Was the Aon (AON) director’s share disposition an open-market sale?

No, the disposition was not an open-market sale. Aon plc withheld 396.524 Class A Ordinary shares solely to pay taxes associated with the equity award, a standard tax-withholding mechanism rather than a discretionary market transaction by director Jin-Yong Cai.

What is the nature of the 776-share award reported by Aon (AON)?

The 776 shares are an annual grant of Class A Ordinary Shares to a non-employee director of Aon plc. According to the disclosure, Irish law requires the reporting person to pay the issuer a nominal value of US $0.01 per share issued under this award.

Aon (AON) director Jin-Yong Cai gets share grant with tax shares withheld

Filing Impact

(Moderate)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Aon plc director Jin-Yong Cai reported routine equity compensation activity. On Class A Ordinary Stock, 776 shares were granted as an annual award to a non-employee director, with the director agreeing under Irish law to pay the issuer a nominal value of US $0.01 per share. On the same date, 396.524 shares were withheld by Aon to cover tax obligations related to the award, a non-market transaction classified as a tax-withholding disposition. After these transactions, Cai directly owned a total of 8,241.376 Class A Ordinary shares.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Cai Jin-Yong

Role null

Type	Security	Shares	Price	Value
Grant/Award	Class A Ordinary Stock	776	$0.00	--
Tax Withholding	Class A Ordinary Stock	396.524	$315.95	$125K

Holdings After Transaction: Class A Ordinary Stock — 8,241.376 shares (Direct, null)

Footnotes (1)

Class A Ordinary Shares granted annually to each non-employee director of Aon plc. In accordance with Irish law, reporting person agreed to pay the issuer the nominal value of US $0.01 per share issued to the reporting person. Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the award.

Key Figures

Shares granted: 776 Class A Ordinary shares Shares withheld for taxes: 396.524 shares Post-transaction holdings: 8,241.376 shares +2 more

5 metrics

Shares granted 776 Class A Ordinary shares Annual non-employee director award on 2026-06-25

Shares withheld for taxes 396.524 shares Withheld by issuer for tax obligations on award date

Post-transaction holdings 8,241.376 shares Direct Class A Ordinary Stock held after transactions

Tax-withheld price reference $315.95 per share Price per share used for 396.524-share tax withholding

Tax-withholding shares count 396.524 shares Classified as tax-withholding disposition (code F)

Key Terms

Class A Ordinary Stock, tax-withholding disposition, Grant, award, or other acquisition, non-employee director, +1 more

5 terms

Class A Ordinary Stock financial

"security_title: "Class A Ordinary Stock""

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Grant, award, or other acquisition financial

"transaction_code_description: "Grant, award, or other acquisition""

non-employee director financial

"Class A Ordinary Shares granted annually to each non-employee director of Aon plc."

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/29/2026 - 05:28 PM Accepted by SEC EDGAR 06/29/2026 - 05:28 PM

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Cai Jin-Yong

(Last)

(First)

(Middle)

200 EAST RANDOLPH ST.

(Street)

CHICAGO

ILLINOIS

60601

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Aon plc [ AON ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/25/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Ordinary Stock	06/25/2026		A⁽¹⁾		776	A	⁽¹⁾	8,241.376	D
Class A Ordinary Stock	06/25/2026		F⁽²⁾		396.524	D	$315.95	7,844.852	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Class A Ordinary Shares granted annually to each non-employee director of Aon plc. In accordance with Irish law, reporting person agreed to pay the issuer the nominal value of US $0.01 per share issued to the reporting person.

2. Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the award.

	/s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Jin-Yong Cai	06/29/2026
	** 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What did Aon (AON) director Jin-Yong Cai report in this Form 4?

Jin-Yong Cai reported an annual equity grant and related tax withholding. He received 776 Class A Ordinary shares as a non-employee director award and had 396.524 shares withheld by Aon plc to cover tax liabilities tied to that award.

How many Aon (AON) shares does Jin-Yong Cai hold after these transactions?

After the reported transactions, Jin-Yong Cai directly holds 8,241.376 Class A Ordinary shares of Aon plc. This figure reflects both the 776-share award he received and the 396.524 shares withheld by the issuer for tax obligations on the same date.

What transaction codes are used in this Aon (AON) Form 4 and what do they mean?

The Form 4 uses code “A” for a grant or award acquisition of 776 shares and code “F” for a tax-withholding disposition of 396.524 shares. These codes indicate compensation-related activity rather than open-market buying or selling by director Jin-Yong Cai.