ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Aircraft

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 1.10% $281,817.00 $353,987.00 $151,794.00 $281,982.00 79.66%
Missouri Total 100.00% $25,567,606 $25,386,925 $13,582,597 $12,020,384 47.35%



ARCH INSURANCE COMPANY

2010 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 0.26% $172,134.00 $269,361.00 $129,214.00 $135,233.00 50.21%
Missouri Total 100.00% $66,932,024 $68,113,590 $40,992,950 $41,381,049 60.75%



ARCH INSURANCE COMPANY

2010 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 0.11% $51,180.00 $80,458.00 $38,419.00 $40,208.00 49.97%
Missouri Total 100.00% $46,363,065 $46,936,009 $27,901,887 $26,760,293 57.01%



ARCH INSURANCE COMPANY

2010 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 0.58% $1,421,784.00 $1,480,558.00 $209,739.00 $545,142.00 36.82%
Missouri Total 100.00% $243,296,034 $246,226,707 $133,490,194 $118,854,870 48.27%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Commercial Auto Medical Payments

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.36% $28,556.00 $29,452.00 $801.00 $0.00 0.00%
Missouri Total 100.00% $7,953,305 $8,059,404 $9,271,720 $9,846,957 122.18%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Commercial Auto Uninsured Motorists

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.22% $36,580.00 $37,728.00 $0.00 $0.00 0.00%
Missouri Total 100.00% $16,956,695 $17,022,030 $8,827,137 $10,146,718 59.61%



ARCH INSURANCE COMPANY

2010 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 0.12% $156,286.00 $164,691.00 $0.00 $82,528.00 50.11%
Missouri Total 100.00% $131,914,727 $134,145,060 $55,201,863 $46,760,577 34.86%



ARCH INSURANCE COMPANY

2010 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 0.12% $752,454.00 $703,970.00 $93,481.00 $18,553.00 2.64%
Missouri Total 100.00% $607,509,479 $606,804,684 $310,259,666 $298,468,703 49.19%



ARCH INSURANCE COMPANY

2010 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 0.61% $4,141,102.00 $4,213,058.00 $873,771.00 $1,886,187.00 44.77%
Missouri Total 100.00% $679,862,271 $690,205,385 $452,712,053 $461,544,429 66.87%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Earthquake

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.15% $128,644.00 $115,650.00 $0.00 $0.00 0.00%
Missouri Total 100.00% $87,756,586 $87,451,308 $336,994 $255,691 0.29%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Excess Workers Compensation

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.77% $186,439.00 $197,214.00 $0.00 $142,881.00 72.45%
Missouri Total 100.00% $24,229,644 $24,194,625 $9,181,976 $30,115,866 124.47%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Fidelity

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.17% $35,812.00 $30,718.00 $0.00 $8,800.00 28.65%
Missouri Total 100.00% $20,805,445 $20,566,492 $13,613,445 $14,143,100 68.77%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Accident & Health

Individual Accident Only

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% 0 $0.00 $0.00 $0.00 $0.00 $-4,865.00 0.00%
Missouri Total 100.00% 697,874 $57,040,268 $57,342,016 $8 $25,743,539 $26,501,210 46.22%



ARCH INSURANCE COMPANY

2010 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 0.26% $546,731.00 $456,740.00 $539,956.00 $572,482.00 125.34%
Missouri Total 100.00% $213,958,608 $212,889,339 $109,685,143 $103,375,666 48.56%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Ocean Marine

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.00% $0.00 $0.00 $0.00 $-1.00 0.00%
Missouri Total 100.00% $26,943,829 $29,716,141 $15,906,755 $19,834,580 66.75%



ARCH INSURANCE COMPANY

2010 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 0.22% $1,286,678.00 $1,447,939.00 $-156,257.00 $168,117.00 11.61%
Missouri Total 100.00% $585,627,179 $576,485,720 $284,022,044 $264,509,677 45.88%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Other Specific

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.00% $0.00 $0.00 $0.00 $-9,542.00 0.00%
Missouri Total 100.00% $4,531,469 $4,941,892 $776,550 $781,081 15.81%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Private Passenger Auto Liability Bodily Injury

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.00% $0.00 $0.00 $-350.00 $-350.00 0.00%
Missouri Total 100.00% $772,271,799 $761,347,849 $456,137,054 $436,190,500 57.29%



ARCH INSURANCE COMPANY

2010 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 0.50% $124,216.00 $176,047.00 $424,305.00 $433,792.00 246.41%
Missouri Total 100.00% $24,912,194 $24,812,727 $27,885,813 $29,809,529 120.14%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Professional Liability (Excl Medical Malpractice)

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 2.85% $2,524,732.00 $2,455,898.00 $667,839.00 $-227,116.00 -9.25%
Missouri Total 100.00% $88,630,769 $88,874,924 $36,738,259 $41,071,598 46.21%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Surety

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.17% $136,585.00 $169,654.00 $0.00 $52,415.00 30.90%
Missouri Total 100.00% $78,550,219 $78,072,741 $60,653,909 $61,259,839 78.47%



ARCH INSURANCE COMPANY

2010 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 0.00% 0 $0.00 $0.00 $0.00 $0.00 $-4,865.00 0.00%
Missouri Total 100.00% 11,102,573 $7,586,272,242 $7,567,880,063 $6,265,933 $5,759,414,503 $5,811,825,025 76.80%



ARCH INSURANCE COMPANY

2010 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 0.39% $1,710,234.00 $1,897,557.00 $378,173.00 $720,583.00 37.97%
Missouri Total 100.00% $441,308,880 $445,808,731 $254,777,010 $244,015,159 54.74%



ARCH INSURANCE COMPANY

2010 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 0.04% $156,286.00 $164,691.00 $0.00 $82,528.00 50.11%
Missouri Total 100.00% $349,246,553 $338,155,359 $205,023,769 $184,332,393 54.51%



ARCH INSURANCE COMPANY

2010 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 0.00% 0 $0.00 $0.00 $0.00 $0.00 $-4,865.00 0.00%
Missouri Total 100.00% 2,176,302 $2,308,875,064 $2,296,170,765 $5,930,159 $1,655,951,475 $1,687,995,007 73.51%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Total Private Passenger Automobile

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.00% $0.00 $0.00 $-350.00 $-350.00 0.00%
Missouri Total 100.00% $2,887,388,073 $2,866,814,132 $1,730,926,545 $1,670,104,975 58.26%



ARCH INSURANCE COMPANY

2010 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 0.16% $13,138,059.00 $13,186,937.00 $3,012,490.00 $4,174,438.00 31.66%
Missouri Total 100.00% $8,368,410,476 $8,301,280,585 $4,890,271,388 $4,773,232,479 57.50%



ARCH INSURANCE COMPANY

2010 Supplemental Data for

Property & Casualty

Umbrella

Market_Share Direct Premium Written Direct Premium Earned Direct Losses Paid Direct Losses Incurred Loss Ratio
Company Total 0.50% $297,688.00 $338,871.00 $0.00 $0.00 0.00%
Missouri Total 100.00% $58,973,738 $51,391,262 $51,288,581 $42,930,183 83.54%



ARCH INSURANCE COMPANY

2010 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 14.41% $828,641.00 $464,943.00 $39,778.00 $43,127.00 9.28%
Missouri Total 100.00% $5,749,016 $6,553,354 $4,013,423 $3,084,112 47.06%



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