IRPC One Report 2022 EN

Notes: Only operating companies are shown. (1) On July 25, 2022, the Board of Directors meeting resolved to approve the dissolution of PTT Energy Solutions Co., Ltd. (PTTES), and on August 29, 2022, the Extraordinary General Meeting of Shareholders of PTTES resolved to approve the dissolution of PTTES. The dissolution was registered with the Ministry of Commerce on December 29, 2022. Company Business Type Shareholding proportion Paid-up capital (Unit: Million Baht) Guangzhou Saiju Performance Polymer Ltd. Address: G314, No. 201, Kezhu Road, New and Hi-tech Industrial Development Zone, Science City, Guangzhou, China, 510000 Tel. 020-38033614 Distribution of polymers and chemicals through E-Commerce in China 15.00% 8.9 (Million Yuan) Sarn Palung Social Enterprise Co., Ltd. Address: 555/1 Energy Complex Building A, 10th Floor, Vibhavadi Rangsit Road, Chatuchak Subdistrict, Chatuchak District, Bangkok Tel. 0-2537-2971 Support execution of social enterprises 15.00% 2.5 Rayong Acetylene Company Limited Address: 2/3 Moo 14, Bangna-Trat Road, Km. 6.5, Bang Kaeo Subdistrict, Bang Phli District, Samut Prakan Province Tel. 0-3862-1680, 0-3861-9577 Production and distribution of acetylene gas 13.04% 115 Other investment Company Business Type Shareholding proportion Paid-up capital (Unit: Million Baht) PTT Energy Solutions Company Limited (1) Address: 888 Map Chalood-Laem Son Road, Huai Pong Subdistrict, Mueang Rayong District, Rayong Province Tel. 0-3897-8300, Fax 0-3897-8333 Engineering consultant 20.00% 150 56-1 One Report 2022 92 IRPC PUBLIC COMPANY LIMITED

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