Quick Answer
WHITE MOUNTAINS INSURANCE GROUP LTD reported Shares Outstanding of 2.48 million shares for fiscal year 2025.
WHITE MOUNTAINS INSURANCE GROUP LTD Shares Outstanding — Annual History
| Fiscal Year | Shares Outstanding | YoY Change |
|---|---|---|
| 2025 | 2.48M | -3.4% |
| 2024 | 2.57M | +0.3% |
| 2023 | 2.56M | -0.5% |
| 2022 | 2.57M | -14.8% |
| 2021 | 3.02M | -2.7% |
| 2020 | 3.10M | -2.6% |
| 2019 | 3.19M | +0.4% |
| 2018 | 3.17M | -15.4% |
| 2017 | 3.75M | -17.8% |
| 2016 | 4.56M | -18.8% |
| 2015 | 5.62M | -6.1% |
| 2014 | 5.99M | -3.1% |
| 2013 | 6.18M | -1.8% |
| 2012 | 6.29M | -17.0% |
| 2011 | 7.58M | -7.5% |
| 2010 | 8.19M | -7.5% |
| 2009 | 8.86M | — |
Quarterly Shares Outstanding
| Quarter Ending | Shares Outstanding | YoY | QoQ |
|---|---|---|---|
| September 30, 2025 | 2.58M | +0.3% | +0.0% |
| June 30, 2025 | 2.58M | +0.3% | +0.1% |
| March 31, 2025 | 2.57M | +0.3% | +0.2% |
| December 31, 2024 | 2.57M | +0.3% | +0.0% |
| September 30, 2024 | 2.57M | +0.3% | -0.0% |
| June 30, 2024 | 2.57M | +0.3% | +0.1% |
| March 31, 2024 | 2.57M | +0.0% | +0.2% |
| December 31, 2023 | 2.56M | -0.5% | +0.0% |
- WHITE MOUNTAINS INSURANCE GROUP LTD showed a decrease of -3.4% in Shares Outstanding compared to the prior fiscal year.
- Over the 2009–2025 period, WHITE MOUNTAINS INSURANCE GROUP LTD’s shares outstanding has declined by 72.0% (from 8.86 million shares to 2.48 million shares).
- 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.
Last verified: