  First  Expansion  Premises  (as  defined  below),  (ii)  to
establish the term of the Lease as to the First Expansion Premises, (iii) to establish the Basic Rent for the First Expansion Premises Term
(as defined below), and (iv) to amend other terms of the Existing Lease, all subject and pursuant to the terms and conditions set forth below.

NOW, THEREFORE, for good and valuable consideration the receipt and adequacy of which are hereby acknowledged, Landlord

and Tenant agree as follows:

AGREEMENT:

1.

2.

Incorporation of Recitals. The foregoing Recitals shall be incorporated as though fully set forth herein.

First Expansion Premises.

2.1        Lease  of  the  First  Expansion  Premises.  On  the  First  Expansion  Premises  Commencement  Date  (as  defined  below),
Landlord  hereby  leases  to  Tenant,  and  Tenant  hereby  leases  from  Landlord,  those  certain  premises,  commonly  known  as  Suite  300,
consisting  of  approximately  6,985  rentable  square  feet  of  space  on  the  3rd  floor  of  the  Building  and  being  more  particularly  depicted  on
Exhibit “A” attached hereto and incorporated herein (the “First Expansion Premises”).

2.2        Condition  of  the  First  Expansion  Premises.  Tenant  acknowledges  that  neither  Landlord  nor  any  agent  of  Landlord  has
made any representation or warranty with respect to the First Expansion Premises or the Building or with respect to the suitability of any
part  of  the  same  for  the  conduct  of  Tenant’s  business.  The  taking  of  possession  of  the  First  Expansion  Premises  by  Tenant  shall
conclusively  establish  that  the  First  Expansion  Premises  and  the  Building  were  at  such  time  in  a  good  and  sanitary  order,  condition  and
repair  acceptable  to  Tenant.  Except  as  expressly  set  forth  in  Exhibit  B  attached  hereto,  Tenant  shall  be  conclusively  deemed  to  have
accepted  the  First  Expansion  Premises  “AS  IS”  in  the  condition  existing  on  the  First  Expansion  Premises  Commencement  Date,  and  to
have waived all claims relating to the condition of the First Expansion Premises. Except as expressly set forth on Exhibit B attached hereto,
Landlord  shall  not  have  any  obligation  to  construct  or  install  any  improvements  or  alterations,  or  to  pay  for  any  such  construction  or
installation, in or on the First Expansion Premises.

3.
Combined  Premises;  The  Premises.  As  used  herein,  the  “Combined  Premises”  shall  mean,  collectively,  (a)  the  Current
Premises plus (b) the First Expansion Premises. Landlord and Tenant acknowledge and agree that (i) the Combined Premises shall consist
of approximately 22,766 rentable square feet, subject to verification and adjustment with respect to the First Expansion Premises only, in
accordance with the terms and conditions of Section 26.3 of the Existing Lease and (ii) the Combined Premises shall be identified as Suites
100  and  300  in  the  Building.  From  and  after  the  First  Expansion  Premises  Commencement  Date,  the  Lease  is  amended  such  that  all
references in the Lease to the “Premises” shall be deemed to refer to the Combined Premises, except that in no event shall the fact that
Tenant  is  conducting  business  in  the  First  Expansion  Premises  trigger  the  Commencement  Date  with  respect  to  the  Existing  Premises
(which Commencement Date shall be governed by the Existing Lease).

4.

Term.

4.1    First Expansion Premises Term. The term of the Lease for the First Expansion Premises (the "First Expansion Premises
Term") shall commence on the First Expansion Premises Commencement Date and terminate on the Expiration Date (which is at 5:00 p.m.
local time on the last day of the 87th full calendar month following the Commencement Date (as defined in the Existing Lease)), such that the
Term as to the Current Premises and the First Expansion Premises Term are coterminous. From and after the First Expansion Premises
Commencement Date, the Lease is amended such that all references in the Lease to the “Term” of the Lease shall be deemed to include
reference to the First Expansion Premises Term.

4.2    First Expansion Premises Commencement Date. The date on which Landlord tenders possession of the First Expansion
Premises  to  Tenant  shall  be  the  “First  Expansion  Premises  Commencement  Date”.  Landlord  and  Tenant  presently  anticipate  that
possession  of  the  First  Expansion  Premises  will  be  tendered  to  Tenant  within  three  business  days  following  Tenant’s  full  execution  and
delivery of this First Amendment to Landlord. Except to the extent expressly included as part of the First Expansion Premises Work, as set
forth on Exhibit B attached hereto, any Tenant improvements, alterations, repairs or maintenance to the First Expansion Premises shall be
performed in accordance with Section 8 of the Existing Lease and at Tenant’s sole cost and expense.

4.3    Commencement Date Memorandum. Promptly following the First Expansion Premises Commencement Date, Landlord and
Tenant  shall  execute  a  commencement  date  memorandum,  in  the  form  of  Exhibit  C  attached  hereto  (the  “Commencement  Date
Memorandum”),  acknowledging  that  Tenant  has  accepted  possession  of  the  First  Expansion  Premises,  and  reciting  the  exact  First
Expansion Premises Commencement Date. The failure by either party, or both parties, to execute the Commencement Date Memorandum
shall  not  affect  the  rights  or  obligations  of  either  party  hereunder.  The  Commencement  Date  Memorandum,  when  so  executed  and
delivered, shall be deemed to be a part of the Lease.

5.

Rent and Other Terms.

5.1

Monthly Base Rent.

conditions of the Lease.

(a)    For the Current Premises. Tenant shall continue to pay Rent as to the Current Premises pursuant to the terms and

(b)    For the First Expansion Premises. Beginning on the First Expansion Premises Commencement Date, and continuing
throughout  the  First  Expansion  Premises  Term,  Tenant  shall  pay  Basic  Rent  for  the  First  Expansion  Premises,  accruing  on  and  after  the
First Expansion Premises Commencement Date and monthly thereafter, as Basic Rent for the First Expansion Premises Term, as follows:

Months of the First Expansion
Premises Term

First Expansion Premises
Commencement Date – 12

13 – 24

25 – 36

37 – 48

49 – 60

61 – 72

73 – 84

Annual Basic Rent
Rate Per Rentable
Square Foot in the
First Expansion
Premises

Monthly Basic
Rent

$26.00

$26.78

$27.58

$28.41

$29.26

$30.14

$31.05

$15,134.17

$15,588.19

$16,053.86

$16,536.99

$17,031.76

$17,543.99

$18,073.69

85 – Expiration Date

$31.98

$18,615.03

5.2

Tenant’s Share of Operating Expenses.

the Current Premises pursuant to the terms and conditions of the Existing Lease.

(a)    For the Current Premises. Tenant shall continue to pay Tenant’s Proportionate Share of Operating Costs and Taxes for

(b)    For the First Expansion Premises. Beginning on the First Expansion Premises Commencement Date, and continuing
throughout the First Expansion Premises Term, Tenant shall pay, in addition to Tenant’s Proportionate Share of Operating Costs and Taxes
for  the  Current  Premises,  Tenant’s  Proportionate  Share  of  Operating  Costs  and  Taxes  for  the  First  Expansion  Premises.  “  Tenant’s
Proportionate Share”  allocable  to  the  First  Expansion  Premises  shall  mean  that  fraction,  the  numerator  of  which  is  the  total  number  of
rentable square feet of the First Expansion Premises (i.e. 6,985 square feet) and the denominator of which is the number of rentable square
feet in the Building (i.e., 29,201 square feet), and is equal to 23.92%, subject to adjustment in accordance with the terms and conditions of
the Lease.

5.3     Tenant’s Covenant to Pay Rent. Tenant agrees to pay to Landlord at Landlord’s Address, or to such other persons, or at
such other places designated by Landlord, without any prior demand therefor as set forth in the Lease and without any deduction or offset
whatsoever, Basic Rent, Additional Rent and all other amounts due under the Lease during the First Expansion Premises Term (collectively,
“Rent”). Basic Rent shall be paid monthly in advance on the first day of each month of the First Expansion Premises Term. Basic Rent shall
be prorated for partial months within the First Expansion Premises Term. Unpaid Rent shall accrue interest at the Default Rate from the date
due until paid. Tenant’s covenant to pay Rent shall be independent of every other covenant in the Lease.

6.
five years each, as set forth in Exhibit H to the Existing Lease, shall apply, mutatis mutandis, as to the First Expansion Premises.

 Continuation of Tenant’s Options. Tenant’s options to extend the Term as to the Current Premises for two additional terms of

7.
Tender of Possession of the Current Premises. Landlord and Tenant acknowledge and agree that Tenant’s full execution and
delivery of the Lease to Landlord occurred on October 2, 2019 when Tenant delivered to Landlord Tenant’s Letter of Credit. Therefore, (a)
the  Estimated  Delivery  Date  shall  mean  April  2,  2020,  (ii)  the  Liquidated  Damages  Date  shall  mean  July  2,  2020,  and  (iii)  the  Delayed
Delivery Termination Date shall mean April 2, 2021.

8.

Letter of Credit.

8.1    Modification to Existing Lease. Section 26.5.6 of the Existing Lease is amended by deleting the table therein, and replacing

it with the following:

Lease Month

1 – 36

37 – The date that is 60
days after the end of the Term
or any renewal Term

Required Tenant’s Letter of Credit Amount

$500,000.00

$350,000.00

8.2    Tenant’s First Expansion Premises Letter of Credit. Concurrently with the execution and delivery of this First Amendment,
Tenant shall deliver to Landlord, as collateral for the full performance by Tenant of all of its obligations under the Lease and for all losses
and damages Landlord may suffer as a result of any default by Tenant under the Lease, a standby, unconditional, irrevocable, transferable
letter of credit (“Tenant’s First Expansion Premises Letter of Credit”) in the form of Exhibit J  to  the  Existing  Lease  and  containing  the
terms required herein, in the face amount set forth in Section
26.5.6 of the existing Lease (as modified by Section 8.1 of this First Amendment) (“Tenant’s First Expansion Premises Letter of Credit
Amount”), naming Landlord as beneficiary, permitting multiple and partial draws

thereon, in compliance with all of the requirements as are applicable to Tenant’s Letter of Credit (including satisfaction of Tenant’s LC Issuer
Requirements)  and  otherwise  in  form  acceptable  to  Landlord  in  its  sole  discretion;  provided  however,  that  no  delay  in  the  delivery  of  the
Tenant’s First Expansion Premises Letter of Credit shall delay the First Expansion Premises Commencement Date.

From and after the date that Tenant delivers Tenant’s First Expansion Premises Letter of Credit to Landlord, the Lease is amended such
that all references in the Lease to the “Tenant’s Letter of Credit” shall be deemed to refer to the Tenant’s Letter of Credit and the Tenant’s
First Expansion Premises Letter of Credit.

9.
that the number of spaces being made available to Tenant in the Parking Area is increased from 47 to 68.

Parking. From and after the First Expansion Premises Commencement Date, Exhibit G of the Existing Lease is amended such

10.
Brokerage. Neither Landlord nor Tenant has dealt with any broker or agent in connection with the negotiation or execution of
this First Amendment, other than Lodge Commercial Partners, Inc. as Tenant’s broker and WWR Real Estate Services, LLC as Landlord’s
broker, whose commissions shall be paid by Landlord pursuant to separate written agreements. Tenant and Landlord shall each indemnify
the other against all costs, expenses, attorneys’ fees, liens and other liability for commissions or other compensation claimed by any other
broker or agent claiming the same by, through or under the indemnifying party.

11.
Amendment.

Confidentiality. Section 25.22  of  the  Existing  Lease  is  hereby  incorporated  herein  as  if  fully  set  forth  in  the  body  of  this  First

12.

General Provisions.

12.1    Ratification. Tenant acknowledges that neither Landlord nor any agent of Landlord has made any representation or warranty
with respect to the Combined Premises, the Building or the Complex, or with respect to the suitability of any part of the same for the conduct
of Tenant’s business. Tenant hereby ratifies and confirms its obligations under the Lease, and represents and warrants to Landlord that it
has no defenses thereto. Tenant further confirms and ratifies that, as of the First Amendment Date, (i) the Existing Lease is and remains in
good standing and in full force and effect and has not been modified except as provided by this First Amendment; (ii) Tenant has no claims,
counterclaims,  set-offs  or  defenses  against  Landlord  arising  out  of  the  Lease  or  in  any  way  relating  thereto  or  arising  out  of  any  other
transaction between Landlord and Tenant; and (iii) as of the First Amendment Date, there are no uncured defaults or unfulfilled obligations
on the part of Landlord or Tenant.

12.2    Scope  of  Amendment;  Defined  Terms.  Except  as  expressly  provided  in  this  First  Amendment,  the  Existing  Lease  shall
remain  in  full  force  and  effect.  Should  any  inconsistency  arise  between  this  First  Amendment  and  the  Existing  Lease  as  to  the  specific
matters which are the subject of this First Amendment, the terms and conditions of this First Amendment shall control. All capitalized terms
used  in  this  First  Amendment  and  not  defined  herein  shall  have  the  meanings  set  forth  in  the  Existing  Lease  unless  the  context  clearly
requires otherwise; provided, however, that the term “Lease” as used herein and, from and after the First Amendment Date, in the Existing
Lease shall refer to the Existing Lease as modified by this First Amendment.

12.3    Successors and Assigns. This First Amendment shall be binding upon and inure to the benefit of the parties hereto and

their heirs, personal representatives, successors and assigns.

12.4    Entire Agreement. The Existing Lease, as amended by this First Amendment, contains the entire agreement of Landlord
and Tenant with respect to the subject matter hereof, and may not be amended or modified except by an instrument executed in writing by
Landlord and Tenant.

12.5    Power and Authority. Tenant has not assigned or transferred any interest in the Lease and has full power and authority to

execute this First Amendment.

12.6    Counterparts. This First Amendment may be executed in any number of counterparts, each of which shall be deemed to be
an  original,  and  all  of  such  counterparts  shall  constitute  one  document.  To  facilitate  execution  of  this  First  Amendment,  the  parties  may
execute  and  exchange,  by  telephone  facsimile  or  electronic  mail  PDF,  counterparts  of  the  signature  pages.  Signature  pages  may  be
detached from the counterparts and attached to a single copy of this First Amendment to physically form one document.

12.7    Attorneys’ fees. In the event of litigation arising out of or in connection with this First Amendment, the prevailing party shall

be awarded reasonable attorneys’ fees, costs and expenses.

12.8        Governing Law.  This  First  Amendment  shall  be  governed  by  and  construed  in  accordance  with  the  laws  of  the  State  of

Colorado.

12.9    No Option. The submission of this document for examination and review does not constitute an option or an offer to lease
space in the Building or an agreement to lease. This document shall have no binding effect on the parties unless and until executed by both
Landlord and Tenant and will be effective only upon Landlord’s execution of the same.

12.10    List of Exhibits. All exhibits and attachments attached hereto are incorporated herein by this reference.

Exhibit A    -    Outline of First Expansion Premises
Exhibit B
Exhibit C    -    Form of Confirmation of Commencement Date Letter Exhibit D    -    Right of First Offer

-    Tenant Finish First Expansion Premises Work: Allowance (Landlord Performs the First Expansion Premises Work)

[signature page follows]

IN WITNESS WHEREOF, Landlord and Tenant have caused this First Amendment to be executed as of the First Amendment Date.

LANDLORD:

WESTERN OFFICE PORTFOLIO PROPERTY OWNER LLC,
a Delaware limited liability company

By:    /s/ Andrew Dremyuga

Name: Andrew Dremyuga

Title:    Authorized Signatory

TENANT:

DICERNA PHARMACEUTICALS, INC. ,
a Delaware corporation    ·

By:    /s/ John B. Green/

Name: John B. Green

Title:    Chief Financial Officer

FIRST AMENDMENT TO OFFICE LEASE

4949 PEARL EAST CIRCLE, SUITES 100 AND 300
BOULDER, COLORADO 80301

SIGNATURE PAGE

EXHIBIT A
OUTLINE OF FIRST EXPANSION PREMISES

EXHIBIT B

TENANT FINISH-WORK: ALLOWANCE
(Landlord Performs the First Expansion Premises Work)

1.

Acceptance of First Expansion Premises. Tenant accepts the First Expansion Premises in their “AS-IS” condition on
the date that this First Amendment is entered into. Tenant intends to immediately accept Landlord’s delivery of the First Expansion Premises
and conduct business therein, and intends to vacate the First Expansion Premises on or around the date on which Landlord delivers the
Current Premises to Tenant with the Work in the Current Premises Substantially Completed, pursuant to the terms of the Existing Lease.
Landlord  and  Tenant  acknowledge  and  agree  that  on  or  prior  to  the  First  Expansion  Premises  Vacation  Date  (as  defined  below),  Tenant
shall  vacate  the  First  Expansion  Premises  and  remove  all  personnel  and  all  furniture,  fixtures  and  equipment  installed  by  Tenant,  all  at
Tenant’s sole cost and expense, unless otherwise agreed to by Landlord in writing. Within 15 business days after the Work in the Current
Premises is Substantially Completed, Landlord and Tenant will agree on a date by which Tenant shall vacate the First Expansion Premises
(the  “First  Expansion  Premises  Vacation  Date”);  provided  however,  that  if  Landlord  and  Tenant  fail  agree  on  the  First  Expansion
Premises Vacation Date within such 15 business day period, then the First Expansion Premises Vacation Date shall be the date that is 10
business  days  after  the  date  on  which  the  working  drawings  are  fully  approved  (or  deemed  approved)  by  both  Landlord  and  Tenant,  as
contemplated  in  Section  3.2  of  this  Exhibit.  Tenant  acknowledges  and  agrees  that  Landlord  is  not  obligated  to  commence  any  First
Expansion Premises Work, as contemplated by this Exhibit, unless and until Tenant vacates the First Expansion Premises pursuant to the
terms of this Section 1.

2.

Space Plans.

2.1    Preparation and Delivery. On or before the tenth day following date on which Landlord delivers the Current Premises
to  Tenant  with  the  Work  in  the  Current  Premises  Substantially  Completed,  pursuant  to  the  terms  of  the  Existing  Lease  (the  “First
Amendment Space Plans Delivery Deadline”), Tenant shall deliver to Landlord a space plan prepared by a design consultant reasonably
acceptable  to  Landlord  (the  “Architect”)  depicting  improvements  to  be  installed  in  the  First  Expansion  Premises  (the  “First  Expansion
Premises Space Plans”).

2.2        Approval  Process.  Landlord  shall  notify  Tenant  whether  it  approves  of  the  submitted  First  Expansion  Premises
Space Plans within five business days after Tenant’s submission thereof. If Landlord disapproves of such First Expansion Premises Space
Plans, then Landlord shall notify Tenant thereof specifying in reasonable detail the reasons for such disapproval, in which case Tenant shall,
within  five  business  days  after  such  notice,  revise  such  First  Expansion  Premises  Space  Plans  in  accordance  with  Landlord’s  objections
and  submit  to  Landlord  for  its  review  and  approval.  Landlord  shall  notify  Tenant  in  writing  whether  it  approves  of  the  resubmitted  First
Expansion  Premises  Space  Plans  within  three  business  days  after  its  receipt  thereof.  This  process  shall  be  repeated  until  the  First
Expansion Premises Space Plans have been finally approved by Landlord and Tenant. If Landlord fails to notify Tenant that it disapproves of
the initial First Expansion Premises Space Plans within five business days (or, in the case of resubmitted First Expansion Premises Space
Plans,  within  three  business  days)  after  the  submission  thereof,  then  Landlord  shall  be  deemed  to  have  approved  the  First  Expansion
Premises Space Plans in question. If Tenant fails to timely deliver such First Expansion Premises Space Plans, then each day after the First
Amendment  Space  Plans  Delivery  Deadline  that  such  First  Expansion  Premises  Space  Plans  are  not  delivered  to  Landlord  shall  be  a
Tenant Delay Day (defined below).

3.

First Expansion Premises Working Drawings.

3.1    Preparation and Delivery. On or before the date which is 15 days following the final approval of the First Expansion
Premises Space Plans, as outlined in Section 2 above, Landlord shall cause to be prepared final working drawings of all improvements to
be  installed  in  the  First  Expansion  Premises  and  deliver  the  same  to  Tenant  for  its  review  and  approval  (which  approval  shall  not  be
unreasonably withheld, delayed or conditioned). Such working drawings shall be prepared by Architect

or another design consultant selected by Landlord. Unless otherwise expressly included in the approved First Expansion Premises Space
Plans to the contrary, the First Expansion Premises Work shall be performed utilizing Building-standard materials and other materials that
are readily available.

3.2        Approval Process.  Tenant  shall  notify  Landlord  in  writing  whether  it  approves  of  the  submitted  working  drawings
within  five  business  days  after  Landlord’s  submission  thereof.  If  Tenant  disapproves  of  such  working  drawings,  then  Tenant  shall  notify
Landlord thereof specifying in reasonable detail the reasons for such disapproval, in which case Landlord shall, within five business days
after such notice, revise such working drawings in accordance with Tenant’s objections and submit the revised working drawings to Tenant
for  its  review  and  approval.  Tenant  shall  notify  Landlord  in  writing  whether  it  approves  of  the  resubmitted  working  drawings  within  three
business days after its receipt thereof. This process shall be repeated until the working drawings have been finally approved by Landlord
and Tenant. If Tenant fails to notify Landlord that it disapproves of the initial working drawings within five business days (or, in the case of
resubmitted working drawings, within three business days) after the submission thereof, then Tenant shall be deemed to have approved the
working drawings in question. Any delay caused by Tenant’s unreasonable withholding of its consent or delay in giving its written approval
as to such working drawings shall constitute a Tenant Delay Day. If the working drawings are not fully approved (or deemed approved) by
both Landlord and Tenant by the 15th business day after the delivery of the initial draft thereof to Tenant, then each day after such time
period  that  such  working  drawings  are  not  fully  approved  (or  deemed  approved)  by  both  Landlord  and  Tenant  shall  constitute  a  Tenant
Delay Day.

3.3     Landlord’s Approval; Performance of First Expansion Premises Work. If any of Tenant’s proposed construction
work will affect the Building’s Structure or the Building’s Systems, then the working drawings pertaining thereto must be approved by the
Project’s  engineer  of  record.  Landlord’s  approval  of  such  working  drawings  shall  not  be  unreasonably  withheld,  provided  that  (a)  they
comply  with  all  Laws,  (b)  the  improvements  depicted  thereon  do  not  (1)  adversely  affect  (in  the  reasonable  discretion  of  Landlord)  the
Building’s Structure or the Building’s Systems (including the Project’s restrooms or mechanical rooms), or (2) affect (in the sole discretion of
Landlord) (A) the exterior appearance of the Project, (B) the appearance of the Project’s common areas or elevator lobby areas, or
(C) the provision of services to other occupants of the Project, (c) such working drawings are sufficiently detailed to allow construction of the
improvements and associated work in a good and workmanlike manner for the entire First Expansion Premises, and (d) the improvements
depicted  thereon  conform  to  the  rules  and  regulations  promulgated  from  time  to  time  by  Landlord  for  the  construction  of  tenant
improvements (a copy of which has been delivered to Tenant). As used herein, “First Expansion Premises Working Drawings” means the
final  working  drawings  approved  by  Landlord,  as  amended  from  time  to  time  by  any  approved  changes  thereto,  and  “First  Expansion
Premises  Work”  means  all  improvements  to  be  constructed  by  Landlord  in  accordance  with  and  as  indicated  on  the  First  Expansion
Premises  Working  Drawings,  together  with  any  work  required  by  governmental  authorities  to  be  made  to  other  areas  of  the  Project  as  a
result of the improvements indicated by the First Expansion Premises Working Drawings. The First Expansion Premises Work shall include
the installation of an appropriate conduit for the containment of fiber optic cables, such that Tenant can install fiber optic cables (i) between
the Current Premises and Suite 100 MDF/Server Room, and (ii) between the First Expansion Premises and the Suite 300 IDF closet, and
Landlord hereby grants Tenant reasonable access to such areas of the Project as required in order to complete such installation, provided
that  any  such  installations  shall  constitute  Tenant’s  Off-Premises  Equipment,  as  applicable.  Landlord’s  approval  of  the  First  Expansion
Premises Working Drawings shall not be a representation or warranty of Landlord that such drawings are adequate for any use or comply
with any Law, but shall merely be the consent of Landlord thereto. Tenant shall, at Landlord’s request, sign the First Expansion Premises
Working Drawings to evidence its review and approval thereof. After the First Expansion Premises Working Drawings have been approved,
Landlord  shall  cause  the  First  Expansion  Premises  Work  to  be  performed  in  substantial  accordance  with  the  First  Expansion  Premises
Working Drawings, using contractors and subcontractors selected by Landlord.

4.

Bidding of First Expansion Premises Work. Tenant has the right to elect to use the same general contractor as was

selected for the Work in the Current Premises by providing written notice

of such election to Landlord. If Tenant does not elect to use such contractor, then, prior to commencing the First Expansion Premises Work,
Landlord shall competitively bid the First Expansion Premises Work to two contractors selected by Landlord and one contractor selected by
the Tenant, and reasonably approved by Landlord. If the estimated First Expansion Premises Construction Costs are expected to exceed
the First Expansion Premises Construction Allowance, Tenant shall be allowed to review the submitted bids from such contractors to value
engineer  any  of  Tenant’s  requested  alterations.  In  such  case,  Tenant  shall  notify  Landlord  of  any  items  in  the  First  Expansion  Premises
Working Drawings that Tenant desires to change within five business days after Landlord’s submission thereof to Tenant. If Tenant fails to
notify  Landlord  of  its  election  within  such  five  business  day  period,  Tenant  shall  be  deemed  to  have  approved  the  bids.  Within  seven
business days following Landlord’s submission of the initial construction bids to Tenant under the foregoing provisions (if applicable), Tenant
shall have completed all of the following items: (a) finalized with Landlord’s representative and the proposed contractor, the pricing of any
requested  revisions  to  the  bids  for  the  First  Expansion  Premises  Work,  and  (b)  approved  in  writing  any  overage  in  the  First  Expansion
Premises Construction Costs in excess of the First Expansion Premises Construction Allowance, failing which each day after such seven
business  day  period  shall  constitute  a  Tenant  Delay  Day.  Tenant  and  Landlord  acknowledge  and  agree  that  Tenant  shall  select  the
contractor for the First Expansion Premises Work based on the bids, provided however that Tenant’s decision shall be subject to Landlord’s
reasonable approval of such contractor’s bid.

5.

Change Orders. Tenant may initiate changes in the First Expansion Premises Work. Each such change must receive the
prior  written  approval  of  Landlord,  such  approval  shall  be  granted  or  withheld  in  accordance  with  the  standards  set  forth  in  Section  3.3
above; additionally, if any such requested change

might  (a)  delay  the  First  Expansion  Premises  Commencement  Date  or  (b)  leave  any  portion  of  the  First  Expansion  Premises  not  fully
finished and ready for occupancy, Landlord may withhold its consent in its sole and absolute discretion. Landlord shall, upon completion of
the First Expansion Premises Work, cause to be prepared accurate architectural, mechanical, electrical and plumbing “as-built” plans of the
First Expansion Premises Work as constructed in both blueprint and electronic CADD format, which plan shall be incorporated into this 0 by
this  reference  for  all  purposes.  If  Tenant  requests  any  changes  to  the  First  Expansion  Premises  Work  described  in  the  First  Expansion
Premises  Space  Plans  or  the  First  Expansion  Premises  Working  Drawings,  then  such  increased  costs  and  any  additional  design  costs
incurred in connection therewith as the result of any such change shall be added to the First Expansion Premises Construction Costs.

6.

Definitions. As used herein, a “Tenant Delay Day” means each day of delay in the performance of the First Expansion
Premises Work that occurs (a) because Tenant fails to timely furnish any information or deliver or approve any required documents such as
the First Expansion Premises Space Plans or First Expansion Premises Working Drawings (whether preliminary, interim revisions or final),
pricing  estimates,  construction  bids,  and  the  like,  (b)  because  of  any  change  by  Tenant  to  the  Space  Plans  or  First  Expansion  Premises
Working Drawings, (c) because Tenant fails to attend any meeting with Landlord, the Architect, any design professional, or any contractor,
or their respective employees or representatives, as may be required or scheduled hereunder or otherwise necessary in connection with the
preparation or completion of any construction documents, such as the First Expansion Premises Space Plans or First Expansion Premises
Working Drawings, or in connection with the performance of the First Expansion Premises Work, (d) because of any specification by Tenant
of  materials  or  installations  in  addition  to  or  other  than  Landlord’s  standard  finish-out  materials  or  any  materials  that  are  not  readily
available, or (e) because a Tenant Party otherwise delays completion of the First Expansion Premises Work. As used herein “Substantial
Completion,” “Substantially Completed,”  and  any  derivations  thereof  mean  the  First  Expansion  Premises  Work  in  the  First  Expansion
Premises  is  substantially  completed  (as  reasonably  determined  by  Landlord,  including,  if  applicable,  Landlord’s  receipt  of  a  Letter  of
Completion  or  other  similar  approval  from  the  City  of  Boulder)  in  substantial  accordance  with  the  First  Expansion  Premises  Working
Drawings. Substantial Completion shall have occurred even though minor details of construction, decoration, landscaping and mechanical
adjustments remain to be completed by Landlord.

7.

Walk-Through;  Punchlist.  When  Landlord  considers  the  First  Expansion  Premises  Work  in  the  First  Expansion

Premises to be Substantially Completed, Landlord will notify Tenant and,

within  three  business  days  thereafter,  Landlord’s  representative  and  Tenant’s  representative  shall  conduct  a  walk-through  of  the  First
Expansion Premises and identify any necessary touch-up work, repairs and minor completion items that are necessary for final completion
of the First Expansion Premises Work. Neither Landlord’s representative nor Tenant’s representative shall unreasonably withhold his or her
agreement on punchlist items. Landlord shall use reasonable efforts to cause the contractor performing the First Expansion Premises Work
to complete all punchlist items within 30 days after agreement thereon; however, Landlord shall not be obligated to engage overtime labor in
order to complete such items.

8.

Excess  Costs.  Tenant  shall  pay  the  entire  amount  by  which  the  First  Expansion  Premises  Construction  Costs
(hereinafter  defined)  exceed  the  First  Expansion  Premises  Construction  Allowance  (hereinafter  defined)  (such  excess  amount  being
referred  to  herein  as  the  “Excess  Amount”).  Upon  approval  of  the  First  Expansion  Premises  Working  Drawings  and  selection  of  a
contractor, Tenant shall promptly (a) execute a work order agreement prepared by Landlord which identifies such drawings and itemizes the
First Expansion Premises Construction Costs and sets forth the First Expansion Premises Construction Allowance, and (b) pay to Landlord
50%  of  Landlord’s  estimate  of  the  Excess  Amount.  Within  30  days  after  Substantial  Completion  of  the  First  Expansion  Premises  Work,
Tenant shall pay to Landlord any remaining unpaid portion of the Excess Amount. In the event of default of payment of any portion of the
Excess Amount, Landlord (in addition to all other remedies) shall have the same rights as for an Event of Default under this Lease. As used
herein,  “First  Expansion  Premises  Construction  Costs”  means  the  entire  cost  of  performing  the  First  Expansion  Premises  Work,
including design of and space planning for the First Expansion Premises Work and preparation of the First Expansion Premises Working
Drawings  and  the  final  “as-built”  plan  of  the  First  Expansion  Premises  Work,  costs  of  construction  labor  and  materials,  electrical  usage
during construction, additional janitorial services, standard building directory and suite tenant signage, related taxes and insurance costs,
licenses,  permits,  certifications,  surveys  and  other  approvals  required  by  Law,  any  applicable  governmental  fees,  and  the  construction
supervision fee referenced in Section 11 of this Exhibit.

9.

First Expansion Premises Construction Allowance. Landlord shall provide to Tenant a construction allowance not to
exceed $60.00 per rentable square foot in the First Expansion Premises (the “First Expansion Premises Construction Allowance”) to be
applied toward the First Expansion Premises Construction Costs, as adjusted for any changes to the First Expansion Premises Work. The
First Expansion Premises Construction Allowance shall not be disbursed to Tenant in cash, but shall be applied by Landlord to the payment
of the First Expansion Premises Construction Costs, if, as, and when the cost of the First Expansion Premises Work is actually incurred and
paid by Landlord. The First Expansion Premises Construction Allowance must be used (that is, the First Expansion Premises Work must be
fully  complete  and  the  First  Expansion  Premises  Construction  Allowance  disbursed)  within  18  months  following  the  First  Expansion
Premises Commencement Date (the “Allowance Deadline”) or shall be deemed forfeited with no further obligation by Landlord with respect
thereto, time being of the essence with respect thereto; provided, however, that if both parties are diligently pursuing completion of the First
Expansion  Premises  Work,  the  Allowance  Deadline  will  be  extended  by  one  day  for  each  delay  day  caused  by  any  force  majeure  event
described in Section 25.3 of the Existing Lease. In no event shall any portion of the First Expansion Premises Construction Allowance be
used towards the cost of the Work in the Existing Premises or towards the payment of Rent.

10.

First Expansion Premises Space Plan Allowance. Landlord will provide up to $0.15 per rentable square foot of the
First  Expansion  Premises  (the  “First  Expansion  Premises  Space  Plan  Allowance”)  to  be  applied  towards  the  costs  incurred  for
Architect's  preparation  of  the  Space  Plans.  Tenant  shall  be  responsible  for  any  space  planning  costs  incurred  in  excess  of  the  First
Expansion  Premises  Space  Plan  Allowance.  The  First  Expansion  Premises  Space  Plan  Allowance  is  in  addition  to  the  First  Expansion
Premises Construction Allowance. In no event shall any portion of the First Expansion Premises Space Plan Allowance be used to fund any
portion of the First Expansion Premises Construction Costs or to offset Tenant's Rent payments under the Lease. If the Architect is engaged
by  Landlord,  and  the  cost  of  the  space  plan  exceeds  the  First  Expansion  Premises  Space  Plan  Allowance,  such  excess  costs  will  be
considered  First  Expansion  Premises  Construction  Costs  and  payable  by  Tenant  in  accordance  with  Section 8  of  this  Exhibit.  The  First
Expansion Premises Space Plan Allowance

shall  not  be  disbursed  to  Tenant  in  cash,  but  shall  be  applied  by  Landlord  to  the  payment  of  the  First  Expansion  Premises  Construction
Costs,  if,  as,  and  when  the  cost  of  the  First  Expansion  Premises  Work  is  actually  incurred  and  paid  by  Landlord.  The  First  Expansion
Premises Space Plan Allowance must be used (that is, the First Expansion Premises Work must be fully complete and the First Expansion
Premises Space Plan Allowance disbursed) on or before the Allowance Deadline or shall be deemed forfeited with no further obligation by
Landlord with respect thereto, time being of the essence with respect thereto; provided, however, that if both parties are diligently pursuing
completion of the First Expansion Premises Work, the Allowance Deadline will be extended by one day for each delay day caused by any
force majeure event described in Section 25.3 of the Existing Lease.

11.

Construction Management. Landlord or its Affiliate or agent shall supervise the First Expansion Premises Work, make
disbursements  required  to  be  made  to  the  contractor,  and  act  as  a  liaison  between  the  contractor  and  Tenant  and  coordinate  the
relationship between the First Expansion Premises Work, the Project and the Building’s Systems. Landlord or its Affiliate or agent shall use
commercially reasonable efforts to coordinate weekly telephonic or in-person status meetings with Tenant’s Representative. In consideration
for Landlord’s construction supervision services, Tenant shall pay to Landlord a construction supervision fee equal to five percent of the First
Expansion Premises Construction Costs (exclusive of the construction supervision fee).

12.

Construction Representatives. Landlord’s and Tenant’s representatives for coordination of construction and approval

of change orders will be as follows, provided that either party may change its representative upon written notice to the other:

Landlord’s Representative:

Tenant’s Representative:

Rob Van Vleet
c/o WWR Real Estate Services, LLC 1375 Walnut
Street, Suite 10
Boulder, CO 80302
Telephone: 303.442.8687 Email:
rob@wwreynolds.com

Rick Gurmendi Telephone: 303.884.4166
Email: rgurmendi@yahoo.com

13.

Miscellaneous. To the extent not inconsistent with this Exhibit, Sections 8.1 and 21 of the Existing Lease shall govern
the  performance  of  the  First  Expansion  Premises  Work  and  Landlord’s  and  Tenant’s  respective  rights  and  obligations  regarding  the
improvements installed pursuant thereto.

EXHIBIT C
CONFIRMATION OF FIRST EXPANSION PREMISES COMMENCEMENT DATE

Dicerna Pharmaceuticals, Inc. 4949 Pearl East Circle, Suite 100
Boulder, Colorado 80301

    , 2020

Re: Lease Agreement dated August 26, 2019 (“Original Lease”), as amended by the First Amendment to Lease Agreement dated
January ,  2020  (“First Amendment”  and  collectively  with  the  Original  Lease,  the  “Lease”)  between  WESTERN  OFFICE
PORTFOLIO  PROPERTY  OWNER  LLC,  a  Delaware 
(“Landlord”),  and  DICERNA
PHARMACEUTICALS, INC.,  a  Delaware  corporation  (“Tenant”).  Capitalized  terms  used  herein  but  not  defined  shall  be
given the meanings assigned to them in the First Amendment.

liability  company 

limited 

Ladies and Gentlemen:

Landlord and Tenant agree as follows:

1.

Condition of First Expansion Premises. Tenant has accepted possession of the First Expansion Premises pursuant to

the First Amendment. Furthermore, Tenant acknowledges that the First Expansion Premises are suitable for the Permitted Use.

2.

3.

First Expansion Premises Commencement Date. The First Expansion Premises Commencement Date is     , 2020.

Expiration Date. The First Expansion Premises Term shall be coterminous with the expiration of the Original Lease.

4.

Ratification.  Tenant  hereby  ratifies  and  confirms  its  obligations  under  the  Lease,  and  represents  and  warrants  to
Landlord that it has no defenses thereto. Additionally, Tenant further confirms and ratifies that, as of the date hereof, (a) the Lease is and
remains in good standing and in full force and effect, and (b) Tenant has no claims, counterclaims, set-offs or defenses against Landlord
arising out of the Lease or in any way relating thereto or arising out of any other transaction between Landlord and Tenant.

5.

Binding Effect; Governing Law. Except as modified hereby, the Lease shall remain in full effect and this letter shall be
binding upon Landlord and Tenant and their respective successors and assigns. If any inconsistency exists or arises between the terms of
this letter and the terms of the Lease, the terms of this letter shall prevail. This letter shall be governed by the laws of the state in which the
Premises are located.

Please indicate your agreement to the above matters by signing this letter in the space indicated below and returning an executed

original to us.

Sincerely,

    , on behalf of Landlord

By:     Name:     Title:     

Agreed and accepted:

DICERNA PHARMACEUTICALS, INC.,
a Delaware corporation

By:     Name:     Title:     

EXHIBIT D RIGHT OF FIRST OFFER

Subject to then-existing renewal or expansion options or other preferential rights of other tenants, Landlord shall, prior to offering
any suite on the third floor of the Building that is adjacent to the First Expansion Premises (the “Offer Space”) to any party (other than the
then-current  tenant  or  occupant  therein),  first  offer  to  lease  to  Tenant  the  Offer  Space  in  an  “AS-IS”  condition;  such  offer  shall  (a)  be  in
writing, (b) specify the part of the Offer Space being offered to Tenant hereunder (the “Designated Offer Space”), and (c) specify the lease
terms for the Designated Offer Space, including the rent to be paid for the Designated Offer Space and the date on which the Designated
Offer  Space  shall  be  included  in  the  Premises  (the  “Offer  Notice”).  The  Offer  Notice  shall  be  substantially  similar  to  the  Offer  Notice
attached  to  this  Exhibit.  Tenant  shall  notify  Landlord  in  writing  whether  Tenant  elects  to  lease  the  entire  Designated  Offer  Space  on  the
terms set forth in the Offer Notice, within three days after Landlord delivers to Tenant the Offer Notice. If Tenant timely elects to lease the
Designated Offer Space, then Landlord and Tenant shall execute an amendment to this Lease, effective as of the date the Designated Offer
Space is to be included in the Premises, on the terms set forth in the Offer Notice and, to the extent not inconsistent with the Offer Notice
terms,  the  terms  of  this  Lease;  however,  Tenant  shall  accept  the  Designated  Offer  Space  in  an  “AS-IS”  condition  and  Landlord  shall  not
provide  to  Tenant  any  allowances  (e.g.,  moving  allowance,  construction  allowance,  and  the  like)  or  other  tenant  inducements  except  as
specifically provided in the Offer Notice. Notwithstanding anything in this Exhibit to the contrary, if prior to Landlord’s delivery to Tenant of
the Offer Notice, Landlord has received a Third Party Offer to lease all or part of the Offer Space, and Landlord is willing to accept the terms
of  such  Third  Party  Offer,  and  such  Third  Party  Offer  includes  space  in  excess  of  the  Offer  Space,  then  Tenant  must  exercise  its  rights
hereunder, if at all, as to all of the space contained in the Third Party Offer. To the extent that multiple tenants have rights to lease the Offer
Space,  Landlord  may  elect  to  deliver  an  Offer  Notice  to  Tenant  and  such  third  party  tenants  at  the  same  time,  and  if  both  Tenant  and
another third party tenant accept the Offer Notice, the party with the superior rights shall prevail.

If Tenant fails or is unable to timely exercise its right hereunder with respect to the Designated Offer Space, then such right shall
lapse with respect to the Designated Offer Space, time being of the essence with respect to the exercise thereof (it being understood that
Tenant’s right hereunder is a one- time right only as to each Designated Offer Space the first time it is offered to Tenant hereunder), and
Landlord  may  lease  all  or  a  portion  of  the  Designated  Offer  Space  to  third  parties  on  such  terms  as  Landlord  may  elect.  For  purposes
hereof, if an Offer Notice provides for an expansion, right of first refusal, or other preferential right to lease some of the remaining portion of
the  Offer  Space,  then  such  remaining  portion  of  the  Offer  Space  shall  thereafter  be  excluded  from  the  provisions  of  this  Exhibit.  Unless
otherwise agreed in writing by Landlord and Tenant’s real estate broker, in no event shall Landlord be obligated to pay a commission with
respect  to  any  space  leased  by  Tenant  under  this  Exhibit,  and  Tenant  and  Landlord  shall  each  indemnify  the  other  against  all  costs,
expenses, attorneys’ fees, and other liability for commissions or other compensation claimed by any broker or agent claiming the same by,
through or under the indemnifying party.

Tenant’s  rights  under  this  Exhibit  shall  terminate,  at  Landlord’s  option,  if  (a)  an  Event  of  Default  exists  as  of  the  date  of  Tenant’s
exercise  of  its  rights  under  this  Exhibit  or  as  of  the  effective  date  of  the  addition  of  the  Designated  Offer  Space  to  the  Premises,  (b)  the
Lease or Tenant’s right to possession of any of the Premises is terminated, (c) Tenant assigns its interest in the Lease or sublets any portion
of the Premises, (d) Tenant fails to lease from Landlord and occupy at least the same number of rentable square feet leased to Tenant as of
the First Expansion Premises Commencement Date, (e) Landlord determines, in its sole but reasonable discretion, that Tenant’s financial
condition or creditworthiness has materially deteriorated since the date of the First Amendment, (f) Tenant fails to timely exercise its option
under this Exhibit, time being of the essence with respect to Tenant’s exercise thereof, or (g) less than two full calendar years remain in the
initial Term of the Lease.

Tenant’s rights under this Exhibit shall not apply to leases that allow tenants in the Building to use such space as unfinished storage

area and other temporary leases to provide temporary space to tenants

that ultimately will occupy other space in the Building on a permanent basis, any management space, tenant relocation space and other
building space/amenities (conference center, fitness center, etc.).

FORM OF OFFER NOTICE

[Insert Date of Notice]

BY FEDEX

Dicerna Pharmaceuticals, Inc. 4949 Pearl East Circle, Suite 100
Boulder, Colorado 80301

Re: Lease Agreement dated August 26, 2019 (“Original Lease”), as amended by the First Amendment to Lease Agreement dated
January ,  2020  (“First Amendment”  and  collectively  with  the  Original  Lease,  the  “Lease”)  between  WESTERN  OFFICE
PORTFOLIO  PROPERTY  OWNER  LLC,  a  Delaware 
(“Landlord”),  and  DICERNA
PHARMACEUTICALS, INC.,  a  Delaware  corporation  (“Tenant”).  Capitalized  terms  used  herein  but  not  defined  shall  be
given the meanings assigned to them in the Lease.

liability  company 

limited 

Ladies and Gentlemen:

Pursuant to the Right of First Offer attached to the First Amendment, this is an Offer Notice on Suite     . The basic terms and

conditions are as follows:

LOCATION:         

SIZE:         rentable square feet

BASIC RENT RATE:    Initially, $     per rentable square foot in the Designated Offer Space,
with     % annual increases

TERM:         

IMPROVEMENTS:         

COMMENCEMENT:         

PARKING TERMS:         

OTHER MATERIAL TERMS:         

Under the terms of the Right of First Offer, you must exercise your rights, if at all, as to the Designated Offer Space on the depiction

attached to this Offer Notice within three days after Landlord delivers such Offer Notice. Accordingly, you have until 5:00 p.m. local time on
    , 20 , to exercise your rights under the Right of First Offer and accept the terms as contained herein, failing which your rights under the
Right of First Offer shall terminate and Landlord shall be free to lease the Designated Offer Space to any third party. If possible, any earlier
response would be appreciated. Please note that your acceptance of this Offer Notice shall be irrevocable and may not be rescinded.

Upon receipt of your acceptance herein, Landlord and Tenant shall execute an amendment to the Lease memorializing the terms of
this Offer Notice including the inclusion of the Designated Offer Space in the Premises; provided, however, that the failure by Landlord and
Tenant to execute such amendment

shall not affect the inclusion of such Designated Offer Space in the Premises in accordance with this Offer Notice.

THE  FAILURE  TO  ACCEPT  THIS  OFFER  NOTICE  BY  (a)  DESIGNATING  THE  “ACCEPTED”  BOX,  AND  (b)  EXECUTING  AND
RETURNING  THIS  OFFER  NOTICE  TO  LANDLORD  WITHOUT  MODIFICATION  WITHIN  SUCH  TIME  PERIOD  SHALL  BE  DEEMED  A
WAIVER OF TENANT’S RIGHTS UNDER THE RIGHT OF FIRST OFFER, AND TENANT SHALL HAVE NO FURTHER RIGHTS TO THE
DESIGNATED  OFFER  SPACE.  THE  FAILURE  TO  EXECUTE  THIS  LETTER  WITHIN  SUCH  TIME  PERIOD  SHALL  BE  DEEMED  A
WAIVER OF THIS OFFER NOTICE.

Should you have any questions, do not hesitate to call.

Sincerely,

    , on behalf of Landlord

By:     

Name:     

Title:     

[please check appropriate box] ACCEPTED    ☐

REJECTED    ☐

By:     Name:     Title:     Date:     

Enclosure [attach depiction of Designated Offer Space]

Execution Date:
Tenant:

Tenant’s Mailing
Address:

Landlord:

Building:

Campus:

Premises:

75 HAYDEN AVENUE

LEXINGTON, MASSACHUSETTS 02421 LEASE SUMMARY SHEET

Exhibit 10.53

January 14, 2020

DICERNA PHARMACEUTICALS, INC., a Delaware corporation

33 Hayden Avenue
Lexington, MA 02421
Attn: David W. Miller, PhD, SVP

HCP/KING 75 HAYDEN LLC,
a Delaware limited liability company

75  Hayden  Avenue,  Lexington,  Massachusetts  02421.  The  Building  is  currently  under
construction and shall consist of four (4) stories and contain approximately 214,440 rentable
square  feet.  The  land  (the  “Land”)  on  which  the  Building  is  located  is  described  as
“Building 75” on Exhibit 2A attached hereto and made a part hereof.

All of the land described on Exhibit 2B (including the Land described above, which Land is
a portion of the land described on Exhibit 2B) together with the Building described above,
the buildings now known as and numbered 45 Hayden Avenue, 55 Hayden Avenue and 65
Hayden Avenue (“Building 65”), and any other building and/or improvements constructed
on  the  Land.  The  Campus  includes  an  existing  nine-story  garage  with  1,091  spaces  (the
“Garage”) which is used in common by the tenants of the Campus.

Areas  on  the  first  (1st)  floor,  the  fourth  (4th)  floor,  the  Penthouse  and  the  roof  of  the
Building,  containing  approximately  61,282  rentable  square  feet  in  the  aggregate.  The
Premises consist of:

Prime Premises, which will be located on the entire fourth (4th) floor;

PH  System  Premises,  which  will  be  located  on  the  first  (1st)  floor.  The  PH  System
Premises are located in a common room (the “PH System Room”) which contains the PH
systems of other tenants;

Storage Premises, which will be located on the first (1st) floor. The Storage Premises are
located  in  a  common  room  (the  “Storage  Room”)  which  contains  storage  areas  of  other
tenants; and

1

Penthouse  Equipment  Premises,  which  will  be  located  on  the  Penthouse  floor.  The
Penthouse Equipment Premises are located in a common room (the “Penthouse Equipment
Room”) which contains equipment of other tenants.

Generator Area, as defined in Section 1.3(c), which will be located on the roof.

The  term  “Premises”  shall  mean  the  Prime  Premises,  PH  System  Premises,  Storage
Premises, Penthouse Equipment Premises and Generator Area, as applicable. The Premises
are  shown  on  the  Lease  Plans  attached  hereto  as  Exhibit  1A,  Exhibit  1B,  Exhibit  1C,
Exhibit 1D, and Exhibit 1E and made a part hereof.

Landlord and Tenant stipulate and agree that the Rentable Square Footage of the Building
and the Rentable Square Footage of the Premises are correct and shall not be remeasured.

The Building, the Garage, the Land, and other improvements located on, and to be
constructed on, the Land.

The parking structures (surface lots and parking decks, including the Garage adjacent to
the Building) located on the Campus that Landlord provides for parking by all tenants of
space on the Property. The parties acknowledge that the parking garage serving 65 Hayden
Avenue is not included in the Parking Areas.

The earlier of (i) the date that Tenant first commences to use the Premises, or any portion
thereof, for any Permitted Use or (ii) the Substantial Completion, as hereinafter defined, of
Base  Building  Work,  as  hereinafter  defined,  and  the  Tenant  Improvement  Work,  as
hereinafter defined. The parties estimate that that the Term Commencement Date will occur
on or about October 1, 2020 (“Estimated Term Commencement Date”).

The date that is five (5) months after the Term Commencement Date.

Ten  (10)  years  after  the  Rent  Commencement  Date,  except  that  if  the  Rent
Commencement  Date  does  not  occur  on  the  first  day  of  a  calendar  month,  then  the
Expiration Date shall be the last day of the calendar month in which the date ten (10) years
after the Rent Commencement Date occurs.

