PEAK6’s AtaiBeckley Inc ATAI Stock Holding History

PEAK6’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	-208,548	Closed	-$847K	–	2916
2025 Q2	$457K	Sell	208,548 -21,300	-9%	-$38.2K	﹤0.01%	2157
2025 Q1	$313K	Buy	229,848 +129,848	+130%	+$218K	﹤0.01%	2267
2024 Q4	$133K	Buy	+100,000	New	+$133K	﹤0.01%	2657

Other funds holding ATAI

DTC

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

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

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

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

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

Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

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

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

Candriam SCA Strassen, Luxembourg, Luxembourg $19.3B AUM 39.18% 1-Year Est. Return

Qube Research & Technologies (QRT) London, United Kingdom $89.9B AUM 20.22% 1-Year Est. Return

PEAK6's ATAI Position: Q3 2025 in Review

PEAK6 sold out of AtaiBeckley Inc (ATAI) in Q3 2025, closing a stake of 208,548 shares — an estimated $847K sold.

PEAK6 first reported a position in ATAI in Q4 2024 and held it in 3 quarters. The position peaked at $457K in Q2 2025. 129 funds tracked by Wall St. Rank hold ATAI as of Q3 2025.

PEAK6 reported no remaining AtaiBeckley Inc position as of Q3 2025 after selling out during the quarter.
PEAK6 sold 208,548 AtaiBeckley Inc shares in Q3 2025, an estimated $847K.
PEAK6 first reported a position in AtaiBeckley Inc in Q4 2024 and held it in 3 quarters.
PEAK6's AtaiBeckley Inc position peaked at $457K in Q2 2025.
129 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q3 2025.

Based on PEAK6's 13F filing for Q3 2025, filed 14 Nov 2025.