SEC Form 4
FORM 4 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
or Section 30(h) of the Investment Company Act of 1940
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
1. Name and Address of Reporting Person*
LIEB PETER M

(Last) (First) (Middle)
AON CORPORATION - CORPORATE LAW DEPT
200 EAST RANDOLPH STREET, 8TH FLOOR

(Street)
CHICAGO IL 60601

(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
Aon plc [ AON ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
EVP & General Counsel
3. Date of Earliest Transaction (Month/Day/Year)
07/15/2012
4. 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 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
Class A Ordinary Shares 07/15/2012 M (1) 11,667 A (1) 15,854.82 (3) D
Class A Ordinary Shares 07/15/2012 F (2) 4,835 D $47.63 11,019.82 D
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 Securities Underlying Derivative Security (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: 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) 07/15/2012 M 11,667 07/15/2012 07/15/2012 Class A Ordinary Shares 11,667 $0 23,333 D
Phantom Stock (5) 07/15/2012 A 6.83 (6) (6) Class A Ordinary Shares 6.83 $47.63 1,604.93 D
Explanation of Responses:
1. Class A Ordinary Shares acquired upon the vesting of a restricted stock unit award.
2. Class A Ordinary Shares withheld by the issuer for the payment of withholding taxes in connection with the vesting of a restricted stock unit award.
3. Includes shares acquired pursuant to dividend reinvestment and Includes 188.632 shares acquired under the Aon employee stock purchase plan.
4. The restricted stock unit award converts to Class A Ordinary Shares on a 1-for-1 basis.
5. Each share of phantom stock acquired under the issuer's deferred compensation plan represents the right to receive the cash value thereof.
6. Shares of phantom stock are payable in cash in ten annual installments following the reporting person's retirement. Subject to the issuer's compliance procedures for its Section 16 reporting officers, the reporting person may transfer Class A Ordinary Shares into an alternative investment account under the issuer's deferred compensation plan.
/s/ Matthew M. Rice - by Matthew M. Rice pursuant to a power of attorney from Peter Lieb 07/16/2012
** 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 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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