Property:

Parking Areas:

Term Commencement
Date:

Rent Commencement
Date:

Expiration Date:

Extension Term(s):

Subject to Section 1.2 below, two (2) extension term(s) of five (5) years each.

 
Landlord’s
Contribution:

Permitted Uses:

$6,128,200 (i.e., $100.00 per rentable square foot of the Premises)

Subject to Legal Requirements, Tenant shall have the right to use the following portions of
the Premises only for the following uses:

Prime Premises: General office, research, development, warehouse and laboratory use, and
other ancillary uses related to the foregoing;

PH System Premises: Operation and maintenance of Tenant’s Acid Neutralization Tank;

Storage Premises: Subject to Section 17.1 hereof, storage of Tenant’s Hazardous Materials,
waste and other materials used or generated by Tenant in the Premises; and

Penthouse  Equipment  Premises:  Installation,  operation  and  maintenance  of  Tenant’s
Penthouse Equipment.

Base Rent:

RENT YEAR

ANNUAL BASE RENT

MONTHLY PAYMENT

Rent Year 1
Rent Year 2
Rent Year 3
Rent Year 4
Rent Year 5
Rent Year 6
Rent Year 7
Rent Year 8
Rent Year 9
Rent Year 10

$3,646,279.00*
$3,755,973.78
$3,868,732.66
$3,984,555.64
$4,104,055.54
$4,227,232.36
$4,354,086.10
$4,484,616.76
$4,619,437.16
$4,757,934.48

$303,856.58*
$312,997.82
$322,394.39
$332,046.30
$342,004.63
$352,269.36
$362,840.51
$373,718.06
$384,953.10
$396,494.54

Rent Year:

Rent  Year  1  shall  be  the  twelve-(12)-month  period  commencing  as  of  the  Rent
Commencement Date, except that if the Rent Commencement Date occurs on other than the
first  day  of  a  calendar  month,  then  Rent  Year  1  shall  commence  as  of  the  Rent
Commencement Date and shall end on the last day of the calendar year in which the first
anniversary  of  the  Rent  Commencement  Date  occurs.  Each  Rent  Year  after  Rent  Year  1
shall be the twelve-(12)-month
period immediately following the preceding Rent Year.

 
Operating Costs and
Taxes:

Tenant’s Share:

See Sections 5.2 and 5.3.

A fraction, the numerator of which is the number of rentable square feet in the Premises
and the denominator of which is the number of rentable square feet in the Building. As of
the Execution Date, Tenant’s Share with respect to the Premises is 28.58%.

Security Deposit/ Letter of
Credit:

Guarantor:

$1,519,282.90

None.

EXHIBIT 1A
EXHIBIT 1B
EXHIBIT 1C
EXHIBIT 1D

EXHIBIT 2A
EXHIBIT 2B
EXHIBIT 3
EXHIBIT 4
EXHIBIT 4-1
EXHIBIT 4-2
EXHIBIT 4-3
EXHIBIT 5
EXHIBIT 6
EXHIBIT 7
EXHIBIT 8
EXHIBIT 9-1
EXHIBIT 9-2
EXHIBIT 10
EXHIBIT 11
EXHIBIT 12

LEASE PLAN - PRIME PREMISES
LEASE PLAN - PH SYSTEM PREMISES
LEASE PLAN - STORAGE PREMISES
LEASE PLAN – PENTHOUSE EQUIPMENT PREMISES AND
GENERATOR AREA
LEGAL DESCRIPTION - LAND
LEGAL DESCRIPTION
PARKING AREAS
WORK LETTER
BASE BUILDING PLANS
TENANT/LANDLORD RESPONSIBILITY MATRIX
TENANT SCHEMATIC PLAN
BASE BUILDING CAPACITIES
FORM OF LETTER OF CREDIT
LANDLORD’S SERVICES
[Intentionally Deleted]
BUILDING RULES AND REGULATIONS
CONSTRUCTION RULES AND REGULATIONS
TENANT WORK INSURANCE SCHEDULE
[Intentionally Deleted]
PLAN—LOADING DOCKS, RECEPTION AREA, AND FREIGHT
ELEVATORS

1. LEASE GRANT; TERM; APPURTENANT RIGHTS; EXCLUSIONS    1

TABLE OF CONTENTS

1.1
1.2
1.3
1.4
1.5
1.6
1.7

Lease Grant    1
Extension Terms    1
Appurtenant Rights    2
Tenant’s Access    6
No recording // Notice of Lease    7
Exclusions    7
Acid Neutralization Tank    7

2. RIGHTS RESERVED TO LANDLORD    9

Additions and Alterations    9
2.8
2.9
Additions to the Property    9
2.10 Name and Address of Building    10
2.11
2.12
2.13 Minimize Interference; Tenant Representative    11

Landlord’s Access    10
Pipes, Ducts and Conduits    11

3. CONDITION OF PREMISES; CONSTRUCTION.    12

3.14 Condition of Premises    12
Landlord’s Work    12
3.15

4. USE OF PREMISES    14

Permitted Uses    14
4.16
Prohibited Uses    14
4.17
4.18
Transportation of Animals    15
4.19 Chemical Safety Program    15
4.20
4.21 Vivarium    16

Parking and Traffic Demand Management Plan    16

5. RENT; ADDITIONAL RENT    16

5.22 Base Rent    16
5.23 Operating Costs    16
5.24
5.25
5.26 No Offset; Independent Covenants; Waiver    22
5.27

Taxes    19
Late Payments    21

Survival    22

6.

INTENTIONALLY DELETED.    22

7. LETTER OF CREDIT    22

7.28 Amount    22
7.29 Application of Proceeds of Letter of Credit    23
7.30

Transfer of Letter of Credit    24

7.31 Cash Proceeds of Letter of Credit    24
7.32 Return of Security Deposit or Letter of Credit    24

8.

INTENTIONALLY OMITTED    24

9. UTILITIES, LANDLORD’S SERVICES    24

Electricity    24

9.33
9.34 Water    24
9.35 Gas    25
9.36 Other Utilities    25
9.37
9.38

Interruption or Curtailment of Utilities    25
Landlord’s Services    25

10. MAINTENANCE AND REPAIRS    26

10.39 Maintenance and Repairs by Tenant    26
10.40 Maintenance and Repairs by Landlord    26
10.41 Accidents to Sanitary and Other Systems    26
10.42 Floor Load--Heavy Equipment    26
10.43 Premises Cleaning    27
10.44 Pest Control    27
10.45 Service Interruptions    27

11. ALTERATIONS AND IMPROVEMENTS BY TENANT    28

11.46 Landlord’s Consent Required    28
11.47 After-Hours    29
11.48 Harmonious Relations    29
11.49 Liens    30
11.50 General Requirements    30

12. SIGNAGE    30

12.51 Restrictions    30
12.52 Exterior Signage    30
12.53 Building Directory    31

13. ASSIGNMENT, MORTGAGING AND SUBLETTING    31

13.54 Landlord’s Consent Required    31
13.55 Landlord’s Recapture Right    31
13.56 Standard of Consent to Transfer    32
13.57 Listing Confers no Rights    32
13.58 Profits In Connection with Transfers    32
13.59 Prohibited Transfers    32
13.60 Exceptions to Requirement for Consent    33

14. INSURANCE; INDEMNIFICATION; EXCULPATION    33

14.61 Tenant’s Insurance    33
14.62 Indemnification    34

14.63 Property of Tenant    35
14.64 Limitation of Landlord’s Liability for Damage or Injury    35
14.65 Waiver of Subrogation; Mutual Release    36
14.66 Tenant’s Acts--Effect on Insurance    36

14.67 Landlord’s Insurance    36

15. CASUALTY; TAKING    37

15.68 Damage    37
15.69 Termination Rights    37
15.70 Rent Abatement    38
15.71 Taking for Temporary Use    38
15.72 Disposition of Awards    39

16. ESTOPPEL CERTIFICATE.    39

17. HAZARDOUS MATERIALS    39

17.73 Prohibition    39
17.74 Environmental Laws    40
17.75 Hazardous Material Defined    41
17.76 Chemical Safety Program    41
17.77 Testing    41
17.78 Indemnity; Remediation    42
17.79 Disclosures    43
17.80 Removal    43

18.

RULES AND REGULATIONS    43

18.1 Rules and Regulations    43
18.2
18.3 Recycling    44

Energy Conservation    44

19.

LAWS AND PERMITS    44

19.1

Legal Requirements    44

20.

DEFAULT    45

Events of Default    45

Landlord’s Self-Help; Fees and Expenses    48

20.1
20.2 Remedies    47
20.3 Damages - Termination    47
20.4
20.5 Waiver of Redemption, Statutory Notice and Grace Periods    49
20.6
20.7 No Waiver    49
20.8 Restrictions on Tenant’s Rights    49
20.9

Landlord’s Remedies Not Exclusive    49

Landlord Default    49

21.

SURRENDER; ABANDONED PROPERTY; HOLD-OVER    50

21.1

Surrender    50

21.2 Abandoned Property    51
21.3 Holdover    52
21.4 Warranties    52

22. MORTGAGEE RIGHTS    52

22.1

Subordination    52

22.2 Notices    52
22.3 Mortgagee Consent    53
22.4 Mortgagee Liability    53

QUIET ENJOYMENT    53

NOTICES    53

23.

24.

25. MISCELLANEOUS    54

Expenses Incurred by Landlord Upon Tenant Requests    55
Survival    55
Limitation of Liability    55

Separability    54

Entire Agreement    54

25.1
25.2 Captions    54
25.3 Broker    54
25.4
25.5 Governing Law    54
25.6 Representation of Authority    55
25.7
25.8
25.9
25.10 Binding Effect    55
25.11 Landlord Obligations upon Transfer    55
25.12 No Grant of Interest    56
25.13 Financial Information    56
25.14 OFAC Certificate and Indemnity    56
25.15 Confidentiality    57
25.16 Force Majeure    57
25.17 Right of First Offer    57

THIS INDENTURE OF LEASE (this “Lease”) is hereby made and entered into on the Execution Date by and between

Landlord and Tenant.

Each reference in this Lease to any of the terms and titles contained in any Exhibit attached to this Lease shall be deemed
and construed to incorporate the data stated under that term or title in such Exhibit. All capitalized terms not otherwise defined
herein  shall  have  the  meanings  ascribed  to  them  as  set  forth  in  the  Lease  Summary  Sheet  which  is  attached  hereto  and
incorporated herein by reference.

1.

LEASE GRANT; TERM; APPURTENANT RIGHTS; EXCLUSIONS

1.1       Lease Grant.  Landlord  hereby  leases  to  Tenant,  and  Tenant  hereby  leases  from  Landlord,  the  Premises  upon  and
subject  to  terms  and  conditions  of  this  Lease,  for  a  term  of  years  commencing  on  the  Term  Commencement  Date  and,  unless
earlier terminated or extended pursuant to the terms hereof, ending on the Expiration Date (the “Initial Term”;  the  Initial  Term
and any duly exercised Extension Terms are hereinafter collectively referred to as the “Term”).

1.2

Extension Terms.

(a)    Provided that the following conditions, which may be waived by Landlord in its sole discretion, are satisfied
(i)  Tenant,  an  Affiliated  Entity  (hereinafter  defined)  and/or  a  Successor  (hereinafter  defined)  are  then  occupying  at  least  sixty
percent  (60%)  of  the  Premises;  and  (ii)  no  Event  of  Default  then  exists  (1)  as  of  the  date  of  the  Extension  Notice  (hereinafter
defined),  and  (2)  at  the  commencement  of  the  applicable  Extension  Term  (hereinafter  defined),  Tenant  shall  have  the  option  to
extend the Term for two (2) additional terms of five (5) years each (each, an “Extension Term”), commencing as of the expiration
of the Initial Term, or the prior Extension Term, as the case may be. Tenant must exercise such option to extend, if at all, by giving
Landlord written notice (each, an “Extension Notice”) on or before the date that is twelve (12) months’ prior to the expiration of
the then-current term of this Lease, time being of the essence. Upon the timely giving of such notice, the Term shall be deemed
extended for the applicable Extension Term upon all of the terms and conditions of this Lease, except that Base Rent during each
Extension Term shall be calculated in accordance with this Section 1.2, Landlord shall have no obligation to construct or renovate
the Premises, and Tenant shall have one (1) fewer option (in the case of the first Extension Term), or no further right (in the case of
the second Extension Term), to extend the Term. If Tenant fails to give timely notice, as aforesaid, Tenant shall have no further
right to extend the Term. Notwithstanding the fact that Tenant's proper and timely exercise of such option to extend the Term shall
be self executing, the parties shall promptly execute a lease amendment reflecting such Extension Term after Tenant exercises such
option.  The  execution  of  such  lease  amendment  shall  not  be  deemed  to  waive  any  of  the  conditions  to  Tenant's  exercise  of  its
rights under this Section 1.2.

(b)        The  Base  Rent  during  each  Extension  Term  (the  “Extension  Term  Base  Rent”)  shall  be  determined  in
accordance with the process described hereafter. Extension Term Base Rent shall be the greater of (i) Base Rent for the last Rent
Year of the prior Term, or (ii) the fair market rental value of the Premises then demised to Tenant as of the commencement of the
applicable Extension Term as determined in accordance with the process described below, for renewals of first class combination
laboratory and office space in the Route 128/Route 2/Boston

Suburban  West  real  estate  market  (the  “Market  Area”)  of  equivalent  quality,  size,  utility  and  location,  with  the  length  of  the
Extension Term, the credit standing of Tenant, and all other relevant factors to be taken into account. Within thirty (30) days after
receipt of the Extension Notice, Landlord shall deliver to Tenant written notice of its determination of the Extension Term Base
Rent for the applicable Extension Term. Tenant shall, within thirty (30) days after receipt of such notice, notify Landlord in writing
whether Tenant accepts or rejects Landlord’s determination of the Extension Term Base Rent (“Tenant’s Response Notice”). If
Tenant  fails  timely  to  deliver  Tenant’s  Response  Notice,  Landlord’s  determination  of  the  Extension  Term  Base  Rent  shall  be
binding on Tenant.

(c)    If and only if Tenant’s Response Notice is timely delivered to Landlord and indicates both that Tenant rejects
Landlord’s determination of the Extension Term Base Rent and desires to submit the matter to arbitration, then the Extension Term
Base Rent shall be determined in accordance with the procedure set forth in this Section 1.2(c). In such event, within ten (10) days
after  receipt  by  Landlord  of  Tenant’s  Response  Notice  indicating  Tenant’s  desire  to  submit  the  determination  of  the  Extension
Term  Base  Rent  to  arbitration,  Tenant  and  Landlord  shall  each  notify  the  other,  in  writing,  of  their  respective  selections  of  an
appraiser (respectively, “Landlord’s Appraiser” and “Tenant’s Appraiser”). Landlord’s Appraiser and Tenant’s Appraiser shall
then  jointly  select  a  third  appraiser  (the  “Third  Appraiser”)  within  ten  (10)  days  of  their  appointment.  All  of  the  appraisers
selected  shall  be  individuals  with  at  least  five  (5)  consecutive  years’  commercial  appraisal  experience  for  office  and  laboratory
space in the area in which the Premises are located, shall be members of the Appraisal Institute (M.A.I.), and, in the case of the
Third Appraiser, shall not have acted in any capacity for either Landlord or Tenant within five (5) years of his or her selection. The
three appraisers shall determine the Extension Term Base Rent in accordance with the requirements and criteria set forth in Section
1.2(b)  above,  employing  the  method  commonly  known  as  Baseball  Arbitration,  whereby  Landlord’s  Appraiser  and  Tenant’s
Appraiser each sets forth its determination of the Extension Term Base Rent as defined above, and the Third Appraiser must select
one or the other (it being understood that the Third Appraiser shall be expressly prohibited from selecting a compromise figure).
Landlord’s  Appraiser  and  Tenant’s  Appraiser  shall  deliver  their  determinations  of  the  Extension  Term  Base  Rent  to  the  Third
Appraiser within five (5) days of the appointment of the Third Appraiser and the Third Appraiser shall render his or her decision
within ten (10) days after receipt of both of the other two determinations of the Extension Term Base Rent. The Third Appraiser’s
decision shall be binding on both Landlord and Tenant. Each party shall bear the cost of its own appraiser and the cost of the Third
Appraiser shall be paid by the party whose determination is not selected.

1.3

Appurtenant Rights.

(a)    Common Areas. Subject to the terms of this Lease and the Rules and Regulations (hereinafter defined), Tenant
shall have, as appurtenant to the Premises, rights to use in common with others entitled thereto, the following areas (such areas are
hereinafter referred to  as  the  “Common Areas”):  (i)  the  common  loading  docks,  hallways,  lobby,  and  elevator  of  the  Building
serving the Premises, (ii) the common lavatories located on the floor(s) on which the Premises are located, (iii) common walkways
and driveways necessary for access to the Building,
(iv)  the  Parking  Areas,  and  (v)  other  areas  and  facilities  located  in  the  Building,  on  the  Land,  or  elsewhere  on  the  Campus
designated by Landlord from time to time for the common use of tenants of the Building and other entitled thereto; and no other
appurtenant rights or easements. “Rules

and  Regulations”  shall  be  defined  as  the  rules  and  regulations  promulgated  by  Landlord  pursuant  to,  and  subject  to,  the
provisions of Section 18.1 of this Lease. The two (2) loading docks, receiving area, and freight elevators shown on Exhibit 12,
attached hereto and incorporated herein, are available for the use of the tenants in the Building and are part of the Common Areas.

(b)    Parking. During the Term, Landlord shall, subject to the terms hereof, make available up to one hundred-fifty-
three  (153)  parking  spaces  (inclusive  of  the  Reserved  Parking  Spaces)  for  Tenant’s  use  free  of  charge  (except  that  the  costs  of
maintenance and repair of the parking areas shall, subject to the provisions of Section 5.2, be included in Operating Costs) in the
Garage (or, with respect to the Reserved Parking Spaces, within the executive parking area) as shown on Exhibit 3. The number of
parking spaces in the parking areas reserved for Tenant, as modified pursuant to this Lease or as otherwise permitted by Landlord,
are hereinafter referred to as the “Parking Spaces,”  and  shall  include  five  (5)  reserved  parking  spaces  located  in  the  executive
parking  area  located  on  the  north  side  of  the  Building  as  shown  in  Exhibit  3  (the  “Reserved Parking Spaces”).  In  addition  to
parking passenger motor vehicles, the Reserved Parking Spaces may be occupied by Tenant’s shuttle van/vehicle for picking up
and dropping off Tenant’s employees. Tenant shall have no right to hypothecate or encumber the Parking Spaces, and shall not
sublet,  assign,  or  otherwise  transfer  the  Parking  Spaces  other  than  to  employees  of  Tenant  occupying  the  Premises  or  to  a
Successor (hereinafter defined), an Affiliated Entity (hereinafter defined), or a transferee pursuant to an approved Transfer under
Section  13  of  this  Lease.  Subject  to  Landlord’s  right  to  reserve  parking  for  other  tenants  of  the  Building,  said  Parking  Spaces,
except  for  the  Reserved  Parking  Spaces,  will  be  on  an  unassigned,  non-reserved  basis,  and  all  Parking  Spaces,  including  the
Reserved Parking Spaces, shall be subject to such Rules and Regulations, as may be in effect for the use of the parking areas from
time to time. Reserved and handicap parking spaces must be honored. Landlord has installed and shall maintain charging stations
accommodating no fewer than eight (8) electrical vehicles on the first floor of the Garage for the non-exclusive use of Tenant and
other  occupants  of  the  Campus.  Notwithstanding  anything  to  the  contrary  contained  herein,  in  connection  with  maintenance,
repairs  or  other  construction  activities,  Landlord  shall  have  the  right,  upon  at  least  three  (3)  months’  written  notice  to  Tenant,
temporarily to relocate all or any portion of the Parking Spaces in to other parking areas owned, controlled or leased by Landlord
in the vicinity of the Property. Landlord shall use commercially reasonable efforts to minimize the period of any such relocation.

(c)    Generator Area. Landlord shall demise and lease the Generator Area, as hereinafter defined, to Tenant, and
Tenant shall hire and take the Generator Area from Landlord for the Lease Term. The “Generator Area” shall be defined as the
area on the roof of the Building shown on Exhibit 1E attached hereto. Tenant shall have the right to use the Generator Area solely
for  the  purpose  of  installing  and  using  Tenant’s  own  emergency  generator  (“Tenant’s  Generator”)  in  accordance  with  the
provisions  of  this  Section  1.3(c).  Tenant  shall  have  the  right  to  install  Tenant’s  Generator  in  accordance  with  the  terms  and
conditions of Article 11 below. Said demise of Tenant’s Generator Area shall be upon all of the same terms and conditions of the
Lease, except as set forth herein. Tenant shall not operate Tenant’s Generator until Landlord has obtained copies of all required
governmental permits, licenses, and authorizations necessary for the installation and operation of Tenant’s Generator. In addition,
Tenant  shall  comply  with  all  reasonable  construction  rules  and  regulations  promulgated  by  Landlord  in  the  maintenance  and
operation  of  Tenant’s  Generator.  Tenant  shall  be  permitted  to  use  Tenant’s  Generator  Area  solely  for  the  maintenance  and
operation of Tenant’s Generator, and Tenant’s Generator and Generator Area are

solely for the benefit of Tenant. All electricity generated by Tenant’s Generator may only be consumed by Tenant in the Premises.

(i)    Tenant shall have no obligation to pay Base Rent in respect of Tenant’s Generator Area.

electricity which will be measured by a submeter in accordance with Section 9.1.

(ii)        Landlord  shall  have  no  obligation  to  provide  any  services  to  Tenant’s  Generator  Area  other  than

(iii)        Tenant  shall  have  no  right  to  make  any  changes,  alterations,  additions,  decorations  or  other
improvements (collectively “Installations”) to Tenant’s Generator Area without Landlord’s prior written consent, which consent
Landlord may withhold in its sole but bona fide business judgment.

(iv)    Tenant shall have no right to sublet Tenant’s Generator Area or to assign its interest hereunder, other

than to an Affiliated Entity or Successor as defined in Section
13.7 of this Lease or to a transferee pursuant to an approved Transfer under Section 13 of this Lease.

applicable environmental and fire prevention laws, ordinances and regulations in Tenant’s use of Tenant’s Generator Area.

(v)    In addition to and without limiting Tenant’s obligations under the Lease, Tenant shall comply with all

(vi)    In addition to and without limiting Tenant’s obligations under the Lease, Tenant covenants and agrees
that Tenant’s use of Tenant’s Generator and Installations shall not adversely affect the insurance coverage for the Building. If for
any reason, the use of Tenant’s Generator and/or the installation or use of the Installations shall result in an increase in the amount
of the premiums for such coverage, then Tenant shall be liable for the full amount of any such increase.

Installations.

(vii)        Tenant  shall,  at  Tenant’s  sole  cost  and  expense,  repair  and  maintain  Tenant’s  Generator  and

(viii)    In addition to and without limiting the insurance provisions of the Lease, Tenant shall procure, keep
in force and pay for Commercial General Liability Insurance in respect of Tenant’s Generator Area satisfying the requirements of
Section 14.1 of the Lease.

Generator Area shall be at the sole risk of Tenant.

(ix)        To  the  maximum  extent  permitted  by  Law,  Tenant’s  Generator  and  all  Installations  in  Tenant’s

(x)    In addition to and without limiting the indemnification provisions set forth in the Lease, Tenant shall,
to the maximum extent permitted by law and subject to Section 14.5, indemnify, defend, and hold Landlord harmless from any and
all claims, losses, demands, actions, or causes of actions suffered by any person, firm, corporation, or other entity arising from
Tenant’s  use  of  Tenant’s  Generator  Area,  except  to  the  extent  caused  by  the  negligent  acts,  negligent  omissions  or  willful
misconduct of Landlord or any Landlord Parties.

(d)    Penthouse Equipment Premises. During the Term, Tenant shall have the right to use a portion of the Penthouse
of the Building designated by Landlord (the “Penthouse Equipment Premises”), as shown on Exhibit 1D, for the installation of
certain equipment approved by Landlord and purchased and installed by Tenant in accordance with the terms of this Lease (any
equipment installed within the Penthouse Equipment Premises, as the same may be modified, altered or replaced during the Term,
is  collectively  referred  to  herein  as  “Tenant’s  Penthouse  Equipment”),  including,  without  limitation,  Section  11  hereof.
Landlord’s approval of such equipment shall not be unreasonably withheld, conditioned or delayed provided Tenant demonstrates
to Landlord’s reasonable satisfaction that the proposed equipment (i) does not interfere with any base building equipment operated
by Landlord in the Penthouse; (ii) will not affect the structural integrity of the Building or impact the roof or the roof membrane in
any  manner;  and  (iii)  shall  be  adequately  sound-proofed  to  meet  all  requirements  of  Legal  Requirements  and  Landlord’s
reasonable  specified  maximum  decibel  levels  for  equipment  operations  that  is  communicated  to  Tenant  in  advance  of  the
installation of Tenant’s Penthouse Equipment. Tenant shall not install or operate Tenant’s Penthouse Equipment until Tenant has
obtained  and  submitted  to  Landlord  copies  of  all  required  governmental  permits,  licenses,  and  authorizations  necessary  for  the
installation  and  operation  thereof.  In  addition,  Tenant  shall  comply  with  all  reasonable  construction  rules  and  regulations
promulgated  by  Landlord  in  connection  with  the  installation,  maintenance  and  operation  of  Tenant’s  Penthouse  Equipment.
Landlord  shall  have  no  obligation  to  provide  any  services  including,  without  limitation,  electric  current  or  gas  service,  to  the
Penthouse Equipment Premises or to Tenant’s Penthouse Equipment; provided however, Tenant shall be permitted to connect to
any such utilities and services as part of Tenant’s installation of Tenant’s Penthouse Equipment. Tenant shall be responsible for the
cost of repairing and maintaining Tenant’s Penthouse Equipment and the cost of repairing any damage to the Building, or the cost
of any necessary improvements to the Building, caused by or as a result of the installation, replacement and/or removal of Tenant’s
Penthouse Equipment. Landlord makes no warranties or representations to Tenant as to the suitability of the Penthouse Equipment
Premises  for  the  installation  and  operation  of  Tenant’s  Penthouse  Equipment.  In  the  event  that  at  any  time  during  the  Term,
Landlord determines, in its sole but bona fide business judgment, that the operation and/or periodic testing of Tenant’s Penthouse
Equipment interferes with the operation of the Building or the business operations of any of the occupants of the Building, then
Tenant shall, upon notice from Landlord, cause all further testing of Tenant’s Penthouse Equipment to occur after normal business
hours (hereinafter defined).

(e)        Cafeteria.  During  the  Term,  Tenant,  its  employees,  contractors,  and  visitors  shall  have  the  right  to  use  the
Cafeterias,  as  hereinafter  defined,  in  common  with  others  entitled  thereto.  The  “Cafeterias”  shall  be  defined  as  food  services
facilities which provide food to tenants and occupants of the Campus. As of the Execution Date: (i) one (1) Cafeteria is located in
Building 55 (the “Building 55 Cafeteria”), and (ii) the normal operating hours of the Building 55 Cafeteria are from 7:30 a.m. to
1:30 p.m., Monday through Friday, excepting holidays. As of the Term Commencement Date, one (1) additional Cafeteria will be
located in the Building and shall maintain normal operating hours no fewer than those maintained at the Building 55 Cafeteria.
The quality of operations of the Cafeterias shall be consistent with the quality of food service operations in other suburban office
buildings  in  the  Boston  area.  Tenant  hereby  acknowledges  that  the  Cafeterias  may  be  relocated,  from  time  to  time,  to  other
buildings located on the Campus. A third party provider is currently contemplated to operate the Cafeterias. Any amounts paid by
Landlord on account of the operation of the Cafeterias in excess of the net revenues derived from the

operation  of  the  Cafeterias  shall  be  included  in  Operating  Costs,  as  shall  all  of  Landlord’s  costs  of  cleaning,  maintaining,  and
repairing the Cafeterias. Card readers shall, at no cost to Tenant, be installed and maintained at appropriate access points to the
Cafeterias  and  identification  cards  shall  be  issued  to  authorized  users.  Landlord  will  cooperate  with  Tenant  to  permit  Tenant’s
employees to charge purchases from the Cafeterias to Tenant.

(f)        Fitness  Center.  During  the  Term,  Tenant,  its  employees  and  visitors  shall  have  the  right  to  use  the  Fitness
Center, as hereinafter defined, without charge, in common with others entitled thereto. The “Fitness Center” shall be a work-out
facility for the use of tenants and occupants of the Campus. As of the Execution Date, the Fitness Center is located in Building
65. Tenant acknowledges that the Fitness Center may be relocated, from time to time, to other buildings located on the Campus.
Card  readers  shall,  at  no  cost  to  Tenant,  be  installed  and  maintained  at  appropriate  access  points  to  the  Fitness  Center  and
identification  cards  shall  be  issued  to  authorized  users.  Users  of  the  fitness  center  shall  be  required  to  execute  such  liability
waivers as Landlord shall reasonably require. Any amounts paid by Landlord on account of the operation of the Fitness Center in
excess of any net revenues derived from the operation of the Fitness Center shall be included in Operating Costs, as shall all of
Landlord’s costs of cleaning, maintaining, and repairing the Fitness Center.

(g)        Bicycles.  Tenant  shall  have  the  right  to  use  in  common  with  others  a  bicycle  storage  room  to  be  installed  by

Landlord at its expense in the Building.

1.4

Tenant’s Access.

(a)    From and after the Term Commencement Date and until the end of the Term, Tenant shall have access to the
Premises  twenty-four  (24)  hours  a  day,  seven  (7)  days  a  week,  subject  to  Legal  Requirements,  the  Rules  and  Regulations,  the
terms of this Lease and matters of record.

(b)    Tenant and its employees shall have access to the Building after normal business hours by means of a card
reader  access  system.  In  addition  to  the  foregoing,  Tenant  shall  have  the  right,  subject  to  Tenant’s  obtaining  Landlord’s  prior
written  approval  of  Tenant’s  plans  and  specifications  therefor  (which  approval  shall  not  be  unreasonably  withheld,  delayed  or
conditioned),  to  install  a  security  system  within  the  Premises  (“Tenant’s  Security  System  Work”).  Tenant’s  Security  System
Work  shall  be  performed  in  accordance  with  this  Lease,  including,  without  limitation,  Section  11  hereof.  Tenant  shall  provide
Landlord and the cleaning personnel with access cards permitting normal entry to Tenant’s Premises. In addition to the foregoing,
such  security  system  shall  be  designed  with  a  master  key  override  using  the  Building  master  key,  so  that  Landlord  shall  have
access to the Premises in an emergency, but Landlord shall only use such master key access in an emergency. Additionally, Tenant
shall ensure that such system shall comply with all applicable laws, rules and regulations, including all fire safety laws, and in no
event  shall  Landlord  be  liable  for,  and  Tenant  shall  defend,  indemnify,  and  hold  harmless  Landlord  and  its  representatives  and
agents from and against, any claims, demands, liabilities, causes of action, suits, judgments, damages and expenses arising from
such system or the malfunctioning thereof in accordance with Tenant’s indemnity obligations set forth in Section 14.2.

(c)    Subject to Section 11, Tenant shall have the right to access the Premises, at Tenant’s sole risk, at least thirty
(30) days before the Term Commencement Date for purposes reasonably related to the installation of Tenant’s Work (as defined in
Exhibit  4),  provided  such  access  does  not  materially  interfere  with  the  preparation  for  or  performance  of  Landlord’s  Work
(hereinafter defined). Tenant shall, prior to the first entry to the Premises pursuant to this Section 1.4(c), provide Landlord with
certificates of insurance evidencing that the insurance required in Section 14 hereof is in full force and effect and covering any
person or entity entering the Building. Tenant shall defend, indemnify and hold the Landlord Parties (hereinafter defined) harmless
from and against any and all Claims (hereinafter defined) for injury to persons or property resulting from or relating to Tenant’s
access  to  and  use  of  the  Premises  prior  to  the  Term  Commencement  Date  as  provided  under  this  Section  1.4(c).  Tenant  shall
coordinate any access to the Premises prior to the Term Commencement Date with Landlord’s property manager. If the exercise of
Tenant’s rights under this Section 1.4(c) results in a delay to Landlord’s Work, the same shall constitute Tenant Delay (as that term
is defined in Section 3.2(c)).

1.5    No recording // Notice of Lease. Neither party shall record this Lease. Tenant shall not record a memorandum of this
Lease and/or a notice of this Lease. Notwithstanding the foregoing, if the Initial Term plus any Extension Term(s) exceed in the
aggregate seven (7) years, Landlord agrees to join in the execution, in recordable form, of a statutory notice of lease and/or written
declaration in which shall be stated the Term Commencement Date, the Rent Commencement Date, the number and length of the
Extension Term(s) and the Expiration Date, which notice of lease may be recorded by Tenant with the Middlesex South Registry
of Deeds and/or filed with the Middlesex South Registry District of the Land Court, as appropriate (alternatively and collectively,
the  “Registry”)  at  Tenant’s  sole  cost  and  expense.  If  a  notice  of  lease  was  previously  recorded  with  the  Registry,  upon  the
expiration or earlier termination of this Lease, Landlord shall deliver to Tenant a notice of termination of Lease and Tenant shall
promptly  execute,  acknowledge,  and  deliver  the  same  (together  with  any  other  instrument(s)  that  may  be  necessary  in  order  to
record  and/or  file  same  with  the  Registry)  to  Landlord  for  Landlord’s  execution  and  recordation  with  the  Registry,  which
obligation shall survive the expiration or earlier termination of the Lease.

1.6    Exclusions. The following are expressly excluded from the Premises and reserved to Landlord: all the perimeter walls
of  the  Premises  (except  the  inner  surfaces  thereof),  the  Common  Areas,  and  any  space  in  or  adjacent  to  the  Premises  used  for
shafts, stacks, pipes, conduits, wires and appurtenant fixtures, fan rooms, ducts, electric or other utilities, sinks or other Building
facilities, and the use of all of the foregoing, except as expressly permitted pursuant to Section 1.3(a) above.

1.7

Acid Neutralization Tank.

(a)        Tenant  shall  have  the  right,  at  any  time  during  the  Term,  to  install  a  separate  acid  neutralization  tank
(“Tenant’s Acid Neutralization Tank”) within the PH System Room for Tenant’s exclusive use in accordance with the provisions
of this Lease, including, without limitation, Section 11 hereof. In such event, Tenant shall have the right, throughout the Term of
the Lease, as the same may be extended, to use Tenant’s Acid Neutralization Tank in accordance with Legal Requirements. Tenant
shall obtain, and maintain, all governmental permits and approvals necessary for the operation and maintenance of Tenant’s Acid
Neutralization Tank.

Tenant shall be responsible for all costs, charges and expenses incurred from time to time in connection with or arising out of the
operation, use, maintenance, repair or refurbishment of Tenant’s Acid Neutralization Tank, including all clean-up costs relating to
Tenant’s Acid Neutralization Tank.

(b)    In the event Tenant installs Tenant’s Acid Neutralization Tank as provided herein, Tenant shall be responsible
for assuring that the maintenance and operation of Tenant’s Acid Neutralization Tank shall in no way damage any portion of the
Building or Property. To the maximum extent permitted by Law, Tenant’s Acid Neutralization Tank and all appurtenances thereto
shall  be  at  the  sole  risk  of  Tenant,  and  Landlord  shall  have  no  liability  to  Tenant  if  Tenant’s  Acid  Neutralization  Tank  or  any
appurtenant installations are damaged for any reason following the delivery of Tenant’s Acid Neutralization Tank by Landlord in
good working order and repair. Except for Landlord’s or any Landlord Parties’ negligence or willful misconduct, Tenant agrees to
be responsible for any damage caused to the Building or Property in connection with the maintenance and operation of Tenant’s
Acid Neutralization Tank. Except (subject to Section 14.5) with respect to Claims, to the extent caused by the negligence or willful
misconduct  of  Landlord  or  any  Landlord  Parties,  Tenant  shall  indemnify,  save,  defend  (at  Landlord’s  option  and  with  counsel
reasonably acceptable to Landlord) and hold the Landlord Parties, as hereinafter defined, harmless from and against any and all
Claims (as hereinafter defined), including (i) diminution in value of the Premises or any portion thereof, (ii) damages for the loss
of or restriction on use of rentable or usable space of the Premises, (iii) damages arising from any adverse impact on marketing of
space in the Premises or any portion thereof, and (iv) sums paid in settlement of Claims that arise during or after the Term as a
result  of  Tenant’s  improper  use  of  Tenant’s  Acid  Neutralization  Tank  in  violation  of  applicable  Legal  Requirements.  This
indemnification by Tenant includes costs actually incurred by Landlord: (1) in connection with any investigation required by any
Governmental Authority of site conditions to the extent resulting from the breach by Tenant of its obligations with respect to the
Acid Neutralization Tank, (2) in connection with any investigation required by Landlord pursuant to which it is determined that
Tenant  has  breach  its  obligations  with  respect  to  Tenant’s  Acid  Neutralization  Tank,  and  (3)  any  clean-up,  remediation,  and/or
removal  of  any  Hazardous  Materials  and/or  restoration  of  the  Property  required  by  any  Governmental  Authority  caused  by
Tenant’s improper use of Tenant’s Acid Neutralization Tank.

(c)    If Tenant elects to install Tenant’s Acid Neutralization Tank as set forth in this Section 1.7, Tenant shall be
responsible  for  the  installation,  operation,  cleanliness,  maintenance  and  removal  of  Tenant’s  Acid  Neutralization  Tank  and  the
appurtenances, all of which shall remain the personal property of Tenant, and shall be removed by Tenant at its own expense at the
expiration or earlier termination of the Lease. Tenant shall repair any damage caused by such removal, including the patching of
any  holes  to  match,  as  closely  as  possible,  the  color  surrounding  the  area  where  Tenant’s  Acid  Neutralization  Tank  and
appurtenances  were  attached.  Such  maintenance  and  operation  shall  be  performed  in  a  manner  to  avoid  any  unreasonable
interference  with  any  other  tenants  or  Landlord.  Tenant  shall  take  Tenant’s  Acid  Neutralization  Tank  Premises  “as  is”  in  the
condition in which the PH System Premises is in as of the Commencement Date, without any obligation on the part of Landlord to
prepare or construct the PH System Premises for Tenant’s use or occupancy. Without limiting the foregoing, Landlord makes no
warranties  or  representations  to  Tenant  as  to  the  suitability  of  the  PH  System  Premises  for  the  installation  and  operation  of
Tenant’s Acid Neutralization Tank. Tenant shall have no right

to  make  any  changes,  alterations,  additions,  decorations  or  other  improvements  to  the  PH  System  Premises  without  Landlord’s
prior written consent which shall not be unreasonably withheld, conditioned or delayed. Tenant agrees to maintain Tenant’s Acid
Neutralization Tank in good condition and repair.

(d)    Landlord shall have no obligation to provide any services, including, without limitation, electric current, to

Tenant’s Acid Neutralization Tank.

(e)    Tenant’s Surrender Plan, as required pursuant to Section 21.2, shall include the decommissioning and removal

of Tenant’s Acid Neutralization Tank in accordance with applicable Law.

2.

RIGHTS RESERVED TO LANDLORD

2.1    Additions and Alterations. Landlord reserves the right, at any time and from time to time, to make such changes,
alterations, additions, improvements, repairs or replacements in or to the Property (including the Premises but, with respect to the
Premises,  only  for  purposes  of  repairs,  maintenance,  replacements  and  the  exercise  of  any  other  rights  expressly  reserved  to
Landlord herein) and the fixtures and equipment therein, as well as in or to the street entrances and/or the Common Areas, as it
may  deem  necessary  or  desirable,  provided,  however,  that  there  be  no  material  obstruction  of  permanent  access  to,  or  material
interference with the use and enjoyment of, the Premises by Tenant or any material diminution of the quality of the Premises or
Property as first class office and laboratory space. Subject to the foregoing, Landlord expressly reserves the right to temporarily
close all, or any portion, of the Common Areas for the purpose of making repairs or changes hereto; provided however, Landlord
will take reasonable steps to minimize the extent to which any repairs or alterations to the Common Areas disrupt the use of such
Common Areas.

2.2

Additions to the Property.

(a)        Landlord  may  at  any  time  or  from  time  to  time  (i)  construct  additional  building(s)  and  improvements  and
related site improvements (collectively, “Future Development”) in all or any part of the Property and/or (ii) change the location
or arrangement of any improvement outside the Building in or on the Property or all or any part of the Common Areas, or add or
deduct  any  land  to  or  from  the  Property;  provided  that  there  shall  be  no  material  increase  in  Tenant’s  obligations  or  material
interference with Tenant’s rights under this Lease or material diminution of the quality of the Property as a first class office and
laboratory space in connection with the exercise of the foregoing reserved rights.

(b)    Tenant acknowledges and agrees that this Lease is subject and subordinate to (i) The Hayden Science Center
Condominium (the “Condominium”), which was established by Master Deed dated December 1, 2017, recorded in Book 70325,
Page 108, in the Middlesex South District Registry of Deeds and filed as Document No. 195793 in the Middlesex South Registry
District of the Land Court, (ii) the Condominium Floor Plans and Site Plans dated December 1, 2017, and filed with the Middlesex
Registry  of  Deeds,  Southern  District,  as  Plan  No.  1090,  Pages  1  through  13,  and  (iii)  the  Declaration  of  Trust  of  The  Hayden
Science Center Condominium Trust dated December 1, 2017, recorded in Book 70325, Page 148, in the Middlesex

South District Registry of Deeds and filed as Document No. 195794 in the Middlesex South Registry District of the Land Court
(the Master Deed, Declaration of Trust, and the Plans are being referred to herein as the “Condominium Documents”).  Tenant
acknowledges and confirms  that,  as  of the  date  hereof,  the  Building  is  not  yet a Unit of the Condominium, provided, however,
Landlord may amend the Master Deed to submit the Building to the provisions of Chapter 183A of the Massachusetts General
Laws and to include the Building as a Unit of the Condominium. Tenant further agrees that the Condominium Documents, as so
amended, may be further amended and that this Lease shall remain subject to and subordinate to the Condominium Documents, as
so  amended,  so  long  as  such  amendments  do  not:  not:  (x)  materially  adversely  affect  Tenant’s  rights  under  this  Lease,  or  (y)
materially increase Tenant’s obligations under this Lease. Landlord agrees to provide Tenant with copies of any such amendments
at least ten (10) business days prior to recording same.

(c)    Landlord and Tenant each hereby acknowledges and agrees that, in connection with any Future Development,
(i) Landlord shall have the right to enter into, and subject the Property to the terms and conditions of, a commercially reasonable
reciprocal easement agreement with any one or more of the neighboring property owners in order to create a commercial campus-
like setting (“REA”) provided that such REA does not (A) materially adversely affect Tenant’s use of, or access to, the Premises,
or (B) materially adversely affect the operation of Tenant’s business from the Premises in accordance with the terms of this Lease,
or Tenant’s rights under and pursuant to the terms of this Lease, including without limitation Tenant’s rights with respect to the
Common Areas, or (C) result in any increase in Tenant’s obligations under this Lease in more than a de minimus manner, or (D)
materially  diminish  the  quality  of  the  Property  as  a  first  class  office  and  laboratory  space;  (ii)  upon  Landlord’s  request  in
connection with the recording of the REA, Tenant shall execute a commercially reasonable instrument in recordable form making
this  Lease  subject  and  subordinate  to  the  REA;  (iii)  Landlord  shall  have  the  right  to  subdivide  the  Property  so  long  as  Tenant
continues to have all of the rights and obligations contained in this Lease (e.g., the appurtenant right to use all Common Areas);
and (iv) Tenant shall execute such reasonable documents (which may be in recordable form) evidencing the foregoing promptly
upon Landlord’s request.

(d)    In case any excavation shall be made for building or improvements or for any other purpose upon the land
adjacent to or near the Premises, Tenant will afford without charge to Landlord, or the person or persons, firms or corporations
causing or making such excavation, license to enter upon the Premises for the purpose of doing such work as Landlord or such
person or persons, firms or corporation shall deem to be necessary to preserve the walls or structures of the Building from injury,
and to protect the Building by proper securing of foundations.

2.3    Name and Address of Building. Landlord reserves the right at any time and from time to time to change the name or
address of the Building and/or the Property, provided Landlord gives Tenant at least three (3) months’ prior written notice thereof
and compensates Tenant for its reasonable, out of pocket cost of implementing such changes (e.g., replacement of letterhead and
business cards).

2.4

Landlord’s Access.

(a)    Subject to the terms hereof, Tenant shall (a) upon reasonable advance notice, which may be oral (except that
no notice shall be required in emergency situations), permit Landlord and any holder of a Mortgage (hereinafter defined) (each
such  holder,  a  “Mortgagee”),  and  the  agents,  representatives,  employees  and  contractors  of  each  of  them,  to  have  reasonable
access to the Premises at all reasonable hours for the purposes of inspection, making repairs, replacements or improvements in or
to the Premises or the Building or equipment therein (including, without limitation, sanitary, electrical, heating, air conditioning or
other systems), complying with all applicable laws, ordinances, rules, regulations, statutes, by-laws, court decisions and orders and
requirements of all public authorities (collectively, “Legal Requirements”),  or  exercising  any  right  reserved  to  Landlord  under
this Lease (including without limitation the right to take upon or through, or to keep and store within the Premises all necessary
materials, tools and equipment); (b) permit Landlord and its agents and employees, at reasonable times, upon reasonable advance
notice,  to  show  the  Premises  during  normal  business  hours  (i.e.  Monday  –  Friday  8  A.M.  -  6  P.M.,  Saturday  8  A.M.  –  1  P.M.,
excluding holidays (i.e. New Year’s Day, Memorial Day, Independence Day, Labor Day, Thanksgiving Day and Christmas Day))
to any prospective Mortgagee or purchaser of the Building and/or the Property or of the interest of Landlord therein, and, during
the last nine (9) months of the Term or at any time after the occurrence of an Event of Default, prospective tenants; and (c) upon
reasonable  prior  written  notice  from  Landlord,  permit  Landlord  and  its  agents,  at  Landlord’s  sole  cost  and  expense,  to  perform
environmental  audits,  environmental  site  investigations  and  environmental  site  assessments  (“Site  Assessments”)  in,  on,  under
and  at  the  Premises  and  the  Land,  it  being  understood  that  Landlord  shall  repair  any  damage  arising  as  a  result  of  the  Site
Assessments,  and  such  Site  Assessments  may  include  both  above  and  below  the  ground  testing  and  such  other  tests  as  may  be
necessary or appropriate to conduct the Site Assessments. In addition, to the extent that it is necessary to enter the Premises in
order to access any area that serves any portion of the Building outside the Premises, then Tenant shall, upon as much advance
notice as is practical under the circumstances, and in any event at least twenty-four (24) hours’ prior written notice (except that no
notice shall be required in emergency situations), permit contractors engaged by other occupants of the Building to pass through
the  Premises  in  order  to  access  such  areas  but  only  if  accompanied  by  a  representative  of  Landlord.  The  parties  agree  and
acknowledge  that,  despite  reasonable  and  customary  precautions  (which  Landlord  agrees  it  shall  exercise),  any  property  or
equipment in the Premises of a delicate, fragile or vulnerable nature may nevertheless be damaged in the course of performing
Landlord’s  obligations.  Accordingly,  Tenant  shall  take  reasonable  protective  precautions  with  unusually  fragile,  vulnerable  or
sensitive property and equipment. Nothing contained herein shall affect Landlord’s liability for damage to Tenant’s Property at the
Premises as provided in Section 14.3 below.

2.5        Pipes,  Ducts  and  Conduits.  Tenant  shall  permit  Landlord  to  erect,  use,  maintain  and  relocate  pipes,  ducts  and
conduits in and through the Premises, provided the same do not materially reduce the floor area or materially adversely affect the
appearance thereof.

2.6        Minimize  Interference;  Tenant  Representative.  Except  in  the  event  of  an  emergency,  Landlord  shall  use
commercially  reasonable  efforts  to  minimize  any  interference  with  Tenant’s  business  operations  and  use  and  occupancy  of  the
Premises in connection with the exercise any of the foregoing rights under this Section 2. In addition, at any time that access to the
Premises is allowed under this Section 2 (other than access to the Premises in the event of an emergency or for Premises cleaning
and janitorial service), Tenant shall be permitted to have a

representative present at all times and, if Tenant deems it reasonably necessary, to require any individuals entering the Premises
under this Section 2 to sign confidentiality agreements obligating such individuals to maintain the confidence of any information
learned while in the Premises.

3.

CONDITION OF PREMISES; CONSTRUCTION.

3.1

Condition of Premises.

(a)    Subject to delays due to governmental regulation, unusual scarcity of or inability to obtain labor or materials,
labor difficulties, casualty or other causes reasonably beyond Landlord’s control (collectively “Landlord’s Force Majeure”) and
subject  to  Tenant  Delays  (as  defined  in  Section  3.2(c)),  Landlord,  at  Landlord’s  sole  cost  and  expense,  shall  perform  the
Landlord’s Work (consisting of the Tenant Improvement Work, Landlord’s Kitchen Work and the Base Building Work) as such
terms are defined in Exhibit 4. All such work shall be performed in accordance with the terms and conditions of Exhibit 4.

(b)    In the event that the Landlord’s Work contains any defect which (i) was not known to Tenant prior to the Term
Commencement Date, and (ii) could not have been discovered by Tenant undertaking reasonable inspections of the Property and
Premises prior to the Term Commencement Date (“Latent Defects”), Landlord shall remediate such Latent Defects at Landlord’s
sole  cost  and  expense  and  any  delays  due  to  the  remediation  of  any  such  Latent  Defects  shall  not  be  deemed  to  be  Landlord’s
Force Majeure or a Tenant Delay provided that Tenant gives Landlord written notice of any such Latent Defect not later than one
(1) year after the date of Substantial Completion of the applicable portion of Landlord’s Work.

3.2

Landlord’s Work.

(a)    Subject to Landlord’s Force Majeure, and subject to any Tenant Delay (as hereinafter defined), Landlord, at
Landlord’s  sole  cost  and  expense,  shall  perform  the  Landlord’s  Work  (including  the  Base  Building  Work).  All  such  work  shall  be
performed in accordance with the terms and conditions of Exhibit 4.

