Business Context and Reporting Period
Company: White Mountains Insurance Group, Ltd.
Filing Type: Form 8-K (Current Report)
Date of Report: August 6, 2026
Reporting Period: Results for the three and six months ended June 30, 2026.
Context: The filing announces the release of financial results and details the reconciliation of various non-GAAP financial measures used to evaluate specific business segments (Ark, Kudu, Distinguished, WTM Partners) and the consolidated investment portfolio.
Key Financial Metrics
The filing focuses on non-GAAP reconciliations rather than full GAAP income statement figures. Key metrics provided include:
- Ark Tangible Book Value (June 30, 2026): $1,736.4 million (up from $1,636.8 million in Q1 2026).
- Ark GAAP Book Value (June 30, 2026): $1,615.0 million.
- Ark Growth Metrics (Q2 2026):
- GAAP book value growth (including dividends): 4.4%.
- Tangible book value growth (including dividends): 6.1%.
- Ark Year-to-Date Growth (including dividends):
- GAAP book value: 4.5%.
- Tangible book value: 6.8%.
- Dividends Declared (Year-to-Date): $50.5 million.
- Investment Portfolio Returns (Three Months Ended June 30, 2026):
- Total consolidated portfolio return: 3.5%.
- Total consolidated portfolio return excluding MediaAlpha: 2.8%.
- Total equity portfolio return: 6.1%.
- Total equity portfolio return excluding MediaAlpha: 4.9%.
Note: Specific GAAP revenue, net income, cash flow, debt, and liquidity figures for the consolidated entity are not provided in this text; they are referenced as being contained in the attached press release (Exhibit 99.1).
Material Changes vs. Prior Period
- Ark Book Value: Tangible book value increased by approximately $99.6 million quarter-over-quarter (from $1,636.8 million to $1,736.4 million).
- Investment Returns:
- Three-month total consolidated portfolio return increased to 3.5% from 2.7% in the same period in 2025.
- Three-month total consolidated portfolio return excluding MediaAlpha increased to 2.8% from 2.3% in the same period in 2025.
- Six-month total consolidated portfolio return decreased to 3.7% from 4.5% in the same period in 2025.
- Contingent Consideration: The liability associated with contingent consideration for Ark increased to $370.0 million from $338.3 million in the prior quarter.
Guidance, Outlook, and Non-GAAP Measures
The filing does not contain forward-looking guidance or management commentary on future outlook. Instead, it defines and reconciles 14 non-GAAP financial measures intended to provide insight into underlying performance:
- Ark: Tangible book value and growth in tangible book value (excludes goodwill, intangibles, and contingent consideration liability).
- Kudu: EBITDA, adjusted EBITDA, annualized adjusted EBITDA, annualized revenue, and cash revenue yield. Adjustments exclude investment gains/losses on participation contracts, non-cash equity compensation, and transaction expenses.
- Distinguished: ScaleCo net income, EBITDA, and adjusted EBITDA. These exclude the "GrowthCo" vertical (start-up programs) and adjust for non-cash equity compensation, restructuring, and legal settlement expenses.
- WTM Partners: EBITDA and adjusted EBITDA, adjusting for transaction and restructuring/integration expenses.
- Portfolio Returns: Measures excluding the impact of the MediaAlpha investment to show underlying portfolio performance.
Investor Verification Checklist
- Review Exhibit 99.1 (Press Release) for the full GAAP financial statements, including revenue, net income, and cash flow details not present in this 8-K text.
- Verify the specific components of the MediaAlpha investment impact, as its exclusion significantly alters reported portfolio returns.
- Examine the contingent consideration liability for Ark ($370.0 million) to understand potential future share dilution if performance thresholds are met.
- Confirm the reconciliation details for Kudu and Distinguished non-GAAP measures (pages 18 and 21 of Exhibit 99.1) to assess the magnitude of excluded items like transaction expenses and restructuring costs.
- Check the annualized revenue and EBITDA calculations for Kudu to ensure understanding of how partial-year acquisitions and divestitures are normalized.