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United States Biotechnology & Medical Research

Verastem Inc (VSTM)

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Over the last 90 days, Verastem Inc. has seen a net insider selling of $4,690.92, with one executive selling shares. Notable transactions include a proposed sale of $87,649.08 by Director Robert E. Gagnon and a sale of $4,690.92 by President and CEO Dan Paterson. The company's stock has experienced a 32.2% decrease in the past 90 days.
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Ticker: VSTM Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Gagnon Robert E.
Director
1 sale — total 87,649 USD
Proposed sale 27 May 2026
Value US$882,775.00 | Price 100.68 | Shares 57,238
Sale 4 May 2026
Value US$10,449.23 | Price 149.20 | Shares 71,526
Sale 4 Feb 2026
Value US$6,489.30 | Price 6.69 | Shares 970
Proposed sale 12 Jan 2026
Value US$36,069.00 | Price 7.16 | Shares 5,039
Proposed sale 12 Jan 2026
Value US$73,851.00 | Price 7.16 | Shares 10,321
Sale 12 Jan 2026
Value US$73,898.36 | Price 7.16 | Shares 10,321
Sale 12 Jan 2026
Value US$36,079.24 | Price 7.16 | Shares 5,039
Sale 24 Dec 2025
Value US$628.80 | Price 7.86 | Shares 80
Sale 16 Dec 2025
Value US$2,586.62 | Price 9.14 | Shares 283
Sale 16 Dec 2025
Value US$5,410.88 | Price 9.14 | Shares 592
Sale 16 Dec 2025
Value US$3,592.02 | Price 9.14 | Shares 393
Planned sale 11 Dec 2025
Value US$20,000.00 | Price 10.00 | Shares 2,000
Planned sale 10 Dec 2025
Value US$20,140.00 | Price 10.07 | Shares 2,000
Proposed sale 9 Dec 2025
Value US$80,003.00 | Price 10.27 | Shares 7,790
Planned sale 9 Dec 2025
Value US$20,500.00 | Price 10.25 | Shares 2,000
Planned sale 8 Dec 2025
Value US$21,000.00 | Price 10.50 | Shares 2,000
Proposed sale 5 Dec 2025
Value US$117,900.00 | Price 10.00 | Shares 11,790
Planned sale 5 Dec 2025
Value US$21,220.00 | Price 10.61 | Shares 2,000
Planned sale 4 Dec 2025
Value US$20,000.00 | Price 10.00 | Shares 2,000
Planned sale 3 Dec 2025
Value US$20,000.00 | Price 10.00 | Shares 2,000
Planned sale 2 Dec 2025
Value US$20,640.00 | Price 10.32 | Shares 2,000
Planned sale 1 Dec 2025
Value US$20,780.00 | Price 10.39 | Shares 2,000
Planned sale 28 Nov 2025
Value US$21,580.00 | Price 10.79 | Shares 2,000
Planned sale 26 Nov 2025
Value US$20,640.00 | Price 10.32 | Shares 2,000
Planned sale 25 Nov 2025
Value US$20,000.00 | Price 10.00 | Shares 2,000
Planned sale 24 Nov 2025
Value US$20,000.00 | Price 10.00 | Shares 2,000
Planned sale 21 Nov 2025
Value US$20,000.00 | Price 10.00 | Shares 2,000
Planned sale 21 Nov 2025
Value US$62,500.00 | Price 10.00 | Shares 6,250
Proposed sale 21 Nov 2025
Value US$61,312.50 | Price 9.81 | Shares 6,250
Planned sale 21 Nov 2025
Value US$85,500.00 | Price 10.00 | Shares 8,550
Proposed sale 21 Nov 2025
Value US$83,875.50 | Price 9.81 | Shares 8,550
