Chainoi Puankosoom

Golden Land Property Development Public Co., Ltd. engages in the investment, construction, and development of real estate properties. It operates through the following segments: Real Estate Business, Rental and Commercial Building Business, and Hotel Business. The Real Estate Business segment refers to residential projects. The Rental and Commercial Building Business segment include the construction of apartments, hotels, and office buildings. The Hotel Business segment is the operation and management of hotel properties. The company was founded on September 12, 1978 and is headquartered in Bangkok, Thailand.

HMC Polymers Co. Ltd. manufactures polypropylene products. Its products include Moplen Homopolymer, Random Copolymer, & Impact Copolymer, Adstif, and Clyrell. The company was founded in 1983 and is headquartered in Bangkok, Thailand

Part of The Siam Cement Public Co. Ltd., Rayong Olefins Co. Ltd. is a company that manufactures olefin products. The company is based in Rayong, Thailand.

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.

IRPC Polyol Co. Ltd. designs, develops and manufactures polyether polyols, polyester polyols, prepolymer, polyurethane systems and CASE products (coating, adhesives, sealant and elastomer) and its application services. The company was founded in 1987 and is headquartered in Bangkok, Thailand.

National Power Supply Co., Ltd. builds, owns, and operates power plants. It specializes in coal, diesel, and nuclear electricity generation. The company was founded on July 7, 1995 and is headquartered in Srimahaphote, Thailand.

Nathalin Co., Ltd. operates petroleum and chemicals tanker in Thailand. It provides services which include logistics and storage. The company was founded on July 21, 1987 and is headquartered in Bangkok, Thailand.

Independent Power Thailand Co. Ltd. owns and operates a power plant. The company is headquartered in Chonburi, Thailand.

Part of PTT Global Chemical Plc, PTT Phenol Co., Ltd. produces and distributes phenol and acetone. The private company is based in Bangkok, Thailand. PTT Phenol Co. was acquired by PTT Global Chemical Plc on May 02, 2013 for $171 million.

Part of Thai Oil Public Co. Ltd., PTT Utility Co. Ltd. is a company that generates and supplies electricity. The company is based in Bangkok, Thailand. PTT Utility Co. was acquired by Independent Power Thailand Co. Ltd. from PTT Public Co., Ltd. on January 10, 2013.

Sapthip Co., Ltd. produces ethanol and is ultimately controlled by the Government of Thailand. The private company is based in Bangkok, Thailand.

Tra Land Development Co., Ltd. provides real estate development services. The company is located in Thailand.