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Scholar Rock

srrk · NASDAQ Healthcare
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FY2023 Annual Report · Scholar Rock
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Annual 
  Report

NASDAQ: SRRK

To Our 
Shareholders:

As I refl ect on 2023, I have a profound sense of gratitude in 
what we have accomplished together, and I am honored to 
lead Scholar Rock at such a pivotal moment in our history. 
There is a lot to be excited about as we prepare for the 
readout of our Phase 3 registrational study in spinal muscular 
atrophy (SMA) and several other near-term milestones that 
we believe carry tremendous promise for Scholar Rock and 
the patients we serve.

In the past year, we made signifi cant progress in building 
the company by adding key capabilities and completing an 
equity off  ering. We also achieved multiple key milestones 
across our development pipeline including our industry-
leading antimyostatin programs, which have brought us 
closer to realizing our mission of delivering life-changing 
therapies that create new possibilities for people with serious 
diseases.

Starting with apitegromab, our lead program in SMA, we 
completed enrollment of the pivotal Phase 3 SAPPHIRE 
trial, a critical step on the path to bringing apitegromab, a 
potentially transformative therapy, to individuals living with 
SMA. We plan to disclose topline data in the fourth quarter 
of 2024, and if the trial is successful, we expect to initiate 
regulatory applications in the US and Europe. If apitegromab 
is approved, we are planning for commercial product launch 
in 2025, which would mark our transition into a commercial-
stage company. 

Building on our expertise in selective myostatin inhibition, 
we announced the development of SRK-439, a novel 
investigational myostatin inhibitor, heralding our entry 
into cardiometabolic disorders, with a focus on obesity, a 
common, serious, and costly chronic disease. SRK-439 has 
yielded promising preclinical data showing the potential to 
preserve lean mass and improve metabolic health as part of 
healthy weight loss management in combination with GLP-1 
receptor agonists (GLP-1 RA). While GLP-1RAs are highly 
eff  ective in achieving weight loss, they are accompanied 
with signifi cant loss of lean muscle. Scholar Rock’s highly 
selective, muscle-targeted, approach could help patients on 
GLP therapies achieve healthier, more sustainable weight loss 

through preservation of lean muscle mass and the important 
cardiometabolic health benefi ts that come with improved 
body composition. 

We also completed enrollment of the Phase 1 DRAGON 
proof-of-concept trial, which consists of multiple cohorts 
including urothelial carcinoma, cutaneous melanoma, 
non-small cell lung cancer, clear cell renal cell carcinoma, 
and head and neck squamous cell carcinoma. Presented 
data showed that SRK-181, our anti-latent TGFβ1 selective 
monoclonal antibody for the treatment of cancers resistant 
to checkpoint inhibitor therapies, was generally well 
tolerated and showed promising anti-tumor activity in anti-
PD-1 resistant metastatic ccRCC patients. Additionally, 
biomarker data supported proof of mechanism of SRK-181 
across multiple tumor types. We continue to treat patients 
through the trial and remain excited about the prospects of 
SRK-181 in helping patients who have previously failed on 
checkpoint therapy. We look forward to providing additional 
updates on the program in 2024. 

2024 is a signifi cant and potentially transformational turning 
point for our company. As we continue to advance our clinical 
programs and look toward potential commercialization, 
I would like to recognize that these accomplishments are 
only made possible through the support of our shareholders 
and our dedicated employees who are passionate about 
delivering on our promise to patients. With patients at the 
center of our mission, we will continue to work urgently to 
accelerate breakthroughs and bring life-changing therapies 
to those in need.

Sincerely, 

Jay T. Backstrom, MD, MPH
President & Chief Executive Offi    cer

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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

(Mark One)

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

For the Fiscal Year Ended December 31, 2023

OR

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

For the Transition Period from to

Commission File Number: 001-38501

SCHOLAR ROCK HOLDING CORPORATION

(Exact name of Registrant as specified in its charter)

Delaware
(State or Other Jurisdiction of
Incorporation or Organization)

82-3750435
(I.R.S. Employer
Identification Number)

301 Binney Street, 3rd Floor
Cambridge, MA 02142
(857) 259-3860
(Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant’s Principal Executive Offices)

Title of each class
Common Stock, par value $0.001 per share

Trading symbol(s)
SRRK

Name of each exchange on which registered
The Nasdaq Global Select Market

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

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 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 has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b)
of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☐
If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to
previously issued financial statements. ☐
Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers
during the relevant recovery period pursuant to §240.10D-1(b). ☐
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act.) Yes ☐ No ☒
As of June 30, 2023, the last day of the registrant’s most recently completed second fiscal quarter, the aggregate market value of the Common Stock held by non-affiliates of the registrant was
approximately $158.3 million based on the closing price of the registrant’s common stock on June 30, 2023. The calculation excludes shares of the registrant’s common stock held by current executive
officers, directors and stockholders that the registrant has concluded are affiliates of the registrant. This determination of affiliate status is not a determination for other purposes.

As of March 14, 2024, there were 77,866,281 shares of common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive proxy statement for its 2023 Annual Meeting of Stockholders, which the registrant intends to file pursuant to Regulation 14A with the Securities and Exchange
Commission not later than 120 days after the registrant’s fiscal year ended December 31, 2023, are incorporated by reference into Part III of this Annual Report on Form 10-K.

Table of Contents

TABLE OF CONTENTS

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

Business

Item 1.
Item 1A. Risk Factors
Item 1B. Unresolved Staff Comments
Item 1C. Cybersecurity
Item 2.
Item 3.
Item 4. Mine Safety Disclosures

Properties
Legal Proceedings

PART I

PART II

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

Securities
Reserved

Item 6.
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.
Item 9.
Item 9A. Controls and Procedures
Item 9B. Other Information
Item 9C. Foreign Jurisdictions that Prevent Inspections

Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

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

PART III

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

PART IV

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K (“Annual Report”), including the documents incorporated by reference, contains
forward-looking statements within the meaning of the federal securities laws, Section 27A of the Securities Act of 1933, as
amended, and Section 21E of the Securities Exchange Act of 1934, as amended. We intend these forward-looking
statements to be covered by the safe harbor provisions for forward-looking statements contained in the Private Securities
Litigation Reform Act of 1995 and are including this statement for purposes of complying with those safe harbor
provisions. All statements other than statements of historical facts contained in this Annual Report on Form 10-K are
forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as “may”,
“will”, “should”, “expects”, “intends”, “plans”, “anticipates”, “believes”, “estimates”, “predicts”, “potential”, “continue” or
the negative of these terms or other comparable terminology. Some of the risks and uncertainties that may cause our actual
results, performance or achievements to differ materially from those expressed or implied by forward-looking statements
include, among others, the following:

● the success, cost and timing of clinical trials for apitegromab (such as our Phase 3 SAPPHIRE clinical trial) and

SRK-181, including the progress, completion, timing of results, and actual results of our clinical trials;

● the timing, scope, or likelihood of our ability to obtain and maintain regulatory approval from the U.S. Food and

Drug Administration (“FDA”), the European Commission (“EC”) and other regulatory authorities for
apitegromab following completion of our Phase 3 SAPPHIRE clinical trial, and any related restrictions,
limitations or warnings in the label of any approval for apitegromab;

● our success in identifying and executing a development program for our preclinical product candidates, including
SRK-439 and identifying additional product candidates from our preclinical programs and research pipeline;

● our success in identifying and executing development programs for additional indications for apitegromab and

SRK-181;

● the clinical utility of our product candidates and their potential advantages over other therapeutic options;

● our ability to obtain, generally or on terms acceptable to us, funding for our operations, including funding

necessary to complete further development and, upon successful development, if approved, commercialization of
apitegromab, SRK-181, SRK-439 or any of our future product candidates;

● our ability to retain our executives and highly skilled technical and managerial personnel, which could be affected

due to any transition in management, or if we fail to recruit additional highly skilled personnel;

● our expectations regarding our ability to obtain and maintain intellectual property protection for our product

candidates and the duration of such protection and our ability to operate our business without infringing on the
intellectual property rights of others;

● our ability, through third party manufacturers to successfully manufacture our product candidates for clinical

trials and for commercial use, if approved;

● our ability to successfully build a commercial infrastructure to launch and market apitegromab, or otherwise
provide access to apitegromab, if and when it is approved or receives pricing or reimbursement approval;

● our ability to establish or maintain collaborations or strategic relationships;

● our expectations relating to the potential of our proprietary platform technology;

● the size and growth potential of the markets for our product candidates, and our ability to serve those markets,

either alone or in combination with others;

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● the impact of new laws and regulations or amendments to existing laws and regulations in the United States and

foreign countries;

● risks associated with the impact of global economic and political developments on our business, including rising
inflation and capital market disruptions, economic sanctions and economic slowdowns or recessions or public
health pandemics;

● developments and projections relating to our competitors and our industry;

● our estimates and expectations regarding cash, cash reserves, and expense levels, future revenues, capital
requirements and needs for additional financing, including our expected use of proceeds from our public
offerings, and liquidity sources;

● our expectations regarding the period during which we qualify as a “smaller reporting company” as defined by

Rule 12b-2 of the Securities Exchange Act of 1934; and

● other risks and uncertainties, including those listed under the caption Part II, Item 1A “Risk Factors”.

The risks set forth above are not exhaustive. Other sections of this report may include additional factors that could
adversely affect our business and financial performance. Moreover, we operate in a very competitive and rapidly changing
environment. New risk factors emerge from time to time and it is not possible for management to predict all risk factors,
nor can we assess the impact of all risk factors on our business or the extent to which any factor, or combination of factors,
may cause actual results to differ materially from those contained in any forward-looking statements. Given these risks and
uncertainties, investors should not place undue reliance on forward-looking statements as a prediction of actual results.
Investors should also refer to our most recent Annual Report on Form 10-K and our Quarterly Reports on Form 10-Q for
future periods and Current Reports on Form 8-K as we file them with the SEC, and to other materials we may furnish to the
public from time to time through Current Reports on Form 8-K or otherwise, for a discussion of risks and uncertainties that
may cause actual results, performance or achievements to differ materially from those expressed or implied by forward-
looking statements. We expressly disclaim any responsibility to update any forward-looking statements to reflect changes
in underlying assumptions or factors, new information, future events, or otherwise, and you should not rely upon these
forward-looking statements after the date of this report.

We may from time to time provide estimates, projections and other information concerning our industry, the general
business environment, and the markets for certain diseases, including estimates regarding the potential size of those
markets and the estimated incidence and prevalence of certain medical conditions. Information that is based on estimates,
forecasts, projections, market research or similar methodologies is inherently subject to uncertainties, and actual events,
circumstances or numbers, including actual disease prevalence rates and market size, may differ materially from the
information reflected in this Annual Report. Unless otherwise expressly stated, we obtained this industry data, business
information, market data, prevalence information and other data from reports, research surveys, studies and similar data
prepared by market research firms and other third parties, industry, medical and general publications, government data, and
similar sources, in some cases applying our own assumptions and analysis that may, in the future, prove not to have been
accurate.

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Item 1. Business

I.

 Overview

PART I

We are a late-stage biopharmaceutical company focused on the discovery, development and delivery of innovative
medicines for the treatment of serious diseases in which signaling by protein growth factors plays a fundamental role. As a
global leader in transforming growth factor beta (“TGFβ”) superfamily biology, our novel understanding of the molecular
mechanisms of growth factor activation enabled us to develop a proprietary platform for the discovery and development of
monoclonal antibodies that locally and selectively target the precursor, or latent, forms of growth factors. By targeting the
signaling proteins at the cellular level and acting in the disease microenvironment, we believe we may avoid the historical
dose-limiting safety challenges associated with inhibiting growth factors for therapeutic effect. We believe our focus on
biologically validated growth factors may facilitate a more efficient development path.

Based on this proprietary and scalable technology platform, we are building a growing portfolio of novel product
candidates with the aim of transforming the lives of patients suffering from a wide range of serious diseases, including
neuromuscular disorders, cardiometabolic disorders, cancer, fibrosis and iron-restricted anemia. We have discovered and
progressed the development of:

● Apitegromab, an investigational, fully human monoclonal antibody that inhibits myostatin activation by

selectively binding the pro- and latent forms of myostatin in skeletal muscle and is being developed for the
treatment of spinal muscular atrophy (“SMA”). We also believe apitegromab could have potential in the treatment
of other neuromuscular disorders where the inhibition of myostatin may be beneficial.

● SRK-439, a novel, preclinical, investigational myostatin inhibitor that has high invitro affinity for pro- and latent
myostatin and maintains myostatin specificity and is being developed for the treatment of cardiometabolic
disorders.

● SRK-181, an inhibitor of the activation of latent transforming growth factor beta-1 (“TGFβ1”), that is being

developed for the treatment of cancers that are resistant to anti-PD-(L)1 antibody therapies.

● Potent and selective inhibitors of the activation of TGFβ for the treatment of fibrotic diseases. We are advancing
multiple antibody profiles toward product candidate selection including antibodies that selectively inhibit the
activation of latent TGFβ1 in the context of fibrotic extracellular matrix and that avoid perturbing TGFβ1
presented by cells of the immune system.

● Additional discovery and early preclinical programs related to the selective modulation of growth factor signaling

including bone morphogenetic protein 6 (“BMP6”) and other growth factors.

Our first product candidate, apitegromab, is a highly selective, fully human, monoclonal antibody, with a unique
mechanism of action that results in inhibition of the activation of the growth factor, myostatin, in skeletal muscle.
Apitegromab is being developed as a potential first muscle-targeted therapy for the treatment of SMA. We are conducting
SAPPHIRE, a pivotal Phase 3 clinical trial to evaluate the efficacy and safety of apitegromab in patients with
nonambulatory Type 2 and Type 3 SMA (which is estimated to represent the majority of the current prevalent SMA patient
population in the U.S. and Europe). We completed enrollment of SAPPHIRE in 2023, with the top-line data readout
expected in the fourth quarter of 2024. If successful and if apitegromab is approved, we expect to initiate a commercial
product launch in 2025. 

Apitegromab was evaluated in our Phase 2 TOPAZ proof-of-concept clinical trial for the treatment of patients with Type 2
and Type 3 SMA. Positive 12-month top-line results were initially announced in April 2021. We have subsequently
presented data from the TOPAZ trial over 24-months (June 2022) and 36-months (July 2023), which showed that continued
treatment with apitegromab over the extended period was associated with substantial and sustained improvement in motor
function and patient-reported outcomes (via caregiver proxy)in patients with nonambulatory

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Types 2 and 3 SMA receiving an SMN therapy (see “Phase 2 TOPAZ Trial Analysis” below). Additionally, we have a
long-term extension study, ONYX, for patients from both the TOPAZ and SAPPHIRE studies, who are receiving
apitegromab in conjunction with an approved SMN therapy. The FDA granted fast track designation, rare pediatric disease
designation and orphan drug designation to apitegromab for the treatment of SMA in May 2021, August 2020 and March
2018, respectively. The European Medicines Agency (“EMA”) granted Priority Medicines (“PRIME”) designation in
March 2021 and the EC granted orphan medicinal product designation in December 2018 to apitegromab for the treatment
of SMA.

In October 2023, we announced an expansion of our therapeutic focus into cardiometabolic disorders by advancing our
anti-myostatin program with SRK-439, a novel, fully human anti-myostatin monoclonal antibody, for evaluation in
cardiometabolic disorders, including obesity. We are developing SRK-439 towards a potential investigational new drug
application (“IND”) submission in 2025. To inform the development of SRK-439, we plan to initiate a Phase 2 proof-of-
concept trial of apitegromab in combination with GLP-1 receptor agonist (GLP-1 RA) in 2024 with data expected in mid-
2025.

Our second product candidate, SRK-181, a highly selective inhibitor of the activation of latent TGFβ, is being developed
for the treatment of cancers that are resistant to checkpoint inhibitor therapies (“CPI therapies”), such as anti-PD-1 or anti-
PD-L1 antibody therapies (referred to together as anti-PD-(L)1 antibody therapies). SRK-181 was evaluated in our Phase 1
DRAGON proof-of-concept clinical trial in patients with locally advanced or metastatic solid tumors that exhibit resistance
to anti-PD-(L)1 antibody therapies. We completed enrollment of the DRAGON trial in December 2023. This two-part
clinical trial consists of a dose escalation portion (Part A) and a dose expansion portion evaluating SRK-181 in
combination with an approved anti-PD-(L)1 antibody therapy (Part B). Part B commenced in 2021 and includes the
following active cohorts: urothelial carcinoma, cutaneous melanoma, non-small cell lung cancer, clear cell renal cell
carcinoma (“ccRCC”) and head and neck squamous cell carcinoma (“HNSCC”). Safety, efficacy and biomarker data were
presented in November 2023 at the Society for Immunotherapy of Cancer (“SITC”) 38th Annual Meeting. We believe that
the DRAGON trial achieved its study objectives by showing objective, durable clinical responses in patients with ccRCC
resistant to PD-1 therapy above what is expected from continuing PD-1 alone. We expect to present emerging data from the
DRAGON trial at medical meetings in the future.

Beyond these programs, we continue to discover and develop highly specific monoclonal antibodies to selectively
modulate growth factor signaling. Growth factors are naturally occurring proteins that typically act as signaling molecules
between cells and play a fundamental role in regulating a variety of normal cellular processes, including cell growth and
differentiation. Current therapeutic approaches to treating diseases in which growth factors play a fundamental role involve
directly targeting the active form of the growth factor or its receptor systemically throughout the body. These approaches
have suffered from a variety of shortcomings, including lack of pathway selectivity, lack of target selectivity, and non-
localized target inhibition.

Our innovative approach is rooted in our structural biology insights into the mechanism by which certain growth factors are
activated in close proximity to the cell surface. We integrate these insights with sophisticated protein expression,
monoclonal antibody discovery capabilities, and assay development to test the characteristics of our monoclonal
antibodies. We believe our proprietary platform can address the challenges of treating diseases in which growth factors
play a fundamental role by:

● targeting the natural activation mechanism to prevent activation of the growth factor rather than attempting to

inhibit the growth factor after activation;

● achieving heightened specificity for the targeted growth factor while minimizing interactions with structurally
similar and related growth factors, thereby potentially reducing the risk of unintended systemic adverse events;
and

● targeting the disease microenvironment, where we believe we can interfere with the disease process while
minimizing the effects on the normal physiological processes mediated by the same growth factors.

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Our structural insights and unique antibody discovery capabilities can be applied to other protein classes beyond growth
factors, with an aim of generating differentiated candidates targeting cell surface receptors such as immune cell receptors or
G-protein coupled receptors, where selectivity remains challenging.

II. Our Approach and Proprietary Platform

Our innovative approach is rooted in our novel understanding of the molecular mechanisms of growth factor activation and
signaling and is designed to discover and develop monoclonal antibody product candidates that can inhibit the activation of
a growth factor with an unprecedented degree of selectivity. Our proprietary platform is designed to generate product
candidates that target the growth factor’s latent precursor form prior to its activation within the disease microenvironment,
or tissue where it is localized.

Growth factors are naturally occurring proteins that typically act as signaling molecules between cells and play a
fundamental role in regulating a variety of normal cellular processes. Members of the TGFβ superfamily of growth factors,
for example, can mediate diverse biological functions, including cell growth and differentiation, tissue homeostasis,
immune modulation and extracellular matrix remodeling. Growth factors have also been shown to play a fundamental role
in a variety of disease processes. Because of the importance of growth factors in multiple diseases, the pharmaceutical
industry has made many attempts to inhibit growth factors in a variety of therapeutic settings. However, products utilizing
conventional approaches have seen only limited success. Current therapeutic approaches to treating diseases in which
growth factors play a fundamental role involve directly targeting an activated growth factor or its receptor systemically
throughout the body and have suffered from a variety of shortcomings:

● Lack of pathway selectivity—multiple growth factors often signal through the same or overlapping sets of related

receptors, making it difficult to specifically modulate one pathway over another;

● Lack of target selectivity—members of the same growth factor superfamily share considerable structural

similarities, making it difficult to achieve specific inhibition of the targeted growth factor; this can result in broad
systemic inhibition that can cause undesirable, and in many cases toxic, side effects; and

● Lack of disease microenvironment localization—systemic and non-selective inhibition of a growth factor can

block the growth factor’s role in the disease process, but can also simultaneously interfere with its other normal
physiological roles.

Our approach to the discovery and development of growth factor targeted drugs is new and different from traditional
approaches. Our approach of targeting the precursor, or latent forms of growth factors is based on the breakthrough
discovery by the laboratory of our cofounder, Timothy A. Springer, Ph.D. of Harvard Medical School and Boston
Children’s Hospital.

Unlike many other proteins that are produced and secreted by cells in a mature, or active, form, many growth factors are
expressed by cells in a latent form. For example, TGFβ1 is produced by cells as a single protein which is then
enzymatically processed by the cells into two distinct and physically separated domains — the mature growth factor and
the remaining portion of the original protein, referred to as the prodomain — which remain associated as part of a complex.
This secreted complex is latent, or inactive, and must first be activated to carry out its normal function in a highly localized
tissue or disease microenvironment. In a seminal peer-reviewed publication in 2011, Dr. Springer elucidated a new
understanding of the mechanism of activation of the latent growth factor complex among members of the TGFβ
superfamily by solving a high-resolution x-ray crystal structure of this latent form of TGFβ1 (as illustrated in the graphic
below).

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Structural representation of the latent form of TGFβ1 wherein the prodomain wraps around the active growth factor

This research explained at a molecular level why the secreted form of TGFβ1 is inactive. The prodomain, though
physically separated from the mature growth factor domain, forms a “cage” around the active form of TGFβ1, blocking the
growth factor from signaling through its receptor. Only when the cage is “unlocked” by a precursor activation event can the
growth factor be released and mediate its effects in the local microenvironment. Dr. Springer further hypothesized that this
phenomenon likely holds true for most members of the TGFβ superfamily, though the exact nature of the activation event,
such as integrin binding or enzymatic cleavage, may differ among members of the superfamily. Importantly, while many
growth factors are structurally very similar, their cages are structurally diverse, and this provides the basis for our approach
to improved selectivity.

We believe that there are several important advantages to our approach of targeting the precursor, or latent, forms of growth
factors over conventional therapeutic approaches, which inhibit mature growth factors or their receptors systemically
throughout the body:

● targeting the latent precursor allows intervention at the site of action, within the microenvironment of the diseased

tissue. Because our antibodies specifically bind the latent forms of the growth factors, we can prevent the
activation of the growth factors. Given that many growth factors act primarily within the microenvironment
where they are activated, as opposed to exerting their effects systemically, we believe that prevention of
activation is a preferred mode of action for achieving improved outcomes. In contrast, traditional approaches to
targeting growth factor signaling are focused on inhibiting the growth factor after it has been activated and
released systemically;

● targeting the latent precursor allows heightened selectivity among structurally related growth factors, which we

believe could limit off target effects. For example, two members of the TGFβ superfamily, myostatin and GDF11,
are 90% identical in their growth factor domains. Therefore, many of the traditional inhibitors that target
myostatin also inadvertently inhibit GDF11. Similarly, most of the known inhibitors of TGFβ are paninhibitors,
meaning that they do not distinguish among the three isoforms of TGFβ, namely, TGFβ1, TGFβ 2 and TGFβ3.
Despite the sequence similarities of the active forms of these growth factors, their cages are structurally diverse.
We have been able to harness this diversity to generate antibodies that specifically bind the

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inactive growth factor precursors and inhibit activation of a particular growth factor of interest, but not others that
are closely related; and

● targeting these precursor forms in the disease microenvironment, we believe we can interfere with the disease
process while minimizing the effects on the normal physiological processes mediated by growth factors.

To enable our novel approach, we have built a proprietary platform that is rooted in our structural biology insights into
activation of latent growth factor precursors. We integrate these insights with sophisticated protein expression, monoclonal
antibody discovery capabilities, and assay development to test the characteristics of our monoclonal antibodies. In addition
to this know-how, our proprietary platform is covered by patents projected to expire well into the 2030s, excluding any
patent term adjustments or extensions. The key elements of our proprietary platform include the following:

● focusing on growth factor targets with a high degree of evidence implicating them in a disease process or

processes;

● utilizing structural biology insights to generate recombinant versions of the latent forms of targeted growth

factors, as well as versions of closely related growth factors utilizing proprietary technology and in-house
expertise;

● developing proprietary assays in which we are able to recapitulate the natural activation mechanism that these

growth factors undergo in the human body;

● designing sophisticated selection strategies utilizing recombinant antibody libraries such as phage and yeast
display that allow us to identify monoclonal antibodies, a well-established therapeutic modality, that can
modulate the activation of these growth factors without having an effect on the activation of other closely related
growth factors; and

● optimizing the output of such selections to ensure that our product candidates have the appropriate characteristics

for manufacturability and further development.

Using our innovative approach and proprietary platform, we are creating a pipeline of novel product candidates that
selectively modulate the activation of growth factors implicated in a variety of serious diseases. Our structural insights and
unique antibody discovery capabilities can also be applied to other protein classes beyond growth factors, with an aim of
generating differentiated candidates targeting cell surface receptors such as immune cell receptors or G-protein coupled
receptors, where selectivity remains challenging.

III. Our Expertise

We have assembled an experienced management team, board of directors, and scientific founders who bring extensive
industry experience to our company. The members of our team have deep experience in discovering, developing and
commercializing therapeutics, having worked at companies such as: Acceleron Pharma, Inc.; Alnylam Pharmaceuticals,
Inc.; AMAG Pharmaceuticals, Inc.; Celgene Corporation; Foundation Medicine, Inc.; and Novartis Pharmaceuticals. We
were founded by internationally respected scientists, Drs. Timothy A. Springer and Leonard I. Zon of Harvard Medical
School and Boston Children’s Hospital.

IV. Our Strategy

Using our proprietary platform to unlock the therapeutic potential of targeting growth factor signaling in the disease
microenvironment, our goal is to deliver novel therapies to underserved patients suffering from a wide range of serious
diseases, including neuromuscular disorders, cardiometabolic disorders, cancer, fibrosis and iron-restricted anemia. To
achieve this goal, we plan to:

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● Continue advancing apitegromab in SMA to characterize its potential to offer meaningful benefit to patients.  
We are developing our first product candidate, apitegromab, for the treatment of patients with SMA. By targeting 
the latent form of myostatin and specifically inhibiting its activation in muscle, we believe apitegromab holds 
considerable promise in improving motor function in patients with SMA. We are conducting SAPPHIRE, a 
pivotal Phase 3 trial to evaluate the efficacy and safety of apitegromab in patients with nonambulatory Type 2 and 
Type 3 SMA being treated with survival motor neuron (“SMN”) therapy (e.g., therapies that upregulate the 
expression of SMN, such as SMN splicing modulators). 

● Identify the next indication(s) for apitegromab.  Our goal is to maximize the value of apitegromab by exploring
its potential across SMA types and in other myostatin-related indications. We believe that the role of apitegromab
as a muscle-targeted therapy could have broad potential beyond SMA, spanning multiple muscle disorders in
which fast-twitch fibers may play an important role in motor function. There is also increasing recognition of the
important role of skeletal muscle in modulating metabolic physiology, highlighting a potential therapeutic
opportunity for myostatin blockade. We have efforts underway to evaluate these opportunities, including
preclinical and translational research, development path assessments, and commercial evaluations.

● Leverage anti-myostatin expertise to expand into cardiometabolic disorders.  Muscle plays a key role in 

metabolic functions and energy homeostasis. Leveraging the effect of anti-myostatin on increasing muscle mass 
and our expertise in selectively targeting anti-myostatin, we have been developing myostatin-selective inhibitors 
to address cardiometabolic disorders, including obesity. Our platform has generated multiple anti-myostatin 
antibodies, including apitegromab, that selectively target pro- and latent forms of myostatin. SRK-439, a novel 
anti-myostatin antibody in preclinical development by us, has attractive properties, including high in vitro affinity 
for pro- and latent myostatin, maintenance of myostatin specificity (i.e., no GDF11 or Activin-A binding), and 
robust in vivo efficacy in preclinical models. We believe the selectivity of these product candidates enables a 
favorable risk-benefit profile for patients with cardiometabolic disorders.

● Advance our TGFβ1 product candidate, SRK-181, through clinical proof-of-concept.  Our second antibody

program is focused on the discovery and development of potent and selective inhibitors of the activation of latent
TGFβ1. We believe that the selectivity of SRK-181, as observed in preclinical studies, is a significant
differentiator in our efforts to address the historical dose-limiting safety challenges resulting from non-selectively
inhibiting multiple isoforms that activate the TGFβ signaling pathway. We have completed enrollment of the
Phase 1 proof-of-concept clinical trial of SRK-181 in patients with locally advanced or metastatic solid tumors
that are experiencing resistance to anti-PD-(L)1 antibody therapy. Data from the DRAGON trial supports proof-
of-concept for SRK-181 in heavily pre-treated patients with ccRCC resistant to anti-PD-(L)1 therapy.
Additionally, we believe that SRK-181 has the potential to address unmet medical needs in other oncology
indications, and we will endeavor to maximize the value of this product candidate.

● Continue to leverage our proprietary platform to expand our pipeline beyond current lead programs.  We will 
continue to leverage and expand our proprietary platform to selectively target the activation of additional growth 
factors, both within and beyond the TGFβ superfamily. Given the established role of signaling by protein growth 
factors in numerous diseases, we believe that these efforts could result in new opportunities to treat diseases with 
unmet medical need. In order to support our pipeline expansion and intention to be the leader in the field of 
growth factor-targeted drug development, we are investing in the technologies supporting our proprietary 
platform. We have designed a proprietary, state of the art, antibody display library to more efficiently identify 
differentiated candidate antibodies. Furthermore, we believe that our structural insights have applicability beyond 
growth factor activation to include other cell signaling mechanisms. 

We believe that additional product candidates in the TGFβ portfolio have the potential to address other disorders
associated with increased TGFβ signaling, including tissue and organ fibrosis. To advance the discovery and
development of selected inhibitors originating from our TGFβ program that we believe have the potential to
address unmet medical needs in non-oncology indications, we entered into a three-year fibrosis-focused
collaboration with Gilead Sciences, Inc. (“Gilead”) in 2018. At the conclusion of the agreement in

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January 2022, the rights to the respective antibodies reverted to us. We have identified a suite of anti-fibrotic
antibodies with novel selectivity profiles that were discovered over the course of the collaboration including those
which may have therapeutic potential for the treatment of organ fibrosis by inhibiting TGFβ1 function in
connective tissue while having no impact on the activation or signaling of TGFβ1 in the immune system. We plan
to continue the advancement of these assets as part of our growing preclinical pipeline.

In addition, using our structural insight, we have identified modulators of BMP 6 (a TGFβ superfamily growth
factor) by selectively inhibiting its co-receptor RGMc or hemojuvelin which is required for activation. BMP6
functions as a critical control point in iron modulation via regulation of hepcidin. Traditional approaches to
inhibiting the signaling of BMP6 systemically would likely perturb the numerous different physiological
processes in which BMP6 is involved. Our approach could provide the potential for tissue specific modulation of
BMP signaling and iron regulation.

● Selectively seek strategic collaborations to maximize the value of our proprietary platform and pipeline. Given
the potential of our proprietary platform to generate novel product candidates that could treat a wide variety of
diseases, we believe that we can maintain in-house discipline with respect to our key development and
commercialization efforts, while at the same time maximizing the full potential of our proprietary platform for
other disease areas and indications. As a result, we may seek additional strategic collaborations around certain
targets, product candidates or disease areas that we believe could benefit from the resources of either larger
biopharmaceutical companies or those specialized in a particular area of relevance.

V. Our Pipeline

Using our innovative approach and proprietary platform, we are creating a differentiated pipeline of novel product
candidates that selectively inhibit the activation of latent growth factors believed to be important drivers in a variety of
diseases, including neuromuscular disorders, cardiometabolic disorders, cancer, fibrosis, and iron-restricted anemia. Our
proprietary platform includes (i) our know-how enabling expression and purification of latent protein growth factor
complexes in quantity and quality sufficient to enable antibody discovery; (ii) strategies to identify rare antibodies that
selectively bind targeted latent protein growth factor complexes; and (iii) assays developed by us to test the highly selective
antibodies’ ability to modulate the activation of specific latent growth factors. We have worldwide rights to our proprietary
platform and all of our product candidates.

The following summarizes our pipeline programs:

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VI. Our Product Candidates

a. Latent Myostatin

Utilizing our proprietary platform, we targeted the precursor form of myostatin and generated two novel antibodies, each
with a design tailored for specific patient populations: apitegromab for SMA and SRK-439 for obesity. Both antibodies are
novel, highly selective inhibitors of the activation of myostatin from its inactive precursor in skeletal muscle, where
myostatin resides and signals upon activation. While mature myostatin is 90% identical in the growth factor domain to its
most closely related TGFβ superfamily member, GDF11, the prodomain that cages mature myostatin and keeps it in its
latent precursor form is only 52% identical to the GDF11 prodomain.

In preclinical studies, we have shown that apitegromab selectively avoids interaction with other closely related growth
factors that play distinct physiological roles. We observed multi-fold increases in serum latent myostatin levels in mouse
models of both early and late SMN restoration and that apitegromab promoted increased strength (as measured by torque
generation) in SMN-deficient mice. In a Phase 1 clinical trial designed to evaluate the safety, tolerability, and
pharmacokinetic (“PK”) /pharmacodynamic (“PD”) profile of apitegromab in adult healthy volunteers, there were no dose-
limiting toxicities and we observed robust and sustained target engagement following administration of apitegromab.

SRK-439 has also shown robust preclinical efficacy, as detailed in “Cardiometabolic Disorders – SRK-439 (inhibitor of
latent myostatin)” section below. We believe that these results, from two diet-induced obesity (“DIO”) mice models
provide the scientific rationale and support the hypothesis that inhibition of myostatin in combination with GLP-1 receptor
agonist (“RA”)-driven weight loss may lead to retention of lean muscle.

i. Role of Myostatin

Myostatin, also known as growth differentiation factor 8 (“GDF8”), is a member of the TGFβ superfamily and is produced
by skeletal muscle cells. As with other tissues and organs in the human body, healthy muscle homeostasis is maintained by
a proper balance of growth signals, or anabolic stimuli, and breakdown signals, or catabolic stimuli. In

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humans, the anabolic stimuli that drive muscle growth are proteins, such as the human growth hormone and the insulin like
growth factor 1. In contrast, myostatin is a catabolic agent that functions as a negative regulator of muscle mass.

Skeletal muscle fibers are generally classified as fast twitch or slow twitch. Fast twitch fibers play a key role in motor
activities, such as those involving quick bursts of strength. In contrast, slow twitch fibers are important for endurance
activities. Animals lacking functional myostatin genes, or its receptor, have larger muscles and increased strength
compared to normal animals. While the absence of myostatin does lead to overall increases in muscle mass, a preferential
effect on muscles enriched for fast twitch muscle fibers has been observed in animals. Such animals are otherwise healthy
and live a normal lifespan.

ii.  Traditional Approaches and Challenges

Because of its role in regulating muscle mass, myostatin has been a popular target for a variety of drug development
programs. There have been two general approaches to trying to inhibit the signaling of myostatin in humans. The first is to
develop an antibody, or an antibody-like molecule, that binds to mature myostatin in circulation and prevents its ability to
signal through its receptor, the ActRIIb receptor. The second is to develop an antibody to the ActRIIb receptor itself, or a
soluble decoy of the ActRIIb receptor, with a goal of preventing myostatin signaling through its receptor. Both of these
approaches, however, have significant limitations.

As a member of the TGFβ superfamily, mature myostatin shares considerable structural similarity with other family
members. For example, the active form of myostatin and its most closely related family member, GDF11, are 90% identical
in the growth factor domains, making it extremely challenging to identify antibodies that are truly specific for myostatin
and do not interfere with other targets. Moreover, attempts to interrupt myostatin signaling through its receptor are
complicated by the fact that the ActRIIb receptor, in addition to being the receptor for myostatin, is also the receptor for a
number of related family members, including GDF11, activins and other growth factors. Attempts to block the signaling of
myostatin by targeting its receptor therefore inevitably interfere with the signaling of these other growth factors, many of
which are involved in normal biological processes unrelated to muscle.

There are multiple examples of clinical trials demonstrating the risk of non-selective inhibition of myostatin. For example,
in a Phase 2 clinical trial in Duchenne Muscular Dystrophy reported in 2017, a soluble decoy of the ActRIIb receptor
resulted in bleeding side effects believed by the sponsor to be unrelated to inhibition of myostatin signaling, but instead
related to the inhibition of signaling by certain other members of the TGFβ superfamily known to be important in the
maintenance of vascular integrity. These side effects resulted in termination of the clinical program. More recently, results
from a clinical trial were reported showing that treatment of patients with an antibody to the ActRIIb receptor resulted in
suppression of the levels of follicle stimulating hormone, an important reproductive hormone. In this clinical trial, the
sponsor believed that these effects were likely related to inhibition of signaling through the ActRIIb receptor.

iii.  Spinal Muscular Atrophy: Apitegromab (inhibitor of latent myostatin activation)

We believe that the therapeutic potential for apitegromab in improving motor function is more optimal when a given
disease bears certain features. Based on our translational and preclinical efforts, we have formulated a set of guiding
principles to inform indication selection within the category of neuromuscular disease. As summarized in the table below,
we believe that the pathobiological and clinical characteristics of SMA are well-aligned with these guiding principles.
Since myostatin regulates muscle catabolism rather than anabolism, we believe that having a background of anabolic
capacity is important to drive muscle growth in the setting of myostatin inhibition. Anabolic capacity is most robust in
younger individuals and diminishes as one ages. SMA is a genetic disorder with onset commonly in childhood, and the
initial focus of the development program will be in children and young adults. Furthermore, in SMA, there is a significant
but incomplete loss of motor neurons, ensuring at least some intact signaling between skeletal muscle and nerve. In
addition, generally, there are also no apparent structural abnormalities in the skeletal muscle. The partial loss of motor
neurons causes substantial atrophy of fast-twitch muscle fibers that in turn leads to many of the motor function
impairments. Validated outcome measures are available for SMA clinical trials that are relevant to fast-twitch fiber activity.
These outcome measures, such as the Hammersmith Functional Motor Scale – Expanded (“HFMSE”), assess motor
activities that involve short-term bursts of strength, which are driven by fast-twitch muscle fibers. These endpoints
therefore measure an outcome that may be more likely to be directly affected by apitegromab.

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Key disease features of SMA are aligned with Scholar Rock’s guiding principles for neuromuscular indication selection
for apitegromab

We are developing apitegromab as a selective muscle-targeted therapy for the treatment of SMA. Myostatin, a member of
the TGFβ superfamily of growth factors, is expressed primarily in skeletal muscle cells and the absence of its gene is
associated with an increase in muscle mass and strength in multiple animal species. We believe that inhibition of the
activation of myostatin may promote a clinically meaningful increase in motor function.

Apitegromab was evaluated in our Phase 2 TOPAZ proof-of-concept clinical trial for the treatment of patients with Type 2
and Type 3 SMA and positive 12-month top-line results were announced in April 2021. See “Phase 2 TOPAZ Trial
Analysis” below. We are currently conducting SAPPHIRE, a pivotal Phase 3 clinical trial to evaluate the efficacy and
safety of apitegromab in patients with nonambulatory Type 2 and Type 3 SMA receiving SMN therapy. We completed
enrollment of SAPPHIRE in 2023, with the top-line data readout expected in the fourth quarter of 2024. If successful and if
apitegromab is approved, we expect to initiate a commercial product launch in 2025.

We believe that apitegromab has the potential to be the first muscle-targeted therapy which is aimed at improving motor
function in patients with SMA who are receiving an SMN therapy. We have identified multiple other diseases for which the
selective inhibition of the activation of myostatin may offer therapeutic benefit, including additional patient populations in
SMA (such as patients under the age of two with SMA and ambulatory patients with SMA) and indications for other
neuromuscular disorders beyond SMA.

1.  Background on SMA

SMA is a rare, and often fatal, genetic disorder that typically manifests in young children. It is characterized by the loss of
motor neurons, atrophy of the voluntary muscles of the limbs and trunk and progressive muscle weakness. Disease severity
in SMA can range from patients who die soon after birth to patients who live into adulthood with varying degrees of
morbidity. The underlying pathology of SMA is caused by insufficient production of a protein known as “survival of motor
neuron,” or SMN. The SMN protein, essential for the survival of motor neurons, is encoded by two genes, SMN1 and
SMN2.

● SMN1 genes produce the majority of functional SMN protein; healthy individuals have one or two functional

copies of SMN1, while patients with SMA have mutations in or deletions of both copies of the gene.

● SMN2 genes produce only 10% to 20% of functional SMN protein and an individual’s copy number of the SMN2

gene can range from zero to eight. In SMA patients, the number of SMN2 genes present in their genome

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is correlated with disease onset and severity; patients who have a lower number of SMN2 gene copies generally
develop earlier and more severe SMA, because they produce less SMN protein.

2.  SMA Natural History and Epidemiology

SMA, the most common monogenic cause of death in infants, is a rare neuromuscular disorder. An estimated 20,000
patients suffer from SMA in the U.S. and Europe alone. Patients with SMA can be categorized as one of four types, Type 1
through Type 4. The majority of SMA patients currently living in the U.S. and Europe are estimated as having Type 2 or
Type 3 disease, although it should be noted that this percentage may evolve over time and the definitions of traditional
SMA types are themselves evolving. Nonambulatory Type 2 and Type 3 SMA, as they have traditionally been defined, is
the initial focus of investigation in our SMA development program.

3.  Unmet Medical Need in SMA

We view the emerging landscape for the development of novel medicines for SMA as being classified into two distinct but
complementary therapeutic strategies: 1) SMN therapy (also known as SMN corrector therapy or SMN-directed therapy)
and 2) muscle-targeted therapy. Despite progress in the development of SMN therapies, a high unmet medical need to
improve motor function remains. We believe that the advancement of muscle-targeted therapy will be necessary to address
this important gap.

SMN therapies are aimed at addressing the SMN deficiency to prevent further motor neuron deterioration thus modifying
the course of disease. This category includes antisense oligonucleotide and small molecule approaches to increase SMN2
expression as well as gene therapy to deliver the SMN1 gene. Early intervention at a very young age is therefore thought to
be essential to prevent significant motor functional deterioration. However, for the vast majority of SMA patients living
today, this early intervention window has been missed, and such individuals suffer from severe functional impairment.
Thus, regardless of the precise nature or mechanism of action for any given SMN therapy, we believe that most SMA
patients will continue to experience clinically significant functional deficits.

To address this need, apitegromab is being developed as a potential first muscle-targeted therapy for SMA. We envision the
potential for apitegromab to be standard use with any SMN therapy in patients with Type 2 and 3 SMA in order to drive
absolute increases in functional performance over baseline.

4.  Clinical Development Overview

We are currently conducting SAPPHIRE, a pivotal Phase 3 clinical trial to evaluate the efficacy and safety of apitegromab
in patients with nonambulatory Type 2 and Type 3 SMA being treated with SMN therapy.

Beyond Type 2 and Type 3 SMA, we believe that apitegromab has the potential for therapeutic benefit in patients with
either more or less severe forms of SMA, as well as pre-symptomatic patients receiving early intervention with a SMN
therapy.

Our aim is to develop apitegromab for the broadest group of patients suffering from SMA. The FDA granted fast track
designation, rare pediatric disease designation and orphan drug designation to apitegromab for the treatment of SMA in
May 2021, August 2020 and March 2018, respectively. The EMA granted PRIME designation in March 2021 and the EC
granted orphan medicinal product designation in December 2018 to apitegromab for the treatment of SMA.

5.  Phase 3 SAPPHIRE Pivotal Trial Design

SAPPHIRE is a randomized, double-blind, placebo-controlled, Phase 3 clinical trial. A total of 188 patients aged 2-21
years old with nonambulatory Type 2 or Type 3 SMA who are receiving an SMN therapy, either nusinersen or risdiplam,
are enrolled in the study, including 156 patients aged 2-12 years old in the main efficacy population and 32 patients aged
13-21 years old in the exploratory subpopulation. Patients in the main efficacy population were randomized 1:1:1 to
receive for 12 months either apitegromab 10 mg/kg, apitegromab 20 mg/kg, or placebo by intravenous (IV) infusion every
4 weeks. Patients in the exploratory subpopulation were randomized 2:1 to receive either apitegromab 20 mg/kg or
placebo.

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Additional key elements of the study design include the following:

● At baseline, all patients will be required to be in the chronic maintenance phase of SMN therapy, corresponding

to either at least 6 months of prior treatment in the case of risdiplam or at least 10 months of prior treatment in the
case of nusinersen.

● Randomization of patients will be stratified by both the SMN therapy (nusinersen vs. risdiplam) as well as the age

at which SMN therapy had been initiated (< 5 years vs. ≥ 5 years).

● The primary efficacy endpoint will evaluate the mean change from baseline in the HFMSE total score after 12

months of treatment.

● Additional endpoints will evaluate safety, proportion of patients with ≥3-point HFMSE increase, Revised Upper
Limb Module (“RULM”), World Health Organization (“WHO”) motor developmental milestones, PK, PD, anti-
drug antibody, and other outcome measures.

6.  Phase 2 TOPAZ Proof-of-Concept Trial

We completed enrollment in our Phase 2 TOPAZ proof-of-concept trial of apitegromab in SMA in January 2020. One
patient discontinued from the 12-month treatment period for reasons that were determined to be unrelated to apitegromab
treatment. All remaining patients completed the 12-month treatment period and opted into the extension period. More than
90 percent of nonambulatory patients remained on treatment in the extension study.

The clinical trial consisted of three distinct cohorts of patients with Type 2 or Type 3 SMA and evaluated the safety and
efficacy of apitegromab over a 12-month treatment period. All patients in the clinical trial received apitegromab dosed
every four weeks (Q4W) either as a monotherapy or in conjunction with an approved SMN therapy. In our view, this
approach of having evaluated multiple distinct cohorts offers a greater number of opportunities to discern the effects of
apitegromab on clinically meaningful motor function measures across multiple patient subpopulations.

The primary efficacy objectives evaluated in the TOPAZ trial, HFMSE and Revised Hammersmith Scale (“RHS”), are
clinically meaningful outcome measures validated for SMA. The HFMSE is a validated measure for the assessment of
gross motor function in SMA, while the RULM is validated to evaluate upper limb motor performance by evaluating tasks
which correspond to the ability to perform various everyday activities with their hands and arms.

Our overall approach to the efficacy analysis is informed by SMA disease biology, the anticipated mechanism of action of
apitegromab, the effects of SMN therapy, and available clinical data on SMA. The primary effect of SMN therapy appears
to be to address the SMN deficiency and the resulting motor neuron degeneration Natural history data indicate that most
patients with Types 2 or 3 SMA, other than very young individuals, generally have a stable functional baseline over a 12-
month period as evidenced by their HFMSE scores. Long-term data on patients treated with SMN therapy showed that
motor function generally plateaus after an initial increase. A one-point improvement on the Hammersmith scale may be
considered meaningful on an individual level and an improvement of 3 or more points from baseline would be considered
meaningful.

7.  TOPAZ 36-Month Analysis

In July 2023, at the Cure SMA Research & Clinical Care Meeting, we presented 36-month efficacy and safety
extension data of apitegromab from TOPAZ. These data showed that continued treatment with apitegromab over the
extended period was associated with substantial and sustained improvement in motor function (shown in the table below),
and patient-reported outcomes in patients with nonambulatory Types 2 and 3 SMA receiving an SMN therapy.

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For the 36-month data, an observed case analysis was conducted, which pooled data for all nonambulatory patients ages 2-
21 (including those patients on 20 mg/kg of apitegromab for the full duration of the trial, and those who switched from 2
mg/kg to 20 mg/kg at various time intervals in year 2). As shown in the table above, the mean change from baseline in
HFMSE at 36 months was +4.0 and mean change from baseline in RULM (measuring upper limb function) at 36 months
was +2.4. These analyses exclude data for patients post scoliosis surgery as such surgery is a known confounding factor for
motor function assessment.

Improvement in patient-reported outcomes were consistent with improvements in motor function. Nonambulatory patients
(ages 2-21) had improvements in PEDI-CAT (measure of activities of daily living) and PROMIS-Fatigue (a patient-
reported questionnaire measuring fatigue) that were sustained at 36 months. The mean change in PEDI-CAT daily activity
domain from baseline at 36 months was 2.2 (95% CI: –0.1, 4.5; N=17), indicating an improvement in the ability to perform
daily activities. The mean change in PROMIS-Fatigue from baseline at 36 months was –4.6 (95% CI: –8.7, –0.5; N=14),
indicating a decline in fatigue.

Treatment-emergent adverse events (“TEAEs”) at 36 months were consistent with previous reports at 12 and 24 months,
with no new findings after an aggregate of 198 patient-years of exposure. TEAEs were mostly mild-to-moderate in
severity, and generally consistent with the underlying patient population and background therapy. The five most common
TEAEs were headache, pyrexia, COVID-19, nasopharyngitis, and upper respiratory tract infection. No deaths or suspected
unexpected serious adverse reactions or hypersensitivity reactions were observed with apitegromab at 36 months. No
patients displayed positive titers for apitegromab antibodies (“ADA”).

8.  TOPAZ 12-Month Analysis

On April 6, 2021, we announced positive top-line data for the 12-month treatment period of our Phase 2 TOPAZ proof-of-
concept trial, which enrolled 58 patients with Type 2 and Type 3 SMA across 16 study sites in the United States and
Europe. The clinical trial evaluated the safety and efficacy of intravenous apitegromab dosed every four weeks (Q4W) over
a 12-month treatment period. Four patients (one in Cohort 2 and three in Cohort 3) each missed three consecutive doses of
apitegromab over the course of the 12-month treatment period due to COVID-19-related site access restrictions and were
excluded from the prespecified intent-to-treat primary analysis.

The study participants were enrolled into one of three cohorts. Cohort 1 consisted of individuals aged 5–21 years with
ambulatory Type 3 SMA; receiving apitegromab either as a monotherapy or in conjunction with an approved SMN therapy
(nusinersen). Cohort 2 comprised individuals aged 5–21 years with Type 2 or nonambulatory Type 3 SMA who were all
receiving nusinersen and had initiated their nusinersen therapy after reaching 5 years of age. Cohort 3 consisted of
nonambulatory individuals aged 2 years or older with Type 2 SMA who were receiving nusinersen and had initiated their
nusinersen therapy before 5 years of age. All patients received apitegromab by intravenous infusion every 4 weeks. During
the primary treatment period, patients in Cohorts 1 and 2 received open-label apitegromab 20 mg/kg, and patients in Cohort
3 were randomized to double-blind apitegromab 2 mg/kg or 20 mg/kg. In the extension periods, patients who received
apitegromab 20 mg/kg in the primary treatment period continued their dose; patients originally receiving apitegromab 2
mg/kg transitioned to apitegromab 20 mg/kg.

Results of the primary analysis showed that apitegromab treatment was associated with improved motor function as
measured by the HFMSE and the RULM, and with a favorable safety profile at 12 months (Crawford Neurology 2024 and
table below). An ITT sensitivity analysis of efficacy including data from all 58 patients enrolled showed consistent
findings.

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aFour participants in Cohort 3 (n=3) and Cohort 2 (n=1) each missed three doses of apitegromab during the 12-month
treatment period due to COVID-19-related site access restrictions and were not included in the primary analysis. One
subject among the older (5-21 years) non-ambulatory participants received concomitant treatment with an
acetylcholinesterase inhibitor before and during the trial and was excluded from the per-protocol analysis due to this
protocol violation.

HFMSE, Hammersmith Functional Motor Scale Expanded; RHS, Revised Hammersmith Scale

Dose response was observed; the 20 mg/kg dose achieved numerically greater mean improvements from baseline in
HFMSE scores than the 2 mg/kg dose across all assessed timepoints in the 12-month treatment period. The clinically
observed dose response was consistent with the PD (target engagement) results. Both the 20 mg/kg and 2 mg/kg doses
yielded high levels of target engagement (>100-fold increase from baseline), but the 20 mg/kg dose led to a relatively
higher absolute level of target engagement.

Overall safety and tolerability profile:

● Incidence and severity of adverse events were consistent with the underlying patient population and SMN

therapy.

● Five most frequently reported treatment-emergent adverse events: headache (24%), pyrexia (22%), upper

respiratory tract infection (22%), cough (22%), and nasopharyngitis (21%).

● Five patients experienced a serious treatment-emergent adverse event, all assessed by the respective trial

investigator as unrelated to apitegromab:

o One patient treated with 2 mg/kg dose (Cohort 3) hospitalized due to adenoidal hypertrophy and tonsillar
hypertrophy to perform scheduled adenotonsillectomy (Grade 2). Event resolved without sequelae.

o Two patients treated with 20 mg/kg dose (both Cohort 1) with gait inability considered a significant

disability (both Grade 3). Events remain ongoing.

o One patient treated with 20 mg/kg dose (Cohort 1) hospitalized with post lumbar puncture syndrome

(Grade 2). Event resolved without sequelae.

o One patient treated with 20 mg/kg dose (Cohort 1) hospitalized due to viral upper respiratory tract

infection (Grade 2). Event resolved without sequelae.

● One patient (Cohort 1) presented with a non-serious Grade 3 post lumbar puncture syndrome; assessed by trial

investigator as unrelated to apitegromab. Event resolved without sequelae.

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● One patient (Cohort 1) discontinued from the clinical trial due to Grade 2 muscle fatigue that started prior to
initiation of dosing with study drug; assessed by the clinical trial investigator as unrelated to apitegromab.

9.  Phase 1 Healthy Volunteer Clinical Trial Results

The randomized, double-blind, placebo-controlled, first-in-human, Phase 1 clinical trial was designed to evaluate the safety
and tolerability, immunogenicity, PK, and PD of IV administered apitegromab in adult healthy volunteers. A total of 66
subjects were enrolled, including 40 subjects in the single ascending dose (“SAD”) and 26 subjects in the multiple
ascending dose portions of the study. Full results from the Phase 1 clinical trial were presented at the Cure SMA Annual
Conference in June 2019.

Safety and immunogenicity results. Apitegromab was shown to be well-tolerated with no apparent safety signals. There
were no dose-limiting toxicities identified up to the highest tested dose of 30 mg/kg, treatment-related serious adverse
events (“SAEs”) or hypersensitivity reactions. Immunogenicity was assessed by anti-drug antibody testing, and all subjects
tested negative.

Pharmacokinetics and pharmacodynamics results. Apitegromab displayed a PK profile generally consistent with that
commonly observed with monoclonal antibodies. Drug exposure was dose proportional, and the serum half-life was
approximately 23 to 33 days across the apitegromab dose groups. The findings supported the investigation of a once every
4-week dosing regimen in the Phase 2 TOPAZ clinical trial.

Mean serum concentrations of latent myostatin in the SAD were < 20 ng/ml in the pre-treatment baselines for apitegromab
treated subjects as well as in placebo subjects throughout the study. Following placebo treatment, there was no meaningful
change in the latent myostatin biomarker concentrations. Following single doses of apitegromab at dose levels of 3 mg/kg
or greater, marked increases in latent myostatin biomarker concentrations in the serum, by at least an order of magnitude,
were observed following apitegromab treatment. This finding demonstrates successful target engagement and provides
initial proof-of-mechanism in humans of our therapeutic approach of targeting the latent form of growth factors. The
observation also corroborates our biological understanding that the vast majority of drug target (pro and latent forms of
myostatin) resides within skeletal muscle rather than within the systemic circulation.

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Apitegromab engages latent myostatin in Phase 1 clinical trial subjects

10.  Apitegromab in Other Disorders Where the Inhibition of Myostatin May Be Beneficial

We see potential for apitegromab broadly across SMA (such as patients under the age of two with SMA and ambulatory
patients with SMA) and our intention is to further investigate this potential. We also believe that the role of apitegromab as
a muscle-targeted therapy has broad potential beyond SMA, spanning a number of muscle disorders in which fast-twitch
fibers may play an important role in motor function. In some settings, we believe that disease-stabilizing therapy may be
necessary to address the underlying defect, which can then be complemented by the potential motor function-building
benefit of apitegromab. In settings in which the defect may be less severe and/or the disease may have a slower rate of
progression, apitegromab may have the potential to serve as a monotherapy.

Based on this evidence, we believe a wide range of potential therapeutic applications may be envisioned for apitegromab.
We are considering the investigation of apitegromab in multiple indications beyond SMA and have efforts underway to
evaluate these opportunities (including preclinical and translational research, clinical development and regulatory path
assessments, and commercial assessments).

iv.  Cardiometabolic Disorders – SRK-439 (inhibitor of latent myostatin)

1.  The Current State of Obesity and Obesity Treatment

Obesity is now recognized as a top global public health issue, representing a large market with growing numbers: By the
year 2030, it’s estimated that obesity will affect over 1 billion adults and over 250 million children and adolescents. This is
a costly chronic disease, associated with more than $170 billion in excess costs annually in the US given serious

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comorbidities associated with obesity primarily cardiometabolic including cardiovascular disease and type 2 diabetes. The
GLP-1 receptor agonists, and other incretin therapies, have been highly effective in reducing overall weight, but that
weight loss includes a significant amount—an estimated 25-40%—of lean muscle mass loss as well. Importantly, there is
rebound weight gain upon discontinuation of treatment that is primarily fat with lean muscle mass lagging behind. In
addition to the weight gain rebound, patients taking GLP-1 RA therapies have experienced issues with tolerability that
influence the duration of treatment and can lead to high rates of discontinuation for these therapies.

2.  The Role of Muscle and The Opportunity for Myostatin Inhibition

Muscle plays a key role in metabolic functions and energy homeostasis, and given that important role, we believe that
maintaining lean muscle mass is essential for healthy and sustainable weight loss management. The preservation of lean
mass has many benefits for overall health above and beyond maintaining strength, especially in the setting of obesity with
associated co-morbidities. Specifically, muscle is a metabolic organ and increases basal metabolic rate, enhances glucose
uptake, enhances insulin sensitivity, and given the cross talk between adipose tissue and muscle, reduces visceral body fat.
All of these functions are important for healthy weight loss management.

The increasing recognition of the important role of skeletal muscle in modulating metabolic physiology highlights a
potential therapeutic opportunity for myostatin blockade. For example, data emerging from our preclinical experiments
support the hypothesis that blockade of the myostatin pathway has the potential to reduce the mass of visceral fat, a
significant driver of cardiometabolic pathophysiology. Excessive fat mass and metabolic abnormalities have been observed
in many muscle atrophy states, such as SMA and spinal cord injury. More broadly, reducing visceral fat mass, or improving
body compositions (e.g., enhanced muscle-to-fat ratios), may be a potential therapeutic strategy to address a wide range of
disorders, such as non-alcoholic steatohepatitis (“NASH”), diabetes, and obesity.

3.  SRK-439: A Novel Anti-myostatin Antibody for the Treatment of Obesity

In addition to our work to advance apitegromab in SMA, we have leveraged our expertise in anti-myostatin and its effect
on increasing muscle mass to develop myostatin-selective inhibitors for cardiometabolic disorders, including obesity.

SRK-439, a novel anti-myostatin antibody developed by Scholar Rock, has attractive properties that we believe make it
specifically suited for the patient population with obesity. These properties include high in vitro affinity for pro- and latent
myostatin, maintenance of myostatin specificity (i.e., no GDF11 or Activin-A binding), and a developability profile,
including suitability for subcutaneous dosing and a low dosing volume. We believe the selectivity of these antibodies
enables a favorable risk-benefit profile for patients with cardiometabolic disorders.

In addition to these properties, SRK-439 has shown robust preclinical efficacy. In two models of DIO mice, SRK-439
maintained lean mass when combined with a GLP-1 RA therapy, either semaglutide or liraglutide. In both cases, adding
SRK-439 to semaglutide or liraglutide alone demonstrated dose dependent increase and reversal of lean muscle mass loss
with improvement in fat mass loss as well compared to a GLP-1 RA alone (results for SRK-439 used in combination with
semaglutide shown below). These results provide the scientific rationale and support the hypothesis that inhibition of
myostatin in combination with GLP-1 RA-driven weight loss may lead to retention of lean muscle.

We are advancing this preclinical program and plan to submit an IND in mid-2025.

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SRK-439 Reversed Lean Mass Loss and Enhanced Fat Mass Loss Induced by Semaglutide Treatment. Shown in the
plot on the left is the percent change in lean mass from baseline in diet-induced obesity mice as measured by
quantitative nuclear magnetic resonance, and on the right, percent change in fat mass in DIO mice.

4.  Apitegromab in Obesity: Proof-of-Concept

We see potential for apitegromab as a muscle-targeted therapy broadly across disorders in which the role of muscle is
critical for function. Based on evidence of apitegromab’s improvement of muscle function in SMA, and to inform the
development of SRK-439, we plan to initiate a Phase 2 proof-of-concept trial of apitegromab in combination with a GLP-
RA agonist, while at the same time advancing our cardiometabolic program with SRK-439 toward an IND. Phase 1 healthy
volunteer data for apitegromab are summarized in the SMA section above. Data from the clinical trial in subjects with
obesity are expected in mid-2025.

b.

Inhibiting TGFβ – SRK -181 (latent TGFβ – 1 inhibitor) and LTBP

We have been a pioneer in developing a differentiated approach to harnessing the therapeutic potential of the TGFβ
superfamily of growth factors. The foundation of our industry-leading platform is targeting the TGF superfamily of growth
factors with the desired selectivity for both the target (i.e., latent- or pro- form) and disease-specific context. While we are
building our experience from this approach with our anti-myostatin pipeline, we have also observed promising preclinical
and early clinical data that supports targeting other forms of TGFβ, including for oncology and fibrosis.

The TGFβ superfamily plays a central role in a wide range of cellular processes including growth and differentiation,
immune regulation and fibrosis. TGFβ1 is produced by cells as a single protein chain and is then enzymatically processed
by the cells into two distinct and physically separated domains — the mature, active growth factor and the remaining
portion of the original protein, referred to as the prodomain, or latency associated peptide — which remains associated with
and keeps the growth factor in an inactive state. This complex is further associated with one of a number of “presenting
molecules” which when secreted serve to tether the latent precursor in specific locations in the body. TGFβ1 is produced by
a variety of cell types, including fibroblasts, which deposit latent TGFβ1 in connective tissue, as well as regulatory T cells,
cancer cells and macrophages, which display latent TGFβ1 on their cell surfaces.

In a seminal peer-reviewed publication in 2011, by solving a high-resolution x-ray crystal structure of the latent form of
TGFβ1, our founder, Dr. Springer elucidated a new understanding of the mechanism that underlies the activation of latent
precursor forms of members of the TGFβ superfamily of protein growth factors. This research explained at a molecular
level why the secreted form of TGFβ1 is inactive. The prodomain, though physically separated from the mature growth
factor domain, forms a “cage” around the active form of TGFβ1, blocking the ability of the growth factor

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to signal through its receptor. Integrin proteins are able to unlock the “cage” by binding to the prodomain of the latent
TGFβ1 complex and applying force to pull the complex open, allowing the mature growth factor to be released and signal
in its microenvironment. While mature TGFβ1 shares a high degree of structural similarity with its closely related family
members, TGFβ2 and TGFβ3, their respective cages are structurally diverse. By taking advantage of the differences among
the prodomains, together with our understanding of the activation mechanism and ability to recapitulate the activation
mechanism in vitro, we were able to identify multiple highly selective inhibitors of the activation of latent TGFβ1. By
specifically targeting the TGFβ1 isoform, we believe we have the key to unlock the power of checkpoint inhibitors and
meaningfully increase response rates across multiple solid tumor types. In March 2019, we selected SRK-181 as a product
candidate in our TGFβ1 cancer immunotherapy program based on the strength of preclinical data and human translational
insights. In vitro and in vivo studies of SRK-181 showed that it binds to latent TGFβ1 with high affinity and high
selectivity, which is evidenced by minimal or no binding to latent TGFβ2 or latent TGFβ3 isoforms. Integrins, such as
αVβ6 and αVβ8, can trigger the activation of TGFβ1 and TGFβ3. In addition, biochemical evidence suggests that certain
proteases (e.g., Plasmin and Kallikreins) may also induce TGFβ activation. Notably, these integrins and proteases have
been implicated in tumor biology in a number of human cancers. SRK-181 is capable of inhibiting both integrin-
dependent- and protease-induced activation of TGFβ1.

SRK-181 selectively binds to proTGFβ1complexes with minimal or no binding to proTGFβ2 or proTGFβ3 complexes.

i.  TGFβ1 in Cancer Therapy

We believe that specific inhibition of TGFβ1 may have a significant impact on the treatment of patients in certain oncology
settings.

Immune checkpoints are cellular mechanisms that act as a brake on the immune system, and expression of these proteins in
the tumor microenvironment creates an immunosuppressive environment that allows tumor cells to evade being killed by
the immune system. Immune checkpoint proteins, such as PD-1/PD-L1, have therefore become key therapeutic targets in
the tumor microenvironment. By inhibiting these proteins, the brakes on the immune system are released, allowing the T
cells to kill the cancer cells. There are currently multiple approved checkpoint inhibitor therapies that target the PD-1/PD-
L1 pathway.

A significant proportion of patients, in many cases the majority, fail to respond to these checkpoint inhibitor therapies,
because they have what appears to be a pre-existing, or primary, resistance to immunotherapy. Other patients’ cancers
appear to initially respond but subsequently progress. In many human cancers, TGFβ signaling is associated with lack of
response to PD(L)-1 blockade, particularly in patients with tumors harboring an immune excluded phenotype (i.e., CD8+ T
cells present in nearby stroma but excluded from the tumor parenchyma). Gene expression analysis of pre-treatment

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melanoma tumors identified multiple TGFβ-related signaling signatures associated with pre-existing or primary resistance
to anti-PD-(L)1 antibody therapy. Similarly, it has also been reported that retrospective pathway analysis of tumor samples
from an atezolizumab bladder cancer trial identified the TGFβ pathway as a major determinant of primary resistance to
atezolizumab.

Our analysis of publicly available human tumor data has identified TGFβ1 as the predominant TGFβ isoform expressed in
many solid tumors.

National Cancer Institute - Cancer Genome Atlas Program RNAseq analysis of >10,000 samples spanning 33 tumor
types show high expression of the TGFβ1 isoform in many tumor types

ii.  SRK-181 in Cancer Immunotherapy - Inhibitor of Latent TGFβ1 Activation

Our second product candidate, SRK-181, a highly selective inhibitor of the activation of latent TGFβ1, is in clinical
development for the treatment of locally advanced or metastatic solid tumors that are resistant to anti-PD-(L)1 therapies.
We estimate at least 750,000 cancer patients in the U.S. are eligible for treatment with checkpoint inhibitor therapies every
year, of which the majority of patients will develop progression to the treatment.

Increased signaling by TGFβ1 is a key driver of a number of disease-relevant processes, including immune system evasion
by cancer cells, bone marrow fibrosis associated with hematological disorders, and tissue and organ fibrosis. Historically,
selectively targeting TGFβ1 signaling has been challenging due to the inability of either small molecule inhibitors or
antibodies to avoid off-target inhibition of other, closely related growth factors, TGFβ2 and TGFβ3. Treatment of animals
with these non-selective TGFβ inhibitors has been associated with a range of toxicities, most notably cardiac toxicity.
Furthermore, since each of these growth factors signals through the same TGFβ receptor, ALK5, inhibitors of the TGFβ
receptor kinase suffer from similar dose-limiting toxicities. In preclinical studies of our antibodies, we have observed
selective inhibition of TGFβ1 activation in vitro and immunomodulatory and antifibrotic activity in multiple disease
models in vivo. A 28-day pilot nonclinical toxicology study in rats of our leading antibody did not observe any drug-related
toxicity up to the highest dose (100 mg/kg weekly) tested in the study. In the same study, we tested non-selective TGFβ
inhibitors and observed the published toxicities, including cardiac toxicity as well as death. We have also completed four-
week GLP toxicology studies in rats and non-human primates and no SRK-181 related adverse effects were observed up to
the highest evaluated dose of 200 mg/kg per week and 300 mg/kg per week, respectively.

