| Income Statement | 2025-09-30 | 2025-06-30 | 2025-03-31 | 2024-09-30 |
|---|---|---|---|---|
| Loss and loss adjustment expenses-Operating Segments-Ark Insurance Holdings Limited WMOutrigger Re Segment | - | 164,000 | - | - |
| Broker commission expenses-Operating Segments-Bamboo Ide8Insurance Services LLCSegment | - | 19,800 | - | - |
| Loss and loss adjustment expenses-Operating Segments-Bamboo Ide8Insurance Services LLCSegment | - | 1,700 | - | - |
| Loss and loss adjustment expenses-Corporate Non Segment | - | 800 | - | - |
| Interest expense-Operating Segments-Kudu Investment Management LLCSegment | - | 6,100 | - | - |
| Interest expense-Operating Segments-HGGlobal BAMSegment | - | 4,500 | - | - |
| Interest expense-Operating Segments-Bamboo Ide8Insurance Services LLCSegment | - | 2,900 | - | - |
| Interest expense-Operating Segments-Ark Insurance Holdings Limited WMOutrigger Re Segment | - | 4,300 | - | - |
| General and administrative expenses-Operating Segments-Kudu Investment Management LLCSegment | - | 3,600 | - | - |
| General and administrative expenses-Operating Segments-HGGlobal BAMSegment | - | 1,000 | - | - |
| General and administrative expenses-Operating Segments-Bamboo Ide8Insurance Services LLCSegment | - | 22,600 | - | - |
| General and administrative expenses-Operating Segments-Ark Insurance Holdings Limited WMOutrigger Re Segment | - | 56,500 | - | - |
| General and administrative expenses-Corporate Non Segment | - | 53,800 | - | - |
| Acquisition expenses-Operating Segments-HGGlobal BAMSegment | - | 2,000 | - | - |
| Acquisition expenses-Operating Segments-Bamboo Ide8Insurance Services LLCSegment | - | -600 | - | - |
| Acquisition expenses-Operating Segments-Ark Insurance Holdings Limited WMOutrigger Re Segment | - | 97,200 | - | - |
| Acquisition expenses-Corporate Non Segment | - | 900 | - | - |
| Cost of sales-Corporate Non Segment | - | 42,400 | - | - |
| Change in fair value of contingent consideration-Operating Segments-Ark Insurance Holdings Limited WMOutrigger Re Segment | - | 28,400 | - | - |
| Total expenses | 685,400 | 512,700 | 505,400 | 599,600 |
| Pre-tax income (loss) | 178,800 | 176,500 | 72,400 | 239,500 |
| Income tax (expense) benefit | 17,100 | 12,900 | 9,600 | 11,600 |
| Net income (loss) | 161,700 | 163,600 | 62,800 | 227,900 |
| Net (income) loss attributable to noncontrolling interests | 47,900 | 40,700 | 28,900 | 48,900 |
| Net income (loss) attributable to white mountainss common shareholders | 113,800 | 122,900 | 33,900 | 179,000 |
| Basic earnings (loss) per share (in dollars per share) | 44.18 | 47.75 | 13.19 | 69.68 |
| Basic earnings (losses) per share denominator (in shares) | 2,542,300 | 2,541,400 | 2,540,900 | 2,532,700 |
| Diluted earnings (loss) per share (in dollars per share) | 44.18 | 47.75 | 13.19 | 69.68 |
| Diluted earnings (losses) per share denominator (in shares) | 2,542,300 | 2,541,400 | 2,540,900 | 2,532,700 |
WHITE MOUNTAINS INSURANCE GROUP LTD (WTM)
WHITE MOUNTAINS INSURANCE GROUP LTD (WTM)