Updated Jul 16, 2026
Henn Matthew R has filed 2 SEC Form 4 filings across 1 company in the last 90 days — selling. Lifetime open-market sales: $28K.
| Date | Ticker | Company | Code | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-19 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 77 | $7.53 | $580 |
| 2026-05-19 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 238 | — | |
| 2026-02-18 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 89 | $8.47 | $754 |
| 2026-02-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 239 | — | |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 1.3K | $17.30 | $22K |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 98 | — | |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 140 | — | |
| 2025-11-18 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 4.0K | — | |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale | 73 | $16.65 | $1K |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 97 | — | |
| 2025-08-15 | MCRB | Seres Therapeutics, Inc. | M — Option exercise | 141 | — | |
| 2024-11-19 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 927 | $0.54 | $501 |
| 2024-11-19 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 2.8K | — | |
| 2024-10-29 | MCRB | Seres Therapeutics, Inc. | S — Open-market sale [10b5-1] | 4.0K | $0.69 | $3K |
| 2024-10-29 | MCRB | Seres Therapeutics, Inc. | M — Option exercise [10b5-1] | 12.6K | $0.00 |
Henn Matthew R 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 ($28K) 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.
Open the live Henn Matthew R profile on InsiderAlpha for real-time alerts, AI-scored trade ideas, and full transaction history.