Verastem, Inc. (VSTM) Institutional Ownership

Ownership Summary

According to SEC filings for the period ending December 2025, Verastem, Inc. (NASDAQ:VSTM) is held by 136 institutional firms.

• Institutional ownership in Verastem edged up to 141.7% in December 2025, compared to 110.9% in September 2025.
• On a quarter-over-quarter basis, institutional holdings shifted by 40.93%, with a year-over-year an increase of 49.45% in the count of filers.
• A review of institutional activity for Verastem shows 93 of 136 filers increasing their positions, while 28 reduced their stake, and 15 remained unchanged.
• This class of investors increased its holdings in Verastem to 76.25Mn shares for the 13F-cycle ending December 2025, up by 22.15Mn shares quarter on quarter, and up 41.60Mn shares year over year.
• As of December 31, 2025, RTW INVESTMENTS, LP held Verastem's largest shareholding position with over 6.58Mn shares, representing 12.22% of total outstanding shares.
• Among the most significant buyers of Verastem during December 2025 were Deep Track Capital, LP (5.74Mn), Polar Capital Holdings Plc (2.87Mn), CITADEL ADVISORS LLC (2.17Mn), SymBiosis Capital Partners, LLC (2.00Mn), FARALLON CAPITAL MANAGEMENT LLC (2.00Mn).
• Leading sellers of Verastem stock in December 2025 included Point72 Asset Management, L.P. (2.88Mn), Logos Global Management LP (2.35Mn), Vivo Capital, LLC (1.54Mn), BALYASNY ASSET MANAGEMENT L.P. (951.04K), Nantahala Capital Management, LLC (830.76K).
• The top 10 institutional holders of Verastem for the quarter ending December 2025 included RTW INVESTMENTS, LP (6.58Mn), Deep Track Capital, LP (5.74Mn), BlackRock, Inc. (4.75Mn), VANGUARD GROUP INC (4.15Mn), Polar Capital Holdings Plc (3.93Mn), ARMISTICE CAPITAL, LLC (3.54Mn), STATE STREET CORP (3.22Mn), BALYASNY ASSET MANAGEMENT L.P. (3.20Mn), Foresite Capital Management VI LLC (3.14Mn), Stonepine Capital Management, LLC (2.73Mn).