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Westlake Corporation
WLKStockUnited States
Westlake Corporation
Westlake Corporation is an international manufacturer and supplier of petrochemicals, polymers and fabricated building products, which are fundamental to various consumer and industrial markets. The company was founded by Ting Tsung Chao in 1986. it is the largest producer of low-density polyethylene (LDPE) in the US and ranks among the Forbes Global 2000. Westlake Chemical operates in two segments: Olefins and Vinyls, and is also an integrated producer of vinyls, with substantial downstream integration into polyvinyl chloride (PVC) building products.
In 2026, it was ranked 388th among Houston-area Fortune 500 companies in the Greater Houston area.
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What WLK filed
- 4 Nov 2026
- 4 Nov 2026
Investor communication
- 29 Sept 2026
Investor communication
- 31 Aug 2026
- 5 Aug 2026
- 4 Aug 2026
Investor communication
- 29 Jul 2026
- 15 Jun 2026
- 18 May 2026
From SEC EDGAR, the public record of what US-listed companies file. Each document opens on sec.gov.
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