GC_ONE REPORT 2021_ENG

50% 44.4% SHAREHOLDING STRUCTURE IN SUBSIDIARIES AND AFFILIATES Remarks: Significant change in the shareholding structure in subsidiaries and affiliates from January 1st, 2021 to December 31st, 2021 (1) June 8th, 2021 : The company has completed the transfer of the shares in GPSC to the relevant parties. Therefore, the company’s shareholding in GPSC decreased from 22.73% to 10% (2) November 1st, 2021 : The company has completed the sale of their collective 100% of ordinary shares in EOM and ESC then transferring of business to Emery Oleochemicals UK Limited (EOUK). The company’s shareholding in EOUK of 50% (3) December 29th, 2021 : The company has completed to invest in High Value Business (HVB) by the acquisition of allnex through GC BV. The company’s shareholding in allnex of 100% POLYMERS BUSINESS UNIT EO-BASED PERFORMANCE BUSINESS UNIT GREEN CHEMICALS BUSINESS UNIT PERFORMANCE MATERIALS AND CHEMICALS PHENOL BUSINESS UNIT SERVICES AND OTHERS PRS RAYONG BSA SPSE GPSC(1) 50% 25% 15% 10% PTT Digital KGC VNT PTTES EFT DYCT SPIG RGL TPBIMS 40% 33.4% 41.5% 25% 24.98% GC Inter GCIA GCV GCVA allnex(3) Vencorex GCI TTT ENVICCO 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% 25% 40% 100% 100% 98.82% EOUK(2) PTTMCC 50% 100% 50% 100% 100% 100% 100% 99% 1% 99% 1% 100% 82.1% 51% 72.29% 70% 100% 49% NatureWorks SUBSIDIARIES JOINT VENTURES AFFILIATES OTHERS 41.44% 50% 49% 10% PPCL SUN GCO GCME NPC S&E NPCSG GCS GCTC GCEC GCM GCL GCP GGC Glycol GC-MPTA TPRC 20% 15% PTTAC HMC GCA Corp GCA GC BV 70 PTT GLOBAL CHEMICAL PUBLIC COMPANY LIMITED Form 56-1 One Report 2021

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