(b)    It is anticipated that the Base Building Work and Tenant Improvement Work shall be Substantially Complete
on  or  before  the  Estimated  Term  Commencement  Date.  If  the  Base  Building  Work  and  Tenant  Improvement  Work  are  not
Substantially Complete by November 15, 2020 due to reasons other than a Tenant Delay or Landlord’s Force Majeure, then Tenant
shall  be  entitled  to  a  credit  equal  to  the  sum  of  the  product  of  Nine  Thousand  Nine  Hundred  Eighty-  Nine  and  81/100  Dollars
($9,989.81)  multiplied  by  the  number  of  days  that  elapse  after  November  15,  2020  until  the  Base  Building  Work  and  Tenant
Improvement  Work  are  Substantially  Compete.  Any  such  credit  granted  to  Tenant  pursuant  to  the  foregoing  sentence  shall  be
applied against the Base Rent otherwise owed by Tenant immediately following the Rent Commencement Date such that Tenant
shall not owe any payments of Base Rent to Landlord until such credit is exhausted. The foregoing shall constitute Tenant’s sole
and  exclusive  remedy  in  the  event  of  a  delay  in  the  occurrence  of  the  Term  Commencement  Date  beyond  the  Estimated  Term
Commencement Date.

(c)

Definitions.

(i)        “Tenant  Delay”  shall  mean  any  act  or  omission  by  Tenant  and/or  Tenant’s  agents,  employees  or
contractors (collectively with Tenant, the “Tenant Parties”) which causes an actual delay in the performance of Landlord’s Work.
Notwithstanding the foregoing, except where a Tenant Delay arises from Tenant’s failure timely to act within on or before a date
or time period expressly set forth in the Lease (in which event no Tenant Delay Notice shall be required): (x) in no event shall any
act or omission be deemed to be a Tenant Delay until and unless Landlord has given Tenant written notice (the “Tenant  Delay
Notice”) advising Tenant (a) that a Tenant Delay is occurring, and (b) of the basis on which Landlord has determined that a Tenant
Delay is occurring, and (y) no period of time prior to the time that Tenant receives a Tenant Delay Notice shall be included in the
period  of  time  charged  to  Tenant  pursuant  to  such  Tenant  Delay  Notice.  Once  Landlord’s  Contribution  has  been  fully  utilized,
Tenant shall be pay for any increase in the cost to Landlord in the performance of Landlord’s Work arising from any Tenant Delay
within thirty (30) days of billing by Landlord.

(ii)    “Substantially Complete” or “Substantial Completion,” when referring to the Base Building Work
and Tenant Improvement Work shall mean that: (1) the Base Building Work and Tenant Improvement Work are completed, other
than minor work which does not materially affect Tenant’s use of, or access to, the Premises, (2) the Premises and those portions
of  the  Common  Areas  of  the  Building  which  affect  Tenant’s  occupancy  are  in  conformance  with  all  applicable  building  codes,
permits, laws and regulations, including without limitation, ADA,
(3) the Building amenities (including, without limitation, the Building Cafeteria, the lobby, library and locker room/showers), the
Fitness  Center  and  Garage  shall  be  operational,  (4)  all  structural  elements  and  subsystems  of  the  Building,  including  but  not
limited to HVAC, mechanical, electrical, lighting, plumbing, and life safety systems, will be in good working condition and repair,
(5)  Landlord  has  delivered  to  Tenant  a  certificate  of  substantial  completion  from  Landlord’s  architect  stating  that  the  Base
Building  Work  and  Tenant  Improvement  Work  are  substantially  complete,  and  (6)  such  evidence  (the  “Town Approval”)  as  is
customarily provided by the Town of Lexington to evidence its acceptance of the Base Building Work and Tenant Improvement
Work  and  Tenant’s  right  to  lawfully  occupy  the  Premises  (e.g.,  sign-offs  on  the  Building  permit  by  all  applicable  Town  of
Lexington departments or a certificate of occupancy, which may be a temporary certificate of occupancy) has been provided by the
Town of Lexington; provided, however, that Substantial Completion shall be deemed to have occurred for purposes of clause (5) if
(x) such required sign-offs are completed with respect to the Base Building Work and Tenant Improvement Work but cannot be
completed for the entire Premises due to Tenant’s failure to complete installation or work to be performed by Tenant (including
furniture, wiring and cabling) in a manner that allows such required inspections to be completed and a temporary certificate of
occupancy to be issued, or (y) approval of applicable governmental authorities required to permit legal occupancy of the Premises
for the Permitted Uses cannot be obtained for the entire Premises due to Tenant’s failure to complete installation of installation or
work to be performed by Tenant (including furniture, wiring and cabling) in a manner that allows such approval to be obtained. No
costs  incurred  by  Landlord  in  satisfying  the  definition  of  Substantial  Completion  shall  be  included  in  Operating  Costs.
Notwithstanding anything to the contrary herein contained, in the event that the Base Building Work or Tenant Improvement Work
is delayed beyond the Estimated Term Commencement Date by reason of any Tenant Delay, then Tenant shall be responsible to
pay  Rent  for  each  day  that  Landlord  would  have  achieved  Substantial  Completion  of  the  Base  Building  Work  or  Tenant
Improvement Work, as applicable, but for such Tenant Delay, notwithstanding that the Term Commencement Date may not yet
have occurred.

(iii)    “Substantially Complete” or “Substantial Completion,” when referring to the Landlord’s Kitchen
Work  shall  mean  that:  (1)  the  Landlord’s  Kitchen  Work  is  completed,  other  than  minor  work  which  does  not  materially  affect
Tenant’s use of, or access to, such portion of the Premises as a commissary kitchen for in-house food preparation for service to
Tenant’s  employees;  (2)  the  Landlord’s  Kitchen  Work  is  in  conformance  with  all  applicable  building  codes,  permits,  laws  and
regulations, including without limitation, ADA, (3) Landlord has delivered to Tenant a certificate of substantial completion from
Landlord’s architect stating that the Landlord’s Kitchen Work is substantially complete, and (4) Town Approval has been provided
by the Town of Lexington with respect to the Landlord’s Kitchen Work. No costs incurred by Landlord in satisfying the definition
of Substantial Completion shall be included in Operating Costs.

(iv)    Punchlist. Promptly following delivery of the Premises to Tenant with the Base Building Work and
Tenant Improvement Work, respectively, substantially complete, Landlord shall provide Tenant with a list (each, a “Punchlist”) of
outstanding items (in each case, the “Punchlist Items”) which (a) need to be performed to complete the Base Building Work and
Tenant Improvement Work, respectively, and (b) do not materially impair Tenant’s ability to use the Premises for the Permitted
Use.  Promptly  following  Substantial  Completion  of  the  Landlord’s  Kitchen  Work,  Landlord  shall  provide  Tenant  with  a  list
Punchlist Items with respect to Landlord’s Kitchen Work. Subject to Landlord’s Force Majeure and Tenant Delays, Landlord shall,
unless otherwise specified on the Punchlist, complete all Punchlist Items within forty-five (45) days of the date of the Punchlist.

4.

USE OF PREMISES

4.1        Permitted  Uses.  During  the  Term,  Tenant  shall  use  the  Premises  only  for  the  Permitted  Uses  and  for  no  other
purposes. Service and utility areas (whether or not a part of the Premises) shall be used only for the particular purpose for which
they are designed. Tenant shall keep the Premises equipped with appropriate safety appliances to the extent required by applicable
laws or insurance requirements.

4.2

Prohibited Uses.

(a)    Notwithstanding any other provision of this Lease, Tenant shall not use the Premises or the Building, or any
part  thereof,  or  suffer  or  permit  the  use  or  occupancy  of  the  Premises  or  the  Building  or  any  part  thereof  by  any  of  the  Tenant
Parties (i) in a manner which would violate any of the covenants, agreements, terms, provisions and conditions of this Lease or
otherwise applicable to or binding upon the Premises; (ii) for any unlawful purposes or in any unlawful manner; (iii) which, in the
reasonable  judgment  of  Landlord  (taking  into  account  the  use  of  the  Building  as  a  combination  laboratory,  research  and
development and office building and the Permitted Uses) shall (a) impair the appearance or reputation of the Building; (b) impair,
interfere  with  or  otherwise  diminish  the  quality  of  any  of  the  Building  services  or  the  proper  and  economic  heating,  cleaning,
ventilating, air conditioning or other servicing of the Building or Premises, or the use or occupancy of any of the Common Areas;
(c) occasion discomfort, inconvenience or annoyance in any material respect (and Tenant shall not install or use any electrical or
other equipment of any kind (including, without limitation, Tenant’s Rooftop Equipment) which, in the reasonable judgment of
Landlord, will cause any such impairment, interference, discomfort,

inconvenience, annoyance or injury), or cause any injury or damage to any occupants of the Premises or other tenants or occupants
of  the  Building  or  their  property;  or  (d)  cause  harmful  air  emissions,  laboratory  odors  or  noises  or  any  unusual  or  other
objectionable odors, noises or emissions to emanate from the Premises; (iv) in a manner which is inconsistent with the operation
and/or maintenance of the Building as a first-class combination office, research, development and laboratory facility; or (v) in a
manner which shall increase such insurance rates on the Building or on property located therein over that applicable when Tenant
first took occupancy of the Premises hereunder.

(b)    With respect to the use and occupancy of the Premises and the Common Areas, Tenant will not: (i) place or
maintain  any  signage  (except  as  set  forth  in  Section  12.2  below),  trash,  refuse  or  other  articles  in  any  vestibule  or  entry  of  the
Premises, on the footwalks or corridors adjacent thereto or elsewhere on the exterior of the Premises, nor obstruct any driveway,
corridor,  footwalk,  parking  area,  mall  or  any  other  Common  Areas;  (ii)  permit  undue  accumulations  of  or  burn  garbage,  trash,
rubbish or other refuse within or without the Premises;
(iii)  permit  the  parking  of  vehicles  so  as  to  interfere  with  the  use  of  any  driveway,  corridor,  footwalk,  parking  area,  or  other
Common Areas; (iv) receive or ship articles of any kind outside of those areas reasonably designated by Landlord; (v) conduct or
permit to be conducted any auction, going out of business sale, bankruptcy sale (unless directed by court order), or other similar
type  sale  in  or  connected  with  the  Premises;  (vi)  use  the  name  of  Landlord,  or  any  of  Landlord’s  affiliates  in  any  publicity,
promotion, trailer, press release, advertising, printed, or display materials without Landlord’s prior written consent; or (vii) except
in connection with Alterations (hereinafter defined) approved by Landlord, cause or permit any hole to be drilled or made in any
part of the Building.

4.3    Transportation of Animals. No animals, animal waste, food or supplies relating to the animals maintained from time
to  time  in  the  animal  storage  areas  of  the  Premises  shall  be  transported  within  the  Building  unless  Tenant  elects  to  install  a
vivarium,  which  installation  shall  be  in  accordance  with  all  applicable  provisions  of  this  Lease  (including  without  limitation
Sections
4.6 and 11), and in such event, only as provided in this Section 4.3. All deliveries of animals or animal food or supplies to Tenant
at the Building shall be made prior to 11:00 a.m. No transportation of animals, animal waste, food or supplies within the Building
shall occur between the hours of 11:00 a.m. and 1:00 p.m. At all times that animals are transported within the Common Areas,
they shall be transported in an appropriate cage or other container. At no time shall any animals, animal waste, food or supplies
relating to the animals be brought into, transported through, or delivered to the lobby of the Building or be transported within the
Building in elevators other than the freight elevator.

4.4        Chemical  Safety  Program.  If  at  any  time  during  the  Term,  Tenant’s  use  of  the  Premises  includes  research,
development,  warehouse,  laboratory  use,  or  other  ancillary  uses  related  to  the  foregoing,  Tenant  shall  establish  and  maintain  a
chemical  safety  program  administered  by  a  qualified  individual  (who,  if  required  by  Applicable  Laws,  shall  be  licensed),in
accordance  with  the  requirements  of  the  Massachusetts  Water  Resources  Authority  (“MWRA”)  and  any  other  applicable
Governmental Authority. Tenant shall be solely responsible for all costs incurred in connection with such chemical safety program.
Upon request by Landlord no more than twice per calendar year, Tenant shall provide Landlord with a certificate signed by a duly
authorized representative of Tenant attesting to Tenant’s compliance with the requirements of (a)

the MWRA and any other applicable Governmental Authority with respect to such chemical safety program and (b) this Section.
Tenant shall obtain and maintain during the Term (i) any permit required by the MWRA (“MWRA Permit”) and (ii) a wastewater
treatment operator license from the Commonwealth of Massachusetts with respect to Tenant’s use of any acid neutralization tank
exclusively serving the Premises in the Building. Tenant shall not introduce anything into the acid neutralization tank serving the
Premises, if any (x) in violation of the terms of the MWRA Permit,
(y) in violation of Legal Requirements or (z) that would interfere with the proper functioning of any such acid neutralization tank.

4.5        Parking  and  Traffic  Demand  Management  Plan.  The  Property  is  subject  to  a  Parking  and  Traffic  Demand
Management Plan with the Town of Lexington, for Expanded Multi- Tenant Life Science Center, for 45,55, 65, and 75 Hayden
Avenue,  Lexington,  Massachusetts,  updated  December  6,  2017  (the  “Initial  PTDM”).  Tenant  agrees,  at  its  sole  expense,  to
comply with the requirements of the Initial PTDM, only insofar as they apply to the Premises and/or Tenant’s use and occupancy
thereof.  In  the  event  that  the  Initial  PTDM  is  ever  modified,  supplemented,  amended  or  replaced  (“PTDM  Modifications”),
Tenant agrees, at its sole expense, to comply with the requirements of the PTDM Modifications, only insofar as they apply to the
Premises and/or Tenant’s use and occupancy thereof.

4.6        Vivarium.  If  Tenant  desires  to  install  a  vivarium,  and  provided  that  Tenant,  at  its  sole  expense,  obtains  all
governmental  permits  and  approvals  required  therefor,  Tenant  shall  have  the  right  to  install  a  vivarium  in  the  Premises  in
accordance with the terms and conditions of Article 11 below. Tenant shall be responsible, at its sole expense, for the operations of
the vivarium in accordance with all Legal Requirements and with best industry practices. Without limiting the general application
of  the  foregoing,  Tenant  shall  separately  dispose  of  all  waste  products  from  the  operation  of  the  vivarium,  including,  without
limitation,  dead  animals,  strictly  in  accordance  with  Legal  Requirements.  Landlord  shall  have  the  right,  from  time  to  time  by
written  notice  to  Tenant,  to  promulgate  reasonable  rules  and  regulations  with  respect  to  the  operation  of  the  vivarium  so  as  to
minimize  any  adverse  effects  that  such  operation  may  have  on  other  occupants  of  the  Building,  including  without  limitation,
regulations as to noise mitigation.

5.

RENT; ADDITIONAL RENT

5.1    Base Rent. During the Term, commencing on the Rent Commencement Date, Tenant shall pay to Landlord Base Rent
in equal monthly installments, in advance and without demand on the first day of each month for and with respect to such month.
Unless otherwise expressly provided herein, the payment of additional rent and other charges reserved and covenanted to be paid
under  this  Lease  with  respect  to  the  Premises  (other  than  Base  Rent)  shall  commence  on  the  Term  Commencement  Date.  Base
Rent  and  additional  rent  hereunder  (collectively,  “Rent”)  shall  be  prorated  for  any  partial  months.  Rent  shall  be  payable  to
Landlord or, if Landlord shall so direct in writing, to Landlord’s agent or nominee, in lawful money of the United States which
shall be legal tender for payment of all debts and dues, public and private, at the time of payment.

5.2

Operating Costs.

(a)        “Operating  Costs”  shall  mean  all  reasonable  and  verifiable  costs  incurred  and  expenditures  of  whatever
nature  made  by  Landlord  in  the  operation,  management,  repair,  replacement,  maintenance  and  insurance  of  the  Property  or
allocated  to  the  Property,  including  without  limitation  all  costs  of  labor  (wages,  salaries,  fringe  benefits,  etc.)  of  individuals
directly  employed  in  the  management/operation  of  the  Property  up  to  and  including  the  Director  of  Property  Management,
however  denominated,  any  costs  for  utilities  supplied  to  exterior  areas  and  the  Common  Areas,  and  any  costs  for  repair  and
replacements, cleaning and maintenance of exterior areas and the Common Areas, related equipment, facilities and appurtenances
and  HVAC  equipment,  a  management  fee  in  the  amount  of  four  percent  (4%)  of  gross  Building  revenues  paid  to  Landlord’s
property manager (if not included in labor costs), the costs, including, without limitation, a commercially reasonable rental factor,
of Landlord’s management office for the Property, which management office may be located outside the Property and which may
serve  other  properties  in  addition  to  the  Property  (in  which  event  such  costs  shall  be  equitably  allocated  among  the  properties
served by such office), the cost of operating any amenities in the Property available to all tenants of the Property and any subsidy
provided by Landlord for or with respect to any such amenity, and all costs of applying and reporting for the Building or any part
thereof  to  seek  or  maintain  certification  under  the  U.S.  EPA’s  Energy  Star®  rating  system,  the  U.S.  Green  Building  Council’s
Leadership in Energy and Environmental Design (LEED) rating system or a similar system or standard. For costs and expenditures
made by Landlord in connection with the operation, management, repair, replacement, maintenance and insurance of the Building
as  a  whole,  Landlord  shall  make  a  reasonable  allocation  thereof  between  the  retail  and  non-retail  portions  of  the  Building,  if
applicable. The allocation of Operating Costs relating to the Common Areas of the Campus shall be made in accordance with the
Condominium Documents. Operating Costs shall not include Excluded Costs (hereinafter defined).

(b)    “Excluded Costs” shall be defined as (i) any mortgage charges (including interest, principal, points and fees);
(ii)  brokerage  commissions;  (iii)  salaries  of  executives  and  owners  not  directly  employed  in  the  management/operation  of  the
Property;  (iv)  the  cost  of  work  done  by  Landlord  for  a  particular  tenant;  (v)  the  cost  of  items  which,  by  generally  accepted
accounting  principles,  would  be  capitalized  on  the  books  of  Landlord  or  are  otherwise  not  properly  chargeable  against  income,
except to the extent such capital item is (A) required by any Legal Requirements or (B) reasonably projected to materially reduce
Operating  Costs;  if  such  capital  expenditures  arise,  the  cost  shall  be  amortized  over  the  useful  life  of  the  applicable  item,
determined in accordance with generally accepted accounting principles, as consistently applied in the real estate industry; (vi) the
costs of Landlord’s Work and any contributions made by Landlord to any tenant of the Property in connection with the build-out of
its premises; (vii) franchise or income taxes imposed on Landlord; (viii) costs paid directly by individual tenants to suppliers or
directly to Landlord, including tenant HVAC, electricity, telephone and other utility costs; (ix) increases in premiums for insurance
when such increase is caused by the use of the Building by Landlord or any other tenant of the Building; (x) depreciation of the
Building; (xi) costs relating to maintaining Landlord’s existence as a corporation, partnership or other entity;
(xii)  advertising  and  other  fees  and  costs  incurred  in  procuring  tenants;  (xiii)  the  cost  of  any  items  for  which  Landlord  is
reimbursed by insurance, condemnation awards, refund, rebate or otherwise, and any expenses for repairs or maintenance to the
extent covered by warranties, guaranties and service contracts; and (xiv) costs incurred in connection with any disputes between
Landlord and its employees, between Landlord and Building management, or between Landlord and other tenants or occupants;
(xv) Taxes; (xvi) except with respect to the management fee, any expenses

paid to Landlord or subsidiaries or affiliates of Landlord for goods and/or services in or to any portion of the Building to the extent
that  such  expense  exceeds  the  costs  of  such  goods  and/or  services  rendered  by  unaffiliated  third  parties  on  an  arm’s  length,
competitive  basis;  (xvii)  costs  related  to  events  for  the  Building  tenants  including,  but  not  limited  to  parties,  holiday  gifts  and
tenants welcoming gifts; or (xviii) costs arising from Landlord’s charitable or political contributions.

(c)    Payment of Operating Costs. Commencing as of the Term Commencement Date and continuing thereafter
throughout the remainder of the Term of the Lease, Tenant shall pay to Landlord, as additional rent, Tenant’s Share of Operating
Costs. Landlord may make a good faith estimate of Tenant’s Share of Operating Costs for any fiscal year or part thereof during the
Term,  and  Tenant  shall  pay  to  Landlord,  on  the  Term  Commencement  Date  and  on  the  first  (1st)  day  of  each  calendar  month
thereafter, an amount equal to Tenant’s Share of Operating Costs for such fiscal year and/or part thereof divided by the number of
months therein. Landlord may estimate and re-estimate Tenant’s Share of Operating Costs and deliver a copy of the estimate or re-
estimate to Tenant. Thereafter, the monthly installments of Tenant’s Share of Operating Costs shall be appropriately adjusted in
accordance with the estimations so that, by the end of the fiscal year in question, Tenant shall have paid all of Tenant’s Share of
Operating Costs as estimated by Landlord. Any amounts paid based on such an estimate shall be subject to adjustment as herein
provided when actual Operating Costs are available for each fiscal year. As of the Execution Date, the Property’s fiscal year is
January 1 – December 31.

(d)       Annual Reconciliation.  Landlord  shall,  within  one  hundred  twenty  (120)  days  after  the  end  of  each  fiscal
year, deliver to Tenant a reasonably detailed statement of the actual amount of Operating Costs for such fiscal year (“Year End
Statement”). Failure of Landlord to provide the Year End Statement within the time prescribed shall not relieve Tenant from its
obligations  hereunder.  If  the  total  of  such  monthly  remittances  on  account  of  any  fiscal  year  is  greater  than  Tenant’s  Share  of
Operating Costs actually incurred for such fiscal year, then, provided no Event of Default has occurred nor any event which, with
the passage of time and/or the giving of notice would constitute an Event of Default, Tenant may credit the difference against the
next installment of additional rent on account of Operating Costs due hereunder, except that if such difference is determined after
the end of the Term, Landlord shall refund such difference to Tenant within thirty (30) days after such determination to the extent
that such difference exceeds any amounts then due from Tenant to Landlord. If the total of such remittances is less than Tenant’s
Share  of  Operating  Costs  actually  incurred  for  such  fiscal  year,  Tenant  shall  pay  the  difference  to  Landlord,  as  additional  rent
hereunder,  within  ten  (10)  days  of  Tenant’s  receipt  of  an  invoice  therefor.  Landlord’s  estimate  of  Operating  Costs  for  the  next
fiscal  year  shall  be  based  upon  the  Operating  Costs  actually  incurred  for  the  prior  fiscal  year  as  reflected  in  the  Year-End
Statement plus a reasonable adjustment based upon estimated increases in Operating Costs. The provisions of this Section 5.2(d)
shall survive the expiration or earlier termination of this Lease.

(e)       Part Years. If the Term Commencement Date or the Expiration Date occurs in the middle of a fiscal year,
Tenant shall be liable for only that portion of the Operating Costs with respect to such fiscal year within the Term from and after
the Term Commencement Date.

(f)    Gross-Up. If, during any fiscal year, less than 95% of the Building is occupied by tenants or if Landlord was

not supplying all tenants with the services being supplied

to Tenant hereunder, actual Operating Costs incurred shall be reasonably extrapolated by Landlord on an item-by-item basis to the
reasonable  Operating  Costs  that  would  have  been  incurred  if  the  Building  was  95%  occupied  and  such  services  were  being
supplied to all tenants, and such extrapolated Operating Costs shall, for all purposes hereof, be deemed to be the Operating Costs
for such fiscal year. This “gross up” treatment shall be applied only with respect to variable Operating Costs arising from services
provided to Common Areas or to space in the Building being occupied by tenants (which services are not provided to vacant space
or may be provided only to some tenants) in order to allocate equitably such variable Operating Costs to the tenants receiving the
benefits thereof.

(g)    Audit Right. Provided there is no Event of Default nor any event which, with the passage of time and/or the
giving of notice would constitute an Event of Default, Tenant may, upon at least sixty (60) days’ prior written notice, inspect or
audit  Landlord’s  records  relating  to  Operating  Costs  for  any  periods  of  time  within  the  previous  fiscal  year  before  the  audit  or
inspection. However, no audit or inspection shall extend to periods of time before the Rent Commencement Date. If Tenant fails to
object  to  the  calculation  of  Tenant’s  Share  of  Operating  Costs  on  the  Year-End  Statement  within  sixty  (60)  days  after  such
statement has been delivered to Tenant and/or fails to complete any such audit or inspection within ninety (90) days after receipt of
the  Year  End  Statement,  then  Tenant  shall  be  deemed  to  have  waived  its  right  to  object  to  the  calculation  of  Tenant’s  Share  of
Operating Costs for the year in question and the calculation thereof as set forth on such statement shall be final. Tenant’s audit or
inspection  shall  be  conducted  only  at  Landlord’s  offices  or  the  offices  of  Landlord’s  property  manager  during  business  hours
reasonably designated by Landlord. Tenant shall pay the cost of such audit or inspection. Tenant may not conduct an inspection or
have an audit performed more than once during any fiscal year. If such inspection or audit reveals that an error was made in the
calculation of Tenant’s Share of Operating Costs previously charged to Tenant, then, provided there is no Event of Default nor an
event  which,  with  the  passage  of  time  and/or  the  giving  of  notice  would  constitute  an  Event  of  Default,  Tenant  may  credit  the
difference  against  the  next  installment  of  additional  rent  on  account  of  Operating  Costs  due  hereunder,  except  that  if  such
difference is determined after the end of the Term, Landlord shall refund such difference to Tenant within thirty (30) days after
such determination to the extent that such difference exceeds any amounts then due from Tenant to Landlord. If such inspection or
audit reveals an underpayment by Tenant, then Tenant shall pay to Landlord, as additional rent hereunder, any underpayment of
any such costs, as the case may be, within thirty (30) days after receipt of an invoice therefor. Tenant shall maintain the results of
any  such  audit  or  inspection  confidential  and  shall  not  be  permitted  to  use  any  third  party  to  perform  such  audit  or  inspection,
other than an independent firm of certified public accountants or a commercial real estate audit firm with at least ten (10) years of
experience  (A)  reasonably  acceptable  to  Landlord,  (B)  which  is  not  compensated  on  a  contingency  fee  basis  or  in  any  other
manner  which  is  dependent  upon  the  results  of  such  audit  or  inspection,  and  (C)  which  executes  Landlord’s  standard
confidentiality agreement whereby it shall agree to maintain the results of such audit or inspection confidential. The provisions of
this Section 5.2(g) shall survive the expiration or earlier termination of this Lease.

5.3

Taxes.

(a)    “Taxes” shall mean the real estate taxes and other taxes, levies and assessments imposed upon the Unit of the

Condominium in which the Building and the Land are

located (the “Unit”) and upon any personal property of Landlord used in the operation thereof, or on Landlord’s interest therein or
such personal property; charges, fees and assessments for transit, housing, police, fire or other services or purported benefits to the
Building and the Land (including without limitation any community preservation assessments); service or user payments in lieu of
taxes; and any and all other taxes, levies, betterments, assessments and charges arising from the ownership, leasing, operation, use
or occupancy of the Building and the Land or based upon rentals derived therefrom, which are or shall be imposed by federal,
state,  county,  municipal  or  other  governmental  authorities.  Taxes  shall  not  include  any  inheritance,  estate,  succession,  gift,
franchise, rental, income or profit tax, capital stock tax, capital levy or excise, or any income taxes arising out of or related to the
ownership  and  operation  of  the  Unit,  provided,  however,  that  any  of  the  same  and  any  other  tax,  excise,  fee,  levy,  charge  or
assessment, however described, that may in the future be levied or assessed as a substitute for or an addition to, in whole or in part,
any tax, levy or assessment which would otherwise constitute Taxes, whether or not now customary or in the contemplation of the
parties on the Execution Date of this Lease, shall constitute Taxes, but only to the extent calculated as if the Unit were the only
real estate owned by Landlord. “Taxes” shall also include reasonable expenses (including without limitation legal and consultant
fees) of tax abatement or other proceedings contesting assessments or levies.

Prior to the fiscal year  in  which  the  Unit  has  been  created  and  assessed  (the  “Applicable Fiscal Year”),  Landlord  shall
allocate  Taxes  which  are  incurred  with  respect  to  the  Common  Areas  of  the  Campus  on  a  reasonable  basis.  From  and  after
substantial completion of any occupiable improvements constructed as part of a Future Development, if such improvements are
not separately assessed, Landlord shall reasonably allocate Taxes between the Building and such improvements and the land area
associated  with  the  same.  From  and  after  the  Applicable  Fiscal  Year,  such  allocation  shall  be  effected  based  upon  the  Taxes
payable by Landlord with respect to the unit in the Condominium in which the Property is located.

(b)    “Tax Period” shall be any fiscal/tax period in respect of which Taxes are due and payable to the appropriate
governmental taxing authority (i.e., as mandated by the governmental taxing authority), any portion of which period occurs during
the Term of this Lease.

(c)    Payment of Taxes. Commencing as of the Term Commencement Date and continuing thereafter throughout
the remainder of the Term of the Lease, Tenant shall pay to Landlord, as additional rent, Tenant’s Share of Taxes. Landlord may
make a good faith estimate of the Taxes to be due by Tenant for any Tax Period or part thereof during the Term, and Tenant shall
pay to Landlord, on the Term Commencement Date and on the first (1st) day of each calendar month thereafter, an amount equal
to Tenant’s Share of Taxes for such Tax Period or part thereof divided by the number of months therein. Landlord may estimate
and  re-estimate  Tenant’s  Share  of  Taxes  and  deliver  a  copy  of  the  estimate  or  re-estimate  to  Tenant.  Thereafter,  the  monthly
installments of Tenant’s Share of Taxes shall be appropriately adjusted in accordance with the estimations so that, by the end of the
Tax Period in question, Tenant shall have paid all of Tenant’s Share of Taxes as estimated by Landlord. Any amounts paid based
on such an estimate shall be subject to adjustment as herein provided when actual Taxes are available for each Tax Period. If the
total of such monthly remittances is greater than Tenant’s Share of Taxes actually due for such Tax Period, then, provided no Event
of Default has occurred nor any event which, with the passage of time and/or the giving of notice would constitute an Event of
Default, Tenant may credit the difference against the next installment of additional rent on account of Taxes due hereunder, except

that if such difference is determined after the end of the Term, Landlord shall refund such difference to Tenant within thirty (30)
days after such determination to the extent that such difference exceeds any amounts then due from Tenant to Landlord. If the total
of  such  remittances  is  less  than  Tenant’s  Share  of  Taxes  actually  due  for  such  Tax  Period,  Tenant  shall  pay  the  difference  to
Landlord, as additional rent hereunder, within ten (10) days of Tenant’s receipt of an invoice therefor. Landlord’s estimate for the
next  Tax  Period  shall  be  based  upon  actual  Taxes  for  the  prior  Tax  Period  plus  a  reasonable  adjustment  based  upon  estimated
increases in Taxes. The provisions of this Section 5.3(c) shall survive the expiration or earlier termination of this Lease.

(d)    Effect of Abatements. Appropriate credit against Taxes shall be given for any refund obtained by reason of a
reduction  in  any  Taxes  by  the  assessors  or  the  administrative,  judicial  or  other  governmental  agency  responsible  therefor  after
deduction  of  Landlord’s  expenditures  for  reasonable  legal  fees  and  for  other  reasonable  expenses  incurred  in  obtaining  the  Tax
refund.

(e)    Part Years. If the Term Commencement Date or the Expiration Date occurs in the middle of a Tax Period,
Tenant shall be liable for only that portion of the Taxes, as the case may be, with respect to such Tax Period within the Term from
and after the Term Commencement Date.

5.4

Late Payments.

(a)    Any payment of Rent due hereunder not paid when due shall bear interest for each month or fraction thereof
from  the  due  date  until  paid  in  full  at  the  annual  rate  of  twelve  percent  (12%),  or  at  any  applicable  lesser  maximum  legally
permissible rate for debts of this nature (the “Default Rate”).

(b)    Additionally, if Tenant fails to make any payment within five (5) days after the due date therefor, Landlord
may  charge  Tenant  a  fee,  which  shall  constitute  liquidated  damages,  equal  to  three  (3%)  of  any  such  late  payment;  provided,
however, Landlord shall waive the late fee once in any twelve-(12)-month period in the event Tenant shall pay such late payment
within five
(5) days following Landlord’s written notice to Tenant of the occurrence of such late payment.

(c)        For  each  Tenant  payment  check  to  Landlord  that  is  returned  by  a  bank  for  any  reason,  Tenant  shall  pay  a

returned check charge equal to the amount as shall be customarily charged by Landlord’s bank at the time.

(d)    Money paid by Tenant to Landlord shall be applied to Tenant’s account in the following order: first, to any
unpaid additional rent, including without limitation late charges, returned check charges, legal fees and/or court costs chargeable to
Tenant hereunder; and then to unpaid Base Rent.

(e)    The parties agree that the late charge referenced in Section 5.4(b) represents a fair and reasonable estimate of
the  costs  that  Landlord  will  incur  by  reason  of  any  late  payment  by  Tenant,  and  the  payment  of  late  charges  and  interest  are
distinct and separate in that the payment of interest is to compensate Landlord for the use of Landlord’s money by Tenant, while
the payment

of  late  charges  is  to  compensate  Landlord  for  Landlord’s  processing,  administrative  and  other  costs  incurred  by  Landlord  as  a
result of Tenant’s delinquent payments. Acceptance of a late

charge or interest shall not constitute a waiver of Tenant’s default with respect to the overdue amount or prevent Landlord from
exercising any of the other rights and remedies available to Landlord under this Lease or at law or in equity now or hereafter in
effect.

(f)    If Tenant during any six (6) month period shall be more than five (5) business days delinquent in the payment
of any installment of Rent on three (3) or more occasions, then, notwithstanding anything herein to the contrary, Landlord may, by
written notice to Tenant, elect to require Tenant to pay all Base Rent and additional rent on account of Operating Costs and Taxes
quarterly in advance. Such right shall be in addition to and not in lieu of any other right or remedy available to Landlord hereunder
or at law on account of Tenant’s default hereunder.

5.5        No  Offset;  Independent  Covenants;  Waiver.  Rent  shall  be  paid  without  notice  or  demand,  and  without  setoff,
counterclaim, defense, abatement, suspension, deferment, reduction or deduction, except as expressly provided herein. TENANT
WAIVES ALL RIGHTS (I) TO ANY ABATEMENT, SUSPENSION, DEFERMENT, REDUCTION OR DEDUCTION OF
OR FROM RENT, AND (II) TO QUIT, TERMINATE OR SURRENDER THIS LEASE OR THE PREMISES OR ANY
PART  THEREOF,  EXCEPT  AS  EXPRESSLY  PROVIDED  HEREIN.  TENANT  HEREBY  ACKNOWLEDGES  AND
AGREES  THAT  THE  OBLIGATIONS  OF  TENANT  HEREUNDER  SHALL  BE  SEPARATE  AND  INDEPENDENT
COVENANTS  AND  AGREEMENTS,  THAT  RENT  SHALL  CONTINUE  TO  BE  PAYABLE  IN  ALL  EVENTS  AND
THAT  THE  OBLIGATIONS  OF  TENANT  HEREUNDER  SHALL  CONTINUE  UNAFFECTED,  UNLESS  THE
REQUIREMENT  TO  PAY  OR  PERFORM  THE  SAME  SHALL  HAVE  BEEN  TERMINATED  PURSUANT  TO  AN
EXPRESS  PROVISION  OF  THIS  LEASE.  LANDLORD  AND  TENANT  EACH  ACKNOWLEDGES  AND  AGREES
THAT  THE  INDEPENDENT  NATURE  OF  THE  OBLIGATIONS  OF  TENANT  HEREUNDER  REPRESENTS  FAIR,
REASONABLE,  AND  ACCEPTED  COMMERCIAL  PRACTICE  WITH  RESPECT  TO  THE  TYPE  OF  PROPERTY
SUBJECT  TO  THIS  LEASE,  AND  THAT  THIS  AGREEMENT  IS  THE  PRODUCT  OF  FREE  AND  INFORMED
NEGOTIATION  DURING  WHICH  BOTH  LANDLORD  AND  TENANT  WERE  REPRESENTED  BY  COUNSEL
SKILLED IN NEGOTIATING AND DRAFTING COMMERCIAL LEASES IN MASSACHUSETTS, AND THAT THE
ACKNOWLEDGEMENTS AND AGREEMENTS CONTAINED HEREIN ARE MADE WITH FULL KNOWLEDGE OF
THE HOLDING IN WESSON V.
LEONE  ENTERPRISES,  INC.,  437  MASS.  708  (2002).  SUCH  ACKNOWLEDGEMENTS,  AGREEMENTS  AND
WAIVERS BY TENANT ARE A MATERIAL INDUCEMENT TO LANDLORD ENTERING INTO THIS LEASE.

5.6    Survival. Any obligations under this Section 5 which shall not have been paid at the expiration or earlier termination
of  the  Term  shall  survive  such  expiration  or  earlier  termination  and  shall  be  paid  when  and  as  the  amount  of  same  shall  be
determined and be due.

6.

7.

INTENTIONALLY DELETED.

LETTER OF CREDIT

7.1    Amount. Contemporaneously with the execution of this Lease, Tenant shall deliver to Landlord either (i) cash in the

amount specified in the Lease Summary Sheet (the “Cash

Security Deposit”), which shall be held by Landlord in accordance with Section 7.5 below, or (ii) an irrevocable letter of credit
(the “Letter of Credit”) that shall (a) be in the initial amount of
$1,519,282.90; (b) be issued in substantially the form attached hereto as Exhibit 6; (c) name Landlord as its beneficiary; (d) be
drawn on an FDIC insured financial institution reasonably satisfactory to Landlord that both (x) either has an office in the greater
Boston metropolitan area that will accept presentation of, and pay against, the Letter of Credit or will permit drawings by facsimile
or overnight courier, and (y) satisfies both the Minimum Rating Agency Threshold and the Minimum Capital Threshold (as those
terms  are  defined  below).  The  “Minimum  Rating  Agency  Threshold”  shall  mean  that  the  issuing  bank  has  outstanding
unsecured, uninsured and unguaranteed senior long-term indebtedness that is then rated (without regard to qualification of such
rating by symbols such as “+” or “-” or numerical notation) “Baa” or better by Moody’s Investors Service, Inc. and/or “BBB” or
better  by  Standard  &  Poor’s  Rating  Services,  or  a  comparable  rating  by  a  comparable  national  rating  agency  designated  by
Landlord in its discretion. The “Minimum Capital Threshold” shall mean that the Issuing Bank has combined capital, surplus
and  undivided  profits  of  not  less  than  $10,000,000,000.  Notwithstanding  the  foregoing,  Landlord  hereby  agrees  that,  as  of  the
Execution Date, Silicon Valley Bank, N.A. is an Approved Issuer. The Letter of Credit (and any renewals or replacements thereof)
shall be for a term of not less than one (1) year. If the issuer of the Letter of Credit gives notice of its election not to renew such
Letter of Credit for any additional period, Tenant shall be required to deliver a substitute Letter of Credit satisfying the conditions
hereof at least thirty (30) days prior to the expiration of the term of such Letter of Credit. If the issuer of the Letter of Credit fails
to satisfy either or both of the Minimum Rating Agency Threshold or the Minimum Capital Threshold, Tenant shall be required to
deliver a substitute letter of credit from another issuer reasonably satisfactory to the Landlord and that satisfies both the Minimum
Rating Agency Threshold and the Minimum Capital Threshold not later than ten (10) Business Days after Landlord notifies Tenant
of such failure. Tenant agrees that it shall from time to time, as necessary, whether as a result of a draw on the Letter of Credit by
Landlord pursuant to the terms hereof or as a result of the expiration of the Letter of Credit then in effect, renew or replace the
original and any subsequent Letter of Credit so that a Letter of Credit, in the amount required hereunder, is in effect until a date
which is at least sixty (60) days after the Expiration Date. If Tenant fails to furnish such renewal or replacement at least sixty (60)
days  prior  to  the  stated  expiration  date  of  the  Letter  of  Credit  then  held  by  Landlord,  Landlord  may  draw  upon  such  Letter  of
Credit and hold the proceeds thereof (and such proceeds need not be segregated) as a Security Deposit pursuant to the terms of this
Article  7.  Any  renewal  or  replacement  of  the  original  or  any  subsequent  Letter  of  Credit  shall  meet  the  requirements  for  the
original Letter of Credit as set forth above, except that such replacement or renewal shall be issued by a national bank reasonably
satisfactory to Landlord at the time of the issuance thereof.

7.2    Application of Proceeds of Letter of Credit. Upon an Event of Default, or if any proceeding shall be instituted by or
against  Tenant  pursuant  to  any  of  the  provisions  of  any  Act  of  Congress  or  State  law  relating  to  bankruptcy,  reorganizations,
arrangements, compositions or other relief from creditors (and, in the case of any proceeding instituted against it, if Tenant shall
fail to have such proceedings dismissed within ninety (90) days) or if Tenant is adjudged bankrupt or insolvent as a result of any
such  proceeding,  Landlord  at  its  sole  option  may  draw  down  all  or  a  part  of  the  Letter  of  Credit.  The  balance  of  any  Letter  of
Credit cash proceeds shall be held in accordance with Section 7.5 below. Should the entire Letter of Credit, or any portion thereof,
be  drawn  down  by  Landlord,  Tenant  shall,  upon  the  written  demand  of  Landlord,  deliver  a  replacement  Letter  of  Credit  in  the
amount drawn, and Tenant’s failure to do so within ten (10)

days after receipt of such written demand shall constitute an additional Event of Default hereunder. The application of all or any
part of the cash proceeds of the Letter of Credit to any obligation or default of Tenant under this Lease shall not deprive Landlord
of any other rights or remedies Landlord may have nor shall such application by Landlord constitute a waiver by Landlord.

7.3    Transfer of Letter of Credit. In the event that Landlord transfers its interest in the Premises, Tenant shall upon notice
from  and  at  no  cost  to  Landlord,  deliver  to  Landlord  an  amendment  to  the  Letter  of  Credit  or  a  replacement  Letter  of  Credit
naming Landlord’s successor as the beneficiary thereof. If Tenant fails to deliver such amendment or replacement within ten
(10) days after written notice from Landlord, Landlord shall have the right to draw down the entire amount of the Letter of Credit
and hold the proceeds thereof in accordance with Section 7.5 below.

7.4    Cash Proceeds of Letter of Credit. Landlord shall hold the Cash Security Deposit and/or the balance of proceeds
remaining  after  a  draw  on  the  Letter  of  Credit  (each  hereinafter  referred  to  as  the  “Security Deposit”)  as  security  for  Tenant’s
performance of all its Lease obligations. After an Event of Default, Landlord may apply the Security Deposit, or any part thereof,
to Landlord’s damages without prejudice to any other Landlord remedy. Landlord has no obligation to pay interest on the Security
Deposit  and  may  co-mingle  the  Security  Deposit  with  Landlord’s  funds.  If  Landlord  conveys  its  interest  under  this  Lease,  the
Security Deposit, or any part not applied previously, may be turned over to the grantee in which case Tenant shall look solely to
the grantee for the proper application and return of the Security Deposit.

7.5        Return  of  Security  Deposit  or  Letter  of  Credit.  Should  Tenant  comply  with  all  of  such  terms,  covenants  and
conditions and promptly pay all sums payable by Tenant to Landlord hereunder, the Security Deposit and/or Letter of Credit or the
remaining proceeds therefrom, as applicable, shall be returned to Tenant within sixty (60) days after the end of the Term, less any
portion  thereof  which  may  have  been  utilized  by  Landlord  to  cure  any  default  or  applied  to  any  actual  damage  suffered  by
Landlord.

8.

9.

INTENTIONALLY OMITTED.

UTILITIES, LANDLORD’S SERVICES

9.1        Electricity.  Landlord  shall  contract  with  the  utility  provider  for  electric  service  to  the  Property,  including  the
Premises. Commencing on the Term Commencement Date, Tenant shall pay all charges for electricity furnished to the Premises
and any equipment exclusively serving the Premises, as additional rent, as measured by a submeter, with such metering equipment
to  be  installed  as  part  of  Landlord’s  Work.  At  Tenant’s  request,  Landlord  shall  provide  Tenant  with  reasonable  back-up
documentation regarding the total charges and the method of allocating the charges to Tenant. Tenant shall, at Tenant’s sole cost
and expense, maintain and keep in good order, condition and repair the metering equipment used to measure electricity furnished
to  the  Premises  and  any  equipment  exclusively  serving  the  same.  Tenant  shall  not  exceed  its  allotted  base  building  capacities
defined on Exhibit 5 attached hereto.

9.2        Water.  Landlord  shall  contract  with  the  utility  provider  for  water  service  to  the  Property,  including  the  Premises.
Except  as  otherwise  provided  below,  the  cost  of  providing  water  service  to  the  Premises  and  all  other  portions  of  the  Building
(including, without limitation, the

premises of other tenants or occupants of the Building) shall be included in Operating Costs. Notwithstanding the foregoing, if
Landlord determines that Tenant is using water in excess of its proportionate share (by floor area) of the total water usage in the
Building, Landlord may elect, at Tenant’s expense, to furnish and install in a location in or near the Premises metering equipment
to measure water furnished to the Premises and any equipment exclusively serving the same. In such event, Tenant shall, within
thirty (30) days after Landlord’s written demand therefor from time to time, pay to Landlord, as additional rent, the full amount of
any water service charges attributable to such meter.

9.3    Gas. Landlord shall contract with the utility provider for gas service to the Property, including the Premises. The cost
of gas used to serve base building plumbing, mechanical and electrical systems shall be included in the costs reimbursed by Tenant
pursuant to Section 9.6 below. If Tenant requires gas service for the operation of Tenant’s laboratory equipment in the Premises,
Tenant shall pay all charges for gas furnished to the Premises and/or any equipment exclusively serving the Premises as additional
rent, based, at Landlord’s election,
(i)
Tenant’s expense.

on Landlord’s reasonable estimate of such gas usage or (ii) on metering or submetering equipment installed by Landlord at

9.4    Other Utilities. Subject to Landlord’s reasonable rules and regulations governing the same, Tenant shall obtain and
pay,  as  and  when  due,  for  all  other  utilities  and  services  consumed  in  and/or  furnished  to  the  Premises,  together  with  all  taxes,
penalties,  surcharges  and  maintenance  charges  pertaining  thereto.  Tenant  shall  be  responsible  for  all  telephone  and  data  wiring
throughout its Premises.

9.5        Interruption  or  Curtailment  of  Utilities.  When  necessary  by  reason  of  accident  or  emergency,  or  for  repairs,
alterations, replacements or improvements which in the reasonable judgment of Landlord are desirable or necessary to be made,
Landlord reserves the right, upon as much prior notice to Tenant as is practicable under the circumstances and no less than twenty-
four
(24) hours’ notice except in the event of an emergency, to interrupt, curtail, or stop (i) the furnishing of hot and/or cold water, and
(ii)  the  operation  of  the  plumbing  and  electric  systems.  Landlord  shall  diligently  exercise  commercially  reasonable  efforts  to
reduce the duration of and eliminate the cause of any such interruption, curtailment, stoppage or suspension, but there shall be no
diminution or abatement of Rent or other compensation due from Landlord to Tenant hereunder, nor shall this Lease be affected or
any  of  Tenant’s  obligations  hereunder  reduced,  and  Landlord  shall  have  no  responsibility  or  liability  for  any  such  interruption,
curtailment,  stoppage,  or  suspension  of  services  or  systems.  Notwithstanding  the  foregoing,  (i)  in  the  event  any  of  the  utilities
serving the Property and the Premises are interrupted and unavailable for more than thirty
(30)  continuous  calendar  days,  Tenant  shall,  at  Tenant’s  option,  have  the  ability  to  suspend  the  payment  of  Rent  until  all  such
utilities are again fully serving the Property and the Premises, and
(ii)
in  the  event  that  any  such  interruption  and  unavailability  continues  for  more  than  sixty  (60)  continuous  calendar  days,
Tenant shall, at Tenant’s option, have the right to terminate this Lease by giving Landlord written notice of Tenant’s election to
terminate at any time after the expiration of such sixty-day period and before all such utilities are again fully serving the Property
and the Premises.

9.6    Landlord’s Services. Subject to reimbursement pursuant to Section 5.2 above, and subject to Tenant’s allotted base

building capacities defined on Exhibit 5 as aforesaid,

Landlord shall provide the services described in Exhibit 7 attached hereto and made a part hereof (“Landlord’s Services”).  All
documented costs incurred by Landlord to provide HVAC service to the Premises and not included in Operating Costs shall be
reimbursed  by  Tenant  to  Landlord  as  additional  rent.  Except  for  the  foregoing,  and  except  for  the  cost  of  providing  and
maintaining  supplemental  HVAC  equipment  exclusively  serving  the  Premises  (which  shall  be  Tenant’s  responsibility),  all  costs
incurred  in  connection  with  the  provision  of  Landlord’s  Services  shall  be  included  in  Operating  Costs  to  the  extent  allowable
pursuant to Section 5.2.

10. MAINTENANCE AND REPAIRS

10.1       Maintenance and Repairs by Tenant. Tenant shall keep neat and clean and free of insects, rodents, vermin and
other pests and in good repair, order and condition (reasonable wear and tear and damage by Casualty excepted): the Premises,
including without limitation the entire interior of the Premises, all electronic, phone and data cabling and related equipment (other
than building service equipment) that is installed by or for the exclusive benefit of the Tenant (whether located in the Premises or
other portions of the Building), all fixtures, equipment and specialty lighting therein, any supplemental HVAC and humidification
equipment  exclusively  serving  the  Premises,  electrical  equipment  wiring,  doors,  non-structural  walls,  windows  and  floor
coverings,  and  all  laboratory  specific  systems  and  equipment  that  exclusively  serve  the  Premises,  including,  without  limitation,
equipment critical to laboratory operations. Without limiting the foregoing, Tenant agrees that it shall maintain in the same repair,
order,  and  condition  as  on  the  Term  Commencement  Date  (reasonable  wear  and  tear  and  damage  by  Casualty  excepted)  any
equipment which is the responsibility for Tenant to maintain as set forth in this Lease.

10.2        Maintenance  and  Repairs  by  Landlord.  Except  as  otherwise  provided  in  Section  15,  and  subject  to  Tenant’s
obligations  in  Section  10.1  above,  Landlord  shall  maintain  and  keep  in  reasonable  condition  the  Building  foundation,  the  roof,
Building structure, structural floor slabs and columns in good repair, order and condition. In addition, Landlord shall operate and
maintain the Common Areas in substantially the same manner as comparable combination office and laboratory facilities in the
vicinity of the Premises. All costs incurred by Landlord under this Section 10.2 shall be included in Operating Costs as provided in
Section 5.2.

