The following discussion and analysis of our financial condition and results of
operations should be read in conjunction with our financial statements and
related notes appearing elsewhere in this Quarterly Report on Form 10-Q for the
three and nine months ended September 30, 2020, or the Quarterly Report. Some of
the information contained in this discussion and analysis or set forth elsewhere
in this Quarterly Report, such as statements regarding our plans, objectives,
expectations, intentions and projections, includes forward-looking statements
that involve risks and uncertainties. As a result of many factors, including
those factors set forth in the ''Risk Factors'' section of this Quarterly
Report, our actual results could differ materially from the results described
in, or implied by, these forward-looking statements.

                                    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 repair the function of a disease susceptible
microbiome to a non-disease state. We have an advanced drug candidate pipeline
with late-stage clinical assets and a differentiate microbiome therapeutics drug
discovery and development platform including good manufacturing processes, or
GMP, capabilities for this novel drug modality. SER-109 is designed to reduce
recurrences of Clostridioides difficile infection (formerly Clostridium
difficile infection), or CDI, a debilitating infection of the colon, in patients
who have received antibiotic therapy for recurrent CDI by treating the dysbiosis
of the colonic microbiome. As described in further detail below, in August 2020,
we reported positive topline results from the pivotal Phase 3 ECOSPOR III study
evaluating SER-109 for recurrent CDI. If approved by the U.S. Food and Drug
Administration, or FDA, SER-109 could be a first-in-field oral microbiome drug.
SER-287 and SER-301 are being developed to treat ulcerative colitis, or UC. In
addition, using our microbiome therapeutics platform, we are developing SER-401,
a microbiome therapeutic candidate for use with checkpoint inhibitors in
patients with metastatic melanoma and SER-155 to prevent mortality due to
gastrointestinal infections, bacteremia and graft versus host disease ("GvHD")
in immunocompromised patients, including in patients receiving allogeneic
hematopoietic stem cell transplantation (allo-HSCT). Supporting our R&D efforts
are our deep capabilities related to microbiome therapeutic drug discovery,
manufacturing, quality, and clinical development.  We believe that these
capabilities provide us with important competitive advantages related to the
advancement of this novel treatment modality.

Since our inception in October 2010, we have devoted substantially all of our
resources to developing our programs, building our intellectual property
portfolio, developing our supply chain, business planning, raising capital and
providing general and administrative support for these operations.

All of our product candidates other than SER-109, SER-287, SER-301, SER-401, and
SER-155 are still in pre-clinical 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 or more of our product candidates. Since our inception, we have incurred
significant operating losses. Our net loss was $70.9 million for the nine months
ended September 30, 2020. As of September 30, 2020, we had an accumulated
deficit of $530.5 million and cash, cash equivalents and short- and long-term
investments totaling $320.3 million. Based on our current plans and forecasted
expenses, we believe that our existing cash, cash equivalents and investments as
of September 30, 2020 will be sufficient to fund our operating expenses and
capital expenditure requirements for at least the next 12-months from issuance
of our unaudited condensed consolidated financial statements included elsewhere
in this Quarterly Report on Form 10-Q.

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 our 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.

Also 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, or the "concurrent placement." We received aggregate net proceeds from the concurrent placement of approximately $19.9 million after deducting offering expenses payable by us. See "-Liquidity and Capital Resources."

Impact of Novel Coronavirus



We are monitoring the global outbreak and spread of the novel strain of
coronavirus, or COVID-19, 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 the COVID-19 pandemic.
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

                                       22

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determine are in the best interests of our employees, and other business
partners in light of COVID-19. Given the fluidity of the COVID-19 pandemic
however, we do not yet know the full extent of the potential impact of COVID-19
on our business operations. We will continue to closely monitor the impact of
the COVID-19 pandemic on our operations and ongoing clinical development
activity. For additional information related to the potential impact of COVID-19
on our business, please read Part II-Item 1A, "Risk Factors" of this Quarterly
Report on Form 10-Q.

SER-109

SER-109 is an oral, biologically-derived, purified bacterial spore-based
microbiome therapeutic candidate consisting of bacterial species purified from
healthy donor stool. Our SER-109 manufacturing process includes inactivation and
clearance steps designed to eliminate potential pathogens. SER-109 is designed
to prevent further recurrences of CDI in patients with a history of multiple
infections by restructuring the dysbiotic microbiome to a state that resists C.
difficile colonization and growth.

In August 2020, we reported positive topline results from the pivotal Phase 3
ECOSPOR III study evaluating SER-109 for recurrent CDI. The study showed
that SER-109 administration resulted in a highly statistically significant
absolute decrease of 30.2% in the proportion of patients who experienced a
recurrence in CDI within eight weeks of administration versus placebo, the
study's primary endpoint, and which remained consistent at 12-weeks end point
with a 31.1% absolute decrease. At eight weeks of treatment, 11.1% of patients
administered SER-109 experienced a CDI recurrence, versus 41.3% of placebo
patients. The study results were equally compelling when characterized by the
alternative metric of sustained clinical response, where 88.9% of patients in
the SER-109 arm achieved this objective at eight weeks.

The study's efficacy results exceeded the statistical threshold previously
provided in consultation with the FDA that could allow this single clinical
study to fulfill efficacy requirements for a biological license application, or
BLA. The SER-109 safety results observed to-date were favorable, with an adverse
event profile comparable to placebo. We are actively enrolling patients in our
SER-109 open-label study, which also admits patients with a single recurrence of
CDI, to expand the safety database to meet the FDA guidance of at least 300
patients.

SER-109, if approved, is intended to treat individuals with recurrent CDI, a
patient population which includes approximately 170,000 individuals per year in
the United States. We completed enrollment with 182 patients of 188 intended
subjects with multiply recurrent CDI in ECOSPOR III. All patients who entered
ECOSPOR III must have tested positive for C. difficile toxin, as currently
recommended by the Infectious Diseases Society of America guidelines (McDonald
Clin Infect Dis 2018). 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 of comparing the C. difficile recurrence rate in subjects who
receive SER-109 verses placebo at up to eight weeks after dosing.

SER-287



SER-287 is an oral, biologically-derived purified microbiome therapeutic
candidate designed to normalize the gastrointestinal microbiome of individuals
with UC. In December 2018, we commenced a three-arm placebo-controlled Phase 2b
clinical trial that was designed to evaluate SER-287 in approximately 201
patients with mild-to-moderate UC. Two groups of patients are receiving
different doses of SER-287, both following pretreatment with a short course of
oral vancomycin. A third study arm will receive placebo. The study's primary
endpoint will evaluate clinical remission measured after 10 weeks of SER-287
administration. Patients then enter a 2-week exploratory maintenance follow-up
period. Endoscopic improvement will be measured as a secondary efficacy
measure. Based on feedback from the FDA, if the data from this trial is
positive, we expect that the Phase 2b clinical trial could be one of two pivotal
trials to enable a BLA to be submitted for SER-287 for the treatment of UC. The
SER-287 Phase 2b study is over 75% enrolled based on the 201-patient target
study size. SER-287 development activity has been adversely impacted by the
COVID-19 pandemic and by multiple clinical sites halting non-essential
procedures, including endoscopies. In recent weeks, we have observed an increase
in ECO-RESET clinical site activity, the availability of endoscopies, and in the
volume of clinical study subject screening. Seres is evaluating enrollment
mitigation strategies and possible trial design modifications with the goal of
obtaining a high-quality, clinically meaningful dataset. We plan to engage FDA
in discussions regarding any potential trial modifications.

There are approximately 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. We
believe that SER-287 may address underlying drivers of inflammation in UC and,
based on the favorable tolerability profile observed in our clinical trials of
SER-287, has the potential to be developed as both a foundational monotherapy,
as well as a combination therapy with other UC drugs. 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.

                                       23

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SER-301



We are also advancing our next generation, rationally-designed, fermented
microbiome drug discovery and development capabilities, focusing on advancing
SER-301, a therapeutic candidate for UC. We have nominated the SER-301 lead
candidate. SER-301 is a consortia of 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
designed to reduce induction of pro-inflammatory activity, improve epithelial
barrier integrity and TNF-? driven inflammation in 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.



We have initiated clinical development activities for SER-301, and in November
2020 we enrolled our first patient in the SER-301 Phase 1b study. This initial
clinical study of SER-301 will be conducted in Australia and New Zealand. As a
result of enrolling the first patient in the clinical study, we are entitled to
receive a $10.0 million milestone payment under our collaboration agreement with
Nestec Ltd.



