Bronstein, Gewirtz & Grossman LLC Urges Graphic Packaging Holding Company Investors to Act: Class Action Filed Alleging Investor Harm

NEW YORK, June 02, 2026 (GLOBE NEWSWIRE) -- Bronstein, Gewirtz & Grossman, LLC, a nationally recognized investor-rights law firm, announces that a class action lawsuit has been filed against Graphic Packaging Holding Company (NYSE: GPK) and certain of its officers. This lawsuit seeks to recover damages against Defendants for alleged violations of the federal securities laws on behalf of all persons and entities that purchased or otherwise acquired Graphic Packaging securities between February 4, 2025 and February 2, 2026, both dates inclusive (the “Class Period”).