White Mountains Insurance Group WTM Casualty-Runoff — 2

Other product segments

Similar metrics at other companies

WRBCasualty — Reserves for loss and loss adjustment expenses before 2016, net of reinsurance

$331.38M-7.4%

ACGLCasualty — Prior years

$20M+150%

ALLRun-off Property-Liability — Prior years

$0-100%

ALLRun-off Property-Liability — Reserve for property and casualty insurance claims and claims expense

$761M+5.3%

ALLRun-off Property-Liability — Losses from catastrophes, net of recoveries

$30.75M+108%

SIGICasualty lines — Incurred loss and loss expense for claims occurring in the prior year

$0+100%

Questions, answered.

What is White Mountains Insurance Group's casualty-runoff — 2?

White Mountains Insurance Group (WTM) reported casualty-runoff — 2 of 13.9% in Q4 2025.

How has White Mountains Insurance Group's casualty-runoff — 2 changed year-over-year?

White Mountains Insurance Group's casualty-runoff — 2 decreased by 1.4% year-over-year, from 14.1% to 13.9%.

What does casualty-runoff — 2 mean?

This metric represents the net favorable or unfavorable development of prior period loss reserves within the casualty runoff segment. It reflects the accuracy of initial actuarial estimates for claims incurred in previous years as they are settled or re-evaluated. Changes in this figure indicate the adequacy of historical reserving practices.