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Synlogic

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

FORM 10-K 

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

For the fiscal year ended December 31, 2023

OR 

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

TRANSITION PERIOD FROM                      TO                     

Commission File Number 001-37566

SYNLOGIC, INC.

(Exact name of Registrant as specified in its Charter) 

Delaware
(State or other jurisdiction of
incorporation or organization)

301 Binney St., Suite 402
Cambridge, MA 
(Address of principal executive offices)

26-1824804
(I.R.S. Employer
Identification No.)

02142
(Zip Code)

(617) 401-9975

(Registrant’s telephone number, including area code)

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

Title of each class

Common Stock, par value $0.001 per share

Trading Symbol

SYBX

Name of exchange on which registered

The Nasdaq Capital Market

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

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    YES  ☐    NO  ☒ 
Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the 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, 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 Exchange Act).    YES  ☐    NO  ☒
The aggregate market value of common stock held by non-affiliates of the registrant as of June 30, 2023, the last business day of the registrant’s most recently completed second quarter, was $23.6 million, 
computed based on the closing price of $6.45 per share on June 30, 2023.   
As of March 12, 2024 there were 11,646,977 shares of the registrant’s common stock, par value $0.001 per share, outstanding.

   Accelerated filer
   Small reporting company

  ☐
  ☒

DOCUMENTS INCORPORATED BY REFERENCE

The following documents (or parts thereof) are incorporated by reference into the following parts of this Form 10-K: Certain information required in Part III of this Annual Report on Form 10-K is 
incorporated from the registrant’s definitive proxy statement for the 2023 annual meeting of stockholders to be filed pursuant to Regulation 14A with the Securities and Exchange Commission within 120 
days of the registrant’s fiscal year ended December 31, 2023.
185

Boston, Massachusetts, U.S.

Auditor Location:

Auditor Firm Id:

Auditor Name: 

KPMG LLP

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PART I
Item 1.
Item 1A.
Item 1B.
Item 1C.
Item 2.
Item 3.
Item 4.

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

PART III
Item 10.
Item 11.
Item 12.
Item 13.
Item 14.

PART IV
Item 15.
Item 16.

Table of Contents

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

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

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

Exhibits, Financial Statement Schedules
Form 10-K Summary

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FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains forward-looking statements that involve risks and uncertainties. We make such forward-looking 
statements pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995 and other federal securities laws. All statements 
other than statements of historical facts contained herein are forward-looking statements. In some cases, you can identify forward-looking statements by 
terminology such as “may,” “will,” “should,” “expects,” “intends,” “plans,” “anticipates,” “believes,” “estimates,” “predicts,” “potential,” “continue” or the 
negative of these terms or other comparable terminology. These forward-looking statements include, but are not limited to, statements about:

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our evaluation of strategic alternatives with a goal to enhance stockholder value, including the possibility of a merger or a sale of the 
Company;

the success of our research and development efforts;

the initiation, progress, timing, costs and results of clinical trials for our product candidates;

the time and costs involved in obtaining regulatory approvals for our product candidates;

the success of our collaborations with third parties;

the progress, timing and costs involved in developing manufacturing processes and in manufacturing products, as well as agreements 
with third-party manufacturers;

the rate of progress and cost of our commercialization activities;

the expenses we incur in marketing and selling our product candidates, if approved;

the revenue generated by sales of our product candidates, if approved;

the emergence of competing or complementary technological developments;

the terms and timing of any additional collaborative, licensing or other arrangements that we may establish;

the acquisition of businesses, products and technologies;

our need to implement additional infrastructure and internal systems;

our need to add personnel and financial and management information systems to support our product development and potential future 
commercialization efforts, and to enable us to operate as a public company; 

the extent to which our business is adversely impacted by the effects of the coronavirus outbreak (COVID-19) or by other health 
epidemics or pandemics; and

other risks and uncertainties, including those listed under Part I, Item 1A. “Risk Factors.”

Any forward-looking statements in this Annual Report on Form 10-K reflect our current views with respect to future events or to our future financial 

performance and involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be 
materially different from any future results, performance or achievements expressed or implied by these forward-looking statements. Factors that may 
cause actual results to differ materially from current expectations include, among other things, those listed under Part I, Item 1A. “Risk Factors” and 
elsewhere in this Annual Report on Form 10-K. Given these uncertainties, you should not place undue reliance on these forward-looking statements. 
Except as required by law, we assume no obligation to update or revise these forward-looking statements for any reason, even if new information becomes 
available in the future.

This Annual Report on Form 10-K also contains estimates, projections and other information concerning our industry, our business, and the markets 
for certain diseases, including data regarding the incidence and prevalence of certain medical conditions. Information that is based on estimates, forecasts, 
projections, market research or similar methodologies is inherently subject to uncertainties and actual events or circumstances may differ materially from 
events and circumstances reflected in this information. Unless otherwise expressly stated, we obtained this industry, business, market and other data from 
reports, research surveys, studies and similar data prepared by market research firms and other third parties, industry, medical and general publications, 
government data and similar sources.

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Item 1. Business. 

Overview 

PART I

We are a biopharmaceutical company advancing novel therapeutics to transform the care of serious diseases. We focus on rare metabolic disorders, 
with our lead program, labafenogene marselecobac (SYNB1934), studied in Synpheny-3, a global, pivotal Phase 3 study for patients with phenylketonuria 
(PKU), and SYNB1353, a potential treatment for homocystinuria (HCU). Both PKU and HCU are caused by inborn errors of metabolism, and present 
significant need for innovation due to limitations of both efficacy and safety in the currently available medical treatment options.  

In February 2024, we made the decision to discontinue Synpheny-3, our pivotal study of our lead product candidate, labafenogene marselecobac 

(SYNB1934), as a potential treatment for PKU.  The decision to end Synpheny-3 is based on results of an internal review in advance of an upcoming 
independent Data Monitoring Committee (DMC) assessment, which indicated the trial was unlikely to meet its primary endpoint. The decision was not 
based on concerns regarding safety or tolerability. We will now work with the Synpheny-3 clinical trial sites involved to implement the discontinuation. As 
a result, our current corporate strategy is focused on pursuing strategic initiatives to enhance stockholder value, including but not limited to, a merger or the 
sale of the Company. Our strategic process is both active and ongoing and includes a range of interactions with transaction counterparties. Thus, we believe 
it is in our stockholders’ best interest to allow sufficient opportunity to pursue and consummate one or more such transactions and to consider additional 
alternatives that may materialize in the future. However, there can be no assurance that such activities will result in any agreements or transactions that will 
enhance shareholder value. Further, any strategic transaction that is completed ultimately may not deliver the anticipated benefits or enhance shareholder 
value.

Our early-stage pipeline includes product candidates for enteric hyperoxaluria, gout, and cystinuria, and has been fueled by a reproducible, 
proprietary approach that creates GI-restricted, oral medicines with new enzymatic pathways designed to consume or produce specific biological targets.  
We design, develop and manufacture these drug candidates, which are produced by applying genetic engineering to well-characterized probiotics.  

 Our drug candidates are designed through precise engineering to target validated biological pathways in the pathophysiology of a given disease. By 

using a probiotic to deliver these new enzymatic pathways, the activity is restricted to the gastrointestinal (GI) tract, avoiding systemic exposure and 
associated risks that limit the success of other modalities.  Our pipeline programs are all based on the same probiotic Escherichia coli Nissle 1917, which 
provides synergies across programs, as well as more than one hundred years of human dosing experience.  Our drug candidates are engineered to be non-
colonizing, and fully reversible via GI clearance. These potential biopharmaceuticals are all orally administered, conducive to straightforward shipping, 
distribution and storage. For manufacturing, our platform leverages processes with familiar foundations, including fermentation and lyophilization, 
facilitating process design and scale-up, combined with unique and proprietary innovations tailored to our unique products.

Since our founding, based upon technology from the Massachusetts Institute of Technology (MIT) in 2014, we have progressed a pipeline of 

multiple drug candidates across different stages, including:

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Labafenogene marselecobac (SYNB1934), which was being studied in Synpheny-3, a pivotal, Phase 3 study for the treatment of patients with 
PKU;

SYNB1353, a potential treatment for HCU, has achieved proof of mechanism in a Phase 1 study in healthy volunteers;

Preclinical research activities on a potential drug candidate for cystinuria, a rare, genetic cause of recurrent kidney stones which is also 
caused by an underlying metabolic disorder;

SYNB2081, a drug candidate for gout which is in IND-enabling studies; and

Preclinical research focused on novel, locally-acting, GI-restricted biotherapeutics for indications in inflammatory bowel disease (IBD). 

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Strategy 

As announced in February 2024, our current corporate strategy is focused on pursuing strategic initiatives to enhance stockholder value, including 
by exploring a range of alternatives including but not limited to a merger or the sale of the Company. Our strategic process is both active and ongoing and 
includes a range of interactions with transaction counterparties. Thus, we believe it is in our stockholders’ best interest to allow sufficient opportunity to 
pursue and consummate one or more such transactions and to consider additional alternatives that may materialize in the future. However, there can be no 
assurance that such activities will result in any agreements or transactions that will enhance shareholder value. Further, any strategic transaction that is 
completed ultimately may not deliver the anticipated benefits or enhance shareholder value. 

In February 2024, we made the decision to discontinue Synpheny-3, our pivotal study of our lead product candidate, labafenogene marselecobac 

(SYNB1934), as a potential treatment for PKU. Historically, our mission was to treat diseases underserved by other modalities by researching, developing 
and commercializing new medicines. 

Our Pipeline: Synthetic Biotics in Clinical Development

Our product pipeline consists of drug candidates targeting significant medical needs caused by an underlying metabolic disorder. These include 

labafenogene marselecobac, which was being evaluated in a pivotal, Phase 3 study in PKU, and drug candidates designed to treat HCU, enteric 
hyperoxaluria, and gout. Our preclinical work includes additional metabolic disease research, including cystinuria, target exploration, and focused research 
efforts in IBD.

Clinical Pipeline: Focus on Rare Metabolic Diseases

Rare metabolic diseases often result from inherited defects or alterations in specific enzymes or other biological pathways that normally break down 

or produce important metabolites or molecules. In patients with these diseases, the absence or impairment of certain enzymes causes potentially toxic 
metabolites to accumulate. In patients with PKU and HCU, the build-up of these metabolites can reach toxic levels, resulting in life-threatening medical 
risks and/or serious developmental delays, life-altering disease burden and symptoms. While there are approved and available pharmaceutical products for 
both diseases, they present significant limitations in terms of both safety and efficacy, leaving patients often under-managed, attempting to control their 
disease through a restrictive regimen of diet, medical formula and medical foods, and/or experiencing significant symptoms or risk of dangerous 
complications.  

Market Opportunity

In addition to significant need for new medical treatments, we believe rare metabolic diseases PKU and HCU present advantages as target 

therapeutic areas for investment. Despite their limitations, the approved treatments for these diseases provide useful precedent in terms of both clinical 
development paths and navigating regulatory processes including approval. For example, in both PKU and HCU, existing treatments were approved by 
global regulators based on clinical biomarkers as the primary endpoint in their pivotal, registrational trials, sufficient for full approval. All of the metabolic 
diseases that we target in our current pipeline also 

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have the benefit of a dietary model, in which there is already a standard dietary intervention to reduce the target metabolite (e.g. avoiding protein in the 
case of PKU to lower Phe levels, or methionine in the case of HCU, or uric acid for gout). These existing dietary interventions provide a useful model by 
demonstrating that GI-based means of lowering metabolite levels to provide therapeutic benefit.  

From a commercial perspective, these rare metabolic diseases have been well-characterized, and while limited in uptake due to their limitations, 

the currently available products have provided commercial validation. In PKU for example, the two approved products, Kuvan and Palynziq, have 
generated $500 million and $300 million respectively, in annual revenue as branded agents, translating to a market opportunity we estimate to be more than 
$3 billion. For HCU, with an estimated 5,000 patients globally, we estimate a potential market opportunity to be more than $1 billion. 

Further, these two disease states present significant synergies as target indications. PKU and HCU patients are largely both treated by the same, 

concentrated and group of specialist clinicians at metabolic clinics, facilitating both late-stage development and commercialization, given the overlap in 
key opinion leaders (KOLs), medical meetings and congresses, as well as call points for sales and marketing, market access and patient support 
programming. 

Our PKU Program

Our lead product candidate, labafenogene marselecobac (SYNB1934), which was being evaluated in Synpheny-3, a privotal Phase 3 study, is 

designed to consume phenylalanine (Phe) through engineered enzymes produced within the probiotic, E. coli Nissle. Labafenogene marselecobac has 
received Orphan Drug Designation (ODD), Fast Track designation, and Rare Pediatric Disease Designation (RPDD) from the FDA in addition to orphan 
designation from the European Medicines Agency (EMA). In 2023 we announced that the International Nonproprietary Names (INN) Expert Committee of 
the World Health Organization (WHO-INN) has selected "labafenogene marselecobac" for the nonproprietary name of SYNB1934, reflecting a naming 
framework for genetically engineered bacteria, in which the first name references the gene being designed or modified (in this case, one for Phe or “fe”), 
and the second references the bacteria (“bac”). 

The Science of PKU

PKU is an inherited metabolic disease caused by genetic mutations that impair the function of the enzyme, phenylalanine hydroxylase (PAH), 
which normally metabolizes phenylalanine (Phe), an amino acid found in all protein-containing foods, including all meat and dairy products, most beans, 
grains and potatoes, as well as some artificial sweeteners.  Without functioning PAH, uncontrolled Phe levels in PKU can be neurotoxic, interfering with 
normal brain development during childhood, causing permanent developmental disabilities; severely elevated Phe levels at any age can result in 
neurocognitive symptoms such as slower cognition, difficulty concentrating or “brain fog.” 

Reducing the risk of complications and neurocognitive symptoms in PKU patients requires lifelong control of Phe levels. During the 1960’s, 
countries began newborn screening to ensure that Phe control was implemented immediately through a highly restrictive, low-Phe diet accompanied by 
supplemental formula for needed amino acids to avoid permanent, severe intellectual disability. Per E.U. and U.S. guidelines, any newborn infant with a 
plasma Phe concentration of >400–600 μM should be started on a low-Phe diet as soon as possible. The diet includes extreme restrictions of natural foods 
to keep daily protein at levels that are often as low as 4-6 grams per day for adults. This generally includes elimination of all sources of animal protein and 
dairy, legumes and nuts, and limited intake of bread, pasta, rice and some vegetables. Low-protein bread and pasta products made from starch are used to 
provide needed energy. The dietary regimen required also includes the addition of amino acid-based, Phe-free formula or other specific medical foods to 
provide adequate protein, vitamins, minerals and energy.

It is challenging for persons to adhere to this restricted diet and its associated requirements create significant burdens on quality of life for both 

patients and caregivers. Access to low protein foods can pose difficulties as they are costlier and less nutritious than their higher protein, non-modified 
equivalents, and the needed formula can also be costly or otherwise difficult to access. As a result, the vast majority of people living with PKU, and 
especially adults living independently, have Phe levels well above the recognized targets. 

It is estimated that there are more than 150,000 people diagnosed with PKU living across the United States, Europe and Asia. They are typically 

diagnosed through newborn screening. Of these, the vast majority remain untreated, reflecting the limitations of current treatment options.

Limitiations of Current PKU Treatment Options

There are currently two medications been approved by the FDA, EMA, and other regulatory agencies globally as medical treatments for PKU 
based on safety and efficacy in reduction of plasma Phe levels. These approved medications provide important and helpful examples and precedents for 
clinical development and regulatory processes.  Each one however, has drawbacks limitations leave the majority of people with PKU living without a 
medical treatment for Phe reduction. These limitations are outlined below: 

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Sapropterin dihydrochloride (Kuvan®), a biopterin, was approved by the FDA in 2017, and is now available as a generic in the United States 
and other markets in tablet and sachet formulations.  Sapropterin works by stimulating the PAH enzyme to process Phe in people with PKU.  
This requires having residual PAH enzyme, and responding to tetrahydrobiopterin (BH4).  Typically only a minority of PKU patients will 
demonstrate BH4-responsiveness, and as a result, the use of Kuvan has been limited to an estimated 15%-20% of U.S. patients.  Reflecting 
the size of the overall patient population, despite this low use, Kuvan generated ~$500 million per year globally for BioMarin 
Pharmaceutical, Inc. prior to genericization. Of those who do respond and maintain treatment with sapropterin, we believe a significant 
proportion would still benefit from additional Phe-lowering, and see this segment as an important opportunity for labafenogene marselecobac 
as an adjunctive medical treatment option.

Palynziq® Injection (pegvaliase-pqpz) was approved by the FDA in 2018 for adult patients with PKU and uncontrolled blood Phe. Due to 
instability and other complexities, the PAH enzyme that is impaired in PKU is not a viable candidate for enzyme replacement therapy. 
Palynziq is a pegylated form of recombinant phenylalanine ammonia lyase (PAL), a non-mammalian enzyme that also metabolizes Phe. 
Safety considerations include risk of severe allergic reactions, including a 10% risk of anaphylaxis, resulting in FDA labeling that includes a 
boxed warning and requirement to carry auto-injectable epinephrine at all times while they are taking the medication. Despite these 
challenges, Palynziq is forecast to generate $300 million in 2023, largely from the United States, despite maintaining an estimated ~10% 
market share. 

Given the limitations of sapropterin in terms of responder rates, and the safety challenges of Palynziq, we believe the approved therapies’ 

limitations leave a large majority of those living with PKU in need of an orally-administered medical treatment option that provides Phe-lowering efficacy 
with an acceptable safety and tolerability profile.

Labafenogene marselecobac for PKU

Labafenogene marselecobac is designed to treat PKU and lower Phe levels through the engineering of two Phe-consuming enzymes: L-amino 
acid deaminase (LAAD) and phenylalanine ammonia lyase (PAL), produced by a strain of E. coli Nissle, which also includes a Phe transporter, PheP, to 
bring Phe into the cell. The drug candidate thustargets Phe from dietary sources, and Phe that has circulated to the GI tract via enterorecirculation.

This design enables a patient-friendly product presentation: it is provided to patients as powder for mixing with water or juice, taken with with 

meals. This product presentation is familiar to PKU patients, as sapropterin is provided as a sachet, and often their nutritional supplemental formula 
requires mixing with liquid.

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Labafenogene marselecobac was engineered as a next-generation version of first-generation PKU drug candidate SYNB1618, by modifying five 

amino acids in PAL, which increased productivity of PAL’s conversion of Phe to the metabolic byproduct trans-Cinnamic acid (TCA). A detailed 
description of the engineering of SYNB1618 and data from preclinical studies in an animal model of disease and healthy non-human primates was 
published in 2018 (Nat. Biotechnol. 36, 857–864 (2018)), and an overview of the engineering and early development of SYNB1934 was published in 2021 
(Nat Commun. 12, 6215 (2021)). 

In Phase 1 studies of healthy volunteers, both SYNB1618 and labafenogene marselecobac were found to be safe and well-tolerated at doses up to 

2x1012 live cells administered three times a day for seven days. Higher doses were associated with mild to moderate gastrointestinal symptoms, mainly 
nausea and vomiting. In July 2019, we announced data that demonstrated that SYNB1618 was safe and well-tolerated and achieved proof-of-mechanism of 
strain activity in both healthy volunteers and patients with PKU. Improved tolerability of the lyophilized SYNB1618 over the early liquid formulation 
enabled us to determine a maximally tolerated dose (MTD) to take forward to test in patients. In September 2021, we announced that Phase 1 results in 
healthy volunteers and predictive modeling indicate labafenogene marselecobac may have greater potency than SYNB1618. 

In October 2022, we shared positive top-line results from the Phase 2 Synpheny-1 study that demonstrated proof of concept in PKU patients for 

both candidates, and confirmed greater potency of the next-generation labafenogene marselecobac , the candidate that we have selected to advance to 
pivotal Phase 3 studies. The complete results were presented at the Society for Inherited Metabolic Disorders (SIMD) Annual Meeting in March 2023 and 
published in the journal Nature Metabolism in September 2023. Results presented included successfully meeting the primary endpoint (change in area 
under the curve of D5-Phe following a meal challenge) for SYNB1618 and labafenogene marselecobac. Results for labafenogene marselecobac included a 
-40% mean reduction in plasma Phe levels for labafenogene marselecobac, and -53% among those considered responders (with >20% reduction from 
baseline). 60% of patients achieved the >20% criteria for Phe reduction considered the threshold for a clinically meaningful response. The study also 
included experience with both candidates when provided in combination for patients who were already taking sapropterin (Kuvan) at baseline, indicating 
the potential for adjunctive medical treatment. Safety and tolerability findings were consistent with prior 

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experience and favorable, with no serious adverse events (SAE) across the PKU program, and those adverse events that did occur being predominantly GI 
in nature. 

In June 2023 we announced the initiation of Synpheny-3. Its design was informed by input from global regulatory agencies, clinicians and 

patients, and the precedent of pivotal studies from already approved drugs.

The study was a randomized, placebo-controlled, global, pivotal Phase 3 clinical trial designed to evaluate the efficacy and safety of SYNB1934 
as a treatment for PKU. The primary endpoint was the change in phenylalanine (Phe) levels from baseline for SYNB1934 compared to placebo, in a subset 
of patients who are considered responders (defined as >20% reduction in Phe).   

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The trial consisted of three parts: Part 1, an open-label dose escalation period, during which patients titrate through up to three dose levels, with 

at least three weeks per dose; Part 2, a four-week randomized withdrawal period used for the pivotal analysis; and Part 3, an open-label extension which 
includes an evaluation of Phe tolerance, or dietary liberalization.

In February 2024, we made the decision to discontinue Synpheny-3, our pivotal study of our lead product candidate, labafenogene marselecobac 

(SYNB1934), as a potential treatment for PKU.  The decision to end Synpheny-3 is based on results of an internal review in advance of an upcoming 
independent Data Monitoring Committee (DMC) assessment, which indicated the trial was unlikely to meet its primary endpoint. The decision was not 
based on concerns regarding safety or tolerability.

Our HCU Program

In November 2021 we announced the nomination of SYNB1353, a novel, orally administered, non-systemically absorbed drug candidate 

designed to lower plasma levels of homocysteine (Hcy) in patients with HCU by consuming methionine (Met), a precursor to Hcy. We also shared at that 
time that mechanistic modeling data suggests that SYNB1353 may lower plasma Hcy by up to 58% and may increase protein intake in HCU patients.

In November 2022, we announced that proof of mechanism was achieved with SYNB1353 through positive results in the Phase 1 study of 

healthy volunteers using a dietary model of HCU, in which we showed the translation from SYNB1353’s activity in the GI tract to a lowering of plasma 
levels of Met.  SYNB1353 has received Fast Track, Orphan Drug, and Rare Pediatric Disease Designations from the FDA as a potential treatment for HCU.  

Science of HCU

HCU is a rare inherited metabolic disorder that affects the metabolism of the amino acid methionine (Met), a protein found in many foods 
including meat, fish, and dairy products. HCU is caused by a genetic defect which results in the absence of an enzyme known as cystathionine beta-
synthase (CBS). When CBS is absent, Hcy and other toxic chemicals and their byproducts, including Met, build up in the blood and urine. In HCU, 
elevated total homocysteine (tHcy) levels are associated with a multisystem disorder, including impairments of the eye (ectopia lentis and/or severe 
myopia), skeletal system (excessive height, long limbs, scoliosis, pectus excavatum), vascular system (thromboembolism), and CNS (development delay 
and intellectual disability). The goal in treating HCU 

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is to reduce and control levels of tHcy, thereby reducing risk of acute, potentially life-threatening blood clots and chronic, multisystem complications. 

There is currently no cure for HCU and treatment options are limited. Patients must follow a rigid diet low in protein to avoid dietary Met intake. 

Other therapeutic approaches include vitamin supplements to minimize some of the disease side effects. Approximately 5,000 individuals in the United 
States and Europe suffer from CBS or “Classical” HCU.

Limitations of Current HCU Treatments

Approved pharmacological treatment options for HCU are limited due to efficacy and tolerability. People with more mild phenotypes of HCU 

typically respond effectively to, and are sufficiently managed by, taking Vitamin B6 (also known as pyridoxine-responsive). Non-responders require a 
combination of betaine (brand name Cystadane®) and a moderate to severe dietary Met restriction. The severely protein-restricted diet is complex and 
challenging for long-term adherence. Compliance with treatment often deteriorates, particularly in adolescence, as in other disorders requiring dietary 
adherence. Patients report significant challenges with the burden of the low protein diet, intake of amino acid mixtures, and the palatability of protein 
substitutes as well as betaine. Reaching tHcy treatment targets remains a challenge despite existing pharmacotherapies. 

SYNB1353 for HCU

A diet low in Met, a precursor to Hcy, is standard treatment for lowering tHcy levels in patients with HCU. This dietary model provided the 
scientific rationale for SYNB1353, which was engineered to produce an enzymatic pathway to metabolize Met, and thus lower plasma levels of tHcy. 
SYNB1353 metabolizes Met via the methionine decarboxylase (MetDC) enzymatic pathway, which prevents the conversion of Met into Hcy, thereby 
lowering tHcy in HCU patients and reducing risk of complications. SYNB1353 is taken as an orally administered, non-systemically absorbed live 
biotherapeutic drug candidate that, like our PKU drug candidates, is provided as a lyophilized powder in a sachet, to be orally administered with meals 
three times a day. We hold 

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worldwide development and commercialization rights to SYNB1353, which was developed as part of our research collaboration with Ginkgo.  

In November 2022, we announced that proof of mechanism was achieved with SYNB1353 through positive results in the Phase 1 study of 

healthy volunteers using a dietary model of HCU. Top-line results demonstrated that SYNB1353 reduced in plasma Met when measured over 24 hours as 
area under the curve (AUC) following a Met meal challenge. SYNB1353 was generally well tolerated, and adverse events (AEs) were all mild to moderate, 
transient, and predominantly GI in nature. The frequency and severity of GI-related AEs were similar in the active and control group. During 2023, we 
conducted fermentation process improvements that successfully further increased activity of methionine degradation for SYNB1353.

Clinical Pipeline: Earlier-Stage Programs

Our Enteric Hyperoxaluria Program

SYNB8802 is a novel, orally administered, non-systemically absorbed drug candidate that was being developed for the treatment of enteric 

hyperoxaluria, a chronic, progressive disease characterized by high levels of urinary oxalate (Uox), a well-recognized cause of recurrent kidney stones. 

Hyperoxaluria is a disease which results from excessive levels of oxalate in the body. Oxalate can be found naturally in the body or in foods with 

high oxalate levels such as leafy greens, potatoes, almonds, coffee, and beans. Humans do not have an inherent physiological need for oxalate and it is 
normally excreted through the kidney. Excessive levels of oxalate, when present in the urine, bind with calcium in the kidney and lead to nephrolithiasis 
(kidney stone formation), nephrocalcinosis, chronic kidney complications and renal disease.

Enteric hyperoxaluria often occurs as a result of a primary insult to the bowel, such as Crohn’s disease, short bowel syndrome, or surgical 

procedures such as Roux-en-Y bariatric weight-loss surgery. This results in GI malabsorption, causing increased absorption of oxalate across the GI tract 
into the circulation. Oxalate crystals can damage kidneys, leading to chronic kidney disease and end-stage renal disease (ESRD). There are no approved 
treatments for enteric hyperoxaluria. 

There is a direct link between elevated Uox and increased probability of kidney stone events or other renal adverse outcomes in patients with 

enteric hyperoxaluria. Even modest reductions in Uox can reduce the odds of developing a kidney stone. A recent epidemiological study conducted in 297 
patients with enteric hyperoxaluria demonstrated that a 20% reduction in Uox resulted in as 

10

 
 
much as a 25% reduction in the annual risk of having a kidney stone in the subsequent year in patients with recurrent kidney stones (D’Costa, Nephrol Dial 
Transplant 2020).

There are currently few approved treatments for primary hyperoxaluria, a rare genetic disease wherein the liver produces excessive levels of 

oxalate. Approved treatments for primary hyperoxaluria target the liver, and thus are not beneficial to patients with enteric hyperoxaluria, given its etiology 
is in GI malabsorption, and not hepatic over-production.

We estimate that there are 200,000 to 300,000 patients with recurrent kidney stones due to enteric hyperoxaluria in the United States. Existing 

treatment options are generally non-specific and include high fluid intake to increase urine output to more than two to three liters per day, a diet low in salt 
and oxalate, oral citrate and/or calcium and/or magnesium supplementation. We believe a clear need exists for therapies that lower dangerously high levels 
of Uox to reduce the risk of recurrent kidney stones in this patient population. 

In May 2020, we announced the nomination of a clinical candidate for enteric hyperoxaluria, SYNB8802, which was designed using precision 

genetic engineering of E. coli Nissle to lower Uox levels by consuming oxalate throughout the GI tract through the addition of three different enzymes.  In 
vivo studies in both mice and non-human primates demonstrated that SYNB8802 decreased Uox levels in an acute model of hyperoxaluria induced by 
dietary intervention. A detailed description of the engineering of SYNB8802 and data from these preclinical studies in an animal model of disease and 
healthy non-human primates was published in Molecular Systems Biology (Lubkowicz et al 2022).  In 2021, we reported positive proof-of-mechanism for 
SYNB8802 from a Phase 1b study that demonstrated lowering of urinary and fecal oxalate levels in healthy volunteers with diet-induced hyperoxaluria, 
and in December 2022, we shared data confirming that SYNB8802 demonstrated proof of concept through clinically significant -38% lowering of Uox in a 
Phase 1b study in patients with a history of gastric bypass surgery.

Our Gout Program 

SYNB2081 is designed to consume uric acid in the GI tract with the goal of lowering systemic uric acid levels as a potential treatment for gout, a 

complex form of inflammatory arthritis. Current treatment options present limitations in both safety and efficacy. SYNB2081 presents a novel, orally 
administered, non-systemically absorbed drug candidate created through our research collaboration with Ginkgo.

Gout occurs when excess uric acid in the body forms crystals in the joints. Patients can experience symptoms such as intense joint pain, 
inflammation and redness, and limited range of motion in the affected joints due to excessive levels of uric acid. In addition, gout is a recognized risk factor 
in chronic kidney disease. Due to present limitations in current treatment options, we believe that there is a clear need for a new approach.

In August 2022 we announced SYNB2081 as our drug candidate for the potential treatment of gout and the second product to advance to clinical 

development through our collaboration with Ginkgo.

Designing and Developing Synthetic Biotics  

The Synthetic Biotics we design have unique advantages as potentially safe, effective, orally administered biotherapeutics. Engineered microbes 

can be programmed to carry out functions that cannot be performed by conventional drug treatments, such as small molecules or antibodies. Unlike other 
targeted approaches such as gene or RNA-targeted therapies, Synthetic Biotics are reversible, as they are engineered to be non-colonizing and are rapidly 
cleared via excretion. They have a reduced risk of adverse events due to the lack of systemic absorption. 

Using Synthetic Biology to Generate Synthetic Biotics 

Bacteria have evolved over millions of years to adapt, survive, and actively metabolize to consume or produce metabolites in the human body. 

They are also amenable to genetic manipulation. To confer a therapeutic effect, we use basic biological properties of bacteria and the tools of synthetic 
biology to develop Synthetic Biotics from non-pathogenic microbes, focusing initially on a single strain of the bacteria E. coli Nissle.

Our scientists genetically engineer probiotic, non-pathogenic bacteria to create biological circuits to direct cellular processes in a manner 
analogous to designing electrical circuits. We aim to precisely and appropriately control the amount, location and activity of our Synthetic Biotics to 
address specific diseases and target biology of interest.

The critical parts of an engineered Synthetic Biotic medicine include (1) the chassis, or non-pathogenic bacterium (in our case E. coli Nissle), (2) 

the effector module(s), which is a gene or pathway encoding the core biological activity that provides the 

11

 
therapeutic function, and (3) tunable switches that are designed to respond to specific disease states or environment signals to precisely control the activity, 
potency, and performance of the effector modules.

1.

2.

The Chassis: Our Synthetic Biotic platform starts with a well-characterized probiotic to serve as the chassis upon which we build our living 
medicines. Our research and development programs use E. coli Nissle, which is one of many non-pathogenic probiotics isolated from the 
human microbiota. E. coli Nissle is non-colonizing and has been used as a probiotic bacterial supplement for many years to promote gut 
health. Clinical studies have demonstrated that E. coli Nissle is rapidly cleared from most individuals with no significant safety issues (Clin. 
Transl. Sci. (2017) 00, 1—8). We also observed complete clearance from subjects in our Phase 1 clinical trial of SYNB1618 in healthy 
volunteers (Puurunen et al 2021 Nature Metabolism 3; 1125-1132). We believe E. coli Nissle's widespread use as a probiotic is evidence of 
its utility as a safe background chassis to apply synthetic biology to confer a therapeutic benefit. There are several additional features of E. 
coli Nissle organism that makes it an attractive chassis for our platform:

•

•

•

•

E. coli Nissle’s genetic and metabolic machinery are well understood and provide a robust cellular context into which genetic 
information can be introduced with high efficiency and little or no damage to the fitness of the bacterium. 

The advanced nature of the synthetic biology toolkit available for E. coli Nissle enables rapid iterative design, assembly, and 
testing of prototype product candidates and remains unique among other bacterial and cellular engineering approaches.

Starting from known principles of manufacturing helps de-risk Synlogic’s proprietary large-scale manufacturing platform.

As a Gram-negative bacterium, with a protective outer wall, E. coli Nissle survives well in the human GI tract.

The Effector Module or Circuit: Synthetic Biotics have the advantage that they can be designed with multiple pathway components. We 
have engineered integration systems to direct stable insertion of multiple genetic circuits and pathways into optimal chromosomal locations, 
or “landing pads,” of E. coli Nissle. This enables efficient and stable expression of multiple genes encoding enzymes and other proteins. Our 
approach allows us to engineer two types of mechanistic activities into our Synthetic Biotics: 1) we can engineer Synthetic Biotics capable of 
metabolic transformations that can substitute or compensate for missing or defective pathways in a patient, and 2) we can engineer Synthetic 
Biotics to produce therapeutically beneficial molecules.  

The enzymatic pathways needed to produce or convert molecules are protected from the harsh GI environment by their location within the 
cell cytoplasm of E. coli Nissle, allowing them the potential to function throughout the GI tract. We have leveraged proprietary tools, know-
how and intellectual property to build multiple Synthetic Biotics that produce therapeutically relevant effects in pre-clinical experiments. 
Progression of these product candidates in diseases with high unmet need is based on prioritizing those with feasible drug development paths 
in terms of availability of informative animal models and existence of biomarkers to guide efficient clinical development.

3.

Tunable Switches: We also design and engineer proprietary switches to control the activity of the genetic pathways we introduce into our 
Synthetic Biotics, with the goal of controlling the engineered circuit or its therapeutic output. To optimize the fitness and activity of a 
Synthetic Biotic, it is critical that the effector is activated at the appropriate time and 

12

 
 
place to mediate its function. Switches are based on engineering DNA elements called “inducible promoters” that are designed to respond to 
disease states, specific environmental signals, or exogenously added inducing molecules.

Advantages of Synthetic Biotic Biotherapeutics

We believe our Synthetic Biotics will provide safe and effective therapies given the following attributes:

1.

Synthetic Biotics Have Potential to Address Unmet Needs Not Possible with Other Modalities 

Degrading Toxic Metabolites: Unlike other therapeutic approaches, Synthetic Biotics can be programmed with a unique mechanistic activity. 
For internal metabolic programs, we are engineering Synthetic Biotics with entire pathways designed to degrade or convert toxic metabolites. 
We believe that using a metabolizing pathway is advantageous compared to gene, RNA or enzyme replacement therapies because the latter 
are limited to targeting a single gene or protein defect and may require several unique drug products to address genetically heterogeneous 
patient populations. Compensating with an entire pathway delivered in bacteria Synthetic Biotics may provide a safe, therapeutic solution to 
broader disease populations as a single engineered therapeutic. Our clinical stage programs, SYNB1934, SYNB8802 and SYNB1353, are 
examples of Synthetic Biotics designed and engineered to eliminate metabolites from the GI tract and prevent their absorption.

Production of Therapeutic Molecules: Synthetic Biotics can also be programmed to produce beneficial molecules, such as bacterial 
metabolites that may improve disease or proteins that can be secreted from the bacteria into the local environment. Examples of this approach 
include production of short chain fatty acids (Reeves et al. DDW 2022), aryl hydrocarbon (AHR) agonists (Shu et al. DDW2022) and 
secretion of human IL-22 protein (Reeves et al. DDW 2022).

Combinations of Mechanisms: By incorporating multiple effectors or enzymes into a single strain, Synthetic Biotics have the potential to 
address multifactorial disease biology more effectively. For example, Synthetic Biotics can be engineered with multiple enzymes which 
convert toxic metabolites more effectively than a single effector could otherwise provide. Alternatively, pathways that degrade a metabolite 
of interest can be engineered into a Synthetic Biotic that also produces one or more therapeutic molecules.

2.

Synthetic Biotics Have Potential to Reduce Safety Risks by Providing Local Therapeutic Delivery

 We believe that when delivered locally, Synthetic Biotics have the potential to avoid the risks often associated with systemic therapies, 
especially when combinations of systemic therapies are required. Our Synthetic Biotic drug candidates are orally administered, and act 
locally while transiting through the gut. Consequently, they decrease toxic metabolite levels in the blood to provide a systemic therapeutic 
benefit to the patient. Given the potential for chronic oral dosing, Synthetic Biotics may have benefits in terms of dose prediction and 
reversibility of activity.

3.

The Synthetic Biotic Approach is a Favorable Engine for Pharmacology  

Features of our Synthetic Biotic product engine enable a highly efficient drug discovery and development with the potential of advancing 
clinical candidates more rapidly and efficiently than traditional approaches. Reasons for this include:

•

•

•

E. coli Nissle chassis is used across programs. Because our lead programs are based on E. coli Nissle, experience can be leveraged 
broadly across the portfolio to further optimize the efficiency and reproducibility of discovery, development and manufacturing 
efforts. The non-colonizing nature of E. coli Nissle can be combined with engineering approaches to enhance safety in terms of 
impact on the patient and the environment. E. coli Nissle can be engineered to require a specific exogenous nutrient supplement for 
growth, which limits the ability to replicate in the human body and environment. By controlling replication, we can control the 
number of cells being administered to a patient, which limits patient-to-patient variability. Also, dependence on an essential 
nutritional supplement not available in the environment reduces biocontainment risk. In addition, our chassis can be engineered to 
remove genes responsible for the production of the potential genotoxin colibactin, as an added safety features (Kalantari et al. Plos 
One 2023).

Predictive pharmacology and biomarkers. Synthetic Biotic programs are designed to achieve a target activity and support an 
iterative design-build-test cycle to improve performance for achieving this target. For example, Synthetic Biotic programs can be 
optimized by including multiple copies or regulated control of certain genes, by adding transporters for particular substrates or by 
optimizing enzymes for basic bacterial metabolism. These tools enable rational and iterative engineering cycles in the discovery 
phase.

Biomarkers as indicators of mechanistic and clinical activity may also be engineered into Synthetic Biotics to drive optimization 
and decision-making. By assessing the activities of our Synthetic Biotic programs using in vitro and in vivo preclinical models, we 
can model activity in humans. As we progress through clinical studies, 

13

 
 
•

•

we expect our predictive pharmacology models are further refined to inform dosing and development decisions for our additional 
programs.

Stability and manufacturing. Starting from known principles of manufacturing helps de-risk Synlogic’s proprietary large-scale 
manufacturing platform. Our lead Synthetic Biotic programs have advanced the platform by defining manufacturing processes that 
can be used for the entire portfolio. Our use of synthetic biology switches permits the precise control of engineered metabolic 
pathway activation. We use switches to suppress effector activity during manufacturing, enabling development of reproducible 
processes for biomass generation while maintaining robust and cost-efficient scale up of product candidates.

Manufacturing campaigns have demonstrated production reproducibility and robustness at multiple scales. The stability profile of 
our material has translated through the development and scale up efforts, supporting the shelf life of our strains. The implemented 
late stage and scale up capabilities have enabled us to produce 10,000 to 15,000 drug product doses at multiple strengths. 

Collaboration Agreements

To accelerate the development and commercialization of Synthetic Biotics to patients, we have formed strategic alliances with collaborators that can 

expand our pipeline of therapeutic development and product candidates.

Roche

In June 2021, we entered into a Pilot Collaboration and Option Agreement (the Roche Collaboration and Option Agreement) with F. Hoffmann-La 
Roche Ltd (Roche Basel) and Hoffmann-La Roche Inc. (Roche US, and together with Roche Basel, Roche). Under the terms of the Roche Collaboration 
and Option Agreement, we and Roche sought to collaborate to research and pre-clinically develop Synthetic Biotics for addressing an undisclosed novel 
target for the treatment of inflammatory bowel disease. 

Pursuant to the Roche Collaboration and Option Agreement, Roche agreed to pay us an upfront, nonrefundable technology access fee of $1.0 
million, which we received in July 2021. In August 2022, the Company completed the research and development services for the second phase of the 
research plan and achieved a milestone payment of $1.5 million, which was paid by Roche in October 2022. In October 2023, the Company completed the 
research and development services for the third phase of the research plan and achieved a milestone payment of $2.5 million, which was paid by Roche in 
December 2023. The Roche Collaboration and Option Agreement concluded when Roche did not exercise its exclusive option to enter into a licensing and 
collaboration agreement for further development and commercialization of the product candidate.

Ginkgo Bioworks, Inc. 

In June 2019, we entered into an agreement with Ginkgo. The agreement provided an $80 million equity investment at a premium in Synlogic by 
Ginkgo and entry into a long-term strategic platform collaboration to expand and accelerate the development of Synlogic’s pipeline of Synthetic Biotics. 
We are using Ginkgo’s cell programming platform to build and test thousands of microbial strains to accelerate progression of early preclinical leads to 
drug candidates optimized for further clinical development.

As part of the agreement, Ginkgo purchased 422,718 shares of our common stock and accompanying Pre-Funded Warrants (the Pre-Funded 
Warrants) to purchase up to 169,874 shares of our common stock, at a combined price of $135.00 per share and Pre-Funded Warrant. Gross proceeds were 
approximately $80 million. Under the agreement, we made a prepayment to Ginkgo of $30 million for its foundry services that are being provided to us 
over an initial term of five years, which can be extended. Upon the expiration of such initial term and, if applicable, such additional period, any portion of 
our prepayment that has not been used to purchase services from Ginkgo will be retained by Ginkgo. We have exclusive rights to any Synthetic Biotics that 
we develop as part of the collaboration and to intellectual property covering such products.

Intellectual Property and Technology Licenses

We strive to protect and enhance the proprietary technology, inventions, and improvements that are commercially important to our business, 

including seeking, maintaining, and defending patent rights, whether developed internally or licensed from our collaborators or other third parties. Our 
policy is to seek to protect our proprietary position by, among other methods, filing patent applications in the United States and in certain jurisdictions 
outside of the United States related to our proprietary technology, inventions, improvements, and product candidates that are important to the development 
and implementation of our business.

We also rely on trade secrets and know-how relating to our proprietary technology and product candidates, continuing innovation, and in-licensing 

opportunities to develop, strengthen, and maintain our proprietary position in the field of synthetic 

14

 
 
 
 
 
 
 
 
 
biology. We additionally rely on data exclusivity, market exclusivity, and patent term extensions when available, and  plan to rely on additional regulatory 
protection afforded through orphan drug designations when applicable. Our commercial success may depend in part on our ability to obtain and maintain 
patent and other proprietary protection for our technology, inventions, and improvements; to preserve the confidentiality of our trade secrets; to maintain 
our licenses to use intellectual property owned by third parties; to defend and enforce our proprietary rights, including our patents; and to operate without 
infringing on the valid and enforceable patents and other proprietary rights of third parties.

We believe we are well positioned in terms of intellectual property because we:

•

•

Have built and expanded, and intend to continue expansion in, a broad worldwide portfolio of intellectual property, including patents and 
patent applications, in areas relevant to the development, manufacturing and formulation of human therapeutic products using live 
biotherapeutics based on synthetic biology; and

Intend to take additional steps, where appropriate, to further protect our intellectual property rights, including, for example, through the use 
of copyright and trademark protection, as well as regulatory protection available via orphan drug designations, data exclusivity, market 
exclusivity and patent term extensions.

We believe our intellectual property portfolio provides broad coverage of our Synthetic Biotic platform and applicable disease-related technologies. 

As of March 12, 2024, we had over 200 Synlogic-owned patents and patent applications in U.S. and foreign jurisdictions, of which over 75 have been 
issued or allowed.

Synlogic Intellectual Property

Disease-related applications

The disease-related applications in our intellectual property portfolio relate to certain pathological conditions including, but not limited to , 

hyperphenylalaninemia, hyperoxaluria, homocystinuria, hyperuricemia, hyperammonemia, certain other inherited metabolic diseases and conditions, 
metabolic disorders, diseases and conditions associated with an inflammatory state, diseases associated with gut inflammation, compromised gut mucosal 
barrier (leaky gut), and various autoimmune disorders and provide coverage for engineered bacteria having genetic circuitry designed to specifically 
address those conditions and the associated disease states. The intellectual property portfolio provides coverage for engineered bacterial strain 
compositions, related formulations, methods of making the bacterial strains, methods of measuring strain activity, and methods for treating diseases. 
Currently, intellectual property relating to this technology includes pending applications in U.S. and foreign jurisdictions, as well as several issued U.S. 
patents directed to composition of matter and pharmaceutical composition claims covering our clinical candidates. The patent term for our current patents 
and patent applications have expiration dates ranging from December 2035 to December 2044, depending on the indication and excluding any patent term 
adjustments or extensions.

Platform Technology Applications

In addition to disease-specific technology, Synlogic has also developed a number of technologies broadly applicable across the Synlogic platform. 

We rely on a combination of patent application and trade secrets to protect our platform intellectual property.  Exemplary platform technologies include our 
unique upstream and downstream GMP manufacturing processes, bacterial chassis-related and genetic circuitry-related technological developments, 
including, for example, improvements in inducible gene regulation, control of bacterial cell growth, and systems for importing metabolites, as well as 
systems for prevention of production of potentially genotoxic metabolites. These platform technologies, and our intellectual property coverage thereof, are 
broadly applicable to our therapeutic Synthetic Biotics.

General Considerations

Individual patents extend for varying periods of time, depending upon the date of filing of the patent application, the date of patent issuance, and the 

legal term of patents in the countries in which they are obtained. Generally, patents issued for applications filed in the United States are effective for 20 
years from the earliest effective non-provisional filing date. In addition, in certain instances, a patent term can be extended to account for delays in 
prosecution at the U.S. Patent and Trademark Office (USPTO) and/or to recapture a portion of the term effectively lost as a result of the FDA regulatory 
review period. For regulatory delays, the restoration period cannot be longer than five years and the total patent term, including the restoration period, must 
not exceed 14 years following FDA approval. The duration of patents outside of the United States varies in accordance with provisions of applicable local 
law, but typically is also 20 years from the earliest effective non-provisional filing date. However, the actual protection afforded by a patent varies on a 
product-by-product basis, from country-to-country, and depends upon many factors, including the type of patent, the scope of its coverage, the availability 
of regulatory-related extensions, the availability of legal remedies in a particular country, and the validity and enforceability of the patent.

15

 
 
 
 
 
 
 
 
 
The patent positions of companies like us are generally uncertain and involve complex legal and factual questions. No consistent policy regarding 

the scope of claims allowable in patents in the field of synthetic biology has emerged in the United States. The patent situation outside of the United States 
is even more uncertain. With respect to both licensed and company-owned intellectual property, we cannot be sure that patents will be granted with respect 
to any of our pending patent applications or with respect to any patent applications filed by us in the future, nor can we be sure that any of our existing 
patents or any patents that may be granted to us the future will be commercially useful in protecting our products and the methods used to manufacture 
those products. For additional risks, please see the section entitled “Risk Factors—Risks Related to Intellectual Property.”

Trademarks

Our registered trademark portfolio currently contains over 40 registered or allowed trademarks.

Other

Generally, we seek to protect our technology and product candidates, in part, by entering into confidentiality agreements with those who have access 

to our confidential information, including employees, contractors, consultants, collaborators, and advisors. In some circumstances, we may rely on trade 
secrets to protect our technology. We seek to preserve the integrity and confidentiality of our proprietary technology, trade secrets and processes by 
maintaining physical security of our premises and physical and electronic security of our information technology systems. Although we have confidence in 
these individuals, organizations, and systems, agreements or security measures may be breached and we may not have adequate remedies for any breach. In 
addition, our trade secrets may otherwise become known or may be independently discovered by competitors. To the extent that company employees, 
contractors, consultants, collaborators, and advisors use intellectual property owned by others in their work for us, disputes may arise as to the rights in 
related or resulting know-how and inventions. For this and more comprehensive risks related to our proprietary technology, inventions, improvements and 
products, please see the section entitled “Risk Factors—Risks Related to Intellectual Property.”

Regulatory Matters

Government Regulation and Product Approval

Government authorities in the United States, at the federal, state and local level, and other countries extensively regulate, among other things, the 
research, development, testing, manufacture, quality control, approval, labeling, packaging, storage, record keeping, promotion, advertising, distribution, 
marketing and export and import of products such as those we are developing. A new drug must be approved by the FDA through the New Drug 
Application (NDA) process and a new biologic must be approved by the FDA through the Biologics License Application (BLA), process before such 
products may be legally marketed in the United States.

U.S. Drug Development Process

In the United States, the FDA regulates drugs and biologics under the Federal Food, Drug, and Cosmetic Act (FDCA) and in the case of biologics, 

also under the Public Health Service Act (PHSA) and implementing regulations. Our product candidates will be regulated by the FDA as biologics. The 
process of obtaining regulatory approvals and the subsequent compliance with applicable federal, state, local, and foreign statutes and regulations require 
the expenditure of substantial time and financial resources. Failure to comply with the applicable U.S. requirements at any time during the product 
development process, approval process or after approval, may subject an applicant to administrative or judicial sanctions. These sanctions could include the 
FDA’s refusal to approve pending applications, withdrawal of an approval, license revocation, a clinical hold, warning letters, product recalls, product 
seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement, or civil or 
criminal penalties. Any agency or judicial enforcement action could have a material adverse effect on us. The process required by the FDA before a 
biologic may be marketed in the United States generally involves the following:

•

•

•

Completion of required preclinical (or nonclinical) laboratory tests, animal studies and formulation studies performed in accordance with Good 
Laboratory Practice (GLP) and other applicable regulations;

Submission to the FDA of an investigational new drug application (IND) which must become effective before shipment of investigational 
product for human clinical trials may begin;

Approval by an independent institutional review board (IRB) or ethics committee at each clinical trial site before each clinical trial may be 
initiated;

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•

•

•

•

•

•

•

Performance of adequate and well-controlled human clinical trials performed in accordance with applicable IND regulations, Good Clinical 
Practice (GCP), and other clinical-trial related regulations to evaluate the safety and efficacy of the investigational product for each proposed 
indication; 

Good Manufacturing Practice (GMP) to prepare a drug substance and drug product analyzed using validated analytical methods;

Development and approval of a companion diagnostic device, if the FDA or the sponsor believes that its use is essential for the safe and 
effective use of a corresponding product;

Submission to the FDA of a BLA for marketing approval, including payment of application user fees;

Satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the biologic is produced to assess compliance 
with current Good Manufacturing Practice (cGMP) regulations to assure that the facilities, methods and controls are adequate to preserve the 
product’s identity, strength, quality and purity;

Potential FDA audit of the clinical trial sites to assure compliance with GCP and the integrity of the clinical data submitted in support of the 
BLA; and

FDA review and approval of the BLA, including satisfactory completion of an FDA advisory committee review of the product candidate, 
where appropriate or if applicable, prior to any commercial marketing or sale of the product in the United States.

Once a pharmaceutical candidate is identified for development, it enters the preclinical testing stage. Preclinical tests include laboratory evaluations 
of product chemistry and formulation, animal toxicity and pharmacology studies to assess the potential for adverse events and in some cases to establish a 
rationale for therapeutic use. The Consolidated Appropriations Act for 2023, signed into law on December 29, 2022, (P.L. 117-328) amended the FDCA 
and the Public Health Service Act to specify that nonclinical testing for drugs and biologics may, but is not required to, include in vivo animal testing. 
According to the amended language, a sponsor may fulfill nonclinical testing requirements by completing various in vitro assays (e.g., cell-based assays, 
organ chips, or microphysiological systems), in silico studies (i.e., computer modeling), other human or nonhuman biology-based tests (e.g., bioprinting), 
or in vivo animal tests. The conduct of preclinical studies is subject to federal regulations and requirements, including GLP regulations for 
safety/toxicology studies.

An IND sponsor must submit the results of the preclinical tests, together with manufacturing information and analytical data, to the FDA as part of 
the IND. In June 2016, the FDA issued an updated guidance for the industry entitled “Early Clinical Trials with Live Biotherapeutic Products: Chemistry, 
Manufacturing and Control Information,” which included recommendations from the FDA regarding the chemistry, manufacturing and control information 
that should be included in an IND for early clinical trials with live biotherapeutic products. This guidance reflects the FDA’s thinking on the topic at the 
time the guidance was issued and although it is not binding on the FDA or a sponsor, it provided us with additional information about what should be 
included in INDs for our Synthetic Biotic product candidates. The sponsor will also include in the IND a protocol detailing, among other things, the 
objectives of the clinical trial, the parameters to be used in monitoring safety, and the effectiveness criteria to be evaluated, if a first phase study lends itself 
to an efficacy evaluation. Some long-term preclinical testing, such as animal tests of reproductive adverse events and carcinogenicity, may continue after an 
IND for an investigational product candidate is submitted to the FDA and human clinical trials have been initiated. The IND automatically becomes 
effective 30 days after receipt by the FDA, unless the FDA, within the 30-day time period, places the clinical trial on a clinical hold. In such a case, the 
IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. Clinical holds also may be imposed by the FDA at any 
time before or during clinical trials due to safety concerns about ongoing or proposed clinical trials or non-compliance with specific FDA requirements, and 
the trials may not begin or continue until the FDA notifies the sponsor that the hold has been lifted.

All clinical trials must be conducted under the supervision of one or more qualified investigators, and in accordance with GCP requirements. They 

must be conducted under protocols detailing the objectives of the trial, dosing procedures, subject selection and exclusion criteria and the safety and 
effectiveness criteria to be evaluated. Each protocol must be submitted to the FDA as part of the IND, and timely safety reports must be submitted to the 
FDA and the investigators for serious and unexpected adverse events. An IRB at each institution participating in the clinical trial must review and approve 
each protocol before a clinical trial commences at that institution and must also approve the information regarding the trial and the consent form that must 
be provided to each trial subject or his or her legal representative, monitor the study until completed and otherwise comply with IRB rules and regulations. 
Study subjects must sign the IRB-approved informed consent form in order to participate in the clinical trial.

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In addition, an IRB representing each institution that is participating in the clinical trial must review and approve the plan for any clinical trial before 
it commences at that institution, and the IRB must conduct a continuing review and reapprove the trial at least annually. The IRB must review and approve, 
among other things, the trial protocol and informed consent information to be provided to clinical trial subjects. An IRB must operate in compliance with 
FDA regulations.

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

•

•

•

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

Phase 2: This phase involves clinical trials in a limited patient population to identify possible adverse effects and safety risks, to 
preliminarily evaluate the efficacy of the product candidate for specific targeted diseases and to determine dosage tolerance and optimal 
dosage.

Phase 3: Larger clinical trials are undertaken to further evaluate dosage, clinical efficacy and safety in an expanded patient population, 
often at geographically dispersed clinical study sites. These clinical trials are intended to establish the overall risk: benefit ratio of the 
product candidate and provide, if appropriate, an adequate basis for product labeling. These trials may include comparisons with 
placebo and/or other comparator treatments. The duration of treatment is often extended to mimic the actual use of a product during 
marketing.

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

In the Consolidated Appropriations Act for 2023, Congress amended the FDCA to require sponsors of a Phase 3 clinical trial, or other “pivotal 
study” of a new drug to support marketing authorization, to submit a diversity action plan for such clinical trial. The action plan must include the sponsor’s 
diversity goals for enrollment, as well as a rationale for the goals and a description of how the sponsor will meet them. A sponsor must submit a diversity 
action plan to FDA by the time the sponsor submits the trial protocol to the agency for review. The FDA may grant a waiver for some or all of the 
requirements for a diversity action plan. It is unknown at this time how the diversity action plan may affect Phase 3 trial planning and timing or what 
specific information FDA will expect in such plans, but if FDA objects to a sponsor’s diversity action plan and requires the sponsor to amend the plan or 
take other actions, it may delay trial initiation.

The FDA or the sponsor may suspend or terminate 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 clinical protocol, cGMP or IRB requirements or if the product candidate has been associated 
with unexpected serious harm to patients. Additionally, some clinical trials are overseen by an independent group of qualified experts organized by the 
sponsor, known as a data safety monitoring board or committee. Depending on its charter, this group may determine whether a trial may move forward at 
designated check points based on access to certain data from the trial. Phase 1, Phase 2, and Phase 3 clinical testing may not be completed successfully 
within any specified period, if at all.

During the development of a new biologic, sponsors have the opportunity to meet with the FDA at certain points. These points may be prior to 

submission of an IND, at the end of Phase 2, and before a BLA is submitted. Meetings at other times may be requested. These meetings can provide an 
opportunity for the sponsor to share information about the data gathered to date, for the FDA to provide advice, and for the sponsor and the FDA to reach 
agreement on the next phase of development. Sponsors typically use the end of Phase 2 meeting to discuss their Phase 2 clinical results with the FDA and 
to present their plans for the pivotal Phase 3 clinical trial that they believe will support approval of the investigational biologic. If this type of discussion 
occurs, a sponsor may be able to request a Special Protocol Assessment (SPA), the purpose of which is to reach agreement with the FDA on the design of 
the Phase 3 clinical trial protocol design and analysis that will form the primary basis of an efficacy claim.

Concurrent with clinical trials, companies usually complete the additional animal studies that may be required for approval and must also develop 
additional information about the chemistry and physical characteristics of the biologic and finalize a process for manufacturing the product in commercial 
quantities in accordance with cGMP requirements. The manufacturing process must be capable of consistently producing acceptable quality batches of the 
product candidate and, among other things the manufacturer must develop methods for testing the identity, strength, quality and purity of the final product. 
Additionally, appropriate packaging must be 

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selected and tested and stability studies must be conducted to demonstrate that the product candidate does not undergo unacceptable deterioration over its 
shelf life.

While the IND is active and before approval, progress reports must be submitted at least annually to the FDA, and written IND safety reports must 

be submitted to the FDA and investigators for serious and unexpected suspected adverse reactions, findings from other studies suggesting a significant risk 
to humans exposed to the same or similar drugs, findings from animal or in vitro testing suggesting a significant risk to humans, and any clinically 
important increased incidence of a serious suspected adverse reaction compared to that listed in the protocol or investigator brochure. The annual report is 
customarily submitted in the form of a Development Safety Update Report (DSUR) which is accepted as being equivalent to an IND Annual Report and 
also meets requirements of the EU (European Union) and International Conference on Harmonization (ICH).

There are also requirements governing the reporting of ongoing clinical trials and completed trial results to public registries. Sponsors of most 

clinical trials of FDA-regulated products are required to register and disclose specified clinical trial information, which is publicly available at 
ClinicalTrials.gov. Information related to the product, patient population, phase of investigation, trial sites and investigators and other aspects of the clinical 
trial is then made public as part of the registration. Sponsors are also obligated to submit the results of their clinical trials after completion, but disclosure of 
the results can be delayed in some cases for up to two years after the date of completion of the trial. Competitors may use this publicly available 
information to gain knowledge regarding the progress of development programs. Failure to timely register a covered clinical study or to submit study 
results as provided for in the law can give rise to civil monetary penalties and also prevent the non-compliant party from receiving future grant funds from 
the federal government. The NIH’s Final Rule on ClinicalTrials.gov registration and reporting requirements became effective in 2017, and both NIH and 
FDA recently began enforcing those requirements against non-compliant clinical trial sponsors.

U.S. Review and Approval Processes

Assuming successful completion of the required clinical testing, the results of the nonclinical studies and clinical trials, along with detailed 
information relating to the product’s chemistry, manufacturing, and controls, stability, quality control and product release procedures, proposed labeling, 
and other relevant information are submitted to the FDA as part of a BLA, requesting approval to market the product for one or more indications. The 
submission of a BLA is subject to the payment of a significant user fee (for example, for FY2024 this application fee exceeds $4 million); although a 
waiver of such fee may be obtained under certain limited circumstances, including where the biologic has been designated as an orphan drug. The sponsor 
of an approved BLA is also subject to an annual program fee, currently more than $415,000 per program. These fees are typically increased annually, but 
exemptions and waivers may be available under certain circumstances (such as a waiver for the first human drug application submitted by a qualifying 
small business and exemptions for orphan products).

The FDA reviews all BLAs submitted to ensure that they are sufficiently complete for substantive review before it accepts them for filing. The FDA 

may request additional information rather than accept a BLA for filing. In this event, the BLA must be resubmitted with the additional information. The 
resubmitted application also is subject to review before the FDA accepts it for filing. Once the submission is accepted for filing, the FDA begins an in-
depth substantive review. Under the goals and policies agreed to by the FDA under the Prescription Drug User Fee Act, or PDUFA, for original BLAs, the 
FDA has ten months from the filing date in which to complete its initial review of a standard application and respond to the applicant, and six months from 
the filing date for an application with priority review. The FDA does not always meet its PDUFA goal dates, and the review process is often significantly 
extended by FDA requests for additional information or clarification and a sponsor’s process to respond to such inquiries. Specifically, the review process 
may be extended by the FDA for three additional months to consider new information or in the case of a clarification provided by the applicant to address 
an outstanding deficiency identified by the FDA following the original submission.

Before approving a BLA, the FDA will typically conduct a pre-approval inspection of the manufacturing facilities for the new product to determine 
whether the manufacturing processes and facilities comply with cGMPs. The FDA will not approve the product unless it determines that the manufacturing 
processes and facilities are in compliance with cGMP requirements and adequate to assure consistent production of the product within required 
specifications. These pre-approval inspections may cover all facilities associated with the BLA submission, including component manufacturing, finished 
product manufacturing, and control testing laboratories. The FDA also may inspect the sponsor and one or more clinical trial sites to assure compliance 
with GCP requirements and the integrity of the clinical data submitted to the FDA. If the FDA determines the application, manufacturing process or 
manufacturing facilities are not acceptable, it typically will outline the deficiencies and often will request additional testing or information. This may 
significantly delay further review of the application. If the FDA finds that a clinical site did not conduct the clinical trial in accordance with GCP, the FDA 
may, for example, determine the data generated by the clinical site should be excluded from the primary efficacy analyses provided in the BLA.

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The FDA may refer any BLA including applications for novel biologic candidates which present difficult questions of safety or efficacy, to an 
advisory committee for review, evaluation and recommendation as to whether the application should be approved and under what conditions. Typically, an 
advisory committee is a panel of independent experts, including clinicians and other scientific experts, that reviews, evaluates and provides a 
recommendation as to whether the application should be approved and, if so, under what conditions. The FDA is not bound by the recommendation of an 
advisory committee, but it considers such recommendations when making final decisions on approval. 

The approval process is lengthy and often difficult, and the FDA may refuse to approve a BLA if the applicable regulatory criteria are not satisfied 
or may require additional clinical or other data and information. Even if such data and information are submitted, the FDA may ultimately decide that the 
BLA does not satisfy the criteria for approval. Data obtained from clinical trials are not always conclusive and the FDA may interpret data differently than 
we interpret the same data. After the FDA evaluates a BLA, it will issue an approval letter or a Complete Response Letter (CRL). An approval letter 
authorizes commercial marketing of the drug with prescribing information for specific indications. 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 usually describes the specific deficiencies in the BLA identified by the 
FDA and may require additional clinical data, such as an additional pivotal Phase 3 trial or other significant and time-consuming requirements related to 
clinical trials, nonclinical studies or manufacturing. If a CRL is issued, the sponsor must resubmit the BLA, addressing all of the deficiencies identified in 
the letter, or withdraw the application. Even if such data and information are submitted, the FDA may decide that the BLA does not satisfy the criteria for 
approval. The FDA reviews a BLA to determine, among other things, whether the product is safe, pure, potent and effective and the facility in which it is 
manufactured, processed, packed or held meets standards designed to assure the product’s continued identity, strength, quality, potency and purity.

If a product receives regulatory approval, the approval is limited to the conditions of use (e.g., patient population, indication) described in the BLA, 

which could restrict the commercial value of the product. Further, depending on the specific risk(s) to be addressed, the FDA may require that 
contraindications, warnings or precautions be included in the product labeling, require a sponsor to conduct Phase 4 testing which involves clinical trials 
designed to further assess a drug’s safety and effectiveness after BLA approval and may require testing and surveillance programs to monitor the safety of 
approved products which have been commercialized. The FDA may also place other conditions on approval including the requirement for a REMS (Risk 
Evaluation and Mitigation Strategies), to assure the safe use of the drug. If the FDA concludes a REMS is needed, the sponsor of the BLA must submit a 
proposed REMS. The FDA will not approve the BLA without an approved REMS, if required. A REMS could include medication guides, physician 
communication plans or elements to assure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. Any of 
these limitations on approval or marketing could restrict the commercial promotion, distribution, prescription or dispensing of products. Marketing 
approval may be withdrawn for non-compliance with regulatory requirements or if problems occur following initial marketing.

Under the Pediatric Research Equity Act (PREA), as amended, an initial BLA or certain supplements to a BLA for a novel product must contain 

data to assess the safety and effectiveness of the product candidate 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, on its own initiative or at the request of the 
applicant, grant deferrals for submission of pediatric data until after approval of the product for use in adults or full or partial waivers from the pediatric 
data requirement. Unless otherwise required by regulation, PREA does not typically apply to any therapeutic product for an indication for which orphan 
designation has been granted. The Food and Drug Administration Safety and Innovation Act (FDASIA), enacted in 2012, made permanent the PREA 
requirement that a sponsor who is planning to submit a marketing application for a product that includes a new active ingredient, new indication, new 
dosage form, new dosing regimen or new route of administration must submit an initial Pediatric Study Plan (PSP), within sixty days of an end-of-Phase 2 
meeting or, if there is no such meeting, as early as practicable before the initiation of the Phase 3 or Phase 2/3 clinical trial. The initial PSP must include an 
outline of the pediatric study or studies that the sponsor plans to conduct, including trial objectives and design, age groups, relevant endpoints and 
statistical approach, or a justification for not including such detailed information, and any request for a deferral of pediatric assessments or a full or partial 
waiver of the requirement to provide data from pediatric studies along with supporting information. The FDA and the sponsor must reach an agreement on 
the PSP. A sponsor can submit amendments to an agreed upon initial PSP at any time if changes to the pediatric plan need to be considered based on data 
collected from pre-clinical studies, early phase clinical trials or other clinical development programs.

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Patent Term Restoration and Marketing Exclusivity

Depending upon the timing, duration and specifics of FDA approval of our drugs, some of our U.S. patents may be eligible for limited patent term 

extension under the Drug Price Competition and Patent Term Restoration Act of 1984 (referred to as the Hatch Waxman Amendments). The Hatch 
Waxman Amendments permit a patent restoration term of up to five years as compensation for patent term lost during product development and the FDA 
regulatory review process. However, patent term restoration cannot extend the remaining term of a patent beyond a total of 14 years from the product’s 
approval date. The patent term restoration period is generally one half the time between the effective date of an IND, and the submission date of a BLA, 
plus the time between the submission date of a BLA and the approval of that application. Only one patent applicable to an approved drug is eligible for the 
extension, and the extension must be applied for, prior to expiration of the patent. The USPTO, in consultation with the FDA, reviews and approves the 
application for any patent term extension or restoration. In the future, we intend to apply for restorations of patent term for some of its currently-owned or 
licensed patents to add patent life beyond their current expiration date, depending on the expected length of clinical trials and other factors involved in the 
filing of the relevant BLA.

Pediatric exclusivity is a type of non-patent marketing exclusivity available in the United States, and, if granted, it provides for the attachment of an 
additional six months of marketing protection to the term of any existing regulatory exclusivity or listed patents. This six-month exclusivity may be granted 
if an NDA/BLA sponsor submits clinical pediatric data that fairly respond to a written request from the FDA for such data. The data do not need to show 
the product to be effective in the pediatric population studied; rather, if the clinical trial is deemed to fairly respond to the FDA’s request, the additional 
protection is granted. If reports of requested pediatric studies are submitted to and accepted by the FDA within the statutory time limits, whatever statutory 
or regulatory periods of exclusivity or patent protection cover the product are extended by six months. This is not a patent term extension, but it effectively 
extends the regulatory period during which the FDA cannot approve another application for the same drug/biologic. The issuance of a written request does 
not require the sponsor to undertake the described clinical trials. To date, we have not received or requested any FDA written requests.

Biologics Price Competition and Innovation Act of 2009

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

(collectively, ACA), which included the Biologics Price Competition and Innovation Act (BPCIA), amended the PHSA to create an abbreviated approval 
pathway for biological products that are biosimilar to or interchangeable with an FDA-licensed reference biological product. A biosimilar product is 
defined as one that is highly similar to a reference product notwithstanding minor differences in clinically-inactive components and for which there are no 
clinically meaningful differences between the biological product and the reference product in terms of the safety, purity and potency of the product. An 
interchangeable product is a biosimilar product that can be expected to produce the same clinical results as the reference product in any given patient and, 
for products administered multiple times to an individual, that the product and the reference product may be alternated or switched after one has been 
previously administered without increasing safety risks or risks of diminished efficacy relative to exclusive use of the reference biological product without 
such alternation or switch. Upon licensure by the FDA, an interchangeable biosimilar may be substituted for the reference product without the intervention 
of the health care provider who prescribed the reference product.

Under the BPCIA, a manufacturer may submit an abbreviated application for licensure of a biologic that is biosimilar to or interchangeable with an 
FDA-licensed reference biological product. This abbreviated approval pathway is intended to permit a biosimilar to come to market more quickly and less 
expensively than if a “full” BLA were submitted, by relying to some extent on the FDA’s previous review and approval of the reference biologic to which 
the proposed product is similar.

Under the abbreviated approval pathway, the biosimilar applicant must demonstrate that the product is biosimilar based on data from (1) analytical 
studies showing that the biosimilar product is highly similar to the reference product; (2) animal studies (including toxicity); and (3) one or more clinical 
trials to demonstrate safety, purity and potency in one or more appropriate conditions of use for which the reference product is approved. In addition, the 
applicant must show that the biosimilar and reference products have the same mechanism of action for the conditions of use on the label, route of 
administration, dosage and strength, and the production facility must meet standards designed to assure product safety, purity and potency.

A reference biological product is granted 12 years of data exclusivity from the time of first licensure of the product, and the first approved 

interchangeable biologic product will be granted an exclusivity period of up to one year after it is first commercially marketed. If pediatric studies are 
performed and accepted by the FDA as responsive to a Written Request, the 12-year exclusivity period will be extended for an additional six months. 

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In addition, the FDA will not accept an application for a biosimilar or interchangeable product based on the reference biological product until four 

years after the date of first licensure of the reference product. “First licensure” typically means the initial date the particular product at issue was licensed in 
the United States. Date of first licensure does not include the date of licensure of (and a new period of exclusivity is not available for) a supplement for the 
reference product for a subsequent application filed by the same sponsor or manufacturer of the reference product (or licensor, predecessor in interest or 
other related entity) for a change (not including a modification to the structure of the biological product) that results in a new indication, route of 
administration, dosing schedule, dosage form, delivery system, delivery device or strength or for a modification to the structure of the biological product 
that does not result in a change in safety, purity or potency. Therefore, one must determine whether a new product includes a modification to the structure 
of a previously licensed product that results in a change in safety, purity or potency to assess whether the licensure of the new product is a first licensure 
that triggers its own period of exclusivity. Whether a subsequent application, if approved, warrants exclusivity as the “first licensure” of a biological 
product is determined on a case-by-case basis with data submitted by the sponsor.

The BPCIA is complex and is still being interpreted and implemented by the FDA. In addition, recent government proposals have sought to reduce 

the 12-year reference product exclusivity period. Other aspects of the BPCIA, some of which may impact the BPCIA exclusivity provisions, have also been 
the subject of recent litigation. As a result, the ultimate impact, implementation and meaning of the BPCIA is subject to significant uncertainty.

To date, the FDA has approved a number of biosimilars, and numerous biosimilars have been approved in Europe. The FDA has also issued several 

guidance documents outlining its approach to reviewing and approving biosimilars and interchangeable biosimilars.

Orphan Drug Designation

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

defined as a disease or condition that affects fewer than 200,000 individuals in the United States, or more than 200,000 individuals in the United States and 
for which there is no reasonable expectation that the cost of developing and making available in the United States a drug for this type of disease or 
condition will be recovered from sales in the United States for that drug. Orphan drug designation must be requested before submitting a BLA. After the 
FDA grants orphan drug designation, the identity of the therapeutic agent and its potential orphan use will be disclosed publicly by the FDA; the posting 
will also indicate whether a drug is no longer designated as an orphan drug. More than one product candidate may receive an orphan drug designation for 
the same indication. The benefits of orphan drug designation include research and development tax credits and exemption from FDA prescription drug user 
fees. Orphan drug designation, however, does not convey any advantage in or shorten the duration of the regulatory review and approval process.

Generally, if a product that receives orphan designation receives the first FDA approval for the orphan indication, the product is entitled to orphan 

drug exclusivity, which means that for seven years, the FDA is prohibited from approving any other applications to market the same drug or biological 
product for the same indication, except in limited circumstances described further below. Orphan exclusivity does not block the approval of a different drug 
or biologic for the same rare disease or condition, nor does it block the approval of the same drug or biologic for different conditions. As a result, even if 
one of our product candidates receive orphan exclusivity, the FDA can still approve different drugs or biologics for use in treating the same indication or 
disease, which could create a more competitive market for us. Additionally, if a drug or biologic designated as an orphan product receives marketing 
approval for an indication broader than what was designated, it may not be entitled to orphan drug exclusivity. 

Orphan exclusivity will not bar approval of another product with the same drug or biologic for the same condition under certain circumstances, 

including if a subsequent product with the same drug or biologic for the same condition is shown to be clinically superior to the approved product on the 
basis of greater efficacy or safety or a major contribution to patient care, or if the company with orphan drug exclusivity cannot assure the availability of 
sufficient quantities of the drug or biologic to meet the needs of persons with the disease or condition for which the drug or biologic was designated. Thus, 
orphan drug exclusivity could also block the approval of one of our products for seven years if a competitor obtains approval of the same drug, as defined 
by the FDA, and we are not able to show the clinical superiority of our drug or if our product candidate is determined to be contained within the 
competitor’s product for the same indication or disease.

Recent court cases have challenged FDA’s approach to determining the scope of orphan drug exclusivity; however, at this time the agency continues 

to apply its long-standing interpretation of the governing regulations and has stated that it does not plan to change any orphan drug implementing 
regulations.

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In May 2023, the FDA granted labafenogene marselecobac Orphan Drug Designation. Additionally, in October 2017, the FDA granted SYNB1618 

Orphan Drug designation for the treatment of PKU and in November 2022, the FDA granted SYNB1353 Orphan Drug designation for the treatment of 
HCU.

Fast Track, Breakthrough Therapy, Rare Pediatric Disease and Priority Review Designations

The FDA is authorized to designate certain products for expedited development or review if they are intended to address an unmet medical need in 

the treatment of a serious or life-threatening disease or condition. These programs include Fast Track designation, breakthrough therapy designation and 
priority review designation.

To be eligible for a Fast Track designation, the FDA must determine, from the request of a sponsor, based on preclinical studies, that a product is 

intended to treat a serious or life-threatening disease or condition and demonstrates the potential to address an unmet medical need by providing a therapy 
where none exists or a therapy that may be potentially superior to existing therapy based on efficacy or safety factors. Fast Track designation provides 
opportunities for more frequent interactions with the FDA review team to expedite development and review of the product. The FDA may also review 
sections of the NDA or BLA for a Fast Track product on a rolling basis before the complete application is submitted, if the sponsor and the FDA agree on a 
schedule for the submission of the application sections, and the sponsor pays any required user fees upon submission of the first section of the NDA or 
BLA. In addition, Fast Track designation may be withdrawn by the sponsor or rescinded by the FDA if the designation is no longer supported by data 
emerging in the clinical trial process.

