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New York, New York--(Newsfile Corp. - September 4, 2026) - WHY: Rosen Law Firm, a global investor rights law firm, reminds purchasers of Class A common stock of GPGI, Inc. f/k/a CompoSecure, Inc. (NYSE: GPGI) (NYSE: CMPO) between November 3, 2025 and May 6, 2026, inclusive (the "Class Period"), of the important September 14, 2026 lead plaintiff deadline. SO WHAT: If you purchased GPGI Class A common stock during the Class Period you may be entitled to compensation without payment of any out of pocket fees or costs through a contingency fee arrangement.

NEW YORK, Sept. 4, 2026 /PRNewswire/ -- Why: Rosen Law Firm, a global investor rights law firm, reminds purchasers of Class A common stock of GPGI, Inc. f/k/a CompoSecure, Inc. (NYSE: GPGI, CMPO) between November 3, 2025 and May 6, 2026, inclusive (the "Class Period"), of the important September 14, 2026 lead plaintiff deadline.

San Diego, California--(Newsfile Corp. - September 4, 2026) - Robbins LLP reminds investors that a securities class action has been filed on behalf of all persons and entities who purchased or otherwise acquired GPGI, Inc. (NYSE: GPGI) Class A common stock between November 3, 2025 and May 6, 2026, inclusive (the "Class Period"). The lawsuit alleges that GPGI, Inc., formerly known as CompoSecure, Inc. (CMPO), misled investors about the value, financial prospects, and anticipated benefits of its acquisition of Husky Technologies Limited ("Husky").

New York, New York--(Newsfile Corp. - September 4, 2026) - Kaplan Fox & Kilsheimer LLP announces that a class action lawsuit has been filed against GPGI, Inc. f/k/a CompoSecure, Inc. (NYSE: GPGI) (NYSE: CMPO) on behalf of investors that purchased or otherwise acquired GPGI Class A common stock between November 3, 2025 and May 6, 2026 (the "Class Period"). CLICK HERE TO JOIN THE CASE If you are an investor in GPGI and have suffered losses, you may CLICK HERE to contact us.

Boston, Massachusetts--(Newsfile Corp. - September 4, 2026) - Block & Leviton reminds investors that a securities fraud lawsuit has been filed against GPGI, Inc. (NYSE: GPGI) and certain of its executives. Investors who have lost money in their GPGI, Inc. investment should contact the firm to learn more about how they might recover those losses.

NEW YORK, Sept. 04, 2026 (GLOBE NEWSWIRE) -- Kaplan Fox & Kilsheimer LLP announces that a class action lawsuit has been filed against GPGI, Inc. f/k/a CompoSecure, Inc. (NYSE: GPGI) (NYSE: CMPO) on behalf of investors that purchased or otherwise acquired GPGI Class A common stock between November 3, 2025 and May 6, 2026 (the “Class Period”).

SAN DIEGO, Sept. 4, 2026 /PRNewswire/ -- The law firm of Robbins Geller Rudman & Dowd LLP  announces that purchasers of GPGI, Inc. f/k/a CompoSecure, Inc. (NYSE: GPGI; CMPO) Class A common stock between November 3, 2025 and May 6, 2026, both dates inclusive (the "Class Period"), have until Monday, September 14, 2026 to seek appointment as lead plaintiff of the GPGI class action lawsuit.