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Idera Pharmaceuticals, Inc.

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FY2019 Annual Report · Idera Pharmaceuticals, Inc.
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 10-K

þ

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

For the Fiscal Year Ended December 31, 2019

OR

¨

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

Commission File Number: 001-31918

IDERA PHARMACEUTICALS, INC.

(Exact name of Registrant as specified in its charter)

Delaware
(State or other jurisdiction
of incorporation or organization)

505 Eagleview Blvd., Suite 212
Exton, Pennsylvania
(Address of principal executive offices)

04-3072298
(I.R.S. Employer
Identification No.)

19341
(Zip Code)

(484) 348-1600
(Registrant’s telephone number, including area code)

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

Title of Each Class:
Common Stock, $.001 par value

Trading Symbol
IDRA

Name of Each Exchange on Which Registered
Nasdaq Capital 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  ☐    No  ☑

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

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  ☑    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  ☑    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

☐

☐  

Accelerated filer

Smaller reporting company

Emerging growth company

☒

☒

☐

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 Exchange Act.)    Yes  ☐    No   ☑ 

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant was $63.6 million based on the last sale

price of the registrant’s common stock as reported on the Nasdaq Capital Market on June 28, 2019 (the last business day of the registrant’s most recently
completed second fiscal quarter).

As of February 15, 2020, the registrant had 30,538,478 shares of common stock 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 of this Form
10-K where indicated. Such definitive proxy statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the year ended
December 31, 2019.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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IDERA PHARMACEUTICALS, INC.
FORM 10-K

TABLE OF CONTENTS

Item 1.  Business
Item 1A.  Risk Factors
Item 1B.  Unresolved Staff Comments
Item 2.  Properties
Item 3.  Legal Proceedings
Item 4.  Mine Safety Disclosures

PART I. 

PART II. 

Item 5.  Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity

Securities

Item 6.  Selected Financial Data
Item 7.  Management’s Discussion and Analysis of Financial Condition and Results of Operations
Item 7A.  Quantitative and Qualitative Disclosures about Market Risk
Item 8.  Financial Statements and Supplementary Data
Item 9.  Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Item 9A.  Controls and Procedures
Item 9B.  Other Information

PART III. 

Item 10.  Directors, Executive Officers and Corporate Governance
Item 11.  Executive Compensation
Item 12.  Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Item 13.  Certain Relationships and Related Transactions, and Director Independence
Item 14.  Principal Accountant Fees and Services

Item 15.  Exhibits and Financial Statement Schedules
Item 16.  Form 10-K Summary

__________________________________

PART IV. 

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Unless the context otherwise indicates, references in this Annual Report on Form 10-K to “Idera,” “the Company,”

“we,” “us” and “our” refer to Idera Pharmaceuticals, Inc.

IMO  and Idera  are our trademarks. All other trademarks and service marks appearing in this Annual Report on

®

®

Form 10-K are the property of their respective owners.

Unless otherwise indicated, all share and per share amounts, including the exercise or conversion price of any of our

securities, reflect, as applicable, the occurrence of a 1-for-8 reverse split of our common stock that occurred on July 27,
2018.

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NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K (“Form 10-K”) and the documents we incorporate by reference contain 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, included or incorporated in this report regarding our strategy, future operations, collaborations,
intellectual property, cash resources, financial position, future revenues, projected costs, prospects, plans and objectives of
management are forward-looking statements. The words “believes,” “anticipates,” “estimates,” “plans,” “expects,”
“intends,” “may,” “could,” “should,” “potential,” “likely,” “projects,” “continue,” “will,” “schedule,” “would” and similar
expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these
identifying words. We cannot guarantee that we actually will achieve the plans, intentions or expectations disclosed in our
forward-looking statements and you should not place undue reliance on our forward-looking statements. These forward-
looking statements involve known and unknown risks, uncertainties, and other factors, which may be beyond Idera’s
control, and which may cause the actual results, performance, or achievements of the Company to be materially different
from future results, performance, or achievements expressed or implied by such forward-looking statements.

There are a number of important factors that could cause our actual results to differ materially from those indicated

or implied by forward-looking statements. These important factors include those set forth below under Part I, Item 1A
“Risk Factors.” These factors and the other cautionary statements made in this Annual Report on Form 10-K and the
documents we incorporate by reference should be read as being applicable to all related forward-looking statements
whenever they appear in this Annual Report on Form 10-K and the documents we incorporate by reference.

In addition, any forward-looking statements represent our estimates only as of the date that this Annual Report on
Form 10-K is filed with the Securities and Exchange Commission (“SEC”) and should not be relied upon as representing
our estimates as of any subsequent date. All forward-looking statements included in this Annual Report on Form 10-K are
made as of the date hereof, and are expressly qualified in their entirety by this cautionary notice. We do not assume any
obligation to update any forward-looking statements. We disclaim any intention or obligation to update or revise any
forward-looking statement, whether as a result of new information, future events or otherwise, except as may be required
by law.

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Item 1.

Business.

Overview

PART I.

We are a clinical-stage biopharmaceutical company with a business strategy focused on the clinical development,
and ultimately the commercialization, of drug candidates for both oncology and rare disease indications characterized by
small, well-defined patient populations with serious unmet medical needs. Our current focus is on our Toll-like receptor, or
TLR, agonist, tilsotolimod (IMO-2125), for oncology. We believe we can develop and commercialize targeted therapies on
our own. To the extent we seek to develop drug candidates for broader disease indications, we have entered into and may
explore additional collaborative alliances to support development and commercialization.

TLRs are key receptors of the immune system and play a role in innate and adaptive immunity. As a result, we

believe TLRs are potential therapeutic targets for the treatment of a broad range of diseases. Using our chemistry-based
platform, we designed both TLR agonists and antagonists to act by modulating the activity of targeted TLRs. A TLR
agonist is a compound that stimulates an immune response through the targeted TLR. A TLR antagonist is a compound that
inhibits an immune response by blocking the targeted TLR.

Our current TLR-targeted clinical-stage drug candidate, tilsotolimod, is an agonist of TLR9. We are currently
developing tilsotolimod, via intratumoral injection, for the treatment of anti-PD1 refractory metastatic melanoma in
combination with ipilimumab, an anti-CTLA4 antibody marketed as Yervoy® by Bristol-Myers Squibb Company (“BMS”)
in a Phase 3 registration trial. We are also evaluating intratumoral tilsotolimod in combination with nivolumab, an anti-PD1
antibody marketed as Opdivo® by BMS, and ipilimumab for the treatment of multiple solid tumors in a multicohort Phase
2 trial.

Clinical Development

Tilsotolimod (IMO-2125)

Tilsotolimod (IMO-2125) is a synthetic phosphorothioate oligonucleotide that acts as a direct agonist of TLR9 to
stimulate the innate and adaptive immune systems. Tilsotolimod is being developed for administration via intratumoral
injection in combination with systemically administered checkpoint inhibitors for the treatment of various solid tumors,
including (i) anti-PD1 refractory metastatic melanoma in combination with ipilimumab, (ii) microsatellite stable (“MSS”)
colorectal cancer (“CRC”) in combination with nivolumab and ipilimumab, and (iii) squamous cell carcinoma of the head
and neck (“SCCHN”) in combination with ABBV-368 and other combinations. We refer to our tilsotolimod development
program as the ILLUMINATE development program. See additional information under the heading “Collaborative
Alliances” for information on the development of tilsotolimod in collaboration with AbbVie for patients with SCCHN.

Advancements in cancer immunotherapy have included the approval and late-stage development of multiple

checkpoint inhibitors, which are therapies that target mechanisms by which tumor cells evade detection by the immune
system. Despite these advancements, many patients fail to respond to these therapies. For instance, approximately 50% of
patients with melanoma fail to respond to therapy with approved checkpoint inhibitors. Current published data suggests that
the lack of response to checkpoint inhibition is related to a non-immunogenic tumor microenvironment. We believe TLR9
agonists may be useful in melanoma and other solid tumor types that are refractory to anti-PD1 treatment due, in part, to
low mutation load and low dendritic cell infiltration. Because TLR9 agonists, such as tilsotolimod, stimulate the immune
system, we believe there is a scientific rationale to evaluate the combination of intratumoral injection of tilsotolimod with
checkpoint inhibitors. Specifically, we believe intratumoral injection of tilsotolimod activates a local immune response in
the injected tumor, which may complement the effect of the systemically administered checkpoint inhibitors. Currently,
there is minimal immunotherapy benefit, post chemotherapy, for patients with SCCHN and are no approved
immunotherapy options for patients with MSS-CRC.

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In studies conducted in our laboratories, intratumoral injection of TLR9 agonists, such as tilsotolimod, has
potentiated the antitumor activity of multiple checkpoint inhibitors in preclinical tumor models. We believe these data
support evaluation of combination regimens including the combination of a TLR9 agonist, such as tilsotolimod, with one or
more checkpoint inhibitors for the treatment of cancer.

Melanoma

Melanoma is a cancer that begins in a type of skin cell called melanocytes. While melanoma is one of the least
common types of skin cancer, it has a poor prognosis when not detected and treated early. As is the case in many forms of
cancer, melanoma becomes more difficult to treat once the disease has spread, or metastasized, beyond the skin to other
parts of the body. According to the American Cancer Society, approximately 100,000 people in the United States will be
diagnosed with invasive melanoma this year. In recent years, pioneering immunotherapies known as checkpoint inhibitors
have changed the treatment of advanced melanoma and have become the standard of care, with anti-PD-1 agents being the
most commonly used immunotherapy in the first-line setting. These agents work by increasing the ability of the body’s
immune system to help detect and fight cancer cells. However, due to primary or acquired resistance mechanisms that
exclude or inhibit anti-tumor immune cells, as many as 60% of patients do not benefit from this type of therapy, and up to
one-third of initial responders develop resistance to the therapy and ultimately experience disease progression. Today, these
refractory patients are left with few options for further treatment, paving the way for novel investigational therapies such as
tilsotolimod. 

We are currently developing tilsotolimod for use in combination with checkpoint inhibitors for the treatment

of patients with anti-PD1 refractory metastatic melanoma. Tilsotolimod has received Orphan Drug Designation for the
treatment of melanoma Stages IIb to IV and Fast Track designation for the treatment of anti-PD1 refractory metastatic
melanoma in combination with ipilimumab therapy from the U.S. Food and Drug Administration (“FDA”).

ILLUMINATE-301 - Phase 3 Trial of Tilsotolimod (IMO-2125) in Combination with Ipilimumab in Patients with
Anti-PD1 Refractory Metastatic Melanoma

In the first quarter of 2018, we initiated a Phase 3 trial of the tilsotolimod–ipilimumab combination in patients with
anti-PD1 refractory metastatic melanoma, which we refer to as ILLUMINATE-301.  This trial will compare the results of
the tilsotolimod–ipilimumab combination to those of ipilimumab alone in a 1:1 randomization. This trial originally targeted
a sample size of 308 patients and was expected to be conducted at up to 110 sites worldwide. The family of primary
endpoints of the trial are overall response rate (“ORR”) by RECIST v1.1 and median overall survival (“OS”). We believe
positive results in either of the primary endpoints could lead to approval in the United States. Key secondary endpoints
include ORR by immune-related RECIST, durable response rate, median time to response, median progression free
survival (“PFS”) and patient-reported outcomes using a validated scale.

Following feedback from the ILLUMINATE-301 Steering Committee and global melanoma and immunology

experts, we elected to make several modifications to the ILLUMINATE-301 trial design which better reflect the current
treatment landscape in anti-PD-1 refractory melanoma and increase the probability of success in the trial. We are currently
targeting a median OS improvement over ipilimumab alone of greater than or equal to 4.6 months, compared to 6.6 months
originally targeted, and an ORR improvement of 10 percentage points over ipilimumab alone, compared to 20 percentage
points originally targeted. Accordingly, the target effect size or hazard ratio has been adjusted to 0.71 from 0.63.  In order
to maintain statistical power, the sample size was increased to 454 patients from the original target sample size of 308
patients. We solicited feedback from the FDA and they did not object to these changes.  We have also received approval
from other global health authorities related to these changes. In March 2020, we completed target enrollment for
ILLUMINATE-301.

 As discussed below under the heading “Collaborative Alliances,” in May 2018, we entered into a clinical trial

collaboration and supply agreement with BMS under which BMS has agreed to supply YERVOY® (ipilimumab), at its
cost and for no charge to us, for use in ILLUMINATE-301, including for the increase in sample size.

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ILLUMINATE-204 - Phase 1/2 Trial of Tilsotolimod (IMO-2125) in Combination with Ipilimumab or
Pembrolizumab in Patients with Anti-PD1 Refractory Metastatic Melanoma

In December 2015, we initiated a Phase 1/2 clinical trial to assess the safety and efficacy of intratumoral tilsotolimod

in combination with ipilimumab, in patients with metastatic melanoma (refractory to treatment with a PD1 inhibitor, also
referred to as anti-PD1 refractory), which we refer to as ILLUMINATE-204. We subsequently amended the trial protocol to
include an additional treatment arm to study the combination of tilsotolimod with pembrolizumab, an anti-PD1 antibody
marketed as Keytruda® by Merck & Co., Inc., in the same patient population. The Phase 2 expansion of our
ILLUMINATE-204 trial closed for enrollment in February 2019 with a total of 52 patients dosed at 8 mg tilsotolimod in
combination with ipilimumab, 49 of which are evaluable for safety and efficacy.

In this clinical trial, tilsotolimod is administered intratumorally into a selected tumor lesion at weeks 1, 2, 3, 5, 8, 11,

17, 23 and 29, for a total of nine doses, together with the standard dosing regimen of ipilimumab or pembrolizumab,
administered intravenously. For patients who lack superficially accessible disease for injection, tilsotolimod is administered
via injection into deep lesions, such as liver metastases, using interventional radiology guidance.

The trial was initiated at The University of Texas, MD Anderson Cancer Center (“MD Anderson”) under the
strategic research alliance we entered into with MD Anderson in June 2015, and additional sites were added through the
fourth quarter of 2018.  The primary objectives of the Phase 1 portion of the trial include characterizing the safety of the
combinations and determining the recommended Phase 2 dose. A secondary objective of the Phase 1 portion of the trial is
describing the antitumor activity of tilsotolimod when administered intratumorally in combination with ipilimumab or
pembrolizumab. Objectives of the Phase 2 portion of the trial are to determine the objective response rate to the
combinations using immune-related response criteria (“irRC”) and RECIST v1.1 criteria.  Additional objectives of the
Phase 2 portion of the trial include determination of median PFS and median OS, and to continue to characterize the safety
of the combinations. In the Phase 1 portion of the trial, serial biopsies were taken of selected injected and non-injected
tumor lesions pre- and post-24 hours of the first dose of tilsotolimod, as well as at 8 and 13 weeks, to assess immune
changes and response assessments. In the Phase 2 portion of the trial, biopsies were optional.

Ipilimumab Arm

In the Phase 1 portion of the ipilimumab arm of our Phase 1/2 clinical trial of tilsotolimod, escalating doses of
tilsotolimod ranging from 4 mg through 32 mg were evaluated in a total of 18 patients, all but one who had progressed on
nivolumab or pembrolizumab prior to enrollment in the trial.  The combination of tilsotolimod and ipilimumab was
generally well-tolerated at all dose levels studied. In April 2017, we completed tilsotolimod dose escalation and, based on
the safety and efficacy data and data from translational immune parameters, selected the 8 mg dose level as the
recommended dose level for the Phase 2 portion of the ipilimumab arm of the trial.

In April 2017, we initiated enrollment in the Phase 2 portion of the ipilimumab arm of our Phase 1/2 clinical trial of
tilsotolimod with the 8 mg dose of intratumoral tilsotolimod. The Phase 2 portion of the trial utilizes a two-stage design to
evaluate the objective response rate of tilsotolimod in combination with ipilimumab, compared to historical data for
ipilimumab alone in the anti-PD1 refractory metastatic melanoma population. Based on the responses observed, the trial
advanced with the expansion of the ipilimumab-tilsotolimod combination arm of ILLUMINATE-204 at the recommended
Phase 2 dose of 8 mg tilsotolimod.

The Phase 2 ipilimumab-tilsotolimod combination arm of the ILLUMINATE-204 trial closed for enrollment in
February 2019 with a total of 52 patients dosed at the recommended Phase 2 dose.  As of August 5, 2019, of the 49 subjects
evaluable for efficacy, 13 had a response representing a best overall response rate of 27%. Of the 13 responders, four were
unconfirmed responses. Additionally, 36 of the 49 patients achieved stable disease or better, representing a disease control
rate of 74%. Durable responses (>6 months) were observed in 5 of 9 confirmed responses per RECIST v1.1. Median
overall survival (OS) had not yet been reached (min/max: 1.6 months/35 months).  

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We subsequently examined the four unconfirmed responders (of the 13 responders noted above) out of the 49
subjects evaluable for efficacy.  As of October 23, 2019, two subjects were confirmed per RECIST v1.1 criteria, one
remained unconfirmed, and one experienced disease progression.  As for disease control, 35 of the 49 patients achieved
stable disease or better (71%). Durable responses (greater than six months) were observed in five of 10 confirmed
responses per RECIST v1.1 criteria who were evaluable for durability. The safety profile observed is consistent with
previously reported results.

Other key findings from the trial include data demonstrating a systemic antitumor effect on distant uninjected tumors
in patients who received tilsotolimod in combination with ipilimumab. Also, data showing clinical responses were observed
in patients whose tumors had low HLA-ABC expression before treatment was started. Since HLA-ABC expression is
required for ipilimumab antitumor activity (Rodig, 2018), evidence of clinical responses in patients with low HLA-ABC
expression supports the contribution of tilsotolimod’s mechanism of action to overcome resistance to ipilimumab in tumors
with this HLA-ABC expression profile. This information suggests that tilsotolimod has the potential to enhance the overall
response rate compared to that expected with ipilimumab alone.

Pembrolizumab Arm

In the Phase 1 portion of the pembrolizumab arm of our Phase 1/2 clinical trial of tilsotolimod, we evaluated

escalating doses of tilsotolimod ranging from 8 mg through 32 mg.

We completed enrollment with a total of 9 patients dosed with the combination therapy in the 8 mg, 16 mg and 32
mg dosing cohorts in the Phase 1 dose escalation portion of the pembrolizumab arm of the trial. As of January 16, 2020,
one patient who was treated at the 16 mg dose experienced a complete response by RECIST v1.1 criteria and has
completed the study.

Refractory Solid Tumors

ILLUMINATE-101 - Phase 1b Trial of Intratumoral Tilsotolimod (IMO-2125) Monotherapy in Patients with
Refractory Solid Tumors

In March 2017, we initiated a Phase 1b dose escalation trial of intratumoral tilsotolimod as a single agent in multiple
tumor types, which we refer to as ILLUMINATE-101. In this trial, intratumoral tilsotolimod was administered on days 1, 8
and 15 of cycle 1 and on day 1 of each subsequent 21-day cycle, up to 17 cycles, for a total of 19 doses.  We completed
enrollment of a total of 38 patients in four dose-escalation cohorts at doses of 8mg (cohort 1, n=11), 16mg (cohort 2, n=8),
23mg (cohort 3, n=10) and 32mg (cohort 4, n=9).  There were no dose-limiting toxicities observed and tilsotolimod
appeared to be generally well-tolerated at each of the dose levels tested.  We also completed enrollment of 16 patients in a
melanoma expansion cohort, which utilized a Simon’s optimal two-stage design, to assess whether tilsotolimod as a single
agent (8mg dose) has any statistically relevant clinical activity, as demonstrated for objective response according to
RECIST v1.1 criteria, in patients with metastatic melanoma who have progressed on or after treatment with a PD-(L)1
inhibitor. The study was completed in October 2019.

At the European Society for Medical Oncology Congress in September 2019, we provided an update on

ILLUMINATE-101, noting that as of July 1, 2019, a total of 54 patients had been dosed, including 38 patients in the dose-
evaluation portion of the trial and 16 patients in the melanoma dose-expansion cohort. Of the 45 evaluable patients, 33%
(n=15) had a best response stable disease. Duration of stable disease ranged from 1.5 to 12 months from the start of
treatment, with stable disease ongoing for two patients. There were no correlations between dose and efficacy observed.

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An additional purpose of this study was to obtain tumor biopsies to assess the effect of tilsotolimod on the tumor

microenvironment in multiple types of solid tumors and inform the expansion of the development program beyond
melanoma. Translational research in ILLUMINATE-101 demonstrated that tilsotolimod increased dendritic cell activation
and upregulated MHC class II and IFN-α signaling, which suggests improved antigen presentation, and is similar to that
observed and previously reported in the tumor biopsies from the ILLUMINATE-204 melanoma subjects. This observation
provided additional rationale to expand the tilsotolimod clinical development program to additional solid tumors.

Other Solid Tumors

Advancements in cancer immunotherapy have included the approval and late-stage development of multiple
checkpoint inhibitors, as single agents or in combination, for other solid tumors including, among others, dMMR/MSI-H
colorectal cancer (“CRC”) and squamous cell carcinoma of the head and neck (“SCCHN”).

Nivolumab administered as monotherapy or in combination with ipilimumab has demonstrated benefit and is
approved for the treatment of dMMR/MSI-H mCRC. However, in a previously treated microsatellite stable (“MSS”) CRC
patient population, nivolumab + ipilimumab combination therapy did not produce objective responses. MSS-CRC has been
shown to be highly immunosuppressive. Moreover, the tumor microenvironment in MSS-CRC has been shown to keep
dendritic cells in an immature state. Given tilsotolimod’s mechanism of action of activating dendritic cells, it may serve a
complementary function to nivolumab and ipilimumab within the immunosuppressive tumor microenvironment (“TME”)
of MSS-CRC patients.

We believe, based on internally conducted commercial research and information published by the American Cancer
Society and other references, that annually in the United States, approximately 140,000 people are diagnosed with CRC, of
which 85% are MSS, and that approximately 50,000 deaths are attributed to CRC. Additionally, we believe that annually in
the United States, approximately 64,000 people are diagnosed with SCCHN and there are approximately 14,000 deaths
attributed to SCCHN. We also believe that, in 2018, approximately 200,000 patients in the United States with various
tumor types have been treated with an anti-PD-1/anti-PD-L1 therapy. Approximately 87% of these patients may progress
after treatment and therefore may benefit from alternative therapies.

Squamous cell carcinoma is the most frequent malignant tumor of the head and neck region and develops from the

mucosal linings of the upper aerodigestive tract. Although the majority of patients present with loco-regional disease, more
than 50% will succumb to recurrent or metastatic disease despite aggressive therapy with surgery, radiation, and/or
chemotherapy. Relapsed or metastatic SCCHN (“RM-SCCHN”) is currently an incurable disease with a poor prognosis and
the mortality rate of patients presenting with advanced disease remains high. Recently, the results from prospectively
conducted trials employing the immune-modulating antibodies nivolumab and pembrolizumab following chemotherapy
heralded a new era of treatment for RM-SCCHN. Patients responding to these agents have seen durable responses and in
controlled studies an overall survival benefit has been demonstrated for the anti-PD-1 antibodies versus standard of care
chemotherapy. The challenge remains to increase the percentage of patients responding to these treatments, which currently
ranges from 13% to 23% depending on the line of therapy.

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ILLUMINATE-206 - Phase 2 Trial of Tilsotolimod (IMO-2125) in Combination with Nivolumab and Ipilimumab
for the treatment of Solid Tumors

In December 2018, we submitted an IND application to the FDA to evaluate tilsotolimod administered

intratumorally, in combination with nivolumab and ipilimumab in a Phase 2, multicohort study of multiple solid tumors.
The basis for this study is supported by data generated from our ILLUMINATE-101 and ILLUMINATE-204 trials, which
suggest the mechanism of action for tilsotolimod may be tumor-type agnostic and potentially beneficial in combination
with checkpoint modulation in a variety of tumor types. In January 2019, we received notification from the FDA that the
study may proceed and initiated the Phase 2, open-label, global, multicohort study for the treatment of specific solid tumors
in September 2019.  We refer to this study as ILLUMINATE-206.  

Each cohort in this study is designed to be conducted in two parts. The purpose of the first part (Part 1) is for signal
finding and utilizes a Simon’s minimax two-stage design in a single-arm. The primary objective of Part 1 is to evaluate the
efficacy (measured by ORR based on RECIST v1.1) of intratumoral tilsotolimod in combination with nivolumab and
ipilimumab. Secondary objectives of Part 1 include safety, tolerability, immunogenicity and translational data evaluations.
Based on the data from Part 1 of each cohort, expansion of a cohort may be conducted as Part 2. Part 2 objectives will be
determined after the decision is made to initiate Part 2 of a given cohort. The start and end of the study will be independent
for each cohort. 

The ILLUMINATE-206 cohorts are as follows:

· MSS-CRC Cohort (currently underway): Relapsed/refractory MSS-CRC in immunotherapy-naïve patients

treated with tilsotolimod in combination with nivolumab and ipilimumab; and

·

RM-SCCHN Cohort (currently being evaluated): RM-SCCHN in PD-1-refractory patients treated with
tilsotolimod in combination with nivolumab and ipilimumab.

We initiated ILLUMINATE-206 beginning with the MSS-CRC Cohort. An initial group of ten patients were enrolled

to evaluate the safety of administering the combination of tilsotolimod, nivolumab and ipilimumab. Within Part 1 of the
MSS-CRC Cohort, approximately 65 patients may be enrolled pending data from the signal-finding stage. See information
on our clinical trial and supply agreement with AbbVie under the heading “Collaborative Alliances” which discusses the
development of tilsotolimod in combination with ABBV-368 and other combinations for the treatment of SCCHN.

As discussed below under the heading “Collaborative Alliances,” in March 2019, we entered into a clinical trial
collaboration and supply agreement with BMS, under which BMS has agreed to manufacture and supply YERVOY®
(ipilimumab) and OPDIVO® (nivolumab), at its cost and for no charge to us, for use in ILLUMINATE-206.

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Discontinued Programs

In July 2018, following an analysis of our gene-silencing technology platform and our research portfolio, we decided

to suspend our rare disease and discovery programs as part of our overall strategy to more narrowly focus our capital
resources on the development and commercialization of tilsotolimod.

IMO-8400 for Rare Diseases

We had been developing IMO-8400, an antagonist of TLR7, TLR8 and TLR9, for the treatment of rare diseases, and

dermatomyositis was our lead clinical target. In December 2015, we initiated a Phase 2, randomized, double-blind,
placebo-controlled clinical trial designed to assess the safety, tolerability and treatment effect of IMO-8400 in adult patients
with dermatomyositis. In June 2018, we reported that the trial did not meet its primary endpoint of statistically significant
change from baseline in the Cutaneous Dermatomyositis Disease Area and Severity Index (CDASI) activity score versus
placebo. As a result, in July 2018, we made a decision to discontinue this clinical program upon completion of final close-
out activities.

In April 2019, we out-licensed IMO-8400 to a privately-held biopharmaceutical company. See Note 10 of the notes

to our financial statements in this Annual Report on Form 10-K for additional information.

Agreement with Abbott Molecular

We are party to a development and commercialization agreement with Abbott Molecular, Inc. (“Abbott”), which we

entered into in May 2014, in connection with our prior IMO-8400 clinical development program for the treatment of certain
genetically defined forms of B-cell lymphoma, including our Phase 1/2 clinical trial in patients with diffuse large B-cell
lymphoma (“DLBCL”) harboring the MYD88 L265P oncogenic mutation. The agreement provided for the development
and subsequent commercialization, by Abbott, of an in vitro companion diagnostic test utilizing polymerase chain reaction
technology to identify with high sensitivity and specificity the presence in tumor biopsy samples of the oncogenic mutation
referred to scientifically as MYD88 L265P. In September 2016, we suspended all clinical development of IMO-8400 for B-
cell lymphomas.  While we have maintained our relationship with Abbott under the agreement, we are permitted to
terminate the agreement upon 90 days written notice to Abbott and, under circumstances specified in the agreement,
payment of a termination fee and wind-down costs. The parties also may terminate the agreement based on uncured
material breaches by or the bankruptcy or insolvency of the other party, and each party has the right to terminate the
agreement in the event of specified permanent injunctions based on infringement of third-party intellectual property rights.

IMO-9200 for Autoimmune Disease

We had developed a second novel synthetic oligonucleotide antagonist of TLR7, TLR8, and TLR9, IMO-9200, as a
drug candidate for potential use in selected autoimmune disease indications. In 2015, we completed a Phase 1 clinical trial
of IMO-9200 in healthy subjects as well as additional preclinical studies of IMO-9200 for autoimmune diseases. In 2015,
we determined not to proceed with the development of IMO-9200 because the large autoimmune disease indications for
which IMO-9200 had been developed did not fit within the strategic focus of our company. In November 2016, we entered
into an exclusive license and collaboration agreement with Vivelix Pharmaceuticals, Ltd. (“Vivelix”), granting Vivelix
worldwide rights to develop and market IMO-9200 for non-malignant gastrointestinal disorders, which agreement we refer
to as the Vivelix Agreement. On November 4, 2018, Vivelix notified us that they decided to terminate ongoing
development activities related to IMO-9200. Subsequently, on March 4, 2019, we mutually agreed to terminate the Vivelix
Agreement.

Other Rare Disease and Discovery Programs

Collaboration with GlaxoSmithKline Intellectual Property Development Limited

In November 2015, we entered into a collaboration and license agreement with GlaxoSmithKline Intellectual
Property Development Limited (“GSK”) to license, research, develop and commercialize pharmaceutical compounds from
our nucleic acid chemistry technology for the treatment of selected targets in renal disease, which agreement we refer to as
the GSK Agreement. In connection with the GSK Agreement, GSK provided an initial target for us to identify a potential
population of development candidates to address such target under a mutually agreed upon research plan. Prior to
suspending our rare disease and discovery programs, and the wind-

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down of such discovery operations, we created multiple development candidates to address the initial target designated by
GSK. Until November 2019, the expiration of the collaboration term, GSK had the right to designate one development
candidate in its sole discretion, from the population of identified candidates, to move forward into clinical development.
However, GSK did not designate any candidate for development during the collaboration term.  If such designation had
occurred, GSK would have been solely responsible for the development and commercialization activities for that
designated development candidate.

The GSK Agreement also provided GSK with the option to select up to two additional targets at any time during the
first two years of the agreement, for further research under mutually agreed upon research plans. Upon selecting additional
targets, GSK then had the option to designate one development candidate for each additional target, at which time GSK
would have sole responsibility to develop and commercialize each such designated development candidate. GSK did not
select any additional targets for research through the expiry of the option period.

Under the terms of the GSK Agreement, we received a $2.5 million upfront, non-refundable, non-creditable cash

payment upon the execution of the GSK Agreement.  Additionally, we were initially eligible to receive a total of up to
approximately $100 million in license, research, clinical development and commercialization milestone payments under the
GSK agreement, of which $9 million of these milestone payments would have been payable by GSK upon the
identification of the additional targets, the completion of current and future research plans and the designation of
development candidates and $89 million would have been payable by GSK upon the achievement of clinical milestones
and commercial milestones. As a result of GSK not designating a development candidate during the collaboration term, we
are no longer eligible to receive any additional license, research, clinical development and commercialization milestone
payments, or any royalty payments, pursuant to the GSK Agreement.

Collaborative Alliances

Our current alliances include collaborations with AbbVie Inc. (“AbbVie”) and BMS. In addition to our current
alliances, we may seek to enter into additional collaborative alliances to support development and commercialization of our
TLR agonists and antagonists.

Collaboration with AbbVie

Effective August 27, 2019, we entered into a clinical trial collaboration and supply agreement with AbbVie, a global,

research-based biopharmaceutical company, to conduct a clinical study to evaluate the efficacy and safety of combinations
of an OX40 agonist (ABBV-368), tilsotolimod, nab-paclitaxel and/or an anti-programmed cell death 1 (PD-1) antagonist
(ABBV-181), which we refer to as the AbbVie Agreement. Under the AbbVie Agreement, we will provide a clinical trial
supply of tilsotolimod to AbbVie and AbbVie will sponsor, fund and conduct the study entitled “A Phase 1b, Multicenter,
Open-Label Study to Determine the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of ABBV-368 plus
Tilsotolimod and Other Therapy Combinations in Subjects with Recurrent/Metastatic Head and Neck Squamous Cell
Carcinoma” (the, “AbbVie Study”). We have agreed to manufacture and supply tilsotolimod at its cost and for no charge to
AbbVie, for use in the AbbVie Study.

Collaboration with Bristol-Meyers Squibb

Effective May 18, 2018, we entered into a clinical trial collaboration and supply agreement with BMS (the “May

2018 BMS Agreement”) to clinically evaluate the combination of tilsotolimod with BMS’s therapy YERVOY®
(ipilimumab). Under the May 2018 BMS Agreement, we will sponsor, fund and conduct our ongoing global, open-label,
multicenter Phase 3 clinical trial of tilsotolimod in combination with YERVOY® entitled “A Randomized Phase 3
Comparison of IMO-2125 with Ipilimumab versus Ipilimumab Alone in Patients with Anti-PD-1 Refractory Melanoma” in
accordance with an agreed-upon protocol, which we refer to as ILLUMINATE-301.  Under the May 2018 BMS
Agreement, BMS granted us a non-exclusive, non-transferrable, royalty-free license (with a right to sublicense) under its
intellectual property to use YERVOY® in ILLUMINATE-301 and has agreed to manufacture and supply YERVOY®, at its
cost and for no charge to us, for use in ILLUMINATE-301.

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Effective March 11, 2019, we entered into a second clinical trial collaboration and supply agreement with BMS (the

“March 2019 BMS Agreement”) to clinically evaluate the combination of tilsotolimod with BMS’s therapy YERVOY®
(ipilimumab) and OPDIVO® (nivolumab). Under the March 2019 BMS Agreement, we will sponsor, fund and conduct a
Phase 2, open-label, global, multicenter, multicohort study of intratumoral tilsotolimod in combination with YERVOY®
and OPDIVO® entitled “Study of Tilsotolimod in Combination with Nivolumab and Ipilimumab For the Treatment of
Solid Tumors” in accordance with an agreed-upon protocol, which we refer to as ILLUMINATE-206.  Under the March
2019 BMS Agreement, BMS granted us a non-exclusive, non-transferrable, royalty-free license (with a right to sublicense)
under its intellectual property to use YERVOY® and OPDIVO® in ILLUMINATE-206 and has agreed to manufacture and
supply YERVOY® and OPDIVO®, at its cost and for no charge to us, for use in ILLUMINATE-206.

Academic and Research Collaborations

We have entered into research collaborations with scientists at leading academic research institutions. These research

collaborations allow us to augment our internal research capabilities and obtain access to specialized knowledge and
expertise. In general, our research collaborations may require us to supply compounds and pay various amounts to support
the research. Under these research agreements, if a collaborator, solely or jointly with us, creates any invention, we may
own exclusively such invention, have an automatic paid-up, royalty-free non-exclusive license or have an option to
negotiate an exclusive, worldwide, royalty-bearing license to such invention. Inventions developed solely by our scientists
in connection with research collaborations are owned exclusively by us. These collaborative agreements are non-exclusive
and may be terminated with limited notice.

Research and Development Expenses

We are committed to redefining the treatment of certain cancers and rare diseases and have historically dedicated a
significant portion of our resources to our efforts on the discovery and development of our drug candidates.  For the years
ended December 31, 2019, 2018 and 2017, we spent approximately $34.9 million, $41.8 million, and $50.7 million,
respectively, on research and development activities. We plan to continue to invest in research and development, primarily
with respect to our clinical trials of tilsotolimod. Accordingly, we anticipate a significant portion of our operating expenses
will continue to be related to clinical development in 2020 and beyond.

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Patents, Proprietary Rights and Trade Secrets

Our success depends in part on our ability to obtain and maintain proprietary protection for our drug candidates,

technology and know-how, to operate without infringing the proprietary rights of others and to prevent others from
infringing our proprietary rights. We use a variety of methods to seek to protect our proprietary position, including filing
U.S. and foreign patent applications related to our proprietary technology, inventions and improvements that are important
to the development of our business. We also rely on trade secrets, know-how, continuing technological innovation, and in-
licensing opportunities to develop and maintain our proprietary position.

We have devoted and continue to devote a substantial amount of our resources into establishing intellectual property

protection for:

·

·

·

Novel chemical entities that function as agonists of TLR3, TLR7, TLR8 or TLR9;

Novel chemical entities that function as antagonists of TLR7, TLR8 or TLR9; and

Composition and use of our nucleic acid chemistry compounds to treat and prevent a variety of diseases.

On November 5, 2019, the U.S. Patent and Trademark Office issued to us U.S. Patent No. 10,463,686 entitled

“Immune Modulation With TLR9 Agonists For Cancer Treatment,” which includes tilsotolimod. The patent includes 24
claims directed to methods of treating melanoma with intratumoral administration of tilsotolimod in combination with
certain immune checkpoint inhibitor therapies, including inhibitors of the CTLA-4 and PD-1/PD-L1 pathways. The patent
is expected to expire in September 2037.

As of February 15, 2020, we owned approximately 53 U.S. patents and patent applications and about 184 patents

and patent applications throughout the rest of the world for our TLR-targeted immune modulation technologies. These
patents and patent applications include claims covering the chemical compositions of matter and methods of use of our
IMO compounds, such as IMO-8400, IMO-9200 and tilsotolimod (IMO-2125), as well as other compounds. These patents
and patent applications (if granted) expire at various dates ranging from 2020 to 2037. With respect to IMO-8400, we have
six issued U.S. patents that cover the chemical composition of matter of IMO-8400 and certain methods of its use, the latest
of which expires in 2031. With respect to IMO-9200, we have nine issued U.S. patents that cover the chemical composition
for IMO-9200 and methods of its use, the latest of which expires in 2034. With respect to tilsotolimod, we have an issued
U.S. patent that covers the chemical composition of matter of tilsotolimod that will expire in 2024 and additional patents
that cover methods of its use, the latest of which will expire in 2037. We have pending applications in the United States and
outside of the United States that cover methods of treatment or use of tilsotolimod, which, if granted, will expire between
2035 and 2039.

Because patent applications in the United States and many foreign jurisdictions are typically not published until 18
months after filing, or in some cases not at all, and because publications of discoveries in the scientific literature often lag
behind actual discoveries, neither we nor our licensors can be certain that we or they were the first to make the inventions
claimed in issued patents or pending patent applications, or that we or they were the first to file for protection of the
inventions set forth in these patent applications.

Litigation may be necessary to defend against or assert claims of infringement, to enforce patents issued to us, to

protect trade secrets or know-how owned by us, or to determine the scope and validity of the proprietary rights of others or
to determine the appropriate term for an issued patent. In addition, the United States Patent and Trademark Office
(“USPTO”) may declare interference proceedings to determine the priority of inventions with respect to our patent
applications or reexamination or reissue proceedings to determine if the scope of a patent should be narrowed. Litigation or
any of these other proceedings could result in substantial costs to and diversion of effort by us, even if the eventual
outcome is favorable to us, and could have a material adverse effect on our business, financial condition and results of
operations. These efforts by us may not be successful.

The term of individual patents depends upon the legal term for patents in the countries in which they are obtained. In

most countries, including the United States, the patent term is 20 years from the earliest filing date of a non-provisional
patent application. In the United States, a patent’s term may be lengthened by patent term adjustment, which compensates a
patentee for administrative delays by the USPTO in examining and granting a

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patent, or may be shortened if a patent is terminally disclaimed over an earlier filed patent. The term of a patent that covers
a drug, biological product or medical device approved pursuant to a pre-market approval may also be eligible for patent
term extension when FDA approval is granted, provided statutory and regulatory requirements are met. The length of the
patent term extension is related to the length of time the drug is under regulatory review while the patent is in force. The
Drug Price Competition and Patent Term Restoration Act of 1984, or the Hatch-Waxman Act, permits a patent term
extension of up to five years beyond the expiration date set for the patent. Patent extension cannot extend the remaining
term of a patent beyond a total of 14 years from the date of product approval, only one patent applicable to each regulatory
review period may be granted an extension and only those claims reading on the approved drug are extended. Similar
provisions are available in Europe and other foreign jurisdictions to extend the term of a patent that covers an approved
drug.

We may rely, in some circumstances, on trade secrets and confidentiality agreements to protect our technology.

Although trade secrets are difficult to protect, wherever possible, we use confidential disclosure agreements to protect the
proprietary nature of our technology. We regularly implement confidentiality agreements with our employees, consultants,
scientific advisors, and other contractors and collaborators. However, there can be no assurance that these agreements will
not be breached, that we will have adequate remedies for any breach, or that our trade secrets and/or proprietary
information will not otherwise become known or be independently discovered by competitors. To the extent that our
employees, consultants or contractors use intellectual property owned by others in their work for us, disputes may also arise
as to the rights in related or resulting know-how and inventions.

Manufacturing

We do not currently own or operate manufacturing facilities for the production of clinical or commercial quantities
of any of our drug candidates. We currently rely and expect to continue to rely on other companies for the manufacture of
our drug candidates for preclinical and clinical development. We source our bulk drug manufacturing requirements from a
limited number of contract manufacturers through the issuance of work orders on an as-needed basis. We currently do not
have any long-term supply contracts. We depend and will continue to depend on our contract manufacturers to manufacture
our drug candidates in accordance with current Good Manufacturing Practices (“cGMP”) regulations for use in clinical
trials. We will ultimately depend on contract manufacturers for the manufacture of our products for commercial sale, if and
when our drug candidates are approved. Contract manufacturers are subject to extensive governmental regulation.

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Competition

The biotechnology and pharmaceutical industries are characterized by rapidly advancing technologies, intense

competition and a strong emphasis on proprietary products. We are currently developing tilsotolimod (IMO-2125), our
TLR agonist drug candidate, for the treatment by intratumoral injection of multiple oncology indications in combination
with checkpoint inhibitors. There are many other companies, both public and private, that are actively engaged in
discovery, development, and commercializing products and technologies that may compete with our drug candidate,
tilsotolimod, including TLR-targeted compounds as well as non-TLR-targeted therapeutics.  

Immuno-oncology, which utilizes a patient’s own immune system to combat cancer, is currently an active area of

research for biotechnology and pharmaceutical companies. Interest in immuno-oncology is driven by efficacy data in
cancers with historically bleak outcomes and the potential to achieve a cure or functional cure for some patients. As such,
we expect that our efforts in this field will be competitive with a wide variety of different approaches. Any one of these
competitive approaches may result in the development of novel technologies that are more effective, safer or less costly
than any that we are developing.

We are aware of other companies developing TLR agonists as well as other mechanisms of action that are focused

on stimulating the immune response. These companies include, but are not limited to, Aduro Biotech, Inc., BioLineRx Ltd.,
Checkmate Pharmaceuticals, Inc., Dynavax Technologies Corporation, Exicure, Inc., Gilead Sciences Inc.,
GlaxoSmithKline plc, Hoffmann-La Roche Ltd., Innate Immunotherapeutics Ltd., Mologen AG VentiRx Pharmaceuticals
Inc., Nektar Therapeutics, and Telormedix S.A.. Additionally, we are aware of other companies developing non-TLR
therapies in our patient populations including, but not limited to OncoSec Immunotherapies, Iovance Biotherapeutics, Lytix
Biopharma and Takara Bio.

We recognize that other companies, including large pharmaceutical companies, may be developing or have plans to

develop products and technologies that may compete with ours. Many of our competitors have substantially greater
financial, technical, and human resources than we have. In addition, many of our competitors have significantly greater
experience than we have in undertaking preclinical studies and human clinical trials of new pharmaceutical products,
obtaining FDA and other regulatory approvals of products for use in health care and manufacturing, and marketing and
selling approved products. Our competitors may discover, develop or commercialize products or other novel technologies
that are more effective, safer or less costly than any that we are developing. Our competitors may also obtain FDA or other
regulatory approval for their products more rapidly than we may obtain approval for ours.

We anticipate that the competition with our drug candidate, tilsotolimod, and technologies will be based on a number

of factors including product efficacy, safety, availability, and price. The timing of market introduction of tilsotolimod and
competitive products will also affect competition among products. We expect the relative speed with which we can develop
tilsotolimod, complete the clinical trials and approval processes, and supply commercial quantities of the products to the
market to be important competitive factors. Our competitive position will also depend upon our ability to attract and retain
qualified personnel, to obtain patent protection or otherwise develop proprietary products or processes, protect our
intellectual property, and to secure sufficient capital resources for the period between technological conception and
commercial sales.

Risks related to our competitors and our competitive position are discussed in further detail in the section entitled

“Risk Factors” of this Annual Report on Form 10-K.

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Government Regulation

Government authorities in the United States, at the federal, state and local level, and in other countries and
jurisdictions, including the European Union, extensively regulate, among other things, the research, development, testing,
manufacture, quality control, approval, packaging, storage, recordkeeping, labeling, advertising, promotion, distribution,
marketing, pricing, post-approval monitoring and reporting, and import and export of pharmaceutical products. The
processes for obtaining regulatory approvals in the United States and in foreign countries and jurisdictions, along with
subsequent compliance with applicable statutes and regulations and other regulatory authorities, require the expenditure of
substantial time and financial resources.

Review and Approval of Drugs in the United States

In the United States, the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act (“FDCA”) and
associated implementing regulations. The failure to comply with the FDCA and other applicable U.S. requirements at any
time during the product development process, approval process or after approval may subject an applicant and/or sponsor
to a variety of administrative or judicial sanctions, including refusal by the FDA to approve pending applications,
withdrawal of an approval, imposition of a clinical hold, issuance of warning letters and other types of letters, product
recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government
contracts, restitution, disgorgement of profits, or civil or criminal investigations and penalties brought by the FDA and the
Department of Justice, or the DOJ, or other governmental entities, including state agencies.

An applicant seeking approval to market and distribute a new drug product in the United States must typically

undertake the following:

·

·

·

completion of preclinical laboratory tests, animal studies and formulation studies in compliance with the FDA’s
good laboratory practice (“GLP”) regulations;

submission to the FDA of an IND, which must take effect before human clinical trials may begin in the United
States;

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

· performance of adequate and well-controlled human clinical trials in accordance with good clinical practices

(“GCP”) to establish the safety and efficacy of the proposed drug product for each indication;

· preparation and submission to the FDA of a new drug application (“NDA”);

·

·

·

review of the product candidate by an FDA advisory committee, where appropriate or if applicable;

satisfactory completion of one or more FDA inspections of the manufacturing facility or facilities at which the
product, or components thereof, are produced to assess compliance with cGMP requirements and to assure that the
facilities, methods and controls are adequate to preserve the product’s identity, strength, quality and purity;

satisfactory completion of FDA audits of clinical trial sites to assure compliance with GCPs and the integrity of
the clinical data;

· payment of user fees and securing FDA approval of the NDA; and

·

compliance with any post-approval requirements, including Risk Evaluation and Mitigation Strategies (“REMS”)
where applicable, and post-approval studies required by the FDA.

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Preclinical Studies

Before an applicant begins testing a product candidate with potential therapeutic value in humans, the product
candidate enters the preclinical testing stage. Preclinical studies include laboratory evaluation of the purity and stability of
the manufactured drug substance or active pharmaceutical ingredient and the formulated drug or drug product, as well as in
vitro and animal studies to assess the safety and activity of the drug for initial testing in humans and to establish a rationale
for therapeutic use. The conduct of preclinical studies is subject to federal regulations and requirements, including GLP
regulations. The results of the preclinical tests, together with manufacturing information, analytical data, any available
clinical data or literature and plans for clinical studies, among other things, are submitted to the FDA as part of an IND.
Additional preclinical testing, such as animal tests of reproductive adverse events and carcinogenicity, may continue after
the IND is submitted.

Human Clinical Studies in Support of an NDA

Clinical trials involve the administration of the investigational product to human subjects under the supervision of
qualified investigators in accordance with GCP requirements, which include, among other things, the requirement that all
research subjects provide their informed consent in writing before their participation in any clinical trial. Clinical trials are
conducted under written study protocols detailing, among other things, the objectives of the study, inclusion and exclusion
criteria, the parameters to be used in monitoring safety and the effectiveness criteria to be evaluated. A protocol for each
clinical trial and any subsequent protocol amendments must be submitted to the FDA as part of the IND. An IND is an
exemption from the FDCA that allows an unapproved product candidate to be shipped in interstate commerce for use in an
investigational clinical trial and a request for FDA authorization to administer such investigational product to humans. An
IND automatically becomes effective 30 days after receipt by the FDA, unless before that time the FDA raises concerns or
questions related to a proposed clinical trial and places the trial on clinical hold or partial clinical hold. In such a case, the
IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin.

Typically, the FDA will require one IND for early development studies where the sponsor is uncertain of the
indication or dosage form of the proposed product, where the drug is being developed for closely related indications within
a single review division at FDA, or where there are multiple closely-related routes of administration using the same dosage
formulation. On the other hand, multiple INDs may be required where there are two or more unrelated conditions being
developed or where multiple dosage forms are being extensively investigated or where multiple routes of administration are
being evaluated.

In addition to the foregoing IND requirements, an IRB representing each institution participating in the clinical trial

must review and approve the plan for any clinical trial before it commences at that institution, and the IRB must conduct
continuing review and reapprove the study at least annually. The IRB must review and approve, among other things, the
study protocol and informed consent information to be provided to study subjects. An IRB must operate in compliance with
FDA regulations. Information about certain clinical trials must be submitted within specific timeframes to the National
Institutes of Health for public dissemination on their ClinicalTrials.gov website.

Additionally, some trials are overseen by an independent group of qualified experts organized by the trial sponsor,

known as a data monitoring committee (“DMC”). This group provides recommendations as to whether a trial should move
forward at designated check points based on access that only the group maintains to available data from the study.
Suspension or termination of development during any phase of clinical trials can occur if it is determined that the
participants or patients are being exposed to an unacceptable health risk. Other reasons for suspension or termination may
be made by us based on evolving business objectives and/or competitive climate.

Human clinical trials are typically conducted in three sequential phases, which may overlap or be combined:

Phase 1:    The drug is initially introduced into healthy human subjects or patients with the target disease (e.g.
cancer) or condition and tested for safety, dosage tolerance, absorption, metabolism, distribution, excretion and, if possible,
to gain an early indication of its effectiveness and to determine optimal dosage.

Phase 2:    The drug is administered to a limited patient population 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:    The drug is administered to an expanded patient population, generally at geographically dispersed
clinical trial sites, in well-controlled clinical trials to generate enough data to statistically evaluate the efficacy and safety of
the product for approval, to establish the overall risk-benefit profile of the product, and to provide adequate information for
the labeling of the product.

Progress reports detailing the results of the clinical trials must be submitted at least annually to the FDA and more

frequently if serious adverse events occur. In addition, IND safety reports must be submitted to the FDA for any of the
following: serious and unexpected suspected adverse reactions; findings from other studies or animal or in vitro testing that
suggest a significant risk in humans exposed to the drug; and any clinically important increase in the case of a serious
suspected adverse reaction over that listed in the protocol or investigator brochure. Phase 1, Phase 2 and Phase 3 clinical
trials may not be completed successfully within any specified period, or at all. Furthermore, the FDA, the sponsor or the
data monitoring committee for a clinical trial may suspend or terminate the clinical trial at any time on various grounds,
including a finding that the research subjects are being exposed to an unacceptable health risk. Similarly, an IRB can
suspend or terminate approval of a clinical trial at its institution, or an institution it represents, if the clinical trial is not
being conducted in accordance with the IRB’s requirements or if the drug has been associated with unexpected serious
harm to patients. The FDA will typically inspect one or more clinical sites to assure compliance with GCP and the integrity
of the clinical data submitted.

Section 505(b)(2) NDAs

NDAs for most new drug products are based on two full clinical studies which must contain substantial evidence of

the safety and efficacy of the proposed new product. These applications are submitted under Section 505(b)(1) of the
FDCA. The FDA is, however, authorized to approve an alternative type of NDA under Section 505(b)(2) of the FDCA.
This type of application allows the applicant to rely, in part, on the FDA’s previous findings of safety and efficacy for a
similar product, or published literature. Specifically, Section 505(b)(2) applies to NDAs for a drug for which the
investigations made to show whether or not the drug is safe for use and effective in use and relied upon by the applicant for
approval of the application “were not conducted by or for the applicant and for which the applicant has not obtained a right
of reference or use from the person by or for whom the investigations were conducted.”

Thus, Section 505(b)(2) authorizes the FDA to approve an NDA based on safety and effectiveness data that were not
developed by the applicant. NDAs filed under Section 505(b)(2) may provide an alternate and potentially more expeditious
pathway to FDA approval for new or improved formulations or new uses of previously approved products. If the
Section 505(b)(2) applicant can establish that reliance on the FDA’s previous approval is scientifically appropriate, the
applicant may eliminate the need to conduct certain preclinical or clinical studies of the new product. The FDA may also
require companies to perform additional studies or measurements to support the change from the approved product. The
FDA may then approve the new drug candidate for all or some of the label indications for which the referenced product has
been approved, as well as for any new indication sought by the Section 505(b)(2) applicant.

Submission of an NDA to the FDA

Assuming successful completion of required clinical testing and other requirements, the results of the preclinical and

clinical studies, together with detailed information relating to the product’s chemistry, manufacture, controls and proposed
labeling, among other things, are submitted to the FDA as part of an NDA requesting approval to market the drug product
for one or more indications. Under federal law, the submission of most NDAs is subject to an application user fee, which
for federal fiscal year 2019 is $2,588,478 for an application requiring clinical data. The sponsor of an approved NDA is
also subject to an annual program fee, which for fiscal year 2019 is $309,915. Exceptions or waivers for these fees exist for
a small company (fewer than 500 employees, including employees and affiliates) satisfying certain requirements and
products with orphan drug designation for a particular indication are not subject to a fee provided there are no other
intended uses in the NDA.

The FDA conducts a preliminary review of an NDA within 60 calendar days of its receipt and strives to inform the

sponsor by the 74th day after the FDA’s receipt of the submission to determine whether the application is sufficiently
complete to permit substantive review. The FDA may request additional information rather than accept an NDA for filing.
In this event, the application must be resubmitted with the additional information. The resubmitted application is also
subject to review before the FDA accepts it for filing. Once the submission is accepted for filing, the FDA begins an in-
depth substantive review.

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The FDA has agreed to specified performance goals in the review process of NDAs. Under the agreement, 90% of
applications seeking approval of New Molecular Entities (“NMEs”), are meant to be reviewed within ten months from the
date on which the FDA accepts the NDA for filing, and 90% of applications for NMEs that have been designated for
“priority review” are meant to be reviewed within six months of the filing date. For applications seeking approval of drugs
that are not NMEs, the ten-month and six-month review periods run from the date that the FDA receives the
application.  The review process may be extended by the FDA for three additional months to consider new information or
clarification provided by the applicant to address an outstanding deficiency identified by the FDA following the original
submission.

Before approving an NDA, the FDA typically will inspect the facility or facilities where the product is or will be

manufactured. These pre-approval inspections cover all facilities associated with an NDA submission, including drug
component manufacturing (such as active pharmaceutical ingredients), finished drug product manufacturing, and control
testing laboratories. The FDA will not approve an application unless it determines that the manufacturing processes and
facilities are in compliance with cGMP requirements and adequate to assure consistent production of the product within
required specifications. Additionally, before approving an NDA, the FDA will typically inspect one or more clinical sites to
assure compliance with GCP.

In addition, as a condition of approval, the FDA may require an applicant to develop a REMS. REMS use risk

minimization strategies beyond the professional labeling to ensure that the benefits of the product outweigh the potential
risks. To determine whether a REMS is needed, the FDA will consider the size of the population likely to use the product,
seriousness of the disease, expected benefit of the product, expected duration of treatment, seriousness of known or
potential adverse events, and whether the product is a new molecular entity. REMS can include medication guides,
physician communication plans for healthcare professionals, and elements to assure safe use, or ETASU. ETASU may
include, but are not limited to, special training or certification for prescribing or dispensing, dispensing only under certain
circumstances, special monitoring, and the use of patient registries. The FDA may require a REMS before approval or post-
approval if it becomes aware of a serious risk associated with use of the product. The requirement for a REMS can
materially affect the potential market and profitability of a product.

The FDA is required to refer an application for a novel drug to an advisory committee or explain why such referral
was not made. Typically, an advisory committee is a panel of independent experts, including clinicians and other scientific
experts, that reviews, evaluates and provides a recommendation as to whether the application should be approved and under
what conditions. The FDA is not bound by the recommendations of an advisory committee, but it considers such
recommendations carefully when making decisions.

Fast Track, Breakthrough Therapy and Priority Review Designations

The FDA is authorized to designate certain products for expedited review if they are intended to address an unmet

medical need in the treatment of a serious or life-threatening disease or condition. These programs are fast track
designation, breakthrough therapy designation and priority review designation.

Specifically, the FDA may designate a product for fast track review if it is intended, whether alone or in combination
with one or more other drugs, for the treatment of a serious or life-threatening disease or condition, and it demonstrates the
potential to address unmet medical needs for such a disease or condition. For fast track products, sponsors may have greater
interactions with the FDA and the FDA may initiate review of sections of a fast track product’s NDA before the application
is complete. This rolling review may be available if the FDA determines, after preliminary evaluation of clinical data
submitted by the sponsor, that a fast track product may be effective. The sponsor must also provide, and the FDA must
approve, a schedule for the submission of the remaining information and the sponsor must pay applicable user fees.
However, the FDA’s time period goal for reviewing a fast track application does not begin until the last section of the NDA
is submitted. In addition, the fast track designation may be withdrawn by the FDA if the FDA believes that the designation
is no longer supported by data emerging in the clinical trial process.

Second, in 2012, Congress enacted the Food and Drug Administration Safety and Innovation Act (“FDASIA”). This

law established a new regulatory scheme allowing for expedited review of products designated as “breakthrough
therapies.” A product may be designated as a breakthrough therapy if it is intended, either 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 product may demonstrate substantial improvement over existing

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therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical
development. The FDA may take certain actions with respect to breakthrough therapies, including holding meetings with
the sponsor throughout the development process; providing timely advice to the product sponsor regarding development
and approval; involving more senior staff in the review process; assigning a cross-disciplinary project lead for the review
team; and taking other steps to design the clinical trials in an efficient manner.

Third, the FDA may designate a product for priority review if it is a drug that treats a serious condition and, if

approved, would provide a significant improvement in safety or effectiveness. The FDA determines, on a case-by-case
basis, whether the proposed drug represents a significant improvement when compared with other available therapies.
Significant improvement may be illustrated by evidence of increased effectiveness in the treatment of a condition,
elimination or substantial reduction of a treatment-limiting drug reaction, documented enhancement of patient compliance
that may lead to improvement in serious outcomes, and evidence of safety and effectiveness in a new subpopulation. A
priority designation is intended to direct overall attention and resources to the evaluation of such applications, and to
shorten the FDA’s goal for taking action on a marketing application from ten months to six months.

Accelerated Approval Pathway

The FDA may grant accelerated approval to a drug for a serious or life-threatening condition that provides
meaningful therapeutic advantage to patients over existing treatments based upon a determination that the drug has an
effect on a surrogate endpoint that is reasonably likely to predict clinical benefit. The FDA may also grant accelerated
approval for such a condition when the product has an effect on an intermediate clinical endpoint that can be measured
earlier than an effect on irreversible morbidity or mortality (“IMM”), and 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. Drugs granted accelerated approval must meet the same
statutory standards for safety and effectiveness as those granted traditional approval.

For the purposes of accelerated approval, a surrogate endpoint is a marker, such as a laboratory measurement,
radiographic image, physical sign, or other measure that is thought to predict clinical benefit, but is not itself a measure of
clinical benefit. Surrogate endpoints can often be measured more easily or more rapidly than clinical endpoints. An
intermediate clinical endpoint is a measurement of a therapeutic effect that is considered reasonably likely to predict the
clinical benefit of a drug, such as an effect on IMM. The FDA has limited experience with accelerated approvals based on
intermediate clinical endpoints, but has indicated that such endpoints generally may support accelerated approval where the
therapeutic effect measured by the endpoint is not itself a clinical benefit and basis for traditional approval, if there is a
basis for concluding that the therapeutic effect is reasonably likely to predict the ultimate clinical benefit of a drug.

The accelerated approval pathway is most often used in settings in which the course of a disease is long and an
extended period of time is required to measure the intended clinical benefit of a drug, even if the effect on the surrogate or
intermediate clinical endpoint occurs rapidly. Thus, accelerated approval has been used extensively in the development and
approval of drugs for treatment of a variety of cancers in which the goal of therapy is generally to improve survival or
decrease morbidity and the duration of the typical disease course requires lengthy and sometimes large trials to demonstrate
a clinical or survival benefit.

The accelerated approval pathway is usually contingent on a sponsor’s agreement to conduct, in a diligent manner,

additional post-approval confirmatory studies to verify and describe the drug’s clinical benefit. As a result, a drug candidate
approved on this basis is subject to rigorous post-marketing compliance requirements, including the completion of Phase 4
or post-approval clinical trials to confirm the effect on the clinical endpoint. Failure to conduct required post-approval
studies, or confirm a clinical benefit during post-marketing studies, would allow the FDA to withdraw the drug from the
market on an expedited basis. All promotional materials for drug candidates approved under accelerated regulations are
subject to prior review by the FDA.

The FDA’s Decision on an NDA

On the basis of the FDA’s evaluation of the NDA and accompanying information, including the results of the

inspection of the manufacturing facilities, the FDA may issue an approval letter or a complete response letter. An

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approval letter authorizes commercial marketing of the product with specific prescribing information for specific
indications. A complete response letter generally outlines the deficiencies in the submission and may require substantial
additional testing or information in order for the FDA to reconsider the application. If and when those deficiencies have
been addressed to the FDA’s satisfaction in a resubmission of the NDA, the FDA will issue an approval letter. The FDA has
committed to reviewing such resubmissions in two or six months depending on the type of information included. Even with
submission of this additional information, the FDA ultimately may decide that the application does not satisfy the
regulatory criteria for approval.

If the FDA approves a product, it may limit the approved indications for use for the product, require that

contraindications, warnings or precautions be included in the product labeling, require that post-approval studies, including
Phase 4 clinical trials, be conducted to further assess the drug’s safety after approval, require testing and surveillance
programs to monitor the product after commercialization, or impose other conditions, including distribution restrictions or
other risk management mechanisms, including REMS, which can materially affect the potential market and profitability of
the product. The FDA may prevent or limit further marketing of a product based on the results of post-market studies or
surveillance programs. After approval, many types of changes to the approved product, such as adding new indications,
manufacturing changes and additional labeling claims, are subject to further testing requirements and FDA review and
approval.

Post-Approval Requirements

Drugs manufactured or distributed pursuant to FDA approvals are subject to pervasive and continuing regulation by
the FDA, including, among other things, requirements relating to recordkeeping, periodic reporting, product sampling and
distribution, advertising and promotion and reporting of adverse experiences with the product. After approval, most
changes to the approved product, such as adding new indications or other labeling claims, are subject to prior FDA review
and approval. There also are continuing, annual user fee requirements for any marketed products and the establishments at
which such products are manufactured, as well as new application fees for supplemental applications with clinical data.

In addition, drug manufacturers and other entities involved in the manufacture and distribution of approved drugs are

required to register their establishments with the FDA and state agencies, and are subject to periodic unannounced
inspections by the FDA and these state agencies for compliance with cGMP requirements. Changes to the manufacturing
process are strictly regulated and often require prior FDA approval before being implemented. FDA regulations also
require investigation and correction of any deviations from cGMP and impose reporting and documentation requirements
upon the sponsor and any third-party manufacturers that the sponsor may decide to use. Accordingly, manufacturers must
continue to expend time, money, and effort in the area of production and quality control to maintain cGMP compliance.

Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory requirements and

standards is not maintained or if problems occur after the product reaches the market. Later discovery of previously
unknown problems with a product, including adverse events of unanticipated severity or frequency, or with manufacturing
processes, or failure to comply with regulatory requirements, may result in revisions to the approved labeling to add new
safety information; imposition of post-market studies or clinical trials to assess new safety risks; or imposition of
distribution or other restrictions under a REMS program. Other potential consequences include, among other things:

·

·

·

restrictions on the marketing or manufacturing of the product, suspension of the approval, complete withdrawal of
the product from the market or product recalls;

fines, warning letters or holds on post-approval clinical trials;

refusal of the FDA to approve pending NDAs or supplements to approved NDAs, or suspension or revocation of
product license approvals;

· product seizure or detention, or refusal to permit the import or export of products; or

·

injunctions or the imposition of civil or criminal penalties.

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The FDA strictly regulates the marketing, labeling, advertising and promotion of prescription drug products placed
on the market. This regulation includes, among other things, standards and regulations for direct-to-consumer advertising,
communications regarding unapproved uses, industry-sponsored scientific and educational activities, and promotional
activities involving the Internet and social media. Promotional claims about a drug’s safety or effectiveness are prohibited
before the drug is approved. After approval, a drug product generally may not be promoted for uses that are not approved
by the FDA, as reflected in the product’s prescribing information. In the United States, health care professionals are
generally permitted to prescribe drugs for such uses not described in the drug’s labeling, known as off-label uses, because
the FDA does not regulate the practice of medicine. However, FDA regulations impose rigorous restrictions on
manufacturers’ communications, prohibiting the promotion of off-label uses. It may be permissible, under very specific,
narrow conditions, for a manufacturer to engage in nonpromotional, non-misleading communication regarding off-label
information, such as distributing scientific or medical journal information.

If a company is found to have promoted off-label uses, it may become subject to adverse public relations and
administrative and judicial enforcement by the FDA, the DOJ, or the Office of the Inspector General of the Department of
Health and Human Services, as well as state authorities. This could subject a company to a range of penalties that could
have a significant commercial impact, including civil and criminal fines and agreements that materially restrict the manner
in which a company promotes or distributes drug products. The federal government has levied large civil and criminal fines
against companies for alleged improper promotion, and has also requested that companies enter into consent decrees or
permanent injunctions under which specified promotional conduct is changed or curtailed.

In addition, the distribution of prescription pharmaceutical products is subject to the Prescription Drug Marketing

Act (“PDMA”), and its implementing regulations, as well as the Drug Supply Chain Security Act (“DSCA”), which
regulate the distribution and tracing of prescription drug samples at the federal level, and set minimum standards for the
regulation of drug distributors by the states. The PDMA, its implementing regulations and state laws limit the distribution
of prescription pharmaceutical product samples and the DSCA imposes requirements to ensure accountability in
distribution and to identify and remove counterfeit and other illegitimate products from the market.

Abbreviated New Drug Applications for Generic Drugs

In 1984, with passage of the Hatch-Waxman Amendments to the FDCA, Congress authorized the FDA to approve

generic drugs that are the same as drugs previously approved by the FDA under the NDA provisions of the statute. To
obtain approval of a generic drug, an applicant must submit an abbreviated new drug application, or ANDA, to the agency.
In support of such applications, a generic manufacturer may rely on the preclinical and clinical testing previously
conducted for a drug product previously approved under an NDA, known as the reference listed drug (“RLD”).

Specifically, in order for an ANDA to be approved, the FDA must find that the generic version is identical to the
RLD with respect to the active ingredients, the route of administration, the dosage form, and the strength of the drug. At the
same time, the FDA must also determine that the generic drug is “bioequivalent” to the innovator drug. Under the statute, a
generic drug is bioequivalent to a RLD if “the rate and extent of absorption of the drug do not show a significant difference
from the rate and extent of absorption of the listed drug.”

Upon approval of an ANDA, the FDA indicates whether the generic product is “therapeutically equivalent” to the

RLD in its publication “Approved Drug Products with Therapeutic Equivalence Evaluations,” also referred to as the
“Orange Book.” Physicians and pharmacists consider a therapeutic equivalent generic drug to be fully substitutable for the
RLD. In addition, by operation of certain state laws and numerous health insurance programs, the FDA’s designation of
therapeutic equivalence often results in substitution of the generic drug without the knowledge or consent of either the
prescribing physician or patient.

Under the Hatch-Waxman Amendments, the FDA may not approve an ANDA until any applicable period of non-

patent exclusivity for the RLD has expired. The FDCA provides a period of five years of non-patent data exclusivity for a
new drug containing a new chemical entity. For the purposes of this provision, a new chemical entity (“NCE”), is a drug
that contains no active moiety that has previously been approved by the FDA in any other NDA. An active moiety is the
molecule or ion responsible for the physiological or pharmacological action of the drug substance. In cases where such
exclusivity has been granted, an ANDA may not be filed with the FDA until the

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expiration of five years unless the submission is accompanied by a Paragraph IV certification, in which case the applicant
may submit its application four years following the original product approval. The FDCA also provides for a period of
three years of exclusivity if the NDA includes reports of one or more new clinical investigations, other than bioavailability
or bioequivalence studies, that were conducted by or for the applicant and are essential to the approval of the application.
This three-year exclusivity period often protects changes to a previously approved drug product, such as a new dosage
form, route of administration, combination or indication.