In addition, with the enactment of FDASIA in 2012, Congress created a new regulatory program for product candidates designated by FDA as 

“breakthrough therapies” upon a request made by the IND sponsors. A breakthrough therapy is defined as a drug or biologic that is intended, alone or in 
combination with one or more other drugs or biologics, to treat a serious or life-threatening disease or condition, and preliminary clinical evidence indicates 
that the drug or biologic may demonstrate substantial improvement over existing therapies on one or more clinically significant endpoints, such as 
substantial treatment effects observed early in clinical development. Drugs or biologics designated as breakthrough therapies are also eligible for 
accelerated approval of their respective marketing applications. The FDA must take certain actions with respect to breakthrough therapies, such as holding 
timely meetings with and providing advice to the product sponsor, intended to expedite the development and review of an application for approval of a 
breakthrough therapy.

Finally, the FDA may designate a product for priority review if it is a drug or biologic that treats a serious condition and, if approved, would provide 
a significant improvement in safety or effectiveness. The FDA determines at the time that the marketing application is submitted, on a case- by-case basis, 
whether the proposed drug represents a significant improvement in treatment, prevention or diagnosis of disease when compared with other available 
therapies. Significant improvement may be illustrated by evidence of increased effectiveness in the treatment of a condition, elimination or substantial 
reduction of a treatment-limiting drug reaction, documented enhancement of patient compliance that may lead to improvement in serious outcomes, or 
evidence of safety and effectiveness in a new subpopulation. A priority review designation is intended to direct overall attention and resources to the 
evaluation of such applications, and to shorten the FDA’s goal for taking action on a marketing application from ten months to six months for an original 
BLA or for an NDA for a new molecular entity from the date of filing.

Finally, the FDA may designate a product for priority review if it is a drug or biologic that treats a serious condition and, if approved, would provide 
a significant improvement in safety or effectiveness. The FDA determines at the time that the marketing application is submitted, on a case- by-case basis, 
whether the proposed drug represents a significant improvement in treatment, prevention or diagnosis of disease when compared with other available 
therapies. Significant improvement may be illustrated by evidence of increased effectiveness in the treatment of a condition, elimination or substantial 
reduction of a treatment-limiting drug reaction, documented enhancement of patient compliance that may lead to improvement in serious outcomes, or 
evidence of safety and effectiveness in a new subpopulation. A priority review designation is intended to direct overall attention and resources to the 
evaluation of such applications, and to shorten the FDA’s goal for taking action on a marketing application from ten months to six months for an original 
BLA or for an NDA for a new molecular entity from the date of filing.

The FDA grants Rare Pediatric Disease Designation (RPDD) for serious and life-threatening diseases that primarily affect individuals from birth to 

18 years old and fewer than 200,000 persons in the U.S.  Under this program, a sponsor who receives an approval for a drug or biologic for a “rare pediatric 
disease” designation may qualify for a pediatric priority review voucher (pPRV) that can be redeemed to receive a priority review of a subsequent 
marketing application for a different product. The Rare Pediatric Disease Priority Review Voucher program was reauthorized in the Creating Hope 
Reauthorization Act in December 2020, allowing a product that is designated as a product for a rare pediatric disease prior to October 1, 2024 to be eligible 
to receive a Priority Review Voucher upon approval of a qualifying NDA or BLA prior to October 1, 2026.

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Even if a product qualifies for one or more of these programs, the FDA may later decide that the product no longer meets the conditions for 
qualification or decide that the time period for FDA review or approval will not be shortened. Furthermore, Fast Track designation, breakthrough therapy 
designation and priority review do not change the standards for approval and may not ultimately expedite the development or approval process.

In July 2023, the FDA granted Fast Track designation for the use of labafenogene marselecobac for the treatment of PKU.  In addition, in April 

2018, the FDA granted Fast Track designation for the use of SYNB1618 for the treatment of PKU. In August 2022, the FDA granted Fast Track 
designation for the use of SYNB1353 for the treatment of HCU. In January of 2023, Synlogic announced the FDA’s granting of RPDD for SYNB1353 for 
HCU and for SYNB1934 for PKU. 

Accelerated Approval Pathway

In addition, 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 from the FDA and may be approved on the basis of adequate and well-controlled clinical 
trials establishing that the drug product has an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit. The FDA may also grant 
accelerated approval for such a drug or biologic when the product has an effect on an intermediate clinical endpoint that can be measured earlier than an 
effect on irreversible morbidity or mortality, or IMM, and that is reasonably likely to predict an effect on IMM or other clinical benefit, taking into account 
the severity, rarity, or prevalence of the condition and the availability or lack of alternative treatments. As a condition of approval, the FDA may require 
that a sponsor of a drug receiving accelerated approval perform post-marketing clinical trials to verify and describe the predicted effect on IMM or other 
clinical endpoint, and the product may be subject to expedited withdrawal procedures. Drugs and biologics granted accelerated approval must meet the 
same statutory standards for safety and effectiveness as those granted traditional approval.

For the purposes of accelerated approval, a surrogate endpoint is a marker, such as a laboratory measurement, radiographic image, physical sign, or 

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

The accelerated approval pathway is most often used in settings in which the course of a disease is long and an extended period of time is required 

to measure the intended clinical benefit of a drug, even if the effect on the surrogate or intermediate clinical endpoint occurs rapidly. For example, 
accelerated approval has been used extensively in the development and approval of drugs for treatment of a variety of cancers in which the goal of therapy 
is generally to improve survival or decrease morbidity and the duration of the typical disease course requires lengthy and sometimes large clinical trials to 
demonstrate a clinical or survival benefit.

The accelerated approval pathway is usually contingent on a sponsor’s agreement to conduct, in a diligent manner, additional post-approval 
confirmatory studies to verify and describe the drug’s clinical benefit. As a result, a product candidate approved on this basis is subject to rigorous post-
marketing compliance requirements, including the completion of Phase 4 or post-approval clinical trials to confirm the effect on the clinical endpoint. 
Failure to conduct required post-approval studies, or to confirm the predicted clinical benefit of the product during post-marketing studies, would allow the 
FDA to withdraw approval of the drug. All promotional materials for product candidates being considered and approved under the accelerated approval 
program are subject to prior review by the FDA.

As part of the Consolidated Appropriations Act for 2023, Congress provided FDA additional statutory authority to mitigate potential risks to 

patients from continued marketing of ineffective drugs previously granted accelerated approval. Under the Act’s amendments to the FDCA, FDA may 
require the sponsor of a product granted accelerated approval to have a confirmatory trial underway prior to approval. The sponsor must also submit 
progress reports on a confirmatory trial every six months until the trial is complete, and such reports are published on FDA’s website. The amendments also 
give FDA the option of using expedited procedures to withdraw product approval if the sponsor’s confirmatory trial fails to verify the claimed clinical 
benefits of the product.

Post-Approval Requirements

Following approval of a new product, the manufacturer and the approved product are subject to pervasive and continuing regulation by the FDA, 

including, among other things, monitoring and recordkeeping activities, reporting of adverse experiences with 

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the product, product sampling and distribution restrictions, complying with promotion and advertising requirements, which include restrictions on 
promoting biologics for unapproved uses or patient populations (i.e., “off-label use”) and limitations on industry-sponsored scientific and educational 
activities. Although physicians may prescribe legally available products for off-label uses, manufacturers may not market or promote such uses. 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. If there are any modifications to the product, including changes in indications, labeling or 
manufacturing processes or facilities, the applicant may be required to submit and obtain FDA approval of a new BLA or a BLA supplement, which may 
require the applicant to develop additional data or conduct additional pre-clinical studies and clinical trials. The FDA may also place other conditions on 
approvals including the requirement for a REMS to assure the safe use of the product. A REMS could include medication guides, physician communication 
plans or elements to assure safe use, such as restricted distribution methods, patient registries and other risk minimization tools. Any of these limitations on 
approval or marketing could restrict the commercial promotion, distribution, prescription or dispensing of products. Product approvals may be withdrawn 
for non-compliance with regulatory standards or if problems occur following initial marketing.

FDA regulations require that products be manufactured in specific approved facilities and in accordance with cGMPs. The cGMP regulations 
include requirements relating to organization of personnel, buildings and facilities, equipment, control of components and finished product containers and 
closures, production and process controls, packaging and labeling controls, holding and distribution, laboratory controls, records and reports and returned 
or salvaged products. The manufacturing facilities for our product candidates must meet cGMP requirements and satisfy the FDA or comparable foreign 
regulatory authorities before any product is approved and our commercial products can be manufactured. We rely, and expect to continue to rely, on third 
parties for the production of clinical and commercial quantities of our products in accordance with cGMP regulations. These manufacturers must comply 
with cGMP regulations that require, among other things, quality control and quality assurance, the maintenance of records and documentation and the 
obligation to investigate and correct any deviations from cGMP. Manufacturers and other entities involved in the manufacture and distribution of approved 
drugs or biologics are required to register their establishments with the FDA and certain state agencies and are subject to periodic prescheduled or 
unannounced inspections by the FDA and certain state agencies for compliance with cGMP and other laws. Accordingly, manufacturers must continue to 
expend time, money and effort in the area of production and quality control to maintain cGMP compliance. Future inspections by the FDA and other 
regulatory agencies may identify compliance issues at the facilities of our CMOs that may disrupt production or distribution or require substantial resources 
to correct. In addition, the discovery of conditions that violate these rules, including failure to conform to cGMPs, could result in enforcement actions, and 
the discovery of problems with a product after approval may result in restrictions on a product, manufacturer or holder of an approved BLA, including 
voluntary recall and regulatory sanctions as described below.

Once an approval is granted, the FDA may withdraw the approval if compliance with regulatory standards is not maintained or if problems occur or 
are discovered after the product reaches the market. Later discovery of previously unknown problems with a product may result in mandatory revisions to 
the approved labeling to add new safety information; imposition of post-market or clinical trials to assess new safety risks; or imposition of distribution or 
other restrictions under a REMS program. Other potential consequences include, among other things:

•

•

•

•

•

•

Restrictions on the marketing or manufacturing of the product, complete withdrawal of the product from the market or product recalls;

Fines, warning letters or other enforcement-related letters or clinical holds on post-approval clinical trials;

Refusal of the FDA to approve pending NDAs/BLAs or supplements to approved NDAs/BLAs, or suspension or revocation of product 
approvals;

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

Injunctions or the imposition of civil or criminal penalties; and

Consent decrees, corporate integrity agreements, debarment, or exclusion from federal health care programs; or mandated modification of 
promotional materials and labeling and the issuance of corrective information.

In addition, the distribution of prescription pharmaceutical products is subject to the Prescription Drug Marketing Act, or PDMA, which regulates 

the distribution of drugs and drug samples at the federal level and sets minimum standards for the registration and regulation of drug distributors by the 
states. Both the PDMA and state laws limit the distribution of prescription pharmaceutical product samples and impose requirements to ensure 
accountability in distribution. Most recently, the Drug Supply Chain Security Act, or DSCSA, was enacted with the aim of building an electronic system to 
identify and trace certain prescription drugs distributed in the United States, including most biological products. The DSCSA mandates phased-in and 
resource-intensive obligations for pharmaceutical manufacturers, wholesale distributors, and dispensers over a ten-year period, which culminated in 
November 2023. 

25

 
 
 
 
 
 
 
 
 
 
Most recently, the FDA announced a one-year stabilization period to November 2024, giving entities subject to the DSCSA additional time to finalize 
interoperable tracking systems and to ensure supply chain continuity.

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

the approval, manufacturing and marketing of products regulated by the FDA. It is impossible to predict whether further legislative changes will be 
enacted, or FDA regulations, guidance or interpretations will be changed or what the impact of such changes, if any, may be.

Foreign Regulation

In addition to regulations in the United States, we will be subject to a variety of foreign regulations governing the performance of clinical trials 
outside the United States and commercial sales and distribution of our products outside of the United States. Whether or not we obtain FDA approval for a 
product candidate, we must obtain approval by the comparable regulatory authorities of foreign countries or economic areas, such as the European Union, 
before we may commence clinical trials or market products in those countries or areas. The approval process and requirements governing the conduct of 
clinical trials, product licensing, pricing and reimbursement vary greatly between countries and jurisdictions and can involve additional testing and 
additional administrative review periods. The time required to obtain approval in other countries and jurisdictions might differ from and be longer than that 
required to obtain FDA approval. Regulatory approval in one country or jurisdiction does not ensure regulatory approval in another, but a failure or delay in 
obtaining regulatory approval in one country or jurisdiction may negatively impact the regulatory process in others.

European Union drug development, review and approval

In the European Union, our product candidates also may be subject to extensive regulatory requirements. As in the United States, medicinal products 

can be marketed only if a marketing authorization from the competent regulatory agencies has been obtained. Similar to the United States, the various 
phases of pre-clinical and clinical research in the European Union are subject to significant regulatory controls.

The new Clinical Trials Regulation, (EU) No 536/2014, which took effect on January 31, 2022, aims to simplify and streamline the approval of 

clinical trials in the European Union. The main characteristics of the regulation include: a streamlined application procedure via a single entry point, the 
“EU clinical trial portal and database”; 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 appointed reporting member state, whose assessment report is submitted for review by the sponsor and all other competent authorities of all 
European Union member states in which an application for authorization of a clinical trial has been submitted (Concerned Member States). Part II is 
assessed separately by each Concerned Member State. 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 Member State. However, overall 
related timelines will be defined by the Clinical Trials Regulation.

As in the United States, similar requirements for posting clinical trial information are described in the European Union (EudraCT) website: 

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

To obtain a marketing authorization of a drug in the European Union, we may submit marketing authorization applications, or MAA, either under 

the so-called centralized or national authorization procedures.

Centralized procedure

The centralized procedure provides for the grant of a single marketing authorization following a favorable opinion by the European Medicines 
Agency (the EMA) that is valid in all EU member states, as well as Iceland, Liechtenstein and Norway. The centralized procedure is compulsory for 
medicines produced by specified biotechnological processes, products designated as orphan medicinal products, advanced-therapy medicines (such as 
gene-therapy, somatic cell-therapy or tissue-engineered medicines) and products with a new active substance indicated for the treatment of specified 
diseases, such as HIV/AIDS, cancer, diabetes, neurodegenerative disorders or autoimmune diseases and other immune dysfunctions and viral diseases. The 
centralized procedure is optional for products that represent a significant therapeutic, scientific or technical innovation, or whose authorization would be in 
the interest of public health. Under the centralized procedure the maximum timeframe for the evaluation of an MAA by the EMA is 210 days, excluding 
clock stops, when additional written or oral information is to be provided by the applicant in response to questions asked by the Committee for Medicinal 
Products for Human Use, or the CHMP. Accelerated assessment may be granted by the CHMP in exceptional cases, when a medicinal product is expected 
to be of a major public health interest, particularly from the point of view 

26

 
 
 
 
 
 
 
 
 
 
 
of therapeutic innovation. The timeframe for the evaluation of an MAA under the accelerated assessment procedure is of 150 days, excluding stop-clocks.

National authorization procedures

There are also two other possible routes to authorize medicinal products in several EU countries, which are available for investigational medicinal 

products that fall outside the scope of the centralized procedure:

Decentralized procedure. Using the decentralized procedure, an applicant may apply for simultaneous authorization in more than one EU country of 

medicinal products that have not yet been authorized in any EU country and that do not fall within the mandatory scope of the centralized procedure.

Mutual recognition procedure. In the mutual recognition procedure, a medicine is first authorized in one EU member state, in accordance with the 

national procedures of that country. Following this, further marketing authorizations can be sought from other EU countries in a procedure whereby the 
countries concerned agree to recognize the validity of the original, national marketing authorization.

Under the above-described procedures, before granting the marketing authorization, the EMA or the competent authorities of the member states of 

the EEA make an assessment of the risk-benefit balance of the product on the basis of scientific criteria concerning its quality, safety and efficacy.

Conditional approval

In specific circumstances, EU legislation (Article 14(7) Regulation (EC) No 726/2004 and Regulation (EC) No 507/2006 on Conditional Marketing 

Authorizations for Medicinal Products for Human Use) enables applicants 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 (1) the risk-benefit balance of the product candidate is positive, (2) it is likely 
that the applicant will be in a position to provide the required comprehensive clinical trial data, (3) the product fulfills unmet medical needs and (4) 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 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 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.

Pediatric studies

Prior to obtaining a marketing authorization in the European Union, applicants have to demonstrate compliance with all measures included in an 

EMA-approved Pediatric Investigation Plan, or PIP, covering all subsets of the pediatric population, unless the EMA has granted a product-specific waiver, 
a class waiver, or a deferral for one or more of the measures included in the PIP. The respective requirements for all marketing authorization procedures are 
set forth in Regulation (EC) No 1901/2006, which is referred to as the Pediatric Regulation. This requirement also applies when a company wants to add a 
new indication, pharmaceutical form or route of administration for a medicine that is already authorized. The Pediatric Committee of the EMA, or PDCO, 
may grant deferrals for some medicines, allowing a company to delay development of the medicine in children until there is enough information to 
demonstrate its effectiveness and safety in adults. The PDCO may also grant waivers when development of a medicine in children is not needed or is not 
appropriate, such as for diseases that only affect the elderly population.

Before a marketing authorization application can be filed, or an existing marketing authorization can be amended, the EMA determines that 

companies actually comply with the agreed studies and measures listed in each relevant PIP.

European Union regulatory exclusivity

In the European Union, new products authorized for marketing (i.e., reference products) qualify for eight years of data exclusivity and an additional 

two years of market exclusivity upon marketing authorization. The data exclusivity period prevents generic or biosimilar applicants from relying on the 
pre-clinical and clinical trial data contained in the dossier of the reference product 

27

 
 
 
 
 
 
 
 
 
 
 
 
 
when applying for a generic or biosimilar marketing authorization in the European Union during a period of eight years from the date on which the 
reference product was first authorized in the European Union. The market exclusivity period prevents a successful generic or biosimilar applicant from 
commercializing its product in the EU until ten years have elapsed from the initial authorization of the reference product in the EU. The ten-year market 
exclusivity period can be extended to a maximum of eleven years if, during the first eight years of those ten years, the marketing authorization holder 
obtains an authorization for one or more new therapeutic indications which, during the scientific evaluation prior to their authorization, are held to bring a 
significant clinical benefit in comparison with existing therapies.

European Union orphan designation and exclusivity

The criteria for designating an orphan medicinal product in the European Union, 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 European Union when the 
application is made, or (b) the product, without the benefits derived from orphan status, would not generate sufficient return in the European Union to 
justify investment; and (3) there exists no satisfactory method of diagnosis, prevention or treatment of such condition authorized for marketing in the 
European Union, or if such a method exists, the product will be of significant benefit to those affected by the condition, as defined in Regulation (EC) 
847/2000. 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. The application for orphan designation must be submitted 
before the application for marketing authorization. The applicant 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 European Union 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:

•

•

•

The second applicant can establish that its product, although similar, is safer, more effective or otherwise clinically superior; 

The applicant consents to a second orphan medicinal product application; or 

The applicant cannot supply enough orphan medicinal product.

PRIME designation

The EMA grants access to the Priority Medicines, or PRIME, program to investigational medicines for which it determines there to be preliminary 

clinical data available showing the potential to address an unmet medical need and bring a major therapeutic advantage to patients. Many benefits accrue to 
sponsors of product candidates with PRIME designation, including but not limited to, early and proactive regulatory dialogue with the EMA, frequent 
discussions on clinical trial designs and other development program elements, and accelerated marketing authorization application assessment once a 
dossier has been submitted. Importantly, a dedicated Agency contact and rapporteur from the Committee for Human Medicinal Products, or CHMP, or 
Committee for Advanced Therapies, or CAT, are appointed early in PRIME scheme facilitating increased understanding of the product at EMA’s 
Committee level. A kick-off meeting initiates these relationships and includes a team of multidisciplinary experts at the EMA to provide guidance on the 
overall development and regulatory strategies.

A marketing authorization is valid for five years in principle and the marketing authorization may be renewed after five years on the basis of a re-

evaluation of the risk-benefit balance by the EMA or by the competent authority of the authorizing member state. To this end, the marketing authorization 
holder must provide the EMA or the competent authority with a consolidated version of the file in respect of quality, safety and efficacy, including all 
variations introduced since the marketing authorization was granted, at least six months before the marketing authorization ceases to be valid. Once 
renewed, the marketing authorization is valid for an unlimited period, unless the European Commission or the competent authority decides, on justified 
grounds relating to pharmacovigilance, to proceed with one additional five-year renewal. Any authorization which is not followed by the actual placing of 
the drug on the E.U. market (in case of centralized procedure) or on the market of the authorizing member state within three years after authorization ceases 
to be valid (the so-called sunset clause).

United Kingdom Regulation

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From January 1, 2021, European Union law no longer directly applies in the United Kingdom. The United Kingdom has adopted existing European 
Union medicines regulation as standalone United Kingdom legislation with some amendments to reflect procedural and other requirements with respect to 
marketing authorizations and other regulatory provisions.

The Medicines and Healthcare products Regulatory Agency, or MHRA is responsible for regulating the United Kingdom medicinal products market 

(Great Britain and Northern Ireland). In order to market medicines in the United Kingdom, manufacturers must hold a United Kingdom authorization. On 
January 1, 2021, all European Union marketing authorizations were converted to United Kingdom marketing authorizations subject to a manufacturer opt-
out. The United Kingdom has introduced a separate UK-specific processes for regulatory submissions and medicinal product marketing authorization, and 
the MHRA guidance states that the United Kingdom will have the power to take into account marketing authorizations made under the European Union 
decentralized and mutual recognition procedures. On January 1, 2024, the MHRA launched the International Recognition Procedure, or IRP, which 
provides for an expedited authorization procedure for products that have received positive marketing authorization decisions from trusted partner agencies, 
such as the EMA or the FDA. There are two available routes for assessment and recognition under the IRP:

•

Recognition Route A – 60 days from validation of submission

•

•

•

•

Application must be based on a Reference Regulatory, or RR, marketing authorization within the previous two years 

Any significant differences from the quality dossier approved by the RR requires assessment under Recognition Route B

Evidence of GMP compliance for manufacturing sites should be provided with submission

None of the Recognition Route B criteria are met

•

Recognition Route B - 110 days from validation of submission with one planned clock stop (up to 60 days) at day 70 to allow applicant to 
respond to issues identified during review

•

•

Application must be based on a RR marketing authorization within the previous ten years.

Criteria requiring Recognition Route B include, among other things:

•

•

•

•

•

•

•

The RR granted a conditional or exceptional circumstances marketing authorization

Additional manufacturing sites included in the application were not assessed by the RR or a manufacturing site is not GMP 
certified

There are substantial changes to the manufacturing process compared to the process approved by the RR

Certain product types (e.g., advanced therapy medicinal products, orphan medicines, over-the-counter medicines)

A Risk Management Plan was not assessed by the RR

The RR required one or more post-authorization safety studies for the product

A companion diagnostic is necessary for correct use of the product

United Kingdom medicines legislation is subject to future regulatory change under the Medicines and Medical Devices Act 2021. This act sets out a 

new framework for the adoption of medicines regulation.

Different rules will apply in Northern Ireland following implementation of the Northern Ireland Protocol. In Northern Ireland, European Union 

central marketing applications will continue to apply.

The Trade and Cooperation Agreement, which sets forth a framework for partnership between the European Union and the United Kingdom, 
became effective as of January 1, 2021. The Trade and Cooperation Agreement contains an Annex in relation to medicinal products with the objective of 
facilitating availability of medicines, promotion of public health and consumer protection in respect of medicinal products between the United Kingdom 
and the European Union. The Annex provides for mutual recognition of Good Manufacturing Practice (GMP) inspections and certificates, meaning that 
manufacturing facilities do not need to undergo duplicate inspections for the two markets. The Annex establishes a Working Group on Medicinal Products 
to deal with matters under the Trade and Cooperation Agreement, facilitate co-operation and for the carrying out of technical discussions. It is expected that 
further bilateral discussions will continue with respect to regulatory areas not the subject of the Trade and Cooperation Agreement, including 
pharmacovigilance. The Trade and Cooperation Agreement also does not include reciprocal arrangements for the recognition of batch testing certification. 
However, the United Kingdom has listed approved countries, including the EEA which will 

29

 
 
 
 
 
 
enable United Kingdom importers and wholesales to recognize certain certification and regulatory standards. The European Commission has not adopted 
such recognition procedures.

It is expected that the establishment of a separate United Kingdom authorization system, albeit with transitional recognition procedures in the United 

Kingdom, will lead to additional regulatory costs. In addition, additional regulatory costs will be incurred with respect to the lack of mutual recognition of 
batch testing and related regulatory measures.

Rest of the world regulation

For other countries outside of the European Union and the United States, such as countries in Eastern Europe, Latin America or Asia, the 

requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary from jurisdiction to jurisdiction. Additionally, the 
clinical trials must be conducted in accordance with GCP requirements and the applicable regulatory requirements and the ethical principles that have their 
origin in the Declaration of Helsinki.

If we fail to comply with applicable foreign regulatory requirements, we may be subject to, among other things, fines, suspension or withdrawal of 

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

Coverage, Pricing and Reimbursement

Sales of pharmaceutical products depend in significant part on the availability of third-party coverage and reimbursement. Third-party payors 

include government healthcare programs such as Medicare, managed care providers, private health insurers and other organizations. We anticipate third-
party payors will provide reimbursement for our products. However, these third-party payors are increasingly challenging the price and examining the cost 
effectiveness of medical products and services. In addition, significant uncertainty exists as to the reimbursement status of newly approved healthcare 
products. 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 often rely on Medicare coverage policy and 
payment limitations in setting their own reimbursement rates but also have their own methods to individually establish coverage and reimbursement 
policies. As a result, obtaining coverage and adequate reimbursement can be a time-consuming and costly process. Third-party payors may limit coverage 
to specific products on an approved list, or formulary, which might not include all of the approved products for a particular indication. We may need to 
conduct expensive pharmacoeconomic studies in order to demonstrate the medical necessity and cost effectiveness of our products. Moreover, a payor’s 
decision to provide coverage for a drug product does not imply that an adequate reimbursement rate will be approved. Third-party reimbursement may not 
be sufficient to maintain price levels high enough to realize an appropriate return on investment in product development. Our product candidates may not 
be considered cost effective. It is time-consuming and expensive for us to seek reimbursement from third-party payors. Reimbursement may not be 
available or sufficient to allow us to sell our products on a competitive and profitable basis.

Medicare is a federal healthcare program administered by the federal government that covers individuals aged 65 and over as well as individuals 

with certain disabilities. Drugs may be covered under one or more sections of Medicare depending on the nature of the drug and the conditions associated 
with and site of administration. For example, under Part D, Medicare beneficiaries may enroll in prescription drug plans offered by private entities which 
provide coverage for outpatient prescription drugs. Part D plans include both stand-alone prescription drug benefit plans and prescription drug coverage as 
a supplement to Medicare Advantage plans. Unlike Medicare Parts A and B, Part D coverage is not standardized. Part D prescription drug plan sponsors 
are not required to pay for all covered Part D drugs, and each drug plan can develop its own drug formulary that identifies which drugs it will cover and at 
what tier or level.

Medicare Part B covers most injectable drugs given in an in-patient setting and some drugs administered by a licensed medical provider in hospital 

outpatient departments and doctors’ offices. Medicare Part B is administered by Medicare Administrative Contractors, which generally have the 
responsibility of making coverage decisions. Subject to certain payment adjustments and limits, Medicare generally pays for a Part B-covered drug based 
on a percentage of manufacturer-reported average sales price, which is regularly updated. We believe that our product candidates that are intended to be 
administered intratumorally will be subject to the Medicare Part B rules.

We expect that there will continue to be a number of federal and state proposals to implement governmental pricing controls and limit the growth of 

healthcare costs, including the cost of prescription drugs. For example, the ACA enacted in March 2010, was expected to have a significant impact on the 
health care industry. The ACA has been under scrutiny by the U.S. Congress almost since its passage, and certain sections of the ACA have not been fully 
implemented or effectively repealed. As a result, its longevity continues to be uncertain. In addition, ongoing initiatives in the U.S. have increased and will 
continue to increase pressure on drug pricing. The announcement or adoption of any such initiative could have an adverse effect on potential revenues from 
any product candidate that we may successfully develop.

30

 
 
 
 
 
 
 
 
 
 
In addition, in some foreign countries, the proposed pricing for a drug must be approved before it may be lawfully marketed. The requirements 

governing drug pricing vary widely from country to country. Moreover, a payor’s decision to provide coverage for a drug product does not imply that an 
adequate reimbursement rate will be approved. Third-party reimbursement may not be sufficient to maintain price levels high enough to realize an 
appropriate return on investment in product development. For example, the European Union provides options for its member states to restrict the range of 
medicinal products for which their national health insurance systems provide reimbursement and to control the prices of medicinal products for human use. 
A member state may approve a specific price for the medicinal product, or it may instead adopt a system of direct or indirect controls on our profitability 
placing the medicinal product on the market. Other member states allow companies to fix their own prices for drug products but monitor and control 
prescription volumes and issue guidance to physicians to limit prescriptions. There can be no assurance that any country that has price controls or 
reimbursement limitations for pharmaceutical products will allow favorable reimbursement and pricing arrangements for any of our products. Historically, 
products launched in the European Union and other countries do not follow price structures of the United States and generally prices tend to be 
significantly lower.

The downward pressure on health care costs in general, particularly prescription drugs, has become intense. As a result, increasingly high barriers 

are being erected to the entry of new products. In addition, there can be considerable pressure by governments and other stakeholders on prices and 
reimbursement levels, including as part of cost containment measures. Political, economic and regulatory developments may further complicate pricing 
negotiations, and pricing negotiations may continue after reimbursement has been obtained. Reference pricing used by various EU member states and 
parallel distribution (arbitrage between low-priced and high-priced member states) can further reduce prices. Any country that has price controls or 
reimbursement limitations for drug products may not allow favorable reimbursement and pricing arrangements.

Other U.S. Health Care Laws and Regulations

If our product candidates are approved in the United States, we will have to comply with various U.S. federal and state laws, rules and regulations 
pertaining to health care fraud and abuse, including anti-kickback laws and physician self-referral laws, rules and regulations. Violations of the fraud and 
abuse laws are punishable by criminal and civil sanctions, including, in some instances, exclusion from participation in federal and state health care 
programs, including Medicare and Medicaid. These laws include:  

•

•

•

•

•

The federal anti-kickback statute prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or paying 
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 health care program such as 
Medicare and Medicaid. A person or entity does not need to have actual knowledge of the AKS or specific intent to violate it to have 
committed a violation. In addition, the government may assert that a claim including items or services resulting from a violation of the AKS 
constitutes a false or fraudulent claim for purposes of the FCA or federal civil money penalties statute;

The federal civil and criminal false claims laws and civil monetary penalty laws, including the federal False Claims Act, which prohibit, among 
other things, individuals or entities from knowingly presenting, or causing to be presented, false or fraudulent claims for payment to, or 
approval by Medicare, Medicaid, or other federal health care programs, knowingly making, using or causing to be made or used a false record 
or statement material to a false or fraudulent claim or an obligation to pay or transmit money to the federal government, or knowingly 
concealing or knowingly and improperly avoiding or decreasing or concealing an obligation to pay money to the federal government. 
Manufacturers can be held liable under the FCA even when they do not submit claims directly to government payers if they are deemed to 
“cause” the submission of false or fraudulent claims. The FCA also permits a private individual acting as a “whistleblower” to bring actions on 
behalf of the federal government alleging violations of the FCA and to share in any monetary recovery;   

The federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, imposes criminal and civil liability for executing a scheme 
to defraud any health care benefit program or making false statements relating to health care matters; 

HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, or HITECH Act, and its implementing 
regulations, also imposes obligations, including mandatory contractual terms, with respect to safeguarding the privacy, security and 
transmission of individually identifiable health information; 

The federal transparency requirements under the Physician Payments Sunshine Act require manufacturers of FDA-approved drugs, devices, 
biologics and medical supplies covered by Medicare, Medicaid or the Children’s Health Insurance Program to report, on an annual basis, to the 
Centers for Medicare and Medicaid Services (CMS) information related to payments and other transfers of value to physicians, certain 
advanced non-physician health care practitioners, and teaching hospitals or to entities or individuals at the request of, or designated on behalf 
of, such physicians, non-physician health care practitioners, and teaching hospitals as well as certain ownership and investment interests held 
by physicians and their immediate family members; and

31

 
 
 
 
 
 
 
 
 
 
 
•

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

In November 2020, HHS finalized significant changes to the regulations implementing the Anti-Kickback Statute, as well as the Physician Self-

Referral Law (Stark Law) and the civil monetary penalty rules regarding beneficiary inducements, with the goal of offering the healthcare industry more 
flexibility and reducing the regulatory burden associated with those fraud and abuse laws, particularly with respect to value-based arrangements among 
industry participants.

Finally, the majority of states also have statutes or regulations similar to the aforementioned federal laws, some of which are broader in scope and 

apply to items and services reimbursed under Medicaid and other state programs, or, in several states, apply regardless of the payor. Some state laws 
require pharmaceutical companies to comply with the pharmaceutical industry’s voluntary compliance guidelines, or the relevant compliance guidance 
promulgated by the federal government, in addition to requiring drug manufacturers to report information related to payments to physicians and other 
health care providers or marketing expenditures to the extent that those laws impose requirements that are more stringent than the Physician Payments 
Sunshine Act. 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.

Because of the breadth of these laws and the narrowness of their exceptions and safe harbors, it is possible that business activities can be subject to 

challenge under one or more of such laws. The scope and enforcement of each of these laws is uncertain and subject to rapid change in the current 
environment of healthcare reform, especially in light of the lack of applicable precedent and regulations. Federal and state enforcement bodies have 
recently increased their scrutiny of interactions between healthcare companies and healthcare providers, which has led to a number of investigations, 
prosecutions, convictions and settlements in the healthcare industry.

Ensuring that business arrangements with third parties comply with applicable healthcare laws and regulations is costly and time consuming. If 
business operations are found to be in violation of any of the laws described above or any other applicable governmental regulations a pharmaceutical 
manufacturer may be subject to penalties, including civil, criminal and administrative penalties, damages, fines, disgorgement, individual imprisonment, 
exclusion from governmental funded healthcare programs, such as Medicare and Medicaid, contractual damages, reputational harm, diminished profits and 
future earnings, additional reporting obligations and oversight if subject to a corporate integrity agreement or other agreement to resolve allegations of non-
compliance with these laws, and curtailment or restructuring of operations, any of which could adversely affect a pharmaceutical manufacturer’s ability to 
operate its business and the results of its operations.

Health Care Reform in the US and Potential Changes to Health Care Laws

The FDA’s and other regulatory authorities’ policies may change, and additional government regulations may be enacted that could prevent, limit or 

delay regulatory approval of our product candidates. For example, Congress must reauthorize the FDA’s user fee programs every five years and often 
makes changes to those programs in addition to policy or procedural changes that may be negotiated between the FDA and industry stakeholders as part of 
this periodic reauthorization process. Congress most recently reauthorized the user fee programs in September 2022 but without any substantive policy 
changes. If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies, or if we are not able to 
maintain regulatory compliance, we may lose any marketing approval that we otherwise may have obtained and we may not achieve or sustain profitability, 
which would adversely affect our business, prospects, financial condition and results of operations.

As previously mentioned, the primary trend in the U.S. health care industry and elsewhere is cost containment. Government authorities and other 

third-party payors have attempted to control costs by limiting coverage and the amount of reimbursement for particular medical products and services, 
implementing reductions in Medicare and other health care funding and applying new payment methodologies. For example, in March 2010, the ACA was 
enacted, which, among other things, increased the minimum Medicaid rebates owed by most manufacturers under the Medicaid Drug Rebate Program; 
introduced a new methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs that are 
inhaled, infused, instilled, implanted or injected; extended the Medicaid Drug Rebate Program to utilization of prescriptions of individuals enrolled in 
Medicaid managed care plans; imposed mandatory discounts for certain Medicare Part D beneficiaries as a condition for manufacturers’ outpatient drugs 
coverage under Medicare Part D; and established a Center for Medicare Innovation at CMS to test innovative payment and service delivery models to 
lower Medicare and Medicaid spending.

32

 
 
 
 
 
 
 
 
 
 
 
Legislative and regulatory changes under the ACA are possible, but it is unknown what form any such changes or any law would take and how or 

whether it may affect the biopharmaceutical industry as a whole or Elicio’s business in the future. Elicio expects that changes or additions to the ACA, the 
Medicare and Medicaid programs, and changes stemming from other health care reform measures, especially with regard to health care access, financing or 
other legislation in individual states, could have a material adverse effect on the health care industry in the United States.

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

has resulted in several Congressional inquiries and proposed and enacted federal and state legislation designed to, among other things, bring more 
transparency to product pricing, review the relationship between pricing and manufacturer patient programs, and reform government program 
reimbursement methodologies for drug products. Notably the Further Consolidated Appropriations Act for 2020 into law (P.L. 116-94), which became law 
on December 20, 2019 includes a piece of bipartisan legislation called the Creating and Restoring Equal Access to Equivalent Samples Act of 2019 (the 
CREATES Act). The CREATES Act aims to address the concern articulated by both the FDA and others in the industry that some brand manufacturers 
have improperly restricted the distribution of their products, including by invoking the existence of a REMS for certain products, to deny generic and 
biosimilar product developers access to samples of brand products. Because generic and biosimilar product developers need samples to conduct certain 
comparative testing required by the FDA, some have attributed the inability to timely obtain samples as a cause of delay in the entry of generic and 
biosimilar products. To remedy this concern, the CREATES Act establishes a private cause of action that permits a generic or biosimilar product developer 
to sue the brand manufacturer to compel it to furnish the necessary samples on “commercially reasonable, market-based terms.” Whether and how generic 
and biosimilar product developments will use this new pathway, as well as the likely outcome of any legal challenges to provisions of the CREATES Act, 
remain highly uncertain and its potential effects on our future commercial products are unknown.

More recently, in August 2022, President Biden signed into the law the Inflation Reduction Act of 2022, or the IRA. Among other things, the IRA 

has multiple provisions that may impact the prices of drug products that are both sold into the Medicare program and throughout the United States. Starting 
in 2023, a manufacturer of a drug or biological product covered by Medicare Parts B or D must pay a rebate to the federal government if the drug product’s 
price increases faster than the rate of inflation. This calculation is made on a drug product by drug product basis and the amount of the rebate owed to the 
federal government is directly dependent on the volume of a drug product that is paid for by Medicare Parts B or D. Additionally, starting in payment year 
2026, CMS will negotiate drug prices annually for a select number of single source Part D drugs without generic or biosimilar competition. CMS will also 
negotiate drug prices for a select number of Part B drugs starting for payment year 2028. If a drug product is selected by CMS for negotiation, it is 
expected that the revenue generated from such drug will decrease. CMS has begun to implement these new authorities and entered into the first set of 
agreements with pharmaceutical manufacturers to conduct price negotiations in October 2023. However, the IRA’s impact on the pharmaceutical industry 
in the United States remains uncertain, in part because multiple large pharmaceutical companies and other stakeholders (e.g., the U.S. Chamber of 
Commerce) have initiated federal lawsuits against CMS arguing the program is unconstitutional for a variety of reasons, among other complaints. Those 
lawsuits are currently ongoing.

In addition to the IRA’s drug price negotiation provisions, President Biden’s Executive Order 14087, issued in October 2022, called for the CMS 

innovation center to prepare and submit a report to the White House on potential payment and delivery modes that would complement to IRA, lower drug 
costs, and promote access to innovative drugs. In February 2023, CMS published its report which described three potential models focusing on 
affordability, accessibility and feasibility of implementation for further testing by the CMS Innovation Center. As of February 2024, the CMS Innovation 
Center continues to test the proposed models and has started to roll out plans for access model testing of certain product types (e.g., cell and gene therapies) 
by states and manufacturers. 

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. For 
example, in recent years, several states have formed prescription drug affordability boards (PDABs). Much like the IRA’s drug price negotiation program, 
these PDABs have attempted to implement upper payment limits (UPLs) on drugs sold in their respective states in both public and commercial health 
plans. For example, in August 2023, Colorado’s PDAB announced a list of five prescription drugs that would undergo an affordability review. The effects 
of these efforts remain uncertain pending the outcomes of several federal lawsuits challenging state authority to regulate prescription drug payment limits. 
In December 2020, the U.S. Supreme Court held unanimously that federal law does not preempt the states’ ability to regulate pharmacy benefit managers 
(PBMs) and other members of the health care and pharmaceutical supply chain, an important decision that appears to be leading to further and more 
aggressive efforts by states in this area. The Federal Trade Commission in mid-2022 also launched sweeping investigations into the practices of the PBM 
industry that could lead to additional federal and state legislative or regulatory proposals targeting such entities’ operations, pharmacy networks, or 
financial arrangements. Significant efforts to change the PBM industry as it currently exists in the United States may affect the entire pharmaceutical 
supply chain and the business of other stakeholders, including biopharmaceutical developers like us. In addition, regional healthcare authorities and 
individual hospitals are increasingly using bidding procedures to determine what pharmaceutical products and which suppliers will be 

33

 
 
 
 
 
included in their prescription drug and other health care programs. These measures could reduce the ultimate demand for our products, once approved, or 
put pressure on our product pricing. 

We expect that these and other health care reform measures that may be adopted in the future, may result in more rigorous coverage criteria and in 

additional downward pressure on the price that we receive for any approved drug, which could have an adverse effect on customers for our product 
candidates. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private 
payors. 

There have been, and likely will continue to be, legislative and regulatory proposals at the foreign, federal and state levels directed at broadening the 
availability of health care and containing or lowering the cost of health care. The implementation of cost containment measures or other health care reforms 
may prevent us from being able to generate revenue, attain profitability, or commercialize our products. Such reforms could have an adverse effect on 
anticipated revenue from product candidates that we may successfully develop and for which we may obtain regulatory approval and may affect our overall 
financial condition and ability to develop product candidates.

Other Regulatory Matters

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the 

handling, use, storage, treatment and disposal of hazardous materials and wastes. These operations may involve the use of hazardous and flammable 
materials, including chemicals and biological materials. Our operations may also produce hazardous waste products. We contract with third parties for the 
disposal of these materials and wastes. Our products are defined as Genetically Modified Organisms (GMO) or Genetically Modified Micro-organisms 
(GMM) and, dependent on their classification and containment, may be subject to regulation.

The United States does not have any federal legislation that is specific to genetically modified organisms. GMOs are regulated pursuant to 

health, safety, and environmental legislation governing conventional products. The U.S. approach to regulating GMOs is premised on the assumption that 
regulation should focus on the nature of the products, rather than the process in which they were produced.

The clinical development and marketing of GMM within the European Union, and elsewhere, falls under different regulations and practices in 

each country, which may involve approval by environmental or other regulatory bodies, as well as health authorities, and may establish the requirement for 
a risk assessment for the testing or authorization of the product.

Manufacturing

We have made significant investments in our manufacturing organization, including process development and cGMP production infrastructure to 

establish manufacturing processes designed to support production of clinical trial material. The manufacturing processes are designed to enable us to 
reproducibly manufacture high quality living medicines at clinical scale and, later, at commercial scale to enable approval of our product candidates. We 
have built a fully integrated development and manufacturing organization with an internal process development group, quality group and manufacturing 
capabilities with the lease of cGMP cleanroom space in Waltham, Massachusetts. We currently work with an external contract manufacturing organizations 
(CMOs) for fill finish production of late-stage clinical trial material.

Clinical trial material for our Phase 1 study of SYNB1618 for PKU was manufactured by a CMO. These first clinical trials used a frozen liquid and 
solid formulation as the drug presentation. Since then, we have made additional investment in our formulation development that optimizes our production 
of solid dose formulations for our clinical programs. The powder for oral suspension formulation capability allows us to produce a more user-friendly 
presentation for clinical development and future commercial use. We are continuing to invest and investigate the utility of additional presentations for solid 
formulations of our Synthetic Biotics including capsules.

To enable the production of high levels of cells, or biomass, we can engineer our Synthetic Biotics with switches. These switches are comprised of 

transcription factor and promoter pairs that allow for controlled expression of the therapeutic effectors produced by our Synthetic Biotics. To ensure the 
metabolic capacity of the cells is allotted to the production of a high level of biomass during manufacturing, the effector circuits in the Synthetic Biotic 
programs are not expressed during this growth phase. At the end of the manufacturing process, the circuits are then induced, or activated. This two-step 
approach was designed to enable a high level of biomass production as well as to deliver the required activity necessary at the time of administration. We 
continue to devote resources to process development and the generation of improved products.

As we progress in clinical development, we will need to increase our production scale to support late-stage clinical trials and commercial 

manufacturing. We are in the process of assessing CDMOs who meet our criteria to supply our late-stage clinical 

34

 
 
 
 
 
 
 
 
 
development and commercial supply. We will compare the merits of working with one or more CDMOs who meet our criteria with the possibility of 
building cGMP manufacturing capacity and capabilities internally.

Competition

The biotechnology industry is extremely competitive in the race to develop new products. While we believe we have significant competitive 
advantages with our industry-leading expertise in synthetic biology and metabolic engineering of non-pathogenic bacteria, our clinical development 
expertise, and strong intellectual property position, we currently face and will continue to face competition for our development programs from companies 
that use synthetic biology or cell therapy development platforms and from companies focused on more conventional therapeutic modalities such as small 
molecules and antibodies. The competition is likely to come from multiple sources, including larger pharmaceutical companies, biotechnology companies 
and academia. Many of these competitors may have access to greater capital and resources than us. These competitors also compete with us in recruiting 
and retaining qualified scientific and management personnel, in establishing clinical trial sites and patient registration for clinical trials, and in accessing 
technologies to enable our programs. Not only will we compete with any existing therapies and those therapies currently in development, but we will also 
have to compete with new therapies that may become available in the future. Our competitors include other companies developing potential therapeutics for 
the same indications that we are pursuing for our drug candidates, regardless of modality.

Human Capital

As of March 12, 2024, we had 6 full-time employees. Of our full-time employees, 4 were primarily engaged in research and development activities. 

None of our employees are subject to a collective bargaining agreement. We believe that we have good relations with our employees.

Talent Acquisition and Retention

We recognize that our employees are essential to our success. To this end, we support business growth by seeking to attract and retain best-in-

class talent. We use internal and external resources to recruit highly skilled candidates for open positions. We believe that we are able to attract and retain 
the talent that is required to meet our business goals. 

Health, Safety and Wellness

We have always invested, and will continue to invest, in the health, safety, and wellness of our employees. We provide our employees with 

access to a variety of innovative, flexible, and convenient health and wellness programs. Program benefits are intended to provide protection and security, 
so employees can have peace of mind concerning events that may require time away from work or that may impact their financial well-being. We provide 
an Employee Assistance Program (“EAP”) which provides consultation, referrals and resources to help employees and their household manage everyday 
life and work challenges. We also reimburse for fitness and other similar programs, as well as offer periodic health challenges to encourage health and well-
being.

Diversity, Equity, and Inclusion

We believe a diverse workforce is critical to our success. Our mission is to value differences in races, ethnicities, religions, nationalities, genders, 

ages and sexual orientations, as well as education, skill sets and experience. We are focused on inclusive hiring practices, fair and equitable treatment, 
organizational flexibility and training and resources.

Training and Development

We believe in encouraging employees to be lifelong learners by providing ongoing learning and leadership training opportunities. While we 

strive to provide real-time recognition of employee performance, we have a formal annual review process not only to determine pay and equity adjustments 
tied to individual contributions, but to identify areas where employees may benefit from additional training and development opportunities.

Information About Our Executive Officers and Directors

The following persons were our executive officers and directors as of March 19, 2024:

Name

Executive Officers
Antoine Awad

Position

Principal Executive Officer

35

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Mary Beth Dooley
Directors
Peter Barrett, Ph.D. 
Michael Burgess, MB, CHB, Ph.D. 
Lisa Kelly-Croswell 
Michael Heffernan 

Patricia Hurter, Ph.D. 
Nick Leschly 
Edward Mathers 
Richard P. Shea 

Corporate Information and History

Head of Finance

Chairman of the Board of Directors, Partner at Atlas Venture
Interim Chief Medical Officer, Turnstone Biologics
SVP & Chief Human Resources Officer, Boston Medical Center Health System
Chief Executive Officer, Avenge Bio, Inc.

Former Chief Executive Officer, Lyndra Therapeutics
Chief Executive Officer, 2seventybio, Inc.
General Partner at New Enterprise Associates
Consulting CFO, Danforth Advisors

We were originally incorporated in the State of Delaware in December 2007 under the name “Mirna Therapeutics, Inc.” We carry on our business 

directly and through our subsidiaries.

Our subsidiary, Synlogic Operating Company, Inc. was incorporated in Delaware as TMC Therapeutics, Inc. on March 14, 2014. On July 15, 2014, 

TMC Therapeutics, Inc. changed its name to Synlogic, Inc. (Private Synlogic when referred to prior to the Merger (as defined below)). On July 2, 2015, the 
common and preferred shareholders of Private Synlogic executed the Synlogic, LLC Contribution Agreement, pursuant to which such common and 
preferred shareholders contributed such shareholders’ equity interests in Private Synlogic in exchange for common and preferred units in a newly formed 
parent company named Synlogic, LLC (the 2015 Reorganization). In addition, IBDCo was formed as a subsidiary of Synlogic, LLC, as part of the 2015 
Reorganization, and we entered into a license, option and merger agreement with AbbVie for the development of treatments for IBD. On December 22, 
2021, IBDCo was merged with and into Synlogic Operating Company, Inc. and IBDCo ceased to exist as a separate entity.

In May 2017, Private Synlogic completed a reorganization (2017 Reorganization) pursuant to which Synlogic, LLC merged with and into Private 

Synlogic, with Private Synlogic continuing as the surviving corporation. Pursuant to the 2017 Reorganization, the common units and preferred units of 
Synlogic, LLC, together consisting of Class A preferred units, contingently redeemable Class A preferred units and Class B preferred units, were 
exchanged for common stock and preferred stock of Private Synlogic, respectively. Additionally, Private Synlogic issued equity awards under the Synlogic 
2017 Stock Incentive Plan (2017 Plan) to replace the canceled incentive units pursuant to the termination of the Synlogic, LLC 2015 Equity Incentive Plan 
(2015 LLC Plan).

On August 28, 2017, Synlogic, Inc., formerly known as Mirna Therapeutics, Inc. (NASDAQ: MIRN) (Mirna), completed its business combination 

with Private Synlogic pursuant to the Agreement and Plan of Merger and Reorganization, dated as of May 15, 2017, by and among Mirna, Meerkat Merger 
Sub, Inc. (Merger Sub), and Private Synlogic (the Merger Agreement), pursuant to which Merger Sub merged with and into Private Synlogic, with Private 
Synlogic surviving as a wholly owned subsidiary of Mirna (the Merger). On August 25, 2017, in connection with, and prior to the completion of the 
Merger, Mirna effected a reverse stock split of its common stock (the Reverse Stock Split), and on August 28, 2017, immediately after completion of the 
Merger, Mirna changed its name to “Synlogic, Inc.” (NASDAQ: SYBX).

Under the terms of the Merger Agreement, Mirna issued shares of its common stock to Private Synlogic’s stockholders, using an exchange ratio, 

after taking into account the Reverse Stock Split, for each share of Private Synlogic common stock and preferred stock outstanding immediately prior to the 
Merger (Exchange Ratio). In addition, Mirna assumed all of the stock options outstanding under the 2017 Plan, with such stock options henceforth 
representing the right to purchase a number of shares of Mirna’s common stock equal to the Exchange Ratio multiplied by the number of shares of Private 
Synlogic common stock previously represented by such options. Mirna also assumed the 2017 Plan.

Our Internet address is www.synlogictx.com. Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and 

all amendments to those reports, are available to you free of charge through our website as soon as reasonably practicable after such materials have been 
electronically filed with, or furnished to, the Securities and Exchange Commission (SEC).

36

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Item 1A. Risk Factors. 

Investing in our common stock involves a high degree of risk. Our business, prospects, financial condition or operating results could be materially 

adversely affected by the risks identified below, as well as other risks not currently known to us or that we currently consider immaterial. Furthermore, 
these factors represent risks and uncertainties that could cause actual results to differ materially from those implied by forward-looking statements. 
Accordingly, in evaluating our business, we encourage you to consider the following discussion of risk factors, in its entirety, in addition to other 
information contained in this Annual Report on Form 10-K and our other public filings with the SEC. The following risk factors may be amended, 
supplemented or superseded from time to time by other reports we file with the SEC in the future. 

In the following discussion of risk factors, References to “we”, “us”, “our” and similar terms refer to the combined business of Synlogic, Inc. after 

the Merger on August 28, 2017.

Summary of Risk Factors

Our business is subject to numerous risks and uncertainties, including those highlighted in this section below, that represent challenges that we face 
in connection with the successful implementation of our strategy. The occurrence of one or more of the events or circumstances described in more detail in 
the risk factors below, alone or in combination with other events or circumstances, may have an adverse effect on our business, cash flows, financial 
condition and results of operations. Such risks include, but are not limited to:

•

•

Our business to date has been almost entirely dependent on the success of SYNB1934, and we have decided to discontinue further development 
of SYNB1934 and devote significant time and resources to identifying and evaluating strategic alternatives, which may not be successful.

If we do not successfully consummate a strategic transaction, our board of directors may decide to pursue a dissolution and liquidation of our 
company. In such an event, the amount of cash available for distribution to our stockholders will depend heavily on the timing of such liquidation 
as well as the amount of cash that will need to be reserved for commitments and contingent liabilities.

• We are a biopharmaceutical company with a history of losses, and we expect to continue to incur losses for the foreseeable future, and we may 

never achieve or maintain profitability. 

• We will require substantial additional funding, which may not be available on acceptable terms, or at all. 

•

•

•

•

•

•

•

•

•

Our quarterly and annual operating results may fluctuate in the future. As a result, we may fail to meet the expectations of research analysts or 
investors, which could cause our stock price to decline. 

Our stock price is volatile, and our stockholders may not be able to resell shares of our common stock at or above the price they paid. 

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

Adverse developments affecting the financial services industry, such as actual events or concerns involving liquidity, defaults or non-
performance by financial institutions or transactional counterparties, could adversely affect our current and projected business operations and its 
financial condition and results of operations.

Clinical trials are costly, time consuming and inherently risky, and we may fail to demonstrate safety and efficacy to the satisfaction of applicable 
regulatory authorities. 

The approach we are taking to discover and develop novel therapeutics using synthetic biology to create novel medicines is unproven and may 
never lead to marketable products. 

Our product candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval, limit the 
commercial viability of an approved label, or result in significant negative consequences following marketing approval, if any. 

Product development involves a lengthy and expensive process with an uncertain outcome, and results of earlier preclinical studies and clinical 
trials may not be predictive of future clinical trial results. 

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

• We may face potential product liability claims, and, if successful claims are brought against us, we may incur substantial liability and costs. If the 

use or misuse of our product candidates harms patients or is perceived to harm patients even when 

37

 
such harm is unrelated to our product candidates, our regulatory approvals, if any, could be revoked or otherwise negatively impacted and we 
could be subject to costly and damaging product liability claims. If we are unable to obtain adequate insurance or are required to pay for 
liabilities resulting from a claim excluded from, or beyond the limits of, our insurance coverage, such liability could adversely affect our 
financial condition. 

A pandemic, epidemic, or outbreak of an infectious disease, such as COVID-19, or geopolitical tensions, such as the armed conflict between 
Russia and Ukraine or the conflict in the Middle East, may materially and adversely affect our business and our financial results.

Even if we obtain regulatory approval for a product candidate, we will remain subject to ongoing regulatory requirements. 

•

•

• We may be subject, directly or indirectly, to federal and state healthcare fraud and abuse laws, false claims laws, and health information privacy 

and security laws. If we are unable to comply, or have not fully complied, with such laws, we could face substantial penalties. 

• We may be subject to, or may in the future become subject to, U.S. federal and state, and foreign laws and regulations imposing obligations on 
how we collect, use, disclose, store and process personal information. Our actual or perceived failure to comply with such obligations could 
result in liability or reputational harm and could harm our business. Ensuring compliance with such laws could also impair our efforts to 
maintain and expand our customer base, and thereby decrease our revenue.

•

•

•

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

Our internal computer systems, or those of our collaborators or other contractors or consultants, may fail or suffer security breaches, which could 
result in a material disruption of our product development programs. 

Ethical, legal and social concerns about synthetic biology and genetic engineering could limit or prevent the use of our technologies and limit our 
revenues. 

• We may not be successful in obtaining or maintaining necessary rights to Synthetic Biotics, product candidates and processes for our 

development pipeline through acquisitions and in-licenses. 

• We may not have sufficient patent term protections for our product candidates to effectively protect our business. 

•

•

If we are unable to maintain effective proprietary rights for our product candidates or any future product candidates, we may not be able to 
compete effectively in our proposed markets. 

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

• We may be involved in lawsuits to protect or enforce our patents or the patents of our licensors, which could be expensive, time consuming, and 

unsuccessful. 

• We may be subject to claims challenging the inventorship of our patents and other intellectual property. 

• We may not be able to protect our intellectual property rights throughout the world. 

• We have historically relied on and may in the future rely, on third parties to conduct some aspects of our product formulation, research, 

preclinical, and clinical studies, and those third parties may not perform satisfactorily, including by failing to meet deadlines for the completion 
of such formulation, research or testing. 

• We have historically relied on and may in the future rely on third-party supply and manufacturing partners for drug supplies for our late-stage 

clinical activities and may do the same for any commercial supplies of our product candidates. 

• We may attempt to form collaborations in the future with respect to our product candidates, but we may not be able to do so, which may cause us 

to alter our development and commercialization plans. 

•

•

If the market opportunities for our product candidates are smaller than we believe they are, we may not meet our revenue expectations and, 
assuming approval of a product candidate, our business may suffer. Because the patient populations in the market for our product candidates may 
be small, we must be able to successfully identify patients and acquire a significant market share to achieve profitability and growth.  

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

38

 
•

•

Provisions of our charter documents or Delaware law could delay or prevent an acquisition of us, even if the acquisition would be beneficial to 
our stockholders and could make it more difficult for you to change management.  

If we fail to comply with the continued listing requirements of the Nasdaq Capital Market, our common stock may be delisted and the price of 
our common stock and our ability to access the capital markets could be negatively impacted.

Risks Related to Our Evaluation of Strategic Alternatives 

Our business to date has been significantly dependent on the success of SYNB1934, and we have decided to discontinue further development of 
SYNB1934 and devote significant time and resources to identifying and evaluating strategic alternatives, which may not be successful.

To date, we have invested significant efforts and financial resources in the research and development of SYNB1934, which was our lead product 

candidate in clinical trials. In February 2024, we voluntarily halted Synpheny-3 based on results of an internal review in advance of an upcoming 
independent Data Monitoring Committee (DMC) assessment, which indicated the trial was unlikely to meet its primary endpoint. The decision was not 
based on concerns regarding safety or tolerability. In February 2024, started to reduce operating expenses while we evaluate our strategic alternatives with a 
goal to enhance stockholder value, including the possibility of a merger or sale of the Company. There can be no assurance that our process to identify and 
evaluate potential strategic alternatives will result in any definitive offer to consummate a strategic transaction, or if made what the terms thereof will be or 
that any transaction will be approved or consummated. If any definitive offer to consummate a strategic transaction is received, there can be no assurance 
that a definitive agreement will be executed or that, if a definitive agreement is executed, the transaction will be consummated. In addition, there can be no 
assurance that any transaction, involving our company and/or assets, that is consummated would enhance shareholder value. There also can be no assurance 
that we will conduct further drug research or development activities in the future.

Any such strategic transaction may require us to incur non-recurring or other charges, may increase our near-and long-term expenditures and may 

pose significant integration challenges or disrupt our management or business, which could adversely affect our operations and financial results. For 
example, these transactions may entail numerous operational and financial risks, including:

•

•

•

•

•

•

•

•

exposure to unknown liabilities;

incurrence of substantial debt or dilutive issuances of equity securities to pay for acquisitions;

higher-than-expected acquisition and integration costs;

write-downs of assets or goodwill or impairment charges;

increased amortization expenses;

difficulty and cost in combining the operations and personnel of any acquired businesses with our operations and personnel;

impairment of relationships with key suppliers or customers of any acquired businesses due to changes in management and ownership; and

inability to retain key employees of our company or any acquired businesses.

If we do not successfully consummate a strategic transaction, our board of directors may decide to pursue a dissolution and liquidation of our 
company. In such an event, the amount of cash available for distribution to our stockholders will depend heavily on the timing of such liquidation as 
well as the amount of cash that will need to be reserved for commitments and contingent liabilities.

There can be no assurance that the process to identify a strategic transaction will result in a successfully consummated transaction. If no transaction 
is completed, our board of directors may decide to pursue a dissolution and liquidation of our company. In such an event, the amount of cash available for 
distribution to our stockholders will depend heavily on the timing of such decision and, ultimately, such liquidation, since the amount of cash available for 
distribution continues to decrease as we fund our operations while we evaluate our strategic alternatives. In addition, if our board of directors were to 
approve and recommend, and our stockholders were to approve, a dissolution and liquidation of our company, we would be required under Delaware 
corporate law to pay our outstanding obligations, as well as to make reasonable provision for contingent and unknown obligations, prior to making any 
distributions in liquidation to our stockholders. Our commitments and contingent liabilities may include (i) obligations under our employment and related 
agreements with certain employees that provide for severance and other payments following a termination of employment occurring for various reasons, 
including a change in control of our company; (ii) potential litigation against us, and other various claims and legal actions arising in the ordinary course of 
business; and (iii) non-cancelable facility lease obligations. As a result of this requirement, a portion of our assets may need to be reserved pending the 
resolution of such obligations. In addition, we may be subject to litigation or other claims related to a dissolution and liquidation of our company. If a 
dissolution and liquidation 

39

 
 
 
 
were pursued, our board of directors, in consultation with its advisors, would need to evaluate these matters and make a determination about a reasonable 
amount to reserve. Accordingly, holders of our common stock could lose all or a significant portion of their investment in the event of a liquidation, 
dissolution or winding up of our company.

Risks Related to Our Financial Condition, Capital Requirements and Operating Results 

We are a biopharmaceutical company with a history of losses, and we expect to continue to incur losses for the foreseeable future, and we may never 
achieve or maintain profitability. 

We are a biopharmaceutical company developing Synthetic Biotics and we have incurred significant operating losses since our inception. Our net 
loss was approximately $57.3 million and $66.1 million for the fiscal years ended December 31, 2023 and 2022, respectively. As of December 31, 2023, 
we had an accumulated deficit of approximately $414.3 million. To date, we have not generated any product revenue. Substantially all of our losses have 
resulted from expenses incurred in connection with our research and development programs and from general and administrative costs associated with our 
operations. We have no products on the market.

We have not generated, and do not expect to generate, any product revenue for the foreseeable future, and we expect to continue to incur significant 
operating losses for the foreseeable future due to the cost of research and development, preclinical studies and clinical trials, the regulatory review process 
for product candidates, and the development of manufacturing and marketing capabilities for any product candidates approved for commercial sale. The 
amount of our potential future losses is uncertain. To achieve profitability, we must successfully develop product candidates, obtain regulatory approvals to 
market and commercialize product candidates, manufacture any approved product candidates on commercially reasonable terms, establish a sales and 
marketing organization or suitable third-party alternatives for any approved product candidates and raise sufficient funds to finance our business activities. 
We may never succeed in these activities and, even if we do, may never generate revenues that are significant or large enough to achieve profitability. Even 
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 our value and could impair our ability to raise capital, maintain our research and development efforts, expand our business or 
continue our operations. A decline in our value could also cause our stockholders to lose all or part of their investment. 

We will require substantial additional funding, which may not be available on acceptable terms, or at all. 

We have used substantial funds to discover and develop our programs and proprietary drug development platform in synthetic biology and will 

require substantial additional funds to conduct further research and development, including preclinical studies and clinical trials of our product candidates, 
seek regulatory approvals for our product candidates and manufacture and market any products that are approved for commercial sale. Our future capital 
requirements and the period for which we expect our existing resources to support our operations may vary significantly from what we expect. Our 
monthly spending levels vary based on new and ongoing research and development and corporate activities. Because we cannot be certain of the length of 
time or activities associated with successful development and commercialization of our product candidates, we are unable to estimate the actual funds we 
will require to develop and commercialize them. 

We do not expect to realize any appreciable revenue from product sales or royalties in the foreseeable future, if at all. Our revenue sources will 

remain very limited unless and until our product candidates complete clinical development and are approved for commercialization and successfully 
marketed or we enter into third-party arrangements with collaborators. To date, we have primarily financed our operations through sales of our securities, 
our third-party collaborations and the Merger. We intend to seek additional funding in the future through collaborations, equity or debt financings, credit or 
loan facilities or a combination of one or more of these financing sources. Our ability to raise additional funds will depend on financial, economic and other 
factors, many of which are beyond our control. Additional funds may not be available to us on acceptable terms or at all. If we raise additional funds by 
issuing equity or convertible debt securities, our stockholders will suffer dilution and the terms of any financing may adversely affect the rights of our 
stockholders. In addition, as a condition to providing additional funds to us, future investors may demand, and may be granted, rights superior to those of 
existing stockholders. Debt financing, if available, may involve restrictive covenants limiting our flexibility in conducting future business activities, and, in 
the event of insolvency, debt holders would be repaid before holders of equity securities received any distribution of corporate assets. 

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

development programs and preclinical studies or clinical trials, if any, limit strategic opportunities or undergo reductions in our workforce or other 
corporate restructuring activities. We also could be required to seek funds through arrangements with collaborators or others that may require us to 
relinquish rights to some of our product candidates or technologies that we would otherwise pursue on our own. 

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Our quarterly and annual operating results may fluctuate in the future. As a result, we may fail to meet the expectations of research analysts or 
investors, which could cause our stock price to decline. 

Our financial condition and operating results may fluctuate from quarter to quarter and year to year in the future due to a variety of factors, many of 

which are beyond our control. Factors relating to our business that may contribute to these fluctuations include the following factors, as well as factors 
described elsewhere in this Annual Report on Form 10-K and others: 

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•

•

•

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•

Our ability to achieve or maintain profitability; 

Our ability to develop and maintain Synthetic Biotic technologies; 

Our ability to manage our growth; 

The outcomes of research programs, clinical trials, or other product development and approval processes; 

Our ability to accurately report our financial results in a timely manner; 

Our dependence on, and the need to attract and retain, key management and other personnel; 

Our ability to obtain, protect and enforce our intellectual property rights; 

Our ability to prevent the theft or misappropriation of our intellectual property, know-how or technologies; 

Our ability to achieve milestones with our collaborators;

Potential advantages that our competitors and potential competitors may have in securing funding or developing competing technologies or 
products;  

Our ability to obtain additional capital that may be necessary to expand our business; and

Other macro-economic factors outside of our control. 

Due to the various factors mentioned above, and others, the results of any prior quarterly or annual periods should not be relied upon as indications 

of our future operating performance. 

Our stock price is volatile, and our stockholders may not be able to resell shares of our common stock at or above the price they paid. 

The trading price of our common stock is highly volatile and could be subject to wide fluctuations in response to various factors, some of which are 

beyond our control, such as reports by industry analysts, investor perceptions, general industry trends, macro-economic conditions, or negative 
announcements by other companies involving similar technologies or diseases. These factors also include those discussed in this “Risk Factors” section of 
this Annual Report on Form 10-K and others such as: 

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•

Announcements relating to collaborations that we may enter into with respect to the development or commercialization of our product 
candidates; 

Announcements relating to the receipt, modification or termination of government contracts or grants; 

Termination or delay of a development program; 

Product liability claims related to our clinical trials or product candidates; 

Prevailing economic conditions; 

Perspectives on synthetic biology and genetic engineering;

Perspectives on the programs of competitors;

Additions or departures of key personnel; 

Business disruptions caused by natural disasters; 

Disputes concerning our intellectual property or other proprietary rights; 

FDA or other U.S. or foreign regulatory actions affecting us or our industry; 

Sales of our common stock by the company, our executive officers and directors or our stockholders in the future; 

Future sales or issuances of equity or debt securities by us; 

Lack of an active, liquid and orderly market in our common stock; 

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•

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Fluctuations in our quarterly operating results; and 

The issuance of new or changed securities analysts’ reports or recommendations regarding us. 

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

experienced extreme volatility that have been often unrelated to the operating performance of the issuer. These broad market fluctuations may adversely 
affect the trading price or liquidity of our common stock. In the past, when the market price of a stock has been volatile, holders of that stock have 
sometimes instituted securities class action litigation against the issuer. If any of our stockholders were to bring such a lawsuit against us, we could incur 
substantial costs defending the lawsuit and the attention of our management would be diverted from the operation of our business. 

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

We are a biopharmaceutical company with a limited operating history. We commenced active operations in 2014. Our operations to date have been 

limited to organizing and staffing our company, research and development activities, business planning and raising capital. In February 2024, we 
voluntarily halted Synpheny-3 based on results of an internal review in advance of an upcoming independent Data Monitoring Committee (DMC) 
assessment, which indicated the trial was unlikely to meet its primary endpoint. The decision was not based on concerns regarding safety or tolerability. We 
have not yet demonstrated our ability to successfully complete large-scale, pivotal clinical trials, obtain marketing approvals, manufacture a commercial-
scale product, or arrange for a third-party to do so on our behalf, or conduct sales and marketing activities necessary for successful product 
commercialization. Typically, it takes many years to develop one new product candidate from the time it is discovered to the time that it becomes available 
for treating patients. We may encounter unforeseen expenses, difficulties, complications, delays and other known and unknown factors that may hinder our 
success in commercializing one or more of our product candidates. Further, drug development is a capital-intensive and highly speculative undertaking that 
involves a substantial degree of risk. You should consider our prospects in light of the costs, uncertainties, delays and difficulties frequently encountered by 
companies in the early stages of development and clinical trials. Any forward-looking statements regarding our future prospects, plans or viability may not 
be as accurate as they may be if we had a longer operating history or a history of successfully developing and commercializing pharmaceutical products. 

Adverse developments affecting the financial services industry, such as actual events or concerns involving liquidity, defaults or non-performance by 
financial institutions or transactional counterparties, could adversely affect our current and projected business operations and its financial condition 
and results of operations.

Actual events involving limited liquidity, defaults, non-performance or other adverse developments that affect financial institutions, transactional 
counterparties or other companies in the financial services industry or the financial services industry generally, or concerns or rumors about any events of 
these kinds or other similar risks, have in the past and may in the future lead to market-wide liquidity problems. For example, on March 10, 2023, Silicon 
Valley Bank (SVB), was closed by the California Department of Financial Protection and Innovation, which appointed the Federal Deposit Insurance 
Corporation (the FDIC) as receiver. Similarly, on March 12, 2023, Signature Bank and Silvergate Capital Corp. were each swept into receivership and on 
May 1, 2023, First Republic Bank was swept into receivership. Although a statement by the Department of the Treasury, the Federal Reserve and the FDIC 
stated that all depositors of SVB would have access to all of their money after only one business day of closure, including funds held in uninsured deposit 
accounts, uncertainty remains over liquidity concerns in the broader financial services industry. Similar impacts have occurred in the past, such as during 
the 2008-2010 financial crisis.   

Inflation and rapid increases in interest rates have led to a decline in the trading value of previously issued government securities with interest rates 
below current market interest rates. Although the U.S. Department of Treasury, FDIC and Federal Reserve Board have announced a program to provide up 
to $25 billion of loans to financial institutions secured by certain of such government securities held by financial institutions to mitigate the risk of potential 
losses on the sale of such instruments, widespread demands for customer withdrawals or other liquidity needs of financial institutions for immediate 
liquidity may exceed the capacity of such program. There is no guarantee that the U.S. Department of Treasury, FDIC and Federal Reserve Board will 
provide access to uninsured funds in the future in the event of the closure of other banks or financial institutions, or that they would do so in a timely 
fashion. 

Although we review our banking relationships as we believe appropriate, our access to funding sources and other credit arrangements in amounts 

adequate to finance or capitalize our current and projected future business operations could be significantly impaired by factors that affect us, the financial 
institutions with which we have arrangements directly, or the financial services industry or economy in general. These factors could include, among others, 
events such as liquidity constraints or failures, the ability to perform obligations under various types of financial, credit or liquidity agreements or 
arrangements, disruptions or instability in the financial services industry or financial markets, or concerns or negative expectations about the prospects for 
companies in the financial services industry. These factors could involve financial institutions or financial services industry companies with which we 

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have financial or business relationships, but could also include factors involving financial markets or the financial services industry generally. 

The results of events or concerns that involve one or more of these factors could include a variety of material and adverse impacts on our current and 

projected business operations and our financial condition and results of operations. These could include, but may not be limited to, the following:

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•

•

delayed access to deposits or other financial assets or the uninsured loss of deposits or other financial assets; 

loss of access to working capital sources; 

potential or actual breach of contractual obligations that require us to maintain letters or credit or other credit support arrangements; or 

termination of cash management arrangements and/or delays in accessing or actual loss of funds subject to cash management arrangements. 

In addition, investor concerns regarding the U.S. or international financial systems could result in less favorable commercial financing terms, 
including higher interest rates or costs and tighter financial and operating covenants, or systemic limitations on access to credit and liquidity sources, 
thereby making it more difficult for us to acquire financing on acceptable terms or at all. Any decline in available funding or access to our cash and 
liquidity resources could, among other risks, adversely impact our ability to meet our operating expenses, financial obligations or fulfill our other 
obligations, result in breaches of our financial and/or contractual obligations or result in violations of federal or state wage and hour laws. Any of these 
impacts, or any other impacts resulting from the factors described above or other related or similar factors not described above, could have material adverse 
impacts on our liquidity and our current and/or projected business operations and financial condition and results of operations. 

In addition, any further deterioration in the macroeconomic economy or financial services industry could lead to losses or defaults by parties with 

whom we conduct business, which in turn, could have a material adverse effect on our current and/or projected business operations and results of 
operations and financial condition. 

Risks Related to the Development of Our Product Candidates 

Clinical trials are costly, time consuming and inherently risky, and we may fail to demonstrate safety and efficacy to the satisfaction of applicable 
regulatory authorities. 

Clinical development of a product candidate is expensive, time consuming and involves significant risk. We cannot guarantee that any clinical trials 

we undertake to conduct will be conducted as planned or completed on schedule or at all. A failure of one or more clinical trials can occur at any stage of 
development. For example, in February 2024, we voluntarily halted Synpheny-3 based on results of an internal review in advance of an upcoming 
independent DMC assessment, which indicated the trial was unlikely to meet its primary endpoint. The decision was not based on concerns regarding 
safety or tolerability. Events that may prevent successful or timely completion of clinical development of our product candidates include but are not limited 
to: 

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Inability to generate satisfactory preclinical or other nonclinical data, including, toxicology, or other in vivo or in vitro data or 
diagnostics to support the initiation or continuation of clinical trials; 

Delays in reaching agreement on acceptable terms with CROs and clinical trial sites, the terms of which can be subject to extensive 
negotiation and may vary significantly among different CROs and clinical trial sites; 

Delays in obtaining required institutional review board approval at each clinical trial site; 

Failure to permit the conduct of a clinical trial by regulatory authorities, after review of an investigational new drug or equivalent 
foreign application or amendment; 

Delays in recruiting qualified patients in our clinical trials; 

Failure by clinical sites or CROs or other third parties to adhere to clinical trial requirements; 

Failure by us, clinical sites, CROs or other third parties to perform in accordance with the good clinical practices requirements of the 
FDA or applicable foreign regulatory guidelines; 

Patients dropping out of the clinical trials; 

Occurrence of adverse events, unacceptable side effects or toxicity issues associated with our product candidates; 

Imposition by the FDA of a clinical hold or the requirement by other similar regulatory agencies that one or more clinical trials be 
delayed or halted; 

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•

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•

•

Changes in regulatory requirements and guidance that require amending or submitting new clinical protocols or performing additional 
nonclinical studies; 

The ultimate affordability of the cost of clinical trials of our product candidates; 

Negative or inconclusive results from our clinical trials that may result in us deciding, or regulators requiring us, to conduct additional 
clinical trials or abandon such clinical trials and/or clinical trials or development programs in other ongoing or planned indications for 
a product candidate; and 

Delays in identifying or reaching agreement on acceptable terms with third-party manufacturers, delays in developing and transferring 
a reproducible, scalable manufacturing process, or delays or failure in manufacturing sufficient quantities of our product candidates 
for use in clinical trials. 

