---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-041051"
form_type: "8-K"
ticker: "WTM"
cik: "0000776867"
company_name: "WHITE MOUNTAINS INSURANCE GROUP LTD"
filed_at: "2026-06-05T12:17:36+00:00"
generated_at: "2026-06-05T12:20:16.326260+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "low"
source: SEC EDGAR
---

# White Mountains holds annual investor meeting; no material financial details in 8-K filing

## Summary
- Filing reports use of investor presentation at June 5, 2026 Annual Investor Information Meeting.
- Exhibit 99.1 is the presentation; its content was not included in the public filing text.
- No specific financial data, guidance, or strategic changes are disclosed in this 8-K.

## SEC filing metadata
- accession: 0001628280-26-041051
- form_type: 8-K
- ticker: WTM
- cik: 0000776867
- company_name: WHITE MOUNTAINS INSURANCE GROUP LTD
- filed_at: 2026-06-05T12:17:36+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: low
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/776867/000162828026041051/0001628280-26-041051-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/776867/000162828026041051/wtm-20260605.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-041051
- JSON: https://secwatch.observer/filing/0001628280-26-041051.json
- Plain text: https://secwatch.observer/filing/0001628280-26-041051.txt

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