Verastem (VSTM)
Verastem on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as pharmaceutical preparations.
15.0M
Short interest
settlement 2026-09-30
7.0
Days to cover
+0.5 days vs prior
64.8%
Short share of volume
2026-10-23
5,469
Fails to deliver
settlement 2026-09-08
Wed 3 Feb
Next earnings
estimated date
-$381K
Insider flow, 90 days
0 buys, 4 sells
As of 2026-10-23.
Short interest
FINRA, twice a month. The newest 48 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in VSTM is 14,964,825 shares, down 3,333,490 shares over the last month. Over the last 48 readings it ranged from 2,004,022 shares (29 November 2024) to 24,142,937 shares (30 June 2026). At the reported average volume of 2.1M shares a day that is 7.0 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 14,964,825 | -17.0% | 2,145,520 | 6.97 |
| 2026-09-15 | 18,028,616 | -1.5% | 2,766,524 | 6.52 |
| 2026-08-31 | 18,298,315 | -3.2% | 1,668,342 | 10.97 |
| 2026-08-14 | 18,909,052 | -4.6% | 1,963,144 | 9.63 |
| 2026-07-31 | 19,825,791 | -1.4% | 2,120,165 | 9.35 |
| 2026-07-15 | 20,103,345 | -16.7% | 2,941,341 | 6.83 |
| 2026-06-30 | 24,142,937 | +10.9% | 3,471,505 | 6.95 |
| 2026-06-15 | 21,774,894 | +2.6% | 2,449,781 | 8.89 |
| 2026-05-29 | 21,213,623 | +18.7% | 2,094,874 | 10.13 |
| 2026-05-15 | 17,870,249 | +2.0% | 2,555,439 | 6.99 |
| 2026-04-30 | 17,523,588 | +0.6% | 1,996,507 | 8.78 |
| 2026-04-15 | 17,417,758 | +6.4% | 1,934,943 | 9.00 |
| 2026-03-31 | 16,365,830 | -8.3% | 2,695,987 | 6.07 |
| 2026-03-13 | 17,851,179 | +4.4% | 1,696,365 | 10.52 |
| 2026-02-27 | 17,095,624 | -5.3% | 1,263,042 | 13.54 |
| 2026-02-13 | 18,052,448 | +9.7% | 1,708,619 | 10.57 |
| 2026-01-30 | 16,459,027 | -3.8% | 1,639,313 | 10.04 |
| 2026-01-15 | 17,115,556 | +0.6% | 2,383,161 | 7.18 |
| 2025-12-31 | 17,017,419 | +1.8% | 1,829,230 | 9.30 |
| 2025-12-15 | 16,721,345 | -9.1% | 1,556,501 | 10.74 |
| 2025-11-28 | 18,393,487 | -3.9% | 2,851,226 | 6.45 |
| 2025-11-14 | 19,141,071 | +8.6% | 2,664,653 | 7.18 |
| 2025-10-31 | 17,632,734 | -2.5% | 2,640,714 | 6.68 |
| 2025-10-15 | 18,094,970 | +3.6% | 1,737,883 | 10.41 |
| 2025-09-30 | 17,472,645 | +3.9% | 1,807,236 | 9.67 |
| 2025-09-15 | 16,820,046 | +5.4% | 2,500,859 | 6.73 |
| 2025-08-29 | 15,964,999 | +0.0% | 2,634,522 | 6.06 |
| 2025-08-15 | 15,961,742 | -6.4% | 3,070,122 | 5.20 |
| 2025-07-31 | 17,053,705 | -5.8% | 2,709,984 | 6.29 |
| 2025-07-15 | 18,107,601 | +15.0% | 2,127,922 | 8.51 |
| 2025-06-30 | 15,748,949 | +29.3% | 3,013,038 | 5.23 |
| 2025-06-13 | 12,182,979 | -7.5% | 2,401,234 | 5.07 |
| 2025-05-30 | 13,178,438 | -0.8% | 2,289,535 | 5.76 |
| 2025-05-15 | 13,280,930 | +42.5% | 1,766,564 | 7.52 |
| 2025-04-30 | 9,322,943 | +5.8% | 1,508,662 | 6.18 |
| 2025-04-15 | 8,816,146 | +11.9% | 968,731 | 9.10 |
| 2025-03-31 | 7,881,216 | +7.7% | 682,832 | 11.54 |
| 2025-03-14 | 7,321,486 | +22.8% | 1,267,690 | 5.78 |
| 2025-02-28 | 5,964,402 | +6.8% | 406,669 | 14.67 |
| 2025-02-14 | 5,582,900 | +6.5% | 515,486 | 10.83 |
| 2025-01-31 | 5,240,330 | +6.3% | 1,226,104 | 4.27 |
