Across the past 12 months, open-market trades by Seres Therapeutics insiders were all sales, totaling $54,884 (4.06K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Health Ltp Fund General Partner Llc Nutritional | TenPercentOwner | 0 | 585,060 | 585,060 | 85.1% | 07 Jul, 2022 |
| 2 | David Arkowitz | Chief Financial Officer | 20,727 | 0 | 20,727 | 3.0% | 16 Feb, 2024 |
| 3 | Eric D. Shaff | Ceo And President | 17,316 | 0 | 17,316 | 2.5% | 18 Aug, 2026 |
| 4 | Thomas Desrosier | Chief Legal Officer And Evp | 13,344 | 0 | 13,344 | 1.9% | 18 Aug, 2026 |
| 5 | Matthew R Henn | Officer | 10,376 | 0 | 10,376 | 1.5% | 18 Aug, 2026 |
| 6 | Kelly Brady | Officer | 8,679 | 0 | 8,679 | 1.3% | 18 Aug, 2026 |
| 7 | Teresa L. Young | Officer | 8,557 | 0 | 8,557 | 1.2% | 18 Feb, 2026 |
| 8 | David S. Ege | Officer | 8,451 | 0 | 8,451 | 1.2% | 19 Aug, 2024 |
| 9 | Paula Cloghessy | Officer | 3,872 | 0 | 3,872 | 0.6% | 31 Oct, 2023 |
| 10 | Richard N Kender | Director | 3,175 | 0 | 3,175 | 0.5% | 06 Jul, 2022 |
| 11 | Paul Biondi | Director | 2,381 | 0 | 2,381 | 0.3% | 06 Jul, 2022 |
| 12 | Moltke Lisa Von | Officer | 1,994 | 0 | 1,994 | 0.3% | 19 Feb, 2025 |
| 13 | Meryl Zausner | Director | 1,587 | 0 | 1,587 | 0.2% | 06 Jul, 2022 |
| 14 | Willard H Dere | Director | 1,587 | 0 | 1,587 | 0.2% | 06 Jul, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 15 Aug, 2026 | Matthew R Henn | Officer | Acquired M | 238 | — | — | 8,076 | Direct |
| 15 Aug, 2026 | Kelly Brady | Officer | Acquired M | 181 | — | — | 8,743 | Direct |
| 15 Aug, 2026 | Eric D. Shaff | Director | Acquired M | 722 | — | — | 12,762 | Direct |
| 15 Aug, 2026 | Thomas Desrosier | Officer | Acquired M | 245 | — | — | 8,199 | Direct |
| 17 Aug, 2026 | Eric D. Shaff | Director | Disposed S | 263 | $4.55 | $1.20K | 12,499 | Direct |
| 17 Aug, 2026 | Thomas Desrosier | Officer | Disposed S | 82 | $4.55 | $373 | 8,117 | Direct |
| 17 Aug, 2026 | Kelly Brady | Officer | Disposed S | 64 | $4.55 | $291 | 8,679 | Direct |
| 17 Aug, 2026 | Matthew R Henn | Officer | Disposed S | 81 | $4.55 | $369 | 7,995 | Direct |
| 15 Aug, 2026 | Matthew R Henn | Officer | Disposed M | 140 | $0.00 | $0 | 282 | Direct |
| 15 Aug, 2026 | Kelly Brady | Officer | Disposed M | 90 | $0.00 | $0 | 179 | Direct |
| 15 Aug, 2026 | Thomas Desrosier | Officer | Disposed M | 133 | $0.00 | $0 | 265 | Direct |
| 15 Aug, 2026 | Eric D. Shaff | Director | Disposed M | 390 | $0.00 | $0 | 783 | Direct |
| 15 Aug, 2026 | Matthew R Henn | Officer | Disposed M | 98 | $0.00 | $0 | 585 | Direct |
| 15 Aug, 2026 | Kelly Brady | Officer | Disposed M | 91 | $0.00 | $0 | 548 | Direct |
| 15 Aug, 2026 | Eric D. Shaff | Director | Disposed M | 332 | $0.00 | $0 | 1,993 | Direct |
| 15 Aug, 2026 | Thomas Desrosier | Officer | Disposed M | 112 | $0.00 | $0 | 667 | Direct |
| 08 Jul, 2026 | Dennis A Ausiello | Director | Acquired A | 6,500 | $0.00 | $0 | 6,500 | Direct |
| 08 Jul, 2026 | Stephen Berenson | Director | Acquired A | 6,500 | $0.00 | $0 | 6,500 | Direct |
| 08 Jul, 2026 | Kurt Graves | Director | Acquired A | 6,500 | $0.00 | $0 | 6,500 | Direct |
| 08 Jul, 2026 | Claire Fraser | Director | Acquired A | 6,500 | $0.00 | $0 | 6,500 | Direct |