Quarterlytics / Healthcare / Biotechnology / Seres Therapeutics, Inc.

Seres Therapeutics, Inc.

mcrb · NASDAQ Healthcare
Claim this profile
Ticker mcrb
Exchange NASDAQ
Sector Healthcare
Industry Biotechnology
Employees 103
← All annual reports
FY2021 Annual Report · Seres Therapeutics, Inc.
Sign in to download
Loading PDF…
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 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, 2021  
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: 001-37465

Seres Therapeutics, Inc.

(Exact Name of Registrant as Specified in Its Charter)

27-4326290
(IRS Employer
Identification No.)

02139
(Zip Code)

(617) 945-9626
(Registrant’s Telephone Number, Including Area Code)
Securities registered pursuant to Section 12(b) of the Act:
Trading Symbol(s)
MCRB

  Name of each exchange on which registered

The Nasdaq Global Select Market

Delaware
(State or Other Jurisdiction of
Incorporation or Organization)

200 Sidney Street – 4  Floor
Cambridge, Massachusetts
(Address of Principal Executive Offices)

th

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

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 Section 15(d) of the Act.    Yes  ☐    No  ☒
Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months 

(or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this 

chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See 

the definitions of the "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 

☒  

☐  

☐  

Accelerated filer

Smaller reporting 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.        ☒ 

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ☐    No  ☒
The aggregate market value of the voting and non-voting common stock held by non-affiliates of the registrant based on the closing price of the registrant’s common stock as reported on 

the Nasdaq Global Select Market on June 30, 2021, was $1,645,330,768. Solely for purposes of this disclosure, shares of common stock held by executive officers, directors and certain 
stockholders of the registrant as of such date have been excluded because such holders may be deemed to be affiliates.

As of February 24, 2022, there were 92,014,368 shares of the registrant’s common stock, par value $0.001 per share, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant’s definitive Proxy Statement relating to its 2022 Annual Meeting of Stockholders to be filed with the SEC within 120 days after the end of the fiscal year ended 

December 31, 2021 are incorporated herein by reference in Part III.

 
 
 
 
 
  
  
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
PART I.
Item 1.
Item 1A.
Item 1B.
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.

SIGNATURES

TABLE OF CONTENTS

   Business
   Risk Factors
   Unresolved Staff Comments
   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 Accountant Fees and Services

   Exhibits and Financial Statement Schedules
  Form 10-K Summary

2

Page

5
36
73
73
74
74

75
76
77
95
95
95
95
96
96

97
100
100
100
100

101
103

104

 
  
  
  
 
  
  
 
     
 
  
  
 
     
 
  
  
 
     
 
  
  
 
 
FORWARD-LOOKING STATEMENTS

This Annual Report on Form 10-K contains forward-looking statements. We intend such forward-looking statements to be covered by the safe 

harbor provisions for forward-looking statements contained in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities 
Exchange Act of 1934, as amended. All statements other than statements of historical facts contained in this Annual Report on Form 10-K, including 
without limitation statements regarding our future results of operations and financial position, business strategy, prospective products, product approvals, 
research and development costs, timing and likelihood of success, manufacturing activities and related timing, commercialization efforts, plans and 
objectives of management for future operations and future results of anticipated products, are forward-looking statements. These statements involve known 
and unknown risks, uncertainties and other important 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 the forward-looking statements.

In some cases, you can identify forward-looking statements by terms such as “may,” “will,” “should,” “expect,” “plan,” “anticipate,” “could,” 
“intend,” “target,” “project,” “contemplate,” “believe,” “estimate,” “predict,” “potential” or “continue” or the negative of these terms or other similar 
expressions. The forward-looking statements in this Annual Report on Form 10-K are only predictions. We have based these forward-looking statements 
largely on our current expectations and projections about future events and financial trends that we believe may affect our business, financial condition and 
results of operations. These forward-looking statements speak only as of the date of this report and are subject to a number of important factors that could 
cause actual results to differ materially from those in the forward-looking statements, including the risks, uncertainties and assumptions described under the 
sections in this report titled “Summary Risk Factors,” “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of 
Operations” and elsewhere in this Annual Report on Form 10-K.

Moreover, we operate in an evolving environment. New risk factors and uncertainties may emerge from time to time, and it is not possible for 

management to predict all risk factors and uncertainties. 

You should read this Annual Report on Form 10-K and the documents that we reference in this Annual Report on Form 10-K completely and with 

the understanding that our actual future results may be materially different from what we expect. We qualify all of our forward-looking statements by these 
cautionary statements. Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, 
whether as a result of any new information, future events, changed circumstances or otherwise.

TRADEMARKS, SERVICE MARKS AND TRADENAMES

We have proprietary rights to trademarks used in this Annual Report on Form 10-K, which are important to our business and many of which are 
registered under applicable intellectual property laws. Solely for convenience, the trademarks, service marks, logos and trade names referred to in this 
Annual Report on Form 10-K are without the ® and ™ symbols, but such references are not intended to indicate, in any way, that we will not assert, to the 
fullest extent under applicable law, our rights to these trademarks, service marks and trade names. This Annual Report on Form 10-K contains additional 
trademarks, service marks and trade names of others, which are the property of their respective owners. All trademarks, service marks and trade names 
appearing in this Annual Report on Form 10-K are, to our knowledge, the property of their respective owners. We do not intend our use or display of other 
companies’ trademarks, service marks, copyrights or trade names to imply a relationship with, or endorsement or sponsorship of us by, any other 
companies.

SUMMARY RISK FACTORS

Our business is subject to numerous risks and uncertainties, including those described in Part I, Item 1A. “Risk Factors” in this Annual Report on 
Form 10-K. You should carefully consider these risks and uncertainties when investing in our common stock. The principal risks and uncertainties affecting 
our business include the following:

• We are a development-stage company and have incurred significant losses since our inception. We expect to incur losses for the foreseeable 

future and may never achieve or maintain profitability.

• We will need additional funding in order to complete development of our product candidates and commercialize our products, if approved. If we 

are unable to raise capital when needed, we could be forced to delay, reduce or eliminate our product development programs or 
commercialization efforts.

•

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

3

 
 
•

•

•

•

•

•

Other than SER-109 and SER-287, we are early in our development efforts and may not be successful in our efforts to use our microbiome 
therapeutics platform to build a pipeline of product candidates and develop marketable drugs. 

Our product candidates are based on microbiome therapeutics, which is an unproven approach to therapeutic intervention.

Clinical drug development involves a risky, lengthy and expensive process, with an uncertain outcome. We may incur additional costs or 
experience delays in completing, or ultimately be unable to complete, the development and commercialization of our product candidates.

Delays or difficulties in the enrollment of patients in clinical trials, could result in our receipt of necessary regulatory approvals being delayed or 
prevented.

 If we are not able to obtain, or if there are delays in obtaining, required regulatory approvals, we will not be able to commercialize our product 
candidates or will not be able to do so as soon as anticipated, and our ability to generate revenue will be materially impaired. Additionally, failure 
to obtain marketing approval in international jurisdictions would prevent our product candidates from being marketed abroad.

Our collaboration and license agreements with Société des Produits Nestlé S.A. and NHSc Pharma Partners (collectively,  Nestlé) are important 
to our business. If we or Nestlé fail to adequately perform under these agreements, or if we or Nestlé terminate the agreements, the development 
and commercialization of our CDI and IBD product candidates, including SER-109, SER-287 and SER-301, could be delayed or terminated and 
our business would be adversely affected.

• We rely, and expect to continue to rely, on third parties to conduct our clinical trials, and those third parties may not perform satisfactorily, 

including failing to meet deadlines for the completion of such trials.

• We rely on third parties for certain aspects of the manufacture of our product candidates for preclinical and clinical testing and expect to continue 
to do so for the foreseeable future. This reliance on third parties increases the risk that we will not have sufficient quantities of our product 
candidates or that such quantities may not be available at an acceptable cost, which could delay, prevent or impair our development or 
commercialization efforts.

•

Even if any of our product candidates receive marketing approval, it may fail to achieve the degree of market acceptance by physicians, patients, 
hospitals, third-party payors and others in the medical community necessary for commercial success.

• We face substantial competition, which may result in others discovering, developing or commercializing competing products before or more 

successfully than we do.

•

•

•

If we are unable to adequately protect our proprietary technology or obtain and maintain issued patents that are sufficient to protect our product 
candidates, others could compete against us more directly, which would have a material adverse impact on our business, results of operations, 
financial condition and prospects.

The COVID-19 pandemic has adversely impacted and could continue to adversely impact, our business, including our preclinical studies and 
clinical trials, results of operations and financial condition.

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

• We may expand our operational capabilities, and as a result, we may encounter difficulties in managing our growth, which could disrupt our 

operations.

• 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.

4

Item 1. Business

PART I

Overview

We are a microbiome therapeutics company developing a novel class of live biotherapeutic drugs, which are consortia of microbes designed to treat 

disease by modulating the microbiome to treat or reduce disease by repairing the function of a disease susceptible microbiome to a non-disease state. We 
have an advanced drug pipeline with late-stage clinical assets that are formulated for oral delivery and a differentiated microbiome therapeutics drug 
discovery and development platform including good manufacturing practices, or GMP, manufacturing capabilities for this novel drug modality.  

Our highest priority is preparing a biologics license application, or BLA, for submission to the U.S. Food and Drug Administration, or FDA, and 

preparing for potential commercialization of SER-109, an investigational oral microbiome therapeutic in development for recurrent Clostridioides difficile 
infection, or CDI. We intend to seek agreement with the FDA to begin a rolling BLA submission for SER-109 in the first half of 2022 and to finalize the 
submission with data from the safety database in mid-2022. SER-109 has obtained Breakthrough Therapy designation, and as a result, we expect priority 
review by the FDA.

We are also designing microbiome therapeutics to decolonize pathogens and modulate host function to reduce and prevent infections. We believe 

that the scientific and clinical data from our SER-109 program validate this novel approach, which we refer to as infection protection. We believe the 
infection protection approach may be replicable across different bacterial pathogens to develop microbiome therapeutics with the potential to protect a 
range of medically compromised patients from infections. We are evaluating SER-155 in a Phase 1b study in patients receiving allogeneic hematopoietic 
stem cell transplantation, or allo-HSCT, to reduce incidences of gastrointestinal infections, bloodstream infections and graft-versus-host disease, or GvHD. 
We are also evaluating additional preclinical stage programs in indications such as cancer neutropenia, solid organ transplant, and antimicrobial resistant 
infections more broadly.

We continue to focus our resources on evaluating SER-301 in a Phase 1b study in patients with mild-to-moderate ulcerative colitis, or UC, and on 

analyzing additional biomarker data from our Phase 2b study evaluating SER-287 in patients with mild-to-moderate UC. In July 2021, we announced 
topline results from the SER-287 Phase 2b study, which did not meet its primary endpoint of improving clinical remission rates compared to placebo.  
Following the data readout, in December 2021, we completed preliminary microbiome drug pharmacology analyses that demonstrated the successful 
engraftment of SER-287 bacterial species. However, unlike the Phase 1b study, anticipated changes in disease-relevant metabolites post-administration 
with SER-287 in the Phase 2b study were not observed. In addition, we have completed preliminary analysis of data from the first cohort of the SER-301 
Phase 1b study, which included 15 subjects. Evaluation of the first cohort data by an independent Data Safety Monitoring Board indicated that it would be 
safe to proceed to the placebo-controlled second cohort. While efficacy was not a defined endpoint in the first cohort, evaluation of clinical outcome data 
collected as part of the study indicated that no subjects in the first cohort achieved clinical remission as defined by the FDA using the Three-Component 
Modified Mayo Score after 10 weeks of treatment, though there were improvements in one or more individual components (endoscopic, stool frequency 
and rectal bleeding subscores) in some patients. Strains in SER-301 were observed to engraft in subjects across the trial period, and based on the 
assessment of metabolomic data, SER-301 demonstrated pharmacological properties consistent with its design and led to baseline-dependent modulation of 
the metabolic landscape in the gastrointestinal tract of patients treated. We continue to conduct analyses of data from our SER-287 and SER-301 UC 
clinical stage programs to inform next steps for further development. 

In addition, we continue to evaluate opportunities to advance our technology in modulating host immunity to have an impact on and treat diseases 

such as cancer and various autoimmune diseases.

SER-109, our lead clinical candidate, which has successfully completed a Phase 3 clinical study, is designed to rapidly modulate the gastrointestinal 

microbiome in patients with recurrent CDI. CDI is most often caused by the use of broad-spectrum antibiotics, which disrupt the gastrointestinal 
microbiome by decreasing microbial diversity, thus increasing susceptibility to infection by Clostridioides difficile, or C. difficile, a spore forming 
bacterium. C. difficile expresses toxins leading to debilitating diarrhea in infected patients, and can also cause more severe outcomes, such as inflammation 
of the colon (colitis), toxic megacolon and death. The U.S. Centers for Disease Control, or CDC, has identified CDI as one of the top three most urgent 
bacterial threats in the United States. It is the most common cause of hospital acquired infection in the United States and has overtaken methicillin-resistant 
Staphylococcus aureus, or MRSA, in incidence of disease. CDI is responsible for the deaths of over 20,000 Americans each year. There are approximately 
453,000 cases of primary CDI within the United States each year and approximately 170,000 incidences of recurrent CDI. The standard of care for CDI is 
to treat with antibiotics. In many cases, antibiotic treatments may kill vegetative toxin-producing C. difficile bacteria thus resolving symptoms of C. 
difficile. However, these antibiotic treatments also kill beneficial bacteria indiscriminately, thus maintaining or exacerbating the disrupted microbiome, 
potentially making patients more susceptible to a recurrence of CDI. Furthermore, antibiotics do not eliminate C. difficile spores, allowing the spores to 
rapidly germinate in a disrupted microbiome and cause a recurrence of the infection. Published data suggests that the risk of recurrence is approximately 
25% after the 

5

 
 
primary CDI and increases to greater than or equal to 40% after a first recurrence. SER-109, if approved, is designed to treat individuals with recurrent 
CDI.  

SER-109 is an oral microbiome therapeutic candidate consisting of a consortium of purified Firmicutes spores. The SER-109 manufacturing 
purification process is designed to remove unwanted microbes in an effort to reduce the risk of pathogen transmission beyond donor screening alone. SER-
109 is designed to reduce recurrent CDI in patients with a history of CDI by modulating the microbiome to a state that resists C. difficile germination and 
growth.

  The Phase 3 ECOSPOR III study was a multicenter, randomized, placebo-controlled study that enrolled 182 patients with multiply recurrent CDI. 

The study was designed to evaluate patients for 24 weeks with the primary endpoint comparing the C. difficile recurrence rate in subjects who received 
SER-109 verses placebo at up to eight weeks after dosing. Previously reported topline data demonstrated that the study achieved its primary endpoint 
where SER-109 was superior to placebo in reducing CDI recurrence at eight weeks, reflecting a sustained clinical response rate of approximately 88% at 
eight weeks post-treatment. SER-109 resulted in a 27% absolute reduction of recurrence of CDI compared to placebo at eight weeks post-treatment, which 
is a relative risk reduction of 68%. The number-needed-to treat was 3.6. The rate of recurrence at 12 weeks in the SER-109 arm was 18.0%, compared to a 
rate of 46.2% in the placebo arm, representing an absolute risk reduction of 28% (relative risk 0.40; 95% CI 0.24-0.65; p <0.001 and p< 0.002 for the test 
sequence), and thereby consistent with the results seen at eight weeks.  Results across stratifications of age and antibiotics remained similar. The study’s 
efficacy results related to the primary endpoint from all analyses exceeded the statistical threshold previously provided in consultation with the FDA that 
could allow this single clinical study to fulfill efficacy requirements for a BLA.  The efficacy results remained durable through 24 weeks of follow-up, as 
SER-109 was observed to significantly reduced recurrence rates compared to placebo over 24 weeks, 21.3% vs. 47.3%, respectively. In January 2022, these 
data were published in the New England Journal of Medicine (N Engl J Med 2022;386(3):220-229). 

We believe the SER-109 safety results across completed studies have been favorable, with an adverse event profile comparable to placebo. In 
September 2021, we achieved target enrollment of 300 subjects with the ECOSPOR IV open-label study. The target enrollment of a minimum of 300 
subjects for the SER-109 safety database was reached in conjunction with the prior completed Phase 3 ECOSPOR III study. To support a BLA submission, 
Seres is required by the FDA to provide safety data from at least 300 subjects who have received the proposed commercial dose of SER-109 with a 24-
week follow-up period. The ECOSPOR IV open-label study includes patients with recurrent CDI, including individuals with a first recurrence of CDI. We 
intend to seek agreement with the FDA to begin a rolling BLA submission for SER-109 in the first half of 2022 and finalize the submission with data from 
the safety database in mid-2022. SER-109 has obtained Breakthrough Therapy designation, and as a result, we expect priority review by the FDA.

In November 2021, we initiated a SER-109 expanded access program across the United States. The program is designed to enable eligible adults 

with recurrent CDI to obtain access to SER-109 prior to a potential FDA product approval.

SER-155, an oral microbiome therapeutic candidate consisting of a consortium of cultivated bacteria, is designed to decrease infection and 

translocation of antibiotic resistant bacteria in the gastrointestinal tract and modulate host immune responses to decrease GvHD. The rationale for this 
program is based in part on published clinical evidence from our collaborators at Memorial Sloan Kettering Cancer Center showing that allo-HSCT patients 
with decreased diversity of commensal microbes were significantly more likely to die due to infection and/or lethal GvHD. SER-155 was designed using 
our reverse translational discovery platform to potentially reduce incidences of gastrointestinal infections, bloodstream infections and GvHD in  patients 
receiving allo-HSCT. The SER-155 Phase 1b study is designed to include approximately 70 patients in both an open-label and a randomized, double-blind, 
placebo-controlled cohort that will evaluate safety and tolerability before and after HSCT. Additionally, the engraftment of SER-155 bacteria (a measure of 
pharmacokinetics) and the efficacy of SER-155 in protecting patients from infections and GvHD will be evaluated. In November 2021, we enrolled the first 
patient in the SER-155 Phase 1b study.

SER-287, an oral microbiome therapeutic candidate consisting of a consortium of purified Firmicutes spores, is designed to restore a healthy 
gastrointestinal microbiome in individuals with UC. There are over 700,000 UC patients in the United States and fewer than one-third of patients on current 
therapies achieve remission. Approved treatments are often inadequate to control disease activity and are often associated with significant side effects, 
including immunosuppression. 

In July 2021, we announced topline results from the Phase 2b study evaluating SER-287 in patients with mild-to-moderate UC.  The study did not 
meet its primary endpoint of improving clinical remission rates compared to placebo. The primary objective of the induction portion of the Phase 2b study 
was to evaluate the safety and efficacy of SER-287, after 10 weeks of induction dosing (following vancomycin pre-conditioning) in achieving clinical 
remission in participants with mild-to-moderate UC. The trial was a randomized, placebo controlled, double blind, parallel group multicenter study which 
enrolled 203 UC patients at approximately 100 sites throughout the U.S. and Canada.  Dosing was explored in two SER-287 cohorts (full induction dose 
and step-down induction dose) versus placebo and patients were randomized according to a 1:1:1 ratio. Clinical remission was analyzed and defined by a 3-
component modified Mayo Score. No statistically significant differences were observed in absolute clinical remission rates between the three treatment 
arms (10.3% for the full induction dose, n=68 and 10.6% for the step-down induction dose, n=66 versus 11.6% for placebo, n=69). There were also no 
statistically significant differences observed across the three treatment groups for endoscopic improvement, endoscopic remission or symptomatic 
remission.

6

Both dosing regimens of SER-287 were generally well tolerated. Treatment emergent adverse events, or AEs, were observed in 67.6%, 46.2% and 

50.7% of subjects in the induction dose, step-down dose (both of which included six days of oral vancomycin preconditioning) and placebo treatment arms, 
respectively.  The majority of observed AEs were mild or moderate in severity.  The most commonly observed AEs were UC, diarrhea, nausea and 
abdominal distension.  Four participants on active treatment reported serious treatment emergent adverse events (worsening UC, colonic dysplasia, 
congestive heart failure with decreased hemoglobin, and appendicitis), as did one on placebo (worsening UC).

In December 2021, we completed preliminary microbiome drug pharmacology analyses from the Phase 2b study that demonstrated the successful 
engraftment of SER-287 bacterial species. Based on the SER-287 Phase 2b microbiome data analyses, engraftment of SER-287 bacteria, measured as the 
median number of bacteria observed across patients post treatment, was statistically significant in patients receiving SER-287 versus placebo (p ≤ 0.001 at 
all timepoints). The magnitude and kinetics of engraftment were comparable to our Phase 1b study. However, unlike the Phase 1b study, anticipated 
changes in disease-relevant metabolites post-administration with SER-287 in the Phase 2b study were not observed. Analysis of the genomic and 
metabolomic data characterizing the microbiome of SER-287 study participants at baseline and post dosing suggest potential biomarkers for inclusion of 
targeted patient subpopulations in future development efforts. 

We are also advancing SER-301, a therapeutic candidate for UC. SER-301 is a rationally-designed consortia of cultivated bacteria designed using 

our reverse translational discovery platform that incorporates analysis of microbiome biomarkers from human clinical data and preclinical assessments 
using human cell-based assays and in vitro/ex vivo and in vivo disease models. SER-301 is formulated for oral delivery. The design of SER-301 
incorporates insights obtained from the SER-287 Phase 1b clinical and microbiome results, as well as from our clinical portfolio more broadly, and 
additional functional data from preclinical assessments, in an effort to optimize desired pharmacological properties. SER-301 is designed to reduce 
induction of pro-inflammatory activity, improve epithelial barrier integrity and TNF-α driven inflammation in intestinal epithelial cells, or IECs, and 
modulate UC-relevant anti-inflammatory, innate and adaptive immune pathways. SER-301 is being produced by our advanced fermentation, formulation 
and delivery platforms. It includes strains delivered in spore form, as well as strains fermented in non-spore (vegetative) form and delivered using 
enterically-protected technology designed to release in the colon. 

The SER-301 Phase 1b study is being conducted in Australia and New Zealand in subjects with mild-to-moderate UC and is designed to include 

approximately 65 patients distributed across two cohorts.  

We have completed preliminary analysis of data from the first cohort of the SER-301 Phase 1b study, which included 15 subjects. Evaluation of the 
first cohort data by an independent Data Safety Monitoring Board indicated that it would be safe to proceed to the placebo-controlled second cohort. While 
efficacy was not a defined endpoint in the first cohort, evaluation of clinical outcome data collected as part of the study indicated that no subjects in the first 
cohort achieved clinical remission as defined by the FDA using the Three-Component Modified Mayo Score after 10 weeks of treatment, though there 
were improvements in one or more individual components (endoscopic, stool frequency and rectal bleeding subscores) in some patients. Strains in SER-
301 were observed to engraft in subjects across the trial period with the number of engrafting strains exceeding expectations at multiple sampling time 
points. A dual formulation was evaluated in the first cohort and the extent of engraftment across subjects was correlated with whether bacteria were 
formulated as bacterial spores versus vegetative strains; the former demonstrating stronger engraftment across all patients.

Based on the assessment of metabolomic data, SER-301 demonstrated pharmacological properties consistent with its design and led to baseline-

dependent modulation of the metabolic landscape in the gastrointestinal tract of patients treated; changes were observed in short-chain and medium-chain 
fatty acids, tryptophan-derived metabolites, bile acids, and other microbe-associated metabolites, as well as host metabolites associated with a non-disease 
state. These SER-301 metabolomic results were encouraging compared with the results observed in the SER-287 Phase 2b study, in which the metabolic 
changes were not observed in general across subjects administered with SER-287. Additionally, changes in disease-relevant metabolites in SER-301 were 
observed to be greater in a definable subpopulation of patients.

The degree of metabolic changes observed following SER-301 administration appeared to be dependent on the baseline metabolic profile of the 

study subjects, providing support for the potential for microbiome therapeutics to be developed in biomarker-identified UC patient subpopulations. 

We continue to conduct analyses of data from our SER-287 and SER-301 UC clinical stage programs to inform next steps for further development. 

We have assembled a world class group of scientists, clinicians, directors and investors, who have established our leadership in the field of 

microbiome therapeutics. We were co-founded by Drs. Noubar Afeyan, David Berry and Geoffrey von Maltzahn of Flagship Pioneering. Through Flagship 
Pioneering’s contribution of foundational scientific concepts and intellectual property, assembly of our management team and critical early-stage support, 
we launched as the first company focused on the ecological nature of the microbiome. Led by Eric Shaff, our President and Chief Executive Officer, our 
experienced management team possesses core capabilities and know-how in microbiome therapeutics, drug development, commercialization, chemistry, 
manufacturing and controls, or CMC, public company management and finance. 

7

Our goal is to remain the leading biopharmaceutical company developing and commercializing microbiome therapeutics to address significant 

unmet medical needs. We intend to focus in the near term on gaining FDA approval for SER-109 for recurrent CDI and continuing development of our 
highest priority clinical programs. Additionally, we continue to advance our differentiated microbiome drug discovery, development and manufacturing 
platforms and capabilities.  

Advancing our Programs

Our Strategy

•

•

•

•

Preparing a BLA submission for our lead product candidate, SER-109, for patients with recurrent CDI. Analyses from the Phase 3 
ECOSPOR III study demonstrated that SER-109 achieved its primary endpoint of superiority to placebo in reducing CDI recurrence at week 
8 in patients with recurrent CDI. We achieved target enrollment in our open-label study of SER-109 in patients with recurrent CDI, which 
also admits patients with a single recurrence of recurrent CDI, to expand the SER-109 safety database. Based on our interactions with the 
FDA to date, we believe the ECOSPOR III efficacy results should support a BLA submission without conducting an additional pivotal study. 
We intend to seek agreement with the FDA to begin a rolling submission of the BLA for SER-109 in the first half of 2022 and finalize the 
submission with data from the safety database in mid-2022. SER-109 has obtained Breakthrough Therapy designation, and as a result, we 
expect priority review by the FDA.

Advancing preparations for potential commercialization of SER-109. In July 2021, we announced a partnership with Nestlé, which will 
utilize its global pharmaceutical business, Aimmune Therapeutics, Inc., to jointly commercialize SER-109, if approved, in the United States 
and Canada. Commercial product supply for the initial phase of U.S. commercial supply is being produced at our Cambridge manufacturing 
facility and further processed at GenIbet, a contract manufacturing organization, or CMO, which was acquired in February 2022 by 
Recipharm AB, or Recipharm, a multi-national CMO based in Sweden. In November 2021, we entered into a collaboration with BacThera 
AG, or Bacthera, a global leader in biopharmaceutical product manufacturing, to expand upon our existing capabilities for commercial 
product supply to meet anticipated demand in later years. Under the terms of the agreement, Bacthera will construct a dedicated full-scale 
production suite for us at Bacthera’s Microbiome Center of Excellence in Visp, Switzerland, which is currently under construction, and 
provide manufacturing services to us for SER-109.

Maximizing the opportunity in infection protection. We believe that the scientific and clinical data from our SER-109 program validate our 
novel approach of using microbiome therapeutics to decolonize pathogens and modulate host function to reduce and prevent infections. This 
approach, which we refer to as infection protection, may be replicable across different bacterial pathogens to develop microbiome 
therapeutics with the potential to protect a range of medically compromised patients from infections. We are evaluating SER-155 in a Phase 
1b study in patients receiving allo-HSCT to reduce incidences of gastrointestinal infections, bloodstream infections and GvHD. In November 
2021, we enrolled the first patient in the SER-155 Phase 1b study. We are also evaluating additional preclinical stage programs in indications 
such as cancer neutropenia, solid organ transplant, and antimicrobial resistant infections more broadly. 

Optimizing plans for continued development in UC based on SER-287 and ongoing SER-301 trial data. We are developing SER-301, a 
microbiome therapeutic candidate comprised of a consortium of cultivated bacteria, for the treatment of UC leveraging pharmacokinetic and 
pharmacodynamic data from our SER-287 clinical trial, our knowledge of modulation of the microbiome seen in patients with UC, as well as 
insights from our SER-262 clinical study. The SER-301 Phase 1b study is being conducted in Australia and New Zealand in subjects with 
mild-to-moderate UC and is designed to include approximately 65 patients distributed across two cohorts. We have completed preliminary 
analysis of data from the first cohort of the SER-301 Phase 1b study, which included 15 subjects. Evaluation of the first cohort data by an 
independent Data Safety Monitoring Board indicated that it would be safe to proceed to the placebo-controlled second cohort. While efficacy 
was not a defined endpoint in the first cohort, evaluation of clinical outcome data collected as part of the study indicated that no subjects in 
the first cohort achieved clinical remission as defined by the FDA using the Three-Component Modified Mayo Score after 10 weeks of 
treatment, though there were improvements in one or more individual components (endoscopic, stool frequency and rectal bleeding 
subscores) in some patients. Strains in SER-301 were observed to engraft in subjects across the trial period, and based on the assessment of 
metabolomic data, SER-301 demonstrated pharmacological properties consistent with its design and led to baseline-dependent modulation of 
the metabolic landscape in the gastrointestinal tract of patients treated. We continue to conduct analyses of data from our SER-287 and SER-
301 UC clinical stage programs to inform next steps for further development. 

8

Advancing Our Capabilities

•

•

Leveraging our leading reverse translation microbiome therapeutics platform to develop additional innovative and novel microbiome 
therapeutics across a range of serious medical conditions with high unmet need including infectious and inflammatory disease and 
disease associated with modulation of host immunity. We believe that the combination of experience, proprietary data and proprietary know-
how related to the microbiome, the functional properties of microbial species and strains, microbe-host interactions, the cultivation of 
microbial strains, and microbiome-specific functional screens and analytics provides us a competitive advantage in the design and 
development of microbiome therapeutics. Our platform enables us to build upon our existing and growing clinical experience to rationally 
design treatments for acute and complex chronic diseases. We intend to leverage this advantage to develop additional innovative microbiome 
therapeutics.

Developing manufacturing capabilities sufficient to support commercialization of any approved microbiome therapeutic candidates. 
Microbiome therapeutic manufacturing requires capabilities that are distinct from other biologic drugs. We have made strategic investments 
in manufacturing capabilities to help ensure that we maintain control of our know-how and also because we believe these capabilities will be 
necessary and highly advantageous for the development of future microbiome therapeutic candidates. Our bioprocess and manufacturing 
personnel are focused on creating a platform of manufacturing expertise that will set the stage for further advances in the emerging field of 
microbiome therapeutics.

Our Microbiome Therapeutics Platform 

We have developed the leading microbiome therapeutics platform which we believe enables us to apply our capabilities to efficiently identify, 

manufacture and develop novel microbiome therapeutics for serious human diseases. We use a reverse translational discovery platform that incorporates 
analysis of microbiome biomarkers from human clinical data and preclinical assessments using human cell-based assays and in vitro/ex vivo and in vivo 
disease models. Specifically, we start with data sets from both healthy subjects and subjects with disease to delineate at high-resolution the composition of 
the microbiome and physiological state of subjects and to identify specific microbiome and host signatures that associate with disease or the onset of 
disease. These in-human insights on how different microbe species and strains and microbe-associated metabolites are associated with disease along with 
how these microbes and metabolites directly or indirectly modulate disease-relevant functional pathways in the host are leveraged in preclinical drug design 
and development. 

Our discovery process begins with human data derived from clinical trials and cohort studies, which we use as a basis for target identification and 

the design of our microbiome therapeutic candidates. We compare healthy, normal colonic microbiomes to those in an unhealthy disrupted or disease state, 
revealing the ecological, compositional and functional differences between various states of disease and during the transition from health to disease or vice 
versa. Specifically, we utilize high-value clinical data sets combined with advanced data sciences and microbiome analytics to identify microbiome 
signatures of disease at the resolution of specific species and strains, metabolites, and even genes that are associated with disease states. These microbiome 
biomarkers are associated with host signatures and biomarkers of disease to identify drug targets for our microbiome therapeutics. Our clinical data from 
the SER-109, SER-262, SER-287 and SER-301 programs, and microbiome data generated with external collaborators, serve to instruct us on how the 
introduction of certain keystone microbes have the potential to restructure the microbiome and modulate the metabolic state of the gut to shift it to a non-
disease state. 

We have developed a proprietary functionally characterized strain library and a suite of assays and screens, bioinformatics and computational tools, 
and databases, which facilitate our insights into the human microbiome. We have established proprietary, curated, reference databases and algorithms that: 
(i) integrate high-resolution genomic, metagenomic, metabolomic, and transcriptomic data sets, and data from in vitro and human cell-based assays, and in 
vitro/ex vivo and in vivo disease models, and (ii) enable us to track changes in the microbiome at the level of microbial species and individual strains and 
associate these changes with changes in the metabolic state of the gut and host physiology. Our analytics can integrate gene profiling and metabolomics 
data (the small molecules made by the microbiome) with genomic data (the collection of microbes defined by sequencing) to delineate microbiome 
biomarkers (the specific species or strains and functional pathways) that contribute to the state of disease or health. Further, we have established de novo 
analytics for pharmacokinetic and pharmacodynamic assessments of microbiome therapeutics.  Additionally, leveraging all of these data we have curated 
and continue to build a database that links and associates: (i) functional properties of microbial species/strains, (ii) functional pathways in hosts that can be 
modulated by the microbiome, (iii) the association of functional pathways to disease, and (iv) the association of existing non-microbiome drugs to the 
functional pathways. This continually growing database can be mined to inform drug design and disease area and patient population prioritization.

9

Our proprietary strain library of bacterial isolates from healthy donors and patients enables us to translate microbiome biomarker insights into 
defined consortia of bacteria. The strain library contains bacterial species isolated from individuals that are either healthy or that have a disease. Seres has 
developed extensive isolation and cultivation know-how. The strain library contains a majority of the Human Microbiome Project’s “most wanted” and 
many novel species not described in other databases or the scientific literature. The functional properties of strains are characterized using proprietary in 
vitro and ex vivo human cell-based assays as well as full-genome sequences and genome functional annotation. Functional characterization of target strains 
includes properties such as how the bacteria interact with human colonic epithelial cells and human immune cells. We also seek to understand how these 
microbes improve the health of barrier cells in the gut and how they may impact immune responses.

We select bacteria from our library with specific predicted properties using novel algorithms for in silico functional design and optimization and 
grow the compositions in the lab to be tested both in vitro/ex vivo models as delineated above and in in vivo animal models. Our animal models include 
conventional mice, germ-free mice, and “humanized avatar” mice that possess only bacteria derived from humans; these models were developed to 
minimize confounding variables presented by model organism microbes. Data from our in vitro/ex vivo and in vivo screens are analyzed and used to 
optimize compositional designs; introducing new bacterial strains and optimizing existing strains until we identify a lead composition suitable for clinical 
testing.

Finally, we manufacture the bacterial composition under current Good Manufacturing Practices, or cGMP, which are required by FDA and European 

regulators. We believe our unique manufacturing capacities position us to exploit the insights of our proprietary human data and the novel biology of 
species and strains that have not previously been used for therapeutics. We have optimized fermentation conditions to generate spores and enhance bacterial 
yields in anaerobic fermentation and have in-house capabilities to formulate both spores and live non-spore bacteria. Our manufacturing facility in 
Cambridge, Massachusetts was designed to be fit-for-purpose and is highly differentiated compared to the offerings of commercial contract research 
organizations. We have secured additional capacity, designed to our specifications, via contract manufacturing organizations, or CMOs, to ensure adequate 
supply for potential commercial products. We continue working to address quality control requirements for our microbiome therapeutic candidates using 
proprietary microbiological and sequence-based testing schemes, including high-throughput quantitative analytics to assess the identity, potency, and purity 
of the final product. We intend to work with regulators to meet the requirements for product approval. 

Taken together, we believe our platform, spanning drug discovery, preclinical translation, and novel manufacturing and quality control approaches, 

has enabled a field leading pipeline across a range of therapeutics areas.

Disease Overview and Our Product Pipeline

We believe our microbiome therapeutic candidates represent a novel approach with potential application across a broad range of human diseases. 

Our lead product candidate, SER-109, is designed to reduce further recurrence of CDI, a debilitating infection of the colon, in patients who have received 
antibiotic therapy for recurrent CDI by restructuring the gastrointestinal microbiome and modulating the metabolic landscape to address CDI. In August 
2020, we announced that SER-109 had achieved its primary endpoint of superiority to placebo in reducing CDI recurrence at week 8 in our Phase 3 
ECOSPOR III clinical trial in patients with recurrent CDI. SER-109 was observed to be well tolerated, with no treatment-related serious adverse events 
observed in the active arm and adverse events comparable to placebo. If approved by the FDA, we believe SER-109 will be a first-in-field oral microbiome 
drug. Building upon SER-109, we are developing novel microbiome therapeutics, such as SER-155, to specifically target infections and antimicrobial 
resistance. SER-155, a microbiome therapeutic candidate consisting of a consortium of cultivated bacteria, is designed to reduce incidences of 
gastrointestinal infections, bloodstream infections and GvHD in patients receiving allo-HSCT. In addition, using our microbiome therapeutics platform, we 
are also developing SER-287 and SER-301 to treat UC. We continue to evaluate microbiome pharmacokinetic and pharmacodynamic data from across our 
clinical and pre-clinical portfolios using our reverse translation microbiome therapeutics capabilities to conduct research on various indications, including 
inflammatory and immune diseases, cancer, and metabolic diseases.  

CDI Overview and SER-109

Clostridioides difficile Infection 

C. difficile is a Gram-positive, toxin-producing, spore forming bacterium that may cause debilitating diarrhea in infected individuals, but can also 

lead to more severe outcomes, such as inflammation of the colon, or colitis, toxic megacolon and death. C. difficile bacteria express toxins that disrupt the 
structural architecture of cells causing leakage of fluids through the gastrointestinal, or GI, epithelium. The cells disrupted by these toxins eventually 
undergo apoptosis and die, disrupting the epithelial barrier and exposing the immune system to inflammatory stimuli, severe and persistent diarrhea and, in 
the most serious cases, death.

CDI is most often associated with the prior use of antibiotics, although age and poor immune status are important risk factors as well. Antibiotics are 

thought to decrease colonization resistance to CDI by disrupting the microbiome. Since C. difficile spores are able to survive for long periods of time 
outside the body, and because healthcare settings are often sites of significant antibiotic use, CDI is a leading cause of healthcare-associated infections in 
the United States. CDI is also a cause of morbidity and mortality among hospitalized cancer patients and bone marrow transplant patients as their immune 
systems are suppressed by cytotoxic drugs, which 

10

inhibit or prevent the functioning of cells, and they may be heavily treated with antibiotics to prevent or treat infections. More recently, the rise of 
community-acquired CDI has been recognized as a growing problem.

The Centers for Disease Control and Prevention, or CDC, has identified C. difficile as one of the top three most urgent antibiotic-resistant bacterial 
threats in the United States. It is the most common cause of hospital acquired infection in the United States, having overtaken MRSA. CDI is responsible 
for the deaths of over 20,000 Americans each year. There are approximately 453,000 cases of primary CDI within the United States each year and 
approximately 170,000 incidences of recurrent CDI. CDI is also costly to the healthcare system. According to a study published in Clinical Infectious 
Diseases, the economic burden of CDI in 2008 in U.S. acute care facilities alone was estimated to be as much as $4.8 billion. In addition, the average 
recurrent CDI treatment cost in the U.S. is estimated to be $34 thousand per patient, comprising mostly (88%) hospital-related costs (Rodrigues Infect 
Control Hosp Epidemiol 2017). The national incidence of CDI remains high despite declining from 476,000 in 2011 to 462,000 in 2017 (Guh, New 
England Journal of Medicine 2020). Further, according to a 2014 article in the American Journal of Infection Control, from 2001 to 2010, incidence of CDI 
per 1,000 patients discharged increased from 4.5 to 8.2 with an average hospital stay of eight days. Due to suboptimal approaches to treatment, patients 
with primary CDI have an approximate 20% - 25% change of recurrent infection increasing to greater than 40% after the first recurrence (Gerding, CID 
2018; Lashner ACG 2020; Dubberke CID 2018). 

Current and developing treatment alternatives and their limitations

Antibiotics.  According to the Infectious Disease Society of America, or IDSA, guidelines, the current standard of care for primary CDI is to treat 

with antibiotics, such as fidaxomicin or vancomycin. Fidaxomicin is recommended to treat primary CDI, it does not have a label claim to reduce or prevent 
CDI recurrence. No antibiotic therapeutics are currently approved for treatment of recurrent CDI. 

Recurrent CDI, defined as the presence of diarrhea and a positive C. difficile stool assay within two to eight weeks following the initial episode, is 
not well addressed by any of the available antibiotics. The risk of recurrent CDI increases to greater than 40% after the first recurrence. In extreme cases, 
patients may be treated continuously for years with vancomycin.

Antibiotics have two major limitations: they have no effect on the spores that germinate in a disrupted microbiome and their use appears to 
exacerbate microbiome disruption, resulting in increased risk of future CDI. Research in animal models has shown that antibiotic use not only eliminates 
many healthy bacteria in the GI tract, but also leads to the release of nutrients that facilitate the growth of C. difficile. Antibiotics have also been shown to 
change the ratio of primary versus secondary bile acids in the colon by killing bacteria required to metabolize bile acids. This shift to a predominance of 
primary bile acids further facilitates the growth of C. difficile, as it requires primary bile acids for germination of its spores. As a result, antibiotic use may 
induce a lasting microbiome disruption that makes it possible for C. difficile to colonize a person and then cause, or further perpetuate, disease.

Fecal microbiota transplantation.  FMT, also known as a stool transplantation, is an unapproved procedure during which donated stool, including 

fecal microbes, is typically instilled via colonoscopy into a patient with recurrent CDI. FMT presents several challenges for effective treatment of the 
disease. FMT has the potential to transmit infectious or allergenic agents between hosts, involves the transmission of hundreds of unknown strains of 
bacteria, fungi, viruses and potentially parasites from donor to subject, and is difficult to perform on a mass scale. In November 2019 the FDA held a public 
hearing to obtain input on the use of FMT to treat Clostridioides difficile infection not responsive to standard therapies. Presentations were made by the 
academic community and development companies regarding the current and future use of FMT. In January, 2020, we submitted comments to the docket for 
the meeting that recommended: 1) increased scrutiny and regulation of unapproved, commercially available FMT that does not comply with IND 
requirements; 2) implementation of guidance for establishing safety of source materials for all microbiome products; and 3) safety and efficacy of all 
microbiome products to reduce recurrent CDI must be based on adequate and well controlled clinical trials including accurate assurance of diagnosis of the 
disease state – specifically toxin testing.  

Additionally, FMT is inherently non-standardized so that different desired and/or undesired material may be transmitted in any given donation. FMT 
is not approved by the FDA and we believe that, as currently practiced by clinical centers in the United States, it may be unable to gain such approval since 
the product, to our knowledge, cannot be characterized according to current regulatory requirements for identity, potency, purity and safety and has not 
been tested in rigorous, placebo controlled, randomized and blinded clinical studies. Commercial providers of FMT must meet FDA regulatory 
requirements for a biologics license and must produce FMT material using cGMP.

Antibodies. Bezlotoxumab a fully human monoclonal antibody directed against C. difficile toxin B was approved in the United States in October 

2016 and in Europe in 2017 for the treatment of CDI. The antibody demonstrated 10% absolute risk reduction in preventing recurrence of CDI. Antibodies 
bind toxins to alleviate the symptoms of CDI, but they do not address the underlying disruption of the microbiome, which we believe is the cause of 
recurrent CDI. Bezlotoxumab requires intravenous infusion. 

SER-109 

SER-109 is an oral microbiome therapeutic candidate consisting of a consortium of purified Firmicutes spores. The SER-109 manufacturing 
purification process is designed to remove unwanted microbes in an effort to reduce the risk of pathogen transmission beyond donor screening alone. SER-
109 is designed to reduce recurrent CDI in patients with a history of CDI by modulating the 

11

microbiome to a state that resists C. difficile germination and growth.  SER-109 is designed to treat individuals with recurrent CDI, a patient population 
which includes approximately 170,000 cases per year in the United States.

Phase 1b/2 clinical study 

The Phase 1b/2 clinical study was an open-label, single arm, descending-dose study that enrolled 30 patients with recurrent CDI. All enrolled 
patients received standard-of-care antibiotic treatment, followed by oral administration of SER-109. Of the 30 study patients, 26 (87%) achieved the 
primary endpoint of absence of CDI (defined in this study as more than three unformed bowel movements in a 24-hour period with laboratory confirmation 
of a positive C. difficile stool test) up to eight weeks following dosing. Three of the four patients who did not meet the primary endpoint were determined 
by their primary investigator to be recovering from CDI, and all symptoms resolved without further therapeutic intervention or antibiotics. In total, 29 of 30 
patients (97%) achieved the clinical cure rate, which we defined as the absence of CDI requiring antibiotic treatment during the eight-week period after 
SER-109 dosing. SER-109 was well tolerated in the study, with the most common adverse events being mild to moderate gastrointestinal symptoms. No 
drug related serious adverse events were observed.

Phase 2 clinical study 

The Phase 2 clinical study was a randomized, double-blinded, placebo-controlled, parallel-group two arm trial that enrolled a total of 89 patients 

with a history of multiply-recurrent CDI, defined as 3 or more CDI episodes within 9 months. SER-109 was administered orally following the completion 
of antibiotic treatment for CDI. The predefined study primary efficacy endpoint was the relative risk of CDI recurrence up to 8 weeks after treatment with 
SER-109 compared to treatment with placebo. CDI recurrence was defined as diarrhea for 2 or more consecutive days, a positive CDI test, and the 
requirement for antibiotic treatment. Based on 8-week data, CDI recurrence occurred in 44% of subjects (26 of 59) who received SER-109, compared to 
53% of subjects (16 of 30) who received placebo. The relative risk of CDI recurrence for the placebo population compared to the SER-109 population was 
not statistically significant. The most commonly reported AEs in both the SER-109 and placebo arms were in the GI category, and were diarrhea, 
abdominal pain, flatulence, and nausea. No drug-related SAEs were observed. 

Analysis of Phase 1b/2 and Phase 2 clinical study results

 In our Phase 2 clinical study, the study’s primary endpoint of reducing the relative risk of CDI recurrence at up to 8 weeks after treatment was not 

achieved. In order to understand the difference in outcome between Phase 1b/2 and Phase 2 clinical studies, we conducted an analysis of the available 
clinical, microbiome and CMC data. We identified key factors that potentially explain the Phase 2 clinical study results, including issues related to both the 
accurate diagnosis of C. difficile recurrent infection, and potential suboptimal dosing of subjects in the trial. 

The key factors include:

•

•

•

•

The diagnostic test for entry may not have differentiated subjects with active CDI disease from those with other disease but who had C. 
difficile carriage (e.g., irritable bowel syndrome);

The diagnostic test for CDI recurrence during the study (the primary endpoint) overestimated recurrences, as PCR was the most common test 
performed;

The safety profile of SER-109, which may include diarrhea in the first week following dosing, led to SER-109 subjects presenting for 
evaluation of recurrence at a time when they were likely to be colonized with C. difficile leading to mistaken diagnosis of recurrent CDI; and 

The dose and dosing regimen used in the study may not have been optimal in the Phase 2 clinical study based upon an assessment of the 
microbiome response using whole metagenomics shotgun sequencing.

From our reanalysis of the phase 1b/2 and 2 trials, we learned that there is a dose-dependent response governing early SER-109 pharmacokinetics, 

with increased engraftment associated with successful CDI resolution through 8 weeks. In the Phase 2 trial, SER-109 was dosed at 1 × 108 spores based on 
equivalent clinical outcomes and week 8 engraftment measures observed between the phase 1 dosing cohorts. However, our integrated analysis of both 
trials revealed that (1) engraftment kinetics at week 1 were of greater importance for reducing rCDI than later time points, (2) week 1 engraftment was 
highly variable in Phase 2 subjects, and (3) rapid engraftment was dependent on dose, which was clearly suboptimal in the Phase 2 trial (McGovern, 2020; 
Young, 2020). We hypothesized that rapid engraftment of a microbiome therapeutic may be critical to efficacy since CDI recurrence usually occurs within 
1–3 weeks of antibiotic discontinuation, the “window of vulnerability”; consistent with this hypothesis, in the Phase 2 trial, greater engraftment of SER-109 
species at week 1 was correlated with reduced CDI rates. This correlation was not previously appreciated due to the use of lower resolution 16S rRNA gene 
amplicon–based methods used in the Phase 1b/2 study for determining drug engraftment (Khanna, 2016).

Phase 3 clinical study design 

In the Phase 3 clinical study of SER-109, patients with multiply recurrent CDI were randomized 1:1 between SER-109 and placebo. Diagnosis of 

CDI for both study entry and for endpoint analysis utilized a C. difficile cytotoxin assay, compared to the Phase 2 clinical study, where most patients were 
diagnosed by PCR. Patients in the SER-109 arm received a total SER-109 dose, 

12

administered over three days, approximately 10-fold higher than the dose used in the Phase 2 clinical study to drive rapid engraftment of SER-109 bacteria 
in treated patients. The study evaluated patients for 24 weeks and the primary endpoint was to compare the C. difficile recurrence rate in subjects who 
receive SER-109 verses placebo at up to eight weeks after dosing.  CDI recurrence is defined as diarrhea (>3 unformed bowel movements/day for 2 or 
more consecutive days), a positive CDI toxin test, and the decision by the primary investigator that antibiotic treatment is warranted. The study was 
conducted at approximately 100 sites in the United States and Canada.  

Phase 3 clinical study results

The study enrolled 182 patients with multiply recurrent CDI.  Previously reported topline data demonstrated that the study achieved its primary 

endpoint where SER-109 was superior to placebo in reducing CDI recurrence at eight weeks, reflecting a sustained clinical response rate of approximately 
88% at eight weeks post-treatment. SER-109 resulted in a 27% absolute reduction of recurrence of CDI compared to placebo at eight weeks post-treatment, 
which is a relative risk reduction of 68%. The number-needed-to treat was 3.6. The rate of recurrence at 12 weeks in the SER-109 arm was 18.0%, 
compared to a rate of 46.2% in the placebo arm, representing an absolute risk reduction of 28% (relative risk 0.40; 95% CI 0.24-0.65; p <0.001 and p< 
0.002 for the test sequence), and thereby consistent with the results seen at eight weeks.  Results across stratifications of age and antibiotics remained 
similar. The study’s efficacy results related to the primary endpoint from all analyses exceeded the statistical threshold previously provided in consultation 
with the FDA that could allow this single clinical study to fulfill efficacy requirements for a BLA.  The efficacy results remained durable through 24 weeks 
of follow-up, as SER-109 was observed to significantly reduced recurrence rates compared to placebo over 24 weeks, 21.3% vs. 47.3%, respectively. In 
January 2022, these data were published in the New England Journal of Medicine (N Engl J Med 2022;386(3):220-229).

We believe the SER-109 safety results across completed studies have been favorable, with an adverse event profile comparable to placebo. There 

was no clinically meaningful imbalance in incidence of adverse events between SER-109 and placebo arms.  Overall incidence of patients who experienced 
treatment-emergent adverse events, or TEAEs, was 92.2% for SER-109 and 91.3% for placebo.  SER-109 had no related serious treatment-related adverse 
events and no treatment related infections. The most commonly observed TEAEs were gastrointestinal disorders, the majority of which were mild to 
moderate in nature.

The study also examined the pharmacokinetics (i.e., drug bacterial species engraftment) and pharmacodynamics (i.e., metabolic changes) following 

SER-109 dosing. The data demonstrate that SER-109 administration resulted in the rapid and durable engraftment of SER-109-derived bacterial species 
into the gastrointestinal tract as soon as one week following dosing, and that this engraftment was maintained at subsequent timepoints evaluated, including 
at the eight-week timepoint corresponding to the study’s primary endpoint and the 24-week safety follow-up timepoint. The presence of SER-109 bacterial 
species was significantly greater (p<0.001) in SER-109 treated patients than in placebo patients at all timepoints evaluated. Significant differences were 
maintained in predefined subpopulation analyses of age and antibiotic use. Seres utilized advanced microbiome biomarker analytics and proprietary 
genomic reference datasets to identify, at a resolution of bacterial species, the gastrointestinal microbiome signatures associated with SER-109 engraftment.

SER-109 administration also resulted in modulation of the gastrointestinal metabolic landscape. Notably, data demonstrated a significant decrease in 

primary bile acids (p=0.038) and an increase in secondary bile acids (p<0.001) by one-week post-dosing; significant differences were maintained through 
week eight for secondary bile acids. Notably, SER-109 subjects had less variance across subjects in bile acid response than placebo subjects. Observations 
for both primary and secondary bile acids were maintained in predefined subpopulation analyses of age and antibiotic use. All microbiome analyses were 
conducted according to the treatment subjects actually received. Published research as well as preclinical studies have demonstrated that primary bile acids 
support germination of C. difficile spores that are the source of disease recurrence. In contrast, secondary bile acids have been reported to inhibit 
germination and the growth of C. difficile (Theriot and Young, Annu. Rev. Microbiol. 2015).

In September 2021, we achieved target enrollment of 300 subjects with the ECOSPOR IV open-label study. The target enrollment of a minimum of 

300 subjects for the SER-109 safety database was reached in conjunction with a prior completed Phase 3 study, ECOSPOR III. To support a BLA 
submission, Seres is required by the FDA to provide safety data from at least 300 subjects who have received the proposed commercial dose, with a 24-
week follow-up period. The ECOSPOR IV open-label study includes patients with recurrent CDI, including individuals with a first recurrence of CDI. We 
intend to seek agreement with the FDA to begin a rolling BLA submission for SER-109 in the first half of 2022 and finalize the submission with data from 
the safety database in mid-2022. SER-109 has obtained Breakthrough Therapy designation, and as a result, we expect priority review by the FDA.

In November 2021, we initiated a SER-109 expanded access program across the United States. The program is designed to enable eligible adults 

with recurrent CDI to obtain access to SER-109 prior to a potential FDA product approval.

Sales and Marketing

13

If SER-109 is approved in the United States and Canada, we believe it can be commercialized with a focused specialty sales force that will target 

gastrointestinal and infectious disease physicians, which are the two primary groups of physicians who treat recurrent CDI patients. While preparing a BLA 
for submission, we have also initiated commercial readiness activities that include: C. difficile market assessments, publication and presentation planning, 
stakeholder and advocacy relationship mapping, brand name selection, and initiation of payer and reimbursement strategic planning.

In addition, in July 2021, we entered into an agreement with NHSc Pharma Partners, or, together with Société des Produits Nestlé S.A, Nestlé, to 
jointly commercialize SER-109 in the United States and Canada. Under the terms of the agreement, Nestlé will utilize its global pharmaceutical business 
Aimmune Therapeutics, Inc. and will assume the role of lead commercialization party. We received license payments of $175 million up front, and will 
receive an additional $125 million upon FDA approval of SER-109. The agreement also includes sales target milestones which, if achieved, could total up 
to $225 million. We will be responsible for development and pre-commercialization costs in the United States. Upon commercialization, we will be entitled 
to an amount equal to 50% of the commercial profits.

The agreement to co-commercialize SER-109 in the United States and Canada represents a second strategic collaboration between the companies. 
Nestlé already has commercial rights to our investigational treatments for CDI and IBD outside of the United States and Canada, and with the July 2021 
expansion, Nestlé became our global collaborator in SER-109. 

Infection Protection and SER-155 

We believe that the scientific and clinical data from our SER-109 program validate our novel approach of using microbiome therapeutics to 
decolonize pathogens, resulting in reduced rate of infections in medically compromised patients. Data from the SER-109 Phase 3 trial published in the New 
England Journal of Medicine show that microbiome therapeutics can restructure the gut microbiome and shift the gut metabolic landscape. Additional data 
show that SER-109 rapidly reduces the abundance of bacteria associated with common antibiotic resistance genes, or ARGs, and reduces ARG abundance 
in the gut. Collectively, these data demonstrate the potential for microbiome therapeutics to restore colonization resistance and ultimately to reduce 
infections and antimicrobial resistance. This approach, which we refer to as infection protection, may be replicable in protecting a range of medically 
compromised patients from infections seeded by the gut microbiome. It may also enable us to reduce antimicrobial resistant infections, which the World 
Health Organization declared as a top ten global public health threat facing humanity. 

We are evaluating SER-155 in a Phase 1b study in allo-HSCT recipients to reduce incidences of gastrointestinal infections, bloodstream infections 

and GvHD. We are also evaluating additional preclinical stage programs in indications such as cancer neutropenia, solid organ transplant, and antimicrobial 
resistant infections more broadly.

SER-155, an oral microbiome therapeutic candidate consisting of a consortium of cultivated bacteria, is designed to decrease infection and 

translocation of antibiotic resistant bacteria in the gastrointestinal tract and modulate host immune responses to decrease GvHD. The rationale for this 
program is based in part on published clinical evidence from our collaborators at Memorial Sloan Kettering Cancer Center showing that allo-HSCT patients 
with decreased diversity of commensal microbes are significantly more likely to die due to infection and/or lethal GvHD. SER-155 was designed using our 
reverse translational discovery platform to reduce incidences of gastrointestinal infections, bloodstream infections and GvHD in patients receiving allo-
HSCT. The SER-155 Phase 1b study is designed to include approximately 70 patients in both an open-label and a randomized, double-blind, placebo-
controlled cohort that will evaluate safety and tolerability before and after HSCT. Additionally, the engraftment of SER-155 bacteria (a measure of 
pharmacokinetics) and the efficacy of SER-155 in preventing infections and GvHD will be evaluated. In November 2021, we enrolled our first patient in 
the SER-155 Phase 1b study. 

Ulcerative Colitis, SER-287 and SER-301 

UC is a relapsing-remitting chronic inflammatory disorder affecting the mucosal surface of the colon, leading to episodes of bloody diarrhea, 

urgency and mucosal inflammation (Danese and Fiocchi, 2011), which generally begins in young adulthood and endures for life. As the disease mostly 
affects young and middle-aged individuals, a time of peak reproductive and economic productivity, the disease leads to decreased quality of life in those 
affected by the condition, high morbidity, and significant health economic burden. (Ghosh and Mitchell, 2007; Kappelman et al., 2008; Rubin et al., 2014; 
Theede et al., 2015) The incidence of UC is rising worldwide, and the prevalence of the disease is highest in the United States, Canada, and Europe. In the 
United States alone, the prevalence of UC in adults is estimated to be 263 per 100,000, while in the pediatric population (age <20 years), prevalence of the 
disease is estimated to be 33.9 per 100,000. (Kappelman et al., 2013) 

UC is characterized by recurring episodes of inflammation limited to the mucosal layer of the colon. The severity of symptoms, diarrhea associated 

with blood and abdominal pain, may range from mild disease to severe disease with more than 10 stools per day with severe cramps and continuous 
bleeding. The severity, extent, and duration of disease are also risk factors for developing colon cancer, which occurs at a rate as high as 0.5-1.0% per year, 
an important complication given the young age at which the disease strikes. Patients with UC also experience increased risk of CDI and primary sclerosing 
cholangitis, compared to the general population.

14

The pathogenesis of UC is unclear but thought to arise from an aberrant immune response to a change in the colonic environment in a genetically 

susceptible individual. The key features of UC include diffuse mucosal inflammation in a continuous pattern starting distally in the rectum to more 
proximal disease in the left colon to pancolitis. 

Symptoms of UC include rectal bleeding, tenesmus, increased stool frequency, urgency, incontinence, fever, fatigue and malaise, which negatively 

impact quality of life, physical and mental health and productivity. A subset of patients has extra-intestinal manifestations ranging from iron deficiency 
anemia to primary sclerosing cholangitis with implications for increased morbidity. In pediatric patients, the symptoms of UC have a more damaging 
impact, as they affect children’s growth and lead to delayed puberty. These patients also suffer from weight loss, anemia and joint symptoms and current 
therapy itself adversely impacts normal growth and development. (Kelsen et al., 2008). Treatment of UC with corticosteroids and immunosuppressive 
agents adds further medical complications to these vulnerable patients, including corticosteroid toxicity and increased risk of invasive infections and 
malignancy. Both environmental and genetic factors contribute to the etiology of the disease. Environmental factors may induce an ongoing immune 
response and inflammation in the genetically predisposed host. Efforts to identify specific environmental factors has implicated commensal bacteria or their 
products as key determinants of the inflammatory response in UC patients (Xavier et al., 2007). Thus, we believe SER-287 may target an “underlying 
cause” of UC rather than its symptoms.

Current and developing treatment alternatives and their limitations

Currently, patients with UC require life-long therapy. The goals of medical therapy are to induce and maintain clinical and endoscopic remission. 

Endoscopic remission is recognized as a key treatment goal since it better predicts short- and long-term clinical outcomes than symptomatic improvement 
alone. Attainment of these goals is generally associated with improved quality of life and decreased need for corticosteroids, and lower risk of 
hospitalization, colectomy, and colon cancer. 

Although the etiology of UC is not fully understood, much progress has been made in the understanding of pathogenesis. Under homeostatic 

conditions, there is a balance between pro-inflammatory and anti-inflammatory cytokine signals mediated by epithelial and immune cells in the 
gastrointestinal tract. However, UC is characterized by dysregulated mucosal immune responses and translocation of inflammatory mediators of 
microbiological origin across a disrupted gastrointestinal barrier that may cause or perpetuate inflammation leading to chronic inflammatory disease. 
Migration of innate and adaptive immune cells into gut mucosal tissues is potentiated by locally produced cytokines and chemokines, and by the expression 
of integrins that enhance cellular trafficking into the gut lamina propria. Inhibition of the immune response, via antibodies and proteins that sequester pro-
inflammatory cytokines or block the function of integrins, has been an important target of UC drug development over the past decade. 

Management of UC includes medications that decrease general inflammation (e.g., 5-aminosalicylate derivatives, or 5-ASA, corticosteroids) or 

dampen specific components of the host immune response (e.g., immunomodulators, inhibitors of tumor necrosis factor, anti-integrin antibodies). 

For mild-to-moderate disease, the 5-ASA derivatives are the standard of care for both induction and remission. 5-ASA derivatives achieve clinical 
remission in only 25-40% of patients during induction and approximately one-third of responders have disease flares during the first year of maintenance 
therapy, necessitating additional treatment interventions such as corticosteroids and immunomodulators (e.g. 6-mercaptopurine, methotrexate, 
azathioprine). Corticosteroids are not recommended by guideline panels for chronic therapy since these drugs are ineffective for maintaining remission and 
are associated with significant adverse events. Patients taking thiopurines require ongoing monitoring for hepatotoxicity, myelosuppression, and 
opportunistic infections, as well as counseling on the potential risk of lymphoma. 

Current medical therapies for the treatment of UC suppress the immune system rather than reduce the triggers of immune activation. We believe 

there remains an unmet need for safer agents with novel non-immunosuppressive mechanisms of action. Moreover, alternative therapy is needed for 
patients with mild-to-moderate UC who experience frequent flares or are intolerant to the aminosalicylate class of medication or where there are safety 
concerns relating to the use of immunomodulator or steroid therapy.

SER-287

Given the modulation of the microbiome seen in UC patients, studies have explored the use of FMT to treat UC. (Angelberger et al., 2013; Colman 

and Rubin, 2014; Kump et al., 2013; Kunde et al., 2013; Moayyedi et al., 2015; Paramsothy et al., 2017; Costello SP et al JAMA 2019).  Early reports of 
enhanced clinical remission and endoscopic improvement with repetitive FMT compared to placebo motivated the preclinical development and clinical 
testing of SER-287. 

SER-287, an oral microbiome therapeutic candidate consisting of a consortium of purified Firmicutes spores, is designed to restore a healthy 
gastrointestinal microbiome in individuals with UC. SER-287 has been granted Fast Track Designation by the FDA for the induction and maintenance of 
clinical remission in adult subjects with active mild-to-moderate UC. SER-287 has been designated an Orphan Drug for pediatric UC by the FDA.

Phase 1b clinical study design 

The Phase 1b clinical study was a multicenter, randomized, double-blind, placebo-controlled multiple dose study utilizing weekly or daily dosing 

with SER-287. We enrolled eligible subjects at approximately 20 sites in the United States. The Phase 1b 

15

clinical study was designed to enroll adults 18 years of age and older who had mild-to-moderate UC as defined by a Total Modified Mayo score between 4 
and 10, inclusive, with a modified Mayo endoscopic subscore ≥ 1, who were failing current therapies.

Patients were randomized to one of four study arms: 

•

•

•

•

Pre-conditioning with placebo for 6 days, followed by weekly dosing of SER-287 for 8 weeks

Pre-conditioning with placebo for 6 days, followed by daily dosing with placebo for 8 weeks

Pre-conditioning with vancomycin for 6 days, followed by daily dosing of SER-287 for 8 weeks

Pre-conditioning with vancomycin for 6 days, followed by weekly dosing of SER-287 for 8 weeks

The primary objectives of the study were to evaluate the safety and tolerability of SER-287 compared to placebo; to compare the baseline 
composition of the intestinal microbiome to the composition at 8 weeks post-initiation of SER-287 or placebo; and to determine the engraftment of SER-
287 bacteria into the intestinal microbial community in each of the SER-287 arms compared to the placebo arm.

The secondary objectives of the study were to determine the proportion of subjects in each of the treatment arms who at eight weeks post-initiation 
of treatment achieve a clinical response, complete remission, and endoscopic improvement; to assess changes in serum and fecal biomarkers from baseline 
throughout treatment; to determine the complement of metabolic pathways; and to compare the changes in exploratory biomarkers from mucosal biopsies 
and stool in each of the treatment arms from baseline through eight weeks.

This study was designed to provide evidence of safety of SER-287 compared to placebo for the UC population, describe the changes in the 

microbiome as a result of treatment with SER-287 and provide potential predictive biomarkers for future studies. UC is characterized by a decrease in 
microbial diversity and richness, with a lower prevalence of spore-forming organisms within the phylum Firmicutes. Preliminary data using repetitive 
enema FMT suggest that microbial interventions can affect clinical outcomes in UC, and this study evaluated whether the ecology of bacterial spores in 
SER-287 could correct the modulation of the microbiome in UC, increase microbial diversity and safely lead to a clinical response in UC patients with 
mild-to-moderate disease.

Phase 1b clinical study results  

Results were analyzed using the intent to treat, or ITT, “missing equals failure” analysis and the ITT “observed case” analysis methods.  The ITT 

“missing equals failure” analysis, included all 58 randomized subjects. For this analysis, incalculable clinical endpoints due to missing data, UC medication 
added due to UC flare during the treatment period and discontinuation from the trial prior to Day 48 were considered as not achieving the clinical endpoints 
(worst outcome).  However, if the end-of-trial endoscopy at Day 48, or later, was available, and the subject did not take additional UC medication due to 
UC flare, then the observed data was used to define success or failure for the subject. A period of 48 days of microbiome therapy was considered sufficient 
treatment to estimate the outcome of clinical endpoints and was prespecified. The ITT “observed case” analysis included 53 of 58 subjects randomized, 
excluding those who were missing their end-of-treatment endoscopies and used the observed data to define success or failure for each subject in the 
analysis. A paper titled “A Phase 1b Safety Study of SER-287, a Spore-Based Microbiome Therapeutic, For Active Mild-To-Moderate Ulcerative Colitis” 
was published as the highlighted over article in the January 2021 print edition of the leading journal Gastroenterology including data analysis from the 
Phase 1b trial of Ser-287 demonstrating that SER-287 administration was associated with positive impacts on clinical remission, endoscopic improvement, 
modulation of the gastrointestinal microbiome, and a favorable safety profile. 

Clinical efficacy results 

In the “missing equals failure” analysis, remission showed a statistically significant improvement in the vancomycin pre-conditioning / SER-287 

once-daily dosing arm as compared to the placebo/placebo daily arm: 40% (6 of 15 in SER-287) vs 0% (0 of 11 in placebo); change from placebo of 40.0% 
(95% confidence interval: 15.2%, 64.8%), (p-value, 0.0237). (See Figure 1).

16

The SER-287 weekly treatment arms also showed an improvement over placebo in both remission and endoscopic improvement but the effect was 

less than with the daily dosing regimen, showing a dose-response to SER-287 in these efficacy endpoints.  Addition of vancomycin to the SER-287 weekly 
dosing regimen did not clearly alter efficacy results, although we believe this may be due to the small size of the study.

Clinical response (data not shown), showed a numeric increase in the vancomycin/SER287 daily treatment arm compared to placebo but did not 

reach statistical significance.

Figure 1: 

SER-287 Phase 1b Clinical Study Efficacy Data – Missing Equals Failure

Legend: Δ = change from placebo; Remission was defined as a Total Modified Mayo score of less than or equal to 2, and an endoscopic sub-score of 

0 or 1; Endoscopic improvement was defined as a decrease in endoscopic sub score of greater than or equal to 1. Endoscopy measures were analyzed by a 
Central Reader.

Clinical Safety Results

The primary safety objective (short-term safety) was to evaluate the safety and tolerability of SER-287 in adults with active mild-to-moderate UC up 

to 92 days after randomization as determined by clinical and laboratory safety assessments. 

The treatment-emergent adverse events, or TEAEs, were balanced across all the treatment arms.  No drug-related serious adverse events, or SAEs, 

were reported.  All adverse events, or AEs, were considered mild to moderate in intensity.  Gastrointestinal, or GI, disorders had the greatest number of 
AEs compared to other system organ classes, with the most efficacious treatment arm (vancomycin/SER-287 daily) experiencing the lowest percentage of 
GI AEs. 

SER-287 was observed to be well-tolerated in all treatment arms, showing a safety profile consistent with the placebo arm.  The safety profile, when 

evaluating GI AEs, showed an improvement in the vancomycin/SER-287 treatment arm compared to vancomycin/placebo and the vancomycin/SER-287 
weekly treatment arms.  

A paper titled “A Phase 1b Safety Study of SER-287, a Spore-Based Microbiome Therapeutic, For Active Mild-To-Moderate Ulcerative Colitis” 

was published as the highlighted over article in the January 2021 print edition of the leading journal Gastroenterology including data analysis from the 
Phase 1b trial of Ser-287 demonstrating that SER-287 administration was associated with positive impacts on clinical remission, endoscopic improvement, 
modulation of the gastrointestinal microbiome, and a favorable tolerability profile

Microbiome results showed engraftment of SER-287-derived bacterial species in patients pre-conditioned with vancomycin who received SER-287. 

The degree of SER-287 engraftment, as measured by the number of detectable SER-287-derived bacterial species, increased in a dose-dependent manner, 
with daily dosing providing the most rapid and robust change in patients’ microbiome. Engraftment was maintained during the entire dosing period and 
was observed four weeks after the last dose of SER-287 was administered. Thus, engraftment was durable. Changes in the composition of the GI 
microbiome were associated with clinical remission and further associated with changes in stool metabolite and intestinal biopsy gene expression 
signatures associated with inflammation and immune modulation. Vancomycin pre-conditioning, as compared to placebo pre-conditioning, led to an 
immediate reduction of microbiome diversity followed by rapid and robust engraftment of SER-287-derived bacterial species. These data suggest that 
vancomycin pre-conditioning opens ecological niches for SER-287 engraftment in the human microbiome of patients with UC. 

Phase 2b clinical study design

The Phase 2b study, initiated in December 2018, was a three-arm placebo-controlled trial of approximately 200 patients with active mild-to-
moderate UC. Two groups of patients received different doses of SER-287, both following pre-conditioning with a short course of oral vancomycin. A third 
study arm received placebo. The study’s primary endpoint evaluated clinical remission measured after 10 weeks of SER-287 administration. Endoscopic 
improvement were measured as a secondary efficacy measure.

Phase 2b clinical study results 

17

 
 
 
In July 2021, we announced topline results from the Phase 2b study evaluating SER-287 in patients with mild-to-moderate UC.  The study did not 
meet its primary endpoint of improving clinical remission rates compared to placebo. The primary objective of the induction portion of the Phase 2b study 
was to evaluate the safety and efficacy of SER-287, after 10 weeks of induction dosing (following vancomycin pre-conditioning) in achieving clinical 
remission in participants with mild-to-moderate UC. The trial was a randomized, placebo controlled, double blind, parallel group multicenter study which 
enrolled 203 UC patients at approximately 100 sites throughout the U.S. and Canada.  Dosing was explored in two SER-287 cohorts (full induction dose 
and step-down induction dose) versus placebo and patients were randomized according to a 1:1:1 ratio. Clinical remission was analyzed and defined by a 3-
component modified Mayo Score.  No statistically significant differences were observed in absolute clinical remission rates between the three treatment 
arms (10.3% for the full induction dose, n=68 and 10.6% for the step-down induction dose, n=66 versus 11.6% for placebo, n=69). There were also no 
statistically significant differences observed across the three treatment groups for endoscopic improvement, endoscopic remission or symptomatic 
remission.

Both dosing regimens of SER-287 were generally well tolerated. Treatment emergent adverse events, or AEs, were observed in 67.6%, 46.2% and 

50.7% of subjects in the induction dose, step-down dose (both of which included six days of oral vancomycin preconditioning) and placebo treatment arms, 
respectively. The majority of observed AEs were mild or moderate in severity. The most commonly observed AEs were UC, diarrhea, nausea and 
abdominal distension. Four participants on active treatment reported serious treatment emergent adverse events (worsening UC, colonic dysplasia, 
congestive heart failure with decreased hemoglobin, and appendicitis), as did one on placebo (worsening UC).

Given the lack of a clinical efficacy signal identified in the Phase 2b study, we have closed the open label and maintenance portions of the study.  

In December 2021, we completed preliminary microbiome drug pharmacology analyses from the Phase 2b study that demonstrated the successful 
engraftment of SER-287 bacterial species. Based on the SER-287 Phase 2b microbiome data analyses, engraftment of SER-287 bacteria, measured as the 
median number of bacteria observed across patients post treatment, was statistically significant in patients receiving SER-287 versus placebo (p ≤ 0.001 at 
all timepoints). The magnitude and kinetics of engraftment were comparable to our Phase 1b study. However, unlike the Phase 1b study, anticipated 
changes in disease-relevant metabolites post-administration with SER-287 in the Phase 2b study were not observed. Analysis of the genomic and 
metabolomic data characterizing the microbiome of SER-287 study participants at baseline and post dosing suggest potential biomarkers for inclusion of 
targeted patient subpopulations in future development efforts. 

We continue to conduct analyses of data from our SER-287 and SER-301 clinical stage programs to inform next steps for further development. 

SER-301

SER-301 is an investigational, oral, microbiome therapeutic candidate comprised of a consortium of cultivated bacteria for the treatment of mild-to-

moderate UC. SER-301 is a consortium of cultivated bacteria designed using our reverse translational discovery platform that incorporates analysis of 
microbiome biomarkers from human clinical data and preclinical assessments using human cell-based assays and in vitro/ex vivo and in vivo disease 
models. SER-301 is formulated for oral delivery.  The design of SER-301 incorporates insights obtained from the SER-287 Phase 1b clinical and 
microbiome results, as well as from our clinical portfolio more broadly, and additional functional data from preclinical assessments, in an effort to optimize 
desired pharmacological properties.

SER-301 is designed to reduce induction of pro-inflammatory activity, improve epithelial barrier integrity and TNF-α driven inflammation in 
intestinal epithelial cells, or IECs, and modulate UC-relevant anti-inflammatory, innate and adaptive immune pathways.  SER-301 is being produced by our 
advanced fermentation, formulation and delivery platforms.  It includes strains delivered in spore form, as well as strains fermented in non-spore 
(vegetative) form and delivered using enterically-protected technology designed to release in the colon.

Phase 1b clinical study design 

The SER-301 Phase 1b study is being conducted in Australia and New Zealand in subjects with mild-to-moderate UC and is designed to include 

approximately 65 patients distributed across two cohorts. A first open-label cohort of 15 subjects evaluated safety, tolerability and pharmacokinetics (PK), 
as measured by bacterial engraftment. In the second cohort, 50 subjects will be randomized to receive either SER-301 or placebo, with a 3:2 randomization, 
respectively. The study utilizes an independent blinded central reader for the endoscopic component. The objectives for this cohort are to evaluate safety 
and PK, clinical remission, and other measures of drug pharmacology and efficacy will be evaluated as secondary endpoints. In November 2020, we 
enrolled the first patient in the SER-301 Phase 1b study.  

Phase 1b clinical study results - Cohort 1

We have completed preliminary analysis of data from the first cohort of the SER-301 Phase 1b study. Evaluation of the first cohort data by an 

independent Data Safety Monitoring Board indicated that it would be safe to proceed to the placebo-controlled second cohort. While efficacy was not a 
defined endpoint in the first cohort, evaluation of clinical outcome data collected as part of the study indicated that no subjects in the first cohort achieved 
clinical remission as defined by the FDA using the Three-Component 

18

Modified Mayo Score after 10 weeks of treatment, though there were improvements in one or more individual components (endoscopic, stool frequency 
and rectal bleeding subscores) in some patients. Strains in SER-301 were observed to engraft in subjects across the trial period with the number of 
engrafting strains exceeding expectations at multiple sampling time points. A dual formulation was evaluated in the first cohort and the extent of 
engraftment across subjects was correlated with whether bacteria were formulated as bacterial spores versus vegetative strains; the former demonstrating 
stronger engraftment across all patients.

Based on the assessment of metabolomic data, SER-301 demonstrated pharmacological properties consistent with its design and led to baseline-

dependent modulation of the metabolic landscape in the gastrointestinal tract of patients treated; changes were observed in short-chain and medium-chain 
fatty acids, tryptophan-derived metabolites, bile acids, and other microbe-associated metabolites, as well as host metabolites associated with a non-disease 
state. These SER-301 metabolomic results were encouraging compared with the results observed in the SER-287 Phase 2b study, in which the metabolic 
changes were not observed in general across subjects administered with SER-287. Additionally, changes in disease-relevant metabolites in SER-301 were 
observed to be greater in a definable subpopulation of patients. 

The degree of metabolic changes observed following SER-301 administration appeared to be dependent on the baseline metabolic profile of the 

study subjects, providing support for the potential for microbiome therapeutics to be developed in biomarker-identified UC patient subpopulations. 

We continue to conduct analyses of data from our SER-287 and SER-301 UC clinical stage programs to inform next steps for further development.

Other Programs

SER-401 

In March 2021, we announced that we, in collaboration with study partners, The Parker Institute for Cancer Immunotherapy and The University of 

Texas MD Anderson Cancer Center, voluntarily discontinued further enrollment of our study evaluating the safety and drug activity of SER-401 or fecal 
microbiota transplant, or FMT, in combination with nivolumab in patients with metastatic melanoma.

A preliminary analysis of results from 10 subjects who received either SER-401 or placebo in combination with nivolumab indicated that SER-401 

was generally well-tolerated. There were no patients enrolled in the FMT portion of the study. Subjects currently enrolled in the study will complete the 
study protocol. Given challenges in enrollment due to the COVID-19 pandemic, subsequent anticipated time to study completion, and progress in our 
preclinical oncology pipeline, we have decided to deprioritize further development of SER-401. We will continue to advance our research and development 
efforts in cancer, applying learnings from the SER-401 trial.

Donor-derived product candidates

Manufacturing

SER-109 is a purified consortium of Firmicute spores produced through a process of separation and purification from a natural human stool source, 
obtained from qualified, highly screened donors. The donor raw material is collected in a controlled setting, under a protocol that is designed to ensure that 
donors meet appropriate qualification criteria.

Donors are required to be in good health, and to possess a medical history that minimizes the risk of exposure to and transmission of an infectious 

disease. Donors are tested for infectious agents and screened for GI and other relevant health factors. Donors are monitored for health status changes on an 
ongoing basis throughout the donation period. At periodic intervals, and at the end of the donation period, the qualification assessment is repeated to help 
ensure the donor has maintained their health status. After successful completion of a periodic or exit screening, donations are released for use in 
manufacturing.

We initially process the donor material in our in-house Cambridge manufacturing facility, and then transfer the process intermediate to our partner 
CMO, GenIbet (acquired by Recipharm in February 2022), to further isolate and concentrate SER-109 for finishing to the oral capsule dosage form. The 
manufacturing process includes processes to inactivate and clear potential adventitious agents, to help ensure product safety. The purified drug substance is 
tested for identity, potency and purity, and subsequently formulated into drug product where it is again tested for identity, potency, purity, and 
pharmaceutical properties. The final drug product oral dosage form is four capsules daily for 3-days. Steps are specifically built into the process to remove 
and kill non-spore microbes. We have conducted validation studies demonstrating the ability of the process to inactivate and clear any potential extraneous 
pathogens of concern, and we believe we have sufficient data from these studies to support product registration. If approved, we anticipate that we will be 
able to produce a sufficient commercial supply of SER-109 to meet estimated demand in the United States using donations from a modest number of 
donors.

Commercial product supply for the initial phase of U.S. commercial launch is being produced at our Cambridge manufacturing facility and further 
processed at GenIbet. In November 2021, we entered into a collaboration with Bacthera to manufacture SER-109 to expand upon our existing capabilities 
for commercial product supply to meet anticipated demand in later years. Under the terms of 

19

the agreement, Bacthera will construct a dedicated full-scale production suite for us at Bacthera’s Microbiome Center of Excellence in Visp, Switzerland, 
which is currently under construction, and provide manufacturing services for SER-109. 

Cultivated product candidates

The production of live bacterial products is highly specialized. Owing to their hardiness and environmental persistence, production of aerobic and 

anaerobic vegetative bacteria, as well as spore-forming organisms, poses unique considerations for product, personnel, and facility design, operation, 
quality assurance and quality control. Manufacturing activities with spores are subject to specialized regulations. We expect that a typical commercial 
fermentation will yield on the order of hundreds or thousands of doses per liter depending on the product and its composition. Additionally, because a given 
total dose contains multiple strains, the per-strain requirements for production may be even lower. As a result, we believe the relatively high productivity of 
our manufacturing processes relative to the dose level will enable production scales for both clinical and commercial supply to be modest by traditional 
industry standards for biologics and vaccine manufacturing.

We have developed supply chains for producing and testing materials to ensure the availability of future clinical trial supplies. Our development 

processes are designed to ensure that the raw materials, process technologies and analytical tests we use are scalable and transferable to a cGMP 
manufacturing environment. These include the following core elements:

•

•

•

•

Fermentation. We are using microscale screening to optimize culture of the bacterial strains of interest in our current and foreseeable 
fermentation-based product candidates. These screens are designed to identify the fermentation platform that is best-suited for optimization 
and scale-up of the strains. Small-scale fermentation systems (0.1 L to 50 L) enable the optimization of a wide variety of culture conditions 
and have been demonstrated to be scalable to larger fermentation processes and enable technology transfer to clinical and final manufacturing 
sites. We employ platform fermentation processes as starting points for cGMP production processes and develop strain specific processes as 
required. To develop master cell banks, working cell banks, and bulk drug substance for commercial product, we are using bacterial strains 
that each originate from a unique research cell bank precursor, so we expect the research cell banks and final drug product should be 
genetically and physiologically similar.

Purification. Similar to fermentation, we believe small-scale purification operations are available for assessing large-scale cGMP 
manufacturing of live cells, and to quickly assess downstream process yield, quality and robustness. Our products in development are 
predominantly oral dosage forms containing live bacteria, hence purification is typically less complex than for parenteral biologics such as 
monoclonal antibodies that must separate highly similar components from the culturing process.  Separation of viable microbes from soluble 
fermentation broth components is typically much simpler by comparison.

Formulation. Our microbiome therapeutic candidates are combinations of bacteria and can be administered by a number of methods and by 
different routes. Where possible, our product formulation development is focused on oral delivery for patient convenience. The primary goal 
in developing a formulation is to deliver bacteria to the intended location in a condition where they are able to replicate and modulate the 
microbiome. Formulation development generally uses approved excipients and preservatives with pharmaceutical industry precedent, and 
will include screening of liquid, solid, and suspension formulations to maximize the opportunity for extended stability with minimal cold-
chain requirements.  Dosage forms for oral products may be liquid- or powder-filled capsules, tablets, sachets, or liquid containers. 

Analytical. We are addressing quality control requirements for our microbiome therapeutic candidates using proprietary microbiological, 
chemical, biochemical, and molecular sequence-based testing schemes. We have available and are further developing quality control, 
environmental monitoring and in-process analytical tools that can quantitatively measure the composition of spore, vegetative microbe and 
spore/vegetative combinations, which we believe enable a wide variety of drug products to be manufactured. Throughout the bioprocess and 
formulation development platform we use and will expand on quantitative analytics to assess the identity, potency and purity of the final 
product.

We currently have a 10,000 square foot cGMP manufacturing facility at our headquarters where we conduct cGMP manufacture of therapeutic 
candidates to support drug substance and drug product for early phase and small-scale clinical supplies and with the ability to perform both drug substance 
and drug product manufacturing for early and late-phase clinical development and at larger scales of operation. We may establish further manufacturing 
facilities that will serve late-phase clinical and commercial supply for our product candidates. We may do this by expanding our current facilities, or by 
purchasing or building additional facilities. We also use contract manufacturing and testing organizations to supplement our internal capacity. 

20

Collaboration and Manufacturing Agreements

Collaboration and License Agreement with Société des Produits Nestlé S.A. (Nestlé)

Material Agreements

In January 2016, we entered into the Collaboration and License Agreement, or the 2016 License Agreement, with Nestec, Ltd., which was 
succeeded in interest by Société des Produits Nestlé S.A., or together with NHSc Pharma Partners, Nestlé, for the development and commercialization of 
certain product candidates in development for the treatment and management of CDI and IBD, including UC and Crohn’s disease. The 2016 License 
Agreement will support the development of our portfolio of products for CDI and IBD in markets outside of the United States and Canada, or the 2016 
Licensed Territory. 

License Agreement with NHSc Pharma Partners (Nestlé)

In July 2021, we entered into a license agreement, or the 2021 License Agreement, with NHSc Pharma Partners, or, together with Société des 

Produits Nestlé S.A., Nestlé. Under the terms of the 2021 License Agreement, we granted Nestlé a co-exclusive, sublicensable (under certain 
circumstances) license to develop, commercialize and conduct medical affairs activities for (i) therapeutic products based on our microbiome technology 
(including our SER-109 product candidate) that are developed by us or on our behalf for the treatment of CDI and recurrent CDI, as well as any other 
indications pursued for the products upon mutual agreement of the parties, or the 2021 Field in the United States and Canada, or the 2021 Licensed 
Territory, and (ii) our SER-109 product candidate and any improvements and modifications thereto developed pursuant to the terms of the 2021 License 
Agreement, or the 2021 Collaboration Products for any indications in the 2021 Licensed Territory. We are responsible for completing development of SER-
109 in the 2021 Field in the United States until first regulatory approval for SER-109 is obtained. 

Bacthera Long Term Manufacturing Agreement

In November 2021, we entered into a Long Term Manufacturing Agreement, or the Bacthera Agreement, with BacThera AG, or Bacthera, a joint 

venture between Chr. Hansen and a Lonza Group affiliate.  The Bacthera Agreement governs the general terms under which Bacthera, or one of its 
affiliates, will (i) construct a dedicated full-scale production suite for us at Bacthera’s Microbiome Center of Excellence in Visp, Switzerland, which is 
currently under construction; and (ii) provide manufacturing services to us for our SER-109 product and, if agreed by the parties, SER-287 product.

AstraZeneca Research Collaboration and Option Agreement

In March 2019, we entered into a Research Collaboration and Option Agreement, or the Research Agreement, with MedImmune, LLC, a wholly 

owned subsidiary of AstraZeneca Inc., or AstraZeneca to conduct certain research and development activities with the goal of advancing the mechanistic 
understanding of the microbiome in augmenting the efficacy of cancer immunotherapy, including potential synergy with AstraZeneca compounds in 
accordance with a mutually agreed research plan. AstraZeneca bore all costs of conducting its activities under the Research Agreement and reimbursed us 
for certain of our costs incurred under the Research Agreement and paid us a total of $20.0 million in three equal installments, the first of which we 
received in April 2019, the second of which we received in December 2019 and third of which we received in January 2021. 

Indebtedness

Loan and Security Agreement with Hercules

In October 2019, we entered into a loan and security agreement with Hercules, pursuant to which a term loan in an aggregate principal amount of up 

to $50.0 million, or the Original Credit Facility, was available to us in three tranches. We received the first tranche of $25.0 million upon signing the 
agreement on October 29, 2019. We did not meet the milestone requirements for the second tranche under the Original Credit Facility, and as such, the 
additional amount up to $12.5 million is not available for us to borrow. We elected not to borrow the third tranche of $12.5 million, which was available 
upon Hercules’ approval until June 30, 2021.

In April 2020, we entered into an amendment to the loan and security agreement with Hercules, or the First Amendment, permitting us to enter into 

a promissory note under the Paycheck Protection Program of the Coronavirus Aid, Relief and Economic Stability Act. 

In February 2022, we entered into a second amendment to the loan and security agreement with Hercules, or the Second Amendment, which 
amended the Original Credit Facility. Pursuant to the Second Amendment, term loans in an aggregate principal amount of up to $100.0 million, or the New 
Credit Facility, have become available to us in five tranches subject to certain terms and conditions: (i) the first tranche in an aggregate principal amount of 
$25.0 million that is outstanding as of the February 24, 2022 effective date, or the Effective Date, (ii) the second tranche in an aggregate principal amount 
of $12.5 million that has been advanced to the Company and is outstanding as of the Effective Date, (iii) the third tranche in an aggregate principal amount 
of $12.5 million that has been advanced to the Company and is outstanding as of the Effective Date, (iv) the fourth tranche in an aggregate principal 
amount of $25.0 million available upon satisfaction of certain conditions, including the approval by the U.S. Food and Drug Administration of a biologics 
license application in respect of SER-109 by no later than December 15, 2023, and (v) the fifth tranche in an aggregate principal amount of up to $25.0 
million that is available through the amortization date upon satisfaction of certain conditions, including the lenders’ investment committee approval. 

21

For a further description of our material agreements, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations 

– Liquidity and Capital Resources" in Part II, Item 7 of this Annual Report on Form 10-K.

Intellectual Property

We strive to protect the proprietary technology that is important to our business, including seeking and, if granted, maintaining patents intended to 

cover our product candidates and compositions, their methods of use and processes for their manufacture and any other aspects of inventions that are 
commercially important to the development of our business. We also utilize regulatory exclusivity as well as trade secrets to protect aspects of our business.

We plan to continue to expand our intellectual property estate by filing patent applications directed to compositions, methods of treatment, methods 

of manufacture and methods for patient selection created or identified from our ongoing development of our product candidates. Our success will depend 
on our ability to obtain and maintain patent and other proprietary protection for commercially important technology, inventions and know-how related to 
our business, defend and enforce any patents that we may obtain, preserve the confidentiality of our trade secrets and operate without infringing the valid 
and enforceable patents and proprietary rights of third parties. We also rely on know-how and continuing technological innovation to develop and maintain 
our proprietary position and, in the future, may rely on or leverage in-licensing opportunities. We seek to obtain domestic and international patent 
protection, and endeavor to promptly file patent applications for new commercially valuable inventions.

The patent positions of biopharmaceutical companies like us are generally uncertain and involve complex legal, scientific and factual questions. In 
addition, the coverage claimed in a patent may be challenged in courts after issuance. Moreover, many jurisdictions permit third parties to challenge issued 
patents in administrative proceedings, which may result in further narrowing or even cancellation of patent claims. We cannot predict whether the patent 
applications we are currently pursuing will issue as patents in any particular jurisdiction or at all, whether the claims of any patent applications, should they 
issue, will cover our product candidates, or whether the claims of any issued patents will provide sufficient protection from competitors or otherwise 
provide any competitive advantage.

Because patent applications in the United States and certain other jurisdictions are maintained in secrecy for 18 months or potentially even longer, 
and because publication of discoveries in the scientific or patent literature often lags behind actual discoveries and patent application filings, we cannot be 
certain of the priority of inventions covered by pending patent applications. Accordingly, we may not have been the first to invent the subject matter 
disclosed in some of our patent applications or the first to file patent applications covering such subject matter, and we may have to participate in 
interference proceedings or derivation proceedings declared by the United States Patent and Trademark Office, or USPTO, to determine priority of 
invention.

Our patent portfolio includes issued U.S. patents and patent applications in various stages of prosecution, including ex-U.S. international 

counterparts. We believe that issued claims will provide protection for our microbiome therapeutic candidates.

Patent Term

The base term of a U.S. patent is 20 years from the filing date of the earliest-filed non-provisional, patent application from which the patent claims 

priority. The term of a U.S. patent can be lengthened by patent term adjustment, which compensates the owner of the patent for administrative delays at the 
USPTO. In some cases, the term of a U.S. patent is shortened by terminal disclaimer that reduces its term to that of an earlier-expiring patent.

The term of a U.S. patent may be eligible for patent term extension under the Drug Price Competition and Patent Term Restoration Act of 1984, 

referred to as the Hatch-Waxman Act, to account for at least some of the time the drug is under development and regulatory review after the patent is 
granted. With regard to a drug for which FDA approval is the first permitted marketing of the active ingredient, the Hatch-Waxman Act allows for 
extension of the term of one U.S. patent that includes at least one claim covering the composition of matter of such an FDA-approved drug, an FDA- 
approved method of treatment using the drug and/or a method of manufacturing the FDA-approved drug. The extended patent term cannot exceed the 
shorter of five years beyond the non-extended expiration of the patent or fourteen years from the date of the FDA approval of the drug, and a patent cannot 
be extended more than once or for more than a single product. During the period of extension, if granted, the scope of exclusivity is limited to the approved 
product for approved uses. Some foreign jurisdictions, including Europe and Japan, have analogous patent term extension provisions, which allow for 
extension of the term of a patent that covers a drug approved by the applicable foreign regulatory agency. In the future, if and when our product candidates 
receive FDA approval, we expect to apply, if appropriate, for patent term extension on patents covering those product candidates, their methods of use 
and/or methods of manufacture.

Trade Secrets

In addition to patents, we rely on trade secrets and know-how to develop and maintain our competitive position. We typically utilize trade secrets to 

protect aspects of our business. We protect trade secrets and know-how by establishing confidentiality agreements and invention assignment agreements 
with our employees, consultants, scientific advisors, contractors and collaborators. These agreements provide that all confidential information developed or 
made known during the course of an individual or entities’ relationship with us must be kept confidential during and after the relationship. These 
agreements also provide that all inventions 

22

resulting from work performed for us or relating to our business and conceived or completed during the period of employment or assignment, as applicable, 
shall be our exclusive property. In addition, we take other appropriate precautions, such as physical and technological security measures, to guard against 
misappropriation of our proprietary information by third parties.

Competition

The development and commercialization of new drug and biologic products is highly competitive and is characterized by rapid and substantial 

technological development and product innovations. We face competition with respect to our current product candidates and will face competition with 
respect to any product candidates that we may seek to develop or commercialize in the future from major pharmaceutical companies, specialty 
pharmaceutical companies and biotechnology companies worldwide. We are aware of a number of large pharmaceutical and biotechnology companies, as 
well as smaller, early-stage companies, that are pursuing the development of products, including microbiome therapeutics, and disease indications we are 
targeting. Potential competitors also include academic institutions, government agencies and other public and private research organizations that conduct 
research, seek patent protection and establish collaborative arrangements for research, development, manufacturing and commercialization.

Many of the companies against which we are competing or against which we may compete in the future have significantly greater financial 

resources, established presence in the market and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, 
obtaining regulatory approvals and marketing approved products than we do. Mergers and acquisitions in the pharmaceutical and biotechnology industries 
may result in even more resources being concentrated among a smaller number of our competitors.

These third parties compete with us in recruiting and retaining qualified scientific, clinical, manufacturing sales and marketing and management 

personnel, establishing clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, 
our programs.

The key competitive factors affecting the success of the product candidates that we develop, if approved, are likely to be their efficacy, safety, 

convenience, price, the level of competition and the availability of reimbursement from government and other third-party payors.

Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are more effective, have 

fewer or less severe side effects, are more convenient or are less expensive than any products that we may develop. Our competitors also may obtain FDA 
or other regulatory approval for their products more rapidly than we may obtain approval for ours, which could result in our competitors establishing a 
strong market position before we are able to enter the market, especially for any competitor developing a microbiome therapeutic which will likely share 
our same regulatory approval requirements. In addition, our ability to compete may be affected in many cases by insurers or other third-party payors 
seeking to encourage the use of lower cost products.

Government Regulation

The FDA and other regulatory authorities at federal, state and local levels, as well as in foreign countries, extensively regulate, among other things, 

the research, development, testing, manufacture, quality control, import, export, safety, effectiveness, labeling, packaging, storage, distribution, record 
keeping, approval, advertising, promotion, marketing, post-approval monitoring and post-approval reporting of drugs and biologics such as those we are 
developing. We, along with our contract manufacturers, will be required to navigate the various preclinical, clinical and commercial approval requirements 
of the governing regulatory authorities of the countries in which we wish to conduct studies or seek approval for our product candidates. The process of 
obtaining regulatory approvals and ensuring subsequent compliance with appropriate federal, state, local and foreign statutes and regulations requires the 
expenditure of substantial time and financial resources.

In the United States, the FDA regulates drug and biologic products under the Federal Food, Drug and Cosmetic Act, its implementing regulations 

and other laws, including, in the case of biologics, the Public Health Service Act. Our product candidates are subject to regulation by the FDA as biologics. 
Biologics require the submission of a BLA and approval by the FDA before being marketed in the United States. 

The process required by the FDA before our biologic product candidates may be marketed in the United States generally involves the following:

•

•

•

completion of preclinical laboratory tests and animal studies performed in accordance with the FDA’s good laboratory practice, or GLP, 
regulations;

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

approval by an institutional review board, or IRB, or ethics committee at each clinical site before a trial is commenced;

23

•

•

•

•

•

•

performance of adequate and well-controlled human clinical trials to establish the safety, purity and potency of the product candidate for each 
proposed indication, conducted in accordance with the FDA’s good clinical practice, or GCP, regulations;

preparation and submission to the FDA of a BLA after completion of all pivotal trials;

satisfactory completion of an FDA Advisory Committee review, if applicable;

determination by FDA within 60 days of its receipt of a BLA to file the application for review; 

satisfactory completion of an FDA inspection of the manufacturing facility or facilities at which the product is produced to assess compliance 
with cGMP regulations, and to assure that the facilities, methods and controls are adequate to preserve the biological product’s continued 
safety, purity and potency, and of selected clinical investigation sites to assess compliance with GCPs; and

FDA review and approval of the BLA prior to any commercial marketing, sale or shipment of the product.

The testing and approval process requires substantial time, effort and financial resources, and we cannot be certain that any approvals for our 

product candidates will be granted on a timely basis, if at all.

Preclinical and Clinical Trials

Once a product candidate is identified for development, it enters the preclinical testing stage. Preclinical studies include laboratory evaluations of 

drug chemistry, formulation and stability, as well as studies to evaluate toxicity in animals, which must be conducted in accordance with GLP requirements. 
The results of the preclinical studies, together with manufacturing information and analytical data, are submitted to the FDA as part of an IND. An IND is a 
request for authorization from the FDA to administer an investigational new drug to humans. An IND must become effective before human clinical trials 
may begin. The IND automatically becomes effective 30 days after receipt by the FDA, unless the FDA, within the 30-day time period, raises concerns or 
questions about the conduct of the clinical trial, including concerns that human research subjects will be exposed to unreasonable health risks. In such a 
case, the IND sponsor and the FDA must resolve any outstanding concerns before the clinical trial can begin. Submission of an IND may result in the FDA 
not allowing clinical trials to commence or not allowing clinical trials to commence on the terms originally specified in the IND. A separate submission to 
an existing IND must also be made for each successive clinical trial conducted during product development, and the FDA must grant permission, either 
explicitly or implicitly by not objecting, before each clinical trial can begin.

Clinical trials involve the administration of the product candidate to human subjects under the supervision of qualified investigators in accordance 

with GCPs, which include the requirement that all research subjects provide their informed consent for their participation in any clinical study. Clinical 
trials are conducted under protocols detailing, among other things, the objectives of the clinical trial and the parameters and criteria to be used in 
monitoring safety and evaluating effectiveness. Each protocol must be submitted to the FDA as part of the IND. While the IND is active, progress reports 
summarizing the results of the clinical trials and nonclinical studies performed since the last progress report, among other information, 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 
events, findings from other studies suggesting a significant risk to humans exposed to the drug, findings from animal or in vitro testing suggesting a 
significant risk to humans exposed to the drug, and any clinically important increased rate of a serious suspected adverse reaction compared to that listed in 
the protocol or investigator brochure.

An independent institutional review board, or IRB, for each investigator site proposing to participate in a clinical trial must also review and approve 

the clinical trial before it can begin at that site, and the IRB must monitor the clinical trial until it is completed. Some studies also include oversight by an 
independent group of qualified experts organized by the clinical study sponsor, known as a data safety monitoring board, which provides authorization for 
whether or not a study may move forward at designated check points based on access to certain data from the study and may halt the clinical trial if it 
determines that there is an unacceptable safety risk for subjects or other grounds, such as no demonstration of efficacy. The FDA, the IRB, or the sponsor 
may suspend or discontinue a clinical trial at any time on various grounds, including a finding that the subjects are being exposed to an unacceptable health 
risk. There are also requirements governing the reporting of ongoing clinical studies and clinical study results to public registries.

For purposes of BLA approval, clinical trials are typically conducted in three sequential phases, which may overlap or be combined.

•

•

Phase 1 — The investigational product is initially introduced into healthy human subjects or patients with the target disease or condition. 
These studies are typically designed to test the safety, dosage tolerance, absorption, metabolism and distribution of the investigational 
product in humans, the side effects associated with increasing doses, and, if possible, to gain early evidence on effectiveness.

Phase 2 — The investigational product is typically administered to a limited patient population with a specified disease or condition to 
evaluate the preliminary efficacy, optimal dosages and dosing schedule and to identify possible adverse side effects and safety risks.

24

•

Phase 3 — The investigational product is administered to an expanded patient population to further evaluate dosage, to provide statistically 
significant evidence of clinical efficacy and to further test for safety, generally at multiple geographically dispersed clinical trial sites. These 
clinical trials are intended to establish the overall risk/benefit ratio of the investigational product and to provide an adequate basis for product 
approval.

In some cases, the FDA may condition approval of a BLA on the sponsor’s agreement to conduct additional clinical trials to further assess the 

biologic’s safety and effectiveness after BLA approval. Such post-approval clinical trials are typically referred to as Phase 4 clinical trials.

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

chemistry and physical characteristics of the biologic and finalize a process for manufacturing the biologic in commercial quantities in accordance with 
cGMP requirements. The manufacturing process must be capable of consistently producing quality batches of the product candidate and manufacturers 
must develop, among other things, methods for testing the identity, strength, quality and purity of the final biological product. Additionally, appropriate 
packaging must be selected and tested, and stability studies must be conducted to demonstrate that the product candidate does not undergo unacceptable 
deterioration over its shelf life.

BLA Submission and FDA Review

The results of preclinical studies and clinical trials, together with other detailed information, including extensive manufacturing information and 

information on the composition of the biologic, are submitted to the FDA in the form of a BLA requesting approval to market the biologic for one or more 
specified indications. The BLA must include all relevant data available from preclinical and clinical studies, including negative or ambiguous results as 
well as positive findings, together with detailed information relating to the product’s chemistry, manufacturing, controls, and proposed labeling, among 
other things. Data can come from company-sponsored clinical studies intended to test the safety and effectiveness of a use of the product, or from a number 
of alternative sources, including studies initiated by independent investigators. The submission of a BLA requires payment of a substantial user fee unless a 
waiver is granted or exemption applies.

Each BLA submitted to the FDA is reviewed for administrative completeness and reviewability within 60 days of the FDA’s receipt of the 
application. If the BLA is found to be complete, the FDA will file the BLA, triggering a full review of the application. The FDA may refuse to file any 
BLA that it deems incomplete or not properly reviewable at the time of submission. In this event, the BLA must be resubmitted with the additional 
information.

Once a BLA has been accepted for filing, the FDA’s goal is to review standard applications within ten months after the filing date, or, if the 
application qualifies for priority review, six months after the FDA accepts the application for filing, but the overall timeframe is often extended by FDA 
requests for additional information or clarification. The FDA reviews a BLA to determine, among other things, whether the biological product is safe, pure 
and potent and whether the facility or facilities in which it is manufactured meet standards designed to assure the product’s continued safety, purity and 
potency. The FDA may also refer the application to an Advisory Committee for review, evaluation, and recommendation as to whether the application 
should be approved. The FDA is not bound by the recommendation of an advisory committee, but it generally follows such recommendations. 

Before approving a BLA, the FDA will inspect the facility or the facilities at which the biologic product is manufactured and will not approve the 
product unless it determines that the manufacturing processes and facilities are in compliance with cGMP and adequate to assure consistent production of 
the product within required specifications. Additionally, before approving a BLA, the FDA may inspect one or more clinical sites to assure that such trials 
were conducted in compliance with GCP. If the FDA determines that the application, manufacturing process or manufacturing facilities are not acceptable, 
it will outline the deficiencies in the submission and often will request additional testing or information. Notwithstanding the submission of any requested 
additional information, the FDA ultimately may decide that the application does not satisfy the regulatory criteria for approval.

After the FDA evaluates a BLA and conducts inspections of manufacturing facilities where the investigational product and/or its drug substance will 

be produced, the FDA may issue an approval letter or a Complete Response Letter, or CRL. An approval letter authorizes commercial marketing of the 
product with specific prescribing information for specific indications. A CRL will describe all of the deficiencies that the FDA has identified in the BLA, 
except that where the FDA determines that the data supporting the application are inadequate to support approval, the FDA may issue the CRL without first 
conducting required inspections, testing submitted product lots, and/or reviewing proposed labeling. In issuing the CRL, the FDA may recommend actions 
that the applicant might take to place the BLA in condition for approval, including requests for additional information or clarification. The FDA may delay 
or refuse approval of a BLA if applicable regulatory criteria are not satisfied, require additional testing or information, and/or require post-marketing 
testing and surveillance to monitor safety or efficacy of a product.

If regulatory approval of a product is granted, such approval will be granted for particular indications and may entail limitations on the indicated 

uses for which such product may be marketed. For example, the FDA may approve the BLA with a Risk Evaluation and Mitigation Strategy, or REMS, to 
ensure the benefits of the product outweigh its risks. A REMS is a safety strategy implemented to manage a known or potential serious risk associated with 
a product and to enable patients to have continued access to such medicines by managing their safe use, and could include medication guides, physician 
communication plans, or elements to assure 

25

safe use, such as restricted distribution methods, patient registries and other risk minimization tools. The FDA also may condition approval on, among 
other things, changes to proposed labeling or the development of adequate controls and specifications. Once approved, the FDA may withdraw the product 
approval if compliance with pre- and post-marketing requirements is not maintained or if problems occur after the product reaches the marketplace. The 
FDA may require one or more Phase 4 post-market studies and surveillance to further assess and monitor the product’s safety and effectiveness after 
commercialization and may limit further marketing of the product based on the results of these post-marketing studies.

Expedited Development and Review Programs

The FDA maintains several programs intended to facilitate and expedite development and review of new biologics designed to address unmet 
medical needs in the treatment of serious or life- threatening diseases or conditions. These programs include Fast Track designation, Breakthrough Therapy 
designation, Priority Review designation and Accelerated Approval, and the purpose of these programs is to expedite the development and review of 
qualifying product candidates. 

A new biologic is eligible for Fast Track designation if it is intended to treat a serious or life- threatening disease or condition and demonstrates the 
potential to address unmet medical needs for such disease or condition. Fast Track designation provides increased opportunities for sponsor meetings with 
the FDA during preclinical and clinical development, in addition to the potential for rolling review, meaning that the agency may review portions of the 
marketing application before the sponsor submits the complete application, if the sponsor provides a schedule for the submission of the sections of the 
BLA, the FDA agrees to accept sections of the BLA and determines that the schedule is acceptable, and the sponsor pays any required user fees upon 
submission of the first section of the BLA. Product candidates receiving Fast Track status may also be eligible for Priority Review, if the relevant criteria 
are met.

In addition, a biologic product candidate may be eligible for Breakthrough Therapy designation if it is intended to treat a serious or life-threatening 

disease or condition and preliminary clinical evidence indicates that the product candidate may demonstrate substantial improvement over existing 
therapies on one or more clinically significant endpoints, such as substantial treatment effects observed early in clinical development. Breakthrough 
Therapy designation provides all the features of Fast Track designation in addition to intensive guidance on an efficient development program beginning as 
early as Phase 1, and FDA organizational commitment to expedited development, including involvement of senior managers and experienced review staff 
in a cross-disciplinary review, where appropriate.

Any product candidate submitted to the FDA for approval, including a product candidate with Fast Track or Breakthrough Therapy designation, may 

also be eligible for additional FDA programs intended to expedite the review process, including Priority Review designation and accelerated approval. A 
BLA is eligible for Priority Review if the product candidate has the potential to provide a significant improvement in safety or effectiveness in the 
treatment, diagnosis or prevention of a serious disease or condition. Additionally, product candidates are eligible for accelerated approval if they can be 
shown to have an effect on a surrogate endpoint that is reasonably likely to predict clinical benefit, or an effect on a clinical endpoint that can be measured 
earlier than an effect on irreversible morbidity or mortality which is reasonably likely to predict an effect on irreversible morbidity or mortality or other 
clinical benefit, taking into account the severity, rarity, or prevalence of the condition and the availability or lack of alternative treatments. Accelerated 
approval is usually contingent on a sponsor’s agreement to conduct additional post-approval studies to verify and describe the product’s clinical benefit. 
Products receiving accelerated approval may be subject to expedited withdrawal procedures if the sponsor fails to conduct the required post-marketing 
studies or if such studies fail to verify the predicted clinical benefit. In addition, the FDA currently requires as a condition for accelerated approval pre-
approval of promotional materials, which could adversely impact the timing of the commercial launch of the product. 

Fast Track designation, Breakthrough Therapy designation, Priority Review designation and Accelerated Approval do not change the standards for 

approval but may expedite the development or review process. 

Post-Approval Requirements

Approved biologics that are manufactured or distributed in the United States are subject to pervasive and continuing regulation by the FDA, 
including, among other things, requirements relating to recordkeeping, periodic reporting, product distribution, advertising and promotion and reporting of 
adverse experiences with the product. There also are continuing, annual user fee requirements for products marketed pursuant to approved applications.

Any biologics manufactured or distributed pursuant to FDA approvals remain subject to continuing regulation by the FDA, including recordkeeping 

requirements and reporting of adverse experiences associated with the product. Manufacturers and their subcontractors are required to register their 
establishments with the FDA and certain state agencies and are subject to periodic unannounced inspections by the FDA and certain state agencies for 
compliance with ongoing regulatory requirements, including cGMP, which impose certain procedural and documentation requirements upon manufacturers 
and contract manufacturers. Changes to the manufacturing process are strictly regulated, and, depending on the significance of the change, may require 
prior FDA approval before being implemented. FDA regulations also require investigation and correction of any deviations from cGMP and impose 
reporting requirements. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality control to 
maintain compliance with cGMP and other aspects of regulatory compliance.

26

The FDA may withdraw approval if compliance with regulatory requirements and standards is not maintained or if problems occur after the product 

reaches the market. Later discovery of previously unknown problems with a product, including adverse events of unanticipated severity or frequency, or 
with manufacturing processes, or failure to comply with regulatory requirements, may result in revisions to the approved labeling to add new safety 
information, requirements for post-market studies or clinical trials to assess new safety risks, or imposition of distribution or other restrictions under a 
REMS programs. 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, untitled lets, or holds on clinical trials;

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

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

consent decrees, corporate integrity agreements, debarment or exclusion from federal healthcare programs;

mandated modification of promotional materials and labeling and the issuance of corrective information;

the issuance of safety alerts, Dear Healthcare Provider letters, press releases and other communications containing warnings or other safety 
information about the product; or

injunctions or the imposition of civil or criminal penalties.

The FDA closely regulates the post-approval marketing and promotion of biologics, including standards and regulations for direct-to-consumer 
advertising, off-label promotion, industry-sponsored scientific and educational activities, and promotional activities involving the internet and social media. 
A company can make only those claims relating to safety and efficacy that are approved by the FDA. Physicians may prescribe legally available biologics 
for uses that are not described in the product’s labeling and that differ from those tested by us and approved by the FDA. The FDA does not regulate the 
behavior of physicians in their choice of treatments. The FDA does, however, impose stringent restrictions on manufacturers’ communications regarding 
off-label use. Failure to comply with these requirements can result in adverse publicity, warning letters, corrective advertising and potential civil and 
criminal penalties.

Biosimilars and Regulatory Exclusivity

The Affordable Care Act, signed into law in 2010, includes a subtitle called the Biologics Price Competition and Innovation Act, or BPCIA, which 

created an abbreviated approval pathway for biological products that are biosimilar to or interchangeable with an FDA-licensed reference biological 
product. Biosimilarity, which requires that there be no clinically meaningful differences between the biological product and the reference product in terms 
of safety, purity, and potency, can be shown through analytical studies, animal studies, and a clinical study or studies. Interchangeability requires that a 
product is biosimilar to the reference product and the product must demonstrate that it can be expected to produce the same clinical results as the reference 
product in any given patient and, for products that are administered multiple times to an individual, the biologic and the reference biologic 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 biologic. 

