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White Mountains Insurance Group Ltd (WTM) KPIs and segments

WTMNYSEFire, Marine & Casualty InsuranceFiscal year ends December 31
Financials through Q3 FY2026, quarter ended Sep 30, 2026Last filing: 10-Q on Nov 5, 2026Score 15/3030% below fair value
$2254.95+8.43 (+0.38%)

Close on Nov 13, 2026Market cap $5.38BP/E 6.0Yield 0.04%

KPIs & segments

Operating metrics and segments that drive White Mountains Insurance's business

White Mountains Insurance's revenue by segment, product and region, plus the counts and sizes it tags in its 10-K and 10-Q filings (XBRL). Each figure links to the filing it came from. A fuller KPI sheet built from earnings releases and presentations is on the way. See the segment tables for a trailing-twelve-month view, or how companies compare on operating metrics.

The chart is empty. Tick the box next to any metric in the table below to plot it — tick several to compare them on one chart.

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Q2 2026
Q1 2026
Q4 2025
Q3 2025
Q2 2025
Q1 2025
Q4 2024
Q3 2024
Q2 2024
Q1 2024
Q4 2023
Q3 2023
P&C Insurance and Reinsurance (Ark/WM Outrigger)($M)
440376493590448413417633363337435513
Services, Industrial and Consumer (WTM Partners)($M)1
92.842.8
Product and service revenues($M)
92.842.8
Asset Management (Kudu)($M)1
68.96344.854.420.463.847.270.210.787.726.3
Product and service revenues($M)
00
Specialty Insurance Distribution (Distinguished)($M)1
57.440.343.414.30000
Product and service revenues($M)
0
HG Global($M)1
20.424.2
Product and service revenues($M)
00
Financial Guarantee (HG Global)($M)
17.229.324.232.1-54.815.77.9061.2-7.40
P&C Insurance Distribution (Bamboo)($M)1
0071.462.561.455.74231.10
Product and service revenues($M)
0
Asset Management (Kudu)($M)
68.96344.854.420.463.847.270.210.787.726.3
P&C Insurance Distribution (Bamboo)($M)
62.561.455.74231.1
Specialty Insurance Distribution (Distinguished)($M)
57.440.343.414.3
HG Global($M)
20.424.2
Services, Industrial and Consumer (WTM Partners)($M)
20.27.60
Asset Management (Kudu)($M)
5751.731.943.610.753.4-19.637.961.31.7074.916.3
HG Global($M)
10.416.7
Services, Industrial and Consumer (WTM Partners)($M)
4.100.90
P&C Insurance Distribution (Bamboo)($M)
2.701516.16.309.9015.56.400.90
Specialty Insurance Distribution (Distinguished)($M)
-10.5-17.6-13.8-2.70
P&C Insurance and Reinsurance (Ark/WM Outrigger)($M)
7,5707,2216,3546,7976,9066,3265,2995,5795,7045,1494,3794,414
Asset Management (Kudu)($M)
1,4971,4471,4021,2991,2311,2231,1081,0941,004953959836
Financial Guarantee (HG Global)($M)
1,2481,2371,2661,2451,2031,1791,2021,1801,1591,1721,083
HG Global($M)
1,2171,237
Specialty Insurance Distribution (Distinguished)($M)
7457017357140
P&C Insurance Distribution (Bamboo)($M)
6206155856005625280
Services, Industrial and Consumer (WTM Partners)($M)
435182
Earlier reporting (last reported 2026)1

103 metrics have no data in the last 12 quarters — .

Italic numbers are calculated by StockData from reported figures (hover for the formula). Numbers with a dotted underline are read from the text of earnings releases and presentations; hover to see the exact sentence. Tick a row to add it to the chart above (up to 8 lines).

Methodology and excluded metrics
  • Core rows come from the segment and revenue-disaggregation notes of 10-K and 10-Q filings (XBRL), linked to each filing. Fourth-quarter figures are the fiscal year less the first nine months (shown in italic).

Data updated 2026-08-06.

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