Planned sale 3 Nov 2025
Value US$20,000.00 | Price 10.00 | Shares 2,000
Sale 3 Nov 2025
Value US$12,145.65 | Price 9.35 | Shares 1,299
Planned sale 9 Oct 2025
Value US$75,496.98 | Price 9.06 | Shares 8,333
Proposed sale 9 Oct 2025
Value US$74,497.02 | Price 8.94 | Shares 8,333
Sale 24 Sep 2025
Value US$230.75 | Price 9.23 | Shares 25
Sale 22 Sep 2025
Value US$517.56 | Price 9.08 | Shares 57
Proposed sale 17 Sep 2025
Value US$310,429.00 | Price 9.76 | Shares 31,790
Sale 16 Sep 2025
Value US$3,896.10 | Price 9.99 | Shares 390
Sale 16 Sep 2025
Value US$2,807.19 | Price 9.99 | Shares 281
Sale 16 Sep 2025
Value US$5,864.13 | Price 9.99 | Shares 587
Sale 6 Aug 2025
Value US$7,738.92 | Price 5.81 | Shares 1,332
Sale 23 Jun 2025
Value US$117.75 | Price 4.71 | Shares 25
Sale 20 Jun 2025
Value US$91,355.04 | Price 5.13 | Shares 17,808
Sale 20 Jun 2025
Value US$21,084.30 | Price 5.13 | Shares 4,110
Proposed sale 20 Jun 2025
Value US$91,334.00 | Price 5.13 | Shares 17,808
Sale 16 Jun 2025
Value US$1,892.75 | Price 5.65 | Shares 335
Sale 16 Jun 2025
Value US$3,356.10 | Price 5.65 | Shares 594
Sale 16 Jun 2025
Value US$1,604.60 | Price 5.65 | Shares 284
Proposed sale 20 May 2025
Value US$90,293.00 | Price 8.10 | Shares 11,143
Proposed sale 20 May 2025
Value US$477,044.00 | Price 8.13 | Shares 58,677
Sale 20 May 2025
Value US$90,592.59 | Price 8.13 | Shares 11,143
Sale 20 May 2025
Value US$477,044.01 | Price 8.13 | Shares 58,677
Sale 5 May 2025
Value US$5,986.00 | Price 7.30 | Shares 820
Sale 24 Mar 2025
Value US$183.04 | Price 7.04 | Shares 26
Sale 20 Mar 2025
Value US$447.85 | Price 6.89 | Shares 65
Sale 17 Mar 2025
Value US$1,695.80 | Price 6.95 | Shares 244
Sale 17 Mar 2025
Value US$4,121.35 | Price 6.95 | Shares 593
Sale 17 Mar 2025
Value US$1,973.80 | Price 6.95 | Shares 284
Sale 4 Feb 2025
Value US$4,890.60 | Price 5.70 | Shares 858
Sale 13 Jan 2025
Value US$44,896.32 | Price 5.24 | Shares 8,568
Proposed sale 13 Jan 2025
Value US$44,909.00 | Price 5.24 | Shares 8,568
Planned sale 6 Jan 2025
Value US$41.64 | Price 6.94 | Shares 6
Sale 24 Dec 2024
Value US$109.48 | Price 3.91 | Shares 28
Sale 20 Dec 2024
Value US$282.10 | Price 4.34 | Shares 65
Sale 19 Dec 2024
Value US$799.71 | Price 4.37 | Shares 183
Sale 19 Dec 2024
Value US$1,459.58 | Price 4.37 | Shares 334
Sale 19 Dec 2024
Value US$568.10 | Price 4.37 | Shares 130
Sale 16 Dec 2024
Value US$1,107.76 | Price 4.54 | Shares 244
Sale 16 Dec 2024
Value US$2,701.30 | Price 4.54 | Shares 595
Sale 16 Dec 2024
Value US$1,293.90 | Price 4.54 | Shares 285
Sale 5 Nov 2024
Value US$3,118.08 | Price 3.84 | Shares 812
Sale 7 Oct 2024
Value US$17.16 | Price 2.86 | Shares 6
Sale 24 Sep 2024
Value US$75.04 | Price 2.68 | Shares 28
Sale 20 Sep 2024
Value US$182.00 | Price 2.80 | Shares 65
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-05-27 2026-05-27 PrS Proposed sale
3.1
Gagnon Robert E.

