---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-035349"
form_type: "8-K"
ticker: "WTM"
cik: "0000776867"
company_name: "WHITE MOUNTAINS INSURANCE GROUP LTD"
filed_at: "2026-05-15T13:02:53+00:00"
generated_at: "2026-05-15T13:05:50.252442+00:00"
event_type: "debt"
sentiment: "positive"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# White Mountains' HG Global unit issues $200M 7.39% senior notes due 2036

## Summary
- Net proceeds will repay $150M existing term loan (9.93% floating), pay fees, and fund a dividend to White Mountains.
- New notes bear fixed 7.39% interest, mature May 14, 2036, secured by collateral.
- Debt refinancing reduces interest cost; fixed rate provides predictable expense.
- Transaction closed May 14, 2026; notes placed privately with institutional purchasers.

## SEC filing metadata
- accession: 0001628280-26-035349
- form_type: 8-K
- ticker: WTM
- cik: 0000776867
- company_name: WHITE MOUNTAINS INSURANCE GROUP LTD
- filed_at: 2026-05-15T13:02:53+00:00
- event_type: debt
- sentiment: positive
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 1.01, 2.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/776867/000162828026035349/0001628280-26-035349-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/776867/000162828026035349/wtm-20260514.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-035349
- JSON: https://secwatch.observer/filing/0001628280-26-035349.json
- Plain text: https://secwatch.observer/filing/0001628280-26-035349.txt

## Key facts
- Debt Financings
  WHITE MOUNTAINS INSURANCE GROUP LTD incurred senior notes of $200,000,000 aggregate principal amount with the purchasers party thereto at fixed rate of 7.39% per annum maturing May 14, 2036.
  - Instrument: senior notes
  - Principal: $200,000,000 aggregate principal amount
  - Counterparty: the purchasers party thereto
  - Rate: fixed rate of 7.39% per annum
  - Maturity: May 14, 2036
  - Event: incurrence
  source text: On May 15, 2026, White Mountains Insurance Group, Ltd. (NYSE: WTM) (“White Mountains”) announced that HG Global Ltd. (“HGG”), a direct subsidiary of White Mountains, completed a private placement of $200,000,000 aggregate principal amount of fixed rate senior secured notes (the “New Notes”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/776867/000162828026035349/0001628280-26-035349-index.htm

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