Ownership Submission
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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(Print or Type Responses)
1. Name and Address of Reporting Person *
LIEB PETER M
   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)
General Counsel
(Last)
(First)
(Middle)
200 EAST RANDOLPH ST.		 3. Date of Earliest Transaction (Month/Day/Year)
02/15/2018
(Street)

CHICAGO, IL 		 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
Class A Ordinary Stock 02/15/2018   A(1)   26,539 A (1) 42,699.9 D  
Class A Ordinary Stock 02/15/2018   F(2)   11,767 D $ 140.89 30,932.9 D  
Class A Ordinary Stock 02/16/2018   M(3)   885 A (3) 31,817.9 D  
Class A Ordinary Stock 02/16/2018   F(2)   372 D $ 140.86 31,445.9 D  
Class A Ordinary Stock 02/16/2018   M(3)   1,049 A (3) 32,494.9 D  
Class A Ordinary Stock 02/16/2018   F(2)   441 D $ 140.86 32,053.9 D  
Class A Ordinary Stock 02/16/2018   M(3)   845 A (3) 32,898.9 D  
Class A Ordinary Stock 02/16/2018   F(2)   355 D $ 140.86 32,543.9 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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
Restricted Share Unit (Right to Receive) (4) 02/15/2018   A   1,925     (5) 02/15/2021(5) Class A Ordinary Shares 1,925 $ 0 1,925 D  
Restricted Share Unit (Right to Receive) (4) 02/16/2018   M     885   (6) 02/19/2018(6) Class A Ordinary Shares 885 $ 0 0 D  
Restricted Share Unit (Right to Receive) (4) 02/16/2018   M     1,049   (7) 02/18/2019(7) Class A Ordinary Shares 1,049 $ 0 1,049 D  
Restricted Share Unit (Right to Receive) (4) 02/16/2018   M     845   (8) 02/16/2020(8) Class A Ordinary Shares 845 $ 0 1,692 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
LIEB PETER M
200 EAST RANDOLPH ST.
CHICAGO, IL 		       General Counsel  

Signatures

 /s/ Molly Johnson, pursuant to a power of attorney from Peter Lieb   02/20/2018
**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) Represents Class A Ordinary Shares issued upon the settlement of performance share unit awards originally granted approximately three years ago under the tenth cycle of the Company's Leadership Performance Program. The number of shares issued was determined by the Organization and Compensation Committee of the Board of Directors on February 15, 2018, based on the Company's performance for the period from January 1, 2015 to December 31, 2017.
(2) Class A Ordinary Shares withheld by the issuer for payment of withholding taxes in connection with the vesting of the award.
(3) Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.
(4) The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with U.K. law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.
(5) The restricted share unit award vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan as follows: 33 1/3% of the award vests on each of the first through third anniversary of the date of the grant.
(6) A restricted share unit award was granted on February 19, 2015 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 33 1/3% of the award vests on each of the first through third aniversary of the date of grant.
(7) A restricted share unit award was granted on February 18, 2016 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 33 1/3% of the award vests on each of the first through third aniversary of the date of grant.
(8) A restricted share unit award was granted on February 16, 2017 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 33 1/3% of the award vests on each of the first through third aniversary of the date of grant.

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