🕵️ Seres Therapeutics, Inc. ($MCRB)
SEC insider & ownership activity, last 12 months · CIK 1609809 · every row links its SEC filing
Over the last 12 months insiders sold $60K with no open-market buying against it. Matthew R. Henn sold $24K through a 10b5-1 trading plan in 4 lots (Aug–May). 1 planned sale is pending, the largest $1K (Teresa L Young). No red-flag 8-Ks in the window.
🚨 1 signal active —
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Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
0 buyers, $0 (0 lots) · 5 sellers, $60K (16 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Matthew R. Henn | 0 | – | 4 | $24K | May 18, 2026 |
| Teresa L Young | 0 | – | 3 | $20K | Feb 15, 2026 |
| Eric D. Shaff | 0 | – | 4 | $12K | May 18, 2026 |
| Desrosier Thomas | 0 | – | 4 | $4K | May 18, 2026 |
| Brady Kelly | 0 | – | 1 | $444 | May 18, 2026 |
5%+ holders
No current 5%+ beneficial-ownership positions on file.
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Teresa L Young | $1K | May 19, 2026 | filing ↗ |
| Teresa L Young | $78K | Mar 17, 2026 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Officer/director changes (5.02) | Jul 8, 2026 | filing ↗ |
| Shareholder vote (5.07) | Jul 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 8, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jul 8, 2026 | filing ↗ |
| Other events (8.01) | Jul 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jul 8, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 2, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 2, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 2, 2026 | filing ↗ |
| Officer/director changes (5.02) | May 30, 2026 | filing ↗ |
| Earnings (2.02) | May 5, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 5, 2026 | filing ↗ |
| Other events (8.01) | Mar 16, 2026 | filing ↗ |
| Earnings (2.02) | Mar 12, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 12, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 12, 2026 | filing ↗ |
| Officer/director changes (5.02) | Feb 27, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Feb 27, 2026 | filing ↗ |
| Earnings (2.02) | Nov 5, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Nov 5, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Nov 5, 2025 | filing ↗ |
| Other events (8.01) | Sep 23, 2025 | filing ↗ |
| Earnings (2.02) | Aug 6, 2025 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 6, 2025 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 6, 2025 | filing ↗ |