Last 48 quarters of trend data · Basic Materials · Chemicals - Specialty
Quarterly valuation ratios — annualised for comparability. YoY Δ shows same-quarter-prior-year change.
EV/EBITDA has expanded 134.5% YoY to 37.3x, reflecting rising market expectations or slowing EBITDA growth.
| Metric | TTM | Q1 '26 | Q4 '25 | Q3 '25 | Q2 '25 | Q1 '25 | Q4 '24 | Q3 '24 | Q2 '24 | Q1 '24 | Q4 '23 | Q3 '23 | Q2 '23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P/E Ratio → | -6.84 | — | — | — | — | — | 528.83 | 45.27 | 15.09 | 28.51 | — | 14.17 | 12.99 |
| — | — | — | — | — | — | — | +219.5% | +16.2% | +199.9% | — | +102.2% | +249.8% | |
| P/S Ratio | 0.92 | 1.44 | 0.94 | 0.87 | 0.82 | 1.13 | 1.30 | 1.56 | 1.46 | 1.66 | 1.59 | 1.29 | 1.18 |
| — | +27.8% | -27.8% | -44.2% | -43.5% | -31.9% | -17.9% | +21.2% | +23.7% | +49.3% | +59.1% | +82.0% | +67.0% | |
| P/B Ratio | 1.11 | 1.69 | 1.03 | 0.99 | 0.90 | 1.18 | 1.34 | 1.74 | 1.69 | 1.82 | 1.67 | 1.42 | 1.39 |
| — | +43.7% | -23.6% | -42.8% | -46.5% | -35.3% | -19.5% | +22.3% | +21.8% | +32.0% | +32.5% | +29.4% | +9.0% | |
| P/FCF | — | — | — | — | — | — | 24.86 | 19.13 | 780.52 | — | 15.41 | 8.89 | 12.18 |
| — | — | — | — | — | — | +61.3% | +115.3% | +6306.9% | — | +151.9% | +99.9% | +162.5% | |
| EV / EBITDA | — | 37.35 | — | — | 17.84 | 15.93 | 12.37 | 11.93 | 7.84 | 11.15 | — | 7.34 | 6.79 |
| — | +134.5% | — | — | +127.5% | +42.9% | — | +62.5% | +15.5% | +99.9% | — | +55.9% | +133.6% | |
| EV / EBIT | — | — | — | — | — | 799.64 | 31.80 | 24.55 | 11.55 | 20.25 | — | 11.35 | 10.80 |
| — | — | — | — | — | +3847.9% | — | +116.3% | +6.9% | +152.4% | — | +66.8% | +208.0% |
Quarterly margins and returns. Watch for margin compression across consecutive quarters.
Westlake Corporation's operating margin was -5.8% in Q1 2026, up 20.7 pp QoQ and down 4.7 pp YoY. This marks the 3rd consecutive quarter of margin expansion, signaling a sustained improvement in operating efficiency. The trailing four-quarter average of -15.7% lags the current quarter, suggesting the recent improvement is above-trend. Gross margin contracted 48.2% YoY, suggesting cost inflation or competitive pricing pressure.
| Metric | TTM | Q1 '26 | Q4 '25 | Q3 '25 | Q2 '25 | Q1 '25 | Q4 '24 | Q3 '24 | Q2 '24 | Q1 '24 | Q4 '23 | Q3 '23 | Q2 '23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gross Margin | 2.6% | 4.2% | -17.3% | 8.3% | 8.7% | 8.2% | 11.5% | 16.0% | 20.7% | 15.7% | 7.0% | 18.8% | 19.7% |
| — | -48.2% | -249.5% | -48.1% | -57.8% | -48.0% | +63.8% | -14.9% | +4.8% | -33.6% | -59.0% | -4.1% | -38.7% | |
| Operating Margin | -14.1% | -5.8% | -26.5% | -27.0% | -3.7% | -1.1% | 2.3% | 5.8% | 12.7% | 7.5% | -19.5% | 11.2% | 12.2% |
| — | -416.4% | -1241.1% | -567.4% | -129.2% | -115.0% | +111.9% | -48.5% | +3.9% | -53.1% | -297.1% | -14.1% | -53.5% | |
| Net Margin | -13.5% | -6.4% | -21.5% | -27.6% | -4.8% | -1.4% | 0.2% | 3.5% | 9.8% | 5.8% | -17.6% | 9.1% | 9.1% |
| — | -353.4% | -8823.2% | -895.2% | -149.3% | -124.0% | +101.4% | -62.1% | +6.8% | -50.2% | -350.1% | -9.7% | -52.3% |
| Metric | TTM | Q1 '26 | Q4 '25 | Q3 '25 | Q2 '25 | Q1 '25 | Q4 '24 | Q3 '24 | Q2 '24 | Q1 '24 | Q4 '23 | Q3 '23 | Q2 '23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ROE | -14.8% | -1.8% | -5.7% | -7.5% | -1.3% | -0.4% | 0.1% | 1.0% | 2.9% | 1.6% | -4.5% | 2.5% | 2.7% |
