X0306 4 2014-08-15 0 0000315293 Aon plc AON 0001407939 Besio Gregory J C/O AON CORPORATE LAW DEPT 200 EAST RANDOLPH STREET, 8TH FL CHICAGO IL 60601 0 1 0 0 EVP/Chief HR Officer Class A Ordinary Shares 2014-08-15 4 S 0 10000 85.346 D 57821.34 D The sales reported in this Form 4 were effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $85.17 to $85.49, inclusive. The reporting person undertakes to provide to Aon plc, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Matthew M. Rice - by Matthew M. Rice pursuant to a power of attorney from Gregory J. Besio 2014-08-19