VSTM · Insider Trading
Verastem, Inc.
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-02 | Dan Paterson | President and CEO | MIXED | −151,014 | −$352.97K |
| 2026-10-02 | Daniel Calkins | Chief Financial Officer | MIXED | −10,899 | −$20.53K |
| 2026-09-23 | Daniel Calkins | Chief Financial Officer | Sell | −55 | −$424 |
| 2026-08-05 | Dan Paterson | President and CEO | Sell | −1,302 | −$7.56K |
| 2026-06-24 | Dan Paterson | President and CEO | Sell | −20,871 | −$87.24K |
| 2026-06-24 | Daniel Calkins | Chief Financial Officer | Sell | −4,089 | −$17.09K |
| 2026-05-27 | Michael P Bailey | Director | A | +108,000 | — |
| 2026-05-26 | Anil Kapur | Director | A | +36,000 | — |
| 2026-05-26 | Eric K Rowinsky | Director | A | +36,000 | — |
| 2026-05-26 | John Johnson | Director | A | +36,000 | — |
| 2026-05-26 | Paul A. Bunn | Director | A | +36,000 | — |
| 2026-05-26 | Brian M Stuglik | Director | A | +36,000 | — |
| 2026-05-26 | Karin Anna Tollefson | Director | A | +36,000 | — |
| 2026-05-26 | Michelle Robertson | Director | A | +36,000 | — |
| 2026-05-06 | Dan Paterson | President and CEO | Sell | −806 | −$4.69K |
| 2026-03-23 | Daniel Calkins | Chief Financial Officer | A | −57 | −$327 |
| 2026-02-05 | Dan Paterson | President and CEO | Sell | −970 | −$6.49K |
| 2026-01-23 | Daniel Calkins | Chief Financial Officer | A | +16,665 | — |
| 2026-01-23 | Dan Paterson | President and CEO | A | +213,785 | — |
| 2026-01-14 | Daniel Calkins | Chief Financial Officer | Sell | −5,039 | −$36.08K |
| 2026-01-14 | Dan Paterson | President and CEO | Sell | −10,321 | −$73.90K |
| 2026-01-08 | Michael Kauffman | President of Development | A | +200,000 deriv. | — |
| 2025-12-29 | Daniel Calkins | Chief Financial Officer | Sell | −80 | −$629 |
| 2025-12-18 | Brian M Stuglik | Director | Sell | −592 | −$5.41K |
| 2025-12-18 | Robert E. Gagnon | Director | Sell | −283 | −$2.59K |
| 2025-12-18 | Dan Paterson | President and CEO | Sell | −393 | −$3.59K |
| 2025-12-12 | Dan Paterson | President and CEO | Sell | −4,000 | −$40.14K |
| 2025-12-09 | Dan Paterson | President and CEO | Sell | −6,000 | −$62.72K |
| 2025-12-04 | Dan Paterson | President and CEO | Sell | −6,000 | −$60.64K |
| 2025-12-01 | Dan Paterson | President and CEO | Sell | −6,000 | −$63.00K |
| 2025-11-25 | Michael Kauffman | Director | Sell | −8,550 | −$85.50K |
| 2025-11-25 | Dan Paterson | President and CEO | Sell | −6,000 | −$60.00K |
| 2025-11-25 | Paul A. Bunn | Director | MIXED | — | −$42.06K |
| 2025-11-06 | Dan Paterson | President and CEO | Sell | −3,299 | −$32.15K |
| 2025-10-14 | Paul A. Bunn | Director | Sell | −8,333 | −$75.50K |
| 2025-09-24 | Daniel Calkins | Chief Financial Officer | Sell | −82 | −$748 |
| 2025-09-18 | Brian M Stuglik | Director | Sell | −587 | −$5.86K |
| 2025-09-18 | Dan Paterson | President and CEO | Sell | −390 | −$3.90K |
| 2025-09-18 | Robert E. Gagnon | Director | Sell | −281 | −$2.81K |
| 2025-08-06 | Dan Paterson | President and CEO | Sell | −1,332 | −$7.74K |
| 2025-06-24 | Dan Paterson | President and CEO | Sell | −17,808 | −$91.36K |
| 2025-06-24 | Daniel Calkins | Chief Financial Officer | Sell | −4,135 | −$21.20K |
| 2025-06-20 | Robert E. Gagnon | Director | Sell | −284 | −$1.60K |
| 2025-06-20 | Dan Paterson | President and CEO | Sell | −335 | −$1.89K |
| 2025-06-20 | Brian M Stuglik | Director | Sell | −594 | −$3.36K |
| 2025-05-27 | Michelle Robertson | Director | A | +8,333 | — |
| 2025-05-27 | Karin Anna Tollefson | Director | A | +8,333 | — |
| 2025-05-27 | Anil Kapur | Director | A | +8,333 | — |
| 2025-05-27 | Eric K Rowinsky | Director | A | +8,333 | — |
| 2025-05-27 | John Johnson | Director | A | +8,333 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Dan Paterson | President and CEO | 712,927 | $6.15M |
| Brian M Stuglik | Director | 137,147 | $1.18M |
| Daniel Calkins | Chief Financial Officer | 123,781 | $1.07M |
| Michael P Bailey | Director | 108,000 | $930.96K |
| Eric K Rowinsky | Director | 54,666 | $471.22K |
| John Johnson | Director | 52,666 | $453.98K |
| Anil Kapur | Director | 52,666 | $453.98K |
| Michelle Robertson | Director | 52,666 | $453.98K |
| Karin Anna Tollefson | Director | 52,666 | $453.98K |
| Matthew Ros | Chief Operating Officer | 50,000 | $431.00K |
| Paul A. Bunn | Director | 44,333 | $382.15K |
| Robert E. Gagnon | Director | 41,678 | $359.26K |
| Michael Kauffman | President of Development | 8,666 | $74.70K |
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.
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.