CompoSecure, Inc. — Director's Dealing 2026

Jan 20, 2026

SEC Form 3 — Initial Statement of Beneficial Ownership

Issuer: CompoSecure, Inc. (CMPO)
CIK: 0001823144
Period of Report: 2026-01-12

Reporting Person: PLATINUM EQUITY, LLC (10% Owner)
Reporting Person: Platinum Equity Investment Holdings, LLC (10% Owner)
Reporting Person: Platinum Equity Investment Holdings IC (Cayman), LLC (10% Owner)
Reporting Person: Platinum Equity InvestCo, L.P. (10% Owner)
Reporting Person: Platinum Equity Investment Holdings IV, LLC (10% Owner)
Reporting Person: Platinum Equity Investment Holdings IV (Cayman), LLC (10% Owner)
Reporting Person: Platinum Equity Partners International IV (Cayman), L.P. (10% Owner)
Reporting Person: PE Titan CS Holdings, L.P. (10% Owner)
Reporting Person: Gores Tom (10% Owner)

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	52829757	Indirect

Footnotes

F1: PE Titan CS Holdings, L.P. (the "Platinum Stockholder") is the record holder of the securities reported herein. Tom Gores is the manager of Platinum Equity, LLC, which is the sole member of Platinum Equity Investment Holdings, LLC, which is the sole member of Platinum Equity Investment Holdings IC (Cayman), LLC, which is the general partner of Platinum Equity InvestCo, L.P., which is the sole member of Platinum Equity Investment Holdings IV, LLC, which is the sole member of Platinum Equity Investment Holdings IV (Cayman), LLC, which is the general partner of Platinum Equity Partners International IV (Cayman), L.P., which is the general partner of the Platinum Stockholder. By virtue of these relationships, each of these entities and Mr. Gores may be deemed to share beneficial ownership of the securities held of record by the Platinum Stockholder.