Start with its own history
At 97.00×, WLK is 429.1% above its 9-observation annual average. A lower multiple can reflect a lower price, higher earnings, or weaker growth expectations—not necessarily a bargain.
NYSE · WLKChemicals - SpecialtyUpdated Nov 5, 2026
Westlake Corporation P/E ratio
Current valuation, historical context, and peer comparisons.
Current P/E ratio
97.00×
429.1% abovethe 9-observation annual average
Share price67.9
÷Earnings per share0.7
Price and EPS in quote currency. Calculation details
Investors are paying 97.00 for every 1 of reported earnings per share.
P/E over time
2016 – 2025
Annual P/ESelected-period average 18.33×
3-year average31.11×2 positive annual observations
5-year average18.57×4 positive annual observations
10-year average18.33×9 positive annual observations
Peer median · TTM17.95×4 peers with positive P/E
Historical P/E ratios
Annual period-end data · 22 observations
| Period end | P/E | Change |
|---|---|---|
| Dec 31, 2025 | N/M | N/M |
| Dec 31, 2024 | 24.60× | -34.6% |
| Dec 31, 2023 | 37.62× | +541.0% |
| Dec 31, 2022 | 5.87× | -5.4% |
| Dec 31, 2021 | 6.20× | -80.5% |
| Dec 31, 2020 | 31.75× | +47.6% |
| Dec 31, 2019 | 21.52× | +150.4% |
| Dec 31, 2018 | 8.59× | -18.9% |
View all 22 annual observations +
| Period end | P/E | Change |
|---|---|---|
| Dec 31, 2017 | 10.60× | -41.9% |
| Dec 31, 2016 | 18.24× | +63.8% |
| Dec 31, 2015 | 11.13× | -7.3% |
| Dec 31, 2014 | 12.00× | -10.1% |
| Dec 31, 2013 | 13.36× | -2.6% |
| Dec 31, 2012 | 13.72× | +40.4% |
| Dec 31, 2011 | 9.77× | -20.2% |
| Dec 31, 2010 | 12.26× | -58.5% |
| Dec 31, 2009 | 29.52× | N/M |
| Dec 31, 2008 | N/M | N/M |
| Dec 31, 2007 | 10.22× | +3.1% |
| Dec 31, 2006 | 9.91× | +27.0% |
| Dec 31, 2005 | 7.80× | -45.8% |
| Dec 31, 2004 | 14.38× | N/M |
Change is relative to the preceding observation. N/M values are excluded from averages.
How WLK compares
Company P/E vs. peer trailing-12-month ratios
| Company | P/E ratio |
|---|---|
 WLK This stockWestlake Corporation | 97.00× |
 LYBLyondellBasell Industries N.V. | 15.82× |
 DOWDow Inc. | N/M |
 OLNOlin Corporation | N/M |
 HUNHuntsman Corporation | N/M |
 CECelanese Corporation | 20.90× |
 EMNEastman Chemical Company | 11.92× |
 CCThe Chemours Company | N/M |
 RPMRPM International Inc. | 20.08× |
Peers are selected by the data provider. Business models and earnings definitions can differ.
Put the numbers in context
What does WLK’s P/E tell you?
Compare like with like
The median of the 4 positive peer ratios above is 17.95×. Check growth, margins, debt, and earnings quality before interpreting the gap. A faster-growing business may justify a higher multiple.
Check what drives earnings
One-off gains can temporarily lower P/E; unusual charges can raise it. Reported earnings and forward estimates answer different questions. Pair this view with return on equity and liquidity for a fuller picture.
Keep your research connected
Take WLK into your spreadsheet
Pull historical P/E into Excel or Google Sheets with Wisesheets. Build your own comparisons alongside the rest of your financial model.
Explore WisesheetsQuarterly P/E · latest quarterLQ selects the latest reported quarter. Requires the Wisesheets add-in. See available data
=WISE("WLK", "PE Ratio", "LQ")Sources & calculation methodology
Current P/E
Share price 67.9 ÷ EPS 0.7 = 97.00×. Data is supplied by Financial Modeling Prep through Wisesheets. Quote feed updated Nov 5, 2026; this is not a real-time trading quote.
History & averages
Annual and quarterly P/E observations are provided separately from the current quote. Averages use the latest 3, 5, or 10 annual observations, excluding missing and nonpositive ratios. Pre-IPO observations are omitted. These are period-end observations, not daily averages.
Data definitions and limitations
The current quote feed does not specify the exact EPS filing-period end or whether EPS is basic or diluted. We do not label it as forward P/E. Peer ratios are explicitly trailing-12-month (TTM) values. Historical observations do not include independently verified price and EPS inputs. Sources may update on different schedules; rounded inputs can produce small calculation differences. Historical comparisons describe past pricing, not an estimate of fair value.
WLK P/E ratio: common questions
The essentials behind the numbers.
Westlake Corporation's current P/E is 97.00× based on the quote data last updated Nov 5, 2026. It represents the share price divided by reported earnings per share. Prices and earnings may refresh on different schedules.
Annual P/E uses earnings for a completed fiscal year. Trailing-12-month (TTM) P/E uses the latest four quarters, while forward P/E uses forecast earnings. These are not interchangeable. This page labels peer ratios as TTM and shows dated annual or quarterly historical observations; it does not show forward estimates.
N/M means not meaningful: the feed has no positive P/E for that observation. Negative or zero earnings should not be ranked as a low positive valuation multiple. N/M observations are excluded from the averages shown above.
Divide the share price by earnings per share (EPS). For example, a share price of 100 and EPS of 5 gives a P/E of 20×. This page uses the price and EPS supplied together in the quote when both are positive.
Price timestamps, EPS definitions, share classes, adjustments, and fiscal periods can differ. A forward P/E also uses forecast earnings rather than reported earnings. Compare the inputs and as-of dates before comparing two displayed ratios.
Not necessarily. The average describes previous market pricing, not fair value. Changes in earnings quality, growth expectations, debt, accounting, and business risk can justify a different multiple today.