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Schedule III - Supplementary Insurance Information
 12 Months Ended
Dec. 31, 2024
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]  
Schedule III - Supplementary Insurance Information
Schedule III

W. R. Berkley Corporation and Subsidiaries
Supplementary Insurance Information
December 31, 2024, 2023 and 2022
(In thousands)Deferred
Policy
Acquisition
Cost		Reserve for
Losses and
Loss Expenses		Unearned
Premiums		Net Premiums
Earned		Net
Investment
Income		Loss and Loss
Expenses		Amortization of
Deferred Policy
Acquisition
Cost		Other
Operating Costs
and Expenses		Net
Premiums
Written
December 31, 2024         
Insurance$840,917 $16,887,821 $5,836,435 $10,086,308 $1,057,738 $6,332,490 $1,081,170 $1,825,758 $10,549,550 
Reinsurance & Monoline Excess110,811 3,480,209 538,677 1,462,177 234,728 799,105 138,679 292,526 1,422,546 
Corporate, other and eliminations — — — — 40,695 — — 264,173 — 
Total$951,728 $20,368,030 $6,375,112 $11,548,485 $1,333,161 $7,131,595 $1,219,849 $2,382,457 $11,972,096 
December 31, 2023         
Insurance$736,348 $15,298,372 $5,322,869 $9,007,376 $783,660 $5,615,526 $897,908 $1,684,514 $9,560,533 
Reinsurance & Monoline Excess125,261 3,441,280 599,457 1,393,311 221,966 756,616 141,067 268,309 1,393,934 
Corporate, other and eliminations — — — — 47,209 — — 372,138 — 
Total$861,609 $18,739,652 $5,922,326 $10,400,687 $1,052,835 $6,372,142 $1,038,975 $2,324,961 $10,954,467 
December 31, 2022         
Insurance$633,493 $13,655,613 $4,708,586 $8,171,828 $543,844 $5,013,614 $881,567 $1,418,374 $8,609,028 
Reinsurance & Monoline Excess129,993 3,355,610 589,068 1,389,601 200,512 848,136 157,336 247,918 1,395,042 
Corporate, other and eliminations — — — — 34,829 — — 256,310 — 
Total$763,486 $17,011,223 $5,297,654 $9,561,429 $779,185 $5,861,750 $1,038,903 $1,922,602 $10,004,070 
__________________________
See Report of Independent Registered Public Accounting Firm.