197 tracked 13F filers disclose a position in ATAI as of the latest SEC 13F filings, a combined $450.5M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Deep Track Capital, LP | $42.5M | 12.0M | ▲New +12.0M sh | Q1 2026 | |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | $41.6M | 11.8M | →First observed position No prior filed position | Q1 2026 | |
| 3 | STATE STREET CORP | $43.7M | 8.3M | ▲+624% Added · +7.1M sh | Q2 2026 | |
| 4 | UBS Group AG | $26.3M | 7.4M | ▲New +7.4M sh | Q1 2026 | |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | $36.5M | 6.9M | ▲+176% Added · +4.4M sh | Q2 2026 | |
| 6 | BlackRock, Inc. | $24.2M | 6.8M | ▲New +6.8M sh | Q1 2026 | |
| 7 | ADAGE CAPITAL PARTNERS GP, L.L.C. | $20.0M | 5.6M | ▲New +5.6M sh | Q1 2026 | |
| 8 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $18.7M | 5.3M | ▲New +5.3M sh | Q1 2026 | |
| 9 | MILLENNIUM MANAGEMENT LLC | $15.4M | 4.4M | ▲New +4.4M sh | Q1 2026 | |
| 10 | MORGAN STANLEY | $13.6M | 3.9M | ▲New +3.9M sh | Q1 2026 | |
| 11 | Candriam S.C.A. | $16.0M | 3.0M | ▼−1.5% Reduced · −47K sh | Q2 2026 | |
| 12 | Qube Research & Technologies Ltd | $10.2M | 2.9M | ▲New +2.9M sh | Q1 2026 | |
| 13 | Foresite Capital Management VI LLC | $9.7M | 2.8M | ▲New +2.8M sh | Q1 2026 | |
| 14 | MARSHALL WACE, LLP | $8.4M | 2.4M | ▼−12% Reduced · −311K sh | Q1 2026 | |
| 15 | RTW INVESTMENTS, LP | $10.5M | 2.0M | —Held | Q2 2026 | |
| 16 | TWO SIGMA INVESTMENTS, LP | $7.0M | 2.0M | ▲New +2.0M sh | Q1 2026 | |
| 17 | Newtyn Management, LLC | $6.3M | 1.8M | ▲New +1.8M sh | Q1 2026 | |
| 18 | Eagle Health Investments LP | $9.0M | 1.7M | —Held | Q2 2026 | |
| 19 | Halter Ferguson Financial Inc. | $7.8M | 1.5M | ▲New +1.5M sh | Q2 2026 | |
| 20 | VANGUARD FIDUCIARY TRUST CO | $4.4M | 1.3M | →First observed position No prior filed position | Q1 2026 | |
| 21 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $4.2M | 1.2M | ▲New +1.2M sh | Q1 2026 | |
| 22 | MOORE CAPITAL MANAGEMENT, LP | $5.0M | 952K | —Held | Q2 2026 | |
| 23 | ADAR1 Capital Management, LLC | $3.2M | 913K | ▲New +913K sh | Q1 2026 | |
| 24 | AdvisorShares Investments LLC | $4.7M | 883K | ▲+56% Added · +315K sh | Q2 2026 | |
| 25 | BANK OF AMERICA CORP /DE/ | $2.9M | 820K | ▲New +820K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 41 funds opened a new position in ATAI and 9 added to an existing one, while 5 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 108 funds | $186.1B |
| MICROSOFT CORPMSFT | 108 funds | $122.5B |
| AMAZON.COM INCAMZN | 107 funds | $95.5B |
| ALPHABET INC-CL AGOOGL | 105 funds | $68.3B |
| META PLATFORMS INC-CLASS AMETA | 103 funds | $52.2B |
| BROADCOM INCAVGO | 102 funds | $72.5B |
| ELI LILLY & COLLY | 100 funds | $38.4B |
| MICRON TECHNOLOGY INCMU | 100 funds | $24.2B |
| APPLE INCAAPL | 99 funds | $136.6B |
| JPMORGAN CHASE & COJPM | 97 funds | $28.0B |
| VISA INC-CLASS A SHARESV | 95 funds | $25.2B |
| ADVANCED MICRO DEVICESAMD | 95 funds | $20.1B |
Ranked by how many of ATAI's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 7, 2026 | HERSHBERG ROBERT | Director | Sell (S) | 100K | $496K |
| Jun 26, 2026 | Kochendoerfer Gerd | Chief Operating Officer | Sell (S) | 50K | $250K |
| Jun 25, 2026 | Craig Kevin James | Chief Medical Officer | Sell (S) | 43K | $192K |
| Apr 20, 2026 | Craig Kevin James | Chief Medical Officer | Sell (S) | 43K | $213K |
| Mar 20, 2026 | Craig Kevin James | Chief Medical Officer | Sell (S) | 100K | $355K |
| Jan 2, 2026 | Feilding-Mellen Cosmo | Director | Sell (S) | 40K | $154K |
| Aug 14, 2025 | Apeiron Investment Group Ltd. | 10% Owner | Buy (P) | 8.7M | $19.0M |
| Mar 24, 2025 | Apeiron Investment Group Ltd. | 10% Owner | Buy (P) | 1.8M | $2.5M |
| Mar 21, 2025 | Short Glenn Frank | Chief Scientific Officer | Sell (S) | 13K | $18K |
| Mar 21, 2025 | Johnson Anne Nagengast | Chief Financial Officer | Sell (S) | 34K | $45K |
| Mar 21, 2025 | Rao Srinivas | See Remarks | Sell (S) | 75K | $102K |
| Mar 21, 2025 | Craig Kevin James | Chief Medical Officer | Sell (S) | 12K | $16K |
Connected entities for ATAI
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/ATAI/capital-change-brief"
Use Arkolith's capital_change_brief for ATAI. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for ATAI. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.