SER-401



SER-401 is an oral biologically-derived purified microbiome therapeutic
candidate comprising a bacterial signature similar to that observed in
checkpoint inhibitor immunotherapy responders. In March 2019, the first patient
was dosed in the Phase 1b clinical study with MD Anderson and PICI, to evaluate
SER-401's potential to augment the response of anti-PD-1 checkpoint inhibitor
therapy. The study is designed to enroll 30 patients with metastatic melanoma
who are being treated with nivolumab, an anti-PD-1 therapy. Patients are
randomized at a 2-to-1 ratio to either SER-401 or placebo. The study's primary
endpoints are to evaluate safety and tolerability. Its secondary endpoints are
to evaluate the correlation of microbiome biomarkers of response to various
clinical and immunological outcome measures.

Seres continues to monitor the impact of the COVID-19 pandemic on company
operations and ongoing clinical development activity, including on the SER-401
Phase 1b study in metastatic melanoma. Mitigation activities to minimize
COVID-19-related operation disruptions are ongoing, however, given the severity
and evolving nature of the situation, the timing of the SER-401 Phase 1b
clinical readout is uncertain.

SER-155



We have nominated the SER-155 lead candidate, a rationally-designed, fermented
microbiome drug and are advancing the candidate into clinical development. 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 graft versus
host disease, or GvHD. SER-155 is consortia of bacteria designed using our
reverse translational discovery platform to prevent mortality due to
gastrointestinal infections, bacteremia and GvHD in immunocompromised patients,
including in patients receiving allogeneic hematopoietic stem cell
transplantation (allo-HSCT) or solid organ transplants. SER-155 lead candidate
is designed to decrease infection and translocation of antibiotic resistant
bacteria in the gastrointestinal tract and modulate host immune responses to
decrease GvHD. In November 2017, we were awarded a highly competitive grant
from CARB-X to support continued preclinical research and early development work
for SER-155. In 2019, Seres was awarded additional funding from CARB-X to
support clinical development of SER-155, including support through IND filing
and Phase 1b evaluation. The 2019 CARB-X grant provides us with an additional
$4.8 million of funding for research, manufacture, and IND application, with
potential for an additional $7.0 million for Phase 1b development, upon
completion of milestones.

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 and prepare for commercialization of

SER-109 for the prevention of recurrent CDI;

• continue the clinical development of SER-287 in our Phase 2b clinical


        trial for the treatment of UC;


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

• continue the clinical development of SER-401 in our Phase 1b clinical

trial for use with checkpoint inhibitors in patients with metastatic

melanoma;

• initiate clinical development of SER-155 for the prevention of mortality

due to GvHD in immunocompromised patients, including in patients receiving


        allo-HSCT;


  • make strategic investments in manufacturing capabilities;


                                       24

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• 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.




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. See "Risk Factors-Risks Related to Our Operations-The
COVID-19 pandemic caused by the novel strain of coronavirus 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 II, Item 1A of this Quarterly Report on Form 10-Q. 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.

                             Intellectual Property

Patent Portfolio

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 2033. We plan on continuing to broaden our patent
portfolio. Currently, we have 21 active patent application families, which
includes 15 nationalized applications and 1 pending US provisional application.
To date, we have obtained 13 issued U.S. patents.

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.

                         Financial Operations Overview

Revenue

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.


                                       25

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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. All costs associated with the collaboration and license
agreement, or the License Agreement, with Nestec Ltd., or NHS, and the Research
Agreement are recorded in research and development expense in the condensed
consolidated statements of operations and comprehensive loss.

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.

The table below summarizes our research and development expenses incurred on our
platform and by product development program for those that have begun clinical
development.



                                            Three Months Ended          Nine Months Ended
                                               September 30,              September 30,
                                             2020          2019         2020          2019
                                              (in thousands)              (in thousands)
Microbiome therapeutics platforms         $   12,456     $ 10,861     $  36,744     $ 37,684
SER-109                                        5,668        2,829        12,199        7,690
SER-287                                        3,870        4,430        13,109       12,105
Early stage programs                           1,867          197        

3,651 1,630 Total research and development expenses $ 23,861 $ 18,317 $ 65,703 $ 59,109






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 conduct our ECOSPOR III Phase 3 clinical study
of SER-109, advance the clinical development of SER-287, continue to discover
and develop additional product candidates, including SER-301, SER-401 and
SER-155 and pursue later stages of clinical development of our product
candidates.



                                       26

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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 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.

