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 MARA 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/MARA"
Use Arkolith to show who owns MARA, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $487.8M | 59.8M | ▲+2.1% Added · +1.2M sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $419.4M | 46.7M | ▲+3.1% Added · +1.4M sh | Q4 2025 | |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | $215.7M | 26.4M | ▲New +26.4M sh | Q1 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $133.4M | 16.4M | ▲New +16.4M sh | Q1 2026 | |
| 5 | STATE STREET CORP | $124.2M | 15.2M | ▲+3.1% Added · +455K sh | Q1 2026 | |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | $84.2M | 10.3M | ▲+3.6% Added · +357K sh | Q1 2026 | |
| 7 | Marex Group plc | $67.8M | 8.3M | ▼−18% Reduced · −1.8M sh | Q1 2026 | |
| 8 | UBS Group AG | $62.2M | 7.6M | ▼−21% Reduced · −2.0M sh | Q1 2026 | |
| 9 | GOLDMAN SACHS GROUP INC | $49.2M | 6.0M | ▲+61% Added · +2.3M sh | Q1 2026 | |
| 10 | MORGAN STANLEY | $42.6M | 5.2M | ▼−18% Reduced · −1.1M sh | Q1 2026 | |
| 11 | BANK OF AMERICA CORP /DE/ | $41.5M | 5.1M | ▲+49% Added · +1.7M sh | Q1 2026 | |
| 12 | NORGES BANK | $39.5M | 4.4M | ▲+16% Added · +619K sh | Q4 2025 | |
| 13 | JPMORGAN CHASE & CO | $36.4M | 4.7M | ▲+171% Added · +2.9M sh | Q1 2026 | |
| 14 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $33.5M | 4.1M | ▼−6.5% Reduced · −287K sh | Q1 2026 | |
| 15 | NORTHERN TRUST CORP | $27.3M | 3.3M | ▲+7.1% Added · +222K sh | Q1 2026 | |
| 16 | Bank of New York Mellon Corp | $20.1M | 2.5M | ▼−1.9% Reduced · −49K sh | Q1 2026 | |
| 17 | VANGUARD FIDUCIARY TRUST CO | $19.8M | 2.4M | ▲New +2.4M sh | Q1 2026 | |
| 18 | Clear Street Group Inc. | $19.2M | 2.3M | ▲+82% Added · +1.1M sh | Q1 2026 | |
| 19 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $17.3M | 2.1M | ▲+396% Added · +1.7M sh | Q1 2026 | |
| 20 | EXCHANGE TRADED CONCEPTS, LLC | $16.0M | 2.0M | ▲+27% Added · +417K sh | Q1 2026 | |
| 21 | PRINCIPAL FINANCIAL GROUP INC | $15.0M | 1.8M | ▲+2.0% Added · +36K sh | Q1 2026 | |
| 22 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $14.6M | 1.8M | ▼−6.2% Reduced · −119K sh | Q1 2026 | |
| 23 | WELLS FARGO & COMPANY/MN | $12.9M | 1.6M | ▼−10% Reduced · −183K sh | Q1 2026 | |
| 24 | Vident Advisory, LLC | $12.6M | 1.5M | ▼−8.8% Reduced · −149K sh | Q1 2026 | |
| 25 | PUBLIC SECTOR PENSION INVESTMENT BOARD | $11.0M | 1.4M | ▲+3.4% Added · +44K 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 |
|---|---|---|---|---|---|
| Mar 17, 2026 | Khan Salman Hassan | Chief Financial Officer | Sell (S) | 16K | $147K |
| Mar 17, 2026 | Thiel Frederick G | Chief Executive Officer, Director | Sell (S) | 28K | $252K |
| Feb 20, 2026 | Nowaid Zabi | General Counsel | Tax withholding (F) | 31K | $233K |
| Feb 20, 2026 | Thiel Frederick G | Chief Executive Officer, Director | Grant (A) | 752K | $0 |
| Feb 20, 2026 | Khan Salman Hassan | Chief Financial Officer | Tax withholding (F) | 78K | $583K |
| Feb 20, 2026 | Thiel Frederick G | Chief Executive Officer, Director | Tax withholding (F) | 91K | $685K |
| Feb 20, 2026 | Nowaid Zabi | General Counsel | Grant (A) | 198K | $0 |
| Feb 20, 2026 | Khan Salman Hassan | Chief Financial Officer | Grant (A) | 495K | $0 |
| Feb 18, 2026 | Nowaid Zabi | General Counsel | Grant (A) | 204K | $0 |
| Feb 18, 2026 | Khan Salman Hassan | Chief Financial Officer | Grant (A) | 509K | $0 |
| Feb 18, 2026 | Thiel Frederick G | Chief Executive Officer, Director | Grant (A) | 774K | $0 |
| Feb 17, 2026 | Khan Salman Hassan | Chief Financial Officer | Sell (S) | 16K | $123K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 123 funds | $49.2B |
| AMAZON.COM INCAMZN | 123 funds | $36.7B |
| TESLA INCTSLA | 123 funds | $16.0B |
| ELI LILLY & COLLY | 123 funds | $12.3B |
| APPLE INCAAPL | 122 funds | $57.6B |
| NVIDIA CORPNVDA | 121 funds | $74.3B |
| ALPHABET INC-CL AGOOGL | 121 funds | $31.0B |
| BROADCOM INCAVGO | 121 funds | $24.6B |
| META PLATFORMS INC-CLASS AMETA | 121 funds | $22.0B |
| MICRON TECHNOLOGY INCMU | 121 funds | $8.8B |
| COSTCO WHOLESALE CORPCOST | 121 funds | $8.5B |
| ADVANCED MICRO DEVICESAMD | 121 funds | $7.1B |
Ranked by how many of MARA'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 MARA. 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.