Sustainability Approach

About the Report

IRPC has disclosed sustainability performance information to stakeholders through the corporate website and “Annual Registration Statement/Annual Report 2025 (Form 56-1 One Report)” as shown in “Driving Business Toward Sustainability” under Part 1: Business Operations and Performance, 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 2025, IRPC maintained the scope of reporting on business-driven sustainability covering economic, social, and environmental operations between January 1 and December 31, 2025, 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 SGS (Thailand) Limited 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 and 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.

Sustainability Framework

We are committed to “Shape Material and Energy Solutions in Harmony with Life” in accordance with sustainable development principles. We adhere to principles and practices grounded in social responsibility by fostering stakeholder engagement and trust through operational excellence and transparency, while continuously advancing innovation and technology development. This approach ensures stable and sustainable business growth across three dimensions: environmental, social, and governance and economic, while contributing to the achievement of the United Nations Sustainable Development Goals (SDGs).

Sustainability Strategy, Target and Performance

IRPC’ s Sustainability Strategy focuses on addressing material issues critical to its business through the 3C Strategy: Climate Change (C1), Circular Economy (C2), and Creating Shared Value (C3).

ESG Performance Highlight

Corporate Sustainability Assessment

IRPC is committed to promoting sustainable growth by integrating eco-efficiency and social responsibility into its operations. The Company placed strong emphasis on managing the eco-efficiency of production processes and driving continuous improvement. This commitment encompasses respect for human rights, fostering innovation across the organization, human capital development, climate change management, water resource management, adherence to occupational health and safety standards, enhancement of community well-being, and customer relationship management. We remain dedicated to conducting business in accordance with good corporate governance principles and our sustainability policy.

This consistent commitment to sustainability excellence has been recognized at the international level. IRPC has been recognized under the Dow Jones Sustainability Indices (DJSI) framework and has participated in the S&P Global Corporate Sustainability Assessment (CSA) for 12 consecutive years within the Oil & Gas Refining and Marketing industry. In 2025, the Company’s performance was further acknowledged through inclusion in the S&P Global Sustainability Yearbook 2026. These recognitions reflect IRPC’s strong governance framework and its ability to integrate economic, social, environmental, and stakeholder considerations into business operations in a balanced and sustainable manner.

Further reinforcing our sustainability credentials, the Company has been continuously included in the FTSE4Good Index Series. This inclusion affirms that IRPC’s performance aligns with international ESG (Environmental, Social, and Governance) standards and demonstrates our successful integration of sustainability into corporate strategy. We remain committed to advancing sustainable development and delivering long-term value to all stakeholders.

In addition to global index recognition, IRPC has achieved significant distinction in human rights performance. The Company has been honored with the “Gold Level Human Rights Model Organization Award” for seven consecutive years, becoming the first and only private-sector organization in Thailand to consistently maintain this highest level of recognition. This achievement underscores that human rights management is deeply embedded in IRPC’s corporate culture and serves as a key mechanism in promoting transparency, accountability, and equitable treatment of stakeholders in accordance with international principles.