White Mountains Insurance Group WTM Specialty — 5

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

ACGLSpecialty lines — Prior years

-$63M-80.0%

CNASpecialty — Catastrophe losses

$0—

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

$13M—

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 — 5?

White Mountains Insurance Group (WTM) reported specialty — 5 of 6.3% in Q4 2025.

How has White Mountains Insurance Group's specialty — 5 changed year-over-year?

White Mountains Insurance Group's specialty — 5 decreased by 13.7% year-over-year, from 7.3% to 6.3%.

What does specialty — 5 mean?

Reflects the financial impact of changes in loss reserve estimates for specialty insurance products related to prior underwriting years. This metric is essential for evaluating the historical accuracy of the company's actuarial modeling and reserve setting processes.