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Solid Biosciences Inc.

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FY2022 Annual Report · Solid Biosciences Inc.
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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, 2022 
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 001-38360

Solid Biosciences Inc. 

(Exact name of Registrant as specified in its Charter) 

Delaware
(State or other jurisdiction of
incorporation or organization)
500 Rutherford Avenue, Third Floor
Charlestown, MA
(Address of principal executive offices)

90-0943402
(I.R.S. Employer
Identification No.)

02129
(Zip Code)

Registrant’s telephone number, including area code: (617) 337-4680 

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

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

Trading Symbol
SLDB

Name of exchange on which registered
The Nasdaq Global Select Market

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

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 Section 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
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 Act).    YES  ☐    NO  ☒ 
As of June 30, 2022, the last business day of the Registrant’s most recently completed second fiscal quarter, the aggregate market value of the Registrant’s common stock held by non-affiliates 
was $46.2 million, based on the last reported sale price of such stock on the Nasdaq Global Select Market as of such date.  
The number of shares of Registrant’s common stock outstanding as of March 20, 2023 was 19,573,132. 

Accelerated filer
Smaller reporting company

☐
☒

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
The registrant intends to file a definitive proxy statement pursuant to Regulation 14A within 120 days of the end of the fiscal year ended December 31, 2022. Portions of such definitive proxy 
statement are incorporated by reference into Part III of this Annual Report on Form 10-K.

DOCUMENTS INCORPORATED BY REFERENCE

 
 
 
 
 
 
Table of Contents

PART I 

Item 1.
Item 1A.
Item 1B.
Item 2.
Item 3.
Item 4.

Business
Risk Factors
Unresolved Staff Comments
Properties
Legal Proceedings
Mine Safety Disclosures

PART II 

Item 5.
Item 6.
Item 7.
Item 7A.
Item 8.
Item 9.
Item 9A.
Item 9B.
Item 9C. 

Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities
Reserved
Management’s Discussion and Analysis of Financial Condition and Results of Operations
Quantitative and Qualitative Disclosures About Market Risk
Financial Statements and Supplementary Data
Changes in and Disagreements with Accountants on Accounting and Financial Disclosure
Controls and Procedures
Other Information
Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

110

PART III 

Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

Directors, Executive Officers and Corporate Governance
Executive Compensation
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
Certain Relationships and Related Transactions, and Director Independence
Principal Accounting Fees and Services

PART IV 

Item 15.
Item 16.

Exhibits and Financial Statement Schedules
Form 10-K Summary

SIGNATURES
CONSOLIDATED FINANCIAL STATEMENTS

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F-2

 
 
 
 
 
 
 
 
  
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS AND INDUSTRY DATA

This Annual Report on Form 10-K includes forward-looking statements, which involve risks and uncertainties. These forward-looking statements 

can be identified by the use of forward-looking terminology, including the terms “believe,” “estimate,” “project,” “anticipate,” “expect,” “seek,” “predict,” 
“aim,” “continue,” “possible,” “intend,” “may,” “might,” “will,” “could,” “would” or “should” or, in each case, their negative, or other variations or 
comparable terminology. These forward-looking statements include all matters that are not historical facts. They appear in a number of places throughout 
this Annual Report on Form 10-K. We derive many of our forward-looking statements from our operating budgets and forecasts, which are based upon 
many detailed assumptions. While we believe that our assumptions are reasonable, we caution that it is very difficult to predict the impact of known 
factors, and, of course, it is impossible for us to anticipate all factors that could affect our actual results. All forward-looking statements are based upon 
information available to us on the date of this Annual Report on Form 10-K. 

The forward-looking statements in this Annual Report on Form 10-K include, among other things, statements about: 

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the timing, progress and results of preclinical studies and clinical trials for our neuromuscular (e.g., SGT-003, AVB-202-TT), cardiac (e.g., 
AVB-401) or other future candidates;  

our ability to establish or maintain collaborations or strategic relationships, including our collaboration with Ultragenyx Pharmaceutical Inc., or 
Ultragenyx; 

our ability to obtain and maintain U.S. regulatory approval of our neuromuscular (e.g., SGT-003, AVB-202-TT), cardiac (e.g., AVB-401) or 
other future candidates, and the timing and scope thereof; 

our ability to obtain and maintain foreign regulatory approvals of our neuromuscular (e.g., SGT-003, AVB-202-TT), cardiac (e.g., AVB-401) or 
other future candidates, and the timing and the scope thereof; 

the size of the patient populations and potential market opportunity for our neuromuscular (e.g., SGT-003, AVB-202-TT), cardiac (e.g., AVB-
401) or other future candidates, if approved for commercial use; 

our manufacturing capabilities and strategy, including the scalability and commercial viability of our manufacturing methods and processes; 

our plans to develop and commercialize our neuromuscular (e.g., SGT-003, AVB-202-TT), cardiac (e.g., AVB-401) or other future candidates, 
if approved;  

the pricing and reimbursement of our neuromuscular (e.g., SGT-003, AVB-202-TT), cardiac (e.g., AVB-401) or other future candidates we may 
develop, if approved;   

the establishment of sales, marketing and distribution capabilities and entry into agreements with third parties to market and sell our 
neuromuscular (e.g., SGT-003, AVB-202-TT), cardiac (e.g., AVB-401) or other future candidates, if approved; 

the rate and degree of market acceptance and clinical utility of our neuromuscular (e.g., SGT-003, AVB-202-TT), cardiac (e.g., AVB-401) or 
other future candidates we may develop and for which we may receive approval; 

our plans to develop our platform technologies;

our expectations related to our use of capital resources; 

our estimates regarding expenses, ongoing losses, future revenue, capital requirements and need for and ability to obtain additional financing; 

our intellectual property position; 

our competitive and market position; 

developments relating to our competitors and our industry; 

the impact of the COVID-19 pandemic on our business and operations and our future financial results; 

our ability to continue as a going concern; and

the impact of laws and regulations on our operations. 

By their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or 

may not occur in the future. We caution you that forward-looking statements are not guarantees of future performance and that our actual results of 
operations, financial condition, business and prospects may differ materially from those made in or suggested by the forward-looking statements contained 
in this Annual Report on Form 10-K. In addition, even if our results of operations, financial condition, business and prospects are consistent with the 
forward-looking 

ii

 
statements contained in this Annual Report on Form 10-K, those results may not be indicative of results in subsequent periods. 

You should read this Annual Report on Form 10-K and the documents that we have filed as exhibits to this Annual Report on Form 10-K completely 
and with the understanding that our actual future results may be materially different from what we expect. We qualify all of our forward-looking statements 
by these cautionary statements. The forward-looking statements contained in this Annual Report on Form 10-K are made as of the date of this Annual 
Report on Form 10-K, and we do not assume any obligation to update any forward-looking statements, whether as a result of new information, future 
events or otherwise, except as required by applicable law.

This Annual Report on Form 10-K includes statistical and other industry and market data that we obtained from industry publications and research, 
surveys and studies conducted by third parties as well as our own estimates of potential market opportunities based on our analysis of these data, research, 
surveys and studies. All of the market data used in this Annual Report on Form 10-K involves a number of assumptions and limitations, and you are 
cautioned not to give undue weight to such data. Industry publications and third-party research, surveys and studies generally indicate that their information 
has been obtained from sources believed to be reliable, although they do not guarantee the accuracy or completeness of such information. Our estimates of 
the potential market opportunities for our candidates include a number of key assumptions based on our industry knowledge, industry publications and 
third-party research, surveys and studies, which may be based on a small sample size and fail to accurately reflect market opportunities. While we believe 
that our internal assumptions are reasonable, no independent source has verified such assumptions.

As used in this Annual Report on Form 10-K, the terms “Solid,” “the Company,” “we,” “us” and “our” refer to Solid Biosciences Inc. unless the 

context indicates otherwise. 

Our business is subject to a number of risks that if realized could materially affect our business, operating results and financial condition and the 

trading price of our common stock could decline. These risks are discussed more fully in the “Risk Factors” section of this Annual Report on Form 10-K. 
These risks include the following:

RISK FACTOR SUMMARY

•

Our stockholders may not realize a benefit from the Acquisition and the related private placement commensurate with the ownership dilution 
they experienced in connection with the Acquisition and the related private placement.

• We have incurred significant net losses since inception and anticipate that we will continue to incur net losses for the foreseeable future and 

may never achieve or maintain profitability.

• We will need additional funding, which may not be available on acceptable terms, or at all. Failure to obtain this necessary capital when needed 

may force us to delay, limit or terminate our product development efforts or other operations.

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Unfavorable global economic conditions could harm our business, financial condition or results of operations.

• We hold a portion of our cash and cash equivalents that we use to meet our working capital and operating expense needs in deposit accounts 

that could be adversely affected if the financial institutions holding such funds fail.

• We have never generated revenue from product sales and do not expect to do so for the foreseeable future, if ever.

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Our limited operating history may make it difficult for our stockholders to evaluate the success of our business to date and to assess our future 
viability.

The COVID-19 pandemic or other pandemics may affect our ability to initiate and complete current or future preclinical studies or clinical 
trials, disrupt regulatory activities, disrupt our manufacturing and supply chain or have other adverse effects on our business and operations. In 
addition, this pandemic may continue to adversely impact economies worldwide, which could result in adverse effects on our business and 
operations.

One of our clinical trials has been placed on clinical hold by the FDA in the past, and we cannot guarantee that similar events will not happen 
in future clinical trials for other candidates.

Our gene transfer candidates are based on novel technology, which makes it difficult to predict the time and cost of development and of 
subsequently obtaining regulatory approval.

Our gene transfer candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval, 
limit their commercial potential or result in significant negative consequences following any potential marketing approval.

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• We have never completed a clinical trial and may be unable to do so for any product candidates we may develop, including SGT-003, AVB-

202-TT and AVB-401.

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Success in preclinical studies or early clinical trials may not be indicative of results obtained in later trials.

Preliminary or interim data that we announce or publish from time to time may change as more data become available and are subject to audit 
and verification procedures that could result in material changes in the final data.

• We may encounter substantial delays in our clinical trials or we may fail to demonstrate safety and efficacy to the satisfaction of applicable 

regulatory authorities.

• We may find it difficult to enroll patients in our clinical trials, which could delay or prevent us from proceeding with clinical trials of SGT-003, 

AVB-202-TT, AVB-401 or other future candidates.

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Even if we complete the necessary clinical trials, we cannot predict when, or if, we will obtain regulatory approval to commercialize SGT-003 
or other current and future candidates and the approval may be for a more narrow indication than we seek.

• We face significant competition.

• We may not be successful in finding strategic collaborators for continuing development of SGT-003, AVB-202-TT, AVB-401 or future 

candidates or platform technologies, or for successfully commercializing or competing in the market for certain indications.

• We have limited gene therapy manufacturing experience and could experience production problems and delays in obtaining regulatory 

approval of our manufacturing processes, which could result in delays in the development or commercialization of SGT-003 or other current 
and future candidates. In addition, changes to manufacturing sites or processes, or formulations for our product candidates may result in 
additional cost or delay.

• We expect to utilize third parties to conduct our product manufacturing for the foreseeable future. Therefore, we are subject to the risk that 

these third parties may not perform satisfactorily or meet regulatory requirements.

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Negative results for other gene therapy candidates, poor public opinion and increased regulatory scrutiny of gene therapy may unsuccessful 
adversely affect our ability to conduct our business or obtain regulatory approvals for SGT-003 or other gene transfer candidates.

• We heavily rely on certain in-licensed patents and other intellectual property rights in connection with our development of SGT-003, AVB-202-
TT, AVB-401 and other future candidates and may be required to acquire or license additional patents or other intellectual property rights to 
continue to develop and commercialize SGT-003 and other current and future candidates.

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If we are unable to obtain and maintain patent protection for our product candidates, or if the scope of the patent protection obtained is not 
sufficiently broad, our competitors could develop and commercialize products similar or identical to ours, and our ability to successfully 
commercialize our product candidates may be adversely affected.

Our intellectual property licenses with third parties may be subject to disagreements over contract interpretation, which could narrow the scope 
of our rights to the relevant intellectual property or technology or increase our financial or other obligations to our licensors.

If we cannot comply with Nasdaq’s continued listing standards, our common stock could be delisted, which would harm our business, the 
trading price of our common stock, our ability to raise additional capital and the liquidity of the market for our common stock.

The price of our common stock has been, and in the future is likely to be, volatile and fluctuate substantially, which could result in substantial 
losses for holders of our common stock.

Our October 2022 reverse stock split may decrease the liquidity of the shares of our common stock.

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Item 1. Business. 

Overview 

PART I 

We are a life science company focused on advancing a portfolio of neuromuscular and cardiac programs, including SGT-003, a differentiated gene 

therapy candidate, for the treatment of Duchenne muscular dystrophy, or Duchenne; AVB-202-TT, a gene therapy program for the treatment of Friedreich’s 
ataxia, or FA; AVB-401, a gene therapy program for the treatment of BAG3-mediated dilated cardiomyopathy; and additional assets for the treatment of 
undisclosed cardiac diseases. We aim to be a center of excellence, bringing together those with expertise in science, technology, disease management and 
care. Patient-focused and founded by those directly impacted by Duchenne, our mandate is to improve the daily lives of patients living with these 
devastating diseases.

Solid was purpose-built to advance the best science and accelerate the discovery and development of treatments that may benefit all patients with 

Duchenne. As Solid expands to bring meaningful treatments to patients living with other neuromuscular and cardiac diseases, the values and guiding 
principles that drive us continue. Our corporate vision is to build an innovation platform enabling the discovery and development of high-value genetic 
medicines for neuromuscular and cardiac diseases by integrating internal capabilities, including a vector core, use of validated animal models, optimized 
expression cassettes, novel capsids and regulatory elements, and collaborations with leaders in related clinical and research fields. Our mission, which 
guides our operations, is to treat and change the course of neuromuscular and cardiac diseases at all stages. Underscoring this mission, our disease-focused 
business model is founded on the following fundamental principles:

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identify and develop meaningful therapies for patients with neuromuscular and cardiac diseases;

bring together the leading experts in neuromuscular and cardiac diseases, science, technology, disease management and care; and 

be guided by the needs of these patients.

On October 26, 2022, our board of directors approved a reverse stock split of our outstanding shares of common stock at a ratio of one-for-15 (1:15). 

The reverse stock split became effective on October 27, 2022. The reverse stock split was approved by our stockholders at our Annual Meeting of 
Stockholders on June 7, 2022. All share and per share amounts of the common stock included in this Annual Report on Form 10-K, including in the 
accompanying consolidated financial statements, have been retrospectively adjusted to give effect to the reverse stock split for all periods presented, 
including reclassifying an amount equal to the reduction in par value to additional paid-in capital.

On December 2, 2022, we completed our acquisition of AavantiBio, Inc., or AavantiBio, a privately held gene therapy company focused on 
transforming the lives of patients with FA and rare cardiomyopathies, or the Acquisition. Upon the consummation of the Acquisition, we acquired 
AavantiBio’s gene therapy programs, AVB-202-TT and AVB-401, additional assets for the treatment of undisclosed cardiac diseases, platform technologies 
and know-how related thereto.

Our Pipeline 

We are focused on developing transformative treatments to improve the lives of patients with rare neuromuscular and cardiac diseases. Our current 

programs are all designed for treating these diseases with gene transfer products. Gene transfer, a type of gene therapy, is designed to address diseases 
caused by mutated genes through the delivery of functional versions of those genes, called transgenes. The transgenes are then utilized by the body to 
produce proteins that are absent or not functional prior to treatment, potentially offering long-lasting clinical benefit. In addition to a transgene, our gene 
transfer candidates include a viral capsid (a protein shell utilized as a vehicle to deliver a transgene to cells in the body) and a promoter (a specialized DNA 
sequence that directs cells to produce the protein in specific tissues). The vector is modified to no longer self-replicate yet still retain its ability to introduce 
new genetic material directly into patients’ cells. Adeno-associated virus, or AAV, vectors have been approved for use to deliver transgenes to patients, 
including via systemic delivery. The use of AAV vectors to deliver gene therapies has also been extensively studied by third parties in human clinical trials 
for multiple disease indications, and in certain of these trials AAV was delivered systemically to the patient.

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Neuromuscular Pipeline

About Duchenne muscular dystrophy 

Duchenne is a genetic muscle-wasting disease predominantly affecting boys, with symptoms that usually manifest between three and five years of 
age. Duchenne is a progressive, irreversible, and ultimately fatal disease that affects approximately one in every 3,500 to 5,000 live male births and has an 
estimated prevalence of 5,000 to 15,000 cases in the United States alone. Duchenne is caused by mutations in the dystrophin gene, which results in the 
absence or near-absence of dystrophin protein. Dystrophin protein works to strengthen muscle fibers and protect them from daily wear and tear. Dystrophin 
protein also serves as the cornerstone of the dystrophin glycoprotein complex, or DGC, a group of proteins that links the inner and outer components of 
muscle cells to ensure proper muscle function. Without functioning dystrophin and DGC, muscles suffer excessive damage from normal daily activities and 
are unable to regenerate, leading to the build-up of fibrotic, or scar, and fat tissue. More than 1,000 dystrophin gene mutations, which can be inherited or 
can occur spontaneously, have been identified in people with Duchenne. By their early teens, Duchenne patients typically lose their ability to walk and 
become dependent on a wheelchair for mobility. By their 20s, patients essentially become paralyzed from the neck down and require a ventilator to breathe. 
Though disease severity and life expectancy vary, a patient’s quality of life dramatically decreases over time, with death typically occurring by early 
adulthood from either cardiac or respiratory complications. 

There is no cure for Duchenne, and for the vast majority of patients, there are no satisfactory symptomatic or disease-modifying treatments. 
Glucocorticoid treatment, the current standard-of-care, has been shown to temporarily improve muscle strength, prolong the period of ambulation and slow 
the progression of Duchenne. However, glucocorticoid use is associated with well-known adverse side effects, including: severe weight gain, stunted 
growth, weakening of bone structure and metabolic dysfunctions, among others. The most commonly used glucocorticoids include prednisone and 
deflazacort (EMFLAZA).

In recent years, certain regulators have conditionally approved therapies which target specific mutations in the dystrophin gene. These therapies are 

indicated for only a small portion of the Duchenne patient population, and their respective efficacy profiles still need to be fully understood. 

Despite recent therapeutic advances, Duchenne represents a significant societal and economic burden. The economic burden, estimated at $1.2 

billion annually in the United States (excluding costly mortality and end-of-life care expenses), includes costs associated with hospital admissions, 
medication, frequent doctor visits and investment in assistive devices, as well as indirect costs related to productivity losses for the caregivers and costs due 
to pain, anxiety and social handicap. Of this amount, approximately 45% is represented by indirect costs. Only a small proportion of Duchenne patients are 
employed and many caregivers reduce their hours or stop working altogether to care for their children, who progressively require more help with everyday 
tasks, such as eating, dressing and using the bathroom. In some cases, patients also experience serious mental health issues that require additional support 
and treatment. 

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We are actively involved in engaging with the Duchenne patient, clinical and research communities to support advancement of therapies for patients 
with Duchenne. In November 2021, in collaboration with REGENXBIO Inc., we formally launched the Pathway Development Consortium, or the PDC, a 
multistakeholder initiative which aims to identify, develop, expand and maintain pathways to effective therapies for patients diagnosed early in life with 
rare diseases, including Duchenne. The PDC seeks to achieve these goals by bringing together a broad and diverse group of stakeholders from the rare 
disease and AAV gene therapy communities, including patients, industry, regulators, academia and payers, among others, for meaningful scientific and 
policy discussions. 

SGT-003 and SGT-001

Our efforts have historically been focused on our two Duchenne gene transfer candidates, SGT-003 and SGT-001, which are designed to address the 

underlying genetic cause of Duchenne by delivering a synthetic transgene that produces dystrophin-like protein that is only expressed in muscles of the 
body, including skeletal, cardiac and respiratory muscles. Our Duchenne candidate vectors are derived from a naturally occurring, non-pathogenic virus 
called AAV, which was selected for its ability to efficiently enter skeletal, diaphragm and cardiac muscle tissues. The vectors are designed to carry a 
synthetic dystrophin transgene construct, called microdystrophin, that retains the most critical components of the full-size dystrophin gene yet is small 
enough to fit within AAV packaging constraints and a muscle specific promoter.

Our microdystrophin is based on three decades of development and optimization work at the University of Missouri and the University of 

Washington as well as other academic institutions. In preclinical studies, the laboratories of Jeffrey Chamberlain, Ph.D., from the University of 
Washington, and Dongsheng Duan, Ph.D., from the University of Missouri, identified a proprietary configuration of genetic components that, when 
administered systemically, produces functional microdystrophin protein expression that not only stabilizes muscle membranes and protects muscle against 
injury, but also simultaneously restores the localization of DGC to the muscle membrane, notably increasing neuronal Nitric Oxide Synthase, or nNOS, 
concentration. In subsequent published studies, Drs. Duan and Chamberlain demonstrated in animal models that, in comparison to earlier configurations, 
nNOS-restoring microdystrophins were more effective in improving muscle function and resistance to fatigue. 

We believe the unique functionality of our proprietary microdystrophin may result in functional benefits including diminished muscle fatigue and 

protection against ischemic muscle damage, which can lead to loss of functional muscle. 

The expression of our microdystrophin is regulated by a modified, synthetic muscle-specific promoter cassette called CK8, which is derived from 

the naturally occurring muscle creatine kinase promoter. Regulatory cassettes, such as CK8, are used to prompt gene expression specifically in muscle 
tissues. In comparison to other regulatory cassettes, we chose CK8 due to its small size and its ability to drive microdystrophin transgene expression in 
skeletal, diaphragm and cardiac muscle tissues. In our preclinical studies in small and large animal models, CK8 restricted microdystrophin transgene 
expression to these muscles. 

In contrast to some other therapeutic approaches, our Duchenne candidates are agnostic to specific mutations in the dystrophin gene.

SGT-003 

SGT-003, our next-generation Duchenne gene transfer candidate program, is a preclinical candidate designed to preserve muscle function in 
Duchenne patients after a single administration and is based on some of the most recent understanding of dystrophin biology in the field. SGT-003 utilizes 
an updated construct, including our microdystrophin with AAV-SLB101, a novel, rationally designed capsid derived from AAV9 and developed for 
enhanced muscle tropism and reduced liver uptake, to more selectively deliver the drug to target tissue. We believe the SGT-003 construct is differentiated 
from other gene transfer candidates and may provide unique clinical benefit. 

Following in vitro studies in mouse and human muscle cells, AAV-SLB101 was evaluated in a head-to-head study against AAV9 with the CK8-
microdystrophin construct in the dystrophin-negative mouse model of Duchenne (mdx mouse). Separate groups of animals were administered a single 
intravenous dose of either construct and the biodistribution, microdystrophin protein expression, and biomarker analyses were performed at the conclusion 
of the study. Overall, the in vivo study data supported the results seen from in vitro assays and further demonstrated the potential benefits of SGT-003. The 
mdx mice dosed with the novel capsid showed increased biodistribution (vector genome copies) in representative muscle tissues and increased 
microdystrophin expression compared to those administered the AAV9 vector. In addition, there were lower vector genome copies in the liver compared to 
AAV9-administered animals, with the data supporting a preferential distribution of the novel capsid towards muscle tissue and away from the liver. These 
data supported the proof of concept for the novel capsid microdystrophin construct in Duchenne and formed a basis for establishing and advancing the 
SGT-003 program. 

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In April 2022, we released additional preclinical data from reporter transgene studies in non-human primates, or NHP, and both mdx and wild type 
mice suggesting that AAV-SLB101 may have meaningful advantages for the delivery of muscle-related gene therapies. Data from the NHP study using a 
reporter transgene in AAV-SLB101 demonstrated increased muscle tropism, decreased liver biodistribution and improved efficiency compared with AAV9. 
The results from the NHP study are consistent with the data from the reporter transgene studies in both mdx and wild type mouse models, which suggested 
improved muscle tropism and reduced liver uptake.  

In September 2022, we announced that we made the strategic decision to prioritize SGT-003 based on its potential clinical attributes and 

manufacturing process. We also released additional SGT-003 non-clinical data which reinforced previous comparative analyses that demonstrated increased 
microdystrophin expression using the novel muscle-tropic capsid AAV-SLB101 compared to AAV9. In an in vivo mdx mouse study, muscle tissues 
collected 28 days post-dosing from mice treated with SGT-003 manufactured using a transient-transfection based process showed approximately 2.3-fold 
higher levels of microdystrophin protein, as measured by western blot, compared to mice treated at equivalent doses with SGT-001 manufactured using an 
HSV based process. We believe these data continue to suggest that the AAV-SLB101 capsid, which is used in SGT-003, may be a superior candidate for 
muscle-targeted gene therapies, with the potential of achieving higher levels of microdystrophin expression with lower total doses, and support the 
advancement of the development of SGT-003 for the treatment of Duchenne. 

Development activities for SGT-003 are ongoing and we anticipate submitting an IND for SGT-003 in the second half of 2023 and, subject to IND 

clearance, initiating patient dosing in late-2023. 

SGT-001

SGT-001 was our first-generation gene therapy candidate for the treatment of Duchenne, and utilized an AAV9 vector with our proprietary nNOS 
containing microdystrophin. In April 2022, we announced that we completed enrollment in the IGNITE DMD Phase I/II dose-ascending clinical trial, a 
first in human study evaluating SGT-001, after the treatment of nine Duchenne patients across two dose cohorts. Other than the required ongoing 
observation of patients in IGNITE DMD and the completion of already in process preclinical experiments, the SGT-001 program has concluded.

One-year post treatment data relating to safety, efficacy and microdystrophin expression in muscle biopsies for patients enrolled in IGNITE DMD 

was released at the Muscular Dystrophy Association Clinical and Scientific Conference on March 19, 2023. Per regulatory guidelines, the trial remains 
active to monitor patients for long-term follow up and we expect the next IGNITE DMD clinical update to be at its conclusion, following the 5-year post-
dosing visit for the last patient enrolled. As previously disclosed, our primary efforts in Duchenne are currently focused on the ongoing development of 
SGT-003, our next-generation Duchenne candidate which utilizes an updated construct, including transgene and capsid, designed to increase expression in 
skeletal muscle while reducing the dose ultimately delivered to the liver.

About Friedreich’s Ataxia 

FA is a rare, inherited, multisystem, genetic disease caused by loss of functional frataxin protein, or FXN. One in every approximately 40,000 to 

50,000 people suffer from FA, with a carrier rate between 1:60 and 1:100, making FA the most common hereditary ataxia. The average age of diagnosis is 
in the early teens, which leads to many undiagnosed patients. Males and females are equally affected by FA. Approximately 9,000 patients in the United 
States and approximately 26,000 patients in the European Union are affected by FA. 

4

 
 
 
FA is a multisystem disease having both neurological and cardiac manifestations. FA affects the nerves and spinal cord, causing loss of control of 

body movements (ataxia). The most common manifestations of FA are progressive neurological symptoms, including loss of balance and coordination, loss 
of sensation in the arms and legs and loss of vision and hearing. A person with FA will usually need a wheelchair within ten to twenty years of symptom 
onset, may be completely incapacitated in later stages of the disease and may have a shortened life span. Mortality in FA is most commonly due to cardiac 
complications as 59% of FA deaths are from cardiac dysfunction. Only symptomatic treatment options are available, with none addressing the underlying 
cause of the disease, the defective frataxin gene. Thus, there is a substantial unmet need with no approved therapies and no disease-modifying standard of 
care for the broad population of those impacted by FA. 

The primary cause of FA is a triplet repeat mutation in the frataxin gene, which encodes for FXN, a mitochondrial iron-binding protein involved in 

iron homeostasis. FA is an autosomal recessive disorder caused by a defect in both copies of the frataxin gene, most commonly due to GAA repeat 
expansions. Normal frataxin has GAA repeat levels ranging from 1 to 43. Mutated frataxin genes have GAA repeat levels ranging from 44 to 1,700. An 
increased number of GAA repeats between exon 1 and 2 of the frataxin gene results in abnormally low levels of the frataxin protein and accumulation of 
intracellular iron. This excess of iron in the heart and brain cells of FA patients promotes the production of toxic reactive oxygen species and leads to 
mitochondrial damage. This damage ultimately leads to progressive nervous system degeneration, movement problems, and cardiac dysfunction. Disease 
severity is correlated with increasing GAA repeat number in the frataxin gene.

We believe that FA is a natural candidate for gene therapy treatments. Mutations in both copies of the frataxin gene are the cause of the disease. 
Onset and progression of the disease are directly related to the amount of FXN expressed in cells. Carriers of one normal and one mutated copy of the 
frataxin gene are clinically normal. All patients express some level of FXN, and thus will not mount an immune response to the therapeutic protein. Proof-
of-concept data in animal models suggests that gene therapy may be a viable treatment for FA. Thus, we believe that delivery of gene therapy to one or 
more impacted tissues may provide clinical benefit to patients.

AVB-202-TT

Our approach for the treatment of FA is to target both the neurological and cardiac impairments experienced by patients through dual-route 

administration (intravenous and intrathecal) of gene transfer therapy to more comprehensively target disease pathology. We have conducted extensive 
characterization of our initial gene transfer therapy candidate for FA, AVB-202, which was developed utilizing an HSV-based manufacturing process, 
designed with a transgene encoding full length FXN protein packaged into an AAV9 capsid and under control of a universal promoter intended to drive 
expression of FXN in target tissues of disease, especially those of the central nervous system and heart. Preclinical data from mouse and NHP studies 
conducted with AVB-202 produced by an HSV manufacturing process supported preclinical proof of concept, including enhanced survival and cardiac 
function in a cardiac-specific FXN knockout mouse, and an overall favorable safety profile at high FXN expression levels.

We believe that the AVB-202 construct design, along with the planned dual route of administration, supports further development of gene therapy 

for the treatment of FA. We have moved to a transient transfection manufacturing method for AVB-202, known as AVB-202-TT, the development of which 
is underway. We are currently working to determine the most appropriate development path for AVB-202-TT and plan to conduct preclinical studies with 
this candidate in 2023. 

Cardiac Pipeline

Genetic cardiac disease, or inherited cardiac conditions, is an umbrella terms to describe cardiac diseases caused by mutations in one or more genes. 
Cardiomyopathy is a disease of the heart muscle that impairs the ability of the heart to pump blood to the rest of the body, resulting in arrhythmias, backup 
of blood into the lungs and other parts of the body, and ultimately heart failure. Forms of cardiomyopathy include dilated, or DCM, hypertrophic, or HCM, 
and arrhythmogenic cardiomyopathy. DCM is characterized by left ventricular enlargement and systolic dysfunction leading to heart failure and/or 
arrhythmia with significantly heightened risk of sudden cardiac death. DCM is the most common indication for heart transplant and the third most common 
cause of heart failure, with an annual incidence rate of sudden cardiac death of between 2% to 4%. Approximately 20% to 37% of DCM is estimated to be 
based on genetic causes. Individual patient prognosis varies, but patients with certain mutation profiles often present with arrhythmia and/or heart failure by 
approximately age 40 and have an overall severe risk of adverse cardiac events. There is a significant unmet need for gene therapy in DCM given a lack of 
available disease-modifying therapies and a high morbidity/mortality with burdensome standard-of-care for these patients.

5

 
About BAG3-mediated DCM 

Our lead cardiac program is directed to BAG3-mediated dilated cardiomyopathy. BAG3-mediated DCM is a rare cardiac disease and is 
characterized by mutations in the BAG3 gene. The BAG3 gene codes for the BCL-2-associated athanogene 3, or BAG3, protein. Sufficient levels of 
functional BAG3 are required for healthy cardiac function. BAG3 gene mutations lead to reduced BAG3 protein levels and ultimately DCM. Deletions and 
truncations in the BAG3 protein that result in haplo-insufficiency have been associated with the development of dilated cardiomyopathy resulting from 
myofilament damage, poor contraction, left ventricular dysfunction, dilatation and heart failure. Mechanistically, these physiologic impairments are caused 
from decreased BAG3 protein levels leading to heat shock protein dysfunction and a subsequent build-up of mis-folded, dysfunctional proteins in the 
sarcomere, which results in poor sarcomere integrity, increased mechanical stress, inflammation, remodeling and fibrosis. BAG3-mediated DCM accounts 
for approximately 3-4% of all diagnosed cases of DCM, representing a prevalent population of about 29,000 patients in the United States. The most 
common presentation of BAG3-mediated DCM is dyspnea but can range from leg swelling and fatigue to more severe complications including 
thromboembolic events, arrhythmias or even sudden cardiac death. Thus, activities of daily life are severely impacted in patients with BAG3-mediated 
DCM. Once patients are symptomatic, mortality is approximately 25% at one year and approximately 50% at five years. The penetrance of DCM in 
patients with BAG3 haploinsufficiency is 80% by age 40. There are no approved therapies to address the underlying cause of the disease and the current 
standard of care relies on symptomatic treatment depending on disease severity/progression. Treating the underlying cause of BAG3-mediated DCM 
requires expression of functional BAG3 within the heart muscle only. 

AVB-401 

We are currently developing a preclinical stage candidate, AVB-401, for the treatment of BAG3-mediated DCM utilizing the AAVrh74 capsid and a 

muscle-specific promoter. Preclinical data in wild type mice indicate that the AAVrh74 capsid and muscle-specific promoter combination show enhanced 
cardiac biodistribution and expression and decreased liver expression relative to an AAV9 capsid and constitutive promoter combination at doses of 5E13 
vg/kg or less. Thus, we believe that AVB-401 has the potential to allow for a more targeted, lower dose systemic AAV therapeutic. 

Other Cardiac Programs

We also have two pipeline programs, AVB-501 for DCM and AVB-601 for HCM, that are both in preclinical development to treat undisclosed 

cardiac indications.

Platform technologies

In addition to our gene transfer candidates, we have development programs focusing on platform technologies, including novel capsid libraries and 

dual gene expression, a technology that allows us to package multiple transgenes into one vector. These programs are part of our ongoing research efforts to 
develop innovative technologies that we believe may hold potential to translate into meaningful treatments, and drive future pipeline expansion, which we 
may seek to out-license to or develop through partnerships and collaborations with other biotechnology companies.

Novel Capsid Programs

Our novel capsid programs are directed toward developing skeletal and cardiac capsid libraries using two strategies designed to enhance skeletal and 

cardiac muscle tropism. Preclinical data in both wild-type and disease animal models demonstrated that we have developed a library of novel capsids that 
have shown increased muscle tropism with concomitant decreased liver biodistribution, resulting in improved efficiency compared to AAV9.  

We have developed a rationally designed library of novel AAV capsids with the goal of improving skeletal muscle tropism. We approached this 

through the insertion of unique peptide sequences into traditional capsids and initially evaluated these candidates through an in vitro screening platform. 
The primary goal of developing this library was to generate capsids that preferentially target and transduce skeletal muscle cells, compared to traditional 
capsids such as AAV9. Candidate novel capsids were packaged with our microdystrophin transgene under the control of a muscle-specific promoter, such 
as CK8, and used to transduce muscle cells. Evaluation of microdystrophin expression from in vitro studies performed in mouse muscle cell lines showed 
multiple-fold increases in numerous novel capsid candidates over AAV9. Further in vitro characterization of these capsids was performed in human 
Duchenne muscle cell lines. Results from these studies showed similar findings of multiple-fold increases in expression for novel capsid candidates over 
AAV9.

Non-specific novel capsids were packaged comprised of a bioluminescent protein (luciferase) under the control of a ubiquitous promoter (CMV) in 

order to allow expression across a wide range of tissue types. These constructs were further evaluated in vivo in both mdx and wild-type mice to 
understand the potential broader applicability of these capsids for other indications. Results from this study supports preferential targeting of muscle, with 
increases in biodistribution and expression over AAV9 across muscle tissues and decreased biodistribution and expression compared to AAV9 in the liver, 
and the potential applicability to a wide variety of indications that may benefit from such a targeting profile, in addition to Duchenne.

6

 
AAV-SLB101, the novel rationally designed capsid being used in our SGT-003 program, was screened in our internal development platform for 
enhanced muscle tropic capsids. We believe that the properties of this novel capsid may allow for enhanced benefit over therapies using traditional capsids, 
both in terms of efficacy and safety. We are continuing to further develop this rationally designed novel capsid library. Using both directed evolution and 
rational design, we are also developing a library of novel AAV capsids with the goal of enhancing cardiac tissue tropism and avoiding liver transduction. 

We are using non-human primates, pigs, and mice as selection models to screen libraries at the level of RNA expression. Selection for effective 
transduction in cardiac tissue across different mammalian species is intended to identify capsid variants that potentially utilize conserved transduction 
mechanisms and may therefore be more likely to exhibit efficacy in humans.

Manufacturing and Supply

Currently, we are working to develop and optimize a transient transfection manufacturing process for producing drug product for our current and 

future programs, including SGT-003, AVB-202-TT and AVB-401. This process will build on industry wide accepted practices and is expected to increase 
the yield, robustness and scalability of our current methods. 

SGT-003 is manufactured using transient transfection. We selected a manufacturing process that we believe will be scalable to support clinical and 
commercial production needs for SGT-003. The transient transfection process was selected in order to efficiently advance SGT-003 along its development 
timeline. In October 2021, we announced a partnership with a cell and gene therapy-focused CDMO, for the development and clinical stage manufacture of 
SGT-003.

We plan to manufacture AVB-202-TT and AVB-401 using transient transfection.

Intellectual property 

Our commercial success depends in part on our ability to obtain and maintain proprietary or intellectual property protection for our pipeline 
programs, our platform technologies and other know-how, to operate without infringing, misappropriating or otherwise violating the intellectual property 
rights of others, and to prevent others from infringing, misappropriating or otherwise violating our intellectual property rights. We also rely on patents, 
trade secrets, know-how, confidentiality procedures and agreements, and continuing technological innovation to develop and maintain our proprietary and 
intellectual property position.

We own and in-license various patents, patent applications, know-how and trade secrets relating to the development and commercialization of our 

gene therapy candidates and platform technologies. As of February 2023, our patent portfolio includes both owned and in-licensed patent families relating 
to our gene therapy programs and platform technologies.

Duchenne 

Exclusive of our platform technologies, our Duchenne program includes three patent families with respect to microdystrophin and promoter 
sequences. We have filed one pending PCT international patent application, and have also exclusively licensed two issued U.S. patents, two pending U.S. 
non-provisional patent applications, and eleven granted patents and ten pending patent applications in foreign jurisdictions. The issued U.S. patents are 
projected to expire between 2028 and 2036, excluding any patent term adjustments and any patent term extensions, and any U.S. patents that may issue 
from the pending U.S. non-provisional patent applications currently pending or that would be filed based on the PCT application would be projected to 
expire between 2036 and 2042, excluding any patent term adjustments and any patent term extensions. 

FA

Exclusive of our platform technologies, our FA program includes two patent families with respect to frataxin. We co-own one pending PCT 
international patent application, and have also exclusively licensed two issued U.S. patents, one pending U.S. non-provisional patent application and one 
pending patent application in a foreign jurisdiction. The issued U.S. patents are projected to expire in 2036, excluding any patent term adjustments and any 
patent term extensions, and any U.S. patents that may issue from the pending U.S. non-provisional patent application currently pending or that would be 
filed based on the PCT application would be projected to expire in 2042, excluding any patent term adjustments and any patent term extensions. 

Cardiac indications

Exclusive of our platform technologies, our cardiac programs include three patent families. We have filed one pending PCT international patent 

application and co-own two pending PCT international patent applications. Any U.S. patents that may issue that would be filed based on the PCT 
application would be projected to expire in 2042, excluding any patent term adjustments and any patent term extensions.

7

 
Platform technologies

We own or license patents, patent applications and know-how related to various platform technologies. Certain of these technologies may be 

applicable to one or more of our current or future gene therapy candidates.

Capsid technologies

Our capsid program includes one patent family related to modified AAV capsids. We have filed one pending U.S. patent application and nine 

pending patent applications in foreign jurisdictions. Any U.S. patents that may issue from the pending U.S. non-provisional patent application would be 
projected to expire in 2040, excluding any patent term adjustments and any patent term extensions.

Multi-packaging technologies

Our multi-packaging platform includes three patent families. We have filed two pending U.S. patent applications and fourteen pending patent 
applications in foreign jurisdictions and exclusively licensed two granted U.S. patents and one pending U.S. non-provisional patent application. The issued 
U.S. patents are projected to expire in 2035, excluding any patent term adjustments and any patent term extensions, and any U.S. patents that may issue 
from the pending U.S. non-provisional patent applications would be projected to expire between 2035 and 2041, excluding any patent term adjustments and 
any patent term extensions. 

Immune modulation and dosing technologies

Our immune modulation and dosing platform includes two patent families. We have exclusively licensed two U.S. non-provisional patent 

applications and one foreign patent applications. any U.S. patents that may issue from the pending U.S. non-provisional patent applications would be 
projected to expire between 2035 and 2040 excluding any patent term adjustments and any patent term extensions.

Substantive prosecution of our patent applications has not yet commenced at the U.S. Patent and Trademark Office, or USPTO. We cannot predict 
whether such pending patent applications will result in the issuance of patents that effectively protect our candidates and our platform technologies, or if 
such issued patents or any of our licensor’s issued patents will effectively prevent others from commercializing competitive products. In any event, patent 
prosecution is a lengthy process, during which the scope of the claims initially submitted for examination by the patent offices in various jurisdictions are 
often significantly narrowed by the time they issue, if they issue at all.

The term of individual patents depends upon the legal term for patents in the countries in which they are obtained. In most countries, including the 
United States, the patent term is 20 years from the earliest filing date of a non-provisional patent application. In the United States, a patent’s term may be 
lengthened by patent term adjustment, which compensates a patentee for administrative delays by the USPTO in examining and granting a patent, or may 
be shortened if a patent is terminally disclaimed over an earlier filed patent. The term of a patent that covers a drug or biological product may also be 
eligible for patent term extension when FDA approval is granted, subject to certain limitations and provided statutory and regulatory requirements are met 
(for more information, please see “Business— Government regulation and product approval —U.S. patent term restoration and marketing exclusivity”). In 
the future, if and when our candidates receive approval from the FDA or foreign regulatory authorities, we expect to apply for patent term extensions on 
issued patents we may obtain in the future covering those products, depending upon the length of the clinical trials for each product and other factors. There 
can be no assurance that any of our pending patent applications will issue or that we will benefit from any patent term extension or favorable adjustment to 
the term of any of our patents. 

As with other biotechnology and pharmaceutical companies, our ability to maintain and solidify our proprietary and intellectual property position for 

our candidates will depend on our success in obtaining effective patent claims and enforcing those claims if granted. However, our owned and licensed 
pending patent applications, and any patent applications that we may in the future file or license from third parties may not result in the issuance of patents. 
We also cannot predict the breadth of claims that may be allowed or enforced in our patents. Any issued patents that we may receive in the future may be 
challenged, invalidated or circumvented. In addition, because of the extensive time required for clinical development and regulatory review of a candidate 
we may develop, it is possible that, before any of our candidates can be commercialized, any related patent may expire or remain in force for only a short 
period following commercialization, thereby limiting protection such patent would afford the respective product and any competitive advantage such patent 
may provide. 

8

 
In addition to patents, we rely upon unpatented trade secrets and know-how and continuing technological innovation to develop and maintain our 

competitive position. We seek to protect our proprietary information, in part, by executing confidentiality agreements with our collaborators and scientific 
advisors, and non-competition, non-solicitation, confidentiality, and invention assignment agreements with our employees and consultants. We have also 
executed agreements requiring assignment of inventions with selected scientific advisors and collaborators. The confidentiality agreements we enter into 
are designed to protect our proprietary information and the agreements or clauses requiring assignment of inventions to us are designed to grant us 
ownership of technologies that are developed through our relationship with the respective counterparty. We cannot guarantee, however, that these 
agreements will afford us adequate protection of our intellectual property and proprietary information rights. 

We also seek trademark protection in the United States and internationally where available and when appropriate. We currently own U.S. federal 

registrations for the marks SOLID, SOLID BIOSCIENCES and SOLID BIOSCIENCES logo, as well as registrations in the European Union, United 
Kingdom, Japan, and Hong Kong for the mark SOLID BIOSCIENCES, registrations in the European Union and United Kingdom for the marks SOLID 
BIOSCIENCES logo and SOLID GT. We also own pending trademark applications in the U.S. and in foreign jurisdictions for the mark AAVANTIBIO and 
a pending trademark application in the U.S. for the mark AAVANTIBIO logo. 

Strategic partnerships and collaborations/licenses 

We have certain obligations under licensing agreements with third parties that include annual maintenance fees and payments that are contingent upon 
achieving various development, commercial and regulatory milestones. Pursuant to many of these license agreements, we are required to make milestone 
payments if certain development, regulatory and commercial sales milestones are achieved, and may have certain additional research funding obligations. 
Also, pursuant to the terms of many of these license agreements, when and if commercial sales of a licensed product commence, we must pay royalties to 
our licensors on net sales of the respective licensed products. 

University of Washington License Agreement 

In 2015, we entered into a license agreement with the University of Washington, acting through UW CoMotion, under which we obtained an 

exclusive, royalty-bearing, sublicensable, worldwide license under certain patent applications owned by the University of Washington relating to novel 
micro-dystrophins to develop, manufacture, and commercialize products for use in the treatment of Duchenne and related disease indications caused by a 
lack of functional dystrophin. We have the right to grant sublicenses to third parties contingent upon written approval by the University of Washington prior 
to executing such sublicense, which approval may not be unreasonably withheld. 

In consideration for the rights granted by the agreement, we paid a one-time, non-refundable license fee, which was recorded as a research and 

development expense in 2015. We are required to reimburse the University of Washington for costs incurred in applying for, prosecuting and maintaining 
patents and pay up to an aggregate of approximately $1 million upon the achievement of certain milestones. There were no milestones achieved during the 
years ended December 31, 2022, 2020, and 2019. In October 2017, the first milestone was achieved under this agreement. The milestone payment was 
recorded as a research and development expense in the fourth quarter of 2017. In October 2020, the license agreement was amended such that we were 
required to pay the University of Washington $375 thousand in connection with the execution of the collaboration and license agreement with Ultragenyx, 
or the Collaboration Agreement, in October 2020. This payment was recorded as a research and development expense in the fourth quarter of 2020. The 
license agreement was also amended such that we are required to pay an aggregate of approximately $3.4 million upon the achievement of certain 
milestones. We must also pay royalties of a low single digit percentage of future sales by us and our sublicensees of products developed under the licensed 
patent rights. In addition, we must pay an annual maintenance fee until certain milestones are achieved, at which time a minimum annual royalty 
requirement will replace such maintenance fee and will apply to us and our sublicensees.

We are obligated to use our commercially reasonable efforts, consistent with sound and reasonable business practices and judgment, to 

commercialize the inventions covered by the licensed patent rights and to make and sell products based on that patent as soon as practicable and maximize 
sales thereof. 

The University of Washington controls the prosecution and maintenance of the licensed patents in consultation with us and at our expense. In 
countries in which we have not requested prosecution or maintenance of licensed patents, the University of Washington may prosecute and maintain such 
licensed patents at its own cost. We have the first right to enforce such licensed patents at our expense. However, we may not enter into any settlement in 
any manner relating to the licensed patents without the University of Washington’s prior written consent. 

The license agreement remains in effect until the expiration of the last-to-expire patent licensed under the agreement. We may terminate the 

agreement at any time upon providing sixty days’ written notice to the University of Washington. The 

9

 
University of Washington may terminate the agreement upon our uncured, material breach of the agreement or if we enter into an insolvency-related event. 

The University of Missouri License Agreement 

In 2015, we entered into a license agreement with the Curators of the University of Missouri, or the University of Missouri, a public corporation of 
Missouri, under which we obtained an exclusive, royalty-bearing, sublicensable, worldwide license under certain patents and patent applications owned by 
the University of Missouri relating to a novel synthetic microdystrophin gene to make, sell and distribute products for use in the treatment of Duchenne and 
related disease indications resulting from a lack of functional dystrophin. 

In consideration for the rights granted by the agreement, we paid a one-time, non-refundable license fee, which was recorded as a research and 
development expense in 2015. We were required to reimburse the University of Missouri for costs incurred in applying for, prosecuting and maintaining the 
licensed patents and pay up to an aggregate of approximately $1 million upon the achievement of certain milestones for each product developed based on 
the licensed patents. 

Under the agreement, in the event we grant a sublicense to another party, we are required to pay the University of Missouri a percentage of the 
consideration received. The license agreement was amended such that we were required to pay, and did pay, the University of Missouri $0.8 million in 
February 2021 and $1.3 million in February 2022 as a result of the execution of the Collaboration Agreement with Ultragenyx in October 2020. These 
amounts were recorded as a research and development expense in the fourth quarter of 2020. The license agreement was also amended such that we are 
required to make aggregate milestone payments of approximately $1.9 million upon the achievement of certain milestones.

There were no milestones achieved during the years ended December 31, 2022, 2021, and 2020. We must pay a royalty of a low single digit 
percentage of future sales or by its sublicensees of products developed using the licensed patents. In addition, we must pay an annual maintenance fee until 
certain milestones are achieved, after which time a minimum annual royalty will replace such maintenance fee.

Under the agreement, we granted the University of Missouri a non-exclusive, royalty-free, irrevocable, paid-up license, with the right to grant 
sublicenses to non-profit, academic, educational or governmental institutions, to practice and use improvements made by us using the licensed patent 
rights, solely for non-commercial research purposes. 

We are obligated to use our reasonable best efforts to introduce products based on the licensed patent rights into the commercial market as soon as 

possible, consistent with sound and reasonable business practices and judgment, and thereafter to keep such products reasonably available to the public. 

The University of Missouri controls the prosecution and maintenance of the licensed patents in consultation with us and at our expense. In countries 

in which we have not requested prosecution or maintenance of licensed patents, the University of Missouri may prosecute and maintain such licensed 
patents at its own cost. We have the first right to enforce such licensed patents at our expense. However, any settlement, consent judgment or other 
voluntary disposition of litigation that materially limits the scope, validity or enforceability of the licensed patent or admits fault or wrongdoing on the part 
of the University of Missouri must be pre-approved in writing by the University of Missouri. The license agreement remains in effect until the expiration of 
the last-to-expire patent or the abandonment of the last to be abandoned patent application licensed under the agreement. The University of Missouri may 
terminate the agreement, or render the license granted thereunder non-exclusive, in individual countries if we and our sublicensees fail to achieve certain 
milestones. We may terminate the license agreement at any time upon providing six months’ written notice to the University of Missouri and paying a 
termination fee. Each of the University of Missouri and we may also terminate the agreement for an uncured default or breach of the agreement by the 
other party. Our ability to cure such breach only applies to the first two notices of such breach provided by the University of Missouri, and thereafter, the 
University of Missouri may terminate the agreement for our default or breach of the agreement upon thirty days’ written notice without an opportunity to 
cure such default or breach. 

University of Florida License Agreement

In 2020, as amended, AavantiBio entered into license agreements with the University of Florida Research Foundation, Inc., or UFRF. Broadly, the 

agreements relate to FA. We acquired the agreements in connection with the Acquisition. Under each agreement we obtained an exclusive, royalty-bearing, 
sublicensable, world-wide license to certain patents and patent applications and a royalty-bearing non-exclusive license under the know-how, to make, have 
made, use, see, have sold, import and export licensed products. UFRF retains the right to practice the patent rights and know-how for internal non-
commercial research, including research sponsored by commercial entities, and educational purposes.

10

 
In consideration for the rights granted under each agreement, AavantiBio paid a one-time non-refundable license fee. In connection with each 
agreement, we are required to pay an annual license maintenance fee until the first commercial sale of a licensed product after which time a minimum 
annual royalty will replace such maintenance fees. Under each agreement, we are required to reimburse UFRF for costs incurred in applying for, 
prosecuting and maintaining patents, pay up to an aggregate of approximately $2.9 million upon the achievement of certain intellectual property, clinical 
and regulatory milestones for each licensed product under the agreement and pay a low, single digit royalty on annual net sales by us and our sublicensees 
of licensed products on a licensed-product-by-licensed product basis. For any licensed product covered by both of these agreements, we are only obligated 
to make one payment for each milestone achieved and royalty payment due. Prior to the Acquisition, AavantiBio paid a single milestone fee related to these
agreements in an amount of less than $0.1 million. Under each agreement, in the event we grant a sublicense to another party, we are required to pay UFRF 
a percentage of the consideration received.

Under each agreement, we have the right to grant sublicenses to third parties through multiple tiers, to the extent we are in compliance with our 

diligence obligations under the agreement and that sublicensee is subject to the terms of such agreement.

Under each agreement, we are obligated to use commercially reasonable efforts to develop and commercialize products covered by the licensed 

patent rights or know-how and to achieve certain regulatory and commercialization milestones within estimated time periods.

Under each agreement, UFRF controls the prosecution and maintenance of the licensed patents in consultation with us and at our expense. In 
countries in which we have not requested prosecution or maintenance of licensed patents in a particular country or jurisdiction, the license granted to such 
patent rights will terminate in such country or jurisdiction. We have the first right to enforce such licensed patents at our expense.

Each of the agreements terminates on a licensed product-by-licensed product basis on the later of: (i) expiration of the patent rights covering such 

licensed product or (ii) ten (10) years from the first commercial sale of such licensed product. After five years, we may terminate an agreement for any 
reason giving advance written notice and reason for termination.  UFRF may terminate an agreement for our uncured default or breach of the agreement. 
UFRF may immediately terminate an agreement if we bring or assist others in bringing a patent challenge against the licensed patent rights. If UFRF sends 
us a written demand to terminate a sublicense agreement due to such sublicensee bringing or assisting a patent challenge, UFRF may terminate such 
agreement if we do not terminate the license with such sublicensee.

Ultragenyx Collaboration Agreement

On October 22, 2020, or the Effective Date, we entered into a collaboration and license agreement with Ultragenyx, to focus on the development 
and commercialization of new gene therapies for Duchenne. We granted Ultragenyx an exclusive worldwide license for any pharmaceutical product that 
expresses our proprietary microdystrophin construct from AAV8 and variants thereof in clade E for the treatment of Duchenne and other diseases resulting 
from the lack of functional dystrophin. We retain exclusive rights to all other uses of our microdystrophin proteins, including under our SGT-003 and SGT-
001 programs.

We have conducted and may conduct in the future certain activities agreed to by the parties with respect to the development of licensed products. 

Ultragenyx is obligated to reimburse us for personnel and out-of-pocket costs that we incur in conducting such development activities. Otherwise, 
Ultragenyx has decision-making authority with respect to the development, manufacturing and commercialization of licensed products. In connection with 
the execution of the Collaboration Agreement, we also entered into a stock purchase agreement and an investor agreement with Ultragenyx, pursuant to 
which we issued and sold 521,719 shares of our common stock to Ultragenyx at a price of $76.669 per share for an aggregate purchase price of 
approximately $40.0 million. The shares purchased by Ultragenyx were subject to a lock-up period until the earliest to occur of (i) 18 months from the 
closing date, (ii) the termination of the Collaboration Agreement or (iii) other specified events. Pursuant to the terms of the investor agreement, Ultragenyx 
agreed that, so long as it holds at least 10% of our outstanding common stock, the shares will be subject to a voting agreement, such that until the earliest to 
occur of certain specified events, and subject to specified conditions, Ultragenyx will, and will cause its permitted transferees to, vote in accordance with 
the recommendation of our Board of Directors with respect to specified matters.

Ultragenyx also agreed to pay up to $255.0 million in cumulative milestone payments per product upon achievement of specified milestone events, 

and tiered royalties on worldwide net sales at low double digit to mid-teens percentages. Upon achievement of proof-of-concept, we have the right to opt-in 
to co-fund collaboration programs in return for participation in a profit share or increased royalty payments. None of the payments under the Collaboration 
Agreement are refundable.

For each licensed product for which Ultragenyx decides to initiate a registrational trial in humans, we have the option to fund 30% of the 

development costs in the United States and European Union for such licensed product and forgo the development milestones and regulatory milestones, or 
the Development Option, and receive tiered royalties on a licensed 

11

 
product-by-licensed product and country-by-country basis ranging from a mid-teens percentage to a low twenties percentage based on Ultragenyx’s, and 
any of its affiliates’ and sublicensees’ annual worldwide net sales of each such licensed product.

For each Licensed Product for which we exercise the Development Option, we may also elect to share 30% of the net income and net losses on net 
sales of such Licensed Product in the United States and European Union, or the Income Share Option. For licensed products for which we have exercised 
the Income Share Option, we will not be entitled to milestone payments and Ultragenyx will pay us tiered royalties on a licensed product-by-licensed 
product and country-by-country basis ranging from a mid-teens percentage to a low twenties percentage based on Ultragenyx’s, and any of its affiliates’ 
and sublicensees’, annual net sales of each such licensed product outside of the United States and European Union.

We and Ultragenyx established a Joint Steering Committee, or the JSC. The JSC will, among other responsibilities, review and oversee certain 
development activities performed under the Collaboration Agreement, including reviewing the development plan and budget for the development activities 
to be performed by us.

The term of the Collaboration Agreement began on the Effective Date and expires upon the expiration of all payment obligations from Ultragenyx to 

us under the Collaboration Agreement. Ultragenyx also has the ability to terminate for convenience with prior written notice to us, and either party may 
terminate for an uncured material breach.

As described in Note 3, the Company entered into the Collaboration Agreement with Ultragenyx for the research, development and 

commercialization of other pharmaceutical products that express the Company’s MD5 nNOS binding domain form of microdystrophin protein.  Ultragenyx 
is a related party since Ultragenyx is one of the Company’s significant stockholders. During the year ended December 31, 2022, the Company recognized 
revenue of $8.1 million associated with the Collaboration Agreement. As of December 31, 2022, there was $0 million of deferred revenue related to the 
Collaboration Agreement. There is $0 million due from Ultragenyx as of December 31, 2022.

Competition 

The biotechnology and pharmaceutical industries are characterized by rapidly changing technologies, significant competition and a strong emphasis 
on intellectual property. This is also true in treatments of neuromuscular diseases, such as Duchenne, cardiac diseases as well as in gene therapy. While we 
believe that our focus, strength of team, expertise in gene therapy, scientific knowledge and intellectual property provide us with competitive advantages, 
we face competition from several different sources, including large and small biopharmaceutical companies, academic research institutions, government 
agencies and public and private research institutions. Not only must we compete with other companies that are focused on gene transfer technology, but any 
product candidates that we successfully develop and commercialize will compete with existing therapies and new therapies that may become available in 
the future. 

Many of our competitors have significantly greater financial resources and expertise in research and development, manufacturing, preclinical 
testing, clinical trials, regulatory approvals and product marketing than we do. These competitors also compete with us in recruiting and retaining qualified 
scientific and management personnel and establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies 
complementary to, or necessary for, our programs. Mergers and acquisitions in the pharmaceutical and biotechnology industries may result in even more 
resources being concentrated among a smaller number of our competitors. Smaller or early-stage companies may also prove to be significant competitors, 
particularly through collaborative arrangements with large and established companies. 

We are aware of several companies and research institutions conducting clinical trials of product candidates focused on systemic gene transfer for 

Duchenne, including Pfizer Inc. and Sarepta Therapeutics, Inc. with product candidates currently in Phase III clinical development, Genethon with a 
product candidate currently in a Phase I/II/III clinical trial , and REGENXBIO Inc. which has announced that it initiated a Phase I/II clinical trial in the first 
quarter of 2023. In September 2022, Sarepta Therapeutics, Inc. announced that it had submitted a BLA for its gene therapy candidate SRP-9001 for the 
treatment of ambulant patients with Duchenne. In February 2023, Reata Pharmaceuticals announced FDA approval of SKYCLARYSTM (omaveloxolone) 
indicated the treatment of FA in adults and adolescents aged 16 years and older. We are also aware of several companies and research institutions 
conducting clinical trials of product candidates focused on systemic gene transfer for cardiomyopathy associated with FA, including Lexeo Therapeutics 
with a product candidate currently in a Phase I/II clinical trial and a Phase IA study sponsored by Weill Medical College of Cornell University.  

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Government regulation and product licensure 

U.S. government regulation and product licensure 

In the United States, biologic products including gene therapy products, such as our lead candidates, are licensed for marketing by the FDA under 
the Public Health Service Act, or PHS Act, and regulated by the FDA under the Federal Food, Drug, and Cosmetic Act, or FD&C Act, as well as by other 
federal, state and local statutes and regulations. Both the FD&C Act and the PHS Act and their corresponding rules and regulations govern, among other 
things, the testing, manufacturing, safety, efficacy, labeling, packaging, storage, record keeping, distribution, reporting, advertising and other promotional 
practices involving biologic products. FDA approval must be obtained before conducting human clinical testing of biologic products. FDA must license a 
biologic product before it may be marketed within the United States. 

U.S. biologic products development process 

A company, institution, or organization which takes responsibility for the initiation and management of a clinical development program for such 

products is referred to as a sponsor. A sponsor seeking approval to market and distribute a new biological product in the United States must typically secure 
the following: 

•

•

•

•

•

•

•

•

•

•

•

•

completion of preclinical laboratory tests and in vivo studies according to the FDA’s GLP requirements and applicable requirements for the 
humane use of laboratory animals or other applicable regulations; 

design of a clinical protocol and submission to the FDA of an application for an IND, which allows human clinical trials to begin unless the 
FDA objects within 30 days; 

approval by an institutional review board, or IRB, reviewing each clinical site before each clinical trial may be initiated; 

approval by an institutional biosafety committee, or IBC, assessing the safety of the clinical research and identifying any potential risk to 
public health or the environment; 

performance of adequate and well controlled human clinical trials according to the FDA’s regulations commonly referred to as good clinical 
practices, or GCPs, and any additional requirements for the protection of human research subjects and their health information, to establish the 
safety, potency and purity of the proposed biologic product for its intended use; 

preparation and submission to the FDA of a biologics license application, or BLA, for marketing approval that includes substantive evidence of 
safety, purity and potency from results of preclinical testing and clinical trials, and detailed information about the CMC for the product, reports 
of the outcomes and full data sets of the clinical trials and proposed labeling and packaging for the product; 

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

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

potential FDA audit of the nonclinical and clinical trial sites that generated the data in support of the BLA; 

payment of user fees; 

FDA review and licensure of the BLA; and 

compliance with any post-approval requirements, including the potential requirement to implement a Risk Evaluation and Mitigation Strategy, 
or REMS, and the potential requirement to conduct post-approval studies. 

Preclinical Studies and Investigational New Drug Application

Before testing any biologic product candidate in humans, including a gene therapy product candidate, the product candidate must undergo 

preclinical testing. Preclinical tests, also referred to as nonclinical studies, include laboratory evaluations of product chemistry, toxicity and formulation, as 
well as in vivo studies to assess the potential safety and activity of the product candidate and to establish a rationale for therapeutic use. These studies are 
generally referred to as IND-enabling studies. The conduct of certain nonclinical studies must comply with federal regulations and requirements, including 
GLPs and the U.S. Department of Agriculture’s Animal Welfare Act, if applicable. 

If a gene therapy trial is conducted at, or sponsored by, institutions receiving NIH funding for recombinant DNA research, prior to the submission of 

an IND to the FDA, a protocol and related documents must be submitted to, and the study registered with, the NIH Office of Biotechnology Activities, or 
OBA, pursuant to the NIH Guidelines for Research Involving 

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Recombinant DNA Molecules, or NIH Guidelines. Compliance with the NIH Guidelines is mandatory for investigators at institutions receiving NIH funds 
for research involving recombinant DNA. However, many companies and other institutions, not otherwise subject to the NIH Guidelines, voluntarily follow 
them. 

The clinical trial sponsor must submit the results of the preclinical tests, together with manufacturing information, analytical data, any available 
clinical data or literature and a proposed clinical protocol, to the FDA as part of the IND. An IND is an exemption from the FD&C Act that allows an 
unapproved product to be shipped in interstate commerce for use in an investigational clinical trial and a request for FDA authorization to administer an 
investigational product to humans. Some preclinical tests may continue even after the IND is submitted. The IND becomes effective 30 days after receipt 
by the FDA, unless the FDA notifies the sponsor of deficiencies that require correction before human studies can begin. The sponsor cannot initiate studies 
until the FDA notifies the sponsor that the submitted corrections are satisfactory. The FDA may also place the clinical trial on a full clinical hold or partial 
clinical hold. In such a case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. 

In addition, the FDA may impose a partial clinical hold at any time before or during clinical trials. A partial clinical hold is a delay or suspension of 
only part of the clinical work requested under the IND (e.g., a specific protocol or part of a protocol is not allowed to proceed; however, other protocols or 
parts of the protocol are allowed to proceed under the IND). If the FDA requires that progress to the next study is contingent on (i) FDA review of 
additional data and (ii) subsequent specific permission for the study to proceed, this represents a partial clinical hold. 

Human clinical trials under an IND 

Clinical trials involve the administration of the biologic product candidate to healthy volunteers or subjects under the supervision of qualified 

investigators, generally physicians not employed by, or under the control of, the trial sponsor. Clinical trials are conducted under written study 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, including stopping rules that assure a clinical trial will be stopped if certain adverse events should occur. Each protocol and any 
amendments to the protocol must be submitted to the FDA as part of the IND. Clinical trials must be conducted and monitored in accordance with the 
FDA’s regulations comprising the GCP requirements, including the requirement that all research subjects provide informed consent. 

Further, each clinical trial must be reviewed and approved by an IRB at or servicing each institution at which the clinical trial will be conducted. An 

IRB is charged with protecting the welfare and rights of trial participants and considers such items as whether the risks to individuals participating in the 
clinical trials are minimized and are reasonable in relation to anticipated benefits. The IRB also approves the form and content of the informed consent that 
must be signed by each clinical trial subject or his or her legal representative, reviews and approves the study protocol and must monitor the clinical trial 
until completed.

 Additionally, some trials are overseen by an independent group of qualified experts organized by the trial sponsor, known as a data safety 
monitoring board or committee, or DSMB. This group provides authorization as to whether or not a trial may move forward at designated check points 
based on access that only the group maintains to available data from the study. Clinical trials involving recombinant DNA also must be reviewed by an IBC 
a local institutional committee that reviews and oversees basic and clinical research and utilizes recombinant DNA at that institution. The IBC assesses the 
safety of the research and identifies any potential risk to public health or the environment. 

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

•

•

•

Phase I. The investigational biologic product is initially introduced into a small group of healthy human subjects and tested for safety, dosage 
tolerance, absorption, metabolism, distribution, excretion and, if possible, to gain an early understanding of its effectiveness. In the case of 
some product candidates for severe or life-threatening diseases, especially when the product candidate may be too inherently toxic to ethically 
administer to healthy volunteers, the initial human testing is often conducted in patients. Phase I clinical trials of gene therapies are typically 
conducted in patients rather than healthy volunteers. 

Phase II. The biologic product candidate is evaluated in a limited patient population to identify possible adverse effects and safety risks, to 
preliminarily evaluate the efficacy of the product for specific targeted diseases and to determine dosage tolerance, optimal dosage and dosing 
schedule. 

Phase III. Phase III clinical trials are commonly referred to as “pivotal” studies, which typically denotes a study that presents the data that the 
FDA or other relevant regulatory agency will use to determine whether or not to approve a biologic product. In Phase III clinical trials, the 
investigational biologic product is administered to an expanded patient population, generally at multiple geographically dispersed clinical trial 
sites in adequate and well controlled clinical trials to generate sufficient data to statistically confirm the potency and safety of the product for 

14

 
approval. These clinical trials are intended to establish the overall risk/benefit ratio of the product candidate and provide an adequate basis for 
product labeling. 

Post-approval clinical trials, sometimes referred to as Phase IV clinical trials, may be conducted after initial approval. These clinical trials are used 

to gain additional experience from the treatment of patients in the intended therapeutic indication, particularly for long-term safety follow-up. 

A clinical trial may combine the elements of more than one phase and the FDA often requires more than one Phase III trial to support marketing 

approval of a product candidate. A company’s designation of a clinical trial as being of a particular phase is not necessarily indicative that the study will be 
sufficient to satisfy the FDA requirements of that phase because this determination cannot be made until the protocol and data have been submitted to and 
reviewed by the FDA. Generally, pivotal trials are Phase III trials, but they may be Phase II trials if the design provides a well-controlled and reliable 
assessment of clinical benefit, particularly in an area of unmet medical need.

In December 2022, with the passage of Food and Drug Omnibus Reform Act, or FDORA, Congress required sponsors to develop and submit a 

diversity action plan for each Phase 3 clinical trial or any other “pivotal study” of a new biological product.  These plans are meant to encourage the 
enrollment of more diverse patient populations in late-stage clinical trials of FDA-regulated products.  Specifically, action plans must include the sponsor’s 
goals for enrollment, the underlying rationale for those goals, and an explanation of how the sponsor intends to meet them.  In addition to these 
requirements, the legislation directs the FDA to issue new guidance on diversity action plans.

During all phases of clinical development, regulatory agencies require extensive monitoring and auditing of all clinical activities, clinical data and 
clinical trial investigators. Annual progress reports detailing the results of the clinical trials must be submitted to the FDA. In addition, sponsors are given 
opportunities to meet with the FDA at certain points in the clinical development program, including prior to the submission of an IND (Pre-IND meeting), 
at the end of a Phase II clinical trial and before a BLA is submitted.

Written IND safety reports must be promptly submitted to the FDA, the IRB and the investigators for serious and unexpected adverse events, any 

findings from other trials, in vivo laboratory tests or in vitro testing that suggest a significant risk for human subjects, or any clinically important increase in 
the rate of a serious suspected adverse reaction over that listed in the protocol or investigator brochure. The sponsor must submit an IND safety report 
within 15 calendar days after the sponsor determines that the information qualifies for reporting. The sponsor also must notify the FDA of any unexpected 
fatal or life-threatening suspected adverse reaction within seven calendar days after the sponsor’s initial receipt of the information. 

The FDA or the sponsor or its DSMB may suspend a clinical trial at any time on various grounds, including a finding that the research subjects or 

patients are being exposed to an unacceptable health risk. Similarly, an IRB can suspend or terminate approval of a clinical trial at its institution if the 
clinical trial is not being conducted in accordance with the IRB’s requirements or if the biologic product candidate has been associated with unexpected 
serious harm to patients. 

Finally, sponsors of certain clinical trials are required to register and disclose certain clinical trial information on a public registry (clinicaltrials.gov) 

maintained by the NIH.  In particular, information related to the product, patient population, phase of investigation, study sites and investigators and other 
aspects of the clinical trial is made public as part of the registration of the clinical trial. The NIH’s Final Rule on registration and reporting requirements for 
clinical trials became effective in 2017. Although the FDA has historically not enforced these reporting requirements due to the Department of Health and 
Human Services’, or HHS’s, long delay in issuing final implementing regulations, the FDA has issued several Notices of Noncompliance to manufacturers 
since April 2021.

Expanded Access to an Investigational Drug for Treatment Use 

Expanded access, sometimes called “compassionate use,” is the use of investigational new drug products outside of clinical trials to treat patients 
with serious or immediately life-threatening diseases or conditions when there are no comparable or satisfactory alternative treatment options. The rules 
and regulations related to expanded access are intended to improve access to investigational drugs for patients who may benefit from investigational 
therapies. FDA regulations allow access to investigational drugs under an IND by the company or the treating physician for treatment purposes on a case-
by-case basis for: individual patients (single-patient IND applications for treatment in emergency settings and non-emergency settings); intermediate-size 
patient populations; and larger populations for use of the drug under a treatment protocol or Treatment IND Application. 

15

 
When considering an IND application for expanded access to an investigational product with the purpose of treating a patient or a group of patients, 

the sponsor and treating physicians or investigators will determine suitability when all of the following criteria apply: patient(s) have a serious or 
immediately life-threatening disease or condition, and there is no comparable or satisfactory alternative therapy to diagnose, monitor, or treat the disease or 
condition; the potential patient benefit justifies the potential risks of the treatment and the potential risks are not unreasonable in the context or condition to 
be treated; and the expanded use of the investigational drug for the requested treatment will not interfere with initiation, conduct, or completion of clinical 
investigations that could support marketing approval of the product or otherwise compromise the potential development of the product.

There is no obligation for a sponsor to make its investigational products available for expanded access; however, as required by the 21st Century 

Cures Act, or the Cures Act, passed in 2016, if a sponsor has a policy regarding how it responds to expanded access requests, it must make that policy 
publicly available. Sponsors are required to make such policies publicly available upon the earlier of initiation of a Phase II or Phase III study; or 15 days 
after the drug or biologic receives designation as a breakthrough therapy, fast track product, or regenerative medicine advanced therapy. 

In addition, on May 30, 2018, the Right to Try Act, was signed into law. The law, among other things, provides a federal framework for certain 
patients to access certain investigational new drug products that have completed a Phase I clinical trial and that are undergoing investigation for FDA 
approval. Under certain circumstances, eligible patients can seek treatment without enrolling in clinical trials and without obtaining FDA permission under 
the FDA expanded access program. There is no obligation for a drug manufacturer to make its drug products available to eligible patients as a result of the 
Right to Try Act, but the manufacturer must develop an internal policy and respond to patient requests according to that policy.

Special Regulations and Guidance Governing Gene Therapy Products

The FDA has defined a gene therapy product as one that mediates its effects by transcription and/or translation of transferred genetic material and/or 

by integrating into the host genome and which is administered as nucleic acids, viruses, or genetically engineered microorganisms. The products may be 
used to modify cells in vivo or transferred to cells ex vivo prior to administration to the recipient. Within the FDA, the Center for Biologics Evaluation and 
Research, or CBER, regulates gene therapy products. CBER’s Office of Therapeutic Products is responsible for the review of gene therapy and related 
products, and the FDA has established the Cellular, Tissue and Gene Therapies Advisory Committee to advise CBER on its reviews. The NIH also advises 
the FDA on gene therapy issues and other issues related to emerging technologies. The FDA and the NIH have published guidance documents with respect 
to the development and submission of gene therapy protocols.

The FDA has issued various guidance documents regarding gene therapies, including final guidance documents released in January 2020 relating to 
chemistry, manufacturing and controls information for gene therapy INDs, gene therapies for rare diseases and gene therapies for retinal disorders, as well 
as final guidance in October 2022 for Human Gene Therapy for Neurodegenerative Diseases. Although the FDA has indicated that these and other 
guidance documents it previously issued are not legally binding, we believe that our compliance with them is likely necessary to gain approval for any gene 
therapy product candidate we may develop. The guidance documents provide additional factors that the FDA will consider at each of the above stages of 
development and relate to, among other things, the proper preclinical assessment of gene therapies; the chemistry, manufacturing, and control information 
that should be included in an IND application; the proper design of tests to measure product potency in support of an IND or BLA application; and 
measures to observe delayed adverse effects in subjects who have been exposed to investigational gene therapies when the risk of such effects is high. For 
AAV vectors specifically, the FDA typically recommends that sponsors continue to monitor participants for potential gene therapy-related adverse events 
for up to a 5-year period. Other types of gene therapy or gene editing products may require longer follow up, potentially up to a maximum 15-year period.

Pediatric Studies

Under the Pediatric Research Equity Act of 2003, or PREA, a BLA or supplement thereto must contain data that are adequate to assess the safety 

and effectiveness of the product for the claimed indications in all relevant pediatric subpopulations, and to support dosing and administration for each 
pediatric subpopulation for which the product is safe and effective. Sponsors must also submit pediatric study plans prior to the assessment data. Those 
plans must contain an outline of the proposed pediatric study or studies the sponsor plans to conduct, including study objectives and design, any deferral or 
waiver requests, and other information required by regulation. The sponsor, the FDA, and the FDA’s internal review committee must then review the 
information submitted, consult with each other, and agree upon a final plan. The FDA or the sponsor may request an amendment to the plan at any time. 

For products intended to treat a serious or life-threatening disease or condition, the FDA must, upon the request of a sponsor, meet to discuss 

preparation of the initial pediatric study plan or to discuss deferral or waiver of pediatric assessments. In addition, the FDA will meet early in the 
development process to discuss pediatric study plans with sponsors 

16

 
and FDA must meet with sponsors by no later than the end-of-phase 1 meeting for serious or life-threatening diseases and by no later than 90 days after the 
FDA’s receipt of the study plan.

The FDA may, on its own initiative or at the request of the sponsor, grant deferrals for submission of some or all pediatric data until after approval 

of the product for use in adults, or full or partial waivers from the pediatric data requirements. The FDA is required to send a PREA Non-Compliance letter 
to sponsors who have failed to submit their pediatric assessments required under PREA, have failed to seek or obtain a deferral or deferral extension or 
have failed to request approval for a required pediatric formulation. It further requires the FDA to publicly post the PREA Non-Compliance letter and 
sponsor’s response.  Unless otherwise required by regulation, the pediatric data requirements do not apply to products with orphan designation, although 
FDA has recently taken steps to limit what it considers abuse of this statutory exemption. Additional requirements and procedures relating to deferral 
requests and requests for extension of deferrals are contained in the Food and Drug Administration Safety and Innovation Act, or FDASIA.  The FDA also 
maintains a list of diseases that are exempt from the requirements PREA, due to low prevalence of disease in the pediatric population.

Compliance with cGMP requirements 

Manufacturers of biologics must comply with applicable cGMP regulations, including quality control and quality assurance and maintenance of 

records and documentation. Manufacturers and others involved in the manufacture and distribution of such products also must register their establishments 
with the FDA and certain state agencies. Both domestic and foreign manufacturing establishments must register and provide additional information to the 
FDA upon their initial participation in the manufacturing process. Establishments may be subject to periodic, unannounced inspections by government 
authorities to ensure compliance with cGMP requirements and other laws. Discovery of problems may result in a government entity placing restrictions on 
a product, manufacturer or holder of an approved BLA, and may extend to requiring withdrawal of the product from the market. The FDA will not approve 
a BLA 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 specification. The PREVENT Pandemics Act, which was enacted in December 2022, clarifies that foreign drug 
manufacturing establishments are subject to registration and listing requirements even if a biologic undergoes further manufacture, preparation, 
propagation, compounding, or processing at a separate establishment outside the United States prior to being imported or offered for import into the United 
States.

Concurrent with clinical trials, companies usually complete additional preclinical studies and must also develop additional information about the 

physical characteristics of the biologic product candidate as well as finalize a process for manufacturing the product candidate in commercial quantities in 
accordance with cGMP requirements. To help reduce the risk of the introduction of adventitious agents or of causing other adverse events with the use of 
biologic products, the PHS Act emphasizes the importance of manufacturing control for products whose attributes cannot be precisely defined. The 
manufacturing process must be capable of consistently producing quality batches of the product candidate and, among other requirements, the sponsor must 
develop methods for testing the identity, strength, quality, potency and purity of the final biologic product. Additionally, appropriate packaging must be 
selected and tested, and stability studies must be conducted to demonstrate that the biologic product candidate does not undergo unacceptable deterioration 
over its shelf life. 

Submission and filing of a BLA 

After the completion of clinical trials of a biologic product, FDA licensure of a BLA must be obtained before commercial marketing of the biologic 

product. The BLA must include results of product development, laboratory and animal studies, human studies, information on the manufacture and 
composition of the product, proposed labeling and other relevant information. In addition, under the Pediatric Research Equity Act, a BLA or supplement 
to a BLA must contain data to assess the safety and effectiveness of the biologic product for the claimed indications in all relevant pediatric subpopulations 
and to support dosing and administration for each pediatric subpopulation for which the product is safe and effective. The FDA may grant deferrals for 
submission of data or full or partial waivers. 

Under the Prescription Drug User Fee Act, or PDUFA, as amended, each BLA must be accompanied by a significant user fee. Under federal law, the 
submission of most BLAs is subject to an application user fee, which for federal fiscal year 2023 is approximately $3.2 million for an application requiring 
clinical data. The sponsor of an approved BLA is also subject to an annual program fee, which for federal fiscal year 2023 is approximately $0.4 million. 
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 product candidates designated as orphan drugs, unless the product candidate also includes a non-orphan 
indication. 

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The FDA reviews a BLA within 60 days of submission to determine if it is substantially complete before the agency accepts it for filing, and it must 
so notify the sponsor of that determination within the 60 days. The FDA may refuse to file any BLA that it deems incomplete or not properly reviewable at 
the time of submission and may request additional information. In the event that FDA determines that an application does not satisfy this standard, it will 
issue a Refuse to File, or RTF, determination to the sponsor. The BLA may be resubmitted with the additional information. The resubmitted application 
also is subject to review before the FDA accepts it for filing. Once the submission is accepted for filing, the FDA begins an in-depth substantive review of 
the BLA. 

With filing of the application, the FDA reviews the BLA to determine, among other things, whether the proposed product is safe and potent, or 
effective, for its intended use, and has an acceptable purity profile, and whether the product is being manufactured in accordance with cGMP to assure and 
preserve the product’s identity, safety, strength, quality, potency and purity. The FDA may refer applications for novel biologic products or biologic 
products that 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. The FDA is not bound by the 
recommendations of an advisory committee, but it considers such recommendations carefully when making decisions. 

