White Mountains Insurance Group

insurance company
Organization business Q7995089
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Financials

Self-reported XBRL data from 18 annual filings
Revenue
$3.73B
▲ 66.8% YoY FY2025
Net Income
$1.11B
▲ 380.2% YoY FY2025
Assets
$12.31B
▲ 24.0% YoY FY2025
EPS (diluted)
$430.14
▲ 379.1% YoY FY2025
$0.00$1.03B$2.05B$3.08B$4.11B FY2008: $2.95B · NI -$555.30M (-18.9% margin)FY2009: $3.44B · NI $470.00M (13.6% margin)FY2010: $2.33B · NI $86.50M (3.7% margin)FY2011: $2.17BFY2012: $2.44BFY2013: $1.36BFY2014: $1.41BFY2015: $440.00MFY2016: $157.70MFY2017: $373.80MFY2018: $369.10MFY2019: $893.40MFY2020: $895.60MFY2021: $614.40M · NI -$275.40M (-44.8% margin)FY2022: $1.16B · NI $792.80M (68.5% margin)FY2023: $2.17B · NI $509.20M (23.5% margin)FY2024: $2.24B · NI $230.40M (10.3% margin)FY2025: $3.73B · NI $1.11B (29.6% margin) '08'10'12'14'16'18'20'22'24'25
Revenue Net Income
Source: SEC EDGAR · latest 10-K filed 2025-12-31 · accession 0001628280-26-012603

White Mountains Insurance Group

Summary

White Mountains Insurance Group is a business[1]. It ranks in the top 4% of business entities by monthly Wikipedia readership (82 views/month).[2]

Key Facts

  • White Mountains Insurance Group is in the country of BM[3].
  • White Mountains Insurance Group's instance of is recorded as business[4].
  • White Mountains Insurance Group's instance of is recorded as public company[5].
  • White Mountains Insurance Group's stock exchange is recorded as New York Stock Exchange[6].
  • 1999-10-25 marks the founding of White Mountains Insurance Group[7].
  • White Mountains Insurance Group's official website is recorded as http://www.whitemountains.com/[8].
  • White Mountains Insurance Group's legal form is recorded as 7AS7[9].

Product Details

The following facts are restated verbatim from public-domain and CC0 open-data sources — every line is independently verifiable against the named source's catalog.

GLEIF Golden Copy — Level 1 entity data

  • Legal Entity Identifier (LEI): 549300N3FL068JERBG02[10]

  • Registered legal name: White Mountains Insurance Group, LTD.[11]

  • Legal jurisdiction: BM[12]

  • GLEIF entity category: GENERAL[13]

  • Legal form (ISO 20275 ELF): 7AS7[14]

  • Entity status: ACTIVE[15]

  • LEI registration status: ISSUED[16]

  • Entity created: 1999-10-25[17]

  • LEI first registered: 2016-05-14[18]

  • LEI last updated: 2025-07-23[19]

  • LEI next renewal: 2026-07-29[20]

  • Managing LOU: 5493001KJTIIGC8Y1R12[21]

  • Registration authority: RA000028[22]

  • Authority entity ID: 27225[23]

  • Conformity flag: CONFORMING[24]

Body

Founding

1999-10-25 marks the founding of White Mountains Insurance Group[7].

Ownership

White Mountains Insurance Group's stock exchange is recorded as New York Stock Exchange[6].

Why It Matters

White Mountains Insurance Group ranks in the top 4% of business entities by monthly Wikipedia readership (82 views/month).[2]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . Retrieved . wikidata.org.
  4. [6] . Polygon.io. Retrieved . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . Google Knowledge Graph. Retrieved . wikidata.org.
  7. [9] . wikidata.org.

Product details (FDA / USDA / NHTSA public-domain catalog data)

  1. [10] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  2. [11] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  3. [12] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  4. [13] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  5. [14] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  6. [15] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  7. [16] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  8. [17] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  9. [18] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  10. [19] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  11. [20] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  12. [21] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  13. [22] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  14. [23] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.
  15. [24] . Global Legal Entity Identifier Foundation (GLEIF). Retrieved . gleif.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). White Mountains Insurance Group. Retrieved May 5, 2026, from https://4ort.xyz/entity/white-mountains-insurance-group
MLA “White Mountains Insurance Group.” 4ort.xyz Knowledge Graph, 4ort.xyz, 5 May. 2026, https://4ort.xyz/entity/white-mountains-insurance-group.
BibTeX @misc{4ortxyz_white-mountains-insurance-group_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{White Mountains Insurance Group}}, year = {2026}, url = {https://4ort.xyz/entity/white-mountains-insurance-group}, note = {Accessed: 2026-05-05}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): White Mountains Insurance Group — https://4ort.xyz/entity/white-mountains-insurance-group (retrieved 2026-05-05)

Canonical URL: https://4ort.xyz/entity/white-mountains-insurance-group · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 7w ago · KaleemBot bot · 2026-05-20 view diff on Wikidata ↗
    Stock exchange
    Crunchbase organization id white-mountains-insurance-group
    Wikirate company id 2262977
    Stock exchange New York Stock Exchange
    + 12 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update-languages-and-other-short:0||ur */"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.