GC One Report 2023 [EN]

National Level Creative Excellence Awards GC received Creative Excellence Awards under the Creat ive Business Awards category for Sustainable Project (For Large Organizat ion) , which was held by the Cr ea t i ve Economy Agency ( Pub l i c Organization), or CEA, through the "Enjoy Rayong’s Local Dishes with Community Chef" project, which has positively impacted the economic, social, and environmental aspects, contributing to the country's sustainable growth. SET ESG Rating 2023 GC has obtained ‘AAA’ level assessment from the SET ESG Rat ings 2023 and maintained our position on the Thailand Sustainability Investment (THSI) list for the ninth consecutive year (2015-2023). This val idates the company’s endeavors to broadly create benefits for both internal and external stakeholders in the environmental, social, and corporate governance aspects wh i l e operat i ng i n compl i ance wi th international standards. SET Sustainability Awards of Honor GC has been presented wi th the SET Sustainability Award of Honor under the SET Sustainability Excellence category, for the sixth consecutive year, at the SET Awards 2023 held by the Stock Exchange of Thailand (SET). This reflects the remarkable alignment of our business operations with sustainable development pract ices as wel l as the comprehensive and transparent disclosures on our operations. NACC Integrity Awards GC was awarded a consolation prize for the 11th NACC Integrity Awards by Office of the Nat ional Ant i-corrupt ion Commission (NACC) as recognition for its business operationswith transparency, anti-corruption, and corporate social responsibility under good corporate governance principles as well as for its emphasis on human rights and compliance with the international ethics standard. Sustainability Disclosure Award GChas received theSustainabilityDisclosure Award from Thaipat Institute, reflecting the company ’ s di sc l osure of benef i c i a l sustainability information to stakeholders and our response to the Sustainable Development Goals (SDGs). The Prime Minister’s Industry Award GC has won the Prime Minister’s Industry Award in two categories, namely Safety Management and Energy Management. The Prime Minister’s Industry Award is held by the Ministry of Industry to support, promote and develop entrepreneurs in the Thai industrial sector to meet standard quality while strengthening their readiness for competition in the international arena. Outstanding Award in Anti-corruption in 2023 The company received the Anti-corruption Award 2023. This award honors organizations that demonstrate outstanding anti-corruption efforts, evident to society, and adhere to management values based on principles of good governance. Committed to ethics, morality, and integrity, serving as role models and contributing to social welfare. CAC Award CAC Change Agent Award GC has been certified as a member of the Thai Private Sector Collective Action Against Corruption (CAC) for the third consecutive time on June 30, 2023. Accordingly, GC also emphasizes the expansion of transparent business networks, ensuring zero tolerance for corruption across supply chain, including business partners. This commitment aims to elevate the standards of business conduct with good corporate governance principles, al igning wi th the organizat ion's goal of sustainable development. Consequently, the company has received the CAC Change Agent Award for the second consecutive year. IAA Awards for Listed Companies 2022-2023 The IAA Awards for Listed Companies 2022-2023 was organized by the Investment Ana l ysts Assoc i at ion ( IAA) to honor knowledgeable and capable executives of listed companies who have steered their companies towards success and sustainable growth. GC has obtained three awards, including Outstanding CEO, Outstanding CFO, and Best IR in the Industrial Products category. CSR-DIW Continuous Award 19 plants under GC Group have received the CSR-DIWContinuous Award for the 16th consecutive year. Outstanding Ethics Award, Thai Chamber of Commerce GC has attained the Outstanding Ethics Award from the Thai Chamber of Commerce, which attests to the company’s commitment to corporate governance, integrity, and fairness in business operations as well as awareness of resource efficiency, which is t ru l y a sus ta i nab l e success for the organization. 19 PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED Form 56-1 One Report 2023

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