Thai Oil Public Company Limited, together with its subsidiaries, engages in the oil refining and distribution, petrochemicals, lube base oil, and other businesses in Thailand and internationally. It operates through Oil Refinery, Lube Base Oil Refinery, Petrochemical, Power Generation, Marine Transportation Services, Solvent, Ethanol, and Others segments. The company produces gasoline, diesel/gas oil, jet fuel, kerosene, fuel oil, and liquefied petroleum gas; and petrochemical products, such as paraxylene, benzene, toluene, and mixed xylenes. It also produces and distributes lube base oil, bitumen/asphalt, and other by-products, as well as special products, such as treated distillate aromatics extract and slack wax; and hydrocarbon and chemical solvents, and other chemicals. In addition, the company operates natural gas-fired combined-cycle co-generation power plants that generate and sell electricity, steam, and utilities to industrial users, as well as invests in other power generating companies and related business. Further, it is involved in the marine transportation of petroleum, petrochemical, and liquid chemical products; production of ethanol; provision of marine transportation services for crew and utilities; and biogas power generation and distribution. Additionally, the company provides human resource management services; and manufactures and sells linear alkyl benzene and related products. Thai Oil Public Company Limited was founded in 1961 and is headquartered in Bangkok, Thailand.