Who owns Matrix Service (MTRX)
Which tracked institutional funds hold MTRX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See MTRX company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 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 MTRX is one-sided between 2026-Q1 and 2026-Q2: 48 added or opened and 14 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
MTRX’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 MTRX more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in MTRX 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 2026-Q1 and 2026-Q2, across 144 tracked filers holding MTRX, 86 increased or opened the position and 62 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 MTRX between the 2026-Q1 and 2026-Q2 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 4
- NORGES BANK$2M
- Trexquant Investment LP$2M
- Archon Capital Management LLC$959K
- Y-Intercept (Hong Kong) Ltd$501K
Full exits 5
- ACADIAN ASSET MANAGEMENT LLC$5M
- Congruence Capital, LLC$3M
- GSA CAPITAL PARTNERS LLP$2M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$2M
- HRT FINANCIAL LP$1M
Largest adds
- BlackRock, Inc.$6M
- AMERICAN CENTURY COMPANIES INC$5M
- First Eagle Investment Management, LLC$4M
- JPMORGAN CHASE & CO$3M
- NEEDHAM INVESTMENT MANAGEMENT LLC$3M
- D. E. Shaw & Co., Inc.$3M
Largest trims
- MILLENNIUM MANAGEMENT LLC$4M
- WESTERLY CAPITAL MANAGEMENT, LLC$3M
- CenterBook Partners LP$3M
- JANE STREET GROUP, LLC$2M
- COUNTRY TRUST BANK$1M
- ExodusPoint Capital Management, LP$582K
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 2,139,456 | $29M | 9.0% | 2026-Q2 |
| NEEDHAM INVESTMENT MANAGEMENT LLC | 1,435,000 | $20M | 6.1% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 1,206,822 | $17M | 5.1% | 2026-Q2 |
| GENDELL JEFFREY L trimmed | 1,192,529 | $16M | 5.0% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 1,188,393 | $16M | 5.0% | 2026-Q2 |
| First Eagle Investment Management, LLC added | 990,217 | $14M | 4.2% | 2026-Q2 |
| Harvey Partners, LLC trimmed | 815,023 | $11M | 3.4% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 748,118 | $10M | 3.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 721,322 | $10M | 3.0% | 2026-Q2 |
| Azarias Capital Management, L.P. trimmed | 673,692 | $9M | 2.8% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 665,266 | $9M | 2.8% | 2026-Q2 |
| WESTERLY CAPITAL MANAGEMENT, LLC trimmed | 595,930 | $8M | 2.5% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 594,197 | $8M | 2.5% | 2026-Q2 |
| STATE STREET CORP added | 581,006 | $8M | 2.5% | 2026-Q2 |
| FIRST WILSHIRE SECURITIES MANAGEMENT INC trimmed | 517,121 | $7M | 2.2% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 460,466 | $6M | 1.9% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 457,365 | $6M | 1.9% | 2026-Q2 |
| MORGAN STANLEY added | 437,019 | $6M | 1.8% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 426,023 | $6M | 1.8% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC trimmed | 325,825 | $4M | 1.4% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 315,376 | $4M | 1.3% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 299,431 | $4M | 1.3% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. trimmed | 295,422 | $4M | 1.2% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 287,612 | $4M | 1.2% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 283,513 | $4M | 1.2% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 282,559 | $4M | 1.2% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 279,195 | $4M | 1.2% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 266,486 | $4M | 1.1% | 2026-Q2 |
| De Lisle Partners LLP | 258,790 | $4M | 1.1% | 2026-Q2 |
| NORTHERN TRUST CORP added | 254,670 | $3M | 1.1% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 244,585 | $3M | 1.0% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 235,777 | $3M | 1.0% | 2026-Q2 |
| Qube Research & Technologies Ltd added | 225,869 | $3M | 1.0% | 2026-Q2 |
| MARSHALL WACE, LLP trimmed | 223,310 | $3M | 0.9% | 2026-Q2 |
| Man Group plc added | 194,010 | $3M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 189,639 | $3M | 0.8% | 2026-Q2 |
| CenterBook Partners LP trimmed | 154,058 | $2M | 0.7% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 135,823 | $2M | 0.6% | 2026-Q2 |
| NORGES BANK new | 126,500 | $2M | 0.5% | 2026-Q2 |
