Ruane, Cunniff & Goldfarb’s AtaiBeckley Inc ATAI Stock Holding History

Ruane, Cunniff & Goldfarb’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	$149K	Buy	+42,112	New	+$159K	﹤0.01%	49
2025 Q4	–	Sell	-42,112	Closed	-$223K	–	49
2025 Q3	$223K	Hold	42,112	–	–	﹤0.01%	43
2025 Q2	$92.2K	Hold	42,112	–	–	﹤0.01%	43
2025 Q1	$57.3K	Hold	42,112	–	–	﹤0.01%	38
2024 Q4	$56K	Hold	42,112	–	–	﹤0.01%	39
2024 Q3	$48.9K	Hold	42,112	–	–	﹤0.01%	37
2024 Q2	$56K	Hold	42,112	–	–	﹤0.01%	37
2024 Q1	$83K	Hold	42,112	–	–	﹤0.01%	33
2023 Q4	$59.4K	Hold	42,112	–	–	﹤0.01%	33
2023 Q3	$54.3K	Hold	42,112	–	–	﹤0.01%	36
2023 Q2	$72.4K	Hold	42,112	–	–	﹤0.01%	34
2023 Q1	$76.2K	Buy	+42,112	New	+$71.3K	﹤0.01%	31

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

Ruane, Cunniff & Goldfarb's ATAI Position: Q1 2026 in Review

Ruane, Cunniff & Goldfarb opened a new position in AtaiBeckley Inc (ATAI) in Q1 2026: 42,112 shares worth $149K. The stake represents ﹤0.01% of the portfolio and ranks #49 among its holdings. This is a return to the name: Ruane, Cunniff & Goldfarb previously reported a position in ATAI as recently as Q3 2025.

Ruane, Cunniff & Goldfarb first reported a position in ATAI in Q1 2023 and has held it in 12 quarters since. The position peaked at $223K in Q3 2025. 183 funds tracked by Wall St. Rank hold ATAI as of Q1 2026.

Ruane, Cunniff & Goldfarb held 42,112 shares of AtaiBeckley Inc worth $149K as of Q1 2026.
AtaiBeckley Inc was a new Ruane, Cunniff & Goldfarb position in Q1 2026.
AtaiBeckley Inc made up ﹤0.01% of Ruane, Cunniff & Goldfarb's portfolio in Q1 2026, its #49 holding.
Ruane, Cunniff & Goldfarb first reported a position in AtaiBeckley Inc in Q1 2023 and has held it in 12 quarters since.
Ruane, Cunniff & Goldfarb's AtaiBeckley Inc position peaked at $223K in Q3 2025.
183 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q1 2026.

Based on Ruane, Cunniff & Goldfarb's 13F filing for Q1 2026, filed 15 May 2026.