Verastem Inc. Insider Trading

VSTM

Last 12 months

Insiders sold $1.05M and bought nothing on the open market.

All of the selling was scheduled in advance under 10b5-1 plans. The last open-market buy by an executive or director was in Jan 2024.

Net open-market

−$1.05M

0 buys · 21 sales

Under a 10b5-1 plan

100%

of the value sold

Insiders who bought / sold

0 / 6

executives and directors

Last open-market buy

Jan 2024

Jan 24, 2024

Get an email when VSTM's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 1	Dan Paterson President and CEO	Sold10b5-1 plan	44,121	$8.00	353K	6.3%	Form 4
Oct 1	Daniel Calkins Chief Financial Officer	Sold10b5-1 plan	2,566	$8.00	21K	2.0%	Form 4
Sep 21	Daniel Calkins Chief Financial Officer	Sold10b5-1 plan	55	$7.70	$424	<0.1%	Form 4
Aug 3	Dan Paterson President and CEO	Sold10b5-1 plan	1,302	$5.81	8K	0.2%	Form 4
Jun 22	Dan Paterson President and CEO	Sold10b5-1 plan	20,871	$4.18	87K	3.4%	Form 4
Jun 22	Daniel Calkins Chief Financial Officer	Sold10b5-1 plan 2 parts	4,089	$4.18 average	17K	3.4%	Form 4
May 4	Dan Paterson President and CEO	Sold10b5-1 plan	806	$5.82	5K	0.1%	Form 4
Feb 4	Dan Paterson President and CEO	Sold10b5-1 plan	970	$6.69	6K	0.2%	Form 4
Jan 12	Dan Paterson President and CEO	Sold10b5-1 plan	10,321	$7.16	74K	2.5%	Form 4
Jan 12	Daniel Calkins Chief Financial Officer	Sold10b5-1 plan	5,039	$7.16	36K	4.6%	Form 4
Dec 24, 2025	Daniel Calkins Chief Financial Officer	Sold10b5-1 plan	80	$7.86	$629	<0.1%	Form 4
Dec 16, 2025	Brian M Stuglik Director	Sold10b5-1 plan	592	$9.14	5K	0.6%	Form 4
Dec 16, 2025	Dan Paterson President and CEO	Sold10b5-1 plan	393	$9.14	4K	<0.1%	Form 4
Dec 16, 2025	Robert E. Gagnon Director	Sold10b5-1 plan	283	$9.14	3K	0.7%	Form 4
Dec 10, 2025 – Dec 11, 2025	Dan Paterson President and CEO	Sold10b5-1 plan 2 parts	4,000	$10.04 average	40K	1.0%	Form 4
Dec 5, 2025 – Dec 9, 2025	Dan Paterson President and CEO	Sold10b5-1 plan 3 parts	6,000	$10.45 average	63K	1.4%	Form 4
Dec 2, 2025 – Dec 4, 2025	Dan Paterson President and CEO	Sold10b5-1 plan 3 parts	6,000	$10.11 average	61K	1.4%	Form 4