The FDA must establish a priority review track for certain generic drugs, requiring the FDA to review a drug
application within eight (8) months for a drug that has three (3) or fewer approved drugs listed in the Orange Book and is
no longer protected by any patent or regulatory exclusivities, or is on the FDA’s drug shortage list. The new legislation also
authorizes FDA to expedite review of ‘‘competitor generic therapies’’ or drugs with inadequate generic competition,
including holding meetings with or providing advice to the drug sponsor prior to submission of the application.

Hatch-Waxman Patent Certification and the 30-Month Stay

Upon approval of an NDA or a supplement thereto, NDA sponsors are required to list with the FDA each patent with

claims that cover the applicant’s product or an approved method of using the product. Each of the patents listed by the
NDA sponsor is published in the Orange Book. When an Abbreviated New Drug Application (“ANDA”), or 505(b)(2)
applicant files its application with the FDA, the applicant is required to certify to the FDA concerning any patents listed for
the reference product in the Orange Book, except for patents covering methods of use for which the ANDA applicant is not
seeking approval. 

Specifically, the applicant must certify with respect to each patent that:

·

·

·

·

the required patent information has not been filed;

the listed patent has expired;

the listed patent has not expired, but will expire on a particular date and approval is sought after patent
expiration; or

the listed patent is invalid, unenforceable or will not be infringed by the new product.

A certification that the new product will not infringe the already approved product’s listed patents or that such

patents are invalid or unenforceable is called a Paragraph IV certification. If the applicant does not challenge the listed
patents or indicates that it is not seeking approval of a patented method of use, the application will not be approved until all
the listed patents claiming the referenced product have expired (other than method of use patents involving indications for
which the ANDA applicant is not seeking approval).

If the ANDA or 505(b)(2) applicant has provided a Paragraph IV certification to the FDA, the applicant must also
send notice of the Paragraph IV certification to the NDA and patent holders once the ANDA or 505(b)(2) application has
been accepted for filing by the FDA. The NDA and patent holders may then initiate a patent infringement lawsuit in
response to the notice of the Paragraph IV certification. The filing of a patent infringement lawsuit within 45 days after the
receipt of a Paragraph IV certification automatically prevents the FDA from approving the ANDA or 505(b)(2) application
until the earlier of 30 months after the receipt of the Paragraph IV notice, expiration of the patent, or a decision in the
infringement case that is favorable to the ANDA applicant.

Pediatric Studies and Exclusivity

Under the Pediatric Research Equity Act of 2003, an NDA or supplement thereto must contain data that are adequate

to assess the safety and effectiveness of the drug product for the claimed indications in all relevant pediatric
subpopulations, and to support dosing and administration for each pediatric subpopulation for which the product is safe and
effective. With enactment of the FDASIA in 2012, sponsors must also submit pediatric study plans prior to the assessment
data. Those plans must contain an outline of the proposed pediatric study or studies the applicant plans to conduct,
including study objectives and design, any deferral or waiver requests, and other information required by regulation. The
applicant, the FDA, and the FDA’s internal review committee must then

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review the information submitted, consult with each other, and agree upon a final plan. The FDA or the applicant may
request an amendment to the plan at any time.

For drugs intended to treat a serious or life-threatening disease or condition, the FDA must, upon the request of an

applicant, meet to discuss preparation of the initial pediatric study plan or to discuss deferral or waiver of pediatric
assessments. In addition, FDA will meet early in the development process to discuss pediatric study plans with sponsors
and FDA must meet with sponsors by no later than the end-of-phase 1 meeting for serious or life-threatening diseases and
by no later than ninety (90) days after FDA’s receipt of the study plan.

The FDA may, on its own initiative or at the request of the applicant, grant deferrals for submission of some or all

pediatric data until after approval of the product for use in adults, or full or partial waivers from the pediatric data
requirements. Additional requirements and procedures relating to deferral requests and requests for extension of deferrals
are contained in the FDASIA. Unless otherwise required by regulation, the pediatric data requirements do not apply to
products with orphan designation.

Pediatric exclusivity is another type of non-patent marketing exclusivity in the United States and, if granted,

provides for the attachment of an additional six months of marketing protection to the term of any existing regulatory
exclusivity, including the non-patent and orphan exclusivity. This six-month exclusivity may be granted if an NDA sponsor
submits pediatric data that fairly respond to a written request from the FDA for such data. The data do not need to show the
product to be effective in the pediatric population studied; rather, if the clinical trial is deemed to fairly respond to the
FDA’s request, the additional protection is granted. If reports of requested pediatric studies are submitted to and accepted
by the FDA within the statutory time limits, whatever statutory or regulatory periods of exclusivity or patent protection
cover the product are extended by six months. This is not a patent term extension, but it effectively extends the regulatory
period during which the FDA cannot approve another application.

Orphan Drug Designation and Exclusivity

Under the Orphan Drug Act, the FDA may designate a drug product as an “orphan drug” if it is intended to treat a
rare disease or condition (generally meaning that it affects fewer than 200,000 individuals in the United States, or more in
cases in which there is no reasonable expectation that the cost of developing and making a drug product available in the
United States for treatment of the disease or condition will be recovered from sales of the product). A company must
request orphan product designation before submitting an NDA. If the request is granted, the FDA will disclose the identity
of the therapeutic agent and its potential use. Orphan product designation does not convey any advantage in or shorten the
duration of the regulatory review and approval process, although it does convey certain advantages such as tax benefits and
exemption from PDUFA fees.

If a product with orphan status receives the first FDA approval for the disease or condition for which it has such
designation or for a select indication or use within the rare disease or condition for which it was designated, the product
generally will receive orphan product exclusivity. Orphan product exclusivity means that the FDA may not approve any
other applications for the same product for the same indication for seven years, except in certain limited circumstances.
Competitors may receive approval of different products for the indication for which the orphan product has exclusivity and
may obtain approval for the same product but for a different indication. If a drug or drug product designated as an orphan
product ultimately receives marketing approval for an indication broader than what was designated in its orphan product
application, it may not be entitled to exclusivity.

Orphan drug exclusivity will not bar approval of another product under certain circumstances, including if a
subsequent product with the same drug for the same condition is shown to be clinically superior to the approved product on
the basis of greater efficacy or safety, or providing a major contribution to patient care, or if the company with orphan drug
exclusivity is not able to meet market demand. This is the case despite an earlier court opinion holding that the Orphan
Drug Act unambiguously required the FDA to recognize orphan exclusivity regardless of a showing of clinical superiority.

Patent Term Restoration and Extension

A patent claiming a new drug product may be eligible for a limited patent term extension under the Drug Price
Competition and Patent Term Restoration Act of 1984, which permits a patent restoration of up to five years for patent term
lost during product development and the FDA regulatory review. The restoration period granted is typically one-half the
time between the effective date of an IND and the submission date of an NDA, plus the time

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between the submission date of an NDA and the ultimate approval date. Patent term restoration cannot be used to extend
the remaining term of a patent past a total of 14 years from the product’s approval date. Only one patent applicable to an
approved drug product is eligible for the extension, and the application for the extension must be submitted prior to the
expiration of the patent in question. A patent that covers multiple drugs for which approval is sought can only be extended
in connection with one of the approvals. The USPTO reviews and approves the application for any patent term extension or
restoration in consultation with the FDA.

The 21  Century Cures Act

st

On December 13, 2016, President Obama signed the 21st Century Cures Act (the “Cures Act”) into law.  The Cures

Act is designed to modernize and personalize healthcare, spur innovation and research, and streamline the discovery and
development of new therapies through increased federal funding of particular programs.  It authorizes increasing funding
for FDA to spend on innovation projects.  The new law also amends the Public Health Service Act to reauthorize and
expand funding for the National Institutes of Health.  The Act establishes the NIH Innovation Fund to pay for the cost of
development and implementation of a strategic plan, early stage investigators and research.  It also charges NIH with
leading and coordinating expanded pediatric research.  Further, the Cures Act directs the Centers for Disease Control and
Prevention to expand surveillance of neurological diseases.

With amendments to the FDCA and the Public Health Service Act, Title III of the Cures Act seeks to accelerate the

discovery, development, and delivery of new medicines and medical technologies.  To that end, and among other
provisions, the Cures Act reauthorizes the priority review voucher program for certain drugs intended to treat rare pediatric
diseases; creates a new priority review voucher program for drug applications determined to be material threat medical
countermeasure applications; revises the FDCA to streamline review of combination product applications; requires FDA to
evaluate the potential use of “real world evidence” to help support approval of new indications for approved drugs;
provides a new “limited population” approval pathway for antibiotic and antifungal drugs intended to treat serious or life-
threatening infections; and authorizes FDA to designate a drug as a “regenerative advanced therapy,” thereby making it
eligible for certain expedited review and approval designations.

Review and Approval of Drug Products in the European Union

In order to market any product outside of the United States, a company must also comply with numerous and
varying regulatory requirements of other countries and jurisdictions regarding quality, safety and efficacy and governing,
among other things, clinical trials, marketing authorization, commercial sales and distribution of drug products. Whether or
not it obtains FDA approval for a product, the company would need to obtain the necessary approvals by the comparable
foreign regulatory authorities before it can commence clinical trials or marketing of the product in those countries or
jurisdictions. The approval process ultimately varies between countries and jurisdictions and can involve additional product
testing and additional administrative review periods. The time required to obtain approval in other countries and
jurisdictions might differ from and be longer than that required to obtain FDA approval. Regulatory approval in one
country or jurisdiction does not ensure regulatory approval in another, but a failure or delay in obtaining regulatory
approval in one country or jurisdiction may negatively impact the regulatory process in others.

Clinical Trial Approval in the EU

Pursuant to the European Clinical Trials Directive, a system for the approval of clinical trials in the European Union

has been implemented through national legislation of the member states. Under this system, an applicant must obtain
approval from the competent national authority of a European Union member state in which the clinical trial is to be
conducted. Furthermore, the applicant may only start a clinical trial after a competent ethics committee has issued a
favorable opinion. Clinical trial application must be accompanied by an investigational medicinal product dossier with
supporting information prescribed by the European Clinical Trials Directive and corresponding national laws of the
member states and further detailed in applicable guidance documents.  In April 2014, the EU adopted a new Clinical Trials
Regulation, which will be directly applicable to and binding without the need for any national implementing
legislation.  Under the new coordinated procedure for the approval of clinical trials, the sponsor of a clinical trial will be
required to submit a single application for approval of a clinical trial to a reporting EU Member State (RMS) through an
EU Portal. The submission procedure will be the same irrespective of whether the clinical trial is to be conducted in a
single EU Member State or in more than one EU Member State. 

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The Clinical Trials Regulation also aims to streamline and simplify the rules on safety reporting for clinical trials. The
Regulation was published on June 16, 2014 but is not expected to apply until 2019.   

Orphan Drug Designation and Exclusivity

Regulation 141/2000 provides that a drug shall be designated as an orphan drug if its sponsor can establish: that the

product is intended for the diagnosis, prevention or treatment of a life-threatening or chronically debilitating condition
affecting not more than five in ten thousand persons in the European Community when the application is made, or that the
product is intended for the diagnosis, prevention or treatment of a life-threatening, seriously debilitating or serious and
chronic condition in the European Community and that without incentives it is unlikely that the marketing of the drug in
the European Community would generate sufficient return to justify the necessary investment. For either of these
conditions, the applicant must demonstrate that there exists no satisfactory method of diagnosis, prevention or treatment of
the condition in question that has been authorized in the European Community or, if such method exists, the drug will be of
significant benefit to those affected by that condition.

Regulation 847/2000 sets out criteria and procedures governing designation of orphan drugs in the EU. Specifically,
an application for designation as an orphan product can be made any time prior to the filing of an application for approval
to market the product. Marketing authorization for an orphan drug leads to a ten-year period of market exclusivity. This
period may, however, be reduced to six years if, at the end of the fifth year, it is established that the product no longer meets
the criteria for orphan drug designation, for example because the product is sufficiently profitable not to justify market
exclusivity. Market exclusivity can be revoked only in very selected cases, such as consent from the marketing
authorization holder, inability to supply sufficient quantities of the product, demonstration of “clinically relevant
superiority” by a similar medicinal product, or, after a review by the Committee for Orphan Medicinal Products, requested
by a member state in the fifth year of the marketing exclusivity period (if the designation criteria are believed to no longer
apply). Medicinal products designated as orphan drugs pursuant to Regulation 141/2000 shall be eligible for incentives
made available by the European Community and by the member states to support research into, and the development and
availability of, orphan drugs.

Pharmaceutical Coverage, Pricing and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of products approved by the FDA and

other government authorities. Sales of products will depend, in part, on the extent to which the costs of the products will be
covered by third-party payors, including government health programs in the United States such as Medicare and Medicaid,
commercial health insurers and managed care organizations. The process for determining whether a 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 are increasingly challenging the prices charged, examining
the medical necessity, and reviewing the cost-effectiveness of medical products and services and imposing controls to
manage costs.  Third-party payors may also limit coverage to specific products on an approved list, or formulary, which
might not include all of the approved products for a particular indication.

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. A payor’s
decision to provide coverage for a drug product does not imply that an adequate reimbursement rate will be approved.
Third-party reimbursement may not be sufficient to maintain price levels high enough to realize an appropriate return on
investment in product development.

The containment of healthcare costs also has become a priority of federal, state and foreign governments and the

prices of drugs have been a focus in this effort. Governments have shown significant interest in implementing cost-
containment programs, including price controls, restrictions on reimbursement and requirements for substitution of generic
products. Adoption of price controls and cost-containment measures, and adoption of more restrictive policies in
jurisdictions with existing controls and measures, could further limit a company’s revenue generated from the sale of any
approved products. Coverage policies and third-party reimbursement rates may change at any time. Even if favorable
coverage and reimbursement status is attained for one or more products for which a company or its collaborators receive
marketing approval, less favorable coverage

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policies and reimbursement rates may be implemented in the future. In the European Union, pricing and reimbursement
schemes vary widely from country to country. Some countries provide that drug products may be marketed only after a
reimbursement price has been agreed. Some countries may require the completion of additional studies that compare the
cost-effectiveness of a particular drug candidate to currently available therapies, or so-called health technology
assessments, in order to obtain reimbursement or pricing approval. For example, the European Union provides options for
its member states to restrict the range of drug products for which their national health insurance systems provide
reimbursement and to control the prices of medicinal products for human use. European Union member states may approve
a specific price for a drug product or may instead adopt a system of direct or indirect controls on the profitability of the
company placing the drug product on the market. Other member states allow companies to fix their own prices for drug
products, but monitor and control company profits. The downward pressure on health care costs in general, particularly
prescription drugs, has become intense. As a result, increasingly high barriers are being erected to the entry of new
products. In addition, in some countries, cross-border imports from low-priced markets exert competitive pressure that may
reduce pricing within a country. Any country that has price controls or reimbursement limitations for drug products may
not allow favorable reimbursement and pricing arrangements.

Healthcare Law and Regulation

Healthcare providers, physicians and third-party payors play a primary role in the recommendation and prescription

of drug products that are granted marketing approval. Arrangements with providers, consultants, third-party payors and
customers are subject to broadly applicable fraud and abuse and other healthcare laws and regulations. Such restrictions
under applicable federal and state healthcare laws and regulations, include the following:

·

·

·

·

·

·

the federal Anti-Kickback Statute prohibits, among other things, persons from knowingly and willfully
soliciting, offering, receiving or providing remuneration, directly or indirectly, in cash or in kind, to induce or
reward either the referral of an individual for, or the purchase, order or recommendation of, any good or service,
for which payment may be made, in whole or in part, under a federal healthcare program such as Medicare and
Medicaid;

the federal False Claims Act imposes civil penalties, and provides for civil whistleblower or qui tam actions,
against individuals or entities for knowingly presenting, or causing to be presented, to the federal government,
claims for payment that are false or fraudulent or making a false statement to avoid, decrease or conceal an
obligation to pay money to the federal government, with potential liability including mandatory treble damages
and significant per-claim penalties, currently set at $5,500 to $11,000 per false claim;

the federal Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), imposes criminal and civil
liability for executing a scheme to defraud any healthcare benefit program or making false statements relating to
healthcare matters;

HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act and their
respective implementing regulations, including the Final Omnibus Rule published in January 2013, also
imposes obligations, including mandatory contractual terms, with respect to safeguarding the privacy, security
and transmission of individually identifiable health information;

the federal false statements statute 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;

the federal transparency requirements under the Health Care Reform Law, known as the federal Physician
Payments Sunshine Act,  require manufacturers of drugs, devices, biologics and medical supplies to report to
the Centers for Medicare & Medicaid Services (“CMS”) within the Department of Health and Human Services
information related to payments and other transfers of value to physicians and teaching hospitals and physician
ownership and investment interests held by physicians and their immediate family members; and

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·

analogous state and foreign laws and regulations, such as state anti-kickback and false claims laws, may apply
to sales or marketing arrangements and claims involving healthcare items or services reimbursed by non-
governmental third-party payors, including private insurers.

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 health care providers or
marketing expenditures. State and foreign laws also govern the privacy and security of health information in some
circumstances, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus
complicating compliance efforts.

Healthcare Reform in the United States

A primary trend in the United States healthcare industry and elsewhere is cost containment. There have been a

number of federal and state proposals during the last several years regarding the pricing of pharmaceutical and
biopharmaceutical products, limiting coverage and reimbursement for drugs and other medical products, government
control and other changes to the healthcare system in the United States.

By way of example, the United States and state governments continue to propose and pass legislation designed to
reduce the cost of healthcare. In March 2010, the United States Congress enacted the Patient Protection and Affordable
Care Act (the “PPACA”) which, among other things, includes changes to the coverage and payment for products under
government health care programs. Among the provisions of the PPACA of importance to potential drug candidates are:

·

·

·

·

·

·

·

·

an annual, nondeductible fee on any entity that manufactures or imports specified branded prescription drugs
and biologic agents, apportioned among these entities according to their market share in certain government
healthcare programs, although this fee would not apply to sales of certain products approved exclusively for
orphan indications;

expansion of 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 and extending rebate
liability to prescriptions for individuals enrolled in Medicare Advantage plans;

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;

established the Medicare Part D coverage gap discount program by requiring manufacturers to provide a
point‑of‑sale‑discount off the negotiated price of applicable brand drugs to eligible beneficiaries during their
coverage gap period as a condition for the manufacturers’ outpatient drugs to be covered under Medicare
Part D;

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

established the Independent Payment Advisory Board (“IPAB”) which has authority to recommend certain
changes to the Medicare program to reduce expenditures by the program that could result in reduced payments
for prescription drugs. However, the IPAB implementation has been not been clearly defined. The PPACA
provided that under certain circumstances, IPAB recommendations will become law unless Congress enacts
legislation that will achieve the same or greater Medicare cost savings; and

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·

established the Center for Medicare and Medicaid Innovation within CMS to test innovative payment and
service delivery models to lower Medicare and Medicaid spending, potentially including prescription drug
spending. Funding has been allocated to support the mission of the Center for Medicare and Medicaid
Innovation from 2011 to 2019. Other legislative changes have been proposed and adopted since the PPACA was
enacted. These changes include the Budget Control Act of 2011, which, among other things, led to aggregate
reductions to Medicare payments to providers of up to 2% per fiscal year that started in 2013 and will stay in
effect through 2024 unless additional Congressional action is taken, and the American Taxpayer Relief Act of
2012, which, among other things, reduced Medicare payments to several types of providers and increased the
statute of limitations period for the government to recover overpayments to providers from three to five years.
These new laws may result in additional reductions in Medicare and other healthcare funding and otherwise
affect the prices we may obtain for any of our product candidates for which we may obtain regulatory approval
or the frequency with which any such product candidate is prescribed or used. Further, there have been several
recent U.S. congressional inquiries and proposed state and federal legislation designed to, among other things,
bring more transparency to drug pricing, review the relationship between pricing and manufacturer patient
programs, reduce the costs of drugs under Medicare and reform government program reimbursement
methodologies for drug products.

These healthcare reforms, as well as other healthcare reform measures that may be adopted in the future, may result

in additional reductions in Medicare and other healthcare funding, more rigorous coverage criteria, new payment
methodologies and additional downward pressure on the price for any approved product and/or the level of reimbursement
physicians receive for administering any approved product. Reductions in reimbursement levels may negatively impact the
prices or the frequency with which products are prescribed or administered.  Any reduction in reimbursement from
Medicare or other government programs may result in a similar reduction in payments from private payors.  Since
enactment of the PPACA, there have been numerous legal challenges and Congressional actions to repeal and replace
provisions of the law.  In May 2017, the U.S. House of Representatives passed legislation known as the American Health
Care Act of 2017.  Thereafter, the Senate Republicans introduced and then updated a bill to replace the PPACA known as
the Better Care Reconciliation Act of 2017. The Senate Republicans also introduced legislation to repeal the PPACA
without companion legislation to replace it, and a “skinny” version of the Better Care Reconciliation Act of 2017.  In
addition, the Senate considered proposed healthcare reform legislation known as the Graham-Cassidy bill.  None of these
measures was passed by the U.S. Senate.

The Trump Administration has also taken executive actions to repeal or delay implementation of the PPACA.  In

January 2017, President Trump signed an Executive Order directing federal agencies with authorities and responsibilities
under the PPACA to waive, defer, grant exemptions from, or delay the implementation of any provision of the PPACA that
would impose a fiscal or regulatory burden on states, individuals, healthcare providers, health insurers, or manufacturers of
pharmaceuticals or medical devices.  In October 2017, the President signed a second Executive Order allowing for the use
of association health plans and short-term health insurance, which may provide fewer health benefits than the plans sold
through the PPACA exchanges.  At the same time, the Administration announced that it will discontinue the payment of
cost-sharing reduction (“CSR”) payments to insurance companies until Congress approves the appropriation of funds for
such CSR payments. The loss of the CSR payments is expected to increase premiums on certain policies issued by
qualified health plans under the PPACA.  A bipartisan bill to appropriate funds for CSR payments was introduced in the
Senate, but the future of that bill is uncertain.

With enactment of the Tax Cuts and Jobs Act of 2017, which was signed by the President on December 22, 2017,

Congress repealed the “individual mandate.”  The repeal of this provision, which requires most Americans to carry a
minimal level of health insurance, will become effective in 2019.  According to the Congressional Budget Office, the repeal
of the individual mandate will cause 13 million fewer Americans to be insured in 2027 and premiums in insurance markets
may rise.  Additionally, on January 22, 2018, President Trump signed a continuing resolution on appropriations for fiscal
year 2018 that delayed the implementation of certain PPACA-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.  The Congress will likely consider
other legislation to replace elements of the PPACA, during the next Congressional session.

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Further, there have been several recent U.S. congressional inquiries and proposed federal and proposed and enacted
state legislation designed to, among other things, bring more transparency to drug pricing, review the relationship between
pricing and manufacturer patient programs, reduce the costs of drugs under Medicare and reform government program
reimbursement methodologies for drug products. At the federal level, Congress and the Trump administration have each
indicated that it will continue to seek new legislative and/or administrative measures to control drug costs. At the state
level, individual states are 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, and, in some cases, designed to
encourage importation from other countries and bulk purchasing. In addition, regional health care authorities and individual
hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be
included in their prescription drug and other health care programs. These measures could reduce the ultimate demand for
our products, once approved, or put pressure on our product pricing.

Information About Our Executive Officers

See Part III, Item 10. “Directors, Executive Officers and Corporate Governance” for information relating to our

executive officers.

Employees

As of February 15, 2020, we employed 36 individuals, 22 of whom are engaged in research and development

activities and six of whom hold a Ph.D., M.D., or equivalent degree. None of our employees are covered by a collective
bargaining agreement, and we consider relations with our employees to be good.

Corporate Information

We were incorporated in Delaware in 1989 and our office headquarters is located at 505 Eagleview Boulevard, Suite

212, Exton, Pennsylvania 19341.

Information Available on the Internet

Our internet address is www.iderapharma.com. The contents of our website are not part of this Annual Report on

Form 10-K and our internet address is included in this document as an inactive textual reference. We make available free of
charge through our web site our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on
Form 8-K and amendments to these reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as
soon as reasonably practicable after we electronically file or furnish such materials to the SEC. The SEC maintains an
internet site at www.sec.gov containing reports, proxies and information statements and other information regarding issuers
that file electronically with the SEC.

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Item 1A. 

Risk Factors.

RISK FACTORS

Investing  in  our  securities  involves  a  high  degree  of  risk.  You  should  carefully  consider  the  risks  and  uncertainties
described below in addition to the other information included or incorporated by reference in this Annual Report on Form
10-K before purchasing our common stock. Our business, financial condition and results of operations could be materially
and adversely affected by any of these and currently unknown risks or uncertainties. In that case, the market price of our
common stock could decline, and you may lose all or part of your investment in our securities.

Risks Relating to Our Financial Results and Need for Financing

We  will  need  additional  financing,  which  may  be  difficult  to  obtain  on  terms  attractive  to  us  or  at  all.  Our  failure  to
obtain necessary financing or doing so on unattractive terms could result in the termination of our operations and the
sale  and  license  of  our  assets  or  otherwise  adversely  affect  our  research  and  development  programs  and  other
operations.

We had cash, cash equivalents and investments of approximately $42.8 million at December 31, 2019, inclusive of

the $6.2 million contingently refundable option fee received in connection with the December 2019 Securities Purchase
Agreement. We believe, based on our current operating plan, our existing cash, cash equivalents and investments on hand
as of December 31, 2019, excluding the $6.2 million contingently refundable option fee and including interest income and
cash received through February 2020 from the ATM Agreement and LPC Purchase Agreement, both of which are discussed
below within Item 7 of this Annual Report on Form 10-K, will enable us to fund our operations into the first quarter of
2021. Specifically, we believe our available funds will be sufficient to enable us to perform the following:

(i) Complete and disclose results from:

a)

b)

our Phase 1/2 clinical trial of tilsotolimod in combination with ipilimumab and pembrolizumab in anti-
PD1 refractory melanoma (ILLUMINATE-204); and

the Phase 1b monotherapy clinical trial of tilsotolimod in multiple refractory tumor types
(ILLUMINATE-101);

(ii) continue to execute on our ongoing Phase 3 clinical trial of tilsotolimod in combination with ipilimumab for the
treatment of anti-PD1 refractory metastatic melanoma (ILLUMINATE-301), including announcement of top-
line ORR and other preliminary data;

(iii) initiate and complete enrollment in the signal-finding stage of Part I of our Phase 2 study of tilsotolimod in
combination with nivolumab and ipilimumab for the treatment of MSS-CRC (ILLUMINATE-206), pending
results from the initial group of ten patients enrolled to evaluate safety;

(iv) fund certain investigator initiated clinical trials of tilsotolimod; and

(v) maintain our current level of general and administrative expenses in order to support the business.

We expect that we will need to raise additional funds in order to complete our ongoing clinical trials of tilsotolimod

and to continue to fund our operations. We are seeking and expect to continue to seek additional funding through
collaborations, the sale or license of assets or financings of equity or debt securities. We believe that the key factors that
will affect our ability to obtain funding are:

(i)

the results of our clinical development activities in our tilsotolimod program or any other drug candidates we
develop on the timelines anticipated;  

(ii) the cost, timing, and outcome of regulatory reviews;

(iii) competitive and potentially competitive products and technologies and investors' receptivity to tilsotolimod or
any other drug candidates we develop and the technology underlying them in light of competitive products and
technologies;

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(iv) the receptivity of the capital markets to financings by biotechnology companies generally and companies with

drug candidates and technologies similar to ours specifically;

(v) the receptivity of the capital markets to any in-licensing, product acquisition or other transaction we may enter

into; and

(vi) our ability to enter into additional collaborations with biotechnology and pharmaceutical companies and the

success of such collaborations.

In addition, increases in expenses or delays in clinical development may adversely impact our cash position and

require additional funds or cost reductions.

Financing may not be available to us when we need it or may not be available to us on favorable or acceptable terms
or at all. We could be required to seek funds through collaborative alliances or through other means that may require us to
relinquish rights to some of our technologies, drug candidates or drugs that we would otherwise pursue on our own. In
addition, if we raise additional funds by issuing equity securities, our then existing stockholders may experience dilution.
The terms of any financing may adversely affect the holdings or the rights of existing stockholders. An equity financing
that involves existing stockholders may cause a concentration of ownership. Debt financing, if available, may involve
agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional
debt, making capital expenditures or declaring dividends, and are likely to include rights that are senior to the holders of
our common stock. Any additional debt or equity financing may contain terms which are not favorable to us or to our
stockholders, such as liquidation and other preferences, or liens or other restrictions on our assets. As discussed in Note 14
to the financial statements appearing elsewhere in this Annual Report on Form 10-K, additional equity financings may also
result in cumulative changes in ownership over a three-year period in excess of 50% which would limit the amount of net
operating loss and tax credit carryforwards that we may utilize in any one year.

If we are unable to obtain adequate funding on a timely basis or at all, we will be required to terminate, modify or

delay clinical trials of tilsotolimod, or relinquish rights to portions of our technology, drug candidates and/or products.

We have incurred substantial losses and expect to continue to incur losses. We will not be successful unless we reverse
this trend.

As of December 31, 2019, we had an accumulated deficit of $720.9 million. Since January 1, 2001, we have

primarily been involved in the development of our TLR pipeline. From January 1, 2001 to December 31, 2019, we incurred
losses of $460.7 million. We incurred losses of $260.2 million prior to December 31, 2000, during which time we were
primarily involved in the development of earlier generation antisense technology. These losses, among other things, have
had and will continue to have an adverse effect on our stockholders' equity, total assets and working capital.

We have never had any products of our own available for commercial sale and have received no revenues from the

sale of drugs. As of December 31, 2019, substantially all of our revenues have been from collaborative and license
agreements. We have devoted substantially all of our efforts to research and development, including clinical trials, and have
not completed development of any drug candidates. Because of the numerous risks and uncertainties associated with
developing drugs, we are unable to predict the extent of any future losses, whether or when any of our drug candidates will
become commercially available, or when we will become profitable, if at all. We expect to incur substantial operating
losses in future periods.

Risks Relating to Our Business, Strategy and Industry

We are depending heavily on the development of our lead TLR-targeted drug candidate, tilsotolimod, in our immuno-
oncology program. If we terminate the development of this program or are unable to successfully develop and
commercialize tilsotolimod or any other drug candidate, or experience significant delays in doing so, our business may
be materially harmed.

We have invested a significant portion of our time and financial resources in the development of TLR-targeted
clinical-stage drug candidates as part of our immuno-oncology and rare disease programs. In the future, we intend to
continue to invest a significant portion of our time and financial resources in the development of our lead TLR-

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targeted candidate, tilsotolimod, in our immuno-oncology program. For instance, we are conducting (i) a Phase 1/2 clinical
trial of tilsotolimod, administered intratumorally, in combination with ipilimumab or pembrolizumab in patients with anti-
PD1 refractory metastatic melanoma, (ii) a Phase 2 clinical trial of tilsotolimod in combination with nivolumab and
ipilimumab for the treatment of MSS-CRC tumor types, (iii) a Phase 3 clinical trial of tilsotolimod, administered
intratumorally, in combination with ipilimumab in patients with anti-PD1 refractory metastatic melanoma, and (iv) a Phase
1b trial of tilsotolimod, administered intratumorally, as a monotherapy in patients with refractory solid tumors.  

We anticipate that our ability to generate product revenues will depend heavily on the successful development and

commercialization of our TLR drug candidate, tilsotolimod.

Our ability to generate future milestone and royalty revenues under our current collaboration with GSK, and under

any other collaboration that we enter into with respect to our other programs, will depend on the development and
commercialization of the drug candidates being developed under the collaborations.

We have entered into and may in the future continue to seek to enter into collaborative alliances with pharmaceutical
companies to advance our TLR agonists and antagonist candidates and with respect to additional applications of our nucleic
acid chemistry technology program, which we suspended internally in 2018. Should we in the future seek to do so, we may
not be able to enter into such agreements on attractive terms or at all.

Our ability to successfully develop and commercialize potential drug candidates will depend on our ability to

overcome these recent challenges and on several factors, including the following:

·

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·

·

·

·

·

·

·

·

·

·

·

·

·

·

·

the drug candidates demonstrating activity in clinical trials;

the  drug  candidates  demonstrating  an  acceptable  safety  profile  in  nonclinical  toxicology  studies  and  during
clinical trials;

timely  enrollment  in  clinical  trials  of  drug  candidates,  which  may  be  slower  than  anticipated,  potentially
resulting in significant delays;

satisfying  conditions  imposed  on  us  and/or  our  collaborators  by  the  FDA  or  equivalent  foreign  regulatory
authorities regarding the scope or design of clinical trials;

the ability to demonstrate to the satisfaction of the FDA, or equivalent foreign regulatory authorities, the safety
and efficacy of the drug candidates through current and future clinical trials;

timely receipt of necessary marketing approvals from the FDA and equivalent foreign regulatory authorities;

the ability to combine our drug candidates and the drug candidates being developed by our collaborators and
any other collaborators safely and successfully with other therapeutic agents;

achieving and maintaining compliance with all regulatory requirements applicable to the products;

establishment of commercial manufacturing arrangements with third-party manufacturers;

the ability to secure orphan drug exclusivity for our drug candidates either alone or in combination with other
products;

the successful commercial launch of the drug candidates, assuming FDA approval is obtained, whether alone or
in combination with other products;

acceptance of the products as safe and effective by patients, the medical community, and third-party payors;

competition from other companies and their therapies;

changes in treatment regimens;

favorable market conditions in which to raise additional capital;

the strength of our intellectual property portfolio in the United States and abroad; and

a continued acceptable safety and efficacy profile of the drug candidates following marketing approval.

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  We  are  developing  tilsotolimod  in  combination  with  other  immuno-modulatory  compounds  and  chemotherapeutic
agents and our efforts may not be successful or result in any approved and marketable products.

Tilsotolimod is being developed for administration via intratumoral injection in combination with systemically

administered checkpoint inhibitors for the treatment of various solid tumors, including (i) anti-PD1 refractory metastatic
melanoma in combination with ipilimumab, (ii) microsatellite stable colorectal cancer in combination with nivolumab and
ipilimumab, and (iii) squamous cell carcinoma of the head and neck in combination with ABBV-368 and other therapy
combinations. While we have evaluated the safety profile of tilsotolimod as a single agent via intratumoral injection in
previous trials, and as marketed products the safety profiles of ipilimumab and nivolumab are each known, the safety
profile of the combination of tilsotolimod with ipilimumab and/or nivolumab are still being evaluated. Further, we recently
entered into the AbbVie Agreement under which AbbVie will conduct a clinical study to evaluate the efficacy and safety of
combinations of an OX40 agonist (ABBV-368), tilsotolimod, nab-paclitaxel and/or an anti-programmed cell death 1 (PD-1)
antagonist (ABBV-181).These factors may result in participating subjects experiencing serious adverse events or
undesirable side effects or exposure to unacceptable health risks requiring us or AbbVie to suspend or terminate any
clinical trials which are being conducted with tilsotolimod and other therapeutic agents.

If we experience delays or difficulties in the enrollment of patients in clinical trials, our receipt of necessary regulatory
approvals could be delayed or prevented.

We may not be able to initiate or continue clinical trials for our drug candidates if we are unable to locate and enroll a

sufficient number of eligible patients to participate in these trials as required by the FDA or similar regulatory authorities
outside the United States. Additionally, because there are a limited number of patients with dermatomyositis, or other rare
diseases having indications for which we may determine to develop our TLR antagonists, our ability to enroll eligible
patients in any clinical trials for these indications may be limited or may result in slower enrollment than we anticipated. In
addition, some of our competitors have ongoing clinical trials for drug candidates that treat the same indications as our drug
candidates, and patients who would otherwise be eligible for our clinical trials may instead enroll in clinical trials of our
competitors' drug candidates.

Patient enrollment can be affected by other factors, including the:

·

·

·

·

·

·

·

·

severity of the disease under investigation;

eligibility criteria for the trial in question;

perceived risks and benefits of the TLR-targeted drug candidates under study;

efforts to facilitate timely enrollment in clinical trials;

availability of competing clinical trials or other therapies;

patient referral practices of physicians;

ability to monitor patients adequately during and after treatment; and

proximity and availability of clinical trial sites for prospective patients.

Our inability to enroll a sufficient number of patients for our clinical trials would result in significant delays and
could require us to abandon one or more clinical trials altogether. Enrollment delays in our clinical trials may result in
increased development costs for our drug candidates, which would cause the value of our company to decline and limit our
ability to obtain additional financing.

If  our  clinical  trials  are  unsuccessful,  or  if  they  are  delayed  or  terminated,  we  may  not  be  able  to  develop  and
commercialize our drug candidates.

In order to obtain regulatory approvals for the commercial sale of our drug candidates, we are required to complete

extensive clinical trials in humans to demonstrate the safety and efficacy of our drug candidates. Clinical trials are lengthy,
complex, and expensive processes with uncertain results. We may not be able to complete any clinical trial of a potential
product within any specified time period. Moreover, clinical trials may not show our potential products to be both safe and
efficacious. The FDA or other equivalent foreign regulatory agencies may not allow us to complete these trials or
commence and complete any other clinical trials.

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The results from preclinical testing of a drug candidate that is under development may not be predictive of results

that will be obtained in human clinical trials. In addition, the results of early human clinical trials may not be predictive of
results that will be obtained in larger scale, advanced stage clinical trials.

Furthermore, interim results of a clinical trial do not necessarily predict final results, and failure of any of our clinical
trials can occur at any stage of testing. Companies in the biotechnology and pharmaceutical industries, including companies
with greater experience in preclinical testing and clinical trials than we have, have suffered significant setbacks in clinical
trials, even after demonstrating promising results in earlier trials. Moreover, effects seen in nonclinical studies, even if not
observed in clinical trials, may result in limitations or restrictions on clinical trials. Numerous unforeseen events may occur
during, or as a result of, preclinical testing, nonclinical testing or the clinical trial process that could delay or inhibit the
ability to receive regulatory approval or to commercialize drug products.

Other companies developing drugs targeted to TLRs have experienced setbacks in clinical trials. These setbacks may

result in enhanced scrutiny by regulators or institutional review boards (“IRBs”) of clinical trials of our drug candidates,
including our TLR-targeted drug candidates, which could result in regulators or IRBs prohibiting the commencement of
clinical trials, requiring additional nonclinical studies as a precondition to commencing clinical trials or imposing
restrictions on the design or scope of clinical trials that could slow enrollment of trials, increase the costs of trials or limit
the significance of the results of trials. Such setbacks could also adversely impact the desire of investigators to enroll
patients in, and the desire of patients to enroll in, clinical trials of our drug candidates.

Other events that could delay or inhibit conduct of our clinical trials include:

·

·

·

·

·

·

·

·

·

·

·

regulators or IRBs may not authorize us to commence a clinical trial or conduct a clinical trial at a prospective
trial site;

nonclinical or clinical data may not be readily interpreted, which may lead to delays and/or misinterpretation;

our nonclinical tests, including toxicology studies, or clinical trials may produce negative or inconclusive
results, and we may decide, or regulators may require us, to conduct additional nonclinical testing or clinical
trials or we may abandon projects that we expect may not be promising;

the rate of enrollment or retention of patients in our clinical trials may be lower than we expect;

we might have to suspend or terminate our clinical trials if the participating subjects experience serious adverse
events or undesirable side effects or are exposed to unacceptable health risks;

regulators or IRBs may hold, suspend or terminate clinical research for various reasons, including
noncompliance with regulatory requirements, issues identified through inspections of manufacturing or clinical
trial operations or clinical trial sites, or if, in their opinion, the participating subjects are being exposed to
unacceptable health risks;

regulators may hold or suspend our clinical trials while collecting supplemental information on, or clarification
of, our clinical trials or other clinical trials, including trials conducted in other countries or trials conducted by
other companies;

we, along with our collaborators and subcontractors, may not employ, in any capacity, persons who have been
debarred under the FDA's Application Integrity Policy, or similar policy under foreign regulatory authorities.
Employment of such debarred persons, even if inadvertent, may result in delays in the FDA's or foreign
equivalent's review or approval of our drug candidates, or the rejection of data developed with the involvement
of such person(s);

we or our contract manufacturers may be unable to manufacture sufficient quantities of our drug candidates for
use in clinical trials;

the cost of our clinical trials may be greater than we currently anticipate making continuation and/or completion
improbable; and

our drug candidates may not cause the desired effects or may cause undesirable side effects or our drug
candidates may have other unexpected characteristics.

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We do not know whether clinical trials will begin as planned, will need to be restructured or will be completed on
schedule, if at all. Significant clinical trial delays also could allow our competitors to bring products to market before we do
and impair our ability to commercialize our drug candidates.

Delays in commencing clinical trials of potential products could increase our costs, delay any potential revenues, and
reduce the probability that a potential product will receive regulatory approval.

Our drug candidates and our collaborators' drug candidates will require preclinical and other nonclinical testing and

extensive clinical trials prior to submission of any regulatory application for commercial sales. In conducting clinical trials,
we cannot be certain that any planned clinical trial will begin on time, if at all. Delays in commencing clinical trials of
potential products could increase our drug candidate development costs, delay any potential revenues, reduce the potential
length of patent exclusivity and reduce the probability that a potential product will receive regulatory approval.

Commencing clinical trials may be delayed for a number of reasons, including delays in:

· manufacturing sufficient quantities of drug candidate that satisfy the required quality standards for use in

clinical trials;

·

·

·

·

·

·

·

demonstrating sufficient safety to obtain regulatory approval for conducting a clinical trial;

reaching an agreement with any collaborators on all aspects of the clinical trial;

reaching agreement with contract research organizations, if any, and clinical trial sites on all aspects of the
clinical trial;

resolving any objections from the FDA or any regulatory authority on an IND or proposed clinical trial design;

obtaining additional financing;

obtaining IRB approval for conducting a clinical trial at a prospective site; and

enrolling patients in order to commence the clinical trial.

The technologies on which we rely are unproven and may not result in any approved and marketable products.

Our technologies or therapeutic approaches are relatively new and unproven. We have focused our efforts on the
research and development of RNA- and DNA-based compounds, or oligonucleotides, targeted to TLRs. Neither we nor any
other company have obtained regulatory approval to market such TLR-targeted drug candidates as therapeutic drugs, and
no such products currently are being marketed. The results of preclinical studies with TLR-targeted compounds may not be
indicative of results that may be obtained in clinical trials, and results we have obtained in the clinical trials we have
conducted to date may not be predictive of results in subsequent large-scale clinical trials. Further, the chemical and
pharmacological properties of RNA- and DNA-based compounds targeted to TLRs may not be fully recognized in
preclinical studies and small-scale clinical trials, and such compounds may interact with human biological systems in
unforeseen, ineffective or harmful ways that we have not yet identified.

Moreover, only five nucleic acid-based therapeutics have been approved by the FDA for marketing in the United

States since 1998 and are currently being marketed. As such, oligonucleotides as a chemical class of drug candidates have
limited precedence for successful late-stage development and regulatory approval.

As a result of these factors, we may never succeed in obtaining regulatory approval to market any product.

Furthermore, the commercial success of any of our drug candidates for which we may obtain marketing approval from the
FDA or other regulatory authorities will depend upon their acceptance by patients, the medical community, and third-party
payors as clinically useful, safe, and cost-effective. In addition, if products being developed by our competitors have
negative clinical trial results or otherwise are viewed negatively, the perception of our technologies and market acceptance
of our drug candidates could be impacted negatively.

Our setbacks with respect to our TLR-targeted compounds, together with the setbacks experienced by other
companies developing oligonucleotides-based compounds and TLR-targeted compounds, may result in a negative
perception of our technology and our TLR-targeted compounds, impact our ability to obtain marketing approval of

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these drug candidates and adversely affect acceptance of our technology and our TLR-targeted compounds by patients, the
medical community and third-party payors.

Our efforts to educate the medical community on our potentially unique approaches may require greater resources
than would be typically required for products based on conventional technologies or therapeutic approaches. The safety,
efficacy, convenience, and cost-effectiveness of our drug candidates as compared to competitive products will also affect
market acceptance.

We face substantial competition, which may result in others discovering, developing or commercializing drugs before or
more successfully than us.

We are currently developing tilsotolimod (IMO-2125), our TLR agonist drug candidate, for the treatment by

intratumoral injection of multiple oncology indications in combination with checkpoint inhibitors. In the immune-oncology
environment, there are many other companies, public and private, that are actively engaged in discovery, development, and
commercializing products and technologies that may compete with our drug candidate and program, including TLR-
targeted compounds as well as non-TLR-targeted therapeutics. 

Immuno-oncology, which utilizes a patient’s own immune system to combat cancer, is currently an active area of

research for biotechnology and pharmaceutical companies. Interest in immuno-oncology is driven by efficacy data in
cancers with historically bleak outcomes and the potential to achieve a cure or functional cure for some patients. As such,
we expect that our efforts in this field will be competitive with a wide variety of different approaches. Any one of these
competitive approaches may result in the development of novel technologies that are more effective, safer or less costly
than any that we are developing.

We are aware of other companies developing TLR agonists as well as other mechanisms of action that are focused on

stimulating the immune response. These companies include, but are not limited to, Aduro Biotech, Inc., BioLineRx Ltd.,
Checkmate Pharmaceuticals, Inc., Dynavax Technologies Corporation, Exicure, Inc., Gilead Sciences Inc.,
GlaxoSmithKline plc, Hoffmann-La Roche Ltd., Innate Immunotherapeutics Ltd., Mologen AG VentiRx Pharmaceuticals
Inc., Nektar Therapeutics, and Telormedix S.A. Additionally, we are aware of other companies developing non-TLR
therapies in our patient populations including, but not limited to OncoSec Immunotherapies, Iovance Biotherapeutics, Lytix
Biopharma and Takara Bio.

Some potentially competitive products have been in development or commercialized for years, in some cases by
large, well established pharmaceutical companies. Many of the marketed products have been accepted by the medical
community, patients, and third-party payors. Our ability to compete may be affected by the previous adoption of such
products by the medical community, patients, and third-party payors. Additionally, in some instances, insurers and other
third-party payors seek to encourage the use of generic products, which makes branded products, such as is planned for our
drug candidates upon commercialization, potentially less attractive, from a cost perspective, to buyers.

We recognize that other companies, including large pharmaceutical companies, may be developing or have plans to

develop products and technologies that may compete with ours. Many of our competitors have substantially greater
financial, technical, and human resources than we have. In addition, many of our competitors have significantly greater
experience than we have in undertaking preclinical studies and human clinical trials of new pharmaceutical products,
obtaining FDA and other regulatory approvals of products for use in health care and manufacturing, and marketing and
selling approved products. Our competitors may discover, develop or commercialize products or other novel technologies
that are more effective, safer or less costly than any that we are developing. Our competitors may also obtain FDA or other
regulatory approval for their products more rapidly than we may obtain approval for ours.

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We anticipate that the competition with our drug candidates and technologies will be based on a number of factors

including product efficacy, safety, availability, and price. The timing of market introduction of our drug candidates and
competitive products will also affect competition among products. We expect the relative speed with which we can develop
products, complete the clinical trials and approval processes, and supply commercial quantities of the products to the
market to be important competitive factors. Our competitive position will also depend upon our ability to attract and retain
qualified personnel, to obtain patent protection or otherwise develop proprietary products or processes, protect our
intellectual property, and to secure sufficient capital resources for the period between technological conception and
commercial sales.

We  face  risks  related  to  health  epidemics  and  other  outbreaks  of  communicable  diseases,  which  could  significantly
disrupt our operations and may materially and adversely affect our business and financial condition.

Our business could be adversely impacted by the effects of the coronavirus or other epidemics. In December 2019, a

novel strain of the coronavirus (COVID-19) emerged in China and the virus has now spread to several other countries,
including Europe and the U.S., and infections have been reported globally. The extent to which the coronavirus impacts our
operations will depend on future developments, which are highly uncertain and cannot be predicted at this time, and
include the duration, severity and scope of the outbreak and the actions taken to contain or treat the coronavirus
outbreak. The continued spread of the coronavirus globally could materially and adversely impact our operations including
without limitation, our clinical trial operations, regulatory approval and the timing thereof, the operations of our
collaboration partners, travel, employee health and availability which may have a material and adverse impact on our
business, financial condition and results of operations. For example, with respect to our ILLUMINATE-301 trial, the
coronavirus outbreak could impact our ability to obtain results if trial participants are unable to travel to and from clinical
sites for administration of the therapies and/or for scans or testing pursuant to the ILLUMINATE-301 trial protocol; deliver
clinical trial supplies to clinical trial sites; conduct the trial if clinical trial sites close; and produce accurate results if the
pandemic is found to impact trial endpoints.

In addition, a significant outbreak of coronavirus could result in widespread global health crisis that could adversely

affect global economies and financial markets resulting in an economic downturn that could affect future revenue and
operating results.  

Risks Related to Human Capital Management

The  loss  of  key  personnel,  especially  our  principal  executive  officer,  could  delay  or  prevent  us  from  achieving  our
objectives.

Our success is highly dependent on the retention of principal members of our technical and management staff,

including our President and Chief Executive Officer, Mr. Vincent Milano.

We are a party to an employment agreement with Mr. Milano, which is terminable upon 15 days prior written notice
at the election of either party and immediately in the event of a termination for cause (as defined therein). We do not carry
key man life insurance for Mr. Milano.

Competition for technical and management personnel is intense in our industry, and we may not be able to sustain our
operations or grow if we are unable to attract and retain key personnel.

Our future growth will require hiring a number of qualified technical and management personnel. Accordingly,
recruiting and retaining such personnel in the future will be critical to our success. There is intense competition from other
companies and research and academic institutions for qualified personnel in the areas of our activities. If we are not able to
continue to attract and retain, on acceptable terms, the qualified personnel necessary for the continued development of our
business, we may not be able to sustain our operations or growth.

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Because we are a small biopharmaceutical-focused company with limited resources, we may be unable to attract and
retain qualified personnel; the termination of relationships with key management, consulting and scientific personnel
or the inability to recruit and retain additional personnel could prevent us from developing our technologies, conducting
clinical trials and/or obtaining financing.

We are a small company and we rely heavily on third parties and outside consultants to conduct many important

functions. As of December 31, 2019, we had 36 full-time employees. We may require additional experienced executive,
accounting, legal, administrative and other personnel from time to time in the future. Also, because of the specialized
scientific nature of our business, our ability to develop products and to compete with our current and future competitors
largely depends upon our ability to attract, retain and motivate highly-qualified managerial, consulting and scientific
personnel. If we are unable to retain the services of one or more of the principal members of senior management,
consultants or other key employees, our ability to implement our business strategy could be materially harmed. We face
intense competition for qualified employees and consultants from biopharmaceutical companies, research organizations and
academic institutions. Attracting, retaining or replacing these personnel on acceptable terms may be difficult and time-
consuming given the high demand in our industry for similar personnel. There is intense competition for qualified
personnel in the areas of our activities, and we cannot assure you that we will be able to continue to attract and retain the
qualified personnel necessary for the development of our business.

Risks Related to Regulatory Approval and Marketing of Our Drug Candidates and Other
Legal Compliance Matters

Even if we complete the necessary preclinical studies and clinical trials, the marketing approval process is expensive,
time-consuming and uncertain and may prevent us from obtaining approvals for the commercialization of some or all of
our drug candidates. As a result, we cannot predict when or if we, or any future collaborators, will obtain marketing
approval to commercialize a drug candidate.

Our drug candidates and the activities associated with their development and commercialization, including their

design, testing, manufacture, safety, efficacy, recordkeeping, labeling, storage, approval, marketing, promotion, sale and
distribution, export and import are subject to extensive regulation by the FDA and comparable foreign regulatory
authorities, whose laws and regulations may differ from country to country. We are not permitted to market our drug
candidates in the United States or in other countries until we, or any future collaborators, receive approval of an NDA from
the FDA or marketing approval from applicable regulatory authorities outside of the United States.

All of the drug candidates that we are developing, or may develop in the future, will require additional research and

development, extensive preclinical studies, nonclinical testing, clinical trials, and regulatory approval prior to any
commercial sales. This process is lengthy, often taking a number of years, is uncertain, and is expensive. Securing
marketing approval requires the submission of extensive preclinical and clinical data and supporting information to
regulatory authorities for each therapeutic indication to establish the drug candidate's safety and purity. Securing marketing
approval also requires the submission of information about the product manufacturing process to, and inspection of
manufacturing facilities by, the regulatory authorities.

Since our inception, we have conducted, or collaborated with others to conduct, clinical trials of a number of

compounds and for a number of disease indications.

The FDA and other regulatory authorities may not approve any of our potential products for any indication.

We  may  need  to  address  a  number  of  technological  challenges  in  order  to  complete  development  of  our  drug
candidates.  Moreover,  these  products  may  not  be  effective  in  treating  any  disease  or  may  prove  to  have  undesirable  or
unintended side effects, unintended alteration of the immune system over time, toxicities or other characteristics that may
preclude our obtaining regulatory approval or prevent or limit commercial use. In addition, changes in marketing approval
policies  during  the  development  period,  changes  in  or  the  enactment  of  additional  statutes  or  regulations,  or  changes  in
regulatory review for each submitted product application, may cause delays in the approval or rejection of an application.
The FDA and comparable authorities in other countries have substantial discretion in the approval process and may refuse
to accept any application or may decide that our data is insufficient for approval and require additional preclinical, clinical
or other studies. In addition, varying interpretations of the data obtained from preclinical and clinical testing could delay,
limit or prevent marketing approval of a drug candidate.

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Any delay in obtaining or failure to obtain required approvals could materially adversely affect our ability or that of

any collaborators we may have to generate revenue from the particular drug candidate, which likely would result in
significant harm to our financial position and adversely impact our stock price.

Our  failure  to  obtain  marketing  approval  in  foreign  jurisdictions  would  prevent  our  drug  candidates  from  being
marketed  abroad,  and  any  approval  we  are  granted  for  our  drug  candidates  in  the  United  States  would  not  assure
approval of drug candidates in foreign jurisdictions.

In order to market and sell our drugs in the European Union and many other jurisdictions, we, and any future
collaborators, must obtain separate marketing approvals and comply with numerous and varying regulatory requirements.
The approval procedure varies among countries and can involve additional testing. The time required to obtain approval
may differ substantially from that required to obtain FDA approval. The marketing approval process outside of the United
States generally includes all of the risks associated with obtaining FDA approval. In addition, in many countries outside of
the United States, it is required that the drug be approved for reimbursement before the drug can be approved for sale in
that country. We, and any future collaborators, may not obtain approvals from regulatory authorities outside of the United
States on a timely basis, if at all. Approval by the FDA does not ensure approval by regulatory authorities in other countries
or jurisdictions, and approval by one regulatory authority outside of the United States does not ensure approval by
regulatory authorities in other countries or jurisdictions or by the FDA.

Additionally, on June 23, 2016, the electorate in the United Kingdom (“U.K.”) voted in favor of leaving the
European Union (“E.U.”), commonly referred to as Brexit. On March 29, 2017, the U.K. formally notified the E.U. of its
intention to withdraw pursuant to Article 50 of the Lisbon Treaty and began to negotiate the terms of its withdrawal and
outline the future relationship between the U.K. and E.U. upon exit, which occurred on January 31, 2020. Following the
U.K.’s departure, there is now a transition period during which existing arrangements will remain in place until the end of
2020, allowing detailed discussions on the future relationship between the U.K. and the E.U. to take place.

The potential impact on our future results of operations and liquidity resulting from Brexit remains unclear. The

actual effects of Brexit will depend upon many factors and significant uncertainty remains with respect to the future
relationship between the U.K. and the E.U. The final outcome of the discussions during the transition period may impact
certain business operations, such as forcing us to restrict or delay efforts to develop or seek regulatory approval in the U.K.
and/or E.U., including the approval and supply of our drug candidates. Such delays in obtaining, or an inability to obtain,
any marketing approvals, as a result of Brexit or otherwise, would prevent us from commercializing our drug candidates in
the U.K. and/or the E.U. and restrict our ability to generate revenue in these jurisdictions which may impact our ability to
achieve and sustain profitability which may significantly and materially harm our business.

Even if we, or any future collaborators, obtain marketing approvals for our drug candidates, the terms of approvals and
ongoing regulation of our drugs may limit how we, or they, manufacture and market our drugs, which could materially
impair our ability to generate revenue.

Once marketing approval has been granted, an approved drug and its manufacturer and marketer are subject to
ongoing review and extensive regulation. We, and any future collaborators, must therefore comply with requirements
concerning advertising and promotion for any of our drug candidates for which we or they obtain marketing approval.
Promotional communications with respect to prescription drugs are subject to a variety of legal and regulatory restrictions
and must be consistent with the information in the drug’s approved labeling. Thus, we, and any future collaborators, may
not be able to promote any drugs we develop for indications or uses for which they are not approved.

In addition, manufacturers of approved drugs and those manufacturers’ facilities are required to comply with

extensive FDA requirements, including ensuring that quality control and manufacturing procedures conform to cGMPs,
which include requirements relating to quality control and quality assurance as well as the corresponding maintenance of
records and documentation and reporting requirements. We, our contract manufacturers, our future collaborators and their
contract manufacturers could be subject to periodic unannounced inspections by the FDA to monitor and ensure
compliance with cGMPs.

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Accordingly, assuming we, or our future collaborators, receive marketing approval for one or more of our drug
candidates, we, and our future collaborators, and our and their contract manufacturers will continue to expend time, money
and effort in all areas of regulatory compliance, including manufacturing, production, product surveillance and quality
control.

If we, and our future collaborators, are not able to comply with post-approval regulatory requirements, we, and our
future collaborators, could have the marketing approvals for our drugs withdrawn by regulatory authorities and our, or our
future collaborators’, ability to market any future drugs could be limited, which could adversely affect our ability to
achieve or sustain profitability. Further, the cost of compliance with post-approval regulations may have a negative effect
on our operating results and financial condition.

Moreover,  legislative  and  regulatory  proposals  have  been  made  to  expand  post-approval  requirements  and  restrict
sales and promotional activities for pharmaceutical products. We cannot be sure whether additional legislative changes will
be  enacted,  or  whether  the  FDA  regulations,  guidance  or  interpretations  will  be  changed,  or  what  the  impact  of  such
changes on the marketing approvals of our drug candidates, if any, may be. In addition, increased scrutiny by the United
States Congress of the FDA's approval process may significantly delay or prevent marketing approval, as well as subject us
and any collaborators to more stringent product labeling and post-marketing testing and other requirements.

Any of our drug candidates for which we, or our future collaborators, obtain marketing approval in the future could be
subject  to  post-marketing  restrictions  or  withdrawal  from  the  market  and  we,  and  our  future  collaborators,  may  be
subject to substantial penalties if we, or they, fail to comply with regulatory requirements or if we, or they, experience
unanticipated problems with our drugs following approval.

Any of our drug candidates for which we, or our future collaborators, obtain marketing approval in the future, as

well as the manufacturing processes, post-approval studies and measures, labeling, advertising and promotional activities
for such drug, among other things, will be subject to continual requirements of and review by the FDA and other regulatory
authorities. These requirements include submissions of safety and other post-marketing information and reports,
registration and listing requirements, requirements relating to manufacturing, quality control, quality assurance and
corresponding maintenance of records and documents, requirements regarding the distribution of samples to physicians and
recordkeeping. Even if marketing approval of a drug candidate is granted, the approval may be subject to limitations on the
indicated uses for which the drug may be marketed or to the conditions of approval, including the requirement to
implement a Risk Evaluation and Mitigation Strategy, which could include requirements for a restricted distribution
system.

The FDA may also impose requirements for costly post-marketing studies or clinical trials and surveillance to
monitor the safety or efficacy of a drug. The FDA and other agencies, including the DOJ, closely regulate and monitor the
post-approval marketing and promotion of drugs to ensure that they are manufactured, marketed and distributed only for
the approved indications and in accordance with the provisions of the approved labeling. The FDA imposes stringent
restrictions on manufacturers’ communications regarding off-label use and if we, or our future collaborators, do not market
any of our drug candidates for which we, or they, receive marketing approval for only their approved indications, we, or
they, may be subject to warnings or enforcement action for off-label marketing. Violation of the FDCA and other statutes,
including the False Claims Act, relating to the promotion and advertising of prescription drugs may lead to investigations
or allegations of violations of federal and state health care fraud and abuse laws and state consumer protection laws.

In addition, later discovery of previously unknown adverse events or other problems with our drugs or their
manufacturers or manufacturing processes, or failure to comply with regulatory requirements, may yield various results,
including:

·

·

·

·

·

litigation involving patients taking our drug;

restrictions on such drugs, manufacturers or manufacturing processes;

restrictions on the labeling or marketing of a drug;

restrictions on drug distribution or use;

requirements to conduct post-marketing studies or clinical trials;

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·

·

·

·

·

·

·

·

·

·

·

warning letters or untitled letters;

withdrawal of the drugs from the market;

refusal to approve pending applications or supplements to approved applications that we submit;

recall of drugs;

fines, restitution or disgorgement of profits or revenues;

suspension or withdrawal of marketing approvals;

damage to relationships with any potential collaborators;

unfavorable press coverage and damage to our reputation;

refusal to permit the import or export of drugs;

drug seizure; or

injunctions or the imposition of civil or criminal penalties.

Under the CURES Act and the Trump Administration’s regulatory reform initiatives, the FDA’s policies, regulations
and guidance may be revised or revoked and that could prevent, limit or delay regulatory approval of our drug
candidates, which would impact our ability to generate revenue.

In December 2016, the 21st Century Cures Act, or Cures Act, was signed into law. The Cures Act, among other

things, is intended to modernize the regulation of drugs and spur innovation, but its ultimate implementation is unclear. If
we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we
are not able to maintain regulatory compliance, we may lose any marketing approval that we may have obtained and we
may not achieve or sustain profitability, which would adversely affect our business, prospects, financial condition and
results of operations.

We also cannot predict the likelihood, nature or extent of government regulation that may arise from future
legislation or administrative or executive action, either in the United States or abroad. For example, certain policies of the
Trump administration may impact our business and industry. Namely, the Trump administration has taken several executive
actions, including the issuance of a number of Executive Orders, that could impose significant burdens on, or otherwise
materially delay, the FDA’s ability to engage in routine regulatory and oversight activities such as implementing statutes
through rulemaking, issuance of guidance, and review and approval of marketing applications. An under-staffed FDA could
result in delays in the FDA’s responsiveness or in its ability to review submissions or applications, issue regulations or
guidance, or implement or enforce regulatory requirements in a timely fashion or at all. Moreover, on January 30, 2017,
President Trump issued an Executive Order, applicable to all executive agencies, including the FDA, which requires that
for each notice of proposed rulemaking or final regulation to be issued in fiscal year 2017, the agency shall identify at least
two existing regulations to be repealed, unless prohibited by law. These requirements are referred to as the “two-for-one”
provisions. This Executive Order includes a budget neutrality provision that requires the total incremental cost of all new
regulations in the 2017 fiscal year, including repealed regulations, to be no greater than zero, except in limited
circumstances. For fiscal years 2018 and beyond, the Executive Order requires agencies to identify regulations to offset any
incremental cost of a new regulation and approximate the total costs or savings associated with each new regulation or
repealed regulation. In interim guidance issued by the Office of Information and Regulatory Affairs within OMB on
February 2, 2017, the administration indicates that the “two-for-one” provisions may apply not only to agency regulations,
but also to significant agency guidance documents. In addition, on February 24, 2017, President Trump issued an executive
order directing each affected agency to designate an agency official as a “Regulatory Reform Officer” and establish a
“Regulatory Reform Task Force” to implement the two-for-one provisions and other previously issued executive orders
relating to the review of federal regulations, however it is difficult to predict how these requirements will be implemented,
and the extent to which they will impact the FDA’s ability to exercise its regulatory authority. If these executive actions
impose constraints on the FDA’s ability to engage in oversight and implementation activities in the normal course, our
business may be negatively impacted.

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We may not be able to obtain or maintain orphan drug exclusivity for applications of our TLR drug candidates.

Regulatory authorities in some jurisdictions, including the United States and Europe, may designate drugs for
relatively small patient populations as orphan drugs. Under the Orphan Drug Act, the FDA may designate a product as an
orphan drug if it is a drug intended to treat a rare disease or condition, which is generally defined as a patient population of
fewer than 200,000 individuals in the United States.

Generally, if a product with an orphan drug designation subsequently receives the first marketing approval for the
indication for which it has such designation, the product is entitled to a period of marketing exclusivity, which precludes
the European Medicines Agency, or EMA, or the FDA from approving another marketing application for the same drug for
the same indication for that exclusivity period. The applicable period is seven years in the United States and ten years in
Europe. The European exclusivity period can be reduced to six years if a drug no longer meets the criteria for orphan drug
designation or if the drug is sufficiently profitable such that market exclusivity is no longer justified. Orphan drug
exclusivity may be lost if the FDA or EMA determines that the request for designation was materially defective or if the
manufacturer is unable to assure sufficient quantity of the drug to meet the needs of patients with the rare disease or
condition.

In June 2017, the FDA granted us orphan drug designation for tilsotolimod for the treatment of melanoma Stages IIb

to IV. However, there can be no assurance that we will obtain orphan drug designation or exclusivity for any other disease
indications for which we develop tilsotolimod, or for our other drug candidates. Even if we 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, Congress passed the FDA Reauthorization Act of 2017, or FDARA. 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 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.

A  fast  track  designation  by  the  FDA  may  not  actually  lead  to  a  faster  development  or  regulatory  review  or  approval
process, and does not increase the likelihood that drug candidates will receive marketing approval.

We intend to seek fast track designation for some applications of our drug candidates. If a drug is intended for the

treatment of a serious or life-threatening condition and the drug demonstrates the potential to address unmet medical needs
for this condition, the drug sponsor may apply for FDA fast track designation. The FDA has broad discretion whether or
not to grant this designation, so even if we believe a particular drug candidate is eligible for this designation, we cannot
assure you that the FDA would decide to grant it.

In November 2017, the FDA granted us fast track designation for tilsotolimod for the treatment of anti-PD1
refractory metastatic melanoma in combination with ipilimumab therapy.  However, even with fast track designation, we
may not experience a faster development process, review or approval compared to conventional FDA procedures. The FDA
may withdraw fast track designation if it believes that the designation is no longer supported by data from our clinical
development program.

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A  breakthrough  therapy  designation  by  the  FDA  for  any  application  of  our  drug  candidates  may  not  lead  to  a  faster
development or regulatory review or approval process, and it does not increase the likelihood that those drug candidates
will receive marketing approval.

We may seek a breakthrough therapy designation for some applications of our drug candidates. 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 existing therapies on one or more clinically significant endpoints, such as substantial treatment effects
observed early in clinical development. For drugs and biologics 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.

Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe an
application of one of our drug candidates 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 a breakthrough therapy
designation for a drug candidate 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 one or more of our drug candidates qualify as breakthrough therapies, the FDA may later decide that the
products no longer meet the conditions for qualification or decide that the time period for FDA review or approval will not
be shortened.

If we are required by the FDA to obtain approval of a companion diagnostic in connection with and as a condition to
approval of a drug candidate, and we do not obtain or we experience delays in obtaining FDA approval of a diagnostic
device, we will not be able to commercialize the drug candidate and our ability to generate revenue will be materially
impaired.

According to FDA guidance, if the FDA determines that a companion diagnostic device is essential to the safe and

effective use of a novel therapeutic product or indication, the FDA generally will not approve the therapeutic product or
new therapeutic product indication if the companion diagnostic is not also approved or cleared for that indication. Under
the Federal Food, Drug, and Cosmetic Act, companion diagnostics are regulated as medical devices and the FDA has
generally required companion diagnostics intended to select the patients who will respond to cancer treatment to obtain
Premarket Approval, or a PMA. The PMA process, including the gathering of clinical and preclinical data and the
submission to and review by the FDA, involves a rigorous premarket review during which the applicant must prepare and
provide the FDA with reasonable assurance of the device's safety and effectiveness and information about the device and
its components regarding, among other things, device design, manufacturing and labeling. PMA approval is not guaranteed
and may take considerable time, and the FDA may ultimately respond to a PMA submission with a not approvable
determination based on deficiencies in the application and require additional clinical trial or other data that may be
expensive and time-consuming to generate and that can substantially delay approval.

We do not have experience or capabilities in developing or commercializing diagnostics and plan to rely on third

parties or collaborators to perform these functions. Companion diagnostics are subject to regulation by the FDA and similar
regulatory authorities outside the United States as medical devices and require separate regulatory approval prior to
commercialization.

If we, or any third parties that we engage to assist us or any of our collaborators, are unable to successfully develop

companion diagnostics for our TLR antagonist drug candidates that require a companion diagnostic, or experience delays in
doing so:

·

·

the  development  of  such  TLR  antagonist  drug  candidates  may  be  adversely  affected  if  we  are  unable  to
appropriately select patients for enrollment in our clinical trials;

such TLR antagonist drug candidates may not receive marketing approval if their safe and effective use depends
on a companion diagnostic; and

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·

we may not realize the full commercial potential of any TLR antagonist drug candidate that receives marketing
approval if, among other reasons, we are unable to appropriately identify patients with the specific oncogenic
mutation targeted by such TLR antagonist drug candidate.

