Data spanning the past 90 days through December 12, 2025 reveals that Verastem's three principal insider shareholders consist of President And CEO Dan Paterson (414.82K shares), Chief Financial Officer Daniel Calkins (109.84K shares), Director Michael Kauffman (8.67K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Dan Paterson | President And CEO | 410,818 | 12 Dec, 2025 |
| Frank Neumann | Chief Medical Officer | 12,500 | 08 Jan, 2021 |
| Daniel Calkins | Chief Financial Officer | 109,838 | 24 Sep, 2025 |
| Brian M Stuglik | 101,739 | 18 Sep, 2025 | |
| Matthew Ros | Chief Operating Officer | 50,000 | 03 Apr, 2025 |
| Robert E. Gagnon | 41,961 | 18 Sep, 2025 | |
| John Johnson | 16,666 | 27 May, 2025 | |
| Anil Kapur | 16,666 | 27 May, 2025 | |
| Eric K Rowinsky | 16,666 | 27 May, 2025 | |
| Karin Anna Tollefson | 16,666 | 27 May, 2025 | |
| Michelle Robertson | 16,666 | 27 May, 2025 | |
| Michael Kauffman | 8,666 | 25 Nov, 2025 | |
| Paul A. Bunn | 8,333 | 25 Nov, 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 |
|---|---|---|---|---|---|---|---|---|
| 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 |
| 28 Nov, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.79 | 428,818 | D | S |
| 01 Dec, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.39 | 426,818 | D | S |
| 21 Nov, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.00 | 436,818 | D | S |
| 21 Nov, 2025 | Michael Kauffman | Common Stock | D | 8,550 | $10.00 | 8,666 | D | S |
| 21 Nov, 2025 | Paul A. Bunn | Common Stock | D | 6,250 | $10.00 | 2,083 | D | S |
| 21 Nov, 2025 | Paul A. Bunn | Common Stock | A | 6,250 | $3.27 | 8,333 | D | M |
| 24 Nov, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.00 | 434,818 | D | S |
| 25 Nov, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.00 | 432,818 | D | S |
| 03 Nov, 2025 | Dan Paterson | Common Stock | D | 1,299 | $9.35 | 440,818 | D | S |
| 03 Nov, 2025 | Dan Paterson | Common Stock | D | 2,000 | $10.00 | 438,818 | D | S |
| 09 Oct, 2025 | Paul A. Bunn | Common Stock | D | 8,333 | $9.06 | 8,333 | D | S |