Under the BPCIA, an application for a biosimilar product may not be submitted to the FDA until four years following the date that the reference 

product was first licensed by the FDA. In addition, the approval of a biosimilar product may not be made effective by the FDA until 12 years from the date 
on which the reference product was first licensed. During this 12-year period of exclusivity, another company may still market a competing version of the 
reference product if the FDA approves a full BLA for the competing product containing that applicant’s own preclinical data and data from adequate and 
well-controlled clinical trials to demonstrate the safety, purity and potency of its product. The BPCIA also created certain exclusivity periods for 
biosimilars approved as interchangeable products. At this juncture, it is unclear whether products deemed “interchangeable” by the FDA will, in fact, be 
readily substituted by pharmacies, which are governed by state pharmacy law.

A biological product can also obtain pediatric market exclusivity in the United States. Pediatric exclusivity, if granted, adds six months to existing 

exclusivity periods and patent terms. This six-month exclusivity, which runs from the end of other exclusivity protection or patent term, may be granted 
based on the voluntary completion of a pediatric study in accordance with an FDA-issued “Written Request” for such a study.

Orphan Drug Designation

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

disease or condition that affects fewer than 200,000 individuals in the United States, or if it affects more than 200,000 individuals in the United States, there 
is no reasonable expectation that the cost of developing and making the product available in the United States for the disease or condition will be recovered 
from sales of the product. Orphan designation must be 

27

requested before submitting a BLA. Orphan designation does not convey any advantage in or shorten the duration of the regulatory review and approval 
process, though companies developing orphan products are eligible for certain incentives, including tax credits for qualified clinical testing and waiver of 
application fees.

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

the product is entitled to a seven-year period of marketing exclusivity during which the FDA may not approve any other applications to market the same 
therapeutic agent for the same indication, except in limited circumstances, such as a subsequent product’s showing of clinical superiority over the product 
with orphan exclusivity or where the original applicant cannot produce sufficient quantities of product. Competitors, however, may receive approval of 
different therapeutic agents for the indication for which the orphan product has exclusivity or obtain approval for the same therapeutic agent for a different 
indication than that for which the orphan product has exclusivity. Further, if a designated orphan product receives marketing approval for an indication 
broader than the rare disease or condition for which it received orphan designation, it may not be entitled to orphan exclusivity.

Government Regulation Outside of the United States

To market any product outside of the United States, we would need to comply with numerous and varying regulatory requirements of other countries 
regarding safety and efficacy and governing, among other things, clinical trials, marketing authorization, manufacturing, commercial sales and distribution 
of our products. Because biologically sourced raw materials are subject to unique contamination risks, their use may be restricted in some countries. 
Whether or not we obtain FDA approval of a product, we must obtain the requisite approvals from regulatory authorities in foreign countries prior to the 
commencement of clinical studies or marketing of the product in those countries. The requirements and process governing the conduct of clinical studies, 
product licensing, pricing and reimbursement vary from country to country. Failure to comply with applicable foreign regulatory requirements, may be 
subject to, among other things, fines, suspension or withdrawal of regulatory approvals, product recalls, seizure of products, operating restrictions and 
criminal prosecution.

Non-clinical studies and clinical trials

Similarly to the United States, the various phases of non-clinical and clinical research in the European Union, or EU, are subject to significant 

regulatory controls.

Non-clinical studies are performed to demonstrate the health or environmental safety of new biological substances. Non-clinical studies must be 

conducted in compliance with the principles of good laboratory practice, or GLP, as set forth in EU Directive 2004/10/EC. In particular, non-clinical 
studies, both in vitro and in vivo, must be planned, performed, monitored, recorded, reported and archived in accordance with the GLP principles, which 
define a set of rules and criteria for a quality system for the organizational process and the conditions for non-clinical studies. These GLP standards reflect 
the Organization for Economic Co-operation and Development requirements.

Clinical trials of medicinal products in the EU must be conducted in accordance with EU and national regulations and the International Conference 
on Harmonization, or ICH, guidelines on Good Clinical Practices, or GCP, as well as the applicable regulatory requirements and the ethical principles that 
have their origin in the Declaration of Helsinki.  Additional GCP guidelines from the European Commission, focusing in particular on traceability, apply to 
clinical trials of advanced therapy medicinal products, or ATMPs. If the sponsor of the clinical trial is not established within the EU, it must appoint an EU 
entity to act as its legal representative. The sponsor must take out a clinical trial insurance policy, and in most EU countries, the sponsor is liable to provide 
‘no fault’ compensation to any study subject injured in the clinical trial.

The regulatory landscape related to clinical trials in the EU has been subject to recent changes. The EU Clinical Trials Regulation, or CTR, which 

was adopted in April 2014 and repeals the EU Clinical Trials Directive, became applicable on January 31, 2022. Unlike directives, the CTR is directly 
applicable in all EU member states without the need for member states to further implement it into national law. The CTR notably harmonizes the 
assessment and supervision processes for clinical trials throughout the EU via a Clinical Trials Information System, which contains a centralized EU portal 
and database. 

While the Clinical Trials Directive required a separate clinical trial application, or CTA, to be submitted in each member state, to both the competent 
national health authority and an independent ethics committee, much like the FDA and IRB respectively, the CTR introduces a centralized process and only 
requires the submission of a single application to all member states concerned. The CTR allows sponsors to make a single submission to both the 
competent authority and an ethics committee in each member state, leading to a single decision per member state. The CTA must include, among other 
things, a copy of the trial protocol and an investigational medicinal product dossier containing information about the manufacture and quality of the 
medicinal product under investigation. 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. Once the CTA is approved, clinical study development may 
proceed. 

The CTR foresees a three-year transition period. The extent to which ongoing and new clinical trials will be governed by the CTR varies. For 

clinical trials whose CTA was made under the Clinical Trials Directive before January 31, 2022, the Clinical Trials Directive will continue to apply on a 
transitional basis for three years. Additionally, sponsors may still choose to submit a CTA under 

28

either the Clinical Trials Directive or the CTR until January 31, 2023 and, if authorised, those will be governed by the Clinical Trials Directive until 
January 31, 2025. By that date, all ongoing trials will become subject to the provisions of the CTR.  

During the development of a medicinal product, the EMA and national regulators provide the opportunity for dialogue and guidance on the 
development program. At the EMA level, this is usually done in the form of scientific advice, which is given by the Scientific Advice Working Party of the 
Committee for Medicinal Products for Human Use, or CHMP. A fee is incurred with each scientific advice procedure. Advice from the EMA is typically 
provided based on questions concerning, for example, quality (chemistry, manufacturing and controls testing), nonclinical testing and clinical trials, and 
pharmacovigilance plans and risk-management programs. Advice is not legally binding with regard to any future marketing authorization application of the 
product concerned. 

Marketing Authorizations 

In the EU, medicinal products can only be placed on the market after obtaining a marketing authorization, or MA. To obtain regulatory approval of 

an investigational biological product in the EU, we must submit a marketing authorization application, or MAA. The process for doing this depends, among 
other things, on the nature of the medicinal product.

Centralized procedure—Under the centralized procedure, following the opining of the EMA’s Committee for Medicinal Products for Human Use, 
or, CHMP, the European Commission issues a single MA valid throughout the EU. The centralized procedure is compulsory for certain types of products, 
such as (i) medicinal products derived from biotechnology processes, such as genetic engineering, (ii) designated orphan medicinal products, (iii) ATMPs, 
such as gene therapy, somatic cell therapy and tissue engineered products, and (iv) medicinal products that contain a new active substance indicated for the 
treatment of certain diseases, such as HIV/AIDS, cancer, neurodegenerative diseases, diabetes, autoimmune diseases and other immune dysfunctions, and 
viral diseases. The centralized procedure is optional for any products containing a new active substance not yet authorized in the EU, or for products that 
constitute a significant therapeutic, scientific or technical innovation or for which the granting of a MA would be in the interest of public health in the EU.

Under the centralized procedure the maximum timeframe for the evaluation of an MAA by the EMA's CHMP 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 CHMP. At the end of the review period, 
the CHMP provides an opinion to the European Commission. If this opinion is favorable, the Commission may then adopt a decision to grant an MA. In 
exceptional cases, the CHMP might perform an accelerated review of a MAA in no more than 150 days (excluding clock stops), when a medicinal product 
targets an unmet medical need and is expected to be of a major public health interest, particularly from the point of view of therapeutic innovation. The 
timeframe for the evaluation of an MAA under the accelerated assessment procedure is 150 days, excluding clock stops.  

Innovative products that target an unmet medical need and are expected to be of major public health interest may be eligible for a number of 
expedited development and review programs, such as the PRIME scheme, which provides incentives similar to the breakthrough therapy designation in the 
U.S. In March 2016, the EMA launched an initiative, the Priority Medicines, or PRIME, scheme, a voluntary scheme aimed at enhancing the EMA’s 
support for the development of medicines that target unmet medical needs. It is based on increased interaction and early dialogue with companies 
developing promising medicines, to optimize their product development plans and speed up their evaluation to help them reach patients earlier. Product 
developers that benefit from PRIME designation can expect to be eligible for accelerated assessment but this is not guaranteed. 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 MAA assessment once a dossier has been submitted. 
Importantly, a dedicated contact and rapporteur from the CHMP is appointed early in the PRIME scheme facilitating increased understanding of the 
product at EMA’s committee level. An initial meeting initiates these relationships and includes a team of multidisciplinary experts at the EMA to provide 
guidance on the overall development and regulatory strategies.

National authorization procedures—There are also two other possible routes to authorize medicinal products in several member states, which are 

available for products that fall outside the scope of the centralized procedure:

•

•

Decentralized procedure. Using the decentralized procedure, an applicant may apply for simultaneous authorizations in more than one EU 
member states of medicinal products that have not yet been authorized in any EU member states and that do not fall within the mandatory 
scope of the centralized procedure. Under the decentralized procedure an identical dossier is submitted to the national competent authority of 
each of the member states in which the MA is sought, one of which is selected by the applicant as the reference member state. National MAs 
are issued by competent authorities of the EU member states for their respective territory.

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 member state. Following this, further MAs can be sought from other EU member states in a procedure 
whereby the countries concerned recognize the validity of the original national MA.

29

MAs have an initial duration of five years. After these five years, the authorization may be renewed on the basis of a reevaluation of the risk-benefit 
balance. Once renewed, the MA is valid for an unlimited period unless the European Commission or the national competent authority decides, on justified 
grounds relating to pharmacovigilance, to proceed with one additional five-year renewal.

Data and Marketing Exclusivity

In the EU, upon receiving a MA, reference medicinal products generally receive eight years of data exclusivity and an additional two years of 

market exclusivity. If granted, data exclusivity period prevents generic or biosimilar applicants from relying on the preclinical and clinical trial data 
contained in the dossier of the reference product when applying for a generic or biosimilar MA in the EU during a period of eight years from the date on 
which the reference product was first authorized in the EU. During the additional two-year period of the market exclusivity period a generic or biosimilar 
MA can be submitted, and the innovator’s data may be referenced but no generic or biosimilar can be marketed  in the EU until ten years have elapsed from 
the initial authorization of the reference product in the EU. The overall 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 MA 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. However, there is no 
guarantee that a product will be considered by the EU’s regulatory authorities to be a new chemical entity, and products may not qualify for data 
exclusivity.

There is a special regime for biosimilars, or biological medicinal products that are similar to a reference medicinal product but that do not meet the 
definition of a generic medicinal product, for example, because of differences in raw materials or manufacturing processes.  For such products, the results 
of appropriate preclinical or clinical trials must be provided, and guidelines from the EMA detail the type of quantity of supplementary data to be provided 
for different types of biological product. There are no such guidelines for complex biological products, such as gene or cell therapy medicinal products, and 
so it is unlikely that biosimilars of those products will currently be approved in the EU. However, guidance from the EMA states that they will be 
considered in the future in light of the scientific knowledge and regulatory experience gained at the time.

Orphan Medicinal Products

The criteria for designating an “orphan medicinal product” in the EU are similar in principle to those in the United States. A medicinal product may 

be designated as orphan if (1) it is intended for the diagnosis, prevention or treatment of a life-threatening or chronically debilitating condition; (2) either 
(a) such condition affects no more than five in 10,000 persons in the EU when the application is made, or (b) the product, without the benefits derived from 
orphan status, would not generate sufficient return in the EU to justify investment; and (3) there exists no satisfactory method of diagnosis, prevention or 
treatment of such condition authorized for marketing in the EU, or if such a method exists, the product will be of significant benefit to those affected by the 
condition. The application for orphan drug designation must be submitted before the MAA. Orphan medicinal products are eligible for financial incentives 
such as reduction of fees or fee waivers and are, upon grant of a MA, entitled to ten years of market exclusivity for the approved therapeutic indication. 
During this ten-year orphan market exclusivity period, the competent authorities cannot accept another MAA, or grant a MA, or accept an application to 
extend a MA for a similar product for the same indication. The period of market exclusivity is extended by two years for orphan medicinal products that 
have also complied with an agreed pediatric investigation plan, or PIP. No extension to any supplementary protection certificate can be granted on the basis 
of pediatric studies for orphan indications. Orphan drug designation does not convey any advantage in, or shorten the duration of, the regulatory review and 
approval process.

The ten-year market exclusivity 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, a MA 
may be granted to a similar product for the same indication at any time if (i) the second applicant can establish that its product, although similar, is safer, 
more effective or otherwise clinically superior; (ii) the applicant consents to a second orphan medicinal product application; or (iii) the applicant cannot 
supply enough orphan medicinal product.

Pediatric Development

In the EU, MAAs for new medicinal products have to include the results of trials conducted in the pediatric population, in compliance with a PIP 

agreed with the EMA’s Pediatric Committee, or PDCO. The PIP sets out the timing and measures proposed to generate data to support a pediatric 
indication of the drug for which an MA is being sought. The PDCO can grant a deferral of the obligation to implement some or all of the measures of the 
PIP until there are sufficient data to demonstrate the efficacy and safety of the product in adults. Further, the obligation to provide pediatric clinical trial 
data can be waived by the PDCO when these data are not needed or appropriate because the product is likely to be ineffective or unsafe in children, the 
disease or condition for which the product is intended occurs only in adult populations, or when the product does not represent a significant therapeutic 
benefit over existing treatments for pediatric patients. Once the MA is obtained in all member states and study results are included in the product 
information, even when negative, the product is eligible for a six-months supplementary protection certificate extension (if any is in effect at the time of 
approval) or, in the case of orphan pharmaceutical products, a two year extension of the orphan market exclusivity is granted.

30

Post-Approval Requirements

Similar to the United States, both MA holders and manufacturers of medicinal products are subject to comprehensive regulatory oversight by the 

EMA, the European Commission and/or the competent regulatory authorities of the member states. The holder of a MA must establish and maintain a 
pharmacovigilance system and appoint an individual qualified person for pharmacovigilance who is responsible for oversight of that system. Key 
obligations include expedited reporting of suspected serious adverse reactions and submission of periodic safety update reports, or PSURs.

All new MAAs must include a risk management plan, or RMP, describing the risk management system that the company will put in place and 

documenting measures to prevent or minimize the risks associated with the product. The regulatory authorities may also impose specific obligations as a 
condition of the MA. Such risk-minimization measures or post-authorization obligations may include additional safety monitoring, more frequent 
submission of PSURs, or the conduct of additional clinical trials or post-authorization safety studies.  

The advertising and promotion of medicinal products is also subject to laws concerning promotion of medicinal products, interactions with 
physicians, misleading and comparative advertising and unfair commercial practices. All advertising and promotional activities for the product must be 
consistent with the approved summary of product characteristics, and therefore all off-label promotion is prohibited. Direct-to-consumer advertising of 
prescription medicines is also prohibited in the EU. Although general requirements for advertising and promotion of medicinal products are established 
under EU directives, the details are governed by regulations in each member state and can differ from one country to another. 

Failure to comply with EU and member state laws that apply to the conduct of clinical trials, manufacturing approval, MA of medicinal products 

and marketing of such products, both before and after grant of the MA, manufacturing of pharmaceutical products, statutory health insurance, bribery and 
anti-corruption or with other applicable regulatory requirements may result in administrative, civil or criminal penalties. These penalties could include 
delays or refusal to authorize the conduct of clinical trials, or to grant MA, product withdrawals and recalls, product seizures, suspension, withdrawal or 
variation of the MA, total or partial suspension of production, distribution, manufacturing or clinical trials, operating restrictions, injunctions, suspension of 
licenses, fines and criminal penalties.

The aforementioned EU rules are generally applicable in the European Economic Area, or EEA (comprised of the 27 EU member states plus 

Iceland, Liechtenstein and Norway).

Brexit and the Regulatory Framework in the United Kingdom

The United Kingdom, or UK, left the EU on January 31, 2020, following which existing EU medicinal product legislation continued to apply in the 

UK during the transition period under the terms of the EU-UK Withdrawal Agreement. The transition period, which ended on December 31, 2020, 
maintained access to the EU single market and to the global trade deals negotiated by the EU on behalf of its members. The transition period provided time 
for the UK and EU to negotiate a framework for partnership for the future, which was then crystallized in the Trade and Cooperation Agreement, or TCA, 
and became effective on the January 1, 2021. The TCA includes specific provisions concerning pharmaceuticals, which include the mutual recognition of 
GMP inspections of manufacturing facilities for medicinal products and GMP documents issued, but does not foresee wholesale mutual recognition of UK 
and EU pharmaceutical regulations.

EU laws which have been transposed into UK law through secondary legislation continue to be applicable as “retained EU law”. However, new 
legislation such as the EU CTR or in relation to orphan medicines will not be applicable. The UK government has passed a new Medicines and Medical 
Devices Act 2021, which introduces delegated powers in favour of the Secretary of State or an ‘appropriate authority’ to amend or supplement existing 
regulations in the area of medicinal products and medical devices. This allows new rules to be introduced in the future by way of secondary legislation, 
which aims to allow flexibility in addressing regulatory gaps and future changes in the fields of human medicines, clinical trials and medical devices.

As of January 1, 2021, the Medicines and Healthcare products Regulatory Agency, or MHRA, is the UK’s standalone medicines and medical 
devices regulator. As a result of the Northern Ireland protocol, different rules will apply in Northern Ireland than in England, Wales, and Scotland, together, 
Great Britain, or GB; broadly, Northern Ireland will continue to follow the EU regulatory regime, but its national competent authority will remain the 
MHRA. The MHRA has published a guidance on how various aspects of the UK regulatory regime for medicines will operate in GB and in Northern 
Ireland following the expiry of the Brexit transition period on December 31, 2020. The guidance includes clinical trials, importing, exporting, and 
pharmacovigilance and is relevant to any business involved in the research, development, or commercialization of medicines in the UK. The new guidance 
was given effect via the Human Medicines Regulations (Amendment etc.) (EU Exit) Regulations 2019, or the Exit Regulations.

31

 
 
The MHRA has introduced changes to national licensing procedures, including procedures to prioritize access to new medicines that will benefit 

patients, including a 150-day assessment and a rolling review procedure. All existing EU MAs for centrally authorized products were automatically 
converted or grandfathered into UK MAs, effective in GB (only), free of charge on January 1, 2021, unless the MA holder chooses to opt-out. After Brexit, 
companies established in the UK cannot use the centralized procedure and instead must follow one of the UK national authorization procedures or one of 
the remaining post-Brexit international cooperation procedures to obtain an MA to commercialize products in the UK. The MHRA may rely on a decision 
taken by the European Commission on the approval of a new (centralized procedure) MA when determining an application for a GB authorization; or use 
the MHRA’s decentralized or mutual recognition procedures which enable MAs approved in EU member states (or Iceland, Liechtenstein, Norway) to be 
granted in GB.

Other Healthcare Laws

In addition to FDA restrictions on marketing of pharmaceutical and biological products, other healthcare regulatory laws restrict business practices 

in the biotechnology industry, which include, but are not limited to, anti-kickback, false claims, and transparency laws regarding drug pricing and payments 
and other transfers of value made to physicians and other healthcare providers. The federal Anti-Kickback Statute prohibits the offer, receipt, or payment of 
remuneration in exchange for or to induce the referral of patients or the use of products or services that would be paid for in whole or part by Medicare, 
Medicaid or other federal healthcare programs. Remuneration has been broadly interpreted to include anything of value, including cash, improper discounts 
and free or reduced-price items and services. Further, a person or entity does not need to have actual knowledge of the statute or specific intent to violate it 
to have committed a violation. Many states have similar laws that apply to their state healthcare programs as well as private payors.

The False Claims Act, or FCA, imposes liability on persons who, among other things, knowingly present or cause to be presented, a false, fictitious 

or fraudulent claim for payment to, or approval by, the federal government, knowingly make, use, or cause to be made or used a false record or statement 
material to a false or fraudulent claim to the federal government, or knowingly make a false statement to avoid, decrease or conceal an obligation to pay 
money to the U.S. federal government. The FCA has been used to prosecute persons submitting claims for payment that are inaccurate or fraudulent, that 
are for services not provided as claimed, or for services that are not medically necessary. In addition, the government may assert that a claim including 
items or services resulting from a violation of the Anti-Kickback Statute constitutes a false or fraudulent claim for purposes of the False Claims Act. 
Actions under the FCA may be brought by the Attorney General or as a qui tam action by a private individual in the name of the government. The federal 
government is using the FCA, and the accompanying threat of significant liability, in its investigation and prosecution of pharmaceutical and biotechnology 
companies throughout the country, and has obtained multi-million and multi–billion-dollar settlements under the FCA in addition to individual criminal 
convictions under applicable criminal statutes. In addition, companies have been forced to implement extensive corrective action plans and have often 
become subject to consent decrees or corporate integrity agreements, severely restricting the manner in which they conduct their business. Given the 
significant size of actual and potential settlements, it is expected that the government authorities will continue to devote substantial resources to 
investigating healthcare providers’ and manufacturers’ compliance with applicable fraud and abuse laws.

The federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, created additional federal criminal statutes that prohibit, among 

other actions, knowingly and willfully executing, or attempting to execute, a scheme to defraud any healthcare benefit program, including private third-
party payors, knowingly and willfully embezzling or stealing from a healthcare benefit program, willfully obstructing a criminal investigation of a 
healthcare offense, and knowingly and willfully falsifying, concealing or covering up a material fact or making any materially false, fictitious or fraudulent 
statement in connection with the delivery of or payment for healthcare benefits, items or services. Similar to the federal Anti-Kickback Statute, a person or 
entity does not need to have actual knowledge of the statute or specific intent to violate it in order to have committed a violation.

In addition, there has been a recent trend of increased federal and state regulation of payments made to physicians and other healthcare providers. 

The ACA, among other things, imposed new reporting requirements through the Physician Payments Sunshine Act on certain manufacturers of drugs 
covered by a federal healthcare program for payments made by them to physicians (defined to include doctors, dentists, optometrists, podiatrists and 
chiropractors), certain non-physician practitioners (physician assistants, nurse practitioners, clinical nurse specialists, certified registered nurse anesthetists, 
anesthesiology assistants, and certified nurse midwives)  and teaching hospitals, as well as ownership and investment interests held by physicians and their 
immediate family members. Failure to submit required information may result in civil monetary penalties for all payments, transfers of value or ownership 
or investment interests that are not timely, accurately and completely reported in an annual submission. Manufacturers must submit reports by the 90th day 
of each calendar year. Certain states also mandate implementation of compliance programs, impose restrictions on drug manufacturer marketing practices 
and/or require the tracking and reporting of gifts, compensation and other remuneration to physicians, and pricing information and marketing expenditures.

32

To the extent that any of our product candidates, once approved, are sold in a foreign country, we may be subject to similar foreign laws and 
regulations, which may include, for instance, applicable post-marketing requirements, including safety surveillance, anti-fraud and abuse laws, and 
implementation of corporate compliance programs and reporting of payments or other transfers of value to healthcare professionals.

The shifting commercial compliance environment and the need to build and maintain robust systems to comply with different compliance and/or 

reporting requirements in multiple jurisdictions increase the possibility that a healthcare company may violate one or more of the requirements. Violations 
of any of such laws or any other governmental regulations that apply to drug manufacturers may result in significant penalties, including, without 
limitation, administrative, civil and criminal penalties, damages, fines, disgorgement, the curtailment or restructuring of operations, exclusion from 
participation in federal and state healthcare programs, reporting obligations and integrity oversight, and imprisonment.

Coverage and Reimbursement

Significant uncertainty exists as to the coverage and reimbursement status of any product candidates for which we obtain regulatory approval. In 

both domestic and foreign markets, sales and reimbursement of any approved products will depend, in part, on the extent to which third-party payors, such 
as government health programs, commercial insurance and managed healthcare organizations provide coverage, and establish adequate reimbursement 
levels for, such products. Third-party payors are increasingly challenging the prices charged for medical products and services and imposing controls to 
manage costs. Third-party payors may limit, or hinder, coverage to specific products on an approved list, also known as a formulary, which might not 
include all of the FDA-approved products for a particular indication. Additionally, we may need to conduct expensive pharmacoeconomic studies in order 
to demonstrate the cost-effectiveness of our products, as well as provide rebates and discounts which may impact the net selling price of our products. If 
third-party payors do not consider our products to be cost-effective compared to other therapies, the payors may not cover our products as a benefit under 
their plans or, if they do, the level of reimbursement may not be sufficient to allow us to sell our products on a profitable basis.

The containment of healthcare costs also has become a priority of federal and state governments and the prices of pharmaceutical and biological 

products have been a focus in this effort. Governments have shown significant interest in implementing cost-containment programs, including price 
controls, restrictions on reimbursement and requirements for substitution of generic products. Adoption of price controls and cost-containment measures, 
and adoption of more restrictive policies in jurisdictions with existing controls and measures, could further limit our net revenue and results.

Outside the United States, ensuring adequate coverage and payment for our products will face challenges. Pricing of prescription pharmaceuticals is 

subject to governmental control in many countries. Pricing negotiations with governmental authorities can extend well beyond the receipt of regulatory 
marketing approval for a product and may require us to conduct a clinical trial that compares the cost effectiveness of our product candidates or products to 
other available therapies. Conducting such a clinical trial could be expensive and result in delays in our commercialization efforts. Third-party payors are 
challenging the prices charged for medical products and services, and many third-party payors limit reimbursement for newly approved healthcare 
products. Recent budgetary pressures in many countries are also causing governments to consider or implement various cost-containment measures, such as 
price freezes, increased price cuts and rebates. If budget pressures continue, governments may implement additional cost-containment measures. Cost-
control initiatives could decrease the price we might establish for products that we may develop or sell, which would result in lower product revenues or 
royalties payable to us. 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. The downward pressure on healthcare costs in general, particularly 
prescription products, has become very intense. As a result, increasingly high barriers are being erected to the entry of new products. In addition, in some 
countries, cross border imports from low priced markets exert a commercial pressure on pricing within a country.

Healthcare Reform

In the United States, there have been a number of federal and state proposals during the last few years regarding the pricing of pharmaceutical and 

biological products, government control and other changes to the healthcare system. It is uncertain what legislative proposals will be adopted or what 
actions federal, state or private payors for medical goods and services may take in response to any healthcare reform proposals or legislation. We cannot 
predict the effect medical or healthcare reforms may have on our business, and no assurance can be given that any such reforms will not have a material 
adverse effect.

By way of example, in March 2010, the ACA was signed into law, which, among other things, includes changes to the coverage and payment for 

pharmaceutical and biological products under government health care programs. Among other things, the ACA:

•

•

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

extended Medicaid drug rebates, previously due only on fee-for-service utilization, to Medicaid managed care utilization, and created an 
alternate rebate formula for new formulations of certain existing products that is intended to increase the amount of rebates due on those 
drugs;

33

•

•

expanded the types of entities eligible for the 340B drug discount program that mandates discounts to certain hospitals, community centers 
and other qualifying providers. With the exception of children’s hospitals, these newly eligible entities will not be eligible to receive 
discounted 340B pricing on orphan drugs. In addition, because 340B pricing is determined based on AMP and Medicaid drug rebate data, the 
revisions to the Medicaid rebate formula and AMP definition described above could cause the required 340B discounts to increase; and

established the Medicare Part D coverage gap discount program by requiring manufacturers to provide a 70% point-of-sale-discount off the 
negotiated price of applicable brand drugs to eligible beneficiaries during their coverage gap period as a condition for the manufacturers’ 
outpatient drugs to be covered under Medicare Part D.

Since its enactment, there have been judicial, executive and Congressional challenges to certain aspects of the ACA. On June 17, 2021, the U.S. 

Supreme Court dismissed the most recent judicial challenge to the ACA brought by several states without specifically ruling on the constitutionality of the 
ACA. Thus, the ACA will remain in effect in its current form. Further, prior to the U.S. Supreme Court ruling, President Biden issued an executive order to 
initiate a special enrollment period from February 15, 2021, through August 15, 2021, for purposes of obtaining health insurance coverage through the 
ACA marketplace. The executive order also instructed certain governmental agencies to review and reconsider their existing policies and rules that limit 
access to healthcare, including among others, reexamining Medicaid demonstration projects and waiver programs that include work requirements, and 
policies that create unnecessary barriers to obtaining access to health insurance coverage through Medicaid or the ACA. Other legislative changes have 
been proposed and adopted in the United States since the ACA was enacted. In For example, the Budget Control Act of 2011, enacted in August 2011, 
among other things, included reductions of Medicare payments to providers of 2% per fiscal year, which went into effect in April 2013 and, due to 
subsequent legislative amendments, will remain in effect through 2030, with the exception of a temporary suspension from May 1, 2020 through March 31, 
2022, unless additional Congressional action is taken. In January 2013, the American Taxpayer Relief Act of 2012 was signed into law, which, among other 
things, further reduced Medicare payments to several types of providers, including hospitals, and increased the statute of limitations period for the 
government to recover overpayments to providers from three to five years. More recently, there has been heightened governmental scrutiny over the 
manner in which manufacturers set prices for their marketed products, which have resulted in several Congressional inquiries and proposed and enacted 
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 pharmaceutical and biological products. Individual states in the United States 
have also become increasingly active in passing legislation and implementing regulations designed to control pharmaceutical product pricing, including 
price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and transparency measures, and, 
in some cases, designed to encourage importation from other countries and bulk purchasing. Adoption of other new legislation at the federal or state level 
could further limit reimbursement for pharmaceuticals, including our product candidates if approved.

Data Privacy and Security 

We may also be subject to U.S. federal and state and foreign health information privacy, security and data breach notification laws governing the 

collection, use, disclosure and protection of health-related and other personal information. In the U.S., HIPAA imposes privacy, security and breach 
reporting obligations with respect to individually identifiable health information upon “covered entities” (health plans, health care clearinghouses and 
certain health care providers), and their respective business associates, individuals or entities that create, received, maintain or transmit protected health 
information in connection with providing a service for or on behalf of a covered entity. HIPAA mandates the reporting of certain breaches of health 
information to the Department of Health and Human Services, or HHS, to affected individuals and if the breach is large enough, to the media. Entities that 
are found to be in violation of HIPAA as the result of a breach of unsecured protected health information, a complaint about privacy practices or an audit by 
HHS, may be subject to significant civil, criminal and administrative fines and penalties and/or additional reporting and oversight obligations if required to 
enter into a resolution agreement and corrective action plan with HHS to settle allegations of HIPAA non-compliance. Even when HIPAA does not apply, 
according to the Federal Trade Commission or the FTC, failing to take appropriate steps to keep consumers’ personal information secure may constitute 
unfair acts or practices in or affecting commerce in violation of Section 5(a) of the Federal Trade Commission Act. The FTC expects a company’s data 
security measures to be reasonable and appropriate in light of the sensitivity and volume of consumer information it holds, the size and complexity of its 
business, and the cost of available tools to improve security and reduce vulnerabilities. Individually identifiable health information is considered sensitive 
data that merits stronger safeguards. 

In addition, certain state laws govern the privacy and security of personal information, including health-related information in certain circumstances, 

some of which are more stringent than HIPAA and many of which differ from each other in significant ways and may not have the same effect, thus 
complicating compliance efforts. Failure to comply with these laws, where applicable, can result in the imposition of significant civil and/or criminal 
penalties and private litigation. For example, California enacted the California Consumer Privacy Act, or CCPA, which went into effect January 1, 2020. 
The CCPA, among other things, creates certain data privacy obligations for covered companies and provides individual privacy rights to California 
residents, including the right to opt out of certain disclosures of their information. The CCPA also creates a private right of action with statutory damages 
for certain data breaches, thereby potentially increasing costs associated with a data breach. Although the law includes limited exceptions, including for 
“protected health information” maintained by a covered entity or business associate, it may regulate or impact our 

34

processing of personal information depending on the context. Further, the California Privacy Rights Act, or CPRA, recently passed in California. The 
CPRA will impose additional data protection obligations on covered businesses, 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 will also create a new California data protection agency 
authorized to issue substantive regulations and could result in increased privacy and information security enforcement. The majority of the provisions will 
go into effect on January 1, 2023, and additional compliance investment and potential business process changes may be required.

In addition, certain foreign laws govern the privacy and security of personal data, including health-related data. For example, the EU General Data 
Protection Regulation, or GDPR, imposes strict requirements for processing the personal data of individuals within the EEA. Companies that must comply 
with the GDPR face increased compliance obligations and risk, including more robust regulatory enforcement of data protection requirements and potential 
fines for noncompliance of up to €20 million or 4% of the annual global revenues of the noncompliant company, whichever is greater. Further, from 
January 1, 2021, companies have had to comply with the GDPR and also the UK GDPR, which, together with the amended UK Data Protection Act 2018, 
retains the GDPR in UK national law. The UK GDPR mirrors the fines under the GDPR, i.e., fines up to the greater of €20 million (£17.5 million) or 4% of 
global turnover. Privacy and security laws, regulations, and other obligations are constantly evolving, may conflict with each other to complicate 
compliance efforts, and can result in investigations, proceedings, or actions that lead to significant civil and/or criminal penalties and restrictions on data 
processing.

Employees

Human Capital

As of December 31, 2021, we had 333 full-time permanent employees. Forty-four employees work in administration and operations and 289 work in 

research and development. None of our employees in the U.S. are represented by a labor union or covered by collective bargaining agreements, and we 
believe our relationship with our employees is good.  During 2021, we enhanced our capabilities by significantly expanding our employee base. The new 
employees were hired to support a variety of functions and key initiatives, including extending our research, clinical and pre-clinical pipeline development, 
as well as our medical affairs, manufacturing and commercialization capabilities, with hires in commercial, clinical development and operations, research, 
medical affairs, manufacturing, and general and administrative functions. We expect to continue to add additional employees in 2022, with a focus on 
further enhancing our capabilities and increasing our capacities in these areas as we continue our focus on gaining FDA approval for SER-109 for recurrent 
CDI.

Talent Acquisition and Development

We consider the intellectual capital, skills and experience of our employees to be an essential driver of our business and key to our future prospects. 
We face intense competition for qualified individuals from numerous pharmaceutical and biotechnology companies, universities, governmental entities and 
other research institutions, and we believe that our future success will depend in large part on our continued ability to attract and retain highly skilled 
employees. To attract qualified applicants to our company and retain our employees, we offer a total rewards package consisting of base salary and cash 
target bonus targeting the 50th  to 75th percentile of the market based on geography, a comprehensive benefit package and equity compensation for every 
employee. Annual cash bonus opportunity and equity compensation increase as a percentage of total compensation based on level of responsibility. Any 
actual bonus payout is based on a combination of individual performance and corporate performance

Diversity, Inclusion, and Belonging

As a microbiome therapeutics company developing a novel class of live biotherapeutic drugs, we believe that our long-term success and ability to 
deliver innovative, safe and effective medicines to patients requires a diverse and inclusive workforce. We value diversity at all levels of the organization 
and continue to focus on extending our diversity, equity and inclusion initiatives across our entire workforce, from: working with managers to develop 
strategies for building diverse, high performing teams; to ensuring that we attract, develop and retain diverse talent from all backgrounds; to increasing 
awareness within our company of unconscious biases, and supporting affinity groups comprised of individuals who are underrepresented in our company, 
industry or society, such as women, members of the LGBTQ community and people of color. In addition, we pride ourselves on an open culture that 
respects co-workers, values employees’ health and well-being and fosters professional development. We support employee growth and development in a 
variety of ways including with group training, individual mentoring and coaching, conference attendance and tuition reimbursement. Our management 
conducts annual employee engagement surveys and reports to our board of directors on human capital management topics, including corporate culture, 
diversity, equity and inclusion, employee development and retention, and compensation and benefits. Similarly, our board of directors regularly provides 
input on important decisions relating to these matters, including with respect to employee compensation and benefits, talent retention and development.

COVID-19 Pandemic 

We are operating at a unique time, as we face a serious public safety crisis because of the COVID-19 virus. We remain focused on continuing to 

serve clinical trial patients, as well as protecting the health and safety of our employees and the communities in which we live and work. At the onset of the 
COVID-19 pandemic, we activated a task force designed to assess, mitigate and manage 

35

the risks related to COVID-19 to avoid or minimize business disruption, including safeguarding of our facilities, and to ensure the safety and sense of 
security for our staff. In early March 2020, we closed all sites to non-essential employees. We continue to keep all our sites closed to non-essential 
employees and encourage remote working arrangements for employees, and we have adopted and implemented additional precautions to accommodate 
employees returning to worksites safely. To date, our remote working arrangements have not significantly affected our ability to maintain critical business 
operations.

Our Corporate Information

We were incorporated in the State of Delaware in 2010 under the name Newco LS21, Inc. In October 2011, we changed our name to Seres Health, 

Inc., and in May 2015, we changed our name to Seres Therapeutics, Inc. Our principal executive offices are located at 200 Sidney Street, Cambridge, 
Massachusetts 02139 and our telephone number is (617) 945-9626. Our website address is www.serestherapeutics.com. The information contained in, or 
accessible through, our website does not constitute a part of this Annual Report on Form 10-K.

We are subject to the informational requirements of the Securities Exchange Act of 1934, as amended, or the Exchange Act, and, accordingly, file 

reports, proxy statements and other information with the Securities and Exchange Commission, or SEC. The SEC maintains a web site 
(http://www.sec.gov) that contains material regarding issuers that file electronically, such as ourselves, with the SEC.

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

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

Item 1A. Risk Factors

Our business faces significant risks and uncertainties. Accordingly, in evaluating our business, you should carefully consider the risk factors 
discussed below, as well as the other information included or incorporated by reference in this Annual Report on Form 10-K, including our consolidated 
financial statements and the related notes and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.” The occurrence 
of any of the events or developments described below or elsewhere in this report could harm our business, financial condition, results of operations or 
growth prospects. 

Risks Related to Our Financial Position and Need for Additional Capital

We are a development-stage company and have incurred significant losses since our inception. We expect to incur losses for the foreseeable future and 
may never achieve or maintain profitability. 

Since inception, we have incurred significant operating losses. Our net loss was $65.6 million for the year ended December 31, 2021, $89.1 million 
for the year ended December 31, 2020, and $70.3 million for the year ended December 31, 2019. As of December 31, 2021, we had an accumulated deficit 
of $614.4 million. To date, we have financed our operations through the public offerings of our common stock, private placements of our common stock 
and preferred stock, payments under our collaboration agreements, and loan facility. We have devoted substantially all of our financial resources and efforts 
to developing our microbiome therapeutics platform, identifying potential product candidates and conducting preclinical studies and clinical trials. We have 
not completed development of any of our product candidates, which we call microbiome therapeutic candidates, or other drugs or biologics. We expect to 
continue to incur significant expenses and operating losses for the foreseeable future.  We anticipate that our expenses may increase substantially as we: 

•

•

•

•

•

complete the clinical development, seek regulatory approval, and prepare for potential commercialization of SER-109 for patients with 
recurrent CDI;

re-evaluate the clinical development of SER-287 for the treatment of UC in light of the Phase 2b clinical study results and in conjunction 
with the additional microbiome biomarker data; 

continue the clinical development of SER-301 for treatment of UC;

continue the clinical development of SER-155 to address gastrointestinal infections, bacteremia and graft-versus-host disease;

make strategic investments in our research discovery and development platforms and capabilities, including identifying candidates for 
additional disease indications;

36

 
•

•

•

•

•

•

make strategic investments in manufacturing capabilities;

maintain and augment our intellectual property portfolio and opportunistically acquire complementary intellectual property;

potentially establish a sales and distribution infrastructure and scale-up manufacturing capabilities to commercialize any products for which 
we may obtain regulatory approval;

perform our obligations under our agreements with our collaborators;

seek to obtain regulatory approvals for our product candidates; and

experience any delays or encounter any issues with any of the above, including but not limited to failed studies, complex results, safety issues 
or other regulatory challenges.

To become and remain profitable, we must succeed in developing and eventually commercializing products that generate significant revenue. This 

will require us to be successful in a range of challenging activities, including completing preclinical testing and clinical trials of our product candidates, 
discovering additional product candidates, obtaining regulatory approval for these product candidates and manufacturing, marketing and selling any 
products for which we may obtain regulatory approval. We are in the preliminary stages of many of these activities. We may never succeed in these 
activities and, even if we do, may never generate revenue that is significant enough to achieve profitability.

Because of the numerous risks and uncertainties associated with pharmaceutical product and biological development, we are unable to accurately 

predict the timing or amount of increased expenses or when, or if, we will be able 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 depress our value and could impair our ability to raise capital, expand our business, maintain our research and development efforts, 
diversify our product offerings or even continue our operations.

We will need additional funding in order to complete development of our product candidates and commercialize our products, if approved. If we are 
unable to raise capital when needed, we could be forced to delay, reduce or eliminate our product development programs or commercialization efforts.

Our expenses may increase in connection with our ongoing activities, particularly as we continue the clinical development of SER-109 and prepare 

for its potential commercialization pending regulatory approval, re-evaluate the clinical development of SER-287, continue clinical studies of SER-301 and 
SER-155 and continue to research, develop and initiate clinical trials of our other product candidates. In addition, if we obtain regulatory approval for any 
of our product candidates, we expect to incur significant commercialization expenses related to product manufacturing, marketing, sales and distribution, 
including under the 2021 License Agreement. Furthermore, we have incurred and expect to continue to incur additional costs associated with operating as a 
public company, including as a result of no longer qualifying as an “emerging growth company” as defined in the Jumpstart Our Business Startups Act of 
2012, or the JOBS Act, or as a "smaller reporting company."  Accordingly, we will need to obtain substantial additional funding in connection with our 
continuing operations. If we are unable to raise capital when needed or on attractive terms, we could be forced to delay, reduce or eliminate our research 
and development programs or any future commercialization efforts.

We expect that our cash, cash equivalents and investments as of December 31, 2021, including proceeds, net of facility fees and expenses, received 

in February 2022 in connection with the Second Amendment, will be sufficient to fund our operating expenses, debt service obligations and capital 
expenditure requirements for at least the next 12 months from the issuance of our consolidated financial statements included elsewhere in this Annual 
Report on Form 10-K. In addition, the specifics of existing and future clinical trial activities could impact capital requirements and cash projections. We 
have based this estimate on assumptions that may prove to be wrong, and we could use our capital resources sooner than we currently expect. Our future 
capital requirements will depend on many factors, including:

•

•

•

•

•

the impact of the COVID-19 pandemic;

the progress and results of our clinical studies;

the cost of manufacturing clinical supplies for our product candidates;

the scope, progress, results and costs of pre-clinical development, laboratory testing and clinical trials for our other product candidates;

the revenue, if any, received from commercial sales of our product candidates for which we receive marketing approval;

37

•

•

•

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

the effect of competing technological and market developments; and

the extent to which we acquire or invest in businesses, products and technologies, including entering into licensing or collaboration 
arrangements for product candidates.

Any additional fundraising efforts may divert our management from their day-to-day activities, which may adversely affect our ability to develop 

and commercialize our product candidates. In addition, we cannot guarantee that future financing will be available in sufficient amounts or on terms 
acceptable to us, if at all. Additionally, market volatility resulting from the COVID-19 pandemic or other factors could also adversely impact our ability to 
access capital as and when needed.  Moreover, the terms of any financing may adversely affect the holdings or the rights of our stockholders and the 
issuance of additional securities, whether equity or debt, by us, or the possibility of such issuance, may cause the market price of our shares to decline. The 
sale of additional equity or convertible securities would dilute all of our stockholders and may decrease our stock price. The incurrence of indebtedness 
could result in increased fixed payment obligations and we may be required to agree to certain restrictive covenants, such as limitations on our ability to 
incur additional debt, limitations on our ability to acquire, sell, or license intellectual property rights and other operating restrictions that could adversely 
impact our ability to conduct our business. We could also be required to seek funds through arrangements with collaborators or others at an earlier stage 
than otherwise would be desirable and we may be required to relinquish rights to some of our technologies or product candidates or otherwise agree to 
terms unfavorable to us, any of which may have a material adverse effect on our business, operating results and prospects.

If we are unable to obtain funding on a timely basis, we may be required to significantly curtail, delay, or discontinue one or more of our research or 

development programs or the commercialization of any product candidates, or be unable to expand our operations or otherwise capitalize on our business 
opportunities, as desired, which could materially affect our business, financial condition and results of operations.

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

Since our inception in October 2010, we have devoted substantially all of our resources to developing our clinical and preclinical program, building 
our intellectual property portfolio, developing our supply chain, planning our business, raising capital and providing general and administrative support for 
these operations.  We have not yet demonstrated our ability to obtain regulatory 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. Additionally, we expect our 
financial condition and operating results to continue to fluctuate significantly from quarter to quarter and year to year due to a variety of factors, many of 
which are beyond our control. Consequently, any predictions made about our future success or viability may not be as accurate as they could be if we had a 
longer operating history.

Risks Related to the Discovery, Development and Regulatory Approval of Our Product Candidates

Other than SER-109 and SER-287, we are early in our development efforts and may not be successful in our efforts to use our microbiome therapeutics 
platform to build a pipeline of product candidates and develop marketable drugs.

We are using our microbiome therapeutics platform to develop microbiome therapeutic candidates. Other than SER-109 and SER-287, we are at an 

early stage of development and our platform has not yet, and may never, lead to approvable or marketable drugs. We are developing additional product 
candidates that we intend to be used to reduce infection and treat diseases where the microbiome is implicated.  We may have problems applying our 
technologies to these areas, and our product candidates may not be effective in reducing infection and disease. Our product candidates may not be suitable 
for clinical development, including as a result of their harmful side effects, limited efficacy or other characteristics that indicate that they are unlikely to be 
products that will receive marketing approval and achieve market acceptance. 

The success of our product candidates will depend on several factors, including the following:

•

•

•

•

•

•

completion of preclinical studies and clinical trials with positive results;

receipt of marketing approvals from applicable regulatory authorities;

obtaining and maintaining patent and trade secret protection and regulatory exclusivity for our product candidates;

making arrangements with third-party manufacturers for, or establishing our own, commercial manufacturing capabilities;

launching commercial sales of our products, if and when approved, whether alone or in collaboration with others;

entering into new collaborations throughout the development process as appropriate, from preclinical studies through to commercialization;

38

•

•

•

•

•

•

•

acceptance of our products, if and when approved, by patients, the medical community and third-party payors;

effectively competing with other therapies;

obtaining and maintaining coverage and adequate reimbursement by third-party payors, including government payors, for our products, if 
approved;

protecting our rights in our intellectual property portfolio;

operating without infringing or violating the valid and enforceable patents or other intellectual property of third parties;

maintaining a continued acceptable safety profile of our products following approval; and

maintaining and growing an organization of scientists and business people who can develop and commercialize our products and technology.

If we or our collaborators do not successfully develop and commercialize product candidates we will not be able to obtain product revenue in future 

periods, which likely would result in significant harm to our financial position and adversely affect our stock price.

Our product candidates are based on microbiome therapeutics, which is an unproven approach to therapeutic intervention.

All of our product candidates are based on microbiome therapeutics, a novel potential class of live biotherapeutic drug candidates, which are 

consortia of microbes designed to treat or reduce disease by modulating the microbiome through key compositional and functional changes relevant to 
disease outcomes. We have not, nor to our knowledge has any other company, received regulatory approval for, or manufactured on a commercial scale, a 
therapeutic based on this approach. We cannot be certain that our approach will lead to the development of approvable or marketable products or that we 
will be able to manufacture at commercial scale, if approved. In addition, our microbiome therapeutic candidates may have different effectiveness rates in 
various indications and in different geographical areas. Finally, the FDA or other regulatory authorities may lack experience in evaluating the safety and 
efficacy of products based on microbiome therapeutics, 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 microbiome therapeutics platform relies on third parties for biological materials, including human stool. Some biological materials have not 

always met our expectations or requirements, and any disruption in the supply of these biological materials could materially adversely affect our business. 
For example, if any supplied biological materials are contaminated with disease organisms, we would not be able to use such biological materials. 
Although we have control processes and screening procedures, biological materials are susceptible to damage and contamination and may contain active 
pathogens. Improper storage of these materials, by us or any third-party suppliers, may require us to destroy some of our materials or products, which could 
delay the development or commercialization of our product candidates.

Clinical drug development involves a risky, lengthy and expensive process, with an uncertain outcome. We may incur additional costs or experience 
delays in completing, or ultimately be unable to complete, the development and commercialization of our product candidates.

It is difficult to predict when or if any of our product candidates will prove effective and safe in humans or will receive regulatory approval, and the 

risk of failure through the development process is high. Before obtaining marketing approval from regulatory authorities for the sale of any product 
candidate, we must complete preclinical development and then conduct extensive clinical trials to demonstrate the safety and efficacy of our product 
candidates in humans. Clinical testing is expensive, difficult to design and implement, can take many years to complete and is uncertain as to outcome. A 
failure of one or more clinical trials can occur at any stage of testing, and our clinical trials may not be successful. The outcome of preclinical testing and 
early clinical trials may not be predictive of the success of later clinical trials, and interim or preliminary results of a clinical trial, that we may from time to 
time announce, do not necessarily predict final results. A number of companies in the pharmaceutical and biotechnology industries have suffered 
significant setbacks in advanced clinical trials due to lack of efficacy or adverse safety profiles, notwithstanding promising results in earlier studies, and we 
cannot be certain that we will not face similar setbacks. 

In addition, we cannot be certain as to what type and how many clinical trials the FDA, or other regulatory authorities, will require us to conduct 

before we may successfully gain approval to market any of our other product candidates. Prior to approving a new therapeutic product, the FDA (or other 
regulatory authorities) generally requires that safety and efficacy be demonstrated in two adequate and well-controlled clinical trials. In some situations, 
evidence from a Phase 2 trial and a Phase 3 trial or from a single Phase 3 trial can be sufficient for FDA approval, such as in cases where the trial or trials 
provide highly reliable and statistically strong evidence of an important clinical benefit. 

39

We may experience numerous unforeseen events during, or as a result of, clinical trials that could delay or prevent our ability to receive marketing 

approval or commercialize our product candidates, including:

•

•

•

•

•

•

•

•

•

•

•

•

inability to generate sufficient preclinical, toxicology, or other in vivo or in vitro data to support the initiation or continuation of clinical trials;

regulatory authorities or institutional review boards may not authorize us or our investigators to commence a clinical trial or conduct a 
clinical trial at a prospective trial site;

failures or delays in reaching agreement on acceptable clinical trial contracts or clinical trial protocols with prospective trial sites;

clinical trials of our product candidates may demonstrate undesirable side effects or produce negative or inconclusive results, and we may 
decide, or regulators may require us, to conduct additional clinical trials or abandon product development programs;

the number of patients required for clinical trials of our product candidates may be larger than we anticipate, enrollment in these clinical trials 
may be slower than we anticipate or participants may drop out of these clinical trials at a higher rate than we anticipate;

our third-party contractors may fail to comply with regulatory requirements or meet their contractual obligations to us in a timely manner, or 
at all;

we may have to suspend or terminate clinical trials of our product candidates for various reasons, including a finding that the participants are 
being exposed to unacceptable health risks;

regulatory authorities or institutional review boards (or ethics committees) may require that we or our investigators suspend or terminate 
clinical research for various reasons, including noncompliance with regulatory requirements or a finding that the participants are being 
exposed to unacceptable health risks;

the cost of clinical trials of our product candidates may be greater than we anticipate;

the supply or quality of our product candidates or other materials necessary to conduct clinical trials of our product candidates may be 
insufficient or inadequate;

regulatory authorities may revise the requirements for approving our product candidates, or such requirements may not be as we anticipate; 
and

regarding trials managed by any current or future collaborators, our collaborators may face any of the above issues, and may conduct clinical 
trials in ways they view as advantageous to them but potentially suboptimal for us.

If we are required to conduct additional clinical trials or other testing of our product candidates beyond those that we currently contemplate, if we 

are unable to successfully complete clinical trials of our product candidates or other testing, if the results of these trials or tests are not positive or are only 
modestly positive or if there are safety concerns, we may:

•

•

•

•

•

•

•

•

•

be delayed in obtaining marketing approval for our product candidates;

lose the support of current or any future collaborators, requiring us to bear more of the burden of development of certain compounds;

not obtain marketing approval at all;

obtain marketing approval in some countries and not in others;

obtain approval for indications or patient populations that are not as broad as we intend or desire;

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

be subject to additional post-marketing testing requirements;

be subject to increased pricing pressure; or

have the product removed from the market after obtaining marketing approval.

40

For example, in March 2020, as a result of the COVID-19 pandemic, we halted further enrollment of the completed ECOSPOR III trial with 182 

patients enrolled. Following receipt of the Phase 3 top-line data from ECOSPOR III, the FDA reaffirmed its prior position that safety data from at least 300 
patients at 24 weeks will be required for the safety database for SER-109. In September 2021, we achieved target enrollment of 300 subjects with the 
ECOSPOR IV open-label study. The target enrollment of a minimum of 300 subjects for the SER-109 safety database was reached in conjunction with a 
prior completed Phase 3 study, ECOSPOR III. We may also be required to treat more patients with SER-109 than we currently expect before we are able to 
generate a safety database sufficient to allow us to seek approval of SER-109. Additional clinical trials or changes in our development plans could cause us 
to incur significant development costs, delay or prevent the commercialization of SER-109 or otherwise adversely affect our business. In addition, 
prolonged disruptions caused by the COVID-19 pandemic could severely impact our preclinical studies and clinical trials, including by causing further 
difficulties or delays in initiating, enrolling, conducting, or completing our planned and ongoing clinical trials. See “—Risks Related to Our Operations—
The COVID-19 pandemic has adversely impacted and could continue to adversely impact, our business, including our preclinical studies and clinical trials, 
results of operations and financial condition.”

Our product development costs will increase if we continue to experience delays in clinical testing or marketing approvals. We do not know whether 

any of our preclinical studies or clinical trials will begin as planned, will need to be restructured or will be completed on schedule, or at all. Significant 
preclinical or clinical trial delays also could shorten any periods during which we may have the exclusive right to commercialize our product candidates or 
allow our competitors to bring products to market before we do, potentially impairing our ability to successfully commercialize our product candidates and 
harming our business and results of operations.

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

clinical trials.  For instance, the regulatory landscape related to clinical trials in the European Union, or EU, recently evolved. The EU Clinical Trials 
Regulation, or CTR, which was adopted in April 2014 and repeals the EU Clinical Trials Directive, became applicable on January 31, 2022. While the 
Clinical Trials Directive required a separate clinical trial application, or CTA, to be submitted in each member state, to both the competent national health 
authority and an independent ethics committee, the CTR introduces a centralized process and only requires the submission of a single application to all 
member states concerned. The CTR allows sponsors to make a single submission to both 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. Once the CTA is approved, clinical study development 
may proceed. The CTR foresees a three-year transition period. The extent to which ongoing and new clinical trials will be governed by the CTR varies. For 
clinical trials whose CTA was made under the Clinical Trials Directive before January 31, 2022, the Clinical Trials Directive will continue to apply on a 
transitional basis for three years. Additionally, sponsors may still choose to submit a CTA under either the Clinical Trials Directive or the CTR until 
January 31, 2023 and, if authorised, those will be governed by the Clinical Trials Directive until January 31, 2025. By that date, all ongoing trials will 
become subject to the provisions of the CTR. Compliance with the CTR requirements by us and our third-party service providers, such as clinical research 
organizations, or CROs, may impact our developments plans.  

It is currently unclear to what extent the United Kingdom, or UK, will seek to align its regulations with the EU. The UK regulatory framework in 

relation to clinical trials is derived from existing EU legislation (as implemented into UK law, through secondary legislation). On January 17, 2022, the UK 
Medicines and Healthcare products Regulatory Agency, or MHR, launched an eight-week consultation on reframing the UK legislation for clinical trials. 
The consultation closes on March 14, 2022 and aims to streamline clinical trials approvals, enable innovation, enhance clinical trials transparency, enable 
greater risk proportionality, and promote patient and public involvement in clinical trials. The outcome of the consultation will be closely watched and will 
determine whether the UK chooses to align with the regulation or diverge from it to maintain regulatory flexibility. A decision by the UK not to closely 
align its regulations with the new approach that will be adopted in the EU may have an effect on the cost of conducting clinical trials in the UK as opposed 
to other countries and/or make it harder to seek a marketing authorization in the EU for our product candidates on the basis of clinical trials conducted in 
the UK.

If we are slow or unable to adapt to changes in existing requirements or the adoption of new requirements or policies governing clinical trials, our 

business may be impacted. 

Delays or difficulties in the enrollment of patients in clinical trials, could result in our receipt of necessary regulatory approvals being delayed or 
prevented.

Successful and timely completion of clinical trials will require that we enroll a sufficient number of patient candidates. These trials and other trials 
we conduct may be subject to delays for a variety of reasons, including as a result of patient enrollment taking longer than anticipated, patient withdrawal 
or adverse events. These types of developments could cause us to delay the trial or halt further development. 

Our clinical trials will compete with other clinical trials that are in the same therapeutic areas as our product candidates, and this competition 

reduces the number and types of patients available to us, as some patients who might have opted to enroll in our trials may instead opt to enroll in a trial 
being conducted by one of our competitors. Because the number of qualified clinical investigators 

41

and clinical trial sites is limited, we expect to conduct some of our clinical trials at the same clinical trial sites that some of our competitors use, which will 
reduce the number of patients who are available for our clinical trials at such clinical trial sites. In addition, there may be limited patient pools from which 
to draw for clinical studies. In addition to the rarity of some diseases, the eligibility criteria of our clinical studies will further limit the pool of available 
study participants as we will require that patients have specific characteristics that we can measure or to assure their disease is either severe enough or not 
too advanced to include them in a study.

Patient enrollment is also affected by other factors including:

•

•

•

•

•

•

•

•

•

•

•

the severity of the disease under investigation;

the patient eligibility criteria for the study in question;

the perceived risks and benefits of the product candidate under study;

the availability of other treatments for the disease under investigation, including the use of unapproved fecal microbiota transplant, or FMT, 
for CDI;

the existence of competing clinical trials;

the efforts to facilitate timely enrollment in clinical trials;

our payments for conducting clinical trials;

the patient referral practices of physicians;

the burden, or perceived burden, of the clinical study;

the ability to monitor patients adequately during and after treatment; and

the proximity and availability of clinical trial sites for prospective patients.

Our inability to enroll a sufficient number of patients for our clinical trials or a delayed rate of enrollment would result in significant delays and 

could require us to abandon one or more clinical trials altogether.  

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 the final data.

From time to time, we may publicly disclose interim, top-line or preliminary data from our 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 we previously published. As a result, top-line and preliminary data should be viewed with caution until the final data are available.  

From time to time, we may also disclose interim data from our preclinical studies and clinical trials. Interim data from clinical trials that we may 

complete are subject to the risk that one or more of the clinical outcomes may materially change as patient enrollment continues and more patient data 
become available. Adverse differences between interim data and final data could significantly harm our business prospects. Further, disclosure of interim 
data by us or by our competitors could result in volatility in the price of our common stock. 

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.

If we are not able to obtain, or if there are delays in obtaining, required regulatory approvals, we or our collaborators will not be able to commercialize 
our product candidates or will not be able to do so as soon as anticipated, and our ability to generate revenue will be materially impaired.

42

Our product candidates and the activities associated with their development and commercialization, including their design, testing, manufacture, 
safety, efficacy, recordkeeping, labeling, storage, approval, advertising, promotion, sale and distribution, are subject to comprehensive regulation by the 
FDA and other regulatory agencies in the United States and similar regulatory authorities outside the United States. Failure to obtain marketing approval 
for a product candidate in any jurisdiction will prevent us and our collaborators from commercializing the product candidate in that jurisdiction and may 
affect our plans for commercialization in other jurisdictions as well. We have not received approval to market any of our product candidates from 
regulatory authorities in any jurisdiction. We have only limited experience in filing and supporting the applications necessary to gain marketing approvals 
and expect to rely on third parties to assist us in this process. Securing marketing approval requires the submission of extensive preclinical and clinical data 
and supporting information to regulatory authorities for each therapeutic indication to establish the product candidate’s safety and efficacy. Securing 
marketing approval also requires the submission of information about the product manufacturing process to, and inspection of manufacturing facilities by, 
the regulatory authorities. Our product candidates may not be effective, may be only moderately effective or may prove to have undesirable or unintended 
side effects, toxicities or other characteristics that may preclude our obtaining marketing approval or prevent or limit commercial use.

The process of obtaining marketing approvals, both in the United States and abroad, is expensive, risky and may take many years. The scope and 

amount of clinical data required to obtain marketing approvals can vary substantially from jurisdiction to jurisdiction, and it may be difficult to predict 
whether a particular regulatory body will require additional or different studies than those conducted by a sponsor, especially for novel product candidates 
such as our microbiome therapeutic candidates. The FDA or foreign regulatory authorities may delay, limit, or deny approval to market our product 
candidates for many reasons, including: our inability to demonstrate that the clinical benefits of our product candidates outweigh any safety or other 
perceived risks; the regulatory authority’s disagreement with the interpretation of data from nonclinical or clinical studies; the regulatory authority’s 
requirement that we conduct additional preclinical studies and clinical trials; changes in marketing approval policies during the development period; 
changes in or the enactment of additional statutes or regulations, or changes in regulatory review process for each submitted product application; or the 
regulatory authority’s failure to approve the manufacturing processes or third-party manufacturers with which we contract. For instance, the EU 
pharmaceutical legislation is currently undergoing a complete review process, in the context of the Pharmaceutical Strategy for Europe initiative, launched 
by the European Commission in November 2020. A proposal for revision of several legislative instruments related to medicinal products (potentially 
revising the duration of regulatory exclusivity, eligibility for expedited pathways, etc.) is expected to be adopted by the European Commission by the end 
of 2022. The proposed revisions, once they are agreed and adopted by the European Parliament and European Council (not expected before the end of 
2024) may have a significant impact on the biopharmaceutical industry in the long term. 

There may also be interruptions or delays in the operations of the FDA or other foreign regulatory authorities due to the COVID-19 pandemic, 
which may impact approval timelines.  Regulatory authorities have substantial discretion in the approval process and may refuse to accept a marketing 
application if deficient. In addition, varying interpretations of the data obtained from preclinical and clinical testing could delay, limit or prevent marketing 
approval of a product candidate. Any marketing approval we ultimately obtain may be limited or subject to restrictions or post-approval commitments that 
render the approved product not commercially viable. Of the large number of drugs in development, only a small percentage successfully complete the 
FDA or other regulatory approval processes and are commercialized.

Furthermore, our product candidates may not receive marketing approval even if they achieve their specified endpoints in clinical trials. Clinical 

data is often susceptible to varying interpretations and many companies that have believed that their products performed satisfactorily in clinical trials have 
nonetheless failed to obtain regulatory authority approval for their products. The FDA or foreign regulatory authorities may disagree with our trial design 
and our interpretation of data from nonclinical and clinical studies, or they may require additional confirmatory or safety evidence beyond our existing 
clinical studies. Upon the FDA’s review of data from any pivotal trial, it may request that the sponsor conduct additional analyses of the data or gather more 
data and, if it believes the data are not satisfactory, could advise the sponsor to delay filing a marketing application.

Even if we eventually complete clinical testing and receive approval of a biologics license application, or BLA, or foreign marketing authorization 

for one of our product candidates, the FDA or the applicable foreign regulatory authority may grant approval contingent on the performance of costly 
additional clinical trials, which may be required after approval. The FDA or the applicable foreign regulatory authority may also approve our product 
candidates for a more limited indication and/or a narrower patient population than we originally request, and the FDA, or applicable foreign regulatory 
authority, may not approve the labeling that we believe is necessary or desirable for the successful commercialization of our product candidates. Any delay 
in obtaining, or inability to obtain, applicable regulatory approval would delay or prevent commercialization of our product candidates and would 
materially adversely impact our business and prospects.

The development of therapeutic products targeting the underlying biology of the human microbiome is an emerging field, and it is possible that the 

FDA and other regulatory authorities could issue regulations or new policies in the future that could adversely affect our microbiome therapeutic 
candidates.

If we experience delays in obtaining approval or if we fail to obtain approval of our product candidates, the commercial prospects for our product 

candidates may be harmed and our ability to generate revenues will be materially impaired.

43

A Fast Track designation by the FDA may not actually lead to a faster development or regulatory review or approval process. 

We may seek Fast Track designation for some of our product candidates. If a drug or biologic is intended for the treatment of a serious or life-

threatening condition and nonclinical or clinical data demonstrate the potential to address unmet medical needs for this condition, the drug or biologic 
sponsor may apply for Fast Track designation. SER-287 received Fast Track designation from the FDA for the induction and maintenance of clinical 
remission in adults with mild-to-moderate UC. Fast Track designation provides increased opportunities for sponsor meetings with the FDA during 
preclinical and clinical development, in addition to the potential for rolling review of a BLA for such product candidate. The FDA has broad discretion 
whether or not to grant this designation, and even if we believe another particular product candidate is eligible for this designation, we cannot be certain 
that the FDA would decide to grant it. Even with Fast Track designation, we may not experience a faster development process, review or approval 
compared to conventional FDA procedures. Fast Track designation does not assure ultimate approval by the FDA. The FDA may withdraw Fast Track 
designation if it believes that the designation is no longer supported by data from our clinical development program.

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

We have received Breakthrough Therapy designation for SER-109 for treatment of CDI, and we may seek a Breakthrough Therapy designation for 

our other product candidates. A Breakthrough Therapy is defined as a drug or biologic that is intended 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 in early clinical development. For drugs or biologics that have been 
designated as breakthrough therapies, interaction and communication between the FDA and the sponsor can help to identify the most efficient path for 
clinical development. Drugs designated as breakthrough therapies by the FDA are also eligible for rolling review of the associated marketing application.

Designation as a Breakthrough Therapy is within the discretion of the FDA. Accordingly, even if we believe one of our product candidates meets the 

criteria for designation as a Breakthrough Therapy, the FDA may disagree and instead determine not to make such designation. The receipt of a 
Breakthrough Therapy designation for a product candidate may not result in a faster development process, review or approval compared to conventional 
FDA procedures and does not assure ultimate approval by the FDA. In addition, not all products designated as breakthrough therapies ultimately will be 
shown to have the substantial improvement over available therapies suggested by the preliminary clinical evidence at the time of designation. As a result, if 
the Breakthrough Therapy designation for SER-109 or any future designation we receive is no longer supported by subsequent data, the FDA may rescind 
the designation.

We may seek PRIME designation by EMA or other designations, schemes or tools in the EU for one or more of our product candidates, which we may 
not receive. Such designations may not lead to a faster development or regulatory review or approval process and do not increase the likelihood that 
our product candidates will receive marketing authorization.

We may seek EMA PRIME (Priority Medicines) designation or other designations, schemes or tools for one or more of our product candidates. In 

the EU, innovative products that target an unmet medical need and are expected to be of major public health interest may be eligible for a number of 
expedited development and review programs, such as the PRIME scheme, which provides incentives similar to the Breakthrough Therapy designation in 
the United States. PRIME is a voluntary scheme aimed at enhancing the European Medicines Agency’s, or EMA, support for the development of medicines 
that target unmet medical needs. It is based on increased interaction and early dialogue with companies developing promising medicines, to optimize their 
product development plans and speed up their evaluation to help them reach patients earlier. The benefits of a PRIME designation include the appointment 
of a rapporteur before submission of a marketing authorization application, early dialogue and scientific advice at key development milestones, and the 
potential to qualify products for accelerated review earlier in the application process.

Even if we believe one of our product candidates is eligible for PRIME, the EMA may disagree and instead determine not to make such designation. 

The EMA PRIME scheme or other schemes, designations, or tools, even if obtained or used for any of our product candidates may not lead to a faster 
development, regulatory review or approval process compared to therapies considered for approval under conventional procedures and do not assure 
ultimate approval. In addition, even if one or more of our product candidates is eligible to the PRIME scheme, the EMA may later decide that such product 
candidates no longer meet the conditions for qualification or decide that the time period for review or approval will not be shortened.

44

Product developers that benefit from PRIME designation may be eligible for accelerated assessment (in 150 days instead of 210 days), which may 

be granted for medicinal products of major interest from a public health perspective or that target an unmet medical need, but this is not guaranteed. 

The competent regulatory authorities in the EU have broad discretion whether to grant such an accelerated assessment, and, even if such assessment 

is granted, we may not experience a faster development process, review or authorization compared to conventional procedures. Moreover, the removal or 
threat of removal of such an accelerated assessment may create uncertainty or delay in the clinical development of our product candidates and threaten the 
commercialization prospects of our products and product candidates, if approved. Such an occurrence could materially impact our business, financial 
condition and results of operations. 

We may seek orphan drug designation for some of our product candidates but may not be able to obtain it. 

We have obtained orphan drug designation from the FDA for SER-109 for recurrent CDI and SER-287 for pediatric UC and may seek orphan drug 

designation and exclusivity for some of our future product candidates. Regulatory authorities in some jurisdictions, including the United States and Europe, 
may designate drugs and biologics for relatively small patient populations as orphan drugs. In the United States, the FDA may designate a drug or biologic 
as an orphan drug if it is intended to treat a rare disease or condition, which is defined as a disease or condition that affects fewer than 200,000 individuals 
in the United States, or a patient population greater than 200,000 in the United States where there is no reasonable expectation that the cost of developing 
the drug will be recovered from sales in the United States. Orphan drug designation must be requested before submitting a BLA. In the United States, 
orphan drug designation entitles a party to financial incentives such as opportunities for grant funding towards clinical trial costs, tax advantages and 
application fee waivers. After the FDA grants orphan drug designation, the generic identity of the drug and its potential orphan use are disclosed publicly 
by the FDA.

In addition, if a product with an orphan drug designation subsequently receives the first marketing approval for the indication for which it has such 

designation, the product is entitled to a period of marketing exclusivity, which precludes the FDA or other regulatory authorities from approving another 
marketing application for the same drug or biologic for that time period, except in limited circumstances, such as a showing of clinical superiority over the 
product with orphan exclusivity or where the manufacturer is unable to assure sufficient product quantity for the orphan patient population. The applicable 
period is seven years in the United States and ten years in Europe. The European exclusivity period can be reduced to six years if, at the end of the fifth 
year, it is established that a product no longer meets the criteria for orphan drug designation or if the product is sufficiently profitable so that market 
exclusivity is no longer justified. Orphan drug exclusivity may be lost if the FDA or other regulatory authorities determine that the request for designation 
was materially defective or if the manufacturer is unable to assure a sufficient quantity of the drug or biologic to meet the needs of patients with the rare 
disease or condition. Exclusive marketing rights in the United States may also be unavailable if we or our collaborators seek approval for an indication 
broader than the orphan designated indication and may be lost if the FDA later determines that the request for designation was materially defective.

Even if we obtain orphan drug designation, we may not be the first to obtain marketing approval for any particular orphan indication due to the 

uncertainties associated with developing pharmaceutical products. Further, even if we obtain orphan drug exclusivity for a product candidate, that 
exclusivity for a product may not effectively protect the product from competition because different drugs and biologics can be approved for the same 
condition. Even after an orphan drug or biologic is approved, the FDA or other regulatory authorities can subsequently approve the same drug or biologic 
for the same condition if the FDA or other regulatory authorities conclude that the later drug is clinically superior in that it is shown to be safer, more 
effective or makes a major contribution to patient care. Orphan drug designation neither shortens the development time or regulatory review time nor gives 
the drug any advantage in the regulatory review or approval process.

Disruptions at the FDA and other government agencies caused by funding shortages or global health concerns could hinder their ability to hire, retain 
or deploy key leadership and other personnel, or otherwise prevent new or modified products from being developed, approved or commercialized in a 
timely manner or at all, which could negatively impact our business.

The ability of the FDA and other regulatory authorities to review and or approve new products can be affected by a variety of factors, including 

government budget and funding levels, statutory, regulatory, and policy changes, the FDA’s and other regulatory authorities' ability to hire and retain key 
personnel and accept the payment of user fees, and other events that may otherwise affect the FDA’s and other regulatory authorities' ability to perform 
routine functions. Average review times at the FDA have fluctuated in recent years as a result. In addition, government funding of other government 
agencies that fund research and development activities is subject to the political process, which is inherently fluid and unpredictable. Disruptions at the 
FDA and other regulatory authorities, such as the EMA, following its relocation to Amsterdam and resulting staff changes, may also slow the time 
necessary for new drugs and biologics to be reviewed and/or approved by necessary regulatory authorities, 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 authorities, such as the FDA, have had to 
furlough critical FDA employees and stop critical activities.  

45

 
 
Separately, in response to the COVID-19 pandemic, in March 2020, the FDA announced its intention to postpone most inspections of foreign 

manufacturing facilities, and on March 18, 2020, the FDA temporarily postponed routine surveillance inspections of domestic manufacturing facilities. 
Subsequently, in July 2020, the FDA resumed certain on-site inspections of domestic manufacturing facilities subject to a risk-based prioritization system. 
The FDA utilized this risk-based assessment system to assist in determining when and where it was safest to conduct prioritized domestic inspections. 
Additionally, on April 15, 2021, the FDA issued a guidance document in which the FDA described its plans to conduct voluntary remote interactive 
evaluations of certain drug manufacturing facilities and clinical research sites, among other facilities. According to the guidance, the FDA may request such 
remote interactive evaluations where the FDA determines that  remote evaluation would be appropriate based on mission needs and travel limitations. In 
May 2021, the FDA outlined a detailed plan to move toward a more consistent state of inspectional operations, and in July 2021, the FDA resumed 
standard inspectional operations of domestic facilities and was continuing to maintain this level of operation as of September 2021. More recently, the FDA 
has continued to monitor and implement changes to its inspectional activities to ensure the safety of its employees and those of the firms it regulates as it 
adapts to the evolving COVID-19 pandemic. Regulatory authorities outside the United States, including the EMA, have adopted similar restrictions or 
other policy measures in response to the COVID-19 pandemic. If a prolonged government shutdown occurs, or if global health concerns continue to 
prevent the FDA or other regulatory authorities from conducting their regular inspections, reviews, or other regulatory activities, it could significantly 
impact the ability of the FDA or other regulatory authorities to timely review and process our regulatory submissions, which could have a material adverse 
effect on our business.

Risks Related to our Dependence on Third Parties and Manufacturing

The collaboration and license agreements with Société des Produits Nestlé S.A. and NHSc Pharma Partners (collectively, and together with their 
affiliates and subsidiaries, Nestlé) are important to our business. If we or Nestlé fail to adequately perform under these agreements, or if we or Nestlé 
terminate the agreements, the development and commercialization of our CDI and IBD product candidates, including SER-109, SER-287 and SER-
301, could be delayed or terminated and our business would be adversely affected.

In January 2016, we entered into a Collaboration and License Agreement with Nestlé, or the 2016 License Agreement. The 2016 License Agreement 

may be terminated:

•

•

•

by Nestlé in the event of serious safety issues related to SER-109, SER-287, SER-301 or other specific products added under the 2016 
License Agreement, or, collectively, the 2016 Collaboration Products;

by us if Nestlé challenges the validity or enforceability of any of our licensed patents; and 

by either Nestlé or us in the event of the other party’s uncured material breach or insolvency. 

Upon termination of the 2016 License Agreement, all licenses granted to Nestlé by us will terminate, and all rights in and to the 2016 Collaboration 

Products held by Nestlé will revert to us. If we commit a material breach of the 2016 License Agreement, Nestlé may elect not to terminate the 2016 
License Agreement but instead apply specified adjustments to its payment obligations and other terms and conditions of the 2016 License Agreement. If 
Nestlé were to make such adjustments, the funding from and benefits of the 2016 License Agreement could be diminished, which could adversely affect 
our financial condition. Unless the 2016 License Agreement is terminated by us for Nestlé’s uncured material breach, upon termination of the 2016 License 
Agreement, Nestlé will be eligible to receive post-termination royalties from us until Nestlé has recouped certain development costs related to the 2016 
Collaboration Products and specified percentages of any milestone payments paid to us under the 2016 License Agreement prior to termination, which 
could have a material adverse effect on our business.

In July 2021, we entered into a License Agreement with Nestlé, or the 2021 License Agreement. The 2021 License Agreement may be terminated:

•

•

•

•

•

by Nestlé with twelve months’ prior written notice, effective only on or after the third anniversary of first commercial sale of our SER-109 
product and any improvements and modifications thereto developed pursuant to the terms of the 2021 License Agreement, or the 2021 
Collaboration Products;

by Nestlé if first commercial sale of the first 2021 Collaboration Product has not occurred by the fifth anniversary of the effective date of the 
2021 License Agreement, with 180 days’ prior written notice, which must be provided during a specified period set forth in the 2021 License 
Agreement;

by Nestlé if regulatory approval for SER-109 is not granted after submission by us of a filing seeking first regulatory approval as set forth in 
the development and regulatory activity plan, and the parties fail to agree on further development of SER-109 in accordance with the terms of 
the 2021 License Agreement, with 180 days’ prior written notice, which must be provided within a specified period set forth in the 2021 
License Agreement;

by us if Nestlé challenges the validity or enforceability of any of our licensed patents; and 

by either Nestlé or us in the event of the other party’s uncured material breach or insolvency. 

46

Upon termination of the 2021 License Agreement, all licenses granted to Nestlé by us will terminate. If we commit a material breach of the 2021 

License Agreement, Nestlé may elect not to terminate the 2021 License Agreement but instead apply specified adjustments to the payment terms and other 
terms and conditions of the agreement. If Nestlé were to make such adjustments, the funding from and benefits of the 2021 License Agreement could be 
diminished, which could adversely affect our financial condition. In the event we materially breach the 2021 License Agreement or file for bankruptcy, the 
share of profits and milestones due to us will be reduced by a specified percentage until Nestlé has recouped twice the losses caused by our material breach 
or bankruptcy.  

Termination of these agreements could cause significant delays in our product development and commercialization efforts that could prevent us 
from commercializing our CDI and IBD product candidates without first expanding our internal capabilities or entering into another agreement with a third 
party. Any alternative collaboration or license could also be on less favorable terms to us. In addition, under the agreements, Nestlé agreed to provide 
funding for certain clinical development activities. If either of the  agreements were terminated, we may need to refund those payments and seek additional 
financing to support the research and development of any terminated products or discontinue any terminated products, which could have a material adverse 
effect on our business.  

Under the collaboration and license agreements, we are dependent upon Nestlé to successfully commercialize any applicable collaboration products 

both outside and within the United States and Canada, as applicable. We cannot directly control Nestlé’s commercialization activities or the resources it 
allocates to our product candidates. Our interests and Nestlé’s interests may differ or conflict from time to time, or we may disagree with Nestlé’s level of 
effort or resource allocation. Nestlé may internally prioritize our product candidates differently than we do or it may not allocate sufficient resources to 
effectively or optimally commercialize them. If these events were to occur, our business would be adversely affected.

We rely, and expect to continue to rely, on third parties to conduct our clinical trials, and those third parties may not perform satisfactorily, including 
failing to meet deadlines for the completion of such trials.

We expect to continue to rely on third parties, such as CROs, clinical data management organizations, medical institutions and clinical investigators, 

to conduct and manage our clinical trials.

Our reliance on these third parties for research and development activities will reduce our control over these activities but does not relieve us of our 
responsibilities. For example, we remain responsible for ensuring that each of our clinical trials is conducted in accordance with the general investigational 
plan and protocols for the trial. Moreover, the FDA requires us to comply with regulatory standards, commonly referred to as good clinical practices, or 
GCPs, for conducting, recording and reporting the results of clinical trials to assure that data and reported results are credible and accurate and that the 
rights, safety and welfare of trial participants are protected. Regulatory authorities enforce these GCPs through periodic inspections of trial sponsors, 
principal investigators and trial sites. If we or any of these third parties or our CROs fail to comply with applicable GCPs, the clinical data generated in our 
clinical trials may be deemed unreliable and the FDA or comparable foreign regulatory authorities may require us to perform additional clinical trials 
before approving our marketing applications. We cannot assure you that upon inspection by a given regulatory authority, such regulatory authority will 
determine that any of our clinical trials comply with GCP regulations. In addition, our clinical trials must be conducted with product produced under cGMP 
regulations or similar regulatory requirements outside the United States. Our failure to comply with these regulations may require us to repeat clinical 
trials, which would delay the regulatory approval process. Moreover, our business may be adversely affected if any of these third parties violates federal or 
state fraud and abuse or false claims laws and regulations or healthcare privacy and security laws. Other countries’ regulatory authorities also have 
requirements for clinical trials with which we must comply. We also are required to register ongoing clinical trials and post the results of completed clinical 
trials on a government-sponsored database, ClinicalTrials.gov, within specified timeframes. Failure to do so can result in fines, adverse publicity and civil 
and criminal sanctions.

Furthermore, these third parties may also have relationships with other entities, some of which may be our competitors. If these third parties do not 

successfully carry out their contractual duties, do not meet expected deadlines, experience work stoppages, terminate their agreements with us or need to be 
replaced, or do not conduct our clinical trials in accordance with regulatory requirements or our stated protocols, we may need to enter into new 
arrangements with alternative third parties, which could be difficult, costly or impossible, and our clinical trials may be extended, delayed, or terminated or 
may need to be repeated. If any of the foregoing occur, we may not be able to obtain, or may be delayed in obtaining, marketing approvals for our product 
candidates and may not be able to, or may be delayed in our efforts to, successfully commercialize our product candidates.

47

We also expect to rely on other third parties to store and distribute drug supplies for our clinical trials. Any performance failure on the part of our 

distributors could delay clinical development or marketing approval of our product candidates or commercialization of our products, producing additional 
losses and depriving us of potential product revenue.

We rely on third parties for certain aspects of the manufacture of our product candidates for preclinical and clinical testing and for potential 
commercial manufacture, and we expect to continue to do so for the foreseeable future. This reliance on third parties increases the risk that we will not 
have sufficient quantities of our product candidates or that such quantities may not be available at an acceptable cost, which could delay, prevent or 
impair our development or commercialization efforts. 

We rely, and expect to continue to rely, on third parties, including Recipharm and Bacthera, for certain aspects of materials supply for our product 

candidates in preclinical and clinical testing, as well as for commercial manufacture if any of our product candidates receive marketing approval. This 
reliance on third parties increases the risk that we will not have sufficient quantities of our product candidates on a timely basis or at all, or that such 
quantities will be available at an acceptable cost or quality, which could delay, prevent or impair our development or commercialization efforts.  For 
example, certain of our product candidates rely on human stool from third-party donors.  If we do not obtain an adequate supply of donor-derived material 
to meet clinical or commercial demand, our ability to manufacture our product candidates may be delayed or adversely impacted.

We rely on third-party manufacturers, which entails additional risks, including:

•

•

•

•

•

•

•

failure of third-party manufacturers to comply with regulatory requirements and maintain quality assurance;

failure of third-party manufacturers to perform the manufacturing process adequately;

breach of supply agreements by the third-party manufacturers;

failure to supply components, intermediates, services, or product according to our specifications;

failure to supply components, intermediates, services, or product according to our schedule or at all;

misappropriation or disclosure of our proprietary information, including our trade secrets and know-how; and

termination or nonrenewal of agreements by third-party manufacturers at times that are costly or inconvenient for us.

Third-party manufacturers may not be able to comply with current good manufacturing processes, or cGMP, regulations or similar regulatory 

requirements inside or outside the United States. Our failure, or the failure of our third-party manufacturers, to comply with applicable regulations could 
result in sanctions being imposed on us, including clinical holds, fines, injunctions, civil penalties, delays, suspension or withdrawal of approvals, license 
revocations, seizures or recalls of product candidates or products, operating restrictions and criminal prosecutions, any of which could significantly and 
adversely affect supplies of our products. Some of the contract manufacturers we rely on to produce our product candidates have never produced an FDA-
approved therapeutic. One of the contract manufacturers on which we rely will be constructing a building in which to manufacture our product candidates, 
which may not be completed on time or at all or, upon completion, may not be approved by the FDA. If our manufacturers are unable to comply with 
cGMP regulation or similar regulatory requirements outside the United States or if the FDA or other regulatory authorities do not approve their facility 
upon a pre-approval inspection, our therapeutic candidates may not be approved or may be delayed in obtaining approval. In addition, there are a limited 
number of manufacturers that operate under cGMP regulations and similar regulatory requirements outside the United States that might be capable of 
manufacturing our products. Therefore, our product candidates and any future products that we may develop may compete with other products for access to 
manufacturing facilities. Any failure to gain access to these limited manufacturing facilities could severely impact the clinical development, marketing 
approval and commercialization of our product candidates.

Any performance failure on the part of our existing or future manufacturers could delay clinical development or marketing approval. We do not 

currently have a second source for certain required materials used for the manufacture of finished product. If our current manufacturers cannot perform as 
agreed, we may be required to replace such manufacturers and we may be unable to replace them on a timely basis or at all. Our current and anticipated 
future dependence upon others for the manufacture of our product candidates or products could delay, prevent or impair our development and 
commercialization efforts.  Moreover, as a result of the COVID-19 pandemic, third-party manufacturers may be affected, which could disrupt their 
activities and as a result we could face difficulty sourcing key components necessary to produce supply of our product candidates, which may negatively 
affect our preclinical and clinical development activities.

We have no experience manufacturing our product candidates commercially, and we cannot assure you that we can manufacture our product 
candidates in compliance with regulations at a cost or in quantities necessary to make them commercially viable.

We have manufacturing facilities at our Cambridge, Massachusetts locations where we conduct process development, scale-up activities and a 
portion of the manufacture of microbiome therapeutics. The FDA and other comparable foreign regulatory authorities must, pursuant to inspections that are 
conducted after submitting a BLA or relevant foreign marketing submission, confirm that the manufacturing processes for the product meet cGMP or 
similar regulatory requirements outside the United States. We have not yet had any of our manufacturing facilities inspected.

48

We currently intend to rely in part on third-party manufacturers for the commercial manufacturing of SER-109 and may establish a manufacturing 

facility for SER-109 or any of our other product candidates for production at a commercial scale. We have no experience in manufacturing sufficient 
volume of our product candidates to meet potential market demands. We may not be able to develop commercial-scale manufacturing facilities that are 
adequate to produce materials for commercial use.

The equipment and facilities employed in the manufacture of pharmaceuticals are subject to stringent qualification requirements by regulatory 

agencies, including validation of facility, equipment, systems, processes and analytics. We may be subject to lengthy delays and expense in conducting 
validation studies, if we can meet the requirements at all.

In addition, some of our product candidates require donor material, of which we may not be able to collect sufficient quantities for commercial-scale 

or other manufacturing. 

Risks Related to Commercialization of Our Product Candidates and

Other Legal Matters

Even if any of our product candidates receive marketing approval, it may fail to achieve the degree of market acceptance by physicians, patients, 
hospitals, third-party payors and others in the medical community necessary for commercial success.

If any of our product candidates receives marketing approval, it may nonetheless fail to gain sufficient market acceptance by physicians, patients, 

third-party payors and others in the medical community. For example, current CDI treatment involves the use of antibiotics that are well established in the 
medical community or the use of FMT, and physicians may continue to rely on these treatments and our competitors and physicians may continue to seek 
to standardize and implement this procedure.  If our product candidates receive approval but do not achieve an adequate level of acceptance, we or our 
collaborators may not generate significant product revenue and we may not become profitable. The degree of market acceptance of our approved product 
candidates, if any, will depend on a number of factors, including:

•

•

•

•

•

•

•

•

•

•

•

their efficacy, safety and other potential advantages compared to alternative treatments;

the clinical indications for which our products are approved;

our ability to offer them for sale at competitive prices;

their convenience and ease of administration compared to alternative treatments;

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

the strength of marketing and distribution support;

the availability of third-party coverage and adequate reimbursement for our product candidates;

the prevalence and severity of their side effects and their overall safety profiles;

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

interactions of our products with other medicines patients are taking; and

the ability of patients to take our products.

If we or our collaborators are unable to establish effective sales, marketing and distribution capabilities or enter into agreements with third parties with 
such capabilities, we or our collaborators may not be successful in commercializing our product candidates if and when they are approved.

We have employees with experience in sales and marketing, but we have limited sales or marketing infrastructure and, as a company, have no 

experience in the sale, marketing, or distribution of pharmaceutical products. To achieve commercial success for any product for which we obtain 
marketing approval, we will need to establish a sales and marketing organization or make arrangements with third parties to perform sales and marketing 
functions and we may not be successful in doing so.

In July 2021, we entered into the 2021 License Agreement with Nestlé, pursuant to which we granted Nestlé, under certain of our patent rights and 

know how, a co-exclusive, sublicensable (under certain conditions) license to develop, commercialize and conduct medical affairs activities for the 2021 
Collaboration Products in the United States and Canada. Under the 2021 License Agreement, Nestlé has the sole right to commercialize the 2021 
Collaboration Products in the 2021 Licensed Territory in accordance with a commercialization plan, subject to our right to elect to provide up to a specified 
percentage of all promotional details for a certain target audience. Each party will use commercially reasonable efforts to commercialize the 2021 
Collaboration Products in the 2021 Licensed Territory in accordance with the commercialization plan. Both parties will perform medical affairs activities 
for 2021 Collaboration Products in the 2021 Licensed Territory in accordance with a medical affairs plan. We will be responsible for commercialization and 
medical affairs activities costs incurred by the parties until first commercial sale of the first 2021 Collaboration Product in the 2021 Licensed Territory and 
in accordance with a pre-launch plan, up to a specified cap.

49

In the future, we expect to build a focused sales and marketing infrastructure, or certain components of such infrastructure, to market or co-promote 

our product candidates in the United States and potentially elsewhere, if and when they are approved. There are risks involved with establishing our own 
sales, marketing and distribution capabilities. For example, recruiting and training a sales force is expensive and time-consuming and could delay any 
product launch. If the commercial launch of a product candidate for which we recruit a sales force and establish marketing capabilities is delayed or does 
not occur for any reason, we would have prematurely or unnecessarily incurred these commercialization expenses. This may be costly, and our investment 
would be lost if we or our collaborators cannot retain or reposition sales and marketing personnel.

Factors that may inhibit efforts to commercialize our products include:

•

•

•

•

•

inability to recruit, train and retain adequate numbers of effective sales and marketing personnel;

the inability of sales personnel to obtain access to or educate physicians on the benefits of our products;

the lack of complementary products to be offered by sales personnel, which may put us at a competitive disadvantage relative to companies 
with more extensive product lines;

unforeseen costs and expenses associated with creating an independent sales and marketing organization; and

inability to obtain sufficient coverage and reimbursement from third-party payors and governmental agencies.

Outside the United States, we rely and may increasingly rely on third parties, including Nestlé, to sell, market and distribute our product candidates. 
We may not be successful in entering into arrangements with such third parties or may be unable to do so on terms that are favorable to us. In addition, our 
product revenue and our profitability, if any, may be lower if we rely on third parties for these functions than if we were to market, sell and distribute any 
products that we develop ourselves. We likely will have little control over such third parties, and any of them may fail to devote the necessary resources 
and attention to sell and market our products effectively. If we do not establish sales, marketing and distribution capabilities successfully, either on our own 
or in collaboration with third parties, we will not be successful in commercializing our product candidates.

We face substantial competition, which may result in others discovering, developing or commercializing competing products before or more 
successfully than we do.

The development and commercialization of new drug and biologic products is highly competitive and is characterized by rapid and substantial 
technological development and product innovations. We and our collaborators face competition with respect to our current product candidates and will face 
competition with respect to any product candidates that we may seek to develop or commercialize in the future, from major pharmaceutical companies, 
specialty pharmaceutical companies and biotechnology companies worldwide. We are aware of a number of large pharmaceutical and biotechnology 
companies, as well as smaller, early-stage companies, that are pursuing the development of products, including microbiome therapeutics, for reducing CDI 
and other disease indications we are targeting. Some of these competitive products and therapies are based on scientific approaches that are the same as or 
similar to our approach, and others may be based on entirely different approaches. For example, FMT is a procedure that has resulted in reports of high 
cure rates for recurrent CDI and our competitors and physicians may continue to seek to standardize and implement this procedure. Potential competitors 
also include academic institutions, government agencies, not-for-profits, and other public and private research organizations that conduct research, seek 
patent protection and establish collaborative arrangements for research, development, manufacturing and commercialization.

Many of the companies against which we are competing or against which we may compete in the future have significantly greater financial 

resources, established presence in the market and expertise in research and development, manufacturing, preclinical testing, conducting clinical trials, 
obtaining regulatory approvals and reimbursement and marketing approved products than we do. Mergers and acquisitions in the pharmaceutical and 
biotechnology industries may result in even more resources being concentrated among a smaller number of our competitors.

These third parties compete with us in recruiting and retaining qualified scientific, sales and marketing and management personnel, establishing 

clinical trial sites and patient registration for clinical trials, as well as in acquiring technologies complementary to, or necessary for, our programs.

50

Our commercial opportunity could be reduced or eliminated if our competitors develop and commercialize products that are more effective, have 

fewer or less severe side effects, are more convenient or are less expensive than any products that we may develop. Our competitors also may obtain FDA 
or other regulatory approval for their products more rapidly than we may obtain approval for ours, which could result in our competitors establishing a 
strong market position before we are able to enter the market, especially for any competitor developing a microbiome therapeutic which will likely share 
our same regulatory approval requirements. In addition, our ability to compete may be affected in many cases by insurers or other third-party payors 
seeking to encourage the use of generic or biosimilar products.

Even if we are able to commercialize any product candidates, the products may become subject to unfavorable pricing regulations or third-party 
coverage and reimbursement policies, any of which would harm our business.

Our ability to commercialize any product candidates successfully will depend, in part, on the extent to which coverage and reimbursement for these 

products and related treatments will be available from government health administration authorities, private health insurers and other organizations. 
Government authorities and third-party payors, such as private health insurers and health maintenance organizations, decide which medications they will 
pay for and impact reimbursement levels.

Obtaining and maintaining adequate reimbursement for our products may be difficult. We cannot be certain if and when we will obtain an adequate 

level of reimbursement for our products by third-party payors. Even if we do obtain adequate levels of reimbursement, third-party payors, such as 
government or private healthcare insurers, carefully review, and increasingly question the coverage of, and challenge the prices charged for, drugs. 
Reimbursement rates from private health insurance companies vary depending on the company, the insurance plan and other factors. A primary trend in the 
U.S. healthcare industry and elsewhere is cost containment. Government authorities and third-party payors have attempted to control costs by limiting 
coverage and the amount of reimbursement for particular medications. Increasingly, third-party payors are requiring that drug companies provide them with 
predetermined discounts from list prices and are challenging the prices charged for drugs. We may also be required to conduct expensive 
pharmacoeconomic studies to justify coverage and reimbursement or the level of reimbursement relative to other therapies. If coverage and reimbursement 
are not available or reimbursement is available only to limited levels, we may not be able to successfully commercialize any product candidate for which 
we obtain marketing approval, and the royalties resulting from the sales of those products may also be adversely impacted.

There may be significant delays in obtaining reimbursement for newly approved drugs, and coverage may be more limited than the purposes for 

which the drug is approved by the FDA or similar regulatory authorities outside the United States. Moreover, eligibility for reimbursement does not imply 
that a drug will be paid for in all cases or at a rate that covers our costs, including research, development, manufacture, sale and distribution. Interim 
reimbursement levels for new drugs, if applicable, may also not be sufficient to cover our costs and may not be made permanent. Reimbursement rates may 
vary according to the use of the drug and the clinical setting in which it is used, may be based on reimbursement levels already set for lower cost treatment 
approaches and may be incorporated into existing payments for other services. Net prices for drugs may be reduced by mandatory discounts or rebates 
required by government healthcare programs or private payors and by any future relaxation of laws that presently restrict imports of drugs from countries 
where they may be sold at lower prices than in the United States. Our inability to promptly obtain coverage and adequate reimbursement rates from both 
government-funded and private payors for any approved products that we develop could have a material adverse effect on our operating results, our ability 
to raise capital needed to commercialize products and our overall financial condition.

The regulations that govern marketing approvals, pricing, coverage and reimbursement for new drug products vary widely from country to country. 
Current and future legislation may significantly change the approval requirements in ways that could involve additional costs and cause delays in obtaining 
approvals. Some countries require approval of the sale price of a drug before it can be reimbursed. In many countries, the pricing review period begins after 
marketing or product licensing approval is granted. In some foreign markets, prescription pharmaceutical pricing remains subject to continuing 
governmental control, including possible price reductions, even after initial approval is granted. As a result, we might obtain marketing approval for a 
product in a particular country, but then be subject to price regulations that delay our commercial launch of the product, possibly for lengthy time periods, 
and negatively impact the revenues we are able to generate from the sale of the product in that country. Adverse pricing limitations may hinder our ability 
to recoup our investment in one or more product candidates, even if our product candidates obtain marketing approval. There can be no assurance that our 
product candidates, if they are approved for sale in the United States or in other countries, will be considered medically necessary for a specific indication 
or cost-effective, or that coverage or an adequate level of reimbursement will be available.

51

Product liability lawsuits against us could cause us to incur substantial liabilities and limit commercialization of any products that we may develop.

We face an inherent risk of product liability exposure related to the testing of our product candidates in clinical trials and will face an even greater 
risk if we commercially sell any products that we may develop. If we cannot successfully defend ourselves against claims that our product candidates or 
products caused injuries, we will incur substantial liabilities. Regardless of merit or eventual outcome, liability claims may result in:

•

•

•

•

•

•

•

•

•

regulatory investigations, product recalls or withdrawals, or labeling, marketing or promotional restrictions;

decreased demand for any product candidates or products that we may develop;

injury to our reputation and significant negative media attention;

withdrawal of clinical trial participants;

significant costs to defend the related litigation;

substantial monetary awards to trial participants or patients;

loss of revenue;

reduced resources of our management to pursue our business strategy; and

the inability to commercialize any products that we may develop.

We currently hold $5.0 million in product liability insurance coverage in the aggregate, with a per occurrence limit of $5.0 million, which may not 
be adequate to cover all liabilities that we may incur. We may need to increase our insurance coverage as we expand our clinical trials or if we commence 
commercialization of our product candidates. Insurance coverage is increasingly expensive. We may not be able to maintain insurance coverage at a 
reasonable cost or in an amount adequate to satisfy any liability that may arise.

We may face competition from biosimilars, which may have a material adverse impact on the future commercial prospects of our product candidates.

Even if we and our collaborators are successful in achieving regulatory approval to commercialize a product candidate faster than our competitors, 

we may face competition from biosimilars. In the United States, the Biologics Price Competition and Innovation Act, or BPCIA, enacted in 2010 as part of 
the Patient Protection and Affordable Care Act, created an abbreviated approval pathway for biological products that are demonstrated to be “highly 
similar,” or biosimilar, to or “interchangeable” with an FDA-approved biological product. Under the BPCIA, an application for a biosimilar product may 
not be submitted to the FDA until four years following the date that the reference product was first licensed by the FDA. In addition, the approval of a 
biosimilar product may not be made effective by the FDA until 12 years from the date on which the reference product was first licensed. During this 12-
year period of exclusivity, another company may still market a competing version of the reference product if the FDA approves a full BLA for the 
competing product containing the sponsor’s own preclinical data and data from adequate and well-controlled clinical trials to demonstrate the safety, purity 
and potency of their product. This pathway could allow competitors to reference data from innovative biological products 12 years after the time of 
approval of the innovative biological product. This data exclusivity does not prevent another company from developing a product that is highly similar to 
the innovative product, generating its own data and seeking approval. Data exclusivity only assures that another company cannot rely upon the data within 
the innovator’s application to support the biosimilar product’s approval.

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. 
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 products for competing products, potentially creating the opportunity for generic competition sooner than anticipated. It is 
possible that Congress or the FDA may take these or other measures to reduce or eliminate periods of exclusivity. The BPCIA is complex and continues to 
be interpreted and implemented by the FDA, and such FDA implementation could have a material adverse effect on the future commercial prospects for 
our product candidates.

In Europe, the European Commission has granted marketing authorizations for several biosimilars pursuant to a set of general and product class-
specific guidelines for biosimilar approvals issued over the past few years. In Europe, a competitor may reference data supporting approval of an innovative 
biological product but will not be able to get on the market until 10 years after the time of approval of the innovative product. This 10-year marketing 
exclusivity period can be extended to 11 years if, during the first eight of those 10 years, the marketing authorization holder obtains an approval for one or 
more new therapeutic indications that bring significant clinical benefits compared with existing therapies. In addition, companies may be developing 
biosimilars in other countries that could compete with our products. If competitors are able to obtain marketing approval for biosimilars referencing our 
products, our products may become subject to competition from such biosimilars, with the attendant competitive pressure and consequences.

52

Failure to obtain marketing approval in international jurisdictions would prevent our product candidates from being marketed abroad.

In order to market and sell our products in the European Union and many other jurisdictions, we or our collaborators must obtain separate marketing 

approvals and comply with numerous and varying regulatory requirements. The approval procedure varies among countries and can involve additional 
testing. The time required to obtain approval in foreign countries may differ substantially from that required to obtain FDA approval. Clinical trials 
conducted in one country may not be accepted by regulatory authorities in other countries. The regulatory approval process outside the United States 
generally includes all of the risks associated with obtaining FDA approval. In addition, in many countries outside the United States, it is required that the 
product be approved for reimbursement before the product can be approved for sale in that country. We or our collaborators may not obtain approvals for 
our product candidates from regulatory authorities outside the United States on a timely basis, if at all. Approval by the FDA does not ensure approval by 
regulatory authorities in other countries or jurisdictions, and approval by one regulatory authority outside the United States does not ensure approval by 
regulatory authorities in other countries or jurisdictions or by the FDA. However, a failure or delay in obtaining regulatory approval in one country may 
have a negative effect on the regulatory process in others. We may not be able to file for marketing approvals and may not receive necessary approvals to 
commercialize our products in any market.

Any product candidate for which we obtain marketing approval will remain subject to significant post-marketing regulatory requirements and 
oversight.

Any product candidate for which we obtain marketing approval, along with the manufacturing processes, post-approval clinical data, labeling, 
advertising and promotional activities for such product, will be subject to the continual requirements of and review by the FDA and other regulatory 
authorities. These requirements include submissions of safety and other post-marketing information and reports, registration and listing requirements, 
cGMP and similar foreign requirements relating to manufacturing, quality control, quality assurance and corresponding maintenance of records and 
documents, requirements regarding the distribution of samples to physicians and recordkeeping. We and our contract manufacturers will also be subject to 
continual review and periodic inspections to assess compliance with cGMP and similar foreign requirements. Accordingly, we, and our collaborators and 
others with whom we work, must continue to expend time, money and effort in all areas of regulatory compliance, including manufacturing, production and 
quality control.

Even if marketing approval of a product candidate is granted, the approval may be subject to limitations on the indicated uses for which the product 
may be marketed or to specific conditions of approval, including a requirement to implement a risk evaluation and mitigation strategy, which could include 
requirements for a medication guide, communication plan, or restricted distribution system. If any of our product candidates receives marketing approval, 
the accompanying label may limit the approved use of our drug, which could limit sales of the product.

The FDA or other regulatory authorities may also impose requirements for costly post-marketing studies or clinical trials and surveillance to monitor 

the safety or efficacy of our approved products. The FDA or other regulatory authorities closely regulates the post-approval marketing and promotion of 
drugs and biologics to ensure they are marketed only for the approved indications and in accordance with the provisions of the approved labeling. 
Violations of the FDA’s and other regulatory authorities’ restrictions relating to the promotion of prescription drugs by us or our collaborators may also lead 
to investigations alleging violations of federal and state health care fraud and abuse laws, as well as state consumer protection laws.

In addition, if a regulatory authority, we or our collaborators later discover previously unknown problems with our products, such as adverse events 

of unanticipated severity or frequency, problems with manufacturers or manufacturing processes, or failure to comply with regulatory requirements, the 
regulatory authority may impose restrictions on the products or us and our collaborators, including requiring withdrawal of the product from the market. 
Any failure by us or our collaborators to comply with applicable regulatory requirements may yield various results, including:

•

•

•

•

•

•

•

•

litigation involving patients taking our products;

restrictions on such products, manufacturers or manufacturing processes;

restrictions on the labeling or marketing of a product;

restrictions on product distribution or use;

requirements to conduct post-marketing studies or clinical trials;

warning letters;

withdrawal of products from the market;

suspension or termination of ongoing clinical trials;

53

•

•

•

•

•

•

•

•

•

•

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

recall of products;

fines, restitution or disgorgement of profits or revenues;

suspension or withdrawal of marketing approvals;

damage to relationships with potential collaborators;

unfavorable press coverage and damage to our reputation;

refusal to permit the import or export of our products;

product seizure or detention;

injunctions; or

imposition of civil or criminal penalties.

Noncompliance with similar EU requirements regarding safety monitoring or pharmacovigilance can also result in significant financial penalties. 

Similarly, failure to comply with U.S. and foreign regulatory requirements regarding the development of products for pediatric populations and the 
protection of personal health information can also lead to significant penalties and sanctions.

Any government investigation of alleged violations of law could require us to expend significant time and resources in response and could generate 

negative publicity.

In addition, 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. We also cannot predict the likelihood, nature or extent of government regulation that 
may arise from future legislation or administrative action, either in the United States or abroad. For example, the results of the 2020 U.S. Presidential 
Election may impact our business and industry. Namely, the Trump administration took several executive actions, including the issuance of a number of 
Executive Orders, that could impose significant burdens on, or otherwise materially delay, the FDA’s ability to engage in routine oversight activities such as 
implementing statutes through rulemaking, issuance of guidance, and review and approval of marketing applications. It is difficult to predict whether or 
how these orders will be implemented, or whether they will be rescinded and replaced under the Biden administration. The policies and priorities of the 
new administration are unknown and could materially impact the regulations governing our product candidates. 

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 be subject to enforcement action and we may not achieve or sustain profitability.

The FDA and other regulatory authorities actively enforce the laws and regulations prohibiting the promotion of off-label uses.

If any of our product candidates are approved and we or our collaborators are found to have improperly promoted off-label uses of those products, 
we may become subject to significant liability. The FDA and other regulatory authorities strictly regulate the promotional claims that may be made about 
prescription products, such as our product candidates, if approved. In particular, a product may not be promoted for uses that are not approved by the FDA 
or such other regulatory authorities as reflected in the product’s approved labeling. If we receive marketing approval for a product candidate, physicians 
may nevertheless prescribe it to their patients in a manner that is inconsistent with the approved label. If we or our collaborators are found to have 
promoted such off-label uses, we may become subject to significant liability. The U.S. federal government has levied large civil and criminal fines against 
companies for alleged improper promotion of off-label use and has enjoined several companies from engaging in off-label promotion. The FDA has also 
requested that companies enter into consent decrees or permanent injunctions under which specified promotional conduct is changed or curtailed. If we 
cannot successfully manage the promotion of our product candidates, if approved, we could become subject to significant liability, which would materially 
adversely affect our business and financial condition.

Our relationships and any collaborators' relationships with customers, physicians and third-party payors are and will be subject to applicable anti-
kickback, fraud and abuse and other healthcare laws and regulations, which could expose us or our collaborators to criminal sanctions, civil penalties, 
exclusion from governmental healthcare programs, contractual damages, reputational harm and diminished profits and future earnings.

Healthcare providers, physicians and third-party payors will play a primary role in the recommendation and prescription of any product candidates 

for which we obtain marketing approval. Our and our collaborators' current and future arrangements with third-party payors, physicians and customers 
expose us to broadly applicable fraud and abuse and other healthcare laws and regulations that may restrict the business or financial arrangements and 
relationships through which we market, sell and distribute any products for 

54

which we obtain marketing approval. Restrictions under applicable federal and state healthcare laws and regulations include the following:

•

•

•

•

•

the federal Anti-Kickback Statute prohibits, among other things, persons from knowingly and willfully soliciting, offering, receiving or 
providing remuneration, directly or indirectly, in cash or in kind, to induce or reward, or in return for, either the referral of an individual for, 
or the purchase, order or recommendation of, any good or service, for which payment may be made under a federal healthcare program, such 
as Medicare and Medicaid; a person or entity does not need to have actual knowledge of the statute or specific intent to violate it to have 
committed a violation; 

the False Claims Act, imposes, among other things, impose criminal and civil penalties, including through civil whistleblower or qui tam 
actions, against individuals or entities for knowingly presenting, or causing to be presented, to the federal government, claims for payment 
that are false or fraudulent, knowingly making, using or causing to be made or used, a false record or statement material to a false or 
fraudulent claim or from knowingly making a false statement to avoid, decrease or conceal an obligation to pay money to the federal 
government. In addition, the 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 federal False Claims Act;

HIPAA, imposes criminal and civil liability for executing a scheme to defraud any healthcare benefit program or making false statements 
relating to healthcare matters; similar to the federal Anti-Kickback Statute, a person or entity does not need to have actual knowledge of these 
statutes or specific intent to violate them to have committed a violation;

the federal Physician Payment Sunshine Act requires applicable manufacturers of covered drugs to report payments and other transfers of 
value to physicians (defined to include doctors, dentists, optometrists, podiatrists and chiropractors), certain non-physician practitioners 
(physician assistants, nurse practitioners, clinical nurse specialists, certified registered nurse anesthetists, anesthesiology assistants, and 
certified nurse midwives), and teaching hospitals, and ownership and investment interests held by physicians and their immediate family 
members; manufacturers are required to submit reports to the government by the 90th day of each calendar year; and

analogous state and foreign laws and regulations, such as state anti-kickback and false claims laws, may apply to our business practices, 
including but not limited to, research, distribution, sales or marketing arrangements and claims involving healthcare items or services 
reimbursed by non-governmental third-party payors, including private insurers; state laws that require pharmaceutical companies to comply 
with the pharmaceutical industry’s voluntary compliance guidelines and the relevant compliance guidance promulgated by the federal 
government (or foreign governments) and may require drug manufacturers to report information related to payments and other transfers of 
value to physicians and other healthcare providers, pricing information or marketing expenditures.

The risk of our or our collaborators being found in violation of these laws is increased by the fact that many of them have not been fully interpreted 

by the regulatory authorities or the courts, and their provisions are open to a variety of interpretations. Any action against us or our collaborators for 
violation of these laws, even if we successfully defend against it, could cause us to incur significant legal expenses and divert our management’s attention 
from the operation of our business. The shifting compliance environment and the need to build and maintain a robust system to comply with multiple 
jurisdictions with different compliance and reporting requirements increases the possibility that we may violate one or more of the requirements.

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

substantial costs. It is possible that governmental authorities will conclude that our business practices may not comply with current or future statutes, 
regulations or case law involving applicable fraud and abuse or other healthcare laws and regulations. If our operations are found to be in violation of any 
of these laws or any other governmental laws and regulations that may apply to us, we may be subject to significant civil, criminal and administrative 
penalties, damages, fines, imprisonment, exclusion from government funded healthcare programs, such as Medicare and Medicaid, reporting obligations 
and oversight if we become subject to a corporate integrity agreement or other agreement, and the curtailment or restructuring of our operations.

Recently enacted and future legislation may increase the difficulty and cost for us to obtain marketing approval of and commercialize our product 
candidates and affect the prices we may obtain.

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

the healthcare system that could prevent or delay marketing approval of our product candidates, restrict or regulate post-approval activities and affect our 
ability to profitably sell any product candidates for which we obtain marketing approval.

In the United States, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Affordability Reconciliation 
Act, or collectively the ACA, is a sweeping law intended to broaden access to health insurance, reduce or constrain the growth of healthcare spending, 
enhance remedies against fraud and abuse, add new transparency requirements for the healthcare and health insurance industries, impose new taxes and 
fees on the health industry and impose additional health policy reforms.

55

Among the provisions of the ACA of importance to our potential product candidates are the following:

•

•

•

•

•

•

•

•

•

establishment of a new pathway for approval of lower-cost biosimilars to compete with biologic products, such as those we are developing;

an annual, nondeductible fee payable by any entity that manufactures or imports specified branded prescription drugs and biologic agents;

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

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

extension of manufacturers’ Medicaid rebate liability;

expansion of eligibility criteria for Medicaid programs;

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

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

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

Since its enactment, there have been judicial, executive and Congressional challenges to certain aspects of the ACA. On June 17, 2021, the U.S. 

Supreme Court dismissed the most recent judicial challenge to the ACA brought by several states without specifically ruling on the constitutionality of the 
ACA. Prior to the Supreme Court’s decision, President Biden issued an executive order initiating a special enrollment period from February 15, 2021 
through August 15, 2021 for purposes of obtaining health insurance coverage through the ACA marketplace.  The executive order also instructed certain 
governmental agencies to review and reconsider their existing policies and rules that limit access to healthcare. It is unclear how healthcare reform 
measures enacted by Congress or implemented by the Biden administration or other challenges to the ACA, if any, will impact the ACA or our business.   
In addition, other legislative changes have been proposed and adopted since the ACA was enacted. For example, the Budget Control Act of 2011, enacted 
in August 2011, included aggregate reductions of Medicare payments to providers of 2% per fiscal year, which went into effect on April 1, 2013 and, due to 
subsequent legislative amendments, will remain in effect through 2030, with the exception of a temporary suspension from May 1, 2020 through March 31, 
2022, unless additional Congressional action is taken. On January 2, 2013, the American Taxpayer Relief Act of 2012 was signed into law, which, among 
other things, reduced Medicare payments to several providers, including hospitals, and an increase in the statute of limitations period for the government to 
recover overpayments to providers from three to five years. 

