MONTREAL (December 4, 2009) - On December 2, Aon's Montreal office - which houses all of Aon's commercial operations in Québec, including Aon Consulting, Aon Parizeau/Aon Reed Stenhouse, Aon Minet and Aon Benfield - installed two signs on the roof of its building at 700 De La Gauchetière that clearly affirm its presence in the Quebec community.

With this action, Aon confirms its position in the risk management and brokerage markets, and its role as a leading provider of pension plan, group insurance, human capital and outsourcing consulting all across Québec.

Executives of Aon's business units in Montreal all agree that having a visible signature in the Montreal skyline is an opportunity to share pride in being part of the Aon network with employees and existing and prospective clients.

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About Aon

Aon Corporation (NYSE: AON) is the leading global provider of risk management services, insurance and reinsurance brokerage, and human capital consulting. Through its more than 36,000 colleagues worldwide, Aon readily delivers distinctive client value via innovative and effective risk management and workforce productivity solutions. Aon's industry-leading global resources and technical expertise are delivered locally through more than 500 offices in more than 120 countries. Named the world's best broker by Euromoney magazine's 2008 and 2009 Insurance Survey, Aon also ranked highest on Business Insurance's listing of the world's largest insurance brokers based on commercial retail, wholesale, reinsurance and personal lines brokerage revenues in 2008 and 2009. A.M. Best deemed Aon the number one insurance broker based on brokerage revenues in 2007, 2008, and 2009, and Aon was voted best insurance intermediary, best reinsurance intermediary and best employee benefits consulting firm in 2007, 2008 and 2009 by the readers of Business Insurance. For more information on Aon, log onto http://www.aon.com.

Media Contact:
Autom Tagsa
416-542-5659
autom.tagsa@aon.ca