13F Insight
DOSSIER · 13F Holders · Q1 2026Most-boughtAI cap-ex
MTRX

MATRIX SVC CO

149 institutions still hold MATRIX SVC CO as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 576853105·149 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 1.5%
vs prior quarter
13F value held
$184M
76.0% inst. owned
of float
Holders
149
+124 QoQ
filers reporting
Activity
+68 / −78
+945 added · −772 reduced
this quarter
Concentration
12.56%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

149 institutions reported MTRX in Q1 2026. BlackRock, Inc. leads at 12.6% of the visible book. +124 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$23M2.0M0.00%Q1 202602
NEEDHAM INVESTMENT MANAGEMENT LLC
CIK 0001167212
$17M1.4M1.06%Q4 202503
GENDELL JEFFREY L
CIK 0001056581
$14M1.2M0.19%Q1 202604
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$14M1.2M0.00%Q1 202605
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$11M982K0.01%Q1 202606
WESTERLY CAPITAL MANAGEMENT, LLC
CIK 0001546172
$11M965K3.01%Q1 202607
Harvey Partners, LLC
CIK 0001406484
$10M853K0.88%Q4 202508
First Eagle Investment Management, LLC
CIK 0001325447
$10M851K0.02%Q1 202609
Azarias Capital Management, L.P.
CIK 0001625279
$9M817K4.20%Q1 202610
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$8M685K0.00%Q1 202611
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$8M664K0.00%Q1 202612
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$7M638K0.01%Q1 202613
STATE STREET CORP
CIK 0000093751
$6M545K0.00%Q1 202614
FIRST WILSHIRE SECURITIES MANAGEMENT INC
CIK 0000732847
$6M523K1.35%Q1 202615
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$6M499K0.00%Q1 202616
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
$5M476K0.00%Q1 202617
Bank of New York Mellon Corp
CIK 0001390777
$5M467K0.00%Q1 202618
CenterBook Partners LP
CIK 0001872738
$5M431K0.27%Q1 202619
Connor, Clark & Lunn Investment Management Ltd.
CIK 0001596800
$4M363K0.01%Q1 202620
Russell Investments Group, Ltd.
CIK 0001692234
$4M357K0.00%Q1 2026
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