In many human cancers, TGFβ signaling is associated with lack of response to PD-(L)1 blockade, particularly in patients
with tumors harboring an immune excluded phenotype (i.e., CD8+ T cells present in nearby stroma but excluded from the
tumor parenchyma). We have observed multiple mouse models that recapitulate the immune-excluded phenotype and are
resistant to PD-1 blockade become responsive to the combination of SRK-181-mIgG1, the murine analog of SRK-181, and
an anti- PD-1 antibody. These models, including the MBT-2 bladder cancer model, the Cloudman S91 melanoma model
and the EMT6 breast cancer model, were poorly responsive or unresponsive to single agent treatment

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with either anti-PD-1 or SRK-181-mIgG1, with little or no effect on tumor growth. However, in representative
experiments, the combination of SRK-181-mIgG1 and anti-PD-1 resulted in tumor regressions of 72%, 57% and 70% in
these three mouse models, respectively. Furthermore, the combination treatment led to statistically significant survival
benefit in all three models (See “Preclinical Evidence in Overcoming Resistance to Checkpoint Inhibition”).

Our Phase 1 DRAGON clinical trial is intended to initially evaluate our therapeutic hypothesis that SRK-181 in
combination with anti-PD-(L)1 therapy may overcome resistance to anti-PD-(L)1 therapy and lead to anti-tumor responses.
This clinical trial in patients with locally advanced or metastatic solid tumors is ongoing and investigates the safety, PK and
efficacy of SRK-181. The DRAGON trial consists of two parts: Part A (dose escalation of SRK-181 as a single-agent or in
combination with an approved anti-PD-(L)1 therapy) and Part B (dose expansion evaluating SRK-181 in combination with
an approved anti-PD-(L)1 antibody therapy). Part B encompasses five active cohorts, including urothelial carcinoma,
cutaneous melanoma, non-small cell lung cancer, clear cell renal cell carcinoma and head and neck squamous cell
carcinoma, and commenced in 2021 and completed enrollment in December 2023. Safety, efficacy and biomarker data
were presented in November 2023 at the SITC 38th Annual Meeting. Data presented continues to support proof-of-concept
for SRK-181 in 28 heavily pretreated patients with ccRCC resistant to anti-PD-1. SRK-181 was generally well tolerated
and showed promising anti-tumor activity in this patient population. Of 28 evaluable patients in the ccRCC cohort, six
patients treated with SRK-181 in combination with pembrolizumab had confirmed partial responses (“PRs”) and achieved
a best tumor reduction of 33% to 93%, with an objective response rate of 21.4%. In the biomarker analysis for ccRCC,
levels of circulating granulocytic myeloid-derived suppressor cells (“gMDSC”) correlated with clinical activity in ccRCC
patients treated with SRK-181 in combination with pembrolizumab. Safety data from ccRCC cohort continue to show
SRK-181 is generally well tolerated. The data cutoff for all analyses was August 29, 2023.

We believe that the DRAGON trial achieved its study objectives by showing objective, durable clinical responses in
patients with ccRCC resistant to PD-1 therapy beyond what is expected from continuing PD-1 alone. It is anticipated that
emerging data from the DRAGON trial will be presented at medical meetings in the future.

1.  Potential Applications of SRK-181 in Additional Oncology Settings

In addition to cancer immunotherapy, we believe SRK-181 has the potential for use in other oncology settings, such as in
immunotherapy-naïve patients, in combination with other therapies beyond checkpoint inhibitors and in myelofibrosis.

iii.  Fibrosis: LTBP-49247

Fibrosis is a pathological feature of many diseases and can occur in virtually all organs. It is characterized by excessive
accumulation of extracellular matrix in the affected tissue and accounts for substantial morbidity and mortality. TGFβ
signaling pathway is a well-established central driver in the pathogenesis of fibrotic diseases and inhibition of this pathway
has been shown to improve outcomes in relevant animal models of hepatic, renal, pulmonary, and other fibrotic diseases. In
addition, a non-selective inhibitor of TGFβ signaling that inhibits all 3 isoforms (isoform 1, 2, and 3) of TGFβ showed
clinical improvement in patients with systemic sclerosis, a fibrotic connective tissue disease. However, non-selective
inhibition of all TGFβ isoforms is known to be associated with serious safety findings, most notably bleeding episodes, and
cardiac toxicities. Based on knock out animal models (a model where researchers have inactivated, or "knocked out," an
existing gene by replacing it or disrupting it with an artificial piece of DNA), these safety findings are believed to be
associated with inhibition of the TGFβ2, and TGFβ3 isoforms. These data suggest that novel approaches to targeting TGFβ
signaling may have broad applicability to the treatment of fibrotic disease, where more selective approaches may offer an
improved safety profile. In addition, given that immune cell activation may play a key role in fibrotic disease development,
selective targeting of only matrix associated TGFβ1, at the primary site of fibrosis manifestation, while avoiding immune
cell associated TGFβ1 is key to maintaining efficacy while avoiding potential long-term liabilities of immune cell
activation.

Based on this scientific rationale, we utilized our platform to discover and develop antibodies that selectively inhibit the
activation of latent TGFβ1 in the context of fibrotic extracellular matrix and that avoid perturbing TGFβ1 presented by
cells of the immune system. We selected a highly potent, anti-latent TGFβ1 antibody that selectively inhibits TGFβ1
activation within the extracellular matrix by targeting latent TGFβ1 associated with latent TGFβ-binding proteins

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(LTBPs), thus enabling specific inhibition of TGFβ1 in fibrotic tissue. This antibody demonstrated significant antifibrotic
activity in a variety of preclinical rodent models. It also demonstrated robust therapeutic index at all doses tested in a non-
GLP mouse safety study. We plan to advance this program to IND-enabling studies.

When latent TGFβ1 is secreted from cells (top center), it is further associated with another protein, referred to as a
presenting molecule (examples of which are shown in each image). The presenting molecules are covalently bound to
the prodomain and serve to tether the latent TGFβ1 complex in a particular microenvironment. Unlike TGFβ1, a given
presenting molecule's expression pattern is restricted to particular cellular and tissue environments. For example, the
presenting molecule GARP (right) is found primarily on regulatory T cells, the presenting molecules LTBP1 and
LTBP3 (bottom center) are localized to the connective tissue in the extracellular matrix, and the presenting molecule
LRRC33 (left) is found primarily on certain myeloid lineage cells such as macrophages.

c. HJV-35202: A High-Affinity Antibody Demonstrating Selective Inhibition of HJV/RGMc

A number of disease states as well as rare genetic mutations can cause disruptions in iron homeostasis and can result in
either iron deficiency or overload. These imbalances in iron levels can lead to detrimental complications and are the basis
of mortalities and morbidities in many diseases. Hepcidin is a peptide hormone that is produced in the liver and plays a
major role in regulating systemic iron homeostasis. Aberrantly increased hepcidin expression is a hallmark of several
chronic and devastating diseases where it causes iron-restricted anemia, contributing to the morbidity and mortality of
these diseases. Hepcidin expression is controlled via the bone morphogenetic protein (BMP) signaling pathway, with
BMP2/6 being the predominant ligands signaling through a large protein receptor complex containing BMP receptors
(BMPR) and a BMP co-receptor, repulsive guidance molecule c/ hemojuvelin (RGMc/HJV). The RGM family consists of
three members, RGMa, RGMb and RGMc/HJV, and owing to their role as BMP co-receptors, has been shown to be
involved in the development and maintenance of many tissues and organs throughout the body. Human

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mutations as well as knockout animal studies have demonstrated the predominant role of RGMc/HJV to be in the
regulation of iron homeostasis. These data suggest that novel approaches to specifically target the BMP pathway in the
liver may have a broad applicability to the treatment of anemia, especially in chronic diseases where hepcidin is
upregulated.

In contrast to the far-reaching roles of BMP-BMPRs throughout the body, the specific role of RGMc/HJV isoform in iron
homeostasis, provided an opportunity to utilize our platform to discover and develop antibodies that selectively bind to and
inhibit RGMc. We selected HJV-35202, a highly potent and selective RGMc/HJV inhibitor that has demonstrated
significant suppression of hepcidin expression and resultant mobilization of stored iron in vivo in mice, rats, and non-
human primates. HJV-35202 may provide a novel approach to treating iron-restricted anemia in patients with chronic
diseases driven by hepcidin overexpression. We plan to advance this program to IND-enabling studies.

d.  Additional Potential Areas of Exploration

Additional therapeutic areas and targets in which we could potentially apply our scientific platform and expertise include:

● Exploring opportunities to develop other context dependent inhibitors of TGFβ1 to modulate immune cell

activation within the context of specific immune diseases.

● Exploring opportunities in modulating metabolic physiology including understanding the important role of

skeletal muscle in modulating metabolism. This is highlighted by potential therapeutic opportunity for myostatin
blockade. For example, evidence is emerging that blockade of the myostatin pathway can reduce the mass of
visceral fat, a significant driver of cardiometabolic pathophysiology. We have efforts underway to evaluate these
opportunities, including preclinical and translational research, development path assessments, and commercial
evaluations.

We continue to enhance our internal biologics discovery capabilities including the use of humanized transgenic rodents as
well as single-domain antibody libraries. These new capabilities allow us to more efficiently discover antibodies and
furthers our commitment to building a differentiated portfolio of product candidates.

VII.

 License Agreements

a.  Gilead Collaboration 

On December 19, 2018 (the “Effective Date”), we entered into a three-year collaboration with Gilead to discover and
develop therapeutics that target TGFβ-driven signaling, a central regulator of fibrosis (“the Collaboration Agreement”). In
connection with the Collaboration Agreement, we received an upfront payment of $50 million and an equity investment of
$30 million.

In December 2019, we achieved a $25 million preclinical milestone under the Gilead Collaboration Agreement for the
successful demonstration of efficacy in preclinical in vivo proof-of-concept studies.

On January 6, 2022, we entered into a letter agreement with Gilead which (i) confirmed that the collaboration period under
the Collaboration Agreement had expired as of December 19, 2021, and (ii) agreed the option exercise period for all
programs under the Collaboration Agreement had been terminated as of January 6, 2022.

b.  Adimab Agreement

On March 12, 2019, we entered into an amended and restated collaboration agreement (“Adimab Agreement”) with
Adimab, LLC (“Adimab”). Under the Adimab Agreement, as amended, we selected a number of biological targets against
which Adimab used its proprietary platform technology to discover and/or optimize antibodies based upon mutually agreed
upon research plans, and we have the ability to select a specified number of additional biological targets

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against which Adimab will provide additional antibody discovery and optimization services. During the research term and
evaluation term for a given research program with Adimab (“Research Program”), we have a non-exclusive worldwide
license under Adimab’s technology to perform certain research activities and to evaluate the program antibodies to
determine whether we want to exercise our option to obtain an exclusive license to exploit such antibodies (a
“Development and Commercialization Option”).

Pursuant to the Adimab Agreement, we previously paid Adimab a one-time, non-creditable, non-refundable technology
access fee. We are also obligated to make certain technical milestone payments to Adimab on a Research Program-by-
Research Program basis. Upon exercise of a Development and Commercialization Option, we are obligated to pay to
Adimab a non-creditable, nonrefundable option exercise fee of either (i) a low seven-digit dollar amount or (ii) a mid- six-
digit dollar amount, based on the antibodies in the given Research Program, plus, in either case, an amount equal to any
technical milestone payment which was not previously paid with respect to such Research Program and less, in either case,
any option extension fees paid with respect to such Research Program. On a Product (as defined in the Adimab
Agreement)-by-Product basis, we will pay Adimab upon the achievement of various clinical and regulatory milestone
events with total milestone payments not to exceed mid-teen millions in the aggregate for a given Product. For any Product
that is commercialized, on a country-by-country and Product-by-Product basis, we are obligated to pay to Adimab a low-
to-mid single-digit percentage of annual worldwide net sales of such Product during the applicable royalty period in each
country.

SRK-181 is subject to the terms of the Adimab Agreement, and in March 2019, we exercised our Development and
Commercialization Option for the Research Program from which SRK-181 was generated. In January 2020 and December
2020, we exercised our Development and Commercialization Option for additional Research Programs.

VIII.

 Intellectual Property 

Our commercial success depends in part on our ability to protect intellectual property for our product candidates, including
apitegromab and SRK-181, and related methods, as well as our novel approach and proprietary platform for generating
monoclonal antibodies; to secure freedom-to-operate to enable commercialization of our product candidates, if approved;
and to prevent others from infringing upon our patent rights. Our policy is to seek to protect our intellectual property
position by filing patent applications in key jurisdictions, including the U.S., Europe, Canada, Japan and Australia,
covering our proprietary technology, inventions and improvements that are important to innovate, develop, sustain and
implement our business.

We file patent applications directed to compositions comprising our antibodies, classes of antibodies covering our product
candidates, use of such antibodies for treating diseases, as well as related manufacturing methods. As of December 31,
2023, we have 30 pending patent families across multiple programs. Among the pending families, 22 have been
nationalized, from which 20 applications have matured into U.S. issued patents with additional issued patents in multiple
jurisdictions globally. Collectively, there are 242 national or direct utility applications pending or issued. In addition, there
are four patent family filings which are in the priority year. We continue to review and harvest new inventions for new
patent filings.

As of December 31, 2023, two granted patents, EP2981822 and EP3368069, are the subject of ongoing opposition
proceedings before the European Patent Office (“EPO”). We have no other contested proceedings relating to any patents as
of that date, but we cannot provide any assurances that we will not have such proceedings at a later date. For more
information regarding the risks related to our intellectual property, please see “Risk factors—Risks Related to Our
Intellectual Property.”

a.  Platform

Our novel approach to generating selective modulators of supracellular activation of growth factors is broadly embodied in
our two earliest “platform” patent families, PCT/US2013/068613 (published as WO 2014/074532) and
PCT/US2014/036933 (published as WO 2014/182676). These patent families are directed to methods for modulating the
activation of the TGFβ superfamily of growth factors and methods for screening for a monoclonal antibody that

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specifically targets an inactive form of the growth factor, thereby preventing activation (e.g., release) of mature growth
factor. The TGFβ superfamily is a group of more than 30 related growth factors/cytokines that mediate diverse biological
processes and includes TGFβ1 and myostatin (also known as GDF-8). Issued U.S. patents in the platform families include:
U.S. Patents Nos. 9,573,995 (issued 02/21/2017); 9,758,576 (issued 09/12/2017); 9,580,500 (issued 02/28/2017);
9,399,676 (issued 07/26/2016); 9,758,577 (issued 09/12/2017); 10,597,443 (issued 03/24/2020); 10,981,981 (issued
04/20/2021); and 11,827,698 (issued 11/28/2023). There is also a granted European (“EP”) platform patent: EP2981822
(granted on 09/02/2020), which was validated in 37 states. These U.S. and EP patents are projected to expire in 2034.

Specifically, EP2981822 has granted composition of matter claims directed to an antibody capable of binding a
recombinant antigen comprising pro-TGFβ1 or a growth factor-prodomain complex which comprises the TGFβ1 LAP
complex, in addition to claims directed to methods of making such antibodies. EP2981822 is currently the subject of
ongoing opposition proceedings before the EPO.

U.S. Patent No. 9,573,995 has issued composition of matter claims directed to an antibody that specifically binds to GARP
associated with a human TGFβ1 LAP complex.

U.S. Patent No. 9,758,576 has issued composition of matter claims directed to an isolated monoclonal antibody, or a
fragment thereof, that specifically binds the prodomain of a pro/latent GDF-8/myostatin complex, thereby preventing
proteolytic cleavage between residues Arg 75 and Asp 76 of GDF-8/myostatin prodomain, so as to inhibit the release of
mature GDF-8/myostatin growth factor from the complex.

U.S. Patent No. 9,580,500 has issued claims directed to phage display library-based antibody production methods for
identifying an antibody that binds a GARP/proTGFβ1 complex.

U.S. Patent No. 9,399,676 has issued claims directed to phage display library-based antibody production methods for
identifying an antibody that binds a pro/latent GDF-8 complex that has been subjected to enzymatic cleavage. Related
product-by-process claims are included in issued U.S. Patent No. 9,758,577.

U.S. Patent No. 10,597,443 has issued claims that broadly cover manufacturing methods for a pharmaceutical composition
containing an antibody that binds a large latent complex of TGFβ, thereby modulating TGFβ signaling.

U.S. Patent No. 10,981,981 has issued claims that broadly cover manufacturing methods for a pharmaceutical composition
containing an antibody that binds pro/latent GDF-8, but does not bind to mature GDF-8, and inhibits GDF-8 signaling.

In addition, U.S. Patent No. 11,827,698 has issued claims that broadly cover manufacturing methods for a pharmaceutical
composition containing an antibody that binds pro/latent GDF-8, and inhibits release of mature GDF8 from the pro/latent
GDF8 complex.

b.  Myostatin Activation Inhibitors

Eleven patent families have been filed to date to cover proprietary myostatin inhibitors and their use in the treatment of
various muscle and metabolic diseases. Patent prosecution of these pending patent families is ongoing but relatively early.

Two families are directed to composition of matter claims that cover our proprietary antibodies. PCT/US2015/059468
(published as WO 2016/073853) broadly covers a class of monoclonal antibodies that specifically bind inactive precursors
thereby preventing activation of myostatin. This patent family is projected to expire in November 2035. U.S. Patents
10,307,480 and 11,135,291 issued in June 2019 and October 2021, respectively, with issued claims directed to Scholar
Rock proprietary antibodies that specifically bind pro/latent myostatin, including 29H4, the parental clone of apitegromab,
and variants, as well as methods of making antibodies with pH sensitive binding to pro/latent myostatin. A

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second family, PCT/US2016/052014 (published as WO 2017/049011), discloses the specific amino acid sequence of
apitegromab and is projected to expire in September 2036. U.S. Patent 10,751,413 issued in August 2020, with claims
directed to antibodies and pharmaceutical compositions comprising the heavy and light chain sequences of apitegromab,
while U.S. Patent 11,439,704 issued in September 2022, with claims directed to a method of preventing muscle loss and/or
reducing muscle atrophy or treating SMA by administering an antibody having the heavy and light chain sequences of
apitegromab. The European counterpart also granted as EP 3350220 B1 in May 2021. The granted claims relate to
antibodies comprising the heavy and light chain variable region sequences of apitegromab, and pharmaceutical
compositions of the antibodies.

The following patent families are directed to therapeutic uses/methods:

PCT/US2017/012606 (published as WO 2017/120523) broadly covers treatment methods for a number of muscle and
neuromuscular disease and disorders using an antibody that specifically blocks the activation step of myostatin. The first
U.S. application issued in May 2019 as U.S. Patent 10,287,345 and is projected to expire in September 2036. The issued
claims are drawn to methods for inhibiting myostatin activation using our proprietary activation inhibitors (such as
apitegromab) to cause specified pharmacological effects to treat a variety of conditions including, muscle and metabolic
disorders. A second U.S. application issued as U.S. Patent 10,882,904 in January 2021. The issued claims recite methods
for inhibiting myostatin activation using an antibody comprising the heavy and light chain sequences of apitegromab for
various indications.

PCT/US2017/037332 (published as WO 2017/218592) is directed to methods for treating neuromuscular diseases and
selecting patient populations that are likely to respond to myostatin inhibition. This filing includes the treatment of SMA in
patients who are on SMN therapies (e.g., SMN correctors/upregulators). This patent family is projected to expire in June
2037. The PCT application was nationalized in 11 jurisdictions, and applications in the three key jurisdictions (i.e., U.S.,
Europe and Japan) have granted, as well as in other countries. Specifically, the U.S. application granted in March of 2021.
The granted claims are directed to add-on or combination therapy for treating spinal muscular atrophy with a myostatin
inhibitor and a neuronal corrector (such as smn upregulator therapy). Similar claims have also granted in other countries
including Japan (JP Patent No. 6823167, JP Patent No. 7161554, and JP Patent No. 7,344,337). Likewise, the European
counterpart granted as EP 3368069B1, and has been validated in 37 states. The granted European claims are directed to
add-on therapy and combination therapy for the treatment of SMA using a myostatin-selective inhibitor, in conjunction
with an SMN corrector therapy. EP 3368069B1 is currently the subject of ongoing opposition proceedings before the EPO.

PCT/US2018/012686 (published as WO 2018/129395) relates to the treatment of metabolic diseases with a myostatin 
activation inhibitor and is projected to expire in January 2038. The PCT was nationalized in 2019 and is in the early stages 
of prosecution. A U.S. patent issued in October of 2021 as U.S. 11,155,611, with claims directed to methods of making a 
pharmaceutical composition comprising a myostatin-selective inhibitor, comprising screening for an antibody that is 
capable of decreasing expression of pyruvate dehydrogenase kinase 4 (PDK4) and increasing expression of pyruvate 
dehydrogenase phosphatase 1 (PDP1). A Japanese patent (JP 7198757) issued in December 2022 with claims directed to a 
pro/latent myostatin-specific inhibitor for use in treating or preventing obesity or metabolic disorder in a subject on a 
calorie restriction diet.  Similar claims have issued in Europe in 2023 (EP 3565592).

In addition to the five pending patent families listed above, there is also a recently-filed PCT application
PCT/US2021/056517 (published as WO2022/093724) directed to inventions deriving from the phase 2 clinical trial of
apitegromab. If granted, patents deriving from this PCT would expire in 2041. Another PCT application was filed in 2023,
PCT/US2023/020843 (published as WO 2023/215384) with claims directed to therapeutic methods for treating SMA. If
granted, patents from this family would expire in 2043. A further PCT application PCT/US2022/034588 (published as
WO2022/2271867) was filed with claims directed to a myostatin pathway inhibitor for use in treating metabolic disorders.
If granted, patents deriving from this PCT would expire in 2042. Moreover, issued claims of U.S. Patent 9,758,576 from
the platform patents discussed in detail above cover monoclonal antibodies that selectively inhibit myostatin signaling by
blocking the proteolytic activation of latent myostatin. These issued composition of matter claims provide protection for
our first antibody apitegromab, as well as any other monoclonal antibodies that work by this unique mechanism of action.
This patent expires in May 2034, not including any potential patent term extension.

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Finally, two other myostatin-related patent families have been filed and are in the priority year.

c.  TGFβ1 Activation Inhibitors

In addition to the patent families discussed above in the “Intellectual Property-Platform” section that generically cover
certain aspects of the TGFβ1 program, fifteen patent families have been filed to date, covering various specific aspects of
our TGFβ1 programs.

Isoform-specific inhibitors of TGFβ1 which confer improved safety profile and related methods are described in
PCT/US2017/021972 (published as WO 2017/156500). A US patent (11,643,459) issued in May 2023, with claims
directed to methods for identifying TGFβ1-specific inhibitors. A European patent granted in May of 2023 as EP3365368,
with claims to the use of isoform-selective and context-independent anti-TGFβ1 antibodies, defined by CDR sequences or
by cross-competition, in the treatment of cancer or myelofibrosis. This family is projected to expire in March 2037.

Among TGFβ1 inhibitors, one of our context-independent antibodies is separately claimed and related preclinical data are
described in PCT/US2018/012601 (published as WO 2018/129329). This patent application is projected to expire in
January 2038. For this latter family, a Japanese patent (JP Patent No. 7157744) issued in October 2022 with claims
covering certain isoform-selective, context-independent antibodies and their use in the treatment of fibrotic diseases.

In addition, high-affinity, isoform-selective TGFβ1 inhibitors are disclosed in PCT/2019/041373 (published as WO
US2020/014460). Patents of this family are projected to expire in 2039. Separately, three direct national/regional
applications covering related subject matter have been filed, in the U.S., Europe and Hong Kong, and are projected to
expire in 2039. A U.S. patent issued in September of 2021 as U.S. 11,130,803, with claims which cover the SRK-181
clinical candidate and pharmaceutical compositions thereof; and a European patent issued in November of 2021 as
EP3677278, with claims that cover the SRK-181 clinical candidate, pharmaceutical compositions, use for treating cancer
and myelofibrosis, and methods for manufacturing. Additionally, PCT/US2021/012969 (published as WO 2021/142448)
discloses data related to biomarkers for the high-affinity, isoform-selective TGFβ1 inhibitors and, if granted, patents
deriving from this PCT application are projected to expire in 2041. Additional biomarkers are disclosed in
PCT/US2022/022063 (published as WO2022/204581) and PCT/US2022/032278 (published as WO2022256723). If
granted, patents deriving from these PCT applications would expire in 2042. Antibodies claimed in these patent families
protect our SRK-181 clinical candidate.

Separately, other improved isoform-selective, context-independent inhibitors of TGFβ1 are disclosed in
PCT/US2019/041390 (published as WO 2020/014473). This family is projected to expire in 2039. PCT/US2021/12930
(published as WO 2021/142427) is directed to optimized isoform-selective, context-independent inhibitors of TGFβ1. This
family is projected to expire in 2041.

LTBP complex-specific inhibitors of TGFβ1 are described in four patent families: PCT/US2018/44216 (published as WO
2019/023661) which is expected to expire in July of 2038; and PCT/US2020/15915 (published as WO2020/160291), which
is expected to expire in 2040; PCT/US2022/73740 (published as WO 2023/288277), which is expected to expire in 2042;
and a fourth patent family which is in the priority year. Two U.S. patents (U.S. Pat. Nos. 11,214,614 and 11,365,245) have
been issued in the second patent family with claims directed to antibodies and pharmaceutical compositions.

LRRC33-specific inhibitors are described in a further patent family: PCT/US2018/031759 (published as WO 2018/208888)
which is expected to expire in May of 2038. EP3621694 granted in July 2023, with claims directed to therapeutic use of
LRRC33 inhibitors for the treatment of various indications. PCT/US2017/042162 (published as WO 2018/013939) was
exclusively licensed to Janssen but, as explained below, the license agreement was terminated in July 2022. Scholar Rock
is now in control of prosecution. This patent family covers antibodies that specifically inhibit GARP-associated TGFβ, and
is projected to expire in July 2037. A Japanese patent (JP Patent No. 7128801) issued in

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August 2022 with claims directed to antibodies and antigen-binding fragments which specifically bind human pro-TGFβ1
complex, a process for their production and related compositions.

d.  RGMc-Selective Inhibitors

PCT/US2019/57687 (published as WO2020/86736) is directed to RGMc-selective inhibitors and will expire in 2039. A
second family has been filed and is in the priority year, which is projected to be converted to international patent
application (PCT) in November of 2024.

e.  Intellectual Property Protection

We cannot predict whether the patent applications we pursue will issue as patents in any particular jurisdiction or whether
the claims of any issued patents will provide any proprietary protection from competitors. Even if our pending patent
applications are granted as issued patents, those patents, as well as any patents we license from third parties, may be
challenged, circumvented or invalidated by third parties. As mentioned above, two granted patents, EP2981822 and
EP3368069, are the subject of ongoing opposition proceedings before the EPO, as of December 31, 2023. While there are
no contested proceedings or third-party claims relating to any of the other patents described above, as of that date, we
cannot provide any assurances that we will not have such proceedings or third-party claims at a later date.

The term of individual patents depends upon the legal term of the patents in the countries in which they are obtained. In
most countries in which we file, the patent term is 20 years from the earliest date of filing a non-provisional patent
application. In the U.S., the patent term of a patent that covers an FDA-approved drug or biologic may also be eligible for
patent term extension, which permits patent term restoration as compensation for the patent term lost during FDA
regulatory review process. The Hatch-Waxman Amendments permit a patent term extension of up to five years beyond the
expiration of the patent. The length of the patent term extension is related to the length of time the drug or biologic is under
regulatory review. Patent term extension cannot extend the remaining term of a patent beyond a total of 14 years from the
date of product approval and only one patent applicable to an approved drug or biologic may be extended. Similar
provisions are available in Europe and other foreign jurisdictions to extend the term of a patent that covers an approved
drug or biologic or provide an additional period of protection for the approved pharmaceutical product following expiry of
the patent. In the future, if our products receive FDA approval, we expect to apply for patent term extensions on patents
covering those products. We plan to seek patent term extensions to any of our issued patents in any jurisdiction where these
are available, however there is no guarantee that the applicable authorities, including the U.S. Patent and Trademark Office
in the U.S. and the national patent offices in Europe, will agree with our assessment of whether such extensions should be
granted, and if granted, the length of such extensions.

In addition to our reliance on patent protection for our inventions, product candidates and research programs, we also rely
on trade secret protection for our confidential and proprietary information. For example, certain elements of our proprietary
platform may be based on unpatented trade secrets that are not publicly disclosed. Although we take steps to protect our
proprietary information and trade secrets, including through contractual means with our employees and consultants, third
parties may independently develop substantially equivalent proprietary information and techniques or otherwise gain
access to our trade secrets or disclose our technology. Thus, we may not be able to meaningfully protect our trade secrets. It
is our policy to require our employees, consultants, outside scientific collaborators, sponsored researchers and other
advisors to execute confidentiality agreements upon the commencement of employment or consulting relationships with us.
These agreements provide that all confidential information concerning our business or financial affairs developed or made
known to the individual or entity during the course of the party's relationship with us is to be kept confidential and not
disclosed to third parties except in specific circumstances. In the case of employees, the agreements provide that all
inventions conceived by the individual, and which are related to our current or planned business or research and
development or made during normal working hours, on our premises or using our equipment or proprietary information,
are our exclusive property. In addition, we take other appropriate precautions, such as physical and technological security
measures, to guard against misappropriation of our proprietary technology by third parties. We have also adopted policies
and conduct training that provides guidance on our expectations, and our advice for best practices, in protecting our trade
secrets.

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IX. Manufacturing

We do not own or operate facilities for clinical drug manufacturing, storage, distribution or quality testing. Currently, all of
our clinical manufacturing is outsourced to third-party manufacturers. Certain third party manufacturers may require us to
enter in manufacturing agreements with them that include substantial milestone payments and royalties. As our
development programs expand and we build new process efficiencies, we expect to continually evaluate our strategy of
utilizing third party manufacturers with the objective of satisfying demand for our registration trials and, if approved, the
manufacture, sale and distribution of commercial products.

X. Antibody Discovery

We have internal antibody display and discovery capabilities, however at times we may continue to rely on third parties to
conduct antibody discovery and optimization services for us based on criteria and specifications provided by us. Certain
antibody discovery and optimization vendors require us to enter into a license with them for the right to use antibodies
discovered by them in humans or for commercial purposes. Such license could include substantial milestone payments and
royalties to the extent we choose to use an antibody discovered by such vendor. On March 12, 2019, we exercised an
option to receive such a license from Adimab pursuant to our Adimab Agreement. Please see the description above in
“License Agreements – Adimab Agreement” for more details on the terms of this agreement.

XI.  Competition

The biotechnology and pharmaceutical industries are characterized by rapid evolution of technologies, fierce competition,
and strong defense of intellectual property. Although we believe that our product candidates, discovery programs,
technology, knowledge, experience and scientific resources provide us with competitive advantages, we face competition
from major pharmaceutical and biotechnology companies, academic institutions, governmental agencies and public and
private research institutions, among others.

Many of the companies against which we may compete have significantly greater financial resources and expertise than we
do in research and development, manufacturing, and commercialization of approved products. These competitors compete
with us in recruiting and retaining qualified scientific and management personnel and may compete with us in establishing
clinical trial sites and patient recruitment for clinical trials.

The availability of reimbursement from government and other third-party payors will also significantly affect the pricing
and competitiveness of our products. Our competitors also may obtain FDA or other regulatory approval for their products
more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market
position before we are able to enter the market.

a.  Competition for Apitegromab

In the SMA market, there are three approved SMN therapies and no approved muscle-targeted treatments for SMA to date.
The SMA drug development pipeline reflects an evolution of the treatment paradigm in SMA and a focus on the unmet
needs of individuals living with SMA after receiving treatment with an approved SMN therapy. To address the muscle
weakness and quality of life impact in SMA, we are pioneering a novel approach by developing a muscle-targeted therapy.

We are developing apitegromab, an investigational fully human monoclonal antibody designed to inhibit myostatin
activation by selectively binding the pro- and latent forms of myostatin in the skeletal muscle, for the treatment of patients
with SMA. If apitegromab receives marketing approval, we may face competition from other companies conducting
clinical trials to develop anti-myostatin molecules or other muscle-targeted therapies for SMA, including Roche, Biohaven
Ltd, Biogen, and NMD Pharma. Moreover, we may also compete with smaller or earlier-stage companies, and other
research institutions that have developed, are developing or may be developing current and future anti-myostatin inhibitors
or other muscle-targeted therapies for SMA.

In addition, Novartis, Roche and Biogen are developing alternate formulations of their approved SMN therapies, including
Novartis for its gene therapy, onasemnogene abeparvovec, Roche for risdiplam, and Biogen for its antisense

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oligonucleotide (ASO), nusinersen. We do not believe that these therapies are competitive with apitegromab because
apitegromab addresses a different aspect of the disease pathology, and that apitegromab is anticipated to be used in patients
receiving SMN therapies.

b.  Competition for SRK-181

Our competitors for SRK-181 may include other companies developing cancer immunotherapies to be used in combination
with CPI therapy.

Many companies, including AbbVie Inc, Roche, Bicara Therapeutics, Novartis, Bristol Myers Squibb (acquired Forbius)
and Merck KGaA, Merck (acquired Tilos Therapeutics) are developing therapies for cancer immunotherapy in combination
with CPI therapy, that are intended to work, at least in part, through inhibition of the TGFβ signaling pathway.

Our competitors may also include companies that are or will be developing therapies for the same therapeutic areas that we
are targeting within our early pipeline, including other neuromuscular disorders, cancer, fibrosis and iron-restricted anemia.

XII.  Government Regulation

Government authorities in the U.S. at the federal, state and local level and in other countries regulate, among other things,
the research, development, testing, manufacture, quality control, approval, labeling, packaging, storage, record-keeping,
promotion, advertising, distribution, post-approval monitoring and reporting, marketing and export and import of drug and
biological products, such as apitegromab, SRK-181, SRK-439 and any future product candidates. Generally, before a new
drug or biologic can be marketed, considerable data demonstrating its quality, safety and efficacy must be obtained,
organized into a format specific for each regulatory authority, submitted for review and approved by the regulatory
authority.

a.  U.S. Biological Product Development

In the U.S., the FDA regulates drugs under the Federal Food, Drug, and Cosmetic Act (“FDCA”), and its implementing
regulations and biologics under the FDCA, the Public Health Service Act (“PHSA”), and their implementing regulations.
Both drugs and biologics also are subject to other federal, state and local statutes and regulations. The process of obtaining
regulatory approvals and the subsequent compliance with appropriate federal, state and local statutes and regulations
requires the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S.
requirements at any time during the product development process, approval process or post-market may subject an
applicant to administrative or judicial sanctions. These sanctions could include, among other actions, the FDA’s refusal to
approve pending applications, withdrawal of an approval, a clinical hold, untitled or warning letters, product recalls or
market withdrawals, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of
government contracts, restitution, disgorgement and civil or criminal penalties. Any agency or judicial enforcement action
could have a material adverse effect on us.

Apitegromab, SRK-181, and any future product candidates regulated as biologics must be approved by the FDA through a
Biologics License Application (“BLA”) process before they may be legally marketed in the U.S. The process generally
involves the following:

● Completion of extensive preclinical studies in accordance with applicable regulations, including studies

conducted in accordance with good laboratory practice (“GLP”) requirements;

● Manufacture of drug substance and drug product in accordance with applicable regulations, including

manufacturing activities performed in accordance with current good manufacturing practice (“cGMP”)
requirements;

● Submission to the FDA of an IND application, which must become effective before human clinical trials may

begin;

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● Approval by an institutional review board (“IRB”) or independent ethics committee at each clinical trial site

before each trial may be initiated;

● Performance of adequate and well-controlled human clinical trials in accordance with applicable IND regulations,
good clinical practice (“GCP”) requirements and other clinical trial related regulations to establish the safety and
efficacy of the investigational product for each proposed indication;

● Submission of a BLA to the FDA;

● A determination by the FDA within 60 days of its receipt of a BLA to accept the filing for review;

● Satisfactory completion of an FDA pre-approval inspection of the manufacturing facility or facilities where the

biologic will be produced to assess compliance with cGMP requirements to assure that the facilities, methods and
controls are adequate to preserve the biologic’s identity, strength, quality and purity;

● Potential FDA inspection of Scholar Rock and of the clinical trial sites that generated the data in support of the

BLA; and

● FDA review and approval of the BLA, including consideration of the views of any FDA advisory committee,

prior to any commercial marketing or sale of the biologic in the U.S.

i.  Preclinical Studies and IND

Preclinical studies include laboratory evaluation of product chemistry and formulation, as well as in vitro and animal
studies to assess the potential for adverse events and in some cases to establish a rationale for therapeutic use. The conduct
of preclinical studies is subject to federal regulations and requirements, including GLP regulations for safety/toxicology
studies.

An IND sponsor must submit 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, to the FDA as part of an IND. An
IND is a request for authorization from the FDA to administer an investigational product to humans, and must become
effective before human clinical trials may begin. Some long term preclinical testing may continue after the IND is
submitted. An IND automatically becomes effective 30 days after receipt by the FDA, unless before that time, the FDA
raises concerns or questions related to one or more proposed clinical trials and places the trial on clinical hold. In such a
case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. As a result,
submission of an IND may not result in the FDA allowing clinical trials to commence.

ii.  Clinical Trials

The clinical stage of development involves the administration of the investigational product to healthy volunteers or
patients under the supervision of qualified investigators, generally physicians not employed by or under the trial sponsor’s
control, in accordance with GCP requirements, which include the requirement that all patients provide their informed
consent for their participation in any clinical trial. Clinical trials are conducted under protocols detailing, among other
things, the objectives of the clinical trial, dosing procedures, subject selection and exclusion criteria and the parameters to
be used to monitor subject safety and assess efficacy. Each protocol, and any subsequent amendments to the protocol, must
be submitted to the FDA as part of the IND. Furthermore, each clinical trial must be reviewed and approved by an IRB for
each institution at which the clinical trial will be conducted to ensure that the risks to individuals participating in the
clinical trials are minimized and are reasonable in relation to anticipated benefits. The IRB also approves the informed
consent form that must be provided to each clinical trial subject or his or her legal representative, and must monitor the
clinical trial until completed. There also are requirements governing the reporting of ongoing clinical trials and completed
clinical trial results to public registries.

A sponsor who wishes to conduct a clinical trial outside of the U.S. may, but need not, obtain FDA authorization to
conduct the clinical trial under an IND. If a foreign clinical trial is not conducted under an IND, the sponsor may submit

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data from the clinical trial to the FDA in support of a BLA. The FDA will accept a well-designed and well conducted
foreign clinical study not conducted under an IND if the study was conducted in accordance with GCP requirements, and
the FDA is able to validate the data through an onsite inspection if deemed necessary.

Clinical trials generally are conducted in three sequential phases, known as Phase 1, Phase 2 and Phase 3, and may be
combined or overlap.

● Phase 1 clinical trials generally involve a small number of healthy volunteers or disease affected patients who are
initially exposed to a single dose and then multiple doses of the product candidate. The primary purpose of these
clinical trials is to assess the metabolism, pharmacologic action, side effect tolerability and safety of the product
candidate.

● Phase 2 clinical trials generally involve studies in disease affected patients to evaluate proof-of-concept and/or
determine the dosing regimen(s) for subsequent investigations. At the same time, safety and further PK and PD
information is collected, possible adverse effects and safety risks are identified and a preliminary evaluation of
efficacy is conducted.

● Phase 3 clinical trials generally involve a large number of patients at multiple sites and are designed to provide

the data necessary to demonstrate the effectiveness of the product for its intended use, its safety in use and to
establish the overall benefit/risk relationship of the product and provide an adequate basis for product labeling.

Post-approval trials, sometimes referred to as Phase 4 clinical trials, may be conducted after initial marketing approval.
These trials are used to gain additional experience from the treatment of patients in the intended therapeutic indication. In
certain instances, the FDA may mandate the performance of Phase 4 clinical trials as a condition of approval of a BLA.

Progress reports detailing the results of the clinical trials, among other information, must be submitted at least annually to
the FDA and written IND safety reports must be submitted to the FDA and the investigators for suspected unexpected
serious adverse reactions (“SUSARs”), findings from other studies or animal or in vitro testing that suggest a significant
risk for human subjects and any clinically important increase in the rate of a serious suspected adverse reaction over that
listed in the protocol or investigator brochure.

The FDA or the sponsor may suspend or terminate a clinical trial at any time on various grounds, including a finding that
the patients are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a
clinical trial at its institution if the clinical trial is not being conducted in accordance with the IRB’s requirements or if the
drug or biologic has been associated with unexpected serious harm to patients. Additionally, some clinical trials are
overseen by an independent group of qualified experts organized by the clinical trial sponsor, known as a data safety
monitoring board (“DSMB”) or committee. The DSMB provides recommendations for whether a trial may move forward
at designated check points based on access to certain data from the trial. Concurrent with clinical trials, companies usually
complete additional animal studies and also must develop additional information about the chemistry and physical
characteristics of the drug or biologic as well as finalize a process for manufacturing the product in commercial quantities
in accordance with cGMP requirements. The manufacturing process must be capable of consistently producing quality
batches of the product and, among other things, companies must develop methods for testing the identity, strength, quality
and purity of the final product. Additionally, appropriate packaging must be selected and tested and stability studies must
be conducted to demonstrate that the product candidates do not undergo unacceptable deterioration over their shelf life.

iii.  FDA Review Process

Following completion of the clinical trials, data are analyzed to assess whether the investigational product is safe and
effective for the proposed indicated use or uses. Chemistry, manufacturing and controls ("CMC") information, preclinical
studies and clinical trials results, and proposed labeling are submitted to the FDA as part of the BLA. The BLA is a request
for approval to market the biologic for one or more specified indications and must contain proof of safety, purity and
potency for a biologic. The application may include both negative and ambiguous results of preclinical

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studies and clinical trials, as well as positive findings. Data may come from company-sponsored clinical trials intended to
test the safety and efficacy of a product’s use or from a number of alternative sources, including studies initiated by
investigators. To support marketing approval, the data submitted must be sufficient in quality and quantity to establish the
safety and efficacy of the investigational product to the satisfaction of the FDA. FDA approval of a BLA must be obtained
before a biologic may be marketed in the U.S.

Under the Prescription Drug User Fee Act (“PDUFA”) as amended, each BLA must be accompanied by a user fee. The
FDA adjusts the PDUFA user fees on an annual basis. Fee waivers or reductions are available in certain circumstances,
including a waiver of the application fee for the first application filed by a small business. Additionally, no user fees are
assessed on BLAs for products designated as orphan drugs, unless the product also includes a non-orphan indication.

The FDA reviews all submitted BLAs before it accepts them for filing, and may request additional information rather than
accepting the BLA for filing. The FDA must make a decision on accepting a BLA for filing within 60 days of receipt, and
such decision could include a refusal to file (“RTF”) by the FDA. Once the submission is accepted for filing, the FDA
begins an in-depth review of the BLA. Under the goals and policies agreed to by the FDA under PDUFA, the FDA has
10 months, from the filing date, in which to complete its initial review of an original BLA and respond to the applicant, and
six months from the filing date of an original BLA designated for priority review. The FDA does not always meet its
PDUFA goal dates for standard and priority BLAs, and the review process is often extended by FDA requests for
additional information or clarification.

Before approving a BLA, the FDA will conduct a preapproval inspection of the manufacturing facilities for the new
product to determine whether they comply with cGMP requirements. The FDA will not approve the product 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. The FDA also may audit data from clinical trials
to ensure compliance with GCP requirements. Additionally, the FDA may refer applications for novel products or products
which present difficult questions of safety or efficacy to an advisory committee, typically a panel that includes clinicians
and other experts, for review, evaluation and a recommendation as to whether the application should be approved and
under what conditions, if any. The FDA is not bound by recommendations of an advisory committee, but it considers such
recommendations when making decisions on approval. The FDA likely will reanalyze the clinical trial data, which could
result in extensive discussions between the FDA and the applicant during the review process. After the FDA evaluates a
BLA, it will issue an Approval Letter or a Complete Response Letter. An Approval Letter authorizes commercial
marketing of the biologic with specific prescribing information for specific indications. The Approval Letter may also
include post-marketing requirements or commitments, such as the conduct of additional clinical trials or CMC studies. A
Complete Response Letter indicates that the review cycle of the application is complete and the application will not be
approved in its present form. A Complete Response Letter usually describes all of the specific deficiencies in the BLA
identified by the FDA. The Complete Response Letter may require additional clinical data, additional pivotal Phase 3
clinical trial(s) and/or other significant and time consuming requirements related to clinical trials, preclinical studies or
manufacturing. If a Complete Response Letter is issued, the applicant may either resubmit the BLA, addressing all of the
deficiencies identified in the letter, or withdraw the application. Even if such data and information are submitted, the FDA
may decide that the BLA does not satisfy the criteria for approval. Data obtained from clinical trials are not always
conclusive and the FDA may interpret data differently than we interpret the same data.

iv.  Orphan Drug Designation

Under the Orphan Drug Act, the FDA may grant orphan designation to a drug or biological product intended to treat a rare
disease or condition, which is generally a disease or condition that affects fewer than 200,000 individuals in the U.S., or
more than 200,000 individuals in the U.S. and for which there is no reasonable expectation that the cost of developing and
making the product available in the U.S. for this type of disease or condition will be recovered from sales of the product.

After the FDA grants orphan drug designation, the identity of the therapeutic agent and its potential orphan use are
disclosed publicly by the FDA. Orphan drug designation does not convey any advantage in or shorten the duration of the
regulatory review and approval process.

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If a product that has orphan designation subsequently receives the first FDA approval for the disease or condition for which
it has such designation, the product is entitled to orphan drug exclusivity, which means that the FDA may not approve any
other applications to market the same drug for the same indication for seven years from the date of such approval, except in
limited circumstances, such as a showing of clinical superiority to the product with orphan exclusivity by means of greater
effectiveness, greater safety or providing a major contribution to patient care or in instances of drug supply issues.
Competitors, however, may receive approval of either a different product for the same indication or the same product for a
different indication but that could be used off-label in the orphan indication. Orphan drug exclusivity also could block the
approval of one of our products for seven years if a competitor obtains approval before we do for the same product, as
defined by the FDA, for the same indication we are seeking approval, or if our product is determined to be contained
within the scope of the competitor’s product for the same indication or disease. If a product designated as an orphan drug
receives marketing approval for an indication broader than that which is designated, it may not be entitled to orphan drug
exclusivity. Orphan drug status in the European Union (“EU”) has similar, but not identical, requirements and benefits.

v.  Rare Pediatric Disease Designation

The FDA grants Rare Pediatric Disease designation for serious and life-threatening diseases that primarily affect children
ages 18 years or younger and fewer than 200,000 individuals in the United States. Eligibility for a priority review voucher
may be issued upon approval of a BLA or New Drug Application for therapies developed to treat such rare pediatric
diseases. Priority review vouchers may be redeemed to obtain priority review for any subsequent marketing application or
be sold or transferred.

vi.  Expedited Development and Review Programs

The FDA has a Fast Track program that is intended to expedite or facilitate the process for reviewing new drugs and
biologics that meet certain criteria. Specifically, new drugs and biologics are eligible for Fast Track designation if they are
intended to treat a serious or life-threatening condition and preclinical or clinical data demonstrate the potential to address
unmet medical needs for the condition. Fast Track designation applies to both the product and the specific indication for
which it is being studied. The sponsor can request the FDA to designate the product for Fast Track status any time before
receiving BLA approval, but ideally no later than the pre-BLA meeting. Any product submitted to the FDA for marketing,
including under a Fast Track program, may be eligible for other types of FDA programs intended to expedite development
and review, such as priority review and accelerated approval. Any product is eligible for priority review if it treats a serious
or life-threatening condition and, if approved, would provide a significant improvement in safety and effectiveness
compared to available therapies. The FDA will attempt to direct additional resources to the evaluation of an application for
a new drug or biologic designated for priority review in an effort to facilitate the review.

A product may also be eligible for accelerated approval, if it treats a serious or life-threatening condition and generally
provides a meaningful advantage over available therapies. Accelerated approval may also be granted in the case that there
are no alternative treatments available. In addition, it must demonstrate an effect on a surrogate endpoint that is reasonably
likely to predict clinical benefit or on a clinical endpoint that can be measured earlier than irreversible morbidity or
mortality (“IMM”), that is reasonably likely to predict an effect on IMM or other clinical benefit. As a condition of
approval, the FDA may require that a sponsor of a drug or biologic receiving accelerated approval perform adequate and
well-controlled post-marketing clinical trials with due diligence and, under the Food and Drug Omnibus Reform Act of
2022 (“FDORA”), the FDA is now permitted to require, as appropriate, that such trials be underway prior to approval or
within a specific time period after, the date accelerated approval is granted. In addition, for products being considered for
accelerated approval, the FDA currently requires, unless otherwise informed by the agency, that all advertising and
promotional materials intended for dissemination or publication within 120 days of marketing approval be submitted to the
agency for review during the pre-approval review period. If the FDA concludes that a drug or biologic shown to be
effective can be safely used only if distribution or use is restricted, it will require such post-marketing restrictions, as it
deems necessary to assure safe use of the product. Under FDORA, the FDA has increased authority for expedited
procedures to withdraw approval of a product or indication approved under accelerated approval if, for example, the
confirmatory trial fails to verify the predicted clinical benefit of the product.

Additionally, a drug or biologic may be eligible for designation as a breakthrough therapy if the product is intended, alone
or in combination with one or more other drugs or biologics, to treat a serious or life-threatening condition and

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preliminary clinical evidence indicates that the product may demonstrate substantial improvement over currently approved
therapies on one or more clinically significant endpoints. The benefits of breakthrough therapy designation include the
same benefits as Fast Track designation, plus intensive guidance from the FDA to ensure an efficient drug development
program.

Fast Track designation, priority review, accelerated approval and breakthrough therapy designation do not change the
standards for approval, but may expedite the development or approval process.

vii.  Pediatric Information

Under the Pediatric Research Equity Act (“PREA”), as amended, a BLA or supplement to a BLA must contain data to
assess the safety and efficacy of the drug 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. The FDA may grant
deferrals for submission of pediatric data or full or partial waivers. Unless otherwise required by regulation, PREA does
not apply to any biological product for an indication for which orphan designation has been granted. A sponsor who is
planning to submit a marketing application for a drug that includes a new active ingredient, new indication, new dosage
form, new dosing regimen or new route of administration submits an initial Pediatric Study Plan (“PSP”) within 60 days of
an end-of-Phase 2 meeting or, if there is no such meeting, as early as practicable before the initiation of the Phase 3 or
Phase 2/3 study. The initial PSP must include an outline of the pediatric study or studies that the sponsor plans to conduct,
including study objectives and design, age groups, relevant endpoints and statistical approach, or a justification for not
including such detailed information, and any request for a deferral of pediatric assessments or a full or partial waiver of the
requirement to provide data from pediatric studies along with supporting information. The FDA and the sponsor must reach
an agreement on the PSP. A sponsor can submit amendments to an agreed-upon initial PSP at any time if changes to the
pediatric plan need to be considered based on data collected from preclinical studies, early phase clinical trials and/or other
clinical development programs.

viii.  Post-marketing Requirements

Following approval of a new product, the manufacturer and the approved product are subject to continuing regulation by
the FDA, including, among other things, monitoring and record-keeping activities, reporting of adverse experiences,
complying with promotion and advertising requirements, which include restrictions on promoting products for unapproved
uses or patient populations (known as “off-label use”) and limitations on industry-sponsored scientific and educational
activities. Although physicians may prescribe legally available products for off-label uses, manufacturers may not market
or promote such uses. Prescription drug and biologic promotional materials must be submitted to the FDA in conjunction
with their first use. Further, if there are any modifications to the drug or biologic, including changes in indications, labeling
or manufacturing processes or facilities, the applicant may be required to submit and obtain FDA approval of a new BLA
or BLA supplement, which may require the development of additional data or preclinical studies and clinical trials.

The FDA may also place other conditions on approvals including the requirement for a Risk Evaluation and Mitigation
Strategy (“REMS”) to assure the safe use of the product. If the FDA concludes a REMS is needed, the sponsor of the BLA
must submit a proposed REMS. The FDA will not approve the BLA without an approved REMS, if required. A REMS
could include medication guides, physician communication plans or elements to assure safe use, such as restricted
distribution methods, patient registries and other risk minimization tools. Any of these limitations on approval or marketing
could restrict the commercial promotion, distribution, prescription or dispensing of products. Newly discovered or
developed safety or effectiveness data may require changes to a drug’s approved labeling, including the addition of new
warnings and contraindications, and also may require the implementation of other risk management measures, including a
REMS or the conduct of post-marketing studies to assess a newly discovered safety issue. Product approvals may be
withdrawn for non-compliance with regulatory standards or if problems occur following initial marketing.

FDA regulations require that products be manufactured in specific approved facilities and in accordance with cGMP
regulations. These manufacturers must comply with cGMP regulations that require, among other things, quality control and
quality assurance, the maintenance of records and documentation and the obligation to investigate and correct any
deviations from cGMP. Manufacturers and other entities involved in the manufacture and distribution of approved drugs or
biologics are required to register their establishments with the FDA and certain state agencies, and are subject to

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periodic unannounced inspections by the FDA and certain state agencies for compliance with cGMP requirements and
other laws, as well as applicable tracking and tracing requirements. Accordingly, manufacturers must continue to expend
time, money and effort in the area of production and quality control to maintain cGMP compliance. The discovery of
violative conditions, including failure to conform to cGMP regulations, could result in enforcement actions, and the
discovery of problems with a product after approval may result in restrictions on a product, manufacturer or holder of an
approved BLA, including recall.

ix.  Other Regulatory Matters

Manufacturing, sales, promotion and other activities following product approval are also subject to regulation by numerous
regulatory authorities in the U.S. in addition to the FDA, including the Centers for Medicare & Medicaid Services
(“CMS”), other divisions of the Department of Health and Human Services (“HHS”), the Department of Justice, the
Consumer Product Safety Commission, the Federal Trade Commission, the Occupational Safety & Health Administration,
the Environmental Protection Agency and state and local governments.

x.  Other Healthcare and Privacy Laws

Healthcare providers, physicians, and third-party payors will play a primary role in the recommendation and prescription of
any products 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. In particular, the research of our product candidates, as well as the
promotion, sales and marketing of healthcare items and services, as well as certain business arrangements in the healthcare
industry, are subject to extensive laws designed to prevent fraud, kickbacks, self-dealing and other abusive practices. These
laws and regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, structuring
and commission(s), certain customer incentive programs and other business arrangements generally. Activities subject to
these laws also involve the improper use of information obtained in the course of patient recruitment for clinical trials. In
the U.S., these laws include, without limitation, state and federal anti-kickback, false claims, physician transparency, and
patient data privacy and security laws and regulations, including but not limited to those described below.

● The Anti-Kickback Statute, which makes it illegal for among other things, any person or entity, including a

prescription drug manufacturer (or a party acting on its behalf), to knowingly and willfully solicit, receive, offer
or pay any remuneration, directly or indirectly, overtly or covertly, in cash or in kind, that is intended to induce or
reward referrals, including the purchase, recommendation, order or prescription of a particular drug, for which
payment may be made under a federal healthcare program, such as Medicare or Medicaid. Violations of this law
are punishable by individual imprisonment, criminal fines, administrative civil money penalties and exclusion
from participation in federal healthcare programs. In addition, a person or entity does not need to have actual
knowledge of the statute or specific intent to violate it to have committed a violation.

● The federal civil and criminal false claims laws, including the False Claims Act (“FCA”), which prohibits

individuals or entities (including prescription drug manufacturers) from 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. The government may deem manufacturers to have “caused” the submission of false or
fraudulent claims by, for example, providing inaccurate billing or coding information to customers or promoting a
product off label. Claims which include items or services resulting from a violation of the Anti-Kickback Statute
are false or fraudulent claims for purposes of the FCA. Our future marketing and activities relating to the
reporting of wholesaler or estimated retail prices for our products, the reporting of prices used to calculate
Medicaid rebate information and other information affecting federal, state and third-party reimbursement for our
products, and the sale and marketing of our product and any future product candidates, are subject to scrutiny
under this these laws.

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● The Health Insurance Portability and Accountability Act of 1996 (“HIPAA”), which created additional federal

criminal statutes that prohibit among other things, knowingly and willfully executing a scheme, or attempting to
execute a scheme, to defraud any healthcare benefit program, including private payors, or knowingly and
willfully falsifying, concealing or covering up a material fact or making any materially false statements in
connection with the delivery of or payment for healthcare benefits, items or services. Similar to the federal Anti-
Kickback Statute, a person or entity does not need to have actual knowledge of the statute or specific intent to
violate it in order to have committed a violation.

● HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act of 2009
(“HITECH”), and their respective implementing regulations, which impose, among other things, specified
requirements on covered entities, which include certain healthcare providers, health plans and healthcare
clearinghouses, and their business associates, which include individuals or entities that perform services for
covered entities involving the creation, use, maintenance or disclosure of, individually identifiable health
information, relating to the privacy and security of individually identifiable health information including
mandatory contractual terms and required implementation of technical safeguards of such information. HITECH
also created new tiers of civil monetary penalties, amended HIPAA to make civil and criminal penalties directly
applicable to business associates, and gave state attorneys general new authority to file civil actions for damages
or injunctions in federal courts to enforce the federal HIPAA laws and seek attorneys’ fees and costs associated
with pursuing federal civil actions.

● The U.S. Physician Payments Sunshine Act (the “Sunshine Act”), enacted as part of the Patient Protection and

Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010 (collectively, the
“ACA”), which impose new annual reporting requirements for certain manufacturers of drugs, devices, biologics,
and medical supplies for which payment is available under Medicare, Medicaid, or the Children’s Health
Insurance Program, for certain payments and “transfers of value” provided to physicians (defined to include
doctors, dentists, optometrists, podiatrists and chiropractors), non-physician providers (such as physician
assistants and nurse practitioners, among others), and teaching hospitals, as well as ownership and investment
interests held by physicians and their immediate family members.

● Analogous state and foreign fraud and abuse laws and regulations, such as state anti-kickback and false claims
laws, which may be broader in scope and apply regardless of payor. Such laws are enforced by various state
agencies and through private actions. Some state laws require pharmaceutical companies to comply with the
pharmaceutical industry’s voluntary compliance guidelines and the relevant federal government compliance
guidance, require drug manufacturers to report information related to payments and other transfers of value to
physicians and other healthcare providers, and restrict marketing practices or require disclosure of marketing
expenditures. Some state and local laws require the registration of pharmaceutical sales representatives.

● Many states in which we operate also have laws that protect the privacy and security of sensitive and personal

information. Certain state laws may be more stringent or broader in scope, or offer greater individual rights, with
respect to sensitive and personal information than federal, international or other state laws, and such laws may
differ from each other, which may complicate compliance efforts. Where state laws are more protective than
HIPAA, we must comply with the state laws we are subject to, in addition to HIPAA. In certain cases, it may be
necessary to modify our planned operations and procedures to comply with these more stringent state laws.

● In some cases where we process sensitive and personal information of individuals from numerous states, we may
find it necessary to comply with the most stringent state laws applicable to any of the information. For example,
the California Consumer Privacy Act (the “CCPA”), which creates comprehensive individual privacy rights for
California consumers (as defined in the law) and places increased privacy and security obligations on entities
handling personal data of consumers or households, went into effect on January 1, 2020. The CCPA requires
covered companies to provide certain disclosures to consumers about its data collection, use and sharing
practices, and to provide affected California residents with ways to opt-out of certain sales or transfers of personal
information. In addition, the California Privacy Rights Act, or CPRA, amendment to the CCPA was passed in
November 2020, and as of January 1, 2023 has imposed additional obligations on companies covered

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by the legislation.  The CPRA significantly modified the CCPA, including by expanding consumers’ rights with 
respect to certain sensitive personal information. As currently written, the CCPA may impact our business 
activities and as a result may increase our compliance costs and potential liability.

Similar comprehensive privacy laws have been passed in numerous other states and other states have proposed similar new
privacy laws. Such proposed legislation, if enacted, may add additional complexity, variation in requirements, restrictions
and potential legal risk, require additional investment of resources in compliance programs, impact strategies and the
availability of previously useful data and could result in increased compliance costs and/or changes in business practices
and policies. The existence of comprehensive privacy laws in different states in the country would make our compliance
obligations more complex and costly and may increase the likelihood that we may be subject to enforcement actions or
otherwise incur liability for noncompliance. There are also states that are specifically regulating health information. For
example, Washington state recently passed a health privacy law that will regulate the collection and sharing of health
information, and the law also has a private right of action, which further increases the relevant compliance risk.
Connecticut and Nevada have also passed similar laws regulating consumer health data. In addition, other states have
proposed and/or passed legislation that regulates the privacy and/or security of certain specific types of information. For
example, a small number of states have passed laws that regulate biometric data specifically. These various privacy and
security laws may impact our business activities, including our identification of research subjects, relationships with
business partners and ultimately the marketing and distribution of our products. State laws are changing rapidly and there is
discussion in the U.S. Congress of a new comprehensive federal data privacy law to which we may likely become subject,
if enacted.

All of these evolving compliance and operational requirements impose significant costs, such as costs related to
organizational changes, implementing additional protection technologies, training employees and engaging consultants and
legal advisors, which are likely to increase over time. In addition, such requirements may require us to modify our data
processing practices and policies, utilize management’s time and/or divert resources from other initiatives and projects.
Any failure or perceived failure by us to comply with any applicable federal, state or foreign laws and regulations relating
to data privacy and security could result in damage to our reputation, as well as proceedings or litigation by governmental
agencies or other third parties, including class action privacy litigation in certain jurisdictions, which would subject us to
significant fines, sanctions, awards, injunctions, penalties or judgments. Any of the foregoing could have a material
adverse effect on our business, financial condition, results of operations and prospects.

The scope and enforcement of each of these laws is uncertain and subject to rapid change in the current environment of
healthcare reform, especially in light of the lack of applicable precedent and regulations. Federal and state enforcement
bodies have recently increased their scrutiny of interactions between healthcare companies and healthcare providers, which
has led to a number of investigations, prosecutions, convictions and settlements in the healthcare industry. It is possible that
governmental authorities will conclude that our business practices do 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 related governmental regulations that may apply to us, we may be subject to
significant civil, criminal and administrative penalties, damages, fines, individual imprisonment, disgorgement, exclusion
of drugs from participation in state and federal healthcare programs, such as Medicare and Medicaid, reputational harm,
additional oversight and reporting obligations if we become subject to a corporate integrity agreement or similar settlement
to resolve allegations of non-compliance with these laws 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 similar actions, penalties and sanctions. Ensuring business
arrangements comply with applicable healthcare laws, as well as responding to possible investigations by government
authorities, can be time and resource consuming and can divert a company’s attention from the business.

xi.  Current and Future Healthcare Reform Legislation

In the U.S. and foreign jurisdictions, there have been a number of legislative and regulatory changes and proposed changes
regarding the healthcare system that could prevent or delay marketing approval of our product candidates, restrict or
regulate post-approval activities and affect our ability to profitably sell any product candidates for which we obtain
marketing approval. We expect that current laws, as well as other healthcare reform measures that may be

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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.

In the U.S., for example, in March 2010, the ACA was enacted. The ACA, among other things:

● subjects biological products to potential competition by lower cost biosimilars;

● addresses 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;

● increases the minimum Medicaid rebates owed by manufacturers under the Medicaid Drug Rebate Program and

extends the rebate program to individuals enrolled in Medicaid managed care organizations;

● establishes annual fees and taxes on manufacturers of certain branded prescription drugs;

● expands healthcare fraud and abuse laws, including the False Claims Act and the Anti-Kickback Statute,

establishes new government investigative powers and enhanced penalties for non-compliance;

● creates a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 50%

(increased to 70% as of January 1, 2019) point of sale discounts off negotiated prices of applicable brand drugs to
eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs to
be covered under Medicare Part D;

● expands eligibility criteria for Medicaid programs by, among other things, allowing states to offer Medicaid

coverage to additional individuals with income at or below 133% of the federal poverty level, thereby potentially
increasing manufacturers’ Medicaid rebate liability;

● expands the entities eligible for discounts under the PHS Act’s pharmaceutical pricing program, also known as

the 340B Drug Pricing Program;

● creates new requirements to report financial arrangements with physicians and teaching hospitals, commonly

referred to as the Physician Payments Sunshine Act;

● creates a new requirement to annually report the identity and quantity of drug samples that manufacturers and

authorized distributors of record provide to physicians;

● creates a new Patient Centered Outcomes Research Institute to oversee, identify priorities in and conduct

comparative clinical effectiveness research, along with funding for such research; and

● establishes the Center for Medicare and Medicaid Innovation at CMS to test innovative payment and service

delivery models to lower Medicare and Medicaid spending.

Some of the provisions of the ACA have been subject to judicial challenges as well as efforts to repeal, replace or
otherwise modify them or to alter their interpretation or implementation. For example:

● The Budget Control Act of 2011, among other things, created the Joint Select Committee on Deficit Reduction to
recommend to Congress proposals for spending reductions. The Joint Selection Committee on Deficit Reduction
did not achieve a targeted deficit reduction, which triggered the legislation’s automatic reduction to several
government programs. In concert with subsequent legislation, this includes aggregate reductions to Medicare
payments to providers of, on average, 2% per fiscal year. These reductions went into effect on April 1, 2013 and,
due to subsequent legislative amendments to the statute, will remain in effect through 2031. Due to the Statutory
Pay-As-You-Go Act of 2010, estimated budget deficit increases resulting from the American

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Rescue Plan Act of 2021, and subsequent legislation, Medicare payments to providers may be further reduced by
4% starting in 2025, absent further legislation.

● The American Taxpayer Relief Act of 2012 reduced Medicare payments to several types of health care providers
and increased the statute of limitations period for the government to recover overpayments to providers from
three to five years, among other things.

● The Tax Cuts and Jobs Act of 2017 (“Tax Act”), includes a provision that eliminated the tax-based shared
responsibility payment imposed by the ACA on certain individuals who fail to maintain qualifying health
coverage for all or part of a year, commonly referred to as the “individual mandate,” effective January 1, 2019.

● The Bipartisan Budget Act of 2018 (“BBA”), among other things, amends the Medicare statute, effective January
1, 2019, to close the coverage gap in most Medicare drug plans, commonly referred to as the “donut hole” by
raising the manufacturer discount under the Medicare Part D coverage gap discount program to 70% (as of
January 1, 2019).

● On March 11, 2021, President Biden signed the American Rescue Plan Act of 2021 into law, which eliminates the
statutory Medicaid drug rebate cap, currently set at 100% of a drug’s average manufacturer price, for single
source and innovator multiple source drugs, beginning January 1, 2024.

● In addition to these legislative efforts, on June 17, 2021, the U.S. Supreme Court dismissed the most recent

judicial challenge to the ACA brought by several states without specifically ruling on the constitutionality of the
ACA. Prior to the Supreme Court’s decision, President Biden issued an executive order to initiate a special
enrollment period from February 15, 2021, which was subsequently extended through August 15, 2021, during
which consumers can enroll in coverage (or adjust existing enrollment) in states with marketplaces served by the
HealthCare.gov platform. State-based marketplaces operating their own platform have the option to take similar
actions in their states. The executive order also directed certain federal agencies to review and reconsider their
existing policies and rules that limit access to healthcare, including among others, reexamining Medicaid
demonstration projects and waiver programs that include work requirements, and policies that create unnecessary
barriers to obtaining access to health insurance coverage through Medicaid or the ACA. Additional legislative
challenges, regulatory changes and judicial challenges related to the ACA remain possible.

Additionally, there has been increasing legislative, regulatory, and enforcement interest in the United States with respect to
drug pricing practices. Specifically, there have been several recent U.S. Congressional inquiries and proposed and enacted
federal and state legislation designed to, among other things, bring more transparency to drug pricing, reduce the cost of
prescription drugs under Medicare, address the potential for importation of drugs into the United States, review the
relationship between pricing and manufacturer patient programs, and reform government program reimbursement
methodologies for drugs.

● Additionally, on December 2, 2020, HHS published a regulation removing safe harbor protection for price

reductions from pharmaceutical manufacturers to plan sponsors under Part D, either directly or through pharmacy
benefit managers, unless the price reduction is required by law. The rule also creates a new safe harbor for price
reductions reflected at the point-of-sale, as well as a safe harbor for certain fixed fee arrangements between
pharmacy benefit managers and manufacturers. Pursuant to court order, the removal and addition of the
aforementioned safe harbors were delayed and recent legislation imposed a moratorium on implementation of the
rule until January 1, 2026. The Inflation Reduction Act (the “IRA”) of 2022 further delayed implementation of
this rule to January 1, 2032.

● The IRA includes several other provisions that may impact our business to varying degrees, including provisions
that create a $2,000 out-of-pocket cap for Medicare Part D beneficiaries on prescription drugs, impose new
requirements for manufacturers of all drugs to offer discounts under Medicare Part D, allow the U.S. government
to negotiate Medicare Part B and Part D pricing for certain high-cost drugs and biologics without generic or
biosimilar competition, and require companies to pay rebates to Medicare for drug prices

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that increase faster than inflation. Drugs and biologics that have received orphan designation for one rare disease
or condition and the only approved indication is for that disease or condition are exempted from the IRA’s price
negotiation provisions. A drug or biologic with orphan designations for multiple diseases or conditions or with
multiple indications, however, will remain potentially subject to the price negotiation provisions.

Although a number of these and other proposed measures may require authorization through additional legislation to
become effective, and the Biden administration may reverse or otherwise change these measures, both the Biden
administration and Congress have indicated that they will continue to seek new legislative measures to control drug costs.

Individual states in the United States have also increasingly passed legislation and implemented regulations designed to
control pharmaceutical product pricing, including by imposing price or patient assistance constraints, restrictions on certain
product access, marketing cost disclosure and other transparency measures, and, in some cases, measures designed to
encourage importation of pharmaceutical products from other countries and bulk purchasing.

xii.  Packaging and Distribution in the U.S.

If our products are made available to authorized users of the Federal Supply Schedule of the General Services
Administration, additional laws and requirements apply. Products must meet applicable child resistant packaging
requirements under the U.S. Poison Prevention Packaging Act. Manufacturing, sales, promotion and other activities also
are potentially subject to federal and state consumer protection and unfair competition laws.

The distribution of pharmaceutical products is subject to additional requirements and regulations, including extensive
record keeping, licensing, storage and security requirements intended to prevent the unauthorized sale of pharmaceutical
products.

The failure to comply with any of these laws or regulatory requirements subjects firms to possible legal or regulatory
action. Depending on the circumstances, failure to meet applicable regulatory requirements can result in criminal
prosecution, fines or other penalties, injunctions, exclusion from federal healthcare programs, requests for recall, seizure of
products, total or partial suspension of production, denial or withdrawal of product approvals, or refusal to allow a firm to
enter into supply contracts, including government contracts.

Changes in regulations, statutes or the interpretation of existing regulations could impact our business in the future by
requiring, for example: (i) changes to our manufacturing arrangements; (ii) additions or modifications to product labeling;
(iii) the recall or discontinuation of our products; or (iv) additional record keeping requirements.

xiii.  Other U.S. Environmental, Health and Safety Laws and Regulations

We may be 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. From time
to time and in the future, our operations may involve the use of hazardous and flammable materials, including chemicals
and biological materials, and may also produce hazardous waste products. Even if we contract with third parties for the
disposal of these materials and waste products, we cannot completely eliminate the risk of contamination or injury resulting
from these materials. In the event of contamination or injury resulting from the use or disposal of our 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 for failure to comply with such laws and regulations.

We maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our
employees, but this insurance may not provide adequate coverage against potential liabilities. However, we do not maintain
insurance for environmental liability or toxic tort claims that may be asserted against us.

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xiv.  U.S. Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration and specifics of FDA approval of our current product candidates and any future
product candidates, some of our U.S. patents may be eligible for limited patent term extension under the Drug Price
Competition and Patent Term Restoration Act of 1984, commonly referred to as the Hatch Waxman Amendments. The
Hatch Waxman Amendments permit restoration of the patent term of up to five years as compensation for patent term lost
during product development and FDA regulatory review process. Patent term restoration, however, cannot extend the
remaining term of a patent beyond a total of 14 years from the product’s approval date. The patent term restoration period
is generally one half the time between the effective date of an IND and the submission date of a BLA plus the time between
the submission date of a BLA and the approval of that application, except that the review period is reduced by any time
during which the applicant failed to exercise due diligence. Only one patent applicable to an approved drug is eligible for
the extension and the application for the extension must be submitted prior to the expiration of the patent. The U.S. PTO, in
consultation with the FDA, reviews and approves the application for any patent term extension or restoration. In the future,
we may apply for restoration of patent term for our currently owned or licensed patents to add patent life beyond its current
expiration date, depending on the expected length of the clinical trials and other factors involved in the filing of the
relevant BLA.

An abbreviated approval pathway for biological products shown to be biosimilar to, or interchangeable with, an FDA
licensed reference biological product was created by the Biologics Price Competition and Innovation Act of 2009 (“BPCI
Act”). This amendment to the PHSA, in part, attempts to minimize duplicative testing. Biosimilarity, which requires that
the biological product be highly similar to the reference product notwithstanding minor differences in clinically inactive
components and that there be no clinically meaningful differences between the product and the reference product in terms
of safety, purity and potency, can be shown through analytical studies, animal studies and a clinical trial or trials.
Interchangeability requires that a biological product be biosimilar to the reference product and that the product can be
expected to produce the same clinical results as the reference product in any given patient and, for products administered
multiple times to an individual, that the product and the reference product may be alternated or switched after one has been
previously administered without increasing safety risks or risks of diminished efficacy relative to exclusive use of the
reference biological product without such alternation or switch.

A reference biological product is granted 12 years of data exclusivity from the time of first licensure of the product, and the
FDA will not accept an application for a biosimilar or interchangeable product based on the reference biological product
until four years after the date of first licensure of the reference product. “First licensure” typically means the initial date the
particular product at issue was licensed in the U.S. Date of first licensure does not include the date of licensure of (and a
new period of exclusivity is not available for) a biological product if the licensure is for a supplement for the biological
product or for a subsequent application by the same sponsor or manufacturer of the biological product (or licensor,
predecessor in interest, or other related entity) for a change (not including a modification to the structure of the biological
product) that results in a new indication, route of administration, dosing schedule, dosage form, delivery system, delivery
device or strength, or for a modification to the structure of the biological product that does not result in a change in safety,
purity, or potency.

Pediatric exclusivity is another type of regulatory market exclusivity in the U.S. Pediatric exclusivity, if granted, adds six
months to existing regulatory exclusivity periods for all formulations, dosage forms, and indications of the biologic. This
six-month exclusivity may be granted based on the voluntary completion of a pediatric trial in accordance with an FDA
issued “Written Request” for such a trial.

b.  European Union Drug Development

In the EU, our future products also may be subject to extensive regulatory requirements. As in the U.S., medicinal products
can be marketed only if a marketing authorization from the competent regulatory agencies has been obtained.

Similar to the U.S., the various phases of preclinical and clinical research in the EU are subject to significant regulatory
controls.

In April 2014, the EU adopted the Clinical Trials Regulation EU No 536/2014, which replaced the Clinical Trials Directive
2001/20/EC on January 31, 2022. The main characteristics of the new Clinical Trials Regulation include: a streamlined
application procedure via a single-entry point through the Clinical Trials Information System (“CTIS”); a single set of
documents to be prepared and submitted for the application as well as simplified reporting procedures for

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clinical trial sponsors; and a harmonized procedure for the assessment of applications for clinical trials, which is divided
into two parts (Part I contains scientific and medicinal product documentation and Part II contains the national and patient-
level documentation). Part I is assessed by a coordinated review by the competent authorities of all EU Member States in
which an application for authorization of a clinical trial has been submitted (Member States concerned) of a draft report
prepared by a Reference Member State. Part II is assessed separately by each Member State concerned. Strict deadlines
have been established for the assessment of clinical trial applications. The role of the relevant ethics committees in the
assessment procedure will continue to be governed by the national law of the concerned EU Member State. However,
overall related timelines will be defined by the Clinical Trials Regulation. The transitory provisions of the Clinical Trial
Regulation provide that, by January 31, 2025, all ongoing clinical trials must have transitioned to the Clinical Trials
Regulation.

In the EU the Paediatric Committee (“PDCO”) of the EMA must approve a pediatric investigation plan (“PIP”) prior to an
applicant filing a marketing authorization application (“MAA”), unless the EMA has granted a product-specific waiver or a
class waiver. The PIP outlines the pharmaceutical company’s strategy for investigation of the new medicinal product in the
pediatric population. Before an MAA can be filed, or an existing marketing authorization can be amended, the EMA
determines whether companies actually comply with the agreed studies and measures listed in each relevant PIP. If an
applicant obtains a marketing authorization in all EU Member States, or a marketing authorization granted in the
centralized procedure by the EC, and the study results for the pediatric population are included in the product information,
even when negative, the medicine is then eligible for an additional six-month period of qualifying patent protection through
extension of the term of any supplementary protection certificate (“SPC”), provided an application for such extension is
made at the same time as filing the SPC application for the product, or at any point up to 2 years before the SPC expires. In
the case of orphan medicinal products, a two-year extension of the orphan market exclusivity may be available. This
pediatric reward is subject to specific conditions and is not automatically available when data in compliance with the PIP
are developed and submitted.

i.  European Union Expedited Review and Development

PRIME is a scheme provided by the EMA to enhance support for the development of medicines that target an unmet
medical need and provides accelerated assessment of products representing substantial innovation where the MAA will be
made through the centralized procedure. To qualify for PRIME, product candidates require early clinical evidence that the
therapy has the potential to offer a major therapeutic advantage over existing treatments or benefits patients without
treatment options. Products from small-and medium-sized enterprises (“SMEs”) may qualify for earlier entry into the
PRIME scheme than larger companies. Among the benefits of PRIME are the appointment of a rapporteur to provide
continuous support and help build knowledge ahead of an MAA, early dialogue and scientific advice at key development
milestones, and the potential to qualify products for accelerated review earlier in the application process. The receipt of
PRIME designation does not change the standards for approval but may expedite the development or approval process.
Where, during the course of development, a product no longer meets the eligibility criteria, support under the PRIME
scheme may be withdrawn.

ii.  European Union Drug Marketing

Much like the Anti-Kickback Statute prohibition in the U.S., the provision of benefits or advantages to physicians to induce
or encourage the prescription, recommendation, endorsement, purchase, supply, order or use of medicinal products is also
prohibited in the EU. The provision of benefits or advantages to physicians to induce or reward improper performance
generally is typically governed by the national anti-bribery laws of European Union Member States, and the Bribery Act
2010 in the UK. Infringement of these laws could result in substantial fines and imprisonment. EU Directive 2001/83/EC,
which is the EU Directive governing medicinal products for human use, further provides that, where medicinal products
are being promoted to persons qualified to prescribe or supply them, no gifts, pecuniary advantages or benefits in kind may
be supplied, offered or promised to such persons unless they are inexpensive and relevant to the practice of medicine or
pharmacy. This provision has been transposed into the Human Medicines Regulations 2012 and so remains applicable in
the UK despite its departure from the EU.

Payments made to physicians in certain EU Member States must be publicly disclosed. Moreover, agreements with
physicians often must be the subject of prior notification and approval by the physician’s employer, his or her competent
professional organization and/or the regulatory authorities of the individual EU Member States. These requirements are

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provided in the national laws, industry codes or professional codes of conduct, applicable in the EU Member States. Failure
to comply with these requirements could result in reputational risk, public reprimands, administrative penalties, fines or
imprisonment.

iii.  European Union Drug Review and Approval

In the EU, medicinal products can only be commercialized after obtaining a marketing authorization (“MA”). There are
two types of MAs.

Centralized MAs, which are issued by the EC through the centralized procedure, based on the opinion of the Committee for
Medicinal Products for Human Use (“CHMP”) of the EMA, are valid throughout the EU, and in the additional Member
States (Iceland, Liechtenstein and Norway) of the European Economic Area (“EEA”). The centralized procedure is
mandatory for certain types of products, such as medicinal products produced by certain biotechnological processes,
products designated as orphan medicinal products, advanced therapy medicinal products (i.e., gene therapy, somatic cell
therapy or tissue engineered medicines) and medicinal products containing a new active substance indicated for the
treatment of HIV, AIDS, cancer, neurodegenerative disorders, diabetes, autoimmune and other immune dysfunctions and
viral diseases. The centralized procedure is optional for products containing a new active substance not yet authorized in
the EU, or for products that constitute a significant therapeutic, scientific or technical innovation or which are in the
interest of public health in the EU.

National MAs, which are issued by the competent authorities of the EU Member States and only cover their respective
territory, are available for products not falling within the mandatory scope of the centralized procedure. Where a product
has already been authorized for marketing in an EU Member State, this national MA can be recognized in another Member
State through the mutual recognition procedure. If the product has not received a national MA in any Member State at the
time of application, it can be approved simultaneously in various Member States through the decentralized procedure.
Under the decentralized procedure an identical dossier is submitted to the competent authorities of each of the Member
States in which the MA is sought, one of which is selected by the applicant as the reference Member State (“RMS”). The
competent authority of the RMS prepares a draft assessment report, a draft summary of the product characteristics
(“SmPC”), and a draft of the labeling and package leaflet, which are sent to the other Member States (referred to as the
Member States Concerned) for their approval. If the Member States Concerned raise no objections, based on a potential
serious risk to public health, to the assessment, SmPC, labeling, or packaging proposed by the RMS, the product is
subsequently granted a national MA in all the Member States (i.e., in the RMS and the Member States Concerned).

Under the above described procedures, before granting the MA, the EMA or the competent authorities of the EU Member
States make an assessment of the risk benefit balance of the product on the basis of scientific criteria concerning its quality,
safety and efficacy.

iv.  European Union Data and Market Exclusivity

In the EU, new products authorized for marketing (i.e., reference products) qualify for eight years of data exclusivity and
an additional two years of market exclusivity upon marketing authorization. The data exclusivity, if granted, prevents
applicants for authorization of generics or biosimilars of these innovative products from referencing the innovator’s
preclinical and clinical trial data contained in the dossier of the reference product when applying for a generic or biosimilar
MA in the EU, during a period of eight years from the date on which the reference product was first authorized in the EU.
During an additional two-year period of market exclusivity, a generic or biosimilar MAA can be submitted, and the
innovator’s data may be referenced, but no generic or biosimilar medicinal product can be placed on the EU market until
the expiration of the market exclusivity. The overall 10-year period will be extended to a maximum of 11 years if, during
the first eight years of those 10 years, the marketing authorization holder obtains an authorization for one or more new
therapeutic indications which, during the scientific evaluation prior to their authorization, are determined to bring a
significant clinical benefit in comparison with currently approved therapies. There is no guarantee that a product will be
considered by the EMA to be an innovative medicinal product, and products may not qualify for data exclusivity. Even if a
product is considered to be an innovative medicinal product so that the innovator gains the prescribed period of data
exclusivity, another company nevertheless could also market another version of the product if

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such company obtained an MA based on an MAA with a complete and independent data package of pharmaceutical tests,
preclinical tests and clinical trials.

v.  European Union Orphan Designation and Exclusivity

In the EU, after a recommendation from the EMA’s Committee for Orphan Medicinal Products (“COMP”), the European
Commission may grant orphan designation to a product if (1) the product is intended for the diagnosis, prevention or
treatment of a life-threatening or chronically debilitating condition; (2) either (a) such condition affects no more than five
in 10,000 persons in the EU when the application is made, or (b) it is unlikely that the product, without the benefits derived
from orphan status, would generate sufficient return in the EU to justify the necessary investment in its development; and
(3) there exists no satisfactory method of diagnosis, prevention or treatment of such condition authorized for marketing in
the EU or, if a method exists, the product would be a significant benefit to those affected by that condition.

In the EU, orphan designation entitles a party to financial incentives such as reduction of fees or fee waivers and 10 years
of market exclusivity is granted following medicinal product approval during which time no “similar medicinal product”
may be placed on the market. A “similar medicinal product” is defined as a medicinal product containing a similar active
substance or substances as contained in an authorized orphan medicinal product, and which is intended for the same
therapeutic indication. This period may be reduced to six years if the orphan designation criteria are no longer met,
including where it is shown that the product is sufficiently profitable so as not to justify maintenance of market exclusivity.
Orphan designation must be requested before submitting an application for marketing approval. We will be required to
apply for the maintenance of the orphan designation granted to apitegromab for the treatment of SMA at the time of
applying for an MA. Orphan designation does not convey any advantage in, or shorten the duration of, the regulatory
review and approval process.

The aforementioned EU rules are generally applicable in the EEA.

vi.  Reform of the Regulatory Framework in the European Union

The European Commission introduced legislative proposals in April 2023 that, if implemented, will replace the current
regulatory framework in the EU for all medicines (including those for rare diseases and for children). The European
Commission has provided the legislative proposals to the European Parliament and the European Council for their review
and approval. In October 2023, the European Parliament published draft reports proposing amendments to the legislative
proposals, which will be debated by the European Parliament. Once the European Commission’s legislative proposals are
approved (with or without amendment), they will be adopted into EU law.

vii.  European General Data Protection Regulation

Since we conduct clinical trials in the EEA, we are subject to additional European data privacy laws. The General Data
Protection Regulation, (EU) 2016/679 (“GDPR”), became effective on May 25, 2018, and deals with the processing of
personal data and on the free movement of such data. The GDPR imposes a broad range of strict requirements on
companies subject to the GDPR, including requirements relating to having legal bases for processing personal data (such as
health and other sensitive data,) relating to identifiable individuals and transferring such information outside the EEA,
including to the U.S., providing details to those individuals regarding the processing of their personal information, keeping
personal information secure, obtaining consent of the individuals to whom the personal data relates, having data processing
agreements with third parties who process personal information, responding to individuals’ requests to exercise their rights
in respect of their personal information, reporting security breaches involving personal data to the competent national data
protection authority and affected individuals, appointing data protection officers, conducting data protection impact
assessments, and record-keeping. The GDPR increases substantially the penalties to which we could be subject in the event
of any non-compliance, including fines of up to 10,000,000 Euros or up to 2% of our total worldwide annual turnover for
certain comparatively minor offenses, or up to 20,000,000 Euros or up to 4% of our total worldwide annual turnover for
more serious offenses, whichever is greater. The GDPR also confers a private right of action on data subjects and consumer
associations to lodge complaints with supervisory authorities, seek judicial remedies, and obtain compensation for damages
resulting from violations of the GDPR. In addition, the GDPR includes restrictions on cross-border data transfers. The
GDPR may increase our responsibility and liability in relation to personal data that we process where such processing is
subject to the GDPR, and we may be required to put in place additional mechanisms to ensure compliance with the GDPR,
including as implemented by individual countries. Given the limited enforcement of the GDPR to date, we face uncertainty
as to the exact interpretation of the new requirements on our trials

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and we may be unsuccessful in implementing all measures required by data protection authorities or courts in interpretation
of the new law. Compliance with the GDPR will be a rigorous and time-intensive process that may increase our cost of
doing business or require us to change our business practices, and despite those efforts, there is a risk that we may be
subject to fines and penalties, litigation, and reputational harm in connection with our European activities.

National laws of member states of the EU are in the process of being adapted to the requirements under the GDPR, thereby
implementing national laws which may partially deviate from the GDPR and impose different obligations from country to
country, so that we do not expect to operate in a uniform legal landscape in the EEA. Also, as it relates to processing and
transfer of genetic data, the GDPR specifically allows national laws to impose additional and more specific requirements or
restrictions, and European laws have historically differed quite substantially in this field, leading to additional uncertainty.
In addition, further to the UK’s exit from the EU on January 31, 2020, the GDPR ceased to apply in the UK at the end of
the transition period on December 31, 2020. However, as of January 1, 2021, the UK’s European Union (Withdrawal) Act
2018 incorporated the GDPR (as it existed on December 31, 2020 but subject to certain UK specific amendments) into UK
law, referred to as the UK GDPR. The UK GDPR and the UK Data Protection Act 2018 set out the UK’s data protection
regime, which is independent from but aligned to the EU’s data protection regime. The UK has announced plans to reform
the country’s data protection legal framework in its Data Reform Bill, but these have been put on hold. Non-compliance
with the UK GDPR may result in monetary penalties of up to £17.5 million or 4% of worldwide revenue, whichever is
higher. Although the UK is regarded as a third country under the EU’s GDPR, the EC has now issued a decision
recognizing the UK as providing adequate protection under the EU GDPR and, therefore, transfers of personal data
originating in the EU to the UK remain unrestricted. Like the EU GDPR, the UK GDPR restricts personal data transfers
outside the UK to countries not regarded by the UK as providing adequate protection. The UK government has confirmed
that personal data transfers from the UK to the EEA remain free flowing.

In the event we continue to conduct clinical trials in the EEA, we must also ensure that we maintain adequate safeguards to
enable the transfer of personal data outside of the EEA, in particular to the U.S., in compliance with European data
protection laws. In the past, companies in the U.S. were able to rely upon the EU-U.S. Privacy Shield framework to
legitimize data transfers from the EU the U.S. In July 2020, the Court of Justice of the European Union (“CJEU”) in Case
C-311/18 (Data Protection Commissioner v Facebook Ireland and Maximillian Schrems [“Schrems II”]) invalidated the
EU-U.S. Privacy Shield on the grounds that the Privacy Shield failed to offer adequate protections to EU personal data
transferred to the U.S. The CJEU, in the same decision, deemed that the Standard Contractual Clauses (“SCCs”) published
by the European Commission (“EC”) are valid. However, the CJEU ruled that transfers made pursuant to the SCCs need to
be assessed on a case-by-case basis to ensure the law in the recipient country provides “essentially equivalent” protections
to safeguard the transferred personal data as the EU, and required businesses to adopt supplementary measures if such
standard is not met. Subsequent guidance published by the European Data Protection Board in June 2021 described what
such supplementary measures must be, and stated that businesses should avoid or cease transfers of personal data if, in the
absence of supplementary measures, equivalent protections cannot be afforded. On June 4, 2021, the EC issued new forms
of standard contractual clauses for data transfers from controllers or processors in the EU/EEA (or otherwise subject to the
GDPR) to controllers or processors established outside the EU/EEA (and not subject to the GDPR). The new standard
contractual clauses replace the standard contractual clauses that were adopted previously under the EU Data Protection
Directive. The UK is not subject to the EC’s new standard contractual clauses but has published a draft version of a UK-
specific transfer mechanism, which, once finalized, will enable transfers from the UK. We will be required to implement
these new safeguards when conducting restricted data transfers under the EU and UK GDPR and doing so will require
significant effort and cost. On March 25, 2022, the EC and the U.S. announced to have reached a political agreement on a
new “Trans-Atlantic Data Privacy Framework”, which will replace the invalidated Privacy Shield and on December 13,
2022, the EC published a draft adequacy decision on the Trans-Atlantic Data Privacy Framework.

c.  Regulation in the United Kingdom

On June 23, 2016, the electorate in the United Kingdom voted in favor of leaving the EU, commonly referred to as Brexit,
and the UK formally left the EU on January 31, 2020. There was a transition period during which EU pharmaceutical laws
continued to apply to the UK, which expired on December 31, 2020. However, the EU and the UK have concluded a trade
and cooperation agreement (“TCA”), which was provisionally applicable since January 1, 2021 and has been formally
applicable since May 1, 2021. The TCA includes specific provisions concerning pharmaceuticals, which include the mutual
recognition of GMP, inspections of manufacturing facilities for medicinal products and GMP documents issued, but does
not provide for wholesale mutual recognition of UK and EU pharmaceutical regulations. At

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present, Great Britain has implemented EU legislation on the marketing, promotion and sale of medicinal products through
the Human Medicines Regulations 2012 (as amended) (under the Northern Ireland Protocol, the EU regulatory framework
currently still applies in Northern Ireland). The regulatory regime in Great Britain therefore currently aligns in many
respects with EU regulations, however it is possible that these regimes will diverge in the future now that Great Britain’s
regulatory system is independent from the EU and the TCA does not provide for mutual recognition of UK and EU
pharmaceutical legislation. Notwithstanding that there is no wholesale recognition of EU pharmaceutical legislation under
the TCA, under a new international recognition procedure which was put in place by the Medicines and Healthcare
products Regulatory Agency (“MHRA”), the UK medicines regulator, on January 1, 2024, the MHRA may take into
account decisions on the approval of an MA from the EMA (and certain other regulators) when considering an application
for a Great Britain MA.

On February 27, 2023, the UK government and the European Commission announced a political agreement in principle to
replace the Northern Ireland Protocol with a new set of arrangements, known as the “Windsor Framework”. This new
framework fundamentally changes the existing system under the Northern Ireland Protocol, including with respect to the
regulation of medicinal products in the UK. In particular, the MHRA will be responsible for approving all medicinal
products destined for the UK market (i.e., Great Britain and Northern Ireland), and the EMA will no longer have any role
in approving medicinal products destined for Northern Ireland. A single UK-wide MA will be granted by the MHRA for all
medicinal products to be sold in the UK, enabling products to be sold in a single pack and under a single authorization
throughout the UK. The Windsor Framework was approved by the EU-UK Joint Committee on March 24, 2023, so the UK
government and the EU will enact legislative measures to bring it into law. On June 9, 2023, the MHRA announced that the
medicines aspects of the Windsor Framework will apply from January 1, 2025.

i.  Clinical Trials 

The UK has implemented the now repealed Clinical Trials Directive 2001/20/EC into national law through the Medicines
for Human Use (Clinical Trials) Regulations 2004 (as amended). However, the MHRA published details of its legislative
proposals designed to improve and strengthen the UK clinical trials legislation on March 21, 2023. The legislative
proposals were published in response to a consultation which ran from January 17, 2022 until March 14, 2022. The MHRA
will now work with lawyers to draft such new legislation.

ii.  Orphan Designation

Since January 1, 2021, a separate process for orphan designation to the EU process has been applied to Great Britain. There
is now no pre-marketing authorization orphan designation (as there is in the EU) in Great Britain and the application for
orphan designation will be reviewed by the MHRA at the time of an application for a UK or Great Britain MA. The criteria
for orphan designation remain the same as in the EU, except that they apply to Great Britain only (e.g., there must be no
satisfactory method of diagnosis, prevention or treatment of the condition in Great Britain, as opposed to the EU).

d.  Rest of the World Regulation

For other countries outside of the UK, the EU and the U.S., such as countries in Eastern Europe, Latin America or Asia, the
requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary from country to
country. Additionally, the clinical trials must be conducted in accordance with GCP requirements and the applicable
regulatory requirements and the ethical principles that have their origin in the Declaration of Helsinki.

e.  Additional Laws and Regulations Governing International Operations

If we further expand our operations outside of the U.S., we must dedicate additional resources to comply with numerous
laws and regulations in each jurisdiction in which we plan to operate. The Foreign Corrupt Practices Act (“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 U.S. 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.

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Compliance with the FCPA 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 U.S., 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. If we expand our presence outside of the U.S., it will require us to dedicate
additional resources to comply with these laws, and these laws may preclude us from developing, manufacturing, or selling
certain products and product candidates outside of the U.S., 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 civil and criminal
penalties and suspension or debarment from government contracting. The U.S. Securities and Exchange Commission
(“SEC”) also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA’s accounting
provisions.

XIII.

Coverage and Reimbursement

Government authorities and other third-party payors, such as private health insurers and health maintenance organizations,
decide which drugs and treatments they will cover and the amount of reimbursement. In the United States, the principal
decisions about reimbursement for new medicines are typically made by CMS, an agency within the U.S. Department of
Health and Human Services. CMS decides whether and to what extent a new medicine will be covered and reimbursed
under Medicare and private payors tend to follow CMS to a substantial degree.

Coverage and reimbursement by a third-party payor may depend upon a number of factors, including the third-party
payor’s determination that use of a product is (i) a covered benefit under its health plan; (ii) safe, effective and medically
necessary; (iii) appropriate for the specific patient; (iv) cost-effective; and (v) neither experimental nor investigational.

In the U.S. no uniform policy of coverage and reimbursement for drugs or biological products exists, and one payor’s
determination to provide coverage and adequate reimbursement for a product does not assure that other payors will make a
similar determination. Accordingly, decisions regarding the extent of coverage and amount of reimbursement to be
provided for any of our products candidates, if approved, will be made on a payor by payor basis. The level of coverage
and reimbursement for products can differ significantly from payor to payor. One payor’s decision to cover a particular
medical product or service does not ensure that other payors will also provide coverage for the medical product or service,
or will provide coverage at an adequate reimbursement rate. The coverage determination process may be a time consuming
and costly process that will require us to provide scientific and clinical support for the use of our products to each payor
separately, with no assurance that coverage and adequate reimbursement will be obtained. In order to secure coverage and
reimbursement for any product that might be approved for sale, a company may need to conduct expensive
pharmacoeconomic studies in order to demonstrate the medical necessity and cost-effectiveness of the product, in addition
to the costs required to obtain FDA or other comparable regulatory approvals. Additionally, companies may also need to
provide discounts to purchasers, private health plans or government healthcare programs.

A third-party payor’s decision to provide coverage for a product does not imply that an adequate reimbursement rate will
be approved. The containment of healthcare costs has become a priority of federal, state and foreign governments and
payors, and the prices of products 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 payor 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 regulatory

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approval, less favorable coverage policies and reimbursement rates may be implemented in the future, which could affect
physician usage and patient demand.

Additional federal programs apply to pharmaceutical companies that affect coverage and reimbursement for drug products.
For example, the Medicaid Drug Rebate Program requires pharmaceutical manufacturers to enter into and have in effect a
national rebate agreement with the Secretary of the HHS as a condition for states to receive federal matching funds for the
manufacturer’s outpatient drugs furnished to Medicaid patients. The ACA also expanded the universe of Medicaid
utilization subject to drug rebates by requiring pharmaceutical manufacturers to pay rebates on Medicaid managed care
utilization and by enlarging the population potentially eligible for Medicaid drug benefits. Pricing and rebate programs
must also comply with the Medicaid rebate requirements of the U.S. Omnibus Budget Reconciliation Act of 1990.

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

For a drug product to receive federal reimbursement under the Medicaid or Medicare Part B programs or to be sold directly
to U.S. government agencies, the manufacturer must extend discounts to entities eligible to participate in the 340B drug
pricing program. The required 340B discount on a given product is calculated based on the AMP and Medicaid rebate
amounts reported by the manufacturer. As of 2010, the ACA expanded the types of entities eligible to receive discounted
340B pricing, although, under the current state of the law, with the exception of children’s hospitals, these newly eligible
entities will not be eligible to receive discounted 340B pricing on orphan drugs. In addition, as 340B drug pricing is
determined based on AMP and Medicaid rebate data, the revisions to the Medicaid rebate formula and AMP definition
described above could cause the required 340B discount to increase.

These laws, and future state and federal healthcare reform measures may be adopted in the future, any of which 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.

In addition, in most foreign countries, the proposed pricing for a drug must be approved before it may be lawfully
marketed. The requirements governing drug pricing and reimbursement vary widely from country to country. For example,
the EU provides options for its member states to restrict the range of medicinal products for which their national health
insurance systems provide reimbursement and to control the prices of medicinal products for human use. Reference pricing
used by various EU Member States and parallel distribution, or arbitrage between low priced and high priced member
states, can further reduce prices. A member state may approve a specific price for the medicinal product or it may instead
adopt a system of direct or indirect controls on the profitability of the company placing the medicinal product on the
market. In some countries, we may be required to conduct a clinical study or other studies that compare the cost
effectiveness of any of our product candidates to other available therapies in order to obtain or maintain reimbursement or
pricing approval. Historically, products launched in the EU do not follow price structures of the U.S. and generally prices
tend to be significantly lower. Publication of discounts by third-party payors or authorities may lead to further pressure on
the prices or reimbursement levels within the country of publication and other countries.

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XIV.

Human Capital

Our employees are relentlessly focused on the discovery and development of innovative medicines in which signaling by
protein growth factors plays a fundamental role. Our people are our most important asset, embodying our values such as
discovering the joy in science, in collaboration and in making a difference in the lives of patients, families and our
communities. We are guided by our core values to create a collaborative, flexible, agile, empowering, and silo-free culture
so that we can move with speed and urgency to deliver high-impact medicines to patients with devastating diseases.

a.  Employees

As of March 1, 2024, we had 150 full-time employees, of which 111 employees are engaged in research and development
activities and 39 are engaged in general and administrative activities. All of our employees are based in the U.S. and a
majority are based in Massachusetts. In May 2022, we experienced a reduction in workforce in which 39 positions were
impacted. After the reduction in 2022, we continued to make targeted hires to enhance our capabilities. The new employees
were hired to support a variety of functions and key initiatives, including strengthening our clinical development, with
hires in various areas of clinical development and operations. We anticipate continuing to add depth and new capabilities in
key areas of our business. None of our employees is represented by a labor union or covered by a collective bargaining
agreement, and we believe our relationship with our employees is good.

b.  Career Development and Growth

We emphasize employee development and training. To empower employees to unleash their potential individually and as a
team, we invest in our employees by providing development opportunities, and the necessary resources to support their
success, including coaching, management and leadership training, presentation workshops and paid conference attendance.
The diversity of our employees and their skillsets also offers a unique opportunity for us to learn from each other’s
experiences.

c.  Compensation and Benefits

Our competitive compensation programs are designed to align the compensation of our employees with our performance
and to provide the proper incentives to attract, retain and motivate employees to achieve superior results. The structure of
our compensation programs balances incentive earnings for both short-term and long-term performance. We provide
employee salaries that are competitive within our industry based on position, skill level, experience and knowledge.
Additionally, we offer equity to each of our employees to align the interests of our employees with the company’s mission.

We are committed to providing comprehensive benefit options and it is our intention to offer benefits that will allow our
employees and their families to live healthier and more secure lives. Some examples of the benefits we offer are: medical
insurance including prescription drug benefits, dental insurance, vision insurance, accident insurance, life insurance,
disability insurance, health savings accounts, flexible spending accounts, wellness programs, access to mental health
support and benefits, identity theft insurance and pet insurance.

d.  Employee Engagement

We routinely conduct confidential employee engagement surveys to obtain feedback on a variety of topics, including
culture, values, diversity, equity and inclusion, career development, employee satisfaction and tenure, and execution of our
company strategy. These survey results are reviewed by our executive team so that we can continue to increase employee
satisfaction and improve the well-being of our employees. We value and encourage fostering mechanisms and
opportunities for two-way dialogue. We actively strive to operationalize feedback provided by employees in ways that
align with our business and culture. We are also committed to communication and transparency, using multiple forums and
channels to allow for the sharing of appropriate, timely information to all employees.

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e.  Health & Safety

Ensuring the safety and wellbeing of our employees and communities is of the utmost importance to us, particularly
following the COVID-19 pandemic. What we have seen as a result of the pandemic is that flexibility is top of mind and a
key consideration. We continue to offer daily onsite testing and masks at no cost to our employees and visitors and when
necessary, conduct internal contact tracing.

The need to provide the flexibility to work from home has refocused our work model. We’ve helped employees set up
home offices, provided them access to tools to perform their jobs remotely, provided ergonomic assessments of their
working environments, and helped them address IT connectivity. We’ve also found ways to continue to foster collaboration
and community through events like virtual trivia nights, scavenger hunts, coffee chats, charitable giving and lunch-n-learns,
that we would normally do in person.

f.  Diversity, Equity & Inclusion (“DE&I”) 

We believe that fostering diversity, equity and inclusion is a business imperative which supports and encourages
individuals to show up as their whole selves. Investing in meaningful DE&I work enhances culture and employee
experience. We are committed to creating and maintaining a diverse, equitable, inclusive, and safe work environment. As
we grow and mature, we look forward to establishing programs that infuse DE&I within the business, identify barriers that
impact recruitment, development, and retention of underrepresented employees, identify educational content, communicate
the value and impact of DE&I on goals and objectives, all while continuing to focus on hiring diverse talent at all levels of
the company. Our ability to innovate and meet people’s needs is strongest when all voices are heard and valued.

XV. Facilities

Our corporate headquarters and operations are located in Cambridge, Massachusetts.

In March 2015, we entered into a lease of laboratory and office space at 620 Memorial Drive in Cambridge, Massachusetts.
Our amended lease expired in September 2023. In October 2020, we entered into a Sublease agreement with Orna
Therapeutics, Inc. to lease this space for the period February 1, 2021 through August 31, 2023.

In November 2019, we entered into a lease of laboratory and office space at 301 Binney Street in Cambridge,
Massachusetts and in 2021 we relocated our corporate headquarters to this location. The expiration date is in August 2025
and we have the option to extend the term by two years.

We believe that our facilities at 301 Binney Street are adequate to meet our current needs, and that suitable additional space
will be available as and when needed.

XVL.  Legal Proceedings

From time to time, we may be involved in various claims and legal proceedings relating to claims arising out of our
operations. We are not currently a party to any material legal proceedings.

XVIL.  Website Access to Reports 

We are subject to the informational requirements of the Exchange Act and are required to file annual, quarterly and current
reports, proxy statements and other information with the SEC. You can read our SEC filings, including the registration
statement, at the SEC’s website at www.sec.gov. We also maintain a website at http://www.scholarrock.com. You may
access, free of charge, our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and
any amendments to those reports, as soon as reasonably practicable after such material is electronically filed with, or
furnished to, the SEC. The information that is posted on or is accessible through our website is not incorporated by
reference into this Annual Report on Form 10-K and should not be considered part of this or any other report that we file
with or furnish to the SEC.

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Item 1A. Risk Factors

Careful consideration should be given to the following risk factors, together with all other information set forth in this
Annual Report on Form 10-K (“Annual Report”), including our consolidated financial statements and related notes, and
“Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and in other documents that
we file with the Securities and Exchange Commission (the “SEC”), in evaluating Scholar Rock Holding Corporation and
our subsidiaries (collectively, the “Company”, “we”, or “our”) and our business, before investing in our common stock.
Investing in our common stock involves a high degree of risk. If any of the following risks and uncertainties actually
occurs, our business, prospects, financial condition and results of operations could be materially and adversely affected.
The market price of our common stock could decline if one or more of these risks or uncertainties were to occur, which may
cause you to lose all or part of the money you paid to buy our common stock. The risk factors described below disclose
both material and other risks, and are not intended to be exhaustive and are not the only risks facing the Company. New
risk factors can emerge from time to time, and it is not possible to predict the impact that any factor or combination of
factors may have on our business, prospects, financial condition and results of operations. Certain statements below are
forward-looking statements. See “Special Note Regarding Forward-Looking Statements” in this Annual Report.

Summary of the Material Risks Associated with Our Business

Our business is subject to numerous risks and uncertainties that you should be aware of before making an investment
decision, including those highlighted in the section entitled “Risk Factors.” These risks include, but are not limited to, the
following:

Risks Related to Product Development, Regulatory Approval and Commercialization

● Product development involves a lengthy and expensive process, with an uncertain outcome. We may incur

additional costs or experience delays in completing, or ultimately be unable to complete, the development and
commercialization of apitegromab, SRK-181, SRK-439, or any future product candidates. Many of the factors
that cause, or lead to, a delay in the initiation or completion of clinical trials may also ultimately lead to the denial
of regulatory approval or limit market acceptance of our product candidates.

● The results of preclinical studies and early-stage clinical trials may not be predictive of future results. Success of

a product candidate in an early-stage clinical trial may not be replicated in later-stage clinical trials.

● Interim, initial and preliminary results from our clinical trials that we announce or publish from time to time may
change (e.g. from positive safety or efficacy results to poor or negative safety or efficacy results) as more patient
data become available and are subject to additional audit, validation and verification procedures that could result
in material changes in the final data.

● We rely on third parties to conduct our clinical trials and to conduct certain aspects of our preclinical studies. If

these third parties do not successfully carry out their contractual duties or meet expected deadlines or comply
with legal and regulatory requirements, we may be delayed or unable to receive regulatory approval of or
commercialize apitegromab, SRK-181, SRK-439 or any future product candidates, and our business could be
materially harmed.

● We have never commercialized a product and will need to build and scale our business for potential

commercialization of apitegromab, including building our compliance, medical affairs and commercial
organizations, which, if we are not able to do so successfully could negatively impact our business, including the
potential for a successful commercialization of apitegromab.

● The regulatory approval process for our product candidates in the U.S., EU and other jurisdictions will be lengthy,
time-consuming and inherently unpredictable and we may fail to receive or be delayed in receiving regulatory
approval of apitegromab, SRK-181, SRK-439 and future product candidates.

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● We have received Orphan Drug designation from the FDA for apitegromab for the treatment of SMA and the EC

granted Orphan Medicinal Product designation to apitegromab for the treatment of SMA. We may seek Orphan
Drug designation from regulatory authorities in other jurisdictions for apitegromab and Orphan Drug designation
from the FDA, EC or regulatory authorities in other jurisdictions for our other product candidates. In any of these
instances, we may not receive the requested designation or we may be unable to realize the benefits associated
with Orphan Drug designation, including the potential for market exclusivity.

● Preclinical development is uncertain. Our preclinical programs, such as SRK-439, may experience delays or may
never advance to clinical trials, which would adversely affect our ability to develop our product pipeline and
receive regulatory approvals or commercialize these programs on a timely basis or at all, which would have an
adverse effect on our business.

Risks Related to Our Business and Operations

● Because we rely on a limited number of third-party manufacturing and supply partners, our supply of research
and development, preclinical and clinical development materials, and, if approved, commercial materials, may
become limited or interrupted or may not be of satisfactory quantity or quality.

● Our reliance on third parties, such as manufacturers, may subject us to risks relating to manufacturing scale-up

and may cause us to undertake substantial obligations, including financial obligations.

● We will need to continue to grow our organization in certain areas, including our personnel, systems and

relationships with third parties, in order to develop our drug candidates and we may experience difficulties in
managing this growth.

● Our executives and highly skilled technical and managerial personnel are critical to our business. If we have
transition in management, lose key personnel, or if we fail to recruit additional highly skilled personnel, our
ability to further develop apitegromab, SRK-181, SRK-439 and identify and develop new or next generation
product candidates may be impaired.

● Failure to comply with health care privacy and data protection laws and regulations could lead to government

enforcement actions (which could include civil or criminal penalties), private litigation, and/or adverse publicity
and could negatively affect our operation results and business.

Risks Related to Intellectual Property

● Our success depends in part on our ability to protect our intellectual property. It is difficult and costly to protect

our proprietary rights and technology, and we may not be able to ensure their protection.

● Our commercial success depends in part on our ability to develop, manufacture, market and sell our product

candidates and use our proprietary technologies without infringing the proprietary rights of third parties. Third-
party claims of intellectual property infringement may prevent or delay our product discovery, development, and
commercialization efforts.

Risks Related to Our Financial Condition and Capital Requirements

● We have incurred net losses in every year since our inception and anticipate that we will continue to incur net

losses in the future.

● We will require additional capital to fund our operations and if we fail to obtain necessary capital, we will not be
able to complete the development and commercialization of apitegromab, SRK-181, SRK-439 and any future
product candidates.

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Risks Related to Our Common Stock

● The price of our stock is volatile, and you could lose all or part of your investment.

Risks Related to Product Development, Regulatory Approval and Commercialization

Product development involves a lengthy and expensive process, with an uncertain outcome. We may incur additional
costs or experience delays in completing, or ultimately be unable to complete, the development and commercialization of
apitegromab, SRK-181, SRK-439, or any future product candidates. Many of the factors that cause, or lead to, a delay
in the initiation or completion of clinical trials may also ultimately lead to the denial of regulatory approval or limit
market acceptance of our product candidates.

Before obtaining regulatory approvals for the commercial sale of any product candidates, we must demonstrate through
extensive preclinical studies and clinical trials that our product candidates are safe and effective in humans. Clinical
development is expensive and can take many years to complete, and its outcome is inherently uncertain, a clinical trial can
fail at any stage of development. We may experience delays in initiating, progressing or completing our clinical trials. We
may be unable to establish clinical endpoints that applicable regulatory authorities would consider clinically meaningful.
Clinical trials may fail to meet their primary or secondary endpoints, raise safety concerns or generate mixed results.
Differences in trial design between early-stage clinical trials and later-stage clinical trials make it difficult to extrapolate the
results of earlier clinical trials to later clinical trials. Clinical data may not be sufficient to apply for and obtain regulatory
approval on the timelines we expect or at all. Other decisions or actions of regulatory agencies may affect our plans,
progress or results.

We also may experience numerous unforeseen events during, or as a result of, any clinical trials in process or any future
clinical trials that we conduct that could delay or prevent our ability to receive marketing approval or commercialize
apitegromab, SRK-181, SRK-439, or any future product candidates, including:

● delay or inability to reach agreement with the FDA or comparable foreign regulatory authorities on acceptable

clinical trial design, conduct or statistical analysis plan;

● regulators, Institutional Review Boards (“IRBs”) or ethics committees may not authorize us or our investigators

to commence a clinical trial or conduct a clinical trial at a prospective trial site;

● we may experience delays in reaching, or fail to reach, agreement on acceptable terms with prospective trial sites
and prospective CROs, the terms of which can be subject to extensive negotiation and may vary significantly
among different CROs and trial sites;

● failure by our collaborators to provide us with an adequate and timely supply of product that complies with the

applicable quality and regulatory requirements for a combination trial;

● collaborators may provide insufficient funding for a clinical trial program, delay or stop a clinical trial, abandon a
product candidate or clinical trial program, repeat or conduct new clinical trials or require a new formulation of a
drug candidate for clinical testing;

● clinical trials of any product candidates may fail to show safety and effectiveness, or produce negative or

inconclusive results and we may decide, or regulators may require us, to conduct additional preclinical studies or
clinical trials or we may decide to abandon product development programs;

● the number of subjects required for clinical trials of any product candidates may be larger than we anticipate,

enrollment in these clinical trials may be slower or more challenging than we anticipate or subjects may drop out
of these clinical trials or fail to return for post treatment follow-up at a higher rate than we anticipate;

● challenges in identifying or recruiting sufficient study sites or investigators for clinical trials;

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● our third-party contractors may fail to comply with regulatory requirements or meet their contractual obligations

to us in a timely manner, or at all;

● clinical study sites or clinical investigators may deviate from the clinical trial protocol or drop out of the trial,

which may require that we add new clinical trial sites or investigators;

● we may elect to, or regulators, IRBs or ethics committees may require that we or our investigators, suspend or

terminate clinical research or trials for various reasons, including noncompliance with regulatory requirements or
a finding that the participants are being exposed to unacceptable health risks;

● limitations on our or our CROs’ ability to access and verify clinical trial data captured at clinical study sites

through monitoring and source document verification;

● the cost of clinical trials of a product candidate may be greater than we anticipate;

● the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our

product candidates may be insufficient or inadequate to initiate or complete a given clinical trial;

● our product candidates may have undesirable side effects or other unexpected characteristics, causing us or our

investigators, regulators, IRBs or ethics committees to suspend or terminate the trials, or reports from clinical
testing of other therapies may raise safety or efficacy concerns about our product candidates;

● our product candidates may have undesirable side effects or other unexpected characteristics when used in a new
disease indication or with products in a different class which may raise safety, efficacy or other concerns about
our product candidate as a potential therapy in that new disease indication or other indications or its use with
products in a different class;

● our failure to establish an appropriate safety profile for a product candidate based on clinical or preclinical data

for such product candidate and/or data emerging from other molecules in the same class as our product candidate;

● the FDA, EMA or other regulatory authorities may require us to submit additional data such as long-term
toxicology studies, or change or impose other requirements before permitting us to initiate a clinical trial;

● evolution in the standard of care or changes in applicable governmental regulations or policies during the

development of a product candidate that require amendments to ongoing clinical trials and/or the conduct of
additional preclinical studies or clinical trials; and

● lack of adequate funding to complete a clinical trial.

Many of the factors that cause, or lead to, a delay in the initiation or completion of clinical trials may also ultimately lead
to the denial of regulatory approval or limit market acceptance of our product candidates. For example, we anticipate some
of our future trials to, in part, utilize an open-label trial design, and our ongoing Phase 1 DRAGON clinical trial for SRK-
181 in cancer immunotherapy and our ongoing ONYX long-term extension study for apitegromab in patients from both the
TOPAZ and SAPPHIRE trials, utilize an open-label trial design. An open-label trial is one where both the patient and
investigator know whether the patient is receiving the test article or either an existing approved drug or placebo. Open-
label trials are subject to various limitations that may exaggerate any therapeutic effect as patients in open-label studies are
aware that they are receiving treatment. Open-label trials may be subject to a patient bias, for example, if patients perceive
their symptoms to have improved merely due to their awareness of receiving an experimental treatment. Open-label trials
also may be subject to an investigator bias where those assessing and reviewing the physiological outcomes of the clinical
trials are aware of which patients have received treatment and may interpret the information of the treated group more
favorably given this knowledge. The potential sources of bias in clinical trials as a result of open-label design may not be
adequately mitigated and may cause any of our trials that utilize

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such design to fail and additional trials may be necessary to support future marketing applications. In addition, other types
of trials (including randomized, double-blind, parallel arm studies), particularly if smaller in size or if limited to one study,
are also subject to potential sources of bias and limitations that may exaggerate any therapeutic effect or falsely identify a
positive efficacy signal, or conversely, fail to detect an efficacy signal when in fact there may actually be a positive
therapeutic effect. Furthermore, we are conducting clinical trials with apitegromab in SMA, but by using apitegromab in a
Phase 2 obesity clinical trial, we may become aware of safety information associated with apitegromab that we did not
observe when we used apitegromab in our clinical trials in SMA. We, the FDA, the competent authorities and/or ethics
committees of the EU Member States or other applicable regulatory authorities for their jurisdictions, or an IRB for their
site(s) may suspend clinical trials of a product candidate at any time for various reasons, including a belief that subjects or
patients in such trials are being exposed to unacceptable health risks or adverse side effects.

Our product development costs will increase if we experience delays in clinical testing or marketing approvals. We do not
know whether any of our clinical trials will begin as planned, will need to be restructured or will be completed on schedule,
or at all. Significant clinical trial delays could also shorten any periods during which we may have the exclusive right to
commercialize our product candidates and may allow our competitors to bring products to market before we do, potentially
impairing our ability to successfully commercialize our product candidates and harming our business and results of
operations. Any delays in our clinical development programs may harm our business, financial condition and results of
operations significantly.

Our clinical development strategy depends on the continued use and availability of certain third-party approved drug
therapies.

Apitegromab and SRK-181 are our two clinical-stage product candidates. Patients in our Phase 3 SAPPHIRE clinical trial,
and ONYX, our long-term extension study for patients from both the TOPAZ and SAPPHIRE studies, are receiving
apitegromab in conjunction with an approved SMN therapy. These patients are reliant on the continued use and availability
of such therapies. If access to an approved SMN therapy such as nusinersen or risdiplam becomes limited or is unavailable,
we may be forced to pause or stop our SAPPHIRE or ONYX long-term extension trials, or the medical condition of
patients may be affected which could negatively affect the efficacy and safety results for apitegromab in the trials or reduce
the amount of data or confound the data from these trials. We plan to initiate a Phase 2 proof-of-concept trial of
apitegromab in combination with approved GLP-1 RA in obesity. This study will rely upon the continued availability of
such GLP-1 RA. Access to approved GLP-1 RAs are limited for use in clinical trials and may continue to be limited for
such use. If GLP-1 RAs become more limited or unavailable, we may be unable to enroll, or may be delayed in enrolling
patients, or may be forced to stop our Phase 2 study. While we have obtained substantial supply of an approved GLP-1 RA
for use in this Phase 2 study, we cannot assure you that we will be able to obtain adequate supply for future studies of our
product candidate in obesity. Patients in Part B of our ongoing Phase 1 DRAGON clinical trial of SRK-181 in patients with
locally advanced or metastatic solid tumors that exhibit resistance to anti-PD-(L)1 antibody therapies are receiving SRK-
181 in conjunction with an approved anti-PD-(L)1 therapy such as pembrolizumab. If access to the approved anti-PD-(L)1
therapy becomes limited or is unavailable, we may not be able to enroll, or may be delayed in enrolling patients or may be
forced to pause or stop our Phase 1 DRAGON clinical trial, or the medical condition of patients may be affected which
could negatively affect the efficacy and safety results for SRK-181 in the trial. Any delay or suspension of our clinical
trials would significantly and delay our clinical development programs and harm our business, financial condition and
results of operations.

The results or success of preclinical studies and early-stage clinical trials of our product candidates may not be
predictive of future results or replicated in later preclinical studies or clinical trials of our product candidates in the
same indications or other indications.

The results or success of preclinical studies and early-stage clinical trials of our product candidates may not be predictive
of future results or replicated in later preclinical studies or later-stage clinical trials. Preclinical studies and early-stage
clinical trials are primarily designed to study PK and PD, understand the side effects of product candidates, and evaluate
various doses and dosing schedules. Our current or future product candidates may demonstrate different chemical,
biological and pharmacological properties in patients than they do in laboratory studies or may interact with human
biological systems in unforeseen or harmful ways. Product candidates in later-stages of clinical trials may fail to show
desired pharmacological properties or produce positive safety and efficacy results despite having progressed through

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preclinical studies and early-stage clinical trials. We completed a Phase 1 clinical trial for apitegromab in healthy adult
volunteers and we completed the treatment period of our Phase 2 TOPAZ clinical trial for the treatment of patients with
Type 2 and Type 3 SMA. In June 2023, we announced data from the Phase 2 TOPAZ trial extension period evaluating
patient outcomes at 36 months of treatment with apitegromab. These data show that continued treatment with apitegromab
over the extended period was associated with substantial and sustained improvement in motor function, and patient-
reported outcomes in patients with nonambulatory Types 2 and 3 SMA receiving SMN therapy. Results on safety, efficacy
and patient-reported outcomes such as fatigue, mobility and activities of daily living from TOPAZ were presented at the
2023 Cure SMA Research & Clinical Care Meeting. In January 2022, we initiated our Phase 3 SAPPHIRE clinical trial of
apitegromab for the treatment of patients with Type 2 and Type 3 SMA and in September 2023, we announced completion
of trial enrollment. We expect the top-line data readout for the SAPPHIRE trial in the fourth quarter of 2024. We also
announced in October 2023 our plans to expand into cardiometabolic disorders based on preclinical data with SRK-439,
and our intent to initiate a Phase 2 proof-of-concept trial of apitegromab in combination with a GLP-1 receptor agonist in
obesity in mid-2024 with data readout expected in mid-2025. We cannot assure you that the Phase 3 SAPPHIRE clinical
trial or any other future clinical trials of apitegromab, such as our planned Phase 2 clinical trial in obesity, or of SRK-439
will show positive results. Additionally, product candidates evaluated in one disease indication may interact in unforeseen
or harmful ways in a patient population with a different disease indication than was previously studied. For example, we
are evaluating apitegromab in SMA, and plan to initiate a Phase 2 clinical trial of apitegromab in obesity. Apitegromab
may interact in unforeseen or different ways in the obesity population than in the SMA patient population. There can be no
assurance that any of our current or planned clinical trials will ultimately be successful or support further clinical
development of any of our product candidates. There can also be no assurance that any of our future clinical trials will
show similar results to our earlier clinical trials or support further development or registration of any of our product
candidates.

Interim, initial, or preliminary results from our clinical trials that we announce or publish from time to time may
change (e.g. from positive safety or efficacy results to poor or negative safety or efficacy results) as more patient data
become available and are subject to additional audit, validation and verification procedures that could result in material
changes in the final data.

From time to time, we may publish interim, initial, or preliminary data, including interim top-line results or initial or
preliminary results from our clinical trials. Any interim, initial or preliminary data and other results from our clinical trials
may materially change as more patient data become available. Preliminary, initial, interim or top-line results also remain
subject to audit, validation and verification procedures that may result in the final data being materially different from the
interim, initial or preliminary data we previously published. As a result, interim, initial or preliminary data may not be
predictive of final results and should be viewed with caution until the final data are available. We may also arrive at
different conclusions, or considerations may qualify such results, once we have received and fully evaluated additional
data. For example, clinical data from Part A and Part B of our Phase 1 DRAGON trial in cancer immunotherapy, including
preliminary safety and efficacy results, were presented at the European Society for Medical Oncology Targeted Anticancer
Therapies Congress in March 2023. Safety, efficacy and biomarker data were presented in November 2023 at the SITC
38th Annual Meeting, and we will continue to present data from our Phase 1 DRAGON trial while the trial is ongoing.
Tumor response data is based on assessments by site investigators. Central reads for the tumor responses are also being
conducted, with a comprehensive review of the central reads to be performed once completed within and/or across the
cohorts. Differences between preliminary, initial or interim data and final data could adversely affect our business.

There is a high failure rate for drugs and biologics proceeding through clinical trials. A number of companies in the
pharmaceutical and biotechnology industries have suffered significant setbacks in late-stage clinical development even
after achieving promising results in earlier studies, and we cannot be certain that we will not face similar setbacks. Many
drugs have failed to replicate efficacy and safety results in larger or more complex later stage trials. Moreover, preclinical
and clinical data are often susceptible to varying interpretations and analyses, and many companies that believed their
product candidates performed satisfactorily in preclinical studies and clinical trials nonetheless failed to obtain regulatory
approval. If we fail to produce positive results in our ongoing and planned preclinical studies and clinical trials in
apitegromab, SRK-181, SRK-439 or if a regulatory authority interprets and analyzes the results as not positive, the
development timeline and regulatory approval and commercialization prospects for our product candidates, and,
correspondingly, our business and financial prospects, may be materially adversely affected.

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If we encounter difficulties enrolling patients in our clinical trials, our clinical development activities could be delayed
or otherwise adversely affected.

We may experience difficulties in patient enrollment in our clinical trials for a variety of reasons. The timely completion of
clinical trials in accordance with their protocols depends, among other things, on our ability to enroll a sufficient number of
patients who remain in the trial until its conclusion. The enrollment of patients depends on many factors, including:

● the patient eligibility and exclusion criteria defined in the protocol;

● the size of the patient population required for analysis of the trial’s primary endpoints;

● the willingness or availability of patients to participate in our trials;

● the number and location of participating trial sites;

● the proximity of patients to trial sites and any limitations on travel or access to trial sites;

● the design of the trial;

● our ability to recruit clinical trial investigators with the appropriate competencies and experience;

● clinicians’ and patients’ perceptions as to the potential advantages and risks of the product candidate being

studied in relation to other therapies;

● our ability to obtain and maintain patient consents; and

● the risk that patients enrolled in clinical trials will drop-out of the trials before completion of their involvement in

the study.

For example, we are initially developing apitegromab for the treatment of SMA, a rare disease, affecting an estimated
20,000 patients in the U.S. and Europe. As a result, we may encounter difficulties enrolling patients in our clinical trials for
apitegromab due, in part, to the small size of this patient population. In addition, our clinical trials will compete with other
clinical trials for product candidates that are in the same therapeutic areas as our product candidates, and this competition
will reduce the number and types of patients available to us, because some patients who might have opted to enroll in our
trials may instead opt to enroll in a trial being conducted by one of our competitors. Since the number of qualified clinical
investigators is limited, we expect to conduct some of our clinical trials at the same clinical trial sites that some of our
competitors use, which will reduce the number of patients who are available for our clinical trials in such clinical trial site.
Additionally, patients may opt out of participation in clinical trials in favor of treatment with FDA-approved therapies, or
therapies approved in the EU or other foreign jurisdictions.

Delays in patient enrollment may result in increased costs or may affect the timing or outcome of our future clinical trials,
which could prevent completion of these trials and adversely affect our ability to advance the development of our product
candidates.

We rely on third parties to conduct our clinical trials and certain aspects of our preclinical studies. If these third parties
do not successfully carry out their contractual duties or meet expected deadlines or comply with legal and regulatory
requirements, we may be delayed or unable to receive regulatory approval of or commercialize apitegromab, SRK-181,
SRK-439, or any future product candidates, and our business could be materially harmed.

We depend upon third parties to conduct certain aspects of our preclinical studies and to conduct our clinical trials, under
agreements with universities, medical institutions, CROs, strategic partners and others. We often have to negotiate

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budgets and contracts with such third parties, and if we are unsuccessful or if the negotiations take longer than anticipated,
this could result in delays to our development timelines and increased costs.

We rely especially heavily on third parties over the course of our clinical trials, and, as a result, have limited control over
the clinical investigators and limited visibility into their day-to-day activities, including with respect to their individual
employment policies or compliance with the approved clinical protocol. Nevertheless, we are responsible for ensuring that
each of our trials is conducted in accordance with the applicable protocol, legal and regulatory requirements and scientific
standards, and our reliance on third parties does not relieve us of our regulatory responsibilities. We and these third parties
are required to comply with Good Clinical Practice (“GCP”) requirements, which are regulations and guidelines enforced
by the FDA and comparable foreign regulatory authorities 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
trial participants are protected. Regulatory authorities enforce these GCP requirements through periodic inspections of trial
sponsors, clinical investigators and trial sites. If we or any of these third parties fail to comply with applicable GCP
requirements, the clinical data generated in our clinical trials may be deemed unreliable and the FDA or comparable
foreign regulatory authorities may require us to suspend or terminate these trials or perform additional preclinical studies or
clinical trials before approving our marketing applications. We cannot be certain that, upon inspection, such regulatory
authorities will determine that any of our clinical trials comply with the GCP requirements. We also are required to register
ongoing clinical trials and post the results of completed clinical trials on a government-sponsored database,
ClinicalTrials.gov, within specified timeframes. Failure to do so can result in civil monetary penalties, adverse publicity
and civil and criminal sanctions. The FDA and National Institutes of Health have signaled the government’s willingness to
begin enforcing these registration and reporting requirements against non-compliant clinical trial sponsors.

Our failure or any failure by these third parties to comply with these regulations would delay the regulatory approval
process. Moreover, our business may be implicated if any of these third parties violate federal or state fraud and abuse or
false claims laws and regulations or healthcare privacy and security laws.

Any third parties conducting aspects of our preclinical studies or clinical trials will not be our employees and, except for
remedies that may be available to us under our agreements with such third parties, we cannot control whether they devote
sufficient time and resources to our preclinical studies and clinical trials. The third party CROs and clinical trial sites that
conduct our clinical trials have experienced staffing shortages and the inability of a CRO or clinical trial site to maintain
appropriate levels of competent staffing to support the demands of our clinical trials could negatively impact the execution
of our clinical trials. These third parties may also have relationships with other commercial entities, including our
competitors, for whom they may also be conducting clinical trials or other product development activities, which could
affect their performance on our behalf. If these third parties do not successfully carry out their contractual duties or
obligations or meet expected deadlines if they need to be replaced or if the quality or accuracy of the preclinical or clinical
data they obtain is compromised due to the failure to adhere to our protocols or regulatory requirements or for other
reasons, our development timelines, including clinical development timelines, may be extended, delayed or terminated and
we may not be able to complete development of, receive regulatory approval of or successfully commercialize our product
candidates. As a result, our financial results and the commercial prospects for our product candidates would be harmed, our
costs could increase and our ability to generate revenue could be delayed.

If any of our relationships with these third-party CROs or others terminate, we may not be able to enter into arrangements
with alternative CROs or other third parties or to do so on commercially reasonable terms. Switching or adding additional
CROs involves additional cost and requires management time and focus. In addition, there is a natural transition period
when a new CRO begins work. As a result, delays may occur, which can materially impact our ability to meet our desired
development timelines. Though we carefully manage our relationships with our CROs, there can be no assurance that we
will not encounter similar challenges or delays in the future or that these delays or challenges will not have a material
adverse impact on our business, financial condition and prospects.

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We have never commercialized a product and will need to build and scale our business for potential commercialization
of apitegromab, including building our compliance, medical affairs and commercial organizations, which, if we are not
able to do so successfully could negatively impact our business, including the potential for a successful
commercialization of apitegromab.

Although we are preparing our commercialization capabilities in anticipation of a potential approval and commercial
launch of apitegromab, we have no prior sales or distribution experience and limited capabilities for marketing and market
access. We expect to invest significant financial and management resources over time to establish compliance, medical
affairs and commercial organizations for the marketing, sales and distribution of apitegromab, if approved, and other
capabilities and infrastructure to support commercial operations. If we are unable to establish these commercial capabilities
and infrastructure in a timely manner or to enter into agreements with third parties to market, sell, and/or distribute
apitegromab if approved, we may be unable to complete a successful commercial launch. To the extent we enter into
agreements with third parties, the revenue we receive may depend upon the efforts of such third parties, over which we
may have limited or no control, and our revenue from product sales may be lower than if we had commercialized the
products ourselves. We also face competition in our search for third parties to assist us with the distribution, sales and
marketing of our products.

Furthermore, we intend to commercialize apitegromab globally, if approved. In order to do so, we must build, on a
territory-by-territory basis, marketing, sales, distribution, managerial and other capabilities or make arrangements with
third parties to perform these services, and we may not be successful in doing so.

The regulatory approval process for our product candidates in the U.S., EU and other jurisdictions will be lengthy, time-
consuming and inherently unpredictable and we may fail to receive or be delayed in receiving regulatory approval of
apitegromab, SRK-181, SRK-439 and future product candidates.

The research, testing, manufacturing, labeling, approval, sale, import, export, marketing, promotion and distribution of
drug products, including biologics, are subject to extensive regulation by the FDA in the U.S. and other regulatory
authorities outside the U.S. We are not permitted to market any biological product in the U.S. until we receive a biologics
license from the FDA. We have not previously submitted a BLA to the FDA or similar marketing application to
comparable foreign authorities. A BLA must include extensive preclinical and clinical data and supporting information to
establish that the product candidate is safe, pure and potent for each desired indication. FDA approval of a new biologic or
drug generally requires dispositive data from two (and in some cases, one) adequate and well-controlled pivotal Phase 3
clinical trials of the biologic or drug in the relevant patient population. The FDA, EMA or comparable foreign regulatory
authorities may disagree with the design or implementation of our clinical trials, the results of our clinical trials may not
meet the level of statistical significance or amount of data required for approval, we may be unable to demonstrate that our
product candidates’ clinical and other benefits outweigh their safety risks, or may disagree with our analysis or
interpretation of data from preclinical studies or clinical trials. A BLA must also include significant information regarding
the chemistry, manufacturing, and controls for the product, and the manufacturing facilities must complete a successful pre-
license inspection as well as certain key clinical sites conducting our clinical trials. The FDA, EMA or comparable foreign
regulatory authorities may fail to approve the manufacturing processes or facilities of third-party manufacturers with which
we contract for clinical and commercial supplies.

The FDA may seek independent advice from a panel of experts, referred to as an Advisory Committee, on complex or
novel issues that may be presented in an application, including issues related to the adequacy of the safety and efficacy data
to support approval. The opinion of the Advisory Committee, although not binding, may have a significant impact on our
ability to receive approval of any product candidates that we develop based on the completed clinical trials.

Further, a clinical trial may be suspended or terminated by us, the IRBs for the institutions at which such trials are being
conducted, or the FDA, the competent authorities and/or ethics committees of the EU Member States or other regulatory
authorities, or recommended for suspension or termination by the DSMB for such trial, due to a number of factors,
including failure to conduct the clinical trial in accordance with regulatory requirements or our clinical protocols,
inspection of the clinical trial operations or trial site by the FDA, EMA, competent authorities of the EU Member States or
other regulatory authorities resulting in the imposition of a clinical hold, unforeseen safety issues or adverse side effects,
failure to demonstrate a benefit from using a product candidate, changes in governmental regulations or

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administrative actions or lack of adequate funding to continue the clinical trial. If we experience termination of, or delays
in the completion of, any clinical trial of our product candidates, the prospects for regulatory approval and commercial
prospects for our product candidates will be harmed, and our ability to generate product revenue will be delayed. In
addition, any delays in completing any clinical trials will increase our costs, slow down our product development and
approval process and jeopardize our ability to commence product sales and generate revenue.

