# ATAIBECKLEY INC (ATAI)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/ATAI/

- Reporting holders: 246
- Reported value: $797.9M
- Shares held by institutions: 147,238,862 of 370,864,669 outstanding
- Held through calls: 2.2%
- Held through puts: 0.6%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $134.8M | 25,574,573 | 0.0% | 2 |
| [STATE STREET CORP](https://holderbook.com/funds/93751-state-street-corp/) | $87.3M | 16,574,108 | 0.0% | 2 |
| [Deep Track Capital, LP](https://holderbook.com/funds/1856083-deep-track-capital-lp/) | $76.0M | 14,417,442 | 1.1% | 2 |
| [VANGUARD CAPITAL MANAGEMENT LLC](https://holderbook.com/funds/2100119-vanguard-capital-management-llc/) | $61.9M | 11,747,249 | 0.0% | 2 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $36.5M | 6,933,309 | 0.0% | 2 |
| [ADAGE CAPITAL PARTNERS GP, L.L.C.](https://holderbook.com/funds/1165408-adage-capital-partners-gp-l-l-c/) | $29.7M | 5,642,758 | 0.0% | 2 |
| [CITADEL ADVISORS LLC](https://holderbook.com/funds/1423053-citadel-advisors-llc/) | $26.6M | 4,229,816 | 0.0% | 2 |
| [UBS Group AG](https://holderbook.com/funds/1610520-ubs-group-ag/) | $23.3M | 4,424,701 | 0.0% | 2 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](https://holderbook.com/funds/2100121-vanguard-portfolio-management-llc/) | $21.6M | 4,106,450 | 0.0% | 1 |
| [MORGAN STANLEY](https://holderbook.com/funds/895421-morgan-stanley/) | $20.3M | 3,843,253 | 0.0% | 2 |
| [Candriam S.C.A.](https://holderbook.com/funds/1537014-candriam-s-c-a/) | $16.0M | 3,039,399 | 0.1% | 2 |
| [Foresite Capital Management VI LLC](https://holderbook.com/funds/2013341-foresite-capital-management-vi-llc/) | $14.5M | 2,750,000 | 2.3% | 2 |
| [NORTHERN TRUST CORP](https://holderbook.com/funds/73124-northern-trust-corp/) | $13.6M | 2,589,167 | 0.0% | 2 |
| [SUSQUEHANNA INTERNATIONAL GROUP, LLP](https://holderbook.com/funds/1446194-susquehanna-international-group-llp/) | $12.1M | 487,486 | 0.0% | 2 |
| [RTW INVESTMENTS, LP](https://holderbook.com/funds/1493215-rtw-investments-lp/) | $10.5M | 2,000,000 | 0.1% | 2 |
| [CHARLES SCHWAB INVESTMENT MANAGEMENT INC](https://holderbook.com/funds/884546-charles-schwab-investment-management-inc/) | $10.4M | 1,965,683 | 0.0% | 2 |
| [Sixth Street Partners Management Company, L.P.](https://holderbook.com/funds/1812095-sixth-street-partners-management-company-l-p/) | $10.4M | 1,965,683 | 0.0% | 1 |
| [MILLENNIUM MANAGEMENT LLC](https://holderbook.com/funds/1273087-millennium-management-llc/) | $9.3M | 1,770,526 | 0.0% | 2 |
| [Eagle Health Investments LP](https://holderbook.com/funds/1842545-eagle-health-investments-lp/) | $9.0M | 1,709,359 | 1.5% | 2 |
| [VANGUARD FIDUCIARY TRUST CO](https://holderbook.com/funds/933478-vanguard-fiduciary-trust-co/) | $8.3M | 1,576,296 | 0.0% | 2 |
| [Halter Ferguson Financial Inc.](https://holderbook.com/funds/1842665-halter-ferguson-financial-inc/) | $7.8M | 1,485,590 | 1.3% | 1 |
| [FIRST TRUST ADVISORS LP](https://holderbook.com/funds/1125816-first-trust-advisors-lp/) | $7.2M | 1,375,500 | 0.0% | 1 |
| [PRICE T ROWE ASSOCIATES INC /MD/](https://holderbook.com/funds/80255-price-t-rowe-associates-inc-md/) | $7.1M | 1,350,732 | 0.0% | 1 |
| [Nuveen, LLC](https://holderbook.com/funds/1871926-nuveen-llc/) | $6.8M | 1,295,262 | 0.0% | 2 |
| [Newtyn Management, LLC](https://holderbook.com/funds/1569241-newtyn-management-llc/) | $6.3M | 1,187,808 | 0.8% | 2 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 246 | $797.9M |
| Q1 2026 | 187 | $366.9M |
| Q4 2025 | 140 | $240.3M |
| Q3 2025 | 130 | $256.1M |
| Q2 2025 | 94 | $66.9M |
| Q1 2025 | 82 | $31.4M |
| Q4 2024 | 87 | $20.4M |
| Q3 2024 | 75 | $13.7M |
| Q2 2024 | 89 | $16.5M |
| Q1 2024 | 89 | $37.3M |
| Q4 2023 | 87 | $24.1M |
| Q3 2023 | 97 | $19.4M |