---
schema_version: "secwatch.filing_event.v1"
accession: "0000776867-25-000008"
form_type: "8-K"
ticker: "WTM"
cik: "0000776867"
company_name: "WHITE MOUNTAINS INSURANCE GROUP LTD"
filed_at: "2025-06-06T23:59:59+00:00"
generated_at: "2026-05-19T19:09:57.320811+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "low"
source: SEC EDGAR
---

# White Mountains files investor presentation for annual meeting; no specifics in exhibit text

## Summary
- White Mountains held its Annual Investor Information Meeting on June 6, 2025.
- Exhibit 99.1 is titled '2025 Annual Investor Presentation'; full content not included in filing excerpt.
- No new financial data, guidance, or strategic updates are discernible from the provided text alone.
- Investors should consult the full presentation for any material disclosures.

## SEC filing metadata
- accession: 0000776867-25-000008
- form_type: 8-K
- ticker: WTM
- cik: 0000776867
- company_name: WHITE MOUNTAINS INSURANCE GROUP LTD
- filed_at: 2025-06-06T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: low
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/776867/000077686725000008/0000776867-25-000008-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/776867/000077686725000008/wtm-20250606.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000776867-25-000008
- JSON: https://secwatch.observer/filing/0000776867-25-000008.json
- Plain text: https://secwatch.observer/filing/0000776867-25-000008.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.