Annual Financial Report

2 March 2026

Filing of the International Paper CompanyAnnual Report on Form 10-K for the Year Ended 31 December 2025

The Annual Report on Form 10-K for the fiscal year ended 31 December 2025 (the "2025 Annual Report") has been published by International Paper Company and was filed with the U.S. Securities and Exchange Commission (the "SEC") on 27 February 2026. The 2025 Annual Report is available to view on the Company's website at: Financial Reports | International Paper

The person responsible for arranging for the release of this announcement on behalf of International Paper Company is Joseph R. Saab, Senior Vice President, General Counsel and Corporate Secretary.

About International Paper

International Paper (NYSE: IP; LSE: IPC) is dedicated to empowering customers, teammates, and shareowners to thrive by delivering innovative, sustainable packaging solutions for a changing world. As a trusted leader in corrugated packaging, we collaborate with partners across industries to protect what matters most - strengthening supply chains, advancing sustainability, and creating lasting value for our stakeholders. Discover more at internationalpaper.com.

For further information please contact:

Media: [email protected]

Investors: Mandi Gilliland; +1-901-419-4595; Michele Vargas, +1-901-419-7287