Alumis Inc. (ALMS) Institutional Ownership

Ownership Summary

Recent 13F filings as of September 2025 show that 129 institutional investors hold a position in Alumis Inc. (NASDAQ:ALMS).

• These investors collectively held 76.1% of the company's total shares outstanding in September 2025, down from 147.5% in June 2025.
• Quarterly data indicates a 1.12% shift in institutional share volume, and the annual owner count reflects an increase of 148.08%.
• The latest 13F cycle for Alumis reveals that of 129 total investors, 69 funds grew their exposure, whereas 32 reduced theirs and 28 made no changes.
• This class of investors increased its holdings in Alumis to 79.18Mn shares for the 13F-cycle ending September 2025, up by 875.66K shares quarter on quarter, and up 43.96Mn shares year over year.
• As of September 30, 2025, AyurMaya Capital Management Company, LP held Alumis's largest shareholding position with over 15.14Mn shares, representing 14.55% of total outstanding shares.
• Among the most significant buyers of Alumis during September 2025 were Woodline Partners LP (1.56Mn), VANGUARD GROUP INC (625.40K), Trium Capital LLP (474.07K), HAP TRADING, LLC (340.00K), CITADEL ADVISORS LLC (310.10K).
• Leading sellers of Alumis stock in September 2025 included Madison Avenue Partners, LP (1.42Mn), TANG CAPITAL MANAGEMENT LLC (829.79K), Velan Capital Investment Management LP (674.16K), JANE STREET GROUP, LLC (547.84K), UBS Group AG (444.88K).
• The top 10 institutional holders of Alumis for the quarter ending September 2025 included AyurMaya Capital Management Company, LP (15.14Mn), Foresite Capital Management V, LLC (5.78Mn), Samsara BioCapital, LLC (4.80Mn), venBio Partners LLC (4.62Mn), Foresite Capital Management VI LLC (4.25Mn), BlackRock, Inc. (4.19Mn), VANGUARD GROUP INC (4.03Mn), Trium Capital LLP (3.12Mn), Nextech Invest, Ltd. (2.92Mn), Cormorant Asset Management, LP (2.15Mn).