ATAIBECKLEY INC (ATAI)
Institutional ownership reported to the SEC as of Q2 2026, across 21 quarters.
Institutions report 147,238,862 shares against 370,864,669 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $134.8M | 25,574,573 | 0.00% | 2q | +274.2%+$98.8M |
| STATE STREET CORP | $87.3M | 16,574,108 | 0.00% | 2q | +1348.3%+$81.3M |
| Deep Track Capital, LP | $76.0M | 14,417,442 | 1.11% | 2q | +20.1%+$12.7M |
| VANGUARD CAPITAL MANAGEMENT LLC | $61.9M | 11,747,249 | 0.00% | 2q | HELD |
| GEODE CAPITAL MANAGEMENT, LLC | $36.5M | 6,933,309 | 0.00% | 2q | +176.2%+$23.3M |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | $29.7M | 5,642,758 | 0.04% | 2q | HELD |
| CITADEL ADVISORS LLC | $26.6M | 4,229,816 | 0.00% | 2q | +2368.0%+$25.5M |
| UBS Group AG | $23.3M | 4,424,701 | 0.00% | 2q | -40.4%-$15.8M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $21.6M | 4,106,450 | 0.00% | new | NEW |
| MORGAN STANLEY | $20.3M | 3,843,253 | 0.00% | 2q | HELD |
| Candriam S.C.A. | $16.0M | 3,039,399 | 0.07% | 2q | -1.5%-$247.3K |
| Foresite Capital Management VI LLC | $14.5M | 2,750,000 | 2.26% | 2q | HELD |
| NORTHERN TRUST CORP | $13.6M | 2,589,167 | 0.00% | 2q | +381.2%+$10.8M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $12.1M | 487,486 | 0.00% | 2q | -90.8%-$119.3M |
| RTW INVESTMENTS, LP | $10.5M | 2,000,000 | 0.09% | 2q | HELD |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $10.4M | 1,965,683 | 0.00% | 2q | +66.4%+$4.1M |
| Sixth Street Partners Management Company, L.P. | $10.4M | 1,965,683 | 0.00% | new | NEW |
| MILLENNIUM MANAGEMENT LLC | $9.3M | 1,770,526 | 0.00% | 2q | -59.4%-$13.7M |
| Eagle Health Investments LP | $9.0M | 1,709,359 | 1.49% | 2q | HELD |
| VANGUARD FIDUCIARY TRUST CO | $8.3M | 1,576,296 | 0.00% | 2q | +25.4%+$1.7M |
| Halter Ferguson Financial Inc. | $7.8M | 1,485,590 | 1.27% | new | NEW |
| FIRST TRUST ADVISORS LP | $7.2M | 1,375,500 | 0.00% | new | NEW |
| PRICE T ROWE ASSOCIATES INC /MD/ | $7.1M | 1,350,732 | 0.00% | new | NEW |
| Nuveen, LLC | $6.8M | 1,295,262 | 0.00% | 2q | +631.3%+$5.9M |
| Newtyn Management, LLC | $6.3M | 1,187,808 | 0.78% | 2q | -33.3%-$3.1M |
| GOLDMAN SACHS GROUP INC | $5.4M | 946,100 | 0.00% | 2q | +81.6%+$2.4M |
| MOORE CAPITAL MANAGEMENT, LP | $5.0M | 952,380 | 0.07% | 2q | HELD |
| ADAR1 Capital Management, LLC | $4.8M | 913,242 | 0.22% | 2q | HELD |
| Bank of New York Mellon Corp | $4.7M | 891,983 | 0.00% | 2q | +1855.7%+$4.5M |
| GROUP ONE TRADING LLC | $4.7M | options only | 0.01% | 2q | OPTIONS |
| AdvisorShares Investments LLC | $4.7M | 882,892 | 0.56% | 2q | +55.6%+$1.7M |
| TWO SIGMA INVESTMENTS, LP | $4.3M | 822,471 | 0.00% | 2q | -58.4%-$6.1M |
| ORBIMED ADVISORS LLC | $4.2M | 797,500 | 0.08% | 2q | +129.8%+$2.4M |