We have received Orphan Drug designation from the FDA for apitegromab for the treatment of SMA and the EC
granted Orphan Medicinal Product designation to apitegromab for the treatment of SMA. We may seek Orphan Drug
designation from regulatory authorities in other jurisdictions for apitegromab and Orphan Drug designation from the
FDA, EC or regulatory authorities in other jurisdictions for our other product candidates. In any of these instances, we
may not receive the requested designation or we may be unable to realize the benefits associated with Orphan Drug
designation, including the potential for market exclusivity.

We have received Orphan Drug designation from the FDA for apitegromab for the treatment of SMA, and following the
EMA’s COMP’s positive opinion, the EC designated apitegromab as an orphan medicinal product for the treatment of
SMA. Even if we receive orphan drug exclusivity, the benefit of that exclusivity may be limited if we seek approval for an
indication broader than the orphan-designated indication or could be revoked under certain circumstances, for example if
the FDA later determines that the request for designation was materially defective or that we are unable to assure sufficient
quantities of the product to meet the needs of patients with the rare disease or condition. Further, even if we receive orphan
drug exclusivity for a product, that exclusivity may not effectively protect the product from competition during the
exclusivity period because different drugs with different active moieties can be approved for the same condition, and the
same product can be approved for different uses. Also, in the U.S., even after an orphan drug is approved and receives
orphan drug exclusivity, the FDA may subsequently approve another drug for the same condition if the FDA concludes that
the latter drug is not the same drug, including because it has been shown to be clinically superior to the drug with
exclusivity because it is safer, more effective or makes a major contribution to patient care. In the EU, a marketing
authorization may be granted to a similar medicinal product to an authorized orphan product for the same orphan indication
if:

● the second applicant can establish in its application that its medicinal product, although similar to the orphan

medicinal product already authorized, is safer, more effective or otherwise clinically superior; or

● the holder of the marketing authorization for the original orphan medicinal product consents to a second orphan

medicinal product application; or

● the holder of the marketing authorization for the original orphan medicinal product cannot supply sufficient

quantities of orphan medicinal product.

● See the sections of this Annual Report on Form 10-K for the fiscal year ended December 31, 2023 entitled, 

“Business — Government Regulation — US Biological Product Development  — Orphan Drug Designation” and 
“Business – Government Regulation – European Union Drug Development  — European Union Orphan 
Designation and Exclusivity.”

We have received Rare Pediatric Disease designation for apitegromab for the treatment of SMA. However, a marketing
application for apitegromab, if approved, may not meet the eligibility criteria for a rare pediatric disease priority review
voucher.

We have received Rare Pediatric Disease designation for apitegromab for the treatment of SMA. Designation of a biologic
as a product for a rare pediatric disease does not guarantee that a BLA for such biologic will meet the eligibility criteria for
a rare pediatric disease priority review voucher at the time the application is approved. Under the Federal Food, Drug, and
Cosmetic Act (“FDCA”), we will need to request a rare pediatric disease priority review voucher in our original BLA for
apitegromab. The FDA may determine that a BLA for apitegromab, if approved, does not meet the eligibility criteria for a
rare pediatric disease priority review voucher, including for the following reasons:

● SMA no longer meets the definition of a rare pediatric disease;

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● apitegromab contains an active ingredient (including any ester or salt of the active ingredient) that has been

previously approved in an application;

● the BLA is not deemed eligible for priority review;

● the BLA does not rely on clinical data derived from studies examining a pediatric population and dosages of the

drug intended for that population; or

● the BLA seeks approval for a different adult indication than the rare pediatric disease for which apitegromab is

designated.

The authority for the FDA to award rare pediatric disease priority review vouchers for biologics after September 30, 2024
is currently limited to biologics that receive Rare Pediatric Disease designation on or prior to September 30, 2024, and the
FDA may only award rare pediatric disease priority review vouchers through September 30, 2026. If the BLA for
apitegromab is not approved on or prior to September 30, 2026 for any reason, it will not be eligible for a priority review
voucher. However, it is possible the authority for the FDA to award rare pediatric disease priority review vouchers will be
further extended by Congress.

We have received Fast Track designation from the FDA and PRIME designation from the EMA for apitegromab for the
treatment of SMA. We may seek Fast Track designation from the FDA, or Breakthrough Therapy designation or
PRIME designation from the EMA for certain of our current and future product candidates, and we may not be
successful in receiving such designations, or if received, such designation may not actually lead to a faster development
or regulatory review or approval process.

We may seek Fast Track designation, Breakthrough Therapy designation or PRIME designation for certain of our product
candidates.

In May 2021, the FDA granted Fast Track designation for apitegromab for the treatment of SMA. The FDA has broad
discretion whether or not to grant this designation, so even if we believe a particular product candidate is eligible for this
designation, we cannot assure that the FDA would decide to grant it. Although the FDA has granted Fast Track designation
for apitegromab in SMA, 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.

Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe one of our 
product 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 product 
candidate may not result in a faster development process, review or approval compared to products 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 product candidates qualify as breakthrough therapies, the FDA may later decide that the products no longer meet the 
conditions for qualification and rescind the breakthrough designation. See the sections of this Annual Report on Form 10-K 
for the fiscal year ended December 31, 2023 entitled, “Business — Government Regulation — US Biological Product 
Development  — Expedited Development and Review Programs.”

In March 2021, the EMA granted PRIME designation to apitegromab for the treatment of SMA. PRIME is a scheme
provided by the EMA to enhance support for the development of medicines that target an unmet medical need. The receipt
of PRIME designation for apitegromab for the treatment of SMA may not result in a faster development process, review or
approval compared to products considered for approval under conventional regulatory agency procedures and does not
assure ultimate approval by the EMA.

See the section of this Annual Report on Form 10-K for the fiscal year ended December 31, 2023 entitled, “Business – 
Government Regulation – European Union Drug Development  — European Union Expedited Review and Development.”

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Receiving and maintaining regulatory approval of our product candidates in one jurisdiction does not mean that we will
be successful in receiving or maintaining regulatory approval of our product candidates in other jurisdictions.

Receiving and maintaining regulatory approval of our product candidates in one jurisdiction does not guarantee that we
will be able to receive or maintain regulatory approval in any other jurisdiction, but a failure or delay in receiving
regulatory approval in one jurisdiction may have a negative effect on the regulatory approval process in other jurisdictions.
Even if the FDA grants marketing approval of a product candidate, the EC, the competent authorities of EU Member States
or comparable regulatory authorities in foreign jurisdictions may not approve the manufacturing, marketing and promotion
of the product candidate in other countries. Approval procedures vary among jurisdictions and can involve requirements
and administrative review periods different from, and greater than, those in the U.S., including additional preclinical
studies or clinical trials, as clinical trials conducted in one jurisdiction may not be accepted by regulatory authorities in
other jurisdictions. In many jurisdictions outside the U.S., a product candidate must be approved for reimbursement before
it can be approved for sale in that jurisdiction. In some cases, the price that we intend to charge for our products is also
subject to approval.

We may also submit marketing applications in other countries. Regulatory authorities in jurisdictions outside of the U.S.
have requirements for approval of product candidates with which we must comply prior to marketing in those jurisdictions.
Receiving foreign regulatory approvals and compliance with foreign regulatory requirements could result in significant
delays, difficulties and costs for us and could delay or prevent the introduction of our products in certain countries. If we
fail to comply with the regulatory requirements in international markets and/or receive applicable marketing approvals, our
target market will be reduced and our ability to realize the full market potential of our product candidates will be harmed.

Even if we receive regulatory approval of any product candidates, we will be subject to ongoing regulatory obligations
and continued regulatory review, which may result in significant additional expense and we may be subject to penalties
if we fail to comply with regulatory requirements or experience unanticipated problems with our product candidates.

If any of our product candidates are approved, they will be subject to ongoing regulatory requirements, including
requirements related to manufacturing, labeling, packaging, storage, advertising, promotion, sampling, record-keeping,
import, export, conduct of post-marketing studies and submission of safety, efficacy and other post-marketing information.
In addition, we will be subject to continued compliance with current Good Manufacturing Practice (“cGMP”) and GCP
requirements for any clinical trials that we conduct post-approval.

Manufacturers and manufacturers’ facilities are required to comply with extensive FDA, EU and comparable foreign
regulatory authority requirements, including ensuring that quality control and manufacturing procedures conform to cGMP
regulations. As such, we and our contract manufacturers will be subject to periodic review and inspections to assess
compliance with cGMP and adherence to commitments made in any BLA or other marketing application and previous
responses to inspection observations. Accordingly, we and others with whom we work must continue to expend time,
money, and effort in all areas of regulatory compliance, including manufacturing, production and quality control.

Any regulatory approvals that we receive for our product candidates may be subject to limitations on the approved uses for
which the product may be marketed or contain requirements for potentially costly post-market testing, including Phase 4
clinical trials and surveillance to monitor the safety and efficacy of the product candidate. The FDA may also require a
REMS program as a condition of approval of our product candidates, which could entail requirements for long-term patient
follow-up, a medication guide, physician communication plans or additional elements to ensure safe use, such as restricted
distribution methods, patient registries and other risk minimization tools.

Later discovery of previously unknown problems with our product candidates, including adverse events of unanticipated
severity or frequency, or with our third-party manufacturers or 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 restrictions or other restrictions
under a REMS program. Other potential consequences include, among other things:

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● restrictions on the marketing or manufacturing of our products, withdrawal of the product from the market or

voluntary or mandatory product recalls;

● fines, warning letters, untitled letters or holds on clinical trials;

● refusal by the FDA to approve pending applications or supplements to approved applications filed by us or

suspension or revocation of license approvals;

● product seizure or detention or refusal to permit the import or export of our product candidates; and

● permanent injunctions and consent decrees, including the imposition of civil or criminal penalties.

The FDA strictly regulates marketing, labeling, advertising, and promotion of products that are placed on the market.
Products may be promoted only for their approved indications and in a manner consistent with their FDA-approved
labeling. The FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of unapproved
uses and a company that is found to have improperly promoted unapproved uses may be subject to significant liability.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or
administrative action, either in the U.S. or abroad. 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 face
enforcement action and our business may be harmed.

Even if a product candidate we develop receives marketing approval, it may fail to achieve the degree of market
acceptance by physicians, patients, third-party payors and others in the medical community necessary for commercial
success.

If apitegromab, SRK-181, SRK-439 or any future product candidate we develop receives marketing approval, whether as a
single agent or in conjunction with other therapies, it may nonetheless fail to gain sufficient market acceptance by
physicians, patients, third-party payors, and others in the medical community. For example, doctors may deem it sufficient
to treat patients with SMA with an SMN therapy such as nusinersen or risdiplam, and therefore will not be willing to utilize
apitegromab in conjunction with such SMN therapy. If the product candidates we develop do not achieve an adequate level
of acceptance, we may not generate significant product revenues and we may not become profitable. The degree of market
acceptance of any product candidate, if approved for commercial sale, will depend on a number of factors, including:

● efficacy and potential advantages compared to alternative treatments;

● the amount, scope and nature of the clinical data (and other forms of data) available;

● the ability to offer our products, if approved, for sale at competitive prices;

● convenience and ease of administration compared to alternative treatments;

● 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;

● the ability to obtain sufficient third-party coverage and adequate reimbursement; and

● the prevalence and severity of any side effects.

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Competing therapies may exist or could emerge that adversely affect the amount of revenue we are able to generate
from the sale of apitegromab, if approved, or any of our future product candidates, if successfully developed and
approved.

The biopharmaceutical industry is highly competitive. There are many public and private companies, universities,
governmental agencies and other research organizations actively engaged in the research and development of products that
may be similar to our product candidates or address similar markets. If we are successful in developing apitegromab, it is
probable that the number of companies seeking to develop products and therapies similar to our products candidates or
targeting similar indications will increase. Many of our potential competitors, alone or with their strategic partners, have
substantially greater financial, technical and human resources than we do, and significantly greater experience in the
discovery and development of product candidates, obtaining FDA and other regulatory approvals of treatments and the
commercialization of those treatments. Mergers and acquisitions in the biotechnology and pharmaceutical industries may
result in even more resources being concentrated among a smaller number of our competitors. We expect competition in
the indications we are pursuing will focus on efficacy, safety, convenience, availability, and price. The commercial
opportunity for apitegromab, if approved, could be reduced or eliminated if our competitors develop and commercialize
products that are perceived to be safer, more effective, have fewer or less severe side effects, are more convenient or are
less expensive than apitegromab. Our competitors also may obtain FDA or other regulatory approval for their products
more rapidly than we may obtain approval for ours, which could result in our competitors establishing a strong market
position before we are able to enter the market.

Preclinical development is uncertain. Our preclinical programs, such as SRK-439, may experience delays or may never
advance to clinical trials, which would adversely affect our ability to develop our product pipeline and receive regulatory
approvals or commercialize these programs on a timely basis or at all, which would have an adverse effect on our
business.

Before we can commence clinical trials for any product candidate, we must complete extensive preclinical studies that
support our planned INDs in the U.S., or similar applications in other jurisdictions. We cannot be certain of the timely
completion or outcome of our preclinical studies or of the timing of any planned IND submission to the FDA or similar
applications in other jurisdictions, and cannot predict if the FDA, EMA or other regulatory authorities will accept our
proposed clinical programs or if the outcome of our preclinical studies will ultimately support the further development of
our programs. As a result, we cannot be sure that we will be able to submit INDs or similar applications for the clinical
development of our preclinical programs, such as our potential IND for SRK-439, on the timelines we expect, if at all, and
we cannot be sure that submission of INDs or similar applications will result in the FDA, the competent authorities and/or
ethics committees in the EU Member States or other regulatory authorities allowing clinical trials to begin.

Conducting preclinical testing can be a lengthy, time-consuming and expensive process. The time required for such testing
may vary substantially according to the type, complexity and novelty of the program, and can be several years or more per
program. Delays associated with programs for which we are conducting preclinical testing and studies may cause us to
incur additional operating expenses. We also may be affected by delays associated with the preclinical testing and studies
of certain programs that are the responsibility of our collaborators or our potential future collaborators over which we have
limited or no control. The commencement and rate of completion of preclinical studies for a product candidate may be
delayed by many factors, including, for example, challenges in reaching consensus with regulatory agencies regarding the
scope of the necessary preclinical study program and/or appropriate preclinical study designs.

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Risks Related to Our Business and Operations

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

We rely on a limited number of third-party contract manufacturers to manufacture all of our clinical trial product supplies
and, if approved, all of our commercial product supplies, including all of our drug substance, drug product, labeling, and
packaging. We do not own our own manufacturing facilities for producing any clinical trial or commercial product
supplies. There can be no assurance that our preclinical, clinical development, and, if approved, commercial product
supplies will not be limited or interrupted due to impacts to our third-party contract manufacturers. For example, we rely
on a single source supplier for the manufacture of apitegromab and SRK-181. Any replacement of our current drug
substance contract manufacturer or drug product contract manufacturer would require significant resources, lead time and
expertise because there may be a limited number of qualified replacements. In addition, our ability to procure sufficient
supplies for the development of apitegromab, SRK-181, SRK-439 or future product candidates could be impacted by
factors outside of our control such as current macroeconomic and geopolitical events and the changing rates of inflation
and interest rates. In addition, we have no direct control over our contract manufacturers’ ability to maintain adequate
quality control, quality assurance and qualified personnel. Furthermore, all of our third-party contract manufacturers supply
and/or manufacture materials or products for other companies, which exposes our third-party contract manufacturers to
regulatory risks for the production of such materials and products. As a result, failure to satisfy the regulatory requirements
for the production of those materials and products may affect the regulatory clearance of our contract manufacturers’
facilities generally.

The manufacturing process for a product candidate is subject to FDA and foreign regulatory authority review. Suppliers
and manufacturers must meet applicable manufacturing requirements and undergo rigorous facility and process validation
tests required by regulatory authorities in order to comply with regulatory standards, such as cGMP. In the event that any of
our manufacturers fails to comply with such requirements or to perform its obligations to us in relation to quality, timing or
otherwise, or if our supply of components or other materials becomes limited or interrupted for other reasons, we may be
forced to manufacture the materials ourselves, for which we currently do not have the capabilities or resources, or enter
into an agreement with another third-party, which we may not be able to do on reasonable terms, if at all. In some cases, the
technical skills or technology required to manufacture our product candidates may be unique or proprietary to the original
manufacturer and we may have difficulty transferring such skills or technology to another third-party and a feasible
alternative may not exist. These factors would increase our reliance on the original manufacturer or require us to obtain a
license from such manufacturer in order to have another third-party manufacture our product candidates. If we must change
manufacturers for any reason, we will be required to verify that the new manufacturer maintains facilities and procedures
that comply with quality standards and with all applicable regulations and guidelines. We will also need to verify, such as
through a manufacturing comparability study, that any new manufacturing process will produce our product candidate
according to the specifications previously submitted to the FDA or another regulatory authority. The delays associated with
the verification of a new manufacturer could negatively affect our ability to develop product candidates in a timely manner
or within budget.

We expect to continue to rely on third-party manufacturers for commercial supplies of drug substance, drug product, and
packaged and labeled product for apitegromab, if we receive regulatory approval. We will also rely on our contract
manufacturers to manufacture sufficient quantities of apitegromab to produce validation batches. We do not have long-term
supply agreements in place with any of our contract manufacturers, and each batch of our product candidates is
individually contracted through a purchase order governed by master service and quality agreements. If our existing
contract manufacturers for our product candidates are not willing to enter into long-term supply agreements, or are not
willing or are unable to supply product candidate supplies to us, we could be required to engage new contract
manufacturers who would need to scale up the manufacturing process before we would be able to use the product candidate
supplies they manufacture, which could result in delays to our clinical trials or future commercialization plans, if we are
successful and gain approval.

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

● an inability to initiate or continue clinical trials for apitegromab, SRK-181, SRK-439 or of future product

candidates under development;

● delay in submitting regulatory applications, or receiving regulatory approvals, for apitegromab, SRK-181, SRK-

439 or future product candidates;

● loss of the cooperation of an existing or future collaborator;

● subjecting third-party manufacturing facilities or our manufacturing facilities to additional inspections by

regulatory authorities;

● requirements to cease distribution or to recall batches of apitegromab, SRK-181, SRK-439 or future product

candidates; and

● in the event of approval to market and commercialize apitegromab, SRK-181, SRK-439 or a future product

candidate, an inability to meet commercial demands for our products.

In addition, we contract with fill and finishing providers which we believe have the appropriate expertise, facilities and
scale to meet our needs. Failure to maintain compliance with cGMP can result in a contractor receiving FDA sanctions,
which can impact our ability to operate or lead to delays in any clinical development programs. We believe that our current
fill and finish contractors are operating in accordance with cGMP, but we can give no assurance that the FDA, EMA,
competent authorities of the EU Member States or other regulatory agencies will not conclude that a lack of compliance
exists. In addition, any delay in contracting for fill and finish services, or failure of the contract manufacturer to perform
the services as needed, may delay any clinical trials, registration and commercial launches, which could negatively affect
our business.

Our reliance on third parties, such as manufacturers, may subject us to risks relating to manufacturing scale-up and
may cause us to undertake substantial obligations, including financial obligations.

In order to continue to conduct later-stage clinical trials, or, if approved, produce commercial product, we will need to
manufacture such product candidate in large quantities. In particular, we expect to rely on our contract manufacturers to
scale our manufacturing processes for future clinical trials of apitegromab, and if our development efforts are successful
and if apitegromab is approved, for commercial supply of apitegromab. We, or any manufacturing partners, may be unable
to successfully increase the manufacturing capacity for apitegromab in a timely or cost-effective manner to meet our supply
requirements. In addition, quality-control issues may arise during scale-up activities. If we, or any manufacturing partners,
are unable to successfully scale-up the manufacture of our product candidates in sufficient quality and quantity, the
development, testing, clinical trials, and if approved, commercial supply, of that product candidate may be delayed or
infeasible, and regulatory approval, commercial launch or commercial supply of any resulting product may be delayed or
not received, which could significantly harm our business.

We will need to continue to grow our organization in certain areas, including our personnel, systems and relationships
with third parties, in order to develop our product candidates, and we may experience difficulties in managing this
growth.

As our clinical development plans and commercialization strategies continue to develop and expand, we expect we will
need to hire additional managerial, clinical development, scientific, regulatory, commercial, and administrative

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personnel. Our ability to compete in the highly competitive biotechnology industry depends upon our ability to attract and
retain highly qualified specialized personnel. As apitegromab approaches commercialization, we will also need to hire
sales, marketing and other commercial personnel. Future growth would impose significant added responsibilities on
members of management, including:

● identifying, recruiting, integrating, maintaining and motivating additional employees;

● managing our development efforts effectively, including the clinical and regulatory review process for

apitegromab, SRK-181, SRK-439, and any future product candidates, while complying with our contractual
obligations to contractors and other third parties; and

● improving our operational, financial and management controls, reporting systems and procedures.

Our future financial performance and our ability to commercialize apitegromab, SRK-181, SRK-439 and future product
candidates, if approved, will depend, in part, on our ability to effectively manage any future growth, and our management
may also have to divert a disproportionate amount of its attention away from day-to-day activities in order to devote a
substantial amount of time to managing these growth activities.

We currently rely, and for the foreseeable future will continue to rely, in substantial part on third parties, advisors and
consultants to provide certain services, including CROs, contract manufacturers and companies focused on antibody
development and discovery activities. There can be no assurance that the services of third parties, advisors and consultants
will continue to be available to us on a timely basis when needed, or that we can find qualified replacements. In addition, if
we are unable to effectively manage our outsourced activities or if the quality, accuracy or quantity of the services provided
is compromised for any reason, our preclinical studies and clinical trials may be extended, delayed or terminated, and we
may not be able to receive, or may be substantially delayed in receiving, regulatory approval of apitegromab, SRK-181,
SRK-439 or future product candidates or otherwise advance our business. There can be no assurance that we will be able to
manage our existing consultants or find other competent outside contractors and consultants on economically reasonable
terms, or at all.

We may not be able to attract or retain qualified management and scientific personnel in the future due to the intense
competition for a limited number of qualified personnel in the biopharmaceutical space, especially those engaged in
oncology and immuno-oncology and cardiometabolic fields. In this highly competitive market, there may be increased
costs to attract and retain qualified personnel. Many of the other pharmaceutical companies that we compete against for
qualified personnel have greater financial resources, different risk profiles and a longer history in the industry than we do.
They also may provide more diverse opportunities and better chances for career advancement. Some of these
characteristics may be more appealing to high quality candidates than what we have to offer. If we are not able to offer
competitive compensation or appealing opportunities for high quality candidates, we may not be able to attract or retain
qualified candidates and personnel. If we are not able to effectively expand our organization by hiring new employees and
expanding our groups of consultants and contractors, we may not be able to successfully implement the tasks necessary to
further develop and commercialize apitegromab, SRK-181, SRK-439 or any future product candidates and, accordingly,
may not achieve our research, development and commercialization goals.

Our executives and highly skilled technical and managerial personnel are critical to our business. If we have transition
in management, lose key personnel, or if we fail to recruit additional highly skilled personnel, our ability to further
develop apitegromab, SRK-181 and SRK-439 and identify and develop new or next generation product candidates may
be impaired.

Our performance substantially depends on the performance of our management team. Any transition or loss of the services
of any of our executives or highly skilled technical and managerial personnel could have a disruptive impact on our ability
to implement our strategy and impede the achievement of our research, development and commercialization objectives. In
addition, these transitions or departures could, cause us to incur increased operating expenses, divert senior management
resources in searching for replacements, or otherwise have a material adverse effect on our business, internal controls,
financial condition and results of operations. Management transition inherently causes some loss of institutional
knowledge, which can negatively affect strategy and operational execution during this phase. If we have

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additional changes to our executives or highly skilled technical and managerial personnel, we may be unable to
successfully manage and grow our business, and our results of operations, execution of corporate goals, internal controls
and financial condition could suffer as a result. The unplanned loss of the services of our executives or other personnel also
could harm our reputation.

Our internal computer systems, or those used by our contract research organizations, or other contractors or
consultants, may fail or suffer security breaches.

We have outsourced significant parts of our IT and business infrastructure to third-party providers, and we currently use
these providers to perform business critical IT and business services for us. Despite the implementation of security
measures, our computer systems, whether they are managed by us directly or by the third parties with whom we contract,
and those of our existing and future CROs, and other contractors and consultants are vulnerable to damage from computer
viruses and unauthorized access. While we have not experienced any such material system failure or security breach to
date, if such an event were to occur and cause interruptions in our operations, it could result in a material disruption of our
development programs and our business operations. Our increased reliance on personnel working from home may increase
our cyber security risk, create data accessibility concerns, and make us more susceptible to workforce and communication
disruptions, any of which could adversely impact our business operations or delay necessary interactions with local and
federal regulators, ethics committees, manufacturing sites, research or clinical trial sites and other agencies and contractors.
For example, the loss of preclinical or clinical data could result in delays in our regulatory approval efforts and
significantly increase our costs to recover or reproduce the data. Likewise, we rely on third parties for the manufacture of
apitegromab, SRK-181 and SRK-439 and to conduct preclinical studies and clinical trials, and similar events relating to
their computer systems could also have a material adverse effect on our business. To the extent that any disruption or
security breach were to result in a loss of, or damage to, our data or applications, or inappropriate disclosure of confidential
or proprietary information, we could incur liability and the further development and commercialization of apitegromab,
SRK-181, SRK-439 and future product candidates could be delayed.

As a company that uses IT systems, our systems may be subject to cyber-attacks. Due to the nature of some of these
attacks, there is a risk that they may remain undetected for a period of time. While we have invested in the protection of
data and information technology, our efforts may not prevent service interruptions or security breaches (e.g., ransomware
attacks). We maintain cyber liability insurance; however, this insurance may not be sufficient to cover the financial, legal,
business, or reputational losses that may result from an interruption or breach of our systems.

Our employees, independent contractors, consultants, commercial partners and vendors may engage in misconduct or
other improper activities, including noncompliance with regulatory standards and requirements.

We are exposed to the risk of employee fraud or other illegal activity by our employees, independent contractors,
consultants, commercial partners and vendors. Misconduct by these parties could include intentional, reckless and/or
negligent conduct that fails to comply with the laws and regulations of the FDA, EU Member States, EMA and other
similar foreign regulatory bodies; provide true, complete and accurate information to the FDA, EMA and other similar
foreign regulatory bodies; comply with manufacturing standards we have established; comply with healthcare fraud and
abuse laws in the U.S. and similar foreign fraudulent misconduct laws; or report financial information or data accurately or
to disclose unauthorized activities to us. If we receive FDA approval of apitegromab, SRK-181, SRK-439 or any future
product candidates and begin commercializing those products in the U.S., our potential exposure under such laws will
increase significantly, and our costs associated with compliance with such laws are also likely to increase. These laws may
impact, among other things, our current activities with principal investigators and research patients, as well as proposed
and future sales, marketing and education programs. We have adopted a code of business conduct and ethics, but it is not
always possible to identify and deter misconduct by our employees, independent contractors, consultants, commercial
partners and vendors, 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 comply with these laws or regulations. If any actions are instituted against us and we are not
successful in defending ourselves or asserting our rights, those actions could result in the imposition of civil, criminal and
administrative penalties, damages, monetary fines, individual imprisonment, disgorgement, possible exclusion from
participation in government healthcare programs, additional reporting obligations and oversight if we become subject to a
corporate integrity agreement or other agreement to resolve allegations of non-compliance with

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these laws, contractual damages, reputational harm, diminished profits and future earnings and the curtailment of our
operations, any of which could adversely affect our ability to operate our business, financial condition and results of
operations.

Ongoing healthcare legislative and regulatory reform measures may have a material adverse effect on our business and
results of operations.

Changes in statutes, regulations or the interpretation of existing statutes or regulations could impact our business in the
future by requiring, for example: (i) changes to our manufacturing arrangements; (ii) additions or modifications to product
labeling; (iii) the recall or discontinuation of our products; (iv) additional record-keeping requirements; or (v) changes to
our pricing arrangements, or coverage of or reimbursement for our products. If any such changes were to be imposed, they
could adversely affect the profitability and operation of our business. See the sections of this Annual Report on Form 10-K
for the fiscal year ended December 31, 2023 entitled, “Business — Government Regulation — Current and Future
Healthcare Reform Legislation” and “Business – Government Regulation – Coverage and Reimbursement.”

It is possible that the ACA, as currently enacted or as it may be amended or otherwise modified in the future, as well as
other healthcare reform measures that may be adopted in the future, may result in additional reductions in Medicare or
other healthcare funding, more rigorous coverage criteria, or new payment methodologies or otherwise affect the prices we
may obtain for any of our product candidates for which we may receive regulatory approval. Any reduction in
reimbursement from Medicare or other government programs may result in a similar reduction in payments from
commercial payors. We cannot predict the reform initiatives that may be adopted in the future or whether initiatives that
have been adopted will be modified or invalidated. The continuing health care reform initiatives efforts of the government,
insurance companies, managed care organizations and other payers of health care services to contain or reduce costs of
health care may adversely affect the demand for any product candidates for which we may obtain regulatory approval, our
ability to set a price that we believe is fair for our products, our ability to obtain coverage and reimbursement approval for
a product, our ability to generate revenues and achieve or maintain profitability; and the level of taxes that we are required
to pay.

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 in the U.S. and elsewhere play a primary role in the
recommendation and prescription of pharmaceutical products. Arrangements with third-party payors and customers can
expose pharmaceutical manufacturers to broadly applicable fraud and abuse and other healthcare laws and regulations,
including, without limitation, the federal Anti-Kickback Statute and the federal False Claims Act (“FCA”), which may
constrain the business or financial arrangements and relationships through which such companies sell, market and
distribute pharmaceutical products. In particular, the research of our product candidates, as well as the promotion, sales and
marketing of healthcare items and services, as well as certain business arrangements in the healthcare industry, are subject
to extensive laws designed to prevent fraud, kickbacks, self-dealing and other abusive practices. These laws and
regulations may restrict or prohibit a wide range of pricing, discounting, marketing and promotion, structuring and
commission(s), certain customer incentive programs and other business arrangements generally. Activities subject to these
laws also involve the improper use of information received in the course of patient recruitment for clinical trials. See the
section in this Annual Report on Form 10-K for the fiscal year ended December 31, 2023 entitled “Business – Government
Regulation – Other Healthcare Laws.”

It is possible that governmental and enforcement authorities will conclude that our business practices may not comply with
current or future statutes, regulations or case law interpreting applicable fraud and abuse or other healthcare laws and
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, including the imposition of civil, criminal and
administrative penalties, damages, fines, disgorgement, individual imprisonment, possible exclusion from participation in
federal and state funded healthcare programs, contractual damages and the curtailment or restricting of our operations, as
well as additional reporting obligations and oversight if we become subject to a corporate integrity

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agreement or other agreement to resolve allegations of non-compliance with these laws. Any action for violation of these
laws, even if successfully defended, could cause a pharmaceutical manufacturer to incur significant legal expenses and
divert management’s attention from the operation of the business. Prohibitions or restrictions on sales or withdrawal of
future marketed products could materially affect business in an adverse way.

Failure to comply with health care privacy and data protection laws and regulations could lead to government
enforcement actions (which could include civil or criminal penalties), private litigation, and/or adverse publicity and
could negatively affect our operating results and business.

We, our CROs, and any potential collaborators may be subject to strict and changing federal, state, and foreign data
protection laws and regulations (i.e., laws and regulations that address privacy and data security) and policies and
contractual obligations related to data privacy and security. In the U.S., numerous federal and state laws and regulations,
including federal health information privacy laws, state data breach notification laws, state health information privacy laws,
and federal and state consumer protection laws (e.g., Section 5 of the Federal Trade Commission Act), that govern the
collection, use, disclosure and protection of health-related and other personal information could apply to our operations or
the operations of our CROs and collaborators. In addition, we may obtain health information from third parties (including
research institutions from which we obtain clinical trial data) that are subject to privacy and security requirements under
HIPAA, as amended by HITECH. Depending on the facts and circumstances, we could be subject to civil, criminal, and
administrative penalties if we knowingly obtain, use, or disclose individually identifiable health information maintained by
a HIPAA-covered entity in a manner that is not authorized or permitted by HIPAA.

Compliance with U.S. and international data protection laws and regulations could require us to take on more onerous
obligations in our contracts, restrict our ability to collect, use and disclose data, or in some cases, impact our ability to
operate in certain jurisdictions. Failure to comply with these laws and regulations could result in government enforcement
actions (which could include civil, criminal and administrative penalties), private litigation, and/or adverse publicity and
could negatively affect our operating results and business. Moreover, clinical trial subjects, employees and other
individuals about whom we or our potential collaborators obtain personal information, as well as the providers who share
this information with us, may limit our ability to collect, use and disclose the information. Claims that we have violated
individuals’ privacy rights, failed to comply with data protection laws, or breached our contractual obligations, even if we
are not found liable, could be expensive and time-consuming to defend and could result in adverse publicity that could
harm our business.

We have conducted our Phase 2 TOPAZ clinical trial of apitegromab in the European Economic Area (“EEA”), are
conducting our Phase 3 SAPPHIRE clinical trial and ONYX, our long-term extension clinical trial of apitegromab, in the
EEA and the UK, and may conduct future clinical trials in the EEA or the UK and therefore may be subject to additional
privacy laws. The EU GDPR imposes a broad range of strict requirements on companies subject to the GDPR, including
requirements relating to having legal bases for processing personal information relating to identifiable individuals and
transferring such information outside the EEA or the UK, including to the U.S., providing details to those individuals
regarding the processing of their personal information, keeping personal information secure, having data processing
agreements with third parties who process personal information, responding to individuals’ requests to exercise their rights
in respect of their personal information, where required reporting security breaches involving personal data to the
competent national data protection authority and affected individuals, where required, appointing data protection officers,
where required conducting data protection impact assessments, and record-keeping. The EU GDPR imposes penalties in
the event of non-compliance, including fines of up to 10,000,000 Euros or up to 2% of our total worldwide annual turnover
for certain comparatively minor offenses, or up to 20,000,000 Euros or up to 4% of our total worldwide annual turnover for
more serious offenses. The EU GDPR also confers a private right of action on data subjects and consumer associations to
lodge complaints with supervisory authorities, seek judicial remedies, and obtain compensation for damages resulting from
violations of the EU GDPR.

Further to the UK’s exit from the EU on January 31, 2020, the EU GDPR ceased to apply in the UK but the UK
incorporated the EU GDPR (as it existed on December 31, 2020 but subject to certain UK specific amendments) into UK
law, referred to as the UK GDPR. The UK GDPR and the UK Data Protection Act 2018 set out the UK’s data protection
regime, which is independent from but currently still aligned to the EU’s data protection regime. Non-compliance with the
UK GDPR may result in monetary penalties of up to £17.5 million or 4% of worldwide revenue, whichever is higher.

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Although the UK is regarded as a third country under the EU’s GDPR, the UK is recognized as providing adequate
protection under the EU GDPR (“UK Adequacy Decision”) and, therefore, transfers of personal data originating in the EU
to the UK remain unrestricted. Likewise, personal data transfers from the UK to the EEA remain free flowing. The UK
Government has introduced a Data Protection and Digital Information Bill (“UK Bill”) into the UK legislative process. The
aim of the UK Bill is to reform the UK’s data protection regime following Brexit. If passed, the final version of the UK Bill
may have the effect of further altering the similarities between the UK and EEA data protection regime and threaten the
UK Adequacy Decision from the European Commission. This may lead to additional compliance costs and could increase
our overall risk. The respective provisions and enforcement of the EU GDPR and UK GDPR may further diverge in the
future and create additional regulatory challenges and uncertainties.

Adequate safeguards must be implemented to enable the transfer of personal data outside of the EEA or the UK in
compliance with European and UK data protection laws. On June 4, 2021, the European Commission (EC) issued new
forms of standard contractual clauses (“SCCs”) for data transfers from controllers or processors in the EEA (or otherwise
subject to the EU GDPR) to controllers or processors established outside the EEA (and not subject to the EU GDPR). The
new SCCs replace the SCCs that were adopted previously under the Data Protection Directive. The UK is not subject to the
EC’s new SCCs but has published its own standard clauses, the International Data Transfer Agreement, which enables
transfers from the UK. We will be required to implement these new safeguards when conducting restricted data transfers
under the EU GDPR and UK GDPR and doing so will require significant effort and cost. Where relying on the SCCs or
UK IDTA for data transfers, we may also be required to carry out transfer impact assessments to assess whether the
recipient is subject to local laws which allow public authority access to personal data.

In July 2023, the European Commission adopted its adequacy decision for the EU-U.S. Data Privacy Framework
(“Framework”), the successor of the EU-U.S. Privacy Shield framework, which the Court of Justice of the European Union
invalidated in 2020. On the basis of the new adequacy decision, personal data can flow safely from the EU to U.S.
companies participating in the Framework, without having to put in place additional data protection safeguards. However,
the long term validity of the Framework, which has already been challenged in court, remains uncertain.

The EU GDPR and UK GDPR may increase our responsibility and liability in relation to personal data that we process
where such processing is subject to the EU GDPR and UK GDPR, and we may be required to put in place additional
mechanisms to ensure compliance with the EU GDPR and UK GDPR, including as implemented by individual countries.
Given the new law, we face uncertainty as to the exact interpretation of the new requirements and we may be unsuccessful
in implementing all measures required by data protection authorities or courts in interpretation of the law. Compliance with
the EU GDPR and UK GDPR will be a rigorous and time-intensive process that may increase our cost of doing business or
require us to change our business practices, and despite those efforts, there is a risk that we may be subject to fines and
penalties, litigation, and reputational harm in connection with our European activities.

EU Member States have adopted implementing national laws to implement the EU GDPR which may partially deviate
from the EU GDPR and the competent authorities in the EU Member States may interpret EU GDPR obligations slightly
differently from country to country, so that we do not expect to operate in a uniform legal landscape in the EU. Also, as it
relates to processing and transfer of genetic data, the EU GDPR specifically allows national laws to impose additional and
more specific requirements or restrictions, and European laws have historically differed quite substantially in this field,
leading to additional uncertainty.

We expect that we will continue to face uncertainty as to whether our efforts to comply with our obligations under
European privacy laws will be sufficient. If we are investigated by a European or UK data protection authority, we may
face fines and other penalties. Any such investigation or charges by European or UK data protection authorities could have
a negative effect on our existing business and on our ability to attract and retain new clients or pharmaceutical partners. We
may also experience hesitancy, reluctance, or refusal by European or multi-national clients or pharmaceutical partners to
continue to use our products and solutions due to the potential risk exposure as a result of the current (and, in particular,
future) data protection obligations imposed on them by certain data protection authorities in interpretation of current law,
including the EU GDPR and UK GDPR. Such clients or pharmaceutical partners may also view any alternative approaches
to compliance as being too costly, too burdensome, too legally uncertain, or otherwise objectionable and therefore decide
not to do business with us. Any of the foregoing could materially harm our business, prospects, financial condition and
results of operations.

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In addition, many states in which we operate have laws that protect the privacy and security of sensitive and personal
information. Certain state laws may be more stringent or broader in scope, or offer greater individual rights, with respect to
sensitive and personal information than federal, international or other state laws, and such laws may differ from each other,
which may complicate compliance efforts. Where state laws are more protective than HIPAA, we must comply with the
state laws we are subject to, in addition to HIPAA. In certain cases, it may be necessary to modify our planned operations
and procedures to comply with these more stringent state laws. Further, in some cases where we process sensitive and
personal information of individuals from numerous states, we may find it necessary to comply with the most stringent state
laws applicable to any of the information. For example, California’s California Consumer Privacy Act (“CCPA”), creates
comprehensive individual privacy rights for California consumers (as defined in the law) and places increased privacy and
security obligations on entities handling personal data of consumers or households. While there are currently exceptions for
protected health information that is subject to HIPAA and clinical trial regulations, as currently written, the CCPA, as
amended by the California Privacy Rights Act (“CPRA”), and other enacted or proposed comprehensive state consumer
privacy legislation may impact our business activities. We continue to monitor the impact that the state consumer privacy
and protection laws, like the CCPA, may have on our business activities. See the section in this Annual Report on Form 10-
K for the fiscal year ended December 31, 2023 entitled “Business – Government Regulation – European General Data
Protection Regulation and “Business – Government Regulation – Other Healthcare and Privacy Laws.”

Artificial intelligence presents risks and challenges that can impact our business including by posing security risks to
our confidential information, proprietary information, and personal data.

The potential use of new and evolving technologies, such as artificial intelligence, in our offerings to employees may result
in additional spending and presents risks and challenges that can impact our business including by posing security and
other risks to our confidential information, proprietary information and personal information, and as a result we may be
exposed to reputational harm and liability.

We may build and integrate artificial intelligence into our offerings, and this innovation may present risks and challenges
that could affect its adoption, and therefore our business. If we enable or offer solutions that draw controversy due to
perceived or actual negative societal impact, we may experience brand or reputational harm, competitive harm or legal
liability. The use of certain artificial intelligence technology can give rise to intellectual property risks, including
compromises to proprietary intellectual property and intellectual property infringement. Additionally, we expect to see
increasing government and supranational regulation related to artificial intelligence use and ethics, which may also
significantly increase the burden and cost of research, development and compliance in this area. For example, the EU’s
Artificial Intelligence Act (“AI Act”) — the world’s first comprehensive AI law — is anticipated to enter into force in
Spring 2024 and, with some exceptions, become effective 24 months thereafter. This legislation imposes significant
obligations on providers and deployers of high risk artificial intelligence systems, and encourages providers and deployers
of artificial intelligence systems to account for EU ethical principles in their development and use of these systems. If we
develop or use AI systems that are governed by the AI Act, it may necessitate ensuring higher standards of data quality,
transparency, and human oversight, as well as adhering to specific and potentially burdensome and costly ethical,
accountability, and administrative requirements. The rapid evolution of artificial intelligence will require the application of
significant resources to design, develop, test and maintain our service offerings to help ensure that artificial intelligence is
implemented in accordance with applicable law and regulation and in a socially responsible manner and to minimize any
real or perceived unintended harmful impacts. Our vendors may in turn incorporate artificial intelligence tools into their
own offerings, and the providers of these artificial intelligence tools may not meet existing or rapidly evolving regulatory
or industry standards, including with respect to privacy and data security. Further, bad actors around the world use
increasingly sophisticated methods, including the use of artificial intelligence, to engage in illegal activities involving the
theft and misuse of personal information, confidential information and intellectual property. Any of these effects could
damage our reputation, result in the loss of valuable property and information, cause us to breach applicable laws and
regulations, and adversely impact our business.

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Additional laws and regulations governing international operations, including certain U.S. and foreign anti-corruption,
anti-money laundering, export control, sanctions, and other trade laws and regulations, could negatively impact or
restrict our operations.

If we further expand our operations outside of the U.S., we must dedicate additional resources to comply with numerous
laws and regulations in each jurisdiction in which we plan to operate. The Foreign Corrupt Practices Act (“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 U.S. 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.

Compliance with the FCPA 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 U.S., 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. If we expand our presence outside of the U.S., it will require us to dedicate
additional resources to comply with these laws, and these laws may preclude us from developing, manufacturing, or selling
certain products and product candidates outside of the U.S., 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 civil and criminal
penalties and suspension or debarment from government contracting. The SEC also may suspend or bar issuers from
trading securities on U.S. exchanges for violations of the FCPA’s accounting provisions.

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 the success of 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 research and
development activities involve the use of biological and hazardous materials and 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, which could cause an interruption of our commercialization efforts, research
and development efforts and business operations, environmental damage resulting in costly clean-up and liabilities under
applicable laws and regulations governing the use, storage, handling and disposal of these materials and specified waste
products. Although we believe that the safety procedures utilized by our third-party manufacturers for handling and
disposing of these materials generally comply with the standards prescribed by these laws and regulations, we cannot
guarantee that this is the case or eliminate the risk of accidental contamination or injury from these materials. In such an
event, we may be held liable for any resulting damages and such liability could exceed our resources and state or federal or
other applicable authorities may curtail our use of certain materials and/or interrupt our business operations. Furthermore,
environmental laws and regulations are complex, change frequently and have tended to become more stringent. We cannot
predict the impact of such changes and cannot be certain of our future compliance. 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 production efforts. Failure to comply with these laws
and regulations also may result in substantial fines, penalties or other sanctions.

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 or other work-related injuries, this insurance may not

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provide adequate coverage against potential liabilities, and as a result, may be subject to lengthy and expensive litigation
and excessive damages and we may not have, or be able to obtain, sufficient capital to pay such amounts. We do not carry
specific biological waste or hazardous waste insurance coverage, workers compensation or property and casualty and
general liability insurance policies that include coverage for damages and fines arising from biological or hazardous waste
exposure or contamination.

If product liability lawsuits are brought against us, we may incur substantial liabilities and may be required to limit
commercialization of our product candidates.

We face an inherent risk of product liability as a result of testing apitegromab, SRK-181, SRK-439 and any of our future
product candidates in clinical trials and will face an even greater risk if we commercialize any products, if approved. For
example, we may be sued if our product candidates cause or are perceived to cause injury or are found to be otherwise
unsuitable during clinical trials, manufacturing, marketing or sale. Any such product liability claims may include
allegations of defects in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence,
strict liability or a breach of warranties. Claims could also be asserted under state consumer protection acts. If we cannot
successfully defend ourselves against product liability claims, we may incur substantial liabilities or be required to limit
commercialization of our product candidates. Even successful defense would require significant financial and management
resources. Regardless of the merits or eventual outcome, liability claims may result in:

● inability to bring a product candidate to the market;

● decreased demand for our products;

● injury to our reputation;

● withdrawal of clinical trial participants and inability to continue clinical trials;

● initiation of investigations by regulators;

● costs to defend the related litigation;

● diversion of management’s time and our resources;

● substantial monetary awards to trial participants;

● product recalls, withdrawals or labeling, marketing or promotional restrictions;

● loss of revenue;

● exhaustion of any available insurance and our capital resources;

● the inability to commercialize any product candidate, if approved; and

● decline in our share price.

Our inability to obtain sufficient product liability insurance at an acceptable cost to protect against potential product
liability claims could prevent or inhibit the commercialization of products we develop, alone or with collaborators. We may
be unable to obtain, or may obtain on unfavorable terms, additional clinical trial insurance in amounts adequate to cover
any liabilities from any of our clinical trials. Our insurance policies may also have various exclusions, and we may be
subject to a product liability claim for which we have no coverage. We may have to pay any amounts awarded by a court or
negotiated in a settlement that exceed our coverage limitations or that are not covered by our insurance, and we may not
have, or be able to obtain, sufficient capital to pay such amounts. Even if our agreements with any future

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corporate collaborators entitle us to indemnification against losses, such indemnification may not be available or adequate
should any claim arise.

Inadequate funding for the FDA, the SEC and other government agencies, including from government shut downs, or
other disruptions to these agencies’ operations, could prevent new products and services from being developed or
commercialized in a timely manner or otherwise prevent those agencies from performing normal business functions on
which the operation of our business may rely, which could negatively impact our business.

The ability of the FDA to review and approve new products can be affected by a variety of factors, including government
budget and funding levels and statutory, regulatory, and policy changes. Average review times at the agency have
fluctuated in recent years as a result. In addition, government funding of other agencies on which our operations may rely,
including those that fund research and development activities, is subject to the political process, which is inherently fluid
and unpredictable.

If a prolonged government shutdown or other disruption occurs, it could significantly impact the ability of the FDA to
timely review and process our regulatory submissions, which could have a material adverse effect on our business. Future
shutdowns or other disruptions could also affect other government agencies such as the SEC, which may also impact our
business by delaying review of our public filings, to the extent such review is necessary, and our ability to access the public
markets.

Our current laboratory operations are concentrated in one location, and we or the third parties upon whom we depend,
including our clinical trial sites and the manufacturing facilities of our third-party contract manufacturers, may
experience business interruptions and our business continuity and disaster recovery plans may not adequately protect us
from a serious disaster, including earthquakes, outbreak of disease or other natural disasters.

Our office and laboratory facilities are located in Cambridge, Massachusetts. Any unplanned event, such as flood, fire,
explosion, earthquake, extreme weather condition, medical epidemics, power shortage, telecommunication failure or other
natural or manmade accidents or incidents that result in us being unable to fully utilize our facilities, the facilities at any
clinical trial site, or the manufacturing facilities of our third-party contract manufacturers, may have a material and adverse
effect on our ability to operate our business, particularly on a daily basis, and have significant negative consequences on
our financial and operating conditions. Loss of access to these facilities may result in increased costs, delays in the
development of apitegromab, SRK-181, SRK-439 and future product candidates or interruption of our business operations.
If a natural disaster, outbreak of disease, power outage or other event occurred that prevented us from using all or a
significant portion of our headquarters, that damaged critical infrastructure, such as our research facilities, our clinical trial
sites or the manufacturing facilities of our third-party contract manufacturers, or that otherwise disrupted operations, it may
be difficult or, in certain cases, impossible, for us to continue our business for a substantial period of time.

Global events, including global health concerns could also result in social, economic, and labor instability in the countries
in which we operate or where the third parties with whom we engage, including our clinical trial sites and manufacturing
facilities of our third-party contract manufacturers, operate. Unforeseen global events, such as increasing inflation and
interest, could adversely impact our business. For example, we are conducting SAPPHIRE, our Phase 3 clinical trial and,
ONYX, our long-term extension clinical trial of apitegromab in the U.S. and EU, and regional instability caused by the
2022 Russian invasion of Ukraine could adversely affect the conduct of our clinical trials. Such conflicts could lead to
sanctions, embargoes, supply shortages, regional instability, geopolitical shifts, cyberattacks, other retaliatory actions, and
adverse effects on macroeconomic conditions, currency exchange rates, and financial markets, which could adversely
impact our operations and financial results, as well as those of third parties with whom we conduct business.

The disaster recovery and business continuity plans we have in place may prove inadequate in the event of a serious
disaster or similar event. We may incur substantial expenses as a result of the limited nature of our disaster recovery and
business continuity plans, which could have a material adverse effect on our business. As part of our risk management
policy, we maintain insurance coverage at levels that we believe are appropriate for our business. However, in the event of
an accident or incident at our facilities, we cannot assure you that the amounts of insurance will be sufficient to satisfy

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any damages and losses. If our facilities, the manufacturing facilities of our third-party contract manufacturers, or the sites
where we conduct clinical trials or preclinical studies, are unable to operate because of an accident or incident or for any
other reason, even for a short period of time, our research and development programs may be harmed. Any business
interruption may have a material and adverse effect on our business, financial condition, results of operations and
prospects.

Coverage and reimbursement may be limited or unavailable in certain market segments for our product candidates, if
approved, which could make it difficult for us to sell any product candidates profitably.

The success of our product candidates, apitegromab and SRK-181, and future product candidates such as SRK-439, if
approved, depends on the availability of coverage and adequate reimbursement from third-party payors. We cannot be sure
that coverage and reimbursement will be available for, or accurately estimate the potential revenue from, apitegromab,
SRK-181, SRK-439 or future product candidates or assure that coverage and reimbursement will be available for any
product that we may develop. See the sections in this Annual Report on Form 10-K for the fiscal year ended December 31,
2023 entitled “Business– Government Regulation – Coverage and Reimbursement” and “Business–Government
Regulation–Current and Future Healthcare Reform Legislation.”

Patients who are provided medical treatment for their conditions generally rely on third-party payors to reimburse all or
part of the costs associated with their treatment. Coverage and adequate reimbursement from governmental healthcare
programs, such as Medicare and Medicaid or national payor bodies (such as in European countries), and commercial
payors is critical to new product acceptance.

Government authorities and other third-party payors, such as private health insurers and health maintenance organizations,
decide which drugs and treatments they will cover and the amount of reimbursement. Coverage and reimbursement by a
third-party payor may depend upon a number of factors, including the third-party payor’s determination that use of a
product is:

● a covered benefit under its health plan;

● safe, effective and medically necessary;

● appropriate for the specific patient;

● cost-effective; and

● neither experimental nor investigational.

In the U.S., no uniform policy of coverage and reimbursement for products exists among third party payors, Coverage and
reimbursement for products can differ significantly from payor to payor. One payor’s decision to cover a particular medical
product or service does not ensure that other payors will also provide coverage for the medical product or service, or will
provide coverage at an adequate reimbursement rate. Coverage and reimbursement for products may vary widely across
national payors from country to country.

Payors are increasingly challenging the price and examining the medical necessity and cost-effectiveness of medical
products and services, in addition to their safety and efficacy. In order to obtain and maintain coverage and reimbursement
for any product, we may need to conduct expensive evidence generation studies in order to demonstrate the medical
necessity and cost-effectiveness of such a product, in addition to the costs required to obtain regulatory approvals. If payors
do not consider a product to be cost-effective compared to current standards of care, they may not cover the product as a
benefit under their plans or, if they do, the level of payment may not be sufficient to allow a company to cover its costs or
make a profit. Even if we obtain coverage for a given product, the resulting reimbursement payment rates might not be
adequate for us to achieve or sustain profitability or may require co-payments that patients find unacceptably high.
Additionally, third-party payors may not cover, or provide adequate reimbursement for, long-term follow-up evaluations
required following the use of product candidates. Patients are unlikely to use our product

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candidates unless coverage is provided and reimbursement is adequate to cover a significant portion of the cost of our
product candidates. There is significant uncertainty related to insurance coverage and reimbursement of newly approved
products. It is difficult to predict at this time what third-party payors will decide with respect to the coverage and
reimbursement for our product candidates.

Payment methodologies may be subject to changes in healthcare legislation and regulatory initiatives. Additional state and
federal healthcare reform measures are expected to be adopted in the future, any of which could limit the amounts that
federal and state governments will pay for healthcare products and services, which could result in reduced demand for
certain pharmaceutical products or additional pricing pressures.

Moreover, increasing efforts by governmental and third-party payors in the U.S. and abroad to cap or reduce healthcare
costs may cause such organizations to limit both coverage and the level of reimbursement for newly approved products
and, as a result, they may not cover or provide adequate payment for our product candidates. There has been increasing
legislative and enforcement interest in the U.S. with respect to specialty drug pricing practices. Specifically, there have
been several recent U.S. Congressional inquiries and proposed and enacted federal and state legislation designed to, among
other things, bring more transparency to drug pricing, reduce the cost of prescription drugs under Medicare, review the
relationship between pricing and manufacturer patient programs, and reform government program reimbursement
methodologies for drugs. We expect to experience pricing pressures in connection with the sale of any of our product
candidates due to the trend toward managed healthcare, the increasing influence of health maintenance organizations, cost
containment initiatives and additional legislative changes.

EU drug marketing and reimbursement regulations may materially affect our ability to market and receive coverage for
our products in the European Member States.

We intend to seek approval to market our product candidates in both the U.S. and in selected foreign jurisdictions. If we
receive approval in one or more foreign jurisdictions for apitegromab, SRK-181, SRK-439 or future product candidates, we
will be subject to rules and regulations in those jurisdictions. In some foreign countries, particularly those in the EU, the
pricing of medicinal products is subject to governmental control and other market regulations which could put pressure on
the pricing and usage of our product candidates. In these countries, pricing negotiations with governmental authorities can
take considerable time after receiving marketing approval of a product candidate. In addition, market acceptance and sales
of our product candidates will depend significantly on the availability of adequate coverage and reimbursement from third-
party payors for our product candidates and may be affected by existing and future health care reform measures.

Much like the federal Anti-Kickback Statute prohibition in the U.S., the provision of benefits or advantages to physicians
to induce or encourage the prescription, recommendation, endorsement, purchase, supply, order or use of medicinal
products is also prohibited in the EU. The provision of benefits or advantages to physicians is governed by the national
anti-inducement, advertising and anti-bribery laws of EU Member States. Infringement of these laws could result in
substantial fines and imprisonment.

Payments made to physicians in certain EU Member States must be disclosed publicly. Moreover, agreements with
physicians often must be the subject of prior notification and approval by the physician’s employer, his or her competent
professional organization and/or the regulatory authorities of the individual EU Member States. These requirements are
provided in the national laws, industry codes or professional codes of conduct, applicable in the EU Member States. EU
Directive 2001/83/EC, which is the EU Directive governing medicinal products for human use, further provides that where
medicinal products are being promoted to persons qualified to prescribe or supply them, no gifts, pecuniary advantages or
benefits in kind may be supplied, offered or promised to such persons unless they are inexpensive and relevant to the
practice of medicine or pharmacy. Failure to comply with these requirements could result in reputational risk, public
reprimands, administrative penalties, fines or imprisonment.

In addition, in most foreign countries, including several EU Member States, the proposed pricing for a drug must be
approved before it may be lawfully marketed. The requirements governing drug pricing and reimbursement vary widely
from country to country. For example, the EU provides options for its Member States to restrict the range of medicinal
products for which their national health insurance systems provide reimbursement and to control the prices of medicinal

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products for human use. Reference pricing used by various EU Member States and parallel distribution, or arbitrage
between low-priced and high-priced Member States, can further reduce prices. A Member State may approve a specific
price for the medicinal product or it may instead adopt a system of direct or indirect controls on the profitability of the
company placing the medicinal product on the market. In some countries, we may be required to conduct a clinical study or
other studies that compare the cost-effectiveness of any of our product candidates to other available therapies in order to
obtain or maintain reimbursement or pricing approval. There can be no assurance that any country that has price controls or
reimbursement limitations for pharmaceutical products will allow favorable reimbursement and pricing arrangements for
any of our products. Historically, products launched in the EU do not follow price structures of the U.S. and generally
prices tend to be significantly lower. Publication of discounts by third-party payors or authorities may lead to further
pressure on the prices or reimbursement levels within the country of publication and other countries. If pricing is set at
unsatisfactory levels or if reimbursement of our products is unavailable or limited in scope or amount, our revenues from
sales by us or our strategic partners and the potential profitability of any of our product candidates in those countries would
be negatively affected.

We may seek to enter into collaborations in the future with third parties, including for apitegromab, SRK-181, SRK-439
or potential product candidates. If we are unable to enter into such collaborations, or if these collaborations are not
successful, our business could be adversely affected.

A part of our strategy is to evaluate and, as deemed appropriate, enter into additional collaborations or partnerships in the
future when strategically attractive, including potentially with biotechnology or pharmaceutical companies. We have
limited capabilities for product development and only recently have begun to build our capabilities to prepare for potential
commercialization. Accordingly, we may enter into collaborations with other companies to provide us with important
technologies, capabilities and funding for our programs and underlying technology.

Any future collaboration we enter into may pose a number of risks, including the following:

● collaborators may have significant discretion or decision-making authority in determining the efforts and
resources that they will apply to the collaboration or that we are required to apply to the collaboration;

● collaborators may not perform their obligations as expected or in a manner satisfactory to us;

● we may commit to certain preclinical or clinical development or commercialization efforts as part of the

collaboration that we are unable to meet or our collaborators may not be satisfied with our preclinical or clinical
development or commercialization efforts;

● collaborators may not pursue development and commercialization of any product candidates that achieve

regulatory approval or may elect not to continue or renew development or commercialization programs or license
arrangements based on clinical trial results, changes in the collaborators’ strategic focus or available funding, or
external factors, such as a strategic transaction that may divert resources or create competing priorities;

● collaborators may delay clinical trials, provide insufficient funding for a clinical trial program, stop a clinical trial
or abandon a product candidate, repeat or conduct new clinical trials or require a new formulation of a product
candidate for clinical testing;

● collaborators could independently develop, or develop with third parties, products that compete directly or

indirectly with our products and product candidates if the collaborators believe that the competitive products are
more likely to be successfully developed or can be commercialized under terms that are more economically
attractive than ours;

● product candidates discovered in collaboration with us may be viewed by our collaborators as competitive with
their own product candidates or products, which may cause collaborators to cease to devote resources to the
commercialization of our product candidates;

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● collaborators may fail to comply with applicable regulatory requirements regarding the development,

manufacture, distribution or marketing of a product candidate or product;

● collaborators with marketing and distribution rights to one or more of our product candidates that achieve

regulatory approval may not commit sufficient resources to the marketing and distribution of such product or
products;

● disagreements with collaborators, including disagreements over proprietary rights, contract interpretation or the

preferred course of development, might cause delays or terminations of the research, development or
commercialization of product candidates, might lead to additional responsibilities for us with respect to product
candidates, or might result in litigation or arbitration, any of which would be time-consuming and expensive;

● collaborators may not properly maintain or defend our intellectual property rights or may use our proprietary
information in such a way as to invite litigation that could jeopardize or invalidate our intellectual property or
proprietary information or expose us to potential litigation;

● collaborators may infringe the intellectual property rights of third parties, which may expose us to litigation and

potential liability;

● if a collaborator of ours is involved in a business combination, the collaborator might deemphasize or terminate

the development or commercialization of any product candidate licensed to it by us;

● collaborations may be terminated by the collaborator, and, if terminated, we may be blocked to advance the

program due to collaborator patents that are not licensed to us; and

● collaborations may be terminated by the collaborator, and, if terminated, we could be required to raise additional

capital to pursue further development or commercialization of the applicable product candidates.

If our future collaborations do not result in the successful discovery, development and commercialization of product
candidates or if one of our collaborators terminates its agreement with us, we may not receive any future research funding
or milestone or royalty payments under such collaboration. All of the risks relating to product development, regulatory
approval and commercialization described in this Annual Report on Form 10-K also apply to the activities of potential
therapeutic collaborators.

Additionally, if one of our collaborators terminates its agreement with us, we may find it more difficult to attract new
collaborators and our perception in the biotechnology or pharmaceutical industry, including within the business and
financial communities, could be adversely affected.

We face significant competition in seeking appropriate partners for our product candidates, and the negotiation process is
time-consuming and complex. In order for us to successfully partner our product candidates, potential partners must view
these product candidates as economically valuable in markets they determine to be attractive in light of the terms that we
are seeking and other available products for licensing by other companies. Collaborations are complex and time-consuming
to negotiate and document. In addition, there have been a significant number of recent business combinations among large
pharmaceutical companies that have resulted in a reduced number of potential future collaborators. Our ability to reach a
definitive agreement for a collaboration will depend, among other things, upon our assessment of the collaborator’s
resources and expertise, the terms and conditions of the proposed collaboration and the proposed collaborator’s evaluation
of a number of factors. If we are unable to reach agreements with suitable collaborators on a timely basis, on acceptable
terms, or at all, we may have to curtail the development of a product candidate, reduce or delay its development program or
one or more of our other development programs, delay its potential commercialization or reduce the scope of any sales or
marketing activities, or increase our expenditures and undertake development or commercialization activities at our own
expense. If we elect to increase our expenditures to fund development or commercialization activities on our own, we may
need to obtain additional expertise and additional capital, which may not be available to us on acceptable terms, or at all. If
we fail to enter into collaborations or do not have sufficient funds

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or expertise to undertake the necessary development and commercialization activities, we may not be able to further
develop our product candidates, bring them to market and generate revenue from sales of drugs or continue to develop our
technology, and our business may be materially and adversely affected. Even if we are successful in our efforts to establish
new strategic collaborations, the terms that we agree upon may not be favorable to us, and we may not be able to maintain
such strategic collaborations if, for example, development or approval of a product candidate is delayed or sales of an
approved product are disappointing. Any delay in entering into new strategic collaboration agreements related to our
product candidates could delay the development and commercialization of our product candidates and reduce their
competitiveness even if they reach the market.

Risks Related to Our Intellectual Property

Our success depends in part on our ability to protect our intellectual property. It is difficult and costly to protect our
proprietary rights and technology, and we may not be able to ensure their protection.

Our commercial success will depend in large part on obtaining and maintaining patent, trademark and trade secret
protection of our proprietary technologies and our product candidates, their respective components, formulations,
combination therapies, methods used to manufacture them and methods of treatment, as well as successfully defending
these patents against third-party challenges. Our ability to stop unauthorized third parties from making, using, selling,
offering to sell or importing our product candidates is dependent upon the extent to which we have rights under valid and
enforceable patents that cover these activities. If we are unable to secure and maintain patent protection for any product or
technology we develop, or if the scope of the patent protection secured is not sufficiently broad, our competitors could
develop and commercialize products and technology similar or identical to ours, and our ability to commercialize any
product candidates we may develop may be adversely affected.

The patenting process is expensive and time-consuming, and we may not be able to file and prosecute all necessary or
desirable patent applications at a reasonable cost or in a timely manner. In addition, we may not pursue or obtain patent
protection in all relevant markets. Unforeseen global events, and sanctions or actions relating to such events, could affect
our ability to file, prosecute, maintain, and/or defend patents and applications in those markets. It is also possible that we
will fail to identify patentable aspects of our research and development output before it is too late to obtain patent
protection. Moreover, in some circumstances, we may not have the right to control the preparation, filing and prosecution
of patent applications, or to maintain the patents, covering technology that we license from or license to third parties and
are reliant on our licensors or licensees.

The strength of patents in the biotechnology and pharmaceutical field involves complex legal and scientific questions and
can be uncertain. The patent applications that we own or in-license may fail to result in issued patents with claims that
cover our product candidates or uses thereof in the U.S. and/or in other foreign countries. Even if the patents do
successfully issue, third parties may challenge the validity, enforceability or scope thereof, which may result in such
patents being narrowed, invalidated or held unenforceable. For example, Russia issued a decree in March of 2022, stating
that patent owners who reside in a country “unfriendly” to Russia are not entitled to compensation in the event of patent
infringement. Furthermore, even if they are unchallenged, our patents and patent applications may not adequately protect
our intellectual property and/or prevent others from designing around our claims. If the breadth or strength of protection
provided by the patent applications we hold with respect to our product candidates is threatened, it could dissuade
companies from collaborating with us to develop, and threaten our ability to commercialize, our product candidates.
Further, if we encounter delays in our clinical trials, the period of time during which we could market our product
candidates under patent protection would be reduced.

We cannot be certain that we are the first to invent the inventions covered by pending patent applications and, if we are not,
we may be subject to priority disputes. We may be required to disclaim part or all of the term of certain patents or all of the
term of certain patent applications. There may be prior art of which we are not aware that may affect the validity or
enforceability of a patent claim. There also may be prior art of which we are aware, but which we do not believe affects the
validity or enforceability of a claim, which may, nonetheless, ultimately be found to affect the validity or enforceability of
a claim. No assurance can be given that if challenged, our patents would be declared by a court to be valid or enforceable
or that even if found valid and enforceable, a competitor’s technology or product would be found by a court to infringe our
patents. We may analyze patents or patent applications of our competitors that we believe are

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relevant to our activities, and consider that we are free to operate in relation to our product candidates, but our competitors
may achieve issued claims, including in patents we consider to be unrelated, which block our efforts or may potentially
result in our product candidates or our activities infringing such claims. The possibility exists that others will develop
products which have the same effect as our products on an independent basis which do not infringe our patents or other
intellectual property rights, or will design around the claims of patents that we have had issued that cover our products.

In addition, periodic maintenance fees on any issued patent are due to be paid to the U.S. Patent Office (“USPTO”) and
foreign patent agencies in several stages over the lifetime of the patent. The USPTO and various foreign governmental
patent agencies require compliance with a number of procedural, documentary, fee payment and other provisions during
the patent application process and following the issuance of a patent. While an inadvertent lapse can, in many cases, be
cured by payment of a late fee or by other means in accordance with the applicable rules, there are situations in which
noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss
of patent rights in the relevant jurisdiction. Noncompliance events that could result in abandonment or lapse of a patent or
patent application include, but are not limited to, failure to respond to official actions within prescribed time limits, non-
payment of fees and failure to properly legalize and submit formal documents. Moreover, complications due to global
pandemics may result in inadvertent lapse due to, for example, unexpected closures of the USPTO or foreign patent offices,
delays in delivery of notifications relating to deadlines, or failure to timely and/or properly obtain signatures on necessary
documents. Additionally, due to the ongoing conflict in Ukraine, there remain uncertainties as to any potential impact on
patent protection and/or enforcement in the region, including, for example, payments to the Russian Patent Office and other
entities. In such an event, our competitors might be able to enter the market, which would have a material adverse effect on
our business.

