ATAI LIFE SCIENCES NV (ATAI) Institutional Ownership Changes & 13F Activity

ATAI LIFE SCIENCES NV (ATAI). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include State Street Corp, Susquehanna International Group, Llp, Millennium Management Llc, Deep Track Capital, Lp, and Citadel Advisors Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Neuberger Berman Group LlcBuy+6,979+47.1%21,794$114.86KQ2 2026Oct 27, 2026
Op Asset Management LtdSell-423,674-100.0%0$0.00Q2 2026Sep 28, 2026
State Street CorpBuy+7,142,699+624.2%8,287,054$43.67MQ2 2026Sep 22, 2026
Manufacturers Life Insurance Company, TheBuy+81,700+127.5%145,800$768.37KQ2 2026Sep 09, 2026
Citadel Advisors LlcBuy+1,943,520+1134.0%2,114,908$11.15MQ2 2026Sep 02, 2026
Corient Private Wealth LlcBuy+8,039+75.9%18,624$98.15KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemBuy+264,382—264,382$1.39MQ2 2026Aug 24, 2026
Mercer Global Advisors IncBuy+1,029+5.2%20,712$109.15KQ2 2026Aug 19, 2026
Susquehanna International Group, LlpSell-4,798,840-90.8%487,486$2.57MQ2 2026Aug 14, 2026
Millennium Management LlcSell-2,593,570-59.4%1,770,526$9.33MQ2 2026Aug 14, 2026
Deep Track Capital, LpBuy+2,417,442+20.1%14,417,442$75.98MQ2 2026Aug 14, 2026
Price T Rowe Associates IncBuy+1,350,732—1,350,732$7.12MQ2 2026Aug 14, 2026
Two Sigma Investments, LpSell-1,153,081-58.4%822,471$4.33MQ2 2026Aug 14, 2026
Charles Schwab Investment Management IncBuy+784,100+66.4%1,965,683$10.36MQ2 2026Aug 14, 2026
Newtyn Management, LlcSell-593,895-33.3%1,187,808$6.26MQ2 2026Aug 14, 2026
Orbimed Advisors LlcBuy+450,500+129.8%797,500$4.20MQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+425,195+81.6%946,100$4.99MQ2 2026Aug 14, 2026
Squarepoint Ops LlcSell-407,021-86.7%62,672$330.28KQ2 2026Aug 14, 2026
Alliancebernstein L.P.Buy+334,300+1576.9%355,500$1.26MQ2 2026Aug 14, 2026
Bank Of America CorpSell-329,231-40.2%490,433$2.58MQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+291,383+4458.8%297,918$1.57MQ2 2026Aug 14, 2026
Invesco Ltd.Buy+248,757—248,757$1.31MQ2 2026Aug 14, 2026
Ameriprise Financial IncBuy+241,024—241,024$1.27MQ2 2026Aug 14, 2026
Metlife Investment Management, LlcBuy+188,676—188,676$994.32KQ2 2026Aug 14, 2026
Man Group PlcSell-184,703-34.0%358,812$1.89MQ2 2026Aug 14, 2026
Diametric Capital, LpBuy+148,702—148,702$783.66KQ2 2026Aug 14, 2026
Mirae Asset Global Etfs Holdings Ltd.Buy+146,911—146,911$774.22KQ2 2026Aug 14, 2026
Shay Capital LlcSell-144,720-88.2%19,422$102.35KQ2 2026Aug 14, 2026
Barclays PlcBuy+141,659+370.7%179,877$947.95KQ2 2026Aug 14, 2026
Verdad Advisers, LpSell-126,989-55.8%100,681$530.59KQ2 2026Aug 14, 2026
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Frequently asked questions about ATAI activity

  • Which institutional owners are buying ATAI?

    Institutional owners buying ATAI include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ATAI activity?

    "Buy" means an investor increased their reported position in ATAI compared to the prior reporting period. This reflects growing exposure to ATAI LIFE SCIENCES NV (ATAI) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ATAI increasing?

    Institutional interest in ATAI can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.