Total Voting Rights

RNS Number : 5295G Smurfit Westrock PLC 01 June 2026 Smurfit Westrock plc ('Smurfit Westrock') DUBLIN (01 June 2026) In accordance with DTR 5.6.1 of the UK's Financial Conduct Authority's Disclosure Guidance and Transparency Rules, Smurfit Westrock announces that: As of 31 May 2026, Smurfit Westrock's issued share capital consists of 524,514,988 Ordinary Shares of nominal value $0.001 each. Smurfit Westrock does not hold any Ordinary Shares in treasury. Therefore, the total number of voting rights in Smurfit Westrock is 524,514,988. The above figure may be used by shareholders as a denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Smurfit Westrock under the UK's Financial Conduct Authority's Disclosure Guidance and Transparency Rules. 01 June 2026 CONTACT: Niall Keane Company Secretary +353 (0)1 202 7000 This information is provided by RNS, the news service of the London Stock Exchange. RNS is approved by the Financial Conduct Authority to act as a Primary Information Provider in the United Kingdom. Terms and conditions relating to the use and distribution of this information may apply. For further information, please contact [email protected] or visit www.rns.com. RNS may use your IP address to confirm compliance with the terms and conditions, to analyse how you engage with the information contained in this communication, and to share such analysis on an anonymised basis with others as part of our commercial services. For further information about how RNS and the London Stock Exchange use the personal data you provide us, please see our Privacy Policy. END TVREASKFEDEKEFA