Nov 26, 2025 – Dec 1, 2025	Dan Paterson President and CEO	Sold10b5-1 plan 3 parts	6,000	$10.50 average	63K	1.4%	Form 4
Nov 21, 2025 – Nov 25, 2025	Dan Paterson President and CEO	Sold10b5-1 plan 3 parts	6,000	$10.00 average	60K	1.4%	Form 4
Nov 21, 2025	Paul A. Bunn Director	Sold10b5-1 plan	6,250	$10.00	63K	43%	Form 4
Nov 21, 2025	Michael Kauffman Director	Sold10b5-1 plan	8,550	$10.00	86K	50%	Form 4
Nov 3, 2025	Dan Paterson President and CEO	Sold10b5-1 plan 2 parts	3,299	$9.74 average	32K	0.7%	Form 4
Oct 9, 2025	Paul A. Bunn Director	Sold10b5-1 plan	8,333	$9.06	75K	50%	Form 4
Sep 22, 2025 – Sep 24, 2025	Daniel Calkins Chief Financial Officer	Sold10b5-1 plan 2 parts	82	$9.13 average	$748	<0.1%	Form 4
Sep 16, 2025	Brian M Stuglik Director	Sold10b5-1 plan	587	$9.99	6K	0.6%	Form 4
Sep 16, 2025	Robert E. Gagnon Director	Sold10b5-1 plan	281	$9.99	3K	0.7%	Form 4
Sep 16, 2025	Dan Paterson President and CEO	Sold10b5-1 plan	390	$9.99	4K	<0.1%	Form 4
Aug 6, 2025	Dan Paterson President and CEO	Sold10b5-1 plan	1,332	$5.81	8K	0.3%	Form 4
Jun 20, 2025 – Jun 23, 2025	Daniel Calkins Chief Financial Officer	Sold10b5-1 plan 2 parts	4,135	$5.13 average	21K	3.6%	Form 4
Jun 20, 2025	Dan Paterson President and CEO	Sold10b5-1 plan	17,808	$5.13	91K	3.9%	Form 4
Jun 16, 2025	Dan Paterson President and CEO	SoldNo plan	335	$5.65	2K	<0.1%	Form 4
Jun 16, 2025	Robert E. Gagnon Director	SoldNo plan	284	$5.65	2K	0.7%	Form 4
Jun 16, 2025	Brian M Stuglik Director	SoldNo plan	594	$5.65	3K	0.6%	Form 4
May 20, 2025	Daniel Calkins Chief Financial Officer	Sold10b5-1 plan	11,143	$8.13	91K	8.9%	Form 4
May 20, 2025	Dan Paterson President and CEO	Sold10b5-1 plan	58,677	$8.13	477K	11%	Form 4
May 5, 2025	Dan Paterson President and CEO	SoldNo plan	820	$7.30	6K	0.2%	Form 4
Mar 20, 2025 – Mar 24, 2025	Daniel Calkins Chief Financial Officer	SoldNo plan 2 parts	91	$6.93 average	$631	0.1%	Form 4
Mar 17, 2025	Dan Paterson President and CEO	SoldNo plan	244	$6.95	2K	<0.1%	Form 4
Mar 17, 2025	Robert E. Gagnon Director	SoldNo plan	284	$6.95	2K	0.8%	Form 4
Mar 17, 2025	Brian M Stuglik Director	SoldNo plan	593	$6.95	4K	0.6%	Form 4

