stockrowWestlake Corporation
WLK Basic Materials Specialty Chemicals
Westlake Corporation’s revenue for fiscal 2025 (year ended December 2025) was $11.2 billion, down 8.01% from fiscal 2024.
- Revenue
- +5.04%
- EPS
- +102.3%
- Free cash flow
- +486.0%
- Total debt
- +8.76%
Quarter to September 2026, against a year earlier
Follow WLK
Alert me
Westlake Corporation (WLK) Gross margin
Westlake Corporation's gross margin over the twelve months to 30 September 2026 was 10.8%, up 3.5 percentage points from fiscal 2025 (7.28%). Over the past ten years it has ranged from 7.28% (fiscal 2025) to 29.7% (fiscal 2021) — the current reading is the lowest in ten years. That is below the Specialty Chemicals industry median of 27.8% and below the Basic Materials sector median of 25.0%.
Gross margin, annual
Embed this chart
Annual newest first
| Period | Gross margin | Change (points) |
|---|---|---|
| FY2025 | 7.28% | (8.84) |
| FY2024 | 16.1% | (1.56) |
| FY2023 | 17.7% | (8.11) |
| FY2022 | 25.8% | (3.88) |
| FY2021 | 29.7% | 16.04 |
| FY2020 | 13.6% | (1.89) |
| FY2019 | 15.5% | (7.49) |
| FY2018 | 23.0% | 1.11 |
| FY2017 | 21.9% | 2.53 |
| FY2016 | 19.4% | (7.18) |
Quarterly newest first
| Period | Gross margin | Change (points) |
|---|---|---|
| Sep 2026 | 12.8% | (7.12) |
| Jun 2026 | 19.9% | 15.71 |
| Mar 2026 | 4.22% | 0.79 |
| Dec 2025 | 3.43% | (4.89) |
| 43 more quarters | Free account |
Against its own ten years
Gross margin against peers
| Company | Gross margin |
|---|---|
| SQM Sociedad Quimica y Minera S.A. compare | 37.5% |
| ESI Element Solutions Inc. compare | 36.6% |
| AXTA Axalta Coating Systems Ltd. compare | 33.6% |
| SSL Sasol Ltd. compare | 33.5% |
| NEU NewMarket Corporation compare | 31.7% |
| SOLS Solstice Advanced Materials Inc. compare | 30.9% |
| ALB Albemarle Corporation compare | 25.8% |
| EMN Eastman Chemical Company compare | 20.6% |
| WLK Westlake Corporation | 10.8% |
| Specialty Chemicals industry median | 27.8% |
| Basic Materials sector median | 25.0% |
| Market median | 45.1% |
What Gross margin is
Gross Margin tells an investor how much of each sale a company keeps after paying the direct costs of making or buying what it sells.
Gross Profit ÷ Revenue
More on WLK
- Revenue
- Net income
- EPS (diluted)
- EBITDA
- Free cash flow
- Operating cash flow
- Operating margin
- Net margin
- Free cash flow margin
- P/E ratio
- P/S ratio
- P/B ratio
- Price to free cash flow
- EV/EBITDA
- EV/Sales
- EV/FCF
- Return on equity
- Return on assets
- Return on invested capital
- Debt to equity
- Current ratio
- Total debt
- Shares outstanding
- Book value per share
- Revenue growth
- Piotroski F-score
- Altman Z-score
- Beneish M-score
- The full statement