secwatch.observer — SEC 8-K summary
======================================

Issuer:     WHITE MOUNTAINS INSURANCE GROUP LTD (WTM)
CIK:        0000776867
Form:       8-K
Filed at:   2025-01-08T23:59:59+00:00
Accession:  0000776867-25-000001
Event type: other_material
Sentiment:  neutral
Materiality: 0.50
Item codes: 8.01
LLM model:  deepseek-v4-flash:cloud@v2

White Mountains renews Outrigger Re sidecar with $230M total capital for 2025
-----------------------------------------------------------------------------

- Outrigger Re renewed on similar terms as 2024; quota share with Ark on global property catastrophe portfolio starting Jan 1, 2025.
- Total investor capital of $230M for Jan 1, 2025 renewals; White Mountains contributed $150M.
- Remaining $80M from continuing third-party investors; sidecar provides collateralized reinsurance protection.
- White Mountains is parent of Ark Insurance Holdings, the specialty P&C reinsurance subsidiary.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/776867/000077686725000001/0000776867-25-000001-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/776867/000077686725000001/wtm-20250108.htm
  HTML page:      https://secwatch.observer/filing/0000776867-25-000001

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer