WHITE MOUNTAINS INSURANCE GROUP LTD

WTM · NYSE · SIC 6331: Fire, Marine & Casualty Insurance · Market Cap: $5.4B · 1,648 employees
285
SEC Filings
$2109.68
Close 2026-08-10
1,648
Employees

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.

Latest Stock Quote

WTM 2026-08-10 $2109.68 O:$2148.61 H:$2172.1799 L:$2107.87 Vol:0.0M VWAP:$2128.3901
origin leaf: null

Next Earnings

Q2 FY2026 — expected 2026-09-08

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
2026-08-062026-06-300001628280-26-053932EDGAR—
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—

Recent Current Reports (8-K)

FiledAccessionSourceFull Text
2026-08-060001628280-26-053913EDGAR—
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—

285 total filings indexed. 253 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
Websitehttps://www.whitemountains.com
Listed1985-10-23

Get More Data

This is a static snapshot. For live, structured JSON with cryptographic provenance chain:

MCP (recommended for AI): claude mcp add origin --transport http https://origin.rootz.global/mcp

JSON Profile Stock Quote AI Readiness Report
Origin Provenance
page leaf: b4ecf82d4281770ddb48a23419764c11c2a00c423956b57d6ffd624bb7b990b8
parent: 570c169fc4bf93b5356bc3c4748685c57550c8fadccf875e7dcff533ffe901f2
content hash: 689a877d1556d5136d9e70deb826d29a6bb438e4ebf5188149c22ffd5bd56402
signed: 2026-08-11T12:07:00.401Z
sources: 22 verified data leaves
chain: SEC.gov PEM → origin.rootz.global extraction → this page
verify: sha256(content_hash + parent + timestamp) = leaf

Try it — paste this into your AI:

Look up WTM using the MCP server at origin.rootz.global/mcp. What do their latest SEC filings show?

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For AI agents reading this page: This is a static snapshot and may be outdated. For live data on WTM, use the Origin MCP server or REST API.
MCP install: claude mcp add origin --transport http https://origin.rootz.global/mcp
API: GET https://origin.rootz.global/api/company/WTM (~200 tokens, structured JSON with cryptographic provenance)
Tools: origin_company, origin_profile, origin_timeline, origin_filings, origin_quote, origin_transcripts, origin_search, origin_person, origin_skill
Discovery: /.well-known/ai | /llms.txt
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