The degree of future protection for our proprietary rights is uncertain because legal means afford only limited protection
and may not adequately protect our rights or permit us to gain or keep our competitive advantage. For example:

● it is possible that our pending patent applications will not result in issued patents;

● we or our licensors, as the case may be, might not have been the first to file patent applications for these

inventions;

● the claims of our owned or in-licensed issued patents or patent applications, if and when issued, may not cover

our product candidates;

● it is possible that there are prior public disclosures that could invalidate our or our licensors’ patents, as the case

may be, or parts of our or their patents;

● our owned or in-licensed issued patents may not provide us with any competitive advantages, may be narrowed in

scope, or be held invalid or unenforceable as a result of legal challenges by third parties;

● we or our licensors, as the case may be, may fail to meet our obligations to the U.S. government in regards to any
in-licensed patents and patent applications funded by U.S. government grants, leading to the loss of patent rights;

● the laws of foreign countries may not protect our or our licensors’, as the case may be, proprietary rights to the

same extent as the laws of the U.S.;

● the inventors of our owned or in-licensed patents or patent applications may become involved with competitors,
develop products or processes which design around our patents, or become hostile to us or the patents or patent
applications on which they are named as inventors;

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● it is possible that our owned or in-licensed patents or patent applications omit individual(s) that should be listed
as inventor(s) or include individual(s) that should not be listed as inventor(s), which may cause these patents or
patents issuing from these patent applications to be held invalid or unenforceable;

● others may be able to make or use compounds or cells that are similar to the biological compositions of our

product candidates but that are not covered by the claims of our patents;

● others may independently develop similar or alternative technologies or duplicate any of our technologies;

● it is possible that others may circumvent our owned or in-licensed patents;

● the active biological ingredients in our current product candidates will eventually become commercially available
in biosimilar drug products, and no patent protection may be available with regard to formulation or method of
use;

● we have engaged in scientific collaborations in the past, and will continue to do so in the future. Such

collaborators may develop adjacent or competing products to ours that are outside the scope of our patents;

● we may not develop additional proprietary technologies for which we can obtain patent protection;

● it is possible that product candidates or diagnostic tests we develop may be covered by third parties’ patents or

other exclusive rights;

● it is possible that there are unpublished applications or patent applications maintained in secrecy that may later

issue with claims covering our products or technology similar to ours; and/or

● the patents of others may have an adverse effect on our business.

Our current patents covering our proprietary technologies and our product candidates are expected to expire beginning in
2034, without taking into account any possible patent term adjustments or extensions. Our earliest patents may expire
before, or soon after, our first product achieves marketing approval in the U.S. or foreign jurisdictions. Upon the expiration
of our current patents, we may lose the right to exclude others from practicing these inventions. The expiration of these
patents could also have a material adverse effect on our business, results of operations, financial condition and prospects.
We own pending patent applications covering our proprietary technologies or our product candidates that if issued as
patents are expected to expire from 2034 through 2045, without taking into account any possible patent term adjustments
or extensions. However, we cannot be assured that the USPTO or relevant foreign patent offices will grant any of these
patent applications.

We depend on intellectual property licensed from third parties. Failure to comply with our obligations under any of
these licenses or termination of any of these licenses could result in the loss of significant rights, which would harm our
business.

We are dependent on patents, know-how and proprietary technology, including intellectual property rights licensed from
others. We may be a party to license agreements pursuant to which we in-license key patents and patent applications for our
product candidates. These licenses impose various diligence, milestone payment, royalty, insurance and other obligations
on us. If we fail to comply with these obligations, our licensors may have the right to terminate the license. Any
termination of licenses by third parties could result in our loss of significant intellectual property rights and could harm our
ability to commercialize our product candidates.

We may have limited control over the maintenance and prosecution of these in-licensed patents and patent applications,
activities or any other intellectual property that may be related to our in-licensed intellectual property. For example, we
cannot be certain that such activities by these licensors have been or will be conducted in compliance with applicable laws
and regulations or will result in valid and enforceable patents and other intellectual property rights. We may have

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limited control over the manner in which our licensors initiate an infringement proceeding against a third-party infringer of
the intellectual property rights, or defend certain of the intellectual property that is licensed to us. It is possible that the
licensors’ infringement proceeding or defense activities may be less vigorous than had we conducted them ourselves.

Disputes may also arise between us and our licensors regarding intellectual property subject to a license agreement,
including:

● the scope of rights granted under the license agreement and other interpretation related issues;

● whether and the extent to which our technology and processes infringe on intellectual property of the licensor that

is not subject to the licensing agreement;

● our right to sublicense patent and other rights to third parties under collaborative development relationships; and

● the ownership of inventions and know-how resulting from the joint creation or use of intellectual property by our

licensors and us and our partners.

If disputes over intellectual property that we have licensed prevent or impair our ability to maintain our current licensing
arrangements on acceptable terms, we may be unable to successfully develop and commercialize the affected product
candidates.

We may not be successful in obtaining or maintaining necessary rights to develop any future product candidates on
acceptable terms.

Because our programs may involve additional product candidates that may require the use of additional proprietary rights
held by third parties, the growth of our business may depend in part on our ability to acquire, in-license or use these
proprietary rights.

Our product candidates may also require specific formulations to work effectively and efficiently, and these rights may be
held by others. We may develop products containing our compounds and pre-existing pharmaceutical compounds. We may
be required by the FDA or comparable foreign regulatory authorities to provide a companion diagnostic test or tests with
our product candidates. These diagnostic test or tests may be covered by intellectual property rights held by others. We may
be unable to acquire or in-license any compositions, methods of use, processes or other third-party intellectual property
rights from third parties that we identify as necessary or important to our business operations. We may fail to obtain any of
these licenses at a reasonable cost or on reasonable terms, if at all, which would harm our business. We may need to cease
use of the compositions or methods covered by such third-party intellectual property rights, and may need to seek to
develop alternative approaches that do not infringe on such intellectual property rights which may entail additional costs
and development delays, even if we were able to develop such alternatives, which may not be feasible. Even if we are able
to obtain a license, it may be non-exclusive, thereby giving our competitors access to the same technologies licensed to us.
In that event, we may be required to expend significant time and resources to develop or license replacement technology.

Additionally, we sometimes collaborate with academic institutions to accelerate our preclinical research or development
under written agreements with these institutions. In certain cases, these institutions provide us with an option to negotiate a
license to any of the institution’s rights in technology resulting from the collaboration. Regardless of such option, we may
be unable to negotiate a license within the specified timeframe or under terms that are acceptable to us. If we are unable to
do so, the institution may offer the intellectual property rights to others, potentially blocking our ability to pursue our
program. If we are unable to successfully obtain rights to required third-party intellectual property or to maintain the
existing intellectual property rights we have, we may have to abandon development of such program and our business and
financial condition could suffer.

The licensing or acquisition of third-party intellectual property rights is a competitive area, and companies, which may be
more established, or have greater resources than we do, may also be pursuing strategies to license or acquire third-

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party intellectual property rights that we may consider necessary or attractive in order to commercialize our product
candidates. More established companies may have a competitive advantage over us due to their size, cash resources and
greater clinical development and commercialization capabilities. There can be no assurance that we will be able to
successfully complete such negotiations and ultimately acquire the rights to the intellectual property surrounding the
additional product candidates that we may seek to acquire.

Changes in patent law in the U.S. and in ex-U.S. jurisdictions could diminish the value of patents in general, thereby
impairing our ability to protect our products.

As is the case with other biopharmaceutical companies, our success is heavily dependent on intellectual property,
particularly patents. Obtaining and enforcing patents in the biopharmaceutical industry involve both technological and
legal complexity, and is therefore costly, time-consuming and inherently uncertain.

In addition, recent or future patent reform legislation could increase the uncertainties and costs surrounding the prosecution
of our patent applications and the enforcement or defense of our issued patents. Under the enacted Leahy-Smith America
Invents Act (the “America Invents Act”), enacted in 2013, the U.S. moved from a “first to invent” to a “first to file”
system. Under a “first to file” system, assuming the other requirements for patentability are met, the first inventor to file a
patent application generally will be entitled to a patent on the invention regardless of whether another inventor had made
the invention earlier. The America Invents Act includes a number of other significant changes to U.S. patent law, including
provisions that affect the way patent applications are prosecuted, redefine prior art and establish a new post-grant review
system. The effects of these changes are currently unclear as the USPTO only recently developed new regulations and
procedures in connection with the America Invents Act, and many of the substantive changes to patent law, including the
“first to file” provisions, only became effective in March 2013. In addition, the courts have yet to address many of these
provisions and the applicability of the act and new regulations on specific patents discussed herein have not been
determined and would need to be reviewed. However, the America Invents Act and its implementation could increase the
uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued
patents, all of which could have a material adverse effect on our business and financial condition.

Recent U.S. Supreme Court rulings have also narrowed the scope of patent protection available in certain circumstances
and weakened the rights of patent owners in certain situations. In addition to increasing uncertainty with regard to our
ability to obtain patents in the future, this combination of events has created uncertainty with respect to the value of
patents, once obtained. As a consequence, issued patents may be found to contain invalid claims according to the newly
revised eligibility and validity standards. Additionally, some of our owned or in-licensed patents may be subject to
challenge and subsequent invalidation or significant narrowing of claim scope in proceedings before the USPTO, or during
litigation, under the revised criteria which could also make it more difficult to obtain patents.

Depending on decisions by the U.S. Congress, the federal courts, and the USPTO, the laws and regulations governing
patents could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce our existing
patents and patents that we might obtain in the future. For example, in the case Amgen Inc. v. Sanofi, the Federal Circuit
held that a well characterized antigen is insufficient to satisfy the written description requirement of certain claims directed
to a genus of antibodies that are solely defined by function. While the validity of a subset of patents at issue was
subsequently upheld by a district court jury, uncertainty remains as to the legal question pertaining to the written
description requirement under 35 USC §112 as it relates to functional antibodies. In the case of Assoc. for Molecular
Pathology v. Myriad Genetics, Inc., the U.S. Supreme Court held that certain claims to DNA molecules are not patentable.
We cannot predict how these decisions or any future decisions by the courts, the U.S. Congress or the USPTO may impact
the value of our patents. Similarly, any adverse changes in the patent laws of other jurisdictions could have a material
adverse effect on our business and financial condition. For example, Russia issued a decree in March of 2022, stating that
patent owners who reside in a country “unfriendly” to Russia are not entitled to compensation in the event of patent
infringement.

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Third-party claims of intellectual property infringement may prevent or delay our product discovery and development
efforts.

Our commercial success depends in part on our ability to develop, manufacture, market and sell our product candidates and
use our proprietary technologies without infringing the proprietary rights of third parties. There is a substantial amount of
litigation involving patents and other intellectual property rights in the biotechnology and pharmaceutical industries, as
well as administrative proceedings for challenging patents, including interference, derivation, inter partes review, post-
grant review, and reexamination proceedings before the USPTO or oppositions and other comparable proceedings in
foreign jurisdictions. We may be exposed to, or threatened with, future litigation by third parties having patent or other
intellectual property rights alleging that our product candidates and/or proprietary technologies infringe their intellectual
property rights. Numerous U.S. and foreign issued patents and pending patent applications, which are owned by third
parties, exist in the fields in which we are developing our product candidates. As the biotechnology and pharmaceutical
industries expand and more patents are issued, the risk increases that our product candidates may give rise to claims of
infringement of the patent rights of others. Moreover, it is not always clear to industry participants, including us, which
patents cover various types of drugs, products or their methods of use or manufacture. Thus, because of the large number of
patents issued and patent applications filed in our fields, there may be a risk that third parties may allege they have patent
rights encompassing our product candidates, technologies or methods.

If a third-party claims that we infringe its intellectual property rights, we may face a number of issues, including, but not
limited to:

● infringement and other intellectual property claims which, regardless of merit, may be expensive and time-

consuming to litigate and may divert our management’s attention from our core business;

● substantial damages for infringement, which we may have to pay if a court decides that the product candidate or

technology at issue infringes on or violates the third-party’s rights, and, if the court finds that the infringement
was willful, we could be ordered to pay treble damages and the patent owner’s attorneys’ fees;

● a court prohibiting us from developing, manufacturing, marketing or selling our product candidates, or from using
our proprietary technologies, unless the third-party licenses its product rights to us, which it is not required to do;

● if a license is available from a third-party, we may have to pay substantial royalties, upfront fees and other

amounts, and/or grant cross-licenses to intellectual property rights for our products; and

● redesigning our product candidates or processes so they do not infringe, which may not be possible or may

require substantial monetary expenditures and time.

Some of our competitors may be able to sustain the costs of complex patent litigation more effectively than we can because
they have substantially greater resources. In addition, any uncertainties resulting from the initiation and continuation of any
litigation could have a material adverse effect on our ability to raise the funds necessary to continue our operations or could
otherwise have a material adverse effect on our business, results of operations, financial condition and prospects.

Third parties may assert that we are employing their proprietary technology without authorization. Generally, conducting
clinical trials and other development activities in the U.S. is protected under the Safe Harbor exemption as set forth in 35
U.S.C. § 271. If and when apitegromab, SRK-181, or another one of our product candidates is approved by the FDA, that
certain third-party may then seek to enforce its patent by filing a patent infringement lawsuit against us. While we are not
aware of any claims of such a patent that could otherwise materially adversely affect commercialization of our product
candidates, we may be incorrect in this belief, or we may not be able to prove it in a litigation. In this regard, patents issued
in the U.S. by law enjoy a presumption of validity that can be rebutted only with evidence that is “clear and convincing,” a
heightened standard of proof. There may be third-party patents of which we are currently unaware with claims to materials,
formulations, methods of manufacture or methods for treatment related to the use or manufacture of our product
candidates. Because patent applications can take many years to issue, there may be currently

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pending patent applications which may later result in issued patents that our product candidates may infringe. In addition,
third parties may obtain patents in the future and claim that use of our technologies infringes upon these patents. If any
third-party patents were held by a court of competent jurisdiction to cover the manufacturing process of our product
candidates, constructs or molecules used in or formed during the manufacturing process, or any final product itself, the
holders of any such patents may be able to block our ability to commercialize the product candidate unless we obtained a
license under the applicable patents, or until such patents expire or they are finally determined to be held invalid or
unenforceable. Similarly, if any third-party patent were held by a court of competent jurisdiction to cover aspects of our
formulations, processes for manufacture or methods of use, the holders of any such patent may be able to block our ability
to develop and commercialize the product candidate unless we obtained a license or until such patent expires or is finally
determined to be held invalid or unenforceable. In either case, such a license may not be available on commercially
reasonable terms, or at all. If we are unable to obtain a necessary license to a third-party patent on commercially reasonable
terms, or at all, our ability to commercialize our product candidates may be impaired or delayed, which could in turn
significantly harm our business. Even if we obtain a license, it may be non-exclusive, thereby giving our competitors
access to the same technologies licensed to us. 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 product candidates.

Parties making claims against us may seek and obtain injunctive or other equitable relief, which could effectively block our
ability to further develop and commercialize our product candidates. Defense of these claims, regardless of their merit,
would involve substantial litigation expense and would be a substantial diversion of employee resources from our business.
In the event of a successful claim of infringement against us, we may have to pay substantial damages, including treble
damages and attorneys’ fees for willful infringement, obtain one or more licenses from third parties, and/or pay royalties or
redesign our infringing products, which may be impossible or require substantial time and monetary expenditure. We
cannot predict whether any such license would be available at all or whether it would be available on commercially
reasonable terms. Furthermore, even in the absence of litigation, we may need to obtain licenses from third parties to
advance our research or allow commercialization of our product candidates. We may fail to obtain any of these licenses at a
reasonable cost or on reasonable terms, if at all. In that event, we would be unable to further develop and commercialize
our product candidates, which could harm our business significantly.

We may also choose to challenge the patentability of claims in a third-party’s U.S. patent by requesting that the USPTO
review the patent claims in an ex-parte re-exam, inter partes review or post-grant review proceedings. These proceedings
are expensive and may consume our time or other resources. We may choose to challenge the grant of a third-party’s patent
in opposition proceedings in the European Patent Office (“EPO”) or other foreign patent office. The costs of these
opposition proceedings could be substantial, and may consume our time or other resources. If we fail to obtain a favorable
result at the USPTO, EPO or other patent office, then we may be exposed to litigation by a third-party alleging that the
patent may be infringed by our product candidates or proprietary technologies.

Additionally, the Unified Patent/Unified Patent Court system in Europe became fully operational in June 2023.

● The new court may be associated with greater degrees of uncertainty in litigation, with respect to both planning

and outcome.

● The opt-out selection afforded during the transition may have a direct impact on future litigation and may result in

loss of certain flexibility with regard to choice of forum and other litigation strategy considerations.

We may incur substantial costs as a result of litigation or other proceedings relating to our patents or the patents of our
licensors, and we may be unable to protect our rights to our products and technology.

Competitors may infringe our patents or the patents of our licensors. To counter infringement or unauthorized use, we may
be required to file infringement claims against a third party(ies), which can be expensive and time-consuming. In addition,
in an infringement proceeding, a court may decide that one or more of our patents is not valid or is unenforceable, or may
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. There is also the risk that, even if the validity of our patents or the patents of our licensors is upheld, the court
will refuse to stop the third-party on the ground that such third-party’s activities do not

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infringe our owned or in-licensed patents. An adverse result in any litigation or defense proceedings could put one or more
of our patents at risk of being invalidated, held unenforceable, or interpreted narrowly and could put our patent applications
at risk of not issuing. Defense of these claims, regardless of their merit, would involve substantial litigation expense and
would be a substantial diversion of employee resources from our business.

Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation,
there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation.
In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or
developments. If securities analysts or investors perceive these results to be negative, it could have a substantial adverse
effect on the price of our common stock.

In some situations, we or our licensor, may not be able to detect infringement against our owned or in-licensed patents, as
the case may be, which may be especially difficult for manufacturing processes or formulation patents. Even if we or our
licensors detect infringement by a third-party of our owned or in-licensed patents, we or our licensors, as the case may be,
may choose not to pursue litigation against or settlement with the third-party. If we, or our licensors, later sue such third-
party for patent infringement, the third-party may have certain legal defenses available to it, which otherwise would not be
available except for the delay between when the infringement was first detected and when the suit was brought. Such legal
defenses may make it impossible for us or our licensors to enforce our owned or in-licensed patents, as the case may be,
against such third-party.

Issued patents covering our product candidates could be found invalid or unenforceable if challenged in court or the
USPTO.

If we or one of our licensing partners initiate legal proceedings against a third-party to enforce a patent covering one of our
product candidates, the defendant could counterclaim that the patent covering our product candidate, as applicable, is
invalid and/or unenforceable. In patent litigation in the U.S., defendant counterclaims alleging invalidity and/or
unenforceability are commonplace, and there are numerous grounds upon which a third-party can assert invalidity or
unenforceability of a patent. Third parties may also raise similar claims before administrative bodies in the U.S. or abroad,
even outside the context of litigation. Such mechanisms include inter parties review, ex parte re-examination, post-grant
review, and equivalent proceedings in foreign jurisdictions (e.g., opposition proceedings). For example, EP3368069 and
EP2981822 are currently subject to opposition proceedings. Such proceedings are expensive and could result in revocation
or amendment to our patents in such a way that they no longer cover our product candidates. The outcome following legal
assertions of invalidity and unenforceability is unpredictable. With respect to the validity question, for example, we cannot
be certain that there is no invalidating prior art, of which we, our patent counsel and the patent examiner were unaware
during prosecution. If a defendant were to prevail on a legal assertion of invalidity and/or unenforceability, or if we are
otherwise unable to adequately protect our rights, we would lose at least part, and perhaps all, of the patent protection on
our product candidates. Such a loss of patent protection could have a material adverse impact on our business and our
ability to commercialize or license our technology and product candidates.

In addition, because some patent applications in the U.S. may be maintained in secrecy until the patents are issued, because
patent applications in PCT member jurisdictions are typically not published until 18 months after the earliest filing, and
because publications in the scientific literature often lag behind actual discoveries, we cannot be certain that others have
not filed patent applications for technology covered by our owned and in-licensed issued patents or our pending
applications, or that we or, if applicable, a licensor were the first to invent the technology. Our competitors may have filed,
and may in the future file, patent applications covering our products, compositions, methods of use, or technology similar
to ours. Any such patent application may have priority over our owned and in-licensed patent applications or patents,
which could require us to obtain rights to issued patents covering such technologies. If another party has filed a U.S. patent
application on inventions similar to those owned by or in-licensed to us, we or, in the case of in-licensed technology, the
licensor may have to participate in an interference proceeding declared by the USPTO to determine priority of invention in
the U.S. If we or one of our licensors is a party to an interference proceeding involving a U.S. patent application on
inventions owned by or in-licensed to us, we may incur substantial costs, divert management’s time and expend other
resources, even if we are successful.

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For applications filed under pre-AIA, interference proceedings declared by the USPTO may be necessary to determine the
priority of inventions with respect to our patents or patent applications or those of our licensors. An unfavorable outcome
could result in a loss of our current patent rights and could require us to cease using the related technology or to attempt to
license rights to it from the prevailing party. Our business could be harmed if the prevailing party does not offer us a
license on commercially reasonable terms. Litigation or interference proceedings may result in a decision adverse to our
interests and, even if we are successful, may result in substantial costs and distract our management and other employees.
We may not be able to prevent, alone or with our licensors, misappropriation of our trade secrets or confidential
information, particularly in countries where the laws may not protect those rights as fully as in the U.S.

We have limited foreign intellectual property rights and may not be able to protect our intellectual property rights
throughout the world.

We have limited intellectual property rights outside the U.S. Filing, prosecuting and defending patents on product
candidates in all countries throughout the world would be prohibitively expensive, and our intellectual property rights in
some countries outside the U.S. can be less extensive than those in the U.S. In addition, the laws of some foreign countries
do not protect intellectual property rights to the same extent as federal and state laws in the U.S. Consequently, we may not
be able to prevent third parties from practicing our inventions in all countries outside the U.S., or from selling or importing
products made using our inventions in and into the U.S. or other jurisdictions. Indeed, Russia issued a decree in March of
2022, stating that patent owners who reside in a country “unfriendly” to Russia are not entitled to compensation in the
event of patent infringement. Competitors may use our technologies in jurisdictions where we have not obtained patent
protection to develop their own products and, further, may export otherwise infringing products to territories where we
have patent protection but where enforcement is not as strong as that in the U.S. These products may compete with our
products in jurisdictions where we do not have any issued patents and our patent claims or other intellectual property rights
may not be effective or sufficient to prevent them from competing.

Many companies have encountered significant problems in protecting and defending intellectual property rights in foreign
jurisdictions. The legal systems of certain countries, particularly certain developing countries, do not favor the enforcement
of patents, trade secrets and other intellectual property protection, particularly those relating to biopharmaceutical products
and/or methods of medical treatment, which could make it difficult for us to stop the infringement of our patents or
marketing of competing products against third parties in violation of our proprietary rights generally. The initiation of
proceedings by third parties to challenge the scope or validity of our patent rights in foreign jurisdictions could result in
substantial cost and divert our efforts and attention from other aspects of our business. Proceedings to enforce our patent
rights in foreign jurisdictions could result in substantial costs and divert our efforts and attention from other aspects of our
business, could put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not
issuing and could provoke third parties to assert claims against us. We may not prevail in any lawsuits that we initiate and
the damages or other remedies awarded, if any, may not be commercially meaningful. Accordingly, our efforts to enforce
our intellectual property rights around the world may be inadequate to obtain a significant commercial advantage from the
intellectual property that we develop or license.

As another example, in Europe, a new unitary patent system became effective in June 2023, which may significantly
impact European patents, including those granted before the introduction of such a system. Under the unitary patent
system, European applications have the option, upon grant of a patent, of becoming a Unitary Patent which will be subject
to the jurisdiction of the Unitary Patent Court (“UPC”). As the UPC is a new court system, there is no precedent for the
court, increasing the uncertainty of any litigation. Subject to current transitional provisions, European patents have the
option of opting out of the jurisdiction of the UPC and remaining as national patents in the UPC countries. Patents that
remain under the jurisdiction of the UPC are potentially vulnerable to a single UPC-based revocation challenge that, if
successful, could invalidate the patent in all countries who are signatories to the UPC. We cannot predict with certainty the
long-term effects of any potential changes.

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Patent terms may result in inadequate protection for our product candidates, and we may be unable to obtain patent
term extensions and data exclusivity for our product candidates, resulting in material harm to our business.

Patents have a limited lifespan. In the U.S., if all maintenance fees are timely paid, the natural expiration of a patent is
generally 20 years from its earliest U.S. non-provisional filing date. Various extensions such as patent term adjustments
and/or extensions, may be available, but the life of a patent, and the protection it affords, is limited.

Depending upon the timing, duration and specifics of any FDA marketing approval of any product candidates we may
develop, one or more of our U.S. patents may be eligible for limited patent term extension under the Drug Price
Competition and Patent Term Restoration Action of 1984, also known as the Hatch Waxman Amendments. The Hatch
Waxman Amendments permit a patent extension term of up to five years as compensation for patent term lost during the
FDA regulatory review process. The patent term restoration period is generally one-half of the time between the effective
date of the IND or the date of patent grant (whichever is later) and the date of submission of the BLA, plus the time
between the date of submission of the BLA and the date of FDA approval of the product. The patent holder must apply for
restoration within 60 days of approval. A patent term extension cannot extend the remaining term of a patent beyond a total
of 14 years from the date of product approval, only one patent may be extended and only those claims covering the
approved drug, a method for using it, or a method for manufacturing it may be extended. We may not be granted an
extension because of, for example, failing to exercise due diligence during the testing phase or regulatory review process,
failing to apply within applicable deadlines, failing to apply prior to expiration of relevant patents, or otherwise failing to
satisfy applicable requirements. Moreover, the applicable time period or the scope of patent protection afforded could be
less than we request.

Given the amount of time required for the development, testing and regulatory review of new product candidates, the
patents protecting our product candidates might expire before or shortly after such candidates are commercialized. If we
are unable to obtain patent term extension or the term of any such extension is less than we request, our competitors may
obtain approval of competing products following our patent expiration. As a result, our owned and licensed patent portfolio
may not provide us with sufficient rights to exclude others from commercializing products similar or identical to ours,
which could materially harm our business, financial condition, results of operations, and prospects.

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

In addition to patent protection, we rely heavily upon know-how and trade secret protection, as well as non-disclosure
agreements and invention assignment agreements with our employees, consultants and third parties, to protect our
confidential and proprietary information, especially where we do not believe patent protection is appropriate or obtainable.
In addition to contractual measures, we try to protect the confidential nature of our proprietary information using physical
and technological security measures. Such measures may not, for example, in the case of misappropriation of a trade secret
by an employee or third-party with authorized access, provide adequate protection for our proprietary information. Our
security measures may not prevent an employee or consultant from misappropriating our trade secrets and providing them
to a competitor, and recourse we take against such misconduct may not provide an adequate remedy to protect our interests
fully. Enforcing a claim that a party illegally disclosed or misappropriated a trade secret can be difficult, expensive, and
time-consuming, and the outcome is unpredictable. In addition, trade secrets may be independently developed by others in
a manner that could prevent legal recourse by us. If any of our confidential or proprietary information, such as our trade
secrets, were to be disclosed or misappropriated, or if any such information was independently developed by a competitor,
our competitive position could be harmed.

In addition, courts outside the U.S. are sometimes less willing to protect trade secrets. If we choose to go to court to stop a
third-party from using any of our trade secrets, we may incur substantial costs. These lawsuits may consume our time and
other resources even if we are successful. Although we take steps to protect our proprietary information and trade secrets,
including through contractual means with our employees and consultants, third parties may independently develop
substantially equivalent proprietary information and techniques or otherwise gain access to our trade secrets or disclose our
technology.

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Thus, we may not be able to meaningfully protect our trade secrets. It is our policy to require our employees, consultants,
outside scientific collaborators, sponsored researchers and other advisors to execute confidentiality agreements upon the
commencement of employment or consulting relationships with us. These agreements provide that all confidential
information concerning our business or financial affairs developed or made known to the individual or entity during the
course of the party’s relationship with us is to be kept confidential and not disclosed to third parties except in specific
circumstances. In the case of employees, the agreements provide that all inventions conceived by the individual, and which
are related to our current or planned business or research and development or made during normal working hours, on our
premises or using our equipment or proprietary information, are our exclusive property. In addition, we take other
appropriate precautions, such as physical and technological security measures, to guard against misappropriation of our
proprietary technology by third parties. We have also adopted policies and conduct training that provides guidance on our
expectations, and our advice for best practices, in protecting our trade secrets.

Third parties may assert that our employees or consultants have wrongfully used, disclosed, or misappropriated their
confidential information or trade secrets.

As is common in the biotechnology and pharmaceutical industries, we employ individuals who were previously employed
at universities or other biopharmaceutical or pharmaceutical companies, including our competitors or potential competitors.
Although no claims against us are currently pending, and although we try to ensure that our employees and consultants do
not use the proprietary information or know-how of others in their work for us, we may be subject to claims that we or our
employees, consultants or independent contractors have inadvertently or otherwise used or disclosed intellectual property,
including trade secrets or other proprietary information, of a former employer or other third parties. Litigation may be
necessary to defend against these claims. If we fail in defending any such claims, in addition to paying monetary damages,
we may lose valuable intellectual property rights or personnel. Even if we are successful in defending against such claims,
litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses, and
could distract our technical and management personnel from their normal responsibilities. In addition, there could be public
announcements of the results of hearings, motions or other interim proceedings or developments, and, if securities analysts
or investors perceive these results to be negative, it could have a substantial adverse effect on the price of our common
stock. This type of litigation or proceeding could substantially increase our operating losses and reduce our resources
available for development activities. We may not have sufficient financial or other resources to adequately conduct such
litigation or proceedings. Some of our competitors may be able to sustain the costs of such litigation or proceedings more
effectively than we can because of their substantially greater financial resources. Uncertainties resulting from the initiation
and continuation of patent litigation or other intellectual property related proceedings could adversely affect our ability to
compete in the marketplace.

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

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

Risks Related to Our Financial Condition and Capital Requirements

We have incurred net losses in every year since our inception and anticipate that we will continue to incur net losses in
the future.

We are a biopharmaceutical company formed in 2012 and our operations to date have been focused on research and
development of monoclonal antibodies that selectively inhibit activation of growth factors for therapeutic effect. We have
not yet demonstrated the ability to progress any of our product candidates through clinical trials, we have no products
approved for commercial sale and we have not generated any revenue from product sales to date. We continue to incur
significant research and development and other expenses related to our ongoing operations. As a result, we are

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not profitable and have incurred losses in each period since our inception. For the twelve months ended December 31, 2023
and 2022, we reported a net loss of $165.8 million and $134.5 million, respectively. As of December 31, 2023, we had an
accumulated deficit of $676.4 million. We expect to continue to incur significant losses for the foreseeable future, and we
expect these losses to increase as we continue our research and development of, and seek regulatory approvals for, our
product candidates, apitegromab, SRK-181, SRK-439, and any future product candidates.

To become and remain profitable, we or any current or potential future collaborators must develop and eventually
commercialize products with significant market potential and favorable pricing. This will require us to be successful in a
range of challenging activities, including completing preclinical studies and clinical trials, receiving marketing approval for
product candidates, manufacturing, marketing and selling products for which we may receive marketing approval and
satisfying any post-marketing requirements. We may never succeed in any or all of these activities and, even if we do, we
may never generate revenue that is significant or large enough to achieve profitability. If we do achieve profitability, we
may not be able to sustain or increase profitability on a quarterly or annual basis. Our failure to become and remain
profitable could decrease the value of our company and could impair our ability to raise capital, maintain our research and
development efforts, expand our business or continue our operations.

Even if we succeed in commercializing one or more of our product candidates, we will continue to incur substantial
research and development and other expenditures to develop and market additional product candidates. We may encounter
unforeseen expenses, difficulties, complications, delays and other unknown factors that may adversely affect our business.
The size of our future net losses will depend, in part, on the rate of future growth of our expenses and our ability to
generate revenue. Our prior losses and expected future losses have had and will continue to have an adverse effect on our
stockholders’ equity and working capital.

We will require additional capital to fund our operations and if we fail to obtain necessary capital, we will not be able to
complete the development and commercialization of apitegromab, SRK-181, SRK-439 and any future product
candidates.

Our operations have consumed substantial amounts of cash since inception. We expect to continue to spend substantial
amounts of cash to conduct further research and development, including clinical trials for apitegromab and SRK-181 and
preclinical studies and clinical trials for SRK-439 and any future product candidates, to seek regulatory approvals for our
product candidates and to launch and commercialize any products for which we receive regulatory approval. As of
December 31, 2023, we had approximately $279.9 million in cash, cash equivalents and marketable securities. Based on
our current operating plan, we believe that our existing cash, cash equivalents and marketable securities as of December
31, 2023, will be sufficient to fund our operating expenses and capital expenditure requirements into the second half of
2025. However, our future capital requirements and the period for which our existing resources will support our operations
may vary significantly from what we expect, and we will in any event require additional capital in order to complete
clinical development of any of our current programs. Our monthly spending levels will vary based on new and ongoing
development and corporate activities. Because the length of time and activities associated with development of our product
candidates is highly uncertain, we are unable to estimate the actual funds we will require for development and any
approved marketing and commercialization activities. Additionally, any program setbacks or delays due to changes in
federal or state laws or clinical site or clinical vendor policies as a result of the impacts of current macroeconomic and
geopolitical events, increasing rates of inflation and rising interest rates could impact our programs and increase our
expenditures. Our future funding requirements, both near and long-term, will depend on many factors, including, but not
limited to:

● the initiation, progress, timing, completion, costs and results of clinical trials for apitegromab and SRK-181 and

preclinical studies and clinical trials for SRK-439 and any future product candidates;

● the clinical development plans we establish for our product candidates;

● the number and characteristics of product candidates that we identify and develop;

● the terms of any collaboration, strategic alliance, or licensing agreements we are currently party to or may choose

to enter into in the future;

● the outcome, timing and cost of meeting regulatory requirements established by the FDA, the EMA, and other

comparable foreign regulatory authorities;

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● the cost of filing, prosecuting, defending and enforcing our patent claims and other intellectual property rights;

● the cost of defending intellectual property disputes, including patent infringement actions brought by third parties

against us or our product candidates;

● the effect of competing technological and market developments;

● the cost and timing of developing research cell lines and development and completion of commercial scale

outsourced manufacturing activities;

● the impact of any business interruptions to our operations, including the timing and enrollment of patients in our
planned clinical trials, or to those of our manufacturers, suppliers, or other vendors resulting from pandemics or
similar public health crisis or macroeconomic conditions; and

● the cost of establishing sales, marketing and distribution capabilities for any product candidates for which we may

receive regulatory approval in regions where we choose to commercialize our products on our own.

We do not have any committed external source of funds or other support for our development efforts. Until we can generate
sufficient product or royalty revenue to finance our cash requirements, which we may never do, we expect to finance our
future cash needs through a combination of public or private equity offerings, debt financings, collaborations, strategic
alliances, licensing arrangements and other marketing or distribution arrangements. If we raise additional funds through
public or private equity offerings, the terms of these securities may include liquidation or other preferences that adversely
affect our stockholders’ rights. Further, to the extent that we raise additional capital through the sale of common stock or
securities convertible or exchangeable into common stock, your ownership interest will be diluted. In addition, any debt
financing may subject us to fixed payment obligations and covenants limiting or restricting our ability to take specific
actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise additional capital
through marketing and distribution arrangements or other collaborations, strategic alliances or licensing arrangements with
third parties, we may have to relinquish certain valuable rights to our product candidates, technologies, future revenue
streams or research programs or grant licenses on terms that may not be favorable to us. We also could be required to seek
collaborators for apitegromab, SRK-181, SRK-439 or any future product candidate at an earlier stage than otherwise would
be desirable or relinquish our rights to product candidates or technologies that we otherwise would seek to develop or
commercialize ourselves. If we are unable to raise additional capital in sufficient amounts or on terms acceptable to us, we
may have to significantly delay, scale back or discontinue the development or commercialization of apitegromab, SRK-
181, SRK-439 or one or more of our future product candidates or other research and development initiatives. Any of the
above events could significantly harm our business, prospects, financial condition and results of operations and cause the
price of our common stock to decline.

Changes in tax law could adversely affect our business and financial condition.

The rules dealing with U.S. federal, state, and local income taxation are constantly under review by persons involved in the
legislative process and by the Internal Revenue Service and the U.S. Treasury Department. Changes to tax laws (which
changes may have retroactive application) could adversely affect us or holders of our common stock. For example, under
Section 174 of the Code, in taxable years beginning after December 31, 2021, expenses that are incurred for research and
development in the U.S. will be capitalized and amortized, which may have an adverse effect on our cash flow. In recent
years, many such changes have been made and changes are likely to continue to occur in the future. Future changes in tax
laws could have a material adverse effect on our business, cash flow, financial condition or results of operations. It cannot
be predicted whether, when, in what form or with what effective dates tax laws, regulations and rulings may be enacted,
promulgated or issued, which could result in an increase in our or our shareholders’ tax liability or require changes in the
manner in which we operate in order to minimize or mitigate any adverse effects of changes in tax law. We urge investors
to consult with their legal and tax advisers regarding the implications of potential changes in tax laws on an investment in
our common stock.

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Our ability to use our net operating loss carryforwards and certain tax credit carryforwards may be subject to limitation.

As of December 31, 2023, we had net operating loss carryforwards for federal and state income tax purposes of $403.2
million and $402.8 million, respectively, which begin to expire in 2032, except for our post 2017 federal net operating loss
carryforwards of $352.7 million which do not expire. As of December 31, 2023, we also had available tax credit
carryforwards for federal and state income tax purposes of $40.8 million and $6.1 million, respectively, which begin to
expire in 2034 and 2024, respectively. Additionally, for taxable years beginning after December 31, 2017 the deductibility
of the indefinite lived federal net operating losses is limited to 80% of our taxable income in any future taxable year. Under
Section 382 of the Internal Revenue Code of 1986, as amended (the “Code”), changes in our ownership may limit the
amount of our net operating loss carryforwards and tax credit carryforwards that could be utilized annually to offset our
future taxable income, if any. This limitation would generally apply in the event of a cumulative change in ownership of
our company of more than 50% within a three-year period. Any such limitation may significantly reduce our ability to
utilize our net operating loss carryforwards and tax credit carryforwards before they expire. Private placements and other
transactions that have occurred since our inception, as well as our IPO, may trigger such an ownership change pursuant to
Section 382 of the Code. Any such limitation, whether as the result of our IPO, prior private placements, sales of our
common stock by our existing stockholders or additional sales of our common stock by us, could have a material adverse
effect on our results of operations in future years.

Adverse developments affecting the financial services industry, such as actual events or concerns involving liquidity,
defaults, or non-performance by financial institutions or transactional counterparties, could adversely affect our
current and projected business operations and our financial condition and results of operations.

Actual events involving limited liquidity, defaults, non-performance or other adverse developments that affect financial
institutions, transactional counterparties or other companies in the financial services industry or the financial services
industry generally, or concerns or rumors about any events of these kinds or other similar risks, have in the past and may in
the future lead to market-wide liquidity problems. For example, on March 10, 2023, Silicon Valley Bank (“SVB”) was
closed by the California Department of Financial Protection and Innovation, which appointed the Federal Deposit
Insurance Corporation (“FDIC”) as receiver. Similarly, on March 12, 2023, Signature Bank and Silvergate Capital Corp.
were each swept into receivership. Since then, additional financial institutions have experienced similar failures and have
been placed into receivership.

Inflation and rapid increases in interest rates have led to a decline in the trading value of previously issued government
securities with interest rates below current market interest rates. Although the U.S. Department of Treasury, FDIC and
Federal Reserve Board have announced a program to provide up to $25 billion of loans to financial institutions secured by
certain of such government securities held by financial institutions to mitigate the risk of potential losses on the sale of
such instruments, widespread demands for customer withdrawals or other liquidity needs of financial institutions for
immediate liquidity may exceed the capacity of such program. Additionally, there is no guarantee that the U.S. Department
of Treasury, FDIC and Federal Reserve Board will provide access to uninsured funds in the future in the event of the
closure of other banks or financial institutions, or that they would do so in a timely fashion.

Although we assess our banking relationships as we believe necessary or appropriate, our access to funding sources and
other credit arrangements in amounts adequate to finance or capitalize our current and projected future business operations
could be significantly impaired by factors that affect the Company, the financial institutions with which the Company has
credit agreements or arrangements directly, or the financial services industry or economy in general. These factors could
include, among others, events such as liquidity constraints or failures, the ability to perform obligations under various types
of financial, credit or liquidity agreements or arrangements, disruptions or instability in the financial services industry or
financial markets, or concerns or negative expectations about the prospects for companies in the financial services industry.
These factors could involve financial institutions or financial services industry companies with which the Company has
financial or business relationships, but could also include factors involving financial markets or the financial services
industry generally.

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The results of events or concerns that involve one or more of these factors could include a variety of material and adverse
impacts on our current and projected business operations and our financial condition and results of operations. These could
include, but may not be limited to, the following:

● delayed access to deposits or other financial assets or the uninsured loss of deposits or other financial assets;

● delayed or lost access to, or reductions in borrowings available under our existing debt facility; or

● potential or actual breach of contractual obligations that require the Company to maintain certain financial

accounts at specific financial institutions.

In addition, investor concerns regarding the U.S. or international financial systems could result in less favorable
commercial financing terms, including higher interest rates or costs and tighter financial and operating covenants, or
systemic limitations on access to credit and liquidity sources, thereby making it more difficult for us to acquire financing
on acceptable terms or at all. Any decline in available funding or access to our cash and liquidity resources could, among
other risks, adversely impact our ability to meet our operating expenses, financial obligations or fulfill our other
obligations, result in breaches of our financial and/or contractual obligations or result in violations of federal or state wage
and hour laws. Any of these impacts, or any other impacts resulting from the factors described above or other related or
similar factors not described above, could have material adverse impacts on our liquidity and our current and/or projected
business operations and financial condition and results of operations.

In addition, any further deterioration in the macroeconomic economy or financial services industry could lead to losses or
defaults by our suppliers, which in turn, could have a material adverse effect on our current and/or projected business
operations and results of operations and financial condition. For example, a supplier could be adversely affected by any of
the liquidity or other risks that are described above as factors that could result in material adverse impacts on us, including
but not limited to delayed access or loss of access to uninsured deposits or loss of the ability to draw on existing credit
facilities involving a troubled or failed financial institution. Any supplier bankruptcy or insolvency, or any breach or
default by a supplier, or the loss of any significant supplier relationships, could result in material losses to us and may have
a material adverse impact on our business.

Our current investment policy focuses on preservation of capital. However, we could recognize losses on securities held
in our investment portfolio, particularly if interest rates increase or economic and market conditions deteriorate.

As of December 31, 2023, the fair value of our cash equivalents and investments in our marketable debt securities portfolio
was approximately $279.9 million and consisted primarily of investments in money market funds and U.S. government
securities. Factors beyond our control can significantly influence the fair value of securities in our portfolio and can cause
potential adverse changes to the fair value of these securities. For example, fixed-rate securities acquired by us are
generally subject to decreases in market value when interest rates rise. Additional factors include, but are not limited to,
rating agency downgrades of the securities or our own analysis of the value of the security, defaults by the issuer with
respect to the underlying securities, and continued instability in the credit markets. Any of the foregoing factors could
cause other-than-temporary impairment in future periods and result in realized losses. The process for determining whether
impairment is other-than-temporary usually requires difficult, subjective judgments about the future financial performance
of the issuer and any collateral underlying the security in order to assess the probability of receiving all contractual
principal and interest payments on the security.

At December 31, 2023, we had one thousand in net unrealized losses in our marketable securities available-for-sale
portfolio, and unrealized losses in our securities portfolio may increase in the future due to the aforementioned economic
factors. While our goal is to hold each security until maturity, that may not be possible in light of our policy to preserve
capital and liquidity and because investment in securities with unrealized losses has a diminished utility as a source of
liquidity prior to maturity. Selling securities with an unrealized loss would result in the realization of such losses, which
could have an adverse effect on our financial condition and results of operations.

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The price of our stock is volatile, and you could lose all or part of your investment.

Risks Related to Our Common Stock

Similar to the trading prices of the common stock of other biopharmaceutical companies, the trading price of our common
stock is subject to wide fluctuations in response to various factors, some of which are beyond our control, including limited
trading volume. In addition to the factors discussed in this “Risk Factors” section and elsewhere in this Annual Report on
Form 10-K, these factors include:

● announcements of significant acquisitions, strategic collaborations or partnerships, joint ventures or capital

commitments by us, our collaborators or our competitors;

● actual or anticipated variations in quarterly operating results or our cash position;

● our failure to meet the estimates and projections of the investment community or that we may otherwise provide

to the public;

● changes in accounting practices; and

● significant lawsuits, including patent or stockholder litigation.

In addition, the stock market in general, and the market for biopharmaceutical companies in particular, have experienced
extreme price and volume fluctuations that have often been unrelated or disproportionate to the operating performance of
these companies. Broad market and industry factors may negatively affect the market price of our common stock,
regardless of our actual operating performance. In the past, securities class action litigation has often been instituted against
companies following periods of volatility in the market price of a company’s securities. This type of litigation, if instituted,
could result in substantial costs and a diversion of management’s attention and resources, which would harm our business,
operating results or financial condition.

We do not intend to pay dividends on our common stock so any returns will be limited to the value of our stock.

We currently anticipate that we will retain future earnings for the development, operation and expansion of our business
and do not anticipate declaring or paying any cash dividends for the foreseeable future. Furthermore, our ability to pay cash
dividends is currently restricted by the terms of our debt facility with Oxford and SVB, and future debt or other financing
arrangements may contain terms prohibiting or limiting the amount of dividends that may be declared or paid on our
common stock. Any return to stockholders will therefore be limited to the appreciation of their stock.

Our Board members, management, and their affiliates, own a significant percentage of our stock and will be able to
exert significant control over matters subject to stockholder approval.

As of December 31, 2023, our executive officers, directors and their affiliates beneficially hold, in the aggregate,
approximately 17.9% of our outstanding voting stock. These stockholders, acting together, are able to significantly
influence all matters requiring stockholder approval. For example, these stockholders are able to significantly influence
elections of directors, amendments of our organizational documents, or approval of any merger, sale of assets, or other
major corporate transaction. This may prevent or discourage unsolicited acquisition proposals or offers for our common
stock that you may feel are in your best interest as one of our stockholders.

As of December 31, 2023, we are no longer an “emerging growth company” and the reduced disclosure requirements
applicable to emerging growth companies no longer apply to us.

As of December 31, 2023, we are no longer an Emerging Growth Company (“EGC”), as defined in the Jumpstart Our
Business Startups Act (the “JOBS Act”). We are now subject to certain disclosure requirements that are applicable to other
public companies that have not previously been applicable to us as an emerging growth company and may incur

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additional significant legal, accounting and other expenses in relation to our status as a non-EGC. These requirements
include:

● to perform system and process evaluation and testing of our internal control over financial reporting to allow our
management to report on the effectiveness of our internal control over financial reporting. We will also be
required to have our independent registered public accounting firm issue an opinion on the effectiveness of our
internal control over financial reporting on an annual basis if and when we lose our status as a “smaller reporting
company”. See Risk Factor titled “We expect to continue to incur increased costs as a result of operating as a
public company, and our management is required to devote substantial time to new compliance initiatives.” for
additional information on this requirement;

● additional disclosure obligations regarding executive compensation in our periodic reports and proxy statements;

● compliance with the requirements of holding nonbinding advisory votes on executive compensation and

stockholder approval of any golden parachute payments not previously approved; and

● compliance with any requirement that may be adopted by the Public Company Accounting Oversight Board

regarding mandatory audit firm rotation or a supplement to the auditor’s report providing additional information
about the audit and the financial statements.

In addition, we will no longer be able to use the extended transition period for complying with new or revised accounting
standards available to emerging growth companies and will be required to adopt new or revised accounting standards as of
the effective dates for public companies. Such changes may require us to incur additional costs for compliance. See Risk
Factor titled “We are and expect to continue to be a “smaller reporting company” as defined in the Exchange Act, and have
elected and expect to continue to elect to take advantage of certain of the scaled disclosures available to smaller reporting
companies, including reduced disclosure obligations regarding executive compensation” for additional information on
scaled disclosure requirements.

We are and expect to continue to be a “smaller reporting company” as defined in the Exchange Act, and have elected
and expect to continue to elect to take advantage of certain of the scaled disclosures available to smaller reporting
companies, including reduced disclosure obligations regarding executive compensation.

While we are no longer an EGC, we are and expect to continue to be a “smaller reporting company” as defined in the
Exchange Act, and have elected and expect to continue to elect to take advantage of certain of the scaled disclosures
available to smaller reporting companies, including reduced disclosure obligations regarding executive compensation.
These exemptions and reduced disclosures in our SEC filings due to our status as a smaller reporting company also mean
our auditors are not required to audit our internal control over financial reporting for so long as we report less than $100
million in annual revenues for the most recent fiscal year and may make it harder for investors to analyze our results of
operations and financial prospects. We cannot predict if investors will find our common stock less attractive because we
may rely on these exemptions. If some investors find our common stock less attractive as a result, there may be a less
active trading market for our common stock and our common stock price may be more volatile. We will remain a smaller
reporting company until our public float exceeds $250 million or our annual revenues exceed $100 million with a public
float greater than $700 million.

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

As a public company, we incur significant legal, accounting and other expenses that we did not incur as a private company.
In addition, the Sarbanes-Oxley Act and rules subsequently implemented by the SEC and Nasdaq have imposed various
requirements on public companies, including establishment and maintenance of effective disclosure and financial controls
and corporate governance practices. Our management and other personnel devote a substantial amount of time to these
compliance initiatives. These rules and regulations have significantly increased our legal and financial

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compliance costs and we anticipate that these activities will become more time-consuming and costly over time now that
we no longer qualify as an EGC.

Pursuant to Section 404 of the Sarbanes-Oxley Act, we will be required to furnish a report by our management on our
internal control over financial reporting. Our independent registered public accounting firm will not be required to formally
attest to the effectiveness of our internal control over financial reporting pursuant to Section 404 of the Sarbanes-Oxley Act
until the date we report at least $100 million in annual revenues and have a public float of at least $75 million for the most
recent fiscal year or have a public float of at least $700 million for the most recent fiscal year. To achieve compliance with
Section 404 within the prescribed period, we are engaged in a process to document and evaluate our internal control over
financial reporting, which is both costly and challenging. In this regard, we will need to continue to dedicate internal
resources, engage outside consultants and adopt a detailed work plan to assess and document the adequacy of internal
control over financial reporting, continue steps to improve control processes as appropriate, validate through testing that
controls are functioning as documented and implement a continuous reporting and improvement process for internal
control over financial reporting. Despite our efforts, there is a risk that neither we nor our independent registered public
accounting firm will be able to conclude within the prescribed timeframe that our internal control over financial reporting
is effective as required by Section 404. This could result in an adverse reaction to the trading price of our common stock in
the financial markets due to a loss of confidence in the reliability of our financial statements.

If we fail to maintain an effective system of internal control over financial reporting, we may not be able to accurately
report our financial results or prevent fraud. As a result, stockholders could lose confidence in our financial and other
public reporting, which would harm our business and the trading price of our common stock.

Effective internal controls over financial reporting are necessary for us to provide reliable financial reports and, together
with adequate disclosure controls and procedures, are designed to prevent fraud. Any failure to implement required new or
improved controls, or difficulties encountered in their implementation could cause us to fail to meet our reporting
obligations. In addition, any testing by us conducted in connection with Section 404, or any subsequent testing by our
independent registered public accounting firm, may reveal deficiencies in our internal controls over financial reporting that
are deemed to be material weaknesses or that may require prospective or retroactive changes to our financial statements or
identify other areas for further attention or improvement. Inferior internal controls could also cause investors to lose
confidence in our reported financial information, which could have a negative effect on the trading price of our stock.

We are required to disclose changes made in our internal controls and procedures on a quarterly basis and our management
will be required to assess the effectiveness of these controls annually. However, for as long as we are a “smaller reporting
company”, our independent registered public accounting firm will not be required to attest to the effectiveness of our
internal controls over financial reporting pursuant to Section 404. We will qualify as a “smaller reporting company” if the
market value of our common stock held by non-affiliates is below $250 million (or $700 million if our annual revenue is
less than $100 million) as of June 30 in any given year. An independent assessment of the effectiveness of our internal
controls over financial reporting could detect problems that our management’s assessment might not. Undetected material
weaknesses in our internal controls over financial reporting could lead to financial statement restatements and require us to
incur the expense of remediation.

We have broad discretion in the use of our existing cash, cash equivalents and marketable securities and may not use
them effectively.

Our management has broad discretion in the application of our existing cash, cash equivalents and marketable securities.
Because of the number and variability of factors that will determine our use of our existing cash and cash equivalents, their
ultimate use may vary substantially from their currently intended use. Our management might not apply our existing cash
and cash equivalents in ways that ultimately increase the value of your investment. The failure by our management to apply
these funds effectively could harm our business.

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Anti-takeover provisions under our charter documents and Delaware law could delay or prevent a change of control
which could limit the market price of our common stock and may prevent or frustrate attempts by our stockholders to
replace or remove our current management.

Our amended and restated certificate of incorporation and amended and restated bylaws contain provisions that could delay
or prevent a change of control of our company or changes in our board of directors that our stockholders might consider
favorable. Some of these provisions include:

● a board of directors divided into three classes serving staggered three-year terms, such that not all members of the

board will be elected at one time;

● a prohibition on stockholder action through written consent, which requires that all stockholder actions be taken

at a meeting of our stockholders;

● a requirement that special meetings of stockholders be called only by the chairman of the board of directors, the

chief executive officer, or by a majority of the total number of authorized directors;

● advance notice requirements for stockholder proposals and nominations for election to our board of directors;

● a requirement that no member of our board of directors may be removed from office by our stockholders except
for cause and, in addition to any other vote required by law, upon the approval of not less than two thirds of all
outstanding shares of our voting stock then entitled to vote in the election of directors;

● a requirement of approval of not less than two thirds of all outstanding shares of our voting stock to amend any

bylaws by stockholder action or to amend specific provisions of our certificate of incorporation; and

● the authority of the board of directors to issue convertible preferred stock on terms determined by the board of

directors without stockholder approval and which convertible preferred stock may include rights superior to the
rights of the holders of common stock.

In addition, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the Delaware
General Corporation Law, which may prohibit certain business combinations with stockholders owning 15% or more of
our outstanding voting stock. These anti-takeover provisions and other provisions in our amended and restated certificate
of incorporation and amended and restated bylaws could make it more difficult for stockholders or potential acquirers to
obtain control of our board of directors or initiate actions that are opposed by the then current board of directors and could
also delay or impede a merger, tender offer or proxy contest involving our company. These provisions could also
discourage proxy contests and make it more difficult for you and other stockholders to elect directors of your choosing or
cause us to take other corporate actions you desire. Any delay or prevention of a change of control transaction or changes
in our board of directors could cause the market price of our common stock to decline.

If securities or industry analysts publish inaccurate or unfavorable research about our business, our stock price and
trading volume could decline.

The trading market for our common stock depends in part on the research and reports that securities or industry analysts
publish about us or our business. If one or more of the analysts who covers us downgrades our stock or publishes
inaccurate or unfavorable research about our business, our stock price may decline. If one or more of these analysts ceases
coverage of our company or fails to publish reports on us regularly, demand for our stock could decrease, which might
cause our stock price and trading volume to decline.

We may be subject to securities litigation, which is expensive and could divert management attention.

The market price of our common stock may be volatile. The stock market in general, and Nasdaq and biopharmaceutical
companies in particular, have experienced extreme price and volume fluctuations that have often been unrelated or

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disproportionate to the operating performance of these companies. In the past, companies that have experienced volatility
in the market price of their stock have been subject to securities class action litigation. We may be the target of this type of
litigation in the future. Securities litigation against us could result in substantial costs and divert our management’s
attention from other business concerns, which could seriously harm our business.

Our amended and restated bylaws contain certain exclusive forum provisions requiring that substantially all disputes
between us and our stockholders be resolved in certain judicial forums, which could limit our stockholders’ ability to
obtain a favorable judicial forum for disputes with us or our directors, officers or employees.

Our amended and restated bylaws provide that the Court of Chancery of the State of Delaware will be the exclusive forum
for any derivative action or proceeding brought on our behalf, any action asserting a breach of fiduciary duty, any action
asserting a claim against us arising pursuant to the Delaware General Corporation Law, our certificate of incorporation or
our bylaws, any action to interpret, apply, enforce, or determine the validity of our certificate of incorporation or bylaws, or
any action asserting a claim against us that is governed by the internal affairs doctrine. In addition, our amended and
restated bylaws contain a provision by virtue of which, unless we consent in writing to the selection of an alternative
forum, the U.S. District Court for the District of Massachusetts will be the exclusive forum for any complaint asserting a
cause of action arising under the Securities Act. In addition, our amended and restated bylaws provide that any person or
entity purchasing or otherwise acquiring any interest in shares of our common stock is deemed to have notice of and
consented to the foregoing provisions, however, stockholders cannot and will not be deemed to have waived compliance
with federal securities laws and the rules and regulations thereunder. We have chosen the U.S. District Court for the
District of Massachusetts as the exclusive forum for such causes of action because our principal executive offices are
located in Cambridge, Massachusetts. Some companies that have adopted similar federal district court forum selection
provisions are currently subject to a suit in the Court of Chancery of the State of Delaware brought by stockholders who
assert that the federal district court forum selection provision is not enforceable. While the Delaware Supreme Court ruled
in March 2020 that federal forum selection provisions purporting to require claims under the Securities Act be brought in
federal court are “facially valid” under Delaware law, there is uncertainty as to whether other courts will enforce our
federal forum selection provision, and we may incur additional costs of litigation should such enforceability be challenged.
If the federal forum selection provision is otherwise found inapplicable to, or unenforceable in respect of, one or more of
the specified actions or proceedings, we may incur additional costs, which could have an adverse effect on our business,
financial condition or results of operations. We recognize that the federal district court forum selection clause may impose
additional litigation costs on stockholders who assert the provision is not enforceable and may impose more general
additional litigation costs in pursuing any such claims, particularly if the stockholders do not reside in or near the
Commonwealth of Massachusetts. Additionally, the choice of forum provision may limit a stockholder’s ability to bring a
claim in a judicial forum that it finds favorable for disputes with us or our directors, officers or other employees, which
may discourage such lawsuits against us and our directors, officers and other employees. Alternatively, if a court were to
find the choice of forum provision contained in our amended and restated bylaws to be inapplicable or unenforceable in an
action, we may incur additional costs associated with resolving such action in other jurisdictions, which could adversely
affect our business and financial condition.

We have issued a substantial number of warrants and equity awards from our equity plans which are exercisable into
shares of our common stock which could result in substantial dilution to the ownership interests of our existing
stockholders.

As of December 31, 2023, approximately 9,988,156 shares of our common stock were reserved for issuance upon exercise
or conversion of outstanding warrants. Additionally, 9,390,505 shares of our common stock were reserved for issuance
upon exercise of outstanding stock options and vested restricted stock units. The exercise or conversion of these securities
will result in a significant increase in the number of outstanding shares and substantially dilute the ownership interests of
our existing stockholders. The shares underlying the equity awards from our equity plans are registered on a Form S-8
registration statement. As a result, upon vesting these shares can be freely exercised and sold in the public market upon
issuance, subject to volume limitations applicable to affiliates. The exercise of options and the subsequent sale of the
underlying common stock could cause a decline in our stock price. As of December 31, 2023, we also have 19,534,997
shares of our common stock reserved for issuance upon exercise of pre-funded warrants, which are already included in our
calculation of our weighted average common shares outstanding.

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Sales of a substantial number of shares of our common stock in the public market could cause our stock price to fall.

The sales of a substantial number of the shares and/or the exercise and sale of a substantial number of the pre-funded
warrants in the public market or the perception that these sales might occur could depress the market price of our common
stock and could impair our ability to raise capital through the sale of additional equity securities. We are unable to predict
the effect that sales may have on the prevailing market price of our common stock. In addition, the sale of substantial
amounts of our common stock could adversely impact the price of our common stock. The sale, or the availability for sale,
of a large number of shares of our common stock in the public market could cause the price of our common stock to
decline. As of December 31, 2023, 8,154,695 of the 27,689,692 pre-funded warrants have been exercised.

The sale or issuance of our common stock to, or through, Jefferies may cause significant dilution and the sale of the
shares of common stock acquired by Jefferies, or the perception that such sales may occur, could cause the price of our
common stock to fall.

On November 14, 2022, we entered into a sales agreement with Jefferies LLC (“Jefferies”), pursuant to which we may
offer and sell our common stock, subject to certain limitations in the sales agreement and compliance with applicable law,
at any time throughout the term of the sales agreement. The number of shares that are sold by Jefferies after delivering a
placement notice will fluctuate based on the market price of the common stock during the sales period and limits we set
with Jefferies. Because the price per share of each share sold will fluctuate based on the market price of our common stock
during the sales period, it is not possible at this stage to predict the number of shares that will be ultimately issued. Sales to,
or through, Jefferies by us could result in substantial dilution to the interests of other holders of our common stock.
Additionally, the sale of a substantial number of shares of our common stock, or the anticipation of such sales, could make
it more difficult for us to sell equity or equity-related securities in the future at a time and at a price that we might
otherwise wish to effect sales.

From January 1, 2023 through December 31, 2023, we have sold 619,290 shares of common stock through the Jefferies
sales agreement.

Item 1B. Unresolved Staff Comments

None.

Item 1C. Cybersecurity

Cyber Risk Management and Strategy

We have processes for assessing, identifying and managing cybersecurity risks, which are informed by industry standards
and built into our overall enterprise risk management function and are designed to help protect our information assets and
operations from internal and external cyber threats, and to protect employee, collaborator and patient information from
unauthorized access or attack.

We maintain a team of internal and external information technology specialists who are responsible for the design,
implementation, and operation of our information technology ecosystem and cybersecurity governance processes. We
engage with certain external parties, including consultants, computer security firms and risk management advisors, peer
companies, and industry groups in an effort to enhance our cybersecurity oversight and risk management strategy. We also
use security technologies, including third-party solutions and monitoring tools that are designed to identify and mitigate
cybersecurity risks. Further, we regularly engage third parties to conduct penetration testing, security assessments and
tabletop exercises. We also engage a virtual chief information security officer (“vCISO”) to support and advise on our
cybersecurity program. We have a process to consider the internal risk oversight programs of critical third-party service
providers before engagement, including through security questionnaires and contractual requirements, as appropriate. In
addition, in an effort to deter and detect cyber threats, we have implemented an annual training program to provide
employees with data protection, cybersecurity and incident response and prevention training.

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We have not identified any cybersecurity incidents or threats that have materially affected us or are reasonably likely to
materially affect us, including our business strategy, results of operations, or financial condition. However, like other
companies in our industry, we and our third-party vendors have from time to time experienced threats and security
incidents that could affect our information or systems. For more information, please see the section entitled “Risk Factors.”

Governance Related to Cybersecurity Risks
The Audit Committee of our Board of Directors provides direct oversight over cybersecurity risk and provides updates to
the Board of Directors regarding such oversight. The Audit Committee receives periodic updates from management,
including from our Vice President, Information Technology, or the VP of IT, regarding cybersecurity matters, such as
relevant cybersecurity risk assessments, as applicable. We have established a process for the Audit Committee to be
notified in the event of significant cybersecurity threats or incidents.

The VP of IT leads the operational oversight of company-wide cybersecurity strategy, policies, processes, and support
staff. Additionally, the VP of IT works across all relevant departments to assess and help prepare us and our employees to
address cybersecurity risks. The VP of IT reports and provides regular updates to the Chief Operations Officer and Chief
Financial Officer on the cybersecurity program as well as periodic updates to executive management, as needed. Our VP of
IT has worked in the information technology field for over 19 years at biotechnology companies including publicly-traded
organizations.

Item 2. Properties

Our corporate headquarters and operations are located in Cambridge, Massachusetts. In March 2015, we entered into a
lease of laboratory and office space at 620 Memorial Drive in Cambridge, Massachusetts. Our amended lease expired in
September 2023. This space was sublet from February 1, 2021 to August 31, 2023.

In November 2019, we entered into a lease of laboratory and office space at 301 Binney Street in Cambridge,
Massachusetts to be used as our new corporate headquarters. We were involved in the construction and design of the space.
The expiration date is in August 2025 and we have the option to extend the term by two years. We believe that our existing
facilities are adequate to meet our current needs, and that suitable additional space will be available as and when needed.

Item 3. Legal Proceedings

From time to time, we are subject to various legal proceedings and claims that arise in the ordinary course of our business
activities. Although the results of litigation and claims cannot be predicted with certainty, as of the date of this Annual
Report, we do not believe we are party to any claim or litigation the outcome of which, if determined adversely to us,
would individually or in the aggregate be reasonably expected to have a material adverse effect on our business. Regardless
of the outcome, litigation can have an adverse impact on us because of defense and settlement costs, diversion of
management resources and other factors.

Item 4. Mine Safety Disclosures

Not applicable.

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PART II

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

Market Information

Our common stock is traded on the Nasdaq Global Select Market under the symbol “SRRK”. Trading of our common stock
commenced on May 24, 2018, following the completion of our IPO. Prior to that time, there was no established public
trading market for our common stock.

Stockholders

As of March 14, 2024, there were approximately seven stockholders of record of our common stock. This number does not
include beneficial owners whose shares are held in street name.

Dividends

We have never declared or paid any dividends to our stockholders since our inception and we do not plan to declare or pay
cash dividends in the foreseeable future. We currently anticipate that we will retain all available funds and any future
earnings for the operation and expansion of our business. Furthermore, our ability to pay cash dividends is currently
restricted by the terms of our debt facility with Oxford and SVB. Any future determination related to dividend policy will
be made at the discretion of our board of directors and will depend on, among other factors, our results of operations,
financial condition, capital requirements, contractual restrictions, business prospects and other factors our board of
directors may deem relevant. Investors should not purchase our common stock with the expectation of receiving cash
dividends.

Equity Compensation Plans

The information required under this item is incorporated herein by reference to Item 12 of Part III of this Annual Report,
such information to be provided in the Company’s definitive proxy statement pursuant to Regulation 14A, which proxy
statement will be filed with the SEC not later than 120 days after the close of the Company’s fiscal year ended December
31, 2023.

Unregistered Sales of Securities

Not applicable.

Issuer Purchases of Equity Securities

None.

Item 6. Reserved

Not applicable.

