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 MTRX 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/MTRX"
Use Arkolith to show who owns MTRX, 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. | $23.1M | 2.0M | ▼−45% Reduced · −1.7M sh | Q1 2026 | |
| 2 | VANGUARD GROUP INC | $17.9M | 1.5M | ▲+0.3% Added · +4K sh | Q4 2025 | |
| 3 | NEEDHAM INVESTMENT MANAGEMENT LLC | $16.5M | 1.4M | —Held | Q1 2026 | |
| 4 | GENDELL JEFFREY L | $14.1M | 1.2M | ▲+16% Added · +174K sh | Q1 2026 | |
| 5 | First Eagle Investment Management, LLC | $9.8M | 851K | ▲+33% Added · +211K sh | Q1 2026 | |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | $7.9M | 685K | ▲+2.6% Added · +17K sh | Q1 2026 | |
| 7 | STATE STREET CORP | $6.3M | 545K | ▲+2.2% Added · +12K sh | Q1 2026 | |
| 8 | CITADEL ADVISORS LLC | $5.4M | 472K | ▲+107% Added · +244K sh | Q1 2026 | |
| 9 | CenterBook Partners LP | $5.0M | 431K | ▼−32% Reduced · −203K sh | Q1 2026 | |
| 10 | Connor, Clark & Lunn Investment Management Ltd. | $4.2M | 363K | ▼−6.1% Reduced · −24K sh | Q1 2026 | |
| 11 | JACOBS LEVY EQUITY MANAGEMENT, INC | $4.0M | 351K | ▲+7.6% Added · +25K sh | Q1 2026 | |
| 12 | VANGUARD PORTFOLIO MANAGEMENT LLC | $2.2M | 188K | ▲New +188K sh | Q1 2026 | |
| 13 | VANGUARD FIDUCIARY TRUST CO | $2.1M | 181K | ▲New +181K sh | Q1 2026 | |
| 14 | COUNTRY TRUST BANK | $1.9M | 165K | ▲+25% Added · +33K sh | Q1 2026 | |
| 15 | PANAGORA ASSET MANAGEMENT INC | $1.8M | 156K | ▲+6.8% Added · +10K sh | Q1 2026 | |
| 16 | MONEY CONCEPTS CAPITAL CORP | $1.2M | 104K | ▼−0.3% Reduced · −312 sh | Q1 2026 | |
| 17 | Allspring Global Investments Holdings, LLC | $963K | 82K | ▲+428% Added · +66K sh | Q1 2026 | |
| 18 | WINTON GROUP Ltd | $494K | 43K | ▼−50% Reduced · −43K sh | Q1 2026 | |
| 19 | Man Group plc | $446K | 39K | ▼−31% Reduced · −17K sh | Q1 2026 | |
| 20 | PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | $415K | 36K | ▲+32% Added · +9K sh | Q1 2026 | |
| 21 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | $390K | 34K | ▲+42% Added · +10K sh | Q1 2026 | |
| 22 | BAILARD, INC. | $284K | 25K | ▲New +25K sh | Q1 2026 | |
| 23 | Walleye Capital LLC | $277K | 24K | ▲New +24K sh | Q1 2026 | |
| 24 | Aquatic Capital Management LLC | $264K | 23K | ▲+177% Added · +15K sh | Q1 2026 | |
| 25 | Point72 Asset Management, L.P. | $256K | 22K | ▼−81% Reduced · −94K 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 15, 2026 | Cavanah Kevin S | VP Finance & CFO | Sell (S) | 1K | $20K |
| Jun 12, 2026 | Cavanah Kevin S | VP Finance & CFO | Sell (S) | 2K | $29K |
| Jun 12, 2026 | SHEETS JUSTIN D | SVP, Enterprise Services | Sell (S) | 17K | $229K |
| Feb 18, 2026 | AUSTIN NANCY E | VP, Chief Admin Officer | Sell (S) | 4K | $47K |
| Nov 25, 2025 | PAYNE SHAWN P | President, Eng & Constr | Sell (S) | 5K | $60K |
| Nov 20, 2025 | PAYNE SHAWN P | President, Eng & Constr | Sell (S) | 3K | $34K |
| Nov 11, 2025 | PAYNE SHAWN P | President, Eng & Constr | Sell (S) | 8K | $104K |
| Nov 4, 2025 | Conner Carlin G. | Director | Grant (A) | 8K | $0 |
| Nov 4, 2025 | Carnes Martha Z. | Director | Grant (A) | 8K | $0 |
| Nov 4, 2025 | Bustamante Jose Luis M. | Director | Grant (A) | 8K | $0 |
| Nov 4, 2025 | CHANDLER JOHN D | Director | Grant (A) | 8K | $0 |
| Nov 4, 2025 | MILLER JAMES HARRY | Director | Grant (A) | 8K | $0 |
| Company | Co-held by | Combined value |
|---|---|---|
| APPLE INCAAPL | 41 funds | $18.2B |
| MICROSOFT CORPMSFT | 41 funds | $14.7B |
| ALPHABET INC-CL AGOOGL | 40 funds | $9.2B |
| AMAZON.COM INCAMZN | 39 funds | $11.6B |
| META PLATFORMS INC-CLASS AMETA | 39 funds | $9.0B |
| ELI LILLY & COLLY | 39 funds | $4.3B |
| MICRON TECHNOLOGY INCMU | 39 funds | $4.0B |
| CARDINAL HEALTH INCCAH | 39 funds | $1.0B |
| NVIDIA CORPNVDA | 38 funds | $23.9B |
| ALPHABET INC-CL CGOOG | 38 funds | $9.6B |
| BROADCOM INCAVGO | 38 funds | $8.8B |
| EXXON MOBIL CORPXOM | 38 funds | $3.9B |
Ranked by how many of MTRX'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 MTRX. 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.