Schedule of Shareholders' meeting Subject : Schedule of Extra-General Meeting of Shareholders Date of Board resolution : 28-Oct-2026 Shareholder's meeting date : 03-Dec-2026 Beginning time of meeting (hh:mm) : 09 : 00 Record date for the right to attend the : 11-Nov-2026 meeting Ex-meeting date : 10-Nov-2026 Type of meeting : Electronic meeting Venue of the meeting : Electronic meeting Agenda Item : 1 Agenda Detail : To consider and approve SCG Chemicals Public Company Limited's entry into the transaction for the combination of the olefins and polyolefins businesses in Thailand through the amalgamation of subsidiaries of SCG Chemicals Public Company Limited and subsidiaries of PTT Global Chemical Public Company Limited, including the authorization of the Board of Directors and/or persons authorized by the Board of Directors to undertake any actions in connection with the transaction for the combination of the olefins and polyolefins businesses in Thailand. Type : To Consider and approve ______________________________________________________________________ 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.

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