Aon (NYSE: AON) CFO Reese logs RSU vesting and tax share withholding

Rhea-AI Filing Summary

Aon plc Chief Financial Officer Edmund Reese reported routine equity compensation activity involving restricted share units. On July 1, 2026, a restricted share unit award vested, converting into 3,975 Class A Ordinary Shares on a 1-for-1 basis under the Aon plc 2011 Incentive Compensation Plan.

In connection with this vesting, 2,198.112 Class A Ordinary Shares were withheld by Aon to cover tax obligations at a reference price of $343.56 per share, rather than sold in the open market. Following these transactions, Reese directly owns 6,099.081 Class A Ordinary Shares.

Insider Trade Summary

3,975 shares exercised/converted

Mixed 3 txns

Insider Reese Edmund

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Share Unit (Right to Receive)	3,975	$0.00	--
Exercise	Class A Ordinary Stock	3,975	$0.00	--
Tax Withholding	Class A Ordinary Stock	2,198.112	$343.56	$755K

Holdings After Transaction: Restricted Share Unit (Right to Receive) — 3,975 shares (Direct, null); Class A Ordinary Stock — 6,099.081 shares (Direct, null)

Footnotes (1)

1. Class A Ordinary Shares acquired upon the vesting of a restricted share unit award. Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award. 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. A restricted share unit award was granted on July 1, 2024 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan, as amended and restated: 33 1/3% of the award vests on each of the first through third anniversary of the date of grant.

Key Figures

RSUs vested: 3,975 shares Shares withheld for taxes: 2,198.112 shares Reference share price: $343.56 per share +5 more

8 metrics

RSUs vested 3,975 shares Class A Ordinary Shares acquired upon vesting on July 1, 2026

Shares withheld for taxes 2,198.112 shares Withheld by issuer to pay tax on vesting at $343.56/share

Reference share price $343.56 per share Value used for tax-withholding disposition on July 1, 2026

Shares held after transaction 6,099.081 shares Direct Class A Ordinary Share holdings following reported transactions

RSU conversion ratio 1-for-1 Each restricted share unit converts into one Class A Ordinary Share

Nominal value per share $0.01 per share Amount payable to issuer for each share issued under Irish law

RSU grant date July 1, 2024 Grant date of restricted share unit award under 2011 Incentive Plan

RSU expiration date July 1, 2027 Expiration date shown for the restricted share unit award

Key Terms

restricted share unit, Aon plc 2011 Incentive Compensation Plan, Class A Ordinary Shares, taxes in connection with the vesting, +1 more

5 terms

restricted share unit financial

"Restricted share unit award was granted on July 1, 2024 and vests..."

A restricted share unit (RSU) is a promise by a company to give an employee a set number of company shares at a future date, typically after meeting time or performance conditions. For investors, RSUs matter because when they convert into actual shares they increase the number of shares outstanding (like unlocking more tickets in a game), which can dilute existing holders, and they align employee incentives with company performance, influencing behavior and long-term value.

Aon plc 2011 Incentive Compensation Plan financial

"vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan..."

Class A Ordinary Shares financial

"The restricted share unit award converts to Class A Ordinary Shares on a 1-for-1 basis."

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.

taxes in connection with the vesting financial

"Shares withheld by the issuer for payment of taxes in connection with the vesting of the award."

nominal value financial

"the reporting person agreed to pay the issuer the nominal value of $0.01 per share"

Nominal value is the stated or face amount assigned to a financial instrument — for shares it’s the par value printed on the stock certificate, and for money or returns it can mean the number not adjusted for inflation. Think of it like a price tag on an item versus its buying power: the tag tells you the label, but not how much you can actually buy. Investors care because nominal values affect accounting, legal capital, dividend calculations and comparisons over time when inflation may distort real worth.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/06/2026 - 06:03 PM Accepted by SEC EDGAR 07/06/2026 - 06:02 PM Learn about SEC filing dates

FAQ

What did Aon (AON) CFO Edmund Reese report in this Form 4 filing?

Aon CFO Edmund Reese reported the vesting of a restricted share unit award into 3,975 Class A Ordinary Shares and related tax share withholding. These are routine compensation-related transactions rather than open-market stock purchases or sales.

How many Aon (AON) shares vested for CFO Edmund Reese on July 1, 2026?

On July 1, 2026, 3,975 restricted share units for Edmund Reese vested into an equal number of Class A Ordinary Shares. The award vests in three equal annual installments under the Aon plc 2011 Incentive Compensation Plan.

Were any Aon (AON) shares sold by CFO Edmund Reese in the market?

The filing shows 2,198.112 shares were withheld by Aon to pay taxes at about $343.56 per share. This is a tax-withholding disposition, not an open-market sale initiated by the CFO to trade shares for cash.

What is Edmund Reese’s direct Aon (AON) share ownership after these transactions?

After the vesting and tax withholding, Edmund Reese directly holds 6,099.081 Class A Ordinary Shares. This reflects his updated equity position following the compensation-related transactions reported in the Form 4.

How is the Aon (AON) restricted share unit award structured for Edmund Reese?

The restricted share unit award was granted on July 1, 2024 and converts to Class A Ordinary Shares on a 1-for-1 basis. One-third vests on each of the first, second, and third anniversaries of the grant date under the 2011 Incentive Compensation Plan.

What is the nominal value per Aon (AON) share in this RSU award?

The filing notes that, under Irish law, Edmund Reese agreed to pay Aon a nominal value of $0.01 per share issued in connection with the restricted share unit award. This nominal amount applies to each share delivered upon vesting.

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^*

Reese Edmund

(Last) (First) (Middle)

200 E. 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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

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)
			Code	V	Amount	(A) or (D)	Price
Class A Ordinary Stock	07/01/2026		M(1)		3,975	A	(1)	6,099.081	D
Class A Ordinary Stock	07/01/2026		F(2)		2,198.112	D	$343.56	3,900.969	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Share Unit (Right to Receive)	(3)	07/01/2026		M			3,975	(4)	07/01/2027(4)	Class A Ordinary Shares	3,975	$0	3,975	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 $0.01 per share issued to the reporting person.

4. A restricted share unit award was granted on July 1, 2024 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan, as amended and restated: 33 1/3% of the award vests on each of the first through third anniversary of the date of grant.

	/s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Edmund Reese	07/06/2026
	** 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)