---
schema_version: "secwatch.filing_event.v1"
accession: "0000776867-24-000004"
form_type: "8-K"
ticker: "WTM"
cik: "0000776867"
company_name: "WHITE MOUNTAINS INSURANCE GROUP LTD"
filed_at: "2024-02-23T23:59:59+00:00"
generated_at: "2026-06-05T17:48:11.165836+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Reid T. Campbell elected to White Mountains board after retiring as President

## Summary
- Board size increased from 9 to 10 with election of Reid T. Campbell as director on Feb 22, 2024.
- Campbell retired as President after 30 years; retirement previously disclosed, not due to disagreement.
- He will receive standard non-employee director compensation including pro-rated retainer and grant for 2024.
- Campbell had served as CFO and most recently President over his 30-year career at the company.

## SEC filing metadata
- accession: 0000776867-24-000004
- form_type: 8-K
- ticker: WTM
- cik: 0000776867
- company_name: WHITE MOUNTAINS INSURANCE GROUP LTD
- filed_at: 2024-02-23T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/776867/000077686724000004/0000776867-24-000004-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/776867/000077686724000004/wtm-20240222.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000776867-24-000004
- JSON: https://secwatch.observer/filing/0000776867-24-000004.json
- Plain text: https://secwatch.observer/filing/0000776867-24-000004.txt

## Key facts
- Executive change
  Reid T. Campbell was elected as Director at WHITE MOUNTAINS INSURANCE GROUP LTD.
  - Action: elected
  - Role: Director
  source text: On February 22, 2024, the Board of Directors (the “Board”) of White Mountains Insurance Group, Ltd. (the “Company”) elected Reid T. Campbell as a director of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/776867/000077686724000004/0000776867-24-000004-index.htm
- Executive change
  Reid T. Campbell retired as President at WHITE MOUNTAINS INSURANCE GROUP LTD.
  - Action: retired
  - Role: President
  source text: On February 22, 2024, Mr. Campbell retired from employment with the Company after thirty years of service in various roles, including the roles of Chief Financial Officer and, most recently, President.
  evidence_url: https://www.sec.gov/Archives/edgar/data/776867/000077686724000004/0000776867-24-000004-index.htm

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