Brown Advisory’s AtaiBeckley Inc ATAI Stock Holding History

Brown Advisory’s Portfolio ATAI Stock Details ATAI Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-10,460	Closed	-$55.3K	–	1389
2025 Q3	$55.3K	Buy	+10,460	New	+$42.5K	﹤0.01%	1369

Other funds holding ATAI

Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

DTC

Deep Track Capital Greenwich, Connecticut $6.12B AUM 144% 1-Year Est. Return

AIM

ARK Investment Management St. Petersburg, Florida $12.9B AUM 64.92% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

FCMV

Foresite Capital Management VI Larkspur, California $460M AUM 261.77% 1-Year Est. Return

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

RTW Investments New York $10B AUM 135.35% 1-Year Est. Return

Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return

ABG

Ally Bridge Group New York $124M AUM 249.88% 1-Year Est. Return

Brown Advisory's ATAI Position: Q4 2025 in Review

Brown Advisory sold out of AtaiBeckley Inc (ATAI) in Q4 2025, closing a stake of 10,460 shares — an estimated $55.3K sold.

Brown Advisory first reported a position in ATAI in Q3 2025 and held it in 1 quarter. The position peaked at $55.3K in Q3 2025. 138 funds tracked by Wall St. Rank hold ATAI as of Q4 2025.

Brown Advisory reported no remaining AtaiBeckley Inc position as of Q4 2025 after selling out during the quarter.
Brown Advisory sold 10,460 AtaiBeckley Inc shares in Q4 2025, an estimated $55.3K.
Brown Advisory first reported a position in AtaiBeckley Inc in Q3 2025 and held it in 1 quarter.
Brown Advisory's AtaiBeckley Inc position peaked at $55.3K in Q3 2025.
138 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q4 2025.

Based on Brown Advisory's 13F filing for Q4 2025, filed 13 Feb 2026.