| Brown University | $3.8M | 718,500 | 3.39% | 21q | HELD |
| Woodline Partners LP | $3.2M | 600,000 | 0.01% | 2q | HELD |
| BOUSSARD & GAVAUDAN GESTION SAS | $2.9M | 540,893 | 0.14% | new | FIRST |
| JGP Global Gestao de Recursos Ltda. | $2.6M | 500,000 | 5.81% | new | NEW |
| BANK OF AMERICA CORP /DE/ | $2.6M | 490,433 | 0.00% | 2q | -40.2%-$1.7M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | $2.6M | 490,135 | 0.00% | 2q | +84.3%+$1.2M |
| Sumitomo Mitsui Trust Group, Inc. | $2.6M | 489,613 | 0.00% | 2q | -13.7%-$410.9K |
| Amova Asset Management Americas, Inc. | $2.5M | 483,952 | 0.03% | 3q | -14.7%-$439.9K |
| Swiss National Bank | $2.5M | 473,700 | 0.00% | 2q | +45.4%+$778.9K |
| SIMPLEX TRADING, LLC | $2.1M | options only | 0.00% | 2q | OPTIONS |
| RHUMBLINE ADVISERS | $2.1M | 399,436 | 0.00% | new | NEW |
| Man Group plc | $1.9M | 358,812 | 0.00% | 2q | -34.0%-$973.4K |
| DEUTSCHE BANK AG\ | $1.8M | 345,042 | 0.00% | 2q | +4892.6%+$1.8M |
| BIT Capital GmbH | $1.7M | 320,576 | 0.05% | 2q | +75.6%+$727.3K |
| VOYA INVESTMENT MANAGEMENT LLC | $1.6M | 304,576 | 0.00% | new | NEW |
| WELLS FARGO & COMPANY/MN | $1.6M | 297,918 | 0.00% | 2q | +2179.4%+$1.5M |
| JPMORGAN CHASE & CO | $1.5M | 273,350 | 0.00% | 2q | +42.0%+$455.8K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $1.5M | 291,600 | 0.00% | 2q | +354.9%+$1.2M |
| Jefferies Financial Group Inc. | $1.5M | 275,900 | 0.01% | 2q | HELD |
| Warm Springs Advisors Inc. | $1.4M | 263,000 | 0.96% | 2q | +92.8%+$667.2K |
| CenterBook Partners LP | $1.4M | 256,623 | 0.07% | 2q | -63.7%-$2.4M |
| IQ EQ FUND MANAGEMENT (IRELAND) Ltd | $1.3M | 252,913 | 0.08% | 2q | +34.5%+$341.9K |
| Invesco Ltd. | $1.3M | 248,757 | 0.00% | 2q | +367.6%+$1.0M |
| AMERIPRISE FINANCIAL INC | $1.3M | 241,024 | 0.00% | 2q | -63.7%-$2.2M |
| CITIGROUP INC | $1.3M | 239,550 | 0.00% | 2q | +388.4%+$1.0M |
| ALLIANCEBERNSTEIN L.P. | $1.3M | 355,500 | 0.00% | 2q | +1576.9%+$1.2M |
| Jump Financial, LLC | $1.2M | 218,675 | 0.01% | 2q | +375.1%+$909.9K |
| Catalio Capital Management, LP | $1.0M | 196,858 | 0.19% | 2q | HELD |
| Axxion S.A. | $1.0M | 193,223 | 0.07% | new | FIRST |
| Rockefeller Capital Management L.P. | $996.0K | 189,000 | 0.00% | 2q | +5.6%+$52.7K |
| MetLife Investment Management, LLC | $994.3K | 188,676 | 0.00% | new | NEW |
| Burkehill Global Management, LP | $975.0K | 185,000 | 0.04% | 2q | HELD |
| JANE STREET GROUP, LLC | $961.2K | options only | 0.00% | 2q | OPTIONS |
| BARCLAYS PLC | $948.0K | 179,877 | 0.00% | 2q | +370.7%+$746.5K |
| STABLEFORD CAPITAL II LLC | $887.2K | 168,350 | 0.31% | new | NEW |
| Legal & General Group Plc | $878.9K | 166,783 | 0.00% | 2q | +57.9%+$322.2K |
| VANGUARD ASSET MANAGEMENT, Ltd | $876.5K | 166,315 | 0.00% | 2q | +50.5%+$294.2K |
