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
2026
Q1 		$15.4M Buy
+4,364,096
New +$16.4M 0.01% 1761
2025
Q4 		– Sell
-1,097,768
Closed -$5.81M – 5997
2025
Q3 		$5.81M Sell
1,097,768
-90,397
-8% -$367K ﹤0.01% 2981
2025
Q2 		$2.6M Buy
1,188,165
+52,413
+5% +$94K ﹤0.01% 3645
2025
Q1 		$1.54M Buy
1,135,752
+154,195
+16% +$259K ﹤0.01% 4015
2024
Q4 		$1.31M Buy
981,557
+539,830
+122% +$717K ﹤0.01% 3985
2024
Q3 		$512K Sell
441,727
-206,459
-32% -$275K ﹤0.01% 4817
2024
Q2 		$862K Sell
648,186
-1,568,334
-71% -$2.83M ﹤0.01% 4203
2024
Q1 		$4.37M Buy
2,216,520
+1,455,764
+191% +$2.68M ﹤0.01% 2993
2023
Q4 		$1.07M Buy
760,756
+667,056
+712% +$829K ﹤0.01% 4098
2023
Q3 		$121K Sell
93,700
-1,014,445
-92% -$1.74M ﹤0.01% 5289
2023
Q2 		$1.91M Buy
1,108,145
+374,334
+51% +$689K ﹤0.01% 3521
2023
Q1 		$1.33M Sell
733,811
-506,737
-41% -$858K ﹤0.01% 3825
2022
Q4 		$3.3M Buy
1,240,548
+340,145
+38% +$1.03M ﹤0.01% 3134
2022
Q3 		$2.98M Buy
900,403
+697,624
+344% +$2.87M ﹤0.01% 3396
2022
Q2 		$738K Buy
202,779
+62,742
+45% +$256K ﹤0.01% 4649
2022
Q1 		$713K Sell
140,037
-373,235
-73% -$2.08M ﹤0.01% 4843
2021
Q4 		$3.92M Buy
513,272
+28,847
+6% +$350K ﹤0.01% 3144
2021
Q3 		$7.17M Sell
484,425
-35,061
-7% -$570K ﹤0.01% 2458
2021
Q2 		$9.61M Buy
+519,486
New +$9.6M 0.01% 1967

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.