GPK: Other company developments

Item 8.01 Other Events. On September 28, 2026, representatives of Graphic Packaging Holding Company will meet with investors and expect to refer to the information in the Fall 2026 Corporate Governance and Stewardship presentation attached to this Current Report on Form 8-K as Exhibit 99.1 Item 9.01 Financial Statements and Exhibits. Exhibit Number Description 99.1 Corporate Governance and Stewardship Presentation 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Date: September 28, 2026 By: /s/ Daniel S. Fishbein Daniel S. Fishbein Executive Vice President, General Counsel and Secretary