Westlake Corporation (WLK) Operating Margin
- Operating margin · 12 months: Value -11.02%; Formula and calculation Operating income / revenue. Period ending 2026-06-30..
Operating margin
Overview →Financial period ending 2026-06-30; current quote (m). Amounts retain their stated periods and units.
| Metric | Value | Formula and calculation |
|---|---|---|
| Operating margin · 12 months | -11.02% | Operating income / revenue. Period ending 2026-06-30. $-1.25B ÷ $11.29B × 100 ≈ -11.02% |
Calculation inputs
| Input | Amount with unit | Raw financial data |
|---|---|---|
| Operating income | -1.25B USD | Operating Income (Loss) |
| Revenue | 11.29B USD | |
| Cost of products and services | 10.21B USD | Cost of Goods and Services Sold |
| Research and development | (m) | |
| Selling, general and administration | 941.00M USD | Selling, General and Administrative Expense |
Calculated history
Changes compare with the next older row (previous quarter), unless explicitly labeled otherwise. Rolling 12-month growth compares two successive quarter-end rolling totals; it is not year-over-year growth.
| Period ending | Operating income (USD) | Revenue (USD) | Cost of products and services (USD) | Research and development (USD) | Selling, general and administration (USD) | Operating margin |
|---|---|---|---|---|---|---|
| 2026-06-30 | $-1.25B | $11.29B | $10.21B | (m) | $941.00M | -11.02% |
| 2026-03-31 | $-1.72B | $10.98B | $10.28B | (m) | $909.00M | -15.65% |
| 2025-12-31 | $-1.58B | $11.17B | $10.36B | (m) | $900.00M | -14.13% |
| 2025-09-30 | $-841.00M | $11.48B | $10.43B | (m) | $902.00M | -7.33% |
| 2025-06-30 | $105.00M | $11.76B | $10.44B | (m) | $889.00M | 0.89% |
| 2025-03-31 | $620.00M | $12.01B | $10.29B | (m) | $892.00M | 5.16% |
| 2024-12-31 | $875.00M | $12.14B | $10.19B | (m) | $874.00M | 7.21% |
| 2024-09-30 | $257.00M | $12.13B | $10.30B | (m) | $872.00M | 2.12% |
| 2024-06-30 | $426.00M | $12.12B | $10.21B | (m) | $863.00M | 3.51% |
| 2024-03-31 | $416.00M | $12.17B | $10.27B | (m) | $852.00M | 3.42% |
| 2023-12-31 | $729.00M | $12.55B | $10.33B | (m) | $865.00M | 5.81% |
| 2023-09-30 | $1.61B | $13.02B | $10.43B | (m) | $841.00M | 12.35% |
| 2023-06-30 | $1.77B | $13.86B | $11.09B | (m) | $850.00M | 12.80% |
| 2023-03-31 | $2.55B | $15.09B | $11.51B | (m) | $857.00M | 16.92% |
| 2022-12-31 | $3.05B | $15.79B | $11.72B | (m) | $835.00M | 19.31% |
| 2022-09-30 | $3.60B | $16.00B | $11.40B | (m) | $803.00M | 22.47% |
| 2022-06-30 | $3.94B | $15.10B | $10.26B | (m) | $710.00M | 26.10% |
| 2022-03-31 | $3.49B | $13.48B | $9.21B | (m) | $615.00M | 25.87% |
| 2021-12-31 | $2.80B | $11.78B | $8.28B | (m) | $551.00M | 23.77% |
| 2021-09-30 | $2.10B | $10.24B | $7.51B | (m) | $500.00M | 20.56% |
| 2021-06-30 | $1.32B | $9.08B | $7.13B | (m) | $486.00M | 14.57% |
| 2021-03-31 | $639.00M | $7.93B | $6.68B | (m) | $465.00M | 8.06% |
| 2020-12-31 | $429.00M | $7.50B | $6.48B | (m) | $449.00M | 5.72% |
| 2020-09-30 | $353.00M | $7.42B | $6.47B | (m) | $447.00M | 4.76% |
