PLATINUM EQUITY, LLC - 12 Jan 2026 SCHEDULE 13D Report for CompoSecure, Inc. Class A Common Stock, par value $0.0001 per share (CMPO)

Filing Manager
PLATINUM EQUITY, LLC
Reporting Manager
Platinum Equity, LLC
Security
CompoSecure, Inc. Class A Common Stock, par value $0.0001 per share
Symbol
CMPO
Shares outstanding
288,687,197 shares
Disclosed Ownership
52,829,757 shares
Ownership
18%
Form type
SCHEDULE 13D
Filing time
20 Jan 2026, 16:30:10 UTC
Date of event
12 Jan 2026
SEC
View on sec.gov

Reporting Managers (9)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Platinum Equity, LLC 18% 52,829,757 0 52,829,757 /s/ Mary Ann Sigler Mary Ann Sigler, Executive Vice President, Chief Financial Officer and Treasurer 0001228754
Platinum Equity Investment Holdings, LLC 18% 52,829,757 0 52,829,757 /s/ Mary Ann Sigler Mary Ann Sigler, Vice President, Secretary and Treasurer 0001634372
Platinum Equity Investment Holdings IC (Cayman), LLC 18% 52,829,757 0 52,829,757 /s/ Mary Ann Sigler Mary Ann Sigler, President 0001756330
Platinum Equity InvestCo, L.P. 18% 52,829,757 0 52,829,757 By: Platinum Equity Investment Holdings IC (Cayman), LLC, its general partner, /s/ Mary Ann Sigler Mary Ann Sigler, President 0001756331
Platinum Equity Investment Holdings IV, LLC 18% 52,829,757 0 52,829,757 /s/ Ty Renbarger Ty Renbarger, Vice President 0001756333
Platinum Equity Investment Holdings IV (Cayman), LLC 18% 52,829,757 0 52,829,757 /s/ Ty Renbarger Ty Renbarger, Vice President 0001785531
Platinum Equity Partners International IV (Cayman), L.P. 18% 52,829,757 0 52,829,757 By: Platinum Equity Investment Holdings IV (Cayman), LLC, its general partner, /s/ Ty Renbarger Ty Renbarger, Vice President 0001785528
PE Titan CS Holdings, L.P. 18% 52,829,757 0 52,829,757 By: Platinum Equity Partners International IV (Cayman), L.P., its GP, Platinum Equity Investment Holdings IV (Cayman), LLC, its GP, /s/ Ty Renbarger Ty Renbarger, Vice President 0002104295
Tom Gores 18% 52,829,757 0 52,829,757 /s/ Mary Ann Sigler Mary Ann Sigler, Attorney-in-Fact 0001471783