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Daily valuation snapshot
Westlake Corporation: source evidence dated 2026-10-09.
- Daily close (USD)
- $62.29
- Market capitalization (USD)
- $7,960,446,974.92
- Price / earnings (TTM)
- Not reported
- Price / book
- 0.86
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Company overview
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. The Performance and Essential Materials segment offers ethylene, polyethylene, styrene, chlor-alkali, chlorinated derivative products, ethylene dichloride, vinyl chloride monomer, polyvinyl chloride (PVC), epoxy specialty resins, and base epoxy resins and intermediaries. The Housing and Infrastructure Products segment provides residential PVC sidings; PVC trim and mouldings; architectural stone veneers; windows; PVC decking; PVC films for various inflatables, wallcovering, and tape and roofing applications; polymer composite and cement roof tiles; PVC pipes and fittings for various water, sewer, electrical, and industrial applications; and PVC compounds for various housing, medical, and automobile products. This segment also offers consumer and commercial products, such as landscape edging; industrial, home, and office matting; marine dock edging; and masonry joint controls. It offers its products to chemical processors; plastics fabricators; small construction contractors; municipalities; and supply warehouses for use in various consumer and industrial markets, including residential construction, flexible and rigid packaging, automotive products, healthcare products, water treatment, wind turbines, and coatings, as well as other durable and non-durable goods. The company was formerly known as Westlake Chemical Corporation and changed its name to Westlake Corporation in February 2022. Westlake Corporation was founded in 1986 and is headquartered in Houston, Texas. Westlake Corporation is a subsidiary of TTWF LP.
Daily valuation snapshot
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These values come from the daily market snapshot dated 2026-10-09. TTM means trailing twelve months. Use the market date when comparing WLK with another company.
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| Daily close (USD) | $62.29 |
| Market capitalization (USD) | $7,960,446,974.92 |
| Price / earnings (TTM) | Not reported |
| Price / book | 0.86 |
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Read WLK's valuation metrics
Company size
Westlake Corporation's recorded market capitalization is $7,960,446,974.92. It measures the market value of the company's equity, rather than its revenue or cash balance.
Price relative to earnings
P/E compares share price with trailing annual earnings per share. For a company with losses, inspect the earnings figures directly rather than treating a negative multiple as a cheap valuation.
Price relative to book equity
WLK's recorded price-to-book ratio is 0.86. That compares its market equity value with recorded book equity. Examine its business and balance sheet to understand why those values differ.
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