| 2025-01-15 | 4,927,281 | +59.4% | 2,293,040 | 2.15 |
| 2024-12-31 | 3,090,756 | +18.0% | 2,400,243 | 1.29 |
| 2024-12-13 | 2,619,242 | +30.7% | 1,062,222 | 2.47 |
| 2024-11-29 | 2,004,022 | -15.0% | 1,004,579 | 1.99 |
| 2024-11-15 | 2,356,826 | -4.3% | 1,076,159 | 2.19 |
| 2024-10-31 | 2,462,203 | +0.9% | 1,470,856 | 1.67 |
| 2024-10-15 | 2,440,206 | +3.9% | 545,385 | 4.47 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 23 October 2026, the short share of VSTM volume is 64.8%, up 17.7 points over the last five sessions. Over the last 30 readings it ranged from 31.5% (22 October 2026) to 70.2% (8 October 2026). The latest reading is 15.5 points above the 30-session average of 49.3%, on 1.7M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-23 | 1.1M | 1.7M | 64.8% | 1,818 |
| 2026-10-22 | 980K | 3.1M | 31.5% | 132 |
| 2026-10-21 | 551K | 1.5M | 36.9% | 823 |
| 2026-10-20 | 637K | 1.7M | 37.3% | 1,264 |
| 2026-10-19 | 600K | 1.2M | 51.7% | 1,122 |
| 2026-10-16 | 1.1M | 2.4M | 47.1% | 7,372 |
| 2026-10-15 | 3.4M | 7.6M | 44.8% | 255,018 |
| 2026-10-14 | 7.7M | 14.1M | 54.2% | 381,838 |
| 2026-10-13 | 575K | 1.2M | 46.9% | 985 |
| 2026-10-12 | 884K | 1.4M | 62.6% | 4 |
| 2026-10-09 | 474K | 1.0M | 45.9% | 4,034 |
| 2026-10-08 | 568K | 809K | 70.2% | 28 |
| 2026-10-07 | 397K | 1.3M | 31.6% | 3,641 |
| 2026-10-06 | 428K | 832K | 51.5% | 0 |
| 2026-10-05 | 322K | 629K | 51.2% | 0 |
| 2026-10-02 | 729K | 1.8M | 40.1% | 11 |
| 2026-10-01 | 281K | 477K | 58.9% | 200 |
| 2026-09-30 | 159K | 404K | 39.3% | 326 |
| 2026-09-29 | 292K | 843K | 34.6% | 279 |
| 2026-09-28 | 200K | 478K | 41.8% | 1,900 |
| 2026-09-25 | 196K | 308K | 63.6% | 4 |
| 2026-09-24 | 303K | 474K | 63.9% | 590 |
| 2026-09-23 | 445K | 770K | 57.8% | 5,509 |
| 2026-09-22 | 567K | 1.5M | 38.2% | 0 |
| 2026-09-21 | 459K | 928K | 49.5% | 2,400 |
| 2026-09-18 | 296K | 620K | 47.8% | 14 |
| 2026-09-17 | 234K | 517K | 45.3% | 211 |
| 2026-09-16 | 257K | 482K | 53.3% | 3,776 |
| 2026-09-15 | 360K | 750K | 48.0% | 4,000 |
| 2026-09-14 | 374K | 551K | 67.9% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 8 September 2026, the fails-to-deliver balance in VSTM is 5,469 shares, up 5,410 shares over the last settlement date. Over the last 30 readings it ranged from 2 shares (30 July 2026) to 183,141 shares (9 July 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-09-08 | 5,469 | $8.20 | $45K |
| 2026-08-31 | 59 | $7.22 | $426 |
| 2026-08-25 | 4,337 | $6.86 | $30K |
| 2026-08-24 | 45,282 | $6.89 | $312K |
| 2026-08-21 | 12,477 | $6.82 | $85K |
| 2026-08-20 | 44,300 | $7.30 | $323K |
| 2026-08-19 | 18,363 | $7.43 | $136K |
| 2026-08-18 | 4,064 | $7.18 | $29K |
| 2026-08-17 | 7,277 | $6.58 | $48K |
| 2026-08-14 | 2,641 | $6.67 | $18K |
| 2026-08-06 | 41,075 | $5.87 | $241K |
| 2026-07-30 | 2 | $6.01 | $12 |
| 2026-07-29 | 110 | $6.23 | $685 |
| 2026-07-20 | 148 | $6.03 | $892 |
| 2026-07-17 | 2,603 | $5.77 | $15K |
| 2026-07-15 | 256 | $5.57 | $1K |
