WHITE MOUNTAINS INSURANCE GROUP LTD

WTM · NYSE · SIC 6331: Fire, Marine & Casualty Insurance
283
SEC Filings

Business Summary

White Mountains Insurance Group, Ltd. is a Bermuda-based holding company engaged in opportunistic acquisitions in insurance, financial services, and related sectors. It operates through five segments: Ark/WM Outrigger (specialty property and casualty insurance and reinsurance), HG Global (municipal bond guarantee reinsurance), Kudu (capital solutions for asset and wealth management firms), Distinguished (specialty insurance distribution), and Other Operations including interests in Bamboo, MediaAlpha, PassportCard/DavidShield, BroadStreet, and Elementum.

Next Earnings

Q2 FY2026 — expected 2026-09-08

Key Facts from Earnings Calls

TypeSubjectDetailQuarter
topic_mentionWTMdiscussed_in_filing Enterprise
topic_mentionWTMdiscussed_in_filing Healthcare & Bio
topic_mentionWTMdiscussed_in_filing Sovereign & Government
topic_mentionWTMdiscussed_in_filing Enterprise
topic_mentionWTMdiscussed_in_filing Healthcare & Bio
topic_mentionWTMdiscussed_in_filing Sovereign & Government
topic_mentionWTMdiscussed_in_filing Enterprise
topic_mentionWTMdiscussed_in_filing Healthcare & Bio
topic_mentionWTMdiscussed_in_filing Sovereign & Government
topic_mentionWTMdiscussed_in_filing Enterprise
topic_mentionWTMdiscussed_in_filing Healthcare & Bio
topic_mentionWTMdiscussed_in_filing Sovereign & Government

Annual Reports (10-K)

FiledPeriodAccessionSourceFull Text
2026-02-272025-12-310001628280-26-012603EDGAR126K words
2025-02-282024-12-310000776867-25-000003EDGAR—
2024-02-262023-12-310000776867-24-000005EDGAR—
2023-02-272022-12-310000776867-23-000004EDGAR—
2022-02-282021-12-310000776867-22-000002EDGAR—
2021-02-262020-12-310000776867-21-000004EDGAR—
2020-03-022019-12-310000776867-20-000009EDGAR—
2019-02-272018-12-310000776867-19-000008EDGAR—
2018-02-282017-12-310000776867-18-000002EDGAR—
2017-02-272016-12-310000776867-17-000005EDGAR—

Quarterly Reports (10-Q)

FiledPeriodAccessionSourceFull Text
2025-11-062025-09-300001628280-25-049910EDGAR61K words
2025-08-072025-06-300000776867-25-000014EDGAR—
2025-05-072025-03-310000776867-25-000006EDGAR—
2024-11-062024-09-300000776867-24-000019EDGAR—
2024-08-072024-06-300000776867-24-000015EDGAR—
2024-05-092024-03-310000776867-24-000010EDGAR—
2023-11-062023-09-300000776867-23-000017EDGAR—
2023-08-072023-06-300000776867-23-000013EDGAR—
2023-05-092023-03-310000776867-23-000006EDGAR—
2022-11-072022-09-300000776867-22-000016EDGAR—
2022-08-082022-06-300000776867-22-000013EDGAR—
2022-05-062022-03-310000776867-22-000005EDGAR—

Recent Current Reports (8-K)

FiledAccessionSourceFull Text
2026-04-010001628280-26-022818EDGAR0K words
2026-02-260001628280-26-012417EDGAR—
2026-02-060001628280-26-005947EDGAR—
2026-01-070001628280-26-001102EDGAR—
2025-12-080001628280-25-055702EDGAR—
2025-11-060001628280-25-049888EDGAR—
2025-10-030001628280-25-044062EDGAR—
2025-09-030000776867-25-000016EDGAR—
2025-09-020000776867-25-000015EDGAR—
2025-08-070000776867-25-000013EDGAR—

283 total filings indexed. 251 additional filings (S-1, DEF 14A, etc.) View all (JSON) · SEC EDGAR

Sector Peers

ALL — ALLSTATE CORP ACIC — AMERICAN COASTAL INSURANCE Corp AFG — AMERICAN FINANCIAL GROUP INC AIG — AMERICAN INTERNATIONAL GROUP, INC. AMSF — AMERISAFE INC ACGL — ARCH CAPITAL GROUP LTD. AHL-PE — ASPEN INSURANCE HOLDINGS LTD AXS — AXIS CAPITAL HOLDINGS LTD

Tags

property-and-casualty-insurance-and-reinsurance municipal-bond-guarantee-reinsurance asset-and-wealth-management-capital-solutions specialty-insurance-distribution financial-services-and-insurance-holding

Company Identity

CIK0000776867
TickerWTM
ExchangeNYSE
SIC6331: Fire, Marine & Casualty Insurance
IncorporatedD0
HeadquartersHamilton, Bermuda

Get More Data

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JSON Profile Stock Quote AI Readiness Report
Origin Provenance
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signed: 2026-04-13T04:48:16.437Z
sources: 22 verified data leaves
chain: SEC.gov PEM → origin.rootz.global extraction → this page
verify: sha256(content_hash + parent + timestamp) = leaf