Our general and administrative expenses may 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. 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 rules and the requirements of the Securities and Exchange
Commission, or the SEC, director and officer insurance costs and investor and
public relations costs.

Restructuring

In February 2019, we implemented corporate changes to focus our resources on
advancing our clinical-stage therapeutic candidates. As a result, we are
concentrating on obtaining results from the ongoing SER-109 Phase 3 study for
recurrent CDI, completing our SER-287 Phase 2b study in mild-to-moderate UC
patients, advancing the SER-401 Phase 1b study in collaboration with the PICI
and MD Anderson to evaluate augmenting checkpoint inhibitor response in patients
with metastatic melanoma, and advancing SER-301 into clinical development. In
connection with the prioritization of these therapeutics candidates, we made
changes to our management team and reduced headcount by approximately 30
percent.

Other Income (Expense), Net

Interest Income (Expense), 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.

Other Income

Other income primarily consists of 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. We did not provide for any income taxes in the three
and nine months ended September 30, 2020 or 2019.

      Critical Accounting Policies and Significant Judgments and Estimates

Our condensed consolidated financial statements are prepared in accordance with
accounting principles generally accepted in the United States. The preparation
of these condensed consolidated financial statements requires the application of
appropriate technical accounting rules and guidance, as well as the use of
estimates. The application of these policies necessarily involves judgments
regarding future events. These estimates and judgments, in and of themselves,
could materially impact the condensed consolidated financial statements and
disclosures based on varying assumptions. The accounting policies discussed in
our Annual Report on Form 10-K for the fiscal year ended December 31, 2019,
filed with the SEC on March 2, 2020, or the Annual Report, are considered by
management to be the most important to an understanding of the consolidated
financial statements because of their significance to the portrayal of our
financial condition and results of operations. There have been no material
changes to that information disclosed in our Annual Report during the three and
nine months ended September 30, 2020.

                                       27

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                             Results of Operations

Comparison of Three Months Ended September 30, 2020 and 2019

The following table summarizes our results of operations for the three months ended September 30, 2020 and 2019:





                                                   Three Months Ended September 30,
                                                      2020                   2019             Change
                                                                    (in thousands)
Revenue:
Collaboration revenue - related party           $             80       $          4,840     $   (4,760 )
Grant revenue                                              1,337                     85          1,252
Collaboration revenue                                          -                  2,106         (2,106 )
Total revenue                                              1,417                  7,031         (5,614 )
Operating expenses:
Research and development                                  23,861                 18,317          5,544
General and administrative                                 7,551                  5,897          1,654
Restructuring expenses                                         -                      -              -
Total operating expenses                                  31,412                 24,214          7,198
Loss from operations                                     (29,995 )              (17,183 )      (12,812 )
Other (expense) income:
Interest income                                              100                    335           (235 )
Interest expense                                            (730 )                    -           (730 )
Other income                                                 345                    439            (94 )
Total other (expense) income, net                           (285 )                  774         (1,059 )
Net loss                                        $        (30,280 )     $        (16,409 )   $  (13,871 )




Revenue



Total revenue was $1.4 million and $7.0 million for the three months ended
September 30, 2020 and 2019, respectively. The revenue for the three months
ended September 30, 2020 relates primarily to $1.3 million of grant revenue and
$0.1 million recognized under our license and collaborative agreement with
Nestec Ltd., or the License Agreement. The revenue for the three months ended
September 30, 2019 principally relates to the recognition of amounts received
under the License Agreement of $4.8 million and $2.1 million associated with our
research collaboration and option agreement with MedImmune, LLC, a wholly owned
subsidiary of AstraZeneca Inc., or the Research Agreement. The decrease of $5.6
million is mainly attributed to a $4.8 million decrease in the License Agreement
revenue, which is primarily a result of an increase in our total estimated costs
expected to complete our single performance obligation driven by our active
enrollment of patients in our open-label study for SER-109 in order to expand
the safety database to meet the FDA guidance of at least 300 patients and
SER-287 clinical development activity being adversely impacted by the COVID-19
pandemic. This decrease was partially off-set by cumulative catch-up revenue of
$4.6 million associated with the increase of $10.0 million to the transaction
price related to the milestone payment we are entitled to receive from NHS for
initiating the SER-301 Phase 1b study. Additionally, there was a $2.1 million
decrease in the revenue associated with the Research Agreement due to the
curtailment of preclinical research activities contemplated under the original
research plan in the second quarter of 2020. This is off-set by an increase of
$1.3 million in grant revenue.

