Head of Corporate Compliance GC appointed Miss Darawadee Denpaibul as Acting Vice President of Corporate Governance, effective February 16, 2024, and Mrs. Rattana Nakasiri as Vice President of Corporate Governance from October 15, 2015 - December 31, 2023. The responsibilities include overseeing corporate compliance, promoting corporate governance in business practices, and ensuring that the Executives and employees of GC Group comply with laws, rules, and regulations in countries where GC operates. The qualifications of the Head of Corporate Compliance are disclosed in Attachment 3 “Details of Heads of the Internal Audit and Compliance Units.” Heads of Investor Relations and Contact Information Vice President - Corporate Finance & Investor Relations Miss Pornsook Limsathit Tel : 02-265-8670 e-Mail : pornsook.l@pttgcgroup.com Division Manager - Investor Relations Mr. Paween Chiasakul Tel : 02-265-8665 e-Mail : paween.c@pttgcgroup.com Audit fee and non-audit fee of the audit firm and its affiliates Audit fee GC and its subsidiaries paid the audit fee to: KPMG Phoomchai Audit Ltd., the auditor of GC and its subsidiaries, for the fiscal year 2023 totalling Baht 10,339,700. Of this amount, GC paid Baht 3,789,800 and its subsidiaries paid Baht 6,549,900. The audit firm and its affiliates for the fiscal year 2023 totalling Baht 126,657,980. Non-audit fee GC and its subsidiaries paid the non-audit fee for performing agreed-upon procedures in connection with the requirements of the Board of Investment (BOI), transfer pricing services, tax and business consulting services and other audits by agreed-upon procedures to: KPMG Phoomchai Audit Ltd., the auditor of GC and its subsidiaries, for the fiscal year 2023 totalling Baht 1,090,000 and incomplete services in the fiscal year 2023 that will be paid in the future totalling Baht 430,000. The audit firm and its affiliates for the fiscal year 2023 totalling Baht 37,116,429 and incomplete services in the fiscal year 2023 that will be paid in the future totalling Baht 13,759,852. 175 PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED Form 56-1 One Report 2023
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