Marshall Wace’s AtaiBeckley Inc ATAI Stock Holding History

Marshall Wace’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
2026 Q1	$8.37M	Sell	2,364,446 -310,671	-12%	-$1.17M	0.01%	1060
2025 Q4	$10.9M	Buy	2,675,117 +1,609,236	+151%	+$7.59M	0.01%	838
2025 Q3	$5.64M	Buy	1,065,881 +786,007	+281%	+$3.19M	0.01%	1143
2025 Q2	$613K	Buy	+279,874	New	+$502K	﹤0.01%	2068
2024 Q2	–	Sell	-793,839	Closed	-$1.56M	–	2528
2024 Q1	$1.56M	Buy	793,839 +17,950	+2%	+$33K	﹤0.01%	1467
2023 Q4	$1.09M	Buy	+775,889	New	+$965K	﹤0.01%	1443
2022 Q4	–	Sell	-43,933	Closed	-$147K	–	2917
2022 Q3	$147K	Buy	+43,933	New	+$180K	﹤0.01%	3138
2022 Q1	–	Sell	-406,618	Closed	-$3.1M	–	3328
2021 Q4	$3.1M	Buy	+406,618	New	+$4.93M	0.01%	1742

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

Marshall Wace's ATAI Position: Q1 2026 in Review

Marshall Wace reduced its AtaiBeckley Inc (ATAI) stake by 12% in Q1 2026, selling an estimated $1.17M and leaving 2,364,446 shares worth $8.37M. The position accounts for 0.01% of the portfolio, ranked #1060.

Marshall Wace first reported a position in ATAI in Q4 2021 and has held it in 8 quarters since. The position peaked at $10.9M in Q4 2025. 183 funds tracked by Wall St. Rank hold ATAI as of Q1 2026.

Marshall Wace held 2,364,446 shares of AtaiBeckley Inc worth $8.37M as of Q1 2026.
Marshall Wace sold 310,671 AtaiBeckley Inc shares in Q1 2026, an estimated $1.17M.
AtaiBeckley Inc made up 0.01% of Marshall Wace's portfolio in Q1 2026, its #1060 holding.
Marshall Wace first reported a position in AtaiBeckley Inc in Q4 2021 and has held it in 8 quarters since.
Marshall Wace's AtaiBeckley Inc position peaked at $10.9M in Q4 2025.
183 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q1 2026.

Based on Marshall Wace's 13F filing for Q1 2026, filed 15 May 2026.