Paibulya Punyavutti

Founded in 1970, Linde (Thailand) Public Co. Ltd. is a subsidiary of Linde Plc. The company distributes industrial gas and is based in Samutprakarn, Thailand.

PTT Chemical Public Co. Ltd. is engaged in the production and distribution of Ethylene, Propylene and Polyethylene. The company's by products are Mixed C4, Pyrolysis gasoline, Cracker bottom and tail gas. PTT Chemical is also involved with the production and distribution of electricity, water, stream, and other utilities. It operates production support facilities such as jetty and buffer tank farm services for liquid chemical, oil and gas. The company was founded December 7, 2005 and is headquartered in Bangkok, 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.

ATOP Corp. manufactures optical transceivers. It develops a dual platform that offers automated development and low cost transceiver test system. Its products include transceivers, media converter, optical sub-assemblies, splitter, and passive components. The company was founded in October 2006 and is headquartered in Mianyang, China.