Further, in March 2021, the American Rescue Plan Act of 2021 was signed into law, which, among other things, eliminated the statutory cap on drug 

manufacturers’ Medicaid Drug Rebate Program rebate liability, effective January 1, 2024. Under current law enacted as part of the ACA, drug 
manufacturers’ Medicaid Drug Rebate Program rebate liability is capped at 100% of the average manufacturer price for a covered outpatient drug.  We 
expect that other healthcare reform measures that may be adopted in the future may result in additional reductions in Medicare and other healthcare 
funding, more rigorous coverage criteria, new payment methodologies and in additional downward pressure on the price that we receive for any approved 
product. Any reduction in reimbursement from Medicare or other government programs may result in a similar reduction in payments from private payors. 
The implementation of cost containment measures or other healthcare reforms may prevent us from being able to generate revenue, attain profitability, or 
commercialize our product candidates, if approved.

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

Individual states in the United States have become increasingly active in implementing regulations designed to contain pharmaceutical and biological 
product pricing, including price or patient reimbursement constraints, discounts, restrictions on certain product access and marketing cost disclosure and 
transparency measures. 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.

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

56

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

In some countries, particularly the EU member states, the pricing of certain pharmaceuticals is subject to governmental control. In these countries, 

pricing negotiations with governmental authorities can take considerable time after the receipt of marketing approval for a product. 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 coverage and 
reimbursement have been obtained. Reference pricing used by various EU member states and parallel distribution or arbitrage between low-priced and 
high-priced member states, can further reduce prices. To obtain reimbursement or pricing approval in some countries, we may be required to conduct a 
clinical trial that compares the cost-effectiveness of our product candidate to other available therapies. Other member states allow companies to fix their 
own prices for medicines but monitor and control company profits. Even if a pharmaceutical product obtains a marketing authorization in the EU, there can 
be no assurance that reimbursement for such product will be secured on a timely basis or at all. If coverage and reimbursement of our products are 
unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels, our business could be harmed, possibly materially.

Risks Related to Our Intellectual Property

If we are unable to adequately protect our proprietary technology or obtain and maintain issued patents that are sufficient to protect our product 
candidates, others could compete against us more directly, which would have a material adverse impact on our business, results of operations, financial 
condition and prospects.

Our success depends in large part on our ability to obtain and maintain patent and other intellectual property protection in the United States and 
other countries with respect to our proprietary technology and products. We seek to protect our proprietary position by filing patent applications in the 
United States and abroad related to our novel technologies and product candidates. We also rely on trade secrets to protect aspects of our business that are 
not amenable to, or that we do not consider appropriate for, patent protection.

The patent prosecution 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, in a timely manner, or in all jurisdictions. Prosecution of our patent portfolio is at a very early stage. For some patent 
applications in our portfolio, we have filed national stage applications based on our Patent Cooperation Treaty, or PCT, applications, thereby limiting the 
jurisdictions in which we can pursue patent protection for the various inventions claimed in those applications. 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. It is possible that defects of form in the 
preparation or filing of our patents or patent applications may exist, or may arise in the future, such as, with respect to proper priority claims, inventorship, 
claim scope or patent term adjustments. If there are material defects in the form or preparation of our patents or patent applications, such patents or 
applications may be invalid and unenforceable. Moreover, our competitors may independently develop equivalent knowledge, methods and know-how. 
Any of these outcomes could impair our ability to prevent competition from third parties, which may have an adverse impact on our business, financial 
condition and operating results.

We have obtained licenses and options to obtain licenses from third parties and may obtain additional licenses and options in the future. In some 

circumstances, we may not have the right to control the preparation, filing and prosecution of patent applications, or to maintain the patents, covering 
technology that we license from third parties. We may also require the cooperation of our licensors to enforce any licensed patent rights, and such 
cooperation may not be provided. Therefore, these patents and applications may not be prosecuted and enforced in a manner consistent with the best 
interests of our business. Moreover, if we do obtain necessary licenses, we will likely have obligations under those licenses, and any failure to satisfy those 
obligations could give our licensor the right to terminate the license. Termination of a necessary license could have a material adverse impact on our 
business.

We have had in the past, and may have in the future, certain funding arrangements.  Such funding arrangements impose various obligations on us, 

including reporting obligations, and may subject certain of our intellectual property, such as intellectual property made using the applicable funding, to the 
rights of the U.S. government under the Bayh-Dole Act.  Any failure to comply with our obligations under a funding arrangement may have an adverse 
effect on our rights under the applicable agreement or our rights in the applicable intellectual property.  Compliance with our obligations or the exercise by 
the government or other funder of its rights, may limit certain opportunities or otherwise have an adverse effect on our business.

57

Our patent portfolio currently includes 24 active patent application families (which includes an option to license certain IP from MD Anderson and 
exclusive licenses to certain IP from Memorial Sloan Kettering Cancer Center). Of these, 21 applications have been nationalized and three are pending at 
the PCT stage. While we have obtained 18 issued U.S. patents and one currently allowed and soon to issue, we cannot provide any assurances that any of 
our pending patent applications will mature into issued patents and, if they do, that such patents or our current patents will include claims with a scope 
sufficient to protect our product candidates or otherwise provide any competitive advantage. For example, we are pursuing claims to therapeutic, binary 
compositions of certain bacterial populations. Any claims that may issue may provide coverage for such binary compositions and/or their use. However, 
such claims would not prevent a third party from commercializing alternative compositions that do not include both of the bacterial populations claimed in 
pending applications, potential applications or patents that have or may issue. There can be no assurance that any such alternative composition will not be 
equally effective. Further, given that our SER-109 product candidate is a complex composition with some variation from lot-to-lot and that, likewise, third-
party compositions may have similar complexity and variability, it is possible that a patent claim may provide coverage for some but not all lots of a 
product candidate or third-party product. These and other factors may provide opportunities for our competitors to design around our patents, should they 
issue.

Moreover, other parties have developed technologies that may be related or competitive to our approach and may have filed or may file patent 
applications and may have received or may receive patents that may overlap or conflict with our patent applications, either by claiming similar methods or 
by claiming subject matter that could dominate our patent position or cover one or more of our products. In addition, given the early stage of prosecution of 
our portfolio, it may be some time before we understand how patent offices react to our patent claims and whether they identify prior art of relevance that 
we have not already considered.

Publications of discoveries in the scientific literature often lag behind the actual discoveries, and patent applications in the United States and other 

jurisdictions are typically not published until 18 months after filing, or in some cases not at all. Therefore, we cannot know with certainty whether we were 
the first to make the inventions claimed in any owned patents or pending patent applications, or that we were the first to file for patent protection of such 
inventions, nor can we know whether those from whom we may license patents were the first to make the inventions claimed or were the first to file. For 
these and other reasons, the issuance, scope, validity, enforceability and commercial value of our patent rights are subject to a level of uncertainty. Our 
pending and future patent applications may not result in patents being issued which protect our technology or products, in whole or in part, or which 
effectively prevent others from commercializing competitive technologies and products. Changes in either the patent laws or interpretation of the patent 
laws in the United States and other countries may diminish the value of our patents or narrow the scope of our patent protection.

We may be subject to third-party preissuance submissions of prior art to the United States Patent and Trademark Office, or USPTO, or in a foreign 

jurisdiction in which our applications are filed, or become involved in opposition, derivation, reexamination, inter partes review, post-grant review or 
interference proceedings challenging our patent rights or the patent rights of others. For example, on April 25, 2017, we filed a notice of opposition in the 
European Patent Office challenging the validity of a patent issued to The University of Tokyo. See “—Third parties may initiate legal proceedings alleging 
that we are infringing their intellectual property rights, the outcome of which would be uncertain and could have a material adverse effect on the success of 
our business.”  The oral proceedings were held at the European Patent Office on February 18, 2019 and the Opposition Division required The University of 
Tokyo to narrow the scope of the claims of the patent.  The University of Tokyo has appealed certain aspects of the Opposition Division’s decision, as have 
we and other opponents.  An adverse determination in any such submission, proceeding or litigation could reduce the scope of, or invalidate, our patent 
rights, allow third parties to commercialize our technology or products and compete directly with us, without payment to us, or result in our inability to 
manufacture or commercialize products without infringing third-party patent rights. In addition, if the breadth or strength of protection provided by our 
patents and patent applications is threatened, it could dissuade companies from collaborating with us to license, develop or commercialize current or future 
product candidates. Furthermore, an adverse decision in an interference proceeding can result in a third party receiving the patent right sought by us, which 
in turn could affect our ability to develop, market or otherwise commercialize our product candidates. The issuance, scope, validity, enforceability and 
commercial value of our patents are subject to a level of uncertainty.

The patent position of biotechnology and pharmaceutical companies generally is highly uncertain, involves complex legal and factual questions and 

has in recent years been the subject of much litigation. Due to legal standards relating to patentability, validity, enforceability and claim scope of patents 
covering biotechnological and pharmaceutical inventions, our ability to obtain, maintain and enforce patents is uncertain and involves complex legal and 
factual questions. Even if issued, a patent’s validity, inventorship, ownership or enforceability is not conclusive. Accordingly, rights under any existing 
patent or any patents we might obtain or license may not cover our product candidates, or may not provide us with sufficient protection for our product 
candidates to afford a commercial advantage against competitive products or processes, including those from branded and generic pharmaceutical 
companies.

The degree of future protection for our proprietary rights is uncertain, and we cannot ensure that:

•

•

any of our pending patent applications, if issued, will include claims having a scope sufficient to protect our product candidates or any other 
products or product candidates;

any of our pending patent applications will issue as patents at all;

58

•

•

•

•

•

•

•

•

•

•

•

we will be able to successfully commercialize our product candidates, if approved, before our relevant patents expire;

we were the first to make the inventions covered by any existing patent and pending patent applications;

we were the first to file patent applications for these inventions;

others will not develop similar or alternative technologies that do not infringe or design around our patents;

others will not use pre-existing technology to effectively compete against us;

any of our patents, if issued, will be found to ultimately be valid and enforceable;

third parties will not compete with us in jurisdictions where we do not pursue and obtain patent protection;

we will be able to obtain and/or maintain necessary or useful licenses on reasonable terms or at all;

any patents issued to us will provide a basis for an exclusive market for our commercially viable products, will provide us with any 
competitive advantages or will not be challenged by third parties;

we will develop additional proprietary technologies or product candidates that are separately patentable; or

our commercial activities or products will not infringe upon the patents or proprietary rights of others.

Any litigation to enforce or defend our patent rights, even if we were to prevail, could be costly and time-consuming and would divert the attention 
of our management and key personnel from our business operations. We may not prevail in any lawsuits that we initiate and the damages or other remedies 
awarded if we were to prevail may not be commercially meaningful. Even if we are successful, domestic or foreign litigation, or USPTO or foreign patent 
office proceedings, may result in substantial costs and distraction to our management. We may not be able, alone or with our licensors or potential 
collaborators, to prevent misappropriation of our proprietary rights, particularly in countries where the laws may not protect such rights as fully as in the 
United States. Furthermore, because of the substantial amount of discovery required in connection with intellectual property litigation or other proceedings, 
there is a risk that some of our confidential information could be compromised by disclosure during this type of litigation or other proceedings. In addition, 
during the course of this kind of litigation or proceedings, there could be public announcements of the results of hearings, motions or other interim 
proceedings or developments or public access to related documents. If investors perceive these results to be negative, the market price for our common 
stock could be significantly harmed.

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

In addition to seeking patents for some of our technology and product candidates, we also utilize our trade secrets, including unpatented know-how, 

technology and other proprietary information, to maintain our competitive position. We seek to protect these trade secrets, in part, by entering into non- 
disclosure and confidentiality agreements with parties who have access to them, such as our employees, corporate collaborators, outside scientific 
collaborators, contract manufacturers, consultants, advisors and other third parties. We also seek to enter into confidentiality and invention or patent 
assignment agreements with our employees, advisors and consultants. Despite these efforts, any of these parties may breach the agreements and disclose 
our proprietary information, including our trade secrets, and we may not be able to obtain adequate remedies for such breaches. Our trade secrets may also 
be obtained by third parties by other means, such as breaches of our physical or computer security systems. Enforcing a claim that a party illegally 
disclosed or misappropriated a trade secret is difficult, expensive and time-consuming, and the outcome is unpredictable. In addition, some courts inside 
and outside the United States are less willing or unwilling to protect trade secrets. Moreover, if any of our trade secrets were to be lawfully obtained or 
independently developed by a competitor, we would have no right to prevent them, or those to whom they communicate it, from using that technology or 
information to compete with us. If any of our trade secrets were to be disclosed to or independently developed by a competitor, our competitive position 
would be harmed.

59

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

As is the case with other biotechnology companies, our success is heavily dependent on intellectual property, particularly 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, patent reform legislation could further increase the uncertainties and costs surrounding the prosecution of our patent applications and 
the enforcement or defense of our issued patents. On September 16, 2011, the Leahy-Smith America Invents Act, or the Leahy-Smith Act, was signed into 
law. The Leahy-Smith Act includes a number of significant changes to U.S. patent law. These include provisions that affect the way patent applications are 
prosecuted and may also affect patent litigation. The USPTO developed new regulations and procedures to govern administration of the Leahy-Smith Act, 
and many of the substantive changes to patent law associated with the Leahy-Smith Act, in particular the first to file provisions, only became effective on 
March 16, 2013. A third party that files a patent application in the USPTO after that date but before us could therefore be awarded a patent covering an 
invention of ours even if we had made the invention before it was made by the third party. This will require us to be cognizant going forward of the time 
from invention to filing of a patent application. Thus, for our U.S. patent applications containing a priority claim after March 16, 2013, there is a greater 
level of uncertainty in the patent law. Moreover, some of the patent applications in our portfolio will be subject to examination under the pre-Leahy- Smith 
Act law and regulations, while other patent applications in our portfolio will be subject to examination under the law and regulations, as amended by the 
Leahy-Smith Act. This introduces additional complexities into the prosecution and management of our portfolio.

In addition, the Leahy-Smith Act limits where a patentee may file a patent infringement suit and provides opportunities for third parties to challenge 
any issued patent in the USPTO. These provisions apply to all of our U.S. patents, even those issued before March 16, 2013. Because of a lower evidentiary 
standard in USPTO proceedings compared to the evidentiary standard in U.S. federal court necessary to invalidate a patent claim, a third party could 
potentially provide evidence in a USPTO proceeding sufficient for the USPTO to hold a claim invalid even though the same evidence would be insufficient 
to invalidate the claim if first presented in a federal court action. Accordingly, a third party may attempt to use the USPTO procedures to invalidate our 
patent claims because it may be easier for them to do so relative to challenging the patent in a federal court action. It is not clear what, if any, impact the 
Leahy-Smith Act will have on the operation of our business. However, the Leahy-Smith Act and its implementation could increase the uncertainties and 
costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could have a material 
adverse effect on our business and financial condition.

In addition, Supreme Court rulings have narrowed the scope of patent protection available in certain circumstances and weakened the rights of 
patent owners in certain situations. From time to time, the Supreme Court, other federal courts, Congress, or the USPTO, may change the standards of 
patentability and any such changes could have a negative impact on our business.

A number of cases decided by the Supreme Court have involved questions of when claims reciting abstract ideas, laws of nature, natural phenomena 

and/or natural products are eligible for a patent, regardless of whether the claimed subject matter is otherwise novel and inventive. These cases include 
Association for Molecular Pathology v. Myriad Genetics, Inc., 569 U.S. 12-398 (2013); Alice Corp. v. CLS Bank International, 573 U.S. 13-298 (2014); 
and Mayo Collaborative Services v. Prometheus Laboratories, Inc., 566 U.S. 10-1150 (2012). In response to these cases, the USPTO has issued guidance to 
the examining corps.

The full impact of these decisions is not yet known. For example, in view of these and subsequent court decisions, the USPTO has issued various 

materials to patent examiners providing guidance for determining the patent eligibility of claims reciting laws of nature, natural phenomena or natural 
products. Our current product candidates include natural products, therefore, this decision and its interpretation by the courts and the USPTO may impact 
prosecution, defense and enforcement of our patent portfolio. On March 4, 2014, the USPTO issued a memorandum reflecting the USPTO’s interpretation 
of the cases related to patent eligibility of natural products.  The March 4, 2014 memorandum was superseded by interim guidance published on December 
15, 2014. Additional guidance was published in July 2015 (July 2015 Update: Subject Matter Eligibility) and May 2016 (May 2016 Subject Matter 
Eligibility Update). The USPTO’s interpretation of the case law and new guidelines for examination may influence, possibly adversely, prosecution and 
defense of certain types of claims in our portfolio.

In addition to increasing uncertainty with regard to our ability to obtain future patents, this combination of events has created uncertainty with 

respect to the value of patents, once obtained. Depending on these and other decisions by Congress, the federal courts and the USPTO, the laws and 
regulations governing patents could change or be interpreted in unpredictable ways that would weaken our ability to obtain new patents or to enforce any 
patents that may issue to us in the future. In addition, these events may adversely affect our ability to defend any patents that may issue in procedures in the 
USPTO or in courts.

60

Third parties may initiate legal proceedings alleging that we are infringing their intellectual property rights, the outcome of which would be uncertain 
and could have a material adverse effect on the success of our business.

Our commercial success depends upon our ability, and the ability of our collaborators, to develop, manufacture, market and sell our product 
candidates and use our proprietary technologies without infringing the proprietary rights of third parties. There is considerable intellectual property 
litigation in the biotechnology and pharmaceutical industries. While no such litigation has been brought against us and we have not been held by any court 
to have infringed a third party’s intellectual property rights, we cannot guarantee that our technology, products or use of our products do not infringe third-
party patents.

We are aware of numerous patents and pending applications owned by third parties in the fields in which we are developing product candidates, both 

in the United States and elsewhere. However, we may have failed to identify relevant third-party patents or applications. For example, applications filed 
before November 29, 2000 and certain applications filed after that date that will not be filed outside the United States remain confidential until patents 
issue. Moreover, it is difficult for industry participants, including us, to identify all third-party patent rights that may be relevant to our product candidates 
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 patent applications 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 certain limitations, be later amended in a manner that could cover our technologies, our products or the use of our products. 
We are aware of several pending patent applications containing one or more claims that could be construed to cover some of our product candidates or 
technology, should those claims issue in their original form or in the form presently being pursued. In addition, we are aware of third-party patent families 
that include issued and allowed patents, including in the United States, including claims that, if valid and enforceable, could be construed to cover some of 
our product candidates or their methods of use. On April 25, 2017, we filed a notice of opposition in the European Patent Office challenging the validity of 
a patent issued to The University of Tokyo and requesting that it be revoked in its entirety for the reasons set forth in our opposition.  The oral proceedings 
were held at the European Patent Office on February 18, 2019 and the Opposition Division required The University of Tokyo to narrow the scope of the 
claims of the patent.  The University of Tokyo has appealed certain aspects of the Oppositions Division’s decision, as have we and other opponents.

The biotechnology and pharmaceutical industries are characterized by extensive litigation regarding patents and other intellectual property rights. 

Other parties may allege that our product candidates or the use of our technologies infringes patent claims or other intellectual property rights held by them 
or that we are employing their proprietary technology without authorization. We may become party to, or threatened with, future adversarial proceedings or 
litigation regarding intellectual property rights with respect to our products and technology, including interference or derivation proceedings before the 
USPTO and similar bodies in other countries. Third parties may assert infringement claims against us based on existing intellectual property rights and 
intellectual property rights that may be granted in the future. If we were to challenge the validity of an issued U.S. patent in court, such as an issued U.S. 
patent of potential relevance to some of our product candidates or methods of use, we would need to overcome a statutory presumption of validity that 
attaches to every U.S. patent. This means that in order to prevail, we would have to present clear and convincing evidence as to the invalidity of the patent’s 
claims. There is no assurance that a court would find in our favor on questions of infringement or validity.

Patent and other types of intellectual property litigation can involve complex factual and legal questions, and their outcome is uncertain. If we are 

found or believe there is a risk we may be found, to infringe a third party’s intellectual property rights, we could be required or may choose to obtain a 
license from such third party to continue developing and marketing our products and technology. However, we may not be able to obtain any such license 
on commercially reasonable terms or at all. Even if we were able to obtain a license, it could be non-exclusive, thereby giving our competitors access to the 
same technologies licensed to us. We could be forced, including by court order, to cease commercializing the infringing technology or product. In addition, 
we could be found liable for monetary damages, including treble damages and attorneys’ fees if we are found to have willfully infringed a patent. A finding 
of infringement could prevent us from commercializing our product candidates or force us to cease some of our business operations, which could materially 
harm our business. Claims that we have misappropriated the confidential information or trade secrets of third parties could have a similar negative impact 
on our business.

Even if we are successful in these proceedings, we may incur substantial costs and divert management time and attention in pursuing these 

proceedings, which could have a material adverse effect on us. If we are unable to avoid infringing the patent rights of others, we may be required to seek a 
license, defend an infringement action or challenge the validity of the patents in court, or redesign our products. Patent litigation is costly and time-
consuming. We may not have sufficient resources to bring these actions to a successful conclusion. In addition, intellectual property litigation or claims 
could force us to do one or more of the following:

•

•

cease developing, selling or otherwise commercializing our product candidates;

pay substantial damages for past use of the asserted intellectual property;

61

•

•

obtain a license from the holder of the asserted intellectual property, which license may not be available on reasonable terms, if at all; and

in the case of trademark claims, redesign, or rename, some or all of our product candidates or other brands to avoid infringing the intellectual 
property rights of third parties, which may not be possible and, even if possible, could be costly and time-consuming.

Any of these risks coming to fruition could have a material adverse effect on our business, results of operations, financial condition and prospects.

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

Competitors may infringe our intellectual property, including our patents or the patents of our licensors. As a result, we may be required to file 

infringement claims to stop third-party infringement or unauthorized use. This can be expensive, particularly for a company of our size, and time-
consuming. If we initiated legal proceedings against a third party to enforce a patent, if and when issued, 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. Grounds for a validity challenge include alleged failures to meet any 
of several statutory requirements, including lack of novelty, obviousness or non-enablement, or failure to claim patent eligible subject matter. Grounds for 
unenforceability assertions include allegations 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 abroad, 
even outside the context of litigation. Such mechanisms include re-examination, post grant review and equivalent proceedings in foreign jurisdictions, such 
as opposition proceedings. Such proceedings could result in revocation or amendment of our patents in such a way that they no longer cover our product 
candidates or competitive products. The outcome following legal assertions of invalidity and unenforceability is unpredictable. With respect to validity, for 
example, we cannot be certain that there is no invalidating prior art, of which we and the patent examiner were unaware during prosecution. If a defendant 
were to prevail on a legal assertion of invalidity and/or unenforceability, we would lose at least part, and perhaps all, of the patent protection on our product 
candidates. Moreover, even if not found invalid or unenforceable, the claims of our patents could be construed narrowly or in a manner that does not cover 
the allegedly infringing technology in question. Such a loss of patent protection would have a material adverse impact on our business.

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 noncompliance with these 
requirements.

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

patent and, in some jurisdictions, during the pendency of a patent application. 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. While an 
inadvertent lapse can in many cases be cured by payment of a late fee or by other means in accordance with the applicable rules, there are situations in 
which noncompliance can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the 
relevant jurisdiction. Noncompliance events that could result in abandonment or lapse of a patent or patent application include, but are not limited to, 
failure to respond to official actions within prescribed time limits, non-payment of fees and failure to properly legalize and submit formal documents. In 
such an event, our competitors might be able to enter the market, which would have a material adverse effect on our business.

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

It is our policy to enter into confidentiality and intellectual property assignment agreements with our employees, consultants, contractors and 
advisors. These agreements generally provide that inventions conceived by the party in the course of rendering services to us will be our exclusive property. 
However, these agreements may not be honored and may not effectively assign intellectual property rights to us. For example, even if we have a consulting 
agreement in place with an academic advisor pursuant to which such academic advisor is required to assign any inventions developed in connection with 
providing services to us, such academic advisor may not have the right to assign such inventions to us, as it may conflict with his or her obligations to 
assign all such intellectual property to his or her employing institution.

Litigation may be necessary to defend against these and other claims challenging inventorship or ownership. 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.

62

We may be subject to claims by third parties asserting that our employees or we have misappropriated their intellectual property, or claiming ownership 
of what we regard as our own intellectual property.

Many of our employees were previously employed at universities or other biotechnology or pharmaceutical companies, including our competitors or 

potential competitors. We may also engage advisors and consultants who are concurrently employed at universities or other organizations or who perform 
services for other entities. Although we try to ensure that our employees, advisors and consultants do not use the proprietary information or know-how of 
others in their work for us, we may be subject to claims that we or our employees, advisors or consultants have used or disclosed intellectual property, 
including trade secrets or other proprietary information, of any such party’s former or current employer or in violation of an agreement with another party. 
Although we have no knowledge of any such claims being alleged to date, if such claims were to arise, litigation may be necessary to defend against any 
such claims.

In addition, while it is our policy to require our employees, consultants, advisors and contractors who may be involved in the development of 

intellectual property to execute agreements assigning such intellectual property to us, we may be unsuccessful in executing such an agreement with each 
party who in fact develops intellectual property that we regard as our own. Our and their assignment agreements may not be self-executing or may be 
breached, and we may be forced to bring claims against third parties, or defend claims they may bring against us, to determine the ownership of what we 
regard as our intellectual property. Similarly, we may be subject to claims that an employee, advisor or consultant performed work for us that conflicts with 
that person’s obligations to a third party, such as an employer, and thus, that the third party has an ownership interest in the intellectual property arising out 
of work performed for us. Litigation may be necessary to defend against these claims. Although we have no knowledge of any such claims being alleged to 
date, if such claims were to arise, litigation may be necessary to defend against any such claims.

If we fail in prosecuting or defending any such claims, in addition to paying monetary damages, we may lose valuable intellectual property rights or 

personnel. Even if we are successful in prosecuting or defending against such claims, litigation could result in substantial costs and be a distraction to 
management.

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

Our registered or 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 collaborators 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 registered or unregistered trademarks 
or trade names. Over the long term, if we are unable to establish name recognition based on our trademarks and trade names, then we may not be able to 
compete effectively and our business may be adversely affected. Our efforts to enforce or protect our proprietary rights related to trademarks, trade secrets, 
domain names, copyrights or other intellectual property may be ineffective and could result in substantial costs and diversion of resources and could 
adversely impact our financial condition or results of operations.

We will not seek to protect our intellectual property rights in all jurisdictions throughout the world and we may not be able to adequately enforce our 
intellectual property rights even in the jurisdictions where we seek protection.

Filing, prosecuting and defending patents on product candidates in all countries and jurisdictions throughout the world would be prohibitively 
expensive, and our intellectual property rights in some countries outside the United States could be less extensive than in the United States, assuming that 
rights are obtained in the United States and assuming that rights are pursued outside the United States. The statutory deadlines for pursuing patent 
protection in individual foreign jurisdictions are based on the priority date of each of our patent applications. For each of the patent families that we believe 
provide coverage for our product candidates, we decide whether and where to pursue protection outside 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, even if we do 
elect to pursue patent rights outside the United States, we may not be able to obtain relevant claims and/or we may not be able to prevent third parties 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 do not pursue and obtain patent protection to develop their own products and 
further, may export otherwise infringing products to territories where we have patent protection, but enforcement is not as strong as that 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. Even if we pursue and obtain issued patents in particular jurisdictions, our patent claims or other intellectual property rights may not 
be effective or sufficient to prevent third parties from so competing.

63

The laws of some foreign countries do not protect intellectual property rights to the same extent as the laws of the United States. Many companies 
have encountered significant problems in protecting and defending intellectual property rights in certain foreign jurisdictions. The legal systems of some 
countries, particularly developing countries, do not favor the enforcement of patents and other intellectual property protection, especially those relating to 
biotechnology. This could make it difficult for us to stop the infringement of our patents, if obtained, or the misappropriation of our other intellectual 
property rights. For example, many foreign countries have compulsory licensing laws under which a patent owner must grant licenses to third parties. In 
addition, many countries limit the enforceability of patents against third parties, including government agencies or government contractors. In these 
countries, patents may provide limited or no benefit. Patent protection must ultimately be sought on a country-by-country basis, which is an expensive and 
time-consuming process with uncertain outcomes. Accordingly, we may choose not to seek patent protection in certain countries, and we will not have the 
benefit of patent protection in such countries.

If our ability to obtain and, if obtained, enforce our patents to stop infringing activities is inadequate, third parties may compete with our products, 

and our patents or other intellectual property rights may not be effective or sufficient to prevent them from competing. Accordingly, our intellectual 
property rights around the world may be inadequate to obtain a significant commercial advantage from the intellectual property we develop or license.

Risks Related to Our Operations

The COVID-19 pandemic has adversely impacted and could continue to adversely impact, our business, including our preclinical studies and clinical 
trials, results of operations and financial condition.

The COVID-19 pandemic and government measures taken in response have also had a significant impact, both direct and indirect, on businesses 
and commerce, as worker shortages have occurred, supply chains have been disrupted, and facilities and production have been suspended. In response to 
the spread of COVID-19 we have limited on-site staff to only those required on-site to execute their job responsibilities and limited the number of staff in 
any given research and development laboratory. We are continuing to monitor the impact of the COVID-19 pandemic on our operations and ongoing 
clinical development activity. Our mitigation activities to minimize COVID-19-related operation disruptions are ongoing, however, given the severity and 
evolving nature of the situation, the timing of clinical readouts is uncertain. As a result of the COVID-19 pandemic, we or our collaborators may 
experience further disruptions that could severely impact our business, preclinical studies and clinical trials, including:

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

• 

delays in receiving approval from local regulatory authorities to initiate our planned clinical trials;

delays or difficulties in enrolling patients in our clinical trials;

delays or difficulties in clinical site initiation, including difficulties in recruiting clinical site investigators and clinical site staff;

diversion of healthcare resources away from the conduct of clinical trials, including the diversion of hospitals serving as our clinical trial sites 

and hospital staff supporting the conduct of our clinical trials;

risk that participants enrolled in our clinical trials will contract COVID-19 while the clinical trial is ongoing, which could impact the results of 

the clinical trial, including by increasing the number of observed adverse events;

interruption of key clinical trial activities, such as clinical trial site data monitoring, due to limitations on travel imposed or recommended by 
federal or state governments, employers and others or interruption of clinical trial subject visits and study procedures (such as endoscopies 
that are deemed non-essential), which may impact the integrity of subject data and clinical study endpoints;

interruption or delays in the operations of the FDA or other regulatory authorities, which may impact approval timelines;

interruption of, or delays in receiving, supplies of our product candidates from our contract manufacturing organizations due to staffing 

shortages, production slowdowns, global shipping delays or stoppages and disruptions in delivery systems; 

limitations on employee resources that would otherwise be focused on the conduct of our preclinical studies and clinical trials, including 

because of sickness of employees or their families or the desire of employees to avoid contact with large groups of people.

refusal of the FDA or other regulatory authorities to accept data from clinical trials in affected geographies;

impacts from prolonged remote work arrangements, such as increased cybersecurity risks and strains on our business continuity plans; and

delays or difficulties with equity offerings due to disruptions and uncertainties in the securities market.

64

In addition, the trading prices for our and other biopharmaceutical companies’ stock have been highly volatile as a result of the COVID-19 
pandemic. As a result, we may face difficulties raising capital through sales of our common stock and any such sales may be on unfavorable terms. The 
COVID-19 pandemic continues to rapidly evolve. The extent to which the pandemic further impacts our business, including our preclinical studies and 
clinical trials, results of operations and financial condition will depend on future developments which are highly uncertain and cannot be predicted with 
confidence. Such factors include but are not limited to the duration and severity of the pandemic, the impact of variants, travel restrictions, quarantines, 
shelter-in-place orders and social distancing recommendations and regulations in the United States and other countries, business closures or business 
disruptions, the adoption and effectiveness of vaccines and vaccine distribution efforts, and the effectiveness of other actions taken in the United States and 
other countries to contain and treat the disease.

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

We are highly dependent on Eric Shaff, our President and Chief Executive Officer, as well as the other principal members of our management, 

scientific and clinical team. Although we have entered into employment agreements with our executive officers, each of them may terminate their 
employment with us at any time. We do not maintain “key person” insurance for any of our executives or other employees.

Recruiting and retaining qualified scientific, clinical, manufacturing and sales and marketing personnel will also be critical to our success. The loss 

of the services of our executive officers or other key employees could impede the achievement of our research, development and commercialization 
objectives and seriously harm our ability to successfully implement our business strategy. Furthermore, replacing executive officers and key employees 
may be difficult and may take an extended period of time because of the limited number of individuals in our industry with the breadth of skills and 
experience required to successfully develop, gain regulatory approval of and commercialize products. Competition to hire from this limited pool is intense, 
and we may be unable to hire, train, retain or motivate these key personnel on acceptable terms given the competition among numerous pharmaceutical and 
biotechnology companies for similar personnel. We also experience competition for the hiring of scientific and clinical personnel from universities and 
research institutions. In addition, we rely on consultants and advisors, including scientific and clinical advisors, to assist us in formulating our research and 
development and commercialization strategy. Our consultants and advisors may be employed by employers other than us and may have commitments 
under consulting or advisory contracts with other entities that may limit their availability to us. If we are unable to continue to attract and retain high quality 
personnel, our ability to pursue our growth strategy will be limited. 

We may expand our operational capabilities, and as a result, we may encounter difficulties in managing our growth, which could disrupt our 
operations.

We may experience significant growth in the number of our employees and the scope of our operations, particularly in the areas of lead discovery 
and product development, regulatory affairs, clinical affairs and manufacturing and, if any of our product candidates receives marketing approval, sales, 
marketing and distribution. To manage potential future growth, we must continue to implement and improve our managerial, operational and financial 
systems, expand our facilities and continue to recruit and train additional qualified personnel. Due to our limited financial resources and the limited 
experience of our management team in managing a company with such potential growth, we may not be able to effectively manage the expansion of our 
operations or recruit and train additional qualified personnel. The expansion of our operations may lead to significant costs and may divert our management 
and business development resources. Any inability to manage growth could delay the execution of our business plans or disrupt our operations.

A variety of risks associated with operating internationally could materially adversely affect our business.

We currently have limited international operations, but our business strategy incorporates potentially expanding internationally if any of our product 

candidates receive regulatory approval. We currently conduct clinical studies in Canada, Australia and New Zealand. We may conduct clinical studies in 
other countries as well. We currently plan to rely on collaborators, including Nestlé, to commercialize certain approved products outside of North America. 
Doing business internationally involves a number of risks, including but not limited to:

•

•

•

•

•

•

multiple, conflicting and changing laws and regulations, such as privacy regulations, tax laws, export and import restrictions, employment 
laws, regulatory requirements and other governmental approvals, permits and licenses;

failure by us to obtain and maintain regulatory approvals for the use of our products in various countries;

additional potentially relevant third-party patent rights;

complexities and difficulties in obtaining protection and enforcing our intellectual property;

difficulties in staffing and managing foreign operations;

complexities associated with managing multiple payor reimbursement regimes, government payors or patient self-pay systems;

65

•

•

•

•

•

•

•

limits in our ability to penetrate international markets;

global macroeconomic conditions, including inflation, labor shortages, supply chain shortages, or other economic, political or legal 
uncertainties or adverse developments;

financial risks, such as longer payment cycles, difficulty collecting accounts receivable, the impact of local and regional financial crises on 
demand and payment for our products and exposure to foreign currency exchange rate fluctuations;

political unrest and wars, such as the current situation with Ukraine and Russia, which could delay or disrupt our business, and if such 
political unrest escalates or spills over to or otherwise impacts additional regions it could heighten many of the other risk factors included in 
this Item 1A;

natural disasters, political and economic instability, including terrorism and political unrest, outbreak of disease or epidemics such as the 
COVID-19 pandemic, boycotts, curtailment of trade and other business restrictions;

certain expenses including, among others, expenses for travel, translation and insurance; and

regulatory and compliance risks that relate to maintaining accurate information and control over sales and activities that may fall within the 
purview of the U.S. Foreign Corrupt Practices Act, its books and records provisions, or its anti-bribery provisions.

Any of these factors could significantly harm our future international expansion and operations and, consequently, our results of operations.

Security breaches, loss of data and other disruptions could compromise sensitive information related to our business or prevent us from accessing 
critical information and expose us to liability, which could adversely affect our business and our reputation. 

In the ordinary course of our business, we collect and store sensitive data, including personally identifiable information, intellectual property and 

proprietary business information owned or controlled by ourselves or our employees, customers and other parties. We manage and maintain our 
applications and data utilizing a combination of on-site systems and cloud-based data centers. We utilize external security and infrastructure vendors to 
manage parts of our data centers. These applications and data encompass a wide variety of business-critical information, including research and 
development information, customer information, commercial information and business and financial information. We face a number of risks relative to 
protecting this critical information, including loss of access risk, inappropriate use or disclosure, unauthorized access, inappropriate modification and the 
risk of our being unable to adequately monitor and audit and modify our controls over our critical information. This risk extends to the third-party vendors 
and subcontractors we use to manage this sensitive data or otherwise process it on our behalf. The secure processing, storage, maintenance and 
transmission of this critical information are vital to our operations and business strategy, and we devote significant resources to protecting such 
information. Although we take reasonable measures to protect sensitive data from unauthorized access, use or disclosure, our information technology and 
infrastructure may still be vulnerable to, and we have in the past experienced, attacks by hackers or viruses or breaches due to employee error, malfeasance 
or other malicious or inadvertent disruptions. Further, attacks upon information technology systems are increasing in their frequency, levels of persistence, 
sophistication and intensity, and are being conducted by sophisticated and organized groups and individuals with a wide range of motives and expertise. As 
a result of the COVID-19 pandemic, we may also face increased cybersecurity risks due to our reliance on internet technology and the number of our 
employees who are working remotely, which may create additional opportunities for cybercriminals to exploit vulnerabilities. Furthermore, because the 
techniques used to obtain unauthorized access to, or to sabotage, systems change frequently and often are not recognized until launched against a target, we 
may be unable to anticipate these techniques or implement adequate preventative measures. We may also experience security breaches that may remain 
undetected for an extended period. Any such breach or interruption could compromise our networks and the information stored there could be accessed by 
unauthorized parties, publicly disclosed, lost or stolen. Any such access, breach, or other loss of information could result in legal claims or proceedings, 
and liability under federal or state laws that protect the privacy of personal information, and regulatory penalties. Notice of breaches may be required to 
affected individuals or other state, federal or foreign regulators, and for extensive breaches, notice may need to be made to the media or State Attorneys 
General. Such a notice could harm our reputation and our ability to compete. Although we have implemented security measures to prevent unauthorized 
access, such data is currently accessible through multiple channels, and there is no guarantee we can protect our data from breach. Unauthorized access, 
loss or dissemination could also disrupt our operations and damage our reputation, any of which could adversely affect our business.

Actual or perceived failures to comply with applicable data protection, privacy and security laws, regulations, standards and other requirements could 
adversely affect our business, results of operations, and financial condition.

The global data protection landscape is rapidly evolving, and we are or may become subject to numerous state, federal and foreign laws, 
requirements and regulations governing the collection, use, disclosure, retention, and security of personal information, such as information that we may 
collect in connection with clinical trials in the U.S. and abroad. Implementation standards and enforcement practices are likely to remain uncertain for the 
foreseeable future, and we cannot yet determine the impact future laws, regulations, standards, or perception of their requirements may have on our 
business. This evolution may create uncertainty in our business, affect our ability to operate in certain jurisdictions or to collect, store, transfer use and 
share personal information, 

66

necessitate the acceptance of more onerous obligations in our contracts, result in liability or impose additional costs on us. The cost of compliance with 
these laws, regulations and standards is high and is likely to increase in the future. Any failure or perceived failure by us to comply with federal, state or 
foreign laws or regulation, our internal policies and procedures or our contracts governing our processing of personal information could result in negative 
publicity, government investigations and enforcement actions, claims by third parties and damage to our reputation, any of which could have a material 
adverse effect on our operations, financial performance and business.

In the U.S., HIPAA, as amended by the Health Information Technology for Economic and Clinical Health Act, and their implementing regulations, 

or collectively HIPAA, imposes privacy, security and breach notification obligations on certain healthcare providers, health plans, and healthcare 
clearinghouses, known as covered entities, as well as their business associates that perform certain services that involve creating, receiving, maintaining or 
transmitting individually identifiable health information for or on behalf of such covered entities, and their covered subcontractors. Most healthcare 
providers, including research institutions from which we obtain clinical trial information, are subject to privacy and security regulations promulgated under 
HIPAA. We do not believe that we are currently acting as a covered entity or business associate under HIPAA and thus are not directly subject to its 
requirements or penalties. However, any person may be prosecuted under HIPAA’s criminal provisions either directly or under aiding-and-abetting or 
conspiracy principles. Consequently, depending on the facts and circumstances, we could face substantial criminal penalties if we knowingly receive 
individually identifiable health information from a HIPAA-covered healthcare provider or research institution that has not satisfied HIPAA’s requirements 
for disclosure of individually identifiable health information.

Certain states have also adopted comparable privacy and security laws and regulations, some of which may be more stringent than HIPAA. Such 
laws and regulations will be subject to interpretation by various courts and other governmental authorities, thus creating potentially complex compliance 
issues for us and our future customers and strategic partners. In addition, the CCPA went into effect on January 1, 2020. The CCPA creates individual 
privacy rights for California consumers and increases the privacy and security obligations of entities handling certain 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, the 
CPRA recently passed in California. The CPRA will impose additional data protection obligations on covered businesses, 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 will also create a 
new California data protection agency authorized to issue substantive regulations and could result in increased privacy and information security 
enforcement. The majority of the provisions will go into effect on January 1, 2023, and additional compliance investment and potential business process 
changes may be required. Similar laws have passed in Virginia and Colorado, and have been proposed in other states and at the federal level, reflecting a 
trend toward more stringent privacy legislation in the United States. The enactment of such laws could have potentially conflicting requirements that would 
make compliance challenging. In the event that we are subject to or affected by HIPAA, the CCPA, the CPRA or other domestic privacy and data protection 
laws, any liability from failure to comply with the requirements of these laws could adversely affect our financial condition. 

Our operations abroad may also be subject to increased scrutiny or attention from data protection authorities. For example, in Europe, the GDPR 

went into effect in May 2018 and imposes strict requirements for processing the personal data of individuals within the EEA. Companies that must comply 
with the GDPR face increased compliance obligations and risk, including more robust regulatory enforcement of data protection requirements and potential 
fines for noncompliance of up to €20 million or 4% of the annual global revenues of the noncompliant company, whichever is greater. Among other 
requirements, the GDPR regulates transfers of personal data subject to the GDPR to third countries that have not been found to provide adequate protection 
to such personal data, including the United States; in July 2020, the Court of Justice of the EU, or CJEU, limited how organizations could lawfully transfer 
personal data from the EU/EEA to the United States by invalidating the Privacy Shield for purposes of international transfers and imposing further 
restrictions on the use of standard contractual clauses, or SCCs. The European Commission issued revised SCCs on June 4, 2021 to account for the 
decision of the CJEU and recommendations made by the European Data Protection Board. The revised SCCs must be used for relevant new data transfers 
from September 27, 2021; existing standard contractual clauses arrangements must be migrated to the revised clauses by December 27, 2022. The new 
SCCs apply only to the transfer of personal data outside of the EEA and not the UK; the UK’s Information Commissioner’s Office launched a public 
consultation on its draft revised data transfers mechanisms in August 2021 and laid its proposal before Parliament, with the UK SCCs expected to come 
into force in March 2022, with a two-year grace period. There is some uncertainty around whether the revised clauses can be used for all types of data 
transfers, particularly whether they can be relied on for data transfers to non-EEA entities subject to the GDPR. As supervisory authorities issue further 
guidance on personal data export mechanisms, including circumstances where the SCCs cannot be used, and/or start taking enforcement action, we could 
suffer additional costs, complaints and/or regulatory investigations or fines, and/or if we are otherwise unable to transfer personal data between and among 
countries and regions in which we operate, it could affect the manner in which we provide our services, the geographical location or segregation of our 
relevant systems and operations, and could adversely affect our financial results.

Since the beginning of 2021, after the end of the transition period following the UK’s departure from the European Union, we are also subject to the 

UK data protection regime, which imposes separate but similar obligations to those under the GDPR and comparable penalties, including fines of up to 
£17.5 million or 4% of a noncompliant company’s global annual revenue for the preceding financial year, whichever is greater. As we continue to expand 
into other foreign countries and jurisdictions, we may be subject to additional laws and regulations that may affect how we conduct business.

67

Although we work to comply with applicable laws, regulations and standards, our contractual obligations and other legal obligations, these 
requirements are evolving and may be modified, interpreted and applied in an inconsistent manner from one jurisdiction to another, and may conflict with 
one another or other legal obligations with which we must comply. Any failure or perceived failure by us or our employees, representatives, contractors, 
consultants, collaborators, or other third parties to comply with such requirements or adequately address privacy and security concerns, even if unfounded, 
could result in additional cost and liability to us, damage our reputation, and adversely affect our business and results of operations.

Acquisitions or joint ventures could disrupt our business, cause dilution to our stockholders and otherwise harm our business.

We may acquire other businesses, products or technologies as well as pursue strategic alliances, joint ventures, technology licenses or investments in 
complementary businesses. We have not made any acquisitions to date, and our ability to do so successfully is unproven. Any of these transactions could be 
material to our financial condition and operating results and expose us to many risks, including:

•

•

•

•

•

•

•

•

disruption in our relationships with future customers or with current or future distributors or suppliers as a result of such a transaction;

unanticipated liabilities related to acquired companies;

additional exposure to cybersecurity risks and vulnerabilities from any newly acquired information technology infrastructure;

difficulties integrating acquired personnel, technologies and operations into our existing business;

diversion of management time and focus from operating our business to acquisition integration challenges;

increases in our expenses and reductions in our cash available for operations and other uses;

possible write-offs or impairment charges relating to acquired businesses; and

inability to develop a sales force for any additional product candidates.

Foreign acquisitions involve unique risks in addition to those mentioned above, including those related to integration of operations across different 

cultures and languages, currency risks and the particular economic, political and regulatory risks associated with specific countries.

Also, the anticipated benefit of any acquisition may not materialize. Future acquisitions or dispositions could result in potentially dilutive issuances 

of our equity securities, the incurrence of debt, contingent liabilities or amortization expenses or write-offs of goodwill, any of which could harm our 
financial condition. We cannot predict the number, timing or size of future joint ventures or acquisitions, or the effect that any such transactions might have 
on our operating results.

We have in the past been subject to securities class action litigation and may be subject to similar or other litigation in the future, which may harm our 
business.

Securities class action litigation has often been brought against a company following a decline in the market price of its securities. This risk is 
especially relevant for us because biopharmaceutical companies have experienced significant stock price volatility in recent years. On September 28, 2016, 
a purported stockholder filed a putative class action lawsuit in the U.S. District Court for the District of Massachusetts against us entitled Mariusz Mazurek 
v. Seres Therapeutics, Inc., et.al. alleging false and misleading statements and omissions about our clinical trials for our product candidate SER-109 in our 
public disclosures between June 25, 2015 and July 29, 2016. Although this lawsuit has been dismissed by the court, should we face similar or other 
litigation again, it could result in substantial costs and a diversion of management’s attention and resources, which could harm our business. In addition, the 
uncertainty of a pending lawsuit or potential filing of additional lawsuits could lead to more volatility and a reduction in our stock price.

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 
harm our business.

We are subject to numerous environmental, health and safety laws and regulations, including those governing laboratory procedures and the 
handling, use, storage, treatment and disposal of hazardous materials and wastes. Our operations involve the use of hazardous and flammable materials, 
including chemicals and biological materials such as human stool. Our operations also produce hazardous waste products. We generally contract with third 
parties for the disposal of these materials and wastes. We cannot eliminate the risk of contamination or injury, including from the novel coronavirus SARS-
CoV-2, which causes the COVID-19 disease, from these materials. In the event of contamination or injury resulting from our use of hazardous materials, 
we could be held liable for any resulting damages, and any liability could exceed our resources. We also could incur significant costs associated with civil 
or criminal fines and penalties for failure to comply with such laws and regulations.

Although we maintain workers’ compensation insurance to cover us for costs and expenses we may incur due to injuries to our employees resulting 

from the use of hazardous materials, this insurance may not provide adequate coverage against potential 

68

liabilities. We do not maintain insurance for environmental liability or toxic tort claims that may be asserted against us in connection with our storage or 
disposal of biological, hazardous or radioactive materials.

In addition, we may incur substantial costs in order to comply with current or future environmental, health and safety laws and regulations. These 
current or future laws and regulations may impair our research, development or production efforts. Our failure to comply with these laws and regulations 
also may result in substantial fines, penalties or other sanctions.

Our ability to use our net operating loss carryforwards and research and development credits to offset future taxable income or income tax liabilities 
may be subject to certain limitations.

As of December 31, 2021, we had net operating loss carryforwards, or NOLs, of $402.5 million for federal income tax purposes and $394.1 million 

for state income tax purposes, which may be available to offset our future taxable income, if any. Our federal and state NOLs begin to expire in various 
amounts in 2035, provided that federal NOLs generated in taxable years after December 31, 2017 will not be subject to expiration. As of December 31, 
2021, we also had federal and state research and development and other tax credit carryforwards of approximately $43.7 million and $11.9 million, 
respectively, available to reduce future income tax liabilities. Our federal and state tax credit carryforwards begin to expire in various amounts in 2031 and 
2028, respectively. The federal research and development tax credit carryforwards include an orphan drug credit carryforward of $23.7 million. These 
NOLs and tax credit carryforwards could expire unused, to the extent subject to expiration, and be unavailable to offset future taxable income or income tax 
liabilities. In addition, in general, under Sections 382 and 383 of the U.S. Internal Revenue Code of 1986, as amended (the "Code"), a corporation that 
undergoes an “ownership change” is subject to limitations on its ability to use its pre-change NOLs and tax credit carryforwards to offset future taxable 
income and income taxes. For these purposes, an ownership change generally occurs where the aggregate change in stock ownership of one or more 
stockholders or groups of stockholders owning at least 5% of a corporation’s stock exceeds 50 percentage points over a three-year period.  We have 
experienced ownership changes in the past, per the Section 382 study performed through December 31, 2020, and may experience ownership changes in 
the future because of future transactions in our stock, some of which may be outside our control. We believe that none of the existing tax attributes will 
expire unused as a result of the calculated limitations. If we undergo future ownership changes, our ability to use our NOLs and tax credit carryforwards 
could be further limited.  For these reasons, we may not be able to use a material portion of our NOLs or tax credit carryforwards, even if we attain 
profitability. We have recorded a full valuation allowance related to our NOLs and other deferred tax assets due to the uncertainty of the ultimate realization 
of the future tax benefits of such assets. Federal NOLs arising in periods beginning after December 31, 2017 may generally only be used to offset 80% of 
taxable income in years beginning after December 31, 2020, which may require us to pay federal income taxes in future years despite generating federal 
NOLs in prior years.

The terms of our credit facility place restrictions on our operating and financial flexibility. If we raise additional capital through debt financing, the 
terms of any new debt could further restrict our ability to operate our business. 

In October 2019, we entered into a loan and security agreement with Hercules pursuant to which a term loan facility in aggregate principal amount 
up to $50.0 million, or the Original Credit Facility, is available to us in three tranches, subject to certain terms and conditions. We received the first tranche 
of $25.0 million upon signing the agreement on October 29, 2019.  We did not meet the milestone requirements for the second tranche under the Original 
Credit Facility, and as such, the additional second tranche amount of up to $12.5 million is not available for us to borrow.  We elected not to borrow the 
third tranche of $12.5 million, which was available upon Hercules’ approval until June 30, 2021.  The Original Credit Facility is secured by a lien on 
substantially all of our assets, other than intellectual property. We also agreed not to pledge or secure our intellectual property to others. In April 2020, we 
entered into an amendment to the loan and security agreement with Hercules, or the First Amendment, permitting us to enter into a promissory note under 
the Paycheck Protection Program of the Coronavirus Aid, Relief and Economic Stability Act. In February 2022, we entered into a second amendment to the 
loan and security agreement with Hercules, or the Second Amendment, which amended the Original Credit Facility. Pursuant to the Second Amendment, 
term loans in an aggregate principal amount of up to $100.0 million, or the New Credit Facility, have become available to us in five tranches, subject to 
certain terms and conditions: (i) the first tranche in an aggregate principal amount of $25.0 million that is outstanding as of the February 24, 2022 effective 
date, or the Effective Date, (ii) the second tranche in an aggregate principal amount of $12.5 million that has been advanced to the Company and is 
outstanding as of the Effective Date, (iii) the third tranche in an aggregate principal amount of $12.5 million that has been advanced to the Company and is 
outstanding as of the Effective Date, (iv) the fourth tranche in an aggregate principal amount of $25.0 million available upon satisfaction of certain 
conditions, including the approval by the FDA of a biologics license application in respect of SER-109 by no later than December 15, 2023, and (v) the 
fifth tranche in an aggregate principal amount of up to $25.0 million that is available through the amortization date upon satisfaction of certain conditions, 
including the lenders’ investment committee approval. For a further description of the New Credit Facility, see Part II, Item 9B. “Other Information” in this 
Annual Report on Form 10-K.

The Original Credit Facility and the New Credit Facility include affirmative and negative covenants and events of default applicable to us.  The 

affirmative covenants include, among others, covenants requiring us to maintain our legal existence and governmental approvals, deliver certain financial 
reports and maintain insurance coverage.  The negative covenants include, among others, restrictions on our transferring collateral, making changes to the 
nature of our business, incurring additional indebtedness, engaging in mergers or acquisitions, paying dividends or making other distributions, making 
investments, engaging in transactions with affiliates. The Original Credit Facility and the New Credit Facility also include a conditional liquidity covenant. 
Events of default include, among other things and subject to customary exceptions: (i) insolvency, liquidation, bankruptcy or similar events; (ii) failure 

69

to pay any debts due under the loan and security agreement with Hercules or other loan documents on a timely basis; (iii) failure to observe certain 
covenants under the loan and security agreement with Hercules; (v) occurrence of a material adverse effect; (vi) material misrepresentation by us; (vii) 
occurrence of any default under any other agreement involving material indebtedness; and (viii) certain material money judgments. If we default under the 
loan and security agreement, Hercules may accelerate all of our repayment obligations and take control of our pledged assets, potentially requiring us to 
renegotiate our agreement on terms less favorable to us or to immediately cease operations. Further, if we are liquidated, the lenders’ right to repayment 
would be senior to the rights of the holders of our common stock to receive any proceeds from the liquidation.  Any declaration by Hercules of an event of 
default could significantly harm our business and prospects and could cause the price of our common stock to decline. If we raise any additional debt 
financing, the terms of such additional debt could further restrict our operating and financial flexibility.

Risks Related to Our Common Stock

Our executive officers, directors and principal stockholders, if they choose to act together, have the ability to control or significantly influence all 
matters submitted to stockholders for approval.

Our executive officers, directors and stockholders who owned more than 5% of our outstanding common stock and their respective affiliates, in the 
aggregate, hold shares representing approximately 72.8% of our outstanding voting stock. As a result, if these stockholders were to choose to act together, 
they would be able to control or significantly influence all matters submitted to our stockholders for approval, as well as our management and affairs. For 
example, these persons, if they choose to act together, would control or significantly influence the election of directors and approval of any merger, 
consolidation or sale of all or substantially all of our assets. This concentration of ownership control may:

•

•

•

delay, defer or prevent a change in control;

entrench our management and the board of directors; or

impede a merger, consolidation, takeover or other business combination involving us that other stockholders may desire.

A significant portion of our total outstanding shares are eligible to be sold into the market, which could cause the market price of our common stock to 
drop significantly, even if our business is doing well.

Sales of a substantial number of shares of our common stock in the public market, or the perception in the market that the holders of a large number 

of shares intend to sell shares, could reduce the market price of our common stock. 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.

We are no longer an “emerging growth company” or a "smaller reporting company" and, as a result we are subject to certain enhanced disclosure 
requirements.

The last day of the fiscal year following the fifth anniversary of our IPO was December 31, 2020. As a result, commencing January 1, 2021, we 

are subject to certain requirements that apply to other public companies but did not previously apply to us due to our status as an emerging growth 
company. Compliance with these enhanced disclosure requirements will increase our costs and could negatively affect our results of operations and 
financial condition. Moreover, as a large accelerated filer, we are required to comply with the auditor attestation requirements under Section 404 of the 
Sarbanes Oxley Act of 2002, as amended, or Section 404.

As of December 31, 2021, we are no longer a “smaller reporting company” as defined under the rules promulgated under the Exchange Act. Since 
we are no longer a smaller reporting company, we are unable to provide simplified executive compensation disclosure or take advantage of certain other 
reduced disclosure obligations, including, among other things, providing only two years of audited financial statements. 

We expect that the loss of smaller reporting company status and compliance with the related additional disclosure requirements will increase our 
legal and financial compliance costs and cause management and other personnel to divert attention from operational and other business matters to these 
additional public company reporting requirements.

Provisions in our restated certificate of incorporation and amended and restated bylaws and under Delaware law could make an acquisition of our 
company, which may be beneficial to our stockholders, more difficult and may prevent attempts by our stockholders to replace or remove our current 
management.

Provisions in our restated certificate of incorporation and our amended and restated bylaws may discourage, delay or prevent a merger, acquisition 
or other change in control of our company that stockholders may consider favorable, including transactions in which stockholders might otherwise receive 
a premium for their shares. These provisions could also limit the price that investors might be willing to pay in the future for shares of our common stock, 
thereby depressing the market price of our common stock. In addition, because our board of directors is responsible for appointing the members of our 
management team, these provisions may 

70

frustrate or prevent any attempts by our stockholders to replace or remove our current management by making it more difficult for stockholders to replace 
members of our board of directors. Among other things, these provisions include those establishing:

•

•

•

•

•

•

•

•

•

a classified board of directors with three-year staggered terms, which may delay the ability of stockholders to change the membership of a 
majority of our board of directors;

no cumulative voting in the election of directors, which limits the ability of minority stockholders to elect director candidates;

the exclusive right of our board of directors to elect a director to fill a vacancy created by the expansion of the board of directors or the 
resignation, death or removal of a director, which prevents stockholders from filling vacancies on our board of directors;

the ability of our board of directors to authorize the issuance of shares of preferred stock and to determine the terms of those shares, including 
preferences and voting rights, without stockholder approval, which could be used to significantly dilute the ownership of a hostile acquirer;

the ability of our board of directors to alter our bylaws without obtaining stockholder approval;

the required approval of the holders of at least two-thirds of the shares entitled to vote at an election of directors to adopt, amend or repeal 
our bylaws or repeal the provisions of our restated certificate of incorporation regarding the election and removal of directors;

a prohibition on stockholder action by written consent, which forces stockholder action to be taken at an annual or special meeting of our 
stockholders;

the requirement that a special meeting of stockholders may be called only by the chairman of the board of directors, the chief executive 
officer, the president or the board of directors, which may delay the ability of our stockholders to force consideration of a proposal or to take 
action, including the removal of directors; and

advance notice procedures that stockholders must comply with in order to nominate candidates to our board of directors or to propose matters 
to be acted upon at a stockholders’ meeting, which may discourage or deter a potential acquirer from conducting a solicitation of proxies to 
elect the acquirer’s own slate of directors or otherwise attempting to obtain control of us.

Moreover, because we are incorporated in Delaware, we are governed by the provisions of Section 203 of the General Corporation Law of the State 
of Delaware, which prohibits a person who owns in excess of 15% of our outstanding voting stock from merging or combining with us for a period of three 
years after the date of the transaction in which the person acquired in excess of 15% of our outstanding voting stock, unless the merger or combination is 
approved in a prescribed manner. 

Our certificate of incorporation designates the Court of Chancery of the State of Delaware, subject to certain exceptions, as the sole and exclusive 
forum for certain types of actions and proceedings that may be initiated by our stockholders and our bylaws designate the federal district courts of the 
United States as the exclusive forum for actions arising under the Securities Act of 1933, as amended, which could limit our stockholders’ ability to 
obtain a favorable judicial forum for disputes with us or our directors, officers or employees. 

Our restated certificate of incorporation specifies that, unless we consent in writing to the selection of an alternative forum, the Court of Chancery of 

the State of Delaware will be the sole and exclusive forum for most legal actions involving actions brought against us by stockholders. In addition, our 
bylaws provide that the federal district courts of the United States are the exclusive forum for any complaint raising a cause of action arising under the 
Securities Act. Any person or entity purchasing or otherwise acquiring any interest in shares of our capital stock shall be deemed to have notice of and to 
have consented to the provisions of our restated certificate of incorporation and bylaws described above.

We believe these choice of forum provisions benefit us by providing increased consistency in the application of Delaware law by chancellors 
particularly experienced in resolving corporate disputes and in the application of the Securities Act by federal judges, as applicable, efficient administration 
of cases on a more expedited schedule relative to other forums and protection against the burdens of multi-forum litigation. However, the provisions may 
have the effect of discouraging lawsuits against our directors and officers. The enforceability of similar choice of forum provisions in other companies’ 
certificates of incorporation has been challenged in legal proceedings, and it is possible that, in connection with any applicable action brought against us, a 
court could find the choice of forum provisions contained in our restated certificate of incorporation or bylaws to be inapplicable or unenforceable in such 
action. If a court were to find the choice of forum provisions contained in our restated certificate of incorporation or bylaws to be inapplicable or 
unenforceable in an action, we may incur additional costs associated with resolving such action in other jurisdictions, which could adversely affect our 
business, financial condition or results of operations.

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

71

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

growth and development of our business. In addition, our loan and security agreement with Hercules Capital currently prohibits us from paying dividends 
on our equity securities, and any future debt agreements may likewise preclude us from paying dividends. As a result, capital appreciation, if any, of our 
common stock will be our stockholders’ sole source of gain for the foreseeable future.

General Risk Factors

The price of our common stock may be volatile and fluctuate substantially, which could result in substantial losses for purchasers of our common 
stock.

Our stock price is likely to be volatile. Furthermore, the stock market in general and the market for smaller biopharmaceutical companies in 
particular have experienced extreme volatility that has often been unrelated to the operating performance of particular companies. As a result of this 
volatility, our stockholders may not be able to sell their common stock at or above the price they paid for their common stock. The market price for our 
common stock may be influenced by many factors, including:

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

•

the success of competitive products or technologies;

actual or anticipated changes in our growth rate relative to our competitors;

results of clinical trials of our product candidates or those of our competitors;

developments related to any future collaborations;

regulatory or legal developments in the United States and other countries;

development of new product candidates that may address our markets and may make our product candidates less attractive;

changes in physician, hospital or healthcare provider practices that may make our product candidates less useful;

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

developments or disputes concerning patent applications, issued patents or other proprietary rights;

the recruitment or departure of key personnel;

the level of expenses related to any of our product candidates or clinical development programs;

failure to meet or exceed financial estimates and projections of the investment community or that we provide to the public;

the results of our efforts to discover, develop, acquire or in-license additional product candidates or products;

actual or anticipated changes in estimates as to financial results, development timelines or recommendations by securities analysts;

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

changes in the structure of healthcare payment systems;

market conditions in the pharmaceutical and biotechnology sectors;

general economic, industry and market conditions; and

the other factors described in this “Risk Factors” section.

If securities or industry analysts issue an adverse or misleading opinion regarding our business, our common stock price and trading volume could 
decline.

The trading market for our common stock is influenced by the research and reports that industry or securities analysts publish about us or our 
business. If any of the analysts who cover us issue an adverse or misleading opinion regarding us, our business model, our intellectual property or our stock 
performance, or if our clinical studies and operating results fail to meet the expectations 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, we could lose visibility in the financial markets, which in turn could cause our 
stock price or trading volume to decline.

72

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, particularly now that we are no 

longer an emerging growth company or a smaller reporting company. The Sarbanes-Oxley Act of 2002, the Dodd-Frank Wall Street Reform and Consumer 
Protection Act, the listing requirements of The Nasdaq Global Select Market and other applicable securities rules and regulations impose various 
requirements on public companies, including establishment and maintenance of effective disclosure and financial controls and corporate governance 
practices. Our management and other personnel 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 maintain an effective system of internal control over financial reporting, we may not be able to accurately report our financial results or 
prevent fraud. As a result, stockholders could lose confidence in our financial and other public reporting, which would harm our business and the 
trading price of our common stock. 

Effective internal control over financial reporting is necessary for us to provide reliable financial reports and, together with adequate disclosure 
controls and procedures, is designed to prevent fraud. Any failure to implement required new or improved controls, or difficulties encountered in their 
implementation could cause us to fail to meet our reporting obligations. 

Pursuant to Section 404, we are required to furnish a report by our management on our internal control over financial reporting. Additionally, we are 

no longer a non-accelerated filer, so we are required to include an attestation report on internal control over financial reporting issued by our independent 
registered public accounting firm. If we are unable to maintain effective internal control over financial reporting, we may not have adequate, accurate or 
timely financial information, and we may be unable to meet our reporting obligations as a public company or comply with the requirements of the 
Securities and Exchange Commission or Section 404. This could result in a restatement of our financial statements, the imposition of sanctions, including 
the inability of registered broker dealers to make a market in our common stock, or investigation by regulatory authorities. Any such action or other 
negative results caused by our inability to meet our reporting requirements or comply with legal and regulatory requirements or by disclosure of an 
accounting, reporting or control issue could adversely affect the trading price of our securities and our business. Material weaknesses in our internal control 
over financial reporting could also reduce our ability to obtain financing or could increase the cost of any financing we obtain. This could result in an 
adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.

Item 1B. Unresolved Staff Comments

None.

Item 2. Properties

Research and Offices

Our corporate headquarters is located in Cambridge, Massachusetts, where we lease approximately 83,396 square feet of office, laboratory, and pilot 

manufacturing space under a lease that expires in November 2023.

Clinical Manufacturing

We currently conduct part of our manufacturing operations in our leased facilities in Cambridge, Massachusetts, which contain manufacturing 

facilities for clinical products. We believe our current laboratory facilities and contract relationships are sufficient to meet our current bioprocess 
development and manufacturing needs.  Product candidates may be brought into the facilities for economies of operation, or may remain external with 
contract manufacturing organizations, depending on business dynamics and development needs.

We plan to control the production of all products under current good manufacturing practices by making strategic investments in manufacturing, 
which may include collaborations with third parties, the design and renovation of existing facilities and the construction of additional new facilities for 
commercial supply.

73

Item 3. Legal Proceedings

Opposition Proceeding 

On October 19, 2016, the European Patent Office granted European Patent No. 2 575 835 B1 to The University of Tokyo. On April 25, 2017, we 

filed a notice of opposition to this patent in the European Patent Office, requesting that it be revoked in its entirety for the reasons set forth in our 
opposition.  The oral proceedings were held at the European Patent Office on February 18, 2019 and the Opposition Division required The University of 
Tokyo to narrow the scope of the claims of the patent.  The University of Tokyo has appealed certain aspects of the Opposition Division’s decision, as have 
we and other opponents.

Item 4. Mine Safety Disclosures

Not applicable.

74

PART II

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

Market Information

Our common stock has been publicly traded on the Nasdaq Global Select Market under the symbol “MCRB” since June 26, 2015. Prior to that time, 

there was no public market for our common stock. 

The graph set forth below compares the cumulative total stockholder return on our common stock between January 1, 2017 and December 31, 2021, 
with the cumulative total return of (a) the Nasdaq Biotechnology Index and (b) the Nasdaq Composite Index, over the same period. This graph assumes the 
investment of $100 on December 31, 2016 in each of our common stock, the Nasdaq Biotechnology Index and the Nasdaq Composite Index and assumes 
the reinvestment of dividends, if any. The comparisons reflected in the graph and table are not intended to forecast the future performance of our stock and 
may not be indicative of our future performance.

Stock Performance Graph

Holders

As of February 24, 2022, there were approximately 10 holders of record of our common stock. The actual number of stockholders is greater than 

this number of record holders, and includes stockholders who are beneficial owners, but whose shares are held in street name by brokers and other 
nominees. The number of holders of record also does not include stockholders whose shares may be held in trust by other entities.

Dividends

We have not paid any cash dividends on our common stock since inception and do not anticipate paying cash dividends in the foreseeable future. In 
addition, our loan and security agreement with Hercules Capital currently prohibits us from paying dividends on our equity securities, and any future debt 
agreements may likewise preclude us from paying dividends.  See “Management’s Discussion and Analysis of Financial Condition and Results of 
Operations – Liquidity and Capital Resources.”

Recent Sales of Unregistered Securities

We did not make any sales of unregistered securities during the quarter ended December 31, 2021. 

There were no repurchases of shares of common stock made during the quarter ended December 31, 2021.

Purchases of Equity Securities by the Issuer or Affiliated Purchasers

75

 
 
 
 
Item 6. [Reserved]

76

      
Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations

You should read the following discussion and analysis of financial condition and results of operations together with our consolidated financial 
statements and related notes included elsewhere in this Annual Report on Form 10-K. This discussion and other parts of this Annual Report on Form 10-K 
contain forward-looking statements that involve risks and uncertainties, such as statements regarding our plans, objectives, expectations, intentions and 
projections. Our actual results could differ materially from those discussed in these forward-looking statements. Important factors that could cause or 
contribute to such differences include, but are not limited to, those discussed in “Summary Risk Factors” and Part I and Item 1A. “Risk Factors” of this 
Annual Report on Form 10-K.

A discussion regarding our financial condition and results of operations for the years ended December 31, 2021 and 2020, including a year-to-year 

comparison between 2021 and 2020, is presented below. For a discussion regarding our financial condition and results of operations for the year ended 
December 31, 2019, including a year-to-year comparison between 2020 and 2019, refer to Part II, Item 7. "Management’s Discussion and Analysis of 
Financial Condition and Results of Operations" in our Annual Report on Form 10-K for the fiscal year ended December 31, 2020, filed with the SEC on 
March 2, 2021.

Overview

We are a microbiome therapeutics company developing a novel class of live biotherapeutic drugs, which are consortia of microbes designed to treat 

disease by modulating the microbiome to treat or reduce disease by repairing the function of a disease susceptible microbiome to a non-disease state. We 
have an advanced drug pipeline with late-stage clinical assets that are formulated for oral delivery and a differentiated microbiome therapeutics drug 
discovery and development platform including good manufacturing practices, or GMP, manufacturing capabilities for this novel drug modality. 

Our highest priority is preparing a biologics license application, or BLA, for submission to the U.S. Food and Drug Administration, or FDA, and 

preparing for potential commercialization of SER-109, an investigational oral microbiome therapeutic in development for recurrent Clostridioides difficile 
infection, or CDI. We intend to seek agreement with the FDA to begin a rolling BLA submission for SER-109 in the first half of 2022 and to finalize the 
submission with data from the safety database in mid-2022. SER-109 has obtained Breakthrough Therapy designation, and as a result, we expect priority 
review by the FDA.

We are also designing microbiome therapeutics to decolonize pathogens and modulate host function to reduce and prevent infections. We believe 

that the scientific and clinical data from our SER-109 program validate this novel approach, which we refer to as infection protection. We believe the 
infection protection approach may be replicable across different bacterial pathogens to develop microbiome therapeutics with the potential to protect a 
range of medically compromised patients from infections. We are evaluating SER-155 in a Phase 1b study in patients receiving allogeneic hematopoietic 
stem cell transplantation, or allo-HSCT, to reduce incidences of gastrointestinal infections, bloodstream infections and graft-versus-host disease, or GvHD. 
We are also evaluating additional preclinical stage programs in indications such as cancer neutropenia, solid organ transplant, and antimicrobial resistant 
infections more broadly. 

We continue to focus our resources on evaluating SER-301 in a Phase 1b study in patients with mild-to-moderate ulcerative colitis, or UC, and on 

analyzing additional biomarker data from our Phase 2b study evaluating SER-287 in patients with mild-to-moderate UC. In July 2021, we announced 
topline results from the SER-287 Phase 2b study, which did not meet its primary endpoint of improving clinical remission rates compared to placebo.  
Following the data readout, in December 2021, we completed preliminary microbiome drug pharmacology analyses that demonstrated the successful 
engraftment of SER-287 bacterial species. However, unlike the Phase 1b study, anticipated changes in disease-relevant metabolites post-administration 
with SER-287 in the Phase 2b study were not observed. In addition, we have completed preliminary analysis of data from the first cohort of the SER-301 
Phase 1b study, which included 15 subjects. Evaluation of the first cohort data by an independent Data Safety Monitoring Board indicated that it would be 
safe to proceed to the placebo-controlled second cohort. While efficacy was not a defined endpoint in the first cohort, evaluation of clinical outcome data 
collected as part of the study indicated that no subjects in the first cohort achieved clinical remission as defined by the FDA using the Three-Component 
Modified Mayo Score after 10 weeks of treatment, though there were improvements in one or more individual components (endoscopic, stool frequency 
and rectal bleeding subscores) in some patients. Strains in SER-301 were observed to engraft in subjects across the trial period, and based on the 
assessment of metabolomic data, SER-301 demonstrated pharmacological properties consistent with its design and led to baseline-dependent modulation of 
the metabolic landscape in the gastrointestinal tract of patients treated. We continue to conduct analyses of data from our SER-287 and SER-301 UC 
clinical stage programs to inform next steps for further development. 

In addition, we continue to evaluate opportunities to advance our technology in modulating host immunity to have an impact on and treat diseases 

such as cancer and various autoimmune diseases. 

Since our inception in October 2010, we have devoted substantially all of our resources to developing our programs, platforms, and technologies, 

building our intellectual property portfolio, developing our supply chain, business planning, raising capital and providing general and administrative 
support for these operations.

Many of our product candidates are still in preclinical development or early-stage discovery. Our ability to generate product revenue sufficient to 

achieve profitability will depend heavily on the successful development and eventual commercialization of one 

77

or more of our product candidates. Since our inception, we have incurred significant operating losses. Our net loss was $65.6 million for the year ended 
December 31, 2021. As of December 31, 2021, we had an accumulated deficit of $614.4 million and cash, cash equivalents and short- and long-term 
investments totaling $291.2 million.  Based on our current plans and forecasted expenses, we believe that our existing cash, cash equivalents and 
investments as of December 31, 2021 and proceeds, net of facility fees and expenses, of $27.6 million received in February 2022 in connection with the 
Second Amendment, will enable us to fund our operating expenses, debt service obligations and capital expenditure requirements for at least the next 12-
months from issuance of our consolidated financial statements included elsewhere in this Annual Report on Form 10-K.  

While we plan to focus our investment on our highest priority clinical programs in the near-term, our expenses may increase substantially in 

connection with our ongoing and planned activities, particularly as we:

•

•

•

•

•

•

•

•

•

•

•

complete the clinical development, seek regulatory approval, and prepare for commercialization of SER-109 for patients with recurrent CDI; 

re-evaluate the clinical development of SER-287 for the treatment of UC in light of the Phase 2b clinical study results and in conjunction 
with the additional microbiome biomarker data; 

continue the clinical development of SER-301 for the treatment of UC;

continue the clinical development of SER-155 to address gastrointestinal infections, bacteremia and graft-versus-host disease;

make strategic investments in our research discovery and development platforms and capabilities, including identifying candidates for 
additional disease indications;

make strategic investments in manufacturing capabilities;

maintain and augment our intellectual property portfolio and opportunistically acquire complementary intellectual property;

potentially establish a sales and distribution infrastructure and scale-up manufacturing capabilities to commercialize any products for which 
we may obtain regulatory approval;

perform our obligations under our agreements with our collaborators;

seek to obtain regulatory approvals for our product candidates; and

experience any delays or encounter any issues with any of the above, including but not limited to failed studies, complex results, safety issues 
or other regulatory challenges.

In addition, if we obtain marketing approval for any of our product candidates, we expect to incur significant commercialization expenses related to 
product manufacturing, marketing, sales and distribution. Furthermore, we expect to continue to incur additional costs associated with operating as a public 
company.

As a result, we will need additional financing to support our continuing operations. Until such time as we can generate significant revenue from 

product sales, if ever, we expect to finance our operations through a combination of public or private equity or debt financings or other sources, which may 
include collaborations with third parties. Adequate additional financing may not be available to us on acceptable terms, or at all. For example, the trading 
prices for our and other biopharmaceutical companies’ stock have been highly volatile as a result of the COVID-19 pandemic. As a result, we may face 
difficulties raising capital through sales of our common stock and any such sales may be on unfavorable terms. Our inability to raise capital as and when 
needed would have a negative impact on our financial condition and our ability to pursue our business strategy.  We will need to generate significant 
revenue to achieve profitability, and we may never do so. 

Impact of the COVID-19 Pandemic

We are monitoring the ongoing impacts of the COVID-19 pandemic and have taken steps to identify and mitigate the adverse impacts on, and risks 

to, our business posed by its spread and actions taken by governmental and health authorities to address it. The spread of COVID-19 has caused us to 
modify our business practices, including implementing a work from home policy for all employees who are able to perform their duties remotely and 
restricting all nonessential travel, and we expect to continue to take actions as may be required or recommended by government authorities or as we 
determine are in the best interests of our employees, and other business partners in light of COVID-19. The impact of COVID-19 on our future results will 
largely depend on future developments, which are highly uncertain and cannot be predicted with confidence, such as the ultimate geographic spread of the 
disease, the duration and severity of the pandemic, the impact of variants, travel restrictions and social distancing recommendations and regulations in the 
United States and other countries, business closures or business disruptions, the ultimate impact on financial markets and the global economy, the 
effectiveness and uptake of vaccines and vaccine distribution efforts and the effectiveness of other actions taken in the United States and other countries to 
contain and treat the disease. See “Risk Factors—Risks Related to Our Operations—The COVID-19 pandemic has adversely impacted and could continue 
to adversely impact, our business, including our 

78

preclinical studies and clinical trials, results of operations and financial condition” in Part I, Item 1A of this Annual Report on Form 10-K.  

SER-109

SER-109 is an oral microbiome therapeutic candidate consisting of a consortium of purified Firmicutes spores. The SER-109 manufacturing 
purification process is designed to remove unwanted microbes in an effort to reduce the risk of pathogen transmission beyond donor screening alone.  SER-
109 is designed to reduce recurrent CDI in patients with a history of CDI by modulating the microbiome to a state that resists C. difficile germination and 
growth. SER-109, if approved, is designed to treat individuals with recurrent CDI, a patient population which includes approximately 170,000 cases per 
year in the United States.

The Phase 3 ECOSPOR III study was a multicenter, randomized, placebo-controlled study that enrolled 182 patients with multiply recurrent CDI. 

All patients who entered ECOSPOR III must have tested positive for C. difficile toxin. This inclusion criterion was implemented in an effort to ensure 
enrollment of only patients with active infection rather than simple colonization. The study was designed to evaluate patients for 24 weeks, with the 
primary endpoint comparing the C. difficile recurrence rate in subjects who received SER-109 verses placebo at up to eight weeks after dosing.

Previously reported topline data demonstrated that the study achieved its primary endpoint where SER-109 was superior to placebo in reducing CDI 

recurrence at eight weeks, reflecting a sustained clinical response rate of approximately 88% at eight weeks post-treatment. SER-109 resulted in a 27% 
absolute reduction of recurrence of CDI compared to placebo at eight weeks post-treatment, which is a relative risk reduction of 68%. The number-needed-
to treat was 3.6. The rate of recurrence at 12 weeks in the SER-109 arm was 18.0%, compared to a rate of 46.2% in the placebo arm, representing an 
absolute risk reduction of 28% (relative risk 0.40; 95% CI 0.24-0.65; p <0.001 and p< 0.002 for the test sequence), and thereby consistent with the results 
seen at eight weeks.  Results across stratifications of age and antibiotics remained similar. The study’s efficacy results related to the primary endpoint from 
all analyses exceeded the statistical threshold previously provided in consultation with the FDA that could allow this single clinical study to fulfill efficacy 
requirements for a BLA.  The efficacy remained durable through 24 weeks of follow-up, as SER-109 was observed to significantly reduced recurrence rates 
compared to placebo over 24 weeks, 21.3% vs. 47.3%, respectively. In January 2022, these data were published in the New England Journal of Medicine 
(N Engl J Med 2022;386(3):220-229).

We believe the SER-109 safety results across completed studies have been favorable, with an adverse event profile comparable to placebo. In 
September 2021, we achieved target enrollment of 300 subjects with the ECOSPOR IV open-label study. The target enrollment of a minimum of 300 
subjects for the SER-109 safety database was reached in conjunction with a prior completed Phase 3 study, ECOSPOR III. Seres is required by the FDA to 
demonstrate safety of SER-109 in at least 300 subjects who have received the dose to be commercialized, consistent with standard FDA guidance, with a 
24-week follow-up period, to support a BLA submission. The ECOSPOR IV open-label study includes patients with recurrent CDI, including individuals 
with a first recurrence of CDI. We intend to seek agreement with the FDA to begin a rolling BLA submission for SER-109 in the first half of 2022 and 
finalize the submission with data from the safety database in mid-2022. SER-109 has obtained Breakthrough Therapy designation, and as a result, we 
expect priority review by the FDA. 

In November 2021, we initiated a SER-109 expanded access program across the United States. The program is designed to enable eligible adults 

with recurrent CDI to obtain access to SER-109 prior to a potential FDA product approval. 

SER-155

SER-155, an oral microbiome therapeutic candidate consisting of a consortium of cultivated bacteria, is designed to decrease infection and 

translocation of antibiotic resistant bacteria in the gastrointestinal tract and modulate host immune responses to decrease GvHD. The rationale for this 
program is based in part on published clinical evidence from our collaborators at Memorial Sloan Kettering Cancer Center showing that allo-HSCT patients 
with decreased diversity of commensal microbes are significantly more likely to die due to infection and/or lethal GvHD. SER-155 was designed using our 
reverse translational discovery platform to reduce incidences of gastrointestinal infections, bloodstream infections and GvHD in patients receiving allo-
HSCT.  The SER-155 Phase 1b study is designed to include approximately 70 patients in both an open-label and a randomized, double-blind, placebo-
controlled cohort that will evaluate safety and tolerability before and after HSCT.  Additionally, the engraftment of SER-155 bacteria (a measure of 
pharmacokinetics) and the efficacy of SER-155 in preventing infections and GvHD will be evaluated. In November 2021, we enrolled the first patient in 
the SER-155 Phase 1b study.

SER-287

SER-287, an oral microbiome therapeutic candidate consisting of a consortium of purified Firmicutes spores, is designed to restore a healthy 
gastrointestinal microbiome in individuals with UC. There are over 700,000 UC patients in the United States and fewer than one-third of patients on current 
therapies achieve remission.  Approved treatments are often inadequate to control disease activity and are often associated with significant side effects, 
including immunosuppression. SER-287 has been granted Fast Track Designation by the FDA for the induction and maintenance of clinical remission in 
adult subjects with active mild-to-moderate UC.  SER-287 has been designated an Orphan Drug for pediatric UC by the FDA.

79

In July 2021, we announced topline results from the Phase 2b study evaluating SER-287 in patients with mild-to-moderate UC.  The study did not 
meet its primary endpoint of improving clinical remission rates compared to placebo. The primary objective of the induction portion of the Phase 2b study 
was to evaluate the safety and efficacy of SER-287, after 10 weeks of induction dosing (following vancomycin pre-conditioning) in achieving clinical 
remission in participants with mild-to-moderate UC.  The trial was a randomized, placebo controlled, double blind, parallel group multicenter study which 
enrolled 203 UC patients at approximately 100 sites throughout the U.S. and Canada.  Dosing was explored in two SER-287 cohorts (full induction dose 
and step-down induction dose) versus placebo and patients were randomized according to a  1:1:1 ratio.  Clinical remission was analyzed and defined by a 
3-component modified Mayo Score.  No statistically significant differences were observed in absolute clinical remission rates between the three treatment 
arms (10.3% for the full induction dose, n=68 and 10.6% for the step-down induction dose, n=66 versus 11.6% for placebo, n=69).  There were also no 
statistically significant differences observed across the three treatment groups for endoscopic improvement, endoscopic remission or symptomatic 
remission.

Both dosing regimens of SER-287 were generally well tolerated.  Treatment emergent adverse events, or AEs, were observed in 67.6%, 46.2% and 

50.7% of subjects in the induction dose, step-down dose (both of which included six days of oral vancomycin preconditioning) and placebo treatment arms, 
respectively.  The majority of observed AEs were mild or moderate in severity.  The most commonly observed AEs were UC, diarrhea, nausea and 
abdominal distension.  Four participants on active treatment reported serious treatment emergent adverse events (worsening UC, colonic dysplasia, 
congestive heart failure with decreased hemoglobin, and appendicitis), as did one on placebo (worsening UC).

Given the lack of a clinical efficacy signal identified in the Phase 2b study, we have closed the open label and maintenance portions of the study.  

In December 2021, we completed preliminary microbiome drug pharmacology analyses from the Phase 2b study that demonstrated the successful 
engraftment of SER-287 bacterial species. Based on the SER-287 Phase 2b microbiome data analyses, engraftment of SER-287 bacteria, measured as the 
median number of bacteria observed across patients post treatment, was statistically significant in patients receiving SER-287 versus placebo (p ≤ 0.001 at 
all timepoints). The magnitude and kinetics of engraftment were comparable to our Phase 1b study. However, unlike the Phase 1b study, anticipated 
changes in disease-relevant metabolites post-administration with SER-287 in the Phase 2b study were not observed. Analysis of the genomic and 
metabolomic data characterizing the microbiome of SER-287 study participants at baseline and post dosing suggest potential biomarkers for inclusion of 
targeted patient subpopulations in future development efforts. 

We continue to conduct analyses of data from our SER-287 and SER-301 UC clinical stage programs to inform next steps for further development.

SER-301 

SER-301 is an oral microbiome therapeutics candidate comprised of a consortium of cultivated bacteria for the treatment of mild-to-moderate UC. 

SER-301 is a consortium of cultivated bacteria designed using our reverse translational discovery platform that incorporates analysis of microbiome 
biomarkers from human clinical data and preclinical assessments using human cell-based assays and in vitro/ex vivo and in vivo disease models. The design 
of SER-301 incorporates insights obtained from the SER-287 Phase 1b clinical and microbiome results, as well as from our clinical portfolio more broadly, 
and additional functional data from preclinical assessments, in an effort to optimize desired pharmacological properties.

SER-301 is designed to reduce induction of pro-inflammatory activity, improve epithelial barrier integrity and TNF-α driven inflammation in 
intestinal epithelial cells, or IECs, and modulate UC-relevant anti-inflammatory, innate and adaptive immune pathways. SER-301 is being produced by our 
advanced fermentation, formulation and delivery platforms.  It includes strains delivered in spore form, as well as strains fermented in non-spore 
(vegetative) form and delivered using enterically-protected technology designed to release in the colon. 

The SER-301 Phase 1b study is being conducted in Australia and New Zealand in subjects with mild-to-moderate UC and is designed to include 
approximately 65 patients distributed across two cohorts. In November 2020 we enrolled the first patient in the SER-301 Phase 1b study. As a result of 
enrolling the first patient in the clinical study, we received a $10.0 million milestone payment under our collaboration and license agreement, or the 2016 
License Agreement, with Société des Produits Nestlé S.A., or, together with NHSc Pharma Partners, Nestlé, successor in interest to Nestec, Ltd.

We have completed preliminary analysis of data from the first cohort of the SER-301 Phase 1b study, which included 15 subjects. Evaluation of the 
first cohort data by an independent Data Safety Monitoring Board indicated that it would be safe to proceed to the placebo-controlled second cohort. While 
efficacy was not a defined endpoint in the first cohort, evaluation of clinical outcome data collected as part of the study indicated that no subjects in the first 
cohort achieved clinical remission as defined by the FDA using the Three-Component Modified Mayo Score after 10 weeks of treatment, though there 
were improvements in one or more individual components (endoscopic, stool frequency and rectal bleeding subscores) in some patients. Strains in SER-
301 were observed to engraft in subjects across the trial period with the number of engrafting strains exceeding expectations at multiple sampling time 
points. A dual formulation was evaluated in the first cohort and the extent of engraftment across subjects was correlated with whether 

80

bacteria were formulated as bacterial spores versus vegetative strains; the former demonstrating stronger engraftment across all patients.

Based on the assessment of metabolomic data, SER-301 demonstrated pharmacological properties consistent with its design and led to baseline-

dependent modulation of the metabolic landscape in the gastrointestinal tract of patients treated; changes were observed in short-chain and medium-chain 
fatty acids, tryptophan-derived metabolites, bile acids, and other microbe-associated metabolites, as well as host metabolites associated with a non-disease 
state. These SER-301 metabolomic results were encouraging compared with the results observed in the SER-287 Phase 2b study, in which the metabolic 
changes were not observed in general across subjects administered with SER-287. Additionally, changes in disease-relevant metabolites in SER-301 were 
observed to be greater in a definable subpopulation of patients. 

The degree of metabolic changes observed following SER-301 administration appeared to be dependent on the baseline metabolic profile of the 

study subjects, providing support for the potential for microbiome therapeutics to be developed in biomarker-identified UC patient subpopulations. 

We continue to conduct analyses of data from our SER-287 and SER-301 UC clinical stage programs to inform next steps for further development.

SER-401

In March 2021, we announced that we, in collaboration with study partners, The Parker Institute for Cancer Immunotherapy and The University of 

Texas MD Anderson Cancer Center, voluntarily discontinued further enrollment of our study evaluating the safety and drug activity of SER-401 or fecal 
microbiota transplant, or FMT, in combination with nivolumab in patients with metastatic melanoma.

A preliminary analysis of results from 10 subjects who received either SER-401 or placebo in combination with nivolumab indicated that SER-401 

was safe and well-tolerated. There were no patients enrolled in the FMT portion of the study. Subjects currently enrolled in the study will complete the 
study protocol. Given challenges in enrollment due to the COVID-19 pandemic, subsequent anticipated time to study completion, and progress in our 
preclinical oncology pipeline, we have decided to deprioritize further development of SER-401. We will continue to advance our research and development 
efforts in cancer, applying learnings from the SER-401 trial.

Patent Portfolio

Intellectual Property

We have an extensive patent portfolio directed to rationally designed ecologies of spores and microbes. The portfolio includes both company-owned 

patents and applications, and those that we have rights to as licensee. For example, our portfolio includes an option to license foundational intellectual 
property related to the use of bacteria in combination with checkpoint inhibitors from MD Anderson. The patents and applications included in our portfolio 
cover both composition of matter and methods (e.g., method of treating). Our intellectual property rights related to SER-109 (C. difficile) and SER-287 
(ulcerative colitis) extend through 2034. We plan on continuing to broaden our patent portfolio. Currently, we have 24 active patent application families, 
which includes 21 nationalized applications and three pending at the PCT stage. To date, we have obtained 18 issued U.S. patents and one U.S. patent 
application that has been allowed. 

Regulatory Exclusivity

If we obtain marketing approval for any of our product candidates, we expect to receive marketing exclusivity against biosimilar products. For a 

new biological composition approved by the FDA, a 12-year period of exclusivity in the United States may be obtained. In Europe, the European 
Medicines Agency awards 10 years of exclusivity for new molecular entities.

Revenue 

Financial Operations Overview

To date we have not generated any revenues from the sale of products.  Our revenues have been derived primarily from our agreements with our 

collaborators. See “—Liquidity and Capital Resources.”

Operating Expenses

Our operating expenses since inception have consisted primarily of research and development activities and general and administrative costs.

81

Research and Development Expenses

Research and development expenses consist primarily of costs incurred for our research activities, including our discovery efforts and the 

development of our product candidates, which include:

•

•

•

•

•

•

expenses incurred under agreements with third parties, including contract research organizations, or CROs, that conduct research, pre-clinical 
activities and clinical trials on our behalf as well as contract manufacturing organizations that manufacture drug products for use in our pre-
clinical and clinical trials;

salaries, benefits and other related costs, including stock-based compensation expense, for personnel in our research and development 
functions;

costs of outside consultants, including their fees, stock-based compensation and related travel expenses;

the cost of laboratory supplies and acquiring, developing and manufacturing pre-clinical study and clinical trial materials;

costs related to compliance with regulatory requirements; and

facility-related expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of facilities and other 
operating costs.

We expense research and development costs as incurred. We recognize external development costs based on an evaluation of the progress to 
completion of specific tasks using information provided to us by our vendors and our clinical investigative sites. Payments for these activities are based on 
the terms of the individual agreements, which may differ from the pattern of costs incurred, and are reflected in our financial statements as prepaid or 
accrued research and development expenses.

Our primary focus of research and development since inception has been on our microbiome therapeutics platform and the subsequent development 

of our product candidates. Our direct research and development expenses are tracked on a program-by-program basis and consist primarily of external 
costs, such as fees paid to investigators, consultants, CROs in connection with our pre-clinical studies and clinical trials, lab supplies and consumables, and 
regulatory fees. We do not allocate employee-related costs and other indirect costs to specific research and development programs because these costs are 
deployed across multiple product programs under development and, as such, are classified as costs of our microbiome therapeutics platform research, along 
with external costs directly related to our microbiome therapeutics platform.

Research and development activities are central to our business model. Product candidates in later stages of clinical development generally have 

higher development costs than those in earlier stages of clinical development, primarily due to the increased size and duration of later-stage clinical trials. 
We expect that our research and development expenses will continue to increase in the foreseeable future as we complete clinical development, seek 
regulatory approval, and prepare for commercialization of SER-109, re-evaluate the clinical development of SER-287, continue to discover and develop 
additional product candidates, including SER-301 and SER-155 and pursue later stages of clinical development of our product candidates.

General and Administrative Expenses

General and administrative expenses consist primarily of salaries and other related costs, including stock-based compensation, for personnel in our 
executive, finance, corporate, commercial, and business development and administrative functions. General and administrative expenses also include legal 
fees relating to patent and corporate matters; professional fees for accounting, auditing, tax and consulting services; insurance costs; travel expenses; and 
facility-related expenses, which include direct depreciation costs and allocated expenses for rent and maintenance of facilities and other operating costs.

We expect that our general and administrative expenses will increase in the future as we increase our headcount to support the potential growth in 
our research and development activities and the potential commercialization of our product candidates, and as we conduct pre-launch activities to prepare 
for commercialization of SER-109. We also may continue to incur increased expenses associated with being a public company, including increased costs of 
accounting, audit, legal, regulatory and tax-related services associated with maintaining compliance with exchange listing and the requirements of the 
Securities and Exchange Commission, director and officer insurance costs and investor and public relations costs.

Collaboration (Profit) Loss Sharing - related party

Collaboration (profit) loss sharing – related party includes 50% sharing of the profit or loss related to the pre-launch activities and 

commercialization activities associated with the license agreement that we entered into with NHSc Pharma Partners (Nestle) in July 2021 as discussed in 
Note 12 to our consolidated financial statements. 

Other (Expense) Income, Net

Interest (Expense) Income, Net

Interest income consists of interest earned on our cash, cash equivalents and investments.

Interest expense consists of interest incurred under our loan and security agreement with Hercules.

82

Other (Expense) Income 

Other (expense) income primarily consists of amortization of premiums on investments, offset by sublease income.

Income Taxes

Since our inception in 2010, we have not recorded any U.S. federal or state income tax benefits for the net losses we have incurred in each year or 
our earned research and development tax credits, due to our uncertainty of realizing a benefit from those items. As of December 31, 2021, we had federal 
and state net operating loss carryforwards of $402.5 million and $394.1 million, respectively, both of which begin to expire in 2035. As of December 31, 
2021, we also had federal and state research and development tax credit carryforwards of $43.7 million and $11.9 million, respectively, which begin to 
expire in 2031 and 2028, respectively. The federal research and development tax credits include an orphan drug credit carryforward of $23.7 million.

Critical Accounting Policies and Significant Judgments and Estimates

Our consolidated financial statements are prepared in accordance with generally accepted accounting principles, or GAAP, in the United States. The 

preparation of our consolidated financial statements and related disclosures requires us to make estimates and assumptions that affect the reported amount 
of assets, liabilities, revenue, costs and expenses and related disclosures. We believe that the estimates and assumptions involved in the accounting policies 
described below may have the greatest potential impact on our consolidated financial statements and, therefore, consider these to be our critical accounting 
policies. We evaluate our estimates and assumptions on an ongoing basis. Our actual results may differ from these estimates under different assumptions 
and conditions.

Revenue Recognition

We recognize revenue in accordance with the guidance under ASC 606, Revenue from Contracts with Customers. ASC 606 applies to all contracts 

with customers, except those contracts that are within the scope of other guidance, such as leases, insurance, and financial instruments. We enter into 
agreements that are within the scope of ASC 606, under which we license certain of our product candidates and perform research and development services 
in connection with such arrangements. The terms of these arrangements typically include payment of one or more of the following: nonrefundable up-front 
fees, reimbursement of research and development costs, development, clinical, regulatory and commercial sales milestone payments, and royalties on net 
sales of licensed products.  Under ASC 606, we recognize revenue when our customer obtains control of promised goods or services, in an amount that 
reflects the consideration which we expect to receive in exchange for those goods or services. When determining the timing and extent of revenue 
recognition for arrangements that we determine are within the scope of ASC 606, we perform the following five steps: 

(i)

(ii)

(iii)

(iv)

(v)

identify the contract(s) with a customer; 

identify the performance obligation(s) in the contract; 

determine the transaction price; 

allocate the transaction price to the performance obligation(s) in the contract; and 

recognize revenue when (or as) the entity satisfies a performance obligation. 

We only apply the five-step model to contracts when it is probable that we will collect the consideration to which we are entitled in exchange for the 

goods or services transferred to our 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 the 

contract to determine whether each promised good or service is a performance obligation. The promised goods or services in our arrangements typically 
consist of a license to our intellectual property and/or research and development services. We may provide options to additional items in such 
arrangements, which are accounted for as separate contracts when our customer elects to exercise such options, unless the option provides a material right 
to our customer.  Performance obligations are promises in a contract to transfer a distinct good or service to our customer that (i) our customer can benefit 
from on its own or together with other readily available resources, and (ii) is separately identifiable from other promises in the contract. Goods or services 
that are not individually distinct performance obligations are combined with other promised goods or services until such combined group of promises meets 
the requirements of a performance obligation. 

We determine transaction price based on the amount of consideration we expect to receive for transferring the promised goods or services in the 
contract. Consideration may be fixed, variable, or a combination of both. At contract inception for arrangements that include variable consideration, we 
estimate the probability and extent of consideration we expect to receive under the contract utilizing either the most likely amount method or expected 
amount method, whichever best estimates the amount expected to be received. We then consider any constraints on the variable consideration and include 
in the transaction price variable consideration to the extent it is deemed probable that a significant reversal in the amount of cumulative revenue recognized 
will not occur when the uncertainty associated with the variable consideration is subsequently resolved.  

We then allocate the transaction price to each performance obligation based on the relative standalone selling price and recognize as revenue the 

amount of the transaction price that is allocated to the respective performance obligation when (or as) control is transferred to our customer and the 
performance obligation is satisfied. For performance obligations which consist of licenses and 

83

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. We evaluate the measure of progress 
each reporting period and, if necessary, adjust the measure of performance and related revenue recognition.

We record amounts as accounts receivable when the right to consideration is deemed unconditional. When consideration is received, or such 

consideration is unconditionally due, from our customer prior to transferring goods or services to our customer under the terms of a contract, a contract 
liability is recorded for deferred revenue.

We do not assess whether a contract has a significant financing component if the expectation at contract inception is that the period between 

payment by our customer and the transfer of the promised goods or services to our customer will be one year or less. Incremental costs of obtaining a 
contract are expensed as and when incurred if the expected period over which we would have amortized the asset is one year or less, or the amount is 
immaterial.

Collaboration Revenue 

Arrangements with collaborators may include licenses to intellectual property, research and development services, manufacturing services for 
clinical and commercial supply, and participation on joint steering committees. We evaluate the promised goods or services to determine which promises, 
or group of promises, represent performance obligations. In contemplation of whether a promised good or service meets the criteria required of a 
performance obligation, we consider the stage of development of the underlying intellectual property, the capabilities and expertise of our customer relative 
to the underlying intellectual property, and whether the promised goods or services are integral to or dependent on other promises in the contract. When 
accounting for an arrangement that contains multiple performance obligations, we must develop judgmental assumptions, which may include market 
conditions, reimbursement rates for personnel costs, development timelines and probabilities of regulatory success to determine the stand-alone selling 
price for each performance obligation identified in the contract.  

When we conclude that a contract should be accounted for as a combined performance obligation and recognized over time, we must then determine 

the period over which revenue should be recognized and the method by which to measure revenue. We generally recognize revenue using a cost-based 
input method. 

Licenses of Intellectual Property

If a license to our intellectual property is determined to be distinct from the other performance obligations identified in the arrangement, we 
recognize revenue allocated to the license when the license is transferred to our customer and our customer is able to use and benefit from the license.  For 
licenses that are bundled 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 associated with the bundled performance obligation.  We evaluate the measure of progress each reporting period and, if necessary, 
adjust the measure of progress and related revenue recognition.

Milestone Payments

At the inception of each arrangement that includes developmental and regulatory milestone payments, we evaluate whether the achievement of each 
milestone specifically relates to our efforts to satisfy a performance obligation or transfer a distinct good or service within a performance obligation. If the 
achievement of a milestone is considered a direct result of our efforts to satisfy a performance obligation or transfer a distinct good or service and the 
receipt of the payment is based upon the achievement of the milestone, the associated milestone value is allocated to that distinct good or service, otherwise 
it will be allocated to all performance obligations of the arrangement based on the initial allocation. 

We evaluate each milestone to determine when and how much of the milestone to include in the transaction price.  We first estimate the amount of 
the milestone payment that we could receive using either the expected value or the most likely amount approach. We primarily use the most likely amount 
approach as that approach is generally most predictive for milestone payments with a binary outcome. Then, we consider whether any portion of that 
estimated amount is subject to the variable consideration constraint (that is, whether it is probable that a significant reversal of cumulative revenue would 
not occur upon resolution of the uncertainty). We update the estimate of variable consideration included in the transaction price at each reporting date 
which includes updating the assessment of the likely amount of consideration and the application of the constraint to reflect current facts and 
circumstances.

Royalties

For arrangements that include sales-based royalties, including milestone payments based on the 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 revenue related to 
sales-based royalties or milestone payments based on the level of sales.

84

Manufacturing Supply Services

For arrangements that include a promise of supply of clinical or commercial product, we determine if the supply is a promise in the contract or a 

future obligation at our customer’s option. If determined to be a promise at inception of the contract, we evaluate the promise to determine whether it is a 
separate performance obligation or a component of a bundled performance obligation. If determined to be an option, we determine if the option provides a 
material right to our customer and if so, account for the option as a separate performance obligation. If determined to be an option but not a material right, 
we account for the option as a separate contract when our customer elects to exercise the option.

Application of the above guidance requires significant judgment and requires us to make determinations based on the facts and circumstances under 

each arrangement. 

Accrued Research and Development Expenses

As part of the process of preparing our consolidated financial statements, we are required to estimate our accrued research and development 

expenses. This process involves reviewing open contracts and purchase orders, communicating with our personnel to identify services that have been 
performed on our behalf and estimating the level of service performed and the associated costs incurred for the services when we have not yet been 
invoiced or otherwise notified of the actual costs. The majority of our service providers invoice us in arrears for services performed, on a pre-determined 
schedule or when contractual milestones are met; however, some require advanced payments. We make estimates of our accrued expenses as of each 
balance sheet date in our financial statements based on facts and circumstances known to us at that time. Examples of estimated accrued research and 
development expenses include fees paid to:

•

•

•

•

CROs in connection with performing research services on our behalf and clinical trials;

investigative sites or other providers in connection with clinical trials;

vendors in connection with preclinical and clinical development activities; and

vendors related to product manufacturing, development and distribution of preclinical and clinical supplies.

We base our expenses related to preclinical studies and clinical trials on our estimates of the services received and efforts expended pursuant to 
quotes and contracts with multiple CROs that conduct and manage clinical trials on our behalf. The financial terms of these agreements are subject to 
negotiation, vary from contract to contract and may result in uneven payment flows. There may be instances in which payments made to our vendors will 
exceed the level of services provided and result in a prepayment of the clinical expense. Payments under some of these contracts depend on factors such as 
the successful enrollment of patients and the completion of clinical trial milestones. In accruing service fees, we estimate the time period over which 
services will be performed, enrollment of patients, number of sites activated and the level of effort to be expended in each period. If the actual timing of the 
performance of services or the level of effort varies from our estimate, we adjust the accrual or amount of prepaid expense accordingly. Although we do not 
expect our estimates to be materially different from amounts actually incurred, our understanding of the status and timing of services performed relative to 
the actual status and timing of services performed may vary and may result in us reporting amounts that are too high or too low in any particular period. To 
date, we have not made any material adjustments to our prior estimates of accrued research and development expenses.

85

Comparison of the Years Ended December 31, 2021 and 2020

The following table summarizes our results of operations for the years ended December 31, 2021 and 2020. 

Results of Operations

Revenue:

Collaboration revenue - related party
Grant revenue
Collaboration revenue

Total revenue

Operating expenses:

Research and development
General and administrative
Collaboration (profit) loss sharing - related party

Total operating expenses

Loss from operations
Other (expense) income:

Interest income
Interest expense
Other (expense) income

Total other (expense) income, net

Net loss

Revenue 

Year Ended
December 31,

2021

2020
(in thousands)

Change

143,857     $
1,070      
—      
144,927      

141,891      
69,261      
(1,732 )    
209,420      
(64,493 )    

2,870      
(2,910 )    
(1,045 )    
(1,085 )    
(65,578 )   $

11,897     $
4,157      
17,161      
33,215      

90,570      
30,775      
—      
121,345      
(88,130 )    

946      
(2,924 )    
981      
(997 )    
(89,127 )   $

131,960  
(3,087 )
(17,161 )
111,712  

51,321  
38,486  
(1,732 )
88,075  
23,637  

1,924  
14  
(2,026 )
(88 )
23,549  

  $

  $

Total revenue was $144.9 million and $33.2 million for the years ended December 31, 2021 and 2020, respectively.  The increase in total revenue of 

$111.7 million is primarily driven by an increase in related party collaboration revenue due to the recognition of revenue for the license we granted to 
Nestlé under the 2021 License Agreement and related transfer of control of the license. The increase in related party collaboration revenue was partially 
offset by a decrease of $17.2 million in collaboration revenue associated with our Research Agreement with MedImmune, a wholly owned subsidiary of 
AstraZeneca Inc.  The decrease in collaboration revenue in fiscal 2021 was due to AstraZeneca’s election to terminate the Research Agreement in 
December 2020.  As the Research Agreement was terminated in December 2020, no collaboration revenue was recognized in fiscal 2021.   

Research and Development Expenses

Microbiome therapeutics platform
SER-109
SER-287
Early stage programs
Total direct research and development expenses
Personnel-related (including stock-based compensation)

Total research and development expenses

86

2021

34,784     $
40,510      
9,881      
4,953      
90,128      
51,763      
141,891     $

  $

  $

Year Ended
December 31,
2020
(in thousands)

25,748    $
14,939     
16,347     
5,323     
62,357     
28,213     
90,570    $

Change

9,036  
25,571  
(6,466 )
(370 )
27,771  
23,550  
51,321  

 
 
 
   
 
 
 
 
   
   
 
 
 
 
 
     
     
   
   
   
   
 
     
     
   
   
   
   
   
   
 
     
     
   
   
   
   
   
 
 
 
 
 
 
 
   
   
 
 
 
 
   
   
   
   
   
 
Research and development expenses were $141.9 million for the year ended December 31, 2021, compared to $90.6 million for the year ended 

December 31, 2020. The increase of $51.3 million was due primarily to the following:

•

•

•

•

•

an increase of $9.0 million in research expenses related to our microbiome therapeutics platform due primarily to an increase of $3.6 million 
in external consulting expenses and $5.6 million in facilities costs, lab supplies, and consumables; 

an increase of $25.6 million in expenses related to our SER-109 program, due primarily to an increase of $6.4 million in clinical trial 
expenses, an increase of $6.8 million in facilities costs, lab supplies, and consumables, an increase of $8.7 million in external consulting 
expenses and an increase of $3.1 million in contract manufacturing costs; 

a decrease of $6.5 million in expenses of our SER-287 program primarily driven by a decrease of $4.8 million in clinical trial expenses and 
$1.5 million in facilities costs, lab supplies, and consumables;

a decrease of $0.4 million in expenses of our early stage programs primarily driven by a decrease in external consulting expenses, partially 
offset by an increase in clinical trial expenses.

an increase in personnel-related costs of $23.6 million primarily due to an increase of $18.2 million in salaries, payroll taxes and employee 
benefit expenses and a $5.4 million increase in stock-based compensation expense as a result of increased headcount; and

We expect that our research and development expenses will increase in the foreseeable future as we advance the clinical development of SER-109, 

SER-301, and SER-155, re-evaluate the clinical development of SER-287 in light of clinical study results and in conjunction with the additional 
microbiome biomarker data, and continue to discover and develop additional product candidates and pursue later stages of clinical development of our 
product candidates.

General and Administrative Expenses

Personnel-related (including stock-based compensation)
Professional fees
Facility-related and other

Total general and administrative expenses

Year Ended
December 31,

2021

2020
(in thousands)

Change

  $

  $

23,933     $
33,754      
11,574      
69,261     $

11,078     $
13,781      
5,916      
30,775     $

12,855  
19,973  
5,658  
38,486  

General and administrative expenses were $69.3 million for the year ended December 31, 2021, compared to $30.8 million for the year ended 

December 31, 2020. The increase of $38.5 million was primarily due to the following:

•

•

•

an increase in personnel-related costs of $12.9 million primarily due to an increase of $6.1 million in salaries, payroll taxes and employee 
benefit expenses, and a $6.0 million increase in stock-based compensation expense; and

an increase in professional fees of $20.0 million primarily due to a $15.7 million increase in professional service and consulting fees and pre-
launch commercial expenses and a $2.4 million increase in recruiting fees. 

an increase in facility-related and other costs of $5.7 million due primarily to increases in IT-related expenses of $3.7 million and lab and 
office supplies of $2.1 million.

Collaboration (Profit) Loss Sharing - related party

Collaboration (profit) loss sharing – related party was $1.7 million of income to us for the year ended December 31, 2021. There was no 
collaboration (profit) loss sharing for the year ended December 31, 2020. For the year ended December 31, 2021 we incurred $5.6 million of pre-launch 
expenses which we recorded within research and development expense or general and administrative expense based on the nature of the underlying 
expense. Our collaborative partner incurred $2.0 million of pre-launch expenses for the year ended December 31, 2021. Therefore, the $1.7 million of 
income recorded represents the sharing of 50% of the pre-launch expenses and represents income to us because we performed more of the pre-launch 
activities than our collaborative partner. 

Other (Expense) Income, Net

Other (expense) income, net was $1.1 million of expense for the year ended December 31, 2021 and $1.0 million of income for the year ended 

December 31, 2020. 

87

 
 
 
   
 
 
 
 
   
   
 
 
 
 
   
   
 
Liquidity and Capital Resources

Since our inception, we have generated revenue only from collaborations and have incurred recurring net losses. We anticipate that we will 
continue to incur losses for at least the next several years. Our research and development and general and administrative expenses may continue to increase 
and, as a result, we will need additional capital to fund our operations, which we may obtain from additional financings, public offerings, research funding, 
additional collaborations, contract and grant revenue or other sources.

In August 2020, we completed an underwritten public offering in which we sold 10,500,000 shares of our common stock at a public offering price 

of $21.50 per share. In addition, we granted the underwriters a 30-day option to purchase up to an additional 1,575,000 shares of its common stock at the 
public offering price, less underwriting discounts and commissions, which the underwriters exercised in full. We received aggregate net proceeds from the 
offering of approximately $243.7 million after deducting underwriting discounts and commissions and offering expenses payable by us.

In August 2020, we entered into a Securities Purchase Agreement with Nestlé for the sale of 959,002 shares of our common stock at a purchase 

price of $20.855 per share (the “concurrent placement”). We received aggregate net proceeds from the concurrent placement of approximately $19.9 
million after deducting offering expenses payable by us.

In November 2019, we entered into a common stock sales agreement, or the 2019 Sales Agreement, with Cowen to sell shares of our common stock 

with aggregate gross sales proceeds of up to $25.0 million, from time to time, through an "at the market" equity offering program, or ATM, under which 
Cowen acts as sales agent.  In March 2020, in connection with filing an updated registration statement on Form S-3 (File No. 333-237033), we entered into 
a new common stock sales agreement, or the 2020 Sales Agreement, with Cowen on substantially the same terms as the 2019 Sales Agreement and 
terminated the 2019 Sales Agreement. In May 2021, we entered into a new common stock sales agreement, or the 2021 Sales Agreement, with Cowen to 
sell shares of our common stock with aggregate gross sales proceeds of up to $150.0 million, from time to time, through an ATM under which Cowen acts 
as sales agent, and terminated the 2020 Sales Agreement. During the year ended December 31, 2020, we sold approximately 5.8 million shares of common 
stock under the 2019 Sales Agreement and the 2020 Sales Agreement, as applicable, at an average price of approximately $4.40 per share, raising 
aggregate net proceeds of approximately $24.8 million after deducting an aggregate commission of approximately 3%. During the year ended December 
31, 2021, we did not sell any shares of common stock under the 2020 Sales Agreement or the 2021 Sales Agreement.

