Subsidiaries and Affiliates

Remarks : Significant change in the shareholding structure in subsidiaries and affiliates from 1 January 2022 to 15 September 2023

(1) June 30^th, 2022 : PTTGC International (Netherlands) B.V. (GC BV) purchase additional ordinary share of Vencorex Holding (Vencorex). As a result, GC BV currently holds 100% of Vencorex shares.

(2) July 1^st, 2022 : AGC Vinythai Public Company Limited (AVT) was established by the amalgamation between Vinythai Public Company Limited (VNT) and AGC Chemicals (Thailand) Co., Ltd. (AGC-TH). After the shares allocation of AVT, GC effectively holds 27.32% of AVT shares.

(3) July 1^st, 2022 : GC restructured the group business by means of entire business transfer from GC Glycol Co.,Ltd. (Glycol) and GC Styrenics Co.,Ltd. (GCS) to GC. As a result, GC directly and indirectly holds 74% of GC-M PTA and TPRC shares.

(4) August 31^st, 2022 : GC Glycol Co., Ltd. (Glycol) and GC Styrenics Co., Ltd. (GCS) have already registered their dissolutions.

(5) September 1^st, 2022 : The company received the share transfer of Dynachisso Thai Co. Ltd. (DYCT) and Revolve Group Limited (RGL) from Solution Creation Co., Ltd (SUN).

(6) September 1^st, 2022 : The company received the 1% share transfer of GC Marketing Solutions Company Limited (GCM) and the 1% share transfer of GC Logistics Solutions Company Limited (GCL) from Solution Creation Co., Ltd (SUN). As a result, GC currently holds 100% of GCM and GCL shares.

(7) September 30^th, 2022 : GC Marketing Solutions Company Limited (GCM) purchased additional ordinary share of PT GCM Marketing Solutions Indonesia (GCM Indonesia) from PT. Cipta Aneka Air. As a result, GCM currently holds 100% of PT GCM Marketing Solutions Indonesia shares.

(8) December 9^th, 2022 : The company changed proportion of shareholding in Thai Tank Terminal Company Limited (TTT) to 36.43% and resulted to the change in investment of TTT from subsidiary company to joint venture company.

(9) December 15^th, 2022 : The company subscripted new ordinary shares in AGC Vinythai Public Company Limited (AVT). As a result, GC currently holds 32.72% of AVT shares.

(10) December 29^th, 2022 : PTT Energy Solutions Company Limited (PTTES) has already registered its dissolution.

(11) March 31^st, 2023 : PTT Phenol Co.,Ltd. (Phenol) and GC Oxirane Co.,Ltd. (GCO) have already registered their dissolutions.

(12) September 5^th, 2023 : PTTGC Innovation America Corporation (GCIA)  changed the company’s name to  GC America Sustainability Corporation (GCAS) and PTTGC America Corporation (GCA Corp) currently hold 100% share of GCAS.