Aon plc — Director's Dealing 2010

Apr 5, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AON CORP (AOC)
CIK: 0000315293
Period of Report: 2010-04-01

Reporting Person: Besio Gregory J (EVP/CAO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-04-01	Common Stock	S	1000	$42.78	Disposed	21576	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	4585	Indirect

Footnotes

F1: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 25, 2010.

F2: Includes 378 shares held through the Aon employee stock purchase plan.