| 2026-07-09 | 183,141 | $5.08 | $930K |
| 2026-07-08 | 4 | $4.85 | $19 |
| 2026-06-30 | 81,336 | $3.82 | $311K |
| 2026-06-29 | 123,907 | $3.78 | $468K |
| 2026-06-26 | 29,798 | $3.45 | $103K |
| 2026-06-17 | 52 | $4.01 | $209 |
| 2026-06-15 | 1,303 | $4.10 | $5K |
| 2026-06-12 | 7,615 | $3.94 | $30K |
| 2026-05-21 | 13,000 | $4.13 | $54K |
| 2026-05-19 | 106 | $4.26 | $452 |
| 2026-04-20 | 13,438 | $6.58 | $88K |
| 2026-04-08 | 951 | $5.45 | $5K |
| 2026-04-01 | 2,032 | $5.30 | $11K |
| 2026-03-16 | 140,475 | $5.60 | $787K |
Insider trades
SEC Form 4, newest first. JSONInsiders at VSTM reported 4 open-market sells worth $381K in the last 90 days and no open-market buys. Latest filing: Paterson Dan (President and CEO) on 2026-10-01.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-10-01 | Paterson Dan | President and CEO | Sell | 44K | $8.00 | $353K | 653K |
| 2026-10-01 | Calkins Daniel | Chief Financial Officer | Sell | 3K | $8.00 | $21K | 124K |
| 2026-09-30 | Paterson Dan | President and CEO | Grant | 107K | $0.00 | $0 | 697K |
| 2026-09-30 | Calkins Daniel | Chief Financial Officer | Grant | 8K | $0.00 | $0 | 126K |
| 2026-09-21 | Calkins Daniel | Chief Financial Officer | Sell | 55 | $7.70 | $424 | 118K |
| 2026-08-03 | Paterson Dan | President and CEO | Sell | 1K | $5.81 | $8K | 590K |
| 2026-06-22 | Calkins Daniel | Chief Financial Officer | Sell | 57 | $4.13 | $235 | 117K |
| 2026-06-22 | Calkins Daniel | Chief Financial Officer | Sell | 4K | $4.18 | $17K | 117K |
| 2026-06-22 | Paterson Dan | President and CEO | Sell | 21K | $4.18 | $87K | 591K |
| 2026-05-21 | Tollefson Karin Anna | Director | Grant | 36K | $0.00 | $0 | 53K |
| 2026-05-21 | Stuglik Brian M | Director | Grant | 36K | $0.00 | $0 | 137K |
| 2026-05-21 | Rowinsky Eric K | Director | Grant | 36K | $0.00 | $0 | 53K |
| 2026-05-21 | ROBERTSON MICHELLE | Director | Grant | 36K | $0.00 | $0 | 53K |
| 2026-05-21 | Kapur Anil | Director | Grant | 36K | $0.00 | $0 | 53K |
| 2026-05-21 | JOHNSON JOHN | Director | Grant | 36K | $0.00 | $0 | 53K |
| 2026-05-21 | Bunn Paul A. | Director | Grant | 36K | $0.00 | $0 | 44K |
| 2026-05-21 | BAILEY MICHAEL P | Director | Grant | 108K | $0.00 | $0 | 108K |
| 2026-05-04 | Paterson Dan | President and CEO | Sell | 806 | $5.82 | $5K | 612K |
| 2026-03-20 | Calkins Daniel | Chief Financial Officer | Grant | 57 | $5.74 | $327 | 121K |
| 2026-02-04 | Paterson Dan | President and CEO | Sell | 970 | $6.69 | $6K | 613K |
| 2026-01-21 | Paterson Dan | President and CEO | Grant | 214K | $0.00 | $0 | 614K |
| 2026-01-21 | Calkins Daniel | Chief Financial Officer | Grant | 17K | $0.00 | $0 | 121K |
| 2026-01-12 | Paterson Dan | President and CEO | Sell | 10K | $7.16 | $74K | 400K |
| 2026-01-12 | Calkins Daniel | Chief Financial Officer | Sell | 5K | $7.16 | $36K | 105K |
| 2025-12-24 | Calkins Daniel | Chief Financial Officer | Sell | 80 | $7.86 | $629 | 110K |
| 2025-12-16 | Stuglik Brian M | Director | Sell | 592 | $9.14 | $5K | 101K |
