A.M. Best Assigns Rating to Allied World Assurance Company Holdings, Ltd's Senior Notes

OLDWICK, N.J., Nov 12, 2010 (BUSINESS WIRE) -- A.M. Best Co. has assigned a debt rating of "bbb" to the recently issued $300 million 5.5% senior unsecured notes due 2020 of Allied World Assurance Company Holdings, Ltd (Allied World) (Bermuda) (NYSE: AWH). The assigned outlook is stable.

The proceeds from the debt offering will be used for general corporate purposes.

The debt-to-adjusted capital ratio and fixed charge coverage remain comfortably within the range that is commensurate with the assigned rating.

Allied World is a diversified property/casualty insurer/reinsurer with significant geographic reach. The company has strong risk-adjusted capitalization, an experienced management team and a historically strong operating performance.

The principal methodology used in determining these ratings is Best's Credit Rating Methodology -- Global Life and Non-Life Insurance Edition, which provides a comprehensive explanation of A.M. Best's rating process and highlights the different rating criteria employed. Additional key criteria utilized include: "Risk Management and the Rating Process for Insurance Companies"; "Understanding BCAR for Property/Casualty Insurers"; and "A.M. Best's Ratings & the Treatment of Debt." Methodologies can be found at www.ambest.com/ratings/methodology.

Founded in 1899, A.M. Best Company is the world's oldest and most authoritative insurance rating and information source. For more information, visit www.ambest.com.

SOURCE: A.M. Best Co.

CONTACT: A.M. Best Co. Greg Reisner, 908-439-2200, ext. 5224 Senior Financial Analyst greg.reisner@ambest.com or Robert DeRose, 908-439-2200, ext. 5453 Vice President robert.derose@ambest.com or Rachelle Morrow, 908-439-2200, ext. 5378 Senior Manager, Public Relations rachelle.morrow@ambest.com or Jim Peavy, 908-439-2200, ext. 5644 Assistant Vice President, Public Relations james.peavy@ambest.com Copyright Business Wire 2010 -0- KEYWORD: United States



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