10.3    Accidents to Sanitary and Other Systems. Tenant shall give to Landlord prompt notice of any fire or accident in
the  Premises  or  in  the  Building  and  of  any  damage  to,  or  defective  condition  in,  any  part  or  appurtenance  of  the  Building
including, without limitation, sanitary, electrical, ventilation, heating and air conditioning or other systems located in, or passing
through, the Premises. Except as otherwise provided in Section 15, and subject to Tenant’s obligations in Section 10.1 above, such
damage or defective condition shall be remedied by Landlord with reasonable diligence, but, subject to Section 14.5 below, if such
damage or defective condition was caused by any of the Tenant Parties, the cost to remedy the same shall be paid by Tenant.

10.4    Floor Load--Heavy Equipment. Tenant shall not place a load upon any floor of the Premises exceeding the floor
load per square foot of area which such floor was designed to carry and which is allowed by Legal Requirements. The floor load
capacity of the Premises is 100 pounds per square foot, with the exception of certain areas near the vicinity of the western façade
of the Building, where the floor load capacity is 50 pounds per square foot. Landlord reserves the right to prescribe the weight and
position of all safes, heavy machinery, heavy equipment, freight,

bulky  matter  or  fixtures  (collectively,  “Heavy Equipment”),  which  shall  be  placed  so  as  to  distribute  the  weight.  Tenant  shall
notify Landlord of the proposed locations of any Heavy Equipment prior to its installation in the Premises. Heavy Equipment shall
be  placed  and  maintained  by  Tenant  at  Tenant’s  expense  in  settings  sufficient  in  Landlord’s  reasonable  judgment  to  absorb  and
prevent vibration, noise and annoyance. Tenant shall not move any Heavy Equipment into or out of the Building without giving
Landlord  prior  written  notice  thereof  and  observing  all  of  Landlord’s  Rules  and  Regulations  with  respect  to  the  same.  If  such
Heavy Equipment requires special handling, Tenant agrees to employ only persons holding a Master Rigger’s License to do said
work, and that all work in connection therewith shall comply with Legal Requirements. Any such moving shall be at the sole risk
and hazard of Tenant and Tenant will defend, indemnify and save Landlord and Landlord’s agents (including without limitation its
property manager), contractors and employees (collectively with Landlord, the “Landlord Parties”)  harmless  from  and  against
any  and  all  claims,  damages,  losses,  penalties,  costs,  expenses  and  fees  (including  without  limitation  reasonable  legal  fees)
(collectively,  “Claims”)  resulting  directly  or  indirectly  from  such  moving.  Proper  placement  of  all  Heavy  Equipment  in  the
Premises shall be Tenant’s responsibility.

10.5    Premises Cleaning. Tenant shall be responsible, at its sole cost and expense, for janitorial and trash removal services
and other biohazard disposal services for the Premises, including any laboratory areas thereof. Such services shall be performed by
licensed (where required by law or governmental regulation), insured and qualified contractors approved in advance, in writing, by
Landlord (which approval shall not be unreasonably withheld, delayed or conditioned) and on a sufficient basis to ensure that the
Premises are at all times kept neat and clean. Landlord shall provide a dumpster and/or compactor at the Building loading dock for
Tenant’s  disposal  of  non-hazardous  and  non-controlled  substances.  All  costs  incurred  by  Landlord  in  connection  with  such
dumpster and/or compactor shall be included in Operating Costs as provided in Section 5.2.

10.6    Pest Control. Tenant, at Tenant’s sole cost and expense, shall cause the Premises to be exterminated on a quarterly
basis (or more frequently if Landlord reasonably determines the same to be necessary) to Landlord’s reasonable satisfaction and
shall  cause  all  portions  of  the  Premises  used  for  the  storage,  preparation,  service  or  consumption  of  food  or  beverages  to  be
cleaned daily in a manner reasonably satisfactory to Landlord, and to be treated as necessary against infestation by insects, rodents
and other vermin and pests whenever there is evidence of any infestation. Tenant shall not permit any person to enter the Premises
for  the  purpose  of  providing  such  extermination  services,  unless  such  persons  have  been  reasonably  approved  by  Landlord.  If
requested  by  Landlord,  Tenant  shall,  at  Tenant’s  sole  cost  and  expense,  store  any  refuse  generated  in  the  Premises  by  the
consumption of food or beverages in a cold box or similar facility.

10.7

Service Interruptions.

(a)    Abatement of Rent. In the event that: (i) there shall be an interruption, curtailment or suspension of any service
or failure to perform any obligation required to be provided or performed by Landlord pursuant to Sections 9 and/or 10 (and no
reasonably equivalent alternative service or supply is provided by Landlord) that shall materially interfere with Tenant’s use and
enjoyment of the Premises, or any portion thereof (any such event, a “Service

Interruption”),  and  (ii)  such  Service  Interruption  shall  continue  for  five  (5)  consecutive  business  days  following  receipt  by
Landlord of written notice (the “Service Interruption Notice”) from Tenant describing such Service Interruption (“Abatement
Service  Interruption  Cure  Period”),  and  (iii)  such  Service  Interruption  shall  not  have  been  caused  by  an  act  or  omission  of
Tenant  or  Tenant’s  agents,  employees,  contractors  or  invitees  (an  event  that  satisfies  the  foregoing  conditions  (i)-(iii)  being
referred to hereinafter as a “Material Service Interruption”) then, Tenant, subject to the next following sentence, shall be entitled
to  an  equitable  abatement  of  Base  Rent,  Operating  Costs  and  Taxes  based  on  the  nature  and  duration  of  the  Material  Service
Interruption and the area of the Premises affected, for any and all days following the Material Service Interruption Cure Period that
both (x) the Material Service Interruption is continuing and (y) Tenant does not use such affected areas of the Premises for a bona
fide  business  purpose.  Any  efforts  by  Tenant  to  respond  or  react  to  any  Material  Service  Interruption,  including,  without
limitation, any activities by Tenant to remove its personal property from the affected areas of the Premises, shall not constitute a
use that precludes abatement pursuant to this Section 10.7(a). The Abatement Service Interruption Cure Period shall be extended
by  reason  of  any  delays  in  Landlord’s  ability  to  cure  the  Service  Interruption  in  question  caused  by  Landlord’s  Force  Majeure,
provided  however,  that  in  no  event  shall  the  extension  of  the  Abatement  Service  Interruption  Cure  Period  with  respect  to  any
Service  Interruption  be  longer  than  fifteen  (15)  consecutive  business  days  after  Landlord  receives  the  applicable  Service
Interruption Notice.

(b)    The provisions of this Section 10.7 shall not apply in the event of a Service Interruption caused by Casualty or

Taking (see Section 15 hereof).

(c)    The provisions of this Section 10.7 set forth Tenant’s sole rights and remedies, both in law and in equity, in the

event of any Service Interruption.

11.

ALTERATIONS AND IMPROVEMENTS BY TENANT

11.1 Landlord’s Consent Required.

(a)        Tenant  shall  not  make  any  alterations,  decorations,  installations,  removals,  additions  or  improvements
(collectively “Alterations”) in or to the Premises without Landlord’s prior written approval of the contractor(s), written plans and
specifications and a time schedule therefor. Landlord reserves the right to require that Tenant use Landlord’s preferred vendor(s)
(and  Landlord  agrees  to  provide  at  least  two  (2)  preferred  vendors  for  any  project)  for  any  Alterations  that  involve  roof
penetrations,  alarm  tie-ins,  sprinklers,  fire  alarm  and  other  life  safety  equipment.  Tenant  shall  not  make  any  amendments  or
additions to plans and specifications approved by Landlord without Landlord’s prior written consent. Landlord’s approval of non-
structural Alterations shall not be unreasonably withheld, conditioned or delayed. Notwithstanding the foregoing, Landlord may
withhold its consent in its sole discretion (i) to any Alteration to or affecting the roof and/or building systems, (ii) with respect to
matters  of  aesthetics  relating  to  Alterations  to  or  affecting  the  exterior  of  the  Building,  and  (iii)  to  any  Alteration  affecting  the
Building  structure.  Tenant  shall  be  responsible  for  all  elements  of  the  design  of  Tenant’s  plans  (including,  without  limitation,
compliance  with  Legal  Requirements,  functionality  of  design,  the  structural  integrity  of  the  design,  the  configuration  of  the
Premises and the placement of Tenant’s furniture, appliances and equipment), and Landlord’s approval of Tenant’s plans shall in
no event relieve Tenant of the responsibility for such design. In seeking Landlord’s approval, Tenant shall

provide  Landlord,  at  least  fourteen  (14)  business  days  in  advance  of  any  proposed  construction,  with  plans,  specifications,  bid
proposals,  certified  stamped  engineering  drawings  and  calculations  by  Tenant’s  engineer  of  record  or  architect  of  record,
(including connections to the Building’s structural system, modifications to the Building’s envelope, non-structural penetrations in
slabs  or  walls,  and  modifications  or  tie-ins  to  life  safety  systems),  work  contracts,  requests  for  laydown  areas  and  such  other
information concerning the nature and cost of the alterations as Landlord may reasonably request. Landlord shall have no liability
or  responsibility  for  any  claim,  injury  or  damage  alleged  to  have  been  caused  by  the  particular  materials  (whether  building
standard or non- building standard), appliances or equipment selected by Tenant in connection with any work performed by or on
behalf of Tenant. Except as otherwise expressly set forth herein, all Alterations shall be done at Tenant’s sole cost and expense and
at such times and in such manner as Landlord may from time to time reasonably designate. If Tenant shall make any Alterations,
then  Landlord  may  elect  to  require  Tenant  at  the  expiration  or  sooner  termination  of  the  Term  to  restore  the  Premises  to
substantially the same condition as existed immediately prior to the Alterations provided that such election shall be made at the
time Landlord gives its approval for such Alterations, provided further Landlord will not elect to require Tenant to remove any
Alterations unless the same, in Landlord’s reasonable judgment, (i) adversely affect the general utility of the Building for use by
prospective future tenants and/or (ii) required unusual expense to readapt the Premises to normal use as a biotechnology office and
research  and  development  facility.  Landlord  agrees  that  Tenant  shall  have  no  obligation  to  remove  any  customary  office/non-
laboratory Alterations to the Premises. Tenant shall provide Landlord with reproducible record drawings (in CAD format) of all
Alterations within sixty (60) days after completion thereof.

(b)    Alterations Permitted without Landlord’s Consent. Notwithstanding the provisions of Section 11.1(a), the
Alterations which (x) consist solely of decorative or cosmetic work that does not affect or involve the Building’s structure or base
systems, and (y) which do not cost in excess of Seventy-Five Thousand Dollars ($75,000.00), shall not be subject to Landlord's
prior  approval  provided  that  Tenant  delivers  a  reasonable  description  of  such  Alterations  to  Landlord  at  least  five  (5)  business
days’ prior to commencing such work and subject to the remaining provisions of this Section 11.

11.2        After-Hours.  Landlord  and  Tenant  recognize  that  to  the  extent  Tenant  elects  to  perform  some  or  all  of  the
Alterations during times other than normal construction hours (i.e., Monday-Friday, 7:00 a.m. to 3:00 p.m., excluding holidays),
Landlord  may  need  to  make  arrangements  to  have  supervisory  personnel  on  site.  Accordingly,  Landlord  and  Tenant  agree  as
follows: Tenant shall give Landlord at least two (2) business days’ prior written notice of any time outside of normal construction
hours when Tenant intends to perform any Alterations (the “After- Hours Work”). Tenant shall reimburse Landlord, within ten
(10) days after demand therefor, for the cost of Landlord’s supervisory personnel overseeing the After-Hours Work. In addition, if
construction during normal construction hours unreasonably disturbs other tenants of the Building, in Landlord’s sole discretion,
Landlord may require Tenant to stop the performance of Alterations during normal construction hours and to perform the same
after hours, subject to the foregoing requirement to pay for the cost of Landlord’s supervisory personnel.

11.3        Harmonious Relations.  Tenant  agrees  to  conduct  its  labor  relations  and  its  relations  with  its  employees  in  such
manner as to avoid all strikes, picketing and boycotts of, on or about the Premises or the Building. Tenant further agrees that if any
of its employees strike or

if a picket line or boycott is established or conducted or carried out on or about the Property against Tenant or its contractors or
employees, or any of them, Tenant will forthwith cease those operations in and upon the Premises that have caused the same until
all disputes are settled.

11.4    Liens. No Alterations shall be undertaken by Tenant until (i) Tenant has made provision for written waiver of liens
from all contractors for such Alteration and taken other appropriate protective measures approved and/or required by Landlord;
and  (ii)  Tenant  has  procured  appropriate  surety  payment  and  performance  bonds  which  shall  name  Landlord  as  an  additional
obligee  and  has  filed  lien  bond(s)  (in  jurisdictions  where  available)  on  behalf  of  such  contractors.  Any  mechanic’s  lien  filed
against  the  Premises  or  the  Building  for  work  claimed  to  have  been  done  for,  or  materials  claimed  to  have  been  furnished  to,
Tenant shall be discharged by Tenant within ten (10) days thereafter, at Tenant’s expense by filing the bond required by law or
otherwise.

11.5    General Requirements. Unless Landlord and Tenant otherwise agree in writing, Tenant shall (a) procure or cause
others to procure on its behalf all necessary permits before undertaking any Alterations in the Premises (and provide copies thereof
to Landlord); (b) perform all of such Alterations in a good and workmanlike manner, employing materials of good quality and in
compliance with Landlord’s construction rules and regulations, all insurance requirements of this Lease, and Legal Requirements;
and (c) defend, indemnify and hold the Landlord Parties harmless from and against any and all Claims occasioned by or growing
out of such Alterations.

12.

SIGNAGE

12.1        Restrictions.  Tenant  shall  have  the  right,  at  Tenant’s  expense,  to  install  Building  standard  signage  identifying
Tenant’s  business  at  the  entrance  to  the  Premises,  which  signage  shall  be  subject  to  Landlord’s  prior  written  consent  (which
consent shall not be unreasonably withheld, conditioned or delayed). Subject to the foregoing, and subject to Section 12.2 below,
Tenant shall not place or suffer to be placed or maintained on the exterior of the Premises, or any part of the interior visible from
the exterior thereof, any sign, banner, advertising matter or any other thing of any kind (including, without limitation, any hand-
lettered advertising),  and  shall  not  place  or  maintain  any  decoration,  letter  or  advertising matter on the glass of any window or
door of the Premises without first obtaining Landlord’s written approval. No signs or blinds may be put on or in any window or
elsewhere if visible from the exterior of the Building, provided that Tenant shall be permitted to install Building standard blinds in
the Premises.

12.2 Exterior Signage.

(a)       Monument Signage.  Subject  to  the  provisions  of  this  Section  12.2,  for  so  long  as:  (x)  there  is  no  Event  of
Default of Tenant and (y) the Lease is in full force and effect (the “Monument Signage Condition”), then Tenant shall have the
right to require Landlord to list, at Landlord’s initial cost and expense, Tenant’s name (“Tenant’s Monument Signage”) on each
of  the  two  (2)  exterior  monument  signs  to  be  constructed  by  Landlord  on  the  Property.  Such  monument  signs  shall  each  be  a
common monument (i.e. other tenant(s) in the Building may have identification signage installed on such monuments). The right
to the Tenant’s Monument Signage granted pursuant to this Section 12.2 is personal to Tenant, and may not be exercised by any
occupant, subtenant, or other assignee of Tenant, other than an Affiliated Entity or Successor (the

parties hereby agreeing that Tenant shall be responsible for the cost of any change in Tenant’s Monument Signage). The parties
hereby agree that the maintenance and removal of such Tenant’s Monument Signage (including, without limitation, the repair and
cleaning of the existing monument façade upon removal of Tenant’s Monument Signage) shall be performed at Landlord’s sole
cost  and expense, except  that  Tenant  shall  be  responsible  for  the  cost  of  any  change in Tenant’s Monument Signage during the
initial Term of the lease.

12.3 Building Directory.

Landlord shall list Tenant within the directory in the Building lobby at Landlord’s sole cost and expense.

13.

ASSIGNMENT, MORTGAGING AND SUBLETTING

13.1    Landlord’s Consent Required. Tenant shall not mortgage or encumber this Lease in whole or in part whether at one
time  or  at  intervals,  operation  of  law  or  otherwise.  Except  as  expressly  otherwise  set  forth  herein  Tenant  shall  not,  without
Landlord’s  prior  written  consent,  assign,  sublet,  license  or  transfer  this  Lease  or  the  Premises  in  whole  or  in  part  whether  by
changes in 50% or more of the ownership or control of Tenant, or any direct or indirect owner of Tenant, whether at one time or at
intervals, by sale or transfer of stock, partnership or beneficial interests, operation of law or otherwise, or permit the occupancy of
all or any portion of the Premises by any person or entity other than Tenant’s employees (each of the foregoing, a “Transfer”).
Any purported Transfer made without Landlord’s consent, if required hereunder, shall be void and confer no rights upon any third
person, provided that if there is a Transfer, Landlord may collect rent from the transferee without waiving the prohibition against
Transfers,  accepting  the  transferee,  or  releasing  Tenant  from  full  performance  under  this  Lease.  In  the  event  of  any  Transfer  in
violation of this Section 13, Landlord shall have the right to terminate this Lease upon thirty (30) days’ written notice to Tenant
given within sixty (60) days after receipt of written notice from Tenant to Landlord of any Transfer, or within sixty (60) days after
Landlord first learns of the Transfer if no notice is given. No Transfer shall relieve Tenant of its primary obligation as party Tenant
hereunder,  nor  shall  it  reduce  or  increase  Landlord's  obligations  under  this  Lease.  Notwithstanding  the  foregoing,  so  long  as
Tenant’s stock is traded on a public exchange, the sale or transfer of such stock shall not be deemed a Transfer.

13.2 Landlord’s Recapture Right.

(a)    Subject to Section 13.7 below, Tenant shall, prior to offering or advertising the Premises or any portion thereof
for  assignment  or  sublease,  give  a  written  notice  (the  “Recapture Notice”)  to  Landlord  which:  (i)  states  that  Tenant  desires  to
make  a  Transfer,  (ii)  identifies  the  affected  portion  of  the  Premises  (the  “Recapture Premises”),  (iii)  in  the  case  of  a  sublease
identifies  the  period  of  time  (the  “Recapture  Period”)  during  which  Tenant  proposes  to  sublet  the  Recapture  Premises,  or
indicates that Tenant proposes to assign its interest in this Lease, and (iv) offers to Landlord to terminate this Lease with respect to
the Recapture Premises (in the case of a proposed assignment of Tenant's interest in this Lease or a subletting for the remainder of
the term of this Lease) or to suspend the Term for the Recapture Period (i.e. the Term with respect to the Recapture Premises shall
be terminated during the Recapture Period and Tenant's rental obligations shall be proportionately reduced). Landlord shall have
fifteen (15) business days

within  which  to  respond  to  the  Recapture  Notice.  Notwithstanding  the  foregoing,  within  the  first  three  (3)  years  after  the  Term
Commencement  Date,  Tenant  shall  not  be  required  to  deliver  a  Recapture  Notice  to  Landlord  prior  to  offering  or  advertising  a
portion of the Premises constituting less than fifty percent (50%) of the Premises for sublease.

(b)    Notwithstanding anything to the contrary contained herein, if Landlord notifies Tenant that it accepts the offer
contained in the Recapture  Notice  or  any  subsequent  Recapture  Notice,  Tenant shall have the right, for a period of fifteen (15)
days  following  receipt  of  such  notice  from  Landlord,  time  being  of  the  essence,  to  notify  Landlord  in  writing  that  it  wishes  to
withdraw such offer and this Lease shall continue in full force and effect.

13.3    Standard of Consent to Transfer. If Landlord does not timely give written notice to Tenant accepting a Recapture
Offer or declines to accept the same (or in the case of a sublease for which Tenant is not required to deliver a Recapture Notice, as
set  forth  in  Section  13.2(a)  above),  then  Landlord  agrees  that,  subject  to  the  provisions  of  this  Section  13,  Landlord  shall  not
unreasonably withhold, condition or delay its consent to a Transfer on the terms contained in the Recapture Notice to an entity
which will use the Premises for the Permitted Uses and, in Landlord's reasonable opinion: (a) has a tangible net worth and other
financial  indicators  sufficient  to  meet  the  Transferee’s  obligations  under  the  Transfer  instrument  in  question;  (b)  has  a  business
reputation compatible with the operation of a first-class combination laboratory, research, development and office building; and (c)
the intended use of such entity does not violate any restrictive use provisions then in effect with respect to space in the Building.

13.4    Listing Confers no Rights. The listing of any name other than that of Tenant, whether on the doors of the Premises
or  on  the  Building  directory,  or  otherwise,  shall  not  operate  to  vest  in  any  such  other  person,  firm  or  corporation  any  right  or
interest in this Lease or in the Premises or be deemed to effect or evidence any consent of Landlord, it being expressly understood
that any such listing is a privilege extended by Landlord revocable at will by written notice to Tenant.

13.5    Profits In Connection with Transfers. Tenant shall, within thirty (30) days of receipt thereof, pay to Landlord fifty
percent (50%) of any rent, sum or other consideration to be paid or given in connection with any Transfer, either initially or over
time,  after  deducting  reasonable  actual  out-of-pocket  legal,  and  brokerage  expenses  incurred  by  Tenant  and  unamortized
improvements paid for by Tenant in connection therewith, in excess of Rent hereunder as if such amount were originally called for
by the terms of this Lease as additional rent.

13.6    Prohibited Transfers. Notwithstanding any contrary provision of this Lease, Tenant shall have no right to make a
Transfer unless on both (i) the date on which Tenant notifies Landlord of its intention to enter into a Transfer and (ii) the date on
which such Transfer is to take effect, Tenant is not in default of any of its obligations under this Lease. Notwithstanding anything
to the contrary contained herein, Tenant agrees that in no event shall Tenant make a Transfer to (a) any government agency; (b)
any tenant, subtenant or occupant of other space in the Building provided that Landlord has, or will within six (6) months after the
date of Tenant’s Recapture Notice have, comparable space available in the Building or in another building on the Campus; or
(c) any entity with whom Landlord shall have negotiated for space in the Property in the six (6) months immediately preceding
such proposed Transfer.

13.7    Exceptions to Requirement for Consent. Notwithstanding anything to the contrary herein contained, Tenant shall
have the right, without obtaining Landlord's consent and without giving Landlord a Recapture Notice, to make a Transfer to (a) an
Affiliated Entity (hereinafter defined) so long as such entity remains in such relationship to Tenant, and (b) a Successor, provided
that prior to or simultaneously with any such Transfer, such Affiliated Entity or Successor, as the case may be, and Tenant execute
and  deliver  to  Landlord  an  assignment  and  assumption  agreement  in  form  and  substance  reasonably  acceptable  to  Landlord
whereby  such  Affiliated  Entity  or  Successor,  as  the  case  may  be,  shall  agree  to  be  independently  bound  by  and  upon  all  the
covenants, agreements, terms, provisions and conditions set forth in the Lease on the part of Tenant to be performed, and whereby
such  Affiliated  Entity  or  Successor,  as  the  case  may  be,  shall  expressly  agree  that  the  provisions  of  this  Section  13  shall,
notwithstanding  such  Transfer,  continue  to  be  binding  upon  it  with  respect  to  all  future  Transfers.  For  the  purposes  hereof,  an
“Affiliated Entity” shall be defined as any entity (a) that, in the case of an assignment of this Lease, has a net worth and other
financial indicators demonstrating such entity’s ability to perform all of Tenant’s obligations hereunder, as evidenced by audited
financial  statements,  or,  in  the  case  of  a  sublease,  has  the  financial  capability  to  perform  the  obligations  assumed  under  the
sublease;  and  (b)  which  is  controlled  by,  is  under  common  control  with,  or  which  controls  Tenant.  For  the  purposes  hereof,  a
“Successor” shall be defined as any entity into or with which Tenant is merged or with which Tenant is consolidated or which
acquires  all  or  substantially  all  of  Tenant’s  stock  or  assets,  provided  that  the  surviving  entity  shall  have  a  net  worth  and  other
financial indicators sufficient to meet Tenant’s obligations hereunder.

14.

INSURANCE; INDEMNIFICATION; EXCULPATION

14.1 Tenant’s Insurance.

(a)        Tenant  shall  procure,  pay  for  and  keep  in  force  throughout  the  Term  (and  for  so  long  thereafter  as  Tenant
remains in occupancy of the Premises) commercial general liability insurance insuring Tenant on an occurrence basis against all
claims  and  demands  for  personal  injury  liability  (including,  without  limitation,  bodily  injury,  sickness,  disease,  and  death)  or
damage to property which may be claimed to have occurred from and after the time any of the Tenant Parties shall first enter the
Premises, of not less than One Million Dollars ($1,000,000) per occurrence and Two Million Dollars ($2,000,000) in the aggregate
annually, and from time to time thereafter shall be not less than such higher amounts, if procurable, as may be reasonably required
by Landlord. Tenant shall also carry umbrella liability coverage in an amount of no less than Ten Million Dollars ($10,000,000).
Such  policy  shall  also  include  contractual  liability  coverage  covering  Tenant’s  liability  assumed  under  this  Lease,  including
without  limitation  Tenant’s  indemnification  obligations.  Such  insurance  policy(ies)  shall  name  Landlord,  Landlord’s  managing
agent and persons claiming by, through or under them, if any, as additional insureds.

(b)        Tenant  shall  take  out  and  maintain  throughout  the  Term  a  policy  of  fire,  vandalism,  malicious  mischief,
extended  coverage  and  so-called  “all  risk”  coverage  insurance  in  an  amount  equal  to  one  hundred  percent  (100%)  of  the
replacement cost insuring (i) all items or components of Alterations (collectively, the “Tenant-Insured Improvements”), and (ii)
all of Tenant’s furniture, equipment, fixtures and property of every kind, nature and description related or arising out of Tenant’s
leasehold estate hereunder, which may be in or upon the Premises or the Building, including without limitation Tenant’s Penthouse
Equipment and all of Tenant’s animals

(collectively, “Tenant’s Property”). Such insurance required to be maintained by Tenant pursuant to this Section 14.1(b) (referred
to herein as “Tenant Property Insurance”) shall insure the interests of both Landlord and Tenant as their respective interests may
appear from time to time.

(c)    Tenant shall take out and maintain a policy of business interruption insurance throughout the Term sufficient to

cover at least twelve (12) months of Rent due hereunder and Tenant’s business losses during such 12-month period.

(d)       During  periods  when  Tenant’s  Work  and/or  any  Alterations  are  being  performed,  Tenant  shall  maintain,  or
cause to be maintained, so-called all risk or special cause of loss property insurance or its equivalent and/or builders risk insurance
on  100%  replacement  cost  coverage  basis,  including  hard  and  soft  costs  coverages.  Such  insurance  shall  protect  and  insure
Landlord, Landlord’s agents, Tenant and Tenant’s contractors, as their interests may appear, against loss or damage by fire, water
damage, vandalism and malicious mischief, and such other risks as are customarily covered by so-called all risk or special cause of
loss property / builders risk coverage or its equivalent.

(e)    Tenant shall procure and maintain at its sole expense such additional insurance as may be necessary to comply

with any Legal Requirements.

(f)    Tenant shall cause all contractors and subcontractors to maintain during the performance of any Alterations the

insurance described in Exhibit 10 attached hereto.

(g)    The insurance required pursuant to Sections 14.1(a), (b), (c), (d) and (e) (collectively, “Tenant’s  Insurance
Policies”)  shall  be  effected  with  insurers  approved  by  Landlord,  with  a  rating  of  not  less  than  “A-XI”  in  the  current  Best’s
Insurance Reports, and authorized to do business in the Commonwealth of Massachusetts under valid and enforceable policies.
Tenant’s Insurance Policies shall each provide that it shall not be canceled without at least thirty (30) days’ prior written notice to
each  insured  named  therein.  Tenant’s  Insurance  Policies  may  include  deductibles  in  an  amount  no  greater  than  the  greater  of
$25,000  or  commercially  reasonable  amounts.  On  or  before  the  date  on  which  any  of  the  Tenant  Parties  shall  first  enter  the
Premises and thereafter not less than fifteen (15) days prior to the expiration date of each expiring policy, Tenant shall deliver to
Landlord  binders  of  Tenant’s  Insurance  Policies  issued  by  the  respective  insurers  setting  forth  in  full  the  provisions  thereof
together with evidence satisfactory to Landlord of the payment of all premiums for such policies. In the event of any claim, and
upon  Landlord’s  request,  Tenant  shall  deliver  to  Landlord  complete  copies  of  Tenant’s  Insurance  Policies.  Upon  request  of
Landlord, Tenant shall deliver to any Mortgagee copies of the foregoing documents.

14.2

Indemnification.

(a)    Except to the extent caused by the gross negligence, willful misconduct or breach of this Lease of and by any
of  the  Landlord  Parties,  Tenant  shall  defend,  indemnify  and  save  the  Landlord  Parties  harmless  from  and  against  any  and  all
Claims asserted by or on behalf of any person, firm, corporation or public authority arising from:

(i)

Tenant’s breach of any covenant or obligation under this Lease;

at or about the Premises;

(ii)    Any injury to or death of any person, or loss of or damage to property, sustained or occurring in, upon,

occupancy of the Premises by or the negligence or willful misconduct of any of the Tenant Parties; and

(iii)        Any  injury  to  or  death  of  any  person,  or  loss  of  or  damage  to  property  arising  out  of  the  use  or

(iv)    On account of or based upon any work or thing whatsoever done (other than by Landlord or any of the
Landlord Parties) at the Premises during the Term and during the period of time, if any, prior to the Term Commencement Date
that any of the Tenant Parties may have been given access to the Premises.

(b)    Landlord shall defend, indemnify and save the Tenant harmless from and against any and all Claims asserted
by or on behalf of any person, firm, corporation or public authority to the extent arising from Landlord’s gross negligence, willful
misconduct or breach of this Lease Agreement.

14.3    Property of Tenant. Tenant covenants and agrees that, except to the extent caused by the gross negligence, willful
misconduct  or  breach  of  this  Lease  of  and  by  any  of  the  Landlord  Parties  to  the  maximum  extent  permitted  by  Legal
Requirements, all of Tenant’s Property at the Premises shall be at the sole risk and hazard of Tenant, and that if the whole or any
part thereof shall be damaged, destroyed, stolen or removed from any cause or reason whatsoever, no part of said damage or loss
shall be charged to, or borne by, Landlord, except, subject to Section 14.5 hereof, to the extent such damage or loss is due to the
gross negligence, willful misconduct or breach of this Lease Agreement of or by any of the Landlord Parties.

14.4    Limitation of Landlord’s Liability for Damage or Injury. Landlord shall not be liable for any injury or damage to
persons, animals or property resulting from fire, explosion, falling plaster, steam, gas, air contaminants or emissions, electricity,
electrical or electronic emanations or disturbance, water, rain or snow or leaks from any part of the Building or from the pipes,
appliances, equipment or plumbing works or from the roof, street or sub-surface or from any other place or caused by dampness,
vandalism,  malicious  mischief  or  by  any  other  cause  of  whatever  nature,  except  to  the  extent  caused  by  or  due  to  the  gross
negligence, willful misconduct or breach of this Lease Agreement of and by any of the Landlord Parties, and then, where notice
and an opportunity to cure are appropriate (i.e., where Tenant has an opportunity to know or should have known of such condition
sufficiently  in  advance  of  the  occurrence  of  any  such  injury  or  damage  resulting  therefrom  as  would  have  enabled  Landlord  to
prevent  such  damage  or  loss  had  Tenant  notified  Landlord  of  such  condition)  only  after  (i)  notice  to  Landlord  of  the  condition
claimed  to  constitute  gross  negligence,  willful  misconduct  or  a  breach  of  this  Lease  Agreement,  and  (ii)  the  expiration  of  a
reasonable time after such notice has been received by Landlord without Landlord having commenced to take all reasonable and
practicable  means  to  cure  or  correct  such  condition;  and  pending  such  cure  or  correction  by  Landlord,  Tenant  shall  take  all
reasonably  prudent  temporary  measures  and  safeguards  to  prevent  any  injury,  loss  or  damage  to  persons  or  property.
Notwithstanding the foregoing, in no event shall any of the Landlord Parties be liable for any loss which is covered by insurance
policies  actually  carried  or  required  to  be  so  carried  by  this  Lease;  nor  shall  any  of  the  Landlord  Parties  be  liable  for  any  such
damage caused by other tenants or persons in the Building or caused by operations in construction of any private, public,

or quasi-public work; nor shall any of the Landlord Parties be liable for any damage or injury in connection with any latent defect
in the Premises or in the Building.

14.5        Waiver  of  Subrogation;  Mutual  Release.  Landlord  and  Tenant  each  hereby  waives  on  behalf  of  itself  and  its
property (i.e., as opposed to liability) insurers (none of which shall ever be assigned any such claim or be entitled thereto due to
subrogation or otherwise) any and all rights of recovery, claim, action, or cause of action against the other and its agents, officers,
servants, partners, shareholders, or employees (collectively, the “Related Parties”) for any loss or damage that may occur to or
within the Premises or the Building or any improvements thereto, or any personal property of such party therein which is insured
against under any property insurance policy actually being maintained by the waiving party from time to time, even if not required
hereunder, or which would be insured against under the terms of any insurance policy required to be carried or maintained by the
waiving party hereunder, whether or not such insurance coverage is actually being maintained, including, in every instance, such
loss or damage that may be caused by the negligence of the other party hereto and/or its Related Parties. Landlord and Tenant each
agrees  to  cause  appropriate  clauses  to  be  included  in  its  property  insurance  policies  necessary  to  implement  the  foregoing
provisions.

14.6    Tenant’s Acts--Effect on Insurance. Tenant shall not do or permit any Tenant Party to do any act or thing upon the
Premises or elsewhere in the Building which will invalidate or be in conflict with any insurance policies covering the Building and
the fixtures and property therein; and shall not do, or permit to be done, any act or thing upon the Premises which shall subject
Landlord to any liability or responsibility for injury to any person or persons or to property by reason of any business or operation
being carried on upon said Premises or for any other reason. If by reason of the failure of Tenant to comply with the provisions
hereof the insurance rate applicable to any policy of insurance shall at any time thereafter be higher than it otherwise would be,
Tenant shall reimburse Landlord upon demand for that part of any insurance premiums which shall have been charged because of
such failure by Tenant, together with interest at the Default Rate until paid in full, within ten (10) days after receipt of an invoice
therefor. In addition, Tenant shall reimburse Landlord for any increase in insurance premium arising as a result of Tenant’s use
and/or storage of any Hazardous Materials in the Premises.

14.7        Landlord’s  Insurance.  Landlord  shall  carry  at  all  times  during  the  Term  of  this  Lease:  (i)  commercial  general
liability insurance with respect to the Building, the Land and the Common Areas thereof in an amount not less than Five Million
Dollars  ($5,000,000)  combined  single  limit  per  occurrence,  (ii)  with  respect  to  the  Building,  excluding  Tenant-Insured
Improvements  and  improvements  made  by  other  tenants  or  occupants,  insurance  against  loss  or  damage  caused  by  any  peril
covered under fire, extended coverage and all risk insurance with coverage against vandalism, malicious mischief and such other
insurable  hazards  and  contingencies  as  are  from  time  to  time  normally  insured  against  by  owners  of  similar  first  class
offices/research/laboratory buildings/campuses in the Market Area or which are required by Landlord’s mortgagee, in an amount
equal  to  one  hundred  percent  (100%)  of  the  full  replacement  cost  thereof  above  foundation  walls  (“Landlord  Property
Insurance”), and (iii) rent interruption insurance covering at least eighteen (18) months. Any and all such insurance: (x) may be
maintained under a blanket policy affecting other properties of Landlord and/or its affiliated business organizations, and (y) may
be written with commercially reasonable deductibles as determined by Landlord. The costs incurred by Landlord related to such
insurance shall be

included in Operating Costs. Tenant Property Insurance and Landlord Property Insurance are referred to collectively herein as
“Property Insurance”.

15.

CASUALTY; TAKING

15.1    Damage. If the Premises are damaged in whole or part because of fire or other insured casualty (“Casualty”), or if
the Premises are subject to a taking in connection with the exercise of any power of eminent domain, condemnation, or purchase
under threat or in lieu thereof (any of the foregoing, a “Taking”), then unless this Lease is terminated in accordance with Section
15.2    below, Landlord shall restore the Building and/or the Premises to substantially the same condition as existed immediately
following completion of Landlord’s Work, or in the event of a partial Taking which affects the Building and the Premises, restore
the remainder of the Building and the Premises not so Taken to substantially the same condition as is reasonably feasible. If, in
Landlord’s reasonable judgment, any element of the Tenant-Insured Improvements can more effectively be restored as an integral
part of Landlord’s restoration of the Building or the Premises, such restoration shall also be made by Landlord, but at Tenant’s sole
cost  and  expense.  Subject  to  rights  of  Mortgagees,  Tenant  Delays,  Legal  Requirements  then  in  existence  and  to  delays  for
adjustment of insurance proceeds or Taking awards, as the case may be, and instances of Landlord’s Force Majeure, Landlord shall
substantially complete such restoration within one (1) year after Landlord’s receipt of all required permits therefor with respect to
substantial reconstruction of at least 50% of the Building, or, within one hundred eighty (180) days after Landlord’s receipt of all
required  permits  therefor  in  the  case  of  restoration  of  less  than  50%  of  the  Building.  Upon  substantial  completion  of  such
restoration  by  Landlord,  Tenant  shall  use  diligent  efforts  to  complete  restoration  of  the  Premises  to  substantially  the  same
condition  as  existed  immediately  prior  to  such  Casualty  or  Taking,  as  the  case  may  be,  as  soon  as  reasonably  possible.  Tenant
agrees to cooperate with Landlord in such manner as Landlord may reasonably request to assist Landlord in collecting insurance
proceeds due in connection with any Casualty which affects the Premises or the Building. In no event shall Landlord be required
to  expend  more  than  the  Net  (hereinafter  defined)  insurance  proceeds  Landlord  receives  for  damage  to  the  Premises  and/or  the
Building or the Net Taking award attributable to the Premises and/or the Building. “Net” means the insurance proceeds or Taking
award actually paid to Landlord (and not paid over to a Mortgagee) less all costs and expenses, including adjusters and attorney’s
fees,  of  obtaining  the  same.  In  the  Operating  Year  in  which  a  Casualty  occurs,  there  shall  be  included  in  Operating  Costs
Landlord’s deductible under its property insurance policy. Except as Landlord may elect pursuant to this Section 15.1, under no
circumstances shall Landlord be required to repair any damage to, or make any repairs to or replacements of, any Tenant-Insured
Improvements.

15.2 Termination Rights.

(a)    Landlord’s Termination Rights. Landlord may terminate this Lease upon thirty (30) days’ prior written notice

to Tenant if:

thereto is taken;

(i)

any material portion of the Building or any material means of access

Casualty; or

(ii)

more than thirty-five percent (35%) of the Building is
damaged by

receives all required permits for such restoration.

(iii)    if the estimated time to complete restoration exceeds one (1) year from the date on which Landlord

(b)    Tenant’s Termination Right. If Landlord is so required but fails to complete restoration of the Premises within

the time frames and subject to the conditions set forth in Section
15.1  above,  then  Tenant  may  terminate  this  Lease  upon  thirty  (30)  days’  written  notice  to  Landlord;  provided,  however,  that  if
Landlord completes such restoration within thirty (30) days after receipt of any such termination notice, such termination notice
shall be null and void and this Lease shall continue in full force and effect. The remedies set forth in this Section 15.2(b) and in
Section  15.2(c)  below  are  Tenant’s  sole  and  exclusive  rights  and  remedies  based  upon  Landlord’s  failure  to  complete  the
restoration of the Premises as set forth herein. Notwithstanding anything to the contrary contained herein, Tenant shall not have
the right to terminate this Lease pursuant to this Section 15 if the Casualty was caused by the negligence or intentional misconduct
of any Tenant Party.

(c)    Further Termination Rights. In the case of any Casualty or Taking affecting the Premises and occurring during
the last twelve (12) months of the Term, then (i) if such Casualty or Taking results in more than twenty-five percent (25%) of the
floor area of the Premises being unsuitable for the Permitted Uses, or (ii) the damage to the Premises costs more than $250,000 to
restore, then either Landlord or Tenant shall have the option to terminate this Lease upon thirty
(30) days’ written notice to the other. In addition, if Landlord’s Mortgagee does not release sufficient insurance proceeds to cover
the cost of Landlord’s restoration obligations, then Landlord shall (i) notify Tenant thereof, and (ii) have the right to terminate this
Lease. If Landlord does not terminate this Lease pursuant to the previous sentence and such notice by Landlord does not include
an agreement by Landlord to pay for the difference between the cost of such restoration and such released insurance proceeds, then
Tenant  may  terminate  this  Lease  by  written  notice  to  Landlord  on  or  before  the  date  that  is  thirty  (30)  days  after  such  notice.
Notwithstanding  anything  to  the  contrary  contained  in  this  Section  15,  in  no  event  may  Tenant  elect  to  terminate  this  Lease
hereunder if the Casualty that would otherwise give rise to such right results from the gross negligence or willful misconduct of
Tenant, its agents, contractors, or employees.

(d)        Automatic Termination.  In  the  case  of  a  Taking  of  the  entire  Premises,  then  this  Lease  shall  automatically

terminate as of the date of possession by the Taking authority.

15.3    Rent Abatement. In the event of a Casualty affecting the Premises, there shall be an equitable adjustment of Base
Rent,  Operating  Costs  and  Taxes  based  upon  the  degree  to  which  Tenant’s  ability  to  conduct  its  business  in  the  Premises  is
impaired by reason of such Casualty from and after the date of a Casualty, and continuing until the following portions of the repair
and restoration work to be performed by Landlord, as set forth above, are substantially completed: (i) any repair and restoration
work to be performed by Landlord within the Premises, and (ii) repair and restoration work with respect to the Common Areas to
the extent that damage to the Common Areas caused by such Casualty materially adversely affects Tenant’s use of, or access to,
the Premises.

15.4        Taking  for  Temporary  Use.  If  the  Premises  are  Taken  for  temporary  use,  this  Lease  and  Tenant’s  obligations,

including without limitation the payment of Rent, shall continue.

For purposes hereof, a “Taking for temporary use” shall mean a Taking of ninety (90) days or less.

15.5    Disposition of Awards. Except for any separate award for Tenant’s movable trade fixtures, relocation expenses, and
unamortized leasehold improvements paid for by Tenant (provided that the same may not reduce Landlord’s award), all Taking
awards to Landlord or Tenant shall be Landlord’s property without Tenant’s participation, and Tenant hereby assigns to Landlord
Tenant’s interest, if any, in such award. Tenant may pursue its own claim against the Taking authority.

16.

ESTOPPEL CERTIFICATE.

Tenant  shall  at  any  time  and  from  time  to  time  upon  not  less  than  ten  (10)  days’  prior  notice  from  Landlord,  execute,
acknowledge and deliver to Landlord a statement in writing certifying that this Lease is unmodified and in full force and effect (or
if there have been modifications, that the same is in full force and effect as modified and stating the modifications), and the dates
to  which  Rent  has  been  paid  in  advance,  if  any,  stating  whether  or  not  Landlord  is  in  default  in  performance  of  any  covenant,
agreement, term, provision or condition contained in this Lease and, if so, specifying each such default, and such other facts as
Landlord may reasonably request, it being intended that any such statement delivered pursuant hereto may be relied upon by any
prospective purchaser of the Building or of any interest of Landlord therein, any Mortgagee or prospective Mortgagee thereof, any
lessor or prospective lessor thereof, any lessee or prospective lessee thereof, or any prospective assignee of any mortgage thereof.
Time  is  of  the  essence  with  respect  to  any  such  requested  certificate,  Tenant  hereby  acknowledging  the  importance  of  such
certificates  in  mortgage  financing  arrangements,  prospective  sales  and  the  like.  If  Tenant  shall  fail  to  execute  and  deliver  to
Landlord any such statement within such ten-day period, Tenant hereby appoints Landlord as Tenant’s attorney-in-fact in its name
and behalf to execute such statement, such appointment being coupled with an interest.

17.

HAZARDOUS MATERIALS

17.1

Prohibition.

(a)    Tenant shall not, without the prior written consent of Landlord, bring or permit to be brought or kept in or on
the Premises or elsewhere in the Building or the Property (i) any inflammable, combustible or explosive fluid, material, chemical
or  substance  (except  for  standard  office  supplies  stored  in  proper  containers);  and  (ii)  any  Hazardous  Material  (hereinafter
defined), other than, if Tenant’s use of the Premises includes research, development, warehouse, laboratory use, or other ancillary
uses related to the foregoing, the types and quantities of Hazardous Materials which are approved by Landlord in advance, which
approval shall not be unreasonably withheld, conditioned or delayed (“Tenant’s Hazardous Materials”), provided that the same
shall at all times be:

(i)

brought upon, kept or used in Tenant’s Control Areas (as hereinafter

defined);

defined;

(ii)

in compliance with the Control Area Limitations, as
hereinafter

Environmental Laws (hereinafter defined); and

(iii)        in  accordance  with  all  applicable  Legal  Requirements,  including,  without  limitation,  all  applicable

“biohazard” materials) good scientific and medical practice.

(iv)    in accordance with prudent environmental practice and (with respect to medical waste and so-called

(b)    “Tenant’s Control Areas” consist of the entirety of the Prime Premises and the Storage Area. The “Control

Areas Limitations” are determined in accordance with the International Building Code (2018) (“IBC”), and are as follows:

(i)    Prime Premises. The parties acknowledge that the Prime Premises on the fourth floor shall be deemed
to consist of two (2) Control Areas, as defined by the IBC, and Tenant shall not, in the Prime Premises, exceed the limitations
which are imposed by the IBC on use and storage of Hazardous Materials for premises consisting of two Control Areas, and

permitted for one Control Area under the IBC.

(ii)    Storage Area. Tenant shall not, at any time, exceed in the Storage Area, the solvent storage capacity

(c)        Tenant  shall  be  responsible  for  assuring  that  all  laboratory  uses  are  adequately  and  properly  vented.  On  or
before each anniversary of the Term Commencement Date, and on any earlier date during the 12-month period on which Tenant
intends  to  add  a  new  Hazardous  Material  or  materially  increase  the  quantity  of  any  Hazardous  Material  to  the  list  of  Tenant’s
Hazardous Materials, Tenant shall submit to Landlord an updated list of Tenant’s Hazardous Materials for Landlord’s review and
approval, which approval shall not be unreasonably withheld, conditioned or delayed. Landlord shall have the right, from time to
time, to inspect the Premises for compliance with the terms of this Section 17.1. Notwithstanding the foregoing, with respect to
any of Tenant’s Hazardous Materials which Tenant does not properly handle, store or dispose of in compliance with all applicable
Environmental  Laws  (hereinafter  defined),  prudent  environmental  practice  and  (with  respect  to  medical  waste  and  so-called
“biohazard materials”) good scientific and medical practice, Tenant shall, upon written notice from Landlord, no longer have the
right to bring such material into the Building or the Property until Tenant has demonstrated, to Landlord’s reasonable satisfaction,
that Tenant has implemented programs to thereafter properly handle, store or dispose of such material. In order to induce Landlord
to waive its otherwise applicable requirement that Tenant maintain insurance in favor of Landlord against liability arising from the
presence of radioactive materials in the Premises, and without limiting the foregoing, Tenant hereby represents and warrants to
Landlord  that  at  no  time  during  the  Term  will  Tenant  bring  upon,  or  permit  to  be  brought  upon,  the  Premises  any  radioactive
materials whatsoever.

17.2    Environmental Laws. For purposes hereof, “Environmental Laws” shall mean all laws, statutes, ordinances, rules
and  regulations  of  any  local,  state  or  federal  governmental  authority  having  jurisdiction  concerning  environmental,  health  and
safety matters, including but not limited to any discharge by any of the Tenant Parties into the air, surface water, sewers, soil or
groundwater of any Hazardous Material (hereinafter defined) whether within or outside the Premises, including, without limitation
(a) the Federal Water Pollution Control Act, 33 U.S.C. Section 1251 et seq., (b) the Federal Resource Conservation and Recovery
Act, 42 U.S.C. Section 6901 et seq., (c) the Comprehensive Environmental Response, Compensation and Liability Act,

42 U.S.C. Section 9601 et seq., (d) the Toxic Substances Control Act of 1976, 15 U.S.C. Section 2601 et seq., and (e) Chapter 21E
of the General Laws of Massachusetts. Tenant, at its sole cost and expense, shall comply with (i) Environmental Laws, and (ii) any
rules, requirements and safety procedures of the Massachusetts Department of Environmental Protection, the Town of Lexington
and any insurer of the Building or the Premises with respect to Tenant’s use, storage and disposal of any Hazardous Materials.

17.3        Hazardous  Material  Defined.  As  used  herein,  the  term  “Hazardous  Material”  means  asbestos,  oil  or  any
hazardous,  radioactive  or  toxic  substance,  material  or  waste  or  petroleum  derivative  which  is  or  becomes  regulated  by  any
Environmental Law, including without limitation live organisms, viruses and fungi, medical waste and any so-called “biohazard”
materials.  The  term  “Hazardous  Material”  includes,  without  limitation,  oil  and/or  any  material  or  substance  which  is  (i)
designated  as  a  “hazardous  substance,”  “hazardous  material,”  “oil,”  “hazardous  waste”  or  toxic  substance  under  any
Environmental Law.

17.4        Chemical  Safety  Program.  If  at  any  time  during  the  Term,  Tenant’s  use  of  the  Premises  includes  research,
development,  warehouse,  laboratory  use,  or  other  ancillary  uses  related  to  the  foregoing,  Tenant  shall  establish  and  maintain  a
chemical safety program administered by a licensed, qualified individual in accordance with the requirements of any applicable
governmental authority. Tenant shall be solely responsible for all costs incurred in connection with such chemical safety program,
and Tenant shall provide Landlord with such documentation as Landlord may reasonably require evidencing Tenant’s compliance
with  the  requirements  of  (a)  any  applicable  governmental  authority  with  respect  to  such  chemical  safety  program  and  (b)  this
Section. Tenant shall obtain and maintain during the Term any permit required by any such applicable governmental authority.

