White Mountains Insurance Group Ltd (WTM)
White Mountains Insurance Group Ltd brought in $3.6B of revenue over the twelve months to September 30, 2026, up 44.9% from a year earlier. Net income was $969.1M, a net margin of 26.9%. At September 30, 2026 it held $167.4M in cash against $928.6M of debt. Its latest periodic report to the SEC is the quarterly report (10-Q) filed on November 5, 2026.
Key facts about White Mountains Insurance Group Ltd
- Net worth
- White Mountains Insurance Group Ltd has a market value (market cap) of $5.4B at the latest share price, and shareholders' equity of $5.4B on its balance sheet at September 30, 2026. A company's "net worth" usually means one of these: what the market pays for all its shares, or its assets minus its liabilities.
- Revenue and profit
- In fiscal 2025 revenue was $3.7B (+66.8% year on year), with net income of $1.1B. Over the 12 months to September 30, 2026: revenue $3.6B, net income $969.1M.
- Cash flow
- In fiscal 2025 operations brought in $550.5M of cash.
- Latest report
- The latest periodic report (quarterly report, 10-Q) was filed with the SEC on November 5, 2026 and covers the period to September 30, 2026. Open on SEC EDGAR
- Next earnings report
- White Mountains Insurance Group Ltd's next report is expected around February 5, 2027. That is an estimate from its filing rhythm, not a date the company has announced.
- Dividend
- White Mountains Insurance Group Ltd declared dividends of $1.00 per share in fiscal 2025, a yield of 0.04% at the current price.
What White Mountains Insurance Group Ltd does
White Mountains Insurance Group Ltd is registered with the SEC under industry code SIC 6331 (Fire, Marine & Casualty Insurance). Its shares trade on NYSE under the ticker WTM.
Revenue and profit by year
Key figures
| Fiscal year | Revenue | Net income | Diluted EPS | Free cash flow |
|---|---|---|---|---|
| 2025 | $3.7B | $1.1B | $430.14 | n/a |
| 2024 | $2.2B | $230.4M | $89.79 | n/a |
| 2023 | $2.2B | $509.2M | $198.60 | n/a |
| 2022 | $1.2B | $792.8M | $276.96 | n/a |
| 2021 | $614.4M | -$275.4M | -$89.46 | n/a |
| 2020 | $895.6M | $708.7M | $226.97 | n/a |
Earnings: every quarter and the next report date
Full financial statements: income, balance sheet and cash flow
Where WTM ranks in Finance
Dividends
White Mountains Insurance Group Ltd declared $1.00 per share in fiscal 2025. At the current price that is a yield of 0.04%. It paid out $2.6M in cash dividends, 0% of its net income.
| Fiscal year | Per share | Paid out | Of profit |
|---|---|---|---|
| 2025 | $1.00 | $2.6M | 0% |
| 2024 | $1.00 | $2.5M | 1% |
| 2023 | $1.00 | $2.6M | 1% |
| 2022 | $1.00 | $3M | 0% |
| 2021 | $1.00 | $3.1M | n/a |
| 2020 | $1.00 | $3.2M | 0% |
Latest SEC filings
What White Mountains Insurance Group Ltd has filed recently, newest first. Each links to the original document on SEC EDGAR.
- November 5, 2026Activist stake changed SCHEDULE 13D/A
- November 5, 2026Quarterly report 10-Q · period to September 30, 2026Revenue fell 26% to $641.1M versus the same quarter last year; diluted EPS -$17.71 versus $44.18.
- November 5, 2026
- October 30, 2026Activist stake changed SCHEDULE 13D/A
- August 27, 2026
- August 26, 2026Form N-PX filing N-PX
- August 12, 2026Form 13F-HR filing 13F-HR
- August 6, 2026Quarterly report 10-Q · period to June 30, 2026Revenue rose 23% to $844.6M versus the same quarter last year; diluted EPS $80.58 versus $47.75.
- August 6, 2026
- June 30, 2026
Insider trades
What the people running White Mountains Insurance Group Ltd did with its shares, from the Form 4 filings they must send the SEC within two business days.
No insider bought or sold shares on the open market in the last 90 days. The 2 reported changes were pay in shares, option exercises, shares withheld for tax or gifts.
| Date | Insider | What | Shares | Value |
|---|---|---|---|---|
| August 31, 2026 | Tanner David AllenDirector | Gave as a gift | 2 | - |
| August 26, 2026 | Klar StephenDirector | Received as pay | 113 | - |
| May 21, 2026 | Campbell Reid TarltonDirector | Received as pay | 135 | - |
| May 21, 2026 | Carlson Peter MDirector | Received as pay | 135 | - |
| May 21, 2026 | Choksi Mary CDirector | Received as pay | 135 | - |
| May 21, 2026 | Chu JohnDirector | Received as pay | 135 | - |
| May 21, 2026 | Dillon MargaretDirector | Received as pay | 135 | - |
| May 21, 2026 | Gelston Philip ADirector | Received as pay | 135 | - |
Who owns WTM
Three views from three kinds of SEC filings, each with its own date. They overlap and are not added up.
