Total of IBNR liabilities plus expected development on reported claims

Arch Capital Group·Products & Services·9 segments·Rolls up to Incurred but not reported (IBNR) claims liability, net

Breakdown

Segment	Q4 '21	Q4 '22	Q4 '23	Q4 '24	Q4 '25
Specialty	30,066,700,000%	60,133,400,000%	81,700,000,000%	107,000,000,000%	127,500,000,000%
Casualty	39,288,500,000%	48,255,200,000%	56,800,000,000%	68,000,000,000%	92,800,000,000%
Property excluding property catastrophe	25,534,300,000%	36,052,800,000%	41,400,000,000%	68,700,000,000%	64,800,000,000%
Marine and aviation	8,945,900,000%	9,991,700,000%	12,700,000,000%	15,700,000,000%	17,200,000,000%
Property catastrophe	6,182,100,000%	7,347,400,000%	7,600,000,000%	10,000,000,000%	8,400,000,000%
Total	—	—	—	—	—

Property, energy, marine and aviationView metric

Third party occurrence businessView metric

Third party claims-made businessView metric

Multi-line and other specialtyView metric

Property catastropheView metric

Property excluding property catastropheView metric

Marine and aviationView metric