Millennium Management
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Millennium Management’s AtaiBeckley Inc ATAI Stock Holding History

Millennium Management’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
-100,000
Closed -$219K – 6010
2025
Q2 		$219K Buy
+100,000
New +$179K ﹤0.01% 5325

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
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
CS
Candriam SCA Strassen, Luxembourg, Luxembourg $19.3B AUM 39.18% 1-Year Est. Return
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $89.9B AUM 20.22% 1-Year Est. Return
FCMV
Foresite Capital Management VI Larkspur, California $460M AUM 261.77% 1-Year Est. Return

Millennium Management's ATAI Position: Q1 2026 in Review

Millennium Management opened a new position in AtaiBeckley Inc (ATAI) in Q1 2026: 4,364,096 shares worth $15.4M. The stake represents 0.01% of the portfolio and ranks #1761 among its holdings. This is a return to the name: Millennium Management previously reported a position in ATAI as recently as Q3 2025.

Millennium Management first reported a position in ATAI in Q2 2021 and has held it in 19 quarters since. 183 funds tracked by Wall St. Rank hold ATAI as of Q1 2026.

  • Millennium Management held 4,364,096 shares of AtaiBeckley Inc worth $15.4M as of Q1 2026.
  • AtaiBeckley Inc was a new Millennium Management position in Q1 2026.
  • AtaiBeckley Inc made up 0.01% of Millennium Management's portfolio in Q1 2026, its #1761 holding.
  • Millennium Management first reported a position in AtaiBeckley Inc in Q2 2021 and has held it in 19 quarters since.
  • 183 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.