Eric D. Shaff
CEO and President at Seres Therapeutics Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Seres Therapeutics Inc., 3 years.
Chief executive roles
Shareholder support
Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.
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Seres Therapeutics Inc. April 10, 202561.0%
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Aug 17, 2026 | Seres Therapeutics Inc. | Open-market sale | −263 | $4.55 | $1,197 |
| Aug 15, 2026 | Seres Therapeutics Inc. | Option exercise | +722 | — | — |
| May 18, 2026 | Seres Therapeutics Inc. | Open-market sale | −259 | $7.53 | $1,950 |
| May 15, 2026 | Seres Therapeutics Inc. | Option exercise | +722 | — | — |
| Feb 15, 2026 | Seres Therapeutics Inc. | Option exercise | +723 | — | — |
| Feb 15, 2026 | Seres Therapeutics Inc. | Open-market sale | −259 | $8.47 | $2,194 |
| Nov 15, 2025 | Seres Therapeutics Inc. | Option exercise | +390 | — | — |
| Nov 15, 2025 | Seres Therapeutics Inc. | Option exercise | +331 | — | — |
| Nov 15, 2025 | Seres Therapeutics Inc. | Open-market sale | −217 | $17.30 | $3,754 |
| Aug 18, 2025 | Seres Therapeutics Inc. | Open-market sale | −217 | $16.65 | $3,613 |
| Aug 15, 2025 | Seres Therapeutics Inc. | Option exercise | +391 | — | — |
| Aug 15, 2025 | Seres Therapeutics Inc. | Option exercise | +333 | — | — |
| May 16, 2025 | Seres Therapeutics Inc. | Open-market sale | −220 | $7.28 | $1,602 |
| May 15, 2025 | Seres Therapeutics Inc. | Option exercise | +390 | — | — |
| May 15, 2025 | Seres Therapeutics Inc. | Option exercise | +331 | — | — |
Questions about Eric D. Shaff
What boards is Eric D. Shaff on?
Eric D. Shaff sits on the board of Seres Therapeutics Inc.
What company is Eric D. Shaff the CEO of?
Eric D. Shaff is CEO and President of Seres Therapeutics Inc.
How long has Eric D. Shaff served on boards?
Our records show at least 4 years of board service across 1 board, the earliest from 2023.
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