VSTM
Verastem Inc
NASDAQ: VSTM · HEALTHCARE · BIOTECHNOLOGY
$4.88
-3.89% today
Updated 2026-06-05
Market cap
$346.22M
P/E ratio
—
P/S ratio
6.98x
EPS (TTM)
$-2.52
Dividend yield
—
52W range
$4 – $11
Volume
2.3M
Verastem Inc (VSTM) Insider transactions
Net insider activity
Net buying (801,287 shares)
Buy transactions
34
Sell transactions
66
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-21 | TOLLEFSON, KARIN ANNA | Director | Buy | 36,000 | — | — |
| 2026-05-21 | STUGLIK, BRIAN M | Director | Buy | 36,000 | — | — |
| 2026-05-21 | ROWINSKY, ERIC K | Director | Buy | 36,000 | — | — |
| 2026-05-21 | ROBERTSON, MICHELLE | Director | Buy | 36,000 | — | — |
| 2026-05-21 | KAPUR, ANIL | Director | Buy | 36,000 | — | — |
| 2026-05-21 | JOHNSON, JOHN | Director | Buy | 36,000 | — | — |
| 2026-05-21 | BUNN, PAUL A. | Director | Buy | 36,000 | — | — |
| 2026-05-21 | BAILEY, MICHAEL P | Director | Buy | 108,000 | — | — |
| 2026-05-04 | PATERSON, DAN | Director, President and CEO | Sale | 806 | $5.82 | $4690.92 |
| 2026-03-20 | CALKINS, DANIEL | Chief Financial Officer | Sale | 57 | $5.74 | $327.18 |
| 2026-02-04 | PATERSON, DAN | Director, President and CEO | Sale | 970 | $6.69 | $6489.30 |
| 2026-01-21 | PATERSON, DAN | Director, President and CEO | Buy | 213,785 | — | — |
| 2026-01-21 | CALKINS, DANIEL | Chief Financial Officer | Buy | 16,665 | — | — |
| 2026-01-12 | PATERSON, DAN | Director, President and CEO | Sale | 10,321 | $7.16 | $73898.36 |
| 2026-01-12 | CALKINS, DANIEL | Chief Financial Officer | Sale | 5,039 | $7.16 | $36079.24 |
| 2026-01-06 | KAUFFMAN, MICHAEL | Director, President of Development | Buy | 200,000 | — | — |
| 2025-12-24 | CALKINS, DANIEL | Chief Financial Officer | Sale | 80 | $7.86 | $628.80 |
| 2025-12-16 | STUGLIK, BRIAN M | Director | Sale | 592 | $9.14 | $5410.88 |
| 2025-12-16 | PATERSON, DAN | Director, President and CEO | Sale | 393 | $9.14 | $3592.02 |
| 2025-12-16 | GAGNON, ROBERT E. | Director | Sale | 283 | $9.14 | $2586.62 |
| 2025-12-11 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.00 | $20000.00 |
| 2025-12-10 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.07 | $20140.00 |
| 2025-12-09 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.25 | $20500.00 |
| 2025-12-08 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.50 | $21000.00 |
| 2025-12-05 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.61 | $21220.00 |
| 2025-12-04 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.00 | $20000.00 |
| 2025-12-03 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.00 | $20000.00 |
| 2025-12-02 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.32 | $20640.00 |
| 2025-12-01 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.39 | $20780.00 |
| 2025-11-28 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.79 | $21580.00 |
| 2025-11-26 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.32 | $20640.00 |
| 2025-11-25 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.00 | $20000.00 |