| 2025-12-16 | Paterson Dan | President and CEO | Sell | 393 | $9.14 | $4K | 410K |
| 2025-12-16 | Gagnon Robert E. | Director | Sell | 283 | $9.14 | $3K | 42K |
| 2025-12-11 | Paterson Dan | President and CEO | Sell | 2K | $10.00 | $20K | 411K |
| 2025-12-10 | Paterson Dan | President and CEO | Sell | 2K | $10.07 | $20K | 413K |
| 2025-12-09 | Paterson Dan | President and CEO | Sell | 2K | $10.25 | $21K | 415K |
| 2025-12-08 | Paterson Dan | President and CEO | Sell | 2K | $10.50 | $21K | 417K |
| 2025-12-05 | Paterson Dan | President and CEO | Sell | 2K | $10.61 | $21K | 419K |
| 2025-12-04 | Paterson Dan | President and CEO | Sell | 2K | $10.00 | $20K | 421K |
| 2025-12-03 | Paterson Dan | President and CEO | Sell | 2K | $10.00 | $20K | 423K |
| 2025-12-02 | Paterson Dan | President and CEO | Sell | 2K | $10.32 | $21K | 425K |
| 2025-12-01 | Paterson Dan | President and CEO | Sell | 2K | $10.39 | $21K | 427K |
| 2025-11-28 | Paterson Dan | President and CEO | Sell | 2K | $10.79 | $22K | 429K |
| 2025-11-26 | Paterson Dan | President and CEO | Sell | 2K | $10.32 | $21K | 431K |
| 2025-11-25 | Paterson Dan | President and CEO | Sell | 2K | $10.00 | $20K | 433K |
| 2025-11-24 | Paterson Dan | President and CEO | Sell | 2K | $10.00 | $20K | 435K |
| 2025-11-21 | Paterson Dan | President and CEO | Sell | 2K | $10.00 | $20K | 437K |
| 2025-11-21 | Kauffman Michael | Director | Sell | 9K | $10.00 | $86K | 9K |
| 2025-11-21 | Bunn Paul A. | Director | Exercise or conversion | 6K | $3.27 | $20K | 8K |
| 2025-11-21 | Bunn Paul A. | Director | Sell | 6K | $10.00 | $63K | 2K |
| 2025-11-03 | Paterson Dan | President and CEO | Sell | 2K | $10.00 | $20K | 439K |
| 2025-11-03 | Paterson Dan | President and CEO | Sell | 1K | $9.35 | $12K | 441K |
| 2025-10-09 | Bunn Paul A. | Director | Sell | 8K | $9.06 | $75K | 8K |
| 2025-09-24 | Calkins Daniel | Chief Financial Officer | Sell | 25 | $9.23 | $231 | 110K |
| 2025-09-22 | Calkins Daniel | Chief Financial Officer | Sell | 57 | $9.08 | $518 | 110K |
| 2025-09-16 | Stuglik Brian M | Director | Sell | 587 | $9.99 | $6K | 102K |
| 2025-09-16 | Paterson Dan | President and CEO | Sell | 390 | $9.99 | $4K | 442K |
| 2025-09-16 | Gagnon Robert E. | Director | Sell | 281 | $9.99 | $3K | 42K |
| 2025-08-06 | Paterson Dan | President and CEO | Sell | 1K | $5.81 | $8K | 443K |
| 2025-06-23 | Calkins Daniel | Chief Financial Officer | Sell | 25 | $4.71 | $118 | 110K |
| 2025-06-20 | Paterson Dan | President and CEO | Sell | 18K | $5.13 | $91K | 444K |
| 2025-06-20 | Calkins Daniel | Chief Financial Officer | Sell | 4K | $5.13 | $21K | 110K |
| 2025-06-16 | Stuglik Brian M | Director | Sell | 594 | $5.65 | $3K | 102K |
| 2025-06-16 | Paterson Dan | President and CEO | Sell | 335 | $5.65 | $2K | 462K |
| 2025-06-16 | Gagnon Robert E. | Director | Sell | 284 | $5.65 | $2K | 42K |
| 2025-05-22 | Rowinsky Eric K | Director | Grant | 8K | $0.00 | $0 | 17K |
| 2025-05-22 | JOHNSON JOHN | Director | Grant | 8K | $0.00 | $0 | 17K |
