Company · Ownership research

MATRIX SERVICE CO MTRX

CIK 0000866273 · CUSIP 576853105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 576853105 (MTRX), not CUSIP 576853955 (MTRX), CUSIP 576853905 (MTRX), CUSIP M6859E153 (MTRX), and does not merge CUSIPs.

This page lists the top 20 of 150 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$29.31M 2,139,456 shares	0.00%	+125.24K(+6.20%)Added	SEC filing ↗ Aug 7, 2026	▾
02	NEEDHAM INVESTMENT MANAGEMENT LLC CIK 1167212 · View history	$19.66M 1,435,000 shares	0.59%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2026	▾
03	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$16.53M 1,206,822 shares	0.01%	+225.18K(+22.90%)Added	SEC filing ↗ Aug 12, 2026	▾
04	GENDELL JEFFREY L CIK 1056581 · View history	$16.34M 1,192,529 shares	0.15%	-38.78K(-3.10%)Reduced	SEC filing ↗ Aug 14, 2026	▾
05	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · View history	$16.28M 1,188,393 shares	0.00%	-8.39K(-0.70%)Reduced	SEC filing ↗ Aug 13, 2026	▾
06	First Eagle Investment Management, LLC CIK 1325447 · Amended · View history	$13.57M 990,217 shares	0.02%	+139.41K(+16.40%)Added	SEC filing ↗ Aug 24, 2026	▾
07	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$11.93M 871,501 shares	0.01%	+395.41K(+83.10%)Added	SEC filing ↗ Aug 13, 2026	▾
08	Harvey Partners, LLC CIK 1406484 · View history	$11.17M 815,023 shares	0.77%	-89.98K(-9.90%)Reduced	SEC filing ↗ Aug 14, 2026	▾
09	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$10.25M 748,118 shares	0.01%	+110.43K(+17.30%)Added	SEC filing ↗ Aug 14, 2026	▾
10	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$9.89M 721,322 shares	0.00%	+35.95K(+5.20%)Added	SEC filing ↗ Aug 12, 2026	▾
11	Azarias Capital Management, L.P. CIK 1625279 · View history	$9.23M 673,692 shares	4.02%	-143.33K(-17.50%)Reduced	SEC filing ↗ Jul 13, 2026	▾
12	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$9.11M 665,266 shares	0.00%	+1.33K(+0.20%)Added	SEC filing ↗ Aug 11, 2026	▾
13	WESTERLY CAPITAL MANAGEMENT, LLC CIK 1546172 · View history	$8.16M 595,930 shares	1.51%	-369.07K(-38.20%)Reduced	SEC filing ↗ Aug 14, 2026	▾
14	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$8.14M 594,197 shares	0.00%	+95.26K(+19.10%)Added	SEC filing ↗ Aug 14, 2026	▾
15	STATE STREET CORP CIK 93751 · Amended · View history	$7.96M 581,006 shares	0.00%	+35.52K(+6.50%)Added	SEC filing ↗ Sep 22, 2026	▾
16	FIRST WILSHIRE SECURITIES MANAGEMENT INC CIK 732847 · View history	$7.08M 517,121 shares	1.46%	-5.72K(-1.10%)Reduced	SEC filing ↗ Aug 14, 2026	▾
17	JPMORGAN CHASE & CO CIK 19617 · View history	$6.31M 460,466 shares	0.00%	+185.16K(+67.30%)Added	SEC filing ↗ Aug 12, 2026	▾
18	Bank of New York Mellon Corp CIK 1390777 · View history	$6.27M 457,365 shares	0.00%	-9.53K(-2.00%)Reduced	SEC filing ↗ Aug 6, 2026	▾
19	MORGAN STANLEY CIK 895421 · View history	$5.99M 437,019 shares	0.00%	+134.32K(+44.40%)Added	SEC filing ↗ Aug 13, 2026	▾
20	CITADEL ADVISORS LLC CIK 1423053 · Amended · View history	$5.84M 426,023 shares	0.00%	-46.02K(-9.70%)Reduced	SEC filing ↗ Sep 2, 2026	▾

Showing 20 / 150 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

150

Cancelled or null records excluded

Disclosed shares

24,924,672

Not deduplicated across managers

Disclosed value

$341.09M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

MATRIX SERVICE CO · Q2 2026

Explore all 150 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.