INSURANCE 
REINSURANCE

Reinsurance is essentially insurance for insurance companies. It is a way for primary insurers to protect against unforeseen or extraordinary losses. Reinsurance also serves to limit liability on specific risks, to increase individual insurers’ capacity to write business, and to help insurers stabilize their business in the face of the wide swings in profit and loss margins that are inherent in the insurance business.

Reinsurance is an international business. According to the Reinsurance Association of America, 56.3 percent of the reinsurance purchased by U.S insurance companies was written by foreign reinsurance companies in 2007. If the domicile of the reinsurance company's parent is taken into account, foreign (or foreign-owned) reinsurance companies accounted for 83.4 percent of the market. This is because many U.S. reinsurance companies are owned by foreign firms.
TOP TEN P/C REINSURERS OF U.S. BUSINESS BY GROSS PREMIUMS WRITTEN, 2007

($000)


Rank

Company

Country of parent company

Gross premiums written
1Swiss Reinsurance America Corporation (1)Switzerland$4,727,165
2Transatlantic/Putnam Reinsurance CompanyU.S.3,945,222
3XL Reinsurance America, Inc. Bermuda3,942,082
4National Indemnity Company (Berkshire Hathaway)U.S.3,924,580
5Munich Re America Corporation (2)Germany3,562,992
6Everest Reinsurance CompanyBermuda3,061,616
7Odyssey America Reinsurance Corporation/Odyssey (3)Canada2,104,818
8Berkley Insurance CompanyU.S.1,610,663
9General Re Group (4)U.S.1,594,010
10Folksamerica Reinsurance Company (White Mountains Insurance Group, Ltd.)U.S.1,137,482
 Total, top ten reinsurers$29,610,630
 Total, all reinsurers$35,923,522
(1) Includes the combined results of Swiss Reinsurance America Corporation and Employers Reinsurance Corporation.
(2) Includes Munich Reinsurance America, Inc., American Alternative Insurance Corporation and The Princeton Excess and Surplus Lines Insurance Company.
(3) Includes Odyssey America Reinsurance Corporation, Clearwater Insurance Company, Hudson Insurance Company, Hudson Specialty Insurance Company and Clearwater Select Insurance Company.
(4) Data are for the North American Property/Casualty segment of the General Re Group.

Source: Reinsurance Association of America.