| 2025-05-22 | Tollefson Karin Anna | Director | Grant | 8K | $0.00 | $0 | 17K |
| 2025-05-22 | Kauffman Michael | Director | Grant | 8K | $0.00 | $0 | 17K |
| 2025-05-22 | Gagnon Robert E. | Director | Grant | 8K | $0.00 | $0 | 43K |
| 2025-05-22 | Stuglik Brian M | Director | Grant | 8K | $0.00 | $0 | 103K |
| 2025-05-22 | Kapur Anil | Director | Grant | 8K | $0.00 | $0 | 17K |
| 2025-05-22 | Bunn Paul A. | Director | Grant | 8K | $0.00 | $0 | 17K |
| 2025-05-22 | ROBERTSON MICHELLE | Director | Grant | 8K | $0.00 | $0 | 17K |
| 2025-05-20 | Paterson Dan | President and CEO | Sell | 59K | $8.13 | $477K | 462K |
| 2025-05-20 | Calkins Daniel | Chief Financial Officer | Sell | 11K | $8.13 | $91K | 114K |
| 2025-05-16 | Paterson Dan | President and CEO | Grant | 25K | $0.00 | $0 | 371K |
| 2025-05-16 | Paterson Dan | President and CEO | Grant | 150K | $0.00 | $0 | 521K |
| 2025-05-16 | Calkins Daniel | Chief Financial Officer | Grant | 39K | $0.00 | $0 | 125K |
| 2025-05-05 | Paterson Dan | President and CEO | Sell | 820 | $7.30 | $6K | 346K |
| 2025-04-01 | Ros Matthew | Chief Operating Officer | Grant | 50K | $0.00 | $0 | 50K |
| 2025-03-24 | Calkins Daniel | Chief Financial Officer | Sell | 26 | $7.04 | $183 | 86K |
| 2025-03-20 | Calkins Daniel | Chief Financial Officer | Sell | 65 | $6.89 | $448 | 86K |
| 2025-03-17 | Stuglik Brian M | Director | Sell | 593 | $6.95 | $4K | 95K |
| 2025-03-17 | Gagnon Robert E. | Director | Sell | 284 | $6.95 | $2K | 34K |
| 2025-03-17 | Paterson Dan | President and CEO | Sell | 244 | $6.95 | $2K | 346K |
| 2025-02-04 | Paterson Dan | President and CEO | Sell | 858 | $5.70 | $5K | 347K |
| 2025-01-13 | Paterson Dan | President and CEO | Sell | 9K | $5.24 | $45K | 348K |
| 2025-01-10 | Calkins Daniel | Chief Financial Officer | Grant | 39K | $0.00 | $0 | 86K |
| 2025-01-10 | Paterson Dan | President and CEO | Grant | 25K | $0.00 | $0 | 356K |
| 2025-01-10 | Paterson Dan | President and CEO | Grant | 100K | $0.00 | $0 | 331K |
| 2025-01-06 | Calkins Daniel | Chief Financial Officer | Sell | 6 | $6.94 | $42 | 48K |
| 2024-12-24 | Calkins Daniel | Chief Financial Officer | Sell | 28 | $3.91 | $109 | 47K |
| 2024-12-20 | Calkins Daniel | Chief Financial Officer | Sell | 65 | $4.34 | $282 | 47K |
| 2024-12-19 | Paterson Dan | President and CEO | Sell | 183 | $4.37 | $800 | 231K |
| 2024-12-19 | Stuglik Brian M | Director | Sell | 334 | $4.37 | $1K | 95K |
| 2024-12-19 | Gagnon Robert E. | Director | Sell | 130 | $4.37 | $568 | 34K |
| 2024-12-16 | Paterson Dan | President and CEO | Sell | 244 | $4.54 | $1K | 231K |
| 2024-12-16 | Stuglik Brian M | Director | Sell | 595 | $4.54 | $3K | 96K |
| 2024-12-16 | Gagnon Robert E. | Director | Sell | 285 | $4.54 | $1K | 35K |
| 2024-11-05 | Paterson Dan | President and CEO | Sell | 812 | $3.84 | $3K | 232K |
| 2024-10-07 | Calkins Daniel | Chief Financial Officer | Sell | 6 | $2.86 | $17 | 47K |
| 2024-09-24 | Calkins Daniel | Chief Financial Officer | Sell | 28 | $2.68 | $75 | 47K |
