Cement Industry

- Siam Cement

- Siam City Cement

- TPI Polene



Contractors

- Goshu Kohsan

- Italian-Thai Development

- MHI

- Nawarat Pattanakarn

- Sumsung Engineering

- Toyo-Thai Corporation


Paper Mills

- Advance Agro

- Bang Pa-In Paper Mill

- Siam Kraft Industry

- Thai Paper 
General Industry

- Mahaphant Fibre Cement

- Michelin Siam

- Padaeng Industry

- Pimai Salt

- Siam Fibre Cement

- Siam Tyre

Oil & Gas

- Alliance Refining Company

- Bangchak Petroleum

- Chevron Thailand

- Exxon Mobil

- PTT

- PTT-EP

- Siam Gas

- Thai Oil


Trailer Manufacturers

- CTV Doll

- Heil Asia

- Nonthaburi Trailer Truck and Bus

- Panus Assembly

- Sutee Tankers & Special Trucks

- T-Belco

Petrochemical Industry

- IRPC(TPI)

- PTT Chemical

- Thai Aromatic

- TPC

- Vinythai

Steel Industry

- Sahaviriya Steel Industry

- Siam Yamato Steel

- Thai Cold Rolled Steel Sheet

- The Siam Construction Steel