Werewolf Therapeutics HOWL Institutional Ownership

Ownership Summary

Werewolf Therapeutics, Inc. (NASDAQ:HOWL) has 48 institutional investors with active 13F positions as of March 2026.

• Their combined ownership stood at 28.8% of outstanding shares in March 2026, down from 32.1% in December 2025.
• They increased total shares held in Werewolf Therapeutics by 7.41% from last quarter, and the number of investors in HOWL decreased 32.39% annually.
• Of these 48 holders, 18 added to their stakes in Werewolf Therapeutics, 13 trimmed positions, and 17 made no changes.
• Combined, these investors held 14.0Mn shares in HOWL for March 2026, up by 965.32K shares quarter on quarter, and down 13.88Mn shares year over year.
• As of March 31, 2026, the biggest holder of Werewolf Therapeutics is RA CAPITAL MANAGEMENT, L.P. at 6.68Mn shares, representing 13.75% of shares outstanding.
• The largest buyers of Werewolf Therapeutics for the quarter ending March 2026 were VANGUARD CAPITAL MANAGEMENT LLC (1.22Mn), Squadron Capital Management LLC (563.54K), VANGUARD FIDUCIARY TRUST CO (157.73K), GEODE CAPITAL MANAGEMENT, LLC (53.6K), XTX Topco Ltd (50.93K).
• The largest sellers of Werewolf Therapeutics for the quarter ending March 2026 were Bank Of America Corp /De/ (472.97K), MPM BioImpact LLC (184.75K), RENAISSANCE TECHNOLOGIES LLC (161.55K), Alyeska Investment Group, L.P. (149.15K), MILLENNIUM MANAGEMENT LLC (108.06K).
• Business Quant data shows the 10 biggest positions in Werewolf Therapeutics as of March 2026 are held by RA CAPITAL MANAGEMENT, L.P. (6.68Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.22Mn), MPM BioImpact LLC (1.21Mn), Lynx1 Capital Management LP (657.79K), SPHERA FUNDS MANAGEMENT LTD. (626.81K), DC Funds, LP (589.1K), Squadron Capital Management LLC (563.54K), RENAISSANCE TECHNOLOGIES LLC (516.22K), GEODE CAPITAL MANAGEMENT, LLC (389.49K), Bank Of America Corp /De/ (264.58K).