Aon plc — Director's Dealing 2012

Feb 15, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AON CORP (AON)
CIK: 0000315293
Period of Report: 2012-02-13

Reporting Person: Clement Philip (CMO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-13	Common Stock	M	7206	$41.195	Acquired	45288	Direct
2012-02-13	Common Stock	S	12706	$48.8744	Disposed	32582	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-13	Employee Stock Option (Right to Buy)	$41.195	M	7206	Disposed	2012-03-16	Common Stock (7206)	Direct

Footnotes

F1: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.81 to $48.94, inclusive. The reporting person undertakes to provide to Aon Corporation, 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.

F2: Vesting of the options occurred in accordance with the terms of the Aon Stock Incentive Plan as follows: 33.34% of the options will vest on the first anniversary of the date of grant, and 33.33% of the options will vest on each of the second and third anniversaries of the date of grant. The date of grant was March 16, 2006.

F3: Stock option granted pursuant to the Aon Stock Incentive Plan.