Vallapa Assakul

Bangkok Expressway Public Co. Ltd. engages in the construction, design, and management of expressways. Its business operation includes Si Rat Expressway, Chalerm Mahanakorn Expressway, and Udon Ratthaya Expressway. It also provides expressway services like network map, communication and facilities, traffic management, and rescue and trailer services. The company was founded on December 23, 1987 and is headquartered in Bangkok, Thailand.

Vinythai Public Co., Ltd. engages in the manufacture and distribution of petrochemical products. It operates through the Vinyl and Biochemical segments. The company was founded on December 27, 1988 and is headquartered in Bangkok, Thailand.

Bangkok Metro Public Co. Ltd. engages in the provision of metro services. It operates through the Mass Rapid Transit Authority of Thailand (MRTA) Initial System Project and Commercial Development Business segments. The Commercial Development Business segment includes rental of retail space, and the provision of advertising media services and telecommunication services in underground train stations. The company was founded on February 18, 1998 and is headquartered in Bangkok, Thailand.

Ocean Life Insurance Public Co., Ltd. (Ocean Life) is an independent insurance management firm headquartered in Bangkok, Thailand. Founded in 1949, Ocean Life offers both individuals and businesses a wide range of insurance products and services which includes ordinary life, accident, health insurance, group insurance and etc.

Siam Estate Co. Ltd. is a Thai company that owns and operates apartments and condominiums. The private company is based in Bangkok, Thailand. Naputt Assakul has been the CEO of the company since 2004.