Any inability to successfully complete clinical development and obtain regulatory approval for our product candidates could result in additional 
costs to us or impair our ability to raise additional capital or generate revenue. In addition, if we make manufacturing or formulation changes to our product 
candidates, we may need to conduct additional nonclinical studies and/or clinical trials, the results obtained from such new formulation may not be 
consistent with previous results obtained, or the regulatory authorities may need to further review and approve our process before we can proceed. Clinical 
trial delays could also shorten any anticipated periods of patent exclusivity for our product candidates and may allow competitors to develop and bring 
products to market before we do which could impair our ability to successfully commercialize our product candidates and may harm our business and 
results of operations. 

The approach we are taking to discover and develop novel therapeutics using synthetic biology to create novel medicines is unproven and may never 
lead to marketable products. 

The scientific discoveries that form the basis for our efforts to generate and develop our product candidates are relatively recent. The scientific 

evidence to support the feasibility of developing drugs based on our approach is both preliminary and limited. Synthetic Biotics represent a novel 
therapeutic modality and their successful development by us may require additional studies and efforts to optimize their therapeutic potential. Any product 
candidates that we develop may not demonstrate in patients the therapeutic properties ascribed to them in laboratory and other preclinical studies, and they 
may interact with human biological systems in unforeseen, ineffective or even harmful ways. We have also not yet succeeded and may never succeed in 
demonstrating efficacy and safety for our current or any future product candidates in a pivotal clinical trial. If we are not able to successfully develop and 
commercialize product candidates based upon this technological approach, we may never become profitable, and the value of our capital stock may decline. 
Additionally, the FDA or other regulatory authorities may lack experience in evaluating the safety and efficacy of novel product candidates based on 
synthetic biology, which could result in a longer than expected regulatory review process, increase our expected development costs and delay or prevent 
commercialization of our product candidates.

Our Synthetic Biotic product candidates are based on a relatively novel technology, which makes it difficult to predict the time and cost of development 
and of subsequently obtaining regulatory approval, if at all. 

We have concentrated our research and development efforts to date on a limited number of product candidates based on our Synthetic Biotic 
therapeutic platform. Our future success depends on our successful development of viable product candidates. There can be no assurance that we will not 
experience problems or delays in developing our product candidates and that such problems or delays will not cause unanticipated costs, or that any such 
development problems can be solved. For example, in February 2024, we voluntarily halted Synpheny-3 based on results of an internal review in advance 
of an upcoming independent DMC assessment, which indicated the trial was unlikely to meet its primary endpoint. The decision was not based on concerns 
regarding safety or tolerability.

The clinical trial and manufacturing requirements of the FDA, 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 the 
product candidate. The regulatory approval process for novel product candidates such as Synthetic Biotics may be more expensive and take longer than for 
other, better known or more extensively studied therapeutic modalities. It is difficult to determine how long it will take or how much it will cost to obtain 
regulatory approvals for our product candidates in either the United States or the European Union or how long it will take to commercialize our product 
candidates, even if approved for marketing. Approvals by the EMA or national regulatory agencies may not be indicative of what the FDA, and vice versa, 
may require for approval and different or additional nonclinical studies or clinical trials may be required to support regulatory approval in each respective 
jurisdiction. Delay or failure to obtain, or unexpected costs in obtaining, the regulatory approval necessary to bring a potential product candidate to market 
could decrease our ability to generate sufficient product revenue, and our business, financial condition, results of operations and prospects may be harmed. 

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We may not be successful in our efforts to use and expand our development platform to build a pipeline of product candidates. 

A key element of our strategy is to create Synthetic Biotics that can be deployed against a broad range of human diseases in order to build a pipeline 
of product candidates. Although our research and development efforts to date have resulted in potential product candidates, we may not be able to continue 
to identify and develop additional product candidates. Even if we are successful in continuing to build our pipeline, the potential product candidates that we 
identify may not be suitable for clinical development. For example, these potential product candidates may be shown to have harmful side effects or other 
characteristics that indicate that they are unlikely to be drugs that will receive marketing approval and achieve market acceptance. If we do not successfully 
develop and commercialize product candidates based upon our approach, we will not be able to obtain product revenue in future periods, which likely 
would result in significant harm to our financial position. There is no assurance that we will be successful in our preclinical and clinical development, and 
the process of obtaining regulatory approvals will, in any event, require the expenditure of substantial time and financial resources. 

Our product candidates may cause undesirable side effects or have other properties that could delay or prevent their regulatory approval, limit the 
commercial viability of an approved label, or result in significant negative consequences following marketing approval, if any. 

Undesirable side effects caused by our product candidates could cause us or regulatory authorities to interrupt, delay or terminate our clinical trials 
or result in a restrictive label or delay regulatory approval by the FDA or comparable foreign authorities. Undesirable side effects and negative results for 
other indications may negatively impact the development and potential for approval of our product candidates for their proposed indications. 

Additionally, even if one or more of our product candidates receives marketing approval, and we or others later identify undesirable side effects 

caused by such products, potentially significant negative consequences could result, including but not limited to: 

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•

Regulatory authorities may withdraw approvals of or revoke licenses for such products; 

Regulatory authorities may require additional warnings on the labels of such products; 

We may be required to create a REMS plan, which could include a medication guide outlining the risks of such side effects for 
distribution to patients, a communication plan for healthcare providers, and/or other elements to assure safe use; 

We may be required to conduct additional clinical trials or costly post-marketing testing and surveillance to monitor the safety of the 
product;

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

Our reputation may suffer. 

Any of these events could prevent us from achieving or maintaining market acceptance of a product candidate, even if approved, and could 

significantly harm our business, results of operations, and prospects. 

Our product development program may not uncover all possible adverse events that patients who take our product candidates may experience. The 
number of subjects exposed to our product candidates during clinical trials and the average exposure time in the clinical development program may be 
inadequate to detect rare adverse events, or chance findings, that may only be detected once the product is administered to more patients and for 
greater periods of time. 

Clinical trials by their nature use a sample of the potential patient population. However, with a limited number of patients and limited duration of 

exposure, we cannot be fully assured that uncommon or severe side effects of our product candidates will be uncovered. Such side effects may only be 
uncovered with a significantly larger number of patients exposed to the drug. If such safety problems occur or are identified after a product candidate 
reaches the market, the FDA may require that we amend the labeling of the product or recall the product or may even withdraw approval for the product. 
Any of these events could prevent us from achieving or maintaining market acceptance of a product candidate, even if approved, and could significantly 
harm our business, results of operations, and prospects. 

If we fail to obtain or maintain orphan drug exclusivity for some of our products, our competitors may obtain approval to sell competing drugs to treat 
the same conditions and our revenues will be reduced. 

As part of our business strategy, we have developed and may in the future develop product candidates that may be eligible for FDA and European 

Commission orphan drug designation. In May 2023, the FDA granted orphan drug designation to labafenogene 

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marselecobac (SYNB1934) for the treatment of PKU. Under the Orphan Drug Act, the FDA may designate a product as an orphan drug if it is intended to 
treat, diagnose or prevent rare diseases or conditions that affect fewer than 200,000 people in the United States. In the EU, orphan drug designation may be 
granted to drugs intended to treat, diagnose or prevent a life-threatening or chronically debilitating disease having a prevalence of no more than five in 
10,000 people in the EU. The company that first obtains FDA approval for a designated orphan drug for the associated rare disease receives marketing 
exclusivity for use of that drug for the stated condition for a period of seven years. Orphan drug exclusive marketing rights may be lost under several 
circumstances, including a later determination by the FDA that the request for designation was materially defective or if the manufacturer is unable to 
assure sufficient quantity of the drug. Similar regulations are in effect in the EU with a ten-year period of market exclusivity. 

Because the extent and scope of patent protection for some of our product candidates may be limited, obtaining orphan drug exclusivity is especially 
important for any product candidates that may be eligible for orphan drug designation. For eligible products, we plan to rely on the exclusivity period under 
the Orphan Drug Act to maintain a competitive position. If we do not obtain orphan drug designation for our product candidates that do not have broad 
patent protection, our competitors may then seek to sell a competing drug to treat the same condition and our revenues, if any, may be adversely affected 
thereby. 

Even though we have obtained orphan drug designation for some of our product candidates and intend to seek orphan drug designation for other 

product candidates, there is no assurance that we will be the first to obtain marketing approval for any particular orphan indication. Further, even though we 
have obtained orphan drug designation for certain of our product candidates, or even if we obtain orphan drug designation for other potential product 
candidates, and obtain approval for such products, orphan product exclusivity may not effectively protect us from competition because different drugs can 
be approved for the same condition and the same drug can be approved for different conditions and potentially used off-label in the orphan indication. In 
addition, after an orphan drug is approved, the FDA can subsequently approve a competing drug for the same condition for several reasons, including, if 
the FDA concludes that the later drug is safer or more effective or makes a major contribution to patient care. Orphan drug designation neither shortens the 
development time or regulatory review time of a drug, nor gives the drug any advantage in the regulatory review or approval process. 

We may seek a Rare Pediatric Disease Designation, or RPDD, for one or more of our product candidates. However, a BLA for one or more of our 
product candidates may not meet the eligibility criteria for a priority review voucher upon approval.

In January 2023, labafenogene marselecobac received Rare Pediatric Drug Designation (RPDD) for phenylketonuria and in December 2022, 
SYNB1353 received RPDD for homocystinuria. 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. The FDA may 
also revoke any priority review voucher if the rare pediatric disease drug for which the voucher was awarded is not marketed in the U.S. within one year 
following the date of approval.

For the purposes of this program, a “rare pediatric disease” is a (a) serious or life-threatening disease in which the serious or life-threatening 
manifestations primarily affect individuals aged from birth to 18 years, including age groups often called neonates, infants, children, and adolescents; and 
(b) rare disease or conditions within the meaning of the Orphan Drug Act. The FDA may determine that a BLA for one or more of our product candidates 
does not meet the eligibility criteria for a priority review voucher upon approval. Moreover, due to the current statutory authority for the RPDD and 
voucher program, the FDA may not award the voucher to sponsors of marketing applications unless either (i) the drug has received rare pediatric disease 
designation as of September 30, 2024, and is then approved by the FDA no later than September 30, 2026; or (ii) Congress reauthorizes the program. Even 
if legislation is enacted that extends the date by which approval of the rare pediatric disease-designated drug must obtain approval to receive a priority 
review voucher, we may not obtain approval by that date, and even if we do, we may not obtain a priority review voucher.

Product development involves a lengthy and expensive process with an uncertain outcome, and results of earlier preclinical studies and clinical trials 
may not be predictive of future clinical trial results. 

The results from preclinical studies or early clinical trials of a product candidate may not predict the results that will be obtained in subsequent 
subjects or in later stage clinical trials of that product candidate or any other product candidate. Flaws in the design of a clinical trial may not become 
apparent until the clinical trial is well advanced. We have limited experience in designing clinical trials and we may be unable to design and execute 
clinical trials to support regulatory approval of our product candidates. In addition, preclinical study and clinical trial data are often susceptible to varying 
interpretations and analyses, and many companies that believed their product candidates performed satisfactorily in preclinical studies and clinical trials 
nonetheless failed to obtain regulatory authority approval. Product candidates that seemingly perform satisfactorily in preclinical studies and clinical trials 
may nonetheless 

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fail to obtain regulatory approval. There is a high failure rate for drugs proceeding through clinical trials. Many companies in the pharmaceutical and 
biotechnology industries have suffered significant setbacks in clinical development even after achieving promising results in earlier studies. These setbacks 
have been caused by, among other things, preclinical findings made while clinical trials were underway, or safety or efficacy observations made in 
preclinical studies and clinical trials, including previously unreported adverse events. Any such setbacks in our clinical development could negatively affect 
our business and operating results. 

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

Clinical trials of a new product candidate require the enrollment of a sufficient number of healthy volunteers or patients suffering from the disease or 

condition the product candidate is intended to treat and who meet other eligibility criteria. The timing of our clinical trials depends on our ability to recruit 
eligible subjects to participate as well as the completion of required follow-up evaluations. Patients and healthy volunteers may be unwilling to participate 
in our clinical trials because of negative publicity from adverse events related to novel therapeutic approaches, competitive clinical trials for similar patient 
populations, the existence of current treatments or for other reasons including due to concerns posed by local or global health emergencies. Rates of patient 
enrollment are affected by many factors, including the size of the potential patient population, the age and condition of the patients, the stage and severity 
of disease or condition, the nature and requirements of the protocol, the proximity of patients to clinical sites, the availability of effective treatments for the 
relevant disease or condition, the perceived risks, the clinical trial administration practices of the contract research organization (CRO), or clinical trial 
sites, labor shortages at the CRO or clinical trial sites, benefits and convenience of administration of the product candidate being studied, the patient referral 
practices of physicians, the amount of attention provided to our trial by clinical trial sites, our efforts and the CRO efforts, our efforts to facilitate timely 
enrollment in clinical trials, and the eligibility criteria for the clinical trial. Delays or difficulties in patient enrollment or difficulties retaining trial 
participants, including as a result of the availability of existing or other investigational treatments, can result in increased costs, longer development times 
or termination of a clinical trial. 

In addition, our success may depend, in part, on our ability to identify patients who qualify for our clinical trials or are likely to benefit from any 

product candidate that we may develop, which will require those potential patients to undergo a screening assay for the presence or absence of a particular 
genetic sequence or clinical trait. Genetically defined diseases generally, and especially those for which our current product candidates are targeted, may 
have relatively low prevalence. If we, or any third parties that we engage to assist us, are unable to successfully identify patients with these diseases, or 
experience delays in doing so, then we may not realize the full commercial potential of any product candidate we develop. 

Congress also recently amended the FDCA to require sponsors of a Phase 3 clinical trial, or other “pivotal study” of a new drug or biologic to 

support marketing authorization, to design and submit a diversity action plan for such clinical trial. The action plan must describe appropriate diversity 
goals for enrollment, as well as a rationale for the goals and a description of how the sponsor will meet them. For any future Phase 3 trials we plan to 
conduct, we must submit a diversity action plan to the FDA by the time we submit plans for such Phase 3, or pivotal study, protocol to the agency for 
review as part of an IND, unless we are able to obtain a waiver for some or all of the requirements for a diversity action plan. It is unknown at this time 
how the diversity action plan may affect the planning and timing of any future Phase 3 trial for our product candidates or what specific information FDA 
will expect in such plans. However, initiation of such trials may be delayed if the FDA objects to our proposed diversity action plans for any future Phase 3 
trial for our product candidates, and we may experience difficulties recruiting a diverse population of patients in attempting to fulfill the requirements of 
any approved diversity action plan.

Interim “ top-line” and preliminary data from our clinical trials that we announce or publish from time to time may change as more patient data 
become available and are subject to audit and verification procedures that could result in material changes in final data.

From time to time, we may publicly disclose interim, top-line or preliminary data from our nonclinical studies and clinical trials, which is based on a 

preliminary analysis of then-available data, and the results and related findings and conclusions are subject to change following a more comprehensive 
review of the data related to the particular study or 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 and carefully evaluate all data. As a result, the top-line or preliminary results that we 
report may differ from future results of the same studies, or different conclusions or considerations may qualify such results once additional data have been 
received and fully evaluated. Top-line or preliminary data also remain subject to audit and verification procedures that may result in the final data being 
materially different from the top-line or preliminary data that we previously published. As a result, top-line and preliminary data should be viewed with 
caution until final data are available. Adverse differences between interim data and final data could significantly harm our business prospects. For example, 
in February 2024, we voluntarily halted Synpheny-3 based on results of an internal review in advance of an upcoming independent DMC assessment, 
which indicated the trial was unlikely to meet its primary endpoint. The decision was not based on concerns regarding safety or tolerability. Further, 
disclosure of interim data by us or by our competitors could result in volatility in the price of our common stock. 

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Further, others, including regulatory authorities, may not accept or agree with our assumptions, estimates, calculations, conclusions or analyses or 
may interpret or weigh the importance of data differently, which could impact the value of the particular program, the approvability or commercialization 
of the particular product candidate or product and our company in general. In addition, the information we choose to publicly disclose regarding a 
particular study or clinical trial is based on what is typically extensive information, and you or others may not agree with what we determine is material or 
otherwise appropriate information to include in our disclosure. 

If the interim, top-line or preliminary data that we report differ from actual results, or if others, including regulatory authorities, disagree with the 

conclusions reached, our ability to obtain approval for, and commercialize, our product candidates may be harmed, which could harm our business, 
operating results, prospects or financial condition.

We may face potential product liability claims, and, if successful claims are brought against us, we may incur substantial liability and costs. If the use 
or misuse of our product candidates harms patients or is perceived to harm patients even when such harm is unrelated to our product candidates, our 
regulatory approvals, if any, could be revoked or otherwise negatively impacted and we could be subject to costly and damaging product liability claims. 
If we are unable to obtain adequate insurance or are required to pay for liabilities resulting from a claim excluded from, or beyond the limits of, our 
insurance coverage, such liability could adversely affect our financial condition. 

The use or misuse of our product candidates in clinical trials and the sale of any products for which we may obtain marketing approval exposes us to 

the risk of potential product liability claims. Product liability claims might be brought against us by consumers, healthcare providers, pharmaceutical 
companies or others selling or otherwise coming into contact with our product candidates and approved products, if any. There is a risk that our product 
candidates may induce adverse events. If we cannot successfully defend against product liability claims, we could incur substantial liability and costs. 
Patients with the diseases targeted by our product candidates may already be in severe and advanced stages of disease and have both known and unknown 
significant pre-existing and potentially life-threatening health risks. During the course of treatment, patients may suffer adverse events, including death, for 
reasons that may be related to our product candidates. Such events could subject us to costly litigation, require us to pay substantial amounts of money to 
injured patients, delay, negatively impact or end our opportunity to receive or maintain regulatory approval to market our products, or require us to suspend 
or abandon our commercialization efforts. Even in a circumstance in which an adverse event is unrelated to our product candidates, the investigation into 
the circumstance may be time-consuming or inconclusive. These investigations may delay our regulatory approval process or impact and limit the type of 
regulatory approvals our product candidates receive or maintain. As a result of these factors, a product liability claim, even if successfully defended, could 
have a material adverse effect on our business, financial condition or results of operations. 

Although we have product liability insurance, which covers any clinical trial we may conduct in the United States or internationally, our insurance 

may be insufficient to reimburse us for any expenses or losses we may suffer. We will also likely be required to increase our product liability insurance 
coverage for the advanced clinical trials that we plan to initiate. If we obtain marketing approval for any of our product candidates, we will need to expand 
our insurance coverage to include the sale of commercial products. There is no way to know if we will be able to continue to obtain product liability 
coverage and obtain expanded coverage we may require, in sufficient amounts to protect us against losses due to liability, on acceptable terms, or at all. We 
may not have sufficient resources to pay for any liabilities resulting from a claim excluded from, or beyond the limits of, our insurance coverage. Where we 
have provided indemnities in favor of third parties under our agreements with them, there is also a risk that these third parties could incur liability and bring 
a claim under such indemnities. An individual may bring a product liability claim against us alleging that one of our product candidates or products causes, 
or is claimed to have caused, an injury or is found to be unsuitable for consumer use. Any such product liability claims may include allegations of defects 
in manufacturing, defects in design, a failure to warn of dangers inherent in the product, negligence, strict liability, and a breach of warranties. Claims could 
also be asserted under state consumer protection acts. Any product liability claim brought against us, with or without merit, could result in: 

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Withdrawal of clinical trial volunteers, investigators, patients or trial sites or limitations on approved indications; 

The inability to commercialize, or if commercialized, decreased demand for, our product candidates; 

If commercialized, product recalls, withdrawals of labeling, marketing or promotional restrictions or the need for product 
modification; 

Initiation of investigations by regulators; 

Loss of revenues; 

Substantial costs of litigation, including monetary awards to patients or other claimants; 

Liabilities that substantially exceed our product liability insurance, which we would then be required to pay ourselves; 

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An increase in our product liability insurance rates or the inability to maintain insurance coverage in the future on acceptable terms, if 
at all; 

The diversion of management’s attention from our business; 

Loss of key employees; and  

Damage to our reputation and the reputation of our products and our technology. 

Product liability claims may subject us to the foregoing and other risks, which could have a material adverse effect on our business, financial 

condition or results of operations. 

We or the third parties upon which we depend may be adversely affected by natural disasters and our business continuity and disaster recovery plans 
may not adequately protect us from a serious disaster.

Natural disasters could severely disrupt our operations and have a material adverse effect on our business, results of operations, financial condition 
and prospects. If a natural disaster, power outage or other event occurred that prevented us from using all or a significant portion of our headquarters, that 
damaged critical infrastructure, such as the manufacturing facilities of our third-party contract manufacturers, or that otherwise disrupted operations, it may 
be difficult or, in certain cases, impossible for us to continue our business for a substantial period of time. The disaster recovery and business continuity 
plans we have in place may prove inadequate in the event of a serious disaster or similar event. We may incur substantial expenses as a result of the limited 
nature of our disaster recovery and business continuity plans, which could have a material adverse effect on our business.

A pandemic, epidemic, or outbreak of an infectious disease, such as COVID-19, or geopolitical tensions, such as the armed conflict, between Russia 
and Ukraine or the conflict in the Middle East, may materially and adversely affect our business and our financial results.

Over the past several years, COVID-19 has affected segments of the global economy and it may materially affect our operations again, including 
potentially significant interruption of our clinical trial activities. In addition, there could be a continuing effect of COVID-19 to the business at FDA or 
other health authorities, which could result in delays of reviews and approvals, including with respect to our product candidates.  The COVID-19 
pandemic, including surges in cases could also have a material adverse effect on our clinical trial operations in the United States and elsewhere, including 
our ability to recruit and retain patients and principal investigators and site staff who, as healthcare providers, may have heightened exposure to COVID-19 
if an outbreak occurs in their geography.

COVID-19 may also affect employees of third-party contract research organizations and contract manufacturing organizations located in affected 

geographies that we rely upon to carry out our clinical trials. 

 While the potential economic impact brought by and the duration of COVID-19 may be difficult to assess or predict, a widespread pandemic could 
result in significant disruption of global financial markets, potentially reducing our ability to access capital, which could in the future negatively affect our 
liquidity. Similarly, the current conflicts between Ukraine and Russia and in the Middle East have created extreme volatility in the global capital markets 
and is expected to have further global economic consequences, including disruptions of the global supply chain and energy markets. In addition, we have 
previously announced our intention to open a clinical trial site in Israel and this could be impacted by the events in the Middle East. A recession or market 
correction resulting from the continued spread of COVID-19 or the geopolitical tensions in Russia and Ukraine and in the Middle East, could materially 
affect our business and the price of our common stock.

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

The regulatory approval processes of the FDA and other comparable foreign regulatory authorities are lengthy, time consuming and inherently 
unpredictable, and if we are ultimately unable to obtain regulatory approval for our product candidates, our business will be substantially harmed. 

The time required to obtain marketing approval for a novel therapeutic product from the FDA and other comparable foreign regulatory authorities is 

unpredictable but typically takes many years following the commencement of clinical trials and depends upon numerous factors, including the substantial 
discretion of the regulatory authorities. In addition, approval policies, laws or regulations, or the type and amount of clinical data necessary to gain 
approval may change during the course of a product candidate’s clinical development and may vary among jurisdictions. We have not obtained regulatory 
approval for commercialization of any product candidate and it is possible that none of our existing product candidates or any product candidates we may 
seek to develop in the future will ever obtain that approval. 

Our product candidates could fail to receive regulatory approval for many reasons, including the following: 

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The FDA or comparable foreign regulatory authorities may disagree with the design or implementation of our clinical trials; 

We may be unable to demonstrate to the satisfaction of the FDA or other comparable foreign regulatory authorities that our product 
candidates are safe, pure and potent or effective for their proposed indications; 

The results of clinical trials may not meet the level of statistical significance required by the FDA or other comparable foreign 
regulatory authorities in order to support approval; 

We may be unable to demonstrate that a product candidate’s clinical and other benefits outweigh its safety risks; 

The FDA or other comparable foreign regulatory authorities may disagree with our interpretation of data from preclinical studies or 
clinical trials; 

The data collected from clinical trials of our product candidates may not be sufficient to support the submission of a BLA, to the FDA 
or other equivalent marketing authorization application submissions to obtain regulatory approval in the United States or elsewhere; 

Upon review of our clinical trial sites and data, the FDA or comparable foreign regulatory authorities may find our record keeping or 
the record keeping of our clinical trial sites or investigators to be inadequate; 

The FDA or other comparable foreign regulatory authorities may find deficiencies with or fail to approve the manufacturing processes 
or facilities of third-party manufacturers with which we contract for clinical and commercial supplies; and 

The approval policies or regulations of the FDA or other comparable foreign regulatory authorities or the laws they enforce may 
significantly change in a manner rendering our clinical data insufficient for approval. 

This lengthy approval process as well as the unpredictability of future clinical trial results may result in our failing to obtain regulatory approval to 

market any of our product candidates, which would significantly harm our business, financial condition and results of operations. The FDA and other 
comparable foreign regulatory authorities have substantial discretion in the approval process and determining when or whether to grant regulatory approval 
will be obtained for any of our product candidates, and whether to impose any conditions on such marketing approvals as described below. Even if we 
believe the data collected from clinical trials of our product candidates are promising, such data may not be sufficient to support approval by the FDA or 
other comparable foreign regulatory authorities. 

In addition, even if we were to obtain approval, regulatory authorities may approve any of our product candidates for fewer or more limited 
indications than we request, if any, they may grant approval contingent on the performance of costly post-marketing clinical trials, or they may approve a 
product candidate with a label that does not include the labeling claims necessary or desirable for the successful commercialization of that product 
candidate or with restrictive risk mitigation measures or warning language or contraindications that make the approved product more difficult or costly to 
commercialize. Any of the foregoing scenarios could materially harm the commercial prospects for our product candidates. 

The regulatory landscape related to clinical trials in the European Union (EU) recently evolved. The EU Clinical Trials Regulation (CTR) which 

was adopted in April 2014 and repeals the EU Clinical Trials Directive, became applicable on January 31, 2022. The CTR introduced a centralized process 
and only requires the submission of a single application to all member states concerned the competent authority and an ethics committee in each member 
state, leading to a single decision per member state. The assessment procedure of the CTA has been harmonized as well, including a joint assessment by all 
member states concerned, and a separate assessment by each member state with respect to specific requirements related to its own territory, including ethics 
rules. Each member state’s decision is communicated to the sponsor via the centralized EU portal or CTIS. Once the CTA is approved, clinical study 
development may proceed. The extent to which ongoing and new clinical trials will be governed by the CTR varies. Clinical trials for which an application 
was submitted (i) prior to January 31, 2022 under the Clinical Trials Directive, which the CTR replaced, or (ii) between January 31, 2022 and January 31, 
2023 and for which the sponsor has opted for the application of the Clinical Trials Directive remain governed by said Directive until January 31, 2025. 
After this date, all clinical trials, including those that are ongoing, will become subject to the provisions of the CTR. Compliance with the CTR 
requirements by us, our collaborators and third-party service providers, such as CROs, may impact our development plans.

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This lengthy approval process, as well as the unpredictability of the results of clinical trials, may result in our failing to obtain regulatory approval to 

market any of our product candidates, which would significantly harm our business, results of operations and prospects.

We may seek 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, and it does not increase the likelihood that our 
product candidates will receive marketing approval. 

We may seek a breakthrough therapy designation from the FDA for some of our product candidates. A breakthrough therapy is defined as a drug or 
biological product that is intended, alone or in combination with one or more other drugs, to treat a serious or life-threatening disease or condition, and for 
which preliminary clinical evidence indicates that the drug or biological product may demonstrate substantial improvement over existing therapies on one 
or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. For drugs or biological products 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. A drug or biologic designated as breakthrough therapies by the FDA could also be eligible for accelerated approval. 

Designation as a breakthrough therapy is within the discretion of the FDA. Accordingly, even if we believe one of our product candidates meets the 
criteria for designation as a breakthrough therapy, the FDA may disagree and instead determine not to grant such designation. In any event, the receipt of a 
breakthrough therapy designation for a product candidate may not result in a faster development process, review or approval compared to 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 and are designated as breakthrough therapies, the FDA may later decide that the drugs or biological products no longer meet the 
conditions for designation and the designation may be rescinded. 

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

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

medical need for the condition, a product sponsor may apply for Fast Track designation. We were awarded fFast tTrack designation for SYNB1618 (an 
earlier generation of SYNB1934labafenogene marselecobac) in April 2018, for labofenogene marselecobac in July 2023, and for SYNB1353 in August 
2022. Fast track designation does not ensure that we will receive marketing approval for the product candidate 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. Fast track designation alone does not guarantee qualification for the FDA’s priority review procedures. 

Even if we obtain regulatory approval for a product candidate, we will remain subject to ongoing regulatory requirements. 

If any of our product candidates are approved for marketing, we will be subject to ongoing regulatory requirements, including with respect to 
manufacturing, labeling, packaging, storage, advertising, promotion, sampling, record-keeping, conduct of post-marketing clinical trials, and submission of 
safety, efficacy and other post-approval information, including both federal and state requirements in the United States and requirements of comparable 
foreign regulatory authorities. 

Manufacturers and manufacturers’ facilities are required to continuously comply with FDA and comparable foreign regulatory authority 

requirements, including ensuring that quality control and manufacturing procedures conform to current good manufacturing practices (cGMP) regulations 
and corresponding foreign regulatory manufacturing requirements. As such, we and our contract manufacturers will be subject to continual review and 
inspections to assess compliance with cGMP and adherence to commitments made in any BLA or marketing authorization application. 

Any regulatory approvals that we receive for our product candidates may be subject to limitations on the approved indicated uses for which the 

product candidate may be marketed or to the conditions of approval, or contain requirements for potentially costly post-marketing testing, including Phase 
4 clinical trials, and surveillance to monitor the safety and efficacy of the product candidate. We will be required to report adverse reactions and production 
problems, if any, to the FDA and comparable foreign regulatory authorities. Any new legislation addressing drug safety issues could result in delays in 
product development or commercialization, or increased costs to ensure compliance. If our original marketing approval for a product candidate were 
obtained through an accelerated approval pathway, we could be required to conduct a successful post-marketing clinical trial in order to confirm the clinical 
benefit for our products. An unsuccessful post-marketing clinical trial or failure to complete such a trial could result in the withdrawal of marketing 
approval. 

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If a regulatory agency discovers 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, or disagrees with the promotion, marketing or labeling of a product, the regulatory agency 
may impose restrictions on that product or us, including requiring withdrawal of the product from the market. If we fail to comply with applicable 
regulatory requirements, a regulatory agency or enforcement authority may, among other things: 

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Issue untitled or warning letters; 

Impose civil or criminal penalties; 

Suspend or withdraw regulatory approval or revoke a license; 

Suspend any of our ongoing clinical trials; 

Refuse to approve pending applications or supplements to approved applications submitted by us; 

Impose restrictions on our operations, including closing our contract manufacturers’ facilities; or 

Require a product recall. 

Any government investigation of alleged violations of law would be expected to require us to expend significant time and resources in response and 
could generate adverse publicity. Any failure to comply with ongoing regulatory requirements may significantly and adversely affect our ability to develop 
and commercialize our products and our value and operating results would be adversely affected. 

Obtaining and maintaining marketing approval of our current and future product candidates in one jurisdiction does not mean that we will be 
successful in obtaining marketing approval of our current and future therapeutic product candidates in other jurisdictions. 

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

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

The FDA and other comparable ex-U.S. regulatory authorities may not accept data from trials conducted in locations outside of their jurisdiction.

We may choose to conduct international clinical trials in the future. The acceptance of study data by the FDA or other comparable ex-U.S. 
regulatory authority from clinical trials conducted outside of their respective jurisdictions may be subject to certain conditions. The acceptance of study 
data from clinical trials conducted outside the United States or another jurisdiction by the FDA or comparable ex-U.S. regulatory authority may be subject 
to certain conditions or may not be accepted at all. In cases where data from ex-U.S. clinical trials are intended to serve as the sole basis for marketing 
approval in the United States, the FDA will generally not approve the application on the basis of ex-U.S. data alone unless (i) the data are applicable to the 
U.S. population and U.S. medical practice; (ii) the trials were performed by clinical investigators of recognized competence and pursuant to current GCP 
requirements; and (iii) the FDA is able to validate the data through an on-site inspection or other appropriate means. Additionally, the FDA's clinical trial 
requirements, including the adequacy of the patient population studied and statistical powering, must be met. Furthermore, even where the ex-U.S. study 
data are not intended to serve as the sole basis for approval, the FDA will not accept the data as support for an application for marketing approval unless the 
study is well-designed and well-conducted in accordance with GCP requirements and the FDA is able to validate the data from the study through an onsite 
inspection if deemed necessary. Many ex-U.S. regulatory authorities have similar approval requirements. In addition, such ex-U.S. trials would be subject 
to the applicable local laws of the ex-U.S. jurisdictions where the trials are conducted. There can be no assurance that the FDA or any comparable ex-U.S. 

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regulatory authority will accept data from trials conducted outside of its applicable jurisdiction. If the FDA or any comparable ex-U.S. regulatory authority 
does not accept such data, it would result in the need for additional trials.

Inadequate funding for the FDA, the SEC and other government agencies 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, increases in workload, and statutory, regulatory, and policy changes. Average 
review times at the agency have fluctuated in recent years as a result. In 2023, for example, members of Congress wrote to officials at the FDA expressing 
their concern that clinical holds should not be a means for FDA to gain additional time to review a clinical protocol. 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 drugs 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. The coronavirus pandemic has also adversely affected the operations of necessary government agencies. If a prolonged government 
shutdown occurs, it could significantly impact the ability of the FDA to timely review and process our regulatory submissions, which could have a material 
adverse effect on our business. 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. In addition, competing demands from other companies or issues can affect the timeliness for which 
the FDA can review and process our regulatory submissions.

Healthcare legislative reform measures may have a material adverse effect on our business, financial condition or results of operations. 

In the United States, there have been and continue to be a number of legislative initiatives to contain healthcare costs. For example, in March 2010, 
the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act of 2010 (collectively, the “ACA”), was 
passed, which substantially changed the way healthcare is financed by both governmental and private insurers, and significantly impacted the U.S. 
pharmaceutical industry. The ACA, among other things, subjected biological products to potential competition by lower-cost biosimilars, addressed a new 
methodology by which rebates owed by manufacturers under the Medicaid Drug Rebate Program are calculated for drugs and biologics that are inhaled, 
infused, instilled, implanted or injected, increased the minimum Medicaid rebates owed by manufacturers under the Medicaid Drug Rebate Program and 
extended the rebate program to individuals enrolled in Medicaid managed care organizations, established annual fees and taxes on manufacturers of certain 
branded prescription drugs and biologics, and created a new Medicare Part D coverage gap discount program, in which manufacturers must agree to offer 
70% (increased from 50% pursuant to the Bipartisan Budget Act of 2018, effective as of 2019) point-of-sale discounts off negotiated prices of applicable 
brand drugs and biologics to eligible beneficiaries during their coverage gap period, as a condition for the manufacturer’s outpatient drugs or biologics to 
be covered under Medicare Part D. 

Further legislative and regulatory changes under the ACA remain possible, although it is unknown what form any such changes or any law would 
take, and how or whether it may affect the biopharmaceutical industry as a whole or our business in the future. We expect that changes or additions to the 
ACA, the Medicare and Medicaid programs, such as changes allowing the federal government to directly negotiate drug prices, and changes stemming 
from other healthcare reform measures, especially with regard to healthcare access, financing or other legislation in individual states, could have a material 
adverse effect on the healthcare industry in the United States. 

Further, over the past several years there has been heightened governmental scrutiny over the manner in which biopharmaceutical manufacturers set 

prices for their marketed products, which has resulted in several U.S. Congressional inquiries and proposed and enacted federal and state legislation 
designed to, among other things, bring more transparency to product pricing, review the relationship between pricing and manufacturer patient programs, 
and reform government program reimbursement methodologies for drug products. The probability of success of these newly announced policies, many of 
which have been subjected to legal challenge in the federal court system, and their potential impact on the U.S. prescription drug marketplace is unknown. 
There are likely to be continued political and legal challenges associated with implementing these reforms as they are currently envisioned. 

Most recently, in August 2022, President Biden signed into the law the Inflation Reduction Act of 2022, or the IRA. Among other things, the IRA 

has multiple provisions that may impact the prices of drug products that are both sold into the Medicare program and throughout the United States. Starting 
in 2023, a manufacturer of a drug or biological product covered by Medicare Parts B or D must pay a rebate to the federal government if the product’s price 
increases faster than the rate of inflation. This calculation is made on a drug product by drug product basis and the amount of the rebate owed to the federal 
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of a drug product that is paid for by Medicare Parts B or D. Additionally, starting in payment year 2026, CMS will negotiate drug prices annually for a 
select number of single source Part D drugs without generic or biosimilar competition. CMS will also negotiate drug prices for a select number of Part B 
drugs starting for payment year 2028. If a drug product is selected by CMS for negotiation, it is expected that the revenue generated from such drug will 
decrease. Additional state and federal healthcare reform measures are expected to be adopted in the future, any of which could limit the amounts that 
federal and state governments will pay for healthcare products and services, which could result in reduced demand for certain biopharmaceutical products 
or additional pricing pressures. 

At the state level, legislatures have increasingly passed legislation and implemented 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. For example, California requires 
pharmaceutical manufacturers to notify certain purchasers, including health insurers and government health plans at least 60 days before any scheduled 
increase in the wholesale acquisition cost (WAC), of their product if the increase exceeds 16%, and further requires pharmaceutical manufacturers to 
explain whether a change or improvement in the product necessitates such an increase. Similarly, Vermont requires pharmaceutical manufacturers to 
disclose price information on certain prescription drugs, and to provide notification to the state if introducing a new drug with a WAC in excess of the 
Medicare Part D specialty drug threshold. In addition, in the last few years, several states have formed prescription drug affordability boards (PDABs) with 
the authority to implement upper payment limits (UPLs) on drugs sold in their respective jurisdictions. However, there are several pending federal lawsuits 
challenging the authority of states to impose UPLs.

In December 2020, the U.S. Supreme Court also held unanimously that federal law does not preempt the states’ ability to regulate pharmaceutical 

benefit managers, or PBMs, and other members of the healthcare and pharmaceutical supply chain, an important decision that appears to be leading to 
further and more aggressive efforts by states in this area. The Federal Trade Commission in mid-2022 also launched sweeping investigations into the 
practices of the PBM industry that could lead to additional federal and state legislative or regulatory proposals targeting such entities’ operations, pharmacy 
networks, or financial arrangements. Significant efforts to change the PBM industry as it currently exists in the United States may affect the entire 
pharmaceutical supply chain and the business of other stakeholders, including biopharmaceutical developers like us. Legally mandated price controls on 
payment amounts by third-party payors or other restrictions could harm our business, results of operations, financial condition and prospects. In addition, 
regional healthcare 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 healthcare programs. This could reduce the ultimate demand for our product candidates, if 
approved, or put pressure on our product pricing, which could negatively affect our business, results of operations, financial condition and prospects.

In the European Union, similar political, economic and regulatory developments may affect our ability to profitably commercialize our products. In 

addition to continuing pressure on prices and cost containment measures, legislative developments at the European Union or EU member state level may 
result in significant additional requirements or obstacles that may increase our operating costs.

We cannot predict the likelihood, nature or extent of government regulation that may arise from future legislation or administrative or executive 
action. We expect that additional federal and state 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 limited coverage and reimbursement and reduced demand 
for our products, once approved, or additional pricing pressures.

We may be subject, directly or indirectly, to federal and state healthcare fraud and abuse laws, false claims laws, and health information privacy and 
security laws. 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 any of our product candidates and begin commercializing those products in the United States, our operations may be 
subject to various federal and state fraud and abuse laws, including, without limitation, the federal Anti-Kickback Statute, the federal False Claims Act, and 
physician payments sunshine laws and regulations. These laws may impact, among other things, our proposed sales, marketing, and education programs. In 
addition, we may be subject to patient privacy regulation by both the federal government and the states in which we conduct our business. The laws that 
may affect our ability to operate include: 

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The federal Anti-Kickback Statute, which prohibits, among other things, persons from knowingly and willfully soliciting, receiving, 
offering or paying remuneration, directly or indirectly, to induce, or in return for, the purchase or recommendation of an item or 
service reimbursable under a federal healthcare program, such as the Medicare and Medicaid programs; 

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 from Medicare, Medicaid, or other government 
payors that are false or fraudulent or making a false statement to avoid, decrease or conceal an obligation to pay money to the federal 
government; 

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•

•

•

•

The federal Health Insurance Portability and Accountability Act of 1996 (HIPAA), which created new federal criminal statutes that 
prohibit executing a scheme to defraud any healthcare benefit program and making false statements relating to healthcare matters; 

HIPAA, as amended by the Health Information Technology and Clinical Health Act, and its implementing regulations, which imposes 
specified requirements relating to the privacy, security, and transmission of individually identifiable health information; 

The federal physician payments sunshine requirements under the ACA require manufacturers of drugs, devices, biologics, and 
medical supplies to report annually to CMS information related to payments and other transfers of value to physicians, certain 
advanced non-physician healthcare providers, and teaching hospitals, and ownership and investment interests held by physicians and 
other healthcare providers and their immediate family members; and 

State law equivalents of each of the above federal laws, such as anti-kickback and false claims laws that may apply to items or 
services reimbursed by any third-party payor, including governmental and private payors, to comply with the pharmaceutical 
industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal government, or 
otherwise restrict payments that may be made to healthcare providers and other potential referral sources; state laws that require drug 
manufacturers to report information related to payments and other transfers of value to physicians and other healthcare providers or 
marketing expenditures, and state laws governing the privacy and security of health information in specified circumstances, many of 
which differ from each other in significant ways and may not have the same effect, 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. In addition, recent healthcare reform legislation has strengthened these 
laws. For example, the ACA, among other things, amended the intent requirement of the federal anti-kickback and criminal healthcare fraud statutes. A 
person or entity no longer needs to have actual knowledge of this statute or specific intent to violate it. Moreover, the ACA provides that the U.S. 
government may assert that a claim including items or services resulting from a violation of the federal anti-kickback statute constitutes a false or 
fraudulent claim for purposes of the False Claims Act. 

If our operations are found to be in violation of any of the laws described above or any other governmental regulations that apply to us, we may be 

subject to penalties, including civil and criminal penalties, damages, fines, exclusion from participation in government healthcare programs, such as 
Medicare and Medicaid, imprisonment, and the curtailment or restructuring of our operations, any of which could adversely affect our ability to operate our 
business and our results of operations. 

We may be subject to, or may in the future become subject to, U.S. federal and state, and international laws and regulations imposing obligations on 
how we collect, use, disclose, store and process personal information. Our actual or perceived failure to comply with such obligations could result in 
liability or reputational harm and could harm our business. Ensuring compliance with such laws could also impair our efforts to maintain and expand 
our customer base, and thereby decrease our revenue.

In many activities, including the conduct of clinical trials, we are subject to domestic and international laws and regulations governing data privacy, 

data security, and the protection of health-related and other personal information. The regulatory framework for collecting, using, safeguarding, sharing, 
transferring and other processing of personal information worldwide is rapidly evolving and in recent years there has been an increasing focus on privacy 
and data security issues with the potential to affect our business.

In the U.S., numerous federal and state laws and regulations, including state data breach notification laws, and federal and state consumer protection 
laws govern the collection, use, disclosure and protection of health-related and other personal information. Failure to comply with data protection laws and 
regulations, where applicable, could result in government enforcement actions, which could include civil or criminal penalties, private litigation and/or 
adverse publicity and could negatively affect our operating results and business.  For example, California enacted the California Consumer Privacy Act (the 
CCPA), which took effect on January 1, 2020, and gives California residents expanded rights to access and delete their personal information, opt out of 
certain personal information sharing and receive detailed information about how their personal information is used by requiring covered companies to 
provide new disclosures to California consumers (as that term is broadly defined) and provide such consumers new ways to opt-out of certain sales of 
personal information. The CCPA provides for civil penalties for violations, as well as a private right of action for data breaches that is expected to increase 
data breach litigation. Further, in 2020, California voters passed the California Privacy Rights Act (the CPRA), which became effective as of January 1, 
2023. The CPRA significantly amends the CCPA and imposes additional data protection obligations on companies doing business in California, including 
additional consumer rights processes, limitations on data uses, new audit requirements for higher risk data, and opt outs for certain uses of sensitive data. It 
also creates a new regulatory entity, the California Privacy Protection Agency, which is authorized to issue substantive regulations under the CPRA and 
could result in increased privacy and information security enforcement. Although the CCPA currently exempts certain health-related information, including 
clinical trial data, the CCPA and the CPRA may increase our compliance costs and potential liability. In addition to California, more U.S. states are 
enacting similar legislation, increasing compliance complexity and increasing risks of failures to 

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comply.  In 2023, comprehensive privacy laws in Virginia, Colorado, Connecticut, and Utah all took effect, and laws in Montana, Oregon, and Texas will 
take effect in 2024. In addition, laws in other U.S. states are set to take effect beyond 2024, and additional U.S. states have proposals under consideration, 
all of which are likely to increase our regulatory compliance costs and risks, exposure to regulatory enforcement action and other liabilities.

Additionally, the collection, use, disclosure, transfer, or other processing of personal data in the European Union, including personal health data, is 

subject to the General Data Protection Regulation, or GDPR, which took effect in 2018 and applies to companies within and outside of the European 
Union. The GDPR, which is wide-ranging in scope, imposes several requirements relating to the consent of the individuals to whom the personal data 
relates, the information provided to the individuals, the security and confidentiality of the personal data, data breach notification and the use of third-party 
processors in connection with the processing of the personal data. The GDPR also enhances enforcement authority and imposes large penalties for 
noncompliance, including the potential for fines of up to €20 million or 4% of the annual global revenues of the infringer, whichever is greater.  
Additionally, the GDPR confers a private right of action on data subjects and consumer associations to lodge complaints with supervisory authorities, seek 
judicial remedies, and obtain compensation for damages resulting from violations of the GDPR. In addition, the withdrawal of the United Kingdom from 
the European Union and the subsequent separation of the data protection regimes of these territories mean we are required to also comply with similar data 
protection laws in the United Kingdom, which may lead to additional compliance costs and could increase our overall risk. 

Laws in the European Economic Area (EEA), Switzerland, and the UK on data export are also evolving.  For example, the GDPR only permits 

exports of data outside the EU where there is a suitable data transfer solution in place to safeguard personal data (e.g. the EU Commission approved 
Standard Contractual Clauses or certification under the recently-adopted Data Privacy Framework). If we have to rely on third parties to carry out services 
for us, including processing personal data on our behalf, we are required under GDPR and similar laws in Switzerland and the UK to enter into contractual 
arrangements to help ensure that these third parties only process such data according to our instructions and have sufficient security measures in place. Any 
security breach or non-compliance with our contractual terms or breach of applicable law by such third parties could result in enforcement actions, 
litigation, fines and penalties or adverse publicity and could cause customers to lose trust in us, which would have an adverse impact on our reputation and 
business.  Future actions of EU, Swiss, and UK data protection authorities are difficult to predict. Some customers or other may respond to these evolving 
laws and regulations by asking us to make certain privacy or data-related contractual commitments that we are unable or unwilling to make. This could lead 
to the loss of current or prospective customers or other business relationships.

Numerous international, federal and state laws and regulations govern collection, dissemination, use and confidentiality of personally identifiable 

health information, including state privacy and confidentiality laws (including state laws requiring disclosure of breaches); federal and state consumer 
protection and employment laws; HIPAA; and European and other international data protection laws. These laws and regulations are increasing in 
complexity and number, may change frequently and sometimes conflict.

HIPAA establishes a set of national privacy and security standards for the protection of individually identifiable health information, including 

protected health information, or PHI, by health plans, certain healthcare clearinghouses and healthcare providers that submit certain covered transactions 
electronically, or covered entities, and their ‘‘business associates,’’ which are persons or entities that perform certain services for, or on behalf of, a covered 
entity that involve creating, receiving, maintaining or transmitting PHI. While we are not currently a covered entity or business associate under HIPAA, we 
may receive identifiable information from these entities. Failure to receive this information properly could subject us to HIPAA’s criminal penalties, which 
may include fines up to $50,000 per violation and/or imprisonment. In addition, responding to government investigations regarding alleged violations of 
these and other laws and regulations, even if ultimately concluded with no findings of violations or no penalties imposed, can consume company resources 
and impact our business and, if public, harm our reputation.

In addition, various states, such as California and Massachusetts, have implemented similar privacy laws and regulations, such as the California 

Confidentiality of Medical Information Act, that impose restrictive requirements regulating the use and disclosure of health information and other 
personally identifiable information. In addition to fines and penalties imposed upon violators, some of these state laws also afford private rights of action to 
individuals who believe their personal information has been misused. California’s patient privacy laws, for example, provide for penalties of up to 
$250,000 and permit injured parties to sue for damages. 

Other states have implemented similar laws protecting identifiable health and personal information, and most such laws differ from each other in 

significant ways and may not be preempted by HIPAA, thus complicating compliance efforts. 

The interplay of federal and state laws may be subject to varying interpretations by courts and government agencies, creating complex compliance 

issues for us and our clients and potentially exposing us to additional expense, adverse publicity and liability. Further, as regulatory focus on privacy issues 
continues to increase and laws and regulations concerning the protection of personal information expand and become more complex, these potential risks to 
our business could intensify. 

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In addition, the interpretation and application of consumer, health-related, and data protection laws are often uncertain, contradictory, and in flux.

The legislative and regulatory landscape for privacy and data security continues to evolve, and there has been an increasing focus on privacy and 
data security issues which may affect our business. Despite our efforts, we may not have fully complied in the past and may not in the future. Failure to 
comply with current and future laws and regulations could result in government enforcement actions (including the imposition of significant penalties), 
criminal and civil liability for us and our officers and directors, private litigation and/or adverse publicity that negatively affects our business.

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

Our research and development activities and our third-party manufacturers’ and suppliers’ activities involve the controlled storage, use, and disposal 

of hazardous materials, including the components of our product candidates and other hazardous compounds. We and our manufacturers and suppliers are 
subject to laws and regulations governing the use, manufacture, storage, handling, and disposal of these hazardous materials. In some cases, these 
hazardous materials and various wastes resulting from their use are stored at our and our manufacturers’ facilities pending their use and disposal. We 
cannot eliminate the risk of contamination, which could cause an interruption of our research and development efforts, commercialization efforts and 
business operations and environmental damage resulting in costly clean-up and liabilities under applicable laws and regulations governing the use, storage, 
handling, and disposal of these materials and specified waste products. Although we believe that the safety procedures utilized by us and our third-party 
manufacturers for handling and disposing of these materials generally comply with the standards prescribed by these laws and regulations, we cannot 
guarantee that this is the case or eliminate the risk of accidental contamination or injury from these materials. In such an event, we may be held liable for 
any resulting damages and such liability could exceed our resources and state or federal or other applicable authorities may curtail our use of specified 
materials and/or interrupt our business operations. Furthermore, environmental laws and regulations are complex, change frequently, and have tended to 
become more stringent. We cannot predict the impact of such changes and cannot be certain of our future compliance. Given the nature of the research and 
development work conducted by us, we do not currently carry biological or hazardous waste insurance coverage.  

Laws and regulations governing international operations may preclude us from developing, manufacturing and selling certain products outside of the 
United States and require us to develop, implement and maintain costly compliance programs. 

To develop, manufacture and sell certain products outside the United States, we must dedicate resources to comply with numerous laws and 
regulations in each jurisdiction in which we operate. The Foreign Corrupt Practices Act (FCPA), prohibits any United States individual or business from 
paying, offering, authorizing payment or offering anything of value, directly or indirectly, to any foreign official, political party or candidate for the purpose 
of influencing any act or decision of the foreign entity in order to assist the individual or business in obtaining or retaining business. The FCPA also 
obligates companies whose securities are listed in the United States to comply with certain accounting provisions requiring the company to maintain books 
and records that accurately and fairly reflect all transactions of the corporation, including international subsidiaries, and to devise and maintain an adequate 
system of internal accounting controls for international operations. 

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

Various laws, regulations and executive orders also restrict the use and dissemination outside of the United States, or the sharing with certain non-
United States nationals, of information classified for national security purposes, as well as certain products and technical data relating to those products. 
These laws may preclude us from developing, manufacturing, or selling certain products and product candidates outside of the U.S., which could limit our 
growth potential and increase our development costs. 

The failure to comply with laws governing international business practices may result in substantial civil and criminal penalties and suspension or 
debarment from government contracting. The SEC also may suspend or bar issuers from trading securities on U.S. exchanges for violations of the FCPA’s 
accounting provisions and export control laws. 

Our internal computer systems, or those of our collaborators or other contractors or consultants, may fail or suffer cybersecurity incidents, which 
could result in a material disruption of our product development programs. 

Our internal information technology, or IT, systems and those of our current and any future collaborators and other contractors, consultants, or 

clinical trial sites are vulnerable to damage from cyberattacks, computer viruses, unauthorized access, natural disasters, terrorism, war and 
telecommunication and electrical failures. Cyberattacks are increasing in their frequency, sophistication and intensity, and have become increasingly 
difficult to detect. Cyberattacks could include the deployment of harmful malware, 

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ransomware, denial-of-service attacks, unauthorized access to or deletion of files, social engineering, phishing and other means to affect service reliability 
and threaten the confidentiality, integrity and availability of information and IT systems. If any of the above events were to occur and cause interruptions in 
our 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 preclinical or clinical trial data 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 cybersecurity incident 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 product candidates could be delayed. The market 
perception of the effectiveness of our security measures could be harmed and our reputation and credibility could be damaged. Although we develop and 
maintain systems and controls designed to prevent these events from occurring, and we have processes to identify and mitigate threats, the development 
and maintenance of these systems, controls and processes is costly and requires ongoing monitoring and updating as technologies evolve and efforts to 
overcome security measures become increasingly sophisticated. Moreover, despite our efforts, the possibility of these events occurring cannot be 
eliminated entirely. In addition, there can be no assurance that we will promptly detect any such disruption or cybersecurity incident, if at all. As we 
outsource more of our information systems to vendors, engage in more electronic transactions with payors and patients, and rely more on cloud-based 
information systems, the related security risks will increase and we will need to expend additional resources to protect our technology and information 
systems. In addition, there can be no assurance that our internal IT systems or those of our third-party contractors, or our consultants’ efforts to implement 
adequate security and control measures, will be sufficient to protect us against breakdowns, service disruption, data deterioration or loss in the event of a 
system malfunction, or prevent data from being stolen or corrupted in the event of a cyberattack, cybersecurity incident, industrial espionage attacks or 
insider threat attacks which could result in financial, legal, business or reputational harm, as well as loss of competitive advantage or loss of consumer 
confidence.  

Ethical, legal and social concerns about synthetic biology and genetic engineering could limit or prevent the use of our technologies and limit our 
revenues. 

Our technologies involve the use of synthetic biology and genetic engineering. Public perception about the safety and environmental hazards of, and 

ethical concerns over, synthetic biology and genetic engineering could influence public acceptance of our technologies, product candidates and processes. 
If we and our collaborators are not able to overcome the ethical, legal and social concerns relating to synthetic biology and genetic engineering, our 
technologies, product candidates and processes may not be accepted. These concerns could result in increased expenses, regulatory scrutiny and increased 
regulation, trade restrictions on imports of Synthetic Biotics, delays or other impediments to our programs or the public acceptance and commercialization 
of Synthetic Biotics. Further, there is a risk that Synthetic Biotics made using our technologies could result in adverse health effects or other adverse events, 
which could also lead to negative publicity. We design and produce product candidates with characteristics comparable or disadvantaged to those found in 
naturally occurring organisms or enzymes in a controlled laboratory; however, the release of such organisms into uncontrolled environments could have 
unintended consequences. Any adverse effect resulting from such a release could have a material adverse effect on our business, financial condition or 
results of operations and we may have exposure to liability for any resulting harm. 

Risks Related to Our Intellectual Property 

We may not be successful in obtaining or maintaining necessary rights to Synthetic Biotics, product candidates and processes for our development 
pipeline through acquisitions and in-licenses. 

Presently, we have rights to certain intellectual property, through licenses from third parties and under patents and patent applications owned by us. 
The growth of our business will likely depend in part on our ability to obtain, maintain or enforce our and our licensors’ intellectual property rights and to 
acquire or in-license additional proprietary rights. For example, our programs may involve additional product candidates or delivery systems that may 
require the use of additional proprietary rights held by third parties. 

In addition, our product candidates may require specific formulations to work effectively and efficiently, and these rights may be held by other third 

parties. We may be unable to develop, acquire or in-license compositions, methods of use, processes or other third-party intellectual property rights from 
third parties that we identify. The licensing and acquisition of third-party intellectual property rights is a competitive area, and a number of other companies 
may also be pursuing strategies to license or acquire third-party intellectual property rights that we may consider attractive. These companies could have a 
competitive advantage over us due to their size, cash resources and greater clinical development and commercialization capabilities. 

For example, we have previously and may continue to collaborate with academic institutions to accelerate our preclinical research or development 

under written agreements with these institutions. Typically, these institutions provide an option to negotiate a license to any of the institution’s rights in 
technology resulting from the collaboration. Regardless of such right of first negotiation for intellectual property, we may be unable to negotiate a license 
within the specified time frame or under terms that are acceptable to it. If we are unable to do so, the institution may offer intellectual property rights to 
other parties, potentially blocking our ability to pursue our program. 

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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. If we are unable to 
successfully obtain rights to third-party intellectual property rights, our business, financial condition and prospects for growth could suffer. 

We intend to rely on patent rights and the status of our product candidates, if approved, as biologics eligible for exclusivity under the Biologics Price 
Competition and Innovation Act (BPCIA). If Synlogic is unable to obtain or maintain exclusivity from the combination of these approaches, Synlogic 
may not be able to compete effectively in our markets. 

We rely or will rely upon a combination of patents, trade secret protection, and confidentiality agreements to protect the intellectual property related 
to our technologies and product candidates. Our success depends in large part on our and our licensors’ ability to obtain regulatory exclusivity and maintain 
patent and other intellectual property protection in the United States and in other countries with respect to our proprietary technology and products. 

We have sought to protect our proprietary position by filing patent applications in the United States and abroad related to our product candidates that 
are important to our business. This process is expensive and time consuming, and we may not be able to file and prosecute all necessary or desirable patent 
applications at a reasonable cost or in a timely manner. 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. 

The patent position of biotechnology and pharmaceutical companies generally is highly uncertain and involves complex legal and factual questions 
for which legal principles remain unsolved. The patent applications that we own, or in-license may fail to result in issued patents with claims that cover our 
product candidates in the United States or in other foreign countries. There is no assurance that all potentially relevant prior art relating to our patents and 
patent applications has been found, which can invalidate a patent or prevent a patent from being issued from a pending patent application. Even if patents 
do successfully issue, and even if such patents cover our product candidates, third parties may challenge their validity, enforceability, or scope, which may 
result in such patents being narrowed, found unenforceable or invalidated. Furthermore, even if they are unchallenged, our patents and patent applications 
may not adequately protect our intellectual property, provide exclusivity for our product candidates, or prevent others from designing around our claims. 
Any of these outcomes could impair our ability to prevent competition from third parties, which may have an adverse impact on our business. 

We, independently or together with our licensors or collaborators, have filed several patent applications covering various aspects of our product 
candidates. We cannot offer any assurances about which, if any, patents will issue, the breadth of any such patent or whether any issued patents will be 
found invalid and unenforceable or will be threatened by third parties. Any successful opposition to these patents or any other patents owned by or licensed 
to us after patent issuance could deprive us of rights necessary for the successful commercialization of any product candidates that we may develop. 
Further, if we encounter delays in regulatory approvals, the period of time during which we could market a product candidate under patent protection could 
be reduced. 

Even if we cannot obtain and maintain effective protection of exclusivity from our regulatory efforts and intellectual property rights, including 
patent protection, data exclusivity or orphan drug exclusivity, for our product candidates, we believe that our product candidates will be protected by 
exclusivity that prevents approval of a biosimilar in the United States for a period of twelve years from the time the product to which it claims similarity 
was first approved. However, The Biologics Price Competition and Innovation Act of 2009, Title VII, Subtitle A of the Patent Protection and Affordable 
Care Act, Pub.L.No.111-148, 124 Stat.119, Sections 7001-02 signed into law March 23, 2010, and codified in 42 U.S.C. §262 (the BPCIA), created an 
elaborate and complex patent dispute resolution mechanism for biosimilars that could prevent us from launching our product candidates in the United 
States or could substantially delay such launches. Current biosimilars litigation is addressing certain requirements of the BPCIA which is creating 
uncertainty over how certain terms of the BPCIA should be construed and this presents uncertainty for both the biologics innovator and biosimilar party. 
The BPCIA mechanism required for biosimilar applicants may pose greater risk that patent infringement litigation will disrupt our activities and add 
increased expenses as well as divert management’s attention. If a biosimilar version of one of our product candidates were approved in the United States, it 
could have a negative effect on our business. 

We may not have sufficient patent term protections for our product candidates to effectively protect our business. 

Patents have a limited term. In the United States, the statutory expiration of a patent is generally 20 years after it is filed. Although various 
extensions may be available, the life of a patent, and the protection it affords, is limited. Even if patents covering our product candidates are obtained, once 
the patent life has expired for a product candidate, we may be open to competition. In addition, upon issuance in the United States any patent term can be 
adjusted based on specified delays caused by the applicant(s) or the USPTO. 

Patent term extensions under the Hatch-Waxman Act in the United States and under supplementary protection certificates in Europe may be 
available to extend the patent or data exclusivity terms of our product candidates. We will likely seek patent term extensions, and we cannot provide any 
assurances that any such patent term extensions will be obtained and, if so, for how long. As a result, we may not be able to maintain exclusivity for our 
product candidates for an extended period after regulatory approval, if any, which would negatively impact our business, financial condition, results of 
operations and prospects. If we do not have sufficient 

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patent terms or regulatory exclusivity to protect our product candidates, our business and results of operations will be adversely affected. 
Changes in U.S. and foreign patent law could diminish the value of patents in general, thereby impairing our ability to protect our products, and recent 
patent reform legislation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or 
defense of our issued patents. 

As is the case with other biotechnology companies, our success is heavily dependent on patents. Obtaining and enforcing patents in the 

biotechnology industry involves both technological and legal complexity, and is therefore costly, time-consuming and inherently uncertain. In addition, the 
United States has recently enacted and is currently implementing wide-ranging patent reform legislation. Recent U.S. Supreme Court rulings have 
narrowed the scope of patent protection available in specified circumstances and weakened the rights of patent owners in specified situations. In addition to 
increasing uncertainty with regard to our ability to obtain patents in the future, this combination of events has created uncertainty with respect to the value 
of patents, once obtained. Depending on decisions by the U.S. Congress, the federal courts, and the USPTO, the laws and regulations governing patents 
could change in unpredictable ways that would weaken our ability to obtain new patents or to enforce our existing patents and patents that we might obtain 
in the future. 

European patent practice is expected to change now that  the European Unitary Patent (UP) and Unified Patent Court (UPC) went into force on June 

1, 2023. The new system will impact both pending European applications and granted European patents, and uncertainty remains about long-term 
implications of this change. The UPC may particularly present uncertainties for our ability to protect and enforce our patent rights against competitors in 
Europe. While the UPC is being implemented to provide more certainty and efficiency to patent enforcement throughout Europe, it will also provide our 
competitors with a new forum to use to centrally revoke our European patents. It will be several years before we will understand the scope of patent rights 
that will be recognized and the strength of patent remedies that will be provided by the UPC. We will have the right to opt our patents out of the UPC 
system over the first seven years, but doing so may preclude us from realizing the benefits of the new unified court.

Obtaining And Maintaining Our Patent Protection Depends on Compliance with Various Procedural, Document Submission, Fee Payment and Other 
Requirements Imposed by Governmental Patent Agencies, And Our Patent Protection Could be Reduced or Eliminated for Non-Compliance with 
These Requirements.

Periodic maintenance fees on any issued patents are due to be paid to the USPTO and foreign patent agencies in several stages over the lifetime of 

the patent. The USPTO and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payment and 
other similar provisions during the patent application process. Although an inadvertent lapse can in many cases be cured by payment of a late fee or by 
other means in accordance with the applicable rules, there are situations in which noncompliance can result in abandonment or lapse of the patent or patent 
application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. Noncompliance events that could result in abandonment or 
lapse of a patent or patent application include failure to respond to official actions within prescribed time limits, non-payment of fees, and failure to 
properly legalize and submit formal documents. In any such event, our competitors might be able to enter the market, which would have a material adverse 
effect on our business.

If we are unable to maintain effective proprietary rights for our product candidates or any future product candidates, we may not be able to compete 
effectively in our proposed markets. 

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. We also utilize processes for which patents are difficult to enforce. In addition, other elements of our 
products, and many elements of our product candidate discovery and development processes involve proprietary know-how, information or technology that 
is not covered by patents. Trade secrets may be difficult to protect. We seek to protect our proprietary technology and processes, in part, by entering into 
confidentiality agreements with our employees, consultants, collaborators, advisors, independent contractors or other third parties. We also seek to preserve 
the integrity and confidentiality of our data and trade secrets, including by maintaining physical and electronic security of our premises and our information 
technology systems. While we have confidence in these individuals, organizations and systems, agreements or security measures may be breached, and we 
may not have adequate remedies for any breach. In addition, competitors may otherwise gain access to our trade secrets or independently develop 
substantially equivalent information and techniques. Furthermore, the laws of some foreign countries do not protect proprietary rights to the same extent or 
in the same manner as the laws of the United States. As a result, we may encounter significant problems in protecting and defending our intellectual 
property both in the United States and abroad. If we are unable to prevent unauthorized material disclosure of our intellectual property to third parties, or 
misappropriation of our intellectual property by third parties, we may not be able to establish or maintain a competitive advantage in our market, which 
could materially adversely affect our business, operating results, and financial condition. 

Although we expect all of our employees and consultants to assign their inventions to us, and all of our employees, consultants, collaborators, 

advisors, independent contractors and any third parties who have access to our proprietary know-how, information, or technology to enter into 
confidentiality agreements, we cannot provide any assurances that all such agreements have been duly executed or that our trade secrets and other 
confidential proprietary information will not be disclosed or that competitors will not 

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otherwise gain access to our trade secrets or independently develop substantially equivalent information and techniques. Misappropriation or unauthorized 
disclosure of our trade secrets could impair our competitive position and may have a material adverse effect on our business, financial condition or results 
of operations. Additionally, if the steps taken to maintain our trade secrets are deemed inadequate, we may have insufficient recourse against third parties 
for misappropriating the trade secret.

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

Our commercial success depends in part on our ability to develop, manufacture, market and sell our product candidates and use our proprietary 
technology without infringing the patent rights of third parties. Numerous third-party U.S. and non-U.S. issued patents and pending applications exist in the 
area of synthetic biology. We may become aware of U.S. and foreign patents and pending patent applications owned by third parties that cover similar 
therapeutic uses as the product candidates we are developing and we may in the future pursue available proceedings in the U.S. and foreign patent offices 
to challenge the validity of such patents and patent applications. In addition, or alternatively, we may consider whether to seek to negotiate a license of 
rights to technology covered by one or more of such patents and patent applications. If any patents or patent applications cover our product candidates or 
technologies, we may not be free to manufacture or market our product candidates as planned, absent such a license, which may not be available to us on 
commercially reasonable terms, or at all. 

It is possible that we have failed to identify relevant third-party patents or applications. For example, applications filed before November 29, 2000 

and 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 and technologies 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 patents may issue with claims of relevance to our technology. 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 specified limitations, be 
later amended in a manner that could cover our technologies, our product candidates or the use of our product candidates. 

There have been many lawsuits and other proceedings filed by third parties involving patent and other intellectual property rights in the 

biotechnology and pharmaceutical industries, including patent infringement lawsuits, interferences, oppositions, and reexamination, post-grant review and 
equivalent proceedings before the USPTO and corresponding foreign patent offices. Numerous U.S. and foreign issued patents and pending patent 
applications, which are owned by third parties, exist in the fields in which we are developing product candidates. As the biotechnology and pharmaceutical 
industries expand and more patents are issued, the risk increases that our product candidates may be subject to claims of infringement of the patent rights of 
third parties. 

Parties making claims against us may obtain injunctive or other equitable relief, which could effectively block our ability to further develop and 

commercialize one or more of our product candidates. Defense of these claims, regardless of their merit, would involve substantial litigation expense and 
would be a substantial diversion of employee resources from our business. In the event of a successful claim of infringement against us, we may have to 
pay substantial damages, including treble damages and attorneys’ fees for willful infringement, pay royalties, redesign our infringing products or obtain one 
or more licenses from third parties, which may be impossible or require substantial time and monetary expenditure. 

We depend, in part, on our licensors to file, prosecute, maintain, defend and enforce patents and patent applications that are material to our business. 

While we normally seek and gain the right to fully prosecute the patent applications relating to our product candidates, there may be times when the 

patent applications enabling our product candidates are controlled by our licensors. If any of our existing or future licensors fail to appropriately and 
broadly prosecute and maintain patent protection for patents covering any of our product candidates, our ability to develop and commercialize those 
product candidates may be adversely affected and we may not be able to prevent competitors from making, using, importing, and selling competing 
products. In addition, even where we now have the right to control patent prosecution of patents and patent applications we have licensed from third 
parties, we may still be adversely affected or prejudiced by actions or inactions of our licensors in effect from actions prior to us assuming control over 
patent prosecution. 

If we fail to comply with obligations in the agreements under which we license intellectual property and other 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 are a party to certain intellectual property license agreements and may enter into additional license agreements in the future. Our existing 
agreements impose, and future license agreements may impose, certain obligations, including the payment of milestones and royalties based on revenues 
from sales of our products utilizing the technologies licensed from our licensors, and such obligations could adversely affect the overall profitability for us 
of any products that we may seek to commercialize. In addition, we will need to 

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outsource and rely on third parties for many aspects of the clinical development, sales and marketing of our product candidates covered under our license 
agreements. Delay or failure by these third parties could adversely affect the continuation of our license agreements with our third-party licensors. If we fail 
to comply with our obligations under these agreements, or we are subject to a bankruptcy, these agreements may be subject to termination by the licensor 
which could have a material adverse effect on our business. 

We may be involved in lawsuits to protect or enforce our patents or the patents of our licensors, which could be expensive, time consuming, and 
unsuccessful. 

Competitors may infringe our patents or the patents of our licensors. To cease such infringement or unauthorized use, we or one of our licensing 

partners may be required to file patent infringement claims against a third-party to enforce one of our patents which can be expensive, time-consuming and 
unpredictable. In addition, in an infringement proceeding or a declaratory judgment action against us, a court may decide that one or more of our patents is 
not valid or is unenforceable or may refuse to stop the other party from using the technology at issue on the grounds that our patents do not cover the 
technology in question. An adverse result in any litigation or defense proceeding could put one or more of our patents at risk of being invalidated, held 
unenforceable or interpreted narrowly and could put our patent applications at risk of not issuing. Defense of these claims, regardless of their merit, would 
involve substantial litigation expense and would be a substantial diversion of employee resources from our business. 

If we or one of our licensing partners were to initiate legal proceedings against a third-party to enforce a patent covering one of our product 

candidates, the defendant could counterclaim that the patent covering our product candidate is invalid and/or unenforceable. In patent litigation in the 
United States, defendant counterclaims alleging invalidity and/or unenforceability are commonplace, and there are numerous grounds upon which a third-
party can assert invalidity or unenforceability of a patent. Grounds for a validity challenge could be an alleged failure to meet any of several statutory 
requirements, including lack of novelty, obviousness, written description, clarity or non-enablement. Grounds for an unenforceability assertion could be an 
allegation that someone connected with prosecution of the patent withheld relevant information from the USPTO, or made a misleading statement, during 
prosecution. Third parties may also raise similar claims before administrative bodies in the United States or other jurisdictions, even outside the context of 
litigation. Such mechanisms include re-examination, inter partes review, post-grant review and equivalent proceedings in foreign jurisdictions, such as 
opposition or derivation proceedings. Such proceedings could result in revocation or amendment to our patents in such a way that they no longer cover and 
protect our product candidates. The outcome following legal assertions of invalidity and unenforceability is unpredictable. With respect to the validity of 
our patents, for example, we cannot be certain that there is no invalidating prior art of which we, our patent counsel, and the patent examiner were unaware 
during prosecution. If a defendant were to prevail on a legal assertion of invalidity, unpatentability and/or unenforceability, we may lose at least part, and 
perhaps all, of the patent protection on our product candidates. Such a loss of patent protection could have a material adverse impact on our business. 

Interference or derivation proceedings provoked by third parties or brought by us or declared by the USPTO may be necessary to determine the 
priority of inventions or correct inventorship with respect to our patents or patent applications or those of our licensors. An unfavorable outcome could 
result in a loss of our current patent rights and could require us to cease using the related technology or to attempt to license rights to us from the prevailing 
party. Our business could be harmed if the prevailing party does not offer us a license on commercially reasonable terms. Our defense of litigation, 
derivation or interference proceedings may result in a decision adverse to our interests and, even if successful, may result in substantial costs and distract 
our management and other employees. In addition, we may be unable to raise the funds necessary to conduct our clinical trials, continue our research 
programs, license necessary technology from third parties, or enter into development partnerships that would help us bring our product candidates to 
market. 

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. There could also be public announcements of the results of 
hearings, motions, or other interim proceedings or developments. Any disclosure of confidential information could adversely affect our business. 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. 

We may be subject to claims challenging the inventorship of our patents and other intellectual property. 

We may in the future be subject to claims that former employees, consultants, collaborators, advisors, independent contractors or other third parties 

have an interest in our patents or other intellectual property as an inventor or co-inventor or other claims challenging the inventorship of our patents or 
ownership of our intellectual property (including patents and intellectual property that we in-license). Therefore, our rights to these patents may not be 
exclusive and third parties, including competitors, may have access to intellectual property that is important to our business. In addition, co-owners from 
whom we do not yet have a license or assignment may raise claims surrounding inventorship or ownership of patents that ultimately issue from this patent 
family, potentially resulting in issued patents to which we would not have rights under our existing license agreements. Further, in jurisdictions outside the 
United States, a license may not be enforceable unless all the owners of the intellectual property agree or consent to the license. In addition, we may have 
inventorship disputes arising from conflicting obligations of consultants or others who are involved in developing our 

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product candidates. Litigation may be necessary to defend against these and other claims challenging inventorship of our patents. If we fail in defending 
any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights, such as exclusive ownership of, or right to use, 
valuable intellectual property. Such an outcome could have a material adverse effect on our business. Even if we are successful in defending against such 
claims, litigation could result in substantial costs and be a distraction to management and other employees. 

We may be subject to claims that our employees, consultants, collaborators, advisors, independent contractors or other third parties have wrongfully 
used or disclosed confidential information of third parties or that our employees have wrongfully used or disclosed alleged trade secrets of their former 
employers. 

We have received confidential and proprietary information from third parties. In addition, we employ individuals who were previously employed at 

universities, academic research institutions and at other biotechnology or pharmaceutical companies, including our competitors or potential competitors. 
Although we have written agreements with and make every effort to ensure that our employees, consultants, collaborators, advisors, independent 
contractors or other third parties do not use the proprietary information or intellectual property rights of others in their work for us, we may in the future be 
subject to claims that our employees, consultants, collaborators, advisors, independent contractors or other third parties have inadvertently or intentionally 
used or disclosed confidential information of these third parties. Litigation may be necessary to defend against these claims. If we fail in defending any 
such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or personnel, which could adversely impact our 
business. Even if we are successful in defending against such claims, litigation could result in substantial costs and be a distraction to management and 
other employees. 

We may not be able to protect our intellectual property rights throughout the world. 