Research and Development Expenses





                                                  Three Months Ended September 30,
                                                     2020                  2019             Change
                                                                   (in thousands)
Microbiome therapeutics platforms               $        12,456       $        10,861     $    1,595
SER-109                                                   5,668                 2,829          2,839
SER-287                                                   3,870                 4,430           (560 )
Early stage programs                                      1,867                   197          1,670
Total research and development expenses         $        23,861       $        18,317     $    5,544




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Research and development expenses were $23.9 million for the three months ended September 30, 2020, compared to $18.3 million for the three months ended September 30, 2019. The increase of $5.5 million was due primarily to the following:

• an increase of $1.6 million in research expenses related to our microbiome

therapeutics platform due primarily to employee related costs;

• an increase of $2.8 million in expenses related to our SER-109 program due

primarily to an increase in sequencing work of $1.1 million, an increase


        in employee related costs of $0.8 million, an increase in contract
        manufacturing of $0.7 million, and an increase in facility expenses of
        $0.2 million;


    •   a decrease of $0.6 million in expenses for our SER-287 program due
        primarily to a decrease in contract manufacturing of $0.8 million, a
        decrease in clinical trial consulting expense of $0.3 million, and

partially offset by an increase in employee related costs of $0.5 million;

and

• an increase of $1.7 million in expenses for our early stage programs due


        primarily to an increase in clinical trials consulting expense of $1.4
        million and an increase in facility expenses of $0.2 million.



General and Administrative Expenses





                                                    Three Months Ended September 30,
                                                      2020                     2019             Change
                                                                     (in thousands)
Personnel related (including stock-based
compensation)                                   $          2,659         $          2,103     $      556
Professional fees                                          3,354                    2,406            948
Facility-related and other                                 1,538                    1,388            150

Total general and administrative expenses $ 7,551 $


        5,897     $    1,654

General and administrative expenses were $7.6 million for the three months ended September 30, 2020, compared to $5.9 million for the three months ended September 30, 2019. The increase of $1.7 million was primarily due to the following:

• an increase in personnel related costs of $0.6 million primarily related

to an increase in salaries and related payroll taxes;

• an increase in professional fees of $0.9 million is primarily due to an

increase in consulting fees; and

• an increase in facility-related and other costs of $0.2 million primarily

due to an increase in IT-related expenses

Other Income (Expense), Net



Other income (expense), net for the three months ended September 30, 2020 and
2019 was $(0.3) million and $0.8 million, respectively. The decrease is
primarily due to an increase in interest expense of $0.7 million and a decrease
of interest income of $0.2 million.

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Comparison of the Nine Months Ended September 30, 2020 and September 30, 2019

The following table summarizes our results of operations for the nine months ended September 30, 2020 and 2019:





                                           Nine Months Ended
                                             September 30,
                                          2020          2019         Change
                                                   (in thousands)
Revenue:
Collaboration revenue - related party   $  10,728     $  21,909     $ (11,181 )
Grant revenue                               2,907           791         2,116
Collaboration revenue                       2,016         4,183        (2,167 )
Total revenue                              15,651        26,883       (11,232 )
Operating expenses:
Research and development                   65,703        59,109         6,594
General and administrative                 20,180        18,966         1,214
Restructuring expenses                          -         1,492        (1,492 )
Total operating expenses                   85,883        79,567         6,316
Loss from operations                      (70,232 )     (52,684 )     (17,548 )
Other income (expense):
Interest income                               333           744          (411 )
Interest expense                           (2,165 )           -        (2,165 )
Other income                                1,189           439           750
Total other income (expense), net            (643 )       1,183        (1,826 )
Net loss                                $ (70,875 )   $ (51,501 )   $ (19,374 )




Revenue

Total revenue was $15.7 million and $26.9 million for the nine months ended
September 30, 2020 and 2019, respectively. The revenue for the nine months ended
September 30, 2020 relates to $10.7 million recognized under the License
Agreement, $2.9 million for grant revenue and $2.0 million recognized under the
Research Agreement. The revenue for the nine months ended September 30,
2019 principally relates to the recognition of amounts received under the
License Agreement. The decrease of $11.2 million is mainly attributed to a $11.2
million decrease in the License Agreement revenue, which is primarily a result
of an increase in our total estimated costs expected to complete our single
performance obligation driven by our active enrollment of patients in our
open-label study for SER-109 in order to expand the safety database to meet the
FDA guidance of at least 300 patients and SER-287 clinical development activity
being adversely impacted by the COVID-19 pandemic. This decrease was partially
off-set by cumulative catch-up revenue of $4.6 million associated with the
increase of $10.0 million to the transaction price related to the milestone
payment we are entitled to receive from NHS for initiating the SER-301 Phase 1b
study.