Director

Non-Executive Director
57,238
100.68
US$882,775 		57,238 100.68 US$882,775
2026-05-06 2026-05-04 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
71,526 +49.9%
149.20
US$10,449 		71,526 +49.9% 149.20 US$10,449
2026-02-05 2026-02-04 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
23,034 +38.5%
177.30
US$4,124,875 		23,034 +38.5% 177.30 US$4,124,875
2026-01-14 2026-01-12 PrS Proposed sale
3.4
Dan Paterson

Officer

Officer
5,039
7.16
US$36,069 		5,039 7.16 US$36,069
2026-01-14 2026-01-12 PrS Proposed sale
3.4
Dan Paterson

Officer, Director

Executive Director
10,321
7.16
US$73,851 		10,321 7.16 US$73,851
2026-01-14 2026-01-12 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
10,321 -2.5%
7.16
US$73,898 		10,321 -2.5% 7.16 US$73,898
2026-01-14 2026-01-12 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
5,039 -4.6%
7.16
US$36,079 		5,039 -4.6% 7.16 US$36,079
2025-12-29 2025-12-24 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
80 -0.1%
7.86
US$629 		80 -0.1% 7.86 US$629
2025-12-18 2025-12-16 S Sale
3.1
Gagnon Robert E.
Non-Executive Director
283 -0.7%
9.14
US$2,587 		283 -0.7% 9.14 US$2,587
2025-12-18 2025-12-16 S Sale
4.1
Stuglik Brian M
Non-Executive Director
592 -0.6%
9.14
US$5,411 		592 -0.6% 9.14 US$5,411
2025-12-18 2025-12-16 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
393 -0.1%
9.14
US$3,592 		393 -0.1% 9.14 US$3,592
2025-12-12 2025-12-11 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.00
US$20,000 		2,000 -0.5% 10.00 US$20,000
2025-12-12 2025-12-10 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.07
US$20,140 		2,000 -0.5% 10.07 US$20,140
2025-12-09 2025-12-09 PrS Proposed sale
3.4
Paterson Dan

Officer

Officer
7,790
10.27
US$80,003 		7,790 10.27 US$80,003
2025-12-09 2025-12-09 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.25
US$20,500 		2,000 -0.5% 10.25 US$20,500
2025-12-09 2025-12-08 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.50
US$21,000 		2,000 -0.5% 10.50 US$21,000
2025-12-10 2025-12-05 PrS Proposed sale
3.4
Paterson Dan

Officer

Officer
11,790
10.00
US$117,900 		11,790 10.00 US$117,900
2025-12-09 2025-12-05 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.61
US$21,220 		2,000 -0.5% 10.61 US$21,220
2025-12-04 2025-12-04 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.00
US$20,000 		2,000 -0.5% 10.00 US$20,000
2025-12-04 2025-12-03 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.00
US$20,000 		2,000 -0.5% 10.00 US$20,000
2025-12-04 2025-12-02 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.32
US$20,640 		2,000 -0.5% 10.32 US$20,640
2025-12-01 2025-12-01 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.39
US$20,780 		2,000 -0.5% 10.39 US$20,780
2025-12-01 2025-11-28 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.79
US$21,580 		2,000 -0.5% 10.79 US$21,580
2025-12-01 2025-11-26 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.32
US$20,640 		2,000 -0.5% 10.32 US$20,640
2025-11-25 2025-11-25 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.00
US$20,000 		2,000 -0.5% 10.00 US$20,000
2025-11-25 2025-11-24 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.00
US$20,000 		2,000 -0.5% 10.00 US$20,000
2025-11-25 2025-11-21 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.00
US$20,000 		2,000 -0.5% 10.00 US$20,000
2025-11-25 2025-11-21 PlS Planned sale
Bunn Paul A.
Non-Executive Director
6,250 -75.0%
10.00
US$62,500 		6,250 -75.0% 10.00 US$62,500
2025-11-25 2025-11-21 PlS Planned sale
3.9
Kauffman Michael
Non-Executive Director
8,550 -49.7%
10.00
US$85,500 		8,550 -49.7% 10.00 US$85,500
2025-11-21 2025-11-21 PrS Proposed sale
3.9
Kauffman Michael

