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.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $24.2M | 6.8M | ▲New +6.8M sh | Q1 2026 | |
| 2 | Candriam S.C.A. | $10.9M | 3.1M | ▲New +3.1M sh | Q1 2026 | |
| 3 | GEODE CAPITAL MANAGEMENT, LLC | $8.9M | 2.5M | ▲New +2.5M sh | Q1 2026 | |
| 4 | RTW INVESTMENTS, LP | $7.1M | 2.0M | ▲New +2.0M sh | Q1 2026 | |
| 5 | VANGUARD FIDUCIARY TRUST CO | $4.4M | 1.3M | ▲New +1.3M sh | Q1 2026 | |
| 6 | STATE STREET CORP | $4.1M | 1.1M | ▲New +1.1M sh | Q1 2026 | |
| 7 | MOORE CAPITAL MANAGEMENT, LP | $3.4M | 952K | ▲New +952K sh | Q1 2026 | |
| 8 | CenterBook Partners LP | $2.5M | 707K | ▲New +707K sh | Q1 2026 | |
| 9 | Point72 Asset Management, L.P. | $2.4M | 665K | ▲New +665K sh | Q1 2026 | |
| 10 | Woodline Partners LP | $2.1M | 600K | ▲New +600K sh | Q1 2026 | |
| 11 | Man Group plc | $1.9M | 544K | ▲New +544K sh | Q1 2026 | |
| 12 | OP Asset Management Ltd | $1.5M | 424K | ▲New +424K sh | Q1 2026 | |
| 13 | ORBIMED ADVISORS LLC | $1.2M | 347K | ▲New +347K sh | Q1 2026 | |
| 14 | Jefferies Financial Group Inc. | $977K | 276K | ▲New +276K sh | Q1 2026 | |
| 15 | Jain Global LLC | $864K | 244K | ▲New +244K sh | Q1 2026 | |
| 16 | Hudson Bay Capital Management LP | $667K | 188K | ▲New +188K sh | Q1 2026 | |
| 17 | CITADEL ADVISORS LLC | $607K | 171K | ▲New +171K sh | Q1 2026 | |
| 18 | Schonfeld Strategic Advisors LLC | $275K | 78K | ▲New +78K sh | Q1 2026 | |
| 19 | KLP KAPITALFORVALTNING AS | $247K | 70K | —Held | Q1 2026 | |
| 20 | WINTON GROUP Ltd | $228K | 64K | ▲New +64K sh | Q1 2026 | |
| 21 | State of New Jersey Common Pension Fund D | $200K | 56K | ▲New +56K sh | Q1 2026 | |
| 22 | Caprock Group, LLC | $184K | 52K | ▲New +52K sh | Q1 2026 | |
| 23 | Zurcher Kantonalbank (Zurich Cantonalbank) | $164K | 46K | ▲New +46K sh | Q1 2026 | |
| 24 | Ruane, Cunniff & Goldfarb L.P. | $149K | 42K | ▲New +42K sh | Q1 2026 | |
| 25 | Cresset Asset Management, LLC | $111K | 31K | ▲New +31K 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.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 7, 2026 | HERSHBERG ROBERT | Director | Option exercise (M) | 49K | $66K |
| Jul 7, 2026 | HERSHBERG ROBERT | Director | Option exercise (M) | 51K | $69K |
| Jul 7, 2026 | HERSHBERG ROBERT | Director | Sell (S) | 100K | $496K |
| Jul 7, 2026 | HERSHBERG ROBERT | Director | Option exercise (M) | 49K | $0 |
| Jul 7, 2026 | HERSHBERG ROBERT | Director | Option exercise (M) | 51K | $0 |
| Jun 26, 2026 | Kochendoerfer Gerd | Chief Operating Officer | Option exercise (M) | 50K | $80K |
| Jun 26, 2026 | Kochendoerfer Gerd | Chief Operating Officer | Sell (S) | 50K | $250K |
| Jun 26, 2026 | Kochendoerfer Gerd | Chief Operating Officer | Option exercise (M) | 50K | $0 |
| Jun 25, 2026 | Craig Kevin James | Chief Medical Officer | Option exercise (M) | 33K | $50K |
| Jun 25, 2026 | Craig Kevin James | Chief Medical Officer | Option exercise (M) | 10K | $11K |
| Jun 25, 2026 | Craig Kevin James | Chief Medical Officer | Sell (S) | 43K | $192K |
| Jun 25, 2026 | Craig Kevin James | Chief Medical Officer | Option exercise (M) | 33K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 25 funds | $11.9B |
| AMAZON.COM INCAMZN | 25 funds | $10.2B |
| ALPHABET INC-CL AGOOGL | 25 funds | $8.5B |
| META PLATFORMS INC-CLASS AMETA | 25 funds | $6.3B |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 25 funds | $3.6B |
| MICRON TECHNOLOGY INCMU | 25 funds | $3.3B |
| ELI LILLY & COLLY | 25 funds | $3.3B |
| VISA INC-CLASS A SHARESV | 25 funds | $3.0B |
| HOME DEPOT INCHD | 25 funds | $2.1B |
| APPLIED MATERIALS INCAMAT | 25 funds | $2.0B |
| BANK OF AMERICA CORPBAC | 25 funds | $1.6B |
| LAM RESEARCH CORPLRCX | 25 funds | $1.6B |
Ranked by how many of ATAI's institutional holders also hold each name, a cross-fund conviction signal. Via the MCP server (ticker.co_held).
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. Every panel above is one call to the Arkolith API & MCP server.