Updated Jul 16, 2026
Shaff Eric D. has filed 2 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $19K.
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-19 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 259 | $7.53 | $2K |
| 2026-05-19 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 722 | — | |
| 2026-02-18 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 259 | $8.47 | $2K |
| 2026-02-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 723 | — | |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 217 | $17.30 | $4K |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 331 | — | |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 390 | — | |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 217 | $16.65 | $4K |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 333 | — | |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 391 | — | |
| 2024-11-19 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 2.5K | $0.54 | $1K |
| 2024-11-19 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 7.8K | — | |
| 2024-10-29 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 8.7K | $0.69 | $6K |
| 2024-10-29 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 27.8K | $0.00 |
Shaff Eric D. is a corporate insider — currently tracked as Insider of Seres Therapeutics, Inc. (MCRB). InsiderAlpha tracks every SEC Form 4 filing in real time.
2 primary Form 4 filings in the last 90 days, covering 1 company.
Recorded transactions: 0 open-market purchases () and 6 open-market sales ($19K) across all tracked filings.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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