How does Irish law affect Aon (AON) director share grants?

Irish law requires that the director pay the issuer the nominal value of US $0.01 per share for the granted stock. This nominal payment applies to the Class A Ordinary Shares awarded annually to each non-employee director of Aon plc.

Aon (NYSE: AON) director granted 776 shares with 186 withheld for taxes

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Aon plc director Richard C. Notebaert reported routine equity compensation activity. He received a grant of 776 Class A Ordinary Shares, described as the annual share grant to each non-employee director. Under Irish law, he agreed to pay the issuer the nominal value of US $0.01 per share.

On the same date, 186.235 Class A Ordinary Shares were withheld by the issuer to cover taxes related to the award, a tax-withholding disposition rather than an open-market sale. Following these transactions, he directly holds 28,513.97 Class A Ordinary Shares.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider NOTEBAERT RICHARD C

Role null

Type	Security	Shares	Price	Value
Grant/Award	Class A Ordinary Stock	776	$0.00	--
Tax Withholding	Class A Ordinary Stock	186.235	$315.95	$59K

Holdings After Transaction: Class A Ordinary Stock — 28,513.97 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: 186.235 Class A Ordinary Shares Holdings after transactions: 28,513.97 Class A Ordinary Shares +1 more

4 metrics

Shares granted 776 Class A Ordinary Shares Annual grant to non-employee director

Shares withheld for taxes 186.235 Class A Ordinary Shares Withheld by issuer for tax obligations on award

Holdings after transactions 28,513.97 Class A Ordinary Shares Direct ownership following June 25, 2026 activity

Award nominal value per share US $0.01 per share Nominal value paid under Irish law for granted shares

Key Terms

Class A Ordinary Shares, tax-withholding disposition, grant/award acquisition, non-employee director

4 terms

Class A Ordinary Shares financial

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

Class A ordinary shares are a type of ownership stake in a company that typically grants voting rights to shareholders, allowing them to have a say in important company decisions. They often come with priority in receiving dividends or profits, making them attractive to investors seeking influence and potential income. These shares help distinguish different levels of ownership and rights within a company's stock structure.

tax-withholding disposition financial

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

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 acquisition financial

"transaction_action: "grant/award acquisition" for the 776.0000 share entry."

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 - 05:34 PM Accepted by SEC EDGAR 06/29/2026 - 05:33 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^*

NOTEBAERT RICHARD C

(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⁾	28,513.97	D
Class A Ordinary Stock	06/25/2026		F⁽²⁾		186.235	D	$315.95	28,327.735	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 Richard Notebaert	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 Richard C. Notebaert report in this Form 4?

He reported an annual equity compensation grant of 776 Class A Ordinary Shares and a related tax-withholding disposition of 186.235 shares. These routine entries reflect director compensation rather than discretionary buying or selling in the open market.

Was there an open-market stock sale by Aon (AON) director Notebaert?

No, the Form 4 shows 186.235 shares withheld for taxes, not an open-market sale. The withholding satisfied tax obligations arising from the share award and was executed by the issuer as part of the compensation process.

How many Aon (AON) shares were granted to director Notebaert?

He was granted 776 Class A Ordinary Shares as part of Aon plc’s annual share grant program for non-employee directors. The award was issued at a nominal value of US $0.01 per share under applicable Irish law requirements.

How many Aon (AON) shares were withheld for taxes in this filing?

A total of 186.235 Class A Ordinary Shares were withheld by Aon plc to cover taxes linked to the director’s share award. This reduced the net shares delivered but did not represent a discretionary market sale by the director.

What is Richard C. Notebaert’s Aon (AON) shareholding after these transactions?

After the grant and tax withholding, he directly owns 28,513.97 Class A Ordinary Shares of Aon plc. This figure reflects his updated direct holdings as reported in the Form 4 following the June 25, 2026 transactions.