The 50 Largest Reinsurers

From AM Best, these are the 50 largest reinsurers in terms of gross premiums written in 2010 (in millions).

1. Munich Reinsurance Company—$31,280

2. Swiss Reinsurance Company Limited—24,756

3. Hannover Rueckversicherung AG—15,147

4. Berkshire Hathaway Inc. —14,374

5. Lloyd’s—12,977

6. SCOR S.E. — 8,872

7. Reinsurance Group of America Inc. — 7,201

8. Allianz S.E. — 5,736

9. PartnerRe Ltd.— 4,881

10. Everest Re Group Ltd. —4,201

11. Transatlantic Holdings Inc. —4,133

12. Korean Reinsurance Company —4,114

13. China Reinsurance (Group) Corporation —3,796

14. London Reinsurance Group Inc. —3,266

15. MAPFRE RE, Compania de Reaseguros, S.A. —3,143

16. General Insurance Corporation of India —2,573

17. Assicurazioni Generali SpA —2,463

18. AEGON N.V. —2,391

19. QBE Insurance Group Limited —2,280

20. XL Group plc—2,255

21. MS&AD Insurance Group Holdings Inc.—2,206

22. The Toa Reinsurance Company Limited—2,021

23. Axis Capital Holdings Limited—1,834

24. Caisse Centrale de Reassurance—1,814

25. Odyssey Re Holdings Corp.—1,625

26. Tokio Marine Holdings Inc.—1,466

27. Catlin Group Limited—1,290

28. RenaissanceRe Holdings Ltd.—1,165

29. Aspen Insurance Holdings Limited—1,162

30. ACE Limited—1,146

31. Validus Holdings Ltd.—1,101

32. Flagstone Reinsurance aHoldings Limited—1,098

33. White Mountains Insurance Group, Ltd.—1,079

34. Amlin plc—1,004

35. Manulife Financial Corporation—972

36. American Agricultural Insurance Company—941

37. Endurance Specialty Holdings Ltd.—941

38. Alterra Capital Holdings Ltd.—892

39. Arch Capital Group Ltd.—875

40. IRB – Brasil Resseguros S.A.—780

41. Platinum Underwriters Holdings Ltd.—780

42. ACR Capital Holdings Pte, Ltd.—752

43. Montpelier Re Holdings Ltd.—720

44. NKSJ Holdings Inc.—690

45. Ariel Holdings Ltd.—644

46. Sun Life Financial Inc.—554

47. Maiden Holdings Ltd.—554

48. Allied World Assurance Company Holdings, AG—524

49. Central Reinsurance Corporation—457

50. W. R. Berkley Corporation—425