The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
| Date | Insider | Role | Action | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 17, 2026 | DesRosier Thomas | See Remarks | Sell(S) | 82 | $4.55 | $373 |
| Aug 17, 2026 | Henn Matthew R | See Remarks | Sell(S) | 81 | $4.55 | $369 |
| Aug 17, 2026 | Shaff Eric D. | Director | Sell(S) | 263 | $4.55 | $1K |
| Aug 17, 2026 | Brady Kelly | See Remarks | Sell(S) | 64 | $4.55 | $291 |
| Aug 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 112 | — | $0 |
| Aug 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 133 | — | $0 |
| Aug 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 245 | — | — |
| Aug 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 98 | — | $0 |
| Aug 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 140 | — | $0 |
| Aug 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 238 | — | — |
| Aug 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 332 | — | $0 |
| Aug 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 390 | — | $0 |
| Aug 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 722 | — | — |
| Aug 15, 2026 | Brady Kelly | See Remarks | Option exercise(M) | 91 | — | $0 |
| Aug 15, 2026 | Brady Kelly | See Remarks | Option exercise(M) | 90 | — | $0 |
| Aug 15, 2026 | Brady Kelly | See Remarks | Option exercise(M) | 181 | — | — |
| Jul 8, 2026 | Dere Willard H | Director | Grant(A) | 7K | — | $0 |
| Jul 8, 2026 | Ausiello Dennis A | Director | Grant(A) | 7K | — | $0 |
| Jul 8, 2026 | Shaff Eric D. | Director | Grant(A) | 7K | — | $0 |
| Jul 8, 2026 | Graves Kurt | Director | Grant(A) | 7K | — | $0 |
| Jul 8, 2026 | Kender Richard N | See Remarks, Director | Grant(A) | 50K | — | $0 |
| Jul 8, 2026 | Henn Matthew R | See Remarks | Grant(A) | 25K | — | $0 |
| Jul 8, 2026 | Thorell Marella | See Remarks | Grant(A) | 8K | — | $0 |
| Jul 8, 2026 | Fraser Claire | Director | Grant(A) | 7K | — | $0 |
| Jul 8, 2026 | Rosiello Robert L. | Director | Grant(A) | 7K | — | $0 |
| Jul 8, 2026 | Berenson Stephen | Director | Grant(A) | 7K | — | $0 |
| Jul 8, 2026 | Brady Kelly | See Remarks | Grant(A) | 19K | — | $0 |
| Jul 8, 2026 | DesRosier Thomas | See Remarks | Grant(A) | 8K | — | $0 |
| Jul 1, 2026 | Ausiello Dennis A | Director | Grant(A) | 8K | — | $0 |
| Jul 1, 2026 | Berenson Stephen | Director | Grant(A) | 8K | — | $0 |
| Jul 1, 2026 | Rosiello Robert L. | Director | Grant(A) | 8K | — | $0 |
| May 18, 2026 | DesRosier Thomas | See Remarks | Sell(S) | 79 | $7.53 | $595 |
| May 18, 2026 | Brady Kelly | See Remarks | Sell(S) | 59 | $7.53 | $444 |
| May 18, 2026 | Henn Matthew R | See Remarks | Sell(S) | 77 | $7.53 | $580 |
| May 18, 2026 | Shaff Eric D. | Director | Sell(S) | 259 | $7.53 | $2K |
| May 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 244 | — | — |
| May 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 133 | — | $0 |
| May 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 111 | — | $0 |
| May 15, 2026 | Brady Kelly | See Remarks | Option exercise(M) | 180 | — | — |
| May 15, 2026 | Brady Kelly | See Remarks | Option exercise(M) | 89 | — | $0 |
| May 15, 2026 | Brady Kelly | See Remarks | Option exercise(M) | 91 | — | $0 |
| May 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 238 | — | — |
| May 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 141 | — | $0 |
| May 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 97 | — | $0 |
| May 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 722 | — | — |
| May 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 391 | — | $0 |
| May 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 331 | — | $0 |
| Mar 4, 2026 | Brady Kelly | See Remarks | Grant(A) | 56K | — | $0 |
| Mar 4, 2026 | DesRosier Thomas | See Remarks | Grant(A) | 23K | — | $0 |
| Mar 4, 2026 | Thorell Marella | See Remarks | Grant(A) | 23K | — | $0 |
| Mar 4, 2026 | Henn Matthew R | See Remarks | Grant(A) | 75K | — | $0 |
| Mar 4, 2026 | Kender Richard N | See Remarks, Director | Grant(A) | 150K | — | $0 |
| Feb 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 239 | — | — |
| Feb 15, 2026 | Henn Matthew R | See Remarks | Sell(S) | 89 | $8.47 | $754 |
| Feb 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 141 | — | $0 |
| Feb 15, 2026 | Henn Matthew R | See Remarks | Option exercise(M) | 98 | — | $0 |