Oct 110b5-1 plan
Dan Paterson
President and CEO · sold 44,121 at $8.00
353K
6.3% of stake
Oct 110b5-1 plan
Daniel Calkins
Chief Financial Officer · sold 2,566 at $8.00
21K
2.0% of stake
Sep 2110b5-1 plan
Daniel Calkins
Chief Financial Officer · sold 55 at $7.70
$424
<0.1% of stake
Aug 310b5-1 plan
Dan Paterson
President and CEO · sold 1,302 at $5.81
8K
0.2% of stake
Jun 2210b5-1 plan
Dan Paterson
President and CEO · sold 20,871 at $4.18
87K
3.4% of stake
Jun 2210b5-1 plan
Daniel Calkins
Chief Financial Officer · sold 4,089 at avg $4.18
17K
3.4% of stake
May 410b5-1 plan
Dan Paterson
President and CEO · sold 806 at $5.82
5K
0.1% of stake
Feb 410b5-1 plan
Dan Paterson
President and CEO · sold 970 at $6.69
6K
0.2% of stake
Jan 1210b5-1 plan
Dan Paterson
President and CEO · sold 10,321 at $7.16
74K
2.5% of stake
Jan 1210b5-1 plan
Daniel Calkins
Chief Financial Officer · sold 5,039 at $7.16
36K
4.6% of stake
Dec 24, 202510b5-1 plan
Daniel Calkins
Chief Financial Officer · sold 80 at $7.86
$629
<0.1% of stake
Dec 16, 202510b5-1 plan
Brian M Stuglik
Director · sold 592 at $9.14
5K
0.6% of stake
Dec 16, 202510b5-1 plan
Dan Paterson
President and CEO · sold 393 at $9.14
4K
<0.1% of stake
Dec 16, 202510b5-1 plan
Robert E. Gagnon
Director · sold 283 at $9.14
3K
0.7% of stake
Dec 10, 2025 – Dec 11, 202510b5-1 plan
Dan Paterson
President and CEO · sold 4,000 at avg $10.04
40K
1.0% of stake
Dec 5, 2025 – Dec 9, 202510b5-1 plan
Dan Paterson
President and CEO · sold 6,000 at avg $10.45
63K
1.4% of stake
Dec 2, 2025 – Dec 4, 202510b5-1 plan
Dan Paterson
President and CEO · sold 6,000 at avg $10.11
61K
1.4% of stake
Nov 26, 2025 – Dec 1, 202510b5-1 plan
Dan Paterson
President and CEO · sold 6,000 at avg $10.50
63K
1.4% of stake
Nov 21, 2025 – Nov 25, 202510b5-1 plan
Dan Paterson
President and CEO · sold 6,000 at avg $10.00
60K
1.4% of stake
Nov 21, 202510b5-1 plan
Paul A. Bunn
Director · sold 6,250 at $10.00
63K
43% of stake
Nov 21, 202510b5-1 plan
Michael Kauffman
Director · sold 8,550 at $10.00
86K
50% of stake
Nov 3, 202510b5-1 plan
Dan Paterson
President and CEO · sold 3,299 at avg $9.74
32K
0.7% of stake
Oct 9, 202510b5-1 plan
Paul A. Bunn
Director · sold 8,333 at $9.06
75K
50% of stake
Sep 22, 2025 – Sep 24, 202510b5-1 plan
Daniel Calkins
Chief Financial Officer · sold 82 at avg $9.13
$748
<0.1% of stake
Sep 16, 202510b5-1 plan
Brian M Stuglik
Director · sold 587 at $9.99
6K
0.6% of stake
Sep 16, 202510b5-1 plan
Robert E. Gagnon
Director · sold 281 at $9.99
3K
0.7% of stake
Sep 16, 202510b5-1 plan
Dan Paterson
President and CEO · sold 390 at $9.99
4K
<0.1% of stake
Aug 6, 202510b5-1 plan
Dan Paterson
President and CEO · sold 1,332 at $5.81
8K
0.3% of stake
Jun 20, 2025 – Jun 23, 202510b5-1 plan
Daniel Calkins
Chief Financial Officer · sold 4,135 at avg $5.13
21K
3.6% of stake
Jun 20, 202510b5-1 plan
Dan Paterson
President and CEO · sold 17,808 at $5.13
91K
3.9% of stake
Jun 16, 2025No plan
Dan Paterson
President and CEO · sold 335 at $5.65
2K
<0.1% of stake
Jun 16, 2025No plan
Robert E. Gagnon
Director · sold 284 at $5.65
2K
0.7% of stake
Jun 16, 2025No plan
Brian M Stuglik
Director · sold 594 at $5.65
3K
0.6% of stake
May 20, 202510b5-1 plan
Daniel Calkins
Chief Financial Officer · sold 11,143 at $8.13
91K
8.9% of stake
May 20, 202510b5-1 plan
Dan Paterson
President and CEO · sold 58,677 at $8.13
477K
11% of stake
May 5, 2025No plan
Dan Paterson
President and CEO · sold 820 at $7.30
6K
0.2% of stake
Mar 20, 2025 – Mar 24, 2025No plan
Daniel Calkins
Chief Financial Officer · sold 91 at avg $6.93
$631
0.1% of stake
Mar 17, 2025No plan
Dan Paterson
President and CEO · sold 244 at $6.95
2K
<0.1% of stake
Mar 17, 2025No plan
Robert E. Gagnon
Director · sold 284 at $6.95
2K
0.8% of stake
Mar 17, 2025No plan
Brian M Stuglik
Director · sold 593 at $6.95
4K
0.6% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch VSTM, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

VSTM is in 13 US ETFs. The largest of them, with VSTM's weight in each:

Spot a number that looks wrong? Check it in VSTM's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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