Headquartered in Houston, TX·Fiscal year ends December·NYSE: WLK·westlake.com
About Westlake
Westlake Corporation is a global manufacturer and supplier of petrochemicals, polymers, and building products. The company operates through two main segments: Housing and Infrastructure Products (HIP), which produces pipe and fittings, siding and trim, compounds, and other building products for residential construction and infrastructure markets; and Performance and Essential Materials (PEM), which manufactures polyethylene, PVC resin, caustic soda, chlorine, styrene, and other commodity chemicals. Westlake is vertically integrated across the chlorovinyls chain, converting raw materials such as ethane, natural gas, and salt into intermediate and finished products. With approximately 85% of global production capacity located in North America, the company benefits from advantaged feedstock and energy costs relative to global competitors. Westlake serves diverse end markets including housing construction, packaging, healthcare, automotive, consumer goods, and infrastructure. The company has operations in Asia, Europe, and North America, and celebrated 40 years of operations in 2026. Updated
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