137 tracked 13F filers disclose a position in MTRX as of the latest SEC 13F filings, a combined $272.9M in reported value. 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.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $23.1M | 2.0M | ▼−45% Reduced · −1.7M sh | Q1 2026 | |
| 2 | NEEDHAM INVESTMENT MANAGEMENT LLC | $16.5M | 1.4M | —Held | Q1 2026 | |
| 3 | GENDELL JEFFREY L | $14.1M | 1.2M | ▲+16% Added · +174K sh | Q1 2026 | |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | $13.7M | 1.2M | →First observed position No prior filed position | Q1 2026 | |
| 5 | First Eagle Investment Management, LLC | $13.6M | 990K | —Held | Q3 2026 | |
| 6 | AMERICAN CENTURY COMPANIES INC | $11.3M | 982K | ▲+11% Added · +98K sh | Q1 2026 | |
| 7 | Harvey Partners, LLC | $10.4M | 905K | ▲+6.1% Added · +52K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $9.9M | 721K | ▲+5.2% Added · +36K sh | Q2 2026 | |
| 9 | Azarias Capital Management, L.P. | $9.2M | 674K | ▼−18% Reduced · −143K sh | Q2 2026 | |
| 10 | DIMENSIONAL FUND ADVISORS LP | $7.6M | 664K | ▼−0.7% Reduced · −5K sh | Q1 2026 | |
| 11 | TWO SIGMA INVESTMENTS, LP | $7.3M | 638K | ▲+218% Added · +437K sh | Q1 2026 | |
| 12 | WESTERLY CAPITAL MANAGEMENT, LLC | $8.2M | 596K | ▼−38% Reduced · −369K sh | Q2 2026 | |
| 13 | STATE STREET CORP | $8.0M | 581K | ▲+6.5% Added · +36K sh | Q2 2026 | |
| 14 | AQR CAPITAL MANAGEMENT LLC | $5.7M | 499K | ▲+37% Added · +134K sh | Q1 2026 | |
| 15 | MILLENNIUM MANAGEMENT LLC | $5.5M | 476K | ▼−2.1% Reduced · −10K sh | Q1 2026 | |
| 16 | CITADEL ADVISORS LLC | $5.4M | 472K | ▲+107% Added · +244K sh | Q1 2026 | |
| 17 | Bank of New York Mellon Corp | $5.4M | 467K | ▼−5.4% Reduced · −27K sh | Q1 2026 | |
| 18 | Russell Investments Group, Ltd. | $4.1M | 357K | ▼−8.9% Reduced · −35K sh | Q1 2026 | |
| 19 | JACOBS LEVY EQUITY MANAGEMENT, INC | $4.0M | 351K | ▲+7.6% Added · +25K sh | Q1 2026 | |
| 20 | MARSHALL WACE, LLP | $3.6M | 313K | ▲+895% Added · +282K sh | Q1 2026 | |
| 21 | JANE STREET GROUP, LLC | $3.6M | 313K | ▲+186% Added · +204K sh | Q1 2026 | |
| 22 | MORGAN STANLEY | $3.5M | 303K | ▲+4.3% Added · +12K sh | Q1 2026 | |
| 23 | PANAGORA ASSET MANAGEMENT INC | $4.1M | 299K | ▲+92% Added · +143K sh | Q2 2026 | |
| 24 | Connor, Clark & Lunn Investment Management Ltd. | $4.0M | 295K | ▼−19% Reduced · −68K sh | Q2 2026 | |
| 25 | Allspring Global Investments Holdings, LLC | $3.8M | 284K | ▲+246% Added · +202K sh | Q2 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.
Last quarter, 5 funds opened a new position in MTRX and 32 added to an existing one, while 19 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 70 funds | $145.5B |
| NVIDIA CORPNVDA | 67 funds | $211.4B |
| AMAZON.COM INCAMZN | 67 funds | $104.7B |
| ALPHABET INC-CL AGOOGL | 67 funds | $82.3B |
| META PLATFORMS INC-CLASS AMETA | 66 funds | $60.5B |
| JPMORGAN CHASE & COJPM | 65 funds | $32.4B |
| COSTCO WHOLESALE CORPCOST | 65 funds | $20.6B |
| LAM RESEARCH CORPLRCX | 65 funds | $18.3B |
| ROSS STORES INCROST | 65 funds | $8.2B |
| ELI LILLY & COLLY | 64 funds | $41.6B |
| TESLA INCTSLA | 64 funds | $37.1B |
| VISA INC-CLASS A SHARESV | 64 funds | $33.4B |
Ranked by how many of MTRX's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 15, 2026 | Cavanah Kevin S | VP Finance & CFO | Sell (S) | 1K | $20K |
| Jun 12, 2026 | SHEETS JUSTIN D | SVP, Enterprise Services | Sell (S) | 17K | $229K |
| Jun 12, 2026 | Cavanah Kevin S | VP Finance & CFO | Sell (S) | 2K | $29K |
| Jun 5, 2026 | Cavanah Kevin S | VP Finance & CFO | Sell (S) | 7K | $92K |
| Jun 4, 2026 | Cavanah Kevin S | VP Finance & CFO | Sell (S) | 50K | $705K |
| May 26, 2026 | Cavanah Kevin S | VP Finance & CFO | Sell (S) | 60K | $774K |
| May 8, 2026 | HEWITT JOHN R | President & CEO, Director | Sell (S) | 36K | $450K |
| 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 |
| Sep 16, 2025 | CHANDLER JOHN D | Director | Buy (P) | 2K | $29K |
Connected entities for MTRX
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MTRX/capital-change-brief"
Use Arkolith's capital_change_brief for MTRX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
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.