IRPC Annual Report 2023

Corporate Sustainability Assessment IRPC attaches great importance to the management of eco-efficiency of manufacturing processes and its constant improvement, along with respect for human rights, enterprisewide innovation and workforce development, climate change adaption as well as water management, occupational health and safety standards, and quality of life of the community and customer relationship management, etc. All these measures, put in place to ensure maximum effectiveness, coupled with dedication of the management and personnel to good governance principles and sustainable development policy, contributed to the company being recognized and selected as a member of the 2023 Dow Jones Sustainability Indices (DJSI) under the Emerging Market category, in the Oil & Gas Refining and Marketing sector for the 10th consecutive year, and was ranked in the top 10% S&P Global ESG Score in the Sustainability Yearbook 2023, which are testament to our business acumen guided by IRPC sustainable development policy, good corporate governance as well as our commitment to maintain a delicate balance in economy, society, environment and the best interests of stakeholders to drive growth and prosperity for all. Managing the impact on stakeholders in the business value chain IRPC conducts internal and external stakeholder engagement every year to understand each stakeholder group’s views, interests, expectations, and concerns, especially from the economic, social, and environmental perspectives. The business unit responsible for engagement with each stakeholder group identifies stakeholders and draws up IRPC’s stakeholder engagement procedure. In addition, the company reviews the formats of stakeholder engagement activities and channels on an annual basis, to reassure stakeholders that the company provides them with the opportunity to participate in such activities to express their opinions freely and transparently as appropriate. Stages of implementation IRPC’s Stakeholder Engagement Procedure ขั้นที่ 5 • Outcome: Summary implementation report Interview evaluation and analysis Stage 5 • Outcome: A plan to interview representatives of all stakeholder groups to encourage participation Draw up a plan for stakeholder participation and guidelines Stage 3 ขั้นที่ 1 Prioritize key issues • Outcome: Summary of key issues and topics for stakeholder interviews Stage 1 Stage 6 • Outcome: Future stakeholder engagement strategy, projects and guidelines. Develop future engagement guidelines Stage 4 • Outcome: Interview results Collect interview feedback Stage 2 • Outcome: All internal and external stakeholder groups are covered Identify internal and external stakeholders 108 Business-Driven Sustainability IRPC Public Company Limited

RkJQdWJsaXNoZXIy ODg4NTI=