| — | -405.9% | -9079.2% | -878.2% | -145.9% | -122.6% | +101.4% | -62.0% | +5.2% | -56.5% | -300.7% | -35.9% | -69.6% | |
| ROA | -7.4% | -0.9% | -2.7% | -3.9% | -0.7% | -0.2% | 0.0% | 0.5% | 1.5% | 0.8% | -2.3% | 1.3% | 1.4% |
| — | -341.5% | -8289.8% | -852.2% | -145.9% | -123.3% | +101.4% | -61.9% | +4.7% | -56.5% | -306.9% | -31.6% | -66.8% | |
| ROIC | -9.0% | -0.9% | -3.8% | -4.1% | -0.6% | -0.2% | 0.4% | 1.0% | 2.2% | 1.3% | -3.1% | 1.9% | 2.1% |
| — | -404.7% | -1146.0% | -523.9% | -125.6% | -113.7% | +111.7% | -48.6% | +4.7% | -56.5% | -273.3% | -31.8% | -66.0% |
Quarterly solvency trend — watch for debt spikes or covenant pressure.
Westlake Corporation's Debt/EBITDA ratio is 49.3x — elevated, raising questions about debt serviceability. The current ratio has weakened 17.7% YoY to 2.17x, tightening the short-term liquidity position. Debt/Equity has risen for 6 consecutive quarters, indicating increasing financial leverage that investors should watch closely.
| Metric | TTM | Q1 '26 | Q4 '25 | Q3 '25 | Q2 '25 | Q1 '25 | Q4 '24 | Q3 '24 | Q2 '24 | Q1 '24 | Q4 '23 | Q3 '23 | Q2 '23 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Debt / Equity | 0.69 | 0.71 | 0.69 | 0.54 | 0.52 | 0.50 | 0.48 | 0.49 | 0.52 | 0.51 | 0.51 | 0.48 | 0.49 |
| — | +41.8% | +45.0% | +10.3% | -0.3% | -1.7% | -6.8% | +2.0% | +6.4% | +1.4% | -0.4% | -7.6% | -8.8% | |
| Debt / EBITDA | — | 49.31 | — | — | 30.20 | 21.73 | 15.20 | 11.88 | 8.45 | 11.11 | — | 8.65 | 8.15 |
| — | +126.9% | — | — | +257.2% | +95.6% | — | +37.3% | +3.8% | +64.5% | — | +27.5% | +118.6% | |
| Current Ratio | 2.24 | 2.17 | 2.24 | 1.99 | 2.47 | 2.64 | 2.80 | 2.79 | 2.61 | 2.46 | 2.37 | 2.54 | 2.95 |
| — | -17.7% | -19.9% | -28.7% | -5.0% | +7.2% | +18.2% | +9.6% | -11.8% | -13.7% | -8.9% | +2.5% | +23.5% | |
| Quick Ratio | 1.65 | 1.56 | 1.65 | 1.39 | 1.75 | 1.86 | 2.04 | 2.04 | 1.94 | 1.83 | 1.79 | 1.91 | 2.17 |
| — | -16.0% | -19.1% | -32.0% | -9.6% | +1.3% | +13.9% | +6.8% | -10.6% | -8.1% | +0.0% | +15.4% | +36.6% | |
| Interest Coverage | -8.92 | -2.75 | -15.17 | -17.90 | -2.13 | 0.13 | 3.46 | 5.74 | 11.34 | 6.83 | -12.61 | 10.13 | 9.98 |
| — | — | — | — | — | — | — | — | — | — | — | — | — |
Includes 30+ ratios · 48 years · Updated daily
Deep dive into WLK consensus models and risk factors.
DCF models, multiple analysis, and analyst estimates.
10-year return with dividends reinvested.
See how regular investing compounds over time.
Compare growth, multiples, and margins vs sector.
Quick answers to the most common questions about buying WLK stock.
Westlake Corporation's current P/E is -6.8x. Quarterly P/E ratios can vary due to seasonal revenue patterns and one-time charges.
Westlake Corporation's current operating margin is -14.1%. Margins have been compressing over recent quarters. Quarterly margins are particularly useful for identifying trend inflections that annual data smooths over.
Quarterly financial ratios reveal short-term trend shifts — margin compression, debt spikes, or valuation re-ratings — that annual figures smooth over. They're essential for active investors tracking Westlake Corporation's business trajectory between earnings reports.