During the biologic product approval process, the FDA also will determine whether a REMS, is necessary to assure the safe use of the biologic 

product. REMS use risk minimization strategies beyond the professional labeling to ensure that the benefits of the product outweigh the potential risks. To 
determine whether a REMS is needed, the FDA will consider the size of the population likely to use the product, seriousness of the disease, expected 
benefit of the product, expected duration of treatment, seriousness of known or potential adverse events and whether the product is a new molecular entity. 
A REMS could include medication guides, physician communication plans and elements to assure safe use, such as restricted distribution methods, patient 
registries and other risk minimization tools. 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 a REMS, if required. 

In connection with its review of a BLA, the FDA will inspect the facilities at which the product candidate is manufactured. The FDA will not 
approve the product candidate unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate 
to assure consistent production of the product within required specifications. Additionally, before approving a BLA, the FDA will typically inspect one or 
more clinical sites to assure that the clinical trials were conducted in compliance with IND study requirements and GCP requirements to ensure the 
integrity of the clinical data. cGMP, GLP and GCP compliance requires significant expenditure of time, money and effort in the areas of training, 
recordkeeping, production and quality control.

With passage of FDORA, Congress clarified FDA’s authority to conduct inspections by expressly permitting inspection of facilities involved in the 

preparation, conduct, or analysis of clinical and non-clinical studies submitted to FDA as well as other persons holding study records or involved in the 
study process.

Decisions on a BLA

After evaluating the application and all related information, including the advisory committee recommendations, if any, and inspection reports of 

manufacturing facilities and clinical trial sites, the FDA will issue either a Complete Response Letter, or CRL, or an approval letter. To reach this 
determination, the FDA must determine that the expected benefits of the proposed product outweigh its potential risks to patients. This “benefit-risk” 
assessment is informed by the extensive body of evidence about the product in the BLA.

A CRL indicates that the review cycle of the application is complete, and the application will not be approved in its present form. A CRL generally 
outlines the deficiencies in the submission and may require substantial additional testing or information in order for the FDA to reconsider the application. 
A CRL generally outlines the deficiencies in the submission and may require substantial additional testing or information in order for the FDA to 
reconsider the application. The deficiencies identified may be minor, for example, requiring labeling changes; or major, for example, requiring additional 
clinical trials. Additionally, the CRL may include recommended actions that the sponsor might take to place the application in a condition for approval. If a 
CRL is issued, the sponsor may either resubmit the BLA, addressing all of the deficiencies identified in the letter, or withdraw the application. For those 
seeking to challenge FDA’s CRL decision, the agency has indicated that sponsors may request a formal hearing on the CRL or they may file a request for 
reconsideration or a request for a formal dispute resolution. 

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If a product receives regulatory approval, the FDA will issue an approval letter. The approval may be significantly limited to specific diseases and 
dosages or the indications for use may otherwise be limited, which could restrict the commercial value of the product. Further, the FDA may require that 
certain contraindications, warnings or precautions be included in the product labeling. The FDA may impose restrictions and conditions on product 
distribution, prescribing or dispensing in the form of a REMS, or otherwise limit the scope of any approval. In addition, the FDA may require post-
marketing clinical trials, sometimes referred to as Phase IV clinical trials, designed to further assess a biologic product’s safety and effectiveness, and 
testing and surveillance programs to monitor the safety of approved products that have been commercialized. 

The FDA has agreed to specified performance goals in the review of BLAs under the PDUFA. One such goal is to review standard BLAs in ten 

months after the FDA accepts the BLA for filing, and priority BLAs in six months, whereupon a review decision is to be made. The FDA does not always 
meet its PDUFA goal dates for standard and priority BLAs and its review goals are subject to change from time to time. The review process and the 
PDUFA goal date may be extended by three months if the FDA requests or the BLA sponsor otherwise provides additional information or clarification 
regarding information already provided in the submission within the last three months before the PDUFA goal date. 

Biosimilars and Reference Product Exclusivity  

The Patient Protection and Affordable Care Act and the companion Health Care and Education Reconciliation Act, or the Health Care Reform Law, 
which was signed into law on March 23, 2010, included a subtitle called the Biologics Price Competition and Innovation Act of 2009, or BPCIA. That Act 
established a regulatory scheme authorizing the FDA to approve biosimilars and interchangeable biosimilars. 

Under the BPCIA, a manufacturer may submit an application for licensure of a biologic product that is “biosimilar to” or “interchangeable with” a 

previously approved biological product or “reference product.” In order for the FDA to approve a biosimilar product, it must find that there are no clinically 
meaningful differences between the reference product and proposed biosimilar product in terms of safety, purity and potency. For the FDA to approve a 
biosimilar product as interchangeable with a reference product, the agency must find that the biosimilar product can be expected to produce the same 
clinical results as the reference product, and (for products administered multiple times) that the biologic and the reference biologic may be switched after 
one has been previously administered without increasing safety risks or risks of diminished efficacy relative to exclusive use of the reference biologic. In 
December 2022, Congress clarified through FDORA that FDA may approve multiple first interchangeable biosimilar biological products so long as the 
products are all approved on the first day on which such a product is approved as interchangeable with the reference product. 

Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years following the date of approval of the 
reference product. The FDA may not approve a biosimilar product until 12 years from the date on which the reference product was approved. Even if a 
product is considered to be a reference product eligible for exclusivity, another company could market a competing version of that product if the FDA 
approves a full BLA for such product containing the sponsor’s own preclinical data and data from adequate and well-controlled clinical trials to 
demonstrate the safety, purity and potency of their product. The BPCIA also created certain exclusivity periods for biosimilars approved as interchangeable 
products. There have been recent government proposals to reduce the 12-year reference product exclusivity period, but none has been enacted to date. 
Since passage of the BPCIA, many states have passed laws or amendments to laws, which address pharmacy practices involving biosimilar products. 

As of December 27, 2020 (enacted as part of the Consolidated Appropriations Act, 2021), the “patent dance” lists became public information as 
listed in the Purple Book (FDA’s “Database of Licensed Biological Products”). In particular, reference product BLA holders must submit to the FDA within 
30 days of exchanging a patent list (patents with expiry dates) with a biosimilar applicant, as well as any supplemental lists. This information was 
previously maintained a confidential as between the BLA holder and biosimilar applicant. Despite publication of these lists, a BLA holder may assert other 
patents against future filers, and does not exclude enforcement of newly granted patents.

Additionally, under the Act, the FDA must now publish in the Purple Book the following information about patented biological products:

•

•

•

•

a list of each biological product, by nonproprietary name, for which a biologics license is in effect;

the date of licensure and the application number;

the licensure status and, as available, the marketing status; and

exclusivity periods.

The FDA must publish in the Purple Book all of the above information in the first instance within 180 days of enactment and update every 30 days.

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The FDA has approved a number of biosimilars and several interchangeable biosimilar products. The FDA has also issued numerous guidance 

documents outlining its approach to reviewing and licensing biosimilars and interchangeable biosimilars under the PHS Act.

Pediatric exclusivity 

Pediatric exclusivity is another type of non-patent exclusivity in the United States and, if granted, provides for the attachment of an additional six 

months of regulatory exclusivity to the term of any existing regulatory exclusivity, including reference product and orphan exclusivity. This six-month 
exclusivity may be granted if an application sponsor submits pediatric data that fairly respond to a written request from the FDA for such data. The data do 
not need to show the product to be effective in the pediatric population studied; rather, if the clinical trial is deemed to fairly respond to the FDA’s request, 
the additional protection is granted. If reports of requested pediatric studies are submitted to and accepted by the FDA within the statutory time limits, 
whatever statutory or regulatory periods of exclusivity cover the product are extended by six months. Thus, pediatric exclusivity adds six months to 
existing exclusivity periods applicable to biological products under the BPCIA—namely, the four-year period during which the FDA will not consider an 
application for a biosimilar product, and the 12-year period during which the FDA will not approve a biosimilar application.

Orphan drug designation and exclusivity

Under the Orphan Drug Act, the FDA may designate a biologic product as an “orphan drug” if it is intended to treat a rare disease or condition 
(generally meaning that it affects fewer than 200,000 individuals in the United States, or more in cases in which there is no reasonable expectation that the 
cost of developing and making a biologic product available in the United States for treatment of the disease or condition will be recovered from sales of the 
product). Orphan product designation must be requested before submitting a BLA. After the FDA grants orphan product designation, the identity of the 
therapeutic agent and its potential orphan use are disclosed publicly by the FDA. Orphan product designation does not convey any advantage in, or shorten 
the duration of, the regulatory review and approval process. 

If a product with orphan status receives the first FDA approval for the disease or condition for which it has such designation, the product is entitled 

to orphan product exclusivity, meaning that the FDA may not approve any other applications to market the same drug or biologic product for the same 
indication for seven years, except in limited circumstances, such as if the party holding the exclusivity fails to assure the availability of sufficient quantities 
of the drug to meet the needs of patients with the disease or condition for which the drug was designated. In addition, the FDA may not approve other 
applications to market the same drug or biologic product for the same indication for seven years unless the sponsor of the other product demonstrates that 
its product is clinically superior to the product with orphan drug exclusivity. Under Omnibus legislation enacted in December 2020, this clinical superiority 
requirement applies to drugs and biologics that received orphan drug designation before enactment of the FDA Reauthorization Act in 2017, but have not 
yet been approved or licensed by FDA. 

Orphan exclusivity does not block the approval of a different product for the same rare disease or condition, nor does it block the approval of the 

same product for different indications. In particular, the concept of what constitutes the "same drug" for purposes of orphan drug exclusivity remains in flux 
in the context of gene therapies, and the FDA issued final guidance in September 2021 suggesting that it would not consider two gene therapy products to 
be different drugs solely based on minor differences in the transgenes or vectors. If a product designated as an orphan drug ultimately receives marketing 
approval for an indication broader than what was designated in its orphan drug application, it may not be entitled to exclusivity. Orphan medicinal product 
status in the European Union has similar, but not identical, benefits. 

In September 2021, the Court of Appeals for the 11th Circuit held that, for the purpose of determining the scope of market exclusivity, the term 
“same disease or condition” in the statute means the designated “rare disease or condition” and could not be interpreted by the FDA to mean the “indication 
or use.” Thus, the court concluded, orphan drug exclusivity applies to the entire designated disease or condition rather than the “indication or use.” 
Although there have been legislative proposals to overrule this decision, they have not been enacted into law. On January 23, 2023, FDA announced that, in 
matters beyond the scope of that court order, FDA will continue to apply its existing regulations tying orphan-drug exclusivity to the uses or indications for 
which the orphan drug was approved.

Expedited development and review programs 

The FDA is authorized to expedite the review of BLAs in several ways. Under the Fast Track program, the sponsor of a biologic product candidate 

may request the FDA to designate the product for a specific indication as a Fast Track product concurrent with or after the filing of the IND. Biologic 
products are eligible for Fast Track designation if they are intended to treat a serious or life-threatening condition and demonstrate the potential to address 
unmet medical needs for the condition. Fast Track designation applies to the combination of the product candidate and the specific indication for which it is 
being studied. In addition to other benefits, such as the ability to have greater interactions with the FDA, the FDA may initiate review of sections of a Fast 
Track BLA before the application is complete, a process known as rolling review. 

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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 breakthrough therapy designation, priority review and accelerated approval.

•

•

•

•

Breakthrough therapy designation. To qualify for the breakthrough therapy program, product candidates must be intended to treat a serious or 
life-threatening disease or condition and preliminary clinical evidence must indicate that such product candidates may demonstrate substantial 
improvement on one or more clinically significant endpoints over existing therapies. The FDA will seek to ensure the sponsor of a 
breakthrough therapy product candidate receives intensive guidance on an efficient drug development program, intensive involvement of 
senior managers and experienced staff on a proactive, collaborative and cross-disciplinary review and rolling review. 

Priority review. A product candidate is eligible for priority review if it treats a serious condition and, if approved, it would be a significant 
improvement in the safety or effectiveness of the treatment, diagnosis or prevention compared to marketed products. FDA aims to complete its 
review of priority review applications within six months as opposed to 10 months for standard review. 

Accelerated approval. Drug or biologic products studied for their safety and effectiveness in treating serious or life-threatening illnesses and 
that provide meaningful therapeutic benefit over existing treatments may receive accelerated approval. Accelerated approval means that a 
product candidate may be approved on the basis of adequate and well controlled clinical trials establishing that the product candidate has an 
effect on a surrogate endpoint that is reasonably likely to predict a clinical benefit, or on the basis of an effect on a clinical endpoint other than 
survival or irreversible morbidity or mortality or other clinical benefit, taking into account the severity, rarity and prevalence of the condition 
and the availability or lack of alternative treatments. As a condition of approval, the FDA may require that a sponsor of a drug or biologic 
product candidate receiving accelerated approval perform adequate and well controlled post-marketing clinical trials. In addition, the FDA 
currently requires as a condition for accelerated approval pre-approval of promotional materials. 

With passage of FDORA, Congress modified certain provisions governing accelerated approval of drug and biologic products. Specifically, the 
new legislation authorized the FDA to: require a sponsor to have its confirmatory clinical trial underway before accelerated approval is 
awarded, require a sponsor of a product granted accelerated approval to submit progress reports on its post-approval studies to FDA every six 
months (until the study is completed) and use expedited procedures to withdraw accelerated approval of an NDA or BLA after the 
confirmatory trial fails to verify the product’s clinical benefit. Further, FDORA requires the agency to publish on its website “the rationale for 
why a post-approval study is not appropriate or necessary” whenever it decides not to require such a study upon granting accelerated approval. 

Regenerative advanced therapy. With passage of the Cures Act in December 2016, Congress authorized the FDA to accelerate review and 
approval of products designated as regenerative advanced therapies. A product is eligible for this designation if it is a regenerative medicine 
therapy that is intended to treat, modify, reverse or cure a serious or life-threatening disease or condition and preliminary clinical evidence 
indicates that the product candidate has the potential to address unmet medical needs for such disease or condition. The benefits of a 
regenerative advanced therapy designation include early interactions with the FDA to expedite development and review, benefits available to 
breakthrough therapies, potential eligibility for priority review and accelerated approval based on surrogate or intermediate endpoints. 

None of these expedited programs change the standards for approval but they may help expedite the development or approval process of product 

candidates. 

Rare Pediatric Disease Designation and Priority Review Vouchers

In 2012, Congress enacted the FDASIA, requiring the FDA to award priority review vouchers, or PRVs, to sponsors of certain rare pediatric disease 

product applications. This program is designed to encourage development of new drug and biological products for prevention and treatment of “rare 
pediatric diseases” by, upon initial approval of an application meeting certain specified criteria, providing companies with a voucher that can be redeemed 
to receive a priority review of a subsequent marketing application for a different product. The sponsor of a rare pediatric disease product receiving a PRV 
may sell or otherwise transfer the voucher to another company. The voucher may be further transferred any number of times before the voucher is used, as 
long as the sponsor making the transfer has not yet submitted an application relying on the priority review voucher. The FDA may also revoke any PRV if 
the rare pediatric disease product for which the voucher was awarded is not marketed in the United States within one year following the date of approval.

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In order to receive a PRV upon BLA or NDA approval, the product must receive designation from the FDA as a product for a rare pediatric disease 

prior to submission of the marketing application. A “rare pediatric disease” is a disease that is serious or life-threatening, in which the serious or life-
threatening manifestations primarily affect individuals aged from birth to 18 years and affects fewer than 200,000 people in the United States, or affects 
more than 200,000 people in the United States but there is no reasonable expectation that the cost of developing and making available in the United States a 
product for such disease or condition will be recovered from sales in the United States of such product. In addition to receiving rare pediatric disease 
designation, in order to receive a PRV, the NDA or BLA must be given priority review, rely on clinical data derived from studies examining a pediatric 
population and dosages of the product intended for that population, not seek approval for a different adult indication in the original rare pediatric disease 
product application and be for a product that does not include a previously approved active ingredient.

The Rare Pediatric Disease PRV program was scheduled to expire after September 30, 2020. After that, only drugs designated as rare pediatric 

treatments and approved by the FDA by October 1, 2022, could receive a voucher. In December 2020, however, Congress renewed the program as part of 
the 2021 Coronavirus Response and Relief Supplemental Consolidated Appropriations Act through the federal fiscal year 2024. Thus, under the current 
statutory sunset provisions, FDA may only award PRVs for approved rare pediatric disease product applications if sponsors have rare pediatric disease 
designation for the drug granted by September 30, 2024. The FDA may not award any rare pediatric disease PRVs after September 30, 2026.

Post-approval requirements 

After regulatory approval of a product is obtained, there may be a number of post-approval requirements. For example, as a condition of approval of 

a BLA, the FDA may require post-marketing testing and surveillance to monitor the product’s safety or efficacy. In addition, holders of an approved BLA 
are required to keep extensive records, to report certain adverse reactions and production problems to the FDA, to provide updated safety and efficacy 
information and to comply with requirements concerning advertising and promotional labeling for their products. Also, quality control and manufacturing 
procedures must continue to conform to cGMP regulations and practices, as well as the manufacturing conditions of approval set forth in the BLA. The 
FDA periodically inspects manufacturing facilities to assess compliance with cGMP requirements, which impose certain procedural, substantive and 
recordkeeping requirements. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality control to 
maintain compliance with cGMP and other aspects of regulatory compliance. 

The FDA strictly regulates marketing, labeling, advertising and promotion of products that are placed on the market. Products may be promoted 

only for the approved indications and in accordance with the provisions of the approved label. The FDA and other agencies actively enforce the laws and 
regulations prohibiting the promotion of off-label uses, and a company that is found to have improperly promoted off-label uses may be subject to 
significant liability. In September 2021, the FDA published final regulations which describe the types of evidence that the agency will consider in 
determining the intended use of a biologic product.

It may be permissible, under very specific, narrow conditions, for a manufacturer to engage in nonpromotional, non-misleading communication 

regarding off-label information, such as distributing scientific or medical journal information.  Moreover, with passage of the Pre-Approval Information 
Exchange Act in December 2022, sponsors of products that have not been approved may proactively communicate to payors certain information about 
products in development to help expedite patient access upon product approval.  Previously, such communications were permitted under FDA guidance but 
the new legislation explicitly provides protection to sponsors who convey certain information about products in development to payors, including 
unapproved uses of approved products.

 If a company is found to have promoted off-label uses, it may become subject to adverse public relations and administrative and judicial 
enforcement by the FDA, the Department of Justice, or the Office of the Inspector General of the Department of Health and Human Services, as well as 
state authorities. This could subject a company to a range of penalties that could have a significant commercial impact, including civil and criminal fines 
and agreements that materially restrict the manner in which a company promotes or distributes drug products.

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U.S. patent term restoration

Depending upon the timing, duration and specifics of FDA approval of product candidates, some of a sponsor’s U.S. patents may be eligible for 

limited patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, or the Hatch-Waxman Amendments. The Hatch-
Waxman Amendments permit a patent restoration term of up to five years as compensation for patent terms lost during product development and FDA 
regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product’s 
approval date. The patent term restoration period generally is 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. Only one patent applicable to an approved biologic product is eligible 
for the extension, the application for the extension must be submitted prior to the expiration of the patent, and only those claims covering the approved 
drug, a method for using it or a method for manufacturing it may be extended. Moreover, a given patent may only be extended once based on a single 
product. The USPTO in consultation with the FDA, reviews and approves the application for any patent term extension or restoration. 

Government regulation outside of the U.S. 

In addition to regulations in the United States, a manufacturer is subject to a variety of regulations in foreign jurisdictions to the extent it chooses to 

sell any products in those foreign countries. Even if a manufacturer obtains FDA approval of a product, it must still obtain the requisite approvals from 
regulatory authorities in foreign countries prior to the commencement of clinical trials or marketing of the product in those countries. Because biologically 
sourced materials are subject to unique contamination risks, their use may also be restricted in some countries. 

Clinical trial approval in the European Union 

On January 31, 2022, the new Clinical Trials Regulation (EU) No 536/2014 became effective in the European Union and replaced the prior Clinical 

Trials Directive 2001/20/EC. The new regulation aims at simplifying and streamlining the authorization, conduct and transparency of clinical trials in the 
European Union. Under the new coordinated procedure for the approval of clinical trials, the sponsor of a clinical trial to be conducted in more than one 
Member State of the European Union, or EU Member State, will only be required to submit a single application for approval. The submission will be made 
through the Clinical Trials Information System, a new clinical trials portal overseen by the EMA and available to clinical trial sponsors, competent 
authorities of the EU Member States and the public. 

Beyond streamlining the process, the new Regulation includes a single set of documents to be prepared and submitted for the application as well as 

simplified reporting procedures for clinical trial sponsors, and a harmonized procedure for the assessment of applications for clinical trials, which is divided 
in two parts. Part I is assessed 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). 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 new regulation did not change the preexisting requirement that a sponsor must obtain prior approval from the competent national authority of 

the EU Member State in which the clinical trial is to be conducted. If the clinical trial is conducted in different EU Member States, the competent 
authorities in each of these EU Member States must provide their approval for the conduct of the clinical trial. Furthermore, the sponsor may only start a 
clinical trial at a specific study site after the applicable ethics committee has issued a favorable opinion.

Parties conducting certain clinical studies must, as in the U.S., post clinical trial information in the European Union at the EudraCT website: 

https://eudract.ema.europa.eu.

PRIME designation 

In March 2016, the EMA, launched the PRIority MEdicines, or PRIME, initiative to foster research and development of medicines that may offer a 

major therapeutic advantage over existing treatments, or benefit patients without treatment options. PRIME aims to strengthen clinical trial designs to 
facilitate the generation of high-quality data for the evaluation of an application for marketing authorization. To be accepted for PRIME, a medicine has to 
show its potential to benefit patients 

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with unmet medical needs based on preclinical and/or early clinical data. These medicines are considered priority medicines within the European Union. 

After an investigational candidate has been selected for PRIME, developers are assigned a rapporteur from the Committee for Human Medicinal 

Products, or CHMP, to provide continuous support and help to build knowledge ahead of a marketing authorization application, or MAA. A 
multidisciplinary group of experts will provide broader guidance on the overall development plan and regulatory strategy of the product. Companies are 
also eligible for accelerated assessment at the time of their regulatory application.

Pediatric Studies

Sponsors developing a new medicinal product must agree upon a Pediatric Investigation Plan, or PIP, with the EMA’s pediatric committee, or 
PDCO, and must conduct pediatric clinical trials in accordance with that PIP, unless a waiver applies (e.g., because the relevant disease or condition occurs 
only in adults). The PIP sets out the timing and measures proposed to generate data to support a pediatric indication of the drug for which marketing 
authorization is being sought. The marketing authorization application for the product must include the results of pediatric clinical trials conducted in 
accordance with the PIP, unless a waiver applies, or a deferral has been granted by the PDCO of the obligation to implement some or all of the measures of 
the PIP until there are sufficient data to demonstrate the efficacy and safety of the product in adults, in which case the pediatric clinical trials must be 
completed at a later date.

Marketing authorization 

In the European Union, marketing authorizations for medicinal products may be obtained through several different procedures founded on the same 

basic regulatory process. 

The centralized procedure provides for the grant of a single marketing authorization by the European Commission that is valid across the European 
Economic Area (i.e., the EU as well as Iceland, Liechtenstein and Norway). The centralized procedure is compulsory for medicinal products produced by 
certain biotechnological processes, products designated as orphan medicinal products, and products with a new active substance indicated for the treatment 
of certain diseases. It is optional for those products that are highly innovative or for which a centralized process is in the interest of patients. Under the 
centralized procedure in the European Union, the maximum timeframe for the evaluation of an MAA is 210 days, excluding clock stops, when additional 
written or oral information is to be provided by the sponsor in response to questions asked by the CHMP. Accelerated evaluation may be granted by the 
CHMP in exceptional cases. These are defined as circumstances in which a medicinal product is expected to be of a “major public health interest.” Three 
cumulative criteria must be fulfilled in such circumstances: the seriousness of the disease, such as severely disabling or life-threatening diseases, to be 
treated; the absence or insufficiency of an appropriate alternative therapeutic approach; and anticipation of high therapeutic benefit. In these circumstances, 
the EMA ensures that the opinion of the CHMP is given within 150 days. 

The EMA’s Committee for Advanced Therapies, or CAT, is responsible for assessing the quality, safety and efficacy of advanced-therapy medicinal 
products. Advanced-therapy medical products include gene therapy medicine, somatic cell therapy medicines and tissue-engineered medicines. The role of 
the CAT is to prepare a draft opinion on an application for marketing authorization for a gene therapy medicinal candidate that is submitted to the EMA. In 
the EU, the development and evaluation of a gene therapy medicinal product must be considered in the context of the relevant EU guidelines. The EMA 
may issue new guidelines concerning the development and marketing authorization for somatic cell therapy medicinal products and require that we comply 
with these new guidelines. Similarly, complex regulatory environments exist in other jurisdictions in which we might consider seeking regulatory approvals 
for our product candidates, further complicating the regulatory landscape. As a result, the procedures and standards applied to gene therapy products and 
cell therapy products may be applied to any of our gene therapy or genome editing candidates, but that remains uncertain at this point.

Specifically, the grant of marketing authorization in the European Union for products containing viable human tissues or cells such as gene therapy 
medicinal products is governed by Regulation 1394/2007/EC on advanced therapy medicinal products, read in combination with Directive 2001/83/EC of 
the European Parliament and of the Council, commonly known as the Community code on medicinal products. Regulation 1394/2007/EC includes specific 
rules concerning the authorization, supervision, and pharmacovigilance of gene therapy medicinal products, somatic cell therapy medicinal products, and 
tissue engineered products. Manufacturers of advanced therapy medicinal products must demonstrate the quality, safety, and efficacy of their products to 
EMA which provides an opinion regarding the MAA. The European Commission grants or refuses marketing authorization in light of the opinion delivered 
by EMA. 

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The decentralized procedure provides for approval by one or more other concerned EU Member States of an assessment of an application for 

marketing authorization conducted by one EU Member State, known as the reference EU Member State. In accordance with this procedure, a sponsor 
submits an application for marketing authorization to the reference EU Member State and the concerned EU Member States. This application is identical to 
the application that would be submitted to the EMA for authorization through the centralized procedure. The reference EU Member State prepares a draft 
assessment and drafts of the related materials within 120 days after receipt of a valid application. The resulting assessment report is submitted to the 
concerned EU Member States which, within 90 days of receipt, must decide whether to approve the assessment report and related materials. 

If a concerned EU Member State cannot approve the assessment report and related materials due to concerns relating to a potential serious risk to 

public health, disputed elements may be referred to the European Commission, whose decision is binding on all EU Member States. In accordance with the 
mutual recognition procedure, the sponsor applies for national marketing authorization in one EU Member State. Upon receipt of this authorization the 
sponsor can then seek the recognition of this authorization by other EU Member States. Authorization in accordance with either of these procedures will 
result in authorization of the medicinal product only in the reference EU Member State and in the other concerned EU Member States. 

A marketing authorization may be granted only to a sponsor established in the European Union. Regulation No. 1901/2006 provides that, prior to 

obtaining a marketing authorization in the European Union, a sponsor must demonstrate compliance with all measures included in a Pediatric Investigation 
Plan, or PIP, approved by the Pediatric Committee of the EMA, covering all subsets of the pediatric population, unless the EMA has granted a product-
specific waiver, class waiver, or a deferral for one or more of the measures included in the PIP. 

In specific circumstances, E.U. legislation on Conditional Marketing Authorizations for Medicinal Products for Human Use, or conditional 
marketing authorization, enables sponsors to obtain a conditional marketing authorization prior to obtaining the comprehensive clinical data required for an 
application for a full marketing authorization. Such conditional approvals may be granted for product candidates (including medicines designated as orphan 
medicinal products) if the risk-benefit balance of the product candidate is positive, it is likely that the sponsor will be in a position to provide the required 
comprehensive clinical trial data, the product fulfills unmet medical needs and the benefit to public health of the immediate availability on the market of the 
medicinal product concerned outweighs the risk inherent in the fact that additional data are still required. A conditional marketing authorization may 
contain specific obligations to be fulfilled by the marketing authorization holder, including obligations with respect to the completion of ongoing or new 
studies, and with respect to the collection of pharmacovigilance data. 

Conditional marketing authorization 

Conditional marketing authorizations are valid for one year, and may be renewed annually, if the risk-benefit balance remains positive, and after an 
assessment of the need for additional or modified conditions and/or specific obligations. The timelines for the centralized procedure described above also 
apply with respect to the review by the CHMP of applications for a conditional marketing authorization. 

The requirements and processes governing the conduct of clinical trials, product licensing, pricing and reimbursement vary from country to country. 

In all cases, the clinical trials are conducted in accordance with GCPs and the applicable regulatory requirements of the country or countries in which the 
clinical trial is performed, as well as the ethical principles that have their origin in the Declaration of Helsinki (whichever provides the greater protection to 
the clinical trial participants). 

General Data Protection Regulation

The collection, use, disclosure, transfer, or other processing of personal data regarding individuals in the EU, including personal health data, is 

subject to the EU General Data Protection Regulation, or the GDPR, which became effective on May 25, 2018. The GDPR is wide-ranging in scope and 
imposes numerous requirements on companies that process personal data, including requirements relating to processing health and other sensitive data, 
obtaining consent of the individuals to whom the personal data relates, providing information to individuals regarding data processing activities, 
implementing safeguards to protect the security and confidentiality of personal data, providing notification of data breaches, and taking certain measures 
when engaging third-party processors. The GDPR also imposes strict rules on the transfer of personal data to countries outside the EU, including the U.S., 
and permits data protection authorities to impose large penalties for violations of the GDPR, including potential fines of up to €20 million or 4% of annual 
global revenues, 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. 

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Compliance with the GDPR will be a rigorous and time-intensive process that may increase the cost of doing business or require companies to 

change their business practices to ensure full compliance. In July 2020, the Court of Justice of the European Union, or the CJEU, invalidated the EU-U.S. 
Privacy Shield framework, one of the mechanisms used to legitimize the transfer of personal data from the EEA to the United States. The CJEU decision 
also drew into question the long-term viability of an alternative means of data transfer, the standard contractual clauses, for transfers of personal data from 
the EEA to the United States. 

Additionally, in October 2022, President Biden signed an executive order to implement the EU-U.S. Data Privacy Framework, which would serve as 
a replacement to the EU-U.S. Privacy Shield. The European Commission initiated the process to adopt an adequacy decision for the EU-U.S. Data Privacy 
Framework in December 2022. It is unclear if and when the framework will be finalized and whether it will be challenged in court. The uncertainty around 
this issue may further impact our business operations in the EU.

Following the withdrawal of the United Kingdom from the EU, the U.K. Data Protection Act 2018 applies to the processing of personal data that 

takes place in the United Kingdom and includes parallel obligations to those set forth by GDPR, including in relation to data transfers.

Orphan Drug Designation and Exclusivity

The criteria for designating an orphan medicinal product in the EU are similar in principle to those in the United States. Under Article 3 of 

Regulation (EC) 141/2000, a medicinal product may be designated as orphan if (1) it 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) the product, without the benefits derived from orphan status, would not generate sufficient return in the EU to justify investment and (3) there 
exists no satisfactory method of diagnosis, prevention or treatment of such condition authorized for marketing in the EU, or if such a method exists, the 
product will be of significant benefit to those affected by the condition. The term “significant benefit” is defined in Regulation (EC) 847/2000 to mean a 
clinically relevant advantage or a major contribution to patient care.

Orphan medicinal products are eligible for financial incentives such as reduction of fees or fee waivers and are, upon grant of a marketing 

authorization, entitled to ten years of market exclusivity for the approved therapeutic indication. During this ten year market exclusivity period, the EMA or 
the competent authorities of the Member States of the European Economic Area, or EEA, cannot accept an application for a marketing authorization for a 
similar medicinal product for the same indication. 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. The application for orphan 
designation must be submitted before the application for marketing authorization. The sponsor will receive a fee reduction for the marketing authorization 
application if the orphan designation has been granted, but not if the designation is still pending at the time the marketing authorization is submitted. 
Orphan designation does not convey any advantage in, or shorten the duration of, the regulatory review and approval process.

The ten-year market exclusivity in the EU may be reduced to six years if, at the end of the fifth year, it is established that the product no longer 
meets the criteria for orphan designation, for example, if the product is sufficiently profitable not to justify maintenance of market exclusivity. Additionally, 
marketing authorization may be granted to a similar product for the same indication at any time if: (1) the second sponsor can establish that its product, 
although similar, is safer, more effective or otherwise clinically superior; (2) the sponsor consents to a second orphan medicinal product application; or (3) 
the sponsor cannot supply enough orphan medicinal product.

Pediatric Exclusivity

Products that are granted a marketing authorization with the results of the pediatric clinical trials conducted in accordance with the PIP are eligible 

for a six month extension of the protection under a supplementary protection certificate (if any is in effect at the time of approval) even where the trial 
results are negative. 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.

26

 
Brexit and the Regulatory Framework in the United Kingdom

The United Kingdom’s withdrawal from the EU took place on January 31, 2020. As of January 1, 2021, the Medicines and Healthcare products 

Regulatory Agency, or the MHRA, became responsible for supervising medicines and medical devices in Great Britain, comprising England, Scotland and 
Wales under domestic law whereas Northern Ireland continues to be subject to EU rules under the Northern Ireland Protocol. The MHRA will rely on the 
Human Medicines Regulations 2012 (SI 2012/1916) (as amended), or the HMR, as the basis for regulating medicines. The HMR has incorporated into the 
domestic law the body of EU law instruments governing medicinal products that pre-existed prior to the United Kingdom’s withdrawal from the EU. Until 
December 31, 2023, the MHRA may rely on a decision taken by the European Commission on the approval of a new marketing authorization via the 
centralized procedure.

27

 
Healthcare law and regulation 

Healthcare providers and third-party payors play a primary role in the recommendation and prescription of products that are granted marketing 
approval. Arrangements with providers, consultants, third-party payors and customers are subject to broadly applicable fraud and abuse, anti-kickback, 
false claims laws, reporting of payments to physicians and teaching physicians and patient privacy laws and regulations and other healthcare laws and 
regulations that may constrain business and/or financial arrangements. Restrictions under applicable federal and state healthcare laws and regulations, 
include the following: 

•

•

•

•

•

•

•

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

the federal civil and criminal false claims laws, including the civil False Claims Act, and civil monetary penalties laws, which prohibit 
individuals or entities from, among other things, knowingly presenting, or causing to be presented, to the federal government, claims for 
payment that are false, fictitious or fraudulent or knowingly making, using or causing to made or used a false record or statement to avoid, 
decrease or conceal an obligation to pay money to the federal government; 

the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which created additional federal criminal laws that 
prohibit, among other things, knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program 
or making false statements relating to healthcare matters; 

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

the federal false statements statute, which prohibits knowingly and willfully falsifying, concealing or covering up a material fact or making any 
materially false statement in connection with the delivery of or payment for healthcare benefits, items or services; 

the federal transparency requirements known as the federal Physician Payments Sunshine Act, under the Health Care Reform Law, which 
requires certain manufacturers of drugs, devices, biologics and medical supplies to report annually to the Centers for Medicare & Medicaid 
Services, or CMS, within the United States Department of Health and Human Services, information related to payments and other transfers of 
value made by that entity to physicians, other healthcare professionals and teaching hospitals, as well as ownership and investment interests 
held by physicians and their immediate family members; and 

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

Some state laws require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines and the relevant 

compliance guidance promulgated by the federal government in addition to requiring manufacturers to report information related to payments to physicians 
and other health care providers or marketing expenditures. State and foreign laws also govern the privacy and security of health information in some 
circumstances, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts. 

28

 
Pharmaceutical insurance coverage and health care reform 

In the United States and markets in other countries, patients who are prescribed treatments for their conditions and providers performing the 
prescribed services generally rely on third-party payors to reimburse all or part of the associated health care costs. Significant uncertainty exists as to the 
coverage and reimbursement status of products approved by the FDA and other government authorities. Thus, even if a product candidate is approved, 
sales of the product will depend, in part, on the extent to which third-party payors, including government health programs in the United States such as 
Medicare and Medicaid, commercial health insurers and managed care organizations, provide coverage and establish adequate reimbursement levels for, 
the product. The process for determining whether a payor will provide coverage for a product may be separate from the process for setting the price or 
reimbursement rate that the payor will pay for the product once coverage is approved. Third-party payors are increasingly challenging the prices charged, 
examining the medical necessity and reviewing the cost-effectiveness of medical products and services and imposing controls to manage costs. Third-party 
payors may limit coverage to specific products on an approved list, also known as a formulary, which might not include all of the approved products for a 
particular indication.

By way of example, the United States and state governments continue to propose and pass legislation designed to reduce the cost of healthcare. In 
March 2010, the United States Congress enacted the Health Care Reform Law, which, among other things, includes changes to the coverage and payment 
for products under government health care programs.  In addition, other legislative changes have been proposed and adopted since the Health Care Reform 
Law was enacted. In August 2011, the Budget Control Act of 2011, among other things, created measures for spending reductions by Congress. A Joint 
Select Committee on Deficit Reduction, tasked with recommending a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, was 
unable to reach required goals, thereby triggering the legislation’s automatic reduction to several government programs. These changes included aggregate 
reductions to Medicare payments to providers of up to 2% per fiscal year, which went into effect in April 2013 and will remain in effect through 2031 
under the Coronavirus Aid, Relief, and Economic Security Act. These Medicare sequester reductions were reduced and suspended through June 2022, with 
the full 2% cut resuming thereafter.

The American Taxpayer Relief Act of 2012, among other things, reduced Medicare payments to several providers and increased the statute of 
limitations period for the government to recover overpayments to providers from three to five years. These laws may result in additional reductions in 
Medicare and other healthcare funding and otherwise affect the prices we may obtain for any of our candidates for which we may obtain regulatory 
approval or the frequency with which any such candidate is prescribed or used. Indeed, under current legislation, the actual reductions in Medicare 
payments may vary up to 4%.

Since enactment of the Health Care Reform Law, there have been, and continue to be, numerous legal challenges and Congressional actions to 

repeal and replace provisions of the law. For example, with enactment of the Tax Cuts and Jobs Act of 2017, or the TCJA, Congress repealed the 
“individual mandate.” The repeal of this provision, which requires most Americans to carry a minimal level of health insurance, became effective in 2019. 
On December 14, 2018, a U.S. District Court judge in the Northern District of Texas ruled that the individual mandate portion of the Health Care Reform 
Law is an essential and inseverable feature of the Health Care Reform Law, and therefore because the mandate was repealed as part of the TCJA, the 
remaining provisions of the Health Care Reform Law are invalid as well. The U.S. Supreme Court heard this case on November 10, 2020 and, on June 17, 
2021, dismissed this action after finding that the plaintiffs do not have standing to challenge the constitutionality of the Health Care Reform Law. Litigation 
and legislation over the Health Care Reform Law are likely to continue, with unpredictable and uncertain results.

Although the previous administration took executive actions to undermine or delay implementation of the Health Care Reform Law, President Biden 

rescinded those actions with the issuance of an Executive Order on January 28, 2021, which directs federal agencies to reconsider rules and other policies 
that limit Americans’ access to health care, and consider actions that will protect and strengthen that access. Under this Order, federal agencies are directed 
to re-examine: policies that undermine protections for people with pre-existing conditions, including complications related to COVID-19; demonstrations 
and waivers under Medicaid and the Health Care Reform Law that may reduce coverage or undermine the programs, including work requirements; policies 
that undermine the Health Insurance Marketplace or other markets for health insurance; policies that make it more difficult to enroll in Medicaid and the 
Health Care Reform Law; and policies that reduce affordability of coverage or financial assistance, including for dependents.

29

 
Pharmaceutical Prices

The prices of prescription pharmaceuticals have also been the subject of considerable discussion in the United States. There have been several recent 

U.S. congressional inquiries, as well as proposed and enacted state and federal legislation designed to, among other things, bring more transparency to 
pharmaceutical pricing, review the relationship between pricing and manufacturer patient programs, and reduce the costs of pharmaceuticals under 
Medicare and Medicaid. In 2020, CMS issued an interim final rule implementing a most favored nation model for prices that would tie Medicare Part B 
payments for certain physician-administered pharmaceuticals to the lowest price paid in other economically advanced countries, effective January 1, 2021. 
That rule, however, has been subject to a nationwide preliminary injunction and, on December 29, 2021, CMS issued a final rule to rescind it. With 
issuance of this rule, CMS stated that it will explore all options to incorporate value into payments for Medicare Part B pharmaceuticals and improve 
beneficiaries' access to evidence-based care.

In addition, in October 2020, HHS and the FDA published a final rule allowing states and other entities to develop a Section 804 Importation 
Program, or SIP, to import certain prescription drugs from Canada into the United States. The final rule is currently the subject of ongoing litigation, but at 
least six states (Vermont, Colorado, Florida, Maine, New Mexico, and New Hampshire) have passed laws allowing for the importation of drugs from 
Canada with the intent of developing SIPs for review and approval by the FDA. Further, on November 20, 2020, HHS finalized 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 final rule would eliminate the current safe harbor for Medicare drug rebates and create new 
safe harbors for beneficiary point-of-sale discounts and pharmacy benefit manager service fees. It originally was set to go into effect on January 1, 2022, 
but with passage of the Inflation Reduction Act has been delayed by Congress to January 1, 2032.

On August 16, 2022, the Inflation Reduction Act of 2022, or IRA, was signed into law by President Biden. The new legislation has implications for 
Medicare Part D, which is a program available to individuals who are entitled to Medicare Part A or enrolled in Medicare Part B to give them the option of 
paying a monthly premium for outpatient prescription drug coverage. Among other things, the IRA requires manufacturers of certain drugs to engage in 
price negotiations with Medicare (beginning in 2026), with prices that can be negotiated subject to a cap; imposes rebates under Medicare Part B and 
Medicare Part D to penalize price increases that outpace inflation (first due in 2023); and replaces the Part D coverage gap discount program with a new 
discounting program (beginning in 2025). The IRA permits the Secretary of the Department of HHS to implement many of these provisions through 
guidance, as opposed to regulation, for the initial years.

Specifically, with respect to price negotiations, Congress authorized Medicare to negotiate lower prices for certain costly single-source drug and 

biologic products that do not have competing generics or biosimilars and are reimbursed under Medicare Part B and Part D. CMS may negotiate prices for 
ten high-cost drugs paid for by Medicare Part D starting in 2026, followed by 15 Medicare Part D drugs in 2027, 15 Medicare Part B or Part D drugs in 
2028, and 20 Medicare Part B or Part D drugs in 2029 and beyond. This provision applies to drug products that have been approved for at least 9 years and 
biologics that have been licensed for 13 years, but it does not apply to drugs and biologics that have been approved for a single rare disease or condition. 
Further, the legislation subjects drug manufacturers to civil monetary penalties and a potential excise tax for failing to comply with the legislation by 
offering a price that is not equal to or less than the negotiated “maximum fair price” under the law or for taking price increases that exceed inflation. The 
legislation also requires manufacturers to pay rebates for drugs in Medicare Part D whose price increases exceed inflation. The new law also caps Medicare 
out-of-pocket drug costs at an estimated $4,000 a year in 2024 and, thereafter beginning in 2025, at $2,000 a year.

At the state level, individual states are increasingly aggressive in passing legislation and implementing regulations designed to control 

pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and 
marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. A 
number of states, for example, require drug manufacturers and other entities in the drug supply chain, including health carriers, pharmacy benefit managers, 
wholesale distributors, to disclose information about pricing of pharmaceuticals. In addition, regional health care authorities and individual hospitals are 
increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be included in their prescription drug and other 
health care programs. These measures could reduce the ultimate demand for our products, if approved, or put pressure on our product pricing. We expect 
that additional state and federal healthcare reform measures will 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 our candidates or additional pricing pressures.

30

 
Environmental regulations 

We are also subject to regulation under the Occupational Safety and Health Act, the Environmental Protection Act, the Toxic Substances Control 

Act, the Resource Conservation and Recovery Act and other present and potential federal, state or local regulations. These and other laws govern our use, 
handling and disposal of various biological and chemical substances used in, and waste generated by, our operations. Our research and development 
involves the controlled use of hazardous materials, chemicals and viruses.

Human Capital 

We recognize that attracting, motivating and retaining talented employees is vital to our success. We value the health and wellness of our employees 

and their families. It is our goal to deliver innovative programs that provide choice, quality and value. We aim to create an equitable, inclusive and 
empowering environment in which our employees can grow and advance their careers, with the overall goal of developing, expanding and retaining our 
workforce to support our current pipeline and future business goals. Our success also depends on our ability to attract, engage and retain a diverse group of 
employees. Our efforts to recruit and retain a diverse and passionate workforce include providing competitive compensation and benefits packages.

Our human capital resources objectives include, as applicable, identifying, recruiting, retaining, incentivizing and integrating our existing and 
additional employees. The principal purposes of our equity incentive plans are to attract, retain and motivate selected employees, consultants and directors 
through the granting of stock-based compensation awards. We offer a comprehensive benefits program that provides resources to help employees manage 
their health, finances, and life outside of work.

In April and December 2022, we announced reductions in our workforce as part of strategic plans designed to streamline our operating structure, 

including in connection with our acquisition of AavantiBio. As of December 31, 2022, we employed 87 full-time employees, including 59 in research and 
development and 28 in general and administrative positions, and of which 19 of our employees hold Ph.D. or M.D. degrees.  

Corporate Information 

Our principal executive offices are located at 500 Rutherford Avenue, Third Floor, Charlestown, Massachusetts 02129 and our telephone number is 

(617) 337-4680. Our website address is www.solidbio.com. The information contained in, or accessible through, our website does not constitute a part of 
this Annual Report on Form 10-K. 

We make available free of charge on our website our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-

K and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended, or the 
Exchange Act, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. 

31

 
Item 1A. Risk Factors.  

You should carefully consider the following risk factors, in addition to the other information contained in this Annual Report on Form 10-K, 
including the section of this report titled “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and our financial 
statements and related notes. If any of the events described in the following risk factors and the risks described elsewhere in this Annual Report on Form 
10-K occurs, our business, operating results and financial condition could be seriously harmed and the trading price of our common stock could decline. 
This Annual Report on Form 10-K also contains forward-looking statements that involve risks and uncertainties. Our actual results could differ materially 
from those anticipated in the forward-looking statements as a result of factors that are described below and elsewhere in this Annual Report on Form 10-K. 
The risks and uncertainties described below are not the only ones we face. Additional risks not presently known to us or other factors not perceived by us to 
present significant risks to our business at this time also may impair our business operations. 

Risks related to the Acquisition

We may fail to realize the anticipated benefits of our acquisition of AavantiBio, those benefits may take longer to realize than expected, and we may 
encounter significant integration difficulties.

On December 2, 2022, we completed our acquisition, or the Acquisition, of AavantiBio, Inc., or AavantiBio, a privately held gene therapy company 

focused on transforming the lives of patients with FA and rare cardiomyopathies. Upon the consummation of the Acquisition, we acquired AavantiBio’s 
pipeline programs which included programs for the treatment of FA and BAG3 mediated dilated cardiomyopathy, as well as additional assets for the 
treatment of undisclosed cardiac diseases. Our ability to realize the anticipated benefits of the Acquisition will depend, to a large extent, on our ability to 
integrate AavantiBio and these programs into our business and business strategy and realize anticipated growth opportunities and synergies. We have 
devoted and will continue to devote significant management attention and resources to integrating the business practices and operations of AavantiBio into 
ours. We may fail to realize some or all of the anticipated benefits of the Acquisition, including if the integration process takes longer than expected or is 
more costly than expected. Potential difficulties we may encounter in the integration process include the following:

•

•

•

•

•

the inability to successfully combine the businesses of Solid and AavantiBio in a manner that permits us to achieve the anticipated benefits 
from the Acquisition, which would result in the anticipated benefits of the Acquisition not being realized partly or wholly in the time frame 
currently anticipated or at all;

difficulties in managing the expanded operations of a more complex company following the Acquisition;

creation of uniform standards, controls, procedures, policies and information systems; 

difficulties in assimilating AavantiBio employees in our business, in maintaining employee morale and in attracting and retaining key 
personnel; and

potential unknown liabilities, adverse consequences, or unforeseen increased expenses, delays or regulatory conditions associated with the 
Acquisition.

It is possible that the integration process could result in the diversion of our management’s attention, the disruption or interruption of, or the loss of 
momentum in, our ongoing businesses or inconsistencies in standards, controls, procedures and policies, any of which could adversely affect our ability to 
maintain our relationships with third parties or the ability to achieve the anticipated benefits of the Acquisition, or could otherwise adversely affect our 
business and financial results.

Also, we now possess certain liabilities and obligations, including contractual liabilities and obligations, that were assumed by us upon closing of 

the Acquisition. Further, it is possible that undisclosed, contingent or other liabilities, problems or obligations may arise in the future of which we were 
previously unaware. These disclosed and undisclosed liabilities could have an adverse effect on our business, financial condition and results of operations.

Any or all of these factors could decrease or delay the expected accretive effect of the Acquisition and negatively impact our stock price. As a result, 

it cannot be assured that we will be successful in the integration of AavantiBio with our business or that we will realize the benefits anticipated from the 
Acquisition or in the anticipated time frames or at all.

Our stockholders may not realize a benefit from the Acquisition and the related private placement commensurate with the ownership dilution they 
experienced in connection with the Acquisition and the related private placement.

If we are unable to realize the full strategic and financial benefits anticipated from the Acquisition, our stockholders will have experienced 

substantial dilution of their ownership interests without receiving any commensurate benefit, or only 

32

 
receiving part of the commensurate benefit to the extent the combined company is able to realize only part of the benefits anticipated from the Acquisition 
and the related private placement.

We may be exposed to increased litigation, including stockholder litigation, which could have an adverse effect on our business and operations. 

We may be exposed to increased litigation from stockholders, customers, suppliers, consumers and other third parties due to the combination of 
Solid’s and AavantiBio’s businesses following the Acquisition. Such litigation may have an adverse impact on our business and results of operations or 
may cause disruptions to our operations. In addition, in the past, stockholders have initiated class action lawsuits against biotechnology companies 
following periods of volatility in the market prices of these companies’ stock. Such litigation, if instituted against us, could cause us to incur substantial 
costs and divert management’s attention and resources, which could have a material adverse effect on our business, financial condition and results of 
operations.

Risks related to our financial position and need for capital requirements

We have incurred significant net losses since inception and anticipate that we will continue to incur net losses for the foreseeable future and may never 
achieve or maintain profitability. 

Since inception, we have incurred significant net losses. Our net loss was $86.0 million for the year ended December 31, 2022. Our net losses were 
$72.2 million and $88.3 million for the years ended December 31, 2021 and 2020, respectively. As of December 31, 2022, we had an accumulated deficit 
of $562.7 million. To date, we have devoted substantially all of our efforts to research and development, including clinical development of our gene transfer 
candidate, SGT-001, which we are no longer developing, and preclinical development of our gene transfer candidate, SGT-003, as well as to building out 
our management team and infrastructure. Following the Acquisition, we began also devoting efforts to preclinical development of our FA and cardiac 
programs. We expect that it could be several years before we have a commercialized product, and we may never have a commercialized product. We expect 
to continue to incur significant expenses and see continued operating losses for the foreseeable future. We anticipate that our expenses will increase 
substantially if, and as, we:

•

•

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•

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•

•

•

•

•

•

move SGT-003, AVB-202-TT, AVB-401 or other future candidates into clinical trials;

continue research and preclinical development of SGT-003, AVB-202-TT, AVB-401 or other future candidates; 

seek to identify additional candidates;

seek marketing approvals for our product candidates that successfully complete clinical trials, if any;

establish a sales, marketing and distribution infrastructure to commercialize any products for which we may obtain marketing approval;

arrange for manufacture of larger quantities of our product candidates for clinical development and potential commercialization;

maintain, expand, protect and enforce our intellectual property portfolio;

hire and retain additional clinical, quality control and scientific personnel;

integrate employees of AavantiBio;

build out new facilities or expand existing facilities to support our activities;

acquire or in-license other drugs, drug candidates, technologies and intellectual property; 

fund a portion of the development or commercialization of products in collaboration with Ultragenyx pursuant to our collaboration and license 
agreement with Ultragenyx; and

add operational, financial and management information systems and personnel.

To become and remain profitable, we must develop and eventually commercialize one or more product candidates with significant market potential. 

This will require us to be successful in a range of challenging activities, and our expenses will increase substantially as we continue to monitor patients 
dosed in IGNITE DMD and complete preclinical studies and future clinical trials of SGT-003, AVB-202-TT, AVB-401 and other future candidates, obtain 
marketing approval for SGT-003, AVB-202-TT, AVB-401, or other future candidates, develop and validate commercial-scale manufacturing processes, 

33

 
manufacture, market and sell any future candidates for which we may obtain marketing approval and satisfy any post-marketing requirements. Moreover, 
the manufacturing process requires materials which may fluctuate in cost or be limited or unavailable to us, as well as relationships with contract 
development and manufacturing organizations to facilitate the manufacturing process. We may never succeed in any 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 would 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. A decline in the value of 
our company also could cause stockholders to lose all or part of their investment.

We will need additional funding, which may not be available on acceptable terms, or at all. Failure to obtain this necessary capital when needed may 
force us to delay, limit or terminate our product development efforts or other operations.

We expect our expenses to increase in connection with our ongoing activities, particularly as we continue the research and development of, conduct 
clinical trials of, and seek marketing approval for, SGT-003, AVB-202-TT, AVB-401 and other future candidates and otherwise integrate the operations of 
AavantiBio into our business. In addition, if we obtain marketing approval for SGT-003, AVB-202-TT, AVB-401 or other future candidates, we expect to 
incur significant expenses related to product sales, marketing, manufacturing and distribution. We also expect to continue to incur additional costs 
associated with operating as a public company. While we believe that our cash, cash equivalents and available-for-sale securities as of December 31, 2022, 
will be sufficient to fund our operating expenses and capital requirements into 2025, we have based this estimate on assumptions that may prove to be 
wrong, and we could use our available capital resources sooner than we currently anticipate. In order to continue to operate our business beyond that time, 
we will need to raise additional funds. However, there can be no assurance that we will be able to generate funds on terms acceptable to us, on a timely 
basis, or at all. In addition, we anticipate that we will need additional funding to complete the development of SGT-003, AVB-202-TT, AVB-401 and other 
future candidates. 

Our future capital requirements will depend on many factors, including:

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•

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•

•

•

•

•

•

the progress, costs and results of integrating AavantiBio operations into our business;

the results of future clinical trials of SGT-003, AVB-202-TT, AVB-401 and other future candidates;

the costs, timing and outcome of regulatory review of SGT-003, AVB-202-TT, AVB-401 and other future candidates;

the scope, progress, results and costs of discovery, laboratory testing, manufacturing, preclinical development and clinical trials for SGT-003, 
AVB-202-TT, AVB-401 and other future candidates that we may pursue in the future, if any;

the costs associated with our manufacturing process development and evaluation of third-party manufacturers;

the revenue, if any, received from commercial sale of SGT-003, AVB-202-TT, AVB-401 or other future candidates, should any of our future 
candidates receive marketing approval;

the costs of preparing, filing and prosecuting patent applications, maintaining, defending and enforcing our intellectual property rights and 
defending intellectual property-related claims;

the outcome of any lawsuits filed against us;

the terms of our current and any future license agreements and collaborations;

the success of our collaboration with Ultragenyx;

our ability to establish and maintain additional strategic collaborations, licensing or other arrangements and the financial terms of such 
arrangements;

the payment or receipt of milestones, royalties and other collaboration-based revenues, if any;

the extent to which we acquire or in-license other candidates, technologies and intellectual property; and 

if and as we need to adapt our business in response to the COVID-19 pandemic or other pandemics and collateral consequences related thereto. 

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Identifying potential product candidates and conducting preclinical testing 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 submit a new drug application, or NDA, or biologic 
license application, or BLA, or obtain marketing approval and achieve product sales. In addition, our product candidates, if approved, may not achieve 
commercial success. Our product revenue, if any, will be derived from or based on sales of product candidates that may not be commercially available for 
many years, if at all. 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, and may be impacted by the economic climate and market conditions. Our ability to 
raise additional funds may be adversely impacted by general economic conditions, both inside and outside the U.S., including disruptions to, and instability 
and volatility in, the credit and financial markets in the U.S. and worldwide, heightened inflation, interest rate and currency rate fluctuations, and economic 
slowdown or recession as well as concerns related to the COVID-19 pandemic and geopolitical events, including civil or political unrest. In addition, 
market instability and volatility, high levels of inflation and interest rate fluctuations may increase our cost of financing or restrict our access to potential 
sources of future liquidity. Alternatively, we may seek additional capital due to favorable market conditions or strategic considerations, even if we believe 
we have sufficient funds for our current or future operating plans.

Raising additional capital may cause dilution to our existing stockholders, restrict our operations or require us to relinquish rights to our technologies, 
SGT-001, SGT-003, AVB-202-TT, AVB-401 or our other future candidates.

We may seek additional capital through a combination of public and private equity offerings, debt financings, strategic partnerships and alliances 

and licensing arrangements. To the extent that we raise additional capital through the sale of equity or convertible debt securities, ownership of our 
common stock will be diluted and the terms may include liquidation or other preferences that adversely affect the rights of our current stockholders. The 
incurrence of indebtedness would result in increased fixed payment obligations and could involve restrictive covenants, such as limitations on our ability to 
incur additional debt, limitations on our ability to acquire or license intellectual property rights and other operating restrictions that could adversely impact 
our ability to conduct our business. If we raise additional funds through strategic partnerships and alliances and licensing arrangements with third parties, 
we may have to relinquish valuable rights to our technologies, SGT-001, SGT-003, AVB-202-TT, AVB-401 or other future candidates, or grant licenses on 
terms unfavorable to us.

We have never generated revenue from product sales and do not expect to do so for the foreseeable future, if ever.

Our ability to generate revenue from product sales and achieve profitability depends on our ability, alone or with collaborative partners, to 

successfully complete the development of, and obtain the regulatory approvals necessary to commercialize, SGT-003, AVB-202-TT, AVB-401 and other 
future candidates that we may pursue in the future. We do not anticipate generating revenue from product sales for the foreseeable future, if ever. Our 
ability to generate future revenue from product sales depends heavily on our success in:

•

•

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•

•

•

•

•

completing research and development of SGT-003, AVB-202-TT, AVB-401 and other future candidates in a timely and successful manner; 

seeking and obtaining regulatory and marketing approvals for any candidates for which we complete clinical trials;

launching and commercializing SGT-003, AVB-202-TT, AVB-401 and other future candidates for which we obtain regulatory and marketing 
approval by establishing a sales force and marketing and distribution infrastructure or, alternatively, collaborating with a commercialization 
partner; 

maintaining and enhancing a commercially viable, sustainable, scalable, reproducible and transferable manufacturing processes for SGT-003, 
AVB-202-TT, AVB-401 and other future candidates that is compliant with cGMPs; 

establishing and maintaining supply and manufacturing relationships with third parties that can provide adequate, in both amount and quality, 
products and services to support clinical development and the commercial demand for SGT-003, AVB-202-TT, AVB-401 and other future 
candidates, if approved; 

obtaining market acceptance, if and when approved, of SGT-003, AVB-202-TT, AVB-401 or other future candidates as a viable treatment 
option by patients, the medical community and third-party payors; 

qualifying for coverage and adequate reimbursement by government and third-party payors for SGT-003, AVB-202-TT, AVB-401 and other 
future candidates both in the U.S. and internationally; 

effectively addressing any competing technological and market developments; 

35

 
•

•

•

•

•

negotiating favorable terms in any collaboration, licensing or other arrangements into which we may enter and performing our obligations 
under such arrangements; 

maintaining, protecting, enforcing and expanding our portfolio of intellectual property rights, including patents, trademarks, trade secrets and 
know-how; 

avoiding and defending against intellectual property infringement, misappropriation and other claims; 

implementing additional internal systems and infrastructure, as needed; and 

attracting, hiring and retaining qualified personnel.

Our limited operating history may make it difficult for our stockholders to evaluate the success of our business to date and to assess our future viability.

We are a development-stage company founded in 2013. Our operations to date, with respect to the development of SGT-001, SGT-003 and other 

potential candidates, have been limited to organizing and staffing our company, business planning, raising capital, acquiring rights to our technology, 
identifying SGT-001 and SGT-003 as potential gene transfer candidates and undertaking preclinical studies of SGT-001 and SGT-003 and a clinical trial of 
SGT-001 and establishing research and development and manufacturing collaborations. Following the Acquisition, we have expanded our operations to 
include the development of AVB-202-TT and AVB-401. We have not yet demonstrated the ability to complete clinical trials of any product candidate, 
obtain marketing approvals, manufacture at commercial-scale or conduct sales and marketing activities necessary for successful commercialization. 
Consequently, any predictions our stockholders make about our prospects may not be as accurate as they could be if we had a longer operating history or 
prior experience integrating acquired businesses into our existing business.

The COVID-19 pandemic or other pandemics may affect our ability to initiate and complete current or future preclinical studies or clinical trials, 
disrupt regulatory activities, disrupt our manufacturing and supply chain or have other adverse effects on our business and operations. In addition, this 
pandemic may continue to adversely impact economies worldwide, which could result in adverse effects on our business and operations.

The COVID-19 pandemic has caused many governments to implement measures to slow the spread of the outbreak through quarantines, travel 

restrictions, heightened border scrutiny, and other measures. The outbreak and government measures taken in response have also had a significant impact, 
both direct and indirect, on businesses and commerce, as worker shortages have occurred; supply chains have been disrupted; facilities and production have 
been suspended; and demand for certain goods and services, such as medical services and supplies, has spiked, while demand for other goods and services, 
such as travel, has fallen. The future progression of the outbreak and its effects on our business and operations are uncertain.

We and our third-party manufacturers for supply of drug product for our candidates, and prospective contract research organizations, or CROs, may 

face disruptions that may affect our ability to initiate and complete preclinical studies or clinical trials, including disruptions in procuring items that are 
essential for our research and development activities, including, for example, raw materials used in the manufacturing of drug product for our candidates, 
and laboratory supplies for our current and future preclinical studies and clinical trials, in each case, for which there may be shortages because of ongoing 
efforts to address the outbreak. We and our third-party manufacturers, and prospective CROs, may face disruptions related to future clinical trials arising 
from delays in IND-enabling studies, manufacturing disruptions, and the ability to obtain necessary institutional review board or other necessary site 
approvals, as well as other delays at clinical trial sites.

We may also face difficulties recruiting or enrolling patients for our clinical trials if patients are affected by the COVID-19 virus or are fearful of 
visiting or traveling to, or unable to travel to, clinical trial sites because of the outbreak. For example, we experienced a few missed or postponed patient 
visits in our IGNITE DMD trial due to site closures early in the COVID-19 pandemic.

The response to the COVID-19 pandemic may redirect resources with respect to regulatory and intellectual property matters in a way that would 
adversely impact our ability to progress regulatory approvals and protect our intellectual property. For example, the FDA has announced that in order to 
bring new therapies to patients sick with COVID-19 as quickly as possible, it has redeployed medical and regulatory staff from other areas to work on 
COVID-19 therapies. In addition, we may face impediments to regulatory meetings and approvals due to measures intended to limit in-person interactions.

We expect to continue to take actions as may be required or recommended by government authorities or as we determine are in the best interests of 

our employees, and other business partners in light of COVID-19. In the event of a 

36

 
continuation of shelter-in-place orders and/or other mandated local travel restrictions, our employees conducting research and development activities may 
not be able to access our research space, and our core activities may be significant limited or curtailed, possibly for an extended period of time.

The pandemic has caused significant disruptions in the financial markets, and may continue to cause such disruptions, which could impact our 
ability to raise additional funds through public offerings and may also impact the volatility of our stock price and trading in our stock. Moreover, it is 
possible the pandemic will significantly impact economies worldwide, which could result in adverse effects on our business and operations. We cannot be 
certain what the overall impact of the COVID-19 pandemic, including any variant strains of the COVID-19 virus, will be on our business and it has the 
potential to adversely affect our business, financial condition, results of operations and prospects.

Finally, in response to the COVID-19 pandemic, the FDA issued numerous guidance documents to govern and facilitate the study and development 

of biologic products during the pandemic. On January 30, 2023, the Biden Administration announced that it will end the public health emergency 
declarations related to COVID-19 on May 11, 2023. On January 31, 2023, the FDA indicated that it would soon issue a Federal Register notice describing 
how the termination of the public health emergency will impact the agency’s COVID-19 related guidances. At this point, it is unclear how, if at all, these 
developments will impact our efforts to develop and commercialize our product candidates.

Unfavorable global economic conditions could harm our business, financial condition or results of operations.

Our results of operations could be harmed by general conditions in the global economy and in the global financial markets. A severe or prolonged 

economic downturn, including the impact of increased interest rates and inflation (such as the recent rise in inflation in the United States), could result in a 
variety of risks to our business, including weakened demand for our product candidates and our ability to raise additional capital when needed on 
acceptable terms, if at all. A weak or declining economy could strain our manufacturers, possibly resulting in manufacturing disruption, or cause delays in 
payments for our services by third-party payors or our future collaborators. Any of the foregoing could harm our business and we cannot anticipate all of 
the ways in which the current economic climate and financial market conditions could harm our business.

We hold a portion of our cash and cash equivalents that we use to meet our working capital and operating expense needs in deposit accounts that could 
be adversely affected if the financial institutions holding such funds fail.

We hold a portion of our cash and cash equivalents that we use to meet our working capital and operating expense needs in deposit accounts at 
multiple financial institutions. The balance held in these accounts may exceed the Federal Deposit Insurance Corporation, or FDIC, standard deposit 
insurance limit of $250,000. If a financial institution in which we hold such funds fails or is subject to significant adverse conditions in the financial or 
credit markets, we could be subject to a risk of loss of all or a portion of such uninsured funds or be subject to a delay in accessing all or a portion of such 
uninsured funds. Any such loss or lack of access to these funds could adversely impact our short-term liquidity and ability to meet our operating expense 
obligations, including payroll obligations.

For example, on March 10, 2023, Silicon Valley Bank, or SVB, and Signature Bank, were closed by state regulators and the FDIC was appointed 

receiver for each bank. The FDIC created successor bridge banks and all deposits of SVB and Signature Bank were transferred to the bridge banks under a 
systemic risk exception approved by the United States Department of the Treasury, the Federal Reserve and the FDIC. If financial institutions in which we 
hold funds for working capital and operating expenses were to fail, we cannot provide any assurances that such governmental agencies would take action to 
protect our uninsured deposits or investments in a similar manner.

We also maintain investment accounts with other financial institutions in which we hold our investments and marketable securities and, if access to 

the funds we use for working capital and operating expenses is impaired, we may not be able to sell investments or transfer funds from our investment 
accounts to other operating accounts on a timely basis sufficient to meet our operating expense obligations.

37

 
Risks related to the development of our product candidates

Our gene transfer candidates are based on novel technology, which makes it difficult to predict the time and cost of development and of subsequently 
obtaining regulatory approval. To our knowledge, only a limited number of gene transfer products have been approved for commercialization in the 
United States and the European Union.

We have historically concentrated our research and development efforts on SGT-001 and SGT-003 for the treatment of Duchenne. Prior to the 

Acquisition, AavantiBio concentrated its research and development efforts on candidates for the treatment of FA and BAG3-mediated dilated 
cardiomyopathy. We have prioritized SGT-003 for the treatment of Duchenne, and we plan to prioritize AVB-202-TT for the treatment of FA and AVB-401 
for the treatment of BAG3-mediated dilated cardiomyopathy and our future success depends on our successful development of these and other future 
candidates. Our risk of failure is high. We have experienced with SGT-001, and may in the future experience with our other candidates, problems or delays 
in developing these and other future candidates. Any such problems or delays would cause unanticipated costs, and any development problems may not be 
solved. For example, we or another party may uncover a previously unknown risk associated with SGT-003, AVB-202-TT, AVB-401, the adeno-associated 
virus, or AAV, vector, construct toxicity or other issues that may be more problematic than we currently believe and this may prolong the period of 
observation required for obtaining, or result in the failure to obtain, regulatory approval or may necessitate additional clinical testing.

In addition, our ability to conduct and complete our preclinical development testing and studies is contingent on our ability to source animals and 

other supplies required for the conduct of such testing and studies. If we are unable to obtain all necessary animals and other supplies required for the 
conduct of our preclinical testing and studies, we may be unable to complete such preclinical development testing and studies in a timely manner or at all. 
For example, some of our IND-enabling toxicology and other studies require certain non-human primates, or NHPs, that may be imported from countries in 
which trade relation with the U.S. are or may become challenging or through vendors who may not be able to timely source certain NHPs or at all, which 
may impair our ability to complete preclinical development testing and studies to support IND or similar applications or delay submission of such 
applications. Additionally, we may fail to demonstrate adequate product candidate efficacy and/or safety as required by regulatory authorities. We may fail 
to access relevant, adequate, or necessary animal models, including genetic models of disease and non-human primates in particular, for use in such studies 
as requested by regulatory authorities. We may also experience substantial delays as a result of our reliance on CROs to conduct all animal model 
experimentation necessary to assess the efficacy and safety of our product candidates. Any of these factors may result in delays to candidate progression, 
inability to obtain regulatory approval, and/or substantial increases in candidate development costs.

In addition, the product specifications and the clinical trial requirements of the FDA, the European Commission, the European Medicines Agency, or 
the EMA, and other regulatory authorities and the criteria these regulators use to determine the safety and efficacy of a product candidate vary substantially 
according to the type, complexity, novelty and intended use and market of such product candidate. The regulatory approval process for novel product 
candidates such as ours is unclear and can be more expensive and take longer than for other, better known or more extensively studied product candidates. 
To our knowledge, only a limited number of gene transfer products have been approved for commercialization in the United States and the European 
Union. As a result, it is difficult to determine how long it will take or how much it will cost to obtain regulatory approvals for our gene transfer candidates 
in either the United States or the European Union, if at all. Approvals by the European Commission may not be indicative of what the FDA may require for 
approval and vice versa.

Our gene transfer candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval, limit 
their commercial potential or result in significant negative consequences following any potential marketing approval.

SGT-003, AVB-202-TT, AVB-401 have not yet been studied in human patients. During the conduct of clinical trials, patients may experience 

changes in their health, including illnesses, injuries, discomforts or a fatal outcome. Often, it is not possible to determine whether the product candidate 
being studied caused these conditions. For instance, we reported a serious adverse event in IGNITE DMD, which resulted in a clinical hold in November 
2019, which has since been resolved. In April 2021, a patient treated with SGT-001 in IGNITE DMD experienced a systemic inflammatory response 
classified as a serious adverse event and considered by the investigator to be drug related.

In addition, it is possible that as we test SGT-003, AVB-202-TT, AVB-401 or other future candidates in larger, longer and more extensive clinical 
programs, or as use of these candidates becomes more widespread if they receive regulatory approval, illnesses, injuries, discomforts and other adverse 
events that were observed in earlier clinical trials, as well as conditions that did not occur or went undetected in previous clinical trials, will be reported by 
subjects. Many times, side effects are only detectable after investigational products are tested in large-scale, Phase III clinical trials or, in some cases, after 
they are made available to patients on a commercial scale after approval. If additional clinical experience indicates that 

38

 
SGT-003, AVB-202-TT, AVB-401 or any other future candidate has side effects or causes serious or life-threatening side effects, the development of the 
candidate may fail or be delayed, or, if the candidate has received regulatory approval, such approval may be withdrawn.

There have been several significant adverse side effects in gene therapy treatments in the past, including reported cases of leukemia and death seen 
in other clinical trials using other vectors. The FDA convened the Cellular, Tissue, and Gene Therapies Advisory Committee in September 2021 to discuss 
toxicity risks of AAV based gene therapy products. Discussed risks included oncogenicity risks due to vector genome integration, hepatotoxicity, 
thrombotic microangiopathy, and neurotoxicity (especially related to dorsal root ganglion toxicity). While new recombinant vectors have been developed 
with the intent to reduce these side effects, gene therapy is still a relatively new approach to disease treatment and additional adverse side effects could 
develop. More recently, there have been reports of significant adverse side effects, including muscle weakness and myocarditis, in clinical trials of other 
gene therapy treatments for Duchenne that may be related to the type and location of the specific gene mutation causing the disease. One clinical trial 
sponsor reported the death, preceded by hypovolemia and cardiogenic shock, of a non-ambulatory trial Duchenne subject with advanced disease and 
cardiac dysfunction. There also is the potential risk of delayed adverse events following exposure to gene therapy products due to persistent biologic 
activity of the genetic material or other components of products used to carry the genetic material. Possible adverse side effects that may occur with 
treatment with gene therapy products include an immunologic reaction early after administration that could substantially limit the effectiveness of the 
treatment or represent safety risks for patients. Additionally, in previous clinical trials involving AAV vectors for gene therapy, some subjects experienced 
the development of a positive ELISPOT test associated with T-cell responses, which is of unclear clinical translatability. If T-cells are activated, the cellular 
immune response system may trigger the removal of transduced cells. If our gene transfer candidates demonstrate a similar effect or other undesirable side 
effects, we may decide or be required to halt or delay further clinical development of SGT-003, AVB-202-TT, AVB-401 or other future candidates 
involving AAV vectors for gene therapy.

For example, as part of our SGT-001 preclinical program, we performed necessary good laboratory practices, or GLP, toxicology studies to establish 
the overall safety profile of SGT-001 in wild-type mice and non-human primates, or NHPs. The data and our conclusions from these studies were included 
in our IND submission to the FDA. Systemic administration of SGT-001 was generally well tolerated in both species. We observed no evidence of test-
article-related toxicity for up to 13 weeks after systemic administration of SGT-001 in either species that would prevent us from initiating clinical trials. In 
the NHP study, test-article-related effects were self-limited, mild chemistry and hematology changes with no microscopic correlates at the end of the study. 
There was a transient and asymptomatic increase in liver function enzymes observed in NHPs starting on day 9, which returned to normal levels by day 21. 
We believe there were no other relevant test-article-related adverse events associated with SGT-001 administration in either GLP study. In the NHP 
toxicology study, a single animal from the high dose cohort was euthanized after it did not recover from an anesthetic procedure. We believe this event was 
attributed to procedural errors. However, AAV vector cannot be completely ruled out as a contributing factor to the toxicity that gave rise to the event.

Additional adverse side effects may be observed following administration of any AAV gene therapy, SGT-003 or other current or future candidates. 

For example, integration of AAV DNA into the host cell’s genome has been reported to occur. Not all contemplated AAV delivery systems have been 
validated in human clinical trials previously, such as AAV-SLB101, which is a novel capsid. If a delivery system does not meet the safety criteria or cannot 
provide the desired efficacy results, then we may be forced to suspend or terminate our development of SGT-003 or other current or future candidates. In 
addition, the relatively high anticipated dosing requirements for SGT-003 may amplify the risk of adverse side effects relating to the AAV vector. We, and 
others, have seen serious adverse events when administering high dose AAV vectors. The FDA convened the Cellular, Tissue, and Gene Therapies 
Advisory Committee in September 2021 to discuss toxicity risks of AAV based gene therapy products. Discussed risks included oncogenicity risks due to 
vector genome integration, hepatotoxicity, thrombotic microangiopathy, and neurotoxicity (especially related to dorsal root ganglion toxicity). If any such 
adverse side effects were to occur in the future and we are unable to demonstrate that they were not caused by the administration process or related 
procedures, the FDA, the European Commission, the EMA or other regulatory authorities could order us to cease further development of, or deny approval 
of, SGT-003 or any other future candidate for any or all targeted indications. Even if we are able to demonstrate that any serious adverse events are not 
product-related, such occurrences could affect patient recruitment or the ability of enrolled patients to complete the clinical trial. Patients will also create 
antibodies to the AAV vector and a second administration of gene transfer might not be safe or successful. 

Additionally, if SGT-003, AVB-202-TT, AVB-401 or other candidates receive marketing approval, the FDA could require us to adopt a Risk 
Evaluation and Mitigation Strategy, or REMS, to ensure that the benefits outweigh the risks, which may include, among other things, a medication guide 
outlining the risks of the product for distribution to patients and a communication plan to health care practitioners. Furthermore, if we or others later 
identify undesirable side effects caused by 

39

 
SGT-003, AVB-202-TT, AVB-401 or other future candidates, several potentially significant negative consequences could result, including:

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•

•

•

•

regulatory authorities may suspend or withdraw approvals of such a product candidate;

regulatory authorities may require additional warnings on the label;

we may be required to change the way a product candidate is administered or conduct additional clinical trials;

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

our reputation may suffer.

One of our clinical trials has been placed on clinical hold by the FDA in the past, and we cannot guarantee that similar events will not happen in 
future clinical trials for other candidates.

In November 2019, the FDA placed a clinical hold on SGT-001 following a serious adverse event in IGNITE DMD. The third patient in the 2E14 

vg/kg cohort of IGNITE DMD, dosed in late October 2019, experienced a serious adverse event deemed related to the study drug that was characterized by 
complement activation, thrombocytopenia, decrease in red blood cell count, acute kidney injury, and cardio-pulmonary insufficiency. In October 2020, the 
FDA lifted the clinical hold placed on IGNITE DMD. In connection with the lifting of the clinical hold, we determined to reduce the maximum weight of 
the next two patients dosed in IGNITE DMD to 18 kg per patient. Additionally, to mitigate the risk of serious drug-related adverse events, we amended the 
IGNITE DMD clinical protocol to include the prophylactic use of both anti-complement inhibitor eculizumab and C1 esterase inhibitor, and increase the 
prednisone dose in the first month post dosing. In March 2021, we announced that a seventh patient was safely dosed under the amended protocol, with 
transient and manageable adverse events, none of which were serious. In April 2021, an eighth patient was treated with SGT-001. The patient experienced a 
systemic inflammatory response which has since fully resolved. The event was classified as a serious adverse event and considered by the investigator to be 
drug related. This type of event is described in our Investigators Brochure and is not considered unexpected. Following dosing of these two patients with 
our second-generation manufacturing process and clinical strategy, we conducted an extensive review of all clinical data, which resulted in a strengthened 
risk mitigation plan including new patient management guidance. In November 2021, a ninth patient was safely dosed under the amended clinical protocol, 
with transient and manageable adverse events, none of which were serious. However, we cannot guarantee that similar serious adverse events or clinical 
holds will not happen in future clinical trials. 

Delays in the completion of any clinical trial of SGT-003, AVB-202-TT, AVB-401 or any other future candidate, as a result of similar serious 

adverse events or clinical holds or otherwise, will increase our costs, slow down our product candidate development and approval process and delay or 
potentially jeopardize our ability to commence product sales and generate revenue. In addition, many of the factors that cause, or lead to, a delay in the 
commencement or completion of clinical trials may also ultimately lead to the denial of regulatory approval of SGT-003, AVB-202-TT, AVB-401 or other 
future candidates.

We have never completed a clinical trial and may be unable to do so for any product candidates we may develop, including SGT-003, AVB-202-TT and 
AVB-401.

We are very early in our development efforts, and all of our candidates are still in preclinical development.  Preclinical studies involve a lengthy and 

expensive process with an uncertain outcome.  There are many potential preclinical models to test for different disease states, and we could fail to choose 
the best or a predictive preclinical model to determine proof of concept and potential safety and efficacy of our candidates.  We may decide to suspend 
further testing on our candidates or technologies if, in the judgment of our management and advisors, the preclinical test results do not support further 
development.

 We will need to successfully initiate and complete clinical trials in order to obtain FDA approval to market SGT-003, AVB-202-TT, AVB-401 or 

other future candidates. We have limited experience in preparing, submitting and prosecuting regulatory submissions, and have not previously submitted a 
BLA for any product candidate. We cannot be sure that submission of an IND, including the IND we plan to submit for SGT-003 in the second half of 
2023, will result in the FDA allowing clinical trials to begin or to begin as proposed, or that, once begun, issues will not arise that suspend or terminate 
such clinical trials. Carrying out later-stage clinical trials and the submission of a successful BLA is a complicated process. This may be particularly true 
for design of a pivotal trial for the treatment of Duchenne as the FDA has not given clear guidance as to the necessary endpoints for approval of a treatment 
for Duchenne. In addition, we cannot be certain how many clinical trials of SGT-003, AVB-202-TT, AVB-401 or other future candidates will be required or 
how such trials should be designed. Consequently, we may be unable to successfully and efficiently execute and complete necessary clinical trials in a 

40

 
way that leads to BLA submission and approval of SGT-003, AVB-202-TT, AVB-401 or other future candidates. We may require more time and incur 
greater costs than our competitors and may not succeed in obtaining regulatory approvals of product candidates that we develop. Failure to commence or 
complete, or delays in, clinical trials, could prevent us from or delay us in commercializing SGT-003, AVB-202-TT, AVB-401 and other future candidates.

Success in preclinical studies or early clinical trials may not be indicative of results obtained in later trials.

Results from preclinical studies or early clinical trials are not necessarily predictive of future clinical trial results and are not necessarily indicative 

of final results. Our preclinical studies for SGT-003 and AVB-202-TT in animals have been limited. We have only dosed a limited number of human 
subjects with SGT-001, and we have not dosed any human subjects with SGT-003, AVB-202-TT or AVB-401. There is a high failure rate for gene therapy 
and biologic products proceeding through clinical trials. Many companies in the pharmaceutical and biotechnology industries have suffered significant 
setbacks in late-stage clinical trials even after achieving promising results in preclinical testing and earlier-stage clinical trials. Data obtained from 
preclinical and clinical activities are subject to varying interpretations, which may delay, limit or prevent regulatory approval. We also may experience 
regulatory delays or rejections as a result of many factors, including due to changes in regulatory policy during the period of our product candidate 
development. SGT-003, AVB-202-TT, AVB-401 or other future candidates may fail to show the desired safety and efficacy in clinical development despite 
positive results in preclinical studies. This failure could cause us to abandon SGT-003, AVB-202-TT, AVB-401 or other future candidates.

