Despite 2011 castastrophe losses, thereinsurance sector ended the year with a dedicated capital positionthat was slightly up at around $178 billion. Examining the stablepremium assumed from non-affiliates, PC360 has ranked the top 25U.S. reinsurers for 2011.

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Companies were included if premiumsassumed from non-affiliates were more than 55 percent of grosspremiums or if "Reinsurance," "Reins," or "Re" is part of the name.(Berkley is a member of the Reinsurance Association of America andis therefore included.)

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Click "next" to see the top 25 U.S.Reinsurers based on underwriting results.

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Editor's Note: Theinformation in this slideshow appeared in the July 9/16, 2012 issueof National Underwriter Property & Casualty. For morecomplete information, see the story that appeared in that issuehere.

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|

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25. Allied World ReinsuranceCo.

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Premium Assumed fromNon-Affiliates:

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2011: 241,567

|

2010: 264,221

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Percent change year-over-year:-8.6%

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Combined Ratio:

|

2011: 79.7

|

2010: 83.5

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|

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24. Sirius America InsuranceCo.

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Premium Assumed fromNon-Affiliates:

|

2011: 302,857

|

2010: 275,972

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Percent Change Year-Over-Year: 9.7%

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Combined Ratio:

|

2011: 101.4

|

2010: 106.7

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|

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23. Arch ReinsuranceCo.

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Premium Assumed from Non-Affiliates:

|

2011: 327,691

|

2010: 307,301

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Percent Change Year-Over-Year: 6.6%

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Combined Ratio:

|

2011: 105.5

|

2010: 96

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|

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22. Toa Reinsurance Co. ofAmerica

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Premium Assumed from Non-Affiliates:

|

2011: 360,083

|

2010: 306,374

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Percent Change Year-Over-Year: 17.5%

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Combined Ratio:

|

2011: 94.7

|

2010: 96.6

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21. Agrinational InsuranceCo.

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Premium Assumed from Non-Affiliates:

|

2011: 367,403

|

2010: 198,153

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Percent Change Year-Over-Year: 85.4%

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Combined Ratio:

|

2011: 100.3

|

2010: 99.3

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The largest jump -- from 25 to 21 --was from Agrinational Insurance Co., which booked more than an 85percent increase in premium assumed from non-affiliates.

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|

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20. Platinum Underwriters ReInc.

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Premium Assumed from Non-Affiliates:

|

2011: 382,620

|

2010: 440,017

|

Percent Change Year-Over-Year: -13%

|

Combined Ratio:

|

2011: 101.7

|

2010: 87.1

|

|

|

19. XL Reinsurance AmericaInc.

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Premium Assumed from Non-Affiliates:

|

2011: 390,959

|

2010: 372,539

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Percent Change Year-Over-Year: 4.9%

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Combined Ratio:

|

2011: 114.5

|

2010: 106.9

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|

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18. Alterra Reinsurance USAInc.

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Premium Assumed from Non-Affiliates:

|

2011: 429,856

|

2010: 358,257

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Percent Change Year-Over-Year: 20%

|

Combined Ratio:

|

2011: 102

|

2010: 100.3

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|

|

17. Endurance Re Corp. ofAmerica

|

Premium Assumed from Non-Affiliates:

|

2011: 448,815

|

2010: 453,404

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Percent Change Year-Over-Year: -1%

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Combined Ratio:

|

2011: 121.2

|

2010: 91.5

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|

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16. QBE ReinsuranceCorp.

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Premium Assumed from Non-Affiliates:

|

2011: 482,413

|

2010: 459,851

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Percent Change Year-Over-Year: 4.9%

|

Combined Ratio:

|

2011: 96.2

|

2010: 91.9

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|

|

15. AXIS ReinsuranceCo.

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Premium Assumed from Non-Affiliates:

|

2011: 512, 993

|

2010: 504,251

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Percent Change Year-Over-Year: 1.7%

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Combined Ratio:

|

2011: 99.8

|

2010: 95.1

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|

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14. Berkley InsuranceCo.

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Premium Assumed from Non-Affiliates:

|

2011: 539, 293

|

2010: 458,182

|

Percent Change Year-Over-Year: 17.7%

|

Combined Ratio:

|

2011: 102.2

|

2010: 102.3

|

|

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13. Hartford Steam BoilerInspection & Insurance Co.

