Westlake Corporation P/E Ratio 2009–2025
Westlake Corporation reported 23.80 of price-to-earnings ratio for fiscal 2024. That was 33.7% lower than fiscal 2023. Compared with fiscal 2019, the change was +22.9%. This is a fiscal-year-end price divided by diluted EPS—not a live valuation—and is omitted when annual EPS is not positive.
| Fiscal year | P/E Ratio | Change (YoY) |
|---|---|---|
| FY 2025 | — | — |
| FY 2024 | 23.80 | -33.7% |
| FY 2023 | 35.91 | +548.5% |
| FY 2022 | 5.54 | -4.0% |
| FY 2021 | 5.77 | -80.2% |
| FY 2020 | 29.13 | +50.5% |
| FY 2019 | 19.36 | +152.6% |
| FY 2018 | 7.67 | -17.7% |
| FY 2017 | 9.31 | -41.1% |
| FY 2016 | 15.82 | +66.8% |
| FY 2015 | 9.48 | -6.2% |
| FY 2014 | 10.11 | -9.5% |
| FY 2013 | 11.18 | -1.9% |
| FY 2012 | 11.40 | +181.0% |
| FY 2011 | 4.06 | -59.8% |
| FY 2010 | 10.09 | -15.5% |
| FY 2009 | 11.94 | — |
Source: Westlake Corporation SEC filings — fiscal-year-end price ÷ diluted EPS. Computed deterministically; refreshed nightly (last updated August 2, 2026). Open WLK 10-K filings at SEC EDGAR · Methodology · Download CSV.
How to read this history
Westlake Corporation reported 23.80 of price-to-earnings ratio for fiscal 2024. That was 33.7% lower than fiscal 2023. Compared with fiscal 2019, the change was +22.9%. This is a fiscal-year-end price divided by diluted EPS—not a live valuation—and is omitted when annual EPS is not positive. Values remain missing when the cached filing does not disclose a comparable line item; they are never estimated. Stock splits, reorganizations and fiscal-calendar changes can reduce comparability.
Prepared and reviewed by the stockportfolio.pro research desk. Corrections: support@stockportfolio.pro.
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What is Westlake Corporation's price-to-earnings ratio?
Westlake Corporation (WLK) reported price-to-earnings ratio of 23.80 for fiscal year 2024, per its SEC filings.
How has Westlake Corporation's price-to-earnings ratio changed over time?
Between fiscal 2009 and 2025, WLK's price-to-earnings ratio grew at roughly 4.4% per year (compound annual rate), from 11.94 to 23.80.
Where does this data come from?
Figures are computed from Westlake Corporation's official SEC filings (fiscal-year-end price ÷ diluted EPS), refreshed nightly. Not investment advice.
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