Listed

White Mountains Insurance Group Ltd

WTMNYSECIK 776867FinancialsFiscal year ends Dec 31

Standardized line items from XBRL company facts, the last twelve quarters. Negative values are in parentheses. A figure marked d is derived from year-to-date figures.

Income statement

Revenue$844.6m, Q2 FY2026
Net income$199.5m, Q2 FY2026
White Mountains Insurance Group Ltd, income statement, quarterly
Line itemUnitQ3 FY20232023-09-30Q4 FY20232023-12-31Q1 FY20242024-03-31Q2 FY20242024-06-30Q3 FY20242024-09-30Q4 FY20242024-12-31Q1 FY20252025-03-31Q2 FY20252025-06-30Q3 FY20252025-09-30Q4 FY20252025-12-31Q1 FY20262026-03-31Q2 FY20262026-06-30
Revenue$m520Revenue, Q3 FY2023, three months to 2023-09-30$519.6m. XBRL concept us-gaap:Revenues. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure737Revenue, Q4 FY2023, three months to 2023-12-31$736.8m. XBRL concept us-gaap:Revenues. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure647Revenue, Q1 FY2024, three months to 2024-03-31$647.3m. XBRL concept us-gaap:Revenues. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure395Revenue, Q2 FY2024, three months to 2024-06-30$395.4m. XBRL concept us-gaap:Revenues. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure839Revenue, Q3 FY2024, three months to 2024-09-30$839.1m. XBRL concept us-gaap:Revenues. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure358Revenue, Q4 FY2024, three months to 2024-12-31$358.0m. XBRL concept us-gaap:Revenues. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure578Revenue, Q1 FY2025, three months to 2025-03-31$577.8m. XBRL concept us-gaap:Revenues. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure689Revenue, Q2 FY2025, three months to 2025-06-30$689.2m. XBRL concept us-gaap:Revenues. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure864Revenue, Q3 FY2025, three months to 2025-09-30$864.2m. XBRL concept us-gaap:Revenues. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure1,604Revenue, Q4 FY2025, three months to 2025-12-31$1.60bn. XBRL concept us-gaap:Revenues. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure518Revenue, Q1 FY2026, three months to 2026-03-31$517.8m. XBRL concept us-gaap:Revenues. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure845Revenue, Q2 FY2026, three months to 2026-06-30$844.6m. XBRL concept us-gaap:Revenues. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Cost of revenue$m8.0Cost of revenue, Q3 FY2023, three months to 2023-09-30$8.0m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure6.9Cost of revenue, Q4 FY2023, three months to 2023-12-31$6.9m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure7.6Cost of revenue, Q1 FY2024, three months to 2024-03-31$7.6m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure7.0Cost of revenue, Q2 FY2024, three months to 2024-06-30$7.0m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure7.6Cost of revenue, Q3 FY2024, three months to 2024-09-30$7.6m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure7.4Cost of revenue, Q4 FY2024, three months to 2024-12-31$7.4m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure7.5Cost of revenue, Q1 FY2025, three months to 2025-03-31$7.5m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure42.4Cost of revenue, Q2 FY2025, three months to 2025-06-30$42.4m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure55.3Cost of revenue, Q3 FY2025, three months to 2025-09-30$55.3m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure46.6Cost of revenue, Q4 FY2025, three months to 2025-12-31$46.6m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure42.7Cost of revenue, Q1 FY2026, three months to 2026-03-31$42.7m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure80.1Cost of revenue, Q2 FY2026, three months to 2026-06-30$80.1m. XBRL concept us-gaap:CostOfGoodsAndServicesSold. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Interest expense$m15.7Interest expense, Q3 FY2023, three months to 2023-09-30$15.7m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure17.8Interest expense, Q4 FY2023, three months to 2023-12-31$17.8m. XBRL concept us-gaap:InterestExpense. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure15.2Interest expense, Q1 FY2024, three months to 2024-03-31$15.2m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure14.8Interest expense, Q2 FY2024, three months to 2024-06-30$14.8m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure16.7Interest expense, Q3 FY2024, three months to 2024-09-30$16.7m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure14.1Interest expense, Q4 FY2024, three months to 2024-12-31$14.1m. XBRL concept us-gaap:InterestExpense. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure17.8Interest expense, Q1 FY2025, three months to 2025-03-31$17.8m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure18.6Interest expense, Q2 FY2025, three months to 2025-06-30$18.6m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure19.9Interest expense, Q3 FY2025, three months to 2025-09-30$19.9m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure22.1Interest expense, Q4 FY2025, three months to 2025-12-31$22.1m. XBRL concept us-gaap:InterestExpense. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure19.3Interest expense, Q1 FY2026, three months to 2026-03-31$19.3m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure19.8Interest expense, Q2 FY2026, three months to 2026-06-30$19.8m. XBRL concept us-gaap:InterestExpense. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Income tax$m7.3Income tax, Q3 FY2023, three months to 2023-09-30$7.3m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure(34.9)Income tax, Q4 FY2023, three months to 2023-12-31−$34.9m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure10.8Income tax, Q1 FY2024, three months to 2024-03-31$10.8m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure6.5Income tax, Q2 FY2024, three months to 2024-06-30$6.5m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure11.6Income tax, Q3 FY2024, three months to 2024-09-30$11.6m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure3.7Income tax, Q4 FY2024, three months to 2024-12-31$3.7m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure9.6Income tax, Q1 FY2025, three months to 2025-03-31$9.6m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure12.9Income tax, Q2 FY2025, three months to 2025-06-30$12.9m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure17.1Income tax, Q3 FY2025, three months to 2025-09-30$17.1m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure87.3Income tax, Q4 FY2025, three months to 2025-12-31$87.3m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure0.8Income tax, Q1 FY2026, three months to 2026-03-31$800.0k. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure24.8Income tax, Q2 FY2026, three months to 2026-06-30$24.8m. XBRL concept us-gaap:IncomeTaxExpenseBenefit. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Net income$m23.6Net income, Q3 FY2023, three months to 2023-09-30$23.6m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure287Net income, Q4 FY2023, three months to 2023-12-31$286.5m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure236Net income, Q1 FY2024, three months to 2024-03-31$236.4m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure(54.6)Net income, Q2 FY2024, three months to 2024-06-30−$54.6m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure179Net income, Q3 FY2024, three months to 2024-09-30$179.0m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure(130)Net income, Q4 FY2024, three months to 2024-12-31−$130.4m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure33.9Net income, Q1 FY2025, three months to 2025-03-31$33.9m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure123Net income, Q2 FY2025, three months to 2025-06-30$122.9m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure114Net income, Q3 FY2025, three months to 2025-09-30$113.8m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure836Net income, Q4 FY2025, three months to 2025-12-31$835.8m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure(27.2)Net income, Q1 FY2026, three months to 2026-03-31−$27.2m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure200Net income, Q2 FY2026, three months to 2026-06-30$199.5m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Diluted EPS$ per share9.19Diluted EPS, Q3 FY2023, three months to 2023-09-30$9.19 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figurenot reported92.33Diluted EPS, Q1 FY2024, three months to 2024-03-31$92.33 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure(21.24)Diluted EPS, Q2 FY2024, three months to 2024-06-30−$21.24 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure69.68Diluted EPS, Q3 FY2024, three months to 2024-09-30$69.68 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figurenot reported13.19Diluted EPS, Q1 FY2025, three months to 2025-03-31$13.19 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure47.75Diluted EPS, Q2 FY2025, three months to 2025-06-30$47.75 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure44.18Diluted EPS, Q3 FY2025, three months to 2025-09-30$44.18 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figurenot reported(12.59)Diluted EPS, Q1 FY2026, three months to 2026-03-31−$12.59 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure80.58Diluted EPS, Q2 FY2026, three months to 2026-06-30$80.58 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Basic EPS$ per share9.19Basic EPS, Q3 FY2023, three months to 2023-09-30$9.19 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figurenot reported92.33Basic EPS, Q1 FY2024, three months to 2024-03-31$92.33 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure(21.24)Basic EPS, Q2 FY2024, three months to 2024-06-30−$21.24 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure69.68Basic EPS, Q3 FY2024, three months to 2024-09-30$69.68 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figurenot reported13.19Basic EPS, Q1 FY2025, three months to 2025-03-31$13.19 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure47.75Basic EPS, Q2 FY2025, three months to 2025-06-30$47.75 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure44.18Basic EPS, Q3 FY2025, three months to 2025-09-30$44.18 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figurenot reported(12.59)Basic EPS, Q1 FY2026, three months to 2026-03-31−$12.59 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure80.58Basic EPS, Q2 FY2026, three months to 2026-06-30$80.58 per share. XBRL concept us-gaap:EarningsPerShareBasic. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure

Balance sheet

Long-term debt$932.5m, Q2 FY2026
Shareholders' equity$5.39bn, Q2 FY2026
White Mountains Insurance Group Ltd, balance sheet, quarterly
Line itemUnitQ3 FY20232023-09-30FY20232023-12-31Q1 FY20242024-03-31Q2 FY20242024-06-30Q3 FY20242024-09-30FY20242024-12-31Q1 FY20252025-03-31Q2 FY20252025-06-30Q3 FY20252025-09-30FY20252025-12-31Q1 FY20262026-03-31Q2 FY20262026-06-30
Cash and equivalents$bnnot reportednot reportednot reportednot reportednot reportednot reportednot reportednot reportednot reportednot reportednot reportednot reported
Total assets$bn8.1Total assets, Q3 FY2023, at 2023-09-30$8.14bn. XBRL concept us-gaap:Assets. 10-Q filed 2023-11-06, accession 0000776867-23-000017.Report this figure8.4Total assets, FY2023, at 2023-12-31$8.39bn. XBRL concept us-gaap:Assets. 10-K filed 2025-02-28, accession 0000776867-25-000003.Report this figure9.6Total assets, Q1 FY2024, at 2024-03-31$9.59bn. XBRL concept us-gaap:Assets. 10-Q filed 2024-05-09, accession 0000776867-24-000010.Report this figure10.2Total assets, Q2 FY2024, at 2024-06-30$10.17bn. XBRL concept us-gaap:Assets. 10-Q filed 2024-08-07, accession 0000776867-24-000015.Report this figure10.3Total assets, Q3 FY2024, at 2024-09-30$10.34bn. XBRL concept us-gaap:Assets. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure9.9Total assets, FY2024, at 2024-12-31$9.93bn. XBRL concept us-gaap:Assets. 10-K filed 2026-02-27, accession 0001628280-26-012603.Report this figure11.0Total assets, Q1 FY2025, at 2025-03-31$11.00bn. XBRL concept us-gaap:Assets. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure11.8Total assets, Q2 FY2025, at 2025-06-30$11.82bn. XBRL concept us-gaap:Assets. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure12.3Total assets, Q3 FY2025, at 2025-09-30$12.35bn. XBRL concept us-gaap:Assets. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure12.3Total assets, FY2025, at 2025-12-31$12.31bn. XBRL concept us-gaap:Assets. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure13.2Total assets, Q1 FY2026, at 2026-03-31$13.17bn. XBRL concept us-gaap:Assets. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure13.8Total assets, Q2 FY2026, at 2026-06-30$13.77bn. XBRL concept us-gaap:Assets. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Total liabilities$bn4.0Total liabilities, Q3 FY2023, at 2023-09-30$3.98bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2023-11-06, accession 0000776867-23-000017.Report this figure3.8Total liabilities, FY2023, at 2023-12-31$3.82bn. XBRL concept us-gaap:Liabilities. 10-K filed 2025-02-28, accession 0000776867-25-000003.Report this figure4.7Total liabilities, Q1 FY2024, at 2024-03-31$4.70bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2024-05-09, accession 0000776867-24-000010.Report this figure5.3Total liabilities, Q2 FY2024, at 2024-06-30$5.29bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2024-08-07, accession 0000776867-24-000015.Report this figure5.1Total liabilities, Q3 FY2024, at 2024-09-30$5.08bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure4.8Total liabilities, FY2024, at 2024-12-31$4.79bn. XBRL concept us-gaap:Liabilities. 10-K filed 2026-02-27, accession 0001628280-26-012603.Report this figure5.9Total liabilities, Q1 FY2025, at 2025-03-31$5.87bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure6.5Total liabilities, Q2 FY2025, at 2025-06-30$6.48bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure6.6Total liabilities, Q3 FY2025, at 2025-09-30$6.63bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure6.1Total liabilities, FY2025, at 2025-12-31$6.05bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure7.0Total liabilities, Q1 FY2026, at 2026-03-31$6.99bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure7.5Total liabilities, Q2 FY2026, at 2026-06-30$7.51bn. XBRL concept us-gaap:Liabilities. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Long-term debt$bn0.6Long-term debt, Q3 FY2023, at 2023-09-30$564.7m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2023-11-06, accession 0000776867-23-000017.Report this figure0.6Long-term debt, FY2023, at 2023-12-31$564.6m. XBRL concept us-gaap:LongTermDebt. 10-K filed 2025-02-28, accession 0000776867-25-000003.Report this figure0.5Long-term debt, Q1 FY2024, at 2024-03-31$532.1m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2024-05-09, accession 0000776867-24-000010.Report this figure0.5Long-term debt, Q2 FY2024, at 2024-06-30$530.2m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2024-08-07, accession 0000776867-24-000015.Report this figure0.5Long-term debt, Q3 FY2024, at 2024-09-30$544.9m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure0.6Long-term debt, FY2024, at 2024-12-31$562.5m. XBRL concept us-gaap:LongTermDebt. 10-K filed 2026-02-27, accession 0001628280-26-012603.Report this figure0.7Long-term debt, Q1 FY2025, at 2025-03-31$676.1m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure0.7Long-term debt, Q2 FY2025, at 2025-06-30$694.6m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure0.9Long-term debt, Q3 FY2025, at 2025-09-30$870.4m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure0.8Long-term debt, FY2025, at 2025-12-31$837.0m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure0.8Long-term debt, Q1 FY2026, at 2026-03-31$834.8m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure0.9Long-term debt, Q2 FY2026, at 2026-06-30$932.5m. XBRL concept us-gaap:LongTermDebt. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure
Shareholders' equity$bn3.9Shareholders' equity, Q3 FY2023, at 2023-09-30$3.95bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2023-11-06, accession 0000776867-23-000017.Report this figure4.2Shareholders' equity, FY2023, at 2023-12-31$4.24bn. XBRL concept us-gaap:StockholdersEquity. 10-K filed 2025-02-28, accession 0000776867-25-000003.Report this figure4.5Shareholders' equity, Q1 FY2024, at 2024-03-31$4.47bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2024-05-09, accession 0000776867-24-000010.Report this figure4.4Shareholders' equity, Q2 FY2024, at 2024-06-30$4.42bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2024-08-07, accession 0000776867-24-000015.Report this figure4.6Shareholders' equity, Q3 FY2024, at 2024-09-30$4.61bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure4.5Shareholders' equity, FY2024, at 2024-12-31$4.48bn. XBRL concept us-gaap:StockholdersEquity. 10-K filed 2026-02-27, accession 0001628280-26-012603.Report this figure4.5Shareholders' equity, Q1 FY2025, at 2025-03-31$4.51bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure4.6Shareholders' equity, Q2 FY2025, at 2025-06-30$4.64bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure4.8Shareholders' equity, Q3 FY2025, at 2025-09-30$4.77bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure5.4Shareholders' equity, FY2025, at 2025-12-31$5.43bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure5.4Shareholders' equity, Q1 FY2026, at 2026-03-31$5.37bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure5.4Shareholders' equity, Q2 FY2026, at 2026-06-30$5.39bn. XBRL concept us-gaap:StockholdersEquity. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure

Cash flow

Operating cash flow−$55.5m, Q2 FY2026
Share repurchases$190.9m, Q2 FY2026
White Mountains Insurance Group Ltd, cash flow, quarterly
Line itemUnitQ3 FY20232023-09-30Q4 FY20232023-12-31Q1 FY20242024-03-31Q2 FY20242024-06-30Q3 FY20242024-09-30Q4 FY20242024-12-31Q1 FY20252025-03-31Q2 FY20252025-06-30Q3 FY20252025-09-30Q4 FY20252025-12-31Q1 FY20262026-03-31Q2 FY20262026-06-30
Operating cash flow$m223Operating cash flow, Q3 FY2023, three months to 2023-09-30$222.9m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2024-11-06, accession 0000776867-24-000019. Derived: 9-month figure less the 6-month figure.Report this figure24.5Operating cash flow, Q4 FY2023, three months to 2023-12-31$24.5m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure36.5Operating cash flow, Q1 FY2024, three months to 2024-03-31$36.5m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure217Operating cash flow, Q2 FY2024, three months to 2024-06-30$216.8m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-08-07, accession 0000776867-25-000014. Derived: 6-month figure less the 3-month figure.Report this figure269Operating cash flow, Q3 FY2024, three months to 2024-09-30$269.4m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-11-06, accession 0001628280-25-049910. Derived: 9-month figure less the 6-month figure.Report this figure64.1Operating cash flow, Q4 FY2024, three months to 2024-12-31$64.1m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure(40.2)Operating cash flow, Q1 FY2025, three months to 2025-03-31−$40.2m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure178Operating cash flow, Q2 FY2025, three months to 2025-06-30$177.5m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-08-06, accession 0001628280-26-053932. Derived: 6-month figure less the 3-month figure.Report this figure359Operating cash flow, Q3 FY2025, three months to 2025-09-30$359.3m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-11-06, accession 0001628280-25-049910. Derived: 9-month figure less the 6-month figure.Report this figure53.9Operating cash flow, Q4 FY2025, three months to 2025-12-31$53.9m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure30.5Operating cash flow, Q1 FY2026, three months to 2026-03-31$30.5m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure(55.5)Operating cash flow, Q2 FY2026, three months to 2026-06-30−$55.5m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-08-06, accession 0001628280-26-053932. Derived: 6-month figure less the 3-month figure.Report this figure
Dividends paid$m0.0Dividends paid, Q3 FY2023, three months to 2023-09-30$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2024-11-06, accession 0000776867-24-000019. Derived: 9-month figure less the 6-month figure.Report this figure0.0Dividends paid, Q4 FY2023, three months to 2023-12-31$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure2.5Dividends paid, Q1 FY2024, three months to 2024-03-31$2.5m. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure0.0Dividends paid, Q2 FY2024, three months to 2024-06-30$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2025-08-07, accession 0000776867-25-000014. Derived: 6-month figure less the 3-month figure.Report this figure0.0Dividends paid, Q3 FY2024, three months to 2024-09-30$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2025-11-06, accession 0001628280-25-049910. Derived: 9-month figure less the 6-month figure.Report this figure0.0Dividends paid, Q4 FY2024, three months to 2024-12-31$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure2.6Dividends paid, Q1 FY2025, three months to 2025-03-31$2.6m. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure0.0Dividends paid, Q2 FY2025, three months to 2025-06-30$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2026-08-06, accession 0001628280-26-053932. Derived: 6-month figure less the 3-month figure.Report this figure0.0Dividends paid, Q3 FY2025, three months to 2025-09-30$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2025-11-06, accession 0001628280-25-049910. Derived: 9-month figure less the 6-month figure.Report this figure0.0Dividends paid, Q4 FY2025, three months to 2025-12-31$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure2.4Dividends paid, Q1 FY2026, three months to 2026-03-31$2.4m. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure0.0Dividends paid, Q2 FY2026, three months to 2026-06-30$0. XBRL concept us-gaap:PaymentsOfDividendsCommonStock. 10-Q filed 2026-08-06, accession 0001628280-26-053932. Derived: 6-month figure less the 3-month figure.Report this figure
Share repurchases$m0.0Share repurchases, Q3 FY2023, three months to 2023-09-30$0. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2024-11-06, accession 0000776867-24-000019. Derived: 9-month figure less the 6-month figure.Report this figure0.0Share repurchases, Q4 FY2023, three months to 2023-12-31$0. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure8.1Share repurchases, Q1 FY2024, three months to 2024-03-31$8.1m. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure0.0Share repurchases, Q2 FY2024, three months to 2024-06-30$0. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2025-08-07, accession 0000776867-25-000014. Derived: 6-month figure less the 3-month figure.Report this figure0.0Share repurchases, Q3 FY2024, three months to 2024-09-30$0. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2025-11-06, accession 0001628280-25-049910. Derived: 9-month figure less the 6-month figure.Report this figure(0.2)Share repurchases, Q4 FY2024, three months to 2024-12-31−$200.0k. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure9.9Share repurchases, Q1 FY2025, three months to 2025-03-31$9.9m. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure0.0Share repurchases, Q2 FY2025, three months to 2025-06-30$0. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2026-08-06, accession 0001628280-26-053932. Derived: 6-month figure less the 3-month figure.Report this figure0.0Share repurchases, Q3 FY2025, three months to 2025-09-30$0. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2025-11-06, accession 0001628280-25-049910. Derived: 9-month figure less the 6-month figure.Report this figure193Share repurchases, Q4 FY2025, three months to 2025-12-31$192.7m. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-K filed 2026-02-27, accession 0001628280-26-012603. Derived: 12-month figure less the 9-month figure.Report this figure25.9Share repurchases, Q1 FY2026, three months to 2026-03-31$25.9m. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure191Share repurchases, Q2 FY2026, three months to 2026-06-30$190.9m. XBRL concept us-gaap:PaymentsForRepurchaseOfCommonStock. 10-Q filed 2026-08-06, accession 0001628280-26-053932. Derived: 6-month figure less the 3-month figure.Report this figure

