Davis Polk advised Morgan Stanley & Co. Incorporated and Merrill Lynch, Pierce, Fenner & Smith Incorporated in connection with the public offering by Aon Corporation of $500 million aggregate principal amount of 3.125% senior notes due 2016.

Aon Corporation provides risk management services, insurance and reinsurance brokerage, and human resource consulting and outsourcing, delivering distinctive client value via innovative and effective risk management and workforce productivity solutions.

The Davis Polk corporate team included partner John G. Crowley, associates Britton M. Sellers and Roman Ajzen and summer associate Jennifer Azambuja. Partner Samuel Dimon and associate Aharon Illouz provided tax advice. Natalie Chan was the legal assistant on the transaction. All members of the Davis Polk team are based in the New York office.