| 2025-11-24 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.00 | $20000.00 |
| 2025-11-21 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.00 | $20000.00 |
| 2025-11-21 | KAUFFMAN, MICHAEL | Director | Sale | 8,550 | $10.00 | $85500.00 |
| 2025-11-21 | BUNN, PAUL A. | Director | Sale | 6,250 | — | — |
| 2025-11-21 | BUNN, PAUL A. | Director | Buy | 6,250 | $3.27 | $20437.50 |
| 2025-11-03 | PATERSON, DAN | Director, President and CEO | Sale | 2,000 | $10.00 | $20000.00 |
| 2025-11-03 | PATERSON, DAN | Director, President and CEO | Sale | 1,299 | $9.35 | $12145.65 |
| 2025-10-09 | BUNN, PAUL A. | Director | Sale | 8,333 | $9.06 | $75496.98 |
| 2025-09-24 | CALKINS, DANIEL | Chief Financial Officer | Sale | 25 | $9.23 | $230.75 |
| 2025-09-22 | CALKINS, DANIEL | Chief Financial Officer | Sale | 57 | $9.08 | $517.56 |
| 2025-09-16 | STUGLIK, BRIAN M | Director | Sale | 587 | $9.99 | $5864.13 |
| 2025-09-16 | PATERSON, DAN | Director, President and CEO | Sale | 390 | $9.99 | $3896.10 |
| 2025-09-16 | GAGNON, ROBERT E. | Director | Sale | 281 | $9.99 | $2807.19 |
| 2025-08-06 | PATERSON, DAN | Director, President and CEO | Sale | 1,332 | $5.81 | $7738.92 |
| 2025-06-23 | CALKINS, DANIEL | Chief Financial Officer | Sale | 25 | $4.71 | $117.75 |
| 2025-06-20 | PATERSON, DAN | Director, President and CEO | Sale | 17,808 | $5.13 | $91355.04 |
| 2025-06-20 | CALKINS, DANIEL | Chief Financial Officer | Sale | 4,110 | $5.13 | $21084.30 |
| 2025-06-16 | STUGLIK, BRIAN M | Director | Sale | 594 | $5.65 | $3356.10 |
| 2025-06-16 | PATERSON, DAN | Director, President and CEO | Sale | 335 | $5.65 | $1892.75 |
| 2025-06-16 | GAGNON, ROBERT E. | Director | Sale | 284 | $5.65 | $1604.60 |
| 2025-05-22 | TOLLEFSON, KARIN ANNA | Director | Buy | 12,500 | — | — |
| 2025-05-22 | TOLLEFSON, KARIN ANNA | Director | Buy | 8,333 | — | — |
| 2025-05-22 | STUGLIK, BRIAN M | Director | Buy | 12,500 | — | — |
| 2025-05-22 | STUGLIK, BRIAN M | Director | Buy | 8,333 | — | — |
| 2025-05-22 | ROWINSKY, ERIC K | Director | Buy | 12,500 | — | — |
| 2025-05-22 | ROWINSKY, ERIC K | Director | Buy | 8,333 | — | — |
| 2025-05-22 | ROBERTSON, MICHELLE | Director | Buy | 12,500 | — | — |
| 2025-05-22 | ROBERTSON, MICHELLE | Director | Buy | 8,333 | — | — |
| 2025-05-22 | KAUFFMAN, MICHAEL | Director | Buy | 12,500 | — | — |
| 2025-05-22 | KAUFFMAN, MICHAEL | Director | Buy | 8,333 | — | — |
| 2025-05-22 | KAPUR, ANIL | Director | Buy | 12,500 | — | — |
| 2025-05-22 | KAPUR, ANIL | Director | Buy | 8,333 | — | — |
| 2025-05-22 | JOHNSON, JOHN | Director | Buy | 12,500 | — | — |
| 2025-05-22 | JOHNSON, JOHN | Director | Buy | 8,333 | — | — |
| 2025-05-22 | GAGNON, ROBERT E. | Director | Buy | 12,500 | — | — |
| 2025-05-22 | GAGNON, ROBERT E. | Director | Buy | 8,333 | — | — |
| 2025-05-22 | BUNN, PAUL A. | Director | Buy | 12,500 | — | — |
| 2025-05-22 | BUNN, PAUL A. | Director | Buy | 8,333 | — | — |
| 2025-05-20 | PATERSON, DAN | Director, President and CEO | Sale | 58,677 | $8.13 | $477044.01 |
