ABB Automa­tion (Thai­land) Co., Ltd.

Hutchin­son Tech­nol­ogy oper­a­tions (thai­land) co. ltd

Geo­me­chan­i­cal Ser­vices Co., Ltd. (GMS)

Sum­it­omo Elec­tric (Thai­land) Lim­ited

Kulthorn Kirby Com­pany Lim­ited (KK)

John­son Con­trols Inter­na­tional (Thai­land) Co.,Ltd.

SCG Inter­na­tional Co.,Ltd.

Bridge­stone Tire Man­u­fac­tur­ing (Thai­land) Co., Ltd.

Bridge­stone Sales (Thai­land) Co., Ltd.

FUJI­FILM (Thai­land) Ltd.

Siam Kub­ota Cor­po­ra­tion Co., Ltd.

Siam Dial Co., Ltd

Ocean Glass Pub­lic Com­pany Lim­ited

Hitachi Asia (Thai­land) Co., Ltd.

CYPRESS SEMI­CON­DUC­TOR (​THAI­LAND) COM­PANY LIM­ITED

Bet­ter World Green Pub­lic Com­pany Lim­ited

THAI TOYO RUB­BER CO.,LTD.

Global Util­i­ties Ser­vices Com­pany Lim­ited (GUSCO)