FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * BUNGERT MICHAEL G   2. Issuer Name and Ticker or Trading Symbol AON CORP [AOC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Aon Re Inc. - President/CEO (Last) (First) (Middle) AON CORPORATION - CORPORATE LAW DEPT, 200 EAST RANDOLPH STREET, 8TH FLOOR 3. Date of Earliest Transaction (Month/Day/Year) 01/01/2006 (Street) CHICAGO, IL 60601 4. If Amendment, Date 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 (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 01/01/2006   M(1)   2,250 A $ 35.97 84,001 (2) D   Common Stock 01/01/2006   F(3)   663 D $ 35.97 83,338 (2) D   Common Stock 01/01/2006   M(1)   2,250 A $ 35.97 85,588 (2) D   Common Stock 01/01/2006   F(3)   663 D $ 35.97 84,925 (2) D   Common Stock 01/01/2006   M(1)   2,250 A $ 35.97 87,175 (2) D   Common Stock 01/01/2006   F(3)   663 D $ 35.97 86,512 (2) D   Common Stock 01/01/2006   M(1)   2,250 A $ 35.97 88,762 (2) D   Common Stock 01/01/2006   F(3)   663 D $ 35.97 88,099 (2) D   Common Stock 01/02/2006   M(1)   4,500 A $ 35.97 92,599 (2) D   Common Stock 01/02/2006   F(3)   1,488 D $ 35.97 91,111 (2) D   Common Stock 01/02/2006   M(1)   2,250 A $ 35.97 93,361 (2) D   Common Stock 01/02/2006   F(3)   663 D $ 35.97 92,698 (2) D   Common Stock 01/02/2006   M(1)   2,250 A $ 35.97 94,948 (2) D   Common Stock 01/02/2006   F(3)   663 D $ 35.97 94,285 (2) D   Common Stock               22,844 I Through Aon Savings Plan and ESOP

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Stock Award (Right to Receive)

(4)

01/01/2006

A

22,500

01/01/2009(5)

01/01/2016

Common Stock

22,500

$ 0

22,500

D

Common Stock

(4)

01/01/2006

M

2,250

01/01/2006

01/01/2006

Common Stock

2,250

$ 0

4,500

D

Common Stock

(4)

01/01/2006

M

2,250

01/01/2006

01/01/2006

Common Stock

2,250

$ 0

6,750

D

Common Stock

(4)

01/01/2006

M

2,250

01/01/2006

01/01/2006

Common Stock

2,250

$ 0

9,000

D

Common Stock

(4)

01/01/2006

M

2,250

01/01/2006

01/01/2006

Common Stock

2,250

$ 0

11,250

D

Common Stock

(4)

01/02/2006

M

4,500

01/02/2006

01/02/2006

Common Stock

4,500

$ 0

13,500

D

Common Stock

(4)

01/02/2006

M

2,250

01/02/2006

01/02/2006

Common Stock

2,250

$ 0

15,750

D

Common Stock

(4)

01/02/2006

M

2,250

01/02/2006

01/02/2006

Common Stock

2,250

$ 0

18,000

D

Phantom Stock (Deferred Stock Awards)

(6)

(7)

(7)

Common Stock

(8)

83,985

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
BUNGERT MICHAEL G AON CORPORATION - CORPORATE LAW DEPT 200 EAST RANDOLPH STREET, 8TH FLOOR CHICAGO, IL 60601			Aon Re Inc. - President/CEO

Signatures

/s/ Jennifer L. Kraft - Jennifer L. Kraft pursuant to a power of attorney from Michael G. Bungert		01/04/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(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).
(1)	Shares of common stock acquired upon the vesting of a restricted stock award.
(2)	Includes 1,155 shares of common stock acquired under the Aon employee stock purchase plan.
(3)	Shares of common stock withheld by the issuer for the payment of withholding taxes in connection with the vesting of a restricted stock award.
(4)	The restricted stock award converts to shares of common stock on a 1-for-1 basis.
(5)	Awards will vest in accordance with the Aon Stock Incentive Plan as follows: 20% of the awards will vest on each of the third and tenth anniversaries of the date of grant, and 10% of the awards will vest on each of the fourth through ninth anniversaries of the date of grant.
(6)	The phantom shares convert to shares of common stock on a 1-for-1 basis.
(7)	The phantom stock represents vested award shares of which the reporting person has previously deferred receipt.
(8)	Represents the phantom share balance as of December 31, 2005.

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