Research and Development Expenses





                                            Nine Months Ended
                                              September 30,
                                            2020          2019       Change
                                                    (in thousands)
Microbiome therapeutics platforms         $  36,744     $ 37,684     $  (940 )
SER-109                                      12,199        7,690       4,509
SER-287                                      13,109       12,105       1,004
Early stage programs                          3,651        1,630       2,021

Total research and development expenses $ 65,703 $ 59,109 $ 6,594

Research and development expenses were $65.7 million for the nine months ended September 30, 2020, compared to $59.1 million for the nine months ended September 30, 2019. The increase of $6.6 million was due primarily to the following:

• a decrease of $0.9 million in research expenses related to our microbiome

therapeutics platform, due primarily to a decrease in facility expenses of

$1.4 million and partially offset by an increase in employee related costs

of $0.5 million;

• an increase of $4.5 million in expenses related to our SER-109 program due

primarily to an increase in employee related costs of $1.8 million, an

increase in sequencing costs of $1.1 million, an increase in contract


        manufacturing of $0.8 million, and an increase in facility expenses of
        $0.5 million;


                                       30

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• an increase of $1.0 million in expenses for our SER-287 program due

primarily to an increase in lab services and maintenance of $1.3 million,

an increase in clinical trial consulting expense of $1.2 million, an

increase in employee related costs of $0.5 million, an increase in

sequencing costs of $0.5 million, and partially offset by a decrease in

contract manufacturing of $2.4 million; and

• an increase of $2.0 million in expenses for our early stage programs due

primarily to an increase clinical trials consulting expense of $1.8

million, and an increase in lab service and maintenance of $0.2 million.

General and Administrative Expenses





                                                    Nine Months Ended
                                                      September 30,
                                                   2020            2019          Change
                                                             (in thousands)
Personnel related (including stock-based
compensation)                                   $     7,304     $    7,486     $     (182 )
Professional fees                                     8,676          6,883          1,793
Facility-related and other                            4,200          4,597           (397 )
Total general and administrative expenses       $    20,180     $   18,966     $    1,214

General and administrative expenses were $20.2 million for the nine months ended September 30, 2020 compared to $19.0 million for the nine months ended September 30, 2019. The increase of $1.2 million was primarily due to the following:

• a decrease in personnel related costs of $0.2 million primarily related to


        a decrease in salary costs;


    •   an increase in professional fees of $1.8 million primarily due to an
        increase in consulting; and

• a decrease in facility-related and other costs of $0.4 million primarily

due to a decrease in IT-related expenses.

Restructuring

There were no restructuring charges for the nine months ended September 30, 2020. There were $1.5 million of restructuring charges for the nine months ended September 30, 2019 related to the corporate restructuring discussed above.

Other Income (Expense), Net



Other income (expense), net for the nine months ended September 30, 2020 and
2019 was $(0.6) million and $1.2 million, respectively. The decrease is
primarily due to an increase in interest expense of $2.2 million and partially
offset by an increase in other income of $0.8 million primarily related to our
sublease.



                        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 the Company's 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 sales agreement, 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 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
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 September 30, 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%.

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As of September 30, 2020, we had cash, cash equivalents and short- and long-term
investments totaling $320.3 million and an accumulated deficit of $530.5
million. Based on our current plans and forecasted expenses, we believe that our
cash, cash equivalents and investments as of September 30, 2020 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 unaudited
condensed consolidated financial statements included elsewhere in this Quarterly
Report on Form 10-Q, subject to compliance with the conditions and covenants of
our Loan and Security Agreement with Hercules Capital, Inc. 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 Agreements

Agreement with NHS



In January 2016, we entered into the License Agreement, 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, NHS agreed to pay us an upfront cash payment of $120.0
million, which we received in February 2016. NHS 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 NHS Collaboration Products in
markets outside of the United States and Canada, or the Licensed Territory. We
have retained full commercial rights to the NHS Collaboration Products with
respect to the United States and Canada, where we plan to build our own
commercial organization. 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 NHS Collaboration Products. The full
potential value of the up-front payment and milestone payments payable by NHS 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
recorded revenue of $20.0 million based on the achievement of this milestone
under the License Agreement. In November 2018, we executed a letter agreement
with NHS, or the Letter Agreement, modifying certain terms of the License
Agreement. Under the Letter Agreement, NHS 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.

