White Mountains Insurance Group WTM Casualty-Active — 6

Other product segments

Similar metrics at other companies

RLICasualty — Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

$156.99M+8.8%

SIGICasualty lines — Current year

$562.1M+8.2%

KNSLCasualty - occurrence — Cumulative paid claims and allocated claim adjustment expense, net

$686.48M+712%

RLICasualty — Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

-$8.25M+37.7%

EGCasualty Insurance — Year six

22.7%—

ACGLCasualty — Incurred losses and allocated loss adjustment expenses, net of reinsurance

521,000,000,000%+447,600,000,000pp

Questions, answered.

What is White Mountains Insurance Group's casualty-active — 6?

White Mountains Insurance Group (WTM) reported casualty-active — 6 of 11.2% in Q4 2025.

How has White Mountains Insurance Group's casualty-active — 6 changed year-over-year?

White Mountains Insurance Group's casualty-active — 6 decreased by 4.3% year-over-year, from 11.7% to 11.2%.

What does casualty-active — 6 mean?

Quantifies the adjustment to prior year loss and loss adjustment expense reserves within the Casualty-Active segment. It provides transparency into how historical underwriting assumptions align with actual claims settlement patterns.