Westlake Corporation
Westlake Corporation (NYSE: WLK) is a vertically integrated global manufacturer and marketer of housing and infrastructure products and performance and essential materials. Its two operating segments are Housing and Infrastructure Products (HIP), which makes residential and commercial building products, PVC pipe and… From the company’s description.
Over the twelve months to Sep 30, 2026, Westlake Corporation reported revenue of $11.44B, down 0.4% from a year earlier, and a net loss of $401.00M. Its operating margin was −3.8%, and operations generated $844.00M in cash. In fiscal 2025, it reported revenue of $11.17B, down 8.0% from fiscal 2024, and a net loss of $1.47B.
Margins and return on equity change in ; everything else in percent. Fewer shares and less debt are shown plainly, not as bad news — it depends what you make of buybacks. Dotted labels explain each measure. is shown separately from the annual figures.
What Westlake Corporation does
In the company’s own words
Westlake Corporation (NYSE: WLK) is a vertically integrated global manufacturer and marketer of housing and infrastructure products and performance and essential materials. Its two operating segments are Housing and Infrastructure Products (HIP), which makes residential and commercial building products, PVC pipe and fittings, and polymer compounds, and Performance and Essential Materials (PEM), which produces ethylene, polyethylene, chlor-alkali products, PVC, chlorinated derivatives and epoxy materials. HIP products include siding, trim, stone veneer, roofing, windows, decking and water, sewer and electrical pipe; its customers include contractors, distributors and local customers. PEM materials serve customers in packaging, construction, water treatment, coatings, healthcare, automotive and other industrial markets, with some products used internally in Westlake’s downstream businesses. The company operates manufacturing facilities in North America, Europe and Asia and has approximately 39.2 billion pounds per year of PEM production capacity as of February 2026. At year-end 2025, it had approximately 14,600 employees across 18 countries. Its website is not stated in the provided filing text.
Company details
- Sector
- Materials
- Industry (SIC)
- Chemicals
- Headquarters
- HOUSTON, TX
- Fiscal year end
- December
- CIK
- 1262823
- SIC
- 2860
Financial performance, year by year
Fiscal 2011–2025 · USDThe full income statement, balance sheet and cash flow for each of these years — every figure traceable to its filing — is on the Financials tab with a free account.
Who owns Westlake Corporation — and what changed
Funds as of 2026Q2 · superinvestors as of 2026-06-30
Largest fund holders · Westlake Corporation’s weight in each
Fund ownership is a floor, not a census — pensions, insurers and people holding shares directly are not visible here.
Westlake Corporation’s bonds, as funds hold them
Funds report holding 10 issues of Westlake Corporation’s debt, $535.61M at market value — what funds hold, not the company’s total debt. Weighted-average coupon 4.79%, maturing 2026 to 2061.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Every fund and institutional holder, quarter by quarter, is on the Ownership tab with a free account.
Recent filings
All filings →Each filing opens into its own statements and disclosures here.
Put this business in context.
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