17.5        Testing.  If  any  Mortgagee  or  governmental  authority  requires  testing  to  determine  whether  there  has  been  any
release of Hazardous Materials and such testing is required as a result of the acts or omissions of any of the Tenant Parties, then
Tenant  shall  reimburse  Landlord  upon  demand,  as  additional  rent,  for  the  reasonable  costs  thereof,  together  with  interest  at  the
Default  Rate  until  paid  in  full.  Tenant  shall  execute  affidavits,  certifications  and  the  like,  as  may  be  reasonably  requested  by
Landlord from time to time concerning Tenant's best knowledge and belief concerning the presence of Hazardous Materials in or
on the Premises, the Building or the Property. In addition to the foregoing, if Landlord reasonably believes that any Hazardous
Materials have been released on the Premises in violation of this Lease or any Legal Requirement, Landlord shall have the right to
conduct  appropriate  tests  of  the  Premises  or  any  portion  thereof  to  demonstrate  that  Hazardous  Materials  are  present  or  that
contamination has occurred due to the acts or omissions of any of the Tenant Parties. Tenant shall pay all reasonable costs of such
tests  if  such  tests  reveal  that  Hazardous  Materials  exist  at  the  Premises  in  material  violation  of  this  Lease  or  any  Legal
Requirement. Further, Landlord shall have the right to cause a third party consultant retained by Landlord, at Landlord’s expense
(provided, however, that such costs shall be included in Operating Costs), to review, but not more than once in any calendar year,
Tenant’s  lab  operations,  procedures  and  permits  to  ascertain  whether  or  not  Tenant  is  complying  with  law  and  adhering  to  best
industry  practices.  Tenant  agrees  to  cooperate  in  good  faith  with  any  such  review  and  to  provide  to  such  consultant  any
information requested by such consultant and reasonably required in order for such consultant to perform such review, but nothing
contained herein shall require Tenant to provide proprietary or confidential information to such consultant.

17.6

Indemnity; Remediation.

(a)    Tenant hereby covenants and agrees to indemnify, defend and hold the Landlord Parties harmless from and
against any and all Claims against any of the Landlord Parties arising out of contamination of any part of the Property or other
adjacent property, which contamination arises as a result of: (i) the presence of Hazardous Material in the Premises, the presence
of which is caused by any act or omission of any of the Tenant Parties, or (ii) from a breach by Tenant of its obligations under this
Section  17.  This  indemnification  of  the  Landlord  Parties  by  Tenant  includes,  without  limitation,  reasonable  costs  incurred  in
connection with any investigation of site conditions or any cleanup, remedial, removal or restoration work or any other response
actions required by any federal, state or local governmental agency or political subdivision because of Hazardous Material present
in the soil, soil vapor or ground water on or under or any indoor air in the Building based upon the circumstances identified in the
first  sentence  of  this  Section  17.6.  The  indemnification  and  hold  harmless  obligations  of  Tenant  under  this  Section  17.6  shall
survive the expiration or any earlier termination of this Lease. Without limiting the foregoing, if the presence of any Hazardous
Material  in  the  Building  or  otherwise  in  the  Property  is  caused  or  permitted  by  any  of  the  Tenant  Parties  and  results  in  any
contamination of any part of the Property or any adjacent property, Tenant shall promptly take all actions at Tenant’s sole cost and
expense as are necessary to return the Property and/or the Building or any adjacent property to their condition as of the date of this
Lease,  provided  that  Tenant  shall  first  obtain  Landlord’s  written  approval  of  such  actions,  which  approval  shall  not  be
unreasonably withheld, conditioned or delayed so long as such actions, in Landlord’s reasonable discretion, would not potentially
have any adverse effect on the Property, and, in any event, Landlord shall not withhold its approval of any proposed actions which
are  required  by  applicable  Environmental  Laws.  The  provisions  of  this  Section  17.6  shall  survive  the  expiration  or  earlier
termination of the Lease.

(b)    Without limiting the obligations set forth in Section 17.6(a) above, if any Hazardous Material is in, on, under,
at  or  about  the  Building  or  the  Property  as  a  result  of  the  acts  or  omissions  of  any  of  the  Tenant  Parties  and  results  in  any
contamination of any part of the Property or any adjacent property that is in violation of any applicable Environmental Law or that
requires  the  performance  of  any  response  action  pursuant  to  any  Environmental  Law,  Tenant  shall  promptly  take  all  actions  at
Tenant’s sole cost and expense as are necessary to reduce such Hazardous Material to amounts below any applicable Reportable
Quantity, any applicable Reportable Concentration and any other applicable standard set forth in any Environmental Law such that
no further response actions are required; provided that Tenant shall first obtain Landlord’s written approval of such actions, which
approval shall not be unreasonably withheld, conditioned or delayed so long as such actions would not be reasonably expected to
have an adverse effect on the market value or utility of the Property for the Permitted Uses, and in any event, Landlord shall not
withhold  its  approval  of  any  proposed  actions  which  are  required  by  applicable  Environmental  Laws  (such  approved  actions,
“Tenant’s Remediation”).

(c)    In the event that Tenant fails to complete Tenant’s Remediation prior to the end of the Term, then:

(i)    until the completion of Tenant’s Remediation (as evidenced by the certification of Tenant’s Licensed
Site Professional (as such term is defined by applicable Environmental Laws), who shall be reasonably acceptable to Landlord)
(the “Remediation

Completion  Date”),  Tenant  shall  pay  to  Landlord,  with  respect  to  the  portion  of  the  Premises  which  reasonably  cannot  be
occupied by a new tenant until completion of Tenant’s Remediation,
(A) additional rent on account of Operating Costs and Taxes and (B) Base Rent in an amount equal to the greater of (1) the fair
market rental value of such portion of the Premises (determined in substantial accordance with the process described in Section 1.2
above), and (2) Base Rent attributable to such portion of the Premises in effect immediately prior to the end of the Term; and

(ii)        Tenant  shall  maintain  responsibility  for  Tenant’s  Remediation  and  Tenant  shall  complete  Tenant’s
Remediation  as  soon  as  reasonably  practicable  in  accordance  with  Environmental  Laws.  If  Tenant  does  not  diligently  pursue
completion  of  Tenant’s  Remediation,  Landlord  shall  have  the  right  to  either  (A)  assume  control  for  overseeing  Tenant’s
Remediation, in which event Tenant shall pay all reasonable costs and expenses of Tenant’s Remediation (it being understood and
agreed that all costs and expenses of Tenant’s Remediation incurred pursuant to contracts entered into by Tenant shall be deemed
reasonable) within thirty (30) days of demand therefor (which demand shall be made no more often than monthly), and Landlord
shall  be  substituted  as  the  party  identified  on  any  governmental  filings  as  the  party  responsible  for  the  performance  of  such
Tenant’s  Remediation  or  (B)  require  Tenant  to  maintain  responsibility  for  Tenant’s  Remediation,  in  which  event  Tenant  shall
complete  Tenant’s  Remediation  as  soon  as  reasonably  practicable  in  accordance  with  Environmental  Laws,  it  being  understood
that Tenant’s Remediation shall not contain any requirement that Tenant remediate any contamination to levels or standards more
stringent than those associated with the Property’s current office, research and development, laboratory, and vivarium uses.

(d)    The provisions of this Section 17.6 shall survive the expiration or earlier termination of this Lease.

17.7    Disclosures. Prior to bringing any Hazardous Material into any part of the Property, Tenant shall deliver to Landlord
the following information with respect thereto: (a) a description of handling, storage, use and disposal procedures; (b) all plans or
disclosures  and/or  emergency  response  plans  which  Tenant  has  prepared,  including  without  limitation  Tenant’s  Spill  Response
Plan, and all plans which Tenant is required to supply to any governmental agency or authority pursuant to any Environmental
Laws; (c) copies of all Required Permits relating thereto; and (d) other information reasonably requested by Landlord.

17.8        Removal.  Tenant  shall  be  responsible,  at  its  sole  cost  and  expense,  for  Hazardous  Material  and  other  biohazard
disposal services for the Premises. Such services shall be performed by contractors reasonably acceptable to Landlord and on a
sufficient basis to ensure that the Premises are at all times kept neat, clean and free of Hazardous Materials and biohazards except
in appropriate, specially marked containers reasonably approved by Landlord.

18.

RULES AND REGULATIONS.

18.1    Rules and Regulations. Tenant will faithfully observe and comply with the Rules and Regulations attached hereto
as Exhibits 9-1 and 9-2 (“Current Rules and Regulations”) and reasonable rules and regulations as may be promulgated, from
time  to  time,  with  respect  to  the  Building,  the  Property  and  construction  within  the  Property  (collectively,  the  “Rules  and
Regulations”). The Current Rules and Regulations consist of the Building Rules and Regulations

attached  hereto  as  Exhibit  9-1  and  the  Construction  Rules  and  Regulations  attached  hereto  as  Exhibit  9-2.  In  the  case  of  any
conflict  between  the  provisions  of  this  Lease  and  any  future  rules  and  regulations,  the  provisions  of  this  Lease  shall  control.
Nothing  contained  in  this  Lease  shall  be  construed  to  impose  upon  Landlord  any  duty  or  obligation  to  enforce  the  Rules  and
Regulations or the terms, covenants or conditions in any other lease as against any other tenant and Landlord shall not be liable to
Tenant for violation of the same by any other tenant, its servants, employees, agents, contractors, visitors, invitees or licensees.

18.2    Energy Conservation. Landlord may institute upon written notice to Tenant such policies, programs and measures
as may be necessary, required, or expedient for the conservation and/or preservation of energy or energy services (collectively, the
“Conservation Program”), provided however, that the Conservation Program does not, by reason of such policies, programs and
measures,  reduce  the  level  of  energy  or  energy  services  being  provided  to  the  Premises  below  the  level  of  energy  or  energy
services then being provided in comparable combination laboratory, research and development and office buildings in the vicinity
of the Premises, or as may be necessary or required to comply with Legal Requirements or standards or the other provisions of this
Lease.  Upon  receipt  of  such  notice,  Tenant  shall  comply  with  the  Conservation  Program  unless  Tenant  demonstrates  that  such
compliance places an unreasonable financial or operational burden on Tenant.

18.3    Recycling. Upon written notice, Landlord may establish commercially reasonable policies, programs and measures
for the recycling of paper, products, plastic, tin and other materials (a “Recycling Program”). Upon receipt of such notice, Tenant
will comply with the Recycling Program at Tenant’s sole cost and expense.

19.

LAWS AND PERMITS.

19.1    Legal Requirements. Tenant shall not cause or permit the Premises, or cause the Property or the Building to be used
in  any  way  that  violates  any  Legal  Requirement,  order,  permit,  approval,  variance,  covenant  or  restrictions  of  record  or  any
provisions  of  this  Lease,  interferes  with  the  rights  of  tenants  of  the  Building,  or  constitutes  a  nuisance  or  waste.  Tenant  shall
obtain, maintain and pay for all permits and approvals needed for the operation of Tenant’s business and/or Tenant’s Penthouse
Equipment,  as  soon  as  reasonably  possible,  and  in  any  event  shall  not  undertake  any  operations  or  use  of  Tenant’s  Penthouse
Equipment unless all applicable permits and approvals are in place and shall, promptly take all actions necessary to comply with
all Legal Requirements, including, without limitation, the Occupational Safety and Health Act, applicable to Tenant’s use of the
Premises, the Property or the Building. Tenant shall maintain in full force and effect all certifications or permissions required by
any authority having jurisdiction to authorize, franchise or regulate Tenant’s use of the Premises. Tenant shall be solely responsible
for procuring and complying at all times with any and all necessary permits and approvals directly or indirectly relating or incident
to: the conduct of its activities on the Premises; its scientific experimentation, transportation, storage, handling, use and disposal of
any  chemical  or  radioactive  or  bacteriological  or  pathological  substances  or  organisms  or  other  hazardous  wastes  or
environmentally dangerous substances or materials or medical waste or animals or laboratory specimens. Within ten (10) days of a
request  by  Landlord,  which  request  shall  be  made  not  more  than  once  during  each  period  of  twelve  (12)  consecutive  months
during the Term hereof, unless otherwise requested by any mortgagee of Landlord or unless Landlord reasonably suspects that

Tenant has violated the provisions of this Section 19.1, Tenant shall furnish Landlord with copies of all such permits and approvals
that  Tenant  possesses  or  has  obtained  together  with  a  certificate  certifying  that  such  permits  are  all  of  the  permits  that  Tenant
possesses or has obtained with respect to the Premises. Tenant shall promptly give written notice to Landlord of any warnings or
violations relative to the above received from any federal, state or municipal agency or by any court of law and shall promptly
cure the conditions causing any such violations. Tenant shall not be deemed to be in default of its obligations under the preceding
sentence to promptly cure any condition causing any such violation in the event that, in lieu of such cure, Tenant shall contest the
validity of such violation by appellate or other proceedings permitted under applicable law, provided that: (i) any such contest is
made  reasonably  and  in  good  faith,  (ii)  Tenant  makes  provisions,  including,  without  limitation,  posting  bond(s)  or  giving  other
security, reasonably acceptable to Landlord to protect Landlord, the Building and the Property from any liability, costs, damages or
expenses arising in connection with such alleged violation and failure to cure, (iii) Tenant shall agree to indemnify, defend (with
counsel reasonably acceptable to Landlord) and hold Landlord harmless from and against any and all liability, costs, damages, or
expenses arising in connection with such condition and/or violation, (iv) Tenant shall promptly cure any violation in the event that
its appeal of such violation is overruled or rejected, and (v) Tenant’s decision to delay such cure shall not, in Landlord’s good faith
determination, be likely to result in any actual or threatened bodily injury, property damage, or any civil or criminal liability to
Landlord, any tenant or occupant of the Building or the Property, or any other person or entity. Nothing contained in this Section
19.1 shall be construed to expand the uses permitted hereunder beyond the Permitted Uses. Landlord shall comply with any Legal
Requirements  and  with  any  direction  of  any  public  office  or  officer  relating  to  the  maintenance  or  operation  of  the  structural
elements of the Building and the Common Areas, and the costs so incurred by Landlord shall be included in Operating Costs in
accordance with the provisions of Section 5.2.

20.

DEFAULT

20.1    Events of Default. The occurrence of any one or more of the following events shall constitute an “Event of

Default” hereunder by Tenant:

(a)    If Tenant fails to make any payment of Rent or any other payment required hereunder, as and when due, and
such failure shall continue for a period of five (5) business days after notice thereof to Tenant; provided, however, an Event of
Default shall occur hereunder without any obligation of Landlord to give any notice if (i) Tenant fails to make any payment within
five (5) business days after the due date therefor, and (ii) Landlord has given Tenant written notice under this Section 20.1(a) on
more than one (1) occasion during the twelve (12) month interval preceding such failure by Tenant;

(b)    If Tenant shall abandon the Premises (whether or not the keys shall have been surrendered or the Rent shall

have been paid);

(c)    If Tenant shall fail to execute and deliver to Landlord an estoppel certificate pursuant to Section 16 above or a
subordination  and  attornment  agreement  pursuant  to  Section  22  below,  within  the  timeframes  set  forth  therein,  which  failure
continues for ten (10) days after notice to Tenant thereof;

(d)    If Tenant shall fail to maintain any insurance required hereunder and Tenant fails to cure such default within

three (3) business days of receiving notice of such default;

(e)       If  Tenant  shall  fail  to  restore  the  Security  Deposit  to  its  original  amount  or  deliver  a  replacement  Letter  of
Credit as required under Section 7 above and Tenant fails to cure such default within five (5) business days of receiving notice of
such default;

(f)    If Tenant causes or suffers any release of Hazardous Materials in or near the Property and Tenant fails to cure

the same within thirty (30) days of receiving notice of such default;

(g)    If Tenant shall make a Transfer in violation of the provisions of Section 13 above, or if any event shall occur
or any contingency shall arise whereby this Lease, or the term and estate thereby created, would (by operation of law or otherwise)
devolve upon or pass to any person, firm or corporation other than Tenant, except as expressly permitted under Section 13 hereof;

(h)    If Tenant shall fail to perform its obligations under Section 3 hereof and such failure continues for more than

thirty (30) days after notice thereof from Landlord;

(i)    The failure by Tenant to observe or perform any of the covenants or provisions of this Lease to be observed or
performed by Tenant, other than as specified above, and such failure continues for more than thirty (30) days after notice thereof
from  Landlord;  provided,  further,  that  if  the  nature  of  Tenant's  default  is  such  that  more  than  thirty  (30)  days  are  reasonably
required for its cure, then Tenant shall not be deemed to be in default if Tenant shall commence such cure within said thirty (30)
day  period  and  thereafter  diligently  prosecute  such  cure  to  completion,  which  completion  shall  occur  not  later  than  ninety  (90)
days from the date of such notice from Landlord;

(j)    Tenant shall be involved in financial difficulties as evidenced by an admission in writing by Tenant of Tenant’s
inability to pay its debts generally as they become due, or by the making or offering to make a composition of its debts with its
creditors;

(k)    Tenant shall make an assignment or trust mortgage, or other conveyance or transfer of like nature, of all or a

substantial part of its property for the benefit of its creditors,

(l)    an attachment on mesne process, on execution or otherwise, or other legal process shall issue against Tenant or

its property and a sale of any of its assets shall be held thereunder;

(m)    any judgment, attachment or the like in excess of $1,000,000 shall be entered, recorded or filed against Tenant
in any court, registry, etc. and Tenant shall fail to pay such judgment within thirty (30) days after the judgment shall have become
final  beyond  appeal  or  to  discharge  or  secure  by  surety  bond  such  lien,  attachment,  etc.  within  thirty  (30)  days  of  such  entry,
recording or filing, as the case may be;

(n)    the leasehold hereby created shall be taken on execution or by other process of law and shall not be revested in

Tenant within thirty (30) days thereafter;

(o)    a receiver, sequesterer, trustee or similar officer shall be appointed by a court of competent jurisdiction to take

charge of all or any part of Tenant’s Property and such appointment shall not be vacated within thirty (30) days; and

(p)        any  proceeding  shall  be  instituted  by  or  against  Tenant  pursuant  to  any  of  the  provisions  of  any  Act  of
Congress or State law relating to bankruptcy, reorganizations, arrangements, compositions or other relief from creditors, and, in
the case of any proceeding instituted against it, if Tenant shall fail to have such proceedings dismissed within thirty (30) days or if
Tenant is adjudged bankrupt or insolvent as a result of any such proceeding.

Wherever “Tenant “ is used in subsections (i), (j), (k), (l), (n) or (o) of this Section 20.1, it shall be deemed to include any

parent entity of Tenant and any guarantor of any of Tenant’s obligations under this Lease.

20.2        Remedies.  Upon  an  Event  of  Default,  Landlord  may,  by  notice  to  Tenant,  elect  to  terminate  this  Lease;  and
thereupon (and without prejudice to any remedies which might otherwise be available for arrears of Rent or preceding breach of
covenant  or  agreement  and  without  prejudice  to  Tenant’s  liability  for  damages  as  hereinafter  stated),  upon  the  giving  of  such
notice, this Lease shall terminate as of the date specified therein as though that were the Expiration Date. Upon such termination,
Landlord shall have the right to utilize the Security Deposit or draw down the entire Letter of Credit, as applicable, and apply the
proceeds thereof to its damages hereunder. Without being taken or deemed to be guilty of any manner of trespass or conversion,
and without being liable to indictment, prosecution or damages therefor, Landlord may, by lawful process, enter into and upon the
Premises (or any part thereof in the name of the whole); repossess the same, as of its former estate; and expel Tenant and those
claiming  under  Tenant.  The  words  “re-entry”  and  “re-enter”  as  used  in  this  Lease  are  not  restricted  to  their  technical  legal
meanings.

20.3 Damages - Termination.

(a)    Upon the termination of this Lease under the provisions of this Section 20, Tenant shall pay to Landlord Rent
up to the time of such termination, shall continue to be liable for any preceding breach of covenant, and in addition, shall pay to
Landlord as damages, at the election of Landlord, either:

(i)    the amount (discounted to present value at the rate of five percent (5%) per annum) by which, at the
time  of  the  termination  of  this  Lease  (or  at  any  time  thereafter  if  Landlord  shall  have  initially  elected  damages  under  Section
20.3(a)(ii)  below),  (x)  the  aggregate  of  Rent  projected  over  the  period  commencing  with  such  termination  and  ending  on  the
Expiration Date, exceeds (y) the aggregate projected rental value of the Premises for such period, taking into account a reasonable
time period during which the Premises shall be unoccupied, plus all Reletting Costs (hereinafter defined); or

(ii)        amounts  equal  to  Rent  which  would  have  been  payable  by  Tenant  had  this  Lease  not  been  so
terminated,  payable  upon  the  due  dates  therefor  specified  herein  following  such  termination  and  until  the  Expiration  Date,
provided, however, if Landlord shall re- let the Premises during such period, that Landlord shall credit Tenant with the net rents
received by Landlord from such re-letting, such net rents to be determined by first deducting from the gross

rents as and when received by Landlord from such re-letting the expenses incurred or paid by Landlord in terminating this Lease,
as well as the expenses of re-letting, including altering and preparing the Premises for new tenants, brokers’ commissions, and all
other similar and dissimilar expenses properly chargeable against the Premises and the rental therefrom (collectively, “Reletting
Costs”), it being understood that any such re-letting may be for a period equal to or shorter or longer than the remaining Term; and
provided, further, that (x) in no event shall Tenant be entitled to receive any excess of such net rents over the sums payable by
Tenant to Landlord hereunder and (y) in no event shall Tenant be entitled in any suit for the collection of damages pursuant to this
Section  20.3(a)(ii)  to  a  credit  in  respect  of  any  net  rents  from  a  re-letting  except  to  the  extent  that  such  net  rents  are  actually
received by Landlord prior to the commencement of such suit. If the Premises or any part thereof should be re-let in combination
with other space, then proper apportionment on a square foot area basis shall be made of the rent received from such re- letting and
of the expenses of re-letting.

(b)    In calculating the amount due under Section 20.3(a)(i), above, there shall be included, in addition to the Base
Rent, all other considerations agreed to be paid or performed by Tenant, including without limitation Tenant’s Share of Operating
Costs  and  Taxes,  on  the  assumption  that  all  such  amounts  and  considerations  would  have  increased  at  the  rate  of  three  percent
(3%) per annum for the balance of the full term hereby granted.

(c)    Suit or suits for the recovery of such damages, or any installments thereof, may be brought by Landlord from
time to time at its election, and nothing contained herein shall be deemed to require Landlord to postpone suit until the date when
the Term would have expired if it had not been terminated hereunder.

(d)    Nothing herein contained shall be construed as limiting or precluding the recovery by Landlord against Tenant
of any sums or damages to which, in addition to the damages particularly provided above, Landlord may lawfully be entitled by
reason of any Event of Default hereunder.

(e)    In lieu of any other damages or indemnity and in lieu of full recovery by Landlord of all sums payable under
all  the  foregoing  provisions  of  this  Section  20.3,  Landlord  may,  by  written  notice  to  Tenant,  at  any  time  after  this  Lease  is
terminated  under  any  of  the  provisions  herein  contained  or  is  otherwise  terminated  for  breach  of  any  obligation  of  Tenant  and
before  such  full  recovery,  elect  to  recover,  and  Tenant  shall  thereupon  pay,  as  liquidated  damages,  an  amount  equal  to  the
aggregate of (x) an amount equal to the lesser of (1) Rent accrued under this Lease in the twelve (12) months immediately prior to
such termination, or (2) Rent payable during the remaining months of the Term if this Lease had not been terminated, plus (y) the
amount  of  Rent  accrued  and  unpaid  at  the  time  of  termination,  less  (z)  the  amount  of  any  recovery  by  Landlord  under  the
foregoing provisions of this Section 20.3 up to the time of payment of such liquidated damages.

20.4    Landlord’s Self-Help; Fees and Expenses. If Tenant shall default in the performance of any covenant on Tenant’s
part to be performed in this Lease contained, including without limitation the obligation to maintain the Premises in the required
condition pursuant to Section 10.1 above, Landlord may, upon reasonable advance notice, except that no notice shall be required
in an emergency, immediately, or at any time thereafter, perform the same for the account

of Tenant. Tenant shall pay to Landlord upon demand therefor any costs incurred by Landlord in connection therewith, together
with interest at the Default Rate until paid in full. In addition, Tenant shall pay all of Landlord’s costs and expenses, including
without limitation reasonable attorneys’ fees, incurred (i) in enforcing any obligation of Tenant under this Lease or (ii) as a result
of Landlord or any of the Landlord Parties, without its fault, being made party to any litigation pending by or against any of the
Tenant Parties.

20.5    Waiver of Redemption, Statutory Notice and Grace Periods. Tenant does hereby waive and surrender all rights
and privileges which it might have under or by reason of any present or future Legal Requirements to redeem the Premises or to
have a continuance of this Lease for the Term hereby demised after being dispossessed or ejected therefrom by process of law or
under the terms of this Lease or after the termination of this Lease as herein provided. Except to the extent prohibited by Legal
Requirements, any statutory notice and grace periods provided to Tenant by law are hereby expressly waived by Tenant.

20.6        Landlord’s  Remedies  Not  Exclusive.  The  specified  remedies  to  which  Landlord  may  resort  hereunder  are
cumulative  and  are  not  intended  to  be  exclusive  of  any  remedies  or  means  of  redress  to  which  Landlord  may  at  any  time  be
lawfully entitled, and Landlord may invoke any remedy (including the remedy of specific performance) allowed at law or in equity
as if specific remedies were not herein provided for.

20.7    No Waiver. Landlord’s failure to seek redress for violation, or to insist upon the strict performance, of any covenant
or condition of this Lease, or any of the Rules and Regulations promulgated hereunder, shall not prevent a subsequent act, which
would have originally constituted a violation, from having all the force and effect of an original violation. The receipt by Landlord
of Rent with knowledge of the breach of any covenant of this Lease shall not be deemed a waiver of such breach. The failure of
Landlord to enforce any of such Rules and Regulations against Tenant and/or any other tenant in the Building shall not be deemed
a waiver of any such Rules and Regulations. No provisions of this Lease shall be deemed to have been waived by either party
unless such waiver be in writing signed by such party. No payment by Tenant or receipt by Landlord of a lesser amount than the
Rent herein stipulated shall be deemed to be other than on account of the stipulated Rent, nor shall any endorsement or statement
on any check or any letter accompanying any check or payment as Rent be deemed an accord and satisfaction, and Landlord may
accept  such  check  or  payment  without  prejudice  to  Landlord’s  right  to  recover  the  balance  of  such  Rent  or  pursue  any  other
remedy in this Lease provided.

20.8 Restrictions on Tenant’s Rights. During the continuation of any Event of Default,

25.17 above; and (b) Tenant shall not have the right to make, nor to request Landlord’s consent or approval with respect to, any
Alterations or Transfers.

(a) Landlord shall not be obligated to provide Tenant with any notice pursuant to Sections 1.2 and

20.9 Landlord Default. Notwithstanding anything to the contrary contained in the Lease, Landlord shall in no event be in
default in the performance of any of Landlord’s obligations under this Lease unless Landlord shall have failed to perform such
obligations within thirty (30) days (or such additional time as is reasonably required to correct any such default, provided Landlord
commences cure within 30 days) after notice by Tenant to Landlord properly specifying wherein Landlord has failed to perform
any such obligation. Except as expressly set forth in this

Lease, Tenant shall not have the right to terminate or cancel this Lease or to withhold rent or to set-off or deduct any claim or
damages against rent as a result of any default by Landlord or breach by Landlord of its covenants or any warranties or promises
hereunder, except in the case of a wrongful eviction of Tenant from the Premises (constructive or actual) by Landlord, unless the
same continues after notice to Landlord thereof and an opportunity for Landlord to cure the same as set forth above. In addition,
Tenant shall not assert any right to deduct the cost of repairs or any monetary claim against Landlord from rent thereafter due and
payable under this Lease.

21.

SURRENDER; ABANDONED PROPERTY; HOLD-OVER

21.1

Surrender

(a)        Upon  the  expiration  or  earlier  termination  of  the  Term,  Tenant  shall  (i)  peaceably  quit  and  surrender  to
Landlord the Premises (including without limitation all fixed lab benches, fume hoods, electric, plumbing, heating and sprinkling
systems,  fixtures  and  outlets,  vaults,  paneling,  molding,  shelving,  radiator  enclosures,  cork,  rubber,  linoleum  and  composition
floors, ventilating, silencing, air conditioning and cooling equipment therein, the Generator (if installed), and all other furniture,
fixtures, and equipment that was either provided by Landlord or paid for in whole or in part by any allowance provided to Tenant
by Landlord under this Lease) broom clean, in good order, repair and condition excepting only ordinary wear and tear and damage
by fire or other insured Casualty; (ii) remove all of Tenant’s Property, all autoclaves and cage washers and, to the extent specified
by  Landlord  pursuant  to  Section  11.1(b),  Alterations  made  by  Tenant;  (iii)  remove  the  Landlord’s  Kitchen  Work,  including,
without limitation, all fixtures and equipment, and restore the area in which the kitchen is located to shell condition; and (iv) repair
any damages to the Premises or the Building caused by the installation or removal of Tenant’s Property and/or such Alterations.
Tenant’s obligations under this Section 21.1(a) shall survive the expiration or earlier termination of this Lease.

(b)    Prior to the expiration of this Lease (or within thirty (30) days after any earlier termination), Tenant shall clean
and otherwise decommission all interior surfaces (including floors, walls, ceilings, and counters), piping, supply lines, waste lines,
acid neutralization systems and plumbing in and/or exclusively serving the Premises, and all exhaust or other ductwork in and/or
exclusively  serving  the  Premises,  in  each  case  which  has  carried  or  released  or  been  contacted  by  any  Hazardous  Materials  or
other chemical or biological materials used in the operation of the Premises, and shall otherwise clean the Premises so as to permit
the  Surrender  Plan  (defined  below)  to  be  issued.  At  least  thirty  (30)  days  prior  to  the  expiration  of  the  Term  (or,  if  applicable,
within five (5) business days after any earlier termination of this Lease), Tenant shall deliver to Landlord a reasonably detailed
narrative description of the actions proposed (or required by any Legal Requirements) to be taken by Tenant in order to render the
Premises  (including  any  Alterations  permitted  or  required  by  Landlord  to  remain  therein)  free  of  Hazardous  Materials  and
otherwise  released  for  unrestricted  use  and  occupancy  including  without  limitation  (and  to  the  extent  applicable)  causing  the
Premises  to  be  decommissioned  in  accordance  with  the  regulations  of  the  U.S.  Nuclear  Regulatory  Commission  and/or  the
Massachusetts Department of Public health (the “MDPH”) for the control of radiation, and cause the Premises to be released for
unrestricted use by the Radiation Control Program of the MDPH (the “Surrender Plan”). The Surrender Plan
(i) shall be accompanied by a current list of (A) all Required Permits held by or on behalf of any Tenant Party with respect to
Hazardous Materials in, on, under, at or about the Premises, and (B)

Tenant’s  Hazardous  Materials,  and  (ii)  shall  be  subject  to  the  review  and  approval  of  Landlord’s  environmental  consultant.  In
connection  with  review  and  approval  of  the  Surrender  Plan,  upon  request  of  Landlord,  Tenant  shall  deliver  to  Landlord  or  its
consultant such additional non- proprietary information concerning the use of and operations within the Premises as Landlord shall
request. On or before the expiration of the Term (or within thirty (30) days after any earlier termination of this Lease, during which
period Tenant’s use and occupancy of the Premises shall be governed by Section 21.3 below), Tenant shall deliver to Landlord a
certification from a third party certified industrial hygienist reasonably acceptable to Landlord certifying that the Premises do not
contain  any  Hazardous  Materials  and  evidence  that  the  approved  Surrender  Plan  shall  have  been  satisfactorily  completed  by  a
contractor  acceptable  to  Landlord,  and  Landlord  shall  have  the  right,  subject  to  reimbursement  at  Tenant’s  expense  as  set  forth
below, to cause Landlord’s environmental consultant to inspect the Premises and perform such additional procedures as may be
deemed reasonably necessary to confirm that the Premises are, as of the expiration of the Term (or, if applicable, the date which is
thirty (30) days after any earlier termination of this Lease), free of Hazardous Materials and otherwise available for unrestricted
use  and  occupancy  as  aforesaid.  Landlord  shall  have  the  unrestricted  right  to  deliver  the  Surrender  Plan  and  any  report  by
Landlord’s  environmental  consultant  with  respect  to  the  surrender  of  the  Premises  to  third  parties.  Such  third  parties  and  the
Landlord  Parties  shall  be  entitled  to  rely  on  the  Surrender  Report.  If  Tenant  shall  fail  to  prepare  or  submit  a  Surrender  Plan
approved by Landlord, or if Tenant shall fail to complete the approved Surrender Plan, or if such Surrender Plan, whether or not
approved by Landlord, shall fail to adequately address the use of Hazardous Materials by any of the Tenant Parties in, on, at, under
or about the Premises, Landlord shall have the right to take any such actions as Landlord may deem reasonable or appropriate to
assure that the Premises and the Property are surrendered in the condition required hereunder, the cost of which actions shall be
reimbursed by Tenant as additional rent upon demand. Tenant’s obligations under this Section 21.1(b) shall survive the expiration
or earlier termination of the Term. Notwithstanding the foregoing, the provisions of this Section 21.1(b) shall not be applicable
unless Tenant’s use of the Premises includes laboratory use.

(c)        No  act  or  thing  done  by  Landlord  during  the  Term  shall  be  deemed  an  acceptance  of  a  surrender  of  the
Premises, and no agreement to accept such surrender shall be valid, unless in writing signed by Landlord. Unless otherwise agreed
by the parties in writing, no employee of Landlord or of Landlord’s agents shall have any power to accept the keys of the Premises
prior  to  the  expiration  or  earlier  termination  of  this  Lease.  The  delivery  of  keys  to  any  employee  of  Landlord  or  of  Landlord’s
agents shall not operate as a termination of this Lease or a surrender of the Premises.

(d)    Notwithstanding anything to the contrary contained herein, Tenant shall, at its sole cost and expense, remove
from the Premises, prior to the end of the Term, any item installed by or for Tenant and which, pursuant to Legal Requirements,
must be removed therefrom before the Premises may be used by a subsequent tenant.

21.2    Abandoned Property. After the expiration or earlier termination hereof, if Tenant fails to remove any property from
the Building or the Premises which Tenant is obligated by the terms of this Lease to remove within ten (10) business days after
written notice from Landlord, such property (the “Abandoned Property”) shall be conclusively deemed to have been abandoned,
and may either be retained by Landlord as its property or sold or otherwise disposed

of in such manner as Landlord may see fit. If any item of Abandoned Property shall be sold, Tenant hereby agrees that Landlord
may receive and retain the proceeds of such sale and apply the same, at its option, to the expenses of the sale, the cost of moving
and storage, any damages to which Landlord may be entitled under Section 20 hereof or pursuant to law, and to any arrears of
Rent.

21.3    Holdover. If any of the Tenant Parties holds over (which term shall include, without limitation, the failure of Tenant
or any Tenant Party to perform all of its obligations under Section 21.1 above) after the end of the Term, Tenant shall be deemed a
tenant-at-sufferance  subject  to  the  provisions  of  this  Lease;  provided  that  whether  or  not  Landlord  has  previously  accepted
payments of Rent from Tenant, (i) Tenant shall pay Base Rent at 150% of the highest rate of Base Rent payable during the Term,
(ii) Tenant shall continue to pay to Landlord all additional rent, and (iii) Tenant shall be liable for all damages, including without
limitation  lost  business  and  consequential  damages,  incurred  by  Landlord  as  a  result  of  such  holding  over,  Tenant  hereby
acknowledging  that  Landlord  may  need  the  Premises  after  the  end  of  the  Term  for  other  tenants  and  that  the  damages  which
Landlord  may  suffer  as  the  result  of  Tenant’s  holding  over  cannot  be  determined  as  of  the  Execution  Date.  Nothing  contained
herein shall grant Tenant the right to holdover after the expiration or earlier termination of the Term.

21.4    Warranties. Tenant hereby assigns to Landlord any warranties in effect on the last day of the Term with respect to
any fixtures and Alterations installed in the Premises. Tenant shall provide Landlord with copies of any such warranties prior to
the expiration of the Term (or, if the Lease is earlier terminated, within five (5) days thereafter).

22. MORTGAGEE RIGHTS

22.1        Subordination.  Tenant’s  rights  and  interests  under  this  Lease  shall  be  (i)  subject  and  subordinate  to  any  ground
lease,  overleases,  mortgage,  deed  of  trust,  or  similar  instrument  covering  the  Premises,  the  Building  and/or  the  Land  and  to  all
advances,  modifications,  renewals,  replacements,  and  extensions  thereof  (each  of  the  foregoing,  a  “Mortgage”),  or  (ii)  if  any
Mortgagee elects, prior to the lien of any present or future Mortgage. Landlord shall obtain an SNDA, as hereinafter defined, from
the holder of any future Mortgage which affects the Property. An “SNDA” shall be defined as a subordination, non-disturbance
and attornment agreement on the standard form of SNDA then being used by the holder of the Mortgage in question, with such
commercially reasonable modifications as may be requested by Tenant. Tenant further shall attorn to and recognize any successor
landlord,  whether  through  foreclosure  or  otherwise,  as  if  the  successor  landlord  were  the  originally  named  landlord.  The
provisions of this Section 22.1 shall be self-operative and no further instrument shall be required to effect such subordination or
attornment;  however,  Tenant  agrees  to  execute,  acknowledge  and  deliver  such  instruments,  confirming  such  subordination  and
attornment in such form as shall be requested by any such holder within fifteen (15) days of request therefor. Landlord represents
that the Property is not encumbered by a Mortgage as of the date of this Lease.

22.2        Notices.  Tenant  shall  give  each  Mortgagee  the  same  notices  given  to  Landlord  concurrently  with  the  notice  to
Landlord, and each Mortgagee shall have a reasonable opportunity thereafter to cure a Landlord default, and Mortgagee’s curing
of any of Landlord’s default shall be treated as performance by Landlord.

22.3        Mortgagee  Consent.  Tenant  acknowledges  that,  where  applicable,  any  consent  or  approval  hereafter  given  by
Landlord may be subject to the further consent or approval of a Mortgagee; and the failure or refusal of such Mortgagee to give
such consent or approval shall, notwithstanding anything to the contrary in this Lease contained, constitute reasonable justification
for Landlord’s withholding its consent or approval.

22.4    Mortgagee Liability. Tenant acknowledges and agrees that if any Mortgage shall be foreclosed, (a) the liability of
the Mortgagee and its successors and assigns shall exist only so long as such Mortgagee or purchaser is the owner of the Premises,
and such liability shall not continue or survive after further transfer of ownership; and (b) such Mortgagee and its successors or
assigns  shall  not  be  (i)  liable  for  any  act  or  omission  of  any  prior  lessor  under  this  Lease;  (ii)  liable  for  the  performance  of
Landlord’s covenants pursuant to the provisions of this Lease which arise and accrue prior to such entity succeeding to the interest
of Landlord under this Lease or acquiring such right to possession; (iii) subject to any offsets or defense which Tenant may have at
any time against Landlord; (iv) bound by any base rent or other sum which Tenant may have paid previously for more than one (1)
month; or (v) liable for the performance of any covenant of Landlord under this Lease which is capable of performance only by
the original Landlord.

23.

QUIET ENJOYMENT.

Landlord covenants that so long as Tenant keeps and performs each and every covenant, agreement, term, provision and
condition herein contained on the part and on behalf of Tenant to be kept and performed, Tenant shall peaceably and quietly hold,
occupy and enjoy the Premises during the Term from and against the claims of all persons lawfully claiming by, through or under
Landlord subject, nevertheless, to the covenants, agreements, terms, provisions and conditions of this Lease, any matters of record
or of which Tenant has knowledge and to any Mortgage to which this Lease is subject and subordinate, as hereinabove set forth.

24.

NOTICES.

Any notice, consent, request, bill, demand or statement hereunder (each, a “Notice”) by either party to the other party shall
be in writing and shall be deemed to have been duly given when either delivered by hand or by nationally recognized overnight
courier (in either case with evidence of delivery or refusal thereof) addressed as follows:

If to Landlord:

With a copy to:

if to Tenant:

HCP/King 75 Hayden LLC c/o King
Street Properties
800 Boylston Street, Suite 1570
Boston, MA 02199 Attention: Stephen
D. Lynch
Goulston & Storrs PC 400 Atlantic
Avenue
Boston, MA 02110 Attention: King
Street
Dicerna Pharmaceuticals, Inc. 33
Hayden Avenue
Lexington, MA 02421

With a copy to:

Attention: David W. Miller PhD, SVP

Foley Hoag LLP
155 Seaport Boulevard
Boston, MA 02210
Attention: Real Estate Department

Notwithstanding the foregoing, any notice from Landlord to Tenant regarding ordinary business operations (e.g., exercise
of a right of access to the Premises, maintenance activities, invoices, etc.) may also be given by written notice delivered to any
person at the Premises whom Landlord reasonably believes is authorized to receive such notice on behalf of Tenant without copies
as specified above. Either party may at any time change the address or specify an additional address for such Notices by delivering
or mailing, as aforesaid, to the other party a notice stating the change and setting forth the changed or additional address, provided
such  changed  or  additional  address  is  within  the  United  States.  Notices  shall  be  effective  upon  the  date  of  receipt  or  refusal
thereof.

25. MISCELLANEOUS

25.1    Separability. If any provision of this Lease or portion of such provision or the application thereof to any person or
circumstance is for any reason held invalid or unenforceable, the remainder of this Lease (or the remainder of such provision) and
the application thereof to other persons or circumstances shall not be affected thereby.

25.2    Captions. The captions are inserted only as a matter of convenience and for reference, and in no way define, limit or

describe the scope of this Lease nor the intent of any provisions thereof.

25.3    Broker. Tenant and Landlord each warrants and represents that it has dealt with no broker in connection with the
consummation of this Lease other than T3 Advisors and JLL New England (collectively, “Broker”). Tenant and Landlord each
agrees to defend, indemnify and save the other harmless from and against any Claims arising in breach of the representation and
warranty set forth in the immediately preceding sentence. Landlord shall be solely responsible for the payment of any brokerage
commissions to Broker.

25.4    Entire Agreement. This Lease, Lease Summary Sheet and Exhibits 1-12 attached hereto and  incorporated  herein
contain  the  entire  and  only  agreement  between  the  parties  and  any  and  all  statements  and  representations,  written  and  oral,
including previous correspondence and agreements between the parties hereto, are merged herein. Tenant acknowledges that all
representations and statements upon which it relied in executing this Lease are contained herein and that Tenant in no way relied
upon any other statements or representations, written or oral. This Lease may not be modified orally or in any manner other than
by written agreement signed by the parties hereto.

25.5    Governing Law. This Lease is made pursuant to, and shall be governed by, and construed in accordance with, the
laws of the Commonwealth of Massachusetts and any applicable local municipal rules, regulations, by-laws, ordinances and the
like.

 
25.6       Representation of Authority. By his or her execution hereof, each of the signatories on behalf of the respective
parties hereby warrants and represents to the other that he or she is duly authorized to execute this Lease on behalf of such party.
Upon Landlord’s request, Tenant shall provide Landlord with evidence that any requisite resolution, corporate authority and any
other necessary consents have been duly adopted and obtained.

25.7 Expenses Incurred by Landlord Upon Tenant Requests.

(a)        Tenant  shall,  upon  demand,  reimburse  Landlord  for  all  reasonable  expenses,  including,  without  limitation,
legal  fees,  incurred  by  Landlord  in  connection  with  all  requests  by  Tenant  for  consents,  approvals  or  execution  of  collateral
documentation  related  to  this  Lease,  including,  without  limitation,  costs  incurred  by  Landlord  in  the  review  and  approval  of
Tenant’s plans and specifications in connection with proposed Alterations to be made by Tenant to the Premises or in connection
with requests by Tenant for Landlord’s consent to make a Transfer. Such costs shall be deemed to be additional rent under this
Lease.

25.8    Survival. Without limiting any other obligation of Tenant which may survive the expiration or prior termination of
the Term, all obligations on the part of Tenant to indemnify, defend, or hold Landlord harmless, as set forth in this Lease shall
survive the expiration or prior termination of the Term.

25.9       Limitation of Liability. Tenant shall neither assert nor seek to enforce any claim against Landlord or any of the
Landlord Parties, or the assets of any of the Landlord Parties, for breach of this Lease or otherwise, other than against Landlord’s
interest in the Building and in the uncollected rents, issues and profits thereof, and Tenant agrees to look solely to such interest for
the  satisfaction  of  any  liability  of  Landlord  under  this  Lease.  This  Section  25.9(a)  shall  not  limit  any  right  that  Tenant  might
otherwise have to obtain injunctive relief against Landlord. Landlord and Tenant specifically agree that in no event shall any
officer, director, trustee, employee or representative of Landlord or any of the other Landlord Parties ever be personally
liable  for  any  obligation  under  this  Lease,  nor  shall  Landlord  or  any  of  the  other  Landlord  Parties  be  liable  for
consequential or incidental damages or for lost profits whatsoever in connection with this Lease.

25.10    Binding Effect. The covenants, agreements, terms, provisions and conditions of this Lease shall bind and benefit
the successors and assigns of the parties hereto with the same effect as if mentioned in each instance where a party hereto is named
or referred to, except that no violation of the provisions of Section 13 hereof shall operate to vest any rights in any successor or
assignee of Tenant.

25.11    Landlord Obligations upon Transfer. Upon any sale, transfer or other disposition of the Building, Landlord shall
be entirely freed and relieved from the performance and observance thereafter of all covenants and obligations hereunder on the
part  of  Landlord  to  be  performed  and  observed,  it  being  understood  and  agreed  in  such  event  (and  it  shall  be  deemed  and
construed as a covenant running with the land) that the person succeeding to Landlord’s ownership of said reversionary interest
shall thereupon and thereafter assume, and perform and observe, any and all of such covenants and obligations of Landlord, except
as otherwise agreed in writing.

25.12    No Grant of Interest. Tenant shall not grant any interest whatsoever in any fixtures within the Premises or any

item paid in whole or in part by Landlord’s Contribution or by Landlord.

25.13        Financial  Information.  Tenant  shall  deliver  to  Landlord,  within  thirty  (30)  days  after  Landlord’s  reasonable
request,  Tenant’s  most  recently  completed  balance  sheet  and  related  statements  of  income,  shareholder’s  equity  and  cash  flows
statements (audited if available) reviewed by an independent certified public accountant and certified by an officer of Tenant as
being true and correct in all material respects. Any such financial information may be relied upon by any actual or potential lessor,
purchaser, or mortgagee of the Property or any portion thereof. The Landlord acknowledges that Tenant is subject to the reporting
obligations imposed on it pursuant to the Securities Exchange Act of 1934, as amended (the “34 Act”), and, as such, the Tenant’s
audited  financial  statements  are  readily  available  to  the  Landlord  and  the  general  public.  Accordingly,  Tenant  shall  not  be
obligated  to  provide  Landlord  with  any  of  the  information  requested  in  this  Section  25.13  for  so  long  as  Tenant  is  meeting  its
disclosure obligations under the 34 Act.

of 

list 

“Specially 

25.14       OFAC Certificate and Indemnity.  Executive  Order  No.  13224  on  Terrorist  Financing,  effective  September  24,
2001 (the “Executive Order”), and the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept
and  Obstruct  Terrorism  Act  of  2001  (Public  Law  10756,  the  “Patriot  Act”)  prohibit  certain  property  transfers.  Tenant  hereby
represents and warrants to Landlord (which representations and warranties shall be deemed to be continuing and re-made at all
times during the Term) that neither Tenant nor any stockholder, manager, beneficiary, partner, or principal of Tenant is subject to
the Executive Order, that none of them is listed on the United States Department of the Treasury Office of Foreign Assets Control
(“OFAC”) list of “Specially Designated Nationals and Blocked Persons” as modified from time to time, and that none of them is
otherwise subject to the provisions of the Executive Order or the Patriot Act, provided that so long as Tenant’s shares of stock are
publicly traded, Tenant makes no representation or warranty with respect to the ownership of any such shares of stock. The most
current 
at
http://www.treas.gov/offices/eotffc/ofac/sdn/index.html. Tenant shall from time to time, within ten days after request by Landlord,
deliver  to  Landlord  any  certification  or  other  evidence  requested  from  time  to  time  by  Landlord  in  its  reasonable  discretion,
confirming Tenant’s compliance with these provisions. No assignment or subletting, other than a Related Party Transfer, shall be
effective  unless  and  until  the  assignee  or  subtenant  thereunder  delivers  to  Landlord  written  confirmation  of  such  party’s
compliance  with  the  provisions  of  this  subsection,  in  form  and  content  satisfactory  to  Landlord.  If  for  any  reason  the
representations and warranties set forth in this subsection, or any certificate or other evidence of compliance delivered to Landlord
hereunder, is untrue in any respect when made or delivered, or thereafter becomes untrue in any respect, then an event of default
hereunder shall be deemed to occur immediately, and there shall be no opportunity to cure. Tenant shall indemnify, defend with
counsel  reasonably  acceptable  to  Landlord,  and  hold  Landlord  harmless  from  and  against,  any  and  all  liabilities,  losses  claims,
damages,  penalties,  fines,  and  costs  (including  attorneys’  fees  and  costs)  arising  from  or  related  to  the  breach  of  any  of  the
foregoing representations, warranties, and duties of Tenant. The provisions of this subsection shall survive the expiration or earlier
termination of this Lease for the longest period permitted by law.

Designated 

Nationals 

Persons” 

Blocked 

found 

and 

can 

be 

25.15    Confidentiality. Tenant acknowledges and agrees that the terms of this Lease are confidential. Disclosure of the
terms hereof could adversely affect the ability of Landlord to negotiate other leases with respect to the Building and may impair
Landlord’s  relationship  with  other  tenants  of  the  Building.  Tenant  agrees  that  it  and  its  partners,  officers,  directors,  employees,
brokers, and attorneys, if any, shall not disclose the terms and conditions of this Lease to any other person or entity without the
prior written consent of Landlord which may be given or withheld by Landlord, in Landlord’s sole discretion, except as required
for financial disclosures or securities filings, as required by the order of any court or public body with authority over Tenant, or in
connection  with  any  litigation  between  Landlord  and  Tenant  with  respect  this  Lease.  It  is  understood  and  agreed  that  damages
alone would be an inadequate remedy for the breach of this provision by Tenant, and Landlord shall also have the right to seek
specific performance of this provision and to seek injunctive relief to prevent its breach or continued breach. Notwithstanding the
foregoing, Landlord understands and acknowledges that Tenant is required to publicly disclose this Lease as a material agreement
under the 34 Act and that making such required disclosure does not and shall not result in a breach of this Section 25.15 by Tenant.

25.16        Force Majeure.  Other  than  for  Tenant’s  obligations  under  this  Lease  that  can  be  performed  by  the  payment  of
money (e.g., payment of Rent and maintenance of insurance), whenever a period of time is herein prescribed for action to be taken
by either party hereto, such party shall not be liable or responsible for, and there shall be excluded from the computation of any
such  period  of  time,  any  delays  due  to  strikes,  riots,  acts  of  God,  shortages  of  labor  or  materials,  war,  acts  of  terrorism,
governmental laws, regulations, or restrictions, or any other causes of any kind whatsoever which are beyond the control of such
party (collectively “Force Majeure”). In no event shall financial inability of a party be deemed to be Force Majeure.

