Verastem VSTM Institutional Ownership

Updated Oct 11, 2026

Verastem, Inc. (NASDAQ:VSTM) had 156 institutional holders reporting a position on Form 13F for the quarter ended June 30, 2026.

• Their combined stake equaled 95.01% of outstanding shares in Q2 2026, up from 82.80% in Q1 2026.
• Total holdings of VSTM shares rose 16.87% from Q1 2026, and the holder count rose 45.79% from Q2 2025.
• Of these 156 holders, 100 added to their positions, 37 reduced their stakes and 19 left their positions unchanged.
• Institutional investors held 95.12Mn shares of Verastem in total at the end of Q2 2026, up 13.73Mn from the prior quarter and up 43.66Mn from a year earlier.
• As of June 30, 2026, the biggest holder of Verastem was BlackRock, Inc. with 9.19Mn shares, or 9.18% of shares outstanding.
• The biggest increases in VSTM positions during Q2 2026 came from BlackRock, Inc. (+3Mn shares), Vanguard Portfolio Management LLC (+2.51Mn shares), Armistice Capital, LLC (+2.43Mn shares), Baker Bros. Advisors LP (+1.91Mn shares) and Rosalind Advisors, Inc. (+1.85Mn shares).
• The biggest cuts to VSTM positions during Q2 2026 came from Citadel Advisors LLC (-1.99Mn shares), Morgan Stanley (-1.53Mn shares), J. Goldman & Co LP (-1.03Mn shares), Two Sigma Investments, LP (-617.06K shares) and Millennium Management LLC (-333.96K shares).
• Verastem's 10 largest institutional shareholders as of Q2 2026 were BlackRock, Inc. (9.19Mn shares), Armistice Capital, LLC (7.02Mn shares), RTW Investments, LP (6.64Mn shares), Deep Track Capital, LP (5.74Mn shares), State Street Corp (5.13Mn shares), Rosalind Advisors, Inc. (3.99Mn shares), Vanguard Capital Management LLC (3.85Mn shares), Nantahala Capital Management, LLC (3.58Mn shares), Stonepine Capital Management, LLC (3.35Mn shares) and Vanguard Portfolio Management LLC (3.27Mn shares), per Business Quant data.