17 insiders reported 36 Form 4 transactions for Seaport Therapeutics, Inc. (SPTX) over the past 18 months (most recent 2026-06-24). Recent activity: HOMBACH ROBERT J. (Director) Buy 13,000 shares, PureTech LYT, Inc. (10% Owner) Buy 12.7M shares, PureTech Health plc (10% Owner) Buy 12.7M shares, PureTech LYT, Inc. (10% Owner) Buy 2.7M shares, PureTech Health plc (10% Owner) Buy 2.7M shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-24 | HOMBACH ROBERT J. | Director | Buy | 13,000 | $235,768 |
| 2026-05-06 | PureTech LYT, Inc. | 10% Owner | Buy | 12.7M | $0 |
| 2026-05-06 | PureTech Health plc | 10% Owner | Buy | 12.7M | $0 |
| 2026-05-06 | PureTech LYT, Inc. | 10% Owner | Buy | 2.7M | $0 |
| 2026-05-06 | PureTech Health plc | 10% Owner | Buy | 2.7M | $0 |
| 2026-05-06 | PureTech LYT, Inc. | 10% Owner | Buy | 965,255 | $0 |
| 2026-05-06 | PureTech Health plc | 10% Owner | Buy | 965,255 | $0 |
| 2026-05-04 | Chen Michael Cunyuan | Chief Scientific Officer | Buy | 3,351 | $0 |
| 2026-05-04 | CRANDELL KEITH | 10% Owner | Buy | 2.5M | $0 |
| 2026-05-04 | White Lauren | Chief Financial Officer | Buy | 6,702 | $0 |
| 2026-05-04 | PAUL STEVEN M | Director | Buy | 67,031 | $0 |
| 2026-05-04 | HEALY JAMES | Director | Buy | 1.9M | $0 |
| 2026-05-04 | ARCH Venture Partners XII, L.P. | 10% Owner | Buy | 2.7M | $0 |
| 2026-05-04 | Burow Kristina | 10% Owner | Buy | 2.5M | $0 |
| 2026-05-04 | Gladstein Lana | General Counsel | Buy | 33,515 | $0 |
| 2026-05-04 | ARCH Venture Partners XII, L.P. | 10% Owner | Buy | 2.5M | $0 |
| 2026-05-04 | Loebel Antony | Chief Medical Officer | Buy | 20,109 | $0 |
| 2026-05-04 | Torres Denice | Director | Buy | 13,406 | $0 |
| 2026-05-04 | GILLIS STEVEN | 10% Owner | Buy | 2.5M | $0 |
| 2026-05-04 | ARCH Venture Fund XII, L.P. | 10% Owner | Buy | 2.5M | $0 |
| 2026-05-04 | ARCH Venture Partners XII, LLC | 10% Owner | Buy | 2.5M | $0 |
| 2026-05-04 | GILLIS STEVEN | 10% Owner | Buy | 2.7M | $0 |
| 2026-05-04 | ARCH Venture Fund XII, L.P. | 10% Owner | Buy | 2.7M | $0 |
| 2026-05-04 | ARCH Venture Partners XII, LLC | 10% Owner | Buy | 2.7M | $0 |
| 2026-05-04 | NELSEN ROBERT | 10% Owner | Buy | 2.5M | $0 |
Source: SEC Form 4 filings · as of 2026-06-24