Schedule IV - Reinsurance

12 Months Ended

Dec. 31, 2025

SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]

SCHEDULE IV

ARCH CAPITAL GROUP LTD. AND SUBSIDIARIES

REINSURANCE

(U.S. dollars in millions)


	Gross Amount		Ceded to Other Companies (1)		Assumed From Other Companies (1)		Net Amount		Percentage of Amount Assumed to Net
Year Ended December 31, 2025
Premiums Written:
Insurance	$	8,268	$	(2,637)	$	2,167	$	7,798	27.8	%
Reinsurance	895		(3,531)		10,254		7,618		134.6	%
Mortgage	1,087		(245)		218		1,060		20.6	%

Total	$	10,250	$	(6,402)	$	12,628	$	16,476	76.6	%
Year Ended December 31, 2024
Premiums Written:
Insurance	$	7,970	$	(2,179)	$	1,083	$	6,874	15.8	%
Reinsurance	956		(3,366)		10,156		7,746		131.1	%
Mortgage	1,130		(239)		221		1,112		19.9	%

Total	$	10,056	$	(5,779)	$	11,455	$	15,732	72.8	%
Year Ended December 31, 2023
Premiums Written:
Insurance	$	7,865	$	(2,049)	$	46	$	5,862	0.8	%
Reinsurance	626		(2,559)		8,487		6,554		129.5	%
Mortgage	1,161		(335)		226		1,052		21.5	%

Total	$	9,652	$	(4,935)	$	8,751	$	13,468	65.0	%

(1) Certain amounts included in the gross premiums written of each segment are related to intersegment transactions and are included in the gross premiums written of each segment. Accordingly, the sum of gross premiums written for each segment does not agree to the total gross premiums written as shown in the table above due to the elimination of intersegment transactions in the total.