| 2024-09-20 | Calkins Daniel | Chief Financial Officer | Sell | 65 | $2.80 | $182 | 47K |
| 2024-09-19 | Stuglik Brian M | Director | Sell | 336 | $2.79 | $937 | 96K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON12 Form 144 notices on file for VSTM worth $1.3M at the prices reported; 1 in the last 90 days worth $353K. Latest: Dan Paterson filed on 2026-10-01 to sell 44,121 shares ($353K) from 2026-10-01.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-10-01 | Dan PatersonOfficer, Director | 44K | $353K | 0.049% | 2026-10-01 | Shareworks by Morgan Stanley |
| 2026-07-23 | Gagnon Robert E.Director | 32K | $188K | 0.036% | 2026-07-23 | Jefferies LLC |
| 2026-06-25 | Gagnon Robert E.Director | 21K | $90K | 0.024% | 2026-06-25 | Jefferies LLC |
| 2026-06-22 | Dan PatersonOfficer, Director | 21K | $87K | 0.024% | 2026-06-22 | Shareworks by Morgan Stanley |
| 2026-05-27 | Gagnon Robert E.Director | 20K | $88K | 0.023% | 2026-05-27 | Jefferies LLC |
| 2026-01-14 | Dan PatersonOfficer, Director | 10K | $74K | 0.015% | 2026-01-12 | Shareworks by Morgan Stanley |
| 2026-01-14 | Dan PatersonOfficer | 5K | $36K | 0.008% | 2026-01-12 | Shareworks by Morgan Stanley |
| 2025-12-10 | Paterson DanOfficer | 12K | $118K | 0.016% | 2025-12-05 | Raymond James & Associates |
| 2025-12-09 | Paterson DanOfficer | 8K | $80K | 0.010% | 2025-12-09 | Raymond James & Associates |
| 2025-11-21 | Kauffman MichaelBoard Member | 9K | $84K | 0.013% | 2025-11-21 | Jefferies LLC |
| 2025-11-21 | Bunn Paul A.Board Member | 6K | $61K | 0.009% | 2025-11-21 | Jefferies LLC |
| 2025-10-09 | Bunn Paul A.Board Member | 8K | $74K | 0.013% | 2025-10-09 | Jefferies LLC |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON10 holders report 5% or more of VSTM in their latest filing, all on Schedule 13G (passive). The largest reported stake is Deep Track Capital, LP at 10.0% of the class (7,719,390 shares), filed 2025-11-21 for an event on 2025-11-14.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-08-14 | 13G/Ano. 2 | Steven Boydparent holding company, individual | 7.0M | 7.8% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 2 | Armistice Capital, LLCinvestment adviser, other entity | 7.0M | 7.8% | 2026-06-30 |
| 2026-08-07 | 13G | STATE STREET CORPORATIONparent holding company | 5.1M | 5.8% | 2026-06-30 |
| 2026-07-31 | 13G | Vanguard Capital Managementinvestment adviser | 4.4M | 5.0% | 2026-06-30 |
| 2026-07-30 | 13G/Ano. 1 | BlackRock, Inc.parent holding company | 6.2M | 7.0% | 2026-06-30 |
| 2026-07-08 | 13G/Ano. 1 | Polar Capital LLPinvestment adviser | 3.7M | 4.8% | 2026-03-31 |
| 2026-07-08 | 13G/Ano. 1 | Polar Capital Holdings Plcparent holding company | 3.7M | 4.8% | 2026-03-31 |
