Board Changes

Smurfit Westrock plc (the “Company”) today filed a Form 8-K with the U.S. Securities and Exchange Commission (the “SEC”) disclosing that Terrell K. Crews and Lourdes Melgar both members of the Board of Directors (the “Board”), have notified the Company that they will be stepping down from the Board, effective as of the conclusion of the Company’s 2026 Annual General Meeting of Shareholders, which is currently scheduled for 1 May 2026. The Board and the Company thank Terrell and Lourdes for their service and their contributions to the Company during the formative period following the combination of Smurfit Kappa Group plc and WestRock Company.

Consequently, effective as of their board retirement, Terrell will be stepping down as Chair of the Audit Committee and as a member of the Finance Committee, and Lourdes will be stepping down as a member of the Audit and Sustainability Committees. Carole L. Brown will succeed Terrell as Chair of the Audit Committee, effective as of such time. Appropriate succession arrangements will be implemented within the relevant Board Committees. The Form 8-K is available to view on the SEC’s website at https://www.sec.gov and the Company’s website at https://investors.smurfitwestrock.com/financials/sec-filings/default.aspx