Who owns MATX (MATX)
Which tracked institutional funds hold MATX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MATX company fundamentals →
Ownership as of the 2026-Q1 13F filings. 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on MATX is one-sided between 2025-Q4 and 2026-Q1: 142 added or opened and 35 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
MATX’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes MATX more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in MATX divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 394 tracked filers holding MATX, 193 increased or opened the position and 176 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in MATX between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 20
- VANGUARD PORTFOLIO MANAGEMENT LLC$332M
- VANGUARD CAPITAL MANAGEMENT LLC$218M
- VANGUARD FIDUCIARY TRUST CO$33M
- Encompass Capital Advisors LLC$33M
- SCHRODER INVESTMENT MANAGEMENT GROUP$6M
- KBC Group NV$6M
Full exits 15
- VANGUARD GROUP INC$449M
- STEADFAST CAPITAL MANAGEMENT LP$8M
- TUDOR INVESTMENT CORP ET AL$6M
- Trexquant Investment LP$4M
- COMERICA BANK$3M
- Federation des caisses Desjardins du Quebec$2M
Largest adds
- BlackRock, Inc.$97M
- AMERICAN CENTURY COMPANIES INC$83M
- DIMENSIONAL FUND ADVISORS LP$74M
- T. Rowe Price Investment Management, Inc.$60M
- STATE STREET CORP$49M
- GEODE CAPITAL MANAGEMENT, LLC$33M
Largest trims
- D. E. Shaw & Co., Inc.$26M
- AMERIPRISE FINANCIAL INC$19M
- SILVERCREST ASSET MANAGEMENT GROUP LLC$9M
- JANE STREET GROUP, LLC$5M
- BARCLAYS PLC$5M
- HRT FINANCIAL LP$5M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 4,418,349 | $724M | 15.9% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 2,025,537 | $332M | 7.3% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,946,740 | $319M | 7.0% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 1,502,657 | $246M | 5.4% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 1,328,304 | $218M | 4.8% | 2026-Q1 |
| STATE STREET CORP trimmed | 1,207,716 | $198M | 4.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 775,419 | $127M | 2.8% | 2026-Q1 |
| Capital Research Global Investors trimmed | 635,093 | $104M | 2.3% | 2026-Q1 |
| FULLER & THALER ASSET MANAGEMENT, INC. added | 613,241 | $101M | 2.2% | 2026-Q1 |
| T. Rowe Price Investment Management, Inc. added | 527,839 | $87M | 1.9% | 2026-Q1 |
| MORGAN STANLEY trimmed | 413,611 | $68M | 1.5% | 2026-Q1 |
| NORTHERN TRUST CORP added | 383,209 | $63M | 1.4% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 373,273 | $61M | 1.3% | 2026-Q1 |
| FMR LLC added | 317,551 | $52M | 1.1% | 2026-Q1 |
| BALYASNY ASSET MANAGEMENT L.P. added | 315,183 | $52M | 1.1% | 2026-Q1 |
| LSV ASSET MANAGEMENT added | 309,340 | $51M | 1.1% | 2026-Q1 |
| Boston Partners trimmed | 291,067 | $48M | 1.1% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 263,820 | $43M | 1.0% | 2026-Q1 |
| LONDON CO OF VIRGINIA trimmed | 244,282 | $40M | 0.9% | 2026-Q1 |
| Caisse de depot et placement du Quebec added | 243,340 | $40M | 0.9% | 2026-Q1 |
| ALGERT GLOBAL LLC trimmed | 222,914 | $37M | 0.8% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 203,005 | $33M | 0.7% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 200,926 | $33M | 0.7% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 200,268 | $33M | 0.7% | 2026-Q1 |
| Encompass Capital Advisors LLC trimmed | 199,834 | $33M | 0.7% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 196,216 | $32M | 0.7% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC trimmed | 184,582 | $30M | 0.7% | 2026-Q1 |
| D. E. Shaw & Co., Inc. trimmed | 176,547 | $29M | 0.6% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 176,253 | $29M | 0.6% | 2026-Q1 |
| ROYCE & ASSOCIATES LP added | 173,982 | $29M | 0.6% | 2026-Q1 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC added | 167,129 | $27M | 0.6% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 161,513 | $25M | 0.6% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 151,520 | $25M | 0.5% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 146,088 | $24M | 0.5% | 2026-Q1 |
| Invesco Ltd. trimmed | 120,254 | $20M | 0.4% | 2026-Q1 |
| Public Sector Pension Investment Board added | 111,550 | $18M | 0.4% | 2026-Q1 |
| SILVERCREST ASSET MANAGEMENT GROUP LLC trimmed | 107,662 | $18M | 0.4% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 100,455 | $16M | 0.4% | 2026-Q1 |
| Baird Financial Group, Inc. added | 97,065 | $16M | 0.3% | 2026-Q1 |