| Feb 15, 2026 | DesRosier Thomas | See Remarks | Sell(S) | 78 | $8.47 | $661 |
| Feb 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 244 | — | — |
| Feb 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 133 | — | $0 |
| Feb 15, 2026 | DesRosier Thomas | See Remarks | Option exercise(M) | 111 | — | $0 |
| Feb 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 723 | — | — |
| Feb 15, 2026 | Shaff Eric D. | Director | Sell(S) | 259 | $8.47 | $2K |
| Feb 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 391 | — | $0 |
| Feb 15, 2026 | Shaff Eric D. | Director | Option exercise(M) | 333 | — | $0 |
| Feb 15, 2026 | Young Teresa L. | See Remarks | Option exercise(M) | 231 | — | — |
| Feb 15, 2026 | Young Teresa L. | See Remarks | Sell(S) | 75 | $8.47 | $635 |
| Feb 15, 2026 | Young Teresa L. | See Remarks | Option exercise(M) | 98 | — | $0 |
| Feb 15, 2026 | Young Teresa L. | See Remarks | Option exercise(M) | 133 | — | $0 |
| Nov 15, 2025 | Henn Matthew R | See Remarks | Sell(S) | 1K | $17.30 | $22K |
| Nov 15, 2025 | Henn Matthew R | See Remarks | Option exercise(M) | 98 | — | — |
| Nov 15, 2025 | Henn Matthew R | See Remarks | Option exercise(M) | 4K | — | — |
| Nov 15, 2025 | Henn Matthew R | See Remarks | Option exercise(M) | 140 | — | — |
| Nov 15, 2025 | Henn Matthew R | See Remarks | Option exercise(M) | 4K | — | $0 |
| Nov 15, 2025 | Henn Matthew R | See Remarks | Option exercise(M) | 140 | — | $0 |
| Nov 15, 2025 | Henn Matthew R | See Remarks | Option exercise(M) | 98 | — | $0 |
| Nov 15, 2025 | Shaff Eric D. | Director | Sell(S) | 217 | $17.30 | $4K |
| Nov 15, 2025 | Shaff Eric D. | Director | Option exercise(M) | 331 | — | — |
| Nov 15, 2025 | Shaff Eric D. | Director | Option exercise(M) | 390 | — | — |
| Nov 15, 2025 | Shaff Eric D. | Director | Option exercise(M) | 331 | — | $0 |
| Nov 15, 2025 | Shaff Eric D. | Director | Option exercise(M) | 390 | — | $0 |
| Nov 15, 2025 | Young Teresa L. | See Remarks | Sell(S) | 1K | $17.30 | $18K |
| Nov 15, 2025 | Young Teresa L. | See Remarks | Option exercise(M) | 4K | — | — |
| Nov 15, 2025 | Young Teresa L. | See Remarks | Option exercise(M) | 98 | — | — |
| Nov 15, 2025 | Young Teresa L. | See Remarks | Option exercise(M) | 132 | — | — |
| Nov 15, 2025 | Young Teresa L. | See Remarks | Option exercise(M) | 132 | — | $0 |
| Nov 15, 2025 | Young Teresa L. | See Remarks | Option exercise(M) | 98 | — | $0 |
| Nov 15, 2025 | Young Teresa L. | See Remarks | Option exercise(M) | 4K | — | $0 |
| Nov 15, 2025 | DesRosier Thomas | See Remarks | Option exercise(M) | 132 | — | — |
| Nov 15, 2025 | DesRosier Thomas | See Remarks | Option exercise(M) | 112 | — | — |
| Nov 15, 2025 | DesRosier Thomas | See Remarks | Sell(S) | 76 | $17.30 | $1K |
| Nov 15, 2025 | DesRosier Thomas | See Remarks | Option exercise(M) | 112 | — | $0 |
| Nov 15, 2025 | DesRosier Thomas | See Remarks | Option exercise(M) | 132 | — | $0 |
| Sep 26, 2025 | Henn Matthew R | See Remarks | Grant(A) | 4K | — | $0 |
| Sep 26, 2025 | Young Teresa L. | See Remarks | Grant(A) | 4K | — | $0 |
| Aug 18, 2025 | Henn Matthew R | See Remarks | Sell(S) | 73 | $16.65 | $1K |
| Aug 18, 2025 | Shaff Eric D. | Director | Sell(S) | 217 | $16.65 | $4K |
| Aug 18, 2025 | Young Teresa L. | See Remarks | Sell(S) | 59 | $16.65 | $982 |
| Aug 18, 2025 | DesRosier Thomas | See Remarks | Sell(S) | 76 | $16.65 | $1K |
| Aug 15, 2025 | Henn Matthew R | See Remarks | Option exercise(M) | 97 | — | — |
| Aug 15, 2025 | Henn Matthew R | See Remarks | Option exercise(M) | 141 | — | — |
Insider transactions sourced from SEC EDGAR Form 4 filings, normalized within minutes of acceptance. "Buy"/"Sell" mark open-market transactions (codes P/S), the tradeable signal. Awards, option exercises and tax-withholding are shown with their raw code. All data is public domain.
Issuer: Seres Therapeutics, Inc., SEC CIK 0001609809. The symbol on a Form 4 is typed by the filer, so this page follows the issuer with the newest filing under MCRB and shows every filing by that issuer.
Coverage: Form 4 filings indexed 2006-01-02 → 2026-09-12. Earlier history is backfilling; this window widens as it deepens.
Programmatic access via the Arkolith API & MCP server (insider.transactions, insider.company).
Connected pages for MCRB