If any of these events were to occur, our business would be harmed, possibly materially.

We  have  only  limited  experience  in  regulatory  affairs  and  our  drug  candidates  are  based  on  new  technologies;  these
factors may affect our ability or the time we require to obtain necessary regulatory approvals.

We have only limited experience in filing the applications necessary to obtain regulatory approvals. Moreover, the

products that result from our research and development programs will likely be based on new technologies and new
therapeutic approaches that have not been extensively tested in humans. The regulatory requirements governing these types
of products may be more rigorous than for conventional drugs. As a result, we may experience a longer regulatory process
in connection with obtaining regulatory approvals of any product that we develop.

We may experience difficulties and delays in manufacturing certain of our drug candidates.

We may, in the future, experience difficulties and delays inherent in manufacturing our products, such as (i) failure

by us or any of our vendors or suppliers to comply with Current Good Manufacturing Practices and other applicable
regulations and quality assurance guidelines that could lead to manufacturing shutdowns, product shortages and delays in
product manufacturing; (ii) delays related to the construction of new facilities or the expansion of existing facilities,
including those intended to support future demand for our products; and (iii) other manufacturing or distribution problems
including changes in manufacturing production sites and limits to manufacturing capacity due to regulatory requirements,
changes in types of products produced, or physical limitations that could impact continuous supply. In addition, we could
experience difficulties or delays in manufacturing our products caused by natural disasters, such as hurricanes.
Manufacturing difficulties can result in product shortages, leading to lost sales and reputational harm to us.

Our  relationships  with  healthcare  providers  and  physicians  and  third-party  payors  will  be  subject  to  applicable  anti-
kickback, fraud and abuse and other healthcare laws and regulations, which could expose us to criminal sanctions, civil
penalties, contractual damages, reputational harm and diminished profits and future earnings.

Healthcare providers, physicians and third party payors will play a primary role in the recommendation and

prescription of any drugs for which we obtain marketing approval. Our future arrangements with third party payors,
healthcare providers and physicians may expose us to broadly applicable fraud and abuse and other healthcare laws and
regulations that may constrain the business or financial arrangements and relationships through which we market, sell and
distribute any drugs for which we obtain marketing approval. These include the following:

·

·

·

Anti-Kickback Statute—the federal healthcare anti-kickback statute prohibits, among other things, persons from
knowingly and willfully soliciting, offering, receiving or providing remuneration, directly or indirectly, in cash
or in kind, to induce or reward, or in return for, either the referral of an individual for, or the purchase, order or
recommendation or arranging of, any good or service, for which payment may be made under a federal
healthcare program such as Medicare and Medicaid;

False Claims Act—the federal False Claims Act imposes criminal and civil penalties, including through civil
whistleblower or qui tam actions, against individuals or entities for, among other things, knowingly presenting,
or causing to be presented false or fraudulent claims for payment by a federal healthcare program or making a
false statement or record material to payment of a false claim or avoiding, decreasing or concealing an
obligation to pay money to the federal government, with potential liability including mandatory treble damages
and significant per-claim penalties, currently set at $5,500 to $11,000 per false claim;

Privacy laws such as HIPAA—the federal Health Insurance Portability and Accountability Act of 1996, or
HIPAA, imposes criminal and civil liability for executing a scheme to defraud any healthcare benefit program
or making false statements relating to healthcare matters, and, as amended by the Health Information
Technology for Economic and Clinical Health Act and its implementing regulations, also imposes obligations,
including mandatory contractual terms and technical safeguards, with respect to maintaining the privacy,
security and transmission of individually identifiable health information;

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·

·

Transparency Requirements—federal laws require applicable manufacturers of covered drugs to report
payments and other transfers of value to physicians and teaching hospitals; and

Analogous State and Foreign Laws—analogous state and foreign fraud and abuse laws and regulations, such as
state anti-kickback and false claims laws, can apply to sales or marketing arrangements and claims involving
healthcare items or services and are generally broad and are enforced by many different federal and state
agencies as well as through private actions.

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 and require drug
manufacturers to report information related to payments and other transfers of value to physicians and other healthcare
providers or marketing expenditures. State and foreign laws also govern the privacy and security of health information in
some circumstances, many of which differ from each other in significant ways and often are not pre-empted by HIPAA,
thus complicating compliance efforts.

Efforts to ensure that our business arrangements with third parties will comply with applicable healthcare laws and

regulations will involve substantial costs. It is possible that governmental authorities will conclude that our business
practices may not comply with current or future statutes, regulations or case law involving applicable fraud and abuse or
other healthcare laws and regulations. If our operations are found to be in violation of any of these laws or any other
governmental regulations that may apply to us, we may be subject to significant civil, criminal and administrative penalties,
damages, fines, imprisonment, exclusion of products from government funded healthcare programs, such as Medicare and
Medicaid, and the curtailment or restructuring of our operations. If any of the physicians or other healthcare providers or
entities with whom we expect to do business is found to be not in compliance with applicable laws, they may be subject to
criminal, civil or administrative sanctions, including exclusions from government funded healthcare programs.

Current  and  future  legislation  may  increase  the  difficulty  and  cost  for  us  and  any  collaborators  to  obtain  marketing
approval of our drug candidates and may affect the prices we, or they, may obtain.

In the United States and some foreign jurisdictions, there have been a number of legislative and regulatory changes

and proposed changes regarding the healthcare system that could, among other things, prevent or delay marketing approval
of our drug candidates, restrict or regulate post-approval activities and affect our ability, or the ability of any collaborators,
to profitably sell any products for which we, or they, obtain marketing approval. We expect that current laws, as well as
other healthcare reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in
additional downward pressure on the price that we, or any collaborators, may receive for any approved products.

For example, in March 2010, President Obama signed into law the Patient Protection and Affordable Care Act, as
amended by the Health Care and Education Reconciliation Act, or collectively the PPACA. Among the provisions of the
PPACA of potential importance to our business and our drug candidates are the following:

·

·

·

·

·

·

·

·

an annual, non-deductible fee on any entity that manufactures or imports specified branded prescription drugs
and biologic agents;

an increase in the statutory minimum rebates a manufacturer must pay under the Medicaid Drug Rebate
Program;

expansion of healthcare fraud and abuse laws, including the civil False Claims Act and the federal Anti-
Kickback Statute, new government investigative powers and enhanced penalties for noncompliance;

a Medicare Part D coverage gap discount program, in which manufacturers must agree to offer point-of-sale
discounts off negotiated prices;

extension of manufacturers’ Medicaid rebate liability;

expansion of eligibility criteria for Medicaid programs;

expansion of the entities eligible for discounts under the Public Health Service pharmaceutical pricing program;

new requirements to report certain financial arrangements with physicians and teaching hospitals;

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·

·

a new requirement to annually report drug samples that manufacturers and distributors provide to physicians;
and

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

In addition, other legislative changes have been proposed and adopted since the PPACA was enacted. These changes

include the Budget Control Act of 2011, which, among other things, led to aggregate reductions to Medicare payments to
providers of up to 2% per fiscal year that started in 2013 and, due to subsequent legislative amendments to the statute, will
stay in effect through 2025 unless additional congressional action is taken, and the American Taxpayer Relief Act of 2012,
which, among other things, reduced Medicare payments to several types of providers and increased the statute of
limitations period for the government to recover overpayments to providers from three to five years. These new laws may
result in additional reductions in Medicare and other healthcare funding and otherwise affect the prices we may obtain for
any of our drug candidates for which we may obtain regulatory approval or the frequency with which any such drug
candidate is prescribed or used. Further, there have been several recent U.S. congressional inquiries and proposed state and
federal legislation designed to, among other things, bring more transparency to drug pricing, review the relationship
between pricing and manufacturer patient programs, reduce the costs of drugs under Medicare and reform government
program reimbursement methodologies for drug products.

We expect that these healthcare reforms, as well as other healthcare reform measures that may be adopted in the

future, may result in additional reductions in Medicare and other healthcare funding, more rigorous coverage criteria, new
payment methodologies and additional downward pressure on the price that we receive for any approved product and/or the
level of reimbursement physicians receive for administering any approved product we might bring to market. Reductions in
reimbursement levels may negatively impact the prices we receive or the frequency with which our products are prescribed
or administered.  Any reduction in reimbursement from Medicare or other government programs may result in a similar
reduction in payments from private payors. 

The Trump Administration has also taken a number of executive actions to repeal or delay implementation of the

PPACA. Most recently, the Tax Cuts and Jobs Act of 2017 repealed the “individual mandate.”  The repeal of this provision,
which requires most Americans to carry a minimal level of health insurance, became effective in 2019.  According to the
Congressional Budget Office, the repeal of the individual mandate will cause 13 million fewer Americans to be insured in
2027 and premiums in insurance markets may rise. 

We will continue to evaluate the effect that the PPACA and its possible repeal and replacement could have on our

business.  It is possible that repeal and replacement initiatives, if enacted into law, could ultimately result in fewer
individuals having health insurance coverage or in individuals having insurance coverage with less generous
benefits.  While the timing and scope of any potential future legislation to repeal and replace PPACA provisions is highly
uncertain in many respects, it is also possible that some of the PPACA provisions that generally are not favorable for the
research-based pharmaceutical industry could also be repealed along with PPACA coverage expansion provisions
Accordingly, such reforms, if enacted, could have an adverse effect on anticipated revenue from drug candidates that we
may successfully develop and for which we may obtain marketing approval and may affect our overall financial condition
and ability to develop commercialize drug candidates. 

The costs of prescription pharmaceuticals in the United States has also been the subject of considerable discussion in

the United States, and members of Congress and the Administration have stated that they will address such costs through
new legislative and administrative measures.  The pricing of prescription pharmaceuticals is also subject to governmental
control outside the United States.  In these countries, pricing negotiations with governmental authorities can take
considerable time after the receipt of marketing approval for a product. To obtain reimbursement or pricing approval in
some countries, we may be required to conduct a clinical trial that compares the cost effectiveness of our drug candidates to
other available therapies. If reimbursement of our products is unavailable or limited in scope or amount, or if pricing is set
at unsatisfactory levels, our ability to generate revenues and become profitable could be impaired.  In the European Union,
similar political, economic and regulatory developments may affect our ability to profitably commercialize our products. In
addition to continuing pressure on prices and cost containment measures, legislative developments at the European Union
or member state level may result in significant additional requirements or obstacles that may increase our operating costs.

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Moreover, legislative and regulatory proposals have also been made to expand post-approval requirements and
restrict sales and promotional activities for pharmaceutical drugs. We cannot be sure whether additional legislative changes
will be enacted, or whether the FDA regulations, guidance or interpretations will be changed, or what the impact of such
changes on the marketing approvals of our drug candidates, if any, may be. In addition, increased scrutiny by Congress of
the FDA’s approval process may significantly delay or prevent marketing approval, as well as subject us and any future
collaborators to more stringent drug labeling and post-marketing testing and other requirements.

Laws  and  regulations  governing  any  international  operations  we  may  have  in  the  future  may  preclude  us  from
developing, manufacturing and selling certain drug candidates outside of the United States and require us to develop
and implement costly compliance programs.

We are subject to numerous laws and regulations in each jurisdiction outside the United States in which we operate.
The creation, implementation and maintenance of international business practices compliance programs is costly and such
programs are difficult to enforce, particularly where reliance on third parties is required.

The FCPA prohibits any U.S. individual or business from paying, offering, authorizing payment or offering of

anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose of influencing
any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The
FCPA also obligates companies whose securities are listed in the United States to comply with certain accounting
provisions requiring the company to maintain books and records that accurately and fairly reflect all transactions of the
corporation, including international subsidiaries, and to devise and maintain an adequate system of internal accounting
controls for international operations. The anti-bribery provisions of the FCPA are enforced primarily by the DOJ. The SEC
is involved with enforcement of the books and records provisions of the FCPA.

Compliance with the FCPA and other anti-bribery laws is expensive and difficult, particularly in countries in which

corruption is a recognized problem. In addition, the FCPA presents particular challenges in the pharmaceutical industry,
because, in many countries, hospitals are operated by the government, and doctors and other hospital employees are
considered foreign officials. Certain payments to hospitals in connection with clinical trials and other work have been
deemed to be improper payments to government officials and have led to FCPA enforcement actions.

Various laws, regulations and executive orders also restrict the use and dissemination outside of the United States, or

the sharing with certain non-U.S. nationals, of information classified for national security purposes, as well as certain
products and technical data relating to those products. Our expansion outside of the United States, has required, and will
continue to require, us to dedicate additional resources to comply with these laws, and these laws may preclude us from
developing, manufacturing, or selling certain drugs and drug candidates outside of the United States, which could limit our
growth potential and increase our development costs. The failure to comply with laws governing international business
practices may result in substantial penalties, including suspension or debarment from government contracting. Violation of
the FCPA and other anti-bribery laws can result in significant civil and criminal penalties. Indictment alone under the FCPA
can lead to suspension of the right to do business with the U.S. government until the pending claims are resolved.
Conviction of a violation of the FCPA can result in long-term disqualification as a government contractor. The termination
of a government contract or relationship as a result of our failure to satisfy any of our obligations under laws governing
international business practices would have a negative impact on our operations and harm our reputation and ability to
procure government contracts. The SEC also may suspend or bar issuers from trading securities on U.S. exchanges for
violations of the FCPA’s accounting provisions.

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Governments outside of the United States tend to impose strict price controls, which may adversely affect our revenues
from the sales of drugs, if any.

In some countries, particularly the countries of the European Union, the pricing of prescription pharmaceuticals is

subject to governmental control. In these countries, pricing negotiations with governmental authorities can take
considerable time after the receipt of marketing approval for a drug. To obtain reimbursement or pricing approval in some
countries, we, or our future collaborators, may be required to conduct a clinical trial that compares the cost-effectiveness of
our drug to other available therapies. If reimbursement of our drugs is unavailable or limited in scope or amount, or if
pricing is set at unsatisfactory levels, our business could be materially harmed.

If we fail to comply with environmental, health and safety laws and regulations, we could become subject to fines or
penalties or incur costs that could have a material adverse effect on our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing
laboratory procedures and the handling, use, storage, treatment and disposal of hazardous materials and wastes. Our
operations involve the use of hazardous and flammable materials, including chemicals and biological and radioactive
materials. Our operations also produce hazardous waste products. We generally contract with third parties for the disposal
of these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of
contamination or injury resulting from our use of hazardous materials, we could be held liable for any resulting damages,
and any liability could exceed our resources. We also could incur significant costs associated with civil or criminal fines
and penalties.

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 hazardous 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, hazardous or radioactive materials.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and

safety laws and regulations. These current or future laws and regulations may impair our research, development or
commercialization efforts. Failure to comply with these laws and regulations also may result in substantial fines, penalties
or other sanctions.

Our  employees  may  engage  in  misconduct  or  other  improper  activities,  including  non-compliance  with  regulatory
standards and requirements, which could cause significant liability for us and harm our reputation.

We are exposed to the risk of employee fraud or other misconduct, including intentional failures to comply with

FDA regulations or similar regulations of comparable foreign regulatory authorities, provide accurate information to the
FDA or comparable foreign regulatory authorities, comply with manufacturing standards we have established, comply with
federal and state healthcare fraud and abuse laws and regulations and similar laws and regulations established and enforced
by comparable foreign regulatory authorities, report financial information or data accurately or disclose unauthorized
activities to us. Employee misconduct could also involve the improper use of information obtained in the course of clinical
trials, which could result in regulatory sanctions and serious harm to our reputation. It is not always possible to identify and
deter employee misconduct, and the 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, standards or regulations. 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 and results of operations, including the imposition of significant fines or other sanctions.

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We  depend  on  information  technology,  infrastructure  and  data  to  conduct  our  business.  Any  significant  disruption
could have a material adverse effect on our business.

We are dependent upon information technology, infrastructure and data. Computer systems, including ours and those

of our suppliers, partners and service providers, contain sensitive confidential information or intellectual
property.  Computer systems are vulnerable to service interruption or destruction, cyber-attacks (both malicious and
random) and other natural or man-made incidents or disasters, which may be prolonged or go undetected.  Such events and
attacks are increasing in their frequency, sophistication and intensity, and have become increasingly difficult to detect. A
significant or large-scale interruption of our information technology could adversely affect our ability to manage and keep
our operations running efficiently and effectively. An incident that results in a wider or sustained disruption to our business
or products could have a material adverse effect on our business, financial condition and results of operations.

Likewise, data privacy or security breaches by employees or others may pose a risk that sensitive data, including our

intellectual property, trade secrets or personal information of our employees, patients or other business partners may be
exposed to unauthorized persons or to the public. There can be no assurance that our efforts, or the efforts of our partners
and vendors, will prevent service interruptions, or identify breaches in our systems, that could adversely affect our business
and operations and/or result in the loss of critical or sensitive information, which could result in financial, legal, business or
reputational harm to us. In addition, our liability insurance may not be sufficient in type or amount to cover us against
claims related to security breaches, cyberattacks and other related breaches.

Risks Relating to Collaborators

Our existing collaborations and any collaborations we enter into in the future may not be successful.

Historically, an important element of our business strategy has included entering into collaborative alliances with

corporate collaborators, primarily large pharmaceutical companies, for the development, commercialization, marketing, and
distribution of some of our drug candidates. Our current collaboration and/or license agreements, as more fully described
within Item 1 of this Annual Report on Form 10-K, or any collaborations we may enter into in the future, may not be
successful. The success of our collaborative alliances, if any, will depend heavily on the efforts and activities of our
collaborators. Our existing collaborations and any potential future collaborations have risks, including the following:

·

·

·

·

·

·

·

·

·

our collaborators may control the development of the drug candidates being developed with our technologies
and compounds including the timing of development;

our collaborators may control the development of the companion diagnostic to be developed for use in
conjunction with our drug candidates including the timing of development;

our collaborators may control the public release of information regarding the developments, and we may not be
able to make announcements or data presentations on a schedule favorable to us;

disputes may arise in the future with respect to the ownership of or right to use technology and intellectual
property developed with our collaborators;

disagreements with our collaborators could delay or terminate the research, development or commercialization
of products, or result in litigation or arbitration;

we may have difficulty enforcing the contracts if any of our collaborators fail to perform;

our collaborators may terminate their collaborations with us, which could make it difficult for us to attract new
collaborators or adversely affect the perception of us in the business or financial communities;

our collaboration agreements are likely to be for fixed terms and subject to termination by our collaborators in
the event of a material breach or lack of scientific progress by us;

our collaborators may have the first right to maintain or defend our intellectual property rights and, although we
would likely have the right to assume the maintenance and defense of our intellectual

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property rights if our collaborators do not, our ability to do so may be compromised by our collaborators' acts or
omissions;

our collaborators may challenge our intellectual property rights or utilize our intellectual property rights in such
a way as to invite litigation that could jeopardize or invalidate our intellectual property rights or expose us to
potential liability;

our collaborators may not comply with all applicable regulatory requirements, or may fail to report safety data
in accordance with all applicable regulatory requirements;

our collaborators may change the focus of their development and commercialization efforts. Pharmaceutical and
biotechnology companies historically have re-evaluated their priorities following mergers and consolidations,
which have been common in recent years in these industries. The ability of our drug candidates to reach their
potential could be limited if our collaborators decrease or fail to increase spending relating to such drug
candidates;

our collaborators may under fund or not commit sufficient resources to the testing, marketing, distribution or
development of our drug candidates; and

our collaborators may develop alternative products either on their own or in collaboration with others, or
encounter conflicts of interest or changes in business strategy or other business issues, which could adversely
affect their willingness or ability to fulfill their obligations to us.

·

·

·

·

·

Given these risks, it is possible that any collaborative alliance into which we enter may not be successful.

Collaborations with pharmaceutical companies and other third parties often are terminated or allowed to expire by the other
party. For example, in March 2019, we mutually agreed to terminate the Vivelix Agreement. Additionally, in November
2019, the collaboration term of the GSK Agreement expired. The termination or expiration of our current collaboration
agreements or any other collaboration agreement that we enter into in the future may adversely affect us financially and
could harm our business reputation.  

If we are unable to establish additional collaborative alliances, our business may be materially harmed.

Collaborators provide the necessary resources and drug development experience to advance our compounds in their

programs. We have entered into and expect to continue to seek to enter into collaborative alliances with pharmaceutical
companies to advance our TLR agonist and antagonist candidates and with respect to additional applications of our nucleic
acid chemistry technology research program. Upfront payments and milestone payments received from collaborations help
to provide us with the financial resources for our internal research and development programs. Our internal programs are
focused on developing TLR-targeted drug candidates for the potential treatment of certain rare diseases and in our immuno-
oncology program and on nucleic acid chemistry drug candidates. We believe that additional resources will be required to
advance compounds in all of these areas. If we do not reach agreements with additional collaborators in the future, we may
not be able to obtain the expertise and resources necessary to achieve our business objectives, our ability to advance our
compounds will be jeopardized and we may fail to meet our business objectives.

We may have difficulty establishing additional collaborative alliances, particularly with respect to our TLR-targeted

drug candidates and technology. For example, potential collaborators may note that our prior TLR collaborations with
Vivelix, Novartis and with Merck KGaA have been terminated. Potential collaborators may also be reluctant to establish
collaborations with respect to tilsotolimod (IMO-2125) or IMO-9200, given our prior setbacks with respect to these drug
candidates. We also face, and expect to continue to face, significant competition in seeking appropriate collaborators. 

Even if a potential partner were willing to enter into a collaborative alliance with respect to our TLR-targeted
compounds or technology or our nucleic acid chemistry technology, the terms of such a collaborative alliance may not be
on terms that are favorable to us. Moreover, collaborations are complex and time consuming to negotiate, document, and
implement. We may not be successful in our efforts to establish and implement collaborations on a timely basis.

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Risks Relating to Intellectual Property

If we are unable to obtain and maintain patent protection for our discoveries, the value of our technology and products
will be adversely affected.

Our patent positions, and those of other drug discovery companies, are generally uncertain and involve complex

legal, scientific, and factual questions. Our ability to develop and commercialize drugs depends in significant part on our
ability to:

·

·

·

·

·

obtain and maintain valid and enforceable patents;

obtain licenses to the proprietary rights of others on commercially reasonable terms;

operate without infringing upon the proprietary rights of others;

prevent others from infringing on our proprietary rights; and

protect our trade secrets.

We do not know whether any of our currently pending patent applications or those patent applications that we

license will result in the issuance of any patents. Our issued patents and those that may be issued in the future, or those
licensed to us, may be challenged, invalidated, held unenforceable, narrowed in the course of a post-issuance proceeding or
circumvented, and the rights granted thereunder may not provide us proprietary protection or competitive advantages
against competitors with similar technology. Moreover, intellectual property laws may change and negatively impact our
ability to obtain issued patents covering our technologies or to enforce any patents that issue. Because of the extensive time
required for development, testing, and regulatory review of a potential product, it is possible that, before any of our
products can be commercialized, any related patent may expire or remain in force for only a short period following
commercialization, thus reducing any advantage provided by the patent.

Because patent applications in the United States and many foreign jurisdictions are typically not published until 18
months after filing, or in some cases not at all, and because publications of discoveries in the scientific literature often lag
behind actual discoveries, neither we nor our licensors can be certain that we or they were the first to make the inventions
claimed in issued patents or pending patent applications, or that we or they were the first to file for protection of the
inventions set forth in these patent applications.

As of February 15, 2020, we owned approximately 53 U.S. patents and patent applications and approximately 184

patents and patent applications throughout the rest of the world for our TLR-targeted immune modulation technologies.
These patents and patent applications include claims covering the chemical compositions of matter and methods of use of
our IMO compounds, such as IMO-8400, IMO-9200 and tilsotolimod (IMO-2125), as well as other compounds. These
patents and patent applications (if granted) expire at various dates ranging from 2020 to 2037. With respect to IMO-8400,
we have six issued U.S. patents that cover the chemical composition of matter of IMO-8400 and certain methods of its use,
the latest of which will expire in 2031. With respect to IMO-9200, we have nine issued U.S. patents that cover the chemical
composition for IMO-9200 and methods of its use, the latest of which will expire in 2034. With respect to tilsotolimod, we
have an issued U.S. patent that covers the chemical composition of matter of tilsotolimod that expires in 2024 and
additional patents covering methods of its use, the latest of which will expire in 2037. We have pending applications in the
United States and outside of the United States that cover methods of treatment or use of tilsotolimod, which, if granted, will
expire between 2035 and 2039.

Third parties may own or control patents or patent applications and require us to seek licenses, which could increase
our development and commercialization costs, or prevent us from developing or marketing products.

Although we have many issued patents and pending patent applications in the United States and other countries, we
may not have rights under certain third-party patents or patent applications related to our compounds under development.
Third parties may own or control these patents and patent applications in the United States and abroad. In particular, we are
aware of certain third-party U.S. patents that contain claims related to immunostimulatory polynucleotides and their use to
stimulate an immune response, as well as to antisense technology. Although we do not believe any of our TLR or antisense
compounds under development infringe any valid claim of these patents, we cannot be assured that the holder of such
patents would not seek to assert such

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patents against us or, if the holder did, that the courts would not interpret the claims of such patents more broadly than we
believe appropriate and determine that we are in infringement of such patents. In addition, there may be other patents and
patent applications related to our current or future drug candidates of which we are not aware. Therefore, in some cases, in
order to develop, manufacture, sell or import some of our drug candidates, we or our collaborators may choose to seek, or
be required to seek, licenses under third-party patents issued in the United States and abroad or under third-party patents
that might issue from U.S. and foreign patent applications. In such an event, we would be required to pay license fees or
royalties or both to the licensor. If licenses are not available to us on acceptable terms, we or our collaborators may not be
able to develop, manufacture, sell or import these products, or may be delayed in doing so. Either of these results could
have a material adverse effect on our business.

We  may  become  involved  in  expensive  patent  litigation  or  other  proceedings,  which  could  result  in  our  incurring
substantial  costs  and  expenses  or  substantial  liability  for  damages,  require  us  to  stop  our  development  and
commercialization efforts or result in our patents being invalidated, interpreted narrowly or limited.

There has been substantial litigation and other proceedings regarding patent and other intellectual property rights in

the biotechnology industry. We may become a party to various types of patent litigation or other proceedings regarding
intellectual property rights from time to time even under circumstances where we are not practicing and do not intend to
practice any of the intellectual property involved in the proceedings.

In addition to litigation, we may become involved in patent office proceedings, including oppositions,

reexaminations, supplemental examinations and inter partes reviews involving our patents or the patents of third parties.
We may initiate such proceedings or have such proceedings brought against us. An adverse determination in any such
proceeding, or in litigation, could reduce the scope of, or invalidate, our patent rights, allow third parties to commercialize
our technology or products and compete directly with us, without payment to us, or result in our inability to manufacture or
commercialize products without infringing third-party patent rights. In addition, if the breadth or strength of protection
provided by our patents and patent applications is threatened, it could dissuade companies from collaborating with us to
license, develop or commercialize current or future drug candidates. An adverse determination in a proceeding involving a
patent in our portfolio could result in the loss of protection or a narrowing in the scope of protection provided by that
patent.

The cost to us of any patent litigation or other proceeding, even if resolved in our favor, could be substantial. Some

of our competitors may be able to sustain the cost of such litigation or proceedings more effectively than we can because of
their substantially greater financial resources. If any patent litigation or other proceeding is resolved against us, we or our
collaborators may be enjoined from developing, manufacturing, selling or importing our drugs without a license from the
other party and we may be held liable for significant damages. We may not be able to obtain any required license on
commercially acceptable terms or at all. In a patent office proceeding, such as an opposition, reexamination or inter partes
review, our patents may be narrowed or invalidated.

Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could have a

material adverse effect on our ability to compete in the marketplace. Patent litigation and other proceedings may also
absorb significant management time.

Our intellectual property may be infringed by a third party.

Third parties may infringe one or more of our issued patents or trademarks. We cannot predict if, when or where a
third party may infringe one or more of our issued patents or trademarks. To counter infringement, we may be required to
file infringement claims, which can be expensive and time-consuming. Moreover, there is no assurance that we would be
successful in a court of law in proving that a third party is infringing one or more of our issued patents or trademarks. Any
claims we assert against perceived infringers could also provoke these parties to assert counterclaims against us, alleging
that we infringe their intellectual property. In addition, in a patent infringement proceeding, a court may decide that a patent
of ours is invalid or unenforceable, in whole or in part, construe the patent’s claims narrowly and/or refuse to stop the other
party from using the technology at issue on the grounds that our patents do not cover the technology in question, any of
which may adversely affect our business. Even if we are successful in proving in a court of law that a third party is
infringing one or more of our issued patents or trademarks there can be no assurance that we would be successful in halting
their infringing activities, for example, through a permanent injunction, or that we would be fully or even partially
financially compensated for any harm to our business. We may be forced to enter into a license or other agreement with the

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infringing third party at terms less profitable or otherwise commercially acceptable to us than if the license or agreement
were negotiated under conditions between those of a willing licensee and a willing licensor.

Additionally, we may not become aware of a third-party infringer within legal timeframes for compensation or at all,
thereby possibly losing the ability to be compensated for any harm to our business. Such a third party may be operating in a
foreign country where the infringer is difficult to locate and/or the intellectual property laws may be more difficult to
enforce. Some third-party infringers may be able to sustain the costs of complex infringement litigation more effectively
than we can because they have substantially greater resources. Any inability to stop third-party infringement could result in
loss in market share of some of our products or even lead to a delay, reduction and/or inhibition of the development,
manufacture or sale of certain products by us. There is no assurance that a product produced and sold by a third-party
infringer would meet our or other regulatory standards or would be safe for use. Such third‑party infringer products could
irreparably harm the reputation of our products thereby resulting in substantial loss in market share and profits.

We may be subject to claims that our employees, consultants or independent contractors have wrongfully used or
disclosed confidential information of third parties.

We employ individuals who were previously employed at other biotechnology or pharmaceutical companies. We

may be subject to claims that the we or our employees, consultants or independent contractors have inadvertently or
otherwise used or disclosed confidential information of our employees’ former employers or other third parties. We may
also be subject to claims that former employers or other third parties have an ownership interest in our patents. Litigation
may be necessary to defend against these claims. There is no guarantee of success in defending these claims, and if we do
not prevail, we could be required to pay substantial damages and could lose rights to important intellectual property. Even
if we are successful, litigation could result in substantial cost and be a distraction to our management and other employees.

Risks Relating to Product Manufacturing, Marketing and Sales, and Reliance on Third Parties

Because  we  have  limited  manufacturing  experience,  and  no  manufacturing  facilities  or  infrastructure,  we  are
dependent  on  third-party  manufacturers  to  manufacture  drug  candidates  for  us.  If  we  cannot  rely  on  third-party
manufacturers,  we  will  be  required  to  incur  significant  costs  and  devote  significant  efforts  to  establish  our  own
manufacturing facilities and capabilities.

We have limited manufacturing experience and no manufacturing facilities, infrastructure or clinical or commercial
scale manufacturing capabilities. In order to continue to develop our drug candidates, apply for regulatory approvals, and
ultimately commercialize products, we need to develop, contract for or otherwise arrange for the necessary manufacturing
capabilities.

We currently rely upon third parties to produce material for nonclinical and clinical testing purposes and expect to
continue to do so in the future. We also expect to rely upon third parties to produce materials that may be required for the
commercial production of our drug candidates, if approved. Our current and anticipated future dependence upon others for
the manufacture of our drug candidates may adversely affect our future profit margins and our ability to develop drug
candidates and commercialize any drug candidates on a timely and competitive basis. We currently do not have any long-
term supply contracts.

There are a limited number of manufacturers that operate under the FDA's cGMP regulations capable of

manufacturing our drug candidates. As a result, we may have difficulty finding manufacturers for our drug candidates with
adequate capacity for our needs. If we are unable to arrange for third-party manufacturing of our drug candidates on a
timely basis, or to do so on commercially reasonable terms, we may not be able to complete development of our drug
candidates or market them.

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Reliance on third-party manufacturers entails risks to which we would not be subject if we manufactured drug

candidates ourselves, including:

·

·

·

·

·

reliance on the third party for regulatory compliance and quality assurance;

the  possibility  of  breach  of  the  manufacturing  agreement  by  the  third  party  because  of  factors  beyond  our
control;

the  possibility  of  termination  or  nonrenewal  of  the  agreement  by  the  third  party,  based  on  its  own  business
priorities or otherwise, at a time that is costly or inconvenient for us;

the  potential  that  third-party  manufacturers  will  develop  know-how  owned  by  such  third  party  in  connection
with the production of our drug candidates that becomes necessary for the manufacture of our drug candidates;
and

reliance  upon  third-party  manufacturers  to  assist  us  in  preventing  inadvertent  disclosure  or  theft  of  our
proprietary knowledge.

Any contract manufacturers with which we enter into manufacturing arrangements will be subject to ongoing
periodic, unannounced inspections by the FDA, or foreign equivalent, and corresponding state and foreign agencies or their
designees to ensure compliance with cGMP requirements and other governmental regulations and corresponding foreign
standards. Any failure by our third-party manufacturers to comply with such requirements, regulations or standards could
lead to a delay in the conduct of our clinical trials, or a delay in, or failure to obtain, regulatory approval of any of our drug
candidates. Such failure could also result in sanctions being imposed, including fines, injunctions, civil penalties, delays,
suspension or withdrawal of approvals, product seizures or recalls, imposition of operating restrictions, total or partial
suspension of production or distribution, or criminal prosecution.

Additionally, contract manufacturers may not be able to manufacture our drug candidates at a cost or in quantities

necessary to make them commercially viable. As of January 1, 2020, our third-party manufacturers have met our
manufacturing requirements, but we cannot be assured that they will continue to do so. Furthermore, changes in the
manufacturing process or procedure, including a change in the location where the drug substance or drug product is
manufactured or a change of a third-party manufacturer, may require prior FDA review and approval in accordance with
the FDA's cGMP and New Drug Application/biologics license application regulations. Contract manufacturers may also be
subject to comparable foreign requirements. This review may be costly and time-consuming and could delay or prevent the
launch of a drug candidate. The FDA or similar foreign regulatory agencies at any time may also implement new standards,
or change their interpretation and enforcement of existing standards for manufacture, packaging or testing of products. If
we or our contract manufacturers are unable to comply, we or they may be subject to regulatory action, civil actions or
penalties.

We have no experience selling, marketing or distributing products and no internal capability to do so.

If we receive regulatory approval to commence commercial sales of any of our drug candidates, we will face
competition with respect to commercial sales, marketing, and distribution. These are areas in which we have no experience.
To market any of our drug candidates directly, we would need to develop a marketing and sales force with technical
expertise and with supporting distribution capability. In particular, we would need to recruit experienced marketing and
sales personnel. Alternatively, we could engage a pharmaceutical or other healthcare company with an existing distribution
system and direct sales force to assist us. However, to the extent we entered into such arrangements, we would be
dependent on the efforts of third parties. If we are unable to establish sales and distribution capabilities, whether internally
or in reliance on third parties, our business would suffer materially.

If third parties on whom we rely for clinical trials do not perform as contractually required or as we expect, we may not
be able to obtain regulatory approval for or commercialize our drug candidates and our business may suffer.

We do not have the ability to independently conduct the clinical trials required to obtain regulatory approval for our

drug candidates. We depend on independent clinical investigators, contract research organizations, and other third-party
service providers in the conduct of the clinical trials of our drug candidates and expect to continue to do so. We expect to
contract with contract research organizations for future clinical trials. We rely heavily on these parties for successful
execution of our clinical trials, but do not control many aspects of their activities. We are responsible for ensuring that each
of our clinical trials is conducted in accordance with the general

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investigational plan and protocols for the trial. Moreover, the FDA and foreign regulatory agencies require us to comply
with certain standards, commonly referred to as good clinical practices, and applicable regulatory requirements, for
conducting, recording, and reporting the results of 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. Third parties may not complete
activities on schedule, or at all, or may not conduct our clinical trials in accordance with regulatory requirements or our
stated protocols. If these third parties fail to carry out their obligations, we may need to enter into new arrangements with
alternative third parties. This could be difficult, costly or impossible, and our preclinical studies or clinical trials may need
to be extended, delayed, terminated or repeated, and we may not be able to obtain regulatory approval in a timely fashion,
or at all, for the applicable drug candidate, or to commercialize such drug candidate being tested in such studies or trials. If
we seek to conduct any of these activities ourselves in the future, we will need to recruit appropriately trained personnel
and add to our research, clinical, quality and corporate infrastructure.

The commercial success of any drug candidates that we may develop will depend upon the degree of market acceptance
by physicians, patients, third-party payors, and others in the medical community.

Any products that we ultimately bring to the market, if they receive marketing approval, may not gain market

acceptance by physicians, patients, third-party payors or others in the medical community. For example, current cancer
treatments like chemotherapy and radiation therapy are well-established in the medical community, and doctors may
continue to rely on these treatments. If our products do not achieve an adequate level of acceptance, we may not generate
product revenue and we may not become profitable. The degree of market acceptance of our products, if approved for
commercial sale, will depend on a number of factors, including:

·

·

·

·

·

·

·

the prevalence and severity of any side effects, including any limitations or warnings contained in the product's
approved labeling;

the efficacy and potential advantages over alternative treatments;

the ability to offer our drug candidates for sale at competitive prices;

relative convenience and ease of administration;

the  willingness  of  the  target  patient  population  to  try  new  therapies  and  of  physicians  to  prescribe  these
therapies;

the  strength  of  marketing  and  distribution  support  and  the  timing  of  market  introduction  of  competitive
products; and

publicity concerning our products or competing products and treatments.

Even if a potential product displays a favorable efficacy and safety profile, market acceptance of the product will not
be known until after it is launched. Our efforts to educate patients, the medical community, and third-party payors on the
benefits of our drug candidates may require significant resources and may never be successful. Such efforts to educate the
marketplace may require more resources than are required by conventional technologies marketed by our competitors.

If we are unable to obtain adequate reimbursement from third-party payors for any products that we may develop or
acceptable prices for those products, our revenues and prospects for profitability will suffer.

Most patients rely on Medicare, Medicaid, private health insurers, and other third-party payors to pay for their

medical needs, including any drugs we may market. If third-party payors do not provide adequate coverage or
reimbursement for any products that we may develop, our revenues and prospects for profitability will suffer. Congress
enacted a limited prescription drug benefit for Medicare recipients in the Medicare Prescription Drug, Improvement, and
Modernization Act of 2003. While the program established by this statute may increase demand for our products if we were
to participate in this program, our prices will be negotiated with drug procurement organizations for Medicare beneficiaries
and are likely to be lower than we might otherwise obtain. Non-Medicare third-party drug procurement organizations may
also base the price they are willing to pay on the rate paid by drug procurement organizations for Medicare beneficiaries or
may otherwise negotiate the price they are willing to pay.

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A primary trend in the United States healthcare industry is toward cost containment. In addition, in some foreign

countries, particularly the countries of the European Union, the pricing of prescription pharmaceuticals is subject to
governmental control. In these countries, pricing negotiations with governmental authorities can take six months or longer
after the receipt of regulatory marketing approval for a product. To obtain reimbursement or pricing approval in some
countries, we may be required to conduct a clinical trial that compares the cost effectiveness of our drug candidates or
products to other available therapies. The conduct of such a clinical trial could be expensive and result in delays in
commercialization of our drug candidates. These further clinical trials would require additional time, resources, and
expenses. If reimbursement of our products is unavailable or limited in scope or amount, or if pricing is set at
unsatisfactory levels, our prospects for generating revenue, if any, could be adversely affected and our business may suffer.

In March 2010, the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation

Act became law. These health care reform laws are intended to broaden access to health insurance; reduce or constrain the
growth of health care spending, especially Medicare spending; enhance remedies against fraud and abuse; add new
transparency requirements for health care and health insurance industries; impose new taxes and fees on certain sectors of
the health industry; and impose additional health policy reforms. Among the new fees is an annual assessment on makers of
branded pharmaceuticals and biologics, under which a company's assessment is based primarily on its share of branded
drug sales to federal health care programs. Such fees could affect our future prospects for profitability. Although it is too
early to determine the effect of the health care legislation on our future prospects for profitability and financial condition,
the law appears likely to continue the pressure on pharmaceutical pricing, especially under the Medicare program, and may
also increase our regulatory burdens and operating costs.

Third-party payors are challenging the prices charged for medical products and services, and many third-party
payors limit reimbursement for newly-approved health care products. These third-party payors may base their coverage and
reimbursement on the coverage and reimbursement rate paid by carriers for Medicare beneficiaries. Furthermore, many
such payors are investigating or implementing methods for reducing health care costs, such as the establishment of
capitated or prospective payment systems. Cost containment pressures have led to an increased emphasis on the use of cost-
effective products by health care providers. In particular, third-party payors may limit the indications for which they will
reimburse patients who use any products that we may develop. Cost control initiatives could limit the price we might
establish for products that we or our current or future collaborators may develop or sell, which would result in lower
product revenues or royalties payable to us.

We face a risk of product liability claims and may not be able to obtain insurance.

Our business exposes us to the risk of product liability claims that is inherent in the manufacturing, testing, and

marketing of human therapeutic drugs. We face an inherent risk of product liability exposure related to the testing of our
drug candidates in human clinical trials and will face an even greater risk if we commercially sell any products. Regardless
of merit or eventual outcome, liability claims and product recalls may result in:

·

·

·

·

·

·

·

·

·

decreased demand for our drug candidates and products;

damage to our reputation;

regulatory investigations that could require costly recalls or product modifications;

withdrawal of clinical trial participants;

costs to defend related litigation;

substantial monetary awards to clinical trial participants or patients, including awards that substantially exceed
our product liability insurance, which we would then have to pay using other sources, if available, and would
damage our ability to obtain liability insurance at reasonable costs, or at all, in the future;

loss of revenue;

the diversion of management's attention away from managing our business; and

the inability to commercialize any products that we may develop.

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Although we have product liability and clinical trial liability insurance that we believe is adequate, this insurance is

subject to deductibles and coverage limitations. We may not be able to obtain or maintain adequate protection against
potential liabilities. If we are unable to obtain insurance at acceptable cost or otherwise protect against potential product
liability claims, we will be exposed to significant liabilities, which may materially and adversely affect our business and
financial position. These liabilities could prevent or interfere with our commercialization efforts.

If we breach our agreements with third parties or if there is a dispute concerning any of our agreements with third
parties, our business could be materially harmed.

Our agreements with third parties impose on us various obligations, as described throughout Item 1 of this Annual

Report on Form 10-K. If we fail to comply with such obligations, or a counterparty to our agreements believes that we have
failed to comply with such obligations, we may be sued and the costs of the resulting litigation could materially harm our
business. Additionally, disputes may arise under these agreements, including with respect to the interpretation of such
agreements and fee redeterminations or renegotiations thereof. These disputes may lead to litigation, termination of the
agreement, or amendments that change our rights under the agreement, which could materially affect our financial position
and materially harm our business.

Risks Relating to Ownership of Our Common Stock

Our corporate governance structure, including provisions in our certificate of incorporation and by-laws and Delaware
law, may prevent a change in control or management that stockholders may consider desirable.

Section 203 of the Delaware General Corporation Law and our certificate of incorporation and by-laws contain

provisions that might enable our management to resist a takeover of our company or discourage a third party from
attempting to take over our company. These provisions include:

·

·

·

·

·

a classified board of directors;

limitations on the removal of directors;

limitations on stockholder proposals at meetings of stockholders;

the inability of stockholders to act by written consent or to call special meetings; and

the ability of our board of directors to designate the terms of and issue new series of preferred stock without
stockholder approval.

In addition, Section 203 of the Delaware General Corporation Law imposes restrictions on our ability to engage in

business combinations and other specified transactions with significant stockholders. These provisions could have the
effect of delaying, deferring or preventing a change in control of us or a change in our management that stockholders may
consider favorable or beneficial. These provisions could also discourage proxy contests and make it more difficult for you
and other stockholders to elect directors and take other corporate actions. These provisions could also limit the price that
investors might be willing to pay in the future for shares of our common stock.

We have three significant securityholders. If these securityholders choose to act together, they could exert substantial
influence over our business. In addition, in connection with any merger, consolidation or sale of all or substantially all
of  our  assets,  they  would  be  entitled  to  receive  consideration  in  excess  of  their  reported  beneficial  ownership  of  our
common stock.

As of February 15, 2020, Baker Bros. Advisors LP, and certain of its affiliated funds (collectively, “Baker Brothers”)

held 4,608,786 shares of our common stock, warrants to purchase up to 2,708,812 shares of our common stock at an
exercise price of $0.08 per share, warrants to purchase 2,368,400 shares of our common stock at an exercise price of $1.52
per share and 23,684 shares of our Series B1 preferred stock convertible into 2,368,400 shares of our common stock. As of
February 15, 2020, Baker Brothers beneficially owned 15.1% of our outstanding common stock, which excludes all
convertible securities as a result of certain beneficial ownership limitations. Under the terms of the warrants issued to Baker
Brothers and the December 2019 Securities Purchase Agreement (as defined below) related to the securities issued in
connection with the 2019 Private Placement, Baker Brothers is not permitted to convert or exercise any common stock
equivalents to the extent that such

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conversion or exercise would result in Baker Brothers (and its affiliates) beneficially owning more than 4.99% of the
number of shares of our common stock outstanding immediately after giving effect to the issuance of shares of common
stock issuable upon conversion or exercise of such securities. Baker Brothers has the right to increase this beneficial
ownership limitation in its discretion on 61 days' prior written notice to us, provided that in no event is Baker Brothers
permitted to convert or exercise such securities to the extent that such exercise would result in Baker Brothers (and its
affiliates) beneficially owning more than 19.99% of the number of shares of our common stock outstanding immediately
after giving effect to the issuance of shares of common stock issuable upon conversion or exercise of such securities. The
information in this paragraph is based on a Schedule 13G filed with the SEC on September 6, 2019 and information
provided to us by Baker Brothers. On February 9, 2015, we entered into a registration rights agreement with Baker
Brothers, pursuant to which we agreed to file registration statements to register for resale the shares of our common stock,
including shares issuable upon the exercise of the warrants, held by Baker Brothers. Additionally, on December 23, 2019,
concurrently with the execution of the December 2019 Securities Purchase Agreement, we entered into a registration rights
agreement with Baker Brothers, pursuant to which we agreed, following demand by Baker Brothers, to file with the SEC a
registration statement on Form S-3 covering the resale of the shares of common stock issuable upon conversion of the
Series B Preferred Stock or exercise of the Series B Warrants (defined below) (as applicable) as promptly as reasonably
practicable following such demand, and in any event within 60 days of such demand.

As of February 15, 2020, entities affiliated with Pillar Invest Corporation (the “Pillar Investment Entities”) held
3,221,317 shares of our common stock, constituting 10.5% of our outstanding common stock, and beneficially owned
10.6% of our outstanding common stock. The information in this paragraph is based on a Schedule 13D/A filed with the
SEC on July 25, 2019, a Form 3 filed with the SEC on August 5, 2019 and Form 4’s filed with the SEC on November 8,
2019 and February 26, 2020.

As of February 15, 2020, Castellina Ventures Ltd. (“Castellina”) held 2,137,638 shares of our common stock,

constituting 7.0% of our outstanding common stock. The information in this paragraph is based on a Schedule 13G filed
with the SEC on September 4, 2018.

If any of our significant security holders acted together, they could be able to exert substantial influence over our

business. This concentration of voting power could delay, defer or prevent a change of control, entrench our management
and the board of directors or delay or prevent a merger, consolidation, takeover or other business combination involving us
on terms that other stockholders may desire. In addition, conflicts of interest could arise in the future between us, on the
one hand, and either of our significant securityholders on the other hand, concerning potential competitive business
activities, business opportunities, the issuance of additional securities and other matters.

Although there are contractual limitations on the beneficial ownership of Baker Brothers, if Baker Brothers were to

exercise their warrants for common stock or convert their preferred stock, and/or choose to act together with any of our
other significant security holders, they could be able to exert substantial influence over our business. This concentration of
voting power could delay, defer or prevent a change of control, entrench our management and the board of directors or
delay or prevent a merger, consolidation, takeover or other business combination involving us on terms that other
stockholders may desire. In addition, conflicts of interest could arise in the future between us, on the one hand, and either
or all of our significant securityholders on the other hand, concerning potential competitive business activities, business
opportunities, the issuance of additional securities and other matters.

Furthermore in the event of a sale of our company, whether by merger, sale of all or substantially all of our assets or

otherwise, Baker Brothers would be entitled to receive, with respect to each share of common stock issuable upon
conversion of preferred stock or exercise of warrants then held by them and without regard to the beneficial ownership
limitations imposed on the conversion or exercise of such securities, the same amount and kind of securities, cash or
property as they would have been entitled to receive if such securities had been converted into or exercised for shares of
our common stock immediately prior to such sale of our company. Because Baker Brothers would receive this sale
consideration with respect to preferred stock and warrants not included in their reported beneficial ownership of our
common stock, in the event of a sale of our company, they would be entitled to receive a significantly larger portion of the
total proceeds distributable to the holders of our securities than is represented by their reported beneficial ownership of our
common stock.

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Our  stock  price  has  been  and  may  in  the  future  be  extremely  volatile.  In  addition,  because  our  common  stock  has
historically  been  traded  at  low  volume  levels,  our  investors'  ability  to  trade  our  common  stock  may  be  limited.  As  a
result, investors may lose all or a significant portion of their investment.

Our stock price has been and may in the future be volatile. During the period from January 1, 2019 to February 15,
2020, the closing sales price of our common stock ranged from a high of $4.19 per share to a low of $1.45 per share. The
stock market has also experienced periods of significant price and volume fluctuations and the market prices  of
biotechnology companies in particular have been highly volatile, often for reasons that have been unrelated to the operating
performance of particular companies. The market price for our common stock may be influenced by many factors,
including:

·

·

·

·

·

·

·

·

·

·

·

·

·

our cash resources;

timing and results of nonclinical studies and clinical trials of our drug candidates or those of our competitors;

the regulatory status of our drug candidates;

failure of any of our drug candidates, if approved, to achieve commercial success;

the success of competitive products or technologies;

regulatory developments in the United States and foreign countries;

our success in entering into collaborative agreements;

developments or disputes concerning patents or other proprietary rights;

the departure of key personnel;

our ability to maintain the listing of our common stock on The Nasdaq Capital Market (“Nasdaq”) or an
alternative national securities exchange;

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

the terms of any financing consummated by us;

changes in the structure of healthcare payment systems;

· market conditions in the pharmaceutical and biotechnology sectors and issuance of new or changed securities

analysts' reports or recommendations; and

·

general economic, industry, and market conditions.

In addition, our common stock has historically been traded at low volume levels and may continue to trade at low

volume levels. As a result, any large purchase or sale of our common stock could have a significant impact on the price of
our common stock and it may be difficult for investors to sell our common stock in the market without depressing the
market price for the common stock or at all.

As a result of the foregoing, investors may not be able to resell their shares at or above the price they paid for such

shares. Investors in our common stock must be willing to bear the risk of fluctuations in the price of our common stock and
the risk that the value of their investment in our stock could decline.

If securities analysts do not publish research reports about our business or if they downgrade us or our sector, the price
of our common stock could decline.

The trading market for our common stock will depend in part on research reports that industry or financial analysts

publish about the us and our business. If analysts downgrade us or other research analysts downgrade the industry in which
we operate or the stock of any of our competitors, the price of our common stock may decline. Additionally, we currently
only have six analysts covering our stock. We lack the potential benefit that coverage by other analysts may provide.

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Our financial statements, including our balance sheets and statements of operations and comprehensive loss, are
subject to quarterly changes related to the revaluation our warrant and future tranche right liabilities.

In accordance with ASC Topic 480, Liabilities-Distinguishing from Equity and/or ASC Topic 815, Accounting for

Derivative Instruments and Hedging Activities, our outstanding Series B1 convertible preferred shares are accounted for as
temporary equity and related warrants and future tranche rights issued in connection with our December 2019 Private
Placement are accounted for as liabilities at fair value.  Accordingly, the associated warrant and future tranche right
liabilities are re-measured at each reporting period with changes in fair value recorded in earnings. The process of
determining the fair value of the warrants and future tranche rights requires complex models and the development of
significant and subjective estimates that may, and are likely to, change over the duration of the instrument with related
changes in internal and external market factors. As a result, our financial statements and results of operations may fluctuate
quarterly, based on factors, such as the trading value of our common stock and certain assumptions, which are outside of
our control. The liabilities and accounting line items associated with our warrant and future tranche right liabilities on our
balance sheet and statement of operations are non-cash items, and the inclusion of such items in our financial statements
may materially affect the outcome of our quarterly and annual results, even though such items are non-cash and do not
affect the cash we have available for operations. Investors should take such accounting matters and other non-cash items
into account when comparing our quarter-to-quarter and year-to-year operating results and financial statements.

We completed a private placement of our Series B1 preferred stock in December 2019 and are contingently obligated to
sell shares of Series B2, Series B3 and Series B4 preferred stock and warrants to the extent Baker Brothers exercise its
option to purchase these securities pursuant to the December 2019 Securities Purchase Agreement. If we are required to
redeem  shares  of  Series  B1,  Series  B2,  Series  B3  or  Series  B4  preferred  stock,  or  in  the  event  the  we  do  not  receive
required  shareholder  approval  and  the  option  fee  we  received  pursuant  to  the  December  2019  Securities  Purchase
Agreement is required to be returned to Baker Brothers, our cash position will be negatively impacted. In addition, we
may not have sufficient funds to redeem such shares of preferred stock.

Pursuant to the December 2019 Securities Purchase Agreement, we issued 23,684 shares of Series B1 preferred

stock in connection with our December 2019 private placement and are contingently obligated to issue 98,685 shares of
Series B2 preferred stock, 82,814 shares of Series B3 preferred stock and 82,418 shares of Series B4 preferred stock and
accompanying warrants exercisable for either common stock or Series B1 preferred stock, to the extent Baker Brothers
exercise its option to purchase these securities pursuant to the December 2019 Securities Purchase Agreement. We received
a $6.2 million contingently refundable option fee pursuant to the December 2019 Securities representing $0.125 for each
share of our common stock underlying (i) the Series B2 preferred stock and accompanying warrants, (ii) the Series B3
preferred stock and accompanying warrants and (iii) Series B4 preferred stock and accompanying warrants, issuable in the
transaction. In the event we do not receive the required shareholder approval to increase our authorized shares of common
stock in an amount sufficient to cover the conversion of Series B2, Series B3 and Series B4 preferred stock and warrants on
or prior to December 31, 2020, the option fee shall be returned to Baker Brothers within five business days after such date.
Although the Board recommends the stockholders support the proposal to increase the authorized shares, there can be no
assurance that such approval will be obtained.

Further, subject to the terms of the Certificate of Designations, Preferences and Rights of Series B1 Convertible

Preferred Stock, Series B2 Convertible Preferred Stock, Series B3 Convertible Preferred Stock and Series B4 Convertible
Preferred Stock of the Company, on or after the five-year anniversary of the applicable initial issuance date of each such
series of preferred stock, and to the extent that the holder’s redemption rights with regard to such series of preferred stock
are not lost upon our achievement of certain criteria regarding our stock price and ILLUMINATE-301 on or before the two-
year anniversary date of the applicable initial issuance date, some or all of our outstanding shares of such series of preferred
stock may be redeemable at the option of the holder at a redemption price of $152.00 per share of Series B1 and Series B2
preferred stock and $182.00 per share of Series B3 and Series B4 preferred stock, upon delivery of an irrevocable written
notice to us. If a holder of preferred stock requests redemption, we will be required to redeem such shares of preferred
stock, subject to certain provisions regarding insufficient funds. We may be unable to redeem such preferred stock if
restrictions under applicable law or contractual obligations prohibit such redemption. For example, Delaware law provides
that a redemption on capital stock may only be paid from “surplus” or, if there is no “surplus,” from a corporation’s net
profits for the then-current or the preceding fiscal year. Unless we operate profitably, our ability to redeem the preferred
stock would require the availability of adequate “surplus,” which is defined as the excess, if any, of our net assets (total
assets less total liabilities) over our capital. To date, we have operated at a loss. To the extent a

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Series B preferred stockholder exercises its redemption rights when it is eligible to do so, and if we do not have sufficient
“surplus” under Delaware law at that time, we would be unable to effect such redemption. If we do have sufficient
“surplus” to effect such redemption at that time, our available cash will be negatively impacted and our ability to use the
net proceeds from this offering could be substantially limited. In addition, such reduction in our available cash could
decrease the trading price of our common stock.

The issuance or sale of shares of our common stock, or rights to acquire shares of our common stock, including the
issuance  of  our  securities  pursuant  to  the  December  2019  Securities  Purchase  Agreement,  could  depress  the  trading
price of our common stock.

Under the terms of the December 2019 Securities Purchase Agreement, the private placement transaction consists of

four separate tranches. In the first tranche, we issued and sold 23,684 shares of Series B1 preferred stock, at a purchase
price of $152 per share and a conversion price of $1.52 per share, and related warrants to purchase up to 2,368,400 shares
of common stock (or, if the holder elects to exercise the warrants for shares of Series B1 preferred stock, 23,684 shares of
Series B1 preferred stock), at an exercise price of $1.52 per share (or, if the holder elects to exercise the warrants for shares
of Series B1 Preferred Stock, $152 per Series B1 preferred share).  In addition, we agreed to issue and sell the following
securities in future tranches: (i) tranche 2 consists of 98,685 shares of Series B2 preferred stock, at a purchase price of $152
per share and a conversion price of $1.52 per share, and related warrants to purchase up to 9,868,500 shares of common
stock (or, if the holder elects to exercise the warrants for shares of Series B1 preferred stock, 98,685 shares of Series B1
preferred stock), at an exercise price of $1.52 per share (or, if the holder elects to exercise the warrants for Series B1
preferred stock, $152 per Series B1 preferred share); (ii) tranche 3 consists of 82,418 shares of Series B3 preferred stock, at
a purchase price of $182 per share and a conversion price of $1.82 per share, and related warrants to purchase up to
6,593,440 shares of common stock (or, if the holder elects to exercise the warrants for shares of Series B1 preferred stock,
65,934 shares of Series B1 preferred stock), at an exercise price of $1.82 per share (or, if the holder elects to exercise the
warrants for Series B1 preferred stock, $182 per Series B1 preferred share); and (iii) tranche 4 consists of 82,418 shares of
Series B4 preferred stock, at a purchase price of $182 per share and a conversion price of $1.82 per share, and related
warrants to purchase up to 6,593,440 shares of common stock (or, if the holder elects to exercise the warrants for shares of
Series B1 preferred stock, 65,934 shares of Series B1 preferred stock), at an exercise price of $1.82 per share (or, if the
holder elects to exercise the warrants for Series B1 preferred stock, $182 per Series B1 preferred share), for additional
gross proceeds of up to $87.6 million, each tranche to occur at such investors’ discretion. However, if at any time following
the closing date of tranche 3 our common stock has achieved a closing price on the Nasdaq Capital Market of at least $7.60
for twenty (20) days out of any thirty (30) consecutive day period, we may elect to terminate Baker Brothers’ right to
purchase shares in tranche 4 that were not issued and sold prior to such date.

In addition, we may conduct future offerings of our common stock, preferred stock or other securities that are
convertible into or exercisable for our common stock to finance our operations or fund acquisitions, or for other purposes.
If (i) we issue shares of common stock pursuant to the conversion or exercise of the securities issuable under the December
2019 Securities Purchase Agreement, (ii) we issue additional shares of our common stock or rights to acquire shares of our
common stock in other future transactions, (iii) any of our existing stockholders sells a substantial amount of our common
stock, or (iv) the market perceives that such issuances or sales may occur, then the trading price of our common stock may
significantly decrease. In addition, our issuance of additional shares of common stock will dilute the ownership interests of
our existing common stockholders.

Certain  investors  in  the  December  2019  private  placement  will  have  the  ability  to  control  or  significantly  influence
certain business decisions.

Pursuant to the terms of the December 2019 Securities Purchase Agreement, subject to certain conditions, Baker
Brothers have consent rights over certain significant matters of the Company’s business. These include decisions to (i)
issue or authorize equity securities that rank equal or senior to the Series B1, Series B2, Series B3 and Series B4 preferred
stock with respect to liquidation preference, (ii) incur any indebtedness in excess of $1,000,000 , in the aggregate, outside
the ordinary course of business (other than the refinancing of the Company’s existing term debt), (iii) sell, transfer or
otherwise dispose of tilsotolimod (such approval not to be reasonably withheld), (iv) license tilsotolimod in the United
States or the European Union (in each case such approval not to be unreasonably withheld), or (v) pay any dividends. As a
result, Baker Brothers will have significant influence over certain matters affecting our business.

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Because we do not intend to pay dividends on our common stock, investor returns will be limited to any increase in the
value of our stock.

We have never declared or paid any cash dividends on our common stock. We currently intend to retain all available
funds and any future earnings to support our operations and finance the growth and development of our business and do not
anticipate declaring or paying any cash dividends on our common stock for the foreseeable future. Additionally, the
December 2019 Securities Purchase Agreement, more fully described below, contains negative covenants which restricts
our ability to pay dividends on our equity securities. Any return to stockholders will therefore be limited to the appreciation
of their stock, if any. 

Item 1B.    Unresolved Staff Comments.

None.

Item 2.    Properties.

We lease approximately 11,000 square feet of office space located in Exton, Pennsylvania. The lease was to expire on

May 31, 2020, subject to a five-year renewal option.  In December 2019, we elected to exercise the five-year renewal
option which extended the lease through May 31, 2025.  We may terminate the lease at any point as long as we remain a
member of the landlord’s group and require a space with more square footage.  We have specified rights to sublease this
facility.

Item 3.    Legal Proceedings.

None.

Item 4.    Mine Safety Disclosures.

Not applicable.

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Item 5.

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

Purchases of Equity Securities.

PART II.

Market Information

Our common stock is listed under the symbol “IDRA” on the Nasdaq.

Holders of Record

As of February 15, 2020, we had approximately 57 common stockholders of record registered on our books,

excluding shares held through banks and brokers.

Dividends

We have never declared or paid cash dividends on our common stock, and we do not expect to pay any cash

dividends on our common stock in the foreseeable future. The declaration and payment of dividends in the future, of which
there can be no assurance, will be determined by our board of directors in light of conditions then existing, including
earnings, financial condition, capital requirements and other factors. In addition, the December 2019 Securities Purchase
Agreement, more fully described below, contains negative covenants which restricts our ability to pay dividends on our
equity securities.

Securities Authorized for Issuance Under Equity Compensation Plans

The following table provides information as of December 31, 2019 regarding total shares subject to outstanding
stock options, warrants and rights and total additional shares available for issuance under our existing equity incentive and
employee stock purchase plans. In addition, from time to time, we grant “inducement grants” pursuant to Nasdaq Listing
Rule 5635(c)(4).

Plan Category
Equity compensation plans approved by

stockholders (1)

Equity compensation plans not approved by

stockholders (2)

Total

  Number of Securities

to be Issued Upon
Exercise of

Weighted-Average
Exercise Price of

  Outstanding Options,
  Warrants and Rights

  Outstanding Options,
  Warrants and Rights

(a)

(b)

Number of Securities
Remaining Available for
Future Issuance Under

  Equity Compensation Plans

(Excluding Securities 
Reflected in Column (a))
(c)

4,020,292

393,750

4,414,042

 $

 $

$

11.67

26.76

13.08

2,622,581

—

2,622,581

(1) Consists of our: 2008 Stock Incentive Plan; 2013 Stock Incentive Plan and 2017 Employee Stock Purchase Plan. Amounts in
column (a) include stock options and unvested restricted stock units outstanding. Shares are available for future issuance only
under our 2013 Stock Incentive Plan and 2017 Employee Stock Purchase Plan.

(2) Consists of stock options issued as inducement grants as of December 31, 2019. These stock options are generally subject to

the same terms and conditions as those awarded pursuant to the plans approved by our stockholders.

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Recent Sales of Unregistered Securities

The following is a summary of transactions by us involving sales of our securities that were not registered under the

Securities Act during the year ended December 31, 2019.

December 2019 Private Placement

On December 23, 2019, we filed a current report on Form 8-K reporting a private placement transaction pursuant to

a Securities Purchase Agreement, dated as of December 23, 2019, by and between us and certain institutional  investors
(the “December 2019 Securities Purchase Agreement”).  For additional information regarding the transaction, see Note 7 to
the financial statements included in this report.

Concurrent with the private placement, we amended outstanding warrants initially issued on May 7, 2013,
September 30, 2013 and February 10, 2014 to remove expiration date.  Following the amendment, these warrants will not
expire.

Issuer Purchases of Equity Securities

We did not repurchase any of our equity securities during the year ended December 31, 2019.

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Item 6.

Selected Financial Data.

The following selected financial data are derived from our financial statements. The data should be read in

conjunction with Management’s Discussion and Analysis of Financial Condition and Results of Operations and the
financial statements, related notes, and other financial information included elsewhere in this Annual Report on Form 10-K.

Statement of Operations and Comprehensive Loss
Data:
Alliance revenue
Operating expenses:

Research and development
General and administrative
Merger-related costs, net
Restructuring costs

Total operating expenses

Loss from operations
Other income (expense):

Interest income
Interest expense
Warrant revaluation expense
Future tranche right revaluation expense
Foreign currency exchange (loss) gain

Net loss
Deemed dividend related to December 2019 Private
Placement (1)
Net loss applicable to common stockholders

Net loss per share applicable to common
stockholders - basic and diluted
Weighted-average number of common shares used in
computing net loss per common share applicable to
common stockholders - basic and diluted (2)

Comprehensive loss:
Net loss
Other comprehensive income (loss):

Unrealized income (loss) on available-for-sale
securities

Total other comprehensive income (loss)

Comprehensive loss

Balance Sheet Data:
Cash, cash equivalents and investments
Working capital
Total assets
Note payable
Accumulated deficit
Total stockholders’ equity (deficit)

$

$

$

$

$

2019

Year Ended December 31, 
2018
2017
(In thousands, except per share data)

2016

2015

$

1,448  

$

662   $

902   $

16,199   $

249  

34,853  
12,481  
 —  
181  
47,515  
(46,067) 

1,150  
 —  
(598) 
(10,964) 
(36) 
(56,515) 

(28,043) 
(84,558) 

41,841  
15,420  
1,245  
3,112  
61,618  
(60,956) 

50,653  
15,588  
1,128  
 —  
67,369  
(66,467) 

39,824  
15,132  
 —  
 —  
54,956  
(38,757) 

1,089  
(11) 
 —  
 —  
(3) 
(59,881)  $

574  
(50) 
 —  
 —  
(41) 
(65,984)  $

415  
(80) 
 —  
 —  
33  
(38,389)  $

 —  
(59,881)  $

 —  
(65,984)  $

 —  
(38,389)  $

$

$

33,699  
15,396  
 —  
 —  
49,095  
(48,846) 

357  
(105) 
 —  
 —  
39  
(48,555) 

 —  
(48,555) 

(2.96) 

$

(2.25)  $

(3.35)  $

(2.41)  $

(0.42) 

28,545  

26,601  

19,675  

15,950  

14,387  

(56,515) 

(59,881) 

(65,984) 

(38,389) 

(48,555) 

$

$

 —  
 —  
(56,515) 

42,793  
(8,249) 
47,489  
 —  
(720,890) 
(11,168) 

 —  
 —  
(59,881)  $

17  
17  
(65,967)  $

117  
117  
(38,272)  $

(117) 
(117) 
(48,672) 

71,431   $
63,789  
73,023  
 —  
(664,375) 
63,994  

112,629   $
106,512  
118,417  
209  
(604,494) 
107,695  

109,014   $
101,691  
113,231  
501  
(538,470) 
103,349  

87,157  
56,427  
92,276  
762  
(500,081) 
83,582  

(1) See Note 7 to the financial statements appearing elsewhere in this Form 10-K.

(2) Computed on the basis described in Note 17 to the financial statements appearing elsewhere in this Annual Report on Form 10-K. 

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Item 7. 
Operations.

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

The following discussion and analysis of our financial condition and results of operations should be read in conjunction
with our audited financial statements and the related notes appearing elsewhere in this Annual Report on Form 10-K.

Overview

We are a clinical-stage biopharmaceutical company with a business strategy focused on the clinical development,
and ultimately the commercialization, of drug candidates for both oncology and rare disease indications characterized by
small, well-defined patient populations with serious unmet medical needs. Our current focus is on our Toll-like receptor, or
TLR, agonist, tilsotolimod (IMO-2125), for oncology. We believe we can develop and commercialize targeted therapies on
our own. To the extent we seek to develop drug candidates for broader disease indications, we have entered into and may
explore additional collaborative alliances to support development and commercialization.

TLRs are key receptors of the immune system and play a role in innate and adaptive immunity. As a result, we

believe TLRs are potential therapeutic targets for the treatment of a broad range of diseases. Using our chemistry-based
platform, we have designed both TLR agonists and antagonists to act by modulating the activity of targeted TLRs. A TLR
agonist is a compound that stimulates an immune response through the targeted TLR. A TLR antagonist is a compound that
inhibits an immune response by blocking the targeted TLR.

