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/MATX/capital-change-brief"
Use Arkolith's capital_change_brief for MATX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $821.8M | 5.0M | ▼−1.2% Reduced · −62K sh | Q1 2026 | |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $332.1M | 2.0M | ▲New +2.0M sh | Q1 2026 | |
| 3 | DIMENSIONAL FUND ADVISORS LP | $319.1M | 1.9M | ▼−1.8% Reduced · −36K sh | Q1 2026 | |
| 4 | AMERICAN CENTURY COMPANIES INC | $246.3M | 1.5M | ▲+14% Added · +182K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $217.8M | 1.3M | ▲New +1.3M sh | Q1 2026 | |
| 6 | STATE STREET CORP | $198.0M | 1.2M | ▼~0% Reduced · −434 sh | Q1 2026 | |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $127.2M | 775K | ▲+1.3% Added · +10K sh | Q1 2026 | |
| 8 | FULLER & THALER ASSET MANAGEMENT, INC. | $100.5M | 613K | ▲+0.8% Added · +5K sh | Q1 2026 | |
| 9 | T. Rowe Price Investment Management, Inc. | Withheld | 528K | ▼−4.2% Reduced · −23K sh | Q1 2026 | |
| 10 | MORGAN STANLEY | $67.8M | 414K | ▼−3.9% Reduced · −17K sh | Q1 2026 | |
| 11 | NORTHERN TRUST CORP | $62.8M | 383K | ▲+0.6% Added · +2K sh | Q1 2026 | |
| 12 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $61.2M | 373K | ▼−0.4% Reduced · −1K sh | Q1 2026 | |
| 13 | FMR LLC | $53.2M | 324K | ▲+53% Added · +113K sh | Q1 2026 | |
| 14 | BALYASNY ASSET MANAGEMENT L.P. | $51.7M | 315K | ▲+53% Added · +109K sh | Q1 2026 | |
| 15 | Boston Partners | $47.8M | 291K | ▼−5.9% Reduced · −18K sh | Q1 2026 | |
| 16 | Bank of New York Mellon Corp | $43.3M | 264K | ▼−2.2% Reduced · −6K sh | Q1 2026 | |
| 17 | LONDON CO OF VIRGINIA | $40.0M | 244K | ▼−3.1% Reduced · −8K sh | Q1 2026 | |
| 18 | CAISSE DE DEPOT ET PLACEMENT DU QUEBEC | $39.9M | 243K | ▲+5.1% Added · +12K sh | Q1 2026 | |
| 19 | CITADEL ADVISORS LLC | $33.3M | 203K | ▼−15% Reduced · −37K sh | Q1 2026 | |
| 20 | BANK OF AMERICA CORP /DE/ | $32.9M | 201K | ▲+13% Added · +23K sh | Q1 2026 | |
| 21 | VANGUARD FIDUCIARY TRUST CO | $32.8M | 200K | ▲New +200K sh | Q1 2026 | |
| 22 | Encompass Capital Advisors LLC | $32.8M | 200K | ▲New +200K sh | Q1 2026 | |
| 23 | Qube Research & Technologies Ltd | $32.2M | 196K | ▲+43% Added · +59K sh | Q1 2026 | |
| 24 | GOLDMAN SACHS GROUP INC | $30.3M | 185K | ▼−3.9% Reduced · −7K sh | Q1 2026 | |
| 25 | D. E. Shaw & Co., Inc. | $28.9M | 177K | ▼−61% Reduced · −272K 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 |
|---|---|---|---|---|---|
| Jul 1, 2026 | Scott Christopher A | EVP & Chief Commercial Officer | Grant (A) | 246 | $0 |
| Jul 1, 2026 | Holland Jerome James | EVP | Tax withholding (F) | 64 | $13K |
| Jun 29, 2026 | COX MATTHEW J | Chairman & CEO, Director | Sell (S) | 4K | $813K |
| Jun 29, 2026 | COX MATTHEW J | Chairman & CEO, Director | Sell (S) | 3K | $589K |
| Jun 29, 2026 | COX MATTHEW J | Chairman & CEO, Director | Sell (S) | 3K | $527K |
| Jun 9, 2026 | KURIYAMA STANLEY M | Director | Gift (G) | 2K | $0 |
| Jun 8, 2026 | Rascon Laura L | Senior Vice President | Sell (S) | 100 | $19K |
| Jun 8, 2026 | Rascon Laura L | Senior Vice President | Sell (S) | 120 | $22K |
| Jun 8, 2026 | Rascon Laura L | Senior Vice President | Sell (S) | 550 | $105K |
| Jun 8, 2026 | Rascon Laura L | Senior Vice President | Sell (S) | 850 | $159K |
| Jun 8, 2026 | Rascon Laura L | Senior Vice President | Sell (S) | 1K | $223K |
| Jun 8, 2026 | COX MATTHEW J | Chairman & CEO, Director | Sell (S) | 147 | $27K |
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 134 funds | $49.9B |
| AMAZON.COM INCAMZN | 132 funds | $39.8B |
| VISA INC-CLASS A SHARESV | 132 funds | $11.1B |
| NVIDIA CORPNVDA | 131 funds | $67.0B |
| ELI LILLY & COLLY | 131 funds | $12.9B |
| COSTCO WHOLESALE CORPCOST | 130 funds | $9.0B |
| UNITEDHEALTH GROUP INCUNH | 130 funds | $5.9B |
| BANK OF AMERICA CORPBAC | 130 funds | $5.3B |
| APPLE INCAAPL | 129 funds | $58.5B |
| ALPHABET INC-CL AGOOGL | 129 funds | $33.1B |
| BROADCOM INCAVGO | 129 funds | $25.9B |
| META PLATFORMS INC-CLASS AMETA | 128 funds | $22.8B |
Ranked by how many of MATX'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 MATX. 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.