Aon plc — Director's Dealing 2013

Mar 1, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Aon plc (AON)
CIK: 0000315293
Period of Report: 2013-02-22

Reporting Person: Meissner Laurel G. (SVP & Global Controller)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-02-27	Class A Ordinary Shares	M	9248	$38.93	Acquired	22985	Direct
2013-02-27	Class A Ordinary Shares	S	12748	$60.752	Disposed	10237	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-02-27	Employee Stock Option (Right to Buy)	$9248	M	9248	Disposed	2015-03-19	Class A Ordinary Shares (9248)	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 $60.74 to $60.779, 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: Vesting occurred in accordance with the terms of the Aon Stock Incentive Plan as follows: one-third of the option swill vest on each of the first through third anniversaries of the date of grant.

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

F4: The total shares owned reflects 10 additional shares withheld in connection with the vesting of restricted stock unit on February 25, 2013 to correct a withholding error.