Aon plc — Director's Dealing 2013

Mar 4, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Aon plc (AON)
CIK: 0000315293
Period of Report: 2013-02-28

Reporting Person: O'Connor Michael J (ARS - COO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-02-28	Class A Ordinary Shares	S	8100	$61.651	Disposed	65632	Direct
2013-02-28	Class A Ordinary Shares	M	16500	—	Acquired	82132	Direct
2013-02-28	Class A Ordinary Shares	F	7746	$61.09	Disposed	74386	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-02-28	Restricted Stock Unit Award (Right to Receive)	$	M	16500	Disposed	2013-02-28	Class A Ordinary Shares (16500)	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 $61.63 to $61.655, 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.

F2: Class A Ordinary Shares acquired upon the vesting of a restricted stock unit award.

F3: Class A Ordinary Shares withheld by the issuer for the payment of withholding taxes in connection with the vesting of a restricted stock unit award.

F4: The restricted stock unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with U.K. law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.

F5: The restricted stock unit award will vest in accordance with the terms of the Aon Stock Incentive Plan as follows: 17,000 restricted stock units will vest on February 28, 2011, and 16,500 restricted stock units will vest on each of February 28, 2012 and February 28, 2013.