Quick Answer
WHITE MOUNTAINS INSURANCE GROUP LTD reported Long-Term Debt of $837.00 million for fiscal year 2025.
WHITE MOUNTAINS INSURANCE GROUP LTD Long-Term Debt — Annual History
| Fiscal Year | Long-Term Debt | YoY Change |
|---|---|---|
| 2025 | $837.00M | +48.8% |
| 2024 | $562.50M | -0.4% |
| 2023 | $564.60M | -1.8% |
| 2022 | $575.20M | +36.7% |
| 2021 | $420.90M | +11.8% |
| 2020 | $376.40M | +32.8% |
| 2019 | $283.50M | +47.1% |
| 2018 | $192.70M | +709.7% |
| 2017 | $23.80M | +87.4% |
| 2016 | $12.70M | -96.2% |
| 2015 | $337.60M | -1.6% |
| 2014 | $343.10M | -49.3% |
| 2013 | $676.40M | -10.0% |
| 2012 | $751.20M | +10.9% |
| 2011 | $677.50M | -17.3% |
| 2010 | $818.80M | — |
Quarterly Long-Term Debt
| Quarter Ending | Long-Term Debt | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | $870.40M | +59.7% | +25.3% |
| June 30, 2025 | $694.60M | +31.0% | +2.7% |
| March 31, 2025 | $676.10M | +27.1% | +20.2% |
| December 31, 2024 | $562.50M | -0.4% | +3.2% |
| September 30, 2024 | $544.90M | -3.5% | +2.8% |
| June 30, 2024 | $530.20M | -6.3% | -0.4% |
| March 31, 2024 | $532.10M | -4.4% | -5.8% |
| December 31, 2023 | $564.60M | -1.8% | -0.0% |
- WHITE MOUNTAINS INSURANCE GROUP LTD showed an increase of +48.8% in Long-Term Debt compared to the prior fiscal year.
- Over the 2010–2025 period, WHITE MOUNTAINS INSURANCE GROUP LTD’s long-term debt has grown by 2.2% (from $818.80 million to $837.00 million).
- The most recent figure is from WHITE MOUNTAINS INSURANCE GROUP LTD’s fiscal year 2025 report (Form 10-K), filed with the SEC on February 27, 2026.
- All figures are sourced from SEC EDGAR XBRL filings, last verified June 17, 2026.
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