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. 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 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. The FDA recently endorsed our plans regarding a rolling BLA submission for SER-109. We intend to begin the BLA rolling submission in the coming weeks, and to complete the BLA submission, including data from the open-label study, in mid-2022. SER-109 has obtained Breakthrough Therapy designation, and as a result, we expect priority review by the FDA. We anticipate a potential SER-109 product launch in the first half of 2023.

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 incidence of gastrointestinal infections, bloodstream infections and graft-versus-host disease, or GvHD. We are also evaluating additional preclinical stage programs to reduce incidence of infections in indications such as cancer neutropenia, solid organ transplant, and reduce antimicrobial resistant infections more broadly.

We continue our research activities in ulcerative colitis, or UC, including evaluating the potential to utilize biomarker-based patient selection and stratification for future studies. 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. In April 2022, we announced our decision not to proceed with the planned SER-301 Phase 1b second study cohort. We continue to conduct analyses of data from our 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 or more of our product candidates. Since our inception, we have incurred significant operating losses. Our net loss was $56.6 million for the three months ended March 31, 2022. As of March 31, 2022, we had an accumulated deficit of $671.0 million and cash, cash equivalents and investments totaling $248.0 million. We expect that our existing cash, cash equivalents and investments will be



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sufficient to fund our operating expenses, capital expenditure requirements and debt service obligations for at least the next 12-months from issuance of our unaudited condensed consolidated financial statements included elsewhere in this Quarterly Report.

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;

continue the clinical development of SER-155 to reduce incidences of gastrointestinal infections, bloodstream infections and GvHD in patients receiving allo-HSCT;

continue translational research activities, informed by the SER-287 Phase 2b and SER-301 Phase 1b study data, to evaluate the potential to utilize biomarker-based patient selection and stratification in future clinical development efforts;

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.



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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. The FDA recently endorsed our plans regarding a rolling BLA submission for SER-109. We intend to begin the BLA rolling submission in the coming weeks, and to complete the BLA submission, including data from the open-label study, in mid-2022. SER-109 has obtained Breakthrough Therapy designation, and as a result, we expect priority review by the FDA. We anticipate a potential SER-109 product launch in the first half of 2023.

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.



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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-? 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 was designed to include approximately 65 subjects with mild-to-moderate UC 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.

In April 2022, we announced our decision not to proceed with the planned SER-301 Phase 1b second study cohort. We continue to conduct analyses of data from our UC clinical stage programs to inform next steps for further development.



                             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 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 two U.S. patent applications have been allowed.



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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.

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, preclinical activities and clinical trials on our behalf as well as contract manufacturing organizations that manufacture drug products for use in our preclinical 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 preclinical 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 preclinical 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.

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, scale up manufacturing operations, seek regulatory approval, and prepare for commercialization of SER-109, continue conducting analyses of data from our UC clinical stage programs to inform next steps for further development, continue to discover and develop additional product candidates, including SER-155 and pursue later stages of clinical development of our product candidates.



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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, commercial, and business development and administrative functions. General and administrative expenses also include professional service fees for marketing and market access activities in preparation for the commercial launch of SER-109; 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 rules 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 11 to our condensed consolidated financial statements.

Other Income (Expense), Net

Interest Income

Interest income consists of interest earned on our cash, cash equivalents and investments.

Interest Expense

Interest expense consists of interest incurred under our loan and security agreement with Hercules.

Other (Expense) Income

Other (expense) income primarily consists of amortization of premiums on investments and 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 months ended March 31, 2022 or 2021.

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, 2021, filed with the SEC on March 1, 2022, 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 months ended March 31, 2022.



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                             Results of Operations

Comparison of Three Months Ended March 31, 2022 and 2021

The following table summarizes our results of operations for the three months ended March 31, 2022 and 2021:



                                                   Three Months Ended
                                                        March 31,
                                                   2022           2021          Change
                                                             (in thousands)
Revenue:
Collaboration revenue - related party           $    1,493     $    4,648     $   (3,155 )
Grant revenue                                            -          1,070         (1,070 )
Total revenue                                        1,493          5,718         (4,225 )
Operating expenses:
Research and development                            39,649         29,303         10,346
General and administrative                          18,571         11,741          6,830
Collaboration (profit) loss sharing - related
party                                                 (976 )            -           (976 )
Total operating expenses                            57,244         41,044         16,200
Loss from operations                               (55,751 )      (35,326 )      (20,425 )
Other (expense) income:
Interest income                                        384            966           (582 )
Interest expense                                      (912 )         (696 )         (216 )
Other expense                                         (345 )         (409 )           64
Total other (expense) income, net                     (873 )         (139 )         (734 )
Net loss                                        $  (56,624 )   $  (35,465 )   $  (21,159 )


Revenue

Total revenue was $1.5 million and $5.7 million for the three months ended March 31, 2022 and 2021, respectively. During the three months ended March 31, 2022, we increased our estimate of the future costs that would be incurred from on-going research and development services to complete our performance obligation under the License Agreement that is recognized over time using an input method. The increase in our estimate of the future costs was based on an update to reflect current and expected future conditions in the labor markets, particularly as it relates to inflation. This update resulted in lower collaboration revenue - related party for the three months ended March 31, 2022, as compared to the same quarter in the prior year. Revenue for the three months ended March 31, 2021 also included $1.1 million of grant revenue related to our CARB-X grant for SER-155. We graduated from the CARB-X program in May 2021 and will receive no additional funding.

