Quick Answer
WESTLAKE CORP reported Long-Term Debt of $5.09 billion for fiscal year 2025.
WESTLAKE CORP Long-Term Debt — Annual History
| Fiscal Year | Long-Term Debt | YoY Change |
|---|---|---|
| 2025 | $5.09B | +11.7% |
| 2024 | $4.56B | -1.1% |
| 2023 | $4.61B | -5.6% |
| 2022 | $4.88B | -0.7% |
| 2021 | $4.91B | +37.7% |
| 2020 | $3.57B | +3.5% |
| 2019 | $3.44B | +29.1% |
| 2018 | $2.67B | -14.7% |
| 2017 | $3.13B | -15.0% |
| 2016 | $3.68B | +385.2% |
| 2015 | $758.15M | -0.8% |
| 2014 | $764.00M | +0.0% |
| 2013 | $763.88M | +0.0% |
| 2012 | $763.76M | -0.1% |
| 2011 | $764.56M | +0.0% |
| 2010 | $764.48M | — |
Quarterly Long-Term Debt
| Quarter Ending | Long-Term Debt | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | $3.91B | -15.4% | -16.1% |
| June 30, 2025 | $4.65B | +1.5% | +1.4% |
| March 31, 2025 | $4.59B | -0.0% | +0.7% |
| December 31, 2024 | $4.56B | -1.1% | -1.3% |
| September 30, 2024 | $4.62B | +0.9% | +0.7% |
| June 30, 2024 | $4.58B | -6.3% | -0.1% |
| March 31, 2024 | $4.59B | -6.2% | -0.4% |
| December 31, 2023 | $4.61B | -5.6% | +0.7% |
- WESTLAKE CORP showed an increase of +11.7% in Long-Term Debt compared to the prior fiscal year.
- Over the 2010–2025 period, WESTLAKE CORP’s long-term debt has grown by 565.4% (from $764.48 million to $5.09 billion).
- The most recent figure is from WESTLAKE CORP’s fiscal year 2025 report (Form 10-K), filed with the SEC on February 26, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
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