| Trexquant Investment LP added | 122,418 | $2M | 0.5% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 118,126 | $2M | 0.5% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 116,280 | $1M | 0.4% | 2026-Q2 |
| Prescott Group Capital Management, L.L.C. trimmed | 114,392 | $2M | 0.5% | 2026-Q2 |
| JANE STREET GROUP, LLC trimmed | 106,381 | $1M | 0.4% | 2026-Q2 |
| MONEY CONCEPTS CAPITAL CORP trimmed | 103,723 | $1M | 0.4% | 2026-Q2 |
| CARY STREET PARTNERS FINANCIAL LLC added | 96,510 | $1M | 0.4% | 2026-Q2 |
| Walleye Capital LLC added | 96,242 | $1M | 0.4% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 87,394 | $1M | 0.4% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 75,461 | $1M | 0.3% | 2026-Q2 |
| Jump Financial, LLC trimmed | 74,520 | $1M | 0.3% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 73,400 | $1M | 0.3% | 2026-Q2 |
| Archon Capital Management LLC new | 70,000 | $959K | 0.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 64,510 | $884K | 0.3% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 57,652 | $790K | 0.2% | 2026-Q2 |
| Point72 Asset Management, L.P. added | 56,591 | $775K | 0.2% | 2026-Q2 |
| WINTON GROUP Ltd added | 56,121 | $769K | 0.2% | 2026-Q2 |
| Nuveen, LLC added | 54,378 | $745K | 0.2% | 2026-Q2 |
| XTX Topco Ltd trimmed | 54,338 | $744K | 0.2% | 2026-Q2 |
| Pacific Ridge Capital Partners, LLC trimmed | 53,779 | $737K | 0.2% | 2026-Q2 |
| MARTINGALE ASSET MANAGEMENT L P trimmed | 53,702 | $736K | 0.2% | 2026-Q2 |
| UBS Group AG added | 53,039 | $727K | 0.2% | 2026-Q2 |
| VERUS CAPITAL PARTNERS, LLC added | 52,175 | $715K | 0.2% | 2026-Q2 |
| OCCUDO QUANTITATIVE STRATEGIES LP added | 51,976 | $712K | 0.2% | 2026-Q2 |
| Squarepoint Ops LLC trimmed | 51,297 | $703K | 0.2% | 2026-Q2 |
| STRS OHIO trimmed | 49,700 | $681K | 0.2% | 2026-Q2 |
| Financial Plan, Inc. | 47,615 | $652K | 0.2% | 2026-Q2 |
| COUNTRY TRUST BANK trimmed | 45,237 | $620K | 0.2% | 2026-Q2 |
| EntryPoint Capital, LLC added | 44,036 | $603K | 0.2% | 2026-Q2 |
| Invesco Ltd. trimmed | 42,761 | $586K | 0.2% | 2026-Q2 |
| CITIGROUP INC added | 40,587 | $556K | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 40,425 | $554K | 0.2% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC added | 40,114 | $550K | 0.2% | 2026-Q2 |
| Boston Partners trimmed | 38,994 | $534K | 0.2% | 2026-Q2 |
| Y-Intercept (Hong Kong) Ltd added | 36,536 | $501K | 0.2% | 2026-Q2 |
| PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO | 36,109 | $495K | 0.2% | 2026-Q2 |
| Dynamic Technology Lab Private Ltd added | 34,977 | $479K | 0.1% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 34,188 | $468K | 0.1% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | 34,000 | $466K | 0.1% | 2026-Q2 |
| LOS ANGELES CAPITAL MANAGEMENT LLC added | 31,169 | $427K | 0.1% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 29,351 | $402K | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 29,271 | $401K | 0.1% | 2026-Q2 |
| Brevan Howard Capital Management LP trimmed | 28,985 | $397K | 0.1% | 2026-Q2 |
| Hillsdale Investment Management Inc. new | 28,900 | $396K | 0.1% | 2026-Q2 |
| Schonfeld Strategic Advisors LLC new | 28,024 | $384K | 0.1% | 2026-Q2 |
| Creative Planning added | 27,612 | $378K | 0.1% | 2026-Q2 |
| Assenagon Asset Management S.A. | 26,618 | $365K | 0.1% | 2026-Q2 |
| BARCLAYS PLC trimmed | 21,704 | $297K | 0.1% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 21,000 | $288K | 0.1% | 2026-Q2 |
| IEQ CAPITAL, LLC added | 20,579 | $282K | 0.1% | 2026-Q2 |
| OSAIC HOLDINGS, INC. trimmed | 20,531 | $281K | 0.1% | 2026-Q2 |
| SATURNA CAPITAL CORP added | 20,275 | $278K | 0.1% | 2026-Q2 |
| Bridge City Capital, LLC trimmed | 20,223 | $277K | 0.1% | 2026-Q2 |
| Magnetar Financial LLC new | 20,108 | $275K | 0.1% | 2026-Q2 |
| Engineers Gate Manager LP added | 17,970 | $246K | 0.1% | 2026-Q2 |
| BALYASNY ASSET MANAGEMENT L.P. new | 17,932 | $246K | 0.1% | 2026-Q2 |
| Mariner, LLC added | 17,420 | $239K | 0.1% | 2026-Q2 |
| BOOTHBAY FUND MANAGEMENT, LLC new | 16,841 | $231K | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 14,935 | $205K | 0.1% | 2026-Q2 |
| Greenhaven Road Investment Management, L.P. trimmed | 12,947 | $177K | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. trimmed | 12,570 | $172K | 0.1% | 2026-Q2 |
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.