Board Member
8,550
9.81
US$83,876 		8,550 9.81 US$83,876
2025-11-21 2025-11-21 PrS Proposed sale
Bunn Paul A.

Board Member
6,250
9.81
US$61,312 		6,250 9.81 US$61,312
2025-11-06 2025-11-03 PlS Planned sale
3.4
Paterson Dan

President and CEO

Executive Director
2,000 -0.5%
10.00
US$20,000 		2,000 -0.5% 10.00 US$20,000
2025-11-06 2025-11-03 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
1,299 -0.3%
9.35
US$12,146 		1,299 -0.3% 9.35 US$12,146
2025-10-14 2025-10-09 PlS Planned sale
Bunn Paul A.
Non-Executive Director
8,333 -50.0%
9.06
US$75,497 		8,333 -50.0% 9.06 US$75,497
2025-10-09 2025-10-09 PrS Proposed sale
Bunn Paul A.

Board Member
8,333
8.94
US$74,497 		8,333 8.94 US$74,497
2025-09-24 2025-09-24 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
25 -0.0%
9.23
US$231 		25 -0.0% 9.23 US$231
2025-09-24 2025-09-22 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
57 -0.1%
9.08
US$518 		57 -0.1% 9.08 US$518
2025-09-04 2025-09-17 PrS Proposed sale
3.4
Paterson Dan

Officer; Director

Executive Director
31,790
9.76
US$310,429 		31,790 9.76 US$310,429
2025-09-18 2025-09-16 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
390 -0.1%
9.99
US$3,896 		390 -0.1% 9.99 US$3,896
2025-09-18 2025-09-16 S Sale
3.1
Gagnon Robert E.
Non-Executive Director
281 -0.7%
9.99
US$2,807 		281 -0.7% 9.99 US$2,807
2025-09-18 2025-09-16 S Sale
4.1
Stuglik Brian M
Non-Executive Director
587 -0.6%
9.99
US$5,864 		587 -0.6% 9.99 US$5,864
2025-08-06 2025-08-06 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
1,332 -0.3%
5.81
US$7,739 		1,332 -0.3% 5.81 US$7,739
2025-06-24 2025-06-23 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
25 -0.0%
4.71
US$118 		25 -0.0% 4.71 US$118
2025-06-24 2025-06-20 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
17,808 -3.9%
5.13
US$91,355 		17,808 -3.9% 5.13 US$91,355
2025-06-24 2025-06-20 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
4,110 -3.6%
5.13
US$21,084 		4,110 -3.6% 5.13 US$21,084
2025-06-20 2025-06-20 PrS Proposed sale
3.4
Dan Paterson

Officer; Director

Executive Director
17,808
5.13
US$91,334 		17,808 5.13 US$91,334
2025-06-20 2025-06-16 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
335 -0.1%
5.65
US$1,893 		335 -0.1% 5.65 US$1,893
2025-06-20 2025-06-16 S Sale
4.1
Stuglik Brian M
Non-Executive Director
594 -0.6%
5.65
US$3,356 		594 -0.6% 5.65 US$3,356
2025-06-20 2025-06-16 S Sale
3.1
Gagnon Robert E.
Non-Executive Director
284 -0.7%
5.65
US$1,605 		284 -0.7% 5.65 US$1,605
2025-05-20 2025-05-20 PrS Proposed sale
3.4
Daniel Calkins

Officer

Officer
11,143
8.10
US$90,293 		11,143 8.10 US$90,293
2025-05-20 2025-05-20 PrS Proposed sale
3.4
Dan Paterson

