Sec Form 4 Filing - BUNGERT MICHAEL G @ AON CORP - 2007-01-01

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 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 (MM/DD/YY) 01/01/2007 (Street) CHICAGO, IL60601 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 01/01/2007 M( 1 ) 4,500 A 104,097 ( 2 ) D Common Stock 01/01/2007 F( 3 ) 1,326 D $ 35.28 102,771 ( 2 ) D Common Stock 01/01/2007 M( 1 ) 2,250 A 105,021 ( 2 ) D Common Stock 01/01/2007 F( 3 ) 663 D $ 35.28 104,358 ( 2 ) D Common Stock 01/01/2007 M( 1 ) 2,250 A 106,608 ( 2 ) D Common Stock 01/01/2007 F( 3 ) 803 D $ 35.28 105,805 ( 2 ) D Common Stock 01/01/2007 M( 1 ) 2,250 A 108,055 ( 2 ) D Common Stock 01/01/2007 F( 3 ) 695 D $ 35.28 107,360 ( 2 ) D Common Stock 01/02/2007 M( 1 ) 2,250 A 109,610 ( 2 ) D Common Stock 01/02/2007 F( 3 ) 663 D $ 35.28 108,947 ( 2 ) D Common Stock 01/02/2007 M( 1 ) 2,250 A 111,197 ( 2 ) D Common Stock 01/02/2007 F( 3 ) 663 D $ 35.28 110,534 ( 2 ) D Common Stock 01/02/2007 M( 1 ) 2,250 A 112,784 ( 2 ) D Common Stock 01/02/2007 F( 3 ) 663 D $ 35.28 112,121 ( 2 ) D Common Stock 01/02/2007 M( 1 ) 4,500 A 116,621 ( 2 ) D Common Stock 01/02/2007 F( 3 ) 1,326 D $ 35.28 115,295 ( 2 ) D Common Stock 23,289 I Through Aon Savings Plan and ESOP

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/01/2007 M 4,500 01/01/2007 01/01/2007 Common Stock 4,500 $ 0 0 D Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/01/2007 M 2,250 01/01/2007 01/01/2007 Common Stock 2,250 $ 0 4,500 D Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/01/2007 M 2,250 01/01/2007 01/01/2007 Common Stock 2,250 $ 0 6,750 D Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/01/2007 M 2,250 01/01/2007 01/01/2007 Common Stock 2,250 $ 0 9,000 D Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/02/2007 M 2,250 01/02/2007 01/02/2007 Common Stock 2,250 $ 0 11,250 D Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/02/2007 M 2,250 01/02/2007 01/02/2007 Common Stock 2,250 $ 0 13,500 D Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/02/2007 M 2,250 01/02/2007 01/02/2007 Common Stock 2,250 $ 0 15,750 D Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/02/2007 M 4,500 01/02/2007 01/02/2007 Common Stock 4,500 $ 0 18,000 D Restricted Stock Unit Award (Right to Receive) ( 4 ) 01/01/2007 A 10,000 01/01/2010( 5 ) 01/01/2017 Common Stock 10,000 $ 0 10,000 D Employee Stock Option (Right to Buy) $ 35.28 01/01/2007 A 60,000 ( 6 ) 01/01/2017 Common Stock 60,000 ( 7 ) 60,000 D Phantom Stock (Deferred Stock Awards) ( 8 ) ( 9 ) ( 9 ) Common Stock 85,402 ( 10 ) 85,402 ( 10 ) 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, IL60601 Aon Re Inc. - President/CEO Signatures /s/ Jennifer L. Kraft - Jennifer L. Kraft pursuant to a power of attorney from Michael G. Bungert 01/04/2007 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares of common stock acquired upon the vesting of a restricted stock award. ( 2 )Includes 1,165 shares 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 unit 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 )Vesting will occur in accordance with the Aon Stock Incentive Plan as follows: one-third of the options will vest on each of the second, third and fourth anniversaries of the date of grant. ( 7 )Stock option granted pursuant to the Aon Stock Incentive Plan. ( 8 )The phantom shares convert to shares of common stock on a 1-for-1 basis. ( 9 )The phantom shares represent vested award shares of which the reporting person has deferred receipt. ( 10 )Represents the phantom share balance as of December 31, 2006.

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 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).

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