As of December 31, 2021, we had cash, cash equivalents and short- and long-term investments totaling $291.2 million and an accumulated deficit of 

$614.4 million.  Based on our current plans and forecasted expenses, we believe that our cash, cash equivalents and investments as of December 31, 2021 
and proceeds, net of facility fees and expenses, of $27.6 million received in February 2022 in connection with the Second Amendment, will enable us to 
fund our operating expenses, debt service obligations and capital expenditures for at least the next 12-months from issuance of our consolidated financial 
statements included elsewhere in this Annual Report on Form 10-K. We have based this estimate on assumptions that may prove to be wrong, and we could 
use our capital resources sooner than we currently expect.  

Collaboration and Manufacturing Agreements

License Agreement with Société des Produits Nestlé S.A. (Nestlé)

In January 2016, we entered into the 2016 License Agreement with Société des Produits Nestlé S.A., or, together with NHSc Pharma Partners, 
Nestlé, for the development and commercialization of certain of our product candidates in development for the treatment and management of CDI and IBD, 
including UC and Crohn’s disease. In exchange for the license, Nestlé agreed to pay us an upfront cash payment of $120.0 million, which we received in 
February 2016. Nestlé has also agreed to pay us tiered royalties, at percentages ranging from the high single digits to high teens, of net sales of certain 
products based on our microbiome technology that are being developed for the treatment of CDI and IBD, including SER-109, SER-262, SER-287 and 
SER-301, or collectively, the 2016 Collaboration Products, in markets outside of the United States and Canada, or the 2016 Licensed Territory. We are 
eligible to receive up to $285.0 million in development milestone payments, $375.0 million in regulatory payments and up to an aggregate of $1.1 billion 
for the achievement of certain commercial milestones related to the sales of 2016 Collaboration Products. The full potential value of the up-front payment 
and milestone payments payable by Nestlé is over $1.9 billion, assuming all products receive regulatory approval and are successfully commercialized. In 
September 2016, we received a $10.0 million milestone payment associated with the initiation of the Phase 1b clinical study for SER-262 in CDI. In June 
2017, we initiated a Phase 3 clinical study of SER-109 (ECOSPOR III) in patients with multiply recurrent CDI. In July 2017, we received $20.0 million 
based on the achievement of this milestone under the 2016 License Agreement. In November 2018, we executed a letter agreement with Nestlé, or the 
Letter Agreement, modifying certain terms of the 2016 License Agreement. Under the Letter Agreement, Nestlé agreed to pay us the $20.0 million Phase 3 
milestone payment upon commencement of the Phase 2b study for SER-287. In December 2018, we received $40.0 million in milestone payments in 
connection with the commencement of the Phase 2b study for SER-287. In August 2020, we received $10.0 million from Nestlé in connection with the 
initiation of the Phase 1b SER-301 study.  To date, we have received $80.0 million in development milestones under the 2016 License Agreement with 
Nestlé.

88

For the development of 2016 Collaboration Products for IBD under a global development plan, we agreed to pay the costs of clinical trials of such 

products up to and including Phase 2 clinical trials, and 67% of the costs for Phase 3 and other clinical trials of such products, with Nestlé bearing the 
remaining 33% of such costs. The Letter Agreement also provides scenarios under which Nestlé’s reimbursement to us for certain Phase 3 development 
costs would be reduced or delayed depending on the outcomes of the SER-287 Phase 2b study. For other clinical development of 2016 Collaboration 
Products for IBD, we agreed to pay the costs of such activities to support approval in the United States and Canada, and Nestlé agreed to bear the cost of 
such activities to support approval of 2016 Collaboration Products in the 2016 Licensed Territory.

With respect to development of 2016 Collaboration Products for CDI under a global development plan, we agreed to pay all costs of Phase 2 clinical 
trials for SER-109 and for Phase 3 clinical trials for SER-109. We agreed to bear all costs of conducting any Phase 1 or Phase 2 clinical trials under a global 
development plan for 2016 Collaboration Products other than SER-109 for CDI. We agreed to pay 67% and Nestlé agreed to pay 33% of other costs of 
Phase 3 clinical trials conducted for 2016 Collaboration Products other than SER-109 for CDI under a global development plan. For other clinical 
development of 2016 Collaboration Products for CDI, we agreed to pay costs of such development activities to support approval in the United States and 
Canada, and Nestlé agreed to bear the cost of such activities to support approval of 2016 Collaboration Products in the 2016 Licensed Territory.

The 2016 License Agreement continues in effect until terminated by either party on the following bases: (i) Nestlé may terminate the 2016 License 

Agreement in the event of serious safety issues related to any of the 2016 Collaboration Products; (ii) we may terminate the 2016 License Agreement if 
Nestlé challenges the validity or enforceability of any of our licensed patents; and (iii) either party may terminate the 2016 License Agreement in the event 
of the other party’s uncured material breach or insolvency. Upon termination of the 2016 License Agreement, all licenses granted to Nestlé by us will 
terminate, and all rights in and to the 2016 Collaboration Products in the 2016 Licensed Territory will revert to us. If we commit a material breach of the 
2016 License Agreement, Nestlé may elect not to terminate the 2016 License Agreement but instead apply specified adjustments to its payment obligations 
and other terms and conditions of the 2016 License Agreement. 

License Agreement with NHSc Pharma Partners (Nestlé)

On July 1, 2021, we entered into a License Agreement, or the 2021 License Agreement, with NHSc Pharma Partners, or, together with Société des 

Produits Nestlé S.A., Nestlé. Pursuant to the 2021 License Agreement, we granted to Nestlé, under certain of our patent rights and know how, a co-
exclusive, sublicensable (under certain circumstances) license to develop, commercialize and conduct medical affairs activities for (i) therapeutic products 
based on our microbiome technology (including our SER-109 product candidate) that are developed by us or on our behalf for the treatment of CDI and 
recurrent CDI, as well as any other indications pursued for the products upon mutual agreement of the parties, or the 2021 Field, in the United States and 
Canada, or the 2021 Licensed Territory, and (ii) our SER-109 product candidate and any improvements and modifications thereto developed pursuant to the 
terms of the 2021 License Agreement, or the 2021 Collaboration Products, for any indications in the 2021 Licensed Territory.

The 2021 License Agreement sets forth the parties’ respective obligations for development, regulatory, commercialization, medical affairs, and 

manufacturing and supply activities for the 2021 Collaboration Products with respect to the 2021 Field and the 2021 Licensed Territory.  Pursuant to the 
2021 License Agreement, we are responsible for, and will use commercially reasonable efforts in, conducting development of SER-109 in the 2021 Field in 
the United States until first regulatory approval for SER-109 is obtained in the 2021 Field in the United States and in accordance with a development and 
regulatory activity plan, at our cost, subject to certain exceptions specified in the 2021 License Agreement.  We are also responsible for all regulatory 
affairs related to 2021 Collaboration Products in the 2021 Field in the 2021 Licensed Territory, at its cost, except that expenses incurred for regulatory 
activities approved by a joint steering committee pursuant to a life cycle management plan for 2021 Collaboration Products are shared equally between the 
parties.  We will be solely responsible for manufacturing and supplying 2021 Collaboration Products for development in the 2021 Field in the 2021 
Licensed Territory.

Nestlé has the sole right to commercialize the 2021 Collaboration Products in the 2021 Licensed Territory in accordance with a commercialization 

plan, subject to our right to elect to provide up to a specified percentage of all promotional details for a certain target audience.  Each party will use 
commercially reasonable efforts to commercialize the 2021 Collaboration Products in the 2021 Licensed Territory in accordance with the 
commercialization plan.  Both parties will perform medical affairs activities for 2021 Collaboration Products in the 2021 Licensed Territory in accordance 
with a medical affairs plan.  We will be solely responsible for the manufacturing and supply of 2021 Collaboration Products for commercialization under a 
supply agreement that will be entered into between the parties.  We will be responsible for commercialization and medical affairs activities costs incurred 
by the parties until first commercial sale of the first 2021 Collaboration Product in the 2021 Licensed Territory and in accordance with a pre-launch plan, 
up to a specified cap.  Following first commercial sale of the first 2021 Collaboration Product, we will be entitled to a royalty in an amount equal to 
approximately 50% of the commercial profits.

In exchange for the grant of the licenses under the 2021 License Agreement, Nestlé agreed to pay us a non-refundable, non-creditable and non-

cancellable upfront payment of $175.0 million, which was received in July 2021. Nestlé also agreed to pay us an additional $125.0 million due upon FDA 
approval of SER-109, $10.0 million upon Canadian regulatory approval of SER-109, and sales target milestones payments totaling up to $225.0 million.

89

The 2021 License Agreement continues in effect until all development and commercialization activities for all 2021 Collaboration Products in the 
2021 Licensed Territory have permanently ceased. The 2021 License Agreement may be terminated by either party upon sixty days’ written notice for the 
other party’s material breach that remains uncured during such sixty-day period, or immediately upon written notice for the other party’s insolvency. Nestlé 
may also terminate the 2021 License Agreement at-will (i) with twelve months’ prior written notice, effective only on or after the third anniversary of first 
commercial sale of the first 2021 Collaboration Product in the 2021 Licensed Territory, (ii) if first commercial sale of the first 2021 Collaboration Product 
in the 2021 Licensed Territory has not occurred by the fifth anniversary of the effective date of the 2021 License Agreement, with one hundred eighty days’ 
prior written notice, which must be provided during a specified period set forth in the 2021 License Agreement, or (iii) if regulatory approval for SER-109 
is not granted after submission by us of a filing seeking first regulatory approval as set forth in the development and regulatory activity plan, and the parties 
fail to agree on further development of SER-109 in accordance with the terms of the 2021 License Agreement, with one hundred eighty days’ prior written 
notice, which must be provided within a specified period set forth in the 2021 License Agreement. We may also terminate the 2021 License Agreement 
immediately upon written notice if Nestlé challenges any licensed patent in the 2021 Licensed Territory.

Upon termination of the 2021 License Agreement, all licenses granted to Nestlé by us will terminate. If we commit a material breach of the 2021 

License Agreement, Nestlé may elect not to terminate the 2021 License Agreement but instead apply specified adjustments to the payment terms and other 
terms and conditions of the 2021 License Agreement. The 2021 License Agreement contains customary representations and warranties by the parties, 
intellectual property provisions including ownership, patent prosecution, enforcement and defense, certain indemnification rights in favor of each party, and 
customary confidentiality provisions and limitations of liability.

Bacthera Long Term Manufacturing Agreement

In November 2021, we entered into a Long Term Manufacturing Agreement, or the Bacthera Agreement with BacThera AG, or Bacthera, a joint 

venture between Chr.  Hansen and a Lonza Group affiliate.  The Bacthera Agreement governs the general terms under which Bacthera, or one of its 
affiliates, will (i) construct a dedicated full-scale production suite for us at Bacthera’s Microbiome Center of Excellence in Visp, Switzerland, which is 
currently under construction; and (ii) provide manufacturing services to us for our SER-109 product and, if agreed by the parties, SER-287 product.

Under the terms of the Bacthera Agreement, we agreed to pay Bacthera a total of at least 240 million CHF (or approximately $262 million) for the 

initial term of the agreement, inclusive of the construction fees and annual operating fees. The construction fees are payable upon the achievement of 
certain milestones related to the construction of the dedicated manufacturing suite.  The annual operating fee includes the cost of a baseline annual batch 
production volume.  We have also agreed to pay certain other ancillary fees and a per-batch fee in excess of the baseline batches.  These fees are subject to 
adjustment during construction for certain items outside of Bacthera’s control and annually against an agreed index.  We will supply the active 
pharmaceutical ingredients to Bacthera to enable it to perform the services and pay for certain other raw materials and manufacturing components, which 
will be acquired by Bacthera.

The Bacthera Agreement has an initial term that continues until the tenth anniversary of the earlier of (a) successful completion of construction and 

demonstration of Bacthera’s readiness for commercial production or (b) the commencement of manufacturing. The initial term is subject to renewals, which 
could extend the term to 16 years, and additional three-year terms thereafter.  Each party has the ability to terminate the Bacthera Agreement upon the 
occurrence of certain customary conditions.  We may also terminate the Bacthera Agreement for convenience after a defined period.  In the event of a 
termination, we have certain financial obligations that would apply, and Bacthera has agreed to grant a license to Bacthera-developed manufacturing know 
how, if any, and provide technical assistance to us, so that we could transfer the manufacturing operations to ourselves or a third party.  The Bacthera 
Agreement also contains representations, warranties and indemnity obligations as well as limitations of liability that are customary for agreements of this 
type.

Agreement with AstraZeneca

In March 2019, we entered into the Research Agreement with MedImmune, a wholly owned subsidiary of AstraZeneca. Pursuant to the Research 
Agreement, we and AstraZeneca agreed to conduct certain pre-clinical and development activities and may conduct certain clinical research with the goal 
of advancing the mechanistic understanding of the microbiome in augmenting the efficacy of cancer immunotherapy, including potential synergy with 
AstraZeneca compounds in accordance with a mutually agreed research plan. Pursuant to the Research Agreement, we agreed not to conduct research or 
development of any microbiome products specifically designed by us during the term of the Research Agreement for the treatment of cancer with or on 
behalf of any third party without the prior approval of the joint steering committee for the Research Agreement until at least three years after the effective 
date of the Research Agreement.

AstraZeneca agreed to bear all costs of conducting its activities under the research plan and to reimburse us for certain costs incurred under the 
research plan. Additionally, AstraZeneca agreed to pay to us a total of $20.0 million in three equal installments, the first of which we received in April 
2019, the second of which we received in December 2019, and the third of which we received in January 2021. Such payments are payable even if the 
Research Agreement is terminated in accordance with its terms, unless the Research Agreement is terminated by AstraZeneca for our uncured material 
breach.  

90

We also granted AstraZeneca an exclusive option to negotiate exclusive license rights to certain of our technologies and assets. If AstraZeneca 
exercises this option, we have agreed to enter into good faith negotiations with them for terms and conditions of such license agreement for a specified time 
period.

In December 2020, we received written notice from AstraZeneca that they elected to terminate the Research Agreement by and in accordance with 

its terms. The termination of the Research Agreement was effective on April 2, 2021. 

Indebtedness

Loan and Security Agreement with Hercules

In October 2019, we entered into a loan and security agreement with Hercules, pursuant to which a term loan in an aggregate principal amount of up 

to $50.0 million, or the Original Credit Facility, was available to us in three tranches, subject to certain terms and conditions. We received the first tranche 
of $25.0 million upon signing the agreement on October 29, 2019. We did not meet the milestone requirements for the second tranche under the Original 
Credit Facility, and as such, the additional second tranche amount of up to $12.5 million is not available for us to borrow.  We elected not to borrow the 
third tranche of $12.5 million, which was available upon Hercules’ approval until June 30, 2021. Commitments of Hercules to lend to us under the Original 
Credit Facility are subject to amendments made pursuant to the Second Amendment, as defined below. See “Amendment to Loan and Security Agreement 
with Hercules” below.

Advances under the Original Credit Facility bore interest at a rate equal to the greater of either (i) the Prime Rate (as reported in The Wall Street 

Journal) plus 4.40%, and (ii) 9.65%.  Following an interest-only period of 24 months, principal payments were due in 24 equal monthly installments 
commencing December 1, 2021 and ending November 1, 2023. We paid Hercules a commitment fee of $0.4 million at the closing. The interest rate, 
interest-only period and prepayments under the Original Credit Facility are subject to amendments made pursuant to the Second Amendment. See 
“Amendment to Loan and Security Agreement with Hercules” below.

The Original Credit Facility is secured by substantially all of our assets, other than our intellectual property.  We have agreed to not pledge or secure 

our intellectual property to others.

The Original Credit Facility includes affirmative and negative covenants applicable to us.  The affirmative covenants include, among others, 
covenants requiring us to maintain our legal existence and governmental approvals, deliver certain financial reports and maintain insurance coverage.  The 
negative covenants include, among others, restrictions on our transferring collateral, making changes to the nature of our business, incurring additional 
indebtedness, engaging in mergers or acquisitions, paying dividends or making other distributions, making investments, engaging in transactions with 
affiliates, creating liens and selling assets, in each case subject to certain exceptions, including, among others, the ability for us to issue up to $150.0 
million in convertible notes and entering into exclusive outbound licenses for our intellectual property. Certain covenants under the Original Credit Facility 
were amended by the Second Amendment. See “Amendment to Loan and Security Agreement with Hercules” below.

The Original Credit Facility also includes events of default, the occurrence and continuance of which provide Hercules with the right to demand 
immediate repayment of all principal and unpaid interest, and to exercise remedies against us and the collateral.  These events of default include, among 
other things and subject to customary exceptions: (i) insolvency, liquidation, bankruptcy or similar events; (ii) failure to pay any debts due under the loan 
and security agreement with Hercules or other loan documents on a timely basis; (iii) failure to observe certain covenants under the loan and security 
agreement with Hercules; (v) occurrence of a material adverse effect; (vi) material misrepresentation by us; (vii) occurrence of any default under any other 
agreement involving material indebtedness; and (viii) certain material money judgments.

On April 16, 2020, we entered into an amendment to the loan and security agreement with Hercules (the “First Amendment”), permitting us to enter 

into a promissory note under the Paycheck Protection Program of the Coronavirus Aid, Relief and Economic Stability Act. On April 17, 2020 we issued a 
Promissory Note to Bank of America, NA, pursuant to which we received loan proceeds of $2.9 million (the “Loan”), however, based on updated guidance 
related to this program, we decided to repay the full amount of the Loan, and repaid the Loan on May 4, 2020.

As of December 31, 2021 and December 31, 2020, the outstanding principal under the Original Credit Facility was $24.1 million and $25.0 million, 
respectively.  For a further description of the Original Credit Facility, see Note 9 to our consolidated financial statements included elsewhere in this Annual 
Report on Form 10-K. 

Amendment to Loan and Security Agreement with Hercules

Effective as of February 24, 2022 (the “Effective Date”), we entered into a Second Amendment to the Original Credit Facility (as amended by the 

First Amendment) pursuant to which term loans in an aggregate principal amount of up to $100.0 million (the “New Credit Facility”) have become 
available to us in five tranches including the first tranche under the Original Credit Facility, subject to certain terms and conditions.

The first tranche in an aggregate principal amount of $25.0 million is outstanding as of the Effective Date, after taking into account reborrowing by 

us on the Effective Date of a previously-repaid principal amount of approximately $2.9 million. The second tranche in an aggregate principal amount of 
$12.5 million and the third tranche in an aggregate principal amount of $12.5 million have 

91

been advanced to us and are outstanding as of the Effective Date. The fourth tranche in an aggregate principal amount of $25.0 million is available upon 
satisfaction of certain conditions, including the approval by the U.S. Food and Drug Administration of a biologics license application in respect of SER-109 
(the “Regulatory Approval Milestone”) by no later than December 15, 2023. The fifth tranche in an aggregate principal amount of up to $25.0 million is 
available through the Amortization Date (as defined below) upon satisfaction of certain conditions, including the Lenders’ investment committee approval. 

All advances outstanding under the New Credit Facility will bear interest at a rate equal to the greater of either (i) the Prime Rate (as reported in The 
Wall Street Journal) plus 6.40%, and (ii) 9.65%.  For all advances outstanding under the New Credit Facility, we will make interest only payments through 
December 31, 2023, extendable to December 31, 2024 upon satisfaction of certain conditions (such applicable date, the “Amortization Date”). The 
principal balance and interest of the advances will be repaid in equal monthly installments after the Amortization Date and continuing through October 1, 
2024, extendable to October 1, 2025, upon satisfaction of certain conditions (such applicable date, the “Maturity Date”). 

We may prepay advances under the New Credit Facility, in whole or in part, at any time subject to a prepayment charge equal to: (a) 2.0% of 
amounts so prepaid, if such prepayment occurs during the first year following the Effective Date; (b) 1.5% of the amount so prepaid, if such prepayment 
occurs during the second year following the Effective Date, and (c) 1.0% of the amount so prepaid, if such prepayment occurs during the third year 
following the Effective Date. 

We will pay an end of term charge of 4.85% of the aggregate amount of the advances made under the Old Credit Facility on the earliest date of (i) 
November 1, 2023; (ii) the date that we prepay all of the outstanding principal in full, or (iii) the date the loan payments are accelerated due to an event of 
default. We will pay an additional end of term charge of 1.75% of the aggregate amount of the advances under the New Credit Facility (including the first 
tranche of $25.0 million) on the earliest date of (i) the Maturity Date; (ii) the date that we prepay all of the outstanding principal in full, or (iii) the date the 
loan payments are accelerated due to an event of default.

Other terms of the New Credit Facility remain generally identical to those under the Old Credit Facility, with certain covenants amended by the 

Second Amendment to provide us with additional operational flexibility, including the ability for us to issue up to $350.0 million in convertible notes. The 
New Credit Facility includes a conditional liquidity covenant commencing on June 15, 2023, which ceases to apply if certain conditions including the 
Regulatory Approval Milestone are satisfied. 

Cash Flows

The following table summarizes our sources and uses of cash, cash equivalents and restricted cash for the years ended December 31, 2021 and 2020. 

Cash provided by (used in) operating activities
Cash provided by (used in) investing activities
Cash provided by financing activities
Net increase in cash, cash equivalents and restricted cash

Operating Activities

Year Ended December 31,

2021

2020

(in thousands)
6,688     $
64,088     $
1,178     $
71,954    $

(93,610 )
(158,891 )
303,424  
50,923  

  $
  $
  $
  $

During the year ended December 31, 2021, net cash provided by operating activities was $6.7 million, primarily due to changes in our operating 
assets and liabilities of $41.5 million and non-cash charges of $30.7 million, partially offset by a net loss of $65.6 million. Non-cash charges consisted 
primarily of $20.2 million of stock-based compensation expense, $3.3 million related to the amortization of right-of-use assets, $5.9 million of 
depreciation, and $2.5 million of net amortization of premiums related to our investments, partially offset by collaboration profit sharing of $1.7 million 
related to the license and collaboration agreement with Nestlé. Changes in our operating assets and liabilities during the year ended December 31, 2021 
primarily consisted of a $43.0 million increase in accrued expenses and other liabilities, a $9.4 million increase in accounts payable and a $9.4 million 
decrease in accounts receivable, partially offset by a $12.3 million increase in prepaid expenses and other current and non-current assets, a $4.4 million 
decrease in deferred revenue and a $3.6 million decrease in operating lease liabilities. The increase in accrued expenses and other current and long-term 
liabilities was primarily due to the liability established for pre-launch activities in conjunction with the 2021 License Agreement with Nestlé. The decrease 
in deferred revenue is due to recognition of revenue during the year, partially offset by an increase of $8.2 million, which represents the portion of the 
transaction price for the 2021 License Agreement allocated to the research and development services. The decrease in operating lease liabilities was due to 
the cash payment of lease obligations. 

During the year ended December 31, 2020, operating activities used $93.6 million of cash, primarily due to a net loss of $89.1 million and by cash 

used in changes in our operating assets and liabilities of $23.2 million and partially offset by non-cash charges of $18.7 million. Net cash used in changes in 
our operating assets and liabilities during the year ended December 31, 2020 primarily consisted of a $11.6 million decrease in deferred revenue, a $4.5 
million decrease in operating lease liabilities, a $1.2 million decrease in accounts payable, a $7.6 million increase in accounts receivable, a $2.2 million 
increase in prepaid expenses and other current 

92

 
 
 
 
 
 
   
 
 
 
 
 
assets, and offset by a $3.8 million decrease in accrued expenses and other liabilities. The decrease in deferred revenue is due to recognition of revenue 
during the year and partially offset by $10.0 million associated with the increase in the transaction price for the 2016 License Agreement for the initiation 
of the Phase 1b study for SER-301. The decrease in operating lease liabilities was due to the cash payment of lease obligations.

Investing Activities

During the year ended December 31, 2021, net cash provided by investing activities was $64.1 million, primarily due to maturities of investments of 

$169.6 million, partially offset by purchases of investments of $96.0 million and purchases of property and equipment of $9.6 million. 

During the year ended December 31, 2020, investing activities used $158.9 million of cash, consisting of purchases of investments of $218.3 
million, and purchases of property and equipment of $0.6 million; these amounts were partially offset by sales and maturities of investments of $60.0 
million.

Financing Activities

During the year ended December 31, 2021, net cash provided by financing activities was $1.2 million.  This was a result of $1.3 million from the 

exercise of stock options and $0.8 million from the issuance of common stock under the ESPP plan, partially offset by $0.9 million of principal payments 
relating to our term loan.    

During the year ended December 31, 2020, net cash provided by financing activities was $303.4 million.  This was a result of $243.7 million from 

proceeds from public offering of common stock, net of costs, $19.9 million of proceeds from the Securities Purchase Agreement, $24.8 million of proceeds 
from the at market equity offering, net of commissions, and $14.4 million from the exercise of stock options.  

Funding Requirements

Our expenses may increase substantially in connection with our ongoing and planned activities related to our pipeline products, which are in clinical 

development, and our follow-on therapeutic candidates and other programs. In addition, we expect to continue to incur additional costs associated with 
operating as a public company. We anticipate that our expenses will increase substantially if and as we:

•

•

•

•

•

•

•

•

•

•

•

complete the clinical development and prepare for commercialization of SER-109 for patients with recurrent CDI;

re-evaluate the clinical development of SER-287 for the treatment of UC in light of the Phase 2b clinical study results and in conjunction 
with the additional microbiome biomarker data; 

continue the clinical development of SER-301 for the treatment of UC;

conduct research and initiate clinical development of SER-155 for the prevention of mortality due to GvHD in patients receiving allo-HSCT;

make strategic investments in manufacturing capabilities;

make strategic investments in our research discovery and development platforms and capabilities; 

maintain and augment our intellectual property portfolio and opportunistically acquire complementary intellectual property;

potentially establish a sales and distribution infrastructure and scale-up manufacturing capabilities to commercialize any products for which 
we may obtain regulatory approval;

perform our obligations under our agreements with our collaborators;

seek to obtain regulatory approvals for our product candidates; and

experience any delays or encounter any issues with any of the above, including but not limited to failed studies, complex results, safety issues 
or other regulatory challenges.

Because of the numerous risks and uncertainties associated with the development of our programs, we are unable to estimate the amounts of 
increased capital outlays and operating expenses associated with completing the research and development of our product candidates. Our future capital 
requirements will depend on many factors, including:

•

•

•

•

the impact of the COVID-19 pandemic; 

the progress and results of our clinical studies and pre-clinical development;

the cost of manufacturing clinical supplies of our product candidates;

the costs, timing and outcome of regulatory review of our product candidates and research activities;

93

•

•

•

•

•

the costs and timing of future commercialization activities, including manufacturing, marketing, sales and distribution, for any of our product 
candidates for which we receive marketing approval;

the revenue, if any, received from commercial sales of our product candidates for which we receive marketing approval;

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

the effect of competing technological and market developments; and

the extent to which we acquire or invest in businesses, products and technologies, including entering into licensing or collaboration 
arrangements for product candidates.

Identifying potential product candidates and conducting preclinical testing and clinical trials is a time-consuming, expensive and uncertain process 
that takes years to complete, and we may never generate the necessary data or results required to obtain marketing approval and achieve product sales. In 
addition, our product candidates, if approved, may not achieve commercial success. Our commercial revenues, if any, will be derived from sales of 
products that we do not expect to be commercially available for many years, if ever. Accordingly, we will need to obtain substantial additional funds to 
achieve our business objectives.

Adequate additional funds may not be available to us on acceptable terms, or at all. Additionally, market volatility resulting from the COVID-19 

pandemic or other factors could also adversely impact our ability to access capital as and when needed.  To the extent that we raise additional capital 
through the sale of equity or convertible debt securities, our shareholders’ ownership interest will be diluted, and the terms of these securities may include 
liquidation or other preferences that adversely affect our shareholders’ rights as common stockholders. Our loan and security agreement with Hercules 
currently includes, and any additional debt financing and preferred equity financing, if available, may involve agreements that include, covenants limiting 
or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. Additional debt or 
preferred equity financing may also require the issuance of warrants, which could potentially dilute our shareholders’ ownership interest.

If we raise additional funds through collaborations, strategic alliances or licensing arrangements with third parties, in addition to our existing 
collaboration agreements, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs, or product candidates 
or grant licenses on terms that may not be favorable to us. If we are unable to raise additional funds through equity or debt financings when needed, we 
may be required to delay, limit, reduce or terminate our product development programs or any future commercialization efforts or grant rights to develop 
and market product candidates that we would otherwise prefer to develop and market ourselves.

As noted above, the magnitude and duration of the COVID-19 pandemic and its impact on our liquidity and future funding requirements is uncertain 

as of the filing date of this Annual Report on Form 10-K as this continues to evolve globally. See “Impact of the COVID-19 Pandemic” above and “Risk 
Factors—Risks Related to Our Operations—The COVID-19 pandemic has adversely impacted and could continue to adversely impact, our business, 
including our preclinical studies and clinical trials, results of operations and financial condition” in Part I, Item 1A of this Annual Report on Form 10-K for 
a further discussion of the possible impact of the COVID-19 pandemic on our business.

As discussed in Note 1 of the consolidated financial statements included elsewhere in this Annual Report on Form 10-K we have the responsibility 

to evaluate whether conditions or events raise substantial doubt about our ability to meet our future financial obligations as they become due within one 
year after the date the financial statements are issued.  We expect our cash, cash equivalents and short- and long-term investments at December 31, 2021 of 
$291.2 million, and proceeds, net of facility fees and expenses, of $27.6 million received in February 2022 in connection with the Second Amendment, will 
be sufficient to fund our operating expenses, debt service obligations and capital expenditure requirements for at least the next 12-months from issuance of 
the financial statements. 

The following table summarizes our contractual obligations at December 31, 2021 and the effect such obligations are expected to have on our 

liquidity and cash flows in future periods:

Contractual Obligations and Commitments

(1)

Operating lease commitments
Long-term debt obligation, including interest and end of
   term charge
Long-term manufacturing agreement
Total

(2)

(3)

Total

Less Than
1 Year

Payments Due by Period

2 - 3 Years
(in thousands)

4 - 5 Years

More Than
5 Years

  $

31,741     $

8,512     $

9,872     $

4,965    $

8,392  

27,689      
255,727      
315,157     $

—      
7,648      
16,160     $

27,689      
87,260      
124,821     $

—     
40,205     
45,170     $

—  
120,614  
129,006  

  $

94

 
 
 
 
 
 
   
   
   
   
 
 
 
 
   
   
 
(1)

(2)

Amounts in the table reflect payments due under our operating lease agreements that expire between May 2021 and December 2031. 

Amounts in the table reflect payments due for our term loan under an arrangement with Hercules for $25,000. The amounts in the table above reflect 
interest-only payments through December 1, 2021 with payments on principal beginning thereafter. For purposes of the table above, interest 
payments were calculated using an annual interest rate of 9.65%, which was the interest rate in effect as of December 31, 2021. Additionally, the 
table above includes a payment due upon maturity of the loan of $1,213. See Note 9 and Note 18 of the consolidated financial statements for further 
discussion of the Hercules term loan.  

(3)

Amounts in the table reflect fixed amounts due under our long-term manufacturing agreement with Bacthera, inclusive of construction fees and 
annual operating fees.

We enter into contracts in the normal course of business with CROs for clinical trials, preclinical research studies and testing, manufacturing and other 
services and products for operating purposes. These contracts generally provide for termination upon notice, and therefore we believe that our non-
cancelable obligations under these agreements are not material.

For a discussion of recent accounting standards see Note 2, Summary of Significant Accounting Policies, to our consolidated financial statements 

Recently Issued and Adopted Accounting Pronouncements

included in this report.

Item 7A. Quantitative and Qualitative Disclosures about Market Risk

We are exposed to market risk related to changes in interest rates. 

Interest Rate Fluctuation Risk

As of December 31, 2021, our cash and cash equivalents consisted of cash and money market accounts. Our interest income is sensitive to changes 

in the general level of U.S. interest rates. However, because of the short-term nature of the instruments in our portfolio, an immediate 10% change in 
market interest rates would not have a material impact on the fair market value of our investment portfolio or on our financial position or results of 
operations.

As of December 31, 2021, we had outstanding borrowings under the Original Credit Facility.  We accrue interest at a rate equal to the greater of 
either (i) the Prime Rate (as reported in The Wall Street Journal) plus 4.40%, and (ii) 9.65%. An immediate 10% change in the Prime Rate would not have a 
material impact on our debt‑related obligations, financial position or results of operations

Item 8. Financial Statements and Supplementary Data

The financial statements required to be filed pursuant to this Item 8 are appended to this report. An index of those financial statements is found in 

Item 15.

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

Item 9A. Controls and Procedures

Limitations on Effectiveness of Controls and Procedures

In designing and evaluating our disclosure controls and procedures, management recognizes that any controls and procedures, no matter how well 

designed and operated, can provide only reasonable assurance of achieving the desired control objectives. In addition, the design of disclosure controls and 
procedures must reflect the fact that there are resource constraints and that management is required to apply judgment in evaluating the benefits of possible 
controls and procedures relative to their costs.

Evaluation of Disclosure Controls and Procedures

Our management, with the participation of our principal executive officer and principal financial officer, has evaluated the effectiveness of 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), as of the end of 
the period covered by this Annual Report on Form 10-K. Based on such evaluation, our principal executive officer and principal financial officer has 
concluded that as of December 31, 2021, our disclosure controls and procedures were effective at the reasonable assurance level.

Our management is responsible for establishing and maintaining adequate internal control over our financial reporting, as such term is defined in 

Rule 13a-15(f) and 15d-15(f) under the Securities Exchange Act of 1934, as amended.

Management’s Annual Report on Internal Control Over Financial Reporting

95

 
Our management conducted an assessment of the effectiveness of our internal control over financial reporting based on the criteria set forth in 

“Internal Control – Integrated Framework (2013)” issued by the Committee of Sponsoring Organizations of the Treadway Commission.

Based on this assessment, our management concluded that, as of December 31, 2021, our internal control over financial reporting was effective.

The effectiveness of our internal control over financial reporting as of December 31, 2021, has been audited by PricewaterhouseCoopers LLP, an 

independent registered public accounting firm, as stated in their report included in this Annual Report on Form 10-K on page F-1. 

There were no changes in our internal control over financial reporting during our most recent fiscal quarter that have materially affected, or are 

reasonably likely to materially affect, our internal control over financial reporting.

Changes in Internal Control Over Financial Reporting

Item 9B. Other Information

Effective as of February 24, 2022 (the “Effective Date”), we entered into a Second Amendment to Loan and Security Agreement (the “Second 
Amendment”), with the lenders party thereto (the “Lenders”), and Hercules Capital, Inc., in its capacity as the administrative agent and the collateral agent 
for the Lenders, which amended a loan and security agreement dated October 29, 2019 (as amended from time to time prior to the Effective Date, the 
“Original Credit Facility”). Under the Original Credit Facility, term loans in an aggregate principal amount of up to $50.0 million were available to us, of 
which $25.0 million (the “first tranche”) has been advanced to us and approximately $22.1 million were outstanding immediately prior to the Effective 
Date. Pursuant to the Second Amendment, term loans in an aggregate principal amount of up to $100.0 million (the “New Credit Facility”) have become 
available to us in five tranches including the first tranche, subject to certain terms and conditions.

The first tranche in an aggregate principal amount of $25.0 million is outstanding as of the Effective Date, after taking into account reborrowing by 

us on the Effective Date of a previously-repaid principal amount of approximately $2.9 million. The second tranche in an aggregate principal amount of 
$12.5 million and the third tranche in an aggregate principal amount of $12.5 million have been advanced to us and are outstanding as of the Effective 
Date. The fourth tranche in an aggregate principal amount of $25.0 million is available upon satisfaction of certain conditions, including the approval by 
the U.S. Food and Drug Administration of a biologics license application in respect of SER-109 (the “Regulatory Approval Milestone”) by no later than 
December 15, 2023. The fifth tranche in an aggregate principal amount of up to $25.0 million is available through the Amortization Date (as defined 
below) upon satisfaction of certain conditions, including the Lenders’ investment committee approval. 

All advances outstanding under the New Credit Facility will bear interest at a rate equal to the greater of either (i) the Prime Rate (as reported in The 

Wall Street Journal) plus 6.40%, and (ii) 9.65%. For all advances outstanding under the New Credit Facility, we will make interest only payments through 
December 31, 2023, extendable to December 31, 2024 upon satisfaction of certain conditions (such applicable date, the “Amortization Date”). The 
principal balance and interest of the advances will be repaid in equal monthly installments after the Amortization Date and continuing through October 1, 
2024, extendable to October 1, 2025, upon satisfaction of certain conditions (such applicable date, the “Maturity Date”). 

We may prepay advances under the New Credit Facility, in whole or in part, at any time subject to a prepayment charge equal to: (a) 2.0% of 
amounts so prepaid, if such prepayment occurs during the first year following the Effective Date; (b) 1.5% of the amount so prepaid, if such prepayment 
occurs during the second year following the Effective Date, and (c) 1.0% of the amount so prepaid, if such prepayment occurs during the third year 
following the Effective Date. 

We will pay an end of term charge of 4.85% of the aggregate amount of the advances made under the Old Credit Facility on the earliest date of (i) 
November 1, 2023; (ii) the date that we prepay all of the outstanding principal in full, or (iii) the date the loan payments are accelerated due to an event of 
default. We will pay an additional end of term charge of 1.75% of the aggregate amount of the advances under the New Credit Facility (including the first 
tranche of $25.0 million) on the earliest date of (i) the Maturity Date; (ii) the date that we prepay all of the outstanding principal in full, or (iii) the date the 
loan payments are accelerated due to an event of default.

Other terms of the New Credit Facility remain generally identical to those under the Old Credit Facility, with certain covenants amended by the 

Second Amendment to provide us with additional operational flexibility, including the ability for us to issue up to $350.0 million in convertible notes. The 
New Credit Facility includes a conditional liquidity covenant commencing on June 15, 2023, which ceases to apply if certain conditions including the 
Regulatory Approval Milestone are satisfied.

The foregoing description of the Second Amendment does not purport to be complete and is qualified in its entirety by reference to the full text of 

the Second Amendment, a copy of which is filed as Exhibit 10.19 to this Annual Report on Form 10-K and is incorporated herein by reference.

Item 9C. Disclosure Regarding Jurisdictions That Prevent Inspections

Not applicable.

96

Item 10. Directors, Executive Officers and Corporate Governance

Name

Age

   Position

Director Biographical Information

PART III

Dennis A. Ausiello, M.D. (3)

Grégory Behar (3)

Stephen Berenson (3)
Paul R. Biondi (2)

Willard H. Dere, M.D. (1)

Kurt C. Graves (2)

Richard N. Kender (1)(2)

Eric D. Shaff

Meryl S. Zausner (1)(2)

76

52

61
52

68

54

66

46

65

  Director

  Director

  Chairman of the Board of Directors
  Director

  Director

  Director

  Director

  President, Chief Executive Officer and Director

  Director

(1)

(2)

(3)

Member of the audit committee.

Member of the compensation and talent committee.

Member of the nominating and corporate governance committee.

Dennis A. Ausiello, M.D. has served as a member of our board of directors since April 2015. Dr. Ausiello has served as the Jackson Distinguished Professor 
of Clinical Medicine at Harvard Medical School and Director, Emeritus of Harvard Medical School’s M.D./Ph.D. Program since 1996, Chair of Medicine, 
Emeritus, and Director of the Center for Assessment Technology and Continuous Health (CATCH) at Massachusetts General Hospital, which he co-
founded, since 2012, and Physician-in-Chief Emeritus at Massachusetts General Hospital since 2013. From 1996 to April 2013, Dr. Ausiello served as the 
Chief of Medicine at Massachusetts General Hospital. Dr. Ausiello is a member of the Institute of Medicine of the National Academy of Sciences and a 
fellow of the American Academy of Arts and Sciences. Dr. Ausiello has served on the board of directors of Alnylam Pharmaceuticals since April 2012 and 
previously served on the board of directors of Pfizer Inc. from 2006 to 2020, where he currently serves on the advisory board since 2019. Dr. Ausiello also 
serves on the boards of directors of numerous privately held companies. Dr. Ausiello received a B.A. in Biochemistry from Harvard College and an M.D. 
from the University of Pennsylvania. We believe that Dr. Ausiello is qualified to serve on our board of directors because of his extensive experience as a 
physician and as a director of pharmaceutical companies.

Grégory Behar has served as a member of our board of directors since December 2014. Mr. Behar has served as Chief Executive Officer of Nestlé Health 
Science, a business unit of Société des Produits Nestlé S.A., a health sciences company, since July 2014. From August 2011 to May 2014, Mr. Behar was 
President and Chief Executive Officer of Boehringer Ingelheim Pharmaceuticals Inc. (USA), a pharmaceutical company. From 2010 to July 2011, Mr. 
Behar was Corporate Vice President Region NECAR (North European Union, Canada and Australasia) for Boehringer-Ingelheim GmbH, a pharmaceutical 
company. Mr. Behar has served on the boards of directors of Nestlé Health Science since July 2014, Axcella Health, Inc. since February 2016 and Sonova 
AG since April 2021 and previously served on the board of directors of Aimmune Therapeutics, Inc. from November 2016 until its acquisition in October 
2020. Mr. Behar received his B.S. in Mechanical Engineering from the University of California, Los Angeles, an M.S. in Mechanical Engineering and 
Manufacturing from EPFL in Switzerland and an M.B.A. from INSEAD in France. We believe that Mr. Behar is qualified to serve on our board of directors 
because of his extensive business experience in the health sciences and pharmaceutical industries.

Stephen Berenson has served as Chairman of our board of directors since December 2019 and as a member of our board of directors since August 2019. 
Mr. Berenson has been a Managing Partner at Flagship Pioneering, a life sciences innovation firm which conceives, creates, resources and develops first-in-
category life sciences companies, since June 2017. Prior to Flagship, Mr. Berenson spent 33 years in various roles as an investment banker at J.P. Morgan, 
most recently serving in the role of Vice Chairman of Investment Banking from 2005 to April 2017, where he focused on providing high-touch strategic 
advice and complex transaction execution to leading companies across all industries globally. He was co-founder of J.P. Morgan’s Global Strategic 
Advisory Council and co-founder of the firm’s Board Initiative. Mr. Berenson has served as chairman of the board of directors of Cellarity since July 2021, 
and has served on the boards of directors of Moderna, Inc. since October 2017 and Repertoire Immune Medicines, a privately held company, since May 
2021. Mr. Berenson received an S.B. in Mathematics from the Massachusetts Institute of Technology. We believe that Mr. Berenson is qualified to serve on 
our board of directors because of his extensive experience working with rapidly-growing companies across various industries.

Paul R. Biondi has served as a member of our board of directors since March 2020. Mr. Biondi is an Executive Partner and President of Pioneering 
Medicines at Flagship Pioneering, roles he has held since November 2019. Mr. Biondi joined Flagship Pioneering following a seventeen-year tenure at 
Bristol-Myers Squibb, or BMS, a pharmaceutical company, where he was most recently the 

97

 
  
  
 
  
 
  
 
 
  
 
  
 
  
 
  
 
  
 
Senior Vice President of Strategy and Business Development from October 2015 to November 2019. Prior to serving in the role of Senior Vice President of 
Strategy, from 2002 to 2015, Mr. Biondi held a series of other leadership roles within BMS’ Research and Development organization overseeing strategy, 
portfolio and project management, as well as clinical and business operations. Mr. Biondi holds a bachelor’s degree from Dartmouth College and an 
M.B.A. from the J.L. Kellogg School of Management at Northwestern University. We believe that Mr. Biondi is qualified to serve on our board of directors 
because of his extensive experience in biopharmaceutical strategy and corporate development.

Willard H. Dere, M.D. has served as a member our board of directors since July 2017. Dr. Dere has been Professor of Internal Medicine, B. Lue and Hope 
S. Bettilyon Presidential Endowed Chair in Internal Medicine for Diabetes Research, and Co-Director of the Clinical and Translational Science Institute at 
the University of Utah Health Sciences Center since November 2014 and Associate Vice President for Research since September 2019. Prior to his 
professorship, from 2003 until his retirement in October 2014, Dr. Dere held multiple roles at Amgen, Inc., including Head of Global Development, and 
both corporate and international Chief Medical Officer, and led development of programs in various therapeutic areas. Dr. Dere serves on the boards of 
directors of several companies, including BioMarin Pharmaceutical, Inc. since July 2016, Radius Health since November 2014, and Mersana Therapeutics, 
Inc. since March 2018. He also serves on the boards of directors of privately held companies. From October 2016 to December 2017, he served on the 
board of directors of Ocera Therapeutics. Dr. Dere received his B.A. in History and Zoology and M.D. from the University of California, Davis, completed 
his internal medicine residency training at the University of Utah, and his postdoctoral training in endocrinology and metabolism at the University of 
California, San Francisco. We believe Dr. Dere is qualified to serve on our board of directors due to his extensive academic experience and his knowledge 
of the biotechnology industry.

Kurt C. Graves has served as a member of our board of directors since November 2015. Mr. Graves has served as the Executive Chairman of i20 
Therapeutics, Inc., a biotechnology company, since August 2021. Mr. Graves was previously the Chairman, President and Chief Executive Officer of 
Intarcia Therapeutics, Inc., a biotechnology company, from September 2010 to December 2020 and on its board of directors from August 2010 to 
December 2020. Previously, he served as Executive Vice President, Chief Commercial Officer and Head of Strategic Development at Vertex 
Pharmaceuticals Inc., or Vertex, from July 2007 to October 2009. Prior to joining Vertex, Mr. Graves held various leadership positions at Novartis 
Pharmaceuticals Corporation, or Novartis Corp., from 1999 to June 2007, including the Global General Medicines Business Unit Head and Chief 
Marketing Officer for the pharmaceuticals division of Novartis Corp. from September 2003 to June 2007. He served on the boards directors of Radius 
Health, Inc. from May 2011 to March 2020, and Achillion Pharmaceuticals, Inc. from June 2012 to January 2020. Mr. Graves received a B.S. in Biology 
from Hillsdale College. We believe Mr. Graves is qualified to serve as a member of our board of directors because of his extensive experience in the life 
sciences industry, membership on various boards of directors and his leadership and management experience.

Richard N. Kender has served as a member of our board of directors since October 2014. From October 1978 to September 2013, Mr. Kender held 
positions in a variety of corporate areas at Merck & Co., Inc., or Merck, a pharmaceutical company, most recently serving as Senior Vice President of 
Business Development and Corporate Licensing. Mr. Kender has served on the boards of directors of Poxel S.A. since March 2015, Bicycle Therapeutics 
PLC since July 2019, and ReViral Ltd, a privately held company, since November 2019. He previously served on the boards of directors of INC Research 
Holdings, Inc. between December 2014 and August 2017 and Abide Therapeutics, Inc., a privately held company, between December 2015 and May 2019. 
Mr. Kender received a B.S. in Accounting from Villanova University and an M.B.A. from Fairleigh Dickinson University. We believe Mr. Kender is 
qualified to serve on our board of directors because of his finance experience and knowledge of the biotechnology industry.

Eric D. Shaff has served as our President and Chief Executive Officer and a member of our board of directors since January 2019. Previously, he served as 
our Chief Operating and Financial Officer and Executive Vice President from January 2018 until January 2019 and as our Chief Financial Officer from 
November 2014 until January 2019. From January 2012 to November 2014, Mr. Shaff was Vice President of Corporate Finance for Momenta 
Pharmaceuticals, or Momenta, a biotechnology company, where he helped manage Momenta’s accounting, finance, planning, and procurement functions, 
as well as contributing to Momenta’s investor relations efforts. Prior to Momenta, Mr. Shaff held a number of corporate development and finance positions 
with Genzyme Corporation, a biotechnology company, most recently as Vice President of Finance/Controller for the Personalized Genetic Health division. 
Mr. Shaff has served on the board of directors of Sigilon Therapeutics, Inc. since November 2017. Mr. Shaff received his B.A. from the University of 
Pennsylvania and his M.B.A. from Cornell University. We believe Mr. Shaff is qualified to serve on our board of directors because of his extensive 
business and finance experience and his knowledge of the biotechnology industry.

Meryl Zausner has served as a member of our board of directors since August 2018. Ms. Zausner worked for Novartis Pharmaceuticals, Inc., or Novartis, a 
pharmaceutical company, from 1988 until her retirement in 2017, most recently serving as Chief Financial and Administrative Officer and a member of the 
Pharmaceutical Executive Committee and Global Finance Leadership Team of Novartis in the United States. At Novartis, she helped launch the Oncology 
Business Unit, as well as the company’s shared services organization. Prior to serving as Chief Financial and Administrative Officer, Ms. Zausner was a 
member of the Novartis Global Oncology leadership team, where she contributed to the development and commercialization of therapies, including 
Gleevec® (imatinib). Ms. Zausner has served on the board of directors of Goldfinch Bio, Inc., a privately held company, since February 2021, and she 
previously served on the boards of directors of the Multiple Myeloma Research Foundation from September 2009 to June 2021 and Neon Therapeutics, 
Inc. from December 2017 to May 2020. Ms. Zausner received a B.S. in Accounting and Economics from the University at Albany, SUNY. We believe Ms. 
Zausner is qualified to serve on our board of directors because of her finance and leadership experience and knowledge of the pharmaceutical industry.

98

Name

Eric D. Shaff

David Arkowitz
Paula Cloghessy

Thomas J. DesRosier
David S. Ege, Ph.D.

Matthew Henn, Ph.D.
Lisa von Moltke, M.D.
Teresa L. Young, Ph.D.

Information about our Executive Officers

Age

  Position

46

60
50

67
47

47
63
55

  President, Chief Executive Officer and Director
Executive Vice President, Chief Financial Officer and Head of Business 
Development

  Executive Vice President and Chief People Officer

  Executive Vice President and Chief Legal Officer
  Executive Vice President and Chief Technology Officer

  Executive Vice President and Chief Scientific Officer
  Executive Vice President and Chief Medical Officer
  Executive Vice President, Chief Commercial and Strategy Officer

Information concerning Eric D. Shaff, our President and Chief Executive Officer, may be found above in the section entitled “Director Biographical 
Information.”

David Arkowitz has served as our Executive Vice President, Chief Financial Officer and Head of Business Development since June 2021. Previously, he 
served as the Chief Financial Officer of Flexion Therapeutics, Inc., a biotechnology company that was acquired by Pacira Biosciences, from May 2018 to 
May 2021. From September 2013 to May 2018, Mr. Arkowitz served as Chief Operating Officer and Chief Financial Officer at Visterra, Inc., a 
biotechnology company that was acquired by Otsuka Pharmaceutical Co. He also previously served as Chief Financial Officer at each of Mascoma 
Corporation, AMAG Pharmaceuticals Inc., and Idenix Pharmaceuticals LLC and held additional leadership positions within each company. Preceding his 
tenure at Idenix, Mr. Arkowitz spent more than 13 years at Merck & Co., Inc. where he held roles of increasing responsibility, including Vice President and 
Controller of the U.S. operations, Controller of the global research and development division, and the Chief Financial Officer of Merck’s Canadian 
subsidiary. Mr. Arkowitz has served on the boards of directors of F-star Therapeutics, Inc. since November 2020 and Yumanity Therapeutics, Inc. since 
December 2020 and previously served on the boards of directors of Spring Bank Pharmaceuticals, Inc. from January 2014 to November 2020 and 
Proteostasis Therapeutics, Inc. from March 2019 to December 2020. He obtained his B.A. in mathematics at Brandeis University and his M.B.A. in finance 
at Columbia University Business School.

Paula Cloghessy has served as our Executive Vice President and Chief People Officer since February 2022. Previously, Ms. Cloghessy served in roles of 
increasing seniority at Translate Bio, Inc., or Translate Bio, a biotechnology company acquired by Sanofi S.A., or Sanofi, a global biopharmaceutical 
company, from 2016 to December 2021, culminating in her role as Chief People Officer.  In these roles, Ms. Cloghessy was responsible for leading human 
resources and organizational development and performance. Prior to Translate Bio, Ms. Cloghessy held senior roles at Joule Unlimited Technologies, Inc. 
and Interleukin Genetics, Inc. Ms. Cloghessy received her B.A. in Psychology from University of Massachusetts, Boston.

Thomas J. DesRosier has served as our Chief Legal Officer, Executive Vice President, and Secretary since May 2016. Previously, he served as Executive 
Vice President, Chief Legal and Administrative Officer and Secretary of ARIAD Pharmaceuticals, Inc., a biopharmaceutical company, from 2015 to 2016, 
Executive Vice President, Chief Legal and Administrative Officer and Secretary of Cubist Pharmaceuticals, Inc., or Cubist, a biopharmaceutical company, 
from 2014 to 2015 and Senior Vice President, Chief Legal Officer and Secretary of Cubist from 2013 to 2014. Before that, Mr. DesRosier served as Senior 
Vice President, General Counsel North America of Sanofi from 2011 to 2013. From 1999 to 2011, Mr. DesRosier held leadership roles of increasing 
seniority within the legal group of Genzyme Corporation, a biotechnology company, culminating in his role as Senior Vice President, Chief Legal Officer. 
Mr. DesRosier has served as a member of the board of directors of Avanir Pharmaceuticals, a privately held company and wholly-owned subsidiary of 
Otsuka Pharmaceutical Company, Ltd., since June 2017. Mr. DesRosier earned a B.A. in Chemistry from the University of Vermont and a J.D. from Wake 
Forest University School of Law.

David S. Ege, Ph.D. has served as our Executive Vice President and Chief Technology Officer since October 2020. Previously, Dr. Ege served in a variety 
of technical and leadership roles in R&D and manufacturing at Merck from November 2003 to October 2020, most recently as global lead for digital 
strategy in Merck’s Manufacturing Division from June 2019 to October 2020. From April 2015 to June 2019, Dr. Ege served as Executive Director of 
Vaccines & Biologics Manufacturing at Merck’s plant in Elkton, Virginia, where he led bulk manufacturing operations for Gardasil®, Gardasil9® and 
Cancidas®. He has contributed to the successful first-in-class licensure and launch of cervical cancer vaccines, Gardasil® (2006) and Gardasil9® (2014), 
and a breakthrough cancer immunotherapy, Keytruda® (2014). He graduated summa cum laude from Princeton with a B.S.E. in chemical engineering and 
earned his Ph.D. in chemical engineering from the University of Pennsylvania.

Matthew Henn, Ph.D. has served as our Executive Vice President and Chief Scientific Officer since February 2019. Since joining our company at its launch 
in June 2012, he has held positions of increasing seniority, most recently as Executive Vice President, Head of Discovery and Microbiome R&D from 
January 2018 to February 2019, and previously as Senior Vice President, Head of Discovery and Bioinformatics from June 2012 to January 2018. Prior to 
joining our company, he was the Director of Viral Genomics and Assistant Director of the Genome Sequencing Center for Infectious Diseases at the Broad 
Institute of the Massachusetts Institute of 

99

 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Technology and Harvard. He currently serves on the scientific advisory boards of the Forsyth Institute and Growcentia, Inc., an agricultural microbiome 
company. Dr. Henn earned his B.S. in Ecology and Evolutionary Sciences from the University of New Hampshire and his Ph.D. in Ecosystem Sciences 
from the University of California at Berkeley, where he was a NASA Earth Systems Sciences Fellow, and trained as a NSF Postdoctoral Fellow in 
Microbiology at Duke University.

Lisa von Moltke, M.D. has served as our Executive Vice President and Chief Medical Officer since March 2020. Previously, Dr. von Moltke worked for 
Alkermes, Inc., a pharmaceutical company, from June 2015 to December 2019, where she served in roles of increasing seniority, culminating as Senior 
Vice President and Head of Clinical Development. Beginning in June 2015, Dr. Moltke served as VP Clinical Pharmacology, DMPK and Bioanalytics, was 
promoted to Head of Clinical Development in November 2015, and became SVP in June 2018. Prior to joining Alkermes, Dr. von Moltke served as Vice 
President Clinical Pharmacology at Sanofi/Genzyme Corporation, a biotechnology company, from 2009 to 2015 and was US Head Clinical & Exploratory 
Pharmacology Sciences (CEP) and Early Development. Starting in 2014 she was Head CEP for Japan and China regions. From 2006 to 2009, Dr. von 
Moltke was Head, Translational Medicine for the Takeda Oncology Company, a biopharmaceutical company, in Cambridge, MA. She has served as 
President of the American College of Clinical Pharmacology, and as the Editor-in-Chief of The Journal of Clinical Pharmacology. Dr. von Moltke earned a 
B.A. degree at Wellesley College and her M.D. from Michigan State University, College of Human Medicine.

Teresa L. Young, Ph.D. has served as our Executive Vice President, Chief Commercial and Strategy Officer since June 2020. Previously, Dr. Young served 
as Vice President, Global Commercial Strategy at Sage Therapeutics from March 2018 to June 2020, where she led development of Sage’s global 
commercial capabilities, including global marketing, insights and analytics and new product planning. Prior to that, she held commercial leadership roles of 
increasing responsibility at Bristol-Myers Squibb from November 2010 to March 2018, culminating in her role as Vice President and General Manager, 
Cardiovascular, in which she led the global ELIQUIS® business to become the company’s largest product by revenue. Earlier in her career, Dr. Young held 
marketing and sales roles at GlaxoSmithKline from June 1993 to November 2010, where she catalyzed growth for the company’s Urology, Diabetes and 
NeuroHealth organizations. Dr. Young is a member of the Women in Bio and Healthcare Businesswomen’s Association and served on the Advisory Board 
of the Healthcare Businesswomen’s Association. Dr. Young received her B.S. in pharmacy and her Ph.D. in healthcare marketing from the University of 
South Carolina.

Our board of directors has adopted a Code of Business Conduct and Ethics applicable to all officers, directors and employees, which is available on 

our website at www.serestherapeutics.com in the “Investors and News” section under “Corporate Governance.” We intend to satisfy the disclosure 
requirement under Item 5.05 of Form 8-K regarding amendment to, or waiver from, a provision of our Code of Business Conduct and Ethics, as well as 
Nasdaq’s requirement to disclose waivers with respect to directors and executive officers, by posting such information on our website at the address and 
location specified in the preceding sentence. The information contained on our website is not incorporated by reference into this Annual Report on Form 
10-K.

Code of Ethics

Other

The remainder of the information required to be disclosed by this item will be contained in the Proxy Statement for our Annual Meeting of 

Stockholders scheduled to be held on June 22, 2022 and is incorporated herein by reference.

Item 11. Executive Compensation

The information required to be disclosed by this item will be contained in the Proxy Statement for our Annual Meeting of Stockholders scheduled to 

be held on June 22, 2022 and is incorporated herein by reference.

Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

The information required to be disclosed by this item will be contained in the Proxy Statement for our Annual Meeting of Stockholders scheduled to 

be held on June 22, 2022 and is incorporated herein by reference.

Item 13. Certain Relationships and Related Transactions and Director Independence

The information required to be disclosed by this item will be contained in the Proxy Statement for our Annual Meeting of Stockholders scheduled to 

be held on June 22, 2022 and is incorporated herein by reference.

Item 14. Principal Accountant Fees and Services

The information required to be disclosed by this item will be contained in the Proxy Statement for our Annual Meeting of Stockholders scheduled to 

be held on June 22, 2022 and is incorporated herein by reference.

100

Item 15. Exhibits and Financial Statements Schedules

(a)(1) Financial Statements.

PART IV

See the “Index to Consolidated Financial Statements” on page F-1 below for the list of financial statements filed as part of this report.

(a)(2) Financial Statement Schedules.

All schedules have been omitted because they are not required or because the required information is given in the Consolidated Financial Statements 

or Notes thereto set forth below beginning on page F-1.

(a)(3) Exhibits.

The following is a list of all exhibits filed as a part of this Annual Report on Form 10-K.

Exhibit Description

Form  

File No.

  Exhibit

Incorporated by Reference

Exhibit
Number

  3.1

  3.2

  4.1

  4.2

10.1#

10.2#

10.3#

10.4#

10.5

10.6

10.7

10.8#

10.9#

10.10#

10.11#

10.12#

Filed/
Furnished
Herewith

Filing
Date

7/1/15

12/7/20

6/16/15

3/2/21

3/2/21

6/16/15

5/27/15

3.1

3.2

4.2

4.2

10.1

10.3

10.1

Restated Certificate of Incorporation, filed on July 1, 2015

Amended and Restated By-Laws

8-K

8-K

001-37465

001-37465

Specimen Stock Certificate evidencing the shares of common 
stock

S-1/A

333-204484

  Description of Capital Stock

2015 Incentive Award Plan and forms of award agreements 
thereunder

  2015 Employee Stock Purchase Plan

2012 Stock Incentive Plan, as amended and form of option 
agreement thereunder

  Non-Employee Director Compensation Program

Lease Agreement, dated April 1, 2015, by and between the 
Registrant and ARE-MA Region No. 38, LLC

  10-K

10-K

001-37465

001-37465

  S-1/A  

333-204484

S-1

333-204484

  10-Q

S-1

001-37465

333-204484

10.3

10.13

11/10/21  

5/27/15

Lease, dated November 11, 2015, by and between the Registrant 
and BMR-Sidney Research Campus, LLC

10-K

001-37465

10.13

3/14/16

Sublease Agreement dated July 1, 2019, by and between the 
Registrant and Flagship VL56, Inc., and Flagship VL58, Inc. 

Second Amended and Restated Employment Agreement, dated 
January 29, 2021, by and between the Registrant and Eric D. 
Shaff

Amended and Restated Employment Agreement, dated January 
29, 2021 by and between the Registrant and Thomas J. 
DesRosier

Second Amended and Restated Employment Agreement, dated 
January 29, 2021, by and between the Registrant and Matthew 
R. Henn, Ph.D.

Amended and Restated Employment Agreement, dated January 
29, 2021, by and between the Registrant and David S. Ege, 
Ph.D.

10-Q

8-K

8-K

8-K

001-37465

10.3

11/5/19

001-37465

10.1

2/1/21

001-37465

10.2

2/1/21

001-37465

10.3

2/1/21

10-Q

001-37465

10.2

8/3/21

Letter Agreement, dated November 4, 2021, by and between the 
Registrant and David S. Ege, Ph.D. 

10-Q

001-37465

10.2

11/10/21

101

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
10.13#

10.14#

10.15#

10.16#

10.17

10.18

10.19

10.20^

10.21

10.22^

10.23

10.24†

10.25†

21.1

23.1

31.1

31.2

32.1

32.2 

Amended and Restated Employment Agreement, dated January 
29, 2021, by and between the Registrant and Teresa L. Young 

  Amended and Restated Employment Agreement, dated January 
29, 2021, by and between the Registrant and Lisa von Moltke, 
M.D.

  Employment Agreement, dated May 10, 2021 by and between 

the Registrant and David Arkowitz 

  Employment Agreement, dated January 5, 2022, by and 

between the Registrant and Paula Cloghessy

10-K

001-37465

10.13

3/2/21

  10-K

001-37465

10.14  

3/2/21

  8-K

001-37465

10.1

5/20/21

Loan and Security Agreement, dated October 29, 2019, between 
the Registrant and Hercules Capital, Inc. 

8-K

001-37465

10.1

11/4/19

First Amendment to Loan and Security Agreement by and 
between the Registrant and Hercules Capital, Inc., dated April 
16, 2020

Second Amendment to Loan and Security Agreement, dated 
February 24, 2022 by and between the Registrant and Hercules 
Capital, Inc.

Collaboration and License Agreement, dated January 9, 2016, 
by and between the Registrant and Société des Produits Nestlé 
S.A.

Amendment No. 1 to the Collaboration and License Agreement, 
dated August 10, 2016, by and between the Registrant and 
Nestec Ltd.

Letter Agreement dated October 30, 2018, by and between the 
Registrant and Nestec Ltd. 

10-Q

001-37465

10.2

7/28/20

10-Q

001-37465

10.1

5/16/16

10-K

001-37465

10.22

3/6/19

10-K

001-37465

10.23

3/6/19

  Securities Purchase Agreement, dated August 12, 2020 by and 
between the Company and Société des Produits Nestlé S.A.

  8-K

001-37465

10.1

8/14/20

  License Agreement, dated July 1, 2021, by and between the 

Registrant and NHSc Pharma Partners

  Long Term Manufacturing Agreement, dated November 8, 
2021, by and between the Registrant and BacThera AG

  10-Q

001-37465

10.1

11/10/21    

  Subsidiaries of Seres Therapeutics, Inc.

  10-K

001-37465

21.1

3/2/20

Consent of PricewaterhouseCoopers LLP, Independent 
Registered Public Accounting Firm

Rule 13a-14(a)/15d-14(a) Certification of Chief Executive 
Officer

Rule 13a-14(a)/15d-14(a) Certification of Chief Financial 
Officer

  Section 1350 Certification of Chief Executive Officer

  Section 1350 Certification of Chief Financial Officer

101.INS

Inline XBRL Instance Document- the Instance Document does 
not appear in the interactive data file because its XBRL tags are 
embedded within the Inline XBRL document

101.SCH

  Inline XBRL Taxonomy Extension Schema Document

101.CAL

Inline XBRL Taxonomy Extension Calculation Linkbase 
Document

102

*

*

*

*

*

*

**

**

*

*

*

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
101.LAB

  Inline XBRL Taxonomy Extension Label Linkbase Document

101.PRE

101.DEF

104

Inline XBRL Taxonomy Extension Presentation Linkbase 
Document

Inline XBRL Taxonomy Extension Definition Linkbase 
Document

Cover Page Interactive Data File (formatted as Inline XBRL and 
contained in Exhibit 101)

*

*

*

*

* Filed herewith.
** Furnished herewith.
# Indicates management contract or compensatory plan. 
^ Confidential treatment has been granted with respect to redacted portions of this exhibit. Redacted portions of this exhibit have been filed separately with 
the SEC.
† Portions of this exhibit (indicated by asterisks) have been omitted pursuant to Regulation S-K, Item 601(b)(10)(iv). Such omitted information is both (i) 
not material and (ii) the type that the Registrant treats as private or confidential.

Item 16. Form 10-K Summary

None.

103

   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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 1, 2022

  SERES THERAPEUTICS, INC.

  By:

  /s/ Eric D. Shaff
  Eric D. Shaff
  President, Chief Executive Officer and Director

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the 

registrant and in the capacities and on the dates indicated.

/s/ Eric D. Shaff

Signature

Eric D. Shaff

/s/ David Arkowitz

David Arkowitz

Title

Date

  President, Chief Executive Officer
  and Director
  (Principal Executive Officer)
  Executive Vice President, Chief Financial Officer, 

and Head of Business Development

  (Principal Financial and Accounting Officer)

/s/ Stephen Berenson

  Chairman of the Board

Stephen Berenson

/s/ Dennis A. Ausiello

Dennis A. Ausiello, M.D.

/s/ Paul R. Biondi

Paul R. Biondi

/s/ Willard H. Dere

Willard H. Dere, M.D.

/s/ Grégory Behar

/s/ Kurt C. Graves

Grégory Behar

Kurt C. Graves

/s/ Richard N. Kender

Richard N. Kender

/s/ Meryl S. Zausner

Meryl S. Zausner

  Director

  Director

  Director

  Director

  Director

  Director

  Director

104

March 1, 2022

March 1, 2022

March 1, 2022

March 1, 2022

March 1, 2022

March 1, 2022

March 1, 2022

March 1, 2022

March 1, 2022

March 1, 2022

  
 
 
   
   
 
   
 
   
 
 
 
 
 
 
 
 
 
 
 
   
 
   
 
   
 
 
 
 
 
 
   
   
 
 
 
 
 
 
   
   
 
 
 
 
 
 
   
 
 
 
   
 
 
 
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
 
 
 
 
 
   
   
 
   
   
 
   
   
 
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

Report of Independent Registered Public Accounting Firm (PCAOB ID 238)
Consolidated Balance Sheets as of December 31, 2021 and 2020
Consolidated Statements of Operations and Comprehensive Loss for the years ended December 31, 2021, 2020 and 2019
Consolidated Statements of Stockholders’ Equity (Deficit) as of December 31, 2021, 2020 and 2019
Consolidated Statements of Cash Flows for the years ended December 31, 2021, 2020 and 2019
Notes to Consolidated Financial Statements

Page

F-2
F-4
F-5
F-6
F-7
F-8

F-1

 
 
 
 
 
Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of Seres Therapeutics, Inc.

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Seres Therapeutics, Inc. and its subsidiaries (the “Company”) as of December 31, 2021 
and 2020, and the related consolidated statements of operations and comprehensive loss, of stockholders’ equity (deficit) and of cash flows for each of the 
three years in the period ended December 31, 2021, including the related notes (collectively referred to as the “consolidated financial statements”). We also 
have audited the Company's internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control - Integrated 
Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).  

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of 
December 31, 2021 and 2020, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2021 in 
conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material 
respects, effective internal control over financial reporting as of December 31, 2021, based on criteria established in Internal Control - Integrated 
Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, for maintaining effective internal control over financial reporting, 
and for its assessment of the effectiveness of internal control over financial reporting, included in Management's Annual Report on Internal Control Over 
Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the 
Company's internal control over financial reporting 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 audits to obtain reasonable 
assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective 
internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements 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. Our audit of internal 
control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness 
exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing 
such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

Emphasis of Matter
As discussed in Note 1 to the consolidated financial statements, the Company will require additional financing to fund future operations. Management’s 
evaluation of the events and conditions and management’s plans to mitigate these matters are also described in Note 1.  

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting 
and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control 
over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly 
reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit 
preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are 
being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding 
prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial 
statements.

F-2

  
Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of 
effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of 
compliance with the policies or procedures may deteriorate.

Critical Audit Matters

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 (i) relates to accounts or disclosures that are material to the consolidated 
financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters 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.

 Revenue Recognition – Collaboration and License Agreement with Société des Produits Nestlé S.A. (Nestlé) Recognized Under an Input Method

As described in Notes 2 and 12 to the consolidated financial statements, the Company recognizes revenue arising from a collaboration and license 
agreement with Nestlé, which totaled $10.4 million for the year ended December 31, 2021. The promised goods and services represent one combined 
performance obligation and the entire transaction price was allocated to that single combined performance obligation. When management concludes that a 
contract should be accounted for as a combined performance obligation and recognized over-time, management must then determine the period over which 
revenue should be recognized and the method by which to measure revenue. Management generally recognizes revenue using a cost-based input method, 
which measures the extent of progress towards completion based on the ratio of actual costs incurred to the total estimated costs expected upon satisfying 
the performance obligation. Due to the nature of the work required to be performed to satisfy the performance obligation, management’s estimation of costs 
expected is complex and requires significant judgment.

The principal considerations for our determination that performing procedures relating to revenue recognition for the collaboration and license agreement 
with Nestlé recognized under an input method is a critical audit matter are the significant judgment by management when determining the total estimated 
costs expected upon satisfying the performance obligation, which in turn led to significant auditor judgment, subjectivity and effort in performing 
procedures to evaluate the total estimated costs expected upon satisfying the performance obligation.  

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated 
financial statements. These procedures included testing the effectiveness of controls relating to the revenue arising from the collaboration and license 
agreement with Nestlé, including controls over the total estimated costs expected upon satisfying the performance obligation. These procedures also 
included, among others, evaluating and testing management’s process for determining the total estimated costs expected upon satisfying the performance 
obligation, which included testing actual costs incurred and evaluating the reasonableness of estimated costs to satisfy the performance obligation. 
Evaluating the reasonableness of estimated costs to satisfy the performance obligation involved assessing management’s ability to reasonably estimate 
costs to satisfy the performance obligation by (i) evaluating the appropriateness of changes to management’s estimates of total costs to satisfy the 
performance obligation; (ii) performing a comparison of management’s prior period cost estimates to actual costs incurred; and (iii) evaluating whether the 
cost estimates used by management were reasonable considering consistency with industry and company-specific data.    

/s/ PricewaterhouseCoopers LLP 
Boston, Massachusetts
March 1, 2022

We have served as the Company’s auditor since 2014.

F-3

 
  
 
 
SERES THERAPEUTICS, INC.
CONSOLIDATED BALANCE SHEETS
(In thousands, except share and per share data)

Assets
Current assets:

Cash and cash equivalents
Short term investments
Prepaid expenses and other current assets
Accounts receivable

Total current assets
Property and equipment, net
Operating lease assets
Restricted cash
Restricted investments
Long term investments
Other non-current assets

Total assets

Liabilities and Stockholder's Equity
Current liabilities:

Accounts payable
Accrued expenses and other current liabilities (1)
Operating lease liabilities
Short term portion of note payable, net of discount
Deferred revenue - related party

Total current liabilities

Long term portion of note payable, net of discount
Operating lease liabilities, net of current portion
Deferred revenue, net of current portion - related party
Other long-term liabilities (2)

Total liabilities

Commitments and contingencies (Note 14)
Stockholders’ equity:

Preferred stock, $0.001 par value; 10,000,000 shares authorized at December 31, 2021 and 2020; 
no shares issued and outstanding at December 31, 2021 and 2020
Common stock, $0.001 par value; 200,000,000 shares authorized at December 31, 2021  
   and 2020; 91,889,418 and 91,459,239 shares issued and outstanding 
   at December 31, 2021 and 2020
Additional paid-in capital
Accumulated other comprehensive loss
Accumulated deficit

Total stockholders’ equity
Total liabilities and stockholders’ equity

December 31,

2021

2020

180,002     $
110,704    
12,922    
—    
303,628    
17,938    
18,208    
8,000    
1,401    
495    
5,189    
354,859     $

13,735     $
45,094    
6,610    
—    
16,819    
82,258    
24,643    
17,958    
86,998    
11,495    
223,352    

116,049  
137,567  
5,774  
9,387  
268,777  
13,897  
9,041  
—  
1,400  
49,825  
—  
342,940  

4,018  
14,226  
5,115  
454  
22,602  
46,415  
24,639  
10,561  
85,572  
1,003  
168,190  

—    

—  

92    
745,829    
(60 )  
(614,354 )  
131,507    
354,859     $

91  
723,482  
(47 )
(548,776 )
174,750  
342,940  

  $

  $

  $

  $

[1] Includes related party amounts of $21,098 and $0 at December 31, 2021 and December 31, 2020, respectively (see Note 12)
[2] Includes related party amounts of $10,585 and $0 at December 31, 2021 and December 31, 2020, respectively (see Note 12)

The accompanying notes are an integral part of these consolidated financial statements.

F-4

 
 
 
 
 
 
   
 
 
     
   
 
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
   
 
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
   
 
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SERES THERAPEUTICS, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS
(In thousands, except share and per share data)

Revenue:

Collaboration revenue - related party
Grant revenue
Collaboration revenue

Total revenue

Operating expenses:

Research and development expenses
General and administrative expenses
Collaboration (profit) loss sharing - related party
Restructuring expenses

Total operating expenses

Loss from operations
Other (expense) income:

Interest income
Interest expense
Other (expense) income

Total other (expense) income, net

Net loss
Net loss per share attributable to common stockholders, basic and diluted
Weighted average common shares outstanding, basic and diluted
Other comprehensive loss:

Unrealized loss on investments, net of tax of $0
Currency translation adjustment

Total other comprehensive loss

Comprehensive loss

2021

Year Ended December 31,
2020

2019

143,857     $
1,070  
—  

144,927    

141,891     $
69,261    
(1,732 )  
—    
209,420    
(64,493 )  

2,870    
(2,910 )  
(1,045 )  
(1,085 )  
(65,578 )   $
(0.72 )   $

11,897     $
4,157  
17,161  
33,215    

90,570     $
30,775    
—    
—    
121,345    
(88,130 )  

946    
(2,924 )  
981    
(997 )  
(89,127 )   $
(1.12 )   $

91,702,866    

79,789,220    

(12 )  
(1 )  
(13 )  
(65,591 )   $

(47 )  
—    
(47 )  
(89,174 )   $

27,188  
1,102  
6,215  
34,505  

80,141  
24,748  
—  
1,492  
106,381  
(71,876 )

1,033  
(502 )
1,066  
1,597  
(70,279 )
(1.24 )
56,649,220  

—  
—  
—  
(70,279 )

  $

  $

  $
  $

  $

The accompanying notes are an integral part of these consolidated financial statements.

F-5

 
 
 
 
 
 
 
 
 
 
 
 
     
     
   
 
 
   
   
 
 
   
   
 
 
 
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SERES THERAPEUTICS, INC.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY (DEFICIT)
(In thousands, except share data)

Balance at December 31, 2018

Issuance of common stock from public
   offering, net of commissions, underwriting
   discounts and offering costs
Issuance of common stock from at the market equity 
offering
Issuance of common stock upon exercise of stock 
options
Issuance of common stock upon vesting of RSUs, net
   of tax withholdings
Issuance of common stock under ESPP plan
Stock-based compensation expense
Net loss

 Balance at December 31, 2019

Issuance of common stock from public
   offering, net of commissions, underwriting
   discounts and offering costs
Issuance of common stock from Securities Purchase 
Agreement, net of offering costs - related party
Issuance of common stock from at the market equity 
offering
Issuance of common stock upon exercise of stock 
options
Issuance of common stock upon vesting of RSUs, net
   of tax withholdings
Issuance of common stock under ESPP plan
Stock-based compensation expense
Other comprehensive loss
Net loss

 Balance at December 31, 2020

Issuance of common stock upon exercise of stock 
options
Issuance of common stock under ESPP plan
Issuance of common stock upon vesting of RSUs, net
   of tax withholdings
Stock-based compensation expense
Other comprehensive loss
Net loss

Balance at December 31, 2021

Common Stock

Shares
40,936,735     $

Par
Value

Additional
Paid-in
Capital

    Accumulated    
Other

    Comprehensive     Accumulated    

Loss

-     $

Deficit
(389,370 )  $

Total
Stockholders
Equity
(Deficit)

(48,045 )

41    $

341,284    $

28,818,578    

29     

60,498     

128,400    

90,125    

94,400    
75,014    
—  
—  
70,143,252  

—     

—     

—     
—     
—      
—      
70     

512     

145     

176     
296     
8,344      
—      
411,255      

12,075,000  

12     

243,736      

959,002  

5,787,681  

2,214,011  

125,000  
155,293  
—  
—  
—  
91,459,239  

329,112  
100,417  

650  
—  
—  
—  
91,889,418  

  $

1     

6     

2     

—      
—      
—      
—      
—      
91     

1      
—      

—      
—      
—      
—      
92    $

19,899      

24,767      

14,419      

120      
462      
8,824      
—      
—      
723,482      

1,298      
827      

—      
20,222      
—      
—      
745,829     $

—      

—      

—      

—      
—      
—      
—      
—      

—      

—    

—      

—      

—      
—      
—      
(47 )    
—      
(47 )    

—      
—      

—      
—      
(13 )    
—      
(60 )  $

—      

60,527  

—      

—      

—      
—      
—      
(70,279 )    
(459,649 )    

512  

145  

176  
296  
8,344  
(70,279 )
(48,324 )

—      

243,748  

19,900  

—      

24,773  

—      

14,421  

—      
—      
—      
—      
(89,127 )    
(548,776 )    

—      
—      

—      
—      
—      
(65,578 )    
(614,354 )   $

120  
462  
8,824  
(47 )
(89,127 )
174,750  

1,299  
827  

—  
20,222  
(13 )
(65,578 )
131,507  

The accompanying notes are an integral part of these consolidated financial statements.

F-6

 
 
 
 
 
 
 
 
   
 
   
 
   
 
   
 
 
 
 
 
 
 
 
   
 
 
   
 
 
 
   
   
   
 
   
 
 
 
 
 
 
   
 
 
 
 
 
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
       
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
   
 
 
SERES THERAPEUTICS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS
(In thousands)

Cash flows from operating activities:

Net loss
Adjustments to reconcile net loss to net cash provided by (used in)
   operating activities:

Stock-based compensation expense
Depreciation and amortization expense
Non-cash operating lease cost
Amortization of debt issuance costs
Accretion (amortization) of discount (premium) on issued debt securities
Loss on disposal of property and equipment
Collaboration (profit) loss sharing - related party
Changes in operating assets and liabilities:

Prepaid expenses and other current and non-current assets
Accounts receivable
Deferred revenue
Accounts payable
Operating lease liabilities
Accrued expenses and other liabilities (3)

Net cash provided by (used in) operating activities

Cash flows from investing activities:
Purchases of property and equipment
Purchases of investments
Sales and maturities of investments

Net cash provided by (used in) investing activities

Cash flows from financing activities:

Proceeds from public offering of common stock, net of commissions,
   underwriting discounts and offering costs
Proceeds from Securities Purchase Agreement, net of issuance costs -
   related party
Proceeds from issuance of note payable
Proceeds from at the market equity offering, net of commissions
Payments of debt issuance costs
Proceeds from exercise of stock options
Proceeds from issuance of common stock and restricted common stock
Issuance of common stock under ESPP plan
Repayment of notes payable

Net cash provided by financing activities

Net increase (decrease) in cash, cash equivalents and restricted cash
Effect of exchange rate changes on cash, cash equivalents and restricted cash
Cash, cash equivalents and restricted cash at beginning of year
Cash, cash equivalents and restricted cash at end of year
Supplemental disclosure of cash flow information:

Cash paid for interest

Supplemental disclosure of non-cash investing and financing
   activities:

Property and equipment purchases included in accounts payable and
   accrued expenses
Lease liability arising from obtaining right-of-use assets

Year Ended December 31,
2020  

2021    

2019  

  $

(65,578 )   $

(89,127 )   $

(70,279 )

20,222    
5,947    
3,275    
498    
2,526    
—    
(1,732 )  

(12,337 )  
9,387    
(4,357 )  
9,362    
(3,550 )  
43,025    
6,688    

(9,566 )  
(95,971 )  
169,625    
64,088    

8,824    
6,578    
2,315    
446    
551    
—    
—    

(2,186 )  
(7,602 )  
(11,565 )  
(1,159 )  
(4,456 )  
3,771    
(93,610 )  

(591 )  
(218,284 )  
59,984    
(158,891 )  

—    

243,748    

—    
—    
—    
—    
1,299    
—    
827    
(948 )  
1,178    
71,954    
(1 )  
116,049    
188,002     $

19,900    
—    
24,773    
—    
14,421    
120    
462    
—    
303,424    
50,923    
—    
65,126    
116,049     $

8,344  
7,603  
2,227  
281  
(172 )
103  
—  

3,257  
(1,785 )
(17,520 )
(1,460 )
(4,211 )
(2,908 )
(76,520 )

(1,002 )
(46,420 )
16,904  
(30,518 )

60,527  

—  
25,000  
512  
(425 )
145  
176  
296  
—  
86,231  
(20,807 )
—  
85,933  
65,126  

2,446     $

2,453     $

221  

874     $

12,442    

451     $
—    

62  
154  

  $

  $

  $

[3] Includes related party amounts of $31,683 and $0 at December 31, 2021 and December 31, 2020 respectively (see Note 12)

The accompanying notes are an integral part of these consolidated financial statements.

F-7

 
 
 
 
 
 
 
 
 
   
 
     
     
   
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
     
     
   
 
     
     
   
 
 
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

1.

Nature of the Business and Basis of Presentation

Seres Therapeutics, Inc. (the “Company”) was incorporated under the laws of the State of Delaware in October 2010 under the name Newco LS21, 
Inc. In October 2011, the Company changed its name to Seres Health, Inc., and in May 2015, the Company changed its name to Seres Therapeutics, Inc. 
The  Company  is  a  microbiome  therapeutics  platform  company  developing  a  novel  class  of  biological  drugs,  which  are  designed  to  treat  disease  by 
modulating  the  microbiome  to  restore  health  by  repairing  the  function  of  a  disrupted  microbiome  to  a  non-disease  state.    The  Company’s  lead  product 
candidate, SER-109, is designed to reduce further recurrences of Clostridioides difficle infection (“CDI”), a debilitating infection of the colon, in patients 
who have received antibiotic therapy for recurrent CDI by restructuring the colonic microbiome and changing its function.  If approved by the U.S. Food 
and Drug Administration (“FDA”), we believe SER-109 will be a first-in-field oral microbiome drug. Building upon SER-109, the Company is developing 
therapeutics, such as SER-155, to specifically target infections and antimicrobial resistance. SER-155, a microbiome therapeutic candidate consisting of a 
consortium  of  cultivated  bacteria,  is  designed  to  reduce  incidences  of  gastrointestinal  infections,  bloodstream  infections  and  graft  versus  host  disease 
(GvHD”) in patients receiving allogeneic hematopoietic stem cell transplantation (“allo-HSCT”). In addition, using its microbiome therapeutics platform, 
the Company is developing SER-287 and SER-301 to treat ulcerative colitis (“UC”).  The Company continues to evaluate microbiome pharmacokinetic 
and pharmacodynamic data from across its clinical and pre-clinical portfolios, using its reverse translation microbiome therapeutics capabilities to conduct 
research on various indications, including inflammatory and immune diseases, cancer, and metabolic diseases.    

The Company is subject to risks common to companies in the biotechnology industry including, but not limited to, new technological innovations, 
protection of proprietary technology, dependence on key personnel, compliance with government regulations and the need to obtain additional financing. 
Product candidates currently under development will require significant additional research and development efforts, including extensive preclinical and 
clinical  testing  and  regulatory  approval,  prior  to  commercialization.  These  efforts  require  significant  amounts  of  additional  capital,  adequate  personnel 
infrastructure and extensive compliance-reporting capabilities.

The  Company’s  product  candidates  are  in  development.  There  can  be  no  assurance  that  the  Company’s  research  and  development  will  be 
successfully  completed,  that  adequate  protection  for  the  Company’s  intellectual  property  will  be  obtained,  that  any  products  developed  will  obtain 
necessary government regulatory approval or that any approved products will be commercially viable. Even if the Company’s product development efforts 
are successful, it is uncertain when, if ever, the Company will generate significant revenue from product sales. The Company operates in an environment of 
rapid change in technology and substantial competition from pharmaceutical and biotechnology companies. In addition, the Company is dependent upon 
the services of its employees and consultants.

Under Accounting Standards Update (“ASU”) 2014-15, Presentation of Financial Statements—Going Concern (Subtopic 205-40) (“ASC 205-40”), 
the  Company  has  the  responsibility  to  evaluate  whether  conditions  and/or  events  raise  substantial  doubt  about  its  ability  to  meet  its  future  financial 
obligations as they become due within one year after the date that the financial statements are issued. As required by ASC 205-40, this evaluation shall 
initially not take into consideration the potential mitigating effects of plans that have not been fully implemented as of the date the financial statements are 
issued.

As of December 31, 2021, the Company had an accumulated deficit of $614,354 and cash, cash equivalents and short- and long-term investments of 
$291,201.  For  the  year  ended  December  31,  2021,  the  Company  incurred  a  net  loss  of  $65,578.    The  Company  expects  that  its  operating  losses  and 
negative cash flows will continue for the foreseeable future.  The Company expects that its cash, cash equivalents and short and long-term investments as 
of December 31, 2021 of $291,201, and proceeds, net of facility fees and expenses, of $27,600 received in February 2022 in connection with the Second 
Amendment (Note 18), will be sufficient to fund its operating expenses, capital expenditure requirements, and debt service obligations for at least the next 
12-months from issuance of the financial statements. The future viability of the Company beyond that point is dependent on its ability to raise additional 
capital to finance its operations.

The Company is eligible to receive contingent milestone payments under its license and collaboration agreement with Société des Produits Nestlé 
S.A., successor in interest to Nestec Ltd., and NHSc Pharma Partners (collectively, “Nestlé”) if certain development, regulatory approval or sales target 
milestones are achieved. NHSc Pharma Partners is affiliated with Société des Produits Nestlé S.A. and Nestlé Health Science US Holdings, Inc. (“Nestlé 
Health  Science”),  both  of  which  are  significant  stockholders  of  the  Company.  The  milestone  payments  are  uncertain  and  there  is  no  assurance  that  the 
Company will receive any of them.  Until such time, if ever, as the Company can generate substantial product revenue, the Company will finance its cash 
needs  through  a  combination  of  public  or  private  equity  offerings,  debt  financings,  governmental  funding,  collaborations,  strategic  partnerships  or 
marketing, distribution or licensing arrangements with third parties. The Company may not be able to obtain funding on acceptable terms, or at all. If the 
Company is unable to raise additional funds as and when needed, it would have a negative impact on the Company’s financial condition, which 

F-8

 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

may  require  the  Company  to  delay,  reduce  or  eliminate  certain  research  and  development  activities  and  reduce  or  eliminate  discretionary  operating 
expenses, which could constrain the Company’s ability to pursue its business strategies. 

The  accompanying  financial  statements  have  been  prepared  in  conformity  with  accounting  principles  generally  accepted  in  the  United  States  of 
America  (“GAAP”)  and  include  the  accounts  of  the  Company  and  its  wholly  owned  subsidiaries  after  elimination  of  all  intercompany  accounts  and 
transactions.

2.

Summary of Significant Accounting Policies

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported 
amounts  of  assets  and  liabilities,  the  disclosure  of  contingent  assets  and  liabilities  at  the  date  of  the  consolidated  financial  statements  and  the  reported 
amounts of revenue and expenses during the reporting periods. Significant estimates and assumptions reflected in these consolidated financial statements 
include, but are not limited to, revenue recognition and the accrual of research and development expenses. Estimates are periodically reviewed in light of 
changes in circumstances, facts and experience. Actual results could differ from the Company’s estimates.

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  revenue,  operating  expenses,  clinical  trials  and  employee-related  amounts,  will  depend  on  future  developments  that  are  highly 
uncertain,  including  new  information  that  may  emerge  concerning  COVID-19  and  the  actions  taken  to  contain  it  or  treat  its  impact  and  the  economic 
impact on local, regional, national and international markets. We have made estimates of the impact of COVID-19 within our financial statements and there 
may be changes to those estimates in future periods. Actual results could differ from the Company’s estimates.

Cash Equivalents

The  Company  considers  all  short-term,  highly  liquid  investments  with  original  maturities  of  90  days  or  less  at  acquisition  date  to  be  cash 
equivalents. Cash equivalents, which consist of money market accounts, commercial paper and corporate bonds purchased with original maturities of less 
than 90 days from the date of purchase, are stated at fair value.

Investments

The Company classifies its available-for-sale marketable debt securities as current assets on the consolidated balance sheet if they mature within one 
year from the balance sheet date.  Any available-for-sale marketable debt securities with maturities greater than one year from the balance sheet date are 
classified as long-term assets on the consolidated balance sheet.  

The  Company  classifies  all  of  its  marketable  debt  securities  as  available-for-sale  securities.  Accordingly,  these  marketable  debt  securities  are 
recorded  at  fair  value  and  unrealized  gains  and  losses  are  reported  as  a  separate  component  of  accumulated  other  comprehensive  loss  in  stockholders’ 
equity  (deficit).  The  cost  of  securities  sold  is  determined  on  a  specific  identification  basis,  and  realized  gains  and  losses  are  included  in  other  income 
(expense)  within  the  consolidated  statement  of  operations  and  comprehensive  loss.  If  any  adjustment  to  fair  value  reflects  a  decline  in  the  value  of  the 
investment  that  the  Company  considers  to  be  “other  than  temporary”,  the  Company  reduces  the  investment  to  fair  value  through  a  charge  to  the 
consolidated statement of operations and comprehensive loss. No such adjustments were necessary during the periods presented.

Restricted Investments

The Company held investments of $1,401 and $1,400 as of December 31, 2021 and December 31, 2020, respectively, in a separate restricted bank 
account  as  a  security  deposit  for  the  lease  of  the  Company’s  headquarters  in  Cambridge,  MA.  The  Company  has  classified  these  deposits  as  long-term 
restricted investments on its balance sheet.

Restricted Cash

The Company held restricted cash of $8,000 and $0 as of December 31, 2021 and December 31, 2020, respectively, which represents cash held for 
the benefit of the landlord for the Company's other leases. The Company has classified the restricted cash as long-term on its consolidated balance sheet as 
the underlying leases are greater than 1 year.

F-9

 
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Cash, cash equivalents and restricted cash were comprised of the following:

Cash and cash equivalents
Restricted cash, non-current
Total cash, cash equivalents and restricted cash

Concentration of Credit Risk and of Significant Suppliers

December 31

December 31,

2021      
180,002     $
8,000      
188,002     $

2020  
116,049  
—  
116,049  

  $

  $

Financial  instruments  that  potentially  expose  the  Company  to  concentrations  of  credit  risk  consist  primarily  of  cash,  cash  equivalents  and 
investments. The Company has all cash, cash equivalents and investments balances at accredited financial institutions, in amounts that exceed federally 
insured limits. The Company does not believe that it is subject to unusual credit risk beyond the normal credit risk associated with commercial banking 
relationships.

The  Company  is  dependent  on  third-party  manufacturers  to  supply  products  for  research  and  development  activities  of  its  programs,  including 

preclinical and clinical testing. These programs could be adversely affected by a significant interruption in the supply of such drug substance products.

Fair Value Measurements

Certain assets and liabilities are carried at fair value under GAAP. Fair value is defined as the exchange price that would be received for an asset or 
paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market 
participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of 
unobservable inputs. Financial assets and liabilities carried at fair value are to be classified and disclosed in one of the following three levels of the fair 
value hierarchy, of which the first two are considered observable and the last is considered unobservable:

•

•

•

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs (other than Level 1 quoted prices), such as quoted prices in active markets for similar assets or liabilities, quoted 
prices in markets that are not active for identical or similar assets or liabilities, or other inputs that are observable or can be corroborated by 
observable market data.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to determining the fair value of the 
assets or liabilities, including pricing models, discounted cash flow methodologies and similar techniques.

The Company’s cash equivalents and investments are carried at fair value, determined according to the fair value hierarchy described above. The 
Company’s  investments  in  certificates  of  deposit  are  carried  at  amortized  cost,  which  approximates  fair  value.  The  carrying  values  of  the  Company’s 
accounts receivable, prepaid expense and other current assets, accounts payable and accrued expenses approximates their fair value due to the short-term 
nature  of  these  assets  and  liabilities.  The  carrying  value  of  the  Company’s  long-term  debt  approximates  its  fair  value  (a  level  2  measurement)  at  each 
balance sheet date due to its variable interest rate, which approximates a market interest rate.

Property and Equipment

Property and equipment are stated at cost less accumulated depreciation. Depreciation expense is recognized using the straight-line method over the 
useful life of the asset. Laboratory equipment is depreciated over five years. Computer equipment and furniture and office equipment are depreciated over 
three years.  Leasehold  improvements  are  amortized  over  the  shorter  of  the  lease  term  or  the  estimated  useful  life  of  the  related  asset.  Expenditures  for 
repairs  and  maintenance  of  assets  are  charged  to  expense  as  incurred.  Upon  retirement  or  sale,  the  cost  and  related  accumulated  depreciation  of  assets 
disposed of are removed from the accounts and any resulting gain or loss is included in loss from operations.

Impairment of Long-Lived Assets

Long-lived assets consist of property and equipment. Long-lived assets to be held and used are tested for recoverability whenever events or changes 
in business circumstances indicate that the carrying amount of the assets may not be fully recoverable. Factors that the Company considers in deciding 
when to perform an impairment review include significant underperformance of the business in relation to expectations, significant negative industry or 
economic trends and significant changes or planned changes in the use of the assets. If an impairment review is performed to evaluate a long-lived asset for 
recoverability, the Company compares forecasts of undiscounted cash flows expected to result from the use and eventual disposition of the long-lived asset 
to its carrying value. An 

F-10

 
 
 
   
 
 
 
 
   
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

impairment loss would be recognized when estimated undiscounted future cash flows expected to result from the use of an asset are less than its carrying 
amount. The impairment loss would be based on the excess of the carrying value of the impaired asset over its fair value, determined based on discounted 
cash flows. To date, the Company has not recorded any impairment losses on long-lived assets.

Research and Development Costs

Research  and  development  costs  are  expensed  as  incurred.  Research  and  development  expenses  include  salaries,  stock-based  compensation  and 
benefits of employees, third-party license fees and other operational costs related to the Company’s research and development activities, including allocated 
facility-related expenses and external costs of outside vendors engaged to conduct both preclinical studies and clinical trials.

Research Contract Costs and Accruals

The Company has entered into various research and development contracts with research institutions and other companies. These agreements are 
generally cancelable, and related payments are recorded as research and development expenses as incurred. The Company records accruals for estimated 
ongoing  research  costs.  When  evaluating  the  adequacy  of  the  accrued  liabilities,  the  Company  analyzes  progress  of  the  studies,  including  the  phase  or 
completion of events, invoices received and contracted costs. Significant judgments and estimates are made in determining the accrued balances at the end 
of any reporting period. Actual results could differ from the Company’s estimates. The Company’s historical accrual estimates have not been materially 
different from the actual costs.

Patent Costs

All patent-related costs incurred in connection with filing and prosecuting patent applications are expensed as incurred due to the uncertainty about 

the recovery of the expenditure. Amounts incurred are classified as general and administrative expenses.

Accounting for Stock-Based Compensation

The Company measures all stock options and other stock-based awards granted to employees, non-employees, and directors based on the fair value 
on the date of the grant and recognizes compensation expense of those awards over the requisite service period, which is generally the vesting period of the 
respective award. Generally, the Company issues stock options, restricted stock units and restricted stock awards with only service-based vesting conditions 
and records the expense for these awards using the straight-line method. For stock options or restricted stock units issued with performance-based vesting 
conditions, the stock compensation expense related to these awards is recognized based on the grant date fair value when achievement of the performance 
condition is deemed probable.

The Company classifies stock-based compensation expense in its consolidated statement 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.

The  Company  accounts  for  forfeitures  of  stock-based  awards  as  they  occur  rather  than  applying  an  estimated  forfeiture  rate  to  stock-based 

compensation expense. 

The fair value of each stock option grant is estimated on the date of grant using the Black- Scholes option-pricing model. The Company estimates its 
expected stock volatility based on a blended rate of the Company's own common stock volatility and the average historical volatility of a publicly traded set 
of  peer  companies.  The  Company  uses  the  simplified  method  prescribed  by  Securities  and  Exchange  Commission  Staff  Accounting  Bulletin  No.  107, 
Share-Based  Payment,  to  calculate  the  expected  term  of  options  granted  to  employees,  non-employees  and  directors.  The  risk-free  interest  rate  is 
determined by reference to the U.S. Treasury yield curve in effect at the time of grant of the award for time periods approximately equal to the expected 
term  of  the  award.  Expected  dividend  yield  is  based  on  the  fact  that  the  Company  has  never  paid  cash  dividends  and  does  not  expect  to  pay  any  cash 
dividends in the foreseeable future. 

Revenue Recognition

The Company recognizes revenue in accordance with the guidance under ASC 606, Revenue from Contracts with Customers. ASC 606 applies to all 
contracts  with  customers,  except  those  contracts  that  are  within  the  scope  of  other  guidance,  such  as  leases,  insurance,  and  financial  instruments.  The 
Company enters into agreements that are within the scope of ASC 606, under which the 

F-11

 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Company licenses certain of the Company’s product candidates and performs research and development services in connection with such arrangements. 
The terms of these arrangements typically include payment of one or more of the following: nonrefundable up-front fees, reimbursement of research and 
development  costs,  development,  clinical,  regulatory  and  commercial  sales  milestone  payments,  and  royalties  on  net  sales  of  licensed  products.    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. When determining the timing and extent of revenue recognition for arrangements that 
the Company determines are within the scope of ASC 606, the Company performs the following five steps: 

a.

b.

c.

d.

e.

identify the contract(s) with a customer; 

identify the performance obligations in the contract; 

determine the transaction price; 

allocate the transaction price to the performance obligations in the contract; and 

recognize revenue when (or as) the entity satisfies a performance obligation. 

The Company only applies the five-step model to contracts when it is probable that the entity will collect the consideration to which it is entitled in 

exchange for the goods or services transferred 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 the contract to determine whether each promised good or service is a performance obligation. The promised goods or services in the Company’s 
arrangements typically consist of a license to the Company’s intellectual property and/or research and development services. The Company may provide 
options to additional items in such arrangements, which are accounted for as separate contracts when the customer elects to exercise such options, unless 
the  option  provides  a  material  right  to  the  customer.    Performance  obligations  are  promises  in  a  contract  to  transfer  a  distinct  good  or  service  to  the 
customer that (i) the customer can benefit from on its own or together with other readily available resources, and (ii) is separately identifiable from other 
promises in the contract. Goods or services that are not individually distinct performance obligations are combined with other promised goods or services 
until such combined group of promises meet the requirements of a performance obligation. 

The Company determines the transaction price based on the amount of consideration the Company expects to receive for transferring the promised 
goods  or  services  in  the  contract.  Consideration  may  be  fixed,  variable,  or  a  combination  of  both.  At  contract  inception  for  arrangements  that  include 
variable consideration, the Company estimates the probability and extent of consideration it expects to receive under the contract utilizing either the most 
likely  amount  method  or  expected  amount  method,  whichever  best  estimates  the  amount  expected  to  be  received.  The  Company  then  considers  any 
constraints on the variable consideration and includes in the transaction price variable consideration to the extent it is deemed probable that a significant 
reversal in the amount of cumulative revenue recognized will not occur when the uncertainty associated with the variable consideration is subsequently 
resolved.  

The Company then allocates the transaction price to each performance obligation based on the relative standalone selling price and recognizes as 
revenue the amount of the transaction price that is allocated to the respective performance obligation when (or as) control is transferred to the customer and 
the performance obligation is satisfied. For performance obligations which consist of licenses and other promises, the Company utilizes judgment to assess 
the nature of the combined performance obligation to determine whether the combined performance obligation is satisfied over time or at a point in time 
and, if over time, the appropriate method of measuring progress. The Company evaluates the measure of progress each reporting period and, if necessary, 
adjusts the measure of performance and related revenue recognition.

The Company records amounts as accounts receivable when the right to consideration is deemed unconditional. When consideration is received, or 
such consideration is unconditionally due, from a customer prior to transferring goods or services to the customer under the terms of a contract, a contract 
liability is recorded for deferred revenue.  As of December 31, 2021 and December 31, 2020, the Company had $0 and $1,186 of accounts receivable and 
$0 and $8,201 of unbilled accounts receivable, respectively. 

The Company does not assess whether a contract has a significant financing component if the expectation at contract inception is that the period 
between payment by the customer and the transfer of the promised goods or services to the customer will be one year or less. Incremental costs of obtaining 
a contract are expensed as and when incurred if the expected period over which the Company would have amortized the asset is one year or less, or the 
amount is immaterial.

F-12

 
 
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Collaboration Revenue

Arrangements  with  collaborators  may  include  licenses  to  intellectual  property,  research  and  development  services,  manufacturing  services  for 
clinical and commercial supply, and participation on joint steering committees. The Company evaluates the promised goods or services to determine which 
promises, or group of promises, represent performance obligations. In contemplation of whether a promised good or service meets the criteria required of a 
performance  obligation,  the  Company  considers  the  stage  of  development  of  the  underlying  intellectual  property,  the  capabilities  and  expertise  of  the 
customer relative to the underlying intellectual property, and whether the promised goods or services are integral to or dependent on other promises in the 
contract. When accounting for an arrangement that contains multiple performance obligations, the Company must develop judgmental assumptions, which 
may include market conditions, reimbursement rates for personnel costs, development timelines and probabilities of regulatory success to determine the 
stand-alone selling price for each performance obligation identified in the contract.  

When  the  Company  concludes  that  a  contract  should  be  accounted  for  as  a  combined  performance  obligation  and  recognized  over-time,  the 
Company must then determine the period over which revenue should be recognized and the method by which to measure revenue. The Company generally 
recognizes revenue using a cost-based input method.

Licenses of intellectual property

If a license to the Company’s intellectual property is determined to be distinct from the other performance obligations identified in the arrangement, 
the Company recognizes revenue allocated to the license when the license is transferred to the customer and the customer is able to use and benefit from the 
license.  For licenses that are bundled with other promises, the Company utilizes judgment to assess the nature of the combined performance obligation to 
determine whether the combined performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring 
progress for purposes of recognizing revenue associated with the bundled performance obligation.  The Company evaluates the measure of progress each 
reporting period and, if necessary, adjusts the measure of progress and related revenue recognition.

Milestone Payments

At  the  inception  of  each  arrangement  that  includes  developmental  and  regulatory  milestone  payments,  the  Company  evaluates  whether  the 
achievement of each milestone specifically relates to the Company’s efforts to satisfy a performance obligation or transfer a distinct good or service within 
a performance obligation. If the achievement of a milestone is considered a direct result of the Company’s efforts to satisfy a performance obligation or 
transfer a distinct good or service and the receipt of the payment is based upon the achievement of the milestone, the associated milestone value is allocated 
to that distinct good or service, otherwise it will be allocated to all performance obligations of the arrangement based on the initial allocation. 

The Company evaluates each milestone to determine when and how much of the milestone to include in the transaction price.  The Company first 
estimates the amount of the milestone payment that the Company could receive using either the expected value or the most likely amount approach. The 
Company primarily uses the most likely amount approach as that approach is generally most predictive for milestone payments with a binary outcome. 
Then, the Company considers whether any portion of that estimated amount is subject to the variable consideration constraint (that is, whether it is probable 
that  a  significant  reversal  of  cumulative  revenue  would  not  occur  upon  resolution  of  the  uncertainty).  The  Company  updates  the  estimate  of  variable 
consideration included in the transaction price at each reporting date which includes updating the assessment of the likely amount of consideration and the 
application of the constraint to reflect current facts and circumstances. 

Royalties

For arrangements that include sales-based royalties, including milestone payments based on the level of sales, and the license is deemed to be the 
predominant  item  to  which  the  royalties  relate,  the  Company  will  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,  the  Company  has  not 
recognized any revenue related to sales-based royalties or milestone payments based on the level of sales.

Manufacturing supply services

For arrangements  that  include  a  promise  of  supply  of  clinical  or  commercial  product,  the  Company  determines  if  the  supply  is  a  promise  in  the 
contract or a future obligation at the customer’s option. If determined to be a promise at inception of the contract, the Company evaluates the promise to 
determine whether it is a separate performance obligation or a component of a bundled performance obligation. If determined to be an option, the Company 
determines if the option provides a material right to the customer and if so, 

F-13

 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

accounts for the option as a separate performance obligation. If determined to be an option but not a material right, the Company accounts for the option as 
a separate contract when the customer elects to exercise the option.

Grant Revenue

The  Company  generates  revenue  from  government  contracts  that  reimburse  the  Company  for  certain  allowable  costs  for  funded  projects.  For 
contracts with government agencies, when the Company has concluded that it is the principal in conducting the research and development expenses, and 
where  the  funding  arrangement  is  considered  central  to  the  Company’s  ongoing  operations,  the  Company  classifies  the  recognized  funding  received  as 
revenue. 

The Company has concluded to recognize funding received as revenue, rather than as a reduction of research and development expenses, because 
the Company is the principal in conducting the research and development activities and these contracts are central to its ongoing operations. Revenue is 
recognized as the qualifying expenses related to the contracts are incurred. Revenue recognized upon incurring qualifying expenses in advance of receipt of 
funding  is  recorded  in  the  Company’s  consolidated  balance  sheet  as  accounts  receivable.  The  related  costs  incurred  by  the  Company  are  included  in 
research and development expense in the Company’s consolidated statements of operations and comprehensive loss. 

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 consolidated financial statements or in the Company’s tax returns. Deferred 
taxes are determined based on the difference between the financial statement 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 the deferred tax assets will not be realized, a valuation allowance is 
established through a charge to income tax expense.

The  Company  accounts  for  uncertainty  in  income  taxes  recognized  in  the  financial  statements  by  applying  a  two-step  process  to  determine  the 
amount  of  tax  benefit  to  be  recognized.  First,  the  tax  position  must  be  evaluated  to  determine  the  likelihood  that  it  will  be  sustained  upon  external 
examination by the taxing authorities. If the tax position is deemed more-likely-than-not to be sustained, the tax position is then assessed to determine the 
amount of benefit to recognize in the financial statements. The amount of the benefit that may be recognized is the largest amount that has a greater than 
50%  likelihood  of  being  realized  upon  ultimate  settlement.  The  provision  for  income  taxes  includes  the  effects  of  any  resulting  tax  reserves,  or 
unrecognized tax benefits, that are considered appropriate as well as the related net interest and penalties.

Segment Data

The  Company  manages  its  operations  as  a  single  segment  for  the  purposes  of  assessing  performance  and  making  operating  decisions.  The 
Company’s  singular  focus  is  on  developing  microbiome  therapeutics  to  treat  the  modulation  of  the  colonic  microbiome.  Revenue  to  date  has  been 
generated solely through the Company's agreements with its collaborators, all of which has been earned in the United States. All tangible assets are held in 
the United States.

Comprehensive Loss

Comprehensive loss includes net loss as well as other changes in stockholders’ equity (deficit) that result from transactions and economic events 
other than those with stockholders. For the years ended December 31, 2021, 2020 and 2019, other comprehensive income (loss) consisted of changes in 
unrealized gains (losses) from available-for-sale investments and a currency translation adjustment.

Net Loss per Share

Basic net loss per share is computed using the weighted average number of common shares outstanding during the period. Diluted net loss per share 
is computed using the sum of the weighted average number of common shares outstanding during the period and, if dilutive, the weighted average number 
of potential shares of common stock, including the assumed exercise of stock options and unvested restricted stock. The Company applies the two-class 
method to calculate its basic and diluted net loss per share attributable to 

F-14

 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

common stockholders. The two-class method is an earnings allocation formula that treats a participating security as having rights to earnings that otherwise 
would  have  been  available  to  common  stockholders.  However,  the  two-class  method  does  not  impact  the  net  loss  per  share  of  common  stock  as  the 
Company was in a net loss position for each of the periods presented.

The  Company’s  convertible  preferred  stock  contractually  entitle  the  holders  of  such  shares  to  participate  in  dividends  but  do  not  contractually 
require the holders of such shares to participate in losses of the Company. Similarly, restricted stock awards entitle the holder of such awards to dividends 
declared or paid by the board of directors, regardless of whether such awards are unvested, as if such shares were outstanding common shares at the time of 
the dividend. However, the unvested restricted stock awards are not entitled to share in the residual net assets (deficit) of the Company. Accordingly, in 
periods in which the Company reports a net loss attributable to common stockholders, diluted net loss per share attributable to common stockholders is the 
same as basic net loss per share attributable to common stockholders, since dilutive common shares are not assumed to have been issued if their effect is 
anti-dilutive.

Leases

In accordance with ASC 842, Leases, the Company determines if an arrangement is or contains a lease at inception. A contract is or contains a lease 
if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. The Company classifies leases at 
the lease commencement date as operating or finance leases and records a right-of-use asset and a lease liability on the consolidated balance sheet for all 
leases  with  an  initial  lease  term  of  greater  than  12  months.  Leases  with  an  initial  term  of  12  months  or  less  are  not  recorded  in  the  balance  sheet,  but 
payments are recognized as expense on a straight-line basis over the lease term. The Company has elected not to recognize leases with terms of 12 months 
or less. 

A lease qualifies as a finance lease if any of the following criteria are met at the inception of the lease: (i) there is a transfer of ownership of the leased asset 
to the Company by the end of the lease term, (ii) the Company holds an option to purchase the leased asset that it is reasonably certain to exercise, (iii) the 
lease term is for a major part of the remaining economic life of the leased asset, (iv) the present value of the sum of lease payments equals or exceeds 
substantially all of the fair value of the leased asset, or (v) the nature of the leased asset is specialized to the point that it is expected to provide the lessor no 
alternative use at the end of the lease term. 

The Company enters into contracts that contain both lease and non-lease components. Non-lease components may include maintenance, utilities, and other 
operating costs. The Company combines the lease and non-lease components of fixed costs in its lease arrangements as a single lease component. Variable 
costs, such as utilities or maintenance costs, are not included in the measurement of right-of-use assets and lease liabilities, but rather are expensed when 
the event determining the amount of variable consideration to be paid occurs.

Finance and operating lease assets and liabilities are recognized at the lease commencement date based on the present value of the lease payments over the 
lease term using the discount rate implicit in the lease. If the rate implicit is not readily determinable, the Company utilizes an estimate of its incremental 
borrowing rate based upon the available information at the lease commencement date. Operating lease assets are further adjusted for prepaid or accrued 
lease payments. Operating lease payments are expensed using the straight-line method as an operating expense over the lease term. The Company’s lease 
terms may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise that option. Finance lease assets are 
amortized  to  depreciation  expense  using  the  straight-line  method  over  the  shorter  of  the  useful  life  of  the  related  asset  or  the  lease  term.  Finance  lease 
payments are bifurcated into (i) a portion that is recorded as imputed interest expense and (ii) a portion that reduces the finance liability associated with the 
lease. 

Recently Adopted Accounting Pronouncements

In November 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2018-18, Collaborative 
Arrangements (Topic 808): Clarifying the Interaction between Topic 808 and Topic 606 (“ASU 2018-18”).  This standard makes targeted improvements for 
collaborative arrangements as follows:

•

•

Clarifies  that  certain  transactions  between  collaborative  arrangement  participants  should  be  accounted  for  as  revenue  under  ASC  606, 
Revenue from Contracts with Customers, when the collaborative arrangement participant is a customer in the context of a unit of account.  
In  those  situations,  all  the  guidance  in  ASC  606  should  be  applied,  including  recognition,  measurement,  presentation  and  disclosure 
requirements; 

Adds unit-of-account guidance to ASC 808, Collaborative Arrangements, to align with the guidance in ASC 606 (that is, a distinct good 
or service) when an entity is assessing whether the collaborative arrangement or a part of the arrangement is within the scope of ASC 606; 
and

F-15

 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

•

Precludes a company from presenting transactions with collaborative participants that are not directly related to sales to third parties with 
revenue recognized under ASC 606 if the collaborative arrangement participant is not a customer.  

This standard became effective for the Company on January 1, 2020 and did not have a material impact on the Company’s consolidated financial 

statements and related disclosures. 

