Aon: Leader in human resources, reinsurance & risk
Aon Corporate Information

Corporate Information

Aon plc Global Headquarters
8 Devonshire Square
London, England EC2M 4PL
(44) 20 7623 5500

Contact Shareholder Relations
Aon plc
c/o Investor Relations
200 East Randolph
Chicago, IL  60601
1.866.657.8632 (within the U.S. and Canada)
Outside the U.S. and Canada: 312.381.1052

Stock Trading
Aon plc's common stock is listed on the New York Stock Exchange.
Ticker symbol: AON

Transfer Agent and Dividend Reinvestment Services Administrator
P.O. Box 43069
Providence, RI 02940-3069

Within the U.S. and Canada: (800) 446-2617
Outside the U.S. and Canada: (781) 575-2723
TDD/TTY for hearing impaired: (800) 952-9245

Independent Registered Public Accounting Firm
Ernst & Young LLP