Quick Answer
WHITE MOUNTAINS INSURANCE GROUP LTD reported Total Assets of $12.31 billion for fiscal year 2025.
WHITE MOUNTAINS INSURANCE GROUP LTD Total Assets — Annual History
| Fiscal Year | Total Assets | YoY Change |
|---|---|---|
| 2025 | $12.31B | +24.0% |
| 2024 | $9.93B | +18.4% |
| 2023 | $8.39B | +13.5% |
| 2022 | $7.39B | +5.6% |
| 2021 | $7.00B | +44.9% |
| 2020 | $4.83B | +21.3% |
| 2019 | $3.98B | +18.5% |
| 2018 | $3.36B | -8.1% |
| 2017 | $3.66B | -43.9% |
| 2016 | $6.52B | -36.6% |
| 2015 | $10.28B | -1.7% |
| 2014 | $10.46B | -13.9% |
| 2013 | $12.14B | -5.8% |
| 2012 | $12.90B | -8.3% |
| 2011 | $14.06B | -3.2% |
| 2010 | $14.53B | -5.9% |
| 2009 | $15.44B | — |
Quarterly Total Assets
| Quarter Ending | Total Assets | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | $12.35B | +19.4% | +4.4% |
| June 30, 2025 | $11.82B | +16.3% | +7.4% |
| March 31, 2025 | $11.00B | +14.8% | +10.9% |
| December 31, 2024 | $9.93B | +18.4% | -4.0% |
| September 30, 2024 | $10.34B | +27.0% | +1.7% |
| June 30, 2024 | $10.17B | +21.4% | +6.0% |
| March 31, 2024 | $9.59B | +20.5% | +14.4% |
| December 31, 2023 | $8.39B | +13.5% | +3.0% |
- WHITE MOUNTAINS INSURANCE GROUP LTD showed an increase of +24.0% in Total Assets compared to the prior fiscal year.
- Over the 2009–2025 period, WHITE MOUNTAINS INSURANCE GROUP LTD’s total assets has declined by 20.3% (from $15.44 billion to $12.31 billion).
- 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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