secwatch.observer — SEC 8-K summary
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Issuer:     WHITE MOUNTAINS INSURANCE GROUP LTD (WTM)
CIK:        0000776867
Form:       8-K
Filed at:   2026-01-07T23:59:59+00:00
Accession:  0001628280-26-001102
Event type: other_material
Sentiment:  neutral
Materiality: 0.35
Item codes: 8.01
LLM model:  deepseek-v4-flash:cloud@v2

Ark Insurance renews Outrigger sidecar with $70M third-party capital for 2026
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- Outrigger Re Ltd. renewed for 2026 on similar terms as 2025; deployed $70M total investor capital from third-party investors.
- Capital reduction driven by Ark's increased use of traditional quota share reinsurance for 2026.
- The sidecar provides collateralized reinsurance on a portion of Ark Bermuda's global property catastrophe portfolio.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/776867/000162828026001102/0001628280-26-001102-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/776867/000162828026001102/wtm-20260107.htm
  HTML page:      https://secwatch.observer/filing/0001628280-26-001102

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