5% holders
| Holder | Of class | Filed |
|---|---|---|
| White Mountains Insurance Group, Ltd.13D, may seek influence with 1 related filers | 33.03% | May 1, 2026 |
| Vanguard Capital Management13G, passive | 5.18% | April 30, 2026 |
Largest institutional holders
Positions that investment managers reported on Form 13F for the quarter ended June 30, 2026, largest first, with the change on the quarter ended March 31, 2026. Managers file 13F up to 45 days after a quarter ends. 356 managers reported a position.
| Holder | Shares | Change on quarter |
|---|---|---|
| Dimensional Fund Advisors LP | 158,954 | +2,336 |
| Neuberger Berman Group LLC | 119,141 | -5,574 |
| BlackRock, Inc. | 117,871 | +4,543 |
| River Road Asset Management, LLC | 115,880 | -4,639 |
| Vanguard Portfolio Management LLC | 111,969 | -3,584 |
| Vanguard Capital Management LLC | 107,479 | -1,678 |
| Fuller & Thaler Asset Management, Inc. | 101,892 | -2,669 |
| Cooke & Bieler LP | 85,120 | -19,737 |
| Wallace Capital Management Inc. | 80,067 | +1,272 |
| Fiduciary Management Inc | 66,550 | -18,516 |
| Gendell Jeffrey L | 59,243 | +21,429 |
| Boston Partners | 55,569 | -1,890 |
| London Co of Virginia | 54,025 | -3,106 |
| State Street Corp | 50,257 | +1,099 |
| Geode Capital Management, LLC | 49,412 | +7,293 |
| Morgan Stanley | 46,866 | -12,429 |
| Reinhart Partners, LLC. | 44,480 | +7,106 |
| American Century Companies Inc | 31,108 | +22,800 |
| Norges Bank | 27,956 | new |
| Cannell & Spears LLC | 27,577 | -450 |
Insiders
16 insiders reported holding 71,039 shares in total, about $160.3M at the last price.
| Holder | Shares |
|---|---|
| Seelig Robert LawrenceEVP & General Counsel | 20,357 |
| Rountree George ManningChief Executive Officer, Director | 13,809 |
| Campbell Reid TarltonDirector | 10,575 |
| Caffrey Liam PChief Executive Officer, Director | 5,305 |
| Hildreth MichaelaMD & Chief Accounting Officer | 4,316 |
| Hicks Weston MDirector | 2,936 |
| Harrison Giles EPresident | 2,675 |
| Tanner David AllenDirector | 2,012 |
| Choksi Mary CDirector | 1,993 |
| Papamichael Michael AChief Financial Officer | 1,972 |
Questions about WTM
What does White Mountains Insurance Group Ltd do?
White Mountains Insurance Group Ltd is a company in the Finance sector, listed on NYSE as WTM. Its shares trade on NYSE under the ticker WTM.
What is White Mountains Insurance Group Ltd's net worth?
White Mountains Insurance Group Ltd has a market value (market cap) of $5.4B at the latest share price, and shareholders' equity of $5.4B on its balance sheet at September 30, 2026. A company's "net worth" usually means one of these: what the market pays for all its shares, or its assets minus its liabilities.
Is White Mountains Insurance Group Ltd profitable?
Yes. Over the twelve months to September 30, 2026 it reported net income of $969.1M on revenue of $3.6B, a net margin of 26.9%.
How much revenue does White Mountains Insurance Group Ltd make?
Over the twelve months to September 30, 2026 White Mountains Insurance Group Ltd reported revenue of $3.6B. That is 44.9% more than a year earlier.
When did White Mountains Insurance Group Ltd last report?
Its most recent periodic report is the quarterly report (10-Q) filed on November 5, 2026. It covers the period to September 30, 2026.
When is White Mountains Insurance Group Ltd's next earnings report?
White Mountains Insurance Group Ltd's next report is expected around February 5, 2027. That is an estimate from its filing rhythm, not a date the company has announced.
Does White Mountains Insurance Group Ltd pay a dividend?
Yes. White Mountains Insurance Group Ltd declared dividends of $1.00 per share in fiscal 2025, a yield of 0.04% at the current price.
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Where the numbers come from
Financial figures are the values White Mountains Insurance Group Ltd tagged in its own SEC filings (XBRL), taken from the latest filing for each period, so restatements replace older figures. Revenue, profit and cash flow are for full fiscal years unless marked as the last twelve months, which is the sum of the four most recent quarters. Where a company reports only the full year, the fourth quarter is the year minus the first three.
Prices are delayed end-of-day market data in the listing currency, and market cap moves with the price. P/E is shown only when earnings per share are positive. Nothing here is investment advice.