White Mountains Insurance Group WTM Marine & Energy — Prior Year

Other product segments

Similar metrics at other companies

MKLMarine and energy — Incurred losses and loss adjustment expenses, prior accident years

-$42.6M-191%

MKLMarine and energy — Earned premiums

$213.35M+4.7%

HIGMarine — Prior accident year development [1]

$4M—

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

-$4.5M0.0%

HIGMarine — Unpaid losses and loss adjustment expenses

$598M+1.9%

SEBMarine — Income Loss From Equity Method Investments

$1M0.0%

Questions, answered.

What is White Mountains Insurance Group's marine & energy — prior year?

White Mountains Insurance Group (WTM) reported marine & energy — prior year of $1.18M in Q4 2025.

What does marine & energy — prior year mean?

This metric represents the prior year development of loss and loss adjustment expense reserves for the Marine and Energy insurance segment. It reflects the change in estimated liabilities for claims occurring in previous periods, serving as a key indicator of reserve adequacy and underwriting accuracy.