GPK Investors Have Opportunity to Lead Graphic Packaging Holding Company Securities Fraud Lawsuit with the Schall Law Firm

LOS ANGELES, June 5, 2026 /PRNewswire/ -- The Schall Law Firm, a national shareholder rights litigation firm, reminds investors of a class action lawsuit against Graphic Packaging Holding Company ("Graphic Packaging" or "the Company") (NYSE: GPK) for violations of §§10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder by the U.S. Securities and Exchange Commission. Investors who purchased the Company's securities between February 4, 2025 and February 2, 2026, inclusive (the "Class Period"), are encouraged to contact the firm before July 6, 2026.