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The information contained in this section has been derived from our consolidated financial statements and should be read
together with our consolidated financial statements and related notes included elsewhere in this Annual Report on Form
10-K. This Annual Report on Form 10-K contains forward-looking statements within the meaning of Section 27A of the
Securities Act of 1933, as amended, and Section 21E of the Securities and Exchange Act of 1934, as amended, the
“Exchange Act” and are subject to the “safe harbor” created by those sections. In particular, statements contained in this
Annual Report on Form 10-K that are not historical facts, including, but not limited to statements regarding our future
expectations, plans and prospects, including without limitation, our expectations regarding the potential of the TGFβ
program, the potential of apitegromab as a therapy in SMA and the timeline for and progress in developing apitegromab,
the potential of SRK-181 as a cancer immunotherapy and the timeline for and progress in developing SRK-181, the
potential for our anti-myostatin program as a therapy in cardiometabolic disorders, and liquidity, constitute forward-
looking statements and are made under these safe harbor provisions. Some of the forward-looking statements can be
identified by the use of forward-looking terms such as "believes," "expects," "may," "will," "should," "could," "seek,"
"intends," "plans," "estimates," "anticipates," or other comparable terms. Forward-looking statements involve inherent
risks and uncertainties, which could cause actual results to differ materially from those in the forward-looking statements.
We caution readers not to place undue reliance upon any such forward-looking statements, which speak only as of the date
made. We urge you to consider the risks and uncertainties discussed in greater detail under the heading "Risk Factors"
elsewhere in this Annual Report on Form 10-K in evaluating our forward-looking statements. We have no plans to update
our forward-looking statements to reflect events or circumstances after the date of this report. As a result of many factors,
including those factors set forth under the heading "Risk Factors" elsewhere in this Annual Report on Form 10-K, our
actual results could differ materially from the results described in or implied by the forward-looking statements contained
in the following discussion and analysis.

Overview

We are a late-stage biopharmaceutical company focused on the discovery, development, and delivery of innovative
medicines for the treatment of serious diseases in which signaling by protein growth factors plays a fundamental role. As a
global leader in transforming growth factor beta (“TGFβ”) superfamily biology, our novel understanding of the molecular
mechanisms of growth factor activation enabled us to develop a proprietary platform for the discovery and development of
monoclonal antibodies that locally and selectively target the precursor, or latent, forms of growth factors. By targeting the
signaling proteins at the cellular level and acting in the disease microenvironment, we believe we may avoid the historical
dose-limiting safety challenges associated with inhibiting growth factors for therapeutic effect. We believe our focus on
biologically validated growth factors may facilitate a more efficient development path.

Based on this proprietary and scalable technology platform, we are building a growing portfolio of novel product
candidates with the aim of transforming the lives of patients suffering from a wide range of serious diseases, including
neuromuscular disorders, cardiometabolic disorders, cancer, fibrosis and iron-restricted anemia. We have discovered and
progressed the development of:

● Apitegromab, an investigational, fully human monoclonal antibody that inhibits myostatin activation by

selectively binding the pro- and latent forms of myostatin in skeletal muscle and is being developed for the
treatment of SMA. We also believe apitegromab could have potential in the treatment of other neuromuscular
disorders where the inhibition of myostatin may be beneficial.

● SRK-439, a novel, preclinical, investigational myostatin inhibitor that has high invitro affinity for pro- and latent
myostatin and maintains myostatin specificity and is being developed for the treatment of cardiometabolic
disorders.

● SRK-181, an inhibitor of the activation of latent TGFβ1, that is being developed for the treatment of cancers that

are resistant to anti-PD-(L)1 antibody therapies.

● Potent and selective inhibitors of the activation of TGFβ for the treatment of fibrotic diseases. We are advancing
multiple antibody profiles toward product candidate selection including antibodies that selectively inhibit the
activation of latent TGFβ1 in the context of fibrotic extracellular matrix and that avoid perturbing TGFβ1
presented by cells of the immune system.

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● Additional discovery and early preclinical programs related to the selective modulation of growth factor signaling

including BMP6 and other growth factors.

Our first product candidate, apitegromab, is a highly selective, fully human, monoclonal antibody with a unique
mechanism of action that results in inhibition of the activation of the growth factor, myostatin, in skeletal muscle.
Apitegromab is being developed as a potential first muscle-targeted therapy for the treatment of SMA. We are conducting
SAPPHIRE, a pivotal Phase 3 clinical trial to evaluate the efficacy and safety of apitegromab in patients with
nonambulatory Type 2 and Type 3 SMA (which is estimated to represent the majority of the current prevalent SMA patient
population in the U.S. and Europe). We completed enrollment of SAPPHIRE in 2023, with the top-line data readout
expected in the fourth quarter of 2024. If successful and if apitegromab is approved, we expect to initiate a commercial
product launch in 2025. 

Apitegromab was evaluated in our Phase 2 TOPAZ proof-of-concept clinical trial for the treatment of patients with Type 2
and Type 3 SMA. Positive 12-month top-line results were initially announced in April 2021. The Company has
subsequently presented data from the TOPAZ trial over 24-months (June 2022) and 36-months (July 2023), which showed
that continued treatment with apitegromab over the extended period was associated with substantial and sustained
improvement in motor function, and patient-reported outcomes in patients with nonambulatory Types 2 and 3 SMA
receiving an SMN therapy. The FDA granted fast track designation, rare pediatric disease designation and orphan drug
designation to apitegromab for the treatment of SMA in May 2021, August 2020 and March 2018, respectively. The
European Medicines Agency (“EMA”) granted PRIME designation in March 2021 and the European Commission (“EC”)
granted orphan medicinal product designation in December 2018 to apitegromab for the treatment of SMA.

In October 2023, we announced an expansion of our therapeutic focus into cardiometabolic disorders by advancing our
anti-myostatin program with SRK-439, a novel, fully human anti-myostatin monoclonal antibody, for evaluation in
cardiometabolic disorders, including obesity. We are developing SRK-039 towards a potential IND submission in 2025. To
inform the development of SRK-439, we plan to initiate a Phase 2 proof-of-concept trial of apitegromab in combination
with GLP-1 receptor agonist (GLP-1 RA) in 2024 with data expected in mid-2025. 

Our second product candidate, SRK-181, a highly selective inhibitor of the activation of latent TGFβ, is being developed
for the treatment of cancers that are resistant to CPI therapies, such as anti-PD-1 or anti-PD-L1 antibody therapies (referred
to together as anti-PD-(L)1 antibody therapies). SRK-181 was evaluated in our Phase 1 DRAGON proof-of-concept
clinical trial in patients with locally advanced or metastatic solid tumors that exhibit resistance to anti-PD-(L)1 antibody
therapies. We completed enrollment of the DRAGON trial in December 2023. This two-part clinical trial consists of a dose
escalation portion (Part A) and a dose expansion portion evaluating SRK-181 in combination with an approved anti-PD-
(L)1 antibody therapy (Part B). Part B commenced in 2021 and includes the following active cohorts: urothelial carcinoma,
cutaneous melanoma, non-small cell lung cancer, ccRCC, and HNSCC. Safety, efficacy and biomarker data were presented
in November 2023 at the SITC 38th Annual Meeting. We believe that the DRAGON trial achieved its study objectives by
showing objective, durable clinical responses in patients with ccRCC resistant to PD-1 therapy above what is expected
from continuing PD-1 alone. It is anticipated that emerging data from the DRAGON trial will be presented at medical
meetings in the future.

Using our innovative approach and proprietary platform, we are creating a pipeline of novel product candidates that
selectively modulate the activation of growth factors implicated in a variety of serious diseases, including neuromuscular
disorders, cardiometabolic disorders, cancer, fibrosis, and iron-restricted anemia. Our proprietary platform is designed to
generate highly selective antibodies that target the growth factor’s latent precursor form prior to its activation within the
disease microenvironment, or tissue where it is localized. Our structural insights and unique antibody discovery capabilities
can also be applied to other protein classes beyond growth factors, with an aim of generating differentiated candidates
targeting cell surface receptors such as immune cell receptors or G-protein coupled receptors, where selectivity remains
challenging.

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Since inception, we have incurred significant operating losses. Our net losses were $165.8 million for the year ended
December 31, 2023. As of December 31, 2023, we had an accumulated deficit of $676.4 million. We expect to continue to
incur significant expenses and operating losses for the foreseeable future in performing our ongoing activities, as we:

● continue development activities for apitegromab, including the conduct of our Phase 3 SAPPHIRE pivotal

clinical trial in SMA, ONYX, our long-term extension study for patients from both the TOPAZ and SAPPHIRE
studies and the associated drug supply;

● continue research and development activities for SRK-181, including the conduct of our Phase 1 DRAGON

proof-of-concept clinical trial;

● continue research and development activities for our cardiometabolic program, including the proof-of-concept

Phase 2 trial with apitegromab and advancing SRK-439 towards a potential IND submission in 2025;
● continue to discover, validate and develop additional product candidates through the use of our proprietary

platform;

● maintain, expand and protect our intellectual property portfolio;

● hire additional research, development, commercial and other business personnel; and
● continue to build the infrastructure to support our operations as a public company.

To date, we have not generated any revenue from product sales. If we successfully complete clinical development and
obtain regulatory approval for apitegromab, SRK-181, SRK-439 or any of our future product candidates, we may generate
revenue in the future from product sales. In addition, if we obtain regulatory approval for apitegromab, SRK-181, SRK-439
or any of our future product candidates, we expect to incur significant expenses related to developing our
commercialization capabilities to support product sales, marketing and distribution activities.

Financial Operations Overview

Revenue

No revenues have been recorded from the sale of any commercial product. Revenue generation activities have been limited
to collaborations, containing research services and the issuance of a license. The Gilead Collaboration Agreement was
executed on December 19, 2018 (the “Effective Date”) and we began recognizing associated revenue in
2019. Under the Gilead Collaboration Agreement, Gilead had exclusive options to license worldwide rights to product
candidates that emerged from three of our TGFβ programs (each a “Gilead Program”). Each option could have been
exercised by Gilead at any time from the Effective Date through a date that was 90 days following the expiration of the
Research Collaboration Term for a given Gilead Program (no later than March 19, 2022), or until termination of the Gilead
Program, whichever was earlier (the “Option Exercise Period”). On January 6, 2022, Gilead agreed to terminate its option
exercise period for all programs and the rights to the respective antibodies reverted to us.

Revenue associated with the research and development and license performance obligations relating to the Gilead
Programs was recognized as revenue using an input method as the research and development services were provided over
the research term, which was during the period January 2019 through December 2021. The amounts of revenue allocated to
the three material rights provided by the options was to be deferred on our consolidated balance sheet until either exercise
or termination of the respective options. In January 2022, Gilead agreed that its option exercise period for all programs had
been terminated. The remaining $33.2 million of deferred revenue associated with the materials rights provided by the
options was recognized as revenue in January 2022. As a result, by January 31, 2022, all revenue related to the Gilead
Collaboration Agreement had been recognized.

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Operating Expenses

Research and Development

Research and development expenses consist primarily of costs incurred for our research and development activities,
including our product candidate discovery efforts, preclinical studies, manufacturing, and clinical trials under our research
programs, which include:

● employee-related expenses, including salaries, benefits and equity-based compensation expense for our research

and development personnel;

● expenses incurred under agreements with third parties that conduct research and development and preclinical

activities on our behalf;

● expenses incurred under agreements related to our clinical trials, including the costs for investigative sites and

contract research organizations (“CROs”), that conduct our clinical trials;

● manufacturing process-development, manufacturing of clinical supplies and technology-transfer expenses;
● consulting and professional fees related to research and development activities;

● costs of purchasing laboratory supplies and non-capital equipment used in our internal research and development

activities;

● costs related to compliance with clinical regulatory requirements; and
● facility costs and other allocated expenses, which include expenses for rent and maintenance of facilities,

insurance, depreciation and other supplies.

Research and development costs are expensed as incurred. Costs for certain activities are recognized based on an
evaluation of the progress to completion of specific tasks. Nonrefundable advance payments for research and development
goods and services to be received in the future from third parties are deferred and capitalized. The capitalized amounts are
expensed as the related services are performed.

A significant portion of our research and development costs have been external costs, which we track on a program-by-
program basis after a clinical product candidate has been identified. However, we do not allocate our internal research and
development expenses, consisting primarily of employee-related costs, depreciation and other indirect costs, on a program-
by-program basis as they are deployed across multiple projects.

Research and development activities are central to our business model. Product candidates in later stages of clinical
development generally have higher development costs than those in earlier stages of clinical development, primarily due to
the increased size and duration of later-stage clinical trials, as well as the associated clinical trial material requirements. We
expect research and development costs for our product candidates to continue to be substantial for the foreseeable future as
the development programs progress. However, we do not believe that it is possible at this time to accurately project total
program-specific expenses through commercialization. There are numerous factors associated with the successful
commercialization of any of our product candidates, including future trial design and various regulatory requirements,
many of which cannot be determined with accuracy at this time based on our stage of development. Additionally, future
commercial and regulatory factors beyond our control will impact our clinical development programs and plans.

The successful development of apitegromab, SRK-181, SRK-439 and any future product candidates is uncertain.
Accordingly, at this time, we cannot reasonably estimate or know the nature, timing and estimated costs of the efforts that
will be necessary to complete the remainder of the development of apitegromab, SRK-181, SRK-439 and any future
product candidates. We are also unable to predict when, if ever, material net cash inflows will commence from the sale

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of our product candidates, if approved. This is due to the numerous risks and uncertainties associated with developing
product candidates, including the uncertainty of:

● the scope, progress, outcome and costs of our preclinical development activities, clinical trials and other research

and development activities;

● establishing an appropriate safety profile;
● successful enrollment in and completion of clinical trials;
● whether our product candidates show safety and efficacy in our clinical trials;
● receipt of marketing approvals from applicable regulatory authorities, if any;

● establishing commercial manufacturing capabilities or making arrangements with third-party manufacturers;
● obtaining and maintaining patent and trade secret protection and regulatory exclusivity for our product

candidates;

● significant and changing government regulation;

● commercializing the product candidates, if and when approved, whether alone or in collaboration with others; and

● continued acceptable safety profile of the products following any regulatory approval.

A change in the outcome of any of these variables with respect to the development of apitegromab, SRK-181, SRK-439 or
any of our future product candidates could significantly change the costs and timing associated with the development of
that product candidate.

General and Administrative

General and administrative expenses consist primarily of employee-related expenses, including salaries, benefits and
equity-based compensation expenses for personnel in executive, finance, business development, investor relations, legal,
information technology and human resources functions. Other significant general and administrative expenses include
facility costs not otherwise included in research and development expenses, legal fees relating to patent and corporate
matters and fees for accounting, consulting services, and corporate expenses.

Other Income (Expense), Net

Other income (expense), net consists primarily of interest income earned on our cash, cash equivalents and marketable
securities, partially offset by interest expense incurred on our debt facility, including amortization of debt discount and debt
issuance costs.

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Results of Operations

Comparison of the Years Ended December 31, 2023 and 2022

The following table summarizes our results of operations for the years ended December 31, 2023 and 2022 (in thousands,
except percentages):

Revenue
Operating expenses:

Research and development
General and administrative
Total operating expenses

Loss from operations
Other income (expense), net
Net loss

Revenue

Year Ended December 31, 

2023

2022

$

 — $  33,193

Change

$
$ (33,193)

%  
 (100.0)%

 121,900
 49,395
 171,295
   (171,295)
 5,506

 (2,544)
 6,276
 3,732
   (36,925)
 5,638
$ (165,789) $ (134,502) $ (31,287)

 124,444
 43,119
 167,563
   (134,370)
 (132)

 (2.0)%
 14.6 %
 2.2 %
 27.5 %
 (4,271.2)%
 23.3 %

Revenue was $0 and $33.2 million for the years ended December 31, 2023 and 2022, respectively. The revenue for the year
ended December 31, 2022 was related to the Gilead Collaboration Agreement executed in December 2018. Upon Gilead’s
termination of its option exercise period for all programs, revenue of $33.2 million attributable to the material rights was
recognized in January 2022. All revenue related to the Gilead Collaboration Agreement had been fully recognized by
January 31, 2022.

Operating Expenses

Research and Development

Research and development expense was $121.9 million for the year ended December 31, 2023 compared to $124.4 million
for the year ended December 31, 2022, a decrease of $2.5 million, or 2.0%. The following table summarizes our research
and development expense for the years ended December 31, 2023 and 2022 (in thousands, except percentages):

External costs by program:

Apitegromab
SRK-181
Other early programs and unallocated costs

Total external costs

Internal costs:

Employee compensation and benefits
Facility and other

Total internal costs

Total research and development expense

Year Ended December 31, 

2023

2022

Change

$

%

$  40,701
 14,200
 5,818
 60,719

$  48,044
 12,462
 6,175
 66,681

 44,594
 16,587
 61,181
$  121,900

 41,370
 16,393
 57,763
$  124,444

$

$

 (7,343)
 1,738
 (357)
 (5,962)

 3,224
 194
 3,418
 (2,544)

 (15.3)%
 13.9 %
 (5.8)%
 (8.9)%

 7.8 %
 1.2 %
 5.9 %
 (2.0)%

The decrease in research and development expense was primarily attributable to the following:

● A decrease in our external research and development costs of $6.0 million, which primarily consisted of:

o

$7.3 million decrease in costs associated with apitegromab primarily due a decrease in clinical drug
supply manufacturing driven by timing of clinical supply, partially offset by clinical trial costs,

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o

particularly the conduct of our Phase 3 SAPPHIRE clinical trial and ONYX, our long-term extension
study for patients from both the TOPAZ and SAPPHIRE studies;
$1.7 million increase in costs associated with SRK-181, due primarily to clinical trial costs and
associated purchases of pembrolizumab related to the Phase 1 DRAGON clinical trial, partially offset by
lower costs due to timing of clinical drug supply costs; and

o $0.4 million decrease in costs in other early development candidates and unallocated costs;
● $3.4 million increase in internal research and development costs, which was primarily driven by an increase in
employee compensation and benefits costs, including salaries and bonus, and an increase in temporary support,
partially offset by decreases in severance expense and non-cash equity-based compensation expense, including
for modifications of certain equity awards.

Total research and development expenses are expected to continue to be substantial, driven by employee compensation
costs and development costs associated with our clinical stage programs as we continue to advance our product candidates,
including apitegromab through our Phase 3 SAPPHIRE clinical trial in SMA and ONYX, our long-term extension study
for patients from both the TOPAZ and SAPPHIRE studies and costs associated with supporting our cardiometabolic
program, including our planned Phase 2 study of apitegromab and our preclinical program, SRK-439. Additionally, we will
continue to invest in our pipeline. We expect costs of our SRK-181 program to decrease, as we completed enrollment of the
Phase 1 DRAGON clinical trial in December 2023.

General and Administrative

General and administrative expense was $49.4 million for the year ended December 31, 2023 compared to $43.1 million
for the year ended December 31, 2022, an increase of $6.3 million or 14.6%. The increase was associated with employee
compensation and benefits costs including salaries, bonus, benefits and non-cash equity-based compensation expense
related to increased headcount, in addition to an increase in professional services costs. We expect general and
administrative expense to increase as we continue to invest in commercial readiness activities.

Other Income (Expense), Net

The change in other income (expense), net was primarily attributable to an increase in interest income earned due to higher
interest rates, partially offset by an increase in interest expense related to the Loan and Security Agreement, also due to
higher interest rates.

Liquidity and Capital Resources

Sources of Liquidity

Since our inception, we have not generated any product revenue and have incurred significant operating losses and
negative cash flows from our operations. We have funded our operations to date primarily with proceeds from the sale of
our convertible preferred stock and units in private placements before our IPO, and sale of our common stock through our
IPO in 2018, to Gilead in an exempt private placement, through multiple secondary public offerings and through at-the-
market (“ATM”) sales, as well as payments from our research collaborations and the Loan and Security Agreement entered
into in October 2020 and amended in November 2022 and April 2023 (see Note 13).

The following table provides information regarding our total cash, cash equivalents and marketable securities at
December 31, 2023 and December 31, 2022 (in thousands):

Cash and cash equivalents
Marketable securities

Total cash, cash equivalents and marketable securities

    December 31,     December 31, 

2023
$  101,855
 178,083
$  279,938

2022
$  103,275
 212,086
$  315,361

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During the year ended December 31, 2023, our cash, cash equivalents and marketable securities balance decreased by
$35.4 million. The change was primarily due to cash used to operate our business, including payments related to, among
other things, research and development and general and administrative expenses as we continued to invest in our product
candidates and supported our internal research and development efforts and made interest payments on our debt, partially
offset by proceeds from the sale of common stock (including our equity offering completed in October 2023) and exercises
of warrants and stock options.

Our current ATM program, established in November 2022, allows for the sale of shares of our common stock having an
aggregate offering price of up to $100 million. During the year ended and as of December 31, 2023, we sold 619,290
shares of our common stock through sales under our ATM program with Jefferies, LLC, and received $5.2 million in net
proceeds, after deducting commissions and fees. In October 2021, we sold 500,000 shares of our common stock through a
sale in our prior ATM program (in place between March 2021 and June 2022) and received $13.1 million in net proceeds,
after deducting commissions and fees.

On October 11, 2023, we entered into the Underwriting Agreement with J.P. Morgan Securities LLC, and Piper Sandler &
Co., as representatives of the several underwriters named therein, relating to the issuance and sale of an aggregate of
12,408,760 shares of our common stock at $6.85 per share. Pursuant to the Underwriting Agreement, we also granted the
Underwriters a 30-day option to purchase up to 1,861,314 additional shares in an amount equal to 15% of the securities
offered in the public offering (the “Option Shares”) of common stock. The Underwriters exercised in full their option to
purchase the Option Shares on October 12, 2023. Total proceeds of the transaction, including the Option Shares were
approximately $92.4 million, net of underwriting discounts and estimated offering expenses. The offering closed on
October 16, 2023.

In June 2022, we entered into a securities purchase agreement relating to the issuance and sale of an aggregate of
16,326,530 shares of our common stock, pre-funded warrants to purchase 25,510,205 shares of our common stock and
associated common warrants to purchase 10,459,181 shares of our common stock. Gross proceeds from the transaction
were $205.0 million. Upon the offering closing, we received $195.3 million in net proceeds, after deducting placement
agent fees and expenses and offering expenses.

In October 2020, we entered into an underwriting agreement relating to the issuance and sale of an aggregate of 3,717,948
shares of our common stock at $39.00 per share and pre-funded warrants to purchase 2,179,487 shares of our common
stock. The offering closed in November 2020 and we received $215.9 million in net proceeds, after deducting underwriting
discounts and commissions and offering expenses.

In October 2020, we entered into the Loan and Security Agreement with Oxford and SVB, which was amended in
November 2022, for $100 million of which $25.0 million from Tranche 1 was received in October 2020 and $25.0
million from Tranche 2 was received in December 2021 (Note 13).

In June and July 2019, we sold 3,450,000 shares of our common stock through an underwritten public offering. As a result
of the offering, we received aggregate net proceeds, after underwriting discounts and commissions and other offering
expenses, of $48.3 million.

In December 2018, we entered into the Gilead Collaboration Agreement pursuant to which we conducted research and
preclinical development activities relating to the diagnosis, treatment, cure, mitigation or prevention of diseases, disorders
or conditions, other than in the field of oncology in accordance with a pre-determined research plan. Pursuant to the Gilead
Collaboration Agreement, Gilead made non-refundable payments of $80.0 million, including an upfront payment and an
equity investment. In December 2019, we achieved a $25.0 million preclinical milestone for the successful demonstration
of efficacy in preclinical in vivo proof-of-concept studies, and subsequently received the associated payment in January
2020. Revenue was recognized during the period January 2019 through December 2021, as research and development
services were provided. All revenue related to the Gilead Collaboration Agreement had been fully recognized by January
31, 2022, upon the termination of Gilead’s option exercise period (Note 14).

During the year ended December 31, 2023, 8,154,695 of the Company’s pre-funded warrants were exercised. As of
December 31, 2023, the Company had 19,534,997 pre-funded warrants outstanding.

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During the year ended December 31, 2023, 471,025 of the Company’s common warrants were exercised. As of December
31, 2023, the Company had 9,998,156 common warrants outstanding.

Cash Flows

The following table provides information regarding our cash flows for the years ended December 31, 2023 and 2022 (in
thousands):

Year Ended December 31, 

2023

2022

Net cash used in operating activities
Net cash provided by (used in) investing activities
Net cash provided by financing activities

Net decrease in cash, cash equivalents and restricted cash

Net Cash Used in Operating Activities

$ (145,226) $  (132,694)
   (171,698)
 194,832
 (1,511) $  (109,560)

 41,141
 102,574

$

Net cash used in operating activities was $145.2 million for the year ended December 31, 2023, and consisted of our net
loss of $165.8 million, changes in our assets and liabilities of $10.6 million, partially offset by non-cash adjustments of
$31.2 million. The non-cash adjustments are primarily from equity-based compensation.

Net cash used in operating activities was $132.7 million for the year ended December 31, 2022, and consisted of our net
loss of $134.5 million, changes in our assets and liabilities of $34.4 million, partially offset by non-cash adjustments of
$36.2 million. The changes in our assets and liabilities include a $33.2 million change in deferred revenue related to the
Gilead collaboration, which relates to the recognition of revenue associated with the material rights provided by the
options. The non-cash adjustments are primarily from equity-based compensation.

Net Cash Provided by (Used in) Investing Activities

Net cash provided by investing activities was $41.1 million for the year ended December 31, 2023, compared to net cash
used in investing activities of $171.7 million for the year ended December 31, 2022. Net cash provided by and used in
investing activities for both periods was primarily associated with transactions involved in the routine management of our
marketable securities.

Net Cash Provided by Financing Activities

Net cash provided by financing activities was $102.6 million for the year ended December 31, 2023, compared to $194.8
million for the year ended December 31, 2022. Net cash provided by financing activities for the year ended December 31,
2023 was primarily attributable to net proceeds from an equity offering completed in October 2023. Net cash provided by
financing activities for the year ended December 31, 2022 was primarily attributable to net proceeds from an equity
offering completed in June 2022.

Funding Requirements

We expect our expenses to be substantial as we continue the research and development of apitegromab in SMA. In
addition, if we seek marketing approval for apitegromab, or any of our future product candidates, we expect to incur
significant commercialization expenses related to product sales, marketing, manufacturing and distribution. We expect to
continue to incur costs related to SRK-181 as we continue to treat patients who remain on the Phase 1 DRAGON trial. We
expect to incur costs to support our cardiometabolic program, including our planned Phase 2 trial of apitegromab and our
preclinical program, SRK-439. Additionally, we will support the development of our pipeline and any other preclinical
programs. Furthermore, we expect to continue to incur costs associated with operating as a public company.

We expect that our existing cash, cash equivalents, marketable securities will enable us to fund our operating expenses and
capital expenditure requirements into the second half of 2025. However, we will require additional capital in order

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to complete clinical development and commercialization for each of our current programs. We have based this estimate on
assumptions that may prove to be wrong, and we may use our available capital resources sooner than we currently expect.
Our future capital requirements will depend on many factors, including:

● the costs and timing of developing our product candidates and future product candidates, including costs

associated with apitegromab in our Phase 3 SAPPHIRE clinical in SMA and ONYX, our long-term extension
study in SMA for patients from both the TOPAZ and SAPPHIRE studies, our Phase 2 proof-of-concept trial for
apitegromab in our cardiometabolic program, our Phase 1 DRAGON clinical trial for SRK-181, and the costs and
timing of conducting future preclinical studies and clinical trials for SRK-439 or any other product candidates;
● the costs of future manufacturing of apitegromab, SRK-181, SRK-439 and any other future product candidates;
● the scope, progress, results and costs of discovery, preclinical development, laboratory testing and clinical trials

for other potential product candidates we may develop, if any;

● the costs of identifying and developing, or in-licensing or acquiring, additional product candidates and

technologies;

● the costs, timing and outcome of regulatory review of our product candidates;

● our ability to establish and maintain collaborations on favorable terms, if at all;

● the achievement of milestones or occurrence of other developments that trigger payments under any collaboration

agreements, license agreements, or other agreements we might have at such time;

● the costs of seeking marketing approvals for our product candidates that successfully complete clinical trials, if

any;

● the costs and timing of future commercialization activities, including product sales, marketing, manufacturing and

distribution, for any of our product candidates for which we receive marketing approval;

● the amount of revenue, if any, received from commercial sales of our product candidates, should any of our

product candidates receive marketing approval;

● the costs of preparing, filing and prosecuting patent applications, obtaining, maintaining and enforcing our

intellectual property rights and defending intellectual property-related claims;

● our headcount growth and associated costs as we expand our business operations and research and development

activities;

● the costs of supporting our infrastructure and facilities, including equipment and physical infrastructure to support

our research and development;

● the costs of operating as a public company; and
● the impact of adverse global economic conditions on our business, which may exacerbate the magnitude of the

factors discussed above.

Identifying potential product candidates and conducting preclinical studies and clinical trials is a time-consuming,
expensive and uncertain process that takes years to complete, and we may never generate the necessary data or results
required to obtain marketing approval and achieve product sales. In addition, our product candidates, if approved, may not
achieve commercial success. Accordingly, we will need to continue to rely on additional financing to achieve our business
objectives. Adequate additional financing may not be available to us on acceptable terms, or at all.

Until such time, if ever, as we can generate substantial product revenues, we expect to finance our cash needs through a
combination of equity offerings, debt financings, collaborations, strategic alliances and licensing arrangements. To the
extent that we raise additional capital through the sale of equity or convertible debt securities, common stockholder
ownership interests may be diluted, and the terms of these securities may include liquidation or other preferences that could
adversely affect the rights of a common stockholder. Additional debt financing, if available, may involve agreements that
include restrictive covenants that limit our ability to take specific actions, such as incurring additional debt, making capital
expenditures or declaring dividends, that could adversely impact our ability to conduct our business.

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If we raise funds through collaborations, strategic alliances or licensing arrangements with third parties, we may have to
relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or to grant
licenses on terms that may not be favorable to us. Market volatility or other factors could also adversely impact our ability
to access capital as and when needed. If we are unable to raise additional funds through equity or debt financings when
needed, we may be required to delay, limit, reduce or terminate our product development or future commercialization
efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market
ourselves.

Critical Accounting Estimates

This management’s discussion and analysis is based on our consolidated financial statements, which have been prepared in
accordance with U.S. generally accepted accounting principles. The preparation of these consolidated financial statements
requires us to make judgments and estimates that affect the reported amounts of assets, liabilities, revenues and expenses
and the disclosure of contingent assets and liabilities in our consolidated financial statements. We base our estimates on
historical experience, known trends and events and various other factors that we believe to be reasonable under the
circumstances, the results of which form the basis for making judgements 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. On an ongoing basis, we evaluate our judgments and estimates in light of changes in circumstances, facts
and experience. The effects of material revisions in estimates, if any, will be reflected in the consolidated financial
statements prospectively from the date of change in estimates. Our actual results may differ from these estimates under
different assumptions or conditions.

While our significant accounting policies are described in more detail in Note 2 to our consolidated financial statements
appearing elsewhere in this report, we believe that the following accounting estimates are those most critical to the
judgments used in the preparation of our consolidated financial statements. They involve a significant level of estimation
uncertainty and have had or are reasonably likely to have a material impact on our finance condition or result of operations.

Research and Development Expenses and related Accruals/Prepaids

As part of the process of preparing our consolidated financial statements, we are required to estimate our accrued expenses
as of each balance sheet date. This process involves reviewing open contracts and purchase orders, communicating with
our personnel and/or reviewing other third-party sources to identify the progress of services that has been performed on our
behalf, as well as invoices received and contracted costs. This contributes to estimating the level of service performed and
the associated cost incurred for the service when we have not yet been invoiced or otherwise notified of the actual cost.

The majority of our service providers invoice us monthly in arrears for services performed or when contractual milestones
are met. We make estimates of our accrued expenses as of each balance sheet date based on facts and circumstances known
to us at that time. We periodically confirm the accuracy of our estimates with the service providers and make adjustments if
necessary. The significant estimates in our accrued research and development expenses include the costs incurred for
services performed by our vendors in connection with research and development activities for which we have not yet been
invoiced. In certain instances, we prepay for services to be provided in the future. These amounts are expensed as the
services are performed.

We base our expenses related to research and development activities on our estimates of the services received and efforts
expended pursuant to quotes and contracts with vendors that conduct research and development on our behalf. The
financial terms of these agreements are subject to negotiation, vary from contract to contract and may result in uneven
payment flows. There may be instances in which payments made to our vendors will exceed the level of services provided
and result in a prepayment of the research and development expense. In accruing service fees, we estimate the time period
over which services will be performed and the level of effort to be expended in each period. If the actual timing of the
performance of services or the level of effort varies from our estimate, we adjust the accrual or prepaid balance
accordingly. Nonrefundable advance payments for goods and services that will be used in future research and

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development activities are expensed when the activity has been performed or when the goods have been received rather
than when the payment is made.

Although we do not expect our estimates to be materially different from amounts incurred, if our estimates of the status and
timing of services performed differ from the actual status and timing of services performed, it could result in us reporting
amounts that are too high or too low in any particular period. To date, there have been no material differences between our
estimates of such expenses and the amounts incurred.

The accrued research and development expenses at the end of each year are generally paid during the following year and
therefore the same estimates and assumptions do not continue to exist each year, although, as described above, the method
and procedures to develop those estimates and assumptions are generally consistent.

Revenue Recognition

No revenues have been recorded from the sale of any commercial product. Revenue generation activities have been limited
to collaborations, containing research services and the issuance of a license. Prior to January 2022, revenue was being
recognized related to the Gilead Collaboration Agreement which was executed in December 2018. We recognized
associated revenue between 2019 and 2021 over the period that research was performed under the collaboration and
recognized revenue attributable to the material rights provided by the options in January 2022. We account for revenue
under ASC Topic 606, Revenue from Contracts with Customers (“ASC 606”).

Under ASC 606, we recognize revenue when our customer obtains control of promised goods or services, in an amount
that reflects the consideration which we expect to receive in exchange for those goods or services. To determine the
appropriate amount of revenue to be recognized for arrangements determined to be within the scope of ASC 606, we
perform the following five steps: (i) identification of the contract(s) with the customer, (ii) identification of the promised
goods or services in the contract and determination of whether the promised goods or services are performance obligations,
(iii) measurement of the transaction price, (iv) allocation of the transaction price to the performance obligations, and (v)
recognition of revenue when (or as) we satisfy each performance obligation. We only apply the five-step model to contracts
when it is probable that we will collect the consideration we are entitled to in exchange for the goods or services we
transfer to our customer.

Identification of the Contract(s) with the Customer

We account for a contract with a customer that is within the scope of ASC 606 when all of the following criteria are met:
(i) the arrangement has been approved by the parties and the parties are committed to perform their respective obligations,
(ii) each party’s rights regarding the goods or services to be transferred can be identified, (iii) the payment terms for the
goods or services to be transferred can be identified, (iv) the arrangement has commercial substance and (v) collection of
substantially all of the consideration to which we will be entitled in exchange for the goods or services that will be
transferred to the customer is probable.

Identification of the Performance Obligations

Performance obligations are promised goods or services in a contract to transfer a distinct good or service to the customer.
Promised goods or services are considered distinct when: (i) the customer can benefit from the good or service on its own
or together with other readily available resources and (ii) the promised good or service is separately identifiable from other
promises in the contract. In assessing whether promised goods or services are distinct, we consider factors such as the stage
of development of the underlying intellectual property, the capabilities of our customer to develop the intellectual property
on their own and whether the required expertise is readily available. Arrangements that include rights to additional goods
or services that are exercisable at a customer’s discretion are generally considered options. We assess if these options
provide a material right to the customer and if so, they are considered performance obligations. The identification of
material rights requires judgments related to the determination of the value of the underlying license relative to the option
exercise price, including assumptions about technical feasibility and the probability of developing a candidate that would
be subject to the option rights.

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Determination of the Transaction Price

We estimate the transaction price based on the amount of consideration we expect to receive for transferring the promised
goods or services in the contract. The consideration may include both fixed consideration and variable consideration. At
the inception of each arrangement that includes variable consideration, we evaluate the amount of the potential payments
and the likelihood that the payments will be received. We utilize either the most likely amount method or expected value
method to estimate the transaction price based on which method better predicts the amount of consideration expected to be
received. If it is probable that a significant revenue reversal would not occur, the variable consideration is included in the
transaction price.

We evaluate whether development, regulatory, and commercial milestone payments are considered probable of being
reached and estimate the amount to be included in the transaction price using the most likely amount method. If it is
probable that a significant revenue reversal would not occur, the associated milestone value is included in the transaction
price. Milestone payments that are not within our control or the licensee’s control, such as regulatory approvals, are not
considered probable of being achieved until those approvals are received. At the end of each reporting period, we re-
evaluate the probability of achievement of such milestones and any related constraint, and if necessary, adjust our estimate
of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect
collaboration revenue and earnings in the period of adjustment.

For sales-based royalties, including milestone payments based on the level of sales, we determine whether the sole or
predominant item to which the royalties relate is a license. When the license is the sole or predominant item to which the
sales-based royalty relates, we recognize revenue at the later of: (i) when the related sales occur, or (ii) when the
performance obligation to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). To
date, we have not recognized any sales-based royalty revenue resulting from our arrangement.

Allocation of Transaction Price

We allocate the transaction price based on the estimated standalone selling price. We must develop assumptions that require
judgment to determine the standalone selling price for each performance obligation identified in the contract. We utilize
key assumptions to determine the standalone selling price, which may include other comparable transactions, pricing
considered in negotiating the transaction and the estimated costs. Estimating costs for research and development programs
is subjective as we estimate the costs anticipated to successfully complete the research performance obligations. As the
research is novel, efforts to be successful may be significantly different than the estimated costs at the beginning of the
contract. Certain variable consideration is allocated specifically to one or more performance obligations in a contract when
the terms of the variable consideration relate to the satisfaction of the performance obligation and the resulting amounts
allocated to each performance obligation are consistent with the amounts we would expect to receive for satisfying each
performance obligation.

Recognition of Revenue

We utilize judgment to determine whether the performance obligation is satisfied over time or at a point in time. We
determine the appropriate method of measuring progress performance obligations satisfied over time for purposes of
recognizing revenue, such as by using an input method based on costs incurred compared to the costs expected to be
incurred in the future to satisfy the performance obligation. We evaluate the measure of progress each reporting period and,
if necessary, adjust the measure of performance and related revenue recognition. The estimated remaining costs is highly
subjective, as the research is novel, therefore efforts to be successful may be significantly different than the estimated costs
made at the balance sheet date. If the license to our intellectual property is determined to be distinct from the other
performance obligations identified in the arrangement, we will recognize revenue from non-refundable, up-front fees
allocated to the license when the license is transferred to the customer and the customer is able to use and benefit from the
license.

We receive payments from customers based on billing schedules established in each contract. Up-front payments and fees
are recorded as deferred revenue upon receipt or when due until we perform our obligations under these arrangements.
Amounts are recorded as accounts receivable when our right to consideration is unconditional.

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As it relates to the Gilead Collaboration Agreement, the Company recognized the revenue related to the research and
development services based on a cost input method over the research term for each respective Gilead Program. We
evaluated the measure of progress each reporting period and, if necessary, adjusted the measure of performance and related
revenue recognition. The estimate of remaining costs was highly subjective, as the research was novel, and efforts to be
successful may have been significantly different than the estimated costs made at each balance sheet date.

Recent Accounting Pronouncements

We have reviewed all recently issued standards and have determined that, other than Recently Issued Accounting
Pronouncements as disclosed in Note 2 to our audited consolidated financial statements appearing elsewhere in this Annual
Report on Form 10-K, such standards will not have a material impact on our financial statements or do not otherwise apply
to our operations.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

We are a smaller reporting company as defined by Rule 12b-2 of the Securities Exchange Act of 1934, as amended (the
“Exchange Act”), and are not required to provide the information required under this item.

Item 8. Financial Statements and Supplementary Data

Our financial statements, together with the report of our independent registered public accounting firm, appear in this
Annual Report beginning on page F-1.

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures.

Management’s Evaluation of our Disclosure Controls and Procedures

We maintain “disclosure controls and procedures,” as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act,
that are designed to ensure that information required to be disclosed in the reports that we file or submit under the
Exchange Act is (1) recorded, processed, summarized and reported within the time periods specified in the Securities and
Exchange Commission’s rules and forms and (2) accumulated and communicated to our management, including our
principal executive officer and principal financial and accounting officer, as appropriate to allow timely decisions regarding
required disclosure. Our 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 applies its
judgment in evaluating the cost-benefit relationship of possible controls and procedures. Our disclosure controls and
procedures are designed to provide reasonable assurance of achieving their control objectives.

Our management, with the participation of our chief executive officer (principal executive officer) and chief financial
officer (principal financial and accounting officer), has evaluated the effectiveness of our disclosure controls and
procedures as of December 31, 2023, the end of the period covered by this Annual Report on Form 10-K. Based upon such
evaluation, our chief executive officer and chief financial officer have concluded that our disclosure controls and
procedures were effective at the reasonable assurance level as of such date. We continue to review and document our
disclosure controls and procedures, including our internal controls and procedures for financial reporting, and may from
time to time make changes aimed at enhancing their effectiveness and to ensure that our systems evolve with our business.

Management’s Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as such
term is defined in Exchange Act Rule 13a–15(f) and 15d-15(d) under the Exchange Act. Our internal control

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system was designed to provide reasonable assurance to our management and our Board regarding the preparation and fair
presentation of published financial statements. All internal control systems, no matter how well designed have inherent
limitations. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to
financial statement preparation and presentation. Our management assessed the effectiveness of our internal control over
financial reporting as of December 31, 2023. In making this assessment, our management used the criteria set forth in
Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway
Commission in 2013 (“COSO criteria”). Based on this assessment, management concluded that our internal control over
financial reporting was effective as of December 31, 2023. This Annual Report on Form 10-K does not include an
attestation report pursuant to the requirements of Section 404(b) of the Sarbanes-Oxley Act of as we qualify as a “smaller
reporting company” and as such, are exempt from such auditor attestation requirement.

Changes in Internal Controls Over Financial Reporting

No change in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange
Act) occurred during the year ended December 31, 2023 that has materially affected, or is reasonably likely to materially
affect, our internal control over financial reporting.

Item 9B. Other Information.

None.

Item 9C. Foreign Jurisdictions that Prevent Inspections

Not applicable.

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Item 10. Directors, Executive Officers, and Corporate Governance

PART III

The information required under this item is incorporated herein by reference to the Company’s definitive proxy statement
pursuant to Regulation 14A, which proxy statement will be filed with the SEC not later than 120 days after the close of the
Company’s fiscal year ended December 31, 2023.

Item 11. Executive Compensation

The information required under this item (excluding the information under the heading “Pay Versus Performance”) is
incorporated herein by reference to the Company’s definitive proxy statement pursuant to Regulation 14A, which proxy
statement will be filed with the SEC not later than 120 days after the close of the Company’s fiscal year
ended December 31, 2023.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required under this item is incorporated herein by reference to the Company’s definitive proxy statement
pursuant to Regulation 14A, which proxy statement will be filed with the SEC not later than 120 days after the close of the
Company’s fiscal year ended December 31, 2023.

Item 13. Certain Relationships and Related Transactions and Director Independence

The information required under this item is incorporated herein by reference to the Company’s definitive proxy statement
pursuant to Regulation 14A, which proxy statement will be filed with the SEC not later than 120 days after the close of the
Company’s fiscal year ended December 31, 2023.

Item 14. Principal Accountant Fees and Services

The information required under this item is incorporated herein by reference to the Company’s definitive proxy statement
pursuant to Regulation 14A, which proxy statement will be filed with the SEC not later than 120 days after the close of the
Company’s fiscal year ended December 31, 2023.

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Item 15. Exhibits, Financial Statements and Schedules

(a)(1) Financial Statements.

PART IV

Our consolidated financial statements and notes thereto, together with the Reports of Independent Registered Public
Accounting Firm are included in Item 8 of this Annual Report on Form 10-K commencing on page F-1.

(a)(2) Financial Statement Schedules.

All financial schedules have been omitted because the required information is either presented in the consolidated financial
statements or the notes thereto or is not applicable or required.

(a)(3) Exhibits.

The following exhibits are included in this Annual Report on Form 10-K for the fiscal year ended December 31, 2023 (and
are numbered in accordance with Item 601 of Regulation S-K):
Number

     Exhibit No.    

     Form     

Description

Filing Date

File No.

3.1

3.2

3.3

4.1

4.2

4.3

4.4
4.5
4.6
10.1+

10.2+

10.3+
10.4+
10.5+

10.6+

10.7+

Amended and Restated Certificate of
Incorporation of the Registrant
Amendment to Amended and Restated
Certificate of Incorporation of the Registrant
Amended and Restated By-laws of the
Registrant
Investors’ Rights Agreement among the
Registrant and certain of its stockholders,
dated December 22, 2017
Specimen Stock Certificate evidencing shares
of common stock
Amended and Restated Warrant to Purchase
Stock, by and between Silicon Valley Bank
and the Registrant, dated December 22, 2017
Description of Capital Stock
Form of Pre-Funded Warrant
Form of Common Stock Warrant
2017 Stock Option and Incentive Plan and
forms of award agreements thereunder
2018 Stock Option and Incentive Plan and
forms of award agreements thereunder
Senior Executive Cash Incentive Bonus Plan
2018 Employee Stock Purchase Plan
Scholar Rock Holding Corporation 2022
Inducement Equity Plan
Amendment No. 1 to Scholar Rock Holding
Corporation 2022 Inducement Equity Plan,
dated September 4, 2022
Amendment No. 2 to Scholar Rock Holding
Corporation 2022 Inducement Equity Plan,
dated February 3, 2023

S-1/A

333-224493

3.2

May 8, 2018

S-1/A

333-224493

3.1.1

May 14, 2018

S-1/A

333-224493

S-1

333-224493

S-1/A

333-224493

S-1

333-224493

10-K
8-K
8-K
S-1

001-38501
001-38501
001-38501
333-224493

S-1/A

333-224493

S-1/A
S-1/A
8.K

333-224493
333-224493
001-38501

S-8

333-268327

3.4

4.1

4.2

4.3

4.4
4.1
4.2
10.1

10.2

10.3
10.4
10.2

99.2

May 8, 2018

April 27, 2018

May 14, 2018

April 27, 2018

March 12, 2020
June 21, 2022
June 21, 2022
April 27, 2018

May 14, 2018

May 8, 2018
May 14, 2018
June 21, 2022

November 14, 2022

10-K

001-38501

10.7

March 7, 2023

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10.8+*

10.9+
10.10†

Amendment No. 3 to Scholar Rock Holding
Corporation 2022 Inducement Equity Plan,
dated January 25, 2024
Form of Indemnification Agreement
Exclusive License Agreement by and
between the Registrant, and Children’s
Medical Center, dated as December 16, 2013

10.17

10.19

10.18

10.14

10.15††
10.16

10.13†† Master Collaboration Agreement, dated
December 19, 2018, by and between the
Registrant and Gilead Sciences, Inc.
Letter Agreement by and between Scholar
Rock, Inc. and Gilead Sciences, Inc. dated
January 6, 2022
Form of License Agreement.
Share Purchase Agreement, dated December
19, 2018, by and between Scholar Rock
Holding Corporation and Gilead Sciences,
Inc.
Registration Rights Agreement, dated
December 19, 2018, by and among the
Registrant, Gilead Sciences, Inc. and Scholar
Rock Holding Corporation stockholder
signatories named therein.
Irrevocable Registration Rights Waiver and
Amendment, dated December 19, 2018, by
and among the Registrant, Gilead Sciences,
Inc. and Scholar Rock Holding Corporation
stockholder signatories named therein.
Amended and Restated Collaboration
Agreement, dated March 12, 2019, by and
between Scholar Rock, Inc. and Adimab,
LLC
Lease Agreement by and between BMR-
Rogers Street LLC and Scholar Rock, Inc.,
dated November 5, 2019.
Schedules have been omitted pursuant to Item
601(b)(2) of Regulation S-K. A copy of any
omitted schedules will be furnished
supplementally to the Securities and
Exchange Commission upon request.
Employment Agreement, dated July 14, 2020,
by and between Scholar Rock, Inc. and
Edward H. Myles.
Loan and Security Agreement, dated October
16, 2020, by and among the Registrant,
Scholar Rock, Inc., Oxford Finance LLC and
Silicon Valley Bank.
First Amendment to Loan and Security
Agreement, dated November 16, 2021, by
and among the Registrant, Scholar Rock, Inc.,
Oxford Finance LLC and Silicon Valley
Bank.

10.21+

10.25

10.23

10.20

S-1/A
S-1

333-224493
333-224493

10.5
10.6

May 14, 2018
April 27, 2018

8-K/A

001-38501

10.1

December 24, 2018

10-Q

333-224493

10.1

May 16, 2022

8-K/A
8-K/A

001-38501
001-38501

10.2
10.3

December 24, 2018
December 24, 2018

8-K/A

001-38501

10.4

December 24, 2018

8-K/A

001-38501

10.5

December 24, 2018

8-K

001-38501

10.1

March 13, 2019

10-Q

001-38501

10.2

November 12, 2019

8-K

001-38501

10.2

July 16, 2020

10-K

001-38501

10.26

March 9, 2021

10-K

001-38501

10.27

March 7, 2022

125

10-K

001-38501

10.26

March 7, 2023

10-Q

001-38501

10.1

August 9, 2023

8-K

001-38501

10.1

September 20, 2022

8-K

001-38501

10.1

November 9, 2022

8-K

001-38501

10.1

June 21, 2022

10-K

001-38501

10.31

March 7, 2023

Table of Contents

10.26

10.30

10.27

10.31+

10.28+

10.29+

10.32+*

Second Amendment to Loan and Security
Agreement, dated November 10, 2022, by
and among the Registrant, Scholar Rock, Inc.,
Oxford Finance LLC and Silicon Valley
Bank.
Third Amendment to Loan and Security
Agreement, dated April 18, 2023, by and
among the Registrant, Scholar Rock, Inc.,
Oxford Finance LLC and Silicon Valley
Bank.
Employment Agreement, by and between
Scholar Rock, Inc. and Jay T. Backstrom,
dated September 19, 2022.
Employment Agreement, by and between
Scholar Rock, Inc. and Jing Marantz, dated
November 7, 2022.
Form of Securities Purchase Agreement by
and among the Registrant and the purchasers
dated June 17, 2022.
Amended and Restated Employment
Agreement, by and between Scholar Rock,
Inc. and Junlin Ho dated March 1, 2023
Employment Agreement, by and between
Scholar Rock, Inc. and Tracey Sacco, dated
February 1, 2023.
Subsidiaries of the Registrant
Consent of Independent Registered Public
Accounting Firm.
Power of Attorney (included on the signature
page to this report).
Certification of Principal Executive Officer
Pursuant to Rules 13a-14(a) and 15d-14(a)
under the Securities Exchange Act of 1934,
as Adopted Pursuant to Section 302 of the
Sarbanes-Oxley Act of 2002.
Certification of Principal Financial Officer
Pursuant to Rules 13a-14(a) and 15d-14(a)
under the Securities Exchange Act of 1934,
as Adopted Pursuant to Section 302 of the
Sarbanes-Oxley Act of 2002.
Certification of Principal Executive Officer
and Principal Financial Officer Pursuant to 18
U.S.C. Section 1350, as Adopted Pursuant to
Section 906 of the Sarbanes-Oxley Act of
2002.
97#*
Compensation Recovery Policy
101.INS
Inline XBRL Instance Document
101.SCH Inline XBRL Taxonomy Extension Schema

21.1*
23.1*

32.1**

31.1*

31.2*

24.1*

101.CAL

101.DEF

Document
Inline XBRL Taxonomy Extension
Calculation Linkbase Document
Inline XBRL Taxonomy Extension Definition
Linkbase Document

126

Table of Contents

101.LAB Inline XBRL Taxonomy Extension Label

101.PRE

104*

Linkbase Document
Inline XBRL Taxonomy Extension
Presentation Linkbase Document
Cover Page Interactive Data File (formatted
as inline XBRL with applicable taxonomy
extension information contained in Exhibits
101.)

*     Filed herewith.

**   Furnished herewith and not deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as

amended, the Exchange Act, and shall not be deemed to be incorporated by reference into any filing under the
Securities Act of 1933, as amended, or the Exchange Act (whether made before or after the date of the Form 10-K),
irrespective of any general incorporation language contained in such filing.

+     Indicates a management contract or compensatory plan.

†     Confidential treatment has been granted for certain portions of this exhibit. These portions have been omitted and filed

separately with the SEC.

††   Portions of this exhibit have been omitted pursuant to a request for confidential treatment that will be separately filed

with the SEC.

Item 16. Form 10-K Summary

Not applicable.

127

Table of Contents

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused
this report to be signed on its behalf by the undersigned thereunto duly authorized.

SIGNATURES

Date: March 19, 2024

Date: March 19, 2024

SCHOLAR ROCK HOLDING CORPORATION

By: /s/ Jay T. Backstrom
Jay T. Backstrom
President and Chief Executive Officer (Principal
Executive Officer)

By: /s/ Edward H. Myles
Edward H. Myles
Chief Operating Officer & Chief Financial
Officer (Principal Financial and Accounting
Officer)

POWER OF ATTORNEY

Each person whose individual signature appears below hereby authorizes and appoints Jay T. Backstrom and Edward H.
Myles, and each of them, with full power of substitution and resubstitution and full power to act without the other, as his
true and lawful attorney-in-fact and agent to act in his name, place and stead and to execute in the name and on behalf of
each person, individually and in each capacity stated below, and to file any and all amendments to this report on Form 10-
K, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and
Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do
and perform each and every act and thing, ratifying and confirming all that said attorneys-in-fact and agents or any of them
or their or his substitute or substitutes may lawfully do or cause to be done by virtue thereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, 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

/s/ Jay T. Backstrom
Jay T. Backstrom

/s/ Edward H. Myles
Edward H. Myles

/s/ David Hallal
David Hallal

/s/ Srinivas Akkaraju
Srinivas Akkaraju

/s/ Richard Brudnick
Richard Brudnick
/s/ Kristina Burow
Kristina Burow

/s/ Jeffrey S. Flier
Jeffrey S. Flier

/s/ Michael Gilman
Michael Gilman

/s/ Amir Nashat
Amir Nashat

/s/ Katie Peng
Katie Peng

Title

President and Chief Executive Officer
(Principal Executive Officer)

Chief Operating Officer & Chief Financial Officer
(Principal Financial and Accounting Officer)

Date

March 19, 2024

March 19, 2024

Chairman of the Board of Directors

March 19, 2024

Director

Director

Director

Director

Director

Director

Director

128

March 19, 2024

March 19, 2024

March 19, 2024

March 19, 2024

March 19, 2024

March 19, 2024

March 19, 2024

    
    
Table of Contents

/s/ Joshua Reed
Joshua Reed

/s/ Akshay Vaishnaw
Akshay Vaishnaw

Director

Director

March 19, 2024

March 19, 2024

129

Table of Contents

SCHOLAR ROCK HOLDING CORPORATION
Index to Financial Statements

Report of Independent Registered Public Accounting Firm (PCAOB ID: 42)
Consolidated Balance Sheets
Consolidated Statements of Operations and Comprehensive Loss
Consolidated Statements of Stockholders’ Equity
Consolidated Statements of Cash Flows
Notes to Consolidated Financial Statements

F-2
F-4
F-5
F-6
F-7
F-8

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Table of Contents

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Stockholders and the Board of Directors of Scholar Rock Holding Corporation

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Scholar Rock Holding Corporation (the Company) as of
December 31, 2023 and 2022, the related consolidated statements of operations and comprehensive loss, stockholders’
equity, and cash flows for each of the two years in the period ended December 31, 2023, and the related notes (collectively
referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly,
in all material respects, the financial position of the Company at December 31, 2023 and 2022, and the results of its
operations and its cash flows for each of the two years in the period ended December 31, 2023, in conformity with U.S.
generally accepted accounting principles.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion
on the Company’s financial statements based on our audits. We are a public accounting firm registered with the Public
Company Accounting Oversight Board (United States) (“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. The Company is not required to have, nor were we engaged to perform, an audit of its
internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control
over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company's internal
control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether
due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test
basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the
accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of
the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements
that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or
disclosures that are material to the financial statements and (2) involved our especially challenging, subjective or complex
judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated
financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a
separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Description of the
Matter

External Prepaid and Accrued Research and Development Expenses

   As shown in Notes 5 and 7 to the financial statements, the Company’s external prepaid research
and development expenses, long-term prepaid research and development expenses, and accrued
research and development expenses totaled $4.1 million, $4.1 million, and $6.8 million,
respectively, at December 31, 2023. As discussed in Note 2 to the consolidated financial
statements, the Company’s accrued and prepaid external research and development expenses are
recognized based on various inputs, including an evaluation of the progress achieved to
complete specific tasks based on communication with internal and external personnel, open
contracts and purchase orders, invoices received, contracted costs, and other information

F-2

Table of Contents

How We Addressed the
Matter in Our Audit

provided to the Company by its service providers based on their actual costs incurred. Payments
for these activities are due based on the terms of individual arrangements, which may differ from
the pattern of costs incurred. Accrued expenses are reflected on the consolidated balance sheet
when costs incurred exceed payments made while prepaid expenses are reflected on the
consolidated balance sheet when payments made exceed the costs incurred.

Auditing the Company’s accrued and prepaid external research and development expenses is
especially challenging due to the significant judgement required to estimate the services provided
but not yet invoiced. Specifically, the amount of research and development expenses incurred is
sensitive to estimates of the progress of the studies, clinical trials or other activities and the
associated cost of such services. Additionally, due to the duration of certain of the Company’s
ongoing research and development activities and the timing of invoicing received from third
parties, the actual amounts incurred may not be known at the time the financial statements are
issued, further adding to the estimation uncertainty.

To test accrued and prepaid external research and development expenses, our audit procedures
included, among others, testing the accuracy and completeness of the underlying data used to
calculate accrued and prepaid external research and development expenses, as well as evaluating
the assumptions and estimates used by management to measure progress of studies, clinical trials
or other activities. To assess the extent of services incurred, we assessed the progress of clinical
trials with the Company’s research and development personnel that oversee the clinical trials and
obtained information from service providers regarding costs incurred to date. We also tested
subsequent invoices received and inspected the Company’s contracts with service providers and
any pending change orders to assess the effect on the accrued or prepaid external research and
development expenses.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 2015.

Boston, Massachusetts
March 19, 2024

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Table of Contents

SCHOLAR ROCK HOLDING CORPORATION
CONSOLIDATED BALANCE SHEETS

(In thousands, except share and per share data)

Assets
Current assets:

Cash and cash equivalents
Marketable securities
Prepaid expenses and other current assets

Total current assets

Property and equipment, net
Operating lease right-of-use asset
Restricted cash
Other long-term assets

Total assets

Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable
Accrued expenses
Operating lease liability
Short-term debt
Other current liabilities
Total current liabilities

Long-term portion of operating lease liability
Long-term debt

Total liabilities

Commitments and contingencies (Note 12)
Stockholders’ equity:

     December 31,       December 31, 

2023

2022

$

$

$

101,855
178,083
8,256
288,194
4,600
11,417
2,407
4,417
311,035

3,465
20,449
7,408
1,334
85
32,741
4,392
48,684
85,817

$

$

$

103,275
212,086
12,663
328,024
7,384
18,543
2,498
1,719
358,168

3,994
24,321
7,852
—
222
36,389
11,800
49,744
97,933

Preferred stock, $0.001 par value; 10,000,000 shares authorized at December 31, 2023
and December 31, 2022; no shares issued and outstanding at December 31, 2023 and
December 31, 2022
Common stock, $0.001 par value; 150,000,000 shares authorized; 75,979,495 and
51,672,579 shares issued and outstanding as of December 31, 2023 and
December 31, 2022, respectively
Additional paid-in capital
Accumulated other comprehensive income (loss)
Accumulated deficit

Total stockholders’ equity
Total liabilities and stockholders’ equity

—

—

76
901,471
92
(676,421)
225,218
311,035

52
771,699
(884)
(510,632)
260,235
358,168

$

$

The accompanying notes are an integral part of these consolidated financial statements.

F-4

    
 
   
  
 
   
  
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
 
 
  
 
  
 
 
 
 
 
 
 
 
 
 
Table of Contents

SCHOLAR ROCK HOLDING CORPORATION
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS

(In thousands, except share and per share data)

Revenue
Operating expenses:

Research and development
General and administrative
Total operating expenses

Loss from operations
Other income (expense), net
Net loss
Net loss per share, basic and diluted
Weighted average common shares outstanding, basic and diluted

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

Unrealized gain (loss) on marketable securities

Total other comprehensive income (loss)

Comprehensive loss

Year Ended December 31, 
2022
2023

    $

—     $

33,193

121,900
49,395
171,295
(171,295)
5,506
(165,789)
$
(1.99)
$
  83,347,086

124,444
43,119
167,563
(134,370)
(132)
(134,502)
(2.26)
59,611,656

$
$

$

(165,789)

$

(134,502)

976
976
(164,813)

$

(849)
(849)
(135,351)

$

The accompanying notes are an integral part of these consolidated financial statements.

F-5

    
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Table of Contents

SCHOLAR ROCK HOLDING CORPORATION
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands, except share data)

Balance at December 31, 2021

Unrealized loss on marketable securities
Sale of common shares, pre-funded warrants and warrants to purchase
common shares, net of issuance costs
Exercise of stock options
Issuance of common shares upon RSU vesting
Equity-based compensation expense
Net loss

Balance at December 31, 2022

Unrealized gain on marketable securities
Sale of common shares, net of issuance costs
Exercise of stock options
Issuance of common shares upon RSU vesting
Exercise of pre-funded and common warrants
Equity-based compensation expense
Other
Net loss

Balance at December 31, 2023

Common Stock

Shares
35,209,099
—

   Amount
35
—

$

Additional
Paid‑in
   Capital
$ 548,204
—

Accumulated
Other

Total

   Income (Loss)   

Comprehensive Accumulated Stockholders’
Deficit
(376,130) $
—

Equity
172,074
(849)

(35) $
(849)

$

$

16,326,530
44,850
92,100
—
—
51,672,579
—
14,889,364
258,372
533,460
8,625,720
—
—
—

75,979,495

$

16
1
—
—
—
52
—
15
—
—
9
—
—
—

76

$

195,299
495
—
27,701
—
$ 771,699
—
97,638
1,535
—
3,454
27,142
3
—

—
—
—
—
—
(884) $
976
—
—
—
—
—
—
—

—
—
—
—
(134,502)
(510,632) $
—
—
—
—
—
—
—
(165,789)

195,315
496
—
27,701
(134,502)
260,235
976
97,653
1,535
—
3,463
27,142
3
(165,789)

$ 901,471

$

92

$

(676,421) $

225,218

The accompanying notes are an integral part of these consolidated financial statements.

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Table of Contents

SCHOLAR ROCK HOLDING CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

Cash flows from operating activities:
Net loss
Adjustments to reconcile net loss to net cash used in operating activities:

Depreciation and amortization
Amortization of debt discount and debt issuance costs
Loss on disposal of property and equipment
Equity-based compensation
Amortization/accretion of investment securities
Non-cash operating lease expense
Change in operating assets and liabilities:

Prepaid expenses and other current assets
Other assets
Accounts payable
Accrued expenses
Operating lease liabilities
Deferred revenue
Other liabilities

Net cash used in operating activities

Cash flows from investing activities:

Purchases of property and equipment
Proceeds from sale of property and equipment
Purchases of marketable securities
Maturities of marketable securities

Net cash provided by (used in) investing activities

Cash flows from financing activities:

Proceeds from sale of common shares, pre-funded warrants and warrants to purchase
common shares, net of issuance costs
Proceeds from pre-funded and common warrant exercises
Proceeds from stock option exercises
Other
Debt modification payment

Net cash provided by financing activities
Net decrease 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 cash flow information:

Cash paid for interest

Year Ended
December 31, 

2023

2022

$ (165,789)

$ (134,502)

2,844
274
11
27,142
(6,220)
7,126

4,530
(2,698)
(529)
(3,927)
(7,852)
—
(138)
(145,226)

(71)
13
(290,801)
332,000
41,141

97,709
3,463
1,399
3
—
102,574
(1,511)
105,773
104,262

6,399

$

$

2,986
720
33
27,701
(2,142)
6,899

(322)
(97)
(251)
6,889
(7,407)
(33,193)
(8)
(132,694)

(1,064)
—
(300,634)
130,000
(171,698)

195,315
—
492
—
(975)
194,832
(109,560)
215,333
105,773

4,372

$

$

The accompanying notes are an integral part of these consolidated financial statements.

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Table of Contents

SCHOLAR ROCK HOLDING CORPORATION
Notes to Consolidated Financial Statements

1. Nature of the Business and Basis of Presentation

Organization

Scholar Rock Holding Corporation (the “Company”) is a late-stage biopharmaceutical company focused on the discovery,
development, and delivery of innovative medicines for the treatment of serious diseases in which signaling by protein
growth factors plays a fundamental role. As a global leader in transforming growth factor beta (“TGFβ”) superfamily
biology, the Company’s novel understanding of the molecular mechanisms of growth factor activation enabled the
development of a proprietary platform for the discovery and development of monoclonal antibodies that locally and
selectively target the precursor, or latent, forms of growth factors.

The Company’s first product candidate, apitegromab, is a highly selective, fully human, monoclonal antibody, with a
unique mechanism of action that results in inhibition of the activation of the growth factor, myostatin, in skeletal muscle.
Apitegromab is being developed as a potential first muscle-targeted therapy for the treatment of spinal muscular atrophy
(“SMA”). The Company is conducting SAPPHIRE, a pivotal Phase 3 clinical trial to evaluate the efficacy and safety of
apitegromab in patients with nonambulatory Type 2 and Type 3 SMA. In 2023, the Company completed enrollment for the
Phase 3 SAPPHIRE trial and announced data from the Phase 2 TOPAZ trial extension period evaluating patient outcomes
at 36 months of treatment with apitegromab.

In October 2023, the Company announced plans to expand into cardiometabolic disorders and advance its anti-myostatin
program with SRK-439, a novel, fully human anti-myostatin monoclonal antibody, for evaluation in cardiometabolic
disorders, including obesity, towards a potential investigational new drug application (“IND”) submission in 2025. To
inform the development of SRK-439, the Company plans to initiate a Phase 2 proof-of-concept trial of apitegromab in
combination with a GLP-1-receptor agonist in 2024.

The Company’s second product candidate, SRK-181, a highly selective inhibitor of the activation of latent transforming
growth factor beta (“TGFβ”), is being developed for the treatment of cancers that are resistant to checkpoint inhibitor
(“CPI”) therapies, such as anti-PD-1 or anti-PD-L1 antibody therapies (referred to together as anti-PD-(L)1 antibody
therapies). SRK-181 was evaluated in the Company’s Phase 1 DRAGON proof-of-concept clinical trial in patients with
locally advanced or metastatic solid tumors that exhibit resistance to anti-PD-(L)1 antibody therapies. The Phase 1
DRAGON trial completed enrollment in December 2023. This two-part clinical trial consists of a dose escalation portion
(Part A) and a dose expansion evaluating SRK-181 in combination with an approved anti-PD- (L)1 antibody therapy (Part
B). Part B includes the following active cohorts: urothelial carcinoma, cutaneous melanoma, non-small cell lung cancer,
clear cell renal cell carcinoma, and head and neck squamous cell carcinoma. Safety, efficacy and biomarker data were
presented in November 2023 at the Society for Immunotherapy of Cancer 38th Annual Meeting.

Additionally, the Company continues to create a pipeline of product candidates to deliver novel therapies to underserved
patients suffering from a wide range of serious diseases, including neuromuscular disorders, cardiometabolic disorders,
cancer, fibrosis, and iron-restricted anemia. The Company was originally formed in May 2012. Its principal offices are in
Cambridge, Massachusetts.

Since its inception, the Company’s operations have focused on research and development of monoclonal antibodies that
selectively inhibit activation of growth factors for therapeutic effect, as well as establishing the Company’s intellectual
property portfolio and performing research and development activities. The Company has primarily financed its operations
through various equity financings, including in October 2023 (Note 9), as well as research and development collaboration
agreements and the Company’s debt facility (Note 13).

Revenue generation activities have been limited to two collaborations, both containing research services and the issuance
of a license. The first agreement, executed in 2013, was with Janssen Biotech, Inc. (“Janssen”), a subsidiary of Johnson &
Johnson and was terminated in July 2022. The second agreement, the Gilead Collaboration Agreement with Gilead

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Table of Contents

Sciences, Inc. (“Gilead”), was in effect between December 2018 and January 2022. No revenues have been recorded from
the sale of any commercial product.

