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Brummer Multi-Strategy’s AtaiBeckley Inc ATAI Stock Holding History

Brummer Multi-Strategy’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 		– Sell
-275,409
Closed -$975K – 5
2026
Q1 		$975K Buy
275,409
+40,494
+17% +$152K 4.06% 7
2025
Q4 		$961K Buy
+234,915
New +$1.11M 5.81% 8

Other funds holding ATAI

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DTC
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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

Brummer Multi-Strategy's ATAI Position: Q2 2026 in Review

Brummer Multi-Strategy sold out of AtaiBeckley Inc (ATAI) in Q2 2026, closing a stake of 275,409 shares — an estimated $975K sold.

Brummer Multi-Strategy first reported a position in ATAI in Q4 2025 and held it in 2 quarters. The position peaked at $975K in Q1 2026. 243 funds tracked by Wall St. Rank hold ATAI as of Q2 2026.

  • Brummer Multi-Strategy reported no remaining AtaiBeckley Inc position as of Q2 2026 after selling out during the quarter.
  • Brummer Multi-Strategy sold 275,409 AtaiBeckley Inc shares in Q2 2026, an estimated $975K.
  • Brummer Multi-Strategy first reported a position in AtaiBeckley Inc in Q4 2025 and held it in 2 quarters.
  • Brummer Multi-Strategy's AtaiBeckley Inc position peaked at $975K in Q1 2026.
  • 243 funds tracked by Wall St. Rank held AtaiBeckley Inc as of Q2 2026.

Based on Brummer Multi-Strategy's 13F filing for Q2 2026, filed 23 Jul 2026.