GC One Report 2023 [EN]

3. Reporting the Performance, Assessment, and Development of Directors Reporting the performance and assessment results (group assessment and self-assessment) of the Corporate Governance and Sustainability Committee for 2023 to the Board of Directors for acknowledgment. Reviewing the Corporate Governance and Sustainability Committee Charter to ensure alignment with the roles and responsibilities and any applicable criteria and practices. Reviewing the Corporate Governance and Sustainability Committee’s assessment forms (group assessment and self-assessment) to ensure alignment with the Corporate Governance and Sustainability Committee Charter and compliance with the criteria and practices prescribed by international standards and domestic regulatory agencies. Considering and providing comments on the employment of former executives from the level of Chief Operating Officer (COO) upward. Continuously ensuring Director development under good corporate governance principles by encouraging Directors to attend training courses of the Thai Institute of Directors Association (IOD). The Corporate Governance and Sustainability Directors attended a lecture entitled ESG Reporting Updates & Linkages to Financial Reporting, organized by Deloitte Touche Tohmatsu Co., Ltd. Pre-setting the dates for its meetings for the entire year of 2024 to consider and acknowledge the Company’s performance and report/provide any recommendations to the Board of Directors and the Management. The Corporate Governance and Sustainability Committee places great importance on ensuring GC’s strict compliance with the Corporate Governance Policy and Business Code of Conduct. The Corporate Governance and Sustainability Committee is also committed to continually enhancing corporate governance practices on par with international standards and believes that good corporate governance and sustainable development are vital factors in promoting operational efficiency and business sustainability, which will enable GC to earn the confidence of its stakeholders as well as international recognition. On behalf of the Corporate Governance and Sustainability Committee (Signed) Somkit Lertpaithoon (Professor Somkit Lertpaithoon) Chairman of the Corporate Governance and Sustainability Committee 215 PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED Form 56-1 One Report 2023

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