In August 2018, the FASB issued ASU No. 2018-13, Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement 
(“ASU 2018-13”). This standard modifies certain disclosure requirements on fair value measurements. This standard became effective for the Company on 
January 1, 2020 and did not have a material impact on the Company’s disclosures. 

Recently Issued Accounting Pronouncements

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial 
Instruments (‘‘ASU 2016-13’’), which requires the measurement and recognition of expected credit losses for financial assets held at amortized cost. ASU 
2016-13  replaces  the  existing  incurred  loss  impairment  model  with  an  expected  loss  model.  It  also  eliminates  the  concept  of  other-than-temporary 
impairment  and  requires  credit  losses  related  to  available-for-sale  debt  securities  to  be  recorded  through  an  allowance  for  credit  losses  rather  than  as  a 
reduction in the amortized cost basis of the securities. These changes may result in earlier recognition of credit losses. In November 2018, the FASB issued 
ASU No. 2018-19, Codification Improvements to Topic 326, Financial Instruments—Credit Losses, which narrowed the scope and changed the effective 
date for non-public entities for ASU 2016-13. The FASB subsequently issued supplemental guidance within ASU No. 2019-05, Financial Instruments—
Credit Losses (Topic 326): Targeted Transition Relief (‘‘ASU 2019-05’’). ASU 2019-05 provides an option to irrevocably elect the fair value option for 
certain  financial  assets  previously  measured  at  amortized  cost  basis.  For  public  entities  that  are  Securities  and  Exchange  Commission  filers,  excluding 
entities  eligible  to  be  smaller  reporting  companies,  ASU  2016-13  is  effective  for  annual  periods  beginning  after  December  15,  2019,  including  interim 
periods within those fiscal years. For all other entities, ASU 2016-13 is effective for annual periods beginning after December 15, 2022, including interim 
periods  within  those  fiscal  years.  Early  adoption  is  permitted.  This  standard  will  be  effective  for  the  Company  on  January  1,  2022.  The  Company  is 
currently evaluating the potential impact that this standard may have on its consolidated financial statements and related disclosures. 

3.

Fair Value of Financial Assets and Liabilities

The following tables present the Company’s fair value hierarchy for its assets and liabilities that are measured at fair value on a recurring basis (in 

thousands):

Cash Equivalents:

Money market funds
Commercial paper

Investments:

Commercial paper
Corporate bonds
Government securities

Cash Equivalents:

Money market funds
Commercial paper
Corporate bonds

Investments:

Commercial paper
Corporate bonds
Certificate of deposits
Government securities

Fair Value Measurements as of December 31, 2021 Using:

Level 1

Level 2

Level 3

Total

70,322     $
—      

—     $
—      
—      
70,322     $

—     $
3,999      

6,250     $
40,095      
64,854      
115,198     $

—     $
—      

—     $
—      
—      
—     $

70,322  
3,999  

6,250  
40,095  
64,854  
185,520  

Fair Value Measurements as of December 31, 2020 Using:

Level 1

Level 2

Level 3

Total

35,480     $
—      
—      

—     $
—      
—      
—      
35,480     $

—     $
10,313      
2,014      

12,343     $
68,289      
2,272      
104,488      
199,719     $

—     $
—      
—      

—     $
—     $
—     $
—      
—     $

35,480  
10,313  
2,014  

12,343  
68,289  
2,272  
104,488  
235,199  

  $

  $

  $

  $

  $

  $

F-16

 
 
 
 
 
 
 
 
 
   
   
   
 
 
     
     
     
   
   
 
     
     
     
   
   
   
 
 
 
 
 
 
 
   
   
   
 
 
     
     
     
   
   
   
 
     
     
     
   
   
   
   
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Money market funds were valued by the Company based on quoted market prices, which represent a Level 1 measurement within the fair value 
hierarchy. Commercial paper, government securities, certificates of deposit and corporate bonds were valued by the Company using quoted prices in active 
markets for similar securities, which represent a Level 2 measurement within the fair value hierarchy. There were no transfers between Level 1 or Level 2 
during the years ended December 31, 2021 and 2020.

As of December 31, 2021 and 2020 the Company held a restricted investment of $1,401 and $1,400, respectively, which represents a certificate of 

deposit that is classified as Level 2 in the fair value hierarchy.

4.

Investments

Investments by security type consisted of the following at December 31, 2021 and December 31, 2020 (in thousands):

Investments:

Commercial paper
Corporate bonds
Government securities

Investments:

Commercial paper
Corporate bonds
Certificate of deposits
Government securities

Amortized
Cost

Gross

Gross

Unrealized Gain    

Unrealized Loss    

Fair
Value

December 31, 2021

  $

  $

6,250     $
40,123      
64,885      
111,258     $

—    $
—     
—     
—    $

—     $
(28 )    
(31 )    
(59 )   $

6,250  
40,095  
64,854  
111,199  

Amortized
Cost

Gross
Unrealized Gain

Gross
Unrealized Loss

Fair
Value

December 31, 2020

  $

  $

12,343     $
68,333      
2,272      
104,491      
187,439     $

—     $
8      

—  

6      
14     $

—     $
(52 )   $
—     $
(9 )    
(61 )   $

12,343  
68,289  
2,272  
104,488  
187,392  

Investments with original maturities of less than 90 days are included in cash and cash equivalents on the consolidated balance sheets and are not 
included in the table above. Investments with maturities of less than twelve months are considered current assets and those investments with maturities 
greater than twelve months are considered non-current assets.

Excluded from the table above is a restricted investment of $1,400 as the cost approximates current fair value. 

The  amortized  cost  and  fair  value  of  investments  in  commercial  paper,  corporate  bonds,  certificates  of  deposit  and  government  securities  by 

contractual maturity, as of December 31, 2021 were as follows (in thousands):

Due in 1-year or less
Due after 1-year through 5-years

Available-for-Sale

Cost

Fair Value

  $

  $

110,762     $
496    
111,258     $

110,704  
495  
111,199  

The  amortized  cost  and  fair  value  of  investments  in  commercial  paper,  corporate  bonds,  certificates  of  deposit  and  government  securities  by 

contractual maturity, as of December 31, 2020 were as follows (in thousands):

Due in 1-year or less
Due after 1-year through 5-years

Available-for-Sale

Cost

Fair Value

  $

  $

137,588    $
49,851   
187,439    $

137,567  
49,825  
187,392  

F-17

 
  
 
 
 
 
 
   
 
 
     
    
     
   
   
   
 
 
 
 
 
 
 
   
   
   
 
 
     
     
     
   
   
   
   
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
 
 
 
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

5.

Property and Equipment, Net

Property and equipment, net consisted of the following:

Laboratory equipment
Computer equipment
Furniture and office equipment
Leasehold improvements
Construction in progress

Less: Accumulated depreciation and amortization

December 31,

2021

2020

19,137     $
3,255      
1,219      
32,925      
1,670      
58,206      
(40,268 )    
17,938     $

15,985  
2,874  
1,033  
27,977  
348  
48,217  
(34,320 )
13,897  

  $

  $

Depreciation and amortization expense was $5,947, $6,578 and $7,603 for the years ended December 31, 2021, 2020 and 2019, respectively.

6.

Accrued Expenses and Other Current Liabilities

Accrued expenses and other current liabilities consisted of the following:

Development and clinical manufacturing costs
Payroll and payroll-related costs
Liability related to 2021 License Agreement (Note 12)
Facility and other

December 31,

2021

2020

11,147     $
9,216      
21,098      
3,633      
45,094     $

6,339  
6,734  
—  
1,153  
14,226  

  $

  $

7.

Leases 

The Company leases real estate, primarily laboratory, office and manufacturing space. The Company’s leases have remaining terms ranging from 
less than 1 year to 10 years. Certain leases include one or more options to renew, exercised at the Company’s sole discretion, with renewal terms that can 
extend the lease from one year to five years. The Company evaluated the renewal options in its leases to determine if it was reasonably certain that the 
renewal option would be exercised, and therefore should be included in the calculation of the operating lease assets and operating lease liabilities. Given 
the  Company’s  current  business  structure,  uncertainty  of  future  growth,  and  the  associated  impact  to  real  estate,  the  Company  concluded  that  it  is  not 
reasonably certain that any renewal options would be exercised. Therefore, the operating lease assets and operating lease liabilities only contemplate the 
initial lease terms. All the Company’s leases qualify as operating leases.

In  July  2019,  the  Company  entered  into  a  sublease  agreement  with  a  related  party  to  sublease  a  portion  of  its  office  and  laboratory  space  in 
Cambridge, Massachusetts. The term of the sublease agreement commenced in July 2019 and ends on the last day of the 24th calendar month following 
commencement, with no option to extend.  The  annual  rent  for  the  subleased  premises  will  be  approximately  $1,200  in  the  first  year  and  $1,300  in  the 
second year, which is greater than the annual rent owed by the Company to the landlord for the leased premises. The sublessee is obligated to pay all real 
estate  taxes  and  costs  related  to  the  subleased  premises,  including  cost  of  operations,  maintenance,  repair,  replacement  and  property  management.  The 
Company  concluded  that  the  sublease  is  an  operating  lease.  Consistent  with  the  Company’s  policy  election  for  lessor  operating  leases,  each  lease 
component and its associated non-lease components is accounted for as a single lease component.

F-18

 
 
 
 
 
 
 
   
 
   
   
   
   
  
   
   
  
 
 
 
 
 
 
 
 
 
   
 
   
   
   
 
 
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

The following table summarizes the presentation in the Company’s consolidated balance sheets of its operating leases:

Assets:
Operating lease assets

Liabilities:
Operating lease liabilities
Operating lease liabilities, net of current portion

Total operating lease liabilities

As of December 31, 
2021

As of December 31, 
2020

18,208  

  $

9,041  

6,610  
17,958  
24,568  

  $

  $

5,115  
10,561  
15,676  

  $

  $

  $

The following table summarizes the effect of lease costs in the Company’s consolidated statement of operations and comprehensive loss:

Operating lease costs
Short-term lease costs
Variable lease costs
Sublease income
Total lease costs

2021

Year Ended December 31,
2020

2019

  $

  $

5,170     $
1,452      
3,300      
(1,575 )    
8,347     $

4,163     $
1,457      
2,890      
(1,813 )    
6,697     $

4,532  
1,878  
3,022  
(890 )
8,542  

 During the years ended December 31, 2021, 2020, and 2019, the Company made cash payments for operating leases of $6,821, $6,302 and $6,514, 

respectively.

As of December 31, 2021, future payments of operating lease liabilities are as follows (in thousands):

2022
2023
2024
2025
2026 and thereafter
Total future payments of operating lease liabilities

Less: imputed interest

Present value of operating lease liabilities

As of December 31, 2021

8,512  
7,480  
2,392  
2,466  
10,891  
31,741  
(7,173 )
24,568  

  $

  $

As of December 31, 2021, the weighted average remaining lease term was 6.12 years and the weighted average incremental borrowing rate used to 
determine the operating lease liability was 10%.  As of December 31, 2020, the weighted average remaining lease term was 2.89 years and the weighted 
average incremental borrowing rate used to determine the operating lease liability was 11%.  

8.

Restructuring 

In  February  2019,  the  Company  implemented  corporate  changes  to  focus  its  resources  on  advancing  its  clinical-stage  therapeutic  candidates.  In 
connection  with  the  prioritization  of  these  therapeutic  candidates,  the  Company  made  changes  to  its  management  team  and  reduced  headcount  by 
approximately 30 percent.

During  the  year  ended  December  31,  2019  the  Company  recorded  charges  of  $1,492,  related  to  severance  and  other  termination  benefits.  No 
restructuring charges were recorded during the years ended December 31, 2021 and 2020. During the year ended December 31, 2019 the Company paid 
$1,299  related  to  the  restructuring  and  paid  out  the  remaining  $193  in  2020.  There  were  no  outstanding  restructuring  liabilities  included  in  accrued 
expenses and other current liabilities as of December 31, 2021 and 2020.  

F-19

 
 
 
 
 
 
 
 
   
 
   
 
 
   
 
   
 
   
 
   
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

9.

Notes Payable

On  October  29,  2019  (the  “Closing  Date”),  the  Company  entered  into  a  Loan  and  Security  Agreement  (the  “Loan  Agreement”)  with  Hercules 
Capital, Inc. (“Hercules”) pursuant to which a term loan in an aggregate principal amount of up to $50,000 (the “Original Credit Facility”) was available to 
the Company in three tranches, subject to certain terms and conditions. The first tranche of $25,000 was advanced to the Company on the Closing Date. 
The Company did not meet the milestone requirements for the second tranche under the Original Credit Facility, and as such, the additional amount up to 
$12,500 is not available for the Company to borrow. The Company elected not to borrow the third tranche of $12,500, which was available upon Hercules’ 
approval until June 30, 2021. Advances under the Original Credit Facility will bear interest at a rate equal to the greater of either (i) the Prime Rate (as 
reported in The Wall Street Journal) plus 4.40%, and (ii) 9.65%. Following an interest-only period of 24 months, principal payments are due in 24 equal 
monthly installments commencing December 1, 2021 and ending November 1, 2023.

The  Company  may  prepay  advances  under  the  Original  Credit  Facility,  in  whole  or  in  part,  at  any  time  subject  to  a  prepayment  charge  (the 
“Prepayment Premium”) equal to: (a) 3.0 % of amounts so prepaid, if such prepayment occurs during the first year following the Closing Date; (b) 2.0% of 
the  amount  so  prepaid,  if  such  prepayment  occurs  during  the  second  year  following  the  Closing  Date,  and  (c)  1.0%  of  the  amount  so  prepaid,  if  such 
prepayment occurs after the second year following the Closing Date.

Upon  prepayment  or  repayment  of  all  or  any  of  the  term  loans  under  the  Original  Credit  Facility,  the  Company  will  pay  (in  addition  to  any 
Prepayment Premium) an end of term charge of 4.85% of the aggregate funded amount under the Original Credit Facility. With respect to the first tranche, 
an end of term charge of $1,213 will be payable upon any prepayment or repayment. To the extent that the Company is provided additional advances under 
the Original Credit Facility, the 4.85% end of term charge will be applied to any such additional amounts.

The Original Credit Facility is secured by substantially all of the Company’s assets, other than the Company’s intellectual property. The Company 

has agreed to not pledge or secure its intellectual property to others.

Upon issuance, the first tranche was recorded as a liability with an initial carrying value of $24,575, net of debt issuance costs. The initial carrying 
value will be accreted to the repayment amount, which includes the outstanding principal plus the end of term charge, through interest expense using the 
effective interest rate method over the term of the debt. The effective interest rate is 11.47%.  As of December 31, 2021, the carrying value of the debt is 
$24,643. 

In February 2022, prior to the issuance of the consolidated financial statements for the year ended December 31, 2021, the Company entered into a 
second amendment to the loan and security agreement with Hercules (the “Second Amendment”), which amended the Original Credit Facility to refinance 
its short-term obligation on a long-term basis. The interest rate, interest-only period and prepayments under the Original Credit Facility, as well as certain 
covenants, are subject to amendments made pursuant to the Second Amendment (Note 18). As a result of the Second Amendment, the carrying value of the 
note payable is classified as a long-term liability on the Company’s consolidated balance sheet as of December 31, 2021. 

The  future  principal  payments  due  under  the  arrangement,  excluding  interest  and  the  end  of  term  charge,  are  as  follows  after  taking  into 

consideration the amendment to the Original Credit Facility that was entered into in February 2022:

Year Ending December 31,
2022
2023
2024
Total

Principal

-  
-  
24,051  
24,051  

  $

During the years ended December 31, 2021 and December 31, 2020, the Company recognized $2,910 and $2,899 of interest expense related to the 

Loan Agreement, respectively, which is reflected in interest expense on the consolidated statements of operations and comprehensive loss.

10.

Convertible Preferred Stock

On July 1, 2015, in connection with the closing of the initial public offering of the Company’s common stock (“IPO”), the Company effected its 

Restated Certificate of Incorporation, which authorizes the Company to issue 10,000,000 shares of preferred stock, $0.001 par value per share.

F-20

 
 
 
 
 
 
 
 
 
 
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

11.

Stockholders’ Equity Common Stock

On July 1, 2015, in connection with the closing of the IPO, the Company effected its Restated Certificate of Incorporation, which authorizes the 

Company to issue 200,000,000 shares of common stock, $0.001 par value per share.

On June 18, 2019, the Company completed an underwritten public offering, in which the Company sold 26,666,667 shares of its common stock at a 
price to the public of $2.25 per share. The aggregate net proceeds received by the Company from the offering were approximately $55,976, after deducting 
underwriting  discounts  and  commissions  and  offering  expenses  payable  by  the  Company.  In  addition,  the  Company  granted  the  underwriters  a  30-day 
option to purchase up to an additional 2,666,666 shares of common stock at the public offering price, less underwriting discounts and commissions.

On June 21, 2019, the Company sold an additional 2,151,911 shares of its common stock at a price to the public of $2.25 per share. The aggregate 
net proceeds received by the Company were approximately $4,551, after deducting underwriting discounts and commissions and offering expenses payable 
by the Company. 

On November 27, 2019, the Company entered into a Sales Agreement (the “2019 Sales Agreement”) with Cowen and Company, LLC (“Cowen”) to 
sell shares of the Company’s common stock, par value $0.001 per share (the “Common Stock”), with aggregate gross sales proceeds of up to $25,000, from 
time to time, through an “at the market” equity offering program under which Cowen will act as sales agent.  On March 18, 2020, in connection with filing 
an updated registration statement on Form S-3 (File No. 333-237033), the Company entered into a Sales Agreement (the “2020 Sales Agreement”), with 
Cowen on substantially the same terms as the 2019 Sales Agreement and terminated the 2019 Sales Agreement. From January 1, 2020 to December 31, 
2020 the Company sold 5,787,681 shares of common stock under the 2019 Sales Agreement and the 2020 Sales Agreement, as applicable, at an average 
price  of  approximately  $4.40  per  share,  raising  aggregate  net  proceeds  of  approximately  $24,773  after  deducting  an  aggregate  commission  of 
approximately 3%. 

On August 12, 2020, the Company entered into an underwriting agreement (the “Underwriting Agreement”) with Cowen and Company, LLC and 
Piper Sandler & Co., as representatives of the several underwriters named therein (collectively, the “Underwriters”), in connection with the issuance and 
sale  by  the  Company  in  a  public  offering  of  10,500,000  shares  of  the  Company’s  common  stock  at  a  public  offering  price  of  $21.50  per  share,  less 
underwriting discounts and commissions, pursuant to an effective shelf registration statement on Form S-3 (Registration No. 333-244401) and a related 
prospectus supplement filed with the Securities and Exchange Commission (the “SEC” and such public offering, the “offering”). Under the terms of the 
Underwriting Agreement, the Company granted the Underwriters an option exercisable for 30 days to purchase up to an additional 1,575,000 shares of its 
common stock at the public offering price, less underwriting discounts and commissions, which the underwriters exercised in full.  The Company received 
aggregate  net  proceeds  from  the  offering  of  approximately  $243,748  after  deducting  underwriting  discounts  and  commissions  and  offering  expenses 
payable by the Company.

Additionally on August 12, 2020, the Company entered into a Securities Purchase Agreement (the “Securities Agreement”) with Nestlé for the sale 
by the Company of 959,002 shares of the Company’s common stock at a purchase price of $20.855 per share (the “concurrent placement”). The Company 
received aggregate net proceeds from the concurrent placement of approximately $19,900 after deducting offering expenses payable by the Company.  The 
consummation of the concurrent placement was contingent upon the closing of the offering and the satisfaction of certain other customary conditions. The 
shares  were  offered  and  sold  to  Nestlé  pursuant  to  an  effective  registration  statement  on  Form  S-3  (File  No.  333-237033)  and  a  related  prospectus 
supplement filed with the SEC.

2012 Stock Incentive Plan

The Company’s 2012 Stock Incentive Plan, as amended, (the “2012 Plan”) provided for the Company to sell or issue common stock or restricted 
common stock, or to grant incentive stock options or nonqualified stock options for the purchase of common stock, to employees, members of the board of 
directors  and  consultants  of  the  Company.  The  2012  Plan  is  administered  by  the  board  of  directors,  or  at  the  discretion  of  the  board  of  directors,  by  a 
committee of the board of directors. The exercise prices, vesting and other restrictions are determined at the discretion of the board of directors, or their 
committee if so delegated, except that the exercise price per share of stock options may not be less than 100%  of  the  fair  market  value  of  the  share  of 
common stock on the date of grant and the term of stock option may not be greater than ten years. The Company generally granted stock-based awards with 
service conditions only (“service-based” awards).

Stock options granted under the 2012 Plan generally vest over four years and expire after ten years, although options have been granted with vesting 

terms less than four years. As of December 31, 2021, there were no shares available for future grant under the 2012 Plan.

F-21

 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

2015 Incentive Award Plan

On June 16, 2015, the Company’s stockholders approved the 2015 Incentive Award Plan (the “2015 Plan”), which became effective on June 25, 
2015.  The  2015  Plan  provides  for  the  grant  of  incentive  stock  options,  nonqualified  stock  options,  stock  appreciation  rights,  restricted  stock  awards, 
restricted stock units and other stock-based awards. The number of shares initially reserved for issuance under the 2015 Plan was the sum of (i) 2,200,000 
shares  of  common  stock  and  (ii)  the  number  of  shares  subject  to  awards  outstanding  under  the  2012  Plan  that  expire,  terminate  or  are  otherwise 
surrendered,  cancelled,  forfeited  or  repurchased  by  the  Company  on  or  after  the  effective  date  of  the  2015  Plan.  In  addition,  the  number  of  shares  of 
common stock that may be issued under the 2015 Plan is subject to increase on the first day of each calendar year, beginning in 2016 and ending in 2025, 
equal to the lesser of (i) 4% of the number of shares of the Company’s common stock outstanding on the last day of the preceding applicable calendar year 
and (ii) an amount determined by the Company’s board of directors.  

Stock options granted under the 2015 Plan generally vest over four years and expire after ten years, although options have been granted with vesting 

terms less than four years. As of December 31, 2021, there were 2,138,525 shares available for future grant under the 2015 Plan.

2015 Employee Stock Purchase Plan

On June 16, 2015, the Company’s stockholders approved the 2015 Employee Stock Purchase Plan (the “ESPP”), which became effective on June 
25, 2015. A total of 365,000 shares of common stock were reserved for issuance under the ESPP. In addition, the number of shares of common stock that 
may be issued under the ESPP automatically increase on the first day of each calendar year, beginning in 2016 and ending in 2025, by an amount equal to 
the lesser of (i) 400,000 shares, (ii) 1% of the number of shares of the Company’s common stock outstanding on the last day of the applicable preceding 
calendar year and (iii) an amount determined by the Company’s board of directors. Offering periods under the ESPP will commence when determined by 
the plan administrator. As of December 31, 2021, there were 100,417 shares issued under the ESPP and 2,391,764 shares were reserved and available for 
issuance under the ESPP.

The ESPP provides that eligible employees may contribute up to 15% of their eligible earnings toward the semi-annual purchase of the Company's 
common stock. The ESPP is qualified under Section 423 of the Internal Revenue Code. The employee's purchase price is derived from a formula based on 
the closing price of the common stock on the first day of the offering period versus the closing price on the date of purchase (or, if not a trading day, on the 
immediately preceding trading day).  The offering period under the ESPP has a duration of six months, and the purchase price with respect to each offering 
period beginning on or after such date is, until otherwise amended, equal to 85% of the lesser of (i) the fair market value of the Company's common stock 
at the commencement of the applicable six-month offering period or (ii) the fair market value of the Company's common stock on the purchase date. The 
Company estimates the fair value of common stock under the ESPP using a Black-Scholes valuation model. The fair value was estimated on the date of 
grant using the Black-Scholes option valuation model and the straight-line attribution approach with the following weighted-average assumptions: risk-free 
interest rate (1.2%); expected term (0.5 years); expected volatility (74.9%); and an expected dividend yield (0%).  The Company recorded $530, $200 and 
$109 of stock-based compensation expense under the ESPP for the twelve months ended December 31, 2021, 2020 and 2019, respectively.  

Stock Option Valuation

The  assumptions  that  the  Company  used  to  determine  the  fair  value  of  the  stock  options  granted  to  employees  and  directors  were  as  follows, 

presented on a weighted average basis:

Risk-free interest rate
Expected term (in years)
Expected volatility
Expected dividend yield

2021

Year Ended December 31,
2020

2019

0.73 %    
5.4  

106.5 %    
0 %    

1.26 %    
6.0  
73.3 %    
0 %    

2.64 %
6.0  
88.4 %
0 %

F-22

 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Stock Options

The following table summarizes the Company’s stock option activity for the twelve months ended December 31, 2021:

Outstanding as of December 31, 2020

Granted
Exercised
Forfeited

Outstanding as of December 31, 2021
Options exercisable as of December 31, 2021

Number of
Shares

10,037,130     $
3,603,744      
(329,112 )    
(1,794,573 )    
11,517,189     $
5,590,163     $

Weighted
Average
Exercise
Price

Weighted
Average
Remaining
Contractual
Term
(in years)

Aggregate
Intrinsic
Value

9.54  
19.30  
3.84  
12.19  
11.10  
8.62  

7.87     $

156,627  

7.42     $
6.09     $

28,006,768  
16,670,723  

The weighted average grant-date fair value of stock options granted during the years ended December 31, 2021, 2020 and 2019 was $15.33, $5.08, 
and $4.13  per  share,  respectively.  The  total  intrinsic  value  of  stock  options  exercised  during  the  years  ended  December  31,  2021,  2020,  and  2019  was 
$4,727, $37,255, and $244, respectively.

The aggregate intrinsic value of stock options is calculated as the difference between the exercise price of the stock options and the fair value of the 

Company’s common stock for those stock options that had exercise prices lower than the fair value of the Company’s common stock.

During the year ended December 31, 2019, the Company granted performance-based stock options to employees for the purchase of an aggregate of 
1.1 million shares of common stock with a grant date fair value of $4.58 per share. These stock options are exercisable only upon achievement of specified 
performance  targets.  As  of  December  31,  2021,  none  of  these  options  were  exercisable  because  none  of  the  specified  performance  targets  had  been 
achieved. Because achievement of the specified performance targets was not deemed probable as of December 31, 2021, the Company did not record any 
expense for these stock options from the dates of issuance through December 31, 2021.

During  the  three  months  ended  March  31,  2021,  the  Company  granted  performance-based  stock  options  to  employees  for  the  purchase  of  an 
aggregate  of  440  thousand  shares  of  common  stock  with  a  grant  date  fair  value  of  $14.93  per  share.  These  stock  options  are  exercisable  only  upon 
achievement  of  specified  performance  targets.  These  options  were  ultimately  forfeited  as  none  of  the  performance  targets  were  achieved.  Because 
achievement of the specified performance targets was not deemed probable in any period, the Company did not record any expense for these stock options 
from the dates of issuance through December 31, 2021.

Additionally, during the year ended December 31, 2021, the Company granted performance-based stock options to employees for the purchase of an 
aggregate  of  562  thousand  shares  of  common  stock  with  a  grant  date  fair  value  of  $5.53  per  share.  These  stock  options  are  exercisable  only  upon 
achievement of specified performance targets. As of December 31, 2021, none of these options were exercisable because none of the specified performance 
targets had been achieved. Because achievement of the specified performance targets was not deemed probable as of December 31, 2021, the Company did 
not record any expense for these stock options from the dates of issuance through December 31, 2021.

F-23

 
 
 
 
   
 
 
   
 
 
 
 
   
 
 
 
   
 
 
   
   
   
 
     
   
   
 
     
   
   
 
     
   
   
   
   
   
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Restricted Stock Units

The Company has granted restricted stock units with time-based vesting conditions.  The table below summarizes the Company’s restricted stock 

activity for the twelve months ended December 31, 2021: 

Unvested restricted stock units as of December 31, 2020

Granted
Forfeited
Vested

Unvested restricted stock units as of December 31, 2021

Number
of Shares

Weighted
Average Grant
Date Fair Value

6,500     $
768,998     $
(40,093 )   $
(650 )   $
734,755     $

25.36  
17.90  
23.15  
25.36  
17.68  

The aggregate intrinsic value of restricted stock units that vested during the years ended December 31, 2021, 2020 and 2019 was $16, $532, and 

$517, respectively. 

During the year ended December 31, 2021, the Company granted performance-based restricted stock awards to two employees for the purchase of 
an aggregate of 85 thousand shares of common stock with a grant date fair value of $9.59 per share and 40 thousand shares with a grant date fair value of 
$20.35  per  share.  These  restricted  stock  awards  vest  only  upon  achievement  of  specified  performance  targets.  As  of  December  31,  2021,  none  of  these 
awards were vested because none of the specified performance targets had been achieved. Because achievement of the specified performance targets was 
not deemed probable as of December 31, 2021, the Company did not record any expense for these awards from the dates of issuance through December 31, 
2021.

Stock-based Compensation

The Company recorded stock-based compensation expense related to stock options and restricted stock units in the following expense categories of 

its consolidated statements of operations and comprehensive loss:

Research and development expenses
General and administrative expenses

2021

Year Ended December 31,
2020

2019

  $

  $

10,146     $
10,076      
20,222     $

4,760     $
4,064      
8,824     $

4,613  
3,731  
8,344  

As  of  December  31,  2021,  the  Company  had  an  aggregate  of  $57,913  of  unrecognized  stock-based  compensation  cost,  which  is  expected  to  be 

recognized over a weighted average period of 3.33 years.

12.

Collaboration Revenue

License Agreement with NHSc Pharma Partners (Nestlé)

Summary of Agreement

In July 2021, the Company entered into a license agreement (the “2021 License Agreement”) with Nestlé. Under the terms of the Agreement, the 
Company  granted  Nestlé  a  co-exclusive,  sublicensable  (under  certain  circumstances)  license  to  develop,  commercialize  and  conduct  medical  affairs 
activities  for  (i)  therapeutic  products  based  on  the  Company's  microbiome  technology  (including  the  Company's  SER-109  product  candidate)  that  are 
developed  by  the  Company  or  on  the  Company's  behalf  for  the  treatment  of  CDI  and  recurrent  CDI,  as  well  as  any  other  indications  pursued  for  the 
products upon mutual agreement of the parties (the “2021 Field”) in the United States and Canada (the “2021 Licensed Territory”), and (ii) the Company's 
SER-109 product candidate and any improvements and modifications thereto developed pursuant to the terms of the 2021 License Agreement (the "2021 
Collaboration Products") for any indications in the 2021 Licensed Territory. The Company is responsible for completing development of SER-109 in the 
2021 Field in the United States until first regulatory approval for SER-109 is obtained. 

Nestlé has the sole right to commercialize SER-109 in the 2021 Licensed Territory in accordance with a commercialization plan. Both parties will 
perform  medical  affairs  activities  in  the  2021  Licensed  Territory  in  accordance  with  a  medical  affairs  plan.  The  Company  will  be  responsible  for  the 
manufacturing and supply for commercialization under a supply agreement that will be entered 

F-24

 
 
 
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
   
 
   
 
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

into between the parties. Both parties will perform pre-launch activities of SER-109 prior to the first commercial sale in the United States. The Company is 
responsible for funding the pre-launch activities until first commercial sale of SER-109 in the 2021 Licensed Territory and in accordance with a pre-launch 
plan,  up  to  a  specified  cap.  Following  first  commercial  sale  of  SER-109,  the  Company  will  be  entitled  to  an  amount  equal  to  50%  of  the  commercial 
profits. 

In  connection  with  the  2021  License  Agreement,  the  Company  received  an  upfront  payment  of  $175,000.  The  Company  is  eligible  to  receive 
additional  payments  of  up  to  $360,000  if  certain  regulatory  and  sales  milestones  are  achieved.  The  potential  future  milestone  payments  include  up  to 
$135,000 for the achievement of specified regulatory milestones and up to $225,000 for the achievement of specified net sales milestones.

The 2021 License Agreement continues in effect until all development and commercialization activities for all 2021 Collaboration Products in the 
2021 Licensed Territory have permanently ceased. The 2021 License Agreement may be terminated by either party upon sixty days’ written notice for the 
other party’s material breach that remains uncured during such sixty-day period, or immediately upon written notice for the other party’s insolvency. Nestlé 
may also terminate the 2021 License Agreement at-will (i) with twelve months’ prior written notice, effective only on or after the third anniversary of first 
commercial sale of the first 2021 Collaboration Product in the 2021 Licensed Territory, (ii) if first commercial sale of the first 2021 Collaboration Product 
in the 2021 Licensed Territory has not occurred by the fifth anniversary of the effective date of the 2021 License Agreement, with one hundred eighty days’ 
prior written notice, which must be provided during a specified period set forth in the 2021 License Agreement, or (iii) if regulatory approval for SER-109 
is not granted after submission by the Company of a filing seeking first regulatory approval as set forth in the development and regulatory activity plan, and 
the parties fail to agree on further development of SER-109 in accordance with the terms of the 2021 License Agreement, with one hundred eighty days’ 
prior written notice, which must be provided within a specified period set forth in the 2021 License Agreement. The Company may also terminate the 2021 
License Agreement immediately upon written notice if Nestlé challenges any licensed patent in the 2021 Licensed Territory. Upon termination of the 2021 
License  Agreement,  all  licenses  granted  to  Nestlé  by  the  Company  will  terminate.  If  the  Company  commits  a  material  breach  of  the  2021  License 
Agreement, Nestlé may elect not to terminate the 2021 License Agreement but instead apply specified adjustments to the payment terms and other terms 
and conditions of the 2021 License Agreement. 

Accounting Analysis

The 2021 License Agreement represents a separate contract between Nestlé and the Company. The 2021 License Agreement is within the scope of 

Accounting Standard Update 2018-18, Collaborative Arrangements (Topic 808), and has elements that are within the scope of Topic 606 and Topic 808. 

The Company identified the following promises in the 2021 License Agreement that were evaluated under the scope of Topic 606: (i) delivery of  a 
co-exclusive license for SER-109 to develop, commercialize and conduct medical affairs in the United States and Canada; (ii) services to be performed in 
accordance with the development and regulatory activity plan to obtain regulatory approval of SER-109 in the United States. The Company also evaluated 
whether  certain  options  outlined  within  the  2021  License  Agreement  represented  material  rights  that  would  give  rise  to  a  performance  obligation  and 
concluded that none of the options convey a material right to Nestlé and therefore are not considered separate performance obligations within the 2021 
License Agreement. 

The Company assessed the above promises and determined that the co-exclusive license for SER-109 and the services to obtain regulatory approval 
of SER-109 in the United States are reflective of a vendor-customer relationship and therefore represent performance obligations within the scope of Topic 
606. The co-exclusive license for SER-109 in the United States and Canada is considered functional intellectual property and distinct from other promises 
under  the  contract  as  Nestlé  can  benefit  from  the  license  on  its  own  or  together  with  other  readily  available  resources.  The  services  performed  by  the 
Company to obtain regulatory approval of SER-109 are not complex or specialized, could be performed by another qualified third party, are not expected to 
significantly  modify  or  customize  the  license  given  that  SER-109  is  late-stage  intellectual  property  that  has  completed  clinical  development  and  the 
services are expected to be performed over a short period of time. Therefore, the license and the services each represents a separate performance obligation 
within a contract with a customer under the scope of Topic 606 at contract inception. 

The Company considers the collaborative pre-launch activities and commercialization activities to be separate units of account within the scope of 
Topic  808  and  are  not  deliverables  under  Topic  606.  The  Company  and  Nestlé  are  both  active  participants  in  the  pre-launch  activities  and 
commercialization  activities  and  are  exposed  to  significant  risks  and  rewards  that  are  dependent  on  the  commercial  success  of  the  activities  in  the 
arrangement.

The up-front payment of $175,000 compensated the Company for: (i) the co-exclusive license for SER-109 to develop, commercialize and conduct 
medical  affairs  in  the  United  States  and  Canada,  (ii)  services  performed  in  accordance  with  the  development  and  regulatory  activity  plan  to  obtain 
regulatory approval of SER-109 in the United States and (iii) pre-launch activities performed by Nestlé and the Company until the first commercial sale of 
SER-109 in the United States. The commercialization activities, which include 

F-25

 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

the commercial manufacturing, participation on joint steering committees and medical affairs work, that occur after regulatory approval of SER-109 in the 
United States, are part of the 50/50 sharing of commercial profits. Therefore, the up-front payment of $175,000  does  not  compensate  the  Company  for 
these activities.   

The Company allocated the $175,000 between the Topic 606 unit of account and the Topic 808 unit of account by determining the standalone selling 
price  (SSP)  of  each  good  or  service.  The  selling  price  of  each  good  or  service  was  determined  based  on  the  Company’s  SSP  with  the  objective  of 
determining the price at which it would sell such an item if it were to be sold regularly on a standalone basis. The Company determined the transaction 
price under Topic 606 to be $139,500 and the Topic 808 amount to be $35,500 at the inception of the 2021 License Agreement. 

The Company determined that any variable consideration related to regulatory milestones is deemed to be fully constrained and therefore excluded 
from the transaction price due to the high degree of uncertainty and risk associated with these potential payments, as the Company determined that it could 
not assert that it was probable that a significant reversal in the amount of cumulative revenue recognized will not occur. The Company also determined that 
sales milestones relate solely to the license of intellectual property and are therefore excluded from the transaction price under the sales- or usage-based 
royalty exception of Topic 606. Revenue related to these sales milestones will only be recognized when the associated sales occur, and relevant thresholds 
are met.

The Topic 606 transaction price of $139,500 has been allocated to the co-exclusive license for SER-109 and the services performed in accordance 
with  the  development  and  regulatory  activity  plan  to  obtain  regulatory  approval  of  SER-109  in  the  United  States  based  on  the  Company’s  SSP.  The 
Company  recognizes  revenue  for  the  license  performance  obligation  at  a  point  in  time,  that  is  upon  transfer  of  the  license  to  Nestlé.  As  control  of  the 
license was transferred in July 2021, the Company recognized $131,343 of  collaboration revenue - related party during the year ended December 31, 2021 
pertaining to the license performance obligation and $2,068 relating to the services performance obligation.  

The amount allocated to the Topic 808 unit of accounting relates to the pre-launch activities performed  prior to the first commercial sale of SER-

109 and was determined to be $35,500 based on standalone selling price. 

The Company recorded the $35,500 in total liabilities on its consolidated balance sheet at the inception of the arrangement. On a quarterly basis, the 
Company and Nestlé will provide financial information about the pre-launch activities performed by both parties. The Company will reduce the $35,500  
liability as the pre-launch activities are performed and it makes payments to Nestlé for the pre-launch costs Nestlé incurs.  As of December 31, 2021, there 
is $21,098 included in accrued expenses and other current liabilities and $10,585 included in other long-term liabilities. 

The  cost  associated  with  pre-launch  activities  performed  by  the  Company  will  be  recorded  within  total  operating  expenses  in  the  Company’s 
consolidated  statements  of  operations  and  comprehensive  loss.  In  the  year  ended  December  31,  2021,  the  Company  recognized  $2,168  in  research  and 
development expenses and $3,383 in general and administrative expenses  associated with pre-launch activities performed.   

As the Company and Nestlé are both active participants in the pre-launch activities, the sharing of 50% of the pre-launch costs will be recognized in 
collaboration (profit) loss sharing - related party in the Company’s consolidated statements of operations and comprehensive loss. The Company recorded 
$1,732 of income in the collaboration (profit) loss sharing line for the year ended December 31, 2021. 

Collaboration and License Agreement with Société des Produits Nestlé S.A. (Nestlé)

Summary of Agreement

In January 2016, the Company entered into a collaboration and license agreement with Nestlé (the "2016 License Agreement") for the development 
and  commercialization  of  certain  product  candidates  in  development  for  the  treatment  and  management  of  CDI  and  IBD,  including  UC  and  Crohn’s 
disease. The 2016 License Agreement supports the development of the Company’s portfolio of products for CDI and IBD in markets outside of the United 
States  and  Canada  (the  “2016  Licensed  Territory”).  The  Company  has  retained  full  commercial  rights  to  its  entire  portfolio  of  product  candidates  with 
respect to the United States and Canada.

Under the 2016 License Agreement, the Company granted to Nestlé an exclusive, royalty-bearing license to develop and commercialize, in the 2016 
Licensed Territory, certain products based on its microbiome technology that are being developed for the treatment of CDI and IBD, including SER-109, 
SER-262, SER-287 and SER-301 (collectively, the “2016 Collaboration Products”). The 2016 License Agreement sets forth the Company’s and Nestlé’s 
respective obligations for development, commercialization, regulatory and manufacturing and supply activities for the 2016 Collaboration Products with 
respect to the licensed fields and the 2016 Licensed Territory.

F-26

 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Under  the  2016  License  Agreement,  Nestlé  agreed  to  pay  the  Company  an  upfront  cash  payment  of  $120,000,  which  the  Company  received  in 
February 2016. The Company is eligible to receive up to $285,000 in development milestone payments, $375,000  in  regulatory  payments  and  up  to  an 
aggregate of $1,125,000 for the achievement of certain commercial milestones related to the sales of 2016 Collaboration Products. Nestlé also agreed to 
pay the Company tiered royalties, at percentages ranging from the high single digits to high teens, of net sales of 2016 Collaboration Products in the 2016 
Licensed Territory.  

Under the 2016 License Agreement, the Company was entitled to receive a $20,000 milestone payment from Nestlé following initiation of a SER-
287 Phase 2 study and a $20,000 milestone payment from Nestlé following the initiation of a SER-287 Phase 3 study. In November 2018, the Company 
entered into a letter agreement with Nestlé which modified the 2016 License Agreement to address the current clinical plans for SER-287. Pursuant to the 
letter  agreement,  the  Company  and  Nestlé  agreed  that  following  initiation  of  the  SER-287  Phase  2b  study,  the  Company  would  be  entitled  to  receive 
$40,000 in milestone payments from Nestlé, which represents the milestone due to the Company for the initiation of a SER-287 Phase 2 study and a Phase 
3 study. The SER-287 Phase 2b study was initiated and the $40,000 of milestone payments were received in December 2018. The letter agreement also 
provides scenarios under which Nestlé’s reimbursement to the Company for certain Phase 3 development costs would be reduced or delayed depending on 
the outcomes of the SER-287 Phase 2b study.

The 2016 License Agreement continues in effect until terminated by either party on the following bases: (i) Nestlé may terminate the 2016 License 
Agreement  in  the  event  of  serious  safety  issues  related  to  any  of  the  2016  Collaboration  Products;  (ii)  the  Company  may  terminate  the  2016  License 
Agreement  if  Nestlé  challenges  the  validity  or  enforceability  of  any  of  the  Company’s  licensed  patents;  and  (iii)  either  party  may  terminate  the  2016 
License Agreement in the event of the other party’s uncured material breach or insolvency. Upon termination of the 2016 License Agreement, all licenses 
granted to Nestlé by the Company will terminate, and all rights in and to the 2016 Collaboration Products in the 2016 Licensed Territory will revert to the 
Company. If the Company commits a material breach of the 2016 License Agreement, Nestlé may elect not to terminate the 2016 License Agreement but 
instead apply specified adjustments to its payment obligations and other terms and conditions of the 2016 License Agreement.

Accounting Analysis

The Company assessed the 2016 License Agreement in accordance with ASC 606 and concluded that Nestlé is a customer. The Company identified 
the following promises under the contract: (i) a license to develop and commercialize the 2016 Collaboration Products in the 2016 Licensed Territory, (ii) 
obligation  to  perform  research  and  development  services,  (iii)  participation  on  a  joint  steering  committee,  and  (iv)  manufacturing  services  to  provide 
clinical supply to complete future clinical trials. In addition, the Company identified a contingent obligation to perform manufacturing services to provide 
commercial supply if commercialization occurs, which is contingent upon regulatory approval. This contingent obligation is not a performance obligation 
at inception and has been excluded from the initial allocation as it represents a separate buying decision at market rates, rather than a material right in the 
contract. The Company assessed the promised goods and services to determine if they are distinct. Based on this assessment, the Company determined that 
Nestlé  cannot  benefit  from  the  promised  goods  and  services  separately  from  the  others  as  they  are  highly  interrelated  and  therefore  not  distinct. 
Accordingly,  the  promised  goods  and  services  represent  one  combined  performance  obligation  and  the  entire  transaction  price  will  be  allocated  to  that 
single combined performance obligation. 

At contract inception, the Company determined that the $120,000 non-refundable upfront amount constituted the entirety of the consideration to be 
included in the transaction price as the development, regulatory, and commercial milestones were fully constrained. During the year ended December 31, 
2016,  the  Company  received  $10,000  from  Nestlé  in  connection  with  the  initiation  of  the  Phase  1b  study  for  SER-262  in  CDI.  During  the  year  ended 
December 31, 2017, the Company received $20,000 from Nestlé in connection with the initiation of the Phase 3 study for SER-109.  During the year ended 
December 31, 2018, the Company received $40,000 from Nestlé in connection with the initiation of the Phase 2b study for SER-287.  During the year 
ended December 31, 2020, the Company received $10,000 from Nestlé in connection with the initiation of the Phase 1b SER-301 study.  As of December 
31,  2021,  the  aggregate  amount  of  the  transaction  price  allocated  to  the  performance  obligation  of  the  2016  License  Agreement  was  approximately 
$200,000.

During  the  years  ended  December  31,  2021,  2020,  and  2019  using  the  cost-to-cost  method,  which  best  depicts  the  transfer  of  control  to  the 
customer,  the  Company  recognized  $10,446, $11,897,  and  $27,188  of  Collaboration  revenue  –  related  party,  respectively,  relating  to  the  2016  License 
Agreement.

As of December 31, 2021 and December 31, 2020, there was $103,817, and $108,174 of deferred revenue related to the unsatisfied portion of the 
performance obligation under the Nestlé agreements. As of December 31, 2021, deferred revenue is classified as current or non-current in the consolidated 
balance sheets based on the Company’s estimate of revenue that will be recognized within the next twelve months, which is determined by the cost-to-cost 
method which measures the extent of progress towards completion based on the 

F-27

 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

ratio of actual costs incurred to the total estimated costs expected upon satisfying the performance obligation. All costs associated with the 2016 License 
Agreement are recorded in research and development expense in the consolidated statements of operations and comprehensive loss.

AstraZeneca Research Collaboration and Option Agreement

Summary of the Agreement

In March 2019, the Company entered into a Research Collaboration and Option Agreement (the “Research Agreement”) with MedImmune, LLC, a 
wholly owned subsidiary of AstraZeneca Inc. (“AstraZeneca”), to advance the mechanistic understanding of the microbiome in augmenting the efficacy of 
cancer  immunotherapy.  Under  the  Research  Agreement,  the  Company  and  AstraZeneca  will  conduct  certain  research  and  development  activities  as  set 
forth on a research plan focused on the role of the microbiome in certain cancers and cancer immunotherapies, including furthering the research program 
for SER-401, in combination with AstraZeneca compounds targeting various cancers.

Pursuant  to  the  Research  Agreement,  the  Company  agreed  not  to  conduct  research  or  development  on  any  microbiome  products  specifically 
designed by the Company during the term of the Research Agreement for the treatment of cancer (“Microbiome Oncology Products”), with or on behalf of 
any third-party without the prior approval of the joint steering committee for the Research Agreement for at least three years after the effective date (the 
“Exclusivity Period”). Additionally, AstraZeneca will pay to the Company a total of $20,000 in three equal installments, the first of which the Company 
received in April 2019, the second of which the Company received in December 2019, and the third of which the Company received in January 2021. Such 
payments  are  payable  even  if  the  Research  Agreement  is  terminated  in  accordance  with  its  terms,  unless  the  Research  Agreement  is  terminated  by 
AstraZeneca for the Company’s uncured material breach. Additionally, AstraZeneca will bear its costs of conducting activities under the research plan and 
will reimburse the Company for all activities performed under the research plan based on actual full-time employee (“FTE”) time and certain third-party 
costs incurred by the Company in connection therewith.

Under the Research Agreement, the Company granted to AstraZeneca an exclusive option to negotiate a worldwide, sublicensable exclusive license 
under relevant intellectual property rights controlled by the Company to exploit Microbiome Oncology Products for the treatment of cancer. Additionally, 
the Company granted to AstraZeneca an additional exclusive option to obtain a worldwide, sublicensable, license under certain intellectual property rights 
arising out of the Agreement or coming into the control of the Company during the term of the Agreement, to exploit AstraZeneca’s oncology and other 
assets which are the subject of the research plan. AstraZeneca may exercise each option at any point prior to 90 days after the end of the Exclusivity Period 
(the  “Option  Exercise  Period”)  by  delivering  an  option  exercise  notice  to  the  Company.  If  AstraZeneca  exercises  an  option  during  the  Option  Exercise 
Period,  the  parties  will  enter  into  exclusive,  good  faith  negotiations  for  a  period  of  six  months  (the  “Negotiation  Period”)  regarding  the  terms  of  the 
definitive  license  agreement  contemplated  by  such  option.  If  no  definitive  agreement  is  reached  during  the  Negotiation  Period,  subject  to  certain  other 
terms  and  conditions  applicable  for  a  one  (1)  year  period,  the  Company  is  free  to  license,  further  develop  or  otherwise  exploit  its  assets  that  were  the 
subject of the option without further obligation to AstraZeneca.

The term of the Research Agreement continues in effect until the Research Agreement is terminated by the parties in accordance with its terms by 
mutual written agreement. Either party may terminate the Research Agreement for the other party’s uncured material breach or bankruptcy or insolvency-
related  events.  AstraZeneca  may  terminate  the  Research  Agreement  for  convenience.  In  December  2020,  the  Company  received  written  notice  from 
AstraZeneca  that  AstraZeneca  elected  to  terminate  the  Research  Agreement  by  and  in  accordance  with  its  terms.  The  termination  of  the  Research 
Agreement was effective on April 2, 2021 (the “Termination Date”), which was 120 days from the date of the termination notice.

Accounting Analysis

The  Company  assessed  the  Research  Agreement  in  accordance  with  ASC  606  and  concluded  that  AstraZeneca  is  a  customer.  The  Company 
identified  the  following  promises  under  the  contract:  (i)  a  research  license,  (ii)  an  obligation  to  perform  research  and  development  services,  and  (iii) 
participation  on  a  joint  steering  committee.      The  Company  assessed  the  promised  goods  and  services  to  determine  if  they  are  distinct.  Based  on  this 
assessment, the Company determined that AstraZeneca cannot benefit from the promised goods and services separately from the others as they are highly 
interrelated  and  therefore  not  distinct.  Accordingly,  the  promised  goods  and  services  represent  one  combined  performance  obligation  and  the  entire 
transaction price will be allocated to that single combined performance obligation.

F-28

 
 
  
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Each  exclusive  option  granted  to  AstraZeneca  provides  AstraZeneca  with  the  right  to  negotiate  a  license  agreement  in  the  future  at  fair  value. 
Therefore,  the  Company  concluded  that  each  option  does  not  constitute  a  performance  obligation  at  inception  and  has  been  excluded  from  the  initial 
allocation since each option represents a separate buying decision at market rates, rather than a material right in the contract.

At contract inception, the Company determined that the transaction price is comprised of: (i) the $20,000 fee, which represents fixed consideration, 
and  (ii)  the  estimated  reimbursement  of  research  and  development  costs  incurred,  which  represents  variable  consideration.  The  Company  included  the 
estimated reimbursement of research and development costs, approximately $13,900, in the transaction price at the inception of the arrangement because 
the Company is required to perform research and development services and the contract requires AstraZeneca to reimburse the Company for costs incurred. 
Also, since the related revenue would be recognized only as the costs are incurred, and the contract precludes the joint steering committee from changing 
the research plan without mutual agreement, the Company determined it is not probable that a significant reversal of cumulative revenue would occur.    

The Company determined that revenue under the Research Agreement should be recognized over time as AstraZeneca simultaneously receives the 
benefit  from  the  Company  as  the  Company  performs  under  the  single  performance  obligation  over  time.    The  Company  will  recognize  revenue  for  the 
single performance obligation using a cost-to-cost input method as the Company has concluded it best depicts the research and joint steering committee 
participation  services  performed  prior  to  AstraZeneca’s  ability  to  negotiate  a  license.      Under  this  method,  the  transaction  price  is  recognized  over  the 
contract’s entire performance period, using costs incurred relative to total estimated costs to determine the extent of progress towards completion.

In  December  2020,  the  Company  received  written  notice  that  AstraZeneca  elected  to  terminate  the  Research  Agreement.    As  a  result  of 
AstraZeneca’s  decision  to  terminate  the  Research  Agreement,  the  Company’s  performance  obligations  under  the  Research  Agreement  have  ended  as  of 
December 31, 2020.  The final transaction price of $23,377 is comprised of the $20,000 fixed consideration and $3,376 for the reimbursed research and 
development costs. The Company removed all costs associated with its remaining performance from the cost-to-cost model in the fourth quarter of 2020. 
This resulted in the Company recognizing the remaining deferred revenue of $15,145 to collaboration revenue in the year ended December 31, 2020.  No 
collaboration revenue was recognized for the year ended December 31, 2021, as the Company's performance obligations under the Research Agreement 
ended December 31, 2020.

Contract Balances from Contracts with Customers

The following tables present changes in the Company’s contract liabilities during the year ended December 31, 2021 and 2020:

Year ended December 31, 2021
Contract liabilities:

Deferred revenue - related party

Year ended December 31, 2020
Contract liabilities:

Deferred revenue - related party
Deferred revenue

Balance as of 
December 31, 
2020

Additions

Deductions

Balance as of 
December 31, 
2021

  $

108,174      

8,157      

(12,514 )   $

103,817  

Balance as of 
December 31, 
2019

Additions

Deductions

Balance as of 
December 31, 
2020

  $
  $

110,071      
9,668      

10,000      
7,493      

(11,897 )   $
(17,161 )   $

108,174  
-  

During the year ended December 31, 2021, the Company recognized the following revenues as a result of changes in the contract liability balances 

in the respective periods: 

Revenue recognized in the period from:
Amounts included in the contract liability at the beginning of the period

  $

10,446     $

21,565  

Year Ended December 31,

2021

2020

F-29

 
 
 
 
   
   
   
 
 
     
     
     
   
 
     
     
     
   
 
 
 
   
   
   
 
 
     
     
     
   
 
     
     
     
   
 
 
 
 
 
 
   
 
 
     
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

When consideration is received, or such consideration is unconditionally due, from a customer prior to transferring goods or services to the customer 

under the terms of a contract, a contract liability is recorded. Revenue is recognized from the contract liability over time using the cost-to-cost method.

13.

Net Loss per Share

Basic and diluted net loss per share attributable to common stockholders was calculated as follows:

2021

Year Ended December 31,
2020

2019

Numerator:

Net loss attributable to common stockholders

  $

(65,578 )   $

(89,127 )   $

(70,279 )

Denominator:

Weighted average common shares outstanding, basic and 
diluted

Net loss per share attributable to common stockholders, 
basic and diluted

  $

91,702,866      

79,789,220      

56,649,220  

(0.72 )   $

(1.12 )   $

(1.24 )

The Company’s potential dilutive securities, which include stock options, unvested restricted common stock and shares issuable under the ESPP, 
have  been  excluded  from  the  computation  of  diluted  net  loss  per  share  as  the  effect  would  be  to  reduce  the  net  loss  per  share.  Therefore,  the  weighted 
average number of common shares outstanding used to calculate both basic and diluted net loss per share attributable to common stockholders is the same. 
The following potential common shares, presented based on amounts outstanding at each period end, were excluded from the calculation of diluted net loss 
per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:

Stock options to purchase common stock
Unvested restricted stock units
Shares issuable under employee stock purchase plan

2021
11,517,189      
734,755      
165,047      
12,416,991      

Year Ended December 31,
2020
10,037,130      
6,500      
10,786      
10,054,416     

2019
8,310,683  
130,000  
89,821  
8,530,504  

14.

Commitments and Contingencies

Leases

Refer to Note 7 “Leases” for discussion of the commitments associated with the Company’s lease portfolio.

Indemnification Agreements

In the ordinary course of business, the Company may provide indemnification of varying scope and terms to vendors, lessors, business partners and 
other  parties  with  respect  to  certain  matters  including,  but  not  limited  to,  losses  arising  out  of  breach  of  such  agreements  or  from  intellectual  property 
infringement claims made by third-parties. In addition, the Company has entered into indemnification agreements with members of its board of directors 
and its officers that will require the Company, among other things, to indemnify them against certain liabilities that may arise by reason of their status or 
service as directors or officers. The maximum potential amount of future payments the Company could be required to make under these indemnification 
agreements is, in many cases, unlimited. To date, the Company has not incurred any material costs as a result of such indemnifications. The Company does 
not believe that the outcome of any claims under indemnification arrangements will have a material effect on its financial position, results of operations or 
cash flows, and it has not accrued any liabilities related to such obligations in its consolidated financial statements as of December 31, 2021 or 2020.

F-30

 
 
 
 
 
 
 
 
   
   
 
 
     
     
   
 
     
     
   
   
 
 
 
 
 
 
 
   
   
 
   
   
   
 
   
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

Legal Contingencies

The  Company  accrues  a  liability  for  legal  contingencies  when  it  believes  that  it  is  both  probable  that  a  liability  has  been  incurred  and  that  the 
Company  can  reasonably  estimate  the  amount  of  the  loss.  The  Company  reviews  these  accruals  and  adjusts  them  to  reflect  ongoing  negotiations, 
settlements,  rulings,  advice  of  legal  counsel  and  other  relevant  information.  To  the  extent  new  information  is  obtained  and  the  views  on  the  probable 
outcomes of claims, suits, assessments, investigations or legal proceedings change, changes in the Company’s accrued liabilities would be recorded in the 
period in which such determination is made.

In addition, in accordance with the relevant authoritative guidance, for any matters in which the likelihood of material loss is at least reasonably 
possible, the Company will provide disclosure of the possible loss or range of loss. If a reasonable estimate cannot be made, however, the Company will 
provide disclosure to that effect. The Company expenses legal costs as they are incurred.

The Company did not  accrue  any  liabilities  related  to  legal  contingencies  in  its  consolidated  financial  statements  as  of  December 31, 2021 and 

December 31, 2020.

Bacthera Long Term Manufacturing Agreement

On  November  8,  2021,  the  Company  entered  into  a  Long  Term  Manufacturing  Agreement  (the  “Bacthera  Agreement”)  with  BacThera  AG 
(“Bacthera”), a joint venture between Chr.  Hansen and a Lonza Group affiliate.  The Bacthera Agreement governs the general terms under which Bacthera, 
or one of its affiliates, will (i) construct a dedicated full-scale production suite for the Company at Bacthera’s Microbiome Center of Excellence in Visp, 
Switzerland, which is currently under construction; and (ii) provide manufacturing services to the Company for its SER-109 product and, if agreed by the 
parties, SER-287 product.

Under the terms of the Bacthera Agreement, the Company has agreed to pay Bacthera a total of at least 240,000 CHF (or approximately $262,000) 
for the initial term of the agreement, inclusive of the construction fees and annual operating fees. Bacthera is funding the majority of the construction costs 
and  will  own  and  control  the  manufacturing  suite  during  construction.  The  construction  fees  that  the  Company  is  responsible  for  represent  a  small 
percentage  of  the  overall  construction  costs  and  are  payable  upon  the  achievement  of  certain  milestones  related  to  the  construction  of  the  dedicated 
manufacturing suite.    The  annual  operating  fee  includes  the  cost  of  a  baseline  annual  batch  production  volume.    The  Company  has  also  agreed  to  pay 
certain other ancillary fees and a per-batch fee in excess of the baseline batches.  These fees are subject to adjustment during construction for certain items 
outside of Bacthera’s control and annually against an agreed index.  The Company will supply the active pharmaceutical ingredients to Bacthera to enable it 
to perform the services and pay for certain other raw materials and manufacturing components, which will be acquired by Bacthera.

The Bacthera Agreement has an initial term that continues until the tenth anniversary of the earlier of (a) successful completion of construction and 

demonstration of Bacthera’s readiness for commercial production or (b) the commencement of manufacturing.  

The  initial  term  is  subject  to  renewals,  which  could  extend  the  term  to  16 years, and additional three-year  terms  thereafter.    Each  party  has  the 
ability  to  terminate  the  Bacthera  Agreement  upon  the  occurrence  of  certain  customary  conditions.    The  Company  may  also  terminate  the  Bacthera 
Agreement  for  convenience  after  a  defined  period.    In  the  event  of  a  termination,  the  Company  has  certain  financial  obligations  that  would  apply,  and 
Bacthera has agreed to grant a license to Bacthera-developed manufacturing know how, if any, and provide technical assistance to the Company, so that the 
Company  could  transfer  the  manufacturing  operations  to  itself  or  a  third  party.    The  Bacthera  Agreement  also  contains  representations,  warranties  and 
indemnity obligations as well as limitations of liability that are customary for agreements of this type.  

The  Bacthera  Agreement  represents  a  lease  as  the  Company  will  have  the  right  to  use  the  dedicated  manufacturing  suite  for  a  period  of  time 
following  completion  of  the  construction  of  the  manufacturing  suite  and  approval  by  regulatory  authorities.  As  of  December  31,  2021,  the  lease 
commencement  date  has  not  occurred  and  therefore  the  Company  has  not  recorded  an  operating  lease  asset  or  an  operating  lease  liability  on  its 
consolidated balance sheet.   

15.

Income Taxes

During the years ended December 31, 2021, 2020 and 2019, the Company recorded no income tax benefits for the net operating losses incurred in 

each year or interim period, due to its uncertainty of realizing a benefit from those items.

F-31

 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

A reconciliation of the U.S. federal statutory income tax rate to the Company’s effective income tax rate is as follows:

Federal statutory income tax rate

Research and development tax credits
State taxes, net of federal benefit
Stock-based compensation
Other
Change in deferred tax asset valuation allowance

Effective income tax rate

2021

Year Ended December 31,
2020

2019

(21.0 )%    
(16.6 )
(2.8 )
(0.4 )
0.4  
40.4  

— %    

(21.0 )%    
(6.4 )
(7.8 )
(5.8 )
0.2  
40.8  

— %    

(21.0 )%
(5.8 )
(6.8 )
(1.7 )
(0.7 )
36.0  

— %

Net deferred tax assets as of December 31, 2021 and 2020 consisted of the following:

Deferred tax assets:

Net operating loss carryforwards
Research and development tax credit carryforwards
Capitalized organization costs
Stock-based compensation expense
Lease Liability
Charitable Contributions
Deferred Revenue
Accrued expenses
Capitalized research and development expenses
Section 163(j) limitation
Depreciation and amortization
Total deferred tax assets

Deferred tax liabilities:

Depreciation and amortization
Right of use assets

Total deferred tax liabilities

Valuation allowance

Net deferred tax assets

December 31,

2021

2020

108,189     $
53,133      
181      
16,045      
6,635      
50      
36,666      
2,475      
43      
1,368      
247      
225,032     $

—      
(4,918 )    
(4,918 )    
(220,114 )   $
—     $

106,351  
42,311  
214  
11,615  
4,283  
15  
29,553  
1,783  
51  
540  
—  
196,716  

(510 )
(2,470 )
(2,980 )
(193,736 )
—  

  $

  $

  $
  $

As of December 31, 2021, the Company had net operating loss carryforwards (“NOLs”) for federal and state income tax purposes of $402,500 and 
$394,100, respectively. Federal NOLs of $119,800, generated before 2018, will begin expiring in varying amounts in 2035 unless utilized. The remaining 
federal NOLs of $282,700, generated after 2017, will be carried forward indefinitely and could be used to offset up to 80% of taxable income in future tax 
years.  Massachusetts does not follow federal time periods for NOLs and as such the Company’s Massachusetts NOLs of $394,100 will expire at various 
times starting in 2035.  As of December 31, 2021, the Company also had available research and development tax credit carryforwards for federal and state 
income tax purposes of $43,700 and $11,900, respectively, which begin to expire in 2031 and 2028, respectively. The federal research and development tax 
credits include an orphan drug credit carryforward of $23,700.  

Utilization of the NOLs and research and development tax credit carryforwards may be subject to a substantial annual limitation under Sections 382 
and 383 of the Internal Revenue Code of 1986 due to ownership changes that have occurred previously or that could occur in the future. These ownership 
changes may limit the amount of carryforwards that can be utilized annually to offset future taxable income. In general, an ownership change, as defined by 
Section 382, results from transactions increasing the ownership of certain shareholders or public groups in the stock of a corporation by more than 50% 
over a three-year period. Since its formation, the Company has raised capital through the issuance of capital stock on several occasions. These financings, 
combined with the purchasing shareholders' subsequent disposition of those shares, may have resulted in a change of control or could result in a change of 
control in the future upon subsequent disposition. The Company conducted an analysis to determine if historical changes in ownership through December 
31, 2020 would limit or otherwise restrict its ability to utilize these NOLs and research and development credit carryforwards. As a result of this analysis, 
the Company does not believe there are any significant limitations on its ability to utilize these carryforwards. 

F-32

 
 
 
 
 
 
 
 
 
 
 
 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
 
 
 
 
 
 
 
   
 
 
     
   
   
   
   
   
   
   
   
   
   
   
 
     
   
   
   
   
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

However, future changes in ownership after December 31, 2020 could affect the limitation in future years. Any limitation may result in expiration of a 
portion of the NOLs or research and development credit carryforwards before utilization.

The  Company  has  evaluated  the  positive  and  negative  evidence  bearing  upon  its  ability  to  realize  the  deferred  tax  assets.  Management  has 
considered the Company’s history of cumulative net losses incurred since inception and its lack of commercialization of any products or generation of any 
revenue from product sales since inception and has concluded that it is more likely than not that the Company will not realize the benefits of the deferred 
tax assets. Accordingly, a full valuation allowance has been established against the deferred tax assets as of December 31, 2021 and 2020. Management 
reevaluates the positive and negative evidence at each reporting period.

Changes  in  the  valuation  allowance  for  deferred  tax  assets  during  the  years  ended  December  31,  2021,  2020  and  2019  related  primarily  to  the 

increases in NOLs, research and development tax credit carryforwards, and stock-based compensation were as follows:

Valuation allowance at beginning of year

Decreases recorded as benefit to income tax provision
Increases recorded to income tax provision

Valuation allowance as of end of year

  $

  $

2021

Year Ended December 31,
2020
(157,346 )   $
—      
(36,390 )    
(193,736 )   $

(193,736 )   $
—      
(26,378 )    
(220,114 )   $

2019
(132,009 )
—  
(25,337 )
(157,346 )

The Company had no unrecognized tax benefits or related interest and penalties accrued for the years ended December 31, 2021 and 2020.  The 

Company will recognize interest and penalties related to uncertain tax positions in income tax expense.  

The Company files tax returns as prescribed by the tax laws of the jurisdictions in which it operates.  In the normal course of business, the Company 
is subject to examination by federal and state jurisdictions, where applicable. The Company is currently under examination by the Internal Revenue Service 
("IRS") for the period ended December 31, 2018 related to its R&D tax credits. The Company's tax years are still open under statute from 2011 to present. 
All years may be examined to the extent the tax credit or net operating loss carryforwards are used in future periods.       

16.

Related Party Transactions

As described in Note 12, in July 2021, the Company entered into the 2021 License Agreement with NHSc Pharma Partners (together with Société 
des Produits Nestlé S.A., “Nestlé”). NHSc Pharma Partners is an affiliate of two of the Company's significant stockholders, Société des Produits Nestlé 
S.A. and Nestlé Health Science U.S. Holdings, Inc. During the year ended December 31, 2021, the Company recognized $133,411 of related party revenue 
associated with the 2021 License Agreement. As of the year ended December 31, 2021, there was $6,089 of deferred revenue related to the 2021 License 
Agreement,  which  is  classified  as  current  or  non-current  in  the  consolidated  balance  sheets.  As  of  December  31,  2021  there  was  $21,098  included  in 
accrued expenses and other liabilities and $10,585 included in other long term liabilities related to the 2021 License Agreement. The Company has made 
no payments to Nestlé during the year ended December 31, 2021. There was no amount due from Nestlé as of December 31, 2021.

As described in Note 12, in January 2016, the Company entered into the 2016 License Agreement with Société des Produits Nestlé S.A. (successor 
in interest to Nestec, Ltd.) for the development and commercialization of certain product candidates in development for the treatment and management of 
CDI and IBD, including UC and Crohn’s disease. Société des Produits Nestlé S.A. and its affiliate Nestlé Health Science U.S. Holdings, Inc. are two of the 
Company's significant stockholders. During the years ended December 31, 2021, 2020, and 2019, the Company recognized $10,446, $11,897, and $27,188, 
respectively, of related party revenue associated with the 2016 License Agreement. As of December 31, 2021 and 2020, there was $97,728 and $108,174, 
respectively, of deferred revenue related to the 2016 License Agreement, which is classified as current or non-current in the consolidated balance sheets. 
The Company has made no payments to Nestlé during the year ended December 31, 2021. There was no amount due from Nestlé as of December 31, 2021.

In July 2019, the Company entered into a sublease agreement with Flagship Pioneering, one of the Company’s significant stockholders, to sublease 
a portion of its office and laboratory space in Cambridge, Massachusetts. The term of the sublease agreement commenced in July 2019 and ends on the last 
day  of  the  24th  calendar  month  following  commencement,  with  no  option  to  extend  (see  Note  7).  Under  this  agreement,  the  Company  recorded  other 
income of $1,575 and $1,813 during the year ended December 31, 2021 and 2020. The Company received cash payments of $1,575 and $1,813 during the 
year ended December 31, 2021 and 2020.

F-33

 
 
 
 
 
 
 
   
   
 
   
   
 
 
 
SERES THERAPEUTICS, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(amounts in thousands, except share and per share data)

17.

401(k) Savings Plan

The  Company  has  a  defined  contribution  savings  plan  under  Section  401(k)  of  the  Internal  Revenue  Code.  This  plan  covers  substantially  all 
employees who meet minimum age and service requirements and allows participants to defer a portion of their annual compensation on a pre-tax basis. 
Effective January 1, 2016, the Company elected to match 50% of the first 6% of an employee’s deferral. Company contributions are expensed in the year 
for  which  they  are  declared.  During  the  years  ended  December  31,  2021,  2020,  and  2019  the  Company  recorded  expense  of  $1,087,  $586,  and  $542, 
respectively, for 401(k) match contributions.

18.

Subsequent Events

Second Amendment to Loan and Security Agreement with Hercules

Effective as of February 24, 2022 (the “Effective Date”), the Company entered into a Second Amendment to Loan and Security Agreement (the 
“Second  Amendment”),  with  the  lenders  party  thereto  (the  “Lenders”),  and  Hercules  Capital,  Inc.,  in  its  capacity  as  the  administrative  agent  and  the 
collateral  agent  for  the  Lenders,  which  amended  the  Original  Credit  Facility.  Under  the  Original  Credit  Facility,  term  loans  in  an  aggregate  principal 
amount of up to $50,000 were available to the Company, of which $25,000 (the “first tranche”) has been advanced to the Company and approximately 
$22,100 were outstanding immediately prior to the Effective Date. Pursuant to the Second Amendment, term loans in an aggregate principal amount of up 
to $100,000 (the “New Credit Facility”) have become available to the Company in five tranches including the first tranche, subject to certain terms and 
conditions.

The first tranche in an aggregate principal amount of $25,000 is outstanding as of the Effective Date, after taking into account reborrowing by the 
Company on the Effective Date of a previously-repaid principal amount of approximately $2,900. The second tranche in an aggregate principal amount of 
$12,500 and the third tranche in an aggregate principal amount of $12,500 have been advanced to the Company and are outstanding as of the Effective 
Date. The fourth tranche in an aggregate principal amount of $25,000 is available upon satisfaction of certain conditions, including the approval by the U.S. 
Food and Drug Administration of a biologics license application in respect of SER-109 (the "Regulatory Approval Milestone") by no later than December 
15,  2023.  The  fifth  tranche  in  an  aggregate  principal  amount  of  up  to  $25,000  is  available  through  the  Amortization  Date  (as  defined  below)  upon 
satisfaction of certain conditions, including the Lenders’ investment committee approval. 

All advances outstanding under the New Credit Facility will bear interest at a rate equal to the greater of either (i) the Prime Rate (as reported in The 
Wall  Street  Journal)  plus  6.40%,  and  (ii)  9.65%.  For  all  advances  outstanding  under  the  New  Credit  Facility,  the  Company  will  make  interest  only 
payments through December 31, 2023, extendable to December 31, 2024 upon satisfaction of certain conditions (such applicable date, the “Amortization 
Date”). The principal balance and interest of the advances will be repaid in equal monthly installments after the Amortization Date and continuing through 
October 1, 2024, extendable to October 1, 2025, upon satisfaction of certain conditions (such applicable date, the “Maturity Date”). 

The Company may prepay advances under the New Credit Facility, in whole or in part, at any time subject to a prepayment charge equal to: (a) 2.0% 
of amounts so prepaid, if such prepayment occurs during the first year following the Effective Date; (b) 1.5% of the amount so prepaid, if such prepayment 
occurs  during  the  second  year  following  the  Effective  Date,  and  (c)  1.0%  of  the  amount  so  prepaid,  if  such  prepayment  occurs  during  the  third  year 
following the Effective Date. 

The Company will pay an end of term charge of 4.85% of the aggregate amount of the advances made under the Old Credit Facility on the earliest 
date  of  (i)  November  1,  2023;  (ii)  the  date  that  the  Company  prepays  all  of  the  outstanding  principal  in  full,  or  (iii)  the  date  the  loan  payments  are 
accelerated due to an event of default. The Company will pay an additional end of term charge of 1.75% of the aggregate amount of the advances under the 
New Credit Facility (including the first tranche of $25,000) on the earliest date of (i) the Maturity Date; (ii) the date that the Company prepays all of the 
outstanding principal in full, or (iii) the date the loan payments are accelerated due to an event of default.

Other terms of the New Credit Facility remain generally identical to those under the Old Credit Facility, with certain covenants amended by the 
Second Amendment to provide the Company with additional operational flexibility, including the ability for the Company to issue up to $350.0 million in 
convertible  notes.  The  New  Credit  Facility  includes  a  conditional  liquidity  covenant  commencing  on  June  15,  2023,  which  ceases  to  apply  if  certain 
conditions are satisfied. 

F-34

 
 
EMPLOYMENT AGREEMENT

Exhibit 10.16

This  Employment  Agreement  (this  “Agreement”),  dated  as  of  January  5,  2022,  is  made  by  and  between  Seres 
Therapeutics,  Inc.,  a  Delaware  corporation  (together  with  any  successor  thereto,  the  “Company”),  and  Paula  Cloghessy 
(“Executive”) (collectively referred to as the “Parties” or individually referred to as a “Party”).  

RECITALS

A. 

It is the desire of the Company to assure itself of the services of Executive by entering into this Agreement.

B.  Executive  and  the  Company  mutually  desire  that  Executive  be  employed  by  the  Company  on  the  terms  herein  provided,  
commencing  on  February  7,  2022  or  another  date  mutually  agreed  by  the  Parties  (the  date  Executive  actually 
commences such employment, the “Effective Date”).

C.  This Agreement will become effective upon the Effective Date.

AGREEMENT

NOW, THEREFORE, in consideration of the foregoing and of the respective covenants and agreements set forth below, 

the Parties hereto agree as follows:

1.Employment.

(a)

General.  Effective as of the Effective Date, the Company shall employ Executive and Executive shall remain in 
the  employ  of  the  Company,  for  the  period  and  in  the  positions  set  forth  in  this  Section 1,  and  subject  to  the  other  terms  and 
conditions herein provided. 

(b)

At-Will  Employment.    The  Company  and  Executive  acknowledge  that  Executive’s  employment  is  and  shall 
continue to be at-will, as defined under applicable law, and that Executive’s employment with the Company may be terminated 
by either Party at any time for any or no reason (subject to the notice requirements of Section 3(b)).    This  “at-will”  nature  of 
Executive’s employment shall remain unchanged during Executive’s tenure as an employee and may not be changed, except in an 
express writing signed by Executive and a duly authorized officer of the Company.  If Executive’s employment terminates for 
any reason, Executive shall not be entitled to any payments, benefits, damages, award or compensation other than as provided in 
this Agreement or otherwise agreed to in writing by the Company or as provided by applicable law.  The term of this Agreement 
(the “Term”) shall commence on the Effective Date and end on the date this Agreement is terminated under Section 3.

(c)

Positions and Duties.  During the Term, Executive shall serve as Executive Vice President, Chief People Officer 
of  the  Company,  initially  reporting  directly  to  the  Chief  Executive  Officer  of  the  Company  (the  “CEO”)  with  such 
responsibilities,  duties  and  authority  normally  associated  with  such  positions  and  as  may  from  time  to  time  be  assigned  to 
Executive, or altered, 

1

 
by the CEO.  Executive shall devote substantially all of Executive’s working time and efforts to the business and affairs of the 
Company (which shall include service to its affiliates, if applicable) and shall not engage in outside business activities (including 
serving  on  outside  boards  or  committees)  without  the  consent  of  the  CEO,  provided  that  Executive  shall  be  permitted  to  (i) 
manage  Executive’s  personal,  financial  and  legal  affairs,  (ii)  participate  in  trade  associations  and  (iii)  serve  on  the  board  of 
directors of not-for-profit or tax-exempt charitable organizations, in each case, subject to compliance with this Agreement and 
provided that such activities do not materially interfere with Executive’s performance of Executive’s duties and responsibilities 
hereunder.  Executive agrees to observe and comply with the rules and policies of the Company as adopted by the Company from 
time to time, in each case as amended from time to time, as set forth in writing, and as delivered or made available to Executive 
(each, a “Policy”).

2.Compensation and Related Matters.

(a)

Annual Base Salary.  During the Term, Executive shall receive a base salary at a rate of $375,000 per annum, 
which shall be paid in accordance with the customary payroll practices of the Company and shall be pro-rated for partial years of 
employment.  Such annual base salary shall be reviewed (and may be adjusted) from time to time by the Board of Directors of the 
Company or an authorized committee of the Board (in either case, the “Board,” and such annual base salary, as it may be adjusted 
from time to time, the “Annual Base Salary”).

(b)

Bonus.  During the Term, Executive will be eligible to participate in an annual incentive program established by 
the Board.  Executive’s annual incentive compensation under such incentive program (the “Annual Bonus”) shall be targeted at 
40% of Executive’s Annual Base Salary (such target, as may be adjusted by the Board from time to time, the “Target Bonus”).  
The  Annual  Bonus  payable  under  the  incentive  program  shall  be  based  on  the  achievement  of  performance  goals  to  be 
determined by the Board and may be pro-rated for any partial year of employment.  The payment of any Annual Bonus pursuant 
to the incentive program shall be subject to Executive’s continued employment with the Company through the date of payment, 
except as otherwise provided in Section 4(b).

(c)

Benefits.  During the Term, Executive shall be eligible to participate in employee benefit plans, programs and 
arrangements  of  the  Company  (including  medical,  dental  and  401(k)  plans),  subject  to  the  terms  and  eligibility  requirements 
thereof  and  as  such  plans,  programs  and  arrangements  may  be  amended  or  in  effect  from  time  to  time.    In  no  event  shall 
Executive  be  eligible  to  participate  in  any  severance  plan  or  program  of  the  Company,  except  as  set  forth  in  Section 4  of  this 
Agreement.

(d)

Vacation.  During the Term, Executive shall be entitled to paid personal leave in accordance with the Company’s 

Policies.  Any vacation shall be taken at the reasonable and mutual convenience of the Company and Executive. 

(e)

Business  Expenses.    During  the  Term,  the  Company  shall  reimburse  Executive  for  all  reasonable  travel  and 
other business expenses incurred by Executive in the performance of Executive’s duties to the Company in accordance with the 
Company’s expense reimbursement Policy.

2

 
(f)

Key  Person  Insurance.    At  any  time  during  the  Term,  the  Company  shall  have  the  right  to  insure  the  life  of 
Executive for the Company’s sole benefit.  The Company shall have the right to determine the amount of insurance and the type 
of  policy.    Executive  shall  reasonably  cooperate  with  the  Company  in  obtaining  such  insurance  by  submitting  to  physical 
examinations,  by  supplying  all  information  reasonably  required  by  any  insurance  carrier,  and  by  executing  all  necessary 
documents  reasonably  required  by  any  insurance  carrier,  provided  that  any  information  provided  to  an  insurance  company  or 
broker  shall  not  be  provided  to  the  Company  without  the  prior  written  authorization  of  Executive.    Executive  shall  incur  no 
financial obligation by executing any required document, and shall have no interest in any such policy.

(g)

Equity.  Subject to approval by the Board, the Company will grant Executive an option (the “Option”) under the 
Company’s  2015  Incentive  Award  Plan  (the  “Plan”)  to  purchase  190,000  shares  of  the  Company’s  common  stock  (subject  to 
adjustment for corporate events as set forth in the Plan) at an exercise price per share equal to the per share fair market value of 
the Company’s common stock on the date of grant, as determined in accordance with the Plan.  The Option will vest as to 25% of 
the shares subject to the Option on the first anniversary of the Effective Date and as to an additional 6.25% of such shares upon 
Executive’s completing each three months of continuous service to the Company thereafter.  In all respects, the Option will be 
governed by and subject to the terms of the Plan and a separate stock option agreement to be entered into between Executive and 
the Company.  

3.Termination.

Executive’s  employment  hereunder  and  the  Term  may  be  terminated  by  the  Company  or  Executive,  as  applicable, 

without any breach of this Agreement under the following circumstances and the Term will end on the Date of Termination:

(a)

Circumstances.

(i)

(ii)

Death.  Executive’s employment hereunder shall terminate upon Executive’s death.

Disability.    If  Executive  has  incurred  a  Disability,  as  defined  below,  the  Company  may  terminate 

Executive’s employment.

(iii)

Termination for Cause.  The Company may terminate Executive’s employment for Cause, as defined 

below.

(iv)

(v)

Termination without Cause.  The Company may terminate Executive’s employment without Cause.

Resignation from the Company for Good Reason.  Executive may resign Executive’s employment with 

the Company for Good Reason, as defined below.

(vi)

Resignation from the Company Without Good Reason.  Executive may resign Executive’s employment 

with the Company for any reason other than Good Reason or for no reason.

3

 
(b)

Notice of Termination.    Any  termination  of  Executive’s  employment  by  the  Company  or  by  Executive  under 
this Section 3 (other than termination pursuant to paragraph (a)(i)) shall be communicated by a written notice to the other Party 
hereto  (i)  indicating  the  specific  termination  provision  in  this  Agreement  relied  upon,  (ii)  setting  forth  in  reasonable  detail  the 
facts and circumstances claimed to provide a basis for termination of Executive’s employment under the provision so indicated, if 
applicable,  and  (iii)  specifying  a  Date  of  Termination  which,  if  submitted  by  Executive,  shall  be  at  least  forty-five  (45)  days 
following  the  date  of  such  notice  (a  “Notice  of  Termination”);  provided,  however,  that  in  the  event  that  Executive  delivers  a 
Notice of Termination to the Company, the Company may, in its sole discretion, change the Date of Termination to any date that 
occurs following the date of the Company’s receipt of such Notice of Termination and is prior to the date specified in such Notice 
of Termination but the termination will still be considered a resignation by Executive.  A Notice of Termination submitted by the 
Company may provide for a Date of Termination on the date Executive receives the Notice of Termination, or any date thereafter 
elected by the Company in its sole discretion.  The failure by the Company to set forth in the Notice of Termination any fact or 
circumstance  which  contributes  to  a  showing  of  Cause  shall  not  waive  any  right  of  the  Company  hereunder  or  preclude  the 
Company from asserting such fact or circumstance in enforcing the Company’s rights hereunder.  

(c)

Company Obligations upon Termination.  Upon termination of Executive’s employment pursuant to any of the 
circumstances listed in this Section 3, Executive (or Executive’s estate) shall be entitled to receive the sum of:  (i) the portion of 
Executive’s  Annual  Base  Salary  earned  through  the  Date  of  Termination,  but  not  yet  paid  to  Executive;  (ii)  any  expense 
reimbursements  owed  to  Executive  pursuant  to  Section  2(e);  and  (iii)  any  amount  accrued  and  arising  from  Executive’s 
participation  in,  or  benefits  accrued  under  any  employee  benefit  plans,  programs  or  arrangements,  which  amounts  shall  be 
payable in accordance with the terms and conditions of such employee benefit plans, programs or arrangements (collectively, the 
“Company Arrangements”).  Except as otherwise expressly required by law (e.g., COBRA) or as specifically provided herein, all 
of Executive’s rights to salary, severance, benefits, bonuses and other compensatory amounts hereunder (if any) shall cease upon 
the termination of Executive’s employment hereunder.  In the event that Executive’s employment is terminated by the Company 
for any reason, Executive’s sole and exclusive remedy shall be to receive the payments and benefits described in this Section 3(c) 
or Section 4, as applicable.

(d)

Deemed Resignation.  Upon termination of Executive’s employment for any reason, Executive shall be deemed 

to have resigned from all offices and directorships, if any, then held with the Company or any of its subsidiaries.

4.Severance Payments.

(a)

Termination for Cause, or Termination Upon Death, Disability or Resignation from the Company Without Good 
Reason.    If  Executive’s  employment  shall  terminate  as  a  result  of  Executive’s  death  pursuant  to  Section  3(a)(i)  or  Disability 
pursuant to Section 3(a)(ii),  pursuant  to  Section 3(a)(iii)  for  Cause,  or  pursuant  to  Section  3(a)(vi)  for  Executive’s  resignation 
from the 

4

 
Company without Good Reason, then Executive shall not be entitled to any severance payments or benefits, except as provided in 
Section 3(c).

(b)

Termination without Cause, or Resignation from the Company for Good Reason.  If Executive’s employment 
terminates  without  Cause  pursuant  to  Section 3(a)(iv),  or  pursuant  to  Section  3(a)(v)  due  to  Executive’s  resignation  for  Good 
Reason, then, except as otherwise provided by Section 4(c) and subject to Executive signing on or before the 21st day following 
Executive’s Separation from Service (as defined below), and not revoking, a release of claims substantially in the form attached 
as Exhibit A to this Agreement (the “Release”), and Executive’s continued compliance with Section 5, Executive shall receive, in 
addition to payments and benefits set forth in Section 3(c), the following:

(i)

an amount in cash equal to the product of (x) 1.0 times (y) the Annual Base Salary, payable in the form 
of  salary  continuation  in  regular  installments  over  the  12-month  period  following  the  date  of  Executive’s  Separation 
from Service (the “Severance Period”) in accordance with the Company’s normal payroll practices; 

(ii)

to  the  extent  unpaid  as  of  the  Date  of  Termination,  an  amount  of  cash  equal  to  any  Annual  Bonus 
earned by Executive for the Company’s fiscal year prior to the fiscal year in which the Date of Termination occurs, as 
determined by the Board in its discretion based upon actual performance achieved, which Annual Bonus, if any, shall be 
paid to Executive in the fiscal year in which the Date of Termination occurs when bonuses for such prior fiscal year are 
paid in the ordinary course to actively employed senior executives of the Company; and

(iii)

if Executive timely elects to receive continued medical, dental or vision coverage under one or more of 
the  Company’s  group  healthcare  plans  pursuant  to  the  Consolidated  Omnibus  Budget  Reconciliation  Act  of  1985,  as 
amended  (“COBRA”),  then  the  Company  shall  directly  pay,  or  reimburse  Executive  for,  the  COBRA  premiums  for 
Executive  and  Executive’s  covered  dependents  under  such  plans  during  the  period  commencing  on  Executive’s 
Separation  from  Service  and  ending  upon  the  earliest  of  (X)  the  last  day  of  the  Severance  Period,  (Y)  the  date  that 
Executive  and/or  Executive’s  covered  dependents  become  no  longer  eligible  for  COBRA  or  (Z)  the  date  Executive 
becomes eligible to receive healthcare coverage from a subsequent employer (and Executive agrees to promptly notify 
the Company of such eligibility).  Notwithstanding the foregoing, if the Company determines in its sole discretion that it 
cannot provide the foregoing benefit without potentially violating applicable law (including, without limitation, Section 
2716 of the Public Health Service Act) or incurring an excise tax, the Company shall in lieu thereof provide to Executive 
a taxable monthly payment in an amount equal to the monthly COBRA premium that Executive would be required to 
pay  to  continue  Executive’s  and  Executive’s  covered  dependents’  group  health  coverage  in  effect  on  the  Date  of 
Termination (which amount shall be based on the premium for the first month of COBRA coverage), which payments 
shall be made regardless of whether Executive elects COBRA continuation coverage and shall commence in the month 
following  the  month  in  which  the  Date  of  Termination  occurs  and  shall  end  on  the  earlier  of  (X)  the  last  day  of  the 
Severance  Period,  (Y)  the  date  that  Executive  and/or  Executive’s  covered  dependents  become  no  longer  eligible  for 
COBRA or (Z) the date Executive becomes eligible to receive healthcare 

5

 
coverage from a subsequent employer (and Executive agrees to promptly notify the Company of such eligibility).

(c)

Change  in  Control.    In  lieu  of  the  payments  and  benefits  set  forth  in  Section  4(b),  in  the  event  Executive’s 
employment terminates without Cause pursuant to Section 3(a)(iv), or pursuant to Section 3(a)(v) due to Executive’s resignation 
for  Good  Reason,  in  either  case,  within  60  days  prior  to  or  12  months  following  the  date  of  a  Change  in  Control,  subject  to 
Executive signing on or before the 21st day following Executive’s Separation from Service, and not revoking, the Release, and 
Executive’s continued compliance with Section 5, Executive shall receive the following: 

(i)

(ii)

without duplication, the payments and benefits described in Section 4(b); 

an amount in cash equal to the product of (x) 1.0 times (y) the Target Bonus, payable in a lump sum 

within thirty (30) days following the later of Executive’s Separation from Service and the date of a Change in Control; 
and 

(iii)

all unvested equity or equity-based awards held by Executive under any Company equity compensation 

plans that vest solely based on the passage of time shall immediately become 100% vested (and if the Date of 
Termination precedes the Change in Control, all such unvested awards shall remain outstanding and eligible to vest in 
accordance with this Section 4(c)(iii) if a Change Control occurs within 60 days after the Date of Termination, provided 
that in no event will any such award remain outstanding beyond the final expiration date of the award set forth in the 
documents governing such award), with any other equity or equity-based awards (including awards that vest in whole or 
in part based on the attainment of performance-vesting conditions) being governed by the terms of the applicable award 
agreement.

(d)

Survival.  Notwithstanding anything to the contrary in this Agreement, the provisions of Sections 5 through 9 

will survive the termination of Executive’s employment and the termination of the Term.

5.Restrictive  Covenants.    As  a  condition  to  the  effectiveness  of  this  Agreement,  Executive  will  execute  and  deliver  to  the 
Company  no  later  than  the  Effective  Date  the  Employee  Non-Competition,  Non-Solicitation,  Confidentiality  and  Assignment 
Agreement  attached  as  Exhibit  B  (the  “Proprietary  Information  Agreement”).    Executive  agrees  to  abide  by  the  terms  of  the 
Proprietary Information Agreement, which are hereby incorporated by reference into this Agreement.  Executive acknowledges 
that  the  provisions  of  the  Proprietary  Information  Agreement  will  survive  the  termination  of  Executive’s  employment  and  the 
termination of the Term for the periods set forth in the Proprietary Information Agreement.

6.Assignment and Successors.

The Company may assign its rights and obligations under this Agreement to any of its affiliates or to any successor to all 
or  substantially  all  of  the  business  or  the  assets  of  the  Company  (by  merger  or  otherwise),  and  may  assign  or  encumber  this 
Agreement  and  its  rights  hereunder  as  security  for  indebtedness  of  the  Company  and  its  affiliates.    This  Agreement  shall  be 
binding upon 

6

 
and inure to the benefit of the Company, Executive and their respective successors, assigns, personal and legal representatives, 
executors, administrators, heirs, distributees, devisees, and legatees, as applicable.  None of Executive’s rights or obligations may 
be assigned or transferred by Executive, other than Executive’s rights to payments hereunder, which may be transferred only by 
will or operation of law.  Notwithstanding the foregoing, Executive shall be entitled, to the extent permitted under applicable law 
and applicable Company Arrangements, to select and change a beneficiary or beneficiaries to receive compensation hereunder 
following Executive’s death by giving written notice thereof to the Company.  

7.Certain Definitions.

(a)

Cause.  The Company shall have “Cause” to terminate Executive’s employment hereunder upon:

(i)

Executive’s refusal to (A) substantially perform Executive’s duties with the Company (other than any 
such failure resulting from Executive’s Disability) or (B) comply with, in any material respect, any of the Company’s 
Policies; 

(ii)

the Board’s determination that Executive refused in any material respect to carry out or comply with 

any lawful and reasonable directive of the Board;

(iii)

(iv)

Executive’s material breach of a material provision of this Agreement;

Executive’s  conviction,  plea  of  no  contest,  plea  of  nolo  contendere,  or  imposition  of  unadjudicated 

probation for any felony or crime involving moral turpitude; 

(v)

Executive’s  unlawful  use  (including  being  under  the  influence)  or  possession  of  illegal  drugs  on  the 
Company’s  (or  any  of  its  affiliate’s)  premises  or  while  performing  Executive’s  duties  and  responsibilities  under  this 
Agreement; or

(vi)

Executive’s  commission  of  an  act  of  fraud,  embezzlement,  misappropriation,  willful  misconduct,  or 

breach of fiduciary duty against the Company or any of its affiliates;

provided, however, that Executive’s termination will not be considered for Cause unless and until (a) the Company has provided 
Executive, within 60 days of the Company’s knowledge of the occurrence of the facts and circumstances underlying the Cause 
event, written notice stating with reasonable specificity the applicable facts and circumstances underlying such finding of Cause 
and  (b)  in  the  case  of  alleged  Cause  under  clause  (i),  (ii)  or  (iii)  of  the  foregoing  definition  and  to  the  extent  the  applicable 
condition or event is reasonably capable of being cured, Executive shall have failed to cure such condition or event within 30 
days after the receipt of such notice. 

(b)

Change  in  Control.    “Change  in  Control”  shall  have  the  meaning  set  forth  in  the  version  of  the  Seres 

Therapeutics, Inc. 2015 Incentive Award Plan in effect on the Effective Date. 

(c)

Code.  “Code” shall mean the Internal Revenue Code of 1986, as amended, and the regulations and guidance 

promulgated thereunder.

7

 
(d)

Date  of  Termination.    “Date  of  Termination”  shall  mean  (i)  if  Executive’s  employment  is  terminated  by 
Executive’s death, the date of Executive’s death; or (ii) if Executive’s employment is terminated pursuant to Section 3(a)(ii) – (vi) 
either the date indicated in the Notice of Termination or the date specified by the Company pursuant to Section 3(b), whichever is 
earlier.

(e)

Disability.    “Disability”  shall  mean,  at  any  time  the  Company  or  any  of  its  affiliates  sponsors  a  long-term 
disability  plan  for  the  Company’s  employees,  “disability”  as  defined  in  such  long-term  disability  plan  for  the  purpose  of 
determining  a  participant’s  eligibility  for  benefits,  provided,  however,  if  the  long-term  disability  plan  contains  multiple 
definitions  of  disability,  “Disability”  shall  refer  to  that  definition  of  disability  which,  if  Executive  qualified  for  such  disability 
benefits, would provide coverage for the longest period of time. The determination of whether Executive has a Disability shall be 
made by the person or persons required to make disability determinations under the long-term disability plan.  At any time the 
Company does not sponsor a long-term disability plan for its employees, “Disability” shall mean Executive’s inability to perform, 
with or without reasonable accommodation, the essential functions of Executive’s positions hereunder for a total of three months 
during any six-month period as a result of incapacity due to mental or physical illness as determined by a physician selected by 
the  Company  or  its  insurers  and  acceptable  to  Executive  or  Executive’s  legal  representative,  with  such  agreement  as  to 
acceptability not to be unreasonably withheld or delayed.  Any refusal by Executive to submit to a medical examination for the 
purpose of determining Disability shall be deemed to constitute conclusive evidence of Executive’s Disability. 

(f)

Good  Reason.    For  the  sole  purpose  of  determining  Executive’s  right  to  severance  payments  and  benefits  as 
described  above,  Executive’s  resignation  will  be  for  “Good  Reason”  if  Executive  resigns  within  ninety  days  after  any  of  the 
following events, unless Executive consents to the applicable event:  (i) a material decrease in Executive’s Annual Base Salary, 
(ii) a material decrease in Executive’s authority or areas of responsibility as are commensurate with Executive’s title or positions, 
including Executive ceasing to report directly to the chief executive officer of the Company’s ultimate parent company following 
a  Change  in  Control  (or  of  the  Company  if  there  is  no  such  parent  entity),  (iii)  the  Company’s  material  breach  of  a  material 
provision of this Agreement or another written agreement with Executive or (iv) the relocation of Executive’s primary office to a 
location  more  than  50  miles  from  the  Boston  metropolitan  area.    Notwithstanding  the  foregoing,  no  Good  Reason  will  have 
occurred unless and until Executive has:  (a) provided the Company, within 60 days of Executive’s knowledge of the occurrence 
of the facts and circumstances underlying the Good Reason event, written notice stating with reasonable specificity the applicable 
facts  and  circumstances  underlying  such  finding  of  Good  Reason;  (b)  provided  the  Company  with  an  opportunity  to  cure  the 
same within 30 days after the receipt of such notice; and (c) the Company shall have failed to cure such condition within such 30 
day period.

8.Parachute Payments.

(a)

Notwithstanding any other provisions of this Agreement or any Company equity plan or agreement, in the event 
that  any  payment  or  benefit  by  the  Company  or  otherwise  to  or  for  the  benefit  of  Executive,  whether  paid  or  payable  or 
distributed or distributable pursuant to the terms of this Agreement or otherwise (all such payments and benefits, including the 
payments and benefits under Section 4(b) and Section 4(c) hereof, being hereinafter referred to as the “Total 

8

 
Payments”), would be subject (in whole or in part) to the excise tax imposed by Section 4999 of the Code (the “Excise Tax”), 
then the Total Payments shall be reduced (in the order provided in Section 8(b)) to the minimum extent necessary to avoid the 
imposition of the Excise Tax on the Total Payments, but only if (i) the net amount of such Total Payments, as so reduced (and 
after subtracting the net amount of federal, state and local income and employment taxes on such reduced Total Payments and 
after  taking  into  account  the  phase  out  of  itemized  deductions  and  personal  exemptions  attributable  to  such  reduced  Total 
Payments), is greater than or equal to (ii) the net amount of such Total Payments without such reduction (but after subtracting the 
net amount of federal, state and local income and employment taxes on such Total Payments and the amount of the Excise Tax to 
which Executive would be subject in respect of such unreduced Total Payments and after taking into account the phase out of 
itemized deductions and personal exemptions attributable to such unreduced Total Payments).

(b)

The  Total  Payments  shall  be  reduced  in  the  following  order:    (i)  reduction  on  a  pro-rata  basis  of  any  cash 
severance payments that are exempt from Section 409A of the Code (“Section 409A”), (ii) reduction on a pro-rata basis of any 
non-cash  severance  payments  or  benefits  that  are  exempt  from  Section  409A,  (iii)  reduction  on  a  pro-rata  basis  of  any  other 
payments or benefits that are exempt from Section 409A, and (iv) reduction of any payments or benefits otherwise payable to 
Executive on a pro-rata basis or such other manner that complies with Section 409A; provided, in case of clauses (ii), (iii) and 
(iv), that reduction of any payments attributable to the acceleration of vesting of Company equity awards shall be first applied to 
Company equity awards that would otherwise vest last in time.

(c)

All determinations regarding the application of this Section 8 shall be made by an accounting firm or consulting 
group  with  experience  in  performing  calculations  regarding  the  applicability  of  Section  280G  of  the  Code  and  the  Excise  Tax 
selected by the Company (the “Independent Advisors”).  For purposes of determinations, no portion of the Total Payments shall 
be taken into account which, in the opinion of the Independent Advisors, (i) does not constitute a “parachute payment” within the 
meaning  of  Section  280G(b)(2)  of  the  Code  (including  by  reason  of  Section  280G(b)(4)(A)  of  the  Code)  or  (ii)  constitutes 
reasonable compensation for services actually rendered, within the meaning of Section 280G(b)(4)(B) of the Code, in excess of 
the  “base  amount”  (as  defined  in  Section  280G(b)(3)  of  the  Code)  allocable  to  such  reasonable  compensation.    The  costs  of 
obtaining such determination and all related fees and expenses (including related fees and expenses incurred in any later audit) 
shall be borne by the Company.

(d)

In  the  event  it  is  later  determined  that  a  greater  reduction  in  the  Total  Payments  should  have  been  made  to 

implement the objective and intent of this Section 8, the excess amount shall be returned promptly by Executive to the Company.

9.Miscellaneous Provisions.

(a)

Governing Law.  This Agreement shall be governed, construed, interpreted and enforced in accordance with its 
express terms, and otherwise in accordance with the substantive laws of the Commonwealth of Massachusetts without reference 
to  the  principles  of  conflicts  of  law  of  the  Commonwealth  of  Massachusetts  or  any  other  jurisdiction  that  would  result  in  the 
application of the laws of a jurisdiction other than the Commonwealth of Massachusetts, and where applicable, the laws of the 
United States.

9

 
(b)

Validity.  The invalidity or unenforceability of any provision or provisions of this Agreement shall not affect the 

validity or enforceability of any other provision of this Agreement, which shall remain in full force and effect.  

(c)

Notices.  Any notice, request, claim, demand, document and other communication hereunder to any Party shall 
be effective upon receipt (or refusal of receipt) and shall be in writing and delivered personally or sent by facsimile or certified or 
registered mail, postage prepaid, as follows:

(i)

(ii)

If to the Company, the Chief Legal Officer at its headquarters,

If to Executive, at the last address that the Company has in its personnel records for Executive, or

(iii)

at any other address as any Party shall have specified by notice in writing to the other Party.

(d)

Counterparts.  This Agreement may be executed in several counterparts, each of which shall be deemed to be an 
original, but all of which together will constitute one and the same Agreement.  Signatures delivered by facsimile or PDF shall be 
deemed effective for all purposes.

(e)

Entire  Agreement.    The  terms  of  this  Agreement,  and  the  Proprietary  Information  Agreement  incorporated 
herein by reference as set forth in Section 5, are intended by the Parties to be the final expression of their agreement with respect 
to the subject matter hereof and supersede all prior understandings and agreements, whether written or oral.  The Parties further 
intend  that  this  Agreement  shall  constitute  the  complete  and  exclusive  statement  of  their  terms  and  that  no  extrinsic  evidence 
whatsoever may be introduced in any judicial, administrative, or other legal proceeding to vary the terms of this Agreement.

(f)

Amendments; Waivers.  This Agreement may not be modified, amended, or terminated except by an instrument 
in  writing,  signed  by  Executive  and  a  duly  authorized  officer  of  Company.    By  an  instrument  in  writing  similarly  executed, 
Executive or a duly authorized officer of the Company may waive compliance by the other Party with any specifically identified 
provision of this Agreement that such other Party was or is obligated to comply with or perform; provided, however, that such 
waiver shall not operate as a waiver of, or estoppel with respect to, any other or subsequent failure.  No failure to exercise and no 
delay in exercising any right, remedy, or power hereunder will preclude any other or further exercise of any other right, remedy, 
or power provided herein or by law or in equity.  

(g)

No Inconsistent Actions.  The Parties hereto shall not voluntarily undertake or fail to undertake any action or 
course of action inconsistent with the provisions or essential intent of this Agreement.  Furthermore, it is the intent of the Parties 
hereto  to  act  in  a  fair  and  reasonable  manner  with  respect  to  the  interpretation  and  application  of  the  provisions  of  this 
Agreement.

(h)

Construction.    This  Agreement  shall  be  deemed  drafted  equally  by  both  the  Parties.  Its  language  shall  be 
construed as a whole and according to its fair meaning.  Any presumption or principle that the language is to be construed against 
any Party shall not apply.  The headings in this Agreement are only for convenience and are not intended to affect construction or 

10

 
interpretation.  Any references to paragraphs, subparagraphs, sections or subsections are to those parts of this Agreement, unless 
the context clearly indicates to the contrary.  Also, unless the context clearly indicates to the contrary, (i) the plural includes the 
singular and the singular includes the plural; (ii) “and” and “or” are each used both conjunctively and disjunctively; (iii) “any,” 
“all,”  “each,”  or  “every”  means  “any  and  all,”  and  “each  and  every”;  (iv)  “includes”  and  “including”  are  each  “without 
limitation”; (v) “herein,” “hereof,” “hereunder” and other similar compounds of the word “here” refer to the entire Agreement 
and not to any particular paragraph, subparagraph, section or subsection; and (vi) all pronouns and any variations thereof shall be 
deemed  to  refer  to  the  masculine,  feminine,  neuter,  singular  or  plural  as  the  identity  of  the  entities  or  persons  referred  to  may 
require.

(i)

Arbitration.    Any  controversy,  claim  or  dispute  arising  out  of  or  relating  to  this  Agreement,  shall  be  settled 
solely  and  exclusively  by  a  binding  arbitration  process  administered  by  JAMS/Endispute  in  Boston,  Massachusetts.    Such 
arbitration shall be conducted in accordance with the then-existing JAMS/Endispute Rules of Practice and Procedure, with the 
following exceptions if in conflict:  (i) one arbitrator who is a retired judge shall be chosen by JAMS/Endispute; (ii) each Party to 
the arbitration will pay one-half of the expenses and fees of the arbitrator, together with other expenses of the arbitration incurred 
or  approved  by  the  arbitrator;  and  (iii)  arbitration  may  proceed  in  the  absence  of  any  Party  if  written  notice  (pursuant  to  the 
JAMS/Endispute rules and regulations) of the proceedings has been given to such Party.  Each Party shall bear its own attorney’s 
fees and expenses; provided that the arbitrator may assess the prevailing Party’s fees and costs against the non-prevailing Party as 
part  of  the  arbitrator’s  award.    The  Parties  agree  to  abide  by  all  decisions  and  awards  rendered  in  such  proceedings.    Such 
decisions and awards rendered by the arbitrator shall be final and conclusive.  All such controversies, claims or disputes shall be 
settled in this manner in lieu of any action at law or equity; provided, however, that nothing in this subsection shall be construed 
as precluding the bringing of an action for injunctive relief or specific performance as provided in this Agreement or Proprietary 
Information Agreement.  This dispute resolution process and any arbitration hereunder shall be confidential and neither any Party 
nor the neutral arbitrator shall disclose the existence, contents or results of such process without the prior written consent of all 
Parties, except where necessary or compelled in a court to enforce this arbitration provision or an award from such arbitration or 
otherwise  in  a  legal  proceeding.    If  JAMS/Endispute  no  longer  exists  or  is  otherwise  unavailable,  the  Parties  agree  that  the 
American Arbitration Association (“AAA”) shall administer the arbitration in accordance with its then-existing rules as modified 
by this subsection.  In such event, all references herein to JAMS/Endispute shall mean AAA.  Notwithstanding the foregoing, 
Executive and the Company each have the right to resolve any issue or dispute over intellectual property rights by court action 
instead of arbitration.

(j)

Enforcement.  If any provision of this Agreement is held to be illegal, invalid or unenforceable under present or 
future laws effective during the Term, such provision shall be fully severable; this Agreement shall be construed and enforced as 
if such illegal, invalid or unenforceable provision had never comprised a portion of this Agreement; and the remaining provisions 
of this Agreement shall remain in full force and effect and shall not be affected by the illegal, invalid or unenforceable provision 
or by its severance from this Agreement.  Furthermore, in lieu of such illegal, invalid or unenforceable provision there shall be 
added automatically as part of this Agreement a provision as similar in terms to such illegal, invalid or unenforceable provision 
as may be possible and be legal, valid and enforceable.

11

 
(k)

Withholding.  The Company shall be entitled to withhold from any amounts payable under this Agreement any 
federal, state, local or foreign withholding or other taxes or charges which the Company is required to withhold. The Company 
shall be entitled to rely on the advice of counsel if any questions as to the amount or requirement of withholding shall arise.

(l)

Section 409A.

(i)

General.  The intent of the Parties is that the payments and benefits under this Agreement comply with 
or be exempt from Section 409A and, accordingly, to the maximum extent permitted, this Agreement shall be interpreted 
to be in compliance therewith.  

(ii)

Separation  from  Service.    Notwithstanding  anything  in  this  Agreement  to  the  contrary,  any 
compensation  or  benefits  payable  under  this  Agreement  that  is  designated  under  this  Agreement  as  payable  upon 
Executive’s  termination  of  employment  shall  be  payable  only  upon  Executive’s  “separation  from  service”  with  the 
Company within the meaning of Section 409A (a “Separation from Service”) and, except as provided below, any such 
compensation or benefits described in Section 4  shall  not  be  paid,  or,  in  the  case  of  installments,  shall  not  commence 
payment, until the thirtieth (30th) day following Executive’s Separation from Service (the “First Payment Date”).  Any 
installment payments that would have been made to Executive during the thirty (30) day period immediately following 
Executive’s Separation from Service but for the preceding sentence shall be paid to Executive on the First Payment Date 
and the remaining payments shall be made as provided in this Agreement.

(iii)  Specified Employee.  Notwithstanding anything in this Agreement to the contrary, if Executive is deemed 
by the Company at the time of Executive’s Separation from Service to be a “specified employee” for purposes of Section 
409A,  to  the  extent  delayed  commencement  of  any  portion  of  the  benefits  to  which  Executive  is  entitled  under  this 
Agreement  is  required  in  order  to  avoid  a  prohibited  distribution  under  Section  409A,  such  portion  of  Executive’s 
benefits  shall  not  be  provided  to  Executive  prior  to  the  earlier  of  (i)  the  expiration  of  the  six-month  period  measured 
from the date of Executive’s Separation from Service with the Company or (ii) the date of Executive’s death.  Upon the 
first business day following the expiration of the applicable Section 409A period, all payments deferred pursuant to the 
preceding sentence shall be paid in a lump sum to Executive (or Executive’s estate or beneficiaries), and any remaining 
payments due to Executive under this Agreement shall be paid as otherwise provided herein.  

(iv)  Expense  Reimbursements.    To  the  extent  that  any  reimbursements  under  this  Agreement  are  subject  to 
Section 409A, (i) any such reimbursements payable to Executive shall be paid to Executive no later than December 31 of 
the year following the year in which the expense was incurred, (ii) Executive shall submit Executive’s reimbursement 
request promptly following the date the expense is incurred, (iii) the amount of expenses reimbursed in one year shall 
not  affect  the  amount  eligible  for  reimbursement  in  any  subsequent  year,  other  than  medical  expenses  referred  to  in 
Section  105(b)  of  the  Code,  and  (iv)  Executive’s  right  to  reimbursement  under  this  Agreement  will  not  be  subject  to 
liquidation or exchange for another benefit.

12

 
(v) 

Installments.    Executive’s  right  to  receive  any  installment  payments  under  this  Agreement,  including 
without  limitation  any  continuation  salary  payments  that  are  payable  on  Company  payroll  dates,  shall  be  treated  as  a 
right  to  receive  a  series  of  separate  payments  and,  accordingly,  each  such  installment  payment  shall  at  all  times  be 
considered  a  separate  and  distinct  payment  as  permitted  under  Section  409A.    Except  as  otherwise  permitted  under 
Section  409A,  no  payment  hereunder  shall  be  accelerated  or  deferred  unless  such  acceleration  or  deferral  would  not 
result in additional tax or interest pursuant to Section 409A.

10.Executive Acknowledgement.

Executive acknowledges that Executive has read and understands this Agreement, is fully aware of its legal effect, has 
not acted in reliance upon any representations or promises made by the Company other than those contained in writing herein, 
and has entered into this Agreement freely based on Executive’s own judgment.

[Signature Page Follows]

13

 
 
 
IN WITNESS WHEREOF, the Parties have executed this Agreement on the date and year first above written.  

SERES THERAPEUTICS, INC.

By: /s/ Eric D. Shaff 

Name: Eric D. Shaff 
Title: President, CEO 

/s/ Paula Cloghessy  
Paula Cloghessy

[Signature Page to Employment Agreement]

|||

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
EXHIBIT A

Separation Agreement and Release

This Separation Agreement and Release (“Agreement”) is made by and between Paula Cloghessy (“Executive”) and Seres 
Therapeutics, Inc. (the “Company”) (collectively referred to as the “Parties” or individually referred to as a “Party”).  Capitalized 
terms used but not defined in this Agreement shall have the meanings set forth in the Employment Agreement (as defined below).

  WHEREAS, the Parties have previously entered into that certain Employment Agreement, dated as of _____________, 

2021 (the “Employment Agreement”); and 

  WHEREAS, in connection with Executive’s termination of employment with the Company or a subsidiary or affiliate of 
the Company effective ________, 20__, the Parties wish to resolve any and all disputes, claims, complaints, grievances, charges, 
actions,  petitions,  and  demands  that  Executive  may  have  against  the  Company  and  any  of  the  Releasees  as  defined  below, 
including, but not limited to, any and all claims arising out of or in any way related to Executive’s employment with or separation 
from the Company or its subsidiaries or affiliates but, for the avoidance of doubt, nothing herein will be deemed to release any 
rights or remedies in connection with Executive’s ownership of vested equity securities of the Company or Executive’s right to 
indemnification  by  the  Company  or  any  of  its  affiliates  pursuant  to  contract  or  applicable  law  (collectively,  the  “Retained 
Claims”).

