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
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      
1. Name and Address of Reporting Person * Slyfield Jillian 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)
Chief Innovation Officer
(Last)          (First)          (Middle)
200 E. RANDOLPH ST.
3. Date of Earliest Transaction (MM/DD/YYYY)
5/20/2022
(Street)
CHICAGO, IL 60601
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)
 
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. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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  5/20/2022    M(1)    105  A  (1) 786.492  D   
Class A Ordinary Stock  5/20/2022    F(2)    37  D $262.71  749.492  D   
Class A Ordinary Stock  5/20/2022    M(1)    52  A  (1) 801.492  D   
Class A Ordinary Stock  5/20/2022    F(2)    18  D $262.71  783.492  D   
Class A Ordinary Stock  5/20/2022    M(1)    40  A  (1) 823.492  D   
Class A Ordinary Stock  5/20/2022    F(2)    14  D $262.71  809.492  D   

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 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 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)   (3) 5/20/2022    M        105    (4) 5/21/2023 (4) Class A Ordinary Shares  105  $0.00  105  D   
Restricted Share Unit (Right to Receive)   (3) 5/20/2022    M        52    (5) 5/21/2025 (5) Class A Ordinary Shares  52  $0.00  155  D   
Restricted Share Unit (Right to Receive)   (3) 5/20/2022    M        40    (6) 5/21/2026 (6) Class A Ordinary Shares  40  $0.00  157  D   

Explanation of Responses:
(1)  Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.
(2)  Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.
(3)  The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis. In accordance with Irish law, the reporting person agreed to pay the issuer the nominal value of US$0.01 per share issued to the reporting person.
(4)  A restricted share unit award was granted on May 21, 2018 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 20% of the award vests on each of the first through fifth anniversary of the date of grant.
(5)  A restricted share unit award was granted on May 21, 2020 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 20% of the award vests on each of the first through fifth anniversary of the date of grant.
(6)  A restricted share unit award was granted on May 21, 2021 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 20% of the award vests on each of the first through fifth anniversary of the date of grant.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
Slyfield Jillian
200 E. RANDOLPH ST.
CHICAGO, IL 60601


Chief Innovation Officer

Signatures
/s/ Julie Cho - Julie Cho pursuant to a power of attorney from Jillian Slyfield 5/24/2022
**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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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