Our current TLR-targeted clinical-stage drug candidate, tilsotolimod, is an agonist of TLR9. We are currently
developing tilsotolimod, via intratumoral injection, for the treatment of anti-PD1 refractory metastatic melanoma in
combination with ipilimumab, an anti-CTLA4 antibody marketed as Yervoy® by BMS, in a Phase 3 trial. We are also
evaluating intratumoral tilsotolimod in combination with nivolumab, an anti-PD1 antibody marketed as Opdivo® by BMS,
and ipilimumab for the treatment of multiple solid tumors in a Phase 2 trial.

Termination of Merger Agreement

On January 21, 2018, we entered into an Agreement and Plan of Merger, or the Merger Agreement, with BioCryst

Pharmaceuticals, Inc. (“BioCryst”). The board of directors of each of Idera and BioCryst unanimously approved the Merger
Agreement and the transactions contemplated thereby and the required regulatory approvals were received. However, the
proposed merger was subject to approval by the stockholders of Idera and BioCryst, and satisfaction of other customary
closing conditions, as specified in the Merger Agreement. At a special meeting of BioCryst stockholders held on July 10,
2018, BioCryst’s stockholders voted against the adoption of the Merger Agreement. Following such vote and in accordance
with the terms of the Merger Agreement, BioCryst terminated the Merger Agreement on July 10, 2018. In accordance with
the Merger Agreement, BioCryst paid us a fixed expense reimbursement amount of $6 million in connection with the
termination of the Merger Agreement. 

Corporate Consolidation and Wind-down of Discovery Operations

In July 2018, following an analysis of our gene-silencing technology platform and our research portfolio,

we  suspended our rare disease and discovery programs, including our nucleic acid chemistry research program, as part of
our overall strategy to focus on the development and commercialization of tilsotolimod. In connection with this focused
strategy, we closed our operating facility in Cambridge, Massachusetts and consolidated our operations to our Exton,
Pennsylvania location. We also eliminated a total of 18 employee positions, primarily in the area of discovery, representing
approximately 40% of our employee base. 

For further details on our clinical development programs, collaborative alliances and other information about our

business that impacts our financial condition and results of operations, see Item 1. Business.

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Critical Accounting Policies and Estimates

This management’s discussion and analysis of financial condition and results of operations is based on our financial

statements, which have been prepared in accordance with accounting principles generally accepted in the United States.
The preparation of these financial statements 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 financial
statements and the reported amounts of revenues and expenses during the reporting period. On an ongoing basis,
management evaluates its estimates and judgments, including those related to revenue recognition, stock-based
compensation and research and development prepayments, accruals and related expenses. Management bases its estimates
and judgments on historical experience and on various other factors that are believed to be 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 readily apparent from other sources. Actual results may differ from these estimates under different assumptions
or conditions.

We regard an accounting estimate or assumption underlying our financial statements as a “critical accounting

estimate” where:

·

·

the nature of the estimate or assumption is material due to the level of subjectivity and judgment necessary to
account for highly uncertain matters or the susceptibility of such matters to change; and

the impact of the estimates and assumptions on financial condition or operating performance is material.

While our significant accounting policies are described in more detail in Note 2 to our financial statements appearing

elsewhere in this Annual Report on Form 10-K, we believe the following accounting policies to be most critical to the
judgments and estimates used in the preparation of our financial statements.

Research and Development Prepayments, Accruals and Related Expenses

As part of the process of preparing our financial statements, we are required to estimate our accrued and prepaid
expenses for research and development activities performed by third parties, including Clinical Research Organizations
(“CROs”) and clinical investigators. These estimates are made as of the reporting date of the work completed over the life
of the individual study in accordance with agreements established with CROs and clinical trial sites. Some CROs invoice
us on a monthly basis, while others invoice upon achievement of milestones and the expense is recorded as services are
rendered. We determine the estimates of research and development activities incurred at the end of each reporting period
through discussion with internal personnel and outside service providers as to the progress or stage of completion of trials
or services, as of the end of each reporting period, pursuant to contracts with clinical trial centers and CROs and the agreed
upon fee to be paid for such services. We periodically confirm the accuracy of our estimates with the service providers and
make adjustments if necessary. Clinical trial site costs related to patient enrollments are recorded as patients are entered
into the trial.

Stock-Based Compensation

We recognize all share-based payments to employees and directors as expense in our statements of operations and

comprehensive loss based on their fair values. We record compensation expense over an award’s requisite service period, or
vesting period, based on the award’s fair value at the date of grant. Our policy is to charge the fair value of stock options as
an expense, adjusted for forfeitures, on a straight-line basis over the vesting period, which is generally four years for
employees and one year for directors.

We use the Black-Scholes option pricing model to estimate the fair value of stock option grants. The Black-Scholes
option pricing model relies on a number of key assumptions to calculate estimated fair values, including assumptions as to
average risk-free interest rate, expected dividend yield, expected life and expected volatility. For the assumed risk-free
interest rate, we use the U.S. Treasury security rate with a term equal to the expected life of the option. Our assumed
dividend yield of zero is based on the fact that we have never paid cash dividends to common stockholders and have no
present intention to pay cash dividends. We use an expected option life based on actual experience. Our assumption for
expected volatility is based on the actual stock-price volatility over a period equal to the expected life of the option.

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If factors change and we employ different assumptions for estimating stock-based compensation expense in future
periods, or if we decide to use a different valuation model, the stock-based compensation expense we recognize in future
periods may differ significantly from what we have recorded in the current period and could materially affect our operating
income (loss), net income (loss) and earnings (loss) per share. It may also result in a lack of comparability with other
companies that use different models, methods and assumptions. The Black-Scholes option pricing model was developed for
use in estimating the fair value of traded options that have no vesting restrictions and are fully transferable. These
characteristics are not present in our option grants. Although the Black-Scholes option pricing model is widely used,
existing valuation models, including the Black-Scholes option pricing model, may not provide reliable measures of the fair
values of our stock-based compensation.

Warrant and Future Tranche Right Liabilities and Related Revaluation Income (Expense)

We entered into the December 2019 Securities Purchase Agreement, as more fully described in Note 7 to our

financial statements appearing elsewhere in this Annual Report on Form 10-K, pursuant to which we issued shares of
convertible preferred stock with detachable warrants. Additionally, the December 2019 Securities Purchase Agreement
contains call options on redeemable preferred shares with warrants (conditionally exercisable for shares that are puttable),
which we refer to as future tranche rights.

We determined that these warrants and future tranche rights represent freestanding financial instruments and account
for both the warrants and future tranche rights as liabilities, which requires the measurement of the fair value of the liability
at the time of issuance and recording changes as a charge to current earnings at each reporting period, which is included in
Warrant Liability Revaluation Expense and/or Future Tranche Right Liability Revaluation Expense in the Company’s
statements of operations and comprehensive loss.

Warrant Liability.  We use an option pricing model to value our liability-classified warrants. Inherent in the valuation

model are assumptions related to volatility, risk-free interest rate, expected term, dividend rate, and other scenarios (i.e.
probability of complex features of the warrants being triggered). Due to the nature of and inputs in the model used to assess
the fair value of the warrants, it is not abnormal to experience significant fluctuations during each remeasurement period.

Future Tranche Right Liability.  We use both a binomial lattice model and a Monte Carlo simulation to value the
future tranche rights. We selected these models as we believe they are reflective of all significant assumptions that market
participants would likely consider in negotiating the transfer of the future tranche rights. Such assumptions include, among
other inputs, stock price volatility, risk-free rates, redemption and early exercise assumptions, cancellation and conversion
assumptions, and the potential for future adjustment of the conversion price due to a future dilutive financing. Due to the
nature of and inputs in the model used to assess the fair value of the future tranche rights, it is not abnormal to experience
significant fluctuations during each remeasurement period.

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Results of Operations

Years ended December 31, 2019, 2018 and 2017

Alliance Revenue

Alliance revenues consist of revenue generated through collaborative research, development and/or

commercialization agreements and other out-licensing arrangements.  The terms of these agreements may include payment
to us of one or more of the following: nonrefundable, up-front license fees; research, development and commercial
milestone payments; and other contingent payments due based on the activities of the counterparty or the reimbursement by
licensees of costs associated with patent maintenance. 

Alliance revenue for the years ended December 31, 2019, 2018 and 2017 was comprised of the following: 

($ in thousands)
Out-license arrangement
GSK collaboration
Vivelix collaboration
Other

Total Alliance revenue

Year Ended December 31, 
(in thousands)
2018

2019

2017

2019 vs. 2018     

2018 vs. 2017

% Change

$

$

1,447  
 —  
 —  
 1  
1,448  

$

$

 —  
517  
56  
89  
662  

$

$

 —  
863  
14  
25  
902  

100% 
-100% 
-100% 
-99% 
119%  

0% (1)
-40% (2)
300% (3)
256% (4)
-27% 

(1) Alliance revenue for the year ended December 31, 2019 totaled $1.4 million and primarily related to the out-licensing

of certain non-core technology to Licensee during the second quarter of 2019.

(2) GSK collaboration revenues for each of the years ended December 31, 2018 and 2017 primarily relate to the

recognition of a $2.5 million upfront payment received in connection with the execution of the GSK Agreement in
November 2015, which was initially recorded as deferred revenue.  We recognized this deferred revenue as revenue on
a straight-line basis over the anticipated performance period under the GSK Agreement. The decrease in GSK
collaboration revenues during 2018, as compared to 2017, was primarily due to a change that we made during the
second quarter of 2017 with respect to our anticipated performance period under our collaboration with GSK from the
original estimate of 27 months to an updated estimate of 36 months, which we accounted for on a prospective basis.
Such performance period concluded in the fourth quarter of 2018. Accordingly, no such revenues were recognized
during 2019. See Part I, Item 1, "Business —Collaborative Alliances" of this Form 10-K for additional details
regarding our collaboration with GSK and Note 10 to the financial statements appearing elsewhere in this Annual
Report on Form 10-K for information on the related accounting treatment.

(3) Vivelix collaboration revenues for each of the years ended December 31, 2018 and 2017 reflect the reimbursement for
certain research activities we performed under the Vivelix Agreement, which was terminated on March 4, 2019.  No
such services were performed during 2019. See Part I, Item 1, "Business —Collaborative Alliances" of this Form 10-K
for additional details regarding our collaboration with Vivelix and Note 10 to the financial statements appearing
elsewhere in this Annual Report on Form 10-K for information on the related accounting treatment.

(4) Other revenues are comprised of amounts earned in connection with collaborations which are not material to our

current operations nor expected to be material in the future, including reimbursements by licensees of costs associated
with patent maintenance.

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Research and Development Expenses

For each of our research and development programs, we incur both direct and indirect expenses. We track direct

research and development expenses by program, which include third party costs such as contract research, consulting and
clinical trial and manufacturing costs. We do not allocate indirect research and development expenses, which may include
regulatory, laboratory (equipment and supplies), personnel, facility and other overhead costs (including depreciation and
amortization), to specific programs.

In the table below, research and development expenses are set forth in the following categories which are discussed

beneath the table:

($ in thousands)
IMO-2125 external development expense
IMO-8400 external development expense
Other drug development expense
Basic discovery expense
Severance and option modification expense
Total research and development expenses

  $

  $

2017

Year Ended December 31, 
(in thousands)
2018
23,388   $ 10,930  
8,484  
2,647  
16,682  
10,732  
8,980  
5,074  
5,577  
 —  
41,841   $ 50,653  

2019
25,494   $
45  
9,314  
 —  
 —  
34,853   $

% Change
     2019 vs 2018      2018 vs 2017  

9%  
-98% 
-13% 
-100% 
0%  
-17% 

114% (1)
-69%(2)
-36%(3)
-43%(4)
-100%(5)
-17% 

(1)

IMO-2125 External Development Expenses.    These expenses include external expenses that we have incurred
in connection with the development of tilsotolimod as part of our immuno-oncology program. These external
expenses include payments to independent contractors and vendors for drug development activities conducted
after the initiation of tilsotolimod clinical development in immuno-oncology, but exclude internal costs such as
payroll and overhead expenses. We commenced clinical development of tilsotolimod as part of our immuno-
oncology program in July 2015 and from July 2015 through December 31, 2019 we incurred approximately
$65.2 million in tilsotolimod external development expenses as part of our immuno-oncology program,
including costs associated with the preparation for and conduct of the ongoing Phase 1/2 clinical trial to assess
the safety and efficacy of tilsotolimod in combination with ipilimumab and with pembrolizumab in patients with
metastatic melanoma (ILLUMINATE-204), the preparation and conduct of our ongoing Phase 1b clinical trial of
tilsotolimod monotherapy in patients with refractory solid tumors (ILLUMINATE-101), the preparation for,
initiation and conduct of our ongoing Phase 3 clinical trial of tilsotolimod in combination with ipilimumab in
patients with metastatic melanoma (ILLUMINATE-301), the preparation for our Phase 2 clinical trial of
tilsotolimod in combination with nivolumab and ipilimumab for the treatment of solid tumor (ILLUMINATE-
206), and the manufacture of additional drug substance for use in our clinical trials and additional nonclinical
studies.

The increases in our IMO-2125 external development expenses in 2019 as compared to 2018 was primarily due
to increases in costs incurred with contract research organizations to support our ongoing ILLUMINATE-301
trial, which we initiated in the first quarter of 2018, and ILLUMINATE-206, which we initiated in the second
quarter of 2019.  The increase was partially offset by decreased expenses related to ILLUMINATE-101 and
ILLUMINATE-204 trials. 

The increases in our IMO-2125 external development expenses in 2018 as compared to 2017 was primarily due
to increases in costs incurred with contract research organizations to support (i) our ongoing ILLUMINATE-301
trial, which we initiated in the first quarter of 2018, (ii) our ongoing ILLUMINATE-101 trial, which we initiated
in March 2017, and (iii) our ongoing ILLUMINATE-204 trial, which we initiated in December 2015.

Going forward, we expect ongoing IMO-2125 external development expenses to be significant as our focus in
2020 continues to be on the clinical development of tilsotolimod (IMO-2125).  See additional information under
the heading “Financial Condition, Liquidity and Capital Resources” regarding our future funding requirements.

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(2)

IMO-8400 External Development Expenses.    These expenses include external expenses that we have incurred
in connection with IMO-8400 since October 2012, when we commenced clinical development of IMO-8400.
These external expenses include payments to independent contractors and vendors for drug development
activities conducted after the initiation of IMO-8400 clinical development but exclude internal costs such as
payroll and overhead expenses. Since October 2012, we incurred approximately $45.4 million in IMO-8400
external development expenses through December 31, 2019, including costs associated with our Phase 1 clinical
trial in healthy subjects; our Phase 2 clinical trial in patients with psoriasis, our Phase 1/2 clinical trial in patients
with Waldenström’s macroglobulinemia and our Phase 1/2 clinical trial in patients with diffuse large B-cell
lymphoma (“DLBCL”) harboring the MYD88 L265P oncogenic mutation, which we discontinued in September
2016; our Phase 2 clinical trial in patients with dermatomyositis, which we determined in July 2018 to
discontinue upon completion of final close-out activities; the manufacture of drug substance for use in our
clinical trials; and expenses associated with our collaboration with Abbott Molecular for the development of a
companion diagnostic for identification of patients with DLBCL harboring the MYD88 L265P oncogenic
mutation. In July 2018, we terminated further development of IMO-8400.  As a result, we expect IMO-8400
external development expenses to be insignificant in future periods.

The decrease in our IMO-8400 external development expenses in 2019 as compared to 2018 was due to the
decision to discontinue all development of IMO-8400 in July 2018. 

The decrease in our IMO-8400 external development expenses in 2018, as compared to 2017, was primarily due
to costs incurred during the 2017 period on clinical development of IMO-8400 for B-cell lymphomas, including
our trials in Waldenström’s macroglobulinemia and DLBCL harboring the MYD88 L265P oncogenic mutation,
which we did not incur in 2018 as a result of our decision in September 2016 to discontinue development of
IMO-8400 for treatment of B-cell lymphomas and focus on the development of IMO-8400 for the treatment of
dermatomyositis, which was subsequently discontinued in July 2018.

(3) Other Drug Development Expenses.    These expenses include external expenses associated with preclinical

development of identified compounds in anticipation of advancing these compounds into clinical development,
including IDRA-008. In addition, these expenses include internal costs, such as payroll and overhead expenses,
associated with preclinical development and products in clinical development. The external expenses associated
with preclinical compounds include payments to contract vendors for manufacturing and the related stability
studies, preclinical studies, including animal toxicology and pharmacology studies, and professional fees. Other
drug development expenses also include costs associated with compounds that were previously being developed
but are not currently being developed. In July 2018, we suspended further preclinical research.  As a result, we
expect other drug development expenses to be lower in future periods.

The decrease in other drug development expenses in 2019, as compared to 2018, was primarily due to a decrease
in internal employee and facility overhead related costs, as we suspended preclinical research activities in July
2018 and focused on the development of our clinical drug candidates.

The decrease in other drug development expenses in 2018, as compared to 2017, was primarily due to a decrease
in internal employee and facility overhead related costs and external costs of preclinical programs, including
related toxicology studies, bulk drug manufacturing and awareness and education programs, as we suspended
preclinical research activities in July 2018 and focused on the development of our clinical drug candidates.

(4) Basic Discovery Expenses.    These expenses include our internal and external expenses relating to our discovery
efforts with respect to our TLR-targeted programs, including agonists and antagonists of TLR3, TLR7, TLR8
and TLR9, and our nucleic acid chemistry research programs. These expenses reflect charges for laboratory
supplies, external research, and professional fees, as well as payroll and overhead expenses. In July 2018, we
suspended all internal discovery programs.  As a result, there were no basic discovery expenses in 2019.

The decrease in basic discovery expenses in 2018, as compared to 2017, was primarily due to decreases in
employee-related costs, lab supplies and facility overhead expenses as a result of our

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restructuring initiatives, including the suspension of all internal discovery programs and closing of our
Cambridge, Massachusetts facility.

(5) Severance and Option Modification Expenses. The expenses incurred during 2017 relate to charges for severance

benefits provided pursuant to a separation agreement entered into in April 2017 in connection with the
resignation of our former President of Research, effective May 31, 2017. Of the $5.6 million incurred, $1.3
million relates to severance pay in the form of salary continuation payments which was paid over a two-year
period through May 31, 2019 and a pro-rated 2017 bonus payment, and $4.3 million relates to non-cash stock-
based compensation expense resulting from modifications to previously issued stock option awards. No such
expenses were incurred in 2018 or 2019.

General and Administrative Expenses

General and administrative expenses consist primarily of payroll, stock-based compensation expense, consulting
fees and professional legal fees associated with our patent applications and maintenance, our corporate regulatory filing
requirements, our corporate legal matters, and our business development initiatives. For the years ended December 31,
2019, 2018 and 2017, general and administrative expenses totaled $12.5 million, $15.4 million, and $15.6 million,
respectively.

General and administrative expenses decreased by approximately $2.9 million, or 19.1%, in 2019, as compared to

2018.  The decreases were primarily due to lower facility-related costs as a result of cost savings realized in connection
with the closing of our Cambridge, Massachusetts facility post-restructuring in July 2018 and lower investor relations costs.

General and administrative expenses decreased by approximately $0.2 million, or 1.1%, in 2018, as compared to
2017, primarily due to lower employee related costs, partially offset by facility related costs incurred at our Cambridge,
Massachusetts facility post-restructuring in July 2018.

Merger-related Costs, net

Merger-related costs, net consists of charges and, where applicable, credits for transaction and integration-related
professional fees, employee retention, and other incremental costs directly related to these activities, which are offset by
merger termination fees.

Merger-related costs, net for the years ended December 31, 2018 and 2017 amounted to a net charge of $1.2 million
and $1.1 million, respectively.  The 2018 period was comprised of $7.2 million of expenses incurred in connection with the
transactions contemplated by the Merger Agreement, including legal and professional fees, partially offset by a $6.0
million fixed expense reimbursement received in connection with the termination of the Merger Agreement. No such costs
were incurred during 2019.

Restructuring Costs

Restructuring costs consist primarily of severance and related benefit costs related to workforce reductions, contract

termination and wind-down costs and asset impairments.

Restructuring costs for the years ended December 31, 2019 and 2018 totaled $0.2 million and $3.1 million,
respectively, and resulted from our decision in July 2018 to wind-down our discovery operations, reduce the workforce in
Cambridge, Massachusetts that supported such operations, and close our Cambridge facility. No such costs were incurred
during 2017.

Interest Income

Interest income for the years ended December 31, 2019, 2018 and 2017 totaled $1.2 million, $1.1 million, and $0.6

million, respectively. The year-over-year increases were primarily due to an increase in average investment balances,
including money market funds classified as cash equivalents as a result of our decision to invest more cash in interest
earning money market accounts in 2018.

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Amounts may fluctuate from period to period due to changes in average investment balances, including money

market funds classified as cash equivalents, and composition of investments.

Interest Expense

Interest expense for each of the years ended December 31, 2018 and 2017 totaled less than $0.1 million and related
to interest incurred on the outstanding balance of our note payable, which was paid off in June 2018.  Accordingly, no such
costs were incurred during 2019.

Warrant Revaluation Expense

During the year ended December 31, 2019, we recorded non-cash expense of approximately $0.6 million for warrant

revaluation charges associated with the revaluation of our liability-classified warrants subsequent to their December 2019
issuance in connection with the 2019 Private Placement. Due to the nature of and inputs in the model used to assess the fair
value of our outstanding warrants, it is not abnormal to experience significant fluctuations during each remeasurement
period. These fluctuations may be due to a variety of factors, including changes in our stock price and changes in estimated
stock price volatility over the remaining life of the warrants. Warrant revaluation expense for 2019 was driven primarily by
an increase in our stock price. No such expense was incurred during 2018 or 2017.

Future Tranche Right Revaluation Expense

During the year ended December 31, 2019, we recorded non-cash future tranche right revaluation expense of
approximately $11.0 million related to the change in fair value of the future tranche right liability (right to purchase
preferred stock and warrants to an investor at future dates) subsequent to their December 2019 issuance in connection with
the 2019 Private Placement. Due to the nature of and inputs in the model used to assess the fair value of the future tranche
rights, it is not abnormal to experience significant fluctuations during each remeasurement period. These fluctuations may
be due to a variety of factors, including changes in our stock price and changes in estimated stock price volatility over the
remaining estimated lives of the future tranche rights. Future tranche right revaluation expense for 2019 was driven
primarily by an increase in our stock price. No such expense was incurred during 2018 or 2017.

Net Loss and Net Loss Attributable to Common Stockholders

As a result of the factors discussed above, our net loss was $56.5 million, $59.9 million, and $66.0 million for the

years ended December 31, 2019, 2018 and 2017, respectively. For the year ended December 31, 2019, net loss attributable
to common stockholders was $84.6 million, a difference of $28.0 million compared to net loss for the same period due to a
deemed dividend related to the excess fair value provided to Baker Brothers in connection with the December 2019 Private
Placement. See Note 7 for additional details. For the years ended December 31, 2018 and 2017, net loss was the same as
net loss attributable to common stockholders.

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Net Operating Loss Carryforwards

In December 2017, the Tax Cuts and Jobs Act (“TCJA”) was signed into law. Among other things, the TCJA
permanently lowered the corporate federal income tax rate to 21% from the existing maximum rate of 35%, effective for
tax years including or commencing January 1, 2018. Certain provisions from the Tax Reform Act of 1986 were not
impacted by TCJA, such as those limiting the amount of net operating loss carryforwards (“NOLs”) and tax credit
carryforwards that companies may utilize in any one year in the event of changes in ownership as defined by Section 382 of
the Internal Revenue Code.

We have completed several financings since the effective date of the Tax Reform Act of 1986, which as of
December 31, 2019, have resulted in ownership changes that will significantly limit our ability to utilize our net operating
loss and tax credit carryforwards. In December 2017, we completed a study which determined that ownership changes had
occurred. The federal and state net operating loss and tax credit carryforwards and related deferred tax assets discussed
below and included in Note 14 to the financial statements appearing elsewhere in this Annual Report on Form 10-K have
been adjusted to reflect the limitations that resulted from this study. The Company continues to monitor equity activity and
potential ownership changes.

As of December 31, 2019, we had cumulative federal and state NOLs of approximately $295.8 million and $290.2

million available to reduce federal and state taxable income, respectively. As a result of TCJA, federal net operating losses
incurred for taxable years beginning after January 1, 2018 have an unlimited carryforward period, but can only be utilized
to offset 80% of taxable income in future taxable periods. Of the $295.8 million of federal NOLs, $98.4 million have an
unlimited carryforward and the remaining NOLs are still subject to expiration through 2037. State NOLs are still subject to
expiration according to the laws of each respective jurisdiction. We file state tax returns in Massachusetts and Pennsylvania
whereby both jurisdictions impose a 20-year carryforward period. All $290.2 million of state NOLs expire through 2039,
with the first year of expiration being 2032 for $21.0 million of Massachusetts NOLs. In addition, at December 31, 2019,
we had cumulative federal and state tax credit carryforwards of $21.6 million and $1.9 million, respectively, available to
reduce federal and state income taxes, respectively, which expire through 2039 and 2034, respectively, for federal and state
purposes. 

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Financial Condition, Liquidity and Capital Resources

Financial Condition

As of December 31, 2019, we had an accumulated deficit of $720.9 million. To date, substantially all of our

revenues have been from collaboration and license agreements and we have received no revenues from the sale of
commercial products. We have devoted substantially all of our efforts to research and development, including clinical trials,
and we have not completed development of any commercial products. Our research and development activities, together
with our selling, general and administrative expenses, are expected to continue to result in substantial operating losses for
the foreseeable future. These losses, among other things, have had and will continue to have an adverse effect on our
stockholders’ equity, total assets and working capital. Because of the numerous risks and uncertainties associated with
developing drug candidates, and if approved, commercial products, we are unable to predict the extent of any future losses,
whether or when any of our drug candidates will become commercially available or when we will become profitable, if at
all.

Liquidity and Capital Resources

Overview

We require cash to fund our operating expenses and to make capital expenditures. Historically, we have funded our

cash requirements primarily through the following:

(i)

sale of common stock, preferred stock and warrants;

(ii) exercise of warrants;

(iii) debt financing, including capital leases;

(iv) license fees, research funding and milestone payments under collaborative and license agreements; and

(v) interest income.

We filed a shelf registration statement on Form S-3 on August 10, 2017, which was declared effective on September
8, 2017. Under this registration statement, we may sell, in one or more transactions, up to $250.0 million of common stock,
preferred stock, depository shares and warrants. As of February 15, 2020, we may sell up to an additional $107.5 million of
securities under this registration statement, which has been reduced for the full contractual amounts provided for under our
Common Stock Purchase Agreement with Lincoln Park Capital Fund LLC (the “LPC Purchase Agreement”) and our "At-
The-Market" Equity Program pursuant to a Equity Distribution Agreement with JMP Securities LLC (the “ATM
Agreement”), both of which are more fully described in Note 8 of the notes to our financial statements included in this
Annual Report on Form 10-K.

In addition to the potential funding under the LPC Purchase Agreement and ATM Agreement, the December 2019

Securities Purchase Agreement, more fully described in Note 7 to the financial statements appearing elsewhere in this
Annual Report on Form 10-K, provides for up to $97.7 million aggregate gross proceeds at the sole discretion of the Baker
Brothers, of which $10.1 million was received in December 2019. Assuming Baker Brothers exercises their rights under
the agreement and no other forms of external funding, we expect the proceeds could fund operations beyond an NDA filing
for tilsotolimod.

See Notes 7 and 8 to the financial statements appearing elsewhere in this Annual Report on Form 10-K for

additional information regarding our recent equity financings and common stock warrant activity.

Funding Requirements

We had cash, cash equivalents and investments of approximately $42.8 million at December 31, 2019, inclusive of

the $6.2 million contingently refundable option fee received in connection with the December 2019 Securities Purchase
Agreement. We believe based on our current operating plan, our existing cash, cash equivalents and investments on hand as
of December 31, 2019, excluding the $6.2 million contingently

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refundable option fee and including interest income and cash received through February 2020 from the ATM Agreement
and LPC Purchase Agreement,  will enable us to fund our operations into the first quarter of 2021. Specifically, we believe
our available funds will be sufficient to enable us to perform the following:

(i) Complete and disclose results from:

a)

b)

our Phase 1/2 clinical trial of tilsotolimod in combination with ipilimumab and pembrolizumab in anti-
PD1 refractory melanoma (ILLUMINATE-204); and

the Phase 1b monotherapy clinical trial of tilsotolimod in multiple refractory tumor types
(ILLUMINATE-101);

(ii) continue to execute on our ongoing Phase 3 clinical trial of tilsotolimod in combination with ipilimumab for the
treatment of anti-PD1 refractory metastatic melanoma (ILLUMINATE-301), including announcement of top-
line ORR and other preliminary data;

(iii) initiate and complete enrollment in the signal-finding stage of Part I of our Phase 2 study of tilsotolimod in
combination with nivolumab and ipilimumab for the treatment of MSS-CRC (ILLUMINATE-206), pending
results from the initial group of ten patients enrolled to evaluate safety;

(iv) fund certain investigator initiated clinical trials of tilsotolimod; and

(v) maintain our current level of general and administrative expenses in order to support the business.

We expect that we will need to raise additional funds in order to complete our ongoing clinical trials of tilsotolimod

and to continue to fund our operations. We are seeking and expect to continue to seek additional funding through
collaborations, the sale or license of assets or financings of equity or debt securities. We believe that the key factors that
will affect our ability to obtain funding are:

(i)

the results of our clinical development activities in our tilsotolimod program or any other drug candidates we
develop on the timelines anticipated;  

(ii) the cost, timing, and outcome of regulatory reviews;

(iii) competitive and potentially competitive products and technologies and investors' receptivity to tilsotolimod or
any other drug candidates we develop and the technology underlying them in light of competitive products and
technologies;

(iv) the receptivity of the capital markets to financings by biotechnology companies generally and companies with

drug candidates and technologies similar to ours specifically;

(v) the receptivity of the capital markets to any in-licensing, product acquisition or other transaction we may enter

into; and

(vi) our ability to enter into additional collaborations with biotechnology and pharmaceutical companies and the

success of such collaborations.

In addition, increases in expenses or delays in clinical development may adversely impact our cash position and

require additional funds or cost reductions.

Financing may not be available to us when we need it or may not be available to us on favorable or acceptable terms

or at all. Additionally, Baker Brothers may not exercise their right to purchase convertible preferred stock or exercise
warrants in connection with the December 2019 Securities Purchase Agreement and, while the Board recommends the
stockholders support the proposal to increase the authorized shares, in the event we do not receive the required shareholder
approval provided for in the December 2019 Purchase Agreement, the $6.2 million option fee we received is required to be
returned to Baker Brothers. We could be required to seek funds through collaborative alliances or through other means that
may require us to relinquish rights to some of our technologies, drug candidates or drugs that we would otherwise pursue
on our own. In addition, if we raise additional funds by issuing equity securities, our then existing stockholders may
experience dilution. The terms of any financing may adversely affect the holdings or the rights of existing stockholders. An
equity financing that involves existing stockholders may cause a concentration of ownership. Debt financing, if available,
may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring
additional debt, making capital expenditures or declaring dividends, and are likely to include rights that are senior to the
holders of our common stock. Any additional debt or equity financing may contain terms which are not

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favorable to us or to our stockholders, such as liquidation and other preferences, or liens or other restrictions on our assets.
As discussed in Note 14 to the financial statements appearing elsewhere in this Annual Report on Form 10-K, additional
equity financings may also result in cumulative changes in ownership over a three-year period in excess of 50% which
would limit the amount of net operating loss and tax credit carryforwards that we may utilize in any one year.

If we are unable to obtain adequate funding on a timely basis or at all, we will be required to terminate, modify or

delay our clinical trials of tilsotolimod, or relinquish rights to portions of our technology, drug candidates and/or products.

Cash Flows

The following table presents a summary of the primary sources and uses of cash for the years ended December 31,

2019, 2018 and 2017:

(in thousands)
Net cash provided by (used in):

Operating activities
Investing activities
Financing activities

Increase (decrease) in cash, cash equivalents and restricted cash

Year Ended December 31,

2019

2018

2017

$

$

(44,498)  $
(2,402) 
15,488  
(31,412)  $

(51,916)  $
215  
10,192  
(41,509)  $

(55,259)
28,064
59,157
31,962

Operating Activities.  The net cash used in operating activities for all periods presented consists primarily of our net
losses adjusted for non-cash charges and changes in components of working capital. The decrease in cash used in operating
activities for the year ended December 31, 2019, as compared to 2018, was primarily due to decreases in cash outflows
related to our prior discovery and other development programs, lower costs resulting from the closure of our Cambridge,
Massachusetts office, and no 2019 merger-related costs, partially offset by increased cash outflows related to our current
IMO-2125 development program. The decrease in cash used in operating activities for the year ended December 31, 2018,
as compared to 2017, was primarily due to decreases in cash outflows related to our discovery and development programs,
including payments to contract research organizations, partially offset by merger-related costs.

Investing Activities.  Cash provided by investing activities primarily consisted of the following amounts relating to

our investments in available-for-sale securities and purchases and disposals of property and equipment:

·

·

·

for the year ended December 31, 2019, proceeds from the maturity of available-for-sale securities of $42.1
million was fully offset by the purchase of $44.5 million of available-for-sale securities;

for the year ended December 31, 2018, proceeds of $0.3 million from the sale of property and equipment,
partially offset by purchases of less than $0.1 million of property and equipment; and

for the year ended December 31, 2017, proceeds from the maturity of available-for-sale securities of $28.3
million, partially offset by the purchase of $0.2 million of property and equipment.

Financing Activities.  Cash provided by financing activities primarily consisted of the following amounts raised in

connection with the following transactions:

·

·

for the year ended December 31, 2019, $15.4 million in aggregate net proceeds from financing arrangements
consisting of $10.1 million received pursuant to the December 2019 Securities Purchase Agreement, $3.7
million received pursuant to the LPC Purchase Agreement and $1.6 million received under the ATM
Agreement, plus an additional $0.1 million in proceeds from employee stock purchases under our 2017
Employee Stock Purchase Plan (“2017 ESPP”);

for the year ended December 31, 2018, $10.2 million in aggregate proceeds from the exercise of common stock
options and warrants and $0.2 million in proceeds from employee stock purchases under our 2017 ESPP,
partially offset by $0.2 million in payments made on our previously outstanding note payable; and

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·

for the year ended December 31, 2017, net proceeds of $53.8 million from our follow-on underwritten public
offering of our common stock in October 2017, excluding less than $0.1 million of costs that were unpaid at
December 31, 2017, and $5.7 million in aggregate net proceeds from employee stock purchases under our 2017
ESPP and the exercise of common stock options and warrants.

Contractual Obligations

As of December 31, 2019, our contractual commitments and the effects such commitments are expected to have on

our liquidity and cash flows in future periods were as follows:

(in thousands)
Operating leases
Total

Payments Due by Period

Total

Less than 1
year

1 - 3 years

3 - 5 years

More than 5
years

  $
  $

1,245   $
1,245   $

217   $
217   $

453   $
453   $

475   $
475   $

100  
100  

Our only material lease commitments relate to our facility in Exton, Pennsylvania, which expires on May 31, 2025.

Off-Balance Sheet Arrangements

As of December 31, 2019, we had no off-balance sheet arrangements.

New Accounting Pronouncements

New accounting pronouncements are discussed in Note 2 in the Notes to the Financial Statements in this Annual

Report on Form 10-K.

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Item 7A.

Quantitative and Qualitative Disclosures about Market Risk. 

As of December 31, 2019, all material assets and liabilities are in U.S. dollars, which is our functional currency.

We maintain investments in accordance with our investment policy. The primary objectives of our investment
activities are to preserve principal, maintain proper liquidity to meet operating needs and maximize yields. Although our
investments are subject to credit risk, our investment policy specifies credit quality standards for our investments and limits
the amount of credit exposure from any single issue, issuer or type of investment. We regularly review our investment
holdings in light of the then current economic environment. At December 31, 2019, all of our invested funds were invested
in money market funds classified in cash and cash equivalents on the accompanying balance sheet and commercial paper
classified in short-term investments on the accompanying balance sheet.

Based on a hypothetical ten percent adverse movement in interest rates, the potential losses in future earnings, fair

value of risk sensitive financial instruments, and cash flows are immaterial, although the actual effects may differ
materially from the hypothetical analysis.

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Item 8.

Financial Statements and Supplementary Data. 

All financial statements required to be filed hereunder are filed as listed under Item 15(a) of this Annual Report on

Form 10-K and are incorporated herein by this reference.

Quarterly Operating Results (Unaudited)

The following table presents the unaudited statement of operations and comprehensive loss data for each of the eight

quarters in the period ended December 31, 2019. The information for each of these quarters is unaudited, but has been
prepared on the same basis as the audited financial statements appearing elsewhere in this Annual Report on Form 10-K. In
our opinion, all necessary adjustments, consisting only of normal recurring adjustments, have been made to present fairly
the unaudited quarterly results when read in conjunction with the audited financial statements and the notes thereto
appearing elsewhere in this document. These operating results are not necessarily indicative of the results of operations that
may be expected for any future period.

Statement of Operations and
Comprehensive Loss Data:
Alliance revenue
Operating expenses:

Research and development
General and administrative
Merger-related costs, net
Restructuring costs

Total operating expenses

Loss from operations
Other income (expense):

Interest income
Interest expense
Warrant revaluation expense
Future tranche right revaluation
expense
Foreign currency exchange gain
(loss)
Net loss
Deemed dividend related to December
2019 Private Placement (1)
Net loss applicable to common
stockholders

Net loss per share applicable to
common stockholders  - basic and
diluted
Weighted-average number of common
shares used in computing net loss per
share applicable to common
stockholders  - basic and diluted (2)

Comprehensive loss:
Net loss
Other comprehensive income (loss):
Unrealized gain (loss) on available-
for-sale securities

Total other comprehensive income
(loss)

Comprehensive loss

Dec. 31,
2019

Sep. 30,
2019

Jun. 30,
2019

Three months ended
  Dec. 31,

  Mar. 31,

2019

2018

Sep. 30,
2018

Jun. 30,
2018

  Mar. 31,

2018

(In thousands, except per share data)

  $

 —   $

 —   $

1,448   $

 —   $

99   $

145   $

163   $

8,368  
3,420  
 —  
 —  
11,788  
(11,788) 

158  
 —  
(598) 

(10,964) 

8,359  
3,023  
 —  
 5  
11,387  
(11,387) 

249  
 —  
 —  

 —  

10,024  
2,895  
 —  
45  
12,964  
(11,516) 

339  
 —  
 —  

 —  

8,102  
3,143  
 —  
131  
11,376  
(11,376) 

8,929  
3,571  
 —  
95  
12,595  
(12,496) 

8,860  
3,984  
(3,836) 
3,017  
12,025  
(11,880) 

10,664  
4,216  
1,583  
 —  
16,463  
(16,300) 

404  
 —  
 —  

 —  

330  
 —  
 —  

 —  

277  
 —  
 —  

 —  

271  
(4) 
 —  

 —  

255  

13,388  
3,649  
3,498  
 —  
20,535  
(20,280) 

211  
(7) 
 —  

 —  

(19) 
(2) 
  $ (23,232)  $ (11,133)  $ (11,176)  $ (10,974)  $ (12,150)  $ (11,605)  $ (16,031)  $ (20,095) 

(40) 

16  

(2) 

 1  

 2  

 5  

(28,043) 

 —  

 —  

 —  

 —  

 —  

 —  

 —  

  $ (51,275)  $ (11,133)  $ (11,176)  $ (10,974)  $ (12,150)  $ (11,605)  $ (16,031)  $ (20,095) 

  $

(1.76)  $

(0.39)  $

(0.39)  $

(0.40)  $

(0.45)  $

(0.43)  $

(0.59)  $

29,177  

28,847  

28,461  

27,676  

27,183  

27,175  

27,133  

(0.81) 

24,880  

  $ (23,232)  $ (11,133)  $ (11,176)  $ (10,974)  $ (12,150)  $ (11,605)  $ (16,031)  $ (20,095) 

(1) 

(1) 

 —  

 2  

 —  

 —  

 —  

 —  

 —  
 2  
  $ (23,233)  $ (11,134)  $ (11,176)  $ (10,972)  $ (12,150)  $ (11,605)  $ (16,031)  $ (20,095) 

 —  

 —  

 —  

 —  

(1) 

(1) 

(1)

(2)

See Note 7 to the financial statements appearing elsewhere in this Form 10-K.

Computed on the basis described in Note 17 to the financial statements appearing elsewhere in this Form 10-K.

78

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
    
    
    
    
    
    
    
 
 
 
 
 
      
 
      
 
      
 
      
 
      
 
      
 
      
 
      
 
 
   
 
   
 
   
 
   
 
   
 
   
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
  
 
   
 
   
 
   
 
   
 
   
 
   
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Item 9.     Changes in and Disagreements with Accountants on Accounting and Financial

Disclosure.

None. 

Item 9A.     Controls and Procedures.

Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and principal financial officer, evaluated

the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the
Exchange Act) as of December 31, 2019. In designing and evaluating our disclosure controls and procedures, management
recognizes that any controls and procedures, no matter how well designed and operated, can provide only reasonable
assurance of achieving their objectives and our management necessarily applied its judgment in evaluating the cost-benefit
relationship of possible controls and procedures. Based on this evaluation, our principal executive officer and principal
financial officer concluded that as of December 31, 2019, our disclosure controls and procedures were (1) designed to
ensure that material information relating to us is made known to our principal executive officer and principal financial
officer by others, particularly during the period in which this report was prepared, and (2) effective, in that they provide
reasonable assurance that information required to be disclosed by us in the reports we file or submit under the Exchange
Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

Internal Control over Financial Reporting

a) Management’s Annual Report on Internal Control over Financial Reporting

Our management, with the participation of our principal executive officer and principal financial officer, is

responsible for establishing and maintaining adequate internal control over financial reporting. Internal control over
financial reporting is defined in Rule 13a-15(f) and 15d-15(f) promulgated under the Exchange Act as a process designed
by, or under the supervision of, the Company’s principal executive and principal financial officers and effected by the
Company’s board of directors, management and other personnel, 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 and includes those policies and procedures that:

· Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and

dispositions of the assets of the Company;

· 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

· 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.

Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial
statement preparation and presentation. 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.

Management assessed the effectiveness of our internal control over financial reporting as of December 31, 2019. In

making this assessment, management used the criteria set forth by the Committee of Sponsoring Organizations of the
Treadway Commission in Internal Control — Integrated Framework (2013).

79

 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Based on its assessment, management believes that, as of December 31, 2019, the Company’s internal control over

financial reporting is effective based on those criteria.

Ernst & Young LLP, our independent registered public accounting firm, has issued an attestation report on the

effectiveness of our internal control over financial reporting as of December 31, 2019. This report appears immediately
below.

b)

Attestation Report of the Registered Public Accounting Firm

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Idera Pharmaceuticals, Inc.

Opinion on Internal Control over Financial Reporting

We have audited Idera Pharmaceuticals, Inc.’s internal control over financial reporting as of December 31, 2019, based on
criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of
the Treadway Commission (2013 framework) (the COSO criteria).  In our opinion, Idera Pharmaceuticals, Inc. (the
Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019,
based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United
States) (PCAOB), the balance sheets of Idera Pharmaceuticals, Inc. as of December 31, 2019 and 2018, and the related
statements of operations and comprehensive loss, redeemable preferred stock and stockholders’ equity  (deficit) and cash
flows for each of the three years in the period ended December 31, 2019, and the related notes and our report dated
March 11, 2020 expressed an unqualified opinion thereon that included an explanatory paragraph regarding the Company’s
ability to continue as a going concern.

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 assessed 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

80

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

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/ ERNST & YOUNG LLP

Philadelphia, Pennsylvania
March 11, 2020

c)

Changes in Internal Control over Financial Reporting.

No change in our internal control over financial reporting occurred during the fourth quarter of the fiscal year ended

December 31, 2019 that has materially affected, or is reasonably likely to materially affect, our internal control over
financial reporting.

Item 9B.

Other Information.  

None.

81

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

PART III.

Item 10.

Directors, Executive Officers, and Corporate Governance.

The information required by this item is incorporated by reference to our Proxy Statement for the 2020 Annual
Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days of the fiscal year ended
December 31, 2019.

We have adopted a written code of business conduct and ethics that applies to our principal executive officer,

principal financial officer, principal accounting officer or controller, or persons performing similar functions. We have
posted a current copy of the Code of Business Conduct and Ethics in the “Investors — Corporate Governance” section of
our website, which is located at www.iderapharma.com. We intend to satisfy the disclosure requirements under Item 5.05 of
Form 8-K regarding an amendment to, or waiver from, a provision of our code of business conduct and ethics by posting
such information on our website at www.iderapharma.com.

Item 11.

Executive Compensation.

The information required by this item is incorporated by reference to our Proxy Statement for the 2020 Annual
Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days of the fiscal year ended
December 31, 2019.

Item  12.

Security Ownership of Certain Beneficial Owners and Management and Related

Stockholder Matters.

The information required by this item is incorporated by reference to our Proxy Statement for the 2020 Annual
Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days of the fiscal year ended
December 31, 2019.

Item  13.

Certain Relationships and Related Transactions, and Director Independence.

The information required by this item is incorporated by reference to our Proxy Statement for the 2020 Annual
Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days of the fiscal year ended
December 31, 2019.

Item  14.

Principal Accountant Fees and Services.

The information required by this item is incorporated by reference to our Proxy Statement for the 2020 Annual
Meeting of Stockholders to be filed with the Securities and Exchange Commission within 120 days of the fiscal year ended
December 31, 2019.

82

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

PART IV.

Item 15.

Exhibits and Financial Statement Schedules.

(a)      (1)    Financial Statements.

Report of Independent Registered Public Accounting Firm 
Balance Sheets at December 31, 2019 and 2018 
Statements of Operations and Comprehensive Loss for the years ended
December 31, 2019, 2018 and 2017 
Statements of Redeemable Preferred Stock and Stockholders’ Equity (Deficit)
for the years ended December 31, 2019, 2018 and 2017 
Statements of Cash Flows for the years ended December 31, 2019, 2018 and
2017 
Notes to Financial Statements 

Page number in
this Report

F-2
F-3

F-4

F-4

F-6
F-7

(2) We are not filing any financial statement schedules as part of this Annual Report on Form 10-K because
they are not applicable or the required information is included in the financial statements or notes
thereto.

(3)

The list of Exhibits filed as a part of this Annual Report on Form 10-K is set forth on the Exhibit Index
below.

(b)

The list of Exhibits filed as a part of this Annual Report on Form 10-K is set forth on the Exhibit Index below.

(c)

None.

83

 
 
 
 
 
 
 
 
    
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Exhibit Index

Exhibit
Number    

Description
  Equity Distribution Agreement, dated November
26, 2018, by and between Idera Pharmaceuticals,
Inc. and JMP Securities LLC

    Form    SEC File No.

Incorporated by Reference to
   Exhibit(s)

8-K   001-31918  

1.1

Filing Date
  November 26, 2018

1.1

2.1

3.1

3.2

3.3

4.1

4.2

4.3

4.4

4.5

4.6

4.7

  Agreement and Plan of Merger, dated as January
21, 2018, by and among Idera Pharmaceuticals,
Inc., BioCryst Pharmaceuticals, Inc., Nautilus
Holdco, Inc., Island Merger Sub, Inc. and Boat
Merger Sub, Inc.

  Restated Certificate of Incorporation of Idera

Pharmaceuticals, Inc., as amended.

  Amended and Restated Bylaws of Idera

Pharmaceuticals, Inc.

  Certificate of Designations, Preferences and

Rights of Series B1 Convertible Preferred Stock,
Series B2 Convertible Preferred Stock, Series B3
Convertible Preferred Stock and Series B4
Convertible Preferred Stock of the Company

  Specimen Certificate for shares of Common

Stock, $.001 par value, of Idera Pharmaceuticals,
Inc.

  Form of Warrant issued in May 2013 to

purchasers in Idera Pharmaceuticals, Inc.’s
registered public offering on Idera
Pharmaceuticals, Inc.’s registration statement on
Form S-1 (File No. 333-187155)

  Form of Warrant issued in September 2013 to
purchasers in Idera Pharmaceuticals, Inc.’s
registered public offering on Idera
Pharmaceuticals, Inc.’s registration statement on
Form S-3 (File No. 333-191073)

  Form of Warrant issued in February 2014 to
purchasers in Idera Pharmaceuticals, Inc.’s
registered public offering on Idera
Pharmaceuticals, Inc.’s registration statement on
Form S-3 (File No. 333-191073)

  Registration Rights Agreement, dated as of

March 4, 2019, by and between Idera
Pharmaceuticals, Inc. and Lincoln Park Capital
Fund, LLC

  Form of Warrant issued in December 2019 to

purchasers in Idera Pharmaceuticals, Inc. private
placement transaction

  Unit Purchase Agreement by and among Idera
Pharmaceuticals, Inc. and certain persons and
entities listed therein, dated April 1, 1998

8-K   001-31918  

2.1

January 22, 2018

10-Q   001-31918  

3.1

August 2, 2018

10-K   001-31918  

3.2

  March 7, 2018

8-K   001-31918  

3.1

  December 23, 2019

S-1

  33-99024  

4.1

  December 8, 1995

10-Q   001-31918  

10.5

May 15, 2013

8-K   001-31918  

4.1

  September 26, 2013

8-K   001-31918  

4.1

February 5, 2014

10-K   001-31918  

4.5

  March 6, 2019

8-K   001-31918  

4.1

  December 23, 2019

10-K   000-27352  

10.39

April 1, 2002

84

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
    Form    SEC File No.

Incorporated by Reference to
   Exhibit(s)

Filing Date

8-K   001-31918  

10.2

  March 29, 2006

8-K   001-31918  

4.1

February 9, 2015

8-K   001-31918  

10.1

January 22, 2018

Table of Contents

Exhibit
Number    

Description

4.8

4.9

4.10

  Registration Rights Agreement, dated March 24,
2006, by and among Idera Pharmaceuticals, Inc.
and the Investors named therein

  Registration Rights Agreement, dated February
9, 2015, among Idera Pharmaceuticals, Inc. and
the Selling Stockholders named therein

  Amendment to the Registration Rights

Agreement, dated January 21, 2018, by and
among Idera Pharmaceuticals, Inc., 667, L.P.,
Baker Brothers Life Sciences, L.P. and 14159,
L.P.

4.11*   Registration Rights Agreement, dated December
23, 2019, by and among Idera Pharmaceuticals,
Inc. and certain investors named therein

4.12*   Voting Agreement, dated as of December 23,

2019, by and among Idera Pharmaceuticals, Inc.
and certain investors named therein

4.13*   Warrant Amendment Agreement, dated as of

December 23, 2019, by and among Idera
Pharmaceuticals, Inc. and certain holders of
warrants named therein 

4.14*   Description of the Idera Pharmaceuticals, Inc.
Securities Registered Under Section 12 of the
Securities Exchange Act of 1934

10.1†   2005 Stock Incentive Plan, as amended

10-Q   001-31918  

10.4

  August 14, 2006

10.2†   2008 Stock Incentive Plan, as amended

8-K   001-31918  

99.2

June 17, 2011

10.3†   2013 Stock Incentive Plan, as amended

8-K   001-31918  

10.1

June 13, 2014

10.4†   Amendment to 2013 Stock Incentive Plan, as

amended

10.5†   Amendment to 2013 Stock Incentive Plan, as

amended

8-K   001-31918  

10.1

June 11, 2015

8-K   001-31918  

10.1

June 9, 2017

10.6†   Amendment to 2013 Stock Incentive Plan, as

amended

  DEF14A   001-31918   Appendix

A

April 25, 2019

10.7†   2017 Employee Stock Purchase Plan

8-K   001-31918  

10.2

June 9, 2017

10.8†   Amendment to 2017 Employee Stock Purchase

Plan

  DEF14A   001-31918   Appendix

C

April 25, 2019

10.9

  Policy on Treatment of Stock Options in the

Event of Retirement, approved April 28, 2014

10.10†   Form of Incentive Stock Option Agreement

Granted Under the 2008 Stock Incentive Plan

10-Q   001-31918  

10.1

  August 12, 2014

8-K   001-31918  

10.2

June 10, 2008

85

 
 
 
  
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number    
10.11†   Form of Nonstatutory Stock Option Agreement

Description

Granted Under the 2008 Stock Incentive Plan

Incorporated by Reference to
   Exhibit(s)

Form    SEC File No.
8-K   001-31918  

10.3

Filing Date
June 10, 2008

10.12†   Form of Nonstatutory Stock Option Agreement

(Non-Employee Directors) Granted Under the
2008 Stock Incentive Plan

10.13†   Form of Restricted Stock Agreement Under the

2008 Stock Incentive Plan

10.14†   Form of Incentive Stock Option Agreement
granted under the 2013 Stock Incentive Plan

10.15†   Form of Nonstatutory Stock Option Agreement

granted under the 2013 Stock Incentive Plan

10.16†   Form of Nonstatutory Stock Option Agreement

(Non-Employee Directors) granted under the
2013 Stock Incentive Plan

10.17†   Form of Inducement Stock Option Award –

Nonstatutory Stock Option Agreement

10.18†   Form of Restricted Stock Agreement under the

2013 Stock Incentive Plan

10.19†   Separation Agreement and Release of Claims
dated April 18, 2017 between Idera
Pharmaceuticals, Inc. and Sudhir Agrawal

8-K   001-31918  

10.4

June 10, 2008

8-K   001-31918  

10.5

June 10, 2008

8-K   001-31918  

10.2

July 29, 2013

8-K   001-31918  

10.3

July 29, 2013

8-K   001-31918  

10.4

July 29, 2013

10-Q   001-31918  

10.1

  November 6, 2015

10-Q   001-31918  

10.3

August 8, 2019

10-Q   001-31918  

10.1

August 7, 2017

10.20†   Scientific Advisor Agreement effective June

10-K   001-31918  

10.30

  March 7, 2018

1,  2017 by and between Idera Pharmaceuticals,
Inc. and Sudhir Agrawal

10.21†   Consulting Services Agreement, dated October

31, 2018, by and between Idera Pharmaceuticals,
Inc. and Louis J. Arcudi, III

10.22†   Separation Agreement and Release, dated

October 31, 2018, by and between Idera
Pharmaceuticals, Inc. and Louis J. Arcudi, III

10.23†   Employment Letter Agreement, dated December
1, 2014, by and between Idera Pharmaceuticals,
Inc. and Vincent Milano

10.24†   Amendment to Employment Agreement, dated

January 10, 2020, by and between the Company
and Vincent J. Milano

10.25†   Form of Vincent J. Milano Restricted Stock Unit

Agreement

10.26†   Employment Letter, dated January 26, 2015, by

and between Idera Pharmaceuticals, Inc. and
Clayton Fletcher

10.27†   Employment Offer Letter, dated October 15,
2015, by and between Idera Pharmaceuticals,
Inc. and John J. Kirby

8-K   001-31918  

99.1

  November 2, 2018

8-K   001-31918  

99.2

  November 2, 2018

10-K   001-31918  

10.24

  March 12, 2015

8-K   001-31918  

10.1

January 15, 2020

8-K   001-31918  

10.2

January 15, 2020

10-Q   001-31918  

10.1

May 11, 2015

10-K   001-31918  

10.26

  March 6, 2019

86

 
 
 
  
  
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
Table of Contents

Exhibit
Number    
10.28†   Employment Letter, dated November 11, 2015 by

Description

and between Idera Pharmaceuticals, Inc. and
Joanna Horobin

Form    SEC File No.
10-K   001-31918  

Incorporated by Reference to
   Exhibit(s)

Filing Date

10.35

  March 7, 2018

10-K   001-31918  

10.36

  March 7, 2018

8-K   001-31918  

10.1

January 27, 2020

10-Q   001-31918  

10.1

  November 6, 2018

10-Q   001-31918  

10.4

August 8, 2019

10-Q   001-31918  

10.1

May 4, 2017

10-Q   001-31918  

10.2

May 4, 2017

10-Q   001-31918  

10.3

  August 12, 2014

10-K   001-31918  

10.56

  March 15, 2017

10-Q   001-31918  

10.1

August 2, 2018

10-Q   001-31918  

10.1

May 2, 2019

10-Q   001-31918  

10.1

  November 6, 2019

10-K   001-31918  

10.45

  March 7, 2018

10-K   001-31918  

10.46

  March 7, 2018

10.29†   Employment Letter, dated February 2, 2017, by

and between Idera Pharmaceuticals, Inc. and
Jonathan Yingling

10.30†   Amendment to Severance and Change of Control

Agreement, dated January 27, 2020, by and
between the Company and Dr. Jonathan Yingling

10.31†   Employment Offer Letter, dated August 20,

2018, by and between Idera Pharmaceuticals, Inc.
and Bryant D. Lim

10.32†   Employment Offer Letter, dated June 26, 2019,
by and between Idera Pharmaceuticals, Inc. and
Elizabeth Tarka

10.33†   Form of Director and Officer Indemnification

Agreement

10.34†   Form of Executive Severance and Change of

Control Agreement

10.35††   Development and Commercialization Agreement,

dated May 1, 2014, by and between Abbott
Molecular Inc. and Idera Pharmaceuticals, Inc.

10.36††   License Agreement, dated November 28, 2016,
by and between Idera Pharmaceuticals, Inc. and
Vivelix Pharmaceuticals, Ltd.

10.37††   Clinical Trial Collaboration and Supply

Agreement, by and between Idera
Pharmaceuticals, Inc. and Bristol-Myers Squibb
Company, dated May 18, 2018

10.38††   Clinical Trial Collaboration and Supply

Agreement, by and between Idera
Pharmaceuticals, Inc. and Bristol-Myers Squibb
Company, dated March 11, 2019

10.39††   Clinical Trial Collaboration and Supply

Agreement, effective August 27, 2019, by and
between AbbVie Inc. and Idera Pharmaceuticals,
Inc. 

10.40   Lease Agreement dated March 31, 2015, between

Idera Pharmaceuticals, Inc. and 505 Eagleview
Boulevard Associates, L.P.

10.41   First Amendment dated September 23, 2015 to

Lease Agreement dated March 31, 2015 between
Idera Pharmaceuticals, Inc. and 505 Eagleview
Boulevard Associates, L.P.

10.42*   Second Amendment dated January 13, 2020 to

Lease Agreement dated March 31, 2015 between
Idera Pharmaceuticals, Inc. and 505 Eagleview
Boulevard Associates, L.P.

87

 
 
 
  
  
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
Form    SEC File No.
10-K   001-31918  

Incorporated by Reference to
   Exhibit(s)

Filing Date

10.37

  March 6, 2019

8-K   001-31918  

10.1

  December 23, 2019

Table of Contents

Exhibit
Number    
10.47   Purchase Agreement, dated as of March 4, 2019,
by and between Idera Pharmaceuticals, Inc. and
Lincoln Park Capital Fund, LLC

Description

10.48   Securities Purchase Agreement, dated December
23, 2019, by and among the institutional
investors named therein

23.1*   Consent of Independent Registered Public

Accounting Firm

31.1*   Certification of Chief Executive Officer pursuant

to Exchange Act Rules 13a-14 and 15d-14, as
adopted pursuant to Section 302 of Sarbanes-
Oxley Act of 2002

31.2*   Certification of Chief Financial Officer pursuant

to Exchange Act Rules 13a-14 and 15d-14, as
adopted pursuant to Section 302 of Sarbanes-
Oxley Act of 2002

32.1*   Certification of Chief Executive Officer pursuant

to 18 U.S.C. Section 1350, as adopted pursuant
to Section 906 of the Sarbanes-Oxley Act of
2002

32.2*   Certification of Chief Financial Officer pursuant
to 18 U.S.C. Section 1350, as adopted pursuant
to Section 906 of the Sarbanes-Oxley Act of
2002

101.INS   XBRL Instance Document

101.SCH   XBRL Taxonomy Extension Schema

101.CAL   XBRL Taxonomy Extension Calculation

Linkbase Document

101.DEF   XBRL Taxonomy Extension Definition Linkbase

Document

101.LAB   XBRL Taxonomy Extension Labels Linkbase

Document

101.PRE   XBRL Taxonomy Extension Presentation

Linkbase Document

*

†

  Filed or furnished, as applicable, herewith.

  Management contract or compensatory plan or arrangement required to be filed as an Exhibit to the Annual

Report on Form 10-K.

††

In accordance with Item 601(b)(10) of Regulation S-K, portions of this exhibit have been omitted in order

for them to remain confidential.

88

 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Item 16.

Form 10-K Summary.

Not applicable.

89

 
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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the

Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on this
11  day of March 2020.

th

Idera Pharmaceuticals, Inc.

By:

/S/    VINCENT J. MILANO
Vincent J. Milano
President and
Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this report has been signed below

by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Signature

Title

Date

/S/    VINCENT J. MILANO
Vincent J. Milano

President, Chief Executive Officer and
Director (Principal Executive Officer)

March 11, 2020

/S/    JOHN J. KIRBY
John J. Kirby

Chief Financial Officer (Principal
Financial and Accounting Officer)

March 11, 2020

/S/    JAMES A. GERAGHTY
James A. Geraghty

/S/    CRISTINA CSIMMA
Cristina Csimma, Pharm. D., M.H.P.

/S/    MICHAEL DOUGHERTY
Michael Dougherty

/S/    MARK  GOLDBERG
Mark Goldberg, M.D.

/S/    MAXINE  GOWEN
Maxine Gowen, Ph.D.

/S/    HOWARD H. PIEN
Howard H. Pien

/S/    CAROL A. SCHAFER
Carol A. Schafer

Chairman of the Board of Directors

March 11, 2020

March 11, 2020

March 11, 2020

March 11, 2020

March 11, 2020

March 11, 2020

March 11, 2020

Director

Director

Director

Director

Director

Director

90

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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IDERA PHARMACEUTICALS, INC.

INDEX TO FINANCIAL STATEMENTS
December 31, 2019

Report of Independent Registered Public Accounting Firm 
Balance Sheets 
Statements of Operations and Comprehensive Loss 
Statements of Redeemable Preferred Stock and Stockholders’ Equity (Deficit) 
Statements of Cash Flows 
Notes to Financial Statements 

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REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of Idera Pharmaceuticals, Inc.

Opinion on the Financial Statements

We have audited the accompanying balance sheets of Idera Pharmaceuticals, Inc. (the Company) as of December 31, 2019
and 2018, and the related statements of operations and comprehensive loss, redeemable preferred stock and stockholders’
equity (deficit) 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 at 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 U.S. generally accepted
accounting principles.

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 issued by the Committee of Sponsoring Organizations of the
Treadway Commission (2013 framework) and our report dated March 11, 2020 expressed an unqualified opinion thereon.

The Company's Ability to Continue as a Going Concern

The accompanying financial statements have been prepared assuming that the Company will continue as a going concern.
As discussed in Note 1 to the financial statements, the Company has suffered recurring losses from operations, has a
working capital deficiency, and has stated that substantial doubt exists about the Company’s ability to continue as a going
concern. Management's evaluation of the events and conditions and management’s plans regarding these matters are also
described in Note 1. The financial statements do not include any adjustments that might result from the outcome of this
uncertainty.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion
on these 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 supporting 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.

/s/ ERNST & YOUNG LLP

We have served as the Company’s auditor since 2002.

Philadelphia, Pennsylvania
March 11, 2020

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Table of Contents

IDERA PHARMACEUTICALS, INC.
BALANCE SHEETS

December 31, 
2019

December 31, 
2018

(In thousands, except per share amounts)
ASSETS
Current assets:

Cash and cash equivalents
Short-term investments
Prepaid expenses and other current assets

Total current assets

Property and equipment, net
Operating lease right-of-use asset
Other assets
Total assets

LIABILITIES AND STOCKHOLDERS’ EQUITY (DEFICIT)
Current liabilities:
Accounts payable
Accrued expenses
Operating lease liability
Future tranche right liability

Total current liabilities
Warrant liability, long-term
Operating lease liability, net of current portion
Other liabilities

Total liabilities

Commitments and contingencies (Note 13)
Preferred stock, $0.01 par value, Authorized — 5,000 shares:
Series B1 redeemable convertible preferred stock (Note 7);
Designated — 278 shares, Issued and outstanding — 24 and 0 shares at
December 31, 2019 and December 31, 2018, respectively

Stockholders’ equity (deficit)
Preferred stock, $0.01 par value, Authorized — 5,000 shares:

Series A convertible preferred stock; Designated — 1,500 shares,
Issued and outstanding — 1 share

Common stock, $0.001 par value, Authorized — 70,000 shares; Issued
and outstanding — 29,672 and 27,188 at December 31, 2019 and
December 31, 2018, respectively
Additional paid-in capital
Accumulated deficit

Total stockholders’ equity (deficit)

Total liabilities and stockholders’ equity (deficit)

$

$

$

$

$

$

$

40,019  
2,774  
3,475  
46,268  
97  
1,054  
70  
47,489  

457  
7,461  
163  
46,436  
54,517  
3,241  
899  
 —  
58,657  

71,431  
 —  
1,376  
72,807  
207  
 —  
 9  
73,023  

1,134  
7,884  
 —  
 —  
9,018  
 —  
 —  
11  
9,029  

 —  

 —  

 —  

 —  

30  
709,692  
(720,890) 
(11,168) 
47,489  

$

27  
728,342  
(664,375) 
63,994  
73,023  

The accompanying notes are an integral part of these financial statements.

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Table of Contents

IDERA PHARMACEUTICALS, INC.
STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(In thousands, except per share amounts)
Alliance revenue
Operating expenses:

Research and development
General and administrative
Merger-related costs, net
Restructuring costs

Total operating expenses

Loss from operations
Other income (expense):

Interest income
Interest expense
Warrant revaluation expense
Future tranche right revaluation expense
Foreign currency exchange loss

Net loss
Deemed dividend related to December 2019 Private Placement (see
Note 7)
Net loss attributable to common stockholders

  $

  $

2019

Year Ended December 31,
2018

2017

  $

1,448      $

662      $

902  

34,853  
12,481  
 —  
181  
47,515  
(46,067) 

1,150  
 —  
(598) 
(10,964) 
(36) 
(56,515) 

(28,043) 
(84,558) 

$

$

41,841  
15,420  
1,245  
3,112  
61,618  
(60,956) 

1,089  
(11) 
 —  
 —  
(3) 
(59,881) 

 —  
(59,881) 

$

$

50,653  
15,588  
1,128  
 —  
67,369  
(66,467) 

574  
(50) 
 —  
 —  
(41) 
(65,984) 

 —  
(65,984) 

Net loss per share applicable to common stockholders - basic and
diluted (Note 17)
Weighted-average number of common shares used in computing net
loss per share applicable to common stockholders - basic and diluted  

  $

(2.96) 

$

(2.25) 

$

(3.35) 

28,545  

26,601  

19,675  

Comprehensive loss:
Net loss
Other comprehensive income (loss):

Unrealized gain on available-for-sale securities

Total other comprehensive income

Comprehensive loss

  $

(56,515) 

$

(59,881) 

$

(65,984) 

 —  
 —  
(56,515) 

$

 —  
 —  
(59,881) 

$

17  
17  
(65,967) 

  $

The accompanying notes are an integral part of these financial statements.

