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Verastem, Inc. (VSTM) institutional ownership

Latest close $6.00 Jul 21, 2026
Market cap$566M 52-week range SectorHealthcare
Funds holding · Q3 2025
1
reported VSTM position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q3 2025
Activity unavailable N/A
0 buyers · 1 sellers

Verastem, Inc. (VSTM) price and institutional activity

Dates

Q3 2025

$0 bought by 0 investors
$0 sold by 1 investors
Accent Capital Management, LLC
Bought Sold Totals per quarter; hover a bar for the names.

Verastem, Inc. (VSTM) institutional activity · 1

Investor Type Est. change Change Δ Own Date
Accent Capital Management, LLC · Exited
Change −52 Δ Own −100.0% Date Q3 2025
Accent Capital Management, LLC Exited· Q3 2025 −52 −100.0% Q3 2025
Data through Q3 2025 · filed Q3 2025
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Famous investor activity in Verastem, Inc. (VSTM)

Verastem, Inc. (VSTM) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Paterson Dan · Director Sell −$87K
Price $4.18 Qty −21K Owned 591K ΔOwn −3.4% Trade date Jun 22, 2026 Filed date Jun 24, 2026
Paterson Dan Director Sell $4.18 −21K −$87K 591K −3.4% Jun 22, 2026 Jun 24, 2026
Calkins Daniel · Officer 2 operations −$17K
Price $4.13–$4.18 Qty −4K Owned 117K ΔOwn −3.4% Trade date Jun 22, 2026 Filed date Jun 24, 2026
Calkins Daniel Officer 2 operations $4.13–$4.18 −4K −$17K 117K −3.4% Jun 22, 2026 Jun 24, 2026
Bailey Michael P. · Director Grant (A) 108K
Owned 108K Trade date May 21, 2026 Filed date May 27, 2026
Bailey Michael P. Director Grant (A) 108K 108K May 21, 2026 May 27, 2026
Tollefson Karin Anna · Director Grant (A) 36K
Owned 53K Trade date May 21, 2026 Filed date May 26, 2026
Tollefson Karin Anna Director Grant (A) 36K 53K May 21, 2026 May 26, 2026
Stuglik Brian M. · Director Grant (A) 36K
Owned 137K Trade date May 21, 2026 Filed date May 26, 2026
Stuglik Brian M. Director Grant (A) 36K 137K May 21, 2026 May 26, 2026
Rowinsky Eric K. · Director Grant (A) 36K
Owned 53K Trade date May 21, 2026 Filed date May 26, 2026
Rowinsky Eric K. Director Grant (A) 36K 53K May 21, 2026 May 26, 2026
Robertson Michelle · Director Grant (A) 36K
Owned 53K Trade date May 21, 2026 Filed date May 26, 2026
Robertson Michelle Director Grant (A) 36K 53K May 21, 2026 May 26, 2026
Kapur Anil · Director Grant (A) 36K
Owned 53K Trade date May 21, 2026 Filed date May 26, 2026
Kapur Anil Director Grant (A) 36K 53K May 21, 2026 May 26, 2026
Bunn Paul A. · Director Grant (A) 36K
Owned 44K Trade date May 21, 2026 Filed date May 26, 2026
Bunn Paul A. Director Grant (A) 36K 44K May 21, 2026 May 26, 2026
Johnson John · Director Grant (A) 36K
Owned 53K Trade date May 21, 2026 Filed date May 26, 2026
Johnson John Director Grant (A) 36K 53K May 21, 2026 May 26, 2026
Paterson Dan · Director Sell −$5K
Price $5.82 Qty −806 Owned 612K Trade date May 4, 2026 Filed date May 6, 2026
Paterson Dan Director Sell $5.82 −806 −$5K 612K May 4, 2026 May 6, 2026
Calkins Daniel · Officer Grant (A) -$327
Price $5.74 Qty -57 Owned 121K Trade date Mar 20, 2026 Filed date Mar 23, 2026
Calkins Daniel Officer Grant (A) $5.74 -57 -$327 121K Mar 20, 2026 Mar 23, 2026
Paterson Dan · Director, Officer Sell −$6K
Price $6.69 Qty −970 Owned 613K Trade date Feb 4, 2026 Filed date Feb 5, 2026
Paterson Dan Director, Officer Sell $6.69 −970 −$6K 613K Feb 4, 2026 Feb 5, 2026
Calkins Daniel · Officer Grant (A) 17K
Owned 121K Trade date Jan 21, 2026 Filed date Jan 23, 2026
Calkins Daniel Officer Grant (A) 17K 121K Jan 21, 2026 Jan 23, 2026
Paterson Dan · Director, Officer Grant (A) 214K
Owned 614K Trade date Jan 21, 2026 Filed date Jan 23, 2026
Paterson Dan Director, Officer Grant (A) 214K 614K Jan 21, 2026 Jan 23, 2026
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Verastem, Inc. (VSTM) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Rtw Investments, LP 9.0M
% of shares outstanding 9.9% Filing date May 15, 2026
Rtw Investments, LP 9.0M 9.9% May 15, 2026
Armistice Capital, LLC 4.6M
% of shares outstanding 5.2% Filing date May 15, 2026
Armistice Capital, LLC 4.6M 5.2% May 15, 2026
Polar Capital Holdings PLC 3.7M
% of shares outstanding 4.8% Filing date Jul 8, 2026
Polar Capital Holdings PLC 3.7M 4.8% Jul 8, 2026
Foresite Capital Fund VI LP 3.1M
% of shares outstanding 3.6% Filing date May 15, 2026
Foresite Capital Fund VI LP 3.1M 3.6% May 15, 2026
Balyasny Asset Management L.P. 1.4M
% of shares outstanding 1.6% Filing date May 15, 2026
Balyasny Asset Management L.P. 1.4M 1.6% May 15, 2026
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Verastem, Inc. (VSTM) ownership FAQ

Who owns VSTM?

1 reporting institutions disclosed VSTM position changes in the Q3 2025 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q3 2025.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.