GC One Report 2023 [EN]

PTT Global Chemical Public Company Limited and its Subsidiaries For the year ended 31 December 2023 PTT Global Chemical Public Company Limited and its Subsidiaries Notes to the financial statements For the year ended 31 December 2023 31 Name of entities Country of incorporation Nature of relationships PTTEP Siam Limited Thailand Other related party, indirect shareholding by parent company PTT Exploration and Production Plc. Thailand Other related party, shareholding by parent company, common director PTT RAISE Co., Ltd. Thailand Other related party, indirect shareholding by parent company PTT Tank Terminal Limited Thailand Other related party, shareholding by parent company PTT LNG Co., Ltd. Thailand Other related party, shareholding by parent company Sak Chaisidhi Co., Ltd. Thailand Other related party, indirect shareholding by parent company Sport Services Alliance Co., Ltd. Thailand Other related party, indirect shareholding by parent company Sarn Palung Social Enterprise Company Limited Thailand Other related party, 15% shareholding and shareholding by parent company Eastern Fluid Transport Co., Ltd. Thailand Associate, 15% shareholding by the Company and 15% shareholding by subsidiary until November 2022. Subsequently, other related party, 15% shareholding by the Company and 15% shareholding by joint venture. UBE Chemicals (Asia) Plc. Thailand Other related party, indirect shareholding by parent company PT.Tirta Surya Raya Indonesia Other related party, indirect shareholding by parent company PTT International Trading London Ltd. England Other related party, shareholding by parent company PTT International Trading Pte. Ltd. Singapore Other related party, shareholding by parent company PTT International Trading USA Inc. United States of America Other related party, shareholding by parent company PTT MEA Ltd. United Arab Emirates Other related party, indirect shareholding by parent company TOP Solvent (Vietnam) LLC. Vietnam Other related party, indirect shareholding by parent company TPBI & Myanmar Star Co., Ltd. Myanmar Other related party, shareholding by subsidiary Significant transactions with related parties Consolidated financial statements Separate financial statements Year ended 31 December 2023 2022 2023 2022 (in million Baht) Parent Sales of goods or rendering of services 19,584 12,431 19,304 12,176 Purchases of goods or receiving of services 343,693 377,709 342,530 376,307 Other income 14 64 14 64 Finance costs 20 20 20 19 Other expenses 55 57 54 56 Expense capitalised to fixed assets 1 1 1 1 275 PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED Form 56-1 One Report 2023

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