Sommai Khowhachaporn

Part of Thai Oil Public Co. Ltd., Thai Lube Base Public Co., Ltd. is a company that refines and produces lube base oil products. The company is based in Cholburi, Thailand. The CEO of the company is Abhinant Supatrabutra. Thai Lube Base Public Co. was acquired by Thai Oil Public Co. Ltd. from Nippon Oil Corp. on October 20, 2004 for $48.34 million.

PTT Aromatics & Refining Public Co. Ltd. manufactures cyclic organic crudes and intermediates. The company's principal activities are aromatics and refinery businesses. It supplies and refines petroleum products, such as liquefied petroleum gas, light naphtha and reformate, middle distillates including jet fuel and diesel and heavy products including fuel oil. The group is also engaged in the production and sale of aromatics products, which includes benzene, paraxylene, orthoxylene, toluene and mixed xylenes. The company was founded on September 13, 2007 and is headquartered in Bangkok, Thailand.

National Petrochemical Public Co. Ltd. produces and distributes olefins, which consists of ethylene and propylene. The company is headquartered in Bankok, Thailand.

Thaioil Power Co. Ltd. is engaged in generation of electric power. The company operates and manages a natural gas-fired combined-cycle co-generation power plant. Thaioil Power was founded in 1997 and is headquartered in Bangkok, Thailand.