There have been 50 recent insider transactions recorded for Verastem, Inc. (VSTM), including 12 buys and 38 sells. Total insider buying was valued at $2.22M and total insider selling at $799.47K.
Notable insiders with recent activity include Calkins Daniel, Paterson Dan, Kauffman Michael. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.
Insider Transactions — VSTM
| Date |
Name |
Role |
Transaction |
Shares |
Avg. Price |
Value |
Shares Owned |
| 2026-03-20 |
Calkins Daniel |
Chief Financial Officer |
RSU Award (Return) |
57 |
$5.74 |
$327.18 |
121,327 |
| 2026-02-04 |
Paterson Dan |
President and CEO |
Informative Sell |
970 |
$6.69 |
$6.49K |
612,919 |
| 2026-01-21 |
Paterson Dan |
President and CEO |
RSU Award |
213,785 |
- |
- |
613,889 |
| 2026-01-21 |
Calkins Daniel |
Chief Financial Officer |
RSU Award |
16,665 |
- |
- |
121,384 |
| 2026-01-12 |
Paterson Dan |
President and CEO |
Informative Sell |
10,321 |
$7.16 |
$73.9K |
400,104 |
| 2026-01-12 |
Calkins Daniel |
Chief Financial Officer |
Informative Sell |
5,039 |
$7.16 |
$36.08K |
104,719 |
| 2026-01-06 |
Kauffman Michael |
President of Development |
RSU Award |
200,000 |
$6.88 |
$1.38M |
200,000 |
| 2025-12-24 |
Calkins Daniel |
Chief Financial Officer |
Informative Sell |
80 |
$7.86 |
$628.80 |
109,758 |
| 2025-12-16 |
Gagnon Robert E. |
Director |
Informative Sell |
283 |
$9.14 |
$2.59K |
41,678 |
| 2025-12-16 |
Paterson Dan |
President and CEO |
Informative Sell |
393 |
$9.14 |
$3.59K |
410,425 |
| 2025-12-16 |
Stuglik Brian M |
Director |
Informative Sell |
592 |
$9.14 |
$5.41K |
101,147 |
| 2025-12-11 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.00 |
$20K |
410,818 |
| 2025-12-10 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.07 |
$20.14K |
412,818 |
| 2025-12-09 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.25 |
$20.5K |
414,818 |
| 2025-12-08 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.50 |
$21K |
416,818 |
| 2025-12-05 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.61 |
$21.22K |
418,818 |
| 2025-12-04 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.00 |
$20K |
420,818 |
| 2025-12-03 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.00 |
$20K |
422,818 |
| 2025-12-02 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.32 |
$20.64K |
424,818 |
| 2025-12-01 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.39 |
$20.78K |
426,818 |
| 2025-11-28 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.79 |
$21.58K |
428,818 |
| 2025-11-26 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.32 |
$20.64K |
430,818 |
| 2025-11-25 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.00 |
$20K |
432,818 |
| 2025-11-24 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.00 |
$20K |
434,818 |
| 2025-11-21 |
Kauffman Michael |
Director |
Informative Sell |
8,550 |
$10.00 |
$85.5K |
8,666 |
| 2025-11-21 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.00 |
$20K |
436,818 |
| 2025-11-21 |
Bunn Paul A. |
Director |
Informative Sell |
6,250 |
$10.00 |
$62.5K |
2,083 |
| 2025-11-03 |
Paterson Dan |
President and CEO |
Informative Sell |
2,000 |
$10.00 |
$20K |
438,818 |
| 2025-10-09 |
Bunn Paul A. |
Director |
Informative Sell |
8,333 |
$9.06 |
$75.5K |
8,333 |
| 2025-09-24 |
Calkins Daniel |
Chief Financial Officer |
Informative Sell |
25 |
$9.23 |
$230.75 |
109,838 |
| 2025-09-22 |
Calkins Daniel |
Chief Financial Officer |
Informative Sell |
57 |
$9.08 |
$517.56 |
109,863 |
| 2025-09-16 |
Gagnon Robert E. |
Director |
Informative Sell |
281 |
$9.99 |
$2.81K |
41,961 |
| 2025-09-16 |
Paterson Dan |
President and CEO |
Informative Sell |
390 |
$9.99 |
$3.9K |
442,117 |
| 2025-09-16 |
Stuglik Brian M |
Director |
Informative Sell |
587 |
$9.99 |
$5.86K |
101,739 |
| 2025-08-06 |
Paterson Dan |
President and CEO |
Informative Sell |
1,332 |
$5.81 |
$7.74K |
442,507 |
| 2025-06-23 |
Calkins Daniel |
Chief Financial Officer |
Informative Sell |
25 |
$4.71 |
$117.75 |
109,920 |
| 2025-06-20 |
Paterson Dan |
President and CEO |
Informative Sell |
17,808 |
$5.13 |
$91.36K |
443,839 |
| 2025-06-20 |
Calkins Daniel |
Chief Financial Officer |
Informative Sell |
4,110 |
$5.13 |
$21.08K |
109,945 |
| 2025-06-16 |
Gagnon Robert E. |
Director |
Informative Sell |
284 |
$5.65 |
$1.6K |
42,242 |
| 2025-06-16 |
Paterson Dan |
President and CEO |
Informative Sell |
335 |
$5.65 |
$1.89K |
461,647 |
| 2025-06-16 |
Stuglik Brian M |
Director |
Informative Sell |
594 |
$5.65 |
$3.36K |
102,326 |
| 2025-05-22 |
Rowinsky Eric K |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
| 2025-05-22 |
Kauffman Michael |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
| 2025-05-22 |
Johnson John |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
| 2025-05-22 |
Gagnon Robert E. |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
| 2025-05-22 |
Stuglik Brian M |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
| 2025-05-22 |
Kapur Anil |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
| 2025-05-22 |
Robertson Michelle |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
| 2025-05-22 |
Bunn Paul A. |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
| 2025-05-22 |
Tollefson Karin Anna |
Director |
RSU Award |
12,500 |
$7.48 |
$93.5K |
12,500 |
■ Informative Buy/Sell — open market transaction (most significant)
■ Uninformative Buy — award, option exercise, conversion
■ Uninformative Sell — tax withholding, award vest sale
■ Neutral — gift, trust, expiry