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IDERA PHARMACEUTICALS, INC.
STATEMENTS OF REDEEMABLE PREFERRED STOCK AND STOCKHOLDER’S EQUITY (DEFICIT)

Series B1 Preferred

Common Stock

  Additional  

  Accumulated  
Other

Total

  Number of  $0.001 Par     Number of  $0.001 Par  

Shares

 —   $

Value

    Shares
 —    18,633   $

Value

Paid-In   Accumulated  Comprehensive  Stockholders’
Capital

(Loss)/Income  

Equity

Deficit

18   $ 641,818   $ (538,470)  $

(17)  $ 103,349

(In thousands, except per share amounts)
Balance, December 31, 2016
Cumulative effect from adoption of new
accounting standard (Note 2)
Sale of common stock, net of issuance
costs
Issuance of common stock under
employee stock purchase plan
Exercise of common stock options and
warrants
Issuance of common stock for services
Stock-based compensation
Unrealized gain on marketable securities  
Net loss
Balance, December 31, 2017
Issuance of common stock under
employee stock purchase plan
Issuance of common stock upon exercise
of common stock options and warrants
Issuance of common stock for services
rendered
Stock-based compensation
Net loss
Balance, December 31, 2018
Sale of common stock, net of issuance
costs
Sale of redeemable convertible preferred
stock
Deemed dividend related to December
2019 Private Placement (Note 7)
Issuance of commitment shares (Note 8)  
Issuance of common stock under
employee stock purchase plan
Issuance of common stock upon exercise
of warrants
Issuance of common stock for services
rendered
Stock-based compensation expense
Net loss
Balance, December 31, 2019

 —    

 —   

 —    

 —    

40    

(40)   

 —    

 —

 —    

 —   

4,792    

 5    

53,741    

 —    

 —    

53,746

 —    

 —   

22    

 —    

253    

 —    

 —    

253

 —    
 —    
 —    
 —    
 —    
 —   $

996    
 —   
10    
 —   
 —    
 —   
 —    
 —   
 —   
 —    
 —    24,453   $

 —    
5,443    
 1    
 —    
150    
 —    
 —    
10,720    
 —    
 —    
 —    
 —    
 —    
(65,984)   
 —    
24   $ 712,165   $ (604,494)  $

5,444
 —    
150
 —    
10,720
 —    
17
17    
 —    
(65,984)
 —   $ 107,695

 —    

 —   

25    

 —    

243    

 —    

 —    

243

 —    

 —   

2,702    

 3    

10,163    

 —    

 —    

10,166

 —    
 —    
 —    
 —   $

 8    
 —   
 —    
 —   
 —   
 —    
 —    27,188   $

 —    
97    
 —    
 —    
5,674    
 —    
 —    
(59,881)   
 —    
27   $ 728,342   $ (664,375)  $

 —    
 —    
 —    
 —   $

97
5,674
(59,881)
63,994

 —    

 —   

2,068    

 3    

5,295    

 —    

 —    

5,298

23,684    

 —   

 —    

 —    

 —    

 —    

 —    

 —

 —    
 —    

 —   
 —   

 —    
270    

 —    
 —    

(28,043)   
 —    

 —    
 —    

 —    
 —    

(28,043)
 —

 —    

 —   

61    

 —    

121    

 —    

 —    

121

 —    

 —   

38    

 —    

 3    

 —    

 —    

 3

 —    
 —    
 —    
23,684   $

47    
 —   
 —    
 —   
 —   
 —    
 —    29,672   $

 —    
129    
 —    
 —    
3,845    
 —    
 —    
(56,515)   
 —    
30   $ 709,692   $ (720,890)  $

129
 —    
3,845
 —    
 —    
(56,515)
 —   $ (11,168)

The accompanying notes are an integral part of these financial statements. 

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Table of Contents

IDERA PHARMACEUTICALS, INC.
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:

Stock-based compensation
Warrant liability revaluation expense
Future tranche right liability revaluation expense
Issuance of common stock for services rendered
Accretion of discounts and premiums on investments
Depreciation and amortization expense
(Gain) Loss on disposal or impairment of property and equipment

Changes in operating assets and liabilities:

Prepaid expenses and other assets
Accounts payable, accrued expenses, and other liabilities
Deferred revenue
Other

Net cash used in operating activities

Cash Flows from Investing Activities:
Purchases of available-for-sale securities
Proceeds from maturity of available-for-sale securities
Proceeds from the sale of property and equipment
Purchases of property and equipment

Net cash (used in) provided by investing activities

Cash Flows from Financing Activities:
Proceeds from private placement
Proceeds from common stock financings, net
Proceeds from employee stock purchases
Proceeds from exercise of common stock options and warrants
Payments on note payable
Payments on capital leases

Net cash provided by financing activities

Net (decrease) increase in cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash, beginning of period
Cash, cash equivalents and restricted cash, end of period

Supplemental disclosure of cash flow information:

Cash paid for interest
Increase to right-of-use asset at adoption of ASC 842 and upon lease
 $
reassessment
Increase to lease liability at adoption of ASC 842 and upon lease reassessment  $

 $

Supplemental disclosure of non-cash financing and investing activities:

Non-cash property additions
Accrued financing transaction costs

 $
 $

 —   $
165   $

The accompanying notes are an integral part of these financial statements.

F-6

Year Ended December 31, 
2018

2017

2019

 $ (56,515)  $

(59,881)  $

(65,984) 

3,845  
598  
10,964  
129  
(372) 
120  
(10) 

(2,160) 
(1,105) 
 —  
 8  
(44,498) 

(44,502) 
42,100  
11  
(11) 
(2,402) 

5,674  
 —  
 —  
97  
 —  
432  
477  

2,717  
(866) 
(566) 
 —  
(51,916) 

 —  
 —  
290  
(75) 
215  

10,072  
5,298  
121  
 3  
 —  
(6) 
15,488  
(31,412) 
71,431  
40,019   $

 —  
 —  
243  
10,166  
(209) 
(8) 
10,192  
(41,509) 
112,940  
71,431   $

 $

 —   $

 9   $

1,236   $
1,236   $

 —   $
 —   $

 —   $
101   $

10,720  
 —  
 —  
150  
94  
746  
 —  

(1,962) 
1,674  
(697) 
 —  
(55,259) 

 —  
28,270  
 —  
(206) 
28,064  

 —  
53,763  
253  
5,444  
(292) 
(11) 
59,157  
31,962  
80,978  
112,940  

42  

 —  
 —  

150  
17  

 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
    
    
 
    
 
   
 
   
 
    
 
   
 
   
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
    
 
   
 
   
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
 
  
  
 
  
 
  
    
 
   
 
   
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
 
  
  
 
  
 
  
    
 
   
 
   
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
  
 
 
 
    
 
   
 
   
 
    
 
   
 
   
 
    
 
   
 
   
 
 
    
 
   
 
   
 
 
 
 
Table of Contents

Note 1.  Business and Organization

Business Overview

IDERA PHARMACEUTICALS, INC.

NOTES TO FINANCIAL STATEMENTS
December 31, 2019

Idera Pharmaceuticals, Inc. (“Idera” or the “Company”), a Delaware corporation, is a clinical-stage

biopharmaceutical company with a business strategy focused on the clinical development, and ultimately the
commercialization, of drug candidates for both oncology and rare disease indications characterized by small, well-defined
patient populations with serious unmet medical needs. The Company’s current focus is on its Toll-like receptor, or TLR,
agonist, tilsotolimod (IMO-2125), for oncology. The Company believes it can develop and commercialize targeted
therapies on its own.  To the extent the Company seeks to develop drug candidates for broader disease indications, it has
entered into and may explore additional collaborative alliances to support development and commercialization. 

Liquidity and Financial Condition

As of December 31, 2019, the Company had an accumulated deficit of $720.9 million and a cash, cash equivalents
and short-term investments balance of $42.8 million, which includes the $6.2 million contingently refundable option fee
received in connection with the 2019 Private Placement, as more fully described in Note 7. The Company expects to incur
substantial operating losses in future periods and will require additional capital as it seeks to advance tilsotolimod and any
future drug candidates through development to commercialization. The Company does not expect to generate product
revenue, sales-based milestones or royalties until the Company successfully completes development of and obtains
marketing approval for tilsotolimod or other future drug candidates, either alone or in collaboration with third parties,
which the Company expects will take a number of years. In order to commercialize tilsotolimod and any future drug
candidates, the Company needs to complete clinical development and comply with comprehensive regulatory requirements.
The Company is subject to a number of risks and uncertainties similar to those of other companies of the same size within
the biotechnology industry, such as uncertainty of clinical trial outcomes, uncertainty of additional funding and history of
operating losses.

The Company believes, based on management’s current operating plan, that its existing balance of cash, cash

equivalents and short-term investments on hand as of December 31, 2019, excluding the $6.2 million contingently
refundable Option Fee (Note 7) and including interest income and cash received through February 2020 from the ATM
Agreement (Note 8) and the LPC Purchase Agreement (Note 8), will be sufficient to fund operations into the first quarter of
2021. Management’s operating plan which underlies the analysis of the Company’s ability to continue as a going concern
involves the estimation of the amount and timing of future cash inflows and outflows. Actual results could vary from the
operating plan. The Company follows the provisions of Financial Accounting Standards Board (“FASB”) Accounting
Standards Codification (“ASC”) Topic 205-40, Presentation of Financial Statements—Going Concern, which requires
management to assess the Company’s ability to continue as a going concern within one year after the date the financial
statements are issued. The Company’s balance of cash, cash equivalents and short-term investments on hand as of
December 31, 2019, excluding the $6.2 million contingently refundable option fee (Note 7), is not sufficient to fund
operations for the one-year period after the date the financial statements are issued. As a result, there is substantial doubt
about the Company’s ability to continue as a going concern through the one-year period from the date these financial
statements are issued. Management’s plans that are intended to mitigate this risk include raising additional capital through
the Company’s December 2019 Securities Purchase Agreement (Note 7), Common Stock Purchase Agreement (Note 8),
“At-The-Market” Equity Program (Note 8), or additional financing or strategic transactions.  Management’s plans may also
include the possible deferral of certain operating expenses unless additional capital is received. The Company has and will
continue to evaluate available alternatives to extend its operations beyond the one-year period after the date the financial
statements are issued.

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Table of Contents

Note 1.  Business and Organization (Continued)

Reverse Stock Split

As further described in Note 8, on July 27, 2018, the Company effected a 1-for-8 reverse stock split of the
Company's outstanding shares of common stock, as authorized at a special meeting. All share and per share amounts of
common stock, preferred stock, options and warrants in the accompanying financial statements and notes thereto have been
retroactively adjusted for all periods presented to reflect the reverse stock split.

Note 2.  Summary of Significant Accounting Policies

Basis of Presentation

The accompanying financial statements have been prepared in accordance with U.S. generally accepted accounting

principles (“GAAP”).

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates,

judgements, and assumptions that affect the reported amounts of assets, liabilities, equity, revenues and expenses, and
related disclosure of contingencies in the accompanying financial statements and these notes.  In addition, management’s
assessment of the Company’s ability to continue as a going concern involves the estimation of the amount and timing of
future cash inflows and outflows.  On an ongoing basis, the Company evaluates its estimates, judgments and
methodologies.  The Company bases its estimates on historical experience and on various other assumptions that are
believed to be reasonable.  Actual results could differ materially from those estimates.

Segment Information

Operating segments are defined as components of an enterprise in which separate discrete information is available
for evaluation by the chief operating decision maker, or decision-making group, in deciding how to allocate resources and
assessing performance. The Company views its operations and manages its business as one operating segment, which is the
business of developing novel therapeutics for oncology and rare diseases.

Financial Instruments

The fair value of the Company’s financial instruments is determined and disclosed in accordance with the three-tier

fair value hierarchy specified in Note 3. The Company is required to disclose the estimated fair values of its financial
instruments. As of December 31, 2019 and 2018, the Company’s financial instruments consisted of cash, cash equivalents,
short-term investments, receivables, and warrant and future tranche right liabilities. The estimated fair values of these
financial instruments approximate their carrying values as of December 31, 2019 and 2018.  As of December 31, 2019, the
Company did not have any other derivatives, hedging instruments or other similar financial instruments.

Concentration of Credit Risk

Financial instruments that subject the Company to credit risk primarily consist of cash, cash equivalents and
investments. The Company’s credit risk is managed by investing in highly rated money market instruments, certificates of
deposit, corporate bonds, commercial paper and debt securities. Due to these factors, no significant additional credit risk is
believed by management to be inherent in the Company’s assets. As of December 31, 2019, all of the Company’s cash and
cash equivalents were held at two financial institutions.

Cash and Cash Equivalents

The Company considers all highly liquid investments with maturities of 90 days or less when purchased to be “cash

equivalents.” Cash and cash equivalents at December 31, 2019 and 2018 consisted of cash and money market funds.

F-8

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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Note 2.  Summary of Significant Accounting Policies (Continued)

Property and Equipment

Property and equipment is carried at acquisition cost less accumulated depreciation, subject to review for impairment

whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable as
described further under the heading "Impairment of Long-Lived Assets" below. The cost of normal, recurring, or periodic
repairs and maintenance activities related to property and equipment are expensed as incurred. The cost for planned major
maintenance activities, including the related acquisition or construction of assets, is capitalized if the repair will result in
future economic benefits.

Depreciation and amortization are computed using the straight-line method based on the estimated useful lives of the

related assets. Laboratory and other equipment are depreciated over three to five years. Leasehold improvements are
amortized over the remaining lease term or the related useful life, if shorter.

When an asset is disposed of, the associated cost and accumulated depreciation is removed from the related accounts

on the Company's balance sheet with any resulting gain or loss included in the Company's statement of operations.

Operating Lease Right-of-use Asset and Lease Liability

The Company accounts for leases under ASC Topic 842, Leases. The Company determines if an arrangement is a

lease at inception. Operating leases are included in long-term right-of-use assets and current and long-term lease liabilities
within the Company’s balance sheets. Right-of-use (“ROU”) assets represent the Company’s right to use an underlying
asset for the lease term and lease liabilities represent the Company’s obligation to make lease payments arising from the
lease. Operating lease right-of-use assets and liabilities are recognized at commencement date based on the present value of
lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, the Company uses its
incremental borrowing rates, which are the rates incurred to borrow on a collateralized basis over a similar term, an amount
equal to the lease payments in a similar economic environment. Lease expense for lease payments is recognized on a
straight-line basis over the lease term. The right-of-use assets are tested for impairment according to ASC 360. Leases with
an initial term of 12 months or less are not recorded on the balance sheet and are recognized as lease expense on a straight-
line basis over the lease term. 

In December 2019, the Company determined it was reasonably certain that it would exercise its five-year renewal

option to extend its Exton, PA office lease, which was scheduled to expired in May 2020. As a result of this determination,
the renewal option was included in the lease term and the Company recorded an incremental ROU asset and lease liability
of $1.0 million as of December 31, 2019, the date this determination was made. Subsequently, in January 2020, the
Company exercised its option to renew and extend the lease term for a period of five years from June 1, 2020 through May
31, 2025.

Impairment of Long-Lived Assets

In accordance with ASC 360-10-35, Impairment or Disposal of Long-Lived Assets, the Company reviews its long-

lived assets and identifiable finite-lived intangible assets for impairment whenever events or changes in circumstances
indicate that the carrying amount of an asset may not be recoverable (i.e. impaired). Once an impairment is determined, the
actual impairment recognized is the difference between the carrying amount and the fair value (less costs to sell for assets
to be disposed of) as estimated using one of the following approaches: income, cost and/or market. Fair value using the
income approach is determined primarily using a discounted cash flow model that uses the estimated cash flows associated
with the asset or asset group under review, discounted at a rate commensurate with the risk involved. Fair value utilizing
the cost approach is determined based on the replacement cost of the asset reduced for, among other things, depreciation
and obsolescence. Fair value, utilizing the market approach, benchmarks the fair value against the carrying amount.

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Note 2.  Summary of Significant Accounting Policies (Continued)

Warrant Liability

The Company accounts for stock warrants as either equity instruments, liabilities or derivative liabilities in

accordance with ASC 480, Distinguishing Liabilities from Equity (ASC 480) and/or ASC 815, Derivatives and
Hedging (ASC 815), depending on the specific terms of the warrant agreement. Freestanding warrants for shares that are
potentially redeemable, whereby the Company may be required to transfer assets (e.g. cash or other assets) outside of its
control, are classified as liabilities. Liability-classified warrants are recorded at their estimated fair values at each reporting
period until they are exercised, terminated, reclassified or otherwise settled. Changes in the estimated fair value of liability-
classified warrants are recorded in Warrant Revaluation Income (Expense) in the Company’s statements of operations and
comprehensive loss. Equity classified warrants are recorded within additional paid-in capital at the time of issuance and not
subject to remeasurement. For additional discussion on warrants, see Note 8.

Future Tranche Right Liability

In connection with the Company’s 2019 Private Placement, as more fully described in Note 7, the Company entered

into the December 2019 Securities Purchase Agreement, which contains call options on redeemable preferred shares with
warrants (conditionally exercisable for shares that are puttable). The Company determined that these call options represent
freestanding financial instruments and accounts for the options as a liabilities (“Future Tranche Right Liability”) under
ASC 480, which requires the measurement of the fair value of the liability at the time of issuance and recording changes as
a charge to current earnings at each reporting period, which is included in Future Tranche Right Liability Revaluation
Expense in the Company’s statements of operations and comprehensive loss.

Preferred Stock

The Company applies ASC 480 when determining the classification and measurement of its preferred stock.

Preferred shares subject to mandatory redemption are classified as liability instruments and are measured at fair value.
Conditionally redeemable preferred shares (including preferred shares that feature redemption rights that are either within
the control of the holder or subject to redemption upon the occurrence of uncertain events not solely within the Company’s
control) are classified as temporary equity. At all other times, preferred shares are classified as stockholders’ equity.

Accretion of redeemable convertible preferred stock includes the accretion of the Company's Series B redeemable

convertible preferred stock to its stated value. The carrying value of the Series B redeemable convertible preferred stock is
being accreted to redemption value using the effective interest method, from the date of issuance to the earliest date the
holders can demand redemption.

Redeemable Preferred Stock Issued with Other Freestanding Instruments

The Company considers guidance within ASC 470-20, Debt (ASC 470), ASC 480, and ASC 815 when accounting
for a redeemable equity instrument issued with other freestanding instruments (e.g. detachable warrants and future tranche
right liabilities), such as in the December 2019 Private Placement. In circumstances in which redeemable convertible
preferred stock is issued with freestanding liability-classified instruments, the proceeds from the issuance of the convertible
preferred stock are first allocated to those instruments at their full estimated fair value. The remaining proceeds, as further
reduced by discounts created by the bifurcation of embedded derivatives and/or beneficial conversion features, if any, are
allocated to the redeemable equity instrument.

See Note 7 for additional discussion on the Company’s accounting for the 2019 Private Placement.

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Note 2.  Summary of Significant Accounting Policies (Continued)

Revenue Recognition

The Company recognizes revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers

(“ASC 606’), which applies to all contracts with customers, except for contracts that are within the scope of other
standards, such as leases, insurance, collaboration arrangements and financial instruments. In accordance with ASC 606,
the Company recognizes revenue when its customer obtains control of promised goods or services, in an amount that
reflects the consideration which the entity expects to receive in exchange for those goods or services. To determine revenue
recognition for arrangements that the Company determines are within the scope of ASC Topic 606, it performs the
following five steps:

(i)

identify the contract(s) with a customer;

(ii) identify the performance obligations in the contract;

(iii) determine the transaction price;

(iv) allocate the transaction price to the performance obligations in the contract; and

(v) recognize revenue when (or as) the entity satisfies a performance obligation.

The Company only applies the five-step model to contracts when it determines that it is probable it will collect the

consideration to which it is entitled in exchange for the goods or services it transfers to the customer. At contract inception,
once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised
within each contract and determines those that are performance obligations, and assesses whether each promised good or
service is distinct. The Company then recognizes as revenue the amount of the transaction price that is allocated to the
respective performance obligation when (or as) the performance obligation is satisfied.

Amounts received prior to satisfying the revenue recognition criteria are recognized as deferred revenue in the
Company’s balance sheet.  Amounts expected to be recognized as revenue within the 12 months following the balance
sheet date are classified as current portion of deferred revenue.  Amounts not expected to be recognized as revenue within
the 12 months following the balance sheet date are classified as deferred revenue, net of current portion.

Alliance Revenues

The Company’s revenues have primarily been generated through collaborative research, development and/or
commercialization agreements.  The terms of these agreements may include payment to the Company of one or more of the
following: nonrefundable, up-front license fees; research, development and commercial milestone payments; and other
contingent payments due based on the activities of the counterparty or the reimbursement by licensees of costs associated
with patent maintenance.  Each of these types of revenue are recorded as Alliance revenues in the Company’s statements of
operations.

In determining the appropriate amount of revenue to be recognized as it fulfills its obligations under each of its

agreements, the Company performs the following steps:

(i)

identification of the promised goods or services in the contract;

(ii) determination of whether the promised goods or services are performance obligations including whether they

are distinct in the context of the contract;

(iii) measurement of the transaction price, including the constraint on variable consideration;

(iv) allocation of the transaction price to the performance obligations; and

(v) recognition of revenue when (or as) the Company satisfies each performance obligation.

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Note 2.  Summary of Significant Accounting Policies (Continued)

See Note 10, “Collaboration and License Agreements” for additional details regarding the Company’s collaboration

arrangements.

As part of the accounting for these arrangements, the Company allocates the transaction price to each performance

obligation on a relative stand-alone selling price basis. The stand-alone selling price may be, but is not presumed to be, the
contract price. In determining the allocation, the Company maximizes the use of observable inputs.  When the stand-alone
selling price of a good or service is not directly observable, the Company estimates the stand-alone selling price for each
performance obligation using assumptions that require judgment. Acceptable estimation methods include, but are not
limited to: (i) the adjusted market assessment approach, (ii) the expected cost plus margin approach, and (iii) the residual
approach (when the stand-alone selling price is not directly observable and is either highly variable or uncertain). In order
for the residual approach to be used, the Company must demonstrate that (a) there are observable stand-alone selling prices
for one or more of the performance obligations and (b) one of the two criteria in ASC 606-10-32-34(c)(1) and (2) is met.
The residual approach cannot be used if it would result in a stand-alone selling price of zero for a performance obligation as
a performance obligation, by definition, has value on a stand-alone basis.

An option in a contract to acquire additional goods or services gives rise to a performance obligation only if the
option provides a material right to the customer that it would not receive without entering into that contract. Factors that the
Company considers in evaluating whether an option represents a material right include, but are not limited to: (i) the overall
objective of the arrangement, (ii) the benefit the collaborator might obtain from the arrangement without exercising the
option, (iii) the cost to exercise the option (e.g. priced at a significant and incremental discount) and (iv) the likelihood that
the option will be exercised. With respect to options determined to be performance obligations, the Company recognizes
revenue when those future goods or services are transferred or when the options expire.

The Company’s revenue arrangements may include the following:

Up-front License Fees: If a license is determined to be distinct from the other performance obligations identified in

the arrangement, the Company recognizes revenues from nonrefundable, up-front fees 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 utilizes 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, the
appropriate method of measuring progress for purposes of recognizing revenue from non-refundable, up-front fees. The
Company evaluates the measure of progress each reporting period and, if necessary, adjusts the measure of performance
and related revenue recognition.

Milestone Payments: At the inception of an agreement that includes research and development milestone payments,

the Company evaluates whether each milestone is considered probable of being achieved and estimates 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
the control of the Company or the licensee, such as regulatory approvals, are 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 such milestones and any related constraint, and if necessary, adjusts its estimate of the overall transaction
price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect Alliance revenues and
earnings in the period of adjustment.

Research and Development Activities: If the Company is entitled to reimbursement from its collaborators for
specified research and development activities or the reimbursement of costs associated with patent maintenance, the
Company determines whether such funding would result in Alliance revenues or an offset to research and development
expenses. Reimbursement of patent maintenance costs are recognized during the period in which the related expenses are
incurred as Alliance revenues in the Company’s statements of operations.

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Note 2.  Summary of Significant Accounting Policies (Continued)

Royalties: If the Company is entitled to receive sales-based royalties from its collaborator, including milestone
payments based on the level of sales, and 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, provided the reported sales are reliably
measurable, 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, the Company has not recognized any royalty revenue resulting from any of its
collaboration and license arrangements.

Manufacturing Supply and Research Services: Arrangements that include a promise for future supply of drug
substance, drug product or research services at the licensee’s discretion are generally considered as options. The Company
assesses if these options provide a material right to the licensee and if so, they are accounted for as separate performance
obligations. If the Company is entitled to additional payments when the licensee exercises these options, any additional
payments are recorded in Alliance revenues when the licensee obtains control of the goods, which is upon delivery, or as
the services are performed.

The Company receives payments from its licensees based on schedules established in each contract. Upfront

payments and fees are recorded as deferred revenue upon receipt, and may require deferral of revenue recognition to a
future period until the Company performs its obligations under these arrangements. Amounts are recorded as accounts
receivable when the Company’s right to consideration is unconditional. The Company does not assess whether a contract
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.

Research and Development Expenses

All research and development expenses are expensed as incurred. Research and development expenses are
comprised of costs incurred in performing research and development activities, including drug development trials and
studies, drug manufacturing, laboratory supplies, external research, payroll including stock-based compensation and
overhead. Nonrefundable advance payments for goods or services to be received in the future for use in research and
development activities are deferred and capitalized. The capitalized amounts are expensed as the related goods are accepted
by the Company or the services are performed. As of December 31, 2019 and 2018, the Company recorded approximately
$2.8 million and $0.6 million as prepaid research and development, respectively, which is included within prepaid expenses
and other current assets in the accompanying balance sheets.

Stock-Based Compensation

The Company accounts for stock-based compensation using ASC 718, Compensation – Stock Compensation (“ASC

718”), or ASC 505-50, Equity – Equity Based Payments to Non-Employees, as applicable. The Company accounts for
stock-based awards to employees and non-employee directors using the fair value based method to determine compensation
expense for all arrangements where shares of stock or equity instruments are issued for compensation. In addition, the
Company accounts for stock-based compensation to other non-employees in accordance with the accounting guidance for
equity instruments that are issued to entities or persons other than employees.

The Company recognizes all share-based payments to employees and directors as expense in the statements of

operations and comprehensive loss based on their fair values. The Company records compensation expense on a straight-
line basis over an award’s requisite service period, or vesting period, based on the award’s fair value at the date of grant.
Vesting is generally four years for employees and one year for directors. The Company uses a Black-Scholes option-pricing
model to determine the fair value of each option grant as of the date of grant for expense incurred. The Black-Scholes
option pricing model requires inputs for risk-free interest rate, dividend yield, expected stock price volatility and expected
term of the options. See Note 12, “Stock-based Compensation” for additional details.

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Note 2.  Summary of Significant Accounting Policies (Continued)

Prior to the adoption of Accounting Standards Update (“ASU”) 2016-09, Compensation - Stock Compensation
(Topic 718): Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”), ASC 718 required forfeitures
to be estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differed from those
estimates. However, ASU 2016-09 allows an entity to elect as an accounting policy upon adoption either to continue to
estimate the total number of awards for which the requisite service period will not be rendered or to account for forfeitures
when they occur. In connection with the adoption of this ASU in the first quarter of 2017, the Company made an
accounting policy election to account for forfeitures as they occur and applied this change in accounting policy on a
modified retrospective basis, resulting in less than a $0.1 million reduction in Additional paid-in capital and an increase in
Accumulated deficit as of January 1, 2017, to reflect the cumulative effect of previously estimated forfeitures. See the
caption “Cumulative effect from adoption of new accounting standard” within the accompanying statements of redeemable
preferred stock and stockholders’ equity (deficit).

Merger-related Costs, net

On January 21, 2018, the Company, BioCryst Pharmaceuticals, Inc., a Delaware corporation (“BioCryst”), Nautilus

Holdco, Inc., a Delaware corporation and a direct, wholly owned subsidiary of BioCryst (“Holdco”), Island Merger
Sub, Inc., a Delaware corporation and a direct, wholly owned subsidiary of Holdco, and Boat Merger Sub, Inc., a Delaware
corporation and a direct, wholly owned subsidiary of Holdco, entered into an Agreement and Plan of Merger (the “Merger
Agreement”). The board of directors of each of Idera and BioCryst unanimously approved the Merger Agreement and the
transactions contemplated thereby and the required regulatory approvals were received. However, the proposed merger was
subject to approval by the stockholders of Idera and BioCryst, and satisfaction of other customary closing conditions, as
specified in the Merger Agreement. At a special meeting of BioCryst stockholders held on July 10, 2018, BioCryst’s
stockholders voted against the adoption of the Merger Agreement. Following such vote and in accordance with the terms of
the Merger Agreement, BioCryst terminated the Merger Agreement. In accordance with the Merger Agreement, BioCryst
paid the Company a fixed expense reimbursement amount of $6 million in July 2018 in connection with the termination of
the Merger Agreement. The fixed expense reimbursement amount is included in “Merger-related costs, net” in the
accompanying statements of operations. 

Merger-related costs, net includes amounts related to the transactions contemplated under the Merger Agreement,
including charges incurred for transaction and integration-related professional fees, employee retention costs, and other
incremental costs directly related to the potential merger; less the $6 million fixed expense reimbursement termination fee,
which was received by the Company in July 2018.

Restructuring Costs

Restructuring charges are primarily comprised of severance costs related to workforce reductions, contract
termination and wind-down costs and asset impairments. In accordance with ASC 420, Exit or Disposal Cost Obligations,
the Company recognizes restructuring charges when the liability has been incurred, except for one-time employee
termination benefits that are incurred over time. Generally, one-time employee termination benefits (i.e. severance costs)
are accrued at the date management has committed to a plan of termination and employees have been notified of their
termination dates and expected severance payments. Other costs will be recorded as incurred. Asset impairment charges
have been, and will be, recognized when management has concluded that the assets have been impaired in accordance with
ASC 360-10-35, Impairment or Disposal of Long-Lived Assets, or other applicable authoritative guidance. See Note 11 for
additional details.

Income Taxes

An asset and liability approach is used for financial accounting and reporting for income taxes. Deferred income

taxes arise from temporary differences between income tax and financial reporting and principally relate to recognition of
revenue and expenses in different periods for financial and tax accounting purposes and are measured using currently
enacted tax rates and laws.  In addition, a deferred tax asset can be generated by a net operating loss carryover.  If it is more
likely than not that some portion or all of a deferred tax asset will not be realized, a valuation allowance is recognized.

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Note 2.  Summary of Significant Accounting Policies (Continued)

In the event the Company is charged interest or penalties related to income tax matters, the Company would record

such interest as interest expense and would record such penalties as other expense in the Statements of Operations.  No
such charges have been incurred by the Company.  For each of the years ended December 31, 2019, 2018 and 2017, the
Company had no uncertain tax positions.  See Note 14, “Income Taxes” for additional details.

Net Loss per Common Share applicable to Common Stockholders

Basic and diluted net loss per common share applicable to common stockholders is computed using the weighted

average number of shares of common stock outstanding during the period. The diluted loss per share calculation gives
effect to dilutive stock options, warrants, convertible preferred stock and other potentially dilutive common stock
equivalents outstanding during the period. Diluted loss per share is based on the if-converted method or the treasury stock
method, as applicable, and includes the effect from the potential issuance of common stock, such as shares issuable
pursuant to the conversion of convertible preferred stock and the exercise of stock options and warrants, assuming the
exercise of all “in-the-money” common stock equivalents based on the average market price during the period. Common
stock equivalents have been excluded where their inclusion would be anti-dilutive. Diluted net loss per common share
applicable to common stockholders is the same as basic net loss per common share applicable to common stockholders for
each of the three years in the period ended December 31, 2019 as the effects of the Company’s potential common stock
equivalents are antidilutive (see Note 17).

Comprehensive Income (Loss)

Comprehensive income (loss) is defined as the change in equity of a business enterprise during a period from
transactions and other events and circumstances from non-owner sources. Comprehensive income (loss) for the years ended
December 31, 2019, 2018 and 2017 is comprised of reported net income (loss) and any change in net unrealized gains and
losses on investments in available-for-sale securities during each year, which is included in “Accumulated other
comprehensive income” on the accompanying balance sheets. In accordance with ASC Topic 220, Comprehensive Income,
the Company has elected to present the components of net income and other comprehensive income as one continuous
statement.

New Accounting Pronouncements

Recently Adopted Accounting Pronouncements

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”).  ASU 2016-02

requires organizations that lease assets, with lease terms of more than 12 months, to recognize on the balance sheet the
assets and liabilities for the rights and obligations created by those leases. Consistent with GAAP, the recognition,
measurement and presentation of expenses and cash flows arising from a lease by a lessee will depend primarily on its
classification as a finance or operating lease. However, unlike the previous standard, which required only capital leases to
be recognized on the balance sheet, ASU 2016-02 requires both types of leases to be recognized on the balance sheet. This
guidance was applicable to the Company's fiscal year beginning January 1, 2019, and the Company adopted ASU 2016-02
in the first quarter of 2019 using the alternative modified retrospective transition method, which allowed the Company to
apply the new lease standard to the beginning of the 2019 period and did not require adjusting comparative period financial
information.  Additionally, the Company elected the package of practical expedients to not reassess prior conclusions
related to contracts containing leases, lease classification and initial direct costs. As a result of adopting ASU 2016-02, the
primary impact on the Company’s financial statements was the recognition of a right-of-use asset and corresponding
liability of approximately $0.3 million on its balance sheet as of January 1, 2019 related to its existing Exton, PA facility
operating lease.

In June 2018, the FASB issued ASU No. 2018-07, Compensation – Stock Compensation (Topic 718) (“ASU 2018-
07”).  ASU 2018-07 simplifies the accounting for nonemployee share-based payment transactions and was adopted by the
Company in the first quarter of 2019.  The adoption of this ASU did not have a material impact on the Company’s financial
statements.

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Note 2.  Summary of Significant Accounting Policies (Continued)

Recently Issued (Not Yet Adopted) Accounting Pronouncements

In June 2016 the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement

of Credit Losses on Financial Instruments. This standard requires that credit losses be reported using an expected losses
model rather than the incurred losses model that is currently used, and establishes additional disclosures related to credit
risks. For available-for-sale debt securities with unrealized losses, this standard now requires allowances to be recorded
instead of reducing the amortized cost of the investment. This standard will be effective for the Company on January 1,
2020. The Company is currently evaluating the potential impact that this standard may have on our financial position and
results of operations but does not expect the impact of this standard to be material.

In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework - Changes to the Disclosure
Requirements for Fair Value Measurement (“ASU 2018-13”), which amends ASC 820, Fair Value Measurement. ASU
2018-13 modifies the disclosure requirements for fair value measurements by removing, modifying, or adding certain
disclosures. The ASU is effective for annual periods, including interim periods within those annual periods, beginning after
December 15, 2019, with early adoption permitted for removed or modified disclosures, and delayed adoption of the
additional disclosures until their effective date. The Company is currently evaluating the effect that the ASU will have on
its financial statements and related disclosures but does not expect the impact of this amendment to be material.

Note 3.  Fair Value Measurements

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The Company applies the guidance in ASC 820, Fair Value Measurement, to account for financial assets and
liabilities measured on a recurring basis.  Fair value is measured at the price that would be received to sell an asset or paid
to transfer a liability in an orderly transaction between market participants at the measurement date. As such, fair value is a
market-based measurement that is determined based on assumptions that market participants would use in pricing an asset
or liability.

The Company uses a fair value hierarchy, which distinguishes between assumptions based on market data
(observable inputs) and an entity's own assumptions (unobservable inputs). The guidance requires that fair value
measurements be classified and disclosed in one of the following three categories:

·

·

·

Level 1: Unadjusted quoted prices in active markets that are accessible at the measurement date for identical,
unrestricted assets or liabilities;

Level 2: Quoted prices in markets that are not active or inputs which are observable, either directly or indirectly,
for substantially the full term of the asset or liability;

Level 3: Prices or valuation techniques that require inputs that are both significant to the fair value measurement
and unobservable (i.e., supported by little or no market activity). 

Determining which category an asset or liability falls within the hierarchy requires significant judgment. The

Company evaluates its hierarchy disclosures each reporting period. There were no transfers between Level 1,  2 and 3
during the years ended December 31,  2019,  2018 and 2017.

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Note 3.  Fair Value Measurements (Continued)

The table below presents the assets and liabilities measured and recorded in the financial statements at fair value on
a recurring basis at December 31, 2019 and 2018 categorized by the level of inputs used in the valuation of each asset and
liability.

(In thousands)
Assets
Cash
Money market funds
Short-term investments – commercial paper

Total assets

Liabilities

Warrant liability
Future tranche right liability

Total liabilities

(In thousands)
Assets
Cash
Money market funds
Other cash equivalents – commercial paper

Total assets
Total liabilities

Total

December 31, 2019

Level 1

Level 2

Level 3

  $

  $

  $

  $

250   $

39,769  
2,774  
42,793   $

250   $

39,769  
 —  
40,019   $

 —   $
 —  
2,774  
2,774   $

 —  
 —  
 —  
 —  

3,241   $
46,436  
49,677   $

 —   $
 —  
 —   $

 —   $
 —  
 —   $

3,241  
46,436  
49,677  

December 31, 2018

Total

Level 1

Level 2

Level 3

  $

  $
  $

8,446   $
61,177  
1,808  
71,431   $
—   $

8,446   $
61,177  
 —  
69,623   $
—   $

 —   $
 —  
1,808  
1,808   $
—   $

 —  
 —  
 —  
 —  
—  

The Level 1 assets consist of money market funds, which are actively traded daily. The Level 2 assets consist of

commercial paper whose fair value may not represent actual transactions of identical securities. The fair value of
commercial paper is generally determined based on the relationship between the investment’s discount rate and the
discount rates of the same issuer’s commercial paper available in the market which may not be actively traded daily. Since
these fair values may not be based upon actual transactions of identical securities, they are classified as Level 2.

Changes in Level 3 Liabilities Measured at Fair Value on a Recurring Basis

Warrant Liability and Future Tranche Right Liability

The reconciliation of the Company's warrant and future tranche right liability measured at fair value on a recurring

basis using unobservable inputs (Level 3) is as follows:

(In thousands)
Balance at December 31, 2018

Issuance of redeemable preferred stock and warrants 
Change in the fair value of liability

(1)

Balance at December 31, 2019

Warrant

Liability

Derivative

Liability

 —  
2,643  
598  
3,241  

$

$

 —
35,472
10,964
46,436

$

$

(1) Represents fair value of freestanding warrants and the future tranche right related to the December 2019 Private Placement

on the issuance date.

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Note 3.  Fair Value Measurements (Continued)

Assumptions Used in Determining Fair Value of Liability-Classified Warrants

The Company utilizes an option pricing model to value its liability-classified warrants. Inherent in the valuation

model are assumptions related to volatility, risk-free interest rate, expected term, dividend rate, and other scenarios (i.e.
probability of complex features of the warrants being triggered).   

The fair value of the warrants has been estimated with the following weighted-average assumptions:

Risk-free interest rate
Expected dividend yield
Expected term (years)
Expected volatility
Exercise price (per share)

December 23,
2019

December 31,
2019

1.82%  
 —  
7.00  
80%  
1.52  

$

1.79%
 —
6.98
80%
1.52

$

Assumptions Used in Determining Fair Value of Future Tranche Rights

The Company utilizes a binomial lattice model to value the Series B2 (tranche 2) and B3 (tranche 3) tranches  and a
Monte Carlo simulation to value the Series B4 (tranche 4) future tranche rights. The Company selected these models as it
believes they are reflective of all significant assumptions that market participants would likely consider in negotiating the
transfer of the Future Tranche Rights. Such assumptions include, among other inputs, stock price volatility, risk-free rates,
redemption and early exercise assumptions, cancellation and conversion assumptions, and the potential for future
adjustment of the conversion price due to a future dilutive financing.

The estimated fair value of the Future Tranche Rights is determined using Level 2 and Level 3 inputs. Significant

inputs and assumptions used in the valuation models are as follows:

Risk-free interest rate for warrants
Risk-free interest rate for preferred stock
Expected dividend yield
Expected term (years) of call option on preferred stock
Expected term (years) of warrants
Expected volatility
Exercise price (per share) for common stock equivalent for preferred stock and
warrant

December 23,
2019

1.82%  
1.86% - 1.89%  
 —  
1.18 - 2.18  
8.18 - 9.18  
80%  

December 31,
2019

1.82%
1.84% - 1.88%
 —
1.16 - 2.16
8.16 - 9.16
80%

$

1.52 - 1.82  

$

1.52 - 1.82

As of December 23, 2019 and December 31, 2019, the Company deemed it probable that shareholder approval
would be obtained, on or prior to December 31, 2020, with respect to increasing the Company’s authorized shares of
common stock in an amount sufficient to cover the conversion of all potential convertible securities issuable upon exercise
of the Future Tranche Rights. See Note 7 for further details on the such required shareholder approval.

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Note 4.  Investments

The Company’s available-for-sale investments at fair value consisted of the following at December 31, 2019:

(In thousands)
Short-term investments – commercial paper

Total short-term investments

Total investments

  $

  $

Cost

2,774   $
2,774
2,774   $

December 31, 2019

Gross

Gross

     Estimated

Unrealized  

Unrealized  

(Losses)

Gains

Fair
Value

—   $
 —  
 —   $

—   $
 —  
 —   $

2,774  
2,774  
2,774  

The Company had no realized gains or losses from the sale of investments in available-for-sale securities in the year
ended December 31, 2019. There were no losses or other-than-temporary declines in value included in “Interest income” on
the Company’s statements of operations and comprehensive loss for any securities for the year ended December 31, 2019.

Note 5.  Property and Equipment

At December 31, 2019 and 2018, net property and equipment at cost consisted of the following:

(In thousands)
Leasehold improvements
Equipment and other
Total property and equipment, at cost
Less: Accumulated depreciation and amortization

Property and equipment, net

December 31, 
2019

December 31, 
2018

$

$

107  
764  
871  
774  
97  

$

$

104  
767  
871  
664  
207  

Depreciation and amortization expense on property and equipment was approximately $0.1 million, $0.4 million,

and $0.7 million in 2019, 2018 and 2017, respectively. 

During the year ended December 31, 2018, the Company recorded asset impairments related to its property
equipment in the amount of $0.5 million in connection with restructuring activities more fully described in Note 11. No
impairment charges were recognized during the years ended December 31, 2019 or 2017.

Note 6.  Accrued Expenses

At December 31, 2019 and 2018, accrued expenses consisted of the following:

(In thousands)
Payroll and related costs
Clinical and nonclinical trial expenses
Professional and consulting fees
Restructuring expenses
Other

Total accrued expenses

December 31, 
2019

December 31, 
2018

2,179  
4,199  
859  
113  
111  
7,461  

$

$

1,962  
3,958  
605  
1,147  
212  
7,884  

$

$

Included in accrued Payroll and related costs as December 31, 2018 is $0.7 million of salary continuation severance

benefits which was paid in equal installments through October 31, 2019 to former executives. 

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Note 7.  Redeemable Convertible Preferred Stock

December 2019 Private Placement

On December 23, 2019, the Company entered into a Securities Purchase Agreement (the “December 2019 Securities

Purchase Agreement”) with institutional investors affiliated with Baker Brothers (the “Purchasers”), an existing
shareholder and related party as more fully described in Note 16, under which the Company sold 23,684 shares of Series
B1 convertible preferred stock (“Series B1 Preferred Stock”) and warrants to purchase 2,368,400 shares of the Company’s
common stock at an exercise price of $1.52 per share (or, if the holder elects to exercise the warrants for shares of Series
B1 Preferred Stock, 23,684 shares of Series B1 Preferred Stock at an exercise price of $152 per share) for aggregate gross
proceeds of $3.9 million (the “Initial Closing”).

In addition, we have agreed to sell to the Purchasers, at their option and subject to certain conditions including
stockholder approval to increase the Company’s authorized shares of common stock, shares of Series B2 convertible
preferred stock (“Series B2 Preferred Stock”), Series B3 convertible preferred stock (“Series B3 Preferred Stock”) and
Series B4 convertible preferred stock (“Series B4 Preferred Stock) and accompanying warrants to purchase common stock
(or preferred stock at the election of the holder) over a 21-month period after stockholder approval is received (the “Future
Tranche Rights”) as follows:

Future Tranche Rights
Tranche 2 (Series B2) 
Tranche 3 (Series B3) 
Tranche 4 (Series B4) 
Total

(1)

(2)

(2)

Preferred Shares

Price Per
Share

Aggregate
Purchase Price

98,685
82,418
82,418
263,521

  $
  $
  $

152   $
182
182

  $

15,000,120
15,000,076
15,000,076
45,000,272

(1) Accompanied by related warrants to purchase up to 9,868,500 shares of the Company’s common stock (or, if the holder
elects to exercise the warrants for shares of Series B1 Preferred Stock, 98,685 shares of Series B1 Preferred Stock), at an
exercise price of $1.52 per share (or, if the holder elects to exercise the warrants for Series B1 Preferred Stock, $152 per
share of Series B1 Preferred Stock).

(2) Accompanied by related warrants to purchase up to 6,593,440 shares of the Company’s common stock (or, if the holder
elects to exercise the warrants for shares of Series B1 Preferred Stock, 65,934 shares of Series B1 Preferred Stock), at an
exercise price of $1.82 per share (or, if the holder elects to exercise the warrants for Series B1 Preferred Stock, $182 per
share of Series B1 Preferred Stock).

As consideration for the Future Tranche Rights, the Company received aggregate gross proceeds of $6.2 million (the

“Option Fee”). In the event the Company does not receive the required shareholder approval to increase the Company’s
authorized shares of common stock in an amount sufficient to cover the conversion of all potential convertible securities
issuable under the December 2019 Securities Purchase Agreement on or prior to December 31, 2020, the Option Fee shall
be returned to the Purchasers. The Board recommends the stockholders support the proposal to increase the authorized
shares.

The purchase and sale of the securities issuable under tranches 2, 3 and 4 may occur in two or more separate
closings, each to be conducted at the Purchasers’ discretion. The right of the Purchasers to purchase Series B2, Series B3
and Series B4 Preferred Stock will expire 9 months, 15 months, and 21 months following shareholder approval,
respectively. However, the Purchasers’ right to purchase securities under tranches 3 and 4 is contingent on the purchase of
all of the securities in each preceding tranche right. In the event the Purchaser’s do not purchase all of the securities in a
given tranche, their right to purchase shares in future tranches terminates and any outstanding warrants issued under the
December 2019 Securities Purchase Agreement would terminate. Additionally, the Company has the right to decline the
Series B4 Preferred Stock investment if its common stock trades at $7.60 for 20 days out of 30 days subsequent to the
closing of the Series B3 Preferred Stock investment.

In addition to the aggregate gross proceeds received from the Initial Closing and the Option Fee, the Company is

eligible to receive aggregate gross proceeds of up to an additional $87.6 million under the December 2019 Securities
Purchase Agreement. 

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Note 7.  Redeemable Convertible Preferred Stock (Continued)

Accounting Considerations

The Company determined that the Series B1 Preferred Stock, the accompanying Series B1 warrants, and each of the

Future Tranche Rights represented a freestanding financial instrument.  The warrants and the Future Tranche Rights are
liability classified as the underlying shares are potentially redeemable and such redemption is deemed to be outside of the
Company’s control.  The $10.1 million in gross proceeds received in December 2019 was allocated to the Series B1
warrants and the Future Tranche Rights based on their estimated fair values of $2.6 million and $35.5 million, respectively.
The excess fair value of $28.0 million over the gross proceeds received of $10.1 million was recorded as a deemed
dividend to Baker Brothers, an existing significant shareholder. Costs in connection with the December 2019 Securities
Purchase Agreement were expensed as incurred.

Due to the redeemable nature of the Series B1 Preferred Stock, the Series B1 Preferred Stock has been classified as
temporary equity. While the Series B1 Preferred Stock is not currently redeemable, it will become redeemable either on (i)
the fifth anniversary of the initial issue date, or December 23, 2024, provided that certain events (the “Redemption Loss
Events”) do not occur first or (ii) upon a liquidation or deemed liquidation event, provided that certain events (the
“Liquidation Loss Events”) do not occur first. The Company cannot assess the probability of whether the Redemption Loss
Events will occur prior to the fifth anniversary of the initial issue date, if ever, as certain factors triggering such events are
outside the control of the Company. Accordingly, the carrying value of the Series B1 Preferred Stock is being accreted to
its redemption value as of December 31, 2019. In the event the holders of the Series B1 Preferred Stock lose their right to
request redemption, the Series B Preferred Stock will no longer be accreted to its redemption value until redemption upon a
liquidation event is deemed probable. For the year ended December 31, 2019, accretion was de minimis.

Note 8.  Stockholders’ Equity

Preferred Stock

The Restated Certificate of Incorporation, as amended, of the Company permits its board of directors to issue up to

5,000,000 shares of preferred stock, par value $0.01 per share, in one or more series, to designate the number of shares
constituting such series, and fix by resolution, the powers, privileges, preferences and relative, optional or special rights
thereof, including liquidation preferences and dividends, and conversion and redemption rights of each such series.

As of December 31, 2019, the Company has designated the following class of preferred stock:

·

·

·

·

·

Series A:   

1,500,000 authorized shares of Series A Convertible Preferred Stock

Series B1:

Series B2:

Series B3:

Series B4:

277,921 authorized shares of Series B1 Redeemable Convertible Preferred Stock

98,685 authorized shares of Series B2 Redeemable Convertible Preferred Stock

82,814 authorized shares of Series B3 Redeemable Convertible Preferred Stock

82,814 authorized shares of Series B4 Redeemable Convertible Preferred Stock

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Note 8.  Stockholders’ Equity (Continued)

Series A Convertible Preferred Stock.  The dividends on the Series A convertible preferred stock (“Series A Preferred

Stock”) are payable semi-annually in arrears at the rate of 1% per annum, at the election of the Company, either in cash or
additional duly designated, fully paid and nonassessable shares of Series A Preferred Stock. In the event of liquidation,
dissolution or winding up of the Company, after payment of debts and other liabilities of the Company, the holders of the
Series A Preferred Stock then outstanding will be entitled to a distribution of $1 per share out of any assets available to
shareholders. The Series A Preferred Stock is non-voting. All remaining shares of Series A Preferred Stock rank, as to
payment upon the occurrence of any liquidation event, senior to the Company’s common stock. Shares of Series A
Preferred Stock are convertible, in whole or in part, at the option of the holder into fully paid and nonassessable shares of
common stock at $272.00 per share, subject to adjustment. As of December 31, 2019 and 2018, there were 655 shares of
Series A Preferred Stock outstanding.

Series B1, B2, B3 and B4 Convertible Preferred Stock. Holders of Series B1 Preferred Stock, Series B2 Preferred

Stock, Series B3 Preferred Stock and Series B4 Preferred Stock (collectively, the “B1/B2/B3/B4 Preferred Stock”) are
entitled to the amount of dividends, if and when declared, as would be payable to holders of common stock on an “as
converted” basis (e.g. participating dividends). Until the applicable Transition Date (defined below), in the event of a
liquidation event or deemed liquidation event, after payment of debts and other liabilities of the Company, the holders of
the Series B1/B2/B3/B4 Preferred Stock then outstanding will be entitled to a distribution equal to the then applicable
stated value per share of the Series B1/B2/B3/B4 Preferred Stock. Additionally, until the applicable Transition Date
(defined below), at any time on or after the date that is the fifth (5th) anniversary of the initial issue date of the applicable
series of preferred stock, all or any portion of the preferred stock is redeemable at the option of the holder at a redemption
price of $152.00 per share (for Series B1 and Series B2 Preferred Stock) and $182.00 per share (for Series B3 and Series
B4 Preferred Stock). The “Transition Date” means:

a) With respect to the Series B1 Preferred Stock, the first date following December 23, 2021, on which each of the

Conditions (as defined below) is met (the “Series B1 Transition Date”); and

b) With respect to the Series B2 Preferred Stock, Series B3 Preferred Stock and Series B4 Preferred Stock, the first
date following the two-year anniversary of the applicable series of preferred stock’s initial issue date, on which
each of the Conditions (as defined below) is met (the “Series B2 Transition Date”).

The “Conditions” shall mean: (a) the closing price of the Company’s common stock has been equal to or exceeded

the price that is equal to three times (3x) the applicable series of preferred stock’s conversion price ($1.52 for Series B1
Preferred Stock and B2 Preferred Stock; $1.82 for Series B3 Preferred Stock and Series B4 Preferred Stock) for 180
calendar days; (b) the 50-day average trading volume of the Company’s common stock is greater than 500,000 shares
(subject to adjustment for any stock dividend, stock split, stock combination or other similar transaction); and (c) the
presentation by the Company at an appropriate medical conference of the “Overall Survival” data as defined in its
ILLUMINATE-301 study protocol.

The Series B1/B2/B3/B4 Preferred Stock is non-voting and rank, as to payment upon the occurrence of any
liquidation event, senior to the Company’s common stock. Shares of Series B1 Preferred Stock and Series B2 Preferred
Stock are convertible, in whole or in part, at the option of the holder into fully paid and nonassessable shares of common
stock at $1.52 per share, subject to adjustment. Shares of Series B2 Preferred Stock and Series B3 Preferred Stock are
convertible, in whole or in part, at the option of the holder into fully paid and nonassessable shares of common stock at
$1.82 per share, subject to adjustment. As more fully described in Note 7, the Company’s outstanding Series B1 Preferred
Stock is classified in temporary equity, outside of stockholders’ equity as of December 31, 2019. No shares of Series B2
Preferred Stock, Series B3 Preferred Stock or Series B4 Preferred Stock are outstanding as of December 31, 2019.

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Note 8.  Stockholders’ Equity (Continued)

Common Stock

On June 20, 2018, the Company's stockholders approved an amendment to the Company's Restated Certificate of
Incorporation, as amended, to effect a reverse stock split of the Company's outstanding shares of common stock at a ratio
within a range from 1-for-4 to 1-for-8 and set the number of authorized shares of the Company’s common stock at a
number determined by calculating the product of 280,000,000 (previous number of authorized shares) multiplied by two
times (2x) the reverse stock split ratio. On July 27, 2018, the Company implemented a 1-for-8 reverse split of its issued and
outstanding shares of common stock (the “Reverse Split”), and set the number of its authorized shares of common stock to
70,000,000. The Reverse Split became effective on July 27, 2018 at 5:00 p.m., Eastern Time, and the Company’s common
stock began trading on the Nasdaq Capital Market on a Reverse Split-adjusted basis at the opening of trading on July 30,
2018. As of a result of the Reverse Split, every eight shares of the Company’s issued and outstanding common stock were
combined into one share of its common stock, except to the extent that the Reverse Split resulted in any of the Company’s
stockholders owning a fractional share, which was settled in cash. In connection with the Reverse Split, there was no
change in the nominal par value per share of $0.001. The Reverse Split did not change the number of authorized shares or
par value of the Company’s preferred stock.

Common Stock Authorized

As of December 31, 2019, the Company had 70,000,000 shares of common stock authorized of which 25,066,074

shares of common stock were reserved for the issuance upon the exercise of outstanding warrants and options to purchase
common stock, outstanding restricted stock units, the conversion of Series A and Series B1 convertible preferred stock,
shares required to be reserved under the LPC Purchase Agreement (defined below), and shares available for grant under the
Company’s 2013 Stock Incentive Plan and shares available for purchase under the Company’s 2017 Employee Stock
Purchase Plan.

Put Shares

Pursuant to the terms of a unit purchase agreement dated as of May 5, 1998, the Company issued and sold a total of

149,960 shares of common stock (the “Put Shares”) at a price of $128.00 per share. Under the terms of the unit purchase
agreement, the initial purchasers (the “Put Holders”) of the Put Shares have the right (the “Put Right”) to require the
Company to repurchase the Put Shares. The Put Right may not be exercised by any Put Holder unless: (1) the Company
liquidates, dissolves or winds up its affairs pursuant to applicable bankruptcy law, whether voluntarily or involuntarily;
(2) all of the Company’s indebtedness and obligations, including without
limitation the indebtedness under the Company’s then outstanding notes, has been paid in full; and (3) all rights of the
holders of any series or class of capital stock ranking prior and senior to the common stock with respect to liquidation,
including without limitation the Series A convertible preferred stock, have been satisfied in full. The Company may
terminate the Put Right upon written notice to the Put Holders if the closing sales price of its common stock exceeds
$256.00 per share for the twenty consecutive trading days prior to the date of notice of termination. Because the Put Right
is not transferable, in the event that a Put Holder has transferred Put Shares since May 5, 1998, the Put Right with respect
to those shares has terminated. As a consequence of the Put Right, in the event the Company is liquidated, holders of shares
of common stock that do not have Put Rights with respect to such shares may receive smaller distributions per share upon
the liquidation than if there were no Put Rights outstanding.

As of December 31, 2019, the Company has repurchased or received documentation of the transfer of 49,993 Put
Shares and 4,472 of the Put Shares continued to be held in the name of Put Holders. The Company cannot determine at this
time what portion of the Put Rights of the remaining 95,494 Put Shares have terminated.

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Note 8.  Stockholders’ Equity (Continued)

Equity Financings

Common Stock Purchase Agreement

On March 4, 2019, the Company entered into a Purchase Agreement with Lincoln Park Capital Fund, LLC
(“Lincoln Park”), pursuant to which, upon the terms and subject to the conditions and limitations set forth therein, Lincoln
Park has committed to purchase an aggregate of $35.0 million of shares of Company common stock from time to time at
the Company’s sole discretion (the “LPC Purchase Agreement”). As consideration for entering into the LPC Purchase
Agreement, the Company issued 269,749 shares of Company common stock to Lincoln Park as a commitment fee (the
“Commitment Shares”). The closing price of the Company’s common stock on March 4, 2019 was $2.84 and the Company
did not receive any cash proceeds from the issuance of the Commitment Shares. During the year ended December 31,
2019, the Company sold 1,535,848 shares pursuant to the LPC Purchase Agreement, resulting in net proceeds of $3.7
million.

"At-The-Market" Equity Program

In November 2018, the Company entered into a Equity Distribution Agreement (the “ATM Agreement”) with JMP

Securities LLC (“JMP”) pursuant to which the Company may issue and sell shares of its common stock having an
aggregate offering price of up to $50.0 million (the “Shares”) through JMP as its agent. Subject to the terms and conditions
of the ATM Agreement, JMP will use its commercially reasonable efforts to sell the Shares from time to time, based upon
the Company’s instructions, by methods deemed to be an “at the market offering” as defined in Rule 415(a)(4) promulgated
under the Securities Act of 1933, as amended, or if specified by the Company, by any other method permitted by law,
including but not limited to in negotiated transactions. The Company has no obligation to sell any of the Shares, and the
Company or JMP may at any time suspend sales under the ATM Agreement or terminate the ATM Agreement. JMP is
entitled to a fixed commission of 3.0% of the gross proceeds from Shares sold. During the year ended December 31,
2019, the Company sold 532,700 Shares pursuant to the ATM Agreement resulting in net proceeds, after deduction of
commissions and other offering expenses, of $1.6 million. No Shares were sold pursuant to the ATM Agreement during
2018.

October 2017 Follow-on Underwritten Public Offering

On October 30, 2017, the Company closed a follow-on underwritten public offering, in which it sold 4,166,666

shares of common stock at a price to the public of $12.00 per share for aggregate gross proceeds of $50.0 million (“2017
Offering”).  On November 1, 2017, the Company sold an additional 625,000 shares of common stock pursuant to the
exercise in full of the underwriters’ 30-day option to purchase additional shares of the Company’s common stock at the
public offering price less the underwriting discount.  The net proceeds to the Company from the 2017 Offering, including
the exercise by the underwriters of their option to purchase additional shares and after deducting underwriters’ discounts
and commissions and other offering costs and expenses, were approximately $53.7 million. Baker Brothers, which is
affiliated with two of the Company’s directors, participated in the 2017 Offering and purchased 1,000,000 shares of the
Company’s common stock at the price offered to the public.

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Note 8.  Stockholders’ Equity (Continued)

Common Stock Warrants

In connection with various financing transactions, the Company has issued warrants to purchase shares of the
Company’s common stock and preferred stock. The Company accounts for common stock and preferred stock warrants as
equity instruments or liabilities, depending on the specific terms of the warrant agreement. See Note 2 for further details on
accounting policies related to the Company’s warrants.

The following table summarizes outstanding warrants to purchase shares of the Company’s common stock and/or

preferred stock as of December 31, 2019 and 2018:

Description
Liability-classified Warrants
December 2019 Series B1 warrants 

(1)

Equity-classified Warrants
May 2013 warrants
September 2013 warrants
February 2014 warrants

Number of Shares

December 31,
2019

December 31,
2018

  Weighted-Average  
Exercise Price

  Expiration Date

2,368,400
2,368,400

1,949,754
514,756
266,006
2,730,516

 —  
 —  

1,977,041  
521,997  
269,844  
2,768,882  

$ 1.52   Dec 2026

$ 0.08   None 
$ 0.08   None 
$ 0.08   None 

(2)

(2)

(2)

Total outstanding

5,098,916

2,768,882   

(1) The Series B1 warrants are exercisable for either common stock (exercise price of $1.52) or Series B1 Convertible Preferred

Stock (exercise price of $152) at the discretion of the warrant holder.

(2)

In connection with December 2019 Private Placement, the expiration date on these warrants was amended to be indefinite.

The table below is a summary of the Company's warrant activity for the year ended December 31, 2019.

(1)

Outstanding at December 31, 2018
Issued 
Exercised
Expired
Outstanding at December 31, 2019

Number of
Warrants

Weighted-Average
Exercise Price

2,768,882  
2,368,400  
(38,366) 
 —  
5,098,916  

$

$

0.08
1.52
0.08
 —
0.75

(1) During the year ended December 31, 2019, certain related parties were issued warrants as more fully described in Note 16.

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Note 9.  Alliance Revenue

Alliance revenue for the years ended December 31, 2019, 2018 and 2017 represents revenue from contracts with

customers accounted for in accordance with ASC Topic 606. For the years ended December 31, 2019, 2018 and 2017,
Alliance revenue in the accompanying statements of operations and comprehensive loss is comprised of the following:

(In thousands)
Out-license arrangement 
GSK collaboration 
Vivelix collaboration 
Other 

(4)

(2)

(3)

(1)

Total Alliance revenue

2019

2018

2017

$

$

1,447  
 —  
 —  
 1  
1,448  

$

$

 —   $
517
56
89
662

 $

 —
863
14
25
902

(1) For the year ended December 31, 2019, the Company recognized Alliance revenues of $1.4 million under the Licensee

Agreement, as more fully described in Note 10, primarily related to the transfer of the IMO-8400 License and IMO-8400 drug
product.

(2) For the years ended December 31, 2018 and 2017, revenue recognized primarily relates to the amortization of the $2.5 million
upfront, non-refundable, non-creditable cash payment received upon the execution of the GSK Agreement, as more fully
described in Note 10, which was recognized as revenue on a straight-line basis over the estimated 36-month research plan
period, which approximated the timing in which performance obligations were satisfied.  No such revenue was recognized
during 2019. Revenue recognized for the year ended December 31, 2017 also includes an additional $0.1 million related to
additional research services performed in connection with the GSK Agreement. 

(3) For each of the years ended December 31, 2018 and 2017, revenue recognized relates to reimbursements for research services

performed in connection with the Vivelix Agreement, as more fully described in Note 10.

(4) For all periods presented, revenue recognized relates to collaborations which are not material to the Company’s current

operations nor expected to be material in the future, including reimbursements by licensees of costs associated with patent
maintenance.

During each of the years ended December 31, 2018 and 2017, the Company recognized Alliance revenues of $0.6
million and $0.7 million, respectively, as a result of changes in the contract liability balances associated with its contracts
with customers. Such revenue recognized was included in the contract liability balance at the beginning of each respective
period.

See Note 10 for additional details regarding the Company’s collaboration arrangements.

Note 10.  Collaboration and License Agreements

Option and License Agreement with Licensee

In April 2019, the Company entered into an amended and restated option and license agreement with a privately-

held biopharmaceutical company (“Licensee”), pursuant to which the Company granted Licensee (i) exclusive worldwide
rights to develop and market IMO-8400 for the treatment, palliation and diagnosis of all diseases, conditions or indications
in humans (the “IMO-8400 License”), (ii) an exclusive right and license to develop IMO-9200 in accordance with certain
IMO-9200 pre-option exercise protocols (the “IMO-9200 Option Period License”), and (iii) an exclusive option,
exercisable at Licensee’s discretion, to obtain the exclusive worldwide rights to develop and market IMO-9200 for the
treatment, palliation and diagnosis of all diseases, conditions or indications in humans (the “IMO-9200 Option”)
(collectively, the “Licensee Agreement”).  In connection with the Licensee Agreement, the Company transferred certain
drug material to Licensee for Licensee’s use in development activities.  Licensee is solely responsible for the development
and commercialization of IMO-8400 and, if Licensee exercises the IMO-9200 Option, Licensee would be solely
responsible for the development and commercialization of IMO-9200.

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Note 10.  Collaboration and License Agreements (Continued)

Under the terms of the Licensee Agreement, the Company received upfront, non-refundable fees totaling
approximately $1.4 million and ownership of 10% of Licensee’s outstanding common stock, subject to future adjustment,
for granting Licensee the IMO-8400 License, the IMO-9200 Option Period License and transfer of related drug materials.
In addition, the Company is eligible to receive a $1 million non-refundable fee upon Licensee exercising the IMO-9200
Option (“Option Fee”) and is entitled to certain sub-licensing payments on sublicense revenue received by Licensee, if
any. The Company may also be eligible for certain development and sales-based milestone payments and royalties on
global net sales for any future products. The Company does not anticipate the receipt of any of the future milestones or
royalties in the short term, if ever.

The Company concluded that the contract counterparty, Licensee, is a customer and accounted for the Licensee
Agreement in accordance with ASC 606. As of December 31, 2019, the total transaction price of the contract was $1.4
million, which excluded the Option Fee and all development and sales milestones as all such payments were fully
constrained. Additionally, as of December 31, 2019, there were no remaining performance obligations under the Licensee
Agreement. The Company re-evaluates its performance obligations and transaction price in each reporting period and as
uncertain events are resolved or other changes in circumstances occur.

As disclosed above, in connection with the Licensee Agreement, the Company owns 10% of Licensee’s outstanding
common stock, subject to future adjustment. The Company evaluated the guidance in ASC Topic 321, Investments-Equity
Securities, and elected to account for the investment using the measurement alternative as the equity securities are without
a readily determinable fair value, and the arrangement does not result in Idera having control or significant influence over
Licensee. Accordingly, the securities are measured at cost, less any impairment, plus or minus changes resulting from
observable price changes and are recorded in Other assets at a value of less than $0.1 million in the accompanying balance
sheets. As of December 31, 2019, the Company considered the cost of the investment to not exceed the fair value of the
investment and did not identify any observable price changes.

See Note 9 for details on revenue recognized in connection with the Company’s collaboration with Licensee for each

of the years ended December 31, 2019, 2018 and 2017.

Collaboration with Vivelix

In November 2016, the Company entered into an exclusive license and collaboration agreement with

Vivelix Pharmaceuticals, Ltd. (“Vivelix”) pursuant to which the Company granted Vivelix worldwide rights to develop and
market IMO-9200 for non-malignant gastrointestinal disorders and certain back-up compounds to IMO-9200 (the “Vivelix
Agreement”). Under the terms of the Vivelix Agreement, Vivelix was solely responsible for the development and
commercialization of IMO-9200 and any designated back-up compounds. In connection with the Vivelix Agreement, Idera
also transferred certain drug material to Vivelix for Vivelix’s use in its development activities. Additionally, Vivelix could
request that the Company create, characterize and perform research on back-up compounds. 

At the effective date of the Vivelix Agreement, Baker Bros. Advisors LP and certain of its affiliated funds

(collectively “Baker Brothers”) beneficially owned approximately 7.0% of the Company’s outstanding common stock and
affiliates of Baker Brothers constituted two of the four directors on the board of directors of Vivelix and two of the seven
directors on the board of directors of the Company.

Under the terms of the Vivelix Agreement, the Company received an upfront, non-refundable fee of $15 million

related to the license granted for IMO-9200 and back-up compounds to IMO-9200, which was recognized at the inception
of the Vivelix Agreement in the fourth quarter of 2016. Additionally, the Company was eligible for future IMO-9200
related development, regulatory and sales milestone payments and sales-based royalties. However, on March 4, 2019, the
Company and Vivelix mutually agreed to terminate the Vivelix Agreement.  Accordingly, the Company is no longer
eligible to receive any future milestone or royalty-based payments and all rights previously granted to Vivelix with respect
to IMO-9200 and certain back-up compounds to IMO-9200 reverted back to the Company.

See Note 9 for details on revenue recognized in connection with the Company’s collaboration with Vivelix for each

of the years ended December 31, 2019, 2018 and 2017.

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Table of Contents

Note 10.  Collaboration and License Agreements (Continued)

Collaboration with GSK

In November 2015, the Company entered into a collaboration and license agreement with GSK to license, research,

develop and commercialize pharmaceutical compounds from the Company’s nucleic acid chemistry technology for the
treatment of selected targets in renal disease (the “GSK Agreement”). In connection with the GSK Agreement, GSK
identified an initial target for the Company to attempt to identify a potential population of development candidates to
address such target under a mutually agreed upon research plan. Prior to the wind-down of its discovery operations as more
fully described in Note 10, the Company created multiple development candidates to address the initial target designated by
GSK. Until November 2019, the expiration of the collaboration term, GSK had the right to designate one development
candidate in its sole discretion, from the population of identified candidates, to move forward into clinical development.
However, GSK did not designate any candidate for development during the collaboration term. If such designation had
occurred, GSK would have been solely responsible for the development and commercialization activities of that designated
development candidate.

The GSK Agreement also provided GSK with the option to select up to two additional targets at any time during the

first two years of the GSK agreement, for further research under mutually agreed upon research plans. Upon selecting
additional targets, GSK then had the option to designate one development candidate for each additional target, at which
time GSK would have sole responsibility to develop and commercialize each such designated development candidate. GSK
did not select any additional targets for research through expiry of the option period.