| Walleye Capital LLC | $806.4K | 60,818 | 0.00% | new | NEW |
| AXON CAPITAL LP | $805.8K | 152,904 | 1.09% | 2q | -50.0%-$805.8K |
| Diametric Capital, LP | $783.7K | 148,702 | 0.08% | new | NEW |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $774.2K | 146,911 | 0.00% | new | NEW |
| Carrera Capital Advisors | $724.9K | 137,560 | 0.11% | 2q | HELD |
| NewEdge Advisors, LLC | $638.3K | 121,116 | 0.00% | new | NEW |
| LPL Financial LLC | $620.2K | 117,676 | 0.00% | 2q | +412.4%+$499.1K |
| STATE OF WISCONSIN INVESTMENT BOARD | $586.0K | 111,188 | 0.00% | 2q | +7.5%+$40.7K |
| MARSHALL WACE, LLP | $579.8K | 110,019 | 0.00% | 3q | -95.3%-$11.9M |
| MYDA Advisors LLC | $579.7K | 110,000 | 0.09% | 2q | +120.0%+$316.2K |
| INSIGNEO ADVISORY SERVICES, LLC | $549.4K | 104,252 | 0.02% | new | NEW |
| Lighthouse Investment Partners, LLC | $545.0K | 103,420 | 0.01% | 2q | +695.5%+$476.5K |
| Eversept Partners, LP | $539.8K | 102,430 | 0.03% | new | NEW |
| Verdad Advisers, LP | $530.6K | 100,681 | 0.51% | 2q | -55.8%-$669.2K |
| Police & Firemen's Retirement System of New Jersey | $498.0K | 94,497 | 0.00% | new | NEW |
| NEW YORK STATE COMMON RETIREMENT FUND | $494.9K | 93,900 | 0.00% | new | NEW |
| Z3 Capital Partners, LLC | $487.6K | 92,525 | 0.10% | new | NEW |
| EntryPoint Capital, LLC | $455.8K | 86,497 | 0.11% | new | NEW |
| Virtus Investment Advisers, LLC | $439.9K | 83,469 | 0.10% | 2q | +31.3%+$104.9K |
| TUDOR INVESTMENT CORP ET AL | $431.7K | 81,911 | 0.00% | new | NEW |
| Jupiter Topco LLC | $418.0K | 79,400 | 0.00% | new | FIRST |
| State of New Jersey Common Pension Fund D | $402.3K | 76,338 | 0.00% | 2q | +35.1%+$104.6K |
| Vontobel Holding Ltd. | $399.9K | 75,878 | 0.00% | 2q | +279.4%+$294.5K |
| Vanguard Global Advisers, LLC | $397.6K | 75,442 | 0.00% | 2q | -14.7%-$68.4K |
| TRUIST FINANCIAL CORP | $395.7K | 75,080 | 0.00% | 2q | +358.0%+$309.3K |
| PROFUND ADVISORS LLC | $387.9K | 73,598 | 0.01% | new | NEW |
| China Universal Asset Management Co., Ltd. | $380.4K | 72,173 | 0.02% | 2q | -4.1%-$16.2K |
| WINTON GROUP Ltd | $372.1K | 70,600 | 0.01% | 2q | +9.6%+$32.7K |
| Zurcher Kantonalbank (Zurich Cantonalbank) | $355.5K | 67,455 | 0.00% | 2q | +45.5%+$111.1K |
| SEI INVESTMENTS CO | $348.1K | 66,060 | 0.00% | new | NEW |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-09-14 | 13D/A | Apeiron Investment Group Ltd.with 4 co-filers | 0.0% |
| 2026-07-27 | 13G | BlackRock, Inc. | 6.8% |
| 2026-07-17 | 13D/A | Christian Angermayer INDIVIDUALwith 4 co-filers | 15.4% |
Tender offers and delisting
Schedules TO, 13E-3 and 14D-9 and Form 25 filed in the last 180 days. Price a share is read from the filing itself where it states one plainly; a marker means we found no figure we could stand behind, and the reason is on it.
