Aon plc — Director's Dealing 2011

Jun 3, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AON CORP (AOC)
CIK: 0000315293
Period of Report: 2011-06-01

Reporting Person: KALFF JAN (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-06-01	Common Stock	M	2098	—	Acquired	7042	Direct
2011-06-01	Common Stock	F	629	$51.47	Disposed	6413	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-06-01	Deferred Stock Unit Award (Right to Receive)	$	M	2098	Disposed	2011-06-01	Common Stock (2098)	Direct

Footnotes

F1: Shares of common stock acquired upon the vesting of a deferred stock unit award.

F2: Includes shares of common stock acquired pursuant to dividend reinvestment.

F3: The deferred stock unit award converts to shares of common stock on a 1-for-1 basis.

F4: Shares of common stock withheld by the issuer for the payment of withholding taxes in connection with the vesting of a restricted stock unit award.