Preliminary or interim data that we announce or publish from time to time may change as more data become available and are subject to audit and 
verification procedures that could result in material changes in the final data.

From time to time, we may announce or publish preliminary or interim data from clinical trials. Positive preliminary or interim data may not be 

predictive of such trial’s subsequent or overall results. Preliminary or interim data are subject to the risk that one or more of the outcomes may materially 
change as more data become available. Additionally, preliminary or interim data are subject to the risk that one or more of the clinical outcomes may 
materially change as patient enrollment continues and more patient data become available. Therefore, positive preliminary or interim data in any ongoing 
clinical trial may not be predictive of such results in the completed trial. We also make assumptions, estimations, calculations and conclusions as part of our 
analyses of data, and we may not have received or had the opportunity to fully evaluate all data. As a result, preliminary or interim data that we report may 
differ from future results from the same clinical trials, or different conclusions or considerations may qualify such results, once additional data have been 
received and fully evaluated. Preliminary or interim data also remain subject to audit and verification procedures that may result in the final data being 
materially different from the preliminary or interim data we previously published. As a result, preliminary or interim data should be viewed with caution 
until the final data are available. Material adverse changes in the final data compared to preliminary or interim data could significantly harm our business 
prospects.

We may encounter substantial delays in our clinical trials or we may fail to demonstrate safety and efficacy to the satisfaction of applicable regulatory 
authorities.

Before obtaining marketing approval from regulatory authorities for the sale of SGT-003, AVB-202-TT, AVB-401 or other future candidates, we 

must conduct extensive clinical trials to demonstrate the safety and efficacy of the product candidate for its intended indications. Clinical testing is 
expensive, time-consuming and uncertain as to outcome. We cannot guarantee that any clinical trials will be conducted as planned or completed on 
schedule, if at all. A failure of one or more clinical trials can occur at any stage of testing. Events that may prevent successful or timely completion of 
clinical development include:

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delays in obtaining animals in sufficient quantities to run our preclinical studies;

delays in reaching a consensus with regulatory authorities on trial design;

delays in reaching agreement with the appropriate external parties on dose escalation;

delays in enrolling patients in clinical trials; 

delays in reaching agreement on acceptable terms with prospective CROs and clinical trial sites;

delays in opening clinical trial sites or obtaining required IRB or independent ethics committee approval at each clinical trial site;

delays in recruiting suitable subjects to participate in our clinical trials, including because such trials may be placebo-controlled trials and 
patients are not guaranteed to receive treatment with our product candidates;

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•

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difficulty in finding suitable animal models to demonstrate a disease specific phenotype;

failure by us, any CROs we engage or any other third parties to adhere to clinical trial requirements; 

failure to perform in accordance with FDA good clinical practices, or GCPs, or applicable regulatory guidelines in the European Union and 
other countries;

delays in the testing, validation, manufacturing and delivery of SGT-003, AVB-202-TT, AVB-401 or other future product candidates to the 
clinical sites, including delays by third parties with whom we have contracted to perform certain of those functions;

delays in subjects completing participation in a trial or returning for post-treatment follow-up;

clinical trial sites or subjects dropping out of a trial;

selection of clinical endpoints that require prolonged periods of clinical observation or analysis of the resulting data;

imposition of a clinical hold by regulatory authorities as a result of a serious adverse event, after an inspection of our clinical trial operations, 
trial sites or manufacturing facilities or otherwise;

occurrence of serious adverse events in trials of the same class of agents conducted by other sponsors; 

delays as a result of the COVID-19 pandemic or from the outbreak of another pandemic or contagious disease or other global instability could 
delay the initiation or rate of completion of any clinical trial; or

changes in regulatory requirements and guidance that require amending or submitting new clinical protocols.

Additionally, if the results of any clinical trials are inconclusive or if there are safety concerns or serious adverse events associated with SGT-003, 

AVB-202-TT, AVB-401 or other future candidates, we may:

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be delayed or fail in obtaining marketing approval for SGT-003, AVB-202-TT, AVB-401 or other future candidates;

obtain approval for indications or patient populations that are not as broad as we intended or desired;

obtain approval with labeling that includes significant use or distribution restrictions or safety warnings;

be subject to changes in the way our products, if approved, are administered;

be required to perform additional clinical trials to support approval or be subject to additional post-marketing testing requirements;

have regulatory authorities withdraw, or suspend, their approval of the product or impose restrictions on its distribution in the form of a 
modified REMS;

be sued and held liable for harm caused to patients; or

experience damage to our reputation.

In addition, the FDA’s and other regulatory authorities’ policies with respect to clinical trials may change and additional government regulations 

may be enacted.  If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies governing clinical 
trials, our development plans may be impacted. For example, in December 2022, with the passage of Food and Drug Omnibus Reform Act, or FDORA, 
Congress required sponsors to develop and submit a diversity action plan for each Phase 3 clinical trial or any other “pivotal study” of a new drug or 
biological product.  Similarly, the regulatory landscape related to clinical trials in the EU recently evolved. If we are not able to adapt to these and other 
changes in existing requirements or the adoption of new requirements or policies governing clinical trials, our development plans may be impacted.

Our product development costs will increase if we experience delays in testing or marketing approvals. In addition, if we make manufacturing or 
other changes to SGT-003, AVB-202-TT, AVB-401 or other future candidates, we may need to conduct additional studies to bridge our modified product 
candidates to earlier versions. We do not know whether any of our preclinical studies or clinical trials will begin as planned, will need to be restructured or 
will be completed on schedule, or at all. We may also determine to change the design or protocol of one or more of our clinical trials, which we have done 
in the past and which could result in delays. Significant preclinical study or clinical trial delays also could shorten any periods during which we may have 
the exclusive right to commercialize our product candidates or allow our competitors to bring products to market before we do and impair our ability to 
successfully commercialize our product candidates.

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If our third-party clinical trial vendors fail to comply with strict regulations, any clinical trials for SGT-003, AVB-202-TT, AVB-401 or other future 
candidates may be delayed or unsuccessful.

We do not have the personnel capacity to conduct or manage the clinical trials that will be necessary for the development of SGT-003, AVB-202-TT, 
AVB-401 or other future candidates. For IGNITE DMD we are relying, and for any future clinical trials we expect we will rely, on third parties to assist us 
in managing, monitoring and conducting our clinical trials. If these third parties fail to comply with applicable regulations or do not adequately fulfill their 
obligations under the terms of our agreements with them, we may not be able to enter into alternative arrangements without undue delay or additional 
expenditures and, therefore, the clinical trials for SGT-003 or other current and future product candidates may be delayed or unsuccessful.

Furthermore, the FDA can be expected to inspect some or all of the clinical sites participating in our clinical trials to determine if our clinical trials 

are being conducted according to GCPs. If the FDA determines that these clinical sites are not in compliance with applicable regulations, we may be 
required to delay, repeat or terminate the clinical trials.

We may find it difficult to enroll patients in our clinical trials, which could delay or prevent us from proceeding with clinical trials of SGT-003, AVB-
202-TT, AVB-401 or other future candidates.

Identifying and qualifying patients to participate in any clinical trials of SGT-003, AVB-202-TT, AVB-401 and other future candidates are critical to 

our success. Because of our primary focus on rare diseases, we may have difficulty enrolling a sufficient number of eligible patients. The timing of any 
clinical trials depends on our ability to recruit patients to participate as well as complete required follow-up periods. If patients are unwilling or unable to 
participate in our gene therapy clinical trials, including because of negative publicity from adverse events related to our candidates, other approved gene 
therapies or the biotechnology or gene therapy fields, or due to competitive clinical trials or approvals for similar patient populations, clinical trials in 
products employing our vector or our platform or for other reasons, the timeline for recruiting patients, conducting clinical trials and obtaining regulatory 
approval of SGT-003, AVB-202-TT, AVB-401 or our other candidates may be delayed. We may also experience delays if patients withdraw from the 
clinical trial or do not complete the required monitoring period. Furthermore, we may face difficulties in recruiting patients to enroll in, or once enrolled, 
retaining patients in future clinical trials if they or their caretakers are affected by the COVID-19 virus or are fearful of traveling to, or are unable to travel 
to, our clinical trial sites because of the COVID-19 pandemic or other unforeseen events. These delays could result in increased costs, delays in advancing 
SGT-003, AVB-202-TT, AVB-401 or other future candidates, delays in testing the effectiveness of SGT-003, AVB-202-TT, AVB-401 and other future 
candidates or termination of clinical trials altogether. 

We may not be able to identify, recruit and enroll a sufficient number of patients, or those with required or desired characteristics, to complete any 

clinical trials in a timely manner. Patient enrollment and trial completion is affected by many factors, including:

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size of the patient population and the process for identifying subjects;

design of the trial protocol;

eligibility and exclusion criteria, including that some patients may have pre-existing antibodies to AAV vectors precluding them from being 
able to receive AAV-mediated gene transfer;

restrictions on our ability to conduct clinical trials, including full and partial clinical holds on ongoing or planned clinical trials;

perceived risks and benefits of the product candidate under study;

perceived risks and benefits of gene therapy-based approaches to the treatment of diseases;

release or disclosure of data from our completed or ongoing clinical trials;

availability of competing therapies and clinical trials;

severity of the disease;

proximity and availability of clinical trial sites for prospective subjects;

ability to obtain and maintain subject consent;

risk that enrolled subjects will drop out before completion of the trial;

patient referral practices of physicians;

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ability to monitor subjects adequately during and after treatment; and

in the case of pivotal trials, the risk that patients may opt not to enroll because they are not assured treatment with our product candidate.

Our ability to successfully initiate, enroll and complete a clinical trial in any foreign country is subject to numerous risks unique to conducting 

business in foreign countries, including:

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different standards for the conduct of clinical trials;

absence in some countries of established groups with sufficient regulatory expertise for review of gene therapy protocols;

difficulty in identifying and partnering with qualified local consultants, physicians and partners; and

the potential burden of complying with a variety of foreign laws, medical standards and regulatory requirements, including the regulation of 
pharmaceutical and biotechnology research and products.

Even if we complete the necessary clinical trials, we cannot predict when, or if, we will obtain regulatory approval to commercialize SGT-003, AVB-
202-TT, AVB-401 or other future candidates and the approval may be for a more narrow indication than we seek.

We cannot commercialize SGT-003, AVB-202-TT, AVB-401 or other future candidates until the appropriate regulatory authorities have reviewed 

and approved the product candidate. The process of obtaining regulatory approvals and the subsequent compliance with appropriate federal, state and local 
statutes and regulations require the expenditure of substantial time and financial resources and we may not be able to obtain the required regulatory 
approvals. Even if our product candidates meet their safety and efficacy endpoints in clinical trials, the regulatory authorities may not complete their review 
processes in a timely manner, or we may not be able to obtain regulatory approval. Additional delays may result if an FDA advisory committee or other 
regulatory authority recommends non-approval or restrictions on approval. In addition, we may experience delays or rejections based upon additional 
government regulation from future legislation or administrative action or changes in regulatory authority policy during the period of product development, 
clinical trials and the regulatory review process.

Even if we receive regulatory approval, regulatory authorities may approve a product candidate for more limited indications than requested or they 

may impose significant limitations in the form of narrow indications, warnings or a REMS. Regulatory authorities may require precautions or contra-
indications with respect to conditions of use or they may grant approval subject to the performance of costly post-marketing clinical trials. In addition, 
regulatory authorities may not approve the labeling claims that are necessary or desirable for the successful commercialization of our product candidates. 
Any of the foregoing scenarios could materially harm the commercial prospects for our product candidates. 

Even if we obtain regulatory approval for a product candidate, our product candidates will remain subject to regulatory oversight.

Even if we obtain any regulatory approval for SGT-003, AVB-202-TT, AVB-401 or other future candidates, we will be subject to ongoing regulatory 

requirements for manufacturing, labeling, packaging, storage, advertising, promotion, sampling, record-keeping and submission of safety and other post-
market information. Any regulatory approvals that we receive for our product candidates may also be subject to a REMS, limitations on the approved 
indicated uses for which the product may be marketed or conditions of approval, or requirements for potentially costly post-marketing testing, including 
Phase IV clinical trials, and surveillance to monitor the quality, safety and efficacy of the product. Advertising and promotional materials must comply with 
FDA rules and are subject to FDA review, in addition to other potentially applicable federal and state laws.

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In addition, later discovery of previously unknown adverse events or other problems with our products, manufacturers or manufacturing processes, 

or failure to comply with regulatory requirements, may have various consequences, including: 

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restrictions on such products, manufacturers or manufacturing processes; 

restrictions and warnings on the labeling or marketing of a product; 

restrictions on product distribution or use; 

requirements to conduct post-marketing studies or clinical trials; 

warning letters or untitled letters; 

withdrawal of the products from the market; 

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

recall of products; 

fines, restitution or disgorgement of profits or revenues; 

suspension or withdrawal of marketing approvals; 

damage to relationships with any potential collaborators; 

unfavorable press coverage and damage to our reputation; 

refusal to permit the import or export of our products; 

product seizure; 

injunctions or the imposition of civil or criminal penalties; or 

litigation involving patients using our products.  

In addition, manufacturers of approved products and those manufacturers’ facilities are required to comply with extensive FDA requirements, 

including ensuring that quality control and manufacturing procedures conform to cGMPs applicable to drug manufacturers or quality assurance standards 
applicable to medical device manufacturers, which include requirements relating to quality control and quality assurance as well as the corresponding 
maintenance of records and documentation and reporting requirements. We, any contract manufacturers we may engage in the future, our future 
collaborators and their contract manufacturers will also be subject to other regulatory requirements, including submissions of safety and other post-
marketing information and reports, registration and listing requirements, requirements regarding the distribution of samples to clinicians, recordkeeping, 
and costly post-marketing studies or clinical trials and surveillance to monitor the safety or efficacy of the product such as the requirement to implement a 
REMS.

Non-compliance with European Union requirements regarding safety monitoring or pharmacovigilance, and with requirements related to the 
development of products for the pediatric population, can also result in significant financial penalties. Similarly, failure to comply with the European 
Union’s requirements regarding the protection of personal information can also lead to significant penalties and sanctions. Further, similar restrictions apply 
to approved products in the EU. The holder of a marketing authorization is required to comply with a range of requirements applicable to the 
manufacturing, marketing, promotion and sale of medicinal products. These include: compliance with the EU’s stringent pharmacovigilance or safety 
reporting rules, which can impose post-authorization studies and additional monitoring obligations; the manufacturing of authorized medicinal products, for 
which a separate manufacturer’s license is mandatory; and the marketing and promotion of authorized drugs, which are strictly regulated in the EU and are 
also subject to EU Member State laws.

Accordingly, assuming we, or our collaborators, receive marketing approval for one or more of our product candidates, we, and our collaborators, 
and our and their contract manufacturers will continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, 
production, product surveillance and quality control. If we, and our collaborators, are not able to comply with post-approval regulatory requirements, our or 
our collaborators’ ability to market any future products could be limited, which could adversely affect our ability to achieve or sustain profitability. Further, 
the cost of compliance with post-approval regulations may have a negative effect on our operating results and financial condition.

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Even if we obtain and maintain approval for SGT-003, AVB-202-TT, AVB-401 or other future candidates from the FDA, we may never obtain approval 
for our product candidates outside of the United States, which would limit our market opportunities and adversely affect our business.

Even if we receive FDA approval of SGT-003, AVB-202-TT, AVB-401 or other future candidates in the United States, approval of a product 
candidate in the United States by the FDA does not ensure approval of such product candidate by regulatory authorities in other countries or jurisdictions, 
and approval by one foreign regulatory authority does not ensure approval by regulatory authorities in other foreign countries or by the FDA. Future sales 
of our product candidates outside of the United States will be subject to foreign regulatory requirements governing clinical trials, manufacturing and 
marketing approval. Approval procedures vary among jurisdictions and can involve requirements and administrative review periods different from, and 
more onerous than, those in the United States, including additional preclinical studies or clinical trials. In many countries outside the United States, a 
product candidate must be approved for reimbursement before it can be approved for sale in that country. We intend to submit a marketing authorization 
application, or MAA, to the EMA for approval of SGT-003 in the European Union, but obtaining such approval from the European Commission following 
the opinion of the EMA is a lengthy and expensive process. Regulatory authorities in countries outside of the United States and the European Union also 
have requirements for approval of product candidates with which we must comply prior to marketing in those countries. Obtaining 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 SGT-003, AVB-202-TT, AVB-401 or other future product candidates in certain countries.

Further, clinical trials conducted in one country may not be accepted by regulatory authorities in other countries. Also, regulatory approval for SGT-
003, AVB-202-TT, AVB-401 or other future product candidates may be withdrawn. If we fail to comply with the regulatory requirements, our target market 
will be reduced, and our ability to realize the full market potential of our product candidates will be harmed.

Additionally, we could face heightened risks with respect to seeking marketing approval in the United Kingdom as a result of Brexit. The United 

Kingdom is no longer part of the European Single Market and European Union Customs Union.  As of January 1, 2021, the Medicines and Healthcare 
products Regulatory Agency, or the MHRA, became responsible for supervising medicines and medical devices in Great Britain, comprising England, 
Scotland and Wales under domestic law, whereas Northern Ireland will continue to be subject to European Union rules under the Northern Ireland Protocol. 
Any delay in obtaining, or an inability to obtain, any marketing approvals, as a result of Brexit or otherwise, may prevent us from commercializing any 
product candidates in the United Kingdom and/or the EU and may force us to restrict or delay efforts to seek regulatory approval in the United Kingdom 
for our product candidates, which could significantly and materially harm our business.

Since a significant proportion of the regulatory framework for pharmaceutical products in the U.K. covering the quality, safety, and efficacy of 

pharmaceutical products, clinical trials, marketing authorization, commercial sales, and distribution of pharmaceutical products is derived from EU 
directives and regulations, Brexit may have a material impact upon the regulatory regime with respect to the development, manufacture, importation, 
approval and commercialization of our product candidates in the U.K. For example, the U.K. is no longer covered by the centralized procedures for 
obtaining EU-wide marketing authorization from the EMA, and a separate marketing authorization will be required to market our product candidates in the 
U.K.

Regulatory requirements governing gene therapy products are periodically updated and may continue to change in the future.

Regulatory requirements governing gene therapy products have changed frequently and will likely continue to change in the future. Moreover, there 

is substantial, and sometimes uncoordinated, overlap in those responsible for regulation of gene therapy products. For example, in the United States, the 
FDA has established the Office of Therapeutic Products within the Center for Biologics Evaluation and Research, or the CBER, to consolidate the review 
of gene therapy and related products, and the Cellular, Tissue and Gene Therapies Advisory Committee to advise CBER on its review. Gene therapy 
clinical trials may also be subject to review and oversight by an institutional biosafety committee, a local institutional committee that reviews and oversees 
basic and clinical research conducted at the institution participating in the clinical trial. Although the FDA decides whether individual gene therapy 
protocols may proceed, the review process and determinations of other reviewing bodies can impede or delay the initiation of a clinical trial, even if the 
FDA has reviewed the trial and approved its initiation. 

The FDA has issued various guidance documents regarding gene therapies, including final guidance documents released in January 2020 relating to 
chemistry, manufacturing and controls information for gene therapy INDs, gene therapies for rare diseases and gene therapies for retinal disorders, as well 
as final guidance in October 2022 for Human Gene Therapy for Neurodegenerative Diseases. Although the FDA has indicated that these and other 
guidance documents it previously 

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issued are not legally binding, we believe that our compliance with them is likely necessary to gain approval for any gene therapy product candidate we 
may develop. The guidance documents provide additional factors that the FDA will consider at each of the above stages of development and relate to, 
among other things, the proper preclinical assessment of gene therapies; the chemistry, manufacturing, and control information that should be included in 
an IND application; the proper design of tests to measure product potency in support of an IND or BLA application; and measures to observe delayed 
adverse effects in subjects who have been exposed to investigational gene therapies when the risk of such effects is high. Further, for AAV vectors 
specifically, the FDA typically recommends that sponsors continue to monitor participants for potential gene therapy-related adverse events for up to a 5-
year period. Other types of gene therapy or gene editing products may require longer follow up, potentially up to a maximum 15-year period.

Similarly, the EMA may issue new guidelines concerning the development and marketing authorization for gene therapy products and require that 
we comply with these new guidelines. The grant of marketing authorization in the European Union for gene therapy products is governed by Regulation 
1394/2007/EC on advanced therapy medicinal products, read in combination with Directive 2001/83/EC of the European Parliament and of the Council, 
commonly known as the Community code on medicinal products. Regulation 1394/2007/EC includes specific rules concerning the authorization, 
supervision, and pharmacovigilance of gene therapy medicinal products. Manufacturers of advanced therapy medicinal products must demonstrate the 
quality, safety, and efficacy of their products to the EMA, which provides an opinion regarding the MAA. The European Commission grants or refuses 
marketing authorization in light of the opinion delivered by the EMA.

Finally, ethical, social and legal concerns about gene therapy, genetic testing and genetic research could result in additional regulations or 
prohibiting the processes we may use. Federal and state agencies, congressional committees and foreign governments have expressed their intentions to 
further regulate biotechnology. More restrictive regulations or claims that our product candidates are unsafe or pose a hazard could prevent us from 
commercializing any products. New government requirements may be established that could delay or prevent regulatory approval of our product candidates 
under development. It is impossible to predict whether legislative changes will be enacted, regulations, policies or guidance changed, or interpretations by 
agencies or courts changed, or what the impact of such changes, if any, may be.

As we advance our product candidates through clinical development, we will be required to consult with these regulatory and advisory groups, and 

comply with applicable guidelines. These regulatory review committees and advisory groups and any new guidelines they promulgate may lengthen the 
regulatory review process, require us to perform additional studies, increase our development costs, lead to changes in regulatory positions and 
interpretations, delay or prevent approval and commercialization of SGT-003, AVB-202-TT, AVB-401 or other future product candidates or lead to 
significant post-approval limitations or restrictions. Delay or failure to obtain, or unexpected costs in obtaining, the regulatory approval necessary to bring a 
potential product to market could decrease our ability to generate sufficient product revenue.

We may not be able to obtain orphan drug exclusivity for one or more of our product candidates, and even if we do, that exclusivity may not prevent the 
FDA or the EMA from approving other competing products.

Under the Orphan Drug Act, the FDA may designate a product candidate as an orphan drug if it is a drug or biologic intended to treat a rare disease 
or condition. A similar regulatory scheme governs approval of orphan products by the EMA in the European Union. Generally, if a product candidate with 
an orphan drug designation subsequently receives the first marketing approval for the indication for which it has such designation, the product is entitled to 
a period of marketing exclusivity, which precludes the FDA or the EMA from approving another marketing application for a similar product for the same 
therapeutic indication for that time period. The applicable period is seven years in the United States and ten years in the European Union. The exclusivity 
period in the European Union can be reduced to six years if a product no longer meets the criteria for orphan drug designation, in particular if the product is 
sufficiently profitable so that market exclusivity is no longer justified.

In order for the FDA to grant orphan drug exclusivity to one of our products, the FDA must find that the product is indicated for the treatment of a 

condition or disease with a patient population of fewer than 200,000 individuals annually in the United States. The FDA may conclude that the condition or 
disease for which orphan drug exclusivity is sought does not meet this standard. Even if we obtain orphan drug exclusivity for a product, that exclusivity 
may not effectively protect the product from competition because different products can be approved for the same condition.

In addition, even after an orphan drug is approved, the FDA can subsequently approve a similar product for the same condition if the FDA 
concludes that the later product is clinically superior in that it is shown to be safer, more effective or makes a major contribution to patient care. Orphan 
drug exclusivity may also be lost if the FDA or EMA determines that the request for designation was materially defective or if the manufacturer is unable 
to assure sufficient quantity of the product to meet the needs of the patients with the rare disease or condition.

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The FDA Reauthorization Act of 2017, or FDARA, requires that a drug sponsor demonstrate the clinical superiority of an orphan drug that is 

otherwise the same as a previously approved drug for the same rare disease in order to receive orphan drug exclusivity. FDARA reverses prior precedent 
holding that the Orphan Drug Act unambiguously requires that the FDA recognize the orphan exclusivity period regardless of a showing of clinical 
superiority.

The FDA and Congress may further reevaluate the Orphan Drug Act and its regulations and policies. This may be particularly true in light of a 

decision from the Court of Appeals for the 11th Circuit in September 2021 finding that, for the purpose of determining the scope of exclusivity, the term 
“same disease or condition” means the designated “rare disease or condition” and could not be interpreted by the FDA to mean the “indication or use.” 
Thus, the Court of Appeals concluded that orphan drug exclusivity applies to the entire designated disease or condition rather than the “indication or use.” 
Although there have been legislative proposals to overrule this decision, they have not been enacted into law. On January 23, 2023, FDA announced that, in 
matters beyond the scope of that court order, FDA will continue to apply its existing regulations tying orphan-drug exclusivity to the uses or indications for 
which the orphan drug was approved. We do not know if, when, or how the FDA or Congress may change the orphan drug regulations and policies in the 
future, and it is uncertain how any changes might affect our business. Depending on what changes the FDA or Congress may make to its orphan drug 
regulations and policies, our business could be adversely impacted.

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We may seek a breakthrough therapy designation for one or more of our product candidates, but we might not receive such designation, and even if we 
do, such designation may not lead to a faster development or regulatory review or approval process.

We may seek a breakthrough therapy designation for one or more of our product candidates; however, we cannot assure our stockholders that one or 

more of our product candidates will meet the criteria for that designation. A breakthrough therapy is defined as a therapy that is intended, alone or in 
combination with one or more other therapies, to treat a serious condition, and preliminary clinical evidence indicates that the therapy may demonstrate 
substantial improvement over existing therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in 
clinical development. For therapies and biologics that have been designated as breakthrough therapies, interaction and communication between the FDA 
and the sponsor of the trial can help to identify the most efficient path for clinical development while minimizing the number of patients placed in 
ineffective control regimens. Therapies designated as breakthrough therapies by the FDA may also be eligible for priority review if supported by clinical 
data at the time the new drug application is submitted to the FDA.

Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe that 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. Even if we receive 
breakthrough therapy designation, the receipt of such designation for a product candidate may not result in a faster development or regulatory review or 
approval process compared to drugs considered for approval under conventional FDA procedures and does not assure ultimate approval by the FDA. In 
addition, even if one or more of our product candidates qualifies as a breakthrough therapy, the FDA may later decide that the product candidate no longer 
meets the conditions for qualification or decide that the time period for FDA review or approval will not be shortened.

Accelerated approval by the FDA, even if granted for one or more of our product candidates, may not lead to a faster development or regulatory review 
or approval process and it does not increase the likelihood that our product candidates will receive marketing approval.

We may seek approval of one or more of our product candidates using the FDA’s accelerated approval pathway. A product may be eligible for 
accelerated approval if it treats a serious or life-threatening condition and generally provides a meaningful advantage over available therapies. In addition, 
it must demonstrate an effect on a surrogate or intermediate endpoint that is reasonably likely to predict clinical benefit or on a clinical endpoint that can be 
measured earlier than irreversible morbidity or mortality, or IMM, that is reasonably likely to predict an effect on IMM or other clinical benefit. The FDA 
or other applicable regulatory agency makes the determination regarding whether a surrogate or intermediate endpoint is reasonably likely to predict long-
term clinical benefit. Given that expression of microdystrophin has not yet been established to predict long-term clinical benefit, it is not currently 
accepted, and it is possible the FDA and/or other applicable regulatory agencies could decide never to accept it, as a surrogate endpoint for the accelerated 
approval pathway for the treatment of Duchenne.

As a condition of approval, the FDA may require that a sponsor of a drug or biologic product candidate receiving accelerated approval perform 
adequate and well-controlled post-marketing clinical trials. These confirmatory trials must be completed with due diligence and may be required to be 
initiated prior to submission of the BLA. In addition, the FDA currently requires as a condition for accelerated approval pre-approval of promotional 
materials, which could adversely impact the timing of the commercial launch of the product. Further, with passage of FDORA in December 2022, Congress 
modified certain provisions governing accelerated approval of drug and biologic products. Specifically, the new legislation authorized the FDA to: require a 
sponsor to have its confirmatory clinical trial underway before accelerated approval is awarded, require a sponsor of a product granted accelerated approval 
to submit progress reports on its post-approval studies to FDA every six months (until the study is completed) and use expedited procedures to withdraw 
accelerated approval of an NDA or BLA after the confirmatory trial fails to verify the product’s clinical benefit. 

We may not be able to satisfy these requirements and conditions governing accelerated approval and, even if we do receive accelerated approval, we 

may not experience a faster development or regulatory review or approval process and receiving accelerated approval does not provide assurance of 
ultimate FDA approval.

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A potential regenerative medicine advanced therapy designation by the FDA for our product candidates may not lead to a faster development or 
regulatory review or approval process, and it does not increase the likelihood that our product candidates will receive marketing approval.

We may seek a regenerative medicine advanced therapy designation, or RMAT, for some of our product candidates. A regenerative medicine 
advanced therapy is defined as cell therapies, therapeutic tissue engineering products, human cell and tissue products, and combination products using any 
such therapies or products. Gene therapies, including genetically modified cells, that lead to a durable modification of cells or tissues may meet the 
definition of a regenerative medicine therapy. The regenerative medicine advanced therapy program is intended to facilitate efficient development and 
expedite review of regenerative medicine advanced therapies, which are intended to treat, modify, reverse, or cure a serious or life-threatening disease or 
condition. A new drug application or a BLA for a regenerative medicine advanced therapy may be eligible for priority review or accelerated approval 
through (1) surrogate or intermediate endpoints reasonably likely to predict long-term clinical benefit or (2) reliance upon data obtained from a meaningful 
number of sites. Benefits of such designation also include early interactions with the FDA to discuss any potential surrogate or intermediate endpoint to be 
used to support accelerated approval. A regenerative medicine therapy that is granted accelerated approval and is subject to post-approval requirements 
may fulfill such requirements through the submission of clinical evidence, clinical studies, patient registries, or other sources of real world evidence, such 
as electronic health records; the collection of larger confirmatory data sets; or post-approval monitoring of all patients treated with such therapy prior to its 
approval. 

Designation as a regenerative medicine advanced 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 regenerative medicine advanced therapy, the FDA may disagree and instead determine not to make such 
designation. In any event, the receipt of a regenerative medicine advanced therapy designation for a product candidate may not result in a faster 
development process, review or approval compared to drugs considered for approval under conventional FDA procedures and does not assure ultimate 
approval by the FDA. In addition, even if one or more of our product candidates qualify as regenerative medicine advanced therapies, the FDA may later 
decide that the biological products no longer meet the conditions for qualification. 

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We may seek PRIME Designation in the EU for one or more of our product candidates, but we might not receive such designations and, even if we do, 
such designations may not lead to a faster development or regulatory review or approval process.

In the EU, we may seek PRIME designation for our product candidates in the future. PRIME is a voluntary program aimed at enhancing the EMA’s 
role to reinforce scientific and regulatory support in order to optimize development and enable accelerated assessment of new medicines that are of major 
public health interest with the potential to address unmet medical needs. The program focuses on medicines that target conditions for which there exists no 
satisfactory method of treatment in the EU or even if such a method exists, it may offer a major therapeutic advantage over existing treatments. PRIME is 
limited to medicines under development and not authorized in the EU and the sponsor intends to apply for an initial marketing authorization application 
through the centralized procedure. To be accepted for PRIME, a product candidate must meet the eligibility criteria in respect of its major public health 
interest and therapeutic innovation based on information that is capable of substantiating the claims. 

The benefits of a PRIME designation include the appointment of a Committee for Medicinal Products for Human Use rapporteur to provide 

continued support and help to build knowledge ahead of a marketing authorization application, early dialogue and scientific advice at key development 
milestones, and the potential to qualify products for accelerated review, meaning reduction in the review time for an opinion on approvability to be issued 
earlier in the application process. PRIME enables a sponsor to request parallel EMA scientific advice and health technology assessment advice to facilitate 
timely market access. Even if we receive PRIME designation for any of our product candidates, the designation may not result in a materially faster 
development process, review or approval compared to conventional EMA procedures. Further, obtaining PRIME designation does not assure or increase 
the likelihood of EMA’s grant of a marketing authorization.

We may seek a Rare Pediatric Disease Designation for SGT-003 or other current and future product candidates. However, a BLA for SGT-003 or other 
current and future product candidates may not meet the eligibility criteria for a priority review voucher upon approval.

With enactment of the Food and Drug Administration Safety and Innovation Act in 2012, Congress authorized the FDA to award priority review 

vouchers to sponsors of certain rare pediatric disease product applications that meet the criteria specified in the law. This provision is designed to encourage 
development of new drug and biological products for prevention and treatment of certain rare pediatric diseases. Specifically, under this program, a sponsor 
who receives an approval for a drug or biologic for a “rare pediatric disease” may qualify for a voucher that can be redeemed to receive a priority review of 
a subsequent marketing application for a different product. The sponsor of a rare pediatric disease drug product receiving a priority review voucher may 
transfer (including by sale) the voucher to another sponsor. The voucher may be further transferred any number of times before the voucher is used, as long 
as the sponsor making the transfer has not yet submitted the application.

In order to receive a priority review voucher upon BLA approval, the product must receive designation from the FDA as a product for a rare 
pediatric disease prior to approval of the marketing application. A “rare pediatric disease” is a disease that is serious or life-threatening, in which the 
serious or life-threatening manifestations primarily affect individuals aged from birth to 18 years and affects fewer than 200,000 people in the United 
States, or affects more than 200,000 people in the United States but there is no reasonable expectation that the cost of developing and making available in 
the United States a product for such disease or condition will be recovered from sales in the United States of such product. In addition to receiving rare 
pediatric disease designation, in order to receive a priority review voucher, the BLA must be given priority review, rely on clinical data derived from 
studies examining a pediatric population and dosages of the product intended for that population, not seek approval for a different adult indication in the 
original rare pediatric disease product application and be for a product that does not include a previously approved active ingredient.

Under the current statutory sunset provisions for the Rare Pediatric Disease Priority Review Voucher Program, after September 30, 2024, FDA may 

only award a voucher for an approved rare pediatric disease product application if the sponsor has rare pediatric disease designation for the drug, and that 
designation was granted by September 30, 2024. After September 30, 2026, FDA may not award any rare pediatric disease priority review vouchers. If we 
do not obtain approval of a BLA by these dates, and if the Rare Pediatric Disease Priority Review Voucher Program is not further extended by 
congressional action, we may not receive a Priority Review Voucher.

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We may seek a fast track designation for one or more of our product candidates. However, such designation may not actually lead to a faster 
development or regulatory review or approval process. We might not receive such designation for one or more of our product candidates.

If a therapy is intended for the treatment of a serious condition and nonclinical or clinical data demonstrate the potential to address unmet medical 

need for this condition, a drug sponsor may apply for FDA fast track designation. However, fast track designation does not ensure that we will receive 
marketing approval or that approval will be granted within any particular timeframe. We may not experience a faster development or regulatory review or 
approval process with fast track designation compared to conventional FDA procedures. In addition, the FDA may withdraw fast track designation if it 
believes that the designation is no longer supported by data from our clinical development program or if the unmet need has been fulfilled with the 
approval of another product. Fast track designation alone does not guarantee qualification for the FDA’s priority review procedures. 

We may seek priority review designation for one or more of our product candidates, but we might not receive such designation, and even if we do, such 
designation may not lead to a faster development or regulatory review or approval process.

If the FDA determines that a product candidate offers a treatment for a serious condition and, if approved, the product would provide a significant 

improvement in safety or effectiveness, the FDA may designate the product candidate for priority review. A priority review designation means that the goal 
for the FDA to review an application is six months, rather than the standard review period of ten months. We may request priority review for our product 
candidates, however, we cannot assume that one or more of our product candidates will meet the criteria for that designation. The FDA has broad discretion 
with respect to whether or not to grant priority review status to a product candidate, so even if we believe a particular product candidate is eligible for such 
designation or status, the FDA may decide not to grant it. Moreover, a priority review designation does not necessarily mean a faster development or 
regulatory review or approval process or necessarily confer any advantage with respect to approval compared to conventional FDA procedures. Receiving 
priority review from the FDA does not guarantee approval within the six-month review cycle or at all. 

Inadequate funding for the FDA, the SEC and other government agencies, including from government shut downs, or other disruptions to these 
agencies’ operations, could hinder their ability to hire and retain key leadership and other personnel, 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, 

ability to hire and retain key personnel and accept the payment of user fees, and statutory, regulatory and policy changes. Average review times at the 
agency have fluctuated in recent years as a result. Disruptions at the FDA and other agencies may also slow the time necessary for new product candidates 
to be reviewed and/or approved by necessary government agencies, which would adversely affect our business. In addition, government funding of the SEC 
and other government 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. 

Disruptions at the FDA and other agencies may also slow the time necessary for new product candidates to be reviewed and/or approved by 
necessary government agencies, which would adversely affect our business. For example, over the last several years the U.S. government has shut down 
several times and certain regulatory agencies, such as the FDA and the SEC, have had to furlough critical FDA, SEC and other government employees and 
stop critical activities. If a prolonged government shutdown occurs, it could significantly impact the ability of the FDA to review and process our 
regulatory submissions in a timely manner, which could have a material adverse effect on our business. Further, future government shutdowns could impact 
our ability to access the public markets and obtain necessary capital in order to properly capitalize and continue our operations.

Separately, in response to the COVID-19 pandemic, a number of companies in 2020 and 2021 announced receipt of complete response letters due to 
the FDA’s inability to complete required inspections for their applications. Following a period of false starts, and temporary suspensions due to the omicron 
variant, the FDA announced on February 2, 2022 that it would resume domestic inspections beginning on February 7, 2022, and indicated that it would 
conduct foreign inspections beginning in April 2022 on a prioritized basis. However, the FDA may not be able to continue its current pace and review 
timelines could be extended, including where a pre-approval inspection or an inspection of clinical sites is required and due to the ongoing COVID-19 
pandemic and travel restrictions, the FDA is unable to complete such required inspections during the review period. Regulatory authorities outside the U.S. 
may adopt similar restrictions or other policy measures in response to the COVID-19 pandemic and may experience delays in their regulatory activities.

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We face significant competition and our competitors may achieve regulatory approval before us or develop therapies that are more advanced or 
effective than ours, which may adversely affect our ability to successfully market or commercialize SGT-003, AVB-202-TT, AVB-401 or other future 
candidates.

We operate in a highly competitive segment of the biopharmaceutical market. We face competition from many different sources, including larger 

and better-funded pharmaceutical, specialty pharmaceutical and biotechnology companies, as well as from academic institutions, government agencies and 
private and public research institutions. Our product candidates, if successfully developed and approved, will compete with established therapies as well as 
with new treatments that may be introduced by our competitors. There are a variety of product candidates, including gene therapies, in development for 
Duchenne and FA or dilated cardiomyopathy. Many of our competitors have significantly greater financial, product candidate development, manufacturing 
and marketing resources than we do. Large pharmaceutical and biotechnology companies have extensive experience in clinical testing and obtaining 
regulatory approval for their products, and mergers and acquisitions within these industries may result in even more resources being concentrated among a 
smaller number of larger competitors. Smaller and other early-stage companies may also prove to be significant competitors, particularly through 
collaborative arrangements with large and established companies. These third parties compete with us in recruiting and retaining qualified scientific and 
management personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or 
necessary for, our programs.

For example, we are aware of several companies and research institutions conducting clinicals trials of product candidates focused on systemic gene 
transfers for Duchenne, including Pfizer Inc. and Sarepta Therapeutics, Inc. with product candidates currently in Phase III clinical development, Genethon 
with a product candidate currently in a Phase I/II/III clinical trial, and REGENXBIO Inc., which has announced that it has initiated a Phase I/II clinical trial 
in the first quarter of 2023. In September 2022, Sarepta Therapeutics, Inc. announced that it had submitted a BLA for its gene therapy candidate SRP-9001 
for the treatment of ambulant patients with Duchenne with a PDUFA date of May 29, 2023. In February 2023, Reata Pharmaceuticals announced FDA 
approval of SKYCLSRYSTM (omaveloxolone) for the treatment of FA in adults and adolescents aged 16 years and older. We are also aware of several 
companies and research institutions conducting clinical trials of product candidates focused on systemic gene transfer for cardiomyopathy associated with 
FA, including Lexeo Therapeutics with a product candidate currently in a Phase I/II clinical trial.

Our commercial opportunity could be reduced or eliminated if competitors develop and commercialize products that are first to market or are safer, 

more effective, have fewer or less severe side effects, have broader market acceptance, are more convenient or are less expensive than any product 
candidate that we may develop.

We are aware of several companies focused on developing gene therapies in various indications, as well as several companies addressing other 
methods for modifying genes and regulating gene expression. Any advances in gene therapy technology made by a competitor may be used to develop 
therapies that could compete against SGT-003, AVB-202-TT, AVB-401 or any future gene therapy candidates we develop.

We may fail to capitalize on other potential product candidates that may represent a greater commercial opportunity or for which there is a greater 
likelihood of success.

The success of our business depends upon our ability to develop and commercialize SGT-003, AVB-202-TT, AVB-401 and other future candidates. 

Because we have limited resources, we may forego or delay pursuit of opportunities with certain programs or product candidates or for indications that later 
prove to have greater commercial potential than SGT-003, AVB-202-TT, AVB-401 or other future candidates. For example, in January 2020, in connection 
with implementing our strategic plan to create a leaner company focused on advancing SGT-001, we curtailed certain activities supporting our other 
research and development programs. Similarly, in April 2022, we announced a reorganization of our corporate operations to prioritize the advancement of 
our key programs, and we focused our research and development activities to those related to our SGT-001 and SGT-003 programs. Subsequent to that, in 
September 2022, we announced that we would be pausing activities for SGT-001.

In addition, in October 2020, we entered into a collaboration and license agreement with Ultragenyx, pursuant to which we granted Ultragenyx an 

exclusive worldwide license under certain intellectual property rights controlled by us to develop AAV8 or other clade E AAV variant pharmaceutical 
products that express our MD5 nNOS binding domain form of microdystrophin protein for the treatment of Duchenne and other disease indications 
resulting from a lack of functional dystrophin, which we refer to as the Licensed Products.

Our spending on current and future research and development programs may not yield any commercially viable product candidates. If we do not 

accurately evaluate the commercial potential for a particular product candidate, we may relinquish valuable rights to that product candidate through 
strategic collaborations, licensing or other arrangements in cases in which it would have been more advantageous for us to retain sole development and 
commercialization rights to such 

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product candidate. Alternatively, we may allocate internal resources to a product candidate in a therapeutic area in which it would have been more 
advantageous to enter into a partnering arrangement. If any of these events occur, we may be forced to abandon our development efforts with respect to a 
particular product candidate or fail to develop a potentially successful product candidate.

Risks related to the manufacturing and commercialization of our product candidates

We have entered into, and may in the future enter into, collaborations with third parties for the development or commercialization of our product 
candidates. If our collaborations are not successful, we may not be able to capitalize on the market potential of these product candidates and our 
business could be adversely affected. 

In October 2020, we entered into a collaboration and license agreement with Ultragenyx, pursuant to which we granted Ultragenyx an exclusive 

worldwide license under certain intellectual property rights controlled by us to develop the Licensed Products. 

While we have retained all rights to and are developing on our own SGT-003, we may in the future enter into development, distribution or marketing 

arrangements with third parties with respect to SGT-003, AVB-202-TT, AVB-401 or future candidates. Our likely collaborators for any such sales, 
marketing, distribution, development, licensing or broader collaboration arrangements include large and mid-size pharmaceutical companies, regional and 
national pharmaceutical companies and biotechnology companies. If we enter into any such arrangements with any third parties in the future, we will likely 
have limited control over the amount and timing of resources that our collaborators dedicate to the development or commercialization of our product 
candidates. Our ability to generate revenues from these arrangements will depend on our collaborators’ abilities and efforts to successfully perform the 
functions assigned to them in these arrangements. 

Collaborations that we enter into, including our collaboration with Ultragenyx, may not be successful, and any success will depend heavily on the 

efforts and activities of such collaborators. Collaborations pose a number of risks, including the following: 

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•

collaborators have significant discretion in determining the amount and timing of efforts and resources that they will apply to these 
collaborations; 

collaborators may not perform their obligations as expected; 

collaborators may not pursue development of our product candidates or may elect not to continue or renew development programs based on 
results of clinical trials or other studies, changes in the collaborators’ strategic focus or available funding, or external factors, such as an 
acquisition, that divert resources or create competing priorities; 

collaborators may not pursue commercialization of any product candidates that achieve regulatory approval or may elect not to continue or 
renew commercialization programs based on results of clinical trials or other studies, changes in the collaborators’ strategic focus or available 
funding, or external factors, such as an acquisition, 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; 

we may not have access to, or may be restricted from disclosing, certain information regarding product candidates being developed or 
commercialized under a collaboration and, consequently, may have limited ability to inform our stockholders about the status of such product 
candidates on a discretionary basis; 

collaborators, including Ultragenyx, could develop products that compete directly or indirectly with our product candidates and products 
pursuant to the collaboration;

collaborators could independently develop, or develop with third parties, products that compete directly or indirectly with our product 
candidates and products 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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•

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a collaborator may fail to comply with applicable regulatory requirements regarding the development, manufacture, distribution or marketing 
of a product candidate or product; 

a collaborator 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 intellectual property or 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 obtain, maintain, enforce, defend or protect our intellectual property or proprietary rights or may use our 
proprietary information in such a way as to potentially lead to disputes or legal proceedings that could jeopardize or invalidate our intellectual 
property or proprietary information or expose us to potential litigation; 

disputes may arise with respect to the ownership of intellectual property developed pursuant to our collaborations; 

collaborators may infringe, misappropriate or otherwise violate the intellectual property or proprietary rights of third parties, which may 
expose us to litigation and potential liability; and 

collaborations may be terminated for the convenience of the collaborator, and, if terminated, we could be required to raise additional capital to 
pursue further development or commercialization of the applicable product candidates. 

Collaboration agreements may not lead to development or commercialization of product candidates in the most efficient manner, or at all. If any 

collaborations that we enter into do not result in the successful development and commercialization of products 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 the collaboration. If we do not receive the 
funding we expect under these agreements, our development of our product candidates could be delayed and we may need additional resources to develop 
our product candidates. All of the risks relating to product development, regulatory approval and commercialization described herein also apply to the 
activities of our collaborators. 

Additionally, subject to its contractual obligations to us, 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. 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 business and financial communities could be 
adversely affected.

We may not be successful in finding strategic collaborators for continuing development of SGT-003, AVB-202-TT, AVB-401 or other future candidates 
or platform technologies, or for successfully commercializing or competing in the market for certain indications.

We may seek to establish strategic partnerships for developing SGT-003, AVB-202-TT, AVB-401 or other future candidates or platform technologies 
due to capital costs required to develop, manufacture and commercialize our product candidates or platform technologies. We may not be successful in our 
efforts to establish strategic partnerships or other alternative arrangements because, among other things, our research and development pipeline may be 
insufficient, SGT-003, AVB-202-TT or AVB-401 or platform technologies may be deemed to be at too early of a stage of development for collaborative 
effort or third parties may not view SGT-003, AVB-202-TT or AVB-401 or platform technologies as having the requisite potential to demonstrate safety 
and efficacy. We cannot be certain that, following a strategic transaction, we will achieve an economic or business benefit that justifies such transaction. If 
we seek to but are unable to reach agreements with suitable collaborators on a timely basis, on acceptable terms or at all, we may have to curtail, reduce or 
delay the development of a product candidate, delay its potential commercialization, reduce the scope of any sales or marketing activities or increase our 
expenditures and undertake development, manufacturing or commercialization activities independently. If we elect to fund our own independent 
development or commercialization activities, we will 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 and do not have sufficient funds or expertise to undertake the necessary development, 
manufacturing and commercialization activities, we may not be able to further develop SGT-003, AVB-202-TT, AVB-401 or other future candidates or 
platform technologies. 

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We have limited gene therapy manufacturing experience and could experience production problems and delays in obtaining regulatory approval of our 
manufacturing processes, which could result in delays in the development or commercialization of SGT-003 or other current and future candidates. In 
addition, changes to manufacturing sites or processes, or formulations for our product candidates may result in additional cost or delay. 

We have limited experience manufacturing SGT-003 and our other current or future candidates. The manufacturing process we have used 

historically and the manufacturing process we plan to use in the future to produce product for our candidates are complex and our processes have not been 
validated for commercial use. As candidates progress through preclinical studies and clinical trials to marketing approval and commercialization, it is 
common that various aspects of the development program, such as manufacturing methods and formulation, are altered along the way in an effort to 
optimize safety, quality, efficacy, yield, manufacturing batch size, minimize costs and achieve consistent results. For example, we have recently moved to a 
transient transfection-based manufacturing process for SGT-003. While we have observed positive results in preclinical studies using this new 
manufacturing process, any further changes in manufacturing or formulation may result in effects and results that are different from those observed in our 
completed preclinical studies to date. Similarly, in the future we may introduce an alternative process or formulation of one or more of our candidates 
during the course of our planned preclinical studies or clinical trials. Such changes carry the risk that they will not achieve these intended objectives. Any 
of these changes could cause our candidates to perform differently and affect the results of planned clinical trials or other future clinical trials conducted 
with the altered materials. This could delay initiation or completion of clinical trials, require the conduct of bridging studies or clinical trials or the 
repetition of one or more studies or clinical trials, increase development costs, delay approval of our candidates and jeopardize our ability to commercialize 
our candidates, if approved, and generate revenue.

The production of SGT-003 uses a transient transfection-based process which requires processing steps that are more complex than those required 

for most chemical pharmaceuticals. We also intend to use transient transfection manufacturing for our other current and future candidates.  Moreover, 
unlike chemical pharmaceuticals, the physical and chemical properties of a gene therapy candidate such as ours generally cannot be fully characterized. As 
a result, assays of the finished product may not be sufficient to ensure that the product will perform in the intended manner. Accordingly, we have and will 
continue to employ multiple steps to control our manufacturing processes to assure that the process works and that SGT-003 and our current and future 
products are made strictly and consistently in compliance with such processes. We must supply all necessary documentation in support of an IND, BLA or 
MAA on a timely basis and must adhere to the FDA’s and the European Union’s cGMP requirements before we can obtain marketing approval for SGT-003 
and other current and future candidates. In order to obtain approval, we will need to ensure that all of our processes, methods and equipment are compliant 
with cGMP requirements, by performing extensive audits of contract laboratories, manufacturers and suppliers.

We currently rely on third-party manufacturers for SGT-003 and plan to rely on third-party manufacturers for our AVB-202-TT and AVB-401 
programs. In order to produce sufficient quantities of for clinical trials and initial U.S. commercial demand, we have and will continue to further optimize 
and increase the capacity of our manufacturing process at our third-party manufacturers. We may need to make changes to our manufacturing processes, 
beyond implementation of a transient transfection-based manufacturing process. We may not be able to produce sufficient quantities of drug product due to 
several factors, including equipment malfunctions, facility contamination, material shortages or contamination, natural disasters, a public health issue (for 
example, an outbreak of a contagious disease such as the COVID-19 pandemic), disruption in utility services, human error or disruptions in the operations 
of our suppliers. For example, we have not released a manufacturing lot for clinical supply utilizing the transient transfection-based manufacturing process 
and may experience variability with respect to the success and yield between lots that will require continued engagement in process development activities 
to improve the reproducibility, reliability, quality and consistency of yields of the manufacturing process. Additional manufacturing runs will be required to 
produce necessary or adequate supply for our future clinical trials and there is no guarantee that all of those runs will be within specifications or produce 
adequate supply. If we are not able to produce sufficient supply on the timeline expected, our overall development schedule for SGT-003 and other current 
and future candidates could be delayed, and we could incur additional expense. Any such failure could delay or prevent our IND or commercialization of 
SGT-003 or other current and future candidates. 

If supply from a manufacturing facility is interrupted, including as a result of equipment malfunctions, facility contamination, material shortages or 

contamination, natural disasters, the COVID-19 pandemic or another public health issue, disruption in utility services or human error, there could be a 
significant disruption in supply of SGT-003 or other current and future product candidates. In such instance, we may need to locate appropriate replacement 
third-party manufacturers, and we may not be able to enter into arrangements with such additional third-party manufacturers on favorable terms or at all. 
Use of new third-party manufacturers could increase the risk of delays in production or insufficient supplies of our product candidates as we transfer our 
manufacturing technology to these manufacturers and as they gain experience manufacturing our product candidates.

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In addition, product manufacturers and their facilities are subject to payment of user fees and continual review and periodic inspections by the FDA 

and other regulatory authorities for compliance with cGMP requirements and adherence to commitments made in the BLA or foreign marketing 
application. If we, or a regulatory authority, discover previously unknown problems with a product, such as adverse events of unanticipated severity or 
frequency, or problems with the facility where the product is manufactured, a regulatory authority may impose restrictions relative to that product, the 
manufacturing facility or us, including requiring recall or withdrawal of the product from the market or suspension of manufacturing.

In addition, the FDA, the EMA and other foreign regulatory authorities may require us to submit samples of any lot of any approved product 
together with the protocols showing the results of applicable tests at any time. Under some circumstances, the FDA, the EMA or other foreign regulatory 
authorities may require that we not distribute a lot until the agency authorizes its release. Lot failures or product recalls could cause us to delay or abandon 
clinical trials or product launches.

We also may encounter problems hiring and retaining the experienced scientific, quality control and manufacturing personnel needed to oversee our 

manufacturing and quality control process, which could result in delays in our production or difficulties in maintaining compliance with applicable 
regulatory requirements. 

Any problems in our manufacturing process or facilities could make us a less attractive collaborator for potential partners, including biotechnology 

and pharmaceutical companies and academic research institutions, which could limit our access to additional attractive development programs. Problems in 
our manufacturing process or facilities also could restrict our ability to meet market demand for SGT-003 or other current and future product candidates.

We expect to utilize third parties to conduct our product manufacturing for the foreseeable future. Therefore, we are subject to the risk that these third 
parties may not perform satisfactorily or meet regulatory requirements. 

We do not independently manufacture material for our planned and future clinical programs and we expect to utilize materials manufactured by 

cGMP-compliant third-party suppliers. If these third-party manufacturers do not successfully carry out their contractual duties, meet expected deadlines or 
manufacture SGT-003 and other current and future product candidates in accordance with quality and regulatory requirements or if there are disagreements 
between us and these third-party manufacturers, we may not be able to complete, or may be delayed in completing, the clinical trials required for approval 
of SGT-003 and other current and future product candidates. In such instances, we may need to locate an appropriate replacement third-party relationship, 
which may not be readily available or on acceptable terms, which would cause additional delay or increased expense prior to the approval of our product 
candidates.

Additionally, we rely on our third-party manufacturers for their compliance with the cGMP and their maintenance of adequate quality control, 
quality assurance and qualified personnel. Furthermore, all of our third-party suppliers and manufacturers are engaged with other companies to supply 
and/or manufacture materials or products for such companies, which exposes them to regulatory risks for the production of such materials and products. 
FDA inspections may identify compliance issues at third-party manufacturer facilities or at the facilities of third-party suppliers that may disrupt production 
or distribution, or require substantial resources to correct and prevent recurrence of any deficiencies, and could result in fines or penalties by regulatory 
authorities. In addition, discovery of problems with a product or the failure to comply with applicable requirements may result in restrictions on a product, 
manufacturer or holder of an approved BLA, including withdrawal or recall of the product from the market or other voluntary, FDA-initiated or judicial 
action, including fines, injunctions, civil penalties, license revocations, seizure, total or partial suspension of production or criminal penalties, any of which 
could significantly and adversely affect supplies of our product candidates.

In addition, we do not currently have long-term supply or manufacturing arrangements in place for the production of SGT-003 or other current and 

future product candidates at commercial scale. Although we intend to establish additional sources for long-term supply, from one or more third-party 
manufacturers, if the gene therapy industry were to grow, we may encounter increasing competition for the materials necessary for the production of SGT-
003 or other current and future product candidates. We may experience difficulties in scaling up production beyond clinical batches. Furthermore, demand 
for third-party cGMP manufacturing facilities may grow at a faster rate than existing manufacturing capacity, which could disrupt our ability to find and 
retain third-party manufacturers capable of producing sufficient quantities of SGT-003 or other current and future product candidates for future clinical 
trials or to meet initial commercial demand in the United States. We currently rely, and expect to continue to rely, on additional third parties to manufacture 
materials for our product candidates 

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and to perform quality testing. We intend to maintain third-party manufacturers for these materials, as well as to serve as additional sources of SGT-003 and 
other current and future product candidates, which will expose us to risks including:

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reduced control of manufacturing activities;

the inability of certain CMOs to produce our product candidates in the necessary quantities, or in compliance with current cGMP or in 
compliance with pertinent regulatory requirements and within our planned time frame and cost parameters;

termination or nonrenewal of manufacturing and service agreements with third parties in a manner or at a time that is costly or damaging to us; 
and

disruptions to the operations of our third-party manufacturer and our and their suppliers caused by conditions unrelated to our business or 
operations, including the bankruptcy of the manufacturer or supplier, natural disasters or public health issues.

Any of these events could lead to clinical trial delays or failure to obtain regulatory approval or impact our ability to successfully commercialize 
SGT-003 or other current and future product candidates. Some of these events could be the basis for FDA action, including injunction, recall, seizure or 
total or partial suspension of product manufacture. 

If we are unable to establish sales, distribution and marketing capabilities or enter into agreements with third parties to market and sell SGT-003 and 
other current and future candidates, we will be unable to generate any product revenue.

We currently have no sales, distribution or marketing organization. To successfully commercialize any product candidate that may result from our 

development programs, we will need to develop these capabilities, either on our own or with others. The establishment and development of our own 
commercial team or the establishment of a contract sales force to market any product candidate we may develop will be expensive and time-consuming and 
could delay any product launch. Moreover, we cannot be certain that we will be able to successfully develop this capability. We may enter into 
collaborations regarding SGT-003 and other current and future candidates with other entities to utilize their established marketing and distribution 
capabilities, but we may be unable to enter into such agreements on favorable terms, if at all. If any future collaborators do not commit sufficient resources 
to commercialize our product candidates, or we are unable to develop the necessary capabilities on our own, we will be unable to generate sufficient 
product revenue to sustain our business. We compete with many companies that currently have extensive, experienced and well-funded sales, distribution 
and marketing operations to recruit, hire, train and retain marketing and sales personnel. We will also face competition in our search for third parties to 
assist us with the sales and marketing efforts of any future products. Without an internal team or the support of a third party to perform marketing and sales 
functions, we will be unable to compete successfully against these more established companies.

If we are unable to establish medical affairs capabilities, we will be unable to establish an educated market of physicians to administer any future 
products.

We currently have no medical affairs team. If we are unable to successfully build a medical affairs team to address scientific and medical questions 

and provide expert guidance and education in the application, administration and utilization of any future products to physicians, we may not be able to 
establish an educated market for our products. The establishment and development of our own medical affairs team will be expensive and time-consuming 
and could delay any product launch. Moreover, we cannot be certain that we will be able to successfully develop this capability.

If the market opportunities for any of our future products are smaller than we believe they are, our revenue prospects may be adversely affected and 
our business may suffer.

We currently focus our research and product development on treatments for Duchenne, FA, BAG3-mediated dilated cardiomyopathy and other 

undisclosed cardiac indications. Our understanding of the patient population with these diseases is based on estimates in published literature and by 
disease-focused foundations. These estimates may prove to be incorrect and new studies may reduce the estimated incidence or prevalence of these 
diseases. The number of patients in the United States, the European Union and elsewhere may turn out to be lower than expected, patients may not be 
otherwise amenable to treatment with our product candidates or patients may become increasingly difficult to identify and access.

Further, there are several factors that could contribute to reducing the actual number of patients who could receive SGT-003, AVB-202. AVB-401 or 

other future candidates less than the potentially addressable market. These include the lack of widespread availability of, and limited reimbursement for, 
new therapies in many underdeveloped markets. Further, the 

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severity of the progression of a degenerative disease such as Duchenne and FA up to the time of treatment will likely diminish the therapeutic benefit 
conferred by a gene therapy due to irreversible cell damage.

Certain patients’ immune systems might prohibit the successful delivery of certain gene therapy products, thereby potentially limiting the population of 
patients amenable to gene transfer.

As with many AAV-mediated gene therapy approaches, certain patients’ immune systems might prohibit the successful delivery of certain gene 

therapy products, thereby potentially limiting the population of patients amenable to gene transfer. While we are working to better understand the 
prevalence of antibodies to AAV, or seroprevalence, as it relates to gene therapy, the exact seroprevalence is currently unknown and varies by AAV 
serotype and age. We may not be able to address these potentially limiting factors for gene therapy as a treatment for certain patients. 

The commercial success of any of our candidates, if approved, will depend upon market acceptance by physicians, patients, third-party payors and 
others in the medical community.

Even with the requisite approvals from the FDA in the United States, the European Commission in the European Union and other regulatory 
authorities internationally, the commercial success of our candidates will depend, in part, on the acceptance of physicians, patients and health care payors of 
gene therapy products in general, and, in particular for each of our current and future candidate, as medically necessary, cost-effective and safe. Any 
product that we commercialize may not gain acceptance by physicians, patients, health care payors and others in the medical community due to ethical, 
social, medical and legal concerns. If our products do not achieve an adequate level of acceptance, we may not generate significant product revenue and 
may not become profitable. The degree of market acceptance of gene therapy products and, in particular, our current and future candidates, if approved for 
commercial sale, will depend on multiple factors, including:

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the efficacy and safety of our current and future candidates as demonstrated in clinical trials; 

the efficacy and potential and perceived advantages of SGT-003 and AVB-202-TT over alternative treatments; 

the cost of treatment relative to alternative treatments; 

the clinical indications for which SGT-003 and AVB-202-TT is approved by the FDA, the European Commission or other regulatory 
authorities, as applicable; 

the willingness of physicians to prescribe new therapies; 

the willingness of the target patient population to try new therapies; 

the prevalence and severity of any side effects; 

product labeling or product insert requirements of the FDA, the EMA or other regulatory authorities, including any limitations or warnings 
contained in a product’s approved labeling; 

relative convenience and ease of administration; 

the strength of marketing and distribution support; 

the timing of market introduction of competitive products; 

the availability of products to meet market demand; 

publicity concerning our product candidates or competing products and treatments; 

any restrictions on the use of our products together with other medications; and 

favorable third-party payor coverage and adequate reimbursement.

Even if a potential product candidate displays a favorable efficacy and safety profile in preclinical studies and clinical trials, market acceptance of 

the product will not be fully known until after it is launched.

Our efforts to educate the medical community and third-party payors on the benefits of SGT-003, AVB-202-TT, AVB-401 and other future 
candidates may require significant resources and may never be successful. Such efforts may require more resources than are typically required due to the 
complexity and uniqueness of our potential product candidates. If SGT-003, AVB-202-TT, AVB-401 or other future candidates are approved but fail to 
achieve market acceptance among physicians, patients or third-party payors, we will not be able to generate significant revenue from any such product.

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Our gene transfer approach utilizes a vector derived from a virus, which may be perceived as unsafe or may result in unforeseen adverse events. 
Negative public opinion and increased regulatory scrutiny of gene therapy may damage public perception of the safety of SGT-003, AVB-202-TT, AVB-
401 or our other gene transfer product candidates and adversely affect our ability to conduct our business or obtain regulatory approvals for SGT-003, 
AVB-202-TT, AVB-401 or other gene transfer candidates.

Gene transfer remains a novel technology that faces many challenges imposed by the humoral immune response. The immunogenicity of AAV gene 

transfers is a very complex process that we and others continue to work understand through the extensive clinical experience that now exists over a broad 
spectrum of therapeutic areas and indications. Marked inflammatory toxicities have been observed, including complement activation, cytopenias, severe 
hepatotoxicity as well as transgene related toxicities representing part of the continuum of diverse aspects of clinical immune responses that can be 
observed post gene transfer.

In particular, our success will depend upon physicians who specialize in the treatment of Duchenne, FA and our cardiac pipeline indications, 

prescribing treatments that involve the use of viral vectors in lieu of, or in addition to, other treatments with which they are more familiar and for which 
greater clinical data may be available. More restrictive government regulations or negative public opinion may delay or impair the development and 
commercialization or demand for any product candidate we may develop. A public backlash developed against gene therapy following the death of a 
patient in 1999 during a gene therapy clinical trial of research subjects with ornithine transcarbamylase, or OTC, deficiency, a rare disorder in which the 
liver lacks a functional copy of the OTC gene. The death of the clinical trial subject was due to complications of adenovirus vector administration. Dr. 
James M. Wilson, former chair of our Scientific Advisory Board, was a co-investigator of the 1999 trial while he was Director of the Institute for Human 
Gene Therapy of the University of Pennsylvania. Serious adverse events in our clinical trials, including the events that led to the previously-lifted clinical 
holds on IGNITE DMD or other clinical trials involving gene transfer products or our competitors’ products, even if not ultimately attributable to the 
relevant product candidates, and the resulting publicity, could result in increased government regulation, unfavorable public perception, potential regulatory 
delays in the testing or approval of SGT-003, AVB-202-TT and our other future product candidates, stricter labeling requirements for SGT-003, AVB-202-
TT and our other future candidates, if approved, and a decrease in demand for SGT-003, AVB-202-TT and our other future candidates.

Any contamination in our manufacturing process, shortages of materials or failure of any of our key suppliers to deliver necessary components could 
result in interruption in the supply of our product candidates and delays in our clinical development or commercialization schedules.

Given the nature of biologics manufacturing, there is a risk of contamination in our manufacturing processes. Any contamination could materially 

adversely affect our ability to produce our candidates on schedule and could cause reputational damage.

Some of the materials required in our manufacturing process are derived from biologic sources. Such materials are difficult to procure and may be 

subject to contamination or recall. A material shortage, contamination, recall or restriction on the use of biologically derived substances in the manufacture 
of our candidates could adversely impact or disrupt the manufacturing or the production of clinical material, which could materially and adversely affect 
our development timelines.

The insurance coverage and reimbursement status of newly approved products is uncertain. Failure to obtain or maintain adequate coverage and 
reimbursement for our product candidates, if approved, could limit our ability to market those products and decrease our ability to generate product 
revenue.

There is significant uncertainty related to third-party coverage and reimbursement of newly approved products. We expect the cost of a single 
administration of gene transfer products, such as those we are developing, to be substantial, when and if they achieve regulatory approval. We expect that 
coverage and reimbursement by government and private payors will be essential for most patients to be able to afford these treatments. Accordingly, sales 
of our future products, if approved, will depend substantially, both domestically and abroad, on the extent to which the costs of such product candidates will 
be paid by health maintenance, managed care, pharmacy benefit and similar health care management organizations, or will be reimbursed by government 
authorities, private health coverage insurers and other third-party payors. Coverage and reimbursement by a third-party payor may depend upon several 
factors, including the third-party payor’s determination that use of a product is:

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a covered benefit under its health plan;

safe, effective and medically necessary;

appropriate for the specific patient;

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•

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•

cost-effective;

durable and a one-time treatment; and

neither experimental nor investigational.

Obtaining coverage and reimbursement for a product from third-party payors is a time-consuming and costly process that could require us to provide 

to the payor supporting scientific, clinical and cost-effectiveness data. If coverage and reimbursement are not available, or are available only at limited 
levels, we may not be able to successfully commercialize our future products, if approved. Even if coverage is provided, the approved reimbursement 
amount may not be adequate to realize a sufficient return on our investment.

To our knowledge, only a limited number of gene transfer products have been approved for coverage and reimbursement by the Centers for 
Medicare & Medicaid Services, or the CMS, the agency responsible for administering the Medicaid program. It is difficult to predict what the CMS will 
decide with respect to coverage and reimbursement for fundamentally novel products such as ours, as there is no body of established practices and 
precedents for these types of products either in the United States or the European Union. For example, several cancer drugs have been approved for 
reimbursement in the United States and have not been approved for reimbursement in certain European Union member states and vice versa. It is difficult 
to predict what third-party payors will decide with respect to the coverage and reimbursement for our future products, if approved. 

Governments outside the United States tend to impose strict price controls, which may adversely affect our revenue, if any.

Outside the United States, international operations generally are subject to extensive government price controls and other market regulations, and 

increasing emphasis on cost-containment initiatives in the European Union, Canada and other countries may put pricing pressure on us. In general, the 
prices of therapeutics outside the United States are substantially lower than in the United States. Other countries may allow companies to fix their own 
prices for therapeutics, but monitor and control company profits. Additional foreign price controls or other changes in pricing regulations could restrict the 
amount that we are able to charge for our product candidates. Accordingly, in markets outside the United States, the reimbursement for our product 
candidates may be reduced compared with the United States and may be insufficient to generate commercially reasonable product revenue.

Additionally, in countries where the pricing of gene therapy products is subject to governmental control, pricing negotiations with governmental 

authorities can take considerable time after the receipt of marketing approval for a product. Political, economic and regulatory developments may further 
complicate pricing negotiations, and pricing negotiations may continue after reimbursement has been obtained. Reference pricing used by various European 
Union member states and parallel distribution, or arbitrage between low-priced and high-priced member states, can further reduce prices. To obtain 
reimbursement or pricing approval in some countries, we may be required to conduct a clinical trial that compares the cost-effectiveness of our product 
candidate to other available therapies. Reimbursement of our products may be unavailable or limited in scope or amount, which would adversely affect our 
revenue, if any.

If we obtain approval to commercialize our future products outside of the United States, in particular in the European Union, a variety of risks 
associated with international operations could materially adversely affect our business.

We expect that we will be subject to additional risks in commercializing our future products, if approved, outside the United States, including:

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different regulatory requirements for approval of therapeutics in foreign countries;

reduced protection for intellectual property rights;

the existence of additional third-party patent rights of potential relevance to our business;

unexpected changes in tariffs, trade barriers and regulatory requirements;

economic weakness, including inflation, or political instability in particular foreign economies and markets;

compliance with tax, employment, immigration and labor laws for employees living or traveling abroad;

foreign currency fluctuations, which could result in increased operating expenses and reduced revenue, and other obligations incident to doing 
business in another country;

foreign reimbursement, pricing and insurance regimes;

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production shortages resulting from any events affecting material supply or manufacturing capabilities abroad; and

business interruptions resulting from geopolitical actions, including war and terrorism or natural disasters including earthquakes, typhoons, 
floods and fires.

The failure to comply with applicable foreign regulatory requirements may result in, among other things, fines, suspension, variation or withdrawal 

of regulatory approvals, product recalls, seizure of products, operating restrictions and criminal prosecution.

If we engage in future acquisitions or strategic collaborations, this may increase our capital requirements, dilute our stockholders, cause us to incur 
debt or assume contingent liabilities and subject us to other risks.

We may evaluate various acquisitions and strategic collaborations, including licensing or acquiring complementary products, intellectual property 

rights, technologies or businesses. Any potential acquisition or strategic collaboration may entail numerous risks, including:

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•

•

increased operating expenses and cash requirements;

the assumption of additional indebtedness or contingent liabilities;

assimilation of operations, intellectual property and products of an acquired company, including difficulties associated with integrating new 
personnel;

the diversion of our management’s attention from our existing product candidates and initiatives in pursuing such acquisition or strategic 
collaboration;

retention of key employees, the loss of key personnel and uncertainties in our ability to maintain key business relationships;

risks and uncertainties associated with the other party to such a transaction, including the prospects of that party and their existing products or 
product candidates and regulatory approvals; and

our inability to generate revenue from acquired technology and/or products sufficient to meet our objectives in undertaking the acquisition or 
collaboration or even to offset transaction costs.

In addition, if we undertake acquisitions, we may issue dilutive securities, assume or incur debt obligations, incur large one-time expenses and 

acquire intangible assets that could result in significant future amortization expense. Moreover, we may not be able to locate suitable acquisition or 
collaboration opportunities and this inability could impair our ability to grow or obtain access to technology or products that may be important to the 
development of our business.

Risks related to our business operations

Our future success depends on our ability to retain key employees, consultants and advisors and to attract, retain and motivate qualified personnel.

We are highly dependent on members of our executive team, the loss of whose services may adversely impact the achievement of our objectives. 

While we have entered into employment agreements with certain of our executive officers, any of them could leave our employment at any time. We 
currently do not have “key person” insurance on any of our employees. The loss of the services of one or more of our current key employees might impede 
the achievement of our research, development and commercialization objectives.

Recruiting and retaining other qualified employees, consultants and advisors for our business, including scientific and technical personnel, also will 

be critical to our success. There currently is a shortage of skilled individuals with substantial gene therapy experience, which is likely to continue. As a 
result, competition for skilled personnel, including in gene therapy research and vector manufacturing, is intense and the turnover rate can be high. We may 
not be able to attract and retain personnel on acceptable terms given the competition among numerous pharmaceutical and biotechnology companies and 
academic institutions for individuals with similar skill sets. In addition, the failure to succeed in preclinical or clinical trials or applications for marketing 
approval may make it more challenging to recruit and retain qualified personnel. The inability to recruit, or loss of services of certain executives, key 
employees, consultants or advisors, may impede the progress of our research, development and commercialization objectives.

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Our strategic plan and associated workforce reductions may not result in anticipated savings, could result in total costs and expenses that are greater 
than expected and could disrupt our business.

In April 2022 and December 2022, we announced a reduction in workforce by approximately 35% and 18%, respectively, as part of a strategic 
plan designed to streamline our operating structure. We may not realize, in full or in part, the anticipated benefits, savings and improvements in our cost 
structure from our restructuring efforts due to unforeseen difficulties, delays or unexpected costs. If we are unable to realize the expected operational 
efficiencies and cost savings from the restructuring, our operating results and financial condition would be adversely affected. We also cannot guarantee 
that we will not have to undertake additional workforce reductions or restructuring activities in the future. Furthermore, our strategic restructuring plan and 
the Acquisition may be disruptive to our operations. For example, our workforce reductions and integration of AavantiBio’s business and operations into 
ours could yield unanticipated consequences, such as attrition beyond planned staff reductions, or increase difficulties in our day-to-day operations. Our 
workforce reductions and the Acquisition could also harm our ability to attract and retain qualified management, scientific, clinical, manufacturing and 
sales and marketing personnel who are critical to our business. Any failure to attract or retain qualified personnel could prevent us from successfully 
developing and commercializing our product candidates in the future.

If we are unable to manage growth in the scale and complexity of our operations, our performance may suffer.

If we are successful in executing our business strategy, we will need to expand our managerial, operational, financial and other systems and 
resources to manage our operations, continue our research and development activities and, in the longer term, build a commercial infrastructure to support 
commercialization of our current and future candidates and products that are approved for sale. Future growth would impose significant added 
responsibilities on members of management. It is likely that our management, finance, development personnel, systems and facilities currently in place may 
not be adequate to support this future growth. Our need to effectively manage our operations, growth and any future product candidates requires that we 
continue to develop more robust business processes and improve our systems and procedures in each of these areas and to attract and retain sufficient 
numbers of talented employees. We may be unable to successfully implement these tasks on a larger scale and, accordingly, may not achieve our research, 
development and growth goals.

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

We are exposed to the risk of employee fraud or other misconduct, including intentional failures to comply with FDA regulations or similar 
regulations of comparable foreign regulatory authorities, provide accurate information to the FDA or comparable foreign regulatory authorities, comply 
with manufacturing standards, comply with federal and state healthcare fraud and abuse laws and regulations and similar laws and regulations established 
and enforced by comparable foreign regulatory authorities, report financial information or data accurately or disclose unauthorized activities to us. 
Employee misconduct could also involve the improper use of information obtained in the course of clinical trials, which could result in regulatory sanctions 
and serious harm to our reputation. This could include violations of the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, 
other U.S. federal and state law, and requirements of non-U.S. jurisdictions, including the European Union Data Protection Directive. It is not always 
possible to identify and deter employee misconduct, and the precautions we take to detect and prevent this activity may not be effective in controlling 
unknown or unmanaged risks or losses or in protecting us from governmental investigations or other actions or lawsuits stemming from a failure to be in 
compliance with such laws, standards, regulations, guidance or codes of conduct. If any such actions are instituted against us, and we are not successful in 
defending ourselves or asserting our rights, those actions could have a significant impact on our business and results of operations, including the imposition 
of significant fines or other sanctions.

Enacted and future legislation may increase the difficulty and cost for us to obtain marketing approval of and commercialize our product candidates 
and may affect the prices we may set.

Our business and financial prospects could be affected by changes in health care spending and policy in the United States and abroad. We operate in 

a highly regulated industry and new laws or judicial decisions, or new interpretations of existing laws or decisions, related to health care availability, the 
method of delivery or payment for health care products and services could negatively impact our business, operations and financial condition.

For example, in the United States there is significant interest in promoting health care reform, as evidenced by the enactment of the Patient 
Protection and Affordable Care Act and the companion Health Care and Education Reconciliation Act, or the Health Care Reform Law. The Health Care 
Reform Law increased federal oversight of private health insurance 

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plans and included a number of provisions designed to reduce Medicare expenditures and the cost of health care generally, to reduce fraud and abuse, and 
to provide access to increased health coverage.

The Health Care Reform Law also imposed substantial changes to the U.S. system for paying for health care, including programs to extend medical 

benefits to millions of individuals who have lacked insurance coverage. Generally, implementation of the Health Care Reform Law has thus far included 
significant cost-saving, revenue and payment reduction measures with respect to, for example, several government health care programs that might cover 
our products in the United States, should they be commercialized, including Medicaid and Medicare. Additional downward pricing pressure associated 
with the Health Care Reform Law includes that the Health Care Reform Law established and provided significant funding for a Patient-Centered Outcomes 
Research Institute to coordinate and fund Comparative Effectiveness Research, as those terms are defined in the Health Care Reform Law. While the stated 
intent of Comparative Effectiveness Research is to develop information to guide providers to the most efficacious therapies, outcomes of Comparative 
Effectiveness Research could influence the reimbursement or coverage for therapies that are determined to be less cost-effective than others. Should any of 
our products be approved for sale, but then determined to be less cost-effective than alternative therapies, the levels of reimbursement for these products, or 
the willingness to reimburse at all, could be adversely impacted.

In addition to legislative changes resulting from the passage of the Health Care Reform Law, other legislative changes have been proposed and 

adopted since the Health Care Reform Law was enacted. In August 2011, the Budget Control Act of 2011, among other things, created measures for 
spending reductions by Congress. A Joint Select Committee on Deficit Reduction, tasked with recommending a targeted deficit reduction of at least $1.2 
trillion for the years 2013 through 2021, was unable to reach required goals, thereby triggering the legislation’s automatic reduction to several government 
programs. These changes included aggregate reductions to Medicare payments to providers of up to 2% per fiscal year, which went into effect in April 
2013 and will remain in effect through 2029 unless additional Congressional action is taken. The Coronavirus Aid, Relief, and Economic Security Act, or 
the CARES Act, suspended the 2% Medicare sequester from May 1, 2020 through December 31, 2020, and extended the sequester through 2031. These 
Medicare sequester reductions were suspended through June 2022, with the full 2% cut resuming thereafter. The American Taxpayer Relief Act of 2012, 
among other things, reduced Medicare payments to several providers and increased the statute of limitations period for the government to recover 
overpayments to providers from three to five years. These new laws may result in additional reductions in Medicare and other healthcare funding and 
otherwise affect the prices we may obtain for any of our product candidates for which we may obtain regulatory approval or the frequency with which any 
such product candidate is prescribed or used. Indeed, under current legislation, the actual reductions in Medicare payments may vary up to 4%.

Since enactment of the Health Care Reform Law, there have been, and continue to be, numerous legal challenges and Congressional actions to 

repeal and replace provisions of the law. For example, with enactment of the Tax Cuts and Jobs Act of 2017, or the TCJA, Congress repealed the 
“individual mandate.” The repeal of this provision of the Health Care Reform Law, which requires most Americans to carry a minimal level of health 
insurance, became effective in 2019.  Further, on December 14, 2018, a U.S. District Court judge in the Northern District of Texas ruled that the individual 
mandate portion of the Health Care Reform Law is an essential and inseverable feature of the Health Care Reform Law, and therefore because the mandate 
was repealed as part of the TCJA, the remaining provisions of the Health Care Reform Law are invalid as well. The U.S. Supreme Court heard this case on 
November 10, 2020 and on June 17, 2021, dismissed this action after finding that the plaintiffs do not have standing to challenge the constitutionality of the 
statute.  It is unclear how such litigation and other efforts to repeal and replace the Health Care Reform Law will impact the Health Care Reform Law and 
our business. Litigation and legislation over the Health Care Reform Law are likely to continue, with unpredictable and uncertain results.

