SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Clement Philip (Last) (First) (Middle) AON CORPORATION - CORPORATE LAW DEPT 200 EAST RANDOLPH STREET, 8TH FLOOR (Street) CHICAGO IL 60601 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 11/19/2010	3. Issuer Name and Ticker or Trading Symbol AON CORP [ AOC ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) CMO	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	23,637	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Unit Award (Right to Receive)	03/13/2011	03/13/2011	Common Stock	1,238	(1)	D
Restricted Stock Unit Award (Right to Receive)	02/20/2011	02/20/2012	Common Stock	1,745(2)	(1)	D
Restricted Stock Unit Award (Right to Receive)	02/25/2011	02/25/2013	Common Stock	4,696(3)	(1)	D
Employee Stock Option (Right to Buy)	(4)	03/16/2012	Common Stock	7,206	$41.195	D
Employee Stock Option (Right to Buy)	(4)	03/15/2013	Common Stock	10,782	$37.1	D
Employee Stock Option (Right to Buy)	(5)	03/13/2014	Common Stock	10,267	$40.91	D
Employee Stock Option (Right to Buy)	(6)	03/19/2015	Common Stock	15,413	$38.93	D

Explanation of Responses:

1. The restricted stock unit award will convert to shares of Aon common stock on a 1-for-1 basis.

2. Of this amount, 873 restricted stock units will vest on February 20, 2011, and 872 restricted stock units will vest on February 20, 2012.

3. Of this amount, 1,566 restricted stock units will vest on February 25, 2011, and 1,565 restricted stock units will vest on each of February 25, 2012 and February 25, 2013.

4. The options are exercisable immediately.

5. Of the shares represented by this option, 6,845 are exercisable immediately. The remaining 3,422 options vest on March 13, 2011.

6. Of the shares represented by this option, 5,138 are exercisable immediately. Of the remaining options, 5,138 options vest on March 19, 2011, and 5,137 vest on March 19, 2012.

	/s/ Jennifer L. Kraft - Jennifer L. Kraft pursuant to a power of attorney from Philip Clement	11/29/2010
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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