| Filed | What | Filed by | Price a share | Source |
|---|---|---|---|---|
| 2026-09-11 | Delisting notice from the exchange | Nasdaq Stock Market LLC | - | filing |
What the company announced
Form 8-K filings from the last 120 days, showing only the items worth a reader's attention. Earnings releases, exhibit attachments and general disclosures are filed constantly and are left out. Filed is when the SEC received it; event is the date the company says the thing happened.
| Filed | Event date | What | Source |
|---|---|---|---|
| 2026-09-11 | 2026-09-11 | Change of control Delisting notice Acquisition or disposal completed Directors or officers departed or appointed Charter or bylaws amended | filing |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-07-07 | HERSHBERG ROBERT | Director | Sold | 100,000 | $496.0K |
| 2026-06-26 | Kochendoerfer Gerd | Chief Operating Officer | Sold | 50,000 | $250.0K |
| 2026-04-20 | Craig Kevin James | Chief Medical Officer | Sold | 42,579 | $212.9K |
| 2026-06-25 | Craig Kevin James | Chief Medical Officer | Sold | 42,579 | $192.0K |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 246 | $797.9M | 147,238,862 | 83 | 83 | 24 | 2.8% |
| Q1 2026 | 187 | $366.9M | 100,790,796 | 163 | 6 | 4 | 2.8% |
| Q4 2025 | 140 | $240.3M | 55,892,076 | 60 | 27 | 21 | 4.9% |
| Q3 2025 | 130 | $256.1M | 44,438,384 | 47 | 33 | 13 | 8.2% |
| Q2 2025 | 94 | $66.9M | 29,440,421 | 21 | 19 | 18 | 3.6% |
| Q1 2025 | 82 | $31.4M | 21,895,949 | 10 | 16 | 20 | 5.3% |
| Q4 2024 | 87 | $20.4M | 14,528,749 | 18 | 16 | 12 | 5.3% |
| Q3 2024 | 75 | $13.7M | 11,662,624 | 7 | 12 | 21 | 1.6% |
| Q2 2024 | 89 | $16.5M | 12,099,988 | 16 | 14 | 16 | 2.3% |
| Q1 2024 | 89 | $37.3M | 17,825,301 | 13 | 16 | 20 | 5.7% |
| Q4 2023 | 87 | $24.1M | 16,838,944 | 16 | 17 | 20 | 1.5% |
| Q3 2023 | 97 | $19.4M | 14,648,978 | 6 | 19 | 25 | 1.8% |
| Q2 2023 | 98 | $27.5M | 15,283,121 | 10 | 23 | 22 | 4.5% |
| Q1 2023 | 107 | $32.1M | 17,274,766 | 14 | 31 | 28 | 2.7% |
| Q4 2022 | 117 | $70.9M | 25,060,409 | 33 | 37 | 17 | 5.9% |
| Q3 2022 | 98 | $90.1M | 26,658,868 | 16 | 30 | 15 | 2.0% |
| Q2 2022 | 94 | $81.8M | 21,691,597 | 27 | 33 | 13 | 2.7% |
| Q1 2022 | 83 | $91.8M | 16,026,417 | 22 | 23 | 23 | 11.2% |
| Q4 2021 | 83 | $130.3M | 14,613,238 | 42 | 21 | 8 | 14.5% |
| Q3 2021 | 57 | $182.9M | 11,585,530 | 25 | 8 | 12 | 7.1% |
| Q2 2021 | 43 | $212.2M | 11,635,398 | 43 | 0 | 0 | 0.0% |