Although the previous administration took actions to undermine or delay implementation of the Health Care Reform Law, those policies President 

Biden rescinded those actions with the issuance of an Executive Order on January 28, 2021 which directs federal agencies to reconsider rules and other 
policies that limit Americans’ access to health care, and consider actions that will protect and strengthen that access.  Under this Executive Order, federal 
agencies are directed to re-examine policies that undermine protections for people with pre-existing conditions, including complications related to COVID-
19; demonstrations and waivers under Medicaid and the Health Care Reform Law that may reduce coverage or undermine the programs, including work 
requirements; policies that undermine the Health Insurance Marketplace or other markets for health insurance; policies that make it more difficult to enroll 
in Medicaid and the Health Care Reform Law; and policies that reduce affordability of coverage or financial assistance, including for dependents. This 
Executive Order also directs the U.S. Department of Health and Human Services to create a special enrollment period for the Health Insurance Marketplace 
in response to the COVID-19 pandemic.

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Current and future legislative efforts may limit the prices for our products, if and when they are licensed for marketing and that could materially 
impact our ability to generate revenues.

The prices of prescription pharmaceuticals have been the subject of considerable discussion in the United States. To date, there have been several 

recent U.S. congressional inquiries, as well as proposed and enacted state and federal legislation designed to, among other things, bring more transparency 
to drug pricing, review the relationship between pricing and manufacturer patient programs, reduce the costs of drugs under Medicare and reform 
government program reimbursement methodologies for products. In 2020, CMS issued an interim final rule implementing a most favored nation model for 
prices that would tie Medicare Part B payments for certain physician-administered pharmaceuticals to the lowest price paid in other economically advanced 
countries, effective January 1, 2021. That rule, however, has been subject to a nationwide preliminary injunction and, on December 29, 2021, CMS issued a 
final rule to rescind it. With issuance of this rule, CMS stated that it will explore all options to incorporate value into payments for Medicare Part B 
pharmaceuticals and improve beneficiaries’ access to evidence-based care.

In addition, in October 2020, HHS and the FDA published a final rule allowing states and other entities to develop a Section 804 Importation 
Program, or SIP, to import certain prescription drugs from Canada into the United States. The final rule is currently the subject of ongoing litigation, but at 
least six states (Vermont, Colorado, Florida, Maine, New Mexico, and New Hampshire) have passed laws allowing for the importation of drugs from 
Canada with the intent of developing SIPs for review and approval by the FDA.  Further, on November 20, 2020, HHS finalized 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 final rule would eliminate the current safe harbor for Medicare drug rebates and create new 
safe harbors for beneficiary point-of-sale discounts and pharmacy benefit manager service fees. It originally was set to go into effect on January 1, 2022, 
but with passage of the Inflation Reduction Act has been delayed by Congress to January 1, 2032.

More recently, on August 16, 2022, the Inflation Reduction Act of 2022, or IRA, was signed into law by President Biden.  The new legislation has 
implications for Medicare Part D, which is a program available to individuals who are entitled to Medicare Part A or enrolled in Medicare Part B to give 
them the option of paying a monthly premium for outpatient prescription drug coverage. Among other things, the IRA requires manufacturers of certain 
drugs to engage in price negotiations with Medicare (beginning in 2026), with prices that can be negotiated subject to a cap; imposes rebates under 
Medicare Part B and Medicare Part D to penalize price increases that outpace inflation (first due in 2023); and replaces the Part D coverage gap discount 
program with a new discounting program (beginning in 2025).  The IRA permits the Secretary of HHS to implement many of these provisions through 
guidance, as opposed to regulation, for the initial years.

Specifically, with respect to price negotiations, Congress authorized Medicare to negotiate lower prices for certain costly single-source drug and 

biologic products that do not have competing generics or biosimilars and are reimbursed under Medicare Part B and Part D.  CMS may negotiate prices for 
ten high-cost drugs paid for by Medicare Part D starting in 2026, followed by 15 Part D drugs in 2027, 15 Part B or Part D drugs in 2028, and 20 Part B or 
Part D drugs in 2029 and beyond.  This provision applies to drug products that have been approved for at least 9 years and biologics that have been licensed 
for 13 years, but it does not apply to drugs and biologics that have been approved for a single rare disease or condition.  Nonetheless, since CMS may 
establish a maximum price for these products in price negotiations, we would be fully at risk of government action if our products are the subject of 
Medicare price negotiations.  Moreover, given the risk that could be the case, these provisions of the IRA may also further heighten the risk that we would 
not be able to achieve the expected return on our drug products or full value of our patents protecting our products if prices are set after such products have 
been on the market for nine years.

Accordingly, while it is currently unclear how the IRA will be effectuated, we cannot predict with certainty what impact any federal or state health 

reforms will have on us, but such changes could impose new or more stringent regulatory requirements on our activities or result in reduced reimbursement 
for our products, any of which could adversely affect our business, results of operations and financial condition.

At the state level, individual states are increasingly aggressive in passing legislation and implementing regulations designed to control 

pharmaceutical and biological product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and 
marketing cost disclosure and transparency measures, and, in some cases, designed to encourage importation from other countries and bulk purchasing. In 
addition, regional health care authorities and individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and 
which suppliers will be included in their prescription drug and other health care programs. These measures could reduce the ultimate demand for our 
products, if approved, or put pressure on our product pricing. We expect that additional state and federal healthcare reform measures will 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 our product candidates or additional pricing pressures.

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It is likely that federal and state legislatures within the United States and foreign governments will continue to consider changes to existing health 

care legislation. We cannot predict the reform initiatives that may be adopted in the future or whether initiatives that have been adopted will be repealed or 
modified. The continuing efforts of the government, insurance companies, managed care organizations and other health care payors of to contain or reduce 
costs of health care may adversely affect:

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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 revenue and achieve or maintain profitability; and

the level of taxes that we are required to pay.

Finally, in the European Union, similar political, economic and regulatory developments may affect our ability to profitably commercialize our 
product candidates, if approved. In addition to continuing pressure on prices and cost containment measures, legislative developments at the European 
Union or member state level may result in significant additional requirements or obstacles that may increase our operating costs. The delivery of healthcare 
in the European Union, including the establishment and operation of health services and the pricing and reimbursement of medicines, is almost exclusively 
a matter for national, rather than European Union, law and policy. National governments and health service providers have different priorities and 
approaches to the delivery of healthcare and the pricing and reimbursement of products in that context. In general, however, the healthcare budgetary 
constraints in most European Union member states have resulted in restrictions on the pricing and reimbursement of medicines by relevant health service 
providers. Coupled with ever-increasing European Union and national regulatory burdens on those wishing to develop and market products, this could 
prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our ability to commercialize our 
product candidates, if approved.

In markets outside of the United States and the European Union, reimbursement and healthcare payment systems vary significantly by country, and 

many countries have instituted price ceilings on specific products and therapies. We cannot predict the likelihood, nature or extent of government 
regulation that may arise from future legislation or administrative action in the United States, the European Union or any other jurisdiction. If we or any 
third parties we may engage are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we or 
such third parties are not able to maintain regulatory compliance, our product candidates may lose any regulatory approval that may have been obtained and 
we may not achieve or sustain profitability.

Our relationships with customers, physicians and third-party payors will be subject, directly or indirectly, to federal and state health care fraud and 
abuse laws, false claims laws, health information privacy and security laws, and other health 

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care laws and regulations. If we are unable to comply, or have not fully complied, with such laws, we could face substantial penalties.

If we obtain FDA approval for our current or future candidates and begin commercializing one or more of those products in the United States, our 

operations will be directly or indirectly through our prescribers, customers and purchasers, subject to various federal and state fraud and abuse laws and 
regulations, including, without limitation, the federal Health Care Program Anti-Kickback Statute, the federal civil and criminal laws and the Physician 
Payment Sunshine Act and regulations. These laws will impact, among other things, our proposed sales, marketing and educational programs. In addition, 
we may be subject to patient privacy laws by both the federal government and the states in which we conduct our business. The laws that will affect our 
operations include, but are not limited to:

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the federal Health Care Program Anti-Kickback Statute, which prohibits, among other things, persons or entities from knowingly and willfully 
soliciting, receiving, offering or paying any remuneration (including any kickback, bribe or rebate), directly or indirectly, overtly or covertly, in 
cash or in kind, in return for the purchase, recommendation, leasing or furnishing of an item or service reimbursable under a federal health care 
program, such as the Medicare and Medicaid programs. This statute has been interpreted to apply to arrangements between pharmaceutical 
manufacturers on the one hand, and prescribers, purchasers and formulary managers on the other. The Health Care Reform Law amended the 
intent requirement of the federal Anti-Kickback Statute. A person or entity no longer needs to have actual knowledge of this statute or specific 
intent to violate it;

federal civil and criminal false claims laws and civil monetary penalty laws, which prohibit, among other things, individuals or entities from 
knowingly presenting, or causing to be presented, claims for payment or approval from Medicare, Medicaid or other government payors that 
are false or fraudulent. The Health Care Reform Law provides and recent government cases against pharmaceutical and medical device 
manufacturers support the view that Federal Anti-Kickback Statute violations and certain marketing practices, including off-label promotion, 
may implicate the False Claims Act;

HIPAA, which created new federal criminal statutes that prohibit a person from knowingly and willfully executing a scheme or from making 
false or fraudulent statements to defraud any health care benefit program, regardless of the payor (e.g., public or private);

HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH, and its implementing 
regulations, and as amended again by the final HIPAA omnibus rule, Modifications to the HIPAA Privacy, Security, Enforcement, and Breach 
Notification Rules Under HITECH and the Genetic Information Nondiscrimination Act; Other Modifications to HIPAA, published in January 
2013, which imposes certain requirements relating to the privacy, security and transmission of individually identifiable health information 
without appropriate authorization by entities subject to the rule, such as health plans, health care clearinghouses and health care providers;

federal transparency laws, including the federal Physician Payment Sunshine Act, that require certain manufacturers of drugs, devices, 
biologics and medical supplies for which payment is available under Medicare, Medicaid or the Children’s Health Insurance Program, with 
specific exceptions, to report annually to the CMS information related to: (i) payments or other “transfers of value” made to physicians, other 
healthcare professionals and teaching hospitals and (ii) ownership and investment interests held by physicians and their immediate family 
members;

state and foreign law equivalents of each of the above federal laws, state laws that require drug manufacturers to report information related to 
payments and other transfers of value to physicians and other health care providers or marketing expenditures and state laws governing the 
privacy and security of health information in certain circumstances, many of which differ from each other in significant ways and may not have 
the same effect, thus complicating compliance efforts in certain circumstances, such as specific disease states; and

state and foreign laws that govern the privacy and security of health information in some circumstances, many of which differ from each other 
in significant ways and often are not preempted by HIPAA, thus complicating compliance efforts.

Because of the breadth of these laws and the narrowness of the statutory exceptions and safe harbors available, it is possible that some of our 
business activities could be subject to challenge under one or more of such laws. If our operations are found to be in violation of any of the laws described 
above or any other government regulations that apply to us, we may be subject to penalties, including civil and criminal penalties, damages, fines, 
exclusion from participation in government health care programs, such as Medicare and Medicaid, imprisonment and the curtailment or restructuring of our 
operations.

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The risk of our being found in violation of these laws is increased by the fact that many of them have not been fully interpreted by the regulatory 

authorities or the courts, and their provisions are open to a variety of interpretations. Any action against us for violation of these laws, even if we 
successfully defend against it, could cause us to incur significant legal expenses and divert our management’s attention from the operation of our business. 
The shifting compliance environment and the need to build and maintain robust and expandable systems to comply with multiple jurisdictions with 
different compliance and/or reporting requirements increases the possibility that we may run afoul of one or more of the requirements.

We are subject to stringent privacy laws, information security laws, regulations, policies and contractual obligations related to data privacy and security 
and changes in such laws, regulations, policies, contractual obligations and failure to comply with such requirements could subject us to significant 
fines and penalties, which may have a material adverse effect on our business, financial condition or results of operations.

We are subject to data privacy and protection laws and regulations that apply to the collection, transmission, storage and use of personally-
identifying information, which among other things, impose certain requirements relating to the privacy, security and transmission of personal information, 
including comprehensive regulatory systems in the United States, EU and UK. The legislative and regulatory landscape for privacy and data protection 
continues to evolve in jurisdictions worldwide, and there has been an increasing focus on privacy and data protection issues with the potential to affect our 
business. Failure to comply with any of these laws and regulations could result in enforcement action against us, including fines, imprisonment of company 
officials and public censure, claims for damages by affected individuals, damage to our reputation and loss of goodwill, any of which could have a material 
adverse effect on our business, financial condition, results of operations or prospects.

There are numerous U.S. federal and state laws and regulations related to the privacy and security of personal information. In particular, regulations 
promulgated pursuant to HIPAA establish privacy and security standards that limit the use and disclosure of individually identifiable health information, or 
protected health information, and require the implementation of administrative, physical and technological safeguards to protect the privacy of protected 
health information and ensure the confidentiality, integrity and availability of electronic protected health information. Determining whether protected health 
information has been handled in compliance with applicable privacy standards and our contractual obligations can be complex and may be subject to 
changing interpretation. These obligations may be applicable to some or all of our business activities now or in the future.

If we are unable to properly protect the privacy and security of protected health information, we could be found to have breached our contracts. 
Further, if we fail to comply with applicable privacy laws, including applicable HIPAA privacy and security standards, we could face civil and criminal 
penalties. HHS enforcement activity can result in financial liability and reputational harm, and responses to such enforcement activity can consume 
significant internal resources. In addition, state attorneys general are authorized to bring civil actions seeking either injunctions or damages in response to 
violations that threaten the privacy of state residents. We cannot be sure how these regulations will be interpreted, enforced or applied to our operations. In 
addition to the risks associated with enforcement activities and potential contractual liabilities, our ongoing efforts to comply with evolving laws and 
regulations at the federal and state level may be costly and require ongoing modifications to our policies, procedures and systems. 

In 2018, California passed into law the California Consumer Privacy Act, or CCPA, which took effect on January 1, 2020 and imposed many 
requirements on businesses that process the personal information of California residents. Many of the CCPA’s requirements are similar to those found in the 
General Data Protection Regulation, or GDPR, including requiring businesses to provide notice to data subjects regarding the information collected about 
them and how such information is used and shared, and providing data subjects the right to request access to such personal information and, in certain 
cases, request the erasure of such personal information. The CCPA also affords California residents the right to opt-out of “sales” of their personal 
information. The CCPA contains significant penalties for companies that violate its requirements. In November 2020, California voters passed a ballot 
initiative for the California Privacy Rights Act, or CPRA, which went into effect on January 1, 2023 and significantly expanded the CCPA to incorporate 
additional GDPR-like provisions including requiring that the use, retention, and sharing of personal information of California residents be reasonably 
necessary and proportionate to the purposes of collection or processing, granting additional protections for sensitive personal information, and requiring 
greater disclosures related to notice to residents regarding retention of information. The CPRA also created a new enforcement agency – the California 
Privacy Protection Agency – whose sole responsibility is to enforce the CPRA, which will further increase compliance risk. The provisions in the CPRA 
may apply to some of our business activities. In addition, other states, including Virginia, Colorado, Utah, and Connecticut already have passed state 
privacy laws. Virginia’s privacy law also went into effect on January 1, 2023, and the laws in the other three states will go into effect later in the year. Other 
states will be considering these laws in the future, and Congress has also been debating passing a federal privacy law. These 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.

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Similar to the laws in the United States, there are significant privacy and data security laws that apply in Europe and other countries. The collection, 

use, disclosure, transfer, or other processing of personal data, including personal health data, regarding individuals who are located in the EEA, and the 
processing of personal data that takes place in the EEA, is regulated by the GDPR, which went into effect in May 2018 and which imposes obligations on 
companies that operate in our industry with respect to the processing of personal data and the cross-border transfer of such data. The GDPR imposes 
onerous accountability obligations requiring data controllers and processors to maintain a record of their data processing and policies. If our or our 
partners’ or service providers’ privacy or data security measures fail to comply with the GDPR requirements, we may be subject to litigation, regulatory 
investigations, enforcement notices requiring us to change the way we use personal data and/or fines of up to 20 million Euros or up to 4% of the total 
worldwide annual turnover of the preceding financial year, whichever is higher, as well as compensation claims by affected individuals, negative publicity, 
reputational harm and a potential loss of business and goodwill.

The GDPR places restrictions on the cross-border transfer of personal data from the EU to countries that have not been found by the European 

Commission to offer adequate data protection legislation, such as the United States. There are ongoing concerns about the ability of companies to transfer 
personal data from the EU to other countries. In July 2020, the Court of Justice of the European Union, or the CJEU, invalidated the EU-U.S. Privacy 
Shield, one of the mechanisms used to legitimize the transfer of personal data from the EEA to the U.S. The CJEU decision also drew into question the 
long-term viability of an alternative means of data transfer, the standard contractual clauses, for transfers of personal data from the EEA to the U.S. While 
we were not self-certified under the Privacy Shield, this CJEU decision may lead to increased scrutiny on data transfers from the EEA to the U.S. generally 
and increase our costs of compliance with data privacy legislation as well as our costs of negotiating appropriate privacy and security agreements with our 
vendors and business partners. 

Additionally, in October 2022, President Biden signed an executive order to implement the EU-U.S. Data Privacy Framework, which would serve as 
a replacement to the EU-U.S. Privacy Shield. The European Commission initiated the process to adopt an adequacy decision for the EU-U.S. Data Privacy 
Framework in December 2022. It is unclear if and when the framework will be finalized and whether it will be challenged in court. The uncertainty around 
this issue may further impact our business operations in the EU.

Following Brexit, the UK Data Protection Act 2018 applies to the processing of personal data that takes place in the United Kingdom and includes 

parallel obligations to those set forth by GDPR. In relation to data transfers, both the United Kingdom and the EU have determined, through separate 
“adequacy” decisions, that data transfers between the two jurisdictions are in compliance with the UK Data Protection Act and the GDPR, respectively. 
Any changes or updates to these adequacy decisions have the potential to impact our business.  

Beyond GDPR, there are privacy and data security laws in a growing number of countries around the world. While many loosely follow GDPR as a 

model, other laws contain different or conflicting provisions. These laws will impact our ability to conduct our business activities, including both our 
clinical trials and the sale and distribution of commercial products, through increased compliance costs, costs associated with contracting and potential 
enforcement actions.

While we continue to address the implications of the recent changes to data privacy regulations, data privacy remains an evolving landscape at both 

the domestic and international level, with new regulations coming into effect and continued legal challenges, and our efforts to comply with the evolving 
data protection rules may be unsuccessful. It is possible that these laws may be interpreted and applied in a manner that is inconsistent with our practices. 
We must devote significant resources to understanding and complying with this changing landscape. Failure to comply with laws regarding data protection 
would expose us to risk of enforcement actions taken by data protection authorities in the EEA and elsewhere and carries with it the potential for significant 
penalties if we are found to be non-compliant. Similarly, failure to comply with federal and state laws in the United States regarding privacy and security of 
personal information could expose us to penalties under such laws. Any such failure to comply with data protection and privacy laws could result in 
government-imposed fines or orders requiring that we change our practices, claims for damages or other liabilities, regulatory investigations and 
enforcement action, litigation and significant costs for remediation, any of which could adversely affect our business. Even if we are not determined to have 
violated these laws, government investigations into these issues typically require the expenditure of significant resources and generate negative publicity, 
which could harm our business, financial condition, results of operations or prospects.

We are subject to anti-corruption laws, as well as export control laws, customs laws, sanctions laws and other laws governing our operations. If we fail 
to comply with these laws, we could be subject to civil or criminal penalties, other remedial measures and legal expenses, be precluded from developing 
manufacturing and selling certain products outside 

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the United States or be required to develop and implement costly compliance programs, which could adversely affect our business, results of operations 
and financial condition. 

Our operations are subject to anti-corruption laws, including the U.K. Bribery Act 2010, or Bribery Act, the U.S. Foreign Corrupt Practices Act, or 

FCPA, and other anti-corruption laws that apply in countries where we do business and may do business in the future. The Bribery Act, FCPA and these 
other laws generally prohibit us, our officers, and our employees and intermediaries from bribing, being bribed or making other prohibited payments to 
government officials or other persons to obtain or retain business or gain some other business advantage. Compliance with the FCPA, in particular, 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. 

We may in the future operate in jurisdictions that pose a high risk of potential Bribery Act or FCPA violations, and we may participate in 

collaborations and relationships with third parties whose actions could potentially subject us to liability under the Bribery Act, FCPA or local anti-
corruption laws. In addition, we cannot predict the nature, scope or effect of future regulatory requirements to which our international operations might be 
subject or the manner in which existing laws might be administered or interpreted. If we expand our operations outside of the United States, we will need to 
dedicate additional resources to comply with numerous laws and regulations in each jurisdiction in which we plan to operate. 

We are also subject to other laws and regulations governing our international operations, including regulations administered by the governments of 
the United Kingdom and the United States, and authorities in the European Union, including applicable export control regulations, economic sanctions on 
countries and persons, customs requirements and currency exchange regulations, collectively referred to as the Trade Control laws. In addition, various 
laws, regulations and executive orders also restrict the use and dissemination outside of the United States, or the sharing with certain non-U.S. nationals, of 
information classified for national security purposes, as well as certain products and technical data relating to those products. If we expand our presence 
outside of the United States, 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 United States, which could limit our growth potential and increase our 
development costs. 

There is no assurance that we will be completely effective in ensuring our compliance with all applicable anti-corruption laws, including the Bribery 

Act, the FCPA or other legal requirements, including Trade Control laws. If we are not in compliance with the Bribery Act, the FCPA and other anti-
corruption laws or Trade Control laws, we may be subject to criminal and civil penalties, disgorgement and other sanctions and remedial measures, and 
legal expenses, which could have an adverse impact on our business, financial condition, results of operations and liquidity. The Securities and Exchange 
Commission also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA’s accounting provisions. Any 
investigation of any potential violations of the Bribery Act, the FCPA, other anti-corruption laws or Trade Control laws by United Kingdom, U.S. or other 
authorities could also have an adverse impact on our reputation, our business, results of operations and financial condition.

Product liability lawsuits against us could cause us to incur substantial liabilities and could limit commercialization of any product candidate that we 
may develop.

We face an inherent risk of product liability exposure related to the testing of SGT-003 and any of our current and future candidates in preclinical 

studies and clinical trials and may face an even greater risk if we commercialize any product candidate that we may develop. If we cannot successfully 
defend ourselves against claims that our product candidates caused injuries, we could incur substantial liabilities. Regardless of merit or eventual outcome, 
liability claims may result in:

•

•

•

•

•

•

•

decreased demand for any product candidate that we may develop;

loss of revenue;

substantial monetary awards to trial participants or patients;

significant time and costs to defend the related litigation;

withdrawal of clinical trial participants;

the inability to commercialize any of our product candidates; and

injury to our reputation and significant negative media attention.

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Although we maintain product liability insurance coverage, such insurance may not be adequate to cover all liabilities that we may incur. We 
anticipate that we will need to increase our insurance coverage each time we commence a clinical trial and if we successfully commercialize any product 
candidate. Insurance coverage is increasingly expensive. We may not be able to maintain insurance coverage at a reasonable cost or in an amount adequate 
to satisfy any liability that may arise.

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 
generation, handling, use, storage, treatment, manufacture, transportation and disposal of, and exposure to, hazardous materials and wastes, as well as laws 
and regulations relating to occupational health and safety. Our operations involve the use of hazardous and flammable materials, including chemicals and 
viruses and other biologic materials. Our operations also produce hazardous waste products. We generally contract with third parties for the disposal of 
these materials and wastes. We cannot eliminate the risk of contamination or injury from these materials. In the event of contamination or injury resulting 
from our use of hazardous materials, we could be held liable for any resulting damages. We also could incur significant costs associated with civil or 
criminal fines and penalties. We do not carry specific biological or hazardous waste insurance coverage, and our property, casualty and general liability 
insurance policies specifically exclude coverage for damages and fines arising from biological or hazardous waste exposure or contamination. Although we 
maintain workers’ compensation insurance for certain 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 provide adequate coverage against potential liabilities. Accordingly, in the event 
of contamination or injury, we could be held liable for damages or be penalized with fines in an amount exceeding our resources, and our clinical trials or 
regulatory approvals could be suspended.

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

have tended to become more stringent over time. 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 or liabilities.

Our internal computer systems, or those of our collaborators, contractors or consultants, may fail or suffer security breaches, which could result in a 
material disruption of our product development.

Despite the implementation of security measures, our internal computer systems and those of our current and any future collaborators and other 

contractors or consultants are vulnerable to damage from computer viruses, unauthorized access, natural disasters, terrorism, war and telecommunication 
and electrical failures. Such systems are also vulnerable to service interruptions or to security breaches from inadvertent or intentional actions by our 
employees, third-party vendors and/or business partners, or from cyber-attacks by malicious third parties. Cyber-attacks are increasing in their frequency, 
sophistication and intensity, and have become increasingly difficult to detect. Cyber-attacks could include the deployment of harmful malware, 
ransomware, denial-of-service attacks, social engineering and other means to affect service reliability and threaten the confidentiality, integrity and 
availability of information. Cyber-attacks also could include phishing attempts or e-mail fraud to cause payments or information to be transmitted to an 
unintended recipient.

While we are not aware of any such material system failure, accident, cyber-attack or security breach to date, if such an event were to occur and 

cause interruptions in our or our collaborators’, contractors’ or consultants’ operations, it could result in a material disruption of our development programs 
and our business operations, whether due to a loss of our trade secrets or other proprietary information or other similar disruptions. For example, the loss of 
clinical trial data from preclinical studies or clinical trials could result in delays in our regulatory approval efforts and significantly increase our costs to 
recover or reproduce the data. 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, our competitive position could be harmed and the further 
development and commercialization of our current and other future candidates could be delayed. 

Risks related to our intellectual property 

We heavily rely on certain in-licensed patents and other intellectual property rights in connection with our development of SGT-003, AVB-202-TT, 
AVB-401 and other future candidates and may be required to acquire or license additional 

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patents or other intellectual property rights to continue to develop and commercialize SGT-003 and other future candidates.

Our ability to develop and commercialize SGT-003, AVB-202-TT, AVB-401 and other future product candidates is heavily dependent on licenses to 

patent rights and other intellectual property granted to us by third parties. In particular, we have licensed certain patents and patent applications from the 
University of Missouri, the University of Washington and others that are important or necessary to the development of SGT-003 and other elements of our 
gene transfer program. AavantiBio also licensed certain patents and patent applications from third parties that are important or necessary to the 
development of AVB-202-TT and other elements of AavantiBio’s gene transfer program that we acquired. Our existing license agreements impose, and we 
expect that future license agreements will impose, various diligence, development and commercialization obligations, milestone payments, royalties and 
other obligations on us. If we fail to comply with our obligations under our agreements, we may be subject to damages, which may be significant, and the 
licensor may have the right to terminate the license, in which event we may not be able to develop or market product candidates or technologies covered by 
the license, including SGT-003, AVB-202-TT or AVB-401. In addition, certain of these license agreements are not assignable by us without the consent of 
the respective licensor, which may have an adverse effect on our ability to engage in certain transactions.

Under our existing license agreements, we do not have, and under future license agreements we may not have, the right to control the preparation, 

filing and prosecution of patent applications, or the maintenance, enforcement and defense of the patents and patent applications that we license from third 
parties. For example, under our inbound license agreements with the University of Missouri and the University of Washington, each of the applicable 
licensors controls the prosecution of patent applications and the maintenance of patents and patent applications. Therefore, we cannot be certain that the 
licensed patents and applications will be prosecuted, maintained, enforced and defended in a manner consistent with the best interests of our business. If 
our licensors fail to maintain, enforce or defend such patents, or lose rights to those patents or patent applications, the rights we have licensed may be 
reduced or eliminated and our right to develop and commercialize any of our product candidates that are the subject of such licensed rights, including SGT-
003 and AVB-202-TT, could be adversely affected. For more information, see Part I, Item 1, “Business—Strategic partnerships and collaborations/licenses” 
of this Annual Report on Form 10-K.

Moreover, licenses to additional third-party intellectual property, technology and materials may be required for our development programs but may 

not be available in the future or may not be available on commercially reasonable terms. For example, third parties may claim that the microdystrophin 
constructs and the AAV vectors we are developing for use in SGT-003 or other current and future candidates are covered by patents held by them. We 
believe that we would have valid defenses to any such claims; however, if any such claims were ultimately successful, we might require a license to 
continue to use and sell SGT-003, or other current and future product candidates and such AAV vectors. Such licenses may not be available on 
commercially reasonable terms, or at all. The licensing or acquisition of third-party intellectual property rights is a competitive area, and several more 
established companies may pursue strategies to license or acquire third-party intellectual property rights that we may consider attractive. These established 
companies may have a competitive advantage over us due to their size, capital resources and greater clinical development and commercialization 
capabilities. In addition, companies that perceive us to be a competitor may be unwilling to assign or license rights to us. We also may be unable to license 
or acquire third-party intellectual property rights on terms that would allow us to make an appropriate return on our investment. Moreover, even if we are 
able to obtain such licenses, they may only be non-exclusive, which could permit competitors and other third parties to use the same intellectual property in 
competition with us. 

We may collaborate with non-profit and academic institutions to accelerate our preclinical research or development under written agreements with 
these institutions. These institutions may 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 required 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 other parties, potentially blocking our ability to pursue our program.

If we are unable to successfully obtain rights, or successfully challenge such rights, to any third-party intellectual property rights that are required 
for the development and commercialization of SGT-003, AVB-202-TT, AVB-401 or any of our other future candidates, and such third-party intellectual 
property rights are successfully asserted against us, we may be liable for damages, which may be significant, and we may be required to cease the 
development and commercialization of SGT-003, AVB-202-TT, AVB-401 or other future candidates.

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If we are unable to obtain and maintain patent protection for our product candidates, or if the scope of the patent protection obtained is not sufficiently 
broad, our competitors could develop and commercialize products similar or identical to ours, and our ability to successfully commercialize our product 
candidates may be adversely affected.

Our success depends, in large part, on our and our licensors’ ability to seek, obtain, maintain, enforce and defend patent rights in the United States 

and other countries with respect to SGT-003, AVB-202-TT, AVB-401, other future product candidates and our future innovation related to our 
manufacturing technology. Our licensors and we have sought, and we intend to continue to seek, to protect our proprietary position by filing patent 
applications in the United States and, in at least some cases, one or more countries outside the United States related to SGT-003, AVB-202-TT, AVB-401 
and other future product candidates that are important to our business. However, we cannot predict whether the patent applications we and our licensors are 
currently pursuing will issue as patents or whether the claims of any issued patents will provide us with a competitive advantage.

Moreover, although we have pending patent applications in the United States and abroad, we cannot predict whether or in which jurisdictions the 

pending applications will result in issuance of patents that effectively protect any of our product candidates or will effectively prevent others from 
commercializing competitive products. Further, each of the provisional patent applications is not eligible to become an issued patent until, among other 
things, we file a non-provisional patent application within 12 months of the filing date of each provisional patent application. If we do not timely file a non-
provisional patent application in respect of a provisional patent application, we may lose our priority date with respect to such provisional patent 
application and any patent protection on the inventions disclosed in such provisional patent application. While we intend to timely file non-provisional 
patent applications relating to our provisional patent applications, we cannot predict whether such future patent applications will result in the issuance of 
patents that effectively protect any of our product candidates or will effectively prevent others from commercializing competitive products.

We may not be able to file, prosecute, maintain, enforce, defend or license all patents that are necessary to our business.

The patent prosecution process is expensive, time-consuming and complex, and we and our licensors may not be able to file, prosecute, maintain, 

enforce, defend or license all necessary or desirable patents and patent applications at a reasonable cost or in a timely manner.

It is also currently unknown what claims may, if ever, issue from pending applications included in our patent rights. Additionally, certain of our in-

licensed U.S. patent rights lack corresponding foreign patents or patent applications, and therefore we will be unable to obtain patent protection for our 
product candidates in certain jurisdictions. We or our licensors may not be able to obtain or maintain patent protection with respect to SGT-003, AVB-202-
TT, AVB-401 or other future product candidates.

Changes in either the patent laws or their interpretation in the United States and other countries may diminish our ability to protect our inventions, 

obtain, maintain and enforce our intellectual property rights, and more generally, could affect the value of our intellectual property rights or narrow the 
scope of our licensed patents or future owned patents. 

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. Although we enter into non-disclosure and confidentiality agreements with parties who have access to confidential or patentable aspects of our 
research and development output, such as our employees, corporate collaborators, outside scientific collaborators, CROs, contract manufacturers, 
consultants, advisors and other third parties, any of these parties may breach the agreements and disclose such output before a patent application is filed, 
thereby jeopardizing our ability to seek patent protection.

The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and 

has, in recent years, been the subject of much litigation. As a result, the issuance, scope, validity, enforceability and commercial value of our patent rights 
are highly uncertain. Patent applications included in our current and future patent rights may not result in patents being issued that protect our product 
candidates, effectively prevent others from commercializing competitive products or otherwise provide any competitive advantage. In fact, patent 
applications may not issue as patents at all. Even assuming patents issue from patent applications in which we have rights, changes in either the patent laws 
or interpretation of the patent laws in the United States and other jurisdictions may diminish the value of our patents or narrow the scope of our patent 
protection.

Other parties have developed products that may be related or competitive to our own and such parties may have filed or may file patent applications, 

or may have received or may receive patents, claiming inventions that may overlap or conflict with those claimed in our patent applications or issued 
patents. We may not be aware of all third-party intellectual property rights potentially relating to SGT-003, AVB-202-TT, AVB-401 or our other future 
product candidates. In addition, we cannot provide any assurances that any of the inventions disclosed in our patent applications will be found to be 
patentable, including over third-party or our own prior art patents, publications or other disclosures, or will issue as patents. Even if our 

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patent applications issue as patents, we cannot provide any assurances that such patents will not be challenged or ultimately held to be invalid or 
unenforceable. Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and 
in other jurisdictions are typically not published until 18 months after filing, or, in some cases, at all. Therefore, we cannot know with certainty whether the 
inventors of our licensed patents and applications were the first to make the inventions claimed in those patents or pending patent applications, or that they 
were the first to file for patent protection of such inventions. Similarly, should we own any issued patents or patent applications in the future, we may not 
be certain that we were the first to file for patent protection for the inventions claimed in such patents or patent applications. Furthermore, given the 
differences in patent laws in the United States, Europe and other foreign jurisdictions, for example, the availability of grace periods for filing patent 
applications and what can be considered as prior art, we cannot make any assurances that any claims in our pending and future patent applications in the 
United States or other jurisdictions will issue, or if they do issue, whether they will issue in a form that provides us with any meaningful competitive 
advantage. Similarly, we cannot make any assurances that if the patentability, validity, enforceability or scope of our pending or future patents and patent 
applications in the United States or foreign jurisdictions are challenged by any third party, that the claims of such pending or future patents and patent 
applications will survive any such challenge in a form that provides us with any meaningful competitive advantage. For example, we are aware of certain 
third-party patents and publications related to certain microdystrophin constructs. While we believe that our owned or in-licensed patents and patent 
applications claim novel and non-obvious features of microdystrophin constructs that are not described in such third-party patents or publications, such 
third-party patents and publications may have earlier priority or publication dates and may be asserted as prior art against our owned or in-licensed patents 
and applications. Any such challenge, if successful, could limit or eliminate patent protection for our products and product candidates or otherwise 
materially harm our business. As a result, the issuance, scope, validity, enforceability and commercial value of our patent rights cannot be predicted with 
any certainty.

Moreover, the coverage claimed in a patent application can be significantly reduced before the patent is issued, and its scope can be reinterpreted 
after issuance. Even if patent applications we license or may own in the future do issue as patents, they may not issue in a form that will provide us with 
any meaningful protection, prevent competitors or other third parties from competing with us or otherwise provide us with any competitive advantage. Any 
patents that we license or may own in the future may be challenged, narrowed, circumvented, or invalidated by third parties. Consequently, we do not know 
whether any of our product candidates will be protectable or remain protected by valid and enforceable patents. Our competitors or other third parties may 
be able to circumvent our patents by developing similar or alternative products in a non-infringing manner.

The degree of patent protection we require to successfully compete in the marketplace may be unavailable. We cannot provide any assurances that 
any of the patents or patent applications included in our patent rights include or will include claims with a scope sufficient to protect SGT-003, AVB-202-
TT, AVB-401 and other future product candidates or otherwise provide any competitive advantage. In addition, the laws of foreign countries may not 
protect our proprietary rights to the same extent as the laws of the United States. Furthermore, patents have a limited lifespan. In the United States, the 
natural expiration of a patent is generally twenty years after it is filed. Certain extensions may be available, however, the life of a patent, and the protection 
it affords, is limited. Given the amount of time required for the development, testing and regulatory review of new product candidates, patents protecting 
such candidates might expire before or shortly after such candidates are commercialized. As a result, our patent rights may not provide us with adequate 
and continuing patent protection sufficient to exclude others from commercializing products similar or identical to our product candidates, including 
biosimilar versions of such products.

Our licensed patents, and any patents we may own in the future, may be challenged, narrowed, invalidated or held unenforceable.

Even if we acquire patent protection that we expect should enable us to maintain some competitive advantage, third parties, including competitors, 

may challenge the validity, enforceability or scope thereof, which may result in such patents being narrowed, invalidated or held unenforceable. In 
litigation, a competitor could claim that our in-licensed patents or any patents we may own in the future are not valid or enforceable for a number of 
reasons. If a court agrees, we would lose our rights to those challenged patents. Third parties also may raise similar claims before administrative bodies in 
the United States or abroad, even outside the context of litigation. Such proceedings could result in the revocation or cancellation of or amendment to our 
licensed patents and any patents we may own in the future in such a way that they no longer cover SGT-003, AVB-202-TT, AVB-401 or other future 
product candidates.

Even if issued, the issuance of a patent is not conclusive as to its inventorship, scope, validity or enforceability, and our current and future patent 
rights may be challenged in the courts or patent offices in the United States and abroad. For example, we may be subject to a third-party submission of 
prior art to the U.S. Patent and Trademark Office, or USPTO, challenging the validity of one or more claims of patents included in our patent rights. Such 
submissions may also be made 

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prior to a patent’s issuance, precluding the granting of a patent based on one of the pending patent applications included in our patent rights. We may 
become involved in opposition, derivation, revocation, reexamination, post-grant and inter partes review, or interference proceedings challenging one or 
more patents included in our patent rights. For example, competitors may claim that they invented the inventions claimed in patents or patent applications 
included in our patent rights, such as the microdystrophin we use in SGT-003, prior to the inventors of such patents or patent applications, or may have 
filed one or more patent applications before the filing of the patents or patent applications included in our patent rights. A competitor who can establish an 
earlier filing or invention date may also assert that we are infringing their patents and that we therefore cannot practice our technology related to our 
product candidates as claimed in the patents or patent applications included in our patent rights. Competitors may also contest patents or patent applications 
included in our patent rights by showing that the claimed subject matter was not patent-eligible, was not novel or was obvious or that the patent claims 
failed any other requirement for patentability or enforceability. In addition, we may in the future be subject to claims by our or our licensors’ current or 
former employees or consultants asserting an ownership right in the patents or patent applications included in our patent rights as an inventor or co-
inventor, as a result of the work they performed.

An adverse determination in any such submission or proceeding may result in loss of exclusivity or freedom to operate or in patent claims being 

narrowed, invalidated or held unenforceable, in whole or in part, which could limit our ability to stop others from using or commercializing similar 
therapeutics, without payment to us, or could limit the duration of the patent protection covering our product candidates. Such challenges may also result in 
our inability to manufacture or commercialize our product candidates without infringing third-party patent rights, and we may be required to obtain a 
license from third parties, which may not be available on commercially reasonable terms or at all, or we may need to cease the development, manufacture 
and commercialization of one or more of our product candidates. In addition, if the breadth or strength of protection provided by the patents and patent 
applications included in our patent rights is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current 
or future product candidates. Such proceedings also may result in substantial cost and require significant time from our scientists and management, even if 
the eventual outcome is favorable to us.

Even if they are unchallenged, the patents and pending patent applications included in our patent rights may not provide us with any meaningful 

protection or prevent competitors from designing around our patent claims to circumvent our patent rights by developing similar or alternative therapeutics 
in a non-infringing manner. For example, a third party may develop a competitive therapeutic that provides benefits similar to one or more of our product 
candidates but that uses a vector or an expression construct that falls outside the scope of our patent protection. If the patent protection provided by the 
patents and patent applications we license or pursue with respect to our product candidates is not sufficiently broad to impede such competition, our ability 
to successfully commercialize our product candidates could be negatively affected.

Our intellectual property licenses with third parties may be subject to disagreements over contract interpretation, which could narrow the scope of our 
rights to the relevant intellectual property or technology or increase our financial or other obligations to our licensors.

We currently depend, and will continue to depend, on our license, collaboration and other similar agreements. Further development and 
commercialization of SGT-003, AVB-202-TT, AVB-401, our other future candidates and platform technologies may require us to enter into additional 
license, collaboration or other similar agreements. The agreements under which we currently license intellectual property or technology from third parties 
are complex, and certain provisions in such agreements may be susceptible to multiple interpretations. The resolution of any contract interpretation 
disagreement that may arise could narrow what we believe to be the scope of our rights to the relevant intellectual property or technology, impact our 
ability to sublicense the relevant intellectual property or technology, or increase what we believe to be our financial or other obligations under the relevant 
agreement. Moreover, if disputes over intellectual property that we have licensed prevent or impair our ability to maintain our current licensing 
arrangements on commercially acceptable terms, we may be unable to successfully develop and commercialize the affected product candidates.

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If any of our licenses or material relationships are terminated or breached, we may:

•

•

•

•

•

lose our rights to develop and market SGT-003, AVB-202-TT, AVB-401 or other future candidates; 

lose patent protection for SGT-003, AVB-202-TT, AVB-401 or other future candidates; 

experience significant delays in the development or commercialization of SGT-003, AVB-202-TT, AVB-401 or other future candidates; 

not be able to obtain any other licenses on acceptable terms, if at all; or 

incur liability for damages.

These risks apply to any agreements that we may enter into in the future for SGT-003, AVB-202-TT, AVB-401 and our other future candidates.

If we fail to comply with our obligations in the agreements under which we license intellectual property rights from third parties or otherwise 
experience disruptions to our business relationships with our licensors, we could lose license rights that are important to our business.

We have certain obligations under licensing agreements with third parties that include annual maintenance fees and payments that are contingent 

upon achieving various development, commercial and regulatory milestones. Pursuant to many of these license agreements, we are required to make 
milestone payments if certain development, regulatory and commercial sales milestones are achieved, and may have certain additional research funding 
obligations. Also, pursuant to the terms of many of these license agreements, when and if commercial sales of a licensed product commence, we must pay 
royalties to our licensors on net sales of the respective licensed products.

We have entered into license agreements with third parties and may need to obtain additional licenses from one or more of these same third parties 
or from others to advance our research or allow our commercialization of SGT-003, AVB-202-TT or other future candidates. It is possible that we may be 
unable to obtain additional licenses at a reasonable cost or on reasonable terms, if at all. In that event, we may be required to expend significant time and 
resources to redesign SGT-003, AVB-202-TT other future candidates or the methods for manufacturing them or to develop or license replacement products, 
all of which may not be feasible on a technical or commercial basis. If we are unable to do so, we may be unable to develop or commercialize SGT-003, 
AVB-202-TT or other future candidates. We cannot provide any assurances that third-party patents or other intellectual property rights do not exist that 
might be enforced against our manufacturing methods, product candidates or any technologies we may develop, resulting in either an injunction prohibiting 
our manufacture or sales, or, with respect to our sales, an obligation on our part to pay royalties and/or other forms of compensation to third parties.

In each of our existing license agreements, and we expect in our future agreements, patent prosecution of our licensed technology is controlled 

solely by the licensor, and we may be required to reimburse the licensor for their costs of patent prosecution. If our licensors fail to obtain and maintain 
patent or other protection for the proprietary intellectual property we license from them, we could lose our rights to the intellectual property or our 
exclusivity with respect to those rights, and our competitors could market competing products using the intellectual property. Further, in certain of our 
license agreements our licensors have the first right to bring any actions against any third party for infringing on the patents we have licensed. Our license 
agreements also require us to meet development thresholds to maintain the license, including establishing a set timeline for developing and 
commercializing product candidates. Disputes may arise regarding intellectual property subject to our licensing agreements, including:

•

•

•

•

•

•

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

the extent to which our products or processes infringe on intellectual property of the licensor that is not subject to the licensing agreement;

the sublicensing of patent and other rights under our collaborative development relationships;

our diligence obligations under the license agreement and what activities satisfy those diligence obligations;

the inventorship or ownership of inventions and know-how resulting from the joint creation or use of intellectual property by our licensors and 
us and our partners; and

the priority of invention of licensed patented inventions.

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 SGT-003, AVB-202-TT or other future candidates. In spite of our best 
efforts, our licensors might conclude that we have materially breached 

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our license agreements and might therefore terminate the license agreements, thereby resulting in disputes or litigation, which could cause us to incur 
substantial costs and distract management’s time, and if we are unsuccessful, we could lose our ability to develop and commercialize products covered by 
these license agreements. If these licenses are ultimately terminated by the licensor, or if the underlying patents fail to provide the intended exclusivity, 
competitors would have the freedom to seek regulatory approval of, and to market, products identical to ours.

Third parties may initiate legal proceedings alleging that we are infringing, misappropriating or otherwise violating their intellectual property rights, 
the outcome of which would be uncertain and could have a material adverse effect on the success of our business.

Our commercial success depends upon our ability and the ability of our future collaborators to develop, manufacture, market and sell SGT-003, 

AVB-202-TT, AVB-401 or other future candidates without infringing, misappropriating or otherwise violating the proprietary rights and intellectual 
property of third parties. The biotechnology and pharmaceutical industries are characterized by extensive and complex litigation regarding patents and 
other intellectual property rights. We or our licensors may in the future become party to, or be threatened with, adversarial proceedings or litigation 
regarding intellectual property rights with respect to SGT-003, AVB-202-TT, AVB-401 or other future candidates, including interference proceedings, post 
grant review and inter partes review before the USPTO. Our competitors or other third parties may assert infringement claims against us, alleging that, 
among other things, our therapeutics, manufacturing methods, formulations or administration methods are covered by their patents.

Given the vast number of patents in our field of technology, we cannot be certain or guarantee that a court would hold that SGT-003, AVB-202-TT, 

AVB-401 or any of our other future candidates do not infringe an existing patent or a patent that may be granted in the future. Many companies and 
institutions have filed, and continue to file, patent applications related to gene therapy and related manufacturing methods. Some of these patent 
applications have already been allowed or issued and others may issue in the future. Since this area is competitive and of strong interest to pharmaceutical 
and biotechnology companies, there will likely be additional patent applications filed and additional patents granted in the future, as well as additional 
research and development programs expected in the future. Furthermore, because patent applications can take many years to issue, may be confidential for 
18 months or more after filing and can be revised before issuance, there may be applications now pending that may later result in issued patents that may be 
infringed by the manufacture, use, sale or importation of our product candidates and we may or may not be aware of such patents. If a patent holder 
believes the manufacture, use, sale or importation of one of our product candidates infringes its patent, the patent holder may sue us even if we have 
licensed other patent protection for our product candidates. Moreover, we may face patent infringement claims from non-practicing entities that have no 
relevant product revenue and against whom our licensed patent portfolio may therefore have no deterrent effect.

It is also possible that we have failed to identify relevant third-party patents or applications for which we may need a license to develop and 

commercialize SGT-003, AVB-202-TT, AVB-401 and other future candidates. For example, applications filed before November 29, 2000, and certain 
applications filed after that date that will not be filed outside the United States remain confidential until patents issue. Moreover, it is difficult for industry 
participants, including us, to identify all third-party patent rights that may be relevant to our product candidates because patent searching is imperfect due to 
differences in terminology among patents, incomplete databases and the difficulty in assessing the meaning of patent claims. We may fail to identify 
relevant patents or patent applications or may identify pending patent applications of potential interest but incorrectly predict the likelihood that such patent 
applications may issue with claims of relevance to our product candidates. In addition, we may be unaware of one or more issued patents that would be 
infringed by the manufacture, sale or use of a current or future product candidate, or we may incorrectly conclude that a third-party patent is invalid, 
unenforceable or not infringed by our activities. Additionally, pending patent applications that have been published can, subject to certain limitations, be 
later amended in a manner that could cover our product candidates.

Third parties may assert infringement claims against us based on existing patents or patents that may be granted in the future, regardless of their 

merit. There is a risk that third parties may choose to engage in litigation with us to enforce or to otherwise assert their patent or other intellectual property 
rights against us. For example, third parties may claim that the microdystrophin or the AAV vectors we are developing for use in SGT-003, AVB-202-TT, 
AVB-401 or other future candidates are covered by patents held by them. Even if we believe such claim, or other intellectual property claims alleged by 
third parties, are without merit, there is no assurance that we would be successful in defending such claims. A court of competent jurisdiction could hold 
that these third-party patents are valid, enforceable and infringed, which could materially and adversely affect our ability to commercialize SGT-003, AVB-
202-TT, AVB-401 or other future candidates covered by the asserted third-party patents. In order to successfully challenge the validity of any such U.S. 
patent in federal court, we would need to overcome a presumption of validity. As this burden is a high one requiring us to present clear and convincing 
evidence as to the invalidity of any such U.S. patent claim, there is no assurance that a court of competent jurisdiction would 

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invalidate the claims of any such U.S. patent. Similarly, there is no assurance that a court of competent jurisdiction would find that SGT-003, AVB-202-TT, 
AVB-401 or other future product candidates did not infringe a third-party patent. 

Patent and other types of intellectual property litigation can involve complex factual and legal questions, and their outcome is uncertain. If we are 

found, or believe there is a risk that we may be found, to infringe, misappropriate or otherwise violate a third party’s intellectual property rights, and we are 
unsuccessful in demonstrating that such intellectual property rights are invalid or unenforceable, we could be required or may choose to obtain a license 
from such third party to continue developing, manufacturing and marketing our product candidates. However, we may not be able to obtain any required 
license on commercially reasonable terms or at all. Even if we were able to obtain a license, it could be non-exclusive, thereby giving our competitors and 
other third parties access to the same technologies licensed to us, and it could require us to make substantial licensing and royalty payments. We could be 
forced, including by court order, to cease developing, manufacturing and commercializing the infringing product candidate, including SGT-003, AVB-202-
TT, AVB-401 or other future candidates. In addition, we could be found liable for monetary damages, including treble damages and attorneys’ fees, if we 
are found to have willfully infringed a patent or other intellectual property right. A finding of infringement, misappropriation or other violation of 
intellectual property rights, or claims that we have done so, could prevent us from manufacturing and commercializing our product candidates or force us to 
cease some or all of our business operations.

Intellectual property litigation could cause us to spend substantial resources and distract our personnel from their normal responsibilities.

Litigation or other legal proceedings relating to intellectual property claims, with or without merit, is unpredictable and generally expensive and 

time-consuming. Competitors may infringe patents that we may own in the future or the patents of our licensing partners or we may be required to defend 
against claims of infringement. Even if resolved in our favor, 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. 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 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. Such litigation or proceedings could substantially increase our operating losses and reduce the resources available for 
development activities or any future sales, marketing or distribution 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 greater financial resources and more mature and 
developed intellectual property portfolios. Accordingly, despite our efforts, we may not be able to prevent third parties from infringing or misappropriating 
or successfully challenging our intellectual property rights. Uncertainties resulting from the initiation and continuation of patent litigation or other 
proceedings could have a material adverse effect on our ability to compete in the marketplace.

Obtaining and maintaining our patent protection depends on compliance with various procedural, document submission, fee payment and other 
requirements imposed by government patent agencies, and our patent protection could be reduced or eliminated for non-compliance with these 
requirements.

Periodic maintenance fees, renewal fees, annuity fees and various other government fees on patents and/or applications will be due to be paid to the 
USPTO and various government patent agencies outside of the United States over the lifetime of our licensed patents and applications and any patents and 
patent applications we may own in the future. The USPTO and various non-U.S. government patent agencies require compliance with several procedural, 
documentary, fee payment and other similar provisions during the patent application process. We employ reputable intellectual property law firms and other 
professionals to help us comply and we are also dependent on our licensors to take the necessary action to comply with these requirements with respect to 
our licensed intellectual property. In many cases, an inadvertent lapse can be cured by payment of a late fee or by other means in accordance with the 
applicable rules. There are situations, however, in which non-compliance 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. In such an event, potential competitors might be able to enter the market and this 
circumstance could have a material adverse effect on our business.

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Some intellectual property that we have in-licensed may have been discovered through government-funded programs and thus may be subject to federal 
regulations such as “march-in” rights, certain reporting requirements, and a preference for U.S. manufacturing. Compliance with such regulations 
may limit our exclusive rights, and limit our ability to contract with non-U.S. manufacturers.

Some of the intellectual property rights we have licensed, including such rights licensed from the University of Missouri, the University of 
Washington and the University of Florida, are stated to have been generated through the use of U.S. government funding and may therefore be subject to 
certain federal regulations. As a result, the U.S. government may have certain rights to intellectual property embodied in our current or future product 
candidates pursuant to the Bayh-Dole Act of 1980, or Bayh-Dole Act. These U.S. government rights in certain inventions developed under a government-
funded program include a non-exclusive, non-transferable, irrevocable worldwide license to use inventions for any governmental purpose. In addition, the 
U.S. government has the right to require us to grant exclusive, partially exclusive or non-exclusive licenses to any of these inventions to a third party if it 
determines that: (i) adequate steps have not been taken to commercialize the invention, (ii) government action is necessary to meet public health or safety 
needs or (iii) government action is necessary to meet requirements for public use under federal regulations (also referred to as “march-in rights”). The U.S. 
government also has the right to take title to these inventions if we, or the applicable licensor, fail to disclose the invention to the government and fail to file 
an application to register the intellectual property within specified time limits. Intellectual property generated under a government funded program is also 
subject to certain reporting requirements, compliance with which may require us or the applicable licensor to expend substantial resources. In addition, the 
U.S. government requires that any products embodying the subject invention or produced through the use of the subject invention be manufactured 
substantially in the United States. The manufacturing preference requirement can be waived if the owner of the intellectual property can show that 
reasonable but unsuccessful efforts have been made to grant licenses on similar terms to potential licensees that would be likely to manufacture 
substantially in the United States or that under the circumstances domestic manufacture is not commercially feasible. This preference for U.S. 
manufacturers may limit our ability to contract with non-U.S. product manufacturers for products covered by such intellectual property. To the extent any 
of our current or future intellectual property is generated through the use of U.S. government funding, the provisions of the Bayh-Dole Act may similarly 
apply.

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

Filing, prosecuting, maintaining, enforcing 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 United States could be less extensive than those in the United States. Although 
our license agreements grant us worldwide rights, certain of our in-licensed U.S. patents lack corresponding foreign patents or patent applications. For 
example, the laws of some foreign countries do not protect intellectual property rights to the same extent as federal and state laws in the United States even 
in jurisdictions where we and our licensors pursue patent protection. Consequently, we and our licensors may not be able to prevent third parties from 
practicing our inventions in all countries outside the United States, even in jurisdictions where we and our licensors pursue patent protection, or from 
selling or importing products made using our inventions in and into the United States or other jurisdictions. Competitors may use our inventions in 
jurisdictions where we and our licensors have not pursued and obtained patent protection to develop their own products and may export otherwise 
infringing products to territories where we have patent protection, but where enforcement is not as strong as it is in the United States. These products may 
compete with our product candidates and our patents 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 
rights, particularly those relating to biotechnology products, which could make it difficult for us to stop the infringement of our patents, if pursued and 
obtained, or the marketing of competing products in violation of our intellectual property and proprietary rights generally. Proceedings to enforce our 
intellectual property and proprietary rights in foreign jurisdictions could (i) result in substantial costs and divert our efforts and attention from other aspects 
of our business, (ii) put our patents at risk of being invalidated or interpreted narrowly and our patent applications at risk of not issuing and (iii) 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.

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

In addition to the protection afforded by patents, we rely on trade secret protection and confidentiality agreements to protect proprietary know-how 

that is not patentable or that we elect not to patent, processes for which patents are difficult to enforce and any other elements of the discovery and 
development processes of SGT-003, AVB-202-TT, AVB-401 and other future candidates that involve proprietary know-how, information or technology that 
is not covered by patents. Aspects of our manufacturing process are protected by trade secrets. However, trade secrets can be difficult to protect and some 
courts inside and outside the United States are less willing or unwilling to protect trade secrets.

We seek to protect our proprietary know-how, trade secrets and processes, in part, by entering into confidentiality agreements and, if applicable, 

material transfer agreements, consulting agreements or other similar agreements with our employees, consultants, scientific advisors, CROs, manufacturers 
and contractors. These agreements typically limit the rights of third parties to use or disclose our confidential information. However, we may not be able to 
prevent the unauthorized disclosure or use of our technical know-how or other trade secrets by the parties to these agreements, despite the existence 
generally of confidentiality agreements and other contractual restrictions. We cannot guarantee that we have entered into such agreements with each party 
that may have or have had access to our trade secrets or proprietary processes. Monitoring unauthorized uses and disclosures is difficult and we do not 
know whether the steps we have taken to protect our proprietary know-how and trade secrets will be effective. If any of our employees, collaborators, 
CROs, manufacturers, consultants, advisors and other third parties who are parties to these agreements breaches or violates the terms of any of these 
agreements, we may not have adequate remedies for any such breach or violation. Enforcing a claim that a party illegally disclosed or misappropriated a 
trade secret is difficult, expensive, and time-consuming, and the outcome is unpredictable. As a result, we could lose our trade secrets. We also seek to 
preserve the integrity and confidentiality of our data and trade secrets by maintaining physical security of our premises and physical and electronic security 
of our information technology systems. While we have confidence in these security measures, they may still be breached, and we may not have adequate 
remedies for any breach.

In addition, our trade secrets may otherwise become known or be independently discovered by competitors. Competitors could purchase our product 

candidates, if approved, and attempt to replicate some or all of the competitive advantages we derive from our development efforts, willfully infringe, 
misappropriate or otherwise violate our intellectual property rights, design around our protected know-how and trade secrets, or develop their own 
competitive technologies that fall outside of our intellectual property rights. If any of our trade secrets were to be lawfully obtained or independently 
developed by a competitor, we would have no right to prevent them, or those to whom they communicate such trade secrets, from using that technology or 
information to compete with us. If our trade secrets are not adequately protected so as to protect our market against competitors’ products and technologies, 
our competitive position could be adversely affected.

We may be subject to claims asserting that our employees, consultants or advisors have wrongfully used or disclosed alleged trade secrets of their 
current or former employers or claims asserting ownership of what we regard as our own intellectual property.

Certain of our employees, consultants or advisors are currently, or were previously, employed at universities or other biotechnology or 
pharmaceutical companies, including our competitors or potential competitors, as well as our academic partners. Although we try to ensure that our 
employees, consultants and advisors do not use the proprietary information or know-how of others in their work for us, we may be subject to claims that 
these individuals or we have used or disclosed intellectual property, including trade secrets or other proprietary information, of any such individual’s 
current or former employer. 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. An inability to incorporate such technologies or features would have a 
material adverse effect on our business and may prevent us from successfully commercializing our product candidates. Moreover, any such litigation or the 
threat of such litigation may adversely affect our ability to hire employees or contract with independent contractors. A loss of key personnel or their work 
product could hamper or prevent our ability to commercialize our product candidates. Even if we are successful in defending against such claims, litigation 
could result in substantial costs and be a distraction to management.

In addition, while it is our policy to require our employees and contractors who may be involved in the conception or development of intellectual 

property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each party who, in 
fact, conceives or develops intellectual property that we regard as our own. Moreover, even when we obtain agreements assigning intellectual property to 
us, the assignment of intellectual property rights may not be self-executing or the assignment agreements may be breached, and we may be forced to bring 
claims against third parties, or defend claims that they may bring against us, to determine the ownership of what we regard as our intellectual property. 
Moreover, individuals executing agreements with us may have preexisting or competing 

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obligations to a third party, such as an academic institution, and thus an agreement with us may be ineffective in perfecting ownership of inventions 
developed by that individual.

Changes in U.S. patent law could diminish the value of patents in general, thereby impairing our ability to protect our product candidates.

Changes in either the patent laws or the interpretation of the patent laws in the United States could increase the uncertainties and costs surrounding 
the prosecution of patent applications and the enforcement or defense of issued patents. On September 16, 2011, the Leahy-Smith America Invents Act, or 
the Leahy-Smith Act, was signed into law. The Leahy-Smith Act includes several significant changes to U.S. patent law. Prior to March 2013 in the United 
States, assuming that other requirements for patentability are met, the first to make the claimed invention was entitled to the patent, while outside the 
United States, the first to file a patent application was entitled to the patent. After March 2013, under the Leahy-Smith Act, the United States transitioned to 
a first inventor to file system in which, assuming that other requirements for patentability are met, the first inventor to file a patent application will be 
entitled to the patent on an invention regardless of whether a third party was the first to invent the invention. The Leahy-Smith Act also includes a number 
of significant changes that affect the way patent applications will be prosecuted and may also affect patent litigation. These include allowing third-party 
submission of prior art to the USPTO during patent prosecution and additional procedures to attack the validity of a patent through various post-grant 
proceedings administered by the USPTO. The USPTO developed new regulations and procedures to govern administration of the Leahy-Smith Act, and 
many of the substantive changes to patent law associated with the Leahy-Smith Act, and in particular, the first to file provisions, only became effective on 
March 16, 2013. Accordingly, it is not clear what, if any, impact the Leahy-Smith Act will have on the operation of our business as, among other reasons, 
the USPTO must still implement various regulations. However, the Leahy-Smith 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.

The patent positions of companies engaged in the development and commercialization of biologics and pharmaceuticals are particularly uncertain. 
Two cases involving diagnostic method claims and “gene patents” have been decided by the U.S. Supreme Court. On March 20, 2012, the U.S. Supreme 
Court issued a decision in Mayo Collaborative Services v. Prometheus Laboratories, Inc., or Prometheus, a case involving patent claims directed to a 
process of measuring a metabolic product in a patient to optimize a drug dosage for the patient. According to the U.S. Supreme Court, the addition of well 
understood, routine or conventional activity such as “administering” or “determining” steps was not enough to transform an otherwise patent-ineligible 
natural phenomenon into patent-eligible subject matter. On July 3, 2012, the USPTO issued a guidance memo to patent examiners indicating that process 
claims directed to a law of nature, a natural phenomenon or a naturally occurring relation or correlation that do not include additional elements or steps that 
integrate the natural principle into the claimed invention such that the natural principle is practically applied and the patent claim amounts to significantly 
more than the natural principle itself should be rejected as directed to patent-ineligible subject matter. On June 13, 2013, the U.S. Supreme Court issued its 
decision in Association for Molecular Pathology v. Myriad Genetics, Inc., or Myriad, a case involving patent claims held by Myriad Genetics, Inc. relating 
to the breast cancer susceptibility genes BRCA1 and BRCA2. Myriad held that an isolated segment of naturally occurring DNA, such as the DNA 
constituting the BRCA1 and BRCA2 genes, is not patent-eligible subject matter, but that complementary DNA may be patent-eligible.

In 2014, the USPTO issued a guidance to its patent examiners for evaluating claims for patent subject matter eligibility under the relevant statute (35 

U.S.C. § 101). This guidance was in response to a series of decisions from the U.S. Supreme Court on patent claims reciting judicial exceptions, including 
Abstract Ideas, Laws of Nature/Natural Principles, Natural Phenomena and/or Natural Products. Based on judicial decisions and public feedback, several 
supplements to this guidance and additional memoranda and materials have since been issued and are continually being issued, while the current eligibility 
guidance has been incorporated into the latest (10th) edition of the MPEP (Manual for Patent Examination Procedure), last revised in June 2020. The 
current subject matter eligibility guideline instructs USPTO examiners to follow a two-part test, set forth in the U.S. Supreme Court decisions Alice/Mayo, 
as the only test that should be used to evaluate the eligibility of claims under examination, including claims directed to natural products and principles 
including all naturally occurring nucleic acids. Certain claims of our licensed patents and patent applications contain, and any future patents we may obtain 
may contain, claims that relate to specific recombinant DNA sequences that are naturally occurring at least in part and, therefore, could be the subject of 
future challenges made by third parties. In addition, the current USPTO subject matter eligibility guidance and the constantly evolving case law, together 
with contemplated congressional action, could all impact our ability to pursue similar patent claims in patent applications we may prosecute in the future.

We cannot assure our stockholders that our efforts to seek patent protection for our product candidates will not be negatively impacted by the 
decisions described above, rulings in other cases or changes in guidance or procedures issued by the USPTO. We cannot fully predict what impact the U.S. 
Supreme Court’s decisions in Prometheus and Myriad may have on the ability of life science companies to obtain or enforce patents relating to their 
products in the future. These decisions, 

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the guidance issued by the USPTO and rulings in other cases or changes in USPTO guidance or procedures could have a material adverse effect on our 
existing patent rights and our ability to protect and enforce our intellectual property in the future.

Moreover, although the U.S. Supreme Court has held in Myriad that isolated segments of naturally occurring DNA are not patent-eligible subject 
matter, certain third parties could allege that activities that we may undertake infringe other gene-related patent claims, and we may deem it necessary to 
defend ourselves against these claims by asserting non-infringement and/or invalidity positions, or paying to obtain a license to these claims. In any of the 
foregoing or in other situations involving third-party intellectual property rights, if we are unsuccessful in defending against claims of patent infringement, 
we could be forced to pay damages or be subjected to an injunction that would prevent us from utilizing the patented subject matter.

If we do not obtain patent term extension for patents relating to SGT-003, AVB-202-TT, AVB-401 or other future candidates, our business may be 
materially harmed.

Depending upon the timing, duration and specifics of any FDA marketing approval of SGT-003, AVB-202-TT, AVB-401 and other future 

candidates, one or more U.S. patents that we license or may own in the future may be eligible for limited patent term extension under the Drug Price 
Competition and Patent Term Restoration Act of 1984, or 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 based on the first regulatory approval for a 
particular drug or biologic. 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. However, 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. In addition, to the extent we 
wish to pursue patent term extension based on a patent that we in-license from a third party, we would need the cooperation of that third party. If we are 
unable to obtain patent term extension or the term of any such extension is less than we request, our competitors may be able to enter the market sooner.

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

We have registered trademarks with the USPTO for the marks “SOLID BIOSCIENCES”, and “SOLID BIOSCIENCES” logo and registered marks 

in foreign jurisdictions for “SOLID BIOSCIENCES”, “SOLID GT” and “SOLID BIOSCIENCES” logo. Once registered, our trademarks or trade names 
may be challenged, infringed, diluted, tarnished, 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, which we need to build name recognition among potential partners or customers in our markets of 
interest. At times, competitors may adopt trade names or trademarks similar to ours, thereby impeding our ability to build brand identity and possibly 
leading to market confusion. In addition, there could be potential trade name or trademark infringement, dilution or tarnishment claims brought by owners 
of other registered trademarks or trademarks that incorporate variations of our registered or unregistered trademarks or trade names. Over the long term, if 
we are unable to establish name recognition based on our trademarks and trade names, then we may not be able to compete effectively and our business 
may be adversely affected. Our efforts to enforce or protect our proprietary rights related to trademarks, trade secrets, domain names, copyrights or other 
intellectual property may be ineffective and could result in substantial costs and diversion of resources.

Intellectual property rights and regulatory exclusivity rights do not necessarily address all potential threats.

The degree of future protection afforded by our intellectual property rights is uncertain because intellectual property rights have limitations, and may 

not adequately protect our business or permit us to maintain our competitive advantage. For example:

•

•

others may be able to make gene therapy products that are similar to our candidates but that are not covered by the claims of the patents that we 
license or may own in the future;

we, or our current or future license partners or collaborators, might not have been the first to make the inventions covered by the issued patent 
or pending patent applications that we license or may own in the future;

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•

•

•

•

•

•

•

•

•

•

we, or our current and future license partners or collaborators, might not have been the first to file patent applications covering certain of our or 
their inventions;

others may independently develop similar or alternative products or duplicate any of our processes without infringing our owned or licensed 
intellectual property rights;

others may circumvent our regulatory exclusivities, such as by pursuing approval of a competitive product candidate via the traditional 
approval pathway based on their own clinical data, rather than relying on the abbreviated pathway provided for biosimilar applicants;

it is possible that our pending licensed patent applications or those that we may own in the future will not lead to issued patents;

issued patents that we hold rights to now or in the future may be held invalid or unenforceable, including as a result of legal challenges by our 
competitors;

others may have access to the same intellectual property rights licensed to us;

our competitors might conduct research and development activities in countries where we do not have patent rights and then use the 
information learned from such activities to develop competitive products for sale in our major commercial markets;

we may not develop additional proprietary technologies that are patentable;

the patents or other intellectual property rights of others may have an adverse effect on our business; and

we may choose not to file a patent for certain trade secrets or know how, and a third party may subsequently file a patent covering such 
intellectual property.

If approved, our product candidates that are licensed and regulated as biologics may face competition from biosimilars approved through an 
abbreviated regulatory pathway.

The Biologics Price Competition and Innovation Act of 2009, or BPCIA, was enacted as part of the Health Care Reform Law to establish an 

abbreviated pathway for the approval of biosimilar and interchangeable biological products.  The regulatory pathway establishes legal authority for the 
FDA to review and approve biosimilar biologics, including the possible designation of a biosimilar as “interchangeable” based on its similarity to an 
approved biologic. Under the BPCIA, 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 In addition, the licensure of a biosimilar product may not be made effective by the FDA until 12 years from 
the date on which the reference product was first licensed. During this 12-year period of exclusivity, another company may still develop and receive 
approval of a competing biologic, so long as its BLA does not reply on the reference product, sponsor’s data or submit the application as a biosimilar 
application.  The law is complex and is still being interpreted and implemented by the FDA.  As a result, its ultimate impact, implementation, and meaning 
are subject to uncertainty, and any new policies or processes adopted by the FDA could have a material adverse effect on the future commercial prospects 
for our biological products.

We believe that any of the product candidates we develop as a biological product under a BLA should qualify for the 12-year period of exclusivity.  

However, there is a risk that this exclusivity could be shortened due to congressional action or otherwise, or that the FDA will not consider the subject 
product candidates to be reference products for competing products, potentially creating the opportunity for biosimilar competition sooner than anticipated.  
Moreover, the extent to which a biosimilar, once approved, will be substituted for any one of the reference products in a way that is similar to traditional 
generic substitution for non-biological products will depend on a number of marketplace and regulatory factors that are still developing.  Nonetheless, the 
approval of a biosimilar to our product candidates would have a material adverse impact on our business due to increased competition and pricing pressure.

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Risks related to ownership of our common stock

If we cannot comply with Nasdaq’s continued listing standards, our common stock could be delisted, which would harm our business, the trading price 
of our common stock, our ability to raise additional capital and the liquidity of the market for our common stock.

We must satisfy Nasdaq’s continued listing requirements, including, among other things, a minimum closing bid price of $1.00 per share, or risk 

delisting, which would have a material adverse effect on our business. A delisting of our common stock from Nasdaq could materially reduce the liquidity 
of our common stock and result in a corresponding material reduction in the price of our common stock. In addition, delisting could harm our ability to 
raise capital through alternative financing sources on terms acceptable to us, or at all, and may result in the potential loss of confidence by investors, 
suppliers, customers and employees and fewer business development opportunities. Any potential delisting of our common stock from Nasdaq would also 
make it more difficult for our stockholders to sell their shares in the public market. 

As previously disclosed, on May 31, 2022, we received a deficiency letter from the Listing Qualifications Department of The Nasdaq Stock Market, 

or Nasdaq, notifying us that, for a period of 30 consecutive business days, the bid price for our common stock had closed below the $1.00 per share 
minimum bid price requirement for continued inclusion on The Nasdaq Global Select Market. On November 11, 2022, we received a letter from the Listing 
Qualifications Department of The Nasdaq Stock Market notifying us that we had regained compliance with the minimum bid price requirement as we had a 
closing bid price of at least $1.00 per share for a minimum of ten consecutive business days from October 28, 2022 through November 10, 2022.

Although the matter is now closed, there can be no assurance that we will be able to continue to comply with the Nasdaq continued listing 

requirements.

Our executive officers, directors and principal stockholders maintain the ability to control or significantly influence all matters submitted to our 
stockholders for approval.

Our executive officers and directors and principal stockholders, in the aggregate, beneficially own shares representing a significant percentage of our 

capital stock. As a result, if these stockholders were to choose to act together, they would be able to control or significantly influence all matters submitted 
to our stockholders for approval, as well as our management and affairs. For example, these persons, if they choose to act together, would control or 
significantly influence the election of directors and approval of any merger, consolidation or sale of all or substantially all of our assets. 

This concentration of voting power may:

•

•

•

delay, defer or prevent a change in control;

entrench our management and our Board of Directors; or

delay or prevent a merger, consolidation, takeover or other business combination involving us on terms that other stockholders may desire.

A significant number of our total outstanding shares may be sold into the market in the near future, which could cause the market price of our 
common stock to drop significantly, even if our business is performing well.

Sales of a substantial number of shares of our common stock in the public market could occur at any time. These sales, or the perception in the 

market that holders of a large number of shares intend to sell shares, could reduce the market price of our common stock. Our outstanding shares of 
common stock may be freely sold in the public market at any time to the extent permitted by Rules 144 and 701 under the Securities Act of 1933, as 
amended, or the Securities Act, or to the extent such shares have already been registered under the Securities Act and are held by non-affiliates of ours. 
Moreover, holders of a substantial number of shares of our common stock have rights, subject to certain conditions, to require us to file registration 
statements covering their shares or to include their shares in registration statements that we may file for ourselves or other stockholders. 

In October 2020, in connection with the execution of our collaboration and license agreement with Ultragenyx, we issued and sold 521,719 shares of 

our common stock to Ultragenyx. For the ten-year period after date of such sale, subject to specified conditions, we have agreed to file a registration 
statement in order to register all or a portion of the shares sold to Ultragenyx.

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In July 2019 and December 2020, we completed private placements of shares of our common stock and pre-funded warrants to purchase shares of 

our common stock to several accredited investors. In December 2022, we also issued shares of our common stock in the Acquisition and in a related private 
placement to several accredited investors.  We have filed registration statements covering the resale of these shares by the purchasers in these private 
placements and the stock consideration issued in the Acquisition, and have agreed to keep such registration statements effective until the date the shares 
covered by the respective registration statement have been sold or can be resold without restriction under Rule 144 of the Securities Act. 

In addition, we have filed registration statements registering all shares of common stock that we may issue under our equity compensation plans. 

These shares can be freely sold in the public market upon issuance, subject to black-out periods and volume limitations applicable to affiliates.

We currently have on file with the SEC a universal shelf registration statement which allows us to offer and sell registered common stock, preferred 

stock, debt securities, depositary shares, warrants and/or units from time to time pursuant to one or more offerings at prices and terms to be determined at 
the time of sale.

The price of our common stock has been, and in the future is likely to be, volatile and fluctuate substantially, which could result in substantial losses 
for holders of our common stock.

Our stock price has been, and in the future is likely to be, volatile. The stock market in general and the market for biopharmaceutical or 

pharmaceutical companies in particular, has experienced extreme volatility that has often been unrelated to the operating performance of particular 
companies. As a result of this volatility, our stockholders may not be 

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able to sell their shares of common stock at or above the price they paid for their shares. The market price for our common stock may be influenced by 
many factors, including:

•

•

•

•

•

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•

•

•

•

•

•

•

•

•

•

•

•

•

•

our ability to achieve the anticipated benefits of the Acquisition and to successfully implement our proposed business strategy;

results of or developments in preclinical studies and clinical trials of SGT-001, SGT-003, AVB-202-TT, AVB-401 or other future candidates or 
those of our competitors;

the success of competitive products or technologies;

the effect of the COVID-19 pandemic on both the healthcare system and the patient population;

regulatory or legal developments in the United States, the European Union and other countries;

the recruitment or departure of key personnel;

the level of expenses related to any of our product candidates, or our clinical development programs and our commercialization efforts;

the results of our efforts to discover, develop, acquire or in-license additional product candidates;

actual or anticipated changes in our development timelines;

our ability to raise additional capital;

our inability to obtain or delays in obtaining adequate product supply for any approved product or inability to do so at acceptable prices;

disputes or other developments relating to proprietary rights, including patents, litigation matters and our ability to obtain patent protection for 
our product candidates;

significant lawsuits, including patent or stockholder litigation;

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

changes in the structure of health care payment systems;

market conditions in the pharmaceutical and biotechnology sectors;

general economic, industry and market conditions; 

the liquidity for our stock and daily share volumes transacted;

our ability to maintain our listing on the Nasdaq Global Select Market; and

the other factors described in this “Risk Factors” section.

If our quarterly operating results fall below the expectations of investors or securities analysts, the price of our common stock could decline 

substantially. Furthermore, any quarterly fluctuations in our operating results may, in turn, cause the price of our stock to fluctuate substantially.

In the past, following periods of volatility in the market price of a company’s securities, securities class-action litigation often has been instituted 
against that company. We and certain of our executive officers and board members have previously been named as defendants in purported class action 
lawsuits. Any such litigation instituted against us could cause us to incur substantial costs to defend such claims and divert management’s attention and 
resources.

Our October 2022 reverse stock split may decrease the liquidity of the shares of our common stock.

The liquidity of the shares of our common stock may be affected adversely by the 1-for-15 reverse stock split we effected in October 2022 given the 
reduced number of shares that are outstanding following the reverse stock split, which may lead to reduced trading and a smaller number of market makers 
for our common stock, particularly if the price per share of our common stock is not sustained. In addition, the reverse stock split has increased the number 
of stockholders who own “odd lots” of less than 100 shares of our common stock, A purchase or sale of less than 100 shares of common stock may result in 
incrementally higher trading costs through certain brokers, particularly “full service” brokers. Therefore, those stockholders who own fewer than 100 
shares of our common stock following the reverse stock split may be required to pay higher transaction costs if they sell their common stock.

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An active trading market for our common stock may not be sustained.

Although our common stock is listed on the Nasdaq Global Select Market, given the limited trading history of our common stock, there is a risk that 
an active trading market for our shares may not continue to develop or be sustained. If an active market for our common stock does not continue to develop 
or is not sustained, it may be difficult for our stockholders to sell shares without depressing the market price for the shares, if at all. 

We are an “emerging growth company,” and a “smaller reporting company” and the reduced disclosure requirements applicable to emerging growth 
companies and smaller reporting companies may make our common stock less attractive to investors.

We are an “emerging growth company,” or EGC, as defined in the Jumpstart our Business Startups Act of 2012, or the JOBS Act. We will remain an 
EGC until the earliest of: (i) the last day of the fiscal year in which we have total annual gross revenues of $1.235 billion or more; (ii) December 31, 2023; 
(iii) the date on which we have issued more than $1.0 billion in nonconvertible debt during the previous three years; and (iv) the date on which we are 
deemed to be a large accelerated filer under the rules of the Securities and Exchange Commission, or the SEC. For so long as we remain an EGC, we are 
permitted and intend to rely on exemptions from certain disclosure requirements that are applicable to other public companies that are not emerging growth 
companies. These exemptions include:

•

•

•

•

•

not being required to comply with the auditor attestation requirements of Section 404 of the Sarbanes-Oxley Act, or Section 404;

not being required to comply 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;

being permitted to provide only two years of audited financial statements, in addition to any required unaudited interim financial statements, 
with correspondingly reduced “Management’s Discussion and Analysis of Financial Condition and Results of Operations” disclosure;

reduced disclosure obligations regarding executive compensation; and

an exemption from the requirement to seek nonbinding advisory votes on executive compensation or golden parachute arrangements.

We are also a smaller reporting company, and we will remain a smaller reporting company until the fiscal year following the determination that our 
voting and non-voting common stock held by non-affiliates is more than $250 million measured on the last business day of our second fiscal quarter, or our 
annual revenues are less than $100 million during the most recently completed fiscal year and our voting and non-voting common stock held by non-
affiliates is more than $700 million measured on the last business day of our second fiscal quarter. Similar to emerging growth companies, smaller reporting 
companies are able to provide simplified executive compensation disclosure and have certain other reduced disclosure obligations, including, among other 
things, being permitted to provide only two years of audited financial statements, with correspondingly reduced “Management’s Discussion and Analysis of 
Financial Condition and Results of Operations”; not being required to furnish a contractual obligations table in “Management's Discussion and Analysis of 
Financial Condition and Results of Operations”; and not being required to furnish a stock performance graph in our annual report.

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We may choose to take advantage of some, but not all, of the available exemptions. We have taken advantage of reduced reporting burdens in our 

filings with the Securities and Exchange Commission. In particular, we have not included all of the executive compensation information that would be 
required if we were not an EGC. We cannot predict whether investors will find our common stock less attractive if we rely on certain or all of 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 
stock price may be more volatile.

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

As a public company, and particularly after we are no longer an EGC or a smaller reporting 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. Moreover, 
these rules and regulations will increase our legal and financial compliance costs and will make some activities more time-consuming and costly. For 
example, we expect that these rules and regulations may make it more difficult and more expensive for us to obtain director and officer liability insurance. 

Pursuant to Section 404, we are required to furnish a report by our management on our internal control over financial reporting. However, while we 

remain an EGC or a smaller reporting company with less than $100 million in revenue, we will not be required to include an attestation report on internal 
control over financial reporting issued by our independent registered public accounting firm. To achieve compliance with Section 404 within the prescribed 
period, we will be 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, 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 in the financial markets due to a loss of confidence in the 
reliability of our financial statements.

Provisions in our certificate of incorporation and our bylaws and under Delaware law could make an acquisition of us, which may be beneficial to our 
stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current management.

Provisions in our certificate of incorporation and our bylaws may discourage, delay or prevent a merger, acquisition or other change in control of us 

that stockholders may consider favorable, including transactions in which our stockholders might otherwise receive a premium for their shares. These 
provisions also could limit the price that investors might be willing to pay in the future for shares of our common stock, thereby depressing the market price 
of our common stock. In addition, because our Board of Directors is responsible for appointing the members of our management team, these provisions 
may frustrate or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for stockholders to 
replace members of our Board of Directors. Among other things, these provisions:

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•

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•

establish a classified Board of Directors such that not all members of our board are elected at one time;

allow the authorized number of our directors to be changed only by resolution of our Board of Directors;

limit the manner in which stockholders can remove directors from the board;

establish advance notice requirements for stockholder proposals that can be acted on at stockholder meetings and nominations to our Board of 
Directors;

require that stockholder actions must be effected at a duly called stockholder meeting and prohibit actions by our stockholders by written 
consent;

limit who may call stockholder meetings;

authorize our Board of Directors to issue preferred stock without stockholder approval, which could be used to institute a stockholder rights 
plan, or so-called “poison pill,” that would work to dilute the stock ownership of a 

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potential hostile acquirer, effectively preventing acquisitions that have not been approved by our Board of Directors; and

•

require the approval of the holders of at least two-thirds of the votes that all our stockholders would be entitled to cast to amend or repeal 
certain provisions of our certificate of incorporation or bylaws.

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

or the DGCL, which prohibits a person who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of 
three years after the date of the transaction in which the person acquired in excess of 15% of our outstanding voting stock, unless the merger or 
combination is approved in a prescribed manner.

Because we do not anticipate paying any cash dividends on our capital stock in the foreseeable future, capital appreciation, if any, is the only sole 
source of gain for an investment in our common stock.

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

growth and development of our business. In addition, the terms of any future debt agreements may preclude us from paying dividends. As a result, capital 
appreciation, if any, of our common stock will be the sole source of gain for an investor for the foreseeable future.

Our certificate of incorporation provides that the Court of Chancery of the State of Delaware is the exclusive forum for certain litigation that may be 
initiated by our stockholders, which could limit our stockholders’ ability to obtain a favorable judicial forum for such disputes with us or our directors, 
officers or employees.

Our certificate of incorporation provides that, unless we consent in writing to the selection of an alternative forum, the Court of Chancery of the 

State of Delaware is the exclusive forum for (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim for breach of a 
fiduciary duty owed by any of our directors, officers or other employees to us or our stockholders, (iii) any action asserting a claim arising pursuant to any 
provision of the DGCL, our certificate of incorporation or our bylaws or (iv) any action asserting a claim governed by the internal affairs doctrine. We do 
not intend to have this choice of forum provision apply to, and this choice of forum provision will not apply to, actions arising under the Securities Act or 
the Exchange Act. 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 certificate of incorporation to be inapplicable or unenforceable in an 
action, we may incur additional costs associated with resolving such action in other jurisdictions.

Item 1B. Unresolved Staff Comments. 

None. 

Item 2. Properties. 

We lease our corporate headquarters, which consists of approximately 49,869 square feet of office, laboratory, research and development and 
manufacturing space in Charlestown, Massachusetts. The lease for our corporate headquarters has an initial term of approximately ten years that expires in 
2032 with an option to extend the lease for an additional five years. In addition, we lease smaller laboratory and office space. 

Item 3. Legal Proceedings. 

None.

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 has been publicly traded on the Nasdaq Global Select Market under the symbol “SLDB” since January 26, 2018 in connection 

with our initial public offering. Prior to that date, there was no established public trading market for our common stock.

The following graph compares the performance of our common stock to The Nasdaq Composite Index and to The Nasdaq Biotechnology Index 

from January 26, 2018 (the first date that shares of our common stock were publicly traded) through December 31, 2022. The comparison assumes $100 
was invested after the market closed on January 26, 2018 in our common stock and in each of the foregoing indices, and it assumes reinvestment of 
dividends, if any. The stock price performance included in this graph is not necessarily indicative of future stock price performance.

COMPARISON OF CUMULATIVE TOTAL RETURN
Among The Nasdaq Composite Index, The Nasdaq Biotechnology Index and Solid Biosciences Inc.

Holders 

As of February 16, 2023, we had approximately 49 holders of record of our common stock. This number does not include beneficial owners whose 
shares were held in street name. The actual number of holders of our common stock is greater than this number of record holders and includes stockholders 
who are beneficial owners, but whose shares are held in street name by brokers or held by other nominees. This number of holders of record also does not 
include stockholders whose shares may be held in trust by other entities. 

Purchase of Equity Securities 

We did not purchase any of our registered equity securities during the period covered by this Annual Report on Form 10-K. 

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Recent Sales of Unregistered Securities 

We did not sell any securities, during the year ended December 31, 2022 that were not registered under the Securities Act of 1933, as amended, or 

the Securities Act, and that have not otherwise been described in a Quarterly Report on Form 10-Q or in a Current Report on Form 8-K. 

Item 6. Reserved. 

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Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations. 

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our financial 
statements and related notes appearing elsewhere in this Annual Report on Form 10-K. Some of the information contained in this discussion and analysis 
or set forth elsewhere in this Annual Report on Form 10-K, including information with respect to our plans and strategy for our business, includes forward-
looking statements that involve risks and uncertainties. As a result of many factors, including those factors set forth in the “Risk Factors” section of this 
Annual Report on Form 10-K, our actual results could differ materially from the results described, in or implied, by these forward-looking statements. 

Unless otherwise indicated, all information in this Annual Report on Form 10-K gives effect to a 1-for-15 reverse stock split of our common stock 

that became effective on October 27, 2022, and all references to historical share and per share amounts give effect to the reverse stock split.

 Overview 

We are a life science company focused on advancing a portfolio of neuromuscular and cardiac programs, including SGT-003, a differentiated gene 

therapy candidate, for the treatment of Duchenne muscular dystrophy, or Duchenne; AVB-202-TT, a gene therapy program for the treatment of Friedreich’s 
ataxia, or FA; AVB-401, a gene therapy program for the treatment of BAG3-mediated dilated cardiomyopathy; and additional assets for the treatment of 
undisclosed cardiac diseases. We aim to be a center of excellence, bringing together those with expertise in science, technology, disease management and 
care. Patient-focused and founded by those directly impacted by Duchenne, our mandate is to improve the daily lives of patients living with these 
devastating diseases.

Solid was purpose-built to advance the best science and accelerate the discovery and development of treatments that may benefit all patients with 

Duchenne. As Solid expands to bring meaningful treatments to patients living with other neuromuscular and cardiac diseases, the values and guiding 
principles that drive us continue. Our corporate vision is to build an innovation platform enabling the discovery and development of high-value genetic 
medicines for neuromuscular and cardiac diseases by integrating internal capabilities, including a vector core, use of validated animal models, optimized 
expression cassettes, novel capsids and regulatory elements, and collaborations with leaders in related clinical and research fields. Our mission, which 
guides our operations, is to treat and change the course of neuromuscular and cardiac diseases at all stages. Underscoring this mission, our disease-focused 
business model is founded on the following fundamental principles:

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•

•

identify and develop meaningful therapies for patients with neuromuscular and cardiac diseases; 

bring together the leading experts in neuromuscular and cardiac diseases, science, technology, disease management and care; and 

be guided by the needs of these patients. 

Reverse Stock Split

On October 26, 2022, our board of directors approved a reverse stock split of our outstanding shares of common stock at a ratio of one-for-15 (1:15). 

The reverse stock split became effective on October 27, 2022. The reverse stock split was approved by our stockholders at our Annual Meeting of 
Stockholders on June 7, 2022. All share and per share amounts of the common stock included in this Annual Report on Form 10-K, including in the 
accompanying consolidated financial statements, have been retrospectively adjusted to give effect to the reverse stock split for all periods presented, 
including reclassifying an amount equal to the reduction in par value to additional paid-in capital.

Acquisition and Private Placement 

On December 2, 2022, we completed our acquisition of AavantiBio, Inc., or AavantiBio, a privately held gene therapy company focused on 

transforming the lives of patients with Friedreich’s ataxia, or FA, and rare cardiomyopathies, or the Acquisition. Upon the consummation of the 
Acquisition, we acquired AavantiBio’s gene therapy programs, AVB-202-TT and AVB-401, additional assets for the treatment of undisclosed cardiac 
diseases, platform technologies and know-how related thereto.

On December 2, 2022, we issued and sold 10,638,290 shares of our common stock at a price per share of $7.05 in a private placement, or the 
December 2022 Private Placement, which closed immediately following the Acquisition.  We received $72.6 million of net proceeds from the December 
2022 Private Placement after deducting offering costs.

92

 
 
 
 
Our Operations

We are focused on developing transformative treatments to improve the lives of patients with rare neuromuscular and cardiac diseases. Our current 

programs are all designed for treating these diseases with gene transfer products. Gene transfer, a type of gene therapy, is designed to address diseases 
caused by mutated genes through the delivery of functional versions of those genes, called transgenes. The transgenes are then utilized by the body to 
produce proteins that are absent or not functional prior to treatment, potentially offering long-lasting clinical benefit. In addition to a transgene, our gene 
transfer candidates include a viral capsid (a protein shell utilized as a vehicle to deliver a transgene to cells in the body) and a promoter (a specialized DNA 
sequence that directs cells to produce the protein in specific tissues). The vector is modified to no longer self-replicate yet still retain its ability to introduce 
new genetic material directly into patients’ cells. Adeno-associated virus, or AAV, vectors have been approved for use to deliver transgenes to patients, 
including via systemic delivery. The use of AAV vectors to deliver gene therapies has also been extensively studied by third parties in human clinical trials 
for multiple disease indications, and in certain of these trials AAV was delivered systemically to the patient.

Due to our significant research and development expenditure, licensing and patent investment, and general administrative costs associated with our 

operations, we have generated substantial operating losses in each period since our inception. Our net losses were $86.0 million, $72.2 million and $88.3 
million for the years ended December 31, 2022, 2021 and 2020, respectively. As of December 31, 2022, we had an accumulated deficit of $562.7 million. 
We expect to incur significant expenses and operating losses for the foreseeable future. 

As we seek to develop and commercialize SGT-003, AVB-202-TT, AVB-401 or other future candidates, we anticipate that our expenses will 
increase significantly and that we will need substantial additional funding to support our continuing operations. Until such time as we can generate 
significant revenue from product sales, if ever, we expect to finance our operations through a combination of public or private equity financings, debt 
financings or other sources, which may include licensing agreements or strategic collaborations. We may be unable to raise additional funds or enter into 
such agreements or arrangements when needed on favorable terms, if at all. If we fail to raise capital or enter into such agreements as and when needed, we 
may have to significantly delay, scale back or discontinue the development or commercialization of SGT-003, AVB-202-TT, AVB-401 or other future 
candidates. 

Because of the numerous risks and uncertainties associated with product development, we are unable to predict the timing or amount of increased 
expenses or determine when or if we will be able to achieve or maintain profitability. Even if we are able to generate revenue from product sales, we may 
not become profitable. If we fail to become profitable or are unable to sustain profitability on a continuing basis, then we may be unable to continue our 
operations at planned levels and be forced to reduce or terminate our operations. 

As of December 31, 2022, we had cash, cash equivalents, and available-for-sale securities of $213.7 million, excluding restricted cash of $1.8 
million. We believe that our cash, cash equivalents, and available-for-sale securities as of December 31, 2022 will enable us to fund our operating expenses 
and capital expenditure requirements into 2025. We have based this estimate on assumptions that may prove to be wrong, and we could use our available 
capital resources sooner than we currently anticipate.

The COVID-19 pandemic has caused federal, state, and local governments to implement measures to slow the spread of the outbreak through 
quarantines, strict travel restriction and bans, heightened border scrutiny and other measures. The full extent of the impact of COVID-19 on our business, 
results of operations and financial condition will depend on future developments that are highly uncertain, including the actions taken to contain it or treat 
its impact and the impact on our preclinical development, employees, vendors and suppliers, all of which are uncertain and cannot be predicted. We will 
continue to monitor the situation closely.

93

 
Financial operations overview 

Revenue 

Collaboration revenue

Collaboration revenue was $8.1 million for the year ended December 31, 2022. Collaboration revenue was $13.6 million for the year ended 
December 31, 2021. We recognized this revenue related to research services and cost reimbursement from the collaboration and license agreement, or the 
Collaboration Agreement, with Ultragenyx Pharmaceutical Inc., or Ultragenyx. No other research and development has commenced under this agreement.

Product revenue

We have not generated any product revenue to date and do not expect to generate any product revenue from the sale of our products for the 
foreseeable future, if ever. If our development efforts for SGT-003, AVB-202-TT, AVB-401 or other future candidates are successful and result in 
marketing approval, we may generate product revenue in the future from product sales. 

Operating expenses 

We classify our operating expenses into two categories: research and development, and general and administrative expenses. Personnel costs, 

including salaries, benefits, bonuses and equity-based compensation expense, comprise a significant component of each of these expense categories. We 
allocate expenses associated with personnel costs based on the nature of work associated with these resources. 

Research and development expenses 

Research and development expenses consist primarily of costs incurred for our research activities, including our discovery efforts, and the 
development of SGT-001, our first-generation Duchenne microdystrophin gene transfer candidate that we are no longer developing, SGT-003, AVB-202-
TT, AVB-401 and our other future candidates and include: 

•

•

•

•

•

•

•

expenses incurred under agreements with third parties, including contract research organizations, or CROs, that conduct research and 
preclinical activities on our behalf, as well as contract manufacturing organizations, or CMOs, that manufacture SGT-001, SGT-003, AVB-202-
TT, AVB-401 and other future candidates for use in our preclinical studies and clinical trials; 

salaries, benefits and other related costs, including equity-based compensation expense, for personnel engaged in research and development 
functions;

costs of outside consultants, engaged to assist in our research and development activities, including their fees, equity-based compensation and 
related travel expenses;

costs of laboratory supplies and acquiring, developing and manufacturing preclinical study and clinical trial materials;

costs incurred in seeking regulatory approval of SGT-001, SGT-003, AVB-202-TT, AVB-401 and our other future candidates; 

expenses incurred under our intellectual property licenses; and 

facility-related research and development expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of 
facilities and other operating costs. 

Research and development activities are central to our business model. We are still in the early stages of development of our candidates. For 
example, we expect to file an IND for SGT-003 in the second half of 2023 to allow us to initiate clinical development. Product candidates in later stages of 
clinical development generally have higher development costs than those in preclinical development or in earlier stages of clinical development, primarily 
due to the increased size and duration of later-stage clinical trials. We expect that our research and development expenses will continue to increase for the 
foreseeable future if and as we initiate clinical trials for SGT-003, AVB-202-TT, AVB-401 or any other future candidates and continue to identify and 
develop additional candidates.

We typically use our employee and infrastructure resources across our product candidates. We track outsourced development costs and milestone 

payments made under our licensing arrangements by product candidates, but we do not allocate personnel costs, license payments made under our licensing 
arrangements or other internal costs to product 

94

 
 
candidates on a program-specific basis. These costs are included in unallocated research and development expenses in the table below. 

The following table summarizes our research and development expenses by product candidates for the respective periods: 

(in thousands)
SGT-001
SGT-003
Other development programs
Unallocated research and development expenses

Personnel related expenses
External expenses

Total unallocated research and development expenses

Total research and development expenses

For the Year Ended December 31,

2022

2021

24,844     $
9,995    
3,450    

24,883    
15,248    
40,131    
78,420     $

22,826  
276  
672  

24,515  
10,450  
34,965  
58,739  

  $

  $

We cannot determine with certainty the duration, costs and timing of clinical trials of SGT-003, AVB-202-TT, AVB-401 and other future candidates, 
or if, when or to what extent we will generate revenue from the commercialization and sale of any of our product candidates for which we obtain marketing 
approval or our other research and development expenses. We may never succeed in obtaining marketing approval for any of our product candidates. The 
duration, costs and timing of clinical trials and development of our candidates will depend on a variety of factors, including: 

•

•

•

•

•

•

•

the scope, rate of progress, expense and results of any clinical trials of SGT-003, AVB-202-TT, AVB-401 and other future candidates and other 
research and development activities that we may conduct; 

the imposition of regulatory restrictions on clinical trials, including full and partial clinical holds and the time and activities required to lift any 
such holds; 

uncertainties in clinical trial design and patient enrollment or drop out or discontinuation rates; 

significant and changing government regulation and regulatory guidance; 

potential additional studies or clinical trials requested by regulatory agencies; 

the timing and receipt of any marketing approvals; and 

the expense of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights. 

General and administrative expenses 

General and administrative expenses consist primarily of salaries and other related costs, including equity-based compensation, for personnel in our 

executive, finance, business development and administrative functions. General and administrative expenses also include legal fees relating to patent and 
corporate matters, professional fees for accounting, auditing, tax and consulting services, insurance costs, travel expenses, acquisition costs, and facility-
related expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of office facilities and other operating costs. 

We expect that our general and administrative expenses will increase in the future as we support our research and development activities and 

activities related to any planned or future clinical trials for and potential commercialization of SGT-003, AVB-202-TT, AVB-401 and other future 
candidates.

Restructuring charges

In April 2022, we implemented changes to our corporate strategy. In connection with the changes to corporate operations, we reduced headcount by 

approximately 35 percent.

In November 2022, we approved a plan designed to streamline our operating structure in connection with the Acquisition. In connection with the 

plan, we reduced headcount by approximately 18 percent in December 2022.

95

 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
     
   
 
 
 
 
 
 
 
 
 
 
 
 
Other income (expense), net 

Other income (expense), net consists of interest income earned on our cash, cash equivalents, available-for-sale securities, amortization of 

investment premium or accretion of investment discount, and the gain related to the Acquisition, net of financing leases interest expense.

Income taxes 

We account for income taxes using an asset and liability approach, which requires recognition of deferred tax assets and liabilities for the expected 

future tax consequences of events that have been recognized in the consolidated financial statements but have not been reflected in taxable income. A 
valuation allowance is established to reduce deferred tax assets to their estimated realizable value. 

We account for uncertainty in income taxes recognized in the financial statements by applying a two-step process to determine the amount of tax 
benefit to be recognized. First, the tax position must be evaluated to determine the likelihood that it will be sustained upon external examination by the 
taxing authorities. If the tax position is deemed more-likely-than-not to be sustained, the tax position is then assessed to determine the amount of benefit to 
recognize in the financial statements. The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of 
being realized upon ultimate settlement. The provision for income taxes includes the effects of any resulting tax reserves, or unrecognized tax benefits, that 
are considered appropriate as well as the related net interest and penalties. 

Critical accounting policies and use of estimates 

Our management’s discussion and analysis of financial condition and results of operations is based on our consolidated financial statements, which 

have been prepared in accordance with generally accepted accounting principles in the United States. The preparation of our consolidated financial 
statements and related disclosures requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, costs 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 are reasonable under the circumstances, the results of which form the basis for making 
judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. We evaluate our estimates and assumptions on 
an ongoing basis. Our actual results may differ from these estimates. 

While our significant accounting policies are described in more detail in the notes to our consolidated financial statements appearing at the end of 

this Annual Report on Form 10-K, we believe that the following accounting policies are those most critical to the judgments and estimates used in the 
preparation of our consolidated financial statements and that involve a significant level of estimation uncertainty.

Revenue Recognition

As discussed in Note 2 to our consolidated audited financial statements, under Accounting Standards Codification, or ASC, 606, Revenue from 
Contracts with Customers, 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, 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 the entity will collect consideration it is entitled to in exchange for the goods or services it transfers to 
the customer.

96

 
When optional goods or services are offered, we assess the options to determine whether the options grant the customer a material right. This 
determination includes whether the option is priced at an amount that the customer would not have received without entering into the contract. If we 
conclude the option conveys a material right, it is accounted for as a separate performance obligation. In identifying performance obligations in a contract, 
we identify those promises that are distinct. Promised goods or services are considered distinct when the customer can benefit from the goods or services 
on their own, or together with readily available resources, and the goods or services are separately identifiable from other promises in the contract. If a 
promise is not distinct, it is combined with other promises in the contract until the combined group of promises is capable of being distinct.

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. If it is probable that a significant 
revenue reversal would not occur, the variable consideration is included in the transaction price. For contracts that include sales-based royalties for licensed 
compounds, we recognize revenue at the date when the related sales occur. Finally, we determine whether the contract contains a significant financing 
component by analyzing the promised consideration relative to the standalone selling price of the promised goods and services and the timing of payment 
relative to the transfer of the promised goods and services. At each reporting date, we reassess the transaction price and probability of achievement of the 
performance obligations and the associated constraints on transaction price. If necessary, we adjust the transaction price, recording a cumulative catch-up 
based on progress for the amount that was previously constrained.

Revenue is recognized when (or as) control of a performance obligation is transferred to the customer. When combined performance obligations 

contain a promised license and related services or other promises, management judgment is required to determine the appropriate timing of revenue 
recognition. In doing so, we must identify the predominant promise or promises in the contract to determine whether revenue is recognized at a point in 
time or over time. If over time, we must determine the appropriate measure of progress. If a license is deemed to be the predominant promise in a 
performance obligation, we must determine the nature of the license, whether functional or symbolic intellectual property, to conclude whether point-in-
time or over-time revenue recognition is most appropriate. The determination of functional or symbolic intellectual property requires an assessment of 
whether the customer is able to exploit and benefit from the license in its current condition, or if the utility of the license is dependent on or influenced by 
our ongoing activities or being associated with us.

At each reporting date, we calculate the measure of progress for the performance obligations transferred over time. The calculation generally uses an 

input measure based on costs incurred to-date relative to estimated total costs to complete the transfer of the performance obligation. The measurement of 
progress is then used to calculate the total revenue earned, including any cumulative catch-up adjustment. A 10% increase or decrease in the transaction 
price impacts net revenues from collaborators by a corresponding increase or decrease of approximately $0.8 million. A 10% increase or decrease in the 
total forecasted costs to be incurred over the period the transfer of goods or services occurs impacts net revenues from collaborators by a corresponding 
decrease or increase of approximately $0 million as the contract is complete as of December 31, 2022.

Accrued research and development expenses 

As part of the process of preparing our consolidated financial statements, we are required to estimate our accrued research and development 

expenses. This process involves reviewing open contracts and purchase orders, communicating with our personnel to identify services that have been 
performed on our behalf and estimating the level of service performed and the associated costs incurred for the services when we have not yet been 
invoiced or otherwise notified of the actual costs. The majority of our service providers invoice us in arrears for services performed, on a pre-determined 
schedule or when contractual milestones are met; however, some require advanced payments. We make estimates of our accrued expenses as of each 
balance sheet date in our consolidated financial statements based on facts and circumstances known to us at that time. Examples of estimated accrued 
research and development expenses include fees paid to: 

•

•

CROs in connection with performing research activities on our behalf and conducting clinical trials and preclinical studies on our behalf; 

vendors in connection with preclinical development activities; 

97

 
•

•

vendors related to product manufacturing and development and distribution of clinical and preclinical supplies; and 

third parties under our intellectual property licenses. 

We base our expenses related to preclinical studies and clinical trials on our estimates of the services received and efforts expended pursuant to 

quotes and contracts with multiple CROs that conduct and manage preclinical studies and clinical trials 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 expense. In accruing 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 amount of prepaid expense accordingly. Although we do not expect our estimates to be materially 
different from amounts actually incurred, our understanding of the status and timing of services performed relative to the actual status and timing of 
services performed may vary and could result in us reporting amounts that are too high or too low in any particular period.

Equity-based compensation 

In connection with the completion of our initial public offering, we adopted the 2018 Omnibus Incentive Plan, or the 2018 Plan, which provides 
for the issuance of share-based awards, including options to purchase common stock. The 2018 Plan provides for the awarding of up to 333,400 shares of 
common stock for equity awards.  On June 16, 2020, our stockholders approved the 2020 Equity Incentive Plan, or the 2020 Plan, which consists of (i) 
200,000 shares of common stock and (ii) additional shares of common stock (up to 325,268) as is equal to (i) the number of shares reserved under the 2018 
Plan that remained available for grant under the 2018 Plan as of immediately prior to the date the 2020 Plan was approved by our stockholders and (ii) the 
number of shares subject to awards granted under the 2018 Plan which awards expire, terminate or are otherwise surrendered, cancelled, forfeited or 
repurchased by us at their original issuance price pursuant to a contractual repurchase right. On June 16, 2021, our stockholders approved an amendment to 
the 2020 Plan to reserve an additional 466,666 shares of common stock for issuance under the plan. On December 1, 2022, our stockholders approved an 
amendment and restatement of the 2020 Plan, or the Amended and Restated 2020 Plan, to (i) increase the number of shares of common stock reserved for 
issuance under the plan by 866,666 shares to 1,533,333 shares, subject to adjustment in the event of stock splits and other similar events, (ii) provide for an 
annual increase, to be added on the first day of each fiscal year during the term of the plan, beginning with the fiscal year ending December 31, 2023, of 
5% of the number of shares of common stock outstanding on the first day of such fiscal year or a lesser number of shares determined by our board of 
directors, (iii) provide that up to 1,858,601 shares of common stock may be granted as “incentive stock options” under the Amended and Restated 2020 
Plan, (iv) extend the term of the plan to December 1, 2032 and (v) revise certain provisions of the plan relating to the board’s ability to delegate authority to 
make awards under the plan. Under the 2020 Plan, stock options may not be granted at less than fair value on the date of grant. At December 31, 2022, 
1,049,472 shares remained available for future issuance under the 2020 Plan.

In June 2021, our stockholders also approved the 2021 Employee Stock Purchase Plan, or the ESPP, which provides for 73,525 shares to be 
available for purchase by eligible employees according to its terms. At December 31, 2022, 41,417 shares remained available for future issuance under the 
ESPP.

We measure all stock options and other stock-based awards granted to employees, directors and non-employees based on the fair value on the date 
of the grant and recognize compensation expense of those awards, over the requisite service period, which is generally the vesting period of the respective 
award. Forfeitures are accounted for as they occur. We apply the straight-line method of expense recognition to all awards with only service-based vesting 
conditions. We have not issued any awards with performance-based vesting conditions. For stock-based awards granted to non-employees, compensation 
expense is recognized over the period during which services are rendered by such non-employees until completed.

98

 
The fair value of each stock option grant is estimated on the date of grant using the Black-Scholes option-pricing model. We historically have been a 
private company and lack company-specific historical and implied volatility information. Therefore, we estimate our expected stock volatility based on the 
historical volatility of a publicly traded set of peer companies and expect to continue to do so until such time as we have adequate historical data regarding 
the volatility of our own traded stock price. For options with service-based vesting conditions, the expected term of our stock options has been determined 
utilizing the “simplified” method for awards that qualify as “plain-vanilla” options. Through December 31, 2018, the expected term of stock options 
granted to non-employees is equal to the contractual term of the option award and effective January 1, 2019, the “simplified” method is used. The risk-free 
interest rate is determined by reference to the U.S. Treasury yield curve in effect at the time of grant of the award for time periods approximately equal to 
the expected term of the award. Expected dividend yield is based on the fact that we have never paid cash dividends and do not expect to pay any cash 
dividends in the foreseeable future, if ever. 

Results of operations 

Comparison of the years ended December 31, 2022 and 2021

The following table summarizes our results of operations for the years ended December 31, 2022 and 2021: 

(in thousands)
Revenue
Operating expenses:

Research and development
General and administrative
Restructuring expense

Total operating expenses

Loss from operations
Other income, net:

Interest income, net
Gain on acquisition
Other (loss) income, net

Total other income, net

Net loss

  For the Year Ended December 31,

Increase

    %

2022

2021

    (decrease)     Change

 $

8,094    $

13,620    $

(5,526 )   

(41 )%

78,420     
28,948     
7,178     
114,546     
(106,452 )   

2,616     
18,236     
(381 )   
20,471     
(85,981 )  $

58,739     
27,135     
-     
85,874     
(72,254 )   

64     
—     
2     
66     
(72,188 )  $

19,681     
1,813     
7,178     
28,672     
(34,198 )   

2,552     
18,236     
(383 )   
20,405     
(13,793 )   

34 %
7 %
100 %
33 %
47 %

3,988 %
100 %
(19150 )%
30,917 %
(19 )%

 $

Collaboration revenue

Collaboration revenue for the year ended December 31, 2022 was $8.1 million, compared to $13.6 million of collaboration revenue for the year 

ended December 31, 2021. The decrease in collaboration revenue of $5.5 million was related to the completion of research and development services 
contemplated under the Collaboration Agreement during the second quarter of fiscal year 2022, resulting in the recognition of the remaining deferred 
revenue, which was recorded at the time the Collaboration Agreement was executed. No other research and development has commenced under this 
agreement.

99

 
 
 
   
 
 
 
   
 
  
    
    
    
 
 
     
     
     
   
  
  
  
  
  
 
     
     
     
   
  
  
  
  
 
 
 
  
Research and development expenses 

(in thousands)
SGT-001
SGT-003
Other development programs
Unallocated research and
   development expenses

Personnel related expenses
External expenses

Total unallocated research and
   development expenses

Total research and development
   expenses

  For the Year Ended December 31,    

2022

2021

Increase

%

(decrease)

    Change

  $

24,844     $
9,995      
3,450      

22,826     $
276      
672      

2,018      
9,719      
2,778      

9 %
3,521 %
413 %

24,883      
15,248      

24,515      
10,450      

368      
4,798      

40,131      

34,965      

5,166      

  $

78,420     $

58,739     $

19,681      

2 %
46 %

15 %

34 %

Research and development expenses for the year ended December 31, 2022 were $78.4 million, compared to $58.7 million for the year ended 

December 31, 2021. The increase of $19.7 million in research and development expenses was due to an increase in SGT-003 manufacturing cost of $9.7 
million, primarily due to increase in program initiatives, and an increase in SGT-001 manufacturing cost of $2.0 million, primarily due to the change in the 
manufacturing process, an increase of other development programs costs of $2.8 million, and an increase in unallocated expenses of $5.2 million  primarily 
driven by facilities cost, including the relocation of our corporate headquarters and the purchase of lab supplies.

General and administrative expenses 

General and administrative expenses were $28.9 million for the year ended December 31, 2022, compared to $27.1 million for the year ended 

December 31, 2021. The increase of $1.8 million was due to an increase in legal expenses of $2.2 million primarily incurred in connection with the 
Acquisition offset by other non-recurring legal costs, an increase of $0.4 million related the relocation of our corporate headquarters, partially offset by a 
decrease in consulting and recruiting costs of $0.8 million. 

Restructuring charges

During the year ended December 31, 2022, we recorded charges of $7.2 million related to restructuring compared to no restructuring charges for the 

year ended December 31, 2021. The restructuring charges related to severance and other employee-related costs in connection with the restructurings that 
occurred in April 2022 and December 2022. We paid approximately $3.3 million during the year ended December 31, 2022 and $0.1 million during the 
year ended December 31, 2021.

Other income, net 

Other income, net was $20.5 million and $0.1 million for the years ended December 31, 2022 and 2021, respectively. The increase in other income 

was primarily related to the gain recorded in connection with the Acquisition of $18.2 million during the year ended December 31, 2022. 

Results of Operations—Years Ended December 31, 2021 and 2020

Discussion and analysis of the year ended December 31, 2021 compared to the year ended December 31, 2020 is included in Part II, Item 7, 
“Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended 
December 31, 2021 as filed with the SEC on March 14, 2022 (the “2021 Form 10-K”).

100

 
 
 
 
   
 
 
 
   
   
 
 
 
   
 
   
 
   
 
 
   
   
 
     
     
     
   
   
   
   
 
 
 
Liquidity and capital resources 

Sources of liquidity 

To date, we have financed our operations primarily through the sale of redeemable preferred units and member units, the sale of common stock and 
prefunded warrants to purchase shares of our common stock in private placements and the sale of common stock in our initial public offering and a follow-
on public offering, and sales of common stock under our “at-the-market offering” sales agreement, dated March 13, 2019 and as amended on August 16, 
2021, by and between us and Jefferies LLC, or Jefferies, or the ATM Sales Agreement. Through December 31, 2022, we raised an aggregate of $144.6 
million of gross proceeds from our sales of preferred units prior to the completion of our initial public offering, and an aggregate of $543.9 million of net 
proceeds from the sale of our common stock through public offerings, including our IPO, private placements, the ATM Sales Agreement, and pursuant to 
the stock purchase agreement with Ultragenyx, as detailed in the following paragraphs.

On March 13, 2019, we entered into the ATM Sales Agreement, which was amended in August 2021, under which we may offer and sell, from time 
to time, shares of our common stock having aggregate gross proceeds of up to $75.0 million through Jefferies as sales agent. Any such sales being made by 
any method that is deemed an “at-the-market offering” as defined in Rule 415 promulgated under the Securities Act. We will pay Jefferies a commission of 
up to 3% of the gross proceeds of any sales of common stock pursuant to the ATM Sales Agreement. During the year ended December 31, 2021 and 2022, 
we did not sell any shares pursuant to the ATM Sales Agreement.

On March 23, 2021, we issued and sold in a public offering 1,666,666 shares of our common stock at a price per share of $86.25, including the full 

exercise by the underwriters of an option to purchase additional shares of common stock, or the March 2021 Offering. We received net proceeds of 
approximately $134.9 million after deducting underwriting discounts and commissions and offering expenses.  

On December 2, 2022, we issued and sold 10,638,290 shares of our common stock at a price per share of $7.05 in a private placement, or the 

December 2022 Private Placement, which closed immediately following the Acquisition. We received $72.6 million of net proceeds from the December 
2022 Private Placement after deducting offering costs.

As of December 31, 2022, we had cash, cash equivalents and available-for-sale securities of $213.7 million, excluding restricted cash of $1.8 

million, and had no debt outstanding.

Cash flows 

The following table summarizes our sources and uses of cash for each of the periods presented: 

(in thousands)
Cash used in operating activities
Cash provided by (used in) investing activities
Cash provided by financing activities

Net increase (decrease) in cash and cash equivalents

101

  For the Year Ended December 31,

2022

2021

  $

  $

(97,977 )   $
59,157    
74,831    
36,011     $

(77,764 )
(91,086 )
134,985  
(33,865 )

 
 
 
 
 
 
   
 
 
     
   
 
 
 
 
 
 
 
Operating activities 

During the year ended December 31, 2022, operating activities used $98.0 million of cash, primarily resulting from our net loss of $86.0 million and 

non-cash charges of $8.3 million due primarily to the gain on acquisition of $18.2 million, offset by equity-based compensation of $7.5 million and 
depreciation expense of $2.4 million. Net cash used by changes in our operating assets and liabilities was $3.7 million which included a decrease in 
deferred revenue of $8.1 million, a decrease in accounts receivable of $0.1 million as a result of the Ultragenyx Collaboration Agreement, and a decrease in 
accounts payable of $5.2 million due to the timing of payments, partially offset by an increase in prepaid and other non-current assets of $3.7 million and a 
decrease in accrued other liabilities and non-current liabilities of $5.8 million. 

During the year ended December 31, 2021, operating activities used $77.8 million of cash, primarily resulting from our net loss of $72.2 million 
offset by non-cash charges of $17.5 million due primarily to equity-based compensation of $13.4 million and depreciation expense of $3.0 million and 
marketable securities of $1.1 million. Net cash used by changes in our operating assets and liabilities was $23.1 million which included a decrease in 
deferred revenue of $12.6 million and an increase in accounts receivable of $0.1 million as a result of the Ultragenyx Collaboration Agreement, a decrease 
in prepaid and other non-current assets of $9.3 million and a decrease in accrued other liabilities and non-current liabilities of $2.3 million partially offset 
by an increase in accounts payable of $1.2 million due to the timing of payments.

Investing activities 

During the year ended December 31, 2022, investing activities provided cash of $59.2 million, consisting primarily of the sale of available-for-sale 

securities of $212.8 million, net cash received upon the closing of the Acquisition of $31.5 million, and cash proceeds from the sale of property and 
equipment of $0.6 million, partially offset by net purchases of available-for-sale securities of $182.8 million and the purchase of property and equipment of 
$3.0 million primarily related to our new corporate headquarters lease.

During the year ended December 31, 2021, investing activities used $91.1 million of cash, consisting primarily of net purchases of available-for-sale 

securities of $141.2 million and the purchase of property and equipment of $1.3 million partially offset by the sale of available-for-sale securities of $51.4 
million.

Financing activities 

During the year ended December 31, 2022, net cash provided by financing activities was $74.8 million as a result of the December 2022 Private 

Placement.  

During the year ended December 31, 2021, net cash provided by financing activities was $135.0 million as a result of the March 2021 Offering.

A discussion of changes in our cash flow from the year ended December 31, 2020 to the year ended December 31, 2021 can be found in Part II, Item 

7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of the 2021 Form 10-K.

102

 
 
Funding requirements 

We expect our expenses to increase substantially in connection with our ongoing development activities related to SGT-003, AVB-202-TT, AVB-401 

and other future candidates. In addition, we have incurred and expect to continue to incur costs associated with operating as a public company. We expect 
that our expenses will increase substantially if and as we: 

•

•

•

•

•

•

•

•

•

•

•

•

•

move SGT-003, AVB-202-TT, AVB-401 or other future candidates into clinical trials; 

continue research and preclinical development of SGT-003, AVB-202-TT, AVB-401 or other future candidates; 

seek to identify additional product candidates; 

seek marketing approvals for our product candidates that successfully complete clinical trials, if any; 

establish a sales, marketing and distribution infrastructure to commercialize any products for which we may obtain marketing approval; 

arrange for manufacture of larger quantities of our product candidates for clinical development and potential commercialization; 

maintain, expand, protect and enforce our intellectual property portfolio; 

hire and retain additional clinical, quality control and scientific personnel;

integrate employees of AavantiBio;

build out new facilities or expand existing facilities to support our activities; 

acquire or in-license other drugs, drug candidates, technologies and intellectual property; 

fund a portion of the development or commercialization of products in collaboration with Ultragenyx pursuant to the Collaboration Agreement; 
and 

add operational, financial and management information systems and personnel.

As of December 31, 2022, we had cash, cash equivalents and available-for-sale securities of $213.7 million, excluding restricted cash of $1.8 
million. Based on our current operating plan, we believe that our cash, cash equivalents and available-for-sale securities as of December 31, 2022 will be 
sufficient to fund our operating expenses and capital requirements into 2025. As a result, in order to continue to operate our business beyond that time, we 
will need to raise additional funds. However, there can be no assurance that we will be able to generate funds on terms acceptable to us, on a timely basis, 
or at all. In addition, we have based this estimate on assumptions that may prove to be wrong, and we could use our available capital resources sooner than 
we currently anticipate.

Because of the numerous risks and uncertainties associated with the development of SGT-003, AVB-202-TT, AVB-401 and other future candidates 

and programs and because the extent to which we may enter collaborations with third parties for development of our product candidates is unknown, we are 
unable to estimate the timing and amounts of increased capital 

103

 
outlays and operating expenses associated with completing the research and development of our product candidates. Our future capital requirements will 
depend on many factors, including: 

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the progress, costs and results of integrating AavantiBio operations into our business; 

the results of future clinical trials of SGT-003, AVB-202-TT, AVB-401 and other future candidates;

the costs, timing and outcome of regulatory review of SGT-003, AVB-202-TT, AVB-401 and other future candidates; 

the scope, progress, results and costs of discovery, laboratory testing, manufacturing, preclinical development and clinical trials for SGT-003, 
AVB-202-TT, AVB-401 and other future candidates that we may pursue in the future, if any; 

the costs associated with our manufacturing process development and evaluation of third-party manufacturers;

the revenue, if any, received from commercial sale of SGT-003, AVB-202-TT, AVB-401 or other future candidates, should any of our future 
candidates receive marketing approval; 

the costs of preparing, filing and prosecuting patent applications, maintaining, defending and enforcing our intellectual property rights and 
defending intellectual property-related claims; 

the outcome of any lawsuits filed against us; 

the terms of our current and any future license agreements and collaborations; 

the success of our collaboration with Ultragenyx;

our ability to establish and maintain additional strategic collaborations, licensing or other arrangements and the financial terms of such 
arrangements;

the payment or receipt of milestones, royalties and other collaboration-based revenues, if any;

the extent to which we acquire or in-license other candidates, technologies and intellectual property; and 

if and as we need to adapt our business in response to the COVID-19 pandemic or other pandemics and collateral consequences related thereto.

We expect to supply future clinical development programs for SGT-003 with drug produced at a cGMP compliant facility located at one of our 

CMOs. We intend to establish the capability and capacity to supply SGT-003 and other future product candidates at commercial scale from multiple 
sources.

Developing pharmaceutical products, including 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 for any product 
candidates or generate revenue from the sale of any products for which we may obtain marketing approval. In addition, our product candidates, if approved, 
may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of products that we do not expect to be commercially 
available for many years, if ever. Accordingly, we will need to obtain substantial additional funds to achieve our business objectives. 

Adequate additional funds may not be available to us on acceptable terms, or at all. We do not currently have any committed external source of 

funds. To the extent that we raise additional capital through the sale of equity securities, our existing stockholders’ ownership interest may be diluted. Any 
debt or preferred equity financing, if available, may involve agreements that include restrictive covenants that may limit our ability to take specific actions, 
such as incurring additional debt, making capital expenditures or declaring dividends, which could adversely impact our ability to conduct our business, 
and may require the issuance of warrants, which could potentially dilute existing stockholders’ ownership interests. 

If we raise additional funds through licensing agreements and strategic collaborations with third parties, we may have to relinquish valuable rights to 

our technology, future revenue streams, research programs, or product candidates or grant licenses on terms that may not be favorable to us. If we are 
unable to raise additional funds, we may be required to delay, limit, reduce and/or terminate development of our product candidates or any future 
commercialization efforts or grant rights to develop and market product candidates that we would otherwise prefer to develop and market ourselves. 

104

 
 
 
Contractual obligations and commitments

We lease certain office space, lab space and lab equipment in Massachusetts, North Carolina and Florida. These leases are used for our continuing 
operations. For a description of our lease obligations, refer to Note 11 to our consolidated financial statements appearing at the end of this Annual Report 
on Form 10-K.

Under various agreements with third-party licensors, we have agreed to make milestone payments and pay royalties to third parties based on 

specified milestones. For a description of our license agreements, see “Business—Strategic partnerships and collaborations/licenses.”

We enter into contracts in the normal course of business with CROs and CMOs for clinical trials, preclinical research studies and testing, 

manufacturing and other services and products for operating purposes. These contracts are cancelable by us upon prior notice of 30 days.

Recently issued accounting pronouncements 

We have reviewed all recently issued standards and have determined that, other than as disclosed in Note 2 to our consolidated financial statements 

appearing at the end of this Annual Report on Form 10-K, such standards will not have a material impact on our consolidated financial statements or do not 
otherwise apply to our operations. 

Emerging growth company status 

The JOBS Act permits an emerging growth company such as us to take advantage of an extended transition period to comply with new or revised 

accounting standards applicable to public companies until those standards would otherwise apply to private companies. We have irrevocably elected to opt 
out of this provision and, as a result, we will comply with new or revised accounting standards when they are required to be adopted by public companies 
that are not emerging growth companies. 

Item 7A. Quantitative and Qualitative Disclosures About Market Risk. 

Interest Rate Risk 

We are exposed to market risk related to changes in interest rates. As of December 31, 2022, our cash equivalents consisted of money market 

accounts that have contractual maturities of less than 90 days from the date of acquisition. As of December 31, 2022, our investments consisted of 
corporate bond securities and treasury bills that have contractual maturities of less than one year. Our primary exposure to market risk is interest income 
sensitivity, which is affected by changes in the general level of U.S. interest rates. However, because of the short-term nature of our portfolio, an immediate 
10% change in market interest rates would not have a material impact on the fair market value of our investment portfolio or on our financial position or 
results of operations. 

Inflation Risk 

Inflation generally affects us by increasing our cost of labor and research, manufacturing and development costs. We do not believe that inflation 

had a material effect on our business, financial condition or results of operations in the last three years. However, our operations may be adversely affected 
by the inflation in the future. 

105

 
Item 8. Financial Statements and Supplementary Data. 

The information required by this Item 8 is included at the end of this Annual Report on Form 10-K beginning on page F-1. 

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure. 

Not applicable.

Item 9A. Controls and Procedures. 

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our Chief Executive Officer and Chief Financial Officer (our principal executive officer and principal 

financial officer, respectively), evaluated the effectiveness of our disclosure controls and procedures as of December 31, 2022. The term "disclosure 
controls and procedures," as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act, refers 
to controls and other procedures of a company that are designed to ensure that information required to be disclosed by a company in the reports that it files 
or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC's rules and forms. 
Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that such information required to be disclosed 
by a company in the reports that it files or submits under the Exchange Act is accumulated and communicated to a company's management, including its 
principal executive and principal financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required 
disclosure.

In designing and evaluating our disclosure controls and procedures, management recognizes that disclosure controls and procedures, no matter how 

well designed and operated, can provide only reasonable, not absolute, assurance that the objectives of the disclosure controls and procedures are met. 
Additionally, in designing disclosure controls and procedures, our management necessarily was required to apply its judgment in evaluating the cost-benefit 
relationship of possible disclosure controls and procedures. The design of any system of controls also is based in part upon certain assumptions about the 
likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; 
over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. 
Because of the inherent limitations in a control system, misstatements due to error or fraud may occur and not be detected.

Based on the evaluation of our disclosure controls and procedures, our Chief Executive Officer and Chief Financial Officer concluded that, as of 

December 31, 2022, our disclosure controls and procedures were effective at the reasonable assurance level.

Management's Annual Report on Internal Control over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) and 

15d-15(f) under the Exchange Act. Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the 
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting 
principles. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any 
evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree 
of compliance with the policies or procedures may deteriorate.

Management conducted an evaluation of the effectiveness of our internal control over financial reporting as of December 31, 2022 based on the 
framework in Internal Control-Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). 
Based on that evaluation, management has concluded that the Company's internal control over financial reporting was effective as of December 31, 2022.

This Annual Report on Form 10-K does not include an attestation report of our independent registered public accounting firm due to a transition 

period established by rules of the SEC for “emerging growth companies”.

106

 
 
 
 
 
 
 
 
Changes in Internal Control over Financial Reporting

There have been no changes in our internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) 

that occurred during the three months ended December 31, 2022 that have materially affected, or are reasonably likely to materially affect, our internal 
control over financial reporting.

Item 9B. Other Information. 

Not applicable. 

Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections. 

Not applicable. 

107

 
PART III 

Item 10. Directors, Executive Officers and Corporate Governance.

Except to the extent provided below, the information required under this Item 10 is incorporated by reference to our definitive proxy statement for 
our 2023 Annual Meeting of Stockholders, which we intend to file with the Securities and Exchange Commission not later than 120 days after the end of 
the fiscal year ended December 31, 2022.

We have adopted a Code of Business Conduct and Ethics, or the Code of Conduct, that applies to our directors, executive officers and employees, 

including our principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions. The 
Code of Conduct is available on the Investor Relations portion of our website, www.solidbio.com. The nominating and corporate governance committee of 
our Board of Directors is responsible for overseeing the Code of Conduct and must approve any waivers of the Code of Conduct for employees, executive 
officers and directors. In addition, we intend to post on our website all disclosures that are required by law or the listing standards of Nasdaq concerning 
any amendments to, or waivers of, any provision of the Code of Conduct. 

Item 11. Executive Compensation. 

The information required under this Item 11 is incorporated by reference to our definitive proxy statement for our 2023 Annual Meeting of 

Stockholders, which we intend to file with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 
31, 2022.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. 

The information required under this Item 12 is incorporated by reference to our definitive proxy statement for our 2023 Annual Meeting of 

Stockholders, which we intend to file with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 
31, 2022.

Item 13. Certain Relationships and Related Transactions, and Director Independence. 

The information required under this Item 13 is incorporated by reference to our definitive proxy statement for our 2023 Annual Meeting of 

Stockholders, which we intend to file with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 
31, 2022.

Item 14. Principal Accounting Fees and Services. 

The information required under this Item 14 is incorporated by reference to our definitive proxy statement for our 2023 Annual Meeting of 

Stockholders, which we intend to file with the Securities and Exchange Commission not later than 120 days after the end of the fiscal year ended December 
31, 2022.

108

 
 
 
Item 15. Exhibits and Financial Statement Schedules. 

(1) Financial Statements: 

PART IV 

Report of Independent Registered Public Accounting Firm (PCAOB ID 238)
Consolidated Balance Sheets at December 31, 2022 and 2021
Consolidated Statements of Operations for the Years Ended December 31, 2022, 2021 and 2020
Consolidated Statements of Comprehensive Loss for the Years Ended December 31, 2022, 2021 and 2020 
Consolidated Statements of Stockholders’ Equity for the Years Ended December 31, 2022, 2021 and 2020 
Consolidated Statements of Cash Flows for the Years Ended December 31, 2022, 2021 and 2020 
Notes to Consolidated Financial Statements

(2) Financial Statement Schedules: 

Page

F-1
F-2
F-3
F-4
F-5
F-6
F-7

All financial statement schedules have been omitted because they are not applicable, not required or the information required is shown in the 

financial statements or the notes thereto. 

(3) Exhibits. The following is a list of exhibits filed as part of this Annual Report on Form 10-K. 

109

 
 
  
Exhibit
Number

2.1

  3.1

  3.2

  4.1

Description

  Agreement and Plan of Merger, dated as of September 29, 2022, by and among Solid Biosciences Inc., Greenland Merger Sub LLC, 
AavantiBio, Inc. and, solely in his capacity as the Equityholder Representative, Doug Swirsky (incorporated by reference to Exhibit 
2.1 to the Current Report on Form 8-K filed on September 30, 2022).

  Certificate of Incorporation of Solid Biosciences Inc., as amended (incorporated by reference to Exhibit 4.1 to the Registration 

Statement on Form S-8 filed on December 2, 2022). 

  Bylaws of Solid Biosciences Inc. (incorporated by reference to Exhibit 4.2 to the Registration Statement on Form S-8 filed on January 

29, 2018). 

Specimen Common Stock Certificate (incorporated by reference to Exhibit 4.1 to the Registration Statement on Form S-1 filed on 
December 29, 2017). 

  4.2*

  Description of the Company’s Securities Registered under Section 12 of the Exchange Act.

10.1†

  Amended and Restated Registration Rights Agreement dated March 29, 2017 by and among Solid Biosciences, LLC and certain 
investors (incorporated by reference to Exhibit 10.17 to the Registration Statement on Form S-1 filed on December 29, 2017). 

10.2†

  Employment Agreement, dated as of January 25, 2019, by and between Solid Biosciences Inc. and Ilan Ganot. (incorporated by 

reference to Exhibit 10.2 to the Annual Report on Form 10-K filed on March 13, 2019). 

10.3†

  Employment Agreement, dated as of March 1, 2021, by and between Solid Biosciences Inc. and Erin Powers Brennan (incorporated by 

reference to Exhibit 10.4 to the Annual Report on Form 10-K filed on March 14, 2022).

10.4†

10.5†

10.6†

10.7†

10.8†

Solid Biosciences, LLC Amended and Restated Equity Incentive Plan and form of unit restriction agreement (incorporated by 
reference to Exhibit 10.7 to the Annual Report on Form 10-K filed on March 29, 2018). 

Solid Biosciences Inc. 2018 Omnibus Incentive Plan (incorporated by reference to Exhibit 99.1 to the Registration Statement on Form 
S-8 filed on January 29, 2018). 

Form of Incentive Stock Option Agreement under 2018 Omnibus Incentive Plan. (incorporated by reference to Exhibit 10.7 to the 
Annual Report on Form 10-K filed on March 13, 2019).  

Form of Nonqualified Stock Option Agreement under 2018 Omnibus Incentive Plan. (incorporated by reference to Exhibit 10.8 to the 
Annual Report on Form 10-K filed on March 13, 2019).  

Form of Restricted Stock Agreement under 2018 Omnibus Incentive Plan (incorporated by reference to Exhibit 10.9 to the 
Registration Statement on Form S-1 filed on December 29, 2017). 

10.9#

  Exclusive Patent License Agreement, dated as of October 16, 2015, by and between Solid GT, LLC and the University of Washington 

(incorporated by reference to Exhibit 10.10 to the Registration Statement on Form S-1 filed on December 29, 2017). 

10.10#

10.11†

10.12*†

10.13

10.14

  License Agreement, dated as of October 15, 2015, by and between Solid GT, LLC and The Curators of the University of Missouri 
(incorporated by reference to Exhibit 10.12 to Amendment No. 1 to the Registration Statement on Form S-1 filed on January 16, 
2018).

Form of Indemnification Agreement for Directors and Officers (incorporated by reference to Exhibit 10.16 to the Registration 
Statement on Form S-1 filed on December 29, 2017). 

Summary of Non-Employee Director Compensation Program.

Securities Purchase Agreement, dated July 25, 2019, by and among the Company and the other parties thereto (incorporated by 
reference to Exhibit 10.1 to the Current Report on Form 8-K filed on July 26, 2019).

Form of Pre-Funded Warrant to Purchase Common Stock to be issued pursuant to the Securities Purchase Agreement (incorporated by 
reference to Exhibit 10.2 to the Current Report on Form 8-K filed on July 26, 2019).

10.15

  Registration Rights Agreement, dated July 25, 2019, by and among the Company and the other parties thereto (incorporated by 

reference to Exhibit 10.3 to the Current Report on Form 8-K filed on July 26, 2019).

110

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.16†

  Consulting Agreement, dated as of November 19, 2020, by and between Solid Biosciences Inc. and Danforth Advisors, LLC. 

(incorporated by reference to Exhibit 10.24 to the Annual Report on Form 10-K filed on March 15, 2021).

10.17*†

  Executive Chair Agreement, effective January 1, 2022, by and between Solid Biosciences Inc. and Ian F. Smith, as amended by the 

First Amendment to Executive Chair Agreement, effective September 30, 2022.

10.18†

  Amended and Restated 2020 Equity Incentive Plan (incorporated by reference to Exhibit 99.1 to the Current Report on Form 8-K filed 

on December 1, 2022).

10.19†

  Form of Stock Option Agreement under the 2020 Equity Incentive Plan (incorporated by reference to Exhibit 10.4 to the Quarterly 

Report on Form 10-Q filed on August 6, 2020).

10.20†

  Form of Restricted Stock Unit Agreement under the 2020 Equity Incentive Plan (incorporated by reference to Exhibit 10.28 to the 

Annual Report on Form 10-K filed on March 14, 2022).

10.21#

  Collaboration and License Agreement, dated as of October 22, 2020, by and between the Company and Ultragenyx Pharmaceutical 

Inc. (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q filed on November 5, 2020).

10.22

  Stock Purchase Agreement, dated as of October 22, 2020, by and between the Company and Ultragenyx Pharmaceutical Inc. 

(incorporated by reference to Exhibit 10.2 to the Quarterly Report on Form 10-Q filed on November 5, 2020).

10.23#

Investor Agreement, dated as of October 22, 2020, by and between the Company and Ultragenyx Pharmaceutical Inc. (incorporated by 
reference to Exhibit 10.3 to the Quarterly Report on Form 10-Q filed on November 5, 2020).

10.24#

  First Amendment, dated as of October 9, 2020, to the Exclusive Patent License by and between the Company and the University of 

Washington (incorporated by reference to Exhibit 10.4 to the Quarterly Report on Form 10-Q filed on November 5, 2020).

10.25

10.26

10.27#

  Securities Purchase Agreement, dated December 10, 2020, by and among the Company and the other parties thereto (incorporated by 

reference to Exhibit 10.1 to the Current Report on Form 8-K filed on December 11, 2020).

  Registration Rights Agreement, dated December 10, 2020, by and among the Company and the other parties thereto (incorporated by 

reference to Exhibit 10.2 to the Current Report on Form 8-K filed on December 11, 2020).

  First Amendment, dated as of January 27, 2021, to the Exclusive Patent License by and between the Company and the Curators of the 
University of Missouri (incorporated by reference to Exhibit 10.36 to the Annual Report on Form 10-K filed on March 14, 2021).

10.28

  Lease, dated June 15, 2021, between Solid Biosciences Inc. and Hood Park LLC (incorporated by reference to Exhibit 10.1 to the 

Quarterly Report on Form 10-Q filed on August 16, 2021).

10.29†

2021 Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.1 to the Quarterly Report on Form 10-Q filed on 
November 3, 2021).

10.30†

  Form of Nonstatutory Inducement Stock Option Agreement (incorporated by reference to Exhibit 10.4 to the Quarterly Report on 

Form 10-Q filed on August 16, 2021).

10.31†

10.32

10.33

10.34

Form of Inducement Restricted Stock Unit Award Agreement (incorporated by reference to Exhibit 99.5 to the Registration Statement 
on Form S-8 filed on August 16, 2021).

  Sales Agreement, dated March 13, 2019, by and between the Company and Jefferies LLC, as amended by Amendment No. 1 to the 

Sales Agreement, dated August 16, 2021, by and between the Company and Jefferies LLC (incorporated by reference to Exhibit 10.2 
to the Quarterly Report on Form 10-Q filed on November 3, 2021).

Form of Parent Support Agreement (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed on September 
30, 2022).

Form of Support and Joinder Agreement (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed on 
September 30, 2022).

111

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.35

Securities Purchase Agreement, dated September 29, 2022, by and among Solid Biosciences Inc. and the persons party thereto 
(incorporated by reference to Exhibit 10.3 to the Current Report on Form 8-K filed on September 30, 2022).

10.36

  Registration Rights Agreement, dated September 29, 2022, by and among Solid Biosciences Inc. and the persons party thereto 

(incorporated by reference to Exhibit 10.4 to the Current Report on Form 8-K filed on September 30, 2022).

10.37†

10.38†

Employment Agreement, dated September 29, 2022, by and between Solid Biosciences Inc. and Alexander Cumbo (incorporated by 
reference to Exhibit 10.5 to the Current Report on Form 8-K filed on September 30, 2022).

Executive Transition and Separation Agreement, dated September 29, 2022, by and between Solid Biosciences Inc. and Ilan Ganot 
(incorporated by reference to Exhibit 10.6 to the Current Report on Form 8-K filed on September 30, 2022).

10.39†

  Consulting Agreement, dated September 29, 2022, by and between Solid Biosciences Inc. and Ilan Ganot (incorporated by reference to 

Exhibit 10.7 to the Current Report on Form 8-K filed on September 30, 2022).

10.40†

Executive Transition and Separation Agreement, dated September 29, 2022, by and between Solid Biosciences Inc. and Erin Powers 
Brennan (incorporated by reference to Exhibit 10.8 to the Current Report on Form 8-K filed on September 30, 2022).

10.41†

  Consulting Agreement, dated September 29, 2022, by and between Solid Biosciences Inc. and Erin Powers Brennan (incorporated by 

reference to Exhibit 10.9 to the Current Report on Form 8-K filed on September 30, 2022).

10.42*#

10.43*#

21.1*

23.1*

31.1*

31.2*

Standard Exclusive License Agreement With Know-How (Agreement No. A19110), dated as of March 17, 2020, by and between 
AavantiBio, Inc. and University of Florida Research Foundation, Incorporated, as amended on August 23, 2022.

Standard Exclusive License Agreement With Know-How (Agreement No. A19111), dated as of March 17, 2020, by and between 
AavantiBio, Inc. and University of Florida Research Foundation, Incorporated, as amended on May 25, 2021 and August 23, 2022.

  Subsidiaries of Solid Biosciences Inc. 

  Consent of PricewaterhouseCoopers LLP, Independent Registered Public Accounting Firm.

  Certification of Chief Executive Officer of the Registrant Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 

  Certification of Chief Financial Officer of the Registrant Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. 

32.1**

  Certification of Chief Executive Officer of the Registrant Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of 

the Sarbanes-Oxley Act of 2002. 

32.2**

  Certification of Chief Financial Officer of the Registrant Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the 

101.INS

101.SCH

101.CAL

101.DEF

Sarbanes-Oxley Act of 2002. 

Inline XBRL Instance Document.

Inline XBRL Taxonomy Extension Schema Document.

Inline XBRL Taxonomy Extension Calculation Linkbase Document.

Inline XBRL Taxonomy Extension Definition Linkbase Document. 

1010.LAB

Inline XBRL Taxonomy Extension Label Linkbase Document. 

101.PRE

Inline XBRL Taxonomy Extension Presentation Linkbase Document. 

104

  Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101). 

* Filed herewith. 
** Furnished herewith. 
† Indicates management contract or compensatory plan. 
# Certain portions of this exhibit have been omitted because they are not material and contain information that the Registrant customarily and actually 
treats as private or confidential. 

112

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 16. Form 10-K Summary. 

Not applicable. 

113

 
  
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this Report 

to be signed on its behalf by the undersigned, thereunto duly authorized. 

SIGNATURES 

Date: March 23, 2023

SOLID BIOSCIENCES INC.

By:

/s/ Alexander Cumbo
Alexander Cumbo
President, Chief Executive Officer and Director
(Principal Executive Officer)

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, this Report has been signed below by the following persons on 

behalf of the Registrant in the capacities and on the dates indicated. 

President, Chief Executive Officer and Director
(Principal Executive Officer)

Chief Financial Officer
(Principal Financial and Accounting Officer)

March 23, 2023

March 23, 2023

Chairman of the Board

March 23, 2023

/s/ Alexander Cumbo

Alexander Cumbo

/s/ Kevin Tan

Kevin Tan

/s/ Ian F. Smith

Ian F. Smith

/s/ Martin Freed

Martin Freed

/s/ Ilan Ganot
Ilan Ganot

/s/ Robert Huffines

Robert Huffines

/s/ Clare Kahn
Clare Kahn

/s/ Georgia Keresty
Georgia Keresty

/s/ Adam Koppel

Adam Koppel

Director

Director

Director

Director

Director

Director

/s/ Sukumar Nagendran

Director

Sukumar Nagendran

/s/ Rajeev Shah

Rajeev Shah

/s/ Adam Stone

Adam Stone

Director

Director

/s/ Lynne Sullivan

Director

Lynne Sullivan

114

March 23, 2023

March 23, 2023

March 23, 2023

March 23, 2023

March 23, 2023

March 23, 2023

March 23, 2023

March 23, 2023

March 23, 2023

March 23, 2023

 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
  
 
  
 
  
 
  
 
 
 
 
 
  
 
 
 
  
 
  
 
 
  
 
  
 
  
 
Report of Independent Registered Public Accounting Firm 

To the Board of Directors and Stockholders of Solid Biosciences Inc. 

Opinion on the Financial Statements 

We have audited the accompanying consolidated balance sheets of Solid Biosciences Inc. and its subsidiaries (the “Company”) as of December 31, 2022 
and 2021, and the related consolidated statements of operations, of comprehensive loss, of stockholders’ equity and of cash flows for each of the three 
years in the period ended December 31, 2022, including 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 as of December 31, 2022 and 
2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2022 in conformity with accounting 
principles generally accepted in the United States of America.

Basis for Opinion 

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s 
consolidated 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 of these consolidated financial statements in accordance with the standards of the PCAOB. Those standards require that we plan 
and perform the audits to obtain reasonable assurance about whether the consolidated 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 consolidated 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 consolidated 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 consolidated financial statements. We believe that our audits provide a reasonable basis 
for our opinion.

/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
March 23, 2023

We have served as the Company’s auditor since 2017.

F-1

 
 
 
 
SOLID BIOSCIENCES INC. 
CONSOLIDATED BALANCE SHEETS 
(In thousands, except share and per share data) 

Assets
Current assets:

Cash and cash equivalents
Available-for-sale securities
Prepaid expenses and other current assets
Accounts receivable - related party

Total current assets

Operating lease, right-of-use asset
Property and equipment, net
Other non-current assets
Restricted cash
Total assets

Liabilities and Stockholders' Equity
Current liabilities:

Accounts payable
Accrued expenses
Operating lease liabilities
Finance liabilities and finance lease liabilities
Deferred revenue - related party
Other current liabilities
Total current liabilities

Operating lease liabilities, excluding current portion
Finance liabilities and finance lease obligations, excluding current portion
Other non-current liabilities

Total liabilities

Commitments and Contingencies (Note 12)
Stockholders’ Equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized
  at December 31, 2022 and December 31, 2021; no shares issued and
  outstanding at December 31, 2022 and December 31, 2021
Common stock, $0.001 par value; 60,000,000 shares authorized at December 31, 2022 and 20,000,000 shares authorized at
   December 31, 2021; 19,556,732 shares issued and outstanding at December 31, 2022 and 7,356,017
   shares issued and outstanding at December 31, 2021; 0 pre-funded warrants outstanding at
   December 31, 2022 and 143,888 pre-funded warrants outstanding at December 31, 2021

Additional paid-in capital
Accumulated other comprehensive loss
Accumulated deficit

Total stockholders' equity
Total liabilities and stockholders' equity

December 31,

2022

2021

  $

  $

  $

155,384  
58,338  
5,916  
—  
219,638  
28,949  
9,657  
175  
1,833  
260,252  

3,238  
16,691  
1,897  
668  
—  
14  
22,508  
24,279  
1,703  
96  
48,586  

119,136  
88,643  
14,723  
110  
222,612  
1,142  
6,462  
94  
2,070  
232,380  

4,463  
9,528  
1,263  
232  
8,080  
35  
23,601  
275  
293  
—  
24,169  

—  

—  

20  
774,452  

(68 )  
(562,738 )  
211,666  
260,252  

  $

7  
685,006  
(45 )
(476,757 )
208,211  
232,380  

  $

  $

  $

  $

The accompanying notes are an integral part of these consolidated financial statements. 

F-2

 
 
 
 
 
 
 
   
 
 
 
   
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SOLID BIOSCIENCES INC.
CONSOLIDATED STATEMENTS OF OPERATIONS 
(In thousands, except share and per share data) 

Year Ended December 31,
2021

2022

2020

  $

8,094     $

13,620     $

—  

78,420    
28,948    
7,178    
114,546    
(106,452 )  

2,616    
18,236    
(381 )  
20,471    
(85,981 )   $
(10.10 )   $

58,739    
27,135    
—    
85,874    
(72,254 )  

64    
—    
2    
66    
(72,188 )   $
(10.14 )   $

64,881  
21,581  
1,944  
88,406  
(88,406 )

115  
—  
1  
116  
(88,290 )

(25.50 )

  $
  $

Revenue
Operating expenses:

Research and development
General and administrative
Restructuring expense

Total operating expenses

Loss from operations
Other income, net:

Interest income, net
Gain on acquisition
Other (loss) income, net
Total other income, net

Net loss

Net loss per share, basic and diluted

Weighted average common stock outstanding, basic and diluted

8,512,089    

7,118,024    

3,462,475  

The accompanying notes are an integral part of these consolidated financial statements. 

F-3

 
 
 
 
 
 
 
   
   
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SOLID BIOSCIENCES INC.
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS 
(In thousands) 

Net loss
Other comprehensive loss:

Unrealized loss on available-for-sale securities

Comprehensive loss

Year Ended December 31,
2021

2022

2020

  $

(85,981 )   $

(72,188 )   $

(88,290 )

  $

(23 )  
(86,004 )   $

(45 )  
(72,233 )   $

(1 )
(88,291 )

The accompanying notes are an integral part of these consolidated financial statements. 

F-4

 
 
 
 
 
 
 
   
   
 
 
     
     
   
 
 
 
 
 
SOLID BIOSCIENCES INC.
CONSOLIDATED STATEMENTS STOCKHOLDERS’ EQUITY
(In thousands except for share data) 

Additional
paid 
in capital

Accumulated
other
comprehensive
income (loss)

Accumulated
Deficit

Total
Equity
(Deficit)

Balance at December 31, 2019

Equity-based
   compensation
Sale of common stock,
   net of issuance costs
   of $3,790
Issuance of common stock, to a related party,
 in connection with the Stock Purchase Agreement
Vesting of restricted stock units
Forfeiture of restricted stock awards
Unrealized loss on available-for-sale securities
Net loss

Balance at December 31, 2020

Equity-based
   compensation
Sale of common stock,
   net of issuance costs
   of $8,872
Exercise of common stock options
Issuance of ESPP shares
Vesting of restricted stock units
Forfeiture of restricted stock awards
Unrealized loss on available-for-sale securities
Net loss

Balance at December 31, 2021

Equity-based
   compensation
Sale of common stock,
   net of issuance costs
   of $2,449
Exercise of pre-funded warrants
Issuance of ESPP shares
Vesting of restricted stock units
Issuance of shares
  in connection with acquisition
Unrealized loss on available-for-sale securities
Net loss

Common
Stock

Amount

3,218,884   $

—  

2,042,263  

521,719  
27,180  
(6,559 )
—  
—  
5,803,487  

-  

1,666,666  
775  
2,978  
27,946  
(1,947 )
-  
-  

7,499,905  

—  

10,638,290  
—  
29,130  
35,149  

1,354,258  
—  
—  

3   $

—  

2    

1    

—  
—  
—  
6  

—  

1  
—  
—  
—  
—  
—  
—  

7  

—  

11  
—  
1  
—  

1  
—  
—  

396,323   $

1   $

(316,279 ) $

11,629  

109,416  

19,281  

—  
—  
—  
536,649  

13,373  

134,877  
41  
66  
—  
—  
—  
—  

685,006  

7,537  

72,540  
22  
180  
—  

9,167  
—  
—  

—  

—  

—  

—  
(1 )
—  
—  

—  

—  
—  
—  
—  
—  
(45 )
-  

(45 )

—  

—  
—  
—  
—  

—  
(23 )
—  

—  

—  

—  

—  
—  
(88,290 )
(404,569 )

—  

—  
—  
—  
—  
—  
—  
(72,188 )

(476,757 )

—  

—  
—  
—  
—  

—  
—  
(85,981 )

Balance at December 31, 2022

19,556,732   $

20   $

774,452   $

(68 ) $

(562,738 ) $

The accompanying notes are an integral part of these consolidated financial statements.

F-5

80,048  

11,629  

109,418  

19,282  

—  
(1 )
(88,290 )
132,086  

13,373  

134,878  
41  
66  
—  
—  
(45 )
(72,188 )

208,211  

7,537  

72,551  
22  
181  
—  

9,168  
(23 )
(85,981 )

211,666  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SOLID BIOSCIENCES INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS 
(In thousands) 

Operating activities:

Net loss
Adjustments to reconcile net loss to net cash used in operating activities:
Net amortization of premium/(discount) on available-for-sale securities
Equity-based compensation expense
Depreciation and amortization expense
Loss on sale of property and equipment
Gain on lease termination
Gain on acquisition
Changes in operating assets and liabilities:

Prepaid expenses and other current and non-current assets
Accounts receivable - related party
Accounts payable
Accrued expenses and other current and non-current liabilities
Deferred revenue - related party, current and non-current

Net cash used in operating activities

Investing activities:

Purchases of property and equipment
Acquisition of business, net of cash received
Proceeds from sale of property and equipment
Proceeds from sales and maturities of available-for-sale securities
Purchases of available-for-sale securities

Net cash provided by (used in) investing activities

Financing activities:

Proceeds from the issuance of common stock to a 
   related party in connection with the Stock Purchase Agreement
Proceeds from issuance of common stock, net of issuance costs
Proceeds from financing liabilities
Payment of offering costs
Proceeds for exercise of stock options
Proceeds from exercise of pre-funded warrants
Employee stock purchases and withholdings
Repayment of financing liabilities

Net cash provided by financing activities

Net increase (decrease) in cash, cash equivalents and restricted cash
Cash, cash equivalents, and restricted cash at beginning of period
Cash, cash equivalents, and restricted cash at end of period

Supplemental disclosure of non-cash investing and financing activities:

Issuance of common stock in acquisition

Decrease in right-of-use assets and lease liability due to lease termination

Right-of-use assets obtained in exchange for operating lease liabilities

Property and equipment included in accounts payable and accruals

2022

Year Ended December 31,
2021

2020

  $

(85,981 )   $

(72,188 )   $

(88,290 )

233  
7,537  
2,408  
—  
(249 )  
(18,236 )  

3,695  
110  
(5,246 )  
5,832  
(8,080 )  
(97,977 )  

(3,015 )  
31,523  
600  
212,811  
(182,762 )  
59,157  

—  
72,551  
2,143  
—  
—  
22  
181  
(66 )  

74,831  
36,011  
121,206  
157,217  

  $

9,168  
(464 )   $

29,126  

527  

  $

1,117  
13,373  
2,964  
92  
(81 )  
—  

(9,247 )  
(110 )  
1,209  
(2,255 )  
(12,638 )  
(77,764 )  

(1,281 )  
—  
—  
51,444  
(141,249 )  
(91,086 )  

—  
134,878  

—  
41  
—  
66  
—  
134,985  
(33,865 )  
155,071  
121,206  

  $

—  
(1,233 )  
—  

104  

  $

(20 )
11,629  
3,922  
—  
—  
—  

30  
—  
(3,431 )
(1,157 )
20,718  
(56,599 )

(899 )
—  
—  
7,900  
(401 )
6,600  

19,282  
113,208  

(3,790 )
—  
—  
—  
—  
128,700  
78,701  
76,370  
155,071  

—  

—  

—  

20  

  $

  $
  $
  $
  $

The accompanying notes are an integral part of these consolidated financial statements. 

F-6

 
 
 
 
 
 
 
   
   
 
 
 
   
 
   
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 SOLID BIOSCIENCES INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS 
(Amounts in thousands, except share and per share data) 

1. Nature of the Business and Basis of Presentation 

Nature of Business 

Solid Biosciences Inc. was organized in March 2013 under the name SOLID Ventures Management, LLC and operated as a Delaware limited liability 
company until immediately prior to the effectiveness of its registration statement on Form S-1 on January 25, 2018, at which time it completed a statutory 
corporate conversion into a Delaware corporation (the “Corporate Conversion”) and changed its name to Solid Biosciences Inc. (the “Company”). On 
December 2, 2022, the Company completed its acquisition of AavantiBio, Inc. (“AavantiBio”), a privately held gene therapy company focused on 
transforming the lives of patients with Friedreich’s ataxia ("FA") and rare cardiomyopathies (the “Acquisition”). Upon the consummation of the acquisition, 
the Company acquired AavantiBio’s candidates, AVB-202-TT and AVB-401, as well as additional assets for the treatment of undisclosed cardiac diseases. 
AavantiBio is a wholly owned subsidiary of the Company.

The Company is a life science company focused on advancing a portfolio of neuromuscular and cardiac programs, including SGT-003, a differentiated gene 
therapy candidate, for the treatment of Duchenne muscular dystrophy ("Duchenne"); AVB-202-TT, a gene therapy program for the treatment of FA; AVB-
401, a gene therapy program for the treatment of BAG3-mediated dilated cardiomyopathy; and additional assets for the treatment of undisclosed cardiac 
diseases. The Company aims to be a center of excellence, bringing together those with expertise in science, technology, disease management and care. 
Patient-focused and founded by those directly impacted by Duchenne, the Company's mandate is to improve the daily lives of patients living with these 
devastating diseases.

The Company is subject to risks and uncertainties common to early-stage companies in the biotechnology industry, including, but not limited to, 
development by competitors of new technological innovations, dependence on licenses, protection of proprietary technology, dependence on key personnel, 
compliance with government regulations and the need to obtain additional financing to fund operations. Product candidates currently under development 
will require significant additional research and development efforts, including extensive preclinical studies and clinical trials and regulatory approval, prior 
to commercialization. These efforts require significant amounts of additional capital, adequate personnel infrastructure and extensive compliance and 
reporting capabilities.

The Company’s candidates are in development. There can be no assurance that the Company’s research and development will be successfully completed, 
that adequate protection for the Company’s intellectual property will be obtained, that any products developed will obtain necessary government regulatory 
approval or that any approved products will be commercially viable. Even if the Company’s product development efforts are successful, it is uncertain 
when, if ever, the Company will generate significant revenue from product sales. The Company operates in an environment of rapid change in technology 
and substantial competition from, among others, other pharmaceutical and biotechnology companies. In addition, the Company is dependent upon the 
services of its employees, partners and consultants. 

On October 27, 2022, the Company effected a reverse stock split of its outstanding shares of common stock at a ratio of one-for-15 pursuant to a certificate 
of amendment to its certificate of incorporation filed with the Secretary of State of the State of Delaware. The reverse stock split was reflected on Nasdaq 
beginning with the opening of trading on October 28, 2022. Pursuant to the reverse stock split, every 15 shares of the Company's issued and outstanding 
shares of common stock were automatically combined into one issued and outstanding share of common stock, without any change in the par value per 
share of the common stock. The reverse stock split reduced the authorized number of shares of common stock from 300,000,000 to 20,000,000 and, 
pursuant to the certificate of amendment, such reduced authorized number of shares of common stock was subsequently multiplied by three, such that 
following the reverse stock split the Company has 60,000,000 shares of common stock authorized. The reverse stock split affected all issued and 
outstanding shares of the Company's common stock, and the respective numbers of shares of common stock underlying the Company’s outstanding stock 
options, outstanding restricted stock units, outstanding warrants and the Company's equity incentive plans were proportionately adjusted. All share and per 
share amounts of the common stock included in the accompanying consolidated financial statements have been retrospectively adjusted to give effect to the 
reverse stock split for all periods presented, including reclassifying an amount equal to the reduction in par value to additional paid-in capital.

F-7

 
Liquidity 

The accompanying consolidated financial statements have been prepared on a basis that assumes the Company will continue as a going concern and which 
contemplates the realization of assets and satisfaction of liabilities and commitments in the ordinary course of business. Through December 31, 2022, the 
Company has funded its operations primarily with the proceeds from the sale of redeemable preferred units and member units as well as the sale of 
common stock and prefunded warrants to purchase shares of its common stock in private placements and the sale of common stock in its initial public 
offering and follow-on public offering in March 2021 and under its at-the-market sales agreement.

On September 29, 2022, the Company entered into the securities purchase agreement, pursuant to which, on December 2, 2022, the Company issued an 
aggregate of 10,638,290 shares of the Company’s common stock in a private placement. The private placement closed immediately following the closing of 
the acquisition on December 2, 2022. The Company received net proceeds from the private placement of $72,551.

In accordance with Accounting Standards Codification (“ASC”) 205-40, Going Concern, the Company has evaluated whether there are conditions and 
events, considered in the aggregate, that raise substantial doubt about the Company’s ability to continue as a going concern within one year after the date 
the financial statements are issued. As of December 31, 2022, the Company had an accumulated deficit of $562,738. During the year ended December 31, 
2022, 2021 and 2020, the Company incurred a net loss of $85,981, $72,188 and $88,290, respectively. The Company used $97,977 of cash in operations for 
the year ended December 31, 2022. The Company expects to continue to generate operating losses in the foreseeable future. Based upon its current 
operating plan, the Company expects that its cash, cash equivalents and available-for-sale securities of $213,722, excluding restricted cash of $1,833, as of 
December 31, 2022, will be sufficient to fund its operating expenses and capital expenditure requirements for at least twelve months from the date of 
issuance of these financial statements. However, the Company has based this estimate on assumptions that may prove to be wrong, and its operating plan 
may change as a result of many factors currently unknown to it. As a result, the Company could deplete its capital resources sooner than it currently 
expects. The Company expects to finance its future cash needs through a combination of equity offerings, debt financings, collaborations, strategic 
alliances or licensing arrangements. If the Company is unable to obtain funding, the Company would be forced to delay, reduce or eliminate some or all of 
its research and development programs, preclinical and clinical testing or commercialization efforts, which could adversely affect its business prospects.

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States 
of America (“GAAP”). The accompanying consolidated financial statements include the accounts of the Company and its wholly owned or controlled 
subsidiaries. All intercompany accounts and transactions have been eliminated. 

2. Summary of Significant Accounting Policies 

Use of Estimates 

The preparation of the Company’s consolidated financial statements in conformity with GAAP requires management to make estimates, judgments and 
assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the consolidated 
financial statements and the reported amounts of revenues and expenses during the reporting periods. Significant estimates and assumptions reflected in 
these consolidated financial statements include, but are not limited to, estimates related to revenue recognition, the recognition of research and development 
expenses and equity-based compensation. Estimates are periodically reviewed in light of changes in circumstances, facts and experience. Changes in 
estimates are recorded in the period in which they become known. Actual results could differ from the Company’s estimates. 

F-8

 
The full extent to which the COVID-19 pandemic will directly or indirectly impact the Company’s business, results of operations and financial condition, 
including clinical trials and employee-related amounts, will depend on future developments that are highly uncertain, including new information that may 
emerge concerning COVID-19 and the actions taken to contain it or treat its impact. The Company has made estimates of the impact of COVID-19 within 
its financial statements and there may be changes to those estimates in future periods. Actual results could differ from the Company’s estimates.

Cash Equivalents 

The Company considers all short-term, highly liquid investments with original maturities of 90 days or less at acquisition date to be cash equivalents. 

