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John Overdeck’s AtaiBeckley Inc ATAI Stock Holding History

John Overdeck’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
Q2 		$4.33M Sell
822,471
-1,153,081
-58% -$4.85M ﹤0.01% 2274
2026
Q1 		$6.99M Buy
1,975,552
+565,323
+40% +$2.13M 0.01% 1696
2025
Q4 		$5.77M Buy
1,410,229
+1,046,403
+288% +$4.94M 0.01% 1585
2025
Q3 		$1.92M Sell
363,826
-146,235
-29% -$594K ﹤0.01% 2156
2025
Q2 		$1.12M Buy
510,061
+138,096
+37% +$248K ﹤0.01% 2179
2025
Q1 		$506K Sell
371,965
-18,912
-5% -$31.8K ﹤0.01% 2517
2024
Q4 		$520K Sell
390,877
-16,306
-4% -$21.7K ﹤0.01% 2522
2024
Q3 		$472K Sell
407,183
-309,948
-43% -$413K ﹤0.01% 2503
2024
Q2 		$954K Buy
717,131
+316,146
+79% +$570K ﹤0.01% 2009
2024
Q1 		$790K Sell
400,985
-14,758
-4% -$27.2K ﹤0.01% 2097
2023
Q4 		$586K Buy
415,743
+130,314
+46% +$162K ﹤0.01% 2374
2023
Q3 		$368K Sell
285,429
-96,413
-25% -$165K ﹤0.01% 2410
2023
Q2 		$657K Sell
381,842
-470,872
-55% -$867K ﹤0.01% 2194
2023
Q1 		$1.54M Sell
852,714
-121,878
-13% -$206K ﹤0.01% 1587
2022
Q4 		$2.59M Buy
974,592
+221,961
+29% +$674K 0.01% 1176
2022
Q3 		$2.49M Buy
752,631
+20,487
+3% +$84.2K 0.01% 1049
2022
Q2 		$2.67M Buy
732,144
+221,870
+43% +$907K 0.01% 1033
2022
Q1 		$2.6M Buy
510,274
+96,000
+23% +$534K 0.01% 1220
2021
Q4 		$3.16M Buy
+414,274
New +$5.03M 0.01% 1534

Other funds holding ATAI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
CS
Candriam SCA Strassen, Luxembourg, Luxembourg $22.2B AUM 58.34% 1-Year Est. Return

John Overdeck's ATAI Position: Q2 2026 in Review

John Overdeck reduced its AtaiBeckley Inc (ATAI) stake by 58% in Q2 2026, selling an estimated $4.85M and leaving 822,471 shares worth $4.33M. The position accounts for ﹤0.01% of the portfolio, ranked #2274.

John Overdeck first reported a position in ATAI in Q4 2021 and has held it in 19 quarters since. The position peaked at $6.99M in Q1 2026. 241 funds tracked by Wall St. Rank hold ATAI as of Q2 2026.

  • John Overdeck held 822,471 shares of AtaiBeckley Inc worth $4.33M as of Q2 2026.
  • John Overdeck sold 1,153,081 AtaiBeckley Inc shares in Q2 2026, an estimated $4.85M.
  • AtaiBeckley Inc made up ﹤0.01% of John Overdeck's portfolio in Q2 2026, its #2274 holding.
  • John Overdeck first reported a position in AtaiBeckley Inc in Q4 2021 and has held it in 19 quarters since.
  • John Overdeck's AtaiBeckley Inc position peaked at $6.99M in Q1 2026.
  • 241 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.