25.17 Right of First Offer.

(a)    Grant of Option; Conditions. Tenant shall have the one time right of first offer (the “Right of First Offer”)
with respect to any available space on the third (3rd) floor of the Building (the "Offering Space"). Notwithstanding anything to the
contrary  contained  herein,  no  portion  of  the  Offering  Space  shall  be  deemed  available  until  each  such  portion  of  the  Offering
Space has been leased to a third party and thereafter Landlord determines that such third party tenant of such Offering Space will
vacate such Offering Space. Tenant’s Right of First Offer shall be exercised, if at all, as follows: at any time after Landlord has
determined that the existing tenant in the Offering Space will not extend or renew the term of its lease for the Offering Space (but
prior to leasing such Offering Space to a party other than the existing tenant), Landlord shall advise Tenant (the "Advice") of the
terms under which Landlord is prepared to lease the Offering Space to Tenant for the remainder of the Term, which terms shall
reflect the Prevailing Market (hereinafter defined) rate for such Offering Space as reasonably determined by Landlord. Tenant may
lease such Offering Space in its entirety only, under such terms, by delivering written notice of exercise to Landlord (the "Notice
of Exercise") within 10 business days after the date of the Advice, except that Tenant shall have no such Right of First Offer and
Landlord need not provide Tenant with an Advice, if:

otherwise deliver the Advice; or

(i)    Tenant is in default under the Lease beyond any applicable cure periods at the time that Landlord would

13 of the Lease) at the time Landlord would otherwise deliver the Advice; or

(ii)    the Premises, or any portion thereof, is sublet (other than pursuant to a Transfer, as defined in Article

to the date Landlord would otherwise deliver the Advice; or

(iii)    the Lease has been assigned (other than pursuant to a Transfer described in Section 13.7 above) prior

(iv)    Tenant is not occupying 60% or more of the Premises on the date Landlord would otherwise deliver

the Advice; or

during the Term; or

(v)

the Offering Space is not intended for the exclusive use of Tenant

the existing tenant in the Offering Space is interested in extending
or renewing its lease for the Offering Space or entering into a new lease for such Offering Space.

(vi)

(b)

Terms for Offering Space.

(i)    The term for the Offering Space shall commence upon the commencement date stated in the Advice
and thereupon such Offering Space shall be considered a part of the Premises, provided that all of the terms stated in the Advice
shall govern Tenant's leasing of the Offering Space and only to the extent that they do not conflict with the Advice, the terms and
conditions of this Lease shall apply to the Offering Space.

(ii)    Tenant shall pay Base Rent and additional rent for the Offering Space in accordance with the terms and
conditions of the Advice, which terms and conditions shall reflect the Prevailing Market rate for the Offering Space as determined
in Landlord's reasonable judgment; provided, however, that in no event shall the Base Rent and additional rent be less than the
Base Rent and additional rent Tenant is then paying for the Premises.

(iii)    The Offering Space (including improvements and personalty, if any) shall be accepted by Tenant in its
condition and as-built configuration existing on the earlier of the date Tenant takes possession of the Offering Space or as of the
date  the  term  for  such  Offering  Space  commences,  unless  the  Advice  specifies  any  work  to  be  performed  by  Landlord  in  the
Offering  Space,  in  which  case  Landlord  shall  perform  such  work  in  the  Offering  Space.  If  Landlord  is  delayed  in  delivering
possession  of  the  Offering  Space  due  to  the  holdover  or  unlawful  possession  of  such  space  by  any  party,  Landlord  shall  use
reasonable efforts to obtain possession of the space, and the commencement of the term for the Offering Space shall be postponed
until the date Landlord delivers possession of the Offering Space to Tenant free from occupancy by any party.

(c)    Termination of Right of First Offer. The rights of Tenant hereunder with respect to the Offering Space shall
terminate  on  the  earlier  to  occur  of:  (i)  the  date  that  is  two  (2)  years  before  the  Expiration  Date  (unless  Tenant  simultaneously
exercises its right, if any, to extend the Term as set forth in Section 1.2 above); (ii) Tenant's failure to exercise its Right of First
Offer within the 5-day period provided in Section A above; and (iii) the date Landlord would have

provided Tenant an Advice if Tenant had not been in violation of one or more of the conditions set forth in Section A above.

(d)    Offering Amendment. If Tenant exercises its Right of First Offer, Landlord shall prepare an amendment (the
"Offering  Amendment")  adding  the  Offering  Space  to  the  Premises  on  the  terms  set  forth  in  the  Advice  and  reflecting  the
changes in the Base Rent, Rentable Square Footage of the Premises, Tenant's Pro Rata Share and other appropriate terms. A copy
of  the  Offering  Amendment  shall  be  sent  to  Tenant  within  a  reasonable  time  after  Landlord’s  receipt  of  the  Notice  of  Exercise
executed by Tenant, and Tenant shall execute and return the Offering Amendment to Landlord within 10 business days thereafter,
but  an  otherwise  valid  exercise  of  the  Right  of  First  Offer  shall  be  fully  effective  whether  or  not  the  Offering  Amendment  is
executed.

(e)        Definition  of  Prevailing  Market.  For  purposes  of  this  Right  of  First  Offer  provision,  “Prevailing  Market”
shall  mean  the  annual  rental  rate  per  square  foot  for  space  comparable  to  the  Offering  Space  in  the  Building  and  combination
laboratory  and  office  buildings  comparable  to  the  Building  in  the  Market  Area  (as  defined  in  Section  1.2(b))  under  leases  and
renewal  and  expansion  amendments  being  entered  into  at  or  about  the  time  that  Prevailing  Market  is  being  determined,  giving
appropriate consideration to tenant concessions, brokerage commissions, tenant improvement allowances, existing improvements
in the space in question, and the method of allocating operating expenses and taxes. Notwithstanding the foregoing, space leased
under any of the following circumstances shall not be considered to be comparable for purposes hereof: (i) the lease term is for
less than the lease term of the Offering Space, (ii) the space is encumbered by the option rights of another tenant, or (iii) the space
has a lack of windows and/or an awkward or unusual shape or configuration. In no event shall the Prevailing Market rate be lower
than the per square foot rate that Tenant is paying for the original Premises. The foregoing is not intended to be an exclusive list of
space that will not be considered to be comparable.

[SIGNATURES ON FOLLOWING PAGE]

IN WITNESS WHEREOF the parties hereto have executed this Lease as a sealed instrument as of the Execution Date.

LANDLORD

HCP/KING 75 HAYDEN LLC,
a Delaware limited liability company

By:

King Mattingly LLC, a Massachusetts limited liability company, its Manager

By:

King Street Properties Investments LLC, a Massachusetts limited liability company, its Manager

By: /s/ Stephen D. Lynch
‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑

Name: Stephen D. Lynch    · Its Manager

TENANT

DICERNA PHARMACEUTICALS, INC.,

By: /s/ John B. Green
‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑‑

Name: John B. Green    · Title: Chief Financial Officer

60

EXHIBIT 1A

LEASE PLAN – PRIME PREMISES – 4TH FLOOR

LEASE PLAN – PH SYSTEM PREMISES – 1ST FLOOR

EXHIBIT 1B

LEASE PLAN –STORAGE PREMISES – 1ST FLOOR

EXHIBIT 1C

LEASE PLAN – PENTHOUSE EQUIPMENT PREMISES AND GENERATOR AREA

EXHIBIT 1D

Exhibit 1D, Page 1

Building 75:

EXHIBIT 2A

LEGAL DESCRIPTION - LAND

A certain portion of land in the Town of Lexington, Middlesex County, and Commonwealth of Massachusetts, being shown as
“Expansion Unit Development Area = 286,017 Square Feet 6.566+/- Acres on a plan entitled, “The Hayden Science Center
Condominium, Condominium Site Plan,” dated April 4, 2017, by Feldman Land Surveyors, (the “Plan”),and being more
particularly described as follows:

Commencing at the northwesterly corner of Parcel One, also being the northeasterly corner of Parcel Three, (being shown on the
Plan as “POC-E”);

thence running S 02°20’56” W, a distance of 76.99 feet to a point;

thence turning and running N 87°03’28” W, a distance of 12.00 feet to the point of beginning (being shown on the Plan as “POB-
E”);

thence turning and running S 87°03’28” E, a distance of 693.77 feet to a point of curvature;

thence running along a curve to the right having a radius of 310.00 feet, an arc length of 466.24 feet, a chord bearing of S
43°58’17” E, and a chord distance of 423.52 feet to a point;

thence turning and running N 87°39’04” W, a distance of 661.94 feet to a point; thence turning and running S 28°10’16” W, a

distance of 38.74 feet to a point; thence turning and running N 87°39’04” W, a distance of 321.21 feet to a point;

thence turning and running N 02°20’56” E, a distance of 334.55 feet to the point of beginning. Said portion of land contains an
area of 286,017 square feet, or 6.566 acres, more or less.

Real property in the Town of Lexington, County of Middlesex, Commonwealth of Massachusetts, described as follows:

EXHIBIT 2B LEGAL DESCRIPTION

Parcel One (45 & 55 Hayden Avenue):

A certain parcel of land in the Commonwealth of Massachusetts, County of Middlesex, Town of Lexington, and shown as Lot 2 on
a plan entitled “Plan of Land in Lexington, Mass. (Middlesex County),” dated March 27, 1998, recorded October 6, 1998, with
Middlesex  South  Registry  of  Deeds  as  Plan  No.  1088  of  1998  in  Book  29190,  Page  447,  prepared  by  Beals  and  Thomas,  Inc.,
more particularly bounded and described as follows:

Beginning  at  the  most  southwesterly  corner  of  the  premises,  at  the  southeasterly  corner  of  Lot  1  as  shown  on  said  plan,  then
running:

N 02° 20’ 56” E 180.68 feet to a point, thence turning and running; N 87° 39” 04” W 40.00 feet to a point, thence turning and

running; N 02° 20’ 56” E 122.19 feet to a point, thence turning and running; N 87° 39’ 04” E 40.00 feet to a point, thence turning

and running;

N 02° 20’ 56” E 547.13 feet to a point, thence turning and running, said last five courses being bounded by Lot 1, as shown on
said plan, thence turning and running;

S 87° 36’ 20” E 1,330.04 feet to a point of curvature, thence running;

Northeasterly to a curve to the left having a radius of 135.00 feet and a length of 58.90 feet to a point of tangency, thence running;

N 67° 23’ 52” E 146.89 feet to a point, thence turning and running;

S 03° 52’ 06” E 111.25 feet to a point, said last four courses being bounded by land now or formerly of the Town of Lexington,
thence turning and running;

S 44° 07’ 54 W 561.19 feet to a point, thence turning and running;

S 22° 29’ 38” E 435.76 feet to a point, said last two courses are bounded in part by land now or formerly the Town of Lexington
and, in part now or formerly of Hayden Office Trust, thence running;

Southwesterly  by  a  curve  to  the  right,  having  a  radius  of  985.00  feet  and  a  length  of  12.11  feet  to  a  point  of  tangency,  thence
turning and running;

N 87° 36’ 20” W 1,329.27 feet to the point of beginning, said last two courses being bounded by the northerly sideline of Hayden
Avenue.

Containing 1,123,722 square feet more or less, or 25.797 acres, more or less. A portion of said Lot 2 is registered land, described

as follows:

Lot 293 on Land Court Plan 19485 N as approved by the Land Court and filed in the Land Registration Office; and

Lots 10 and 11 on Land Court Plan 16660 O as approved by the Land Court and filed with the Land Registration Office.

Parcel Two (Appurtenant Easements - 45 & 55 Hayden Avenue):

A.

B.

C.

D.

E.

F.

There is appurtenant to the above described Lot 11 the right and easement to use the drainage ditch running from west to
east across the northerly portion of Lot 10, shown on said plan, as set forth in Registered Document No. 517903.

There  is  appurtenant  to  the  above  described  Lot  11  rights  and  easements  for  sewer  purposes  as  set  forth  in  Registered
Document No. 479201.

There is appurtenant to said Lot 293 the benefits of the agreement and reservation as to trunk sewer more particularly set
forth in deed filed as Document No. 479738.

Lot  10  has  the  benefit  of  a  reservation  in  the  strip  of  land  marked  sewer  easement  as  shown  on  said  plan,  set  forth  in
Document  517903  and  the  rights  and  easements  for  sewer  purposes  as  set  forth  in  Registered  Document  No.  479201,
insofar as applicable.

Together with the benefit of the appurtenant easements over Lot B shown on plan entitled “A Compiled Plan of Land in
Lexington, Mass.” Dated August 27, 1970, by John J. McSweeney, recorded with Middlesex South District Deeds in Book
11928,  Page  614,  as  shown  on  said  plan,  as  reserved  in  a  taking  by  the  Town  of  Lexington  dated  November  30,  1970,
recorded with said Deeds in Book 11928, Page 611, and in a deed from George H. Crawford to the Town of Lexington of
the said Lot B dated December 7, 1970, recorded with said Deeds in Book 11928, Page 614.

Together  with  the  benefit  of  the  appurtenant  easements  set  forth  in  Declaration  of  Covenants  and  Easements  dated
September 18, 1998 filed as Document No. 1084070 and recorded in Book 29287, Page 189; as affected by Amended and
Restated Declaration of Covenants and Easements dated November 8, 1999, filed as Document No. 1123738, and recorded
in  Book  30855,  Page  323;  as  affected  by  First  Amendment  to  Amended  and  Restated  Declaration  of  Covenants  and
Easements dated March 26, 2002, filed as Document No. 1261521, recorded in Book 37256, Page 364.

Parcel Three (65 Hayden Avenue):

That certain parcel of land situate in Lexington in the County of Middlesex and Commonwealth of Massachusetts shown as Lot
292 on Land Court Plan No. 19485-N.

All of said boundaries are determined by the Court to be located as shown on a subdivision plan, as approved by the Court, filed in
the  Land  Registration  Office,  a  copy  of  which  is  filed  in  the  Registry  of  Deeds  for  the  South  Registry  District  of  Middlesex
County in Registration Book 1178 Page 11.

Parcel Four (Appurtenant Easements - 65 Hayden Avenue):

There is appurtenant to said Lot 292 the right to use the whole of Grassland Street and Valleyfield Street as shown on the plan
Registered in the Registration Book 383 Page 149 in common with others entitled thereto; the right to use all streets or roads as
shown on the plan Registered in Registration Book 506 Page 153, in common with all others legally entitled thereto; the benefit of
the agreement and reservation as to trunk sewer more particularly set forth in the deed Registered as Document No. 479738; and
the benefit of the appurtenant easements set forth in Declaration of Covenants and Easements dated September 18, 1998 filed as
Document No. 1084070 and recorded in Book 29287, Page 189; as affected by Amended and Restated Declaration of Covenants
and Easements dated November 8, 1999, filed as Document No. 1123738, and recorded in Book 30855, Page 323; as affected by
First Amendment to Amended and Restated Declaration of Covenants and Easements dated March 26, 2002, filed as Document
No. 1261521, recorded in Book 37256, Page 364.

EXHIBIT 3 PARKING AREAS

EXHIBIT 4 WORK LETTER

This Exhibit is attached to and made a part of the Lease (the “Lease”) by and between HCP/KING
75  HAYDEN  LLC,  a  Delaware  limited  liability  company  (“Landlord”),  and  DICERNA  PHARMACEUTICALS,  INC.,  a
Delaware corporation (“Tenant”), for space located at 75 Hayden Avenue, Lexington, Massachusetts. Capitalized terms used but
not defined herein shall have the meanings given in the Lease.

This  Work  Letter  shall  set  forth  the  obligations  of  Landlord  and  Tenant  with  respect  to  the  improvements  to  be  performed  in
preparing the Premises for Tenant’s use. This Exhibit shall not be deemed applicable to any additional space added to the Premises
at any time or from time to time, whether by any options under the Lease or otherwise, or to any portion of the original Premises
or any additions to the Premises in the event of a renewal or extension of the original Term of the Lease, whether by any options
under the Lease or otherwise, unless expressly so provided in the Lease or any amendment or supplement to the Lease.

1.

Definitions.

(a)

This Work Letter shall set forth the obligations of Landlord and Tenant with respect to the improvements to be
performed in the Premises for Tenant’s use. For the purposes of this Lease, “Landlord’s Work” consists of: (i) the Base Building
Work described on Exhibit 4-1, which shall be completed as Landlord’s sole cost and expense, (ii) the Tenant Improvement Work,
as hereinafter defined, and (iii) the Landlord’s Kitchen Work, as hereinafter defined, which along with the Tenant Improvement
Work shall be completed at Landlord’s cost but subject to Landlord’s Contribution, as hereinafter defined; and “Tenant’s Work”
consists of the construction and/or installation, at Tenant’s sole cost and expense, all of Tenant’s furniture, fixtures and equipment,
Tenant’s  Security  System  Work,  all  telephone  and  data  wiring  throughout  the  Premises,  and  other  equipment  Tenant  intends  to
install  in  connection  with  the  initial  preparation  of  the  Premises  for  Tenant’s  occupancy  (including,  without  limitation,  any
equipment,  alarms,  audio  visual  equipment  and  wiring,  white  noise  equipment  and  wiring,  and  UPS).  A  matrix  specifying  the
responsibility and schedule for the performance of the Landlord’s Work and Tenant’s Work is attached hereto as Exhibit 4-2. The
“Tenant Improvement Work” consists of the items listed on Exhibit 4-2 (Tenant/Landlord Responsibility Matrix) as “Landlord”
(except  to  the  extent  included  in  the  Base  Building  Work).  Without  limiting  the  generality  of  the  foregoing,  the  Tenant
Improvement Work does not include the Landlord’s Kitchen Work. The parties intend that Tenant Improvement Work will be in
accordance  with  construction  documents  (the  “Construction  Documents”)  prepared  by  Landlord  and  approved  by  Tenant  in
accordance with this Exhibit 4 (which Construction Documents shall include sufficient detail with respect to finishes selected by
Tenant  and  engineering  of  the  mechanical,  electrical,  and  plumbing  systems  to  be  completed  by  the  Contractor  so  as  to  be
submitted for a building permit). The Construction Documents shall be based upon a space plan and design development plans to
be prepared by Tenant (collectively, the “DD Plans”), which DD Plans shall be delivered to Landlord on or before February 1,
2020. A schematic plan showing the general layout of the Tenant Improvement Work is attached hereto as Exhibit 4-3; the DD
Plans are anticipated to be materially consistent with the schematic plan attached hereto as Exhibit 4-3.

Exhibit 4, Page 1

(b)

The “Landlord’s Kitchen Work” consists of the construction of a commissary kitchen within the Premises (the
“Kitchen”), based on design plans (“Kitchen DD Plans”) to be prepared by Tenant and submitted to Landlord for its approval
(said  approval  not  to  be  unreasonably  withheld,  conditioned  or  delayed).  The  Landlord’s  Kitchen  Work  will  be  performed  by
Landlord  based  on  a  mutually  agreeable  timeline  and  schedule  to  be  jointly  determined  by  Landlord  and  Tenant  following
approval  of  the  Kitchen  DD  Plans,  provided  that  Landlord  and  Tenant  acknowledge  and  agree  that  the  performance  of  the
Landlord’s Kitchen Work shall be separate and distinct from Landlord’s performance of the Tenant Improvement Work, and that
such timeline and schedule for the Landlord’s Kitchen Work may provide for the Landlord’s Kitchen Work to commence after the
Substantial  Completion  of  the  Tenant  Improvement  Work;  provided,  however,  (i)  Landlord  shall  use  reasonable  and  diligent
efforts to complete the Landlord’s Kitchen Work on the mutually agreed upon timeline, (ii) portions of Landlord’s Kitchen Work
may be performed concurrently with the Tenant Improvement Work, in Landlord’s discretion; and (iii) Landlord’s performance of
the Landlord’s Kitchen Work after the Term Commencement Date shall be performed in a manner so as to minimize interference
with Tenant’s use of the balance of the Premises (including, performing any noisy, dusty or other disruptive work outside Tenant’s
normal  business  hours).  Upon  Landlord’s  approval  of  the  Kitchen  DD  Plans  for  the  Landlord’s  Kitchen  Work,  Landlord  shall
prepare  and  Tenant  shall  approve  construction  documents  for  the  Landlord’s  Kitchen  Work  (the  “Kitchen  CDs”)  in  the  same
manner as applicable to the Tenant Improvement Work.

(c)

Landlord agrees to reimburse Tenant up to $9,192.30 (the “Space Planning Allowance”) for the preparation of
the  DD  Plans  and  the  Kitchen  DD  Plans,  and  any  unused  portion  of  the  Space  Planning  Allowance  shall  be  added  to  the
Landlord’s  Contribution  (as  defined  below).  Landlord  and  Tenant  acknowledge  that  the  Construction  Documents  have  not  yet
been  prepared  and,  therefore,  it  is  impossible  to  determine  the  exact  cost  of  the  Tenant  Improvement  Work  at  this  time.
Accordingly,  Landlord  and  Tenant  agree  that  Landlord’s  obligation  to  pay  for  the  Cost  of  Tenant  Improvement  Work,  as
hereinafter defined shall be limited to an amount (“Landlord’s Contribution”) which shall not exceed $6,128,200 (i.e., $100.00
per rentable square foot of the Premises) (the “Maximum Amount”) and that Tenant shall be responsible for the Cost of Tenant
Improvement  Work  to  the  extent  that  it  exceeds  the  Maximum  Amount.  The  “Cost  of  Tenant  Improvement  Work”  shall  be
defined as all hard costs (“Hard Costs”) incurred by Landlord relating to the performance of the Tenant Improvement Work and
the  Landlord’s  Kitchen  Work,  collectively  (including,  without  limitation,  the  cost  of  obtaining  permits  and  any  applicable  state
sales and use taxes) and soft costs (“Soft Costs”) incurred by Landlord in connection with the Tenant Improvement Work and the
Landlord’s  Kitchen  Work,  collectively  (including,  without  limitation,  the  cost  of  preparing  the  DD  Plans,  the  Construction
Documents and the Kitchen CDs). For avoidance of doubt, and without limiting the generality of the foregoing, the Cost of Tenant
Improvement Work shall not include the costs of the Tenant’s Work or other costs and fees incurred by Tenant in connection with
the preparation of the Premises for Tenant’s initial occupancy (including, without limitation, consulting fees). Landlord will charge
Tenant  a  construction  management  fee  equal  to  2.5%  of  all  Hard  Costs  payable  by  Tenant  in  connection  with  the  Tenant
Improvement Work and the Landlord’s Kitchen Work, collectively. Landlord shall be solely responsible for the costs to construct
the Base Building Work.

2.

Contractor;  GMP.  Landlord  shall  enter  into  one  or  more  contracts  (each,  a  “Contract”)  for  the  Tenant

Improvement Work and the Landlord’s Kitchen Work with B.W.

Kennedy & Company, LLC (“Contractor”). The Contracts shall be on the basis of a guaranteed maximum price (“GMP”). The
GMP shall be determined based upon the sum of the following:

• Contractor’s Fee: 3% of the sum (“Cost of the Work”) of: (i) Direct Cost of the Work, and (ii) General

Conditions Costs (as established by the Contract).

• Direct Cost of the Work: Determined by bids obtained from subcontractors in accordance with Section 5 below.
• Contingency: 5% of the Cost of the Work.

3.

Preparation of Construction Documents. The Contractor and/or Landlord shall engage R.E. Dinneen Architects &
Planners, Inc. and B.W. Kennedy & Company, LLC as subconsultants to prepare the Construction Documents and Kitchen CDs
for Tenant’s approval, which approval shall not be unreasonably withheld, conditioned, or delayed.

4.

Tenant  Responses.  Tenant  shall  respond,  in  writing,  to  any  requests  from  Landlord  or  the  Contractor  for
information, consents, or authorizations to proceed, within four (4) business days of Tenant’s receipt of such request. Any failure
by Tenant to respond within such time period may be the basis of a Tenant Delay. Tenant shall have the right to hire a mutually
approved Tenant Construction Representative to oversee all required construction relative to the Tenant Premises.

5.

(i)

Bid Process. Tenant hereby acknowledges that:

the Contractor will receive a single bid for each of the following portions of Landlord’s Work from the designated
subcontractors  (“Designated  Subcontractors”)  listed  below  who  will  perform  both  the  design  and  construction
such portions of Landlord’s Work:

• Mechanical/HVAC: Environmental Systems, Inc.
•
•
• Electrical: Nappa Electrical Contractors

Plumbing: North Shore Mechanical Contractors, Inc.
Fire Protection: Legacy Fire Protection, Inc.

If requested by Tenant, Landlord will cause any Designated Subcontractor to provide backup documentation with
respect to its bid, reasonably demonstrating that its bid is competitively priced relative to similarly situated
subcontractors working in the Route 128/Route 2/Alewife corridor real estate market.

(ii)

Landlord will cause the Contractor to use reasonable efforts to obtain at least three (3) bidders for other portions of
Landlord’s Work; however, given the current market, it may not be possible to obtain more than one or two bidders
with respect to portions of Landlord’s Work.

If  Tenant  reasonably  determines  that  the  GMP  is  higher  than  is  acceptable  to  Tenant,  then  Tenant  shall  have  a  one-time
right to give request changes for each of the Tenant Improvement Work and the Landlord’s Kitchen Work, as applicable. In order
to exercise such one-time right to request changes for each of the Tenant Improvement Work and the Landlord’s Kitchen Work, as
applicable in order to reduce the GMP with respect to Tenant Improvement Work or the Landlord’s

Kitchen Work, as applicable, Tenant shall, on or before the date five (5) business days after Tenant receives Landlord’s notice to
Tenant  of  the  applicable  GMP,  give  written  notice  to  Landlord  specifying  the  changes  in  the  Tenant  Improvement  Work  or  the
Landlord’s Kitchen Work, as applicable, requested by Tenant. Such changes shall be subject to Landlord’s prior written approval
(which approval shall not be unreasonably withheld, conditioned, or delayed). Based upon the revised Construction Documents for
the  Tenant  Improvement  Work,  and/or  the  revised  Kitchen  CDs  for  the  Landlord’s  Kitchen  Work,  which  are  based  upon  the
changes  requested  by  Tenant,  as  approved  by  Landlord,  as  aforesaid,  the  Contractor  shall  revise  the  applicable  GMP  for  the
construction  of  the  Tenant  Improvement  Work  or  Landlord’s  Kitchen  Work,  as  applicable,  in  accordance  with  this  Section  5.
Tenant shall be responsible for the design cost associated with the preparation of the revised Construction Documents or Kitchen
CDs, as applicable. Tenant shall have the right to review the applicable revised GMP within five (5) business days after receipt
thereof.

6.

Tenant’s Share. For the purposes of this Exhibit 4: (i) if the Cost of Tenant Improvement Work is equal to, or less
than, the Maximum Amount, then “Tenant’s Construction Share” shall be 0%, or (ii) if the Cost of Tenant Improvement Work is
greater than the Maximum Amount, then Tenant’s Construction Share shall be a fraction, the numerator of which is the amount by
which the total Cost of Tenant Improvement Work exceeds the Maximum Amount and the denominator of which is the total Cost
of Tenant Improvement Work. Following Substantial Completion of the Tenant Improvement Work and Landlord’s Kitchen Work,
Landlord  will  provide  Tenant  with  documentation  demonstrating  the  final  Cost  of  Tenant  Improvement  Work,  which
documentation  shall  consist  of  copies  of  the  requisitions  from  the  Contractor  and  invoices  from  vendors  and  consultants  not
otherwise included in the requisitions.

7.

Tenant’s  Obligation  to  Pay.  If  the  Cost  of  Tenant  Improvement  Work  exceeds  the  Maximum  Amount,  Tenant
shall pay to Landlord such excess costs as follows: (i) Tenant shall pay Tenant’s Share of Tenant Improvement Costs within thirty
(30) days of Billing, as hereinafter defined, (ii) with respect to any Changes to the Tenant Improvement Work, Tenant shall pay for
the  cost  of  such  changes  in  accordance  with  Section  8  below,  and  (iii)  with  respect  to  any  increases  in  the  Cost  of  Tenant
Improvement Work arising from Claims by the Contractor, Tenant shall pay for the cost of such Claims as set forth in Section 9
below. “Billing” shall be defined as any invoice from Landlord setting forth, reasonable detail, the amount due from Tenant, and
shall include invoices from vendors and service providers, and applications for payment from the Contractor for work completed
through the date of Billing, as certified by the Contractor. Billing may not be submitted to Tenant more than one time per calendar
month.  The  amounts  payable  by  Tenant  hereunder  constitute  Rent  payable  pursuant  to  the  Lease,  and  the  failure  to  timely  pay
same constitutes an Event of Default under the Lease.

8.

Changes. If Tenant shall request any change, addition or alteration in any of the Construction Documents and/or
Kitchen CD’s after approval by Landlord (“Changes”), Landlord shall diligently prepare revisions to the drawings consistent with
Tenant’s request. Promptly upon completion of the revisions, Landlord shall notify Tenant in writing of the increased cost, if any,
which will be chargeable to Tenant by reason of such change, addition or deletion. Tenant, within three (3) business days, shall
notify Landlord in writing whether it desires to proceed with such Change. In the absence of such written authorization, Landlord
shall  have  the  option  to  continue  work  on  the  Premises  disregarding  the  requested  Change.  To  the  extent  that  the  cost  of
performing

such revisions cause the Cost of Tenant Improvement Work to exceed the Maximum Amount, Tenant shall reimburse Landlord for
the such excess in the Cost of Tenant Improvement Work associated with such Changes within thirty (30) days of approving the
Changes.

9.

Claims. To the extent that any claims (“Claims”) by the Contractor cause the Cost of Tenant Improvement Work
to  exceed  the  Maximum  Amount,  Tenant  shall  pay  for  such  excess  within  thirty  (30)  days  of  Billing.  Claims  shall  include  any
amounts properly due to the Contractor under the Contract based upon the claims of the Contractor under the Contract, provided
however, that the Claims shall not include any amounts arising from the default or negligence of Landlord, or Landlord’s agents or
employees, under the Contract.

10.

Performance  of  Landlord’s  Work.  Following  approval  of  the  Construction  Documents  and  Tenant’s  written
authorization to proceed with Tenant Improvement Work, Landlord shall cause the Tenant Improvement Work to be constructed in
a good and workmanlike manner in compliance with applicable Legal Requirements and, in all material respects, in accordance
with the approved Construction Documents. Following approval of the Kitchen CDs and Tenant’s written authorization to proceed
with  the  Landlord’s  Kitchen  Work,  Landlord  shall  cause  the  Landlord’s  Kitchen  Work  to  be  constructed  in  a  good  and
workmanlike manner, based on the agreed-upon construction timeline, in compliance with applicable Legal Requirements and, in
all material respects, in accordance with the approved Kitchen CDs.

11.

Landlord’s Contribution:

a.

Except as set forth in this Section 11, any portion of Landlord’s Contribution which exceeds the Cost of Tenant
Improvement Work (the “Remaining Portion of Landlord’s Contribution”) shall accrue to the sole benefit of Landlord, it being
agreed that Tenant shall not be entitled to any credit, offset, abatement or payment with respect thereto.

b.

Requisitions. If there is any Remaining Portion of Landlord’s Contribution, Tenant may submit Requisitions, as
hereinafter defined, to Landlord to pay for the costs (collectively, “Other Permitted Costs”) for Tenant’s Security System Work,
telephone and data wiring throughout the Premises and reasonable fees for Tenant’s third-party project manager, as follows:

(1)
A “Requisition” shall mean (1) an application for payment (accompanied by, without limitation, invoices from
Tenant’s  contractors,  vendors,  service  providers  and  consultants  (collectively,  “Tenant’s  Contractors”)  listing  in
reasonable  detail  Other  Permitted  Costs,  (2)  a  certification  executed  by  an  authorized  representative  of  Tenant  that  the
amount  of  the  Requisition  in  question  does  not  exceed  the  cost  of  the  items,  services  and  work  covered  by  such
Requisition, and (3) only with respect to those items and services covered by such Requisition for which mechanic’s lien
rights arise under Massachusetts Law, partial lien waivers and subordinations of lien, as specified in M.G.L. Chapter 254,
Section 32 (“Lien Waivers”). Landlord shall have the right, upon reasonable advance notice to Tenant, to inspect Tenant’s
books and records relating to each Requisition in order to verify the amount thereof. Tenant shall submit Requisition(s) no
more often than monthly.

On the condition that Tenant is not in default of its obligations under the Lease at the time that Landlord receives
(2)
a Requisition, Landlord shall pay the amount properly due under such Requisition with forty-five (45) days of receipt of
such Requisition. Notwithstanding the foregoing, if Landlord declines to pay Tenant on account of any Requisition based
upon Tenant then being in default of its obligations under the Lease, and if Tenant subsequently cures such default, then
Tenant  shall  have  the  right  to  resubmit  such  Requisition,  and  Landlord  shall  pay  the  amount  due  on  account  of  such
Requisition, provided that the Lease is then in full force and effect and all of the conditions to payment on account of such
Requisition are then satisfied.

(3)
Notwithstanding  anything  to  the  contrary  herein  contained:  (i)  Landlord  shall  have  no  obligation  to  advance
funds  on  account  of  Landlord’s  Contribution  more  than  once  per  month;  (ii)  if  any  Tenant’s  Contractor  (including
subcontractors of any tier, or materialman) records a Notice of Contract which is not discharged or bonded over by, on or
behalf  of,  Tenant,  Landlord  shall  thereafter  have  the  right  to  have  the  relevant  portion  of  Landlord’s  Contribution  paid
directly to such lienor upon receipt of requisite documentation from such lienor evidencing payment to be due and owing,
only upon Landlord notifying Tenant in writing of its intent to pay such portion of Landlord’s Contribution directly to such
contractors and Tenant failing within five (5) business days of receipt of such notice to (x) bond over or discharge such
lien, as a matter of record or
(y) pay such lienor (and provide evidence of such payment to Landlord) the amounts claimed owing to such lienor; (iii)
Landlord shall have no obligation to pay any portion of Landlord’s Contribution with respect to any Requisition submitted
after July 15, 2021 (the “Outside Requisition Date”).

12. Miscellaneous

(a)

 Tenant’s Authorized Representative. Tenant designates David W. Miller (email: dmiller@dicerna.com,
telephone 617-612-6220; “Tenant’s Representative”) as the only person authorized to act for Tenant pursuant to this Work Letter.
Landlord  shall  not  be  obligated  to  respond  to  or  act  upon  any  request,  approval,  inquiry  or  other  communication
(“Communication”) from or on behalf of Tenant in connection with this Work Letter unless such Communication is in writing
from Tenant’s Representative. Tenant may change either Tenant’s Representative at any time upon not less than five (5) business
days advance written notice to Landlord.

(b)

Landlord’s Authorized Representative. Landlord designates Michael DiMinico (email: mdiminico@ks-
prop.com, telephone 617-910-5503; “Landlord’s Representative”) as the only person authorized to act for Landlord pursuant to
this Work Letter. Tenant shall not be obligated to respond to or act upon any request, approval, inquiry or other Communication
from  or  on  behalf  of  Landlord  in  connection  with  this  Work  Letter  unless  such  Communication  is  in  writing  from  Landlord’s
Representative.  Landlord  may  change  either  Landlord’s  Representative  at  any  time  upon  not  less  than  five  (5)  business  days
advance written notice to Tenant.

(c)

Tenant shall have the right, during the performance of Landlord’s Work, to have Tenant’s Representative

or other project manager representative participate in weekly

construction meetings with Landlord and the Contractor as to the status of the performance of the Tenant Improvement Work and
the Landlord’s Kitchen Work.

provisions of Section 1.4 of the Lease.

(d)

Tenant shall have access to the Premises prior to the Term Commencement Date in accordance with the

13.

Disputes.

Any disputes relating to provisions or obligations in this Lease in connection with Landlord’s Work or Tenant’s Work or
this  Exhibit  4  shall  be  submitted  to  arbitration  in  accordance  with  the  provisions  of  applicable  state  law,  as  from  time  to  time
amended. Arbitration proceedings, including the selection of an arbitrator, shall be conducted pursuant to the rules, regulations and
procedures from time to time in effect as promulgated by the American Arbitration Association. Notwithstanding the foregoing,
the parties hereby agree that the arbitrator for any disputes relating to Landlord’s Work or Tenant’s Work shall be a construction
consultant,  experienced  in  the  construction  of  offices/research/laboratory  buildings/campuses  in  the  Route  128/Route  2/Alewife
corridor real estate market, as mutually agreed upon by the parties, or, if not then designated by the parties, within ten (10) days
after  either  party  makes  a  request  for  arbitration  hereunder,  or  (if  the  parties  do  not  mutually  agree  upon  such  arbitrator)  as
designated  by  the  Boston  office  of  the  American  Arbitration  Association  upon  request  by  either  party.  Prior  written  notice  of
application by either party for arbitration shall be given to the other at least ten (10) days before submission of the application to
the said Association’s office in Boston, Massachusetts. The arbitrator shall hear the parties and their evidence. The decision of the
arbitrator  shall  be  binding  and  conclusive,  and  judgment  upon  the  award  or  decision  of  the  arbitrator  may  be  entered  in  the
appropriate court of law; and the parties consent to the jurisdiction of such court and further agree that any process or notice of
motion  or  other  application  to  the  Court  or  a  Judge  thereof  may  be  served  outside  the  Commonwealth  of  Massachusetts  by
registered  mail  or  by  personal  service,  provided  a  reasonable  time  for  appearance  is  allowed.  The  costs  and  expenses  of  each
arbitration hereunder and their apportionment between the parties shall be determined by the arbitrator in his award or decision.
Except where a specified period is referenced in this Lease, no arbitrable dispute shall be deemed to have arisen under this Lease
prior to the expiration of the period of twenty (20) days after the date of the giving of written notice by the party asserting the
existence  of  the  dispute  together  with  a  description  thereof  sufficient  for  an  understanding  thereof.  In  connection  with  the
foregoing, it is expressly understood and agreed that the parties shall continue to perform their respective obligations under the
Lease  during  the  pendency  of  any  such  arbitration  proceeding  hereunder  (with  any  adjustments  or  reallocations  to  be  made  on
account of such continued performance as determined by the arbitrator in his or her award).

EXHIBIT 4-1 BASE BUILDING PLANS

EXHIBIT 4-2 TENANT/LANDLORD RESPONSIBILITY MATRIX

EXHIBIT 4-3 TENANT SCHEMATIC PLAN

[see attached]

EXHIBIT 5

BASE BUILDING CAPACITIES

• HVAC – supply air capacity to the Premises: 54,500 CFM
•

Power – lights, plugs, misc. equipment solely serving the Premises: 469,000 watts

EXHIBIT 6

FORM OF LETTER OF CREDIT

L/C DRAFT LANGUAGE

IRREVOCABLE STANDBY LETTER OF CREDIT NUMBER      ISSUE DATE:     

ISSUING BANK:
SILICON VALLEY BANK 3003 TASMAN DRIVE
2ND FLOOR, MAIL SORT HF210 SANTA CLARA, CALIFORNIA 95054

BENEFICIARY:
HCP/King 75 Hayden LLC c/o King Street Properties
800 Boylston Street, Suite 1570
Boston, MA 02199 Attention: Stephen D. Lynch

APPLICANT:
DICERNA PHARMACEUTICALS, INC.
33 Hayden Avenue
Lexington, MA 02421
Attn: David W. Miller, PhD, SVP

AMOUNT:

US$1,519,282.90  (ONE  MILLION  FIVE  HUNDRED  NINETEEN  THOUSAND  TWO  HUNDRED
EIGHTY TWO AND 90/100 U.S. DOLLARS)

EXPIRATION  DATE:                  ,  20  (ONE  YEAR  FROM  ISSUE  DATE)  PLACE  OF  EXPIRATION:  ISSUING  BANK’S

COUNTERS AT ITS ABOVE ADDRESS DEAR SIR/MADAM:

WE HEREBY ESTABLISH OUR IRREVOCABLE STANDBY LETTER OF CREDIT NO.
SVBSF     IN YOUR FAVOR AVAILABLE BY PAYMENT AGAINST YOUR
PRESENTATION TO US OF THE FOLLOWING DOCUMENT:

1.BENEFICIARY’S SIGNED AND DATED STATEMENT STATING AS FOLLOWS:

“LANDLORD  IS  ENTITLED  TO  DRAW  DOWN  ON  THE  LETTER  OF  CREDIT  UNDER  THAT  CERTAIN  LEASE
AGREEMENT BETWEEN DICERNA PHARMACEUTICALS, INC., AS TENANT, AND HCP/KING 75 HAYDEN LLC, AS
LANDLORD, AS AMENDED, SUPPLEMENTED OR OTHERWISE MODIFIED TO DATE. THE UNDERSIGNED HEREBY
CERTIFIES THAT: (I) THE UNDERSIGNED IS AN AUTHORIZED REPRESENTATIVE OF LANDLORD; (II) LANDLORD
IS THE BENEFICIARY OF LETTER OF CREDIT NO. SVBSF
     ISSUED BY SILICON VALLEY BANK; AND (III) LANDLORD IS AUTHORIZED TO DRAW DOWN ON THE LETTER
OF CREDIT. THE AMOUNT HEREBY DRAWN UNDER THE LETTER OF CREDIT IS US$     , WITH PAYMENT TO BE
MADE  TO  THE  FOLLOWING  ACCOUNT:  [INSERT  WIRE  INSTRUCTIONS  (TO  INCLUDE  NAME  AND  ACCOUNT
NUMBER OF THE BENEFICIARY)”

PARTIAL DRAWS AND MULTIPLE PRESENTATIONS ARE ALLOWED.

THIS LETTER OF CREDIT SHALL BE AUTOMATICALLY EXTENDED FOR AN ADDITIONAL PERIOD OF ONE YEAR,
WITHOUT AMENDMENT, FROM THE PRESENT OR EACH FUTURE EXPIRATION DATE UNLESS AT LEAST 60 DAYS
PRIOR TO THE THEN CURRENT EXPIRATION DATE WE SEND TO YOU A NOTICE BY REGISTERED OR CERTIFIED
MAIL OR OVERNIGHT COURIER SERVICE AT THE ABOVE ADDRESS THAT THIS LETTER OF CREDIT WILL NOT
BE EXTENDED BEYOND THE THEN CURRENT EXPIRATION DATE. IN NO EVENT SHALL THIS LETTER OF CREDIT
BE AUTOMATICALLY EXTENDED BEYOND FEBRUARY 28, 2031. IN THE EVENT WE SEND SUCH NOTICE OF NON-
EXTENSION,  YOU  MAY  DRAW  HEREUNDER  BY  YOUR  PRESENTATION  TO  US  OF  YOUR  SIGNED  AND  DATED
STATEMENT STATING THAT YOU HAVE RECEIVED A NON-EXTENSION NOTICE FROM SILICON VALLEY BANK IN
RESPECT OF LETTER OF CREDIT NO. SVBSF         , YOU ARE DRAWING ON SUCH LETTER OF CREDIT FOR US$     ,
AND YOU HAVE NOT RECEIVED A REPLACEMENT LETTER OF CREDIT ACCEPTABLE TO YOU.

ALL  DEMANDS  FOR  PAYMENT  SHALL  BE  MADE  BY  PRESENTATION  OF  THE  REQUIRED  DOCUMENTS  ON  A
BUSINESS DAY AT OUR OFFICE (THE “BANK’S OFFICE”) AT: SILICON VALLEY BANK, 3003 TASMAN DRIVE, MAIL
SORT  HF  210,  SANTA  CLARA,  CA  95054,  ATTENTION:  GLOBAL  TRADE  FINANCE.  AS  USED  IN  THIS  LETTER  OF
CREDIT, "BUSINESS DAY" SHALL MEAN ANY DAY OTHER THAN A SATURDAY, SUNDAY OR A DAY ON WHICH
BANKING INSTITUTIONS IN THE STATE OF CALIFORNIA ARE AUTHORIZED OR REQUIRED BY LAW TO CLOSE.

FACSIMILE PRESENTATIONS ARE ALSO PERMITTED. SHOULD BENEFICIARY WISH TO MAKE A PRESENTATION
UNDER  THIS  LETTER  OF  CREDIT  ENTIRELY  BY  FACSIMILE  TRANSMISSION  IT  NEED  NOT  TRANSMIT  THE
ORIGINAL OF THIS LETTER OF CREDIT AND AMENDMENTS, IF ANY. EACH FACSIMILE TRANSMISSION

SHALL BE MADE AT: (408) 496-2418 OR (408) 969-6510; AND UNDER CONTEMPORANEOUS TELEPHONE ADVICE
TO: (408) --- ---- OR (408)    ,
ATTENTION:  GLOBAL  TRADE  FINANCE.  ABSENCE  OF  THE  AFORESAID  TELEPHONE  ADVICE  SHALL  NOT
AFFECT OUR OBLIGATION TO HONOR ANY DRAW REQUEST.

THIS LETTER OF CREDIT IS TRANSFERABLE IN WHOLE BUT NOT IN PART ONE OR MORE TIMES, BUT IN EACH
INSTANCE  ONLY  TO  A  SINGLE  BENEFICIARY  AS  TRANSFEREE  AND  FOR  THE  THEN  AVAILABLE  AMOUNT,
ASSUMING  SUCH  TRANSFER  TO  SUCH  TRANSFEREE  WOULD  BE  IN  COMPLIANCE  WITH  THEN  APPLICABLE
LAW AND REGULATION, INCLUDING BUT NOT LIMITED TO THE REGULATIONS OF THE U.S. DEPARTMENT OF
TREASURY  AND  U.S.  DEPARTMENT  OF  COMMERCE.  AT  THE  TIME  OF  TRANSFER,  THE  ORIGINAL  LETTER  OF
CREDIT  AND  ORIGINALS  OR  COPIES  OF  ALL  AMENDMENTS,  IF  ANY,  TO  THIS  LETTER  OF  CREDIT  MUST  BE
SURRENDERED  TO  US  AT  OUR  ADDRESS  INDICATED  IN  THIS  LETTER  OF  CREDIT  TOGETHER  WITH  OUR
TRANSFER FORM ATTACHED HERETO AS EXHIBIT A DULY EXECUTED. APPLICANT SHALL PAY OUR TRANSFER
FEE  OF  ¼  OF  1%  OF  THE  TRANSFER  AMOUNT  (MINIMUM  US$250.00)  UNDER  THIS  LETTER  OF  CREDIT.
HOWEVER,  APPLICANT’S  PAYMENT  OF  SUCH  TRANSFER  FEE  SHALL  NOT  BE  A  CONDITION  OF  SUCH
TRANSFER. EACH TRANSFER SHALL BE EVIDENCED BY EITHER (1) OUR ENDORSEMENT ON THE REVERSE OF
THE LETTER OF CREDIT AND WE SHALL FORWARD THE ORIGINAL OF THE LETTER OF CREDIT SO ENDORSED
TO  THE  TRANSFEREE  OR  (2)  OUR  ISSUING  A  REPLACEMENT  LETTER  OF  CREDIT  TO  THE  TRANSFEREE  ON
SUBSTANTIALLY THE SAME TERMS AND CONDITIONS AS THE TRANSFERRED LETTER OF CREDIT (IN WHICH
EVENT THE TRANSFERRED LETTER OF CREDIT SHALL HAVE NO FURTHER EFFECT).

IF  ANY  INSTRUCTIONS  ACCOMPANYING  A  DRAWING  UNDER  THIS  LETTER  OF  CREDIT  REQUEST  THAT
PAYMENT IS TO BE MADE BY TRANSFER TO YOUR ACCOUNT WITH ANOTHER BANK, WE WILL ONLY EFFECT
SUCH PAYMENT BY FED WIRE TO A U.S. REGULATED BANK, AND WE AND/OR SUCH OTHER BANK MAY RELY
ON AN ACCOUNT NUMBER SPECIFIED IN SUCH INSTRUCTIONS EVEN IF THE NUMBER IDENTIFIES A PERSON
OR ENTITY DIFFERENT FROM THE INTENDED PAYEE.

THIS LETTER OF CREDIT IS SUBJECT TO THE INTERNATIONAL STANDBY PRACTICES (ISP98), INTERNATIONAL
CHAMBER OF COMMERCE, PUBLICATION NO. 590.

AUTHORIZED SIGNATURE    AUTHORIZED SIGNATURE

IRREVOCABLE STANDBY LETTER OF CREDIT NUMBER     

EXHIBIT A

FORM OF TRANSFER FORM

DATE:     

TO: SILICON VALLEY BANK

3003 TASMAN DRIVE    RE: IRREVOCABLE STANDBY LETTER OF CREDIT
SANTA CLARA, CA 95054    NO.     ISSUED BY
ATTN: GLOBAL TRADE FINANCE    SILICON VALLEY BANK, SANTA CLARA STANDBY LETTERS OF CREDIT    L/C AMOUNT:     

GENTLEMEN:

FOR VALUE RECEIVED, THE UNDERSIGNED BENEFICIARY HEREBY IRREVOCABLY TRANSFERS TO:

(NAME OF TRANSFEREE)

(ADDRESS)

ALL RIGHTS OF THE UNDERSIGNED BENEFICIARY TO DRAW UNDER THE ABOVE LETTER OF CREDIT UP TO ITS AVAILABLE AMOUNT AS SHOWN
ABOVE AS OF THE DATE OF THIS TRANSFER.

BY  THIS  TRANSFER,  ALL  RIGHTS  OF  THE  UNDERSIGNED  BENEFICIARY  IN  SUCH  LETTER  OF  CREDIT  ARE  TRANSFERRED  TO  THE  TRANSFEREE.
TRANSFEREE SHALL HAVE THE SOLE RIGHTS AS BENEFICIARY THEREOF, INCLUDING SOLE RIGHTS RELATING TO ANY AMENDMENTS, WHETHER
INCREASES  OR  EXTENSIONS  OR  OTHER  AMENDMENTS,  AND  WHETHER  NOW  EXISTING  OR  HEREAFTER  MADE.  ALL  AMENDMENTS  ARE  TO  BE
ADVISED DIRECTLY TO THE TRANSFEREE WITHOUT NECESSITY OF ANY CONSENT OF OR NOTICE TO THE UNDERSIGNED BENEFICIARY.

THE  ORIGINAL  OF  SUCH  LETTER  OF  CREDIT  IS  RETURNED  HEREWITH,  AND  WE  ASK  YOU  TO  EITHER  (1)  ENDORSE  THE  TRANSFER  ON  THE
REVERSE  THEREOF,  AND  FORWARD  IT  DIRECTLY  TO  THE  TRANSFEREE  WITH  YOUR  CUSTOMARY  NOTICE  OF  TRANSFER,  OR  (2)  ISSUE  A
REPLACEMENT LETTER OF CREDIT TO THE TRANSFEREE ON SUBSTANTIALLY THE SAME TERMS AND CONDITIONS AS THE TRANSFERRED LETTER
OF CREDIT (IN WHICH EVENT THE TRANSFERRED LETTER OF CREDIT SHALL HAVE NO FURTHER EFFECT).