We have limited intellectual property rights outside the United States. Filing, prosecuting, and defending patents on product candidates in all 

countries throughout the world would be prohibitively expensive, and intellectual property rights in some countries outside the United States can have a 
different scope and strength and be less extensive than those in the United States. In addition, the laws of some foreign countries do not protect intellectual 
property rights to the same extent as federal and state laws in the United States. Consequently, we may not be able to prevent third parties (including 
competitors) from practicing our inventions in all countries outside the United States, or from selling or importing products made using our inventions in 
and into the United States or other jurisdictions. Competitors may use our technologies in jurisdictions where we have not obtained patent protection to 
develop their own products and, further, may export otherwise infringing products to territories where we have patent protection, but where enforcement 
rights are not as strong as those in the United States. These products may compete with our products 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 some countries, particularly some developing countries, do not favor the enforcement of patents, trade secrets, and other intellectual property 
protection, particularly those relating to biopharmaceutical products, which could make it difficult in those jurisdictions for us to stop the infringement or 
misappropriation of our patents or other intellectual property rights, or the marketing of competing products in violation of our proprietary rights. 
Proceedings to enforce our patents and other intellectual property rights in foreign jurisdictions, whether or not successful, could result in substantial costs 
and divert our efforts and attention from other aspects of our business. Furthermore, such proceedings could put our patents at risk of being invalidated, 
held unenforceable or interpreted narrowly and could put our patent applications at risk of not issuing and could provoke third parties to assert claims of 
infringement or misappropriation 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. 

Additionally, Europe's Unified Patent Court (UPC) may present uncertainties for our ability to protect and enforce our patent rights against 

competitors in Europe. Although this new court has been implemented to provide more certainty and efficiency to patent enforcement throughout Europe, it 
will also provide our competitors with a new forum to use to centrally challenge our patents if opted into the UPC, rather than having to seek invalidity or 
non-infringement decisions on a country-by-country basis. It will be several years before the scope of patent rights that will be recognized and the strength 
of patent remedies that will be provided is known.

Some of our intellectual property may be subject to federal regulations such as “march-in” rights, certain reporting requirements and a preference for 
U.S.-based companies if it is determined that our intellectual property has been discovered through government-funded programs. 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 acquired or licensed or may acquire or license in the future may have been generated through the 
use of U.S. government funding and may therefore be subject to certain federal regulations. These U.S. government rights include a non-exclusive, non-
transferable, irrevocable worldwide license to use inventions for any governmental 

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purpose. In addition, the U.S. government has the right, under certain limited circumstances, 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 the grant recipient fails 
to disclose the invention to the government or fails 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 to expend 
substantial resources. In addition, the U.S. government requires that any products embodying any of these inventions or produced through the use of any of 
these inventions be manufactured substantially in the United States. This preference for U.S. industry may be waived by the federal agency that provided 
the funding if the owner or assignee 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. industry may limit our ability to contract with non-U.S. product manufacturers for 
products relating to such intellectual property. To the extent any of our future intellectual property is also generated through the use of U.S. government 
funding, the provisions of the Bayh-Dole Act may similarly apply.

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

We have filed for trademark registration of certain marks relating to our current branding. If our trademarks and trade names are not adequately 
protected, we may not be able to build name recognition in our markets of interest and our business may be adversely affected. Our unregistered trademarks 
or trade names may be challenged, infringed, circumvented or declared generic or determined to be infringing on other marks. We may not be able to 
protect our rights to these trademarks and trade names, 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 claims brought by owners of other registered 
trademarks or trademarks that incorporate variations of our unregistered trademarks or trade names. Over the long term, if we are unable to successfully 
register our trademarks and trade names and 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 and could adversely 
impact our financial condition or results of operations. 

Risks Related to Our Reliance on Third Parties 

We have historically relied on and may in the future rely on third parties to conduct some aspects of our product formulation, research, preclinical, and 
clinical studies, and those third parties may not perform satisfactorily, including by failing to meet deadlines for the completion of such formulation, 
research or testing. 

We have historically relied on and may in the future rely upon third parties, including independent clinical investigators, contracted laboratories and 

third-party CROs, to conduct our preclinical studies and clinical trials, as well as certain product candidate discovery and development activities, in 
accordance with applicable regulatory requirements and to monitor and manage data for our ongoing preclinical and clinical programs. We have historically 
relied on and may in the future  rely on these parties for execution of our preclinical studies and clinical trials, and control only certain aspects of their 
activities. Nevertheless, we are responsible for ensuring that each of our studies and trials is conducted in accordance with the applicable protocol, legal and 
regulatory requirements and scientific standards, and our reliance on these third parties does not relieve us of our regulatory responsibilities. We and any 
third-party contractors and CROs we engage will be required to comply with GLP, as applicable, and GCP requirements, which are regulations and 
guidelines enforced by the FDA, the EMA and other comparable foreign regulatory authorities for all of our products in clinical development. Regulatory 
authorities enforce these GLP and GCP through periodic inspections of laboratories conducting GLP studies, and clinical trial sponsors, principal 
investigators, CROs, and trial sites when auditing for GCP compliance. If we, our investigators or any of our CROs or contracted laboratories that we 
engage fail to comply with applicable GLP and GCP, as applicable, the data generated in our preclinical studies and clinical trials may be deemed 
unreliable and the FDA, the EMA or other comparable foreign regulatory authorities may require us to perform additional preclinical studies or clinical 
trials before approving our marketing applications for our therapeutic product candidates. We cannot assure you that upon inspection by a given regulatory 
authority, such regulatory authority will determine that any of our preclinical studies or clinical trials comply with applicable GLP or GCP regulations. In 
addition, our clinical trials must be conducted with product produced in compliance with applicable cGMP regulations. Our failure to comply with these 
regulations may require us to repeat preclinical studies or clinical trials, which would delay the regulatory approval process. 

Further, these laboratories, investigators and CROs are not our employees, and we will not be able to control, other than by contract, the amount of 
resources, including time, which they devote to our product candidates and clinical trials. If independent laboratories, investigators or CROs fail to devote 
sufficient resources to the development of our product candidates, or if their 

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performance is substandard, it may delay or compromise the prospects for approval and commercialization of any product candidates that we develop. In 
addition, the use of third-party service providers requires us to disclose our proprietary information to these parties, which could increase the risk that this 
information will be misappropriated. 

There is a limited number of third-party service providers that specialize or have the expertise required to achieve our business objectives. If any of 

our relationships with these third-party laboratories, CROs or clinical investigators terminate, we may not be able to enter into arrangements with 
alternative laboratories, CROs or investigators or to do so in a timely manner or on commercially reasonable terms. If laboratories, CROs or clinical 
investigators do not successfully carry out their contractual duties or obligations or meet expected deadlines, if they need to be replaced or if the quality or 
accuracy of the clinical data they obtain is compromised due to the failure to adhere to our preclinical or clinical protocols, regulatory requirements or for 
other reasons, our preclinical studies or clinical trials may be extended, delayed or terminated and we may not be able to obtain regulatory approval for or 
successfully commercialize our product candidates. 

Switching or adding additional laboratories or CROs (or investigators) involves additional cost and requires management time and focus. In 
addition, there is a natural transition period when a new laboratory or CRO commences work. As a result, delays occur, which can materially impact our 
ability to meet our desired clinical development timelines. Though we carefully manage our relationships with our contracted laboratories and CROs, there 
can be no assurance that we will not encounter similar challenges or delays in the future or that these delays or challenges will not have a material adverse 
impact on our business, financial condition and results of operations. 

In addition, clinical investigators may serve as scientific advisors or consultants to us from time to time and may receive cash compensation in 

connection with such services. If these relationships and any related compensation result in perceived or actual conflicts of interest, or the FDA concludes 
that the financial relationship may have affected the interpretation of the preclinical study or clinical trial, the integrity of the data generated at the 
applicable preclinical study or clinical trial site may be questioned and the utility of the preclinical study or clinical trial itself may be jeopardized, which 
could result in the delay or rejection by the FDA. Any such delay or rejection could prevent us from commercializing our clinical-stage product candidate 
or any future therapeutic product candidates it may develop. 

We have historically relied on and may in the future rely on third-party supply and manufacturing partners for drug supplies for our late-stage clinical 
activities and may do the same for any commercial supplies of our product candidates. 

We have historically relied on and may in the future rely on third-party supply and manufacturing partners to supply the materials and components 

to manufacture parts of the process of late-stage clinical trial drug supplies. We have not yet manufactured or formulated any product candidate on a 
commercial scale and may not be able to do so for any of our product candidates. We will work to develop and optimize our manufacturing process, and we 
cannot be sure that the process will result in therapies that are safe, potent, effective, or in an amount that satisfies our commercial needs.

There can be no assurance that our supply of research and development, preclinical and clinical development drugs and other materials will not be 

limited, interrupted, restricted in certain geographic regions or of satisfactory quality or continue to be available at acceptable prices. In particular, any 
replacement of any product formulation manufacturer we may engage could require significant effort and expertise because there may be a limited number 
of qualified replacements. 

Synthetic Biotics are complex and difficult to manufacture. We could experience production or technology transfer problems that result in delays in 
our development or commercialization schedules or otherwise adversely affect our business. Issues with the manufacturing process, even minor deviations 
from the normal process, could result in insufficient yield, product deficiencies or manufacturing failures that result in lot failures, insufficient inventory, 
and product recalls.

Many factors common to the manufacturing of most biologics and drugs could also cause production interruptions, including raw materials 
shortages, raw material failures, growth media failures, equipment malfunctions, facility contamination, labor problems, natural disasters, disruption in 
utility services, terrorist activities, or acts of God beyond our control. We also may encounter problems in hiring and retaining the experienced specialized 
personnel needed to operate our manufacturing process, which could result in delays in our production or difficulties in maintaining compliance with 
applicable regulatory requirements.

Any problems in our manufacturing processes or facilities could make us a less attractive collaborator for academic research institutions and other 

parties, which could limit our access to additional attractive development programs, result in delays in our clinical development or marketing schedules and 
harm our business.

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

meet applicable manufacturing requirements and undergo rigorous facility and process validation tests required by regulatory authorities in order to comply 
with regulatory standards, such as cGMP regulations. Although our agreements with our suppliers and manufacturers require them to perform according to 
certain cGMP requirements such as those relating to quality control, quality assurance and qualified personnel, we have limited control over their conduct 
to implement and maintain these standards. Any of our suppliers or manufacturers could fail to comply with such requirements or to perform our 
obligations to us in relation to quality, timing or otherwise, or if our supply of components or other materials could become limited or interrupted for other 
reasons. Under 

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these circumstances, we may choose or be forced to manufacture the materials ourselves, for which we currently do not have the capabilities or resources, 
manufacture in collaboration with a third-party at their facilities, or enter into an agreement with another third-party, which we may not be able to do on 
reasonable terms, if at all. In some cases, the technical skills or technology required to manufacture our product candidates may be unique or proprietary to 
the original manufacturer and we may have difficulty, or there may be contractual restrictions prohibiting us from transferring such skills or technology to 
another third-party and a feasible alternative may not exist. These factors would increase our reliance on such manufacturer or require us to obtain a license 
from such manufacturer in order to have another third-party manufacture our product candidates. If we are required to change manufacturers for any 
reason, we will be required to verify that the new manufacturer maintains facilities and procedures that comply with quality standards and with all 
applicable regulations and guidelines and may be required to conduct bridging studies or repeat clinical trials to assure comparable safety, purity and 
potency. The delays associated with the verification of a new manufacturer could negatively affect our ability to develop product candidates in a timely 
manner or within budget. 

In addition, our suppliers and manufacturers are subject to inspection and approval by regulatory authorities before we can commence the 
manufacture and sale of any of our product candidates, and thereafter are subject to ongoing inspection from time to time. Our failure, or the failure of our 
third-party manufacturers, to comply with applicable regulations could result in regulatory actions, such as the issuance of FDA Form 483 notices of 
observations, warning letters or sanctions being imposed on us, including clinical holds, fines, injunctions, civil penalties, delays, suspension or withdrawal 
of approvals, license revocation, seizures or recalls of product candidates or drugs, operating restrictions and criminal prosecutions, any of which could 
significantly and adversely affect supplies of our products. Any such failure by us or any of our suppliers or manufacturers would significantly impact our 
ability to develop, obtain regulatory approval for or, if approved, market our product candidates.

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

•

•

•

•

•

•

An inability to initiate or continue clinical trials of product candidates under development, which may impact our potential economic 
benefits; 

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

Loss of the cooperation of a collaborator; 

Subjecting our product candidates to additional inspections by regulatory authorities; 

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

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

We enter into various contracts in the normal course of our business in which we indemnify the other party to the contract. In the event we have to 
perform under these indemnification provisions, it could have a material adverse effect on our business, financial condition and results of operations. 

In the normal course of business, we periodically enter into academic, commercial, service, collaboration, licensing, consulting and other 

agreements that contain indemnification provisions. With respect to our academic and other research agreements, we typically indemnify the institution and 
related parties from losses arising from claims relating to the products, processes or services made, used, sold or performed pursuant to the agreements for 
which we have secured licenses, and from claims arising from our or our sublicensees’ exercise of rights under the agreement. With respect to our 
collaboration agreements, we typically indemnify our collaborators from any third-party product liability claims that could result from the production, use 
or consumption of the product, as well as for alleged infringements of any patent or other intellectual property right by a third-party. With respect to 
consulting agreements, we indemnify consultants from claims arising from the good faith performance of their services. 

Should our obligation under an indemnification provision exceed applicable insurance coverage or should we be denied insurance coverage, our 
business, financial condition and results of operations could be adversely affected. Similarly, if we are relying on a collaborator to indemnify us and the 
collaborator is denied insurance coverage or the indemnification obligation exceeds the 

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applicable insurance coverage, and if the collaborator does not have other assets available to indemnify us, our business, financial condition and results of 
operations could be adversely affected. 

To the extent we are able to enter into collaborative arrangements or strategic alliances, we may be exposed to risks related to those collaborations and 
alliances. 

Biotechnology companies sometimes become dependent upon collaborative arrangements or strategic alliances to complete the development and 

commercialization of product candidates. If we elect to enter into collaborative arrangements or strategic alliances, these arrangements may place the 
development of our product candidates outside our control, may require us to relinquish important rights or may otherwise be on terms unfavorable to us. 

Dependence on collaborative arrangements or strategic alliances would subject us to a number of risks, including the risk that: 

•

•

•

•

•

•

We may not be able to control the amount and timing of resources that our collaborators may devote to the relevant product candidates; 

Our collaborators may experience financial difficulties; 

We may be required to relinquish important rights, such as marketing and distribution rights; 

Business combinations or significant changes in a collaborator’s business strategy may also adversely affect a collaborator’s willingness or 
ability to complete our obligations under any arrangement; 

A collaborator could independently move forward with a competing drug candidate developed either independently or in collaboration with 
others, including our competitors; and 

Collaborative arrangements are often terminated or allowed to expire, which would delay the development and may increase the cost of 
developing our drug candidates. 

We may attempt to form collaborations in the future with respect to our product candidates, but we may not be able to do so, which may cause us to 
alter our development and commercialization plans. 

We may attempt to form strategic collaborations, create joint ventures or enter into licensing arrangements with third parties with respect to our 

programs or platform that we believe will complement or augment our existing business. We may face significant competition in seeking appropriate 
strategic collaborators, and the negotiation process to secure appropriate terms is time consuming and complex. We may not be successful in our efforts to 
establish such a strategic collaboration for any product candidates and programs on terms that are acceptable to us, or at all. This may be because our 
product candidates and programs may be deemed to be at too early of a stage of development for collaborative effort, our research and development 
pipeline may be viewed as insufficient, the competitive or intellectual property landscape may be viewed as too intense or risky, the macro-economic 
conditions may disfavor a collaboration, and/or third parties may not view our product candidates and programs as having sufficient potential for 
commercialization, including the likelihood of an adequate safety and efficacy profile. 

Any delays in identifying suitable collaborators and entering into agreements to develop and/or commercialize our product candidates could delay 

the development or commercialization of our product candidates, which may reduce their competitiveness even if they reach the market. Absent a strategic 
collaborator, we would need to undertake development and/or commercialization activities at our own expense. If we elect to fund and undertake 
development and/or commercialization activities on our own, we may need to obtain additional expertise and additional capital, which may not be available 
to us on acceptable terms or at all. If we are unable to do so, we may not be able to develop our product candidates or bring them to market and our 
business may be materially and adversely affected. 

Risks Related to Commercialization of Our Product Candidates 

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

We currently have no sales, marketing or distribution capabilities or experience. If any of our product candidates is approved for marketing and 

commercialization, we will need to develop internal sales, marketing and distribution capabilities to commercialize such products, which would be 
expensive and time-consuming, or enter into collaborations with third parties to perform these services. If we decide to market our products directly, we 
will need to commit significant financial and managerial resources to develop a marketing and sales force with technical expertise and supporting 
distribution, administration and compliance capabilities. If we rely on third parties with such capabilities to market our products or decide to co-promote 
products with collaborators, we will need to establish and maintain marketing and distribution arrangements with third parties, and there can be no 
assurance that we will be able to enter into such arrangements on acceptable terms or at all. In entering into third-party marketing or distribution 
arrangements, any revenue we receive will depend upon the efforts of third parties and there can be no assurance that such third 

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parties will establish adequate sales and distribution capabilities or be successful in gaining market acceptance of any approved product. If we are not 
successful in commercializing any product approved for marketing and commercialization in the future, either on our own or through third parties, our 
business, financial condition, results of operations and prospects may be adversely affected. 

If the market opportunities for our product candidates are smaller than we believe they are, we may not meet our revenue expectations and, assuming 
approval of a product candidate, our business may suffer. Because the patient populations in the market for our product candidates may be small, we 
must be able to successfully identify patients and acquire a significant market share to achieve profitability and growth. 

Our eligible patient population and pricing estimates may differ significantly from the actual market addressable by our product candidates. Our 

projections of both the number of people who have applicable diseases, as well as the subset of people with these diseases who have the potential to benefit 
from treatment with our product candidates, are based on our beliefs and estimates. These estimates have been derived from a variety of sources, including 
scientific literature, patient foundations, or market research, and may prove to be incorrect. Further, new studies may change the estimated incidence or 
prevalence of these diseases. The number of patients may turn out to be lower than expected. The potentially addressable patient population for each of our 
product candidates may be limited or may not be amenable to treatment with our product candidates, and new patients may become increasingly difficult to 
identify or gain access to, which would adversely affect our business, financial condition, results of operations and prospects. 

We face substantial competition and our competitors may discover, develop or commercialize products faster or more successfully than us. 

The development and commercialization of new products is highly competitive. We face competition from major pharmaceutical companies, 

specialty pharmaceutical companies, biotechnology companies, universities and other research institutions worldwide with respect to our product 
candidates that we may seek to develop or commercialize in the future.  Our competitors may succeed in developing, acquiring or licensing technologies 
and products that are more effective or less costly than the product candidates that we are currently developing or that we may develop, which could render 
our product candidates obsolete and noncompetitive. In addition to the competition, we face from alternative therapies for the diseases we intend to target 
with our product candidates, we are also aware of several companies that are also working specifically to develop engineered bacteria as cellular drug 
therapies. Further there are several companies working to develop other similar products. Third-party payors, including governmental and private insurers, 
may also encourage the use of generic products. 

If our competitors obtain marketing approval from the FDA or comparable foreign regulatory authorities for their product candidates more rapidly 

than us, it could result in our competitors establishing a strong market position before we are able to enter the market. 

Many of our competitors have materially greater name recognition and substantially greater financial, manufacturing, marketing, research and drug 

development resources than we do. Additional mergers and acquisitions in the biotechnology and pharmaceutical industries may result in even more 
resources being concentrated in our competitors. Large pharmaceutical companies in particular have extensive expertise in preclinical and clinical testing 
and in obtaining regulatory approvals for drugs. In addition, academic institutions, government agencies, and other public and private organizations 
conducting research may seek patent protection with respect to potentially competitive products or technologies. These organizations may also establish 
exclusive collaborative or licensing relationships with our competitors. Failure of our product candidates to effectively compete against established 
treatment options or in the future with new products currently in development would harm our business, financial condition, results of operations and 
prospects. 

We may expend our limited resources to pursue a particular product candidate or indication and fail to capitalize on product candidates or indications 
that may be more profitable or for which there is a greater likelihood of success.

Because we have limited financial and managerial resources, we have historically focused and may in the future focus on research programs, 

therapeutic platforms and product candidates that we identify for specific indications. As a result, we may forego or delay pursuit of opportunities with 
other therapeutic platforms or product candidates or for other indications that later prove to have greater commercial potential or a greater likelihood of 
success. Our resource allocation decisions may cause us to fail to capitalize on viable commercial products or profitable market opportunities. Our 
spending on current and future research and development programs, therapeutic platforms and product candidates for specific indications may not yield any 
commercially viable products. If we do not accurately evaluate the commercial potential or target market for a particular product candidate, we may 
relinquish valuable rights to that product candidate through collaboration, licensing or other royalty arrangements in cases in which it would have been 
more advantageous for us to retain sole development and commercialization rights.

The commercial success of any of our current or future product candidates will depend upon the degree of market acceptance by physicians, patients, 
third-party payors, and others in the medical community. 

Even with approvals from the FDA and comparable foreign regulatory authorities, the commercial success of our products will depend in part on the 

healthcare providers, patients, and third-party payors accepting our product candidates as medically useful, 

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cost-effective, and safe. Any product that we bring to the market may not gain market acceptance by physicians, patients and third-party payors. The degree 
of market acceptance of any of our products will depend on a number of factors, including but not limited to: 

•

•

•

•

•

•

•

•

•

•

•

The efficacy of the product as demonstrated in clinical trials and potential advantages over competing treatments; 

The safety and side effect profile of the product as demonstrated in clinical trials and potential advantages over competing treatments; 

The prevalence and severity of the disease targeted; 

The clinical indications for which approval is granted, including any limitations or warnings contained in a product’s approved labeling; 

The convenience and ease of administration; 

The cost of treatment;

The willingness of the patients and physicians to accept products engineered from bacteria and these therapies; 

The perceived ratio of risk and benefit of these therapies by physicians, patients, and payers, and the willingness of physicians to recommend 
these therapies to patients based on such risks and benefits; 

The marketing, sales and distribution support for the product; 

The publicity concerning the products or competing products and treatments; and 

The pricing and availability of third-party insurance coverage and reimbursement. 

Even if a product displays a favorable efficacy and safety profile upon approval, market acceptance of the product remains uncertain. Efforts to 

educate the medical community and third-party payors on the benefits of the products may require significant investment and resources and may never be 
successful. If our products fail to achieve an adequate level of acceptance by physicians, patients, third-party payors, and other healthcare providers, we 
will not be able to generate sufficient revenue to become or remain profitable. 

We may not be successful in any efforts to identify, license, discover, develop, or commercialize additional product candidates. 

The success of our business is expected to depend largely upon our ability to identify, license, discover, develop, or commercialize additional 
product candidates. Research programs to identify new product candidates require substantial technical, financial, and human resources. We may focus our 
efforts and resources on potential programs or product candidates that ultimately prove to be unsuccessful. Our research programs or licensing efforts may 
fail to yield additional product candidates for clinical development and commercialization for a number of reasons, including but not limited to the 
following: 

•

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•

•

•

•

•

•

•

Our research or business development methodology or search criteria and process may be unsuccessful in identifying potential product 
candidates; 

We may not be able or willing to assemble sufficient resources to acquire or discover additional product candidates; 

Our product candidates may not succeed in preclinical or clinical testing; 

Our potential product candidates may be shown to have harmful side effects or may have other characteristics that may make the products 
unmarketable or unlikely to receive marketing approval; 

Competitors may develop alternatives that render our product candidates obsolete or less attractive; 

Product candidates we develop may be covered by third parties’ patents or other exclusive rights; 

The market for a product candidate may change during development or commercialization so that such a product may become unreasonable 
to continue to develop or commercialize;

A product candidate may not be capable of being produced in commercial quantities at an acceptable cost, or at all; and 

A product candidate may not be accepted as safe and effective by patients, the medical community, or third-party payors. 

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If any of these events occur, we may be forced to abandon our development efforts for one or more product candidates, or we may not be able to 

identify, license, discover, develop, or commercialize additional product candidates, which would have a material adverse effect on our business, financial 
condition or results of operations and could potentially cause us to cease operations. 

Failure to obtain or maintain adequate reimbursement or insurance coverage for products, if any, could limit our ability to market those products and 
decrease our ability to generate revenue. 

The pricing, coverage, and reimbursement of our approved products, if any, must be sufficient to support our commercial efforts and other 

development programs and the availability and adequacy of coverage and reimbursement by third-party payors, including governmental and private 
insurers, are essential for most patients to be able to afford expensive treatments. Sales of our approved products, if any, will depend substantially, both 
domestically and abroad, on the extent to which the costs of our approved products, if any, will be paid for or reimbursed by health maintenance, managed 
care, pharmacy benefit and similar healthcare management organizations, or government payors and private payors. If coverage and reimbursement are not 
available, or are available only in limited amounts, we may have to subsidize or provide products for free or we may not be able to successfully 
commercialize our products. 

In addition, there is significant uncertainty related to the insurance coverage and reimbursement for newly approved products. In the United States, 

the principal decisions about coverage and reimbursement for new drugs are typically made by CMS, an agency within DHHS, as CMS decides whether 
and to what extent a new drug will be covered and reimbursed under Medicare. Private payors tend to follow the coverage reimbursement policies 
established by CMS to a substantial degree. It is difficult to predict what CMS will decide with respect to reimbursement for novel product candidates such 
as ours and what reimbursement codes our product candidates may receive if approved. No uniform policy for coverage and reimbursement for drug 
products exist among third-party payors in the United States. Therefore, coverage and reimbursement for drug products can differ significantly from payor 
to payor. As a result, the coverage determination process is often a time-consuming and costly process that will require us to provide scientific and clinical 
support for the use of our products to each payor separately, with no assurance that coverage and adequate reimbursement will be applied consistently or 
obtained in the first instance. Furthermore, rules and regulations regarding reimbursement change frequently, in some cases at short notice, and we believe 
that changes in these rules and regulations are likely.

Third-party payors increasingly are challenging prices charged for pharmaceutical products and services, and many third-party payors may refuse to 
provide coverage and reimbursement for particular drugs when an equivalent generic/biosimilar drug or a less expensive therapy is available. It is possible 
that a third-party payor may consider our product candidate and other therapies as substitutable and only offer to reimburse patients for the less expensive 
product. Even if we show improved efficacy or improved convenience of administration with our product candidate over other available and comparable 
products, pricing of existing drugs may limit the amount we will be able to charge for its product candidate. These payors may deny or revoke the 
reimbursement status of a given drug product or establish prices for new or existing marketed products at levels that are too low to enable it to realize an 
appropriate return on our investment in product development. If coverage and reimbursement is not available or is available only at limited levels, we may 
not be able to successfully commercialize our product candidates and may not be able to obtain a satisfactory financial return on products that we may 
develop. 

For products administered under the supervision of a physician, obtaining coverage and adequate reimbursement may be particularly difficult 
because of the higher prices often associated with such drugs. Additionally, separate reimbursement for the product itself or the treatment or procedure in 
which the product is used may not be available, which may impact physician utilization. For example, under these circumstances, physicians may limit how 
much or under what circumstances they will prescribe or administer our products and patients may deliver to purchase such products. This, in turn, could 
affect our ability to commercialize our products successfully and impact our profitability, results of operations, financial condition, and future success.

Outside the United States, international operations are generally subject to extensive governmental price controls and other price-restrictive 
regulations, and we believe the increasing emphasis on cost-containment initiatives in Europe, Canada, and other countries has and will continue to put 
pressure on the pricing and usage of products. In many countries, the prices of products are subject to varying price control mechanisms as part of national 
health systems. Other countries allow companies to fix their own prices for medical products but monitor and control company profits. Price controls or 
other changes in pricing regulation could restrict the amount that we are able to charge for our products, if any. Accordingly, in markets outside the United 
States, the potential revenue from the sale of our products may be insufficient to generate commercially reasonable revenue and profits. 

Moreover, increasing efforts by governmental and private payors in the United States and abroad to limit or reduce healthcare costs may result in 

restrictions on coverage and the level of reimbursement for new products and, as a result, they may not cover or provide adequate payment for our 
products. We expect to experience pricing pressures in connection with products due to the increasing trend toward managed healthcare, including the 
increasing influence of health maintenance organizations and additional legislative changes. The downward pressure on healthcare costs in general, 
particularly on prescription drugs, has increased and is expected to continue to increase in the future. As a result, profitability of our products, if any, may 
be more difficult to achieve even if they receive regulatory approval. 

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Our future product candidates for which we obtain approval may face competition sooner than anticipated.

Even if we are successful in achieving regulatory approval to commercialize a product candidate ahead of our competitors, our product candidates 

may face competition from biosimilar products. In the United States, Synthetic Biotic products are expected to be regulated by the FDA as biological 
products and we intend to seek approval for these product candidates pursuant to the BLA pathway. The BPCIA created an abbreviated pathway for FDA 
approval of biosimilar and interchangeable biological products based on a previously licensed reference product. Under the BPCIA, an application for a 
biosimilar biological product cannot be approved by the FDA until 12 years after the original reference biological product was approved under a BLA. 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.

We believe that any of our product candidates approved as a biological product under a BLA should qualify for the 12-year period of exclusivity 

available to reference biological products. However, there is a risk that this exclusivity could be shortened due to congressional action or otherwise, or that 
the FDA will not consider our product candidates to be reference biological products pursuant to its interpretation of the exclusivity provisions of the 
BPCIA for competing products, potentially creating the opportunity for generic follow-on biosimilar competition sooner than anticipated. Moreover, the 
extent to which a biosimilar product, once approved, will be substituted for any one of our reference products in a way that is similar to traditional generic 
substitution for non-biological products is not yet clear, and will depend on a number of marketplace and regulatory factors that are still developing 
including whether a future competitor seeks an interchangeability designation for a biosimilar of one of our products. Under the BPCIA as well as state 
pharmacy laws, only interchangeable biosimilar products are considered substitutable for the reference biological product without the intervention of the 
healthcare provider who prescribed the original biological product. However, as with all prescribing decisions made in the context of a patient-provider 
relationship and a patient’s specific medical needs, healthcare providers are not restricted from prescribing biosimilar products in an off-label manner. In 
addition, a competitor could decide to forego the abbreviated approval pathway available for biosimilar products and to submit a full BLA for product 
licensure after completing its own preclinical studies and clinical trials. In such a situation, any exclusivity to which we may be eligible under the BPCIA 
would not prevent the competitor from marketing its biological product as soon as it is approved.

Furthermore, the CREATES Act established a private cause of action that permits a follow-on product developer to sue the brand manufacturer to 

compel it to furnish necessary samples of a reference product on “commercially reasonable, market-based terms.” If follow-on product developers request 
samples of any product candidates for which we receive marketing approval in order to conduct comparative testing to support one or more applications for 
a follow-on version of our products, and we refuse any such request, we may be subject to litigation under the CREATES Act. Although lawsuits have been 
filed under the CREATES Act since its enactment, those lawsuits have settled privately; therefore, to date, no federal court has reviewed or opined on the 
statutory language and there continues to be uncertainty regarding the scope and application of the law.

In Europe, the European Commission has granted marketing authorizations for several biosimilar products pursuant to a set of general and product 

class-specific guidelines for biosimilar approvals issued over the past few years. In addition, companies may be developing biosimilar products in other 
countries that could compete with our products, if approved.

If competitors are able to obtain marketing approval for biosimilars referencing our product candidates, if approved, our future products may 
become subject to competition from such biosimilars, whether or not they are designated as interchangeable, with the attendant competitive pressure and 
potential adverse consequences. Such competitive products may be able to immediately compete with us in each indication for which our product 
candidates may have received approval.

Risks Related to Our Business Operations and Employees 

Our failure to attract and retain senior management and key scientific personnel may prevent us from successfully developing our product candidates 
or any future product candidate, conducting our clinical trials and commercializing any products. 

Our success depends in part on our ability to attract, retain and motivate highly qualified management, clinical and scientific personnel. Although 

we have not historically experienced significant difficulties attracting and retaining qualified employees, we could experience such problems in the future. 
For example, competition for qualified personnel in the biotechnology and pharmaceuticals field is intense due to the limited number of individuals who 
possess the skills and experience required by our industry. We will need to hire additional personnel as we expand our clinical development and 
commercial activities. We may not be able to attract and retain quality personnel on acceptable terms, or at all. Many of the other biotechnology companies 
that we compete against for qualified personnel have greater financial and other resources, different risk profiles and a longer history in the industry than 
we do. They also may provide more diverse opportunities and better prospects for career advancement. Some of these characteristics may be more 
appealing to high-quality candidates than what we have to offer. If we are unable to continue to attract and retain high-quality personnel, the rate and 
success at which we can discover, develop and commercialize our product candidates will be limited and the potential for successfully growing our 
business will be harmed.

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Our employees, independent contractors, principal investigators, CROs, consultants and collaborators may engage in misconduct or other improper 
activities, including noncompliance with regulatory standards and requirements and insider trading. 

We are exposed to the risk that our employees, independent contractors, consultants and collaborators may engage in fraudulent conduct or other 

illegal activity. Misconduct by these parties could include intentional, reckless and/or negligent conduct or unauthorized activities that violate: (1) 
regulations of regulatory authorities in jurisdictions where we are performing activities in relation to our product candidates, including those laws requiring 
the reporting of true, complete and accurate information to such authorities; (2) manufacturing regulations and standards; (3) fraud and abuse and anti-
corruption laws and regulations; or (4) laws that require the reporting of true and accurate financial information and data. In particular, sales, marketing and 
business arrangements in the healthcare industry are subject to extensive laws and regulations intended to prevent fraud, bias, misconduct, kickbacks, self-
dealing and other abusive practices, and these laws may differ substantially from country to country. These laws and regulations may restrict or prohibit a 
wide range of pricing, discounting, marketing and promotion, sales commission, customer incentive programs and other business arrangements. These 
activities also include the improper use of information obtained in the course of clinical trials, which could result in regulatory sanctions and serious harm 
to our reputation. It is not always possible to identify and deter misconduct by employees and other third parties, 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 ourselves from governmental investigations 
or other actions or lawsuits stemming from a failure to be in compliance with such laws or regulations. If any such actions are instituted against us, and we 
are not successful in defending itself or asserting our rights, those actions could have a significant impact on our business including the imposition of 
significant civil, criminal and administrative penalties, damages, monetary fines, possible exclusion from participation in subsidized healthcare programs in 
a given country, contractual damages, reputational harm, diminished profits and future earnings, and curtailment of our operations, any of which could 
adversely affect our ability to operate our business and our results of operations. 

Risks Related to Our Common Stock 

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

Based on the beneficial ownership of our common stock as of March 12, 2024, our executive officers and directors, together with holders of 5% or 
more of our common stock outstanding and their respective affiliates, beneficially own the majority of our common stock. Accordingly, these stockholders 
have significant influence over the outcome of corporate actions requiring stockholder approval, including the election of directors, consolidation or sale of 
all or substantially all of our assets or any other significant corporate transaction. The interests of these stockholders may not be the same as or may even 
conflict with your interests. For example, these stockholders could delay or prevent a change of control, even if such a change of control would benefit our 
other stockholders, which could deprive our stockholders of an opportunity to receive a premium for their common stock as part of a sale of the company 
or our assets and might affect the prevailing market price of our common stock. The significant concentration of stock ownership may adversely affect the 
trading price of our common stock due to investors’ perception that conflicts of interest may exist or arise. 

Future sales of our common stock or securities convertible or exchangeable for our common stock may depress our stock price. 

If our existing stockholders or holders of our options sell, or indicate an intention to sell, substantial amounts of our common stock in the public 

market, the trading price of our common stock could decline. The perception in the market that these sales may occur could also cause the trading price of 
our common stock to decline. As of March 12, 2024, there were a total of 11,646,977 shares of our common stock outstanding.  We have also registered 
and intend to continue to register all shares of common stock that we may issue under our equity compensation plans. Once we register these shares, they 
can be freely sold in the public market upon issuance, subject to volume limitations applicable to affiliates and vesting provisions, as applicable.

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

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

including: 

•

•

•

Variations in the level of our operating expenses; 

Receipt, modification or termination of government contracts or grants, and the timing of payments we receive under these arrangements; 

Our execution of any collaborative, licensing or similar arrangements, and the timing of payments we may make under these arrangements; 
and 

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•

Any intellectual property infringement lawsuit or opposition, interference or cancellation proceeding in which we may become involved. 

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 the company’s stock to fluctuate substantially. 
We believe that quarterly comparisons of our financial results are not necessarily meaningful and should not be relied upon as an indication of our future 
performance. 

Provisions of our charter documents or Delaware law could delay or prevent an acquisition of us, even if the acquisition would be beneficial to our 
stockholders and could make it more difficult for you to change management. 

Provisions in our amended and restated certificate of incorporation and our amended and restated bylaws may discourage, delay or prevent a merger, 

acquisition or other change in control that our stockholders may consider favorable, including transactions in which our stockholders might otherwise 
receive a premium for their shares. In addition, these provisions may frustrate or prevent any attempt by our stockholders to replace or remove our current 
management by making it more difficult to replace or remove our Board of Directors. These provisions include: 

•

•

•

•

•

•

•

•

A classified board of directors so that not all directors are elected at one time; 

A prohibition on stockholder action through written consent; 

No cumulative voting in the election of directors; 

The exclusive right of our Board of Directors to elect a director to fill a vacancy created by the expansion of our Board of Directors or the 
resignation, death or removal of a director; 

A requirement that special meetings of our Stockholders be called only by our Board of Directors, the chairman of our Board of Directors, 
the chief executive officer or, in the absence of a chief executive officer, the president; 

An advance notice requirement for stockholder proposals and nominations; 

The authority of our Board of Directors to issue preferred stock with such terms as our Board of Directors may determine; and 

A requirement of approval of not less than 66 2/3% of all outstanding shares of our capital stock entitled to vote to amend any bylaws by 
stockholder action, or to amend specific provisions of our certificate of incorporation. 

In addition, Delaware law prohibits a publicly held Delaware corporation from engaging in a business combination with an interested stockholder, 
generally a person who, together with its affiliates, owns or within the last three years has owned 15% or more of the company’s voting stock, for a period 
of three years after the date of the transaction in which the person became an interested stockholder, unless the business combination is approved in a 
prescribed manner. Accordingly, Delaware law may discourage, delay or prevent a change in control of the company. 

In addition, our amended and restated certificate of incorporation, to the fullest extent permitted by law, 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 Delaware General Corporation Law, or the DGCL, our amended and restated certificate 
of incorporation, or our amended and restated bylaws; or any action asserting a claim against us that is governed by the internal affairs doctrine. This 
exclusive forum provision does not apply to suits brought to enforce a duty or liability created by the Exchange Act. It could apply, however, to a suit that 
falls within one or more of the categories enumerated in the exclusive forum provision and asserts claims under the Securities Act, inasmuch as Section 22 
of the Securities Act creates concurrent jurisdiction for federal and state courts over all suits brought to enforce any duty or liability created by the 
Securities Act or the rule and regulations thereunder. There is uncertainty as to whether a court would enforce such provision with respect to claims under 
the Securities Act, and our stockholders will not be deemed to have waived our compliance with the federal securities laws and the rules and regulations 
thereunder.

This choice of forum provision may limit a stockholder’s ability to bring a claim in a judicial forum that it finds favorable for disputes with us or 

any of our directors, officers, or other employees, which may discourage lawsuits with respect to such claims. Alternatively, if a court were to find the 
choice of forum provisions contained in our restated certificate of incorporation to be inapplicable or unenforceable in an action, we may incur additional 
costs associated with resolving such action in other jurisdictions, which could harm our business, results of operations and financial condition.

Provisions in our charter and other provisions of Delaware law could limit the price that investors are willing to pay in the future for shares of our 

common stock. 

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If securities or industry analysts do not publish research, or publish inaccurate or unfavorable research, about our business, our stock price and 
trading volume could decline. 

The trading market for our common stock will depend, in part, on the research and reports that securities or industry analysts publish about us or our 

business. If one or more of the analysts who cover us downgrade our common stock or publish inaccurate or unfavorable research about our business, our 
stock price would likely decline. In addition, if our operating results fail to meet the forecast of analysts, our stock price would likely decline. If one or 
more of these analysts cease coverage of us or fail to publish reports on us regularly, demand for our common stock could decrease, which might cause our 
stock price and trading volume to decline. 

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

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

and related expenses and accounting for stock-based compensation, are subject to further review, interpretation and guidance from relevant accounting 
authorities, including the SEC. Changes to, or interpretations of, accounting methods or policies may require us to reclassify, restate or otherwise change or 
revise our financial statements, including those contained in this periodic report. 

We will continue to incur costs as a result of being a public company, and our management will continue to devote substantial time to compliance 
initiatives and corporate governance practices.

As a public company, we have incurred and will continue to incur significant legal, accounting and other expenses. The Sarbanes-Oxley Act of 
2002, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of The Nasdaq Capital Market and other applicable 
securities rules and regulations impose various requirements on public companies, including establishment and maintenance of effective disclosure and 
financial controls and corporate governance practices. Our management and other personnel devote and will need to continue to devote a substantial 
amount of time to these compliance initiatives. Moreover, these rules and regulations have increased and will continue to increase our legal and financial 
compliance costs and make some activities more time-consuming and costly. For example, we expect that these rules and regulations will continue to make 
it more difficult and more expensive for us to maintain director and officer liability insurance, which in turn could make it more difficult for us to attract 
and retain qualified members of our board of directors.

These rules and regulations are often subject to varying interpretations, in many cases due to their lack of specificity, and, as a result, their 

application in practice may evolve over time as new guidance is provided by regulatory and governing bodies. This could result in future uncertainty 
regarding compliance matters and higher costs necessitated by ongoing revisions to disclosure and governance practices.

If we fail to comply with the continued listing requirements of the Nasdaq Capital Market, our common stock may be delisted and the price of our 
common stock and our ability to access the capital markets could be negatively impacted.  

Our common stock is currently listed on the Nasdaq Capital Market and was previously listed on the Nasdaq Global Market. To maintain the listing 
of our common stock on the Nasdaq Global Market, we were required to satisfy minimum financial and other continued listing requirements and standards, 
including those related to the price of our common stock. On December 6, 2022, we received a written notice from the Listing Qualifications Department 
of the Nasdaq Stock Market (Nasdaq) notifying us that, based on the closing bid price of our common stock being below $1.00 per share for 30 consecutive 
business days, we no longer complied with Nasdaq’s minimum bid price requirement in Listing Rule 5450(a)(1) for continued listing on the Nasdaq Global 
Market.

Pursuant to Nasdaq Listing Rule 5810(c)(3)(A), we were provided an initial compliance period of 180 calendar days from receipt of the Notice, or 

until June 5, 2023, to regain compliance with the minimum bid price requirement. To regain compliance, the bid price for our common stock would need to 
close at $1.00 per share or more for a minimum of 10 consecutive business days during this 180-day grace period, among other requirements.

On May 25, 2023, we submitted to the Listing Qualifications Department of Nasdaq an application to transfer the listing of our common stock from 

The Nasdaq Global Market to The Nasdaq Capital Market. On June 6, 2023, we received a notice (Extension Notice) from the Listing Qualifications 
Department informing us that Nasdaq granted us an additional 180 calendar days, or until December 4, 2023 to regain compliance with the minimum 
closing bid price requirement for continued listing on The Nasdaq Capital Market under Nasdaq Marketplace Rule 5550(a)(2). In connection with the 
Extension Notice, the listing of our common stock was transferred from the Nasdaq Global Market to the Nasdaq Capital Market, effective as of June 7, 
2023. The Extension Notice had no other immediate effect on the listing of our common stock.

On September 27, 2023, we implemented a reverse stock split of our shares of common stock, pursuant to which every fifteen (15) shares of our 

issued and outstanding common stock was automatically converted into one (1) issued and outstanding share of 

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common stock without any change in the par value of $0.001 per share. The reverse stock split was approved by our stockholders on September 21, 2023 at 
our Special Meeting of stockholders. 

On October 13, 2023, we received a written notice from the Listing Qualifications Department of Nasdaq notifying us that we had regained 
compliance with Listing Rule 5550(a)(2) and that this matter was closed. However, there can be no assurance that we will comply with the minimum bid 
price requirement in the future nor, is there any assurance that our common stock would never be delisted from Nasdaq at some future date. If our common 
stock were to be delisted from Nasdaq and is not eligible for quotation or listing on another market or exchange, trading of our common stock could be 
conducted only in the over-the-counter market or on an electronic bulletin board established for unlisted securities such as the Pink Sheets or the OTC 
Bulletin Board. In such event, it could become more difficult to dispose of, or obtain accurate price quotations for, our common stock, and there would 
likely also be a reduction in our coverage by securities analysts and the news media, which could cause the price of our common stock to decline further. 
Also, it may be difficult for us to raise additional capital if we are not listed on a major exchange.

Item 1B. Unresolved Staff Comments. 

None.

Item 1C. Cybersecurity.

We recognize the critical importance of maintaining the trust and confidence of patients, business partners and employees toward our business and 

are committed to protecting the confidentiality, integrity and availability of our business operations and systems. Our board of directors is actively involved 
in oversight of our risk management activities, and cybersecurity represents an important element of our overall approach to risk management. In general, 
we seek to address cybersecurity risks through a cross-functional approach that is focused on preserving the confidentiality, security and availability of the 
information that we collect and store by identifying, preventing and mitigating cybersecurity threats and effectively responding to cybersecurity incidents 
when they occur.

Cybersecurity Risk Management and Strategy; Effect of Risk

We face risks related to cybersecurity such as unauthorized access, cybersecurity attacks and other security incidents, including as perpetrated by 

hackers and unintentional damage or disruption to hardware and software systems, loss of data, and misappropriation of confidential information. To 
identify and assess material risks from cybersecurity threats, we maintain a comprehensive cybersecurity program and work with a third party managed 
service provider to ensure our systems are effective and prepared for information security risks, including regular oversight of our programs for security 
monitoring for internal and external threats to ensure the confidentiality and integrity of our information assets. We consider risks from cybersecurity 
threats alongside other company risks as part of our overall risk assessment process. We and our third-party partners employ a range of tools and services, 
including regular network and endpoint monitoring and protection, audits, vulnerability assessments, and penetration testing, to inform our risk 
identification and assessment. As discussed in more detail under “Cybersecurity Governance” below, our audit committee provides oversight of our 
cybersecurity risk management and strategy processes, which are led by our Chief Operating Officer.

We also identify our cybersecurity threat risks by using the services of a managed services provider. To provide for the availability of critical data 

and systems, maintain regulatory compliance, manage our material risks from cybersecurity threats, and protect against and respond to cybersecurity 
incidents, we undertake the following activities:

•

•

•

•

•

monitor as appropriate emerging data protection laws and industry literature and implement changes to our processes that are designed to 
comply with such laws if needed;

through our policies, practices and contracts (as applicable), require employees, as well as third parties that provide services on our behalf, to 
treat confidential information and data with care;

employ technical safeguards that are designed to protect our information systems from cybersecurity threats, including redundant firewalls, 
intrusion prevention and detection systems, multi-factor authentication, encryption, anti-malware functionality and access controls;

provide  annual  and  routine  mandatory  training  utilizing  Knowbe4  (leading  security  awareness  training  module)  for  our  employees  and 
contractors  regarding  cybersecurity  threats  as  a  means  to  equip  them  with  effective  tools  to  address  cybersecurity  threats,  and  to 
communicate our evolving information security policies, standards, processes and practices;

conduct phishing email simulations for employees and contractors with access to our email systems to enhance awareness and responsiveness 
to possible threats;

75

 
 
 
 
 
 
 
•

•

utilize a managed services provider to help us identify, protect, detect, respond and recover when there is an actual or potential cybersecurity 
incident; and

carry information security risk insurance that provides protection against the potential losses arising from a cybersecurity incident

Our incident response plan coordinates the activities we, in concert with our third party managed services provider, take to prepare for, detect, 
respond to and recover from cybersecurity incidents, which include processes to triage, assess severity for, escalate, contain, investigate and remediate the 
incident, as well as to comply with potentially applicable legal obligations and mitigate damage to our business and reputation.

Our processes also address cybersecurity threat risks associated with our use of third-party service providers, including our suppliers and 

manufacturers or who have access to patient and employee data or our systems. In addition, cybersecurity considerations affect the selection and oversight 
of our third-party service providers. We perform diligence on third parties that have access to our systems, data or facilities that house such systems or data, 
including through vendor security questionnaires as appropriate.

We describe whether and how risks from identified cybersecurity threats, including as a result of any previous cybersecurity incidents, have 
materially affected or are reasonably likely to materially affect us, including our business strategy, results of operations, or financial condition, under the 
heading “Our internal computer systems, or those of our collaborators or other contractors or consultants, may fail or suffer cybersecurity incidents, 
which could result in a material disruption of our product development programs,” which disclosures are incorporated by reference herein. In the last three 
fiscal years, we have not experienced any material cybersecurity incidents.

Cybersecurity Governance; Management

Cybersecurity is an important part of our risk management processes and an area of focus for our board of directors and management. Our board of 

directors executes its oversight responsibility for risk management both directly and through delegating oversight of certain of these risks to its committees, 
and our board of directors has authorized our audit committee to oversee risks from cybersecurity threats. 

At least annually and on a periodic basis, our audit committee receives an update from management on our cybersecurity threat risk management 
and strategy processes and generally receives materials on our ability to mitigate current and emerging risks, and discusses such matters with our Chief 
Operating Officer. Our processes require that our audit committee is designated to receive prompt and timely information regarding any cybersecurity 
incident that meets establishing reporting thresholds, as well as ongoing updates regarding any such incident until it has been addressed. 

Our cybersecurity risk management and strategy processes, which are discussed in greater detail above, are led by our Chief Operating Officer. This 

individual has over twenty years of prior work experience in various roles involving managing information security, developing cybersecurity strategy, 
implementing effective information and cybersecurity programs. The Chief Operating Officer, along with the Company’s managed services provider, are 
informed about and monitor the prevention, mitigation, detection, and remediation of cybersecurity incidents through their management of, and 
participation in, the cybersecurity risk management and strategy processes described above, including the operation of our incident response plan. As 
discussed above, the Chief Operating Officer reports to the audit committee of our board of directors about cybersecurity threat risks, among other 
cybersecurity related matters, at least annually.

Item 2. Properties.

Our corporate headquarters and operations are located in Cambridge, Massachusetts. We currently lease laboratory and office space at 301 Binney 
Street in Cambridge. Our 301 Binney Street lease expires in 2028. We believe that our facilities are suitable and adequate for our needs for the foreseeable 
future.

Item 3. Legal Proceedings. 

From time to time, we are subject to various legal proceedings, claims and administrative proceedings that arise in the ordinary course of our 
business activities. Although the results of the litigation and claims cannot be predicated with certainty, as of the date of this report, we do not believe we 
are party to any claim, proceeding or litigation the outcome of which, if determined adversely to us, would individually or in the aggregate be reasonably 
expected to have a material adverse effect on our business. Regardless of the outcome, litigation can have an adverse impact on us because of defense and 
settlement costs, diversion of management resources and other factors.

76

 
 
 
 
 
 
 
 
Item 4. Mine Safety Disclosures.

Not applicable.

77

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

Market Information

Our common stock has been traded on The Nasdaq Capital Market under the symbol “SYBX” since August 28, 2017, prior to which it was traded 

PART II

under the symbol “MIRN”. 

Stockholders

As of March 12, 2024, there were approximately 68 stockholders of record of our common stock.

Dividends

We have never declared or paid any dividends to our stockholders since our inception, and we do not plan to declare or pay cash dividends in the 

foreseeable future. We currently anticipate that we will retain any future earnings for the operation and expansion of our business.

Unregistered Sales of Equity Securities and Use of Proceeds

None. 

Issuer Purchases of Equity Securities

There were no repurchases of common stock during the quarter ended December 31, 2023.

Item 6. [Reserved.]

78

 
 
 
 
 
 
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations. 

Forward-Looking Information

The Risk Factors in Part I, Item 1A of this Annual Report on Form 10-K, the audited financial statements and accompanying notes, included elsewhere in 
this Annual Report on Form 10-K, and this Management's Discussion and Analysis of Financial Condition and Results of Operations should be read 
together. In addition to historical information, this discussion and analysis contains forward-looking statements within the meaning of Section 27A of the 
Securities Act, and Section 21E of the Exchange Act. Operating results are not necessarily indicative of results that may occur for the full fiscal year or any 
other future period. 

Overview 

We are a biopharmaceutical company advancing novel therapeutics to transform the care of serious diseases. We focus on rare metabolic disorders, 
with our lead program, labafenogene marselecobac (SYNB1934), studied in Synpheny-3, a global, pivotal Phase 3 study for patients with phenylketonuria 
(PKU), and SYNB1353, a potential treatment for homocystinuria (HCU). Both PKU and HCU are caused by inborn errors of metabolism, and present 
significant need for innovation due to limitations of both efficacy and safety in the currently available medical treatment options.  

 In February 2024, we made the decision to discontinue Synpheny-3, our pivotal study of our lead product candidate, labafenogene marselecobac 

(SYNB1934), as a potential treatment for PKU.  The decision to end Synpheny-3 is based on results of an internal review in advance of an upcoming 
independent Data Monitoring Committee (DMC) assessment, which indicated the trial was unlikely to meet its primary endpoint. The decision was not 
based on concerns regarding safety or tolerability. We will now work with the Synpheny-3 clinical trial sites involved to implement the discontinuation. As 
a result, our current corporate strategy is focused on pursuing strategic initiatives to enhance stockholder value, including but not limited to, a merger or the 
sale of the Company. Our strategic process is both active and ongoing and includes a range of interactions with transaction counterparties. Thus, we believe 
it is in our stockholders’ best interest to allow sufficient opportunity to pursue and consummate one or more such transactions and to consider additional 
alternatives that may materialize in the future. However, there can be no assurance that such activities will result in any agreements or transactions that will 
enhance shareholder value. Further, any strategic transaction that is completed ultimately may not deliver the anticipated benefits or enhance shareholder 
value.

Our early-stage pipeline includes product candidates for enteric hyperoxaluria, gout, and cystinuria, and has been fueled by a reproducible, 
proprietary approach that creates GI-restricted, oral medicines with new enzymatic pathways designed to consume or produce specific biological targets.  
We design, develop and manufacture these drug candidates, which are produced by applying genetic engineering to well-characterized probiotics.  

 Our drug candidates are designed through precise engineering to target validated biological pathways in the pathophysiology of a given disease. By 

using a probiotic to deliver these new enzymatic pathways, the activity is restricted to the gastrointestinal (GI) tract, avoiding systemic exposure and 
associated risks that limit the success of other modalities.  Our pipeline programs are all based on the same probiotic Escherichia coli Nissle 1917, which 
provides synergies across programs, as well as more than one hundred years of human dosing experience.  Our drug candidates are engineered to be non-
colonizing, and fully reversible via GI clearance. These potential biopharmaceuticals are all orally administered, conducive to straightforward shipping, 
distribution and storage. For manufacturing, our platform leverages processes with familiar foundations, including fermentation and lyophilization, 
facilitating process design and scale-up, combined with unique and proprietary innovations tailored to our unique products.

Since our founding, based upon technology from the Massachusetts Institute of Technology (MIT) in 2014, we have progressed a pipeline of 

multiple drug candidates across different stages, including:

•

•

•

•

•

Labafenogene marselecobac (SYNB1934), which was being studied in Synpheny-3, a pivotal, Phase 3 study for the treatment of patients with 
PKU;

SYSYNB1353, a potential treatment for HCU, has achieved proof of mechanism in a Phase 1 study in healthy volunteers;

Preclinical research activities on a potential drug candidate for cystinuria, a rare, genetic cause of recurrent kidney stones which is also 
caused by an underlying metabolic disorder;

SYNB2081, a drug candidate for gout which is in IND-enabling studies; and 

Preclinical research focused on novel, locally-acting, GI-restricted biotherapeutics for indications in inflammatory bowel disease (IBD). 

Our Pipeline: Synthetic Biotics in Clinical Development

Our product pipeline consists of drug candidates targeting significant medical needs caused by an underlying metabolic disorder. These include 

labafenogene marselecobac, which was being evaluated in a pivotal, Phase 3 study in PKU, and drug 

79

 
 
candidates designed to treat HCU, enteric hyperoxaluria, and gout. Our preclinical work includes additional metabolic disease research, including 
cystinuria, target exploration, and focused research efforts in IBD.

Business Overview

We currently operate in one reportable business segment—the discovery and development of Synthetic Biotics. To date, we have dedicated 
substantially all of our activities to the research and development of our product candidates. We have funded our operations to date primarily with proceeds 
from the sale of preferred stock, common stock, preferred units, warrants, payments received under the Roche Collaboration and Option agreement, prior 
collaborations, interest earned on investments, and cash received in the Merger. 

We have not generated any revenue to date from product sales and have incurred significant operating losses since our inception. We have incurred 
net losses of approximately $57.3 million and $66.1 million for the years ended December 31, 2023 and 2022, respectively. As of December 31, 2023 and 
2022, we had an accumulated deficit of approximately $414.3 million and $357.0 million, respectively, and we expect to incur losses for the foreseeable 
future as we develop our product candidates. Historically, our expenses and capital requirements have increased substantially in connection with our 
research and development activities, as we:

•

•

•

Completed preclinical studies, initiated and completed clinical trials for product candidates;

Contracted to manufacture product candidates;

Advanced research and development related activities to expand our product pipeline;

• Maintained, expanded and protected our intellectual property portfolio;

•

•

•

Hired additional staff, including clinical, scientific, commercial and management personnel;

Expanded our existing infrastructure and secure space in a facility to support continued growth in our research and development efforts; and

Added operational and finance personnel to support product development efforts and to support operating as a public company.

We do not expect to generate product revenue unless and until we successfully complete clinical development and obtain regulatory approvals for 

our product candidates, either alone or in collaboration with third parties. Additionally, we expect to utilize third-party contract research organizations 
(CROs) and contract manufacturing organizations (CMOs) to carry out our clinical development and manufacturing activities, and we do not yet have a 
commercial organization. If we obtain regulatory approval for any of our product candidates, we expect to incur significant expenses related to developing 
our internal commercialization capability to support product sales, marketing and distribution. Accordingly, we anticipate that we will seek to fund our 
operations through public or private equity or debt financings, collaborations or licenses, finance lease transactions or other available financing 

80

 
 
 
 
transactions. However, we may be unable to raise additional funds through these or other means when needed. Because of the numerous risks and 
uncertainties associated with product development, we are unable to predict the timing or amount of increased expenses or when or if it will be able to 
achieve or maintain profitability. Even if we are able to generate product revenue, we may not become profitable. 

Effects of Inflation

We do not believe that inflation has had a material impact on our business or operating results during the periods presented. However, inflation has 

had, and may continue to have, an impact on the labor costs we incur to attract and retain qualified personnel, costs to conduct clinical trials and other 
operational costs. Inflationary costs could adversely affect our business, financial condition and results of operations. In addition, increased inflation has 
had, and may continue to have, an effect on interest rates. Increased interest rates may adversely affect our borrowing rate and our ability to obtain, or the 
terms under which we can obtain, any potential additional funding.

Financial Overview

Revenue

Revenue for the year ended December 31, 2023 was generated from the Roche Collaboration and Option Agreement. See Note 10, Collaboration 

Agreements: Roche Collaboration in the notes to the consolidated financial statements appearing elsewhere in this Annual Report on Form 10-K for a full 
discussion of this arrangement. 

Research and Development Expense

Research and development expense consists of expenses incurred in connection with the discovery and development of our product candidates, 

including the conduct of preclinical and clinical studies and product development, which are expensed as they are incurred. These expenses consist 
primarily of:

•

•

•

•

•

Compensation, benefits and other employee related expenses;

Supplies to support our internal research and development efforts;

Research and development related facility and depreciation costs;

Leased manufacturing space; and

Third-party contract costs relating to research, process and formulation development, preclinical and clinical studies and regulatory operations.

The lengthy process of securing regulatory approvals for new drugs requires the expenditure of substantial resources. Any delay or failure to obtain 

regulatory approvals would materially adversely affect our product candidate development efforts and our business overall. Given the inherent uncertainties 
of pharmaceutical product development, we cannot estimate with any degree of certainty the likelihood, timing or cost of obtaining regulatory approval and 
marketing our product candidates and thus, when, if ever, our product candidates will generate revenues and cash flows. 

The successful development of our product candidates is highly uncertain and subject to a number of risks. Refer to the risk factors under the 

heading Risks Related to the Development of Our Product Candidates in Part II, Item 1A, found elsewhere in this Annual Report on Form 10-K. 

Research and development activities account for a significant portion of our operating expenses. We expect our research and development expenses 

to decrease in the near future as we have discontinued our Synpheny-3 clinical trial and are evaluating strategic options for the Company. 

We track direct research and development expenses, consisting principally of external costs, such as costs associated with contract research 

organizations and manufacturing of preclinical and clinical drug product and other outsourced research and development expenses, to specific product 
programs. Costs related to specific product candidates are tracked upon the selection of a product candidate. We do not allocate employee and consulting-
related costs, costs associated with our platform and facility expenses, including depreciation or other indirect costs, to specific product candidate programs 
because these costs are deployed across multiple product candidate programs under research and development and, as such, are separately classified. The 
table below summarizes our research and development expenses by categories of costs for the periods presented (in thousands):

81

 
Labafenogene marselecobac (SYNB1934)
SYNB1618
SYNB8802
SYNB1353
SYNB1891
External pre-development candidate costs and unallocated 
costs
              Total external costs
Internal costs:
   Employee compensation and benefits (including equity-
based compensation expense)
   Facility and other
             Total internal costs
Total research and development expense

$

$

Year ended December 31,

2023

2022

$

13,267    
639    
976    
377    
(135 )  

4,225    
19,349    

13,200    
11,422    
24,622    
43,971    

$

4,380  
3,436  
4,197  
2,259  
1,223  

7,129  
22,624  

16,515  
12,905  
29,420  
52,044  

General and Administrative Expense

General and administrative expenses consist primarily of compensation, benefits and other employee-related expenses for personnel in our 
administrative, finance, legal, information technology, investor relations, business development and human resource functions. Other general and 
administrative costs include the legal costs of pursuing patent protection of our intellectual property, facility and information technology infrastructure 
costs, directors’ and officers’ insurance, and professional fees for accounting, tax, legal and consulting services. We anticipate that our general and 
administrative expenses may increase in the future as we explore strategic alternatives, including potential legal, accounting and advisory expenses and 
other related charges. We also anticipate that we will continue to incur accounting, legal, regulatory, compliance and director and officer insurance costs as 
well as investor and public relations expenses associated with being a public company.

Other Income (Expense)

Interest and investment income consists of income earned on investments. Interest expense consists of expense related to our finance leases. Other 

expense consists primarily of gains and losses on foreign currency invoices and losses on remeasurement of the purchase warrant liability.

Critical Accounting Policies and Estimates 

Our discussion and analysis of our financial condition and results of operations is based upon our consolidated financial statements prepared in 

accordance with generally accepted accounting principles in the U.S. (GAAP). The preparation of these financial statements requires us to make certain 
estimates and assumptions that affect the reported amounts of assets and liabilities, the reported amounts of revenues and expenses during the reported 
periods and related disclosures. These estimates and assumptions, including those related to revenue recognition and research and development expenses 
are monitored and analyzed by us for changes in facts and circumstances, and material changes in these estimates could occur in the future. These critical 
estimates and assumptions are based on our historical experience, our observance of trends in the industry, and various other factors that are believed to be 
reasonable under the circumstances and form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent 
from other sources. Actual results may differ from our estimates under different assumptions or conditions.

We believe that the application of the following accounting policies, each of which require significant judgments and estimates on the part of 
management, are the most critical to aid in fully understanding and evaluating our reported financial results. Our significant accounting policies are more 
fully described in Note 2, Summary of Significant Accounting Policies, to our consolidated financial statements appearing elsewhere in this Annual Report 
on Form 10-K.

82

 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
   
 
 
 
 
 
 
 
 
 
 
 
Revenue Recognition

We evaluate collaboration agreements with respect to FASB ASC Topic 808, Collaborative Arrangements, considering the nature and contractual 

terms of the arrangement and the nature of our business operations to determine the classification of the transactions. When we are an active participant in 
the activity and exposed to significant risks and rewards dependent on the commercial success of the collaboration, we will record our transactions on a 
gross basis in the consolidated financial statements and describe the rights and obligations under the collaborative arrangement in the notes to the 
consolidated financial statements.

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 revenue recognition for arrangements that an entity 
determines are within the scope of ASC 606, the entity performs the following five-step analysis: (i) identify the contract(s) with a customer; (ii) identify 
the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the 
contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. We only apply the five-step analysis to contracts when it is 
probable that we will collect the consideration we are entitled to in exchange for the goods or services we transfer to the customer. At contract inception, 
once the contract is determined to be within the scope of ASC 606, we assess the goods or services promised within each contract and determine those that 
are performance obligations and assesses whether each promised good or service is distinct. We then recognize as revenue the amount of the transaction 
price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied.

We may enter into collaboration agreements for research and development services, under which we may license certain rights to our product 
candidates to third parties. The terms of these arrangements typically include payment to us of one or more of the following: non-refundable, upfront 
license fees; reimbursement of certain costs; customer option exercise fees; development, regulatory and commercial milestone payments; and royalties on 
net sales of licensed products. Variable consideration is constrained until it is deemed to not be at a significant risk of reversal.

In determining the appropriate amount of revenue to be recognized as we fulfill our obligations under each of our agreements for which the 

collaboration partner is also a customer, we perform the following steps: (i) identification of the promised goods or services in the contract; (ii) 
determination of whether the promised goods or services are performance obligations including whether they are distinct in the context of the contract; (iii) 
measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance 
obligations; and (v) recognition of revenue when (or as) we satisfy each performance obligation. As part of the accounting for these arrangements, we must 
use significant judgment to determine: a) the number of performance obligations based on the determination under step (ii) above; b) the transaction price 
under step (iii) above; and c) the contract term and pattern of satisfaction of the performance obligations under step (v) above. We use significant 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 the goods and services we expect to provide. We use estimates to determine the timing of satisfaction of performance 
obligations, which may include the use of full-time equivalent time as a measure of satisfaction of performance obligations. 

Amounts received prior to satisfying the revenue recognition criteria are recorded as deferred revenue in our consolidated balance sheets. Amounts 

expected to be recognized as revenue within the 12 months following the balance sheet date are classified as current deferred revenue. Amounts not 
expected to be recognized as revenue within the 12 months following the balance sheet date are classified as deferred revenue, net of current portion. 

Licenses of Intellectual Property

In assessing whether a promise or performance obligation is distinct from the other promises, we consider factors such as the research, 

manufacturing and commercialization capabilities of the customer and the availability of the associated expertise in the general marketplace. In addition, 
we consider whether the customer can benefit from a promise for its intended purpose without the receipt of the remaining promises, whether the value of 
the promise 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, we utilize 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. We evaluate the measure of progress each reporting period and, if 
necessary, adjust the measure of performance and related revenue recognition.

83

 
Research and Development Services

If an arrangement is determined to contain a promise or obligation for us to perform research and development services, we must determine whether 

these services are distinct from the other promises in the arrangement. In assessing whether the services are distinct from the other promises, we consider 
the capabilities of the customer to perform these same services. In addition, we consider whether the customer can benefit from a promise for its intended 
purpose without the receipt of the remaining promise, whether the value of the promise 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 research and development 
services that are combined with other promises, we utilize 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 estimates we use to record revenue relating to the combined performance obligation on an over time basis, include input methods 
such as full-time equivalent time incurred compared to the full-time equivalent time expected to be incurred in the future to satisfy the performance 
obligation, which require management judgment. We evaluate the measure of progress each reporting period and, if necessary, adjust the measure of 
performance and related revenue recognition. With this method, we must estimate total inputs required to satisfy a performance obligation and measure 
efforts expended to date to determine revenue recognition. This estimate of remaining inputs is subjective, as the research is novel, and therefore efforts to 
be successful may be different than the estimated efforts at the balance sheet date. 

Customer Options

If an arrangement is determined to contain customer options that allow the customer to acquire additional goods or services, the goods and services 

underlying the customer options are not considered to be performance obligations at the outset of the arrangement, as they are contingent upon option 
exercise. We evaluate the customer options for material rights, that is, the option to acquire additional goods or services for free or at a discount. If the 
customer options are determined to represent a material right, the material right is recognized as a separate performance obligation at the outset of the 
arrangement. We allocate the transaction price to material rights based on an alternative approach when the goods or services are both (i) similar to the 
original goods and services in the contract and (ii) provided in accordance with the terms of the original contract. Under this alternative, we allocate the 
total amount of consideration expected to be received from the customer to the total goods or services expected to be provided to the customer. Amounts 
allocated to a material right are not recognized as revenue until the option is exercised and the performance obligation is satisfied.

Milestone Payments

At the inception of each arrangement that includes milestone payments, we evaluate whether a significant reversal of cumulative revenue provided 

in conjunction with achieving the milestones is probable and estimate the amount to be included in the transaction price using the most likely amount 
method. If it is probable that a significant reversal of cumulative revenue would not occur, the associated milestone value is included in the transaction 
price. Milestone payments that are not within our control or the licensee, such as regulatory approvals, are not considered probable of being achieved until 
those approvals are received. For other milestones, we evaluate 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 of cumulative revenue would not occur. At the end of each subsequent reporting period, we reevaluate the probability of achievement 
of all milestones subject to constraint and, if necessary, adjusts our 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.

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, we recognize revenue at the later of (i) when the related sales occur, or (ii) when the performance obligation 
to which some or all of the royalty has been allocated has been satisfied (or partially satisfied). To date, we have not recognized any royalty revenue 
resulting from any of our licensing arrangements.

Contract Costs

We recognize as an asset the incremental costs of obtaining a contract with a customer if the costs are expected to be recovered. As a practical 
expedient, we recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that we otherwise 
would have recognized is one year or less. To date, we have not incurred any incremental costs of obtaining a contract with a customer. 

84

 
Research and Development Expense

All research and development expenses are expensed as incurred. Research and development expenses comprise costs incurred in performing 
research and development activities, including compensation, benefits and other employee costs; equity‑based compensation expense; laboratory and 
clinical supplies and other direct expenses; facilities expenses; overhead expenses; fees for contractual services, including preclinical studies, clinical trials, 
clinical manufacturing and raw materials; and other external expenses. Nonrefundable advance payments for research and development activities are 
capitalized and expensed over the related service period or as goods are received and services are performed.

Warrants

Warrants are accounted for as either derivative liabilities or as equity instruments depending on the specific terms of the agreement. Warrants that 
are equity-classified instruments and recorded in additional paid-in capital at issuance are not subject to remeasurement. The purchase warrants issued in 
October 2023 are liability classified and recorded at fair value using the Black-Scholes option-pricing model at issuance, with any subsequent changes in 
fair value recognized in the consolidated statements of operations. We periodically evaluate changes in facts and circumstances that could impact the 
classification of warrants.

Results of Operations

The following discussion summarizes the key factors our management believes are necessary for an understanding of our consolidated financial 

results.

Revenue
Operating expenses:

Research and development
General and administrative

Total operating expenses
Loss from operations
Other income (expense):

Interest and investment income
Interest expense
Loss on purchase warrant liability
Other expense

Other income (expense), net
Loss before income taxes
Income tax expense
Net loss

Year ended December 31,

2023

2022

(in thousands)

3,371  

  $

43,971  
14,561  
58,532  
(55,161 )  

2,469  

(1 )  
(4,058 )  
(517 )  
(2,107 )  
(57,268 )  
(14 )  
(57,282 )   $

1,180  

52,044  
16,555  
68,599  
(67,419 )

1,267  
(2 )
—  
7  
1,272  
(66,147 )
—  
(66,147 )

$

$

Year Ended December 31, 2023 Compared to Year Ended December 31, 2022

Revenue

Revenue

Years Ended
December 31,

Change

2023

2022

$

%

  $

(in thousands)
3,371     $

1,180  

  $

2,191      

186 %

Revenue was $3.4 million for the year ended December 31, 2023 compared to $1.2 million for the year ended December 31, 2022. Revenue for both 

periods was primarily related to services performed under the Roche collaboration that we entered into in June 2021. 

85

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
   
 
 
   
 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
     
 
 
Operating Expenses

Operating expenses:

Research and development
General and administrative

Total operating expenses

Research and Development Expense

Years Ended
December 31,

Change

2023

2022

$

%

(in thousands)

 $

  $

43,971     $
14,561      
58,532     $

52,044  
16,555  
68,599  

  $

  $

(8,073 )    
(1,994 )    
(10,067 )    

-16 %
(12 )%
-15 %

Research and development expense was $44.0 million for the year ended December 31, 2023 compared to $52.0 million for the year ended 

December 31, 2022. The decrease of $8.0 million was due to decreases of clinical development costs of $3.2 million for SYNB8802, $2.8 million for 
SYNB1618, $1.9 million for SYNB1353, and $1.3 million for SYNB1891. There were additional decreases of $4.8 million in compensation, benefits and 
other employee-related expenses, $2.9 million in other early development candidates and unallocated costs. These decreases were offset by increases of 
clinical development costs of $8.9 million for Labafenogene marselecobac (SYNB1934).

General and Administrative Expense

General and administrative expense was $14.6 million for the year ended December 31, 2023 compared to $16.6 million for the year ended 
December 31, 2022. The decrease of $2.0 million was primarily attributable to decreased professional services costs, and lower compensation, benefits and 
other employee-related expenses due to reduced headcount.

Other Income (Expense)

Years Ended
December 31,

Change

2023

2022

$

%

(in thousands)

Other income (expense):

Interest and investment income
Interest expense
Loss on purchase warrant liability
Other expense

Total other income (expense), net

  $

  $

2,469     $
(1 )    
(4,058 )    
(517 )    
(2,107 )   $

1,267  

  $
(2 )    
—  
7  
1,272  

  $

1,202      
1      
(4,058 )    
(524 )    
(3,379 )    

95 %
(50 )%
100 %
(7486 )%
(266 )%

Other expense for the year ended December 31, 2023 was $2.11 million compared to other income of $1.30 million for the corresponding period in 

2022. The decrease in other income (expense) of $3.4 million was due to an increase in other expense primarily relating to the change in fair value of the 
purchase warrants classified as liabilities on the consolidated balance sheet. This increase of expense was offset by an increase to income earned on our 
cash, cash equivalents and short-term investment balances, primarily related to higher interest rates.

Liquidity and Capital Resources

We have incurred losses since our inception on March 14, 2014 and as of December 31, 2023, we had an accumulated deficit of $414.3 million. We 

have financed our operations to date primarily through the sale of preferred stock, common stock, preferred units and warrants, payments received under 
collaboration agreements, including the technology collaboration with Ginkgo, the Roche Collaboration and Option agreement, and prior collaborations, 
interest earned on investments, and cash received in the Merger. At December 31, 2023, we had $47.7 million in cash, cash equivalents, and short-term 
marketable securities. Our cash and cash equivalents include amounts held in money market funds, stated at cost plus unrealized gain and loss, which 
approximates fair market value. Our available-for-sale securities include amounts held in commercial paper and U.S. treasuries. We invest cash in excess of 
immediate requirements in accordance with our investment policy, which limits the amounts we may invest in any one type of investment and requires all 
investments held by us to maintain minimum ratings from Nationally Recognized Statistical Rating Organizations so as to primarily achieve liquidity and 
capital preservation.

During the year ended December 31, 2023, our cash, cash equivalents and marketable securities balance decreased $29.9 million. This decrease was 

primarily due to the cash used to operate our business, including payments related to, among other things, 

86

 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
     
 
 
     
     
     
   
  
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
     
 
 
     
     
     
   
   
   
   
   
   
 
research and development and general and administrative expenses as we continue to invest in our primary drug candidates and support the development of 
our proprietary platform. These decreases were offset by the proceeds from maturity of marketable securities. 