The Company is subject to a number of risks similar to other life science companies, including, but not limited to,
successful discovery and development of its drug candidates, raising additional capital, development by its competitors of
new technological innovations, protection of proprietary technology and regulatory approval and market acceptance of the
Company’s product candidates. The Company anticipates that it will continue to incur significant operating losses for the
next several years as it continues to develop its product candidates. The Company believes that its existing cash, cash
equivalents, and marketable securities at December 31, 2023 will be sufficient to allow the Company to fund its current
operations through at least a period of one year after the date these financial statements are issued.

Basis of Presentation

The consolidated financial statements include the accounts of Scholar Rock Holding Corporation and its wholly owned
subsidiaries. All intercompany balances have been eliminated in consolidation.

These consolidated financial statements have been prepared in conformity with accounting principles generally accepted in
the U.S. (“GAAP”). Any reference in these notes to applicable guidance is meant to refer to the authoritative GAAP as
found in the Accounting Standards Codification (“ASC”) and Accounting Standards Update (“ASU”) of the Financial
Accounting Standards Board (“FASB”).

2. Summary of Significant Accounting Policies

Use of Estimates

The preparation of financial statements in accordance with GAAP requires management to make estimates and judgments
that may affect the reported amounts of assets and liabilities and related disclosures of contingent assets and liabilities at
the date of the financial statements and the related reporting of revenues and expenses during the reporting period.
Management bases its estimates on historical experience and on various assumptions that are believed to be reasonable
under the circumstances. Actual results could differ from those estimates.

Concentration of Credit Risk and Off-Balance Sheet Risk

The Company has no off-balance sheet risk, such as foreign exchange contracts, option contracts or other foreign-hedging
arrangements. The Company follows an investment policy approved by the Board of Directors. Its primary objectives are
the preservation of capital and maintenance of liquidity. The Company invests only in fixed income instruments
denominated and payable in U.S. dollars including obligations of the U.S. government and its agencies and money market
funds registered according to SEC Rule 2a-7 of the Investment Company Act of 1940. All securities must have a readily
ascertainable market value, must be readily marketable and be U.S. dollar denominated.

Cash, Cash Equivalents and Restricted Cash

The Company considers highly liquid investments with a maturity of three months or less when purchased to be cash
equivalents. Cash equivalents are stated at cost, which approximates market value. At December 31, 2023 and 2022, cash
equivalents include money market funds that invest primarily in U.S. government-backed securities and treasuries.

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At December 31, 2023 and 2022, restricted cash consists of letters of credit related to its leased facilities. The following
table reconciles cash, cash equivalents and restricted cash per the balance sheet to the statement of cash flows (in
thousands):

Cash and cash equivalents
Restricted cash

Marketable Securities

As of December 31, 
2022
2023
$ 103,275
$ 101,855
2,498
2,407
$ 105,773
$ 104,262

The Company classifies its marketable securities as available-for-sale. Marketable securities with a remaining maturity date
greater than one year are classified as non-current if the Company does not intend to utilize the marketable securities to
fund current operations. Marketable securities are maintained by an investment manager and consist of U.S. treasury
obligations and government agency securities. Marketable securities are carried at fair value with the unrealized gains and
losses included in accumulated other comprehensive income (loss) as a component of stockholders’ equity until realized.
Any premium or discount arising at purchase is amortized and/or accreted to interest income and/or expense over the life of
the underlying marketable security.

Although available to be sold to meet operating needs or otherwise, securities are generally held through maturity. The cost
of securities sold is determined on a specific identification basis, and realized gains and losses are included in other income
(expense) within the statement of operations and comprehensive loss.

The Company reviews its portfolio of available-for-sale debt securities, using both quantitative and qualitative factors, to
determine if declines in fair value below cost have resulted from a credit loss or other factors. If the decline in fair value is
due to credit loss factors, a loss is recognized in net income. To date, the Company has not experienced any credit losses
and does not believe it is exposed to any significant credit risk on these investments.

Property and Equipment

Property and equipment are recorded at cost. Expenditures for major renewals or betterments that extend the useful lives of
property and equipment are capitalized; expenditures for maintenance and repairs are charged to expense as incurred.
Depreciation is calculated on a straight-line basis over the estimated useful lives of the related asset. Property and
equipment are depreciated as follows:

Laboratory equipment
Computer equipment & software
Furniture & fixtures
Machinery & equipment
Leasehold improvements

Impairment of Long-Lived Assets

Estimated Useful Life
(in Years)
3 – 5
3
5
3 – 5
Shorter of the useful life or remaining lease term

Long-lived assets consist of property and equipment and right-of-use assets. Long-lived assets to be held and used are
tested for recoverability whenever events or changes in business circumstances indicate that the carrying amount of the
assets may not be fully recoverable. Factors that the Company considers in deciding when to perform an impairment
review include significant underperformance of the business in relation to expectations, significant negative industry or
economic trends and significant changes or planned changes in the use of the assets. If an impairment review is performed
to evaluate a long-lived asset group for recoverability, the Company compares forecasts of undiscounted cash flows
expected to result from the use and eventual disposition of the long-lived asset group to its carrying value. An impairment
loss would be recognized when estimated undiscounted future cash flows expected to result from the use of

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an asset group are less than its carrying amount. The impairment loss would be based on the excess of the carrying value of
the impaired asset group over its fair value, determined based on discounted cash flows. The Company did not record any
impairment losses on long-lived assets during the years ended December 31, 2023 or 2022.

Leases

The Company accounts for leases using ASC Topic 842, Leases (“ASC 842”). At the inception of an arrangement, the
Company determines whether the arrangement is or contains a lease based on the unique facts and circumstances present.
Leases with a term greater than one year are recognized on the balance sheet as right-of-use assets, lease liabilities and, if
applicable, long-term lease liabilities. Operating lease liabilities and their corresponding right-of-use assets are recorded
based on the present value of lease payments over the expected remaining lease term. Certain adjustments to the right-of-
use asset may be required for items such as incentives received. The interest rate implicit in lease contracts is typically not
readily determinable. As a result, the Company utilizes its estimated 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.

In accordance with the guidance in ASC 842, components of a lease should be split into three categories: lease components
(e.g. land, building, etc.), non-lease components (e.g. common area maintenance, consumables, etc.), and non-components
(e.g. property taxes, insurance, etc.). Then the fixed and in-substance fixed contract consideration (including any related to
non-components) must be allocated based on the respective relative fair values to the lease components and non-lease
components. For operating leases, lease expense relating to fixed payments is recognized on a straight-line basis over the
term and lease expense relating to variable payments is expensed as incurred.

Fair Value Measurements

ASC Topic 820, Fair Value Measurement ("ASC 820"), establishes a fair value hierarchy for instruments measured at fair
value that distinguishes between assumptions based on market data (observable inputs) and the Company’s own
assumptions (unobservable inputs). Observable inputs are inputs that market participants would use in pricing the asset or
liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that
reflect the Company’s assumptions about the inputs that market participants would use in pricing the asset or liability and
are developed based on the best information available in the circumstances. ASC 820 identifies fair value as the exchange
price, or exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an
orderly transaction between market participants. As a basis for considering market participant assumptions in fair value
measurements, ASC 820 establishes a three-tier fair value hierarchy that distinguishes between the following:

Level 1 —  Quoted market prices in active markets for identical assets or liabilities.
Level 2 —  Inputs other than Level 1 inputs that are either directly or indirectly observable, such as quoted market 

prices, interest rates and yield curves.

Level 3 —  Unobservable inputs developed using estimates of assumptions developed by the Company, which 

reflect those that a market participant would use.

To the extent the valuation is based on models or inputs that are less observable or unobservable in the market, the
determination of fair values requires more judgment. Accordingly, the degree of judgment exercised by the Company in
determining fair value is greatest for instruments categorized as Level 3. A financial instrument’s level within the fair value
hierarchy is based on the lowest level of any input that is significant to the fair value measurement.

Segment Information

Operating segments are defined as components of an entity about 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 in
assessing performance. The Company views its operations and manages its business in one operating segment operating
exclusively in the U.S.

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Revenue Recognition

The Company accounts for revenue using the provisions of ASC Topic 606, Revenue from Contracts with Customers
(“ASC 606”). Under ASC 606, an entity 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 the appropriate amount of revenue to be recognized for arrangements determined to be within the
scope of ASC 606, the Company performs the following five steps: (i) identification of the contract(s) with the customer,
(ii) identification of the promised goods or services in the contract and determination of whether the promised goods or
services are performance obligations, (iii) measurement of the transaction price, (iv) allocation of the transaction price to
the performance obligations, and (v) recognition of revenue when (or as) the Company satisfies each performance
obligation. The Company only applies the five-step model to contracts when it is probable that the entity will collect
consideration it is entitled to 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.

The Company accounts for a contract with a customer that is within the scope of ASC 606 when all of the following
criteria are met: (i) the arrangement has been approved by the parties and the parties are committed to perform their
respective obligations, (ii) each party’s rights regarding the goods or services to be transferred can be identified, (iii) the
payment terms for the goods or services to be transferred can be identified, (iv) the arrangement has commercial substance
and (v) collection of substantially all of the consideration to which the Company will be entitled in exchange for the goods
or services that will be transferred to the customer is probable.

The Company first evaluates license and/or collaboration arrangements to determine whether the arrangement (or part of
the arrangement) represents a collaborative arrangement pursuant to ASC Topic 808, Collaborative Arrangements, based
on the risks and rewards and activities of the parties pursuant to the contractual arrangement. The Company accounts for
collaborative arrangements (or elements within the contract that are deemed part of a collaborative arrangement), which
represent a collaborative relationship and not a customer relationship, outside of the scope of ASC 606. The Company’s
two collaborations represented revenue arrangements.

For the arrangements or arrangement components that are subject to revenue accounting guidance, 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. As part of the accounting for these arrangements, the Company must use significant
judgment to determine: a) the number of performance obligations based on the determination under step (ii) above and
whether those performance obligations are distinct from other performance obligations in the contract; b) the transaction
price under step (iii) above; and c) the standalone selling price for each performance obligation identified in the contract
for the allocation of transaction price in step (iv) above. The Company uses judgment to determine whether milestones or
other variable consideration, except for royalties, should be included in the transaction price as described further below.
The transaction price is 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. In determining the
stand-alone selling price of a license to the Company’s proprietary technology or a material right provided by a customer
option, the Company considers market conditions as well as entity-specific factors, including those factors contemplated in
negotiating the agreements as well as internally developed estimates that include assumptions related to the market
opportunity, estimated development costs, probability of success and the time needed to commercialize a product candidate
pursuant to the license. In validating its estimated stand-alone selling prices, the Company evaluates whether changes in
the key assumptions used to determine its estimated stand-alone selling prices will have a significant effect on the
allocation of arrangement consideration between performance obligations.

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The Company estimates the transaction price based on the amount of consideration the Company expects to be received for
transferring the promised goods or services in the contract. The consideration may include both fixed consideration and
variable consideration. At the inception of each arrangement that includes variable consideration, the Company evaluates
the amount of the potential payments and the likelihood that the payments will be received. The Company utilizes either
the most likely amount method or expected value method to estimate the transaction price based on which method better
predicts the amount of consideration expected to be received. If it is probable that a significant revenue reversal would not
occur, the variable consideration is included in the transaction price.

Performance obligations are promised goods or services in a contract to transfer a distinct good or service to the customer.
Promised goods or services are considered distinct when: (i) the customer can benefit from the good or service on its own
or together with other readily available resources and (ii) the promised good or service is separately identifiable from other
promises in the contract. In assessing whether promised goods or services are distinct, the Company considers factors such
as the stage of development of the underlying intellectual property, the capabilities of the customer to develop the
intellectual property on their own and whether the required expertise is readily available.

The Company allocates the transaction price based on the estimated standalone selling price. The Company must develop
assumptions that require judgment to determine the standalone selling price for each performance obligation identified in
the contract. The Company utilizes key assumptions to determine the standalone selling price, which may include other
comparable transactions, pricing considered in negotiating the transaction and the estimated costs. Estimating costs for
research and development programs is subjective as the Company estimates the costs anticipated to successfully complete
the research performance obligations. As the research is novel, efforts to be successful may be significantly different than
the estimated costs at the beginning of the contract. Certain variable consideration is allocated specifically to one or more
performance obligations in a contract when the terms of the variable consideration relate to the satisfaction of the
performance obligation and the resulting amounts allocated to each performance obligation are consistent with the amounts
the Company would expect to receive for each performance obligation.

For performance obligations which consist of licenses and other promises, the Company utilizes judgment to assess the
nature of the combined performance obligation in order to determine whether the combined performance obligation is
satisfied over time or at a point in time. The Company determines the appropriate method of measuring progress of
combined performance obligations satisfied over time for purposes of recognizing revenue. The Company evaluates the
measure of progress each reporting period and, if necessary, adjusts the measure of performance and related revenue
recognition. The estimated remaining costs is highly subjective, as the research is novel, therefore efforts to be successful
may be significantly different than the estimated costs made at the balance sheet date. If the license to the Company’s
intellectual property is determined to be distinct from the other performance obligations identified in the arrangement, the
Company will recognize revenue from non-refundable, up-front fees allocated to the license when the license is transferred
to the customer and the customer is able to use and benefit from the license. The Company receives payments from
customers based on billing schedules established in each contract. Up-front payments and fees are recorded as deferred
revenue upon receipt or when due until the Company performs its obligations under these arrangements. Amounts expected
to be recognized as revenue within the 12 months following the balance sheet date are classified as the current portion of
deferred revenue in the accompanying consolidated balance sheets. 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. Amounts
are recorded as accounts receivable when the Company’s right to consideration is unconditional. Amounts recognized as
revenue, but not yet received or invoiced, are generally recognized as contract assets.

Exclusive Licenses – If the license granted in the arrangement is determined to be distinct from the other promises or
performance obligations identified in the arrangement, which generally include research and development services, the
Company recognizes revenue from non-refundable, upfront fees allocated to the license when the license is transferred to
the customer and the customer is able to use and benefit from the license. In assessing whether a license is distinct from the
other promises, the Company considers relevant facts and circumstances of each arrangement, including the research and
development capabilities of the collaboration partner and the availability of the associated expertise in the general
marketplace. In addition, the Company considers whether the collaboration partner can benefit from the license for its
intended purpose without the receipt of the remaining promise, whether the value of the license is dependent on the
unsatisfied promise, whether there are other vendors that could provide the remaining promise, and whether it is

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separately identifiable from the remaining promise. For licenses that are combined 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. The Company evaluates the measure of progress each reporting period and,
if necessary, adjusts the measure of performance and related revenue recognition. The measure of progress, and thereby
periods over which revenue should be recognized, are subject to estimates by management and may change over the course
of the arrangement.

Research and Development Services – The promises under the Company’s collaboration and license agreements generally
include research and development services to be performed by the Company on behalf of the collaboration partner. For
performance obligations that include research and development services, the Company generally recognizes revenue
allocated to such performance obligations based on an appropriate measure of progress. The Company utilizes judgment to
determine the appropriate method of measuring progress for purposes of recognizing revenue, which is generally an input
measure, such as costs incurred. The Company evaluates the measure of progress each reporting period as described
under Exclusive Licenses above. Reimbursements from the partner that are the result of a collaborative relationship with
the partner, instead of a customer relationship, such as co-development activities, are generally recorded as a reduction to
research and development expense.

Customer Options – The Company’s arrangements may provide a collaborator with the right to certain optional purchases,
such as the right to license a target either at the inception of the arrangement or within a pre-defined option period. Under
these agreements, fees may be due to the Company (i) at the inception of the arrangement as an upfront fee or payment or
(ii) upon the exercise of an option to acquire a license. If an arrangement is determined to contain customer options that
allow the customer to acquire additional goods or services, the goods and services underlying the customer options are not
considered to be performance obligations at the outset of the arrangement, as they are contingent upon option exercise. The
Company evaluates the customer options for material rights, or options to acquire additional goods or services for free or at
a discount. If the customer options are determined to represent a material right, the material right is recognized as a
separate performance obligation at the inception of the arrangement. The Company allocates the transaction price to
material rights based on the relative stand-alone selling price, which is determined based on the identified discount, and the
probability that the customer will exercise the option. Amounts allocated to a material right are not recognized as revenue
until, at the earliest, the option is exercised or expires.

Milestone Payments – At the inception of each arrangement that includes milestone payments based on certain events, the
Company evaluates whether the milestones are 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 Company evaluates factors such as the scientific, clinical, regulatory, commercial,
and other risks that must be overcome to achieve the particular milestone in making this assessment. There is considerable
judgment involved in determining whether it is probable that a significant revenue reversal would not occur. At the end of
each subsequent reporting period, the Company reevaluates the probability of achievement of all milestones subject to
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 revenues and earnings in the period of adjustment. If a milestone or other
variable consideration relates specifically to the Company’s efforts to satisfy a single performance obligation or to a
specific outcome from satisfying the performance obligation, the Company generally allocates the milestone amount
entirely to that performance obligation once it is probable that a significant revenue reversal would not occur.

Royalties – For arrangements that include sales-based royalties, including milestone payments based on a 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 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 licensing arrangements.

For a complete discussion of accounting for collaboration revenues, see Note 14, Agreements.

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Research and Development Expenses and Related Accruals/Prepaids

Research and development expenses are expensed as incurred and consist of costs incurred in performing research and
development activities, including compensation related expenses for research and development personnel, preclinical and
clinical activities including cost of clinical drug supply, overhead expenses including facilities expenses, materials and
supplies, amounts paid to consultants and outside service providers, and depreciation of equipment. Upfront license
payments related to acquired technologies which have not yet reached technological feasibility and have no alternative
future use are also included in research and development expense.

The Company has entered into various research and development service arrangements under which vendors perform
various services. The Company records accrued expenses for estimated costs incurred under the arrangements in excess of
vendor invoices received while cash payments to vendors, including those that are nonrefundable, in excess of estimated
costs incurred are recorded as prepaid expenses. Prepaid expenses are expensed as the related services are performed or
goods are received. When evaluating the adequacy and accuracy of the accrued and prepaid expenses, the Company
reviews open contracts and purchase orders, the level of service performed, invoices received, contracted costs, and
progress of studies, clinical trials or other activities based on communication with internal and/or external personnel.
Significant judgments and estimates are made in determining the accrued and prepaid expense balances at the end of each
reporting period, and payments for these activities are due based on the terms of individual arrangements, which may differ
from the pattern of costs incurred.

Equity-Based Compensation

The Company accounts for equity awards, including restricted stock units, and common stock options, granted as equity
award compensation in accordance with ASC Topic 718, Compensation — Stock Compensation ("ASC 718"). ASC 718
requires all stock-based payments to employees, which includes grants of employee equity awards, to be recognized as
expense in the statements of operations based on their grant date fair values.

The fair value of each restricted stock unit is based on the fair value of the Company’s common stock less any purchase
price, if applicable. The fair value of each stock option award is estimated using the Black-Scholes option-pricing model,
which uses as inputs the fair value of the Company’s common stock and certain subjective assumptions, including the
expected stock price volatility, the expected term of the award, the risk-free rate, and expected dividends. Expected
volatility is calculated based on a blend of the Company’s reported volatility data for the length of time that market data
was available for the Company’s stock and the historical data for a representative group of publicly traded companies, for
which historical information was available. The historical volatility is generally calculated based on a period of time
commensurate with the expected term assumptions. 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. The Company uses the simplified method,
under which the expected term is presumed to be the midpoint between the vesting date and the end of the contractual term.
The Company utilizes this method due to lack of historical exercise data and the plain nature of its stock-based awards. The
expected dividend yield is assumed to be zero as the Company has never paid dividends and has no current plans to pay
any dividends on common stock.

Compensation expense related to equity awards to employees that are subject to graded vesting is recognized on a straight-
line basis, based on the grant date fair value, over the requisite service period of the award, which is generally the vesting
term. For awards subject to performance conditions, the Company recognizes equity award compensation expense using an
accelerated recognition method over the remaining service period when management determines that achievement of the
milestone is probable. Management evaluates when the achievement of a performance-based milestone is probable based
on the relative satisfaction of the performance conditions as of the reporting date.

The Company classifies equity-based compensation expense in its consolidated statements of operations in the same
manner in which the award recipient’s salary and related costs are classified or in which the award recipient’s service
payments are classified.

The Company accounts for forfeitures when they occur.

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Comprehensive Loss

Comprehensive loss is the change in equity of a business enterprise during a period from transactions and other events and
circumstances from non-owner sources. Comprehensive loss includes net loss and the change in accumulated other
comprehensive income (loss) for the period. Accumulated other comprehensive income (loss) consisted entirely of
unrealized gains and losses on available-for-sale marketable securities during the period ending December 31, 2023 and
2022.

Net Loss per Share

The Company applies the two-class method to compute basic and diluted net loss per share because it has issued shares that
meet the definition of participating securities. The two-class method determines net income (loss) per share for each class
of common and participating securities according to dividends declared or accumulated and participation rights in
undistributed earnings. The two-class method requires income (losses) available to common stockholders for the period to
be allocated between common and participating securities based upon their respective rights to share in the earnings as if
all income (losses) for the period had been distributed. During periods of loss, there is no allocation required under the two-
class method since the participating securities do not have a contractual obligation to fund the losses of the Company.

The Company calculates basic net loss per share by dividing net loss by the weighted average number of common shares
outstanding, including pre-funded warrants and excluding restricted common stock. The Company calculates diluted net
loss per share by dividing net loss by the weighted average number of common shares outstanding, as applicable, after
giving consideration to the dilutive effect of restricted stock units, warrants, pre-funded warrants, and stock options that are
outstanding during the period.

Income Taxes

Income taxes are recorded in accordance with ASC Topic 740, Income Taxes ("ASC 740"), which provides for deferred
taxes using an asset and liability approach. Under this method, deferred income tax assets and liabilities are recognized
based on future income tax consequences attributable to differences between the financial statement carrying amount of
existing assets and liabilities, and their respective income tax basis. Deferred income tax assets and liabilities are measured
using enacted income tax rates expected to apply to taxable income in the years in which those temporary differences are
expected to be recovered or settled.

The Company provides reserves for potential payments of tax to various tax authorities related to uncertain tax positions,
as necessary. The tax benefits recorded are based on a determination of whether and how much of a tax benefit taken by the
Company in its tax filings or positions is "more likely than not" to be realized following resolution of any uncertainty
related to the tax benefit, assuming that the matter in question will be raised by the tax authorities.

The Company is open to examination by the Internal Revenue Service for the tax years ended December 31, 2013 to
December 31, 2023. Since the Company is in a U.S. loss carryforward position, carryforward tax attributes generated in
prior years may still be adjusted upon future examination if they have or will be used in a future period. The Company is
currently not under examination by the Internal Revenue Service or any other jurisdictions for any tax years. The Company
has not recorded any interest or penalties on any unrecognized tax benefits since its inception.

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Recently Adopted Accounting Pronouncements

In June 2016, the FASB issued ASU 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit
Losses on Financial Instruments. The standard requires that a financial asset or a group of financial assets measured at
amortized cost basis to be presented at the net amount expected to be collected. Under previous GAAP, a company only
considered past events and current conditions in measuring an incurred loss. Under ASU 2016-13, the information that a
company must consider is broadened in developing an expected credit loss estimate for assets measured either collectively
or individually. The use of forecasted information incorporates more timely information in the estimate of expected credit
loss. The guidance is applied using a modified retrospective, or prospective approach, depending on a specific amendment.
In November 2019, the FASB deferred the effective date for smaller reporting companies to fiscal years beginning after
December 15, 2022. Therefore, the new standard was effective for the Company on January 1, 2023. The Company
established processes and internal controls to comply with the new credit loss standard and related disclosure requirements.
The Company’s investment policy has primary objectives of preservation of capital and maintenance of liquidity. As a
result, the Company typically invests in money market funds, U.S. treasury obligations and government agency securities.
The Company believes that such funds are subject to minimal credit risk. The Company has not experienced any credit
losses and does not believe it is exposed to any significant credit risk on these investments. The adoption of this standard
did not have a material impact on the Company’s consolidated financial position and results of operations.

Recently Issued Accounting Pronouncements

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment
Disclosures. The standard requires disclosure of incremental segment information on an annual and interim basis and
allows for multiple measures of a segment’s profit or loss provided that one of those measures is consistent with GAAP.
The amendments in this update do not change how a public company identifies its operating segments, aggregates those
operating segments, or applies the quantitative thresholds to determine its reportable segments, but rather requires public
entities to provide in interim periods all disclosures about a reporting segment’s profit or loss and assets that are currently
required annually. ASU 2023-07 becomes effective for the annual period starting on January 1, 2024, and for interim
periods starting on January 1, 2025. The option for early adoption is permitted, however, the Company has decided not to
early adopt, does not anticipate a material impact to its net financial position, and is still evaluating the impact on its
disclosures in future years as a result of the adoption of ASU 2023-07.

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures,
which enhances the transparency of income tax disclosures to provide information to investors to better assess how a
company’s operations and related tax risks, tax planning and operational opportunities affect its tax rate and prospects for
future cash flows. This requires public entities to disclose additional categories in the rate reconciliation regarding federal
and state income taxes, and provide more details surrounding reconciling items if a quantitative threshold is met. The
effective date for public companies is for annual periods starting on January 1, 2025. Early adoption is permitted for annual
financial statements that have not yet been issued or made available for issuance, however, the Company has decided not to
early adopt, does not anticipate a material impact to its net financial position, and is still evaluating the impact on its
disclosures will be in future years as a result of the adoption of ASU 2023-09.

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3. Fair Value of Financial Assets and Liabilities

The following tables summarize the assets and liabilities measured at fair value on a recurring basis at December 31, 2023
and 2022 (in thousands):

Assets:
Money market funds, included in cash and cash equivalents
U.S. treasury obligations, included in cash and cash equivalents
Marketable securities:

U.S. treasury obligations and government agency securities
Total assets

$ 61,764
30,765

$ 61,764
30,765

178,083
$ 270,612

178,083
$ 270,612

$

$

— $
—

—
— $

—
—

—
—

Fair Value Measurements at December 31, 2023
Total

     Level 2      Level 3

     Level 1

Fair Value Measurements at December 31, 2022
Total

     Level 1

     Level 2

     Level 3

Assets:
Money market funds, included in cash and cash equivalents
Marketable securities:

U.S. treasury obligations
Total assets

$ 98,073

$ 98,073

$

— $

  212,086
$ 310,159

  212,086
$ 310,159

$

—  
— $

—

—
—

Cash, cash equivalents and marketable securities are Level 1 assets and include investments in money market funds and
U.S. treasury obligations and government agency securities that are valued using quoted market prices. Accordingly,
money market funds and government funds are categorized as Level 1 as of December 31, 2023 and 2022. There were no
transfers of assets between fair value measurement levels during the years ended December 31, 2023 and 2022.

The carrying amounts reflected in the balance sheets for prepaid expenses and other current assets, accounts payable, and
accrued expenses approximate their fair values at December 31, 2023 and 2022, due to their short-term nature.

The Company believes the terms of its debt reflect current market conditions for an instrument with similar terms and
maturity, therefore the carrying value of the Company's debt approximates its fair value based on Level 3 of the fair value
hierarchy.

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4. Marketable Securities

The following table summarizes the Company’s investments as of December 31, 2023 (in thousands):

Marketable securities available-for-sale:

U.S. treasury obligations and government agency securities

Total available-for-sale securities

$ 177,991
$ 177,991

$
$

93
93

$
$

(1) $ 178,083
(1) $ 178,083

The following table summarizes the Company’s investments as of December 31, 2022 (in thousands):

Amortized
Cost

     Gains

Estimated
     Losses      Fair Value

Gross
Unrealized

Amortized
Cost

     Gains

Estimated
     Losses      Fair Value

Gross
Unrealized

Marketable securities available-for-sale:

U.S. treasury obligations

Total available-for-sale securities

$ 212,970
$ 212,970

$ — $ (884) $ 212,086
$ — $ (884) $ 212,086

The aggregate fair value of marketable securities with unrealized losses was $11.9 million and $212.1 million at
December 31, 2023 and 2022, respectively. At December 31, 2023 and 2022, three investments and 23 investments,
respectively, were in an unrealized loss position. All such investments have been in an unrealized loss position for less than
a year and these losses are considered temporary. The Company has the ability and intent to hold these investments until a
recovery of their amortized cost, which may not occur until maturity.

The Company believes that U.S. treasury obligations and government agency securities are subject to minimal credit risk.
As a result, the Company did not record any charges for credit-related impairments for its available-for-sale securities for
the year ended December 31, 2023.

5. Prepaid Expenses and Other Assets

At December 31, 2023 and 2022, prepaid expenses and other current assets consist of the following (in thousands):

Prepaid external research and development expenses
Prepaid other
Receivables
Prepaid insurance

As of
December 31,     December 31, 

2023

4,059
2,486
1,076
635
8,256

$

$

2022

7,528
1,552
2,735
848
12,663

$

$

At December 31, 2023 and 2022, other long-term assets consist of the following (in thousands):

Prepaid external research and development expenses
Prepaid other
Prepaid insurance

F-19

As of
December 31,     December 31, 

2023

2022

$

$

4,074
312
31
4,417

$

$

1,422
256
41
1,719

    
  
  
  
    
    
    
Table of Contents

6. Property and Equipment, Net

At December 31, 2023 and 2022, property and equipment consists of the following (in thousands):

Laboratory equipment
Leasehold improvements
Computer equipment & software
Furniture & fixtures
Machinery & equipment

Less: Accumulated depreciation and amortization

December 31,     December 31, 

2023
10,270
3,581
1,029
1,002
44
15,926
(11,326)
4,600

$

$

2022
10,298
5,160
1,080
1,002
75
17,615
(10,231)
7,384

$

$

Depreciation and amortization expense was $2.8 million and $3.0 million for the years ended December 31, 2023 and
2022, respectively.

7. Accrued Expenses

At December 31, 2023 and 2022, accrued expenses consist of the following (in thousands):

Accrued payroll and related expenses
Accrued external research and development expense
Accrued professional and consulting expense
Accrued other

As of
December 31,     December 31, 

2023
10,591
6,825
2,267
766
20,449

$

$

2022

6,800
15,178
1,510
833
24,321

$

$

8. Preferred Stock

The Board of Directors or any authorized committee thereof is expressly authorized, to the fullest extent permitted by law,
to provide by resolution or resolutions for, out of the unissued shares of Preferred Stock, the issuance of the shares of
Preferred Stock in one or more series of such stock, and by filing a certificate of designations pursuant to applicable law of
the State of Delaware, to establish or change from time to time the number of shares of each such series, and to fix the
designations, powers, including voting powers, full or limited, or no voting powers, preferences and the relative,
participating, optional or other special rights of the shares of each series and any qualifications, limitations and restrictions
thereof.

9. Common Stock

In October 2023, the Company entered into an underwriting agreement (the “Underwriting Agreement”) with J.P. Morgan
Securities  LLC,  and  Piper  Sandler  &  Co.,  as  representatives  of  the  several  underwriters  named  therein  (the
“Underwriters”), relating to the issuance and sale of an aggregate of 14,270,074 shares of the Company’s common stock,
which  includes  the  exercise  in  full  by  the  underwriters  of  their  option  to  purchase  an  additional  1,861,314  shares  (the
“Option  Shares”),  at  a  public  offering  price  of  $6.85  per  share.  Total  proceeds  of  the  transaction,  including  the  Option
Shares were $92.4 million, net of underwriting discounts and estimated offering expenses. The offering closed on October
16, 2023.

The Company has had a sales agreement in place during various time periods with Jefferies LLC (“Jefferies”) with respect
to an at-the-market (“ATM”) offering program. Under this program, the Company is able to offer and sell, from time to
time at its sole discretion, shares of its common stock through Jefferies as its sales agent. In an ATM offering,

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exchange-listed companies incrementally sell newly issued shares into the secondary trading market through a designated
broker-dealer at prevailing market prices. The current ATM agreement, established in November 2022, allows for the sale
of shares of common stock having an aggregate offering price of up to $100 million. As of December 31, 2023, the
Company has sold 619,290 shares, generating net proceeds of $5.2 million, under the ATM program.

The Company has issued pre-funded warrants, as well as warrants as part of its financing activities. Both the pre-funded
warrants and warrants meet the conditions for equity classification and are recorded as a component of stockholders’ equity
within additional paid-in capital. In June 2022 and November 2020, the Company issued 25,510,205 and 2,179,487 pre-
funded warrants, respectively. During the year ending December 31, 2023, 8,154,695 of the Company’s pre-funded
warrants were exercised. As of December 31, 2023, the Company has 19,534,997 pre-funded warrants outstanding. In June
2022, the Company also issued 10,459,181 warrants with an exercise price of $7.35. During the year ending December 31,
2023, 471,025 of the Company’s warrants were exercised. As of December 31, 2023, the Company has 9,988,156 warrants
outstanding.

Shares Reserved For Future Issuance

As of December 31, 2023, the Company had common shares reserved for issuance as follows:

Common shares reserved for exercise of pre-funded warrants
Common shares reserved for issuance upon exercise or conversion of outstanding warrants
Common shares reserved for exercise of outstanding stock options and unvested restricted stock units
under the 2017 and 2018 Plans
Common shares reserved for exercise of outstanding stock options and unvested restricted stock units
under the 2022 Inducement Plan
Common shares reserved for future issuance under the 2018 Plan
Common shares reserved for future issuance under the 2022 Inducement Plan
Common shares reserved for future issuance under the 2018 ESPP

As of
December 31, 
2023
19,534,997
9,988,156

7,191,377

2,199,128
1,807,499
800,872
1,843,077
43,365,106

10. Equity-Based Compensation

Equity Plans

As of December 31, 2023, the Company has four active equity plans, the 2018 Stock Option and Incentive Plan (the “2018
Plan”), the 2017 Stock Option and Incentive Plan (the “2017 Plan”), the 2018 Employee Stock Purchase Plan (the “2018
ESPP”) and the 2022 Inducement Equity Plan (the “2022 Inducement Plan”).

2018 Stock Option and Incentive Plan

The 2018 Plan was adopted by the Board of Directors on May 2, 2018, and approved by the Company’s stockholders on
May 11, 2018. The 2018 Plan has replaced the 2017 Plan as no additional awards will be granted under that plan following
the consummation of the IPO.

The 2018 Plan provides for the grant of equity-based incentive awards, including incentive stock options, non-qualified
stock options, restricted stock awards, unrestricted stock awards and restricted stock units to the Company’s officers,
employees, directors and other key persons (including consultants). Stock options and restricted stock units granted under
the 2018 Plan to employees generally vest over four years. The shares of common stock underlying any awards that are
forfeited, cancelled, repurchased or are otherwise terminated by the Company under the 2018 Plan will be added back to
the shares of common stock available for issuance under the 2018 Plan.

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The 2018 Plan provides that the number of shares reserved and available for issuance under the plan will automatically
increase each January 1, beginning on January 1, 2019, by 4% of the outstanding number of shares of common stock on the
immediately preceding December 31 or such lesser number of shares as determined by the Board of Directors or
compensation committee (the “Annual Increase”). These limits are subject to adjustment in the event of a stock split, stock
dividend or other change in the Company’s capitalization.

2017 Stock Option and Incentive Plan

The 2017 Plan provides for the grant of incentive stock options, non-qualified stock options, restricted stock awards,
unrestricted stock awards and restricted stock units. Stock options granted under the 2017 Plan to employees generally vest
over four years. The Company no longer issues grants from the 2017 Plan. The shares of common stock underlying any
awards that are forfeited, cancelled, repurchased or are otherwise terminated by the Company under the 2017 Plan will be
added back to the shares of common stock available for issuance under the 2018 Plan.

2018 Employee Stock Purchase Plan

On May 2, 2018, the Board of Directors adopted the 2018 ESPP, and it was approved by the stockholders on May 11, 2018.
At December 31, 2023 there were 1,843,077 shares available to grant under the 2018 ESPP and no shares had been issued.
The ESPP provides that the number of shares reserved and available for issuance will automatically increase each
January 1, beginning on January 1, 2019 through January 1, 2028, by the lesser of (i) 353,614 shares of common stock,
(ii) 1% of the outstanding number of shares of the Company’s common stock on the immediately preceding December 31
or (iii) such lesser number of shares as determined by the 2018 ESPP administrator. The number of shares reserved under
the 2018 ESPP is subject to adjustment in the event of a stock split, stock dividend or other change in the Company’s
capitalization.

2022 Inducement Equity Plan

The 2022 Inducement Plan was approved by the Board of Directors on June 16, 2022 and provides for the grant of non-
qualified stock options, stock appreciation rights, restricted stock awards, restricted stock units, unrestricted stock awards
and dividend equivalent rights to individuals that were not previously an employee or director of the Company or
individuals returning to employment after a bona fide period of non-employment with the Company. Stock options and
restricted stock units granted under the 2022 Inducement Plan to employees generally vest over four years. The shares of
common stock underlying any awards that are forfeited, cancelled, repurchased or are otherwise terminated by the
Company under the 2022 Inducement Plan will be added back to the shares of common stock available for issuance under
the 2022 Inducement Plan. The 2022 Inducement Plan was approved for 1,000,000 shares of common stock in June 2022
and an additional 1,000,000 shares of common stock were added in both September 2022 and February 2023.

Total Equity-Based Compensation Expense

The Company recorded equity-based compensation expense related to all equity-based awards, which was allocated as
follows in the consolidated statements of operations and comprehensive loss for the years ended December 31, 2023 and
2022 (in thousands):

Research and development expense
General and administrative expense

Year Ended
December 31, 

2023

11,203
15,939
27,142

$

$

2022

12,926
14,775
27,701

$

$

Equity-based compensation during the year ended December 31, 2022 includes $2.0 million related to the modification of
certain equity awards.

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The following table summarizes the Company’s unrecognized equity-based compensation expense as of December 31,
2023:

Restricted Stock Units
Stock Options

Restricted Stock Units

As of December 31, 2023

Unrecognized Expense
(in thousands)

$

$

18,482
30,649
49,131

Weighted Average
Remaining Period
of Recognition
(years)

2.6
2.3

The following table summarizes the Company’s restricted stock unit activity for the current year:

Restricted stock units as of December 31, 2022

Granted
Vested
Forfeited

Restricted stock units as of December 31, 2023

Weighted
Average Grant
    Number of Units     Date Fair Value
14.17
9.58
14.18
10.49
11.92

$
1,667,522
$
1,281,245
(533,460) $
(325,755) $
2,089,552
$

The total fair value of restricted stock units vested during the year ended December 31, 2023 was $5.3 million.

Stock Options

The following table summarizes the Company’s stock option activity for the current year:

Outstanding as of December 31, 2022

Granted
Exercised
Cancelled

Outstanding as of December 31, 2023
Options exercisable as of December 31, 2023

Weighted
Average

Weighted
Average
Remaining

Aggregate

     Exercise Price      Contractual Term      Intrinsic Value
(in thousands)
5,835
$

(in years)

7.74

Number of 
Shares

6,242,784
2,285,596
(258,372)
(969,055)
7,300,953
3,416,648

$
$
$
$
$
$

17.12
9.51
5.94
18.10
15.00
18.07

7.90
6.91

$
$

52,299
19,698

Using the Black-Scholes option pricing model, the weighted average fair value of options granted during the year ended
December 31, 2023 was $7.29.

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The following weighted average assumptions were used in determining the fair value of options granted in the years ended
December 31, 2023 and 2022:

Risk-free interest rate
Expected dividend yield
Expected term (years to liquidity)
Expected volatility

11. Income Taxes

Year Ended
December 31, 

2023

2022

3.87 %  
0.0 %  
6.06

89.67 %  

3.07 %
0.0 %
5.99
88.63 %

The Company has not recorded a current tax provision for the years ended December 31, 2023 and 2022.

The effective income tax rate differed from the amount computed by applying the federal statutory rate to the Company’s
loss before income taxes as follows:

Tax effected at statutory rate
State taxes
Stock compensation
Non-deductible expenses
Federal research and development credits
Other
Change in valuation allowance

For Year Ended
December 31, 

2023
21.0 %  
6.3  
(2.3) 
(0.3) 
4.9  
0.1
(29.7) 

— %  

2022
21.0 %
6.8
(2.6)
—
7.5
(0.7)
(32.0)

— %

Deferred tax assets (liabilities) consist of the following at December 31, 2023 and 2022 (in thousands):

Deferred tax assets:

Net operating loss carryforwards
Tax credits
Capitalized Research & Development
Stock based compensation
Operating lease liability
Reserve and accruals
Deferred revenue

Total gross deferred tax assets
Valuation allowance
Total deferred tax assets
Total deferred tax liabilities:

Operating lease right-of-use asset
Fixed and intangible assets

Total deferred tax liabilities
Total net deferred tax assets

F-24

As of
December 31, 

2023

2022

$ 110,120
45,621
49,699
8,328
3,217
3,294
—
  220,279
  (216,524)
3,755

$

93,505
36,785
27,446
7,489
5,329
2,579
—
  173,133
  (167,275)
5,858

(3,113)
(642)
(3,755)

$

— $

(5,029)
(829)
(5,858)
—

    
 
 
    
    
 
 
 
 
 
 
 
    
    
    
  
  
 
 
 
 
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Total Net Deferred Tax Assets

Deferred tax assets are reduced by a valuation allowance if, based on the weight of available positive and negative
evidence, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Accordingly, a
full valuation allowance has been established against the net deferred tax assets as of December 31, 2023 and 2022. The
valuation allowance for deferred tax assets increased by $49.2 million and $43.0 million in 2023 and 2022, respectively.
This increase mainly relates to the establishment of a valuation allowance against the Company’s net domestic deferred tax
assets in connection with net operating losses generated in each year, capitalized research expenses and additional tax
credit carryforwards generated. Starting with tax years beginning after December 31, 2021, entities are required to
capitalize all research and experimentation “R&D” expenses as defined under Section 174 of the Internal Revenue Code
and amortize them over five years for domestic expenses and over fifteen years for foreign expenses. During the year, the
Company capitalized $81.0 million of R&D expenses, net of current and prior year amortization deductions. The
corresponding deferred tax asset as of December 31, 2023 is $49.7 million. As of December 31, 2023, the Company had
approximately $403.2 million and $402.8 million of Federal and State operating loss carryforwards respectively, which
begin to expire in 2032, except for $352.7 million of the Company’s federal net operating loss carryforwards that do not
expire. These loss carryforwards may be available to reduce future taxable income, if any. These loss carryforwards are
subject to review and possible adjustment by the appropriate taxing authorities. As of December 31, 2023, the Company
also had federal and state credit carryovers of $40.8 million and $6.1 million, respectively, which begin to expire in 2034
and 2024, respectively. The amount of loss and credit carryforwards that may be utilized in any future period may be
limited based upon changes in the ownership of the Company’s ultimate parent. Additionally, the deductibility of federal
net operating losses generated after December 31, 2017 is limited to 80% of the Company’s taxable income in any future
taxable year.

The Company follows the provisions of ASC 740-10, “Accounting for Uncertainty in Income Taxes,” which specifies how
tax benefits for uncertain tax positions are to be recognized, measured, and recorded in financial statements; requires
certain disclosures of uncertain tax matters; specifies how reserves for uncertain tax positions should be classified on the
balance sheet; and provides transition and interim period guidance, among other provisions. As of December 31, 2023 and
2022, the Company has not recorded any amounts for uncertain tax positions. The Company’s policy is to recognize
interest and penalties accrued on any uncertain tax positions as a component of income tax expense, if any, in its statements
of income.

The Company’s net operating loss and tax credit carryforwards may become subject to an annual limitation in the event of
certain cumulative changes in the ownership interest of significant shareholders over a three-year period in excess of 50
percent as defined under Section 382 and 383 of the U.S. Internal Revenue Code of 1986, respectively, as well as similar
state provisions. The amount of the annual limitation is determined based on the value of the Company immediately prior
to the ownership change. The Company conducted a Section 382 study covering the period of November 26, 2013 through
December 31, 2023. The study concluded that ownership changes occurred during that period which limit the amount of
the Company’s net operating losses and tax credit carryforwards that can be utilized before expiring. The carryforwards
disclosed represent the amount of attributes that can be utilized based on the results of the study.

All of the Company’s tax years will remain open for examination by the federal and state tax authorities to the extent that
the Company's tax attributes are utilized in future years to offset income or income taxes.

12. Commitments and Contingencies

Operating Leases

620 Memorial Facility Lease

In March 2015, the Company entered into a 5-year lease of office and laboratory space for its corporate headquarters (the
“Lease”) at 620 Memorial Drive in Cambridge, Massachusetts. The Lease was amended in February 2018, to add
additional space (the “Expansion Space”) and to extend the Lease term (the “Amended Lease”). The Amended Lease
expired in September 2023. Annual rent payments, including the Expansion Space, increased from $1.4 million to $1.7

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million over the term of the Amended Lease. Variable lease payments included the Company’s allocated share of costs
incurred and expenditures made by the landlord in the operation and management of the building.

On October 5, 2020, the Company entered into a Sublease Agreement (the “Sublease”) with Orna Therapeutics, Inc. (the
“Subtenant”) to sublease the space covered by the Amended Lease at 620 Memorial Drive, Cambridge, Massachusetts. The
Sublease term commenced on February 1, 2021 and ended on August 31, 2023. The Sublease provided for initial annual
base rent of approximately $1.9 million. The Subtenant was obligated to pay for certain costs, taxes and operating
expenses, subject to certain exclusions. The Sublease was subordinate to that certain Indenture of Lease, dated March 5,
2015, by and between 620 Memorial Leasehold LLC and Scholar Rock, Inc., as amended.

301 Binney Facility Lease

In November 2019, the Company entered into a lease of office and laboratory space at 301 Binney Street in Cambridge,
Massachusetts to be used as its new corporate headquarters. The expiration date of the lease is in August 2025 and the
Company has the option to extend the term by two years. The base rent is $6.9 million per year, subject to an annual
increase of 3.5%, and the Company was subject to a free-rent period through mid-August 2020. Variable lease payments
include the Company’s allocated share of costs incurred and expenditures made by the landlord in the operation and
management of the building. The lease included incentives of $14.1 million in the form of an allowance for tenant
improvements related to the design and build out of the space. In connection with the lease, the Company has secured a
letter of credit for $2.3 million which renews automatically each year. The lease commencement date, for accounting
purposes, was reached in September 2020.

Other information related to the Company’s leases (excluding the Company’s sublease income of $2.0 million and $2.7
million for the years ending December 31, 2023 and 2022, respectively) is as follows (in thousands, except lease term and
discount rate):

Lease Cost:

Operating lease cost
Variable lease cost

Total lease cost

Other information:

Operating cash flows used for operating leases
Weighted average remaining lease term
Weighted average incremental borrowing rate

F-26

For Year Ended
     December 31, 

2023

$

$

8,331
2,105
10,436

For Year Ended
December 31, 
2023

$

9,057
1.6
7.6 %

      
      
Table of Contents

The following is a maturity analysis of the annual undiscounted cash flows reconciled to the carrying value of the operating
lease liabilities as of December 31, 2023 (in thousands):

Year Ending December 31, 
2024
2025

Total lease payments

Less imputed interest

Total operating lease liability
Short-term portion of operating lease liability
Long-term portion of operating lease liability

8,051
4,498
12,549
(749)
11,800
7,408
4,392

$

The Company recorded approximately $8.3 million and $8.7 million in rent expense (excluding sublease income) for
the years ended December 31, 2023 and 2022, respectively.

Legal Proceedings

The Company, from time to time, may be party to litigation arising in the ordinary course of its business. The Company
was not subject to any material legal proceedings during the years ended December 31, 2023 and 2022.

13. Debt

On October 16, 2020 (the “Closing Date”) the Company entered into a Loan and Security Agreement with Oxford Finance
LLC (“Oxford”) and Silicon Valley Bank (“SVB”) for $50.0 million (the “Loan and Security Agreement”). Tranche 1 of
$25.0 million was funded on the Closing Date. The Company had an additional $25.0 million in loan proceeds available
under Tranche 2 which was funded in December 2021, in conjunction with the Company entering into the First
Amendment to Loan and Security Agreement with Oxford and SVB. The Loan and Security Agreement was to mature on
May 1, 2025 and required interest-only payments through November 2022, with principal payments to commence in
December 2022. Pursuant to the Loan and Security Agreement, the Company was required to maintain cash in an SVB
account equal to the lesser of 100% of the Company’s consolidated cash or 105% of the dollar amount of the outstanding
debt.

On November 10, 2022, the Company entered into the Second Amendment to Loan and Security Agreement (the
“Amendment 2”) to increase the Company’s borrowing capacity under the Loan and Security Agreement to an amount up
to $100.0 million, comprised of the original $50.0 million loan which remains outstanding and two additional $25.0 million
tranches. The first $25.0 million tranche available under Amendment 2, was available at the Company’s discretion through
December 2023 upon achievement of certain development and business performance milestones. The Company did not
exercise this tranche. The second $25.0 million tranche available under Amendment 2, may be available upon the
Company’s request, at Oxford and SVB’s discretion. Amendment 2 also extended the interest-only payment period for an
additional 24 months through November 2024, with principal payments to commence in December 2024, or for an
additional 36 months through November 2025 upon achievement of certain development and business performance
milestones, with principal payments to commence in December 2025. The maturity of the loan was extended to November
2027.

Effective upon Amendment 2, the interest rate on the unpaid principal is the greater of the Wall Street Journal prime rate
plus 4.60% or 9.35% per annum. Prepayment is permitted and may include a pre-payment fee ranging from 0% - 3% (of
the principal amount being prepaid), depending on when the prepayment is made. The Company is also required to make a
final payment equal to 2% of the original principal amount.

In conjunction with Amendment 2, the Company was required to pay $0.9 million for the accrued portion of the final
payment on the previous outstanding balance.

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On March 10, 2023, SVB was closed by the California Department of Financial Protection and Innovation, which
appointed the Federal Deposit Insurance Corporation (“FDIC”) as receiver. Afterward, the FDIC transferred all deposits of
the former Silicon Valley Bank to Silicon Valley Bridge Bank, N.A., as operated by the FDIC. On March 27, 2023, Silicon
Valley Bridge Bank was closed by the Office of the Comptroller of the Currency, and the FDIC was appointed as receiver.
First Citizens Bank then entered into an agreement with the FDIC to purchase out of FDIC receivership substantially all
loans and certain other assets and assume all customer deposits and certain other liabilities of Silicon Valley Bridge Bank.
On March 27, 2023, Silicon Valley Bridge Bank and its U.S. branches began operating as Silicon Valley Bank, a division
of First Citizens Bank.

On April 18, 2023, the Company entered into Amendment 3 to the Loan and Security Agreement to amend certain
provisions relating to the Company’s operating accounts.

The following table shows required payments (excluding interest), during the next five years on debt outstanding at
December 31, 2023 (in thousands):

Year Ending December 31, 
2024
2025
2026
2027

Total payments

Total future payments

1,389
16,667
16,667
16,277
51,000

$

$

The Company incurred costs on behalf of the lender recorded as a debt discount of $0.4 million and incurred debt issuance
costs of $0.1 million, both of which are recorded as a deduction from the carrying amount of the debt and are being
amortized as interest expense over the term of the loan. The final payment fee will be treated as an additional debt discount
and accreted to the debt balance over the term.

For the years ended December 31, 2023 and 2022, the Company recorded total interest expense for the debt of $6.5 million
and $4.7 million, respectively.

14. Agreements

Collaboration with Gilead

On December 19, 2018 (the “Effective Date”), the Company entered into a three-year Master Collaboration Agreement
(the “Gilead Collaboration Agreement”) with Gilead to discover and develop specific inhibitors of TGFβ activation
focused on the treatment of fibrotic diseases. Under the collaboration, Gilead had exclusive options to license worldwide
rights to product candidates that emerge from three of the Company’s TGFβ programs (each a “Gilead Program”). Pursuant
to the Gilead Collaboration Agreement, the Company was responsible for antibody discovery and preclinical research
through product candidate nomination, after which, upon exercising the option for a Gilead Program, Gilead would be
responsible for the program’s preclinical and clinical development and commercialization. Such option could have been
exercised by Gilead at any time from the Effective Date through a date that is 90 days following the expiration of the
Research Collaboration Term for a given Gilead Program (no later than March 19, 2022), or until termination of the Gilead
Program, whichever is earlier (the “Option Exercise Period”). On January 6, 2022, Gilead agreed to terminate its option
exercise period for all programs.

Revenue associated with the research and development and license performance obligations relating to the Gilead
Programs was recognized as revenue as the research and development services were provided using an input method,
according to the costs that were incurred on each Gilead Program and the costs that were expected to be incurred to satisfy
the performance obligation. The transfer of control occurred over time. In management’s judgment, this input method was
the best measure of progress towards satisfying the performance obligation. The amounts allocated to the three material
rights provided by the options (“Material Rights”) was to be deferred on the Company’s consolidated balance sheet until
either exercise or termination of the respective options. In January 2022, upon Gilead’s termination of its option exercise
period for all programs, the Company recognized revenue of $33.2 million attributable to the Material

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Table of Contents

Rights in the Company’s consolidated statements of operations and comprehensive loss, after which all revenue related to
the Gilead Collaboration Agreement had been fully recognized.

15. Net Loss per Share

The Company calculates basic net loss per share by dividing net loss by the weighted average number of common shares
outstanding, excluding restricted common stock. The weighted average number of common shares used in the basic and
diluted net loss per share calculation includes the pre-funded warrants issued in connection with the Company’s November
2020 and June 2022 follow-on offerings as the pre-funded warrants are exercisable at any time for nominal cash
consideration. As of December 31, 2023, 8,154,695 pre-funded warrants have been exercised and 19,534,997 pre-funded
warrants are outstanding. The Company has generated a net loss in all periods presented, so the basic and diluted net loss
per share are the same, as the inclusion of the potentially dilutive securities would be anti-dilutive.

Basic and diluted net loss per share is calculated as follows (in thousands, except share and per share data):

Year Ended

Year Ended

Net loss
Weighted average common shares outstanding, basic and
diluted
Net loss per share, basic and diluted

     December 31, 2023      December 31, 2022
(134,502)

(165,789) $

$

83,347,086

$

(1.99) $

59,611,656
(2.26)

The following table sets forth the outstanding common stock equivalents, presented based on amounts outstanding at each
period end, that have been excluded from the calculation of diluted net loss per share for the periods indicated because their
inclusion would have been anti-dilutive:

Restricted stock units
Stock options
Warrants

16. Retirement Plan

Year Ended December 31, 

2023
2,089,552
7,300,953
9,988,156
19,378,661

2022
1,667,522
6,242,784
10,459,181
18,369,487

The Company sponsors a 401(k) retirement plan, in which substantially all employees are eligible to participate upon
employment. Participants may contribute a percentage of their annual compensation to this plan, subject to statutory
limitations. Effective, January 1, 2020, the Company adopted a policy to match 50% of the employee contributions to the
401(k) plan up to a maximum of 6% of the participating employee’s eligible earnings, resulting in a maximum company
match of 3% of the participating employee’s eligible earnings subject to statutory limitations. The Company recognized
$0.9 million and $0.8 million in expense related to the match during the years ended December 31, 2023 and 2022,
respectively.

17. Restructuring

In May 2022, the Company announced a reduction in workforce in connection with the restructuring of its business to
prioritize and focus on its clinical stage assets. The restructuring resulted in a reduction of the Company’s workforce
by 39 positions, or approximately 25%, and occurred during the second quarter of 2022. As a result, the Company recorded
restructuring costs of $1.9 million related to severance benefits for the affected employees, including salary continuation,
coverage of medical insurance premiums and outplacement services, of which $1.4 million was recorded to research and
development expense and $0.5 million was recorded to general and administrative expenses in the second quarter of 2022.
At December 31, 2022, all amounts have been paid. The Company also incurred $0.1 million of non-cash expense, during
the second quarter of 2022, related to equity modifications associated with the extension of the post-termination option
exercise period for the vested portion of the affected employees’ outstanding stock options, as well as modifications of
certain restricted stock units.

F-29

    
    
 
 
    
    
Exhibit 10.8

THIRD AMENDMENT
TO
SCHOLAR ROCK HOLDING CORPORATION
2022 INDUCEMENT EQUITY PLAN

A.

The Scholar Rock Holding Corporation 2022 Inducement Equity Plan (the “Plan”) is

hereby amended by deleting the first sentence of Section 3(a) and substituting therefore the

following:

“The maximum number of shares of Stock reserved and available for issuance
under the Plan shall be 4,000,000 shares, subject to adjustment as provided in
Section 3(c).”

B.

C.

The effective date of this Third Amendment shall be January 25, 2024.

Except as amended herein, the Plan is confirmed in all other respects.

Approved by the Board of Directors on January 25, 2024.

SCHOLAR ROCK, INC.

EMPLOYMENT AGREEMENT

Exhibit 10.32

This Employment Agreement (“Agreement”) is made between Scholar Rock, Inc., a Delaware corporation

(the “Company”), and Tracey Sacco (the “Employee”) and is effective commencing on the Employee’s first day
of employment at the Company (the “Effective Date”), which is expected to be on or before February 1, 2023.

NOW, THEREFORE, in consideration of the mutual covenants and agreements herein contained and other
good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the parties agree as
follows:

1.

Employment.

(a)

Term.  The term of this Agreement shall commence on the Effective Date and continue 
until terminated in accordance with the provisions hereof (the “Term”).  The Employee’s employment with the 
Company will be “at will,” meaning that the Employee’s employment may be terminated by the Company or the 
Employee at any time and for any reason subject to the terms of this Agreement. 

(b)

Position and Duties.  During the Term, the Employee shall serve as the Chief Commercial 

Officer (the “CCO”) of the Company, and shall have such duties and authorities as may from time to time be
prescribed by the Chief Executive Officer of the Company (the “CEO”).  The Employee shall devote the 
Employee’s full working time and efforts to the business and affairs of the Company.  Notwithstanding the 
foregoing, the Employee may serve on other boards of directors, in each instance with the prior written approval 
of the CEO, or engage in religious, charitable or other community activities as long as such services and activities 
do not interfere with the Employee’s performance of the Employee’s duties to the Company as provided in this 
Agreement.

(c)

Work Location.  During the Term, the Employee’s primary work location will be the 

Company’s offices in Massachusetts; provided that the Employee may work from the Employee’s home office in
accordance with the Company’s policies and procedures relating to remote work, as may be in effect from time to
time.

2.

Compensation and Related Matters.

(a)

Base Salary.  During the Term, the Employee’s annual base salary shall be $415,000.  The 
Employee’s base salary shall be reviewed annually by the Compensation Committee of the Board of Directors of 
Scholar Rock Holding Corporation (such Board of Directors, the “Board” and such Compensation Committee, the
“Compensation Committee”) or the Company.  The base salary in effect at any given time is referred to herein as 
“Base Salary.”  The Base Salary shall be payable in a manner that is consistent with the Company’s usual payroll 
practices.

(b)

Incentive Compensation.  During the Term, the Employee shall be eligible to receive cash 

incentive compensation as determined by the Board or the Compensation Committee from time to time.  The 
Employee’s target annual incentive compensation shall be 40% of the Employee’s Base Salary.  The target annual 
incentive compensation in effect at any given time is referred to herein as the “Target Annual Incentive
Compensation”; provided that any incentive compensation for the calendar year in which the Employee’s 
employment commences will be prorated based on the Effective Date.  Except as otherwise provided herein, to 

ACTIVE/120649963.3

earn incentive compensation, the Employee must be employed by the Company on the day such incentive 
compensation is paid.  The incentive compensation, if any, will be paid out no later than March 15th of the year
following the applicable bonus year.

(c)

Signing Bonus.  The Employee shall receive a signing bonus of $25,000 (the “Signing

Bonus”), less applicable payroll taxes, on the first regularly scheduled payroll date following the Effective Date, 
provided that if the Employee leaves the employment of the Company for any reason (excluding any termination 
of employment on account of Employee’s death or disability, Employee’s resignation for Good Reason, or by the 
Company without Cause)  within 12 months of the date on which the Signing Bonus is paid to the Employee, the 
Employee will repay the Company the gross amount of the Signing Bonus within 10 days following the Date of 
Termination (as such terms with initial capitalization are defined below).

(d)

Expenses.  The Employee shall be entitled to receive prompt reimbursement for all 

reasonable expenses incurred by the Employee during the Term in performing services hereunder, in accordance 
with the policies and procedures then in effect and established by the Company.

(e)

Other Benefits.  During the Term, the Employee shall be eligible to participate in or receive 

benefits under the Company’s employee benefit plans in effect from time to time, subject to the terms of such 
plans.

(f)

Vacations.  During the Term, the Employee shall be entitled to paid vacation in accordance 
with the Company’s policies and procedures as may be amended from time to time.  The Employee shall also be 
entitled to all paid holidays given by the Company in accordance with the policies and procedures then in effect 
and established by the Company.

(g)

Equity.  On or after the Effective Date, in connection with the commencement of the 

Employee’s employment and as an inducement grant consistent with the requirements of NASDAQ Stock Market 
Rule 5635(c), subject to the approval of the Board or the Compensation Committee and the Employee’s 
employment with the Company on the date of grant, the Employee shall be granted a stock option to purchase 
225,000 shares of SR Holding Corporation’s (“SR Holding’s”) common stock (the “Stock Option Award”) at an 
exercise price per share equal to the closing price of SR Holding’s common stock on the Nasdaq Global Market 
on the date of grant (or if no closing market price is reported for such date, the closing market price on the 
immediately preceding date for which a closing market price is reported).  The Stock Option Award will vest with 
respect to 25% of the shares of SR Holding’s common stock underlying the Stock Option Award on the first 
anniversary of the Effective Date (the “Vesting Commencement Date”), and the remaining 75% of the shares of
SR Holding’s common stock underlying the Stock Option Award shall vest in 12 equal quarterly installments
following the Vesting Commencement Date, subject to the Employee’s continued Service Relationship (as defined
in SR Holding’s 2022 Inducement Equity Plan (as amended and/or restated from time to time, the “Plan”)) with 
SR Holding through each applicable vesting date.  The Stock Option Award will be subject to all terms and 
conditions and other provisions set forth in the Plan and a Stock Option Award Agreement (such agreement, with 
the Plan, the “Equity Documents”).  The Employee may also be eligible to receive future equity awards, in the 
sole discretion of the Board or the Compensation Committee.

3.

Termination.  During the Term, the Employee’s employment hereunder may be terminated without 

any breach of this Agreement under the following circumstances:

(a)

Death.  The Employee’s employment hereunder shall terminate upon the Employee’s death.

(b)

Termination by Company for Cause.  The Company may terminate the Employee’s 
employment hereunder for Cause.  For purposes of this Agreement, “Cause” shall mean: (i) conduct by the
Employee constituting a material act of misconduct in connection with the performance of the Employee’s

ACTIVE/120649963.3

2

duties, including, without limitation, misappropriation of funds or property of the Company or any of its
subsidiaries or affiliates other than the occasional, customary and de minimis use of Company property for
personal purposes; (ii) the commission by the Employee of any felony or a misdemeanor involving moral
turpitude, deceit, dishonesty or fraud, or any conduct by the Employee that would reasonably be expected to result
in material injury or reputational harm to the Company or any of its subsidiaries or affiliates if the Employee were
retained in the Employee’s position; (iii) continued non-performance by the Employee of the Employee’s duties
hereunder (other than by reason of the Employee’s physical or mental illness, incapacity or disability) which has
continued for more than 30 days following written notice of such non-performance from the Company; (iv) a
material breach by the Employee of any of the Continuing Obligations (as defined below) which has not been
cured (or is incapable of or otherwise cannot be cured) within 30 days after the Company gives the Employee
written notice regarding such breach; (v) a material violation by the Employee of the Company’s written
employment policies which has not been cured (or which is incapable of or otherwise cannot be cured) within 30
days after the Company gives the Employee written notice regarding such violation; or (vi) failure to cooperate
with a bona fide internal investigation or an investigation by regulatory or law enforcement authorities, after being
instructed by the Company to cooperate, or the willful destruction or failure to preserve documents or other
materials known to be relevant to such investigation or the inducement of others to fail to cooperate or to produce
documents or other materials in connection with such investigation.

(c)

Termination Without Cause.  The Company may terminate the Employee’s employment 

hereunder at any time without Cause.  Any termination by the Company of the Employee’s employment under this 
Agreement which does not constitute a termination for Cause under Section 3(b) and does not result from the 
death of the Employee under Section 3(a) shall be deemed a termination without Cause.

(d)

Termination by the Employee.  The Employee may terminate the Employee’s employment 
hereunder at any time for any reason, including but not limited to Good Reason.  For purposes of this Agreement, 
“Good Reason” shall mean that the Employee has complied with the Good Reason Process (hereinafter defined)
following the occurrence of any of the following events without the Employee’s consent: (i) a material diminution
in the Employee’s responsibilities, authority or duties; (ii) a material diminution in the Employee’s Base Salary
except for across-the-board salary reductions based on the Company’s financial performance similarly affecting
all or substantially all senior management employees of the Company; (iii) a change of more than 30 miles in the
geographic location at which the Employee is required to provide services to the Company; (iv) the material
breach by the Company of this Agreement; or (v) any directive to the Employee by the Company to engage in a
willful violation of law. “Good Reason Process” shall mean that (i) the Employee reasonably determines in good
faith that a “Good Reason” condition has occurred; (ii) the Employee notifies the Company in writing of the first
occurrence of the Good Reason condition within 60 days of the first occurrence of such condition; (iii) the
Employee cooperates in good faith with the Company’s efforts, for a period not less than 30 days following such
notice (the “Cure Period”), to remedy the condition; (iv) notwithstanding such efforts, the Good Reason condition 
continues to exist; and (v) the Employee terminates the Employee’s employment within 60 days after the end of 
the Cure Period.  If the Company cures the Good Reason condition during the Cure Period, Good Reason shall be 
deemed not to have occurred.

(e)

Notice of Termination.  Except for termination as specified in Section 3(a), any termination 
of the Employee’s employment by the Company or any such termination by the Employee shall be communicated 
by written Notice of Termination to the other party hereto.  For purposes of this Agreement, a “Notice of
Termination” shall mean a notice which shall indicate the specific termination provision in this Agreement relied 
upon.  

(f)

Date of Termination.  For purposes of this Agreement, “Date of Termination” shall mean:
(i) if the Employee’s employment is terminated by the Employee’s death, the date of the Employee’s death; (ii) if
the Employee’s employment is terminated by the Company for Cause under Section 3(b), the date on which a
Notice of Termination is given; (iii) if the Employee’s employment is terminated by the Company without

ACTIVE/120649963.3

3

Cause under Section 3(c), the date on which a Notice of Termination is given or the date otherwise specified by 
the Company in the Notice of Termination; (iv) if the Employee’s employment is terminated by the Employee 
under Section 3(d) other than for Good Reason, 14 days after the date on which a Notice of Termination is given, 
and (v) if the Employee’s employment is terminated by the Employee under Section 3(d) for Good Reason, the 
date on which a Notice of Termination is given after the end of the Cure Period.  Notwithstanding the foregoing, 
in the event that the Employee gives a Notice of Termination to the Company, the Company may unilaterally 
accelerate the Date of Termination and such acceleration shall not result in a termination by the Company for 
purposes of this Agreement.

4.

Compensation Upon Termination.

(a)

Termination Generally.  If the Employee’s employment with the Company is terminated for 
any reason, the Company shall pay or provide to the Employee (or to the Employee’s authorized representative or 
estate) (i) any Base Salary earned through the Date of Termination, unpaid expense reimbursements (subject to, 
and in accordance with, Section 2(c) of this Agreement) and unused vacation that accrued through the Date of 
Termination on or before the time required by law but in no event more than 30 days after the Employee’s Date of 
Termination;  (ii) any vested benefits the Employee may have under any employee benefit plan of the Company 
through the Date of Termination, which vested benefits shall be paid and/or provided in accordance with the terms 
of such employee benefit plans and (iii) in the case of any termination of employment on account of Employee’s 
death or disability, any accrued but unpaid Incentive Compensation for the prior fiscal year (collectively, the 
“Accrued Benefit”).

