FORM 3 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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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1. Name and Address of Reporting Person *
Virani Nadin

(Last) (First) (Middle)
200 EAST RANDOLPH STREET

(Street)
CHICAGO IL 60601

(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
08/17/2026
3. Issuer Name and Ticker or Trading Symbol
Aon plc [ AON ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director 10% Owner
X Officer (give title below) Other (specify below)
Interim CFO
5. 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 Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A Ordinary Stock 1,014.475
D
 
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Restricted Share Unit (Right to Receive) 05/21/2027 (1) 05/21/2027 Class A Ordinary Shares 1,117 (2) D  
Restricted Share Unit (Right to Receive) 05/21/2027 (3) 05/21/2030 Class A Ordinary Shares 893 (2) D  
Explanation of Responses:
1. A restricted share unit award was granted on May 21, 2025 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan, as amended and restated: 50% of the award vests on each of the first through second anniversary of the date of grant.
2. 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 $0.01 per share issued to the reporting person.
3. A restricted share unit award was granted on May 21, 2025 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan, as amended and restated: 20% of the award vests on each of the first through fifth anniversary of the date of grant.
/s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Nadin Virani 08/26/2026
** 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 Number.

ATTACHMENTS / EXHIBITS

ATTACHMENTS / EXHIBITS

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