IRPC Annual Report 2023

Key subsidiaries, joint ventures and associate companies Company Business type Shareholding (Percentage) Paid-up capital (Unit: MB) IRPC Polyol Company Limited Address: 555/2 Energy Complex Building, Building B, 9th Floor, Vibhavadi Rangsit Road, Chatuchak Subdistrict, Chatuchak District, Bangkok Telephone 0-2765-6887 Production and distribution of polyol products 50.00% 370 Mitex Polymer (Thailand) Company Limited Address: 100/60 Sathorn Nakhon Tower Building, 29th Floor, North Sathorn Road, Silom Subdistrict, Bang Rak District, Bangkok Telephone 0-2267-1854 Production and distribution of chemicals 50.00% 120 Company Business type Shareholding (Percentage) Paid-up capital (Unit: MB) IRPC Oil Company Limited Address: 555/2 Energy Complex Building, Building B, 9th Floor Vibhavadi Rangsit Road, Chatuchak Subdistrict, Chatuchak District, Bangkok Telephone 0-2765-6666 Fax 0-2765-6677 Distribution of refined products 99.99% 2,000 Rakpasak Company Limited Address: 555/2 Energy Complex Building, Building B, 9th Floor Vibhavadi Rangsit Road, Chatuchak Subdistrict, Chatuchak District, Bangkok Telephone 0-2765-6666 Fax 0-2765-6677 Note: Subsidiary of IRPC Oil Company Limited Oil tanker rental services/ production and distribution of fertilizers 99.99% 30 IRPC Technology Company Limited Address: 309 Moo 5, Sukhumvit Road, Choeng Noen Subdistrict, Mueang Rayong District, Rayong Province Telephone 0-3802-2835-7 Vocational school 99.99% 750 Innopolymed Company Limited Address: 555/2 Energy Complex Building, Building B, 6th Floor, Vibhavadi Rangsit Road, Chatuchak Subdistrict, Chatuchak District, Bangkok Telephone 0-2765-7000, 0-2765-7158 Production and distribution of nonwoven fabric products and medical consumables 60.00% 282 IRPC A&L Company Limited Address: 555/2 Energy Complex Building, Building B, 9th Floor Vibhavadi Rangsit Road, Chatuchak Subdistrict, Chatuchak District, Bangkok Telephone 0-2765-6666 Fax 0-2765-6677 Distribution of polymers 57.48% 10 iPolymer Company Limited (1) Address: 555/2 Energy Complex Building, Building B, 9th Floor, Vibhavadi Rangsit Road, Chatuchak Subdistrict, Chatuchak District, Bangkok Telephone 0-2117-3994, 065-717-8856 Distribution of polymers and chemicals through E-commerce in China 55.00% 120 Subsidiaries Joint Venture Note: Only active companies are shown. (1) On December 19, 2023, the Board of Directors meeting resolved to approve the dissolution of iPolymer Company Limited and on January 9, 2024, the Extraordinary General Meeting of iPolymer’s shareholders resolved to approve the dissolution of business. The registration for dissolution of business is expected by June 2024. 95 Structure and Business Operations of IRPC 56-1 ONE REPORT 2023

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