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Premium Assumed from Non-Affiliates:

|

2011: 614,470

|

2010: 616,272

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Percent Change Year-Over-Year: -0.3%

|

Combined Ratio:

|

2011: 78.3

|

2010: 80.1

|

|

|

12. Maiden ReinsuranceCo.

|

Premium Assumed from Non-Affiliates:

|

2011: 653,905

|

2010: 662,169

|

Percent Change Year-Over-Year: -1.2%

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Combined Ratio:

|

2011: 104.9

|

2010: 103.5

|

|

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11. SCOR ReinsuranceCo.

|

Premium Assumed from Non-Affiliates:

|

2011: 704,637

|

2010: 609,159

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Percent Change Year-Over-Year: 15.7%

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Combined Ratio:

|

2011: 102.8

|

2010: 101.7

|

|

|

10. American AgriculturalInsurance Co.

|

Premium Assumed from Non-Affiliates:

|

2011: 1,010,337

|

2010: 917,453

|

Percent Change Year-Over-Year: 10.1%

|

Combined Ratio:

|

2011: 130.8

|

2010: 104.5

|

|

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9. General ReinsuranceCorp.

|

Premium Assumed from Non-Affiliates:

|

2011: 1,016,661

|

2010: 1,156,541

|

Percent Change Year-Over-Year: -12.1%

|

Combined Ratio:

|

2011: 94.5

|

2010: 91.4

|

|

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8. Partner Reisurance Co. ofthe U.S.

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Premium Assumed from Non-Affiliates:

|

2011: 1,158,781

|

2010: 880,783

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Percent Change Year-Over-Year: 31.6%

|

Combined Ratio:

|

2011: 99.7

|

2010: 95.4

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7. Odyssey ReinsuranceCo.

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Premium Assumed from Non-Affiliates:

|

2011: 1,517,637

|

2010: 1,399,637

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Percent Change Year-Over-Year: 8.5%

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Combined Ratio:

|

2011: 117.8

|

2010: 93.3

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|

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6. QBE InsuranceCorp.

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Premium Assumed from Non-Affiliates:

|

2011: 2,200,954

|

2010: 87,362

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Percent Change Year-Over-Year: 70.8%

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Combined Ratio:

|

2011: 89.7

|

2010: 108.7

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QBE Insrance, which made a major jumpto appear in the sixth slot, says its upward movement reflects itsacquisition of the insurance portfolio of Balboa Insurance Groupfrom Bank of America in 2011 (it assumed 100 percent of Balboa'sinsurance business).

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|

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5. Munich Reinsurance AmericaInc.

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Premium Assumed from Non-Affiliates:

|

2011: 2,348,333

|

2010: 2,452,724

|

Percent Change Year-Over-Year: -4.3%

|

Combined Ratio:

|

2011: 100.1

|

2010: 91.4

|

|

|

4. Everest ReinsunceCo.

|

Premium Assumed from Non-Affiliates:

|

2011: 2,734,463

|

2010: 2,649,158

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Percent Change Year-Over-Year: 3.2%

|

Combined Ratio:

|

2011: 133.1

|

2010: 107.8

|

|

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3. Transatlantic ReinsuranceCo.

|

Premium Assumed from Non-Affiliates:

|

2011: 3,608,099

|

2010: 3,669,221

|

Percent Change Year-Over-Year: -1.7%

|

Combined Ratio:

|

2011: 115.1

|

2010: 98.5

|

|

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2. Swiss Reinsurance AmericaCorp.

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Premium Assumed from Non-Affiliates:

|

2011: 3,659,745

|

2010: 3,687,818

|

Percent Change Year-Over-Year: -0.8%

|

Combined Ratio:

|

2011: 84.4

|

2010: 87.4

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1. National IndemnityCo.

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Premium Assumed from Non-Affiliates:

|

2011: 4,727,654

|

2010: 3,597,948

|

Percent Change Year-Over-Year: 31.4%

|

Combined Ratio:

|

2011: 111.1

|

2010: 85.8

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A notable difference between this andlast year's list is the fact that Berkshire Hathaway's NationalIndemnity Co. moved from third to first after experiencing a 31percent increase in premium assumed from non-affiliates.

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