Under the terms of the GSK Agreement, the Company received a $2.5 million upfront, non-refundable, non-
creditable cash payment upon the execution of the GSK Agreement.  Additionally, the Company was initially eligible to
receive a total of up to approximately $100 million in license, research, clinical development and commercialization
milestone payments, of which $9 million of these milestone payments would have been payable by GSK upon the
identification of the additional targets, the completion of current and future research plans and the designation of
development candidates and $89 million would have been payable by GSK upon the achievement of clinical milestones
and commercial milestones. As a result of GSK not designating a development candidate during the collaboration term, the
Company is no longer eligible to receive any additional license, research, clinical development and commercialization
milestone payments, or any royalty payments.

See Note 9 for details on revenue recognized in connection with the Company’s collaboration with GSK for each of

the years ended December 31, 2019, 2018 and 2017.

Collaboration with Abbott Molecular Inc.

In May 2014, the Company entered into a development and commercialization agreement with Abbott Molecular,
Inc. (“Abbott Molecular”) for the development of an in vitro companion diagnostic intended to be used in the Company’s
prior clinical development programs to treat certain genetically defined forms of B-cell lymphoma with IMO-8400. The
agreement provided for the development and subsequent commercialization by Abbott Molecular of a companion
diagnostic test utilizing polymerase chain reaction technology to identify with high sensitivity and specificity the presence
in tumor biopsy samples of the oncogenic mutation referred to scientifically as MYD88 L265P. Under the agreement,
Abbott Molecular was primarily responsible for developing and obtaining regulatory approvals for the companion
diagnostic in accordance with an agreed development plan and regulatory plan and for making the companion diagnostic
test commercially available in accordance with an agreed commercialization plan. Abbott Molecular would retain all
proceeds from commercialization of the companion diagnostic test, if any. In September 2016, the Company suspended
internal clinical development of IMO-8400 for B-cell lymphomas. While the Company has maintained its relationship with
Abbott, the Company is permitted to terminate the agreement upon 90 days written notice to Abbott Molecular and, under
circumstances specified in the agreement, payment of a termination fee and wind-down costs. The parties also may
terminate the agreement based on uncured material breaches by or the bankruptcy or insolvency of the other party, and each
party has the right to terminate the agreement in the event of specified permanent injunctions based on infringement of
third party intellectual property rights.

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Note 10.  Collaboration and License Agreements (Continued)

The Company incurred approximately $0.4 million, and $0.8 million in expenses under the Abbott Molecular
agreement during the years ended December 31, 2018 and 2017, respectively, related to funding Abbott Molecular’s
development of the companion diagnostic test. No such costs were incurred during 2019.

Note 11.  Restructuring Costs

In July 2018, the Company determined to wind-down its discovery operations, reduce the workforce in Cambridge,

Massachusetts that supports such operations, and close its Cambridge facility. In connection with the reduction-in-
workforce, 18 positions were being eliminated, primarily in the area of discovery, representing approximately 40% of the
Company’s employees. Of the 18 positions eliminated, 15 were effective July 31, 2018 with the remaining effective during
the first half of 2019. The Company completed the consolidation of its operations to its Exton, Pennsylvania location in the
third quarter of 2018.

 Total restructuring-related charges incurred through December 31, 2019 totaled $3.3 million and were comprised of

(i) one-time termination costs in connection with the reduction in workforce, including severance, benefits and related
costs, of approximately $2.8 million; (ii) contract termination costs of approximately $0.2 million in connection with the
early lease termination for the Cambridge facility; and (iii) non-cash asset impairments of approximately $0.7 million,
inclusive of $0.5 million of fixed asset impairments and $0.2 million in write-offs of facility-related prepaid expenses;
offset by (iv) a non-cash gain of approximately $0.4 million related to the write-off of the remaining deferred rent liability
associated with the Cambridge facility lease.

The following summarizes restructuring-related activity for the years ended December 31, 2019 and 2018:

(in thousands)
Accrued restructuring balance as of December 31, 2017

Charges incurred (1)
Cash payments
Non-cash settlements
Adjustments

  $

Accrued restructuring balance as of December 31, 2018

  $

Charges incurred
Cash payments

Accrued restructuring balance as of December 31, 2019

  $

Employee
Severance
and Benefits  

Contract
Termination
Costs

Asset
Impairments  

Total

 —   $

2,635  
(1,380) 
(24) 
(84) 
1,147   $
181  
(1,215) 

113   $

 —   $
225  
(225) 
 —  
 —  
 —   $
 —  
 —  
 —   $

 —   $
674  
 —  
(674) 
 —  
 —   $
 —  
 —  
 —   $

 —
3,534
(1,605)
(698)
(84)
1,147
181
(1,215)
113

(1) Excludes $0.4 million gain due to the write-off of the remaining deferred rent liability associated with the termination of the

Cambridge, Massachusetts facility lease.

As of December 31, 2019, the entire accrued restructuring balance is classified as a current liability and included in

“Accrued expenses” in the accompanying balance sheets. See Note 6.

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Table of Contents

Note 12.  Stock-based Compensation

As of December 31, 2019, the only equity compensation plans from which the Company may currently issue new

awards are the Company’s 2013 Stock Incentive Plan (as amended to date, the “2013 Plan”) and 2017 Employee Stock
Purchase Plan (the “2017 ESPP”), each as more fully described below.

Equity Incentive Plans

2013 Stock Incentive Plan

The Company's board of directors adopted the 2013 Plan,  which was approved by the Company’s stockholders

effective July 26, 2013. Amendments to the 2013 Plan were approved by the Company’s stockholders in June 2014, June
2015, June 2017 and June 2019. The 2013 Plan is intended to further align the interests of the Company and its
stockholders with its employees, including its officers, non-employee directors, consultants and advisers by providing
equity-based incentives. The 2013 Plan allows for the issuance of incentive stock options intended to qualify under
Section 422 of the Internal Revenue Code, non-statutory stock options, stock appreciation rights, restricted stock awards,
restricted stock units, other stock-based awards and performance awards. The total number of shares of common stock
authorized for issuance under the 2013 Plan is 5,653,057 shares of the Company’s common stock, plus such additional
number of shares of common stock (up to 868,372 shares) as is equal to the number of shares of common stock subject to
awards granted under the Company’s 2005 Stock Incentive Plan or 2008 Stock Incentive Plan (the “2008 Plan”), to the
extent such awards expire, terminate or are otherwise surrendered, canceled, forfeited or repurchased by the Company at
their original issuance price pursuant to a contractual repurchase right.

As of December 31, 2019, options to purchase a total of 3,459,693 shares of common stock and 193,625 restricted

stock units were outstanding and up to 2,301,240 shares of common stock remained available for grant under the 2013
Plan. The Company has not made any awards pursuant to other equity incentive plans, including the 2008 Plan, since the
Company’s stockholders approved the 2013 Plan. As of December 31, 2019, options to purchase a total of 366,974 shares
of common stock were outstanding under the 2008 Plan. 

In addition, as of December 31, 2019, non-statutory stock options to purchase an aggregate of 393,750 shares of
common stock were outstanding that were issued outside of the 2013 Plan to certain employees in 2017, 2015 and 2014
pursuant to the Nasdaq inducement grant exception as a material component of new hires’ employment compensation.

Employee Stock Purchase Plans

1995 Employee Stock Purchase Plan

The Company’s 1995 Employee Stock Purchase Plan (the “1995 ESPP”), as amended, provided for the issuance of
up to 62,500 shares of common stock to participating employees of the Company or its subsidiaries. The 1995 ESPP was
terminated effective August 31, 2017 as a result of the adoption by the Company’s board of directors and approval of
shareholders of the 2017 Employee Stock Purchase Plan (the “2017 ESPP”), as described below.

2017 Employee Stock Purchase Plan

The Company’s board of directors adopted the 2017 ESPP which was approved by the Company’s stockholders and

became effective June 7, 2017. An amendment to the 2017 ESPP was approved by the Company’s stockholders in June
2019.  The 2017 ESPP is intended to qualify as an "employee stock purchase plan" as defined in Section 423 of the Internal
Revenue Code, and is intended to encourage our employees to become stockholders of ours, to stimulate increased interest
in our affairs and success, to afford employees the opportunity to share in our earnings and growth and to promote
systematic savings by them. The total number of shares of common stock authorized for issuance under the 2017 ESPP is
412,500 shares of common stock, subject to adjustment as described in the 2017 ESPP.  Participation is limited to
employees that would not own 5% or more of the total combined voting power or value of the stock of the Company after
the grant. As of December 31, 2019, 321,341 shares remained available for issuance under the 2017 ESPP.

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Note 12.  Stock-based Compensation (Continued)

Stock Purchase Plan Administration

The 1995 ESPP provided for and 2017 ESPP provides for offerings to employees to purchase common stock with
offerings beginning on dates determined by the compensation committee of the board of directors or on the first business
day thereafter.  Each offering begins a “plan period” during which payroll deductions are to be made and held for the
purchase of common stock at the end of the plan period.  The compensation committee may, at its discretion, choose a plan
period of 12 months or less for subsequent offerings and/or choose a different commencement date for offerings.  During
each plan period participating employees may elect to have a portion of their compensation, ranging from 1% to 10% of
compensation as defined by the plan, withheld and used for the purchase of common stock at the end of each plan period.
The purchase price is equal to 85% of the lower of the fair market value of a share of common stock on the first trading
date of each plan period or the fair market value of a share of common stock on the last trading day of the plan period, and
is limited by participant to $25,000 in fair value of common stock per year as well as other quarterly plan limitations as
defined by each plan.

For the years ended December 31, 2019, 2018 and 2017, the Company issued 60,953,  24,824, and 21,869 shares of

common stock, respectively, under the Company’s employee stock purchase plans and recognized $0.1 million, $0.1
million, and $0.2 million, respectively, in related stock-based compensation expense.

Accounting for Stock-based Compensation

The Company recognizes non-cash compensation expense for stock-based awards under the Company’s  equity
incentive plans over an award’s requisite service period, or vesting period, using the straight-line attribution method, based
on their grant date fair value, determined using the Black-Scholes option-pricing model. The fair value of the discounted
purchases made under the Company’s 2015 ESPP and 2017 ESPP is calculated using the Black-Scholes option-pricing
model. The fair value of the look-back provision plus the 15% discount is recognized as compensation expense over each
plan period.

Total stock-based compensation expense attributable to stock-based payments made to employees and directors and

employee stock purchases included in operating expenses in the Company's statements of operations for the years ended
December 31, 2019, 2018 and 2017 was as follows:

(in thousands)
Stock-based compensation:
Research and development

Employee Stock Purchase Plans
Equity Incentive Plans (1)

General and administrative

Employee Stock Purchase Plans
Equity Incentive Plans

Restructuring costs

Equity Incentive Plans

Total stock-based compensation expense

2019

2018

2017

$

$

$

$

$
$
$

36      $
1,312       
1,348      $

20      $
2,477       
2,497      $

 —  
$
 —  
$
3,845      $

71      $
1,780       
1,851      $

48      $
3,751       
3,799      $

24  
$
24  
$
5,674      $

96
6,398
6,494

63
4,163
4,226

 —
 —
10,720

(1) The 2017 charge includes approximately $4.3 million of additional stock-based compensation recognized as a result of

modifications to previously issued stock option awards in connection with the resignation of an executive.

During the years ended December 31, 2019, 2018 and 2017, the weighted average fair market value of stock options

granted was $1.64,  $7.00, and $8.08, respectively.

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Note 12.  Stock-based Compensation (Continued)

Assumptions Used in Determining Fair Value of Stock Options

Inherent in the Black-Scholes option-pricing model are the following assumptions:

Volatility. The Company estimates stock price volatility based on the Company’s historical stock price performance
over a period of time that matches the expected term of the stock options.

Risk-free interest rate. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of
grant commensurate with the expected term assumption.

Expected term. The expected term of stock options granted is based on an estimate of when options will be exercised
or cancelled in the future.

Dividend rate. The dividend rate is based on the historical rate, which the Company anticipates will remain at zero.

Forfeitures. The Company accounts for forfeitures when they occur. Ultimately, the actual expense recognized over
the vesting period will be for only those shares that vest. See Note 2.

The fair value of each option award at the date of grant was estimated using the Black-Scholes option pricing model.

All options granted during the three years in the period ended December 31, 2019 were granted at exercise prices equal to
the fair market value of the common stock on the dates of grant. 

The following weighted average assumptions apply to the options to purchase 1,279,016,  1,136,874, and 527,039
shares of common stock granted to employees and directors during the years ended December 31, 2019, 2018 and 2017,
respectively:

Average risk-free interest rate
Expected dividend yield
Expected lives (years)
Expected volatility
Weighted average exercise price (per share)

2019

2018

2017

2.1%  
 —  
3.7  
84%  
2.75  

$

2.5%  
 —  
3.7  
74%  
12.63  

$

1.7%  
 —  
4.0  
86%  
12.96  

  $

All options granted during the year ended December 31, 2019 and 2018 were granted at exercise prices equal to the

fair market value of the common stock on the dates of grant.

Stock Option Activity

The following table summarizes stock option activity for the year ended December 31, 2019.

($ in thousands, except per share data)
Outstanding at December 31, 2018

Granted
Exercised
Forfeited
Expired

Outstanding at December 31, 2019 (1)
Exercisable at December 31, 2019

Stock
Options
3,304,531   $
1,279,016  
 —  
(143,874) 
(219,256) 
4,220,417   $
2,292,157   $

Weighted-
Average
Exercise Price  
18.41  
2.75  
 —  
12.95  
31.29  
13.08  
19.20  

Weighted-
Average
Remaining
Contractual
Life
(in years)

6.6   $

Aggregate
Intrinsic 
Value

6.6   $
4.7   $

 —  
 —  

(1)

Includes both vested stock options as well as unvested stock options for which the requisite service period has not been
rendered but that are expected to vest based on achievement of a service condition.

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Note 12.  Stock-based Compensation (Continued)

The fair value of options that vested during the year ended December 31, 2019 was $4.7 million. As of December

31, 2019, there was $5.2 million of unrecognized compensation cost related to unvested options, which the Company
expects to recognize over a weighted average period of 2.5 years.

Restricted Stock Activity

The following table summarizes restricted stock activity for the year ended December 31, 2019:

($ in thousands, except per share data)
Nonvested shares at December 31, 2018

Granted
Cancelled
Vested

Nonvested shares at December 31, 2019

Number of Shares  
 —  
194,550  
(925) 
 —  
193,625  

$

$

Weighted-Average
Grant Date 
Fair Value

 —
3.14
3.14
 —
3.14

As of December 31, 2019, there was $0.5 million of unrecognized compensation cost related to the restricted stock

units, which is expected to be recognized over a weighted average period of 3.0 years.

Note 13.  Commitments and Contingencies

Lease Commitments

As of December 31, 2019, the Company’s leased assets consisted of its office headquarters in Exton, Pennsylvania.

Prior to the September 30, 2018 termination date, the Company also leased a facility in Cambridge, Massachusetts. During
2019, 2018 and 2017, rent expense, including real estate taxes, was $0.3 million, $1.7 million, and $2.4 million,
respectively. The leases are classified as operating leases.

Future minimum commitments as of December 31, 2019 under the Company’s lease agreements are approximately:

December 31,
2020
2021
2022
2023
2024
2025

Operating Leases
(in thousands)

217  
224  
229  
235  
240  
100  
1,245  

$

$

The Company entered into the Exton, Pennsylvania facility lease on April 1, 2015, which was subsequently amended

on September 23, 2015 to include additional space. We currently lease approximately 11,000 square feet of office space at
our Exton facility. The lease expires on May 31, 2025 as a result of the Company’s election to exercise its five-year renewal
option. 

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Note 14.  Income Taxes

In December 2017, the Tax Cuts and Jobs Act (“TCJA”) was signed into law. Among other things, the TCJA
permanently lowers the corporate federal income tax rate to 21% from the existing maximum rate of 35%, effective for tax
years including or commencing January 1, 2018. As a result of the reduction of the corporate federal income tax rate to
21%, GAAP required companies to revalue their deferred tax assets and deferred tax liabilities as of the date of enactment,
with the resulting tax effects accounted for in the reporting period of enactment. This revaluation resulted in a provision of
$27.6 million to income tax expense and a corresponding reduction in the valuation allowance for the year ended December
31, 2017. As a result, there was no impact to the Company’s statement of operations and comprehensive loss for the year
ended December 31, 2017 as a result of reduction in tax rates.

The Company’s preliminary estimate of the TCJA and the remeasurement of its deferred tax assets and liabilities was

subject to the finalization of management’s analysis related to certain matters, such as developing interpretations of the
provisions of the TCJA, changes to certain estimates and the filing of the Company’s tax returns. The final determination of
the TCJA and the remeasurement of the Company’s deferred assets and liabilities was completed during 2018, within one
year from the enactment of the TCJA, as additional information became available. There were no changes to management’s
analysis of the effects of TCJA originally performed as of December 31, 2017.

Certain provisions from the Tax Reform Act of 1986 were not impacted by TCJA, such as those limiting the amount

of net operating loss carryforwards (“NOLs”) and tax credit carryforwards that companies may utilize in any one year in
the event of changes in ownership, as defined by Section 382 of the Internal Revenue Code. The Company has completed
several financings since the effective date of the Tax Reform Act of 1986, which as of December 31, 2019, have resulted in
ownership changes that will significantly limit the Company’s ability to utilize its net operating loss and tax credit
carryforwards. In December 2017, the Company completed a study which determined that ownership changes had
occurred. The federal and state net operating loss and tax credit carryforwards and related deferred tax assets shown in the
table below have been adjusted to reflect the limitations that resulted from this study. The Company continues to monitor
equity activity and potential ownership changes. 

As of December 31, 2019, the Company had cumulative federal and state NOLs of approximately $295.8 million and
$290.2 million available to reduce federal and state taxable income, respectively. As a result of TCJA, federal net operating
losses incurred for taxable years beginning after January 1, 2018 have an unlimited carryforward period, but can only be
utilized to offset 80% of taxable income in future taxable periods. Of the $295.8 million of federal NOLs, $98.4 million
have an unlimited carryforward and the remaining NOLs are still subject to expiration through 2037. State NOLs are still
subject to expiration according to the laws of each respective jurisdiction. The Company files state tax returns in
Massachusetts and Pennsylvania whereby both jurisdictions impose a 20-year carryforward period. All $290.2 million of
state NOLs expire through 2039, with the first year of expiration being 2032 for $21.0 million of Massachusetts NOLs. In
addition, at December 31, 2019, the Company had cumulative federal and state tax credit carryforwards of $21.6 million
and $1.9 million, respectively, available to reduce federal and state income taxes, respectively, which expire through 2039
and 2034, respectively, for federal and state purposes. 

As of December 31, 2019 and 2018, the components of the deferred tax assets are approximately as follows:

Operating loss carryforwards
Tax credit carryforwards
Lease liabilities
Other

Total deferred tax assets
Right-of-use asset
Valuation allowance
Net deferred tax assets

F-34

2019

2018

(In thousands)

$

$

81,403  
23,072  
308  
7,994  
112,777  
(306) 
(112,471) 
 —  

$

$

70,509
18,514
 —
8,627
97,650
 —
(97,650)
 —

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
    
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Note 14.  Income Taxes (Continued)

The Company has provided a full valuation allowance for its deferred tax asset due to the uncertainty surrounding the

ability to realize these assets.

The difference between the U.S. federal corporate tax rate and the Company’s effective tax rate for the years ended

December 31, 2019, 2018 and 2017 is as follows:

Expected federal income tax rate
Expiring credits and NOLs
Change in valuation allowance
Federal and state credits
State income taxes, net of federal benefit
Permanent differences
Rate change related to TCJA
Other
Effective tax rate

2019
(21.0)%  
 —  
26.2  
(8.1) 
(4.7) 
4.8  
 —  
2.8  
0.0 %  

2018
(21.0)%  
1.0  
37.9  
(7.4) 
(9.7) 
0.5  
 —  
(1.3) 
0.0 %  

2017
(34.0)%
—  
0.9  
(6.9) 
(3.7) 
2.4  
41.9  
(0.6) 
0.0 %

The Company applies ASC 740-10, Accounting for Uncertainty in Income Taxes, an interpretation of ASC 740.

ASC 740-10 clarifies the accounting for uncertainty in income taxes recognized in financial statements and requires the
impact of a tax position to be recognized in the financial statements if that position is more likely than not of being
sustained by the taxing authority. The Company had no unrecognized tax benefits resulting from uncertain tax positions at
December 31, 2019 and 2018.

The Company has not conducted a study of its research and development tax credit carryforwards. Such a study

might result in an adjustment to the Company’s research and development credit carryforwards, however, until a study is
completed and any adjustment is known, no amounts are being presented as an uncertain tax position under ASC 740-10. A
full valuation allowance has been provided against the Company’s research and development credits and, if an adjustment
is required, this adjustment would be offset by an adjustment to the valuation allowance. Thus, there would be no impact to
the statements of operations and comprehensive loss if an adjustment was required.

The Company files income tax returns in the U.S. federal, Massachusetts and Pennsylvania jurisdictions. The
Company is no longer subject to tax examinations for years before 2016, except to the extent that it utilizes NOLs or tax
credit carryforwards that originated before 2016. The Company does not believe there will be any material changes in its
unrecognized tax positions over the next 12 months. The Company has not incurred any interest or penalties. In the event
that the Company is assessed interest or penalties at some point in the future, they will be classified in the statements of
operations and comprehensive loss as general and administrative expense.

Note 15.  Employee Benefit Plan

The Company has an employee benefit plan under Section 401(k) of the Internal Revenue Code. The plan allows
employees to make contributions up to a specified percentage of their compensation. Under the plan, the Company matches
a portion of the employees’ contributions up to a defined maximum. Prior to August 2018, the Company historically
contributed up to 3% of employee base salary, by matching 50% of the first 6% of annual base salary contributed by each
employee. Effective August 2018, the Company began contributing up to 5% of employee base salary, by matching 100%
of the first 5% of annual base salary contributed by each employee.  Approximately $0.3 million, $0.2 million and $0.3
million of 401(k) benefits were charged to operating expenses for the years ended December 31, 2019, 2018 and 2017,
respectively.

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Table of Contents

Note 16.  Related Party Transactions

Baker Brothers

Julian C. Baker, a member of the Company’s Board until his resignation in September 2018, is a principal of Baker
Bros. Advisors, LP.  Additionally, Kelvin M. Neu, a member of Company’s Board until his resignation in June 2019, is an
employee of Baker Bros. Advisors, LP. As of December 31, 2019, Baker Bros. Advisors, LP and certain of its affiliated
funds (collectively, “Baker Brothers”) held sole voting power with respect to an aggregate of 4,608,786 shares of the
Company’s common stock, representing approximately 16% of the Company's outstanding common stock.

During 2019, Baker Brothers purchased shares of the Company’s Series B1 Preferred Stock and accompanying
warrants to purchase common stock in connection with the 2019 Private Placement, as more fully described in Note 7.
Concurrent with the 2019 Private Placement, the Company amended the warrants initially issued to Baker Brothers and
other holders on May 7, 2013, September 30, 2013 and February 10, 2014 to remove expiration date.  Following the
amendment, these warrants will not expire.

During 2018, Baker Brothers exercised warrants to purchase 2,700,791 shares of the Company’s common stock at an

exercise price of $3.76 per share for a total exercise price of approximately $9.5 million.

During 2017, Baker Brothers purchased shares of the Company’s common stock in connection with underwritten

public offerings of shares of the Company’s common stock as more fully described in Note 8.

As of December 31, 2019, Baker Brothers held warrants to purchase up to 2,708,812 shares of the Company’s
common stock at an exercise price of $0.08 per share, warrants to purchase up to 2,368,400 shares of the Company’s
common stock (or, if Baker Brothers elects to exercise the warrants for shares of Series B1 Preferred Stock, 23,684 shares
of Series B1 Preferred Stock), at an exercise price of $1.52 per share (or, if Baker Brothers elects to exercise the warrants
for shares of Series B1 Preferred Stock, $152 per Series B1 Preferred Warrant Share.

Pillar Investment Entities

Youssef El Zein, a member of the Company’s board of directors until his resignation in October 2017, is a director

and controlling stockholder of Pillar Invest Corporation (“Pillar Invest”), which is the general partner of Pillar
Pharmaceuticals I, L.P., Pillar Pharmaceuticals II, L.P. (“Pillar II”), Pillar Pharmaceuticals III, L.P. (“Pillar III”), Pillar
Pharmaceuticals IV, L.P. (“Pillar IV”) and Pillar Pharmaceuticals V, L.P. (“Pillar V”), Pillar Pharmaceuticals 6 L.P. and
Pillar Partners Foundation L.P. (collectively, the “Pillar Investment Entities”). As of December 31, 2019, the Pillar
Investment Entities own approximately 11% of the Company's common stock.

During 2018, Participations Besancon, an investment fund advised by Pillar Invest having no affiliation with Mr. El

Zein, exercised warrants to purchase 150,000 shares of the Company’s common stock at an exercise price of $3.76 per
share for a total exercise price of approximately $0.6 million.

During 2017, Pillar II exercised 629,257 warrants to purchase shares of the Company’s common stock at a total

exercise price of approximately $3.5 million and Besancon exercised 364,752 warrants to purchase shares of the
Company’s common stock at a total exercise price of approximately $1.9 million.  The warrant exercise prices had been
established at the time that the warrants were purchased.

Board Fees Paid in Stock

Pursuant to the Company’s director compensation program, in lieu of director board and committee fees of
approximately $0.1 million incurred during each of the years ended December 31, 2019, 2018 and 2017, respectively, the
Company issued 53,985,  13,654, and 7,867 shares of common stock, respectively, to certain of its directors.  Director
board and committee fees are paid in arrears and the number of shares issued was calculated based on the market closing
price of the Company’s common stock on the issuance date.

F-36

 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

Note 17.  Net Loss per Common Share Applicable to Common Stockholders

Net loss applicable to common stockholders represents net loss adjusted for deemed dividends related to the
December 2019 Private Placement, as more fully described in Note 7. Basic and diluted net loss per common share
applicable to common stockholders is calculated by dividing net loss applicable to common stockholders by the weighted-
average number of shares of common stock outstanding during the period, without consideration of common stock
equivalents. The Company’s potentially dilutive securities, which include outstanding stock option awards, unvested
restricted stock units, common stock warrants, convertible preferred stock and securities underlying the Future Tranche
Rights (see Note 7), are considered to be common stock equivalents and are only included in the calculation of diluted net
loss per share when their effect is dilutive. For the years ended December 31, 2019, 2018 and 2017, diluted net loss per
common share applicable to common stockholders was the same as basic net loss per common share applicable to common
stockholders as the effects of the Company’s potential common stock equivalents are antidilutive.

Total antidilutive securities that were excluded from the calculation of diluted net loss per share applicable to

common stockholders, due to their anti-dilutive effect, were 61,289,079,  6,075,339, and 8,145,188 as of December 31,
2019, 2018 and 2017, respectively.  Such antidilutive securities consisted of stock options, unvested restricted stock units,
convertible preferred stock, warrants and securities underlying Future Tranche Rights as December 31, 2019, and consisted
of stock options, convertible preferred stock and warrants as of December 31, 2018 and 2017.

Note 18.  Subsequent Events

The Company considers events or transactions that occur after the balance sheet date but prior to the issuance of the
financial statements to provide additional evidence relative to certain estimates or to identify matters that require additional
disclosure.

Proceeds from Sale of Common Stock

"At-The-Market" Equity Program

During the period January 1, 2020 through March 11, 2020, the Company sold 403,983 shares of its common stock

pursuant to the ATM Agreement, as more fully described in Note 8, resulting in net proceeds after deduction of
commissions of $0.6 million.

Common Stock Purchase Agreement

During the period January 1, 2020 through March 11, 2020, the Company sold 450,000 shares of its common

pursuant to the LPC Purchase Agreement, as more fully described in Note 8, resulting in net proceeds of $0.8 million. 

F-37

 
 
 
 
 
 
 
 
 
 
 
Exhibit 4.11

Execution Copy

REGISTRATION RIGHTS AGREEMENT

This Registration Rights Agreement (this “Agreement”) is made as of December 23, 2019,

by and between Idera Pharmaceuticals, Inc., a Delaware corporation (the “Company”), and the
persons listed on the attached Schedule A who are signatories to this Agreement (collectively, the
“Investors”). Unless otherwise defined herein, capitalized terms used in this Agreement have the
respective meanings ascribed to them in Section 1.

RECITALS

WHEREAS, the Company and the Investors wish to provide for certain arrangements with

respect to the registration of the Registrable Securities (as defined below) by the Company under
the Securities Act (as defined below).

NOW, THEREFORE, in consideration of the mutual promises and covenants set forth

herein, and other consideration, the receipt and adequacy of which are hereby acknowledged, the
parties hereto agree as follows:

Section 1.
Definitions

1.1.    Certain Definitions. In addition to the terms defined elsewhere in this Agreement, as used in
this Agreement, the following terms have the respective meanings set forth below:

(a)    “Board” shall mean the Board of Directors of the Company.

(b)    “Commission” shall mean the Securities and Exchange Commission or any other

federal agency at the time administering the Securities Act.

(c)    “Common Stock” shall mean the common stock of the Company, par value $0.001 per

share.

(d)    “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended, or any
similar successor federal statute and the rules and regulations thereunder, all as the same shall be in
effect from time to time.

(e)    “Other Securities” shall mean securities of the Company, other than Registrable

Securities (as defined below).

(f)    “Person” shall mean any individual, partnership, corporation, company, association,
trust, joint venture, limited liability company, unincorporated organization, entity or division, or
any government, governmental department or agency or political subdivision thereof.

(g)    “Registrable Securities” shall mean the shares of Common Stock and any Common
Stock issued or issuable upon the exercise or conversion of any other securities (whether equity,

 
 
 
 
debt or otherwise) of the Company now owned or hereafter acquired by any of the Investors.
Registrable Securities shall cease to be Registrable Securities upon the earliest to occur of the
following events: (i) such Registrable Securities have been sold pursuant to an effective
Registration Statement; (ii) such Registrable Securities have been sold by the Investors pursuant to
Rule 144 (or other similar rule), (iii) at any time after any of the Investors become an affiliate of
the Company, such Registrable Securities may be resold by the Investor holding such Registrable
Securities without limitations as to volume or manner of sale pursuant to Rule 144; or (iv) ten (10)
years after the date of this Agreement. For purposes of this definition, in order to determine
whether an Investor is an “affiliate” (as such term is defined and used in Rule 144, and including
for determining whether volume or manner of sale limitations of Rule 144 apply) the parties will
assume that all convertible securities (whether equity, debt or otherwise) have been converted into
Common Stock.

(h)    The terms “register,” “registered” and “registration” shall refer to a registration

effected by preparing and filing a Registration Statement in compliance with the Securities Act,
and such Registration Statement becoming effective under the Securities Act.

(i)    “Registration Expenses” shall mean all expenses incurred by the Company in effecting

any registration pursuant to this Agreement, including, without limitation, all registration,
qualification, and filing fees, printing expenses, escrow fees, fees and disbursements of counsel for
the Company, up to $50,000 of reasonable legal expenses of one special counsel for Investors (if
different from the Company’s counsel and if such counsel is reasonably approved by the
Company) in connection with the preparation and filing of the Resale Registration Shelf (as
defined below), and up to $50,000 of reasonable legal expenses of one special counsel for
Investors (if different from the Company’s counsel and if such counsel is reasonably approved by
the Company) per underwritten public offering, blue sky fees and expenses, and expenses of any
regular or special audits incident to or required by any such registration, but shall not include
Selling Expenses.

(j)    “Registration Statement” means any registration statement of the Company filed with,
or to be filed with, the SEC under the Securities Act, including the related prospectus, amendments
and supplements to such registration statement, including pre- and post-effective amendments, and
all exhibits and all material incorporated by reference in such registration statement as may be
necessary to comply with applicable securities laws other than a registration statement (and related
prospectus) filed on Form S-4 or Form S-8 or any successor forms thereto.

(k)    “Rule 144” shall mean Rule 144 as promulgated by the Commission under the
Securities Act, as such rule may be amended from time to time, or any similar successor rule that
may be promulgated by the Commission.

(l)    “Securities Act” shall mean the Securities Act of 1933, as amended, or any similar

successor federal statute and the rules and regulations thereunder, all as the same shall be in effect
from time to time.

(m)    “Selling Expenses” shall mean all underwriting discounts and selling commissions

applicable to the sale of Registrable Securities, the fees and expenses of any legal counsel (except
as provided in the definition of “Registration Expenses”) and any other advisors any of

the Investors engage and all similar fees and commissions relating to the Investors’ disposition of
the Registrable Securities.

Section 2.
Resale Registration Rights

2.1.    Resale Registration Rights.

(a)    Following demand by any Investor, the Company shall file with the Commission a

Registration Statement on Form S-3 (except if the Company is not then eligible to register for
resale the Registrable Securities on Form S-3, in which case such registration shall be on another
appropriate form in accordance with the Securities Act) covering the resale of the Registrable
Securities by the Investors (the “Resale Registration Shelf”), and the Company shall file such
Resale Registration Shelf as promptly as reasonably practicable following such demand, and in any
event within sixty (60) days of such demand. Such Resale Registration Shelf shall include a “final”
prospectus, including the information required by Item 507 of Regulation S-K of the Securities
Act, as provided by the Investors in accordance with Section 2.7. Notwithstanding the foregoing,
before filing the Resale Registration Shelf, the Company shall furnish to the Investors a copy of
the Resale Registration Shelf and afford the Investors an opportunity to review and comment on
the Resale Registration Shelf. The Company’s obligation pursuant to this Section 2.1(a) is
conditioned upon the Investors providing the information contemplated in Section 2.7.

(b)    The Company shall use its reasonable best efforts to cause the Resale Registration
Shelf and related prospectuses to become effective as promptly as practicable after filing. The
Company shall use its reasonable best efforts to cause such Registration Statement to remain
effective under the Securities Act until the earlier of the date (i) all Registrable Securities covered
by the Resale Registration Shelf have been sold or may be sold freely without limitations or
restrictions as to volume or manner of sale pursuant to Rule 144 or (ii) all Registrable Securities
covered by the Resale Registration Shelf otherwise cease to be Registrable Securities pursuant
to the definition of Registrable Securities. The Company shall promptly, and within two
(2) business days after the Company confirms effectiveness of the Resale Registration Shelf with
the Commission, notify the Investors of the effectiveness of the Resale Registration Shelf.

(c)    Notwithstanding anything contained herein to the contrary, the Company shall not be

obligated to effect, or to take any action to effect, a registration pursuant to Section 2.1(a):

(i)    if the Company has and maintains an effective Registration Statement on

Form S-3ASR that provides for the resale of an unlimited number of securities by selling
stockholders (a “Company Registration Shelf”);

(ii)    during the period forty-five (45) days prior to the Company’s good faith

estimate of the date of filing of a Company Registration Shelf; or

(iii)    if the Company has caused a Registration Statement to become effective

pursuant to this Section 2.1 during the prior twelve (12) month period.

 
(d)    If the Company has a Company Registration Shelf in place at any time in which the

Investors make a demand pursuant to Section 2.1(a), the Company shall file with the Commission,
as promptly as practicable, and in any event within fifteen (15) business days after such demand, a
“final” prospectus supplement to its Company Registration Shelf covering the resale of the
Registrable Securities by the Investors (the “Prospectus”); provided, however, that the Company
shall not be obligated to file more than one Prospectus pursuant to this Section 2.1(d) in any six
month period to add additional Registrable Securities to the Company Registration Shelf that were
acquired by the Investors other than directly from the Company or in an underwritten public
offering by the Company. The Prospectus shall include the information required under Item 507 of
Regulation S-K of the Securities Act, which information shall be provided by the Investors in
accordance with Section 2.7. Notwithstanding the foregoing, before filing the Prospectus, the
Company shall furnish to the Investors a copy of the Prospectus and afford the Investors an
opportunity to review and comment on the Prospectus.

(e)    Deferral and Suspension. At any time after being obligated to file a Resale
Registration Shelf or Prospectus, or after any Resale Registration Shelf has become effective or a
Prospectus filed with the Commission, the Company may defer the filing of or suspend the use of
any such Resale Registration Shelf or Prospectus, upon giving written notice of such action to the
Investors with a certificate signed by the Principal Executive Officer of the Company stating that
in the good faith judgment of the Board, the filing or use of any such Resale Registration Shelf or
Prospectus covering the Registrable Securities would be seriously detrimental to the Company or
its stockholders at such time and that the Board concludes, as a result, that it is in the best interests
of the Company and its stockholders to defer the filing or suspend the use of such Resale
Registration Shelf or Prospectus at such time. The Company shall have the right to defer the filing
of or suspend the use of such Resale Registration Shelf or Prospectus for a period of not more than
one hundred twenty (120) days from the date the Company notifies the Investors of such deferral
or suspension; provided that the Company shall not exercise the right contained in
this Section 2.1(e) more than once in any twelve month period. In the case of the suspension of use
of any effective Resale Registration Shelf or Prospectus, the Investors, immediately upon receipt
of notice thereof from the Company, shall discontinue any offers or sales of Registrable Securities
pursuant to such Resale Registration Shelf or Prospectus until advised in writing by the Company
that the use of such Resale Registration Shelf or Prospectus may be resumed. In the case of a
deferred Prospectus or Resale Registration Shelf filing, the Company shall provide prompt written
notice to the Investors of (i) the Company’s decision to file or seek effectiveness of the Prospectus
or Resale Registration Shelf, as the case may be, following such deferral and (ii) in the case of a
Resale Registration Shelf, the effectiveness of such Resale Registration Shelf. In the case of either
a suspension of use of, or deferred filing of, any Resale Registration Shelf or Prospectus, the
Company shall not, during the pendency of such suspension or deferral, be required to take any
action hereunder (including any action pursuant to Section 2.2 hereof) with respect to the
registration or sale of any Registrable Securities pursuant to any such Resale Registration Shelf,
Company Registration Shelf or Prospectus.

(f)    Other Securities. Subject to Section 2.2(e) below, any Resale Registration Shelf or

Prospectus may include Other Securities, and may include securities of the Company being sold
for the account of the Company; provided such Other Securities are excluded first from such
Registration Statement in order to comply with any applicable laws or request from any
Government Entity, Nasdaq or any applicable listing agency. For the avoidance of doubt, no

Other Securities may be included in an underwritten offering pursuant to Section 2.2 without the
consent of the Investors.

2.2.    Sales and Underwritten Offerings of the Registrable Securities.

(a)    Notwithstanding any provision contained herein to the contrary, the Investors,

collectively, shall and subject to the limitations set forth in this Section 2.2, be permitted one
underwritten public offering per calendar year, but no more than three underwritten public
offerings in total, to effect the sale or distribution of Registrable Securities.

(b)    If the Investors intend to effect an underwritten public offering pursuant to a Resale

Registration Shelf or Company Registration Shelf to sell or otherwise distribute Registrable
Securities, they shall so advise the Company and provide as much notice to the Company as
reasonably practicable (and in any event not less than fifteen (15) business days prior to the
Investors’ request that the Company file a prospectus supplement to a Resale Registration Shelf or
Company Registration Shelf).

(c)    In connection with any offering initiated by the Investors pursuant to

this Section 2.2 involving an underwriting of shares of Registrable Securities, the Investors shall
be entitled to select the underwriter or underwriters for such offering, subject to the consent of the
Company, such consent not to be unreasonably withheld, conditioned or delayed.

(d)    In connection with any offering initiated by the Investors pursuant to

this Section 2.2 involving an underwriting of shares of Registrable Securities, the Company shall
not be required to include any of the Registrable Securities in such underwriting unless the
Investors (i) enter into an underwriting agreement in customary form with the underwriter or
underwriters, (ii) accept customary terms in such underwriting agreement with regard to
representations and warranties relating to ownership of the Registrable Securities and authority and
power to enter into such underwriting agreement and (iii) complete and execute all questionnaires,
powers of attorney, custody agreements, indemnities and other documents as may be requested by
such underwriter or underwriters. Further, the Company shall not be required to include any of the
Registrable Securities in such underwriting if (Y) the underwriting agreement proposed by the
underwriter or underwriters contains representations, warranties or conditions that are not
reasonable in light of the Company’s then-current business or (Z) the underwriter, underwriters or
the Investors require the Company to participate in any marketing, road show or comparable
activity that may be required to complete the orderly sale of shares by the underwriter or
underwriters.

(e)    If the total amount of securities to be sold in any offering initiated by the Investors

pursuant to this Section 2.2 involving an underwriting of shares of Registrable Securities exceeds
the amount that the underwriters determine in their sole discretion is compatible with the success
of the offering, then the Company shall be required to include in the offering only that number of
such securities, including Registrable Securities (subject in each case to the cutback provisions set
forth in this Section 2.2(e)), that the underwriters and the Company determine in their sole
discretion shall not jeopardize the success of the offering. If the underwritten public offering has
been requested pursuant to Section 2.2(a) hereof, the number of shares that are entitled to be
included in the registration and underwriting shall be allocated in the following manner: (a) first,

 
shares of Company equity securities that the Company desires to include in such registration shall
be excluded and (b) second, Registrable Securities requested to be included in such registration by
the Investors shall be excluded. To facilitate the allocation of shares in accordance with the above
provisions, the Company or the underwriters may round down the number of shares allocated to
any of the Investors to the nearest 100 shares.

2.3.    Fees and Expenses. All Registration Expenses incurred in connection with registrations
pursuant to this Agreement shall be borne by the Company. All Selling Expenses relating to
securities registered on behalf of the Investors shall be borne by the Investors.

2.4.    Registration Procedures. In the case of each registration of Registrable Securities effected by
the Company pursuant to Section 2.1 hereof, the Company shall keep the Investors advised as to
the initiation of each such registration and as to the status thereof. The Company shall use its
reasonable best efforts, within the limits set forth in this Section 2.4, to:

(a)    prepare and file with the Commission such amendments and supplements to such

Registration Statement and the prospectuses used in connection with such Registration Statement
as may be necessary to keep such Registration Statement effective and current and comply with the
provisions of the Securities Act with respect to the disposition of all securities covered by such
Registration Statement;

(b)    furnish to the Investors such numbers of copies of a prospectus, including preliminary
prospectuses, in conformity with the requirements of the Securities Act, and such other documents
as the Investors may reasonably request in order to facilitate the disposition of Registrable
Securities;

(c)    use its reasonable best efforts to register and qualify the Registrable Securities
covered by such Registration Statement under such other securities or blue sky laws of such
jurisdictions in the United States as shall be reasonably requested by the Investors, provided that
the Company shall not be required in connection therewith or as a condition thereto to qualify to
do business or to file a general consent to service of process in any such states or jurisdictions;

(d)    in the event of any underwritten public offering, and subject to Section 2.2(d), enter
into and perform its obligations under an underwriting agreement, in usual and customary form,
with the managing underwriter of such offering and take such other usual and customary action as
the Investors may reasonably request in order to facilitate the disposition of such Registrable
Securities;

(e)    notify the Investors at any time when a prospectus relating to a Registration Statement

covering any Registrable Securities is required to be delivered under the Securities Act of the
happening of any event as a result of which the prospectus included in such Registration
Statement, as then in effect, includes an untrue statement of a material fact or omits to state a
material fact required to be stated therein or necessary to make the statements therein not
misleading in the light of the circumstances then existing. The Company shall use its reasonable
best efforts to amend or supplement such prospectus in order to cause such prospectus not to
include any untrue statement of a material fact or omit to state a material fact required to

 
 
be stated therein or necessary to make the statements therein not misleading in the light of the
circumstances then existing;

(f)    provide a transfer agent and registrar for all Registrable Securities registered pursuant

to such Registration Statement and, if required, a CUSIP number for all such Registrable
Securities, in each case not later than the effective date of such registration;

(g)    if requested by an Investor, use reasonable best efforts to cause the Company’s
transfer agent to remove any restrictive legend from any Registrable Securities, within two
business days following such request;

(h)    cause to be furnished, at the request of the Investors, on the date that Registrable

Securities are delivered to underwriters for sale in connection with an underwritten offering
pursuant to this Agreement, (i) an opinion, dated such date, of the counsel representing the
Company for the purposes of such registration, in form and substance as is customarily given to
underwriters in an underwritten public offering, addressed to the underwriters, and (ii) a letter or
letters from the independent certified public accountants of the Company, in form and substance as
is customarily given by independent certified public accountants to underwriters in an underwritten
public offering, addressed to the underwriters; and

(i)    cause all such Registrable Securities included in a Registration Statement pursuant to

this Agreement to be listed on each securities exchange or other securities trading markets on
which Common Stock is then listed.

2.5.    The Investors Obligations.

(a)    Discontinuance of Distribution. The Investors agree that, upon receipt of any notice
from the Company of the occurrence of any event of the kind described in Section 2.4(e) hereof,
the Investors shall immediately discontinue disposition of Registrable Securities pursuant to any
Registration Statement covering such Registrable Securities until the Investors’ receipt of the
copies of the supplemented or amended prospectus contemplated by Section 2.4(e) hereof or
receipt of notice that no supplement or amendment is required and that the Investors’ disposition of
the Registrable Securities may be resumed. The Company may provide appropriate stop orders to
enforce the provisions of this Section 2.5(a).

(b)    Compliance with Prospectus Delivery Requirements. The Investors covenant and
agree that they shall comply with the prospectus delivery requirements of the Securities Act as
applicable to them or an exemption therefrom in connection with sales of Registrable Securities
pursuant to any Registration Statement filed by the Company pursuant to this Agreement.

(c)    Notification of Sale of Registrable Securities. The Investors covenant and agree that

they shall notify the Company following the sale of Registrable Securities to a third party as
promptly as reasonably practicable, and in any event within thirty (30) days, following the sale of
such Registrable Securities.

 
2.6.    Indemnification.

(a)    To the extent permitted by law, the Company shall indemnify the Investors, and, as
applicable, their officers, directors, and constituent partners, legal counsel for each Investor and
each Person controlling the Investors, with respect to which registration, related qualification, or
related compliance of Registrable Securities has been effected pursuant to this Agreement, and
each underwriter, if any, and each Person who controls any underwriter within the meaning of the
Securities Act against all claims, losses, damages, or liabilities (or actions in respect thereof) to the
extent such claims, losses, damages, or liabilities arise out of or are based upon (i) any untrue
statement (or alleged untrue statement) of a material fact contained in any prospectus or other
document (including any related Registration Statement) incident to any such registration,
qualification, or compliance, or (ii) any 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
(iii) 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 applicable to the Company and relating to action or
inaction required of the Company in connection with any such registration, qualification, or
compliance; and the Company shall pay as incurred to the Investors, each such underwriter, and
each Person who controls the Investors or underwriter, any legal and any other expenses
reasonably incurred in connection with investigating or defending any such claim, loss, damage,
liability, or action; provided, however, that the indemnity contained in this Section 2.6(a) shall not
apply to amounts paid in settlement of any such claim, loss, damage, liability, or action if
settlement is effected without the consent of the Company (which consent shall not unreasonably
be withheld); and provided, further, that the Company shall not be liable in any such case to the
extent that any such claim, loss, damage, liability, or expense arises out of or is based upon any
violation by such Investor of the obligations set forth in Section 2.5 hereof or any untrue statement
or omission contained in such prospectus or other document based upon written information
furnished to the Company by the Investors, such underwriter, or such controlling Person and stated
to be for use therein.

(b)    To the extent permitted by law, each Investor (severally and not jointly) shall, if

Registrable Securities held by such Investor are included for sale in the registration and related
qualification and compliance effected pursuant to this Agreement, indemnify the Company, each of
its directors, each officer of the Company who signs the applicable Registration Statement, each
legal counsel and each underwriter of the Company’s securities covered by such a Registration
Statement, each Person who controls the Company or such underwriter within the meaning of the
Securities Act against all claims, losses, damages, and liabilities (or actions in respect thereof)
arising out of or based upon (i) any untrue statement (or alleged untrue statement) of a material
fact contained in any such Registration Statement, or related document, or (ii) any 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 (iii) any violation or alleged violation by such Investor
of Section 2.5 hereof, 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
applicable to such Investor and relating to action or inaction required of such Investor in
connection with any such registration and related qualification and compliance, and shall pay as
incurred to such persons, any legal and any other expenses reasonably incurred in connection with
investigating or defending any such claim, loss,

damage, liability, or action, in each case only to the extent that such untrue statement (or alleged
untrue statement) or omission (or alleged omission) is made in (and such violation pertains to)
such Registration Statement or related document in reliance upon and in conformity with written
information furnished to the Company by such Investor and stated to be specifically for use
therein; provided, however, that the indemnity contained in this Section 2.6(b) shall not apply to
amounts paid in settlement of any such claim, loss, damage, liability, or action if settlement is
effected without the consent of such Investor (which consent shall not unreasonably be withheld);
provided, further, that such Investor’s liability under this Section 2.6(b) (when combined with any
amounts such Investor is liable for under Section 2.6(d)) shall not exceed such Investor’s net
proceeds from the offering of securities made in connection with such registration.

(c)    Promptly after receipt by an indemnified party under this Section 2.6 of notice of the

commencement of any action, such indemnified party shall, if a claim in respect thereof is to be
made against an indemnifying party under this Section 2.6, notify the indemnifying party in
writing of the commencement thereof and generally summarize such action. The indemnifying
party shall have the right to participate in and to assume the defense of such
claim; provided, however, that the indemnifying party shall be entitled to select counsel for the
defense of such claim with the approval of any parties entitled to indemnification, which approval
shall not be unreasonably withheld; provided further, however, that if either party reasonably
determines that there may be a conflict between the position of the Company and the Investors in
conducting the defense of such action, suit, or proceeding by reason of recognized claims for
indemnity under this Section 2.6, then counsel for such party shall be entitled to conduct the
defense to the extent reasonably determined by such counsel to be necessary to protect the interest
of such party. The failure to notify an indemnifying party promptly of the commencement of any
such action, if prejudicial to the ability of the indemnifying party to defend such action, shall
relieve such indemnifying party, to the extent so prejudiced, of any liability to the indemnified
party under this Section 2.6, but the omission so to notify the indemnifying party shall not relieve
such party of any liability that such party may have to any indemnified party otherwise than under
this Section 2.6.

(d)    If the indemnification provided for in this Section 2.6 is held by a court of competent

jurisdiction to be unavailable to an indemnified party with respect to any loss, liability, claim,
damage, or expense referred to therein, then the indemnifying party, in lieu of indemnifying such
indemnified party hereunder, shall contribute to the amount paid or payable by such indemnified
party as a result of such loss, liability, claim, damage, or expense 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 statements or omissions that resulted in such
loss, liability, claim, damage, or expense as well as any other relevant equitable considerations.
The relative fault of the indemnifying party and of the indemnified party shall be determined 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. In no event, however, shall (i) any
amount due for contribution hereunder be in excess of the amount that would otherwise be due
under Section 2.6(a) or Section 2.6(b), as applicable, based on the limitations of such provisions
and (ii) a Person guilty of fraudulent misrepresentation (within the

meaning of the Securities Act) be entitled to contribution from a Person who was not guilty of such
fraudulent misrepresentation.

(e)    Notwithstanding the foregoing, to the extent that the provisions on indemnification

and contribution contained in the underwriting agreement entered into in connection with an
underwritten public offering are in conflict with the foregoing provisions, the provisions in the
underwriting agreement shall control; provided, however, that the failure of the underwriting
agreement to provide for or address a matter provided for or addressed by the foregoing provisions
shall not be a conflict between the underwriting agreement and the foregoing provisions.

(f)    The obligations of the Company and the Investors under this Section 2.6 shall survive

the completion of any offering of Registrable Securities in a Registration Statement under this
Agreement or otherwise.

2.7.    Information. The Investors shall furnish to the Company such information regarding the
Investors and the distribution proposed by the Investors as the Company may reasonably request
and as shall be reasonably required in connection with any registration referred to in this
Agreement. The Investors agree to, as promptly as practicable (and in any event prior to any sales
made pursuant to a prospectus), furnish to the Company all information required to be disclosed in
order to make the information previously furnished to the Company by the Investors not
misleading. The Investors agree to keep confidential the receipt of any notice received pursuant
to Section 2.4(e) and the contents thereof, except as required pursuant to applicable law.
Notwithstanding anything to the contrary herein, the Company shall be under no obligation to
name the Investors in any Registration Statement if the Investors have not provided the
information required by this Section 2.7 with respect to the Investors as a selling securityholder in
such Registration Statement or any related prospectus.

2.8.    Rule 144 Requirements. With a view to making available to the Investors the benefits of
Rule 144 promulgated under the Securities Act and any other rule or regulation of the Commission
that may at any time permit the Investors to sell Registrable Securities to the public without
registration, the Company agrees to use its reasonable best efforts to:

(a)    make and keep public information available, as those terms are understood and

defined in Rule 144 under the Securities Act at all times after the date hereof;

(b)    file with the Commission in a timely manner all reports and other documents required

of the Company under the Securities Act and the Exchange Act;

(c)    prior to the filing of the Registration Statement or any amendment thereto
(whether pre-effective or post-effective), and prior to the filing of any prospectus or prospectus
supplement related thereto, to provide the Investors with copies of all of the pages thereof (if any)
that reference the Investors; and

(d)    furnish to any Investor, so long as the Investor owns any Registrable Securities,
forthwith upon request (i) a written statement by the Company that it has complied with the
reporting requirements of Rule 144, (ii) a copy of the most recent annual or quarterly report of the
Company and such other reports and documents so filed by the Company, and (iii) such other

information as may be reasonably requested by an Investor in availing itself of any rule or
regulation of the Commission which permits an Investor to sell any such securities without
registration.

Section 3.
Miscellaneous

3.1.    Amendment. No amendment, alteration or modification of any of the provisions of this
Agreement shall be binding unless made in writing and signed by each of the Company and the
Investors.

3.2.    Injunctive Relief. It is hereby agreed and acknowledged that it shall be impossible to
measure in money the damages that would be suffered if the parties fail to comply with any of the
obligations herein imposed on them and that in the event of any such failure, an aggrieved Person
shall be irreparably damaged and shall not have an adequate remedy at law. Any such Person shall,
therefore, be entitled (in addition to any other remedy to which it may be entitled in law or in
equity) to injunctive relief, including, without limitation, specific performance, to enforce such
obligations, and if any action should be brought in equity to enforce any of the provisions of this
Agreement, none of the parties hereto shall raise the defense that there is an adequate remedy at
law.

3.3.    Notices. All notices required or permitted under this Agreement must be in writing and sent
to the address or facsimile number identified below. Notices must be given: (a) by personal
delivery, with receipt acknowledged; (b) by facsimile followed by hard copy delivered by the
methods under clause (c) or (d); (c) by prepaid certified or registered mail, return receipt requested;
or (d) by prepaid reputable overnight delivery service. Notices shall be effective upon receipt.
Either party may change its notice address by providing the other party written notice of such
change. Notices shall be delivered as follows:

If to the Investors:   At such Investor’s address as set forth on Schedule A hereto

If to the Company:

Idera Pharmaceuticals, Inc.
505 Eagleview Blvd., Suite 212
Exton, Pennsylvania 19341
Attn: Chief Financial Officer
Attn: General Counsel

with a copy to:

Morgan, Lewis & Bockius LLP
1701 Market Street
Philadelphia, Pennsylvania 19103-2921
Attn: Joanne R. Soslow, Esq.

3.4.    Governing Law; Jurisdiction; Venue; Jury Trial.

(a)    This Agreement shall be governed by, and construed in accordance with, the law of

the State of New York without giving effect to any choice or conflict of law provision or rule

 
 
 
   
 
  
 
  
 
(whether of the State of New York or any other jurisdiction) that would cause the application of the
laws of any jurisdiction other than the State of New York.

(b)    Each of the Company and the Investors irrevocably and unconditionally submits, for

itself and its property, to the nonexclusive jurisdiction of the courts of the State of New York
sitting in the Borough of Manhattan, New York and of the United States District Court of the
Southern District of New York, and any appellate court from any thereof, in any action or
proceeding arising out of or relating to this Agreement and the transactions contemplated herein, or
for recognition or enforcement of any judgment, and each of the Company and the Investors
irrevocably and unconditionally agrees that all claims in respect of any such action or proceeding
may be heard and determined in such New York state court or, to the fullest extent permitted by
applicable law, in such federal court. Each of the Company and the Investors hereto agrees that a
final judgment in any such action or proceeding shall be conclusive and may be enforced in other
jurisdictions by suit on the judgment or in any other manner provided by law.

(c)    Each of the Company and the Investors irrevocably and unconditionally waives, to the

fullest extent permitted by applicable law, any objection that it may now or hereafter have to the
laying of venue of any action or proceeding arising out of or relating to this Agreement and the
transactions contemplated herein in any court referred to in Section 3.4(b) hereof. Each of the
Company and the Investors hereby irrevocably waives, to the fullest extent permitted by applicable
law, the defense of an inconvenient forum to the maintenance of such action or proceeding in any
such court.

(d)    EACH OF THE COMPANY AND THE INVESTORS HEREBY IRREVOCABLY
WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT
IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR
INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE
TRANSACTIONS CONTEMPLATED HEREBY (WHETHER BASED ON CONTRACT, TORT
OR ANY OTHER THEORY). EACH OF THE COMPANY AND THE INVESTORS
(A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER
PERSON HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER
PERSON WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE
FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT EACH OF THE COMPANY AND
THE INVESTORS HAS BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY,
AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS
SECTION.

3.5.    Successors, Assigns and Transferees. Any and all rights, duties and obligations hereunder
shall not be assigned, transferred, delegated or sublicensed by any party hereto without the prior
written consent of the other party; provided, however, that the Investors shall be entitled to transfer
Registrable Securities to one or more of their affiliates and, solely in connection therewith, may
assign their rights hereunder in respect of such transferred Registrable Securities, in each case, so
long as such Investor is not relieved of any liability or obligations hereunder, without the prior
consent of the Company. Any transfer or assignment made other than as provided in the first
sentence of this Section 3.5 shall be null and void. Subject to the foregoing and except as otherwise
provided herein, the provisions of this Agreement shall inure to the benefit of, and be binding
upon, the successors, permitted assigns, heirs, executors and

administrators of the parties hereto. The Company shall not consummate any recapitalization,
merger, consolidation, reorganization or other similar transaction whereby stockholders of the
Company receive (either directly, through an exchange, via dividend from the Company or
otherwise) equity (the “Other Equity”) in any other entity (the “Other Entity”) with respect to
Registrable Securities hereunder, unless prior to the consummation thereof, the Other Entity
assumes, by written instrument, the obligations under this Agreement with respect to such Other
Equity as if such Other Equity were Registrable Securities hereunder.

3.6.    Entire Agreement. This Agreement, together with any exhibits hereto, constitute the entire
agreement between the parties relating to the subject matter hereof and all previous agreements or
arrangements between the parties, written or oral, relating to the subject matter hereof are
superseded.

3.7.    Waiver. No failure on the part of either party hereto to exercise any power, right, privilege or
remedy under this Agreement, and no delay on the part of either party hereto in exercising any
power, right, privilege or remedy under this Agreement, shall operate as a waiver thereof; and no
single or partial exercise of any such power, right, privilege or remedy shall preclude any other or
further exercise thereof or of any other power, right, privilege or remedy.

3.8.    Severability. If any part of this Agreement is declared invalid or unenforceable by any court
of competent jurisdiction, such declaration shall not affect the remainder of the Agreement and the
invalidated provision shall be revised in a manner that shall render such provision valid while
preserving the parties’ original intent to the maximum extent possible.

3.9.    Titles and Subtitles. The titles and subtitles used in this Agreement are used for convenience
only and are not to be considered in construing or interpreting this Agreement. All references in
this Agreement to sections, paragraphs and exhibits shall, unless otherwise provided, refer to
sections and paragraphs hereof and exhibits attached hereto.

3.10.    Counterparts. This Agreement may be executed in any number of counterparts, each of
which shall be enforceable against the parties that execute such counterparts (including by
facsimile or other electronic means), and all of which together shall constitute one instrument.

3.11.    Term and Termination. The Investors’ rights to demand the registration of the Registrable
Securities under this Agreement, as well as the Company’s obligations hereunder other than
pursuant to Section 2.6 hereof, shall terminate automatically once all Registrable Securities cease
to be Registrable Securities pursuant to the terms of this Agreement.

[Remainder of Page Intentionally Left Blank; Signature Page Follows]

 
IN WITNESS WHEREOF, the parties hereto have executed this Registration Rights

Agreement effective as of the day, month and year first above written.

IDERA PHARMACEUTICALS, INC.

By: /s/ Vincent J. Milano
Name: Vincent J. Milano
Title: Chief Executive Officer

 
 
 
 
 
 
 
 
 
 
IN WITNESS WHEREOF, the parties hereto have executed this Registration Rights

Agreement effective as of the day, month and year first above written.

667, L.P.

By:  BAKER BROS. ADVISORS LP, management
company and investment adviser to 667, L.P.,
pursuant to authority granted to it by Baker Biotech
Capital, L.P., general partner  to 667, L.P., and not as
the general partner.

By: /s/ Scott L. Lessing
Scott L. Lessing
President

BAKER BROTHERS LIFE SCIENCES, L.P.

By:  BAKER BROS. ADVISORS LP, management
company and investment adviser to Baker Brothers
Life Sciences, L.P., pursuant to authority granted to it
by Baker Brothers Life Sciences Capital, L.P., general
partner  to Baker Brothers Life Sciences, L.P., and not
as the general partner.

By: /s/ Scott L. Lessing
Scott L. Lessing
President

[Signature Page to Registration Rights Agreement]

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Schedule A

The Investors

667, L.P.
BAKER BROTHERS LIFE SCIENCES, L.P.

 
Exhibit 4.12

Execution Copy

VOTING AGREEMENT

THIS VOTING AGREEMENT (this “Agreement”) is entered into as of December 23,
2019, by and among the investors who are signatories hereto (each, an “Investor” and collectively,
the “Investors”) and Idera Pharmaceuticals, Inc., a Delaware corporation (the “Company”).
Capitalized terms used herein but not otherwise defined shall have the meaning given to them in
the Purchase Agreement (as defined below).

BACKGROUND

The execution and delivery of this Agreement by the Investors is a material inducement

to the willingness of the Company to enter into that certain Securities Purchase Agreement, dated
as of the date hereof (the “Purchase Agreement”), by and among the Company and the Investors,
pursuant to which, subject to the terms and conditions set forth in the Purchase Agreement, the
Investors may purchase Securities.

In consideration of the promises and the covenants and agreements set forth in the Purchase
Agreement and in this Agreement, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows:

1.    Shares Subject to this Agreement. The Investors each agree to hold all shares of voting
capital stock of the Company registered in their respective names or beneficially owned by them
and/or over which they exercise voting control as of the date of this Agreement and any other
shares of voting capital stock of the Company legally or beneficially held or acquired by them after
the date hereof or over which they exercise voting control (the “Shares”) subject to, and to vote
the Shares in accordance with, the provisions of this Agreement.

2.    Agreement to Vote Shares.

(a)    In any annual, special or adjourned meeting of the stockholders of the Company at

which the matter covered by the Required Shareholder Approval are presented to the Company’s
stockholders for approval, each Investor agrees that it will vote, by proxy or otherwise, its Shares
(i) in favor of such matter and any matter that would reasonably be expected to facilitate such
Required Shareholder Approval, and (ii) against approval of any proposal made in opposition to
such matters. Each Investor shall retain at all times the right to vote its Shares in its sole discretion
and without any other limitation on those matters other than those set forth in clauses (i) and (ii) of
this Section 2(a) that are at any time or from time to time presented for consideration to the
Company’s stockholders generally.

(b)    In the event that a meeting of the stockholders of the Company is held, each

Investor shall, or shall cause the holder of record on any applicable record date to, appear at such
meeting or otherwise cause such Investor’s Shares to be counted as present thereat for purposes of
establishing a quorum.

 
 
 
 
3.    Representations, Warranties and Other Covenants of Investor. Each Investor, as to

itself and not with respect to any other Investor, hereby represents, warrants and covenants to the
Company as follows:

(a)    Such Investor has all requisite power, legal capacity and authority to enter into

this Agreement. This Agreement has been duly executed and delivered by Investor and, assuming
the due authorization, execution and delivery of this Agreement by the Company, constitutes a
valid and binding obligation of Investor, enforceable against Investor in accordance with its terms,
except as limited by (a) applicable bankruptcy, insolvency, reorganization, moratorium, and other
laws of general application affecting enforcement of creditors’ rights generally, and (b) laws
relating to the availability of specific performance, injunctive relief or other equitable remedies.

(b)    The execution, delivery and performance of this Agreement by such Investor will
not (i) conflict with, require a consent, waiver or approval under, or result in a breach of or default
under, any of the terms of any agreement to which Investor is a party or by which any of such
Investor’s assets are bound or (ii) violate any order, writ, injunction, decree, judgment or any
applicable law applicable to such Investor or any of its assets, except for any such conflict,
violation or any failure to obtain such consent, waiver or approval that would not result in such
Investor being able to perform its obligations under this Agreement.

(c)    Such Investor shall not, directly or indirectly, take any action that would make any

representation or warranty contained herein untrue or incorrect in any material respects or in any
way have the effect of restricting, limiting, interfering with, preventing or disabling such Investor
from performing his, her or its obligations in any material respects under this Agreement.

4.    No Ownership Interest. Nothing contained in this Agreement shall be deemed to vest
in the Company any direct or indirect ownership or incidence of ownership of or with respect to
any Shares.

5.    Miscellaneous.

(a)    Notices. All notices, requests, and other communications hereunder shall be in
writing and will be deemed to have been duly given and received (a) when personally delivered,
(b) when sent by facsimile or email upon confirmation of receipt, (c) one business day after the day
on which the same has been delivered prepaid to a nationally recognized courier service, or (d) five
business days after the deposit in the United States mail, registered or certified, return receipt
requested, postage prepaid, in each case addressed, as to the Company, to:

Idera Pharmaceuticals, Inc.
505 Eagleview Blvd., Suite 212
Exton, Pennsylvania 19341
Attn: General Couunsel

  with copy to:
  Morgan, Lewis & Bockius LLP
  1701 Market Street
  Philadelphia, Pennsylvania 19103-2921
  Attn: Joanne R. Soslow, Esq.
  Morgan, Lewis & Bockius LLP

 
 
   
 
 
 
and as to any Investor, at the address set forth below such Investor’s signature on the signature
pages of this Agreement. Any party hereto from time to time may change its address, facsimile
number, or other information for the purpose of notices to that party by giving notice specifying
such change to the other parties hereto. Each Investor and the Company may each agree in writing
to accept notices and other communications to it hereunder by electronic communications pursuant
to procedures reasonably approved by it; provided that approval of such procedures may be limited
to particular notices or communications.

(b)    Amendments; Waiver. This Agreement may be amended by the parties hereto, and
the terms and conditions hereof may be waived, only by an instrument in writing and signed by the
Company and the Investors. The failure of any party hereto to exercise any right, power or remedy
provided under this Agreement or otherwise available in respect of this Agreement at law or in
equity, or to insist upon compliance by any other party with its obligation under this Agreement,
and any custom or practice of the parties at variance with the terms of this Agreement, shall not
constitute a waiver by such party of such party’s right to exercise any such or other right, power or
remedy or to demand such compliance.

(c)    Rules of Construction. The parties hereto hereby waive the application of any law,

regulation, holding or rule of construction providing that ambiguities in an agreement or other
document will be construed against the party drafting such agreement or document.

(d)    Counterparts. This Agreement may be executed in one or more counterparts, all
of which shall be considered one and the same instrument and shall become effective when one or
more counterparts have been signed by each of the parties and delivered to the other parties hereto;
it being understood that all parties need not sign the same counterpart.

(e)    Specific Performance; Injunctive Relief. The parties hereto agree that the

Company will be irreparably harmed and that there will be no adequate remedy at law for a
violation of any of the covenants or agreements of any Investor set forth herein. Therefore, it is
agreed that, in addition to any other remedies that may be available to the Company upon any such
violation of this Agreement, the Company and the Investors shall have the right to enforce such
covenants and agreements by specific performance, injunctive relief or by any other means
available to the Company or the Investors at law or in equity and each Investor hereby waives any
and all defenses which could exist in its favor in connection with such enforcement and waives any
requirement for the security or posting of any bond in connection with such enforcement.

(f)    Additional Documents. Investor shall execute and deliver any additional

documents necessary or desirable in the reasonable opinion of the Company to carry out the
purpose and intent of this Agreement.

(g)    Severability. In the event that any provision of this Agreement, or the application

thereof, becomes or is declared by a court of competent jurisdiction to be illegal, void or
unenforceable, the remainder of this Agreement shall continue in full force and effect and the
application of such provision to other persons or circumstances shall be interpreted so as
reasonably to effect the intent of the parties hereto. The parties hereto further agree to use their
commercially reasonable efforts to replace such void or unenforceable provision of this

 
Agreement with a valid and enforceable provision that shall achieve, to the extent possible, the
economic, business and other purposes of such void or unenforceable provision.

