01.Thai Summit Auto Parts Industry Co., Ltd. (TSA)

02.Thai Summit Laemchabang Auto part Co., Ltd. (TSLA)

03.Thai Summit Rayong Auto part Industry Co., Ltd. (TSRA)

04.Thai Summit Eastern Seaboard Auto part Industry Co., Ltd.

05.Thai Summit Gold Press Co., Ltd. (TSGP)

06.Thai Summit Plastech Co., Ltd. (TSPT)

07.Thai Summit Auto Press Co., Ltd. (TSAP)

08.Thai Summit Banpho Co., Ltd. (TSBP)

09.Summit Auto Body Industry Co., Ltd. (SAB)

10.Summit Laemchabang Auto body work Co., Ltd. (SLAB)

11.Prospira (Thailand) Co., Ltd. (Bridgestone NCR)

12.Maruyasu Industrial (Thailand) Co., Ltd. (MIT)

13.BHKT Co., Ltd.

14.Union Auto Part Co., Ltd.

01.Daikin Industries (Thailand) Ltd.

02.Daikin Compressor Industries Ltd.

03.Daikin Trading (Thailand) Ltd.

04.General Air Conditioning Manufacturing (Thailand) Co., Ltd.

05.Mitsubishi Electric Siam Compressor Industry Co., Ltd.

06.Shimohira Electric (Thailand) Co., Ltd.

07.Sumitronics (Thailand) Co., Ltd.

08.FUSO Industries (Thailand) Co., Ltd.

09.Kanayama Kasei (Thailand) Co., Ltd.

10.Amagasaki Pipe (Thailand) Co., Ltd.

11.MIC Industries (Thailand) Co., Ltd.