AtaiBeckley Inc
ATAI
242 hedge funds and large institutions have $711M invested in AtaiBeckley Inc in 2026 Q2 according to their latest regulatory filings, with 84 funds opening new positions, 85 increasing their positions, 28 reducing their positions, and 21 closing their positions.
348% more call options, than puts
Call options by funds: $16.6M | Put options by funds: $3.72M
300% more first-time investments, than exits
New positions opened: 84 | Existing positions closed: 21
204% more repeat investments, than reductions
Existing positions increased: 85 | Existing positions reduced: 28
100% more capital invested
Capital invested by funds: $355M → $711M (+$356M)
50% more funds holding in top 10
Funds holding in top 10: 2 → 3 (+1)
32% more funds holding
Funds holding: 183 → 242 (+59)
9.15% more ownership
Funds ownership: 27.5% → 36.65% (+9.2%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$78.9M |
| 2 |
State Street
Boston,
Massachusetts
|
+$30.1M |
| 3 |
Geode Capital Management
Boston,
Massachusetts
|
+$18.6M |
| 4 |
Vanguard Portfolio Management
Malvern,
Pennsylvania
|
+$17.3M |
| 5 |
DTC
Deep Track Capital
Greenwich,
Connecticut
|
+$10.2M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$20.2M |
| 2 |
UBS Group
Zurich,
Switzerland
|
-$12.6M |
| 3 |
Millennium Management
New York
|
-$10.9M |
| 4 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$10.2M |
| 5 |
Marshall Wace
London,
United Kingdom
|
-$9.49M |
ATAI Hedge Fund Activity: Q2 2026 in Review
242 institutional investors reported a position in AtaiBeckley Inc (ATAI) for Q2 2026, worth a combined $711M — up 100% from $355M a quarter earlier.
Buyers outnumbered sellers: 84 funds opened new ATAI positions and 21 closed out — a net gain of 63 holders — while 85 added to existing stakes and 28 trimmed.
The largest buyer was BlackRock, adding an estimated $78.9M. The largest seller was Susquehanna International Group, cutting an estimated $20.2M.
- 242 institutional investors held AtaiBeckley Inc (ATAI) as of Q2 2026, up from 183 in Q1 2026.
- Funds reported $711M of AtaiBeckley Inc stock for Q2 2026, up 100% quarter-over-quarter.
- 84 funds opened new AtaiBeckley Inc positions in Q2 2026 and 21 closed out, a net change of +63 holders.
- The largest AtaiBeckley Inc buyer in Q2 2026 was BlackRock, an estimated $78.9M added.
- The largest AtaiBeckley Inc seller in Q2 2026 was Susquehanna International Group, an estimated $20.2M sold.
Based on aggregated 13F filings for Q2 2026.