PLATINUM EQUITY, LLC - 12 Jan 2026 Form 3 Insider Report for CompoSecure, Inc. (CMPO)

Role
10%+ Owner
Signature
Platinum Equity, LLC, By: /s/ Mary Ann Sigler, Executive Vice President, Chief Financial Officer and Treasurer
Issuer symbol
CMPO
Transactions as of
12 Jan 2026
Net transactions value
$0
Form type
3
Filing time
20 Jan 2026, 16:30:34 UTC
Previous filing
23 Jul 2025
Next filing
11 Mar 2026
SEC
View on sec.gov

Reporting Owners (9)

Name Relationship Address Signature Signature date CIK
PLATINUM EQUITY, LLC 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS Platinum Equity, LLC, By: /s/ Mary Ann Sigler, Executive Vice President, Chief Financial Officer and Treasurer 20 Jan 2026 0001228754
Platinum Equity Investment Holdings, LLC 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS Platinum Equity Investment Holdings, LLC, By: /s/ Mary Ann Sigler, Vice President, Secretary and Treasurer 20 Jan 2026 0001634372
Platinum Equity Investment Holdings IC (Cayman), LLC 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS Platinum Equity Investment Holdings IC (Cayman), LLC, By: /s/ Mary Ann Sigler, President 20 Jan 2026 0001756330
Platinum Equity InvestCo, L.P. 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS Platinum Equity InvestCo, L.P., By: Platinum Equity Investment Holdings IC (Cayman), LLC, its general partner, By: /s/ Mary Ann Sigler, President 20 Jan 2026 0001756331
Platinum Equity Investment Holdings IV, LLC 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS Platinum Equity Investment Holdings IV, LLC, By: /s/ Ty Renbarger, Vice President 20 Jan 2026 0001756333
Platinum Equity Investment Holdings IV (Cayman), LLC 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS Platinum Equity Investment Holdings IV (Cayman), LLC, By: /s/ Ty Renbarger, Vice President 20 Jan 2026 0001785531
Platinum Equity Partners International IV (Cayman), L.P. 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS Platinum Equity Partners International IV (Cayman), L.P., By: Platinum Equity Investment Holdings IV (Cayman), LLC, its general partner, By: /s/ Ty Renbarger, Vice President 20 Jan 2026 0001785528
PE Titan CS Holdings, L.P. 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS PE Titan CS Holdings, L.P., By: Platinum Equity Partners International IV (Cayman), L.P., its GP, By Platinum Equity Investment Holdings IV (Cayman), LLC, its GP, By: /s/ Ty Renbarger, Vice President 20 Jan 2026 0002104295
Gores Tom 10%+ Owner C/O PLATINUM EQUITY ADVISORS, LLC, 360 NORTH CRESCENT DRIVE, SOUTH BUILDING, BEVERLY HILLS Tom Gores, By: /s/ Mary Ann Sigler, Attorney-in-Fact 20 Jan 2026 0001471783

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding CMPO Class A Common Stock 52,829,757 12 Jan 2026 See footnote F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.

Remarks:

Exhibit 24 - Power of Attorney.