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Seres Therapeutics, Inc.

For the period ended Jun 9, 2026. Filed Apr 27, 2026.

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What shareholders are asked to vote on at a company's meeting. It is where to find what directors and top executives are paid, and who owns the most shares.

Jun 9, 2026 · Filed Apr 27, 2026

MCRB$1.98-5.3%Stored close · as of Nov 6, 2026
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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrant☒ Filed by a Party other than the Registrant☐

Check the appropriate box:

☐Preliminary Proxy Statement
☐Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☒Definitive Proxy Statement
☐Definitive Additional Materials
☐Soliciting Material under § 240.14a-12

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check all boxes that apply)

☒No fee required.
☐Fee paid previously with preliminary materials.
☐Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Seres Therapeutics, Inc.

PROXYSTATEMENT

Annual Meeting of Stockholders June 9, 20268:00 a.m. Eastern Time

To Our Stockholders:

You are cordially invited to attend the 2026 Annual Meeting of Stockholders of Seres Therapeutics, Inc. at 8:00 a.m. Eastern time, on Tuesday, June 9, 2026 (the “Annual Meeting”). The Annual Meeting will be held online. You will be able to attend the Annual Meeting online and submit your questions during the meeting by visiting www.virtualshareholdermeeting.com/MCRB2026.

The Notice of Meeting and Proxy Statement on the following pages describe the matters to be presented at the Annual Meeting. Please see the section called “Who Can Attend the 2026 Annual Meeting of Stockholders?” on page 3 of the proxy statement for more information about how to attend the meeting online.

Whether or not you attend the Annual Meeting webcast, it is important that your shares be represented and voted at the Annual Meeting. Therefore, I urge you to promptly vote and submit your proxy via the Internet or by signing, dating and returning the enclosed proxy card in the enclosed envelope, which requires no postage if mailed in the United States. Instructions regarding how you can vote are contained on the proxy card. You may also vote online during the Annual Meeting. Instructions on how to vote during the meeting will be available at www.virtualshareholdermeeting.com/MCRB2026.

Thank you for your support.

Sincerely,

Richard N. Kender

Executive Chair and Interim Chief Executive Officer

Notice of Annual Meeting of Stockholders
Proxy Statement1
Proposals1
Recommendations of the Board2
Information About This Proxy Statement2
Questions and Answers About the 2026 Annual Meeting of Stockholders3
Proposals to be Voted On7
Proposal 1: Election of Directors7
Proposal 2: Ratification of Appointment of Independent Registered Public Accounting Firm12
Proposal 3: Approval, on an Advisory (Non-Binding) Basis, of the Compensation of Our Named Executive Officers13
Proposal 4: Approval of an Amendment and Restatement of the Seres Therapeutics, Inc. 2025 Incentive Award Plan14
Proposal 5: Approval of an Adjournment of the Annual Meeting23
Report of the Audit Committee of the Board of Directors24
Independent Registered Public Accounting Firm Fees and Other Matters25
Executive Officers26
Corporate Governance28
General28
Board Composition28
Director Independence28
Director Candidates28
Communications from Stockholders29
Board Leadership Structure and Role in Risk Oversight29
Environmental, Social and Corporate Governance Activities30
Annual Board Evaluation31
Code of Ethics31
Insider Trading31
Anti-Hedging and Anti-Pledging Policy31
Clawback Policy31
Attendance by Members of the Board of Directors at Meetings31
Committees of the Board32
Audit Committee32
Compensation and Talent Committee33
Nominating and Corporate Governance Committee33
Science and Clinical Development Committee34
Executive Compensation35
General35
Details of Our Compensation Program36
Executive Compensation Table41
Employment Arrangements44
Pay Versus Performance46
Director Compensation49
2025 Director Compensation Table50
Equity Compensation Plan Information51
Security Ownership of Certain Beneficial Owners and Management52
Certain Relationships54
Compensation and Talent Committee Interlocks and Insider Participation57
Stockholders’ Proposals58
Other Matters59
Solicitation of Proxies60
Appendix A62
Proxy Card76
ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.