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Westlake Corporation (WLK) is a non-energy raw materials company in the combined advanced and basic chemical producers industry, based in Houston, United States, with about 14,600 full-time employees.
In Q2 2026 (the quarter ended June 30, 2026) revenue was $3.27 billion. Its largest business segment, Performance and Essential Materials, brought in 64% of segment revenue in fiscal year 2025; United States was the largest region with 71%. Its market capitalization was $7.96 billion as of October 9, 2026.
Figures from company filings and market data; latest fiscal year ended December 31, 2025; market data as of October 9, 2026.
Westlake Corporation manufactures and markets performance and essential materials, and housing and infrastructure products in the United States, Canada, Germany, China, Mexico, Brazil, France, Italy, and internationally. It operates through two segments, Performance and Essential Materials and The Housing and Infrastructure Products.
Performance and Essential Materials, with $7.43 billion or 64% of segment revenue in fiscal year 2025. Next: Housing and Infrastructure Products (36%).
United States: 71% of revenue by region in fiscal year 2025, followed by Other (10%).
$7.96 billion as of October 9, 2026.
Listed companies of a similar size in the same industry (combined advanced and basic chemical producers) include Sasol Limited (SSL), Koppers Holdings Inc. (KOP).