Westlake Corporation is a global manufacturer of materials and specialty chemicals headquartered in Houston, Texas. The company operates across the olefins and vinyls value chains, producing ethylene, polyethylene, chlorine, caustic soda, ethylene dichloride (EDC), vinyl chloride monomer (VCM), and polyvinyl chloride (PVC) resins, along with a range of formulated vinyl and polyolefin products. Through its housing and infrastructure businesses, Westlake also makes pipe and fittings, siding, roofing, trim, windows, and other building components.
Westlake supplies markets including packaging, construction, infrastructure, automotive, and consumer goods, with manufacturing and R&D sites in North America, Europe, and Asia. Formerly known as Westlake Chemical Corporation, it is listed on the New York Stock Exchange under the ticker WLK.