The public view is the crawlable proof. The same sourced dataset is available through REST and MCP for agents, research scripts, and back-office tools.
This stock page is the Follow view. The Build view lets your agent query UMAC owners, fund changes, insider filings, and source links through REST or MCP.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/UMAC"
Use Arkolith to show who owns UMAC, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | TUDOR INVESTMENT CORP ET AL | $22.3M | 1.8M | ▲+80% Added · +798K sh | Q1 2026 | |
| 2 | DAVIDSON KEMPNER CAPITAL MANAGEMENT LP | $20.5M | 1.7M | ▲+726% Added · +1.5M sh | Q1 2026 | |
| 3 | CITADEL ADVISORS LLC | $17.2M | 1.4M | ▲Added Added · +1.4M sh | Q1 2026 | |
| 4 | Granahan Investment Management, LLC | $12.6M | 1.0M | ▼−12% Reduced · −138K sh | Q1 2026 | |
| 5 | STATE STREET CORP | $12.2M | 986K | ▲+2.0% Added · +19K sh | Q1 2026 | |
| 6 | NEEDHAM INVESTMENT MANAGEMENT LLC | $6.0M | 485K | ▲New +485K sh | Q1 2026 | |
| 7 | Hood River Capital Management LLC | $5.6M | 452K | ▼−46% Reduced · −383K sh | Q1 2026 | |
| 8 | Alyeska Investment Group, L.P. | $5.6M | 449K | ▲+127% Added · +251K sh | Q1 2026 | |
| 9 | Vident Advisory, LLC | $3.6M | 288K | ▲+262% Added · +209K sh | Q1 2026 | |
| 10 | MOORE CAPITAL MANAGEMENT, LP | $2.7M | 221K | ▲New +221K sh | Q1 2026 | |
| 11 | VANGUARD FIDUCIARY TRUST CO | $2.6M | 213K | ▲New +213K sh | Q1 2026 | |
| 12 | Point72 Asset Management, L.P. | $2.6M | 213K | ▲11× Added · +194K sh | Q1 2026 | |
| 13 | VOLORIDGE INVESTMENT MANAGEMENT, LLC | $2.6M | 209K | ▲New +209K sh | Q1 2026 | |
| 14 | GROUP ONE TRADING LLC | $1.2M | 100K | ▲+134% Added · +57K sh | Q1 2026 | |
| 15 | Engineers Gate Manager LP | $1.2M | 97K | ▲New +97K sh | Q1 2026 | |
| 16 | Hudson Bay Capital Management LP | $770K | 62K | ▲+27% Added · +13K sh | Q1 2026 | |
| 17 | 683 Capital Management, LLC | $682K | 55K | ▼−35% Reduced · −30K sh | Q1 2026 | |
| 18 | SCS Capital Management LLC | $675K | 54K | ▼−5.6% Reduced · −3K sh | Q1 2026 | |
| 19 | Empyrean Capital Partners, LP | $620K | 50K | ▲New +50K sh | Q1 2026 | |
| 20 | Compagnie Lombard Odier SCmA | $473K | 38K | ▲+86% Added · +18K sh | Q1 2026 | |
| 21 | Jain Global LLC | $431K | 35K | ▲New +35K sh | Q1 2026 | |
| 22 | Schonfeld Strategic Advisors LLC | $339K | 27K | ▲+84% Added · +13K sh | Q1 2026 | |
| 23 | OPPENHEIMER & CO INC | $313K | 25K | ▲New +25K sh | Q1 2026 | |
| 24 | Caption Management, LLC | $223K | 18K | ▲Added Added · +18K sh | Q1 2026 | |
| 25 | BLAIR WILLIAM & CO/IL | $216K | 17K | ▲+19% Added · +3K 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 |
|---|---|---|---|---|---|
| Jun 8, 2026 | Thompson Jeffrey M | Director | Sell (S) | 15K | $411K |
| Jun 5, 2026 | Thompson Jeffrey M | Director | Sell (S) | 15K | $404K |
| Mar 16, 2026 | Rich Sanford | Director | Sell (S) | 980 | $20K |
| Mar 16, 2026 | Camden Andrew Ross | President | Sell (S) | 10K | $179K |
| Mar 16, 2026 | Wright Stacy Rochelle | Chief Revenue Officer | Sell (S) | 14K | $255K |
| Mar 16, 2026 | Hoff Brian Joseph | Chief Financial Officer | Sell (S) | 11K | $212K |
| Mar 13, 2026 | Lowry Robert Paul | Director | Grant (A) | 2K | $0 |
| Mar 13, 2026 | Rich Sanford | Director | Grant (A) | 2K | $0 |
| Mar 13, 2026 | Thompson Jeffrey M | Director | Grant (A) | 2K | $0 |
| Jan 23, 2026 | Camden Andrew Ross | President | Grant (A) | 110K | $0 |
| Jan 23, 2026 | Evans Allan Thomas | Chief Executive Officer, Director | Grant (A) | 220K | $0 |
| Jan 23, 2026 | Hoff Brian Joseph | Chief Financial Officer | Grant (A) | 110K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| UNITEDHEALTH GROUP INCUNH | 41 funds | $1.5B |
| AMAZON.COM INCAMZN | 39 funds | $11.2B |
| ALPHABET INC-CL AGOOGL | 39 funds | $7.8B |
| MICROSOFT CORPMSFT | 38 funds | $10.6B |
| ELI LILLY & COLLY | 38 funds | $3.0B |
| NVIDIA CORPNVDA | 37 funds | $16.9B |
| META PLATFORMS INC-CLASS AMETA | 37 funds | $6.0B |
| BROADCOM INCAVGO | 37 funds | $5.8B |
| MASTERCARD INC - AMA | 37 funds | $2.1B |
| UBER TECHNOLOGIES INCUBER | 37 funds | $1.4B |
| UNION PACIFIC CORPUNP | 37 funds | $870.2M |
| TAIWAN SEMICONDUCTOR-SP ADRTSM | 36 funds | $3.6B |
Ranked by how many of UMAC'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 UMAC. 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.