Aon plc — Director's Dealing 2010

Mar 1, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AON CORP (AOC)
CIK: 0000315293
Period of Report: 2010-02-25

Reporting Person: Davies Christa (EVP and CFO)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2010-02-25	Restricted Stock Unit Award (Right to Receive)	$	A	12381	Acquired	2013-02-25	Common Stock (12381)	Direct

Footnotes

F1: The restricted stock unit award converts to shares of common stock on a 1-for-1 basis.

F2: The restricted stock unit award will vest in accordance with the terms of the Aon Stock Incentive Plan as follows: 33 1/3% of the awards will vest on each of the first through third anniversaries of the date of grant.