Multiple outlets report that law firms have announced the filing of a class action lawsuit involving GPGI, Inc., which is described as formerly known as CompoSecure, Inc. The notices state that the lawsuit is brought on behalf of purchasers or acquirers of GPGI (NYSE: GPGI) Class A common stock during a defined period. Both sources describe the “Class Period” as from November 3, 2025 through May 6, 2026, inclusive. One release from Robbins LLP reminds stockholders of the class action and identifies it as filed on behalf of all investors who purchased or otherwise acquired the company’s Class A common stock during that timeframe. Another PR Newswire release from Robbins Geller Rudman & Dowd LLP states that it has filed the class action and provides an option for investors with substantial losses to lead the lawsuit. The release also indicates a deadline for investors to take action, with an identified cutoff in September 2026. The notices are framed as investor alerts and do not provide substantive allegations or case details in the excerpts provided.