COMPOSECURE INC-A (CMPO) 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 June 30, 2026. The institutional investors covered on this page collectively reported approximately $4.32B 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 $837.35M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.33B, representing an estimated gain of +58.68% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 73% 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
192
Total Reported Value
$4.32B
Largest Holder
Platinum Equity Advisors, Llc/De
Largest Position
$837.35M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
64
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 | 9.35% | 52,829,757 | $837,351,648 | $1,328,668,389 | +$491,316,741 | +58.68% | |
| Fmr Llc | 0.03% | 42,747,045 | $677,540,665 | $1,075,088,182 | +$397,547,517 | +58.68% | |
| Alyeska Investment Group, L.P. | 0.95% | 23,404,836 | $370,966,651 | $588,631,625 | +$217,664,974 | +58.68% | |
| Locust Wood Capital Advisers, Llc | 5.72% | 14,907,488 | $236,283,682 | $374,923,323 | +$138,639,641 | +58.68% | |
| Blackrock, Inc. | 0.00% | 14,292,013 | $226,528,410 | $359,444,127 | +$132,915,717 | +58.68% | |
| Capital Research Global Investors | 0.03% | 11,550,580 | $183,076,693 | $290,497,087 | +$107,420,394 | +58.68% | |
| Cooperman Leon G | 5.09% | 11,384,508 | $180,444,452 | $286,320,376 | +$105,875,924 | +58.68% | |
| Barrow Hanley Mewhinney & Strauss Llc | 0.50% | 10,439,933 | $165,472,938 | $262,564,315 | +$97,091,377 | +58.68% | |
| Corsair Capital Management, L.P. | 16.99% | 8,517,859 | $135,008,065 | $214,224,154 | +$79,216,089 | +58.68% | |
| Vanguard Portfolio Management Llc | 0.01% | 8,367,535 | $132,625,430 | $210,443,505 | +$77,818,075 | +58.68% | |
| Vanguard Capital Management Llc | 0.00% | 7,775,110 | $123,235,494 | $195,544,017 | +$72,308,523 | +58.68% | |
| Alberta Investment Management Corp | 0.51% | 5,605,406 | $88,845,685 | $140,975,961 | +$52,130,276 | +58.68% | |
| Starboard Value Lp | 1.76% | 5,027,028 | $79,678,394 | $126,429,754 | +$46,751,360 | +58.68% | |
| Geode Capital Management, Llc | 0.00% | 4,542,126 | $72,006,611 | $114,234,469 | +$42,227,858 | +58.64% | |
| State Street Corp | 0.00% | 4,510,723 | $71,494,960 | $113,444,683 | +$41,949,723 | +58.68% | |
| Capital World Investors | 0.01% | 4,102,313 | $65,021,661 | $103,173,172 | +$38,151,511 | +58.68% | |
| Bleichroeder Lp | 11.26% | 3,972,176 | $62,958,985 | $99,900,226 | +$36,941,241 | +58.68% | |
| Nine Ten Capital Management Llc | 14.72% | 2,984,544 | $47,305,000 | $75,061,282 | +$27,756,282 | +58.68% | |
| Thrivent Financial For Lutherans | 0.07% | 2,776,377 | $44,006,000 | $69,825,882 | +$25,819,882 | +58.67% | |
| Bwcp, Lp | 5.31% | 2,343,475 | $37,144,079 | $58,938,396 | +$21,794,317 | +58.68% | |
| Janus Henderson Group Plc | 0.02% | 2,116,195 | $36,188,168 | $53,222,304 | +$17,034,136 | +47.07% | |