SINCERELY,

SIGNATURE AUTHENTICATED

The name(s), title(s), and signature(s) conform to that/those on file with us for the company and the signature(s) is/are authorized to execute this instrument.

(Name of Bank) (Address of Bank) (City, State, ZIP Code)

(Authorized Name and Title)

(Authorized Signature) (Telephone number)

(BENEFICIARY’S NAME)

(SIGNATURE OF BENEFICIARY)

(NAME AND TITLE)

EXHIBIT 7 LANDLORD’S SERVICES

1.
2.
3.

5.
6.
7.
8.
9.
10.
11.
12.

Hot and cold water to the common area lavatories, and cold water to the Premises
Electricity for building common areas
HVAC services to the Building common areas and the Premises (but excepting those areas served by HVAC solely
dedicated to any tenant)
Elevator service
Trash removal
Snow removal
Exterior grounds and parking maintenance
Management services
Building security systems and services
Maintenance of life safety systems (fire alarm and sprinkler)
Such other services as Landlord reasonably determines are necessary or appropriate for the Property

EXHIBIT 8 [INTENTIONALLY OMITTED]

A.

General

EXHIBIT 9-1

BUILDING RULES AND REGULATIONS

75 HAYDEN AVENUE, LEXINGTON, MA

1.

Tenant and its employees shall not in any way obstruct the sidewalks, halls, stairways, or exterior vestibules of
the  Building,  and  shall  use  the  same  only  as  a  means  of  passage  to  and  from  their  respective  offices.  At  no  time  shall  Tenants
permit its employees, contractors, or other representatives to loiter in Common Areas or elsewhere in and about the Property.

2.

3.

4.

Corridor doors, when not in use, shall be kept closed.

Areas used in common by tenants shall be subject to such regulations as are posted therein.

Any Tenant or vendor sponsored activity or event in the Common Area must be approved and scheduled through

Landlord’s representative, which approval shall not be unreasonably withheld.

5    No animals, except Seeing Eye dogs, shall be brought into or kept in, on or about the Premises or Common Areas,

except as approved by Landlord.

6.

Alcoholic  beverages  (without  Landlord’s  prior  written  consent  which  shall  not  be  unreasonably  withheld,
conditioned or delayed), illegal drugs or other illegal controlled substances are not permitted in the Common Areas, nor will any
person under the influence of the same be permitted in the Common Areas. Landlord reserves the right to exclude or expel from
the Building any persons who, in the judgment of the Landlord, is under the influence of alcohol or drugs, or shall do any act in
violation of the rules and regulations of the Building.

7.

8.

9.

No firearms or other weapons are permitted in the Common Areas.

No fighting or “horseplay” will be tolerated at any time in the Common Areas.

Tenant shall not cause any unnecessary janitorial labor or services in the Common Areas by reason of Tenant’s

carelessness or indifference in the preservation of good order and cleanliness.

10.

Smoking and discarding of smoking materials by Tenant and/or any Tenant Party is permitted only in exterior

locations designated by Landlord. Tenant will instruct and notify its employees and visitors of such policy.

11.

Bicycles and other vehicles are not permitted inside or on the walkways outside the Building, except in those

areas specifically designated by Landlord for such purposes

Exhibit 9-1, Page 1

12.

Tenant shall not operate or permit to be operated on the Premises any coin or token operated vending machine or
similar  device  (including,  without  limitation,  telephones,  lockers,  toilets,  scales,  amusement  devices  and  machines  for  sale  of
beverages food, candy, cigarettes or other goods), except for those vending machines or similar devices which are for the sole and
exclusive use of tenant’s employees and located within the Tenant Premises.

13.

Canvassing,  soliciting,  and  peddling  in  or  about  the  Building  is  prohibited.  Tenant,  its  employees,  agents  and
contractors  shall  cooperate  with  said  policy,  and  Tenant  shall  cooperate  and  use  best  efforts  to  prevent  the  same  by  Tenant’s
invitees.

14.

Fire protection and prevention practices implemented by the Landlord from time to time in the Common Areas,

including participation in fire drills, must be observed by Tenant at all times.

15.

Except as provided for in the Lease, no signs, advertisements or notices shall be painted or affixed on or to any
windows, doors or other parts of the Building that are visible from the exterior of the Building unless approved in writing by the
Landlord.

16.

The restroom fixtures shall be used only for the purpose for which they were constructed and no rubbish, ashes,

or other substances of any kind shall be thrown into them. Tenant will bear the expense of any damage resulting from misuse.

17.

18.

Tenant will not interfere with or obstruct any building central HVAC, electrical, or plumbing systems.

Tenant shall utilize the pest control service designated by Landlord to control pests in the Premises. Except as

included in Landlord’s Services, tenants shall bear the cost and expense of such pest control services.

19.

Tenant shall not install, operate or maintain in the Premises or in any other area of the Building, any electrical
equipment  which  does  not  bear  the  U/L  (Underwriters  Laboratories)  seal  of  approval,  or  which  would  overload  the  electrical
system  or  any  part  thereof  beyond  its  capacity  for  proper,  efficient  and  safe  operation  as  determined  by  Landlord,  taking  into
consideration the overall electrical system and the present and future requirements of the Building. The capacity of the electrical
system is listed on Exhibit 5 attached hereto.

20.

Tenants shall not use more than its proportionate share of telephone lines available to service the Building.

21.

Tenants shall not perform improvements or alterations within the Building or their Premises, if the work has the
potential  of  disturbing  the  fireproofing  which  has  been  applied  on  the  surfaces  of  structural  steel  members,  without  the  prior
written consent of Landlord, subject to the provisions of the Lease.

22.

Tenant  shall  manage  its  waste  removal  and  janitorial  program,  at  its  sole  cost  and  expense,  keeping  any
recyclables, garbage, trash, rubbish and refuse in vermin proof containers for Tenants sole use within the Landlord designated area
until removed with all work to be performed during non-business hours.

23.

Lab  operators  who  travel  outside  lab  space  must  abide  by  the  one  glove  rule  and  remove  lab  coats  where

predetermined.

24.

To  the  extent  required  by  the  Chemical  Safety  Program,  chemical  lists  and  MSDS  sheets  must  be  readily
available at the entrance to each lab area. In the event of an emergency, first responders will require this information in order to
properly evaluate the situation.

25.

Tenant  shall  provide  Landlord,  in  writing,  the  names  and  contact  information  of  two  (2)  representatives
authorized by Tenant to request Landlord services, either billable or non- billable and to act as a liaison for matters related to the
Premises.

26.

Parking of any trailers, trucks, motor homes, or unregistered vehicles in the parking lots is prohibited.

27.

Tenants shall not use more than its proportionate share of Base Building Central HVAC or electrical capacity,

subject to the provisions of the lease.

B.

Access & Security

1.        Landlord  reserves  the  right  to  close  and  keep  locked  all  entrance  and  exit  doors  of  the  Building  during  the  hours
Landlord may deem advisable for the adequate protection of the Property. Use of the Building and the leased Premises before 8
AM or after 6 PM, or any time during Saturdays, Sundays or legal holidays shall be allowed only to persons with a key/card key to
the Building or guests accompanied by such persons. Any persons found in the Building after hours without such keys/card keys
are subject to the surveillance of building staff.

2.    Tenant shall not place any additional lock or locks on any exterior door in the Premises or Building or on any door in
the Building core within the Premises, including doors providing access to the telephone and electric closets and the slop sink,
without Landlord’s prior written consent. A reasonable number of keys to the locks on the doors in the Premises shall be furnished
by  Landlord  to  Tenant  at  the  cost  of  Tenant,  and  Tenant  shall  not  have  any  duplicate  keys  made.  All  keys  shall  be  returned  to
landlord at the expiration or earlier termination of this Lease.

3.    Landlord may from time to time adopt appropriate systems and procedures for the security or safety of the Building, its
occupants, entry and use, or its contents, provided that Tenant shall have access to the Building 24 hours per day, 7 days a week.
Tenant, Tenant’s agents, employees, contractors, guests and invitees shall comply with Landlord’s reasonable requirements relative
thereto.

4.        Tenant  acknowledges  that  Property  security  problems  may  occur  which  may  require  the  employment  of  extreme
security  measures  in  the  day-to-day  operation  of  the  Common  Areas.  Accordingly,  Tenant  agrees  to  cooperate  and  cause  its
employees,  contractors,  and  other  representatives  to  cooperate  fully  with  Landlord  in  the  implementation  of  any  reasonable
security procedures concerning the Common Areas.

5.        Tenant  and  its  employees,  agents,  contractors,  invitees  and  licensees  are  limited  to  the  Premises  and  the  Common

Areas. Tenants and its employees, agents, contractors, invitees and

licensees may not enter other areas of the Project (other than the Common Areas) except when accompanied by an escort from the
Landlord.

C.

Shipping/Receiving

1.    Dock areas for the Building shall not be used for storage or staging by Tenant except in the Loading Dock Premises as

permitted in the Lease.

2.    In no case shall any truck or trailer be permitted to remain in a loading dock area for more than 60 minutes, except with
prior written notice to Landlord, which notice may be given via email, provided that, in any event Landlord shall have the right, in
good faith, to require Tenant to adjust its schedule for the use of the dock areas based upon the needs of the other tenants of the
Building and Building operations.

3.    There shall not be used in any Common Area, either by Tenant or by delivery personnel or others, in the delivery or

receipt of merchandise, any hand trucks, except those equipped with rubber tires and sole guards.

4.        Lab  operators  carrying  any  lab  related  materials  may  only  travel  within  the  Premises.  At  no  time  should  any  lab

materials travel in the Common Areas, except at the Loading Dock and Freight Elevator.

5.

Any dry ice brought into the building must be delivered through the loading dock.

6.    All nitrogen tanks must travel through the loading dock and should never be left unattended outside of the Premises.

EXHIBIT 9-2 TENANT CONSTRUCTION

BUILDING RULES AND REGULATIONS

LINCOLN PROPERTY COMPANY TENANT CONSTRUCTION
BUILDING RULES AND REGULATIONS

THE RULES MUST BE POSTED AT THE JOB SITE AT ALL TIMES!

1.

2.

3.

Parking.  Parking  areas  are  designated  by  the  Management  Office  and  are  subject  to  change  at  any  time.  Construction
personnel  are  required  to  park  in  the  parking  areas  designated  by  the  Management  Office.  Failure  to  adhere  to  this
regulation will result in the towing of the vehicle in violation at the owner’s expense.

Access. Building entrances; lobbies, passages, corridors, public elevators, stairways, and other common areas may not be
encumbered,  or  obstructed  by  the  contractor,  or  contractor’s  agents  during  construction  of  the  tenant’s  lease  premises.
Material  deliveries  must  be  scheduled  in  advance  through  the  Management  Office  and  coordinated  with  the  Lincoln
Property  Company  representative.  Contractors  are  not  to  use  Tenant  phones,  or  Restrooms  under  any  circumstances.
Construction personnel found using phones, or restrooms located in the tenant’s suite will be asked to immediately leave
the premises and will not be allowed to return.

Each contractor is responsible for their subcontractor(s), and for the actions of their personnel including clean-up of work
and construction traffic. No alcoholic beverages, glass containers, or “controlled substances” are allowed on the premises.
All work must be scheduled through the Management Office and include a list of contractors performing work prior to the
start of the work. After-hours work must be scheduled through the Management Office 24 hours before the activity will
occur. Weekend activity must be scheduled by Friday at 9 a.m. Contractors will not  be  allowed  to  work  in  the  Building
after hours, or on weekends unless the procedures outlined above have been followed.

All after-hours work must be supervised by the general contractor. There will be no exceptions to this rule.

Prior to the commencement and upon completion of each job, a walk-through of public areas will be made, i.e. restrooms,
etc.,  and  any  subsequent  damages  will  be  the  responsibility  of  the  contractor.  The  contractor  shall  be  responsible  for
cleaning the assigned restrooms each day at his own expense.

4.

Noise and Vapor Restrictions. Any work that would cause inconvenience to other tenants in the Building, or that must be
done in an occupied space must be done after hours or on the weekend. Structural modifications, floor penetrations created
with the use of core drilling machines, pneumatic hammers, etc., shall be performed before 7:30 a.m. or after

7:00  p.m.  Likewise,  any  construction  operations  causing  excessive  noise,  dust,  vapors  must  be  conducted  during  these
hours.

When construction is on an occupied multi-tenant floor, noise, i.e., radios, loud talking, noise from equipment, etc., must
be kept to a minimum. On these multi-tenant floors, public restrooms are not to be used by contractors.

A  Lincoln  Property  Company  superintendent,  or  the  Property  Manager  will  have  the  sole  authority  to  determine  if  an
operation is causing excessive noise, dust, or vapors.

Lincoln Property Company has the right to inspect work at any time and may reject work that does not conform to code,
tenant’s plans, or work that may affect the exterior appearance, structural components, or service system of the building.

Mechanical  and  electrical  shop  drawings  must  be  reviewed  and  approved  by  Landlord’s  approved  engineer.  Prior  to
starting  work,  the  general,  mechanical,  and  electrical  contractors  must  review  the  work  with  the  Facilities  Manager  and
Facilities Supervisor.

All  panels  and  transformers  are  to  match  the  building  standard  systems  and  all  materials  and  methods  used  to  connect
panels and transformers must be approved by Landlord.

Unscheduled outages of any utility, or building service is strictly prohibited.

Dust and air contamination are to be controlled with temporary partitions which are sealed adequately to prevent dust from
entering  leased  areas  or  mechanical  equipment.  Floor  sweep  or  a  comparable  material  will  be  used  when  sweeping
concrete or tile floors.

Clean-up of Common and Lease Areas. Premises must be kept in a clean, orderly fashion at all times and free of potential
safety and fire hazards. A general clean-up of the space under construction is to be performed on a daily basis. Final clean-
up  will  be  the  responsibility  of  the  contractor,  which  is  to  include  all  vacuuming  and  dusting  as  required.  Failure  to
adequately  keep  the  work  area  clean  and  accessible  will  result  in  Lincoln  Property  Company  using  its  own  forces  to
achieve this through whatever means determined necessary, and the total cost will be deducted from the contract.

Trash  Removal.  Contractor  is  responsible  for  removing  all  construction  debris  and  trash  from  the  construction  site.
UNDER  NO  circumstances  shall  trash,  or  construction  debris  be  allowed  to  accumulate.  Trash  removal  must  be
coordinated  through  the  Lincoln  Property  Company  Management  Office.  No  vehicles,  or  dumpsters  will  be  allowed  to
remain stationary on the site.

Under no circumstances is the Landlord’s dumpster to be used.

5.

6.

7.

8.

9.

10.

If any fire sprinkler work, or modification to the fire sprinkler system is required, the system must be back in operation at
the end of the work day. Under no circumstances shall the fire sprinkler system be left inoperative overnight. The facilities
manager must be notified each morning of the location of and type of sprinkler work to be performed. The

11.

12.

13.

14.

15.

16.

17.

18.

19.

engineer hourly rate of $75.00 will be charged for routine work and/or extended regular hour work.

Existing pull stations and horns and strobes located throughout the Building will remain live during construction.

It shall be the responsibility of the general contractor to complete all punch list items before the tenant move-in date or the
stipulated completion date.

All  construction  staging,  storage,  and  temporary  contractor  facilities  will  be  located  in  specific  areas  assigned  by  the
Lincoln  Property  Company.  Contractors  will  be  responsible  for  the  maintenance,  housekeeping,  and  demolition  of  all
temporary facilities.

Any  removal,  replacement,  or  repair  work  to  a  base  building  system  to  accommodate  work  directed  by  the  tenant,  or
unforeseen  interference  (i.e.,  sprinkler  head  conflicts)  which  is  not  part  of  the  Work,  will  be  performed  by  the  tenant’s
contractor at tenant’s sole expense.

No fire arms or weapons are permitted on the property.

Insurance. Contractors will be required to carry standard requirements incorporating both the owner and LPC Commercial
Services, Inc. as additionally insured parties.

At no time is any welding, or cutting with a torch to be used in the building without prior approval and coordination from
the  Management  Office.  Hot  work  permits  may  be  required  depending  on  the  status  of  the  project  for  all  hot  work
including welding, soldering, and torch cutting. All hot work requires a fire extinguisher supplied by the contractor and
must be in the immediate vicinity and easily accessible. Fire extinguishers must be inspected at least monthly.

A  copy  of  these  regulations  shall  be  posted  on  the  job  site  for  all  parties  to  observe.  Contractor  is  responsible  for
instructing all of his personnel, subcontractors and supplies to comply with these regulations.

ALL  PASSENGER  ELEVATORS  AND  PUBLIC  AREAS  SHALL  BE  RESTRICTED  AND  OFF  LIMITS  TO  ALL
CONSTRUCTION  PERSONNEL.  Under  no  circumstances  shall  the  exit  stairwells  be  used  for  access  to/from  the  first
floor. All construction personnel for this project shall only use the freight elevator from the first floor back lobby. Under no
circumstances shall the main entrance to the Building or the garage passenger elevators be used for access.

All deliveries of materials and equipment must be scheduled at least twenty-four (24) hours prior to their delivery through
the Lincoln Property Company Management Office.  The  contractor  will  be  provided  access  to  the  freight  elevator  to  be
used in the “independent mode” for after-hours deliveries. The Contractor shall provide an operator during work hours to
ensure correct and safe usage. Contractor shall keep the elevator cab and door tracks clean and free of all debris. Contractor
shall be responsible for repair costs incurred due to misuse or damage caused by his forces. All major deliveries must be
made between the hours of 11:00 p.m. to 7:00 a.m. Monday through Friday and all day long on Saturday

and Sunday. Contractor will be charged for having an engineer on duty to assist with deliveries when the loading dock is
closed. Additional charges incurred due to non- standard elevator use (i.e., moving freight on top of elevator cab) shall be
paid by the General Contractor.

Your signature below signifies that you have read the rules above and agree to abide by all of them.

Signature

Date

Firm Name

Effective Date:    

 
 
 
 
EXHIBIT 10

TENANT WORK INSURANCE SCHEDULE

Tenant shall, at its own expense, maintain and keep in force, or cause to be maintained and kept in force by any general
contractors,  sub-contractors  or  other  third  party  entities  where  required  by  contract,  throughout  any  period  of  alterations  to  the
Premises or the Building by Tenant, the following insurance coverages:

(1)        Property  Insurance.  “All-Risk”  or  “Special”  Form  property  insurance,  and/or  Builders  Risk  coverage  for  major
renovation projects, including, without limitation, coverage for fire, earthquake and flood; boiler and machinery (if applicable);
sprinkler  damage;  vandalism;  malicious  mischief  coverage  on  all  equipment,  furniture,  fixtures,  fittings,  tenants  work,
improvements  and  betterments,  business  income,  extra  expense,  merchandise,  inventory/stock,  contents,  and  personal  property
located  on  or  in  the  Premises.  Such  insurance  shall  be  in  an  amount  equal  to  the  full  replacement  cost  of  the  aggregate  of  the
foregoing and shall provide coverage comparable to the coverage in the standard ISO “All-Risk” or “Special” form, when such
coverage is supplemented with the coverages required above. Property policy shall also include coverage for Plate Glass, where
required by written contract.

Builders Risk insurance coverage may be provided by the general contractor on a blanket builders risk policy with limits

adequate for the project, and evidencing the additional insureds as required in the Lease.

(2)    Liability Insurance. General Liability, Umbrella/Excess Liability, Workers Compensation and Auto Liability coverage

as follows:

(a) General Liability

$1,000,000 per occurrence
$1,000,000 personal & advertising injury
$2,000,000 products/completed operations aggregate

The General Contractor is required to maintain, during the construction period and up to 3 years after project completion, a
General Liability insurance policy, covering bodily injury, personal injury, property damage, completed operations, with limits to
include  a  $1,000,000  limit  for  blanket  contractual  liability  coverage  and  adding  Landlord  as  additional  insured  as  respects  the
project during construction and for completed operations up to 3 years after the end of the project. Landlord requires a copy of the
ISO 20 10 11 85 Additional Insured endorsement, showing Landlord as an additional insured to the GC’s policy.

(b) Auto Liability

(c) Workers Compensation
Employers Liability

$1,000,000  combined  single  limit  (Any  Auto)  for
bodily  injury  and  property  damage,  hired  and  non-
owned cover.

Statutory Limits
$1,000,000 each accident*
$1,000,000 each employee*
$1,000,000 policy limit*

*  or  such  amounts  as  are  customarily  obtained  by  operators  of  comparable
businesses

General  Contractor  shall  ensure  that  any  and  all  sub-contractors  shall  maintain  equal  limits  of  coverage  for  Workers

Compensation/EL and collect insurance certificates verifying same.

(d) Umbrella/Excess Liability

$25,000,000 per occurrence

(e) Environmental Insurance

To the extent required by Landlord Contractors’
commercial general liability/umbrella insurance
policy(ies) shall include Landlord and Landlord’s
designees as additional insureds’, and shall include a
primary non-contributory provision. Liability policy
shall contain a clause that the insurer may not cancel or
materially change coverage without first giving
Landlord thirty (30) days prior written notice, except
cancellation for non-payment of premium, in which ten
(10)
days prior written notice shall be required.

(3)    Deductibles. If any of the above insurances have deductibles or self-insured retentions, the Tenant and/or contractor

(policy Named Insured) shall be responsible for the deductible amount.

All of the insurance policies required in this Exhibit 10 shall be written by insurance companies which are licensed to do
business  in  the  State  where  the  property  is  located,  or  obtained  through  a  duly  authorized  surplus  lines  insurance  agent  or
otherwise in conformity with the laws of such state, with an A.M. Best rating of at least A and a financial size category of not less
than
VII. Tenant shall provide Landlord with certificates of insurance upon request, prior to commencement of the Tenant/contractor
work,  or  within  thirty  (30)  days  of  coverage  inception  and  subsequent  renewals  or  rewrites/replacements  of  any  cancelled/non-
renewed policies.

Exhibit 10, Page 2

EXHIBIT 11

[Intentionally Omitted]

PLAN—LOADING DOCKS, RECEPTION AREA, AND FREIGHT ELEVATORS

EXHIBIT 12

EMPLOYMENT AGREEMENT

Exhibit 10.54

EMPLOYMENT AGREEMENT ("Agreement") made this 3rd of June 2019 (the "Effective Date") between Dicerna Pharmaceuticals, Inc., a

Delaware corporation ("Company"), on the one hand and Robert Ciappenelli (the "Executive") on the other hand.

WHEREAS, the Company desires to employ the Executive and the Executive desires to be employed by the Company, on terms set forth

herein;

NOW, THEREFORE, in consideration of the mutual agreements set forth herein, the parties agree as follows:

1. Term of Employment. The Executive's employment under this Agreement shall commence on the Effective Date and shall end on such

date as the Executive's employment terminates in accordance with Section 4 of this Agreement. Subject to the balance of this Agreement, the
Executive shall be an at-will employee of the Company whose employment may be terminated (by the Company or by the Executive) at any time,
for any or no reason, in which case the Executive will be entitled to the separation benefits set forth in Section 4, below.

2. Duties. During his employment with the Company, the Executive shall have the title of Chief Commercial Officer. The Executive shall
devote his full business time and effort to the performance of his duties for the Company, which he shall perform faithfully and to the best of his
ability. The Executive shall have all of the customary powers and duties associated with his position and shall be subject to the Company's policies,
procedures, and approval practices, as generally in effect from time to time for all senior executives of the Company and the direction and oversight
of the Board. The Executive will report directly to the President and CEO of the Company.

3. Compensation and Related Matters.

a.    Base Salary. The Company shall pay the Executive base salary at a rate of $15,625 paid twice monthly (which annualizes to

$375,000), less withholdings and deductions required and/or permitted by law. The Executive's base salary shall be paid in conformity with the
Company's payroll practices generally applicable to the Company' s senior executives.

b.    Annual Bonus. The Executive shall be eligible to be considered for an Annual Bonus upon achieving of certain pre-determined

performance targets consistent with any Incentive Compensation Plan established by the Compensation Committee (the "Committee"). The Annual
Bonus shall be based, in part, on the Executive's performance. The grant of such a bonus shall be in the sole discretion of the Committee. The
maximum bonus amount for which the Executive will be eligible is forty percent (40%) of base salary earned for the calendar year. The Annual
Bonus will be earned only after it has been granted by the Committee. The Annual Bonus shall be paid to the Executive following the close of the
fiscal year to which it relates, in no event later than March 15th of the calendar year immediately following the calendar year in which it was
earned. The Executive must be actively employed by the Company at the time the Committee considers granting of bonuses to be eligible to receive
such bonus.

c.    Equity Compensation. Subject to the approval of the Board or an appropriate committee thereof, the Executive shall be eligible for a

stock option grant (the "Grant") to purchase in total up to 300,000 shares of the Company's Common Stock at an exercise price equal to the fair
market value of each share on the date of grant as determined by the Board or an appropriate committee thereof. The Grant shall vest in accordance
with the following schedule: 25% of the shares underlying the Grant will vest on the twelve (12) month anniversary of Executive's commencement
of ful1-time employment with the Company and the remaining shares will vest and become exercisable on a pro rata, monthly basis thereafter on
the same day of the month as the vesting commencement date (or if there is no corresponding day, on the last day of the month), such that

all shares underlying the Grant shall have vested on the fourth anniversary of the vesting commencement date. Vesting of the Grant will be subject to
Executive's continued status as a service provider with the Company at each such vesting period. The Grant will be subject to the terms of a stock plan and
a stock option agreement that the Company and Executive will be required to execute. Except as otherwise provided in an award agreement between the
Executive and the Company, any equity awards granted to the Executive shall vest in full upon a Change of Control of the Company (as defined below).

d. Benefits. During his employment with the Company, the Executive shall be entitled to participate in

All employee benefit plans and programs, including paid sick leave and holidays, life insurance, disability, medical, dental, and retirement savings plans, to
the same extent generally available to senior executives of the Company, in accordance with the terms of those plans and programs. The Executive shall be
permitted up to four weeks of paid vacation per year, which will accrue on a monthly basis. The Executive will not be allowed to accumulate more than three
weeks of unused vacation days at any given time. The Executive may carry over a maximum of five unused vacation days from one calendar year to the next.

e.    Expenses. The Company agrees to reimburse the Executive for reasonable out-of-pocket expenses incurred in connection with Company
business and within standards to be established by the Board from time to time, including, without limitation, travel and accommodations for authorized
business trips, provided vouchers therefore, or other supporting information as the Company may reasonably require, are presented to the Company. All
reimbursements provided under this Agreement shall be made or provided in accordance with the requirements of Section 409A of the Internal Revenue
Code of 1986, as amended (the "Code") and the rules and regulations thereunder ("Section 409A") including, where applicable, the requirement that (i) any
reimbursement is for expenses incurred during the Executive's lifetime (or during a shorter period of time specified in this Agreement); (ii) the amount of
expenses eligible for reimbursement during a calendar year may not affect the expenses eligible for reimbursement in any other calendar year; (iii) the
reimbursement of an
eligible expense shall be made no later than the last day of the calendar year following the year in which the expense is incurred; and (iv) the right to
reimbursement or in-kind benefits is not subject to liquidation or exchange for another benefit.

4. Termination

a.    Rights and Duties. The Executive is an employee "at will." Accordingly, the Company or the Executive may terminate his employment, at

any time with or without cause, for any lawful reason, or no reason. The Executive and the Company agree that, without modifying or altering the
Executive's "at will" status, each will provide the other with at least thirty (30) days' prior written notice of termination of the Executive's employment with
the Company. If the Executive gives notice of termination, except in the case of a termination by the Executive for "Good Reason" as set forth below, such

notice will be deemed a voluntary resignation by the Executive and the Company, in its sole discretion, may elect to relieve the Executive of any obligation
to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive's employment, without changing
the status of such termination as a voluntary resignation by the Executive. Should the Company in the event of a voluntary resignation decide to relieve the
Executive of any obligation to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive's
employment, it shall nonetheless continue his compensation and benefits for the term of the notice period, except that no bonus shall be earned or awarded
during and after the notice period.

b.    Termination for "Good Reason." The Executive may terminate his employment at any time for "Good Reason." "Good Reason" shall

comport with the requirements of Regulation §1.409A  l(n)(2)(ii) and shall mean:

i. A material diminution in the Executive's authority, duties, responsibilities or reporting responsibilities;

ii.A material diminution by the Company of the Executive's annual base compensation then

in effect, except a material diminution generally affecting the members of the Company's management;

iii.    Any action or inaction by the Company that constitutes a material breach by the Company of the terms of this Agreement; or

iv.    A requirement that the Executive be based more than 50 miles from the offices at which he was principally employed

immediately prior to the date of termination.

The parties acknowledge and agree that "Good Reason" shall not be deemed to have occurred unless: (1) the Executive provides the Company
with written notice that he intends to terminate his employment hereunder for one of the Good Reason grounds set forth in Section 4.b. within sixty
(60) days of the initial occurrence of such ground, with such notice containing a description of such ground, (2) if such Good Reason ground is
capable of being cured, the Company has failed to cure such ground within a period of thirty (30) days from the date of such written notice, and (3)
the Executive terminates his employment within ninety-one
(91) days from the date that such Good Reason ground first occurs. For purposes of clarification, the above  listed conditions shall apply separately
to each occurrence of a Good Reason ground, and failure to adhere to such conditions in the event of the occurrence of grounds that would
otherwise have constituted Good Reason had the conditions herein been satisfied shall not disqualify the Executive from asserting and satisfying the
conditions for Good Reason for any subsequent occurrence that may constitute Good Reason.

c.        Termination  by  the  Company  for  Cause.  The  Company  may  terminate  the  Executive's  employment  at  any  time  for  "Cause."

"Cause" shall mean:

i.        The  Executive's  commission  of  an  act  of  fraud,  dishonesty,  breach  of  fiduciary  duty  or  misappropriation  which  may  or  does

adversely affect the Company;

ii.    The Executive's conviction or plea of guilty or nolo contendere to or engaging in any felony or crime involving moral turpitude,
fraud, misrepresentation or other crime and/or indictment for a crime that, in the reasonable opinion of the Company, affects the Executive'
s ability to perform the duties set forth in this Agreement and/or reflects negatively upon the Company;

iii.    Unauthorized disclosure by the Executive of the Company's Proprietary Information, as defined in the Nondisclosure Agreement

(as defined in Section 5 below), which results or could have been reasonably foreseen to result, in a material financial loss to the
Company;

iv.    The Executive's material breach of this Agreement or the Nondisclosure Agreement; provided, that if such breach is reasonably

possible of being cured in the opinion of the Company, then the Executive will be given thirty (30) days after written notice from the
Company of such breach to cure; or

v.    The Executive's failure (which shall not include any Disability as defined below) or refusal to perform the duties and

responsibilities of his employment and/or to follow the policies and procedures of the Company, including without limitation the failure or
refusal to carry out lawful instructions from the Board. If such failure or refusal is reasonably possible of being cured in the opinion of the
Company, then the Executive will be given thirty (30) days after written notice from the Company of such failure or refusal to cure.

d.    Termination in the Event of Death or Disability. The Agreement shall terminate upon the Executive's death or Disability, and the

Executive's employment with the Company shall thereupon terminate. For purposes of the Agreement, "Disability" is defined as any illness, injury,
accident or condition of either a physical or psychological nature as a result of which the Executive is unable to perform the essential functions of
his duties and responsibilities hereunder for 90 days during any period of 365 consecutive calendar days or for any consecutive 90-day period.

e. Effect of Termination.

i. If the Executive is terminated by the Company for Cause, or by the Executive voluntarily

other than for Good Reason, then the Executive will only be entitled to payment when due of any unpaid base salary, expense
reimbursements, and vacation days accrued but unused prior to termination of employment.

ii.    If the Executive's employment is terminated by the Company other than for Cause, or by the Company due to the Executive's
Disability, or by the Executive for Good Reason (each of which will be deemed an involuntary termination), then the Executive will be
entitled to payment when due of any unpaid base salary, expense reimbursements, and vacation days accrued prior to termination of

employment and, in exchange for the Executive's execution of a separation agreement and general release provided by the Company
(including, at the Company's option, a non-competition obligation during any salary continuation period and (at the Company's option) a
revocation period of seven (7) business days) and expressly subject to the conditions described in Section 4.e.v. below, the following:

a)    Continuation of the Executive's base salary at the rate in effect as of the day immediately preceding his date of termination

for a twelve (12) month period, payable in accordance with the Company's regular payroll practices, less applicable withholdings,
commencing at the conclusion of the Review Period (as described below), provided that the first installment of such payments shall
include all amounts which would have been paid during the period between the Executive's date of termination and the date of such
first installment;

b)    Payment of a pro-rata portion of the actual amount of the Executive's Annual Bonus based on actual performance
determined under the terms of the Company's annual bonus program as then in effect, with such pro-rata portion calculated by
multiplying the actual amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which
is the number of days worked by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three
hundred sixty five (365), with such payment to be made after the determination of the bonus funding level (but in no event later than
March 15 of the calendar year following the year in which the Executive's termination occurs); and

c)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the
Executive is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay
the premiums for such group health insurance coverage for the shorter of (i) twelve (12) months or (ii) until the Executive becomes
eligible for health benefits through another employer or otherwise. After the shorter period, the Executive will be responsible for
premium payments for continuation of such group health insurance coverage pursuant to the terms and conditions of COBRA.

iii.    If the Agreement is terminated because of the Executive's death, the Company shall pay to the estate of the Executive the salary
and benefits which would otherwise have been payable to the Executive up to the date of termination of his employment because of death.

iv.    In the event a Change of Control (as defined below) occurs and, if within one (1) year thereafter, the Executive's employment is

terminated by the Company other than for Cause, or by the Company due to the Executive's Disability, or by the Executive for Good
Reason (each of which will be deemed an involuntary termination), then the Executive will be entitled to payment when due of any unpaid
base salary, expense reimbursements, and vacation days accrued prior to termination of employment and, in exchange for the Executive's
execution of a separation agreement and general release provided by the Company (including, at the Company's option, a non-competition
obligation during any salary continuation period and (at the Company's option) a revocation period of seven (7) business days) and
expressly subject to the conditions described in Section 4.e.v. below, the following:

a)    A lump sum payment equal to the sum of (i) one (1) year of the Executive's base salary at the rate in effect as of the day
immediately preceding his date of termination, less applicable withholdings, plus (ii) the Executive's target annual bonus for the year
in which the termination occurs, less applicable withholdings, payable at the conclusion of the Review Period (as described below);

b)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the
Executive is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay
the premiums for such group health insurance coverage for the shorter of (i) one (1) year or (ii) until the Executive becomes eligible
for health benefits through another employer or otherwise. After the shorter period, the Executive will be responsible for premium
payments for continuation of such group health insurance coverage pursuant to the terms and conditions of COBRA; and

c)    Payment of a pro-rata portion of the target amount of the Executive's annual bonus, with such pro-rata portion calculated by
multiplying the target amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which
is the number of days worked by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three
hundred sixty five (365), with such payment to be made at the conclusion of the Review Period (but in no event later than March 15
of the calendar year following the year in which the Executive ' s termination occurs).

For purposes of this Agreement, "Change of Control" means (A) the occurrence of a merger or consolidation of the Company whether or

not approved by the Board, other than (i) a merger or consolidation which would result in the voting securities of the Company outstanding
immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving
entity or the parent of such corporation) at least 50% of the total voting power represented by the voting securities of the Company or such surviving
entity or parent of such corporation outstanding immediately after such merger or consolidation, or (ii) a merger or consolidation which is in effect a
financing transaction for the Company, including, but not limited to, a reverse merger of the Company into a publicly traded "shell" company, or (B)
the stockholders of the Company approve an agreement for the sale or disposition by the Company of all or substantial1y all of the Company's
assets, provided that, in any case, "Change of Control" shall be in accordance with Regulation
§l.409A-3(i)(5).

v.    Payment of the severance pay and benefits described in Section 4.e. ii. or 4.e.iv., as applicable, is expressly conditioned on the

Executive's execution without revocation of the separation agreement and general release described therein, within the time period
prescribed in the separation agreement and general release (which release shall include, at the Company's option, a non-competition
obligation during any salary continuation period and (at the Company's option) a revocation period of seven (7) business days), and will
commence immediately following a sixty (60) day period following the effective date of the Executive's separation from service from the
Company (the "Review Period") (with the exception of the pro rata annual bonus payment described in Section 4.e.ii.b., which shall be
payable after the bonus funding level is determined but in no event later than March 15 of the calendar year following the year in which the
Executive's termination occurs). The separation agreement and general release will be provided to the Executive on or before the fifth (5th)
day following such separation from service. If the Executive fails or refuses to return such agreement within the Review Period, the
applicable severance payments and benefits will be forfeited. If the Executive is eligible for the severance pay and benefits described in
Section 4.e.ii., then he shall not be eligible for and shall not receive the severance pay and benefits described in Section 4.e. iv. Similarly, if

the Executive is eligible for the severance pay and benefits described in Section 4.e.iv., then he shall not be eligible for and shall not
receive the severance pay and benefits described in Section 4.e. ii.

5. Nondisclosure, Non-Solicitation and Assignment Agreement. As a condition of the Executive's employment by the Company and the

payment of compensation and receipt of benefits referred to above, the Executive agrees to continue to be bound by the terms of the standard
Nondisclosure, Non-Solicitation and Assignment Agreement, entered into by the Executive as of June 3, 2019 (the "Nondisclosure Agreement").
The Executive acknowledges that the Company would not offer him employment or provide compensation and/or benefits set forth above if he was
not willing to be bound by the terms of such Nondisclosure Agreement.

6. Notice.

a.    To the Company. The Executive will send all communications to the Company in writing, addressed as follows (or in any other

manner the Company notifies him to use):

CEO

With a copy to:

Douglas M. Fambrough III, Ph.D. President and

Dicerna Pharmaceuticals, Inc. 87 Cambridgepark Drive
Cambridge, MA 02140

General Counsel
Dicerna Pharmaceuticals, Inc. 87 Cambridgepark Drive
Cambridge, MA 02140

b.    To the Executive. All communications from the Company to the Executive relating to this Agreement shall be sent to the Executive

in writing, at the most recent address on file with the Company.

With a copy to:

Robert Ciappenelli
40 Kings Way, Apt 304 B
Waltham, MA 02451

c.    Time Notice Deemed Given. Notice shall be deemed to have been given when delivered or, if earlier (1) three business days after

mailing by United States certified or registered mail, return receipt requested, postage prepaid, or
(2) sent by overnight mail or delivery with confirmation of delivery, in either case, addressed as required in this
section.

7. Amendment. No provisions of this Agreement may be modified, waived, or discharged except by a written document signed by a
Company officer duly authorized by the Board and the Executive. A waiver of any conditions or provisions of this Agreement in a given instance
shall not be deemed a waiver of such conditions or provisions at any other time in the future.

8. Choice of Law; Forum Selection. The validity, interpretation, construction, and performance of this Agreement shall be governed by the
laws of the Commonwealth of Massachusetts without regard to its conflicts of laws principles. Any claims or legal actions by one party against the
other  regarding  this  Agreement  shall  be  commenced  and  maintained  exclusively  in  any  state  or  federal  court  located  in  the  Commonwealth  of
Massachusetts, and the parties hereby submit to the jurisdiction and venue of any such court.

9. Successors. This Agreement shall be binding upon, and shall inure to the benefit of, the Executive and his estate, but the Executive may
not assign or pledge this Agreement or any rights arising under it. Without the Executive's consent, the Company may assign this Agreement to any
affiliate or to a successor to substantially all the business and assets of the Company.

10.Taxes; Code Sections 409A and280G.

a.    The Company shall withhold taxes from payments it makes pursuant to this Agreement as it reasonably determines to be required by

applicable law.

b.    If the benefits set forth in Section 4.e. of this Agreement constitute "non-qualified deferred compensation" subject to Section 409A,

then the following conditions apply to the payment of such benefits:

i.Any termination of the Executive's employment triggering payment of benefits under Section

4.e. must constitute a "separation from service" under Section 409A(a)(2)(A)(i) of the Code, and Treas.Reg.
§1.409A-l(h) before distribution of such benefits can commence. To the extent that the termination of the Executive's employment does
not constitute a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-l(h) (as the result of further
services that are reasonably anticipated to be provided by the Executive to the Company at the time the Executive's employment
terminates), any benefits payable under Section 4.e. that constitute non-qualified deferred compensation under Section 409A shall be
delayed until after the date of a subsequent event constituting a separation of service under Section 409A(a)(2)(A)(i) of the Code and
Treas. Re g.
§1.409A-1(h). For purposes of clarification, this Section shall not cause any forfeiture of benefits on the Executive's part but shall only act
as a delay until such time as a "separation from service" occurs.

ii.    If the Executive is a "specified employee" (as that term is used in Section 409A and regulations and other guidance issued

thereunder) on the date his separation from service becomes effective, any benefits payable under Section 4.e. that constitute non-qualified
deferred compensation subject to Section 409A shall be delayed until the earlier of: (A) the business day following the six-month
anniversary of the date his separation from service becomes effective, or (B) the date of the Executive's death, but only to the extent
necessary to avoid the adverse tax consequences and penalties under Section 409A. On the earlier of: (A) the business day following the
six-month anniversary of the date his separation from service becomes effective, or (B) the Executive' s death, the Company shall pay the
Executive in a lump sum the aggregate value of the non-qualified deferred compensation that the Company otherwise would have paid the
Executive prior to that date under Section 4.e.

iii.    If any amount to be paid to the Executive pursuant to this Agreement is "deferred compensation" subject to Section 409A, then
each such payment which is conditioned upon Executive's execution of a release and which is to be paid or provided during a designated
period that begins in one taxable year and ends in a second taxable year, shall be paid or provided in the later of the two taxable years.

iv. It is intended that each installment of the payments and benefits provided under Section

4.e. shall be treated as a separate "payment" for purposes of Section 409A.

v.    Neither the Company nor the Executive shall have the right to accelerate or defer the delivery of any such payments or benefits

except to the extent specifically permitted or required by Section 409A.

c.    Notwithstanding any other provision of this Agreement to the contrary, in the event of any ambiguity in the terms of this Agreement,

such term(s) shall be interpreted and at all times administered in a manner that avoids the inclusion of compensation in income under Section
409A, or the payment of increased taxes, excise taxes or other penalties under Section 409A.

d.    The parties intend this Agreement to be in compliance with Section 409A. Executive acknowledges and agrees that Company does not

guarantee the tax treatment or tax consequences associated with any payment or benefit arising under this Agreement, including but not limited to
consequences related to Section409A.

e.    If any payment or benefit the Executive would receive under this Agreement, when combined with any other payment or benefit

Executive receives pursuant to a Change of Control (whether under this

Agreement or otherwise) (such payment or benefit, for purposes of this section, a "Payment") would: (i) constitute a "parachute payment" within
the meaning of Section 280G of the Code; and (ii) but for this sentence, be subject to the excise tax imposed by Section 4999 of the Code (the
"Excise Tax"), then such Payment shall be either: (A) the full amount of such Payment; or (B) such lesser amount as would result in no portion of
the Payment being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal, state and local
employments taxes, income taxes, and the Excise Tax, results in Executive's receipt, on an after-tax basis, of the greater amount of the Payment
notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. The Payments will be reduced in the following order: (A)
reduction of any cash severance payments otherwise payable to the Executive that are exempt from Section 409A of the Code; (B) reduction of any
other cash payments or benefits otherwise payable to the Executive that are exempt from Section 409A of the Code, but excluding any payments
attributable to any acceleration of vesting or payments with respect to any equity awards that are exempt from Section 409A of the Code; (C)
reduction of any other payments or benefits otherwise payable to the Executive on a pro-rata basis or such other manner that complies with Section
409A of the Code, but excluding any payments attributable to any acceleration of vesting and payments with respect to any equity awards that are
exempt from Section 409A of the Code; and (D) reduction of any payments attributable to any acceleration of vesting or payments with respect to
any equity awards that are exempt from Section 409A of the Code, in each case beginning with payments that would otherwise be made last in
time.

11. Validity. The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other

provision of this Agreement, which shall remain in full force and effect.

12. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of

which together shall constitute the same instrument.

13. Entire Agreement; Prior Agreements. This Agreement constitutes the entire agreement among the parties with respect to the subject

matter hereof and, unless otherwise provided herein, supersedes all prior agreements, negotiations or understandings, written or oral, in respect
thereof.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

Date:    June 17, 2019 /s/ Douglas M. Fambrough III, PhD.

DICERNA PHARMACEUTICALS, INC.

Douglas M. Fambrough III, Ph.D.
Its: President and CEO

Date: June 19, 2019             /s/ Robert Ciappenelli

Robert Ciappenelli

By: Robert Ciappenelli

Exhibit 10.55

EMPLOYMENT AGREEMENT (Revised)

EMPLOYMENT AGREEMENT (“Agreement”) made this February 21, 2020 (the “Effective Date”) between Dicerna Pharmaceuticals, Inc., a

Delaware corporation (“Company”), on the one hand and Robert Ciappenelli (the “Executive”) on the other hand.

WHEREAS, the Company desires to employ the Executive and the Executive desires to be employed by the Company, on terms set forth herein;

NOW, THEREFORE, in consideration of the mutual agreements set forth herein, the parties agree as follows:

1. Term of Employment. The Executive’s employment under this Agreement shall commence on the Effective Date and shall end on such date as the
Executive’s employment terminates in accordance with Section 4 of this Agreement. Subject to the balance of this Agreement, the Executive shall be an at-
will employee of the Company whose employment may be terminated (by the Company or by the Executive) at any time, for any or no reason, in which
case the Executive will be entitled to the separation benefits set forth in Section 4, below.

2. Duties. During his employment with the Company, the Executive shall have the title of Chief Commercial Officer. The Executive shall devote his
full business time and effort to the performance of his duties for the Company, which he shall perform faithfully and to the best of his ability. The Executive
shall have all of the customary powers and duties associated with his position and shall be subject to the Company’s policies, procedures, and approval
practices, as generally in effect from time to time for all senior executives of the Company and the direction and oversight of the Board. The Executive will
report directly to the Chief Executive Officer of the Company.

3. Compensation and Related Matters.

a.    Base Salary. The Company shall pay the Executive base salary at a rate of $15,941paid twice monthly (which annualizes to $382,583), less

withholdings and deductions required and/or permitted by law. The Executive’s base salary shall be paid in conformity with the Company’s payroll practices
generally applicable to the Company’s senior executives.

b.    Annual Bonus.

The Executive shall be eligible to be considered for an Annual Bonus upon achieving of certain pre-determined performance targets consistent with any
Incentive Compensation Plan established by the Compensation Committee (the “Committee”). The Annual Bonus shall be based, in part, on the Executive’s
performance. The grant of such a bonus shall be in the sole discretion of the Committee. The maximum bonus amount for which the Executive will be
eligible is forty percent (40%)of base salary earned for the calendar year, provided that, the Annual Bonus for the first year of employment shall be prorated
based on the date of hire. The Annual Bonus will be earned only after it has been granted by the Committee. The Annual Bonus shall be paid to the
Executive following the close of the fiscal year to which it relates, in no event later than March 15th of the calendar year immediately following the calendar
year in which it was earned. The Executive must be actively employed by the Company at the time the Committee considers granting of bonuses to be
eligible to receive such bonus.

c.    Equity Compensation. Subject to approval of the Board or an appropriate committee thereof, Executive shall be eligible for equity
compensation awards, in such amounts and subject to such terms as shall be commensurate with awards granted to other senior executives of the Company.

d. Benefits. During his employment with the Company, the Executive shall be entitled to participate in all

employee benefit plans and programs, including paid sick leave and holidays, life insurance, disability, medical, dental, and retirement savings plans, to the
same extent generally available to senior executives of the Company, in accordance with the terms of those plans and programs. The Executive shall be
permitted up to four weeks of paid vacation per year, which will accrue on a monthly basis. The Executive will not be allowed to accumulate more than
three weeks of unused vacation days at any given time. The Executive may carry over a maximum of ten unused vacation days from one calendar year to the
next.

1

e.    Expenses. The Company agrees to reimburse the Executive for reasonable out-of-pocket expenses incurred in connection with Company
business and within standards to be established by the Board from time to time, including, without limitation, travel and accommodations for authorized
business trips, provided vouchers therefor, or other supporting information as the Company may reasonably require, are presented to the Company. All
reimbursements provided under this Agreement shall be made or provided in accordance with the requirements of Section 409A of the Internal Revenue
Code of 1986, as amended (the “Code”) and the rules and regulations thereunder (“Section 409A”) including, where applicable, the requirement that (i) any
reimbursement is for expenses incurred during the Executive’s lifetime (or during a shorter period of time specified in this Agreement); (ii) the amount of
expenses eligible for reimbursement during a calendar year may not affect the expenses eligible for reimbursement in any other calendar year; (iii) the
reimbursement of an eligible expense shall be made no later than the last day of the calendar year following the year in which the expense is incurred; and
(iv) the right to reimbursement or in kind benefits is not subject to liquidation or exchange for another benefit.

4. Termination

a.    Rights and Duties. The Executive is an employee “at will.” Accordingly, the Company or the Executive may terminate his employment, at

any time with or without cause, for any lawful reason, or no reason. The Executive and the Company agree that, without modifying or altering the
Executive’s “at will” status, each will provide the other with at least thirty (30) days’ prior written notice of termination of the Executive’s employment with
the Company. If the Executive gives notice of termination, except in the case of a termination by the Executive for “Good Reason” as set forth below, such
notice will be deemed a voluntary resignation by the Executive and the Company, in its sole discretion, may elect to relieve the Executive of any obligation
to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s employment, without changing
the status of such termination as a voluntary resignation by the Executive. Should the Company in the event of a voluntary resignation decide to relieve the
Executive of any obligation to perform duties during the notice period, waive the notice period and immediately accept termination of the Executive’s
employment, it shall nonetheless continue his compensation and benefits for the term of the notice period, except that no bonus shall be earned or awarded
during and after the notice period.

b.    Termination for “Good Reason.” The Executive may terminate his employment at any time for “Good Reason.” “Good Reason” shall

comport with the requirements of Regulation §1.409A-l(n)(2)(ii) and shall mean:

i. A material diminution in the Executive’s authority, duties, responsibilities or reporting responsibilities;

ii.    A material diminution by the Company of the Executive’s annual base compensation then in effect, except a material diminution

generally affecting the members of the Company’s management;

iii.    Any action or inaction by the Company that constitutes a material breach by the Company of the terms of this Agreement; or

iv.    A requirement that the Executive be based more than 50 miles from the offices at which he was principally employed immediately prior

to the date of termination.

