IRPC Annual Report 2023

About This Report Business-driven sustainability IRPC has disclosed sustainability performance information to stakeholders through the corporate website and “Annual Registration Statement/Annual Report 2023 (Form 56-1 One Report)” as shown in Section 3 Business driven sustainability, as well as disclosing such information on the website www.irpc.co.th in the Sustainable Development section, as is the case each year, to communicate material issues relating to sustainability of our business operations to all stakeholders. This report also contains current status and progress on the implementation of the United Nations Global Compact (UNGC) by preparing a report in accordance with the guidelines for the Annual Registration Statement/Annual Report, Form 56-1 One Report, of Office of the Securities and Exchange Commission (SEC) and the Sustainability Reporting Guideline (Standards) of the Global Reporting Initiative (GRI) at the level of Core Option and additional indicators for companies in the Oil and Gas Sector Disclosure. In Form 56-1 One Report 2023, IRPC maintained the scope of reporting on business-driven sustainability covering economic, social, and environmental operations between January 1 and December 31, 2023, approved by the Board of Directors, the Chief Executive Officer and President as well as high-level executives from relevant departments, and reviewed and audited by KPMG Phoomchai Audit Co., Ltd. to reassure all stakeholders as to its accuracy, reliability, and in alignment with the business operation that is also traceable to the sources of information in every respect. Disclosure of operating results, covering all businesses operated directly or owned by IRPC through shareholding, include IRPC Public Company Limited, as well as subsidiaries under IRPC’s management, with over 50 percent of shares held by IRPC, are: 1) IRPC Oil Company Limited; 2) IRPC A&L Company Limited; 3) IRPC Technology Company Limited; and 4) iPolymer Company Limited; along with Rakpasak Company Limited, whose shares are held indirectly by IRPC through its subsidiaries, amounting to more than 50 percent. The scope of reporting corresponds to other topics contained in this report and from the website www.irpc.co.th. IRPC PUBLIC COMPANY LIMITED 555/2 Energy Complex Building B, 6th Floor, Vibhavadi-Rangsit Rd., Chatuchak, Bangkok 10900 Thailand TEL: 66 (0) 2765-7000 FAX: 66 (0) 2765-7001 www.irpc.co.th QR CODE 375 56-1 ONE REPORT 2023 About This Report

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