For the development of NHS 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 NHS bearing the remaining 33%
of such costs. The Letter Agreement also provides scenarios under which NHS'
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 NHS Collaboration Products for IBD, we agreed to pay the
costs of such activities to support approval in the United States and Canada,
and NHS agreed to bear the cost of such activities to support approval of NHS
Collaboration Products in the Licensed Territory.

With respect to development of NHS 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 NHS Collaboration Products other than SER-109 for CDI. We agreed to pay
67% and NHS agreed to pay 33% of other costs of Phase 3 clinical trials
conducted for NHS Collaboration Products other than SER-109 for CDI under a
global development plan. For other clinical development of NHS Collaboration
Products for CDI, we agreed to pay costs of such development activities to
support approval in the United States and Canada, and NHS agreed to bear the
cost of such activities to support approval of NHS Collaboration Products in the
Licensed Territory.

Agreement with AstraZeneca

In March 2019, we entered into the Research Agreement with 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 has 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 has 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 will become
due on January 4, 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.

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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 April 2020, preclinical research activities contemplated under the original
research plan, in connection with the Research Agreement, were curtailed. We are
in discussions regarding the future scope of translational and clinical
activities to be performed by us under the research plan. We did not perform, or
incur costs, under the single performance obligation this quarter. Therefore, no
revenue was recognized under the Research Agreement for the three months ended
September 30, 2020.

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 Term Loan 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 Term Loan Facility, and
as such, the additional second tranche amount of up to $12.5 million is not
available for us to borrow. The third tranche, which allows us to borrow an
additional $12.5 million, will be available upon Hercules' approval on or prior
to June 30, 2021.

Advances under the Term Loan 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%. We will make interest only payments through December
1, 2021, or extended to June 1, 2022 upon satisfaction of certain milestones,
and will then repay the principal balance and interest of the advances in equal
monthly installments after the interest only period and continuing through
November 1, 2023. We paid Hercules a commitment fee of $0.4 million at the
closing. We may prepay advances under the loan and security agreement with
Hercules, in whole or in part, at any time subject to a prepayment charge equal
to: (a) 3.0 % of amounts so prepaid, if such prepayment occurs during the first
year; (b) 2.0% of the amount so prepaid, if such prepayment occurs during the
second year, and (c) 1.0% of the amount so prepaid, if such prepayment occurs
after the second year. Upon prepayment or repayment of all or any of the term
loans, we will pay (in addition to the prepayment premium) an end of term charge
of 4.85% of the aggregate funded amount under the Term Loan Facility.

The Term Loan 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 Term Loan 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. The Term Loan Facility also includes a liquidity covenant
that commences either October 31, 2020, or December 31, 2020 based upon our
satisfying certain performance milestones. If our market capitalization exceeds
$350.0 million, we do not have to comply with the liquidity covenant if such
covenant is required.

The Term Loan 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, 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 September 30, 2020 and December 31, 2019 , the outstanding principal under
the Term Loan Facility was $25.0 million and $24.6 million, respectively. For a
further description of the Term Loan Facility, see Note 8 to our unaudited
condensed consolidated financial statements included elsewhere in this Quarterly
Report on Form 10-Q.

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Cash Flows



The following table summarizes our sources and uses of cash for each of the
periods presented:



                                                           Nine Months Ended
                                                             September 30,
                                                          2020          2019
                                                            (in thousands)
Cash used in operating activities                       $ (75,683 )   $ (62,473 )
Cash used in investing activities                         (83,556 )     (35,171 )
Cash provided by financing activities                     301,439        

61,121

Net increase (decrease) in cash, cash equivalents and


  restricted cash                                       $ 142,200     $ (36,523 )




