COMPOSECURE INC-A (CMPO) Top Institutional Shareholders
COMPOSECURE INC-A (CMPO) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $4.20B in CMPO holdings during the latest filing period.
Platinum Equity Advisors, Llc/De is currently the largest disclosed institutional shareholder of CMPO tracked by InsiderSet, reporting ownership valued at approximately $903.39M in its March 31, 2026 SEC Form 13F filing.
The top 10 institutional shareholders tracked on this page collectively account for approximately 74% of the total disclosed CMPO value among the investors covered in this analysis. Major shareholders include Platinum Equity Advisors, Llc/De, Fmr Llc, Alyeska Investment Group, L.P., and several other long-term asset managers with concentrated positions in COMPOSECURE INC-A (CMPO).
This page ranks the largest institutional CMPO shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
199
Total Reported Value
$4.20B
Largest Holder
Platinum Equity Advisors, Llc/De
Largest Position
$903.39M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
168
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Platinum Equity Advisors, Llc/De | 10.17% | 52,829,757 | $903,388,845 | — | — | — | |
| Fmr Llc | 0.04% | 39,551,933 | $676,338,044 | — | — | — | |
| Alyeska Investment Group, L.P. | 1.04% | 21,395,253 | $365,858,827 | — | — | — | |
| Locust Wood Capital Advisers, Llc | 6.42% | 13,696,778 | $234,214,909 | — | — | — | |
| Blackrock, Inc. | 0.00% | 13,677,162 | $233,879,469 | — | — | — | |
| Capital Research Global Investors | 0.03% | 11,260,713 | $192,558,192 | — | — | — | |
| Corsair Capital Management, L.P. | 21.51% | 8,465,789 | $144,764,992 | — | — | — | |
| Vanguard Portfolio Management Llc | 0.01% | 8,270,457 | $141,424,815 | — | — | — | |
| Vanguard Capital Management Llc | 0.00% | 7,720,738 | $132,024,620 | — | — | — | |
| Barrow Hanley Mewhinney & Strauss Llc | 0.31% | 5,601,505 | $95,785,736 | — | — | — | |
| Alberta Investment Management Corp | 0.57% | 5,405,406 | $92,432,443 | — | — | — | |
| Capital World Investors | 0.01% | 5,188,038 | $88,715,450 | — | — | — | |
| Starboard Value Lp | 1.88% | 5,027,028 | $85,962,179 | — | — | — | |
| Geode Capital Management, Llc | 0.00% | 4,177,756 | $71,454,281 | — | — | — | |
| Bleichroeder Lp | 11.73% | 3,969,676 | $67,881,454 | — | — | — | |
| State Street Corp | 0.00% | 3,936,536 | $67,314,766 | — | — | — | |
| Ubs Group Ag | 0.01% | 3,824,216 | $65,394,094 | — | — | — | |
| Nine Ten Capital Management Llc | 15.78% | 2,904,544 | $49,668,000 | — | — | — | |
| Janus Henderson Group Plc | 0.02% | 2,116,195 | $36,188,168 | — | — | — | |
| Clearbridge Investments, Llc | 0.03% | 1,891,738 | $32,348,715 | — | — | — | |
| Morgan Stanley | 0.00% | 1,880,334 | $32,153,726 | — | — | — | |
| Northern Trust Corp | 0.00% | 1,810,522 | $30,959,928 | — | — | — | |
| Zuckerman Investment Group, Llc | 2.55% | 1,588,722 | $27,167,140 | — | — | — | |
| Charles Schwab Investment Management Inc | 0.00% | 1,473,259 | $25,192,729 | — | — | — | |
| Bank Of America Corp | 0.00% | 1,285,009 | $21,973,654 | — | — | — | |
| Vanguard Fiduciary Trust Co | 0.01% | 1,232,026 | $21,067,645 | — | — | — | |
| Chescapmanager Llc | 2.91% | 1,064,811 | $18,208,268 | — | — | — | |
| Bwcp, Lp | 2.76% | 1,059,839 | $18,123,247 | — | — | — | |
| Tikvah Management Llc | 5.35% | 1,009,181 | $17,256,995 | — | — | — | |
| Alti Global, Inc. | 0.30% | 807,557 | $13,809,225 | — | — | — | |
| Tidal Investments Llc | 0.04% | 676,454 | $11,567,363 | — | — | — | |
| Wellington Management Group Llp | 0.00% | 561,418 | $9,600,248 | — | — | — | |
| Bank Of New York Mellon Corp | 0.00% | 503,730 | $8,613,780 | — | — | — | |
| Goldman Sachs Group Inc | 0.00% | 458,333 | $7,837,494 | — | — | — | |
| Nuveen, Llc | 0.00% | 436,898 | $7,470,956 | — | — | — | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 426,555 | $7,294,090 | — | — | — | |
| Catawba River Capital | 3.18% | 386,718 | $6,605,144 | — | — | — | |
| Swiss National Bank | 0.00% | 368,600 | $6,303,060 | — | — | — | |
| Russell Investments Group, Ltd. | 0.01% | 358,598 | $6,132,032 | — | — | — | |
| Ballast Asset Management, Lp | 2.21% | 290,423 | $4,966,233 | — | — | — | |
| Bard Associates Inc | 1.22% | 285,113 | $4,875,433 | — | — | — | |
| First Manhattan Co. Llc. | 0.01% | 270,512 | $4,625,755 | — | — | — | |
| Rice Hall James & Associates, Llc | 0.24% | 255,395 | $4,367,255 | — | — | — | |
| Prospect Capital Advisors, Llc | 2.28% | 240,310 | $4,109,301 | — | — | — | |
| Cannell Capital Llc | 2.64% | 238,175 | $4,072,792 | — | — | — | |
| Alliancebernstein L.P. | 0.00% | 206,984 | $3,990,652 | — | — | — | |
| Archon Partners Llc | 0.47% | 230,000 | $3,933,000 | — | — | — | |
| California State Teachers Retirement System | 0.00% | 219,467 | $3,752,886 | — | — | — | |
| Sei Investments Co | 0.00% | 193,178 | $3,303,337 | — | — | — | |
| Rhumbline Advisers | 0.00% | 184,785 | $3,159,812 | — | — | — |
Frequently asked questions about CMPO
Who owns the most CMPO stock?
The largest holders of CMPO are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for COMPOSECURE INC-A (CMPO).
Is CMPO widely held by superinvestors?
Many widely followed stocks like CMPO appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly CMPO is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.