Alumis Inc. (ALMS) Institutional Ownership

Ownership Summary

Alumis Inc. (NASDAQ:ALMS) showed up in the 13F filings of 131 institutional investors as of December 2025.

• Collectively, these holders controlled 75.9% of Alumis's outstanding shares in December 2025, up from 75.4% in September 2025.
• Their total shares held in ALMS increased 13.91% quarter over quarter, and separately, investors owning Alumis increased 101.54% from a year ago.
• Of these 131 funds, 76 grew their exposure to Alumis, 34 cut back, and 21 maintained positions.
• Altogether, these fund groups held 79.02Mn shares in ALMS by December 2025, up by 9.65Mn shares quarter on quarter, and up 38.68Mn shares year over year.
• BlackRock, Inc. leads ownership in ALMS with 7.17Mn shares as of December 31, 2025, equal to 6.89% of outstanding shares.
• The largest buyers of Alumis for the quarter ending December 2025 were Deep Track Capital, LP (6.77Mn), Janus Henderson Group Plc (4.22Mn), VANGUARD CAPITAL MANAGEMENT LLC (4.03Mn), PRICE T ROWE ASSOCIATES INC /MD/ (3.29Mn), UBS Group AG (2.94Mn).
• The largest sellers of Alumis for the quarter ending December 2025 were Trium Capital LLP (701.72K), ORBIMED ADVISORS LLC (554.57K), MILLENNIUM MANAGEMENT LLC (544.83K), Opaleye Management Inc. (520.0K), Omega Fund Management, LLC (411.97K).
• Business Quant data shows the 10 biggest positions in Alumis as of December 2025 are held by BlackRock, Inc. (7.17Mn), Deep Track Capital, LP (6.77Mn), Samsara BioCapital, LLC (6.35Mn), Foresite Capital Management V, LLC (5.9Mn), venBio Partners LLC (4.53Mn), Foresite Capital Management VI LLC (4.25Mn), Janus Henderson Group Plc (4.22Mn), VANGUARD CAPITAL MANAGEMENT LLC (4.03Mn), Cormorant Asset Management, LP (3.95Mn), Nextech Invest, Ltd. (3.54Mn).