Seres Therapeutics, Inc. SEC filings MCRB
Seres Therapeutics, Inc. has 724 filings in SEC EDGAR's recent list, going back to Jun 9, 2014. Its latest annual report, Form 10-K, was filed on Mar 12, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 4, 2026 (results of operations, regulation fd disclosure). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Jul 8, 2026 |
| 4 | Insider transaction | Jul 2, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 2, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 2, 2026 | Jul 1, 2026 |
| 144 | Notice of proposed sale | May 19, 2026 | — |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 144 | Notice of proposed sale | Mar 17, 2026 | — |
| 4 | Insider transaction | Mar 11, 2026 | Mar 4, 2026 |
| 3 | Initial insider ownership | Mar 11, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 6, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 6, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 6, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Mar 6, 2026 | Mar 4, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Sep 30, 2025 | Sep 26, 2025 |
| 4 | Insider transaction | Aug 19, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 19, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 19, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 19, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 6, 2025 | Aug 5, 2025 |
| 3 | Initial insider ownership | Aug 6, 2025 | Aug 5, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 6, 2025 | — |
| 4 | Insider transaction | Jul 2, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 2, 2025 | Jul 1, 2025 |
| 4 | Insider transaction | Jul 2, 2025 | Jul 1, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jun 6, 2025 | — |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 19, 2025 | May 15, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Apr 11, 2025 | Apr 10, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| 4 | Insider transaction | Feb 19, 2025 | Feb 15, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 12, 2025 | — |
| 4 | Insider transaction | Feb 11, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 11, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 11, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 11, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 11, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 11, 2025 | Feb 7, 2025 |
| 4 | Insider transaction | Feb 6, 2025 | Feb 4, 2025 |
| 3 | Initial insider ownership | Feb 6, 2025 | Feb 4, 2025 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| 4 | Insider transaction | Nov 19, 2024 | Nov 15, 2024 |
| 4 | Insider transaction | Oct 29, 2024 | Oct 27, 2024 |
| 4 | Insider transaction | Oct 29, 2024 | Oct 27, 2024 |
| 4 | Insider transaction | Oct 29, 2024 | Oct 27, 2024 |
| 4 | Insider transaction | Oct 29, 2024 | Oct 27, 2024 |
| 4 | Insider transaction | Oct 29, 2024 | Oct 27, 2024 |
| SC 13D/A | Amended ownership over 5% (active) | Oct 2, 2024 | — |
| 3 | Initial insider ownership | Oct 2, 2024 | Sep 30, 2024 |
| 4 | Insider transaction | Aug 19, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 19, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 19, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 19, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 19, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 19, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 6, 2024 | Aug 3, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | Jul 3, 2024 | Jul 1, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 14, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
| 4 | Insider transaction | May 17, 2024 | May 15, 2024 |
| 4 | Insider transaction | Apr 8, 2024 | Apr 4, 2024 |
| 4 | Insider transaction | Apr 8, 2024 | Apr 4, 2024 |
| 4 | Insider transaction | Apr 8, 2024 | Apr 4, 2024 |
| 4 | Insider transaction | Apr 8, 2024 | Apr 4, 2024 |
| 4 | Insider transaction | Apr 8, 2024 | Apr 4, 2024 |
| 4 | Insider transaction | Apr 8, 2024 | Apr 4, 2024 |
| 4 | Insider transaction | Apr 8, 2024 | Apr 4, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Apr 5, 2024 | — |
| 4 | Insider transaction | Mar 27, 2024 | Mar 25, 2024 |
| 3 | Initial insider ownership | Mar 27, 2024 | Mar 25, 2024 |
| 4 | Insider transaction | Feb 16, 2024 | Feb 14, 2024 |
| 4 | Insider transaction | Feb 16, 2024 | Feb 14, 2024 |
| 4 | Insider transaction | Feb 16, 2024 | Feb 14, 2024 |
| 4 | Insider transaction | Feb 16, 2024 | Feb 14, 2024 |
| 4 | Insider transaction | Feb 16, 2024 | Feb 14, 2024 |
| 4 | Insider transaction | Feb 16, 2024 | Feb 14, 2024 |
| 4 | Insider transaction | Feb 16, 2024 | Feb 14, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Jan 29, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 7, 2023 | — |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Oct 31, 2023 | Oct 27, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| 4 | Insider transaction | Jun 23, 2023 | Jun 22, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | May 10, 2023 | — |
| 4 | Insider transaction | May 1, 2023 | Apr 27, 2023 |
| 4 | Insider transaction | May 1, 2023 | Apr 27, 2023 |
| 4 | Insider transaction | May 1, 2023 | Apr 27, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Apr 6, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| 4 | Insider transaction | Feb 7, 2023 | Feb 3, 2023 |
| 4 | Insider transaction | Feb 7, 2023 | Feb 3, 2023 |
| 4 | Insider transaction | Feb 7, 2023 | Feb 3, 2023 |
| 4 | Insider transaction | Feb 7, 2023 | Feb 3, 2023 |
| 4 | Insider transaction | Feb 7, 2023 | Feb 3, 2023 |
| 4 | Insider transaction | Feb 7, 2023 | Feb 3, 2023 |
| 4 | Insider transaction | Feb 7, 2023 | Feb 3, 2023 |
| 4 | Insider transaction | Feb 7, 2023 | Feb 3, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 3, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Feb 3, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 1, 2023 | — |
| 4 | Insider transaction | Jan 5, 2023 | Jan 4, 2023 |
| 3 | Initial insider ownership | Jan 5, 2023 | Jan 4, 2023 |
| 4 | Insider transaction | Oct 31, 2022 | Oct 27, 2022 |
| 4 | Insider transaction | Oct 31, 2022 | Jun 15, 2022 |
| 4 | Insider transaction | Sep 9, 2022 | Sep 8, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Aug 9, 2022 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jul 22, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jul 11, 2022 | — |
| SC 13D/A | Amended ownership over 5% (active) | Jul 7, 2022 | — |
| 3 | Initial insider ownership | Jul 7, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 7, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jul 6, 2022 | Jul 5, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| 4 | Insider transaction | Jun 24, 2022 | Jun 22, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 11, 2022 | — |
| SC 13G | Ownership over 5% (passive) | Feb 10, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2022 | — |
| 4 | Insider transaction | Feb 8, 2022 | Feb 7, 2022 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Pharmaceutical Preparations (SIC 2834)
- Listed as
- MCRB (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Cambridge, MA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1609809
- Former names
- Seres Therapeutics, Inc. (until Nov 4, 2026); Seres Health, Inc. (until May 14, 2015)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.