CH. Karnchang Public Co Ltd
TTCL Public Co Ltd
Power Line Engineering Public Co Ltd
Bangkok Land Public Co Ltd
Sena Development Public Co Ltd
Prinsiri Public Company Limited
PAE (Thailand) Public Co Ltd
Focus Development and Construction PCL
KTECH Construction Public Co Ltd
Sino-Thai Engineering & Construction Public Co Ltd
Syntec Construction Public Co Ltd
SEAFCO Public Co Ltd
EMC Public Co Ltd
Italthai Group
Alla PCL
Thai Industrial & Engineering Service Public Co Ltd
WHA Industrial Development Public Company Ltd
A.S. Associated Engineering (1964) Co Ltd
Thai Jurong Engineering Ltd