GPK Shareholder Alert: Investors With Losses May Seek to Lead the Class Action in Graphic Packaging Holding Company Securities Lawsuit - Contact The Gross Law Firm

NEW YORK, June 05, 2026 (GLOBE NEWSWIRE) -- The Gross Law Firm issues the following notice to shareholders of Graphic Packaging Holding Company (NYSE: GPK). Shareholders who purchased shares of GPK during the class period listed are encouraged to contact the firm regarding possible lead plaintiff appointment.