Operating Activities

During the nine months ended September 30, 2020, operating activities used $75.7
million of cash, primarily due to a net loss of $70.9 million and cash used from
changes in our operating assets and liabilities of $17.9 million, partially
offset by non-cash charges of $13.1 million. Net cash used for changes in our
operating assets and liabilities during the nine months ended September 30, 2020
consisted of an increase in prepaid expenses and other current assets of $3.1
million, an increase in accounts receivable of $1.6 million, a decrease in
deferred revenue of $11.9 million, an increase in accounts payable of $1.0
million, a decrease in operating lease liabilities of $3.3 million and an
increase in accrued expenses and other current liabilities of $0.9 million. The
increase in prepaid expenses is due to timing of payments to vendors. The
increase in accounts receivable is due to our reimbursable costs per our
agreements. The decrease in deferred revenue was primarily due to the
recognition of collaboration revenue. The increase in accounts payable was due
to the timing of payments. The decrease in operating lease liabilities was due
to the cash payment of lease obligations.

During the nine months ended September 30, 2019, operating activities used $62.5
million of cash, primarily due to a net loss of $51.5 million and cash used from
changes in our operating assets and liabilities of $24.6 million, partially
offset by non-cash charges of $13.6 million. Net cash used for changes in our
operating assets and liabilities during the nine months ended September 30, 2019
consisted of a decrease in prepaid expenses and other current assets of $2.8
million, an increase in accounts receivable of $1.7 million, a decrease in
deferred revenue of $17.7 million, a decrease in accounts payable of $1.9
million, a decrease in operating lease liabilities of $3.2 million, and a
decrease in accrued expenses and other current liabilities of $2.9 million. The
decrease in prepaid expenses and other current liabilities is due to
amortization. The increase in accounts receivable is primarily due to our
reimbursable costs per our agreements. The decrease in deferred revenue was due
to the recognition of collaboration revenue. The decrease in accounts payable
and accrued expenses and other current liabilities was due to the timing of
payments. The decrease in operating lease liabilities was due to the cash
payment of lease obligations.

Investing Activities

During the nine months ended September 30, 2020, net cash used in investing activities was $83.6 million, consisting maturities of investments of $42.8 million, partially offset by purchases of investments of $126.0 million and purchases of property and equipment of $0.4 million.

During the nine months ended September 30, 2019, net cash used in investing activities was $35.2 million, consisting of purchases of investments of $34.4 million and purchases of property and equipment of $0.8 million.

Financing Activities



During the nine months ended September 30, 2020, net cash provided by financing
activities was $301.4 million, consisting of $244.0 million in proceeds from our
follow-on public offering of common stock, net of commissions, underwriting
discounts and offering costs, $20.0 million in proceeds from the concurrent
placement, net of issuance costs, $12.1 million from the issuance of common
stock and exercise of stock options, $24.8 million from the issuance of common
stock under the 2019 and 2020 Sales Agreements, and $0.5 million in connection
with the issuance of common stock under our ESPP plan.

During the nine months ended September 30, 2019, net cash provided by financing
activities was $61.1 million, consisting of $60.5 million in proceeds from our
public offering of common stock, net of commissions, underwriting discounts and
offering costs, $0.3 million in connection with the issuance of common stock
under our ESPP plan and $0.2 million from the issuance of common stock and
exercise of stock options.

                                       34

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Funding Requirements



Our expenses may increase substantially in connection with our ongoing clinical
development activities and our research and development activities. 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 the prevention of recurrent CDI;

• continue the clinical development of SER-287 in our Phase 2b clinical


        trial for the treatment of UC;


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

• continue the clinical development of SER-401 in our Phase 1b clinical

trial for use with checkpoint inhibitors in patients with metastatic

melanoma;

• conduct research and initiate clinical development of SER-155 for the


        prevention of mortality due to GvHD in immunocompromised patients,
        including 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 product candidates, 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;

• 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 pre-clinical 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.

                                       35

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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 Quarterly Report on Form 10-Q as this continues to evolve
globally. See "Impact of Novel Coronavirus" above and "Risk Factors-Risks
Related to Our Operations-The COVID-19 pandemic caused by the novel strain of
coronavirus 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 II, Item 1A of this Quarterly Report
on Form 10-Q for a further discussion of the possible impact of the COVID-19
pandemic on our business.

Contractual Obligations and Commitments

The disclosure of our contractual obligations and commitments was included in our Annual Report. There have been no material changes from the contractual commitments and obligations previously disclosed in our Annual Report.

Off-Balance Sheet Arrangements

As of September 30, 2020, we did not have any off-balance sheet arrangements as defined in the rules and regulations of the SEC.

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