| 2026-07-08 | 13G/Ano. 1 | Polar Capital Funds PLC - Biotechnology Fundother entity | 3.7M | 4.8% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 3 | Roderick Wongparent holding company, individual | 9.0M | 9.9% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 3 | RTW Investments, LPinvestment adviser, partnership | 9.0M | 9.9% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 5 | Dmitry Balyasnyparent holding company, individual | 1.4M | 1.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 5 | Dames GP LLCparent holding company, other entity | 1.4M | 1.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 5 | Balyasny Asset Management Holdings LPparent holding company, partnership | 1.4M | 1.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 5 | BAM GP LLCparent holding company, other entity | 1.4M | 1.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 5 | Balyasny Asset Management L.P.investment adviser, partnership | 1.4M | 1.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Foresite Capital Management VI LLCother entity | 3.1M | 3.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Foresite Capital Fund VI LPpartnership | 3.1M | 3.6% | 2026-03-31 |
| 2026-05-15 | 13G/Ano. 1 | Tananbaum James B.individual | 3.1M | 3.6% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 2 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G/Ano. 1 | Steven A. Cohenindividual | 995K | 1.3% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Point72 Asset Management, L.P.partnership | 995K | 1.3% | 2025-12-31 |
| 2026-02-17 | 13G/Ano. 1 | Point72 Capital Advisors, Inc.corporation | 995K | 1.3% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 4 | Nantahala Capital Management, LLCinvestment adviser | 3.8M | 4.7% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 4 | Wilmot B. Harkeyparent holding company | 3.8M | 4.7% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 4 | Daniel Mackparent holding company | 3.8M | 4.7% | 2025-12-31 |
| 2025-11-21 | 13G | Deep Track Capital, LPinvestment adviser, other entity | 7.7M | 10.0% | 2025-11-14 |
| 2025-11-21 | 13G | Deep Track Biotechnology Master Fund, Ltd.corporation | 7.7M | 10.0% | 2025-11-14 |
| 2025-11-21 | 13G | David Kroinparent holding company, individual | 7.7M | 10.0% | 2025-11-14 |
| 2025-11-14 | 13G/Ano. 1 | Logos Global Management GP LLCparent holding company, other entity | 3.2M | 4.8% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 1 | Logos Global Management LPinvestment adviser, partnership | 3.2M | 4.8% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 1 | Logos Global Master Fund LPpartnership | 3.2M | 4.8% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 1 | Logos GP LLCparent holding company, other entity | 3.2M | 4.8% | 2025-09-30 |
| 2025-11-14 | 13G/Ano. 1 | Arsani Williamparent holding company, individual | 3.2M | 4.8% | 2025-09-30 |
| 2025-11-13 | 13G/Ano. 1 | Stonepine Capital Management, LLCinvestment adviser, other entity | 2.7M | 4.3% | 2025-09-30 |
| 2025-11-13 | 13G/Ano. 1 | Stonepine Capital, L.P.partnership | 2.7M | 4.3% | 2025-09-30 |
| 2025-11-13 | 13G/Ano. 1 | Stonepine GP, LLCother entity | 2.7M | 4.3% | 2025-09-30 |
| 2025-11-13 | 13G/Ano. 1 | Jon M. Plexicoparent holding company, individual | 2.7M | 4.3% | 2025-09-30 |
13F holders
