SEC Filing Summary: Form 13F Information Table
Business Context and Reporting Period
Company: WHITE MOUNTAINS INSURANCE GROUP LTD
Filing Type: Form 13F Information Table
Reporting Period: The filing metadata indicates a date of June 30, 2026. However, the document text itself does not explicitly state the reporting period end date within the visible content.
Context: This filing discloses the equity securities held by the reporting manager as of the end of the reporting period. It is a regulatory disclosure of investment holdings, not a financial performance report.
Key Financial Metrics and Holdings
The filing does not contain revenue, profit, cash flow, margins, debt, or liquidity metrics for White Mountains Insurance Group Ltd. Instead, it lists specific equity positions held by the manager:
| Issuer Name | Title of Class | Value (USD) | Shares/Amount | Voting Authority |
|---|---|---|---|---|
| MEDIAALPHA INC | CL A | $224,457,638 | 17,856,614 | Sole |
| SPDR S&P 500 ETF TR | TR UNIT | $169,143,405 | 226,500 | Sole |
Total Disclosed Value in Snippet: $393,601,043 (Sum of listed positions only; total portfolio value is not provided in the text).
Material Changes
The filing text provided does not contain comparative data from a prior period. Therefore, material changes in holdings versus the prior comparable period cannot be determined from this content.
Guidance, Outlook, and Risks
Guidance and Outlook: Not applicable. Form 13F filings are historical disclosures of holdings and do not contain forward-looking guidance or management commentary on business strategy.
Risks and Contingencies: The filing includes a standard disclaimer stating that the SEC has not reviewed the information for accuracy or completeness and that readers should not assume the information is accurate or complete.
Unusual Items: None identified in the provided text.
Investor Verification Checklist
- Verify the exact reporting period end date, as the text snippet does not explicitly confirm the date despite the metadata.
- Confirm the total value of the entire portfolio, as the provided text only lists two specific holdings.
- Check for any disclaimers regarding shared voting authority or derivative positions not fully detailed in this snippet.
- Review the full filing to determine if these holdings represent a significant portion of the manager's total assets under management.