Janus Henderson Group
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Janus Henderson Group’s AtaiBeckley Inc ATAI Stock Holding History

Janus Henderson Group’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 		$281K Buy
+79,400
New +$299K ﹤0.01% 2241
2023
Q4 		– Sell
-61,391
Closed -$78.9K – 2553
2023
Q3 		$78.9K Sell
61,391
-4
-0% -$7 ﹤0.01% 2536
2023
Q2 		$105K Sell
61,395
-113
-0.2% -$208 ﹤0.01% 2562
2023
Q1 		$110K Buy
61,508
+29,569
+93% +$50.1K ﹤0.01% 2611
2022
Q4 		$84.3K Hold
31,939
– – ﹤0.01% 2361
2022
Q3 		$106K Hold
31,939
– – ﹤0.01% 2038
2022
Q2 		$116K Buy
+31,939
New +$131K ﹤0.01% 2448

Other funds holding ATAI

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
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $1.28T AUM 58.89% 1-Year Est. Return
Millennium Management
Millennium Management New York $276B AUM 44.8% 1-Year Est. Return
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
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT) London, United Kingdom $108B AUM 37.29% 1-Year Est. Return

Janus Henderson Group's ATAI Position: Q1 2026 in Review

Janus Henderson Group opened a new position in AtaiBeckley Inc (ATAI) in Q1 2026: 79,400 shares worth $281K. The stake represents ﹤0.01% of the portfolio and ranks #2241 among its holdings. This is a return to the name: Janus Henderson Group previously reported a position in ATAI as recently as Q3 2023.

Janus Henderson Group first reported a position in ATAI in Q2 2022 and has held it in 7 quarters since. 184 funds tracked by Wall St. Rank hold ATAI as of Q1 2026.

  • Janus Henderson Group held 79,400 shares of AtaiBeckley Inc worth $281K as of Q1 2026.
  • AtaiBeckley Inc was a new Janus Henderson Group position in Q1 2026.
  • AtaiBeckley Inc made up ﹤0.01% of Janus Henderson Group's portfolio in Q1 2026, its #2241 holding.
  • Janus Henderson Group first reported a position in AtaiBeckley Inc in Q2 2022 and has held it in 7 quarters since.
  • 184 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.