Form 4: Seres Therapeutics Executive Sells Shares
Insider Transaction (Form 4)
Matthew R Henn, See Remarks of Seres Therapeutics, Inc., sold 81 shares of common stock on August 15, 2026 for $4.55 per share.
Summary
- Option exercise/conversion: acquired 238 Common Stock on August 15, 2026; holds 8,076 after (Direct).
- Open-market sale: disposed of 81 Common Stock at $4.55 ($369) on August 17, 2026; holds 7,995 after (Direct).
- Option exercise/conversion: disposed of 140 Restricted Stock Units on August 15, 2026; holds 282 after (Direct).
- Option exercise/conversion: disposed of 98 Restricted Stock Units on August 15, 2026; holds 585 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $369 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Matthew R Henn — Officer (See Remarks)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-08-15 | Option exercise/conversion | Common Stock | 238 | — | — | 8,076 |
| 2026-08-17 | Open-market sale | Common Stock | 81 | $5 | $369 | 7,995 |
| 2026-08-15 | Option exercise/conversion | Restricted Stock Units | 140 | — | — | 282 |
| 2026-08-15 | Option exercise/conversion | Restricted Stock Units | 98 | — | — | 585 |
Key Dates
| Date | Description |
|---|---|
| 2026-08-15 | Option exercise/conversion (238 shares) |
| 2026-08-17 | Open-market sale (81 shares) |
| 2026-08-15 | Option exercise/conversion (140 shares) |
| 2026-08-15 | Option exercise/conversion (98 shares) |
Keywords
insider transaction, Form 4, MCRB, Seres Therapeutics, Inc., bearish, Matthew R Henn
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