Allied World Expands Product Capabilities in Asia-Pacific Via Syndicate 2232

ZUG, Switzerland, March 15, 2011 - Allied World Assurance Company Holdings, AG (NYSE: AWH) announced today
that its Lloyd's syndicate, Syndicate 2232, operating though Capita 2232
Services Pte. Ltd., has been authorized to write direct and facultative
casualty and professional lines business from Lloyd's Asia in Singapore, in
addition to its previously announced range of treaty products. Ronak Shah,
Vice President for Direct and Facultative Casualty in Asia-Pacific will be
responsible for the underwriting of these lines of business and will report
to Bruce Ford, Principal Officer of Capita 2232 Services Pte. Ltd. writing on
behalf of Syndicate 2232.

Capita Managing Agency Limited, the Lloyd's and U.K. Financial Services
Authority approved managing agent of Syndicate 2232, received approval last
year from the Monetary Authority of Singapore (MAS) and Lloyd's Asia to
register and operate a service company, Capita 2232 Services Pte. Ltd.
through which Syndicate 2232 underwrites from Singapore. For more information
on capabilities in Asia-Pacifc, please contact Ronak Shah at
ronak.shah@awac.com. For more information on Syndicate 2232, please contact
Darren Powell, Active Underwriter, at darren.powell@awac.com.

About Allied World Assurance Company

Allied World Assurance Company Holdings, AG, through its subsidiaries, is
a global provider of innovative property, casualty and specialty insurance
and reinsurance solutions, offering superior client service through a global
network of branches and affiliates. Our insurance and reinsurance
subsidiaries are rated A (Excellent) by A.M. Best Company, and our Lloyd's
Syndicate 2232 is rated A+ (Strong) by Standard & Poor's and Fitch. Please
visit our website at www.awac.com for further information on Allied
World.

Cautionary Statement Regarding Forward-Looking Statements

Any forward-looking statements made in this press release reflect our
current views with respect to future events and financial performance and are
made pursuant to the safe harbor provisions of the Private Securities
Litigation Reform Act of 1995. Such statements involve risks and
uncertainties, which may cause actual results to differ materially from those
set forth in these statements. For example, our forward-looking statements
could be affected by pricing and policy term trends; increased competition;
the impact of acts of terrorism and acts of war; greater frequency or
severity of unpredictable catastrophic events; negative rating agency
actions; the adequacy of our loss reserves; the company or its subsidiaries
becoming subject to significant income taxes in the United States or
elsewhere; changes in regulations or tax laws; changes in the availability,
cost or quality of reinsurance or retrocessional coverage; adverse general
economic conditions; and judicial, legislative, political and other
governmental developments, as well as management's response to these factors,
and other factors identified in our filings with the U.S. Securities and
Exchange Commission. You are cautioned not to place undue reliance on these
forward-looking statements, which speak only as of the date on which they are
made. We are under no obligation (and expressly disclaim any such obligation)
to update or revise any forward-looking statement that may be made from time
to time, whether as a result of new information, future developments or
otherwise.

Media: Faye Cook, VP, Marketing & Communications, +1-441-278-5406, faye.cook at awac.com or Investors: Keith J. Lennox, Investor Relations Officer, +1-646-794-0750, keith.lennox at awac.com