Officer, Director

Executive Director
58,677
8.13
US$477,044 		58,677 8.13 US$477,044
2025-05-20 2025-05-20 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
11,143 -8.9%
8.13
US$90,593 		11,143 -8.9% 8.13 US$90,593
2025-05-20 2025-05-20 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
58,677 -11.3%
8.13
US$477,044 		58,677 -11.3% 8.13 US$477,044
2025-05-07 2025-05-05 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
820 -0.2%
7.30
US$5,986 		820 -0.2% 7.30 US$5,986
2025-03-24 2025-03-24 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
26 -0.0%
7.04
US$183 		26 -0.0% 7.04 US$183
2025-03-24 2025-03-20 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
65 -0.1%
6.89
US$448 		65 -0.1% 6.89 US$448
2025-03-19 2025-03-17 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
244 -0.1%
6.95
US$1,696 		244 -0.1% 6.95 US$1,696
2025-03-19 2025-03-17 S Sale
4.1
Stuglik Brian M
Non-Executive Director
593 -0.6%
6.95
US$4,121 		593 -0.6% 6.95 US$4,121
2025-03-19 2025-03-17 S Sale
3.1
Gagnon Robert E.
Non-Executive Director
284 -0.8%
6.95
US$1,974 		284 -0.8% 6.95 US$1,974
2025-02-05 2025-02-04 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
858 -0.2%
5.70
US$4,891 		858 -0.2% 5.70 US$4,891
2025-01-14 2025-01-13 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
8,568 -2.4%
5.24
US$44,896 		8,568 -2.4% 5.24 US$44,896
2025-01-13 2025-01-13 PrS Proposed sale
3.4
Dan Paterson

Officer, Director

Executive Director
8,568
5.24
US$44,909 		8,568 5.24 US$44,909
2025-01-08 2025-01-06 PlS Planned sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
6 -0.0%
6.94
US$42 		6 -0.0% 6.94 US$42
2024-12-26 2024-12-24 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
28 -0.1%
3.91
US$109 		28 -0.1% 3.91 US$109
2024-12-26 2024-12-20 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
65 -0.1%
4.34
US$282 		65 -0.1% 4.34 US$282
2024-12-20 2024-12-19 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
183 -0.1%
4.37
US$800 		183 -0.1% 4.37 US$800
2024-12-20 2024-12-19 S Sale
4.1
Stuglik Brian M
Non-Executive Director
334 -0.3%
4.37
US$1,460 		334 -0.3% 4.37 US$1,460
2024-12-20 2024-12-19 S Sale
3.1
Gagnon Robert E.
Non-Executive Director
130 -0.4%
4.37
US$568 		130 -0.4% 4.37 US$568
2024-12-20 2024-12-16 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
244 -0.1%
4.54
US$1,108 		244 -0.1% 4.54 US$1,108
2024-12-20 2024-12-16 S Sale
4.1
Stuglik Brian M
Non-Executive Director
595 -0.6%
4.54
US$2,701 		595 -0.6% 4.54 US$2,701
2024-12-20 2024-12-16 S Sale
3.1
Gagnon Robert E.
Non-Executive Director
285 -0.8%
4.54
US$1,294 		285 -0.8% 4.54 US$1,294
2024-11-07 2024-11-05 S Sale
3.4
Paterson Dan

President and CEO

Executive Director
812 -0.3%
3.84
US$3,118 		812 -0.3% 3.84 US$3,118
2024-10-09 2024-10-07 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
6 -0.0%
2.86
US$17 		6 -0.0% 2.86 US$17
2024-09-24 2024-09-24 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
28 -0.1%
2.68
US$75 		28 -0.1% 2.68 US$75
2024-09-24 2024-09-20 S Sale
3.4
Calkins Daniel

Chief Financial Officer

Officer
65 -0.1%
2.80
US$182 		65 -0.1% 2.80 US$182
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