Material Event Form 8 K

On November 4, 2024, International Paper Company (the "Company") published a supplementary prospectus prepared in accordance with the Prospectus Regulation Rules of the U.K. Financial Conduct Authority (the "FCA") made under Section 73A of the U.K. Financial Services and Markets Act 2000, as amended (the "Supplementary Prospectus"). The Supplementary Prospectus is supplemental to, and should be read in conjunction with, the prospectus previously published by the Company on September 11, 2024 (the "Original Prospectus", and together with the Supplementary Prospectus, the "U.K. Prospectus"). The U.K. Prospectus relates to the admission of shares of common stock of the Company, par value $1.00 per share (the "Company Common Stock"), to the equity shares (international commercial companies secondary listing) category of the Official List of the FCA and to trading on the main market for listed securities of the London Stock Exchange in connection with the previously disclosed terms of a recommended offer by the Company to acquire the issued and to be issued share capital of DS Smith Plc, a public limited company incorporated in England and Wales in an all stock transaction (the "Acquisition"). The shareholders of the Company voted to approve the proposed issuance of new shares of Company Common Stock to the shareholders of DS Smith in connection with the Acquisition on October 11, 2024.