Two Sigma Securities’s AtaiBeckley Inc ATAI Stock Holding History

Two Sigma Securities’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 Q3	–	Sell	-21,117	Closed	-$46.2K	–	1382
2025 Q2	$46.2K	Buy	+21,117	New	+$37.9K	0.01%	1120
2024 Q2	–	Sell	-55,540	Closed	-$109K	–	2959
2024 Q1	$109K	Buy	55,540 +21,487	+63%	+$39.5K	﹤0.01%	2465
2023 Q4	$48K	Buy	+34,053	New	+$42.3K	﹤0.01%	2611
2023 Q1	–	Sell	-22,741	Closed	-$60.5K	–	2637
2022 Q4	$60.5K	Buy	22,741 +12,070	+113%	+$36.7K	﹤0.01%	2132
2022 Q3	$35K	Buy	+10,671	New	+$43.8K	﹤0.01%	2228

Other funds holding ATAI

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

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

Citadel Advisors Miami, Florida $618B AUM 30.34% 1-Year Est. Return

ABG

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

AIM

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

T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

PFCS

Pale Fire Capital SE Prague, Czech Republic $1.14B AUM 42.87% 1-Year Est. Return

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

Two Sigma Securities's ATAI Position: Q3 2025 in Review

Two Sigma Securities sold out of AtaiBeckley Inc (ATAI) in Q3 2025, closing a stake of 21,117 shares — an estimated $46.2K sold.

Two Sigma Securities first reported a position in ATAI in Q3 2022 and held it in 5 quarters. The position peaked at $109K in Q1 2024. 129 funds tracked by Wall St. Rank hold ATAI as of Q3 2025.

Two Sigma Securities reported no remaining AtaiBeckley Inc position as of Q3 2025 after selling out during the quarter.
Two Sigma Securities sold 21,117 AtaiBeckley Inc shares in Q3 2025, an estimated $46.2K.
Two Sigma Securities first reported a position in AtaiBeckley Inc in Q3 2022 and held it in 5 quarters.
Two Sigma Securities's AtaiBeckley Inc position peaked at $109K in Q1 2024.
129 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q3 2025.

Based on Two Sigma Securities's 13F filing for Q3 2025, filed 14 Nov 2025.