(h)    Governing Law; Consent to Jurisdiction. This Agreement, and the provisions,

rights, obligations, and conditions set forth herein, and the legal relations between the parties
hereto, including all disputes and claims, whether arising in contract, tort, or under statute, shall be
governed by and construed in accordance with the laws of the State of New York without giving
effect to its conflict of law provisions.

(i)    Expenses. All costs and expenses incurred in connection with this Agreement and

the transactions contemplated hereby shall be paid by the party incurring the expenses.

(j)    Termination. This Agreement shall terminate and shall have no further force or

effect from and after the earlier to occur of (i) date upon which the Company receives the Required
Shareholder Approval, (ii) the termination of the Purchase Agreement in accordance with its terms
and (iii) December 31, 2020, and thereafter there shall be no liability or obligation on the part of
the Investors, provided, that no such termination shall relieve any party from liability for any
willful or intentional breach of this Agreement prior to such termination.

(k)    WAIVER OF JURY TRIAL. EACH OF THE PARTIES HERETO HEREBY

IRREVOCABLY WAIVES ALL RIGHT TO TRIAL BY JURY IN ANY ACTION,
PROCEEDING OR COUNTERCLAIM (WHETHER BASED ON CONTRACT, TORT, OR
OTHERWISE) ARISING OUT OF OR RELATING TO THIS AGREEMENT OR THE
ACTIONS OF ANY PARTY HERETO IN NEGOTIATION, ADMINISTRATION,
PERFORMANCE OR ENFORCEMENT HEREOF.

 
IN WITNESS WHEREOF, the parties hereto have caused

this VOTING AGREEMENT to be executed as of the date first written above.

IDERA PHARMACEUTICALS, INC.

By: /s/ Vincent J. Milano
Name: Vincent J. Milano
Title: Chief Executive Officer

 
 
 
 
 
 
 
 
 
 
 
IN WITNESS WHEREOF, the parties hereto have caused

this VOTING AGREEMENT to be executed as of the date first written above.

667, L.P.

By:  BAKER BROS. ADVISORS LP, management
company and investment adviser to 667, L.P.,
pursuant to authority granted to it by Baker Biotech
Capital, L.P., general partner  to 667, L.P., and not as
the general partner.

By: /s/ Scott L. Lessing
Scott L. Lessing
President

BAKER BROTHERS LIFE SCIENCES, L.P.

By:  BAKER BROS. ADVISORS LP, management
company and investment adviser to Baker Brothers
Life Sciences, L.P., pursuant to authority granted to
it by Baker Brothers Life Sciences Capital, L.P.,
general partner  to Baker Brothers Life Sciences,
L.P., and not as the general partner.

By: /s/ Scott L. Lessing
Scott L. Lessing
President

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 4.13

Execution Copy

WARRANT AMENDMENT AGREEMENT

This  Warrant  Amendment  Agreement  (this  “Agreement”),  dated  as  of  December  23,  2019  (the
“Effective Date”), by and between Idera Pharmaceuticals, Inc., a Delaware corporation (the “Company”),
and  each  of  the  entities  list  on  Schedule  I  hereto,  as  the  Requisite  Holders  (as  defined  below).    All
capitalized  terms  used  in  this  Agreement  but  not  otherwise  defined  herein  shall  have  the  respective
meanings ascribed to such terms in the Warrants (as defined below).

WHEREAS, on May 7, 2013, the Company issued to the Requisite Holders those certain Warrants
to Purchase Common Stock to purchase shares of the Company’s common stock, par value $0.001 per share
(the “Common Stock”), at an exercise price equal to $0.08 per share (the “First Warrants”);

WHEREAS,  on  September  30,  2013,  the  Company  issued  to  the  Requisite  Holders  those  certain
Warrants  to  Purchase  Common  Stock  to  purchase  shares  of  Common  Stock  at  an  exercise  price  equal  to
$0.08 per share (the “Second Warrants”);

WHEREAS,  on  February  10,  2014,  the  Company  issued  to  the  Requisite  Holders  those  certain
Warrants  to  Purchase  Common  Stock  to  purchase  shares  of  Common  Stock  at  an  exercise  price  equal  to
$0.08  per  share  (the  “Third  Warrants”,  and  together  with  the  First  Warrants  and  Second  Warrants,  the
“Warrants”);

WHEREAS, the Warrants were initially issued in the name of Piper Jaffray & Co.;

WHEREAS, the Warrants were transferred to be held as Global Warrant Agreements with a CUSIP

in DTC;

WHEREAS, Section 16(d) of the First Warrants and Section 15(d) of the Second Warrants and the
Third Warrants requires the written consent of the holders representing no less than a majority of the interest
(based upon the number of Warrant Shares issuable upon exercise) of the outstanding Warrants, to amend or
waive any terms of each of the Warrants (the “Requisite Holders”);

WHEREAS, the undersigned constitute the Requisite Holders to amend each of the Warrants as the

owner of a majority of the interest in the Warrants; and

WHEREAS, the Company and the Requisite Holder have agreed to amend and restate the Warrants

to provide that such Warrants will be exercisable indefinitely.

NOW, THEREFORE, in consideration of the foregoing and the promises and covenants contained
herein,  and  other  good  and  valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
acknowledged, and intending to be legally bound hereby, the undersigned hereby agree as follows:

1.

  Amendment  and  Restatement  of  the  First  Warrants.    Effective  upon  the  Effective  Date,

each of the First Warrants shall be amended and restated in the form attached hereto as Exhibit A.

2.

 Amendment and Restatement of the Second Warrants.  Effective upon the Effective Date,

each of the Second Warrants shall be amended and restated in the form attached hereto as Exhibit B.

3.

 Amendment  and  Restatement  of  the  Third  Warrants.    Effective  upon  the  Effective  Date,

each of the Third Warrants shall be amended and restated in the form attached hereto as Exhibit C.

 
 
4.

  Governing  Law.        In  all  respects,  including  all  matters  of  construction,  validity  and
performance, this Agreement and the obligations arising hereunder shall be governed by, and construed and
enforced  in  accordance  with,  the  laws  of  the  State  of  New  York  (without  regard  to  its  conflicts  of  law
principals) applicable to contracts made and performed in such state.

5.

 Counterparts; Facsimile.  This Agreement may be executed in any number of counterparts,
each of which shall be an original, but all of which together shall be deemed to constitute one instrument.
Delivery of an executed signature page to this Agreement by facsimile or any other electronic transmission
shall be as effective as delivery of a manually signed counterpart hereof.

6.

 Titles and Subtitles Headings.  The titles of the sections and subsections of this Agreement

are for convenience of reference only and are not to be considered in construing this Agreement.

7.

  Severability  of  this  Agreement.    If  any  provision  of  this  Agreement  shall  be  judicially
determined to be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

8.

 Further Assurances.   At  any  time  or  from  time  to  time  after  the  date  hereof,  the  parties
agree to cooperate with each other, and at the request of any other party, to execute and deliver any further
instruments or documents and to take all such further action as the other party may reasonably request in
order to evidence or effectuate the consummation of the transactions contemplated hereby and to otherwise
carry out the intent of the parties hereunder.

9.

  Entire  Agreement.    This  Agreement  embodies  the  entire  agreement  and  understanding
among  the  parties  hereto  and  supersedes  all  prior  or  contemporaneous  agreements  and  understandings  of
such parties, verbal or written, relating to the subject matter hereof.

[Remainder of Page Intentionally Left Blank]

 
 
 
 
IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by

their respective authorized officers as of the date first above written.

COMPANY:

IDERA PHARMACEUTICALS, INC.

By: /s/ Bryant D. Lim
Name: Bryant D. Lim
Title: Senior Vice President, General Counsel

[Signature Page to Warrant Amendment Agreement]

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by

their respective authorized officers as of the date first above written.

REQUISITE HOLDERS:

667, L.P.

By:  BAKER BROS. ADVISORS LP,
management company and investment adviser to
667, L.P., pursuant to authority granted to it by
Baker Biotech Capital, L.P., general partner to 667,
L.P., and not as the general partner.

By: /s/ Scott L. Lessing
Scott L. Lessing
President

BAKER BROTHERS LIFE SCIENCES, L.P.

By:  BAKER BROS. ADVISORS LP,
management company and investment adviser to
Baker Brothers Life Sciences, L.P., pursuant to
authority granted to it by Baker Brothers Life
Sciences Capital, L.P., general partner  to Baker
Brothers Life Sciences, L.P., and not as the general
partner.

By: /s/ Scott L. Lessing
Scott L. Lessing
President

[Signature Page to Warrant Amendment Agreement]

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SCHEDULE I

Requisite Holder

667, L.P.

667, L.P.

667, L.P.

Issue Date

May 7, 2013

September 30, 2013

February 10, 2014

Baker Brothers Life Sciences, L.P.

May 7, 2013

Baker Brothers Life Sciences, L.P.

September 30, 2013

Baker Brothers Life Sciences, L.P.

February 10, 2014

 
 
 
 
 
Exhibit A

Amendment and Restatement of the First Warrant

 
THE  WARRANTS  INITIALLY  WILL  BE  REPRESENTED  BY  ONE  OR  MORE  PERMANENT  GLOBAL  CERTIFICATES  IN
FULLY REGISTERED FORM AND WILL BE DEPOSITED WITH A CUSTODIAN FOR, AND REGISTERED IN THE NAME OF,
A NOMINEE OF THE DEPOSITORY TRUST COMPANY, NEW YORK, NEW YORK (“DTC”), AS DEPOSITARY.

IDERA PHARMACEUTICALS, INC.

FORM OF AMENDED AND RESTATED WARRANT TO PURCHASE COMMON STOCK

Warrant No. [●]

Number of Shares: [●]
(subject to adjustment)
Original Issue Date: May 7, 2013
Re-issue Date: July 27, 2018
Amendment Date: December [●], 2019

Idera Pharmaceuticals, Inc., a Delaware corporation (the “Company”), hereby certifies that, for good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, [●] or its permitted registered assigns (the “Holder”), is entitled, subject to
the terms set forth below, to purchase from the Company up to a total of [●] shares of common stock, $0.001 par value per share (the
“Common Stock”), of the Company (each such share, a “Warrant Share” and all such shares, the “Warrant Shares”) at an exercise price
per share equal to $0.08 per share (as adjusted from time to time as provided in Section 9 herein, the “Exercise Price”), upon surrender
of this Warrant to Purchase Common Stock (including any Warrants to Purchase Common Stock issued in exchange, transfer or
replacement hereof, the “Warrant”) at any time and from time to time on or after the date hereof (the “Original Issue Date”), and subject
to the following terms and conditions:

1.  Definitions. For purposes of this Warrant, the following terms shall have the following meanings:

(a)  “Commission” means the United States Securities and Exchange Commission.

(b)  “Closing Sale Price” means, for any security as of any date, the last trade price for such security on the Principal Trading

Market for such security, as reported by Bloomberg Financial Markets, or, if such Principal Trading Market begins to operate on an
extended hours basis and does not designate the last trade price, then the last trade price of such security prior to 4:00 P.M., New York
City time, as reported by Bloomberg Financial Markets, or if the foregoing do not apply, the last trade price of such security in the
over-the-counter market on the electronic bulletin board for such security as reported by Bloomberg Financial Markets, or, if no last
trade price is reported for such security by Bloomberg Financial Markets, the average of the bid and ask prices, of any market makers
for such security as reported in the “pink sheets” by Pink Sheets LLC. If the Closing Sale Price cannot be calculated for a security on a
particular date on any of the foregoing bases, the Closing Sale Price of such security on such date shall be the fair market value as
mutually determined by the Company and the Holder. If the Company and the Holder are unable to agree upon the fair market value of
such security, then the Board of Directors of the Company shall use its good faith judgment to determine the fair market value. The
Board of Directors’ determination shall be binding upon all parties absent demonstrable error. All such determinations shall be
appropriately adjusted for any stock dividend, stock split, stock combination or other similar transaction during the applicable
calculation period.

(c)

 “Principal Trading Market” means the Trading Market on which the Common Stock is primarily listed on and quoted

for trading, which, as of the Original Issue Date shall be the Nasdaq Capital Market.

(d)  “Registration Statement” means the Company’s Registration Statement on Form S-1, as amended (File No. 333- 187155),

initially filed on March 11, 2013.

(e)  “Securities Act” means the Securities Act of 1933, as amended.

(f)

“Transfer Agent” means Computershare Shareowner Services LLC, the Company’s transfer agent for the Common Stock and
Warrants.

2.  Registration of Warrants. The Company shall register this Warrant, upon records to be maintained by the Company for that purpose
(the “Warrant Register”), in the name of the record Holder (which shall include the initial Holder or, as the case may be, any registered
assignee to which this Warrant is permissibly assigned hereunder) from time to time. The Company may deem and treat the registered
Holder of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or any distribution to the Holder, and for all
other purposes, absent actual notice to the contrary.

3.  Registration of Transfers. Subject to compliance with all applicable securities laws, the Company shall, or will cause its Transfer
Agent to, register the transfer of all or any portion of this Warrant in the Warrant Register, upon surrender of this Warrant, and payment
for all applicable transfer taxes. Upon any such registration or transfer, a new warrant to purchase Common Stock in substantially the
form of this Warrant (any such new warrant, a “New Warrant”) evidencing the portion of this Warrant so transferred shall be issued to
the transferee, and a New Warrant evidencing the remaining portion of this Warrant not so transferred, if any, shall be issued to the
transferring Holder. The acceptance of the New Warrant by the transferee thereof shall be deemed the

1

 
 
 
 
 
 
acceptance by such transferee of all of the rights and obligations in respect of the New Warrant that the Holder has in respect of this
Warrant. The Company shall, or will cause its Transfer Agent to, prepare, issue and deliver at the Company’s own expense any New
Warrant under this Section 3. Until due presentment for registration of transfer, the Company may treat the registered Holder hereof as
the owner and holder for all purposes, and the Company shall not be affected by any notice to the contrary.

4.  Exercise and Duration of Warrants.

(a)  All or any part of this Warrant shall be exercisable by the registered Holder in any manner permitted by Section 10 of this

Warrant at any time and from time to time on or after the Original Issue Date.  The rights represented by this Warrant shall have no
termination date.

(b)  The Holder may exercise this Warrant by delivering to the Company (i) an exercise notice, in the form attached as

Schedule 1 hereto (the “Exercise Notice”), completed and duly signed, and (ii) payment of the Exercise Price for the number of
Warrant Shares as to which this Warrant is being exercised (which may take the form of a “cashless exercise” if so indicated in the
Exercise Notice and if a “cashless exercise” may occur at such time pursuant to Section 10 below), and the date on which the last of
such items is delivered to the Company (as determined in accordance with the notice provisions hereof) is an “Exercise Date.” The
Holder shall not be required to deliver the original Warrant in order to effect an exercise hereunder. Execution and delivery of the
Exercise Notice shall have the same effect as cancellation of the original Warrant and issuance of a New Warrant evidencing the right
to purchase the remaining number of Warrant Shares.

5.  Delivery of Warrant Shares.

(a)  Upon exercise of this Warrant, the Company shall promptly (but in no event later than three (3) Trading Days after the

Exercise Date), upon the request of the Holder, credit such aggregate number of shares of Common Stock to which the Holder is
entitled pursuant to such exercise to the Holder’s or its designee’s balance account with The Depository Trust Company (“DTC”)
through its Deposit Withdrawal Agent Commission system, or if the Transfer Agent is not participating in the Fast Automated
Securities Transfer Program (the “FAST Program”) or if the certificates are required to bear a legend regarding restriction on
transferability, issue and dispatch by overnight courier to the address as specified in the Exercise Notice, a certificate, registered in the
Company’s share register in the name of the Holder or its designee, for the number of shares of Common Stock to which the Holder is
entitled pursuant to such exercise. The Holder, or any Person permissibly so designated by the Holder to receive Warrant Shares, shall
be deemed to have become the holder of record of such Warrant Shares as of the Exercise Date, irrespective of the date such Warrant
Shares are credited to the Holder’s DTC account or the date of delivery of the certificates evidencing such Warrant Shares, as the case
may be.

(b)  If by the close of the third (3 ) Trading Day after the Exercise Date, the Company fails to deliver to the Holder a certificate

rd

representing the required number of Warrant Shares in the manner required pursuant to Section 5(a) or fails to credit the Holder’s
balance account with DTC for such number of Warrant Shares to which the Holder is entitled, and if after such third (3 ) Trading Day
and prior to the receipt of such Warrant Shares, the Holder purchases (in an open market transaction or otherwise) shares of Common
Stock to deliver in satisfaction of a sale by the Holder of the Warrant Shares which the Holder anticipated receiving upon such exercise
(a “Buy-In”), then the Company shall, within three (3) Trading Days after the Holder’s request and in the Holder’s sole discretion,
either (1) pay in cash to the Holder an amount equal to the Holder’s total purchase price (including brokerage commissions, if any) for
the shares of Common Stock so purchased (the “Buy-In Price”), at which point the Company’s obligation to deliver such certificate
(and to issue such Warrant Shares) shall terminate or (2) promptly honor its obligation to deliver to the Holder a certificate or
certificates representing such Warrant Shares and pay cash to the Holder in an amount equal to the excess (if any) of Holder’s total
purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased in the Buy-In over the product
of (A) the number of shares of Common Stock purchased in the Buy-In, times (B) the closing bid price of a share of Common Stock
on the Exercise Date.

rd

(c)

 To the extent permitted by law, the Company’s obligations to issue and deliver Warrant Shares in accordance with and

subject to the terms hereof (including the limitations set forth in Section 11 below) are absolute and unconditional, irrespective of any
action or inaction by the Holder to enforce the same, any waiver or consent with respect to any provision hereof, the recovery of any
judgment against any Person or any action to enforce the same, or any setoff, counterclaim, recoupment, limitation or termination, or
any breach or alleged breach by the Holder or any other Person of any obligation to the Company or any violation or alleged violation
of law by the Holder or any other Person, and irrespective of any other circumstance that might otherwise limit such obligation of the
Company to the Holder in connection with the issuance of Warrant Shares. Nothing herein shall limit the Holder’s right to pursue any
other remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or
injunctive relief with respect to the Company’s failure to timely deliver certificates representing shares of Common Stock upon
exercise of the Warrant as required pursuant to the terms hereof.

6.  Charges, Taxes and Expenses. Issuance and delivery of certificates for shares of Common Stock upon exercise of this Warrant shall
be made without charge to the Holder for any issue or transfer tax, transfer agent fee or other incidental tax or expense in respect of the
issuance of such certificates, all of which taxes and expenses shall be paid by the Company; provided, however, that the Company shall
not be required to pay any tax that may be payable in respect of any transfer involved in the registration of any

2

 
 
certificates for Warrant Shares or the Warrants in a name other than that of the Holder or an Affiliate thereof. The Holder shall be
responsible for all other tax liability that may arise as a result of holding or transferring this Warrant or receiving Warrant Shares upon
exercise hereof.

7.  Replacement of Warrant. If this Warrant is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in
exchange and substitution for and upon cancellation hereof, or in lieu of and substitution for this Warrant, a New Warrant, but only
upon receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction (in such case) and, in each case, a
customary and reasonable indemnity and surety bond, if requested by the Company. Applicants for a New Warrant under such
circumstances shall also comply with such other reasonable regulations and procedures and pay such other reasonable third-party costs
as the Company may prescribe. If a New Warrant is requested as a result of a mutilation of this Warrant, then the Holder shall deliver
such mutilated Warrant to the Company as a condition precedent to the Company’s obligation to issue the New Warrant.

8.  Reservation of Warrant Shares. The Company covenants that it will at all times while this Warrant is outstanding reserve and keep
available out of the aggregate of its authorized but unissued and otherwise unreserved Common Stock, solely for the purpose of
enabling it to issue Warrant Shares upon exercise of this Warrant as herein provided, the number of Warrant Shares that are initially
issuable and deliverable upon the exercise of this entire Warrant, free from preemptive rights or any other contingent purchase rights of
persons other than the Holder (taking into account the adjustments and restrictions of Section 9). The Company covenants that all
Warrant Shares so issuable and deliverable shall, upon issuance and the payment of the applicable Exercise Price in accordance with
the terms hereof, be duly and validly authorized, issued and fully paid and nonassessable. The Company will take all such action as
may be reasonably necessary to assure that such shares of Common Stock may be issued as provided herein without violation of any
applicable law or regulation, or of any requirements of any securities exchange or automated quotation system upon which the
Common Stock may be listed.

9.  Certain Adjustments. The Exercise Price and number of Warrant Shares issuable upon exercise of this Warrant are subject to
adjustment from time to time as set forth in this Section 9.

(a)  Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding, (i) pays a stock dividend on its

Common Stock or otherwise makes a distribution on any class of capital stock, other than Series E Preferred Stock or Series D
Preferred Stock issued and outstanding on the Original Issue Date and in accordance with the terms of such stock on the Original Issue
Date or as amended, as described in the Registration Statement, that is payable in shares of Common Stock, (ii) subdivides its
outstanding shares of Common Stock into a larger number of shares of Common Stock, (iii) combines its outstanding shares of
Common Stock into a smaller number of shares of Common Stock or (iv) issues by reclassification of shares of capital stock any
additional shares of Common Stock of the Company, then in each such case the Exercise Price shall be multiplied by a fraction, the
numerator of which shall be the number of shares of Common Stock outstanding immediately before such event and the denominator
of which shall be the number of shares of Common Stock outstanding immediately after such event. Any adjustment made pursuant to
clause (i) of this paragraph shall become effective immediately after the record date for the determination of stockholders entitled to
receive such dividend or distribution, provided, however, that if such record date shall have been fixed and such dividend is not fully
paid on the date fixed therefor, the Exercise Price shall be recomputed accordingly as of the close of business on such record date and
thereafter the Exercise Price shall be adjusted pursuant to this paragraph as of the time of actual payment of such dividends. Any
adjustment pursuant to clause (ii) or (iii) of this paragraph shall become effective immediately after the effective date of such
subdivision or combination.

(b)  Pro Rata Distributions. If the Company, at any time while this Warrant is outstanding, distributes to all holders of Common

Stock for no consideration (i) evidences of its indebtedness, (ii) any security (other than a distribution of Common Stock covered by
the preceding paragraph) or (iii) rights or warrants to subscribe for or purchase any security, or (iv) any other asset (in each case,
“Distributed Property”), then, upon any exercise of this Warrant that occurs after the record date fixed for determination of
stockholders entitled to receive such distribution, the Holder shall be entitled to receive, in addition to the Warrant Shares otherwise
issuable upon such exercise (if applicable), the Distributed Property that such Holder would have been entitled to receive in respect of
such number of Warrant Shares had the Holder been the record holder of such Warrant Shares immediately prior to such record date
without regard to any limitation on exercise contained therein.

(c)

 Fundamental Transactions. If, at any time while this Warrant is outstanding (i) the Company effects any merger or

consolidation of the Company with or into another Person, in which the Company is not the surviving entity or the stockholders of the
Company immediately prior to such merger or consolidation do not own, directly or indirectly, at least 50% of the voting power of the
surviving entity immediately after such merger or consolidation, (ii) the Company effects any sale to another Person of all or
substantially all of its assets in one or a series of related transactions, (iii) pursuant to any tender offer or exchange offer (whether by
the Company or another Person), holders of capital stock who tender shares representing more than 50% of the voting power of the
capital stock of the Company and the Company or such other Person, as applicable, accepts such tender for payment, (iv) the Company
consummates a stock purchase agreement or other business combination (including, without limitation, a reorganization,
recapitalization, spin-off or scheme of arrangement) with another Person whereby such other Person acquires more than the 50% of the
voting power of the capital stock of the Company or (v) the Company effects any reclassification of the Common Stock or any
compulsory share exchange pursuant to which the Common Stock is effectively converted into or exchanged for other securities,

3

 
 
cash or property (other than as a result of a subdivision or combination of shares of Common Stock covered by Section 9(a) above) (in
any such case, a “Fundamental Transaction”), then following such Fundamental Transaction the Holder shall have the right to receive,
upon exercise of this Warrant, the same amount and kind of securities, cash or property as it would have been entitled to receive upon
the occurrence of such Fundamental Transaction if it had been, immediately prior to such Fundamental Transaction, the holder of the
number of Warrant Shares then issuable upon exercise in full of this Warrant without regard to any limitations on exercise contained
herein (the “Alternate Consideration”). The Company shall not effect any Fundamental Transaction in which the Company is not the
surviving entity or the Alternate Consideration includes securities of another Person unless prior to or simultaneously with the
consummation thereof, any successor to the Company, surviving entity or other Person (including any purchaser of assets of the
Company) shall assume the obligation to deliver to the Holder, such Alternate Consideration as, in accordance with the foregoing
provisions, the Holder may be entitled to receive, and the other obligations under this Warrant. The provisions of this paragraph (c)
shall similarly apply to subsequent transactions analogous of a Fundamental Transaction type.

(d)  Number of Warrant Shares. Simultaneously with any adjustment to the Exercise Price pursuant to paragraphs (a) of this

Section 9, the number of Warrant Shares that may be purchased upon exercise of this Warrant shall be increased or decreased
proportionately, so that after such adjustment the aggregate Exercise Price payable hereunder for the increased or decreased number of
Warrant Shares shall be the same as the aggregate Exercise Price in effect immediately prior to such adjustment.

(e)  Calculations. All calculations under this Section 9 shall be made to the nearest cent or the nearest share, as applicable.

(f)

 Notice of Adjustments. Upon the occurrence of each adjustment pursuant to this Section 9, the Company at its expense

will, at the written request of the Holder, promptly compute such adjustment, in good faith, in accordance with the terms of this
Warrant and prepare a certificate setting forth such adjustment, including a statement of the adjusted Exercise Price and adjusted
number or type of Warrant Shares or other securities issuable upon exercise of this Warrant (as applicable), describing the transactions
giving rise to such adjustments and showing in detail the facts upon which such adjustment is based. Upon written request, the
Company will promptly deliver a copy of each such certificate to the Holder and to the Company’s transfer agent.

(g)  Notice of Corporate Events. If, while this Warrant is outstanding, the Company (i) declares a dividend or any other
distribution of cash, securities or other property in respect of its Common Stock, including, without limitation, any granting of rights or
warrants to subscribe for or purchase any capital stock of the Company or any subsidiary, (ii) authorizes or approves, enters into any
agreement contemplating or solicits stockholder approval for any Fundamental Transaction or (iii) authorizes the voluntary
dissolution, liquidation or winding up of the affairs of the Company, then, except if such notice and the contents thereof shall be
deemed to constitute material non-public information, the Company shall deliver to the Holder a notice of such transaction at least ten
(10) days prior to the applicable record or effective date on which a Person would need to hold Common Stock in order to participate
in or vote with respect to such transaction; provided, however, that the failure to deliver such notice or any defect therein shall not
affect the validity of the corporate action required to be described in such notice. In addition, if while this Warrant is outstanding, the
Company authorizes or approves, enters into any agreement contemplating or solicits stockholder approval for any Fundamental
Transaction contemplated by Section 9(c), other than a Fundamental Transaction under clause (iii) of Section 9(c), the Company shall
deliver to the Holder a notice of such Fundamental Transaction at least seventy five (75) days prior to the date such Fundamental
Transaction is consummated. To the extent that any notice provided hereunder constitutes, or contains, material, non-public
information regarding the Company or any of its subsidiaries, the Company shall simultaneously file such notice with the Commission
pursuant to a Current Report on Form 8-K.

10.  Payment of Exercise Price. Notwithstanding anything contained herein to the contrary, if a registration statement registering the
issuance of the Warrant Shares under the Securities Act is not effective or available for the issuance of the Warrant Shares and an
exemption from registration under the Securities Act is not available for the issuance of the Warrant Shares, the Holder may, in its sole
discretion, satisfy its obligation to pay the Exercise Price through a “cashless exercise”, in which event the Company shall issue to the
Holder the number of Warrant Shares determined as follows:

X = Y [(A-B)/A]

where:

“X” equals the number of Warrant Shares to be issued to the Holder;

“Y” equals the total number of Warrant Shares with respect to which this Warrant is then being exercised;

Markets) for the five (5) consecutive Trading Days ending on the date immediately preceding the Exercise Date; and

“A” equals the average of the Closing Sale Prices of the shares of Common Stock (as reported by Bloomberg Financial

“B” equals the Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise.

For purposes of Rule 144 promulgated under the Securities Act, it is intended, understood and acknowledged that the Warrant Shares
issued in a “cashless exercise” transaction shall be deemed to have been acquired by the Holder, and the holding period for the Warrant
Shares shall be deemed to have commenced, on the date this Warrant was originally issued (provided that the Commission continues to
take the position that such treatment is proper at the time of such exercise).

4

 
 
11.  Limitations on Exercise.

(a)  Notwithstanding anything to the contrary contained herein, the number of Warrant Shares that may be acquired by the

Holder upon any exercise of this Warrant (or otherwise in respect hereof) shall be limited to the extent necessary to ensure that,
following such exercise (or other issuance), the total number of shares of Common Stock then beneficially owned by the Holder and
its Affiliates and any other Persons whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes
of Section 13(d) of the Exchange Act, does not exceed 4.999% of the total number of then issued and outstanding shares of Common
Stock (including for such purpose the shares of Common Stock issuable upon such exercise), it being acknowledged by the Holder that
the Company is not representing to such Holder that such calculation is in compliance with Section 13(d) of the Exchange Act and
such Holder is solely responsible for any schedules required to be filed in accordance therewith. To the extent that the limitation
contained in this Section 11(a) applies, the determination of whether this Warrant is exercisable (in relation to other securities owned
by such Holder) and of which a portion of this Warrant is exercisable shall be in the sole discretion of a Holder, and the submission of
a Notice of Exercise shall be deemed to be the Holder’s determination of whether this Warrant is exercisable (in relation to other
securities owned by such Holder) and of which portion of this Warrant is exercisable, in each case subject to such aggregate
percentage limitation, and the Company shall have no obligation to verify or confirm the accuracy of such determination. In addition, a
determination under this Section 11(a) as to any group status shall be determined in accordance with Section 13(d) of the Exchange
Act and the rules and regulations promulgated thereunder. For purposes of this Section 11(a), in determining the number of
outstanding shares of Common Stock, the Holder may rely on the number of outstanding shares of Common Stock as reflected in (x)
the Company’s most recent Form 10-Q or Form 10-K, as the case may be, (y) a more recent public announcement by the Company or
(z) any other notice by the Company or the Transfer Agent setting forth the number of shares of Common Stock outstanding. Upon the
written request of the Holder, the Company shall within three (3) Trading Days confirm orally and in writing to such Holder the
number of shares of Common Stock then outstanding. By written notice to the Company, which will not be effective until the sixty-
first (61 ) day after such notice is delivered to the Company, the Holder may waive the provisions of this Section 11(a) (but such
waiver will not affect any other holder) to change the beneficial ownership limitation to such percentage of the number of shares of the
Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock upon exercise of this Warrant
as the Holder shall determine, in its sole discretion, subject to Section 11(b), and the provisions of this Section 11(a) shall continue to
apply. Upon such a change by a Holder of the beneficial ownership limitation from such 4.999% limitation to such other percentage
limitation, the beneficial ownership limitation may not be further waived by such Holder without first providing the minimum notice
required by this Section 11(a). Notwithstanding the foregoing, at any time following notice of a Fundamental Transaction under
Section 9(g)(ii) with respect to a Section 9(c)(iii) Fundamental Transaction, the Holder may waive and/or change the beneficial
ownership limitation effective immediately upon written notice to the Company and may reinstitute a beneficial ownership limitation
at any time thereafter effective immediately upon written notice to the Company.

st

(b)  Notwithstanding anything to the contrary contained herein, including Section 11(a), the Company shall not effect any
exercise of this Warrant, and the Holder shall not be entitled to exercise this Warrant for a number of Warrant Shares in excess of that
number of Warrant Shares which, upon giving effect to such exercise, would cause (i) the aggregate number of shares of Common
Stock beneficially owned by the Holder and its Affiliates and any other Persons whose beneficial ownership of Common Stock would
be aggregated with the Holder’s for purposes of Section 13(d) of the Exchange Act, to exceed 19.99% of the total number of issued
and outstanding shares of Common Stock of the Company following such exercise, or (ii) the combined voting power of the securities
of the Company beneficially owned by the Holder and its Affiliates and any other Persons whose beneficial ownership of Common
Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the Exchange Act to exceed 19.99% of the combined
voting power of all of the securities of the Company then outstanding following such exercise. For purposes of this Section 11(b), the
aggregate number of shares of Common Stock or voting securities beneficially owned by the Holder and its Affiliates and any other
Persons whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the
Exchange Act shall include the shares of Common Stock issuable upon the exercise of this Warrant with respect to which such
determination is being made, but shall exclude the number of shares of Common Stock which would be issuable upon (x) exercise of
the remaining unexercised and non-cancelled portion of this Warrant by the Holder and (y) exercise or conversion of the unexercised,
non-converted or non-cancelled portion of any other securities of the Company that do not have voting power (including without
limitation any securities of the Company which would entitle the holder thereof to acquire at any time Common Stock, including
without limitation any debt, preferred stock, right, option, warrant or other instrument that is at any time convertible into or exercisable
or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock), is subject to a limitation on conversion or
exercise analogous to the limitation contained herein and is beneficially owned by the Holder or any of its Affiliates and other Persons
whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the
Exchange Act.

(c)

 This Section 11 shall not restrict the number of shares of Common Stock that a Holder may receive or beneficially own in

order to determine the amount of securities or other consideration that such Holder may receive in the event of a Fundamental
Transaction as contemplated in Section 9 of this Warrant.

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12.  No Fractional Shares. No fractional Warrant Shares will be issued in connection with any exercise of this Warrant. In lieu of any
fractional shares that would otherwise be issuable, the number of Warrant Shares to be issued shall be rounded down to the next whole
number and the Company shall pay the Holder in cash the fair market value (based on the Closing Sale Price) for any such fractional
shares.

13.  Redemption of Warrants.

(a)  At any time on or after the date that is two years following the Original Issue Date, subject to the terms of this Section 13,
the Company shall have the right to redeem all or a portion of this Warrant for a redemption price (the “Redemption Price”) equal to
the result obtained by multiplying (i) $0.01 by (ii) the number of Warrant Shares that the Holder is entitled to purchase upon exercise
of all or the portion of this Warrant that is being redeemed (such Redemption Price being subject to adjustment for stock splits, stock
dividends, combinations, recapitalizations, reclassifications, and similar transactions affecting the Common Stock) following notice to
the holder thereof if the closing price of our common stock for 20 or more trading days in a period of 30 consecutive trading days is
greater than or equal to $2.80 (subject to adjustment).

(b)  The Company shall exercise this redemption right by providing at least thirty (30) days’ prior written notice to the Holder
of such redemption (the “Redemption Notice”). Such Redemption Notice shall be provided to the Holder in accordance with Section
14 of this Warrant. The Redemption Notice shall specify the time, manner and place of redemption, including without limitation the
date on which this Warrant shall be redeemed (the “Redemption Date”) and the Redemption Price payable to the Holder (assuming that
this Warrant is not exercised on or prior to the Redemption Date).

(c)

 Notwithstanding the foregoing, the Company may not redeem any part of this Warrant, which may not be exercised by the

redeeming Holder as of the date of the Redemption Notice under Section 11 of this Warrant.

14.  Notices. Any and all notices or other communications or deliveries hereunder (including, without limitation, any Exercise Notice)
shall be in writing and shall be deemed given and effective on the earliest of (i) the date of transmission, if such notice or
communication is delivered via facsimile or confirmed e-mail at the facsimile number or e-mail address specified in the books and
records of the Transfer Agent prior to 5:30 P.M., New York City time, on a Trading Day, (ii) the next Trading Day after the date of
transmission, if such notice or communication is delivered via facsimile or confirmed e-mail at the facsimile number or e-mail address
specified in the books and records of the Transfer Agent on a day that is not a Trading Day or later than 5:30 P.M., New York City
time, on any Trading Day, (iii) the Trading Day following the date of mailing, if sent by nationally recognized overnight courier
service specifying next business day delivery, or (iv) upon actual receipt by the Person to whom such notice is required to be given, if
by hand delivery.

15.  Warrant Agent. The Transfer Agent shall serve as warrant agent under this Warrant. Upon thirty (30) days’ notice to the Holder,
the Company may appoint a new warrant agent. Any corporation into which the Company or any new warrant agent may be merged or
any corporation resulting from any consolidation to which the Company or any new warrant agent shall be a party or any corporation
to which the Company or any new warrant agent transfers substantially all of its corporate trust or shareholders services business shall
be a successor warrant agent under this Warrant without any further act. Any such successor warrant agent shall promptly cause notice
of its succession as warrant agent to be mailed (by first class mail, postage prepaid) to the Holder at the Holder’s last address as shown
on the Warrant Register.

16.  Miscellaneous.

(a)  No Rights as a Stockholder. The Holder, solely in such Person’s capacity as a holder of this Warrant, shall not be entitled to

vote or receive dividends or be deemed the holder of share capital of the Company for any purpose, nor shall anything contained in
this Warrant be construed to confer upon the Holder, solely in such Person’s capacity as the Holder of this Warrant, any of the rights of
a stockholder of the Company or any right to vote, give or withhold consent to any corporate action (whether any reorganization, issue
of stock, reclassification of stock, consolidation, merger, amalgamation, conveyance or otherwise), receive notice of meetings, receive
dividends or subscription rights, or otherwise, prior to the issuance to the Holder of the Warrant Shares which such Person is then
entitled to receive upon the due exercise of this Warrant. In addition, nothing contained in this Warrant shall be construed as imposing
any liabilities on the Holder to purchase any securities (upon exercise of this Warrant or otherwise) or as a stockholder of the
Company, whether such liabilities are asserted by the Company or by creditors of the Company.

(b)  Authorized Shares. (i) Except and to the extent as waived or consented to by the Holder, the Company shall not by any
action, including, without limitation, amending its certificate or articles of incorporation or through any reorganization, transfer of
assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms of this Warrant, but will at all times in good faith assist in the carrying out of all such
terms and in the taking of all such actions as may be necessary or appropriate to protect the rights of Holder as set forth in this Warrant
against impairment. Without limiting the generality of the foregoing, the Company will (a) not increase the par value of any Warrant
Shares above the amount payable therefor upon such exercise immediately prior to such increase in par value, (b) take all such action
as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable Warrant
Shares upon the exercise of this Warrant, and (c) use commercially reasonable efforts to obtain all such authorizations, exemptions or
consents from any public regulatory body having jurisdiction thereof as may be necessary to enable

6

 
 
the Company to perform its obligations under this Warrant.

(ii)  Before  taking  any  action  which  would  result  in  an  adjustment  in  the  number  of  Warrant  Shares  for  which  this
Warrant is exercisable or in the Exercise Price, the Company shall obtain all such authorizations or exemptions thereof, or consents
thereto, as may be necessary from any public regulatory body or bodies having jurisdiction thereof.

(c)

 Successors and Assigns. Subject to the restrictions on transfer set forth in this Warrant and compliance with applicable
securities laws, this Warrant may be assigned by the Holder. This Warrant may not be assigned by the Company without the written
consent of the Holder except to a successor in the event of a Fundamental Transaction. This Warrant shall be binding on and inure to
the benefit of the Company and the Holder and their respective successors and assigns. Subject to the preceding sentence, nothing in
this Warrant shall be construed to give to any Person other than the Company and the Holder any legal or equitable right, remedy or
cause of action under this Warrant. This Warrant may be amended only in writing signed by the Company and the Holder, or their
successors and assigns.

(d)  Amendment and Waiver. Except as otherwise provided herein, the provisions of the Warrants may be amended and the
Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company
has obtained the written consent of the Holders of Warrants representing no less than a majority of the Warrant Shares obtainable upon
exercise of the Warrants then outstanding.

(e)  Acceptance. Receipt of this Warrant by the Holder shall constitute acceptance of and agreement to all of the terms and

conditions contained herein.

(f)

Governing Law; Jurisdiction. ALL QUESTIONS CONCERNING THE CONSTRUCTION, VALIDITY, ENFORCEMENT AND
INTERPRETATION OF THIS WARRANT SHALL BE GOVERNED BY AND CONSTRUED AND ENFORCED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO THE PRINCIPLES OF
CONFLICTS OF LAW THEREOF. EACH OF THE COMPANY AND THE HOLDER HEREBY IRREVOCABLY SUBMITS TO
THE EXCLUSIVE JURISDICTION OF THE STATE AND FEDERAL COURTS SITTING IN THE CITY OF NEW YORK,
BOROUGH OF MANHATTAN, FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN CONNECTION
HEREWITH OR WITH ANY TRANSACTION CONTEMPLATED HEREBY OR DISCUSSED HEREIN (INCLUDING WITH
RESPECT TO THE ENFORCEMENT OF ANY OF THE TRANSACTION DOCUMENTS), AND HEREBY IRREVOCABLY
WAIVES, AND AGREES NOT TO ASSERT IN ANY SUIT, ACTION OR PROCEEDING, ANY CLAIM THAT IT IS NOT
PERSONALLY SUBJECT TO THE JURISDICTION OF ANY SUCH COURT. EACH OF THE COMPANY AND THE HOLDER
HEREBY IRREVOCABLY WAIVES PERSONAL SERVICE OF PROCESS AND CONSENTS TO PROCESS BEING SERVED IN
ANY SUCH SUIT, ACTION OR PROCEEDING BY MAILING A COPY THEREOF VIA REGISTERED OR CERTIFIED MAIL
OR OVERNIGHT DELIVERY (WITH EVIDENCE OF DELIVERY) TO SUCH PERSON AT THE ADDRESS IN EFFECT FOR
NOTICES TO IT AND AGREES THAT SUCH SERVICE SHALL CONSTITUTE GOOD AND SUFFICIENT SERVICE OF
PROCESS AND NOTICE THEREOF. NOTHING CONTAINED HEREIN SHALL BE DEEMED TO LIMIT IN ANY WAY ANY
RIGHT TO SERVE PROCESS IN ANY MANNER PERMITTED BY LAW. EACH OF THE COMPANY AND THE HOLDER
HEREBY WAIVES ALL RIGHTS TO A TRIAL BY JURY.

(g)  Headings. The headings herein are for convenience only, do not constitute a part of this Warrant and shall not be deemed to

limit or affect any of the provisions hereof.

(h)  Severability. In case any one or more of the provisions of this Warrant shall be invalid or unenforceable in any respect, the
validity and enforceability of the remaining terms and provisions of this Warrant shall not in any way be affected or impaired thereby,
and the Company and the Holder will attempt in good faith to agree upon a valid and enforceable provision which shall be a
commercially reasonable substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Warrant.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] 

7

 
 
 
IN WITNESS WHEREOF, the Company has caused this Amended and Restated Warrant to be duly executed by its authorized officer as
of the date first indicated above.

IDERA PHARMACEUTICALS, INC.

By:

Name:

Title:

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SCHEDULE 1

FORM OF EXERCISE NOTICE

[To be executed by the Holder to purchase shares of Common Stock under the Warrant]

Ladies and Gentlemen:

(1) The undersigned is the Holder of Warrant No.

(the “ Warrant”) issued by Idera Pharmaceuticals, Inc., a Delaware

corporation (the “Company”). Capitalized terms used herein and not otherwise defined herein have the respective meanings set forth
in the Warrant.

(2) The undersigned hereby exercises its right to purchase

Warrant Shares pursuant to the Warrant.

(3) The Holder intends that payment of the Exercise Price shall be made as (check one):

¨

¨

 Cash Exercise

 “Cashless Exercise” under Section 10 of the Warrant

(4) If the Holder has elected a Cash Exercise, the Holder shall pay the sum of $

in immediately available funds to the Company

in accordance with the terms of the Warrant.

(5) Pursuant to this Exercise Notice, the Company shall deliver to the Holder Warrant Shares determined in accordance with the terms

of the Warrant.

(6) By its delivery of this Exercise Notice, the undersigned represents and warrants to the Company that in giving effect to the exercise
evidenced hereby the Holder will not beneficially own in excess of the number of shares of Common Stock (as determined in
accordance with Section 13(d) of the Securities Exchange Act of 1934) permitted to be owned under Section 11(a) or Section 11(b),
as applicable, of the Warrant to which this notice relates.

Dated:

Name of Holder:

By:

Name:

Title:

 (Signature must conform in all respects to name of Holder as specified on the face of the Warrant)

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit B

Amendment and Restatement of the Second Warrant

 
THE  WARRANTS  INITIALLY  WILL  BE  REPRESENTED  BY  ONE  OR  MORE  PERMANENT  GLOBAL  CERTIFICATES  IN
FULLY REGISTERED FORM AND WILL BE DEPOSITED WITH A CUSTODIAN FOR, AND REGISTERED IN THE NAME OF,
A NOMINEE OF THE DEPOSITORY TRUST COMPANY, NEW YORK, NEW YORK (“DTC”), AS DEPOSITARY.

IDERA PHARMACEUTICALS, INC.

FORM OF AMENDED AND RESTATED WARRANT TO PURCHASE COMMON STOCK

Warrant No. [●]

Number of Shares: [●]
(subject to adjustment)
Original Issue Date: September 30, 2013
Re-issue Date: July 27, 2018
Amendment Date: December [●], 2019

Idera Pharmaceuticals, Inc., a Delaware corporation (the “Company”), hereby certifies that, for good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, [●] or its permitted registered assigns (the “Holder”), is entitled, subject to
the terms set forth below, to purchase from the Company up to a total of [●] shares of common stock, $0.001 par value per share (the
“Common Stock”), of the Company (each such share, a “Warrant Share” and all such shares, the “Warrant Shares”) at an exercise price
per share equal to $0.08 per share (as adjusted from time to time as provided in Section 9 herein, the “Exercise Price”), upon surrender
of this Warrant to Purchase Common Stock (including any Warrants to Purchase Common Stock issued in exchange, transfer or
replacement hereof, the “Warrant”) at any time and from time to time on or after the date hereof (the “Original Issue Date”), and subject
to the following terms and conditions:

1.  Definitions. For purposes of this Warrant, the following terms shall have the following meanings:

(a)  “Commission” means the United States Securities and Exchange Commission.

(b)  “Closing Sale Price” means, for any security as of any date, the last trade price for such security on the Principal Trading

Market for such security, as reported by Bloomberg Financial Markets, or, if such Principal Trading Market begins to operate on an
extended hours basis and does not designate the last trade price, then the last trade price of such security prior to 4:00 P.M., New York
City time, as reported by Bloomberg Financial Markets, or if the foregoing do not apply, the last trade price of such security in the
over-the-counter market on the electronic bulletin board for such security as reported by Bloomberg Financial Markets, or, if no last
trade price is reported for such security by Bloomberg Financial Markets, the average of the bid and ask prices, of any market makers
for such security as reported in the “pink sheets” by Pink Sheets LLC. If the Closing Sale Price cannot be calculated for a security on a
particular date on any of the foregoing bases, the Closing Sale Price of such security on such date shall be the fair market value as
mutually determined by the Company and the Holder. If the Company and the Holder are unable to agree upon the fair market value of
such security, then the Board of Directors of the Company shall use its good faith judgment to determine the fair market value. The
Board of Directors’ determination shall be binding upon all parties absent demonstrable error. All such determinations shall be
appropriately adjusted for any stock dividend, stock split, stock combination or other similar transaction during the applicable
calculation period.

(c)

 “Principal Trading Market” means the Trading Market on which the Common Stock is primarily listed on and quoted

for trading, which, as of the Original Issue Date shall be the Nasdaq Capital Market.

(d)  “Registration Statement” means the Company’s Registration Statement on Form S-3, as amended (File No. 333- 191073),

initially filed on September 10, 2013.

(e)  “Securities Act” means the Securities Act of 1933, as amended.

(f)

“Transfer Agent” means Computershare Shareowner Services LLC, the Company’s transfer agent for the Common Stock and
Warrants.

2.  Registration of Warrants. The Company shall register this Warrant, upon records to be maintained by the Company for that purpose
(the “Warrant Register”), in the name of the record Holder (which shall include the initial Holder or, as the case may be, any registered
assignee to which this Warrant is permissibly assigned hereunder) from time to time. The Company may deem and treat the registered
Holder of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or any distribution to the Holder, and for all
other purposes, absent actual notice to the contrary.

3.  Registration of Transfers. Subject to compliance with all applicable securities laws, the Company shall, or will cause its Transfer
Agent to, register the transfer of all or any portion of this Warrant in the Warrant Register, upon surrender of this Warrant, and payment
for all applicable transfer taxes. Upon any such registration or transfer, a new warrant to purchase Common Stock in substantially the
form of this Warrant (any such new warrant, a “New Warrant”) evidencing the portion of this Warrant so transferred shall be issued to
the transferee, and a New Warrant evidencing the remaining portion of this Warrant not so transferred, if any, shall be issued to the
transferring Holder. The acceptance of the New Warrant by the transferee thereof shall be deemed the

1

 
 
 
 
 
 
acceptance by such transferee of all of the rights and obligations in respect of the New Warrant that the Holder has in respect of this
Warrant. The Company shall, or will cause its Transfer Agent to, prepare, issue and deliver at the Company’s own expense any New
Warrant under this Section 3. Until due presentment for registration of transfer, the Company may treat the registered Holder hereof as
the owner and holder for all purposes, and the Company shall not be affected by any notice to the contrary.

4.  Exercise and Duration of Warrants.

(a)  All or any part of this Warrant shall be exercisable by the registered Holder in any manner permitted by Section 10 of this

Warrant at any time and from time to time on or after the Original Issue Date.  The rights represented by this Warrant shall have no
termination date.

(b)  The Holder may exercise this Warrant by delivering to the Company (i) an exercise notice, in the form attached as

Schedule 1 hereto (the “Exercise Notice”), completed and duly signed, and (ii) payment of the Exercise Price for the number of
Warrant Shares as to which this Warrant is being exercised (which may take the form of a “cashless exercise” if so indicated in the
Exercise Notice pursuant to Section 10 below), and the date on which the last of such items is delivered to the Company (as
determined in accordance with the notice provisions hereof) is an “Exercise Date.” The Holder shall not be required to deliver the
original Warrant in order to effect an exercise hereunder. Execution and delivery of the Exercise Notice shall have the same effect as
cancellation of the original Warrant and issuance of a New Warrant evidencing the right to purchase the remaining number of Warrant
Shares.

5.  Delivery of Warrant Shares.

(a)  Upon exercise of this Warrant, the Company shall promptly (but in no event later than three (3) Trading Days after the

Exercise Date), upon the request of the Holder, credit such aggregate number of shares of Common Stock to which the Holder is
entitled pursuant to such exercise to the Holder’s or its designee’s balance account with The Depository Trust Company (“DTC”)
through its Deposit Withdrawal Agent Commission system, or if the Transfer Agent is not participating in the Fast Automated
Securities Transfer Program (the “FAST Program”) or if the certificates are required to bear a legend regarding restriction on
transferability, issue and dispatch by overnight courier to the address as specified in the Exercise Notice, a certificate, registered in the
Company’s share register in the name of the Holder or its designee, for the number of shares of Common Stock to which the Holder is
entitled pursuant to such exercise. The Holder, or any Person permissibly so designated by the Holder to receive Warrant Shares, shall
be deemed to have become the holder of record of such Warrant Shares as of the Exercise Date, irrespective of the date such Warrant
Shares are credited to the Holder’s DTC account or the date of delivery of the certificates evidencing such Warrant Shares, as the case
may be.

(b)  If by the close of the third (3 ) Trading Day after the Exercise Date, the Company fails to deliver to the Holder a certificate

rd

representing the required number of Warrant Shares in the manner required pursuant to Section 5(a) or fails to credit the Holder’s
balance account with DTC for such number of Warrant Shares to which the Holder is entitled, and if after such third (3 ) Trading Day
and prior to the receipt of such Warrant Shares, the Holder purchases (in an open market transaction or otherwise) shares of Common
Stock to deliver in satisfaction of a sale by the Holder of the Warrant Shares which the Holder anticipated receiving upon such exercise
(a “Buy-In”), then the Company shall, within three (3) Trading Days after the Holder’s request and in the Holder’s sole discretion,
either (1) pay in cash to the Holder an amount equal to the Holder’s total purchase price (including brokerage commissions, if any) for
the shares of Common Stock so purchased (the “Buy-In Price”), at which point the Company’s obligation to deliver such certificate
(and to issue such Warrant Shares) shall terminate or (2) promptly honor its obligation to deliver to the Holder a certificate or
certificates representing such Warrant Shares and pay cash to the Holder in an amount equal to the excess (if any) of Holder’s total
purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased in the Buy-In over the product
of (A) the number of shares of Common Stock purchased in the Buy-In, times (B) the closing bid price of a share of Common Stock
on the Exercise Date.

rd

(c)

 To the extent permitted by law, the Company’s obligations to issue and deliver Warrant Shares in accordance with and

subject to the terms hereof (including the limitations set forth in Section 11 below) are absolute and unconditional, irrespective of any
action or inaction by the Holder to enforce the same, any waiver or consent with respect to any provision hereof, the recovery of any
judgment against any Person or any action to enforce the same, or any setoff, counterclaim, recoupment, limitation or termination, or
any breach or alleged breach by the Holder or any other Person of any obligation to the Company or any violation or alleged violation
of law by the Holder or any other Person, and irrespective of any other circumstance that might otherwise limit such obligation of the
Company to the Holder in connection with the issuance of Warrant Shares. Nothing herein shall limit the Holder’s right to pursue any
other remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or
injunctive relief with respect to the Company’s failure to timely deliver certificates representing shares of Common Stock upon
exercise of the Warrant as required pursuant to the terms hereof.

6.  Charges, Taxes and Expenses. Issuance and delivery of certificates for shares of Common Stock upon exercise of this Warrant shall
be made without charge to the Holder for any issue or transfer tax, transfer agent fee or other incidental tax or expense in respect of the
issuance of such certificates, all of which taxes and expenses shall be paid by the Company; provided, however, that the Company shall
not be required to pay any tax that may be payable in respect of any transfer involved in the registration of any

2

 
 
certificates for Warrant Shares or the Warrants in a name other than that of the Holder or an Affiliate thereof. The Holder shall be
responsible for all other tax liability that may arise as a result of holding or transferring this Warrant or receiving Warrant Shares upon
exercise hereof.

7.  Replacement of Warrant. If this Warrant is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in
exchange and substitution for and upon cancellation hereof, or in lieu of and substitution for this Warrant, a New Warrant, but only
upon receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction (in such case) and, in each case, a
customary and reasonable indemnity and surety bond, if requested by the Company. Applicants for a New Warrant under such
circumstances shall also comply with such other reasonable regulations and procedures and pay such other reasonable third-party costs
as the Company may prescribe. If a New Warrant is requested as a result of a mutilation of this Warrant, then the Holder shall deliver
such mutilated Warrant to the Company as a condition precedent to the Company’s obligation to issue the New Warrant.

8.  Reservation of Warrant Shares. The Company covenants that it will at all times while this Warrant is outstanding reserve and keep
available out of the aggregate of its authorized but unissued and otherwise unreserved Common Stock, solely for the purpose of
enabling it to issue Warrant Shares upon exercise of this Warrant as herein provided, the number of Warrant Shares that are initially
issuable and deliverable upon the exercise of this entire Warrant, free from preemptive rights or any other contingent purchase rights of
persons other than the Holder (taking into account the adjustments and restrictions of Section 9). The Company covenants that all
Warrant Shares so issuable and deliverable shall, upon issuance and the payment of the applicable Exercise Price in accordance with
the terms hereof, be duly and validly authorized, issued and fully paid and nonassessable. The Company will take all such action as
may be reasonably necessary to assure that such shares of Common Stock may be issued as provided herein without violation of any
applicable law or regulation, or of any requirements of any securities exchange or automated quotation system upon which the
Common Stock may be listed.

9.  Certain Adjustments. The Exercise Price and number of Warrant Shares issuable upon exercise of this Warrant are subject to
adjustment from time to time as set forth in this Section 9.

(a)  Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding, (i) pays a stock dividend on its

Common Stock or otherwise makes a distribution on any class of capital stock, other than Series E Preferred Stock or Series D
Preferred Stock issued and outstanding on the Original Issue Date and in accordance with the terms of such stock on the Original Issue
Date or as amended, as described in the Registration Statement, that is payable in shares of Common Stock, (ii) subdivides its
outstanding shares of Common Stock into a larger number of shares of Common Stock, (iii) combines its outstanding shares of
Common Stock into a smaller number of shares of Common Stock or (iv) issues by reclassification of shares of capital stock any
additional shares of Common Stock of the Company, then in each such case the Exercise Price shall be multiplied by a fraction, the
numerator of which shall be the number of shares of Common Stock outstanding immediately before such event and the denominator
of which shall be the number of shares of Common Stock outstanding immediately after such event. Any adjustment made pursuant to
clause (i) of this paragraph shall become effective immediately after the record date for the determination of stockholders entitled to
receive such dividend or distribution, provided, however, that if such record date shall have been fixed and such dividend is not fully
paid on the date fixed therefor, the Exercise Price shall be recomputed accordingly as of the close of business on such record date and
thereafter the Exercise Price shall be adjusted pursuant to this paragraph as of the time of actual payment of such dividends. Any
adjustment pursuant to clause (ii) or (iii) of this paragraph shall become effective immediately after the effective date of such
subdivision or combination.

(b)  Pro Rata Distributions. If the Company, at any time while this Warrant is outstanding, distributes to all holders of Common

Stock for no consideration (i) evidences of its indebtedness, (ii) any security (other than a distribution of Common Stock covered by
the preceding paragraph) or (iii) rights or warrants to subscribe for or purchase any security, or (iv) any other asset (in each case,
“Distributed Property”), then, upon any exercise of this Warrant that occurs after the record date fixed for determination of
stockholders entitled to receive such distribution, the Holder shall be entitled to receive, in addition to the Warrant Shares otherwise
issuable upon such exercise (if applicable), the Distributed Property that such Holder would have been entitled to receive in respect of
such number of Warrant Shares had the Holder been the record holder of such Warrant Shares immediately prior to such record date
without regard to any limitation on exercise contained therein.

(c)

 Fundamental Transactions. If, at any time while this Warrant is outstanding (i) the Company effects any merger or

consolidation of the Company with or into another Person, in which the Company is not the surviving entity or the stockholders of the
Company immediately prior to such merger or consolidation do not own, directly or indirectly, at least 50% of the voting power of the
surviving entity immediately after such merger or consolidation, (ii) the Company effects any sale to another Person of all or
substantially all of its assets in one or a series of related transactions, (iii) pursuant to any tender offer or exchange offer (whether by
the Company or another Person), holders of capital stock who tender shares representing more than 50% of the voting power of the
capital stock of the Company and the Company or such other Person, as applicable, accepts such tender for payment, (iv) the Company
consummates a stock purchase agreement or other business combination (including, without limitation, a reorganization,
recapitalization, spin-off or scheme of arrangement) with another Person whereby such other Person acquires more than the 50% of the
voting power of the capital stock of the Company or (v) the Company effects any reclassification of the Common Stock or any
compulsory share exchange pursuant to which the Common Stock is effectively converted into or exchanged for other securities,

3

 
 
cash or property (other than as a result of a subdivision or combination of shares of Common Stock covered by Section 9(a) above) (in
any such case, a “Fundamental Transaction”), then following such Fundamental Transaction the Holder shall have the right to receive,
upon exercise of this Warrant, the same amount and kind of securities, cash or property as it would have been entitled to receive upon
the occurrence of such Fundamental Transaction if it had been, immediately prior to such Fundamental Transaction, the holder of the
number of Warrant Shares then issuable upon exercise in full of this Warrant without regard to any limitations on exercise contained
herein (the “Alternate Consideration”). The Company shall not effect any Fundamental Transaction in which the Company is not the
surviving entity or the Alternate Consideration includes securities of another Person unless prior to or simultaneously with the
consummation thereof, any successor to the Company, surviving entity or other Person (including any purchaser of assets of the
Company) shall assume the obligation to deliver to the Holder, such Alternate Consideration as, in accordance with the foregoing
provisions, the Holder may be entitled to receive, and the other obligations under this Warrant. The provisions of this paragraph (c)
shall similarly apply to subsequent transactions analogous of a Fundamental Transaction type.

(d)  Number of Warrant Shares. Simultaneously with any adjustment to the Exercise Price pursuant to paragraphs (a) of this

Section 9, the number of Warrant Shares that may be purchased upon exercise of this Warrant shall be increased or decreased
proportionately, so that after such adjustment the aggregate Exercise Price payable hereunder for the increased or decreased number of
Warrant Shares shall be the same as the aggregate Exercise Price in effect immediately prior to such adjustment.

(e)  Calculations. All calculations under this Section 9 shall be made to the nearest cent or the nearest share, as applicable.

(f)

 Notice of Adjustments. Upon the occurrence of each adjustment pursuant to this Section 9, the Company at its expense

will, at the written request of the Holder, promptly compute such adjustment, in good faith, in accordance with the terms of this
Warrant and prepare a certificate setting forth such adjustment, including a statement of the adjusted Exercise Price and adjusted
number or type of Warrant Shares or other securities issuable upon exercise of this Warrant (as applicable), describing the transactions
giving rise to such adjustments and showing in detail the facts upon which such adjustment is based. Upon written request, the
Company will promptly deliver a copy of each such certificate to the Holder and to the Company’s transfer agent.

(g)  Notice of Corporate Events. If, while this Warrant is outstanding, the Company (i) declares a dividend or any other
distribution of cash, securities or other property in respect of its Common Stock, including, without limitation, any granting of rights or
warrants to subscribe for or purchase any capital stock of the Company or any subsidiary, (ii) authorizes or approves, enters into any
agreement contemplating or solicits stockholder approval for any Fundamental Transaction or (iii) authorizes the voluntary
dissolution, liquidation or winding up of the affairs of the Company, then, except if such notice and the contents thereof shall be
deemed to constitute material non-public information, the Company shall deliver to the Holder a notice of such transaction at least ten
(10) days prior to the applicable record or effective date on which a Person would need to hold Common Stock in order to participate
in or vote with respect to such transaction; provided, however, that the failure to deliver such notice or any defect therein shall not
affect the validity of the corporate action required to be described in such notice. In addition, if while this Warrant is outstanding, the
Company authorizes or approves, enters into any agreement contemplating or solicits stockholder approval for any Fundamental
Transaction contemplated by Section 9(c), other than a Fundamental Transaction under clause (iii) of Section 9(c), the Company shall
deliver to the Holder a notice of such Fundamental Transaction at least seventy five (75) days prior to the date such Fundamental
Transaction is consummated. To the extent that any notice provided hereunder constitutes, or contains, material, non-public
information regarding the Company or any of its subsidiaries, the Company shall simultaneously file such notice with the Commission
pursuant to a Current Report on Form 8-K.

10.  Payment of Exercise Price. Notwithstanding anything contained herein to the contrary, the Holder may, in its sole discretion,
satisfy its obligation to pay the Exercise Price through a “cashless exercise”, in which event the Company shall issue to the Holder the
number of Warrant Shares determined as follows:

X = Y [(A-B)/A]

where:

“X” equals the number of Warrant Shares to be issued to the Holder;

“Y” equals the total number of Warrant Shares with respect to which this Warrant is then being exercised;

Markets) for the five (5) consecutive Trading Days ending on the date immediately preceding the Exercise Date; and

“A” equals the average of the Closing Sale Prices of the shares of Common Stock (as reported by Bloomberg Financial

“B” equals the Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise.

For purposes of Rule 144 promulgated under the Securities Act, it is intended, understood and acknowledged that the Warrant Shares
issued in a “cashless exercise” transaction shall be deemed to have been acquired by the Holder, and the holding period for the Warrant
Shares shall be deemed to have commenced, on the date this Warrant was originally issued (provided that the Commission continues to
take the position that such treatment is proper at the time of such exercise).

4

 
 
 
11.  Limitations on Exercise.

(a)  Notwithstanding anything to the contrary contained herein, the number of Warrant Shares that may be acquired by the

Holder upon any exercise of this Warrant (or otherwise in respect hereof) shall be limited to the extent necessary to ensure that,
following such exercise (or other issuance), the total number of shares of Common Stock then beneficially owned by the Holder and
its Affiliates and any other Persons whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes
of Section 13(d) of the Exchange Act, does not exceed 4.999% of the total number of then issued and outstanding shares of Common
Stock (including for such purpose the shares of Common Stock issuable upon such exercise), it being acknowledged by the Holder that
the Company is not representing to such Holder that such calculation is in compliance with Section 13(d) of the Exchange Act and
such Holder is solely responsible for any schedules required to be filed in accordance therewith. To the extent that the limitation
contained in this Section 11(a) applies, the determination of whether this Warrant is exercisable (in relation to other securities owned
by such Holder) and of which a portion of this Warrant is exercisable shall be in the sole discretion of a Holder, and the submission of
a Notice of Exercise shall be deemed to be the Holder’s determination of whether this Warrant is exercisable (in relation to other
securities owned by such Holder) and of which portion of this Warrant is exercisable, in each case subject to such aggregate
percentage limitation, and the Company shall have no obligation to verify or confirm the accuracy of such determination. In addition, a
determination under this Section 11(a) as to any group status shall be determined in accordance with Section 13(d) of the Exchange
Act and the rules and regulations promulgated thereunder. For purposes of this Section 11(a), in determining the number of
outstanding shares of Common Stock, the Holder may rely on the number of outstanding shares of Common Stock as reflected in (x)
the Company’s most recent Form 10-Q or Form 10-K, as the case may be, (y) a more recent public announcement by the Company or
(z) any other notice by the Company or the Transfer Agent setting forth the number of shares of Common Stock outstanding. Upon the
written request of the Holder, the Company shall within three (3) Trading Days confirm orally and in writing to such Holder the
number of shares of Common Stock then outstanding. By written notice to the Company, which will not be effective until the sixty-
first (61 ) day after such notice is delivered to the Company, the Holder may waive the provisions of this Section 11(a) (but such
waiver will not affect any other holder) to change the beneficial ownership limitation to such percentage of the number of shares of the
Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock upon exercise of this Warrant
as the Holder shall determine, in its sole discretion, subject to Section 11(b), and the provisions of this Section 11(a) shall continue to
apply. Upon such a change by a Holder of the beneficial ownership limitation from such 4.999% limitation to such other percentage
limitation, the beneficial ownership limitation may not be further waived by such Holder without first providing the minimum notice
required by this Section 11(a). Notwithstanding the foregoing, at any time following notice of a Fundamental Transaction under
Section 9(g)(ii) with respect to a Section 9(c)(iii) Fundamental Transaction, the Holder may waive and/or change the beneficial
ownership limitation effective immediately upon written notice to the Company and may reinstitute a beneficial ownership limitation
at any time thereafter effective immediately upon written notice to the Company.

st

(b)  Notwithstanding anything to the contrary contained herein, including Section 11(a), the Company shall not effect any
exercise of this Warrant, and the Holder shall not be entitled to exercise this Warrant for a number of Warrant Shares in excess of that
number of Warrant Shares which, upon giving effect to such exercise, would cause (i) the aggregate number of shares of Common
Stock beneficially owned by the Holder and its Affiliates and any other Persons whose beneficial ownership of Common Stock would
be aggregated with the Holder’s for purposes of Section 13(d) of the Exchange Act, to exceed 19.99% of the total number of issued
and outstanding shares of Common Stock of the Company following such exercise, or (ii) the combined voting power of the securities
of the Company beneficially owned by the Holder and its Affiliates and any other Persons whose beneficial ownership of Common
Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the Exchange Act to exceed 19.99% of the combined
voting power of all of the securities of the Company then outstanding following such exercise. For purposes of this Section 11(b), the
aggregate number of shares of Common Stock or voting securities beneficially owned by the Holder and its Affiliates and any other
Persons whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the
Exchange Act shall include the shares of Common Stock issuable upon the exercise of this Warrant with respect to which such
determination is being made, but shall exclude the number of shares of Common Stock which would be issuable upon (x) exercise of
the remaining unexercised and non-cancelled portion of this Warrant by the Holder and (y) exercise or conversion of the unexercised,
non-converted or non-cancelled portion of any other securities of the Company that do not have voting power (including without
limitation any securities of the Company which would entitle the holder thereof to acquire at any time Common Stock, including
without limitation any debt, preferred stock, right, option, warrant or other instrument that is at any time convertible into or exercisable
or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock), is subject to a limitation on conversion or
exercise analogous to the limitation contained herein and is beneficially owned by the Holder or any of its Affiliates and other Persons
whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the
Exchange Act.

(c)

 This Section 11 shall not restrict the number of shares of Common Stock that a Holder may receive or beneficially own in

order to determine the amount of securities or other consideration that such Holder may receive in the event of a Fundamental
Transaction as contemplated in Section 9 of this Warrant.

5

 
 
12.  No Fractional Shares. No fractional Warrant Shares will be issued in connection with any exercise of this Warrant. In lieu of any
fractional shares that would otherwise be issuable, the number of Warrant Shares to be issued shall be rounded down to the next whole
number and the Company shall pay the Holder in cash the fair market value (based on the Closing Sale Price) for any such fractional
shares.

