Alto Neuroscience, Inc. (ANRO) Institutional Ownership

Ownership Summary

A total of 76 institutions have reported a stake in Alto Neuroscience, Inc. (NYSE:ANRO) as of September 2025, according to recent 13F filings with the SEC.

• These investors collectively held 62.6% of the company's total shares outstanding in September 2025, down from 63.9% in June 2025.
• The company experienced a -3.51% quarterly change in institutional shares held, alongside a decrease of 2.56% in total owners annually.
• During the quarter, 27 institutions bought more Alto Neuroscience shares, 26 sold shares, and 23 of the 76 total investors held their position steady.
• The total number of shares held by institutions in Alto Neuroscience decreased to 16.94Mn as of September 2025, a net change of down by 615.25K shares quarter on quarter, and down 6.27Mn shares year over year.
• Alpha Wave Global, LP's holding of 3.71Mn shares as of September 30, 2025 makes it the primary institutional investor in Alto Neuroscience, owning 13.69% of the stock.
• Among the most significant buyers of Alto Neuroscience during September 2025 were Almitas Capital LLC (195.15K), PERCEPTIVE ADVISORS LLC (155.37K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (94.61K), TWO SIGMA INVESTMENTS, LP (71.84K), TWO SIGMA ADVISERS, LP (67.70K).
• Leading sellers of Alto Neuroscience stock in September 2025 included CITADEL ADVISORS LLC (463.44K), UBS Group AG (289.19K), BlackRock, Inc. (193.97K), MARSHALL WACE, LLP (112.18K), GOLDMAN SACHS GROUP INC (75.84K).
• The top 10 institutional holders of Alto Neuroscience for the quarter ending September 2025 included Alpha Wave Global, LP (3.71Mn), ARMISTICE CAPITAL, LLC (1.64Mn), Point72 Asset Management, L.P. (1.33Mn), FRANKLIN RESOURCES INC (1.16Mn), VANGUARD GROUP INC (1.11Mn), Vestal Point Capital, LP (950.00K), MARSHALL WACE, LLP (825.23K), 72 Investment Holdings, LLC (667.78K), ALKEON CAPITAL MANAGEMENT LLC (477.10K), NORTHERN TRUST CORP (461.29K).