| Nuveen, LLC trimmed | 94,545 | $15M | 0.3% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 94,236 | $15M | 0.3% | 2026-Q1 |
| Hudson Bay Capital Management LP added | 92,599 | $15M | 0.3% | 2026-Q1 |
| Verition Fund Management LLC added | 89,558 | $15M | 0.3% | 2026-Q1 |
| WEDGE CAPITAL MANAGEMENT L L P/NC trimmed | 89,264 | $15M | 0.3% | 2026-Q1 |
| Paradiem, LLC trimmed | 88,082 | $14M | 0.3% | 2026-Q1 |
| LOOMIS SAYLES & CO L P trimmed | 87,669 | $14M | 0.3% | 2026-Q1 |
| FRANKLIN RESOURCES INC added | 85,930 | $14M | 0.3% | 2026-Q1 |
| UBS Group AG trimmed | 82,767 | $14M | 0.3% | 2026-Q1 |
| NORGES BANK trimmed | 104,495 | $13M | 0.3% | 2026-Q1 |
| FIRST TRUST ADVISORS LP added | 81,319 | $13M | 0.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 80,385 | $13M | 0.3% | 2026-Q1 |
| SummitTX Capital, L.P. added | 72,827 | $12M | 0.3% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 69,321 | $11M | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 62,843 | $10M | 0.2% | 2026-Q1 |
| Legal & General Group Plc trimmed | 62,667 | $10M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 61,870 | $10M | 0.2% | 2026-Q1 |
| Cambria Investment Management, L.P. trimmed | 61,481 | $10M | 0.2% | 2026-Q1 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 61,229 | $10M | 0.2% | 2026-Q1 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | 60,188 | $10M | 0.2% | 2026-Q1 |
| SG Americas Securities, LLC added | 57,586 | $9M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 57,279 | $9M | 0.2% | 2026-Q1 |
| Lighthouse Investment Partners, LLC trimmed | 56,115 | $9M | 0.2% | 2026-Q1 |
| Cerity Partners LLC added | 55,216 | $9M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN trimmed | 54,586 | $9M | 0.2% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC trimmed | 52,943 | $9M | 0.2% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 49,979 | $8M | 0.2% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 49,783 | $8M | 0.2% | 2026-Q1 |
| PRUDENTIAL FINANCIAL INC trimmed | 45,947 | $8M | 0.2% | 2026-Q1 |
| Edgestream Partners, L.P. added | 45,745 | $7M | 0.2% | 2026-Q1 |
| ProShare Advisors LLC trimmed | 45,394 | $7M | 0.2% | 2026-Q1 |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM trimmed | 38,678 | $6M | 0.1% | 2026-Q1 |
| New Age Alpha Advisors, LLC trimmed | 38,574 | $6M | 0.1% | 2026-Q1 |
| Linden Thomas Advisory Services, LLC added | 38,453 | $6M | 0.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 38,277 | $6M | 0.1% | 2026-Q1 |
| CKW FINANCIAL GROUP | 37,436 | $6M | 0.1% | 2026-Q1 |
| ASSETMARK, INC trimmed | 35,906 | $6M | 0.1% | 2026-Q1 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 35,401 | $6M | 0.1% | 2026-Q1 |
| SCHRODER INVESTMENT MANAGEMENT GROUP added | 36,365 | $6M | 0.1% | 2026-Q1 |
| KBC Group NV added | 34,780 | $6M | 0.1% | 2026-Q1 |
| BESSEMER GROUP INC added | 30,624 | $5M | 0.1% | 2026-Q1 |
| LPL Financial LLC added | 30,124 | $5M | 0.1% | 2026-Q1 |
| Creative Planning added | 29,931 | $5M | 0.1% | 2026-Q1 |
| CHATHAM CAPITAL GROUP, INC. trimmed | 29,073 | $5M | 0.1% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 28,563 | $5M | 0.1% | 2026-Q1 |
| Tidal Investments LLC trimmed | 27,563 | $5M | 0.1% | 2026-Q1 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC trimmed | 26,977 | $4M | 0.1% | 2026-Q1 |
| SEI INVESTMENTS CO added | 26,087 | $4M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 3,637,311 | $449M | 9.9% | 2025-Q4 stale |
| Forest Avenue Capital Management LP added | 413,423 | $46M | 1.0% | 2025-Q2 stale |
| Park West Asset Management LLC added | 300,000 | $33M | 0.7% | 2025-Q2 stale |
| Flat Footed LLC new | 314,076 | $31M | 0.7% | 2025-Q3 stale |
| Brandywine Global Investment Management, LLC trimmed | 115,234 | $13M | 0.3% | 2025-Q2 stale |
| ADAGE CAPITAL PARTNERS GP, L.L.C. new | 85,150 | $9M | 0.2% | 2025-Q2 stale |
| Cubist Systematic Strategies, LLC added | 73,582 | $9M | 0.2% | 2025-Q1 stale |
| STEADFAST CAPITAL MANAGEMENT LP new | 63,200 | $8M | 0.2% | 2025-Q4 stale |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 55,291 | $7M | 0.2% | 2025-Q1 stale |
| TUDOR INVESTMENT CORP ET AL | 57,850 | $6M | 0.1% | 2025-Q4 stale |
| ExodusPoint Capital Management, LP added | 55,392 | $5M | 0.1% | 2025-Q3 stale |
| Concentric Capital Strategies, LP added | 46,611 | $5M | 0.1% | 2025-Q2 stale |
| BI Asset Management Fondsmaeglerselskab A/S trimmed | 47,658 | $5M | 0.1% | 2025-Q3 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.