Aon plc — Director's Dealing 2010

Dec 1, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AON CORP (AOC)
CIK: 0000315293
Period of Report: 2010-11-29

Reporting Person: KNIGHT LESTER B (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-11-29	Common Stock	P	25000	$40.5158	Acquired	25000	Indirect
2010-11-30	Common Stock	P	25000	$40.4168	Acquired	40000	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	15000	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $40.4990 to $40.52, inclusive. The reporting person undertakes to provide Aon Corporation ("Aon"), any stockholder of Aon, 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 ranges set forth in this footnote.