🕵️ Seaport Therapeutics, Inc. ($SPTX)
SEC insider & ownership activity, last 12 months · CIK 2042347 · every row links its SEC filing
Over the last 12 months insiders bought $20.0M with no open-market selling against it. ARCH Venture Partners XII, LLC bought $19.8M in discretionary trades (May). No red-flag 8-Ks in the window.
Monthly net open-market insider flow, last 12 months (up = net buying)
Insider flow
2 buyers, $20.0M (2 lots) · 0 sellers, $0 (0 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| ARCH Venture Partners XII, LLC | 1 | $19.8M | 0 | – | May 4, 2026 |
| Robert J. Hombach | 1 | $236K | 0 | – | Jun 22, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| Keith Crandell | 11.9% | 13D | May 4, 2026 | filing ↗ | |
| Kristina Burow | 11.9% | 13D | May 4, 2026 | filing ↗ | |
| Robert Nelsen | 11.9% | 13D | May 4, 2026 | filing ↗ | |
| Steven Gillis | 11.9% | 13D | May 4, 2026 | filing ↗ | |
| ARCH Venture Partners XII, LLC | 11.9% | 13D | May 4, 2026 | filing ↗ | |
| ARCH Venture Fund XII, L.P. | 11.9% | 13D | May 4, 2026 | filing ↗ | |
| ARCH Venture Partners XII, L.P. | 11.9% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic (SPV) GP, LLC | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic Partners 100, L.P. | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic (SP), L.P. | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic Partners (LUX) SCSP | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic Genpar, L.P. | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| GAP Coinvestments III, LLC | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| GAP Coinvestments IV, LLC | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| GAP Coinvestments V, LLC | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| GAP Coinvestments CDA, L.P. | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic Genpar (LUX) SCSP | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic (LUX) S.A R.L. | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic Genpar (BERMUDA), L.P. | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| GAP (BERMUDA) L.P. | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| General Atlantic, L.P. | 11.5% | 13D | May 4, 2026 | filing ↗ | |
| The Goldman Sachs Group, Inc. | 5.5% | 13G | May 11, 2026 | filing ↗ | |
| Goldman Sachs & Co. LLC | 5.5% | 13G | May 11, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Earnings (2.02) | Jun 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 8, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | May 4, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 4, 2026 | filing ↗ |