| 2025-05-20 | CALKINS, DANIEL | Chief Financial Officer | Sale | 11,143 | $8.13 | $90592.59 |
| 2025-05-16 | PATERSON, DAN | Director, President and CEO | Sale | 150,000 | — | — |
| 2025-05-16 | PATERSON, DAN | Director, President and CEO | Sale | 25,000 | — | — |
| 2025-05-16 | CALKINS, DANIEL | Chief Financial Officer | Sale | 38,850 | — | — |
| 2025-05-05 | PATERSON, DAN | Director, President and CEO | Sale | 820 | $7.30 | $5986.00 |
| 2025-04-01 | ROS, MATTHEW | Chief Operating Officer | Buy | 50,000 | — | — |
| 2025-03-24 | CALKINS, DANIEL | Chief Financial Officer | Sale | 26 | $7.04 | $183.04 |
| 2025-03-20 | CALKINS, DANIEL | Chief Financial Officer | Sale | 65 | $6.89 | $447.85 |
| 2025-03-17 | STUGLIK, BRIAN M | Director | Sale | 593 | $6.95 | $4121.35 |
| 2025-03-17 | PATERSON, DAN | Director, President and CEO | Sale | 244 | $6.95 | $1695.80 |
| 2025-03-17 | GAGNON, ROBERT E. | Director | Sale | 284 | $6.95 | $1973.80 |
| 2025-02-04 | PATERSON, DAN | Director, President and CEO | Sale | 858 | $5.70 | $4890.60 |
| 2025-01-13 | PATERSON, DAN | Director, President and CEO | Sale | 8,568 | $5.24 | $44896.32 |
| 2025-01-10 | PATERSON, DAN | Director, President and CEO | Buy | 100,000 | — | — |
| 2025-01-10 | PATERSON, DAN | Director, President and CEO | Buy | 25,000 | — | — |
| 2025-01-10 | CALKINS, DANIEL | Chief Financial Officer | Buy | 38,800 | — | — |
| 2025-01-06 | CALKINS, DANIEL | Chief Financial Officer | Sale | 6 | $6.94 | $41.64 |
| 2024-12-24 | CALKINS, DANIEL | Chief Financial Officer | Sale | 28 | $3.91 | $109.48 |
| 2024-12-20 | CALKINS, DANIEL | Chief Financial Officer | Sale | 65 | $4.34 | $282.10 |
| 2024-12-19 | STUGLIK, BRIAN M | Director | Sale | 334 | $4.37 | $1459.58 |
| 2024-12-19 | PATERSON, DAN | Director, President and CEO | Sale | 183 | $4.37 | $799.71 |
| 2024-12-19 | GAGNON, ROBERT E. | Director | Sale | 130 | $4.37 | $568.10 |
| 2024-12-16 | STUGLIK, BRIAN M | Director | Sale | 595 | $4.54 | $2701.30 |
| 2024-12-16 | PATERSON, DAN | Director, President and CEO | Sale | 244 | $4.54 | $1107.76 |
| 2024-12-16 | GAGNON, ROBERT E. | Director | Sale | 285 | $4.54 | $1293.90 |
| 2024-11-05 | PATERSON, DAN | Director, President and CEO | Sale | 812 | $3.84 | $3118.08 |
| 2024-10-07 | CALKINS, DANIEL | Chief Financial Officer | Sale | 6 | $2.86 | $17.16 |
| 2024-09-24 | CALKINS, DANIEL | Chief Financial Officer | Sale | 28 | $2.68 | $75.04 |
| 2024-09-20 | CALKINS, DANIEL | Chief Financial Officer | Sale | 65 | $2.80 | $182.00 |
Frequently asked questions
Are VSTM insiders buying or selling?
Over the transactions on record, VSTM insiders have been net sellers, with about $1.40M in stock sold across 66 sales, against 1 open-market purchase.
Does insider selling at VSTM mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which VSTM insiders are selling the most?
Recent selling is concentrated in a few names. PATERSON, DAN accounts for the largest share on record, with about $1.05M sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.