(b)

Termination by the Company without Cause or by the Employee for Good Reason.  During 

the Term, if the Employee’s employment is terminated by the Company without Cause as provided in Section 
3(c), or the Employee terminates the Employee’s employment for Good Reason as provided in Section 3(d), then 
the Company shall pay the Employee the Employee’s Accrued Benefit.  In addition, subject to the Employee 
signing a separation agreement in a form and manner satisfactory to the Company, containing, among other 
provisions, a general release of claims in favor of the Company and related persons and entities (with customary 
exclusions for: (i) severance rights under this Agreement, (ii) any rights to indemnification, (iii) rights to Accrued 
Benefits,  (iv) rights to vested equity, and (v) any claims that cannot be released as a matter of law), a 
reaffirmation of all of the Employee’s Continuing Obligations (as defined below), and, in the Company’s sole 
discretion, a one-year post employment noncompetition agreement, and shall provide that if Employee breaches 
any of the Continuing Obligations, all payments of the Severance Amount shall immediately cease (the 
“Separation Agreement and Release”) and the Separation Agreement and Release becoming irrevocable and fully
effective, all within 60 days after the Date of Termination (or such shorter time period provided in the Separation
Agreement and Release), which shall include a 7 business day revocation period:

(i)

the Company shall pay the Employee an amount equal to 9 months of the

Employee’s Base Salary (the “Severance Amount”); provided in the event the Employee is entitled to any
payments pursuant to the Restrictive Covenant Agreement, the Severance Amount received in any
calendar year will be reduced by the amount the Employee is paid in the same such calendar year pursuant
to the Restrictive Covenant Agreement (the “Restrictive Covenant Agreement Setoff”).  Notwithstanding 
the foregoing, if the Employee breaches any of the Continuing Obligations, all payments of the Severance 
Amount shall immediately cease; 

(ii)

if the Employee was participating in the Company’s group health plan immediately

prior to the Date of Termination and elects COBRA health continuation, then the Company shall, for the
period of 9 months following the Date of Termination or the Employee’s COBRA health continuation
period, whichever is shorter, pay the cost of the monthly employer contribution (either by direct payment
to the group health plan provider or the COBRA provider or by reimbursing the Employee for such cost)
that the Company would have made to provide health insurance to the

ACTIVE/120649963.3

4

Employee if the Employee had remained employed by the Company; provided, however, if the Company 
determines that it cannot pay such amounts to the group health plan provider or the COBRA provider (if 
applicable) without potentially violating applicable law (including, without limitation, Section 2716 of the 
Public Health Service Act), then the Company shall convert such payments to payroll payments directly to 
the Employee for the time period specified above.  Such payments shall be subject to tax-related 
deductions and withholdings and paid on the Company’s regular payroll dates; and 

(iii)

the amounts payable under Section 4(b)(i) and (ii), to the extent taxable, shall be

paid out in substantially equal installments in accordance with the Company’s payroll practice
commencing within 60 days after the Date of Termination; provided, however, that if the 60-day period
begins in one calendar year and ends in a second calendar year, the Severance Amount shall begin to be
paid in the second calendar year by the last day of such 60-day period; provided, further, that the initial 
payment shall include a catch-up payment to cover amounts retroactive to the day immediately following 
the Date of Termination.  Each payment pursuant to this Agreement is intended to constitute a separate 
payment for purposes of Treasury Regulation Section 1.409A-2(b)(2).

5.

Compensation Upon Termination after a Change in Control.  The provisions of this Section 5 set 
forth certain terms of an agreement reached between the Employee and the Company regarding the Employee’s 
rights and obligations upon the occurrence of a Change in Control (as defined below) of the Company.  These 
provisions are intended to assure and encourage in advance the Employee’s continued attention and dedication to 
the Employee’s assigned duties and the Employee’s objectivity during the pendency and after the occurrence of 
any such event.  These provisions shall apply in lieu of, and expressly supersede, the provisions of Section 4(b) 
regarding the Severance Amount and other benefits upon a termination of employment, if such termination of 
employment occurs within 18 months after the occurrence of the first event constituting a Change in Control.  
These provisions shall terminate and be of no further force or effect beginning 18 months after the occurrence of a 
Change in Control.

(a)

Change in Control.  During the Term, if within 18 months after a Change in Control, the 

Employee’s employment is terminated by the Company without Cause as provided in Section 3(c) or the 
Employee terminates the Employee’s employment for Good Reason as provided in Section 3(d), then, subject to 
the signing of the Separation Agreement and Release by the Employee and the Separation Agreement and Release 
becoming irrevocable and fully effective, all within 60 days after the Date of Termination (or such shorter time 
period provided in the Separation Agreement and Release), which shall include a 7 business day revocation 
period: 

(i)

the Company shall pay the Employee a lump sum in cash in an amount equal to 1

times the sum of (A) the Employee’s current Base Salary (or the Employee’s Base Salary in effect
immediately prior to the Change in Control or the Employee’s Base Salary in effect immediately before
Good Reason existed under Section 3(d)(ii), if higher than the Employee’s then-current Base Salary) plus
(B) the Employee’s Annual Incentive Compensation (collectively, the “Change in Control Payment”);
provided that the Change in Control Payment shall be reduced by the amount of the Restrictive Covenant 
Agreement Setoff, if applicable.  For purposes of this Agreement, “Annual Incentive Compensation” shall 
mean the Target Annual Incentive Compensation the Employee would have been entitled to receive in the 
fiscal year of the Date of Termination (or the Employee’s Target Annual Incentive Compensation in the 
fiscal year immediately prior to the Change in Control, if higher).  For the avoidance of doubt, in no event 
shall “Annual Incentive Compensation” include any sign-on bonus, retention bonus or any other special 
bonus; 

(ii)

notwithstanding anything to the contrary in the Equity Documents, all time-based

stock options and other time-based stock-based awards held by the Employee that are subject solely to
time-based vesting (the “Time-Based Equity Awards”) shall immediately accelerate and become fully

ACTIVE/120649963.3

5

vested and exercisable or nonforfeitable as of the later of (i) the Date of Termination and (ii) the effective
date of the Separation Agreement and Release (the “Accelerated Vesting Date”); and

(iii)

if the Employee was participating in the Company’s group health plan immediately

prior to the Date of Termination and elects COBRA health continuation, then the Company shall, for the
period of 12 months following the Date of Termination or the Employee’s COBRA health continuation
period, whichever is shorter, pay the cost of the monthly employer contribution (either by direct payment
to the group health plan provider or the COBRA provider or by reimbursing the Employee for such cost)
that the Company would have made to provide health insurance to the Employee if the Employee had
remained employed by the Company; provided, however, if the Company determines that it cannot pay 
such amounts to the group health plan provider or the COBRA provider (if applicable) without potentially 
violating applicable law (including, without limitation, Section 2716 of the Public Health Service Act), 
then the Company shall convert such payments to payroll payments directly to the Employee for the time 
period specified above.  Such payments shall be subject to tax-related deductions and withholdings and 
paid on the Company’s regular payroll dates; and

(iv)

The amounts payable under Section 5(a)(i) and (iii), to the extent taxable, shall be
paid or commence to be paid within 60 days after the Date of Termination; provided, however, that if the
60-day period begins in one calendar year and ends in a second calendar year, such payment shall be paid
or commence to be paid in the second calendar year by the last day of such 60-day period.

(b)

Additional Limitation.

(i)

Anything in this Agreement to the contrary notwithstanding, in the event that the

amount of any compensation, payment or distribution by the Company to or for the benefit of the
Employee, whether paid or payable or distributed or distributable pursuant to the terms of this Agreement
or otherwise, calculated in a manner consistent with Section 280G of the Internal Revenue Code of 1986,
as amended (the “Code”) and the applicable regulations thereunder (the “Aggregate Payments”), would be
subject to the excise tax imposed by Section 4999 of the Code, then the Aggregate Payments shall be
reduced (but not below zero) so that the sum of all of the Aggregate Payments shall be $1.00 less than the
amount at which the Employee becomes subject to the excise tax imposed by Section 4999 of the Code;
provided that such reduction shall only occur if it would result in the Employee receiving a higher After 
Tax Amount (as defined below) than the Employee would receive if the Aggregate Payments were not 
subject to such reduction.  In such event, the Aggregate Payments shall be reduced in the following order, 
in each case, in reverse chronological order beginning with the Aggregate Payments that are to be paid the 
furthest in time from consummation of the transaction that is subject to Section 280G of the Code: (1) cash 
payments not subject to Section 409A of the Code; (2) cash payments subject to Section 409A of the 
Code; (3) equity-based payments and acceleration; and (4) non-cash forms of benefits; provided that in the
case of all the foregoing Aggregate Payments all amounts or payments that are not subject to calculation
under Treas. Reg. §1.280G-1, Q&A-24(b) or (c) shall be reduced before any amounts that are subject to
calculation under Treas. Reg. §1.280G-1, Q&A-24(b) or (c).

(ii)

For purposes of this Section 5(b), the “After Tax Amount” means the amount of the 
Aggregate Payments less all federal, state, and local income, excise and employment taxes imposed on the 
Employee as a result of the Employee’s receipt of the Aggregate Payments.  For purposes of determining 
the After Tax Amount, the Employee shall be deemed to pay federal income taxes at the highest marginal 
rate of federal income taxation applicable to individuals for the calendar year in which the determination is 
to be made, and state and local income taxes at the highest marginal rates of individual taxation in each 
applicable state and locality, net of the maximum reduction in federal income taxes which could be 
obtained from deduction of such state and local taxes. 

ACTIVE/120649963.3

6

(iii)

The determination as to whether a reduction in the Aggregate Payments shall be

made pursuant to Section 5(b)(i) shall be made by a nationally recognized accounting firm selected by the
Company (the “Accounting Firm”), which shall provide detailed supporting calculations both to the 
Company and the Employee within 15 business days of the Date of Termination, if applicable, or at such 
earlier time as is reasonably requested by the Company or the Employee.  Any determination by the 
Accounting Firm shall be binding upon the Company and the Employee.

(c)

Definitions.  For purposes of this Section 5, the following terms shall have the following 

meanings:

“Change in Control” shall mean any of the following:

(i)

any “person,” as such term is used in Sections 13(d) and 14(d) of the Securities
Exchange Act of 1934, as amended (the “Act”) (other than SR Holding, any of its subsidiaries, or any
trustee, fiduciary or other person or entity holding securities under any employee benefit plan or trust of
SR Holding or any of its subsidiaries), together with all “affiliates” and “associates” (as such terms are
defined in Rule 12b-2 under the Act) of such person, shall become the “beneficial owner” (as such term is
defined in Rule 13d-3 under the Act), directly or indirectly, of securities of SR Holding representing 50%
or more of the combined voting power of SR Holding’s then outstanding securities having the right to vote
in an election of the Board (“Voting Securities”) (in such case other than as a result of an acquisition of
securities directly from SR Holding); or

(ii)

the date a majority of the members of the Board is replaced during any 12-month
period by directors whose appointment or election is not endorsed by a majority of the members of the
Board before the date of the appointment or election; or

(iii)

the consummation of (A) any consolidation or merger of SR Holding where the
stockholders of SR Holding, immediately prior to the consolidation or merger, would not, immediately
after the consolidation or merger, beneficially own (as such term is defined in Rule 13d-3 under the Act),
directly or indirectly, shares representing in the aggregate more than 50% of the voting shares of SR
Holding issuing cash or securities in the consolidation or merger (or of its ultimate parent corporation, if
any), or (B) any sale or other transfer (in one transaction or a series of transactions contemplated or
arranged by any party as a single plan) of all or substantially all of the assets of SR Holding and its
affiliates on a consolidated basis.

Notwithstanding the foregoing, a Change in Control shall not be deemed to have occurred for purposes of

the foregoing clause (i) solely as the result of an acquisition of securities by SR Holding which, by reducing the
number of shares of Voting Securities outstanding, increases the proportionate number of Voting Securities
beneficially owned by any person to 50% or more of the combined voting power of all of the then outstanding
Voting Securities; provided, however, that if any person referred to in this sentence shall thereafter become the
beneficial owner of any additional shares of Voting Securities (other than pursuant to a stock split, stock dividend,
or similar transaction or as a result of an acquisition of securities directly from SR Holding) and immediately
thereafter beneficially owns 50% or more of the combined voting power of all of the then outstanding Voting
Securities, then a Change in Control shall be deemed to have occurred for purposes of the foregoing clause (i).

6.

Section 409A.

(a)

Anything in this Agreement to the contrary notwithstanding, if at the time of the

Employee’s separation from service within the meaning of Section 409A of the Code, the Company determines
that the Employee is a “specified employee” within the meaning of Section 409A(a)(2)(B)(i) of the Code, then to
the extent any payment or benefit that the Employee becomes entitled to under this Agreement on account of

ACTIVE/120649963.3

7

the Employee’s separation from service would be considered deferred compensation otherwise subject to the 20% 
additional tax imposed pursuant to Section 409A(a) of the Code as a result of the application of Section 409A(a)
(2)(B)(i) of the Code, such payment shall not be payable and such benefit shall not be provided until the date that 
is the earlier of (A) 6 months and 1 day after the Employee’s separation from service, or (B) the Employee’s 
death.  If any such delayed cash payment is otherwise payable on an installment basis, the first payment shall 
include a catch-up payment covering amounts that would otherwise have been paid during the six-month period 
but for the application of this provision, and the balance of the installments shall be payable in accordance with 
their original schedule.  

(b)

All in-kind benefits provided and expenses eligible for reimbursement under this 

Agreement shall be provided by the Company or incurred by the Employee during the time periods set forth in 
this Agreement.  All reimbursements shall be paid as soon as administratively practicable, but in no event shall 
any reimbursement be paid after the last day of the taxable year following the taxable year in which the expense 
was incurred.  The amount of in-kind benefits provided or reimbursable expenses incurred in one taxable year 
shall not affect the in-kind benefits to be provided or the expenses eligible for reimbursement in any other taxable 
year (except for any lifetime or other aggregate limitation applicable to medical expenses).  Such right to 
reimbursement or in-kind benefits is not subject to liquidation or exchange for another benefit.

(c)

To the extent that any payment or benefit described in this Agreement constitutes “non-

qualified deferred compensation” under Section 409A of the Code, and to the extent that such payment or benefit 
is payable upon the Employee’s termination of employment, then such payments or benefits shall be payable only 
upon the Employee’s “separation from service.”  The determination of whether and when a separation from 
service has occurred shall be made in accordance with the presumptions set forth in Treasury Regulation Section 
1.409A-1(h).

(d)

The parties intend that this Agreement will be administered in accordance with Section 
409A of the Code.  To the extent that any provision of this Agreement is ambiguous as to its compliance with 
Section 409A of the Code, the provision shall be read in such a manner so that all payments hereunder comply 
with Section 409A of the Code.  Each payment pursuant to this Agreement is intended to constitute a separate 
payment for purposes of Treasury Regulation Section 1.409A-2(b)(2).  The parties agree that this Agreement may 
be amended, as reasonably requested by either party, and as may be necessary to fully comply with Section 409A 
of the Code and all related rules and regulations in order to preserve the payments and benefits provided 
hereunder without additional cost to either party.

(e)

The Company makes no representation or warranty and shall have no liability to the

Employee or any other person if any provisions of this Agreement are determined to constitute deferred
compensation subject to Section 409A of the Code but do not satisfy an exemption from, or the conditions of,
such Section.

7.

Continuing Obligations.

(a)

Restrictive Covenant Agreement.  As a material condition of this Agreement, the Employee 

will execute the Employee Non-Competition, Non-Solicitation, Confidentiality and Assignment Agreement (the 
“Restrictive Covenant Agreement”), attached hereto as Exhibit A, prior to the Effective Date.  The Employee 
acknowledges and agrees that the Employee received the Restrictive Covenant Agreement with this Agreement 
and at least 10 business days before the commencement of the Employee’s employment.  For purposes of this 
Agreement, the obligations in this Section 7 and those that arise in the Restrictive Covenant Agreement and any 
other written agreement related to confidentiality, assignment of inventions, or other restrictive covenants signed 
by Employee with the Company after the date of the Restrictive Covenant Agreement shall collectively be 
referred to as the “Continuing Obligations”.

ACTIVE/120649963.3

8

(b)

Third-Party Agreements and Rights.  The Employee hereby confirms that the Employee is 

not bound by the terms of any agreement with any previous employer or other party which restricts in any way the 
Employee’s use or disclosure of information, other than confidentiality restrictions (if any), or the Employee’s 
engagement in any business.  The Employee represents to the Company that the Employee’s execution of this 
Agreement, the Employee’s employment with the Company and the performance of the Employee’s proposed 
duties for the Company will not violate any obligations the Employee may have to any such previous employer or 
other party.  In the Employee’s work for the Company, the Employee will not disclose or make use of any 
information in violation of any agreements with or rights of any such previous employer or other party, and the 
Employee will not bring to the premises of the Company any copies or other tangible embodiments of non-public 
information belonging to or obtained from any such previous employment or other party.

(c)

Litigation and Regulatory Cooperation.  During and after the Employee’s employment, the 
Employee shall cooperate fully with any reasonable request of the Company in the defense or prosecution of any 
claims or actions now in existence or which may be brought in the future against or on behalf of the Company 
which relate to events or occurrences that transpired while the Employee was employed by the Company.  The 
Employee’s full cooperation in connection with such claims or actions shall include, but not be limited to, being 
available to meet with counsel to prepare for discovery or trial and to act as a witness on behalf of the Company at 
mutually convenient times.  During and after the Employee’s employment, the Employee also shall cooperate 
fully with the Company in connection with any investigation or review of any federal, state or local regulatory 
authority as any such investigation or review relates to events or occurrences that transpired while the Employee 
was employed by the Company.  The Company shall reimburse the Employee for any reasonable out-of-pocket 
expenses incurred in connection with the Employee’s performance of obligations pursuant to this Section 7(c).

(d)

Relief.  The Employee agrees that it would be difficult to measure any damages caused to 

the Company which might result from any breach by the Employee of the Continuing Obligations, and that in any 
event money damages would be an inadequate remedy for any such breach.  Accordingly, subject to Section 8 of 
this Agreement, the Employee agrees that if the Employee breaches, or proposes to breach, any portion of this 
Agreement, the Company shall be entitled, in addition to all other remedies that it may have, to an injunction or 
other appropriate equitable relief to restrain any such breach without showing or proving any actual damage to the 
Company.  In addition, in the event the Employee breaches, or proposes to breach, any portion of the Continuing 
Obligations during a period when the Employee is receiving severance payments pursuant to Section 4 or Section 
5 hereof, the Company shall have the right to suspend or terminate such severance payments.  Such suspension or 
termination shall not limit the Company’s other options with respect to relief for such breach and shall not relieve 
the Employee of the Employee’s duties under this Agreement.

(e)

Protected Disclosures and Other Protected Action.  Nothing contained in this Agreement 

limits the Employee’s ability to communicate with any federal, state or local governmental agency or commission, 
including to provide documents or other information, without notice to the Company.

8.

Arbitration of Disputes.  Any controversy or claim arising out of or relating to this Agreement or 
the breach thereof or otherwise arising out of the Employee’s employment or the termination of that employment 
(including, without limitation, any claims of unlawful employment discrimination or retaliation, whether based on 
race, religion, national origin, sex, gender, age, disability, sexual orientation, or any other protected class under 
applicable law, including without limitation Massachusetts General Laws Chapter 151B)  shall, to the fullest 
extent permitted by law, be settled by arbitration in any forum and form agreed upon by the parties or, in the 
absence of such an agreement, under the auspices of the American Arbitration Association (“AAA”) in Boston, 
Massachusetts in accordance with the Employment Dispute Resolution Rules of the AAA, including, but not 
limited to, the rules and procedures applicable to the selection of arbitrators.  In the event that any person or entity 
other than the Employee or the Company may be a party with regard to any such 

ACTIVE/120649963.3

9

controversy or claim, such controversy or claim shall be submitted to arbitration subject to such other person or 
entity’s agreement.  Judgment upon the award rendered by the arbitrator may be entered in any court having 
jurisdiction thereof.  This Section 8 shall be specifically enforceable.  Notwithstanding the foregoing, this Section 
8 shall not preclude either party from pursuing a court action for the sole purpose of obtaining a temporary 
restraining order or a preliminary injunction in circumstances in which such relief is appropriate; provided that 
any other relief shall be pursued through an arbitration proceeding pursuant to this Section 8.

9.

Consent to Jurisdiction.  To the extent that any court action is permitted consistent with or to 

enforce Section 8 of this Agreement, the parties hereby consent to the jurisdiction of the Superior Court of the 
Commonwealth of Massachusetts and the United States District Court for the District of Massachusetts.  
Accordingly, with respect to any such court action, the Employee (a) submits to the personal jurisdiction of such 
courts; (b) consents to service of process; and (c) waives any other requirement (whether imposed by statute, rule 
of court, or otherwise) with respect to personal jurisdiction or service of process.

10.

Integration.  This Agreement, together with the Continuing Obligations, and the Equity 

Documents, constitutes the entire agreement between the parties with respect to the subject matter hereof and 
supersedes all prior agreements between the parties concerning such subject matter.

11. Withholding.  All payments made by the Company to the Employee under this Agreement shall be 

net of any tax or other amounts required to be withheld by the Company under applicable law.

12.

Successor to the Employee.  This Agreement shall inure to the benefit of and be enforceable by the 

Employee’s personal representatives, executors, administrators, heirs, distributees, devisees and legatees.  In the 
event of the Employee’s death after the Employee’s termination of employment but prior to the completion by the 
Company of all payments due to the Employee under this Agreement, the Company shall continue such payments 
to the Employee’s beneficiary designated in writing to the Company prior to the Employee’s death (or to the 
Employee’s estate, if the Employee fails to make such designation).

13.

Enforceability.  If any portion or provision of this Agreement (including, without limitation, any 

portion or provision of any section of this Agreement) shall to any extent be declared illegal or unenforceable by a 
court of competent jurisdiction, then the remainder of this Agreement, or the application of such portion or 
provision in circumstances other than those as to which it is so declared illegal or unenforceable, shall not be 
affected thereby, and each portion and provision of this Agreement shall be valid and enforceable to the fullest 
extent permitted by law.

14.

Survival.  The provisions of this Agreement shall survive the termination of this Agreement and/or 

the termination of the Employee’s employment to the extent necessary to effectuate the terms contained herein.

15. Waiver.  No waiver of any provision hereof shall be effective unless made in writing and signed by 

the waiving party.  The failure of any party to require the performance of any term or obligation of this 
Agreement, or the waiver by any party of any breach of this Agreement, shall not prevent any subsequent 
enforcement of such term or obligation or be deemed a waiver of any subsequent breach.

16.

Notices.  Any notices, requests, demands and other communications provided for by this 

Agreement shall be sufficient if in writing and delivered in person or sent by a nationally recognized overnight 
courier service or by registered or certified mail, postage prepaid, return receipt requested, to the Employee at the 
last address the Employee has filed in writing with the Company or, in the case of the Company, at its main 
offices, attention of the Board.

17.

Amendment.  This Agreement may be amended or modified only by a written instrument signed by 

the Employee and by a duly authorized representative of the Company.

ACTIVE/120649963.3

10

18.

Governing Law.  This is a Massachusetts contract and shall be construed under and be governed in 

all respects by the laws of the Commonwealth of Massachusetts without giving effect to the conflict of laws 
principles thereof.

19.

Counterparts.  This Agreement may be executed in any number of counterparts, each of which 

when so executed and delivered shall be taken to be an original; but such counterparts shall together constitute one 
and the same document.

20.

Successor to Company.  The Company shall require any successor (whether direct or indirect, by 
purchase, merger, consolidation or otherwise) to all or substantially all of the business or assets of the Company 
expressly to assume and agree to perform this Agreement to the same extent that the Company would be required 
to perform it if no succession had taken place.  Failure of the Company to obtain an assumption of this Agreement 
at or prior to the effectiveness of any succession shall be a material breach of this Agreement.

21.

Gender Neutral.  Wherever used herein, a pronoun in the masculine gender shall be considered as 

including the feminine gender unless the context clearly indicates otherwise.

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK. SIGNATURE PAGES FOLLOW.]

ACTIVE/120649963.3

11

IN WITNESS WHEREOF, the parties have executed this Agreement effective on the date and year first

above written.

SCHOLAR ROCK, INC.

By:
Its:

/s/ Caryn Parlavecchio
Chief Human Resources Officer

EMPLOYEE

/s/ Tracey Sacco
Tracey Sacco

ACTIVE/120649963.3

Exhibit A

SCHOLAR ROCK, INC.

Employee Non-Competition, Non-Solicitation, Confidentiality and Assignment Agreement

In consideration and as a condition of my employment by or other service relationship with Scholar Rock, Inc. (including its 

subsidiaries and other affiliates and its and their successors and assigns, the “Company”), I agree to the terms and conditions of this 
Employee Non-Competition, Non-Solicitation, Confidentiality and Assignment Agreement (the “Agreement”).  For purposes of this 
Agreement, references to the employment relationship shall mean any employment, co-employment, independent contractor or other 
service relationship, whether directly or through a third party, that I may have with the Company.  

I  agree 

Information. 

in  writing,  concerning 

1.
that  all
Proprietary 
information,  whether  or  not 
the
Company’s  business,  technology,  business  relationships  or
financial  affairs  which  the  Company  has  not  released  to  the
general  public  (collectively,  “Proprietary  Information”)  is  and
will  be  the  exclusive  property  of  the  Company.    By  way  of
illustration, Proprietary Information may include information or
material  which  has  not  been  made  generally  available  to  the
public,  such  as:    (a)  corporate  information,  including  plans,
strategies,  methods,  policies,  resolutions,  negotiations  or
litigation;  (b)  marketing  information,  including  strategies,
methods,  customer 
information  about
identities  or  other 
customers,  prospect  identities  or  other  information  about
prospects,  or  market  analyses  or  projections;  (c)  financial
including  cost  and  performance  data,  debt
information, 
arrangements,  equity  structure, 
investors  and  holdings,
purchasing  and  sales  data  and  price  lists;  and  (d)  operational
and  technological  information,  including  plans,  specifications,
manuals, forms, templates, pre-clinical and clinical testing data
and  strategies,  software,  designs,  methods,  procedures,
formulas,  discoveries,  inventions,  improvements,  concepts  and
ideas; and (e) personnel information, including personnel lists,
reporting  or  organizational  structure,  resumes,  personnel  data,
compensation 
and
termination 
  Proprietary
arrangements  or  documents. 
Information  also  includes  information  received  in  confidence
by the Company from its customers or suppliers or other third
parties.

performance 

evaluations 

structure, 

2.
Recognition of Company’s Rights.  I will not, at any
time,  without  the  Company’s  prior  written  permission,  either
during  or  after  my  employment,  disclose  any  Proprietary
Information to anyone outside of the Company, or use or permit
to  be  used  any  Proprietary  Information  for  any  purpose  other
than  the  performance  of  my  duties  as  an  employee  of  the
Company,  provided,  however,  that  this  sentence  shall  not
prohibit disclosure required by law or to any of my attorneys on
a confidential basis.  I will cooperate with the Company and use
my  best  efforts  to  prevent  the  unauthorized  disclosure  of  all
Proprietary  Information.    I  will  deliver  to  the  Company  all
copies  of  Proprietary  Information  in  my  possession  or  control
upon the earlier of a request by the Company or termination of
my employment.

3.
Rights  of  Others.    I  understand  that  the  Company  is
now  and  may  hereafter  be  subject  to  non-disclosure  or
confidentiality agreements with third parties which require the
Company  to  protect  or  refrain  from  unauthorized  use  of
proprietary information.  I agree to be bound by the terms of

ACTIVE/120725950.2

such agreements in the event I have access to such proprietary
information.

4.
Commitment to Company; Avoidance of Conflict of
Interest.  While an employee of the Company, I will devote my
full-time  efforts  to  the  Company’s  business  and  I  will  not
engage  in  any  other  business  activity  that  conflicts  with  my
duties  to  the  Company.    I  will  advise  the  president  of  the
Company or his or her nominee at such time as any activity of
either  the  Company  or  another  business  presents  me  with  a
conflict of interest or the appearance of a conflict of interest as
an  employee  of  the  Company.    I  will  take  whatever  action  is
requested  of  me  by  the  Company  to  resolve  any  conflict  or
appearance of conflict which it finds to exist.

5.
Developments.  I will make full and prompt disclosure
to  the  Company  of  all  inventions,  discoveries,  designs,
improvements,
developments,  methods,  modifications, 
processes, algorithms, databases, computer programs, formulae,
techniques,  trade  secrets,  graphics  or  images,  and  audio  or
visual  works  and  other  works  of  authorship  (collectively
“Developments”),  whether  or  not  patentable  or  copyrightable,
that are created, made, conceived or reduced to practice by me
(alone or jointly with others) or under my direction during the
period  of  my  employment.    I  acknowledge  that  all  work
performed by me for the Company is on a “work for hire” basis,
and I hereby do assign and transfer and, to the extent any such
assignment cannot be made at present, will assign and transfer,
to the Company and its successors and assigns all my right, title
and interest in all Developments that (a) relate to the business
of  the  Company  or  any  of  the  products  or  services  being
researched,  developed,  manufactured  or  sold  by  the  Company
or  which  may  be  used  with  such  products  or  services;  or  (b)
result from tasks assigned to me by the Company; or (c) result
from the use of premises, resources, proprietary information or
know-how,  or  personal  property 
tangible  or
intangible)  owned,  leased  or  contracted  for  by  the  Company
(“Company-Related  Developments”),  and  all  related  patents,
patent  applications,  trademarks  and  trademark  applications,
copyrights  and  copyright  applications,  and  other  intellectual
property  rights  in  all  countries  and  territories  worldwide  and
under  any  international  conventions  (“Intellectual  Property
Rights”).  

(whether 

To preclude any possible uncertainty, I have set forth on Exhibit
A attached hereto a complete list of Developments that I have,
alone or jointly with others, conceived, developed or reduced to
practice  prior  to  the  commencement  of  my  employment  with
the Company that I consider to be my property or the property
of third parties and that I wish to have excluded from the scope

 
of  this  Agreement  (“Prior  Inventions”).    If  disclosure  of  any
such  Prior  Invention  would  cause  me  to  violate  any  prior
confidentiality agreement, I understand that I am not to list such
Prior Inventions in Exhibit A but am only to disclose a cursory
name  for  each  such  invention,  a  listing  of  the  party(ies)  to
whom  it  belongs  and  the  fact  that  full  disclosure  as  to  such
inventions has not been made for that reason.  I have also listed
on Exhibit A all patents and patent applications in which I am
named  as  an  inventor,  other  than  those  which  have  been
assigned  to  the  Company  (“Other  Patent  Rights”).    If  no  such
disclosure  is  attached,  I  represent  that  there  are  no  Prior
Inventions  or  Other  Patent  Rights.    If,  in  the  course  of  my
employment with the Company, I incorporate a Prior Invention
into  a  Company  product,  process  or  machine  or  other  work
done  for  the  Company,  I  hereby  grant  to  the  Company  a
nonexclusive,  royalty-free,  paid-up,  irrevocable,  worldwide
license (with the full right to sublicense) to make, have made,
modify, use, sell, offer for sale and import such Prior Invention.
 Notwithstanding the foregoing, I will not incorporate, or permit
to  be  incorporated,  Prior  Inventions  in  any  Company-Related
Development without the Company’s prior written consent.

This Agreement does not obligate me to assign to the Company
any Development which, in the sole judgment of the Company,
reasonably exercised, is developed entirely on my own time and
does  not  relate  to  the  business  efforts  or  research  and
development  efforts  in  which,  during  the  period  of  my
employment,  the  Company  actually  is  engaged  or  reasonably
would be engaged, and does not result from the use of premises,
resources,  proprietary  information,  know-how  or  equipment
owned  or  leased  by  the  Company.    However,  I  will  also
promptly disclose to the Company any such Developments for
the  purpose  of  determining  whether  they  qualify  for  such
exclusion.    I  understand  that  to  the  extent  this  Agreement  is
required  to  be  construed  in  accordance  with  the  laws  of  any
state which precludes a requirement in an employee agreement
to  assign  certain  classes  of  inventions  made  by  an  employee,
this Section 5 will be interpreted not to apply to any invention
which  a  court  rules  and/or  the  Company  agrees  falls  within
such classes.  I also hereby waive all claims to any moral rights
or  other  special  rights  which  I  may  have  or  accrue  in  any
Company-Related Developments.

6.
Documents  and  Other  Materials.    I  will  keep  and
maintain  adequate  and  current  records  of  all  Proprietary
Information and Company-Related Developments developed by
me during my employment, which records will be available to
and remain the sole property of the Company at all times.

All  files,  letters,  notes,  memoranda,  reports,  records,  data,
sketches,  drawings,  notebooks,  layouts,  charts,  quotations  and
proposals,  specification  sheets,  or  other  written,  photographic
or  other  tangible  material  containing  Proprietary  Information,
whether created by me or others, which come into my custody
or possession, are the exclusive property of the Company to be
used  by  me  only  in  the  performance  of  my  duties  for  the
Company.   Any  property  situated  on  the  Company’s  premises
and  owned  by  the  Company,  including  without  limitation
computers,  disks  and  other  storage  media,  filing  cabinets  or
other  work  areas,  is  subject  to  inspection  by  the  Company  at
any time with or without notice.  In the event of the termination
of  my  employment  for  any  reason,  I  will  deliver  to  the
Company

ACTIVE/120725950.2

all  files,  letters,  notes,  memoranda,  reports,  records,  data,
sketches,  drawings,  notebooks,  layouts,  charts,  quotations  and
proposals,  specification  sheets,  or  other  written,  photographic
or  other  tangible  material  containing  Proprietary  Information,
and other materials of  any nature pertaining to  the Proprietary
Information of the Company and to my work, and will not take
or keep in my possession any of the foregoing or any copies.  

to 

respect 

the  Company,  with 

7.
Enforcement of Intellectual Property Rights.  I will
cooperate  fully  with  the  Company,  both  during  and  after  my
employment  with 
the
procurement,  maintenance  and  enforcement  of  Intellectual
Property  Rights  in  Company-Related  Developments.    I  will
sign,  both  during  and  after  the  term  of  this  Agreement,  all
papers,  including  without  limitation  copyright  applications,
patent applications, declarations, oaths, assignments of priority
rights, and powers of attorney, which the Company may deem
necessary or desirable in order to protect its rights and interests
in  any  Company-Related  Development.    If  the  Company  is
unable,  after  reasonable  effort,  to  secure  my  signature  on  any
such papers, I hereby grant a power of attorney by designating
and  appointing  each  officer  of  the  Company  as  my  agent  and
attorney-in-fact to execute any such papers on my behalf, and to
take any and all actions as the Company may deem necessary or
desirable  in  order  to  protect  its  rights  and  interests  in  any
Company-Related Development.

8.

Restrictive Covenants.  

A. Non-Competition Restrictive Covenants

In order to protect the Company’s Proprietary Information and
good  will,  during  my  employment  and  for  a  period  of  one  (1)
year  following  the  termination  of  my  employment  for  any
reason,  unless  the  Company  terminates  my  employment
without Cause (as defined below) or lays me off, or such shorter
period  as  the  Company  designates  in  writing  to  me  in
connection with the ending of my employment relationship (the
“Restricted Period”), I will not directly or indirectly, anywhere
in  the  United  States,  whether  as  owner,  partner,  shareholder,
director,  manager,  consultant, agent, employee, co-venturer,  or
otherwise,  engage  in,  participate  in,  or  perform:    (a)  any  job,
position,  function,  role,  or  activity  that  (i)  is  the  same  as  or
similar to that which I performed for the Company during any
part  of  the  two-year  period  immediately  preceding  the  end  of
my employment with the Company and (ii) involves products,
services,  or  a  line  of  business  (in  each  case,  including  but  not
research,  development,  manufacture,  or
limited 
line  of
commercialization  of  any  products,  services,  or 
business) that is competitive with or that substitutes for or that
eliminates  the  need  for,  any  products,  services,  or  a  line  of
business (in each case, including but not limited to the research,
development,  manufacture,  or  commercialization  of  any
products, services, or a line of business) of the Company at any
time during the two-year period immediately preceding the end
of  my  employment  with  the  Company;  or  (b)  any  other  job,
position,  function,  role,  or  activity  that  would  likely  or
inevitably, even if unintentionally, require or result in the use or
disclosure of the Company’s Proprietary Information or the use
of  the  Company’s  customer  goodwill,  provided  that  this  shall
not prohibit any possible investment in publicly traded stock of
a company representing less than one percent of the

the 

to 

stock of such company.   Furthermore, I acknowledge and agree
that  the  Company  shall  have  the  option  of  enforcing  the
aforementioned non-competition restriction, up to and including
the  full  duration  of  the  Restricted  Period.  In  the  event  the
Company elects to enforce the post-employment portion of the
non-competition restriction, the Company will cause to be paid
to me fifty percent (50%) of my highest annualized base salary
paid  by  the  Company  within  the  two  (2)  years  preceding  the
termination  of  my  employment,  for  as  long  as  the  Company
elects 
to  enforce  said  post-employment  non-competition
restriction,  subject  further  to  limitations  on  payments  owed  to
an  employee  who  has  breached  a  fiduciary  duty  owed  to  the
Company  or  who  has  unlawfully  taken  Company  property  to
the  extent  permitted  by  applicable  law.      I  acknowledge  and
agree that any payments I receive pursuant to this Section 8(a)
shall  reduce  (and  shall  not  be  in  addition  to)  any  severance  or
separation pay that I am otherwise entitled to receive from the
Company  pursuant  to  an  agreement,  plan  or  otherwise.  For
purposes  of  this  Agreement,  and  notwithstanding  anything  to
the contrary in any other agreement between the Company and
me,  “Cause”  shall  mean  a  reasonable  and  good  faith  basis  for
the  Company  to  be  dissatisfied  with  my  job  performance,  my
conduct or my behavior.

B. Non-Solicitation Restrictive Covenants

In order to protect the Company’s Proprietary Information and
good  will,  during  the  Restricted  Period,  I  will  not,  directly  or
indirectly,  in  any  manner,  other  than  for  the  benefit  of  the
Company,  (a)  call  upon,  solicit,  divert,  take  away,  accept  or
conduct  any  business  from  or  with  any  of  the  customers  or
prospective customers of  the Company or  any of  its suppliers,
in  each  case  in  competition  with  the  Company,  and/or  (b)
solicit,  entice,  attempt  to  persuade  any  other  employee  or
consultant  of  the  Company  to  leave  the  Company  for  any
reason or otherwise participate in or facilitate the hire, directly
or  through  another  entity,  of  any  person  who  is  employed  or
engaged by the Company or who was employed or engaged by
the  Company  within  six  months  of  any  attempt  to  hire  such
person.  

I acknowledge that the covenants in this Section 8 are necessary
because the Company’s legitimate business interests cannot be
adequately  protected  solely  by  the  other  covenants  in  this
Agreement.    I  further  acknowledge  and  agree  that  if  I  violate
any  of  the  provisions  of  this  Section  8,  the  running  of  the
Restricted Period will be extended by the time during which I
engage in such violation(s).

Government  Contracts.    I  acknowledge  that  the
9.
Company  may  have  from  time  to  time  agreements  with  other
persons  or  with  the  United  States  Government  or  its  agencies
which  impose  obligations  or  restrictions  on  the  Company
regarding  inventions  made  during  the  course  of  work  under
such  agreements  or  regarding  the  confidential  nature  of  such
work.    I  agree  to  comply  with  any  such  obligations  or
restrictions  upon  the  direction  of  the  Company.  In  addition  to
the  rights  assigned  under  Section  5,  I  also  assign  to  the
Company  (or  any  of  its  nominees)  all  rights  which  I  have  or
acquired in any Developments, full title to which is required to
be  in  the  United  States  under  any  contract  between  the
Company and the United States or any of its agencies.

ACTIVE/120725950.2

10.
Prior Agreements.  I hereby represent that, except as
I  have  fully  disclosed  previously  in  writing  to  the  Company,  I
am not bound by the terms of any agreement with any previous
employer or other party to refrain from using or disclosing any
trade  secret  or  confidential  or  proprietary  information  in  the
course of my employment with the Company or to refrain from
competing,  directly  or  indirectly,  with  the  business  of  such
previous  employer  or  any  other  party.    I  further  represent  that
my  performance  of  all  the  terms  of  this  Agreement  as  an
employee  of  the  Company  does  not  and  will  not  breach  any
agreement  to  keep  in  confidence  proprietary  information,
knowledge  or  data  acquired  by  me  in  confidence  or  in  trust
prior to my employment with the Company. I will not disclose
to the Company or induce the Company to use any confidential
or proprietary information, know-how or material belonging to
any previous employer or others.

11.
Remedies  Upon  Breach.    I  understand  that  the
restrictions  contained  in  this  Agreement  are  necessary  for  the
protection of the business and goodwill of the Company and I
consider  them  to  be  reasonable  for  such  purpose.   Any  breach
of  this  Agreement  is  likely  to  cause  the  Company  substantial
and  irrevocable  damage  and  therefore,  in  the  event  of  such
breach, the Company, in addition to such other remedies which
may  be  available,  will  be  entitled  to  specific  performance  and
other  injunctive  relief,  without  the  posting  of  a  bond.    If  I
violate  this  Agreement,  in  addition  to  all  other  remedies
available to the Company at law, in equity, and under contract, I
agree  that  I  am  obligated  to  pay  all  the  Company’s  costs  of
enforcement  of  this  Agreement,  including  attorneys’  fees  and
expenses.

12.
Publications  and  Public  Statements.    I  will  obtain
the  Company’s  written  approval  before  publishing  or
submitting  for  publication  any  material  that  relates  to  and/or
incorporates any Proprietary Information.  

13.
No  Employment  Obligation.    I  understand  that  this
Agreement  does  not  create  an  obligation  on  the  Company  or
any other person  to  continue my employment.   I  acknowledge
that,  unless  otherwise  agreed  in  a  formal  written  employment
agreement  signed  on  behalf  of  the  Company  by  an  authorized
officer,  my  employment  with  the  Company  is  at  will  and
therefore may be terminated by the Company or me at any time
and for any reason, with or without cause.

Survival  and  Assignment  by  the  Company.    I
14.
understand  that  my  obligations  under  this  Agreement  will
continue in accordance with its express terms regardless of any
changes  in  my  title,  position,  duties,  salary,  compensation  or
benefits or other terms and conditions of employment. I further
understand  that  my  obligations  under  this  Agreement  will
termination  of  my  employment
continue  following 
regardless  of  the  manner  of  such  termination  and  will  be
binding  upon  my  heirs,  executors  and  administrators.    The
Company  will  have  the  right  to  assign  this  Agreement  to  its
affiliates,  successors  and  assigns.    I  expressly  consent  to  be
bound by the provisions of this Agreement for the benefit of the
Company or any parent, subsidiary or affiliate to whose employ
I may be transferred without the necessity that this Agreement
be resigned at the time of such transfer.

the 

15.
Exit  Interview.    If  and  when  I  depart  from  the
Company,  I  may  be  required  to  attend  an  exit  interview.    For
twelve (12) months following termination of my employment, I
will  notify  the  Company  of  any  change  in  my  address  and  of
each subsequent employment or business activity, including the
name  and  address  of  my  employer  or  other  post-Company
employment  plans  and  the  nature  of  my  activities.    If  I  am
named  an  inventor  in  one  or  more  patent  applications  that
resulted  during  my  employment  with  the  Company,  I  agree  to
use  commercially  reasonable  efforts  to  keep  the  Company
apprised  of  my  contact  information  for  an  additional  twenty-
four (24) months.  

Disclosure 

to  Future  Employers.  During 

16.
the
Restricted  Period,  I  will  provide  a  copy  of  this  Agreement  to
any  prospective  employer,  partner  or  co-venturer  prior  to
entering  into  an  employment,  partnership  or  other  business
relationship with such person or entity.

17.
Waiver.  The Company and I acknowledge and agree
that the Company may unilaterally waive my post-employment
non-competition  obligations  under  Section  8(a),  and  in  the
event of such a waiver, the Company is not required to provide
me with the post-employment compensation described therein.
The  Company’s  election  not  to  provide  me  with  the  post-
employment  compensation  described  in  Section  8(a)  shall  be
deemed  a  waiver  of  my  post-employment  non-competition
obligations under Section 8(a). Otherwise, no waiver of any of
my  obligations  under  this  Agreement  shall  be  effective  unless
made in writing by the Company. The failure of the Company
to  require  my  performance  of  any  term  or  obligation  of  this
Agreement,  or  the  waiver  of  any  breach  of  this  Agreement,
shall  not  prevent  the  Company’s  subsequent  enforcement  of
such  term  or  obligation  or  be  deemed  a  waiver  of  any
subsequent breach.

18.
Severability.    In  case  any  provisions  (or  portions
thereof)  contained  in  this  Agreement  shall,  for  any  reason,  be
held  invalid,  illegal  or  unenforceable  in  any  respect,  such
invalidity, illegality or unenforceability shall not affect the other
provisions  of  this  Agreement,  and  this  Agreement  shall  be
construed as if such invalid, illegal or unenforceable provision
had never been contained herein.  If, moreover, any one or more
of  the  provisions  contained  in  this  Agreement  shall  for  any
reason  be  held  to  be  excessively  broad  as  to  duration,
geographical scope, activity or subject, it shall be construed by
limiting  and  reducing  it,  so  as  to  be  enforceable  to  the  extent
compatible with the applicable law as it shall then appear.

19.
Interpretation.  This Agreement will be deemed to be
made and entered into in the Commonwealth of Massachusetts,
and  will  in  all  respects  be  interpreted,  enforced  and  governed
under  the  laws  of  the  Commonwealth  of  Massachusetts.    I
hereby agree to consent to personal jurisdiction of the state and
federal courts situated within Suffolk County, Massachusetts for
purposes of enforcing this Agreement, and waive any objection
that  I  might  have  to  personal  jurisdiction  or  venue  in  those
courts.

20.
Independence of Obligations.  My obligations under
this  Agreement  are  independent  of  any  obligation,  contractual
or otherwise, the Company has to me.  The Company’s breach
of  any  such  obligation  shall  not  be  a  defense  against  the
enforcement  of 
limit  my
obligations under this Agreement.  

this  Agreement  or  otherwise 

to 

information,  without  notice 

21.
Protected Disclosures; Defend Trade Secrets Act of
2016.    I  understand  that  nothing  contained  in  this  Agreement
limits my ability to communicate with any federal, state or local
governmental  agency  or  commission,  including  to  provide
documents  or  other 
the
Company.    I  also  understand  that  nothing  in  this  Agreement
limits my ability to share compensation information concerning
myself or others, except that this does not permit me to disclose
compensation  information  concerning  others  that  I  obtain
because my job responsibilities require or allow access to such
information.    I  understand  that  pursuant  to  the  federal  Defend
Trade  Secrets  Act  of  2016,  I  shall  not  be  held  criminally  or
civilly liable under any federal or state trade secret law for the
disclosure of a trade secret that (a) is made (i) in confidence to a
federal,  state,  or  local  government  official,  either  directly  or
indirectly,  or  to  an  attorney;  and  (ii)  solely  for  the  purpose  of
reporting or investigating a suspected violation of law; or (b) is
made  in  a  complaint  or  other  document  filed  in  a  lawsuit  or
other proceeding, if such filing is made under seal.

22.
Other  Agreements;  Amendment.    This  Agreement
supplements  and  does  not  supersede  any  other  confidentiality,
assignment  of  inventions  or  restrictive  covenant  agreement
between  the  Company  and  me.    In  the  event  of  any  conflict
between  this  Agreement  and  my  employment  agreement  with
the  Company  dated  or  on  about 
the  date  hereof,  my
employment  agreement  shall  control.  Otherwise,  to  the  extent
that  this  Agreement  addresses  other  subject  matters,  this
Agreement  supersedes  any  other  agreements  between  the
Company  and  me  with  respect  to  such  subject  matters.    This
Agreement  may  be  amended  only  in  a  written  agreement
executed by a duly authorized officer of the Company and me.

ACTIVE/120725950.2

[Remainder of Page Intentionally Left Blank]

I UNDERSTAND THAT THIS AGREEMENT AFFECTS IMPORTANT RIGHTS.  BY SIGNING 

BELOW, I CERTIFY THAT I HAVE READ IT CAREFULLY AND AM SATISFIED THAT I UNDERSTAND 
IT COMPLETELY.  I ACKNOWLEDGE I HAVE BEEN NOTIFIED BY THE COMPANY OF THE RIGHT 
TO CONSULT WITH COUNSEL OF MY OWN CHOOSING PRIOR TO SIGNING THIS AGREEMENT, 
AND THAT I WAS PROVIDED WITH THIS AGREEMENT BY THE EARLIER OF A FORMAL OFFER
OF EMPLOYMENT OR TEN (10) BUSINESS DAYS BEFORE THE COMMENCEMENT OF MY
EMPLOYMENT.

I ACKNOWLEDGE AND AGREE THAT THE TERMS OF THIS AGREEMENT WILL APPLY TO 
MY ENTIRE SERVICE RELATIONSHIP WITH THE COMPANY, INCLUDING WITHOUT LIMITATION 
ANY PERIOD OF SERVICE PRIOR TO THE DATE OF MY SIGNATURE BELOW.   

IN WITNESS WHEREOF, the undersigned has executed this Agreement as a sealed instrument and it shall 

become effective upon the later of (i) the full execution by both parties; or (ii) ten (10) business days after the 
Company provided me with notice of this Agreement.    

EMPLOYEE

Signed:  /s/ Tracey Sacco

Type or print name:  Tracey Sacco

Date:  1/13/2023

SCHOLAR ROCK, INC.

/s/ Caryn Parlavecchio
Authorized Signatory

ACTIVE/120649963.3

Date:  1/13/2023

EXHIBIT A

To:

Scholar Rock, Inc.

From: Tracey Sacco

Date:  1/13/2023

SUBJECT:

Prior Inventions

The following is a complete list of all inventions or improvements relevant to the subject matter of my
employment by the Company that have been made or conceived or first reduced to practice by me alone or jointly with
others prior to my engagement by the Company:

X

No inventions or improvements

See below:

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

Additional sheets attached

The following is a list of all patents and patent applications in which I have been named as an inventor:

X

None

See below:

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

ACTIVE/120649963.3

6




Exhibit 21.1

SUBSIDIARIES OF SCHOLAR ROCK HOLDING CORPORATION

Subsidiary
Scholar Rock, Inc.
Scholar Rock Securities Corporation

Jurisdiction
Delaware
Massachusetts

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

(1) Registration Statement (Form S-3 Nos. 333-254057, 333-249715, 333-231920 and 333-268329) of

Scholar Rock Holding Corporation,

(2) Registration Statement (Form S-8 Nos. 333-263349, 333-238082 and 333-256065) pertaining to the
2018 Stock Option and Incentive Plan and 2018 Employee Stock Purchase Plan, of Scholar Rock
Holding Corporation,

(3) Registration Statement (Form S-8 No. 333-225192) pertaining to the 2017 Stock Option and

Incentive Plan, 2018 Stock Option and Incentive Plan, and 2018 Employee Stock Purchase Plan, of
Scholar Rock Holding Corporation,

(4) Registration Statement (Form S-8 Nos. 333-266658 and 333-268327) pertaining to the 2022

Inducement Equity Plan, of Scholar Rock Holding Corporation, and

(5) Registration Statement (Form S-8 No. 333-270318) pertaining to the 2018 Stock Option and

Incentive Plan, 2018 Employee Stock Purchase Plan, and 2022 Inducement Equity Plan, of Scholar
Rock Holding Corporation

of our report dated March 19, 2024, with respect to the consolidated financial statements of Scholar Rock
Holding Corporation, included in this Annual Report (Form 10-K) of Scholar Rock Holding Corporation for
the year ended December 31, 2023.

/s/ Ernst & Young LLP

Boston, Massachusetts
March 19, 2024

Exhibit 31.1

I, Jay T. Backstrom, certify that:

Certifications

1. I have reviewed this Annual Report on Form 10-K of Scholar Rock Holding Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a

material fact necessary to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly

present in all material respects the financial condition, results of operations and cash flows of the registrant
as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls

and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over
financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to

be designed under our supervision, to ensure that material information relating to the registrant,
including its consolidated subsidiaries, is made known to us by others within those entities,
particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial

reporting to be designed under our supervision, to provide reasonable assurance regarding the
reliability of financial reporting and the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this
report our conclusions about the effectiveness of the disclosure controls and procedures, as of the
end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that

occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the
case of an annual report) that has materially affected, or is reasonably likely to materially affect, the
registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal

control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board
of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over

financial reporting which are reasonably likely to adversely affect the registrant’s ability to record,
process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant

role in the registrant’s internal control over financial reporting.

Date: March 19, 2024

/s/ Jay T. Backstrom
Jay T. Backstrom
President and Chief Executive Officer
(Principal Executive Officer)

Exhibit 31.2

I, Edward H. Myles, certify that:

Certifications

1. I have reviewed this Annual Report on Form 10-K of Scholar Rock Holding Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a

material fact necessary to make the statements made, in light of the circumstances under which such
statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly

present in all material respects the financial condition, results of operations and cash flows of the registrant
as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls

and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over
financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to

be designed under our supervision, to ensure that material information relating to the registrant,
including its consolidated subsidiaries, is made known to us by others within those entities,
particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial

reporting to be designed under our supervision, to provide reasonable assurance regarding the
reliability of financial reporting and the preparation of financial statements for external purposes in
accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this
report our conclusions about the effectiveness of the disclosure controls and procedures, as of the
end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that

occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the
case of an annual report) that has materially affected, or is reasonably likely to materially affect, the
registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal

control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board
of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over

financial reporting which are reasonably likely to adversely affect the registrant’s ability to record,
process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant

role in the registrant’s internal control over financial reporting.

Date: March 19, 2024

/s/ Edward H. Myles
Edward H. Myles
Chief Operating Officer & Chief Financial Officer
(Principal Financial and Accounting Officer)

Exhibit 32.1

CERTIFICATION 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 Scholar Rock Holding Corporation (the
“Company”) for the year ended December 31, 2023 as filed with the Securities and Exchange Commission on the
date hereof (the “Report”), each of the undersigned officers of the Company certifies, pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, to his or her knowledge, that:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d), as applicable, of the Securities

Exchange Act of 1934, as amended; and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results

of operations of the Company.

This certification is being provided pursuant to 18 U.S.C. 1350 and is not to be deemed a part of the Report,

nor is it to be deemed to be “filed” for any purpose whatsoever.

Date: March 19, 2024

Date: March 19, 2024

/s/ Jay T. Backstrom
Jay T. Backstrom
President and Chief Executive Officer

/s/ Edward H. Myles
Edward H. Myles
Chief Operating Officer & Chief Financial Officer

SCHOLAR ROCK HOLDING CORPORATION
COMPENSATION RECOVERY POLICY
Adopted as of November 28, 2023

EXHIBIT 97

Scholar  Rock  Holding  Corporation,  a  Delaware  corporation  (the  “Company”),  has  adopted  a
Compensation Recovery Policy (this “Policy”) as described below.  

1.

Overview

The  Policy  sets  forth  the  circumstances  and  procedures  under  which  the  Company  shall  recover
Erroneously Awarded Compensation from Covered Persons (as defined below) in accordance with
rules  issued  by  the  United  States  Securities  and  Exchange  Commission  (the  “SEC”)  under  the
Securities  Exchange  Act  of  1934,  as  amended  (the  “Exchange  Act”),  and  the  Nasdaq  Stock
Market.  

2.

Compensation Recovery Requirement

In  the  event  the  Company  is  required  to  prepare  a  Financial  Restatement,  the  Company  shall
recover  reasonably  promptly  all  Erroneously  Awarded  Compensation  with  respect  to  such
Financial Restatement.

3.

Definitions

a. “Applicable  Recovery  Period”  means  the  three  completed  fiscal  years  immediately
preceding the Restatement Date for a Financial Restatement. In addition, in the event
the  Company  has  changed  its  fiscal  year:  (i)  any  transition  period  of  less  than  nine
months  occurring  within  or  immediately  following  such  three  completed  fiscal  years
shall also be part of such Applicable Recovery Period and (ii) any transition period of
nine to 12 months will be deemed to be a completed fiscal year.

b. “Applicable Rules” means any rules or regulations adopted by the Exchange pursuant
to Rule 10D-1 under the Exchange Act and any applicable rules or regulations adopted
by the SEC pursuant to Section 10D of the Exchange Act.

c. “Board” means the Board of Directors of the Company.

d. “Committee”  means  the  Compensation  Committee  of  the  Board  or,  in  the  absence  of

such committee, a majority of independent directors serving on the Board.

e. “Covered Person” means any Executive Officer. A person’s status as a Covered Person
with respect to Erroneously Awarded Compensation shall be determined as of the time
of  receipt  of  such  Erroneously  Awarded  Compensation  regardless  of  the  person’s
current role or status with the Company (e.g., if a person began service as an Executive
Officer after the beginning of an Applicable Recovery Period, that person would not be
considered  a  Covered  Person  with  respect  to  Erroneously  Awarded  Compensation
received  before  the  person  began  service  as  an  Executive  Officer,  but  would  be
considered  a  Covered  Person  with  respect  to  Erroneously  Awarded  Compensation
received after the person began service as an Executive Officer where such person

[Signature Page to Scholar Rock Holding Corporation Board Consent]

served  as  an  Executive  Officer  at  any  time  during  the  performance  period  for  such
Erroneously Awarded Compensation).

f.

“Effective Date” means December 1, 2023.

g. “Erroneously  Awarded  Compensation”  means  the  amount  of  any  Incentive-Based
Compensation received by a Covered Person on or after the Effective Date and during
the  Applicable  Recovery  Period  that  exceeds  the  amount  that  otherwise  would  have
been received by the Covered Person had such compensation been determined based on
the restated amounts in a Financial Restatement, computed without regard to any taxes
paid.  Calculation  of  Erroneously  Awarded  Compensation  with  respect  to  Incentive-
Based Compensation based on stock price or total shareholder return, where the amount
of  Erroneously  Awarded  Compensation  is  not  subject  to  mathematical  recalculation
directly from the information in a Financial Restatement, shall be based on a reasonable
estimate  of  the  effect  of  the  Financial  Restatement  on  the  stock  price  or  total
shareholder  return  upon  which  the  Incentive-Based  Compensation  was  received,  and
the  Company  shall  maintain  documentation  of  the  determination  of  such  reasonable
estimate  and  provide  such  documentation  to  the  Exchange  in  accordance  with  the
Applicable Rules. Incentive-Based Compensation is deemed received, earned or vested
when the Financial Reporting Measure is attained, not when the actual payment, grant
or vesting occurs.

h. “Exchange” means the Nasdaq Stock Market LLC.

i.

j.

“Executive  Officer”  means  any  person  who  served  the  Company  in  any  of  the
following  roles  at  any  time  during  the  performance  period  applicable  to  Incentive-
Based  Compensation  and  received  Incentive-Based  Compensation  after  beginning
service  in  any  such  role  (regardless  of  whether  such  Incentive-Based  Compensation
was received during or after such person’s service in such role): the president, principal
financial officer, principal accounting officer (or if there is no such accounting officer,
the  controller),  any  vice  president  in  charge  of  a  principal  business  unit,  division  or
function  (such  as  sales,  administration  or  finance),  any  other  officer  who  performs  a
policy  making  function  or  any  other  person  who  performs  similar  policy  making
functions  for  the  Company.  Executive  officers  of  parents  or  subsidiaries  of  the
Company  may  be  deemed  executive  officers  of  the  Company  if  they  perform  such
policy making functions for the Company.

“Financial  Reporting  Measures”  mean measures  that  are  determined  and  presented  in
accordance  with  the  accounting  principles  used  in  preparing  the  Company’s  financial
statements,  any  measures  that  are  derived  wholly  or  in  part  from  such  measures
(including,  for  example,  a  non-GAAP  financial  measure),  and  stock  price  and  total
shareholder return.  

k. “Financial Restatement” means a restatement of previously issued financial statements
of the Company due to the material noncompliance of the Company with any financial
reporting requirement under the securities laws, including any required restatement to
correct  an  error  in  previously-issued  financial  statements  that  is  material  to  the
previously-issued financial statements or that would result in a material misstatement if
the error were corrected in the current period or left uncorrected in the current period.

l.

“Incentive-Based  Compensation”  means  any  compensation  provided,  directly  or
indirectly, by the Company or any of its subsidiaries that is granted, earned or vested
based, in whole or in part, upon the attainment of a Financial Reporting Measure.

m. “Restatement Date” means, with respect to a Financial Restatement, the earlier to occur
of:  (i)  the  date  the  Board  concludes,  or  reasonably  should  have  concluded,  that  the
Company  is  required  to  prepare  the  Financial  Restatement  or  (ii)  the  date  a  court,
regulator or other legally authorized body directs the Company to prepare the Financial
Restatement.

4.

Exception to Compensation Recovery Requirement

The  Company  may  elect  not  to  recover  Erroneously  Awarded  Compensation  pursuant  to  this
Policy if the Committee determines that recovery would be impracticable, and one or more of the
following conditions, together with any further requirements set forth in the Applicable Rules, are
met:  (i)  the  direct  expense  paid  to  a  third  party,  including  outside  legal  counsel,  to  assist  in
enforcing  this  Policy  would  exceed  the  amount  to  be  recovered,  and  the  Company  has  made  a
reasonable  attempt  to  recover  such  Erroneously  Awarded  Compensation;  or  (ii)  recovery  would
likely cause an otherwise tax-qualified retirement plan to fail to be so qualified under applicable
regulations.  

5.

Tax Considerations

To  the  extent  that,  pursuant  to  this  Policy,  the  Company  is  entitled  to  recover  any  Erroneously
Awarded Compensation that is received by a Covered Person, the gross amount received (i.e., the
amount  the  Covered  Person  received,  or  was  entitled  to  receive,  before  any  deductions  for  tax
withholding or other payments) shall be returned by the Covered Person.

6.

Method of Compensation Recovery

The  Committee  shall  determine,  in  its  sole  discretion,  the  method  for  recovering  Erroneously
Awarded Compensation hereunder, which may include, without limitation, any one or more of the
following:

a.

requiring reimbursement of cash Incentive-Based Compensation previously paid;

b. seeking  recovery  of  any  gain  realized  on  the  vesting,  exercise,  settlement,  sale,

transfer or other disposition of any equity-based awards;

c. cancelling  or  rescinding  some  or  all  outstanding  vested  or  unvested  equity-based

awards;

d. adjusting or withholding from unpaid compensation or other set-off;

e. cancelling or offsetting against planned future grants of equity-based awards; and/or

f.

any other method permitted by applicable law or contract.

Notwithstanding the foregoing, a Covered Person will be deemed to have satisfied such person’s
obligation  to  return  Erroneously  Awarded  Compensation  to  the  Company  if  such  Erroneously
Awarded Compensation is returned in the exact same form in which it was received; provided that
equity  withheld  to  satisfy  tax  obligations  will  be  deemed  to  have  been  received  in  cash  in  an
amount equal to the tax withholding payment made.

7.

Policy Interpretation

This Policy shall be interpreted in a manner that is consistent with the Applicable Rules and any
other  applicable  law.  The  Committee  shall  take  into  consideration  any  applicable  interpretations
and guidance of the SEC in interpreting this Policy, including, for example, in determining whether
a financial restatement qualifies as a Financial Restatement hereunder. To the extent the Applicable
Rules require recovery of Incentive-Based Compensation in additional circumstances besides those
specified above, nothing in this Policy shall be deemed to limit or restrict the right or obligation of
the  Company  to  recover  Incentive-Based  Compensation  to  the  fullest  extent  required  by  the
Applicable Rules.

8.

Policy Administration

This Policy shall be administered by the Committee; provided, however, that the Board shall have
exclusive authority to authorize the Company to prepare a Financial Restatement. In doing so, the
Board may rely on a recommendation of the Audit Committee of the Board. The Committee shall
have such powers and authorities related to the administration of this Policy as are consistent with
the  governing  documents  of  the  Company  and  applicable  law.  The  Committee  shall  have  full
power  and  authority  to  take,  or  direct  the  taking  of,  all  actions  and  to  make  all  determinations
required or provided for under this Policy and shall have full power and authority to take, or direct
the taking of, all such other actions and make all such other determinations not inconsistent with
the  specific  terms  and  provisions  of  this  Policy  that  the  Committee  deems  to  be  necessary  or
appropriate  to  the  administration  of  this  Policy.    The  interpretation  and  construction  by  the
Committee  of  any  provision  of  this  Policy  and  all  determinations  made  by  the  Committee  under
this policy shall be final, binding and conclusive.  

9.

Compensation Recovery Repayments not Subject to Indemnification

Notwithstanding  anything  to  the  contrary  set  forth  in  any  agreement  with,  or  the  organizational
documents  of,  the  Company  or  any  of  its  subsidiaries,  Covered  Persons  are  not  entitled  to
indemnification for Erroneously Awarded Compensation or for any losses arising out of or in any
way related to Erroneously Awarded Compensation recovered under this Policy.

Management Team

Jay Backstrom, MD, MPH

President & Chief Executive Officer

Junlin Ho, JD

General Counsel & Corporate Secretary

Jing Marantz, MD, PhD, MBA

Chief Medical Officer

Ted Myles, MBA

Chief Operating Officer & Chief Financial Officer

Caryn Parlavecchio

Chief Human Resources Officer

Mo Qatanani, PhD

Chief Scientific Officer

Tracey Sacco

Chief Commercial Officer

Board of Directors 

David Hallal

Michael Gilman, PhD

Chief Executive Officer, Arrakis Therapeutics, Inc.

Chairman of the Board of Directors, Scholar Rock®

Chairman and Chief Executive Officer of ElevateBio, LLC

Amir Nashat, ScD

Managing Partner, Polaris Partners

Srini Akkaraju, MD, PhD

Katie Peng

Founder and Managing Partner, Samsara BioCapital

Chief Commercial Officer, Denali Therapeutics 

Jay Backstrom, MD, MPH

Joshua Reed

President & Chief Executive Officer, Scholar Rock® 

Chief Financial Officer, Omega Therapeutics

Akshay Vaishnaw MD, PhD

Chief Innovation Officer, Alnylam Pharmaceuticals, Inc.

Richard Brudnick 

Chief Business Officer, Prime Medicine 

Kristina Burow

Managing Director, ARCH Venture Partners

Jeffrey S. Flier, MD

Higginson Professor of Physiology and Medicine & Harvard 

University Distinguished Service Professor; 

Former Dean of Harvard Medical School

Annual Meeting of Stockholders

The Annual Meeting of Stockholders will be held by  
virtual meeting at 12:00 PM, EDT on June 27, 2024,  
and can be accessed from the following website:  
https://www.virutualshareholdermeeting.com/SRRK2024.  
You may attend the meeting via the Internet by  

Transfer Agent

Computershare

P.O. Box 505000

Louisville, KY 40233-5000

(800) 736-3001 

logging in with your 16-digit control number.

SEC Form 10-K

Independent Auditors

Ernst & Young, LLP

Investor Inquiries

ir@scholarrock.com

Stock Listing

NASDAQ: SRRK

A copy of our Form 10-K filed with the Securities and Exchange 

Commission (SEC) is available free of charge on the SEC’s 
website at www.sec.gov or from the company’s investor relations 
department by emailing ir@scholarrock.com or sending a written 

request to Scholar Rock’s investor relations department at:

Investor Relations

Scholar Rock, Inc.

301 Binney Street, 3rd Floor

Cambridge, MA 02142

301 Binney Street, 3rd Floor
Cambridge, MA 02142

(857) 259.3860 
www.scholarrock.com
info@scholarrock.com