White Mountains Insurance Group WTM Specialty — 2

Other product segments

Similar metrics at other companies

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

-$20M-8.7%

ACGLSpecialty — Liabilities for losses and loss adjustment expenses, net of reinsurance

366,900,000,000%+92,000,000,000pp

RDNSpecialty Insurance — Liability For Unpaid Claims And Claims Adjustment Expense Period Increase Decrease

$88M—

ORISpecialty Insurance — Claims and claim adjustment expenses attributable to insured events of prior years

$610.9M+19.6%

RDNSpecialty Insurance — Premiums Written Net

$148.48M—

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

856,400,000,000%+686,800,000,000pp

Questions, answered.

What is White Mountains Insurance Group's specialty — 2?

White Mountains Insurance Group (WTM) reported specialty — 2 of 26.8% in Q4 2025.

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

White Mountains Insurance Group's specialty — 2 decreased by 13.0% year-over-year, from 30.8% to 26.8%.

What does specialty — 2 mean?

Represents the net impact of prior year reserve development for the specialty insurance segment. This metric reflects the adjustment in estimated liabilities for claims incurred in previous reporting periods, indicating the accuracy of initial underwriting and reserving assumptions.