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 MPAA 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/MPAA"
Use Arkolith to show who owns MPAA, which funds added or reduced it, and which SEC filings prove each claim.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | 325 CAPITAL LLC | $22.3M | 2.0M | —Held | Q1 2026 | |
| 2 | DONALD SMITH & CO., INC. | $13.9M | 1.3M | ▲+31% Added · +300K sh | Q1 2026 | |
| 3 | DIMENSIONAL FUND ADVISORS LP | $12.5M | 1.1M | ▲+5.3% Added · +57K sh | Q1 2026 | |
| 4 | VANGUARD GROUP INC | $12.0M | 976K | ▼−0.5% Reduced · −5K sh | Q4 2025 | |
| 5 | BlackRock, Inc. | $10.9M | 987K | ▼−1.2% Reduced · −12K sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $8.7M | 784K | ▲New +784K sh | Q1 2026 | |
| 7 | AMERICAN CENTURY COMPANIES INC | $7.0M | 635K | ▲+10.0% Added · +58K sh | Q1 2026 | |
| 8 | JPMORGAN CHASE & CO | $5.7M | 529K | ▲+19% Added · +84K sh | Q1 2026 | |
| 9 | MORGAN STANLEY | $5.0M | 456K | ▲+4.7% Added · +21K sh | Q1 2026 | |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | $4.4M | 394K | ▲+3.4% Added · +13K sh | Q1 2026 | |
| 11 | AQR CAPITAL MANAGEMENT LLC | $3.4M | 309K | ▲+12% Added · +33K sh | Q1 2026 | |
| 12 | STATE STREET CORP | $2.9M | 264K | ▼−2.6% Reduced · −7K sh | Q1 2026 | |
| 13 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $2.4M | 221K | ▼−2.5% Reduced · −6K sh | Q1 2026 | |
| 14 | KENNEDY CAPITAL MANAGEMENT LLC | $2.3M | 206K | ▲New +206K sh | Q1 2026 | |
| 15 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $2.2M | 201K | ▲+3.8% Added · +7K sh | Q1 2026 | |
| 16 | O'SHAUGHNESSY ASSET MANAGEMENT, LLC | $2.0M | 182K | ▼−28% Reduced · −72K sh | Q1 2026 | |
| 17 | NORTHERN TRUST CORP | $1.3M | 122K | ▲+2.1% Added · +3K sh | Q1 2026 | |
| 18 | AMERIPRISE FINANCIAL INC | $1.3M | 118K | ▼−40% Reduced · −80K sh | Q1 2026 | |
| 19 | VANGUARD FIDUCIARY TRUST CO | $1.3M | 117K | ▲New +117K sh | Q1 2026 | |
| 20 | TWO SIGMA INVESTMENTS, LP | $1.3M | 115K | ▲+25% Added · +23K sh | Q1 2026 | |
| 21 | CITADEL ADVISORS LLC | $1.2M | 105K | ▲+105% Added · +54K sh | Q1 2026 | |
| 22 | Russell Investments Group, Ltd. | $1.0M | 95K | ▼−30% Reduced · −41K sh | Q1 2026 | |
| 23 | VICTORY CAPITAL MANAGEMENT INC | $940K | 85K | ▲+31% Added · +20K sh | Q1 2026 | |
| 24 | Empowered Funds, LLC | $891K | 81K | ▲New +81K sh | Q1 2026 | |
| 25 | VANGUARD PORTFOLIO MANAGEMENT LLC | $856K | 77K | ▲New +77K 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 |
|---|---|---|---|---|---|
| Feb 12, 2026 | Bryan David | Director | Buy (P) | 1K | $10K |
| Jan 2, 2026 | Warfield Patricia W | Director | Option exercise (M) | 2K | $0 |
| Jan 2, 2026 | Warfield Patricia W | Director | Option exercise (M) | 2K | $0 |
| Nov 25, 2025 | Shah Kamlesh | Chief Accounting Officer | Tax withholding (F) | 665 | $9K |
| Nov 25, 2025 | SELWYN JOFFE | President, CEO & Chairman, Director | Option exercise (M) | 10K | $0 |
| Nov 25, 2025 | Schooner Douglas Earl | Chief Manufacturing Officer | Tax withholding (F) | 518 | $7K |
| Nov 25, 2025 | Schooner Douglas Earl | Chief Manufacturing Officer | Option exercise (M) | 1K | $0 |
| Nov 25, 2025 | Shah Kamlesh | Chief Accounting Officer | Option exercise (M) | 2K | $0 |
| Nov 25, 2025 | Shah Kamlesh | Chief Accounting Officer | Option exercise (M) | 2K | $0 |
| Nov 25, 2025 | Stone Juliet Lynn | VP, Gen Counsel and Secretary | Tax withholding (F) | 887 | $12K |
| Nov 25, 2025 | Stone Juliet Lynn | VP, Gen Counsel and Secretary | Option exercise (M) | 2K | $0 |
| Nov 25, 2025 | Stone Juliet Lynn | VP, Gen Counsel and Secretary | Option exercise (M) | 2K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| NVIDIA CORPNVDA | 26 funds | $17.6B |
| APPLE INCAAPL | 26 funds | $14.7B |
| MICROSOFT CORPMSFT | 26 funds | $11.8B |
| AMAZON.COM INCAMZN | 26 funds | $8.7B |
| ALPHABET INC-CL AGOOGL | 26 funds | $7.6B |
| BROADCOM INCAVGO | 26 funds | $7.0B |
| META PLATFORMS INC-CLASS AMETA | 26 funds | $5.3B |
| ELI LILLY & COLLY | 26 funds | $3.3B |
| TESLA INCTSLA | 26 funds | $2.9B |
| COSTCO WHOLESALE CORPCOST | 26 funds | $2.5B |
| EXXON MOBIL CORPXOM | 26 funds | $2.3B |
| JOHNSON & JOHNSONJNJ | 26 funds | $2.2B |
Ranked by how many of MPAA'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 MPAA. 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.