| 2020-06-30 | $500.00M | $7.59B | $6.52B | (m) | $449.00M | 6.59% |
| 2020-03-31 | $658.00M | $8.03B | $6.78B | (m) | $462.00M | 8.20% |
| 2019-12-31 | $656.00M | $8.12B | $6.86B | (m) | $458.00M | 8.08% |
| 2019-09-30 | $761.00M | $8.23B | $6.87B | (m) | $451.00M | 9.25% |
| 2019-06-30 | $931.00M | $8.42B | $6.89B | (m) | $455.00M | 11.06% |
| 2019-03-31 | $1.14B | $8.51B | $6.77B | (m) | $453.00M | 13.41% |
| 2018-12-31 | $1.41B | $8.63B | $6.65B | (m) | $445.00M | 16.31% |
| 2018-09-30 | $1.57B | (m) | (m) | (m) | $438.00M | (m) |
| 2018-06-30 | $1.54B | $8.50B | (m) | (m) | $422.00M | 18.11% |
| 2018-03-31 | $1.40B | $8.25B | (m) | (m) | $408.00M | 16.97% |
| 2017-12-31 | $1.23B | $8.04B | (m) | (m) | $399.00M | 15.33% |
| 2017-09-30 | $1.02B | (m) | (m) | (m) | $495.60M | (m) |
| 2017-06-30 | $701.65M | (m) | (m) | (m) | $442.69M | (m) |
| 2017-03-31 | $614.48M | (m) | (m) | (m) | $365.78M | (m) |
| 2016-12-31 | $581.45M | (m) | (m) | (m) | $295.44M | (m) |
| 2016-09-30 | $609.92M | (m) | (m) | (m) | $234.80M | (m) |
| 2016-06-30 | $817.39M | (m) | (m) | (m) | $227.03M | (m) |
| 2016-03-31 | $932.82M | (m) | (m) | (m) | $223.41M | (m) |
| 2015-12-31 | $959.83M | (m) | (m) | (m) | $225.36M | (m) |
| 2015-09-30 | $1.08B | (m) | (m) | (m) | $230.78M | (m) |
| 2015-06-30 | $1.13B | (m) | (m) | (m) | $228.29M | (m) |
| 2015-03-31 | $1.11B | (m) | (m) | (m) | $209.67M | (m) |
| 2014-12-31 | $1.12B | (m) | (m) | (m) | $193.36M | (m) |
| 2014-09-30 | $1.08B | (m) | (m) | (m) | $170.99M | (m) |
| 2014-06-30 | $1.04B | (m) | (m) | (m) | $154.10M | (m) |
| 2014-03-31 | $1.01B | (m) | (m) | (m) | $153.18M | (m) |
| 2013-12-31 | $953.46M | (m) | (m) | (m) | $147.97M | (m) |
| 2013-09-30 | $852.12M | $3.61B | (m) | (m) | $143.90M | 23.61% |
| 2013-06-30 | $728.03M | $3.43B | (m) | (m) | $135.69M | 21.25% |
| 2013-03-31 | $663.78M | $3.40B | (m) | (m) | $128.35M | 19.52% |
| 2012-12-31 | $615.35M | $3.57B | (m) | (m) | $121.61M | 17.23% |
| 2012-09-30 | $509.58M | $3.63B | (m) | (m) | $114.39M | 14.04% |
| 2012-06-30 | $484.39M | $3.78B | (m) | (m) | $114.47M | 12.83% |
| 2012-03-31 | $451.78M | $3.79B | (m) | (m) | $112.28M | 11.93% |
| 2011-12-31 | $446.80M | $3.62B | (m) | (m) | $112.21M | 12.34% |
| 2011-09-30 | (m) | (m) | (m) | (m) | (m) | (m) |
| 2011-06-30 | (m) | (m) | (m) | (m) | (m) | (m) |
| 2011-03-31 | $484.57M | $3.26B | (m) | (m) | (m) | 14.86% |
| 2010-12-31 | $378.36M | $3.17B | (m) | (m) | $104.32M | 11.93% |
| 2010-09-30 | (m) | (m) | (m) | (m) | (m) | (m) |
| 2010-06-30 | (m) | (m) | (m) | (m) | (m) | (m) |
| 2010-03-31 | (m) | (m) | (m) | (m) | (m) | (m) |
| 2009-12-31 | $107.26M | $2.33B | (m) | (m) | $87.87M | 4.61% |
(m) means missing inputs. Historical market-based ratios use the saved close on or immediately before period ending and that period’s reported shares; current quotes are not substituted. Five-year projections repeat historical CAGR, not analyst forecasts.
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