Notification Resignation of Directors and Appointment of New Directors Replacing the Resigned Directors.

Change of director/Executive Expired by rotation The date of board's resolution/submit : 30-Sep-2026 news Director Name : Mr. SUTHAT NUTPAN Position in company (1) : DIRECTOR Effective Date (1) : 15-Feb-2024 Expire Date (1) : 01-Oct-2026 Position in company (2) : Chairman of the Risk Management Committee, Member of the Executive and Investment Committee and Member of the Nomination and Remuneration Committee Expire Date (2) : 01-Oct-2026 Terminate Reason : Expired by rotation (term not expired) : Resigned from position /the company due to Mr. Suthat Nutpan, representative director of the Provincial Waterworks Authority, retires on September 30, 2026. ______________________________________________________________________ Change of director/Executive Expired by rotation Director Name : Mr. SARAYUT KAEWSIN Position in company (1) : DIRECTOR Effective Date (1) : 01-Aug-2024 Expire Date (1) : 01-Oct-2026 Position in company (2) : Member of the Corporate Governance and Sustainable Development Committee Expire Date (2) : 01-Oct-2026 Terminate Reason : Expired by rotation (term not expired) : Resigned from position /the company due to Mr. Sarayut Kaewsin, representative director of the Provincial Waterworks Authority, retires on September 30, 2026. ______________________________________________________________________ Change of director/Executive New election Director Name : MR. Pakit Paktham Position in company (1) : Director Effective Date (1) : 01-Oct-2026 Position in company (2) : Member of the Nomination and Remuneration Committee Effective Date (2) : 01-Oct-2026 ______________________________________________________________________ Change of director/Executive New election Director Name : MR. Witorn Ma-ied Position in company (1) : Director Effective Date (1) : 01-Oct-2026 Position in company (2) : Member of the Executive and Investment Committee and Member of the Corporate Governance and Sustainable Development Committee Effective Date (2) : 01-Oct-2026 ______________________________________________________________________ The company hereby certifies that the information above is correct and complete. Signature _________________ ( MS.Kanyanart Viraphandu ) Executive Vice President and Corporate Secretary Authorized person to disclose information ______________________________________________________________________ This announcement was prepared and disseminated by listed company or issuer through the electronic system which is provided for the purpose of dissemination of the information and related documents of listed company or issuer to the Stock Exchange of Thailand only. The Stock Exchange of Thailand has no responsibility for the correctness and completeness of any statements, figures, reports or opinions contained in this announcement, and has no liability for any losses and damages in any cases. In case you have any inquiries or clarification regarding this announcement, please directly contact listed company or issuer who made this announcement. If you would like to see the full details of this information, please click view "full details" in attached file.