GPK: Leadership change

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. Effective June 11, 2026, following the Annual Meeting of Stockholders, Mr. Philip R. Martens retired from his positions as a member and Chairman of the Board of Directors (the “Board”) of Graphic Packaging Holding Company (the “Company”). Mr. Larry M. Venturelli, a member of the Board since 2016, was elected Chairman of the Board, effective upon Mr. Martens retirement. A press release announcing Mr. Martens’ retirement and Mr. Venturelli’s election as Chairman of the Board is attached hereto as Exhibit 99.1. Item 9.01. Financial Statements and Exhibits. Exhibit No. Description 99.1 Press Release dated June 11, 2026 announcing Mr. Philip R. Martens’ retirement and Mr. Larry M. Venturelli’s election as Chairman of the Board. 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. By: /s/ Daniel S. Fishbein Daniel S. Fishbein Executive Vice President, General Counsel and Secretary Date: June 11, 2026