Research and Development Expenses


                                                    Three Months Ended
                                                         March 31,
                                                   2022            2021          Change
                                                             (in thousands)
Microbiome therapeutics platforms               $     7,958     $    7,632     $      326
SER-109                                              11,750          7,726          4,024
SER-287                                                   -          2,937         (2,937 )
Early stage programs                                  1,763            837            926
Total direct research and development
expenses                                             21,471         19,132          2,339
Personnel-related (including stock-based
compensation)                                        18,178         10,171          8,007

Total research and development expenses $ 39,649 $ 29,303 $ 10,346

Research and development expenses were $39.6 million for the three months ended March 31, 2022 and $29.3 million for the three months ended March 31, 2021. The increase of $10.3 million was due primarily to the following:

an increase in personnel-related costs of $8.0 million primarily due to an increase of $7.5 million in salaries, payroll taxes and employee benefit expenses and an increase of $0.5 million in stock-based compensation expense as a result of increased headcount;

an increase of $4.0 million in expenses related to our SER-109 program due primarily to increases in facilities costs, lab supplies, and consumables of $3.1 million and clinical trial consulting expense of $1.1 million;

a decrease of $2.9 million in expenses for our SER-287 program due primarily to a decrease in clinical trial consulting expenses of $3.1 million as we continue to re-evaluate the clinical development of SER-287 in light of clinical study results;



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an increase of $0.9 million in expenses for our early stage programs due primarily to increases in clinical trial consulting expense of $0.3 million, sequencing work costs of $0.3 million, and external consultant costs of $0.3 million; and

an increase of $0.3 million in research expenses related to our microbiome therapeutics platforms, due primarily to an increase in facilities costs, lab supplies, and consumables of $1.5 million, partially offset by a decrease in external consulting expenses of $1.0 million.

General and Administrative Expenses



                                                    Three Months Ended
                                                        March 31,
                                                   2022            2021          Change
                                                             (in thousands)
Personnel related (including stock-based
compensation)                                   $     7,326     $    4,220     $    3,106
Professional fees                                     8,265          5,535          2,730
Facility-related and other                            2,980          1,986            994

Total general and administrative expenses $ 18,571 $ 11,741 $ 6,830

General and administrative expenses were $18.6 million for the three months ended March 31, 2022 compared to $11.7 million for the three months ended March 31, 2021. The increase of $6.8 million was due primarily to the following:

an increase in personnel related costs of $3.1 million due primarily to increases in salaries and related payroll taxes of $1.9 million, employee stock-based compensation expense of $1.0 million and employee bonus expense of $0.2 million;

an increase in professional fees of $2.7 million primarily due to increases in professional services and consulting fees, including an increase of $0.3 million in pre-launch commercial expenses;

an increase in facility-related and other costs of $1.0 million due primarily to increases in lab and office supplies of $0.8 million and IT-related expenses of $0.2 million.

Collaboration (Profit) Loss Sharing - related party

Collaboration (profit) loss sharing - related party was $1.0 million of income to us for the three months ended March 31, 2022. There was no collaboration (profit) loss sharing - related party for the three months ended March 31, 2021. For the three months ended March 31, 2022 we incurred $4.1 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 $2.1 million of pre-launch expenses for the three months ended March 31, 2022. Therefore, the $1.0 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 for the three months ended March 31, 2022 and 2021 was $0.9 million of expense and $0.1 million of expense, respectively. The increase in other (expense) income, net was primarily due to an increase in interest expense of $0.2 million and a decrease in interest income of $0.6 million.



                        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 May 2021, we entered into a Sales Agreement, or the Sales Agreement, with Cowen and Company, LLC, or Cowen, to sell shares of our common stock, with aggregate gross sales proceeds of up to $150,000, from time to time, through an "at the market" equity offering program under which Cowen acts as sales agent. As of March 31, 2022, we have not sold any shares of common stock under the Sales Agreement.

