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 118 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	$41.90M 3,634,401 shares	0.00%	—	SEC filing ↗ Nov 13, 2024	▾
02	Harvey Partners, LLC CIK 1406484 · View history	$17.47M 1,515,000 shares	2.01%	+115.00K(+8.20%)Added	SEC filing ↗ Nov 14, 2024	▾
03	Azarias Capital Management, L.P. CIK 1625279 · View history	$16.58M 1,438,259 shares	7.37%	+165.07K(+13.00%)Added	SEC filing ↗ Nov 4, 2024	▾
04	NEEDHAM INVESTMENT MANAGEMENT LLC CIK 1167212 · View history	$16.37M 1,420,000 shares	1.26%	+395.00K(+38.50%)Added	SEC filing ↗ Nov 14, 2024	▾
05	VANGUARD GROUP INC CIK 102909 · View history	$16.09M 1,395,125 shares	0.00%	+23.32K(+1.70%)Added	SEC filing ↗ Nov 13, 2024	▾
06	FIRST WILSHIRE SECURITIES MANAGEMENT INC CIK 732847 · View history	$15.79M 1,369,407 shares	4.44%	-545.36K(-28.50%)Reduced	SEC filing ↗ Nov 14, 2024	▾
07	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$13.33M 1,156,147 shares	0.00%	-16.47K(-1.40%)Reduced	SEC filing ↗ Nov 7, 2024	▾
08	WESTERLY CAPITAL MANAGEMENT, LLC CIK 1546172 · View history	$12.68M 1,100,000 shares	7.20%	+20.00K(+1.90%)Added	SEC filing ↗ Nov 14, 2024	▾
09	ROYCE & ASSOCIATES LP CIK 906304 · View history	$9.95M 863,262 shares	0.09%	+107.82K(+14.30%)Added	SEC filing ↗ Nov 6, 2024	▾
10	ACK Asset Management LLC CIK 1510940 · View history	$9.24M 801,000 shares	1.14%	+801.00KNew	SEC filing ↗ Nov 13, 2024	▾
11	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$6.90M 598,103 shares	0.00%	+4.71K(+0.80%)Added	SEC filing ↗ Nov 12, 2024	▾
12	GENDELL JEFFREY L CIK 1056581 · View history	$6.88M 597,118 shares	0.22%	-339.48K(-36.20%)Reduced	SEC filing ↗ Nov 14, 2024	▾
13	Portolan Capital Management, LLC CIK 1350290 · View history	$5.87M 509,059 shares	0.43%	+129.99K(+34.30%)Added	SEC filing ↗ Nov 14, 2024	▾
14	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$4.76M 413,023 shares	0.00%	+103.94K(+33.60%)Added	SEC filing ↗ Nov 14, 2024	▾
15	STATE STREET CORP CIK 93751 · View history	$4.43M 384,173 shares	0.00%	+55.69K(+17.00%)Added	SEC filing ↗ Nov 14, 2024	▾
16	Stanley-Laman Group, Ltd. CIK 1601489 · View history	$3.87M 335,444 shares	0.54%	+8.82K(+2.70%)Added	SEC filing ↗ Oct 22, 2024	▾
17	FRANKLIN RESOURCES INC CIK 38777 · Amended · View history	$2.82M 247,461 shares	0.00%	-96.02K(-28.00%)Reduced	SEC filing ↗ Nov 27, 2024	▾
18	ESSEX INVESTMENT MANAGEMENT CO LLC CIK 201772 · View history	$2.74M 238,056 shares	0.48%	+635(+0.30%)Added	SEC filing ↗ Oct 10, 2024	▾
19	NORTHERN TRUST CORP CIK 73124 · View history	$2.74M 237,542 shares	0.00%	+144.75K(+156.00%)Added	SEC filing ↗ Nov 13, 2024	▾
20	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$2.47M 214,006 shares	0.00%	-70.95K(-24.90%)Reduced	SEC filing ↗ Nov 14, 2024	▾

Showing 20 / 118 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

118

Cancelled or null records excluded

Disclosed shares

23,281,982

Not deduplicated across managers

Disclosed value

$268.34M

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 · Q3 2024

Explore all 118 reporting institutions.

This page includes 20 of 118 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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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.