AtaiBeckley Inc. (ATAI) Institutional Ownership

Ownership Summary

AtaiBeckley Inc. (NASDAQ:ATAI) has 118 institutional investors with active 13F positions as of December 2025.

• Collectively, these holders controlled 22.7% of AtaiBeckley's outstanding shares in December 2025, up from 20.6% in September 2025.
• Their total shares held in ATAI increased 80.39% quarter over quarter, and separately, investors owning AtaiBeckley increased 31.11% from a year ago.
• Among the 118 funds, 69 bought more AtaiBeckley shares, 21 sold down, and 28 held their ground.
• In total, institutional investors held 49.32Mn shares in AtaiBeckley as of December 2025, up by 21.98Mn shares quarter on quarter, and up 31.32Mn shares year over year.
• As of December 31, 2025, the biggest holder of AtaiBeckley is Brown University at 718.5K shares, representing 0.33% of shares outstanding.
• The most significant purchases of ATAI for the quarter ending December 2025 came from WEALTH ENHANCEMENT ADVISORY SERVICES, LLC (52.44K).
• Top sellers of ATAI stock for the quarter ending December 2025 included STABLEFORD CAPITAL II LLC (5.28K).
• According to Business Quant data, leading holders of ATAI for December 2025 are Brown University (718.5K), STABLEFORD CAPITAL II LLC (286.28K), KLP KAPITALFORVALTNING AS (69.8K), WEALTH ENHANCEMENT ADVISORY SERVICES, LLC (52.44K), RHL GROUP, LLC (72), Sankala Group LLC (52), Global Frontier Investments LLC (0).