GC One Report 2023 [EN]

Non-f inancial Informat ion: Non-f inancial information includes the operating structure of GC Group, risk management, business operations for sustainability, corporate governance, and material information about the Board of Directors, Sub-committees, Executives, and employees. Channels for the Disclosure of Material Information in Thai and English: The SETLink system by Stock Exchange of Thailand. GC’s regularly updated website, www.pttgcgroup. com, where channels for contacting the Board and other divisions are also fully and clearly displayed. Information and updates were disclosed to stakeholders via e-mail, exhibitions, press release and other activities through media, such as newspapers, television, and social media. The Investor Relations Department serves as the center of communication, where essential information is made known to shareholders, institutional and minor investors, analysts, and relevant regulatory authorities. It also oversees the quality of financial reporting processes and essential information that could affect the price of its securities, such as financial statements, performance results, earnings reports and quarterly and annual Management Discussion and Analysis (MD&A). These are all indicators of the Company’s financial standing, performance, and future trends. The Investor Relations Department also manages the disclosure of information via the SET Community Portal to foreign and domestic investors to ensure fairness. Furthermore, an Investor Relations Code of Conduct has been established to determine the roles and best practices that enable investor relations officers to treat all shareholders equitably. In 2023, GC’s Executives met with shareholders, financial analysts, investors, and employees through activities, including both virtual and in-person meetings, in order to regularly present GC’s performance. These activities included analyst meetings, domestic and international roadshows, and retail-investor events. GC also welcomed investors who visited the Company. Below is a summary of these events: Investor Meetings Domestic meetings 9 times Meetings aboard 11 times Investor meetings through virtual roadshows / conferences 10 times Meetings at the Company 11 times Meetings with financial analysts 4 times Telephone conferences 18 times Information Disclosure Disclosure via SET Portal and Company Website 21 times Activities Bondholder activity 1 time Basic training with financial analysts 2 times Analyst meeting / Fund site visits 4 times Investors or interested persons may contact the Company via the following five channels for more information: (1) Mail : Investor Relations Department, PTT Global Chemical Public Company Limited 555/1 Energy Complex, Building A, 18th Floor, Vibhavadi Rangsit Road Chatuchak, Bangkok 10900 (2) Phone : 66 (0) 2265-8400 ext. 8670, 8665, 8533, and 8534 (3) e-Mail : ir@pttgcgroup.com (4) Fax : 66 (0) 2265-8500 (5) Website: www.pttgcgroup.com 194

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