13.  Notices. Any and all notices or other communications or deliveries hereunder (including, without limitation, any Exercise Notice)
shall be in writing and shall be deemed given and effective on the earliest of (i) the date of transmission, if such notice or
communication is delivered via facsimile or confirmed e-mail at the facsimile number or e-mail address specified in the books and
records of the Transfer Agent prior to 5:30 P.M., New York City time, on a Trading Day, (ii) the next Trading Day after the date of
transmission, if such notice or communication is delivered via facsimile or confirmed e-mail at the facsimile number or e-mail address
specified in the books and records of the Transfer Agent on a day that is not a Trading Day or later than 5:30 P.M., New York City
time, on any Trading Day, (iii) the Trading Day following the date of mailing, if sent by nationally recognized overnight courier
service specifying next business day delivery, or (iv) upon actual receipt by the Person to whom such notice is required to be given, if
by hand delivery.

14.  Warrant Agent. The Transfer Agent shall serve as warrant agent under this Warrant. Upon thirty (30) days’ notice to the Holder,
the Company may appoint a new warrant agent. Any corporation into which the Company or any new warrant agent may be merged or
any corporation resulting from any consolidation to which the Company or any new warrant agent shall be a party or any corporation
to which the Company or any new warrant agent transfers substantially all of its corporate trust or shareholders services business shall
be a successor warrant agent under this Warrant without any further act. Any such successor warrant agent shall promptly cause notice
of its succession as warrant agent to be mailed (by first class mail, postage prepaid) to the Holder at the Holder’s last address as shown
on the Warrant Register.

15.  Miscellaneous.

(a)  No Rights as a Stockholder. The Holder, solely in such Person’s capacity as a holder of this Warrant, shall not be entitled to

vote or receive dividends or be deemed the holder of share capital of the Company for any purpose, nor shall anything contained in
this Warrant be construed to confer upon the Holder, solely in such Person’s capacity as the Holder of this Warrant, any of the rights of
a stockholder of the Company or any right to vote, give or withhold consent to any corporate action (whether any reorganization, issue
of stock, reclassification of stock, consolidation, merger, amalgamation, conveyance or otherwise), receive notice of meetings, receive
dividends or subscription rights, or otherwise, prior to the issuance to the Holder of the Warrant Shares which such Person is then
entitled to receive upon the due exercise of this Warrant. In addition, nothing contained in this Warrant shall be construed as imposing
any liabilities on the Holder to purchase any securities (upon exercise of this Warrant or otherwise) or as a stockholder of the
Company, whether such liabilities are asserted by the Company or by creditors of the Company.

(b)  Authorized Shares. (i) Except and to the extent as waived or consented to by the Holder, the Company shall not by any
action, including, without limitation, amending its certificate or articles of incorporation or through any reorganization, transfer of
assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms of this Warrant, but will at all times in good faith assist in the carrying out of all such
terms and in the taking of all such actions as may be necessary or appropriate to protect the rights of Holder as set forth in this Warrant
against impairment. Without limiting the generality of the foregoing, the Company will (a) not increase the par value of any Warrant
Shares above the amount payable therefor upon such exercise immediately prior to such increase in par value, (b) take all such action
as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable Warrant
Shares upon the exercise of this Warrant, and (c) use commercially reasonable efforts to obtain all such authorizations, exemptions or
consents from any public regulatory body having jurisdiction thereof as may be necessary to enable the Company to perform its
obligations under this Warrant.

(ii)  Before  taking  any  action  which  would  result  in  an  adjustment  in  the  number  of  Warrant  Shares  for  which  this
Warrant is exercisable or in the Exercise Price, the Company shall obtain all such authorizations or exemptions thereof, or consents
thereto, as may be necessary from any public regulatory body or bodies having jurisdiction thereof.

(c)

 Successors and Assigns. Subject to the restrictions on transfer set forth in this Warrant and compliance with applicable
securities laws, this Warrant may be assigned by the Holder. This Warrant may not be assigned by the Company without the written
consent of the Holder except to a successor in the event of a Fundamental Transaction. This Warrant shall be binding on and inure to
the benefit of the Company and the Holder and their respective successors and assigns. Subject to the preceding sentence, nothing in
this Warrant shall be construed to give to any Person other than the Company and the Holder any legal or equitable right, remedy or
cause of action under this Warrant. This Warrant may be amended only in writing signed by the Company and the Holder, or their
successors and assigns.

(d)  Amendment and Waiver. Except as otherwise provided herein, the provisions of the Warrants may be amended and the
Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company
has obtained the written consent of the Holders of Warrants representing no less than a majority of the Warrant Shares obtainable upon
exercise of the Warrants then outstanding.

6

 
 
(e)  Acceptance. Receipt of this Warrant by the Holder shall constitute acceptance of and agreement to all of the terms and

conditions contained herein.

(f)

Governing Law; Jurisdiction. ALL QUESTIONS CONCERNING THE CONSTRUCTION, VALIDITY, ENFORCEMENT AND
INTERPRETATION OF THIS WARRANT SHALL BE GOVERNED BY AND CONSTRUED AND ENFORCED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO THE PRINCIPLES OF
CONFLICTS OF LAW THEREOF. EACH OF THE COMPANY AND THE HOLDER HEREBY IRREVOCABLY SUBMITS TO
THE EXCLUSIVE JURISDICTION OF THE STATE AND FEDERAL COURTS SITTING IN THE CITY OF NEW YORK,
BOROUGH OF MANHATTAN, FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN CONNECTION
HEREWITH OR WITH ANY TRANSACTION CONTEMPLATED HEREBY OR DISCUSSED HEREIN (INCLUDING WITH
RESPECT TO THE ENFORCEMENT OF ANY OF THE TRANSACTION DOCUMENTS), AND HEREBY IRREVOCABLY
WAIVES, AND AGREES NOT TO ASSERT IN ANY SUIT, ACTION OR PROCEEDING, ANY CLAIM THAT IT IS NOT
PERSONALLY SUBJECT TO THE JURISDICTION OF ANY SUCH COURT. EACH OF THE COMPANY AND THE HOLDER
HEREBY IRREVOCABLY WAIVES PERSONAL SERVICE OF PROCESS AND CONSENTS TO PROCESS BEING SERVED IN
ANY SUCH SUIT, ACTION OR PROCEEDING BY MAILING A COPY THEREOF VIA REGISTERED OR CERTIFIED MAIL
OR OVERNIGHT DELIVERY (WITH EVIDENCE OF DELIVERY) TO SUCH PERSON AT THE ADDRESS IN EFFECT FOR
NOTICES TO IT AND AGREES THAT SUCH SERVICE SHALL CONSTITUTE GOOD AND SUFFICIENT SERVICE OF
PROCESS AND NOTICE THEREOF. NOTHING CONTAINED HEREIN SHALL BE DEEMED TO LIMIT IN ANY WAY ANY
RIGHT TO SERVE PROCESS IN ANY MANNER PERMITTED BY LAW. EACH OF THE COMPANY AND THE HOLDER
HEREBY WAIVES ALL RIGHTS TO A TRIAL BY JURY.

(g)  Headings. The headings herein are for convenience only, do not constitute a part of this Warrant and shall not be deemed to

limit or affect any of the provisions hereof.

(h)  Severability. In case any one or more of the provisions of this Warrant shall be invalid or unenforceable in any respect, the
validity and enforceability of the remaining terms and provisions of this Warrant shall not in any way be affected or impaired thereby,
and the Company and the Holder will attempt in good faith to agree upon a valid and enforceable provision which shall be a
commercially reasonable substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Warrant.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] 

7

 
 
 
IN WITNESS WHEREOF, the Company has caused this Amended and Restated Warrant to be duly executed by its authorized officer as
of the date first indicated above.

IDERA PHARMACEUTICALS, INC.

By:

Name:

Title:

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SCHEDULE 1

FORM OF EXERCISE NOTICE

[To be executed by the Holder to purchase shares of Common Stock under the Warrant]

Ladies and Gentlemen:

(1) The undersigned is the Holder of Warrant No.

(the “ Warrant”) issued by Idera Pharmaceuticals, Inc., a Delaware

corporation (the “Company”). Capitalized terms used herein and not otherwise defined herein have the respective meanings set forth
in the Warrant.

(2) The undersigned hereby exercises its right to purchase

Warrant Shares pursuant to the Warrant.

(3) The Holder intends that payment of the Exercise Price shall be made as (check one):

¨

¨

 Cash Exercise

 “Cashless Exercise” under Section 10 of the Warrant

(4) If the Holder has elected a Cash Exercise, the Holder shall pay the sum of $

in immediately available funds to the Company

in accordance with the terms of the Warrant.

(5) Pursuant to this Exercise Notice, the Company shall deliver to the Holder Warrant Shares determined in accordance with the terms

of the Warrant.

(6) By its delivery of this Exercise Notice, the undersigned represents and warrants to the Company that in giving effect to the exercise
evidenced hereby the Holder will not beneficially own in excess of the number of shares of Common Stock (as determined in
accordance with Section 13(d) of the Securities Exchange Act of 1934) permitted to be owned under Section 11(a) or Section 11(b),
as applicable, of the Warrant to which this notice relates.

Dated:

Name of Holder:

By:

Name:

Title:

(Signature must conform in all respects to name of Holder as specified on the face of the Warrant)

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit C

Amendment and Restatement of the Third Warrant

 
THE  WARRANTS  INITIALLY  WILL  BE  REPRESENTED  BY  ONE  OR  MORE  PERMANENT  GLOBAL  CERTIFICATES  IN
FULLY REGISTERED FORM AND WILL BE DEPOSITED WITH A CUSTODIAN FOR, AND REGISTERED IN THE NAME OF,
A NOMINEE OF THE DEPOSITORY TRUST COMPANY, NEW YORK, NEW YORK (“DTC”), AS DEPOSITARY.

IDERA PHARMACEUTICALS, INC.

FORM OF AMENDED AND RESTATED WARRANT TO PURCHASE COMMON STOCK

Warrant No. [●]

Number of Shares: [●]
(subject to adjustment)
Original Issue Date: February 10, 2014
Re-issue Date: July 27, 2018
Amendment Date: December [●], 2019

Idera Pharmaceuticals, Inc., a Delaware corporation (the “Company”), hereby certifies that, for good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, [●] or its permitted registered assigns (the “Holder”), is entitled, subject to
the terms set forth below, to purchase from the Company up to a total of [●] shares of common stock, $0.001 par value per share (the
“Common Stock”), of the Company (each such share, a “Warrant Share” and all such shares, the “Warrant Shares”) at an exercise price
per share equal to $0.08 per share (as adjusted from time to time as provided in Section 9 herein, the “Exercise Price”), upon surrender
of this Warrant to Purchase Common Stock (including any Warrants to Purchase Common Stock issued in exchange, transfer or
replacement hereof, the “Warrant”) at any time and from time to time on or after the date hereof (the “Original Issue Date”), and subject
to the following terms and conditions:

1.  Definitions. For purposes of this Warrant, the following terms shall have the following meanings:

(a)  “Commission” means the United States Securities and Exchange Commission.

(b)  “Closing Sale Price” means, for any security as of any date, the last trade price for such security on the Principal Trading

Market for such security, as reported by Bloomberg Financial Markets, or, if such Principal Trading Market begins to operate on an
extended hours basis and does not designate the last trade price, then the last trade price of such security prior to 4:00 P.M., New York
City time, as reported by Bloomberg Financial Markets, or if the foregoing do not apply, the last trade price of such security in the
over-the-counter market on the electronic bulletin board for such security as reported by Bloomberg Financial Markets, or, if no last
trade price is reported for such security by Bloomberg Financial Markets, the average of the bid and ask prices, of any market makers
for such security as reported in the “pink sheets” by Pink Sheets LLC. If the Closing Sale Price cannot be calculated for a security on a
particular date on any of the foregoing bases, the Closing Sale Price of such security on such date shall be the fair market value as
mutually determined by the Company and the Holder. If the Company and the Holder are unable to agree upon the fair market value of
such security, then the Board of Directors of the Company shall use its good faith judgment to determine the fair market value. The
Board of Directors’ determination shall be binding upon all parties absent demonstrable error. All such determinations shall be
appropriately adjusted for any stock dividend, stock split, stock combination or other similar transaction during the applicable
calculation period.

(c)

 “Principal Trading Market” means the Trading Market on which the Common Stock is primarily listed on and quoted

for trading, which, as of the Original Issue Date shall be the Nasdaq Capital Market.

(d)  “Registration Statement” means the Company’s Registration Statement on Form S-3 (File No. 333- 191073), initially filed

on September  10, 2013.

(e)  “Securities Act” means the Securities Act of 1933, as amended.

(f)

“Transfer Agent” means Computershare Shareowner Services LLC, the Company’s transfer agent for the Common Stock and
Warrants.

2.  Registration of Warrants. The Company shall register this Warrant, upon records to be maintained by the Company for that purpose
(the “Warrant Register”), in the name of the record Holder (which shall include the initial Holder or, as the case may be, any registered
assignee to which this Warrant is permissibly assigned hereunder) from time to time. The Company may deem and treat the registered
Holder of this Warrant as the absolute owner hereof for the purpose of any exercise hereof or any distribution to the Holder, and for all
other purposes, absent actual notice to the contrary.

3.  Registration of Transfers. Subject to compliance with all applicable securities laws, the Company shall, or will cause its Transfer
Agent to, register the transfer of all or any portion of this Warrant in the Warrant Register, upon surrender of this Warrant, and payment
for all applicable transfer taxes. Upon any such registration or transfer, a new warrant to purchase Common Stock in substantially the
form of this Warrant (any such new warrant, a “New Warrant”) evidencing the portion of this Warrant so transferred shall be issued to
the transferee, and a New Warrant evidencing the remaining portion of this Warrant not so transferred, if any, shall be issued to the
transferring Holder. The acceptance of the New Warrant by the transferee thereof shall be deemed the

1

 
 
 
 
 
 
acceptance by such transferee of all of the rights and obligations in respect of the New Warrant that the Holder has in respect of this
Warrant. The Company shall, or will cause its Transfer Agent to, prepare, issue and deliver at the Company’s own expense any New
Warrant under this Section 3. Until due presentment for registration of transfer, the Company may treat the registered Holder hereof as
the owner and holder for all purposes, and the Company shall not be affected by any notice to the contrary.

4.  Exercise and Duration of Warrants.

(a)  All or any part of this Warrant shall be exercisable by the registered Holder in any manner permitted by Section 10 of this

Warrant at any time and from time to time on or after the Original Issue Date.  The rights represented by this Warrant shall have no
termination date.

(b)  The Holder may exercise this Warrant by delivering to the Company (i) an exercise notice, in the form attached as

Schedule 1 hereto (the “Exercise Notice”), completed and duly signed, and (ii) payment of the Exercise Price for the number of
Warrant Shares as to which this Warrant is being exercised (which may take the form of a “cashless exercise” if so indicated in the
Exercise Notice pursuant to Section 10 below), and the date on which the last of such items is delivered to the Company (as
determined in accordance with the notice provisions hereof) is an “Exercise Date.” The Holder shall not be required to deliver the
original Warrant in order to effect an exercise hereunder. Execution and delivery of the Exercise Notice shall have the same effect as
cancellation of the original Warrant and issuance of a New Warrant evidencing the right to purchase the remaining number of Warrant
Shares.

5.  Delivery of Warrant Shares.

(a)  Upon exercise of this Warrant, the Company shall promptly (but in no event later than three (3) Trading Days after the

Exercise Date), upon the request of the Holder, credit such aggregate number of shares of Common Stock to which the Holder is
entitled pursuant to such exercise to the Holder’s or its designee’s balance account with The Depository Trust Company (“DTC”)
through its Deposit Withdrawal Agent Commission system, or if the Transfer Agent is not participating in the Fast Automated
Securities Transfer Program (the “FAST Program”) or if the certificates are required to bear a legend regarding restriction on
transferability, issue and dispatch by overnight courier to the address as specified in the Exercise Notice, a certificate, registered in the
Company’s share register in the name of the Holder or its designee, for the number of shares of Common Stock to which the Holder is
entitled pursuant to such exercise. The Holder, or any Person permissibly so designated by the Holder to receive Warrant Shares, shall
be deemed to have become the holder of record of such Warrant Shares as of the Exercise Date, irrespective of the date such Warrant
Shares are credited to the Holder’s DTC account or the date of delivery of the certificates evidencing such Warrant Shares, as the case
may be.

(b)  If by the close of the third (3 ) Trading Day after the Exercise Date, the Company fails to deliver to the Holder a certificate

rd

representing the required number of Warrant Shares in the manner required pursuant to Section 5(a) or fails to credit the Holder’s
balance account with DTC for such number of Warrant Shares to which the Holder is entitled, and if after such third (3 ) Trading Day
and prior to the receipt of such Warrant Shares, the Holder purchases (in an open market transaction or otherwise) shares of Common
Stock to deliver in satisfaction of a sale by the Holder of the Warrant Shares which the Holder anticipated receiving upon such exercise
(a “Buy-In”), then the Company shall, within three (3) Trading Days after the Holder’s request and in the Holder’s sole discretion,
either (1) pay in cash to the Holder an amount equal to the Holder’s total purchase price (including brokerage commissions, if any) for
the shares of Common Stock so purchased (the “Buy-In Price”), at which point the Company’s obligation to deliver such certificate
(and to issue such Warrant Shares) shall terminate or (2) promptly honor its obligation to deliver to the Holder a certificate or
certificates representing such Warrant Shares and pay cash to the Holder in an amount equal to the excess (if any) of Holder’s total
purchase price (including brokerage commissions, if any) for the shares of Common Stock so purchased in the Buy-In over the product
of (A) the number of shares of Common Stock purchased in the Buy-In, times (B) the closing bid price of a share of Common Stock
on the Exercise Date.

rd

(c)

 To the extent permitted by law, the Company’s obligations to issue and deliver Warrant Shares in accordance with and

subject to the terms hereof (including the limitations set forth in Section 11 below) are absolute and unconditional, irrespective of any
action or inaction by the Holder to enforce the same, any waiver or consent with respect to any provision hereof, the recovery of any
judgment against any Person or any action to enforce the same, or any setoff, counterclaim, recoupment, limitation or termination, or
any breach or alleged breach by the Holder or any other Person of any obligation to the Company or any violation or alleged violation
of law by the Holder or any other Person, and irrespective of any other circumstance that might otherwise limit such obligation of the
Company to the Holder in connection with the issuance of Warrant Shares. Nothing herein shall limit the Holder’s right to pursue any
other remedies available to it hereunder, at law or in equity including, without limitation, a decree of specific performance and/or
injunctive relief with respect to the Company’s failure to timely deliver certificates representing shares of Common Stock upon
exercise of the Warrant as required pursuant to the terms hereof.

6.  Charges, Taxes and Expenses. Issuance and delivery of certificates for shares of Common Stock upon exercise of this Warrant shall
be made without charge to the Holder for any issue or transfer tax, transfer agent fee or other incidental tax or expense in respect of the
issuance of such certificates, all of which taxes and expenses shall be paid by the Company; provided, however, that the Company shall
not be required to pay any tax that may be payable in respect of any transfer involved in the registration of any

2

 
 
certificates for Warrant Shares or the Warrants in a name other than that of the Holder or an Affiliate thereof. The Holder shall be
responsible for all other tax liability that may arise as a result of holding or transferring this Warrant or receiving Warrant Shares upon
exercise hereof.

7.  Replacement of Warrant. If this Warrant is mutilated, lost, stolen or destroyed, the Company shall issue or cause to be issued in
exchange and substitution for and upon cancellation hereof, or in lieu of and substitution for this Warrant, a New Warrant, but only
upon receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction (in such case) and, in each case, a
customary and reasonable indemnity and surety bond, if requested by the Company. Applicants for a New Warrant under such
circumstances shall also comply with such other reasonable regulations and procedures and pay such other reasonable third-party costs
as the Company may prescribe. If a New Warrant is requested as a result of a mutilation of this Warrant, then the Holder shall deliver
such mutilated Warrant to the Company as a condition precedent to the Company’s obligation to issue the New Warrant.

8.  Reservation of Warrant Shares. The Company covenants that it will at all times while this Warrant is outstanding reserve and keep
available out of the aggregate of its authorized but unissued and otherwise unreserved Common Stock, solely for the purpose of
enabling it to issue Warrant Shares upon exercise of this Warrant as herein provided, the number of Warrant Shares that are initially
issuable and deliverable upon the exercise of this entire Warrant, free from preemptive rights or any other contingent purchase rights of
persons other than the Holder (taking into account the adjustments and restrictions of Section 9). The Company covenants that all
Warrant Shares so issuable and deliverable shall, upon issuance and the payment of the applicable Exercise Price in accordance with
the terms hereof, be duly and validly authorized, issued and fully paid and nonassessable. The Company will take all such action as
may be reasonably necessary to assure that such shares of Common Stock may be issued as provided herein without violation of any
applicable law or regulation, or of any requirements of any securities exchange or automated quotation system upon which the
Common Stock may be listed.

9.  Certain Adjustments. The Exercise Price and number of Warrant Shares issuable upon exercise of this Warrant are subject to
adjustment from time to time as set forth in this Section 9.

(a)  Stock Dividends and Splits. If the Company, at any time while this Warrant is outstanding, (i) pays a stock dividend on its

Common Stock or otherwise makes a distribution on any class of capital stock, other than Series E Preferred Stock or Series D
Preferred Stock issued and outstanding on the Original Issue Date and in accordance with the terms of such stock on the Original Issue
Date or as amended, as described in the Registration Statement, that is payable in shares of Common Stock, (ii) subdivides its
outstanding shares of Common Stock into a larger number of shares of Common Stock, (iii) combines its outstanding shares of
Common Stock into a smaller number of shares of Common Stock or (iv) issues by reclassification of shares of capital stock any
additional shares of Common Stock of the Company, then in each such case the Exercise Price shall be multiplied by a fraction, the
numerator of which shall be the number of shares of Common Stock outstanding immediately before such event and the denominator
of which shall be the number of shares of Common Stock outstanding immediately after such event. Any adjustment made pursuant to
clause (i) of this paragraph shall become effective immediately after the record date for the determination of stockholders entitled to
receive such dividend or distribution, provided, however, that if such record date shall have been fixed and such dividend is not fully
paid on the date fixed therefor, the Exercise Price shall be recomputed accordingly as of the close of business on such record date and
thereafter the Exercise Price shall be adjusted pursuant to this paragraph as of the time of actual payment of such dividends. Any
adjustment pursuant to clause (ii) or (iii) of this paragraph shall become effective immediately after the effective date of such
subdivision or combination.

(b)  Pro Rata Distributions. If the Company, at any time while this Warrant is outstanding, distributes to all holders of Common

Stock for no consideration (i) evidences of its indebtedness, (ii) any security (other than a distribution of Common Stock covered by
the preceding paragraph) or (iii) rights or warrants to subscribe for or purchase any security, or (iv) any other asset (in each case,
“Distributed Property”), then, upon any exercise of this Warrant that occurs after the record date fixed for determination of
stockholders entitled to receive such distribution, the Holder shall be entitled to receive, in addition to the Warrant Shares otherwise
issuable upon such exercise (if applicable), the Distributed Property that such Holder would have been entitled to receive in respect of
such number of Warrant Shares had the Holder been the record holder of such Warrant Shares immediately prior to such record date
without regard to any limitation on exercise contained therein.

(c)

 Fundamental Transactions. If, at any time while this Warrant is outstanding (i) the Company effects any merger or

consolidation of the Company with or into another Person, in which the Company is not the surviving entity or the stockholders of the
Company immediately prior to such merger or consolidation do not own, directly or indirectly, at least 50% of the voting power of the
surviving entity immediately after such merger or consolidation, (ii) the Company effects any sale to another Person of all or
substantially all of its assets in one or a series of related transactions, (iii) pursuant to any tender offer or exchange offer (whether by
the Company or another Person), holders of capital stock who tender shares representing more than 50% of the voting power of the
capital stock of the Company and the Company or such other Person, as applicable, accepts such tender for payment, (iv) the Company
consummates a stock purchase agreement or other business combination (including, without limitation, a reorganization,
recapitalization, spin-off or scheme of arrangement) with another Person whereby such other Person acquires more than the 50% of the
voting power of the capital stock of the Company or (v) the Company effects any reclassification of the Common Stock or any
compulsory share exchange pursuant to which the Common Stock is effectively converted into or exchanged for other securities,

3

 
 
cash or property (other than as a result of a subdivision or combination of shares of Common Stock covered by Section 9(a) above) (in
any such case, a “Fundamental Transaction”), then following such Fundamental Transaction the Holder shall have the right to receive,
upon exercise of this Warrant, the same amount and kind of securities, cash or property as it would have been entitled to receive upon
the occurrence of such Fundamental Transaction if it had been, immediately prior to such Fundamental Transaction, the holder of the
number of Warrant Shares then issuable upon exercise in full of this Warrant without regard to any limitations on exercise contained
herein (the “Alternate Consideration”). The Company shall not effect any Fundamental Transaction in which the Company is not the
surviving entity or the Alternate Consideration includes securities of another Person unless prior to or simultaneously with the
consummation thereof, any successor to the Company, surviving entity or other Person (including any purchaser of assets of the
Company) shall assume the obligation to deliver to the Holder, such Alternate Consideration as, in accordance with the foregoing
provisions, the Holder may be entitled to receive, and the other obligations under this Warrant. The provisions of this paragraph (c)
shall similarly apply to subsequent transactions analogous of a Fundamental Transaction type.

(d)  Number of Warrant Shares. Simultaneously with any adjustment to the Exercise Price pursuant to paragraphs (a) of this

Section 9, the number of Warrant Shares that may be purchased upon exercise of this Warrant shall be increased or decreased
proportionately, so that after such adjustment the aggregate Exercise Price payable hereunder for the increased or decreased number of
Warrant Shares shall be the same as the aggregate Exercise Price in effect immediately prior to such adjustment.

(e)  Calculations. All calculations under this Section 9 shall be made to the nearest cent or the nearest share, as applicable.

(f)

 Notice of Adjustments. Upon the occurrence of each adjustment pursuant to this Section 9, the Company at its expense

will, at the written request of the Holder, promptly compute such adjustment, in good faith, in accordance with the terms of this
Warrant and prepare a certificate setting forth such adjustment, including a statement of the adjusted Exercise Price and adjusted
number or type of Warrant Shares or other securities issuable upon exercise of this Warrant (as applicable), describing the transactions
giving rise to such adjustments and showing in detail the facts upon which such adjustment is based. Upon written request, the
Company will promptly deliver a copy of each such certificate to the Holder and to the Company’s transfer agent.

(g)  Notice of Corporate Events. If, while this Warrant is outstanding, the Company (i) declares a dividend or any other
distribution of cash, securities or other property in respect of its Common Stock, including, without limitation, any granting of rights or
warrants to subscribe for or purchase any capital stock of the Company or any subsidiary, (ii) authorizes or approves, enters into any
agreement contemplating or solicits stockholder approval for any Fundamental Transaction or (iii) authorizes the voluntary
dissolution, liquidation or winding up of the affairs of the Company, then, except if such notice and the contents thereof shall be
deemed to constitute material non-public information, the Company shall deliver to the Holder a notice of such transaction at least ten
(10) days prior to the applicable record or effective date on which a Person would need to hold Common Stock in order to participate
in or vote with respect to such transaction; provided, however, that the failure to deliver such notice or any defect therein shall not
affect the validity of the corporate action required to be described in such notice. In addition, if while this Warrant is outstanding, the
Company authorizes or approves, enters into any agreement contemplating or solicits stockholder approval for any Fundamental
Transaction contemplated by Section 9(c), other than a Fundamental Transaction under clause (iii) of Section 9(c), the Company shall
deliver to the Holder a notice of such Fundamental Transaction at least seventy five (75) days prior to the date such Fundamental
Transaction is consummated. To the extent that any notice provided hereunder constitutes, or contains, material, non-public
information regarding the Company or any of its subsidiaries, the Company shall simultaneously file such notice with the Commission
pursuant to a Current Report on Form 8-K.

10.  Payment of Exercise Price. Notwithstanding anything contained herein to the contrary, the Holder may, in its sole discretion,
satisfy its obligation to pay the Exercise Price through a “cashless exercise”, in which event the Company shall issue to the Holder the
number of Warrant Shares determined as follows:

X = Y [(A-B)/A]

where:

“X” equals the number of Warrant Shares to be issued to the Holder;

“Y” equals the total number of Warrant Shares with respect to which this Warrant is then being exercised;

Markets) for the five (5) consecutive Trading Days ending on the date immediately preceding the Exercise Date; and

“A” equals the average of the Closing Sale Prices of the shares of Common Stock (as reported by Bloomberg Financial

“B” equals the Exercise Price then in effect for the applicable Warrant Shares at the time of such exercise.

For purposes of Rule 144 promulgated under the Securities Act, it is intended, understood and acknowledged that the Warrant Shares
issued in a “cashless exercise” transaction shall be deemed to have been acquired by the Holder, and the holding period for the Warrant
Shares shall be deemed to have commenced, on the date this Warrant was originally issued (provided that the Commission continues to
take the position that such treatment is proper at the time of such exercise).

4

 
 
 
11.  Limitations on Exercise.

(a)  Notwithstanding anything to the contrary contained herein, the number of Warrant Shares that may be acquired by the

Holder upon any exercise of this Warrant (or otherwise in respect hereof) shall be limited to the extent necessary to ensure that,
following such exercise (or other issuance), the total number of shares of Common Stock then beneficially owned by the Holder and
its Affiliates and any other Persons whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes
of Section 13(d) of the Exchange Act, does not exceed 4.999% of the total number of then issued and outstanding shares of Common
Stock (including for such purpose the shares of Common Stock issuable upon such exercise), it being acknowledged by the Holder that
the Company is not representing to such Holder that such calculation is in compliance with Section 13(d) of the Exchange Act and
such Holder is solely responsible for any schedules required to be filed in accordance therewith. To the extent that the limitation
contained in this Section 11(a) applies, the determination of whether this Warrant is exercisable (in relation to other securities owned
by such Holder) and of which a portion of this Warrant is exercisable shall be in the sole discretion of a Holder, and the submission of
a Notice of Exercise shall be deemed to be the Holder’s determination of whether this Warrant is exercisable (in relation to other
securities owned by such Holder) and of which portion of this Warrant is exercisable, in each case subject to such aggregate
percentage limitation, and the Company shall have no obligation to verify or confirm the accuracy of such determination. In addition, a
determination under this Section 11(a) as to any group status shall be determined in accordance with Section 13(d) of the Exchange
Act and the rules and regulations promulgated thereunder. For purposes of this Section 11(a), in determining the number of
outstanding shares of Common Stock, the Holder may rely on the number of outstanding shares of Common Stock as reflected in (x)
the Company’s most recent Form 10-Q or Form 10-K, as the case may be, (y) a more recent public announcement by the Company or
(z) any other notice by the Company or the Transfer Agent setting forth the number of shares of Common Stock outstanding. Upon the
written request of the Holder, the Company shall within three (3) Trading Days confirm orally and in writing to such Holder the
number of shares of Common Stock then outstanding. By written notice to the Company, which will not be effective until the sixty-
first (61 ) day after such notice is delivered to the Company, the Holder may waive the provisions of this Section 11(a) (but such
waiver will not affect any other holder) to change the beneficial ownership limitation to such percentage of the number of shares of the
Common Stock outstanding immediately after giving effect to the issuance of shares of Common Stock upon exercise of this Warrant
as the Holder shall determine, in its sole discretion, subject to Section 11(b), and the provisions of this Section 11(a) shall continue to
apply. Upon such a change by a Holder of the beneficial ownership limitation from such 4.999% limitation to such other percentage
limitation, the beneficial ownership limitation may not be further waived by such Holder without first providing the minimum notice
required by this Section 11(a). Notwithstanding the foregoing, at any time following notice of a Fundamental Transaction under
Section 9(g)(ii) with respect to a Section 9(c)(iii) Fundamental Transaction, the Holder may waive and/or change the beneficial
ownership limitation effective immediately upon written notice to the Company and may reinstitute a beneficial ownership limitation
at any time thereafter effective immediately upon written notice to the Company.

st

(b)  Notwithstanding anything to the contrary contained herein, including Section 11(a), the Company shall not effect any
exercise of this Warrant, and the Holder shall not be entitled to exercise this Warrant for a number of Warrant Shares in excess of that
number of Warrant Shares which, upon giving effect to such exercise, would cause (i) the aggregate number of shares of Common
Stock beneficially owned by the Holder and its Affiliates and any other Persons whose beneficial ownership of Common Stock would
be aggregated with the Holder’s for purposes of Section 13(d) of the Exchange Act, to exceed 19.99% of the total number of issued
and outstanding shares of Common Stock of the Company following such exercise, or (ii) the combined voting power of the securities
of the Company beneficially owned by the Holder and its Affiliates and any other Persons whose beneficial ownership of Common
Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the Exchange Act to exceed 19.99% of the combined
voting power of all of the securities of the Company then outstanding following such exercise. For purposes of this Section 11(b), the
aggregate number of shares of Common Stock or voting securities beneficially owned by the Holder and its Affiliates and any other
Persons whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the
Exchange Act shall include the shares of Common Stock issuable upon the exercise of this Warrant with respect to which such
determination is being made, but shall exclude the number of shares of Common Stock which would be issuable upon (x) exercise of
the remaining unexercised and non-cancelled portion of this Warrant by the Holder and (y) exercise or conversion of the unexercised,
non-converted or non-cancelled portion of any other securities of the Company that do not have voting power (including without
limitation any securities of the Company which would entitle the holder thereof to acquire at any time Common Stock, including
without limitation any debt, preferred stock, right, option, warrant or other instrument that is at any time convertible into or exercisable
or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock), is subject to a limitation on conversion or
exercise analogous to the limitation contained herein and is beneficially owned by the Holder or any of its Affiliates and other Persons
whose beneficial ownership of Common Stock would be aggregated with the Holder’s for purposes of Section 13(d) of the
Exchange Act.

(c)

 This Section 11 shall not restrict the number of shares of Common Stock that a Holder may receive or beneficially own in

order to determine the amount of securities or other consideration that such Holder may receive in the event of a Fundamental
Transaction as contemplated in Section 9 of this Warrant.

5

 
 
12.  No Fractional Shares. No fractional Warrant Shares will be issued in connection with any exercise of this Warrant. In lieu of any
fractional shares that would otherwise be issuable, the number of Warrant Shares to be issued shall be rounded down to the next whole
number and the Company shall pay the Holder in cash the fair market value (based on the Closing Sale Price) for any such fractional
shares.

13.  Notices. Any and all notices or other communications or deliveries hereunder (including, without limitation, any Exercise Notice)
shall be in writing and shall be deemed given and effective on the earliest of (i) the date of transmission, if such notice or
communication is delivered via facsimile or confirmed e-mail at the facsimile number or e-mail address specified in the books and
records of the Transfer Agent prior to 5:30 P.M., New York City time, on a Trading Day, (ii) the next Trading Day after the date of
transmission, if such notice or communication is delivered via facsimile or confirmed e-mail at the facsimile number or e-mail address
specified in the books and records of the Transfer Agent on a day that is not a Trading Day or later than 5:30 P.M., New York City
time, on any Trading Day, (iii) the Trading Day following the date of mailing, if sent by nationally recognized overnight courier
service specifying next business day delivery, or (iv) upon actual receipt by the Person to whom such notice is required to be given, if
by hand delivery.

14.  Warrant Agent. The Transfer Agent shall serve as warrant agent under this Warrant. Upon thirty (30) days’ notice to the Holder,
the Company may appoint a new warrant agent. Any corporation into which the Company or any new warrant agent may be merged or
any corporation resulting from any consolidation to which the Company or any new warrant agent shall be a party or any corporation
to which the Company or any new warrant agent transfers substantially all of its corporate trust or shareholders services business shall
be a successor warrant agent under this Warrant without any further act. Any such successor warrant agent shall promptly cause notice
of its succession as warrant agent to be mailed (by first class mail, postage prepaid) to the Holder at the Holder’s last address as shown
on the Warrant Register.

15.  Miscellaneous.

(a)  No Rights as a Stockholder. The Holder, solely in such Person’s capacity as a holder of this Warrant, shall not be entitled to

vote or receive dividends or be deemed the holder of share capital of the Company for any purpose, nor shall anything contained in
this Warrant be construed to confer upon the Holder, solely in such Person’s capacity as the Holder of this Warrant, any of the rights of
a stockholder of the Company or any right to vote, give or withhold consent to any corporate action (whether any reorganization, issue
of stock, reclassification of stock, consolidation, merger, amalgamation, conveyance or otherwise), receive notice of meetings, receive
dividends or subscription rights, or otherwise, prior to the issuance to the Holder of the Warrant Shares which such Person is then
entitled to receive upon the due exercise of this Warrant. In addition, nothing contained in this Warrant shall be construed as imposing
any liabilities on the Holder to purchase any securities (upon exercise of this Warrant or otherwise) or as a stockholder of the
Company, whether such liabilities are asserted by the Company or by creditors of the Company.

(b)  Authorized Shares. (i) Except and to the extent as waived or consented to by the Holder, the Company shall not by any
action, including, without limitation, amending its certificate or articles of incorporation or through any reorganization, transfer of
assets, consolidation, merger, dissolution, issue or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms of this Warrant, but will at all times in good faith assist in the carrying out of all such
terms and in the taking of all such actions as may be necessary or appropriate to protect the rights of Holder as set forth in this Warrant
against impairment. Without limiting the generality of the foregoing, the Company will (a) not increase the par value of any Warrant
Shares above the amount payable therefor upon such exercise immediately prior to such increase in par value, (b) take all such action
as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and nonassessable Warrant
Shares upon the exercise of this Warrant, and (c) use commercially reasonable efforts to obtain all such authorizations, exemptions or
consents from any public regulatory body having jurisdiction thereof as may be necessary to enable the Company to perform its
obligations under this Warrant.

(ii)  Before  taking  any  action  which  would  result  in  an  adjustment  in  the  number  of  Warrant  Shares  for  which  this
Warrant is exercisable or in the Exercise Price, the Company shall obtain all such authorizations or exemptions thereof, or consents
thereto, as may be necessary from any public regulatory body or bodies having jurisdiction thereof.

(c)

 Successors and Assigns. Subject to the restrictions on transfer set forth in this Warrant and compliance with applicable
securities laws, this Warrant may be assigned by the Holder. This Warrant may not be assigned by the Company without the written
consent of the Holder except to a successor in the event of a Fundamental Transaction. This Warrant shall be binding on and inure to
the benefit of the Company and the Holder and their respective successors and assigns. Subject to the preceding sentence, nothing in
this Warrant shall be construed to give to any Person other than the Company and the Holder any legal or equitable right, remedy or
cause of action under this Warrant. This Warrant may be amended only in writing signed by the Company and the Holder, or their
successors and assigns.

(d)  Amendment and Waiver. Except as otherwise provided herein, the provisions of the Warrants may be amended and the
Company may take any action herein prohibited, or omit to perform any act herein required to be performed by it, only if the Company
has obtained the written consent of the Holders of Warrants representing no less than a majority of the Warrant Shares obtainable upon
exercise of the Warrants then outstanding.

6

 
 
(e)  Acceptance. Receipt of this Warrant by the Holder shall constitute acceptance of and agreement to all of the terms and

conditions contained herein.

(f)

Governing Law; Jurisdiction. ALL QUESTIONS CONCERNING THE CONSTRUCTION, VALIDITY, ENFORCEMENT AND
INTERPRETATION OF THIS WARRANT SHALL BE GOVERNED BY AND CONSTRUED AND ENFORCED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO THE PRINCIPLES OF
CONFLICTS OF LAW THEREOF. EACH OF THE COMPANY AND THE HOLDER HEREBY IRREVOCABLY SUBMITS TO
THE EXCLUSIVE JURISDICTION OF THE STATE AND FEDERAL COURTS SITTING IN THE CITY OF NEW YORK,
BOROUGH OF MANHATTAN, FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN CONNECTION
HEREWITH OR WITH ANY TRANSACTION CONTEMPLATED HEREBY OR DISCUSSED HEREIN (INCLUDING WITH
RESPECT TO THE ENFORCEMENT OF ANY OF THE TRANSACTION DOCUMENTS), AND HEREBY IRREVOCABLY
WAIVES, AND AGREES NOT TO ASSERT IN ANY SUIT, ACTION OR PROCEEDING, ANY CLAIM THAT IT IS NOT
PERSONALLY SUBJECT TO THE JURISDICTION OF ANY SUCH COURT. EACH OF THE COMPANY AND THE HOLDER
HEREBY IRREVOCABLY WAIVES PERSONAL SERVICE OF PROCESS AND CONSENTS TO PROCESS BEING SERVED IN
ANY SUCH SUIT, ACTION OR PROCEEDING BY MAILING A COPY THEREOF VIA REGISTERED OR CERTIFIED MAIL
OR OVERNIGHT DELIVERY (WITH EVIDENCE OF DELIVERY) TO SUCH PERSON AT THE ADDRESS IN EFFECT FOR
NOTICES TO IT AND AGREES THAT SUCH SERVICE SHALL CONSTITUTE GOOD AND SUFFICIENT SERVICE OF
PROCESS AND NOTICE THEREOF. NOTHING CONTAINED HEREIN SHALL BE DEEMED TO LIMIT IN ANY WAY ANY
RIGHT TO SERVE PROCESS IN ANY MANNER PERMITTED BY LAW. EACH OF THE COMPANY AND THE HOLDER
HEREBY WAIVES ALL RIGHTS TO A TRIAL BY JURY.

(g)  Headings. The headings herein are for convenience only, do not constitute a part of this Warrant and shall not be deemed to

limit or affect any of the provisions hereof.

(h)  Severability. In case any one or more of the provisions of this Warrant shall be invalid or unenforceable in any respect, the
validity and enforceability of the remaining terms and provisions of this Warrant shall not in any way be affected or impaired thereby,
and the Company and the Holder will attempt in good faith to agree upon a valid and enforceable provision which shall be a
commercially reasonable substitute therefor, and upon so agreeing, shall incorporate such substitute provision in this Warrant.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK] 

7

 
 
 
IN WITNESS WHEREOF, the Company has caused this Amended and Restated Warrant to be duly executed by its authorized
officer as of the date first indicated above.

IDERA PHARMACEUTICALS, INC.

By:

Name:

Title:

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SCHEDULE 1

FORM OF EXERCISE NOTICE

[To be executed by the Holder to purchase shares of Common Stock under the Warrant]

Ladies and Gentlemen:

(1) The undersigned is the Holder of Warrant No.

(the “ Warrant”) issued by Idera Pharmaceuticals, Inc., a Delaware

corporation (the “Company”). Capitalized terms used herein and not otherwise defined herein have the respective meanings set forth
in the Warrant.

(2) The undersigned hereby exercises its right to purchase

Warrant Shares pursuant to the Warrant.

(3) The Holder intends that payment of the Exercise Price shall be made as (check one):

¨

¨

 Cash Exercise

 “Cashless Exercise” under Section 10 of the Warrant

(4) If the Holder has elected a Cash Exercise, the Holder shall pay the sum of $

in immediately available funds to the Company

in accordance with the terms of the Warrant.

(5) Pursuant to this Exercise Notice, the Company shall deliver to the Holder Warrant Shares determined in accordance with the terms

of the Warrant.

(6) By its delivery of this Exercise Notice, the undersigned represents and warrants to the Company that in giving effect to the exercise
evidenced hereby the Holder will not beneficially own in excess of the number of shares of Common Stock (as determined in
accordance with Section 13(d) of the Securities Exchange Act of 1934, as amended) permitted to be owned under Section 11(a) or
Section 11(b), as applicable, of the Warrant to which this notice relates.

Dated:

Name of Holder:

By:

Name:

Title:

(Signature must conform in all respects to name of Holder as specified on the face of the Warrant)

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
DESCRIPTION OF THE REGISTRANT’S SECURITIES
REGISTERED PURSUANT TO SECTION 12 OF THE
SECURITIES EXCHANGE ACT OF 1934

Exhibit 4.14

The following description sets forth certain material terms and provisions of Idera Pharmaceuticals,
Inc.’s  (“Idera,”  “we,”  “us,”  and  “our”)  securities  that  are  registered  under  Section  12  of  the  Securities
Exchange Act of 1934, as amended.

The following description is a summary and does not purport to be complete. It is subject to, and
qualified  in  its  entirety  by  reference  to,  Idera’s  Restated  Certificate  of  Incorporation,  as  amended  (the
“Certificate  of  Incorporation”)  and  Idera’s  Amended  and  Restated  Bylaws  (the  “Bylaws”),  each  of  which
are incorporated by reference as an exhibit to the Annual Report on Form 10-K of which this Exhibit 4.14 is
a part.  The terms of these securities also may be affected by the Delaware General Corporation Law.

Unless otherwise indicated, any share and per share amounts included in the description of our

securities, reflect, as applicable, the occurrence of a 1-for-8 reverse split of our common stock that occurred
on June 29, 2006 and a 1-for-8 reverse split of our common stock that occurred on July 27, 2018.

Description of Common Stock

Voting

Each  outstanding  share  of  common  stock,  par  value  $0.001  per  share,  is  entitled  to  one  vote  per
share  on  all  matters  submitted  to  a  vote  of  our  stockholders,  except  as  set  forth  in  the  Certificate  of
Incorporation. Holders of common stock do not have cumulative voting rights.

Dividends; Liquidation and Dissolution

Subject to the preferences that may be applicable to any then outstanding shares of preferred stock,
holders  of  common  stock  are  entitled  to  receive  ratably  on  a  per  share  basis  such  dividends  and  other
distributions in cash, stock or property of Idera as may be declared by our Board of Directors (the “Board”)
from time to time out of the legally available assets or funds of Idera. Upon our voluntary or involuntary
liquidation, dissolution or winding up, holders of common stock are entitled to receive ratably all assets of
Idera  available  for  distribution  to  its  stockholders  after  payment  of  any  amounts  due  to  creditors  and  any
amounts due to the holders of our preferred stock.

Other Rights and Restrictions

Holders  of  our  common  stock  have  no  preemptive  rights  and  no  right  to  convert  their  common
stock  into  any  other  securities.  There  are  no  redemption  or  sinking  fund  provisions  applicable  to  our
common stock. The Certificate of Incorporation and Bylaws do not restrict the ability of holders of common
stock  to  transfer  their  shares  of  common  stock.  Our  Board  may  authorize  the  issuance  of  preferred  stock
with  voting,  conversion,  dividend,  liquidation  and  other  rights  that  may  adversely  affect  the  rights  of  the
holder of our common stock.

Put Right

Pursuant to the terms of that certain Unit Purchase Agreement, dated May 5, 1998 (the “UPA”) we
issued  and  sold  a  total  of  149,960  shares  of  common  stock  (the  “Put  Shares”)  at  a  price  of  $128.00  per
share. Under the UPA, the initial purchasers of the Put Shares (the “Put Holders”) have the right to require
us to repurchase the put shares (the “Put Right”). In order for the Put Right to be exercised by any Put

 
Holder  all  of  the  following  must  occur:  (1)  we  liquidate,  dissolve  or  wind  up  our  affairs  pursuant  to
applicable bankruptcy law, whether voluntarily or involuntarily; (2) all of our indebtedness and obligations,
including without limitation the indebtedness under our outstanding notes, has been paid in full; and (3) all
rights of the holders of any series or class of capital stick raking prior and senior to the common stock with
respect to liquidation have been satisfied in full. We may terminate the Put Right upon written notice to the
Put Holders if the closing sales price of our common stock exceeds $256.00 per share for the 20 consecutive
trading days prior to the date of notice of termination. Because the Put Right is not transferable, in the event
that  a  Put  Holder  has  transferred  Put  Shares  since  May  5,  1998,  the  Put  Right  with  respect  to  those  Put
Shares has terminated. As a consequence of the Put Right, in the event we are liquidated, holders of shares
of common stock that do not have a Put Right with respect to such shares may receive smaller distributions
per  share  upon  our  liquidation  than  if  there  was  no  Put  Right  outstanding.  As  of  the  date  of  the  Annual
Report on Form 10-K of which this Exhibit 4.14 is a part, we had repurchased or received documentation of
the transfer of 49,993 Put Shares and 4,472 of the Put Shares continued to be held in the name of the Put
Holders.  We  cannot  determine  at  this  time  what  portion  of  the  Put  Rights  of  the  remaining  95,494  Put
Shares have terminated.

Certain Anti-Takeover Provisions of Our Certificate Incorporation and Bylaws

The  following  is  a  summary  of  certain  provisions  of  our  Certificate  of  Incorporation  and  Bylaws
that  may  have  the  effect  of  delaying,  deterring  or  preventing  hostile  takeovers  or  changes  in  control  or
management of Idera. Such provisions could deprive our stockholders of opportunities to realize a premium
on their stock. At the same time, these provisions may have the effect of inducing any persons seeking to
acquire or control us to negotiate terms acceptable to our Board.

Undesignated Preferred Stock

Our Certificate of Incorporation authorizes our Board to issue shares of preferred stock and set the
voting powers, designations, preferences, and other rights related to that preferred stock without stockholder
approval. Any such designation and issuance of shares of preferred stock could delay, defer or prevent any
attempt to acquire or control us.

Staggered Board

Our Certificate of Incorporation and Bylaws provide for the division of our Board into three classes

as nearly equal in size as possible with staggered three-year terms. The classification of the Board could
have the effect of making it more difficult for a third party to acquire, or of discouraging a third party from
acquiring, control of us. Our Certificate of Incorporation and Bylaws require the affirmative vote of the
holders of at least 75% of the shares of our capital stock issued and outstanding and entitled to vote to
amend or repeal this provision.

Vacancies on the Board of Directors; Removal of Directors

Our Certificate of Incorporation and our Bylaws provide that, subject to any rights of holders of our
preferred stock, any vacancies in our Board for any reason will be filled only by a majority of our directors
remaining in office, and directors so elected will hold office until the next election of directors. The inability
of our stockholders to fill vacancies on the Board may make it more difficult to change the composition of
our  Board.  Additionally,  our  Certificate  of  Incorporation  and  Bylaws  provide  that  a  director  may  be
removed from office by our stockholders only for cause and by the affirmative vote of at least two-thirds of
our outstanding voting stock. Our Certificate of Incorporation and Bylaws require the affirmative

 
vote of the holders of at least 75% of the shares of our capital stock issued and outstanding and entitled to
vote to amend or repeal these provisions.

Cumulative Voting

Our Certificate of Incorporation and Bylaws do not provide for cumulative voting. Accordingly, the
holders of a majority of the shares of common stock entitled to vote in any election of directors may elect
all of the directors standing for election. As a result, subject to the voting rights, of which there currently are
none,  of  any  outstanding  preferred  stock,  persons  who  hold  more  than  50%  of  the  outstanding  common
stock  entitled  to  elect  members  of  our  Board  can  elect  all  of  the  directors  who  are  up  for  election  in  a
particular year.

Business Combinations

We  are  subject  to  Section  203  of  the  Delaware  General  Corporation  Law.  Subject  to  certain
exceptions,  Section  203  prevents  a  publicly-held  Delaware  corporation  from  engaging  in  a  “business
combination” with any “interested stockholder” for three years following the date that such person became
an interested stockholder, unless either the interested stockholder attained such status with the approval of
our Board, the business combination is approved by our Board and stockholders in a prescribed manner or
the interested stockholder acquired at least 85% of our outstanding voting stock in the transaction in which
such  person  became  an  interested  stockholder.  A  “business  combination”  includes,  among  other  things,  a
merger or consolidation involving us and the “interested stockholder” and the sale of more than 10% of our
assets. In general, an “interested stockholder” is any entity or person beneficially owning 15% or more of
our  outstanding  voting  stock  and  any  entity  or  person  affiliated  with  or  controlling  or  controlled  by  such
entity or person.

No Stockholder Action by Written Consent; Special Meeting of Stockholders

Our  Certificate  of  Incorporation  and  our  Bylaws  provide  do  not  provide  for  action  by  written
consent, which may require our stockholders to wait for a regularly scheduled annual meeting to change the
composition  of  our  Board.  Our  Certificate  of  Incorporation  and  our  Bylaws  also  provide  that  special
meetings of our stockholders may be called only by a majority of the Board or by our chief executive officer
or, if the office the chief executive officer is vacant, our president. In no event may our stockholders call a
special meeting of stockholders. Our Certificate of Incorporation and Bylaws require the affirmative vote of
the holders of at least 75% of the shares of our capital stock issued and outstanding and entitled to vote to
amend or repeal these provisions.

Advance Notification of Stockholder Nominations and Proposals

Our Bylaws provide that stockholders seeking to bring business before an annual meeting of
stockholders, or to nominate candidates for election as directors at an annual meeting of stockholders, must
meet specified procedural requirements. These provisions may preclude stockholders from bringing matters
before an annual meeting of stockholders or from making nominations for directors at an annual or special
meeting of stockholders.

 
SECOND AMENDMENT TO LEASE

Exhibit 10.42

THIS SECOND AMENDMENT TO LEASE (“Amendment”) is made this 13  day of January,
2020  by  and  between  505  EAGLEVIEW  BOULEVARD  ASSOCIATES,  a  Pennsylvania  limited
partnership (“Landlord”) and IDERA PHARMACEUTICALS, INC., a corporation (“Tenant”).

th

BACKGROUND

Landlord  and  Tenant  are  parties  to  that  certain  lease  agreement  dated  March  31,  2015,  as
amended  by  Amendment  to  Lease  dated  September  23,  2015  (collectively  the  “Lease”)  relating  to
certain  premises  consisting  of  approximately  11,015  rentable  square  feet,  more  or  less  (“Leased
Space”)  as  shown  on  Exhibit  A  to  the  Lease  in  the  building  known  as  505  Eagleview  Boulevard,
Eagleview  Corporate  Center,  Uwchlan  Township,  Exton,  Chester  County,  Pennsylvania  (the
“Building”). 

NOW THEREFORE, the parties hereto, each intending to be legally bound hereby, agree that

the Lease is hereby amended and modified as follows:

1.

 Extension of Term.  The Term of the Lease is hereby extended for a period of five (5)
years from June 1, 2020 through May 31, 2025 (the “Extension Term”), which shall hereinafter be the
Expiration Date of the Term. 

2.

 Landlord’s Work.  Tenant accepts the Leased Space for the Extension Term, except
that Landlord agrees that, at its expense, it shall provide improvements, described on Exhibit A, to be
further documented by plans and specifications to be reviewed and approved by Landlord and Tenant
prior to the commencement of work, which shall be treated as Landlord’ Work to which Section 8 of
the Lease shall apply.

3.

 Rent for Extension Term.  Effective as of the June 1, 2010, Minimum Annual Rent
payable in accordance with Section 1(h) of the Lease applicable to the Leased Space shall be in the
following amounts:

Lease Period

6/1/2020-5/31/2021
6/1/2021-5/31/2022
6/1/2022-5/31/2023
6/1/2023-5/31/2024
6/1/2024-5/31/2025

Rate Per
Rentable
Square Foot
$20.00
$20.50
$21.00
$21.50
$22.00

Minimum
Annual Rent

Monthly
Installment

$220,300.00
$225,807.50
$231,315.00
$236,822.50
$242,330.00

$18,358.33
$18,817.29
$19,276.25
$19,735.21
$20,194.17

4.

 Amendment to Early Termination Option.

Section 17 of the Lease is amended to substitute for “more than 13,769 rentable square feet”

the phrase “more than 11,015 rentable square feet”.

5.

 Brokers. Tenant and Landlord represent and warrant to each other neither has had any

dealings, negotiations or consultations with Tenant relating to this transaction and that no other

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
broker  or  finder  called  the  Expansion  Space  to  Tenant's  attention  for  lease  or  took  any  part  in  any
dealings, negotiations or consultations relating to the Expansion Space or this Amendment.    Tenant
agrees to be responsible for, indemnify, defend and hold harmless Landlord from and against all costs,
fees  (including,  without  limitation,  attorney's  fees),  expenses,  liabilities  and  claims  incurred  or
suffered  by  Landlord  arising  from  any  breach  by  Tenant  of  Tenant’s  foregoing  representation  and
warranty.  Landlord agrees to be responsible for, indemnify, defend and hold harmless Tenant from and
against  all  costs,  fees  (including,  without  limitation,  attorney's  fees),  expenses,  liabilities  and  claims
incurred  or  suffered  by  Tenant  arising  from  any  breach  by  Landlord  of  Landlord’s  foregoing
representation and warranty.

6.

 Miscellaneous.

(a) 

All capitalized terms not defined herein shall have the same meaning as
the Lease.  From and after the date hereof, except to the extent that the context otherwise requires, the
term “Lease” shall mean the Lease as modified by this Amendment.

(b) 

Except  as  expressly  modified  hereby,  the  terms  and  conditions  of  the
Lease remain unmodified and in full force and effect, which the parties hereby ratify and confirm. In
the  event  of  a  conflict  between  the  terms  of  the  Lease  and  this  Amendment,  the  latter  shall
control.  The foregoing shall apply to Section 44 of the Lease granting to Tenant an option to renew for
an  additional  five  (5)  years,  which  shall  apply  to  a  period  commencing  at  the  end  of  the  Extension
Term.  Without limiting the foregoing, the parties hereby expressly ratify and restate the confession of
judgment as provided in Section 25 of the Lease as follows:

Confession of Judgment

WHEN  THE  LEASE  SHALL  BE  TERMINATED  BY  COVENANT  OR  CONDITION
BROKEN,  EITHER  DURING  THE  ORIGINAL  TERM  OR  ANY  RENEWALS  OR
EXTENSIONS  THEREOF,  AND  ALSO  WHEN  AND  AFTER  THE  TERM  CREATED  OR,
ANY  RENEWAL  OR  EXTENSION  THEREOF  SHALL  HAVE  EXPIRED,  IT  SHALL  BE
LAWFUL  FOR  ANY  ATTORNEY  OF  ANY  COURT  OF  RECORD  AS  ATTORNEY  FOR
TENANT  TO  CONFESS  JUDGMENT  IN  EJECTMENT  AGAINST  TENANT  AND  ALL
PERSONS CLAIMING  UNDER  TENANT,  AND  A  JUDGMENT  FOR  THE RECOVERY BY
LANDLORD  OF  POSSESSION  MAY  ISSUE  FORTHWITH  WITHOUT  ANY  PRIOR  WRIT
OR  PROCEEDINGS  WHATSOEVER.    IF  FOR  ANY  REASON  AFTER  SUCH  ACTION
SHALL  HAVE  BEEN  COMMENCED,  IT  SHALL  BE  CANCELED  OR  SUSPENDED  AND
POSSESSION  OF  THE  LEASED  SPACE  REMAINS  IN  OR  IS  RESTORED  TO  TENANT,
LANDLORD  SHALL  HAVE  THE  RIGHT  UPON  ANY  SUBSEQUENT  DEFAULT  OR
TERMINATION  OF  THE  LEASE,  OR  ANY  RENEWAL  OR  EXTENSION  THEREOF,  TO
BRING  ONE  OR  MORE  ACTIONS  IN  CONFESSION  OF  JUDGMENT  FOR  EJECTMENT
AS  HEREINBEFORE  SET  FORTH  TO  RECOVER  POSSESSION  OF  THE  LEASED
SPACE.    IF  IN  ANY  ACTION  TO  CONFESS  JUDGMENT  IN  EJECTMENT,  LANDLORD
SHALL CAUSE TO BE FILED IN SUCH ACTION AN AFFIDAVIT SETTING FORTH THE
FACTS  NECESSARY  TO  AUTHORIZE  THE  ENTRY  OF  JUDGMENT  AND  IF  A  TRUE
COPY  OF  THE  LEASE  OR  THIS  INSTRUMENT  (AND  THE  TRUTH  OF  THE  COPY
STATED  IN  SUCH  AFFIDAVIT  SHALL  BE  SUFFICIENT  PROOF)  BE  FILED  IN  SUCH
ACTION, IT SHALL NOT BE NECESSARY TO FILE THE ORIGINAL AS A WARRANT OF
ATTORNEY, ANY LAW, RULE OF COURT, CUSTOM OR PRACTICE TO THE

 
 
 
 
CONTRARY  NOTWITHSTANDING.  TENANT  EXPRESSLY  RELEASES  TO  LANDLORD,
AND TO ANY AND ALL ATTORNEYS WHO MAY APPEAR FOR TENANT, ALL ERRORS
IN THE SAID PROCEEDINGS, AND ALL LIABILITY THEREFOR.  TENANT EXPRESSLY
WAIVES THE BENEFIT OF ALL LAWS, NOW OR HEREAFTER IN FORCE, EXEMPTING
ANY GOODS WITHIN THE LEASED SPACE OR ELSEWHERE FROM DISTRAINT, LEVY
OR SALE.

TENANT

IDERA PHARMACEUTICALS, INC.

By: /s/ Vincent J. Milano
Vincent J. Milano, Chief Executive Officer

 (c)

The terms and conditions of the Lease, as amended hereby, constitutes
the whole agreement between the parties and any further amendments or modifications to the terms of
the Lease must be in writing and duly executed by the parties hereto.

(d) 

This Amendment shall be binding upon and shall inure to the benefit of
the parties hereto and their respective heirs and assigns, except as specifically provided herein or in the
Lease, and is not intended to benefit any person or entity not a party hereto.

(e) 

This  Amendment  shall  be  construed  under 

the 

laws  of 

the

Commonwealth of Pennsylvania without regard to conflicts of laws principles.

(f)

This Amendment may be executed in any number of counterparts, each
of which shall be deemed an original and all of which counterparts together shall constitute one and
the same instrument. It shall not be necessary for all parties to execute the same counterpart, so long as
each party shall have executed at least one counterpart, but in this latter event, each party shall have
delivered to it photocopies of counterparts showing signatures of all of the parties.

(g)

This  instrument  may  not  be  recorded  in  the  Office  of  the  Recorder  of

Deeds or any other place of public record.

THE REMAINDER OF THIS PAGE INTENTIONALLY LEFT BLANK

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
IN WITNESS WHEREOF, Landlord and Tenant have executed this Amendment as of the day and
year first above written.

LANDLORD:

505  Eagleview  Boulevard  Associates,  a  Pennsylvania
limited partnership

By:  505  Eagleview  Boulevard  Associates,  Inc.,  its
general partner

By: /s/ Robert S. Hankin
Robert S. Hankin, President

TENANT:

IDERA PHARMACEUTICALS, INC., a corporation

By: /s/ Vincent J. Milano
Vincent J. Milano, Chief Executive Officer

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 23.1

We consent to the incorporation by reference in the following Registration Statements:

Consent of Independent Registered Public Accounting Firm

(1) Registration Statement (Form S-8 No. 333-152669) pertaining to the 2008 Stock Incentive Plan of Idera Pharmaceuticals, Inc.

(2) Registration Statement (Form S-8 No. 333-176067) pertaining to the 2008 Stock Incentive Plan and 1995 Employee Stock Purchase

Plan of Idera Pharmaceuticals, Inc.

(3) Registration Statement (Form S-8 No. 333-191076) pertaining to the 2013 Stock Incentive Plan of Idera Pharmaceuticals, Inc.

(4) Registration Statement (Form S-8 No. 333-197062) pertaining to the 2013 Stock Incentive Plan of Idera Pharmaceuticals, Inc.

(5) Registration Statement (Form S-8 No. 333-202691) pertaining to Inducement Stock Option Awards of Idera Pharmaceuticals, Inc.

(6) Registration Statement (Form S-8 No. 333-206129) pertaining to the 2013 Stock Incentive Plan, as amended, of Idera Pharmaceuticals,

Inc.

(7) Registration Statement (Form S-8 No. 333-210090) pertaining to an Inducement Stock Option Award of Idera Pharmaceuticals, Inc.

(8) Registration Statement (Form S-1 as amended by Form S-3/A No. 333-136610) of Idera Pharmaceuticals, Inc.

(9) Registration Statement (Form S-1 as amended by Form S-3/A No. 333-187155) of Idera Pharmaceuticals, Inc.

(10) Registration Statement (Form S-2 as amended by Form S-3/A No. 333-109630) of Idera Pharmaceuticals, Inc.

(11) Registration Statement (Form S-3 No. 333-119943) of Idera Pharmaceuticals, Inc.

(12) Registration Statement (Form S-3 No. 333-126634) of Idera Pharmaceuticals, Inc.

(13) Registration Statement (Form S-3 No. 333-131804) of Idera Pharmaceuticals, Inc.

(14) Registration Statement (Form S-3 No. 333-133455) of Idera Pharmaceuticals, Inc.

(15) Registration Statement (Form S-3 No. 333-133456) of Idera Pharmaceuticals, Inc.

(16) Registration Statement (Form S-3 No. 333-139830) of Idera Pharmaceuticals, Inc.

(17) Registration Statement (Form S-3 as amended by Form S-3/A No. 333-185392) of Idera Pharmaceuticals, Inc.

(18) Registration Statement (Form S-3 No. 333-186312) of Idera Pharmaceuticals, Inc.

(19) Registration Statement (Form S-3 No. 333-189700) of Idera Pharmaceuticals, Inc.

(20) Registration Statement (Form S-3 No. 333-191073) of Idera Pharmaceuticals, Inc.

(21) Registration Statement (Form S-3 No. 333-210140) of Idera Pharmaceuticals, Inc.

(22) Registration Statement (Form S-8 No. 333-217665) pertaining to an Inducement Stock Option Award of Idera Pharmaceuticals, Inc.

(23) Registration Statement (Form S-8 No. 333-219740) pertaining to the 2017 Employee Stock Purchase Plan of Idera Pharmaceuticals,

Inc.

(24) Registration Statement (Form S-8 No. 333-219741) pertaining to the 2013 Stock Incentive Plan, as amended, of Idera Pharmaceuticals,

Inc.

(25) Registration Statement (Form S-3 No. 333-219851) of Idera Pharmaceuticals, Inc.

(26) Registration Statement (Form S-8 No. 333-232609) pertaining to the 2017 Employee Stock Purchase Plan of Idera Pharmaceuticals,

Inc.

(27) Registration Statement (Form S-8 No. 333-232610) pertaining to the 2013 Stock Incentive Plan, as amended, of Idera Pharmaceuticals,

Inc.

of our reports dated March 11, 2020, with respect to the financial statements of Idera Pharmaceuticals, Inc., and the effectiveness of internal
control over financial reporting of Idera Pharmaceuticals, Inc., included in this Annual Report (Form 10-K) of Idera Pharmaceuticals, Inc. for
the year ended December 31, 2019. 

Philadelphia, Pennsylvania
March 11, 2020

/s/ ERSNT & YOUNG LLP

 
 
 
 
 
Exhibit 31.1

Certification of Chief Executive Officer pursuant to Exchange
Act Rules 13a-14 and 15d-14, as adopted pursuant to
Section 302 of Sarbanes-Oxley Act of 2002

I, Vincent J. Milano, certify that:

1.

I have reviewed this Annual Report on Form 10-K of Idera Pharmaceuticals, Inc.;  

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 annual 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 changes in the registrant’s internal control over financial reporting that occurred

during the registrant’s fourth fiscal quarter 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 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 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 and financial reporting.

Dated: March 11, 2020

/s/ Vincent J. Milano
Vincent J. Milano
Chief Executive Officer

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
Exhibit 31.2

Certification of Chief Financial Officer pursuant to Exchange
Act Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of
Sarbanes-Oxley Act of 2002

I, John J. Kirby, certify that:

1.

I have reviewed this Annual Report on Form 10-K of Idera Pharmaceuticals, Inc.;  

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 annual 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 changes in the registrant’s internal control over financial reporting that occurred

during the registrant’s fourth fiscal quarter 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 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 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 and financial reporting. 

Dated: March 11, 2020

/s/ John J. Kirby
John J. Kirby
Chief Financial Officer

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
Exhibit 32.1

Certification of Chief Executive Officer pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002

In connection with the Annual Report on Form 10-K of Idera Pharmaceuticals, Inc. (the “Company”) for the period

ended December 31, 2019 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the
undersigned, Vincent J. Milano, Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C.
Section 1350, that to his knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934;

and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results

of operations of the Company. 

A signed original of this written statement has been provided to Idera Pharmaceuticals, Inc. and will be retained by

Idera Pharmaceuticals, Inc. and furnished to the Securities and Exchange Commission or its staff upon request. 

Dated: March 11, 2020

/s/ Vincent J. Milano
Vincent J. Milano
Chief Executive Officer

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 32.2

Certification of Chief Financial Officer pursuant to 18 U.S.C.
Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002

In connection with the Annual Report on Form 10-K of Idera Pharmaceuticals, Inc. (the “Company”) for the period

ended December 31, 2019 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the
undersigned, John J. Kirby,  Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350,
that to his knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934;

and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results

of operations of the Company. 

A signed original of this written statement has been provided to Idera Pharmaceuticals, Inc. and will be retained by

Idera Pharmaceuticals, Inc. and furnished to the Securities and Exchange Commission or its staff upon request. 

Dated: March 11, 2020

/s/ John J. Kirby
John J. Kirby
Chief Financial Officer