The following table sets forth the major sources and uses of cash, cash equivalents and restricted cash for each of the periods below:

Net cash, cash equivalents and restricted cash (used in) provided by
Operating activities
Investing activities
Financing activities
Net increase (decrease) in cash, cash equivalents and restricted cash

Years ended December 31,

2023

2022

(in thousands)

  $

  $

(51,614 )   $
38,769  
20,944  
8,099  

  $

(56,888 )
58,351  
(2,040 )
(577 )

Cash Flows from Operating Activities

Net cash, cash equivalents and restricted cash used in operating activities was $51.6 million for the year ended December 31, 2023. The primary use 

of cash was our net loss of $57.3 million and changes in our assets and liabilities of $6.2 million, partially offset by $11.9 million of non-cash items 
primarily including the change in fair value of purchase warrants, depreciation, equity-based compensation, and the right of use asset. The changes in our 
assets and liabilities include decreases in the operating lease liability, increases in prepaid expenses and other current assets, decreases in prepaid research 
and development expenses, decreases in accounts payable and accrued expenses, and decreased deferred revenue.

Net cash, cash equivalents and restricted cash used in operating activities was $56.9 million for the year ended December 31, 2022. The primary use 

of cash was our net loss of $66.1 million, partially offset by changes in our assets and liabilities of $0.7 million and $8.5 million of non-cash items 
primarily including depreciation, equity-based compensation, and the right of use asset. The changes in our assets and liabilities include decreases in the 
operating lease liability, decreases in prepaid expenses and other current assets, increases in prepaid research and development expenses, increases in 
accounts payable and accrued expenses, and increased deferred revenue.

Cash Flows from Investing Activities

Net cash provided by investing activities for the year ended December 31, 2023 was $38.8 million and resulted primarily from the proceeds from 

maturity of marketable securities of $66.9 million. This was offset by the purchases of marketable securities of $27.9 million and property and equipment 
of $0.2 million. 

Net cash provided by investing activities for the year ended December 31, 2022 was $58.4 million and resulted primarily from the proceeds from 

maturity of marketable securities of $141.9 million. This was offset by the purchases of marketable securities of $82.8 million and property and equipment 
of $0.7 million.

Cash Flows from Financing Activities

Net cash provided by financing activities for the year ended December 31, 2023 totaled $20.9 million, primarily related to net proceeds of $19.6 

million from the issuance of our common stock, pre-funded warrants and purchase warrants in an underwritten public offering in October 2023, $1.2 
million from the sale of our common stock in the ATM offering program, and $0.1 million of proceeds received from stock option exercises and purchases 
made pursuant to our employee stock purchase plan.

Net cash used in financing activities for the year ended December 31, 2022 totaled $2.0 million, primarily related to the repurchase of our common 

stock of $2.5 million, partially offset by $0.3 million from the sale of our common stock in the ATM offering program, and $0.2 million of proceeds 
received from stock option exercises and purchases made pursuant to our employee stock purchase plan.

Funding Requirements

We currently expect our expenses to decrease in the near term due to our decision to discontinue our Synpheny-3 clinical trial and conduct 
workforce reductions while we explore strategic alternatives. Pending the outcome of our review of strategic alternatives, should we decide to continue to 
advance the clinical development of our product candidates, we expect to incur additional costs in connection with such activities.

87

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
 
We have generated revenue from our Roche collaboration and previous collaborations, but have not generated any product revenue since our 
inception and do not expect to generate any product revenue unless we receive regulatory approval for our product candidates. Absent any other action, we 
would require additional liquidity to continue operations over the next 12 months, which raises substantial doubt about our ability to continue as a going 
concern. As discussed in Note 18, Subsequent Events, in February 2024, management and our board of directors approved a plan to discontinue the 
Synpheny-3 trial, evaluate strategic options and significantly reduce our workforce. We project that this plan will alleviate the substantial doubt that has 
been raised through significantly decreasing expenses thereby reducing ongoing liquidity needs to enable the continuation of the evaluation of strategic 
alternatives for at least 12 months from the issuance date of these financial statements. 

Our funding requirements will depend on many factors, including, but not limited to, the following: 

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the outcome, success, timing and cost of any strategic transactions, business combinations or divestiture;

the success of our research and development efforts;

the initiation, progress, timing, costs and results of clinical trials for our product candidates;

the time and costs involved in obtaining regulatory approvals for our product candidates;

the progress, timing and costs involved in developing manufacturing processes and agreements with third-party manufacturers;

the rate of progress and cost of our commercialization activities;

the expenses we incur in marketing and selling our product candidates;

the revenue generated by sales of our product candidates;

the emergence of competing or complementary technological developments;

the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights;

the terms and timing of any additional collaborative, licensing or other arrangements that we may establish;

the acquisition of businesses, products and technologies;

our need to implement additional infrastructure and internal systems; 

our need to add personnel and financial and management information systems to support our product development and potential future 
commercialization efforts, and to enable us to operate as a public company; 

the extent to which our business is adversely impacted by the effects of the coronavirus outbreak or by other health epidemics or pandemics; 
and

other risks and uncertainties, including those listed under Part I, Item 1A. “Risk Factors”.

Contractual Commitments and Obligations

We also have certain significant contractual obligations and commitments that require funding. Our commitments for operating leases relate to our 

lease of office and laboratory space at 301 Binney Street in Cambridge, Massachusetts and the cGMP clean-room space leased from the Azzur Group, 
LLC, in Waltham, Massachusetts. 

In July 2017, we entered into an agreement to lease 41,346 square feet of laboratory and office space at 301 Binney Street in Cambridge, 
Massachusetts. Annual rent is $3.4 million. The ten-year lease commenced in January 2018 and contains provisions for a free-rent period, annual rent 
increases and an allowance for tenant improvements. Additionally, we have paid for a tenant improvement investment of $2.9 million. In conjunction with 
the lease, we established a letter of credit of a $1.0 million.

On December 7, 2018, Synlogic Operating Company, Inc., a wholly-owned subsidiary of the Company, entered into a Statement of Work (the First 

SOW) with Azzur Group, LLC (Azzur) pursuant to a Master Contract Services Agreement (the Master Services Agreement), dated September 8, 2018, 
between the Company and Azzur.

Pursuant to the First SOW, Azzur agreed to provide the Company with access to, and the use of, an approximately 700 square foot cleanroom space 

to be constructed in Waltham, Massachusetts (the Azzur Suite), for a period of 44 months, from May 1, 2019 to December 31, 2022 (the Initial Term). 
Azzur also agreed to provide the Company with storage space and personnel support at the Azzur Suite. The total estimated project cost during the Initial 
Term for access to, and use of, the cleanroom and storage space, and the personnel support and other services, was $4.8 million.

88

 
 
In April 2021, Synlogic entered into a new agreement (the Second SOW) with Azzur which replaced the First SOW. Pursuant to the Second SOW, 

Synlogic was granted access to, and use of, the Azzur Suite for a period of 20 months, from May 2021 to December 2022 (the Second Term). The 
Company determined that the agreement contained an embedded lease because the Company controls the use of the Azzur Suite. Accordingly, the fixed 
and in-substance fixed consideration under the agreement was used to remeasure the right-of-use (ROU) asset and lease liability at the effective date of the 
Second SOW.

On January 21, 2022, the Company entered into two Statements of Work with Azzur. Pursuant to the first of these SOWs (the Third SOW), the 
Company has agreed to pay Azzur $0.7 million to renovate and upgrade the cleanroom space at Azzur for the Company’s expanded use. The second of 
these SOWs (the Fourth SOW) replaces the Second SOW that the Company entered into with Azzur on April 29, 2021. The Fourth SOW extends the term 
of the lease, for the period beginning January 2022 through March 2023 (the Third Term). The Third and Fourth SOWs resulted in an adjustment to the 
operating lease right-of-use asset and corresponding operating lease liabilities of $1.8 million.

In November 2022, the Company entered into a new agreement (the Fifth SOW) with Azzur that extended the term of the lease, for the period 

beginning April 2023 through December 2023 (the Fourth Term). The Fifth SOW contains two options to extend the lease, the first option goes through 
June 2024, and the second option goes through December 2024. The Fifth SOW resulted in an adjustment to the operating lease right-of-use asset and 
corresponding operating lease liabilities of $1.0 million.

In December 2023, the Company signed an addendum to exercise the First and Second Option to extend the lease as part of the Fifth SOW 
discussed above. Part of the addendum agreed to new payment terms that supersede the terms per the Fifth SOW with Azzur.  The total remaining liability 
associated with the Azzur lease is approximately $2.2 million as of December 31, 2023.

The Company may terminate the Fifth SOW on three months’ prior written notice at any time during the Term. In addition, either party may 
terminate the Master Services Agreement (including the SOWs) due to a breach by the other party and failure to cure. As of December 31, 2023, the 
Company is reasonably certain not to exercise the termination option through December 2024.

As we are a clinical stage company, we expect our most significant clinical trial expenditures will be with CROs and CMOs. These contracts 

generally are cancellable, with notice, at our option and do not have cancellation penalties. 

As an early-stage company, we are subject to a number of risks common to other life science companies, including, but not limited to, the ability to 

raise additional capital, development by our competitors of new technological innovations, risk of failure in preclinical studies, the safety and efficacy of 
our product candidates in clinical trials, the regulatory approval process, the ability to efficiently manufacture our products, market acceptance of our 
products once approved, lack of marketing and sales history, dependence on key personnel and protection of proprietary technology. Our therapeutic 
programs are currently pre-commercial, spanning discovery through early development and will require significant additional research and development 
efforts, including extensive preclinical and clinical testing and regulatory approval prior to commercialization of any product candidates. These efforts 
require significant amounts of additional capital, adequate personnel infrastructure and extensive compliance-reporting capabilities. There can be no 
assurance that our research and development will be successfully completed, that adequate protection for our intellectual property will be obtained, that any 
products developed will obtain necessary regulatory approval or that any approved products will be commercially viable. Even if our product development 
efforts are successful, it is uncertain when, if ever, we will generate revenue from product sales. We may never achieve profitability, and unless and until 
we do, we will continue to need to raise additional capital or obtain financing from other sources, such as strategic collaborations or alliances. If we cannot 
expand our operations or otherwise capitalize on our business opportunities because we lack sufficient capital, our business, financial condition and results 
of operations could be materially adversely affected.

Off-Balance Sheet Arrangements 

We do not have any relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structured finance or 
special purpose entities, that would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or 
limited purposes. As such, we are not exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in those types of 
relationships. We enter into guarantees in the ordinary course of business related to the guarantee of our performance and the performance of our 
subsidiaries.

Recent Accounting Pronouncements 

Please read Note 2, Summary of Significant Accounting Policies to the consolidated financial statements included elsewhere in this Annual Report 

on Form 10-K. 

89

 
 
 
Item 7A. Quantitative and Qualitative Disclosures About Market Risk. 

Interest Rate Risk

We are a smaller reporting company as defined by Rule 12b-2 of the Exchange Act and are not required to provide this information required under 

this item.

Item 8. Consolidated Financial Statements and Supplementary Data. 

Our consolidated financial statements, together with the independent registered public accounting firm report thereon, appear at pages F-1 through 

F-26 respectively, of this Annual Report on Form 10-K.

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

None.

Item 9A. Controls and Procedures. 

Definition and limitations of disclosure controls

Our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the 

Exchange Act)) are controls and other procedures that are designed to ensure that information required to be disclosed in our reports filed under the 
Exchange Act, such as this report, is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms. 
Disclosure controls and procedures are also designed to ensure that such information is accumulated and communicated to our management, including our 
principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure. Our management evaluates 
these controls and procedures on an ongoing basis.

There are inherent limitations to the effectiveness of any system of disclosure controls and procedures. These limitations include the possibility of 

human error, the circumvention or overriding of the controls and procedures and reasonable resource constraints. In addition, because we have designed our 
system of controls based on certain assumptions, which we believe are reasonable, about the likelihood of future events, our system of controls may not 
achieve its desired purpose under all possible future conditions. Accordingly, our disclosure controls and procedures provide reasonable assurance, but not 
absolute assurance, of achieving their objectives.

Evaluation of Disclosure Controls and Procedures

Our principal executive officer and principal financial officer, after evaluating the effectiveness of our disclosure controls and procedures (as defined 
in Exchange Act Rules 13a-15(e) and 15d-15(e)) as of the end of the period covered by this Form 10-K, have concluded that, based on such evaluation, our 
disclosure controls and procedures were effective to ensure that information required to be disclosed by us in the reports that we file or submit under the 
Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the SEC’s rules and forms, and is accumulated and 
communicated to our management, including our principal executive and principal financial officers, or persons performing similar functions, as 
appropriate to allow timely decisions regarding required disclosure. In addition, our principal executive officer and principal financial officer have 
concluded that the impact of the COVID-19 pandemic did not impact our ability to maintain our internal controls over financial reporting and disclosure 
controls and procedures.

Changes in Internal Control

There have not been any changes in our internal controls over financial reporting identified in connection with the evaluation of such internal control 

that occurred during our fiscal year ended December 31, 2023 that have materially affected, or are reasonably likely to materially affect, our internal 
controls over financial reporting.

Management’s 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, as amended. Because of its inherent limitations, internal control over financial reporting may not prevent or detect 
misstatements. 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.

90

 
Our management assessed the effectiveness of our internal control over financial reporting as of December 31, 2023. In making this assessment, 

management used the criteria set forth by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control-Integrated 
Framework (2013). Based on our assessment, management believes that, as of December 31, 2023, our internal control over financial reporting is effective 
based on those criteria.

Inherent Limitations on the Effectiveness of Controls

A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the 
controls are met. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues 
or misstatements, if any, within a company have been detected. Accordingly, our controls and procedures are designed to provide reasonable, not absolute, 
assurance that the objectives of our control system are met. 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.

Item 9B. Other Information. 

On March 18, 2024, our board of directors appointed Antoine Awad, our Chief Operating Officer, as our Principal Executive Officer (principal 

executive officer). There were no changes to Mr. Awad’s employment or compensation arrangements, and (a) there are no understandings or arrangements 
between Mr. Awad and any other person pursuant to which he was appointed as our Principal Executive Officer and (b) Mr. Awad has no material interest 
in any transaction or proposed transaction in which we are or are to be a party. Mr. Awad’s qualifications and experience were included in the “Executive 
Officers” section of our Definitive Proxy Statement as filed with the U.S. Securities and Exchange Commission on May 1, 2023, and the description of 
such qualifications and experience is hereby incorporated by reference.

Additionally, on March 18, 2024, our board of directors appointed May Beth Dooley, age 43, our Head of Finance, as our principal financial officer 

and principal accounting officer. 

Ms. Dooley has served as our Head of Finance since November 2023 and prior to that as our Controller since June 2018. Prior to joining us, Ms. 

Dooley worked as a senior manager of financial planning analysis at Idera Pharmaceuticals from July 2014 to May 2018, and prior to that, as an associate 
with PricewaterhouseCoopers from September 2012 to July 2014. Ms. Dooley received a B.A. from Bates College and an M.B.A. and a master’s degree in 
accounting from Northeastern University.

Ms. Dooley previously entered into an offer letter with us dated April 11, 2018 (the “Offer Letter”). She receives a current base salary of $325,000 
and is eligible to receive an annual bonus equal to 30% of her annualized base salary. The foregoing description of the material terms of the Offer Letter is 
qualified in its entirety by the full text of the Offer Letter, a copy of which is filed as an exhibit to this annual report on Form 10-K.

Ms. Dooley has no family relationships with any of our directors or executive officers, and she has no direct or indirect material interest in any 
transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K. In addition, there are no arrangements or understandings between Ms. 
Dooley and any other person pursuant to which she was selected as an officer.

Rule 10b5-1 Trading Plans

During the fiscal quarter ended December 31, 2023, none of our directors or executive officers adopted, modified or terminated any contract, 
instruction or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1 (c) or any 
"non-Rule 10b5-1 trading arrangement."

Item 9C. Disclosure Regarding Foreign Jurisdictions That Prevent Inspections. 

Not Applicable.

91

 
 
 
Item 10. Directors, Executive Officers and Corporate Governance. 

PART III

The response to this item is incorporated by reference from the discussion responsive thereto under the captions “Management and Corporate 
Governance Matters,” “Section 16(a) Beneficial Ownership Reporting Compliance,” and “Code of Conduct and Ethics” in the Company’s Proxy Statement 
for the 2024 Annual Meeting of Stockholders.

Item 11. Executive Compensation. 

The response to this item is incorporated by reference from the discussion responsive thereto under the caption “Executive Officer and Director 

Compensation” in the Company’s Proxy Statement for the 2024 Annual Meeting of Stockholders.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters. 

The response to this item is incorporated by reference from the discussion responsive thereto under the caption “Security Ownership of Certain 

Beneficial Owners and Management” in the Company’s Proxy Statement for the 2024 Annual Meeting of Stockholders.

Item 13. Certain Relationships and Related Transactions, and Director Independence. 

The response to this item is incorporated by reference from the discussion responsive thereto under the captions “Certain Relationships and Related 

Person Transactions” and “Management and Corporate Governance” in the Company’s Proxy Statement for the 2024 Annual Meeting of Stockholders.

Item 14. Principal Accounting Fees and Services. 

The response to this item is incorporated by reference from the discussion responsive thereto under the caption “Independent Registered Public 

Accounting Firm” in the Company’s Proxy Statement for the 2024 Annual Meeting of Stockholders.

92

 
 
Item 15. Exhibits, Financial Statement Schedules. 

Item 15(a).  The following documents are filed as part of this Annual Report on Form 10-K:

PART IV 

Item 15(a)(1) and (2)  See “Consolidated Financial Statements and Supplementary Data” at Item 8 to this Annual Report on Form 10-K. Other financial 
statement schedules have not been included because they are not applicable, or the information is included in the financial statements or notes thereto.

Item 15(a)(3)  The following exhibits are filed as part of, or incorporated by reference into, this Annual Report on Form 10-K.

Exhibit Index

Exhibit
Number

  2.1^

  3.1

  3.2

  3.3

  3.4

  3.5

  3.6

  3.7

  4.1

  4.2

  4.3

  4.4

  4.5

Exhibit Description

Filed
with this
Report

Agreement and Plan of Merger and Reorganization, 
dated as of May 15, 2017, by and among Mirna 
Therapeutics, Inc., Meerkat Merger Sub, Inc. and 
Synlogic, Inc. 

Amended and Restated Certificate of Incorporation 

Certificate of Amendment (Reverse Stock Split) to 
the Amended and Restated Certificate of 
Incorporation, dated August 25, 2017

Certificate of Amendment (Name Change) to the 
Amended and Restated Certificate of Incorporation

Certificate of Amendment to the Amended and 
Restated Certificate of Incorporation of Synlogic, 
Inc., dated June 15, 2023

Certificate of Amendment (Reverse Stock Split) to 
the Amended and Restated Certificate of 
Incorporation of Synlogic, Inc., dated September 27, 
2023

Amended and Restated Bylaws

Certificate of Designation of Series A Junior 
Participating Preferred Stock of Synlogic, Inc., as 
filed with the Secretary of State of the State of 
Delaware on February 20, 2024.

Form of Common Stock Certificate

Pre-Funded Warrant

Form of Pre-Funded Warrant

Form of Purchase Warrant

Description of Securities

93

Incorporated by
Reference herein
from Form or
Schedule

8-K
(Exhibit 2.1)

8-K
(Exhibit 3.1)

8-K
(Exhibit 3.1)

8-K
(Exhibit 3.2)

8-K 
(Exhibit 3.1)

8-K 
(Exhibit 3.1)

8-K
(Exhibit 3.2)

8-K
(Exhibit 3.1)

S-1/A
(Exhibit 4.2)

8-K
(Exhibit 4.1)

8-K
(Exhibit 4.1)

8-K
(Exhibit 4.2)

10-K
(Exhibit 4.3)

Filing
Date

SEC
File/Reg.
Number

05/16/2017

001-37566

10/6/2015

001-37566

08/28/2017

001-37566

08/28/2017

001-37566

6/15/2023

001-37566

9/28/2023

001-37566

10/6/2015

001-37566

2/20/2024

001-37566

09/18/2015

333-206544

06/12/2019

001-37566

9/29/2023

001-37566

9/29/2023

001-37566

03/12/2020

001-37566

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit
Number

  4.6

Exhibit Description

Rights Agreement, dated as of February 20, 2024, 
between Synlogic, Inc. and Equiniti Trust Company 
LLC, as rights agent.

10.1#

2015 Equity Incentive Award Plan

Filed
with this
Report

10.2#

10.3#

Form of Stock Option Grant Notice and Stock Option 
Agreement under the 2015 Equity Incentive Award 
Plan.

Form of Restricted Stock Award Agreement and 
Restricted Stock Unit Award Grant Notice under the 
2015 Equity Incentive Award Plan.

10.4#

2017 Stock Incentive Plan

10.5#

10.6#

10.7#

Form of Stock Option Grant Notice and Stock Option 
Agreement under 2017 Stock Incentive Plan.

2023 Inducement Equity Incentive Award Plan

Form of Stock Option Grant Notice and Stock Option 
Agreement under 2023 Inducement Equity Incentive 
Award Plan

X

X

10.8#

Non‑Employee Director Compensation Program.

10.9#

10.10#

10.11#

10.12#

10.13#

10.14#

10.15#

Form of Indemnification Agreement between the 
Company and each of its directors and officers

Offer Letter by and between Synlogic and Aoife M. 
Brennan, MB, BCh, BAO, MMSc, dated as of June 
22, 2016

First Amendment to Offer Letter by and between 
Synlogic and Aoife M. Brennan, MB, BCh, BAO, 
MMSc, dated as of November 7, 2016

Second Amendment to Offer Letter by and between 
Synlogic and Aoife M. Brennan, MB, BCh, BAO, 
MMSc, dated as of May 8, 2017

Third Amendment to Offer Letter dated as of June 5, 
2018, between Synlogic, Inc. and Aoife Brennan, 
MB, BCh, BAO, MMSc

Amended and Restated Letter Agreement by and 
between Synlogic, Inc. and Aoife M. Brennan, MB, 
BCh, BAO, MMSc, dated as of October 1, 2018

Amendment to Employment Agreement dated 
December 26, 2023, by and between the Company, 
and Aoife Brennan 

94

Incorporated by
Reference herein
from Form or
Schedule
8-K
(Exhibit 4.1)

10-K
(Exhibit 10.1)

S-1/A
(Exhibit 10.9(B))

S-1/A
(Exhibit 10.9(C))

10-K
(Exhibit 10.4)

10-Q
(Exhibit 10.17)

8-K
(Exhibit 10.1)

S-1/A
(Exhibit 10.13)

8-K
(Exhibit 10.6)

8-K
(Exhibit 10.7)

8-K
(Exhibit 10.8)

10-Q
(Exhibit 10.1)

10-Q
(Exhibit 10.1)

8-K 
(Exhibit 10.1)

Filing
Date
2/20/2024

SEC
File/Reg.
Number
001-37566

03/20/2018

001-37566

09/11/2015

333-206544

09/11/2015

333-206544

03/20/2018

001-37566

11/13/2017

001-37566

01/31/2020

001-37566

09/11/2015

333-206544

08/28/2017

001-37566

08/28/2017

001-37566

08/28/2017

001-37566

08/9/2018

001-37566

11/13/2018

001-37566

12/29/2023

001-37566

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit
Number

10.16#

Exhibit Description
Separation Agreement by and between Synlogic, Inc. 
and Aoife M. Brennan, MB, BCh, BAO, MMSc, 
dated as of February 17, 2024

Filed
with this
Report
X

Incorporated by
Reference herein
from Form or
Schedule

Filing
Date

SEC
File/Reg.
Number

10.17#

10.18#

10.19#

10.20#

10.21#

10.22#

10.23#

10.24#

10.25#

10.26†

10.27

10.28†

10.29†

10.30†

Employment Agreement dated as of January 24, 
2022, by and between Synlogic and Michael Jensen

8-K 
(Exhibit 10.1)

03/03/2022

001-37566

Separation Agreement by and between Synlogic, Inc. 
and Michael Jensen, dated as of November 13, 2023

X

Employment Letter Agreement dated November 28, 
2018, by and between Synlogic and Antoine Awad

Promotion Letter, dated July 21, 2020, for Antoine 
Awad

Amendment to Employment Agreement dated 
December 16, 2023, by and between the Company 
and Antoine Awad 

Separation Agreement by and between Synlogic, Inc. 
and Antoine Awad, dated as of February 17, 2024

Retention Bonus Agreement by and between 
Synlogic, Inc. and Antoine Awad, dated as of March 
7, 2024

Employment Letter Agreement dated April 11, 2018 
by and between Synlogic, Inc. and Mary Beth Dooley

Retention Bonus Agreement by and between 
Synlogic, Inc. and Mary Beth Dooley, dated as of 
March 7, 2024

License Agreement by and between Synlogic, Inc. 
and Synlogic IBDCo, Inc., dated as of July 16, 2015

Sales Agreement, dated as of July 23, 2021 by and 
between the registrant and Jefferies LLC

Master Contract Services Agreement, dated as of 
September 8, 2018, between Synlogic, Inc. and Azzur 
Group (d/b/a Azzur of New England LLC).

Statement of Work dated September 10, 2018 
pursuant to Master Contract Services Agreement 
between Synlogic, Inc. and Azzur Group (d/b/a Azzur 
of New England LLC).

Statement of Work dated December 7, 2018 pursuant 
to Master Contract Services Agreement between 
Synlogic, Inc. and Azzur Group (d/b/a Azzur of New 
England LLC).

X

X

X

X

95

10-K 
(Exhibit 10.14.1)

10-K 
(Exhibit 10.14.2)

8-K
(Exhibit 10.2)

03/25/2021

001-37566

03/25/2021

001-37566

12/29/2023

001-37566

8-K
(Exhibit 10.13)

10-Q
(Exhibit 1.1)

10-K
(Exhibit 10.29)

10-K
(Exhibit 10.30)

10-K
(Exhibit 10.31)

08/28/2017

001-37566

11/10/2021

001-37566

03/12/2019

001-37566

03/12/2019

001-37566

03/12/2019

001-37566

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Incorporated by
Reference herein
from Form or
Schedule
8-K
(Exhibit 10.1)

10-Q
(Exhibit 10.2)

8-K
(Exhibit 10.1)

10-Q
(Exhibit 10.1)

10-Q
(Exhibit 10.2)

10-Q
(Exhibit 10.1)

10-K
(Exhibit 10.30)

10-K
(Exhibit 10.31)

10-K
(Exhibit 10.32)

Filing
Date
06/12/2019

SEC
File/Reg.
Number
001-37566

08/08/2019

001-37566

12/20/2019

001-37566

08/12/2021

001-37566

08/12/2021

001-37566

11/09/2023

001-37566

03/17/2022

001-37566

03/17/2022

001-37566

03/29/2023

001-37566

Exhibit
Number

10.31

10.32†

10.33#

10.34†

10.35†

10.36

10.37†

10.38†

10.39†

10.40†

21.1

23.1

24.1

31.1

Exhibit Description
Subscription Agreement dated June 11, 2019 by and 
between the Company and Ginkgo Bioworks, Inc. 

Foundry Terms of Service Agreement dated June 11, 
2019 by and between Synlogic Operating Company 
Inc. and Ginkgo Bioworks, Inc.

Synlogic, Inc. 2015 Employee Stock Purchase Plan, 
as amended

License and Services Agreement and Statement of 
Work, dated April 28, 2021, by and between Synlogic 
Operating Company, Inc. and Azzur Cleanrooms-On-
Demand – Boston, LLC.

Pilot Collaboration and Option Agreement, dated 
June 16, 2021, among Synlogic Operating Company, 
Inc. and Hoffman-La Roche Inc.

Amendment to Pilot Collaboration and Option 
Agreement, dated as of August 16, 2023, among 
Synlogic Operating Company, Inc. and Hoffman-La 
Roche Inc.

Statement of Work dated January 21, 2022 pursuant 
to Master Contract Services Agreement between 
Synlogic, Inc. and Azzur Group (d/b/a Azzur of New 
England LLC), SOW P-10558-01

Statement of Work dated January 21, 2022 pursuant 
to Master Contract Services Agreement between 
Synlogic, Inc. and Azzur Group (d/b/a Azzur of New 
England LLC), SOW P-10558-2

Statement of Work dated November 22, 2022 
pursuant to Master Contract Services Agreement 
between Synlogic, Inc. and Azzur Group (d/b/a Azzur 
of New England LLC), SOW P-10558-01 Extension 
A

Addendum to Statement of Work dated December 8, 
2023 pursuant to Master Contract Services 
Agreement between Synlogic, Inc. and Azzur Group 
(d/b/a Azzur of New England LLC), SOW P-10558-
01 Addendum

Subsidiaries of the registrant

Consent of Independent Registered Public 
Accounting Firm

Power of Attorney (included in the signature page 
hereto)

Certification of Chief Executive Officer required by 
Rule 13a-14(a) or Rule 15d-14(a).

Filed
with this
Report

X

X

X

X

X

96

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit
Number

31.2

32.1

32.2

Exhibit Description
Certification of Chief Financial Officer required by 
Rule 13a-14(a) or Rule 15d-14(a).

Certification required by Rule 13a-14(b) or Rule 15d-
14(b) and Section 1350 of Chapter 63 of Title 18 of 
the United States Code (18 U.S.C. §1350).

Certification required by Rule 13a-14(b) or Rule 15d-
14(b) and Section 1350 of Chapter 63 of Title 18 of 
the United States Code (18 U.S.C. §1350). 

101.INS

Inline XBRL Instance Document - – the instance 
document does not appear in the Interactive Data File 
because XBRL tags are embedded within the Inline 
XBRL document.

101.SCH

Inline XBRL Taxonomy Extension Schema With 
Embedded Linkbase Documents

104

Cover Page Interactive Data File (embedded within the 
Inline XBRL document)

Filed
with this
Report
X

Incorporated by
Reference herein
from Form or
Schedule

Filing
Date

SEC
File/Reg.
Number

X

X

X

X

X

^ The schedules and exhibits to this exhibit have been omitted pursuant to Item 601(b)(2) of Regulation S-K. A copy of any omitted schedule and/or exhibit 
will be furnished to the SEC upon request.
# Management contract or compensatory plans or arrangements.
† Portions of this exhibit (indicated by asterisks) have been omitted in accordance with the rules of the Securities and Exchange Commission.

Item 16. Form 10-K Summary.

None. 

97

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed 

on its behalf by the undersigned, thereunto duly authorized.

SIGNATURES

Date: March 19, 2024

Synlogic, Inc.

By:

POWER OF ATTORNEY

/s/ ANTOINE AWAD
Antoine Awad
Principal Executive Officer 
(principal executive officer)

KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes and appoints each of Antoine Awad 

and Mary Beth Dooley his or her true and lawful attorney-in-fact and agent, with full power of substitution, for him or her and in his or her name, place and 
stead, in any and all capacities, to sign any and all amendments to this Annual Report on Form 10-K, and to file the same, with all exhibits thereto, and 
other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorney-in-fact and agent, full power and 
authority to do and perform each and every act and thing requisite and necessary to be done in connection therewith, as fully to all intents and purposes as 
he might or could do in person, hereby ratifying and confirming all that said attorney-in-fact and agent, or his or her substitutes or substitute, may lawfully 
do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, each of the undersigned has executed this Power of Attorney as of the date indicated opposite his name.

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below by the following persons on behalf of the 

registrant in the capacities indicated below and on the dates indicated.

Title

Date

Name

/s/ ANTOINE AWAD
Antoine Awad

  Principal Executive Officer
  (principal executive officer)

/s/ MARY BETH DOOLEY
Mary Beth Dooley

  Head of Finance
   (principal financial officer and principal accounting officer)

/s/ PETER BARRETT
Peter Barrett

/s/ MICHAEL BURGESS
Michael Burgess

/s/ MICHAEL HEFFERNAN
Michael Heffernan

/s/ PATRICIA HURTER
Patricia Hurter

/s/ LISA KELLY-CROSWELL
Lisa Kelly-Croswell

/s/ NICK LESCHLY
Nick Leschly

/s/ EDWARD MATHERS
Edward Mathers

/s/ RICHARD P. SHEA
Richard P. Shea

  Chairman of the Board

  Director

  Director

  Director

  Director

   Director

   Director

   Director

98

  March 19, 2024

  March 19, 2024

  March 19, 2024

  March 19, 2024

  March 19, 2024

  March 19, 2024

  March 19, 2024

  March 19, 2024

  March 19, 2024

  March 19, 2024

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
 
 
 
 
 
Index to Consolidated Financial Statements of Synlogic, Inc.

Report of Independent Registered Public Accounting Firm (KPMG LLP, Boston, MA, Auditor Firm ID: 185)
Consolidated Balance Sheets 
Consolidated Statements of Operations and Comprehensive Loss 
Consolidated Statements of Stockholders’ Equity 
Consolidated Statements of Cash Flows 
Notes to Consolidated Financial Statements

F-2
F-4
F-5
F-6
F-7
F-8

 
 
 
 
Report of Independent Registered Public Accounting Firm

To the Stockholders and Board of Directors
Synlogic, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Synlogic, Inc. and subsidiaries (the Company) as of December 31, 2023 and 2022, the 
related consolidated statements of operations and comprehensive loss, stockholders’ equity, and cash flows for the years then ended, and the related notes 
(collectively, 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, 2023 and 2022, and the results of its operations and its cash flows for the years then ended, in 
conformity with U.S. generally accepted accounting principles.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these 
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 in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable 
assurance about whether the 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.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was 
communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated 
financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not 
alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, 
providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Accounting for warrants issued in underwritten public offering

As discussed in Note 8 to the consolidated financial statements, in October 2023 the Company issued and sold, an underwritten public offering, 
common stock, pre-funded warrants, and common stock warrants to purchase its common stock (purchase warrants). The pre-funded warrants 
met the criteria for equity classification. The purchase warrants met the definition of a derivative instrument. Upon issuance, the purchase 
warrants were recorded as a liability at fair value in the amount of $7.1 million.

We identified the evaluation of the Company’s accounting for the purchase warrants and pre-funded warrants, specifically the classification as 
liabilities or equity, as a critical audit matter. A high degree of challenging and complex auditor judgment was required in evaluating the 
classification of the purchase warrants and pre-funded warrants due to interpretation of complex provisions included within the respective 
warrant agreements in order to apply the appropriate accounting guidance. Additionally, evaluating the Company's accounting for the purchase 
warrants and pre-funded warrants required specialized skills and knowledge.

The following are the primary procedures we performed to address this critical audit matter. We obtained and inspected the purchase warrants 
and pre-funded warrants agreements to identify key terms and conditions within the agreements that were relevant to the classification 
determination. We involved professionals with specialized skills and knowledge who assisted in:

F-2

 
 
 
 
 
 
 
 
•

•

assessing whether the Company's technical accounting analyses considered all key terms and conditions of the agreements that were relevant 
to the classification determination

evaluating the Company’s interpretation and application of the relevant accounting literature, including consideration of whether certain 
actions were within the Company’s control, to support the liability classification of the purchase warrants and the equity classification of the 
pre-funded warrants on the consolidated balance sheet. 

We have served as the Company’s auditor since 2015.

Boston, Massachusetts
March 19, 2024

/s/ KPMG LLP

F-3

 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Consolidated Balance Sheets

(In thousands, except share and per share data)

December 31,
2023

December 31,
2022

Assets
Current assets:

Cash and cash equivalents
Short-term marketable securities
Prepaid expenses and other current assets

Total current assets
Property and equipment, net
Right of use asset - operating lease
Restricted cash
Prepaid research and development, net of current portion
Other assets

Total assets

Liabilities and Stockholders' Equity
Current liabilities:

Accounts payable
Accrued expenses
Deferred revenue
Lease liability - operating lease
Finance lease obligations
Purchase warrant liability
Total current liabilities

Long-term liabilities:

Lease liability - operating lease, net of current portion
Finance lease obligations, net of current portion

Total long-term liabilities

Commitments and contingencies (Note 14)
Stockholders' equity

Common stock, $0.001 par value

250,000,000 shares authorized as of December 31, 2023 and December 31, 2022;
   9,465,949 shares issued and 9,186,157 shares outstanding as of December 31, 2023 and 
4,728,874 shares issued and 4,449,082 outstanding as of December 31, 2022

Additional paid-in capital
Accumulated other comprehensive income (loss)
Accumulated deficit
Treasury stock, at cost (279,792 shares at December 31, 2023 and at December 31, 2022)

Total stockholders' equity
Total liabilities and stockholders' equity

See accompanying notes to the consolidated financial statements.

F-4

  $

  $

  $

  $

  $

  $

  $

23,960  
23,786  
2,161  
49,907  
5,603  
12,102  
1,097  
6,825  
16  
75,550  

1,457  
3,000  
—  
4,780  
4  
11,163  
20,404  

12,491  
—  
12,491  

10  
459,458  
6  

(414,301 )    
(2,518 )    
42,655  
75,550  

  $

15,861  
61,768  
2,153  
79,782  
7,323  
14,356  
1,097  
8,300  
7  
110,865  

1,785  
5,290  
882  
4,152  
13  
—  
12,122  

16,129  
4  
16,133  

5  
442,303  
(161 )
(357,019 )
(2,518 )
82,610  
110,865  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
     
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
     
   
 
     
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
     
   
 
 
   
 
 
   
 
 
   
 
     
   
 
     
   
 
     
   
 
 
   
 
 
   
 
 
   
 
 
 
 
 
 
   
 
SYNLOGIC, INC. AND SUBSIDIARIES

Consolidated Statements of Operations and Comprehensive Loss

(In thousands, except share and per share amounts)

Revenue
Operating expenses:

Research and development
General and administrative

Total operating expenses
Loss from operations
Other income (expense):

Interest and investment income
Interest expense
Loss on purchase warrant liability
Other expense

Other income (expense), net
Loss before income taxes
Income tax expense
Net loss

Net loss per share - basic and diluted

Weighted-average common stock outstanding - basic and diluted

Comprehensive loss:
Net loss
Net unrealized gain (loss) on marketable securities

Comprehensive loss

See accompanying notes to the consolidated financial statements.

F-5

Years ended December 31,

2023

2022

  $

3,371  

  $

1,180  

43,971  
14,561  
58,532  
(55,161 )

2,469  
(1 )
(4,058 )
(517 )
(2,107 )
(57,268 )
(14 )
(57,282 )

(8.81 )

6,502,279  

(57,282 )
167  
(57,115 )

  $

  $

  $

  $

52,044  
16,555  
68,599  
(67,419 )

1,267  
(2 )
—  
7  
1,272  
(66,147 )
—  
(66,147 )

(13.83 )

4,781,696  

(66,147 )
(116 )
(66,263 )

  $

  $

  $

  $

 
 
 
 
 
 
 
 
 
 
 
   
 
   
  
   
  
   
   
   
   
   
 
   
 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
 
 
   
 
   
   
   
 
   
 
   
   
   
 
Balance at December 31, 2021

Proceeds from issuance of common stock in connection with at-
the-market offering, net of issuance costs
Repurchase of common stock

Exercise of options
Issuance of restricted stock
Issuance of common stock under employee stock purchase plan  
Cancellation of restricted stock
Equity-based compensation expense
Unrealized gain (loss) on securities
Net loss
Balance at December 31, 2022

Proceeds from issuance of common stock and accompanying 
pre-funded warrants, net of issuance costs
Proceeds from issuance of common stock in connection with at-
the-market offering, net of issuance costs
Exercise of pre-funded warrants
Issuance of restricted stock
Issuance of common stock under employee stock purchase plan  
Cancellation of restricted stock
Reverse split: fractional share adjustment
Equity-based compensation expense
Unrealized gain (loss) on securities
Net loss
Balance at December 31, 2023

See accompanying notes to the consolidated financial statements.

SYNLOGIC, INC. AND SUBSIDIARIES

Consolidated Statements of Stockholders’ Equity

(In thousands, except share amounts)

Common stock

    Additional

$0.001 par value

Shares
4,646,590  

  $

Amount

32,097  

—  
2,370  
50,851  
7,108  
(10,142 )  

—  
—  
—  

paid-in
capital

5  

  $

438,178  

  $

—  

—  
—  
—  
—  
—  
—  
—  
—  

288  

—  
61  
—  
137  
—  
3,639  
—  
—  

Accumulated
other
comprehensi
ve

income (loss)    

Accumulate
d
deficit
(290,872 )  

(45 )   $

Treasury Stock

Shares

    Amount    
  $

—  

  $

—  

Total
equity

147,266  

—  

—  
—  
—  
—  
—  
—  
(116 )  
—  

—  

—  
—  
—  
—  
—  
—  
—  

(66,147 )  

—  
(279,79

2 )  
—  
—  
—  
—  
—  
—  
—  
(279,79

—  

288  

(2,518 )  
—  
—  
—  
—  
—  
—  
—  

(2,518 )
61  
—  
137  
—  
3,639  
(116 )
(66,147 )

4,728,874  

  $

5  

  $

442,303  

  $

(161 )   $

(357,019 )  

2 )   $ (2,518 )   $

82,610  

3,921,928  

  $

4  

  $

12,976  

    $

12,980  

115,966  
669,126  
10,803  
34,478  
(15,119 )  
(107 )  
—  
—  
—  

9,465,949  

1,249  
—  
—  
124  
—  

2,806  
—  
—  

459,458  

—  

—  
—  
—  

—  
167  
—  

6  

—  

—  
—  
—  

—  
—  

(57,282 )  

—  

—  
—  
—  

—  
—  
—  
(279,79

—  

—  
—  
—  

—  
—  
—  

1,249  
1  
—  
124  
—  
—  
2,806  
167  
(57,282 )

(414,301 )  

2 )  

(2,518 )  

42,655  

1  
—  
—  
—  

—  
—  
—  

10  

F-6

 
 
 
 
   
   
 
   
   
 
 
 
 
   
   
   
   
 
   
 
 
 
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
   
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Consolidated Statements of Cash Flows

(In thousands) 

Cash flows from operating activities:

Net loss
Adjustments to reconcile net loss to net cash used in operating activities:

Depreciation
Gain on disposal of property and equipment
Equity-based compensation expense
Change in fair value warrant liability
Transaction costs allocated to warrant liabilities
Accretion/amortization of investment securities
Reduction in carrying amount of operating lease right of use asset
Changes in operating assets and liabilities:

Prepaid expenses and other current assets
Prepaid research and development, net of current portion
Other assets
Accounts payable and accrued expenses
Deferred revenue
Operating lease liabilities

Net cash used in operating activities
Cash flows from investing activities:
Purchases of marketable securities
Proceeds from maturity of marketable securities
Purchases of property and equipment
Proceeds from the sale of property and equipment

Net cash provided by investing activities
Cash flows from financing activities:

Payments on finance lease obligations
Proceeds from issuance of common stock in connection with at-the-market offering, net of issuance 
costs
Proceeds from employee stock purchases and exercise of stock options
Proceeds from issuance of common stock, pre-funded warrants and purchase warrants, net of 
issuance costs
Proceeds from exercise of pre-funded warrants
Repurchase of common stock (treasury stock)
Net cash provided by (used in) 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 activities:

Property and equipment purchases included in accounts payable and accrued expenses
Assets acquired under operating lease obligation

Supplemental disclosure of non-cash financing activities:

Cash paid for income taxes
Issuance costs included in accounts payable and accrued expenses
Cash paid for interest

See accompanying notes to the consolidated financial statements.

  $

 $
  $

  $
  $
 $

F-7

Year Ended
December 31,
2023

Year Ended
December 31,
2022

 $

(57,282 )    

(66,147 )

1,958  

(11 )    

2,806  
4,058  
508  
(818 )    
3,337  

(8 )    

1,475  

(9 )    
(2,653 )    
(882 )    
(4,093 )    
(51,614 )    

(27,931 )    
66,898  

(214 )    
16  
38,769  

(13 )    

1,249  
124  

19,583  
1  
—  
20,944  
8,099  
16,958  
25,057  

  $

29  
1,083  

  $
  $

14  
6  
1  

  $
  $
  $

2,520  
—  
3,639  
—  
—  
(772 )
3,149  

2,568  
1,009  
(4 )
697  
351  
(3,898 )
(56,888 )

(82,787 )
141,866  
(728 )
—  
58,351  

(13 )

293  
198  

—  
—  
(2,518 )
(2,040 )
(577 )
17,535  
16,958  

27  
3,616  

—  
6  
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SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements

(1)

Nature of Business 

Organization

Synlogic, Inc., together with its wholly owned and consolidated subsidiaries (Synlogic or the Company), is a clinical-stage biopharmaceutical 

company applying synthetic biology to the discovery and development of Synthetic Biotics. Synthetic Biotics are generated from Synlogic’s proprietary 
platform, leveraging a reproducible, modular approach to the generation of novel drug candidates that perform or deliver critical therapeutic functions. 
Synthetic Biotics are designed to metabolize a toxic substance, compensate for missing or damaged metabolic pathways or deliver combinations of 
therapeutic factors. Synlogic’s goal is to discover, develop and ultimately commercialize Synthetic Biotics. Since incorporation, the Company has devoted 
substantially all of its efforts to the research and development of its product candidates.

Going Concern and Liquidity

The Company’s consolidated financial statements have been prepared assuming it will continue as a going concern. The going concern assumption 
contemplates the continuity of operations, and the realization of assets and the satisfaction of liabilities in the ordinary course of business. The Company 
has historically generated negative cash flows from operations and has an accumulated deficit of $414.3 million at December 31, 2023. At December 31, 
2023, the Company had $47.7 million in cash, cash equivalents and short-term marketable securities. Absent any other action, the Company would require 
additional liquidity to continue its operations over the next 12 months, which raises substantial doubt about the Company's ability to continue as a going 
concern.

As discussed in Note 18, Subsequent Events, in February 2024, the Company and its board of directors approved a plan to discontinue the 
Synpheny-3 trial, significantly reduce its workforce and evaluate strategic options for the Company. The Company projects that this plan will alleviate the 
substantial doubt that has been raised through significantly decreasing expenses thereby reducing ongoing liquidity needs to enable the continuation of the 
evaluation of strategic alternatives for at least 12 months from the issuance date of these financial statements.

Risks and Uncertainties

As an early-stage company, the Company is subject to a number of risks common to other life science companies, including, but not limited to, 
raising additional capital, development by its competitors of new technological innovations, risk of failure in preclinical and clinical studies, safety and 
efficacy of its product candidates in clinical trials, the risk of relying on external parties such as contract research organizations (CROs) and contract 
manufacturing organizations (CMOs), the regulatory approval process, market acceptance of the Company’s products once approved, lack of marketing 
and sales history, dependence on key personnel and protection of proprietary technology. The Company’s therapeutic programs are currently pre-
commercial, spanning discovery through early development and will require significant additional research and development efforts, including extensive 
preclinical and clinical testing and regulatory approval, prior to commercialization of any product candidates. These efforts require significant amounts of 
additional capital, adequate personnel, infrastructure, and extensive compliance-reporting capabilities. 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 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 revenue from product sales. The Company may never achieve 
profitability, and unless and until it does, it will continue to need to raise additional capital or obtain financing from other sources, such as strategic 
collaborations or alliances.

COVID-19

While the Company is not aware of a material impact from the continuation of the COVID-19 pandemic through December 31, 2023, 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 
expenses and manufacturing, clinical trials, and research and development costs, depends on future developments that are uncertain at this time.

 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

(2)

Summary of Significant Accounting Policies

Basis of Presentation

The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United 

States (U.S.) (U.S. GAAP or GAAP). 

Reverse Stock Split

On September 27, 2023, the Company effected a one-for-fifteen reverse stock split of its issued and outstanding common stock, which also 

adjusted all outstanding warrants. Accordingly, all share and per share amounts for all periods presented in the accompanying consolidated financial 
statements and notes thereto have been adjusted retroactively, where applicable, to reflect this stock split. All fractional shares resulting from the reverse 
stock split were paid in cash.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Synlogic and its wholly owned subsidiaries. All intercompany accounts 

and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the reported 

amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities at the date of the consolidated financial 
statements and the reported amounts of expenses during the reporting period. On an on-going basis, the Company’s management evaluates its estimates, 
including those related to research and development accruals and prepaids, accrued expenses, contingencies, and investments. The Company bases its 
estimates on historical experience and on various other assumptions that are believed to be reasonable, the results of which form the basis for making 
judgments about the carrying values of assets and liabilities. Actual results could differ from those estimates. Changes in estimates are reflected in reported 
results in the period in which they become known.

Cash Equivalents 

The Company considers all highly liquid investment instruments with a remaining maturity when purchased of three months or less to be cash 
equivalents. Investments qualifying as cash equivalents consist of money market funds, including money market funds held in a sweep account. Cash 
equivalents are stated at cost plus accrued interest, which approximates fair value. The amount of cash equivalents included in cash and cash equivalents 
was approximately $24.0 million and $15.9 million at December 31, 2023 and 2022, respectively.

Concentration of Credit Risk

Financial instruments that potentially subject the Company to concentrations of credit risk include amounts held as cash, cash equivalents, 
marketable securities and restricted cash. The Company uses high quality, accredited financial institutions to maintain its balances, and accordingly, such 
funds are subject to minimal credit risk. The Company has not experienced any losses in such accounts and management believes that the Company is not 
exposed to significant credit risk due to the financial position of the depository institutions in which those deposits are held. The Company has no financial 
instruments with off-balance sheet risk of loss.

Restricted Cash

The Company held cash of approximately $1.1 million at December 31, 2023 and 2022 in a letter of credit to secure its lease at the 301 Binney 

Street facility. The Company has classified this deposit as long-term restricted cash on its balance sheet. 

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the statement of financial position that 

sum to the total of the same such amounts shown in the statement of cash flows (in thousands).

F-9

 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

Cash and cash equivalents
Restricted cash
Total cash, cash equivalents, and restricted cash shown in
   the consolidated statement of cash flows

  December 31,

    December 31,

2023

2022

  $

23,960     $
1,097      

15,861  
1,097  

$

25,057  

$

16,958  

Fair Value

The Company is required to disclose information on all assets and liabilities reported at fair value that enables an assessment of the inputs used in 
determining the reported fair values. Accounting Standards Codification (ASC) Topic 820, Fair Value Measurements and Disclosures, establishes a fair 
value hierarchy for those instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the 
Company’s own assumptions (unobservable inputs). The hierarchy consists of three levels: 

•

•

•

Level 1 – Utilize observable inputs such as quoted prices in active markets for identical assets or liabilities;

Level 2 – Utilize data points that are either directly or indirectly observable, such as quoted prices, interest rates and yield curves;

Level 3 – Utilize unobservable data points in which there is little or no market data, which require the Company to develop its own 
assumptions for the asset or liability. 

The Company evaluates transfers between levels at the end of each reporting period. There were no transfers of assets or liabilities between Level 1, 

Level 2 or Level 3 during the years ended December 31, 2023 and 2022. 

Available-for-Sale Securities

The Company classifies all of its investments as available-for-sale based upon its intent with regard to such investments. The Company classifies 

investments as short-term when their remaining contractual maturities are one year or less from the balance sheet date, and as long-term when the 
investment has a remaining contractual maturity of more than one year from the balance sheet date. Available-for-sale securities are carried at fair value, 
with the unrealized gains and losses reported in other comprehensive income (loss). The amortized cost of debt securities in this category is adjusted for 
amortization of premiums and accretion of discounts to maturity. Such amortization is included in interest and investment income. Realized gains and 
losses and declines in value judged to be other than temporary on available-for-sale securities, are included in interest and investment income.

The cost of securities sold is based on the specific identification method. Interest and dividends on securities classified as available-for-sale are 

included in interest and investment income. To determine whether an other-than-temporary impairment exists, the Company considers whether it has the 
ability and intent to hold the investment until a market price recovery, and whether evidence indicating the recoverability of the cost of the investment 
outweighs evidence to the contrary. 

Property and Equipment

Property and equipment, including leasehold improvements, are recorded at cost and depreciated over their estimated useful lives using the 
straight‑line method. Repairs and maintenance costs are expensed as incurred, whereas major improvements are capitalized as additions to property and 
equipment.

Depreciation begins at the time the asset is placed in service. Depreciation is provided over the following estimated useful lives:

Asset classification

Useful life

Computer and office equipment
Furniture and fixtures
Laboratory equipment
Leasehold improvements

  3 years
  5 years
  5 years
  Lesser of useful life or remaining lease term

F-10

 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

Impairment of Long‑Lived Assets

Long‑lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not 

be recoverable. When such events occur, the Company compares the carrying amounts of the assets to their undiscounted expected future cash flows. If this 
comparison indicates that there is impairment, the amount of impairment is calculated as the difference between the carrying value and fair value of the 
asset. To date, no such impairments have been recognized.

Leases

The Company uses judgement to assess if an arrangement is a lease at contract inception. An arrangement is a lease if the contract involves the use 
of a distinct identified asset, the lessor does not have substantive substitution rights and the Company obtains control of the asset throughout the period by 
obtaining substantially all of the economic benefit of the asset and the right to direct the use of the asset. Leases classified as operating leases are included 
in operating lease right-of-use (ROU) assets, current operating lease liabilities and noncurrent operating lease liabilities in our consolidated balance sheet. 
Finance leases are included in property and equipment and finance lease obligations in our consolidated balance sheet.

ROU assets represent the right-to-use an underlying asset for the lease term and lease liabilities represent the obligation to make lease payments 

arising from the lease. ROU assets and lease liabilities are recognized at the lease commencement date based on the estimated present value of lease 
payments over the lease term. The Company utilizes its incremental borrowing rate to determine the present value of lease payments. The incremental 
borrowing rate is the rate incurred to borrow similar funds, on a collateralized basis, over a comparable term in a similar economic environment.

The Company has elected to account for the lease and non-lease components for leases as a single component for classes of all underlying assets and 

allocate all of the contract consideration to the lease component only. Lease cost for operating leases is recognized on a straight-line basis over the lease 
term and is included in operating expenses on the statements of operations and comprehensive loss. Variable lease payments are included in lease operating 
expenses.

The lease term includes options to extend the lease when it is reasonably certain that option will be exercised. Leases with a term of 12 months or 

less are not recorded on the Company’s consolidated balance sheet.

Research and Development Costs

Costs incurred in research and development are expensed as incurred. The Company defers and capitalizes nonrefundable advance payments made 

by the Company for research and development activities until the related goods are received or the related services are performed.

Research and development expenses are comprised of costs incurred in performing research and development activities, including salary and 

benefits, equity-based compensation expense, laboratory supplies and other direct expenses, facilities expenses, overhead expenses, contractual services 
and other outside expenses.

When third-party service providers’ billing terms do not coincide with the Company’s period-end, the Company is required to make estimates of its 

obligations to those third parties, including clinical trial costs, contractual services costs and costs for supply of its drug candidates, incurred in a given 
accounting period and record accruals at the end of the period. The Company bases its estimates on the completion status of the research and development 
programs and the associated estimate of unbilled costs.

Warrants

The Company accounts for issued warrants either as a liability or equity in accordance with ASC 480-10, Accounting for Certain Financial 

Instruments with Characteristics of both Liabilities and Equity (“ASC 480-10”) or ASC 815-40, Accounting for Derivative Financial Instruments Indexed 
to, and Potentially Settled in, a Company’s Own Stock (“ASC 815-40”). The assessment considers whether the warrants are freestanding financial 
instruments pursuant to ASC 480, meet the definition of a liability pursuant to ASC 480, and whether the warrants meet all of the requirements for equity 
classification under ASC 815, including whether the warrants are indexed to the company’s own stock and whether the warrant holders could potentially 
require “net cash settlement” in a circumstance outside of the company’s control, among other conditions for equity classification. This assessment, which 
requires the use of professional judgment, is conducted at the time of warrant issuance and as of each subsequent quarterly period end date while the 
warrants are outstanding.

F-11

 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

Warrants that are equity-classified instruments and recorded in additional paid-in capital at issuance are not subject to remeasurement. The 

purchase warrants issued in October 2023 are liability classified and recorded at fair value using the Black-Scholes option-pricing model at issuance, with 
any subsequent changes in fair value recognized in the consolidated statements of operations. The Company periodically evaluates changes in facts and 
circumstances that could impact the classification of warrants.

Revenue recognition

The Company was generating revenue through a collaboration and option agreement with Roche for the development and commercialization of 
product candidates. The Roche Collaboration and Option Agreement concluded after the last milestone was achieved by the Company in October 2023. 
Subsequently, Roche did not exercise its exclusive option to enter into a licensing and collaboration agreement for further development and 
commercialization of the product candidate.

The Company evaluates collaboration agreements with respect to FASB ASC Topic 808, Collaborative Arrangements, considering the nature and 
contractual terms of the arrangement and the nature of its business operations to determine the classification of the transactions. When the Company is an 
active participant in the activity and exposed to significant risks and rewards dependent on the commercial success of the collaboration, it will record its 
transactions on a gross basis in the consolidated financial statements and describe the rights and obligations under the collaborative arrangement in the 
notes to the consolidated financial statements.

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 revenue recognition for arrangements that an entity 
determines are within the scope of ASC 606, the entity performs the following five-step analysis: (i) identify the contract(s) with a customer; (ii) identify 
the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations in the 
contract; and (v) recognize revenue when (or as) the entity satisfies a performance obligation. The Company only applies the five-step analysis to contracts 
when it is probable that the entity will collect the consideration it is entitled to in exchange for the goods or services it transfers to the customer. At contract 
inception, once the contract is determined to be within the scope of ASC 606, the Company assesses the goods or services promised within each contract 
and determines those that are performance obligations and assesses whether each promised good or service is distinct. The Company then recognizes as 
revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) the performance obligation is satisfied.

The Company may enter into collaboration agreements for research and development services, under which the Company may license certain rights 
to its product candidates to third parties. The terms of these arrangements typically include payment to the Company of one or more of the following: non-
refundable, upfront license fees; reimbursement of certain costs; customer option exercise fees; development, regulatory and commercial milestone 
payments; and royalties on net sales of licensed products. Variable consideration is constrained until it is deemed not be at significant risk of reversal.

In determining the appropriate amount of revenue to be recognized as it fulfills its obligations under each of its agreements for which the 

collaboration partner is also a customer, the Company performs the following steps: (i) identification of the promised goods or services in the contract; (ii) 
determination of whether the promised goods or services are performance obligations including whether they are distinct in the context of the contract; (iii) 
measurement of the transaction price, including the constraint on variable consideration; (iv) allocation of the transaction price to the performance 
obligations; and (v) recognition of revenue when (or as) the Company satisfies each performance obligation. As part of the accounting for these 
arrangements, the Company must use significant judgment to determine: a) the number of performance obligations based on the determination under step 
(ii) above; b) the transaction price under step (iii) above; and c) the contract term and pattern of satisfaction of the performance obligations under step (v) 
above. The Company uses significant 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 the goods and services the Company expects to provide. The Company 
uses estimates to determine the timing of satisfaction of performance obligations, which may include the use of full-time equivalent time as a measure of 
satisfaction of performance obligations. 

Amounts received prior to satisfying the revenue recognition criteria are recorded as deferred revenue in the Company’s consolidated balance sheets. 

Amounts expected to be recognized as revenue within the 12 months following the balance sheet date are classified as current deferred revenue. Amounts 
not expected to be recognized as revenue within the 12 months following the balance sheet date are classified as deferred revenue, net of current portion. 

Licenses of Intellectual Property

F-12

 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

In assessing whether a promise or performance obligation is distinct from the other promises, we consider factors such as the research, 

manufacturing and commercialization capabilities of the customer and the availability of the associated expertise in the general marketplace. In addition, 
we consider whether the customer can benefit from a promise for its intended purpose without the receipt of the remaining promises, whether the value of 
the promise 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, we utilize 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. We evaluate the measure of progress each reporting period and, if 
necessary, adjust the measure of performance and related revenue recognition. 

Research and Development Services

If an arrangement is determined to contain a promise or obligation for us to perform research and development services, we must determine whether 

these services are distinct from the other promises in the arrangement. In assessing whether the services are distinct from the other promises, we consider 
the capabilities of the customer to perform these same services. In addition, we consider whether the customer can benefit from a promise for its intended 
purpose without the receipt of the remaining promise, whether the value of the promise 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 research and development 
services that are combined with other promises, we utilize 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 estimates we use to record revenue relating to the combined performance obligation on an over time basis, include input methods 
such as full-time equivalent time incurred compared to the full-time equivalent time expected to be incurred in the future to satisfy the performance 
obligation, which require management judgment. We evaluate the measure of progress each reporting period and, if necessary, adjust the measure of 
performance and related revenue recognition. With this method, we must estimate total inputs required to satisfy a performance obligation and measure 
efforts expended to date to determine revenue recognition. This estimate of remaining inputs is subjective, as the research is novel, and therefore efforts to 
be successful may be different than the estimated efforts at the balance sheet date. 

Customer Options

If an arrangement is determined to contain customer options that allow the customer to acquire additional goods or services, the goods and services 

underlying the customer options are not considered to be performance obligations at the outset of the arrangement, as they are contingent upon option 
exercise. The Company evaluates the customer options for material rights, that is, the option to acquire additional goods or services for free or at a 
discount. If the customer options are determined to represent a material right, the material right is recognized as a separate performance obligation at the 
outset of the arrangement. The Company allocates the transaction price to material rights based on an alternative approach when the goods or services are 
both (i) similar to the original goods and services in the contract and (ii) provided in accordance with the terms of the original contract. Under this 
alternative, the Company allocates the total amount of consideration expected to be received from the customer to the total goods or services expected to be 
provided to the customer. Amounts allocated to a material right are not recognized as revenue until the option is exercised and the performance obligation 
is satisfied.

Milestone Payments

At the inception of each arrangement that includes milestone payments, the Company evaluates whether a significant reversal of cumulative revenue 

provided in conjunction with achieving the milestones is probable 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 of cumulative revenue would not occur, the associated milestone value is included in the 
transaction price. Milestone payments that are not within the control of the Company or the licensee, such as regulatory approvals, are not considered 
probable of being achieved until those approvals are received. For other milestones, 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 of cumulative revenue 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.

F-13

 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

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.

Contract Costs

The Company recognizes as an asset the incremental costs of obtaining a contract with a customer if the costs are expected to be recovered. As a 
practical expedient, the Company recognizes the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the 
asset that we otherwise would have recognized is one year or less. To date, the Company has not incurred any incremental costs of obtaining a contract with 
a customer.

Equity‑Based Compensation

The Company measures equity-based compensation to employees, non-employees and directors based on the grant date fair value of the awards and 

recognizes the associated expense in the financial statements over the requisite service period of the award, which is generally the vesting period. The fair 
value of each option and purchase rights under the employee stock purchase plan (ESPP) is estimated on the date of grant using the Black‑Scholes 
option‑pricing model. Expected volatility for the Company’s common stock is determined based on an average of the historical volatility of the Company 
and the historical volatility of a peer‑group of similar public companies. The expected term of options granted to employees is calculated using the 
simplified method, which represents the average of the contractual term of the option and the weighted-average vesting period of the option. The expected 
term of purchase rights for the ESPP is based on the duration of an offering period. The assumed dividend yield is based upon the Company’s expectation 
of not paying dividends in the foreseeable future. The risk‑free interest rate is based upon the U.S. Treasury yield curve commensurate with the expected 
term at the time of grant or remeasurement. Forfeitures are recognized as they occur. 

The Company classifies equity-based compensation expense in its consolidated statements of operations and comprehensive loss in the same manner

in which the award recipient’s payroll costs are classified or in which the award recipients’ service payments are classified.

Income Taxes

The Company accounts for income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for 

the expected future tax consequences of events that have been recognized in the financial statements or in the Company’s tax returns. Deferred taxes are 
determined based on the difference between the financial reporting and tax basis of assets and liabilities using enacted tax rates in effect in the years in 
which the differences are expected to reverse. Changes in deferred tax assets and liabilities are recorded in the provision for income taxes. The Company 
assesses the likelihood that its deferred tax assets will be recovered from future taxable income and, to the extent it believes based upon the weight of 
available evidence, that it is more likely than not that all or a portion of deferred tax assets will not be realized, a valuation allowance is established through 
a charge to income tax expense. Potential for recovery of deferred tax assets is evaluated by estimating the future taxable profits expected and considering 
prudent and feasible tax planning strategies. 

Uncertain tax positions represent tax positions for which reserves have been established. The Company accounts for uncertainty in income taxes 
recognized in the consolidated 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 be recognized 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.

Net Loss Per Share

Basic net loss per share is computed using the weighted-average number of shares of common stock outstanding during the period. Diluted net loss 

per share is computed using the sum of the weighted-average number of shares of common stock outstanding during the period and if dilutive, the 
weighted-average number of potential shares of common stock, including unvested restricted common stock, outstanding stock options and potential shares 
issuable under the ESPP.

F-14

 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

Segment Information

Operating segments are defined as components of an enterprise about which separate discrete financial information is available for evaluation by the 

chief operating decision maker, or decision-making group, in deciding how to allocate resources and in assessing performance. The Company operates in 
one operating segment: discovery and development of synthetic biology therapeutics for the treatment of rare, infectious and other diseases. The 
Company’s chief executive officer, as chief operating decision maker, manages and allocates resources to the operations of the Company on a total 
company basis. All of the Company’s equipment, leasehold improvements and other fixed assets are physically located within the United States, and all 
agreements with its partners are denominated in U.S. dollars, except where noted.

Treasury Stock

Treasury stock purchases are accounted for under the cost method whereby the entire cost of the acquired stock is recorded as treasury stock.

Recently Issued and Adopted Accounting Pronouncements 

From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (FASB) or other accounting standard 

setting bodies that the Company adopts as of the specified effective date. Unless otherwise discussed below, recently issued pronouncements that are or will 
be applicable to the Company did not have, or are not expected to have, a material impact on its present or future consolidated financial statements or 
disclosures.

(3)

Fair Value of Financial Instruments

The tables below present information about the Company’s assets that are measured at fair value on a recurring basis as of December 31, 2023 and 

2022 and indicate the fair value hierarchy of the valuation techniques the Company utilized to determine such fair value, as described under Note 2, 
Summary of Significant Accounting Policies. 

The Company’s investment portfolio includes many fixed income securities that do not always trade on a daily basis. As a result, the pricing 
services used by the Company applied other available information as applicable through processes such as benchmark yields, benchmarking of like 
securities, sector groupings and matrix pricing to prepare evaluations. In addition, model processes were used to assess interest rate impact and develop 
prepayment scenarios. These models take into consideration relevant credit information, perceived market movements, sector news and economic events. 
The inputs into these models may include benchmark yields, reported trades, broker-dealer quotes, issuer spreads and other relevant data.

F-15

 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

At December 31, 2023 and 2022, the Company has classified assets measured at fair value on a recurring basis as follows (in thousands):

Description

Money market funds
Commercial paper (included in cash and cash 
equivalents)
Commercial paper
U.S. government agency securities and treasuries
Total

Description

Money market funds
Commercial paper
U.S. treasuries
Total

  $

  $

  $

Fair Value Measurements at Reporting Date Using

December 31,
2023

Quoted Prices in 
Active
Markets for Identical
Assets
(Level 1)

Significant Other
Observable Inputs
(Level 2)

Significant
Unobservable Inputs  
(Level 3)

  $

15,476     $

15,476     $

—     $

8,484  
14,342    
9,444    
47,746     $

—  
—    
6,956    
22,432     $

8,484      
14,342      
2,488      
25,314     $

—  

—  
—  
—  
—  

Fair Value Measurements at Reporting Date Using

December 31,
2022

Quoted Prices in 
Active
Markets for Identical
Assets
(Level 1)

Significant Other
Observable Inputs
(Level 2)

Significant
Unobservable Inputs  
(Level 3)

15,861     $
44,375    
17,393    
77,629     $

15,861     $
—    
17,393    
33,254     $

—     $
44,375      
—      
44,375     $

—  
—  
—  
—  

Cash equivalents, prepaid expenses and other current assets, accounts payable and accrued expenses at December 31, 2023 and December 31, 2022 

are carried at amounts that approximate fair value due to their short-term maturities. Finance lease obligations at December 31, 2023 and December 31, 
2022 approximate fair value as they bear interest at a rate approximating a market interest rate.

The following tables summarize the estimated fair value of the assets presented within cash and cash equivalents measured at fair value and the 

gross unrealized holding gains and losses (in thousands):

December 31, 2023
Money market funds (included in cash and cash 
equivalents)
Commercial paper (included in cash and cash equivalents)  
Total

$

  $

Amortized Cost

  Gross unrealized gains  

  Gross unrealized losses  

Fair Value

$

15,476  
8,482    
23,958     $

—  

$

2    
2     $

—  
—  
—  

  $

  $

15,476  
8,484  
23,960  

December 31, 2022
Money market funds (included in cash and cash 
equivalents)
Total

Amortized Cost

  Gross unrealized gains  

  Gross unrealized losses  

Fair Value

$
  $

15,861  
$
15,861     $

—  
$
—     $

—  
—  

  $
  $

15,861  
15,861  

F-16

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
   
 
   
 
   
 
 
 
 
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

(4)

Available-for-Sale Securities

The following tables summarize the available-for-sale securities held at December 31, 2023 and 2022 (in thousands):

December 31, 2023
Commercial paper
Corporate debt securities
U.S. government agency securities and treasuries
Total

December 31, 2022
Commercial paper
Corporate debt securities
U.S. government agency securities and treasuries
Total

  $

  $

  $

  $

Amortized cost

Gross unrealized
gains

Gross unrealized
losses

Fair Value

14,338     $
—    
9,444    
23,782     $

4     $

—    
1    
5     $

—     $
—    
(1 )  
(1 )   $

14,342  
—  
9,444  
23,786  

Amortized cost

Gross unrealized
gains

Gross unrealized
losses

Fair Value

44,437     $
—    
17,492    
61,929     $

8     $

—    
—    
8     $

(70 )   $
—    
(99 )  
(169 )   $

44,375  
—  
17,393  
61,768  

The contractual maturity of all securities held at December 31, 2023 was six months or less. There were two investments in an unrealized loss 

position at December 31, 2023. The aggregate fair value of the securities in an unrealized loss position at December 31, 2023 and 2022 was $5.4 million 
and $36.6 million, respectively. The Company reviews its investments for other-than-temporary impairment whenever the fair value of an investment is 
less than amortized cost and evidence indicates that an investment’s carrying amount is not recoverable within a reasonable period of time. To determine 
whether an impairment is other-than-temporary, the Company considers whether it has the ability and intent to hold the investment until maturity or a 
market price recovery and considers whether evidence indicating the cost of the investment is recoverable outweighs evidence to the contrary. The 
Company did not hold any securities with an other-than-temporary impairment at December 31, 2023. 

Gross realized gains and losses on the sales of investments have not been material to the Company’s consolidated statement of operations.

(5)

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist of the following (in thousands):

Prepaid insurance
Prepaid research and development
Other prepaid expenses
Other current assets
Total prepaid expenses and other current assets

F-17

  December 31,

    December 31,

2023

2022

  $

  $

691     $
788      
536      
146      
2,161     $

887  
320  
771  
175  
2,153  

 
 
 
 
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
 
 
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
   
   
   
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

(6)

Property and Equipment, net

Property and equipment, net consists of the following (in thousands):

Laboratory equipment
Computer and office equipment
Furniture and fixtures
Leasehold improvements
Construction in progress

Less accumulated depreciation
Property and equipment, net

  December 31,

    December 31,

2023

2022

  $

  $

8,582     $
793      
500      
9,820      
192      
19,887      
(14,284 )    
5,603     $

9,313  
793  
500  
9,820  
37  
20,463  
(13,140 )
7,323  

Depreciation expense on property and equipment was $2.0 million and $2.5 million in 2023 and 2022, respectively. 

(7)

Accrued Expenses

Accrued expenses consist of the following (in thousands):

Payroll related
Professional fees
Research and development
Other
Total accrued expenses

(8)

Stockholders' Equity

Reverse Stock Split 

  December 31,

    December 31,

2023

2022

  $

  $

2,556     $
290      
91      
63      
3,000     $

3,401  
152  
1,624  
113  
5,290  

On September 27, 2023, the Company effected a reverse stock split of its shares of common stock, pursuant to which every fifteen (15) shares of the 

its issued and outstanding common stock was automatically converted into one (1) issued and outstanding share of common stock without any change in 
the par value of $0.001 per share. The reverse stock split was approved by the stockholders on September 21, 2023 at a special meeting of stockholders.

October 2023 Financing

On October 3, 2023, the Company issued and sold, through an underwritten public offering:

•

•

•

 3,921,928 shares of its common stock at a price of $2.84 per share less underwriting discounts and commissions; 

pre-funded warrants to purchase up to 3,472,435 shares of its common stock at a price of $2.839 immediately following the consummation of 
the offering, and; 

accompanying common stock warrants to purchase up to 7,394,363 shares of its common stock at a price of $3.408 per share exercisable 
immediately after issuance and expires five years from the date of issuance. 

Each share of its common stock and each pre-funded warrant was sold together with a common warrant to purchase one share of its common 

stock. A holder of pre-funded warrants may not exercise the warrant if the holder, together with its affiliates, would beneficially own more than 4.99% (or, 
upon election by a holder prior to the issuance of any warrants, 9.99%) of the number of shares of common stock outstanding immediately after giving 
effect to such exercise. The net proceeds to the Company from the sale of common stock and pre-funded warrants through the offering, after deducting the 
underwriting discounts and commissions and offering expenses payable by the Company, were approximately $19.6 million.

The common stock and pre-funded warrants met the criteria for equity classification.  The purchase warrants met the definition of a derivative 
instrument.  Accordingly, upon issuance, the purchase warrants were recorded as a liability at fair value using the Black-Scholes option-pricing model in 
the amount of $7.1 million.  Any subsequent changes in fair value of the purchase 

F-18

 
 
 
 
 
 
 
   
 
   
   
   
   
 
   
   
 
 
 
 
 
 
   
 
   
   
   
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

warrants is recognized in the consolidated statements of operations. The residual proceeds were allocated between the common stock and pre-funded 
warrants based on their relative fair values at the time of issuance. The amount allocated to the pre-funded warrants was recorded as a component of 
stockholders’ equity within additional paid-in capital.

At December 31, 2023, the fair value of the purchase warrants was $11.2 million.  Accordingly, a loss on remeasurement of the purchase warrant 

liability of $4.1 million was recorded in the fourth quarter of 2023. The assumptions used in the Black-Scholes option-pricing model at issuance and at 
December 31, 2023 were:

Expected Term
Weighted-average, risk free interest rate
Expected volatility
Dividend yield
Strike price

$

December 31, 2023

At Issuance

4.75 years    
3.9 % 
94.0 % 
—    
3.41    

$

5.0 years  

4.8 %
91.1 %
—  
3.41  

Subsequent to their issuance and through December 31, 2023, 669,126 pre-funded warrants have been exercised.  None of the purchase warrants 

have been exercised since their issuance.

At-the-Market (ATM) Offering Program

In July 2021, the Company entered into a sales agreement with Jefferies, LLC (Jefferies) with respect to an ATM, under which the Company may 

offer and sell, from time to time at its sole discretion, shares of its common stock having aggregate sales proceeds of up to $50.0 million. Jefferies is not 
required to sell any specific amount but acts as the Company’s sales agent using commercially reasonable efforts consistent with its normal trading and 
sales practices. During the year ended December 31, 2023, 115,966 shares of common stock were sold pursuant to the sales agreement with Jefferies, 
resulting in net proceeds of approximately $1.25 million.

Ginkgo Warrants

In June 2019, the Company issued to Ginkgo Bioworks, Inc. (Ginkgo) 422,718 shares of common stock and accompanying Pre-Funded Warrants 

(the Pre-Funded Warrants) to purchase up to an aggregate of 169,874 shares of common stock, at a combined purchase price per share and Pre-Funded 
Warrant of $135. The Pre-Funded Warrants have an exercise price of $135 per share, with $134.85 of such exercise price paid at the closing of the offering. 
The proceeds, net of issuance costs, were approximately $79.9 million, $57.0 million related to the proceeds from sale of the common stock and $22.9 
million related to the proceeds from sale of the Pre-Funded Warrants. The Pre-Funded Warrants may be exercised at any time until all of the Pre-Funded 
Warrants are exercised in full to the extent that, after giving effect to such issuance after exercise, Ginkgo would not beneficially own in excess of 19.99% 
of the number of shares of common stock outstanding immediately after giving effect to the issuance. The Pre-Funded Warrants were classified as a 
component of permanent equity and were recorded at the issuance date using a relative fair value allocation method. The Pre-Funded Warrants are equity 
classified because they are freestanding financial instruments that are legally detachable and separately exercisable from the equity instruments, are 
immediately exercisable, do not embody an obligation for the Company to repurchase its shares, and permit the holders to receive a fixed number of 
common shares upon exercise. In addition, such warrants do not provide any guarantee of value or return. In addition, in connection with the issuance to 
Ginkgo of common stock and Pre-Funded Warrants, the Company expanded its existing collaboration and entered into an agreement with Ginkgo for the 
research and development of engineered microbial therapeutic products. None of the Pre-Funded Warrants have been exercised as of December 31, 2023. 
(See Note 10, Collaboration Agreements: Ginkgo Collaboration).

