Aon plc — Director's Dealing 2015

May 19, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Aon plc (AON)
CIK: 0000315293
Period of Report: 2015-05-15

Reporting Person: McGill Stephen P (Chairman/CEO - ARS)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-15	Class A Ordinary Share	M	27500	—	Acquired	256776	Direct
2015-05-15	Class A Ordinary Shares	F	11751	$99.550	Disposed	245025	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-05-15	Restricted Share Unit (Right to Receive)	$	M	27500	Disposed	2015-05-15	Class A Ordinary Shares (27500)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Ordinary Shares	150000	Indirect

Footnotes

F1: Class A Ordinary Shares acquired upon the vesting of a restricted stock unit award.

F2: Class A Ordinary Shares withheld by the issuer for the payment of withholding taxes in connection with the settlement of a restricted share unit award.

F3: 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.

F4: The restricted stock unit award vested in accordance with the terms of the Aon Stock Incentive Plan as follows: 20% of the award vested on each of the third and tenth anniversaries of the date of grant, and 10% of the awards vested on each of the fourth through ninth anniversaries of the date of grant.