NOW, THEREFORE, in consideration of the severance payments and benefits described in Section 4 of the Employment 
Agreement, which, pursuant to the Employment Agreement, are conditioned on Executive’s execution and non-revocation of this 
Agreement, and in consideration of the mutual promises made herein, the Company and Executive hereby agree as follows:

1.  Severance Payments and Benefits; Salary and Benefits.  The Company agrees to provide Executive with the severance 
payments and benefits described in Section 4(b) and/or Section 4(c) of the Employment Agreement, payable at the times set forth 
in, and subject to the terms and conditions of, the Employment Agreement. In addition, to the extent not already paid, and subject 
to the terms and conditions of the Employment Agreement, the Company shall pay or provide to Executive all other payments or 
benefits described in Section 3(c) of the Employment Agreement, subject to and in accordance with the terms thereof.

2.  Release of Claims.  Executive agrees that, other than with respect to the Retained Claims, the foregoing consideration 
represents  settlement  in  full  of  all  outstanding  obligations  owed  to  Executive  by  the  Company,  any  of  its  direct  or  indirect 
subsidiaries  and  affiliates,  and  any  of  its  or  their  respective  current  and  former  officers,  directors,  equity  holders,  managers, 
employees,  agents,  investors,  attorneys,  shareholders,  administrators,  affiliates,  benefit  plans,  plan  administrators,  insurers, 
trustees,  divisions,  and  subsidiaries  and  predecessor  and  successor  corporations  and  assigns  (collectively,  the  “Releasees”).  
Executive, on Executive’s own behalf and on behalf of any of Executive’s affiliated companies or entities and any of Executive’s 
or their respective heirs, family members, executors, agents, and assigns, other than with respect to the Retained Claims, hereby 
and forever releases the Releasees from, and agrees not to sue concerning, or in any manner to institute, prosecute, or pursue, any 
claim,  complaint,  charge,  duty,  obligation,  or  cause  of  action  relating  to  any  matters  of  any  kind,  whether  presently  known  or 
unknown, 

|||

 
 
 
 
 
 
suspected  or  unsuspected,  that  Executive  may  possess  against  any  of  the  Releasees  arising  from  any  omissions,  acts,  facts,  or 
damages that have occurred up until and including the date Executive signs this Agreement, including, without limitation:

(a)  any and all claims relating to or arising from Executive’s employment or service relationship with the Company or 

any of its direct or indirect subsidiaries or affiliates and the termination of that relationship;

(b)  any and all claims relating to, or arising from, Executive’s right to purchase, or actual purchase of any shares of  
stock  or  other  equity  interests  of  the  Company  or  any  of  its  affiliates,  including,  without  limitation,  any  claims  for  fraud, 
misrepresentation,  breach  of  fiduciary  duty,  breach  of  duty  under  applicable  state  law,  and  securities  fraud  under  any  state  or 
federal law;

(c)  any  and  all  claims  for  wrongful  discharge  of  employment;  termination  in  violation  of  public  policy;

discrimination; harassment; retaliation; breach of contract, both express and implied; breach of covenant of good faith and fair 
dealing, both express and implied; promissory estoppel; negligent or intentional infliction of emotional distress; fraud; negligent 
or  intentional  misrepresentation;  negligent  or  intentional  interference  with  contract  or  prospective  economic  advantage;  unfair 
business  practices;  defamation;  libel;  slander;  negligence;  personal  injury;  assault;  battery;  invasion  of  privacy;  false 
imprisonment; conversion; and disability benefits;

(d)  any and all claims for violation of any federal, state, or municipal statute, including, but not limited to, Title VII of 
the Civil Rights Act of 1964; the Civil Rights Act of 1991; the Rehabilitation Act of 1973; the Americans with Disabilities Act of 
1990; the Equal Pay Act; the Fair Labor Standard Act; the Fair Credit Reporting Act; the Age Discrimination in Employment Act 
of  1967;  the  Older  Workers  Benefit  Protection  Act;  the  Employee  Retirement  Income  Security  Act  of  1974;  the  Worker 
Adjustment and Retraining Notification Act; the Family and Medical Leave Act; and the Sarbanes-Oxley Act of 2002;

(e)  any and all claims for violation of the federal or any state constitution;

(f)    any  and  all  claims  arising  out  of  any  other  laws  and  regulations  relating  to  employment  or  employment

discrimination;

(g)  any claim for any loss, cost, damage, or expense arising out of any dispute over the non-withholding or other tax  

treatment of any of the proceeds received by Executive as a result of this Agreement; 

(h)  any and all claims arising out of the wage and hour and wage payments laws and regulations of the state or states 
in which Executive has provided service to the Company or any of its affiliates (including without limitation the Massachusetts 
Payment of Wages Law); and

(i)  any and all claims for attorneys’ fees and costs.

Executive agrees that the release set forth in this section shall be and remain in effect in all respects as a complete general release 
as  to  the  matters  released.    This  release  does  not  release  claims  that  cannot  be  released  as  a  matter  of  law,  including,  but  not 
limited to, Executive’s right to report 

A-2

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
possible violations of federal law or regulation to any governmental agency or entity in accordance with the provisions of and 
rules promulgated under Section 21F of the Securities Exchange Act of 1934 or Section 806 of the Sarbanes-Oxley Act of 2002, 
or any other whistleblower protection provisions of state or federal law or regulation (including Executive’s right to receive an 
award  for  information  provided  to  any  such  government  agencies),  Executive’s  right  to  file  a  charge  with  or  participate  in  a 
charge  by  the  Equal  Employment  Opportunity  Commission,  or  any  other  local,  state,  or  federal  administrative  body  or 
government  agency  that  is  authorized  to  enforce  or  administer  laws  related  to  employment,  against  the  Company  (with  the 
understanding that Executive’s release of claims herein bars Executive from recovering monetary or other individual relief from 
the Company or any Releasee in connection with any charge, investigation or proceeding, or any related complaint or lawsuit, 
filed by Executive or by anyone else on Executive’s behalf before the federal Equal Employment Opportunity Commission or a 
comparable state or local agency), claims for unemployment compensation or any state disability insurance benefits pursuant to 
the terms of applicable state law, claims to continued participation in certain of the Company’s group benefit plans pursuant to 
the  terms  and  conditions  of  COBRA,  claims  to  any  benefit  entitlements  vested  as  the  date  of  separation  of  Executive’s 
employment, pursuant to written terms of any employee benefit plan of the Company or its affiliates and Executive’s right under 
applicable law, and any Retained Claims.  This release further does not release claims for breach of Section 3(c), Section 4(b) or 
Section 4(c) of the Employment Agreement.

3.  Acknowledgment  of  Waiver  of  Claims  under  ADEA.    Executive  understands  and  acknowledges  that  Executive  is 
waiving and releasing any rights Executive may have under the Age Discrimination in Employment Act of 1967 (“ADEA”), and 
that this waiver and release is knowing and voluntary.  Executive understands and agrees that this waiver and release does not 
apply  to  any  rights  or  claims  that  may  arise  under  the  ADEA  after  the  date  Executive  signs  this  Agreement.    Executive 
understands and acknowledges that the consideration given for this waiver and release is in addition to anything of value to which 
Executive was already entitled.  Executive further understands and acknowledges that Executive has been advised by this writing 
that:  (a) Executive should consult with an attorney prior to executing this Agreement; (b) Executive has 21 days within which to 
consider this Agreement, and the Parties expressly agree that such time period to review this Agreement shall not be extended 
upon  any  material  or  immaterial  changes  to  this  Agreement;  (c)  Executive  has  seven  business  days  following  Executive’s 
execution of this Agreement to revoke this Agreement pursuant to written notice to the General Counsel of the Company; (d) this 
Agreement  shall  not  be  effective  until  after  the  revocation  period  has  expired;  and  (e)  nothing  in  this  Agreement  prevents  or 
precludes Executive from challenging or seeking a determination in good faith of the validity of this waiver under the ADEA, nor 
does  it  impose  any  condition  precedent,  penalties,  or  costs  for  doing  so,  unless  specifically  authorized  by  federal  law.    In  the 
event Executive signs this Agreement and returns it to the Company in less than the 21 day period identified above, Executive 
hereby  acknowledges  that  Executive  has  freely  and  voluntarily  chosen  to  waive  the  time  period  allotted  for  considering  this 
Agreement.

4. 

Post-Termination  Obligations.    Executive  reaffirms  Executive’s  continuing  obligations  under  the  Proprietary 
Information  Agreement  between  Executive  and  the  Company  dated  as  of  [_________],  and,  without  limiting  the  foregoing, 
Executive remakes the non-competition covenants set forth in the Proprietary Information Agreement as if set forth herein. In 
addition, Executive agrees to refrain from Disparaging (as defined below) the Company and its affiliates, 

A-3

 
 
 
including their respective services, technologies, practices, directors and officers. The Company agrees to instruct its officers and 
directors to refrain from Disparaging Executive. Nothing in this Section shall preclude any Party from making truthful statements 
that are reasonably necessary to comply with applicable law, regulation or legal process, or to defend or enforce a Party’s rights 
under this Agreement or the Employment Agreement. For purposes of this Agreement, “Disparaging” means making remarks, 
comments or statements, whether written or oral, that impugn the character, integrity, reputation or abilities of the individual or 
entity being disparaged.

5.  Severability.  In the event that any provision or any portion of any provision hereof or any surviving agreement made a 
part  hereof  becomes  or  is  declared  by  a  court  of  competent  jurisdiction  or  arbitrator  to  be  illegal,  unenforceable,  or  void,  this 
Agreement shall continue in full force and effect without said provision or portion of provision.

6  No Oral Modification.  This Agreement may only be amended in a writing signed by Executive and a duly authorized 

officer of the Company.

7.  Governing Law; Dispute Resolution.  This Agreement shall be subject to the provisions of Sections 9(a), 9(c) and 9(i) 

of the Employment Agreement. 

8. 

Effective  Date.    Executive  has  seven  business  days  after  Executive  signs  this  Agreement  to  revoke  it  and  this 
Agreement  will  become  effective  upon  the  expiration  of  such  seven  business  day  period,  so  long  as  it  has  been  signed  by  the 
Parties and has not been revoked by Executive before that date.

9. 

Trade  Secrets;  Whistleblower  Protections.  In  accordance  with  18  U.S.C.  §1833,  notwithstanding  anything  to  the 
contrary in this Agreement, the Employment Agreement, the Proprietary Information Agreement or any other agreement between 
Executive and the Company or any of its subsidiaries in effect as of the date Executive receives this Agreement (together, the 
“Subject Documents”): (a) Executive will not be in breach of the Subject Documents, and shall not be held criminally or civilly 
liable under any federal or state trade secret law (i) for the disclosure of a trade secret that is made in confidence to a federal, 
state, or local government official or to an attorney solely for the purpose of reporting or investigating a suspected violation of 
law, or (ii) for the disclosure of a trade secret that is made in a complaint or other document filed in a lawsuit or other proceeding, 
if such filing is made under seal; and (b) if Executive files a lawsuit for retaliation by the Company for reporting a suspected 
violation of law, Executive may disclose the trade secret to Executive’s attorney, and may use the trade secret information in the 
court proceeding, if Executive files any document containing the trade secret under seal, and does not disclose the trade secret, 
except pursuant to court order. Furthermore, the Parties agree that nothing in the Subject Documents prohibits Executive from 
reporting possible violations of federal law or regulation to any governmental agency or entity in accordance with the provisions 
of and rules promulgated under Section 21F of the Securities Exchange Act of 1934 or Section 806 of the Sarbanes-Oxley Act of 
2002, or any other whistleblower protection provisions of state or federal law or regulation or releases or restrains Executive’s 
right to receive an award for information provided to any such government agencies.

10.  Voluntary  Execution  of  Agreement.    Executive  understands  and  agrees  that  Executive  executed  this  Agreement 

voluntarily, without any duress or undue influence on the part or behalf 

A-4

 
 
 
 
 
 
 
 
of the Company or any third party, with the full intent of releasing all of Executive’s claims against the Company and any of the 
other Releasees.  Executive acknowledges that:  (a) Executive has read this Agreement; (b) Executive has not relied upon any 
representations or statements made by the Company that are not specifically set forth in this Agreement; (c) Executive has been 
represented in the preparation, negotiation, and execution of this Agreement by legal counsel of Executive’s own choice or has 
elected not to retain legal counsel; (d) Executive understands the terms and consequences of this Agreement and of the releases it 
contains; and (e) Executive is fully aware of the legal and binding effect of this Agreement. 

[Signature Page Follows]

A-5

 
 
 
IN WITNESS WHEREOF, the Parties have executed this Agreement on the respective dates set forth below.  

Dated: 

Dated:

Paula Cloghessy

SERES THERAPEUTICS, INC.

By:   
Name:
Title:

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Employee Non-Competition, Non-Solicitation, Confidentiality and Assignment Agreement

In consideration and as a condition of my employment or continued employment (including my salary or wage, any bonus I may receive, and any 

equity granted to me) by Seres Therapeutics, Inc. (the “Company”), I hereby agree as follows:

EXHIBIT B

 
 
 
 
 
1)Proprietary Information.  I agree that all information, whether or not in writing, whether or not disclosed before or after I was first employed by the 
Company,  concerning  the  Company’s  business,  technology,  business  relationships  or  financial  affairs  that  the  Company  has  not  released  to  the  general 
public (collectively, “Proprietary Information”), and all tangible embodiments thereof, are and will be the exclusive property of the Company.  By way of 
illustration, Proprietary Information may include information or material that has not been made generally available to the public, such as:  (a) corporate 
information, including plans, strategies, methods, policies, resolutions, notes, email correspondence, negotiations or litigation; (b) marketing information, 
including strategies, methods, customer identities or other information about customers, prospect identities or other information about prospects, or market 
analyses  or  projections;  (c)  financial  information,  including  cost  and  performance  data,  debt  arrangements,  equity  structure,  investors  and  holdings, 
purchasing and sales data and price lists; and (d) operational and technological information, including plans, specifications, manuals, forms, templates, 
software,  designs,  methods,  procedures,  formulas,  discoveries,  inventions,  improvements,  biological  or  chemical  materials,  concepts  and  ideas;  and  (e) 
personnel  information,  including  personnel  lists,  reporting  or  organizational  structure,  resumes,  personnel  data,  compensation  structure,  performance 
evaluations and termination arrangements or documents.  Proprietary Information includes, without limitation, (1) information received in confidence by 
the  Company  from  its  customers  or  suppliers  or  other  third  parties,  and  (2)  all  biological  or  chemical  materials  and  other  tangible  embodiments  of  the 
Proprietary Information. Nothing in this Agreement shall prohibit me from reporting possible violations of federal law or regulation to any governmental 
agency or entity in accordance with the provisions of and rules promulgated under Section 21F of the Securities Exchange Act of 1934 or Section 805 of 
the Sarbanes-Oxley Act of 2002, or any other whistleblower protection provisions of state or federal law or regulation.

2)Recognition of Company’s Rights.    I  will  not,  at  any  time,  without  the  Company’s  prior  written  permission,  either  during  or  after  my  employment, 
disclose or transfer any Proprietary Information to anyone outside of the Company, or use or permit to be used any Proprietary Information for any purpose 
other  than  the  performance  of  my  duties  as  an  employee  of  the  Company.    I  will  cooperate  with  the  Company  and  use  my  best  efforts  to  prevent  the 
unauthorized disclosure of all Proprietary Information.  I will deliver to the Company all copies and other tangible embodiments of Proprietary Information 
in my possession or control upon the earlier of a request by the Company or termination of my employment.

3)Rights of Others.  I understand that the Company is now and may hereafter be subject to non-disclosure or confidentiality agreements with third persons 
which require the Company to protect or refrain from use of proprietary information.  I agree to be bound by the terms of such agreements in the event I 
have access to such proprietary information.

4)Commitment  to  Company;  Avoidance  of  Conflict  of  Interest.    While  an  employee  of  the  Company,  I  will  devote  my  full-time  efforts  to  the 
Company’s business and I will not engage in any other business activity that conflicts with my duties to the Company.  I will advise the president of the 
Company  or  his  or  her  nominee  at  such  time  as  any  activity  of  either  the  Company  or  another  business  presents  me  with  a  conflict  of  interest  or  the 
appearance of a conflict of interest as an employee of the Company.  I will take whatever action is requested of me by the Company to resolve any conflict 
or appearance of conflict which it finds to exist.

5)Developments.  I hereby assign and transfer and, to the extent any such assignment cannot be made at present, will assign and transfer, to the Company 
and  its  successors  and  assigns,  all  my  right,  title  and  interest  in  and  to  all  Developments  (as  defined  below)  that:  (a)  are  created,  developed,  made, 
conceived or reduced to practice by me (alone or jointly with others) or under my direction (collectively, “conceived”) during the period of my employment 
and six (6) months thereafter and that relate to the business of the Company or to products, methods or services being researched, developed, manufactured 
or  sold  by  the  Company;  or  (b)  result  from  tasks  assigned  to  me  by  the  Company;  or  (c)  result  from  the  use  of  premises,  Proprietary  Information  or 
personal property (whether tangible or intangible) owned, licensed or leased by the Company (collectively, “Company-Related Developments”), and all 
patent rights, trademarks, copyrights and other intellectual property rights in all countries and territories worldwide claiming, covering or otherwise arising 
from  or  pertaining  to  Company-Related  Developments  (collectively,  “Intellectual  Property  Rights”).    I  further  agree  that  “Company-Related 
Developments”  include,  without  limitation,  all  Developments  that  (i)  were  conceived  by  me  before  my  employment,  (ii)  relate  to  the  business  of  the 
Company  or  to  products,  methods  or  services  being  researched,  developed,  manufactured  or  sold  by  the  Company,  and  (iii)  were  not  subject  to  an 
obligation to assign to another entity when conceived.  I will make full and prompt disclosure to the Company of all Company-Related Developments, as 
well  as  all  other  Developments  conceived  by  me  during  the  period  of  my  employment  and  six  (6)  months  thereafter.    I  acknowledge  that  all  work 
performed by me as an employee of the Company is on a “work for hire” basis.  I hereby waive all claims to any moral rights or other special rights 

 
 
which  I  may  have  or  accrue  in  any  Company-Related  Developments.    “Developments”  mean  inventions,  discoveries,  designs,  developments,  methods, 
modifications, improvements, processes, biological or chemical materials, algorithms, databases, computer programs, formulae, techniques, trade secrets, 
graphics or images, audio or visual works, and other works of authorship.

To  preclude  any  possible  uncertainty,  I  have  set  forth  on  Exhibit  A  attached  hereto  a  complete  list  of  Developments  conceived  by  me  before  my 
employment that are not Company-Related Developments (“Prior Inventions”).  I have also listed on Exhibit A all patent rights of which I am an inventor, 
other than those contained within Intellectual Property Rights (“Other Patent Rights”).  If no such disclosure is attached, I represent that there are no Prior 
Inventions or Other Patent Rights.  If, in the course of my employment with the Company, I incorporate a Prior Invention into a Company product, process 
or  research  or  development  program  or  other  work  done  for  the  Company,  I  hereby  grant  to  the  Company  a  nonexclusive,  royalty-free,  fully  paid-up, 
irrevocable, perpetual, worldwide license (with the full right to sublicense through multiple tiers) to make, have made, modify, use, offer for sale, import 
and  sell  such  Prior  Invention.    Notwithstanding  the  foregoing,  I  will  not  incorporate,  or  permit  to  be  incorporated,  Prior  Inventions  in  any  Company-
Related Development without the Company’s prior written consent.

I understand that to the extent this Agreement is required to be construed in accordance with the laws of any state which precludes a requirement in an 
employee agreement to assign certain classes of inventions made by an employee, this Section will be interpreted not to apply to any invention which a 
court rules and/or the Company agrees falls within such classes.

6)Documents  and  Other  Materials.    I  will  keep  and  maintain  adequate  and  current  records  of  all  Proprietary  Information  and  Company-Related 
Developments  conceived  by  me,  which  records  will  be  available  to  and  remain  the  sole  property  of  the  Company  at  all  times.    All  files,  letters,  notes, 
memoranda,  reports,  records,  data,  sketches,  drawings,  notebooks,  layouts,  charts,  quotations  and  proposals,  specification  sheets,  program  listings, 
blueprints,  models,  prototypes,  materials  or  other  written,  photographic  or  other  tangible  material  containing  or  embodying  Proprietary  Information, 
whether  created  by  me  or  others,  which  come  into  my  custody  or  possession,  are  the  exclusive  property  of  the  Company  to  be  used  by  me  only  in  the 
performance of my duties for the Company.  In the event of the termination of my employment for any reason, I will deliver to the Company all of the 
foregoing, and all other materials of any nature pertaining to the Proprietary Information of the Company and to my work, and will not take or keep in my 
possession any of the foregoing or any copies.  Any property situated on the Company’s premises and owned by the Company, including laboratory space, 
computers, disks and other storage media, filing cabinets or other work areas, is subject to inspection by the Company at any time with or without notice.

7)Enforcement of Intellectual Property Rights.  I will cooperate fully with the Company, both during and after my employment with the Company, with 
respect to the procurement, maintenance and enforcement of Intellectual Property Rights, as well as all other patent rights, trademarks, copyrights and other 
intellectual property rights in all countries and territories worldwide owned by or licensed to the Company.  I will sign, both during and after the term of 
this Agreement, all papers, including copyright applications, patent applications, declarations, oaths, assignments of priority rights, and powers of attorney, 
which  the  Company  may  deem  necessary  or  desirable  in  order  to  protect  its  rights  and  interests  in  any  Company-Related  Development  or  Intellectual 
Property Rights.  If the Company is unable, after reasonable effort, to secure my signature on any such papers, I hereby irrevocably designate and appoint 
each officer of the Company as my agent and attorney-in-fact to execute any such papers on my behalf, and to take any and all actions as the Company may 
deem necessary or desirable in order to protect its rights and interests in the same.

8)Non-Competition and Non-Solicitation.  In order to protect the Company’s Proprietary Information and good will, during my employment and for a 
period of twelve (12) months following the termination of my employment for any reason (the “Restricted Period”):

a)in  consideration  of  the  offer  of  employment,  my  salary  or  wage,  any  bonus  I  may  receive,  and  the  equity  granted  to  me  in  connection  with 
commencement of employment with the Company, all of which I deem as fair and reasonable consideration for entering into this Agreement, I will not 
directly or indirectly, whether as owner, partner, shareholder, director, consultant, agent, employee, co-venturer or otherwise, engage, participate or invest 
in any business that develops, manufactures or markets microbiome therapeutics that are competitive with products or services of the Company, or that the 
Company has under development, or that are the subject of active planning at any time during my employment (collectively, the “Competitive Products”); 
provided that this will not prohibit any possible investment in publicly traded stock of a company representing less than one percent of the stock of such 
company and provided further that this provision shall apply only if I am an exempt employee (as that term is defined by the Fair Labor Standards Act) or 
if and when I subsequently become an exempt employee; and

 
 
b)I will not directly or indirectly, in any manner, other than for the benefit of the Company, (i) call upon, solicit, divert or take away any of the customers, 
business or prospective customers of the Company or any of its suppliers, and/or (ii) solicit, entice or attempt to persuade any other employee or consultant 
of the Company to leave the services of the Company for any reason.  

I acknowledge and agree that if I violate any of the provisions of this Section, in addition to any other remedies to which the Company may be entitled in 
law or equity, the running of the Restricted Period will be extended by the time during which I engage in such violation(s) or up to twenty four (24) months, 
whichever is longer.

I acknowledge and agree that the provisions of this agreement shall apply during and following my employment by the Company and shall not be affected 
by any change in my job duties, whether material or immaterial.

I further acknowledge and agree that I have the right and have had the opportunity to consult with an attorney prior to signing this Agreement.

9)Government  Contracts.    I  acknowledge  that  the  Company  may  have  from  time  to  time  agreements  with  other  persons  or  with  the  United  States 
Government  or  its  agencies  which  impose  obligations  or  restrictions  on  the  Company  regarding  inventions  made  during  the  course  of  work  under  such 
agreements  or  regarding  the  confidential  nature  of  such  work.    I  agree  to  comply  with  any  such  obligations  or  restrictions  upon  the  direction  of  the 
Company.  In addition to the rights assigned under Section 5, I also assign to the Company (or any of its nominees) all rights which I have or acquired in 
any Developments, full title to which is required to be in the United States under any contract between the Company and the United States or any of its 
agencies.

10)Prior Agreements.  I hereby represent that, except as I have fully disclosed previously in writing to the Company, I am not bound by the terms of any 
agreement with any previous employer or other party to refrain from using or disclosing any trade secret or confidential or proprietary information in the 
course of my employment with the Company or to refrain from competing, directly or indirectly, with the business of such previous employer or any other 
party.    I  further  represent  that  my  performance  of  all  the  terms  of  this  Agreement  as  an  employee  of  the  Company  does  not  and  will  not  breach  any 
agreement to keep in confidence proprietary information, knowledge or data acquired by me in confidence or in trust prior to my employment with the 
Company.  I  will  not  disclose  to  the  Company  or  induce  the  Company  to  use  any  confidential  or  proprietary  information  or  material  belonging  to  any 
previous employer or others. 

11)Remedies Upon Breach.  I understand that the restrictions contained in this Agreement are necessary for the protection of the business and goodwill of 
the  Company  and  I  consider  them  to  be  reasonable  for  such  purpose.    Any  breach  of  this  Agreement  is  likely  to  cause  the  Company  substantial  and 
irrevocable damage and therefore, in the event of such breach, the Company, in addition to such other remedies which may be available, will be entitled to 
specific performance and other injunctive relief.

12)Use  of  Voice,  Image  and  Likeness.    I  give  the  Company  permission  to  use  my  voice,  image  or  likeness,  with  or  without  using  my  name,  for  the 
purposes of advertising and promoting the Company, or for other purposes deemed appropriate by the Company in its reasonable discretion, except to the 
extent expressly prohibited by law.

13)Publications and Public Statements.  I will obtain the Company’s written approval before publishing or submitting for publication any material that 
relates to my work at the Company and/or incorporates any Proprietary Information.  To ensure that the Company delivers a consistent message about its 
products, services and operations to the public, and further in recognition that even positive statements may have a detrimental effect on the Company in 
certain securities transactions and other contexts, any statement about the Company which I create, publish or post during my period of employment and 
for six (6) months thereafter, on any media accessible by the public, including but not limited to electronic bulletin boards and Internet-based chat rooms, 
must first be reviewed and approved by an officer of the Company before it is released in the public domain.

14)No  Employment  Obligation.    I  understand  that  this  Agreement  does  not  create  an  obligation  on  the Company  or  any  other  person  to  continue  my 
employment.  I acknowledge that, unless otherwise agreed in a formal written employment agreement signed on behalf of the Company by an authorized 
officer, my employment with the Company is at will and therefore may be terminated by the Company or me at any time and for any reason.

15)Survival and Assignment by the Company.  I understand that my obligations under this Agreement will continue in accordance with its express terms 
regardless of any changes in my title, position, duties, salary, 

 
 
compensation  or  benefits  or  other  terms  and  conditions  of  employment.  I  further  understand  that  my  obligations  under  this  Agreement  will  continue 
following  the  termination  of  my  employment  regardless  of  the  manner  of  such  termination  and  will  be  binding  upon  my  heirs,  executors  and 
administrators.  The Company will have the right to assign this Agreement to its affiliates, successors and assigns.  I expressly consent to be bound by the 
provisions  of  this  Agreement  for  the  benefit  of  the  Company  or  any  parent,  subsidiary  or  affiliate  to  whose  employ  I  may  be  transferred  without  the 
necessity that this Agreement be resigned at the time of such transfer.

16)Disclosure to Future Employers.  I will provide a copy of this Agreement to any prospective employer, partner or co-venturer prior to entering into an 
employment, partnership or other business relationship with such person or entity.

17)Defend  Trade  Secrets  Act  Notice  of  Immunity  Rights.  I  acknowledge  that  the  Company  has  provided  me  with  the  following  notice  of  immunity 
rights in compliance with the requirements of the Defend Trade Secrets Act: (i) I shall not be held criminally or civilly liable under any Federal or State 
trade secret law for the disclosure of Proprietary Information that is made in confidence to a Federal, State, or local government official or to an attorney 
solely for the purpose of reporting or investigating a suspected violation of law, (ii) I shall not be held criminally or civilly liable under any Federal or State 
trade secret law for the disclosure of Proprietary Information that is made in a complaint or other document filed in a lawsuit or other proceeding, if such 
filing is made under seal and (iii) if I file a lawsuit for retaliation by the Company for reporting a suspected violation of law, I may disclose the Proprietary 
Information to my attorney and use the Proprietary Information in the court proceeding, if I file any document containing the Proprietary Information under 
seal, and do not disclose the Proprietary Information, except pursuant to court order.

18)Exit Interview.  If and when I depart from the Company, I may be required to attend an exit interview and sign an “Employee Exit Acknowledgement” 
to reaffirm my acceptance and acknowledgement of the obligations set forth in this Agreement.  During the Restricted Period following termination of my 
employment, I will notify the Company of any change in my address and of each subsequent employment or business activity, including the name and 
address of my employer or other post-Company employment plans and the nature of my activities.

19)Severability.  In case any provisions (or portions thereof) contained in this Agreement will, for any reason, be held invalid, illegal or unenforceable in 
any respect, such invalidity, illegality or unenforceability will not affect the other provisions of this Agreement, and this Agreement will be construed as if 
such  invalid,  illegal  or  unenforceable  provision  had  never  been  contained  herein.    If,  moreover,  any  one  or  more  of  the  provisions  contained  in  this 
Agreement will for any reason be held to be excessively broad as to duration, geographical scope, activity or subject, it will be construed by limiting and 
reducing it, so as to be enforceable to the extent compatible with the applicable law as it will then appear.

20)Entire Agreement.  This Agreement constitutes the entire and only agreement between the Company and me respecting the subject matter hereof, and 
supersedes all prior agreements and understandings, oral or written, between us concerning such subject matter.  No modification, amendment, waiver or 
termination  of  this  Agreement  or  of  any  provision  hereof  will  be  binding  unless  made  in  writing  and  signed  by  an  authorized  officer  of  the  Company.  
Failure of the Company to insist upon strict compliance with any of the terms, covenants or conditions hereof will not be deemed a waiver of such terms, 
covenants or conditions.  In the event of any inconsistency between this Agreement and any other contract between the Company and me, the provisions of 
this Agreement will prevail.

21)Interpretation.    This  Agreement  will  be  deemed  to  be  made  and  entered  into  in  the  Commonwealth  of  Massachusetts,  and  will  in  all  respects  be 
interpreted, enforced and governed under the laws of the Commonwealth of Massachusetts.  I hereby agree to consent to personal jurisdiction of the state 
and federal courts situated within Suffolk County, Massachusetts for purposes of enforcing this Agreement, and waive any objection that I might have to 
personal jurisdiction or venue in those courts.  As used in this Agreement, “including” means “including but not limited to”.

22)

 
 
 
BY SIGNING BELOW, I CERTIFY THAT I HAVE READ THIS AGREEMENT CAREFULLY AND AM SATISFIED THAT I 

UNDERSTAND IT COMPLETELY.

IN WITNESS WHEREOF, the undersigned has executed this agreement as a sealed instrument as of the date set forth below.

Signed:  __________________________________________________________

    (Employee’s full name)

Type or print name: Paula Cloghessy 

Date: 

__________________

|US-DOCS\64377647.6||

 
 
 
 
 
 
 
 
To:  [________________]

From: 

____________________

Date: 

____________________

SUBJECT:   Prior Inventions

EXHIBIT A

The following is a complete list of all inventions or improvements relevant to the subject matter of my employment by the Company that have been 

made or conceived or first reduced to practice by me alone or jointly with others prior to my engagement by the Company:

(cid:0)  No inventions or improvements

(cid:0) 

See below:

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

(cid:0)  Additional sheets attached

The following is a list of all patents, patent applications and other patent rights that I invented:

(cid:0)  None

(cid:0) 

See below:

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

_______________________________________________________________

|US-DOCS\125170046.2||

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SECOND AMENDMENT TO LOAN AND SECURITY AGREEMENT

Exhibit 10.19

THIS SECOND  AMENDMENT  TO  LOAN  AND  SECURITY  AGREEMENT  (this “Amendment”),  dated  as  of  February  24,  2022  (the 
“Second Amendment Effective Date”), is made by and among Seres Therapeutics, Inc., a Delaware corporation, and each of its Subsidiaries from time to 
time party to the Loan Agreement (individually or collectively, as the context may require, “Borrower”), the several banks and other financial institutions 
or entities from time to time parties to the Loan Agreement (each, a “Lender”, and collectively, the “Lenders”) and Hercules Capital, Inc., a Maryland 
corporation, in its capacity as administrative agent and collateral agent for the Lenders (in such capacity, together with its successors and assigns in such 
capacity, “Agent”).

Borrower,  the  Lenders  and  Agent  are  parties  to  a  Loan  and  Security  Agreement  dated  as  of  October  29,  2019  (and  as  amended,  restated  or 
modified from time to time, the “Loan and Security Agreement”). Borrower has requested that the Lenders agree to certain amendments to the Loan 
and Security Agreement. The Lenders have agreed to such request, subject to the terms and conditions hereof.

Accordingly, the parties hereto agree as follows:

1.  Definitions; Interpretation.

(a)

Terms Defined in Loan and Security Agreement. All capitalized terms used in this Amendment (including in the recitals hereof) 

and not otherwise defined herein shall have the meanings assigned to them in the Loan and Security Agreement.

(b)

Interpretation. The rules of interpretation set forth in the last paragraph of Section 1.1 of the Loan and Security Agreement shall be 

applicable to this Amendment and are incorporated herein by this reference.

2.  Amendments  to  the  Loan  and  Security  Agreement .  The  Loan  and  Security  Agreement  (including  the  specific  schedules  and  exhibits  attached 
thereto)  is  hereby  amended  to  delete  the  stricken  text  (indicated  textually  in  the  same  manner  as  the  following  example:  stricken text)  and  to  add  the 
double-underlined text (indicated textually in the same manner as the following example: double-underlined text) as set forth in the pages of the agreement 
attached as Exhibit A hereto. Each reference in the Loan and Security Agreement to “this Agreement” and the words “hereof,” “herein,” “hereunder,” or 
words of like import, shall mean and be a reference to the Loan and Security Agreement as amended by this Amendment.

SECTION  3  Conditions  of  Effectiveness.  The  effectiveness  of  Section  2  of  this  Amendment  shall  be  subject  to    the  satisfaction  of  each  of  the 
following conditions precedent:

(a)

Fees  and  Expenses.  Borrower  shall  have  paid  (i)  invoiced  out-of-pocket  costs  and  expenses  of  Agent  and  Lenders,  the  fees  and 
disbursements of counsel to Agent and Lenders, in connection with the negotiation, preparation, execution and delivery of this Amendment and any other 
documents to be delivered in connection herewith, and (ii) all other invoiced fees, costs and expenses, due and payable as of the Second Amendment 
Effective Date under the Loan and Security Agreement (including the Second Amendment Date Facility Charge).

(b)

(c)

This Amendment. Agent shall have received this Amendment, duly executed by Agent, the Lenders and Borrower; and

Board Resolutions.  Agent shall have received a copy of resolutions of Borrower’s Board evidencing approval of this Amendment 

and the additional Term Loan Advances permitted thereunder.

(d)

Representations and Warranties; No Default. On the Amendment Effective Date, after giving effect to the amendment of the Loan 

and Security Agreement contemplated hereby: 

Effective Date as though made on and as of such date; 

(i)

The representations and warranties contained in Section 4 shall be true and correct on and as of the Amendment 

(ii)

The copy of the resolutions of Borrower’s Board approving this Amendment and the additional Term 

263015802 v6

 
 
Loan Advances permitted thereunder is true and correct and which resolutions are in full force and effect, without amendment, modification or rescission, 
on the date hereof; and

(iii)

There exist no Events of Default or events that with the passage of time would result in an Event of Default.

SECTION 4  Representations and Warranties. To induce the Lenders to enter into this Amendment, Borrower hereby confirms, after giving effect to 
this  Amendment,  (a)  that  the  representations  and  warranties  made  by  it  in  Section  5  of  the  Loan  and  Security  Agreement  and  in  the  other  Loan 
Documents are true and correct in all material respects, except to the extent such representations and warranties expressly relate to an earlier date; and (b) 
that  there  has  not  been  and  there  does  not  exist  a  Material  Adverse  Effect;  and  (c)  the  execution,  delivery  and  performance  of  this  Amendment  by 
Borrower (i) will not result in the creation or imposition of any Lien upon the Collateral, other than Permitted Liens, (ii) will not violate any provisions of 
Borrower’s Organizational Documents or any law, regulation, order, injunction, judgment, decree or writ to which Borrower is subject in any material 
respect, and (iii) will not violate any material contract or agreement or require the consent or approval of any other Person which has not already been 
obtained.  For  the  purposes  of  this  Section  4,  each  reference  in  Section  5  of  the  Loan  and  Security  Agreement  to  “this  Agreement,”  and  the  words 
“hereof,” “herein,” “hereunder,” or words of like import in such Section, shall mean and be a reference to the Loan and Security Agreement as amended 
by this Amendment.

SECTION 5  Miscellaneous.

(a)

Loan Documents Otherwise Not Affected; Reaffirmation; No Novation.

(i)

Except as expressly amended pursuant hereto or referenced herein, the Loan and Security Agreement and the 
other  Loan  Documents  shall  remain  unchanged  and  in  full  force  and  effect  and  are  hereby  ratified  and  confirmed  in  all  respects.  The  Lenders’  and 
Agent’s execution and delivery of, or acceptance of, this Amendment shall not be deemed to create a course of dealing or otherwise create any express or 
implied duty by any of them to provide any other or further amendments, consents or waivers in the future.

(ii)

Borrower  hereby  expressly  (1)  reaffirms,  ratifies  and  confirms  its  obligations  under  the  Loan  and  Security 
Agreement  and  the  other  Loan  Documents,  (2)  reaffirms,  ratifies  and  confirms  the  grant  of  security  under  Section  3.1  of  the  Loan  and  Security 
Agreement, (3) reaffirms that such grant of security in the Collateral secures all Secured Obligations under the Loan and Security Agreement, and with 
effect  from  (and  including)  the  Second  Amendment  Effective  Date,  such  grant  of  security  in  the  Collateral:  (x)  remains  in  full  force  and  effect 
notwithstanding  the  amendments  expressly  referenced  herein;  and  (y)  secures  all  Secured  Obligations  under  the  Loan  and  Security  Agreement,  as 
amended by this Amendment, and the other Loan Documents, (4) agrees that this Amendment shall be a “Loan Document” under the Loan and Security 
Agreement and (5) agrees that the Loan and Security Agreement and each other Loan Document shall remain in full force and effect following any action 
contemplated in connection herewith.

(iii)

This Amendment is not a novation and the terms and conditions of this Amendment shall be in addition to and 
supplemental to all terms and conditions set forth in the Loan Documents. Nothing in this Amendment is intended, or shall be construed, to constitute an 
accord and satisfaction of Borrower’s Secured Obligations under or in connection with the Loan and Security Agreement and any other Loan Document 
or to modify, affect or impair the perfection or continuity of Agent’s security interest in, (on behalf of itself and the Lenders) security titles to or other 
liens on any Collateral for the Secured Obligations.

(b)

Conditions.  For  purposes  of  determining  compliance  with  the  conditions  specified  in  Section  3,  each  Lender  that  has  signed  this 
Amendment shall be deemed to have consented to, approved or accepted or to be satisfied with, each document or other matter required thereunder to be 
consented to or approved by or acceptable or satisfactory to a Lender unless Agent shall have received notice from such Lender prior to the Amendment 
Effective Date specifying its objection thereto.

(c)

Release.  In  consideration  of  the  agreements  of  Agent  and  each  Lender  contained  herein  and  for  other  good  and  valuable 
consideration, the receipt and sufficiency of which are hereby acknowledged, Borrower, on behalf of itself and its successors, assigns, and other legal 
representatives, hereby fully, absolutely, unconditionally and irrevocably 

263015802 v6

 
 
 
releases,  remises  and  forever  discharges  Agent  and  each  Lender,  and  its  successors  and  assigns,  and  its  present  and  former  shareholders,  affiliates, 
subsidiaries, divisions, predecessors, directors, officers, attorneys, employees, agents and other representatives (Agent, Lenders and all such other persons 
being hereinafter referred to collectively as the “Releasees” and individually as a “Releasee”), of and from all demands, actions, causes of action, suits, 
covenants,  contracts,  controversies,  agreements,  promises,  sums  of  money,  accounts,  bills,  reckonings,  damages  and  any  and  all  other  claims, 
counterclaims, defenses, rights of set-off, demands and liabilities whatsoever of every name and nature, known or unknown, suspected or unsuspected, 
both at law and in equity, which Borrower, or any of its successors, assigns, or other legal representatives may now or hereafter own, hold, have or claim 
to have against the Releasees or any of them for, upon, or by reason of any circumstance, action, cause or thing whatsoever which arises at any time on or 
prior to the day and date of this Amendment for or on account of, or in relation to, or in any way in connection with the Loan and Security Agreement, or 
any of the other Loan Documents or transactions thereunder or related thereto. Borrower waives the provisions of California Civil Code section 1542, 
which states: 

A  GENERAL  RELEASE  DOES  NOT  EXTEND  TO  CLAIMS  THAT  THE  CREDITOR  OR  RELEASING  PARTY 
DOES NOT KNOW OR SUSPECT TO EXIST IN HIS OR HER FAVOR AT THE TIME OF EXECUTING THE RELEASE 
AND  THAT,  IF  KNOWN  BY  HIM  OR  HER,  WOULD  HAVE  MATERIALLY  AFFECTED  HIS  OR  HER  SETTLEMENT 
WITH THE DEBTOR OR RELEASED PARTY.

Borrower understands, acknowledges and agrees that the release set forth above may be pleaded as a full and complete defense and may be used as a 
basis for an injunction against any action, suit or other proceeding which may be instituted, prosecuted or attempted in breach of the provisions of such 
release. Borrower agrees that no fact, event, circumstance, evidence or transaction which could now be asserted or which may hereafter be discovered 
shall affect in any manner the final, absolute and unconditional nature of the release set forth above.

(d)

No Reliance. Borrower hereby acknowledges and confirms to Agent and the Lenders that Borrower is executing this Amendment on 
the basis of its own investigation and for its own reasons without reliance upon any agreement, representation, understanding or communication by or on 
behalf of any other Person.

(e)

Binding Effect. This Amendment binds and is for the benefit of the successors and permitted assigns of each party.

(f)

Governing Law. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER SHALL IN 
ALL RESPECTS BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF CALIFORNIA 
(WITHOUT REGARD TO THE CONFLICT OF LAWS PRINCIPLES THAT WOULD RESULT IN THE APPLICATION OF ANY LAWS OTHER 
THAN THE LAWS OF THE STATE OF CALIFORNIA), INCLUDING ALL MATTERS OF CONSTRUCTION, VALIDITY AND PERFORMANCE, 
REGARDLESS OF THE LOCATION OF THE COLLATERAL.

(g)

Complete Agreement; Amendments. This Amendment and the Loan Documents represent the entire agreement about this subject 
matter  and  supersede  prior  negotiations  or  agreements  with  respect  to  such  subject  matter.  All  prior  agreements,  understandings,  representations, 
warranties, and negotiations between the parties about the subject matter of this Amendment and the Loan Documents merge into this Amendment and 
the Loan Documents.

(h)

Severability  of  Provisions.  Each  provision  of  this  Amendment  is  severable  from  every  other  provision  in  determining  the 

enforceability of any provision.

(i)

Counterparts. This Amendment may be executed in any number of counterparts and by different parties on separate counterparts, 
each of which, when executed and delivered, is an original, and all taken together, constitute one Amendment. Delivery of an executed counterpart of a 
signature  page  of  this  Amendment  by  facsimile,  portable  document  format  (.pdf)  or  other  electronic  transmission  will  be  as  effective  as  delivery  of  a 
manually executed counterpart hereof.

(j)

Loan Documents. This Amendment and the documents related thereto shall constitute Loan Documents.

[Balance of Page Intentionally Left Blank; Signature Pages Follow]

263015802 v6

 
 
 
 
[SIGNATURE PAGE TO SECOND AMENDMENT TO LOAN AND SECURITY AGREEMENT]

IN WITNESS WHEREOF, the parties hereto have duly executed this Amendment, as of the date first above written.

BORROWER:

SERES THERAPEUTICS, INC.

By: /s/ Eric D. Shaff 
Name: Eric D. Shaff
Title: President & CEO

263015802 v6

 
 
 
 
 
[SIGNATURE PAGE TO SECOND AMENDMENT TO LOAN AND SECURITY AGREEMENT]

AGENT:

HERCULES CAPITAL, INC.

By: /s/ Jennifer Choe 
Name: Jennifer Choe
Title: Associate General Counsel

LENDERS:

HERCULES CAPITAL, INC.

By: /s/ Jennifer Choe 
Name: Jennifer Choe
Title: Associate General Counsel

HERCULES PRIVATE GLOBAL VENTURE GROWTH FUND I L.P. 

By:       Hercules Private Global Venture Growth Fund GP I LLC, its general partner 

By:      Hercules Adviser LLC, its sole member

263015802 v6

By: /s/ Seth Meyer   
Name: Seth Meyer
Title:  Authorized Signatory

 
 
 
 
 
 
EXHIBIT A
AMENDED LOAN AND SECURITY AGREEMENT

263015802 v6

 
 
 
 
Conformed through Second Amendment to Loan and Security Agreement

LOAN AND SECURITY AGREEMENT

THIS  LOAN  AND  SECURITY  AGREEMENT  is  made  and  dated  as  of  October  29,  2019  and  is  entered  into  by  and  among  SERES 
THERAPEUTICS, INC., a Delaware corporation, each of its Subsidiaries from time to time party hereto as borrower (individually or collectively, as the 
context may require, “Borrower”), and the several banks and other financial institutions or entities from time to time parties to this Agreement (each, a 
“Lender”, and collectively “Lenders”)  and  HERCULES  CAPITAL,  INC.,  a  Maryland  corporation,  in  its  capacity  as  administrative  agent  and  collateral 
agent for Lenders (in such capacity, “Agent”).

A.

Borrower has requested Lenders to make available to Borrower one or more Advances in an aggregate principal amount of up to 

$50,000,000100,000,000; and

B.

Lenders are willing to make such Advances on the terms and conditions set forth in this Agreement.

RECITALS

NOW, THEREFORE, Borrower, Agent and Lenders agree as follows:

AGREEMENT

1.
DEFINITIONS AND RULES OF CONSTRUCTION

a.

Unless otherwise defined herein, the following capitalized terms shall have the following meanings:

“Account Control Agreement(s)” means any agreement entered into by and among Agent, Borrower and a third party bank or other institution 
(including  a  Securities  Intermediary)  in  which  Borrower  maintains  a  Deposit  Account  or  an  account  holding  Investment  Property  and  which  perfects 
Agent’s first priority security interest in the subject account or accounts.

“ACH Authorization” means the ACH Debit Authorization Agreement in substantially the form of Exhibit G,  provided  that  account  numbers 

shall be redacted for security purposes if and when filed publicly by Borrower.

“Advance” means a Term Loan Advance.

“Advance Date” means the funding date of any Advance.

“Advance Request”  means  a  request  for  an  Advance  submitted  by  Borrower  to  Agent  in  substantially  the  form  of  Exhibit  A,  provided  that 

account numbers shall be redacted for security purposes if and when filed publicly by Borrower.

“Affiliate” means (a) any Person that directly or indirectly controls, is controlled by, or is under common control with the Person in question, (b) 
any Person directly or indirectly owning, controlling or holding with power to vote twenty percent (20%) or more of the outstanding voting securities of 
another Person, or (c) any Person twenty percent (20%) or more of whose outstanding voting securities are directly or indirectly owned, controlled or held 
by  another  Person  with  power  to  vote  such  securities.    As  used  in  the  definition  of  “Affiliate,”  the  term  “control”  means  the  possession,  directly  or 
indirectly, of the power to direct or cause the direction of the management and policies of a Person, whether through ownership of voting securities, by 
contract or otherwise.  

“Agreement” means this Loan and Security Agreement, as amended, restated, supplemented or otherwise modified from time to time.

“Amortization  Date”  means  DecemberJanuary  1,  20212024,  provided  however,  if  as  of  such  date  the  Interest  Only  Extension  Condition  is 

satisfied, then JuneJanuary 1, 20222025.

212788652 v9 

263757953 v7

 
“Anti-Corruption Laws” means all laws, rules, and regulations of any jurisdiction applicable to Borrower or any of their respective Affiliates 
from time to time concerning or relating to bribery or corruption, including without limitation the United States Foreign Corrupt Practices Act of 1977, as 
amended, the UK Bribery Act 2010 and other similar legislation in any other jurisdictions.

“Anti‑Terrorism  Laws”  means  any  laws,  rules,  regulations  or  orders  relating  to  terrorism  or  money  laundering,  including  without  limitation 
Executive Order No. 13224 (effective September 24, 2001), the USA PATRIOT Act, the laws comprising or implementing the Bank Secrecy Act, and the 
laws administered by OFAC.

“Biologics License Application” means an application for licensure of a biological product submitted to the FDA under 42 U.S.C. § 262 and 21 

C.F.R. § 601.2 for permission to introduce, or deliver for introduction, a biologic product into interstate commerce.

“Blocked Person” means any Person:  (a) listed in the annex to, or is otherwise subject to the provisions of, Executive Order No. 13224, (b) a 
Person owned or controlled by, or acting for or on behalf of, any Person that is listed in the annex to, or is otherwise subject to the provisions of, Executive 
Order No. 13224, (c) a Person with which any Lender is prohibited from dealing or otherwise engaging in any transaction by any Anti-Terrorism Law, (d) a 
Person that commits, threatens or conspires to commit or supports “terrorism” as defined in Executive Order No. 13224, or (e) a Person that is named a 
“specially designated national” or “blocked person” on the most current list published by OFAC or other similar list.

“Board”  means,  with  respect  to  any  Person  that  is  a  corporation,  its  board  of  directors,  with  respect  to  any  Person  that  is  a  limited  liability 
company, its board of managers, board of members or similar governing body, and with respect to any other Person that is a legal entity, such Person’s 
governing body in accordance with its Organizational Documents.

“Business Day” means any day other than Saturday, Sunday and any other day on which banking institutions in the State of California are closed 

for business.“CARES Act” means the Coronavirus Aid, Relief and Economic Stability Act.

“Cash” means all cash, cash equivalents and liquid funds.

“CFC” means a controlled foreign corporation within the meaning of Section 957(a) of the Code.

“Change in Control” means any reorganization, recapitalization, consolidation or merger (or similar transaction or series of related transactions) 
of Borrower, sale or exchange of outstanding shares (or similar transaction or series of related transactions) of Borrower in which the holders of Borrower’s 
outstanding shares immediately before consummation of such transaction or series of related transactions do not, immediately after consummation of such 
transaction or series of related transactions, retain shares representing more than fifty percent (50%) of the voting power of the surviving entity of such 
transaction or series of related transactions (or the parent of such surviving entity if such surviving entity is wholly owned by such parent), in each case 
without regard to whether Borrower is the surviving entity.

“Charter” means, with respect to any Person, such Person’s incorporation, formation or equivalent documents, as in effect from time to time.

“Closing Date” means the date of this Agreement.

“Code” means the Internal Revenue Code of 1986, as amended. 

“Compliance Certificate” means a certificate in the form attached hereto as Exhibit DE.

“Contingent Obligation” means, as applied to any Person, any direct or indirect liability, contingent or otherwise, of that Person with respect to 

(i) any Indebtedness, lease, dividend, letter of credit or other obligation of 

212788652 v9 

263757953 v7

2

 
 
another, including any such obligation directly or indirectly guaranteed, endorsed, co-made or discounted or sold with recourse by that Person, or in respect 
of  which  that  Person  is  otherwise  directly  or  indirectly  liable;  (ii)  any  obligations  with  respect  to  undrawn  letters  of  credit,  corporate  credit  cards  or 
merchant services issued for the account of that Person; and (iii) all obligations arising under any interest rate, currency or commodity swap agreement, 
interest rate cap agreement, interest rate collar agreement, or other agreement or arrangement designated to protect a Person against fluctuation in interest 
rates,  currency  exchange  rates  or  commodity  prices;  provided,  however,  that  the  term  “Contingent  Obligation”  shall  not  include  endorsements  for 
collection or deposit in the ordinary course of business.  The amount of any Contingent Obligation shall be deemed, without duplication of the primary 
obligation, to be an amount equal to the stated or determined amount of the primary obligation in respect of which such Contingent Obligation is made or, 
if  not  stated  or  determinable,  the  maximum  reasonably  anticipated  liability  in  respect  thereof  as  determined  by  such  Person  in  good  faith;  provided, 
however, that such amount shall not in any event exceed the maximum amount of the obligations under the guarantee or other support arrangement.  For 
the avoidance of doubt, no Permitted Bond Hedge Transaction or Permitted Warrant Transaction will be considered a Contingent Obligation of Borrower.

“Copyright License” means any written agreement granting any right to use any Copyright or Copyright registration, now owned or hereafter 

acquired by Borrower or in which Borrower now holds or hereafter acquires any interest.

“Copyrights”  means  all  copyrights,  whether  registered  or  unregistered,  held  pursuant  to  the  laws  of  the  United  States  of  America,  any  State 

thereof, or of any other country.

“Deposit Accounts” means any “deposit accounts,” as such term is defined in the UCC, and includes any checking account, savings account, or 

certificate of deposit.

“Domestic  Subsidiary”  means  any  Subsidiary  organized  under  the  laws  of  the  United  States  of  America,  any  State  thereof,  the  District  of 

Columbia, or any other jurisdiction within the United States of America.  

“Due Diligence Fee” means $25,000, which fee has been paid to Agent prior to the Closing Date, and shall be deemed fully earned on such date 

regardless of the early termination of this Agreement.

“Equity Interests” means, with respect to any Person, the capital stock, partnership or limited liability company interest, or other equity securities 

or equity ownership interests of such Person.

“ERISA” means the Employee Retirement Income Security Act of 1974, as amended, and the regulations promulgated thereunder.

“Excluded Account”  means  any  of  the  following  accounts  which  are  designated  as  such  in  writing  to Agent  as  of  the  Closing  Date  or,  with 
respect to any account opened after the Closing Date, in the next Compliance Certificate delivered after such account is opened: (i) accounts held by the 
MSC Subsidiary, (ii) accounts used exclusively to maintain cash collateral subject to a Permitted Lien, (iii) any payroll or benefits account, provided that 
the aggregate balance of all such accounts shall not exceed the amount of all payroll or related benefit payments required to be made in the two next payroll 
periods, and (iv) any zero balance account. 

“Excluded Subsidiaries” means all Foreign Subsidiaries, Foreign Subsidiary Holding Companies and the MSC Subsidiary.  

“Extension  Condition”  means  satisfaction  of  each  of  the  following  events:  (a)  no  default  or  Event  of  Default  shall  have  occurred  and  be 

continuing and (b) the Regulatory Approval Milestone shall have been met.

“FDA” means the U.S. Food and Drug Administration or any successor thereto or any other comparable governmental authority.

212788652 v9 

263757953 v7

3

 
 
“First Amendment” means that certain First Amendment to Loan and Security Agreement, dated as of the First Amendment Date, by and among 

Borrower, the Lenders and Agent.

“First Amendment Date” means April 24, 2020.

“Foreign Subsidiary” means a Subsidiary other than a Domestic Subsidiary. 

“Foreign Subsidiary Holding Company” means any Domestic Subsidiary that owns (directly or indirectly) no material assets other than Equity 

Interests (or Equity Interests and debt interests) of one or more (a) CFCs or (b) other Foreign Subsidiary Holding Companies.

“GAAP” means generally accepted accounting principles in the United States of America, as in effect from time to time.

“Guarantor” means any subsidiary of Borrower that enters into a Guaranty.

“Guaranty” means a guaranty with respect to the Secured Obligations, in form and substance satisfactory to Agent.

“Indebtedness” means indebtedness of any kind, including (a) all indebtedness for borrowed money or the deferred purchase price of property or 
services (excluding trade credit entered into in the ordinary course of business), including reimbursement and other obligations with respect to surety bonds 
and letters of credit, (b) all obligations evidenced by notes, bonds, debentures or similar instruments, (c) all capital lease obligations, (d) equity securities of 
any  Person  subject  to  repurchase  or  redemption  other  than  at  the  sole  option  of  such  Person,  (e)  “earnouts”,  purchase  price  adjustments,  profit  sharing 
arrangements, deferred purchase money amounts and similar payment obligations or continuing obligations of any nature arising out of purchase and sale 
contracts, (f) non-contingent obligations to reimburse any bank or Person in respect of amounts paid under a letter of credit, banker’s acceptance or similar 
instrument, and (g) all Contingent Obligations.  

“Initial Facility Charge” means a charge of $375,000.  

“Intellectual  Property”  means  all  of  Borrower’s  Copyrights;  Trademarks;  Patents;  Licenses;  trade  secrets  and  inventions;  mask  works; 
Borrower’s applications therefor and reissues, extensions, or renewals thereof; and Borrower’s goodwill associated with any of the foregoing, together with 
Borrower’s rights to sue for past, present and future infringement of Intellectual Property and the goodwill associated therewith.

“Interest Only Extension Condition” means satisfaction of each of the following events: (a) no default or Event of Default shall have occurred 

and be continuing and (b) Performance Milestone I and Performance Milestone II shall have been met.

“Investment” means any beneficial ownership (including stock, partnership interests, limited liability company interests or other securities) of or 
in any Person, or any loan, advance or capital contribution to any Person or the acquisition of any capital asset of another Person not in the ordinary course 
of Borrower’s business.

“IRS” means the United States Internal Revenue Service. 

“Joinder Agreements” means for each Subsidiary (other than Excluded Subsidiaries and the MSC Subsidiary), a completed and executed Joinder 

Agreement in substantially the form attached hereto as Exhibit G.

“License” means any Copyright License, Patent License, Trademark License or other Intellectual Property license of rights or interests.

“Lien” means any mortgage, deed of trust, pledge, hypothecation, assignment for security, security interest, encumbrance, levy, lien or charge of 

any kind, whether voluntarily incurred or arising by operation of law or otherwise, 

212788652 v9 

263757953 v7

4

 
 
against any property, any conditional sale or other title retention agreement, and any lease in the nature of a security interest.

“Loan” means the Advances made under this Agreement.

“Loan  Documents”  means  this  Agreement,  Pledge  Agreement,  the  promissory  notes  (if  any),  the  ACH  Authorization,  the  Account  Control 
Agreements, any Joinder Agreements, all UCC Financing Statements, the Guaranty (if any), the Perfection Certificate, and any other documents executed 
in  connection  with  the  Secured  Obligations  or  the  transactions  contemplated  hereby,  as  the  same  may  from  time  to  time  be  amended,  modified, 
supplemented or restated.

“Loan Party” means Borrower or any Guarantor. 

“Market Capitalization” means, for any given date of determination, an amount equal to (a) the average of the daily volume weighted average 
price  of  Borrower’s  common  stock  as  reported  for  each  of  the  five  (5)  trading  days  preceding  such  date  of  determination  (it  being  understood  that  a 
“trading day” shall mean a day on which shares of Borrower’s common stock trade on the NASDAQ (or, if the primary listing of such common stock is on 
another  exchange,  on  such  other  exchange)  in  an  ordinary  trading  session)  multiplied  by  (b)  the  total  number  of  issued  and  outstanding  shares  of 
Borrower’s common stock that are issued and outstanding on the date of the determination and listed on the NASDAQ (or, if the primary listing of such 
common stock is on another exchange, on such other exchange), subject to appropriate adjustment for any stock dividend, stock split, stock combination, 
reclassification or other similar transaction during the applicable calculation period.

“Material Adverse Effect” means a material adverse effect upon: (i) the business, operations, properties, assets or financial condition of Borrower 
and its Subsidiaries taken as a whole; or (ii) the ability of Borrower to perform or pay the Secured Obligations in accordance with the terms of the Loan 
Documents, or the ability of Agent or Lenders to enforce any of its rights or remedies with respect to the Secured Obligations; or (iii) the Collateral or 
Agent’s Liens on the Collateral or the priority of such Liens.  

“Material  Intellectual  Property”  means  all  Intellectual  Property  the  loss  of  which  could  reasonably  be  expected  to  have  a  Material  Adverse 
Effect, provided that, for the avoidance of doubt, Intellectual Property related to SER109, 287, 301, and 401, including any indication that Borrower is 
pursuing as of the Closing Date.

“Maximum Term Loan Amount” means FiftyOne Hundred Million Dollars ($50,000,000.00100,000,000). 

“MSC Investment Conditions” means that Borrower maintains Unrestricted Cash in an amount equal to or greater than 110% of the aggregate 
outstanding Secured Obligations (inclusive of any Prepayment Charge and End of Term Charge that would be due and owing if the outstanding Loans were 
prepaid at the time of measurement).

“MSC  Subsidiary”  means  Seres  Therapeutics  Securities  Corporation,  a  wholly-owned  Subsidiary  incorporated  in  the  Commonwealth  of 
Massachusetts or the State of Delaware for the purpose of holding Investments as a Massachusetts security corporation under 830 CMR 63.38B.1 of the 
Massachusetts tax code and applicable regulations (as the same may be amended, modified or replaced from time to time).

“Nestle License Agreement (2021)” means that certain License Agreement, dated July 1, 2021, between Borrower and NHSc Pharma Partners, 

as in effect as of the Second Amendment Effective Date.

“Non-Disclosure Agreement”  means  that  certain  Non-Disclosure  Agreement/Confidentiality  Agreement  by  and  between  Borrower  and  Agent 

dated as of August 14, 2019.

“OFAC” means the U.S. Department of Treasury Office of Foreign Assets Control.

“OFAC Lists”  means,  collectively,  the  Specially  Designated  Nationals  and  Blocked  Persons  List  maintained  by  OFAC  pursuant  to  Executive 

Order No. 13224, 66 Fed. Reg. 49079 (Sept. 25, 2001) and/or any other list of 

212788652 v9 

263757953 v7

5

 
 
terrorists or other restricted Persons maintained pursuant to any of the rules and regulations of OFAC or pursuant to any other applicable Executive Orders.

“Organizational Documents” means with respect to any Person, such Person’s Charter, and (a) if such Person is a corporation, its bylaws, (b) if 
such  Person  is  a  limited  liability  company,  its  limited  liability  company  agreement  (or  similar  agreement),  and  (c)  if  such  Person  is  a  partnership,  its 
partnership agreement (or similar agreement), each of the foregoing with all current amendments or modifications thereto.

“Patent License”  means  any  written  agreement  granting  any  right  with  respect  to  any  invention  on  which  a  Patent  is  in  existence  or  a  Patent 

application is pending, in which agreement Borrower now holds or hereafter acquires any interest.

“Patents” means all letters patent of, or rights corresponding thereto, in the United States of America or in any other country, all registrations and 

recordings thereof, and all applications for letters patent of, or rights corresponding thereto, in the United States of America or any other country.

“Perfection Certificate” means that certain Perfection Certificate delivered by Borrower to Agent on the Second Amendment Effective Date. 

“Performance Milestone I” means no later than June 30, 2020, Borrower shall have announced that Borrower’s Phase 3 ECOSPOR III trial has 
achieved the protocol-specified primary efficacy endpoint of statistically significant improvement in recurrence of C. difficile infection up to 8 weeks after 
treatment,  which  supports  the  filing  of  a  Biologics  License  Application  with  the  FDA  seeking  regulatory  approval  of  a  Product  for  the  treatment  of  C. 
difficile infection as the next clinical step.   

“Performance  Milestone  II”  means  no  later  than  October  31,  2020  (or,  if  (i)  Performance  Milestone  I  has  been  achieved  or  (ii)  Borrower 
maintains Unrestricted Cash in an amount not less than $20,000,000 at all times from October 31, 2020 until the earlier of (x) December 31, 2020 or (y) the 
date this Performance Milestone II is met, no later than December 31, 2020), Borrower shall have announced that Borrower’s Phase 2b ECORESET trial 
has achieved the protocol-specified primary efficacy endpoint of a statistically significant improvement in clinical remission after 10 weeks of induction 
dosing and demonstrates an approvable safety profile, which together shall be sufficient to qualify as “pivotal” data for one of two pivotal studies necessary 
for the filing of the Biologics License Application to the FDA seeking regulatory approval of a Product for the treatment of mild-to-moderate ulcerative 
colitis.

“Permitted Acquisition” means any acquisition (including without limitation by way of merger or in-licensing arrangement) by Borrower of all 
or  substantially  all  of  the  assets  of  another  Person,  or  of  a  division  or  line  of  business  of  another  Person,  or  capital  stock  of  another  Person,  which  is 
conducted in accordance with the following requirements: 

1.

such acquisition is of a business or Person engaged in a line of business substantially related to that of Borrower or its Subsidiaries;

2.

if such acquisition is structured as a stock acquisition, then the Person so acquired shall either (i) become a wholly-owned Subsidiary 
of  Borrower  or  of  a  Subsidiary  and  Borrower  shall  comply,  or  cause  such  Subsidiary  to  comply,  with  Section 7.13  hereof  or  (ii)  such  Person  shall  be 
merged with and into Borrower (with Borrower being the surviving entity);

3.

if such acquisition is structured as the acquisition of assets, such assets shall be acquired by Borrower, and shall be free and clear of 

Liens other than Permitted Liens;

4.

Borrower shall have delivered to Lenders not less than seven (7) nor more than twenty (20) days prior to the date of such acquisition, 
notice  of  such  acquisition  together  with  pro  forma  projected  financial  information,  copies  of  all  material  documents  relating  to  such  acquisition,  and 
historical financial statements for such acquired entity, 

212788652 v9 

263757953 v7

6

 
 
division  or  line  of  business  (to  the  extent  applicable),  in  each  case  in  form  reasonably  satisfactory  to  Lenders  and  demonstrating  compliance  with  the 
covenants set forth in Section 7.19 hereof on a pro forma basis as if the acquisition occurred on the first day of the most recent measurement period;

5.

both immediately before and after such acquisition no default or Event of Default shall have occurred and be continuing; and

6.

the  sum  of  the  purchase  price  of  such  proposed  new  acquisition,  computed  on  the  basis  of  total  acquisition  consideration  paid  or 
incurred,  or  to  be  paid  or  incurred,  by  Borrower  with  respect  thereto,  including  any  contingent  or  deferred  acquisition  consideration,  and  including  the 
amount of Permitted Indebtedness assumed or to which such assets, businesses or business or ownership interest or shares, or any Person so acquired, is 
subject, shall not be greater than (i) $2,500,0007,500,000 in cash for any single acquisition or group of related acquisitions or (ii) $5,000,00015,000,000 in 
for  all  such  acquisitions  during  the  term  of  this  Agreement;  provided  that  acquisition  consideration  funded  by  proceeds  from  the  sale  and  issuance  of 
Borrower’s Equity Interests in a transaction not resulting in a Change in Control, which sale and issuance has a primary purpose to fund such acquisition, 
and which sale and issuance is consummated substantially contemporaneously with (and in any event, prior to, but no more fifteen (15) days prior to) the 
consummation of such acquisition, shall be disregarded in determining compliance with this clause (f), provided further, that for any acquisition in which 
the consideration consists solely of Equity Interests of Borrower, the value of such Equity Interests shall be disregarded in determining compliance with 
this clause (f). 

“Permitted  Bond  Hedge  Transaction”  means  any  call  or  capped  call  option  (or  substantively  equivalent  derivative  transaction)  relating  to 
Borrower’s  common  stock  (or  other  securities  or  property  following  a  merger  event  or  other  change  of  the  common  stock  of  Borrower)  purchased  by 
Borrower in connection with the issuance of any Permitted Convertible Debt.

“Permitted Convertible Debt” means Indebtedness that is convertible into a fixed number (subject to customary anti-dilution adjustments, “make-
whole” increases and other customary changes thereto) of shares of common stock of Borrower (or other securities or property following a merger event or 
other  change  of  the  common  stock  of  Borrower),  cash  or  any  combination  thereof  (with  the  amount  of  such  cash  or  such  combination  determined  by 
reference  to  the  market  price  of  such  common  stock  or  such  other  securities);  provided  that  such  Indebtedness  shall  (a)  not  require  any  scheduled 
amortization or otherwise required payment of principal prior to, or have a scheduled maturity date, earlier than, one hundred eighty (180) days after the 
Term  Loan  Maturity  Date,  (b)  be  unsecured,  (c)  not  be  guaranteed  by  any  Subsidiary  of  Borrower  that  is  not  also  a  Loan  Party,  and  (d)  shall  be 
Indebtedness of Seres Therapeutics, Inc. and not any Subsidiary thereof.  

“Permitted Indebtedness” means: 

1.

2.

Indebtedness of Borrower in favor of any Lender or Agent arising under this Agreement or any other Loan Document;

Indebtedness existing on the Closing Date which is disclosed in Schedule 1A;

3.

Indebtedness  of  up  to  $500,0001,500,000  outstanding  at  any  time  secured  by  a  Lien  described  in  clause  (g)  of  the  defined  term 
“Permitted Liens”, provided such Indebtedness does not exceed the cost of the Equipment or software or other intellectual property financed with such 
Indebtedness;

4.

(i) Indebtedness to trade creditors incurred in the ordinary course of business and (ii) Indebtedness incurred in the ordinary course of 

business with corporate credit cards in an aggregate amount not to exceed $500,0001,500,000 outstanding at any time;

Indebtedness that also constitutes a Permitted Investment or is secured by a Permitted Lien;

Subordinated Indebtedness;

7

5.

6.

212788652 v9 

263757953 v7

 
 
7.

reimbursement obligations in connection with letters of credit (i) that are unsecured and issued in the ordinary of business and (ii) that 

are secured by Cash and issued on behalf of Borrower or a Subsidiary in an amount not to exceed $3,000,00015,000,000 at any time outstanding;

8.

Indebtedness  consisting  of  a  loan  under  the  Paycheck  Protection  Program  of  the  CARES  Act  provided  that  (i)  such  loan  shall  be 
unsecured and shall not contain any terms or conditions that are adverse to Agent’s and the Lenders’ rights under this Agreement, including with respect to 
collateral,  priority,  preference  and  repayment  terms,  (ii)  such  loan  shall  be  subject  to  Agent’s  written  approval  in  its  reasonable  discretion  prior  to  the 
closing thereof and (iii) any material modification to such loan shall be subject to Agent’s written approval (a “PPP Loan”);[Reserved];

9.

intercompany  Indebtedness  as  long  as  each  of  the  Subsidiary  obligor  and  the  Subsidiary  obligee  under  such  Indebtedness  is  a 
Subsidiary that has executed a Joinder Agreement, or other intercompany Indebtedness resulting from a Permitted Investment in accordance with clause (j) 
of the defined term “Permitted Investments”;

10.

11.

Permitted Convertible Debt in an aggregate principal amount not to exceed $150,000,000350,000,000 at any one time outstanding; 

other unsecured Indebtedness in an amount not to exceed $1,000,0003,000,000 at any time outstanding; and

12.

extensions, refinancings and renewals of any items of Permitted Indebtedness, provided that the principal amount is not increased or 
the  terms  modified  to  impose  materially  more  burdensome  terms  upon  Borrower  or  the  applicable  Subsidiary,  as  the  case  may  be,  and  subject  to  any 
limitations on aggregate amount of such Indebtedness.

“Permitted Investment” means:  

1.

Investments existing (i) on the Closing Date which are disclosed in Schedule 1B and (ii) on the Second Amendment Effective Date 

which are disclosed in the Perfection Certificate; 

2.

(i)  marketable  direct  obligations  issued  or  unconditionally  guaranteed  by  the  United  States  of  America  or  any  agency  or  any  State 
thereof  maturing  within  one  year  from  the  date  of  acquisition  thereof  currently  having  a  rating  of  at  least  A-2  or  P-2  from  either  Standard  &  Poor’s 
Corporation or Moody’s Investors Services, (ii) commercial paper maturing no more than one year from the date of creation thereof and currently having a 
rating of at least A-2 or P-2 from either Standard & Poor’s Corporation or Moody’s Investors Services, (iii) certificates of deposit issued by any bank with 
assets  of  at  least  $500,000,000  maturing  no  more  than  one  year  from  the  date  of  investment  therein,  (iv)  money  market  accounts,  and  (v)  Investments 
pursuant to the investment policy that has been provided to the Agent prior to the Closing Date or any investment policy that has been approved by the 
Agent;

3.

repurchases  of  stock  of  Borrower  from  former  employees,  directors,  or  consultants  of  Borrower  under  the  terms  of  applicable 
repurchase agreements at the original issuance price of such securities in an aggregate amount not to exceed $500,000 in any fiscal year, provided that no 
Event of Default has occurred, is continuing or could exist after giving effect to the repurchases;

4.

5.

Investments accepted in connection with Permitted Transfers;

Investments (including debt obligations) received in connection with the bankruptcy or reorganization of customers or suppliers and in 

settlement of delinquent obligations of, and other disputes with, customers or suppliers arising in the ordinary course of business;

6.

Investments consisting of notes receivable of, or prepaid royalties and other credit extensions, to customers and suppliers who are not 
Affiliates, in the ordinary course of business, provided that this clause (f) shall not apply to Investments of any Loan Party in any Subsidiary of a Loan 
Party;

212788652 v9 

263757953 v7

8

 
 
7.

Investments consisting of loans not involving the net transfer on a substantially contemporaneous basis of cash proceeds to employees, 
officers or directors relating to the purchase of capital stock of Borrower pursuant to employee stock purchase plans or other similar agreements approved 
by Borrower’s Board;

8.

9.

Investments consisting of travel advances in the ordinary course of business; 

Investments in newly-formed Domestic Subsidiaries, provided that each such Domestic Subsidiary enters into a Joinder Agreement 

promptly after its formation and executes such other documents as shall be reasonably requested by Agent;

10.

Investments in Foreign Subsidiaries not to exceed $500,0002,500,000 per fiscal year;  

11.

joint ventures or strategic alliances in the ordinary course of business consisting of the licensing of technology, the development of 
technology or the providing of technical support as permitted hereunder or the licensing of Intellectual Property on terms permitted hereunder in connection 
with co-promotion agreements with strategic pharmaceutical partners, provided, in each case, that cash Investments (if any) by Borrower or the applicable 
Subsidiary do not exceed $500,0005,000,000 in the aggregate in any fiscal year;  

12.

Investments in the MSC Subsidiary, so long as an Event of Default does not exist at the time of such Investment and would not exist 

after giving effect to such Investment and provided that Borrower is, at all times, in compliance with the MSC Investment Conditions; 

13.

14.

Investments constituting Permitted Acquisitions;

Borrower’s  entry  into  (including  payments  of  premiums  in  connection  therewith),  and  the  performance  of  obligations  under,  any 

Permitted Bond Hedge Transactions and Permitted Warrant Transactions in accordance with their terms; and

15.

additional Investments that do not exceed $1,000,0003,000,000 in the aggregate.

“Permitted Liens” means: 

1.

2.

Liens in favor of Agent;

Liens existing (i) on the Closing Date which are disclosed in Schedule 1C and (ii) on the Second Amendment Effective Date which are 

disclosed in the Perfection Certificate;

3.

Liens for taxes, fees, assessments or other governmental charges or levies, either not yet delinquent or being contested in good faith by 

appropriate proceedings; provided, that Borrower maintains adequate reserves therefor in accordance with GAAP;

4.

Liens  securing  claims  or  demands  of  materialmen,  artisans,  mechanics,  carriers,  warehousemen,  landlords  and  other  like  Persons 

arising in the ordinary course of business and imposed without action of such parties; provided, that the payment thereof is not yet required;

5.

Liens arising from judgments, decrees or attachments in circumstances which do not constitute an Event of Default hereunder;

6.

the following deposits, to the extent made in the ordinary course of business:  deposits under worker’s compensation, unemployment 
insurance,  social  security  and  other  similar  laws,  or  to  secure  the  performance  of  bids,  tenders  or  contracts  (other  than  for  the  repayment  of  borrowed 
money)  or  to  secure  indemnity,  performance  or  other  similar  bonds  for  the  performance  of  bids,  tenders  or  contracts  (other  than  for  the  repayment  of 
borrowed money) or to secure statutory obligations (other than Liens arising under ERISA or environmental Liens) or surety or appeal bonds, or to secure 
indemnity, performance or other similar bonds;

212788652 v9 

263757953 v7

9

 
 
7.

Liens on Equipment or software or other intellectual property constituting purchase money Liens and Liens in connection with capital 

leases securing Indebtedness permitted in clause (c) of “Permitted Indebtedness”;

8.

9.

Liens incurred in connection with Subordinated Indebtedness;

leasehold interests in leases or subleases and licenses (other than with respect to Intellectual Property) granted in the ordinary course of 

business and not interfering in any material respect with the business of the licensor;

10.

Liens in favor of customs and revenue authorities arising as a matter of law to secure payment of custom duties that are promptly paid 

on or before the date they become due;

11.

Liens on insurance proceeds securing the payment of financed insurance premiums that are promptly paid on or before the date they 

become due (provided that such Liens extend only to such insurance proceeds and not to any other property or assets);

12.

statutory  and  common  law  rights  of  set-off  and  other  similar  rights  as  to  deposits  of  cash  and  securities  in  favor  of  banks,  other 

depository institutions and brokerage firms or securities intermediaries to cover fees, similar expenses and charges;

13.

easements, servitudes, zoning restrictions, rights-of-way and similar encumbrances on real property imposed by law or arising in the 

ordinary course of business so long as they do not materially impair the value or marketability of the related property;

14.

15.

licenses and other arrangements for the use of Intellectual Property permitted hereunder; 

(i) Liens on Cash securing obligations permitted under clause (g) of the definition of Permitted Indebtedness and (ii) security deposits 

in connection with real property leases, the combination of (i) and (ii) in an aggregate amount not to exceed $3,000,00015,000,000 at any time; and

1.

in  connection  with  a  permitted  transfer  described  in  clause  (g)  of  the  defined  term  “Permitted  Transfer”,  (i)  in  connection  with  a 
royalty  participation  sale  or  buyout,  any  precautionary  UCC  filing  in  sole  respect  to  the  subject  asset  transferred  thereby,  or  (ii)  in  connection  with  a 
synthetic royalty transaction, a security interest solely in the Intellectual Property giving rise to the financed revenue interest, provided that as a condition to 
any security interest described in this clause (ii), the following conditions shall have been met: (A) Borrower shall have entered into an amendment to this 
Agreement and such other Loan Documents as Agent may reasonably request to grant to Agent, for the ratable benefit of Lenders, a security interest in the 
subject  Intellectual  Property,  and  (B)  a  first/second  lien  intercreditor  agreement  in  form  and  substance  satisfactory  to  Agent,  in  Agent’s  good  faith 
discretion, shall be in effect between Agent and the revenue interest financing investor, which shall provide, among other things, that any security interest 
granted to such investor shall at all times be subordinated to the security interest granted to secure the Secured Obligations; and

2.

(p) Liens incurred in connection with the extension, renewal or refinancing of the Indebtedness secured by Liens of the type described 
in clause (b) above; provided, that any extension, renewal or replacement Lien shall be limited to the property encumbered by the existing Lien and the 
principal amount of the Indebtedness being extended, renewed or refinanced (as may have been reduced by any payment thereon) does not increase.

“Permitted Transfers” means: 

1.

sales of Inventory in the ordinary course of business;

2.

(i)  licenses,  obligations  and  other  rights  and  arrangements  pursuant  to  the  Collaboration  and  License  Agreement,  dated  January  9, 
2016,  by  and  between  Nestec  Ltd.  and  Borrower,  as  amended,  restated  or  modified  from  time  to  time,  (ii)  licenses,  obligations  and  other  rights  and 
arrangements granted pursuant to the Research and Collaboration and Option Agreement, dated March 11, 2019, by and between MedImmune, LLC and 
Borrower, as 

212788652 v9 

263757953 v7

10

 
 
amended, restated or modified form time to time, (iii) non-exclusive licenses and similar arrangements for the use of Intellectual Property in the ordinary 
course of business, and (iv) exclusive licenses, entered into on an arms’ length basis, and which do not result in legal transfer of the licensed property, 
provided that such licenses are either (A) licenses of Intellectual Property which are exclusive with respect to geography only as to specific geographic 
territories or countries outside of the United States, or (B) a license of Intellectual Property which may be exclusive with respect to geography worldwide, 
including the United States, or just the United States, provided further that any exclusive license on the terms set forth in clause (B) shall be a “Permitted 
Transfer” only if following the entry into such license (or, as applicable, upon the effectiveness of exclusivity pursuant to such license) Borrower maintains 
Unrestricted Cash in an amount of at least 105% of the Secured Obligations at all times; 

3.

4.

5.

6.

dispositions of worn-out, obsolete or surplus Equipment at fair market value in the ordinary course of business; 

use of Cash in the ordinary course of business or as otherwise permitted herein; 

sale of stock or other shares in the ordinary course of business;

transfers constituting the making of Permitted Investments, or the granting of Permitted Liens; and

1.

transfers by Borrower of the right to receive future royalties on net sale or other milestones for a product candidate of Borrower in 
connection with a royalty financing, revenue interest financing or a similar transaction (including without limitation a royalty participation buyout or sale), 
in exchange for an upfront payment of Unrestricted Cash in an amount not less than $25,000,000, provided that such arrangement does not provide for a 
security interest in Borrower’s intellectual property other than a Permitted Lien described in clause (p) of the defined term “Permitted Liens”; and

2.

(g)  other  transfers  of  assets  having  a  fair  market  value  of  not  more  than  $500,0001,500,000  in  the  aggregate  in  any  fiscal  year, 
provided that this clause (h) shall not operate to consent to transfers of Intellectual Property or related assets, including in connection with an exclusive 
license, to the extent not permitted under clause (b) above.

“Permitted Warrant Transaction” means any call option, warrant or right to purchase (or substantively equivalent derivative transaction) relating 
to Borrower’s common stock (or other securities or property following a merger event or other change of the common stock of Borrower) and/or cash (in 
an amount determined by reference to the price of such common stock) sold by Borrower substantially concurrently with any purchase by Borrower of a 
related Permitted Bond Hedge Transaction.

“Person”  means  any  individual,  sole  proprietorship,  partnership,  joint  venture,  trust,  unincorporated  organization,  association,  corporation, 

limited liability company, institution, other entity or government.

“Pledge Agreement” means the Pledge Agreement dated as of the Closing Date between Borrower and Agent, as the same may from time to time 

be amended, restated, modified or otherwise supplemented.

“Products”  means  all  products,  software,  service  offerings,  technical  data  or  technology  currently  being  designed,  manufactured  or  sold  by 
Borrower or any of its Subsidiaries or which Borrower or any of its Subsidiaries intends to sell, license, or distribute in the future including any products or 
service offerings under development, collectively, together with all products, software, service offerings, technical data or technology that have been sold, 
licensed or distributed by Borrower since formation.

“Receivables” means (i) all of Borrower’s Accounts, Instruments, Documents, Chattel Paper, Supporting Obligations, letters of credit, proceeds 

of any letter of credit, and Letter of Credit Rights, and (ii) all customer lists, software, and business records related thereto.

212788652 v9 

263757953 v7

11

 
 
“Redemption Conditions”  means,  with  respect  to  any  redemption  by  Borrower  of  any  Permitted  Convertible  Debt,  satisfaction  of  each  of  the 
following  events:  (a)  no  Defaultdefault  or  Event  of  Default  shall  exist  or  result  therefrom,  and  (b)  both  immediately  before  and  at  all  times  after  such 
redemption, Borrower’s Unrestricted Cash shall be no less than 150% of the outstanding Secured Obligations.

“Regulatory Approval Milestone” means that (i) the FDA has approved a Biologics License Application for SER-109 for an indication relating to 
the treatment of recurrent Clostridioides difficile infection with a label or indication that is generally consistent with that sought in Borrower’s Biologics 
License Application submission and (ii) Borrower has received the $125,000,000 payment related to the “First Regulatory Approval by the FDA for the 
first Collaboration Product” as set forth in Section 7.2(a) of the Nestle License Agreement (2021). 

“Required Lenders” means at any time, the holders of more than 50% of the sum of the aggregate unpaid principal amount of the Term Loan 

Advances then outstanding.

“Sanctioned Country” means, at any time, a country or territory which is the subject or target of any Sanctions.

“Sanctioned Person” means, at any time, (a) any Person listed in any Sanctions-related list of designated Persons maintained by the Office of 
Foreign Assets Control of the U.S. Department of the Treasury or the U.S. Department of State, or by the United Nations Security Council, the European 
Union or any EU member state, (b) any Person operating, organized or resident in a Sanctioned Country or (c) any Person controlled by any such Person.

“Sanctions”  means  economic  or  financial  sanctions  or  trade  embargoes  imposed,  administered  or  enforced  from  time  to  time  by  (a)  the  U.S. 
government, including those administered by the Office of Foreign Assets Control of the U.S. Department of the Treasury or the U.S. Department of State, 
or (b) the United Nations Security Council, the European Union or Her Majesty’s Treasury of the United Kingdom.

“SBA Funding Date” means each date on which a Lender which is an SBIC funds any portion of the Loan, which such date can only occur upon 

the confirmation by Borrower in its sole discretion that on such date it meets the requirements under Addendum 2.

“Second Amendment Date Facility Charge” means a charge of $250,000, which is payable to Lenders ratably in accordance with Section 4.2(e). 

“Second Amendment Effective Date” means February 24, 2022.

“Secured Obligations” means each Borrower’s obligations under this Agreement and any Loan Document, including any obligation to pay any 

amount now owing or later arising.

“Subordinated Indebtedness” means Indebtedness subordinated to the Secured Obligations in amounts and on terms and conditions satisfactory 

to Agent in its reasonable discretion and subject to a subordination agreement in form and substance satisfactory to Agent in its reasonable discretion.

“Subsidiary” means an entity, whether a corporation, partnership, limited liability company, joint venture or otherwise, in which Borrower owns 
or controls 50% or more of the outstanding voting securities, directly or indirectly.  If not otherwise specified, a Subsidiary shall mean a direct or indirect 
Subsidiary of Borrower, including each entity listed on Schedule 5.14 hereto.

“Taxes” means all present or future taxes, levies, imposts, duties, deductions, withholdings (including backup withholding), assessments, fees or 

other charges imposed by any governmental authority, including any interest, additions to tax or penalties applicable thereto. 

12

212788652 v9 

263757953 v7

 
 
“Term Commitment” means as to any Lender, the obligation of such Lender, if any, to make a Term Loan Advance to Borrower in a principal 

amount not to exceed the amount set forth under the heading “Term Commitment” opposite such Lender’s name on Schedule 1.1.

“Term Loan Advance” means an Advance pursuant to Section 2.1(a)

“Term Loan Interest Rate” means, for any day, a per annum rate of interest equal to the greater of (i) the prime rate as reported in The Wall Street 

Journal, plus 4.406.40%, and (ii) 9.65%.

“Term Loan Maturity Date” means NovemberOctober 1, 20232024; provided that if such dayas of such date the Extension Condition is satisfied 
then the Term Loan Maturity Date shall be extended to October 1, 2025.  If the applicable Term Loan Maturity Date is not a Business Day, the Term Loan 
Maturity Date shall be the immediately preceding Business Day.

“Trademark License” means any written agreement granting any right to use any Trademark or Trademark registration, now owned or hereafter 

acquired by Borrower or in which Borrower now holds or hereafter acquires any interest.

“Trademarks” means all trademarks (registered, common law or otherwise) and any applications in connection therewith, including registrations, 
recordings and applications in the United States Patent and Trademark Office or in any similar office or agency of the United States of America, any State 
thereof or any other country or any political subdivision thereof. 

“Tranche III” means the advances pursuant to Section 2.1(a)(iii). 

“Tranche V Facility Charge” means one half of one percent (0.5%) of the principal amount of the Tranche V Advance funded, which is payable 

to Lenders ratably in accordance with Section 4.2(e).

“Tranche IIIVI Facility Charge” means one half of one percent (1.00.5%)  of  the  principal  amount  of  any  Advance  pursuant  to  Tranche  IIIVI 

Advances funded, which is payable to Lenders ratably in accordance with Section 4.2(df).

“UCC” means the Uniform Commercial Code as the same is, from time to time, in effect in the State of California; provided, that in the event 
that, by reason of mandatory provisions of law, any or all of the attachment, perfection or priority of, or remedies with respect to, Agent’s Lien on any 
Collateral is governed by the Uniform Commercial Code as the same is, from time to time, in effect in a jurisdiction other than the State of California, then 
the term “UCC” shall mean the Uniform Commercial Code as in effect, from time to time, in such other jurisdiction solely for purposes of the provisions 
thereof relating to such attachment, perfection, priority or remedies and for purposes of definitions related to such provisions.

“Unrestricted Cash” means unrestricted Cash of Borrower maintained in Deposit Accounts or other accounts in Borrower’s name subject to an 

Account Control Agreement in favor of Agent, subject to any post-closing period provided under this Agreement to deliver Account Control Agreements.

“U.S. Person” means any Person that is a “United States person” as defined in Section 7701(a)(30) of the Code. 

a.

1.1 Certain Additional Defined Terms.  The following terms are defined in the Sections or subsections referenced opposite such terms: 

212788652 v9 

263757953 v7

Defined Term

13

Section

 
 
 
 
“Agent”

“Assignee”

“Borrower”

“Claims”

“Collateral”

“Confidential Information”

“End of Term Charge”

“Event of Default”

“Financial Statements”

“Incremental End of Term Charge” 

“Lender”

“Maximum Rate”

“Original End of Term Charge” 

“Prepayment Charge”

“Publicity Materials”

“Register”

“Rights to Payment”

“SBA”

“SBIC”

“SBIC Act”

“Tranche I Advances”

“Tranche II Advance”

“Tranche IV Advance”

“Tranche V Advance”

“Tranche VI Advances”

Preamble

11.13

Preamble

11.10

3.1

11.12

2.5(b)

9

7.1

2.5(b)

Preamble

2.2

2.5(a)

2.4

11.18

11.7

1.1

7.16

7.16

7.16

2.1(a)(i)

2.1(a)(ii)

2.1(a)(iv)

2.1(a)(v)

2.1(a)(vi)

212788652 v9 

263757953 v7

14

 
 
 
Unless otherwise specified, all references in this Agreement or any Annex or Schedule hereto to a “Section,” “subsection,” “Exhibit,” “Annex,” 
or  “Schedule”  shall  refer  to  the  corresponding  Section,  subsection,  Exhibit,  Annex,  or  Schedule  in  or  to  this  Agreement.    Unless  otherwise  specifically 
provided  herein,  any  accounting  term  used  in  this  Agreement  or  the  other  Loan  Documents  shall  have  the  meaning  customarily  given  such  term  in 
accordance with GAAP, and all financial computations hereunder shall be computed in accordance with GAAP, consistently applied.  Unless otherwise 
defined herein or in the other Loan Documents, terms that are used herein or in the other Loan Documents and defined in the UCC shall have the meanings 
given to them in the UCC.  For all purposes under the Loan Documents, in connection with any division or plan of division under Delaware law (or any 
comparable event under a different jurisdiction’s laws): (a) if any asset, right, obligation or liability of any Person becomes the asset, right, obligation or 
liability of a different Person, then it shall be deemed to have been transferred from the original Person to the subsequent Person and (b) if any new Person 
comes into existence, such new Person shall be deemed to have been organized on the first date of its existence by the holders of its Equity Interests at such 
time. 

Notwithstanding anything to the contrary in this Agreement or any other Loan Document, all terms of an accounting or financial nature used 
herein  shall  be  construed,  and  all  computations  of  amounts  and  ratios  referred  to  herein  shall  be  made  without  giving  effect  to  any  treatment  of 
Indebtedness in respect of convertible debt instruments under Accounting Standards Codification 470-20 (or any other Accounting Standards Codification 
or Financial Accounting Standard having a similar result or effect) to value any such Indebtedness in a reduced or bifurcated manner as described therein, 
and such Indebtedness shall at all times be valued at the full stated principal amount thereof.  For the avoidance of doubt, and without limitation of the 
foregoing,  Permitted  Convertible  Debt  shall  at  all  times  be  valued  at  the  full  stated  principal  amount  thereof  and  shall  not  include  any  reduction  or 
appreciation in value of the shares deliverable upon conversion thereof.

a.

Term Loan Advances.

i.

Term Commitment.  

2.
THE LOAN

1.

Tranche I.  Subject to the terms and conditions of this Agreement, (A) on the Closing Date, Lenders shall 

severally (and not jointly) make, and Borrower agrees to draw, a Term Loan Advance of $15,000,000, and (B) at any time prior to 
March 15, 2020, Borrower may request and Lenders shall severally (and not jointly) make, additional Term Loan Advances, in 
minimum increments of $5,000,000 (or if less than $5,000,000 the remaining amount of Term Loan Advances available to be drawn 
pursuant to this Section 2.1(a)(i)), provided that the aggregate principal amount of the Term Loan Advances made pursuant to this 
Section 2.1(a)(i) (collectively “Tranche I Advances”) shall not exceed $25,000,000.  As of the Second Amendment Effective Date, 
taking into account the principal amounts previously repaid and redrawn on the Second Amendment Effective Date, the Tranche I 
Advances have been fully funded and remain outstanding. 

1.

Tranche II.  Subject to the terms and conditions of this Agreement, on the Second Amendment Effective Date, 
Lenders shall severally (and not jointly) make, and Borrower agrees to draw, a Term Loan Advance of $12,500,000 (the “Tranche II 
Advance”). 

2.

Tranche III.  [expired unfunded].

3.

Tranche IV.  Subject to the terms and conditions of this Agreement, on the Second Amendment Effective Date, 
Lenders shall severally (and not jointly) make, and Borrower agrees to draw, a Term Loan Advance of $12,500,000 (the “Tranche IV 
Advance”). 

4.

(ii) Tranche IIV.  Subject to the terms and conditions of this Agreement and satisfaction of Performance, upon 

achievement of the Regulatory Approval Milestone II, on or 

212788652 v9 

263757953 v7

15

 
 
prior to Marchbut no later than December 15, 20212023, Borrower may request, and Lenders shall severally (and not jointly) make, an 
additionala Term Loan Advance (the “Tranche V Advance”) of $12,500,00025,000,000.

5.

(iii) Tranche IIIVI.  Subject to the terms and conditions of this Agreement and futurediscretionary approval by 
Lenders’of the applicable Lender(s) investment committee to support the in-licensing or acquisition of assets by Borrower or other 
strategic initiatives of Borrower, on or prior to June 30, 2021, but no later than the Amortization Date, Borrower may request, and 
Lenders shall severally (and not jointly) make, one or more additional Term Loan Advances in minimum increments of $5,000,000 (or 
if less than $5,000,000 the remaining, provided that the aggregate principal amount of Term Loan Advances available to be drawn 
pursuant tomade under this Section 2.1(a)(i)) in an aggregate principal amount up to $12,500,000vi) (collectively, the “Tranche VI 
Advances”) shall not exceed $25,000,000.

The aggregate outstanding Term Loan Advances shall not exceed the Maximum Term Loan Amount.  Each Term Loan Advance of each Lender 
shall not exceed its respective Term Commitment. Except as provided above with respect to any Tranche I Advances redrawn on the Second Amendment 
Effective Date, once repaid no Term Loan Advance may be reborrowed.

ii.

Advance Request.  To obtain a Term Loan Advance, Borrower shall complete, sign and deliver an Advance Request to 
Agent at least three (3) Business Days before the Advance Date, other than the Term Loan Advance to be made on the Closing Date or the 
Second Amendment Effective Date, which shall be at least one (1) Business Day before the Advance Date.  Lenders shall fund the Term Loan 
Advance in the manner requested by the Advance Request provided that each of the conditions precedent to such Term Loan Advance is satisfied 
as of the requested Advance Date.

iii.

Interest.  The principal balance of each Term Loan Advance shall bear interest thereon from such Advance Date at the Term 

Loan Interest Rate based on a year consisting of 360 days, with interest computed daily based on the actual number of days elapsed.  The Term 
Loan Interest Rate will float and change on the day the “prime rate” as reported in the Wall Street Journal changes from time to time.

iv.

Payment.  Borrower shall pay interest on each Term Loan Advance on the first Business Day of each month, beginning the 
month after the Advance Date continuing until the Amortization Date.  Borrower shall repay the aggregate principal balance of the Term Loan 
Advances that is outstanding on the day immediately preceding the Amortization Date, in equal monthly installments of principal and interest 
(mortgage style) beginning on the Amortization Date and continuing on the first Business Day of each month thereafter until the Secured 
Obligations (other than inchoate indemnity obligations) are repaid, provided that if the Term Loan Interest Rate is adjusted in accordance with its 
terms, or the Amortization Date is extended, the amount of each subsequent monthly installment shall be recalculated.  The entire principal 
balance of the Term Loan Advances and all accrued but unpaid interest hereunder, shall be due and payable on the Term Loan Maturity Date.  
Borrower shall make all payments under this Agreement without setoff, recoupment or deduction and regardless of any counterclaim or defense.  
If a payment hereunder becomes due and payable on a day that is not a Business Day, the due date thereof shall be the immediately preceding 
Business Day.  Agent, for the benefit of Lenders, shall initiate debit entries to Borrower’s account as authorized on the ACH Authorization (i) on 
each payment date of all periodic obligations payable to Lenders under each Term Loan Advance and (ii) out-of-pocket legal fees and costs 
incurred by Agent or Lenders in connection with Section 11.11 of this Agreement; provided that, with respect to clause (i) above, in the event 
that Agent informs Borrower that Agent shall not initiate a debit entry to Borrower’s account for a certain amount of the periodic obligations due 
on a specific payment date, Borrower shall pay to Agent, for the benefit of Lenders, such amount of periodic obligations in full in immediately 
available funds on such payment date; provided, further, that, with respect to clause (i) above, if Agent informs Borrower that Agent shall not 
initiate a debit entry as described above later than the date that is three (3) Business Days prior to such payment date, Borrower shall pay to 
Agent, for the ratable benefit of Lenders, such amount of periodic obligations in full in immediately available funds on the date 

212788652 v9 

263757953 v7

16

 
 
that is three (3) Business Days after the date on which Agent notifies Borrower thereof; provided, further, that, with respect to clause (ii) above, 
in the event that Agent informs Borrower that Agent shall not initiate a debit entry to Borrower’s account for specified out-of-pocket legal fees 
and costs incurred by Agent or Lenders, Borrower shall pay to Agent such amount in full in immediately available funds within three (3) 
Business Days.

b.

Maximum Interest.  Notwithstanding any provision in this Agreement or any other Loan Document, it is the parties’ intent not to 

contract for, charge or receive interest at a rate that is greater than the maximum rate permissible by law that a court of competent jurisdiction shall deem 
applicable hereto (which under the laws of the State of California shall be deemed to be the laws relating to permissible rates of interest on commercial 
loans) (the “Maximum Rate”).  If a court of competent jurisdiction shall finally determine that Borrower has actually paid to Lenders an amount of interest 
in excess of the amount that would have been payable if all of the Secured Obligations had at all times borne interest at the Maximum Rate, then such 
excess interest actually paid by Borrower shall be applied as follows:  first, to the payment of the Secured Obligations consisting of the outstanding 
principal; second, after all principal is repaid, to the payment of Lenders’ accrued interest, costs, expenses, professional fees and any other Secured 
Obligations; and third, after all Secured Obligations are repaid, the excess (if any) shall be refunded to Borrower.

c.

Default Interest.  In the event any payment is not paid on the scheduled payment date, other than due to a failure of any ACH debit due 
solely to an administrative or operational error of Agent or Lender or Borrower’s bank if Borrower had the funds to make the payment when due and makes 
the payment within three (3) Business Days following Borrower’s knowledge of such failure to pay, an amount equal to four percent (4%) of the past due 
amount shall be payable on demand.  In addition, upon the occurrence and during the continuation of an Event of Default hereunder, all Secured 
Obligations, including principal, interest, compounded interest, and professional fees, shall bear interest at a rate per annum equal to the rate set forth in 
Section 2.1(c), plus four percent (4%) per annum.  In the event any interest is not paid when due hereunder, delinquent interest shall be added to principal 
and shall bear interest on interest, compounded at the rate set forth in Section 2.1(c) or this Section 2.3, as applicable.

d.

Prepayment.  At its option, Borrower may at any time prepay all or a portion of the outstanding Advances by paying the entire 

principal balance (or such portion thereof), all accrued and unpaid interest thereon, together with a prepayment charge equal to the following percentage of 
the principal amount of the Advance being prepaid: for any prepayment of an Advance on or prior to the one year anniversary of the Closing Date, 
3.0Second Amendment Effective Date, 2.0%; after the one-year anniversary of the ClosingSecond Amendment Effective Date, through the two-year 
anniversary of the ClosingSecond Amendment Effective Date, 2.01.5%; and after the two-year anniversary of the Closing DateSecond Amendment 
Effective Date through the three-year anniversary of the Second Amendment Effective Date, 1.0% (each, a “Prepayment Charge”).  No prepayment charge 
shall apply to any prepayment made pursuant to this Section 2.4 after the three-year anniversary of the Second Amendment Effective Date.  Borrower 
agrees that the Prepayment Charge is a reasonable calculation of Lenders’ lost profits in view of the difficulties and impracticality of determining actual 
damages resulting from an early repayment of the Advances.  Borrower shall prepay the outstanding amount of all principal and accrued interest through 
the prepayment date and the Prepayment Charge upon the occurrence of a Change in Control.  Notwithstanding the foregoing, Agent and Lenders agree to 
waive the Prepayment Charge if Agent and Lenders or their respective Affiliates (in their sole and absolute discretion) agree in writing to refinance the 
Advances prior to the Term Loan Maturity Date.  Any amounts paid under this Section shall be applied by Agent to the then unpaid amount of any Secured 
Obligations (including principal and interest) pro rata to all scheduled amounts owed.  For the avoidance of doubt, if a payment hereunder becomes due and 
payable on a day that is not a Business Day, the due date thereof shall be the immediately preceding Business Day.  

b.

End of Term Charge.  

i.

On the earliest to occur of (i) November 1, 2023, (ii) the date that Borrower prepays the outstanding Secured Obligations 

(other than any inchoate indemnity obligations and any other obligations which, by their terms, are to survive the termination of this Agreement) 
in full, or (iii) the date that the Secured Obligations become due and payable in full pursuant to the terms of this Agreement, Borrower 

212788652 v9 

263757953 v7

17

 
 
shall pay the Lender of the Tranche I Advances made hereunder, in respect of the Tranche I Advances made by such Lender, a charge of 
$1,212,500 (the “Original End of Term Charge”).

ii.

2.5 End of Term Charge.  On the earliest to occur of (i) the Term Loan Maturity Date, (ii) the date that Borrower prepays the 

outstanding Secured Obligations (other than any inchoate indemnity obligations and any other obligations which, by their terms, are to survive 
the termination of this Agreement) in full, or (iii) the date that the Secured Obligations become due and payable in full pursuant to the terms of 
this Agreement, Borrower shall pay Lenders a charge of 4.851.75% of the aggregate original principal amount of the Term Loan Advances made 
hereunder (including, for avoidance of doubt, the Tranche I Advances) (the “Incremental End of Term Charge”, and together with the Original 
End of Term Charge, the “End of Term Charge”).

i.

Notwithstanding the required payment date of suchany End of Term Charge, the applicable pro rata portion of the applicable 
End of Term Charge shall be deemed earned by Lenders on the date the applicable Term Loan Advance is made.  For the avoidance of doubt, if a 
payment hereunder becomes due and payable on a day that is not a Business Day, the due date thereof shall be the immediately preceding 
Business Day.

e.

Pro Rata Treatment.  Each payment (including prepayment) on account of any fee and any reduction of the Term Loan Advances shall 

be made pro rata according to the Term Commitments of the relevant Lenders.

hereto.

f.

g.

Taxes; Increased Costs.  Borrower, Agent and Lenders each hereby agree to the terms and conditions set forth on Addendum 1 attached 

Treatment of Prepayment Charge and End of Term Charge.  Borrower agrees that any Prepayment Charge and any End of Term Charge 

payable shall be presumed to be the liquidated damages sustained by each Lender as the result of the early termination, and Borrower agrees that it is 
reasonable under the circumstances currently existing and existing as of the Closing Date or the Second Amendment Effective Date, as applicable.  The 
Prepayment Charge and the End of Term Charge shall also be payable in the event the Secured Obligations (and/or this Agreement) are satisfied or released 
by foreclosure (whether by power of judicial proceeding), deed in lieu of foreclosure, or by any other means.  Each Loan Party expressly waives (to the 
fullest extent it may lawfully do so) the provisions of any present or future statute or law that prohibits or may prohibit the collection of the foregoing 
Prepayment Charge and End of Term Charge in connection with any such acceleration.  Borrower agrees (to the fullest extent that each may lawfully do 
so): (a) each of the Prepayment Charge and the End of Term Charge is reasonable and is the product of an arm’s length transaction between sophisticated 
business people, ably represented by counsel; (b) each of the Prepayment Charge and the End of Term Charge shall be payable notwithstanding the then 
prevailing market rates at the time payment is made; (c) there has been a course of conduct between Lenders and Borrower giving specific consideration in 
this transaction for such agreement to pay the Prepayment Charge and the End of Term Charge as a charge (and not interest) in the event of prepayment or 
acceleration; and (d) Borrower shall be estopped from claiming differently than as agreed to in this paragraph.  Borrower expressly acknowledges that its 
agreement to pay each of the Prepayment Charge and the End of Term Charge to Lenders as herein described was on the Closing Date or the Second 
Amendment Effective Date, as applicable, and continues to be a material inducement to Lenders to provide the Term Loan Advances.

3.
SECURITY INTEREST

a.

Grant of Security Interest.  As security for the prompt and complete payment when due (whether on the payment dates or otherwise) of 

all the Secured Obligations, Borrower grants to Agent a security interest in all of Borrower’s right, title, and interest in, to and under all of Borrower’s 
personal property and other assets including without limitation the following (except as set forth herein) whether now owned or hereafter acquired 
(collectively, the “Collateral”):  (a) Receivables; (b) Equipment; (c) Fixtures; (d) General Intangibles, (e) Inventory; (f) Investment Property; (g) Deposit 
Accounts; (h) Cash; (i) Goods; and all other tangible and intangible personal property of Borrower whether now or hereafter owned or existing, leased, 
consigned by or to, or acquired by, 

212788652 v9 

263757953 v7

18

 
 
Borrower and wherever located, and any of Borrower’s property in the possession or under the control of Agent; and, to the extent not otherwise included, 
all Proceeds of each of the foregoing and all accessions to, substitutions and replacements for, and rents, profits and products of each of the foregoing; 
provided, however, that the Collateral shall include all Accounts and General Intangibles that consist of rights to payment and proceeds from the sale, 
licensing or disposition of all or any part, or rights in, the Intellectual Property (the “Rights to Payment”).  Notwithstanding the foregoing, if a judicial 
authority (including a U.S. Bankruptcy Court) holds that a security interest in the underlying Intellectual Property is necessary to have a security interest in 
the Rights to Payment, then the Collateral shall automatically, and effective as of the date of this Agreement, include the Intellectual Property to the extent 
necessary to permit perfection of Agent’s security interest in the Rights to Payment.

b.

Excluded Collateral.  Notwithstanding the broad grant of the security interest set forth in Section 3.1, above, the Collateral shall not 
include (a) any Intellectual Property, (b) more than 65% of the presently existing and hereafter arising issued and outstanding Equity Interests owned by 
Borrower of any Foreign Subsidiary or Foreign Subsidiary Holding Company which Equity Interests entitle the holder thereof to vote for directors or any 
other matter, (c) nonassignable licenses or contracts, including without limitation any licenses described in clause (b) of the defined term “Permitted 
Transfers”, which by their terms require the consent of the licensor thereof or another party (but only to the extent such prohibition on transfer is 
enforceable under applicable law, including, without limitation, Sections 9406, 9407 and 9408 of the UCC), provided further, that upon the termination of 
such prohibition or such consent being provided with respect to any license or contract, such license or contract shall automatically be included in the 
Collateral, (d) property for which the granting of a security interest therein is contrary to applicable law, provided that upon the cessation of any such 
restriction or prohibition, such property shall automatically be included in the Collateral; (e) any Excluded Accounts; and (f) any cash collateral deposit 
subject to a Permitted Lien hereunder, if the grant of a security interest with respect to such property pursuant to this Agreement would be prohibited by the 
agreement creating such Permitted Lien or would otherwise constitute a default thereunder or create a right of termination a party thereto (other than 
Borrower), provided that upon the termination and release of such cash collateral, such property shall automatically be included in the Collateral. 

4.
CONDITIONS PRECEDENT TO LOAN

The obligations of Lenders to make the Loan hereunder are subject to the satisfaction by Borrower of the following conditions:

a.

Initial Advance.  On or prior to the Closing Date, Borrower shall have delivered to Agent the following:

i.

duly executed copies of the Loan Documents, (except to the extent permitted to be delivered post-closing in accordance with 

Section 4.4) Account Control Agreements, and all other documents and instruments reasonably required by Agent to effectuate the transactions 
contemplated hereby or to create and perfect the Liens of Agent with respect to all Collateral., in all cases in form and substance reasonably 
acceptable to Agent;

ii.

iii.

a legal opinion of Borrower’s counsel in form and substance reasonably acceptable to Agent;

a copy of resolutions of Borrower’s Board evidencing approval of the Loan and other transactions evidenced by the Loan 

Documents, certified by an officer of Borrower;

iv.

copies of the Charter of Borrower, certified by the Secretary of State of the applicable jurisdiction of organization and the 

other Organizational Documents, as amended through the Closing Date, of Borrower certified by an officer of Borrower;

v.

certificates of good standing for Borrower from the applicable jurisdiction of organization and similar certificates from all 

other jurisdiction in which Borrower does business and where the failure to be qualified could have a Material Adverse Effect;

212788652 v9 

263757953 v7

19

 
 
vi.

payment of the Due Diligence Fee, Initial Facility Charge and reimbursement of Agent’s and Lenders’ current expenses 

reimbursable pursuant to this Agreement, which amounts may be deducted from the initial Advance;

vii.

viii.

all certificates of insurance, endorsements, and copies of each insurance policy required pursuant to Section 6.2; and

such other documents as Agent may reasonably request.

b.

All Advances.  On each Advance Date:

i.

Agent shall have received (i) an Advance Request for the relevant Advance as required by Section 2.1(b), duly executed by 

Borrower’s Chief Executive Officer or Chief Financial Officer, and (ii) any other documents Agent may reasonably request.

ii.

The representations and warranties set forth in this Agreement shall be true and correct in all material respects on and as of 
the Advance Date with the same effect as though made on and as of such date, except to the extent such representations and warranties expressly 
relate to an earlier date.

iii.

Borrower shall be in compliance with all the terms and provisions set forth herein and in each other Loan Document on its 

part to be observed or performed, and at the time of and immediately after such Advance no Event of Default shall have occurred and be 
continuing.

iv.

With respect to any Advance pursuant to Tranche IIIthe Tranche II Advance and the Tranche IV Advance (and in 

consideration of the modifications to the terms and provisions applicable to the outstanding Tranche I Advance), Borrower shall have paid the 
Tranche IIISecond Amendment Date Facility Charge.

iii.

iv.

v.

With respect to the Tranche V Advance, Borrower shall have paid the Tranche V Facility Charge. 

With respect to any Tranche VI Advance, Borrower shall have paid the Tranche VI Facility Charge.

(e) With respect to any Tranche VI Advance pursuant to Tranche III, Lenders’ investment committee shall have approved 

the requested AdvancesTranche VI Advance, as contemplated by Section 2.1(a)(iiivi).

Each Advance Request shall be deemed to constitute a representation and warranty by Borrower on the relevant Advance Date as to the 

matters specified in subsections (b) and (c) of this Section 4.2 and as to the matters set forth in the Advance Request.

c.

No Default.  As of the Closing Date and each Advance Date, (i) no fact or condition exists that could (or could, with the passage of 

time, the giving of notice, or both) constitute an Event of Default and (ii) no event that has had or could reasonably be expected to have a Material Adverse 
Effect has occurred and is continuing.

d.

Post-Closing Deliveries.  Borrower shall: 

i.

deliver to Agent, in form and substance satisfactory to Agent, an Account Control Agreement with respect to Borrower’s 

Deposit Accounts maintained with Bank of America within thirty (30) days of the Closing Date (or such longer period as the Agent may agree in 
its sole discretion); and 

ii.

use its commercially reasonable efforts to deliver to Agent, in form and substance satisfactory to Agent, a landlord waivers 

with respect to Borrower’s leased location at 200 Sidney Street, Cambridge, MA 02139. 

212788652 v9 

263757953 v7

20

 
 
Borrower represents and warrants that: 

5. 
REPRESENTATIONS AND WARRANTIES

a.

Organizational Status.  Borrower is duly organized, legally existing and in good standing under the laws of its jurisdiction of 

organization, and is duly qualified as a foreign corporation, limited liability company or partnership, as the case may be, in all jurisdictions in which the 
nature of its business or location of its properties require such qualifications and where the failure to be qualified could reasonably be expected to have a 
Material Adverse Effect.  Borrower’s present name, former names (if any), locations, place of formation, tax identification number, organizational 
identification number and other information are correctly set forth in Exhibit B, as may be updated by Borrower in a written notice (including any 
Compliance Certificate) provided to Agent after the Closing Date in accordance with this Agreement (including in any Compliance Certificate).

b.

Collateral.  Borrower owns the Collateral and the Intellectual Property free of all Liens, except for Permitted Liens.  Borrower has the 

power and authority to grant to Agent a Lien in the Collateral as security for the Secured Obligations.

c.