The Company has reserved for future issuance the following shares of common stock related to the potential exercise of warrants, exercise of stock 

options, and the employee stock purchase plan:

Common stock issuable under pre-funded warrants
Common stock issuable under purchase warrants
Common stock issuable under Ginkgo pre-funded warrants
Options exercisable to purchase common stock
Employee Stock Purchase Plan

Total

F-19

December 31, 2023

2,803,309  
3,921,928  
169,874  
311,199  
19,751  
7,226,061  

 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

(9)

Equity‑based Compensation and Equity Incentive Plans

Equity Plans

The Company currently has four active equity plans. 

The 2015 Equity Incentive Award Plan (2015 Plan) functions as the primary equity plan for the Company. The 2015 Plan includes an “evergreen 

provision” that allows for an annual increase in the number of shares of common stock available for issuance under the 2015 Plan, which annual increase 
will be added on the first day of each fiscal year from 2016 through 2025, inclusive, and will be equal to the lesser of (i) five percent of the shares 
outstanding on the last day of the immediately preceding fiscal year and (ii) such smaller number of shares as determined by the Board of Directors. On 
January 1, 2023, the Company added 222,454 shares to the 2015 Plan pursuant to the “evergreen provision”. The 2015 Plan provides for the granting of a 
variety of stock‑based compensation awards, including stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, 
deferred stock awards, dividend equivalent awards, stock payment awards, performance awards and other stock‑based awards.

The 2017 Stock Incentive Plan (the 2017 Plan) provides for the grant of incentive stock options, non-qualified stock options, restricted and 

unrestricted stock awards and other stock-based awards. 

The 2015 Employee Stock Purchase Plan (ESPP) allows eligible employees to purchase shares of the Company’s common stock at a discount 
through payroll deductions of up to 15% of their eligible compensation, subject to any plan limitations. The ESPP generally provides for set offering 
periods, and at the end of each offering period, employees are able to purchase shares at 85% of the lower of the fair market value of the Company’s 
common stock on the first trading day of the offering period or on the last trading day of the offering period. The Company suspended the ESPP in 2017. In 
December 2019, the Board reactivated the 2015 ESPP and approved an amendment to the ESPP to (i) reduce the permitted payroll deduction and number 
of shares of the Company’s common stock that a participant may purchase per calendar year and offering period under the ESPP and (ii) establish a period 
for enrollment for eligible participants. The reactivation of the 2015 ESPP was effective immediately. The Company’s executive officers are eligible to 
participate in the 2015 ESPP. The ESPP includes an “evergreen provision,” allowing for an annual increase in the number of shares of common stock 
available for issuance. On January 1, 2023, the Company added 44,490 shares to the ESPP pursuant to the “evergreen provision”. There were 34,478 shares 
of common stock purchased under the ESPP during the year ended December 31, 2023.

The 2023 Inducement Equity Incentive Award Plan (the 2023 Inducement Plan) was established as of December 8, 2023 to provide for the granting 

of equity awards to individuals who were not previously employees of Synlogic, or following a bona fide period of non-employment, as an inducement 
material to such individuals’ entering into employment with Synlogic, pursuant to Nasdaq Listing Rule 5635(c)(4). No shares were issued under the 2023 
Inducement Plan during the year ended December 31, 2023.

Stock Options

The weighted average assumptions used in the Black-Scholes option-pricing model for stock options issued to employees and non-employees under 

the 2015 Plan and the 2017 Plan, during the years ended December 31, 2023 and 2022 were:

Employees:
Expected term
Weighted-average, risk-free interest rate
Expected volatility
Dividend yield

Year ended December 31,

2023
6.2 years
3.7%
82.4%
—

2022
6.2 years
2.4%
82.5%
—

F-20

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

The following table summarizes stock option activity under the 2015 and 2017 Plans.

Stock options outstanding

    Weighted    
average

  Weighted    
average
exercise
price

remaining    

    contractual

term
(in years)

Aggregate
intrinsic
 (a)
value
(in thousands)

Number of
options

Outstanding at December 31, 2022
Granted
Exercised
Cancelled/Forfeited
Outstanding at December 31, 2023

482,166     $
305,010      
—      
(174,415 )    
612,761      

54.78      
9.28    
—    
24.94    

9.13      

8.1     $

30  
—  
—  
—  

7.8     $

1,026  

Vested or expected to vest at December 31, 2023
Exercisable at December 31, 2023

612,761     $
311,199     $

9.13      
15.62      

7.8     $
6.9     $

1,026  
464  

(a) The aggregate intrinsic value is calculated as the difference between the exercise price of the options and the fair market value of the underlying common stock for the 
options that were in the money at December 31, 2023 and 2022. 512,972 and 12,364 options were in the money at December 31, 2023 and 2022, respectively.

The weighted average grant date fair value per share of options granted during the years ended December 31, 2023 and 2022 was approximately 

$6.07 and $13.06, respectively. The total fair value of awards that vested during the years ended December 31, 2023 and 2022 was $2.5 million and $1.2 
million, respectively.

As of December 31, 2023, there was approximately $3.2 million of unrecognized share-based compensation for unvested stock option grants which 

is expected to be recognized over a weighted average period of 2.25 years. The total unrecognized share-based compensation cost will be adjusted for 
actual forfeitures as they occur. 

On November 9, 2023, the Company’s board of directors approved a stock option repricing, which repriced certain outstanding stock options held 
by then current employees. There were 539,685 outstanding eligible stock options that were amended to reduce such exercise price to $1.85 per share, the 
current fair market value of the Company’s common stock on the date of the approval of the repricing. Except for the modified exercise price, all other 
terms and conditions of each of the eligible stock options remained in full force and effect. The repricing was recorded as a stock option modification 
whereby the incremental fair value of each option was determined using the Black-Scholes option-pricing model at the date of the modification, and $0.2 
million was recognized related to vested options as incremental equity-based compensation expense during the year ended December 31, 2023. The 
Company is recognizing the remaining $0.2 million of incremental equity-based compensation expense on a straight-line basis over the remaining requisite 
service period of the stock options.

Restricted Common Stock

During the years ended December 31, 2023 and 2022, 10,803 and 50,851 shares of restricted common stock were granted, respectively. 

The following table shows restricted common stock activity:

Unvested at December 31, 2022
Granted
Vested
Forfeited
Unvested at December 31, 2023

F-21

Restricted stock awards

Weighted
average
grant date
fair value
(per share)

28.42  
9.30  
30.36  
20.46  
25.24  

Number of
shares

55,005     $
10,803      
(14,643 )    
(15,119 )    
36,046     $

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
   
 
 
 
 
 
   
   
 
   
   
       
   
       
   
       
   
 
 
     
     
     
   
   
   
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
   
 
 
 
   
 
   
   
   
   
   
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

The total fair value of shares that vested during the years ended December 31, 2023 and 2022 was $0.4 million and $0.2 million, respectively.

As of December 31, 2023, there was approximately $0.6 million of unrecognized share-based compensation related to restricted stock awards 

granted, which is expected to be recognized over a weighted average period of 2.0 years. The total unrecognized share-based compensation cost will be 
adjusted for actual forfeitures as they occur. 

Employee Stock Purchase Plan

The ESPP is considered a compensatory plan with the related compensation expense recognized over the six-month offering periods. The 

compensation expense for the years ended December 31, 2023 and December 31, 2022 was less than $0.1 million in both years. 

Equity Compensation

The Company has recorded total equity‑based compensation expense of approximately $2.8 million and $3.6 million, during the years ended 
December 31, 2023 and 2022, respectively. Equity compensation during the years ended December 31, 2023 and 2022 is derived from stock options, 
restricted stock awards, and the ESPP. 

The following table summarizes equity‑based compensation expense within the Company’s consolidated statements of operations and 

comprehensive loss for the years ended December 31, 2023 and 2022 (in thousands):

Research and development
General and administrative

Years ended December 31,
2022
2023

  $

  $

1,024     $
1,782      
2,806     $

1,565  
2,074  
3,639  

The following table summarizes equity‑based compensation expense by type of award for the years ended December 31, 2023 and 2022 (in 

thousands):

Stock options
Restricted stock awards
ESPP

(10) Collaboration Agreements

Roche Collaboration

Years ended December 31,
2022
2023

2,354     $
362      
90      
2,806     $

3,168  
396  
75  
3,639  

  $

  $

In June 2021, the Company entered into a Pilot Collaboration and Option Agreement (the Roche Collaboration and Option Agreement) with F. 

Hoffmann-La Roche Ltd (Roche Basel) and Hoffmann-La Roche Inc. (Roche US, and together with Roche Basel, Roche). Under the terms of the Roche 
Collaboration and Option Agreement, the Company and Roche will seek to collaborate to research and pre-clinically develop Synthetic Biotics for 
addressing an undisclosed novel target for the treatment of inflammatory bowel disease (the Product Candidate). 

Pursuant to the Roche Collaboration and Option Agreement, Roche agreed to pay the Company, an upfront, nonrefundable technology access fee of 

$1.0 million, which the Company received in July 2021. In addition, the Company was eligible to receive up to $5.0 million in milestone payments upon 
the achievement of certain success criteria. Following the research period, Roche holds an exclusive option right (the Option) to negotiate a definitive 
Collaboration and License Agreement (CLA) for further development and commercialization of the Product Candidate. 

Pursuant to the Roche Collaboration and Option Agreement, during the term of such agreement, each party has granted to the other party a non-
exclusive, non-transferrable, non-sublicensable, royalty-free right and license to certain intellectual property and know-how controlled by such party, solely 
as necessary for the party to perform its obligations under the Roche Collaboration and 

F-22

 
 
 
 
 
 
 
 
 
 
   
 
   
 
 
 
 
 
 
 
 
   
 
   
   
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

Option Agreement. The parties will establish a Joint Research Committee (JRC) to oversee and manage the execution of the underlying study plan for the 
Roche Collaboration and Option Agreement. 

The Roche Collaboration and Option Agreement includes various representations, warranties, covenants, indemnities, and other customary 
provisions. Roche may terminate the Roche Collaboration and Option Agreement without cause immediately upon written notice where certain success 
criteria have been met for parts of the study plan, or upon ninety (90) days’ prior written notice to the Company. Either party may terminate the Roche 
Collaboration and Option Agreement in the event of an uncured material breach of the other party.

The research and development was estimated to be performed by the Company for approximately two years according to three phases of research as 
defined in the research plan. The Company was eligible to receive milestone payments from Roche upon the achievement of success criteria for respective 
milestones. 

The Company assessed this arrangement in accordance with ASC 606, Revenue from Contracts with Customers, and concluded that the contract 

counterparty, Roche, is a customer. The Company identified the following material promises made by the Company to Roche at the outset of the 
arrangement: (1) a non-exclusive royalty-free research and development license; (2) research and development services for pre-clinical activities under the 
research plan; (3) implicit renewal options created by Roche’s decision not to terminate the contract; (4) the Company’s participation on the JRC; and (5) 
an exclusive right to negotiate a definitive CLA for further development and commercialization of the Product Candidate. The Company determined that 
the license and research and development activities were not distinct from one another, as the license has limited value without the performance of research 
and development activities. The Company’s participation on the JRC was determined to be quantitatively and qualitatively immaterial and therefore is 
excluded from performance obligations. As such, the Company determined that the promises associated with the license and research and development 
services should be combined into a single performance obligation. 

The Company next evaluated the milestone payments relating to the three phases of research as defined in the research plan and the option to 

negotiate and enter into the CLA, to determine whether they provide Roche with any material rights. The Company concluded that the option was not 
issued at a significant and incremental discount, and therefore do not provide material rights. As such, they were excluded as performance obligations at the 
outset of the arrangement. If Roche elects to exercise the options, the additional consideration will be added to the transaction price and allocated to the 
resulting performance obligations.

Based on these assessments, the Company identified one performance obligation at the outset of the Roche Collaboration and Option Agreement, 

which consists of: (1) the non-exclusive license and (2) the research and development activities.

At the outset of the arrangement, the transaction price included only the $1.0 million up-front consideration received and which was allocated to the 

single performance obligation. The milestone payments that may be received are excluded from the transaction price until each respective milestone has 
been achieved. The Company will reevaluate the transaction price at the end of each reporting period and as uncertain events are resolved or other changes 
in circumstances occur, and, if necessary, adjust its estimate of the transaction price.

In June 2021, the Company began work on the research and development services for the first phase of the research plan and the $1.0 million 

upfront payment was recognized over the time of the first phase of the research plan. In September 2021, the Company completed the research and 
development services for the first phase of the research plan and achieved a milestone payment of $1.0 million, which was paid by Roche in November 
2021. At this time, the milestone payment was allocated to a new performance obligation consisting of the underlying research and development services to 
be performed over the second phase of the research plan. In August 2022, the Company completed the research and development services for the second 
phase of the research plan and achieved a milestone payment of $1.5 million, which was paid by Roche in October 2022. At this time, the milestone 
payment was allocated to a new performance obligation consisting of the underlying research and development services to be performed over the third 
phase of the research plan. Upon the Company’s completion of these activities and subject to Roche’s termination right, the additional milestone payments 
based on the achievement of specific events outlined in the Roche Collaboration and Option Agreement will become due. 

In October 2023, the Company achieved its third pre-specified research milestone under the terms of the Roche Collaboration and Option 

Agreement and earned a third milestone payment of $2.5 million, which was paid by Roche in December 2023.

F-23

 
 
 
 
 
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

Revenue associated with performance obligations under the Roche Collaboration and Option Agreement are recognized as the research and 
development services are provided using an input method, according to the full-time equivalents incurred. The transfer of control occurs over time and, in 
management’s judgment, is the best measure of progress towards satisfying the performance obligation. The amounts received that have not yet been 
recognized as revenue are recorded in deferred revenue on the Company’s consolidated balance sheet.

The Company recognized $3.4 million and $1.2 million for the years ended December 31, 2023 and 2022, respectively, as collaboration revenue in 
the Company’s consolidated statements of operations and comprehensive loss. There was no deferred revenue from the collaboration as of December 31, 
2023. The Roche Collaboration and Option Agreement concluded after the last milestone was achieved by the Company in October 2023. Subsequently, 
Roche did not exercise its exclusive option to enter into a licensing and collaboration agreement for further development and commercialization of the 
product candidate.

Ginkgo Collaboration

In 2017, the Company established a technology collaboration with Ginkgo. In June 2019, in connection with the issuance to Ginkgo of an aggregate 
of 422,718 shares of common stock and Pre-Funded Warrants to purchase an aggregate of 169,874 common stock (See Note 8), the Company expanded its 
collaboration and entered into an agreement with Ginkgo for the research and development of engineered microbial therapeutic products. Under the 2019 
expanded agreement, the Company made a prepayment to Ginkgo of $30.0 million for its foundry services that will be provided to the Company over an 
initial term of five years. The current and non-current balances relating to the prepayment of foundry services is recorded in prepaid expenses and other 
current assets and prepaid research and development, net of current portion, respectively, on the December 31, 2023 consolidated balance sheet. At 
December 31, 2023, the Company had remaining balances of $0.3 million and $4.9 million of current and non-current pre-paid research and development 
costs related to this transaction, respectively. Upon the expiration of such initial term and, if applicable, an additional period, any portion of the prepayment 
that has not been used to purchase services from Ginkgo will be retained by Ginkgo.

(11) Net Loss per Share

The following table sets forth the computation of basic and diluted net loss per share (in thousands, except for share and per share amounts):

Numerator:
Net loss

Denominator:
Weighted-average common shares outstanding - basic and diluted

Net loss per share - basic and diluted

2023

2022

  $

  $

(57,282 )   $

(66,147 )

6,502,279      
(8.81 )   $

4,781,696  

(13.83 )

The Company’s potentially dilutive shares, which include purchase warrants, outstanding stock options, unvested restricted common stock and 

potential shares issuable under the ESPP, are considered to be common share equivalents and are only included in the calculation of diluted net loss per 
share when their effect is dilutive. 

The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the calculation of the 

diluted net loss per share attributable to common stockholders for the period indicated because including them would have had an anti-dilutive effect.

Purchase warrants
Unvested restricted common stock awards
Outstanding options to purchase common stock
Potential shares issuable under the ESPP

(12)

Income Taxes

F-24

As of December 31,

2023
3,921,928      
36,046      
612,761      
19,751      

2022

—  
55,005  
482,166  
3,508  

 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
     
   
   
 
 
 
 
 
 
 
 
 
 
   
   
   
   
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

During the years ended December 31, 2023 and 2022, the Company recorded no income tax benefits for the net operating losses incurred due to its 

uncertainty of reclaiming a benefit for those losses. 

Deferred taxes are recognized for temporary differences between the basis of assets and liabilities for financial statement and income tax purposes. 

Deferred tax assets consist of the following (in thousands):

Deferred tax assets:

Net operating loss carryforwards
Tax credit carryforwards
Accrued expenses
Property and equipment
Lease liabilities
Equity compensation
Amortizable intangibles
Amortizable research expenditures 
Other

(1)

Gross deferred tax assets

Deferred tax liabilities:
Right of use assets

Gross deferred tax liabilities

Valuation allowance

Net deferred tax assets

December 31,

2023

2022

  $

  $

87,396  
10,401  
84  
1,113  
4,718  
3,270  
1,100  
20,202  
77  
128,361  

(3,306 )    
(3,306 )    
(125,055 )    
  $

—  

  $

81,803  
9,118  
127  
888  
5,541  
2,516  
1,165  
12,000  
363  
113,521  

(3,922 )
(3,922 )
(109,599 )
—  

(1) Under the Tax Cuts and Jobs Act (TCJA), research and experimental (R&D) expenditures are capitalized and amortized under section 174 for tax years 
beginning after December 31, 2021. These costs are amortized for tax purposes over 5 years since the R&D was performed in the U.S. The unamortized 
balance of these costs is presented as a deferred tax asset in the table above.

Management of the Company has evaluated the positive and negative evidence bearing upon the realizability of the Company’s deferred tax assets, 
which are comprised principally of net operating loss carryforwards, and determined that it is more likely than not that the Company will not recognize the 
benefits of the deferred tax assets. As a result, a full valuation allowance of approximately $125.1 million and $109.6 million was established at December 
31, 2023 and 2022, respectively.

A reconciliation of the statutory federal income tax rate to the Company’s effective income tax rate is as follows:

U.S. federal statutory rate
State income taxes, net of federal benefit
Other permanent differences
Tax credits
Other items
Net change in valuation allowance
Effective income tax rate

Years ended December 31,
2023
Tax Rate

2022
Tax Rate

21 %   
6 %   
(2 )%   
2 %   
0 %   
(27 )%   
—      

21 %
6 %
(1 )%
3 %
0 %
(29 )%
—  

A roll-forward of the valuation allowance for the years ended December 31, 2023 and 2022 is as follows (in thousands):

Balance at beginning of year
Increase in valuation allowance
Balance at end of year

F-25

Years ended December 31,

2023

2022

  $

  $

(109,599 )   $
(15,456 )    
(125,055 )   $

(90,477 )
(19,122 )
(109,599 )

 
 
 
 
 
 
 
 
 
 
 
 
 
     
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
 
     
   
   
   
   
 
 
 
 
 
 
 
 
   
 
 
 
   
 
   
   
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

As of December 31, 2023, the Company had federal net operating loss carryforwards that may be available to reduce future taxable income of 
$323.5 million. Of the $323.5 million of federal net operating loss carryforwards, $79.4 million will expire on various dates from 2034 to 2037. The 
remaining $244.1 million of federal net operating loss carryforwards do not expire. The Company also had state net operating loss carryforwards that may 
be available to reduce future taxable income of $308.0 million for the period ended December 31, 2023. The state net operating loss carryforwards begin to 
expire in 2029. In addition, as of December 31, 2023, the Company had federal and state research and development tax credit carryforwards available to 
reduce future tax liabilities of $7.1 million and $4.2 million, respectively. 

On August 16, 2022, President Biden signed the Inflation Reduction Act of 2022 into law which contained provisions that include a 15% corporate 
minimum tax effective for taxable years beginning after December 31, 2022 and a 1% excise tax on certain stock buybacks after December 31, 2022. The 
Company expects the impact of these provisions to be immaterial.

Pursuant to Section 382 of the Internal Revenue Code of 1986 (IRC), certain substantial changes in the Company’s ownership may result in a 
limitation on the amount of net operating loss (NOL) carryforwards and research and development credit (R&D credit) carryforwards that may be used in 
future years. Utilization of the NOL and R&D credit carryforwards may be subject to a substantial annual limitation under Section 382 of the IRC due to 
ownership change limitations that have occurred previously or that could occur in the future. These ownership changes may limit the amount of NOL and 
R&D credit carryforwards that can be utilized annually to offset future taxable income and tax. The Company has not completed a study to assess whether 
an ownership change has occurred, or whether there have been multiple ownership changes since its formation, due to the significant complexity and 
related costs associated with such a study. There could be additional ownership changes in the future that may result in additional limitations on the 
utilization of NOL carryforwards and credits.

The Company is required to determine whether a tax position of the Company is more likely than not to be sustained upon examination, including 

resolution of any related appeals of litigation processes, based on the technical merits of the position. For tax positions meeting the more likely than not 
threshold, the tax amount recognized in the financial statements is reduced by the largest benefit that has a greater than fifty percent likelihood of being 
realized upon the ultimate settlement with the relevant taxing authority. The Company has not recognized any liability for unrecognized tax benefits as of 
December 31, 2023. The Company’s policy is to record interest and penalties related to unrecognized tax benefits on the income tax expense line in the 
consolidated statement of operations. There are no interest or penalties accrued at December 31, 2023 and 2022.

The Company files tax returns, on an entity-level basis, 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 tax examinations. 
Tax years from 2020 to the present are open to examination under the statute. The Company’s net operating losses and other attributes generated in a closed 
tax year may still be adjusted to determine the amount of carryforward deduction available in an open year under examination. 

(13)   Share Repurchase

On November 25, 2022, the Company entered into a definitive share repurchase agreement with a stockholder, as part of a privately negotiated 

transaction, to repurchase 279,792 shares of common stock held by them for an aggregate purchase price of $2.5 million, or $9.00 per share. This 
repurchase was completed on November 28, 2022. 

Repurchased shares are held as treasury stock at cost until they are retired or re-issued.  There were no retirements or re-issuances of treasury stock 

during the year ended December 31, 2023.

(14) Leases

Operating Leases

In July 2017, the Company entered into an agreement to lease approximately 41,346 square feet of laboratory and office space at 301 Binney Street 

in Cambridge, Massachusetts. Annual rent is approximately $3.4 million. The ten-year lease commenced in January 2018 and contains provisions for a 
free-rent period, annual rent increases and an allowance for tenant improvements. The Company is responsible for real estate taxes, maintenance, and other 
operating expenses applicable to the leased premises. The Company has paid for tenant improvements of approximately $2.9 million. Additionally, the 
Company has capitalized approximately $6.6 million of landlord-funded tenant improvements. The Company was deemed to be the accounting owner of 
the tenant improvements primarily because it was responsible for project cost overruns, and as such, the amounts were recorded as a leasehold 
improvement. The landlord-funded tenant improvement allowance is being amortized as a reduction to lease expense ratably over the lease term. In 
conjunction with the lease, the Company established a letter of credit of approximately $1.0 million secured by cash balances included 

F-26

 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

in restricted cash. Variable payments based on our portion of the operating expenses, including real estate taxes and insurance, are recorded as a period 
expense when incurred. The Company has an option to extend the term by five years and an option to terminate the agreement if a similar agreement is 
executed with the landlord or an affiliate of the landlord. Neither option is reasonably certain of exercise and both are excluded from the lease liability 
calculation.

During the year ended December 31, 2018, the Company entered into an agreement (the First SOW) with Azzur Group, LLC (Azzur) whereby 
Azzur agreed to provide the Company with access to, and the use of, an approximately 700 square foot cleanroom space to be constructed in Waltham, 
Massachusetts (the Azzur Suite), for a period of 44 months, from May 1, 2019 to December 31, 2022 (the Initial Term). In April 2021, Synlogic entered 
into a new agreement (the Second SOW) with Azzur which replaced the First SOW. Pursuant to the Second SOW, Synlogic was granted access to, and use 
of, the Azzur Suite for a period of 20 months, from May 2021 to December 2022 (the Second Term). On January 21, 2022, the Company entered into two 
agreements with Azzur. Pursuant to the first of the agreements (the Third SOW), the Company has agreed to pay Azzur $0.7 million to renovate and 
upgrade the cleanroom space at Azzur for the Company’s expanded use. The second of the agreements (the Fourth SOW) replaces the Second SOW that 
the Company entered into with Azzur in April 2021. The Fourth SOW extends the term of the lease, for the period beginning January 2022 through March 
2023 (the Third Term). In November 2022, the Company entered into a new agreement (the Fifth SOW) with Azzur that extended the term of the lease, for 
the period beginning April 2023 through December 2023 (the Fourth Term). The Fifth SOW contains two options to extend the lease, the first option goes 
through June 2024, and the second option goes through December 2024. The Company determined that the agreement contained an embedded lease 
because the Company controls the use of the Azzur Suite. Accordingly, the fixed and in-substance fixed consideration under the agreement was used to 
measure the ROU asset and lease liability at the effective date. In December 2023, the Company signed an addendum to exercise the First and Second 
Option to extend the lease as part of the Fifth SOW discussed above. Part of the addendum agreed to new payment terms that supersede the terms per the 
Fifth SOW with Azzur. The ROU asset and lease liability are subsequently remeasured to reflect the impact of each subsequent modification.

Leases classified as operating leases are included in operating lease ROU assets, current operating lease liabilities and noncurrent operating lease 

liabilities in our consolidated balance sheets. The operating lease right-of-use asset and operating lease liability represents the Binney Street lease and the 
Azzur Suite lease. Cash paid for amounts included in the present value of operating lease liabilities was $5.6 and $5.5 million during the years ended 
December 31, 2023 and 2022, respectively, which is included in operating cash flows.

The components of lease cost for operating leases for the years ended December 31, 2023 and 2022 were (in thousands):

Operating leases
Operating lease cost
Variable lease cost
Total lease cost

For the year ended December 31,

2023

2022

$

$

4,869     $
1,583    
6,452     $

4,812  
1,409  
6,221  

The right-of-use asset for the operating lease is disclosed on the consolidated balance sheets.

The weighted average remaining lease term and the weighted average discount rate for operating leases were:

Weighted average discount rate
Weighted average remaining lease term (years)

For the year ended December 31,

2023

2022

8.3 % 
4.2    

8.3 %
5.1  

F-27

 
 
 
 
 
   
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

The following table reconciles the undiscounted cash flows for the operating leases at December 31, 2023 to the operating lease liabilities recorded 

on the balance sheet: December 31, 2023

Maturity of lease liabilities

2024
2025
2026
2027
2028
Thereafter

Total lease payments
Less: imputed interest
Total lease liabilities
Current lease liabilities
Long-term lease liabilities

$

$

Operating Leases
(in thousands)

5,977  
3,791  
3,905  
4,022  
2,667  
—  
20,362  
3,091  
17,271  
4,780  
12,491  

The lease cost for finance leases during the years ended December 31, 2023 and 2022, and the finance lease liability at December 31, 2023, were not 

material.

(15) Commitments and Contingencies

In the ordinary course of business, the Company may be subject to legal proceedings, claims and litigation as the Company operates in an industry 
susceptible to patent legal claims. The Company accounts for estimated losses with respect to legal proceedings and claims when such losses are probable 
and estimable. Legal costs associated with these matters are expensed when incurred. The Company is not currently a party to any material legal 
proceedings. 

(16) Employee Benefits

The Company has a defined contribution 401(k) plan for eligible employees. Employees are eligible to participate in the plan beginning on their date 

of hire. Under the terms of the plan, employees may make voluntary contributions as a percentage of compensation. The Company started to match 
employee contributions effective January 1, 2019. The Company matched 50% of the employee contributions to the 401(k) plan up to a maximum of 4% of 
the participating employee’s eligible earnings, resulting in a maximum company match of 2% of the participating employee’s eligible earnings, and subject 
to certain additional statutory dollar limitations. In 2021, the Company increased the match to 50% of the employee contributions up to a maximum of 6% 
of the participating employee’s eligible earnings, resulting in a maximum company match of 3% of the participating employee’s eligible earnings, and 
subject to certain additional statutory dollar limitations. For the years ended December 31, 2023 and 2022, the Company made $0.3 million and $0.5 
million contributions to the plan, respectively. 

(17) Related-Party Transactions

In June 2019, the Company expanded its collaboration and entered into an agreement with Ginkgo for the research and development of engineered 

microbial therapeutic products. As of December 31, 2023, Ginkgo owns 422,718 shares of the Company’s outstanding common stock. See Note 10, 
Collaboration Agreements: Ginkgo Collaboration. 

Under the agreement the Company made a prepayment to Ginkgo of $30.0 million for its foundry services that will be provided to the Company 

over an initial term of five years. At December 31, 2023, the Company had remaining balances of $0.3 million and $4.9 million of current and non-current 
pre-paid research and development costs related to this transaction, respectively. For the year ended December 31, 2023, the Company used $3.1 million of 
the pre-paid research and development expenses.

(18)

Subsequent Events

In February 2024, the Company and its board of directors decided to discontinue the Synpheny-3 trial and significantly reduce its workforce and as a 

result have made the decision to evaluate strategic options for the Company with a goal to enhance stockholder value, including the possibility of a merger 
or sale of the Company. The Company expects to devote significant time and resources to 

F-28

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SYNLOGIC, INC. AND SUBSIDIARIES

Notes to Consolidated Financial Statements (continued) 

identifying and evaluating strategic alternatives, however, there can be no assurance that such activities will result in any agreements or transactions that 
will enhance shareholder value. Further, any strategic transaction that is completed ultimately may not deliver the anticipated benefits or enhance 
shareholder value.

The Company is currently evaluating the impact that this subsequent event will have on the financial statements for the interim period ending March 
31, 2024. However, it expects that material restructuring charges will be recorded in addition to material impairment charges, including (but not limited to) 
impairment charges relating to the balances of property and equipment, net, prepaid research and development costs and right of use assets – operating 
lease.

F-29

 
 
Exhibit 10.6

SYNLOGIC, INC.
2023 INDUCEMENT EQUITY INCENTIVE AWARD PLAN

ARTICLE 1.

PURPOSE

The purpose of the Synlogic, Inc. 2015 Inducement Equity Incentive Award Plan (as it may be amended from time to 
time,  the  “Plan”)  is  to  promote  the  success  and  enhance  the  value  of  Synlogic,  Inc.  (the  “Company”)  by  enhancing  the 
Company’s ability to attract new Employees who are expected to make important contributions to the Company and by providing 
these individuals with equity ownership opportunities that are intended to better align the interests of such persons with those of 
the  Company’s  stockholders.  The  Company  intends  that  the  Plan  be  reserved  for  persons  whom  the  Company  may  issue 
securities without stockholder approval as an inducement pursuant to Listing Rule 5635(c)(4) of the corporate governance rules 
of the Nasdaq Stock Market.

ARTICLE 2.

DEFINITIONS AND CONSTRUCTION

Wherever  the  following  terms  are  used  in  the  Plan  they  shall  have  the  meanings  specified  below,  unless  the  context 

clearly indicates otherwise.  The singular pronoun shall include the plural where the context so indicates.

2.1.“Administrator” shall mean the entity that conducts the general administration of the Plan as provided in Article 13 

hereof.  

2.2.“Affiliate” shall mean any Parent or Subsidiary.

2.3.“Applicable  Accounting  Standards”  shall  mean  Generally  Accepted  Accounting  Principles  in  the  United  States, 
International  Financial  Reporting  Standards  or  such  other  accounting  principles  or  standards  as  may  apply  to  the  Company’s 
financial statements under United States federal securities laws from time to time.

2.4.“Applicable  Law”  shall  mean  any  applicable  law,  including  without  limitation,  (i)  provisions  of  the  Code,  the 
Securities  Act,  the  Exchange  Act  and  any  rules  or  regulations  thereunder;  (ii)  corporate,  securities,  tax  or  other  laws,  statutes, 
rules, requirements or regulations, whether federal, state, local or foreign; and (iii) rules of any securities exchange or automated 
quotation system on which the Shares are listed, quoted or traded.

2.5.“Award” shall mean an Option, a Restricted Stock award, a Restricted Stock Unit award, a Performance Award, a 
Dividend  Equivalents  award,  a  Deferred  Stock  award,  a  Deferred  Stock  Unit  award,  a  Stock  Payment  award  or  a  Stock 
Appreciation Right, which may be awarded or granted under the Plan (collectively, “Awards”).

 
2.6.“Award Agreement” shall mean any written notice, agreement, terms and conditions, contract or other instrument or 
document  evidencing  an  Award,  including  through  electronic  medium,  which  shall  contain  such  terms  and  conditions  with 
respect to an Award as the Administrator shall determine consistent with the Plan.

2.7.“Board” shall mean the Board of Directors of the Company.

2.8.“Cause” shall mean, unless such term or an equivalent term is otherwise defined by the applicable Award Agreement 
or other written agreement between a Holder and the Company applicable to an Award, the occurrence of any of the following 
events:    (i)  a  Holder’s  act  of  personal  dishonesty,  willful  violation  of  any  law,  rule  or  regulation  (other  than  minor  traffic 
violations  or  similar  offenses),  or  breach  of  fiduciary  duty  involving  personal  profit,  (ii)  a  Holder’s  failure  to  satisfactorily 
perform such Holder’s duties and responsibilities for the Company or any Affiliate, (iii) a Holder’s conviction of, or plea of nolo 
contender to, any felony or a crime involving moral turpitude, (iv) a Holder has engaged in negligence or willful misconduct in 
the performance of such Holder’s duties, including, but not limited to, willfully refusing without proper legal reason to perform 
such  Holder’s  duties  and  responsibilities,  (v)  a  Holder  has  materially  breached  any  corporate  policy  or  code  of  conduct 
established by the Company or any Subsidiary as such policies or codes may be adopted from time to time, (vi) a Holder has 
violated  the  terms  of  any  confidentiality,  nondisclosure,  intellectual  property,  nonsolicitation,  noncompetition,  proprietary 
information or inventions agreement, or any other agreement between such Holder and the Company or any Subsidiary related to 
such  Holder’s  service  with  the  Company  or  any  Subsidiary,  or  (vii)  a  Holder  has  engaged  in  conduct  that  is  likely  to  have  a 
deleterious  effect  on  the  Company  or  any  Subsidiary  or  their  legitimate  business  interests,  including,  but  not  limited  to,  their 
goodwill and public image. The determination that a Holder’s Termination of Service is either for Cause or without Cause shall 
be made by the Company in its sole discretion.  Any determination by the Company that a Holder experienced a Termination of 
Service by reason of dismissal without Cause for the purposes of outstanding Awards held by such Holder shall have no effect 
upon any determination of the rights or obligations of the Company or such Holder for any other purpose.

2.9.“Change in Control” shall mean the occurrence, in a single transaction or in a series of related transactions, of any 

one or more of the following events:

(a) A  transaction  or  series  of  transactions  (other  than  an  offering  of  Common  Stock  to  the  general  public 
through a registration statement filed with the Securities and Exchange Commission) whereby any “person” or related “group” of 
“persons”  (as  such  terms  are  used  in  Sections  13(d)  and  14(d)(2)  of  the  Exchange  Act)  (other  than  the  Company,  any  of  its 
subsidiaries,  an  employee  benefit  plan  maintained  by  the  Company  or  any  of  its  subsidiaries  or  a  “person”  that,  prior  to  such 
transaction, directly or indirectly controls, is controlled by, or is under common control with, the Company) directly or indirectly 
acquires  beneficial  ownership  (within  the  meaning  of  Rule  13d-3  under  the  Exchange  Act)  of  securities  of  the  Company 
possessing more than 50% of the total combined voting power of the Company’s securities outstanding immediately after such 
acquisition; or

the Board together with any new Director(s) (other than a 

(b) During any period of two consecutive years, individuals who, at the beginning of such period, constitute 

2

 
Director designated by a person who shall have entered into an agreement with the Company to effect a transaction described in 
Section 2.9(a) or 2.9(c)) whose election by the Board or nomination for election by the Company’s stockholders was approved by 
a vote of at least two-thirds of the Directors then still in office who either were Directors at the beginning of the two-year period 
or whose election or nomination for election was previously so approved, cease for any reason to constitute a majority thereof; or

(c)

The consummation by the Company (whether directly involving the Company or indirectly involving the 
Company through one or more intermediaries) of (x) a merger, consolidation, reorganization, or business combination or (y) a 
sale  or  other  disposition  of  all  or  substantially  all  of  the  Company’s  assets  in  any  single  transaction  or  series  of  related 
transactions or (z) the acquisition of assets or stock of another entity, in each case other than a transaction:

(i) which  results  in  the  Company’s  voting  securities  outstanding  immediately  before  the  transaction 
continuing  to  represent  (either  by  remaining  outstanding  or  by  being  converted  into  voting  securities  of  the  Company  or  the 
person  that,  as  a  result  of  the  transaction,  controls,  directly  or  indirectly,  the  Company  or  owns,  directly  or  indirectly,  all  or 
substantially all of the Company’s assets or otherwise succeeds to the business of the Company (the Company or such person, the 
“Successor Entity”)) directly or indirectly, at least a majority of the combined voting power of the Successor Entity’s outstanding 
voting securities immediately after the transaction, and

(ii) after which no person or group beneficially owns voting securities representing 50% or more of the 
combined voting power of the Successor Entity; provided, however, that no person or group shall be treated for purposes of this 
Section 2.9(c)(ii) as beneficially owning 50% or more of the combined voting power of the Successor Entity solely as a result of
the voting power held in the Company prior to the consummation of the transaction;  or

(d)

The Company’s stockholders approve a liquidation or dissolution of the Company.

Notwithstanding the foregoing, if a Change in Control constitutes a payment event with respect to any portion of an Award that 
provides  for  the  deferral  of  compensation  and  is  subject  to  Section  409A  of  the  Code,  the  transaction  or  event  described  in 
subsection (a), (b), (c) or (d) with respect to such Award (or portion thereof) must also constitute a “change in control event,” as 
defined in Treasury Regulation Section 1.409A-3(i)(5) to the extent required by Section 409A.

The Committee shall have full and final authority, which shall be exercised in its discretion, to determine conclusively whether a 
Change in Control of the Company has occurred pursuant to the above definition, and the date of the occurrence of such Change 
in  Control  and  any  incidental  matters  relating  thereto;  provided  that  any  exercise  of  authority  is  in  conjunction  with  a 
determination of whether a Change in Control is a “change in control event” as defined in Treasury Regulation Section 1.409A-
3(i)(5) shall be consistent with such regulation.

3

 
2.10.“Code” shall mean the Internal Revenue Code of 1986, as amended from time to time, together with the regulations 

and official guidance promulgated thereunder, whether issued prior or subsequent to the grant of any Award.

2.11.“Committee”  shall  mean  the  Compensation  Committee  of  the  Board  (as  constituted  in  compliance  with  Rule 
5605(d)(2) of the Nasdaq Listing Rules) in order to comply with the exemption from the stockholder approval requirement for 
“inducement grants” provided under Rule 5636(c)(4) of the Nasdaq Listing Rules, appointed as provided in Section 13.1 hereof.

2.12.“Common Stock” shall mean the common stock of the Company, par value $0.001 per share.

2.13.“Company” shall have the meaning set forth in Article 1 hereof.

2.14.“Covered Employee” shall mean any Employee who is, or could be, a “covered employee” within the meaning of 

Section 162(m) of the Code.

2.15.“Deferred Stock” shall mean a right to receive Shares awarded under Section 10.4 hereof.

2.16.“Deferred Stock Unit” shall mean a right to receive Shares awarded under Section 10.5 hereof.

2.17.“Director” shall mean a member of the Board, as constituted from time to time.

2.18.“Dividend Equivalent” shall mean a right to receive the equivalent value (in cash or Shares) of dividends paid on 

Shares, awarded under Section 10.2 hereof.

2.19.“DRO”  shall  mean  a  “domestic  relations  order”  as  defined  by  the  Code  or  Title  I  of  the  Employee  Retirement 

Income Security Act of 1974, as amended from time to time, or the rules thereunder.

2.20.“Effective Date” shall mean September 30, 2015.

2.21.“Eligible Individual” shall mean any person who is an Employee.

2.22.“Employee”  shall  mean  any  officer  or  other  employee  (as  determined  in  accordance  with  Section  3401(c)  of  the 

Code and the Treasury Regulations thereunder) of the Company or any Affiliate.

2.23.“Equity Restructuring” shall mean a nonreciprocal transaction between the Company and its stockholders, such as a 
stock dividend, stock split, spin-off, rights offering or recapitalization through a large, nonrecurring cash dividend, that affects the 
number  or  kind  of  Shares  (or  other  securities  of  the  Company)  or  the  share  price  of  Common  Stock  (or  other  securities)  and 
causes a change in the per share value of the Common Stock underlying outstanding stock-based Awards.

4

 
2.24.“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended from time to time.

2.25.“Fair Market Value” shall mean, as of any given date, the value of a Share determined as follows:

(a)

If  the  Common  Stock  is  (i)  listed  on  any  established  securities  exchange  (such  as  the  New  York  Stock 
Exchange,  the  Nasdaq  Global  Market,  the  Nasdaq  Capital  Market  and  the  Nasdaq  Global  Select  Market),  (ii)  listed  on  any 
national  market  system  or  (iii)  listed,  quoted  or  traded  on  any  automated  quotation  system,  its  Fair  Market  Value  shall  be  the 
closing sales price for a Share as quoted on such exchange or system for such date or, if there is no closing sales price for a Share 
on the date in question, the closing sales price for a Share on the last preceding date for which such quotation exists, as reported 
in The Wall Street Journal or such other source as the Administrator deems reliable;

(b)

If  the  Common  Stock  is  not  listed  on  an  established  securities  exchange,  national  market  system  or 
automated quotation system, but the Common Stock is regularly quoted by a recognized securities dealer, its Fair Market Value 
shall be the mean of the high bid and low asked prices for such date or, if there are no high bid and low asked prices for a Share 
on  such  date,  the  high  bid  and  low  asked  prices  for  a  Share  on  the  last  preceding  date  for  which  such  information  exists,  as 
reported in The Wall Street Journal or such other source as the Administrator deems reliable; or

If  the Common Stock  is  neither  listed  on  an  established  securities  exchange,  national market system or 
automated quotation system nor regularly quoted by a recognized securities dealer, its Fair Market Value shall be established by 
the Administrator in good faith.

(c)

2.26.“Good Reason” shall mean, unless such term or an equivalent term is otherwise defined by the applicable Award 
Agreement or other written agreement between a Holder and the Company applicable to an Award, with respect to any particular 
Holder,  the  Holder’s  resignation  from  all  positions  he  or  she  then-holds  with  the  Company  if  (A)  without  Holder’s  written 
consent (I) there is a material reduction of the Holder’s base salary; provided, however, that a material reduction in the Holder’s 
base salary pursuant to a salary reduction program affecting all or substantially all of the employees of the Company and that 
does not adversely affect Holder to a greater extent than other similarly situated employees shall not constitute Good Reason; or 
(II) the Holder is required to relocate his or her primary work location to a facility or location that would increase the Holder’s 
one way commute distance by more than fifty (50) miles from the Holder’s primary work location as of immediately prior to such 
change, (B) the Holder provides written notice outlining such conditions, acts or omissions to the Company’s General Counsel 
within thirty (30) days immediately following such material change or reduction, (C) such material change or reduction is not 
remedied by the Company within thirty (30) days following the Company’s receipt of such written notice and (D) the Holder’s 
resignation is effective not later than thirty (30) days after the expiration of such thirty (30) day cure period.

2.27.“Holder” shall mean a person who has been granted an Award.

5

 
2.28.“Incentive Stock Option” shall mean an Option that is intended to qualify as an incentive stock option and conforms 

to the applicable provisions of Section 422 of the Code.

2.29.“Non-Qualified Stock Option” shall mean an Option that is not intended to qualify as an Incentive Stock Option.

2.30.“Option”  shall  mean  a  right  to  purchase  Shares  at  a  specified  exercise  price,  granted  under  Article  6  hereof.  

Options granted under the Plan shall only be Non-Qualified Stock Options.

2.31.“Option Term” shall have the meaning set forth in Section 6.4 hereof.

2.32.“Parent”  shall  mean  any  entity  (other  than  the  Company),  whether  domestic  or  foreign,  in  an  unbroken  chain  of 
entities  ending  with  the  Company  if  each  of  the  entities  other  than  the  Company  beneficially  owns,  at  the  time  of  the 
determination, securities or interests representing more than fifty percent (50%) of the total combined voting power of all classes 
of securities or interests in one of the other entities in such chain.

2.33.“Performance Award” shall mean a cash bonus award, stock bonus award, performance award or incentive award 

that is paid in cash, Shares or a combination of both, awarded under Section 10.1 hereof.

2.34.“Performance-Based  Compensation”  shall  mean  any  compensation  that  is  intended  to  qualify  as  “performance-

based compensation” as described in Section 162(m)(4)(C) of the Code.

2.35.“Performance  Criteria”  shall  mean  the  criteria  (and  adjustments)  that  the  Committee  selects  for  an  Award  for 

purposes of establishing the Performance Goal or Performance Goals for a Performance Period, determined as follows:

(a)

The Performance Criteria that shall be used to establish Performance Goals are limited to the following:  
(i)  net  earnings  or  losses  (either  before  or  after  one  or  more  of  the  following:  (A)  interest,  (B)  taxes,  (C)  depreciation,  (D) 
amortization and (E) non-cash equity-based compensation expense); (ii) gross or net sales or revenue or sales or revenue growth; 
(iii) net income (either before or after taxes); (iv) adjusted net income; (v) operating income, earnings or profit (either before or 
after  taxes);  (vi)  cash  flow  (including,  but  not  limited  to,  cash  flow  return  on  investments,  operating  cash  flow  and  free  cash 
flow); (vii) return on assets; (viii) return on capital (or invested capital) and cost of capital; (ix) return on stockholders’ equity; (x) 
total stockholder return; (xi) return on sales; (xii) gross or net profit or operating margin; (xiii) costs, reductions in costs and cost 
control  measures;  (xiv)  funds  from  operations;  (xv)  expenses;  (xvi)  working  capital;  (xvii)  earnings  or  loss  per  Share;  (xviii) 
adjusted earnings or loss per share; (xix) price per Share or dividends per Share (or appreciation in and/or maintenance of such 
price  of  dividends);  (xx)  regulatory  achievements  or  compliance  (including,  without  limitation,  regulatory  body  approval  for 
commercialization of a product); (xxi) implementation or completion of critical projects; (xxii) market share; (xxiii) economic 
value; (xxiv) debt levels or reduction; (xxv) customer retention; (xxvi) sales-related goals; (xxvii) comparisons with other stock 
market  indices;  (xxviii)  operating  efficiency;  (xxix)  customer  satisfaction  and/or  growth;  (xxx)  employee  satisfaction;  (xxxi) 
research  and  development  achievements;  (xxxii)  financing  and  other  capital  raising  transactions;  (xxxiii)  recruiting  and 
maintaining personnel; and (xxxiv) year-end cash, any 

6

 
of which may be measured either in absolute terms for the Company or any department or operating unit of the Company or as 
compared to any incremental increase or decrease or as compared to results of a peer group or to market performance indicators 
or indices.

(b)

The  Administrator  may,  in  its  sole  discretion,  provide  that  one  or  more  objectively  determinable 
adjustments shall be made to one or more of the Performance Goals.  Such adjustments may include, but are not limited to, one or 
more  of  the  following:    (i)  items  related  to  a  change  in  accounting  principle;  (ii)  items  relating  to  financing  activities;  (iii) 
expenses for restructuring or productivity initiatives; (iv) other non-operating items; (v) items related to acquisitions; (vi) items 
attributable to the business operations of any entity acquired by the Company during the Performance Period; (vii) items related 
to the sale or disposition of a business or segment of a business; (viii) items related to discontinued operations that do not qualify 
as  a  segment  of  a  business  under  Applicable  Accounting  Standards;  (ix)  items  attributable  to  any  stock  dividend,  stock  split, 
combination or exchange of stock occurring during the Performance Period; (x) any other items of significant income or expense 
which are determined to be appropriate adjustments; (xi) items relating to unusual or extraordinary corporate transactions, events 
or developments, (xii)  items related to amortization of acquired intangible assets; (xiii) items that are outside the scope of the 
Company’s  core,  on-going  business  activities;  (xiv)  items  related  to  acquired  in-process  research  and  development;  (xv)  items 
relating to changes in tax laws; (xvi) items relating to major licensing or partnership arrangements; (xvii) items relating to asset 
impairment charges; (xviii) items relating to gains or losses for litigation, arbitration and contractual settlements; or (xix) items 
relating to any other unusual or nonrecurring events or changes in Applicable Laws, accounting principles or business conditions.  
For  all  Awards  intended  to  qualify  as  Performance-Based  Compensation,  such  determinations  shall  be  made  within  the  time 
prescribed by, and otherwise in compliance with, Section 162(m) of the Code.

2.36.“Performance Goals” shall mean, with respect to a Performance Period, one or more goals established in writing by 
the  Administrator  for  the  Performance  Period  based  upon  one  or  more  Performance  Criteria.    Depending  on  the  Performance 
Criteria  used  to  establish  such  Performance  Goals,  the  Performance  Goals  may  be  expressed  in  terms  of  overall  Company 
performance or the performance of an Affiliate, a division, business unit or one or more individuals.  The achievement of each 
Performance Goal shall be determined, to the extent applicable, with reference to Applicable Accounting Standards.

2.37.“Performance Period” shall mean one or more periods of time, which may be of varying and overlapping durations, 
as the Administrator may select, over which the attainment of one or more Performance Goals will be measured for the purpose 
of determining a Holder’s right to, and the payment of, a Performance Award.

2.38.“Performance  Stock  Unit”  shall  mean  a  Performance  Award  awarded  under  Section  10.1  hereof  which  is 

denominated in units of value including dollar value of shares of Common Stock.

2.39.“Permitted  Transferee”  shall  mean,  with  respect  to  a  Holder,  (a)  prior  to  the  Public  Trading  Date,  any  “family 
member” of the Holder, as defined under Rule 701 of the Securities Act and (b) on or after the Public Trading Date, any “family 
member” of the Holder, as defined under the General Instructions to Form S-8 Registration Statement under the Securities Act or 
any 

7

 
successor Form thereto, or any other transferee specifically approved by the Administrator, after taking into account Applicable 
Law.

2.40.“Plan” shall have the meaning set forth in Article 1 hereof.

2.41.“Program”  shall  mean  any  program  adopted  by  the  Administrator  pursuant  to  the  Plan  containing  the  terms  and 
conditions intended to govern a specified type of Award granted under the Plan and pursuant to which such type of Award may be 
granted under the Plan.

2.42.“Restricted Stock” shall mean an award of Shares made under Article 8 hereof that is subject to certain restrictions 

and may be subject to risk of forfeiture or repurchase.

2.43.“Restricted Stock Unit”  shall  mean  a  contractual  right  awarded  under  Article  9  hereof  to  receive  in  the  future  a 

Share or the Fair Market Value of a Share in cash.

2.44.“Securities Act” shall mean the Securities Act of 1933, as amended.

2.45.“Shares” shall mean shares of Common Stock.

2.46.“Share Limit” shall have the meaning set forth in Section 3.1(a) hereof.

2.47.“Stock Appreciation Right” shall mean a stock appreciation right granted under Article 11 hereof.

2.48.“Stock Appreciation Right Term” shall have the meaning set forth in Section 11.4 hereof.

2.49.“Stock Payment” shall mean (a) a payment in the form of Shares, or (b) an option or other right to purchase Shares, 

as part of a bonus, deferred compensation or other arrangement, awarded under Section 10.3 hereof.

2.50.“Subsidiary” shall mean any entity (other than the Company), whether domestic or foreign, in an unbroken chain of 
entities beginning with the Company if each of the entities other than the last entity in the unbroken chain beneficially owns, at 
the  time  of  the  determination,  securities  or  interests  representing  more  than  fifty  percent  (50%)  of  the  total  combined  voting 
power of all classes of securities or interests in one of the other entities in such chain.

2.51.“Termination of Service” shall mean the time when the employee-employer relationship between a Holder and the 
Company  or  any  Affiliate  is  terminated  for  any  reason,  including,  without  limitation,  a  termination  by  resignation,  discharge, 
death,  disability  or  retirement;  but  excluding  terminations  where  the  Holder  simultaneously  commences  or  remains  in 
employment or service with the Company or any Affiliate.

The Administrator, in its sole discretion, shall determine the effect of all matters and questions relating to Terminations 
of Service, including, without limitation, the question of whether a Termination of Service resulted from a discharge for cause 
and  all  questions  of  whether  particular  leaves  of  absence  constitute  a  Termination  of  Service.    For  purposes  of  the  Plan,  a 
Holder’s employee-employer relationship shall be deemed to be terminated in the event that the 

8

 
Affiliate employing such Holder ceases to remain an Affiliate following any merger, sale of stock or other corporate transaction 
or event (including, without limitation, a spin-off).

ARTICLE 3.

SHARES SUBJECT TO THE PLAN

3.1.Number of Shares.

transferred pursuant to Awards under the Plan shall be [__________] Shares.

(a)

Subject to Sections 14.1, 14.2 and 3.1(b) hereof, the aggregate number of Shares which may be issued or 

(b)

If any Shares subject to an Award are forfeited or expire or such Award is settled for cash (in whole or in
part), the Shares subject to such Award shall, to the extent of such forfeiture, expiration or cash settlement, again be available for 
future grants of Awards under the Plan and shall be added back to the Share Limit. In addition, (i) Shares tendered by a Holder or 
withheld  by  the  Company  in  payment  of  the  exercise  price  of  an  Option;  (ii)  Shares  tendered  by  a  Holder  or  withheld  by  the 
Company  to  satisfy  any  tax  withholding  obligation  with  respect  to  an  Award;  and  (iii)  Shares  subject  to  Stock  Appreciation 
Rights that are not issued in connection with the stock settlement of the Stock Appreciation Rights on exercise thereof shall be 
available for future grants of Awards under the Plan and shall be added back to the Share Limit. Notwithstanding anything to the 
contrary contained herein, Shares purchased on the open market with the cash proceeds from the exercise of Options shall not be 
added back to the Share Limit and shall not be available for future grants of Awards.  Any Shares repurchased by the Company 
under Section 8.4 hereof at the same price paid by the Holder or a lower price so that such Shares are returned to the Company 
will again be available for Awards.  The payment of Dividend Equivalents in cash in conjunction with any outstanding Awards 
shall not be counted against the Shares available for issuance under the Plan.  

3.2.Stock Distributed.  Any Shares distributed pursuant to an Award may consist, in whole or in part, of authorized and 

unissued Common Stock, treasury Common Stock or Common Stock purchased on the open market.

ARTICLE 4.

GRANTING OF AWARDS

4.1.Participation.  The Administrator may, from time to time, select from among all Eligible Individuals, those to whom 
an Award shall be granted and shall determine the nature and amount of each Award, which shall not be inconsistent with the 
requirements of the Plan.  

4.2.Award Agreement.  Each Award shall be evidenced by an Award Agreement that sets forth the terms, conditions and 
limitations  for  such  Award,  which  may  include  the  term  of  the  Award,  the  provisions  applicable  in  the  event  of  the  Holder’s 
Termination of Service, and the Company’s authority to unilaterally or bilaterally amend, modify, suspend, cancel or rescind an 
Award.  Award Agreements evidencing Awards intended to qualify as Performance-Based 

9

 
Compensation shall contain such terms and conditions as may be necessary to meet the applicable provisions of Section 162(m) 
of the Code.  

4.3.Limitations Applicable to Section 16 Persons.  Notwithstanding any other provision of the Plan, the Plan, and any 
Award  granted  or  awarded  to  any  individual  who  is  then  subject  to  Section  16  of  the  Exchange  Act,  shall  be  subject  to  any 
additional limitations set forth in any applicable exemptive rule under Section 16 of the Exchange Act (including Rule 16b-3 of 
the Exchange Act and any amendments thereto) that are requirements for the application of such exemptive rule.  To the extent 
permitted  by  Applicable  Law,  the  Plan  and  Awards  granted  or  awarded  hereunder  shall  be  deemed  amended  to  the  extent 
necessary to conform to such applicable exemptive rule.

4.4.At-Will  Service;  Voluntary  Participation.    Nothing  in  the  Plan  or  in  any  Program  or  Award  Agreement  hereunder 
shall  confer  upon  any  Holder  any  right  to  continue  in  the  employ  of  the  Company  or  any  Affiliate,  or  shall  interfere  with  or 
restrict  in  any  way  the  rights  of  the  Company  and  any  Affiliate,  which  rights  are  hereby  expressly  reserved,  to  discharge  any 
Holder at any time for any reason whatsoever, with or without cause, and with or without notice, or to terminate or change all 
other  terms  and  conditions  of  employment  or  engagement,  except  to  the  extent  expressly  provided  otherwise  in  a  written 
agreement between the Holder and the Company or any Affiliate.  Participation by each Holder in the Plan shall be voluntary and 
nothing in the Plan shall be construed as mandating that any Eligible Individual shall participate in the Plan.

4.5.Foreign Holders.    Notwithstanding  any  provision  of  the  Plan  to  the  contrary,  in  order  to  comply  with  the  laws  in 
countries other than the United States in which the Company and its Affiliates operate or have Employees, or in order to comply 
with  the  requirements  of  any  foreign  securities  exchange,  the  Administrator,  in  its  sole  discretion,  shall  have  the  power  and 
authority  to:  (a)  determine  which  Affiliates  shall  be  covered  by  the  Plan;  (b)  determine  which  Eligible  Individuals  outside  the 
United  States  are  eligible  to  participate  in  the  Plan;  (c)  modify  the  terms  and  conditions  of  any  Award  granted  to  Eligible 
Individuals outside the United States to comply with applicable foreign laws or listing requirements of any such foreign securities 
exchange; (d) establish subplans and modify exercise procedures and other terms and procedures, to the extent such actions may 
be  necessary  or  advisable  (any  such  subplans  and/or  modifications  shall  be  attached  to  the  Plan  as  appendices);  provided, 
however, that no such subplans and/or modifications shall increase the share limitations contained in Sections 3.1 and 3.3 hereof; 
and  (e)    take  any  action,  before  or  after  an  Award  is  made,  that  it  deems  advisable  to  obtain  approval  or  comply  with  any 
necessary local governmental regulatory exemptions or approvals or listing requirements of any such foreign securities exchange.  
Notwithstanding  the  foregoing,  the  Administrator  may  not  take  any  actions  hereunder,  and  no  Awards  shall  be  granted,  that 
would  violate  the  Code,  the  Exchange  Act,  the  Securities  Act,  any  other  securities  law  or  governing  statute,  the  rules  of  the 
securities exchange or automated quotation system on which the Shares are listed, quoted or traded or any other Applicable Law.  
For  purposes  of  the  Plan,  all  references  to  foreign  laws,  rules,  regulations  or  taxes  shall  be  references  to  the  laws,  rules, 
regulations and taxes of any applicable jurisdiction other than the United States or a political subdivision thereof.

10

 
ARTICLE 5.

PROVISIONS APPLICABLE TO AWARDS INTENDED TO QUALIFY AS PERFORMANCE-BASED 
COMPENSATION.

5.1.Purpose.    The  Committee,  in  its  sole  discretion,  may  determine  at  the  time  an  Award  is  granted  or  at  any  time 
thereafter whether any Award is intended to qualify as Performance-Based Compensation. If the Committee, in its sole discretion, 
decides to grant such an Award to an Eligible Individual that is intended to qualify as Performance-Based Compensation, then the 
provisions of this Article 5 shall control over any contrary provision contained in the Plan.  The Administrator may in its sole 
discretion grant Awards to other Eligible Individuals that are based on Performance Criteria or Performance Goals but that do not 
satisfy  the  requirements  of  this  Article  5  and  that  are  not  intended  to  qualify  as  Performance-Based  Compensation.    Unless 
otherwise  specified  by  the  Committee  at  the  time  of  grant,  the  Performance  Criteria  with  respect  to  an  Award  intended  to  be 
Performance-Based Compensation payable to a Covered Employee shall be determined on the basis of Applicable Accounting 
Standards.

5.2.Applicability.  The grant of an Award to an Eligible Individual for a particular Performance Period shall not require 
the grant of an Award to such Eligible Individual in any subsequent Performance Period and the grant of an Award to any one 
Eligible Individual shall not require the grant of an Award to any other Eligible Individual in such period or in any other period.

5.3.Types of Awards.  Notwithstanding anything in the Plan to the contrary, the Committee may grant any Award to an 
Eligible Individual intended to qualify as Performance-Based Compensation, including, without limitation, Restricted Stock the 
restrictions with respect to which lapse upon the attainment of specified Performance Goals, Restricted Stock Units that vest and 
become payable upon the attainment of specified Performance Goals and any Performance Awards described in Article 10 hereof 
that vest or become exercisable or payable upon the attainment of one or more specified Performance Goals.

5.4.Procedures with Respect to Performance-Based Awards.  To the extent necessary to comply with the requirements of 
Section 162(m)(4)(C) of the Code, with respect to any Award granted to one or more Eligible Individuals which is intended to 
qualify as Performance-Based Compensation, no later than ninety (90) days following the commencement of any Performance 
Period or any designated fiscal period or period of service (or such earlier time as may be required under Section 162(m) of the 
Code),  the  Committee  shall,  in  writing,  (a)  designate  one  or  more  Eligible  Individuals,  (b)  select  the  Performance  Criteria 
applicable to the Performance Period, (c) establish the Performance Goals, and amounts of such Awards, as applicable, which 
may  be  earned  for  such  Performance  Period  based  on  the  Performance  Goals,  and  (d)  specify  the  relationship  between  the 
Performance Criteria and the Performance Goals and the amounts of such Awards, as applicable, to be earned by each Covered 
Employee for such Performance Period.  Following the completion of each Performance Period, the Committee shall certify in 
writing whether and the extent to which the applicable Performance Goals have been achieved for such Performance Period.  In 
determining the amount earned under such Awards, unless otherwise provided in an applicable Program or Award Agreement, the 
Committee shall have the right to reduce or eliminate (but not to increase) the amount payable at a given level of performance to 
take into account 

11

 
additional factors that the Committee may deem relevant, including the assessment of individual or corporate performance for the 
Performance Period.

5.5.Payment of Performance-Based Awards.  Unless otherwise provided in the applicable Program or Award Agreement 
or  pursuant  to  Section  14.2  hereof  and  only  to  the  extent  otherwise  permitted  by  Section  162(m)(4)(C)  of  the  Code,  as  to  an 
Award  that  is  intended  to  qualify  as  Performance-Based  Compensation,  the  Holder  must  be  employed  by  the  Company  or  an
Affiliate  throughout  the  applicable  Performance  Period.    Unless  otherwise  provided  in  the  applicable  Performance  Goals, 
Program or Award Agreement, a Holder shall be eligible to receive payment pursuant to such Awards for a Performance Period 
only if and to the extent the Performance Goals for such applicable Performance Period are achieved.

5.6.Additional Limitations.  Notwithstanding any other provision of the Plan and except as otherwise determined by the 
Administrator,  any  Award  which  is  granted  to  an  Eligible  Individual  and  is  intended  to  qualify  as  Performance-Based 
Compensation shall be subject to any additional limitations set forth in Section 162(m) of the Code or any regulations or rulings 
issued thereunder that are requirements for qualification as Performance-Based Compensation, and the Plan, the Program and the 
Award Agreement shall be deemed amended to the extent necessary to conform to such requirements.

ARTICLE 6.

GRANTING OF OPTIONS

6.1.Granting of Options to Eligible Individuals.  The Administrator is authorized to grant Options to Eligible Individuals 
from time to time, in its sole discretion, on such terms and conditions as it may determine which shall not be inconsistent with the 
Plan.

6.2.Option Exercise Price.  Except as provided in Article 14 hereof, the exercise price per Share subject to each Option 
shall be set by the Administrator, but shall not be less than one hundred percent (100%) of the Fair Market Value of a Share on 
the date the Option is granted.  

6.3.Option Term.  The term of each Option (the “Option Term”) shall be set by the Administrator in its sole discretion; 
provided,  however,  that  the  Option  Term  shall  not  be  more  than  ten  (10)  years  from  the  date  the  Option  is  granted.    The 
Administrator shall determine the time period, including the time period following a Termination of Service, during which the 
Holder has the right to exercise the vested Options, which time period may not extend beyond the last day of the Option Term.  
Except as limited by the requirements of Section 409A or Section 422 of the Code and regulations and rulings thereunder, the 
Administrator may extend the Option Term of any outstanding Option, may extend the time period during which vested Options 
may be exercised following any Termination of Service of the Holder, and may amend any other term or condition of such Option 
relating to such a Termination of Service.

6.4.Option Vesting.

The period during which the right to exercise, in whole or in part, an Option vests in the Holder shall be 
set  by  the  Administrator  and  the  Administrator  may  determine  that  an  Option  may  not  be  exercised  in  whole  or  in  part  for  a
specified period after it is granted.  Such 

(a)

12

 
vesting may be based on service with the Company or any Affiliate, any of the Performance Criteria, or any other criteria selected 
by  the  Administrator.    At  any  time  after  the  grant  of  an  Option,  the  Administrator  may,  in  its  sole  discretion  and  subject  to 
whatever  terms  and  conditions  it  selects,  accelerate  the  vesting  of  the  Option,  including  following  a  Termination  of  Service; 
provided, that in no event shall an Option become exercisable following its expiration, termination or forfeiture.

(b) No  portion  of  an  Option  which  is  unexercisable  at  a  Holder’s  Termination  of  Service  shall  thereafter 
become exercisable, except as may be otherwise provided by the Administrator either in the Program, the Award Agreement or 
by action of the Administrator following the grant of the Option.

6.5.Substitution of Stock Appreciation Rights.  The Administrator may provide in the applicable Program or the Award 
Agreement  evidencing  the  grant  of  an  Option  that  the  Administrator,  in  its  sole  discretion,  shall  have  the  right  to  substitute  a 
Stock  Appreciation  Right  for  such  Option  at  any  time  prior  to  or  upon  exercise  of  such  Option;  provided  that  such  Stock 
Appreciation Right shall be exercisable with respect to the same number of Shares for which such substituted Option would have 
been  exercisable,  and  shall  also  have  the  same  exercise  price,  vesting  schedule  and  remaining  Option  Term  as  the  substituted 
Option.

ARTICLE 7.

EXERCISE OF OPTIONS

7.1.Partial Exercise.    An  exercisable  Option  may  be  exercised  in  whole  or  in  part.    However,  an  Option  shall  not  be 
exercisable with respect to fractional Shares and the Administrator may require that, by the terms of the Option, a partial exercise 
must be with respect to a minimum number of Shares.

7.2.Manner of Exercise.  All or a portion of an exercisable Option shall be deemed exercised upon delivery of all of the 
following to the Secretary of the Company, or such other person or entity designated by the Administrator, or his, her or its office, 
as applicable:

(a) A written or electronic notice complying with the applicable rules established by the Administrator stating 
that  the  Option,  or  a  portion  thereof,  is  exercised.    The  notice  shall  be  signed  by  the  Holder  or  other  person  then  entitled  to 
exercise the Option or such portion of the Option;

(b)

Such  representations  and  documents  as  the  Administrator,  in  its  sole  discretion,  deems  necessary  or 
advisable  to  effect  compliance  with  all  Applicable  Law.    The  Administrator  may,  in  its  sole  discretion,  also  take  whatever 
additional  actions  it  deems  appropriate  to  effect  such  compliance  including,  without  limitation,  placing  legends  on  share 
certificates and issuing stop-transfer notices to agents and registrars;

In the event that the Option shall be exercised pursuant to Section 12.3 hereof by any person or persons 
other than the Holder, appropriate proof of the right of such person or persons to exercise the Option, as determined in the sole 
discretion of the Administrator; and

(c)

13

 
Full  payment  of  the  exercise  price  and  applicable  withholding  taxes  to  the  stock  administrator  of  the 
Company for the shares with respect to which the Option, or portion thereof, is exercised, in a manner permitted by Section 12.1 
and 12.2 hereof.

(d)

ARTICLE 8.

AWARD OF RESTRICTED STOCK

8.1.Award of Restricted Stock.

(a)

The Administrator is authorized to grant Restricted Stock to Eligible Individuals, and shall determine the 
terms and conditions, including the restrictions applicable to each award of Restricted Stock, which terms and conditions shall 
not  be  inconsistent  with  the  Plan,  and  may  impose  such  conditions  on  the  issuance  of  such  Restricted  Stock  as  it  deems 
appropriate.

(b)

The  Administrator  shall  establish  the  purchase  price,  if  any,  and  form  of  payment  for  Restricted  Stock; 
provided, however, that if a purchase price is charged, such purchase price shall be no less than the par value, if any, of the Shares 
to  be  purchased,  unless  otherwise  permitted  by  Applicable  Law.    In  all  cases,  legal  consideration  shall  be  required  for  each 
issuance of Restricted Stock to the extent required by Applicable Law.

8.2.Rights  as  Stockholders.    Subject  to  Section  8.4  hereof,  upon  issuance  of  Restricted  Stock,  the  Holder  shall  have, 
unless  otherwise  provided  by  the  Administrator,  all  the  rights  of  a  stockholder  with  respect  to  said  Shares,  subject  to  the 
restrictions in the applicable Program or in each individual Award Agreement, including the right to receive all dividends and 
other distributions paid or made with respect to the Shares; provided, however, that, in the sole discretion of the Administrator, 
any extraordinary distributions with respect to the Shares shall be subject to the restrictions set forth in Section 8.3 hereof.  In 
addition, with respect to a share of Restricted Stock with performance-based vesting, dividends which are paid prior to vesting 
shall only be paid out to the Holder to the extent that performance-based vesting conditions are subsequently satisfied and the 
share of Restricted Stock vests.

8.3.Restrictions.  All shares of Restricted Stock (including any shares received by Holders thereof with respect to shares 
of  Restricted  Stock  as  a  result  of  stock  dividends,  stock  splits  or  any  other  form  of  recapitalization)  shall,  in  the  terms  of  the 
applicable  Program  or  in  each  individual  Award  Agreement,  be  subject  to  such  restrictions  and  vesting  requirements  as  the 
Administrator  shall  provide.    Such  restrictions  may  include,  without  limitation,  restrictions  concerning  voting  rights  and 
transferability and such restrictions may lapse separately or in combination at such times and pursuant to such circumstances or 
based on such criteria as selected by the Administrator, including, without limitation, criteria based on the Holder’s duration of 
employment with the Company, the Performance Criteria, Company or Affiliate performance, individual performance or other 
criteria selected by the Administrator.  By action taken after the Restricted Stock is issued, the Administrator may, on such terms 
and conditions as it may determine to be appropriate, accelerate the vesting of such Restricted Stock by removing any or all of 
the  restrictions  imposed  by  the  terms  of  the  Program  and/or  the  Award  Agreement.    Restricted  Stock  may  not  be  sold  or 
encumbered until all restrictions are terminated or expire.

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8.4.Repurchase or Forfeiture of Restricted Stock.  Except as otherwise determined by the Administrator at the time of the 
grant of the Award or thereafter, if no price was paid by the Holder for the Restricted Stock, upon a Termination of Service during 
the applicable restriction period, the Holder’s rights in unvested Restricted Stock then subject to restrictions shall lapse, and such 
Restricted Stock shall be surrendered to the Company and cancelled without consideration. If a price was paid by the Holder for 
the Restricted Stock, upon a Termination of Service during the applicable restriction period, the Company shall have the right to 
repurchase from the Holder the unvested Restricted Stock then subject to restrictions at a cash price per share equal to the price 
paid by the Holder for such Restricted Stock or such other amount as may be specified in the Program or the Award Agreement.  
Notwithstanding the foregoing, the Administrator in its sole discretion may provide that in the event of certain events, including a 
Change in Control, the Holder’s death, retirement or disability or any other specified Termination of Service or any other event,
the Holder’s rights in unvested Restricted Stock shall not lapse, such Restricted Stock shall vest and, if applicable, the Company 
shall not have a right of repurchase.

8.5.Certificates for Restricted Stock.  Restricted Stock granted pursuant to the Plan may be evidenced in such manner as 
the Administrator shall determine.  Certificates or book entries evidencing shares of Restricted Stock must include an appropriate 
legend  referring  to  the  terms,  conditions,  and  restrictions  applicable  to  such  Restricted  Stock.    The  Company  may,  in  its  sole 
discretion,  (a)  retain  physical  possession  of  any  stock  certificate  evidencing  shares  of  Restricted  Stock  until  the  restrictions 
thereon shall have lapsed and/or (b) require that the stock certificates evidencing shares of Restricted Stock be held in custody by 
a designated escrow agent (which may but need not be the Company) until the restrictions thereon shall have lapsed, and that the 
Holder deliver a stock power, endorsed in blank, relating to such Restricted Stock.

8.6.Section 83(b) Election.  If a Holder makes an election under Section 83(b) of the Code to be taxed with respect to the 
Restricted Stock as of the date of transfer of the Restricted Stock rather than as of the date or dates upon which the Holder would 
otherwise  be  taxable  under  Section  83(a)  of  the  Code,  the  Holder  shall  be  required  to  deliver  a  copy  of  such  election  to  the 
Company promptly after filing such election with the Internal Revenue Service.

ARTICLE 9.

AWARD OF RESTRICTED STOCK UNITS

9.1.Grant of Restricted Stock Units.  The Administrator is authorized to grant Awards of Restricted Stock Units to any 
Eligible Individual selected by the Administrator in such amounts and subject to such terms and conditions as determined by the 
Administrator.

9.2.Term.    Except  as  otherwise  provided  herein,  the  term  of  a  Restricted  Stock  Unit  award  shall  be  set  by  the 

Administrator in its sole discretion.

9.3.Purchase Price.  The Administrator shall specify the purchase price, if any, to be paid by the Holder to the Company 
with respect to any Restricted Stock Unit award; provided, however, that value of the consideration shall not be less than the par 
value of a Share, unless otherwise permitted by Applicable Law.

15

 
9.4.Vesting of Restricted Stock Units.  At the time of grant, the Administrator shall specify the date or dates on which the 
Restricted  Stock  Units  shall  become  fully  vested  and  nonforfeitable,  and  may  specify  such  conditions  to  vesting  as  it  deems 
appropriate, including, without limitation, vesting based upon the Holder’s duration of service to the Company or any Affiliate, 
one  or  more  Performance  Criteria,  Company  performance,  individual  performance  or  other  specific  criteria,  in  each  case  on  a 
specified date or dates or over any period or periods, as determined by the Administrator.

9.5.Maturity and Payment.    At  the  time  of  grant,  the  Administrator  shall  specify  the  maturity  date  applicable  to  each 
grant of Restricted Stock Units which shall be no earlier than the vesting date or dates of the Award and may be determined at the 
election of the Holder (if permitted by the applicable Award Agreement); provided that, except as otherwise determined by the 
Administrator, set forth in any applicable Award Agreement, and subject to compliance with Section 409A of the Code, in no 
event shall the maturity date relating to each Restricted Stock Unit occur following the later of (a) the fifteenth (15th) day of the 
third (3rd) month following the end of calendar year in which the Restricted Stock Unit vests; or (b) the fifteenth (15th) day of 
the third (3rd) month following the end of the Company’s fiscal year in which the Restricted Stock Unit vests.  On the maturity 
date, the Company shall, subject to Section 12.4(e) hereof, transfer to the Holder one unrestricted, fully transferable Share for 
each Restricted Stock Unit scheduled to be paid out on such date and not previously forfeited, or, in the sole discretion of the 
Administrator, an amount in cash equal to the Fair Market Value of such shares on the maturity date or a combination of cash and 
Common Stock as determined by the Administrator.