Restricted Cash 

The Company held restricted cash of $1,833 and $2,070 in separate restricted bank accounts as security deposits for leases of the Company’s facilities as of 
December 31, 2022 and December 31, 2021, respectively. The Company has included restricted cash of $1,833 and $2,070 as a non-current asset as of 
December 31, 2022 and December 31, 2021, respectively. A reconciliation of the amounts of cash and cash equivalents and restricted cash from the cash 
flow statement to the balance sheet is as follows:      

December 31,
2022

December 31,
2021

December 31,
2020

December 31,
2019

Cash and cash equivalents
Restricted cash, non-current
Cash and cash equivalents and restricted 
cash

  $

  $

155,384     $
1,833      

119,136     $
2,070      

154,744     $
327      

157,217     $

121,206     $

155,071     $

76,043  
327  

76,370  

Available-for-Sale Securities 

Available-for-sale securities consist of investments with original maturities greater than 90 days at acquisition date. The Company has classified its 
investments with maturities beyond one year as short term, based on their highly liquid nature and because such available-for-sale securities represent the 
investment of cash that is available for current operations. 

The Company classifies all of its investments as available-for-sale securities. The Company’s investments are measured and reported at fair value using 
quoted prices in active markets for similar securities. Unrealized gains and losses on available-for-sale debt securities are reported as a separate component 
of stockholders’ equity. The cost of debt securities sold is determined on a specific identification basis, and realized gains and losses are included in other 
income (expense) within the consolidated statement of operations. If any adjustment to fair value reflects a decline in the value of the investment that the 
Company considers to be “other than temporary,” the Company reduces the investment to fair value through a charge to the consolidated statement of 
operations. No such adjustments were necessary during the periods presented. 

Concentration of Credit Risk and of Significant Suppliers 

Financial instruments that potentially expose the Company to concentrations of credit risk consist primarily of cash, cash equivalents and available-for-sale 
securities. Periodically, the Company maintains deposits in accredited financial institutions in excess of federally insured limits. The Company maintains 
each of its cash, cash equivalents and available-for-sale securities balances with high-quality and accredited financial institutions and accordingly, such 
funds are not exposed to significant credit risk. The Company does not believe that it is subject to unusual credit risk beyond the normal credit risk 
associated with commercial banking relationships. 

The Company is dependent on third-party manufacturers to supply products for research and development activities of its programs, including clinical and 
preclinical testing. These programs could be adversely affected by a significant interruption in the supply of such drug substance products. 

F-9

 
 
 
 
   
   
   
 
   
Fair Value Measurements 

Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or paid to 
transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants 
on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of 
unobservable inputs. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three levels of the fair 
value hierarchy, of which the first two are considered observable and the last is considered unobservable: 

•

•

•

Level 1—Quoted prices in active markets for identical assets or liabilities. 

Level 2—Observable inputs (other than Level 1 quoted prices), such as quoted prices in active markets for similar assets or liabilities, quoted 
prices in markets that are not active for identical or similar assets or liabilities or other inputs that are observable or can be corroborated by 
observable market data. 

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to determining the fair value of the 
assets or liabilities, including pricing models, discounted cash flow methodologies and similar techniques. 

The Company’s cash equivalents and available-for-sale securities are carried at fair value, determined according to the fair value hierarchy described above. 
See Note 5, Fair Value of Financial Assets and Liabilities, for additional information. The carrying values of the Company’s accounts payable and accrued 
expenses and other current liabilities approximate their fair value due to the short-term nature of these liabilities. 

Leases

At inception of a contract, the Company determines if a contract meets the definition of a lease. A lease is a contract, or part of a contract, that conveys the 
right to control the use of identified property, plant, or equipment (an identified asset) for a period of time in exchange for consideration. The Company 
determines if the contract conveys the right to control the use of an identified asset for a period of time. The Company assesses throughout the period of use 
whether the Company has both of the following: (1) the right to obtain substantially all of the economic benefits from use of the identified asset and (2) the 
right to direct the use of the identified asset. This determination is reassessed if the terms of the contract are changed. Leases are classified as operating or 
finance leases based on the terms of the lease agreement and certain characteristics of the identified asset. Right-of-use assets and lease liabilities are 
recognized at the lease commencement date based on the present value of the minimum future lease payments. Adjustments to the right-of-use asset may be 
required for items such as lease prepayments or incentives received. The Company’s policy is to not record leases with an original term of twelve months or 
less on the consolidated balance sheets. The Company recognizes lease expense for these short-term leases on a straight-line basis over the lease term. 
Certain lease agreements include rental payments that are adjusted periodically for inflation or other variables. In addition to rent, the leases may require 
the Company to pay additional amounts for taxes, insurance, maintenance and other expenses, which are generally referred to as non-lease components. 
Such adjustments to rental payments and variable non-lease components are treated as variable lease payments and recognized in the period in which the 
obligation for these payments was incurred. Variable lease components and variable non-lease components are not measured as part of the right-of-use asset 
and liability. Only when lease components and their associated non-lease components are fixed are they accounted for as a single lease component and 
recognized as part of a right-of-use asset and liability. Total contract consideration is allocated to the combined fixed lease and non-lease components.

Property and Equipment 

Property and equipment are stated at cost less accumulated depreciation. Depreciation expense is recognized using the straight-line method over the useful 
life of the asset. Laboratory equipment is depreciated over five years. Computer equipment is depreciated over three years. Computer software is 
depreciated over two years. Furniture and office equipment are depreciated over five years. Leasehold improvements are amortized over the shorter of the 
lease term or the estimated useful life of the related asset. Expenditures for repairs and maintenance of assets are charged to expense as incurred. Upon 
retirement or sale, the cost and related accumulated depreciation of assets disposed of are removed from the accounts and any resulting gain or loss is 
included in loss from operations. Equipment under a finance lease is stated at fair value at the inception of the lease less accumulated depreciation and is 
depreciated over the remaining lease term or the estimated useful life of the equipment.

F-10

 
Impairment of Long-Lived Assets 

Long-lived assets, comprised of property and equipment, 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 for 
recoverability, the Company compares forecasts of undiscounted cash flows expected to result from the use and eventual disposition of the long-lived asset 
to its carrying value. An impairment loss would be recognized when estimated undiscounted future cash flows expected to result from the use of an asset 
are less than its carrying amount. The impairment loss would be based on the excess of the carrying value of the impaired asset over its fair value, 
determined based on discounted cash flows. To date, the Company has not recorded any impairment losses or disposals on long-lived assets. 

Revenue Recognition

The Company recognizes revenue in accordance with 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. 

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.

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 reversal in the amount of cumulative revenue recognized 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.

F-11

 
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. 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 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 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.

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 reversal in the amount of cumulative revenue recognized would not occur, the associated milestone value is included in the 
transaction price. Milestone payments that are not within the control of the Company, 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 reversal in the amount of cumulative revenue recognized 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 reversal in the amount of cumulative revenue recognized would not occur.

F-12

 
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.

Collaboration Revenue

The Company analyzes its collaboration arrangements to assess whether they are within the scope of ASC 808, Collaborative Arrangements (“ASC 808”) 
to determine whether such arrangements involve joint operating activities performed by parties that are both active participants in the activities and exposed 
to significant risks and rewards dependent on the commercial success of such activities. This assessment is performed throughout the life of the 
arrangement based on changes in the responsibilities of all parties in the arrangement. For collaboration arrangements within the scope of ASC 808 that 
contain multiple elements, the Company first determines which elements of the collaboration are deemed to be within the scope of ASC 808 and those that 
are more reflective of a vendor-customer relationship and therefore within the scope of ASC 606. For elements of collaboration arrangements that are 
accounted for pursuant to ASC 808, an appropriate recognition method is determined and applied consistently, generally by analogy to ASC 606. For those 
elements of the arrangement that are accounted for pursuant to ASC 606, the Company applies the five-step model described above.

Costs Associated with License and Collaborative Arrangements

All costs associated with license and collaborative arrangements are expensed as incurred and recorded in research and development expense in the 
consolidated statements of operations.

Research and Development Costs 

Research and development costs are expensed as incurred. Research and development expenses include salaries, equity-based compensation and benefits of 
employees, third-party license fees and other operational costs related to the Company’s research and development activities, including allocated facility-
related expenses and external costs of outside vendors engaged to conduct both preclinical studies and clinical trials. Non-refundable pre-payments for 
goods or services that will be used or rendered for future research and development activities are deferred and capitalized. Such amounts are recognized as 
expense as the goods or services are delivered or the related services are performed, or until it is no longer expected that the goods will be delivered or the 
services rendered. 

The Company may in-license the rights to develop and commercialize product candidates. For each in-license transaction the Company evaluates whether 
it has acquired processes or activities along with inputs that would be sufficient to constitute a “business” as defined under GAAP. A “business” as defined 
under GAAP consists of inputs and processes applied to those inputs that have the ability to create outputs. Although businesses usually have outputs, 
outputs are not required for an integrated set of activities to qualify as a business. When the Company determines that it has not acquired sufficient 
processes or activities to constitute a business, any up-front payments, as well as milestone payments, are immediately expensed as acquired research and 
development in the period in which they are incurred.

Research Contract Costs and Accruals 

The Company has entered into various research and development contracts with research institutions and other companies. These agreements are generally 
cancelable, and related payments are recorded as research and development expenses as incurred. The Company records accruals for estimated ongoing 
research costs. When evaluating the adequacy of the accrued liabilities, the Company analyzes progress of the studies, including the phase or completion of 
events, invoices received and contracted costs. Significant judgments and estimates are made in determining the accrued balances at the end of any 
reporting period. Actual results could differ from the Company’s estimates. The Company’s historical accrual estimates have not been materially different 
from the actual costs. 

Patent Costs 

All patent-related costs incurred for filing and prosecuting patent applications are expensed as incurred due to the uncertainty about the recovery of the 
expenditure. Amounts incurred are classified as general and administrative expenses. 

F-13

 
Equity-Based Compensation 

The Company measures all stock options and other stock-based awards granted to employees, directors and non-employees based on the fair value on the 
date of the grant and recognizes compensation expense of those awards, over the requisite service period, which is generally the vesting period of the 
respective award. Forfeitures are accounted for as they occur. The Company applies the straight-line method of expense recognition to all awards with only 
service-based vesting conditions. The Company has not issued any awards with performance-based vesting conditions. 

The fair value of each stock option grant is estimated on the date of grant using the Black-Scholes option-pricing model. The Company historically has 
been a private company and lacks company-specific historical and implied volatility information. Therefore, it estimates its expected stock volatility based 
on the historical volatility of a publicly traded set of peer companies and expects to continue to do so until such time as it has adequate historical data 
regarding the volatility of its own traded stock price. For options with service-based vesting conditions, the expected term of the Company’s stock options 
has been determined utilizing the “simplified” method for awards that qualify as “plain-vanilla” options. Through December 31, 2018, the expected term of 
stock options granted to non-employees is equal to the contractual term of the option award and effective January 1, 2019, the “simplified” method is used. 
The risk-free interest rate is determined by reference to the U.S. Treasury yield curve in effect at the time of grant of the award for time periods 
approximately equal to the expected term of the award. Expected dividend yield is based on the fact that the Company has never paid cash dividends and 
does not expect to pay any cash dividends in the foreseeable future. 

The fair value for restricted stock units (“RSU”) was calculated using the closing price of the Company’s common stock on the date of grant.

The Company classifies stock-based compensation expense in its consolidated statement of operations in the same manner in which the award recipient’s 
payroll costs are classified or in which the award recipient’s service payments are classified.

Income Taxes 

Income taxes are accounted for under the asset and liability method. Under the asset and liability method, deferred tax assets and liabilities are recognized 
for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their 
respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those 
temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in 
income in the period that includes the enactment date. The Company records valuation allowances to reduce deferred income tax assets to the amount that 
is more likely than not to be realized. The Company determines whether it is more likely than not that a tax position will be sustained upon examination. If 
it is not more likely than not that a position will be sustained, no amount of benefit attributable to the position is recognized. The tax benefit to be 
recognized of any tax position that meets the more likely than not recognition threshold is calculated as the largest amount that is more than 50% likely of 
being realized upon resolution of the contingency.   

Prior to January 25, 2018, the Company had not been subject to U.S. federal income taxes as the Company was organized as a limited liability company. As 
such, the taxable income or loss was passed through to and included in the tax returns of the members. Since January 25, 2018, the Company’s income has 
since been subject to U.S. federal, state, local, and foreign income taxes and taxed at the prevailing corporate tax rates. 

Segment Data 

The Company currently manages its operations as a single segment for the purposes of assessing performance and making operating decisions. All of the 
Company’s tangible assets are held in the United States. 

Comprehensive Loss 

Comprehensive loss includes net loss, as well as other changes in stockholders’ equity that result from transactions and economic events other than those 
with members. The Company’s only element of other comprehensive income (loss) in all periods presented was unrealized gains (losses) from available-
for-sale securities. 

Net Loss per Share

The Company follows the two-class method when computing net loss per share, as the Company has issued shares that meet the definition of participating 
securities. The two-class method determines net 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 available to common stockholders for the period to 
be allocated between common and 

F-14

 
participating securities based upon their respective rights to receive dividends as if all income for the period had been distributed. 

Basic net loss per share is computed by dividing the net loss by the weighted average number of shares of common stock and pre-funded warrants 
outstanding for the period. Diluted net loss is computed by adjusting net loss to reallocate undistributed earnings based on the potential impact of dilutive 
securities. Diluted net loss per share is computed by dividing the diluted net loss by the weighted average number of shares of common stock and pre-
funded warrants outstanding for the period, including potential dilutive shares of common stock assuming the dilutive effect of common stock equivalents. 

The Company’s preferred stock could entitle the holders of such shares to participate in dividends and not require the holders of such shares to participate 
in losses of the Company. Accordingly, in periods in which the Company reports a net loss, such losses are not allocated to such participating securities. In 
periods in which the Company reports a net loss, diluted net loss per share is the same as basic net loss per share, since dilutive shares of common stock are 
not assumed to have been issued if their effect is anti-dilutive. As of the year ended December 31, 2022 and 2021, there were no preferred stock issued or 
outstanding with any contractual rights. 

Contingencies 

Loss contingency provisions are recorded if the potential loss from any claim, asserted or unasserted, or legal proceeding, is considered probable and the 
amount can be reasonably estimated, or a range of loss can be determined. These accruals represent the Company’s best estimate of probable loss. 
Disclosure also is provided when it is reasonably possible that a loss will be incurred or when it is reasonably possible that the amount of a loss will exceed 
the recorded provision. The Company reviews the status of each significant matter and assesses its potential financial exposure. Significant judgment is 
required in both the determination of probability and the determination as to whether an exposure is reasonably estimable. Because of uncertainties related 
to these matters, accruals are based only on the best information available at the time. As additional information becomes available, the Company 
reassesses the potential liability related to pending claims and may change its estimates. These changes in the estimates of the potential liabilities could 
have a material impact on the Company’s consolidated results of operations and financial position. 

Business Combinations

The Company's consolidated financial statements include the operations of acquired businesses after the completion of the acquisitions. The Company 
accounts for acquired businesses using the acquisition method of accounting. Application of this method of accounting requires that (i) identifiable assets 
acquired (including identifiable intangible assets) and liabilities assumed be measured and recognized at fair value as of the acquisition date, and (ii) the 
excess of the purchase price over the net fair value of identifiable assets acquired and liabilities assumed be recorded as goodwill. Acquired in-process 
research and development (“IPR&D”) is recognized at fair value and initially characterized as an indefinite-lived intangible asset, irrespective of whether 
the acquired IPR&D has an alternative future use. Transaction costs are expensed as incurred. Amounts assigned to goodwill and other identifiable 
intangible assets are based on independent appraisals or internal estimates. 

Related Party

In October 2020, the Company entered into a collaboration and license agreement (the “Collaboration Agreement”) with Ultragenyx Pharmaceutical Inc. 
(“Ultragenyx”). In connection with the Collaboration Agreement, Ultragenyx also purchased 521,719 shares of the Company’s common stock, which 
resulted in Ultragenyx becoming a related party of the Company.

In November 2020, the Company entered into a consulting agreement with Danforth Advisors, LLC (“Danforth”), an affiliate of Stephen DiPalma, who 
previously served as the Company’s interim chief financial officer. Pursuant to the consulting agreement, Danforth provided the Company with the chief 
financial officer services of Mr. DiPalma, and other services, including financial planning, offering support and accounting services, in exchange for fees 
payable to Danforth based on hourly rates. The Company has paid Danforth approximately $1,965 as of December 31, 2022. During the years ended 
December 31, 2022 and 2021, the Company incurred cost of $1,472 and $777, respectively, related to the consulting agreement. In accordance with the 
consulting agreement, in November 2020, the Company issued to Danforth a warrant to purchase 2,000 shares of its common stock at an exercise price per 
share of $49.35. As of December 31, 2022, the warrants had vested in full. 

F-15

 
 
Recently Adopted Accounting Pronouncements 

In December 2019, the Financial Accounting Standards Board (“FASB") issued Accounting Standards Update (“ASU”) No. 2019-12, Income Taxes (Topic 
740): Simplifying the Accounting for Income Taxes, which simplifies the accounting for income taxes by removing certain exceptions to the general 
principles in ASC 740 and clarifies and amends existing guidance to improve consistent application. The standard became effective for the Company 
beginning January 1, 2021. The amendments that are related to changes in ownership of foreign equity method investments or foreign subsidiaries are to be 
applied on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. The 
amendments that are related to franchise taxes that are partially based on income are to be applied on either a retrospective basis for all periods presented or 
a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. All other 
amendments under this ASU are to be applied on a prospective basis. The Company adopted the guidance effective January 1, 2021. The adoption of this 
new standard did not have a material impact on the Company’s financial statements.

Recently Issued Accounting Pronouncements

In August 2020, the FASB issued ASU No. 2020-06, Debt, Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—
Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity, which, among other 
things, provides guidance on how to account for contracts on an entity’s own equity. This ASU simplifies the accounting for certain financial instruments 
with characteristics of liabilities and equity. Specifically, the ASU eliminated the need for the Company to assess whether a contract on the entity’s own 
equity (1) permits settlement in unregistered shares, (2) whether counterparty rights rank higher than shareholder’s rights, and (3) whether collateral is 
required. In addition, the ASU requires incremental disclosure related to contracts on the entity’s own equity and clarifies the treatment of certain financial 
instruments accounted for under this ASU on earnings per share. The ASU also simplifies the accounting for convertible instruments by removing the 
beneficial conversion feature and cash conversion feature separation models. This ASU may be applied on a full retrospective or modified retrospective 
basis. This ASU is effective for smaller reporting companies for fiscal years beginning after December 15, 2023, with early adoption permitted. The 
Company does not expect the adoption to materially impact its financial position and results of operations.

3. Collaborations

Ultragenyx Collaboration 

Collaboration Agreement 

On October 22, 2020 (the “Effective Date”), the Company entered into the Collaboration Agreement with Ultragenyx to focus on the development and 
commercialization of new gene therapies for Duchenne.  The Company granted Ultragenyx an exclusive worldwide license for any pharmaceutical product 
that expresses the Company’s proprietary microdystrophin construct from AAV8 and variants thereof in clade E for the treatment of Duchenne and other 
diseases resulting from the lack of functional dystrophin (the “Licensed Products”).  The Company retains exclusive rights to all other uses of its 
microdystrophin proteins, including under its SGT-001 and SGT-003 programs.

The Company has conducted certain research and development activities with respect to the development of the Licensed Products, and concluded such 
activities as were contemplated under the Collaboration Agreement during the second quarter of 2022, resulting in the recognition of the remaining 
deferred revenue recorded at the time the Collaboration Agreement was executed, related to the upfront payment received from Ultragenyx. The Company 
may conduct additional research and development activities in collaboration with Ultragenyx from time to time in the future. Ultragenyx reimbursed the 
Company for personnel and out-of-pocket costs that the Company incurred in conducting such activities.

In addition, Ultragenyx granted to the Company an exclusive Development Option or Income Share Option (each as defined and described below) 
exercisable in the Company’s sole discretion one time per Licensed Product. After the date of first achievement of clinical proof of concept, Ultragenyx 
will provide to the Company a data package with respect to the relevant Licensed Product. The Company will use the data package to determine whether to 
exercise the corresponding Development Option or Income Share Option with respect to such Licensed Product.

With respect to each Licensed Product for which the Company has not exercised the Development Option or Income Share Option the Company will be 
entitled to milestone payments of up to $25,000 in the aggregate for each such Licensed Product that achieves specified development milestones and 
$65,000 in the aggregate for each such Licensed Product that achieves specified regulatory milestones. With respect to each Licensed Product for which the 
Company has not exercised the Income Share Option, the Company will also be entitled to milestone payments of up to $165,000 in the aggregate for each 
Licensed Product that achieves specified annual worldwide net sales milestones. For Licensed Products for which the Company has not 

F-16

 
 
exercised the Development Option or Income Share Option, Ultragenyx will pay the Company tiered royalties on a Licensed Product-by-Licensed Product 
and country-by-country basis ranging from a low double-digit percentage to a mid-teens percentage based on Ultragenyx’s annual worldwide net sales of 
such Licensed Products.

For each Licensed Product for which Ultragenyx decides to initiate a registrational trial in humans, the Company will have the option to fund 30% of the 
development costs in the United States and European Union for such Licensed Product and forgo the development and regulatory milestones (the 
“Development Option”) and receive tiered royalties on a Licensed Product-by-Licensed Product and country-by-country basis ranging from a mid-teens 
percentage to a low twenties percentage based on Ultragenyx’s annual worldwide net sales of each such Licensed Product.

For each Licensed Product for which the Company exercises the Development Option, the Company may also elect to share 30% of the net income and net 
losses on net sales of such Licensed Product in the United States and European Union (the “Income Share Option”). For Licensed Products for which the 
Company has exercised the Income Share Option, the Company will not be entitled to milestone payments and Ultragenyx will pay the Company tiered 
royalties on a Licensed Product-by-Licensed Product and country-by-country basis ranging from a mid-teens percentage to a low twenties percentage based 
on Ultragenyx’s annual net sales of each such Licensed Product outside of the United States and European Union. 

The Company may only exercise an Income Share Option if neither the Company nor any of its affiliates is then developing or commercializing a product 
that is competitive with the Licensed Product that is subject to such option. If the Company or any of its affiliates subsequently develops or commercializes 
a product that is competitive with a Licensed Product for which the Company has exercised an Income Share Option, then the Company and Ultragenyx 
will no longer share the net income and net losses on net sales of such Licensed Product and such Licensed Product will be treated as if the Company had 
exercised the Development Option with respect to such Licensed Product.

Following the Company’s exercise of the Development Option or Income Share Option with respect to a Licensed Product, the Company also has the right 
to cease participation in the sharing of development costs and sharing in net income and net losses on net sales, as applicable, for such Licensed Product by 
written notice to Ultragenyx. Upon such notice, the Company will no longer share in the development costs and net income and net losses on net sales of 
such Licensed Product, as applicable, and will be eligible to receive payments on milestones achieved after the opt-out for such Licensed Product and 
royalties at the rates applicable to Licensed Products for which the Company has not exercised the Development Option or Income Share Option, as 
described above.

The Collaboration Agreement continues on a country-by-country and Licensed Product-by-Licensed Product basis until the expiration of all payment 
obligations under the agreement. With respect to any Licensed Product for which the Company has exercised an Income Share Option, the Collaboration 
Agreement continues until there are no longer sales of such Licensed Product in the United States or Europe. Either party has the right to terminate the 
agreement if the other party has materially breached in the performance of its obligations under the agreement and such breach has not been cured within 
the applicable cure period. Ultragenyx may also terminate the Collaboration Agreement in its sole discretion upon 90 days’ prior written notice to the 
Company.

Stock Purchase Agreement

In connection with the execution of the Collaboration Agreement, Ultragenyx and the Company also entered into a stock purchase agreement (the “Stock 
Purchase Agreement”) on the Effective Date, pursuant to which the Company issued and sold 521,719 shares of its common stock (the “Shares”) to 
Ultragenyx at a price of $76.6695 per share for an aggregate purchase price of approximately $40,000. The Stock Purchase Agreement contains customary 
representations, warranties and covenants of each of the parties thereto. Following the sale of the Shares, Ultragenyx beneficially owned approximately 
14.45% of the Company’s outstanding common stock. As of December 31, 2022, Ultragenyx beneficially owned approximately 2.7% of the Company’s 
outstanding common stock.

Investor Agreement 

In connection with the consummation of the transactions contemplated by the Stock Purchase Agreement, the Company and Ultragenyx entered into an 
Investor Agreement (the “Investor Agreement”) on the Effective Date. Pursuant to the terms of the Investor Agreement, Ultragenyx agreed that, so long as 
it holds at least 10% of the Company’s outstanding common stock, the Shares will be subject to a voting agreement, such that until the earliest to occur of 
certain specified events, and subject to specified conditions, Ultragenyx will, and will cause its permitted transferees to, vote in accordance with the 
recommendation of the Company’s Board of Directors with respect to specified matters.

Accounting Treatment

The Company concluded that the Collaboration Agreement and the Stock Purchase Agreement should be combined and treated as a single arrangement for 
accounting purposes as the agreements were entered into contemporaneously and in contemplation of one another.

F-17

 
The Company assessed this arrangement in accordance with ASC 606 and concluded that the contract counterparty, Ultragenyx, is a customer. The 
Company identified the following promises in the Collaboration Agreement that were evaluated under the scope of ASC 606: (1) an exclusive worldwide 
license to the Licensed Products; (2) an obligation to perform research and development services; and (3) an obligation to participate in a joint steering 
committee. The Company assessed the promised goods and services to determine if they are distinct. Based on this assessment, the Company determined 
that Ultragenyx cannot benefit from the promised goods and services separately from the others as they are highly interrelated and therefore not distinct. 
Due to the early stage of the Licensed Products, the research and development services could not be performed by another party. The Company’s skill-set, 
knowledge and expertise are required to conduct the research and development services and the research and development services are expected to involve 
significant further development of the Licensed Products. Accordingly, the promised goods and services represent one combined performance obligation 
and the entire transaction price will be allocated to that single combined performance obligation.

The Company determined the transaction price under ASC 606 at the inception of the Collaboration Agreement to be $22,513, which represents the excess 
proceeds from the equity investment under the Stock Purchase Agreement, when measured at fair value after taking into consideration a discount for lack 
of marketability, plus the estimated reimbursement of research and development costs, which represents variable consideration. The Company included the 
estimated reimbursement of research and development costs in the transaction price at the inception of the arrangement because the Company is required to 
perform research and development services and the contract requires Ultragenyx to reimburse the Company for costs incurred. Also, since the related 
revenue would be recognized only as the costs are incurred, the Company determined it is not probable that a significant reversal of cumulative revenue 
would occur. The Company evaluated how much variable consideration related to development and regulatory milestones, and the Company’s potential 
exercise of its Development Option or Income Share Option per Licensed Product, to include in the transaction price using the most likely amount 
approach and concluded that no amount should be included in the transaction price due to the high degree of uncertainty and risk associated with these 
potential payments. The Company also determined that royalties and sales milestones relate solely to the license of intellectual property and are therefore 
excluded from the transaction price under the sales- or usage-based royalty exception of ASC 606. Revenue related to these royalties and sales milestones 
will only be recognized when the associated sales occur, and relevant thresholds are met.

The Company determined that revenue under the Collaboration Agreement should be recognized over time as Ultragenyx simultaneously receives the 
benefit from the Company as the Company performs under the single performance obligation over time. The Company will recognize revenue for the 
single performance obligation using a cost-to-cost input method as the Company has concluded it best depicts the research and development and joint 
steering committee participation services performed. Under this method, the transaction price is recognized over the contract’s entire performance period, 
using costs incurred relative to total estimated costs to determine the extent of progress towards completion.

Ultragenyx is a related party because Ultragenyx was one of the Company’s significant stockholders as of December 31, 2021 and continued to be a 
stockholder as of December 31, 2022. $8,080 and $13,620 has been recognized as related party revenue as the Company has performed services under the 
Collaboration Agreement for the year ended December 31, 2022 and December 31, 2021, respectively. Further, the Company has made no payments to 
Ultragenyx during the years ended December 31, 2022 and 2021. There is $0 and $110 due from Ultragenyx as of December 31, 2022 and December 31, 
2021, respectively. The amount received is deferred as a contract liability on the Company’s consolidated balance sheet as the performance obligation has 
been fully satisfied as of December 31, 2022.

The following table presents changes in the balances of the Company’s related party collaboration receivables and contract liabilities during the year ended 
December 31, 2022 and December 31, 2021, respectively:

Related party collaboration 
receivables
Contract liabilities:
Deferred revenue

Related party collaboration 
receivables
Contract liabilities:
Deferred revenue

Balance as of 

Balance as of 

December 31, 2021    

Additions

Deductions

December 31, 2022  

$

110  

$

14  

$

(124 )

$

8,080    

—    

(8,080 )  

—  

—  

Balance as of 

December 31, 2020    

Additions

Deductions

Balance as of 

December 31, 2021  

$

—  

$

982  

$

(872 )

$

20,718    

982    

(13,620 )  

110  

8,080  

F-18

 
 
 
 
   
   
 
 
 
 
 
 
   
 
   
 
   
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
   
 
   
 
   
 
 
 
 
 
 
 
 
The changes in the related party collaboration receivables balance during the year ended December 31, 2022 are the result of amounts owed to the 
Company for research and development services provided, offset by the collections received from Ultragenyx.

As of December 31, 2022 and December 31, 2021, there was $0 and $8,080, respectively, of deferred revenue related to the Collaboration Agreement, 
which is classified as either current or non-current in the accompanying consolidated balance sheet based on the period the services are expected to be 
delivered. Additionally, as of December 31, 2022 and December 31, 2021, there was $0 and $110, respectively, of related party collaboration receivables 
related to reimbursable costs expected to be received from Ultragenyx for research and development services performed.

Costs incurred relating to the Collaboration Agreement consist of internal and external research and development costs, which primarily include salaries 
and benefits, lab supplies, preclinical research studies, clinical studies, consulting services, and commercial development. These costs are included in 
research and development expenses in the Company’s consolidated statement of operations during the years ended December 31, 2022 and 2021.

4. Acquisition

On September 29, 2022, the Company entered into an Agreement and Plan of Merger with AavantiBio. The Acquisition closed on December 2, 2022 and 
was announced on December 5, 2022. This acquisition allows the Company to add to its pipeline of assets. The Company acquired AavantiBio for a total 
purchase price of $9,169, including (i) $1 in cash and (ii) 1,354,258 shares of its common stock, par value $0.001 per share with a fair value of $9,168 to 
AavantiBio equityholders. The price per share of the Company’s common stock used in the calculation of the purchase price is based on the closing price of 
Solid’s common stock on the Nasdaq Global Select Market on December 2, 2022, which was $6.77.

The Acquisition was accounted for as a business combination in which the Company, as the accounting acquirer, recorded the assets acquired and liabilities 
assumed from AavantiBio at their fair values as of the acquisition date. The Company recognized a gain on the purchase of AavantiBio of $18,236 as the 
net assets acquired of $27,405 were greater than the purchase price of $9,169. Prior to recognizing the gain, the Company reassessed the measurement and 
recognition of identifiable assets acquired, and liabilities assumed and concluded that the valuation procedures and resulting measures were appropriate, in 
all material respects. The Company believes that its ability to negotiate a purchase price lower than the fair market value of the acquired net assets was due 
to a combination of factors, including the then prevailing market conditions and the uncertain future macroeconomic environment. The Company believes 
the seller, as a smaller, less well capitalized company, was motivated to complete the transaction under the terms described above as growing economic 
uncertainty and a rising interest rate environment negatively impacted their ability to raise additional capital. 

The Company incurred acquisition related costs of $4,870, which are included in general and administrative expenses in the Company’s consolidated 
statements of comprehensive loss for the fiscal year ended December 31, 2022.

The fair value is determined utilizing the fair value hierarchy as described in Note 2, Summary of Significant Accounting Policies, and Note 5, Fair Value of 
Financial Assets and Liabilities. 

The following table summarizes the fair values of the assets acquired and liabilities assumed from AavantiBio at the acquisition date.  

December 2, 2022

Assets
Current assets:

Cash and cash equivalents
Prepaid expenses and other current assets

Total current assets

Operating lease, right-of-use asset
Property and equipment
Other non-current assets

Total assets

Liabilities
Current liabilities:

Accounts payable
Accrued expenses
Operating lease liabilities
Total current liabilities

Operating lease liabilities, excluding current portion

Total liabilities
Net assets acquired
Total consideration paid
Gain on acquisition of business

$

$

$

$

F-19

31,524  
403  
31,927  
1,027  
2,765  
23  
35,742  

3,575  
3,634  
778  
7,987  
350  
8,337  
27,405  
9,169  
18,236  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
For the period from December 3, 2022 to December 31, 2022, AavantiBio's revenue and net loss before taxes included within the consolidated statement of 
operations subsequent to the closing of the acquisition was $0 and $6,041, respectively.

The following selected unaudited pro forma consolidated results of operations are presented as if the AavantiBio acquisition had occurred as of the 
beginning of the period immediately preceding the period of acquisition, which is January 1, 2021, after giving effect to certain adjustments. For fiscal year 
2022, these adjustments included gain on the purchase of AavantiBio of $18,236 and one time transaction costs of $4,870 being removed. For fiscal year 
2021, these adjustments included gain on the purchase of AavantiBio and one time transaction costs. 

Revenues
Net income

$  
$  

8,094    
(140,825 )  

$  
$  

13,620  
(95,417 )

2022

2021

Year Ended December 31,

5. Fair Value of Financial Assets and Liabilities 

The following tables present information about the Company’s assets and liabilities that are measured at fair value on a recurring basis and indicate the 
level of the fair value hierarchy utilized to determine such fair values: 

Assets:

Cash equivalents
Available-for-sale securities

Assets:

Cash equivalents
Available-for-sale securities

Fair Value Measurements as of December 31, 2022:

Level 1

Level 2

Level 3

Total

—     $
—      
—     $

69,374     $
58,338      
127,712     $

—     $
—      
—     $

69,374  
58,338  
127,712  

Fair Value Measurements as of December 31, 2021:

Level 1

Level 2

Level 3

Total

—     $
—      
—     $

75,224     $
88,643      
163,867     $

—     $
—      
—     $

75,224  
88,643  
163,867  

  $

  $

  $

  $

As of December 31, 2022 and December 31, 2021 the fair values of the Company’s cash equivalents and available-for-sale securities were determined 
using Level 2 inputs. During the year ended December 31, 2022 and December 31, 2021, there were no transfers between Level 1, Level 2 and Level 3, 
respectively. 

The fair value of the Company’s cash, restricted cash, accounts payable, accrued expenses and other current liabilities approximate their carrying value due 
to their short-term maturities. 

6. Available-for-Sale Securities 

As of December 31, 2022, the fair value of available-for-sale debt securities by type of security was as follows:   

Investments:

Treasury bills
Corporate bond securities

Amortized
Cost

December 31, 2022

Gross
Unrealized
Gain

Gross
Unrealized
Loss

Fair
Value

34,780     $
23,626    
58,406  

  $

—     $
—      
  $
—  

(30 )   $
(38 )    
(68 )   $

34,750  
23,588  
58,338  

  $

  $

F-20

 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
   
   
   
 
 
     
     
     
   
 
 
 
 
 
 
 
 
 
   
   
   
 
 
     
     
     
   
 
 
 
 
 
 
 
 
   
   
   
 
 
     
     
     
   
 
 
 
 
 
As of December 31, 2021, the fair value of available-for-sale debt securities by type of security was as follows:

Investments:

Treasury bill
Corporate bond securities
Commercial paper

Amortized
Cost

December 31, 2021

Gross
Unrealized
Gain

Gross
Unrealized
Loss

Fair
Value

  $

  $

2,800     $
83,889    
1,999    
88,688  

  $

—     $
—      
—      
  $
—  

—     $
(45 )    
—      
(45 )   $

2,800  
83,844  
1,999  
88,643  

The estimated fair value and amortized cost of the Company’s available-for-sale securities by contractual maturity are summarized as follows: 

Due in one year or less

Total available-for-sale securities

Due in one year or less

Total available-for-sale securities

December 31, 2022

Amortized
Cost

Fair
Value

58,406     $
58,406     $

58,338  
58,338  

December 31, 2021

Amortized
Cost

Fair
Value

88,688     $
88,688     $

88,643  
88,643  

  $
  $

  $
  $

The average maturity of the Company’s available-for-sale securities as of December 31, 2022 and December 31, 2021 was approximately 0.5 years and 0.7 
years, respectively.

7. Prepaid Expenses and Other Current Assets 

Prepaid expenses and other current assets consist of the following: 

Prepaid research and development expenses
Prepaid expenses and other assets

8. Property and Equipment 

Property and equipment consists of the following: 

Furniture and fixtures
Laboratory equipment
Leasehold improvements
Computer equipment
Computer software
Construction in process

Less accumulated depreciation

December 31,

2022

2021

2,913     $
3,003      
5,916     $

6,015  
8,708  
14,723  

December 31,

2022

2021

868     $
16,416      
384      
677      
553      
1,715      
20,613      
10,956      
9,657     $

212  
10,719  
4,713  
436  
553  
1,490  
18,123  
11,661  
6,462  

  $

  $

  $

  $

Depreciation expense was $2,408, $2,964 and $3,922 for the years ended December 31, 2022, 2021 and 2020, respectively. 

F-21

 
 
 
 
 
 
   
   
   
 
 
     
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
   
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
9. Accrued Expenses

Accrued expenses and other current liabilities consist of the following: 

Accrued research and development
Accrued compensation
Accrued other

December 31,

2022

2021

  $

  $

3,033     $
8,370      
5,288      
16,691     $

1,507  
3,084  
4,937  
9,528  

10. Equity-Based Compensation 

Equity Incentive Plans

In connection with the closing of the Company’s initial public offering, the Company's Board of Directors and stockholders approved the 2018 Omnibus 
Incentive Plan (the “2018 Plan”), which provides for the reservation of 333,400 shares of common stock for equity awards. On June 16, 2020, the 
Company’s stockholders approved the 2020 Equity Incentive Plan (as amended or restated, the “2020 Plan”) which consisted of, at the time of approval, (i) 
200,000 shares of common stock and (ii) additional shares of common stock (up to 325,268) as is equal to (i) the number of shares reserved under the 2018 
Plan that remain available for grant under the 2018 Plan as of immediately prior to the date the 2020 Plan was approved by the Company’s stockholders 
and (ii) the number of shares subject to awards granted under the 2018 Plan which awards expire, terminate or are otherwise surrendered, cancelled, 
forfeited or repurchased by the Company at their original issuance price pursuant to a contractual repurchase right.

F-22

 
 
 
 
 
 
   
 
   
   
  
 
As of the effective date of the 2020 Plan, no further awards will be made under the 2018 Plan. Any options or awards outstanding under the 2018 Plan 
remain outstanding and effective and are governed by their existing terms.

On June 16, 2021, the Company’s stockholders approved an amendment to the 2020 Plan to reserve an additional 466,666 shares of common stock for 
issuance under the plan. 

On December 1, 2022, the Company’s stockholders approved an amendment and restatement of the 2020 Plan to (i) increase the number of shares of 
common stock reserved for issuance under the plan by 866,666 shares to 1,533,333 shares, subject to adjustment in the event of stock splits and other 
similar events, (ii) provide for an annual increase, to be added on the first day of each fiscal year during the term of the plan, beginning with the fiscal year 
ending December 31, 2023, of 5% of the number of shares of common stock outstanding on the first day of such fiscal year or a lesser number of shares 
determined by the Company’s Board of Directors, (iii) provide that up to 1,858,601 shares of common stock may be granted as “incentive stock options” 
under the plan, (iv) extend the term of the plan to December 1, 2032 and (v) revise certain provisions of the plan relating to the Company’s Board of 
Directors’ ability to delegate authority to make awards under the plan. 

At December 31, 2022, 1,049,472 shares remained available for future issuance under the 2020 Plan. Under the 2020 Plan, stock options may not be 
granted at less than fair value on the date of grant.

2021 Employee Stock Purchase Plan 

The 2021 Employee Stock Purchase Plan (the “2021 ESPP”) was adopted by the Company's Board of Directors on April 14, 2021, approved by the 
stockholders on June 16, 2021, and became effective on June 16, 2021. The first offering period under the ESPP commenced on September 1, 2021. The 
number of shares of the Company’s common stock reserved for issuance under the 2021 ESPP is 73,525 shares. At December 31, 2022, 41,417 shares 
remained available for future issuance under the 2021 ESPP.

Stock Options

The following table summarizes the Company’s stock option activity for the year ended December 31, 2022:

Outstanding at December 31, 2021

Granted
Exercised
Expired
Forfeitures

Outstanding at December 31, 2022

Vested and expected to vest as of December 31, 2022

Exercisable at December 31, 2022

Number of
Options

400,842     $

1,189,663    
—    
(36,531 )  
(120,006 )  
1,433,968    
1,433,968     $
195,104     $

Weighted
Average
Exercise
Price

Remainin
g 
Contract
ual Life 
(in years)  
8.49  

138.45      
8.63    
—    
203.11    
53.16    
36.22      
36.22      
163.79      

8.88  

8.88  

7.00  

At December 31, 2022, the Company had an aggregate of $12,708 of unrecognized equity-based compensation cost related to stock options outstanding 
which is expected to be recognized over a weighted average period of 3.19 years. The intrinsic value of stock options outstanding as of December 31, 2022 
and 2021 was $0. The intrinsic value of stock options exercisable as of December 31, 2022 was $0. No stock options were exercised during the year ended 
December 31, 2022.  

The fair value of each option award is estimated on the date of grant using the Black-Scholes option-pricing model using the assumptions noted in the 
following table for the years ended December 31:

2022

2021

2020

Expected volatility

Expected dividends
Expected term (in years)
Risk-free rate

118.5 - 130.3%   115.5% - 123.9%   21.3% - 119.5%
0.0%
4.50 - 10.00
0.6% - 3.4%

0.0%  
5.1 - 6.25  
0.4% - 1.4%  

0.0%  
5.31-6.25  
1.4 - 3.9%  

The weighted average fair value of options to purchase shares of common stock granted during the year ended December 31, 2022 and 2021 was $7.59 and 
$75.75, respectively.

F-23

 
 
 
 
   
   
   
   
 
   
   
 
   
   
 
   
   
 
   
   
 
   
   
 
   
   
   
 
 
 
 
 
 
 
 
Restricted Stock Units

In 2022, 2021 and 2020, the Company's Board of Directors issued restricted stock units to employees. Restricted stock unit grants typically vest over one or 
two years. 

The following table summarizes the Company’s restricted stock unit activity for the year ended December 31, 2022:

Unvested at December 31, 2021

Granted
Vested
Forfeitures

Outstanding at December 31, 2022

Unvested as of December 31, 2022

Weighted-
Average
Grant Date
Fair Value

41.29  
8.93  
35.45  
19.45  
8.39  

8.39  

Units

33,980     $

556,179    
(35,149 )  
(42,453 )  
512,557     $
512,557     $

At December 31, 2022, the Company had an aggregate of $3,800 of unrecognized equity-based compensation cost related to restricted stock units 
outstanding. The unrecognized expense for the restricted stock units is expected to be recognized over a weighted average period of 3.5 years. 

Restricted Common Stock 

In connection with the Company’s Corporate Conversion on January 25, 2018, all restricted Series B and D common units were converted to restricted 
shares of common stock. As of December 31, 2021, there were no remaining restricted shares.

The aggregate intrinsic value of restricted common units that vested during the years ended December 31, 2022, 2021, and 2020 were $0, $199, and $522, 
respectively.

At December 31, 2022, the Company had an aggregate of $0 of unrecognized equity-based compensation related restricted shares of common stock.

The Company recorded equity-based compensation expense related to all of its share-based awards to employees and non-employees in the following 
captions within its consolidated statements of operations for the years ended December 31, 2022, 2021, and 2020:

Research and development expenses
General and administrative expenses
Restructuring expenses

11. Leases 

For the Year Ended December 31,
2021

2020

2022

  $

  $

2,756     $
4,781    
—    
7,537     $

6,289     $
7,084      
—      
13,373     $

5,822  
4,956  
851  
11,629  

The Company has operating leases for laboratory and office space in Massachusetts, North Carolina and Florida.

In January 2019, the Company executed a lease agreement for additional office space in Cambridge, Massachusetts. The space serves as office space 
supporting the Company’s lab operations and consists of approximately 5,000 square feet. The term of the lease runs through October 2025. In June 2021, 
the Company determined that it no longer needed a floor of office space that it was renting and terminated its lease with another landlord. As a result of the 
termination, the Company wrote off $1,314 and $1,233 of the remaining lease liability and right-of-use asset, respectively, associated with the lease during 
the year ended December 31, 2021.

F-24

 
 
 
   
 
   
   
 
   
 
   
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
 
 
  
 
 
In June 2021, the Company entered into a lease with Hood Park LLC (“Landlord”), pursuant to which the Company leases approximately 49,869 square 
feet of office, laboratory, research and development and manufacturing space located in Charlestown, Massachusetts (“Premises”). The Company relocated 
its corporate headquarters to the Premises in June 2022. The initial term of the lease commenced in June 2022 when the construction of the lessor assets 
was substantially completed and continues for a ten-year period, unless earlier terminated. The lease provides the Company with an option to extend the 
lease for an additional five-year term. The Company and the Landlord were each obligated to undertake certain improvements prior to the commencement 
of the lease, and significant improvements were completed as of June 2022. The monthly lease payment is approximately $305 with annual escalation of 
approximately 3%. The lease includes a $10,223 construction allowance which is considered a lease incentive and included within the right-of-use asset. 
The Company was required to post a customary letter of credit in the amount of $1,833, subject to decrease on a set schedule, as a security deposit pursuant 
to the lease.

During the year ended December 31, 2022, the Company recorded a failed sales-leaseback transaction related to certain lab equipment. The related 
financing liabilities are recorded on the Company's consolidated balance sheets within financing labilities. In connection with this transaction, the Company 
also recorded a cash inflow within the financing activities under proceeds from financing liabilities of $2,143.

As of December 31, 2022, minimum future lease payments for these operating and finance leases were as follows:

2023
2024
2025
2026
Thereafter
Total
Less: Imputed Interest
Total Lease Liabilities

Finance Leases

  Operating Leases

1,109     $
810    
651    
—    
—    
2,570    
199    
2,371     $

4,574  
4,195  
4,092  
4,118  
25,721  
42,700  
16,524  
26,176  

  $

  $

The Company recorded rent expense of $3,881, $2,568 and $2,562 for the years ended December 31, 2022, 2021, and 2020, respectively.

Short-term lease and variable lease costs were not material for the year ended December 31, 2022 and 2021.

The supplemental disclosure of cash flow information related to the Company’s leases and the weighted average remaining lease term and weighted 
average discount rate of the Company’s leases are as follows:

For the Year Ended 
December 31,
2022

For the Year 
Ended 
December 31,
2021

For the Year 
Ended 
December 31,
2020

Other information
Cash paid for amounts included in the measurement of lease liabilities
Operating lease liabilities arising from obtaining right-of-use-assets
Finance lease liabilities arising from obtaining right-of-use assets
Weighted-average remaining lease term (in years)
Operating lease
Finance lease
Weighted-average discount rate
Operating lease
Finance lease

  $
  $
  $

2,840   $
29,126   $
—   $

9.3    
2.5    

10.6 % 
21.3 % 

2,408   $
310   $
—   $

1.0    
2.3    

11.9 % 
10.7 % 

2,408  
1,629  
—  

2.8  
2.3  

12.6 %
10.7 %

F-25

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
 
   
   
   
   
   
 
   
   
   
   
   
 
12. Commitments and Contingencies 

Letter of Credit 

The Company had outstanding letters of credit in the amounts of $1,833 and $2,070 at December 31, 2022 and 2021, respectively, which were required as a 
condition of the Company’s office and laboratory leases. 

Indemnification Agreements 

In the ordinary course of business, the Company may provide indemnification of varying scope and terms to vendors, lessors, business partners and other 
parties with respect to certain matters, including, but not limited to, losses arising out of breach of such agreements or from intellectual property 
infringement claims made by third parties. In addition, the Company has entered into indemnification agreements with its executive officers and members 
of its Board of Directors that require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status 
or service as executive officers or directors. The maximum potential amount of future payments the Company could be required to make under these 
indemnification agreements is, in many cases, unlimited. To date, the Company has not incurred any material costs as a result of such indemnification 
arrangements. 

The Company does not believe that the outcome of any claims under indemnification arrangements will have a material effect on its financial position, 
results of operations or cash flows, and it has not accrued any liabilities related to such obligations in its consolidated financial statements as of December 
31, 2022 and 2021. 

Legal Proceedings 

The Company may periodically become subject to legal proceedings and claims arising in connection with ongoing business activities, including claims or 
disputes related to patents that have been issued or that are pending in the field of research on which the Company is focused. The Company is not aware of 
any material legal proceedings or claims as of December 31, 2022. 

13. License Agreements 

University of Washington License Agreement 

In 2015, the Company entered into a license agreement with the University of Washington, acting through UW CoMotion, under which the Company 
obtained an exclusive, royalty-bearing, sublicensable, worldwide license under a patent application owned by the University of Washington relating to 
novel micro-dystrophins and all patents claiming priority to such patent to develop, manufacture, and commercialize products for use in the treatment of 
Duchenne and related disease indications caused by a lack of functional dystrophin. The Company has the right to grant sublicenses to third parties 
contingent upon written approval by the University of Washington prior to executing such sublicense, which approval may not be unreasonably withheld. 

In consideration for the rights granted by the agreement, the Company paid a one-time, non-refundable license fee, which was recorded as a research and 
development expense in 2015. The Company is required to reimburse the University of Washington for costs incurred in applying for, prosecuting and 
maintaining patents and pay up to an aggregate of approximately $1,000 upon the achievement of certain milestones. In October 2017, the first milestone 
was achieved under this agreement. The milestone payment was recorded as a research and development expense in the fourth quarter of 2017. In October 
2020, the license agreement was amended such that the Company was required to pay the University of Washington $375 in connection with the execution 
of the Collaboration Agreement. This payment was recorded as a research and development expense in the fourth quarter of 2020. The license agreement 
was also amended such that the Company is required to pay an aggregate of approximately $3,400 upon the achievement of certain milestones. There were 
no milestones achieved during the years ended December 31, 2022, 2021, and 2020. The Company must also pay royalties of a low single digit percentage 
of future sales by the Company and its sublicensees of products developed under the licensed patent rights. In addition, the Company must pay an annual 
maintenance fee until certain milestones are achieved, at which time a minimum annual royalty requirement will replace such maintenance fee and will 
apply to the Company and its sublicensees. 

The license agreement remains in effect until the expiration of the last-to-expire patent licensed under the agreement. The Company may terminate the 
agreement at any time upon providing sixty days’ written notice to the University of Washington. The University of Washington may terminate the 
agreement upon the Company’s uncured, material breach of the agreement or if the Company enters into an insolvency-related event. 

The Company recorded research and development expense in the amount of $96, $60, and $446 for the years ended December 31, 2022, 2021, and 2020, 
respectively, under the agreement. 

F-26

 
 
The University of Missouri License Agreement 

In 2015, the Company entered into a license agreement with the Curators of the University of Missouri (the “University of Missouri”), a public corporation 
of Missouri, under which the Company obtained an exclusive, royalty-bearing, sublicensable, worldwide license under certain patent and patent 
applications owned by the University of Missouri relating to a novel synthetic microdystrophin gene to make, sell and distribute products for use in the 
treatment of Duchene and related disease indications resulting from a lack of functional dystrophin. 

In consideration for the rights granted by the agreement, the Company paid a one-time, non-refundable license fee, which was recorded as a research and 
development expense in 2015. The Company is required to reimburse the University of Missouri for costs incurred in applying for, prosecuting and 
maintaining the licensed patents and pay up to an aggregate of approximately $1,000 upon the achievement of certain milestones for each product 
developed based on the licensed patents. In October 2017, the first milestone was achieved under this agreement. The milestone payment was recorded as a 
research and development expense in the fourth quarter of 2017.   

Under the agreement, in the event the Company grants a sublicenses to another party, the Company is required to pay the University of Missouri a 
percentage of the consideration received. The license agreement was amended such that the Company was required to pay the University of Missouri $750 
in 2021 and $1,300 in 2022 as a result of the execution of the Collaboration Agreement with Ultragenyx in October 2020. These amounts were recorded as 
a research and development expense in the fourth quarter of 2020. The Company paid $750 in February 2021 and $1,300 in February 2022. The license 
agreement was also amended such that the Company is required to pay an aggregate of approximately $1,900 upon the achievement of certain milestones.

There were no milestones achieved during the years ended December 31, 2022, 2021, and 2020. The Company must pay a royalty of a low single digit 
percentage of future sales or by its sublicensees of products developed using the licensed patents. In addition, the Company must pay an annual 
maintenance fee until certain milestones are achieved, after which time a minimum annual royalty will replace such maintenance fee.

Under the agreement, the Company granted the University of Missouri a non-exclusive, royalty-free, irrevocable, paid-up license, with the right to grant 
sublicenses to non-profit, academic, educational or governmental institutions, to practice and use improvements made by the Company using the licensed 
patent rights, solely for non-commercial research purposes. 

The license agreement remains in effect until the expiration of the last-to-expire patent or the abandonment of the last to be abandoned patent application 
licensed under the agreement. The University of Missouri may terminate the agreement, or render the license granted thereunder non-exclusive, in 
individual countries if the Company’s sublicensees fail to achieve certain milestones. The Company may terminate the license agreement at any time upon 
providing six months’ written notice to the University of Missouri and paying a termination fee. Each of the University of Missouri and the Company may 
also terminate the agreement for an uncured default or breach of the agreement by the other party. The Company’s ability to cure such breach only applies 
to the first two notices of such breach provided by the University of Missouri, and thereafter, the University of Missouri may terminate the agreement for 
the Company’s default or breach of the agreement upon thirty days’ written notice without an opportunity to cure such default or breach. 

The Company recorded research and development expense in the amount of $133, $195, and $2,111 for the years ended December 31, 2022, 2021, and 
2020, respectively, under the agreement. 

The University of Michigan License Agreement 

In 2016, the Company entered into a license agreement with the Regents of the University of Michigan, (the “University of Michigan”), a constitutional 
corporation of Michigan, under which the Company obtained an exclusive, royalty-bearing, sublicensable, worldwide license to make, sell and distribute 
products under certain patents owned by the University of Michigan related to microdystrophin and utrophin spectrin-like nucleic acid sequences for any 
use that, but for this agreement, would comprise an infringement of a valid claim included in the licensed patent rights. 

In consideration for the rights granted by the agreement, the Company paid a one-time license fee and a separate fee to cover past patent prosecution costs, 
which the Company recorded as a research and development expense in 2016. The Company was required to reimburse the University of Michigan for 
costs incurred in applying for, prosecuting and maintaining patents, and pay up to an aggregate of approximately $1,000 upon the achievement of certain 
milestones. There were no milestones achieved during the years ended December 31, 2022, 2021, and 2020. The Company was also required to pay a 
royalty of a low single digit percentage on future sales by the Company or its sublicensees of products developed using the licensed rights, with a minimum 
annual royalty after certain milestones are achieved. In addition, the Company was required to pay an annual maintenance fee in any year in which the 
minimum annual royalty is not reached. 

Under the agreement, the University of Michigan reserved for itself and its affiliates the right to use the licensed rights for non-commercial research, public 
service, internal and educational purposes and the right to grant the same limited non-commercial rights to other non-profit research institutions. 

F-27

 
The Company recorded and research and development expense in the amount of $0, $37 and $35 for the years ended December 31, 2022, 2021, and 2020, 
respectively, under the agreement. 

University of Florida License Agreements

In 2020, as amended, AavantiBio entered into license agreements with the University of Florida Research Foundation, Inc. (“UFRF”). Broadly, the 
agreements relate to FA. The Company acquired the agreements in connection with the Acquisition.  Under each agreement the Company obtained an 
exclusive, royalty-bearing, sublicensable, world-wide license to certain patents and patent applications and a royalty-bearing non-exclusive license under 
the know-how, to make, have made, use, see, have sold, import and export licensed products. UFRF retains the right to practice the patent rights and know-
how for internal non-commercial research, including research sponsored by commercial entities, and educational purposes.

In consideration for the rights granted under each agreement, AavantiBio paid a one-time non-refundable license fee. In connection with each agreement, 
the Company is required to pay an annual license maintenance fee until the first commercial sale of a licensed product after which time a minimum annual 
royalty will replace such maintenance fees. Under each agreement, the Company is required to reimburse UFRF for costs incurred in applying for, 
prosecuting and maintaining patents, pay up to an aggregate of approximately $2,900 upon the achievement of certain intellectual property, clinical and 
regulatory milestones for each licensed product under the agreement, and pay a low, single digit royalty on annual net sales by us and our sublicensees of 
licensed products on a licensed-product-by-licensed product basis. For any licensed product covered by both of these agreements, the Company is only 
obligated to make one payment for each milestone achieved and royalty payment due. Prior to the Acquisition, AavantiBio paid a single milestone fee 
related to the agreements of $50. Under each agreement, in the event the Company grants a sublicense to another party, the Company is required to pay 
UFRF a percentage of the consideration received.

Under each agreement, the Company has the right to grant sublicenses to third parties through multiple tiers, to the extent we are in compliance with our 
diligence obligations under the agreement and that sublicensee is subject to the terms of such agreement.

Under each agreement, the Company is obligated to use commercially reasonable efforts to develop and commercialize products covered by the licensed 
patent rights or know-how and to achieve certain regulatory and commercialization milestones within estimated time periods.

Under each agreement, UFRF controls the prosecution and maintenance of the licensed patents in consultation with the Company and at the Company's 
expense. In countries in which the Company has not requested prosecution or maintenance of licensed patents in a particular country or jurisdiction, the 
license granted to such patent rights will terminate in such country or jurisdiction. The Company has the first right to enforce such licensed patents at our 
expense.

Each of the agreements terminates on a licensed product-by-licensed product basis on the later of: (i) expiration of the patent rights covering such licensed 
product or (ii) ten (10) years from the first commercial sale of such licensed product. After five years, the Company may terminate an agreement for any 
reason giving advance written notice and reason for termination.  UFRF may terminate an agreement for our uncured default or breach of the agreement. 
UFRF may immediately terminate an agreement if we bring or assist others in bringing a patent challenge against of the licensed patent rights. If UFRF 
sends the Company a written demand to terminate a sublicense agreement due to such sublicensee bringing or assisting a patent challenge, UFRF may 
terminate such agreement if we do not terminate the license with such sublicensee.

14. Net Loss per Share 

Basic and diluted net loss per share were calculated as follows: 

The numerator for basic and diluted net loss per share is as follows: 

Net loss

For the Year Ended December 31,
2021

2022

2020

  $

(85,981 )   $

(72,188 )   $

(88,290 )

F-28

 
 
 
 
 
 
   
   
 
 
The denominator is as follows: 

Weighted average common stock outstanding,
   basic and diluted
Weighted average pre-funded warrants to 
   purchase common stock

Total

Net loss per share, basic and diluted is as follows: 

For the Year Ended December 31,
2021

2020

2022

8,512,089      

6,974,136      

3,311,706  

—      
8,512,089      

143,888      
7,118,024      

150,769  
3,462,475  

Net loss per share, basic and diluted

For the Year Ended December 31,
2021

2022

2020

  $

(10.10 )   $

(10.14 )   $

(25.50 )

The following potential common stock equivalents, presented based on amounts outstanding at each period end, were excluded from the calculation of 
diluted net loss per share for the periods indicated because including them would have had an anti-dilutive effect: 

Options to purchase shares of common stock
Unvested restricted stock units
Unvested shares of common stock

For the Year Ended December 31,
2021
400,842      
33,979      
—      
434,821      

2022
1,433,968    
512,557    
—    
1,946,525    

2020
207,851  
61,226  
4,670  
273,747  

15. Income Taxes 

The Company recorded no tax benefit for the years ended December 31, 2022 and 2021 for the net operating losses incurred due to its uncertainty of 
realizing a benefit from those items. 

A reconciliation of income taxes computed using the U.S. federal statutory rate to that reflected in operations as of December 31, 2022 and 2021 is as 
follows: 

Income tax computed at federal statutory tax rate
State taxes, net of federal benefit
Permanent differences
Bargain purchase gain
Tax credits
Change in deferred tax rate
Stock compensation cancelations
Other
Valuation allowance

December 31, 2022

December 31, 2021  

21.0 % 
7.4 % 
(1.4 )% 
4.5 % 
11.5 % 
0.1 % 
(1.9 )% 
(0.6 )% 
(40.6 )% 
0.0 % 

21.0 %
6.4 %
0.5 %
—  
12.1 %
0.3 %
(1.9 )%
0.1 %
(38.5 )%
0.0 %

The Company established deferred tax assets and liabilities on identified book to tax temporary differences as of the date of conversion to a C-corporation. 
Deferred income taxes reflect the net tax effects of these temporary differences between the 

F-29

 
 
 
 
 
 
   
   
 
   
   
   
 
 
 
 
 
   
   
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
  
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the 
Company’s net deferred tax assets as of December 31, 2022 and 2021 are as follows: 

December 31, 2022

December 31, 2021

Deferred tax assets:

Tax loss carryforwards
Tax credit carryforwards
Deferred expenses
Accrued expenses
Stock compensation
Intangible assets
Depreciation
Other

Total deferred tax assets
Valuation allowance
Deferred tax liabilities:
Right-of-use asset

Total deferred tax liabilities
Net deferred taxes

$

$

70,965    
46,786    
7,174    
1,901    
7,839    
36,553    
116    
166    
171,500    
(163,566 )  

(7,934 )  
(7,934 )  
—    

$

$

60,405  
36,905  
420  
815  
7,821  
19,919  
224  
2,373  
128,882  
(128,570 )

(312 )
(312 )
—  

As of December 31, 2022, the Company has federal net operating loss carryforwards of $259,924 which may be available to offset future taxable income 
and do not expire, but are limited in their usage to an annual deduction equal to 80% of annual taxable income. In addition, as of December 31, 2022, the 
Company has state net operating loss carryforwards of approximately $259,342 which may be available to offset future taxable income, of which $258,152 
begins to expire in 2038 and $1,190 has unlimited carryforward. The Company also had federal and state tax credits of $43,404 and $4,280, respectively, 
which may be used to offset future tax liability and each of which begin to expire in 2033. 

The Company’s ability to utilize these federal and state carryforwards may be limited in the future if the Company experiences an ownership change 
pursuant to Internal Revenue Code Section 382. Ownership changes, as defined in the Internal Revenue Code, including those resulting from the issuance 
of common stock in connection with the Company’s public offerings, may limit the amount of net operating loss and tax credit carryforwards that can be 
utilized to offset future taxable income or tax liability. The Company has not completed a study to assess whether a change of control has occurred or 
whether there have been multiple changes of control since inception due to the significant complexity and cost associated with such a study. If the 
Company has experienced a change of control, as defined by Section 382, at any time since inception, utilization of the net operating loss carryforwards tax 
credit carryforwards would be subject to an annual limitation under Section 382. Any limitation may result in expiration of a portion of the net operating 
loss carryforwards or research and development tax credit carryforwards before utilization. Further, until a study is completed and any limitation is known, 
no amounts are being presented as an uncertain tax position.

Section 382 also limits the Company’s ability to utilize the tax deductions associated with AavantiBio amortization and depreciation and AavantiBio’s net 
operating losses. As of December 31, 2022, the Company concluded that all of AavantiBio’s tax deductions associated with amortization and depreciation 
and AavantiBio’s net operating losses are more likely than not subject to restrictive limitation and will not be utilizable.

A valuation allowance is recorded against deferred tax assets if it is more likely than not that some or all of the deferred tax assets will not be realized. The 
Company has evaluated the positive and negative evidence bearing upon the realizability of the deferred tax assets. The Company concluded, in accordance 
with the applicable accounting standards, that it is more likely than not that the Company will be unable to realize the benefit of its deferred tax assets. 
Accordingly, the Company has recorded a full valuation allowance against its deferred tax assets. 
The following table presents the changes in the balance of the Company’s deferred income tax asset valuation allowance:

Valuation allowance at beginning of year

Increases recorded to income tax provision

Valuation allowance at end of year

December 31, 2022    
128,570    
34,996    
163,566    

$

$

December 31, 2021  
100,740  
27,830  
128,570  

$

$

The Company files tax returns as prescribed by the tax laws of the jurisdictions in which it operates. In the normal course of business, the Company is 
subject to examination by federal and state jurisdictions, where applicable. There are currently no pending income tax examinations. The Company’s C-
Corporation tax years beginning with the year ended December 31, 

F-30

 
 
 
   
 
 
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2019 are open under statute. Any tax credit or net operating loss carryforward can be adjusted in future periods after the respective year of generation’s 
statute of limitation has closed.

As of December 31, 2022 and 2021, the Company did not have unrecognized tax benefits. The Company recognizes interest and penalties related to 
income taxes as a component of income tax expense. As of December 31, 2022 and 2021, no interest and penalties have been recorded. 

16. Defined Contribution Plan 

The Company has a defined contribution savings plan under Section 401(k) of the Internal Revenue Code. The plan covers substantially all employees who 
meet minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pretax basis. Company 
contributions to the plan may be made at the discretion of the Company’s Board of Directors. The Company made $527 and $241 of contributions during 
the years ended December 31, 2022 and December 31, 2021, respectively. The company had made no contributions to the plan during the years ended 
December 31, 2020. 

17. Restructuring

January 2020 Plan 

In January 2020, the Company’s Board of Directors approved a restructuring plan to reduce operating costs and better align the Company’s workforce with 
the needs of its business following the Company’s November 2019 announcement that the SGT-001 IGNITE DMD trial was placed on clinical hold by the 
FDA.

Under the restructuring plan, the Company made changes to its management team and reduced headcount by approximately 30 percent. Affected 
employees were eligible to receive severance payments and outplacement services in connection with the restructuring plan. During year ended December 
31, 2020, the Company recorded aggregate restructuring charges of $1,944 related to severance payments and other employee-related costs. The Company 
does not expect to incur any additional significant costs associated with this restructuring. During the year ended December 31, 2020, $1,882 of the 
estimated restructuring charges were paid. 

April 2022 Plan

In April 2022, the Company implemented changes to its corporate strategy to prioritize the advancement of its then-key programs, SGT-001 and SGT-003. 
In connection with the changes to corporate operations, the Company reduced headcount by approximately 35 percent. During the year ended December 
31, 2022, the Company recorded and paid aggregate restructuring charges of $1,520 related to severance and other employee related costs in connection 
with the changes to its corporate strategy. The Company does not expect to incur any additional significant costs associated with this restructuring. 

November 2022 Plan

In November 2022, the Company’s Board of Directors approved a plan to reduce the Company’s workforce by approximately 18 percent. These reductions 
were completed by December 5, 2022. This plan was designed to streamline the Company’s operating structure following the Acquisition. The Company 
recorded a restructuring charge in the fourth quarter of 2022 of $5,658 related to the reduction in force, consisting of severance and other employee 
termination benefits. The Company paid $1,737 of this amount during the year ended December 31, 2022. The Company expects that approximately the 
remaining $3,921 will be paid by the first quarter of 2024.

F-31

 
 
The following table shows the total amount incurred and the liability related to the associated restructuring plans for the years ended December 31, 2022, 
2021 and 2020:

One-Time Employee
Termination Benefits

Accrued restructuring costs as of December 31, 2020
Restructuring charges incurred during the period
Amounts paid during the period

Accrued restructuring costs as of December 31, 2021
Restructuring charges incurred during the period
Amounts paid during the period

Accrued restructuring costs as of December 31, 2022

January 2020

April 2022

November 2022

62     $
—    
(62 )  
—     $
—    
—    
—     $

—     $
—      
—      
—     $
1,520      
(1,520 )    
—     $

—  
—  
—  
—  
5,658  
(1,737 )
3,921  

  $

  $

  $

F-32

 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 4.2

DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED

The following description of the securities of Solid Biosciences Inc. (“us,” “our,” “we” or the “Company”) registered under Section 12 of the Securities 
Exchange Act of 1934, as amended (the “Exchange Act”), is intended as a summary only and therefore is not a complete description. This description is 
based upon, and is qualified by reference to, our certificate of incorporation (“charter”), our bylaws and applicable provisions of the Delaware General 
Corporation Law (the “DGCL”). You should read our charter and bylaws, which are incorporated by reference as Exhibit 3.1 and Exhibit 3.2, respectively, 
to the Annual Report on Form 10-K of which this Exhibit 4.2 is a part, for the provisions that are important to you.

Authorized Capital Stock

Our  authorized  capital  stock  consists  of  60,000,000  shares  of  common  stock,  par  value  $0.001  per  share,  and  10,000,000  shares  of  preferred  stock,  par 
value $0.001 per share, all of which preferred stock is undesignated. Our common stock is registered under Section 12(b) of the Exchange Act.

Common Stock

Voting Rights. Each holder of our common stock is entitled to one vote for each share on all matters submitted to a vote of the stockholders, including the 
election of directors. Our stockholders do not have cumulative voting rights in the election of directors. Accordingly, holders of a majority of the voting 
shares are able to elect all of the directors.

Dividends.  Subject  to  preferences  that  may  be  applicable  to  any  then-outstanding  preferred  stock,  holders  of  our  common  stock  are  entitled  to  receive 
dividends, if any, as may be declared from time to time by our board of directors out of legally available funds.

Liquidation. In the event of our liquidation, dissolution or winding up, holders of our common stock will be entitled to share ratably in the net assets legally 
available for distribution to stockholders after the payment of all of our debts and other liabilities and the satisfaction of any liquidation preference granted 
to the holders of any then-outstanding shares of preferred stock. 

Other Rights. Holders of our common stock have no preemptive, conversion, subscription or other similar rights, and there are no redemption or sinking 
fund  provisions  applicable  to  our  common  stock.  The  rights,  preferences  and  privileges  of  the  holders  of  our  common  stock  are  subject  to  and  may  be 
adversely affected by the rights of the holders of shares of any series of our preferred stock that we may designate in the future. 

Preferred Stock

We are authorized to issue up to 10,000,000 shares of “blank check” preferred stock, which may be issued in one or more series upon authorization of our 
board of directors. Our board of directors is authorized to fix the designations, powers, preferences and the relative, participating, optional or other special 
rights and any qualifications, limitations and restrictions of the shares of each series of preferred stock. The authorized shares of our preferred stock are 
available for issuance without further action by our stockholders, unless such action is required by applicable law or the rules of any stock exchange on 
which our securities may be listed. If the approval of our stockholders is not required for the issuance of shares of our preferred stock, our board may 
determine not to seek stockholder approval. A series of our preferred stock could, depending on the terms of such series, impede the completion of a 
merger, tender offer or other takeover attempt.

Provisions of Our Certificate of Incorporation and Bylaws and the DGCL That May Have Anti-Takeover Effects

Board of Directors Vacancies: Our charter and bylaws authorize only our board of directors to fill vacant directorships, including newly created seats. In 
addition,  the  number  of  directors  constituting  our  board  of  directors  may  only  be  set  by  a  resolution  adopted  by  a  majority  vote  of  our  entire  board  of 
directors. These provisions would prevent a stockholder from increasing the size of our board of directors and then gaining control of our board of directors 
by 

filling  the  resulting  vacancies  with  its  own  nominees.  This  makes  it  more  difficult  to  change  the  composition  of  our  board  of  directors  but  promotes 
continuity of management. 

Classified Board: Our charter and bylaws provide that our board of directors will be classified into three classes of directors, each with staggered three-year 
terms.  A  third  party  may  be  discouraged  from  making  a  tender  offer  or  otherwise  attempting  to  obtain  control  of  us  as  it  is  more  difficult  and  time 
consuming for stockholders to replace a majority of the directors on a classified board of directors. 

Stockholder Action; Special Meetings of Stockholders: Our charter provides that our stockholders may not take action by written consent, but may only 
take action at annual or special meetings of our stockholders. As a result, a holder controlling a majority of our capital stock would not be able to amend 
our bylaws or remove directors without holding a meeting of our stockholders called in accordance with our bylaws. Further, our bylaws and charter will 
provide that special meetings of our stockholders may be called only by a majority of our board of directors, the Chairman of our board of directors or our 
Chief Executive Officer, thus prohibiting a stockholder from calling a special meeting. These provisions might delay the ability of our stockholders to force 
consideration of a proposal or for stockholders controlling a majority of our capital stock to take any action, including the removal of directors. 
Advance Notice Requirements for Stockholder Proposals and Director Nominations: Our bylaws provide advance notice procedures for stockholders 
seeking to bring matters before our annual meeting of stockholders or to nominate candidates for election as directors at our annual meeting of 
stockholders. Our bylaws also specify certain requirements regarding the form and content of a stockholder’s notice. These provisions might preclude our 
stockholders from bringing matters before our annual meeting of stockholders or from making nominations for directors at our annual meeting of 
stockholders if the proper procedures are not followed. We expect that these provisions might also discourage or deter a potential acquirer from conducting 
a solicitation of proxies to elect the acquirer’s own slate of directors or otherwise attempting to obtain control of our company.

Supermajority Voting: The DGCL provides, generally, that the affirmative vote of a majority of the shares entitled to vote on any matter is required to 
amend a corporation’s certificate of incorporation or bylaws, unless a corporation’s certificate of incorporation or bylaws, as the case may be, requires a 
greater percentage. Our bylaws may be amended or repealed by a majority vote of our board of directors or the affirmative vote of the holders of at least 
two-thirds of the votes that all our stockholders would be entitled to cast in an annual election of directors. In addition, the affirmative vote of the holders of 
at least two-thirds of the votes that all our stockholders would be entitled to cast in an election of directors is required to amend or repeal or to adopt certain 
provisions of our charter.

No Cumulative Voting: The DGCL provides that stockholders are not entitled to the right to cumulate votes in the election of directors unless a 
corporation’s certificate of incorporation provides otherwise. Our charter does not provide for cumulative voting.

Removal of Directors Only for Cause: Our charter provides that stockholders may remove directors only for cause and only by the affirmative vote of the 
holders of at least two-thirds of our outstanding common stock.

Delaware Business Combination Statute. We are subject to the provisions of Section 203 of the DGCL, regulating corporate takeovers. In general, DGCL 
Section 203 prohibits a publicly held Delaware corporation from engaging in a business combination with an interested stockholder for a period of three 
years following the date on which the person became an interested stockholder unless (i) prior to the date of the transaction, the board of directors of the 
corporation approved either the business combination or the transaction which resulted in the stockholder becoming an interested stockholder; (ii) upon 
consummation of the transaction that resulted in the stockholder becoming an interested stockholder, the interested stockholder owned at least 85% of the 
voting stock of the corporation outstanding at the time the transaction commenced, excluding for purposes of determining the voting stock outstanding, but 
not the outstanding voting stock owned by the interested stockholder, (a) shares owned by persons who are directors and also officers and (b) shares owned 
by employee stock plans in which employee participants do not have the right to determine confidentially whether shares held subject to the plan will be 
tendered in a tender or exchange offer; or (iii) at or subsequent to the date of the transaction, the business combination is approved by the board of directors 
of the corporation and authorized at an annual or special meeting of stockholders, and not by written consent, by the affirmative vote of at least two-thirds 
of the outstanding voting stock that is not owned by the interested stockholder.

 
 
Generally, a business combination includes a merger, asset or stock sale, or other transaction or series of transactions together resulting in a financial 
benefit to the interested stockholder. An interested stockholder is a person who, together with affiliates and associates, owns or, within three years prior to 
the determination of interested stockholder status, did own 15% or more of a corporation’s outstanding voting stock. We expect the existence of this 
provision to have an anti-takeover effect with respect to transactions our board of directors does not approve in advance. We also anticipate that DGCL 
Section 203 may also discourage attempts that might result in a premium over the market price for the shares of common stock held by stockholders.

Exclusive Forum Selection. Our charter provides 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 DGCL, 
our charter or our bylaws; any action to interpret, apply, enforce or determine the validity of our charter or our bylaws; or any action asserting a claim 
against us that is governed by the internal affairs doctrine. We do not intend to have this choice of forum provision apply to, and this choice of forum 
provision will not apply to, actions arising under the Securities Act of 1933, as amended, or the Exchange Act.

2

 
SOLID BIOSCIENCES INC.

NON-EMPLOYEE DIRECTOR COMPENSATION POLICY

Exhibit 10.12

The non-employee directors of Solid Biosciences Inc. (the “Company”) shall receive the following compensation for their service as 
members of the Board of Directors of the Company (the “Board”).

Director Compensation

Our goal is to provide compensation for our non-employee directors in a manner that enables us to attract and retain outstanding director 
candidates and reflects the substantial time commitment necessary to oversee the Company’s affairs. We also seek to align the interests of our 
directors and our stockholders, and we have chosen to do so by compensating our non-employee directors with a mix of cash and equity-
based compensation.

Cash Compensation

The fees that will be paid to our non-employee directors for service on the Board, and for service on each committee of the Board on which 
the director is then a member, and the fees that will be paid to the chairperson of each committee of the Board will be as follows:

Board of Directors
Audit Committee
Clinical Committee
Compensation Committee
Nominating and Corporate Governance Committee

$40,000
$7,500
$7,500
$5,000
$4,000

$35,000
$7,500
$7,500
$5,000
$4,000

Member Annual Fee

Chairperson Incremental Annual Fee

The foregoing fees will be payable in arrears in equal semi-annual installments not later than the 15th business day following the end of the 
second and fourth calendar quarters, provided that the amount of such payment will be prorated for any portion of such semi-annual period 
that the director is not serving on the Board, on such committee or in such position, and no fee shall be payable in respect of any period prior 
to the completion of our initial public offering.

Equity Compensation

Initial Stock Option Grants. Upon initial election to our Board, each non-employee director will be granted, automatically and without the 
need for any further action by the Board, an initial equity award of an option to purchase 19,300 shares of our common stock. The option 
shall have a term of ten years from the grant date and shall vest and become exercisable as to 1/3 of the shares underlying such option on 
each anniversary of the grant date until the third anniversary of the grant date, subject to the director’s continued service as a director through 
each applicable vesting date. The vesting shall accelerate as to 100% of the shares upon a change in control of the Company. The exercise 
price shall be the closing price of our common stock on the date of grant.

 
 
 
 
 
 
 
  
  
 
 
 
Annual Stock Option Grants. Each non-employee director who has served as a member of our Board for at least six months prior to the date 
of our annual meeting of stockholders for a particular year will be granted, automatically and without the need for any further action by the 
Board, an equity award on the date of such annual meeting of an option to purchase 9,650 shares of our common stock. The option shall have 
a term of ten years from the grant date and shall vest and become exercisable in full on the earlier to occur of the one-year anniversary of the 
grant date and immediately prior to our first annual meeting of stockholders occurring after the grant date, subject, in each case, to the 
director’s continued service as a director through the applicable vesting date. The vesting shall accelerate as to 100% of the shares upon a 
change in control of the Company. The exercise price shall be the closing price of our common stock on the date of grant.

The foregoing share amounts shall be adjusted in the event of certain changes in the capital structure or business of the Company, including 
any stock split, reverse stock split, stock dividend, combination or reclassification of shares, recapitalization, spin off or other similar change 
in the Company’s capitalization and any non-cash dividend or distribution to holders of common stock, in each case in accordance with the 
terms of our 2020 Equity Incentive Plan, or any successor plan.

The initial stock option awards and the annual stock option awards shall be subject to the terms and conditions of our 2020 Equity Incentive 
Plan, or any successor plan, and the terms of the option agreements entered into with each director in connection with such awards.

Expenses

Upon presentation of documentation of such expenses reasonably satisfactory to the Company, each non-employee director shall be 
reimbursed for his or her reasonable out-of-pocket business expenses incurred in connection with the performance of their duties as directors, 
including travel expenses in connection with their attendance in-person at Board and committee meetings. 

Effective: June 16, 2020, as amended June 7, 2022 and December 13, 2022. 

 
 
 
 
 
 
 
Solid Biosciences Inc.

Executive Chairman Agreement

EXECUTIVE CHAIR AGREEMENT

Exhibit 10.17

This Executive Chair Agreement (together with Exhibit A, the “Agreement”), effective  January 1, 2022 (the “Effective 
Date”),  is  by  and  between  Ian  F.  Smith,  an  individual  having  an  address  at  45  Commonwealth  Avenue,  Unit  3,  Boston,  MA 
02116 (the “Executive Chair”), and Solid Biosciences Inc., a Delaware corporation (together with its affiliates, the “Company”), 
having an address at 141 Portland Street, Fifth Floor,  Cambridge, MA 02139. 

WHEREAS, Executive Chair is currently serving as a member and chairman of the Board of Directors of the Company 

(the “Board”);

WHEREAS, Executive Chair has also been providing advisory services to Company pursuant to a consulting agreement 
between the Parties entered into on January 4, 2021 (the “Prior Agreement”) and both parties acknowledge and agree that, as of 
the Effective Date of this Agreement, the agreed upon services under the Prior Agreement have been completed;

WHEREAS, from and after the close of business on the Effective Date, Executive Chair shall no longer serve under the 

Prior Agreement, but shall be retained as the Executive Chairman pursuant to the terms and conditions set forth herein; and

NOW  THEREFORE,  in  consideration  of  the  promises  and  mutual  covenants  herein  and  for  other  good  and  valuable 
consideration,  the  receipt  and  sufficiency  of  which  are  hereby  acknowledged,  Executive  Chair  and  the  Company  agree  as 
follows:

1.