Tracked managers holding VSTM at their latest 13F. JSON4 of the 30 tracked managers held VSTM at their latest 13F, $12.9M in total at quarter-end prices. Millennium Management is the largest at $7.9M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 3 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Millennium Management | 2026-06-30 | 2.1M | $7.9M | 0.00% | -334K |
| AQR Capital Management | 2026-06-30 | 935K | $3.6M | 0.00% | +869K |
| Citadel Advisors | 2026-06-30 | 317K | $1.2M | 0.00% | -2.0M |
| Two Sigma Investments | 2026-06-30 | 50K | $191K | 0.00% | -617K |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
Verastem in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows Verastem (VSTM), SEC CIK 1526119, listed on Nasdaq, classified by the SEC as pharmaceutical preparations. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-23.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-08.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-10-01.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-08-14.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-10-14.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-10-01.JSON and CSV
- Company record
- EDGAR filing index for CIK 1526119Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as pharmaceutical preparations
Other company pages
Datasets
Frequently Asked Questions
How much of VSTM is sold short?
14,964,825 shares were held short at the 2026-09-30 settlement, 7.0 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is VSTM's daily short volume?
On 2026-10-23, 1,085,568 of the 1,674,869 VSTM shares reported to FINRA were sold short, 64.8% of the day's reported volume. Short volume is a flow for one day, not a position.
Does VSTM have fails to deliver?
The SEC's latest file shows 5,469 VSTM shares failed to deliver at settlement 2026-09-08. Fails are reported per settlement date and published twice a month with a lag.
Are VSTM insiders buying or selling?
Insiders at VSTM reported 4 open-market sells worth $381K in the last 90 days and no open-market buys. Latest filing: Paterson Dan (President and CEO) on 2026-10-01.
Have VSTM insiders filed to sell?
12 Form 144 notices on file for VSTM worth $1.3M at the prices reported; 1 in the last 90 days worth $353K. Latest: Dan Paterson filed on 2026-10-01 to sell 44,121 shares ($353K) from 2026-10-01.
Who owns 5% or more of VSTM?
10 holders report 5% or more of VSTM in their latest filing, all on Schedule 13G (passive). The largest reported stake is Deep Track Capital, LP at 10.0% of the class (7,719,390 shares), filed 2025-11-21 for an event on 2025-11-14.
Which tracked 13F managers own VSTM?
4 of the 30 tracked 13F managers held VSTM shares at their latest filing, $12.9M in all. The largest: Izzy Englander's Millennium Management (2.1M shares, $7.9M), Cliff Asness's AQR Capital Management (935K shares, $3.6M), Ken Griffin's Citadel Advisors (317K shares, $1.2M), Two Sigma Investments (50K shares, $191K).
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.