ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Burglary & Theft

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total -0.02% $-500.00 $-320.00 $0.00 $-113.00 35.31%
Missouri Total 100.00% $3,075,875 $3,041,453 $1,243,717 $856,560 28.16%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Commercial Auto Collision

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 1.35% $1,390,002.00 $1,287,075.00 $668,501.00 $640,340.00 49.75%
Missouri Total 100.00% $102,908,301 $100,472,114 $46,435,406 $45,818,749 45.60%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Commercial Auto Comprehensive

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.34% $207,701.00 $192,322.00 $42,670.00 $40,873.00 21.25%
Missouri Total 100.00% $61,203,306 $60,296,445 $32,970,544 $31,213,703 51.77%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Commercial Auto Liability Bodily Injury

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.09% $239,450.00 $165,384.00 $60,823.00 $130,141.00 78.69%
Missouri Total 100.00% $266,104,571 $257,394,838 $167,500,159 $156,039,811 60.62%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Commercial Fire & Allied Lines

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.51% $690,788.00 $409,431.00 $26,664.00 $66,622.00 16.27%
Missouri Total 100.00% $135,095,191 $140,253,823 $59,288,986 $58,928,282 42.02%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Commercial Multi-Peril

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.02% $107,008.00 $118,748.00 $57,119.00 $88,414.00 74.46%
Missouri Total 100.00% $604,339,988 $594,249,075 $246,348,996 $288,959,671 48.63%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Direct Workers Compensation

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.43% $4,178,821.00 $3,371,799.00 $77,484.00 $1,688,963.00 50.09%
Missouri Total 100.00% $963,548,981 $951,290,491 $478,733,108 $593,495,368 62.39%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Earthquake

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.01% $5,500.00 $1,386.00 $0.00 $370.00 26.70%
Missouri Total 100.00% $71,142,042 $68,942,586 $2,034 $663,937 0.96%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Fidelity

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.00% $-149.00 $-107.00 $0.00 $-37.00 34.58%
Missouri Total 100.00% $22,168,831 $22,600,150 $8,928,202 $9,230,395 40.84%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Accident & Health

Group Stop Loss

Market_Share Number of Insureds Direct Premium Written Direct Premium Earned Dividends Paid Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.03% 265 $68,760.00 $68,760.00 $0.00 $0.00 $0.00 0.00%
Missouri Total 100.00% 827,624 $232,404,579 $232,951,401 $0 $86,691,187 $189,878,256 81.51%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Accident & Health

Individual Limited Benefit

Market_Share Number of Insureds Direct Premium Written Direct Premium Earned Dividends Paid Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.75% 1 $210,338.00 $175,005.00 $0.00 $18,879.00 $106,068.00 60.61%
Missouri Total 100.00% 150,444 $28,173,993 $27,922,148 $7,077 $13,925,642 $14,162,998 50.72%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Inland Marine (Incl Auto Cargo)

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.19% $360,775.00 $354,101.00 $106,240.00 $122,339.00 34.55%
Missouri Total 100.00% $187,073,322 $187,813,880 $81,270,526 $85,100,266 45.31%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Other Liability - Bodily Injury & Property Damage

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 1.24% $5,088,252.00 $4,465,119.00 $27,702.00 $2,139,545.00 47.92%
Missouri Total 100.00% $409,263,293 $444,911,829 $227,717,624 $368,806,231 82.89%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Products Liability

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.01% $3,971.00 $211.00 $0.00 $2,074.00 982.94%
Missouri Total 100.00% $48,418,835 $47,202,540 $38,723,657 $43,669,821 92.52%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Surety

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.50% $287,958.00 $224,709.00 $0.00 $29,615.00 13.18%
Missouri Total 100.00% $57,700,529 $58,025,787 $4,164,385 $8,226,200 14.18%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Accident & Health

Total Accident & Health

Market_Share Number of Insureds Direct Premium Written Direct Premium Earned Dividends Paid Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.01% 266 $279,098.00 $243,765.00 $0.00 $18,879.00 $106,068.00 43.51%
Missouri Total 100.00% 15,325,488 $4,295,618,608 $4,290,144,267 $1,485,559 $3,002,308,121 $3,208,218,965 74.78%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Total Commercial Automobile

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.34% $1,837,153.00 $1,644,781.00 $771,994.00 $811,354.00 49.33%
Missouri Total 100.00% $545,427,936 $534,465,268 $301,346,726 $287,210,034 53.74%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Total Fire & Allied Lines

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.30% $690,788.00 $409,431.00 $26,664.00 $66,622.00 16.27%
Missouri Total 100.00% $228,110,674 $229,282,107 $100,938,474 $99,328,482 43.32%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Accident & Health

Total Group Accident & Health

Market_Share Number of Insureds Direct Premium Written Direct Premium Earned Dividends Paid Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.00% 265 $68,760.00 $68,760.00 $0.00 $0.00 $0.00 0.00%
Missouri Total 100.00% 13,467,585 $3,292,621,915 $3,288,067,459 $208,057 $2,379,030,650 $2,553,729,227 77.67%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Accident & Health

Total Individual Accident & Health

Market_Share Number of Insureds Direct Premium Written Direct Premium Earned Dividends Paid Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.02% 1 $210,338.00 $175,005.00 $0.00 $18,879.00 $106,068.00 60.61%
Missouri Total 100.00% 1,857,903 $1,002,996,693 $1,002,076,808 $1,277,502 $623,277,471 $654,489,738 65.31%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

Total Property & Casualty

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.17% $13,489,004.00 $11,377,909.00 $1,526,095.00 $5,371,926.00 47.21%
Missouri Total 100.00% $7,912,453,158 $7,829,991,916 $4,189,177,430 $4,504,110,599 57.52%



ARCH INSURANCE COMPANY

2004 Supplemental Data for

Property & Casualty

VSI/Collateral Protection

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 15.71% $929,427.00 $788,051.00 $458,892.00 $422,780.00 53.65%
Missouri Total 100.00% $5,916,230 $4,571,439 $3,972,563 $3,845,612 84.12%



Additional data is available for this company for the following year(s):