Verastem, Inc.
Verastem, Inc. (VSTM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · VSTM · as of Sep 30, 2025
Ownership Breakdown
123
Institutional Holders
▲ 8 vs Q2
$526.45M
Total Inst. Value
▲ $308.21M vs Q2
69.31M
Shares Outstanding
freeFloat 76.43%
59.62M
13F Shares Held
▲ 7.04M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
VSTM largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
RTW INVESTMENTS, LP pharmaceutical preparations | 5.43M | 8.20% | 8.20% | $47.91B | Nov 14, 2025 | ▲ 1.17M |
BALYASNY ASSET MANAGEMENT L.P. pharmaceutical preparations | 4.15M | 6.27% | 6.27% | $36.62B | Nov 14, 2025 | ▼ 59.2K |
LOGOS GLOBAL MANAGEMENT LP pharmaceutical preparations | 4.05M | 6.12% | 6.12% | $35.76B | Nov 14, 2025 | ▲ 3.05M |
POINT72 ASSET MANAGEMENT, L.P. pharmaceutical preparations | 3.88M | 5.87% | 5.87% | $34.25B | Nov 14, 2025 | NEW |
BLACKROCK, INC. pharmaceutical preparations | 3.72M | 5.62% | 5.62% | $32.82B | Nov 12, 2025 | ▲ 958.3K |
VANGUARD GROUP INC pharmaceutical preparations | 3.48M | 5.26% | 5.26% | $30.72B | Nov 7, 2025 | ▲ 55.4K |
STONEPINE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 2.67M | 4.04% | 4.04% | $23.58B | Nov 13, 2025 | ▲ 1.31M |
VIVO CAPITAL, LLC pharmaceutical preparations | 2.64M | 4.00% | 4.00% | $23.36B | Nov 14, 2025 | ▲ 1.11M |
FORESITE CAPITAL MANAGEMENT VI LLC pharmaceutical preparations | 2.62M | 3.95% | 3.95% | $23.09B | Nov 14, 2025 | ▲ 1.34M |
STATE STREET CORP pharmaceutical preparations | 2.23M | 3.37% | 3.37% | $19.68B | Nov 14, 2025 | ▼ 22.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
26
Increased
+14.65M shares7
New Positions
first time holders15
Decreased
−6.02M shares0
Sold Out
fully exitedNet shares change (top 50)
+8.64M
+14.65M / −6.02M
Net new holders
+18
7 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
VSTM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
0
Buy transactions
1
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
BAILEY MICHAEL P director | May 21, 2026 | Award | 108,000 | — | — | 108.0K | Form 4 ↗ |
Tollefson Karin Anna director | May 21, 2026 | Award | 36,000 | — | — | 52.7K | Form 4 ↗ |
Stuglik Brian M director | May 21, 2026 | Award | 36,000 | — | — | 137.1K | Form 4 ↗ |
Rowinsky Eric K director | May 21, 2026 | Award | 36,000 | — | — | 52.7K | Form 4 ↗ |
ROBERTSON MICHELLE director | May 21, 2026 | Award | 36,000 | — | — | 52.7K | Form 4 ↗ |
Kapur Anil director | May 21, 2026 | Award | 36,000 | — | — | 52.7K | Form 4 ↗ |
Bunn Paul A. director | May 21, 2026 | Award | 36,000 | — | — | 44.3K | Form 4 ↗ |
JOHNSON JOHN director | May 21, 2026 | Award | 36,000 | — | — | 52.7K | Form 4 ↗ |
Paterson Dan President and CEO | May 4, 2026 | Sale | 806 | $5.82 | $4.7K | 612.1K | Form 4 ↗ |
Calkins Daniel Chief Financial Officer | Mar 20, 2026 | Award | 57 | $5.74 | $327.18 | 121.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Verastem, Inc. (VSTM) is primarily owned by institutional investors, who hold approximately 86.0% of total shares outstanding. Company insiders own approximately 23.57%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Verastem, Inc. is RTW INVESTMENTS, LP, holding approximately 5.43 million shares — equal to 8.20% of outstanding shares — as of September 30, 2025.
A total of 123 institutional investors currently hold VSTM stock, with a combined institutional value of approximately $526,453,168 as of the most recent 13F filing period.
Frequently asked questions
VSTM ownershipVerastem, Inc. (VSTM) is primarily owned by institutional investors, who hold approximately 86.0% of shares. The largest shareholder is RTW INVESTMENTS, LP with a 8.20% stake. Company insiders hold 23.57%. Data sourced from SEC Form 13F as of September 30, 2025.