9.6.Payment upon Termination of Service.  An Award of Restricted Stock Units shall only be payable while the Holder is 
an Employee; provided, however, that the Administrator, in its sole and absolute discretion may provide (in an Award Agreement 
or otherwise) that a Restricted Stock Unit award may be paid subsequent to a Termination of Service in certain events, including 
a Change in Control, the Holder’s death, retirement or disability or any other specified Termination of Service.

9.7.No Rights as a Stockholder.  Unless otherwise determined by the Administrator,  a Holder who is awarded Restricted 
Stock Units shall possess no incidents of ownership with respect to the Shares represented by such Restricted Stock Units, unless 
and until the same are transferred to the Holder pursuant to the terms of this Plan and the Award Agreement.

9.8.Dividend  Equivalents.    Subject  to  Section  10.2  hereof,  the  Administrator  may,  in  its  sole  discretion,  provide  that 
Dividend Equivalents shall be earned by a Holder of Restricted Stock Units based on dividends declared on the Common Stock, 
to be credited as of dividend payment dates during the period between the date an Award of Restricted Stock Units is granted to a 
Holder and the maturity date of such Award.

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ARTICLE 10.

AWARD OF PERFORMANCE AWARDS, DIVIDEND EQUIVALENTS, STOCK PAYMENTS, DEFERRED STOCK, 
DEFERRED STOCK UNITS

10.1.Performance Awards.

(a)

The  Administrator  is  authorized  to  grant  Performance  Awards,  including  Awards  of  Performance  Stock 
Units, to any Eligible Individual and to determine whether such Performance Awards shall be Performance-Based Compensation.  
The value of Performance Awards, including Performance Stock Units, may be linked to any one or more of the Performance 
Criteria or other specific criteria determined by the Administrator, in each case on a specified date or dates or over any period or 
periods determined by the Administrator.  Performance Awards, including Performance Stock Unit awards may be paid in cash, 
Shares, or a combination of cash and Shares, as determined by the Administrator.

(b) Without limiting Section 10.1(a) hereof, the Administrator may grant Performance Awards to any Eligible 
Individual  in  the  form  of  a  cash  bonus  payable  upon  the  attainment  of  objective  Performance  Goals,  or  such  other  criteria, 
whether or not objective, which are established by the Administrator, in each case on a specified date or dates or over any period 
or periods determined by the Administrator.  Any such bonuses paid to a Holder which are intended to be Performance-Based 
Compensation  shall  be  based  upon  objectively  determinable  bonus  formulas  established  in  accordance  with  the  provisions  of 
Article 5 hereof.

10.2.Dividend Equivalents.

(a) Dividend Equivalents may be granted by the Administrator based on dividends declared on the Common 
Stock, to be credited as of dividend payment dates during the period between the date an Award is granted to a Holder and the 
date such Award vests, is exercised, is distributed or expires, as determined by the Administrator.  Such Dividend Equivalents 
shall be converted to cash or additional shares of Common Stock by such formula and at such time and subject to such limitations 
as may be determined by the Administrator.

Stock Appreciation Rights.

(b) Notwithstanding  the  foregoing,  no  Dividend  Equivalents  shall  be  payable  with  respect  to  Options  or 

10.3.Stock Payments.  The Administrator is authorized to make Stock Payments to any Eligible Individual.  The number 
or  value  of  Shares  of  any  Stock  Payment  shall  be  determined  by  the  Administrator  and  may  be  based  upon  one  or  more 
Performance  Criteria  or  any  other  specific  criteria,  including  service  to  the  Company  or  any  Affiliate,  determined  by  the 
Administrator.  Shares underlying a Stock Payment which is subject to a vesting schedule or other conditions or criteria set by the 
Administrator will not be issued until those conditions have been satisfied.  Unless otherwise provided by the Administrator, a 
Holder of a Stock Payment shall have no rights as a Company stockholder with respect to such Stock Payment until such time as 
the Stock Payment has vested and the Shares underlying the Award have been issued to the Holder.  Stock Payments may, but are 
not  required  to,  be  made  in  lieu  of  base  salary,  bonus,  fees  or  other  cash  compensation  otherwise  payable  to  such  Eligible 
Individual.

17

 
10.4.Deferred Stock.  The Administrator is authorized to grant Deferred Stock to any Eligible Individual.  The number of 
shares  of  Deferred  Stock  shall  be  determined  by  the  Administrator  and  may  (but  is  not  required  to)  be  based  on  one  or  more 
Performance  Criteria  or  other  specific  criteria,  including  service  to  the  Company  or  any  Affiliate,  as  the  Administrator 
determines,  in  each  case  on  a  specified  date  or  dates  or  over  any  period  or  periods  determined  by  the  Administrator.    Shares 
underlying a Deferred Stock award which is subject to a vesting schedule or other conditions or criteria set by the Administrator 
will  be  issued  on  the  vesting  date(s)  or  date(s)  that  those  conditions  and  criteria  have  been  satisfied,  as  applicable.    Unless 
otherwise provided by the Administrator, a Holder of Deferred Stock shall have no rights as a Company stockholder with respect 
to  such  Deferred  Stock  until  such  time  as  the  Award  has  vested  and  any  other  applicable  conditions  and/or  criteria  have  been 
satisfied and the Shares underlying the Award have been issued to the Holder.

10.5.Deferred Stock Units.    The  Administrator  is  authorized  to  grant  Deferred  Stock  Units  to  any  Eligible  Individual.  
The number of Deferred Stock Units shall be determined by the Administrator and may (but is not required to) be based on one 
or more Performance Criteria or other specific criteria, including service to the Company or any Affiliate, as the Administrator 
determines,  in  each  case  on  a  specified  date  or  dates  or  over  any  period  or  periods  determined  by  the  Administrator.    Each 
Deferred Stock Unit shall entitle the Holder thereof to receive one share of Common Stock on the date the Deferred Stock Unit 
becomes vested or upon a specified settlement date thereafter (which settlement date may (but is not required to) be the date of 
the Holder’s Termination of Service).  Shares underlying a Deferred Stock Unit award which is subject to a vesting schedule or 
other conditions or criteria set by the Administrator will not be issued until on or following the date that those conditions and 
criteria  have  been  satisfied.    Unless  otherwise  provided  by  the  Administrator,  a  Holder  of  Deferred  Stock  Units  shall  have  no 
rights as a Company stockholder with respect to such Deferred Stock Units until such time as the Award has vested and any other 
applicable conditions and/or criteria have been satisfied and the Shares underlying the Award have been issued to the Holder.

10.6.Term.  The term of a Performance Award, Dividend Equivalent award, Stock Payment award, Deferred Stock award 

and/or Deferred Stock Unit award shall be set by the Administrator in its sole discretion.

10.7.Purchase Price.  The Administrator may establish the purchase price of a Performance Award, Shares distributed as 
a  Stock  Payment  award,  shares  of  Deferred  Stock  or  Shares  distributed  pursuant  to  a  Deferred  Stock  Unit  award;  provided, 
however, that value of the consideration shall not be less than the par value of a Share, unless otherwise permitted by Applicable 
Law.

10.8.Termination of Service.  A Performance Award, Stock Payment award, Dividend Equivalent award, Deferred Stock 
award and/or Deferred Stock Unit award is distributable only while the Holder is an Employee.  The Administrator, however, in 
its sole discretion may provide that the Performance Award, Dividend Equivalent award, Stock Payment award, Deferred Stock 
award and/or Deferred Stock Unit award may be distributed subsequent to a Termination of Service in certain events, including a 
Change in Control, the Holder’s death, retirement or disability or any other specified Termination of Service.

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ARTICLE 11.

AWARD OF STOCK APPRECIATION RIGHTS

11.1.Grant of Stock Appreciation Rights.

time, in its sole discretion, on such terms and conditions as it may determine consistent with the Plan.

(a)

The Administrator is authorized to grant Stock Appreciation Rights to Eligible Individuals from time to 

(b) A  Stock  Appreciation  Right  shall  entitle  the  Holder  (or  other  person  entitled  to  exercise  the  Stock 
Appreciation Right pursuant to the Plan) to exercise all or a specified portion of the Stock Appreciation Right (to the extent then 
exercisable pursuant to its terms) and to receive from the Company an amount determined by multiplying the difference obtained
by subtracting the exercise price per Share of the Stock Appreciation Right from the Fair Market Value on the date of exercise of 
the  Stock  Appreciation  Right  by  the  number  of  Shares  with  respect  to  which  the  Stock  Appreciation  Right  shall  have  been 
exercised, subject to any limitations the Administrator may impose.  Except as described in (c) below or in Section 14.2 hereof, 
the exercise price per Share subject to each Stock Appreciation Right shall be set by the Administrator, but shall not be less than 
one hundred percent (100%) of the Fair Market Value on the date the Stock Appreciation Right is granted.

(c) Notwithstanding the foregoing provisions of Section 11.1(b) hereof to the contrary, in the case of a Stock 
Appreciation Right that is a Substitute Award, the price per Share of the Shares subject to such Stock Appreciation Right may be 
less than one hundred percent (100%) of the Fair Market Value per share on the date of grant; provided that the excess of:  (i) the 
aggregate Fair Market Value (as of the date such Substitute Award is granted) of the shares subject to the Substitute Award, over 
(ii)  the  aggregate  exercise  price  thereof  does  not  exceed  the  excess  of:    (x)  the  aggregate  fair  market  value  (as  of  the  time 
immediately  preceding  the  transaction  giving  rise  to  the  Substitute  Award,  such  fair  market  value  to  be  determined  by  the 
Administrator) of the shares of the predecessor entity that were subject to the grant assumed or substituted for by the Company, 
over (y) the aggregate exercise price of such shares.

11.2.Stock Appreciation Right Vesting.

(a)

The period during which the right to exercise, in whole or in part, a Stock Appreciation Right vests in the 
Holder  shall  be  set  by  the  Administrator  and  the  Administrator  may  determine  that  a  Stock  Appreciation  Right  may  not  be 
exercised in whole or in part for a specified period after it is granted.  Such vesting may be based on service with the Company or 
any Affiliate, any of the Performance Criteria or any other criteria selected by the Administrator.  At any time after grant of a 
Stock Appreciation Right, the Administrator may, in its sole discretion and subject to whatever terms and conditions it selects, 
accelerate the period during which a Stock Appreciation Right vests.

(b) No  portion  of  a  Stock  Appreciation  Right  which  is  unexercisable  at  Termination  of  Service  shall 
thereafter  become  exercisable,  except  as  may  be  otherwise  provided  by  the  Administrator  either  in  the  applicable  Program  or 
Award Agreement or by action of the 

19

 
Administrator following the grant of the Stock Appreciation Right, including following a Termination of Service; provided, that 
in no event shall a Stock Appreciation Right become exercisable following its expiration, termination or forfeiture.

11.3.Manner of Exercise.  All or a portion of an exercisable Stock Appreciation Right shall be deemed exercised upon 
delivery  of  all  of  the  following  to  the  stock  administrator  of  the  Company,  or  such  other  person  or  entity  designated  by  the 
Administrator, or his, her or its office, as applicable:

(a) A written or electronic notice complying with the applicable rules established by the Administrator stating 
that the Stock Appreciation Right, or a portion thereof, is exercised.  The notice shall be signed by the Holder or other person
then entitled to exercise the Stock Appreciation Right or such portion of the Stock Appreciation Right;

(b)

Such  representations  and  documents  as  the  Administrator,  in  its  sole  discretion,  deems  necessary  or 
advisable to effect compliance with all applicable provisions of the Securities Act and any other federal, state or foreign securities 
laws or regulations.  The Administrator may, in its sole discretion, also take whatever additional actions it deems appropriate to 
effect such compliance; and

In the event that the Stock Appreciation Right shall be exercised pursuant to this Section 11.3 hereof by 
any  person  or  persons  other  than  the  Holder,  appropriate  proof  of  the  right  of  such  person  or  persons  to  exercise  the  Stock 
Appreciation Right.

(c)

11.4.Stock Appreciation Right Term.  The term of each Stock Appreciation Right (the “Stock Appreciation Right Term”) 
shall be set by the Administrator in its sole discretion; provided, however, that the term shall not be more than ten (10) years from 
the date the Stock Appreciation Right is granted.  The Administrator shall determine the time period, including the time period 
following  a  Termination  of  Service,  during  which  the  Holder  has  the  right  to  exercise  the  vested  Stock  Appreciation  Rights, 
which time period may not extend beyond the expiration date of the Stock Appreciation Right Term.  Except as limited by the 
requirements of Section 409A of the Code and regulations and rulings thereunder or the first sentence of this Section 11.4, the 
Administrator may extend the Stock Appreciation Right Term of any outstanding Stock Appreciation Right, may extend the time 
period during which vested Stock Appreciation Rights may be exercised following any Termination of Service of the Holder, and 
may amend any other term or condition of such Stock Appreciation Right relating to such a Termination of Service.

11.5.Payment.  Payment of the amounts payable with respect to Stock Appreciation Rights pursuant to this Article 11 
shall  be  in  cash,  Shares  (based  on  its  Fair  Market  Value  as  of  the  date  the  Stock  Appreciation  Right  is  exercised),  or  a 
combination of both, as determined by the Administrator.

ARTICLE 12.

ADDITIONAL TERMS OF AWARDS

12.1.Payment.  The Administrator shall determine the methods by which payments by any Holder with respect to any 

Awards granted under the Plan shall be made, including, without 

20

 
limitation:  (a)  cash  or  check,  (b)  Shares  (including,  in  the  case  of  payment  of  the  exercise  price  of  an  Award,  Shares  issuable 
pursuant to the exercise of the Award) or Shares held for such period of time as may be required by the Administrator in order to 
avoid adverse accounting consequences, in each case, having a Fair Market Value on the date of delivery equal to the aggregate 
payments required, (c) delivery of a written or electronic notice that the Holder has placed a market sell order with a broker with 
respect to Shares then issuable upon exercise or vesting of an Award, and that the broker has been directed to pay a sufficient 
portion of the net proceeds of the sale to the Company in satisfaction of the aggregate payments required; provided that payment 
of such proceeds is then made to the Company upon settlement of such sale, or (d) other form of legal consideration acceptable to 
the  Administrator.    The  Administrator  shall  also  determine  the  methods  by  which  Shares  shall  be  delivered  or  deemed  to  be 
delivered  to  Holders.    Notwithstanding  any  other  provision  of  the  Plan  to  the  contrary,  no  Holder  who  is  a  Director  or  an 
“executive  officer”  of  the  Company  within  the  meaning  of  Section  13(k)  of  the  Exchange  Act  shall  be  permitted  to  make 
payment with respect to any Awards granted under the Plan, or continue any extension of credit with respect to such payment, 
with a loan from the Company or a loan arranged by the Company in violation of Section 13(k) of the Exchange Act.

12.2.Tax Withholding.  The Company or any Affiliate shall have the authority and the right to deduct or withhold, or 
require  a  Holder  to  remit  to  the  Company,  an  amount  sufficient  to  satisfy  federal,  state,  local  and  foreign  taxes  (including  the 
Holder’s  FICA  or  employment  tax  obligation)  required  by  law  to  be  withheld  with  respect  to  any  taxable  event  concerning  a 
Holder  arising  as  a  result  of  the  Plan.    The  Administrator  may  in  its  sole  discretion  and  in  satisfaction  of  the  foregoing 
requirement allow a Holder to satisfy such obligations by any payment means described in Section 12.1 hereof, including without 
limitation, by allowing such Holder to elect to have the Company withhold Shares otherwise issuable under an Award (or allow 
the surrender of Shares). The number of Shares which may be so withheld or surrendered shall be limited to the number of Shares 
which have a Fair Market Value on the date of withholding or repurchase equal to the aggregate amount of such liabilities based 
on  the  minimum  statutory  withholding  rates  for  federal,  state,  local  and  foreign  income  tax  and  payroll  tax  purposes  that  are 
applicable  to  such  supplemental  taxable  income.    The  Administrator  shall  determine  the  fair  market  value  of  the  Shares, 
consistent  with  applicable  provisions  of  the  Code,  for  tax  withholding  obligations  due  in  connection  with  a  broker-assisted 
cashless Option or Stock Appreciation Right exercise involving the sale of Shares to pay the Option or Stock Appreciation Right 
exercise price or any tax withholding obligation.

12.3.Transferability of Awards.

(a)

Except as otherwise provided in Sections 12.3(b) and 12.3(c) hereof:

(i) No Award under the Plan may be sold, pledged, assigned or transferred in any manner other than by 
will or the laws of descent and distribution or, subject to the consent of the Administrator, pursuant to a DRO, unless and until 
such Award has been exercised, or the Shares underlying such Award have been issued, and all restrictions applicable to such 
Shares have lapsed;

Holder or the Holder’s successors in interest or shall be subject to 

(ii) No Award or interest or right therein shall be liable for the debts, contracts or engagements of the 

21

 
disposition  by  transfer,  alienation,  anticipation,  pledge,  hypothecation,  encumbrance,  assignment  or  any  other  means  whether 
such disposition be voluntary or involuntary or by operation of law by judgment, levy, attachment, garnishment or any other legal 
or equitable proceedings (including bankruptcy) unless and until such Award has been exercised, or the Shares underlying such 
Award have been issued, and all restrictions applicable to such Shares have lapsed, and any attempted disposition of an Award 
prior to the satisfaction of these conditions shall be null and void and of no effect, except to the extent that such disposition is 
permitted by clause (i) of this provision; and

(iii)During the lifetime of the Holder, only the Holder may exercise an Award (or any portion thereof) 
granted  to  such  Holder  under  the  Plan,  unless  it  has  been  disposed  of  pursuant  to  a  DRO;  after  the  death  of  the  Holder,  any 
exercisable portion of an Award may, prior to the time when such portion becomes unexercisable under the Plan or the applicable 
Program or Award Agreement, be exercised by the Holder’s personal representative or by any person empowered to do so under 
the deceased Holder’s will or under the then applicable laws of descent and distribution.

(b) Notwithstanding Section 12.3(a) hereof, the Administrator, in its sole discretion, may determine to permit 
a Holder or a Permitted Transferee of such Holder to transfer an Award to any one or more Permitted Transferees, subject to the 
following terms and conditions:  (i) an Award transferred to a Permitted Transferee shall not be assignable or transferable by the 
Permitted  Transferee  (other  than  to  another  Permitted  Transferee  of  the  applicable  Holder)  other  than  by  will  or  the  laws  of 
descent  and  distribution;  (ii)  an  Award  transferred  to  a  Permitted  Transferee  shall  continue  to  be  subject  to  all  the  terms  and 
conditions of the Award as applicable to the original Holder (other than the ability to further transfer the Award); and (iii) the 
Holder (or transferring Permitted Transferee) and the Permitted Transferee shall execute any and all documents requested by the 
Administrator, including, without limitation documents to (A) confirm the status of the transferee as a Permitted Transferee, (B) 
satisfy  any  requirements  for  an  exemption  for  the  transfer  under  applicable  federal,  state  and  foreign  securities  laws  and  (C) 
evidence the transfer.

(c) Notwithstanding  Section  12.3(a)  hereof,  a  Holder  may,  in  the  manner  determined  by  the  Administrator, 
designate a beneficiary to exercise the rights of the Holder and to receive any distribution with respect to any Award upon the 
Holder’s death.  A beneficiary, legal guardian, legal representative, or other person claiming any rights pursuant to the Plan is 
subject  to  all  terms  and  conditions  of  the  Plan  and  any  Program  or  Award  Agreement  applicable  to  the  Holder,  except  to  the 
extent the Plan, the Program and the Award Agreement otherwise provide, and to any additional restrictions deemed necessary or 
appropriate  by  the  Administrator.    If  the  Holder  is  married  or  a  domestic  partner  in  a  domestic  partnership  qualified  under 
Applicable Law and resides in a community property state, a designation of a person other than the Holder’s spouse or domestic 
partner, as applicable, as his or her beneficiary with respect to more than fifty percent (50%) of the Holder’s interest in the Award 
shall not be effective without the prior written or electronic consent of the Holder’s spouse or domestic partner, as applicable.  If 
no beneficiary has been designated or survives the Holder, payment shall be made to the person entitled thereto pursuant to the 
Holder’s  will  or  the  laws  of  descent  and  distribution.    Subject  to  the  foregoing,  a  beneficiary  designation  may  be  changed  or 
revoked  by  a  Holder  at  any  time;  provided  that  the  change  or  revocation  is  filed  with  the  Administrator  prior  to  the  Holder’s 
death.

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12.4.Conditions to Issuance of Shares.

(a) Notwithstanding anything herein to the contrary, the Company shall not be required to issue or deliver any 
certificates or make any book entries evidencing Shares pursuant to the exercise of any Award, unless and until the Board or the 
Committee has determined, with advice of counsel, that the issuance of such shares is in compliance with all Applicable Law, and 
the Shares are covered by an effective registration statement or applicable exemption from registration.  In addition to the terms 
and  conditions  provided  herein,  the  Board  or  the  Committee  may  require  that  a  Holder  make  such  reasonable  covenants, 
agreements,  and  representations  as  the  Board  or  the  Committee,  in  its  discretion,  deems  advisable  in  order  to  comply  with 
Applicable Law.

(b) All  Share  certificates  delivered  pursuant  to  the  Plan  and  all  Shares  issued  pursuant  to  book  entry 
procedures  are  subject  to  any  stop-transfer  orders  and  other  restrictions  as  the  Administrator  deems  necessary  or  advisable  to 
comply  with  Applicable  Law.    The  Administrator  may  place  legends  on  any  Share  certificate  or  book  entry  to  reference 
restrictions applicable to the Shares.

The  Administrator  shall  have  the  right  to  require  any  Holder  to  comply  with  any  timing  or  other 
restrictions with respect to the settlement, distribution or exercise of any Award, including a window-period limitation, as may be 
imposed in the sole discretion of the Administrator.

(c)

cash shall be given in lieu of fractional Shares or whether such fractional Shares shall be eliminated by rounding down.

(d) No fractional Shares shall be issued and the Administrator shall determine, in its sole discretion, whether 

(e) Notwithstanding  any  other  provision  of  the  Plan,  unless  otherwise  determined  by  the  Administrator  or 
required by any Applicable Law, the Company shall not deliver to any Holder certificates evidencing Shares issued in connection 
with any Award and instead such Shares shall be recorded in the books of the Company (or, as applicable, its transfer agent or 
stock plan administrator).

12.5.Forfeiture  and  Claw-Back  Provisions.    Pursuant  to  its  general  authority  to  determine  the  terms  and  conditions 
applicable to Awards under the Plan, the Administrator shall have the right to provide, in an Award Agreement or otherwise, or to 
require a Holder to agree by separate written or electronic instrument, that:

(a)

(i) Any proceeds, gains or other economic benefit actually or constructively received by the Holder upon 
any  receipt  or  exercise  of  the  Award,  or  upon  the  receipt  or  resale  of  any  Shares  underlying  the  Award,  must  be  paid  to  the 
Company, and (ii) the Award shall terminate and any unexercised portion of the Award (whether or not vested) shall be forfeited, 
if (x) a Termination of Service occurs prior to a specified date, or within a specified time period following receipt or exercise of 
the  Award,  or  (y)  the  Holder  at  any  time,  or  during  a  specified  time  period,  engages  in  any  activity  in  competition  with  the 
Company, or which is inimical, contrary or harmful to the interests of the Company, as further defined by the Administrator or (z) 
the Holder incurs a Termination of Service for “cause” (as such term is defined in the sole discretion of the 

23

 
Administrator, or as set forth in a written agreement relating to such Award between the Company and the Holder); and

(b) All Awards (including any proceeds, gains or other economic benefit actually or constructively received 
by the Holder upon any receipt or exercise of any Award or upon the receipt or resale of any Shares underlying the Award) shall 
be subject to the provisions of any claw-back policy implemented by the Company, including, without limitation, any claw-back 
policy  adopted  to  comply  with  the  requirements  of  Applicable  Law,  including,  without  limitation,  the  Dodd-Frank  Wall  Street 
Reform and Consumer Protection Act and any rules or regulations promulgated thereunder, to the extent set forth in such claw-
back policy and/or in the applicable Award Agreement.

12.6.Repricing.  The Administrator shall, without the approval of the stockholders of the Company, have the authority to 
(i) amend any outstanding Option or Stock Appreciation Right to reduce its price per Share, or (ii) cancel any Option or Stock 
Appreciation Right in exchange for cash or another Award when the Option or Stock Appreciation Right price per Share exceeds 
the Fair Market Value of the underlying Shares, in its sole discretion.

12.7.Leave  of  Absence.    Unless  the  Administrator  provides  otherwise,  vesting  of  Awards  granted  hereunder  shall  be 
suspended during any unpaid leave of absence.  A Holder shall not cease to be considered an Employee in the case of any (a) 
leave of absence approved by the Company, (b) transfer between locations of the Company or between the Company and any of 
its  Affiliates  or  any  successor  thereof,  or  (c)  change  in  status,  provided  that  such  change  does  not  affect  the  specific  terms 
applying to the Holder’s Award.

ARTICLE 13.

ADMINISTRATION

13.1.Administrator.  The Committee shall administer the Plan. 

13.2.Duties and Powers of Administrator.  It shall be the duty of the Administrator to conduct the general administration 
of the Plan in accordance with its provisions.  The Administrator shall have the power to interpret the Plan, the Program and the 
Award Agreement, and to adopt such rules for the administration, interpretation and application of the Plan as are not inconsistent 
therewith, to interpret, amend or revoke any such rules and to amend any Program or Award Agreement; provided that the rights 
or obligations of the Holder of the Award that is the subject of any such Program or Award Agreement are not affected materially 
and adversely by such amendment, unless the consent of the Holder is obtained or such amendment is otherwise permitted under 
Section  14.10  hereof.    Any  such  grant  or  award  under  the  Plan  need  not  be  the  same  with  respect  to  each  Holder.    In  its  sole 
discretion, the Board may at any time and from time to time exercise any and all rights and duties of the Committee under the 
Plan except with respect to matters which under Rule 16b-3 under the Exchange Act or any successor rule, or Section 162(m) of 
the Code, or any regulations or rules issued thereunder, or the rules of any securities exchange or automated quotation system on 
which  the  Shares  are  listed,  quoted  or  traded  are  required  to  be  determined  in  the  sole  discretion  of  the  Committee. 
Notwithstanding the foregoing, any grants of Awards under the Plan made by the Board must be approved by the majority of the 

24

 
Company’s independent directors (as defined in Rule 5605(a)(2) of the Nasdaq Listing Rules) in order to comply with Nasdaq 
Listing Rule 5635(c).

13.3.Action by the Committee.  Unless otherwise established by the Board or in any charter of the Committee, a majority 
of the Committee shall constitute a quorum and the acts of a majority of the members present at any meeting at which a quorum 
is present, and acts approved in writing by all members of the Committee in lieu of a meeting, shall be deemed the acts of the 
Committee.    Each  member  of  the  Committee  is  entitled  to,  in  good  faith,  rely  or  act  upon  any  report  or  other  information 
furnished to that member by any officer or other employee of the Company or any Affiliate, the Company’s independent certified 
public  accountants,  or  any  executive  compensation  consultant  or  other  professional  retained  by  the  Company  to  assist  in  the 
administration of the Plan.

13.4.Authority  of  Administrator.    Subject  to  the  Company’s  Bylaws,  the  Committee’s  Charter  and  any  specific 

designation in the Plan, the Administrator has the exclusive power, authority and sole discretion to:

(a) Designate Eligible Individuals to receive Awards;

(b) Determine the type or types of Awards to be granted to each Eligible Individual;

(c) Determine the number of Awards to be granted and the number of Shares to which an Award will relate;

(d) Determine the terms and conditions of any Award granted pursuant to the Plan, including, but not limited 
to, the exercise price, grant price, or purchase price, any performance criteria, any restrictions or limitations on the Award, any 
schedule for vesting, lapse of forfeiture restrictions or restrictions on the exercisability of an Award, and accelerations or waivers 
thereof,  and  any  provisions  related  to  non-competition  and  recapture  of  gain  on  an  Award,  based  in  each  case  on  such 
considerations as the Administrator in its sole discretion determines;

(e) Determine whether, to what extent, and pursuant to what circumstances an Award may be settled in, or the 
exercise price of an Award may be paid in cash, Shares, other Awards, or other property, or an Award may be canceled, forfeited, 
or surrendered;

(f)

Prescribe the form of each Award Agreement, which need not be identical for each Holder;

(g) Decide all other matters that must be determined in connection with an Award;

(h)

Establish, adopt, or revise any rules and regulations as it may deem necessary or advisable to administer 

the Plan;

Agreement;

(i)

Interpret  the  terms  of,  and  any  matter  arising  pursuant  to,  the  Plan,  any  Program  or  any  Award 

25

 
Administrator deems necessary or advisable to administer the Plan; and

(j) Make  all  other  decisions  and  determinations  that  may  be  required  pursuant  to  the  Plan  or  as  the 

time after the grant of an Award, subject to whatever terms and conditions it selects and Sections 3.4 and 14.2(d) hereof.

(k) Accelerate wholly or partially the vesting or lapse of restrictions of any Award or portion thereof at any 

13.5.Decisions Binding.  The Administrator’s interpretation of the Plan, any Awards granted pursuant to the Plan, any 
Program,  any  Award  Agreement  and  all  decisions  and  determinations  by  the  Administrator  with  respect  to  the  Plan  are  final, 
binding, and conclusive on all parties.

ARTICLE 14.

MISCELLANEOUS PROVISIONS

14.1.Amendment, Suspension or Termination of the Plan.  Except as otherwise provided in this Section 14.1, the Plan 
may  be  wholly  or  partially  amended  or  otherwise  modified,  suspended  or  terminated  at  any  time  or  from  time  to  time  by  the 
Board or the Committee. Except as provided in Section 14.10 hereof, no amendment, suspension or termination of the Plan shall, 
without the consent of the Holder, materially and adversely affect any rights or obligations under any Award theretofore granted 
or awarded, unless the Award itself otherwise expressly so provides.  No Awards may be granted or awarded during any period of 
suspension or after termination of the Plan.

14.2.Changes  in  Common  Stock  or  Assets  of  the  Company,  Acquisition  or  Liquidation  of  the  Company  and  Other 

Corporate Events.

(a)

In the event of any stock dividend, stock split, combination or exchange of shares, merger, consolidation 
or  other  distribution  (other  than  normal  cash  dividends)  of  Company  assets  to  stockholders,  or  any  other  change  affecting  the 
shares of the Company’s stock or the share price of the Company’s stock other than an Equity Restructuring, the Administrator 
may make equitable adjustments, if any, to reflect such change with respect to (i) the aggregate number and kind of shares that 
may be issued under the Plan (including, but not limited to, adjustments of the limitations in Section 3.1 hereof on the maximum 
number and kind of shares which may be issued under the Plan); (ii) the number and kind of shares of Common Stock (or other 
securities  or  property)  subject  to  outstanding  Awards;  (iii)  the  terms  and  conditions  of  any  outstanding  Awards  (including, 
without  limitation,  any  applicable  performance  targets  or  criteria  with  respect  thereto);  and  (iv)  the  grant  or  exercise  price  per 
share  for  any  outstanding  Awards  under  the  Plan.    Any  adjustment  affecting  an  Award  intended  as  Performance-Based 
Compensation shall be made consistent with the requirements of Section 162(m) of the Code.

(b)

In the event of any transaction or event described in Section 14.2(a) hereof or any unusual or nonrecurring 
transactions or events affecting the Company, any Affiliate of the Company, or the financial statements of the Company or any 
Affiliate, or of changes in Applicable Law, the Administrator, in its sole discretion, and on such terms and conditions as it deems 
appropriate, either by the terms of the Award or by action taken prior to the occurrence of such 

26

 
transaction or event and either automatically or upon the Holder’s request, is hereby authorized to take any one or more of the 
following  actions  whenever  the  Administrator  determines  that  such  action  is  appropriate  in  order  to  prevent  dilution  or 
enlargement of the benefits or potential benefits intended to be made available under the Plan or with respect to any Award under 
the Plan, to facilitate such transactions or events or to give effect to such changes in laws, regulations or principles:

(i) To provide for either (A) termination of any such Award in exchange for an amount of cash and/or 
other property, if any, equal to the amount that would have been attained upon the exercise of such Award or realization of the 
Holder’s rights (and, for the avoidance of doubt, if as of the date of the occurrence of the transaction or event described in this 
Section  14.2  the  Administrator  determines  in  good  faith  that  no  amount  would  have  been  attained  upon  the  exercise  of  such 
Award or realization of the Holder’s rights, then such Award may be terminated by the Company without payment) or (B) the 
replacement of such Award with other rights or property selected by the Administrator in its sole discretion having an aggregate 
value  not  exceeding  the  amount  that  could  have  been  attained  upon  the  exercise  of  such  Award  or  realization  of  the  Holder’s 
rights had such Award been currently exercisable or payable or fully vested;

(ii) To  provide  that  such  Award  be  assumed  by  the  successor  or  survivor  corporation,  or  a  parent  or 
subsidiary thereof, or shall be substituted for by similar options, rights or awards covering the stock of the successor or survivor 
corporation, or a parent or subsidiary thereof, with appropriate adjustments as to the number and kind of shares and prices;

(iii)To make adjustments in the number and type of shares of the Company’s stock (or other securities 
or property) subject to outstanding Awards, and in the number and kind of outstanding Restricted Stock or Deferred Stock and/or 
in the terms and conditions of (including the grant or exercise price), and the criteria included in, outstanding Awards and Awards 
which may be granted in the future;

covered thereby, notwithstanding anything to the contrary in the Plan or the applicable Program or Award Agreement; and

(iv)To provide that such Award shall be exercisable or payable or fully vested with respect to all shares 

(v) To provide that the Award cannot vest, be exercised or become payable after such event.

contrary in Sections 14.2(a) and 14.2(b) hereof:

(c)

In  connection  with  the  occurrence  of  any  Equity  Restructuring,  and  notwithstanding  anything  to  the 

price thereof, if applicable, shall be equitably adjusted; and/or

(i) The number and type of securities subject to each outstanding Award and the exercise price or grant 

(ii) The  Administrator  shall  make  such  equitable  adjustments,  if  any,  as  the  Administrator  in  its 
discretion may deem appropriate to reflect such Equity Restructuring with respect to the aggregate number and kind of shares 
that may be issued under the Plan (including, 

27

 
but not limited to, adjustments of the limitations in Section 3.1 hereof on the maximum number and kind of shares which may be 
issued under the Plan).

The  adjustments  provided  under  this  Section  14.2(c)  shall  be  nondiscretionary  and  shall  be  final  and  binding  on  the 

affected Holder and the Company.

(d) Change in Control.

(i) In  the  event  of  a  Change  in  Control,  each  outstanding  Award  shall  be  assumed  or  an  equivalent 
Award substituted by the successor corporation or a parent or subsidiary of the successor corporation, in each case, as determined 
by the Administrator.

(ii) In the event that the successor corporation in a Change in Control and its parents and subsidiaries 
refuse  to  assume  or  substitute  for  any  Award  in  accordance  with  Section  14.2(d)(i)  hereof,  each  such  non-assumed/substituted 
Award,  except  for  any  Performance  Awards,  shall  become  fully  vested  and,  as  applicable,  exercisable  and  shall  be  deemed 
exercised, immediately prior to the consummation of such transaction, and all forfeiture restrictions on any or all such Awards 
shall lapse at such time.  For the avoidance of doubt, the vesting of any Performance Awards not assumed in a Change in Control 
will not be automatically accelerated pursuant to this Section 14.2(d)(ii) and will instead vest pursuant to the terms and conditions 
of the applicable Award Agreement upon a Change in Control where the successor corporation and its parents and subsidiaries 
refuse to assume or substitute for any Award in accordance with Section 14.2(d)(i) hereof.  If an Award vests and, as applicable, 
is  exercised  in  lieu  of  assumption  or  substitution  in  connection  with  a  Change  in  Control,  the  Administrator  shall  notify  the 
Holder of such vesting and any applicable exercise period, and the Award shall terminate upon the Change in Control.  For the 
avoidance of doubt, if the value of an Award that is terminated in connection with this Section 14.2(d)(ii) is zero or negative at 
the  time  of  such  Change  in  Control,  such  Award  shall  be  terminated  upon  the  Change  in  Control  without  payment  of 
consideration therefor.

(iii)Notwithstanding  anything  to  the  contrary,  in  the  event  that,  within  the  twelve  (12)  month  period 
immediately following a Change in Control, a Holder experiences a Termination of Service by the Company for other than Cause 
or by a Holder for Good Reason, then the vesting and, if applicable, exercisability of that number of Shares equal to one hundred 
percent (100%) of the then-unvested Shares subject to the outstanding Awards held by such Holder shall accelerate upon the date 
of such Termination of Service.

The  Administrator  may,  in  its  sole  discretion,  include  such  further  provisions  and  limitations  in  any 
Award, agreement or certificate, as it may deem equitable and in the best interests of the Company that are not inconsistent with 
the provisions of the Plan.

(e)

(f) With  respect  to  Awards  which  are  granted  to  Covered  Employees  and  are  intended  to  qualify  as 
Performance-Based Compensation, no adjustment or action described in this Section 14.2 or in any other provision of the Plan 
shall  be  authorized  to  the  extent  that  such  adjustment  or  action  would  cause  such  Award  to  fail  to  so  qualify  as  Performance-
Based  Compensation,  unless  the  Administrator  determines  that  the  Award  should  not  so  qualify.    No  adjustment  or  action 
described in this Section 14.2 or in any other provision of the Plan shall be authorized to the extent that such adjustment or action 
would cause the Plan to violate Section 

28

 
422(b)(1) of the Code.    Furthermore,  no  such  adjustment  or  action  shall  be  authorized to the extent such adjustment or action 
would result in short-swing profits liability under Section 16 of the Exchange Act or violate the exemptive conditions of Rule 
16b-3 of the Exchange Act unless the Administrator determines that the Award is not to comply with such exemptive conditions.

(g)

The existence of the Plan, the Program, the Award Agreement and the Awards granted hereunder shall not 
affect or restrict in any way the right or power of the Company or the stockholders of the Company to make or authorize any 
adjustment,  recapitalization,  reorganization  or  other  change  in  the  Company’s  capital  structure  or  its  business,  any  merger  or 
consolidation  of  the  Company,  any  issue  of  stock  or  of  options,  warrants  or  rights  to  purchase  stock  or  of  bonds,  debentures, 
preferred or prior preference stocks whose rights are superior to or affect the Common Stock or the rights thereof or which are 
convertible into or exchangeable for Common Stock, or the dissolution or liquidation of the Company, or any sale or transfer of 
all or any part of its assets or business, or any other corporate act or proceeding, whether of a similar character or otherwise.

(h)

In  the  event  of  any  pending  stock  dividend,  stock  split,  combination  or  exchange  of  shares,  merger, 
consolidation or other distribution (other than normal cash dividends) of Company assets to stockholders, or any other change 
affecting the Shares or the share price of the Common Stock including any Equity Restructuring, for reasons of administrative 
convenience, the Company in its sole discretion may refuse to permit the exercise of any Award during a period of thirty (30) 
days prior to the consummation of any such transaction.

14.3.No  Stockholders  Rights.    Except  as  otherwise  provided  herein,  a  Holder  shall  have  none  of  the  rights  of  a 

stockholder with respect to Shares covered by any Award until the Holder becomes the record owner of such Shares.

14.4.Paperless Administration.  In the event that the Company establishes, for itself or using the services of a third party, 
an  automated  system  for  the  documentation,  granting  or  exercise  of  Awards,  such  as  a  system  using  an  internet  website  or 
interactive  voice  response,  then  the  paperless  documentation,  granting  or  exercise  of  Awards  by  a  Holder  may  be  permitted 
through the use of such an automated system.

14.5.Effect of Plan upon Other Compensation Plans.  The adoption of the Plan shall not affect any other compensation or 
incentive  plans  in  effect  for  the  Company  or  any  Affiliate.    Nothing  in  the  Plan  shall  be  construed  to  limit  the  right  of  the 
Company or any Affiliate:  (a) to establish any other forms of incentives or compensation for Employees of the Company or any 
Affiliate, or (b) to grant or assume options or other rights or awards otherwise than under the Plan in connection with any proper 
corporate purpose including without limitation, the grant or assumption of options in connection with the acquisition by purchase, 
lease,  merger,  consolidation  or  otherwise,  of  the  business,  stock  or  assets  of  any  corporation,  partnership,  limited  liability 
company, firm or association.

14.6.Compliance with Laws.  The Plan, the granting and vesting of Awards under the Plan and the issuance and delivery 
of Shares and the payment of money under the Plan or under Awards granted or awarded hereunder are subject to compliance 
with all Applicable Law, and to such approvals by any listing, regulatory or governmental authority as may, in the opinion of 

29

 
counsel for the Company, be necessary or advisable in connection therewith.  Any securities delivered under the Plan shall be 
subject to such restrictions, and the person acquiring such securities shall, if requested by the Company, provide such assurances 
and representations to the Company as the Company may deem necessary or desirable to assure compliance with all Applicable 
Law.  To the extent permitted by Applicable Law, the Plan and Awards granted or awarded hereunder shall be deemed amended 
to the extent necessary to conform to such Applicable Law.

14.7.Titles and Headings, References to Sections of the Code or Exchange Act.  The titles and headings of the Sections 
in the Plan are for convenience of reference only and, in the event of any conflict, the text of the Plan, rather than such titles or 
headings,  shall  control.  References  to  sections  of  the  Code  or  the  Exchange  Act  shall  include  any  amendment  or  successor 
thereto.

14.8.Governing Law.  The Plan and any agreements hereunder shall be administered, interpreted and enforced under the 

internal laws of the State of Delaware without regard to conflicts of laws thereof or of any other jurisdiction.

14.9.Section 409A.  To the extent that the Administrator determines that any Award granted under the Plan is subject to 
Section  409A  of  the  Code,  the  Program  pursuant  to  which  such  Award  is  granted  and  the  Award  Agreement  evidencing  such 
Award shall incorporate the terms and conditions required by Section 409A of the Code.  To the extent applicable, the Plan, the 
Program  and  any  Award  Agreements  shall  be  interpreted  in  accordance  with  Section  409A  of  the  Code  and  Department  of 
Treasury regulations and other interpretive guidance issued thereunder, including without limitation any such regulations or other 
guidance that may be issued after the Effective Date.  Notwithstanding any provision of the Plan to the contrary, in the event that 
following  the  Effective  Date  the  Administrator  determines  that  any  Award  may  be  subject  to  Section  409A  of  the  Code  and 
related Department of Treasury guidance (including such Department of Treasury guidance as may be issued after the Effective 
Date), the Administrator may adopt such amendments to the Plan and the applicable Program and Award Agreement or adopt 
other policies and procedures (including amendments, policies and procedures with retroactive effect), or take any other actions, 
that the Administrator determines are necessary or appropriate to (a) exempt the Award from Section 409A of the Code and/or 
preserve the intended tax treatment of the benefits provided with respect to the Award, or (b) comply with the requirements of 
Section 409A of the Code and related Department of Treasury guidance and thereby avoid the application of any penalty taxes 
under such Section.

14.10.No  Rights  to  Awards.    No  Eligible  Individual  or  other  person  shall  have  any  claim  to  be  granted  any  Award 
pursuant  to  the  Plan,  and  neither  the  Company  nor  the  Administrator  is  obligated  to  treat  Eligible  Individuals,  Holders  or  any 
other persons uniformly.

14.11.Unfunded  Status  of  Awards.    The  Plan  is  intended  to  be  an  “unfunded”  plan  for  incentive  compensation.    With 
respect to any payments not yet made to a Holder pursuant to an Award, nothing contained in the Plan or any Program or Award 
Agreement shall give the Holder any rights that are greater than those of a general creditor of the Company or any Affiliate.

30

 
14.12.Indemnification.  To the extent allowable pursuant to Applicable Law, each member of the Committee or of the 
Board  and  any  officer  or  other  employee  to  whom  authority  to  administer  any  component  of  the  Plan  is  delegated  shall  be 
indemnified and held harmless by the Company from any loss, cost, liability, or expense that may be imposed upon or reasonably 
incurred by such member in connection with or resulting from any claim, action, suit, or proceeding to which he or she may be a 
party or in which he or she may be involved by reason of any action or failure to act pursuant to the Plan and against and from 
any and all amounts paid by him or her in satisfaction of judgment in such action, suit, or proceeding against him or her; provided 
he or she gives the Company an opportunity, at its own expense, to handle and defend the same before he or she undertakes to 
handle and defend it on his or her own behalf.  The foregoing right of indemnification shall not be exclusive of any other rights of 
indemnification to which such persons may be entitled pursuant to the Company’s Certificate of Incorporation or Bylaws, as a 
matter of law, or otherwise, or any power that the Company may have to indemnify them or hold them harmless.

14.13.Relationship to other Benefits.  No payment pursuant to the Plan shall be taken into account in determining any 
benefits under any pension, retirement, savings, profit sharing, group insurance, welfare or other benefit plan of the Company or 
any Affiliate except to the extent otherwise expressly provided in writing in such other plan or an agreement thereunder.

14.14.Expenses.  The expenses of administering the Plan shall be borne by the Company and its Affiliates.

31

 
SYNLOGIC, INC.
2023 INDUCEMENT EQUITY INCENTIVE AWARD PLAN

STOCK OPTION GRANT NOTICE

Exhibit 10.7

Synlogic, Inc., a Delaware corporation, (the “Company”), pursuant to its 2023 Inducement Equity Incentive Award Plan, 
as may be amended from time to time (the “Plan”), hereby grants to the holder listed below (“Participant”), an option to purchase 
the number of shares of the Company’s common stock (“Stock”), set forth below (the “Option”).  This Option is subject to all of 
the terms and conditions set forth herein, as well as in the Plan and the Stock Option Agreement attached hereto as Exhibit A (the 
“Stock Option Agreement”), each of which are incorporated herein by reference.  Unless otherwise defined herein, the terms 
defined in the Plan shall have the same defined meanings in this Grant Notice and the Stock Option Agreement.

Participant:

Grant Date:

«Participant»

«Grant_Date»

Vesting Commencement Date:

«VCD»

Exercise Price per Share:

$[   ]

Total Exercise Price:

«Total_Price»

Total Number of Shares Subject 
to the Option:

«Shares» shares

Expiration Date:

«Expiration»

Vesting Schedule:

«Vesting_Schedule»

Type of Option:

Non-Qualified Stock Option

By his or her signature and the Company’s signature below, Participant agrees to be bound by the terms and conditions 
of the Plan, the Stock Option Agreement, and this Grant Notice.  Participant has reviewed the Stock Option Agreement, the Plan 
and this Grant Notice in their entirety, has had an opportunity to obtain the advice of counsel prior to executing this Grant Notice 
and fully understands all provisions of this Grant Notice, the Stock Option Agreement and the Plan.  Participant hereby agrees to 
accept as binding, conclusive and final all decisions or interpretations of the Administrator upon any questions arising under the 
Plan, this Grant Notice or the Stock Option Agreement.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SYNLOGIC, INC.:  

  PARTICIPANT:

By:   
Print Name: 
Title: 
Address:   

By: 
Print Name:  «Participant»

Address: 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT A
TO STOCK OPTION GRANT NOTICE

SYNLOGIC, INC. STOCK OPTION AGREEMENT

Pursuant to the Stock Option Grant Notice (the “Grant Notice”) to which this Stock Option Agreement (this 
“Agreement”) is attached, Synlogic, Inc., a Delaware corporation (the “Company”), has granted to Participant an Option under 
the Company’s 2023 Inducement Equity Incentive Award Plan, as may be amended from time to time (the “Plan”), to purchase 
the number of shares of Stock indicated in the Grant Notice.

ARTICLE 1.

GENERAL

1.1  Defined Terms.  Wherever the following terms are used in this Agreement they shall have the meanings specified 
below, unless the context clearly indicates otherwise. Capitalized terms not specifically defined herein shall have the meanings 
specified in the Plan and the Grant Notice.

1.2  Incorporation of Terms of Plan.  The Option is subject to the terms and conditions of the Plan which are 
incorporated herein by reference.  In the event of any inconsistency between the Plan and this Agreement, the terms of the Plan 
shall control.

ARTICLE 2.

GRANT OF OPTION

2.1  Grant of Option.  The Company and Participant understand and agree that the Option shall be granted in 
compliance with Nasdaq Listing Rule 5635(c)(4) as a material inducement to the Participant entering into employment with the 
Company. Effective as of the Grant Date set forth in the Grant Notice (the “Grant Date”), the Company irrevocably grants to 
Participant the Option to purchase any part or all of an aggregate of the number of shares of Stock set forth in the Grant Notice, 
upon the terms and conditions set forth in the Plan and this Agreement, subject to adjustments as provided in Section 14.2 of 
the Plan.  The Option shall be a Non-Qualified Stock Option.

2.2  Exercise Price.  The exercise price of the shares of Stock subject to the Option shall be as set forth in the Grant 
Notice, without commission or other charge; provided, however, that the price per share of the shares of Stock subject to the 
Option shall not be less than 100% of the Fair Market Value of a share of Stock on the Grant Date.  

2.3  Consideration to the Company.  In consideration of the grant of the Option by the Company, Participant agrees to 
render faithful and efficient services to the Company or any Affiliate.  Nothing in the Plan or this Agreement shall confer upon 
Participant any right to continue in the employ or service of the Company or any Affiliate or shall interfere with or restrict in 
any way the rights of the Company and its Affiliates, which rights are hereby expressly reserved, to discharge or terminate the 
services of Participant at any time for any 

 
 
 
 
 
 
 
 
 
 
 
 
reason whatsoever, with or without cause, except to the extent expressly provided otherwise in a written agreement between the 
Company or an Affiliate and Participant.

ARTICLE 3.

PERIOD OF EXERCISABILITY

3.1  Commencement of Exercisability.

such amounts and at such times as are set forth in the Grant Notice.

(a)  Subject to Sections 3.2, 3.3, 5.11 and 5.16 hereof, the Option shall become vested and exercisable in 

(b)  No portion of the Option which has not become vested and exercisable at the date of Participant’s 

Termination of Service shall thereafter become vested and exercisable, except as may be otherwise provided by the 
Administrator or as set forth in a written agreement between the Company and Participant.

event of a Change in Control the Option shall be treated pursuant to Section 14.2 of the Plan.

(c)  Notwithstanding Section 3.1(a) hereof and the Grant Notice, but subject to Section 3.1(b) hereof, in the 

3.2  Duration of Exercisability.  The installments provided for in the vesting schedule set forth in the Grant Notice are 

cumulative.  Each such installment which becomes vested and exercisable pursuant to the vesting schedule set forth in the 
Grant Notice shall remain vested and exercisable until it becomes unexercisable under Section 3.3 hereof.

3.3  Expiration of Option.  The Option may not be exercised to any extent by anyone after the first to occur of the 

following events:

from the Grant Date;

(a)  The Expiration Date set forth in the Grant Notice, which shall in no event be more than ten (10) years 

termination occurs by reason of Participant’s death or disability; or

(b)  The expiration of three (3) months from the date of Participant’s Termination of Service, unless such 

(c)  The expiration of one (1) year from the date of Participant’s Termination of Service by reason of 

Participant’s death or disability.

3.4  Tax Indemnity.

(a)  Participant agrees to indemnify and keep indemnified the Company, any Affiliate and Participant’s 

employing company, if different, from and against any liability for or obligation to pay any Tax Liability (a “Tax Liability” 
being any liability for income tax, withholding tax and any other employment related taxes or social security contributions in 
any jurisdiction) that is attributable to (1) the grant or exercise of, or any benefit derived by Participant from, the Option, (2) 
the acquisition by Participant of the Stock on exercise of the Option or (3) the disposal of any Stock.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(b)  The Option cannot be exercised until Participant has made such arrangements as the Company may 

require for the satisfaction of any Tax Liability that may arise in connection with the exercise of the Option and/or the 
acquisition of the Stock by Participant.  The Company shall not be required to issue, allot or transfer Stock until Participant has 
satisfied this obligation.

(c)  Participant hereby acknowledges that the Company (i) makes no representations or undertakings 

regarding the treatment of any Tax Liabilities in connection with any aspect of the Option and (ii) does not commit to and is 
under no obligation to structure the terms of the grant or any aspect of any Award, including the Option, to reduce or eliminate 
Participant’s liability for Tax Liabilities or achieve any particular tax result.  Furthermore, if Participant becomes subject to tax 
in more than one jurisdiction between the date of grant of an Award, including the Option, and the date of any relevant taxable 
event, Participant acknowledges that the Company may be required to withhold or account for Tax Liabilities in more than one 
jurisdiction.

ARTICLE 4.

EXERCISE OF OPTION

4.1  Person Eligible to Exercise.  Except as provided in Section 5.3 hereof, during the lifetime of Participant, only 

Participant may exercise the Option or any portion thereof, unless it has been disposed of pursuant to a DRO.  After the death 
of Participant, any exercisable portion of the Option may, prior to the time when the Option becomes unexercisable under 
Section 3.3 hereof, be exercised by the deceased Participant’s personal representative or by any person empowered to do so 
under the deceased Participant’s will or under the then applicable laws of descent and distribution.

4.2  Partial Exercise.  Any exercisable portion of the Option or the entire Option, if then wholly exercisable, may be 

exercised in whole or in part at any time prior to the time when the Option or portion thereof becomes unexercisable under 
Section 3.3 hereof.  However, the Option shall not be exercisable with respect to fractional shares of Stock.

4.3  Manner of Exercise.  The Option, or any exercisable portion thereof, may be exercised solely by delivery to the 

Secretary of the Company (or any third party administrator or other person or entity designated by the Company; for the 
avoidance of doubt, delivery shall include electronic delivery), during regular business hours, of all of the following prior to the 
time when the Option or such portion thereof becomes unexercisable under Section 3.3 hereof:

(a)  An exercise notice in a form specified by the Administrator, stating that the Option or portion thereof is 
thereby exercised, such notice complying with all applicable rules established by the Administrator.  The notice shall be signed 
by Participant or other person then entitled to exercise the Option or such portion of the Option;

(b)  The receipt by the Company of full payment for the shares of Stock with respect to which the Option or 

portion thereof is exercised, including payment of any applicable withholding tax, which shall be made by deduction from 
other compensation 

 
 
 
 
 
 
 
 
 
payable to Participant or in such other form of consideration permitted under Section 4.4 hereof that is acceptable to the 
Company;

to evidence compliance with the Securities Act, the Exchange Act or any other applicable law, rule or regulation; and

(c)  Any other written representations or documents as may be required in the Administrator’s sole discretion 

or persons other than Participant, appropriate proof of the right of such person or persons to exercise the Option.

(d)  In the event the Option or portion thereof shall be exercised pursuant to Section 4.1 hereof by any person 

Notwithstanding any of the foregoing, the Company shall have the right to specify all conditions of the manner of exercise, which 
conditions may vary by country and which may be subject to change from time to time.

4.4  Method of Payment.  Payment of the exercise price shall be by any of the following, or a combination thereof, at 

the election of Participant:

(a)  Cash or check;

(b)  With the consent of the Administrator, surrender of shares of Stock (including, without limitation, shares 
of Stock otherwise issuable upon exercise of the Option) held for such period of time as may be required by the Administrator 
in order to avoid adverse accounting consequences and having a Fair Market Value on the date of delivery equal to the 
aggregate exercise price of the Option or exercised portion thereof; or

(c)  Other legal consideration acceptable to the Administrator (including, without limitation, through the 

delivery of a notice that Participant has placed a market sell order with a broker with respect to shares of Stock then issuable 
upon exercise of the Option, and that the broker has been directed to pay a sufficient portion of the net proceeds of the sale to 
the Company in satisfaction of the Option exercise price; provided that payment of such proceeds is then made to the Company 
at such time as may be required by the Company, but in any event not later than the settlement of such sale).

4.5  Conditions to Issuance of Stock.  The shares of Stock deliverable upon the exercise of the Option, or any portion 

thereof, may be either previously authorized but unissued shares of Stock or issued shares of Stock which have then been 
reacquired by the Company.  Such shares of Stock shall be fully paid and nonassessable.  The Company shall not be required to 
issue or deliver any shares of Stock purchased upon the exercise of the Option or portion thereof prior to fulfillment of all of 
the conditions in Section 12.4 of the Plan and following conditions:

listed;

(a)  The admission of such shares of Stock to listing on all stock exchanges on which such Stock is then 

federal law or under rulings or regulations of the Securities and 

(b)  The completion of any registration or other qualification of such shares of Stock under any state or 

 
 
 
 
 
 
 
 
 
 
 
Exchange Commission or of any other governmental regulatory body, which the Administrator shall, in its absolute discretion, 
deem necessary or advisable;

the Administrator shall, in its absolute discretion, determine to be necessary or advisable;

(c)  The obtaining of any approval or other clearance from any state or federal governmental agency which 

applicable withholding tax, which may be in one or more of the forms of consideration permitted under Section 4.4 hereof; and

(d)  The receipt by the Company of full payment for such shares of Stock, including payment of any 

may from time to time establish for reasons of administrative convenience.

(e)  The lapse of such reasonable period of time following the exercise of the Option as the Administrator 

4.6  Rights as Stockholder.  The holder of the Option shall not be, nor have any of the rights or privileges of, a 

stockholder of the Company, including, without limitation, voting rights and rights to dividends, in respect of any shares of 
Stock purchasable upon the exercise of any part of the Option unless and until such shares of Stock shall have been issued by 
the Company and held of record by such holder (as evidenced by the appropriate entry on the books of the Company or of a 
duly authorized transfer agent of the Company).  No adjustment will be made for a dividend or other right for which the record 
date is prior to the date the shares of Stock are issued, except as provided in Section 14.2 of the Plan.

ARTICLE 5.

OTHER PROVISIONS

5.1  Administration.  The Administrator shall have the power to interpret the Plan and this Agreement and to adopt 

such rules for the administration, interpretation and application of the Plan as are consistent therewith and to interpret, amend 
or revoke any such rules.  All actions taken and all interpretations and determinations made by the Administrator in good faith 
shall be final and binding upon Participant, the Company and all other interested persons.  No member of the Committee or the 
Board shall be personally liable for any action, determination or interpretation made in good faith with respect to the Plan, this 
Agreement or the Option.

5.2  Whole Shares.  The Option may only be exercised for whole shares of Stock.

5.3  Option Not Transferable.

(a)  Subject to Section 4.1 hereof, the Option may not be sold, pledged, assigned or transferred in any manner 

other than by will or the laws of descent and distribution or, subject to the consent of the Administrator, pursuant to a DRO, 
unless and until the Option has been exercised and the shares of Stock underlying the Option have been issued, and all 
restrictions applicable to such shares of Stock have lapsed.  Neither the Option nor any interest or right therein shall be liable 
for the debts, contracts or engagements of Participant or his or her successors in interest or shall be subject to disposition by 
transfer, alienation, anticipation, 

 
 
 
 
 
 
 
 
 
 
 
pledge, hypothecation, encumbrance, assignment or any other means whether such disposition be voluntary or involuntary or 
by operation of law by judgment, levy, attachment, garnishment or any other legal or equitable proceedings (including 
bankruptcy) unless and until the Option has been exercised, and any attempted disposition thereof prior to exercise shall be null 
and void and of no effect, except to the extent that such disposition is permitted by the preceding sentence.

(b)  During the lifetime of Participant, only Participant may exercise the Option (or any portion thereof), unless 

it has been disposed of pursuant to a DRO; after the death of Participant, any exercisable portion of the Option may, prior to the 
time when such portion becomes unexercisable under the Plan or this Agreement, be exercised by Participant’s personal 
representative or by any person empowered to do so under the deceased Participant’s will or under the then-applicable laws of 
descent and distribution.

(c)  Notwithstanding any other provision in this Agreement, Participant may, in the manner determined by the 

Administrator, designate a beneficiary to exercise the rights of Participant and to receive any distribution with respect to the 
Option upon Participant’s death.  A beneficiary, legal guardian, legal representative, or other person claiming any rights pursuant 
to the Plan is subject to all terms and conditions of the Plan and this Agreement, except to the extent the Plan and this Agreement 
otherwise provide, and to any additional restrictions deemed necessary or appropriate by the Administrator.  If Participant is 
married or a domestic partner in a domestic partnership qualified under Applicable Law and resides in a community property 
state, a designation of a person other than Participant’s spouse or domestic partner, as applicable, as his or her beneficiary with 
respect to more than 50% of Participant’s interest in the Option shall not be effective without the prior written consent of 
Participant’s spouse or domestic partner.  If no beneficiary has been designated or survives Participant, payment shall be made to 
the person entitled thereto pursuant to Participant’s will or the laws of descent and distribution.  Subject to the foregoing, a 
beneficiary designation may be changed or revoked by Participant at any time provided the change or revocation is filed with the 
Administrator prior to Participant’s death.

5.4  Tax Consultation.  Participant understands that Participant may suffer adverse tax consequences as a result of the 

grant, vesting and/or exercise of the Option, and/or with the purchase or disposition of the shares of Stock subject to the 
Option.  Participant represents that Participant has consulted with any tax consultants Participant deems advisable in 
connection with the purchase or disposition of such shares of Stock and that Participant is not relying on the Company for any 
tax advice.

5.5  Binding Agreement.  Subject to the limitation on the transferability of the Option  contained herein, this 
Agreement will be binding upon and inure to the benefit of the heirs, legatees, legal representatives, successors and assigns of 
the parties hereto.

5.6  Adjustments Upon Specified Events.  The Administrator may accelerate the vesting of the Option in such 

circumstances as it, in its sole discretion, may determine.  In addition, upon the occurrence of certain events relating to the 
Stock contemplated by Section 14.2 of the Plan (including, without limitation, an extraordinary cash dividend on such Stock), 
the Administrator shall make such adjustments the Administrator deems appropriate in the 

 
 
 
 
 
 
number of shares of Stock subject to the Option, the exercise price of the Option and the kind of securities that may be issued 
upon exercise of the Option. Participant acknowledges that the Option is subject to adjustment, modification and termination in 
certain events as provided in this Agreement and Section 14.2 of the Plan.

5.7  Notices.  Any notice to be given under the terms of this Agreement to the Company shall be addressed to the 

Company in care of the Secretary of the Company at the Company’s principal office, and any notice to be given to Participant 
shall be addressed to Participant at Participant’s last address reflected on the Company’s records.  By a notice given pursuant to 
this Section 5.7, either party may hereafter designate a different address for notices to be given to that party.  Any notice which 
is required to be given to Participant shall, if Participant is then deceased, be given to the person entitled to exercise his or her 
Option pursuant to Section 4.1 hereof by written notice under this Section 5.7.  Any notice shall be deemed duly given when 
sent via email or when sent by certified mail (return receipt requested) and deposited (with postage prepaid) in a post office or 
branch post office regularly maintained by the United States Postal Service.

5.8  Titles.  Titles are provided herein for convenience only and are not to serve as a basis for interpretation or 

construction of this Agreement.

5.9  Governing Law.  The laws of the State of Delaware shall govern the interpretation, validity, administration, 

enforcement and performance of the terms of this Agreement regardless of the law that might be applied under principles of 
conflicts of laws.

5.10 Conformity to Securities Laws.  Participant acknowledges that the Plan and this Agreement are intended to 
conform to the extent necessary with all provisions of the Securities Act and the Exchange Act and any and all Applicable Law 
and regulations and rules promulgated by the Securities and Exchange Commission thereunder, and state securities laws and 
regulations.  Notwithstanding anything herein to the contrary, the Plan shall be administered, and the Option is granted and 
may be exercised, only in such a manner as to conform to such Applicable Law.  To the extent permitted by applicable law, the 
Plan and this Agreement shall be deemed amended to the extent necessary to conform to such Applicable Law.

5.11 Amendment, Suspension and Termination.  To the extent permitted by the Plan, this Agreement may be wholly or 
partially amended or otherwise modified, suspended or terminated at any time or from time to time by the Administrator or the 
Board; provided, however, that, except as may otherwise be provided by the Plan, no amendment, modification, suspension or 
termination of this Agreement shall adversely affect the Option in any material way without the prior written consent of 
Participant.

5.12 Successors and Assigns.  The Company may assign any of its rights under this Agreement to single or multiple 

assignees, and this Agreement shall inure to the benefit of the successors and assigns of the Company.  Subject to the 
restrictions on transfer herein set forth in Section 5.3 hereof, this Agreement shall be binding upon Participant and his or her 
heirs, executors, administrators, successors and assigns.

 
 
 
 
 
 
 
 
5.13 Limitations Applicable to Section 16 Persons.  Notwithstanding any other provision of the Plan or this 

Agreement, if Participant is subject to Section 16 of the Exchange Act, the Plan, the Option and this Agreement shall be subject 
to any additional limitations set forth in any applicable exemptive rule under Section 16 of the Exchange Act (including any 
amendment to Rule 16b-3 of the Exchange Act) that are requirements for the application of such exemptive rule.  To the extent 
permitted by applicable law, this Agreement shall be deemed amended to the extent necessary to conform to such applicable 
exemptive rule.

5.14 Not a Contract of Service Relationship.  Nothing in this Agreement or in the Plan shall confer upon Participant 

any right to continue to serve as an employee or other service provider of the Company or any of its Affiliates or interfere with 
or restrict in any way with the right of the Company or any of its Affiliates, which rights are hereby expressly reserved, to 
discharge or to terminate for any reason whatsoever, with or without cause, the services of Participant’s at any time.

5.15 Entire Agreement.  The Plan, the Grant Notice and this Agreement (including all Exhibits thereto) constitute the 

entire agreement of the parties and supersede in their entirety all prior undertakings and agreements of the Company and 
Participant with respect to the subject matter hereof.

5.16 Section 409A.  This Option is not intended to constitute “nonqualified deferred compensation” within the 

meaning of Section 409A of the Code (together with any Department of Treasury regulations and other interpretive guidance 
issued thereunder, including without limitation any such regulations or other guidance that may be issued after the date hereof, 
“Section 409A”).  However, notwithstanding any other provision of the Plan, the Grant Notice or this Agreement (or any 
Exhibits hereto), if at any time the Administrator determines that the Option (or any portion thereof) may be subject to Section 
409A, the Administrator shall have the right in its sole discretion (without any obligation to do so or to indemnify Participant 
or any other person for failure to do so) to adopt such amendments to the Plan, the Grant Notice or this Agreement (or any 
Exhibits hereto), or adopt other policies and procedures (including amendments, policies and procedures with retroactive 
effect), or take any other actions, as the Administrator determines are necessary or appropriate either for the Option to be 
exempt from the application of Section 409A or to comply with the requirements of Section 409A.

5.17 Limitation on Participant’s Rights.  Participation in the Plan confers no rights or interests other than as herein 
provided.  This Agreement creates only a contractual obligation on the part of the Company as to amounts payable and shall 
not be construed as creating a trust.  Neither the Plan nor any underlying program, in and of itself, has any assets.  Participant 
shall have only the rights of a general unsecured creditor of the Company with respect to amounts credited and benefits 
payable, if any, with respect to the Option, and rights no greater than the right to receive the Stock as a general unsecured 
creditor with respect to options, as and when exercised pursuant to the terms hereof.

5.18 Consent to Personal Data Use.  Participant acknowledges and agrees that the Company is permitted to collect, 

hold, store, process, modify, transfer, lock or delete certain personal (and sensitive) data in any medium about Participant (i.e., 
name, home address, telephone number, e-mail address, date of birth, tax identification number and payroll 

 
 
 
 
 
 
information) as a part of its personnel and other business records for the exclusive purpose of tracking stock option grants, 
processing stock option exercises and subsequent share transfers and sales, arranging for appropriate tax reporting and 
withholding and regulatory tracking and reporting purposes and the Company may disclose such information to third parties in 
the event that such disclosure is in the Company’s view required for the proper tracking of stock option grants, processing stock 
option exercises and subsequent share transfers and sales, arranging for appropriate tax reporting and withholding and 
regulatory tracking. For these purposes, this personal data will be transferred to other locations, including locations outside of 
the European Union and in so-called insecure third-party countries that do not guarantee the data privacy protection level of the 
European Union.

5.19 Rules Particular To Specific Countries.

(a)  Generally.  Participant shall, if required by the Administrator, enter into an election with the Company or 

an Affiliate (in a form approved by the Company) under which any liability to the Company’s (or an Affiliate’s) Tax Liability, 
including, but not limited to, National Insurance Contributions (“NICs”) and the Fringe Benefit Tax (“FBT”), is transferred to 
and met by Participant.  For purposes of this Section 5.19, Tax Liability shall mean any and all liability under applicable non-
U.S. laws, rules or regulations from any income tax, the Company’s (or an Affiliate’s) NICs, FBT or similar liability and 
Participant’s NICs, FBT or similar liability that are attributable to:  (A) the grant or exercise of, or any other benefit derived by 
Participant from the Option; (B) the acquisition by Participant of the shares of Stock on exercise of the Option; or (C) the 
disposal of any shares of Stock acquired upon exercise of the Option.

from and against any Tax Liability.

(b)  Tax Indemnity.  Participant shall indemnify and keep indemnified the Company and any of its Affiliates 

5.20 Clawback. Notwithstanding anything to the contrary contained in the Plan, the Company may recover from 

Participant any compensation received from the Option or cause Participant to forfeit the Option (whether or not vested) in the 
event that the Company’s Clawback Policy as then in effect is triggered.

*     *     *     *     *

 
 
 
 
 
 
 
 
Synlogic Operating Company, Inc.
301 Binney Street, Suite 402
Cambridge, MA 02142

Exhibit 10.16

Provided by February 9, 2024 
Dr. Aoife M. Brennan
Dear Aoife,

The purpose of this letter agreement (“Agreement”) is to confirm the terms of this separation of employment from Synlogic, Inc. 
(“Synlogic” or “the Company”).1 The Severance Pay and Benefits described below are contingent on your agreement to and compliance with 
the provisions of this Agreement, as set forth below. In order to accept the Severance Pay and Benefits offered in this Agreement, you must 
sign and return the same on, or before March 27, 2024. This Agreement shall be effective on the eighth (8th) day after you sign the same (the 
“Effective Date”).

1.

Separation of Employment. As previously communicated to you, your employment with the Company ends on March 9, 2024 
(the  “Separation  Date”).  You  acknowledge  that  from  and  after  the  Separation  Date,  you  have  no  authority  to,  and  shall  not, 
represent yourself as an employee or agent of the Company.

2.

Severance Pay and Benefits. If you comply with the terms of this Agreement, the Company will provide you with the following:

i.

Severance Pay in the form of a lump-sum payment equivalent to twelve (12) months of your base salary, or $628,305, less 
all  tax  withholdings  and  any  other  authorized  deductions  paid  within  thirty  (30)  days  of  you  returning  an  executed 
Agreement. Such payment is being made consistent with the terms of the Employment Letter Agreement dated October 1, 
2018 and the Amendment to the the Employment Letter Agreement, dated December 26, 2023 (collectively the “Brennan 
Employment Agreement”).

ii.

Health and Other Benefits.

a.

Health: You will have the right to continue your participation in Synlogic’s medical and dental insurance programs 
through your Separation Date. You will then have the right to continue your participation in Synlogic’s medical and 
dental  insurance  programs  subject  to  your  timely  applying  and  being  eligible  for  such  benefits  pursuant  to  the 
provisions of the Consolidated Omnibus Budget Reconciliation Act of 1985 (COBRA), subject to the requirements 
of COBRA and the continuation of the Company medical and dental plans by its insurance carrier. If you sign this 
Agreement and it becomes effective as set forth below, and elect COBRA coverage, the Company will continue to 
pay the Company premium for such coverage for twelve (12) months after your Separation Date. Your medical and 
dental plan contributions will be deducted from your severance pay. Thereafter, your continuation of your medical 
and dental insurance pursuant to the provisions of COBRA will be solely at your own cost. The “qualifying event” 
under  COBRA  shall  be  deemed  to  have  commenced  on  the  Separation  Date.  In  the  event  that  the  Company,  in
connection  with  the  winding  down  of  its  business,  terminates  its  group  health  plan  coverage,  the  Company  shall 
provide  you  with  a  taxable  lump  sum  payment  equal  to  the  cost  of  the  currently  selected  medical  benefit  option 
times the number of months remaining in the severance period following cessation of the Company’s group health 
plan coverage.

1 Except for the obligations set forth in Section 2 which shall be solely the obligations of Synlogic, Inc.,whenever the term Synlogic, Inc. is otherwise used 
in this Agreement (including, without limitation, Section 7), it shall be deemed to include Synlogic, Inc., and any and all of its divisions, affiliates and 
subsidiaries and all related entities (including investors), and its and their directors, officers, employees, agents, successors and assigns.

1

 
 
 
 
 
 
b.

2024 Bonus: You will be eligible for consideration of 100% of your target 2024 bonus, pro-rated by the number of 
days employed in 2024, in the amount of $65,327. The determination of whether to award a bonus and the amount 
of  such  bonus  shall  be  in  the  sole  discretion  of  the  Company  and  is  subject  to  the  approval  of  the  Board  of 
Directors. If such bonus is awarded,it is expected to be paid by no later than within thirty (30) days of you returning 
an  executed  Agreement.  You  acknowledge  and  agree  that  you  have  no  contractual  or  other  entitlement  to  such  a 
bonus.

ii.   You acknowledge and agree that the Severance Pay and Benefits set forth in the sub-sections above are consistent with the  
provisions of the Brennan Employment Agreement, and that your signing of this Agreement is a condition precedent to the receipt of such 
Severance Pay and Benefits.

Exhibit 10.16

3.

4.

Equity.  You  will  be  entitled  to  exercise  only  those  stock  options  or  RSAs  granted  to  you  and  which  are  vested  as  of  the
Separation  Date  under  the  applicable  Synlogic,  Inc.  equity  plans  and  any  amendments  to  those  plan  (the  “Equity  Plans”),and 
only in accordance with the terms and conditions of the Equity Plans. You acknowledge and agree that you do not and will not in 
the future have rights to vest in any other equity plans (of whatever name or kind) that you participated in or were eligible to 
participate in during your employment with the Company.

Acknowledgements. You acknowledge and agree that the Severance Pay and Benefits to be provided to you are not intended to,
and shall not constitute, a severance plan and shall confer no benefit on anyone other than the Company and you. You further 
acknowledge that except for any unpaid regular wages (including accrued and unused vacation) earned through the Separation 
Date, which shall be paid on or around the Separation Date, you have been paid and provided all wages, vacation pay, holiday 
pay, bonus, business expenses, and any other form of compensation or benefit that may be due to you now or which would have 
become due in the future in connection with your employment or separation of employment with the Company.

5.

Return of Property, Confidentiality, Non-Disparagement. You expressly acknowledge and agree to the following:

i.

That  you  will  abide  by  any  and  all  obligations  contained  in  agreements  you  have  executed(copies  of  which  can  be 
provided  to  you),  the  terms  of  which  are  hereby  incorporated  by  reference,  which  shall  survive  the  signing  of  this 
Agreement, and which you hereby affirm. You further agree that you otherwise will keep all confidential information and 
trade secrets of the Company confidential, and that you will abide by any and all common law and/or statutory obligations 
relating  to  protection  and  non-disclosure  of  the  Company’s  trade  secrets  and/or  confidential  and  proprietary  documents 
and information. Consistent with applicable law, the Company is providing you with the notice of immunity set forth in 
Exhibit A,which is a part of this Agreement and each other agreement referenced in this subsection.

ii. Without limiting the foregoing obligations, that by your Separation Date, you will promptly return to the Company all the 
Company documents (and any copies) and property (including all electronically stored information) regardless of where 
such  documents,  information  or  property  is  maintained.  You  acknowledge  and  agree  that  you  shall  not  maintain  any 
copies or duplicates of such documents or information. You further acknowledge that if you were to use or disclose any of 
the information reflected in such items, that this would cause immediate, substantial and irreparable harm to the Company. 

iii.

iv.

That all information relating in any way to the negotiation and terms of this Agreement (except for your obligations under 
Section  5(i)  above),  including  the  amount  of  financial  consideration  provided  for  in  this  Agreement,  shall  be  held 
confidential by you and shall not be publicized or disclosed to any person (other than an immediate family member, legal 
counsel, or financial advisor, provided that any such individual to whom disclosure is made agrees to be bound by these 
confidentiality obligations), business entity, or as otherwise mandated by state or federal law.

That you will not make any oral or written statements (including on any social media or other similar platform) that are 
professionally  or  personally  disparaging  about,  or  adverse  to,  the  interests  of  the  Company(including  its  officers, 
directors,  employees  and  consultants)  including,  but  not  limited  to,  any  statements  that  disparage  any  person,product, 
service, finances,financial condition, capability or any other aspect of the business of the Company, and that you will not 
engage in any conduct which could reasonably 

2

 
Exhibit 10.16

be  expected  to  harm  professionally  or  personally  the  reputation  of  the  Company  (including  its  officers,  directors, 
employees and consultants).

v.

vi.