| Morgan Stanley | 0.00% | 2,209,053 | $35,013,498 | $55,557,683 | +$20,544,185 | +58.68% | |
| Chescapmanager Llc | 3.97% | 1,927,200 | $30,546,120 | $48,469,080 | +$17,922,960 | +58.68% | |
| Zuckerman Investment Group, Llc | 2.57% | 1,913,886 | $30,335,092 | $48,134,233 | +$17,799,141 | +58.68% | |
| Northern Trust Corp | 0.00% | 1,899,171 | $30,101,861 | $47,764,151 | +$17,662,290 | +58.68% | |
| Ubs Group Ag | 0.00% | 1,614,923 | $25,596,529 | $40,615,313 | +$15,018,784 | +58.68% | |
| Charles Schwab Investment Management Inc | 0.00% | 1,503,767 | $23,834,707 | $37,819,740 | +$13,985,033 | +58.68% | |
| Wellington Management Group Llp | 0.00% | 1,396,698 | $22,137,663 | $35,126,955 | +$12,989,292 | +58.68% | |
| Clearbridge Investments, Llc | 0.02% | 1,349,879 | $21,395,583 | $33,949,457 | +$12,553,874 | +58.68% | |
| Vanguard Fiduciary Trust Co | 0.00% | 1,285,049 | $20,368,027 | $32,318,982 | +$11,950,955 | +58.68% | |
| Tikvah Management Llc | 3.85% | 800,611 | $12,689,684 | $20,135,367 | +$7,445,683 | +58.68% | |
| Pillsbury Lake Capital Llc | 2.96% | 681,032 | $10,794,357 | $17,127,955 | +$6,333,598 | +58.68% | |
| Tidal Investments Llc | 0.03% | 674,636 | $10,692,981 | $16,967,095 | +$6,274,114 | +58.68% | |
| Bank Of New York Mellon Corp | 0.00% | 587,904 | $9,318,277 | $14,785,786 | +$5,467,509 | +58.68% | |
| Nuveen, Llc | 0.00% | 575,775 | $9,126,034 | $14,480,741 | +$5,354,707 | +58.68% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 426,555 | $7,294,090 | $10,727,858 | +$3,433,768 | +47.08% | |
| Catawba River Capital | 2.83% | 399,258 | $6,328,241 | $10,041,339 | +$3,713,098 | +58.68% | |
| Ballast Asset Management, Lp | 2.36% | 373,895 | $5,926,236 | $9,403,459 | +$3,477,223 | +58.68% | |
| Swiss National Bank | 0.00% | 349,000 | $5,531,650 | $8,777,350 | +$3,245,700 | +58.68% | |
| Jpmorgan Chase & Co | 0.00% | 318,571 | $5,079,112 | $8,012,061 | +$2,932,949 | +57.75% | |
| Russell Investments Group, Ltd. | 0.00% | 315,531 | $5,001,199 | $7,935,605 | +$2,934,406 | +58.67% | |
| Bard Associates Inc | 1.00% | 283,514 | $4,493,697 | $7,130,377 | +$2,636,680 | +58.68% | |
| Rice Hall James & Associates, Llc | 0.21% | 268,926 | $4,262,477 | $6,763,489 | +$2,501,012 | +58.68% | |
| Prelude Capital Management, Llc | 0.29% | 250,101 | $3,964,101 | $6,290,040 | +$2,325,939 | +58.68% | |
| First Manhattan Co. Llc. | 0.01% | 245,044 | $3,883,947 | $6,162,857 | +$2,278,910 | +58.68% | |
| Gabelli Funds Llc | 0.02% | 240,518 | $3,812,210 | $6,049,028 | +$2,236,818 | +58.68% | |
| Bank Of America Corp | 0.00% | 234,449 | $3,716,016 | $5,896,392 | +$2,180,376 | +58.68% | |
| Price T Rowe Associates Inc | 0.00% | 229,254 | $3,634,000 | $5,765,738 | +$2,131,738 | +58.66% | |
| Alliancebernstein L.P. | 0.00% | 206,216 | $3,526,294 | $5,186,332 | +$1,660,038 | +47.08% | |
| Rhumbline Advisers | 0.00% | 214,549 | $3,400,589 | $5,395,907 | +$1,995,318 | +58.68% |
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.