PEMBROKE, Bermuda, July 8 /PRNewswire/ --

Allied World Assurance Company Holdings, Ltd (NYSE: AWH) today announced that
it will release its financial results for the second quarter ended June 30,
2009, after the close of market on Thursday, August 6, 2009.

Scott Carmilani, President and Chief Executive Officer, and Joan Dillard, Chief
Financial Officer, will host a conference call on Friday, August 7, 2009, at
8:30 am (Eastern Time) to discuss the second quarter 2009 financial results.
This call will include a question and answer session.

The conference call can be accessed by dialing 1-866-713-8563 (U.S. and Canada
callers) or +1-617-597-5311 (international callers) and entering the passcode
90724924 approximately ten minutes prior to the call. A live webcast of the call
will be available online at www.awac.com. A replay of the call will be available
through Friday, August 21, 2009 by dialing 1-888-286-8010 (U.S. and Canada
callers) or +1-617-801-6888 (international callers) and entering the passcode
76678076. In addition, the webcast will remain available online through Friday,
August 21, 2009 at www.awac.com.

About Allied World Assurance Company

Allied World Assurance Company Holdings, Ltd, through its subsidiaries, is a
global provider of innovative property, casualty and specialty insurance and
reinsurance solutions, offering superior client service through offices in
Bermuda, the United States, Europe and Hong Kong. Our insurance and reinsurance
subsidiaries are rated A (Excellent) by A.M. Best Company. For further
information on Allied World, please visit our website at www.awac.com.

SOURCE: Allied World Assurance Company Holdings, Ltd

Media, Faye Cook, Vice President, Marketing Communications, +1-646-794-0543,
faye.cook@awac.com; or investors, Keith J. Lennox, Investor Relations Officer,
+1-646-794-0750, keith.lennox@awac.com, both of Allied World Assurance Company
Holdings