That the Severance Pay and Benefits being offered are based on your representations that you have not engaged in any 
fraudulent or unlawful conduct, and that you have fully disclosed to the Company all material information relating to your 
job duties for the Company.

You agree that in the event of your breach of any of your agreements set forth in this Section 5 the Company would suffer 
substantial  irreparable  harm  and  that  the  Company  would  not  have  an  adequate  remedy  at  law  for  such  breach.  In 
recognition of the foregoing, you agree that in the event of a breach or threatened breach of any of these covenants, in 
addition  to  such  other  remedies  as  the  Company  may  have  at  law,  without  posting  any  bond  or  security,  the  Company 
shall  be  entitled  to  seek  and  obtain  equitable  relief,  in  the  form  of  specific  performance,  or  temporary,  preliminary  or 
permanent injunctive relief, or any other equitable remedy which then maybe available. The seeking of such injunction or 
order shall not affect the Company’s right to seek and obtain damages or other equitable relief on account of any such 
actual or threatened breach. You further agree that the Company shall be entitled to its costs and fees, including attorneys’ 
fees, incurred by it should it prevail in enforcing and provision of this Agreement.

6.

Cooperation/Transition of Duties. You agree that during the Severance Period you will make yourself reasonably available to the 
Company,  upon  reasonable  notice,  either  by  email,  telephone  or,  if  the  Company  believes  necessary,  in  person  to  assist  the 
Company in any matter relating to the services performed by you during your employment with the Company including, but not 
limited, transitioning your duties to others at the Company. You further agree that during this period of time and thereafter you
will cooperate fully with the Company in the defense or prosecution of any claims or actions now in existence or which may be 
brought  or  threatened  in  the  future  against  or  on  behalf  of  the  Company,  including  any  claim  or  action  against  its  directors, 
officers and employees. Your cooperation in connection with such claims or actions shall include, your being available, within 
reason  given  the  constraints  of  future  employment  or  job  search  activities,  to  meet  with  the  Company  to  prepare  for  any 
proceeding, to provide truthful affidavits and/or testimony, to assist with any audit, inspection, proceeding or other inquiry, and 
to  act  as  a  witness  in  connection  with  any  litigation  or  other  legal  proceeding  affecting  the  Company.  You  further  agree  that 
should  an  individual  representing  a  party  adverse  to  the  business  or  legal  interests  of  the  Company  (including,  without 
limitation,  anyone  threatening  any  form  of  legal  action  against  the  Company)  contact  you  (directly  or  indirectly),  you  will 
promptly (within 48 hours) inform the Company of that fact. Nothing herein shall be construed to prohibit or prevent you from 
cooperating with any government investigation (including maintaining the confidentiality of such investigation if required by the 
government), nor shall any such cooperation be deemed to be a violation of your obligations of non-disparagement set forth in 
Section 5(iv) above.

7.

Release of Claims. You hereby acknowledge and agree that by signing this Agreement, you are waiving your right to assert any 
Claim (as defined below) against Synlogic arising from acts or omissions that occurred on or before the Separation Date or the 
Effective Date, whichever is later. Please note definition of Synlogic contained in footnote 1 of this Agreement. 

Your  waiver  and  release  is  intended  to  bar  any  form  of  legal  claim,lawsuit,  charge,  complaint  or  any  other  form  of 
action  (jointly  referred  to  as  “Claims”)  against  the  Company  seeking  money  or  any  other  form  of  relief,  including  but  not 
limited  to  equitable  relief  (whether  declaratory,  injunctive  or  otherwise),  damages  or  any  other  form  of  monetary  recovery 
(including  but  not  limited  to  back  pay,  front  pay,  compensatory  damages,  emotional  distress  damages,  punitive  damages, 
attorneys’ fees and any other costs). You understand that there could be unknown or unanticipated Claims resulting from your 
employment with the Company and the termination of your employment, and you agree that such Claims are included in this 
waiver  and  release.  You  specifically  waive  and  release  the  Company  from  any  Claims  arising  from  or  related  to  your 
employment relationship with the Company or the termination of your employment, including without limitation Claims under 
any statute, ordinance, regulation, executive order, common law, constitution and/or other source of law of any state, country 
and/or  locality  (collectively  and  individually  referred  to  as  “Law”),  including  but  not  limited  to  the  United  States,  the 
Commonwealth of Massachusetts, and/or any other state or locality where you worked for the Company. 

3

 
Exhibit 10.16

Without  limiting  the  foregoing  general  waiver  and  release,  except  for  Claims  resulting  from  the  failure  of  the 
Company to perform its obligations under this Agreement, you specifically waive and release the Company from any Claims 
arising  from  or  related  to  your  employment  relationship  with  the  Company  or  the  termination  thereof,  including  without 
limitation:

i.

ii.

iii.

iv.

v.

Claims under any Law concerning discrimination, harassment, retaliation, or other fair employment practices, including, 
but not limited to the Massachusetts Anti-Discrimination and Anti-Harassment Law (M.G.L. c. 151B), the Massachusetts 
Sexual  Harassment  Law  (M.G.L.  c.  214,  §  1C),  the  Massachusetts  Equal  Pay  Act  (M.G.L.  c.  149,  §  105A),  the 
Massachusetts Civil Rights Act (M.G.L. c. 12, §§ 11H, 11I), the Massachusetts Equal Rights Act (M.G.L. c. 93, §§ 102, 
103), the Age Discrimination in Employment Act (29 U.S.C. § 621 et seq.), Title VII of the Civil Rights Act of 1964 (42 
U.S.C.  §  2000e  et  seq.),  42  U.S.C.  §  1981,  the  Civil  Rights  Act  of  1991,  Section1981  of  the  U.S.C.  Title  42,  the 
Americans with Disabilities Act (42 U.S.C. § 12101 et seq.), the Occupational Safety and Health Act, 29 U.S.C. §651 et 
seq. each as they may have been amended through the Separation Date or the Effective Date, whichever is later.

Claims under any Law relating to wages, hours, whistle blowing, leaves of absences or any other terms and conditions of 
employment,  including  but  not  limited  to  the  Family  and  Medical  Leave  Act  of  1993  (29  U.S.C.  §  2601  et  seq.),  the 
Emergency Family and Medical Leave Expansion Act (Pub. L. No. 116-127, § 3101, 134 Stat. 178, 189); the Emergency 
Paid Sick Leave Act (Pub. L. No. 116-127, § 5101, 134 Stat. 178, 195), the Employee Retirement Income Security Act 
(ERISA), the Fair Labor Standards Act, the Worker Adjustment and Retraining Notification (WARN) Act, the National 
Labor  Relations  Act  (NLRA),  the  American  Rescue  Plan  Act  of  2021,  the  Massachusetts  Payment  of  Wages  Law 
(Massachusetts  General  Laws  Chapter  149,  §§  148,  150),  Massachusetts  General  Laws  Chapter  149  in  its  entirety, 
Massachusetts  General  Laws  Chapter  151  in  its  entirety  (including  but  not  limited  to  the  minimum  wage  and  overtime 
provisions),  the  Massachusetts  Paid  Family  Medical  Leave  Act  (M.G.L.c.  175M  et seq.),  each  as  they  may  have  been 
amended through the Separation Date or the Effective Date, whichever is later. You specifically acknowledge that you are 
waiving any Claims for unpaid wages under these and other Laws.

Claims  under  any  local,  state  or  federal  common  law  theory  including,  without  limitation,  any  Claim  for  breach  of 
contract,  ownership  of  inventions  or  any  other  intellectual  property,  implied  contract,  misrepresentation  (intentional  or 
negligent),  fraud,  promissory  estoppel,unjust  enrichment,  quantum  meruit,  defamation  (libel  or  slander),or  any  other 
Claim sounding in contract or tort.

Claims arising under the Company’s policies or benefit plans.

Claims arising under any other Law or constitution.

Notwithstanding the foregoing, this Section shall not release Synlogic from any obligation expressly set forth in this 
Agreement.  You  acknowledge  and  agree  that,  but  for  providing  this  waiver  and  release,  you  would  not  be  receiving  the 
Severance Pay and Benefits provided for in this Agreement.

8.

OWBPA. Because you are at least forty (40) years of age, you have specific rights under the federal Age Discrimination in 
Employment Act (“ADEA”) and Older Workers Benefit Protection Act (“OWBPA”), which prohibit discrimination on the basis 
of age. The release in Section 7 is intended to release any Claim you may have against Synlogic alleging discrimination on the 
basis of age under the ADEA, OWBPA,and other Laws. Notwithstanding anything to the contrary in this Agreement, the release 
in Section 7 does not cover rights or Claims under the ADEA that arise after the date you sign this Agreement or the Effective 
Date, whichever is later.

Further, it is the Company’s desire and intent to make certain that you fully understand the provisions and effects of 
this  Agreement.  To  that  end,  the  Company  hereby  advises  you  in  writing  to  consult  with  legal  counsel  prior  to  signing  this 
Agreement for the purpose of reviewing the terms of this Agreement. Also, because you are at least age 40, and consistent with 
the  provisions  of  the  OWBPA,you  are  being  provided  with  certain  information,  in  the  chart  attached  as  Exhibit  B  to  this 
Agreement,  pertaining  to  the  ages  and  job  titles  of  employees  in  the  same  decisional  unit  who  are  affected  and  who  are  not 
affected  by  the  reduction  in  force  that  is  resulting  in  the  termination  of  your  employment.  In  addition,  consistent  with  the 
provisions of the OWBPA, 

4

 
 
Exhibit 10.16

the Company is providing you with over forty-five (45) days from the date you are provided this Agreement to consider and 
accept  the  terms  of  this  Agreement  by  signing  below  and  returning  it  to  Mary  Beth  Dooley,  Head  of  Finance  at 
marybeth@synlogictx.com or returning it to Synlogic, 301 Binney St, Cambridge, MA 02142 c/o Mary Beth Dooley, Head of 
Finance, and notifying Mary Beth Dooley by email that it has been sent by hard copy. You further agree that any changes to this 
Agreement  will  not  restart  the  running  of  this  45-day  period.  In  addition,  you  may  rescind  your  assent  to  this  Agreement  if, 
within  seven(7)  days  after  you  sign  this  Agreement,  you  deliver  a  notice  of  rescission  to  Synlogic.  To  be  effective,  such 
rescission  must  be  hand  delivered  or  postmarked  within  the  seven  (7)  day  period  and  sent  by  certified  mail,  return  receipt 
requested, to Mary Beth Dooley at Synlogic at the above referenced address.

Also, consistent with the provisions of state and federal discrimination laws (the “Discrimination Laws”), nothing in 
the general waiver and release set forth in Section 7 above shall be deemed to prohibit you from challenging the validity of this 
release under the Discrimination Laws or from filing a charge or complaint of age or other related discrimination with the Equal 
Employment  Opportunity  Commission  (“EEOC”)  or  similar  state  agency,  or  from  participating  in  any  investigation  or 
proceeding conducted by the EEOC or such state agency. However, the release in Section 7 does prohibit you from seeking or 
receiving monetary damages or other individual-specific relief in connection with any such charge or complaint of age or other 
work-related  discrimination.  Further,  nothing  in  this  Agreement  shall  be  deemed  to  limit  Synlogic’s  right  to  seek  immediate 
dismissal  of  such  charge  or  complaint  on  the  basis  that  your  signing  of  this  Agreement  constitutes  a  full  release  of  any 
individual  rights  under  the  Discrimination  Laws,  or  Synlogic’s  right  to  seek  restitution  or  other  legal  remedies  to  the  extent 
permitted by law of the economic benefits provided to you under this Agreement in the event that you successfully challenge 
the validity of this release and prevail in any claim under the Discrimination Laws.

9.

Consequences  of  Breach.  In  addition  to  any  other  remedies  set  forth  in  this  Agreement,  a  breach  by  you  of  any  of  your 
obligations set forth in this Agreement shall constitute a material breach of this Agreement and, in addition to any other legal or 
equitable remedy available to Synlogic, shall entitle Synlogic to cease any further payment of the Severance Pay and Benefits, 
and to recover any Severance Pay or Benefits or its support for other benefits already provided to you. Regardless of any such 
breach, your release set forth in Section 7 above shall remain in full force and effect.

10.

Entire Agreement/Choice of Law/Enforceability/Jury Waiver/Successors and Assigns.

i.

ii.

iii.

iv.

Except as otherwise expressly provided in this Agreement, this Agreement supersedes any and all other prior oral and/or 
written agreements and sets forth the entire agreement between you and Synlogic. No variations or modifications hereof 
shall be deemed valid unless reduced to writing and signed by the parties hereto.

This Agreement shall be governed by the law of the state where you reside on the date you sign this Agreement, without 
giving effect to conflict of law principles.

Both parties further agree that any action, demand, claim or counterclaim relating to this Agreement shall be resolved by a 
judge alone, and both parties hereby waive and forever renounce the right to a trial before a civil jury.

If your release of Claims pursuant to Section 7 is determined to be unenforceable in whole or part, the Company will have 
the option, in its sole discretion, to either (a) declare the entire Agreement null and void and require you to refund the 
Severance Pay and Benefits provided for in this Agreement; or (b) enforce the portions of the Agreement found not to be 
unenforceable. In the event that any other provision of this Agreement is determined to be unenforceable in whole or part, 
the remainder of the Agreement shall be enforced in full.

v.

This Agreement shall inure to the benefit of Synlogic and any of its successors and assigns.

It is Synlogic’s desire and intent to make certain that you fully understand the provisions and effects of this Agreement. By 
executing this Agreement, you are acknowledging (a) that you have been afforded sufficient time to understand the terms and effects 
of this Agreement and to consult with legal counsel, (b) that your agreements and 

5

 
 
obligations  hereunder  are  made  voluntarily,  knowingly  and  without  duress,  and  (c)  that  neither  Synlogic  nor  its  agents  or 
representatives have made any representations inconsistent with the provisions of this Agreement.

If you agree to the terms of this Agreement, please sign and return the enclosed copy of this Agreement by no later than March 27, 

Exhibit 10.16

2024.

Very truly yours,

Synlogic, Inc. 

By:  /s/ Tony Awad  
Tony Awad COO 
Dated: February 16, 2024 

Accepted and Agreed To:

/s/ Aoife Brennan 
Dated: 2/17/2024

6

 
 
 
  
    
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.18

Provided on November 9, 2023 
Michael Jensen
____________
Dear Michael,

The purpose of this letter agreement (“Agreement”) is to confirm the terms of your voluntary separation of employment 
from  Synlogic,  Inc.  (“Synlogic”  or  “the  Company”).1The  Bonus  Pay  and  Benefits  described  below  are  contingent  on  your 
agreement to and compliance with the provisions of this Agreement, as set forth below. In order to accept the Bonus Pay and 
Benefits offered in this Agreement, you must sign and return the same on, or before November 30, 2023. This Agreement shall be 
effective on the eighth (8th) day after you sign the same (the “Effective Date”).

1.

Separation of Employment.  You  have  notified  us  of  your  intent  to  resign,  effective  December  1,  2023.  Upon  your 
execution of this document,you shall be deemed to have resigned, with an effective date of resignation of December 
1, 2023 (the “Separation Date”). You acknowledge that from and after the Separation Date, you have no authority to, 
and shall not, represent yourself as an employee or agent of the Company. Until the Separation Date, you agree, under 
the direction of Synlogic, to assist Synlogic in the transition of work in connection with any of the duties you have 
performed at the Company, or otherwise perform any specific project(s) assigned to you by the Company.

2.

Bonus  Pay  and  Benefits.  Conditioned  upon  your  signing  and  compliance  with  the  terms  of  this  Agreement,  and 
subject to Board approval,the Company will provide you with the following:

i.

ii.

Lump-sum  amount:  A  lump-sum  payment  equal  to  $149,178  in  lieu  of  any  other  bonus  that  you  would  be 
eligible for the fiscal year 2023, payable by December 31, 2023.

Health  Benefits.  You  will  have  the  right  to  continue  your  participation  in  Synlogic’s  medical  and  dental 
insurance programs through your Separation Date. You will then have the right to continue your participation in 
Synlogic’s medical and dental insurance programs subject to your timely applying and being eligible for such 
benefits pursuant to the provisions of the Consolidated Omnibus Budget Reconciliation Act of 1985 (COBRA). 
If you sign this Agreement and it becomes effective as set forth below, the Company will continue to pay the 
Company  premium  for  such  coverage  for  six  (6)  months  following  the  Separation  Date.  Thereafter,  your 
continuation of your medical and dental insurance pursuant to the provisions of COBRA will be solely at your 
own cost. The “qualifying event” under COBRA shall be deemed to have commenced on the Separation Date.

3.

Equity. You will be entitled to exercise only those stock options granted to you and which are vested as of the 
Separation Date under the applicable Synlogic, Inc. equity plans and any amendments to those plan (the “Equity 
Plans”), and only in accordance with the terms and conditions of the Equity Plans. You acknowledge and agree that 
you do not and will not in the future have rights to vest in any other equity plans (of whatever name or kind) that you 
participated in or were eligible to participate in during your employment with the Company.

1 Except for the obligations set forth in Section 2 which shall be solely the obligations of Synlogic, Inc., whenever the term Synlogic, Inc. is otherwise used 
in this Agreement (including, without limitation, Section 7), it shall be deemed to include Synlogic, Inc., and any 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.18

and  all  of  its  divisions,  affiliates  and  subsidiaries  and  all  related  entities  (including  investors),  and  its  and  their  directors,  officers,  employees,  agents, 
successors and assigns.

4.

Acknowledgements. You acknowledge and agree that the Bonus Pay and Benefits are intended to be and are in lieu of
any Severance Pay and Benefits that you may be eligible for pursuant to an a January 24, 2022 Employment Letter 
Agreement,  and  that  you  will  have  no  entitlement  to  any  compensation,  other  payments  or  benefits  under  the 
Employment Agreement or any other agreement between you and the Company. You acknowledge and agree that the 
Bonus Pay and Benefits to be provided to you are not intended to, and shall not constitute, a severance plan and shall 
confer no benefit on anyone other than the Company and you. You further acknowledge that except for any unpaid 
regular wages (including accrued and unused vacation) earned through the Separation Date, which shall be paid on or 
around the Separation Date, you have been paid and provided all wages, vacation pay, holiday pay, bonus, business 
expenses, and any other form of compensation or benefit that may be due to you now or which would have become 
due in the future in connection with your employment or separation of employment with the Company.

5.

Return of Property, Confidentiality, Non-Disparagement. You expressly acknowledge and agree to the following:

i.

That you will abide by any and all obligations contained in agreements you have executed including the Non-
Competition, Non-Solicitation Agreement, Invention and Non-Disclosure Agreements (copies of which can be 
provided to you), the terms of which are hereby incorporated by reference, which shall survive the signing of 
this Agreement, and which you hereby affirm. You further agree that you otherwise will keep all confidential 
information and trade secrets of the Company confidential, and that you will abide by any and all common law 
and/or  statutory  obligations  relating  to  protection  and  non-disclosure  of  the  Company’s  trade  secrets  and/or 
confidential  and  proprietary  documents  and  information.  Consistent  with  applicable  law,  the  Company  is 
providing you with the notice of immunity set forth in Exhibit A, which is a part of this Agreement and each 
other agreement referenced in this subsection.

ii. Without  limiting  the  foregoing  obligations,  that  you  will  promptly  return  to  the  Company  all  the  Company 
documents(and  any  copies)and  property  (including  all  electronically  stored  information)  regardless  of  where 
such documents, information or property is maintained. You acknowledge and agree that you shall not maintain 
any copies or duplicates of such documents or information.You further acknowledge that if you were to use or
disclose  any  of  the  information  reflected  in  such  items,  that  this  would  cause  immediate,  substantial  and 
irreparable harm to the Company.

iii.

That you will not make any oral or written statements (including on any social media or other similar platform) 
that are professionally or personally disparaging about, or adverse to, the interests of the Company(including its 
officers,directors, employees and consultants) including, but not limited to, any statements that disparage any 
person,product,  service,  finances,financial  condition,  capability  or  any  other  aspect  of  the  business  of  the 
Company,  and  that  you  will  not  engage  in  any  conduct  which  could  reasonably  be  expected  to  harm 
professionally  or  personally  the  reputation  of  the  Company  (including  its  officers,  directors,  employees  and 
consultants). 

iv.

That the Bonus Pay and Benefits being offered are based on your representations that you have not engaged in 
any fraudulent or unlawful conduct, and that you have fully disclosed to the Company all material information 
relating to your job duties for the Company.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.18

6.

v.

You agree that in the event of your breach of any of your agreements set forth in this Section 5 the Company 
would suffer substantial irreparable harm and that the Company would not have an adequate remedy at law for 
such breach. In recognition of the foregoing, you agree that in the event of a breach or threatened breach of any 
of these covenants, in addition to such other remedies as the Company may have at law, without posting any 
bond  or  security,  the  Company  shall  be  entitled  to  seek  and  obtain  equitable  relief,  in  the  form  of  specific 
performance,  or  temporary,  preliminary  or  permanent  injunctive  relief,  or  any  other  equitable  remedy  which 
then may be available. The seeking of such injunction or order shall not affect the Company’s right to seek and 
obtain damages or other equitable relief on account of any such actual or threatened breach. You further agree 
that the Company shall be entitled to its costs and fees, including attorneys’ fees, incurred by it should it prevail 
in enforcing and provision of this Agreement.

Cooperation/Transition of Duties. You agree that from now until January 30, 2024 you will make yourself reasonably 
available to the Company, upon reasonable notice, either by email, telephone or, if the Company believes necessary, 
in person to assist the Company in any matter relating to the services performed by you during your employment with 
the  Company  including,  but  not  limited,transitioning  your  duties  to  others  at  the  Company.  You  further  agree  that 
during this period of time and thereafter you will cooperate fully with the Company in the defense or prosecution of 
any claims or actions now in existence or which may be brought or threatened in the future against or on behalf of the 
Company, including any claim or action against its directors, officers and employees. Your cooperation in connection 
with  such  claims  or  actions  shall  include,  your  being  available,  within  reason  given  the  constraints  of  future 
employment or job search activities, to meet with the Company to prepare for any proceeding, to provide truthful 
affidavits and/or testimony, to assist with any audit, inspection, proceeding or other inquiry, and to act as a witness in 
connection  with  any  litigation  or  other  legal  proceeding  affecting  the  Company.  You  further  agree  that  should  an 
individual  representing  a  party  adverse  to  the  business  or  legal  interests  of  the  Company  (including,  without 
limitation, anyone threatening any form of legal action against the Company) contact you (directly or indirectly), you 
will  promptly  (within  48  hours)  inform  the  Company  of  that  fact.  Nothing  herein  shall  be  construed  to  prohibit  or 
prevent you from cooperating with any government investigation (including maintaining the confidentiality of such 
investigation  if  required  by  the  government),  nor  shall  any  such  cooperation  be  deemed  to  be  a  violation  of  your 
obligations of non- disparagement set forth in Section 5(iii) above.

7.

Release of Claims. You hereby acknowledge and agree that by signing this Agreement, you are waiving your right to 
assert any Claim (as defined below) against Synlogic arising from acts or omissions that occurred on or before the 
Separation Date or the Effective Date, whichever is later. Please note the definition of Synlogic contained in footnote 
1 of this Agreement.

Your waiver and release is intended to bar any form of legal claim, lawsuit, charge, complaint or any other 
form  of  action  (jointly  referred  to  as  “Claims”)  against  the  Company  seeking  money  or  any  other  form  of  relief, 
including but not limited to equitable relief (whether declaratory,injunctive or otherwise), damages or any other form 
of  monetary  recovery  (including  but  not  limited  to  back  pay,  front  pay,  compensatory  damages,  emotional  distress 
damages,  punitive  damages,  attorneys’  fees  and  any  other  costs).  You  understand  that  there  could  be  unknown  or 
unanticipated Claims resulting from your employment with the Company and the termination of your employment, 
and  you  agree  that  such  Claims  are  included  in  this  waiver  and  release.  You  specifically  waive  and  release  the 
Company  from  any  Claims  arising  from  or  related  to  your  employment  relationship  with  the  Company  or  the 
termination  of  your  employment,  including  without  limitation  Claims  under  any  statute,  ordinance,  regulation, 
executive order, common law, constitution and/or other source of law of any state, country 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.18

and/or locality (collectively and individually referred to as “Law”), including but not limited to the United States, the 
Commonwealth of Massachusetts, and/or any other state or locality where you worked for the Company. 

Without limiting the foregoing general waiver and release,except for Claims resulting from the failure of the 
Company to perform its obligations under this Agreement, you specifically waive and release the Company from any 
Claims  arising  from  or  related  to  your  employment  relationship  with  the  Company  or  the  termination  thereof, 
including without limitation:

i.

ii.

Claims under any Law concerning discrimination, harassment, retaliation, or other fair employment practices, 
including,  but  not  limited  to  the  Massachusetts  Anti-  Discrimination  and  Anti-Harassment  Law  (M.G.L.  c. 
151B),  the  Massachusetts  Sexual  Harassment  Law  (M.G.L.  c.  214,  §  1C),  the  Massachusetts  Equal  Pay  Act
(M.G.L. c. 149, § 105A), the Massachusetts Civil Rights Act (M.G.L. c. 12, §§ 11H, 11I), the Massachusetts 
Equal Rights Act (M.G.L. c. 93, §§ 102, 103), the Age Discrimination in Employment Act (29 U.S.C. § 621 et 
seq.), Title VII of the Civil Rights Act of 1964 (42 U.S.C.§ 2000e et seq.), 42 U.S.C.§ 1981, the Civil Rights 
Act  of  1991,  Section1981  of  the  U.S.C.  Title  42,  the  Americans  with  Disabilities  Act  (42  U.S.C.  §  12101  et 
seq.),  the  Occupational  Safety  and  Health  Act,  29  U.S.C.  §651  et  seq.  each  as  they  may  have  been  amended 
through the Separation Date or the Effective Date, whichever is later.

Claims  under  any  Law  relating  to  wages,  hours,whistleblowing,  leaves  of  absences  or  any  other  terms  and 
conditions of employment, including but not limited to the Family and Medical Leave Act of 1993 (29 U.S.C. § 
2601 et seq.), the Emergency Family and Medical Leave Expansion Act (Pub. L. No. 116-127, § 3101, 134 Stat. 
178,  189);  the  Emergency  Paid  Sick  Leave  Act  (Pub.  L.  No.  116-127,  §  5101,  134  Stat.  178,  195),  the 
Employee Retirement Income Security Act (ERISA), the Fair Labor Standards Act, the Worker Adjustment and 
Retraining  Notification  (WARN)  Act,  the  National  Labor  Relations  Act  (NLRA),  the  American  Rescue  Plan 
Act  of  2021,  the  Massachusetts  Payment  of  Wages  Law  (Massachusetts  General  Laws  Chapter  149,  §§  148, 
150), Massachusetts General Laws Chapter 149 in its entirety, Massachusetts General Laws Chapter 151 in its 
entirety  (including  but  not  limited  to  the  minimum  wage  and  overtime  provisions),  the  Massachusetts  Paid 
Family  Medical  Leave  Act  (M.G.L.  c.  175M  et  seq.),  each  as  they  may  have  been  amended  through  the 
Separation Date or the Effective Date, whichever is later. You specifically acknowledge that you are waiving 
any Claims for unpaid wages under these and other Laws.

iii. Claims under any local, state or federal common law theory including, without limitation, any Claim for breach 
of  contract,  ownership  of  inventions  or  any  other  intellectual  property,  implied  contract,  misrepresentation 
(intentional or negligent), fraud, promissory estoppel, unjust enrichment, quantum meruit, defamation (libel or 
slander), or any other Claim sounding in contract or tort.

iv.

v.

Claims arising under the Company’s policies or benefit plans.

Claims arising under any other Law or constitution.

Notwithstanding the foregoing, this Section shall not release Synlogic from any obligation expressly set forth in 
this  Agreement.  You  acknowledge  and  agree  that,  but  for  providing  this  waiver  and  release,  you  would  not  be 
receiving the Bonus Pay and Benefits provided for in this Agreement.

8.

OWBPA. Because you are at least forty (40) years of age, you have specific rights under the federal Age 
Discrimination in Employment Act (“ADEA”) and Older Workers Benefit Protection Act 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.18

(“OWBPA”), which prohibit discrimination on the basis of age. The release in Section 7 is intended to release any 
Claim you may have against Synlogic alleging discrimination on the basis of age under the ADEA, OWBPA, and 
other Laws. Notwithstanding anything to the contrary in this Agreement, the release in Section 7 does not cover rights 
or Claims under the ADEA that arise after the date you sign this Agreement or the Effective Date, whichever is later.

Further, it is the Company’s desire and intent to make certain that you fully understand the provisions and 
effects of this Agreement. To that end, the Company hereby advises you in writing to consult with legal counsel prior 
to signing this Agreement for the purpose of reviewing the terms of this Agreement. Also, because you are at least 
age 40, and consistent with the provisions of the OWBPA, the Company is providing you with twenty-one (21) days 
from the date you are provided this Agreement (until November 30, 2023) to consider and accept the terms of this 
Agreement by signing below and returning it to Synlogic, 301 Binney St, Cambridge, MA 02142 c/o Adam Thomas, 
CHRO.  In  addition,  you  may  rescind  your  assent  to  this  Agreement  if,  within  seven  (7)  days  after  you  sign  this 
Agreement, you deliver a notice of rescission to Adam Thomas at Synlogic. To be effective, such rescission must be 
hand delivered or postmarked within the seven (7) day period and sent by certified mail, return receipt requested, to 
Adam Thomas at Synlogic at the above referenced address.

Also,  consistent  with  the  provisions  of  state  and  federal  discrimination  laws  (the  “Discrimination  Laws”), 
nothing  in  the  general  waiver  and  release  set  forth  in  Section  7  above  shall  be  deemed  to  prohibit  you  from 
challenging the validity of this release under the Discrimination Laws or from filing a charge or complaint of age or 
other related discrimination with the Equal Employment Opportunity Commission (“EEOC”) or similar state agency, 
or from participating in any investigation or proceeding conducted by the EEOC or such state agency. However, the 
release in Section 7 does prohibit you from seeking or receiving monetary damages or other individual-specific relief 
in connection with any such charge or complaint of age or other work-related discrimination. Further, nothing in this 
Agreement shall be deemed to limit Synlogic’s right to seek immediate dismissal of such charge or complaint on the 
basis that your signing of this Agreement constitutes a full release of any individual rights under the Discrimination 
Laws, or Synlogic’s right to seek restitution or other legal remedies to the extent permitted by law of the economic 
benefits provided to you under this Agreement in the event that you successfully challenge the validity of this release 
and prevail in any claim under the Discrimination Laws.

9.

Consequences of Breach. In addition to any other remedies set forth in this Agreement, a breach by you of any of 
your obligations set forth in this Agreement shall constitute a material breach of this Agreement and, in addition to 
any other legal or equitable remedy available to Synlogic, shall entitle Synlogic to cease any further payment of the 
Bonus Pay and Benefits, and to recover any Bonus Pay or Benefits or its support for other benefits already provided 
to you. Regardless of any such breach, your release set forth in Section 7 above shall remain in full force and effect.

10. Company Instruction. The Company agrees to instruct its Board members and its executives (at the Vice President 
level and above) to not make any oral or written statements (including on any social media or other similar platform) 
that  are  professionally  or  personally  disparaging  about  you,  your  performance  or  reputation,  or  adverse  to,  your 
interests,  and  that  such  individuals  will  be  instructed  not  to  engage  in  any  conduct  which  could  reasonably  be 
expected  to  harm  professionally  or  personally  your  reputation.  You  understand  and  agree  that  the  Company’s  sole 
obligation hereunder is to provide such instructions, and it is not responsible nor shall it be liable in the event any 
instructed individual violates 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.18

such instruction. You further understand that nothing herein shall prevent the Company from making statements that 
it deems necessary in the interests of the business.

11. Entire Agreement/Choice of Law/Enforceability/Jury Waiver/Successors and Assigns.

i.

ii.

Except as otherwise expressly provided in this Agreement, this Agreement supersedes any and all other prior 
oral and/or written agreements and sets forth the entire agreement between you and Synlogic. No variations or 
modifications hereof shall be deemed valid unless reduced to writing and signed by the parties hereto.

This Agreement shall be governed by the law of the state where you reside on the date you sign this Agreement, 
without giving effect to conflict of law principles. 

iii. Both  parties  further  agree  that  any  action,  demand,claim  or  counterclaim  relating  to  this  Agreement  shall  be 
resolved by a judge alone, and both parties hereby waive and forever renounce the right to a trial before a civil 
jury.

iv.

If  your  release  of  Claims  pursuant  to  Section  7  is  determined  to  be  unenforceable  in  whole  or  part,  the 
Company will have the option, in its sole discretion, to either (a) declare the entire Agreement null and void and 
require you to refund the Bonus Pay and Benefits provided for in this Agreement; or (b) enforce the portions of 
the  Agreement  found  not  to  be  unenforceable.  In  the  event  that  any  other  provision  of  this  Agreement  is 
determined to be unenforceable in whole or part, the remainder of the Agreement shall be enforced in full.

v.

This Agreement shall inure to the benefit of Synlogic and any of its successors and assigns.

It  is  Synlogic’s  desire  and  intent  to  make  certain  that  you  fully  understand  the  provisions  and  effects  of  this 
Agreement.  By  executing  this  Agreement,  you  are  acknowledging  (a)  that  you  have  been  afforded  sufficient  time  to 
understand  the  terms  and  effects  of  this  Agreement  and  to  consult  with  legal  counsel,  (b)  that  your  agreements  and 
obligations hereunder are made voluntarily, knowingly and without duress, and (c) that neither Synlogic nor its agents or 
representatives have made any representations inconsistent with the provisions of this Agreement.

If you agree to the terms of this Agreement, please sign and return the enclosed copy of this Agreement by no later than 

November 30, 2023.

Very truly yours,

Synlogic, Inc. 

Accepted and Agreed To:

By: /s/ Adam Thomas 
Adam J. Thomas, CPO   
Dated: 11/13/2023   

/s/ Michael Jensen 

  Michael Jensen

Dated: 11/13/2023

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Synlogic Operating Company, Inc.
301 Binney Street, Suite 402
Cambridge, MA 02142

Exhibit 10.22

Provided by February 16, 2024 
Tony Awad
Dear Tony,

The purpose of this letter agreement (“Agreement”) is to confirm the terms of this separation of employment from Synlogic, Inc. 
(“Synlogic” or “the Company”).1 The Severance Pay and Benefits described below are contingent on your agreement to and compliance with 
the provisions of this Agreement, as set forth below. In order to accept the Severance Pay and Benefits offered in this Agreement, you must 
sign and return the same on, or before April 1, 2024. This Agreement shall be effective on the eighth (8th) day after you sign the same (the 
“Effective Date”).

1.

Separation of Employment. As previously communicated to you, your employment with the Company ends on 5/30/2024 (the 
“Separation Date”). You acknowledge that from and after the Separation Date, you have no authority to, and shall not, represent 
yourself as an employee or agent of the Company.

2.

Severance Pay and Benefits. If you comply with the terms of this Agreement, the Company will provide you with the following:

i.

Severance Pay in the form of a lump-sum payment equivalent to six (6) months of your base salary, or $218,856 less all 
tax  withholdings  and  any  other  authorized  deductions  paid  within  thirty  (30)  days  of  you  returning  an  executed 
Agreement. Such payment is being made consistent with the terms of the Employment Letter Agreement dated November 
28,  2018  and  the  Amendment  to  the  the  Employment  Letter  Agreement,  dated  December  26,  2023  (collectively  the 
“Awad Employment Agreement”).

ii.

Health and Other Benefits.

a.

Health: You will have the right to continue your participation in Synlogic’s medical and dental insurance programs 
through your Separation Date. You will then have the right to continue your participation in Synlogic’s medical and 
dental  insurance  programs  subject  to  your  timely  applying  and  being  eligible  for  such  benefits  pursuant  to  the 
provisions of the Consolidated Omnibus Budget Reconciliation Act of 1985 (COBRA), subject to the requirements 
of COBRA and the continuation of the Company medical and dental plans by its insurance carrier. If you sign this 
Agreement and it becomes effective as set forth below, and elect COBRA coverage, the Company will continue to 
pay  the  Company  premium  for  such  coverage  for  six  (6)  months  after  your  Separation  Date.  Your  medical  and 
dental plan contributions will be deducted from your severance pay. Thereafter, your continuation of your medical 
and dental insurance pursuant to the provisions of COBRA will be solely at your own cost. The “qualifying event” 
under  COBRA  shall  be  deemed  to  have  commenced  on  the  Separation  Date.  In  the  event  that  the  Company,  in
connection  with  the  winding  down  of  its  business,  terminates  its  group  health  plan  coverage,  the  Company  shall 
provide  you  with  a  taxable  lump  sum  payment  equal  to  the  cost  of  the  currently  selected  medical  benefit  option 
times the number of months remaining in the severance period following cessation of the Company’s group health 
plan coverage.

1 Except for the obligations set forth in Section 2 which shall be solely the obligations of Synlogic, Inc.,whenever the term Synlogic, Inc. is otherwise used 
in this Agreement (including, without limitation, Section 7), it shall be deemed to include Synlogic, Inc., and any and all of its divisions, affiliates and 
subsidiaries and all related entities (including investors), and its and their directors, officers, employees, agents, successors and assigns.

b.

2024 Bonus: You will be eligible for consideration of 100% of your target 2024 bonus, pro-rated by the number of 
days employed in 2024, in the amount of $87,302. The determination of whether to 

 
 
 
 
 
award a bonus and the amount of such bonus shall be in the sole discretion of the Company and is subject to the 
approval of the Board of Directors. If such bonus is awarded,it is expected to be paid by no later than within thirty 
(30)  days  of  you  returning  an  executed  Agreement.  You  acknowledge  and  agree  that  you  have  no  contractual  or 
other entitlement to such a bonus.

ii.   You acknowledge and agree that the Severance Pay and Benefits set forth in the sub-sections above are consistent with the  
provisions of the Brennan Employment Agreement, and that your signing of this Agreement is a condition precedent to the receipt of such 
Severance Pay and Benefits.

Exhibit 10.22

3.

4.

Equity.  You  will  be  entitled  to  exercise  only  those  stock  options  or  RSAs  granted  to  you  and  which  are  vested  as  of  the
Separation Date under the applicable Synlogic, Inc. equity plans and any amendments to those plan (the “Equity Plans”), and 
only in accordance with the terms and conditions of the Equity Plans. You acknowledge and agree that you do not and will not in 
the future have rights to vest in any other equity plans (of whatever name or kind) that you participated in or were eligible to 
participate in during your employment with the Company.

Acknowledgements. You acknowledge and agree that the Severance Pay and Benefits to be provided to you are not intended to,
and shall not constitute, a severance plan and shall confer no benefit on anyone other than the Company and you. You further 
acknowledge that except for any unpaid regular wages (including accrued and unused vacation) earned through the Separation 
Date, which shall be paid on or around the Separation Date, you have been paid and provided all wages, vacation pay, holiday 
pay, bonus, business expenses, and any other form of compensation or benefit that may be due to you now or which would have 
become due in the future in connection with your employment or separation of employment with the Company.

5.

Return of Property, Confidentiality, Non-Disparagement. You expressly acknowledge and agree to the following:

i.

That  you  will  abide  by  any  and  all  obligations  contained  in  agreements  you  have  executed(copies  of  which  can  be 
provided  to  you),  the  terms  of  which  are  hereby  incorporated  by  reference,  which  shall  survive  the  signing  of  this 
Agreement, and which you hereby affirm. You further agree that you otherwise will keep all confidential information and 
trade secrets of the Company confidential, and that you will abide by any and all common law and/or statutory obligations 
relating  to  protection  and  non-disclosure  of  the  Company’s  trade  secrets  and/or  confidential  and  proprietary  documents 
and information. Consistent with applicable law, the Company is providing you with the notice of immunity set forth in 
Exhibit A,which is a part of this Agreement and each other agreement referenced in this subsection.

ii. Without limiting the foregoing obligations, that by your Separation Date, you will promptly return to the Company all the 
Company documents (and any copies) and property (including all electronically stored information) regardless of where 
such  documents,  information  or  property  is  maintained.  You  acknowledge  and  agree  that  you  shall  not  maintain  any 
copies or duplicates of such documents or information. You further acknowledge that if you were to use or disclose any of 
the information reflected in such items, that this would cause immediate, substantial and irreparable harm to the Company. 

iii.

iv.

That all information relating in any way to the negotiation and terms of this Agreement (except for your obligations under 
Section  5(i)  above),  including  the  amount  of  financial  consideration  provided  for  in  this  Agreement,  shall  be  held 
confidential by you and shall not be publicized or disclosed to any person (other than an immediate family member, legal 
counsel, or financial advisor, provided that any such individual to whom disclosure is made agrees to be bound by these 
confidentiality obligations), business entity, or as otherwise mandated by state or federal law.

That you will not make any oral or written statements (including on any social media or other similar platform) that are 
professionally  or  personally  disparaging  about,  or  adverse  to,  the  interests  of  the  Company(including  its  officers, 
directors,  employees  and  consultants)  including,  but  not  limited  to,  any  statements  that  disparage  any  person,product, 
service, finances,financial condition, capability or any other aspect of the business of the Company, and that you will not 
engage  in  any  conduct  which  could  reasonably  be  expected  to  harm  professionally  or  personally  the  reputation  of  the 
Company (including its officers, directors, employees and consultants).

 
Exhibit 10.22

v.

vi.

That the Severance Pay and Benefits being offered are based on your representations that you have not engaged in any 
fraudulent or unlawful conduct, and that you have fully disclosed to the Company all material information relating to your 
job duties for the Company.

You agree that in the event of your breach of any of your agreements set forth in this Section 5 the Company would suffer 
substantial  irreparable  harm  and  that  the  Company  would  not  have  an  adequate  remedy  at  law  for  such  breach.  In 
recognition of the foregoing, you agree that in the event of a breach or threatened breach of any of these covenants, in 
addition  to  such  other  remedies  as  the  Company  may  have  at  law,  without  posting  any  bond  or  security,  the  Company 
shall  be  entitled  to  seek  and  obtain  equitable  relief,  in  the  form  of  specific  performance,  or  temporary,  preliminary  or 
permanent injunctive relief, or any other equitable remedy which then maybe available. The seeking of such injunction or 
order shall not affect the Company’s right to seek and obtain damages or other equitable relief on account of any such 
actual or threatened breach. You further agree that the Company shall be entitled to its costs and fees, including attorneys’ 
fees, incurred by it should it prevail in enforcing and provision of this Agreement.

6.

Cooperation/Transition of Duties. You agree that during the Severance Period you will make yourself reasonably available to the 
Company,  upon  reasonable  notice,  either  by  email,  telephone  or,  if  the  Company  believes  necessary,  in  person  to  assist  the 
Company in any matter relating to the services performed by you during your employment with the Company including, but not 
limited, transitioning your duties to others at the Company. You further agree that during this period of time and thereafter you
will cooperate fully with the Company in the defense or prosecution of any claims or actions now in existence or which may be 
brought  or  threatened  in  the  future  against  or  on  behalf  of  the  Company,  including  any  claim  or  action  against  its  directors, 
officers and employees. Your cooperation in connection with such claims or actions shall include, your being available, within 
reason  given  the  constraints  of  future  employment  or  job  search  activities,  to  meet  with  the  Company  to  prepare  for  any 
proceeding, to provide truthful affidavits and/or testimony, to assist with any audit, inspection, proceeding or other inquiry, and 
to  act  as  a  witness  in  connection  with  any  litigation  or  other  legal  proceeding  affecting  the  Company.  You  further  agree  that 
should  an  individual  representing  a  party  adverse  to  the  business  or  legal  interests  of  the  Company  (including,  without 
limitation,  anyone  threatening  any  form  of  legal  action  against  the  Company)  contact  you  (directly  or  indirectly),  you  will 
promptly (within 48 hours) inform the Company of that fact. Nothing herein shall be construed to prohibit or prevent you from 
cooperating with any government investigation (including maintaining the confidentiality of such investigation if required by the 
government), nor shall any such cooperation be deemed to be a violation of your obligations of non-disparagement set forth in 
Section 5(iv) above.

7.

Release of Claims. You hereby acknowledge and agree that by signing this Agreement, you are waiving your right to assert any 
Claim (as defined below) against Synlogic arising from acts or omissions that occurred on or before the Separation Date or the 
Effective Date, whichever is later. Please note definition of Synlogic contained in footnote 1 of this Agreement. 

Your  waiver  and  release  is  intended  to  bar  any  form  of  legal  claim,lawsuit,  charge,  complaint  or  any  other  form  of 
action  (jointly  referred  to  as  “Claims”)  against  the  Company  seeking  money  or  any  other  form  of  relief,  including  but  not 
limited  to  equitable  relief  (whether  declaratory,  injunctive  or  otherwise),  damages  or  any  other  form  of  monetary  recovery 
(including  but  not  limited  to  back  pay,  front  pay,  compensatory  damages,  emotional  distress  damages,  punitive  damages, 
attorneys’ fees and any other costs). You understand that there could be unknown or unanticipated Claims resulting from your 
employment with the Company and the termination of your employment, and you agree that such Claims are included in this 
waiver  and  release.  You  specifically  waive  and  release  the  Company  from  any  Claims  arising  from  or  related  to  your 
employment relationship with the Company or the termination of your employment, including without limitation Claims under 
any statute, ordinance, regulation, executive order, common law, constitution and/or other source of law of any state, country 
and/or  locality  (collectively  and  individually  referred  to  as  “Law”),  including  but  not  limited  to  the  United  States,  the 
Commonwealth of Massachusetts, and/or any other state or locality where you worked for the Company. 

Without  limiting  the  foregoing  general  waiver  and  release,  except  for  Claims  resulting  from  the  failure  of  the 

Company to perform its obligations under this Agreement, you specifically waive and release the 

 
Exhibit 10.22

Company  from  any  Claims  arising  from  or  related  to  your  employment  relationship  with  the  Company  or  the  termination 
thereof, including without limitation:

i.

ii.

iii.

iv.

v.

Claims under any Law concerning discrimination, harassment, retaliation, or other fair employment practices, including, 
but not limited to the Massachusetts Anti-Discrimination and Anti-Harassment Law (M.G.L. c. 151B), the Massachusetts 
Sexual  Harassment  Law  (M.G.L.  c.  214,  §  1C),  the  Massachusetts  Equal  Pay  Act  (M.G.L.  c.  149,  §  105A),  the 
Massachusetts Civil Rights Act (M.G.L. c. 12, §§ 11H, 11I), the Massachusetts Equal Rights Act (M.G.L. c. 93, §§ 102, 
103), the Age Discrimination in Employment Act (29 U.S.C. § 621 et seq.), Title VII of the Civil Rights Act of 1964 (42 
U.S.C.  §  2000e  et  seq.),  42  U.S.C.  §  1981,  the  Civil  Rights  Act  of  1991,  Section1981  of  the  U.S.C.  Title  42,  the 
Americans with Disabilities Act (42 U.S.C. § 12101 et seq.), the Occupational Safety and Health Act, 29 U.S.C. §651 et 
seq. each as they may have been amended through the Separation Date or the Effective Date, whichever is later.

Claims under any Law relating to wages, hours, whistle blowing, leaves of absences or any other terms and conditions of 
employment,  including  but  not  limited  to  the  Family  and  Medical  Leave  Act  of  1993  (29  U.S.C.  §  2601  et  seq.),  the 
Emergency Family and Medical Leave Expansion Act (Pub. L. No. 116-127, § 3101, 134 Stat. 178, 189); the Emergency 
Paid Sick Leave Act (Pub. L. No. 116-127, § 5101, 134 Stat. 178, 195), the Employee Retirement Income Security Act 
(ERISA), the Fair Labor Standards Act, the Worker Adjustment and Retraining Notification (WARN) Act, the National 
Labor  Relations  Act  (NLRA),  the  American  Rescue  Plan  Act  of  2021,  the  Massachusetts  Payment  of  Wages  Law 
(Massachusetts  General  Laws  Chapter  149,  §§  148,  150),  Massachusetts  General  Laws  Chapter  149  in  its  entirety, 
Massachusetts  General  Laws  Chapter  151  in  its  entirety  (including  but  not  limited  to  the  minimum  wage  and  overtime 
provisions),  the  Massachusetts  Paid  Family  Medical  Leave  Act  (M.G.L.c.  175M  et seq.),  each  as  they  may  have  been 
amended through the Separation Date or the Effective Date, whichever is later. You specifically acknowledge that you are 
waiving any Claims for unpaid wages under these and other Laws.

Claims  under  any  local,  state  or  federal  common  law  theory  including,  without  limitation,  any  Claim  for  breach  of 
contract,  ownership  of  inventions  or  any  other  intellectual  property,  implied  contract,  misrepresentation  (intentional  or 
negligent),  fraud,  promissory  estoppel,unjust  enrichment,  quantum  meruit,  defamation  (libel  or  slander),or  any  other 
Claim sounding in contract or tort.

Claims arising under the Company’s policies or benefit plans.

Claims arising under any other Law or constitution.

Notwithstanding the foregoing, this Section shall not release Synlogic from any obligation expressly set forth in this 
Agreement.  You  acknowledge  and  agree  that,  but  for  providing  this  waiver  and  release,  you  would  not  be  receiving  the 
Severance Pay and Benefits provided for in this Agreement.

8.

OWBPA. Because you are at least forty (40) years of age, you have specific rights under the federal Age Discrimination in 
Employment Act (“ADEA”) and Older Workers Benefit Protection Act (“OWBPA”), which prohibit discrimination on the basis 
of age. The release in Section 7 is intended to release any Claim you may have against Synlogic alleging discrimination on the 
basis of age under the ADEA, OWBPA,and other Laws. Notwithstanding anything to the contrary in this Agreement, the release 
in Section 7 does not cover rights or Claims under the ADEA that arise after the date you sign this Agreement or the Effective 
Date, whichever is later.

Further, it is the Company’s desire and intent to make certain that you fully understand the provisions and effects of 
this  Agreement.  To  that  end,  the  Company  hereby  advises  you  in  writing  to  consult  with  legal  counsel  prior  to  signing  this 
Agreement for the purpose of reviewing the terms of this Agreement. Also, because you are at least age 40, and consistent with 
the  provisions  of  the  OWBPA,you  are  being  provided  with  certain  information,  in  the  chart  attached  as  Exhibit  B  to  this 
Agreement,  pertaining  to  the  ages  and  job  titles  of  employees  in  the  same  decisional  unit  who  are  affected  and  who  are  not 
affected  by  the  reduction  in  force  that  is  resulting  in  the  termination  of  your  employment.  In  addition,  consistent  with  the 
provisions of the OWBPA, the Company is providing you with over forty-five (45) days from the date you are provided this 
Agreement to consider and accept the terms of this Agreement by signing below and returning it to Mary Beth Dooley, Head of 
Finance at marybeth@synlogictx.comor returning it to Synlogic, 301 Binney St, Cambridge, MA 02142 c/o 

 
 
Exhibit 10.22

Mary Beth Dooley, Head of Finance, and notifying Mary Beth Dooley by email that it has been sent by hard copy. You further 
agree that any changes to this Agreement will not restart the running of this 45-day period. In addition, you may rescind your 
assent to this Agreement if, within seven(7) days after you sign this Agreement, you deliver a notice of rescission to Synlogic. 
To be effective, such rescission must be hand delivered or postmarked within the seven (7) day period and sent by certified mail, 
return receipt requested, to Mary Beth Dooley at Synlogic at the above referenced address.

Also, consistent with the provisions of state and federal discrimination laws (the “Discrimination Laws”), nothing in 
the general waiver and release set forth in Section 7 above shall be deemed to prohibit you from challenging the validity of this 
release under the Discrimination Laws or from filing a charge or complaint of age or other related discrimination with the Equal 
Employment  Opportunity  Commission  (“EEOC”)  or  similar  state  agency,  or  from  participating  in  any  investigation  or 
proceeding conducted by the EEOC or such state agency. However, the release in Section 7 does prohibit you from seeking or 
receiving monetary damages or other individual-specific relief in connection with any such charge or complaint of age or other 
work-related  discrimination.  Further,  nothing  in  this  Agreement  shall  be  deemed  to  limit  Synlogic’s  right  to  seek  immediate 
dismissal  of  such  charge  or  complaint  on  the  basis  that  your  signing  of  this  Agreement  constitutes  a  full  release  of  any 
individual  rights  under  the  Discrimination  Laws,  or  Synlogic’s  right  to  seek  restitution  or  other  legal  remedies  to  the  extent 
permitted by law of the economic benefits provided to you under this Agreement in the event that you successfully challenge 
the validity of this release and prevail in any claim under the Discrimination Laws.

9.

Consequences  of  Breach.  In  addition  to  any  other  remedies  set  forth  in  this  Agreement,  a  breach  by  you  of  any  of  your 
obligations set forth in this Agreement shall constitute a material breach of this Agreement and, in addition to any other legal or 
equitable remedy available to Synlogic, shall entitle Synlogic to cease any further payment of the Severance Pay and Benefits, 
and to recover any Severance Pay or Benefits or its support for other benefits already provided to you. Regardless of any such 
breach, your release set forth in Section 7 above shall remain in full force and effect.

10.

Entire Agreement/Choice of Law/Enforceability/Jury Waiver/Successors and Assigns.

i.

ii.

iii.

iv.

Except as otherwise expressly provided in this Agreement, this Agreement supersedes any and all other prior oral and/or 
written agreements and sets forth the entire agreement between you and Synlogic. No variations or modifications hereof 
shall be deemed valid unless reduced to writing and signed by the parties hereto.

This Agreement shall be governed by the law of the state where you reside on the date you sign this Agreement, without 
giving effect to conflict of law principles.

Both parties further agree that any action, demand, claim or counterclaim relating to this Agreement shall be resolved by a 
judge alone, and both parties hereby waive and forever renounce the right to a trial before a civil jury.

If your release of Claims pursuant to Section 7 is determined to be unenforceable in whole or part, the Company will have 
the option, in its sole discretion, to either (a) declare the entire Agreement null and void and require you to refund the 
Severance Pay and Benefits provided for in this Agreement; or (b) enforce the portions of the Agreement found not to be 
unenforceable. In the event that any other provision of this Agreement is determined to be unenforceable in whole or part, 
the remainder of the Agreement shall be enforced in full.

v.

This Agreement shall inure to the benefit of Synlogic and any of its successors and assigns.

It is Synlogic’s desire and intent to make certain that you fully understand the provisions and effects of this Agreement. By 
executing this Agreement, you are acknowledging (a) that you have been afforded sufficient time to understand the terms and effects 
of  this  Agreement  and  to  consult  with  legal  counsel,  (b)  that  your  agreements  and  obligations  hereunder  are  made  voluntarily, 
knowingly  and  without  duress,  and  (c)  that  neither  Synlogic  nor  its  agents  or  representatives  have  made  any  representations 
inconsistent with the provisions of this Agreement.

 
 
 
If you agree to the terms of this Agreement, please sign and return the enclosed copy of this Agreement by no later than April 1, 

Exhibit 10.22

2024.

Very truly yours,

Synlogic, Inc. 

 /s/ Aoife Brennan   
By: Aoife Brennan. CEO 
Dated: 2/16/2024  

Accepted and Agreed To:
/s/ Tony Awad

Dated: 2/17/2024

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.23

Effective Date: March 1, 2024

Tony Awad

Re:   

Retention Agreement

Dear Tony:

In recognition of your value and expected contributions to Synlogic, Inc. (“the Company”) we are pleased to offer you 

the following Retention Bonus Agreement (the “Agreement”). 

Retention Bonus Amount and Eligibility Conditions

If you (a) remain employed by the Company and continue to provide services at a satisfactory level through May 30, 2024 
(the “Termination Date”) and (b) meet the remaining conditions of this paragraph, then you will receive a Retention Bonus in the 
amount of 75% of your base salary for each month worked on a pro rata basis, paid as a lump sum within thirty (30) days of your 
Termination  Date.  If  you  terminate  your  employment  for  any  reason  prior  to  May  30,  2024  or  the  Company  terminates  your 
employment for cause, then you shall not be eligible for the Retention Bonus. This bonus will be subject to all federal, state, city 
or other tax withholdings.

Additional Terms

Nothing  in  this  letter  supersedes  or  in  any  way  modifies  any  existing  agreement(s)  between  you  and  the  Company 
including, without limitation, any separation agreement, agreements concerning inventions assignment, protection of confidential 
information or trade secrets, non-solicitation of customers, clients, business or employee. This Retention Bonus is not intended 
and shall not be deemed a “wage” under any federal or state wage-hour law.    

You acknowledge that payment of the Retention Bonus is not part of normal or expected compensation for purposes of 
calculating  any  severance,  resignation,  redundancy,  end  of  service  payments,  bonuses,  long-service  awards,  pension  or 
retirement benefits, matching contributions or similar payments.

The  validity,  interpretation  and  performance  of  this  Agreement  shall,  in  all  respects,  be  governed  by  the  laws  of  the 
Commonwealth  of  Massachusetts.  No  provision  of  this  Agreement  may  be  modified,  altered  or  amended,  except  in  a  writing 
signed by both you and an authorized Officer of the Company. The Company may assign or delegate this Agreement or any of 
its rights or obligations hereunder to a person or entity that is an affiliate of or successor to the Company.

On  behalf  of  Synlogic,  I  want  to  thank  you  in  advance  for  your  efforts  in  helping  the  Company.  Please  confirm  your 
understanding and agreement to the terms and conditions of this Agreement by signing and returning the enclosed copy of this 
letter.  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Sincerely, 

SYNLOGIC, INC.

By: 

/s/ Peter Barrett 

Name:  Peter Barrett

Title:   Chair

Accepted and Approved:

/s/ Tony Awad   

Name: Tony Awad

Date:  3/7/2024 

 
 
 
 
                         
 
 
   
 
 
 
 
Exhibit 10.24

Synlogic, Inc.
301 Binney Street, Suite 402
Cambridge, MA 02142

REVISED
April 5, 2018

Mary Beth Dooley
 ____________
____________

Re:  Employment Letter Agreement

Dear Mary Beth,

I  am  delighted  to  provide  you  with  the  terms  and  conditions  of  your  employment  by  Synlogic,  Inc.,  a  Delaware 
corporation  (the  “Company”).  We  were  all  very  impressed  with  your  candidacy  and  think  you  would  make  an  excellent 
addition to our team.

1.Position.  Your  initial  position  will  be  Associate  Director,  Financial  Analyst  at  the  Associate  Director  level.  In 
addition to performing duties and responsibilities associated with your position, from time to time the Company may assign 
you  other  duties  and  responsibilities  consistent  with  such  position.  Your  principal  place  of  employment  will  be  at  the 
Company’s corporate offices in Cambridge, Massachusetts.

2.Response  and  Start  Date.  This  offer  of  employment  will  expire  within  5  business  days.  Please  do  not  hesitate  to 

contact me if you have any questions about these terms and conditions, or if I can provide any further information.

It is expected that your employment will start on June 4, 2018 or such other later date as you and the Company may 

mutually agree (the “Start Date”).

3.Nature of Relationship; Status.

(a)You  are  employed  at  will.  No  provision  of  this  Agreement  will  be  construed  to  create  an  express  or  implied 
employment contract for a specific period of time. Either you or the Company may terminate the employment relationship at 
any time and for any reason upon written notice to the other party as set forth herein.

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(b)You will be expected to devote the necessary full time business time and energies to the business and affairs of the 
Company in order to perform your duties. You will perform the foregoing services at the principal office of the Company, or at 
any other location mutually agreed upon by you and the Company.

4.Compensation.

(a)Base  Salary.  Your  initial  base  salary  will  be  at  the  rate  of  $150,000  per  annum,  which  will  be  prorated  for  any 

partial year, month or week.

(b)Expenses. You will be entitled to reimbursement for all ordinary and reasonable out-of-pocket business expenses 
that  are  reasonably  incurred  by  you  in  furtherance  of  the  Company’s  business,  following  submission  of  reasonably  detailed 
receipts.

(b)Bonus  Opportunity.  Your  bonus  target  is  fifteen  percent  (15%).  Bonus  payments  are  completely  discretionary. 
Under the currently approved Synlogic Non-Executive Bonus Program payouts typically range from 0 – 150% of target based 
on  the  achievement  of,  or  progress  toward,  individual,  departmental  and/or  corporate  objectives  and  goals,  as  reasonably 
determined by the Board of Directors (the “Board”). The Bonus Program can be reviewed at any time at the discretion of the 
Board. We aim to pay for performance and strive for transparency in our compensation programs. It is therefore important to 
note that typically an individual, or the company or both will have to exceed some or most goals for an employee to receive a 
payout at, or above, the target percentage.

To be eligible for any such bonus for a given Fiscal Year, your Start Date must be before November 1 in that 
Fiscal Year and you must be employed by the Company in good standing at the time such bonus is awarded. The bonus, if any, 
will be pro-rated from the Start Date.

(c)Equity. Subject to the terms of the Company’s then applicable equity incentive plan (“Incentive Plan”) and form of 
option agreement, and subject to approval by the Board of Directors of the Company, you will be granted an option to purchase 
an  aggregate  of  five  thousand  (5,000)  shares  of  the  Common  Stock  on  the  date  of  the  grant,  intended  to  qualify  as  an 
“incentive stock option” to the to the maximum extent allowed under Section 422 of the Internal Revenue Code. The option 
will vest as to one-fourth (1/4th) of the shares on the first anniversary of the Start Date, and the remainder will vest one-forty-
eighth (1/48th) per month thereafter. All tax consequences resulting from the grant, vesting, or exercise of the option to or by 
you, or from the disposition by you of such shares of Common Stock, will be your responsibility.

(d)Sign-on Bonus: Sign-On: You will be entitled to receive a separate sign-on bonus of twenty thousand ($20,000). 
The  sign-on  bonus  will  be  payable  within  two  payroll  cycles  after  your  start  date.  You  will  be  required  to  repay  any  such 
sign-on  bonuses  in  full  within  30  days  if  your  employment  is  terminated  within  24  months  of  your  date  of  hire  by  the 
Company for Cause or by you for any reason.

4.Benefits.

2

 
 
 
 
 
 
 
 
 
 
 
(a)Vacation.  You  will  be  eligible  for  three  (3)  weeks  paid  vacation  on  top  of  the  standard  Massachusetts  holidays. 
Vacation eligibility will accrue at a rate of ten (10) hours per month of service, and up to five (5) unused vacation days may be 
carried over from one year to the next year.

(b)Benefits. You will be eligible to participate in the benefits provided by the Company to its employees. Please note 
that where any particular benefit is governed by a formal plan document, your eligibility and coverage will be determined by 
such  document,  and  the  Company  may  change  its  benefit  offerings  from  time  to  time  in  its  discretion  to  meet  its  business 
needs. The Company retains the right to change, add or cease any particular benefit.

5.Confidentiality,  Inventions  and  Non-Competition.  The  Company  considers  the  protection  of  its  confidential 
information  and  proprietary  materials  to  be  very  important.  Therefore,  as  a  condition  of  your  employment,  you  and  the 
Company  will  become  parties  to  a  Non-  Solicitation,  Invention  and  Non-Disclosure  Agreement  substantially  in  the  form  of 
Attachment A- 1 to this letter (the “Related Agreement”).

6.Use  of  Name  or  Likeness.  You  hereby  authorize  the  Company  to  use,  publish,  and  copyright  all  or  part  of  my 
name,  voice,  picture,  portrait,  and  likeness  as  the  Company  may  decide  in  its  sole  discretion,  in  all  media  and  types  of 
advertising for any product or service or for any other lawful purpose, without review by me.

7.General.

(a)Entire Agreement. This letter, together with the Related Agreement, will constitute our entire agreement as to your 
employment  by  or  consultancy  for  the  Company  and  will  supersede  any  prior  agreements  or  understandings,  whether  in 
writing or oral.

(b)Notices. All notices, requests, consents and other communications hereunder will be in writing, will be addressed 
to the receiving party’s address set forth above or to such other address as a party may designate by notice hereunder, and will 
be  either  (i)  delivered  by  hand,  (ii)  sent  by  overnight  courier,  (iii)  sent  by  registered  mail,  return  receipt  requested,  postage 
prepaid  (iv)  sent  by  facsimile,  electronic  mail  or  electronic  PDF  transmission,  in  each  case  with  confirmation  retained.  All 
notices, requests, consents and other communications hereunder will be deemed to have been given either (i) if by hand, at the 
time of the delivery thereof to the receiving party at the address of such party set forth above, (ii) if sent by overnight courier, 
on the next business day following the day such notice is delivered to the courier service, (iii) if sent by registered mail, on the 
fifth  business  day  following  the  day  such  mailing  is  made  or  (iv)  when  confirmation  is  received,  if  sent  by  facsimile  or 
electronic transmission.

(c)Modifications or Amendments. The terms and provisions of this letter may be modified or amended only by written 

agreement executed by the parties hereto.

(d)Waivers  and  Consents.  The  terms  and  provisions  of  this  letter  may  be  waived,  or  consent  for  the  departure 

therefrom granted, only by written document executed by the party

3

 
 
 
 
 
 
 
 
 
 
 
 
entitled to the benefits of such terms or provisions. No such waiver or consent will be deemed to be or will constitute a waiver 
or consent with respect to any other terms or provisions of this letter, whether or not similar. Each such waiver or consent will 
be effective only in the specific instance and for the purpose for which it was given, and will not constitute a continuing waiver 
or consent.

(e)Assignment. The Company may assign its rights and obligations hereunder to any person or entity that succeeds to 
all  or  substantially  all  of  the  Company’s  business  or  that  aspect  of  the  Company’s  business  in  which  you  are  principally 
involved. You may not assign your rights and obligations under this letter without the prior written consent of the Company 
and any such attempted assignment by you without the prior written consent of the Company will be void.

(f)Benefit. All statements, representations, warranties, covenants and agreements in this letter will be binding on the 
parties hereto and will inure to the benefit of the respective successors and permitted assigns of each party hereto. Nothing in 
this letter will be construed to create any rights or obligations except between the Company and you, and no person or entity
other than the Company will be regarded as a third party beneficiary of this letter.

(g)Governing Law. This letter and the rights and obligations of the parties hereunder will be construed in accordance 
with  and  governed  by  the  internal  law  of  the  Commonwealth  of  Massachusetts,  without  giving  effect  to  the  conflict  of  law 
principles thereof.

(h)Jurisdiction;  Venue  and  Service  of  Process.  Any  legal  action  or  proceeding  with  respect  to  this  letter  will  be 
brought  in  the  courts  of  the  Commonwealth  of  Massachusetts  (or,  if  appropriate,  a  federal  court  located  within  the 
Commonwealth of Massachusetts). By execution and delivery of this letter, each of the parties hereto accepts for itself and in 
respect of its property, generally and unconditionally, the exclusive jurisdiction of the aforesaid courts.

(i)WAIVER OF JURY TRIAL. ANY ACTION, DEMAND, CLAIM OR COUNTERCLAIM ARISING UNDER OR 
RELATING  TO  THIS  AGREEMENT  WILL  BE  RESOLVED  BY  A  JUDGE  ALONE  AND  EACH  OF  THE  COMPANY 
AND YOU WAIVE ANY RIGHT TO A JURY TRIAL THEREOF.

(j)Counterparts. This letter may be executed in two or more counterparts, and by different parties hereto on separate 

counterparts, each of which will be deemed an original, but all of which together will constitute one and the same instrument.

4

[remainder of page intentionally left blank]

 
 
 
 
 
 
 
 
 
You  may  accept  this  offer  of  employment  and  the  terms  and  conditions  thereof  by  signing  the  enclosed  additional 
copy of this letter and the Related Agreement, which execution will evidence your agreement with the terms and conditions set 
forth herein and therein, and returning them to the Company.

Sincerely, SYNLOGIC, INC.
By:  /s/ Adam J. Thomas 
Name: Adam J. Thomas
   Title:  Chief Human Resources Officer

Accepted and Approved:

/s/ Mary Beth Dooley 
Name: Mary Beth Dooley

Date: 4/11/2018

5

 
 
 
 
 
 
 
 
 
 
 
 
 
Exhibit 10.25

Effective Date: March 1, 2024

Mary Beth Dooley

Re:   

Retention Agreement

Dear Mary Beth:

In recognition of your value and expected contributions to Synlogic, Inc. (“the Company”) we are pleased to offer you 

the following Retention Bonus Agreement (the “Agreement”). 

Retention Bonus Amount and Eligibility Conditions

If you (a) remain employed by the Company and continue to provide services at a satisfactory level through June 30, 2024 
(the “Termination Date”) and (b) meet the remaining conditions of this paragraph, then you will receive a Retention Bonus in the 
amount of 75% of your base salary for each month worked on a pro rata basis, paid as a lump sum within thirty (30) days of your 
Termination  Date.  If  you  terminate  your  employment  for  any  reason  prior  to  June  30,  2024  or  the  Company  terminates  your 
employment for cause, then you shall not be eligible for the Retention Bonus. This bonus will be subject to all federal, state, city 
or other tax withholdings.

Additional Terms

Nothing  in  this  letter  supersedes  or  in  any  way  modifies  any  existing  agreement(s)  between  you  and  the  Company 
including, without limitation, any separation agreement, agreements concerning inventions assignment, protection of confidential 
information or trade secrets, non-solicitation of customers, clients, business or employee. This Retention Bonus is not intended 
and shall not be deemed a “wage” under any federal or state wage-hour law.    

You acknowledge that payment of the Retention Bonus is not part of normal or expected compensation for purposes of 
calculating  any  severance,  resignation,  redundancy,  end  of  service  payments,  bonuses,  long-service  awards,  pension  or 
retirement benefits, matching contributions or similar payments.

The  validity,  interpretation  and  performance  of  this  Agreement  shall,  in  all  respects,  be  governed  by  the  laws  of  the 
Commonwealth  of  Massachusetts.  No  provision  of  this  Agreement  may  be  modified,  altered  or  amended,  except  in  a  writing 
signed by both you and an authorized Officer of the Company. The Company may assign or delegate this Agreement or any of 
its rights or obligations hereunder to a person or entity that is an affiliate of or successor to the Company.

On  behalf  of  Synlogic,  I  want  to  thank  you  in  advance  for  your  efforts  in  helping  the  Company.  Please  confirm  your 
understanding and agreement to the terms and conditions of this Agreement by signing and returning the enclosed copy of this 
letter.  

 
 
 
 
 
 
 
 
 
 
 
 
 
 
Sincerely, 

SYNLOGIC, INC.

By: 

/s/ Peter Barrett 

Name:  Peter Barrett

Title:   Chair

Accepted and Approved:

/s/ Mary Beth Dooley 

Name: Mary Beth Dooley

Date:  3/7/2024 

 
 
 
 
                         
 
 
   
 
 
 
 
 
[***] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED BY 
BRACKETS, HAS BEEN OMITTED BECAUSE THE INFORMATION (I) IS NOT MATERIAL AND (II) 
WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY DISCLOSED.

Exhibit 10.40

To: Synlogic OperatingCompany, Inc. CR3 License Fee, SOW P-10558-01
From: Azzur Cleanrooms on Demand, Waltham
Re: Addendum to Scope of Work for Cleanroom 3 Use, SOW P-10558-01

Synlogic Operating Company, Inc. (“Synlogic”) has notified Azzur Cleanrooms on Demand (“Azzur”) that it shall be exercising its First and 
Second Option to extend its use of Azzur facilities until December 31, 2024. The purpose of this addendum is to outline the 2024 License fee 
term  for  Synlogic  Operating  Company,  Inc.  and  to  confirm  that  the  Addendum  includes  additional  Ambient  storage,  Personnel  hours  and 
BSC sampling once a week. All other terms remain the same. 

Please refer to Table 1 for additional information 

Table 1: License Fee 2024

Table 1: 2024 License Fee Costs

  Item Description

  [***]
  [***]
  [***]
  [***]
  [***]
  [***]
  [***]

  [***]
  [***]
  [***]

Total License Fee

  SOW Accepted by
  Azzur Cleanrooms On Demand
  Dan Dernbach
  Vice president of Operations
  Email: Daniel.dernbach@azzur.com
  SynlogicOperating Company, Inc 
  Tony Awad, COO
  Email: tony.awad@synlogictx.com

  # of 
  Units/
  month

  [***]
  [***]
  [***]
  [***]
  [***]
  [***]
  [***]

  [***]
  [***]
  [***]

2024 Monthly Costs

2024 Yearly Costs

[***]
[***]
[***]
[***]
[***]
[***]
[***]

[***]
[***]
[***]

[***]

[***]
[***]
[***]
[***]
[***]
[***]
[***]

[***]
[***]
[***]

[***]

Signature

  /s/ Daniel Dernbach

Date
12/8/2023

  /s/ Tony Awad

12/4/2023

 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SUBSIDIARIES OF SYNLOGIC, INC.

Subsidiary

Synlogic Operating Company, Inc.
Synlogic Securities Corporation

Jurisdiction

Delaware
Massachusetts

Exhibit 21.1

 
 
 
 
 
 
Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statements (Nos. 333-207299, 333-210466, 333-220841, 333-223798, 333-
230224, 333-237104, 333-237105, 333-254688, 333-254689, 333-263629, 333-263630, 333-270925, and 333-270926) on Form S-8 and 
(Nos. 333-233139 and 333-258151) on Form S-3 of our report dated March 19, 2024, with respect to the consolidated financial statements of 
Synlogic, Inc.

Exhibit 23.1

Boston, Massachusetts
March 19, 2024

/s/ KPMG LLP

 
 
 
 
 
 
 
Exhibit 31.1

I, Antoine Awad, certify that:

1.  I have reviewed this annual report on Form 10-K of Synlogic, Inc.;

CERTIFICATIONS UNDER SECTION 302

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(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as 

defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 
15d-15(f)) for the registrant and have:

a)  designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to 

ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, 
particularly during the period in which this report is being prepared;

b)  designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our 

supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes 
in accordance with generally accepted accounting principles;

c)  evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the 

effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and 

d)  disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent 

fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, 
the registrant's internal control over financial reporting; and 

5.  The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial 
reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)  all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are 

reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)  any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal 

control over financial reporting.

Date: March 19, 2024

By:

/s/ ANTOINE AWAD
Antoine Awad
Principal Executive Officer 
(principal executive officer)

 
 
 
 
 
 
 
 
 
Exhibit 31.2

I, Mary Beth Dooley, certify that:

1.  I have reviewed this annual report on Form 10-K of Synlogic, Inc.;

CERTIFICATIONS UNDER SECTION 302

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(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as 

defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 
15d-15(f)) for the registrant and have:

a)  designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to 

ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, 
particularly during the period in which this report is being prepared;

b)  designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our 

supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes 
in accordance with generally accepted accounting principles;

c)  evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the 

effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and 

d)  disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent 

fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, 
the registrant's internal control over financial reporting; and 

5.  The registrant’s other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial 
reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a)  all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are 

reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b)  any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal 

control over financial reporting.

Date: March 19, 2024

By:

/s/ MARY BETH DOOLEY
Mary Beth Dooley
 Head of Finance
(principal financial officer and principal 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 Synlogic, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2023 as filed with the 
Securities and Exchange Commission on the date hereof (the “Report”), I, Antoine Awad, Principal 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:

(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 19, 2024

By:

/s/ ANTOINE AWAD
Antoine Awad
Principal Executive Officer 
(principal executive officer)

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished 
to the Securities and Exchange Commission or its staff upon request.

 
 
 
 
 
 
 
 
 
 
 
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 Synlogic, Inc. (the “Company”) on Form 10-K for the period ending December 31, 2023 as filed with the 
Securities and Exchange Commission on the date hereof (the “Report”), I, Mary Beth Dooley, Head of Finance, certify, pursuant to 18 U.S.C. § 1350, as 
adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(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 19, 2024

By:

/s/ MARY BETH DOOLEY
Mary Beth Dooley
 Head of Finance
(principal financial officer and principal accounting officer)

A signed original of this written statement required by Section 906 has been provided to the Company and will be retained by the Company and furnished 
to the Securities and Exchange Commission or its staff upon request.