v3.26.1
Statements of Net Assets Available for Benefits - EBP WRPSP - USD ($)
Dec. 31, 2025
Dec. 31, 2024
Assets:    
Cash $ 3,291,585 $ 3,231,317
Investments, at fair value (note 6):    
Total Investments, at fair value 2,536,543,238 2,197,627,805
Participant loans receivable 19,471,900 18,209,749
Contributions receivable employer 78,642,515 74,314,416
Total Assets 2,637,949,238 2,293,383,287
EBP, Liability [Abstract]    
Payable for securities purchased 71,181 93,133
Payable for trustee, administrative fees and other 37 1,282
Total Liabilities 71,218 94,415
Net assets available for plan benefits 2,637,878,020 2,293,288,872
W. R. Berkley Corporation Common Stock Fund    
Investments, at fair value (note 6):    
Total Investments, at fair value 298,705,590 254,610,103
Mutual Funds    
Investments, at fair value (note 6):    
Total Investments, at fair value 390,070,293 365,920,928
Common Collective Trusts    
Investments, at fair value (note 6):    
Total Investments, at fair value 1,744,402,311 1,478,011,673
Fixed Income Investments    
Investments, at fair value (note 6):    
Total Investments, at fair value 61,148,236 69,506,345
Money Market Fund    
Investments, at fair value (note 6):    
Total Investments, at fair value 42,062,308 29,422,425
Other Investments    
Investments, at fair value (note 6):    
Total Investments, at fair value $ 154,500 $ 156,331