Consents.  Borrower’s execution, delivery and performance of this Agreement and all other Loan Documents to which it is a party, (i) 

have been duly authorized by all necessary action in accordance with Borrower’s Organizational Documents and applicable law, (ii) will not result in the 
creation or imposition of any Lien upon the Collateral, other than Permitted Liens, (iii) do not violate (A) any provisions of Borrower’s Organizational 
Documents, or (B) any, law, regulation, order, injunction, judgment, decree or writ to which Borrower is subject in any material respect, and (iv) do not 
violate any material contract or agreement or require the consent or approval of any other Person which has not already been obtained.  The individual or 
individuals executing the Loan Documents on behalf of Borrower are duly authorized to do so.

d.

Material Adverse Effect.  No Material Adverse Effect has occurred and is continuing, and Borrower is not aware of any event or 

circumstance that is likely to occur that is reasonably expected to result in a Material Adverse Effect.

e.

Actions Before Governmental Authorities.  There are no actions, suits or proceedings at law or in equity or by or before any 

governmental authority now pending or, to the knowledge of Borrower, threatened against or affecting Borrower or its property, that is reasonably expected 
to result in a Material Adverse Effect.

f.

Laws.  

i.

Neither Borrower nor any of its Subsidiaries is in violation of any law, rule or regulation, or in default with respect to any 

judgment, writ, injunction or decree of any governmental authority, where such violation or default is reasonably expected to result in a Material 
Adverse Effect.  Borrower is not in default under (i) any provision of any agreement or instrument evidencing material Indebtedness in any 
material respect, or (ii) any other agreement to which it is a party or by which it is bound that is reasonably expected to result in a Material 
Adverse Effect.

ii.

Neither Borrower nor any of its Subsidiaries is an “investment company” or a company “controlled” by an “investment 

company” under the Investment Company Act of 1940, as amended.  Neither Borrower nor any of its Subsidiaries is engaged as one of its 
important activities in extending credit for margin stock (under Regulations X, T and U of the Federal Reserve Board of Governors).  Borrower 
and each of its Subsidiaries has complied in all material respects with the Federal Fair Labor Standards Act.  Neither Borrower nor any of its 
Subsidiaries is a “holding company” or an “affiliate” of a “holding company” or a “subsidiary company” of a “holding company” as each term is 
defined and used in the Public Utility Holding Company Act of 2005.  Neither Borrower’s nor any of its Subsidiaries’ properties or assets has 
been used by Borrower or such Subsidiary or, to Borrower’s knowledge, by previous Persons, in disposing, producing, storing, treating, or 
transporting any hazardous substance other than in material 

212788652 v9 

263757953 v7

21

 
 
compliance with applicable laws.  Borrower and each of its Subsidiaries has obtained all consents, approvals and authorizations of, made all 
declarations or filings with, and given all notices to, all governmental authorities that are necessary to continue their respective businesses as 
currently conducted.

iii.

None  of  Borrower,  any  of  its  Subsidiaries,  or,  to  the  knowledge  of  Borrower,  any  of  Borrower’s  or  its  Subsidiaries’ 
Affiliates  or  any  of  their  respective  agents  acting  or  benefiting  in  any  capacity  in  connection  with  the  transactions  contemplated  by  this 
Agreement is (i) in violation of any Anti-Terrorism Law, (ii) engaging in or conspiring to engage in any transaction that evades or avoids, or has 
the  purpose  of  evading  or  avoiding  or  attempts  to  violate,  any  of  the  prohibitions  set  forth  in  any  Anti-Terrorism  Law,  or  (iii)  is  a  Blocked 
Person.  None of Borrower, any of its Subsidiaries, or to the knowledge of Borrower, any of their Affiliates or agents, acting or benefiting in any 
capacity in connection with the transactions contemplated by this Agreement, (x) conducts any business or engages in making or receiving any 
contribution  of  funds,  goods  or  services  to  or  for  the  benefit  of  any  Blocked  Person,  or  (y)  deals  in,  or  otherwise  engages  in  any  transaction 
relating  to,  any  property  or  interest  in  property  blocked  pursuant  to  Executive  Order  No.  13224,  any  similar  executive  order  or  other  Anti-
Terrorism Law.  None of the funds to be provided under this Agreement shall be used, directly or indirectly, (a) for any activities in violation of 
any applicable anti-money laundering, economic sanctions and anti-bribery laws and regulations laws and regulations or (b) for any payment to 
any  governmental  official  or  employee,  political  party,  official  of  a  political  party,  candidate  for  political  office,  or  anyone  else  acting  in  an 
official capacity, in order to obtain, retain or direct business or obtain any improper advantage, in violation of the United States Foreign Corrupt 
Practices Act of 1977, as amended.

g.

Information Correct and Current.  No information, report, Advance Request, financial statement, exhibit or schedule furnished, by or 

on behalf of Borrower to Agent in connection with any Loan Document or included therein or delivered pursuant thereto contained, or, when taken as a 
whole, contains, or shall contain, any material misstatement of fact or, when taken together with all other such information or documents, omitted, omits or 
shall omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were, are or shall be made, 
not materially misleading at the time such statement was made or deemed made.  Additionally, any and all financial or business projections provided by a 
Borrower to Agent, whether prior to or after the Closing Date, shall be (i) provided in good faith and based on the most current data and information 
available to Borrower, and (ii) the most current of such projections provided to Borrower’s Board (it being understood that the projections and forecasts 
provided by Borrower in good faith and based upon reasonable assumptions are not viewed as facts, that such projections are subject to significant 
uncertainties and contingencies, many of which are beyond the control of Borrower, that no assurance is given that any particular projections will be 
realized, and that actual results during the period or periods covered by such projections and forecasts may differ from the projected or forecasted results).

h.

Tax Matters.  Except as set forth on Schedule 5.8, (a) Borrower and its Subsidiaries have filed all federal and state income Tax returns 

and other material Tax returns that they are required to file, (b) Borrower and its Subsidiaries have duly paid all federal and state income Taxes and other 
material Taxes or installments thereof that they are required to pay, except Taxes being contested in good faith by appropriate proceedings and for which 
Borrower and its Subsidiaries maintain adequate reserves in accordance with GAAP, and (c) to the best of Borrower’s knowledge, no proposed or pending 
Tax assessments, deficiencies, audits or other proceedings with respect to Borrower or any Subsidiary have had, or could reasonably be expected to have, 
individually or in the aggregate, a Material Adverse Effect.

i.

Intellectual Property Claims. Except for Permitted Liens, Borrower is the sole owner of, or otherwise has the right to use, the 

Intellectual Property material to Borrower’s business.  Except as described on Schedule 5.11, each of the material Copyrights, Trademarks and Patents is 
valid and enforceable, no material part of the Intellectual Property has been judged invalid or unenforceable, in whole or in part, and, to Borrower’s 
knowledge, no claim has been made to Borrower that any material part of the Intellectual Property violates the rights of any third party.  Exhibit C is a true, 
correct and complete list of each of Borrower’s Patents, registered Trademarks, registered Copyrights, and material agreements under which Borrower 
licenses Intellectual Property from third parties (other than shrink-wrap software licenses), together with application or registration numbers, as applicable, 
owned by Borrower or any Subsidiary, in each case as of the Closing Date.  Borrower is not in breach of, nor has Borrower 

212788652 v9 

263757953 v7

22

 
 
failed to perform any obligations under, any of the foregoing contracts, licenses or agreements, except as could not reasonably be expected to result, 
individually or in the aggregate, in a Material Adverse Effect and, to Borrower’s knowledge, no third party to any such contract, license or agreement is in 
breach thereof or has failed to perform any obligations thereunder, except as could not reasonably be expected to result, individually or in the aggregate, in 
a Material Adverse Effect.

j.

Intellectual Property.  

i.

Borrower has all material rights with respect to Intellectual Property necessary or material in the operation or conduct of 

Borrower’s business as currently conducted and proposed to be conducted by Borrower.  Without limiting the generality of the foregoing, and in 
the case of Licenses, except for restrictions that are unenforceable under Division 9 of the UCC or restrictions that are permitted hereunder, 
Borrower has the right, to the extent required to operate Borrower’s business, to freely transfer, license or assign Intellectual Property owned by 
Borrower and necessary or material in the operation or conduct of Borrower’s business as currently conducted and proposed to be conducted by 
Borrower, without condition, restriction or payment of any kind (other than license payments in the ordinary course of business) to any third 
party.  Borrower owns or has the right to use, pursuant to valid licenses, all software development tools, library functions, compilers and all other 
third-party software and other items that are material to Borrower’s business and used in the design, development, promotion, sale, license, 
manufacture, import, export, use or distribution of Products except customary covenants in license agreements, joint venture or strategic alliances 
(to the extent such joint ventures or strategic alliances are Permitted Investments) and equipment leases where Borrower is the licensee or lessee. 

ii.

No material software or other material materials used by Borrower or any of its Subsidiaries (or used in any Products or any 
Subsidiaries’ products) are subject to an open-source or similar license (including but not limited to the General Public License, Lesser General 
Public  License,  Mozilla  Public  License,  or  Affero  License)  in  a  manner  that  would  cause  such  software  or  other  materials  to  have  to  be  (i) 
distributed to third parties at no charge or a minimal charge (royalty-free basis); (ii) licensed to third parties to modify, make derivative works 
based on, decompile, disassemble, or reverse engineer; or (iii) used in a manner that does could require disclosure or distribution in source code 
form.

k.

Products.  Except as set forth on Schedule 5.11, no material Intellectual Property owned by Borrower or Product has been or is subject 

to any actual or, to the knowledge of Borrower, threatened litigation, proceeding (including any proceeding in the United States Patent and Trademark 
Office or any corresponding foreign office or agency) or outstanding decree, order, judgment, settlement agreement or stipulation that restricts in any 
manner Borrower’s use, transfer or licensing thereof or that may affect the validity, use or enforceability thereof.  There is no decree, order, judgment, 
agreement, stipulation, arbitral award or other provision entered into in connection with any litigation or proceeding that obligates Borrower to grant 
licenses or ownership interest in any future Intellectual Property related to the operation or conduct of the business of Borrower or Products.  Borrower has 
not received any written notice or claim, or, to the knowledge of Borrower, oral notice or claim, challenging or questioning Borrower’s ownership in any 
material Intellectual Property (or written notice of any claim challenging or questioning the ownership in any licensed Intellectual Property of the owner 
thereof) or suggesting that any third party has any claim of legal or beneficial ownership with respect thereto nor, to Borrower’s knowledge, is there a 
reasonable basis for any such claim.  To Borrower’s knowledge, neither Borrower’s use of its material Intellectual Property nor the production and sale of 
Products materially infringes the Intellectual Property or other rights of others. 

l.

Financial Accounts.  Exhibit D, as may be updated by Borrower in a written notice provided to Agent after the Closing Date, is a true, 

correct and complete list of (a) all banks and other financial institutions at which Borrower or any Subsidiary maintains Deposit Accounts and (b) all 
institutions at which Borrower or any Subsidiary maintains an account holding Investment Property, and such exhibit correctly identifies the name, address 
and telephone number of each bank or other institution, the name in which the account is held, a description of the purpose of the account, and the complete 
account number therefor.

212788652 v9 

263757953 v7

23

 
 
m.

Employee Loans.  Other than loans constituting Permitted Investments, Borrower has no outstanding loans to any employee, officer or 

director of Borrower nor has Borrower guaranteed the payment of any loan made to an employee, officer or director of Borrower by a third party.

n.

Subsidiaries.  Borrower does not own any stock, partnership interest or other securities of any Person, except for Permitted 

Investments.  Attached as Schedule 5.14, as may be updated by Borrower in a written notice provided after the Closing Date, is a true, correct and complete 
list of each Subsidiary.

6.
INSURANCE; INDEMNIFICATION

a.

Coverage.  Borrower shall cause to be carried and maintained commercial general liability insurance covering Borrower and each of its 

Subsidiaries, on an occurrence form, against risks customarily insured against in Borrower’s line of business.  Such risks shall include the risks of bodily 
injury, including death, property damage, personal injury, advertising injury, and contractual liability per the terms of the indemnification agreement found 
in Section 6.3.  Borrower shall maintain a minimum of $2,000,000 of commercial general liability insurance for each occurrence.  Borrower maintains and 
shall continue to maintain a minimum of $2,000,000 of directors’ and officers’ insurance for each occurrence and $5,000,000 in the aggregate.  So long as 
there any Secured Obligations outstanding, Borrower shall maintain insurance upon the business and assets of Borrower and its Subsidiaries, insuring 
against all risks of physical loss or damage howsoever caused, in an amount not less than the full replacement cost of the Collateral, provided that such 
insurance may be subject to standard exceptions and deductibles.  .  If Borrower fails to obtain the insurance called for by this Section 6.1 or fails to pay 
any premium thereon or fails to pay any other amount which Borrower is obligated to pay under this Agreement or any other Loan Document or which 
may be required to preserve the Collateral, Agent may obtain such insurance or make such payment, and all amounts so paid by Agent are immediately due 
and payable, bearing interest at the then highest rate applicable to the Secured Obligations, and secured by the Collateral.  Agent will make reasonable 
efforts to provide Borrower with notice of Agent obtaining such insurance at the time it is obtained or within a reasonable time thereafter.  No payments by 
Agent are deemed an agreement to make similar payments in the future or Agent’s waiver of any Event of Default.

b.

Certificates.  Borrower shall deliver to Agent certificates of insurance that evidence compliance with its insurance obligations in 

Section 6.1 and the obligations contained in this Section 6.2.  Borrower’s insurance certificate shall reflect Agent (shown as “Hercules Capital, Inc., as 
Agent, and its successors and/or assigns”) as an additional insured for commercial general liability, and a lenders loss payable for property insurance and 
additional insured for liability insurance for any future insurance that Borrower may acquire from such insurer.  Attached to the certificates of insurance 
will be additional insured endorsements for liability and lender’s loss payable endorsements for all risk property damage insurance.  All certificates of 
insurance shall provide for a minimum of thirty (30) days’ advance written notice to Agent of cancellation (other than cancellation for non-payment of 
premiums, for which ten (10) days’ advance written notice shall be sufficient) or any other change adverse to Agent’s interests.  Any failure of Agent to 
scrutinize such insurance certificates for compliance is not a waiver of any of Agent’s rights, all of which are reserved.  Upon Agent’s reasonable request, 
Borrower shall provide Agent with copies of each insurance policy, and upon entering or amending any insurance policy required hereunder, Borrower 
shall provide Agent with copies of such policies and shall promptly deliver to Agent updated insurance certificates with respect to such policies.

c.

Indemnity.  Borrower agrees to indemnify and hold Agent, Lenders and their officers, directors, employees, agents, in-house attorneys, 

representatives and shareholders (each, an “Indemnified Person”) harmless from and against any and all claims, costs, expenses, damages and liabilities 
(including such claims, costs, expenses, damages and liabilities based on liability in tort, including strict liability in tort), including reasonable attorneys’ 
fees and disbursements and other costs of investigation or defense (including those incurred upon any appeal) (collectively, “Liabilities”), that may be 
instituted or asserted against or incurred by such Indemnified Person as the result of credit having been extended, suspended or terminated under this 
Agreement and the other Loan Documents or the administration of such credit, or in connection with or arising out of the transactions contemplated 
hereunder and thereunder, or any actions or failures to act in connection therewith, or arising out of the disposition or 

212788652 v9 

263757953 v7

24

 
 
utilization of the Collateral, excluding in all cases Liabilities to the extent resulting solely from any Indemnified Person’s gross negligence or willful 
misconduct.  This Section 6.3 shall not apply with respect to Taxes other than any Taxes that represent losses, claims, damages, etc. arising from any non-
Tax claim.  In no event shall any Indemnified Person be liable on any theory of liability for any special, indirect, consequential or punitive damages 
(including any loss of profits, business or anticipated savings).  This Section 6.3 shall survive the repayment of indebtedness under, and otherwise shall 
survive the expiration or other termination of, the Loan Agreement, in each case subject to the applicable statute of limitations.

Borrower agrees as follows:  

7.
COVENANTS 

a.

Financial Reports.  Borrower shall furnish to Agent the financial statements and reports listed hereinafter (the “Financial Statements”):

i.

as soon as practicable (and in any event within 30 days) after the end of each month, unaudited interim and year-to-date 
financial statements as of the end of such month (prepared on a consolidated basis), including balance sheet and related statement of income 
accompanied by a report detailing any material contingencies (including the commencement of any material litigation by or against Borrower) or 
any other occurrence that could reasonably be expected to have a Material Adverse Effect, all certified by Borrower’s Chief Executive Officer or 
Chief Financial Officer to the effect that they have been prepared in accordance with GAAP, (i) except for the absence of footnotes, (ii) subject to 
normal year-end adjustments, and (iii) except for certain non-cash items that are customarily included in quarterly and annual financial 
statements;

ii.

as soon as practicable (and in any event within 45 days) after the end of each calendar quarter, unaudited interim and year-
to-date financial statements as of the end of such calendar quarter (prepared on a consolidated basis, if applicable), including balance sheet and 
related statements of income and cash flows accompanied by a report detailing any material contingencies (including the commencement of any 
material litigation by or against Borrower) or any other occurrence that could reasonably be expected to have a Material Adverse Effect, certified 
by Borrower’s Chief Executive Officer or Chief Financial Officer or another authorized executive of Borrower to the effect that they have been 
prepared in accordance with GAAP, (i) except for the absence of footnotes, and (ii) subject to normal year-end adjustments;

iii.

as soon as practicable (and in any event within 90 days) after the end of each fiscal year, unqualified (other than as to going 
concern qualification) audited financial statements as of the end of such year (prepared on a consolidated and consolidating basis, if applicable), 
including balance sheet and related statements of income and cash flows, and setting forth in comparative form the corresponding figures for the 
preceding fiscal year, certified by a firm of independent certified public accountants selected by Borrower and reasonably acceptable to Agent, 
accompanied by any management report from such accountants;

Exhibit E;

iv.

v.

as soon as practicable (and in any event within 30 days) after the end of each month, a Compliance Certificate in the form of 

as soon as practicable (and in any event within 30 days) after the end of each month, a report showing agings of accounts 

receivable and accounts payable;

vi.

promptly after the sending or filing thereof, as the case may be, copies of any proxy statements, financial statements or 

reports that Borrower has made available to holders of its preferred stock, and copies of any regular, periodic and special reports or registration 
statements that Borrower files with the Securities and Exchange Commission or any governmental authority that may be substituted therefor, or 
any national securities exchange;

212788652 v9 

263757953 v7

25

 
 
vii.

promptly following each meeting of the Board, copies of all presentation materials that Borrower provides to its directors in 

connection with meetings of the board of directors, provided that in all cases Borrower may exclude any information or materials related to 
executive compensation, confidential information, any attorney-client privileged information and any information that would raise a conflict of 
interest with Agent or Lenders;

viii.

financial and business projections promptly following their approval by Borrower’s Board, and in any event, 60 days after 

the end of Borrower’s fiscal year, as well as budgets, operating plans and other financial information reasonably requested by Agent;

ix.

insurance renewal statements, annually or otherwise upon promptly upon renewal of insurance policies required to be 

maintained in accordance with Section 6.1, and;

x.

prompt (but in any event no more than 3 Business Days) notice if Borrower or any Subsidiary has knowledge that Borrower, 

or any Subsidiary or controlled Affiliate of Borrower, is listed on the OFAC Lists or (a) is convicted on, (b) pleads nolo contendere to, (c) is 
indicted on, or (d) is arraigned and held over on charges involving money laundering or predicate crimes to money laundering.; and

vi.

prompt (but in any event no more than 4 Business Days) notice of (i) any new material collaboration agreement or license 
agreement to which Borrower or any Subsidiary is a party to, or any material amendment or modification thereto, or (ii) the occurrence of any 
event or circumstance giving rise to a right on the part of a counterparty to a material collaboration agreement or license agreement, to terminate 
or exercise other remedies or similar rights in lieu of termination following a breach by Borrower or any Subsidiary thereof.

Borrower shall not make any change in its (a) accounting policies or reporting practices (other than as permitted under GAAP or pursuant to 

applicable securities laws or regulations of the SEC), or (b) fiscal years or fiscal quarters.  The fiscal year of Borrower shall end on December 31.

The executed Compliance Certificate, all Financial Statements required to be delivered pursuant to clauses (a), (b) and (c) above shall be sent via 
e-mail to financialstatements@htgc.com with a copy to legal@htgc.com and kkosofsky@htgc.com, provided, that if e-mail is not available or sending such 
Financial Statements via e-mail is not possible, they shall be faxed to Agent at: (650) 473-9194, attention Account Manager: Seres Therapeutics, Inc.

Notwithstanding the foregoing, documents required to be delivered hereunder (to the extent any such documents are included in materials 

otherwise filed with the SEC) may be delivered electronically and if so delivered, shall be deemed to have been delivered on the date on which Borrower 
makes such documents or materials publically available.

b.

Management Rights.  Borrower shall permit any representative that Agent or Lenders authorizes, including its attorneys and 

accountants, to inspect the Collateral and examine and make copies and abstracts of the books of account and records of Borrower at reasonable times and 
upon reasonable notice during normal business hours; provided, however, that so long as no Event of Default has occurred and is continuing, such 
examinations shall be limited to no more often than once per fiscal year.  In addition, any such representative shall have the right to meet with management 
and officers of Borrower to discuss such books of account and records at reasonable times and upon reasonable notice.  In addition, Agent or Lenders shall 
be entitled at reasonable times and intervals to consult with and advise the management and officers of Borrower concerning significant business issues 
affecting Borrower.  Such consultations shall not unreasonably interfere with Borrower’s business operations.  The parties intend that the rights granted 
Agent and Lenders shall constitute “management rights” within the meaning of 29 C.F.R. Section 2510.3-101(d)(3)(ii), but that any advice, 
recommendations or participation by Agent or Lenders with respect to any business issues shall not be deemed to give Agent or any Lender, nor be deemed 
an exercise by Agent or any Lender of, control over Borrower’s management or policies.

212788652 v9 

263757953 v7

26

 
 
c.

Further Assurances.  Borrower shall, and shall cause each other Loan Party to, from time to time execute, deliver and file, alone or with 

Agent, any financing statements, security agreements, collateral assignments, notices, control agreements, promissory notes or other documents to perfect 
or give the highest priority to Agent’s Lien on the Collateral or otherwise evidence Agent’s rights herein, in each case as reasonably requested by Agent.  
Borrower shall, from time to time procure any instruments or documents as may be reasonably requested by Agent, and take all further action that may be 
necessary, or that Agent may reasonably request, to perfect and protect the Liens granted hereby or pursuant to applicable Loan Documents.  In addition, 
and for such purposes only, Borrower hereby authorizes Agent to execute and deliver on behalf of Borrower and to file such financing statements 
(including an indication that the financing statement covers “all assets or all personal property” of Borrower in accordance with Section 9-504 of the UCC), 
without the signature of Borrower, either in Agent’s name or in the name of Agent as agent and attorney-in-fact for Borrower.  Borrower shall in good faith 
and in its reasonable commercial discretion, in each case subject to the terms of this Agreement, protect and defend its title to the Collateral and Agent’s 
Lien thereon against all Persons claiming any interest adverse to Borrower or Agent other than Permitted Liens.

d.

Indebtedness.  Borrower shall not create, incur, assume, guarantee or be or remain liable with respect to any Indebtedness, and shall not 
permit any Subsidiary to do so, other than Permitted Indebtedness, or prepay any Indebtedness or take any actions which impose on Borrower an obligation 
to prepay any Indebtedness, except (a) for the conversion of Indebtedness into equity securities and the payment of cash in lieu of fractional shares in 
connection with such conversion, (b) for purchase money Indebtedness pursuant to its then applicable payment schedule or with other purchase money 
Indebtedness permitted hereunder, (c) for prepayment (i) by any Loan Party or Subsidiary of intercompany Indebtedness owed to Borrower, or (ii) by any 
Subsidiary that is not a Loan Party of intercompany Indebtedness owed by such Subsidiary to another Subsidiary that is not a Loan Party, or (d) as may be 
permitted under any Subordination Agreement, (e) as otherwise permitted hereunder or approved in writing by Agent, and (f) Permitted Indebtedness with 
the proceeds of other Permitted Indebtedness.  Notwithstanding anything to the contrary herein, so long as (i) no Event of Default has occurred and is 
continuing, (ii) Borrower has used commercially reasonable efforts to use the proceeds of the PPP Loan in a manner that allows for the maximum amount 
of forgiveness of Indebtedness under the PPP Loan and (iii) Borrower has made a timely request (and in any event, prior to the first amortization payment) 
to the lender under the PPP Loan for forgiveness of the maximum amount of Indebtedness eligible for forgiveness thereunder, then Borrower may make 
payments of principal and interest on the PPP Loan in accordance with the amortization schedule thereunder. 

Notwithstanding anything to the contrary in the foregoing, the issuance of, performance of obligations under (including any payments of 
interest), and conversion, exercise, repurchase, redemption (including, for the avoidance of doubt, a required repurchase in connection with the redemption 
of Permitted Convertible Debt upon satisfaction of a condition related to the stock price of Borrower’s common stock), settlement or early termination or 
cancellation of (whether in whole or in part and including by netting or set-off) (in each case, whether in cash, common stock of Borrower or, following a 
merger event or other change of the common stock of Borrower, other securities or property), or the satisfaction of any condition that would permit or 
require any of the foregoing, any Permitted Convertible Debt shall not constitute a prepayment of Indebtedness by Borrower for the purposes of this 
Section 7.4 provided that principal payments in cash (other than cash in lieu of fractional shares) shall only be allowed with respect to any repurchase in 
connection with the redemption of Permitted Convertible Debt upon satisfaction of a condition related to the stock price of Borrower’s common stock if the 
Redemption Conditions are satisfied in respect of such redemption and at all times after such redemption.  

e.

Collateral.  Borrower shall at all times keep the Collateral, the Intellectual Property and all other property and assets used in 

Borrower’s business or in which Borrower now or hereafter holds any interest free and clear from Liens whatsoever (except for Permitted Liens), and shall 
give Agent prompt written notice of any legal process that is reasonably likely to result in damages, expenses or liabilities in excess of $500,0001,500,000 
affecting the Collateral, the Intellectual Property, such other property or assets, or any Liens thereon, provided however, that the Collateral and such other 
property and assets may be subject to Permitted Liens except that there shall be no Liens whatsoever on Intellectual Property.  Borrower shall not agree 
with any Person other than Agent or Lenders not to encumber its property other than in connection with Permitted Liens.  Borrower shall not enter into or 
suffer to exist or become effective any agreement that prohibits or limits the ability of Borrower to create, incur, 

212788652 v9 

263757953 v7

27

 
 
assume or suffer to exist any Lien upon any of its property (including Intellectual Property), whether now owned or hereafter acquired, to secure its 
obligations under the Loan Documents to which it is a party other than (a) this Agreement and the other Loan Documents, (b) any agreements governing 
any purchase money Liens or capital lease obligations otherwise permitted hereby (in which case, any prohibition or limitation shall only be effective 
against the assets financed thereby) and (c) customary restrictions on the assignment of leases, licenses and other agreements.  Borrower shall cause each of 
its Subsidiaries to protect and defend such Subsidiary’s title to its assets from and against all Persons claiming any interest adverse to such Subsidiary, and 
Borrower shall cause each of its Subsidiaries at all times to keep such Subsidiary’s property and assets free and clear from Liens whatsoever (except for 
Permitted Liens), and shall give Agent prompt written notice of any legal process that is reasonably likely to result in damages, expenses or liabilities in 
excess of $500,0001,500,000. 

f.

Investments.  Borrower shall not, directly or indirectly acquire or own, or make any Investment in or to any Person, nor permit any of 

its Subsidiaries so to do, other than Permitted Investments. 

Notwithstanding the foregoing, and for the avoidance of doubt, this Section 7.6 shall not prohibit the conversion by holders of (including any 

cash payment upon conversion), or required payment of any principal or premium on (including, for the avoidance of doubt, in respect of a required 
repurchase in connection with the redemption of Permitted Convertible Debt upon satisfaction of a condition related to the stock price of Borrower’s 
common stock) or required payment of any interest with respect to, any Permitted Convertible Debt in each case, in accordance with the terms of the 
indenture governing such Permitted Convertible Debt, provided that principal payments in cash (other than cash in lieu of fractional shares) shall be 
allowed with respect to any repurchase in connection with the redemption of Permitted Convertible Debt upon satisfaction of a condition related to the 
stock price of Borrower’s common stock only if the Redemption Conditions are satisfied in respect of such redemption and at all times after such 
redemption..

Notwithstanding the foregoing, Borrower may repurchase, exchange or induce the conversion of Permitted Convertible Debt by delivery of 

shares of Borrower’s common stock and/or a different series of Permitted Convertible Debt and/or by payment of cash (in an amount that does not exceed 
the proceeds received by Borrower from the substantially concurrent issuance of shares of Borrower’s common stock and/or Permitted Convertible Debt 
plus the net cash proceeds, if any, received by Borrower pursuant to the related exercise or early unwind or termination of the related Permitted Bond 
Hedge Transactions and Permitted Warrant Transactions, if any, pursuant to the immediately following proviso); provided that, for the avoidance of doubt, 
substantially concurrently with, or a commercially reasonable period of time before or after, the related settlement date for the Permitted Convertible Debt 
that are so repurchased, exchanged or converted, Borrower may exercise or unwind or terminate early (whether in cash, shares or any combination thereof) 
the portion of the Permitted Bond Hedge Transactions and Permitted Warrant Transactions, if any, corresponding to such Permitted Convertible Debt that 
are so repurchased, exchanged or converted.

g.

Distributions.  Borrower shall not, nor shall it permit any Subsidiary to, (a) repurchase or redeem any class of stock or other Equity 
Interest other than repurchases described in clause (c) of the defined term “Permitted Investments”; (b) declare or pay any cash dividend or make a cash 
distribution on any class of stock or other Equity Interest, except that a Subsidiary of Borrower may pay dividends or make distributions to Borrower or a 
Subsidiary of Borrower; (c) lend money to any employees, officers or directors or guarantee the payment of any such loans granted by a third party in 
excess of $500,0001,500,000 in the aggregate; or (d) waive, release or forgive any Indebtedness owed by any employees, officers or directors in excess of 
$500,0001,500,000 in the aggregate.

Notwithstanding the foregoing, and for the avoidance of doubt, this Section 7.7 shall not prohibit (i) the conversion by holders of (including any 

cash payment upon conversion), or required payment of any principal or premium on (including, for the avoidance of doubt, in respect of a required 
repurchase in connection with the redemption of Permitted Convertible Debt upon satisfaction of a condition related to the stock price of Borrower’s 
common stock) or required payment of any interest with respect to, any Permitted Convertible Debt in each case, in accordance with the terms of the 
indenture governing such Permitted Convertible Debt or (ii) the entry into (including the payment of premiums in connection therewith) or any required 
payment with respect to, or required early unwind or settlement of, any Permitted Bond Hedge Transaction or Permitted Warrant Transaction, in each 

212788652 v9 

263757953 v7

28

 
 
case, in accordance with the terms of the agreement governing such Permitted Bond Hedge Transaction or Permitted Warrant Transaction. 

Notwithstanding the foregoing, Borrower may repurchase, exchange or induce the conversion of Permitted Convertible Debt by delivery of 

shares of Borrower’s common stock and/or a different series of Permitted Convertible Debt and/or by payment of cash (in an amount that does not exceed 
the proceeds received by Borrower from the substantially concurrent issuance of shares of Borrower’s common stock and/or Refinancing Convertible 
Notes plus the net cash proceeds, if any, received by Borrower pursuant to the related exercise or early unwind or termination of the related Permitted Bond 
Hedge Transactions and Permitted Warrant Transactions, if any, pursuant to the immediately following proviso); provided that, for the avoidance of doubt, 
substantially concurrently with, or a commercially reasonable period of time before or after, the related settlement date for the Permitted Convertible Debt 
that are so repurchased, exchanged or converted, Borrower may exercise or unwind or terminate early (whether in cash, shares or any combination thereof) 
the portion of the Permitted Bond Hedge Transactions and Permitted Warrant Transactions, if any, corresponding to such Permitted Convertible Debt that 
are so repurchased, exchanged or converted.

h.

Transfers.  Except for Permitted Transfers, Borrower shall not, and shall not permit any Subsidiary to, voluntarily or involuntarily 
transfer, sell, lease, license, lend or in any other manner convey any equitable, beneficial or legal interest in any material portion of its assets (including 
Cash).

i.

Mergers or Acquisitions.  Borrower shall not merge or consolidate, nor permit any of its Subsidiaries to merge or consolidate, with or 

into any other business organization, other than mergers or consolidations of (a) a Subsidiary which is not a Loan Party into another Subsidiary or into a 
Loan Party, or (b) a Loan Party into another Loan Party (provided that Borrower shall be the surviving entity in any transaction involving Borrower), or 
acquire, or permit any of its Subsidiaries to acquire, in each case including for the avoidance of doubt through a merger, purchase, in-licensing arrangement 
or any similar transaction, all or substantially all of the capital stock or property of another Person, provided however, that Borrower shall be permitted to 
enter into Permitted Acquisitions.

j.

Taxes.  Borrower shall, and shall cause each of its Subsidiaries to, pay when due all material Taxes of any nature whatsoever now or 

hereafter imposed or assessed against Borrower or such Subsidiary or the Collateral or upon Borrower’s (or such Subsidiary’s) ownership, possession, use, 
operation or disposition thereof or upon Borrower’s (or such Subsidiary’s) rents, receipts or earnings arising therefrom.  Borrower shall, and shall cause 
each of its Subsidiaries to accurately file on or before the due date therefor (taking into account proper extensions) all federal and state income Tax returns 
and other material Tax returns required to be filed.  Notwithstanding the foregoing, Borrower and its Subsidiaries may contest, in good faith and by 
appropriate proceedings diligently conducted, Taxes for which Borrower and its Subsidiaries maintain adequate reserves in accordance with GAAP.

k.

Certain Changes.  Neither Borrower nor any Subsidiary shall change its jurisdiction of organization, organizational form or legal name 
without twenty (20) days’ prior written notice to Agent.  Neither Borrower nor any Subsidiary shall suffer a Change in Control.  Neither Borrower nor any 
Subsidiary shall relocate its chief executive office or its principal place of business unless: (i) it has provided prior written notice to Agent; and (ii) such 
relocation shall be within the continental United States of America.  Neither Borrower nor any Subsidiary shall relocate any item of Collateral (other than 
(x) sales of Inventory in the ordinary course of business, (y) relocations of Equipment within the United States having an aggregate value of up to 
$1,500,0002,500,000 in any fiscal year, and (z) relocations of Collateral from a location described on Exhibit Bin the Perfection Certificate to another 
location described on Exhibit Btherein) unless (i) it has provided prompt written notice to Agent, (ii) such relocation is within the continental United States 
of America and, (iii) if such relocation is to a third party bailee, it has used commercially reasonable efforts to deliver a bailee agreement in form and 
substance reasonably acceptable to Agent.

l.

Deposit Accounts.  Subject to Section 4.4, other than Excluded Accounts, neither Borrower nor any Subsidiary (other than an Excluded 

Subsidiary) shall maintain any Deposit Accounts, or accounts holding Investment Property, except with respect to which Agent has an Account Control 
Agreement.

212788652 v9 

263757953 v7

29

 
 
m.

Joinder of Subsidiaries; Limitation on Foreign Subsidiaries.  Borrower shall notify Agent of each Subsidiary formed subsequent to the 

Closing Date and, within 20 days of formation, shall cause any such Domestic Subsidiary (other than an Excluded Subsidiary) to execute and deliver to 
Agent a Joinder Agreement, or, if requested by Agent, a Guaranty and appropriate collateral security documents to secure the obligations pursuant to such 
Guaranty.  Borrower shall not permit Foreign Subsidiaries to maintain Cash balances in excess of $500,0001,500,000 at any time.

n.
Conditions at all times.

MSC Investment Conditions.  At any time that the MSC Subsidiary holds any Cash, Borrower shall satisfy the MSC Investment 

o.
of any Event of Default.

Notification of Event of Default.  Borrower shall notify Agent promptly, in any event within three (3) Business Days, of the occurrence 

p.

SBA Addendum.  One or more affiliates of Agent have received a license from the U.S. Small Business Administration (“SBA”) to 
extend loans as a small business investment company (“SBIC”) pursuant to the Small Business Investment Act of 1958, as amended, and the associated 
regulations (collectively, the “SBIC Act”).  Portions of the Loan to Borrower may be made by a Lender that is an SBIC.  Addendum 2 to this Agreement 
outlines various responsibilities of Agent, each Lender and Borrower associated with a loan made by an SBIC, and such Addendum 2 is hereby 
incorporated in this Agreement.

q.

Use of Proceeds.  Borrower agrees that the proceeds of the Loans shall be used solely to pay related fees and expenses in connection 
with this Agreement and for working capital and general business purposes.  The proceeds of the Loans shall not be used in violation of Anti-Corruption 
Laws or applicable Sanctions.

r.

Compliance with Laws.

i.

Borrower shall maintain, and shall cause each of its Subsidiaries to maintain compliance in all material respects with all 

applicable laws, rules or regulations, and shall, or cause its Subsidiaries to, obtain and maintain all required governmental authorizations, 
approvals, licenses, franchises, permits or registrations reasonably necessary in connection with the conduct of Borrower’s business.  Borrower 
shall not become an “investment company” or a company controlled by an “investment company”, under the Investment Company Act of 1940, 
as amended, or undertake as one of its important activities extending credit to purchase or carry margin stock (as defined in Regulation X, T and 
U of the Federal Reserve Board of Governors).

ii.

Neither Borrower nor any of its Subsidiaries shall, nor shall Borrower or any of its Subsidiaries permit any controlled 

Affiliate to, directly or indirectly, knowingly enter into any documents, instruments, agreements or contracts with any Person listed on the OFAC 
Lists.  Neither Borrower nor any of its Subsidiaries shall, nor shall Borrower or any of its Subsidiaries permit any controlled Affiliate to, directly 
or indirectly, (i) conduct any business or engage in any transaction or dealing with any Blocked Person, including, without limitation, the making 
or receiving of any contribution of funds, goods or services to or for the benefit of any Blocked Person, (ii) deal in, or otherwise engage in any 
transaction relating to, any property or interests in property blocked pursuant to Executive Order No. 13224 or any similar executive order or 
other Anti‑Terrorism Law, or (iii) engage in or conspire to engage in any transaction that evades or avoids, or has the purpose of evading or 
avoiding, or attempts to violate, any of the prohibitions set forth in Executive Order No. 13224 or other Anti‑Terrorism Law.

iii.

Borrower has implemented and shall maintain in effect policies and procedures designed to reasonably ensure compliance 

by Borrower and its Subsidiaries and their respective directors, officers, employees and agents with Anti-Corruption Laws and applicable 
Sanctions, and Borrower and its Subsidiaries and their respective officers and employees and to the knowledge Borrower, its directors and 
agents, are in compliance with Anti-Corruption Laws and applicable Sanctions in all material respects

212788652 v9 

263757953 v7

30

 
 
iv.

Neither Borrower nor its Subsidiaries nor any of their respective directors, officers or employees, or to the knowledge of 
Borrower, any agent for Borrower or any of its Subsidiaries that shall act in any capacity in connection with or benefit from the credit facility 
established hereby, is a Sanctioned Person.  No Loan, use of proceeds or other transaction contemplated by this Agreement shall violate Anti-
Corruption Laws or applicable Sanctions.

s.

Financial Covenant – Minimum Cash.  

vii.

If the Regulatory Approval Milestone has not been achieved on or prior to June 15, 2023, then on June 15, 2023 and at all 
times thereafter until the Regulatory Approval Milestone has been achieved, Borrower shall maintain Unrestricted Cash in an amount not less 
than $35,000,000, provided that if the Regulatory Approval Milestone is achieved, the foregoing covenant shall permanently cease to apply. 

(a) On the earlier of (i) October 31, 2020 (or if Performance Milestone I has been achieved, December 31, 2020) or (ii) the date of the 
announcement of Phase 2b ECORESET data and at all times thereafter, Borrower shall maintain Unrestricted Cash in amounts not less than the 
applicable amount, determined by reference to the schedule below:

Milestones Achieved

Performance Milestone I achieved;
Performance Milestone II achieved

Performance Milestone I failed; 
Performance Milestone II achieved

Performance Milestone I achieved; 
Performance Milestone II failed

Performance Milestone I failed; 
Performance Milestone II failed

Minimum Cash Required

$0

$10,000,000

$12,500,000

$20,000,000

Notwithstanding the foregoing, for so long as Borrower’s Market Capitalization is greater than $350,000,000, this Section 7.19(a) shall not apply.  

i.

In the event Borrower makes a redemption or other cash payment in respect of Permitted Convertible Debt subject to 

satisfaction of the Redemption Conditions, or enters into a license agreement constituting a Permitted Transfer in accordance with clause (b)(iv)
(B) of the defined term “Permitted Transfer”, Borrower shall maintain Unrestricted Cash at all times in the amount required by the defined term 
“Redemption Conditions” or clause (b)(iv)(B) of the defined term “Permitted Transfer”, at all times. 

t.

Intellectual Property.  Borrower shall (i) protect, defend and maintain the validity and enforceability of its Intellectual Property in its 
good faith business judgment; (ii) promptly advise Agent in writing of material infringements of its Material Intellectual Property; and (iii) not allow any 
Material Intellectual Property material to Borrower’s business to be abandoned, forfeited or dedicated to the public without Agent’s written consent.  

u.

Transactions with Affiliates.  Borrower shall not, and shall not permit any Subsidiary to, directly or indirectly, enter into or permit to 
exist any transaction of any kind with any Affiliate of Borrower or such Subsidiary on terms that are less favorable to Borrower or such Subsidiary, as the 
case may be, than those that might be obtained in an arm’s length transaction from a Person who is not an Affiliate of Borrower or such Subsidiary, other 

212788652 v9 

263757953 v7

31

 
 
than (a) any equity investments in Borrower by existing investors of Borrower not constituting a Change of Control, or Subordinated Indebtedness, (b) any 
compensation, director indemnification or similar arrangements in the ordinary course of business of Borrower and as approved by Borrower’s Board, (c) 
any intercompany arrangements entered into in the ordinary course of business and not prohibited hereunder, or (d) any transaction otherwise permitted 
under this Article 7.

8.
[RESERVED.]

9.
EVENTS OF DEFAULT

The occurrence of any one or more of the following events shall be an Event of Default:

a.

Payments.  A Loan Party fails to (a) pay principal or interest on any Loan on its due date or (b) pay any other Secured Obligations 
within three (3) Business Days after the applicable due date; provided, however, that, in each case, an Event of Default shall not occur on account of a 
failure to pay due solely to an administrative or operational error of Agent or Lenders or Borrower’s bank if Borrower had the funds to make the payment 
when due and makes the payment within three (3) Business Days following Borrower’s knowledge of such failure to pay; or

b.

Covenants.  A Loan Party breaches or defaults in the performance of any covenant or Secured Obligation under this Agreement, or any 
of the other Loan Documents or any other agreement among any Loan Party, Agent and Lenders, and (a) with respect to a default under any covenant under 
this Agreement other than the Sections specifically identified in clause (b) hereof, any other Loan Document or any other agreement between any Loan 
Party and Agent or Lenders, and such default continues for more than fifteen (15) Business Days after the earlier of the date on which (i) Agent or Lenders 
has given notice of such default to Borrower and (ii) Borrower has actual knowledge of such default (provided that, with respect to a default due to a failure 
to comply with Section 7.12 with respect to any new account, Borrower shall be deemed to have knowledge of the default as of the time such account is 
opened) or (b) with respect to a default under any of Sections 4.4, 6, 7.1, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 7.14, 7.15, 7.17, 7.18, 7.19, 7.20 and 7.21, the 
occurrence of such default; or

c.

Material Adverse Effect.  A circumstance has occurred that could reasonably be expected to have a Material Adverse Effect; provided 
that the failure to achieve PerformanceRegulatory Approval Milestone I or Performance Milestone II shall not in and of itself constitute a Material Adverse 
Effect under this Section 9.3; or

d.

Representations.  Any representation or warranty made by any Loan Party in any Loan Document, when taken as a whole, shall have 

been false or misleading in any material respect when made or when deemed made; or

e.

Insolvency.  Any Loan Party (i) (A) shall make an assignment for the benefit of creditors; or (B) shall be unable to pay its debts as they 

become due; or (C) shall file a voluntary petition in bankruptcy; or (D) shall file any petition, answer, or document seeking for itself any reorganization, 
arrangement, composition, readjustment, liquidation, dissolution or similar relief under any present or future statute, law or regulation pertinent to such 
circumstances; or (E) shall seek or consent to or acquiesce in the appointment of any trustee, receiver, or liquidator of any Loan Party or of all or any 
substantial part (i.e. 33-1/3% or more) of the assets or property of any Loan Party; or (F) shall cease operations of its business as its business has normally 
been conducted, or terminate substantially all of its employees; or (G) any Loan Party or its directors or a majority of the holders of its Equity Interests 
shall take any action initiating any of the foregoing actions described in clauses (A) through (F); or (ii) either (A) forty-five (45) days shall have expired 
after the commencement of an involuntary action against any Loan Party seeking reorganization, arrangement, composition, readjustment, liquidation, 
dissolution or similar relief under any present or future statute, law or regulation, without such action being dismissed or all orders or proceedings 
thereunder affecting the operations or the business of any Loan Party being stayed; or (B) a stay of any such order or proceedings shall thereafter be set 
aside and the action setting it aside shall not be timely appealed; or (C) any Loan Party shall file any answer admitting or not contesting the material 
allegations of a petition filed against such Loan Party in any such proceedings; or (D) the court in which such proceedings are pending shall enter a decree 
or order 

212788652 v9 

263757953 v7

32

 
 
granting the relief sought in any such proceedings; or (E) forty-five (45) days shall have expired after the appointment, without the consent or acquiescence 
of any Loan Party, of any trustee, receiver or liquidator of such Loan Party or of all or any part of the properties of such Loan Party without such 
appointment being vacated; or

f.

Attachments; Judgments.  Any portion of any Loan Party’s assets in aggregate value of $500,0001,500,000 or more, is attached or 
seized, or a levy is filed against any such assets, or a judgment or judgments is/are entered for the payment of money (not covered by independent third 
party insurance as to which liability has not been rejected by such insurance carrier) individually or in the aggregate, of at least $500,0001,500,000, or any 
Loan Party is enjoined or in any way prevented by court order from conducting any part of its business; or

g.

Other Obligations.  The occurrence of any default under any agreement or obligation of any Loan Party involving any Indebtedness in 
excess of $500,0001,500,000, or any early payment is required or unwinding or termination occurs with respect to any Permitted Bond Hedge Transaction 
and Permitted Warrant Transaction, or any condition giving rise to the foregoing is met, in each case, with respect to which Borrower or its Affiliates is the 
“defaulting party” under the terms of such Permitted Bond Hedge Transaction or Permitted Warrant Transaction.

10.
REMEDIES

a.

General.  Upon and during the continuance of any one or more Events of Default, Agent may, and at the direction of the Required 
Lenders shall, accelerate and demand payment of all or any part of the Secured Obligations together with a Prepayment Charge and declare them to be 
immediately due and payable (provided, that upon the occurrence of an Event of Default of the type described in Section 9.5, all of the Secured Obligations 
(including, without limitation, the Prepayment Charge and the End of Term Charge) shall automatically be accelerated and made due and payable, in each 
case without any further notice or act).  Borrower hereby irrevocably appoints Agent as its lawful attorney-in-fact to:  exercisable following the occurrence 
of an Event of Default, (i) sign Borrower’s name on any invoice or bill of lading for any account or drafts against account debtors; (ii) demand, collect, sue, 
and give releases to any account debtor for monies due, settle and adjust disputes and claims about the accounts directly with account debtors, and 
compromise, prosecute, or defend any action, claim, case, or proceeding about any Collateral (including filing a claim or voting a claim in any bankruptcy 
case in Agent’s or Borrower’s name, as Agent may elect); (iii) make, settle, and adjust all claims under Borrower’s insurance policies; (iv) pay, contest or 
settle any Lien, charge, encumbrance, security interest, or other claim in or to the Collateral, or any judgment based thereon, or otherwise take any action to 
terminate or discharge the same; (v) transfer the Collateral into the name of Agent or a third party as the UCC permits; and (vi) receive, open and dispose 
of mail addressed to Borrower.  Borrower hereby appoints Agent as its lawful attorney-in-fact to sign Borrower’s name on any documents necessary to 
perfect or continue the perfection of Agent’s security interest in the Collateral regardless of whether an Event of Default has occurred until all Secured 
Obligations have been satisfied in full and the Loan Documents have been terminated.  Agent’s foregoing appointment as Borrower’s attorney in fact, and 
all of Agent’s rights and powers, coupled with an interest, are irrevocable until all Secured Obligations have been fully repaid and performed and the Loan 
Documents have been terminated.  Agent may, and at the direction of the Required Lenders shall, exercise all rights and remedies with respect to the 
Collateral under the Loan Documents or otherwise available to it under the UCC and other applicable law, including the right to release, hold, sell, lease, 
liquidate, collect, realize upon, or otherwise dispose of all or any part of the Collateral and the right to occupy, utilize, process and commingle the 
Collateral.  All Agent’s rights and remedies shall be cumulative and not exclusive.

b.

Collection; Foreclosure.  Upon the occurrence and during the continuance of any Event of Default, Agent may, and at the direction of 
the Required Lenders shall, at any time or from time to time, apply, collect, liquidate, sell in one or more sales, lease or otherwise dispose of, any or all of 
the Collateral, in its then condition or following any commercially reasonable preparation or processing, in such order as Agent may elect.  Any such sale 
may be made either at public or private sale at its place of business or elsewhere.  Borrower agrees that any such public or private sale may occur upon ten 
(10) calendar days’ prior written notice to Borrower.  Agent may require Borrower to assemble the Collateral and make it available to Agent at a place 
designated by Agent that is reasonably 

212788652 v9 

263757953 v7

33

 
 
convenient to Agent and Borrower.  The proceeds of any sale, disposition or other realization upon all or any part of the Collateral shall be applied by 
Agent in the following order of priorities:

First, to Agent and Lenders in an amount sufficient to pay in full Agent’s and Lenders’ reasonable costs and professionals’ and advisors’ 

fees and expenses as described in Section 11.11;

Second, to Lenders, ratably, in an amount equal to the then unpaid amount of the Secured Obligations (including principal, interest, subject 

to increase in accordance with Section 2.3), in such order and priority as Agent may choose in its sole discretion; and

Finally, after the full and final payment in Cash of all of the Secured Obligations (other than inchoate obligations), to any creditor holding a 

junior Lien on the Collateral, or to Borrower or its representatives or as a court of competent jurisdiction may direct.

Agent shall be deemed to have acted reasonably in the custody, preservation and disposition of any of the Collateral if it complies with the 
obligations of a secured party under the UCC.

c.

No Waiver.  Agent shall be under no obligation to marshal any of the Collateral for the benefit of Borrower or any other Person, and 

Borrower expressly waives all rights, if any, to require Agent to marshal any Collateral.

d.

Waivers.  Borrower waives demand, notice of default or dishonor, notice of payment and nonpayment, notice of any default, 

nonpayment at maturity, release, compromise, settlement, extension, or renewal of accounts, documents, instruments, chattel paper, and guarantees held by 
Agent on which Borrower is liable.

e.

Cumulative Remedies.  The rights, powers and remedies of Agent hereunder shall be in addition to all rights, powers and remedies 

given by statute or rule of law and are cumulative.  The exercise of any one or more of the rights, powers and remedies provided herein shall not be 
construed as a waiver of or election of remedies with respect to any other rights, powers and remedies of Agent.

11.
MISCELLANEOUS

a.

Severability.  Whenever possible, each provision of this Agreement shall be interpreted in such manner as to be effective and valid 

under applicable law, but if any provision of this Agreement shall be prohibited by or invalid under such law, such provision shall be ineffective only to the 
extent and duration of such prohibition or invalidity, without invalidating the remainder of such provision or the remaining provisions of this Agreement.

b.

Notice.  Except as otherwise provided herein, any notice, demand, request, consent, approval, declaration, service of process or other 
communication (including the delivery of Financial Statements) that is required, contemplated, or permitted under the Loan Documents or with respect to 
the subject matter hereof shall be in writing, and shall be deemed to have been validly served, given, delivered, and received upon the earlier of: (i) the day 
of transmission by electronic mail or hand delivery or delivery by an overnight express service or overnight mail delivery service; or (ii) the third calendar 
day after deposit in the United States of America mails, with proper first class postage prepaid, in each case addressed to the party to be notified as follows:

i.

If to Agent:

HERCULES CAPITAL, INC.
Legal Department
Attention:  Chief Legal Officer and Kristen Kosofsky
400 Hamilton Avenue, Suite 310
Palo Alto, CA 94301

34

212788652 v9 

263757953 v7

 
 
 
 
 
email: legal@htgc.com; kkosofsky@htgc.com
Telephone:  650-289-3060

ii.

If to Lenders:

HERCULES CAPITAL, INC. 
Legal Department
Attention:  Chief Legal Officer and Kristen Kosofsky
400 Hamilton Avenue, Suite 310
Palo Alto, CA  94301

email: legal@htgc.com; kkosofsky@htgc.com
Telephone:  650-289-3060

iii.

If to Borrower:

Seres Therapeutics, Inc.
Attention: Thomas J. DesRosier, Chief Legal Officer
200 Sidney Street
Cambridge, MA 02139 

email: tdesrosier@serestherapeutics.com
Telephone: 617-945-9626

with a copy to

Latham & Watkins LLP
Attention: Haim ZaltzmanPeter N. Handrinos  
505 Montgomery200 Clarendon Street
Boston, MA 02116

Suite 2000
San Francisco, CA 94111-6538

Email: haim.zaltzmanpeter.handrinos@lw.com
Telephone: 415-395-8870617-948-6060

or to such other address as each party may designate for itself by like notice.

c.

Entire Agreement; Amendments.

i.

This Agreement and the other Loan Documents constitute the entire agreement and understanding of the parties hereto in 
respect of the subject matter hereof and thereof, and supersede and replace in their entirety any prior proposals, term sheets, non-disclosure or 
confidentiality agreements, letters, negotiations or other documents or agreements, whether written or oral, with respect to the subject matter 
hereof or thereof (including Agent’s proposal letter dated September 19, 2019 and accepted by Borrower on September 25, 2019 and the Non-
Disclosure Agreement).

ii.

Neither this Agreement, any other Loan Document, nor any terms hereof or thereof may be amended, supplemented or 

modified except in accordance with the provisions of this Section 11.3(b).  The Required Lenders and Loan Parties party to the relevant Loan 
Document may, or, with the written consent of the Required Lenders, Agent and Loan Parties party to the relevant Loan Document may, from 
time to time, (i) enter into written amendments, supplements or modifications hereto and to the other Loan Documents for the purpose of adding 
any provisions to this Agreement or the other Loan Documents or 

212788652 v9 

263757953 v7

35

 
 
changing in any manner the rights of Lenders or of Loan Parties hereunder or thereunder or (ii) waive, on such terms and conditions as the 
Required Lenders or Agent, as the case may be, may specify in such instrument, any of the requirements of this Agreement or the other Loan 
Documents or any default or Event of Default and its consequences; provided, however, that no such waiver and no such amendment, 
supplement or modification shall (A) forgive the principal amount or extend the final scheduled date of maturity of any Loan, extend the 
scheduled date of any amortization payment in respect of any Term Loan Advance, reduce the stated rate of any interest or fee payable 
hereunder, or extend the scheduled date of any payment thereof, in each case without the written consent of each Lender directly affected 
thereby; (B) eliminate or reduce the voting rights of any Lender under this Section 11.3(b) without the written consent of such Lender; (C) 
reduce any percentage specified in the definition of Required Lenders, consent to the assignment or transfer by Loan Parties of any of its rights 
and obligations under this Agreement and the other Loan Documents, release all or substantially all of the Collateral or release a Loan Party from 
its obligations under the Loan Documents, in each case without the written consent of all Lenders; or (D) amend, modify or waive any provision 
of Section 11.17 without the written consent of Agent.  Any such waiver and any such amendment, supplement or modification shall apply 
equally to each Lender and shall be binding upon the applicable Loan Parties, Lenders, Agent and all future holders of the Loans.

d.

No Strict Construction.  The parties hereto have participated jointly in the negotiation and drafting of this Agreement.  In the event an 
ambiguity or question of intent or interpretation arises, this Agreement shall be construed as if drafted jointly by the parties hereto and no presumption or 
burden of proof shall arise favoring or disfavoring any party by virtue of the authorship of any provisions of this Agreement.

e.

No Waiver.  The powers conferred upon Agent and Lenders by this Agreement are solely to protect their rights hereunder and under 

the other Loan Documents and their interest in the Collateral and shall not impose any duty upon Agent or Lenders to exercise any such powers.  No 
omission or delay by Agent or Lenders at any time to enforce any right or remedy reserved to them, or to require performance of any of the terms, 
covenants or provisions hereof by Borrower at any time designated, shall be a waiver of any such right or remedy to which Agent or Lenders is entitled, nor 
shall it in any way affect the right of Agent or Lenders to enforce such provisions thereafter.

f.

Survival.  All agreements, representations and warranties contained in this Agreement and the other Loan Documents or in any 

document delivered pursuant hereto or thereto shall be for the benefit of Agent, Lenders and Borrower, as applicable, and shall survive the execution and 
delivery of this Agreement.  Sections 6.3, 11.8, 11.9, 11.10, 11.14, 11.15 and 11.17, shall survive the termination of this Agreement.

g.

Successors and Assigns.  The provisions of this Agreement and the other Loan Documents shall inure to the benefit of and be binding 

on Borrower and its permitted assigns (if any).  No Loan Party shall assign its obligations under this Agreement or any of the other Loan Documents 
without Agent’s express prior written consent, and any such attempted assignment shall be void and of no effect.  Agent and Lenders may assign, transfer, 
or endorse its rights hereunder and under the other Loan Documents without prior notice to Borrower, and all of such rights shall inure to the benefit of 
Agent’s and Lenders’ successors and assigns; provided that as long as no Event of Default has occurred and is continuing, neither Agent nor any Lenders 
may assign, transfer or endorse its rights hereunder or under the Loan Documents to any party that is a direct competitor of Borrower or a distressed debt or 
vulture fund (as reasonably determined by Agent), it being acknowledged that in all cases, any transfer to a controlled Affiliate of any Lenders or Agent 
shall be allowed.  Notwithstanding the foregoing, (x) in connection with any assignment by a Lender as a result of a forced divestiture at the request of any 
regulatory agency, the restrictions set forth herein shall not apply and Agent and Lenders may assign, transfer or indorse its rights hereunder and under the 
other Loan Documents to any Person or party and (y) in connection with a Lender’s own financing or securitization transactions, the restrictions set forth 
herein shall not apply and Agent and Lenders may assign, transfer or indorse its rights hereunder and under the other Loan Documents to any Person or 
party providing such financing or formed to undertake such securitization transaction and any transferee of such Person or party upon the occurrence of a 
default, event of default or similar occurrence with respect to such financing or securitization transaction; provided that no such sale, transfer, pledge or 
assignment under this clause (y) shall release such Lender from any of its obligations hereunder or substitute any such Person or party for such Lender as a 

212788652 v9 

263757953 v7

36

 
 
party hereto until Agent shall have received and accepted an effective assignment agreement from such Person or party in form satisfactory to Agent 
executed, delivered and fully completed by the applicable parties thereto, and shall have received such other information regarding such assignee as Agent 
reasonably shall require.  Agent, acting solely for this purpose as an agent of Borrower, shall maintain at one of its offices in the United States a register for 
the recordation of the names and addresses of Lender(s), Term Commitments of, and principal amounts (and stated interest) of the Loans owing to, each 
Lender pursuant to the terms hereof from time to time (the “Register”).  The entries in the Register shall be conclusive absent manifest error, and Borrower, 
Agent and Lender shall treat each Person whose name is recorded in the Register pursuant to the terms hereof as a Lender hereunder for all purposes of this 
Agreement.  The Register shall be available for inspection by Borrower and any Lender, at any reasonable time and from time to time upon reasonable 
prior notice.

h.

Governing Law.  This Agreement and the other Loan Documents have been negotiated and delivered to Agent and Lenders in the State 

of California, and shall have been accepted by Agent and Lenders in the State of California.  Payment to Agent and Lenders by Borrower of the Secured 
Obligations is due in the State of California.  This Agreement and the other Loan Documents shall be governed by, and construed and enforced in 
accordance with, the laws of the State of California, excluding conflict of laws principles that would cause the application of laws of any other jurisdiction.

i.

Consent to Jurisdiction and Venue.  All judicial proceedings (to the extent that the reference requirement of Section 11.10 is not 

applicable) arising in or under or related to this Agreement or any of the other Loan Documents may be brought in any state or federal court located in the 
State of California.  By execution and delivery of this Agreement, each party hereto generally and unconditionally: (a) consents to nonexclusive personal 
jurisdiction in Santa Clara County, State of California; (b) waives any objection as to jurisdiction or venue in Santa Clara County, State of California; (c) 
agrees not to assert any defense based on lack of jurisdiction or venue in the aforesaid courts; and (d) irrevocably agrees to be bound by any judgment 
rendered thereby in connection with this Agreement or the other Loan Documents.  Service of process on any party hereto in any action arising out of or 
relating to this Agreement shall be effective if given in accordance with the requirements for notice set forth in Section 11.2, and shall be deemed effective 
and received as set forth in Section 11.2.  Nothing herein shall affect the right to serve process in any other manner permitted by law or shall limit the right 
of either party to bring proceedings in the courts of any other jurisdiction.

j.

Mutual Waiver of Jury Trial / Judicial Reference.

i.

Because disputes arising in connection with complex financial transactions are most quickly and economically resolved by 
an experienced and expert Person and the parties wish applicable state and federal laws to apply (rather than arbitration rules), the parties desire 
that their disputes be resolved by a judge applying such applicable laws.  EACH OF BORROWER AGENT AND LENDERS SPECIFICALLY 
WAIVES ANY RIGHT IT MAY HAVE TO TRIAL BY JURY OF ANY CAUSE OF ACTION, CLAIM, CROSS-CLAIM, COUNTERCLAIM, 
THIRD PARTY CLAIM OR ANY OTHER CLAIM (COLLECTIVELY, “CLAIMS”) ASSERTED BY BORROWER AGAINST AGENT, 
LENDERS OR THEIR RESPECTIVE ASSIGNEE OR BY AGENT, LENDERS OR THEIR RESPECTIVE ASSIGNEE AGAINST 
BORROWER.  This waiver extends to all such Claims, including Claims that involve Persons other than Agent, Borrower or any Lenders; 
Claims that arise out of or are in any way connected to the relationship among Borrower, Agent and Lenders; and any Claims for damages, 
breach of contract, tort, specific performance, or any equitable or legal relief of any kind, arising out of this Agreement, any other Loan 
Document.

ii.

If the waiver of jury trial set forth in Section 11.10(a) is ineffective or unenforceable, the parties agree that all Claims shall 
be resolved by reference to a private judge sitting without a jury, pursuant to Code of Civil Procedure Section 638, before a mutually acceptable 
referee or, if the parties cannot agree, a referee selected by the Presiding Judge of the Santa Clara County, California.  Such proceeding shall be 
conducted in Santa Clara County, California, with California rules of evidence and discovery applicable to such proceeding.

212788652 v9 

263757953 v7

37

 
 
iii.

In the event Claims are to be resolved by judicial reference, either party may seek from a court identified in Section 11.9, 
any prejudgment order, writ or other relief and have such prejudgment order, writ or other relief enforced to the fullest extent permitted by law 
notwithstanding that all Claims are otherwise subject to resolution by judicial reference.

k.

Professional Fees.  Borrower promises to pay Agent’s and Lenders’ reasonable fees and expenses necessary to finalize the loan 

documentation, including but not limited to reasonable attorneys’ fees, UCC searches, filing costs, and other miscellaneous expenses, provided that the Due 
Diligence Fee shall be applied in its entirety to the Lenders’ non-legal transaction costs and due diligence expenses.  In addition, Borrower promises to pay 
any and all reasonable attorneys’ and other professionals’ fees and expenses incurred by Agent and Lenders after the Closing Date in connection with or 
related to:  (a) the Loan; (b) the administration, collection, or enforcement of the Loan; (c) the amendment or modification of the Loan Documents; (d) any 
waiver, consent, release, or termination under the Loan Documents; (e) the protection, preservation, audit, field exam, sale, lease, liquidation, or disposition 
of Collateral or the exercise of remedies with respect to the Collateral; (f) any legal, litigation, administrative, arbitration, or out of court proceeding in 
connection with or related to Borrower or the Collateral, and any appeal or review thereof; and (g) any bankruptcy, restructuring, reorganization, 
assignment for the benefit of creditors, workout, foreclosure, or other action related to Borrower, the Collateral, the Loan Documents, including 
representing Agent or Lenders in any adversary proceeding or contested matter commenced or continued by or on behalf of Borrower’s estate, and any 
appeal or review thereof.

l.

Confidentiality.  Agent and Lenders acknowledge that certain items of Collateral and information provided to Agent and Lenders by 

Borrower are confidential and proprietary information of Borrower, if and to the extent such information either (i) is marked as confidential by Borrower at 
the time of disclosure, or (ii) should reasonably be understood to be confidential (the “Confidential Information”).  Accordingly, Agent and Lenders agree 
that any Confidential Information it may obtain in the course of acquiring, administering, or perfecting Agent’s security interest in the Collateral shall not 
be disclosed to any other Person or entity in any manner whatsoever, in whole or in part, without the prior written consent of Borrower, except that Agent 
and Lenders may disclose any such information:  (a) to its Affiliates and its partners, investors, lenders, directors, officers, employees, agents, advisors, 
accountants, counsel, representative and other professional advisors if Agent or Lenders in their reasonable discretion determines that any such party should 
have access to such information in connection with such party’s responsibilities in connection with the Loan or this Agreement and, provided that such 
recipient of such Confidential Information either (i) agrees to be bound by the confidentiality provisions of this paragraph or (ii) is otherwise subject to 
confidentiality restrictions that reasonably protect against the disclosure of Confidential Information pursuant to similar terms; (b) if such information is 
generally available to the public or to the extent such information becomes publicly available other than as a result of a breach of this Section or becomes 
available to Agent or any Lender, or any of their respective Affiliates on a non-confidential basis from a source other than Borrower and not in violation of 
any confidentiality obligations known to the Agent or such Lender; (c) if required or appropriate in any report, statement or testimony submitted to any 
governmental authority having or claiming to have jurisdiction over Agent or Lenders and any rating agency; (d) if required or appropriate in response to 
any summons or subpoena or in connection with any litigation, to the extent permitted or deemed advisable by Agent’s or Lenders’ counsel; (e) to comply 
with any legal requirement or law applicable to Agent or Lenders or demanded by any governmental authority; (f) to the extent reasonably necessary in 
connection with the exercise of, or preparing to exercise, or the enforcement of, or preparing to enforce, any right or remedy under any Loan Document, 
including Agent’s sale, lease, or other disposition of Collateral after default, or any action or proceeding relating to any Loan Document; (g) to any 
participant or assignee of Agent or Lenders or any prospective participant or assignee; provided, that such participant or assignee or prospective participant 
or assignee is subject to confidentiality restrictions no less protective than the provisions of this Section 11.12; (h) otherwise to the extent consisting of 
general portfolio information that does not identify Borrower; or (i) otherwise with the prior consent of Borrower; provided, that any disclosure made in 
violation of this Agreement shall not affect the obligations of Borrower or any of its Affiliates or any guarantor under this Agreement or the other Loan 
Documents.  Agent’s and Lenders’ obligations under this Section 11.12 shall supersede all of their respective obligations under the Non-Disclosure 
Agreement.

212788652 v9 

263757953 v7

38

 
 
m.

Assignment of Rights.  Borrower acknowledges and understands that Agent or Lenders may, subject to Section 11.7, sell and assign all 

or part of its interest hereunder and under the Loan Documents to any Person or entity (an “Assignee”).  After such assignment the term “Agent” or 
“Lender” as used in the Loan Documents shall mean and include such Assignee, and such Assignee shall be vested with all rights, powers and remedies of 
Agent and Lenders hereunder with respect to the interest so assigned; but with respect to any such interest not so transferred, Agent and Lenders shall retain 
all rights, powers and remedies hereby given.  No such assignment by Agent or Lenders shall relieve Borrower of any of its obligations hereunder.  Lenders 
agree that in the event of any transfer by it of any promissory notes, it shall endorse thereon a notation as to the portion of the principal of such promissory 
notes, which shall have been paid at the time of such transfer and as to the date to which interest shall have been last paid thereon.

n.

Revival of Secured Obligations; Termination.  Other than as set forth in Section 11.6, his Agreement and the other Loan Documents 

shall terminate on the payment in full in cash of the Secured Obligations (other than any obligations that specifically survive termination).  Notwithstanding 
the preceding sentence, this Agreement and the Loan Documents shall remain in full force and effect and continue to be effective if any petition is filed by 
or against Borrower for liquidation or reorganization, if Borrower becomes insolvent or makes an assignment for the benefit of creditors, if a receiver or 
trustee is appointed for all or any significant part of Borrower’s assets, or if any payment or transfer of Collateral is recovered from Agent or Lenders.  The 
Loan Documents and the Secured Obligations and Collateral security shall continue to be effective, or shall be revived or reinstated, as the case may be, if 
at any time payment and performance of the Secured Obligations or any transfer of Collateral to Agent, or any part thereof is rescinded, avoided or 
avoidable, reduced in amount, or must otherwise be restored or returned by, or is recovered from, Agent, Lenders or by any obligee of the Secured 
Obligations (other than obligations that survive termination), whether as a “voidable preference,” “fraudulent conveyance,” or otherwise, all as though such 
payment, performance, or transfer of Collateral had not been made.  In the event that any payment, or any part thereof, is rescinded, reduced, avoided, 
avoidable, restored, returned, or recovered, the Loan Documents and the Secured Obligations shall be deemed, without any further action or 
documentation, to have been revived and reinstated except to the extent of the full and final payment to Agent or Lenders in cash.  

o.

Counterparts.  This Agreement and any amendments, waivers, consents or supplements hereto may be executed in any number of 

counterparts, and by different parties hereto in separate counterparts, each of which when so delivered shall be deemed an original, but all of which 
counterparts shall constitute but one and the same instrument.

p.

No Third Party Beneficiaries.  No provisions of the Loan Documents are intended, nor will be interpreted, to provide or create any 

third-party beneficiary rights or any other rights of any kind in any Person other than Agent, Lenders and Borrower unless specifically provided otherwise 
herein, and, except as otherwise so provided, all provisions of the Loan Documents shall be personal and solely among Agent, Lenders and the Loan 
Parties which are a party thereto.

q.

Agency.  Agent and each Lender hereby agree to the terms and conditions set forth on Addendum 3 attached hereto.  Borrower 

acknowledges and agrees to the terms and conditions set forth on Addendum 3 attached hereto. 

r.

Publicity.  None of the parties hereto nor any of its respective member businesses and Affiliates shall, without the other parties’ prior 

written consent (which shall not be unreasonably withheld or delayed), publicize or use (a) the other party’s name (including a brief description of the 
relationship among the parties hereto), logo or hyperlink to such other parties’ web site, separately or together, in written and oral presentations, 
advertising, promotional and marketing materials, client lists, public relations materials or on its web site (together, the “Publicity Materials”); (b) the 
names of officers of such other parties in the Publicity Materials; and (c) such other parties’ name, trademarks, servicemarks in any news or press release 
concerning such party; provided however, notwithstanding anything to the contrary herein, no such consent shall be required (i) to the extent necessary to 
comply with the requests of any regulators, legal requirements or laws applicable to such party, pursuant to any listing agreement with any national 
securities exchange (so long as such party provides prior notice to the other party hereto to the extent reasonably practicable) and (ii) to comply with 
Section 11.12.

212788652 v9 

263757953 v7

39

 
 
s.

Multiple Borrowers.  If another party is joined as a Borrower hereunder after the Closing Date, each Borrower hereby agrees to the 

terms and conditions set forth on Addendum 4 attached hereto. 

[REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

212788652 v9 

263757953 v7

40

 
 
 
 
 
IN WITNESS WHEREOF, Borrower, Agent and Lenders have duly executed and delivered this Loan and Security Agreement as of the date set 

forth above.

[SIGNATURE PAGE TO LOAN AND SECURITY AGREEMENT]

BORROWER:

SERES THERAPEUTICS, INC.

Signature: 

_______________________

Print Name:  _______________________

Title: 

_______________________

212788652 v9 

263757953 v7

 
 
 
 
 
Accepted in Palo Alto, California:

[SIGNATURE PAGE TO LOAN AND SECURITY AGREEMENT]

AGENT:

HERCULES CAPITAL, INC.

Signature: 

_______________________

Print Name:  _______________________

Title: 

_______________________

LENDERS:

HERCULES CAPITAL, INC.

Signature: 

_______________________

Print Name:  _______________________

Title: 

_______________________

212788652 v9 

263757953 v7

2

 
 
 
 
 
Table of Addenda, Exhibits and Schedules

Addendum 1:   

Taxes; Increased Costs

Addendum 2:  SBA Provisions

Addendum 3:  Agent and Lender Terms

Addendum 4:  Multiple Borrower Terms

Exhibit A: 

Advance Request 

Attachment to Advance Request

Exhibit B: 

Name, Locations, and Other Information 

Exhibit C: 

Patents, Trademarks, Copyrights and Licenses

Exhibit D: 

Deposit Accounts and Investment Accounts

Exhibit E: 

Compliance Certificate

Exhibit F: 

Joinder Agreement

Exhibit G:   ACH Debit Authorization Agreement

Exhibit H--1:  Form of U.S. Tax Compliance Certificate (For Foreign Lenders That Are Not Partnerships For U.S. Federal Income Tax Purposes)

Exhibit H--2:  Form of U.S. Tax Compliance Certificate (For Foreign Participants That Are Not Partnerships For U.S. Federal Income Tax Purposes)

Exhibit H--3:  Form of U.S. Tax Compliance Certificate (For Foreign Participants That Are Partnerships For U.S. Federal Income Tax Purposes)

Exhibit H--4:  Form of U.S. Tax Compliance Certificate (For Foreign Lenders That Are Partnerships For U.S. Federal Income Tax Purposes)

Schedule 1.1  Commitments
Schedule 1A  Existing Indebtedness
Schedule 1B  Existing Investments
Schedule 1C  Existing Liens
Schedule 5.8  Tax Matters
Schedule 5.11  Product / Intellectual Property Litigation or Proceedings
Schedule 5.14 Subsidiaries

 
 
 
 
 
 
Exhibit 10.25

[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

LONG TERM MANUFACTURING AGREEMENT

EXECUTION VERSION

THIS LONG TERM MANUFACTURING AGREEMENT (the “Agreement”), effective as of November 8, 2021 (the “Effective Date”), 
is  made  and  entered  into  by  and  between  Seres  Therapeutics,  Inc.  (“Seres”),  a  corporation  organized  and  existing  under  the  laws  of 
Delaware,  having  its  principal  place  of  business  at  200  Sidney  Street,  Cambridge,  MA  02139,  USA;  and  BacThera  AG,  a  joint  venture 
between Chr. Hansen A/S and Capsugel Belgium NV, a Lonza Group Affiliate, (“Lonza”), having a place of business at Hochbergerstrasse 
60A, 4057 Basel, Switzerland (“Bacthera”).  Seres and Bacthera may be referred to herein individually as a “Party” or collectively as the 
“Parties.”

WHEREAS, Bacthera and its Affiliates are in the business of evaluation, development and manufacture of live biotherapeutic products; and

WHEREAS,  Seres  desires  to  have  its  products  SER-109  and,  if  agreed  by  the  Parties,  SER-287  (each  a  “Product”  and  collectively,  the 
“Products”) Manufactured by one or more entities, including Bacthera, for commercial supply.  All Manufacturing to be provided in relation 
to  the  Product  or  work  to  be  performed  under  this  Agreement  may  be  performed  by  Bacthera,  or,  subject  to  Section  11  herein,  (i)  by  an 
Affiliate of Bacthera or (ii) by a third party contractor acting on Bacthera’s behalf.

WHEREAS,  Bacthera  and  its  Affiliates  intend  to  finance  and  construct  a  Microbiome  Center  of  Excellence  (the  “CoE”)  in  Visp, 
Switzerland, and, subject to the terms and conditions herein, have agreed to establish a dedicated full-scale production suite for Seres within 
the  CoE  as  further  defined  in  Exhibit  1  and  its  Attachments,  such  production  suite  to  be  dedicated  to  the  Manufacture  of  the  Products 
(hereinafter, the “Facility”); and

WHEREAS, on May 17, 2021, the Parties entered into that certain Letter Agreement, which was amended on August 16, 2021 and October  
22, 2021 (“LOI”) pursuant to which Bacthera was to perform certain services in connection with the design and construction of the CoE and 
the Facility during the negotiation of this Agreement (the “LOI Services”) and Seres paid Bacthera a [***] (the “Deposit”). 

WHEREAS, Bacthera has agreed to Manufacture the Product(s) at the CoE in the Facility in accordance with this Agreement;

NOW,  THEREFORE,  in  consideration  of  the  mutual  covenants  and  obligations  set  forth  herein,  and  for  other  good  and  valuable 
consideration, the receipt and sufficiency of which is hereby acknowledged, the Parties agree as follows:

1.

DEFINITIONS

As used in the Agreement, the following terms are defined as indicated:

1.1

“Affiliate” means with respect to either Party, any business entity controlling, controlled by, or under common control with such 
Party.  For the purpose of this definition only, “control” means (a) the possession, directly or indirectly, of the power to direct the 
management or policies of a business entity, whether through the ownership of voting securities, by contract or otherwise, or (b) the 
ownership, directly or indirectly, of at least fifty percent (50%) of the voting securities or 

1

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

1.10

1.11

1.12

other ownership interest of a business entity; provided that, if local law requires a minimum percentage of local ownership, control 
will  be  established  by  direct  or  indirect  beneficial  ownership  of  one  hundred  per  cent  (100%)  of  the  maximum  ownership 
percentage that may, under such local law, be owned by foreign interests. 

“Applicable Law” shall mean all international, national, federal, state, provincial and local laws, statutes, codes, guidelines, rules, 
regulations,  ordinances,  orders,  decrees  or  other  pronouncements  of  any  governmental,  administrative  or  judicial  authority  or 
applicable engineering, construction, safety, or electrical code, whether or not contained in any applicable permit or approval, that 
apply to either of the Parties’ respective obligations hereunder, including cGMP and/or the Design and Construction Work. 

“Approved Specifications” mean the Initial Design Document, as may be adjusted by a Change Order issued pursuant to Exhibit 1.

“Bacthera Intellectual Property” means Bacthera Background Intellectual Property and New Bacthera Intellectual Property.

“Batch” means either a Scale A Batch or Scale B Batch. 

“Bacthera Personnel” mean employees of Bacthera or one of its Affiliates or one of their respective contractors who are assigned 
to perform Bacthera’s obligations under this Agreement.

“Bacthera  Competitor”  means  an  entity  primarily  engaged  in  the  Manufacture  of  drug  products  and  drug  substances  for  third 
parties.

“Business Day” means Monday through Friday, excluding public holidays observed by Bacthera in Switzerland.

“CapEx Target” has the meaning set forth in Exhibit 1.

“Certificate  of  Analysis”  means  a  document  prepared  by  Bacthera  listing  tests  performed  by  Bacthera  or  approved  external 
laboratories on representative Batch sample(s), setting forth the Product Specifications, test methods used, actual results, date and 
signature of authorised personnel, and other technical information deemed necessary for its proper use, and, if external laboratories 
have performed any such tests, the name and address of such external laboratories.

“Certificate of Compliance” means a document signed by the responsible person or its delegates of Bacthera in connection with 
the Manufacture of a Batch of Product that evidences such Batch’s compliance with cGMPs, the applicable Product Specifications, 
and Master Batch Record. 

 “Change of Control” means the occurrence of any one of the following: (a) any person (as the term is used in Sections 13(d) and 
14(d) of the Securities Exchange Act of 1934, as amended (the Exchange Act)) is or becomes the beneficial owner (as defined in 
Rule  13d-3  under  the  Exchange  Act),  directly  or  indirectly,  of  voting  securities  of  Seres  representing  more  than  50%  of  Seres’ 
outstanding voting securities or rights to acquire such securities; (b) any sale, lease, exchange or other transfer (in one transaction or 
a series of transactions) of all or substantially all of the assets 

2

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

1.13

1.14

1.15

1.16

1.17

1.18

1.19

1.20

of Seres; or (c) a plan of liquidation of Seres or an agreement for the sale or liquidation of Seres is approved and completed.

“Charges” mean the amounts to be paid by Seres pursuant to Exhibit 4.

“Commencement Date” means [***], or other date as may be agreed by the Parties pursuant to a Change Order under Exhibit 1.

“Commercially Reasonable Efforts” mean taking such steps and performing in such a manner as a well-managed company would 
undertake where such company was acting in a determined, prudent, and reasonable manner to achieve the particular result provided 
that such steps are within the reasonable control of the Party required to exert such efforts.

 “Confidential Disclosure Agreement” means that certain Mutual Confidential Disclosure Agreement, dated as of September 3, 
2020 and as amended on September 9, 2021, by and between the Parties.

“Consumables” mean the consumable products and packaging supplies and components, required by Bacthera to Manufacture a 
Product as set forth in the applicable Master Batch Record.

“Controlled”  means,  with  respect  to  an  item  or  an  intellectual  property  right,  possession  of  the  ability,  whether  arising  by 
ownership or license, to grant a license or sublicense as provided for in this Agreement under such item or right without violating 
the terms of any written agreement with any third party. 

“CQV Completion” has the meaning given in Exhibit 1.

“Current Good Manufacturing Practices” or “cGMP” means those laws and regulations applicable in the U.S., European Union 
and  Switzerland,  relating  to  the  manufacture  of  medicinal  products  for  human  use,  including,  without  limitation,  current  good 
manufacturing  practices  as  specified  in  the  ICH  guidelines,  including  without  limitation,  ICH  Q7  “ICH  Good  Manufacturing 
Practice  Guide  for  Active  Pharmaceutical  Ingredients”,  US  Federal  Food  Drug  and  Cosmetic  Act  at  21CFR  (Chapters  210,  211, 
600, 610 and 820) and Commission Directive 2003/94/EC of 8 October 2003, laying down the principles and guidelines of good 
manufacturing  practice  in  respect  of  medicinal  products  for  human  use  and  investigational  medicinal  products  for  human  use, 
Commission  Delegated  Regulation  (EU)  No  1252/2014  of  28  May  2014  supplementing  Directive  2001/83/EC  of  the  European 
Parliament  and  of  the  Council  with  regard  to  principles  and  guidelines  of  good  manufacturing  practice  for  active  substances  for 
medicinal  products  for  human  use,  the  EU  Guidelines  to  Good  Manufacturing  Practice  for  Medicinal  Products  and  the  Swiss 
Federal  Act  on  Medicinal  Products  and  Medical  Devices  812.21.    For  the  avoidance  of  doubt,  Bacthera’s  operational  quality 
standards are defined in internal cGMP policy documents.

1.21

“Design  and  Construction Work”  means  all  tangible  and  intangible  goods  and  services  to  be  provided,  and  all  acts  or  actions 
required  under  this  Agreement  (including  under  Exhibit  1)  or  reasonably  necessary,  for  the  design,  engineering,  supply  and 
procurement, manufacturing, packing and transportation, construction, commissioning, start-up, testing, guaranteeing the 

3

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

1.22

1.23

1.24

1.25

1.26

1.27

1.28

1.29

1.30

1.31

performance of the Facility, and other acts required under this Agreement or reasonably necessary to deliver with a fully-operational 
Facility, until Final Acceptance of the Facility. 

“Facility Materials” means the equipment, machinery and materials required for the Design and Construction Work according to 
Exhibit 1.  The term “Facility Materials” shall include equipment, machinery, tools, consumables, supplies and systems, purchased, 
owned, rented, or leased by Bacthera, its Affiliates or third parties for use in accomplishing the Design and Construction Work, but 
not intended for incorporation into the Facility.

 “FDA” means the United States Food and Drug Administration or any successor entity thereto.

“FD&C Act” means the United States Federal Food, Drug and Cosmetic Act, as may be amended from time to time.

“Forecast” means the requests for an estimated number of binding and non-binding Scale A and Scale B Batches for the next [***] 
months for each Product by Seres.

“Governmental Authority” means  any  supranational,  national,  regional,  state  or  local  government,  court,  governmental  agency, 
authority, board, bureau, instrumentality, or regulatory body. 

“Initial Design Document” means Attachment A to Exhibit 1.

“Intellectual Property” means ideas, concepts, discoveries, inventions, patents, copyrights, trademarks, trade names and domain 
names, rights in designs, rights in computer software, database rights developments, rights in confidential information (including 
know-how), trade secrets, techniques, methodologies, modifications, innovations, improvements, writings, documentation, data and 
rights (whether or not protectable under state, federal or foreign patent, trademark, copyright or similar laws) or the like, whether or 
not written or otherwise fixed in any form or medium, regardless of the media on which contained and whether or not patentable or 
copyrightable and whether registered or unregistered.  The foregoing includes all applications (or rights to apply) for, and renewals 
or  extensions  of,  any  of  the  rights  described  in  the  foregoing  clause  (where  applicable)  and  all  rights  and  applications  that  are 
similar or equivalent to the rights and application described in the foregoing clauses, which exist now, or which come to exist in the 
future, in any part of the world.

“Interest Rate” means [***]% per year.

“Licensed  Know-How”  means  any  and  all  technology,  information,  expertise,  know-how,  and/or  trade  secrets  Controlled  by 
Bacthera  that  is  necessary  or  useful  for  the  Manufacture  of  the  Products  and/or  the  Manufacture,  use,  sale,  offer  for  sale,  and 
importation of the Products. 

“Manufacture,”  “Manufacturing,”  and  “Manufactured”  mean  all  activities  involved  in  the  manufacture  and  production  of  a 
Product,  including,  without  limitation,  Materials  sourcing,  storage,  handling  and  testing;  packaging  (primary  and  secondary); 
preparation; formulation; processing; production; filling; component assembly; finishing; analysis; labelling; warehousing; quality 
control testing (including in-process, release and stability testing, when applicable); 

4

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

Release; storage; making Product available for delivery; and the handling, storage and disposal of any residues or wastes generated 
thereby.

“Marketing  Approval”  means  all  approvals,  licenses,  registrations,  authorizations  or  clearances  of  any  Regulatory  Authority 
necessary for the commercialization, distribution, marketing, offer for sale, use, importation into, storage, and sale in the territory of 
the Product at either Scale Manufactured by Bacthera at the Facility.

“Master Batch Record” or “MBR” means, with respect to each Product to be Manufactured hereunder, a formal set of instructions 
given  by  Seres  for  the  Manufacture  of  each  such  Product  and  shall  include,  without  limitation,  the  applicable  Material 
Specifications,  other  procedures,  directions  and  controls  associated  with  the  Manufacture  and  testing  of  the  Product  and  Product 
Specifications.  The MBR shall be developed and maintained in Bacthera’s standard format by Bacthera, as per Seres’ instructions 
and agreement, and using master formulation and technical support. 

“Material Loss” means the cost of the SRM, Exhibit 7 Materials, or Products (including Products in any state of Manufacture) lost 
during the performance of Bacthera’s obligations hereunder to the extent caused by (a) [***] of or any Bacthera Personnel or (b) 
breach by Bacthera of any material term of this Agreement or the Quality Agreement.

“Materials” as used in this Agreement collectively means all materials required for Manufacture of Product, including the SRM, 
Consumables, and Raw Materials, including any in-process materials, processing aids, substances, intermediates, components, and 
ingredients (active and inactive) and primary packaging supplies

“Material Specifications” means the specifications for Materials, including, but not limited to, written release specifications and 
testing instructions, as specified in the Master Batch Record or as otherwise mutually agreed upon in writing by the Parties.

“Operating  Documents”  mean  the  corporate  standards,  standard  operating  procedures,  standard  manufacturing  procedures, 
Bacthera  customized  manufacturing  procedures  developed  prior  to  the  Effective  Date  or  outside  the  scope  of  this  Agreement, 
electronic  programs  and  files,  protocols,  validation  documentation,  and  supporting  documentation  used  by  Bacthera,  that  a  third 
party manufacturer or any facility operated by Seres would reasonably be expected to have, excluding any of the foregoing that (i) 
are  unique  to  the  Manufacture  of  the  Product(s);  (ii)  are  otherwise  reasonably  required  for  a  reasonably  skilled  manufacturer  to 
seamlessly assume responsibility for Manufacture of the Products or (iii) relate to environmental monitoring of the Facility. 

“Person”  means  any  individual,  corporation,  partnership,  limited  liability  company,  firm,  joint  venture,  association,  joint-stock 
company, trust, unincorporated organization, Regulatory Authority or other entity.

 “Product Specifications” means the specifications for a Product, including the [***]. The Product Specifications for SER-109 as 
of the Effective Date are set forth in Exhibit 2.  If Seres elects to add 

1.32

1.33

1.34

1.35

1.36

1.37

1.38

1.39

5

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

1.40

1.41

1.42

1.43

1.44

1.45

1.46

1.47

SER-287 as a Product to this Agreement, Exhibit 2 shall be updated to include the specifications for SER-287.

“Prudent Industry Practice” means the codes and standards specified in this Agreement (including Exhibit 1) and the Approved 
Specifications, except to the extent such codes and standards do not address or are not otherwise applicable to the circumstances at 
issue, then Prudent Industry Practice shall mean those sound and prudent practices, methods, specifications or standards of design, 
engineering,  construction,  performance,  safety,  workmanship,  equipment  and  components  prudently  and  generally  engaged  in  or 
observed  by  the  majority  of  the  professional  engineering,  equipment  supply  and  construction  contractors  in  the  pharmaceutical 
industries for similar types of facilities as of the Effective Date, in the exercise of reasonable judgment, skill, diligence and care that 
would  have  been  expected  from  experienced  and  qualified  contractors,  engineers,  equipment  manufacturers,  or  operators  to 
accomplish  the  desired  result  in  a  manner  consistent  with  Applicable  Law,  reliability,  safety,  environmental  protection  and  local 
conditions. 

“Purchase Order” means written orders from Seres to Bacthera which shall specify (a) the number of Batches of Product ordered, 
(b) the Product ordered, (c) shipping instructions (e.g. choice of container, temperature requirements), (d) requested Delivery Dates, 
and (e) delivery destinations.

“Quality Agreement” means the quality agreement, setting out the responsibilities of the Parties in relation to quality as required 
for compliance with cGMP.

“Raw Materials” means all excipients, inactive ingredients and other substances used by Bacthera in the Manufacture of a Product, 
with the exception of SRM and Consumables, as specified in the applicable Master Batch Record.

“Regulatory  Authority”  means  FDA,  EMA,  Swissmedic  or  other  governmental  or  regulatory  body,  agency  authority  or  entity 
which  regulates,  directs  or  controls  the  Manufacture,  testing,  commercialization  or  use  of  the  Product  in  the  country  where  the 
Product is Manufactured or sold. 

“Regulatory Filings” means the governmental filings required to obtain authorizations for or approval to conduct clinical trials or 
to market and sell a Product in a given country where the Product is Manufactured or sold, including, but not limited to, Product 
registrations  and  Marketing  Approvals,  as  applicable,  in  each  such  country,  and  any  other  notice,  submission  or  filing  to  a 
Regulatory Authority.

“Release”  means,  with  respect  to  a  Batch,  the  date  on  which  Bacthera  has  provided  to  Seres  the  Certificate  of  Analysis  and 
Certificate of Compliance.

“Scale A Batch” means a specific quantity of Product that (a) is intended to have uniform character and quality within specified 
limits, and (b) is Manufactured according to a single manufacturing order during the same cycle of manufacture as further specified 
in  the  Quality  Agreement  and  applicable  Master  Batch  Record,  and  (c)  requires  [***]  and  including  [***].    The  [***]  limit  of 
required SRM for a Scale A Batch shall be confirmed through process validation.

6

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

1.48

1.49

1.50

1.51

1.52

1.53

“Scale B Batch” means a specific quantity of Product that (a) is intended to have uniform character and quality within specified 
limits, and (b) is Manufactured according to a single manufacturing order during the same cycle of manufacture as further specified 
in the Quality Agreement and applicable Master Batch Record, and (c) requires [***] than [***].  The [***] limit of required SRM 
for a Scale B Batch shall be confirmed through process validation.

“Seres Supplied Materials” means the SRM.

“SOP” means Bacthera’s standard operating procedures applicable to the Manufacture of the Product. 

“SRM” means the active pharmaceutical or biological ingredient as further set forth in Exhibit 3 provided by Seres. 

“Swissmedic” means the national authorisation and supervisory authority for drugs and medical products.

“Termination Assistance Period”  means  the  period  specified  by  Seres,  which  shall  not  exceed  [***]  days  total  (of  which  [***] 
days may extend the Term) unless otherwise approved by the JSC.

1.54

“Theoretical Capacity” means the design capacity of the Facility for the Manufacture of Product.

2.

FACILITY DESIGN AND CONSTRUCTION

The Parties’ rights and obligations with respect to the Design and Construction Work are set forth in Exhibit 1.  The Facility shall meet the 
requirements of the Approved Specifications and Sections 2 and 4 of Exhibit 1.

3.

3.1

PROGRAM GOVERNANCE

The Parties shall form a joint development team (the “JSC”), made up of an equal number of representatives of Seres and Bacthera 
(not to exceed three (3) each), each of whom shall have sufficient decision-making authority, which shall have responsibility for 
planning,  coordinating  and  directing  all  activities  under,  and  pursuant  to,  this  Agreement.    In  particular,  the  JSC  shall  provide 
program  oversight  and  facilitate  and  review  the  Design  and  Construction  Work  (including  amendments  to  the  Approved 
Specifications or any changes to CapEx Target for the Facility), Manufacturing operations hereunder and key personnel changes.  
For the avoidance of doubt, Bacthera shall not depend on the decisions of the JSC and Seres for the construction of the CoE.  In 
addition to the JSC members, each Party shall designate a project manager who will sit on the JSC and who shall be responsible for 
ensuring clear and responsive communication between the Parties and the effective exchange of information, serving as the primary 
point of contact for any issues arising under this Agreement, implementing and coordinating activities, and facilitating the exchange 
of information between the Parties, with respect to the Facility and Manufacturing operations hereunder.

3.2

Each of the Parties shall cause their representatives who are members of the JSC to fulfil all of the obligations of the JSC under this 
Agreement, and to act in accordance with the requirements of 

7

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

3.3

3.4

3.5

3.6

3.7

3.8

4.

4.1

this Agreement.  The representatives for either Party on the JSC may be changed at any time upon written notice to the other Party. 

Until  completion  of  the  Design  and  Construction  Work  in  accordance  with  Exhibit 1,  the  JSC  shall  meet  no  less  than  once  per 
calendar month (and more often as is reasonably considered necessary at the request of any Party with reasonable notice) to provide 
an update on progress of the Design and Construction Work, carry out the JSC’s responsibilities under this Agreement and to make 
decisions  regarding  progress  against  the  timelines  set  out  in  Exhibit  1  and  the  allocation  of  resources  for  the  Design  and 
Construction Work and any modifications to the CapEx targets. 

From the Commencement Date until the second anniversary thereof, the JSC shall meet no less than once per quarter (and more 
often as is reasonably considered necessary at the request of any Party with reasonable notice).  Thereafter, the JSC shall meet twice 
per year (and more often as is reasonably considered necessary at the request of any Party with reasonable notice).

Either Party may call a meeting of the JSC upon no less than [***] days’ notice to all other members of the JSC unless otherwise 
agreed by the JSC.

Meetings of the JSC may be held as a face-to-face meeting, teleconference or video conference, provided that all representatives 
participating in such meeting can communicate with each other simultaneously and instantaneously.  The JSC shall hold one face-
to-face meeting as agreed by JSC members per year (or other frequency agreed by the JSC).  The presence of at least one member 
of the JSC from each Party shall be required for a quorum, and each Party may have a reasonable number of non-voting participants 
at such meetings, who shall be subject to confidentiality provisions at least as restrictive as those referred to in Section  14 of this 
Agreement.

The JSC will [***], with each Party’s members [***].  When [***] on any matter, [***].

All decisions made by the JSC shall be reflected in the minutes taken at each meeting of the JSC.  The responsibility for preparing 
and delivering such minutes shall alternate between the Parties.  Such minutes shall be communicated to each of the members of the 
JSC by means of facsimile or electronic mail.  Any objection by a member of the JSC to the contents of the minutes of any meeting 
of the JSC must be by communication to the other members of the JSC within [***] business days following the communication of 
those minutes to the members. 

BACTHERA PERSONNEL

Bacthera shall use Commercially Reasonable Efforts to ensure that the individuals identified as “Key Personnel” in Exhibit 5  and 
FTEs specified are available to Manufacture each Batch of Product ordered by Seres hereunder. 

(a)

Before  assigning  an  individual  to  be  one  of  the  Key  Personnel,  Bacthera  will  notify  Seres  of  the  proposed  assignment, 
introduce the individual to appropriate Seres representatives and provide Seres with a résumé and other information about 
the  individual  reasonably  requested  by  Seres.    If  Seres  in  good  faith  objects  to  the  proposed  assignment,  Bacthera  will 
propose  alternatives  within  a  time  period  as  to  not  leave  a  role  vacant  for  more  than  [***]  days  or  than  otherwise 
reasonably agreed by both Parties. 

8

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

(b)

(c)

Other than in the case of a resignation without notice, departures due to incapacity or death, or termination for cause under 
circumstances in which termination without notice is appropriate, Bacthera may not remove an individual assigned to be 
one  of  the  Key  Personnel  until  Seres  has  approved  a  suitable  replacement  (which  approval  shall  not  be  unreasonably 
withheld, conditioned or delayed) and such replacement has been properly trained and made familiar with the Manufacture 
of the Products. 

The Project Manager (as defined in Exhibit 1) assigned to work for Seres under this Agreement and the Direct FTEs in the 
Facility may [***] that [***] during [***].  [***]. 

Bacthera shall employ or engage a sufficient number of qualified and adequately trained Bacthera Personnel to ensure that Bacthera 
is  able  to  meet  its  obligations  under  this  Agreement,  including  Manufacture  and  delivery  of  Products  in  accordance  with  this 
Agreement (including delivery of the Products on or before the Delivery Date specified in the applicable Purchase Order). 

Bacthera  shall  use  Commercially  Reasonable  Efforts  to  guarantee  that  any  absences  due  to  illness  and  vacation  of  the  trained 
Bacthera  Personnel  will  not  affect  the  compliance  of  its  obligations,  up  to  and  including  retaining  appropriately  experienced  and 
trained staff for overtime work at its own expense. 

The  initial  staffing  plan  for  the  Facility  is  set  forth  on  Exhibit  6.    The  personnel  filling  the  roles  set  forth  therein  (the  “Direct 
FTEs”)  [***].    Bacthera  will  cause  each  of  the  Direct  FTEs  to  devote  substantially  full  time  and  effort  to  the  Manufacture  of 
Products unless otherwise approved by Seres. 

The Bacthera Personnel assigned to perform Bacthera’s obligations will be qualified and adequately trained.  Bacthera will promptly 
remove  an  individual  from  Manufacturing  under  this  Agreement  upon  Seres’  reasonable  request  if  removal  is  in  the  interest  of 
Manufacture. The Parties will immediately convene a meeting of the JSC to discuss the matter and vote on whether removal was 
reasonable and its impact on the production schedule.  If either Party disputes the vote, resolution will follow the escalation pathway 
in Section 17. 

As between Bacthera and Seres, Bacthera Personnel will be and remain employees, contractors, consultants or agents of Bacthera 
and/or its Affiliates, and Bacthera and/or its Affiliates will be solely responsible for the payment of compensation for the employees 
of  Bacthera  and/or  its  Affiliates  (including  applicable  workers’  compensation  insurance,  social  security  contributions,  and  other 
similar  statutory  and  fringe  benefits).    Bacthera  covenants  and  agrees  that  Bacthera  and/or  its  Affiliates  will  maintain  workers’ 
compensation benefits and employers’ liability insurance as required by Applicable Laws with respect to all employees of Bacthera 
and/or its Affiliates working at the CoE. 

FACILITY

Person in Plant.  Seres shall be permitted to have, at no additional cost, [***] based at the Facility (the “Observer”) for the purpose 
of  observing,  reporting  on,  and  consulting  as  to  the  performance  of  the  Manufacture  of  the  Product.    Upon  Seres’  reasonable 
request, Bacthera will allow Seres up to [***] additional Personnel to visit the  Facility, any other relevant areas for Manufacturing 
of 

9

4.2

4.3

4.4

4.5

4.6

5.

5.1

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

the Products and any other common areas inside the CoE (e.g. entrance) and in particular the Facility, [***] from time to time for 
purposes of consulting on Manufacture of the Product, knowledge transfer and quality issues (the Observer and the [***] additional 
ones are referred to as “Personnel”). Subject to the terms of this Agreement, such Personnel shall not disrupt Manufacturing.  For 
the avoidance of doubt, Bacthera shall not be obliged to make office space available for such Personnel other than the Observer.  
Such Personnel, while at the Facility, shall be subject to and agree to abide by (i) confidentiality obligations towards third parties, 
including by signing appropriate confidentiality agreements, and (ii) Bacthera’s customary practices and operating procedures and 
security  procedures  and  general  site  policies  of  accessing  the  Visp  manufacturing  site  and  entering  the  Facility  provided  to  the 
Personnel. Such Personnel will comply with all reasonable instructions of Bacthera’s employees at the Facility.  Seres will be liable 
for  any  breaches  of  security  by  the  Personnel.    In  addition,  Seres  will  reimburse  Bacthera  for  the  cost  of  any  lost  security  cards 
issued to the Personnel, at the rate of $ 50 per security card. 

As between Bacthera and Seres, Personnel working at the Facility will be and remain employees, contractors, consultants or agents 
of Seres, and Seres will be solely responsible for the payment of compensation for such Personnel (including applicable Federal, 
state  and  local  withholding,  FICA  and  other  payroll  taxes,  workers’  compensation  insurance,  health  insurance,  and  other  similar 
statutory  and  fringe  benefits).    Seres  covenants  and  agrees  to  maintain  workers’  compensation  benefits  and  employers’  liability 
insurance as required by Applicable Laws with respect to all Personnel working at the Facility. 

Seres  will  pay  for  the  actual  cost  of  repairing  or  replacing  to  its  previous  status  (to  the  extent  that  Bacthera  determines,  in  its 
reasonable  judgments,  that  repairs  cannot  be  adequately  effected)  any  property  of  Bacthera  damaged  or  destroyed  by  Personnel, 
provided Seres shall not be liable for repair or replacement costs resulting from ordinary wear and tear. 

The  Facility  will  be  in  operation[***]  weeks  per  year,  with  no  more  than  [***]  weeks  of  shutdown  each  year  following  PPQ 
completion  or  as  otherwise  agreed  by  the  Parties.  Bacthera  will  be  responsible  for  maintenance  (including  preventative 
maintenance)  of  the  Facility  (and  equipment  therein).  Seres  will  reimburse  Bacthera  for  additional  capital  expenses  it  incurs  to 
replace equipment dedicated to Seres in the Facility at the end of its useful life. 

Prior to [***] without Seres prior consent.

SERES OBLIGATIONS

Excuse:

(a)

Bacthera shall not be responsible for any delays directly arising out of Seres’ failure to perform its obligations under this 
Agreement, and Bacthera shall be excused from any failure to perform its obligations under this Agreement (including a 
failure to perform an obligation within the timeframes required under this Agreement), if and to the extent: 

(i)

Seres’  failure  to  perform  its  obligations  under  this  Agreement  or  any  of  its  Exhibits  prevented  Bacthera  from 
performing its obligations;

10

5.2

5.3

5.4

5.5

6.

6.1

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

(ii)

(iii)

such failure by Bacthera would not have occurred but for Seres’ failure to perform its obligations; and

Bacthera  provides  Seres  with  prompt  notice  following  discovery  of  such  nonperformance  by  Seres  and  uses 
Commercially Reasonable Efforts to perform notwithstanding Seres’ failure to perform. Seres acknowledges and 
agrees that such notice from Bacthera of a delay in delivery of SRM will be deemed to satisfy Bacthera’s notice 
provision hereunder in the event of such a delay.

(b)

(c)

(d)

To  the  extent  any  delay  in  performance  by  Bacthera  is  excused  under  this  Section  6.1,  (i)  the  deadlines  for  Bacthera 
performance shall be extended for a reasonable period of time to accommodate the delay actually and reasonably caused 
by Seres’ failure to perform its obligations in accordance with this Agreement; and (ii) Seres shall be responsible for any 
actual and reasonable out of pocket costs and expenses incurred by Bacthera as a result of such delay. 

To  the  extent  any  delay  in  performance  by  Bacthera  is  excused  under  this  Section  6.1  and  such  delay  causes  [***], 
Bacthera shall be entitled to commence invoicing the Suite Fee as of the date the [***]. 

If an extension under Section 6.1(b) results in a cancellation of a Batch that is not included in the Suite Fee, then Seres will 
pay a cancellation fee calculated in accordance with Exhibit 4. 

6.2

Seres Obligations. 

(a)

Without  limiting  the  generality  of  Seres’  other  obligations  under  this  Agreement,  Seres’  obligations  during  each  of  the 
following three phases are: 

CONSTRUCTION (UP TO CQV 
COMPLETION)

PERFORMING SERES OBLIGATIONS UNDER EXHIBIT 1 IN 
ACCORDANCE WITH THE TIMELINES SET FORTH THEREIN.

Technology Transfer

Performing Seres’ obligations under Exhibit 8 (Technology Transfer) in 
accordance with the timelines set forth therein.

Following Marketing Approval at either Scale A 
or B

•Providing Forecasts in accordance with this Agreement
Providing SRM [***]

•
• Performing  Seres’  obligations  under  the  Quality  Agreement 

in accordance with the timelines set forth therein

•
•
•

[***]
[***]
Market release

11

 
 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

(b)

Seres will make decisions in a timely manner and provide Bacthera such information regarding the Manufacturing process 
as may be reasonably requested by Bacthera and otherwise perform the functions expressly stated as a Seres responsibility 
in this Agreement and its Exhibits in accordance with the timelines, if any, set forth therein. 

PURCHASE AND SUPPLY

[***] months prior to the Commencement Date, Seres shall provide to Bacthera a non-binding rolling Forecast of its requests for 
each Product and update it monthly. 

Promptly  upon  Seres’  receipt  of  Marketing  Approval  for  a  Product,  Seres  shall  provide  to  Bacthera  a  non-binding  [***]  month 
Forecast of the number of Batches of each Product to be Manufactured in each month to be updated monthly. The first [***] months 
of a Forecast shall be binding. 

Following receipt of each Forecast, and without limiting its obligations to supply the Product in accordance with this Agreement, 
Bacthera shall promptly provide Seres with a production schedule for the number of Batches included in such Forecast. 

Seres may change the monthly quantity of Batches in the [***] month of a Forecast by up to the greater of [***]% or [***] per 
month or, upon Bacthera approval, more than [***]%.  Seres may change the monthly quantity of Batches in the [***] month of the 
latest [***] month Forecast without limitation; provided that Seres shall not increase the Forecast for a month to Batches in excess 
of the [***]. 

Seres shall submit in writing or electronically Purchase Orders for the Batch(es) to Bacthera.  Bacthera shall deliver the requested 
Batch(es) per the date specified by Seres in the Purchase Order consistent with the [***] of [***] and [***] of [***] (“Delivery 
Date”).  If Seres submits a Purchase Order to Bacthera without providing at least the Minimum Lead Time, Bacthera will not be 
required to deliver the ordered Batch by the requested Delivery Date, but will use Commercially Reasonable Efforts to deliver the 
Batch in the Purchase Order on the requested date.  The “Minimum Lead Time” for a Batch of SER-109 is [***] days, and for 
SER-287 shall be defined by the JSC. For clarity the Minimum Lead Time starts with receipt of the Purchase Order by Bacthera and 
ends at the Release. 

Unless Bacthera expressly notifies Seres otherwise, Bacthera shall be deemed to have accepted any and all such Purchase Orders 
from Seres consistent with the [***] of the Forecast of [***].  In the event that Seres places Purchase Orders for Batches in excess 
of such binding period of the Forecast, then Bacthera shall, subject to available capacity and as reasonable as possible, deliver the 
excess Batches on the Delivery Date. 

Seres  may  cancel  a  Batch,  including  production  of  a  Batch  to  be  Manufactured  under  a  Purchase  Order,  upon  written  notice  to 
Bacthera. Seres shall pay the cancellation fee (the “Cancellation Fee”) as set forth in Exhibit 4.

7.

7.1

7.2

7.3

7.4

7.5

7.6

7.7

12

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

8.

8.1

8.2

8.3

8.4

8.5

8.6

8.7

8.8

8.9

MATERIALS

Seres or its designees shall obtain and supply to Bacthera the SRM [***].  Seres shall further provide to Bacthera such data and 
information as necessary to apprise Bacthera of the proper storage and safe handling requirements for the SRM delivered by Seres 
or its designees, compliant to the Material Specifications. Bacthera will notify Seres as to Bacthera’s requirements for the SRM with 
reasonable lead-time prior to commencement of Manufacturing a Batch. Bacthera will promptly notify Seres of any SRM damaged 
or lost while in the possession of or under the control of Bacthera. Bacthera will promptly reimburse Seres for the costs of the SRM, 
such cost not to exceed [***].

Exhibit 7 sets forth the Parties’ understanding as of the Effective Date of the Raw Materials and Consumables that are to be used in 
the  testing;  packaging  (primary  and  secondary);  preparation;  formulation;  processing;  production;  filling;  component  assembly; 
finishing; analysis; labelling; quality control testing (including in-process, release, when applicable); and Release of the Products 
(the “Exhibit 7 Materials”).  At least [***], the Parties will update Exhibit 7 to reflect any [***] that should be included thereon.

Bacthera will [***]

Bacthera shall [***]. 

Bacthera shall be responsible for and supply in accordance with the relevant Material Specifications, [***] in adequate quantities to 
be used by Bacthera for the Manufacture of the Product.  The Parties agree that Bacthera is [***].

Bacthera shall procure [***], in each case that are compliant to the applicable Material Specifications. 

Bacthera will instruct the suppliers [***]. Promptly, but in any event, within [***].

Upon full payment, [***]. Bacthera shall procure [***]. 

Bacthera shall handle the Materials in accordance with the applicable requirements of this Agreement and the Quality Agreement.  
For Exhibit 7 Materials that do not meet applicable requirements of this Agreement and the Quality Agreement, [***].  Bacthera 
shall use Materials on a first-in first-out basis.

8.10

Bacthera shall maintain an accurate inventory of Materials on hand throughout the Term and provide Seres a monthly report (each, 
an “Inventory Report”)  of  the  quantity  of  each  Material  in  its  inventory  (which  report  shall  include  identification,  quantity  and 
value).  On each anniversary of the Commencement Date, Bacthera shall conduct, with a Seres representative, a physical inventory 
of  all  Materials  and  equipment  and  a  quarterly  risk-based  physical  inventory  thereof  and  promptly  provide  Seres  with  a  report 
indicating any variations from the latest Inventory Report. 

13

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

8.11

8.12

9.

9.1

9.2

9.3

9.4

Without limiting each Party’s obligation to comply with the terms of this Agreement, each Party shall use Commercially Reasonable 
Efforts to minimize the other Party’s Raw Material and Consumable costs.

Upon cancellation of any Batch or termination or expiration of the Agreement, all unused Materials shall, at Seres’ election, be (a) 
held by Bacthera for future use for the Manufacture of Product for up to [***] months under the provisions of Section 9.10, (b) 
delivered to Seres, or (c) disposed of by Bacthera.  Destruction and delivery costs will be borne by Seres, unless Seres terminates 
this Agreement under Section 18.2(a)(i), in which case Bacthera shall bear such costs.

MANUFACTURE AND DELIVERY

Generally.    Bacthera  is  responsible  for  providing  resources  (facilities,  personnel,  infrastructure)  necessary  to  Manufacture  the 
Product in accordance with the Forecast. 

Testing.  [***] prior to delivery of such Batch by Bacthera to Seres or its designee. [***] shall conduct the [***]. Notwithstanding 
the foregoing, [***].

Facility.  Bacthera shall Manufacture each Product at the Facility. Bacthera shall maintain, the Facility and any other area relevant 
for the Manufacture of the Product(s) in a state of repair and operating efficiency consistent with the requirements of cGMP and 
other Applicable Law. In the event any change in the requirements of cGMP and other Applicable Law results in any regulatory or 
other costs to Bacthera, or requires that Bacthera make any expenditures at the Facility, such costs and expenditures shall be made 
and reimbursed in accordance with the procedures set forth in Exhibit 4.

Changes to Product Specifications. In the event any change in the applicable Product Specifications for a Product (as they may 
have changed from time to time under this Agreement) requested by Seres or mandated by Applicable Law results in any regulatory 
or  other  costs  to  Bacthera,  or  requires  that  Bacthera  make  any  expenditures  at  the  Facility,  such  costs  and  expenditures  shall  be 
made and reimbursed in accordance with the procedures set forth in Exhibit 4.  Any change to the Product Specifications will be 
subject to Bacthera approval, which approval shall not be unreasonably withheld, conditioned or delayed.

9.5

[***].

(a)

(b)

(c)

Bacthera will use Commercially Reasonable Efforts to [***].

Promptly after the completion of each of the first [***] Batches [***] of each Product, Bacthera will report to Seres the 
[***]. 

