13F Insight
DOSSIER · 13F Holders · Q1 2026Financial Services · Finance ServicesMega-capCrowded
CMPO

COMPOSECURE INC

213 institutions still hold COMPOSECURE INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 20459V105·Finance Services·213 13F holders·last filed Mar 31, 2026
Market cap
—
▼ 6.9%
vs prior quarter
13F value held
$3.4B
79.0% inst. owned
of float
Holders
213
+110 QoQ
filers reporting
Activity
+54 / −98
+941 added · −860 reduced
this quarter
Concentration
26.22%
Platinum Equity Advisors, LLC/DE #1
top holder share
AI Holders Summary · Q1 2026

213 institutions reported CMPO in Q1 2026. Platinum Equity Advisors, LLC/DE leads at 26.2% of the visible book. +110 net new institutions vs prior quarter — accumulation reading.

Top holders

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

#HolderValueShares% port.Quarter
01
Platinum Equity Advisors, LLC/DE
CIK 0001803274
$903M52.8M10.17%Q1 202602
FMR LLC
CIK 0000315066
$676M39.6M0.04%Q1 202603
LOCUST WOOD CAPITAL ADVISERS, LLC
CIK 0001349434
$236M13.8M5.97%Q1 202604
BlackRock, Inc.
CIK 0002012383
$234M13.7M0.00%Q1 202605
Capital Research Global Investors
CIK 0001422848
$193M11.3M0.03%Q1 202606
CORSAIR CAPITAL MANAGEMENT, L.P.
CIK 0001276470
$145M8.5M21.51%Q1 202607
Vanguard Portfolio Management
CIK 0002100121
$141M8.3M0.01%Q1 202608
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$132M7.7M0.00%Q1 202609
BARROW HANLEY MEWHINNEY & STRAUSS LLC
CIK 0000313028
$96M5.6M0.31%Q1 202610
Alberta Investment Management Corp
CIK 0001463559· Sovereign
$92M5.4M0.55%Q1 202611
Capital World Investors
CIK 0001422849
$89M5.2M0.01%Q1 202612
Starboard Value LP
CIK 0001517137
$86M5.0M1.88%Q1 202613
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$71M4.2M0.00%Q1 202614
Bleichroeder LP
CIK 0001781002
$68M4.0M11.73%Q1 202615
STATE STREET CORP
CIK 0000093751
$67M3.9M0.00%Q1 202616
UBS Group AG
CIK 0001610520
$65M3.8M0.01%Q1 202617
Nine Ten Capital Management LLC
CIK 0001635236
$50M2.9M15.78%Q1 202618
JANUS HENDERSON GROUP PLC
CIK 0001274173
$36M2.1M0.02%Q1 202619
Clearbridge Investments, LLC
CIK 0001348883
$32M1.9M0.03%Q1 202620
MORGAN STANLEY
CIK 0000895421
$32M1.9M0.00%Q1 2026
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