The parties acknowledge and agree that “Good Reason” shall not be deemed to have occurred unless: (1) the Executive provides the Company with
written notice that he intends to terminate his employment hereunder for one of the Good Reason grounds set forth in Section 4.b. within sixty (60) days of
the initial occurrence of such ground, with such notice containing a description of such ground, (2) if such Good Reason ground is capable of being cured,
the Company has failed to cure such ground within a period of thirty (30) days from the date of such written notice, and (3) the Executive terminates his
employment within ninety-one (91) days from the date that such Good Reason ground first occurs. For purposes of clarification, the above-listed conditions
shall apply separately to each occurrence of a Good Reason ground, and failure to adhere to such conditions in the event of the occurrence of grounds that
would otherwise have constituted Good Reason had the conditions herein been satisfied shall not disqualify the Executive from asserting and satisfying the
conditions for Good Reason for any subsequent occurrence that may constitute Good Reason.

c.    Termination by the Company for Cause. The Company may terminate the Executive’s employment at any time for “Cause.” “Cause” shall

mean:

i.    The Executive’s commission of an act of fraud, dishonesty, breach of fiduciary duty or misappropriation which may or does adversely

affect the Company;

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ii.    The Executive’s conviction or plea of guilty or nolo contendere to or engaging in any felony or crime involving moral turpitude, fraud,
misrepresentation or other crime and/or indictment for a crime that, in the reasonable opinion of the Company, affects the Executive’s ability to
perform the duties set forth in this Agreement and/or reflects negatively upon the Company;

iii.    Unauthorized disclosure by the Executive of the Company’s Proprietary Information, as defined in the Nondisclosure Agreement (as

defined in Section 5 below), which results or could have been reasonably foreseen to result, in a material financial loss to the Company;

iv.    The Executive’s material breach of this Agreement or the Nondisclosure Agreement; provided, that if such breach is reasonably possible

of being cured in the opinion of the Company, then the Executive will be given thirty (30) days after written notice from the Company of such
breach to cure; or

v.    The Executive’s failure (which shall not include any Disability as defined below) or refusal to perform the duties and responsibilities of

his employment and/or to follow the policies and procedures of the Company, including without limitation the failure or refusal to carry out lawful
instructions from the Board. If such failure or refusal is reasonably possible of being cured in the opinion of the Company, then the Executive will
be given thirty (30) days after written notice from the Company of such failure or refusal to cure.

d.    Termination in the Event of Death or Disability. The Agreement shall terminate upon the Executive’s death or Disability, and the
Executive’s employment with the Company shall thereupon terminate. For purposes of the Agreement, “Disability” is defined as any illness, injury, accident
or condition of either a physical or psychological nature as a result of which the Executive is unable to perform the essential functions of his duties and
responsibilities hereunder for 90 days during any period of 365 consecutive calendar days or for any consecutive 90-day period.

e. Effect of Termination.

i.    If the Executive is terminated by the Company for Cause, or by the Executive voluntarily other than for Good Reason, then the Executive

will only be entitled to payment when due of any unpaid base salary, expense reimbursements, and vacation days accrued but unused prior to
termination of employment.

ii.    If the Executive’s employment is terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability,

or by the Executive for Good Reason (each of which will be deemed an involuntary termination), then the Executive will be entitled to payment
when due of any unpaid base salary, expense reimbursements, and vacation days accrued prior to termination of employment and, in exchange for
the Executive’s execution of a separation agreement and general release provided by the Company (including, at the Company’s option, a non-
competition obligation during any salary continuation period and (at the Company’s option) a revocation period of seven (7) business days) and
expressly subject to the conditions described in Section 4.e.vi. below, the following:

a)    Continuation of the Executive’s base salary at the rate in effect as of the day immediately preceding his date of termination for a
twelve (12) month period, payable in accordance with the Company’s regular payroll practices, less applicable withholdings, commencing at
the conclusion of the Review Period (as described below), provided that the first installment of such payments shall include all amounts
which would have been paid during the period between the Executive’s date of termination and the date of such first installment;

b)    Payment of a pro-rata portion of the actual amount of the Executive’s Annual Bonus based on actual performance determined

under the terms of the Company’s annual bonus program as then in effect, with such pro-rata portion calculated by multiplying the actual
amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the number of days worked
by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three hundred sixty five (365), with such
payment to be made after the determination of the bonus funding level (but in no event later than March 15 of the calendar year following
the year in which the Executive’s termination occurs); and

c)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) twelve (12) months or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for

3

premium payments for continuation of such group health insurance coverage pursuant to the terms and conditions of COBRA.

iii.    If the Agreement is terminated because of the Executive’s death, the Company shall pay to the estate of the Executive the salary and

benefits which would otherwise have been payable to the Executive up to the date of termination of his employment because of death.

iv.    In the event of a Change of Control (as defined below) occurs and, if within one (1) year thereafter, the Executive’s employment is
terminated by the Company other than for Cause, or by the Company due to the Executive’s Disability, or by the Executive for Good Reason (each
of which will be deemed an involuntary termination), then the Executive will be entitled to payment when due of any unpaid base salary, expense
reimbursements, and vacation days accrued prior to termination of employment and, in exchange for the Executive’s execution of a separation
agreement and general release provided by the Company (including, at the Company’s option, a non-competition obligation during any salary
continuation period and (at the Company’s option) a revocation period of seven (7) business days) and expressly subject to the conditions
described in Section 4.e.vi. below, the following:

a)    A lump sum payment equal to the sum of (i) one (1) year of the Executive’s base salary at the rate in effect as of the day
immediately preceding his date of termination, less applicable withholdings, plus (ii) the Executive’s target annual bonus for the year in
which the termination occurs, less applicable withholdings, payable at the conclusion of the Review Period (as described below);

b)    The Executive shall be eligible to continue health benefits pursuant to COBRA or the appropriate state equivalent. If the Executive
is eligible for and properly elects continuation of such coverage during the permissible time frame, the Company will pay the premiums for
such group health insurance coverage for the shorter of (i) one (1) year or (ii) until the Executive becomes eligible for health benefits
through another employer or otherwise. After the shorter period, the Executive will be responsible for premium payments for continuation of
such group health insurance coverage pursuant to the terms and conditions of COBRA; and

c)    Payment of a pro-rata portion of the target amount of the Executive’s annual bonus, with such pro-rata portion calculated by
multiplying the target amount of such bonus for the year in which such termination occurs by a number: (x) the numerator of which is the
number of days worked by the Executive during the fiscal year prior to termination, and (y) the denominator of which is three hundred sixty
five (365), with such payment to be made at the conclusion of the Review Period (but in no event later than March 15 of the calendar year
following the year in which the Executive’s termination occurs).

v.     In addition, in the event of a Change of Control, notwithstanding anything to the contrary in any applicable option agreement or stock-
based award agreement, all time-based stock options and other time-based stock-based awards held by the Executive, to the extent unvested as of
immediately prior to the Change of Control shall immediately accelerate and become fully exercisable or nonforfeitable immediately prior to the
consummation of the Change of Control.

For purposes of this Agreement, “Change of Control” means (A) the occurrence of a merger or consolidation of the Company whether or not

approved by the Board, other than (i) a merger or consolidation which would result in the voting securities of the Company outstanding immediately prior
thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity or the parent of such
corporation) at least 50% of the total voting power represented by the voting securities of the Company or such surviving entity or parent of such
corporation outstanding immediately after such merger or consolidation, or (ii) a merger or consolidation which is in effect a financing transaction for the
Company, including, but not limited to, a reverse merger of the Company into a publicly traded “shell” company, or (B) the stockholders of the Company
approve an agreement for the sale or disposition by the Company of all or substantially all of the Company’s assets, provided that, in any case, “Change of
Control” shall be in accordance with Regulation §1.409A-3(i)(5).

vi.    Payment of the severance pay and benefits described in Section 4.e.ii. or 4.e.iv., as applicable, is expressly conditioned on the

Executive’s execution without revocation of the separation agreement and general release described therein, within the time period prescribed in
the separation agreement and general release (which release shall include, at the Company’s option, a non-competition obligation during any salary

4

continuation period and (at the Company’s option) a revocation period of seven (7) business days), and will commence immediately following a
sixty (60) day period following the effective date of the Executive’s separation from service from the Company (the “Review Period”) (with the
exception of the pro rata annual bonus payment described in Section 4.e.ii.b., which shall be payable after the bonus funding level is determined
but in no event later than March 15 of the calendar year following the year in which the Executive’s termination occurs). The separation agreement
and general release will be provided to the Executive on or before the fifth (5th) day following such separation from service. If the Executive fails
or refuses to return such agreement within the Review Period, the applicable severance payments and benefits will be forfeited. If the Executive is
eligible for the severance pay and benefits described in Section 4.e.ii., then he shall not be eligible for and shall not receive the severance pay and
benefits described in Section 4.e.iv. Similarly, if the Executive is eligible for the severance pay and benefits described in Section 4.e.iv., then he
shall not be eligible for and shall not receive the severance pay and benefits described in Section 4.e.ii.

5. Nondisclosure, Non-Solicitation and Assignment Agreement. As a condition of the Executive’s employment by the Company and the payment
of compensation and receipt of benefits referred to above, the Executive agrees to continue to be bound by the terms of the standard Nondisclosure, Non-
Solicitation and Assignment Agreement, entered into by the Executive as of 5/23/2019 (the “Nondisclosure Agreement”). The Executive acknowledges
that the Company would not offer him employment or provide compensation and/or benefits set forth above if he was not willing to be bound by the terms
of such Nondisclosure Agreement.

6. Notice.

a.    To the Company. The Executive will send all communications to the Company in writing, addressed as follows (or in any other manner the

Company notifies him to use):

Douglas M. Fambrough III, Ph.D. President and CEO
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

With a copy to:

General Counsel
Dicerna Pharmaceuticals, Inc.
33 Hayden Ave
Lexington, MA 02140

b.    To the Executive. All communications from the Company to the Executive relating to this Agreement shall be sent to the Executive in

writing, at the most recent address on file with the Company.

With a copy to:

Robert Ciappenelli
35 Kings Way Unit 3
Waltham, MA 02451

c.    Time Notice Deemed Given. Notice shall be deemed to have been given when delivered or, if earlier (1) three business days after mailing by

United States certified or registered mail, return receipt requested, postage prepaid, or
(2) sent by overnight mail or delivery with confirmation of delivery, in either case, addressed as required in this section.

7. Amendment. No provisions of this Agreement may be modified, waived, or discharged except by a written document signed by a Company officer

duly authorized by the Board and the Executive. A waiver of any conditions or provisions of this Agreement in a given instance shall not be deemed a
waiver of such conditions or provisions at any other time in the future.

5

8. Choice of Law; Forum Selection. The validity, interpretation, construction, and performance of this Agreement shall be governed by the laws of
the Commonwealth of Massachusetts without regard to its conflicts of laws principles. Any claims or legal actions by one party against the other regarding
this Agreement shall be commenced and maintained exclusively in any state or federal court located in the Commonwealth of Massachusetts, and the parties
hereby submit to the jurisdiction and venue of any such court.

9. Successors. This Agreement shall be binding upon, and shall inure to the benefit of, the Executive and his estate, but the Executive may not assign

or pledge this Agreement or any rights arising under it. Without the Executive’s consent, the Company may assign this Agreement to any affiliate or to a
successor to substantially all the business and assets of the Company.

10. Taxes; Code Sections 409A and 280G.

a.    The Company shall withhold taxes from payments it makes pursuant to this Agreement as it reasonably determines to be required by

applicable law.

b.    If the benefits set forth in Section 4.e. of this Agreement constitute “non-qualified deferred compensation” subject to Section 409A, then the

following conditions apply to the payment of such benefits:

i.    Any termination of the Executive’s employment triggering payment of benefits under Section 4.e. must constitute a “separation from

service” under Section 409A(a)(2)(A)(i) of the Code, and Treas. Reg.
§1.409A-1(h) before distribution of such benefits can commence. To the extent that the termination of the Executive’s employment does not
constitute a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h) (as the result of further services that
are reasonably anticipated to be provided by the Executive to the Company at the time the Executive’s employment terminates), any benefits
payable under Section 4.e. that constitute non-qualified deferred compensation under Section 409A shall be delayed until after the date of a
subsequent event constituting a separation of service under Section 409A(a)(2)(A)(i) of the Code and Treas. Reg. §1.409A-1(h). For purposes of
clarification, this Section shall not cause any forfeiture of benefits on the Executive’s part, but shall only act as a delay until such time as a
“separation from service” occurs.

ii.    If the Executive is a “specified employee” (as that term is used in Section 409A and regulations and other guidance issued thereunder) on
the date his separation from service becomes effective, any benefits payable under Section 4.e. that constitute non-qualified deferred compensation
subject to Section 409A shall be delayed until the earlier of: (A) the business day following the six-month anniversary of the date his separation
from service becomes effective, or (B) the date of the Executive’s death, but only to the extent necessary to avoid the adverse tax consequences
and penalties under Section 409A. On the earlier of: (A) the business day following the six-month anniversary of the date his separation from
service becomes effective, or (B) the Executive’s death, the Company shall pay the Executive in a lump sum the aggregate value of the non-
qualified deferred compensation that the Company otherwise would have paid the Executive prior to that date under Section 4.e.

iii.    If any amount to be paid to the Executive pursuant to this Agreement is “deferred compensation” subject to Section 409A, then each
such payment which is conditioned upon Executive’s execution of a release and which is to be paid or provided during a designated period that
begins in one taxable year and ends in a second taxable year, shall be paid or provided in the later of the two taxable years.

iv.    It is intended that each installment of the payments and benefits provided under Section 4.e. shall be treated as a separate “payment” for

purposes of Section 409A.

v.    Neither the Company nor the Executive shall have the right to accelerate or defer the delivery of any such payments or benefits except to

the extent specifically permitted or required by Section 409A.

c.    Notwithstanding any other provision of this Agreement to the contrary, in the event of any ambiguity in the terms of this Agreement, such

term(s) shall be interpreted and at all times administered in a manner that avoids the
inclusion of compensation in income under Section 409A, or the payment of increased taxes, excise taxes or other penalties under Section 409A.

d.    The parties intend this Agreement to be in compliance with Section 409A. Executive acknowledges and agrees that Company does not

guarantee the tax treatment or tax consequences associated with any payment or benefit arising under this Agreement, including but not limited to
consequences related to Section 409A.

6

e.    If any payment or benefit the Executive would receive under this Agreement, when combined with any other payment or benefit Executive

receives pursuant to a Change of Control (whether under this Agreement or otherwise) (such payment or benefit, for purposes of this section, a “Payment”)
would: (i) constitute a “parachute payment” within the meaning of Section 280G of the Code; and (ii) but for this sentence, be subject to the excise tax
imposed by Section 4999 of the Code (the “Excise Tax”), then such Payment shall be either: (A) the full amount of such Payment; or (B) such lesser amount
as would result in no portion of the Payment being subject to the Excise Tax, whichever of the foregoing amounts, taking into account the applicable federal,
state and local employments taxes, income taxes, and the Excise Tax, results in Executive’s receipt, on an after-tax basis, of the greater amount of the
Payment notwithstanding that all or some portion of the Payment may be subject to the Excise Tax. The Payments will be reduced in the following order:
(A) reduction of any cash severance payments otherwise payable to the Executive that are exempt from Section 409A of the Code;
(B) reduction of any other cash payments or benefits otherwise payable to the Executive that are exempt from Section 409A of the Code, but excluding any
payments attributable to any acceleration of vesting or payments with respect to any equity awards that are exempt from Section 409A of the Code; (C)
reduction of any other payments or benefits otherwise payable to the Executive on a pro-rata basis or such other manner that complies with Section 409A of
the Code, but excluding any payments attributable to any acceleration of vesting and payments with respect to any equity awards that are exempt from
Section 409A of the Code; and (D) reduction of any payments attributable to any acceleration of vesting or payments with respect to any equity awards that
are exempt from Section 409A of the Code, in each case beginning with payments that would otherwise be made last in time.

11. Validity. The invalidity or unenforceability of any provision of this Agreement shall not affect the validity or enforceability of any other

provision of this Agreement, which shall remain in full force and effect.

12. Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed to be an original but all of which

together shall constitute the same instrument.

13.

Entire Agreement; Prior Agreements. This Agreement constitutes the entire agreement among the parties with respect to the subject matter

hereof and, unless otherwise provided herein, supersedes all prior agreements, negotiations or understandings, written or oral, in respect thereof.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

7

DICERNA PHARMACEUTICALS, INC.

Date: 2/21/2020

/s/ Douglas M. Fambrough III, PhD.

III, Ph.D.

Its: President and CEO

Date: 2/21/2020

/s/ Robert Ciappenelli

8

By: Douglas Fambrough

Robert Ciappenelli
Chief Commercial Officer

Exhibit 10.56

February 26, 2020

John B. Green
91 Elliott Drive
Lowell, MA 01852

Re:    Transition Agreement

Dear Jack:

Dicerna Pharmaceuticals, Inc. (the “Company”) greatly appreciates your dedication and service to the Company. You and I have
discussed our mutual interest in bringing your employment to an end and doing so in a manner that provides a smooth transition for
both you and the Company. This letter agreement (the “Agreement”) confirms terms that we have discussed concerning your
continued employment for a limited period, the termination of your employment, severance pay and benefits and consulting terms.
Under this Agreement, you will have the opportunity to receive the same post-employment severance pay and benefits that are
available under your February 21, 2020 Employment Agreement (Revised) with the Company (the “Employment Agreement”) plus
certain bonus and equity enhancements in exchange for your performance of consulting services through June 30, 2021.

This Agreement amends the Employment Agreement and the Amended and Restated Indemnification Agreement dated April 11,
2017 between you and the Company (the “Indemnification Agreement”). It also amends certain Equity Documents, as defined
below.

Specifically, you and the Company agree as follows:

1.

Transition Period

(a)

Hire of New CFO and Termination of Employment. The Company is currently engaged in a search for a new Chief
Financial Officer (the “New CFO”). The Company anticipates continuing your employment as Chief Financial
Officer through the date of the commencement of employment of the New CFO (the “New CFO Hire Date”) and
possibly for a limited period beyond the New CFO Hire Date. To the extent that your employment continues beyond
the New CFO Hire Date, you shall be transitioned to a senior advisor role with a title and responsibilities as
determined by the Company. Consistent with the Employment Agreement, the Company reserves the right to
terminate your employment at any time and shall not be required to provide the thirty (30) days’ written notice
pursuant to Section 4(a) of the Employment Agreement. The period of your employment from the Effective Date (as
defined below) to the date of termination of your employment, which in no event will be later than June 30, 2021, is

(b)

(c)

(d)

referred to in this Agreement as the “Transition Period.” The date of termination of your employment is referred to
as the “Termination Date.”

Responsibilities. During the Transition Period, you shall use your reasonable best efforts to perform the
responsibilities that are assigned to you. For such period that you remain Chief Financial Officer, you shall perform
the responsibilities of that function, consistent with Section 2 of the Employment Agreement; provided that
notwithstanding anything to the contrary in Section 2 of the Employment Agreement, your title, authority and
responsibilities may be modified by the Company’s President and CEO at any time during the remaining period of
your employment with the Company. You hereby waive any and all rights to terminate your employment for “Good
Reason” based upon a material diminution in your authority, duties, responsibilities or title pursuant to Section 4(b)
(i) of the Employment Agreement. You acknowledge that your responsibilities during the remaining period of your
employment may include assisting in the recruitment, interview and hire of the New CFO.

Compensation. During the Transition Period, your at-will employment shall continue on a full-time basis, you will
be paid at the rate of your current base salary, which is $415,800 per year (the “Base Salary”), and your
compensation terms with respect to benefits and expenses pursuant to Sections 3(d) and 3(e) of the Employment
Agreement shall continue in effect.

Acknowledgment. You acknowledge that as of the Company’s most recent payroll payment of salary to you, you
were fully paid for all salary then due to you. You acknowledge that as of the date of this letter, your accrued but
unused vacation time totaled two (2) days (in the amount of $2,987.24). You shall continue to accrue and be eligible
to use paid vacation time in accordance with the Company’s policies during the Transition Period.

2.Severance Benefits

Provided that (i) you fully comply at all times with your obligations pursuant to this Agreement and the Nondisclosure,
Noncompetition and Assignment Agreement dated January 1, 2015 and signed on January 14, 2016 (the “Confidentiality
Agreement”), including the post-employment non-competition and non-solicitation obligations you entered into with the Company;
(ii) you remain employed with the Company until the Termination Date that is hereafter designated by the Company unless you
terminate your employment for “Good Reason” under Section 4(b)(ii), (iii) or (iv) of the Employment Agreement; and (iii) there is
no “Cause” for termination of your employment as defined in Section 4(c) of the Employment Agreement (together, the
“Conditions”), you will be eligible for the following “Severance Benefits.”

(a)

Severance Pay. The Company shall pay you severance pay (“Severance Pay”) consisting of salary continuation at
your Base Salary rate, less applicable tax-related deductions and withholdings, effective for the 12-month period
immediately following the Termination Date (the “Severance Pay Period”). Severance Pay shall be payable in
accordance with the Company’s regular payroll practices. Notwithstanding anything to the contrary in the foregoing
or in the

2

(b)

(c)

Employment Agreement, the Company shall not be obligated to continue the payment of the Severance Pay if you
do not sign the Release Agreement attached to this Agreement as Exhibit A within the twenty-one (21) day time
period set forth in the Release Agreement or if you revoke the Release Agreement after signing it. The Release
Agreement shall be deemed to be tendered to you upon the Termination Date; provided that the Company may
substitute a substantially identical Release Agreement in place of Exhibit A and tender such Release Agreement on
or promptly after the Termination Date. You are not authorized to sign the Release Agreement before the
Termination Date.

Bonus. Notwithstanding anything to the contrary in your Employment Agreement or otherwise, the Company shall
pay you a bonus payment based on the Company’s calendar year 2020 corporate goal achievements (the “Annual
Bonus”); provided, subject to your continued satisfaction of the Conditions. For calendar year 2020, the target
Annual Bonus shall be forty percent (40%) of the Base Salary, and the actual amount shall be determined in the sole
discretion of the Company’s Board of Directors (the “Board”) based on the full calendar year 2020 as if you had
been an employee of the Company for the entire year and based on the achievement of corporate objectives, as
determined by the Board. The Annual Bonus shall be paid to you at the same time bonus payments are made to
senior executives, but in no event later than March 15, 2021. You acknowledge and agree that your opportunity to
receive the Annual Bonus set forth in this Section 2(b) is in lieu of any bonus or incentive compensation payments
otherwise due to you pursuant to the Employment Agreement or otherwise.

Health Benefits. If you elect continuation of group medical, dental and vision insurance coverage pursuant to the law
known as “COBRA,” the Company shall pay the premiums for such group medical, dental and vision coverage as in
effect for you on the Termination Date until the earliest of the following: (i) the end of the Consulting Period (as
defined below) or the end of the Severance Pay Period, whichever occurs later; (ii) your eligibility for group medical
care coverage through other employment; or (iii) the end of your eligibility under COBRA for continuation coverage
for medical, dental and vision care (the Company’s payment of such premiums, the “Health Benefits”).
Notwithstanding anything to the contrary in the foregoing or the Employment Agreement, the Company shall not be
obligated to continue the Health Benefits if you do not sign the Release Agreement within the twenty-one (21) day
time period set forth in the Release Agreement or if you revoke the Release Agreement after signing it. You agree to
notify the Company promptly if you become eligible for group medical care coverage through another employer.
You also agree to respond promptly and fully to any reasonable requests for information by the Company concerning
your eligibility for such coverage. After the conclusion of the Company’s payment of Health Benefits, you may
continue coverage at your own expense for the remainder of the COBRA continuation period, subject to continued
eligibility.

3

For the avoidance of doubt, you acknowledge and agree that the Severance Benefits provided for in this Section 2 and the bonus
pursuant to Section 4(b) below satisfy and replace the Company’s severance pay and benefits obligations pursuant to Section 4(e)
of the Employment Agreement.

3.Consulting Period

Subject to the Conditions, the Company shall retain you as an independent contractor to provide consulting services as reasonably
requested by the Company during the period from the Termination Date to June 30, 2021, or an earlier or later date consistent with
the terms of this Agreement (the “Consulting Period”), provided, however, that the Consulting Period shall continue only if you
also sign the Release Agreement within the time period set forth in the Release Agreement and do not revoke the Release
Agreement. Such consulting services may consist of any transitional assistance, any responsibilities of a Chief Financial Officer or
any other responsibilities that the Company may reasonably request (“Consulting Services”). For the avoidance of any doubt, your
transition from employment status during the Transition Period to independent contractor status during the Consulting Period shall
constitute a “separation from service” for purposes of Section 409A(a)(2)(A)(i) of the Internal Revenue Code of 1986, as amended
(the “Code”), and Treas. Reg. § 1.409A-1(h). The parties confirm that they expect that at least for an initial period following the
Termination Date, the Consulting Services are not expected to exceed forty (40) hours in any 30-day period; provided that this
statement of the parties’ expectations does not limit the Company’s right to increase the expectation to perform Consulting Services
beyond such level, subject to the terms of Section 3(d) below.

(a)

(b)

Services. During the Consulting Period, you shall perform Consulting Services at reasonable times requested by the
Company; provided that the Company shall not require you to provide any services at any times that would
materially interfere with your other commitments, unless Section 5(c) below is applicable.

Equity. For the avoidance of doubt, your performance of and availability to perform Consulting Services during the
Consulting Period constitute a continued service relationship with the Company for purposes of the Equity
Documents, as defined below. As a result, your unvested equity as of the Termination Date shall continue to vest
until the end of the Consulting Period. At the conclusion of the Consulting Period, you shall be eligible to exercise
all vested equity awards pursuant to the terms of the Equity Documents (i.e., three (3) months from the end of the
Consulting Period, but no later than the expiration date of the award). The “Equity Documents” mean all options
that you hold to purchase shares of the Company’s common stock pursuant to the Company’s Notice of Grant of
Stock Option dated April 14, 2016, the Company’s Annual Stock Option Grant Notice dated January 3, 2017, the
Company’s Stock Option Grant Notice dated January 4, 2018, the Company’s Stock Option Grant Notice dated
January 2, 2019, the Company’s Notice of Grant of Stock Option dated January 8, 2020, the associated Terms and
Conditions of each such grant, as may be amended from time to time, the Company’s Amended and Restated 2014
Performance Incentive Plan, as amended and restated on May 7, 2019, and as may be further amended from time to
time and the restricted stock award that you were granted pursuant to the

4

(c)

(d)

(e)

Restricted Stock Unit Grant Notice dated January 8, 2020 and the related Restricted Stock Unit Award Agreement.

Equity Acceleration. As further consideration for your performance of and availability to perform Consulting
Services during the Consulting Period, and notwithstanding anything to the contrary in the Equity Documents, you
shall have the opportunity to fully vest in all time-based stock options and other time-based stock-based awards held
by you (the “Time-Based Equity Awards”) if certain events occur during the Consulting Period; provided that you
continue to satisfy all of the Conditions. More specifically, if during the Consulting Period, the Company executes a
letter of intent or an equivalent agreement with a potential acquirer contemplating a Change of Control (as defined
in the Employment Agreement) (such letter or agreement, an “LOI”), then upon the consummation of the Change of
Control, all Time-Based Equity Awards held by you to the extent unvested as of immediately prior to the Change of
Control shall immediately accelerate and become fully exercisable or nonforfeitable upon the consummation of the
Change of Control. To effectuate this provision, any termination or forfeiture of the unvested portion of the Time-
Based Equity Awards that would otherwise occur at the conclusion of the Consulting Period in the absence of this
Agreement will be delayed unless and until the effective date of the consummation of the Change of Control, subject
to the timely execution of an LOI. For the avoidance of doubt, notwithstanding anything to the contrary in the
foregoing, in no event will the Time-Based Equity Awards vest or become exercisable after their respective
expiration dates provided in the applicable Equity Documents.

Increased Services; Extension. In the event that the Company requests that you provide Consulting Services for
more than forty (40) hours in any 30-day period during the Consulting Period, the Consulting Period shall
automatically extend in 30-day increments, subject to the Company’s continued request that you provide Consulting
Services for more than forty (40) hours in any 30-day period. In the event the Consulting Period is automatically
extended, the Company will confer with you and consider providing you with additional compensation in
recognition of your performance of such increased Consulting Services. For the avoidance of doubt, such increase in
Consulting Services may be due, without limitation, to a need as determined by the Company for you to resume the
performance of services as the Company’s Chief Financial Officer.

Independent Contractor Status. During the Consulting Period, you shall act solely as an independent contractor and
this Agreement shall not be construed to create any employee/employer relationship between you and the Company.
You shall accept any directions issued by the Company pertaining to the goals to be attained and the results to be
achieved by you in providing Consulting Services, but you shall be solely responsible for the manner in which you
perform such Consulting Services. You shall not be eligible to participate in any employee benefit plans or
programs, including without limitation life insurance, disability, medical, dental, vision and retirement savings plans
during the Consulting Period. You shall also

5

not be eligible for workers’ compensation coverage or participation as an employee in the Social Security or
unemployment compensation programs with respect to your performance of Consulting Services during the
Consulting Period.

(f)

Your Termination Right. Notwithstanding anything in the foregoing to the contrary, you shall have the right to
terminate the Consulting Period upon thirty (30) days’ prior written notice to the Company.

4.Tax Treatment

The Company shall make deductions, withholdings and tax reports with respect to payments and benefits under this Agreement that
it reasonably determines to be required. Payments under this Agreement shall be in amounts net of any such deductions or
withholdings. Nothing in this Agreement shall be construed to require the Company to make any payments to compensate you for
any adverse tax effect associated with any payments or benefits or for any deduction or withholding from any payment or benefit.

5.Communications

The Company shall consult with you regarding the text for material public disclosure concerning your anticipated termination of
employment. You shall reasonably cooperate with the Company with respect to any such disclosure or other general
communication regarding your termination and transition to service as a consultant.

6.Continuing Obligations

You acknowledge that your obligations under the Confidentiality Agreement shall continue in effect, including without limitation
your obligations to maintain the confidentiality of Confidential Information as defined in the Confidentiality Agreement, to return
documents and other property of the Company, to cooperate with the Company with respect to the procurement, maintenance and
enforcement of intellectual property rights, and to refrain from certain competitive and solicitation activities for a period of two (2)
years following the end of your employment. A copy of the Confidentiality Agreement is enclosed as Exhibit B. You acknowledge
and agree that the terms and obligations of the Confidentiality Agreement are hereby incorporated by reference as material terms of
this Agreement. You further agree that notwithstanding anything to the contrary in the Confidentiality Agreement, your obligation
not to disclose Confidential Information, as defined in Section 5 of the Confidentiality Agreement, shall apply to Confidential
Information that is disclosed to you during the Consulting Period. In addition, you agree that notwithstanding anything to the
contrary in the Confidentiality Agreement, your disclosure and assignment obligations provided in Section 7 of the Confidentiality
Agreement shall apply to Developments, as defined in Section 7(a) of the Confidentiality Agreement, during the Consulting Period.

7.Return of Property

You shall not dispose of the Company property (including information or documents, including computerized data and any copies
made of any computerized data or software (“Documents”)), without authorization. Upon the end of the Consulting Period and
earlier if so requested by the

6

Company, you shall return to the Company all Company property including, without limitation, computer equipment, software,
keys and access cards, credit cards, files and any Documents containing information concerning the Company, its business or its
business relationships (in the latter two cases, actual or prospective). After returning all Company property, you commit to deleting
and finally purging any duplicates of files or documents that may contain Company information from any non-Company computer
or other device that remains your property after the date of your obligation to return Company property.

8.Non-Disparagement

You agree not to make or endorse any disparaging, derogatory, adverse, and/or otherwise negative remarks and/or statements
(whether oral, written, or otherwise) concerning the Company or its current or former officers, directors, partners, shareholders,
investors, business partners or employees; provided that if any current or former officer, director, partner, shareholder, investor,
business partner or employee makes any disparaging, derogatory, adverse, and/or otherwise negative remarks and/or statements
(whether oral, written, or otherwise) concerning you, you shall no longer be subject to this Section 8 with respect to remarks and/or
statements about such current or former officer, director, partner, shareholder, investor, business partner or employee; and provided
further that statements shall not be considered to be subject to this Section 8 if they are made reasonably and in good faith in
connection with the performance of responsibilities for the Company. These non-disparagement obligations shall not in any way
affect your obligation to provide truthful information consistent with the law or legal process.

9.Future Cooperation

During the Transition Period, the Consulting Period and thereafter, you agree to cooperate reasonably with the Company (including
its outside counsel) in connection with (i) the contemplation, prosecution and defense of all phases of existing, past and future
litigation about which the Company believes you may have knowledge or information; and (ii) responding to requests for
information from regulatory agencies or other governmental authorities (together. the “Cooperation Services”). You further agree to
make yourself available to provide Cooperation Services at mutually convenient times during and outside of regular business hours
as reasonably deemed necessary by the Company’s counsel. The Company shall not utilize this section to require you to make
yourself available to an extent that would materially interfere with other commitments that you may have. Cooperation Services
include, without limitation, appearing without the necessity of a subpoena to testify truthfully in any legal proceedings in which the
Company calls you as a witness. The Company shall reimburse you for any reasonable travel expenses that you incur due to your
performance of Cooperation Services, after receipt of appropriate documentation consistent with the Company’s business expense
reimbursement policy.

10.Protected Disclosures; Defend Trade Secrets Act of 2016

Nothing in this Agreement shall be interpreted or applied to prohibit you from making any good faith report to any governmental
agency or other governmental entity (a “Government Agency”) concerning any act or omission that you reasonably believe
constitutes a possible violation of federal or state law or making other disclosures that are protected under the anti-retaliation or
whistleblower provisions of applicable federal or state law or regulation. In addition, nothing

7

contained in this Agreement limits your ability to communicate with any Government Agency or otherwise participate in any
investigation or proceeding that may be conducted by any Government Agency, including your ability to provide documents or
other information, without notice to the Company. In addition, for the avoidance of doubt, pursuant to the federal Defend Trade
Secrets Act of 2016, you shall not be held criminally or civilly liable under any federal or state trade secret law or under this
Agreement or the Confidentiality Agreement for the disclosure of a trade secret that (a) is made (i) in confidence to a federal, state,
or local government official, either directly or indirectly, or to an attorney; and (ii) solely for the purpose of reporting or
investigating a suspected violation of law; or (b) is made in a complaint or other document filed in a lawsuit or other proceeding, if
such filing is made under seal.

11.Termination of Payments

If you breach any of your obligations under this Agreement or Confidentiality Agreement, in addition to any other legal or
equitable remedies it may have for such breach, the Company shall have the right to terminate its payments to you or for your
benefit under this Agreement. The termination of such payments in the event of your breach will not affect your continuing
obligations under this Agreement.

12.Non-Admission

This Agreement shall not be construed as an admission of any liability by the Company to you or of any act of wrongdoing by the
Company.

13.Legally Binding

This Agreement is a legally binding document and your signature will commit you to its terms. The Company has advised you to
consult with counsel before entering into this Agreement. You acknowledge that you have carefully read and fully understand all of
the provisions of this Agreement and that you are voluntarily entering into this Agreement.

14.Absence of Reliance

In signing this Agreement, you are not relying upon any promises or representations made by anyone at or on behalf of the
Company.

15.Enforceability

If any portion or provision of this Agreement (including, without limitation, any portion or provision of any section of this
Agreement as well as any portion or provision of any section of the Confidentiality Agreement) shall to any extent be declared
illegal or unenforceable by a court of competent jurisdiction, then the remainder of this Agreement, or the application of such
portion or provision in circumstances other than those as to which it is so declared illegal or unenforceable, shall not be affected
thereby, and each portion and provision of this Agreement shall be valid and enforceable to the fullest extent permitted by law.

8

16.Waiver

No waiver of any provision of this Agreement shall be effective unless made in writing and signed by the waiving party. The failure
of any party to require the performance of any term or obligation of this Agreement, or the waiver by any party of any breach of
this Agreement, shall not prevent any subsequent enforcement of such term or obligation or be deemed a waiver of any subsequent
breach.

17.Jurisdiction

You and the Company hereby agree that the Superior Court of the Commonwealth of Massachusetts and the United States District
Court for the District of Massachusetts shall have the exclusive jurisdiction to consider any matters related to this Agreement,
including without limitation any claim for violation of this Agreement. With respect to any such court action, you (i) submit to the
exclusive jurisdiction of such courts, (ii) consent to service of process, and (iii) waive any other requirement (whether imposed by
statute, rule of court or otherwise) with respect to personal jurisdiction or venue.

18.Governing Law; Interpretation

This Agreement shall be interpreted and enforced under the laws of the Commonwealth of Massachusetts, without regard to
conflict of law principles. In the event of any dispute, this Agreement is intended by the parties to be construed as a whole, to be
interpreted in accordance with its fair meaning, and not to be construed strictly for or against either you or the Company or the
“drafter” of all or any portion of this Agreement.

19.Entire Agreement; Effective Date

This Agreement constitutes the entire agreement between you and the Company. This Agreement supersedes any previous
agreements or understandings between you and the Company except that the Employment Agreement, the Confidentiality
Agreement, the Indemnification Agreement, the Equity Documents (each of the foregoing as modified herein), and any other
obligations specifically preserved in this Agreement remain in full force and effect. This Agreement shall become effective on the
date when it becomes fully executed (the “Effective Date”).

20.Indemnification Agreement

Notwithstanding anything to the contrary in your Indemnification Agreement, the Company’s obligations to indemnify you under
the Indemnification Agreement shall apply to any action that you take while acting as an employee or independent contractor of the
Company to the same extent as they apply to actions by you while acting as an officer of the Company.

21.Counterparts

This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be taken to
be an original, but all of which together shall constitute

9

one and the same document. Facsimile and PDF signatures shall be deemed to have the same legal effect as originals.

[Signature page follows]

10

Please indicate your agreement to the terms of this Agreement by signing and returning to Regina DeTore Paglia
(rpaglia@dicerna.com) the original or a PDF of this letter.

Sincerely,

DICERNA PHARMACEUTICALS, INC.

By:    /s/ Douglas M. Fambrough III, Ph.D        February 27, 2020    

Douglas M. Fambrough III, Ph.D.        Date
President, Chief Executive Officer

The foregoing is agreed to and accepted by:

/s/ John B. Green        February 27, 2020    
John B. Green                             Date

Enclosures:    Release Agreement (Exhibit A)

Confidentiality Agreement (Exhibit B)

11

EXHIBIT A

RELEASE AGREEMENT

Background

You acknowledge that in connection with the termination of your employment with Dicerna Pharmaceuticals, Inc. (the
“Company”), you entered into a letter agreement with a letter date of February 21, 2020 (the “Transition Agreement”). All
capitalized terms used and not defined herein shall have the same meanings as set forth in the Transition Agreement. You
understand that this is the “Release Agreement” referenced in the Transition Agreement. You understand that this Release
Agreement shall be deemed tendered to you upon the Termination Date unless the Company substitutes a substantially
identical release Agreement in place of this one and tenders such Release Agreement on or promptly after the Termination
Date. You further understand that you may not sign this Release Agreement until after the Termination Date but that you
must return it to the Company on or before the expiration of the Consideration Period (as defined below).

Release and Related Terms

1.

Release of Claims. In consideration for, among other terms, your eligibility for the Severance Benefits, which you

acknowledge you would otherwise not be entitled, you voluntarily release and forever discharge the Company, its affiliated and
related entities, including, without limitation, its and their respective predecessors, successors and assigns, its and their respective
employee benefit plans and fiduciaries of such plans, and the current and former officers, directors, shareholders, partners,
employees, attorneys, accountants and agents of each of the foregoing in their official and personal capacities (collectively referred
to as the “Releasees”) generally from all claims, demands, debts, damages and liabilities of every name and nature, known or
unknown (“Claims”) that, as of the date when you sign this Release Agreement, you have, ever had, now claim to have or ever
claimed to have had against any or all of the Releasees. This release includes, without limitation, all Claims:

•

•

•

•

•

•

•

relating to your employment with the Company;

of wrongful discharge;

of breach of contract;

of retaliation or discrimination under federal, state or local law (including, without limitation, Claims of discrimination
or retaliation under the Americans with Disabilities Act, the Age Discrimination in Employment Act, Title VII of the
Civil Rights Act of 1964, and Massachusetts Gen. Law c. 151B);

under any other federal or state statute;

of defamation or other torts;

of violation of public policy;

        
•

•

for wages, bonuses, incentive compensation, commissions, stock, stock options, vacation pay or any other compensation
or benefits, including under the Massachusetts Wage Act, M.G.L. c. 149, §§148-150C, or otherwise; and

for damages or other remedies of any sort, including, without limitation, compensatory damages, punitive damages,
injunctive relief and attorney’s fees;

provided, however, that this release shall not affect your vested rights under the Company’s 401(k) plan or your rights under the
Release Agreement or the Transition Agreement.

You agree not to accept damages of any nature, other equitable or legal remedies for your own benefit or attorney’s fees or costs
from any of the Releasees with respect to any Claim released by this Release Agreement. As a material inducement to the
Company to enter into this Release Agreement, you represent that you have not assigned any Claim to any third party.

2.

Confidentiality Agreement. You acknowledge that your obligations under the Confidentiality Agreement shall

continue in effect, including without limitation your obligations to maintain the confidentiality of Confidential Information as
defined in the Confidentiality Agreement, to return documents and other property of the Company, to cooperate with the Company
with respect to the procurement, maintenance and enforcement of intellectual property rights, and to refrain from certain
competitive and solicitation activities for a period of two (2) years following the end of your employment; provided, however, that
this Release Agreement hereby amends Sections 2, 3, and 4 in the Confidentiality Agreement such that the non-competition and
non-solicitation covenants shall continue for two (2) years following the end of the Consulting Period. You acknowledge and agree
that the terms and obligations of the Confidentiality Agreement are hereby incorporated by reference as material terms of this
Release Agreement.

3.

Termination of Payments. In the event that you breach any of your obligations under this Release Agreement or

the Transition Agreement or otherwise fail to continue to satisfy the Conditions, in addition to any other legal or equitable remedies
it may have for such breach, the Company shall have the right to terminate its payments to you or for your benefit under this
Release Agreement or the Transition Agreement. The termination of such payments in the event of your breach will not affect your
continuing obligations under this Release Agreement or the Transition Agreement.

4.

Absence of Reliance. In signing this Release Agreement, you are not relying upon any promises or representations

made by anyone at or on behalf of the Company, other than as set forth herein or in the Transition Agreement.

5.

Enforceability. If any portion or provision of this Release Agreement (including, without limitation, any portion or
provision of any section of this Release Agreement) shall to any extent be declared illegal or unenforceable by a court of competent
jurisdiction, then the remainder of this Release Agreement, or the application of such portion or provision in circumstances other
than those as to which it is so declared illegal or unenforceable, shall not be affected thereby, and each portion and provision of this
Release Agreement shall be valid and enforceable to the fullest extent permitted by law.

2

6.

Waiver. No waiver of any provision of this Release Agreement shall be effective unless made in writing and

signed by the waiving party. The failure of a party to require the performance of any term or obligation of this Release Agreement,
or the waiver by a party of any breach of this Release Agreement, shall not prevent any subsequent enforcement of such term or
obligation or be deemed a waiver of any subsequent breach.

7.

Time for Consideration; Release Effective Date. You acknowledge that you have knowingly and voluntarily

entered into this Release Agreement and that the Company advises you to consult with an attorney before signing this Release
Agreement. You understand and acknowledge that you have been given the opportunity to consider this Release Agreement for
twenty-one (21) days from the day it was deemed tendered to you on the Termination Date before signing it (the “Consideration
Period”). To accept this Release Agreement, you must return a signed original or a signed PDF copy of this Release Agreement so
that it is received by Regina DeTore Paglia (rpaglia@dicerna.com) at or before the expiration of the Consideration Period. If you
sign this Release Agreement before the end of the Consideration Period, you acknowledge that such decision was entirely voluntary
and that you had the opportunity to consider this Release Agreement for the entire Consideration Period. For the period of seven (7)
business days from the date when you sign this Release Agreement, you have the right to revoke this Release Agreement by written
notice to Ms. DeTore Paglia, provided that such notice is delivered so that it is received at or before the expiration of the seven (7)
business day revocation period. This Release Agreement shall not become fully effective during the revocation period. This
Release Agreement shall become fully effective on the first business day following the expiration of the revocation period.

8.

Protected Disclosures. Nothing contained in this Release Agreement or otherwise limits your ability to file a

charge or complaint or communicate with any federal, state or local governmental agency or commission (a “Government
Agency”). In addition, nothing contained in this Release Agreement or otherwise limits your ability to participate in any
investigation or proceeding that may be conducted by any Government Agency, including your ability to provide documents or
other information, without notice to the Company, nor does anything contained in this Release Agreement apply to truthful
testimony. If you file any charge or complaint with any Government Agency and if the Government Agency pursues any claim on
your behalf, or if any other third party pursues any claim on your behalf, you waive any right to monetary or other individualized
relief (either individually, or as part of any collective or class action); provided that nothing in this Agreement limits any right that
you may have to receive a whistleblower award or other bounty for information provided to the Securities and Exchange
Commission.

9.

Jurisdiction. You and the Company hereby agree that the Superior Court of the Commonwealth of Massachusetts
and the United States District Court for the District of Massachusetts shall have the exclusive jurisdiction to consider any matters
related to this Agreement, including without limitation any claim for violation of this Agreement. With respect to any such court
action, you (i) submit to the exclusive jurisdiction of such courts, (ii) consent to service of process, and (iii) waive any other
requirement (whether imposed by statute, rule of court or otherwise) with respect to personal jurisdiction or venue.

3

10.

Governing Law; Interpretation. This Agreement shall be interpreted and enforced under the laws of the

Commonwealth of Massachusetts, without regard to conflict of law principles. In the event of any dispute, this Release Agreement
is intended by the parties to be construed as a whole, to be interpreted in accordance with its fair meaning, and not to be construed
strictly for or against either you or the Company or the “drafter” of all or any portion of this Release Agreement.

11.

Entire Agreement. This Release Agreement constitutes the entire agreement between you and the Company. This

Release Agreement supersedes any previous agreements or understandings between you and the Company, except the Transition
Agreement, the Confidentiality Agreement (as modified herein and in the Transition Agreement), the Equity Documents (as
modified in the Transition Agreement), the Indemnification Agreement (as modified by the Transition Agreement) and any other
obligations specifically preserved in this Release Agreement or the Transition Agreement.

[Signature page follows]

4

I HAVE READ THIS RELEASE AGREEMENT THOROUGHLY, UNDERSTAND ITS TERMS, HAVE HAD AT LEAST
21 DAYS TO CONSIDER IT BEFORE SIGNING, AND HAVE SIGNED IT KNOWINGLY AND VOLUNTARILY. I
UNDERSTAND THAT THIS RELEASE AGREEMENT IS A LEGAL DOCUMENT. I ACKNOWLEDGE THAT I HAVE
BEEN ADVISED BY THE COMPANY TO DISCUSS ALL ASPECTS OF THIS RELEASE AGREEMENT WITH MY
ATTORNEY AND THAT I HAVE DONE SO IF I SO CHOOSE.

________________________________ 
John B. Green

________________________________ 
Date

Accepted and agreed:

DICERNA PHARMACEUTICALS, INC.

By:                

Douglas M. Fambrough III, Ph.D.        Date

President, Chief Executive Officer

5

SUBSIDIARIES OF DICERNA PHARMACEUTICALS, INC.

Name

Exhibit 21.1

Jurisdiction of Incorporation
Delaware

England

Ireland

Germany

Dicerna Security Corporation

Dicerna EU Limited

Dicerna Ireland Limited

Dicerna Germany GmbH

 
 
 
 
 
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statements No. 333-234572 on Form S-3ASR, Nos. 333-202687, 333-214082, 333-223778, and
333-224989 on Form S-3 and in Registration Statement Nos. 333-193795, 333-210071, 333-223648, and 333-233149 on Form S-8 of our reports dated
February 27, 2020, relating to the consolidated financial statements of Dicerna Pharmaceuticals, Inc. and the effectiveness of Dicerna Pharmaceuticals, Inc.'s
internal control over financial reporting, appearing in this Annual Report on Form 10-K of Dicerna Pharmaceuticals, Inc. for the year ended December 31,
2019.

Exhibit 23.1

/s/ Deloitte & Touche LLP

Boston, Massachusetts
February 27, 2020

Exhibit 31.1

I, Douglas M. Fambrough, III, Ph.D., certify that:

CERTIFICATIONS

1. I have reviewed this Annual Report on Form 10-K of Dicerna Pharmaceuticals, Inc. for the year ended December 31, 2019;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the

statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements and other financial information included in this report, fairly present in all material respects the

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in

Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for
the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure

that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly
during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision,
to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance
with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness

of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal

quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the
registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the

registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely

to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over

financial reporting.

Date: February 27, 2020

/s/ Douglas M. Fambrough, III, Ph.D.

Douglas M. Fambrough, III, Ph.D.

Chief Executive Officer and Director

 
Exhibit 31.2

I, John B. Green, certify that:

CERTIFICATIONS

1. I have reviewed this Annual Report on Form 10-K of Dicerna Pharmaceuticals, Inc. for the year ended December 31, 2019;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the

statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements and other financial information included in this report, fairly present in all material respects the

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in

Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for
the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure

that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly
during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision,
to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance
with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness

of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal

quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the
registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the

registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely

to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over

financial reporting.

Date: February 27, 2020

/s/ John B. Green

John B. Green

Chief Financial Officer

 
 
SECTION 1350 CERTIFICATIONS*

Exhibit 32.1

Pursuant to the requirement set forth in Rule 13a-14(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and Section 1350 of

Chapter 63 of Title 18 of the United States Code (18 U.S.C. § 1350), Douglas M. Fambrough, III, Ph.D., Chief Executive Officer and Director of Dicerna
Pharmaceuticals, Inc. (the “Company”), and John B. Green, Chief Financial Officer of the Company, each hereby certifies that, to the best of his knowledge:

1. The Company’s Annual Report on Form 10-K, for the year ended December 31, 2019, to which this Certification is attached as Exhibit 32.1 (the

“Annual Report”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Annual Report fairly presents, in all material respects, the financial condition and results of operations of the

Company for the period covered by the Annual Report.

Dated: February 27, 2020

/s/ Douglas M. Fambrough, III, Ph.D.

Douglas M. Fambrough, III, Ph.D.

/s/ John B. Green

    John B. Green

Chief Executive Officer and Director
________________
* This certification accompanies the Annual Report on Form 10-K, to which it relates, is not deemed filed with the Securities and Exchange Commission

    Chief Financial Officer

and is not to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of
1934, as amended (whether made before or after the date of the Form 10-K), irrespective of any general incorporation language contained in such filing.