White Mountains Insurance Group (WTM)
Builds and supports insurance, reinsurance, and financial-services businesses.
Something off on this page? Send us feedback.
Owns and supports specialty-insurance, reinsurance, asset-management-related, and adjacent financial-services businesses. Flexible capital, management autonomy, and a history of acquisitions and disposals define its portfolio approach.
Owns and supports specialty-insurance, reinsurance, asset-management-related, and adjacent financial-services businesses. Its stated approach is to take control positions, back autonomous management teams with flexible capital, and provide operating and M&A resources.
Current and recent platforms include Ark, Kudu, Bamboo, and Distinguished Programs, alongside other operating businesses. Its history spans insurers, reinsurers, brokerages, financial guarantors, service companies, investment advisers, and insurance-linked consumer, media, and technology businesses.
Bermuda domicile and a Hanover, New Hampshire principal executive office frame a portfolio built through acquisitions, operating support, and selected disposals. Long-term ownership without predetermined exit dates coexists with portfolio recycling, including a retained minority interest after the Bamboo control sale.
Company facts
No analyst consensus on record.
EPSReportedEstimate
RevenueReportedEstimate
Balance sheet, Jun 30, 2026Cash & short-term investments $1.79B · Total debt $932.5M · Total assets $13.77B · Shareholders' equity $5.39B
- Revenue
- $844.6M
- Operating income
- $256.0M
- Net income
- $199.5M
HistoryDividendAnnual yield
| Institutions | 93.28% | 2.23M shares | |
|---|---|---|---|
| 359 holders · as of Jun 30, 2026 | |||
| Insiders | 2.69% | 64.2K shares | |
| 17 holders · as of Aug 31, 2026 | |||
| Other | 4.03% | 96.2K shares | |
| remainder | |||
2.39M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
Top shareholders13F · 13D/G · Form 4
| Holder | Stake | Shares | Date |
|---|---|---|---|
Eaton Vance ManagementInstitution | 9.12% | 217,748 | filed Feb 12, 2021 |
Dimensional Fund Advisors LPInstitution | 6.66% | 158,954 | as of Jun 30, 2026 |
Neuberger Berman Group LLCInstitution | 4.99% | 119,141 | as of Jun 30, 2026 |
BlackRock, Inc.Institution | 4.94% | 117,871 | as of Jun 30, 2026 |
River Road Asset Management, LLCInstitution | 4.86% | 115,880 | as of Jun 30, 2026 |
Insider tradesForm 4
| Date | Insider | Role | Shares | Avg price |
|---|---|---|---|---|
| Dec 19, 2025 | George Manning Rountree | director, officer: Chief Executive Officer | −5,000 | $2,050.00 |
| Dec 19, 2025 | Reid Tarlton Campbell | director | −10,000 | $2,050.00 |
| Dec 16, 2025 | Philip A. Gelston | director | −165 | $2,048.51 |
- Arch Capital Group
Broad overlap in global specialty insurance and reinsurance
- RenaissanceRe
Direct overlap in property, casualty, and specialty reinsurance
- Markel Group
Specialty insurance rival with a diversified ownership model
- Affiliated Managers Group
Capital partner to independent asset and wealth managers
- Assured Guaranty
Direct rival in U.S. municipal bond insurance and reinsurance
- Ryan Specialty
Specialty MGA, program administration, and distribution rival
Compare
| Company | Price | Change | |||||
|---|---|---|---|---|---|---|---|
| White Mountains Insurance Group | $2,059.33 | +0.28% | $5.09B | 4.7 | — | 1.8 | +22.6% |
| Arch Capital Group | $95.68 | +0.77% | $33.17B | 7.4 | 10.1 | 1.7 | −22.3% |
| RenaissanceRe | $330.83 | +1.51% | $13.54B | 5.6 | 8.3 | 1.3 | −28.5% |
| Markel Group | $1,763.85 | +0.03% | $21.85B | 9.7 | 15.4 | 1.3 | +17.6% |
| Affiliated Managers Group | $365.04 | +1.32% | $9.52B | 12.5 | 9.2 | 3.8 | +29.9% |
| Assured Guaranty | $70.68 | −0.09% | $3.13B | 9.7 | 10.5 | 3.6 | −2.0% |
| Ryan Specialty | $37.53 | −2.37% | $4.98B | 49.4 | 16.5 | 1.5 | +7.2% |
| Median | 9.7 | 10.3 | 1.6 | +2.6% |