As of March 31, 2022, we had cash, cash equivalents and investments totaling $248.0 million and an accumulated deficit of $671.0 million. Based on our current plans and forecasted expenses, we believe that our cash, cash equivalents and investments as of March 31, 2022 will enable us to fund our operating expenses, capital expenditure requirements, and debt service obligations for at least the next 12 months from the issuance of our unaudited condensed consolidated financial statements included elsewhere in this Quarterly Report. 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.



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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.

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



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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 are 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.

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.

Long Term Manufacturing Agreement with Bacthera

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.



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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.

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 was 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.

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, 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. 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.

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 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 FDA 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 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



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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 New 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.

As of March 31, 2022 and December 31, 2021, the outstanding principal under the New Credit Facility was $50.0 million and $24.1 million, respectively. For a further description of the New Credit Facility, see Note 8 to our unaudited condensed consolidated financial statements included elsewhere in this Quarterly Report.

Cash Flows



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

                                                        Three Months Ended March 31,
                                                          2022                 2021
                                                               (in thousands)
Cash used in operating activities                    $      (66,445 )     $      (29,496 )
Cash provided by (used in) investing activities              12,972              (20,738 )
Cash provided by financing activities                        26,848                  764
Net decrease in cash, cash equivalents and
restricted cash                                      $      (26,625 )     $      (49,470 )




Operating Activities

During the three months ended March 31, 2022, operating activities used $66.4 million of cash, primarily due to a net loss of $56.6 million and changes in our operating assets and liabilities of $17.0 million, partially offset by non-cash charges of $7.2 million. Non-cash charges consisted of stock-based compensation expense of $5.1 million, $1.1 million related to the amortization of right-of-use assets, $1.6 million of depreciation, and $0.3 million of net amortization of premiums related to our investments, partially offset by collaboration profit sharing of $1.0 million related to the license and collaboration agreement with Nestlé. Changes in our operating assets and liabilities during the three months ended March 31, 2022 consisted of a decrease in accrued expenses and other current and long-term liabilities of $3.7 million, a decrease in accounts payable of $6.5 million, a decrease in deferred revenue of $1.5 million, an increase in prepaid expenses and other current and long-term assets of $3.8 million and a decrease in operating lease liabilities of $1.5 million.



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During the three months ended March 31, 2021, operating activities used $29.5 million of cash, primarily due to a net loss of $35.5 million and changes in our operating assets and liabilities of $0.8 million, partially offset by non-cash charges of $6.7 million. Non-cash charges consisted of stock-based compensation expense of $3.6 million, $0.7 million related to the amortization of right-of-use assets, $1.5 million of depreciation, and $0.9 million of net amortization of premiums related to our investments. Net cash used in our operating assets and liabilities during the three months ended March 31, 2021 consisted of an increase in prepaid expenses and other current and long-term assets of $1.4 million, and decreases in deferred revenue of $4.6 million, operating lease liabilities of $1.2 million and accrued expenses and other current liabilities of $1.2 million, partially offset by a decrease in accounts receivable of $6.8 million and an increase in accounts payable of $1.0 million. The increase in prepaid expenses and other current and long-term assets was due to timing of payments to vendors. The decrease in accounts receivable is due to our receipt of receivables due during the quarter. The decrease in deferred revenue was primarily due to the recognition of collaboration revenue. The decrease 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.

Investing Activities

During the three months ended March 31, 2022, net cash provided by investing activities was $13.0 million, consisting of sales and maturities of investments of $44.1 million, partially offset by purchases of investments of $28.2 million and purchases of property and equipment of $3.0 million.

During the three months ended March 31, 2021, net cash used in investing activities was $20.7 million, consisting of purchases of investments of $46.9 million and purchases of property and equipment of $1.3 million, partially offset by maturities of investments of $27.5 million.

Financing Activities

During the three months ended March 31, 2022, net cash provided by financing activities was $26.8 million, consisting of $27.6 million of proceeds received from the New Credit Facility with Hercules, net of issuance costs, $0.3 million from the issuance of common stock associated with the exercise of stock options, and $0.9 million in connection with the issuance of common stock under our 2015 Employee Stock Purchase Plan, or ESPP, partially offset by principal payments under the Original Credit Facility of $1.9 million.

During the three months ended March 31, 2021, net cash provided by financing activities was $0.8 million, consisting of $0.4 million in connection with the issuance of common stock under our ESPP and $0.4 million from the issuance of common stock associated with the exercise of stock options.

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, seek regulatory approval, and prepare for commercialization of SER-109 for patients with recurrent CDI;

continue the clinical development of SER-155 to reduce incidences of gastrointestinal infections, bloodstream infections and GvHD in patients receiving allo-HSCT;

continue translational research activities, informed by the SER-287 Phase 2b and SER-301 Phase 1b study data, to evaluate the potential to utilize biomarker-based patient selection and stratification in future clinical development efforts;

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



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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 preclinical 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 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 Quarterly Report 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 II, Item 1A of this Quarterly Report 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.

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