Shares

Diluted shares (weighted)2.41m, Q2 FY2026
White Mountains Insurance Group Ltd, shares, quarterly
Line itemUnitQ3 FY20222022-09-30Q1 FY20232023-03-31Q2 FY20232023-06-30Q3 FY20232023-09-30Q1 FY20242024-03-31Q2 FY20242024-06-30Q3 FY20242024-09-30Q1 FY20252025-03-31Q2 FY20252025-06-30Q3 FY20252025-09-30Q1 FY20262026-03-31Q2 FY20262026-06-30
Diluted shares (weighted)k shares2,856Diluted shares (weighted), Q3 FY2022, three months to 2022-09-302,855,500 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2023-11-06, accession 0000776867-23-000017.Report this figure2,539Diluted shares (weighted), Q1 FY2023, three months to 2023-03-312,538,800 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2024-05-09, accession 0000776867-24-000010.Report this figure2,525Diluted shares (weighted), Q2 FY2023, three months to 2023-06-302,524,800 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2024-08-07, accession 0000776867-24-000015.Report this figure2,523Diluted shares (weighted), Q3 FY2023, three months to 2023-09-302,522,900 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2024-11-06, accession 0000776867-24-000019.Report this figure2,531Diluted shares (weighted), Q1 FY2024, three months to 2024-03-312,531,100 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2025-05-07, accession 0000776867-25-000006.Report this figure2,532Diluted shares (weighted), Q2 FY2024, three months to 2024-06-302,531,800 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2025-08-07, accession 0000776867-25-000014.Report this figure2,533Diluted shares (weighted), Q3 FY2024, three months to 2024-09-302,532,700 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure2,541Diluted shares (weighted), Q1 FY2025, three months to 2025-03-312,540,900 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure2,541Diluted shares (weighted), Q2 FY2025, three months to 2025-06-302,541,400 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure2,542Diluted shares (weighted), Q3 FY2025, three months to 2025-09-302,542,300 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2025-11-06, accession 0001628280-25-049910.Report this figure2,447Diluted shares (weighted), Q1 FY2026, three months to 2026-03-312,447,300 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2026-05-06, accession 0001628280-26-030935.Report this figure2,408Diluted shares (weighted), Q2 FY2026, three months to 2026-06-302,407,600 shares. XBRL concept us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure

Shares outstanding: 2.39mShares outstanding, period not labelled, at 2026-08-032,386,721 shares. XBRL concept dei:EntityCommonStockSharesOutstanding. 10-Q filed 2026-08-06, accession 0001628280-26-053932.Report this figure at Aug 3, 2026, from the cover of the 10-Q filed Aug 6, 2026.

Source: SEC EDGAR, XBRL company facts. Last ingested by Listed: Oct 24, 2026, 15:24 ET. Listed shows no prices and gives no investment advice.