Verastem's three largest insider shareholders as of June 18, 2026 are Dan Paterson (President And Ceo, 612.92K shares), Daniel Calkins (Chief Financial Officer, 121.33K shares), Brian M Stuglik (Chief Executive Officer, 101.15K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Eric K Rowinsky | - | 16,666 | 0 | 27 May, 2025 |
| Michael Kauffman | - | 8,666 | 0 | 25 Nov, 2025 |
| John Johnson | - | 16,666 | 0 | 27 May, 2025 |
| Robert E. Gagnon | Chief Financial Officer | 41,678 | 0 | 18 Dec, 2025 |
| Dan Paterson | President And Ceo | 612,919 | 0 | 05 Feb, 2026 |
| Matthew Ros | Chief Operating Officer | 50,000 | 0 | 03 Apr, 2025 |
| Brian M Stuglik | Chief Executive Officer | 101,147 | 0 | 18 Dec, 2025 |
| Anil Kapur | - | 16,666 | 0 | 27 May, 2025 |
| Michelle Robertson | - | 16,666 | 0 | 27 May, 2025 |
| Paul A. Bunn | - | 8,333 | 0 | 25 Nov, 2025 |
| Daniel Calkins | Chief Financial Officer | 121,327 | 0 | 23 Mar, 2026 |
| Karin Anna Tollefson | - | 16,666 | 0 | 27 May, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 20 Mar, 2026 | Daniel Calkins | Common Stock | D | 57 | $5.74 | 121,327 | D | A |
| 04 Feb, 2026 | Dan Paterson | Common Stock | D | 970 | $6.69 | 612,919 | D | S |
| 21 Jan, 2026 | Daniel Calkins | Common Stock | A | 16,665 | $0.00 | 121,384 | D | A |
| 21 Jan, 2026 | Dan Paterson | Common Stock | A | 213,785 | $0.00 | 613,889 | D | A |
| 12 Jan, 2026 | Dan Paterson | Common Stock | D | 10,321 | $7.16 | 400,104 | D | S |
| 12 Jan, 2026 | Daniel Calkins | Common Stock | D | 5,039 | $7.16 | 104,719 | D | S |
| 06 Jan, 2026 | Michael Kauffman | Stock Option (right to buy) | A | 200,000 | $0.00 | 200,000 | D | A |
| 24 Dec, 2025 | Daniel Calkins | Common Stock | D | 80 | $7.86 | 109,758 | D | S |
| 16 Dec, 2025 | Dan Paterson | Common Stock | D | 393 | $9.14 | 410,425 | D | S |
| 16 Dec, 2025 | Robert E. Gagnon | Common Stock | D | 283 | $9.14 | 41,678 | D | S |
| 16 Dec, 2025 | Brian M Stuglik | Common Stock | D | 592 | $9.14 | 101,147 | D | S |
| 10 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.07 | 412,818 | D | S |
| 11 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.00 | 410,818 | D | S |
| 05 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.61 | 418,818 | D | S |
| 08 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.50 | 416,818 | D | S |
| 09 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.25 | 414,818 | D | S |
| 02 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.32 | 424,818 | D | S |
| 03 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.00 | 422,818 | D | S |
| 04 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.00 | 420,818 | D | S |
| 26 Nov, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.32 | 430,818 | D | S |