[Form 4] Aon plc Insider Trading Activity

Rhea-AI Filing Summary

SEC Form 4 snapshot – Aon plc (AON)

Chief Financial Officer Edmund Reese reported RSU-related share activity dated 07/01/2025:

• 3,975 Class A ordinary shares were issued upon vesting of a 2024 restricted share unit (RSU) award (transaction code M).
• 2,198.114 shares were simultaneously withheld by the company to satisfy tax obligations at an average price of $356.93 (transaction code F).
• Post-transaction, Reese directly owns 1,776.886 shares and retains 7,950 unvested RSUs that will vest in equal thirds through 07/01/2027.

No open-market purchases or discretionary sales occurred; the filing represents a routine administrative conversion under the Aon plc 2011 Incentive Compensation Plan. Because the net share change is modest and entirely compensation-driven, the event is viewed as neutral from a market-impact perspective and does not alter Aon’s financial outlook or capital structure.

Positive

• 3,975 shares added to CFO’s holdings align management incentives with shareholders.

Negative

• 2,198 shares were withheld/disposed to cover taxes, reducing the net increase in ownership.

Insights

Portfolio Manager

TL;DR – Routine RSU vesting; CFO nets 1,777 shares, no open-market action, neutral signal for AON insider sentiment.

The filing shows standard executive compensation mechanics rather than an elective transaction. Reese converted 3,975 RSUs, surrendered 2,198 shares for taxes, and increased his direct ownership to roughly 1.8k shares while holding 7,950 RSUs that continue to vest. There is no evidence of either confidence-driven buying or concern-driven selling. Given Aon’s ~200 m share count, the net share movement is immaterial <0.001%. I view the disclosure as not impactful for valuation models or trading strategy.

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

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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 IL 60601

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2025

4. 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 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	07/01/2025		M(1)		3,975	A	(1)	3,975	D
Class A Ordinary Stock	07/01/2025		F(2)		2,198.114	D	$356.93	1,776.886	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)	07/01/2025		M			3,975	(4)	07/01/2027(4)	Class A Ordinary Shares	3,975	$0	7,950	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	07/03/2025
	** Signature of Reporting Person	Date
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FAQ

What insider transaction did AON’s CFO Edmund Reese report on 07/01/2025?

He converted 3,975 RSUs into Class A shares, a routine vesting event under Aon’s incentive plan.

How many AON shares were disposed of in the filing?

2,198.114 shares were withheld by the issuer to pay payroll taxes.

How many AON shares and RSUs does the CFO now hold?

Post-transaction he owns 1,776.886 shares directly and 7,950 unvested RSUs.

Why is the Form 4 considered neutral for investors?

The activity is an automatic RSU settlement with no open-market buying or selling, so it carries minimal signal value.

When will the remaining RSUs awarded to Edmund Reese fully vest?

They vest in three equal annual tranches, concluding on 07/01/2027.