Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ATAI held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Deep Track Capital, LP | 12.0M | $42.5M | +156.6% | 3.259% | 0.88% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 11.8M | $41.6M | β | 3.195% | 0.00% |
| 3 | UBS Group AG | 7.4M | $26.3M | β | 2.017% | 0.00% |
| 4 | BlackRock, Inc. | 6.8M | $24.2M | +143.0% | 1.857% | 0.00% |
| 5 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 6.0M | $21.2M | +887.6% | 1.630% | 0.00% |
| 6 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 5.6M | $20.0M | -20.3% | 1.533% | 0.03% |
| 7 | MILLENNIUM MANAGEMENT LLC | 4.4M | $15.4M | β | 1.185% | 0.01% |
| 8 | MORGAN STANLEY | 3.9M | $13.6M | -20.1% | 1.046% | 0.00% |
| 9 | Candriam Luxembourg S.C.A. | 3.1M | $10.9M | β | 0.838% | 0.06% |
| 10 | Qube Research & Technologies Ltd | 2.9M | $10.2M | +125.7% | 0.785% | 0.01% |
| 11 | Foresite Capital Management VI LLC | 2.8M | $9.7M | 0.0% | 0.747% | 2.12% |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 2.5M | $8.9M | β | 0.682% | 0.00% |
| 13 | MARSHALL WACE, LLP | 2.4M | $8.4M | -11.6% | 0.642% | 0.01% |
| 14 | RTW INVESTMENTS, LP | 2.0M | $7.1M | 0.0% | 0.543% | 0.07% |
| 15 | TWO SIGMA INVESTMENTS, LP | 2.0M | $7.0M | +40.1% | 0.537% | 0.01% |
| 16 | Newtyn Management, LLC | 1.8M | $6.3M | β | 0.484% | 0.67% |
| 17 | Eagle Health Investments LP | 1.7M | $6.1M | +1.8% | 0.464% | 1.26% |
| 18 | Arete Wealth Advisors, LLC | 16K | $4.7M | β | 0.005% | 0.35% |
| 19 | VANGUARD FIDUCIARY TRUST CO | 1.3M | $4.4M | β | 0.341% | 0.00% |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2M | $4.2M | β | 0.321% | 0.00% |
| 21 | STATE STREET CORP | 1.1M | $4.1M | +296.9% | 0.311% | 0.00% |
| 22 | MOORE CAPITAL MANAGEMENT, LP | 952K | $3.4M | β | 0.259% | 0.08% |
| 23 | ADAR1 Capital Management, LLC | 913K | $3.2M | 0.0% | 0.248% | 0.20% |
| 24 | BANK OF AMERICA CORP /DE/ | 820K | $2.9M | +999.7% | 0.223% | 0.00% |
| 25 | Brown University | 719K | $2.5M | 0.0% | 0.195% | 2.50% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in ATAI β a direct measure of their conviction.
Filings activity in ATAI during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ATAI position in Q1 2026
Institutions that fully closed their ATAI position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 181 | +33% | 25.03% | +9.70 pp | $361M | +63% |
| Q4 2025 | 136 | +5.4% | 15.33% | 0.38 pp | $221M | 2.4% |
| Q3 2025 | 129 | +36% | 15.71% | +11.31 pp | $227M | +257% |
| Q2 2025 | 95 | +22% | 4.40% | +2.39 pp | $64M | +119% |
| Q1 2025 | 78 | 12% | 2.01% | +0.74 pp | $29M | +58% |
| Q4 2024 | 89 | +19% | 1.27% | +0.37 pp | $18M | +41% |
| Q3 2024 | 75 | 14% | 0.90% | 0.21 pp | $13M | 19% |
| Q2 2024 | 87 | β | 1.11% | β | $16M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ATAI stock.
Based on Q1 2026 13F filings, institutional ownership of Atai Beckley N.V stands at 25.0%, held across 181 reporting institutions.
Deep Track Capital, LP is the largest reported institutional holder of ATAI, with approximately 12,000,000 shares worth $0.04B as of Q1 2026.
Yes β 3 widely-followed marquee investors appear among the top 25 institutional holders of ATAI, including SUSQUEHANNA INTERNATIONAL GROUP, LLP, MILLENNIUM MANAGEMENT LLC, TWO SIGMA INVESTMENTS, LP.
Our composite Smart Money Score for ATAI is 81 out of 100 (Strong Smart Money). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
75 institutions opened new positions in ATAI during Q1 2026, while 30 fully exited. 26 added to existing positions and 79 trimmed.
ATAI institutional ownership rose by 9.70 percentage points quarter-over-quarter, with a net change of +45 holders.
The top 10 institutions account for 62.6% of all reported 13F value in ATAI, and the top 25 account for 85.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Atai Beckley N.V (ATAI) Institutional Ownership