VSTM (Verastem, Inc.)
Insider Trading Activity
Every open-market purchase and sale reported by VSTM officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-05 | Dan Paterson | President and CEO | Sell | — | — |
| 2026-06-24 | Dan Paterson | President and CEO | Sell | — | — |
| 2026-06-24 | Daniel Calkins | Chief Financial Officer | Sell | — | — |
| 2026-05-27 | MICHAEL P BAILEY | Director | A | — | — |
| 2026-05-26 | Anil Kapur | Director | A | — | — |
| 2026-05-26 | Eric K Rowinsky | Director | A | — | — |
| 2026-05-26 | JOHN JOHNSON | Director | A | — | — |
| 2026-05-26 | Paul A. Bunn | Director | A | — | — |
| 2026-05-26 | Brian M Stuglik | Director | A | — | — |
| 2026-05-26 | Karin Anna Tollefson | Director | A | — | — |
| 2026-05-26 | MICHELLE ROBERTSON | Director | A | — | — |
| 2026-05-06 | Dan Paterson | President and CEO | Sell | — | — |
| 2026-03-23 | Daniel Calkins | Chief Financial Officer | A | — | — |
| 2026-02-05 | Dan Paterson | President and CEO | Sell | — | — |
| 2026-01-23 | Daniel Calkins | Chief Financial Officer | A | — | — |
| 2026-01-23 | Dan Paterson | President and CEO | A | — | — |
| 2026-01-14 | Daniel Calkins | Chief Financial Officer | Sell | — | — |
| 2026-01-14 | Dan Paterson | President and CEO | Sell | — | — |
| 2026-01-08 | Michael Kauffman | President of Development | A | — | — |
| 2025-12-29 | Daniel Calkins | Chief Financial Officer | Sell | — | — |
| 2025-12-18 | Brian M Stuglik | Director | Sell | — | — |
| 2025-12-18 | Robert E. Gagnon | Director | Sell | — | — |
| 2025-12-18 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-12-12 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-12-09 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-12-04 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-12-01 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-11-25 | Michael Kauffman | Director | Sell | — | — |
| 2025-11-25 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-11-25 | Paul A. Bunn | Director | MIXED | — | — |
| 2025-11-06 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-10-14 | Paul A. Bunn | Director | Sell | — | — |
| 2025-09-24 | Daniel Calkins | Chief Financial Officer | Sell | — | — |
| 2025-09-18 | Brian M Stuglik | Director | Sell | — | — |
| 2025-09-18 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-09-18 | Robert E. Gagnon | Director | Sell | — | — |
| 2025-08-06 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-06-24 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-06-24 | Daniel Calkins | Chief Financial Officer | Sell | — | — |
| 2025-06-20 | Robert E. Gagnon | Director | Sell | — | — |
| 2025-06-20 | Dan Paterson | President and CEO | Sell | — | — |
| 2025-06-20 | Brian M Stuglik | Director | Sell | — | — |
| 2025-05-27 | MICHELLE ROBERTSON | Director | A | — | — |
| 2025-05-27 | Karin Anna Tollefson | Director | A | — | — |
| 2025-05-27 | Anil Kapur | Director | A | — | — |
| 2025-05-27 | Eric K Rowinsky | Director | A | — | — |
| 2025-05-27 | JOHN JOHNSON | Director | A | — | — |
| 2025-05-27 | Paul A. Bunn | Director | A | — | — |
| 2025-05-27 | Michael Kauffman | Director | A | — | — |
| 2025-05-27 | Brian M Stuglik | Director | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | 10%+ Owner | 1,441,946 | — |
| — | 10%+ Owner | 1,345,171 | — |
| — | 10%+ Owner | 839,020 | — |
| — | President and CEO | 606,034 | — |
| — | 10%+ Owner | 315,815 | — |
| — | Director | 273,081 | — |
| — | 10%+ Owner | 194,093 | — |
| — | Director | 194,093 | — |
| — | Director | 166,270 | — |
| — | 10%+ Owner | 165,344 | — |
| — | Director | 161,111 | — |
| — | — | 161,111 | — |
| — | Director | 137,147 | — |
| — | Chief Financial Officer | 117,295 | — |
| — | Director | 108,000 | — |
| — | Executive Chairman | 65,911 | — |
| — | Director | 54,666 | — |
| — | Director | 52,666 | — |
| — | Director | 52,666 | — |
| — | Director | 52,666 | — |
| — | Director | 52,666 | — |
| — | Chief Operating Officer | 50,000 | — |
| — | Director | 44,333 | — |
| — | Director | 41,678 | — |
| — | President and CEO | 18,853 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the VSTM quote page; the site-wide leaderboard is on the insider transactions hub.