IRPC Annual Report 2023

Structure and Business Operations of IRPC Revenue Structure IRPC and its subsidiaries generated revenues from distribution and sales of products as follows: Revenue from petroleum products accounted for 81 percent of total net sales, primarily from diesel, gasoline, fuel oil, lube base oil and asphalt. Revenue from petrochemical products accounted for 18 percent from olefins, aromatics, and various polymers, or plastic pellets. In addition, the company earned revenue from other businesses, accounting for one percent from electricity and utilities charges. In 2023, IRPC’s net sales revenue totaled Baht 299,075 million as detailed below: Type of business Operated by/shareholding percentage of IRPC 2021 2022 2023 Million Baht % Million Baht % Million Baht % 1. Petroleum IRPC Plc. 160,626 68% 243,953 77% 241,455 81% IRPC Oil Co., Ltd. (99.99%) 2. Petrochemical IRPC Plc. 71,089 30% 70,402 22% 53,376 18% Innopolymed Co., Ltd. (60.00%) IRPC A&L Co., Ltd. (57.48%) iPolymer Co., Ltd. (55.00%) 3. Other businesses (1) IRPC Plc. 3,459 2% 4,041 1% 4,244 1% Total revenue from net sales (2) 235,174 100 % 318,396 100 299,075 100 Share of profits (losses) from investment in associated companies and interests in joint ventures 713 284 254 Source of revenue 2021 2022 2023 Value (MB) % Value (MB) % Value (MB) % Domestic sales 137,817 59% 202,717 64% 196,809 66% International sales 97,357 41% 115,679 36% 102,266 34% - CLMV countries 23,010 10% 33,439 10% 28,135 9% - Other countries 74,347 31% 82,240 26% 74,131 25% Total revenue from net sales 235,174 100% 318,396 100% 299,075 100% Notes: (1) Other businesses include revenue from electricity and utilities charges. (2) Revenue from net sales consists of petroleum business (excluding excise tax), petrochemical business, and electricity and public utilities business. Revenue Structure by business Revenue structure of domestic and international sales 63 Structure and Business Operations of IRPC 56-1 ONE REPORT 2023

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