Following  (b)  the  Parties  shall  discuss  and  agree  on  an  [***]  based  on  the  [***]  in  respect  of  such  Batches,  to  be 
determined by the JSC from review of [***]. 

9.6

Acceptance and Rejection.

(a)

Bacthera  shall  deliver  to  Seres,  concurrently  with  the  delivery  of  each  Batch  of  Product  that  has  met  the  Product 
Specifications, a Certificate of Compliance and such other 

14

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

documents and materials required to be delivered under the applicable Quality Agreement.  Seres shall promptly examine 
such  Batch  to  determine  whether  the  Product  conforms  to  the  applicable  Product  Specifications.  Seres  shall  notify 
Bacthera  in  writing  of  any  investigation  or  rejection  of  a  Product  based  on  any  claim  that  it  fails  to  meet  the  Product 
Specifications  or  shortage  in  quantity  of  any  individual  shipment  of  any  Product  within  [***]  Business  Days  after 
Bacthera’s  Release  (or,  in  the  case  of  any  defects  not  reasonably  susceptible  to  discovery  upon  receipt  of  the  Product, 
within [***] after discovery by Seres); provided that Bacthera will not have any liability under this paragraph for rejected 
Product more than [***] after Release.  If Seres fails to notify Bacthera of the non-conformity within the applicable period, 
then  the  delivery  will  be  considered  to  have  been  accepted  by  Seres.    Bacthera  will  have  no  liability  for  any  non-
conformance for which it has not received notice within the applicable period. Seres shall return any defective Batches to 
Bacthera  or  place  such  Batches  in  quarantine.  Any  such  notice  shall  describe  in  reasonable  detail  the  defect  or  non-
conformity, and Seres shall initiate an investigation in consultation with Bacthera to determine whether the Batch should 
be accepted or rejected. 

(b)

If the Parties disagree on the outcome of the investigation, either Party may treat the matter as a dispute under Section 17.

9.7

Costs Associated with Non-Conforming Batches (including In-Process Batches).

(a)

(b)

(c)

(d)

Until the [***] has been defined, [***]. 

Subject  to  Section  9.7(c),  if  a  Batch  fails  to  conform  to  the  applicable  Product  Specifications,  and  such  failure  was 
attributable  to  Bacthera’s  breach  of  this  Agreement  or  the  Quality  Agreement,  or  [***],  Bacthera  shall  replace  the  non-
conforming Batch as promptly as practicable.  Unless the SRM contained latent defects that were not reasonably detectable 
by Bacthera upon receipt thereof, (i) Bacthera shall not charge for the replacement Batch and (ii) [***]. 

Upon Bacthera’s instructions, Seres shall destroy or return any non-conforming Batch, the costs of which will be borne by 
Bacthera  if  the  non-conformance  was  attributable  to  Bacthera’s  failure  to  comply  with  this  Agreement  or  the  Quality 
Agreement.

The  costs  of  handling,  storage,  transportation,  treatment  and  disposal  of  Products,  or  reproduction  thereof,  pursuant  to 
Section 9.1 shall be allocated between the Parties in accordance with Sections 9.7(a) and 9.7(b).

9.8

Delivery.    Bacthera  shall  deliver  all  released  Products  [***]  at  the  Facility.  On  or  before  the  Delivery  Date  specified  in  the 
applicable Purchase Order, Bacthera shall, as directed by Seres, deliver the Product to a carrier designated by Seres or into storage 
at  the  Facility.    Bacthera  will  package  and  label  the  Product  for  shipment  in  accordance  with  the  Master  Batch  Record  and 
Bacthera’s standard practices in effect at the time of performance by Bacthera.  All Purchase Orders shall be filled in compliance 
with the terms and conditions of this Agreement and the Master Batch Record. Bacthera shall be responsible for preparation  and 
submission of export declaration documents to Seres required for the Swiss export procedure of the Products. Any 

15

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

third-party costs (e.g. duties, taxes, shipment) related to exporting will be reimbursed by Seres. Seres shall be responsible for the 
performance of the export clearance, import processes and clearances of the Products into the destination countries. 

9.9

Title. 

(a)

(b)

[***]. 

[***]. 

9.10

9.11

9.12

Storage. Bacthera will store the Materials, intermediates, and Products.  In the event that storage outside the CoE is required, both 
Parties shall evaluate if storage outside of the Facility is possible.  Bacthera may charge for such storage to the extent permitted 
under  Exhibit  4.    Bacthera  shall  store  all  Materials  and  Products  in  accordance  with  Applicable  Law  and  Seres’  reasonable 
instructions.  With respect to Products intended for commercial distribution, Bacthera shall maintain at least the amount of safety 
stock of Materials (the “Safety Stock”) necessary to supply the volume of Product included in the latest Forecasts for the next [***] 
days,  to  be  further  defined  prior  to  CQV  Completion.    Such  Safety  Stock  shall  be  stored  in  accordance  with  Seres’  reasonable 
instructions and cGMPs, and shall be maintained for the period required by cGMPs, unless otherwise approved by Seres.  Bacthera 
shall use Materials from Safety Stock on a first-in first-out basis.

Batch Failure. After completion of the ***subject to Section  7.4, if during a calendar year Bacthera fails to deliver more than [***] 
if the cause of the defect was that (i) the SRM contained latent defects that were not reasonably detectable by Bacthera upon receipt 
thereof or (ii) the root cause of the failure is deemed to be the analytical method itself, which was executed by Seres.  [***]. 

Improvements.    Bacthera  shall  use  Commercially  Reasonable  Efforts  to  improve  productivity  and  Batch  yield,  including  the 
achievement of efficiency gains resulting from continuous improvement activities and improvements to Manufacturing processes, 
and  other  opportunities  to  reduce  the  costs  and  Charges  that  are  to  be  paid  by  Seres.    Upon  identification  of  an  opportunity  for 
improved productivity or other cost reduction, Bacthera shall prepare a proposal for submission to the JSC.  Such proposal shall 
identify any investment that will be required from each Party and how the Charges and costs will be reduced to reflect a reasonable 
return to each Party of its investment as described in Exhibit 4, [***].  Bacthera shall report on its efforts under this Section 9.12 at 
each JSC meeting.

9.13

[***]. [***].

10.

INTELLECTUAL PROPERTY

10.1

Intellectual Property. 

(a)

Except  as  the  Parties  may  otherwise  expressly  agree  in  writing,  each  Party  shall  continue  to  own  its  existing  patents, 
trademarks, copyrights, trade secrets and other Intellectual 

16

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

Property (“Background Intellectual Property”), without conferring any interests therein on the other Party. 

(b)

(c)

Without  limiting  the  generality  of  Section   10.1(a),  but  subject  to  Section   10.1(c),  as  between  Bacthera  and  Seres,  Seres 
shall own all right, title and interest arising under Applicable Law in and to the following developed by Bacthera or Seres 
under this Agreement: (i) all Products and the SRM, (ii) the processes, technology, know-how and techniques related to the 
Manufacture  thereof  that  are  not  usable  other  than  in  the  Manufacture  of  the  Products,  (iii)  the  labels  for  the  Products 
(including  any  trademarks  and  copyrights  associated  therewith),  and  (iv)  except  as  provided  in  Section   10.1(c),  any 
inventions,  discoveries,  innovations,  developments  and  improvements  to  any  of  the  foregoing,  in  each  case,  whether 
patentable or copyrightable or not (collectively, “New Seres Intellectual Property”).  [***].

Without limiting the generality of Section  10.1(a), as between Bacthera and Seres, Bacthera shall own all right, title and 
interest arising under Applicable Law in and to (i) all and any Intellectual Property developed by Bacthera in the course of 
its  performance  of  its  obligations  under  this  Agreement  to  the  extent  that  its  use  can  reasonably  be  considered  to  be 
generally  and  primarily  applicable  to  manufacturing  chemical  or  biological  products  or  product  components  or 
intermediates thereof for multiple products (including the Products) that do not involve New Seres Intellectual Property,
and  (ii)  any  inventions,  discoveries,  innovations,  developments  and  improvements  based  on  Bacthera’s  Background 
Intellectual  Property  (collectively,  “New  Bacthera  Intellectual  Property”).    Neither  Seres  nor  any  third  party  shall 
acquire any right, title or interest in New Bacthera Intellectual Property by virtue of this Agreement or otherwise, except to 
the extent expressly provided herein.  [***]. 

(d)

Neither  Party  shall  disclose  the  other  Party’s  Confidential  Information  that  is  included  in  the  other  Party’s  Intellectual 
Property  in  any  patent  application  without  the  other  Party’s  prior  consent,  which  may  not  be  unreasonably  withheld, 
conditioned or delayed.

10.2

License. 

(a)

Subject to the terms of this Agreement, Seres will grant Bacthera on the Commencement Date a non-exclusive, royalty-
free, revocable license to make the Products in the Facility during the Term and solely at the Facility. Such license shall 
not  be  sublicensable,  assignable  or  transferable  in  whole  or  in  part.    In  the  event  that  Bacthera  becomes  aware  of  any 
possible  or  actual  infringement  by  a  third  party  of  New  Seres  Intellectual  Property,  it  shall  provide  immediate  written 
notice to Seres.

(b)

[***].

1.1

Technology Transfer. 

(c)

Seres  shall  be  responsible  for  providing  complete  and  correct  information  regarding  the  Manufacture  of  the  Products 
reasonably requested by Bacthera and making personnel knowledgeable about the Products and the Manufacturing process 
thereof reasonably 

17

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

available  to  Bacthera  upon  Bacthera’s  reasonable  request,  in  each  case  to  the  extent  required  to  enable  the  Bacthera 
Personnel  responsible  for  the  Design  and  Construction  Work  and  the  Manufacture  of  the  Products  to  perform  their 
obligations under this Agreement (“Technology Transfer Plan”, a draft of which is attached hereto as Exhibit 8 and shall 
be finalized within [***] days of the Effective Date). The Technology Transfer Plan will entail a description of the services 
to  be  provided,  Product  Specifications,  a  schedule  for  the  completion  of  the  technology  transfer,  and  such  other 
information as is necessary for the Manufacture of the Product.

(d)

[***].

10.3

10.4

11.

11.1

11.2

11.3

11.4

Disclaimer.  Except as otherwise expressly provided herein, nothing contained in this Agreement shall be construed or interpreted, 
either expressly or by implication, or otherwise, as: (i) a grant, transfer or other conveyance by either Party to the other of any right, 
title, license or other interest of any kind in any of its Intellectual Property, (ii) creating an obligation on the part of either Party to 
make  any  such  grant,  transfer  or  other  conveyance  or  (iii)  requiring  either  Party  to  participate  with  the  other  Party  in  any 
cooperative development program or project of any kind or to continue with any such program or project.

Confidentiality of Intellectual Property.    Intellectual  Property  shall  be  deemed  to  be  the  Confidential  Information  of  the  Party 
owning such Intellectual Property.  The protection of each Party’s Confidential Information is described in Section  14. 

SUBCONTRACTORS

Bacthera  shall  not  subcontract  its  obligations  under  this  Agreement  (other  than  for  the  Design  and  Construction  Work  or  to  an 
Affiliate) without the prior written consent of Seres, which consent shall not be unreasonably withheld, conditioned or delayed.  As 
of the Effective Date, Seres has given its consent to the subcontractors set forth in Exhibit 9. 

 [***].

Bacthera  will  cause  each  subcontractor,  Affiliate,  and  person  who  is  involved  in  the  conception  or  development  of  Intellectual 
Property  that  is  to  be  owned  by  Seres  or  is  provided  access  to  Seres’  Confidential  Information  to  sign  non-disclosure  and 
assignment of invention agreements reasonably acceptable to Seres.

Subject  to  Section  11.1,  all  Manufacturing  to  be  provided  in  relation  to  the  Product  or  the  Design  and  Construction  Work  to  be 
performed  under  this  Agreement  according  to  Exhibit  1  may  be  performed  by  Bacthera,  a  subcontractor  or  by  an  Affiliate  of 
Bacthera.

12.

REGULATORY AND QUALITY MATTERS

12.1

Permits, Registrations and Licenses. 

(a)

Seres  will  be  responsible,  at  its  expense,  for  obtaining,  maintaining,  updating  and  remaining  in  compliance  with  all 
permits, licenses and other authorizations during the Term, which are necessary or required under Applicable Laws and 
which are applicable to 

18

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

the  use  and  commercial  distribution  of  Product  Manufactured  by  Bacthera  hereunder.  Bacthera  will  provide  reasonable 
cooperation  and  assistance  in  connection  with  Seres  filing  the  applicable  Marketing  Approvals  at  the  rates  set  forth  in 
Section 2.5 of Exhibit 4.

Bacthera will be responsible for, at its expense, obtaining and maintaining all generally required permits, registrations and 
licenses  applicable  to  the  Facility,  including  any  such  permits,  registrations  and  licences  applicable  to  the  CoE  and 
necessary for the occupancy, access and use of the Facility (other than the permits, licenses and authorizations that Seres is 
obligated  to  obtain  under  Section   12.1(a)),  including  any  that  are  required  for  the  performance  of  the  Design  and 
Construction  Work  and  to  the  production  of  pharmaceutical  and  biological  products  generally  to  the  extent  required  for 
Bacthera to carry out its regulatory and Manufacturing obligations hereunder.

Additional  requirements  for  permits,  licenses  and  other  authorizations  relating  to  the  design  and  construction  of  the 
Facility, any other relevant areas for Manufacturing of the Products and any other common areas inside the CoE are set 
forth in Exhibit 1.

(b)

(c)

Quality Agreement.  At least [***], the Parties shall agree in writing to a Quality Agreement.   [***]. The Quality Agreement is 
intended  to  supplement  this  Agreement  and  shall  be  incorporated  in  this  Agreement  in  its  entirety,  except  that  in  the  event  of  a 
conflict between any term, condition or provision of this Agreement and any term, condition or provision of the Quality Agreement, 
the  applicable  term,  condition  or  provision  of  the  Quality  Agreement  shall  control  unless  specifically  set  forth  otherwise  in  this 
Agreement or otherwise agreed in writing by the Parties.

Facility Audits.  Representatives (including internal and external auditors) of Seres and its Affiliates (a) shall, upon Seres’ request, 
be  permitted  to  review  Bacthera’s  quality  system  records,  including,  without  limitation,  quality  control  and  standard  operating 
procedures and related documents; and (b) may at Seres’ costs, during normal business hours and with reasonable advance notice, 
conduct a supplier audit of the Facility.  Bacthera shall promptly remedy or cause the remedy of any deficiencies that may be noted 
in any such audit.  The time spent by Bacthera Personnel in connection with Seres’ audits of the Facility in excess of one per twelve 
(12) month period (excluding inspections by Regulatory Authorities) shall be charged at a daily rate of [***].

Inspections by Regulatory Authorities.    Seres  shall  give  Bacthera  advance  notice,  to  the  extent  that  advance  notice  is  given  to 
Seres,  of  any  site  visit  to  the  Facility  by  any  Government  Authority,  the  purpose  of  which  is  to  inspect  the  Manufacture  of  any 
Product or the compliance status of the Facility under Applicable Law, in accordance with the terms and conditions of the Quality 
Agreements.  In any event, Bacthera shall advise Seres of the occurrence of any such visit immediately upon such visit, including 
visits that are unrelated to the Products and any safety or environmental inspections, and Bacthera shall furnish to Seres all material 
information supplied to, or supplied by, any Government Authority, including the Form 483 (and foreign equivalent) observations 
and responses, to the extent that such information relates to such Product or the ability of Bacthera to comply with the terms of this 
Agreement  or  Applicable  Law.  In  addition,  and  without  limitation  on  the  foregoing,  to  the  extent  permitted  by  the  applicable 
Government  Authority,  representatives  of  Seres  shall  be  permitted  to  participate  as  observer  or  active  as  subject  matter  expert  if 
required in any such site visit by a Government Authority, and Bacthera shall provide Seres with a reasonable opportunity to review 
and comment upon any response to 

19

12.2

12.3

12.4

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

12.5

12.6

12.7

the Government Authority to the extent the response relates to Product prior to delivery to the Government Authority. 

Adverse  Event  Reporting.    Seres  shall  be  responsible  for  reporting  adverse  events  and  complaints  with  respect  to  any  Product 
(including the Materials), and for responding to any such reports and complaints, in accordance with the terms and conditions of the 
applicable  Quality  Agreement.    Bacthera  shall  promptly  notify  Seres  of  any  information  Bacthera  receives  related  to  an  adverse 
event or complaint.

Recalls.  In the event Seres is required to recall any Product, or elects to institute a voluntary recall, Seres will be responsible for 
coordinating  such  recall.    Seres  will  promptly  notify  Bacthera  of  such  recall  and  provide  Bacthera  with  a  copy  of  all  documents 
relating  to  such  recall.  Bacthera  will  cooperate  with  Seres  in  connection  with  any  recall,  at  Seres’  expense,  unless  the  recall  is 
determined to have been necessitated by [***] to perform the Manufacturing activities at issue in accordance with Applicable Law 
or this Agreement. [***] will be responsible for all of the costs and expenses of recalls (including but not limited to costs associated 
with  receiving  and  administering  the  recalled  Product  and  notification  of  the  recall  to  those  persons  whom  [***]  deems 
appropriate), except for recalls determined to have been necessitated by [***] to perform the Manufacturing activities at issue in 
accordance with Applicable Law or this Agreement, in which case [***] will be responsible for all of the costs and expenses of such 
recalls  to  the  extent  caused  [***]  to  perform  Manufacturing  activities  at  issue  in  accordance  with  Applicable  Law  or  this 
Agreement. 

Health,  Safety  and  Environmental  Compliance.  All  Manufacturing  operations  shall  be  performed  using  appropriate  safety 
measures and containment techniques as dictated by Applicable Law and industry standards.  Bacthera shall be solely responsible 
for implementing and maintaining health and safety procedures for the Manufacture of Product and performance of services under 
this  Agreement  and  for  the  handling  of  any  materials  or  hazardous  waste  used  in  or  generated  by  such  activities.    Bacthera,  in 
consultation with Seres, shall develop safety and handling procedures for Materials and Product; provided, however, that Seres shall 
have  no  responsibility  for  Bacthera’s  health  and  safety  program.  The  generation,  collection,  storage,  handling,  transportation, 
movement and release of hazardous materials and waste generated in connection with the Manufacture of Product and other services 
under this Agreement shall be the responsibility of Bacthera at Bacthera’s cost and expense, unless otherwise agreed to in writing by 
the  Parties  for  special  situations  or  conditions.  Without  limiting  other  legally  applicable  requirements,  Bacthera  shall  prepare, 
execute and maintain, as the generator of waste, all licenses, registrations, approvals, authorizations, notices, shipping documents 
and  waste  manifests  required  under  Applicable  Law.    Bacthera  shall  promptly  notify  Seres  of  any  significant  safety  or 
environmental issues discovered by Bacthera (whether or not in connection with a visit by Regulatory Authorities). 

12.8

Distribution.  In the event that Seres seeks to distribute Product, including as an investigational medicinal product, Seres will be 
responsible at its own expense for obtaining all permits, licenses and other authorizations required by Applicable Law to distribute 
Product in the applicable jurisdiction. 

20

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

13.

CHARGES, INVOICING, PAYMENT AND TAXES

13.1

Charges. 

The Charges under this Agreement (and permitted and required adjustments thereto) are set forth in Exhibit 4.

13.2

Invoicing. 

(a)

(b)

Bacthera  shall  promptly  invoice  Seres  for  the  Suite  Fee  under  Exhibit  4  on  a  monthly  basis  in  arrears  or  Milestone 
Payments under Section 11.1 of Exhibit 1 upon achievement of the milestone. The invoice for the Suite Fee must be issued 
by the first Business Day of each month. Bacthera shall send invoices to [***].

Bacthera shall invoice Seres for the Additional Batch Fee for each Batch in accordance with Exhibit 4 upon Release of the 
Batch.

Payment Terms.  Except as otherwise stated in Exhibit 4, Seres shall pay all undisputed amounts pursuant to this Agreement within 
[***] days after receipt of an invoice therefor from Bacthera by direct wire transfer of Swiss Francs in immediately available funds 
in the requisite amount to  [***].

Disputed Amounts.  [***].

Payment Default.  If Seres fails to pay any undisputed invoice on the due date, interest shall accrue on any amount overdue at the 
Interest Rate on a day-to-day basis until full payment.  If such payment exceeds [***] and Seres fails to pay within [***] days after 
notice of non-payment, Bacthera may, at its sole discretion, and without prejudice to any other of its accrued rights, be entitled to 
suspend the provision of the Manufacture and or delivery of Product until all undisputed amounts that are overdue have been paid in 
full, including the Interest Rate. 

13.3

13.4

13.5

13.6

Taxes.

(a)

Retained Taxes. Each Party will be responsible for the payment of any taxes, levies and charges on its own personal and 
real  property,  business  and  franchise  and  privilege  taxes  on  its  business,  and  for  taxes  based  on  its  net  income  or  gross 
receipts  (“Income  Taxes”),  in  each  case  that  are  imposed  by  applicable  Government  Authorities  (collectively,  the 
“Retained Taxes”). If required by Applicable Law, Seres will be entitled to withhold an amount in respect of any Income 
Tax from any payment to Bacthera only to the extent Bacthera does not benefit of any exemption of withholding tax under 
applicable tax treaties or to the limit of any reduced withholding tax Bacthera may benefit under applicable tax treaties. 
Seres  shall  inform  Bacthera  in  writing  in  advance  of  any  such  required  tax  withholding,  as  well  as  of  any  reduced 
withholding  tax  or  exemption  of  withholding  tax  Bacthera  may  benefit  under  applicable  tax  treaties  and  the  respective 
formalities, and Bacthera shall provide applicable internal revenue service forms or other tax authority forms to ensure that 
any  withholding  tax  treaty  benefits  qualifications  are  met.  If  any  amounts  in  respect  of  Income  Taxes  are  withheld  by 
Seres, Seres shall pay such 

21

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

(b)

(c)

amounts over to the applicable Governmental Authority and provide documentation to Bacthera evidencing such payment.

Export/Import Taxes.    Seres  shall  be  responsible  for  the  taxes,  duties,  tariffs,  consular  fees,  levies,  penalties,  and  other 
charges (other than VAT, as defined in Section 13.6(d)) imposed by applicable Governmental Authorities on the import or 
export of the Products (“Export/Import Taxes”) to the extent such Party is responsible for such amounts in accordance 
with the Incoterms® 2020 delivery terms set forth in Section 9.8.

Other Taxes.  Seres shall be responsible for all goods, VAT(as defined in Section 13.6(d)) , sales, use, consumption and 
other  similar  taxes,  levies  and  charges  (other  than  Retained  Taxes  and  Export/Import  Taxes)  imposed  by  applicable 
Governmental Authorities in connection with the delivery of the Products to Seres or any invoice to the extent that such 
taxes, levies or charges cannot be recovered by Bacthera (or representative member of any group of which Bacthera forms 
part  for  VAT  purposes)  from  the  applicable  Governmental  Authorities.    If  Bacthera  is  required  to  pay  any  part  of  such 
taxes,  levies  and  charges,  Seres  shall  reimburse  Bacthera  for  such  taxes,  levies  and  charges.  Notwithstanding  the 
foregoing, Seres will not be responsible for any VAT (and therefore any payments by Seres under this Agreement will be 
inclusive of VAT) to the extent that such VAT is not recoverable by Bacthera (or representative member of any group of 
which Bacthera forms part for VAT purposes) but which would have been recoverable by it (or representative member of 
any group of which it forms part for VAT purposes) had it qualified as an importer of Materials and other goods imported 
to Switzerland under this Agreement for the purposes of Swiss import VAT (art. 51 Swiss Federal Act on Value Added Tax 
(SR 641.20)). 

(d)

VAT. 

(i)

(ii)

(iii)

Value Added Tax (“VAT”) means (i) on Swiss territory the value added tax (VAT) which is levied in accordance 
with the Federal Act on Value Added Tax (SR 641.20) and the Ordinance on Value Added Tax (SR 641.201), (ii) 
within the European Union, such Tax as may be levied in accordance with (but subject to derogations from) the 
Directive 2006/112/EC and (iii) outside the European Union, any Tax levied by reference to added value, sales 
and/or consumption. 

Each Party intends and expects that to the extent that Bacthera (or its Affiliate) makes any supply of Product or 
any  other  supply  of  goods  and  services  to  Seres  under  this  Agreement  that  is  within  the  scope  of  VAT,  such  a 
supply will be zero rated for VAT purposes; and

Each  Party  agrees  that  to  the  extent  that  a  supply  of  Materials  is  subject  to  a  charge  to  import  VAT,  Bacthera 
expects to reclaim any such VAT as input tax and will use Commercially Reasonable Efforts to maximize its VAT 
recovery position.

(e)

Cooperation.    Each  Party  shall  cooperate,  as  reasonably  requested  by  the  other,  to  minimize  the  amount  of  all  amounts 
payable  to  Government  Authorities  under  this  Section  13.6,  including  by  claiming  any  available  exemption  or  any 
available refund, credit 

22

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

13.7

13.8

14.

14.1

or other recovery, and by executing and filing any invoices, forms or certificates reasonably required, in each case, to the 
extent that doing so would not adversely and materially affect such Party.

Audits.    Bacthera  shall  maintain  full  and  accurate  financial  records  pertaining  to  amounts  invoiced  under  this  Agreement  on  a 
consistent basis and in accordance with [***].  Bacthera shall maintain such records for three (3) years after their creation or such 
longer  period  as  may  be  required  under  Applicable  Law.    Such  records  shall  include  all  invoices  (including  invoices  from 
subcontractors) and the original documentation for any out-of-pocket expenses incurred in connection with this Agreement.  Upon 
Seres’ request, Bacthera will provide Seres or its independent auditor with access to financial records and other documentation and 
information (including third party invoices and any other amounts paid or incurred by Bacthera that are paid directly or indirectly by 
Seres under this Agreement) as reasonably necessary for Seres to verify the accuracy of invoices. 

Foreign Corrupt Practices Act.  The Parties confirm that any compensation payable hereunder does not constitute remuneration or 
other means to attempt to corruptly influence any person to act in his official capacity to assist either Seres or Bacthera in obtaining 
or retaining business in violation of the U.S. Foreign Corrupt Practices Act, the UK Bribery Act, any Applicable Laws enacted to 
implement the  Organisation for Economic Co-operation and Development (OECD) Convention on Combating Bribery of Foreign 
Officials  in  International  Business  Transactions  or  other  Applicable  Laws  relating  to  bribery,  corruption,  kick-backs  or  other 
improper payments (“Anti-Corruption Laws”).  In connection with each Party’s obligations under this Agreement, neither Seres 
nor Bacthera has made or offered, or hereafter will make or offer, directly or indirectly, any payment or inducement to any person 
with  the  intent  to  corruptly  influence  such  person  to  act  in  his  official  capacity  to  assist  either  Seres  or  Bacthera  in  obtaining  or 
retaining business in violation of applicable Anti-Corruption Laws.  In connection with this Agreement, neither Party will give to or 
accept  from  any  other  person  anything  of  value  in  order  to  obtain  an  improper  business  advantage.  Any  breach  of  the  foregoing 
provision will be deemed a material breach of this Agreement that is not capable of relief and will entitle the nonbreaching Party to 
terminate this Agreement with immediate effect.

CONFIDENTIALITY

Confidential Information.  In  connection  with  this  Agreement,  Seres  may  disclose  certain  confidential  information  that  is  Seres 
Intellectual  Property  to  Bacthera  and  its  Affiliates  and  Bacthera  may  disclose  certain  confidential  information  that  is  Bacthera 
Intellectual  Property  and  Licensed  Know-How  to  Seres  (such  confidential  information,  “Confidential  Information”).    Without 
limiting the foregoing, the terms of this Agreement and the information shared thereunder are the Confidential Information of both 
Parties  and  shall  be  treated  confidentially  by  each  of  the  Parties,  subject  to  the  exceptions  set  forth  in  Section   14.6.  In  addition, 
[***] and shall be treated confidentially by Bacthera and the Bacthera Personnel.  Information that was exchanged by the Parties 
prior to the Effective Date pursuant to the Confidential Disclosure Agreement shall be governed by such Confidential Disclosure 
Agreement, provided that any such information that is subsequently exchanged by the Parties under this Agreement shall, from that 
time, be governed by the terms of this Agreement. 

23

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

14.2

14.3

Restrictions. A Party and its Affiliates (the “Receiving Party”) that receives Confidential Information from the other Party and its 
Affiliates (the “Disclosing Party”)  shall  keep  all  of  the  Disclosing  Party’s  Confidential  Information  in  confidence  with  the  same 
degree of care with which the Receiving Party holds its own Confidential Information (but in no event use less than Commercially 
Reasonable  Efforts  to  prevent  unauthorized  disclosure).    A  Receiving  Party  shall  not  use  the  Disclosing  Party’s  Confidential 
Information except in connection with the performance of its obligations and exercise of its rights under this Agreement. 

Exceptions.  The obligations of confidentiality and restrictions on use of Confidential Information under Section  14.2 do not apply 
to any information that the Receiving Party can prove by competent written evidence: (a) is now, or hereafter becomes, through no 
act or failure to act on the part of the Receiving Party, generally known or available to the public; (b) is known by the Receiving 
Party  at  the  time  of  receiving  such  information,  other  than  by  previous  disclosure  of  the  Disclosing  Party,  or  its  Affiliates, 
employees, agents, consultants, or contractors; (c) is hereafter furnished to the Receiving Party without restriction by a third party 
who  has  no  obligation  of  confidentiality  or  limitations  on  use  with  respect  thereto,  as  a  matter  of  right;  or  (d)  is  independently 
discovered  or  developed  by  the  Receiving  Party  without  the  use  of  Confidential  Information  belonging  to  the  Disclosing  Party. 
Specific  information  shall  not  be  deemed  to  be  within  any  of  the  foregoing  exclusions  merely  because  it  is  embraced  by  more 
general information falling within those exclusions.

14.4

Permitted Disclosures. The Receiving Party may disclose Confidential Information belonging to the Disclosing Party as expressly 
permitted by this Agreement or if and to the extent such disclosure is reasonably necessary in the following instances:

(a)

(b)

(c)

(d)

prosecuting or defending disputes between the Parties; 

Regulatory Filings for a Product; 

complying with Applicable Laws, including securities laws; 

disclosure to its and its Affiliates’ employees, consultants, contractors, subcontractors and agents, and to sublicensees upon 
informing the Disclosing Party in writing, in each case on a need-to-know basis in connection with the Manufacture (and 
in  the  case  of  Seres  as  Receiving  Party,  importing,  exporting,  offering  for  sale,  selling,  commercialization,  or  other 
exploitation)  of  the  Products,  in  each  case  under  written  obligations  of  confidentiality  and,  except  as  necessary  for  the 
provision of the Manufacture under this Agreement, non-use at least as stringent as those herein; and

(e)

[***].

Notwithstanding the foregoing, if a Party is required to make a disclosure of the other Party’s Confidential Information pursuant to 
Section  14.4(b) or  (c), it shall, except where impracticable, give reasonable advance notice to the other Party of such disclosure and 
use efforts to secure confidential treatment of such Confidential Information at least as diligent as such Party would use to protect its 
own Confidential Information, but in no event less than Commercially Reasonable Efforts .  Any information disclosed pursuant to 
Section  14.4(b) or  (c) remains 

24

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

14.5

14.6

14.7

15.

15.1

Confidential  Information  and  subject  to  the  restrictions  set  forth  in  this  Agreement,  including  the  foregoing  provisions  of  this 
Section  14.4.

Public Domain Information and Residual Knowledge.  Nothing in this Agreement shall prevent a Party from using any know-
how that is in the public domain.  A Party shall also not be restricted under, and shall not be in breach of, this Agreement from 
using, within or outside this Agreement and for any purpose, any general knowledge, skill, and expertise acquired by its employees 
(or its Affiliates’ employees) in their performance of this Agreement (“Residuals”) solely to the extent such Residuals shall have 
been retained in the unaided memory (without intentional memorization) of such employees in intangible form and without use by 
the Party or such employees of tangible copies of any Confidential Information of the other Party; provided that this provision will 
not be deemed in any event to provide any right to infringe the patent rights of the other Party or of third parties that have licensed 
or provided materials to the other Party; provided, further, that a Party’s use of such Residuals is on an “as is, where is” basis, with 
all faults and all representations and warranties disclaimed and at such Party’s sole risk.

Disclosure  of  Agreement.    Notwithstanding  the  foregoing,  either  Party  or  its  Affiliates  may  disclose  the  relevant  terms  of  this 
Agreement: (a) to the extent required or advisable to comply with the rules and regulations promulgated by the U.S. Securities and 
Exchange Commission or any equivalent governmental agency in any country in the territory where  the Product is sold, provided 
that  such  Party  shall  submit  a  confidential  treatment  request  in  connection  with  such  disclosure  and  shall  submit  with  such 
confidential treatment request only such redacted form of this Agreement as may be mutually agreed in writing by the Parties; (b) 
upon  request  from  a  Governmental  Authority  (such  as  a  tax  authority),  provided  the  Disclosing  Party  uses  reasonable  efforts  to 
ensure the Governmental Authority maintains such terms as confidential; [***].

Publication.  Seres shall be entitled to issue scientific publications and make presentations with respect to the Products, and their 
Manufacture without approval by Bacthera, and Seres shall be in control of any publications or scientific presentations regarding the 
Products or their Manufacture (including testing) subject to this Section  14.7, provided that no Confidential Information of Bacthera 
or  its  Affiliates  is  being  shared  in  such  publications  and  presentations  without  Bacthera’s  or  its  Affiliates  prior  written  consent.  
Bacthera shall not issue any scientific publications regarding the Products or their Manufacture (including testing) without Seres’ 
prior written consent, which shall not be unreasonably withheld.

REPRESENTATIONS, WARRANTIES, UNDERTAKINGS AND COVENANTS

By Each Party.  Each Party represents, warrants, undertakes and covenants to the other that: (i) it is duly organized and validly 
existing  under  the  laws  of  the  jurisdiction  of  its  incorporation  and  has  full  corporate  power  and  authority  to  enter  into  this 
Agreement; (ii) it has all necessary power and authority to execute and deliver this Agreement to perform its obligations hereunder 
and  to  consummate  the  transactions  contemplated  hereby;  (iii)  its  execution  and  delivery  of  this  Agreement  have  been  duly  and 
validly  authorized  by  all  necessary  action,  and  no  other  proceedings  on  its  part  are  necessary  to  authorize  this  Agreement  or  to 
consummate  the  transactions  contemplated  hereby;  and  (iv)  this  Agreement  has  been  duly  authorized  and  validly  executed  and 
delivered by it and constitutes a legal, valid and binding obligation on it, enforceable against it in accordance with the terms of this 
Agreement.

25

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

15.2

15.3

15.4

15.5

15.6

16.

16.1

16.2

16.3

By Bacthera (Manufacturing).  Bacthera represents, warrants, undertakes and covenants that: [***].

By Bacthera (Design and Construction Work).  Bacthera represents, warrants, undertakes and covenants that:

(a)

(b)

(c)

(d)

[***]; 

[***];

[***]; and

[***]. 

By Bacthera (Importing). Bacthera represents, warrants, undertakes and covenants that [***].

By Seres.  Seres represents, warrants, undertakes and covenants that: [***].

Disclaimer  of  Warranties.    EXCEPT  AS  SPECIFICALLY  SET  FORTH  IN  THIS  SECTION   15,  NEITHER  PARTY  MAKES 
ANY  REPRESENTATION  OR  WARRANTY,  EXPRESS  OR  IMPLIED,  INCLUDING  ANY  IMPLIED  WARRANTY  OF 
MERCHANTABILITY,  FITNESS  FOR  A  PARTICULAR  PURPOSE  OR  USE,  NON-INFRINGEMENT  AND  ANY  OTHER 
STATUTORY WARRANTY. 

INDEMNIFICATION

Indemnification  by  Seres.    Seres  shall  indemnify,  defend  and  hold  Bacthera  and  its  Affiliates,  and  their  respective  agents, 
employees, officers and directors (the “Bacthera Indemnitees”) harmless from and against [***]; provided, however, that Seres’ 
obligations pursuant to this Section 16.1 will not apply to the extent such claims or suits result from the acts or omissions of any of 
the Bacthera Indemnitees. 

Indemnification  by  Bacthera.    Bacthera  shall  indemnify,  defend  and  hold  Seres  and  its  Affiliates,  and  their  respective  agents, 
employees, officers and directors (the “Seres Indemnitees”) harmless from and against [***]; provided, however, that Bacthera’s 
obligations pursuant to this Section 16.2 will not apply to the extent such claims or suits result from the acts or omissions of any of 
the Seres Indemnitees.

Notification  of  Claim.    A  Party  seeking  indemnification  shall:  (a)  promptly  notify  (“Claim Notice”)  the  indemnifying  Party  as 
soon as it becomes aware of a claim or suit for which indemnification may be sought pursuant hereto (provided that the failure to 
give a Claim Notice promptly shall not prejudice the rights of an indemnified Party except to the extent that the failure to give such 
prompt notice materially adversely affects the ability of the indemnifying Party to defend the claim or suit); (b) cooperate with the 
indemnifying Party in the defense of such claim or suit, at the expense of the indemnifying Party; and (c) if the indemnifying Party 
confirms in writing to the indemnified Party its intention to defend such claim or suit within ten (10) days after receipt of the Claim 
Notice, permit the indemnifying Party to control the defense of such claim or suit, including without limitation the right to select 
defense counsel; provided that if the indemnifying Party fails to (i) provide such confirmation in writing within the ten (10) day 
period; or (ii) diligently 

26

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

and reasonably defend such suit or claim at any time, its right to defend the claim or suit shall terminate immediately upon ten (10) 
days’ written notice to the indemnifying Party and the indemnified Party may assume the defense of such claim or suit [***].  In no 
event, however, may the indemnifying Party [***].  Seres shall promptly notify Bacthera in writing if it receives or is notified of a 
formal written claim from a third party that Seres Information and/or Seres Intellectual Property or that the use by Bacthera thereof 
for  the  provision  of  the  Manufacturing  process  infringes,  misappropriates  or  violates  (as  the  case  may  be)  any  proprietary  or 
Intellectual Property or other rights of any third party.

17.

DISPUTE RESOLUTION

Any dispute between the Parties arising out of or relating to this Agreement, including with respect to the interpretation of any provision of 
this Agreement and with respect to the performance by a Party, shall be finally settled as provided in this Section  17. 

17.1

Informal Dispute Resolution.

(a)

Any claim or dispute between the Parties arising out of or relating to this Agreement shall be resolved as follows:

(i)

(ii)

(iii)

First by the JSC; then

If  the  JSC  cannot  resolve  the  claim  or  dispute  within  [***],  either  Party  may  escalate  the  matter  to  the  Chief 
Executive Officers of each Party; then

If  the  Chief  Executive  Officers  cannot  resolve  the  claim  or  dispute  within  [***],  either  Party  may  escalate  the 
matter to their respective boards of directors.

(b)

(c)

If a claim or dispute is not resolved within [***] days after the matter has been provided to the board members using the 
procedures set out in Section  17.1(a), and if either Party so chooses, the claim or dispute shall be finally settled as set out 
in Section  17.2.

This  Section   17.1  shall  not  preclude  either  Party  from  obtaining  equitable  relief  on  an  urgent  basis  from  a  court  of 
competent jurisdiction or from avoiding the lapse of a contractual or statutory limitations period pending the decision of 
the arbitrator.

17.2

Formal Dispute Resolution. 

(a)

Each Party hereto agrees to submit to the exclusive jurisdiction of the [***] for any dispute of whatsoever nature which 
arises  out  of  or  in  connection  with  this  Agreement,  including  any  dispute  as  to  the  validity,  existence,  enforceability, 
interpretation,  application,  implementation,  breach,  termination  or  cancellation  of  this  Agreement  or  as  to  the  Parties’ 
rights and/or obligations in terms of this Agreement or in connection with any documents furnished by the Parties in terms 
of this Agreement, which are not resolved in the manner referred to in Section  17.1 (each, a “Proceeding”).  Each Party 
further  agrees  (a)  to  commence  any  Proceeding  arising  out  of  or  relating  to  this  Agreement  or  the  transactions 
contemplated  by  this  Agreement  only  in  the  Specified  Courts;  (b)  to  waive  any  objection  to  the  laying  of  venue  of  any 
Proceeding arising out of or relating to this 

27

 
 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

Agreement or the transactions contemplated hereby in the Specified Courts; and (c) to waive and not to plead or claim that 
any  such  Proceeding  brought  in  any  of  the  Specified  Courts  has  been  brought  in  an  inconvenient  forum;  provided, 
however, that such submission to the jurisdiction of the Specified Courts is solely for the purpose referred to herein and 
shall not be deemed to be a general submission to the jurisdiction of such courts or any other courts other than for such 
purpose. 

17.3

17.4

18.

18.1

[***]. [***].

Obligation to Perform.  Subject to each Party’s termination rights hereunder and Seres’ right to withhold disputed amounts, each 
Party shall continue to perform its obligations under this Agreement during a dispute.

TERM AND TERMINATION

Term. The initial term of this Agreement commences on the Effective Date and continues until the 10th anniversary of the earlier of 
the  (a)  CQV  Completion  or  (b)  commencement  of  Manufacturing,  unless  earlier  terminated  in  accordance  with  this  Section  or 
extended  for  a  Termination  Assistance  Period  (the  “Initial  Term”,  and,  together  with  the  Initial  Renewal  Term  and  Additional 
Renewal Term(s), the “Term”).  Thereafter, Seres may extend the Term for an additional three-year period (the “Initial Renewal 
Term”).  After  the  Initial  Renewal  Period,  the  Term  shall  automatically  extend  for  additional  three-year  periods  (each,  an 
“Additional Renewal Term”) on the terms and conditions then in effect, unless either (i) Seres provides notice two (2) years before 
the end of the Term of its intent not to renew or (ii) Bacthera, at least thirty-six (36) months prior to the end of the Initial Renewal 
Term or the applicable Additional Renewal Term, notifies Seres of Bacthera’s intention to terminate the Agreement, in which case, 
this Agreement will terminate at the end of the then-current Term. No termination charges other than the charges in Section 18 shall 
be applicable to any termination or the expiration of the Initial Term, the Initial Renewal Term or any Additional Renewal Term. 

18.2

Termination for Cause.

(a)

Upon written notice to Bacthera, Seres may terminate this Agreement in its entirety or with respect to a Product if: 

(i)

(ii)

(iii)

(iv)

(v)

(vi)

[***];

[***];

[***];

[***];

[***]; or

[***].

28

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

(b)

Upon  written  notice  to  Seres,  Bacthera  may  terminate  this  Agreement  immediately  in  its  entirety  or  with  respect  to  a 
Product if:

(i)

(ii)

(iii)

(iv)

 [***];

[***].

[***].

Seres [***]. 

18.3

18.4

Termination for Convenience.  Seres may terminate this Agreement in whole or in part for convenience upon [***].

Consequences  of  Termination  or  Expiration.    Any  termination  or  expiration  of  this  Agreement  shall  be  accomplished  without 
penalty  and  shall  not  relieve  or  release  either  Party  from  any  rights,  liabilities  or  obligations  that  may  have  accrued  under 
Applicable  Law  or  this  Agreement.  In  the  event  of  any  such  termination  or  expiration,  the  requirements  set  forth  in  this  Section 
shall apply.

(a)

(b)

(c)

(d)

(e)

(f)

If the Agreement is terminated prior to the applicable Term, Seres shall pay the applicable Charges for the Purchase Orders 
[***] as of the last day of the Term to the extent Manufactured and delivered in accordance with Applicable Law and this 
Agreement. To the extent payable under Exhibit 4, Seres shall pay the Cancellation Fee for all Purchase Orders and the 
respective Batches that cannot be irrevocably cancelled.  [***].

In  the  case  of  a  termination,  in  addition  to  all  other  amounts  payable  under  this  Section  18.4,  Seres  shall  reimburse 
Bacthera  for  all  documented  and  reasonable  out-of-pocket  costs  to  which  Bacthera  has  irrevocably  committed  as  of  the 
effective date of termination [***].

Within  [***]  days  after  the  effective  date  of  termination  or  expiration,  Bacthera  shall  deliver  to  Seres  or  destroy,  as 
directed  by  Seres,  all  unused  Materials  ordered  and  paid  for  by  Seres  that  are  not  required  by  Bacthera  to  meet  its 
obligations under this Agreement. [***].  

Seres  shall  reimburse  Bacthera  for  all  unrecovered  capital  expenses  incurred  by  Bacthera  in  support  of  Seres,  including 
fixtures in the Facility that are required solely for the Manufacture of the Products hereunder [***]. 

Upon termination or expiration of this Agreement, Bacthera will make all equipment (other than fixtures) in the Facility 
available to Seres for removal and shall reasonably cooperate with Seres’ efforts to de-install, package, remove and ship 
such equipment at Seres’ expense.

Seres  shall  pay  all  third-party  costs  reasonably  required  for  decommissioning  and  decontamination  of  the  Facility  in 
accordance with Applicable Law.  Bacthera shall use Commercially Reasonable Efforts to support the decommissioning 
and decontamination activities so that they are completed as quickly as practicable.

29

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

(g)

(h)

(i)

If  there  is  a  termination  of  the  Agreement  prior  to  the  expiration  of  the  Initial  Term,  Seres  shall  continue  to  pay  the 
applicable  Suite  Fee  under  Exhibit 4  during  the  Ramp-Down  Period  [***].    The  “Ramp-Down  Period”  shall  be  [***] 
months in the case of a termination by Seres under Section 18.2(a)(v) or 18.3, and for any other termination by Seres, the 
earlier of (i) the date on which Bacthera notifies Seres that it has vacated the Facility and completed decontamination or 
decommissioning or (ii) [***] after such a termination. 

Seres  can  only  place  Purchase  Orders  with  a  Delivery  Date  prior  to  the  effective  date  of  expiration  of  the  Term.  If  the 
Agreement is terminated by Seres, Seres can only place Purchase Orders with a Delivery Date that is earlier than [***] 
prior to the end of the Ramp-Down Period. Bacthera will fill all Purchase Orders placed in accordance with this Section 
18.4(h).

On the effective date of termination or expiration, the applicable rights granted to either Party in Section 14 shall terminate 
and  eitherParty  shall  (i)  deliver  to  the  other  Party  a  current  copy  of  that  other  Party’s  Intellectual  Property  and  other 
Confidential Information in the form in use as of such date; and (ii) destroy or erase all other copies of the other Party’s 
Intellectual  Property  and  Confidential  Information  in  the  possession  of  the  other  Party  or  its  agents.    Either  Party  shall, 
upon the other Party’s request, certify in writing to the other Party, in a form acceptable to that other Party and executed by 
an authorized officer of the Party, that all such copies have been destroyed or erased.

(j)

The  Parties  shall  reasonably  cooperate  to  document  a  copy  of  all  the  Bacthera  Intellectual  Property  necessary  for  the 
Manufacture of the Products, in the form in use as of the date of termination or expiration of this Agreement.

18.5

Termination Assistance. If this Agreement terminates or expires, in whole or in part, for any reason, Seres may require Bacthera, 
during the Termination Assistance Period, to: 

(a)

(b)

(c)

[***];

provide  complete  and  correct  information  regarding  the  Manufacture  of  the  Products  reasonably  requested  by  Seres  or 
another  supplier  designated  by  Seres  and  making  Bacthera  Personnel  who  are  knowledgeable  about  the  Manufacturing 
process thereof reasonably available to Seres or such supplier upon Seres’ reasonable request, in each case to the extent 
required to enable Seres or its designated supplier who are assuming responsibility for the Manufacture of the Products to 
do so; and

perform any other activities reasonably requested by Seres to transfer the Manufacture of the Products to Seres or another 
supplier (the activities in clauses (a) through (c) in this Section 18.5, the “Termination Assistance Activities”). 

During a Termination Assistance Period, the Termination Assistance Activities shall be of the same quality, level of performance 
and  scope  as  provided  prior  to  termination,  but  not  less  than  as  required  under  the  Agreement.    Bacthera  shall  invoice  the 
Termination Assistance Activities at the rates set forth in Section 4.3 of Exhibit 4 (“Termination Assistance Charges”).

30

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

18.6

 [***].

(a)

(b)

(c)

(d)

[***].

[***].

[***].

[***].

18.7

Survival.  Sections [***] shall survive the expiration or termination of this Agreement. 

19.

19.1

INSURANCE 

The  Parties  acknowledge  that  at  the  time  of  signing  this  Agreement  they  are  not  yet  in  a  position  to  reach  an  agreement  on  the 
subject of insurance due to the fact that the Parties are currently reviewing their respective insurance policies.  Therefore, they agree 
to reach an agreement in good faith at the appropriate time.

19.2

Bacthera or its Affiliates shall provide the following insurance coverage [***]. 

(a)

(b)

[***];

[***].

19.3

19.4

19.5

20.

20.1

[***], each Party shall obtain and thereafter provide for appropriate property insurance coverage in respect of [***]. 

The foregoing insurance coverage shall be primary and non-contributing with respect to any other insurance or self-insurance that 
may be maintained by the other Party and its Affiliates. [***]. The Party required to maintain such insurance shall cause its insurers 
to  issue  a  certificate  of  insurance  from  the  applicable  insurer  that  evidences  that  the  coverage  and  policy  endorsements  required 
under this Agreement are maintained in force. The insurers selected by Bacthera shall have an [***] rating of [***].

In the event that any of the required policies of insurance are written on a claims-made basis, then such policies shall be maintained 
during the entire Term and for a period of not less than [***] years following the termination or expiration of the Term. During the 
Term and such [***] year period, the Party required to maintain insurance shall use Commercially Reasonable Efforts not to permit 
any insurance set forth in Section 19.2 or Section  19.3 to be reduced, expired or cancelled without the prior written consent of the 
other Party.

MISCELLANEOUS

Independent Contractors. This Agreement does not create a joint venture, partnership, employment relationship or other agency 
relationship  between  the  Parties  or  their  Affiliates.    Neither  Party  shall  be  obligated  with  respect  to  any  transaction,  and  no 
obligation or rights or liabilities of any kind whatsoever are created (or shall be deemed to be created) as a result of this 

31

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

Agreement or any other written or oral statement or any further actions by the Parties, except in the case of this Agreement for the 
provisions expressly contained herein.

Assignment.  [***].

Third-Party Beneficiaries.  The Agreement is for the sole benefit of the Parties and their permitted assigns and each such Party 
intends that the Agreement shall not benefit, or create a right or cause of action in or on behalf of, any Person or entity other than 
the Parties, their permitted assigns, and with respect to Section  16, the Seres Indemnitees and Bacthera Indemnitees.

Further Actions.  Each Party agrees to execute, acknowledge and deliver such further instruments and to do all such other acts as 
may be necessary or appropriate in order to carry out the express provisions of this Agreement.

20.2

20.3

20.4

20.5

Force Majeure. 

(a)

(b)

(c)

(d)

Neither Party shall be liable to the other Party for failure or delay in the performance of any of its obligations under this 
Agreement (except for payment of any amounts due under this Agreement) for the time and to the extent such failure or 
delay is caused by earthquake, riot, civil commotion, the adoption, application or enactment of any legal measure or order 
from  any  Governmental  Authority  enacted  or  issued  after  the  date  hereof  arising  out  of  or  in  connection  with  the 
coronavirus disease known as SARS-CoV-2 (“COVID-19”); or other act of government or state, epidemic, pandemic, war, 
terrorist acts, flood, fire, insurrection, embargo, prevention from or hindrance in obtaining energy or other utilities, a global 
supply  shortage  of  one  or  more  of  the  Facility  Materials,  Materials  or  necessary  components  for  which  there  is  not  a 
reasonable substitute, or other event that is both beyond the reasonable control of the respective Party and could not be 
avoided through reasonable precautions (“Force Majeure Event”). 

The  Parties  acknowledge  that  COVID-19  is  currently  causing  global  disruption,  and  Bacthera’s  performance  under  this 
Agreement  may  be  affected  by  consequences  of  COVID-19,  including  but  not  limited  to  any  measures  taken  by 
authorities, and/or the availability of human resources and raw materials, and that any such event may be deemed a Force 
Majeure Event.

Notwithstanding  the  foregoing,  (a)  any  Applicable  Law  in  Switzerland,  which  is  in  effect  immediately  prior  to  the 
Effective Date (“Relevant COVID-19 Law(s)”) shall not constitute a force majeure; (b) a Party shall not be entitled to an 
extension of time in the performance of any of its obligations in respect of any Relevant COVID-19 Law; (c) the effects of 
any  Relevant  COVID-19  Law  shall  be  deemed  not  to  prevent  the  performance  by  a  Party  of  its  obligations  under  this 
Agreement; and (d) Relevant COVID-19 Laws are a risk borne by the obligor. 

The  Party  affected  by  such  Force  Majeure  Event  will  provide  the  other  Party  with  full  particulars  thereof  as  soon  as  it 
becomes  aware  of  the  same  (including  its  best  estimate  of  the  likely  extent  and  duration  of  the  interference  with  its 
activities), and will use Commercially Reasonable Efforts to overcome the difficulties created thereby and to 

32

 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

resume performance of its obligations as soon as practicable.  If there is a Force Majeure Event, the Party affected by the 
Force  Majeure  Event  is  excused  from  any  default  or  delay  for  as  long  as  and  to  the  extent  that:  (i)  such  circumstances 
prevail; (ii) the affected Party is not at fault in causing the Force Majeure Event and could not have avoided the default or 
delay through the use of reasonable precautions; and (iii) the affected Party continues to use its Commercially Reasonable 
Efforts to recommence performance. 

(e)

If  the  performance  by  Bacthera  of  any  obligation  under  this  Agreement  is  delayed  owing  to  a  force  majeure  for  any 
continuous period of more than [***] days (or such longer period as may be agreed by the JSC), [***]. 

20.6

Entire  Agreement  of  the  Parties;  Amendments;  Waiver;  Exhibits.    This  Agreement  constitutes  and  contains  the  entire 
understanding and agreement of the Parties respecting the subject matter hereof and cancels and supersedes any and all prior and 
contemporaneous negotiations, correspondence, understandings and agreements, other than the Confidential Disclosure Agreement 
and the LOI between the Parties, whether oral or written, regarding such subject matter.  No waiver, modification or amendment of 
any other provision of this Agreement will be valid or effective unless made in writing and signed by both Parties. A waiver by 
either Party of any of the terms and conditions of this Agreement in any instance will not be deemed or construed to be a waiver of 
such term or condition for the future, or of any subsequent breach hereof. The following Exhibits attached hereto are incorporated 
by reference:

EXHIBIT

TITLE

1

2

3

4

5

6

7

8

9

Design and Construction Work

Product Specifications

Seres Supplied Materials

Charges

Key Personnel

Direct FTE

Materials Acquired on Behalf of Seres

DRAFT Technology Transfer 

Approved Subcontractors

20.7

Captions. The captions to this Agreement are for convenience only and are to be of no force or effect in construing or interpreting 
any of the provisions of this Agreement.

33

 
 
 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

20.8

20.9

Governing Law. This Agreement shall be governed by, and construed and interpreted, in accordance with the internal laws of [***] 
without giving effect to any choice of law rule that would cause the application of the laws of any jurisdiction.  It is hereby agreed 
that the United Nations’ Convention on Contracts for the International Sale of Goods shall have no application to this Agreement 
and it is hereby specifically excluded. 

Notices and Deliveries. Any notice, request, delivery, approval or consent required or permitted to be given under this Agreement 
will be in writing and will be deemed to have been sufficiently given if delivered in person, transmitted by email (receipt verified) 
or by express courier service (signature required) or five (5) days after it was sent by registered letter, return receipt requested (or its 
equivalent), provided that no postal strike or other disruption is then in effect or comes into effect within two (2) days after such 
mailing, to the Party to which it is directed at its address or email address shown below or such other address or email address as 
such Party will have last given by notice to the other Parties. 

If to Seres, addressed to:

Seres Therapeutics, Inc.
200 Sydney Street
Cambridge, MA 02139, USA
Attention: [***]

If to Bacthera, addressed to:

Bacthera AG
Hochbergerstrasse 60A
4057 Basel, Switzerland
Attention: [***]

20.10

No Consequential Damages. IN NO EVENT WILL ANY PARTY OR ANY OF ITS RESPECTIVE AFFILIATES BE LIABLE 
TO  THE  OTHER  PARTY  OR  ANY  OF  ITS  AFFILIATES  FOR  SPECIAL,  INDIRECT,  CONSEQUENTIAL  OR  PUNITIVE 
DAMAGES,  WHETHER  IN  CONTRACT,  WARRANTY,  TORT,  NEGLIGENCE,  STRICT  LIABILITY  OR  OTHERWISE, 
INCLUDING BUT NOT LIMITED TO, LOSS OF PROFITS OR REVENUE [***].

20.11

Limitation of Liability. [***].

20.12

20.13

Cumulative  Remedies.  All  rights,  remedies,  undertakings,  obligations  and  agreements  contained  in  this  Agreement  will  be 
cumulative and none of them will be in limitation of any other remedy, right, undertaking, obligation or agreement of either Party.

Severability. When possible, each provision of this Agreement will be interpreted in such manner as to be effective and valid under 
Applicable Law, but if any provision of this Agreement is held to be prohibited by or invalid under Applicable Law, such provision 
will be ineffective only to the extent of such prohibition or invalidity, without invalidating the remainder of this Agreement. The 

34

 
 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

Parties  will  make  a  good  faith  effort  to  replace  the  invalid  or  unenforceable  provision  with  a  valid  one  so  long  as  the  essential 
benefits of this Agreement remain enforceable and obtainable.

20.14

Counterparts. This Agreement may be executed simultaneously in any number of counterparts, any one of which need not contain 
the signature of more than one Party but all such counterparts taken together will constitute one and the same agreement.

[Signature page follows]

35

 
 
[***] Certain information in this document has been excluded pursuant to Regulation S-K, Item (601)(b)(10). Such excluded information is 
both (i) not material and (ii) the type that the Registrant treats as private or confidential.

IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed by their respective duly authorized officers as of the Effective 
Date, each copy of which will for all purposes be deemed to be an original.

SIGNED BY:
FOR AND ON BEHALF OF
SERES THERAPEUTICS, INC.

_/S/ ERIC D. SHAFF________________________
NAME ERIC D. SHAFF
TITLE PRESIDENT, CEO
DATE 08 NOVEMBER 2021 

SIGNED BY:
For and on behalf of
BacThera AG

SIGNED BY:
For and on behalf of
BacThera AG

_/s/ [***]____________________
Name [***]
Title [***]
Date 07 November 2021 / 11:25 CET

__/s/ [***]
Name [***]
Title [***]
Date 07 November 2021 / 12:27 CET

36

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1.  DEFINITIONS

EXHIBIT 1

DESIGN AND CONSTRUCTION WORK

The  following  terms  when  capitalized  in  this  Exhibit  (including  the  Attachments)  shall  have  the  following  meanings  unless 
otherwise expressly provided or dictated by the context.  All capitalized terms used but not defined herein shall have the meanings 
set forth in the Agreement.

“Approval Matrix” means agreed delegation of approval(s) table required for the different types of Work documentation, as may 
be modified or amended from time to time by mutual agreement of the Parties.

“CQV Completion” means the date upon which the following criteria have been met: Successful IQ/OQ completion and system 
acceptance.

“Design  Documents”  means  the  drawings,  documentation  and  specifications  in  respect  of  the  Work  either  (a)  described  in  or 
attached  to  this  Exhibit  as  Attachment  A,  or  (b)  prepared  by  Bacthera,  its  Affiliates  or  any  subcontractor  and  submitted  to,  and 
approved by, Seres for use under this Agreement.

“Environmental Law” shall mean any Applicable Law relating in any way to the environment, and the protection, preservation or 
reclamation of natural resources (including without limitation any surface water, groundwater, land surface, subsurface strata, river 
sediment, plant or animal life, air and soil), to the release or threatened release of any Hazardous Substance, including investigation, 
monitoring, clean up, removal, treatment or any other action to address such release or threatened release, or to health and safety 
matters.

“Project Quality Management System (pQMS)” means Bacthera and its Affiliates’ formalized system that documents processes, 
procedures, and responsibilities for achieving quality design, construction and commissioning activities. 

“Hazardous Substance” means any waste, substance, product, pollutant or material, whether solid, liquid or gaseous, that (i) is or 
contains, oil, petroleum or any fraction thereof, (ii) requires removal, remediation or reporting under any environmental law, or is 
defined, listed or identified as a “contaminant”, “pollutant”, “toxic substance”, “toxic material”, “hazardous waste” or “hazardous 
substance”  or  words  of  similar  meaning  and  regulatory  effect  thereunder  or  (iii)  is  toxic,  corrosive,  flammable,  infectious,  , 
carcinogenic, mutagenic or otherwise hazardous and is regulated as such by any governmental authority under any environmental 
law in Switzerland

“Project Execution Plan” means the governing document that establishes the means to execute, monitor, and control of the Work. 

“Permits” mean any authorization, consent, approval, license, lease, ruling, permit, exemption, filing, variance, order, judgment, 
decree, publication, notice to, declaration of or with or regulation by or of any Governmental Authorities relating to the acquisition, 
ownership, occupation, construction, performance of the Work, start‑up, testing, operation, maintenance or warranty of any part of 
the Facility. It is understood that any permit concerning the GMP 

 
 
manufacturing/establishment  licenses  and  the  respective  GMP  certificate  by  any  Regulatory  Authority  is  excluded  from  this 
definition and is not in scope of this Exhibit 1.

“Project”  means  the  construction  of  the  Facility,  the  Facility  site  and  all  other  appliances,  parts,  instruments,  appurtenances, 
accessories and other property that may be incorporated or installed in or otherwise become part of any of the foregoing at any stage 
of development, construction or operation.

“Project Manager” means the responsible person for implementing the Seres Facility. 

“System Acceptance”  means  the  successful  completion  of  a  process  for  approval  and  release  of  GMP  systems  after  successful 
completion of commissioning and qualification activities. Documentation requirements includes an overview of the results of the 
qualification, a review of all discrepancies and deviations generated as part of the qualification, including the resolution method, a 
clear  statement  as  to  whether  the  GMP  system  is  fit  for  purpose,  approval  of  effective  operating  procedures,  maintenance,  and 
calibration programs, and receipt of engineering turnover documentation.

“Work” means Design and Construction Work (as defined in the Agreement). 

“Work  Scope”  shall  mean  all  requirements  for  the  Work,  set  forth  in  this  Agreement  the  Design  Documents.2. GENERAL

OBLIGATIONS OF THE PARTIES

2.1  Without limiting the generality of Seres other obligations under this Exhibit, Seres’ obligations are to:

(a)  Provide all relevant documentation reasonably required by Bacthera regarding the Product and the Manufacturing process for 

the Product, to the extent relevant to the construction, fit-out and qualification of the Facility; and

(b)  Provide  the  Seres  approved  and  effective  URS  (User  Requirement  Specification)  for  all  process  equipment,  single  use  
equipment and QC equipment relevant for performing production of the Product. The URS shall be substantially consistent 
with the information provided to Bacthera prior to the Effective Date. Bacthera shall review and approve such URS. 

2.2  Without limiting the generality of Bacthera’s other obligations under this Exhibit, Bacthera’s obligations are to:

(a)  Furnish  the  Facility  and  any  other  area  relevant  for  the  Manufacture  of  the  Product(s)  free  and  clear  of  all  Hazardous  
Substances  according  to  Swiss  Law  existing  above  the  ground  and  in  the  soil  and  assure  that  there  shall  be  no  legal 
encumbrances  on  the  Facility  and  any  other  area  relevant  for  the  Manufacture  of  the  Product(s)  that  will  impede  the 
ingress and egress of Bacthera and its subcontractors thereto and therefrom as necessary to allow the performance of the 
Work;

(b)  Obtain all necessary Permits, licenses and other authorizations relating to the Work, (e.g. piling permit, building permit, waste 

water permit, environmental permit); 

 
 
 
(c)  On  or  before  the  commencement  of  construction  of  the  CoE,  acquire  real  property  rights  necessary  for  performance  of  the  
Work (e.g. rights for power lines, gas lines, water lines, waste lines, sewer lines, for any area relevant for the Manufacture 
of the Product(s));

(d)  Perform  the  Work  in  accordance  with  the  Work  Scope  and  as  otherwise  provided  in  this  Agreement.    Without  limiting  the  
generality of the foregoing, Bacthera shall perform the Work in accordance with, and so that the Facility and any other area 
relevant for the Manufacture of the Product(s) meets all the requirements of, Applicable Law, Permits, Prudent Industry 
Practices, and the Product Specifications;

(e)  Prepare and keep up to date a complete set of “as built” records of the execution of the Work, showing the “as built” locations, 
sizes  and  details  of  the  Work  as  executed,  with  cross-references  to  relevant  specifications,  data  sheets,  change  orders 
(“Change  Orders”)  and  amendments.    Such  records  shall  be  kept  on  the  CoE  site  and  shall  be  made  available  for 
inspection by Seres, its agents and designees upon request;

(f) 

In accordance with the Approval Matrix, cooperate with Seres and its agents and assignees in connection with the review of 
any Facility Materials or Design Documents, any inspections and performance tests, and in any other matters relating to 
the Work;

(g)  Ensure  all  Facility  Materials  and  equipment  provided  by  Affiliates  and  subcontractors  for  use  in  the  Facility  are  new  and  

unused;

(h)  Arrange for the handling of all Facility Materials and storage and maintenance of such Facility Materials; and

(i)  Comply with all reasonable Seres instructions, subject to Bacthera’s agreement and Bacthera’s right (if applicable) to issue a 

Change Order under Section 12.2.

3.  GENERAL PROVISIONS.

3.1  General Oversight.  As soon as reasonably practicable, Seres may maintain a staff at the construction site to perform the activities set 
forth in Section 2.1 hereof. During the period that Work is to be performed under this Exhibit 1, Bacthera shall provide reasonable 
facilities [***], including field office space at the construction site, to accommodate the Seres staff.

3.2  Seres Not Responsible for Acts of Bacthera. No inspection of the Work or the Design Documents, or failure to inspect the same, by 
Seres  or  any  of  its  agents  or  designees  shall  be  a  waiver  of  Bacthera’s  obligations  hereunder,  or  be  construed  as  approval  or 
acceptance of the Work or any part thereof. Notwithstanding the foregoing, if Seres detects any error or failure in any part of the 
Work, it shall inform Bacthera in order to mitigate any damage arising from such failure. 

3.3  Time for Seres Review of Design Documents.    In  accordance  with  the  Approval  Matrix,  Seres  shall  use  Commercially  Reasonable 
Efforts  to  inspect,  review  and/or  approve  Design  Documents  as  soon  as  reasonably  practicable  (but  in  no  event  later  than  [***] 
Business  Days  or  such  other  period  of  time  that  is  reasonable  under  the  circumstances  and  agreed  by  Seres  and  Bacthera)  after 
receipt of such Design Documents by Seres.  

 
 
4.  FACILITY 

4.1  Bacthera  will  design,  supply,  construct,  commission,  and  test  the  Facility  and  any  other  area  relevant  for  the  Manufacture  of  the  

Product(s) according to and in compliance with:

(a)  cGMP requirements (FDA, EMA and Swissmedic); and 

(b)  Applicable Laws.

5.  DESIGN DOCUMENTS; PROJECT/EXECUTION PLAN.

5.1  Initial  Design  Document.    The  Parties  have  agreed  on  the  conept  report  attached  hereto  as  Attachment A  for  the  Facility  (“Initial 
Design Document”).  Bacthera, its Affiliates or subcontractors shall update the Initial Design Document and Bacthera shall submit 
the final Initial Design Documents to Seres for its approval on or before [***]. 

5.2  Key Deliverables.  Bacthera will use Commercially Reasonable Efforts to provide the following draft reports as deliverables as part of 

the Work on or before the date specified below, for Seres review and approval in accordance with the Approval Matrix.

“KEY DELIVERABLE”

Concept Report

Basis of Design

Detailed Schedule

Project Execution Plan

Validation Master Plan

Detailed Design (IFC P&IDs)

DATE

[***]

[***]

[***]

[***]

[***]

[***]

5.3  Key  Milestones.    Bacthera  will  use  Commercially  Reasonable  Efforts  to  achieve  the  following  milestones  on  or  before  the  date 

specified below  

 
 
 
 
 
 
 
 
“KEY MILESTONE”

Issue of final building permit

Start of building construction

Building weatherproof

Mechanical completion

Substantial completion

CQV Completion

DATE

[***]

[***]

[***]

[***]

[***]

[***]

5.4  Storage. Bacthera will provide at least the following storage for Seres for storage of the SRM, Raw Materials and Product: 

(a)  SRM:  storage at [***] at a capacity of [***] 

(b)  Consumables and Raw Materials:  [***] equal to [***]. 

(c)  Product: [***] equal to [***].

6.  SCHEDULES/PROGRESS REPORTS.

6.1  General.  Within [***] days after the Effective Date, Bacthera, its Affiliates and/or subcontractors will provide a Project Execution Plan 

identifying the tasks to be performed by each Party in connection with the Project. 

6.2  Detailed Schedule. A detailed schedule (the “Detailed Schedule”) shall be developed and maintained by Bacthera its Affiliates and/or 
subcontractors and revised and updated not less than monthly or as otherwise agreed by the Parties. The Detailed Schedule shall 
include  all  applicable  milestones  with  respect  to  the  construction,  completion  and  commissioning  of  the  Facility.    The  Detailed 
Schedule shall incorporate and be consistent with the milestones and milestone dates above. The Key Deliverables shall be achieved 
per the dates provided in Section 5.2 and the Key Milestones shall be achieved per the dates provided in Section 5.3. Bacthera shall 
cooperate  with  Seres  in  coordinating  the  execution  of  the  Detailed  Schedule.  Bacthera  its  Affiliates  and/or  subcontractors  shall 
incorporate  all  reasonable  changes  to  the  Detailed  Schedule  from  Seres,  after  approval  from  JSC.  Bacthera,  its  Affiliates  and/or 
subcontractors will resubmit the Detailed Schedule for Seres’s review within [***] days of receipt of such comments from Seres. 

6.3  CQV Completion.  CQV Completion is planned for [***]. The CQV Completion may be adjusted after the Detailed Design by mutual 

agreement of Seres and Bacthera, the Parties acting in good faith and not unreasonably withholding such agreement. 

6.4  Progress Reports.  Monthly progress reports (each a “Progress Report”) shall be prepared by Bacthera and submitted to Seres. Such 
Progress Reports shall be reviewed against Key Performance Indicators (“KPIs”), that are to be determined and provided by the 
[***] within [***] 

 
 
 
days  after  the  Effective  Date.    Bacthera  shall  provide  the  first  draft  of  the  Progress  Report    [***]  after  the  Effective  Date.  The 
Progress Report will be in a Power Point format.  

6.5  Risk Register. Bacthera will provide access to a digitally stored risk register, with the first draft being provided by [***]. 

7.  TESTING.

7.1  Factory Tests.  As customary or otherwise required by the Work Scope or by Prudent Industry Practices, one or more factory tests of 
relevant Facility Materials and equipment reasonably identified by Bacthera and approved by Seres shall be performed by Bacthera.  
For Seres owned process equipment, a test memo shall be issued by Bacthera to Seres in advance of the conduct of each factory test.  
Such memo shall describe the test to be performed, the applicable item of Facility Material or equipment being tested, the standards 
and method of testing, and the testing facility’s capabilities and shall state a proposed test date (each a “Factory Acceptance Tests” 
or “FAT”).  If Seres or its agent attends such test, Bacthera shall provide the results of such required tests to Seres and its agent 
within  [***]  days  of  the  completion  of  each  such  test.    If  Seres  and  its  agent  do  not  attend  such  test,  whether  the  test  has  been 
successfully completed shall be determined from Bacthera’s test certificates to be provided by Bacthera to Seres and its agent within 
[***]  days  of  the  test  completion  date.    Successful  completion  of  the  applicable  FAT  shall  be  a  precondition  to  shipment  to  the 
Facility for installation of the tested item of Facility Material or equipment as mutually determined by Bacthera and Seres.  

7.2  Performance Tests

(a)  “ Performance  Tests”  will  include  calibrations,  commissioning,  site  acceptance  testing,  installation  qualification,  and/or 
operational  qualification,  and/or  performance  qualification  as  required  by  each  piece  of  equipment  and  testing 
requirements agreed by Bacthera and Seres.

(b)  Bacthera shall submit Performance Test procedures to Seres in sufficient time to allow Seres’ review and final approval of the 
equipment  in  the  table  below,  including  commencement  of  the  applicable  Performance  Tests.    Performance  Tests  of  all 
equipment other than the equipment listed below shall be performed by Bacthera without prior approval by Seres. Unless 
Seres otherwise consents in writing, Bacthera must complete all applicable FAT of Facility Material and equipment, and 
remedy all defects or deficiencies which have been identified by such applicable FAT or otherwise, before commencing 
any applicable Performance Tests.  Notwithstanding any other provision of this Agreement, at least [***] days prior to the 
commencement of any applicable Performance Tests, Bacthera shall have delivered draft as-built drawings of the Facility 
to Seres.  

DRUG SUBSTANCE EQUIPMENT

DRUG PRODUCT EQUIPMENT

[***]

[***]

(c)  Bacthera  shall  perform  the  Performance  Tests  and  any  reruns  thereof  in  accordance  with  the  applicable  Performance  Test  

procedures.  Bacthera shall provide the services 

 
 
 
necessary at the Facility site for the installation, commissioning, start-up and check-out of the Facility and the running or 
rerunning of the Performance Tests.  Bacthera shall provide notice to Seres [***] prior to the date that Bacthera expects the 
Work  to  be  ready  for  the  Performance  Tests,  together  with  a  proposed  schedule  for  such  Performance  Tests  and  the 
instruments to be used during the Performance Tests.  The applicable Performance Tests shall be run as soon as practicable 
after installation at the CoE and/or Facility.

7.3  Correction of Performance Defects or Deficiencies.  At any time during and promptly after completion (whether or not successful) of 
the applicable Performance Tests (or any rerun of such tests), Bacthera shall advise Seres in writing of any defects or deficiencies 
that were discovered or that occurred during the applicable Performance Tests.  Bacthera shall as soon as reasonably practicably 
commence  and  complete  corrective  measures  to  remedy  such  defects  or  deficiencies  at  [***].    All  portions  of  the  Work  which 
contain  defects  or  deficiencies  not  so  corrected  shall  be  removed  from  the  Facility  site  if  necessary  at  [***].    Both  Parties  shall 
decide in their reasonable judgment if the defects or deficiencies discovered during the applicable Performance Tests will require a 
re-run of such Performance Tests. [***] of any Performance Test re-run, uncovering, recovering, correcting and removing Work that 
contains defects or deficiencies, as well as all costs of modifying, removing, disassembling, uncovering, rebuilding, re-engineering, 
replacing,  repairing  or  covering  or  otherwise  handling  all  other  Work  affected  by  such  defects  or  deficiencies  or  the  correction 
thereof;  provided,  however,  [***].  If  Bacthera  fails  to  initiate  correction  of  Work  having  defects  or  deficiencies  as  soon  as 
reasonably practicable (and in any event within twenty (20) Business Days or other time period agreed by the Parties), Seres may 
support  the  correction  at  [***],  if  the  defect  or  deficiencies  were  caused  by  [***].  If,  within  [***]  days  of  notice  from  Seres, 
Bacthera does not remove Work or initiate removal thereof, which has defects or deficiencies, Seres may after [***] after written 
notice to Bacthera, remove, store, sell or dispose of such defective Work, all at the expense of Bacthera, except to the extent such 
defect  or  deficiencies  were  caused  by  Seres.  Bacthera  shall  promptly  provide  notice  to  Seres  in  writing  that  such  corrective 
measures  have  been  completed  and  shall  specify  in  such  notice  the  date  on  which  the  Facility  will  be  ready  for  the  applicable 
Performance Tests to be rerun.  

8.  COMPLETION.

8.1  Substantial Completion.

(a)  Upon successful completion of conditions to Substantial Completion set forth in this Section 8.1 (“Substantial Completion”), 
Bacthera shall give Seres notice that Substantial Completion has occurred. Such Notice shall include a request by Bacthera 
that Seres issue the Substantial Completion Report in accordance with this Section 8.1.  Substantial Completion shall only 
occur when the following conditions have been satisfied:

(i)  Bacthera  has  performed  its  obligations  under  this  Exhibit  in  respect  of  the  Facility  in  all  material  respects  and  the  
Facility is free of defects or deficiencies, and has been designed, constructed, commissioned, started up, tested, 
maintained and is operating in accordance with the Work Scope and the other requirements of this Exhibit;

(ii)  Seres shall have access to all Design Documents in respect of the Facility (excluding any redlined as-built drawings), 

test data, training and other technical 

 
 
information required hereunder or necessary for Manufacturing at the Facility in a safe and reliable manner;

(iii)  Seres  has  received  results,  confirmed  by  a  professional  engineer  employed  by  a  subcontractor  listed  in  Exhibit  9,  
demonstrating that Bacthera has successfully completed the Work and equipment is installed and ready to begin 
Performance Testing;  

(iv)  All special tools (e.g. specific keys to access Facility areas and equipment) then to have been furnished in respect of 

the Facility pursuant to this Agreement have been delivered;

(v)  The Facility is ready for normal continuous and safe operation; and

(vi)  Bacthera has performed its other obligations in respect of the Facility under all other provisions of this Exhibit, and 
delivered  all  items  in  respect  of  the  Facility  required  by  this  Exhibit  as  are  then  expressly  required  to  be 
performed or delivered.

(b)  Once all of the foregoing conditions have been satisfied (or waived by Seres), the “Substantial Completion Date”  shall  be 

deemed to have occurred. 

9.  QUALIFICATION AND ACCEPTANCE.

9.1  Provisional Acceptance.  

(a)  Upon successful completion of the Performance Tests and compliance with all other conditions to Provisional Acceptance set 
forth  in  this  Section 9.1 (“Provisional Acceptance”),  Bacthera  shall  give  Seres  notice  that  Provisional  Acceptance  has 
occurred. Such notice shall include a request by Bacthera that Seres issue the Provisional Acceptance Report in accordance 
with this Section 9.1.  Provisional Acceptance shall only occur when, in addition to the conditions of 8.1, the following 
conditions have been satisfied:  

(i)  Seres has received results, confirmed by an independent engineer, employed by a subcontractor listed in Exhibit 9, 

demonstrating that Bacthera has successfully achieved Substantial Completion 

(ii)  Seres has access to the Design Documents in respect of the Facility (including redlined draft as built drawings), test 
data, training and other technical information to be provided on or before Provisional Acceptance, including, at a 
minimum,  those  Design  Documents  and  related  technical  information  reasonably  required  for  the  safe  and 
reliable operation of the Facility;

(iii)  Seres has received a written notification by the Project Manager confirming the satisfaction of each of the foregoing 

items in this Section 9.1; and

(iv)  The qualified engineer (employed by a subcontractor listed in Exhibit 9) has certified that each of the foregoing items 

(and the requirements set forth therein) has been satisfied in accordance with this Exhibit.

 
 
(b)  Once  all  of  the  foregoing  conditions  have  been  satisfied  (or  waived  by  Seres),  the  Provisional  Acceptance  Date  shall  be  
deemed to have occurred on the date on which all of the conditions set forth in this Section 9.1 have been achieved. 

9.2  Final Acceptance.  

(a)  Bacthera  shall  ensure  that  CQV  Completion  and  Final  Acceptance  of  the  Facility  occurs  no  later  than  [***]  days  after  the  
Provisional Acceptance Date.  Final Acceptance shall occur only when Bacthera issues a final handover report (the “Final 
Acceptance Report”), documenting that the following conditions have been satisfied (“Final Acceptance”):  

(i)  all of the conditions for Provisional Acceptance have been met;

(ii)  Bacthera has completed final clean up, final grading, final painting and insulation in respect of the Facility site and 

the Facility;

(iii)  Bacthera has obtained all final Permits required to be obtained by Bacthera in respect of the Facility and any other 

area relevant for the Manufacture of the Product(s);

(iv)  Bacthera made access available to Seres to the final, electronic “as built” drawings for the Facility;

(v)  The Facility complies with Applicable Law.

(vi)  Bacthera has delivered evidence satisfactory (as part of the Final Acceptance Report) to Seres that all liens arising out 
of, or in connection with, any Facility Material, equipment, the Facility, or the performance by Bacthera or any 
Subcontractor of the Work have been satisfied or discharged;

(vii) Bacthera has fully performed all other provisions of and delivered all items required by this Exhibit;

(viii) 

Seres  has  received  a  written  notification  by  the  Project  Manager  confirming  the  satisfaction  of  each  of  the  
foregoing items in this Section 9.2; and

(ix)  a qualified engineer (employed under a subcontractor listed in Exhibit 9) has certified that each of the foregoing items 

(and the requirements set forth therein) has been satisfied in accordance with the Exhibit.

(b)  The  Final  Acceptance  Report  shall  be  conclusive  evidence  that  the  Facility  is  in  accordance  with  this  Exhibit;  provided,  
however,  that  nothing  contained  in  this  Section  9.2  shall  relieve  Bacthera  from  performing  any  obligations  remaining 
under this Exhibit after Final Acceptance, including any of its warranty obligations hereunder.  Once all of the foregoing 
conditions have been satisfied (or waived by the Seres), the Final Acceptance Date shall be deemed to have occurred on 
the date on which all of the conditions set forth in this Section 9.2 are first satisfied.

 
 
10.  CHARGES AND PAYMENT. 

10.1 Initial CapEx Target.  The Charges for the Work shall be equal to the CapEx Target, as it may be adjusted under Section 10.2 or Section 
12.  The “CapEx Target” as of the Effective Date is [***]. In no event will the CapEx Target be adjusted other than for capital 
expenses incurred solely in connection with the Facility.  Except for Seres’ obligation to pay the Final CapEx Amount, Bacthera 
shall be responsible for all [***].

10.2 Adjustments.  

(a)  The CapEx Target shall be adjusted (i) upon acceptance of the final Initial Design Documents by Seres pursuant to Section 5.1 
(“First Adjustment”) and (ii) upon CQV Completion (“Second Adjustment”), each in accordance with this Section 10.2.  

(i)  First Adjustment.  Within [***], Bacthera will propose, for review by the JSC, an updated CapEx Target to reflect any 
increases  or  decreases  in  the  capital  expenses  associated  with  the  Project.    [***].      Seres  shall  not  dispute  the 
proposal submitted by Bacthera under this clause (i) unreasonably. 

(ii)  Second Adjustment.  Within [***], Bacthera will propose, for review by the JSC, an updated CapEx Target to reflect 
any  increases  or  decreases  in  the  capital  expenses  associated  with  the  Project.    [***].      The  CapEx  Target  as 
adjusted pursuant to this paragraph is the “Final CapEx Amount”. Seres shall not dispute the proposal submitted 
by Bacthera under this clause (ii) unreasonably.

(iii)  Bacthera may only include an increase of the equipment included in the Facility Materials in the calculation of the 
First Adjustment and Second Adjustment if it demonstrates that the equipment included in the Facility Materials 
set forth in the final Initial Design Document is not sufficient to meet the Approved Specifications.

(iv)  Any other adjustment shall be reviewed and agreed on by the JSC

Bacthera  will  maintain  and  provide  to  Seres  all  documentation  (including  invoices  and  payments)  related  to  the  amounts  included  in  the 
CapEx Target, Adjusted CapEx Target and Final CapEx Target up to date required in accordance with Section 13.7 of the Agreement. 

11.  PAYMENT.

11.1 Milestone Payments.

(a)  Seres shall pay Bacthera the Final CapEx Amount (as it may be adjusted under this Agreement) upon completion by Bacthera 
of the applicable milestones set forth in and in accordance with the following milestone payment schedule (the “Milestone 
Payment Schedule”).  

 
 
MILESTONE

MILESTONE PAYMENT (CAPEX TARGET) 

Contract Signature 

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

(b)  The  above  Milestone  Payments  will  be  adjusted  on  a  pro-rata  basis  (as  determined  by  the  JSC)  for  (i)  any  differences  (A)  
between the CapEx Target under Section 10.1 and the Adjusted CapEx Target; or (B) between the Adjusted CapEx Target 
and the Final CapEx Target; and (ii) any changes to the CapEx Target pursuant to Section 12 of this Exhibit 1.

(c)  Seres may apply the Deposit against any amounts owed under this Exhibit 1.  

11.2  Progress Reports.  Bacthera  shall  submit  a  Progress  Report  in  accordance  with  Section  6  as  part  of  each  invoice.  In  the  event  that 
Bacthera does not submit an invoice in any particular month, Bacthera shall nonetheless submit a Progress Report to Seres.

11.3 Milestone Payments. Seres shall review each such invoice and make payments in accordance with the Milestone Payment Schedule in 

Section 11.1(a).  

11.4 Effect of Payment.  Payment of the contract price or any portion thereof shall not (a) constitute Seres’s approval or acceptance of any 
portion of the Facility Materials, equipment or Work, (b) constitute a waiver of any right or remedy Seres may have with respect to 
any portion of the Facility Materials or Work that has been, or subsequently is, determined not to have been delivered or performed 
in accordance with this Exhibit, or (c) release Bacthera from any obligation or liability hereunder.

12.  CHANGES IN THE WORK BY CONTRACT, LAW OR OTHERWISE.

12.1 General.  

(a)  Seres may at any time order changes to the Work, which orders shall be subject to Bacthera’s approval, which shall not be 
unreasonably withheld, conditioned or delayed. Bacthera its Affiliates or any subcontractors may propose changes to the 
Work  for  Seres’  consideration,  which  changes  shall  be  subject  to  Seres’  approval,  which  shall  not  be  unreasonably 
withheld,  conditioned  or  delayed.    If  both  Parties  agree  that  the  proposal  to  modify  the  Work  pursuant  to  this  Section 
12.1(a) should be implemented, Bacthera shall issue a Change Order incorporating such proposal. Any such Change Order 
shall  be  accompanied  by  a  proposal  consisting  of  the  contents  set  forth  in  Section  12.2  and  shall  include  any  other 
information either Party reasonably deems necessary to evaluate the proposed Change Order. Upon receiving such written 
approval, Bacthera shall diligently perform the change in strict accordance with the terms thereof. Bacthera, its Affiliates 
or 

 
 
 
any  subcontractors  may  propose  to  the  JSC  a  Change  Order  with  respect  to  (i)  Force  Majeure  Events,  (ii)  Seres  caused 
delays, (iii) changes in Applicable Law, (iv) Seres-directed or approved changes, and (v) any unreasonable and prolonged 
delays in the review or approval by Seres, its agents or designees of materials submitted for its review or approval pursuant 
to  the  terms  hereof.  The  JSC  may  not  withhold  its  consent  to  the  proposal  unreasonably.   Bacthera’s  cost  for  detailing 
changes  to  the  Work  which  were  requested  or  otherwise  caused  by  Seres  shall  be  reimbursed  by  Seres.    The  Project 
Execution Plan will further define the specific Change Order process.

(b)  Bacthera shall notify Seres and its agent as soon as practicable of any Force Majeure Event, Seres caused delay, change in 
Applicable Law or any other basis for a Change Order (“Notice”).  Such Notice shall, to the extent practicable, specify the 
impact  upon  the  various  portions  of  the  Work  occasioned  by  reason  of  such  Force  Majeure  Event,  Seres  caused  delay, 
change in Applicable Law or any other basis for a Change Order, as applicable. 

(c)  Any change to the contract price, the Detailed Schedule or any other terms and conditions of this Exhibit pursuant to a Change 

Order shall be equitable under the circumstances. 

(d)  All changes in the Work shall be authorized by a written Change Order executed by Seres.  

(e)  Bacthera  agrees  that  unless  otherwise  stated  in  the  Change  Order,  and  in  accordance  with  the  Project  Execution  Plan,  the  
Change  Order  shall  constitute  the  final  and  complete  compensation  and  satisfaction  for  all  costs  and  scheduled  effects 
related to (a) the implementation of the stated changes and (b) the cumulative impact of effects resulting from the stated 
changes on all prior Work and changes in the Work to be performed as scheduled.  [***].

(f)  No  Change  Order  shall  be  issued  in  connection  with  any  defects  or  deficiencies  caused  by  Bacthera,  its  Affiliates,  or  

subcontractor in the performance of the Work hereunder.

12.2 Change Order Pricing and Payment.

(a)  As soon as practicable after an event specified in Section 12.1 requiring a potential Change Order or after receipt from Seres 

of a request for a change, Bacthera shall submit to Seres a proposal for implementing the change.  

(b)  The  proposal  shall  consist  of:  (a)  a  detailed  cost  estimate,  including  direct,  indirect  and  engineering  costs,  fees  and  
contingencies,  each,  if  commercially  reasonable,  supported  by  bids  for  Facility  Materials  and/or  supporting  calculations 
and  in  accordance  with  the  pricing  structure  set  forth  in  this  Exhibit  for  pricing  the  change;  (b)  revisions,  if  any,  to  the 
Design Documents; (c) anticipated impacts to the approved Detailed Schedule; (d) an estimate of the anticipated result; 
and (e) any modifications that might arise in Bacthera’s warranties.

(c)  Bacthera’s  supporting  calculations  shall:  (a)  show  the  estimated  quantities  of  manpower,  construction  labor,  subcontracts,  
Facility Material and equipment usage and services to be added and/or deducted by size, type and/or amount provided, (b) 
be based on the rates agreed by the Parties to determine price, man-hours per unit of installed Facility 

 
 
Materials,  equipment,  rental  rates  and  other  similar  cost  standards,  and  (c)  contain  a  breakdown  for  rental  equipment, 
plant, overhead, fees and contingencies.

(d)  Unless otherwise agreed by the parties, the amount paid for any Work conducted pursuant to a Change Order shall be based on 
a  fixed  price  or  time  and  materials  with  a  not  to  exceed  provision  agreed  to  by  Bacthera  and  Seres,  taking  into 
consideration any savings or costs incurred by Bacthera due to such change.

13.  BONUSES.

13.1 Bonus Schedule: 

(a)  If [***], or 

(b)  If [***]. 

(c)  If [***]. 

(d)  If [***]. 

13.2 Any payments, credits or bonuses under this Section shall be reimbursed via [***].

14.  QUALITY CONTROL AND INSPECTION; REJECTION OF THE WORK.

14.1 General & Safety.  Bacthera shall perform quality control and inspection services related to the Work as required by the Project Quality 
Management System, this Agreement and Prudent Industry Practices.   Bacthera shall perform all of its obligations hereunder in 
accordance with all Applicable Law.

14.2 Inspection Rights.    Upon  request  and  in  accordance  with  Section 3.1,  Seres  and  its  agents  or  designees  may:  (a)  make  inquiries  of 
Bacthera  and  visit  the  Facility  site  at  any  time  during  normal  business  working  hours,  and  have  access  to  the  Work,  and/or  (b) 
maintain a staff at the Facility site, in each case to (i) familiarize itself with the progress and quality of the Work, (ii) determine 
whether  the  Work  is  being  performed  and  is  proceeding  in  accordance  with  this  Exhibit,  and  (iii)  witness  such  tests,  without 
disrupting the Design and Construction Work. Any delay caused by activities under this Section shall be the responsibility of Seres. 

14.3 Correction of Work, Facility Material or Equipment.  Seres shall at any time have the right to reject, or to direct Bacthera to dispute, 
any such portion of the Work, which does not conform to this Agreement.  Upon notice of such rejection, Bacthera shall respond 
within a reasonable period of time and as soon as practicable under the circumstances.   Seres shall have the right to utilize any 
rejected portion of the Facility Materials, equipment or the Work at their own risk, until such time as replacement Facility Material, 
equipment is delivered and incorporated into the Facility. If either Party disputes the (non-)conformance of the Work, resolution will 
follow the escalation pathway in Section 17 of the Agreement.

Attachments

The following Attachments attached hereto are incorporated by reference:

 
 
ATTACHMENT

TITLE

A

Initial Design Document as the Concept Design Report

 
 
 
 
[***]

ATTACHMENT A

 
 
 
PRODUCT SPECIFICATIONS – INCLUDES QC SAMPLING PLANS AND TEST METHODS

[***]

EXHIBIT 2

 
 
 
[***]

EXHIBIT 3 

SERES SUPPLIED MATERIALS

 
 
 
 
EXHIBIT 4

CHARGES

1.  CHARGES GENERALLY

1.1  Seres shall pay Bacthera the following Charges for the Manufacture of the SER-109: the Suite Fee set forth in Section 2.1 (as it may be 
adjusted pursuant to Section 3), the Additional Batch Fee set forth in Section 2.2, and the Procurement Fee set forth in Section 2.3.  
In addition, Seres shall pay the following Charges to the extent applicable: the External Storage Charges set forth in Section 2.4, the 
Regulatory Support Charge set forth in Section 2.5 and any other Charges under the Agreement. 

1.2  The Cancellation Fee is set forth in Section 4.2 and the Termination Assistance Charges are set forth in Section 4.3.

1.3  For purposes of this Exhibit, an “FTE” means [***] minus vacation and holidays). 

1.4  The Base FTEs shall accurately maintain shift records up to and including the prior calendar year to document time worked.  Bacthera 

shall provide Seres with access to such shift records upon request.

1.5  “Year 1” means [***], provided that [***], and all other “Years” mean calendar years other than the last Year of the Term, which shall 

commence on January 1 and end on the last day of the Term. 

1.6  “Capacity Allocation” means, for a Year, the [***] (except that Year 0 Capacity Allocation shall be adjusted pro rata for the portion of 

a full calendar year it reflects).

2.  PRICING

2.1  Suite Fee.

(a)  The Suite Fee shall be an annual fee of [***] (as may be adjusted pursuant to Sections 3 and 5 of this Exhibit 4 or Section 13.2 
of Exhibit 1) and shall be paid in 12 equal monthly instalments (except that Year 0 (2023) Suite Fee shall be adjusted pro 
rata  for  the  portion  of  a  full  calendar  year  it  reflects).  For  the  calendar  year  2023,  Seres  shall  receive  a  credit  of  [***] 
which shall be applied against the Suite Fee, unless the Suite Fee in calendar year 2023 is less than [***], in which case 
the entire Suite Fee for 2023will be eliminated and the remainder of the difference between [***] and the Suite Fee for 
2023 shall be credited against the Year 1 Suite Fee.  

(b)  [***] and each Year thereafter Seres shall communicate to Bacthera the planned Capacity Allocation of such Year [***]. The 

Capacity Allocations are as follows:

 
 
 
 
Table 1
Capacity Allocation

Capacity Allocation 1
Capacity Allocation 2

Capacity Allocation 3

Capacity Allocation 4

Capacity Allocation 5

B
[***]
[***]

[***]

[***]

[***]

A
[***]
[***]

[***]

[***]

[***]

(c)  The Suite-Fee for Year 1 and each Year thereafter shall include the number of Scale A Batches and Scale B Batches (the “Base 

Batches”) set forth on Table 2 applicable to the Capacity Allocation for such Year.

Table 2

Batches included in: 

Maximum Capacity

Capacity Allocation

Theoretical 
Capacity

Base Batches 
included in Suite 
Fee

Additional Batches 
Tier 1

Additional Batches 
Tier 2

Additional Batches 
Tier 3

Number of Batches Number of Batches Number of Batches Number of Batches

Capacity Allocation 
1 
Capacity Allocation 
2
Capacity Allocation 
3 
Capacity Allocation 
4 
Capacity Allocation 
5 

Scale B
[***]

Scale A
[***]

Scale B
[***]

Scale A
[***]

Scale B
[***]

Scale A
[***]

Scale B
[***]

Scale A
[***]

Scale B
[***]

Scale A
[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

Table 2 -Base Batches and Additional Batches 

(d)  If, during a Year, Seres desires to order [***], it can do so by [***].  The Capacity Allocation for Scale A and Scale B shall 

always sum up to be [***]%. 

(e)  [***]of the Suite Fee shall be invoiced on the [***] of the month following commencement of the CQV Completion or the 
earlier commencement of Manufacturing and shall continue each successive month thereafter throughout the Term and the 
Ramp-Down Period.

(f)  The Suite Fee amount is independent of the number of Batches ordered per year. 

 
 
 
 
 
 
(g)  If the total count of Scale A Base Batches and Scale B Base Batches Released in a Year exceeds [***], Seres shall pay an 
additional fee (the “Release Fee”) of [***].  There shall not be any Release Fee imposed on Batches for which there is an 
Additional Batch Fee.

(h)  Examples  of  the  intent  of  the  Parties  as  how  to  apply  these  calculations  have  been  provided  to  the  Seres  VP  Commercial  

Manufacturing via email on 12.10.2021 and will be recorded at the first meeting of the JSC. 

2.2  Additional Batch Fee.

(a)  Seres  shall  pay  the  Additional  Batch  Fee  for  all  Batches  delivered  in  accordance  with  the  Agreement  in  excess  of  the  
applicable Base Batches for the Year.  There are three tiers of Additional Batch Fees for each of the Capacity Allocations, 
as further defined in Tables 3 and 4.

(b)  [***].

(c)  The Additional Batch Fee (as may be adjusted pursuant to Sections 3 and 5) for Scale B Batches and Scale A Batches are as 

follows: 

TABLE 3 -ADDITIONAL BATCH SCALE B FEE

YEAR

TIER 1

TIER 2

TIER 3

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

 
 
 
TABLE 4 -ADDITIONAL BATCH SCALE A FEE

YEAR

TIER 1

TIER 2

TIER 3

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

2.3  Procurement Fee.  The JSC shall set the Procurement Fee [***] prior to the commencement of each Year.  The Procurement Fee shall be 

the [***] (the “Procurement FTE Rate”). 

2.4  External Storage Charges.  [***].

MATERIAL

STORAGE SPACE INCLUDED IN SUITE FEE

[***]

[***]

[***]

[***]

[***]

[***]

2.5  Regulatory Support Charges.  The Charges for complying with Seres requests for documents or other substantive requests for assistance 
in  compiling  or  preparing  any  regulatory  filing  (other  than  for  completion  of  the  SMF  and  routine  cGMP  certification  by 
Swissmedic); or attendance in meetings with Regulatory Authorities by Bacthera that solely relate to the Facility and the Product 
shall be charged to Seres on an FTE basis at [***]/day plus travel and accommodation costs.

3.  ADJUSTMENTS TO THE SUITE FEE AND ADDITIONAL BATCH FEE

3.1  Initial Adjustments. 

(a)  [***]

[***]

[***]

[***]

[***]

[***]

[***]

]

 
 
 
 
(b)  The “Base FTEs” for one shift are [***] FTEs and for two shifts are [***]FTEs.  For avoidance of doubt, the Base FTEs for a 

Year reflect [***].  It is expected that [***] and [***].

(c)  Subject to the limitations in Section 3.1(a) (except to the extent such increased costs are the result of Seres’ acts and omissions 
prior  to  PPQ  Completion,  in  which  case  the  limitations  of  Section  3.1(a)  shall  not  apply),  the  [***].    There  shall  be  no 
increase pursuant to this Section 3.1(c) unless [***]. 

(d)  [***].

(e)  The Parties shall discuss and agree on the proposed adjustments under Section 3.1(c), and any agreed adjustments shall be 
[***].  If the Parties are unable to agree to the adjustment, either Party may treat the matter as a dispute pursuant to Section 
17 of the Agreement.

3.2  Reimbursement due to change in cGMP or Applicable Law and/or Product Specifications.

(a)  Without  limiting  the  provisions  of  Section  3.1,  if  a  change  in  the  Specifications  for  the  Product  is  requested  by  Seres  or  
mandated by changes in Applicable Law or cGMP after the Effective Date which  result in actual and material increased 
Manufacturing costs to Bacthera in respect of Product (i.e. higher than [***]), the Suite Fee and Additional Batch Fee shall 
be [***].  Allocation of [***]. 

(b)  If  a  change  in  the  Specifications  for  the  Product  result  in  actual  decreased  Manufacturing  costs  to  Bacthera  in  respect  of  a  

product (i.e. lower than [***]), the Suite Fee and Additional Batch Fee shall be [***]. 

(c)  Seres  shall  be  responsible  for  any  increase  in  Manufacturing  costs  in  respect  of  the  Product  resulting  from  a  discretionary  
change  in  Specifications  for  such  Product  requested  by  Seres.    It  is  acknowledged  and  agreed  that  changes  to  the 
Specifications for Product shall only be made in accordance with the provisions of the Quality Agreement.

3.3  Reimbursement of Additional Utilities Costs.  In the event the utility rate payable by Bacthera for any electricity used for, and necessary 
to,  Manufacture  the  Products  purchased  by  Seres  increases  by  more  than  [***]%  compared  to  the  average  utility  rate  during  the 
period [***] to [***] days immediately preceding such increase (the “Base Utility Rate”), Bacthera may implement a temporary 
utility surcharge on the Suite Fee to recover the actual incremental costs paid by Bacthera for such utility service, but only during 
the period that such increased utility rate actually exceeds the Base Utility Rate.  Bacthera will document all such increases that 
have led to, or will or may lead to, such utility surcharges applicable to Seres, and provide Seres with such documentation, along 
with  an  advance  written  notice  of  any  expected  utility  surcharge  on  the  Products.    Seres’  obligation  to  pay  the  surcharge  is 
conditioned on Bacthera providing reasonable evidence that it has allocated utility consumption in the CoE on a fair and equitable 
basis among all customers so that Seres is not paying for utility consumption that does not relate to the Manufacture of the Products.

3.4  Cost Reduction. 

 
 
(a)  Prior to the commencement of each Year, the JSC will review the [***].  The Suite Fee and Additional Batch Fee shall be 

[***]. 

(b)  The Suite Fee and Additional Batch Fee shall be [***].  Unless otherwise agreed by the JSC, the Suite Fee and Additional 
Batch  Fee  shall  be  reduced  by  [***]%  of  the  net  savings  achieved  by  the  reduction  (after  deducting  any  investments 
approved by the JSC and paid by either Party).

4.  OTHER CHARGES

4.1  Seres  Dedicated  Equipment.    Seres  shall  be  responsible  for  the  costs  of  procuring  and  implementing  replacements  for  items  of 
equipment dedicated to and owned by Seres in the Facility.  If the replacement of such an item is required prior to the end of its 
useful  life  due  to  [***],  Bacthera  shall  reimburse  Seres  in  an  amount  equal  to  the  depreciation  of  the  original  cost  of  the  item 
between the date of replacement and the end of the useful life of the equipment.  Otherwise Seres shall bear the cost of replacement 
of such item of equipment.

4.2  Cancellation Fee.

(a)  [***]. If the drug substance is not able to be used in a future batch, [***].

(b)  [***] (Section 2.2(c)).

(c)  [***].

4.3  Termination  Assistance  Charges.    The  Charges  for  complying  with  Seres  requests  for  Termination  Assistance  Activities  pursuant  to 

Sections 18.5 and 18.6 of the Agreement shall be charged on an FTE basis at [***]/day. 

5.  PPI ADJUSTMENT

5.1  The Suite Fee, Additional Batch Fee and the Release Fee shall be increased on a prospective basis at the end of each Year (excluding 

Year 0) by the change in the Index over the prior 12 month period. 

5.2  The Regulatory Support Charges, the Termination Assistance Charges and Procurement FTE Rate shall be increased on a prospective 

basis at the end of each Year by the change in the Index over the prior 12 month period. 

5.3  For  purposes  of  this  Section  5,  “ Index”  means  the  Swiss  Producer  Prices  Index  (December  2020=100)  as  published  by  the  Federal 
Statistical Office of Switzerland.  If the Federal Statistical Office of Switzerland ceases to publish the Swiss Producer Prices Index, 
then  either  Party  may  provide  written  notice  to  the  other  Party  to  meet  to  discuss  an  alternate  means  of  adjusting  the  Suite  Fee, 
Additional Batch Fee and FTE rates.  The Parties shall promptly meet after the date of such notice (in any event not later than 15 
days after such date) to agree such alternate means. 

 
 
 
 
EXHIBIT 5 

KEY PERSONNEL

List of Key Personnel:

The list below is referring to Key Personnel engaged in Manufacturing the Product for Seres. More than one key position can be covered by 
one person, like Production Head and MSAT lead as one and same person. 
[***]

 
 
 
 
 
 
[***]

EXHIBIT 6 

DIRECT FTE

 
 
 
EXHIBIT 7

MATERIALS ACQUIRED ON BEHALF OF SERES

The Exhibit 7 Materials acquired on behalf of Seres are listed in the table below. The list shall be updated during the Term and in accordance 
with the Agreement. The Exhibit 7 Materials defined below represent requirements for [***] at the time of the Effective Date. [***] and any 
amendments of [***] will be defined prior to Manufacturing. 

[***]

 
 
 
 
 
 
EXHIBIT 8

TECHNOLOGY TRANSFER

This is a draft document which outlines the Technical Transfer Concept and associated responsibilities for both Parties. The final Technical 
Transfer Plan will be completed and approved prior to [***].

Description of Technology Transfer Project Plan:

Seres  and  Bacthera  are  planning  the  commercial  supply  for  SER-109  by  transferring  the  Manufacturing  process  to  the  Facility.  Essential 
services  for  the  transfer  and  the  process  validation  are  [***].  This  project  plan  describes  the  draft  [***].  The  scope  reflects  the  current 
understanding  of  required  activities  for  the  transfer  of  the  manufacturing  process  as  of  the  Effective  Date.  These  estimates  are  subject  to 
change, as more information is developed/discovered and/or if the project plan changes. All activities of the Technology Transfer shall be 
performed in accordance with the Quality Agreement and cGMP.
Technology Transfer Concept
Seres and Bacthera have agreed to the Technology Transfer Concept, as described below:

•
•
•
•
•

Seres will provide [***].
Bacthera will perform [***]. Seres will provide [***].
After [***].
The Technology Transfer is [***].
After successful Technology Transfer, [***]. Seres will define the [***]. Additional [***] and after agreement between Seres and 
Bacthera and at Seres’ expenses. 

Production Concept
Bacthera assumes that the manufacturing process from Seres transferred to the Facility is fully developed [***] and will be able to produce 
product  according  to  specifications.    The  process  must  be  implemented  at  Bacthera  [***].  The  agreed  strategy  is  [***].  Changes  to  this 
strategy will be treated by change request procedure. The impact of such change will be [***]. In the event additional work is required, an 
amended proposal will be issued. Cost associated to the change will be at [***] expense.

Analytical Methods
No changes to the analytical testing scheme [***] as outlined in Exhibit 2 is assumed for the commercial manufacturing of SER-109, and 
Bacthera  foresees  the  successful  transfer  of  validated  or  compendial  Analytical  Methods  to  Bacthera  latest  by  [***].  In  the  event  that 
additional analytical methods will need to be implemented for the comparability study, Bacthera and Seres shall mutually agree to the scope 
of work and an amended proposal will be issued.

General Assumptions

•

•

Document review and approval workflow: Following issuing of the document to Seres, the following review and approval workflow is 
assumed: Documents are reviewed in [***] by Seres within [***]. Afterwards, the documents are revised by Bacthera within [***] and 
finally sent to the customer for approval of the revisions within [***] of issue, if not agreed otherwise. 

The timeline assumes that there are no supplier-related delays for Single Use materials, and other raw materials.

 
 
 
 
 
 
•

•

•

•

•

•

The timeline assumes a timely availability of key analytical data (some tests done by Seres) following the Engineering campaign and no 
major required changes of batch records prior to the Validation Campaign.

Raw material provided by Seres (SRM) will be handled in accordance with Exhibit 2 and the Quality Agreement.

All Exhibit 7 Materials can be sourced with a certificate for the absence of adventitious agents such as, but not limited to BSE/TSE-free, 
latex, gluten, and lactose free.

PPQ-batch release readiness is achieved with successful IPCs and release testing as per commercial manufacturing sampling plan. Final 
release will be completed after regulatory approval is granted.

Excess material and analytical samples generated during transfer and development phase are frozen at [***]. After [***] are discarded. 
For  bulk  material,  Bacthera  contacts  the  customer  to  determine  which  material  can  be  (I)  discarded,  (II)  shipped  or  (III)  stored  at 
Bacthera (storage fee applies). Required retains per the sample plan will be maintained per retention requirements.

All raw data generated during the work performed in this proposal will be provided to Seres in an Excel format. Please note that the raw 
data provided will not be QA reviewed and is for information only.

TT Package from Sending Site (Seres)
The Tech transfer package from Seres is expected to include but not be limited to the relevant information of the following items:

•

•

•

•

•

•

•

•

•

Raw Material List 
[***]

Equipment List 
[***]

Utilities List 
including specifications and estimated consumption

BFD manufacturing process 
including mass balance solutions

Relevant physical properties, including stability of product and intermediates 

All relevant SOPs related to manufacturing and testing of the product

•

In-process and release tests (SOPs, Requirements etc.)

• Master Batch Record and Batch records (filled in) for all production steps and media / buffers

•

Validation Master Plan and Report from previous campaigns

Process, Cleaning and Containment strategy, Validation Reports from previous campaigns 

Risk assessments (Process, Leachable Extractables, Containment, Cleaning, etc.)

Leachable and Extractable studies 

• Hold studies for intermediates

 
 
• Mixing studies

•

•

Process Data (e.g. Golden Batch, Process robustness data, small scale data, etc.)

Bioburden control strategy

 
 
 
 
Receiving Site Deliverables (Bacthera)

Deliverables from Bacthera will include but not be limited to:

•

•

•

•

•

•

•

•

•

•

•

Analytical Method Transfer Report (including Comparability Study)3

Documentation Transfer List/Report

Process / Equipment Descriptions and Critical Parameters

Transfer Protocol BOM – Raw Materials Comparison

Product Formulation and batch sizes

Batch Records 

Process Validation Strategy, Plan and Reports

Cleaning Validation Report1 

Risk assessments (Process, Leachable Extractables, Containment, Cleaning, etc.)

Raw Material Vendor Qualification4

Container Closure Integrity Study2 (required for new bottles)

1 washer load validation is limited to non-standard (project specific) loads as is part of the pre-production activities.
2 The scope and effort for validation of a new end-fill container (multi dose bottle) will be discussed and agreed on in a separate change note, 
once the specifics are defined. 
3Shipping validation for QC samples to be shipped to Seres will be discussed and agreed in a separate change note, once the specifics are 
defined. 
 4Raw Material Vendor Qualification Status assessment is part of the routine set-up during pre-production. 
General: The exact timing and duration of activities need to be planned for in alignment with the project schedule.

Project Timelines and Milestones 

[***]   

 
 
 
 
 
 
 
 
 
 
EXHIBIT 9 

APPROVED SUBCONTRACTORS

As of Effective Date, not all Subcontractors are listed in Exhibit 9. List shall be amended by both Parties once Subcontractors are defined.

List of Approved Subcontractors:

Approved Subcontractors

Category / Type of Service

[***]

[***]

[***]

[***]

[***]

[***]

[***]

[***]

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-253776, 333-236824, 333-230092, 333-223514, 
333-210171 and 333-205253) and Form S-3 (Nos.333-244401 and 333-237033) of Seres Therapeutics, Inc. of our report dated March 1, 2022 relating to 
the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

Exhibit 23.1

/s/ PricewaterhouseCoopers LLP 
Boston, Massachusetts
March 1, 2022

1

 
 
 
 
Exhibit 31.1

I, Eric D. Shaff, certify that:

1. I have reviewed this Annual Report on Form 10-K of Seres Therapeutics, Inc.;

CERTIFICATIONS

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the 

statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the 

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in 

Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for 
the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our 
supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others 
within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our 
supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external 
purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the 

effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most 

recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to 
materially affect, the registrant’s internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to 

the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are 

reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal 

control over financial reporting.

Date: March 1, 2022

By: 

/s/ Eric D. Shaff
Eric D. Shaff
President and Chief Executive Officer
(Principal Executive Officer)

  
 
 
 
 
 
 
 
Exhibit 31.2

I, David Arkowitz, certify that:

1. I have reviewed this Annual Report on Form 10-K of Seres Therapeutics, Inc.;

CERTIFICATIONS

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the 

statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the 

financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in 

Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for 
the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our 
supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others 
within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our 
supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external 
purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the 

effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most 

recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to 
materially affect, the registrant’s internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to 

the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are 

reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal 

control over financial reporting.

Date: March 1, 2022

By: 

/s/ David Arkowitz
David Arkowitz
Executive Vice President, Chief Financial Officer and Head of 
Business Development
(Principal Financial and Accounting Officer)

  
 
 
 
 
 
 
 
 
CERTIFICATION PURSUANT TO 
18 U.S.C. SECTION 1350, 
AS ADOPTED PURSUANT TO 
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 

Exhibit 32.1

I, Eric D. Shaff, President and Chief Executive Officer of Seres Therapeutics, Inc. (the “Company”), hereby certify, pursuant to 18 U.S.C. §1350, as 
adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1)

(2)

The Annual Report on Form 10-K of the Company for the period ended December 31, 2021 (the “Report”) fully complies with the 
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the 
Company.

March 1, 2022

/s/ Eric D. Shaff
Eric D. Shaff
President and Chief Executive Officer
(Principal Executive Officer)

  
 
 
 
 
 
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 32.2

I, David Arkowitz, Executive Vice President, Chief Financial Officer and Head of Business Development of Seres Therapeutics, Inc. (the “Company”), 
hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1)

(2)

The Annual Report on Form 10-K of the Company for the period ended December 31, 2021 (the “Report”) fully complies with the 
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the 
Company.

March 1, 2022

/s/ David Arkowitz
David Arkowitz
Executive Vice President, Chief Financial Officer and Head of Business 
Development
(Principal Financial and Accounting Officer)