Westlake Corporation (WLK) P/E Ratio History
Historical price-to-earnings valuation from 2004 to 2025
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WLK Valuation Context
How does the current P/E compare to historical and market benchmarks?
P/E Ratio Analysis
As of May 6, 2026, Westlake Corporation (WLK) trades at a price-to-earnings ratio of -8.9x, with a stock price of $104.78 and trailing twelve-month earnings per share of $-12.79.
The current P/E is 128% below its 5-year average of 32.4x. Over the past five years, WLK's P/E has ranged from a low of 4.2x to a high of 217.8x, placing the current valuation at the 0th percentile of its historical range.
Compared to the Basic Materials sector median P/E of 22.3x, WLK trades at a 140% discount to its sector peers. The sector includes 123 companies with P/E ratios ranging from 2.0x to 166.2x.
Relative to the broader market, WLK trades at a notable discount to the S&P 500 median P/E of 25.1x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our WLK DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
WLK P/E vs Peers
P/E ratio compared to closely matched public peers
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $9B | 18.9 | 5.86 | -47% | |
| $6B | 15.6 | 0.57 | -2% | |
| $13B | 18.6 | 1.03 | +17%Best | |
| $4B | 21.1 | 6.31 | -15% | |
| $573M | 11.2Lowest | 0.26Best | -19% | |
| $59B | 36.9 | - | -34% |
Peers sorted by market capitalization. P/E below peers may indicate undervaluation or lower growth expectations. Consider PEG ratio for growth-adjusted comparison.
WLK Historical P/E Data (2004–2025)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Date | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2025 Q1 | Mon Mar 31 2025 00:00:00 GM | $100.03 | $2.97 | 33.6x | +89% |
| FY2024 Q4 | $114.65 | $4.62 | 24.8x | +39% | |
| FY2024 Q3 | Mon Sep 30 2024 00:00:00 GM | $150.29 | $0.69 | 217.8x | +1123% |
| FY2024 Q2 | Sun Jun 30 2024 00:00:00 GM | $144.82 | $2.06 | 70.3x | +295% |
| FY2024 Q1 | Sun Mar 31 2024 00:00:00 GM | $152.80 | $1.96 | 78.0x | +338% |
| FY2023 Q4 | Sun Dec 31 2023 00:00:00 GM | $139.96 | $3.67 | 38.1x | +114% |
| FY2023 Q3 | Sat Sep 30 2023 00:00:00 GM | $124.67 | $9.36 | 13.3x | -25% |
| FY2023 Q2 | Fri Jun 30 2023 00:00:00 GM | $119.47 | $10.26 | 11.6x | -35% |
| FY2023 Q1 | Fri Mar 31 2023 00:00:00 GM | $115.98 | $14.56 | 8.0x | -55% |
| FY2022 Q4 | Sat Dec 31 2022 00:00:00 GM | $102.54 | $17.34 | 5.9x | -67% |
| FY2022 Q3 | Fri Sep 30 2022 00:00:00 GM | $86.88 | $20.51 | 4.2x | -76% |
| FY2022 Q2 | $98.02 | $22.10 | 4.4x | -75% |
Average P/E for displayed period: 17.8x
Full WLK Stock Analysis
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Start ComparisonWLK — Frequently Asked Questions
Quick answers to the most common questions about buying WLK stock.
Is WLK stock overvalued or undervalued?
WLK trades at -8.9x P/E, below its 5-year average of 32.4x. At the N/A percentile of historical range, the stock is priced at a discount to its own history.
How does WLK's valuation compare to peers?
Westlake Corporation P/E of -8.9x compares to sector median of 22.3x. The discount suggests lower growth expectations or higher risk.
What is WLK's PEG ratio?
WLK PEG ratio is N/A. Above 2.0 indicates premium valuation relative to growth rate. Historical P/E data spans 2004-2025.