CompoSecure Inc

Rule 10b5-1 Trading Plans.

During the quarter ended June 30, 2024, the following officers of the Company entered into and/or terminated trading plans intended to satisfy the affirmative defense conditions of Rule 10b5-1(c):

•On May 17, 2024, Timothy Fitzsimmons, the Chief Financial Officer of the Company, terminated his pre-existing trading plan (adopted May 24, 2023). This plan would have covered the sale of 469,000 shares of the Company’s Class A common stock, all of which would have been acquired upon exercise of stock options. Mr. Fitzsimmons' stock options were exercised in May 2024 through a net settlement transaction with the Company.

•On June 13, 2024, Adam Lowe, Chief Product & Innovation Officer of the Company, entered into a plan covering the potential sale of 338,923 shares of Common Stock, all of which would be acquired upon exercise of stock options. This plan is scheduled to terminate on the earlier of June 13, 2025 or the date all shares subject to the plan have been sold.

•On June 14, 2024, Amanda Gourbault, Chief Revenue Officer of the Company, entered into a plan covering the possible sale of 16,000 shares of Common Stock. This plan is scheduled to terminate on the earlier of December 31, 2024 or the date all shares subject to the plan have been sold.

Transactions under each of these plans are based upon pre-established stock price thresholds and will only occur upon the expiration of the applicable mandatory cooling-off period.

Other than the plans described above, during the quarter ended June 30, 2024, none of the Company’s directors or officers informed the Company of theadoption ortermination of a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as those terms are defined in Regulation S-K, Item 408.