Services. Company retains Executive Chair, and Executive Chair agrees to provide, part-time advisory services 
to Company, consistent with his position as Executive Chairman of the Board, and as more fully set forth on Exhibit A attached 
hereto (the “Services”).  It is understood and agreed that the Executive Chair will not be an executive officer of the Company and 
that Chief Executive Officer of the Company will continue to be the Company’s principal executive officer and will continue to 
report directly to the board of directors and to the Executive Chairman. 

2.

Compensation.  As consideration for Services provided under this Agreement, the Company shall grant, subject 
to  approval  of  Company’s  Board,  to  Executive  Chair  an  option  to  purchase  194,500  shares  of  the  Company’s  Common  Stock 
(“Stock Options”) at an exercise price per share equal to the closing price of the Company’s Common Stock on January 3, 2021  
(the “Grant Date”), and 97,250 restricted stock units (the “RSUs” and together with the RSUs, the “Awards”). The Awards will 
vest in equal quarterly installments with the first installment vesting three months from the Grant Date and the final installment 
vesting  date  on  the  date  that  is  12  months  from  the  Grant  Date,  subject  to  continued  services  as  a  Director  of  the  Company. 
Additionally, in the event of a change in control of the Company and on terms consistent with board of director equity award 
agreements, all unvested Awards will accelerate and vest in full.

 
 
 
 
 
3.

Work-Made-for Hire. 

(a)  All  right,  title  and  interest  in  any  and  all  writings,  ideas,  inventions,  know-how,  designs,  improvements  or  other  
property created during Executive Chair’s advisory relationship relating in any way to the assets, business or operations of the 
Company,  constituting  copyrights,  patents,  trademarks,  service  marks  and  related  rights  or  other  forms  of  proprietary  rights  or 
information (regardless of whether any such copyrights, patents, trademarks and service marks or other rights have or may be 
registered) that are created, adapted or improved by Executive Chair (whether alone or in conjunction with any other person or 
employee),  and  all  material  created  during  Executive  Chair’s  advisory  relationship  that  includes  any  of  the  foregoing 
(collectively, “Covered Material”), shall be owned by the Company and to the extent that it includes copyrightable subject matter, 
shall be deemed a work made for hire for the Company within the meaning of the United States Copyright Act of 1976 and for all 
other purposes.  If any Covered Material is deemed not to be work made for hire, such Covered Material is hereby assigned by 
Executive Chair to the Company and Executive Chair shall not have or claim to have, under this Agreement or otherwise, any 
right, title or interest of any kind or nature whatsoever in such Covered Material.

(b)  The Company shall have the right to apply for and obtain registrations in the United States Copyright Office and the 
United States Patent and Trademark Office, in its own or its designee’s name, of its rights in any or all of the Covered Material.  
If  for  any  reason  the  rights  in  any  Covered  Material  are  registered,  or  applied  to  be  registered,  in  Executive  Chair’s  name, 
Executive Chair shall assign in writing such application or registration to the Company and hereby authorizes and appoints the 
Company its agent for the purpose of recording such assignment.

(c)  Upon request of Company, Executive Chair shall execute, acknowledge and deliver all applications, assignments or 
other  instruments;  make  or  cause  to  be  made  all  rightful  oaths;  testify  in  all  legal  proceedings;  communicate  all  known  facts 
which  relate  to  such  works,  copyrights,  inventions,  ideas,  discoveries,  designs  and  improvements;  perform  all  lawful  acts  and 
otherwise render all such assistance as the Company may deem necessary to protect the Company’s interest therein including any 
assistance  which  the  Company  shall  deem  necessary  in  connection  with  any  proceeding  or  litigation  involving  the  same.    The 
Company shall reimburse Executive Chair for all reasonable out-of-pocket costs, incurred by Executive Chair in rendering any 
such  assistance  requested  by  the  Company  pursuant  to  this  Section.  In  the  event  that  Executive  Chair  should  fail  or  refuse  to 
execute such documents within a reasonable time, Executive Chair appoints Company as attorney to execute and deliver any such 
documents on Executive Chair’s behalf.

4.

Nondisclosure.    Executive  Chair  agrees  to  (a)  hold  the  Confidential  Information  (as  defined  below)  in 
confidence; (b) not disclose any Confidential Information to any third party without the prior written consent of Company; (c) not 
use  the  Confidential  Information  for  any  purpose  except  solely  as  required  to  perform  the  Services;  and  (d)  treat  Confidential 
Information with no less than a reasonable degree of care. For purposes of this Agreement, the term “Confidential Information” 
means any and all information and derivative information, in whatever form or medium, including oral information, concerning 
or relating to the Company or information of any third party that the Company is under an obligation to keep confidential or that 
is maintained by the Company as confidential, including, without limitation, intellectual property of the Company, such as, but 
not limited to, Covered Material, patent applications, copyrights, copyright 

 
 
 
 
applications, and trade secrets; information regarding or resulting from research and development activities performed by or on 
behalf  of  the  Company  and  other  projects  (such  as,  but  not  limited  to,  preclinical  and  clinical  data,  design  details  and 
specifications, engineering information, and works in process); and business and financial information (such as, but not limited 
to,  current,  future,  and  proposed  products  and  services,  financial  information  and  models,  information  relating  to  procurement 
requirements, purchasing, manufacturing, investors, customer lists, customers, suppliers, facilities, product plans, product ideas, 
business strategies, marketing or business plans, financial or personnel matters, investors, employees, business and contractual 
relationships,  business  forecasts,  sales,  strategies,  operations,  policies,  procedures,  commercialization  capabilities,  and 
information regarding third parties). Notwithstanding the foregoing, Confidential Information does not include information that 
Executive Chair can demonstrate: (a) is publicly known and generally available in the public domain other than in consequence 
of  improper  action  by  any  person;  or  (b)  was  acquired  by  Executive  Chair  free  and  clear  of  any  duty  of  confidentiality  or 
restricted use and without improper action by the transferor of such information or any other person.  Executive Chair shall keep 
confidential  all  matters  entrusted  to  Executive  Chair  by  or  on  behalf  of  the  Company  and  shall  not  use  or  attempt  to  use  any 
Confidential Information except as may be required in the ordinary course of performing Executive Chair’s duties as an advisor 
to the Company, and Executive Chair shall not use any Confidential Information in any manner that may injure or cause loss or 
may  be  calculated  to  injure  or  cause  loss  to  the  Company,  whether  directly  or  indirectly.  Nothing  in  this  Agreement  prohibits 
Executive Chair from reporting possible violations of federal or state law or regulations to any governmental agency or entity or 
self-regulatory  institution,  including  but  not  limited  to  the  Equal  Employment  Opportunity  Commission,  the  National  Labor 
Relations Board, the Department of Justice, the Securities and Exchange Commission, Congress, and any Inspector General, or 
making  other  disclosures  that  are  protected  under  the  whistleblower  provisions  of  federal  or  state  law  or  regulation.  Prior 
authorization of the Company shall not be required to make any such reports or disclosures and Executive Chair is not required to 
notify the Company that Executive Chair has made such reports or disclosures.

5.

Compliance  with  Laws.  Executive  Chair  agrees  to  provide  the  Services  to  Company  and  its  affiliates  in 
accordance  with  all  applicable  laws  and  regulations  and  the  highest  professional  standards.  Executive  Chair  represents  and 
warrants that Executive Chair has not been, and is not under consideration to be (a) debarred from providing services pursuant to 
Section 306 of the United States Federal Food Drug and Cosmetic Act, 21 U.S.C. § 335a; (b) excluded, debarred or suspended 
from, or otherwise ineligible to participate in, any federal or state health care program or federal procurement or non-procurement 
programs (as that term is defined in 42 U.S.C. § 1320a-7b(f)); (c) disqualified by any government or regulatory agencies from 
performing specific services, and is not subject to a pending disqualification proceeding; or (d) convicted of a criminal offense 
related to the provision of health care items or services, or under investigation or subject to any such action that is pending.

 
 
 
6.

Compliance  with  Obligations  to  Third  Parties.  Executive  Chair  represents  and  warrants  to  Company  that  the 
terms  of  this  Agreement  and  Executive  Chair’s  performance  of  Services  do  not  and  will  not  conflict  with  any  of  Executive 
Chair’s obligations to any third parties. Executive Chair represents that Executive Chair has not brought and will not bring with 
Executive  Chair  to  Company  or  use  in  the  performance  of  Services  any  equipment,  funds,  space,  personnel,  facilities, 
confidential information, trade secrets or other resources of any third party which are not generally available to the public, nor 
will  Executive  Chair  take  any  other  action  that  would  result  in  a  third-party  asserting  ownership  of,  or  other  rights  in,  any 
Covered Material. If Executive Chair is a faculty member at or employee of a university or hospital or another organization or 
company (“Institution”), Executive Chair represents and warrants that Executive Chair is not prohibited by any applicable policy 
of  such  Institution,  including  without  limitation  any  policy  addressing  conflicts  of  interest  or  intellectual  property,  from 
performing external consulting services and assigning rights to intellectual property arising from such services to Company or a 
third  party.  To  the  extent  Executive  Chair  is  subject  to  any  policy  of  his/her  employer  that  requires  approval  of  agreements 
governing  external  consulting  services,  Executive  Chair  represents  that  such  approval  has  been  given  and  covenants  that  such 
approval will be obtained prior to entering into any amendment to this Agreement requiring such approval.  

7.

Non-hire of Employees and Consultants.  During the Term and for a one year period thereafter, Executive Chair 
will  not  (except  on  the  Company’s  behalf),  directly  or  indirectly,  alone  or  as  a  consultant,  partner,  officer,  director,  employee, 
joint venturer, lender or stockholder of any entity, employ, hire, retain, attempt to employ, hire or retain, or knowingly permit any 
company  or  business  organization  by  which  Executive  Chair  is  employed  or  which  is  directly  or  indirectly  controlled  by 
Executive  Chair  to  employ,  hire  or  retain,  any  Company  employee  or  consultant,  or  any  such  person  whose  employment  or 
consultancy with the Company has terminated within six months prior to or after Executive Chair’s departure from the Company.

8.

Nonsolicitation of Employees and Consultants.  During the Term and for a one year period thereafter, Executive 
Chair  will  not  (except  on  the  Company’s  behalf),  directly  or  indirectly,  alone  or  as  a  consultant,  partner,  officer,  director, 
employee, joint venturer, lender or stockholder of any entity, in any manner seek to solicit or induce any Company employee or 
consultant, or any such person whose employment or consultancy with the Company has terminated within six months prior to or 
after Executive Chair’s departure from the Company, to leave his or her employment or consultancy with the Company, or assist 
in the recruitment or hiring of any such person.

9.

Nondisparagement.  Executive Chair shall not at any time, whether during or after the Term, regardless of the 
reason for such termination, make to any person or entity disparaging, critical or otherwise detrimental comments of a business or 
personal nature relating to the Company or its personnel.

10.

Use  of  Name.  Executive  Chair  will  not  use  the  name,  logo,  trade  name,  service  mark,  or  trademark,  or  any 
simulation, abbreviation, or adaptation of same, or the name of Company or any of its affiliates for publicity, promotion, or other 
uses without Company’s prior written consent.

 
 
 
11.

Company Property.  Executive Chair shall not make, use or permit to be used any Company Property otherwise
than for the benefit of the Company.  The term “Company Property” shall include all Confidential Information; the Company’s 
records, files and data; all Company computers, cellular telephones, personal digital assistants, credit and/or calling cards, keys, 
access  cards  and  the  like;  and  all  other  documentation  or  materials  of  any  nature  and  in  any  form,  whether  written,  printed, 
electronic or in digital format or otherwise, relating to any matter within the scope of the business of the Company or concerning 
any of its dealings or affairs and any other Company property in Executive Chair’s possession, custody or control.  Executive 
Chair  further  agrees  that  upon  expiration  or  termination  of  this  Agreement,  Executive  Chair  shall  immediately  return  all 
Company Property to Company. Executive Chair acknowledges and agree that all Company Property shall be and remain the sole 
and exclusive property of the Company. Immediately upon the expiration or termination of this Agreement, Executive Chair shall 
deliver all Company Property in Executive Chair’s possession, and all copies thereof, to the Company.

12.

Term  &  Termination.    The  term  of  this  Agreement  will  commence  on  the  Effective  Date  and  will  expire  on 
December  31,  2022,  unless  extended  by  mutual  written  agreement  of  the  parties  or  earlier  terminated  in  accordance  with  this 
Section 12 (the “Term”). Notwithstanding anything to the contrary herein, the Company may terminate this Agreement, for any 
or  no  reason,  on  written  notice  to  Executive  Chair  and  Executive  Chair  may  terminate  this  agreement,  for  any  reason  or  no 
reason, on fifteen (15) days prior written notice to the Company.

13.

Notices.  All  notices  required  or  permitted  under  this  Agreement  must  be  in  writing  and  must  be  given  by 
directing the notice to the address for the receiving party set forth in this Agreement or at such other address as the receiving 
party  may  specify  in  writing  under  this  procedure.  Notices  to  Company  will  be  marked  “Attention:  Chief  Legal  Officer.”  All 
notices  must  be  given  (i)  by  personal  delivery,  with  receipt  acknowledged,  (ii)  by  prepaid  certified  or  registered  mail,  return 
receipt requested, or (iii) by prepaid recognized next business day delivery service. Notices will be effective upon receipt or at a 
later date stated in the notice.

14.

Remedies. Executive Chair agrees that (i) Company may be irreparably injured by a breach of this Agreement 
by Executive Chair; (ii) money damages would not be an adequate remedy for any such breach; (iii) as a remedy for any such 
breach  Company  will  be  entitled  to  seek  equitable  relief,  including  injunctive  relief  and  specific  performance,  without  being 
required  by  Executive  Chair  to  post  a  bond;  and  (iv)  such  remedy  will  not  be  the  exclusive  remedy  for  any  breach  of  this 
Agreement.

15.

Independent Contractor.  Executive Chair is an independent contractor and not an employee of the Company. 
Executive  Chair  shall  be  responsible  for  all  taxes  arising  from  compensation  and  other  amounts  paid  under  this  Agreement. 
Neither federal, state or local income tax, nor payroll tax of any kind, shall be withheld or paid by the Company on Executive 
Chair’s behalf.  Executive Chair will not be eligible for, and shall not participate in, any employee pension, health, welfare, or 
other fringe benefit plan of the Company.

16.

Waiver; Amendments.  Any waiver by the Company of a breach of any provision of this Agreement shall not 
operate or be construed as a waiver of any subsequent breach of such provision or any other provision hereof.  In addition, any 
amendment  to  or  modification  of  this  Agreement  or  any  waiver  of  any  provision  hereof  must  be  agreed  to  in  writing  by  both 
parties.

 
 
 
17.

Severability.    Executive  Chair  agrees  that  each  provision  and  the  subparts  of  each  provision  herein  shall  be 
treated as separate and independent clauses, and the unenforceability of any one clause shall in no way impair the enforceability 
of any of the other clauses of the Agreement. Moreover, if one or more of the provisions contained in this Agreement shall for 
any  reason  be  held  to  be  excessively  broad  as  to  scope,  activity,  subject  or  otherwise  so  as  to  be  unenforceable  at  law,  such 
provision  or  provisions  shall  be  construed  by  the  appropriate  judicial  body  by  limiting  or  reducing  it  or  them,  so  as  to  be 
enforceable to the maximum extent compatible with the applicable law as it shall then appear.  Executive Chair hereby further 
agrees that the language of all parts of this Agreement shall in all cases be construed as a whole according to its fair meaning and 
not strictly for or against either of the parties.

18.

Survival.  Executive  Chair’s  obligations  under  Section  3  through  22  of  this  Agreement  shall  survive  the 
expiration  or  termination  of  this  Agreement  and  shall  be  binding  upon  Executive  Chair’s  successors,  heirs,  executors, 
administrators and legal representatives.

19.

Assignment.  The Company shall have the right to assign this Agreement to its successors and assigns, and all 
covenants and agreements hereunder shall inure to the benefit of and be enforceable by said successors or assigns.  Executive 
Chair may not assign this Agreement. In no event will Executive Chair assign or delegate responsibility for actual performance of 
the Services to any third party.

20.

Governing  Law.    This  Agreement  shall  be  governed  by  and  construed  in  accordance  with  the  laws  of  the 
Commonwealth of Massachusetts, without giving effect to the principles of conflicts of laws of such state.  The parties agree to 
submit  to  the  exclusive  jurisdiction  of  the  state  and  federal  courts  located  in  Commonwealth  of  Massachusetts  and  waive  any 
defense of inconvenient forum to the maintenance of any action or proceeding in such courts.

21.

Entire Agreement.  This Agreement sets forth the complete, sole and entire agreement between the parties with 
respect  to  the  subject  matter  herein  and  supersedes  any  and  all  other  agreements,  negotiations,  discussions,  proposals,  or 
understandings, whether oral or written, previously entered into, discussed or considered by the parties.

22.

Counterparts. This Agreement may be executed in any number of counterparts, each of which will be deemed an
original, but all of which together will constitute one and the same instrument. A facsimile or portable document format (“.pdf”) 
copy of this Agreement, including the signature pages, will be deemed an original.

 
 
 
IN WITNESS HEREOF, Executive Chair has executed this Agreement as of the last date written below.   

SOLID BIOSCIENCES INC.

By:
Name:
Title:

  /s/ Ilan Ganot
  Ilan Ganot
  President & Chief Executive Officer

  IAN F. SMITH

  /s/ Ian Smith

 
 
 
 
   
   
   
   
 
 
 
 
Solid Biosciences Inc.

Executive Chairman Agreement

Executive Chairman Services

EXHIBIT A

Exhibit 10.17

The  Company  requires,  in  addition  to  the  traditional  duties  as  Chairman  of  the  Board,  that  the  Executive  Chair,  as 
Executive Chairman, will be available to perform the duties customarily related to this function, including:

•

Provide mentorship and guidance to the Company’s Chief Executive Officer (who will remain the Company’s 
principal  executive  officer)  and  senior  leadership  team  on  operational  and  strategic  matters;  Chief  Executive 
Officer will continue to report to the Board, as well as to the Executive Chair

• Act as a liaison between the Company’s senior management and the Board; 

•

Participate in regular meetings with the Chief Executive Officer and Chief Operating Officer to further advance 
the Company’s strategic initiatives; 

• Make  himself  available  as  reasonably  requested  by  the  Board  or  Executive  Chair  officers  of  the  Company  to 
fulfill  such  other  duties  as  may  be  reasonably  requested,  consistent  with  his  status  as  the  Executive  Chair 
Chairman; and

• Devote between thirty-five to fifty (35-50) hours per month, including one (1) full day per week, on a schedule 
and at a location(s) mutually agreed between Executive Chair and the Company’s Chief Executive Officer, to 
include flexible availability to the Company’s Chief Executive Officer and Chief Operating Officer

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
FIRST AMENDMENT TO 

EXECUTIVE CHAIR AGREEMENT

THIS  FIRST  AMENDMENT  TO  EXECUTIVE  CHAIR  AGREEMENT  is  effective  September  30,  2022  (the  “First 
Amendment Date”), is by and between Ian F. Smith, an individual having an address at 104 Meadowbrook Road, Weston, MA, 
02493 (the “Executive Chair”), and Solid Biosciences Inc., a Delaware corporation (together with its affiliates, the “Company”), 
having an address at 500 Rutherford Ave., Charlestown, MA 02129. 

WHEREAS, Executive Chair and the Company are parties to that certain Executive Chair Agreement (“Agreement”), 

effective as of January 1, 2022 (the “Effective Date”), and 

 WHEREAS, the parties desire to amend the Agreement in manner set forth below.

NOW, THEREFORE, in consideration of the premises and for other good and valuable consideration, the receipt and 

sufficiency of which are hereby acknowledged, the parties agree as follows:

1.

Compensation.   Section 2 of the Agreement is amended by inserting a new Section 2A as follows: and 

restated in its entirety as follows: 

“2A.  Compensation – 2023.  As consideration for Services provided under this Agreement from and after January 1, 
2023, the Company shall, subject to approval of Company’s Board, grant to Executive Chair equity awards (the “2023 
Awards”) with an aggregate total Black Scholes value of $700,000, consisting of (i) 50% stock options (the “2023 Stock 
Options”) at an exercise price per share equal to the closing price of the Company’s Common Stock on January 2, 2023 
(the “2023 Grant Date”) and (ii) 50% restricted stock units (“2023 RSUs”), in each case adjusted, as applicable and 
appropriate, to reflect fully the effect of any reclassification, stock split, reverse split, stock dividend, reorganization, 
recapitalization or other like change with respect to Company Common Stock occurring (or for which a record date is 
established) after the date of this Amendment and prior to the 2023 Grant Date. The 2023 Awards will vest in equal 
quarterly installments with the first installment vesting three months from the 2023 Grant Date and the final installment 
vesting date on the date that is 12 months from the 2023 Grant Date, subject to continued services as a Director of the 
Company. Additionally, in the event of (i) the early termination of this Agreement prior to the expiration of the Term 
and/or (ii) a change in control of the Company and on terms consistent with board of director equity award agreements, 
all unvested 2023 Awards will accelerate and vest in full.”

2.

Term.  Section 12 of the Agreement is amended and restated in its entirety as follows: 

 
 
 
 
 
 
 
 
“Term & Termination.  The term of this Agreement will commence on the Effective Date and will expire on December 
31,  2023,  unless  extended  by  mutual  written  agreement  of  the  parties  or  earlier  terminated  in  accordance  with  this 
Section 12 (the “Term”).Notwithstanding anything to the contrary herein, the Company may terminate this Agreement, 
for any or no reason, on written notice to Executive Chair and Executive Chair may terminate this agreement, for any 
reason or no reason, on fifteen (15) days prior written notice to the Company.  The Board shall periodically review the 
ongoing benefit of the Executive Chair position to the Company and may elect to terminate the Agreement in accordance 
with the preceding sentence following any such review.” 

3.  Governing Law.  This First Amendment shall be governed by and construed in accordance with the laws of the 
Commonwealth of Massachusetts, without giving effect to the principles of conflicts of laws of such state.  The parties agree to 
submit to the exclusive jurisdiction of the state and federal courts located in Commonwealth of Massachusetts and waive any 
defense of inconvenient forum to the maintenance of any action or proceeding in such courts.

4.  Entire Agreement.  Except as amended hereby, the Agreement shall  remain in full force and effect as originally 

written..

[Signature page follows]

 
 
 
 
IN WITNESS WHEREOF, the parties have executed this First Amendment to Executive Chair Agreement as of 

the date first above written.

SOLID BIOSCIENCES INC.

By: /s/ Ilan Ganot 

Name: Ilan Ganot

Title: Chief Executive Officer

IAN F. SMITH

/s/ Ian F. Smith 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of 
information that the registrant treats as private or confidential. Double asterisks denote omission.
STANDARD EXCLUSIVE LICENSE AGREEMENT WITH KNOW-HOW
Agreement No: A19110

Exhibit   10.42

TABLE OF CONTENTS

Section 1 Definitions 
Section 2 Grant 
Section 3 Diligence Obligations 
Section 4 Payments 
Section 5 Warranties and Disclaimers of UFRF 
Section 6 Record Keeping; Accounting 
Section 7 Patent Prosecution 
Section 8 Infringement and Invalidity 
Section 9 Term and Termination 
Assignability 
Section 10 
Dispute Resolution 
Section 11 
Indemnification; Insurance 
Section 12 
Section 13 
Use of Names 
Section 14  Miscellaneous 
Section 15 
Section 16 
Section 17 
Section 18 

Notices 
Confidentiality 
University Rules and Regulations 
Contract Formation and Authority 

Appendix A - Patent Rights and Know-How 
Appendix B - Development Plan 
Appendix C - Development Report 
Appendix D - UFRF Royalty Report 
Appendix E - Standard Exclusive License Agreement A19111

 
 
  
STANDARD EXCLUSIVE LICENSE AGREEMENT WITH KNOW-HOW

Agreement No: A19110

This Standard Exclusive License Agreement with Know-How (this “Agreement”) is effective as of March 17, 2020, (the 
“Effective Date”) between the University of Florida Research Foundation, Incorporated (hereinafter called “UFRF”), a nonstock, 
nonprofit Florida corporation, and Aavanti Bio, Inc., (hereinafter called “Licensee”), a Delaware corporation having its principal 
office/place of business at 3324 W. University Avenue, #261, Gainesville, FL, 32607-2504.

WHEREAS, Licensee is engaged in business relating to the development and commercialization of products that can use 
or incorporate UFRF’s intellectual property rights and has the capability of developing commercial applications of the intellectual 
property; and 

WHEREAS, UFRF owns inventions that are described below; UFRF is willing to grant a license to Licensee under the 

Patent Rights (defined in Section 1.14) and Know-How (as defined in Section 1.8); and Licensee desires a license under them.

THEREFORE, the parties agree as follows:

Section 1.Definitions

1.1

“Affiliate” means: any entity that directly or indirectly owns or controls, is owned or controlled by; or is under 
common ownership or control with a party to this Agreement; where “ownership” and “control” mean: (a) possession, or the right 
to possession, of at least fifty percent (50%) of the equity or voting stock of the entity or (b) the power to direct the management 
and policies of the entity; (c) the power to appoint or remove a majority of the board of directors of the entity; or (d) the right to 
receive 50% or more of the profits or earnings of the entity. While an entity is entitled to the benefits of an Affiliate under this 
Agreement  for  only  the  period  of  time  the  entity  qualifies  as  an  Affiliate  under  this  definition,  all  obligations  under  this 
Agreement that accrued to the entity while an Affiliate shall survive until fulfilled even though the entity no longer qualifies as an 
Affiliate.

1.2

“Change Of Control” means: (a) any consolidation, merger, combination, reorganization or other transaction in 
which Licensee is not the surviving entity, other than a transaction with the principal purpose of effecting a change in domicile or 
the legal entity status of Licensee; (b) Equity Interests of Licensee constituting more than 50% of the voting power of Licensee 
are  exchanged  for  or  changed  into  other  Equity  Interests,  cash,  and/or  any  other  property,  whether  through  one  or  a  series  of 
transactions; (c) a sale or other disposition of all or substantially all of the assets of the Licensee; or (d) the assignment or transfer 
of this Agreement to a third party.

1.3

“Combination  Product”  means  a  Licensed  Product  that  is  comprised  of  at  least  one  other  active  ingredient, 

which is not a Licensed Product (regardless of whether co-formulated, co-packaged or otherwise administered).

1.4

“Confidential  Information”  means  information  or  material  disclosed  by  one  party  (“disclosing  party”)  to  the 
other party (“receiving party”) that is marked as confidential at the time of disclosure or, if first disclosed orally or observed, is 
identified as confidential at the time of 

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disclosure and summarized in a marked writing delivered to receiving party within [**] after first oral disclosure. Confidential 
Information  does  not  include  information  or  material  that:  (a)  is  in  the  public  domain  other  than  through  acts  or  omissions  of 
receiving party, or anyone that accessed the Confidential Information from receiving party; (b) is already known at the time of 
disclosure  as  shown  by  competent  evidence;  (c)  is  independently  developed  by  the  receiving  party  without  knowledge  of  the 
Confidential Information, as shown by contemporaneously written records; or (d) is lawfully disclosed to receiving party by a 
third party without restriction.

1.5

“Development Plan” means the preliminary written plan summarizing the development activities that are to be 
undertaken by the Licensee to bring Licensed Products to the market that is attached as Appendix B, which may be updated from 
time to time by Licensee.

1.6

“Development  Report”  means  a  written  report  summarizing  Licensee’s  material  technical  and  other  efforts
made towards achieving first commercial sale for all Licensed Products under development). Such reports shall include, without 
limitation,  reasonably  detailed  summaries  of  information  describing  [**].  A  Development  Report  should  include  at  least  the 
information specified on Appendix C.

1.7

“Equity Interests” means equity securities or membership units of an entity or securities or membership units 

that are convertible into the entity’s equity securities or membership units.

1.8

“Investigator” means any of [**].

1.9

“Know-How”  means information  and  materials  existing  as  of  the  Effective  Date,  to  the  extent wholly owned 
and controlled by UFRF that is necessary or useful, to practice and/or commercialize the Patent Rights and is, generated by the 
Investigator  or  those  working  under  the  Investigator’s  direction,  including  the  processes,  techniques,  data,  and  materials 
identified on Appendix A, attached and incorporated herein. If Know-How is provided in the form of: (a) tangible materials, then 
all progeny and derivatives of the materials made by or on behalf of Licensee or Sublicensee are included within this definition of 
Know-How; and/or (b) software or other copyrightable work, then all derivative works made by or on behalf of Licensee or any 
Sublicensee are included within this definition of Know-How.

1.10

“Licensed  Field”  means  all  diagnostic,  prophylactic,  and  therapeutic  uses  for  cardiomyopathy,  skeletal 
myopathy, liver targeted gene therapy, and Friedreich’s Ataxia, using adeno-associated virus gene therapy. For clarity, Licensed 
Field excludes Patent Rights for [**].

1.11

“Licensed Product” means any Product or Process or Know-How that is:

product is made, used, imported or sold;

(a)

is covered in whole or in part by a Valid Claim in the Patent Rights in any country in which the 

the Patent Rights in any country in which any the process is used or in which the product is used, imported or sold; or

(b)

is manufactured by using a process which is covered in whole or in part by a Valid Claim in 

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Know-How or using a process that is developed using Know-How.

(c)

incorporates, utilizes, or was developed utilizing Know-How or which is manufactured using 

that is the subject of Market Exclusivity based in whole or in part: (i) on a product or process 
that was at any time within the scope of any of sections (a), (b), or (c); or (ii) on the practice of the Patent Rights and/or the use of 
the Know-How at any time.

(d)

1.12

“Licensed Territory” means worldwide.

1.13

“Market Exclusivity” means, with respect to a Licensed Product, the exclusivity granted by FDA, pursuant to 
Section 351(k)(7) of the Public Health Services Act, entitled “Exclusivity for Reference Product,” and any non-United States law 
equivalents.

1.14

“Net Sales”  means  the  total  dollar  amount  invoiced  on  sales  of  Licensed  Products  less  deductions  accrued  in 
accordance with GAAP any charges where applicable and separately listed for (i) sales taxes or use taxes (except for value-added 
taxes capable of reimbursement and income taxes imposed on the sales of Licensed Product in foreign countries), tariffs, duties or 
customs  (all  separately  stated  on  the  invoice),  (ii)  prepaid  outbound  shipping  and  insurance  charges,  (iii)  deductions  for 
allowances given for returned or defective goods that do not exceed the original invoice amount, (iv) trade discounts given, not to 
exceed  the  original  invoice  amount,  (v)  charge  back  payments  and  rebates  given  for  the  Licensed  Product  to  (a)  managed 
healthcare  organizations,  (b)  federal,  state,  provincial  and/or  local  governments  or  other  governmental  agencies,  and  (c) 
purchasers  and  reimbursers.  Licensed  Products  will  be  considered  sold  when  paid  for;  provided,  however,  that  with  respect  to 
Licensed  Products  transferred  by  Licensee  to  its  Sublicensee  or  Affiliate  in  the  circumstances  described  in  item  (x)  in  the 
immediately  following  sentence,  any  such  Licensed  Products  will  be  considered  sold  when  they  are  transferred  to  any  such 
Sublicensee or Affiliate. For the purpose of calculating Net Sales, transfers by Licensee to its Sublicensee or Affiliate of Licensed 
Product under this Agreement for (x) end use (but not resale) by the Sublicensee or Affiliate shall be treated as sales by Licensee 
at  the  average  amount  invoiced  by  Licensee  to  third  parties  during  such  Net  Sales  calculation  period  or  (y)  resale  by  a 
Sublicensee  or  an  Affiliate  shall  be  treated  as  sales  at  the  average  amount  invoiced  by  such  Sublicensee  or  Affiliate  to  third 
parties during such Net Sales calculation period, in each case subject in all respects to the deductions under this Section 1.12. 
Notwithstanding the foregoing, a sale of a Licensed Product to a distributor, which is not a Sublicensee or Affiliate, in an arm’s-
length  transaction,  shall  be  treated  as  a  sale  if  Licensee  receives  no  further  compensation  for  that  Licensed  Product  from  any 
subsequent purchaser of that Licensed Product. Notwithstanding the foregoing, when sold separately, Net Sales shall not include, 
and  shall  be  deemed  zero  with  respect  to,  (aa)  the  distribution  of  reasonable  quantities  of  promotional  samples  of  Licensed 
Products,  or  (bb)  the  transfer  of  Licensed  Product  to  a  third  party  to  use  Licensed  Product  for  the  sole  purpose  of  performing 
preclinical or clinical studies or (cc) the transfer of Licensed Product to a third party solely for charitable or compassionate use 
purposes if Licensee transfers Licensed Product at cost of goods or below.

In  the  event  that  a  Product  is  sold  as  a  Combination  Product,  Net  Sales,  for  the  purposes  of  determining  royalty 
payments on the Combination Product, shall mean the gross amount collected for the Combination Product less the deductions 
set forth in clauses (i) - (vi) above, multiplied by a proration factor that is determined as follows:

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(A)

If  all  active  ingredients  of  the  Combination  Product  were  sold  separately 
during the same or immediately preceding calendar quarter, the proration factor shall be determined by the formula [A / (A+B)], 
where A is the average gross sales price of all Product components (as applicable) during such period when sold separately from 
the other component(s), and B is the average gross sales price of the other component(s) during such period when sold separately 
from the Product components (as applicable); or

If  any  active  ingredients  of  the  Combination  Product  were  not  sold  or 
provided separately during the same or immediately preceding calendar quarter, the proration factor shall be determined by the 
Parties in good faith negotiations based on the relative value contributed by each active ingredient.

(B)

1.15

“Patent Challenge” means a challenge to the validity, patentability, or enforceability of any of the Patent Rights 

or otherwise opposing any of the Patent Rights.

1.16

“Patent Rights” means:

(a)

(b)

the patent(s)/patent application(s) identified on Appendix A;

all United States and foreign patent applications claiming priority to any of the patent(s) and 

patent application(s) identified in Appendix A; and

all patents issuing from the patent applications identified in Subsections 1.16(a) and 1.16(b), 
including,  letters  patent,  patents  of  addition,  continuations,  divisionals,  reissues,  reexaminations,  extensions,  restorations,  and 
supplementary protection certificates.]

(c)

1.17

“Sublicense” means the agreement to grant or agree not to assert any right licensed to Licensee under Section 
2.4, including, any agreement that permits any use of all or part of the Patent Rights or Know-How for research, development, or 
the  manufacture,  marketing,  distribution,  commercialization,  sale,  offer  for  sale,  import  or  export  of  Licensed  Products.  An 
agreement that is described in this definition is a Sublicense whether or not it is called a “sublicense” and whether or not it is 
included in a stand-alone document or is part of a broader collaboration, development, or joint venture agreement or arrangement. 
Notwithstanding  the  foregoing,  grants  by  Licensee  of  the  rights  under  Section  2.4  pursuant  to  ordinary  course  operating 
agreements of Licensee, such as agreements to contract manufacturing organizations, contract research organizations, and clinical 
trial sites, shall not be deemed to be a Sublicense.

1.18

“Sublicensee” means any third party to whom Licensee grants a Sublicense.

1.19

“Sublicensing Revenue”  means  any  and  all  consideration  under  or  otherwise  in  connection  with  a  Sublicense 
received by Licensee,  including  license  issue  fees,  lump  sum  payments,  milestone payments, maintenance fees, profit sharing, 
joint marketing fee, equity or other payments of any kind whatsoever, irrespective of whether such consideration is received in 
the form of cash, offsets, barter, credit, stock, warrants, release from debt, goods or services, licenses back, a payment for equity 
that  exceeds  the  pre-Sublicense  fair  market  value  by  more  than  [**]%  of  the  equity,  equity  exchanges,  or  any  other  form 
whatever, excluding: (a) royalties paid to UFRF based on Net Sales by the Sublicensee; and (b) if accompanied by competent 
documentary evidence: (i) reimbursement of the direct costs of bona fide future research and 

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development of a Licensed Product (and not other products); and (ii) for any payment based on the same event that triggers a 
milestone  payment  to  UFRF  under  Section  4.5  ,  the  amount  due  to  UFRF  for  the  corresponding  milestone  under  Section  4.5, 
provided  that,  for  avoidance  of  doubt,  the  amount  excluded  shall  not  be  greater  than  the  corresponding  payment  required  in 
Section 4.5.

1.20

“Royalty Report” means a certified written report (Appendix D), by country, showing how any amounts payable 
to  UFRF  on  amounts  of  Net  Sales  have  been  calculated  and  detailing  the  number,  description,  aggregate  selling  prices,  all 
necessary tax filings, but only to the extent required to verify reductions taken related to foreign tax credits, and information to 
verify deductions from Net Sales (and a listing of the pertinent Patent Rights where the Licensed Product is composed of a subset 
of  the  Patent  Rights)  sold  or  otherwise  disposed  of  in  each  calendar  quarter  upon  which  royalty  is  payable  and  the  royalty 
payment amount due under Section 4.3 and 4.4

1.21

Valid Claim means a claim (i) of any issued, unexpired patent that has not been revoked or held unenforceable 
or invalid by a decision of a court or Governmental Authority of competent jurisdiction from which no appeal can be taken, or 
with respect to which an appeal is not taken within the time allowed for appeal, and that has not been disclaimed or admitted to 
be invalid or unenforceable through reissue, disclaimer or otherwise, or (ii) of any pending patent application the earliest priority 
date of which claim is less than [**], that has not been irrevocably cancelled, withdrawn or abandoned. For clarity, if a pending 
claim issues and meets the requirements of this Section 1.21, it is a Valid Claim regardless of the amount of time such claim was 
pending.

Section 2.Grant

2.1

Patent Rights. In return for the royalties and other payments described in Section 4, UFRF grants to Licensee a 
royalty-bearing,  limited  term,  exclusive  license  with  the  right  to  grant  Sublicenses  through  multiple  tiers  to  Patent  Rights  and 
Know-How in the Licensed Field and Licensed Territory to make, have made, use, sell, have sold, import, and export Licensed 
Products.

2.2

Know-How.  In  return  for  the  royalties  and  other  payments  described  in  Section  4,  UFRF  grants  to  License  a 
royalty-bearing, non-exclusive license under the Know-How in the Licensed Field and Licensed Territory to make, have made, 
use, sell, have sold, import, and export Licensed Products and Licensed Processes

2.3

Improvements

(a)

Licensee shall be notified in writing when UFRF receives any written invention disclosure of 
any  new  invention  or  discovery  that  lists  (i)  Investigator  as  an  inventor  and  (ii)  Licensee  as  a  source  of  funding 
(“Improvements”).  If,  within  [**]  thereafter,  Licensee  notifies  UFRF  in  writing  that  it  wishes  to  obtain  a  license  to  such 
Improvements. In such event, this Agreement shall be amended to add such Improvements to the Patent Rights or Know-How, as 
appropriate.  The  Parties  shall  negotiate  in  good  faith  a  reasonable,  additional  license  issuance  fee,  which  shall  be  the  only 
additional  financial  obligation  of  Licensee  resulting  from  the  exercise  of  the  option  with  respect  to  such  Improvement  and  all 
other terms of the Agreement shall remain in force and apply.

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(b)

In addition, UFRF shall use good faith efforts to notify Licensee after it becomes aware of any 
other new written invention disclosure with Investigator as an inventor that directly relates to Licensed Products in the Licensed 
Field that is not an Improvement; provided, however, that UFRF’s failure to do so shall not constitute a breach of this Agreement. 
Upon receipt of any such notification, Licensee shall have the rights with respect to such invention as set forth for Improvements 
as set forth in clause (a) above.

2.4

Sublicense Rights.

(a)

Licensee  shall  advise  UFRF  of  material  negotiations  for  sublicenses  with  third  parties  that 
Licensee  believes  are  reasonably  likely  to  lead  to  a  Sublicense;  provided,  that  in  no  event  shall  Licensee  be  required  by  this 
sentence to violate the terms of any confidentiality or similar agreement or arrangement with a potential sublicensee. Licensee 
may grant written Sublicenses to third parties only if Licensee is in compliance with the diligence obligations in Section 3 or is 
selling  Licensed  Products.  Any  agreement  granting  a  Sublicense  shall  state  that  the  Sublicense  is  subject  to  the  terms  of  this 
Agreement, including with respect to termination. Licensee has the same responsibility for the activities of any Sublicensee under 
any  Sublicense  as  if  the  activities  were  directly  those  of  Licensee.  Licensee  shall  also  include  provisions  in  all  Sublicenses  to 
provide that in the event Sublicensee or its Affiliate brings a Patent Challenge against UFRF or assists another party in bringing a 
Patent Challenge against UFRF (except as required under a court order or subpoena) then Licensee may terminate the Sublicense 
within [**]. For clarity, additional tiers of sublicense may be made by a Sublicensee, and any such additional sublicense shall 
include provisions that such sublicense shall adhere to the provisions of this Section 2.4(a).

(b)

Licensee  shall  provide  UFRF  with  a  final  un-redacted  copy  of  each  Sublicense  within  [**] 
after execution and forward to UFRF [**] a copy of reports received by Licensee from its Sublicensees regarding development of 
Licensed Products and payments under the Sublicense agreements. Failure of Licensee to provide UFRF with un-redacted copies 
of  each  Sublicense  agreement  within  [**]  after  execution  of  the  Sublicense  agreement  is  a  material  breach  of  this  Agreement. 
Notwithstanding  the  foregoing,  Licensee  may  redact  from  each  Sublicense  the  confidential  and  proprietary  information  of  the 
Sublicensee that is not relevant to the Licensed Patents or Licensed Know-How.

2.5

Patent Challenge. If Licensee or any of its Affiliates brings a Patent Challenge against UFRF, or Licensee or any 
of  its  Affiliates  assists  another  party  in  bringing  a  Patent  Challenge  against  UFRF  (except  as  required  under  a  court  order  or 
subpoena),  and  UFRF  does  not  terminate  this  Agreement  pursuant  to  Section  9.4,  then,  if  the  Patent  Challenge  is  successful, 
Licensee  may  not  recoup  any  consideration,  including  royalties,  paid  to  UFRF  during  the  period  of  challenge.  If  a  Patent 
Challenge  is  unsuccessful,  Licensee  shall  reimburse  UFRF  for  all  reasonable  legal  fees  and  expenses  incurred  in  its  defense 
against the Patent Challenge.

2.6

Retained Rights. UFRF reserves to itself and the University of Florida the right to practice the Patent Rights and 
Know-How for their internal non-commercial research including research sponsored by commercial entities, clinical (including, 
but  not  limited  to  patient  care  at  Shands  Teaching  Hospital  and  University  of  Florida  patient  care  facilities),  and  educational 
purposes. In addition, UFRF reserves to itself, as well as to the University of Florida and to all 

7

 
non-profit research institutions the right to use materials that are covered under Patent Rights and Know-How for their internal 
non-commercial research and educational purposes and for all applicable governmental requirements and guidelines governing 
the ability to transfer materials. For clarity, the rights reserved by UFRF do not include the ability to use materials covered under 
Patent Rights and Know-How for conduct of sponsored commercial research for a third party, without the prior written consent of 
Licensee, which shall not unreasonably be withheld. In addition, UFRF agrees that any material or data transferred to a non-profit 
research institution pursuant to the retained rights shall be transferred pursuant to a Material Transfer Agreement or Data Transfer 
Agreement confirming that the materials and/or data are transferred solely for noncommercial, research and educational uses.

2.7

Un-Addressed  Markets  or  Territories.  If  prior  to  [**]  of  a  Licensed  Product  by  Licensee,  an  Affiliate  or  any 
Sublicensee,  UFRF  notifies  Licensee,  in  writing,  of  a  third  party’s  good  faith  interest  in  developing  Licensed  Products  for  a 
specific indication or for one or more specific countries, which Licensee is not currently addressing and does not have plans to 
address (an “Undeveloped Indication/Region”), UFRF may request that Licensee to negotiate, in good faith, a Sublicense with 
such third party, consistent with the terms of this Agreement, and otherwise on commercially reasonable terms; provided, that 
such third party has the reasonable ability to develop a Licensed Product for such Undeveloped Indication/Region. Licensee will 
have [**] to negotiate a Sublicense with the third party, in accordance with the preceding sentence. Alternatively, Licensee may 
propose  to  UFRF  within  [**]  of  referral,  Licensee’s  product  development  plans  for  such  market  or  territory.  If,  thereafter, 
Licensee commences those product development plan within [**] of the referral date, then Licensee shall retain all rights with 
respect to such market or territory and shall not be obligated to negotiate a Sublicense with the third party. If Licensee has not 
executed  a  Sublicense  with  the  third  party  on  the  terms  set  forth  in  this  Section  2.7,  nor  has  provided  a  revised  product 
development plan and commenced such product development plan within the period set forth above, then Licensee’s rights to the 
Patent Rights in the unaddressed market or territory shall cease upon [**] prior written notice to Licensee, and UFRF may offer 
those rights to the third party. Should UFRF offer those rights to a third party, UFRF shall notify Licensee.

2.8

Minimum Investment.

Company shall receive at least [**] dollars ($[**]) in funding (which may include external equity investment as well as 

grants) within [**] of the Effective Date or UFRF shall, as its sole and exclusive remedy, have the right to terminate the License.

Section 3.Diligence Obligations

3.1

Development. Licensee agrees and warrants that:

Patent Rights and Know-How;

(a)

it  has  or  will  obtain  the  expertise  necessary  to  evaluate  independently  the  inventions  of  the 

it will provide to UFRF a [**] Development Plan respecting exploitation of the Patent Rights 
(Appendix B) to the end that inventions of the Patent Rights and Know-How will be utilized to provide Licensed Products for 
sale in the retail market within the Licensed Field;

(b)

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(c)

(d)

it will use commercially reasonable efforts to develop markets for Licensed Products;

until the date of first commercial sale of Licensed Products, it will supply UFRF with a written 

Development Report [**] after the end of each [**];

States law, 35 U.S.C. §287, including virtual patent marking (at Licensee’s discretion) with respect to all Licensed Products; and

(e)

Licensee and Sublicensee(s) shall apply patent markings that meet all requirements of United 

at  least  [**]  before  a  reasonably  estimated  date  for  the  commencement  of  manufacturing  of 
commercial  production  of  Licensed  Products,  Licensee  will  include  in  the  Development  Report  a  summary  of  the  material 
activities planned for commercial manufacturing.

(f)

3.2

First Commercial Sale; Milestones.

forth in Exhibit B, and estimates that the first commercial sale of the first Licensed Product will occur on or before [**].

(a)

Licensee  shall  use  Commercially  Reasonable  Efforts  to  achieve  the  estimated  milestones  set 

(b)

If Licensee requests an extension of any milestones, UFRF shall consider the requests in good 
faith. Licensee shall make extension requests in writing at least [**] prior to the required due dates, fully describing Licensee’s 
diligent  efforts  to  achieve  the  milestone.  Upon  granting  extension  requests,  UFRF  and  Licensee  shall  negotiate  the  terms  of 
extensions in good faith.

3.3

Clinical  Trials.  University  of  Florida  policies  may  require  approval  of  clinical  trials  involving  technology 
invented at the University. Accordingly, Licensee will notify UFRF prior to commencing any clinical trials at the University of 
Florida or its affiliated medical facilities with Licensee Products.

Section 4.Payments

4.1

License Issue Fee. Licensee shall pay to UFRF a non-refundable license issue fee of [**] dollars ($ [**]) within 

[**] of the Effective Date.

4.2

Annual License Maintenance Fee. Licensee shall pay an annual license maintenance fee of $[**] each year on 
the anniversary of the Effective Date of this Agreement. The annual license maintenance fee is payable until the first commercial 
sale of a Licensed Product, after which time minimum royalties instead of the annual license maintenance fee are due.

4.3

Royalty on Licensed Products.

Licensee shall pay UFRF, on a country-by-country basis, the following earned royalties:

(I)  For all Licensed Products that qualify under Sections 1.10(a), (b), or (d):

9

 
of Net Sales,

(a)

(b)

$[**] and up to $[**], or

[**] percent ([**]%) of Annual Net Sales of Licensed Product(s) in Licensed Field up to $[**] 

[**]  percent  ([**]%)  of  Annual  Net  Sales  of  Licensed  Product(s)  in  Licensed  Field  above 

$[**] of Net Sales; and 

(c)

[**]  percent  ([**]%)  of  Annual  Net  Sales  of  Licensed  Product(s)  in  Licensed  Field  above 

(II)  for all Licensed Products that qualify only under Sections 1.10(c) but not any of Sections 1.10(a), (b), or (d):

$[**], or

(d)

(e)

(f)

[**]% of Net Annual Sales of Licensed Product(s) in Licensed Field up to $[**] of Net Sales,

[**]%  of  Net  Annual  Sales  of  Licensed  Product(s)  in  Licensed  Field  above  $[**]  and  up  to 

[**]% of Net Annual Sales of Licensed Product(s) in Licensed Field above $[**] of Net Sales.

Earned royalties are earned as of the earlier of the date the Licensed Product is actually sold and paid for and the date an 
invoice  is  sent  by  Licensee  or  its  Sublicensee(s),  or  as  of  the  date  a  Licensed  Product  is  transferred  to  a  third  party  for 
promotional reasons.

Within [**] after the end of each calendar quarter ending on March 31, June 30, September 30 or December 31, Licensee 
shall pay amounts owing to UFRF under this Section 4.3 after the amount of minimum royalties paid pursuant to Section 4.4 is 
exceeded.  Royalties  are  not  additive,  but  are  payable  based  on  the  highest  applicable  rate  that  is  calculated  according  to  this 
Section 4.3.

4.4

Minimum Royalty.

pay UFRF minimum royalty payments as follows.

(a)

Beginning in the calendar year of first commercial sale of a Licensed Product, Licensee shall 

Payment
[**]
[**]
[**]
[**]
[**]

Year
[**]
[**]
[**]
[**]
[**]

(b)

The first annual minimum royalty payment of $[**] is due by December 31 of the year of first 
commercial sale and shall be prorated according to date of first commercial sale. The Licensee shall pay the minimum royalty in 
advance  on  a  quarterly  basis  on  March  31,  June  30,  September  30,  and  December  31  for  each  year  during  the  term  of  this 
Agreement. Minimum royalties apply to earned royalties on a calendar year basis; Net Sales that are made during a prior 

10

 
 
or subsequent calendar year have no effect on the annual minimum royalty due to UFRF for other than the same calendar year in 
which the royalties were earned.

4.5

Milestone Payments.

milestone for each Licensed Product, as follows:

(a)

Licensee  shall  pay  UFRF  milestone  payments  within  [**]  of  the  first  achievement  of  each 

Event

Milestone Payment

[**]
[**]
[**]
[**]
[**]

[**]
[**]
[**]
[**]
[**]

Each milestone payment shall only be owed once with respect to each Licensed Product.

4.6

Change of Control.

Licensee shall pay to UFRF a fee of $[**] upon the first Change of Control of Licensee. Licensee shall notify UFRF and 

pay the Change of Control fee within [**] of the occurrence of a Change of Control.

4.7

Issuance of Equity.

(a)

As further consideration for the rights granted to Licensee by this Agreement, Licensee shall 
issue to UFRF an amount of equity securities or membership units of Licensee equal to [**] percent ([**]%) of the total amount 
of issued and outstanding equity securities or membership units of Licensee or securities or membership units that are convertible
into Licensee’s equity securities or membership units (collectively, “Equity Interests”) on the Effective Date.

(b)

If  at  any  time  after  the  Effective  Date  and  before  Licensee  receives  a  total  of  [**]  dollars 
($[**]) cash in exchange for the issuance of Licensee’s Equity Interests, Licensee issues any Equity Interests, then Licensee shall 
issue  additional  Equity  Interests  to  UFRF  such  that  the  total  amount  of  Equity  Interests  issued  to  UFRF  remains  [**]  percent 
([**]%) of the total number of issued and outstanding Equity Interests of Licensee calculated on a Fully Diluted Basis. “Fully 
Diluted  Basis”  means  assuming  the  conversion  of  all  outstanding  convertible  securities  and  the  exercise  of  all  outstanding 
options, warrants and other similar securities, regardless of whether such securities, options or warrants are then convertible or 
exercisable.

(c)

If  Licensee  engages  in  an  offering  to  sell  any  Equity  Interests,  UFRF  and/or  any  entity  to 
which UFRF has assigned the right to exercise UFRF’s participation rights may purchase [**]% of the Equity Interests that are 
issued in that offering on the same terms that are offered to the other purchasers in that offering. UFRF shall exercise its right to 
purchase equity interest under this Subsection (c) in writing, within [**] of receiving notice of the offering from 

11

 
 
the Company. If no such exercise notice from UFRF is received, then the right shall be deemed waived. This Subsection (c) shall 
terminate on the [**] of the Effective Date.

Licensee  shall  issue  Equity  Interests  to  UFRF  under  this  Section  4.6  in  accordance  with  the 
Equity  Agreement  or  Operating  Agreement  between  UFRF  and  Licensee.  UFRF  shall  enter  into  customary  venture  capital 
financing documents with respect to its Equity Interests if requested by the Company.

(d)

4.8

Sublicense Fees.

With  respect  to  Sublicenses  granted  by  Licensee  under  Section  2.4(a),  Licensee  shall  pay  to 
UFRF  an  amount  equal  that  Licensee  would  have  been  required  to  pay  under  Section  4.3  had  Licensee  sold  the  Licensed 
Products that are sold by a Sublicensee.

(a)

(b)

If Company receives any consideration such as fees, minimum royalties, milestone payments 
or other payments pursuant to sublicense of the Patent Rights and Know-How, and such payments are not running royalties based
on Net Sales, then Company shall pay UFRF [**] percent ([**]%) of such consideration within [**] of receipt. Royalties from 
Sublicenses will pass through to UFRF at the same Royalty rate as is specified in this term sheet. For clarity, Sublicense Fees 
shall exclude (the “Excluded Amounts”): amounts received in connection with financing events, capital investments (debt and/or 
equity), assignments (and not as a consequence of restructuring or other corporate organizing or merger or sale of Company or 
any  business  or  assets  or  similar  transaction),  acquisition  of  Company,  payments/reimbursements  for  R&D  and  other  out-of-
pocket expenses incurred with respect to the Patent Rights or Licensed Products, distribution, service contracts, regulatory trials 
and  joint development  efforts.  For  clarity,  such  exclusions  may  be  part  of  a  larger transaction in which a sublicense under the 
Patent  Rights  is  granted,  provided  that  such  transactions  will  also  contemplate  significant  future  milestones,  royalties  or  other 
income that would be considered Sublicense Payments.

Licensee  may  not  receive  from  Sublicensees  anything  of  value  in  lieu  of  cash  payments  in  consideration  for  any 
Sublicense under this Agreement other than the Excluded Amount without the express prior written consent of UFRF, not to be 
unreasonably withheld, conditioned or delayed.

4.9

Royalty Stacking.

Only one royalty will be due on Net Sales of any Licensed Product, even if such Licensed Product is covered by multiple 

patents, patent applications or claims within the Patent Rights.

(a)

During the Term, in the event Licensee reasonably determines that it is necessary to obtain a 
license  or  licenses  under  any  patent  from  any  third  party  or  third  parties  in  order  to  exploit  Licensed  Products  in  a  particular 
country  (each,  a  “Third Party License”),  then  in  each  calendar  quarter  during  which  royalties  are  payable  to  UFRF  under  this 
Agreement  in  respect  of  Net  Sales  of  a  Licensed  Product  or  a  Licensed  Process  in  such  country,  Licensee  shall  be  entitled  to 
deduct  from  the  royalty  paid  to  UFRF  for  such  country  a  maximum  of  [**]  percent  ([**]%)  of  the  royalties  actually  paid  by 
Licensee under each such Third Party License(s) in that calendar quarter on account of sales of that Licensed Product or Licensed 
Process in such country.

12

 
(b)

Additional  Patents.  During  the  Term,  in  the  event  Licensee  enters  into  a  license  agreement 
with  UFRF  to  an  Additional  Patent,  then  in  each  calendar  quarter  during  which  royalties  are  payable  to  Licensor  under  this 
Agreement  in  respect  of  Net  Sales  of  a  Licensed  Product  or  a  Licensed  Process  in  such  country,  Licensee  shall  be  entitled  to 
deduct from the royalty paid to Licensor for such country a maximum of [**] percent ([**]%) of the royalties actually paid by 
Licensee to UFRF under each such license agreement with UFRF to an Additional Patent in that calendar quarter on account of 
sales of that Licensed Product or Licensed Process in such country.

In no event will the earned royalty payable to UFRF for Net Sales be lower than [**] the rate specified in Section 4.3(a).

4.10

Overlap with Agreement A19111.

In the event that a Licensed Product is also covered by agreement A19111 (Appendix E) then only one payment is due 

under each of sections 4.3, 4.4, and/or 4.5.

There shall only be one payment due based on a Change in Control pursuant to Section 4.6, under this Agreement and 
under  Agreement  A19111.  Likewise  the  equity  provisions  of  Sections  4.6(a)-4.6(d)  shall  apply  only  once  (to  either  this 
Agreement A19111 or Agreement A19110).

Section 5.Warranties and Disclaimers of UFRF

5.1

UFRF represents that its employees have assigned or are obligated to assign to UFRF their entire right, title, and 
interest in the Patent Rights and Know-How and that it has authority to grant the rights and licenses set forth in this Agreement. 
However, nothing in this Agreement is:

Patent Rights;

(a)

(b)

a  warranty  or  representation  by  UFRF  of  the  validity  or  scope  of  any  right  included  in  the 

a warranty or representation that anything made, used, sold or otherwise disposed of under the 

license granted in this Agreement does not infringe patents or other rights of third parties;

Patent Rights;

(c)

(d)

an  obligation  to  bring  or  prosecute  actions  or  suits  against  third  parties  for  infringement  of 

an obligation to furnish know-how or services other than those specified in this Agreement; or

a warranty or representation by UFRF that it will not grant licenses to others to make, use or 
sell products not covered by the claims of the Patent Rights which may be similar or compete with products made or sold by 
Licensee.

(e)

5.2

EXCEPT  AS  OTHERWISE  EXPRESSLY  SET  FORTH  IN  THIS  AGREEMENT,  UFRF  MAKES  NO 
REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING 
BUT NOT LIMITED TO 

13

 
WARRANTIES  OF  MERCHANTABILITY,  FITNESS  FOR  A  PARTICULAR  PURPOSE,  AND  VALIDITY  OF  PATENT 
RIGHTS CLAIMS, ISSUED OR PENDING. UFRF ASSUMES NO RESPONSIBILITIES WHATSOEVER WITH RESPECT 
TO  USE,  SALE,  OR  OTHER  DISPOSITION  BY  LICENSEE,  ITS  SUBLICENSEE(S),  OR  THEIR  VENDEES  OR  OTHER 
TRANSFEREES  OF  PRODUCTS  INCORPORATING  OR  MADE  BY  USE  OF  INVENTIONS  LICENSED  UNDER  THIS 
AGREEMENT.

Section 6.Record Keeping; Accounting

6.1

Licensee  and  its  Sublicensee(s)  shall  keep  books  and  records  sufficiently  to  verify  the  accuracy  and 
completeness  of  Licensee’s  and  its  Sublicensee(s)’s  accounting,  including  without  limitation,  inventory,  purchase  and  invoice 
records,  manufacturing  records,  sales  analysis,  general  ledgers,  financial  statements,  and  tax  returns  relating  to  the  Licensed 
Products.  Licensee  and  its  Sublicensee(s)  shall  preserve  these  books  and  records  for  at  least  [**]  after  they  are  created  or  as 
required by federal law, both during and after the term of this Agreement.

6.2

Licensee  and  its  Sublicensee(s)  shall  take  all  steps  necessary  so  that  UFRF  may,  within  [**]  of  its  written 
request,  audit,  reasonably  review  and  copy  all  of  Licensee’s  books  and  records  at  a  single  United  States  location  to  verify  the 
accuracy of Licensee’s and its Sublicensee(s)’s accounting. The review may be performed by any authorized employees of UFRF 
as well as by any attorneys or accountants designated by UFRF upon reasonable notice and during regular business hours. If a 
deficiency  with  regard  to  any  payment  is  determined,  Licensee  and  its  Sublicensee(s)  shall  pay  the  deficiency  along  with 
applicable interest as described in Subsection 6.4(a) within [**] of receiving notice. If a payment deficiency for a calendar year 
exceeds [**] percent ([**]%) of amounts paid for that year, then Licensee or its Sublicensee(s) shall pay UFRF’s out-of-pocket 
expenses incurred with respect to the review.

6.3

At any time during the term of this agreement UFRF may request in writing that Licensee verify the calculation 
of any past payments owed to UFRF through the means of a self-audit. No request may be made more than [**] with respect to 
the same period. Within [**] of the request, Licensee shall complete a self-audit of its books and records to verify the accuracy 
and completeness of the payments owed. Within [**] of the completion of the self-audit, Licensee shall submit to UFRF a report 
detailing the findings of the self-audit and the manner in which it was conducted in order to verify the accuracy and completeness 
of the payments owed. If Licensee has determined through its self-audit that there is any payment deficiency, Licensee shall pay 
UFRF the deficiency along with applicable interest under Subsection 6.4(a) with the submission of the self-audit report to UFRF.

6.4

Accounting for Payments.

(a)

Any amounts which remain unpaid after the date they are due to UFRF under this Section 6, 
Section 7 or any other provision of this agreement accrue interest from the due date at the rate of [**]% per month. This interest 
provision is not a grant of permission for any payment delays. Licensee is responsible for repayment to UFRF of any reasonable 
attorney, collection agency, and other out-of-pocket expenses to collect overdue payments.

14

 
Agreement in United States dollars at the following address or by wire transfer:

(b)

Except  as  otherwise  directed,  Licensee  shall  pay  all  amounts  owing  to  UFRF  under  this 

University of Florida Research Foundation, Incorporated 
288 Grinter Hall, PO Box 115500 
Gainesville, Florida 32611-5500 
Attention: Business Manager 
For Wire Transfer Information: http://research.ufl.edu/ufrf/wiring.html 

The wire transfer link is also included at the bottom of all invoices for your accounting purposes.

Licensee shall convert all monies owing in currencies other than United States dollars at the rate shown in the Federal 

Reserve Noon Valuation - Value of Foreign Currencies on the day preceding the payment due date.

(c)

On  the  date  of  each  payment  to  UFRF,  Licensee  shall  submit  a  certified  full  accounting 
statement  showing  how  any  amounts  payable  to  UFRF  have  been  calculated.  In  addition  to  being  certified,  the  Licensee  shall 
include  on  all  accounting  statements  a  written  representation  signed  by  an  executive  officer  of  Licensee  that  states  that  the 
statements  are  true,  accurate,  and  fairly  represent  all  amounts  payable  to  UFRF  pursuant  to  this  Agreement.  Licensee  shall 
provide accounting on a per-country and product line, model or trade name basis and shall summarize them on the form shown in 
Appendix D Royalty Report.

UFRF.

(d)

If no payment is owed to UFRF, Licensee shall supply an accounting demonstrating that fact to 

(e)

Licensee shall make all payments due under this Agreement net of taxes, assessments, or other 
charges of any kind which may be imposed on UFRF by any government or political subdivision with respect to any amounts 
payable to UFRF pursuant to this Agreement. All taxes, assessments, or other charges shall be assumed by Licensee to the extent 
those  taxes  fall  within  the  scope  of  the  foregoing  sentence.  Licensee  is  responsible  for  all  wire/bank  fees  associated  with  all 
payments due to UFRF pursuant to this Agreement.

Section 7.Patent Prosecution

7.1

UFRF  shall  file,  prosecute,  and  maintain  the  Patent  Rights  using  counsel  of  its  choice.  UFRF  shall  provide 
Licensee  with  copies  of  all  documents  sent  to  and  received  from  the  United  States  Patent  and  Trademark  Office  and  foreign 
patent offices relating to Patent Rights. To the extent such documents are not otherwise publically available, Company agrees to 
keep such information confidential.

7.2

Licensee shall pay UFRF $ [**] dollars, within [**] of the Effective Date to reimburse expenses associated with 
preparation, filing, prosecution, issuance, maintenance, defense, and reporting of the Patent Rights prior to the Effective Date. 
(NOTE: the above referenced dollar amount in this Section 7.2 is subject to change, as UFRF may not have received all related 
patent prosecution expense invoices from the law firm at the time of license negotiation.)

15

 
7.3

UFRF  will  solicit  input  from  Licensee  regarding  (a)  actions  to  be  taken  in  connection  with  the  Licensed 
Patent(s), and (b) fees, annuities, costs and expenses to be incurred in connection therewith. UFRF will submit, or will cause to 
be  submitted  to  Licensee  all  correspondence  or  other  materials  related  to  the  preparation,  filing,  prosecution  (including 
interferences and oppositions), issuance, maintenance and reporting of the Patent Rights for Licensee’s review and comment prior 
to any filing or other submission thereof, and UFRF will give due consideration to comments provided by Licensee or Licensee’s 
counsel and shall reasonably incorporate the comments of Licensee or Licensee’s counsel. If Licensee fails to provide comments 
regarding actions to be taken, submissions or payment of fees, annuities, or other costs or expenses within [**] of the date of 
UFRF’s  submission  thereof  to  Licensee  then  UFRF  will  assume  Licensee  has  no  comments.  In  the  event  that  Licensee’s 
comments  or  proposed  strategy  is  in  conflict  with  the  comments  or  proposed  strategy  of  another  licensee  in  a  different  field, 
Licensee,  UFRF  and  the  other  licensee  shall  cooperate  to  determine  whether  a  mutually  agreeable  approach  (e.g.,  claim 
amendment,  argument  and/or  filing  strategy)  is  reasonably  feasible  and  if  such  an  approach  is  not  reasonably  feasible  shall 
cooperate to file one or more additional applications to allow Licensee and the other licensee to pursue their own independent, 
field-specific  claims  in  separate  application  free  of  conflict  from  one  another.  Each  licensee  shall  bear  the  sole  costs  for  such
field-specific  applications.  Licensee  shall  pay  all  costs  and  expenses  incurred  by  UFRF  related  to  the  preparation,  filing, 
prosecution  (including  interferences  and  oppositions),  issuance,  maintenance  and  reporting  of  the  Patent  Rights  that  were  not 
reimbursed pursuant to Section 7.2 within [**] of receipt of an invoice from UFRF.

7.4

Licensee  may  elect  upon  [**]  prior  written  notice  to  decline  to  reimburse  UFRF  for  patent  expenses  for  any 
Patent Right in any particular country or jurisdiction. In that case, the license granted to Licensee, with respect to those Patent 
Rights by this Agreement, terminates after the [**] in that country or jurisdiction.

Section 8.Infringement and Invalidity

8.1

Licensee  shall  inform  UFRF  promptly  in  writing  of  any  alleged  infringement  of  the  Patent  Rights  by  a  third 

party of which it is aware, and of any available evidence of the alleged infringement.

8.2

During the term of this Agreement, Licensee shall have the first right, but not the obligation to prosecute any 
infringement  of  the  Patent  Rights.  If  Licensee  does  not  prosecute  any  infringement  of  the  Patent  Rights,  then  UFRF  may 
prosecute  that  infringement  of  the  Patent  Rights  at  its  own  expense.  If  either  Party  prosecutes  any  infringement  of  the  Patent 
Rights, then the other Party agrees that the prosecuting Party may include the other Party as a co-plaintiff in any infringement suit 
without expense to the non-prosecuting Party.

8.4  If  a  declaratory  judgment  action  is  brought  against  UFRF  or  Licensee  by  a  third  party  alleging  invalidity,  
unpatentability,  unenforceability,  or  non-infringement  of  the  Patent  Rights,  Licensee,  at  its  option,  may  within  [**]  after 
commencement of the action take over the sole defense of the action at its own expense. If Licensee does not exercise this right 
and Licensee is the sole licensee of the Patent Rights, UFRF may be responsible for the sole defense of the action at Licensee’s 
sole expense, subject to Sections 8.5 and 8.6.

16

 
8.5

If Licensee undertakes the enforcement or defense of the Patent Rights by litigation, Licensee shall apply any 
recovery  of  damages  first  in  satisfaction  of  [**]  and  next  toward  [**].  Licensee  shall  treat  the  balance  remaining  from  any 
recovery as [**].

8.6

In any suit in which either party is involved to enforce or defend the Patent Rights pursuant to this Agreement, 
the other party shall, at the request and expense of the party initiating the suit, cooperate in all respects and, to the extent possible, 
have its employees testify when requested and make available relevant records, papers, information, samples, specimens, and the 
like.

8.7

If  Licensee  contests  the  validity  of  any  Patent  Rights,  unless  UFRF  terminates  this  Agreement  pursuant  to
Section 9.4, Licensee shall continue to pay royalties and make other payments pursuant to this Agreement with respect to that 
patent as if the contest were not underway until the patent is adjudicated invalid or unenforceable by a court of last resort.

Section 9.Term and Termination

9.1

The  term  of  this  Agreement  begins  on  the  Effective  Date  and  continues  on  a  Licensed  Product  by  Licensed 
Product basis until the later of (i) the last to expire Valid Claim covering the Licensed Product, or (ii) ten (10) years from the First 
Commercial Sale of such Licensed Product.

9.2

Licensee  may  terminate  this  Agreement  at  any  time  after  the  fifth  (5th)  anniversary  of  the  Effective  Date  by 
giving at least sixty (60) days’ prior written notice to UFRF. Licensee shall include a statement of the reasons for termination in 
the notice.

9.3

UFRF may terminate this Agreement by giving Licensee at least thirty (30) days’ written notice if Licensee:

(a)

Licensee ceases to use Commercially Reasonable Effort to carry on its business pertaining to 

Licensed Patents;

(b)

(c)

(d)

(e)

of Licensed Products;

(f)

(g)

is in material breach of this Agreement;

knowingly provides any false report required to be delivered under this Agreement;

goes into bankruptcy, liquidation or proposes having a receiver control any of its assets;

materially violates any laws or regulations applicable to the development or commercialization 

ceases to carry on its business pertaining to Patent Rights;

fails  for  more  than  [**]  calendar  consecutive  quarters  to  make  payments  of  earned  royalties 

under Sections 4.3 or 4.4 once those royalty payments have begun;

17

 
fails to provide UFRF with redacted copies of the Change Of Control documents within [**] of 
their execution. Termination under this Section 9.3 takes effect [**] after written notice by UFRF, unless Licensee remedies the 
non-compliance in that [**] period, or an alternative cure period or extension of time is mutually agreed upon by the parties.

(h)

9.4

If Licensee or any of its Affiliates brings a Patent Challenge against UFRF or assists others in bringing a Patent 
Challenge  against  UFRF  (except  as  required  under  a  court  order  or  subpoena),  then  UFRF  may  immediately  terminate  this 
Agreement. If a Sublicensee brings a Patent Challenge or assists another party in bringing a Patent Challenge (except as required 
under a court order or subpoena), then UFRF may send a written demand to Licensee to terminate the sublicense. If Licensee 
fails to terminate the Sublicense within [**] after UFRF’s demand, UFRF may immediately terminate this Agreement.

9.5

Termination  of  this  Agreement  for  any  reason  does  not  release  either  party  from  any  obligation  that  matured 
prior to the effective date of termination. Licensee remains obligated to provide an accounting for and to pay royalties earned. 
Licensee  may  prorate  any  minimum  royalties  that  are  due  as  of  the  date  of  termination  by  the  number  of  days  elapsed  in  the 
applicable calendar year. Licensee and its Sublicensees may, however, during the [**] after the effective date of termination, sell 
all  Licensed  Products  that  are  in  inventory  and  complete  and  sell  Licensed  Products  that  are  in  the  process  of  manufacture 
provided that Licensee provides an accounting for and pays all earned royalties and other payments that are due under the terms 
of the Agreement.

9.6

Upon termination of the Agreement for any reason, the following sections of the License Agreement remain in 

force as non-cancelable obligations pursuant to their terms:

•

•

•

•

•

•

Section 6  

Record Keeping; Accounting

Section 9.6 

Effect of Termination

Section 12 

Indemnification; Insurance

Section 13 

Use of Names

Section 14  Miscellaneous

Section 17 

Confidentiality

9.7

In the event of a termination of this Agreement, if there is a Sublicensee in good standing under its sublicense, 
UFRF  shall  assume  the  Sublicense  on  the  same  terms  and  conditions  therein,  solely  to  the  extent  of  the  Licensed  Patents  and 
Licensed  Know-How;  provided,  that  under  no  circumstances  shall  UFRF  be  required  to  perform  any  obligation  under  the 
Sublicense that exceeds any obligation under this Agreement.

9.8

Licensee shall deliver to UFRF, within [**] after the date of termination of this agreement, complete and un-
redacted  copies  of  all  documentation  prepared  for  or  submitted  for  all  regulatory  approvals  of  Licensed  Products,  except  that 
Licensee may redact confidential information of any third parties.

18

 
Section 10.Assignability

10.1

This Agreement may not be transferred or assigned by Licensee except with the prior written consent of UFRF 
and payment of the Change of Control fee in Section 4.6. Any attempted assignment in contravention of this Section 10.1 is void 
and constitutes a material breach of this Agreement. Notwithstanding the foregoing, Licensee may assign the Agreement and/or 
its rights and/or obligations hereunder, upon informing UFRF to an Affiliate or in the context of a merger of Change in Control or 
to a successor to all or substantially all of the business of Licensee to which this Agreement relates.

10.2

The  new  assignee  shall  assume  all  responsibilities  under  this  Agreement  and  agree  in  writing  to  UFRF  to  be 

bound by this Agreement.

Section 11.Dispute Resolution

11.1

Mandatory Procedures. Before either party intends to file a lawsuit against the other with respect to any matter 
in connection with this Agreement, except with regard to any payments made or due under this Agreement, it shall first comply 
with the procedures set forth in this Section 11, other than for injunctive relief to enforce the provisions of this Section 11.

(a)

When  a  party  intends  to  invoke  the  procedures  set  forth  in  this  Section  11,  it  shall  provide 
written notice to the other party. Within [**] after the date of that notice, senior representatives of the parties shall engage in good 
faith negotiations at a mutually convenient location to resolve the dispute. In the case of UFRF, that representative is the Director 
of Technology Licensing. In the case of License, that representative is the Head of Business Development or his/her designee.

If  the  parties  fail  to  meet  within  the  time  period  set  forth  in  Section  11(a)  or  if  either  party 
subsequently determines that negotiations between the representatives of the parties are at an impasse, the party declaring that the 
negotiations are at an impasse shall give notice to the other party stating with particularity the issues that remain in dispute.

(b)

Officer of the Licensee shall meet and engage in good faith negotiations at a mutually convenient location to resolve the dispute.

(c)

Not more than [**] after the notice of issues, the President of UFRF and the Chief Executive 

11.2

Failure to Resolve Dispute. If (a) any issue is not resolved at the meeting of the President and Chief Executive 
Officer within [**] after they first meet or (b) there is a dispute regarding payments made or due under this Agreement, either 
party may file appropriate administrative or judicial proceedings with respect to the issue in dispute. The parties agree to consider 
in good faith any proposals to address issues through alternative dispute resolution.

Section 12.Indemnification; Insurance

12.1

Licensee shall (and shall cause Sublicensees to), at all times during the term of this Agreement and thereafter, 
indemnify, defend and hold UFRF, the Florida Board of Governors, the University of Florida Board of Trustees, the University of 
Florida,  and  each  of  their  directors,  trustees,  officers,  employees,  and  agents,  the  Investigator,  and  the  inventors  of  the  Patent 
Rights, 

19

 
regardless of whether the inventors are employed by the University of Florida at the time of the claim, harmless against all claims 
and liabilities, including legal expenses and reasonable attorneys’ fees, from a third party claim, arising out of the death of or 
injury to any person or persons or out of any damage to property and against any other claim, proceeding, demand, expense and 
liability resulting from the development, production, manufacture, sale, use, lease, consumption, marketing, or advertisement of 
Licensed Products or arising from any right or obligation of Licensee under this Agreement. Notwithstanding the above, UFRF at 
all  times  reserves  the  right  to  retain  counsel  of  its  own  at  its  own  cost  to  defend  the  interests  of  UFRF,  the  Florida  Board  of 
Governors, the University of Florida Board of Trustees, the University of Florida, and the inventor(s).

12.2

Licensee warrants that it now maintains and will continue to maintain liability insurance coverage appropriate 
to  the  risk  involved  in  developing,  producing,  manufacturing,  conducting  clinical  trials  for,  selling,  marketing,  using,  leasing, 
consuming, or advertising the products that are subject to this Agreement and that the insurance coverage lists UFRF, the Florida 
Board of Governors, the University of Florida Board of Trustees, the University of Florida, the Investigator, and the inventors of 
the  Patent  Rights  as  additional  insureds.  Within  [**]  after  the  execution  of  this  Agreement  and  thereafter  [**]  between  [**], 
Licensee will present evidence to UFRF that the coverage is being maintained. In addition, Licensee shall provide UFRF with at 
least [**] prior written notice of any adverse change in or cancellation of the insurance coverage.

Section 13.Use of Names

Licensee  and  its  Sublicensee(s)  may  not  use  the  names  or  logos  of  UFRF  or  the  University  of  Florida,  nor  of  any  of 
either  institution’s  employees,  agents,  or  affiliates,  nor  the  name  of  any  inventor  of  Patent  Rights  or  Know-How,  nor  any 
adaptation of those names, in any promotional, advertising or marketing materials or any other form of publicity, or to suggest 
any endorsement by these entities or individuals, without the prior written approval of UFRF.

Section 14.Miscellaneous

14.1

Governing Law. This Agreement shall be governed and construed in accordance with the internal laws of the 
[**]  without  regard  to  its  conflict  of  laws  provisions,  and  venue  for  all  claims  or  other  causes  of  action  arising  out  of  this 
Agreement is [**].

14.2

Independent Contractors. The parties are independent contractors and not joint ventures or partners.

14.3

Integration. This Agreement constitutes the full understanding between the parties with reference to its subject 
matter,  and  no  statements  or  agreements  by  the  parties,  whether  oral  or  in  writing,  may  modify  the  terms  of  this  Agreement. 
Neither  party  may  claim  any  amendment,  modification,  or  release  from  any  provisions  of  this  Agreement,  unless  the  mutual 
agreement is in writing and signed by both parties.

14.4

No  Security  Interest.  Licensee  may  not  encumber  or  otherwise  grant  a  security  interest  in  any  of  the  rights 

granted under this Agreement to any third party.

20

 
14.5

Laws  and  Regulations.  Licensee  shall  comply  with  all  local,  state,  federal,  and  international  laws  and 

regulations that are applicable to the development, manufacture, use, and sale of Licensed Products, including:

Licensee  acknowledges  that  it  is  subject  to  and  agrees  to  abide  by  United  States  laws  and  regulations  (including  the 
Export Administration Act of 1979 and Arms Export Control Act) controlling the export of technical data, computer software, 
laboratory  prototypes,  biological  material,  and  other  commodities.  The  transfer  of  those  items  may  require  a  license  from  the 
cognizant  agency  of  the  United  States  Government  or  written  assurances  by  Licensee  that  it  will  not  export  items  to  certain 
foreign countries or persons without prior approval by that agency. UFRF neither represents that a license is or is not required nor 
that, if required, it will be issued.

Licensee  shall  obtain  all  necessary  approvals  from  the  United  States  Food  &  Drug  Administration,  Environmental 
Protection  Agency,  Department  of  Agriculture  and  any  similar  governmental  authorities  of  foreign  jurisdictions  in  which 
Licensee intends to make, use, sell or perform Licensed Products  

14.6 Force Majeure. Neither party is responsible for default, delay, or failure to perform, if such default, delay or failure 
to  perform  is  due  to  causes  beyond  the  party’s  reasonable  control,  including,  but  not  limited  to,  strikes,  lockouts,  inactions  of 
governmental authorities, war, fire, hurricane or other natural disaster, provided that the nonperforming party uses commercially 
reasonable  efforts  to  avoid  or  remove  those  causes  of  nonperformance  and  continues  performance  under  this  Agreement  with 
reasonable dispatch when the causes are removed. In the event of a default, delay or failure to perform described in this Section 
14.6, any date or times by which either party is scheduled to perform is extended automatically for a time equal to the time lost 
by reason of the excused default, delay or failure to perform.

Section 15.Notices

The parties shall provide any notice required to be given pursuant to this Agreement in writing to the addresses listed in 
this Section 15. Notice is effective on the day it is delivered personally with written receipt from an authorized signatory, on the 
second day after the day on which the notice has been delivered for next day delivery prepaid to a nationally recognized courier
service, on the fifth business day following deposit in the United States mail if sent certified or registered mail, (return receipt 
acknowledgement is not required to certify delivery).

If to UFRF:

If to Licensee:

President
University of Florida Research Foundation, Incorporated
223 Grinter Hall University of Florida
P. O. Box 115500
Gainesville, FL 32611-5500

nd

AavantiBio, Inc.
747 S.W. 2  Avenue, IMB31
Gainesville, FL 32611-5575
Attention: [**]

with a copy to:

UF Innovate | Tech Licensing

with a copy to:

Asher M. Rubin

21

 
Attn: Director (Rm. 112)
747 SW 2nd Avenue
Post Office Box 115575
Gainesville, Florida 32611-5575

Section 16.Confidentiality

Hogan Lovells US LLP
100 International Drive, Suite 2000 Baltimore, MD 
21202 asher.rubin@hoganlovells .com

Unless required by Florida Law, the parties (a) may only use each other’s Confidential Information (as defined below) as 
necessary to perform the obligations set forth in this Agreement (b) may not disclose the other’s Confidential Information to any 
third party, and (c) shall protect each other’s Confidential Information with the same degree of care that they exercise with their 
own Confidential Information but in no event less than a reasonable degree of care. The parties may disclose this Agreement and 
Confidential Information to their authorized Affiliates, directors, officers, employees, consultants, subcontractors, Sublicensees 
or  agents  and  investors  or  potential  investors  who  are  bound  by  similar  confidentiality  provisions.  For  the  purposes  of  this 
Agreement, “Confidential Information” means the terms of this Agreement and information disclosed by one party to the other 
that is marked “confidential” by the disclosing party or that is confirmed in writing within [**] after oral disclosure. Confidential 
Information does not include information that (i) is publicly known; (ii) is already known or independently developed without use 
of  the  Confidential  Information  as  shown  by  written  records;  (iii)  is  disclosed  by  a  third  party  having  no  known  obligation  of 
confidentiality with respect to the Confidential Information; or (iv) is required to be disclosed to comply with applicable laws or 
regulations or with a court or administrative order. These confidentiality obligations remain effective for [**] after disclosure of 
the Confidential Information.

Should any Investigator or individual working directly or indirectly under UFRF’s direction publish or present data or
experimental  results  related  to  the  Patent  Rights  or  Know-How  such  individual  shall  first  provide  a  copy  of  any  proposed 
disclosure (including any proposed abstract or manuscript for submission) to UFRF and Licensee for review at least [**] prior to 
the data of submission for the proposed publication or presentation for public disclosure. At Licensee’s request, any reference to 
Licensee’s  Confidential  Information  or  any  licensed  Know-How  shall  be  deleted.  If  Licensee  determines  that  information  is 
included in the proposed disclosure constitutes an Improvement or is otherwise information that is reasonably necessary or useful 
for commercialization of the Patent Rights, Licensee may request a deferral of the publication or disclosure to allow Licensee to 
file  or  have  filed  a  patent  application  disclosing  such  information  or  Improvement,  and  UFRF  shall  defer  the  publication  or 
disclosure for this period. 

Section 17.University Rules and Regulations

Licensee  understands  and  agrees  that  University  of  Florida  personnel  who  are  engaged  by  Licensee,  whether  as 
consultants,  employees,  or  otherwise  or  who  possess  a  material  financial  interest  in  Licensee  are  subject  to  the  University  of 
Florida’s  rules  regarding  outside  activities  and  financial  interests  set  forth  in  University  of  Florida  Regulation  1.011,  the 
University of Florida’s Intellectual Property Policy, and an associated monitoring plan which addresses conflicts of interests. Any
term  of  an  agreement  between  Licensee  and  University  of  Florida  personnel  which  seeks  to  vary  or  override  the  personnel’s 
obligations to the University of Florida may not be enforced without the express written consent of an individual authorized to 
vary or waive such 

22

 
 
obligations  on  behalf  of  the  University  of  Florida  Board  of  Trustees  and  UFRF.  Furthermore,  should  an  interest  of  Licensee 
conflict  with  the  interests  of  the  University  of  Florida,  University  of  Florida  personnel  are  obligated  to  resolve  those  conflicts 
according to the rules, guidelines, and policies of the University of Florida.

Section 18.Contract Formation and Authority

18.1

The  submission  of  this  Agreement  is  not  an  offer,  and  this  document  is  effective  and  binding  only  upon  the 
execution by duly authorized representatives of both Licensee and UFRF. Copies of this Agreement that have not been executed 
and  delivered  by  both  UFRF  and  Licensee  do  not  evidence  an  agreement  between  the  parties.  UFRF  may  terminate  this 
Agreement  without  the  requirement  of  any  notice  to  Licensee,  if  UFRF  does  not  receive  the  License  Issue  Fee  or  certificates 
representing  the  initial  Equity  Interests  to  be  issued  to  UFRF  pursuant  to  this  Agreement,  as  applicable,  within  [**]  of  the 
Effective Date.

18.2

UFRF  and  Licensee  hereby  warrant  and  represent  that  the  persons  signing  this  Agreement  have  authority  to 

execute this Agreement on behalf of the party for whom they have signed.

[signature page follows]

The parties have duly executed this Agreement on the dates indicated below.

UNIVERSITY OF FLORIDA RESEARCH FOUNDATION, 
INCORPORATED

AAVANTI BIO, INC.

By:/s/ Jim O’Connell
Jim O’Connell
Assistant Vice President for
Commercialization
Director, UF Innovate | Tech Licensing
Date: March 19, 2020

23

By:/s/ Phil Johnson
Name:  Phil Johnson
Title: 
Date: March 19 

Director

, 2020

 
 
 
Appendix E - Exclusive License Agreement to Aavanti [**]/A19111

Incorporated by reference to Exhibit 10.43 to the Company’s Form 10-K for the fiscal year ended December 31, 2022 as 

filed with the Securities and Exchange Commission on March 23, 2023.

24

 
 
Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of 
information that the registrant treats as private or confidential. Double asterisks denote omission.

FIRST AMENDMENT TO LICENSE AGREEMENT NO. A19110

Exhibit   10.42

WHEREAS, the University of Florida Research Foundation, Inc., a not-for-profit corporation duly organized and existing under the laws 
of the State of Florida and having its principal office at 223 Grinter Hall, Gainesville, Florida 32611 U.S.A. (hereinafter referred to as 
“UFRF), and AavantiBio, Inc., a Delaware corporation having its principal office/place of business at 747 SW 2nd Ave., Suite 195, 
IMB31, Gainesville, FL, 32601 (hereinafter referred to as “Licensee”) entered into a Standard Exclusive License Agreement (Agreement 
No: A19110) dated 17 March 2020 (“License Agreement”);

WHEREAS, the parties now wish to amend the License Agreement by this amendment (hereinafter referred to as “First Amendment”);

NOW, THEREFORE, in consideration of the premises and mutual covenants contained herein, the parties hereto agree as follows:

1.

2.

3.

4.

5.

6.

Capitalized terms not defined in this First Amendment shall have the meanings ascribed to them in the License Agreement.

The parties wish to update the estimated milestones set forth in Appendix B. Appendix B will be replaced by the New Appendix 
B attached to this First Amendment and incorporated herein by reference.

The parties wish to update the milestone for the first commercial sale. The parties agree to delete paragraph 3.2 (a) in its entirety 
and replace it with the following:

3.2 (a) Licensee shall use Commercially Reasonable Effects to achieve the estimated milestones set forth in the New Appendix 
B attached to the First Amendment and estimates that the first commercial sale of the first Licensed Product will occur on or 
before [**].

All other provisions of the License Agreement shall remain in full force and effect and unmodified by this First 
Amendment.

This First Amendment, together with the License Agreement, sets forth the entire agreement and understanding of the parties as to 
the  subject  matter  hereof  and  supersedes  all  proposals,  oral  or  written,  and  all  other  communications  between  the  parties 
concerning such subject matter.

The parties may execute this First Amendment in one or more counterparts, each of which is an original and all of which 
together are the same instrument. Delivery of a signed First Amendment by reliable electronic means, including email, shall be 
an effective method of delivering the executed First Amendment. This First Amendment may be stored by electronic means, 
and either an original or an electronically stored copy of this First Amendment can be used for all purposes, including in any 
proceeding to enforce the rights and/or obligations of the parties to this First Amendment.

[Signatures to follow on next page]

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of 
information that the registrant treats as private or confidential. Double asterisks denote omission.
IN WITNESS WHEREOF, the parties intending to be bound have caused this First Amendment to be executed by their duly authorized 
representatives.

Exhibit   10.42

UNIVERSITY OF FLORIDA 

AAVANTIBIO, INC. RESEARCH FOUNDATION, INC.

By: /s/ Jim O’Connell 

By: /s/ Bo Cumbo   

Jim O’Connell 
Director UF Innovate | Tech Licensing  Title: President and CEO

Bo Cumbo

 
 
 
 
 
 
 
 
 
  
Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of 
information that the registrant treats as private or confidential. Double asterisks denote omission.

Exhibit   10.42

Date: 8/23/2022 

Date: 8/23/2022 

 
 
 
 
 
 
 
 
 
 
 
  
Certain identified information has been excluded from the exhibit because it is both (i) not material and (ii) is the type of 
information that the registrant treats as private or confidential. Double asterisks denote omission.
STANDARD EXCLUSIVE LICENSE AGREEMENT WITH KNOW-HOW
Agreement No: A19111

Exhibit 10.43

TABLE OF CONTENTS

Section 1 Definitions
Section 2 Grant
Section 3 Diligence Obligations
Section 4 Payments
Section 5 Warranties and Disclaimers of UFRF
Section 6 Record Keeping; Accounting
Section 7 Patent Prosecution
Section 8 Infringement and Invalidity
Section 9 Term and Termination
Assignability
Section 10 
Dispute Resolution
Section 11 
Indemnification; Insurance
Section 12 
Section 13 
Use of Names
Section 14  Miscellaneous
Section 15 
Section 16 
Section 17 
Section 18 

Notices
Confidentiality
University Rules and Regulations
Contract Formation and Authority

Appendix A - Patent Rights and Know-How
Appendix B - Development Plan
Appendix C - Development Report
Appendix D - UFRF Royalty Report
Appendix E - Standard Exclusive License Agreement A19110

 
 
 
STANDARD EXCLUSIVE LICENSE AGREEMENT WITH KNOW-HOW

AGREEMENT NO: A19111

This Standard Exclusive License Agreement with Know-How (this “Agreement”) is effective as of March 17, 2020 (the 
“Effective Date”), between the University of Florida Research Foundation, Incorporated (hereinafter called “UFRF”), a nonstock, 
nonprofit Florida corporation, and Aavanti Bio, Inc., (hereinafter called “Licensee”), a Delaware corporation having its principal 
office/place of business at 3324 W. University Avenue, #261, Gainesville, FL, 32607-2504.

WHEREAS, Licensee is engaged in business relating to the development and commercialization of products that can use 
or incorporate UFRF’s intellectual property rights and has the capability of developing commercial applications of the intellectual 
property; and 

WHEREAS, UFRF owns inventions that are described below; UFRF is willing to grant a license to Licensee under the 

Patent Rights (defined in Section 1.14) and Know-How (as defined in Section 1.8); and Licensee desires a license under them.

THEREFORE, the parties agree as follows:

Section 1. Definitions

1.1

“Affiliate” means: any entity that directly or indirectly owns or controls, is owned or controlled by; or is under 
common ownership or control with a party to this Agreement; where “ownership” and “control” mean: (a) possession, or the right 
to possession, of at least fifty percent (50%) of the equity or voting stock of the entity or (b) the power to direct the management 
and policies of the entity; (c) the power to appoint or remove a majority of the board of directors of the entity; or (d) the right to 
receive 50% or more of the profits or earnings of the entity.  While an entity is entitled to the benefits of an Affiliate under this 
Agreement  for  only  the  period  of  time  the  entity  qualifies  as  an  Affiliate  under  this  definition,  all  obligations  under  this 
Agreement that accrued to the entity while an Affiliate shall survive until fulfilled even though the entity no longer qualifies as an 
Affiliate.

1.2

“Change Of Control” means: (a) any consolidation, merger, combination, reorganization or other transaction in 
which Licensee is not the surviving entity, other than a transaction with the principal purpose of effecting a change in domicile or 
the legal entity status of Licensee; (b) Equity Interests of Licensee constituting more than 50% of the voting power of Licensee 
are  exchanged  for  or  changed  into  other  Equity  Interests,  cash,  and/or  any  other  property,  whether  through  one  or  a  series  of 
transactions; (c) a sale or other disposition of all or substantially all of the assets of the Licensee; or (d) the assignment or transfer 
of this Agreement to a third party.

1.3

“Combination  Product”  means  a  Licensed  Product  that  is  comprised  of  at  least  one  other  active  ingredient, 

which is not a Licensed Product (regardless of whether co-formulated, co-packaged or otherwise administered).

1.4

“Confidential  Information”  means  information  or  material  disclosed  by  one  party  (“disclosing  party”)  to  the 

other party (“receiving party”) that is marked as confidential at the time 

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of disclosure or, if first disclosed orally or observed, is identified as confidential at the time of disclosure and summarized in a 
marked  writing  delivered  to  receiving  party  within  [**]  after  first  oral  disclosure.    Confidential  Information  does  not  include 
information or material that: (a) is in the public domain other than through acts or omissions of receiving party, or anyone that 
accessed the Confidential Information from receiving party; (b) is already known at the time of disclosure as shown by competent 
evidence; (c) is independently developed by the receiving party without knowledge of the Confidential Information, as shown by 
contemporaneously written records; or (d) is lawfully disclosed to receiving party by a third party without restriction.

1.5

“Development Plan” means the preliminary written plan summarizing the development activities that are to be 
undertaken by the Licensee to bring Licensed Products to the market that is attached as Appendix B, which may be updated from 
time to time by Licensee.

1.6

“Development Report” means a written report summarizing Licensee’s material technical and other efforts made 
towards  achieving  first  commercial  sale  for  all  Licensed  Products  under  development).    Such  reports  shall  include,  without 
limitation,  reasonably  detailed  summaries  of  information  describing  [**].    A  Development  Report  should  include  at  least  the 
information specified on Appendix C.

1.7

“Equity Interests” means equity securities or membership units of an entity or securities or membership units 

that are convertible into the entity’s equity securities or membership units.

1.8

“Investigator” means any of [**].

1.9

“Know-How”  means  information  and  materials  existing  as  of  the  Effective  Date,  to  the  extent  wholly  owned 
and controlled by UFRF that is necessary or useful to practice and/or commercialize the Patent Rights, and is generated by the 
Investigator  or  those  working  under  the  Investigator’s  direction,  including  the  processes,  techniques,  data,  and  materials 
identified on Appendix A, attached and incorporated herein.  If Know-How is provided in the form of: (a) tangible materials, 
then  all  progeny  and  derivatives  of  the  materials  made  by  or  on  behalf  of  Licensee  or  Sublicensee  are  included  within  this 
definition  of  Know-How;  and/or  (b)  software  or  other  copyrightable  work,  then  all  derivative  works  made  by  or  on  behalf  of 
Licensee or any Sublicensee are included within this definition of Know-How.

1.10

“Licensed Field” means all diagnostic, prophylactic, and therapeutic uses for Friedreich’s Ataxia, including all 
fields and all uses of adeno-associated virus gene therapy for cardiomyopathy, skeletal myopathy, liver targeted gene therapy, and 
Friedreich’s Ataxia.  Nonetheless, “Licensed Field” excludes the use of the Patent Rights for [**].

1.11

“Licensed Product” means any Product or Process or Know-How that is:

product is made, used, imported or sold;

(a)

is covered in whole or in part by a Valid Claim in the Patent Rights in any country in which the 

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Initials _______________
UFRF

 
the Patent Rights in any country in which any the process is used or in which the product is used, imported or sold; or

(b)

is manufactured by using a process which is covered in whole or in part by a Valid Claim in 

Know-How or using a process that is developed using Know-How.

(c)

incorporates, utilizes, or was developed utilizing Know-How or which is manufactured using 

that is the subject of Market Exclusivity based in whole or in part: (i) on a product or process 
that was at any time within the scope of any of sections (a), (b), or (c); or (ii) on the practice of the Patent Rights and/or the use of 
the Know-How at any time.

(d)

1.12

“Licensed Territory” means worldwide.

1.13

“Market Exclusivity” means, with respect to a Licensed Product, the exclusivity granted by FDA, pursuant to 
Section 351(k)(7) of the Public Health Services Act, entitled “Exclusivity for Reference Product,” and any non-United States law 
equivalents.

1.14

“Net Sales”  means  the  total  dollar  amount  invoiced  on  sales  of  Licensed  Products  less  deductions  accrued  in 
accordance with GAAP any charges where applicable and separately listed for (i) sales taxes or use taxes (except for value-added 
taxes capable of reimbursement and income taxes imposed on the sales of Licensed Product in foreign countries), tariffs, duties or 
customs  (all  separately  stated  on  the  invoice),  (ii)  prepaid  outbound  shipping  and  insurance  charges,  (iii)  deductions  for 
allowances given for returned or defective goods that do not exceed the original invoice amount, (iv) trade discounts given, not to 
exceed  the  original  invoice  amount,  (v)  charge  back  payments  and  rebates  given  for  the  Licensed  Product  to  (a)  managed 
healthcare  organizations,  (b)  federal,  state,  provincial  and/or  local  governments  or  other  governmental  agencies,  and  (c) 
purchasers and reimbursers.  Licensed Products will be considered sold when paid for; provided, however, that with respect to 
Licensed  Products  transferred  by  Licensee  to  its  Sublicensee  or  Affiliate  in  the  circumstances  described  in  item  (x)  in  the 
immediately  following  sentence,  any  such  Licensed  Products  will  be  considered  sold  when  they  are  transferred  to  any  such 
Sublicensee  or  Affiliate.    For  the  purpose  of  calculating  Net  Sales,  transfers  by  Licensee  to  its  Sublicensee  or  Affiliate  of 
Licensed Product under this Agreement for (x) end use (but not resale) by the Sublicensee or Affiliate shall be treated as sales by 
Licensee at the average amount invoiced by Licensee to third parties during such Net Sales calculation period or (y) resale by a 
Sublicensee  or  an  Affiliate  shall  be  treated  as  sales  at  the  average  amount  invoiced  by  such  Sublicensee  or  Affiliate  to  third 
parties during such Net Sales calculation period, in each case subject in all respects to the deductions under this Section 1.14.  
Notwithstanding the foregoing, a sale of a Licensed Product to a distributor, which is not a Sublicensee or Affiliate, in an arm’s-
length  transaction,  shall  be  treated  as  a  sale  if  Licensee  receives  no  further  compensation  for  that  Licensed  Product  from  any 
subsequent purchaser of that Licensed Product.  Notwithstanding the foregoing, when sold separately, Net Sales shall not include, 
and  shall  be  deemed  zero  with  respect  to,  (aa)  the  distribution  of  reasonable  quantities  of  promotional  samples  of  Licensed 
Products,  or  (bb)  the  transfer  of  Licensed  Product  to  a  third  party  to  use  Licensed  Product  for  the  sole  purpose  of  performing 
preclinical or clinical studies or (cc) the transfer of Licensed Product to a third party solely for charitable or compassionate use 
purposes if Licensee transfers Licensed Product at cost of goods or below.

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Initials _______________
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In  the  event  that  a  Product  is  sold  as  a  Combination  Product,  Net  Sales,  for  the  purposes  of  determining  royalty 
payments on the Combination Product, shall mean the gross amount collected for the Combination Product less the deductions 
set forth in clauses (i) - (vi) above, multiplied by a proration factor that is determined as follows:

(A)  If all active ingredients of the Combination Product were sold separately during the same or immediately preceding 
calendar quarter, the proration factor shall be determined by the formula [A / (A+B)], where A is the average gross sales price of 
all  Product  components  (as  applicable)  during  such  period  when  sold  separately  from  the  other  component(s),  and  B  is  the 
average gross sales price of the other component(s) during such period when sold separately from the Product components (as 
applicable); or

(B)  If  any  active  ingredients  of  the  Combination  Product  were  not  sold  or  provided  separately  during  the  same  or  
immediately preceding calendar quarter, the proration factor shall be determined by the Parties in good faith negotiations based 
on the relative value contributed by each active ingredient.

1.15

“Patent Challenge” means a challenge to the validity, patentability, or enforceability of any of the Patent Rights 

or otherwise opposing any of the Patent Rights.

1.16

“Patent Rights” means:

(a)

(b)

the patent(s)/patent application(s) identified on Appendix A;

all United States and foreign patent applications claiming priority to any of the patent(s) and 

patent application(s) identified in Appendix A; and

all patents issuing from the patent applications identified in Subsections 1.16(a) and 1.16(b), 
including,  letters  patent,  patents  of  addition,  continuations,  divisionals,  reissues,  reexaminations,  extensions,  restorations,  and 
supplementary protection certificates.

(c)

1.17

“Sublicense” means the agreement to grant or agree not to assert any right licensed to Licensee under Section 
2.4, including, any agreement that permits any use of all or part of the Patent Rights or Know-How for research, development, or 
the  manufacture,  marketing,  distribution,  commercialization,  sale,  offer  for  sale,  import  or  export  of  Licensed  Products.    An 
agreement that is described in this definition is a Sublicense whether or not it is called a “sublicense” and whether or not it is 
included in a stand-alone document or is part of a broader collaboration, development, or joint venture agreement or arrangement.  
Notwithstanding  the  foregoing,  grants  by  Licensee  of  the  rights  under  Section  2.4  pursuant  to  ordinary  course  operating 
agreements of Licensee, such as agreements to contract manufacturing organizations, contract research organizations, and clinical 
trial sites, shall not be deemed to be a Sublicense.

1.18

“Sublicensee” means any third party to whom Licensee grants a Sublicense.

1.19

“Sublicensing Revenue”  means  any  and  all  consideration  under  or  otherwise  in  connection  with  a  Sublicense 
received by Licensee,  including  license  issue  fees,  lump  sum  payments,  milestone payments, maintenance fees, profit sharing, 
joint marketing fee, equity or 

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other payments of any kind whatsoever, irrespective of whether such consideration is received in the form of cash, offsets, barter, 
credit, stock, warrants, release from debt, goods or services, licenses back, a payment for equity that exceeds the pre-Sublicense 
fair market value by more than [**]% of the equity, equity exchanges, or any other form whatever, excluding: (a) royalties paid to 
UFRF based on Net Sales by the Sublicensee; and (b) if accompanied by competent documentary evidence: (i) reimbursement of 
the  direct  costs  of  bona  fide  future  research  and  development  of  a  Licensed  Product  (and  not  other  products);  and  (ii)  for  any 
payment based on the same event that triggers a milestone payment to UFRF under Section 4.5 , the amount due to UFRF for the 
corresponding milestone under Section 4.5, provided that, for avoidance of doubt, the amount excluded shall not be greater than 
the corresponding payment required in Section 4.5.

1.20

“Royalty Report” means a certified written report (Appendix D), by country, showing how any amounts payable 
to  UFRF  on  amounts  of  Net  Sales  have  been  calculated  and  detailing  the  number,  description,  aggregate  selling  prices,  all 
necessary tax filings, but only to the extent required to verify reductions taken related to foreign tax credits, and information to 
verify deductions from Net Sales (and a listing of the pertinent Patent Rights where the Licensed Product is composed of a subset 
of  the  Patent  Rights)  sold  or  otherwise  disposed  of  in  each  calendar  quarter  upon  which  royalty  is  payable  and  the  royalty 
payment amount due under Section 4.3 and 4.4

1.21

“Valid Claim” means a claim (i) of any issued, unexpired patent that has not been revoked or held unenforceable 
or invalid by a decision of a court or Governmental Authority of competent jurisdiction from which no appeal can be taken, or 
with respect to which an appeal is not taken within the time allowed for appeal, and that has not been disclaimed or admitted to 
be invalid or unenforceable through reissue, disclaimer or otherwise, or (ii) of any pending patent application the earliest priority 
date of which claim is less than [**], that has not been irrevocably cancelled, withdrawn or abandoned.  For clarity, if a pending 
claim issues and meets the requirements of this Section 1.21, it is a Valid Claim regardless of the amount of time such claim was 
pending.

Section 2. Grant

2.1

Patent Rights.  In return for the royalties and other payments described in Section 4, UFRF grants to Licensee a 
royalty-bearing, limited term, exclusive license with the right to grant Sublicenses through multiple tiers to Patent Rights in the 
Licensed Field and Licensed Territory to make, have made, use, sell, have sold, import, and export Licensed Products.

2.2

Know-How.  In return for the royalties and other payments described in Section 4, UFRF grants to License a 
royalty-bearing,  non-exclusive  license  with  the  right  to  grant  Sublicenses  through  multiple  tiers  under  the  Know-How  in  the 
Licensed  Field  and  Licensed  Territory  to  make,  have  made,  use,  sell,  have  sold,  import,  and  export  Licensed  Products  and 
Licensed Processes

2.3

Improvements.

(a)

Licensee shall be notified in writing when UFRF receives any written invention disclosure of 
any  new  invention  or  discovery  that  lists  (i)  Investigator  as  an  inventor  and  (ii)  Licensee  as  a  source  of  funding 
(“Improvements”).    If,  within  [**]  thereafter,  Licensee  notifies  UFRF  in  writing  that  it  wishes  to  obtain  a  license  to  such 
Improvements.  In such event, this 

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Agreement shall be amended to add such Improvements to the Patent Rights or Know-How, as appropriate.  The Parties shall 
negotiate  in  good  faith  a  reasonable,  additional  license  issuance  fee,  which  shall  be  the  only  additional  financial  obligation  of 
Licensee resulting from the exercise of the option with respect to such Improvement and all other terms of the Agreement shall 
remain in force and apply.

(b)

In addition, UFRF shall use good faith efforts to notify Licensee after it becomes aware of any 
other new written invention disclosure with Investigator as an inventor that directly relates to Licensed Products in the Licensed 
Field that is not an Improvement; provided, however, that UFRF’s failure to do so shall not constitute a breach of this Agreement.  
Upon receipt of any such notification, Licensee shall have the rights with respect to such invention as set forth for Improvements 
as set forth in clause (a) above.

2.4

Sublicense Rights.

(a)

Licensee  shall  advise  UFRF  of  material  negotiations  for  sublicenses  with  third  parties  that 
Licensee  believes  are  reasonably  likely  to  lead  to  a  Sublicense;  provided,  that  in  no  event  shall  Licensee  be  required  by  this 
sentence to violate the terms of any confidentiality or similar agreement or arrangement with a potential sublicensee.  Licensee 
may grant written Sublicenses to third parties only if Licensee is in compliance with the diligence obligations in Section 3 or is 
selling  Licensed  Products.    Any  agreement  granting  a  Sublicense  shall  state  that  the  Sublicense  is  subject  to  the  terms  of  this 
Agreement,  including  with  respect  to  termination.    Licensee  has  the  same  responsibility  for  the  activities  of  any  Sublicensee 
under any Sublicense as if the activities were directly those of Licensee.  Licensee shall also include provisions in all Sublicenses 
to  provide  that  in  the  event  Sublicensee  or  its  Affiliate  brings  a  Patent  Challenge  against  UFRF  or  assists  another  party  in 
bringing a Patent Challenge against UFRF (except as required under a court order or subpoena) then Licensee may terminate the 
Sublicense  within  [**].    For  clarity,  additional  tiers  of  sublicense  may  be  made  by  a  Sublicensee,  and  any  such  additional 
sublicense shall include provisions that such sublicense shall adhere to the provisions of this Section 2.4(a).

(b)

Licensee  shall  provide  UFRF  with  a  final  un-redacted  copy  of  each  Sublicense  within  [**] 
after execution and forward to UFRF [**] a copy of reports received by Licensee from its Sublicensees regarding development of 
Licensed Products and payments under the Sublicense agreements.  Failure of Licensee to provide UFRF with un-redacted copies 
of  each  Sublicense  agreement  within  [**]  after  execution  of  the  Sublicense  agreement  is  a  material  breach  of  this  Agreement.  
Notwithstanding  the  foregoing,  Licensee  may  redact  from  each  Sublicense  the  confidential  and  proprietary  information  of  the 
Sublicensee that is not relevant to the Licensed Patents or Licensed Know-How.

2.5

Patent Challenge.  If Licensee or any of its Affiliates brings a Patent Challenge against UFRF, or Licensee or 
any of its Affiliates assists another party in bringing a Patent Challenge against UFRF (except as required under a court order or 
subpoena),  and  UFRF  does  not  terminate  this  Agreement  pursuant  to  Section  9.4,  then,  if  the  Patent  Challenge  is  successful, 
Licensee may not recoup any consideration, including royalties, paid to UFRF during the period 

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of challenge.  If a Patent Challenge is unsuccessful, Licensee shall reimburse UFRF for all reasonable legal fees and expenses 
incurred in its defense against the Patent Challenge.

2.6

Retained Rights.  UFRF reserves to itself and the University of Florida the right to practice the Patent Rights 
and  Know-How  for  their  internal  non-commercial  research  including  research  sponsored  by  commercial  entities,  clinical 
(including,  but  not  limited  to  patient  care  at  Shands  Teaching  Hospital  and  University  of  Florida  patient  care  facilities),  and 
educational purposes.  In addition, UFRF reserves to itself, as well as to the University of Florida and to all non-profit research 
institutions  the  right  to  use  materials  that  are  covered  under  Patent  Rights  and  Know-How  for  their  internal  non-commercial
research  and  educational  purposes  and  for  all  applicable  governmental  requirements  and  guidelines  governing  the  ability  to 
transfer  materials.    For  clarity,  the  rights  reserved  by  UFRF  do  not  include  the  ability  to  use  materials  covered  under  Patent 
Rights  and  Know-How  for  conduct  of  sponsored  commercial  research  for  a  third  party,  without  the  prior  written  consent  of 
Licensee, which shall  not  unreasonably  be  withheld.    In  addition,  UFRF  agrees that any material or data transferred to a non-
profit research institution pursuant to the retained rights shall be transferred pursuant to a Material Transfer Agreement or Data 
Transfer Agreement confirming that the materials and/or data are transferred solely for noncommercial, research and educational 
uses.

2.7

Un-Addressed Markets or Territories.    If  prior  to  [**]  of  a  Licensed  Product  by  Licensee,  an  Affiliate  or  any 
Sublicensee,  UFRF  notifies  Licensee,  in  writing,  of  a  third  party’s  good  faith  interest  in  developing  Licensed  Products  for  a 
specific indication or for one or more specific countries, which Licensee is not currently addressing and does not have plans to 
address (an “Undeveloped Indication/Region”), UFRF may request that Licensee to negotiate, in good faith, a Sublicense with 
such third party, consistent with the terms of this Agreement, and otherwise on commercially reasonable terms; provided, that 
such third party has the reasonable ability to develop a Licensed Product for such Undeveloped Indication/Region.  Licensee will 
have [**] to negotiate a Sublicense with the third party, in accordance with the preceding sentence.  Alternatively, Licensee may 
propose  to  UFRF  within  [**]  of  referral,  Licensee’s  product  development  plans  for  such  market  or  territory.    If,  thereafter, 
Licensee commences those product development plan within [**] of the referral date, then Licensee shall retain all rights with 
respect to such market or territory and shall not be obligated to negotiate a Sublicense with the third party.  If Licensee has not 
executed  a  Sublicense  with  the  third  party  on  the  terms  set  forth  in  this  Section  2.7,  nor  has  provided  a  revised  product 
development plan and commenced such product development plan within the period set forth above, then Licensee’s rights to the 
Patent Rights in the unaddressed market or territory shall cease upon [**] prior written notice to Licensee, and UFRF may offer 
those rights to the third party.  Should UFRF offer those rights to a third party, UFRF shall notify Licensee.

2.8

Minimum Investment.

Company shall receive at least [**] dollars ($[**]) in funding (which may include external equity investment as well as 

grants) within [**] of the Effective Date or UFRF shall, as its sole and exclusive remedy, have the right to terminate the License.

Section 3. Diligence Obligations

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3.1

Development.  Licensee agrees and warrants that:

Patent Rights and Know-How;

(a)

it  has  or  will  obtain  the  expertise  necessary  to  evaluate  independently  the  inventions  of  the 

it will provide to UFRF a [**] Development Plan respecting exploitation of the Patent Rights 
(Appendix B) to the end that inventions of the Patent Rights and Know-How will be utilized to provide Licensed Products for 
sale in the retail market within the Licensed Field;

(b)

(c)

(d)

it will use commercially reasonable efforts to develop markets for Licensed Products;

until the date of first commercial sale of Licensed Products, it will supply UFRF with a written 

Development Report [**] after the end of each [**];

States law, 35 U.S.C. §287, including virtual patent marking (at Licensee’s discretion) with respect to all Licensed Products; and

(e)

Licensee and Sublicensee(s) shall apply patent markings that meet all requirements of United 

at  least  [**]  before  a  reasonably  estimated  date  for  the  commencement  of  manufacturing  of 
commercial  production  of  Licensed  Products,  Licensee  will  include  in  the  Development  Report  a  summary  of  the  material 
activities planned for commercial manufacturing.

(f)

3.2

First Commercial Sale; Milestones.

forth in Exhibit B, and estimates that the first commercial sale of the first Licensed Product will occur on or before [**].

(a)

Licensee  shall  use  Commercially  Reasonable  Efforts  to  achieve  the  estimated  milestones  set 

(b)

If Licensee requests an extension of any milestones, UFRF shall consider the requests in good 
faith.  Licensee shall make extension requests in writing at least [**] prior to the required due dates, fully describing Licensee’s 
diligent  efforts  to  achieve  the  milestone.    Upon  granting  extension  requests,  UFRF  and  Licensee  shall  negotiate  the  terms  of 
extensions in good faith.

3.3

Clinical  Trials.    University  of  Florida  policies  may  require  approval  of  clinical  trials  involving  technology 
invented at the University.  Accordingly, Licensee will notify UFRF prior to commencing any clinical trials at the University of 
Florida or its affiliated medical facilities with Licensee Products.

Section 4. Payments

4.1

License Issue Fee.  Licensee shall pay to UFRF a non-refundable license issue fee of [**] dollars ($[**]) within 

[**] of the Effective Date.

4.2

Annual License Maintenance Fee.  Licensee shall pay an annual license maintenance fee of $[**] each year on 
the anniversary of the Effective Date of this Agreement.  The annual license maintenance fee is payable until the first commercial 
sale of a Licensed 

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Product, after which time minimum royalties instead of the annual license maintenance fee are due.

4.3

Royalty on Licensed Products.

Licensee shall pay UFRF, on a country-by-country basis, the following earned royalties:

(I)  For all Licensed Products that qualify under Sections 1.10(a), (b), or (d):

of Net Sales,

(a)

(b)

$[**] and up to $[**], or

[**] percent ([**]%) of Annual Net Sales of Licensed Product(s) in Licensed Field up to $[**] 

[**]  percent  ([**]%)  of  Annual  Net  Sales  of  Licensed  Product(s)  in  Licensed  Field  above 

$[**] of Net Sales; and 

(c)

[**]  percent  ([**]%)  of  Annual  Net  Sales  of  Licensed  Product(s)  in  Licensed  Field  above 

(II) for all Licensed Products that qualify only under Sections 1.10(c) but not any of Sections 1.10(a), (b), or (d):

$[**], or

(d)

(e)

(f)

[**]% of Net Annual Sales of Licensed Product(s) in Licensed Field up to $[**] of Net Sales,

[**]%  of  Net  Annual  Sales  of  Licensed  Product(s)  in  Licensed  Field  above  $[**]  and  up  to 

[**]% of Net Annual Sales of Licensed Product(s) in Licensed Field above $[**] of Net Sales.

Earned royalties are earned as of the earlier of the date the Licensed Product is actually sold and paid for and the date an 
invoice  is  sent  by  Licensee  or  its  Sublicensee(s),  or  as  of  the  date  a  Licensed  Product  is  transferred  to  a  third  party  for 
promotional reasons.

Within [**] after the end of each calendar quarter ending on March 31, June 30, September 30 or December 31, Licensee 
shall pay amounts owing to UFRF under this Section 4.3 after the amount of minimum royalties paid pursuant to Section 4.4 is 
exceeded.    Royalties  are  not  additive,  but  are  payable  based  on  the  highest  applicable  rate  that  is  calculated  according  to  this 
Section 4.3.

4.4

Minimum Royalty.

pay UFRF minimum royalty payments as follows.

(a)

Beginning in the calendar year of first commercial sale of a Licensed Product, Licensee shall 

Payment
[**]
[**]
[**]

Year
[**]
[**]
[**]

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[**]
[**]

[**]
[**]

(b)

The first annual minimum royalty payment of $[**] is due by December 31 of the year of first 
commercial sale and shall be prorated according to date of first commercial sale.  The Licensee shall pay the minimum royalty in 
advance  on  a  quarterly  basis  on  March  31,  June  30,  September  30,  and  December  31  for  each  year  during  the  term  of  this 
Agreement.    Minimum  royalties  apply  to  earned  royalties  on  a  calendar  year  basis;  Net  Sales  that  are  made  during  a  prior  or 
subsequent calendar year have no effect on the annual minimum royalty due to UFRF for other than the same calendar year in 
which the royalties were earned.

4.5

Milestone Payments.

milestone for each Licensed Product, as follows:

(a)

Licensee  shall  pay  UFRF  milestone  payments  within  [**]  of  the  first  achievement  of  each 

Event

Milestone Payment

[**]
[**]
[**]
[**]
[**]

[**]
[**]
[**]
[**]
[**]

Each milestone payment shall only be owed once with respect to each Licensed Product.

4.6

Change of Control.  Licensee shall pay to UFRF a fee of $[**] upon the first Change of Control of Licensee.  

Licensee shall notify UFRF and pay the Change of Control fee within [**] of the occurrence of a Change of Control.

4.7

Issuance of Equity.

(a)

As further consideration for the rights granted to Licensee by this Agreement, Licensee shall 
issue to UFRF an amount of equity securities or membership units of Licensee equal to [**] percent ([**]%) of the total amount 
of issued and outstanding equity securities or membership units of Licensee or securities or membership units that are convertible
into Licensee’s equity securities or membership units (collectively, “Equity Interests”) on the Effective Date.

(b)

If  at  any  time  after  the  Effective  Date  and  before  Licensee  receives  a  total  of  [**]  dollars 
($[**]) cash in exchange for the issuance of Licensee’s Equity Interests, Licensee issues any Equity Interests, then Licensee shall 
issue  additional  Equity  Interests  to  UFRF  such  that  the  total  amount  of  Equity  Interests  issued  to  UFRF  remains  [**]  percent 
([**]%) of the total number of issued and outstanding Equity Interests of Licensee calculated on a Fully Diluted Basis.  “Fully 
Diluted Basis” means assuming the conversion of all outstanding convertible securities and 

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the  exercise  of  all  outstanding  options,  warrants  and  other  similar  securities,  regardless  of  whether  such  securities,  options  or 
warrants are then convertible or exercisable.

(c)

If  Licensee  engages  in  an  offering  to  sell  any  Equity  Interests,  UFRF  and/or  any  entity  to 
which UFRF has assigned the right to exercise UFRF’s participation rights may purchase [**]% of the Equity Interests that are 
issued in that offering on the same terms that are offered to the other purchasers in that offering.  UFRF shall exercise its right to 
purchase equity interest under this Subsection (c) in writing, within [**] of receiving notice of the offering from the Company.  If 
no such exercise notice from UFRF is received, then the right shall be deemed waived.  This Subsection (c) shall terminate on the 
[**] of the Effective Date.

Licensee  shall  issue  Equity  Interests  to  UFRF  under  this  Section  4.6  in  accordance  with  the 
Equity  Agreement  or  Operating  Agreement  between  UFRF  and  Licensee.    UFRF  shall  enter  into  customary  venture  capital 
financing documents with respect to its Equity Interests if requested by the Company.

(d)

4.8

Sublicense Fees.

With  respect  to  Sublicenses  granted  by  Licensee  under  Section  2.4(a),  Licensee  shall  pay  to 
UFRF  an  amount  equal  that  Licensee  would  have  been  required  to  pay  under  Section  4.3  had  Licensee  sold  the  Licensed 
Products that are sold by a Sublicensee.

(a)

(b)

If Company receives any consideration such as fees, minimum royalties, milestone payments 
or other payments pursuant to sublicense of the Patent Rights and Know-How, and such payments are not running royalties based
on Net Sales, then Company shall pay UFRF [**] percent ([**]%) of such consideration within [**] of receipt.  Royalties from 
Sublicenses will pass through to UFRF at the same Royalty rate as is specified in this term sheet.  For clarity, Sublicense Fees 
shall exclude (the “Excluded Amounts”): amounts received in connection with financing events, capital investments (debt and/or 
equity), assignments (and not as a consequence of restructuring or other corporate organizing or merger or sale of Company or 
any  business  or  assets  or  similar  transaction),  acquisition  of  Company,  payments/reimbursements  for  R&D  and  other  out-of-
pocket expenses incurred with respect to the Patent Rights or Licensed Products, distribution, service contracts, regulatory trials 
and joint development efforts.  For clarity, such exclusions may be part of a larger transaction in which a sublicense under the 
Patent  Rights  is  granted,  provided  that  such  transactions  will  also  contemplate  significant  future  milestones,  royalties  or  other 
income that would be considered Sublicense Payments.

Licensee  may  not  receive  from  Sublicensees  anything  of  value  in  lieu  of  cash  payments  in  consideration  for  any 
Sublicense under this Agreement other than the Excluded Amount without the express prior written consent of UFRF, not to be 
unreasonably withheld, conditioned or delayed.

4.9

Royalty Stacking.

Only one royalty will be due on Net Sales of any Licensed Product, even if such Licensed Product is covered by multiple 

patents, patent applications or claims within the Patent Rights.

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(a)

During the Term, in the event Licensee reasonably determines that it is necessary to obtain a 
license  or  licenses  under  any  patent  from  any  third  party  or  third  parties  in  order  to  exploit  Licensed  Products  in  a  particular 
country  (each,  a  “Third Party License”),  then  in  each  calendar  quarter  during  which  royalties  are  payable  to  UFRF  under  this 
Agreement  in  respect  of  Net  Sales  of  a  Licensed  Product  or  a  Licensed  Process  in  such  country,  Licensee  shall  be  entitled  to 
deduct  from  the  royalty  paid  to  UFRF  for  such  country  a  maximum  of  [**]  percent  ([**]%)  of  the  royalties  actually  paid  by 
Licensee under each such Third Party License(s) in that calendar quarter on account of sales of that Licensed Product or Licensed 
Process in such country.

(b)

Additional  Patents.    During  the  Term,  in  the  event  Licensee  enters  into  a  license  agreement 
with  UFRF  to  an  Additional  Patent,  then  in  each  calendar  quarter  during  which  royalties  are  payable  to  Licensor  under  this 
Agreement  in  respect  of  Net  Sales  of  a  Licensed  Product  or  a  Licensed  Process  in  such  country,  Licensee  shall  be  entitled  to 
deduct  from  the  royalty  paid  to  UFRF  for  such  country  a  maximum  of  [**]  percent  ([**]%)  of  the  royalties  actually  paid  by 
Licensee to UFRF under each such license agreement with UFRF to an Additional Patent in that calendar quarter on account of 
sales of that Licensed Product or Licensed Process in such country.

(c)

In no event will the earned royalty payable to UFRF for Net Sales be lower than [**] the rate 

specified in Section 4.3(a).

4.10

Overlap with Agreement A19110.

In the event that a Licensed Product is also covered by agreement A19110 (Appendix E) then only one payment is due 

under each of Sections 4.3, 4.4, and/or 4.5.

There shall only be one payment due based on a Change in Control pursuant to Section 4.6, under this Agreement and 
under  Agreement  A19110.    Likewise,  the  equity  provisions  of  Sections  4.6(a)-4.6(d)  shall  apply  only  once  (to  either  this 
Agreement A19111 or Agreement A19110).

Section 5. Warranties and Disclaimers of UFRF

5.1

UFRF represents that its employees have assigned or are obligated to assign to UFRF their entire right, title, and 
interest in the Patent Rights and Know-How and that it has authority to grant the rights and licenses set forth in this Agreement.  
However, nothing in this Agreement is:

Patent Rights;

(a)

(b)

a  warranty  or  representation  by  UFRF  of  the  validity  or  scope  of  any  right  included  in  the 

a warranty or representation that anything made, used, sold or otherwise disposed of under the 

license granted in this Agreement does not infringe patents or other rights of third parties;

Patent Rights;

(c)

an  obligation  to  bring  or  prosecute  actions  or  suits  against  third  parties  for  infringement  of 

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(d)

an obligation to furnish know-how or services other than those specified in this Agreement; or

a warranty or representation by UFRF that it will not grant licenses to others to make, use or 
sell products not covered by the claims of the Patent Rights which may be similar or compete with products made or sold by 
Licensee.

(e)

5.2

EXCEPT  AS  OTHERWISE  EXPRESSLY  SET  FORTH  IN  THIS  AGREEMENT,  UFRF  MAKES  NO 
REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING 
BUT  NOT  LIMITED  TO  WARRANTIES  OF  MERCHANTABILITY,  FITNESS  FOR  A  PARTICULAR  PURPOSE,  AND 
VALIDITY  OF  PATENT  RIGHTS  CLAIMS,  ISSUED  OR  PENDING.    UFRF  ASSUMES  NO  RESPONSIBILITIES 
WHATSOEVER WITH RESPECT TO USE, SALE, OR OTHER DISPOSITION BY LICENSEE, ITS SUBLICENSEE(S), OR 
THEIR VENDEES OR OTHER TRANSFEREES OF PRODUCTS INCORPORATING OR MADE BY USE OF INVENTIONS 
LICENSED UNDER THIS AGREEMENT.

Section 6. Record Keeping; Accounting

6.1

Licensee  and  its  Sublicensee(s)  shall  keep  books  and  records  sufficiently  to  verify  the  accuracy  and 
completeness  of  Licensee’s  and  its  Sublicensee(s)’s  accounting,  including  without  limitation,  inventory,  purchase  and  invoice 
records,  manufacturing  records,  sales  analysis,  general  ledgers,  financial  statements,  and  tax  returns  relating  to  the  Licensed 
Products.    Licensee  and  its  Sublicensee(s)  shall  preserve  these  books  and  records  for  at  least  [**]  after  they  are  created  or  as 
required by federal law, both during and after the term of this Agreement.

6.2

Licensee  and  its  Sublicensee(s)  shall  take  all  steps  necessary  so  that  UFRF  may,  within  [**]  of  its  written 
request,  audit,  reasonably  review  and  copy  all  of  Licensee’s  books  and  records  at  a  single  United  States  location  to  verify  the 
accuracy  of  Licensee’s  and  its  Sublicensee(s)’s  accounting.    The  review  may  be  performed  by  any  authorized  employees  of 
UFRF as well as by any attorneys or accountants designated by UFRF upon reasonable notice and during regular business hours.  
If  a  deficiency  with  regard  to  any  payment  is  determined,  Licensee  and  its  Sublicensee(s)  shall  pay  the  deficiency  along  with 
applicable interest as described in Subsection 6.4(a) within [**] of receiving notice.  If a payment deficiency for a calendar year 
exceeds [**] percent ([**]%) of amounts paid for that year, then Licensee or its Sublicensee(s) shall pay UFRF’s out-of-pocket 
expenses incurred with respect to the review.

6.3

At any time during the term of this agreement UFRF may request in writing that Licensee verify the calculation 
of any past payments owed to UFRF through the means of a self-audit.  No request may be made more than [**] with respect to 
the same period.  Within [**] of the request, Licensee shall complete a self-audit of its books and records to verify the accuracy 
and completeness of the payments owed.  Within [**] of the completion of the self-audit, Licensee shall submit to UFRF a report 
detailing the findings of the self-audit and the manner in which it was conducted in order to verify the accuracy and completeness 
of the payments owed.  If Licensee has determined through its self-audit that there is any payment deficiency, Licensee shall pay 
UFRF the deficiency along with applicable interest under Subsection 6.4(a) with the submission of the self-audit report to UFRF.

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6.4

Accounting for Payments.

(a)

Any amounts which remain unpaid after the date they are due to UFRF under this Section 6, 
Section 7 or any other provision of this agreement accrue interest from the due date at the rate of [**]% per month.  This interest 
provision is not a grant of permission for any payment delays.  Licensee is responsible for repayment to UFRF of any reasonable 
attorney, collection agency, and other out-of-pocket expenses to collect overdue payments.

Agreement in United States dollars at the following address or by wire transfer:

(b)

Except  as  otherwise  directed,  Licensee  shall  pay  all  amounts  owing  to  UFRF  under  this 

University of Florida Research Foundation, Incorporated
288 Grinter Hall, PO Box 115500
Gainesville, Florida 32611-5500
Attention: Business Manager
For Wire Transfer Information: http://research.ufl.edu/ufrf/wiring.html 

The wire transfer link is also included at the bottom of all invoices for your accounting purposes.

Licensee shall convert all monies owing in currencies other than United States dollars at the rate shown in the Federal 

Reserve Noon Valuation - Value of Foreign Currencies on the day preceding the payment due date.

(c)

On  the  date  of  each  payment  to  UFRF,  Licensee  shall  submit  a  certified  full  accounting 
statement showing how any amounts payable to UFRF have been calculated.  In addition to being certified, the Licensee shall 
include  on  all  accounting  statements  a  written  representation  signed  by  an  executive  officer  of  Licensee  that  states  that  the 
statements  are  true,  accurate,  and  fairly  represent  all  amounts  payable  to  UFRF  pursuant  to  this  Agreement.    Licensee  shall 
provide accounting on a per-country and product line, model or trade name basis and shall summarize them on the form shown in 
Appendix D Royalty Report.

UFRF.

(d)

If no payment is owed to UFRF, Licensee shall supply an accounting demonstrating that fact to 

(e)

Licensee shall make all payments due under this Agreement net of taxes, assessments, or other 
charges of any kind which may be imposed on UFRF by any government or political subdivision with respect to any amounts 
payable to UFRF pursuant to this Agreement.  All taxes, assessments, or other charges shall be assumed by Licensee to the extent 
those  taxes  fall  within  the  scope  of  the  foregoing  sentence.    Licensee  is  responsible  for  all  wire/bank  fees  associated  with  all 
payments due to UFRF pursuant to this Agreement.

Section 7. Patent Prosecution

7.1

UFRF  shall  file,  prosecute,  and  maintain  the  Patent  Rights  using  counsel  of  its  choice.    UFRF  shall  provide 
Licensee  with  copies  of  all  documents  sent  to  and  received  from  the  United  States  Patent  and  Trademark  Office  and  foreign 
patent offices relating to Patent Rights.  To 

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the extent such documents are not otherwise publically available, Company agrees to keep such information confidential.

7.2

Licensee shall pay UFRF $[**] dollars, within [**] of the Effective Date to reimburse expenses associated with 
preparation, filing, prosecution, issuance, maintenance, defense, and reporting of the Patent Rights prior to the Effective Date.  
(NOTE: the above referenced dollar amount in this Section 7.2 is subject to change, as UFRF may not have received all related 
patent prosecution expense invoices from the law firm at the time of license negotiation.)

7.3

UFRF  will  solicit  input  from  Licensee  regarding  (a)  actions  to  be  taken  in  connection  with  the  Licensed 
Patent(s), and (b) fees, annuities, costs and expenses to be incurred in connection therewith.  UFRF will submit, or will cause to 
be  submitted  to  Licensee  all  correspondence  or  other  materials  related  to  the  preparation,  filing,  prosecution  (including 
interferences and oppositions), issuance, maintenance and reporting of the Patent Rights for Licensee’s review and comment prior 
to any filing or other submission thereof, and UFRF will give due consideration to comments provided by Licensee or Licensee’s 
counsel and shall reasonably incorporate the comments of Licensee or Licensee’s counsel.  If Licensee fails to provide comments 
regarding actions to be taken, submissions or payment of fees, annuities, or other costs or expenses within [**] of the date of 
UFRF’s  submission  thereof  to  Licensee  then  UFRF  will  assume  Licensee  has  no  comments.    In  the  event  that  Licensee’s 
comments  or  proposed  strategy  is  in  conflict  with  the  comments  or  proposed  strategy  of  another  licensee  in  a  different  field, 
Licensee,  UFRF  and  the  other  licensee  shall  cooperate  to  determine  whether  a  mutually  agreeable  approach  (e.g.,  claim 
amendment,  argument  and/or  filing  strategy)  is  reasonably  feasible  and  if  such  an  approach  is  not  reasonably  feasible  shall 
cooperate to file one or more additional applications to allow Licensee and the other licensee to pursue their own independent, 
field-specific claims in separate application free of conflict from one another.  Each licensee shall bear the sole costs for such
field-specific  applications.    Licensee  shall  pay  all  costs  and  expenses  incurred  by  UFRF  related  to  the  preparation,  filing, 
prosecution  (including  interferences  and  oppositions),  issuance,  maintenance  and  reporting  of  the  Patent  Rights  that  were  not 
reimbursed pursuant to Section 7.2 within [**] of receipt of an invoice from UFRF.

7.4

Licensee  may  elect  upon  [**]  prior  written  notice  to  decline  to  reimburse  UFRF  for  patent  expenses  for  any 
Patent Right in any particular country or jurisdiction.  In that case, the license granted to Licensee, with respect to those Patent 
Rights by this Agreement, terminates after the [**] in that country or jurisdiction.

Section 8.

Infringement and Invalidity

8.1

Licensee  shall  inform  UFRF  promptly  in  writing  of  any  alleged  infringement  of  the  Patent  Rights  by  a  third 

party of which it is aware, and of any available evidence of the alleged infringement.

8.2

During the term of this Agreement, Licensee shall have the first right, but not the obligation to prosecute any 
infringement  of  the  Patent  Rights.    If  Licensee  does  not  prosecute  any  infringement  of  the  Patent  Rights,  then  UFRF  may 
prosecute that infringement  of  the  Patent  Rights  at  its  own  expense.    If  either Party prosecutes any infringement of the Patent 
Rights, then the other 

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Party agrees that the prosecuting Party may include the other Party as a co-plaintiff in any infringement suit without expense to 
the non-prosecuting Party.

8.4

If  a  declaratory  judgment  action  is  brought  against  UFRF  or  Licensee  by  a  third  party  alleging  invalidity, 
unpatentability,  unenforceability,  or  non-infringement  of  the  Patent  Rights,  Licensee,  at  its  option,  may  within  [**]  after 
commencement of the action take over the sole defense of the action at its own expense.  If Licensee does not exercise this right 
and Licensee is the sole licensee of the Patent Rights, UFRF may be responsible for the sole defense of the action at Licensee’s 
sole expense, subject to Sections 8.5 and 8.6.

8.5

If Licensee undertakes the enforcement or defense of the Patent Rights by litigation, Licensee shall apply any 
recovery  of  damages  first  in  satisfaction  of  [**]  and  next  toward  [**].    Licensee  shall  treat  the  balance  remaining  from  any 
recovery as [**].

8.6

In any suit in which either party is involved to enforce or defend the Patent Rights pursuant to this Agreement, 
the other party shall, at the request and expense of the party initiating the suit, cooperate in all respects and, to the extent possible, 
have its employees testify when requested and make available relevant records, papers, information, samples, specimens, and the 
like.

8.7

If  Licensee  contests  the  validity  of  any  Patent  Rights,  unless  UFRF  terminates  this  Agreement  pursuant  to 
Section 9.4, Licensee shall continue to pay royalties and make other payments pursuant to this Agreement with respect to that 
patent as if the contest were not underway until the patent is adjudicated invalid or unenforceable by a court of last resort.

Section 9. Term and Termination

9.1

The  term  of  this  Agreement  begins  on  the  Effective  Date  and  continues  on  a  Licensed  Product  by  Licensed 
Product basis until the later of (i) the last to expire Valid Claim covering the Licensed Product, or (ii) ten (10) years from the First 
Commercial Sale of such Licensed Product.

9.2

Licensee  may  terminate  this  Agreement  at  any  time  after  the  fifth  (5th)  anniversary  of  the  Effective  Date  by 
giving at least sixty (60) days’ prior written notice to UFRF.  Licensee shall include a statement of the reasons for termination in 
the notice.

9.3

UFRF may terminate this Agreement by giving Licensee at least thirty (30) days’ written notice if Licensee:

(a)

Licensee ceases to use Commercially Reasonable Effort to carry on its business pertaining to 

Licensed Patents;

(b)

(c)

is in material breach of this Agreement;

knowingly provides any false report required to be delivered under this Agreement;

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(d)

(e)

of Licensed Products;

(f)

(g)

goes into bankruptcy, liquidation or proposes having a receiver control any of its assets;

materially violates any laws or regulations applicable to the development or commercialization 

ceases to carry on its business pertaining to Patent Rights;

fails  for  more  than  [**]  calendar  consecutive  quarters  to  make  payments  of  earned  royalties 

under Sections 4.3 and 4.4, once those royalty payments have begun; or

fails to provide UFRF with redacted copies of the Change Of Control documents within [**] of 
their execution.  Termination under this Section 9.3 takes effect [**] after written notice by UFRF, unless Licensee remedies the 
non-compliance in that [**] period, or an alternative cure period or extension of time is mutually agreed upon by the parties.

(h)

9.4

If Licensee or any of its Affiliates brings a Patent Challenge against UFRF or assists others in bringing a Patent 
Challenge  against  UFRF  (except  as  required  under  a  court  order  or  subpoena),  then  UFRF  may  immediately  terminate  this 
Agreement.  If a Sublicensee brings a Patent Challenge or assists another party in bringing a Patent Challenge (except as required 
under a court order or subpoena), then UFRF may send a written demand to Licensee to terminate the sublicense.

If Licensee fails to terminate the Sublicense within [**] after UFRF’s demand, UFRF may immediately terminate this 
Agreement.

9.5

Termination  of  this  Agreement  for  any  reason  does  not  release  either  party  from  any  obligation  that  matured 
prior to the effective date of termination.  Licensee remains obligated to provide an accounting for and to pay royalties earned.  
Licensee  may  prorate  any  minimum  royalties  that  are  due  as  of  the  date  of  termination  by  the  number  of  days  elapsed  in  the 
applicable calendar year.  Licensee and its Sublicensees may, however, during the [**] after the effective date of termination, sell 
all  Licensed  Products  that  are  in  inventory  and  complete  and  sell  Licensed  Products  that  are  in  the  process  of  manufacture 
provided that Licensee provides an accounting for and pays all earned royalties and other payments that are due under the terms 
of the Agreement.

9.6

Upon termination of the Agreement for any reason, the following sections of the License Agreement remain in 

force as non-cancelable obligations pursuant to their terms:

•

•

•

•

•

Section 6 Record Keeping; Accounting

Section 9.6 

Effect of Termination

Section 12 

Indemnification; Insurance

Section 13 

Use of Names

Section 14  Miscellaneous

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•

Section 17 

Confidentiality

9.7

In the event of a termination of this Agreement, if there is a Sublicensee in good standing under its sublicense, 
UFRF  shall  assume  the  Sublicense  on  the  same  terms  and  conditions  therein,  solely  to  the  extent  of  the  Licensed  Patents  and 
Licensed  Know-How;  provided,  that  under  no  circumstances  shall  UFRF  be  required  to  perform  any  obligation  under  the 
Sublicense that exceeds any obligation under this Agreement.

9.8

Licensee shall deliver to UFRF, within [**] after the date of termination of this agreement, complete and un-
redacted  copies  of  all  documentation  prepared  for  or  submitted  for  all  regulatory  approvals  of  Licensed  Products,  except  that 
Licensee may redact confidential information of any third parties.

Section 10. Assignability

10.1

This Agreement may not be transferred or assigned by Licensee except with the prior written consent of UFRF 
and payment of the Change of Control fee in Section 4.6.  Any attempted assignment in contravention of this Section 10.1 is void 
and constitutes a material breach of this Agreement.  Notwithstanding the foregoing, Licensee may assign the Agreement and/or 
its rights and/or obligations hereunder, upon informing UFRF, to an Affiliate or in the context of a merger of Change in Control 
or to a successor to all or substantially all of the business of Licensee to which this Agreement relates.

10.2

The  new  assignee  shall  assume  all  responsibilities  under  this  Agreement  and  agree  in  writing  to  UFRF  to  be 

bound by this Agreement.

Section 11. Dispute Resolution

11.1 Mandatory Procedures.  Before either party intends to file a lawsuit against the other with respect to any matter 
in connection with this Agreement, except with regard to any payments made or due under this Agreement, it shall first comply 
with the procedures set forth in this Section 11, other than for injunctive relief to enforce the provisions of this Section 11.

(a)

When  a  party  intends  to  invoke  the  procedures  set  forth  in  this  Section  11,  it  shall  provide 
written notice to the other party.  Within [**] after the date of that notice, senior representatives of the parties shall engage in 
good faith negotiations at a mutually convenient location to resolve the dispute.  In the case of UFRF, that representative is the 
Director of Technology Licensing.  In the case of License, that representative is the Head of Business Development or his/her 
designee.

If  the  parties  fail  to  meet  within  the  time  period  set  forth  in  Section  11(a)  or  if  either  party 
subsequently determines that negotiations between the representatives of the parties are at an impasse, the party declaring that the 
negotiations are at an impasse shall give notice to the other party stating with particularity the issues that remain in dispute.

(b)

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Officer of the Licensee shall meet and engage in good faith negotiations at a mutually convenient location to resolve the dispute.

(c)

Not more than [**] after the notice of issues, the President of UFRF and the Chief Executive 

11.2

Failure to Resolve Dispute.  If (a) any issue is not resolved at the meeting of the President and Chief Executive 
Officer within [**] after they first meet or (b) there is a dispute regarding payments made or due under this Agreement, either 
party  may  file  appropriate  administrative  or  judicial  proceedings  with  respect  to  the  issue  in  dispute.    The  parties  agree  to 
consider in good faith any proposals to address issues through alternative dispute resolution.

Section 12. Indemnification; Insurance

12.1

Licensee shall (and shall cause Sublicensees to), at all times during the term of this Agreement and thereafter, 
indemnify, defend and hold UFRF, the Florida Board of Governors, the University of Florida Board of Trustees, the University of 
Florida,  and  each  of  their  directors,  trustees,  officers,  employees,  and  agents,  the  Investigator,  and  the  inventors  of  the  Patent 
Rights, regardless of whether the inventors are employed by the University of Florida at the time of the claim, harmless against
all claims and liabilities, including legal expenses and reasonable attorneys’ fees, from a third party claim, arising out of the death 
of or injury to any person or persons or out of any damage to property and against any other claim, proceeding, demand, expense 
and liability resulting from the development, production, manufacture, sale, use, lease, consumption, marketing, or advertisement 
of  Licensed  Products  or  arising  from  any  right  or  obligation  of  Licensee  under  this  Agreement.    Notwithstanding  the  above, 
UFRF at all times reserves the right to retain counsel of its own at its own cost to defend the interests of UFRF, the Florida Board 
of Governors, the University of Florida Board of Trustees, the University of Florida, and the inventor(s).

12.2

Licensee warrants that it now maintains and will continue to maintain liability insurance coverage appropriate to 
the  risk  involved  in  developing,  producing,  manufacturing,  conducting  clinical  trials  for,  selling,  marketing,  using,  leasing, 
consuming, or advertising the products that are subject to this Agreement and that the insurance coverage lists UFRF, the Florida 
Board of Governors, the University of Florida Board of Trustees, the University of Florida, the Investigator, and the inventors of 
the  Patent  Rights  as  additional  insureds.    Within  [**]  after  the  execution  of  this  Agreement  and  thereafter  [**]  between  [**], 
Licensee will present evidence to UFRF that the coverage is being maintained.  In addition, Licensee shall provide UFRF with at 
least [**] prior written notice of any adverse change in or cancellation of the insurance coverage.

Section 13. Use of Names

Licensee  and  its  Sublicensee(s)  may  not  use  the  names  or  logos  of  UFRF  or  the  University  of  Florida,  nor  of  any  of 
either  institution’s  employees,  agents,  or  affiliates,  nor  the  name  of  any  inventor  of  Patent  Rights  or  Know-How,  nor  any 
adaptation of those names, in any promotional, advertising or marketing materials or any other form of publicity, or to suggest 
any endorsement by these entities or individuals, without the prior written approval of UFRF.

Section 14. Miscellaneous

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14.1

Governing Law.  This Agreement shall be governed and construed in accordance with the internal laws of the 
[**]  without  regard  to  its  conflict  of  laws  provisions,  and  venue  for  all  claims  or  other  causes  of  action  arising  out  of  this 
Agreement is [**].

14.2

Independent Contractors.  The parties are independent contractors and not joint ventures or partners.

14.3

Integration.  This Agreement constitutes the full understanding between the parties with reference to its subject 
matter,  and  no  statements  or  agreements  by  the  parties,  whether  oral  or  in  writing,  may  modify  the  terms  of  this  Agreement.  
Neither  party  may  claim  any  amendment,  modification,  or  release  from  any  provisions  of  this  Agreement,  unless  the  mutual 
agreement is in writing and signed by both parties.

14.4

No  Security  Interest.    Licensee  may  not  encumber  or  otherwise  grant  a  security  interest  in  any  of  the  rights 

granted under this Agreement to any third party.

14.5

Laws  and  Regulations.    Licensee  shall  comply  with  all  local,  state,  federal,  and  international  laws  and 

regulations that are applicable to the development, manufacture, use, and sale of Licensed Products, including:

Licensee  acknowledges  that  it  is  subject  to  and  agrees  to  abide  by  United  States  laws  and  regulations  (including  the 
Export Administration Act of 1979 and Arms Export Control Act) controlling the export of technical data, computer software, 
laboratory  prototypes,  biological  material,  and  other  commodities.    The  transfer  of  those  items  may  require  a  license  from  the 
cognizant  agency  of  the  United  States  Government  or  written  assurances  by  Licensee  that  it  will  not  export  items  to  certain 
foreign countries or persons without prior approval by that agency.  UFRF neither represents that a license is or is not required 
nor that, if required, it will be issued.

Licensee  shall  obtain  all  necessary  approvals  from  the  United  States  Food  &  Drug  Administration,  Environmental 
Protection  Agency,  Department  of  Agriculture  and  any  similar  governmental  authorities  of  foreign  jurisdictions  in  which 
Licensee intends to make, use, sell or perform Licensed Products

14.6 

Force Majeure.  Neither party is responsible for default, delay, or failure to perform, if such default, delay or 
failure to perform is due to causes beyond the party’s reasonable control, including, but not limited to, strikes, lockouts, inactions 
of  governmental  authorities,  war,  fire,  hurricane  or  other  natural  disaster,  provided  that  the  nonperforming  party  uses 
commercially  reasonable  efforts  to  avoid  or  remove  those  causes  of  nonperformance  and  continues  performance  under  this 
Agreement  with  reasonable  dispatch  when  the  causes  are  removed.    In  the  event  of  a  default,  delay  or  failure  to  perform 
described in this Section 14.6, any date or times by which either party is scheduled to perform is extended automatically for a 
time equal to the time lost by reason of the excused default, delay or failure to perform.

Section 15. Notices

The parties shall provide any notice required to be given pursuant to this Agreement in writing to the addresses listed in 

this Section 15.  Notice is effective on the day it is delivered 

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personally  with  written  receipt  from  an  authorized  signatory,  on  the  second  day  after  the  day  on  which  the  notice  has  been 
delivered for next day delivery prepaid to a nationally recognized courier service, on the fifth business day following deposit in 
the United States mail if sent certified or registered mail, (return receipt acknowledgement is not required to certify delivery).

If to UFRF:

If to Licensee:

President
University of Florida Research Foundation, Incorporated
223 Grinter Hall University of Florida
P. O. Box 115500
Gainesville, FL 32611-5500

nd

AavantiBio, Inc.
747 S.W. 2  Avenue, IMB31
Gainesville, FL 32611-5575
Attention: [**]

with a copy to:

UF Innovate | Tech Licensing

Attn: Director (Rm. 112)
747 SW 2nd Avenue
Post Office Box 115575
Gainesville, Florida 32611-5575

Section 16. Confidentiality

with a copy to:

Asher M. Rubin
Hogan Lovells US LLP
100 International Drive, Suite 2000
Baltimore, MD 21202
asher.rubin@hoganlovells.com

Unless required by Florida Law, the parties (a) may only use each other’s Confidential Information (as defined below) as 
necessary to perform the obligations set forth in this Agreement (b) may not disclose the other’s Confidential Information to any 
third party, and (c) shall protect each other’s Confidential Information with the same degree of care that they exercise with their 
own Confidential Information but in no event less than a reasonable degree of care.  The parties may disclose this Agreement and 
Confidential Information to their authorized Affiliates, directors, officers, employees, consultants, subcontractors, Sublicensees 
or  agents  and  investors  or  potential  investors  who  are  bound  by  similar  confidentiality  provisions.    For  the  purposes  of  this 
Agreement, “Confidential Information” means the terms of this Agreement and information disclosed by one party to the other 
that is marked “confidential” by the disclosing party or that is confirmed in writing within [**] after oral disclosure.  Confidential 
Information does not include information that (i) is publicly known; (ii) is already known or independently developed without use 
of  the  Confidential  Information  as  shown  by  written  records;  (iii)  is  disclosed  by  a  third  party  having  no  known  obligation  of 
confidentiality with respect to the Confidential Information; or (iv) is required to be disclosed to comply with applicable laws or 
regulations or with a court or administrative order.  These confidentiality obligations remain effective for [**] after disclosure of 
the Confidential Information.

Should any Investigator or individual working directly or indirectly under UFRF’s direction publish or present data or
experimental  results  related  to  the  Patent  Rights  or  Know-How  such  individual  shall  first  provide  a  copy  of  any  proposed 
disclosure (including any proposed 

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abstract  or  manuscript  for  submission)  to  UFRF  and  Licensee  for  review  at  least  [**]  prior  to  the  data  of  submission  for  the 
proposed  publication  or  presentation  for  public  disclosure.    At  Licensee’s  request,  any  reference  to  Licensee’s  Confidential 
Information  or  any  licensed  Know-How  shall  be  deleted.    If  Licensee  determines  that  information  is  included  in  the  proposed 
disclosure constitutes an Improvement or is otherwise information that is reasonably necessary or useful for commercialization of 
the Patent Rights, Licensee may request a deferral of the publication or disclosure to allow Licensee to file or have filed a patent 
application disclosing such information or Improvement, and UFRF shall defer the publication or disclosure for this period.

Section 17. University Rules and Regulations

Licensee  understands  and  agrees  that  University  of  Florida  personnel  who  are  engaged  by  Licensee,  whether  as 
consultants,  employees,  or  otherwise  or  who  possess  a  material  financial  interest  in  Licensee  are  subject  to  the  University  of 
Florida’s  rules  regarding  outside  activities  and  financial  interests  set  forth  in  University  of  Florida  Regulation  1.011,  the 
University  of  Florida’s  Intellectual  Property  Policy,  and  an  associated  monitoring  plan  which  addresses  conflicts  of  interests.  
Any term of an agreement between Licensee and University of Florida personnel which seeks to vary or override the personnel’s 
obligations to the University of Florida may not be enforced without the express written consent of an individual authorized to 
vary  or  waive  such  obligations  on  behalf  of  the  University  of  Florida  Board  of  Trustees  and  UFRF.    Furthermore,  should  an
interest  of  Licensee  conflict  with  the  interests  of  the  University  of  Florida,  University  of  Florida  personnel  are  obligated  to 
resolve those conflicts according to the rules, guidelines, and policies of the University of Florida.

Section 18. Contract Formation and Authority

18.1

The  submission  of  this  Agreement  is  not  an  offer,  and  this  document  is  effective  and  binding  only  upon  the 
execution by duly authorized representatives of both Licensee and UFRF.  Copies of this Agreement that have not been executed 
and  delivered  by  both  UFRF  and  Licensee  do  not  evidence  an  agreement  between  the  parties.    UFRF  may  terminate  this 
Agreement  without  the  requirement  of  any  notice  to  Licensee,  if  UFRF  does  not  receive  the  License  Issue  Fee  or  certificates 
representing  the  initial  Equity  Interests  to  be  issued  to  UFRF  pursuant  to  this  Agreement,  as  applicable,  within  [**]  of  the 
Effective Date.

18.2

UFRF  and  Licensee  hereby  warrant  and  represent  that  the  persons  signing  this  Agreement  have  authority  to 

execute this Agreement on behalf of the party for whom they have signed.

[signature page follows]

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The parties have duly executed this Agreement on the dates indicated below.

UNIVERSITY OF FLORIDA RESEARCH
FOUNDATION, INCORPORATED

AAVANTI BIO, INC.

By: /s/ Jim O’Connell
Jim O’Connell
Assistant Vice President for
Commercialization
Director, UF Innovate | Tech Licensing

By: /s/ Phil Johnson
Phil Johnson
Title: Director

Date: 3/19/2020

Date: 3/19/2020

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Appendix E - Exclusive License Agreement to Aavanti [**]/A19110

Incorporated by reference to Exhibit 10.42 to the Company’s Form 10-K for the fiscal year ended December 31, 2022 as 

filed with the Securities and Exchange Commission on March 23, 2023.

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FIRST AMENDMENT TO
LICENSE AGREEMENT NO. A19111

WHEREAS, the University of Florida Research Foundation, Inc., a not-for-profit corporation duly organized and existing under 
the laws of the State of Florida and having its principal office at 223 Grinter Hall, Gainesville, Florida 32611 U.S.A. (hereinafter 
referred to as “UFRF), and AavantiBio, Inc., a Delaware corporation having its principal office/place of business at 747 SW 2nd 
Ave., Suite 195, IMB31, Gainesville, FL, 32601 (hereinafter referred to as “Licensee”) entered into a Standard Exclusive License 
Agreement (Agreement No: A19111) dated 17 March 2020 (hereinafter “License Agreement”);

WHEREAS, the parties now wish to amend the License Agreement by this amendment (hereinafter referred to as “First 
Amendment”);

NOW THEREFORE, in consideration of the premises and mutual covenants contained herein the parties hereto agree as follows;

1.

2.

3.

4.

5.

6.

Capitalized terms not defined in this First Amendment shall have the meanings ascribed to them in the License 
Agreement.

The parties wish to update the Patent Rights listed in Appendix A of the License Agreement.  Appendix A will be 
replaced by this New Appendix A.

New Appendix A - Patent Rights and Know-How:

[**] 

This First Amendment will be effective upon payment of a one-time fee of $[**] payable within [**] of execution of this 
First Amendment.

All other provisions of the License Agreement shall remain in full force and effect and unmodified by this First 
Amendment.

This First Amendment, together with the License Agreement, sets forth the entire agreement and understanding of the 
parties as to the subject matter hereof and supersedes all proposals, oral or written, and all other communications 
between the parties with respect to such subject matter.

This First Amendment shall be executed in duplicate.  This First Amendment may be executed in two (2) or more 
counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same 
instrument.

IN WITNESS WHEREOF, the parties intending to be bound have caused this First Amendment to be executed by their 

duly authorized representatives.

UNIVERSITY OF FLORIDA
RESEARCH FOUNDATION, INC.

AAVANTIBIO, INC.

 
 
 
 
 
 
 
By: /s/ Jim O’Connell

Jim O’Connell
Director UF Innovate | Tech Licensing

Date: 5/21/2021

By: /s/ Bo Cumbo

Bo Cumbo
Title: CEO

Date: 5/25/2021

REVIEWED
BY LEGAL

___________

 
 
 
 
 
 
 
 
 
 
 
 
SECOND AMENDMENT TO
LICENSE AGREEMENT NO. A19111

WHEREAS, the University of Florida Research Foundation, Inc., a not-for-profit corporation duly organized and existing under 
the laws of the State of Florida and having its principal office at 223 Grinter Hall, Gainesville, Florida 32611 U.S.A. (hereinafter 
referred to as “UFRF), and AavantiBio, Inc., a Delaware corporation having its principal office/place of business at 747 SW 2nd 
Ave., Suite 195,

IMB31, Gainesville, FL, 32601 (hereinafter referred to as “Licensee”) entered into a Standard Exclusive License Agreement 
(Agreement No: A19111) dated 17 March 2020 and amended by the First Amendment on 25 May 2021 (hereinafter collectively 
“License Agreement”);

WHEREAS, the parties now wish to amend the License Agreement by this amendment (hereinafter referred to as “Second 
Amendment”);

NOW, THEREFORE, in consideration of the premises and mutual covenants contained herein, the parties hereto agree as 
follows:

1.

2.

3.

4.

5.

6.

Capitalized terms not defined in this Second Amendment shall have the meanings ascribed to them in the License 
Agreement.

The parties wish to update the estimated milestones set forth in Appendix B.  Appendix B will be replaced by the New 
Appendix B attached to this Second Amendment and incorporated herein by reference.

The parties wish to update the milestone for the first commercial sale.  The parties agree to delete paragraph 3.2 (a) in its 
entirety and replace it with the following:

3.2 (a) Licensee shall use Commercially Reasonable Effects to achieve the estimated milestones set forth in the New 
Appendix B attached to the Second Amendment and estimates that the first commercial sale of the first Licensed Product 
will occur on or before [**].

All other provisions of the License Agreement shall remain in full force and effect and unmodified by this Second 
Amendment.

This Second Amendment, together with the License Agreement, sets forth the entire agreement and understanding of the 
parties as to the subject matter hereof and supersedes all proposals, oral or written, and all other communications 
between the parties concerning such subject matter.

The parties may execute this Second Amendment in one or more counterparts, each of which is an original and all of 
which together are the same instrument.  Delivery of a signed Second Amendment by reliable electronic means, 
including email, shall be an effective method of delivering the executed Second Amendment.  This Second Amendment 
may be stored by electronic means, and either an original or an electronically stored copy of this Second Amendment 
can be used for all purposes, 

28

 
 
including in any proceeding to enforce the rights and/or obligations of the parties to this Second Amendment.

[Signatures to follow on next page]

29

 
 
IN WITNESS WHEREOF, the parties intending to be bound have caused this Second Amendment to be executed by their duly 
authorized representatives.

UNIVERSITY OF FLORIDA
RESEARCH FOUNDATION, INC.

AAVANTIBIO, INC.

By: /s/ Jim O’Connell

Jim O’Connell
Director UF Innovate | Tech Licensing

Date: 8/9/2022

By: /s/ Bo Cumbo

Bo Cumbo
Title: President and CEO

Date: 8/8/2022

REVIEWED
BY LEGAL

___________

30

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Subsidiaries of Solid Biosciences Inc.

Name of Subsidiary
AavantiBio, Inc.

Solid Biosciences Securities Corporation

Exhibit 21.1

Jurisdiction of Organization

Delaware

Massachusetts

 
 
   
   
 
 
 
 
 
 
 
 
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-269424, 333-258859, 333-254310 and 333-
233594) and Form S-8 (No. 333-269162, 333-268643, 333-265351, 333-258856, 333-241370 and No. 333-222763) of Solid Biosciences Inc. of our report 
dated March 23, 2023 relating to the financial statements, which appears in this Form 10-K.

Exhibit 23.1

/s/ PricewaterhouseCoopers LLP
Boston, Massachusetts
March 23, 2023

 
 
 
CERTIFICATION OF PERIODIC REPORT UNDER SECTION 302 OF 
THE SARBANES-OXLEY ACT OF 2002 

Exhibit 31.1

I, Alexander Cumbo, certify that: 

1. I have reviewed this Annual Report on Form 10-K of Solid Biosciences Inc.; 

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the 
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the 
financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange 
Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the 
registrant and have: 

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that 
material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly 
during the period in which this 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 23, 2023

By:

/s/ Alexander Cumbo

Alexander Cumbo

President and Chief Executive Officer
(Principal Executive Officer)

 
 
 
  
 
 
  
  
 
 
  
 
 
CERTIFICATION OF PERIODIC REPORT UNDER SECTION 302 OF 
THE SARBANES-OXLEY ACT OF 2002 

Exhibit 31.2

I, Kevin Tan, certify that: 

1. I have reviewed this Annual Report on Form 10-K of Solid Biosciences Inc.; 

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the 
statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the 
financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report; 

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange 
Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the 
registrant and have: 

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that 
material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly 
during the period in which this 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 23, 2023

By:

/s/ Kevin Tan

Kevin Tan

Chief Financial Officer
(Principal Financial and Accounting Officer)

 
 
 
  
 
 
  
  
 
 
  
 
 
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO 
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 

Exhibit 32.1

In connection with the Annual Report of Solid Biosciences Inc. (the “Company”) on Form 10-K for the year ended December 31, 2022 as filed with 

the Securities and Exchange Commission on the date hereof (the “Report”), I, Alexander Cumbo, Chief Executive Officer of the Company, certify, 
pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge: 

(1)

(2)

The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 

The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the 
Company. 

Date: March 23, 2023

By:

/s/ Alexander Cumbo

Alexander Cumbo

President and Chief Executive Officer
(Principal Executive Officer)

 
 
 
  
 
 
  
  
 
 
  
 
 
CERTIFICATION PURSUANT TO 
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO 
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 

Exhibit 32.2

In connection with the Annual Report of Solid Biosciences Inc. (the “Company”) on Form 10-K for the year ended December 31, 2022 as filed with 

the Securities and Exchange Commission on the date hereof (the “Report”), I, Kevin Tan, Chief Financial Officer of the Company, certify, pursuant to 18 
U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge: 

(1)  The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 

(2)  The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the 

Company. 

Date: March 23, 2023

By:

/s/ Kevin Tan

Kevin Tan

Chief Financial Officer
(Principal Financial and Accounting Officer)