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 MTX 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/MTX"
Use Arkolith to show who owns MTX, 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. | $341.2M | 4.8M | ▲+0.8% Added · +38K sh | Q1 2026 | |
| 2 | FMR LLC | $302.4M | 4.3M | ▲+57% Added · +1.5M sh | Q1 2026 | |
| 3 | VANGUARD GROUP INC | $214.7M | 3.5M | ▼−1.5% Reduced · −53K sh | Q4 2025 | |
| 4 | DIMENSIONAL FUND ADVISORS LP | $140.0M | 2.0M | ▼~0% Reduced · −619 sh | Q1 2026 | |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | $134.8M | 1.9M | ▲New +1.9M sh | Q1 2026 | |
| 6 | VANGUARD CAPITAL MANAGEMENT LLC | $97.0M | 1.4M | ▲New +1.4M sh | Q1 2026 | |
| 7 | STATE STREET CORP | $85.8M | 1.2M | ▼−1.0% Reduced · −12K sh | Q1 2026 | |
| 8 | AMERICAN CENTURY COMPANIES INC | $72.3M | 1.0M | ▼−23% Reduced · −299K sh | Q1 2026 | |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | $67.9M | 957K | ▲+6.6% Added · +60K sh | Q1 2026 | |
| 10 | BRANDES INVESTMENT PARTNERS, LP | $59.6M | 841K | ▲+2.6% Added · +21K sh | Q1 2026 | |
| 11 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $39.8M | 561K | ▲+41% Added · +162K sh | Q1 2026 | |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $38.8M | 547K | ▼−8.4% Reduced · −50K sh | Q1 2026 | |
| 13 | SNYDER CAPITAL MANAGEMENT L P | $35.6M | 501K | ▼−7.1% Reduced · −38K sh | Q1 2026 | |
| 14 | AMERIPRISE FINANCIAL INC | $33.3M | 469K | ▲+3.4% Added · +15K sh | Q1 2026 | |
| 15 | Nuveen, LLC | $28.8M | 406K | ▲+1.2% Added · +5K sh | Q1 2026 | |
| 16 | D. E. Shaw & Co., Inc. | $26.0M | 367K | ▼−9.2% Reduced · −37K sh | Q1 2026 | |
| 17 | Allspring Global Investments Holdings, LLC | $24.9M | 348K | ▼−15% Reduced · −61K sh | Q1 2026 | |
| 18 | GOLDMAN SACHS GROUP INC | $24.9M | 350K | ▲+13% Added · +40K sh | Q1 2026 | |
| 19 | NORTHERN TRUST CORP | $24.2M | 341K | ▲+5.7% Added · +18K sh | Q1 2026 | |
| 20 | BANK OF AMERICA CORP /DE/ | $23.8M | 335K | ▼−0.3% Reduced · −1K sh | Q1 2026 | |
| 21 | MORGAN STANLEY | $19.5M | 274K | ▼−2.8% Reduced · −8K sh | Q1 2026 | |
| 22 | Bank of New York Mellon Corp | $19.2M | 271K | ▼−2.4% Reduced · −7K sh | Q1 2026 | |
| 23 | GAMCO INVESTORS, INC. ET AL | $18.0M | 255K | ▼−7.8% Reduced · −22K sh | Q1 2026 | |
| 24 | AQR CAPITAL MANAGEMENT LLC | $15.4M | 217K | ▲+33% Added · +53K sh | Q1 2026 | |
| 25 | VANGUARD FIDUCIARY TRUST CO | $14.3M | 201K | ▲New +201K 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 6, 2026 | Motwani Rocky | Director | Grant (A) | 11 | $0 |
| Mar 6, 2026 | PITTMAN CAROLYN K | Director | Grant (A) | 33 | $0 |
| Mar 6, 2026 | FEDER FRANKLIN | Director | Grant (A) | 41 | $0 |
| Mar 6, 2026 | CLARK ROBERT L | Director | Grant (A) | 56 | $0 |
| Mar 6, 2026 | ROBINSON MARC E | Director | Grant (A) | 44 | $0 |
| Mar 6, 2026 | Breunig Joseph C. | Director | Grant (A) | 35 | $0 |
| Mar 6, 2026 | CARMOLA JOHN J | Director | Grant (A) | 46 | $0 |
| Mar 6, 2026 | JOHNSON KRISTINA M | Director | Grant (A) | 7 | $0 |
| Mar 6, 2026 | Deans Alison Ann | Director | Grant (A) | 27 | $0 |
| Jan 26, 2026 | CIPOLLA MICHAEL | VICE PRESIDENT | Option exercise (M) | 1K | $0 |
| Jan 26, 2026 | CUTLER ERIN | VP, Human Resources | Tax withholding (F) | 520 | $36K |
| Jan 26, 2026 | CUTLER ERIN | VP, Human Resources | Option exercise (M) | 1K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 85 funds | $44.8B |
| BROADCOM INCAVGO | 85 funds | $23.2B |
| META PLATFORMS INC-CLASS AMETA | 85 funds | $18.7B |
| TESLA INCTSLA | 85 funds | $12.2B |
| ELI LILLY & COLLY | 85 funds | $11.5B |
| VISA INC-CLASS A SHARESV | 85 funds | $8.5B |
| MICRON TECHNOLOGY INCMU | 85 funds | $8.1B |
| COSTCO WHOLESALE CORPCOST | 85 funds | $7.5B |
| UNITEDHEALTH GROUP INCUNH | 85 funds | $4.3B |
| BRISTOL-MYERS SQUIBB COBMY | 85 funds | $2.7B |
| NVIDIA CORPNVDA | 84 funds | $60.7B |
| APPLE INCAAPL | 84 funds | $51.4B |
Ranked by how many of MTX'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 MTX. 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.