Item 8.01 Other Events. On November 3, 2025, CompoSecure, Inc. (the “ Company”) called for redemption all of its issued and outstanding Public Warrants (as defined in the Warrant Agreement) to purchase shares of the Company’s Class A common stock, par value $0.0001 per share (the “ Common Stock”), that were issued under the Warrant Agreement, dated as of November 20, 2020, by and between the Company and Continental Stock Transfer & Trust Company, as warrant agent (the “ Warrant Agreement”), and which trade separately on the Nasdaq Global Market under the symbol CMPOW (the “ Warrants”). The redemption date for the Warrants is December 3, 2025. Holders of Warrants may exercise their Warrants at any time prior to 5:00 p. m. New York City time on December 3, 2025 (the “ Redemption Date”). The Company’s board of directors has elected to require that all Warrants be exercised only on a cashless basis in accordance with the procedures set forth in the Notice of Redemption. If any Warrants are not exercised before the Redemption Date, those Warrants will be canceled and holders of those Warrants will be paid $0.01 per Warrant and will no longer have the right to purchase any shares of Common Stock underlying those Warrants. A copy of the Notice of Redemption announcing the calling for redemption of the Warrants is attached as Exhibit 99.1 to this Form 8-K and is incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits (d) Exhibits Exhibit No. Exhibit Description 99.1 Notice of Redemption, dated November 3, 2025 ──────────────────────────────────────────────────────────────────────────────────────────────── 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURE