Westlake Chemical Corp. manufactures and markets petrochemicals, polymers and fabricated building products. It operates through the following segments: Olefins and Vinyls. The Olefins segment manufactures ethylene, polyethylene and styrene and associated co-products at the manufacturing facility in Lake Charles and polyethylene at the Longview facility. The Vinyls segment manufactures and sells building products fabricated from polyvinyl chloride, including pipe, fittings, profiles, foundation, building products, fence and deck components, window and door components, film and sheet products. The company was founded by Ting Tsung Chao in 1986 and is headquartered in Houston, TX.