Shaff Eric D. (CIK 1643734) reported 15 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-08-18). Recent activity: Buy MCRB (722 shares), Sell MCRB (263 shares), Buy MCRB (722 shares), Sell MCRB (259 shares), Buy MCRB (723 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-18 | Seres Therapeutics, Inc. (MCRB) | Director | Buy | 722 | $0 |
| 2026-08-18 | Seres Therapeutics, Inc. (MCRB) | Director | Sell | 263 | $1,197 |
| 2026-05-19 | Seres Therapeutics, Inc. (MCRB) | Director | Buy | 722 | $0 |
| 2026-05-19 | Seres Therapeutics, Inc. (MCRB) | Director | Sell | 259 | $1,950 |
| 2026-02-18 | Seres Therapeutics, Inc. (MCRB) | Director | Buy | 723 | $0 |
| 2026-02-18 | Seres Therapeutics, Inc. (MCRB) | Director | Sell | 259 | $2,194 |
| 2025-11-18 | Seres Therapeutics, Inc. (MCRB) | Director | Buy | 390 | $0 |
| 2025-11-18 | Seres Therapeutics, Inc. (MCRB) | Director | Buy | 331 | $0 |
| 2025-11-18 | Seres Therapeutics, Inc. (MCRB) | Director | Sell | 217 | $3,754 |
| 2025-08-19 | Seres Therapeutics, Inc. (MCRB) | Director | Buy | 391 | $0 |
| 2025-08-19 | Seres Therapeutics, Inc. (MCRB) | Director | Buy | 333 | $0 |
| 2025-08-19 | Seres Therapeutics, Inc. (MCRB) | Director | Sell | 217 | $3,613 |
| 2025-05-19 | Seres Therapeutics, Inc. (MCRB) | CEO and President | Buy | 390 | $0 |
| 2025-05-19 | Seres Therapeutics, Inc. (MCRB) | CEO and President | Buy | 331 | $0 |
| 2025-05-19 | Seres Therapeutics, Inc. (MCRB) | CEO and President | Sell | 220 | $1,602 |
Source: SEC Form 4 filings · as of 2026-08-18