Aon plc (NYSE: AON) counsel sells 1,900 shares under 10b5-1 plan

Rhea-AI Filing Summary

Aon plc reported that General Counsel Darren Zeidel sold a total of 1,900 shares of Class A Ordinary Stock on 2026-07-28 in three transactions classified as sales in open market or private transactions, at prices of $376.0000, $378.0000, and $380.0000 per share. These sales were effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 5, 2025.

Insider Trade Summary 10b5-1

Net Seller: 1,900 shares

Net Sell 3 txns

Insider Zeidel Darren

Role General Counsel

Sold 1,900 shs ($718K)

Type	Security	Shares	Price	Value
Sale	Class A Ordinary Stock F1	700	$376.00	$263K
Sale	Class A Ordinary Stock F1	725	$378.00	$274K
Sale	Class A Ordinary Stock F1	475	$380.00	$181K

Holdings After Transaction: Class A Ordinary Stock — 11,504.099 shares (Direct)

Footnotes (1)

1. F1. The transaction reported was effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 5, 2025.

Key Figures

Shares sold: 1,900 shares First sale price: $376.0000 per share Second sale price: $378.0000 per share +2 more

5 metrics

Shares sold 1,900 shares Aggregate Class A Ordinary Stock sold on 2026-07-28

First sale price $376.0000 per share Sale of 700 Class A shares on 2026-07-28

Second sale price $378.0000 per share Sale of 725 Class A shares on 2026-07-28

Third sale price $380.0000 per share Sale of 475 Class A shares on 2026-07-28

Rule 10b5-1 plan date November 5, 2025 Date trading plan meeting SEC Rule 10b5-1 was entered into

Key Terms

SEC Rule 10b5-1, Class A Ordinary Stock, open market or private transaction

3 terms

SEC Rule 10b5-1 regulatory

"trading plan meeting the requirements of SEC Rule 10b5-1"

A SEC Rule 10b5-1 trading plan lets company insiders set up a written, prearranged schedule for buying or selling shares so those trades are not treated as illegal insider trading later, provided the plan was adopted when they did not possess important, nonpublic information and they follow it exactly. For investors this matters because such plans can make insider activity more predictable and reduce the appearance that trades were made on secret knowledge—think of it like programming an automatic thermostat so temperature changes aren’t blamed on someone’s private decisions—though changes to or disclosures about plans can still affect confidence.

Class A Ordinary Stock financial

"security_title: Class A Ordinary Stock"

open market or private transaction financial

"Sale in open market or private transaction"

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/30/2026 - 05:24 PM Accepted by SEC EDGAR 07/30/2026 - 05:23 PM Learn about SEC filing dates

FAQ

What insider transaction did Aon (AON) report for Darren Zeidel?

Aon reported that General Counsel Darren Zeidel sold 1,900 Class A Ordinary shares on 2026-07-28 in three transactions at prices between $376.0000 and $380.0000 per share, under a trading plan meeting SEC Rule 10b5-1 requirements.

How many Aon (AON) shares did Darren Zeidel sell and at what prices?

Darren Zeidel sold a total of 1,900 Aon Class A shares. The sales occurred in three tranches: 700 shares at $376.0000, 725 shares at $378.0000, and 475 shares at $380.0000 per share, all on 2026-07-28.

Was the Aon (AON) insider sale made under a Rule 10b5-1 trading plan?

Yes. The filing states the transactions were effected under a trading plan meeting SEC Rule 10b5-1, which was entered into on November 5, 2025. All three reported sales on 2026-07-28 reference this plan in a shared footnote.

What is Darren Zeidel’s role at Aon (AON) in this Form 4 filing?

In this Form 4, Darren Zeidel is identified as an officer of Aon plc with the title General Counsel. The reported transactions involve his direct ownership of Aon Class A Ordinary Stock, as indicated by the ownership code "D" in the filing.

What types of transactions were reported in Aon’s (AON) latest Form 4?

The Form 4 reports three sale transactions in Aon Class A Ordinary Stock, each coded "S" for sale in an open market or private transaction. No derivative securities, option exercises, or gifts were reported; all transactions involve non-derivative common equity.

How many Aon (AON) shares were sold in each individual transaction?

On 2026-07-28, Darren Zeidel sold 700 Aon Class A shares at $376.0000, 725 shares at $378.0000, and 475 shares at $380.0000. Together, these three transactions total 1,900 shares sold under the same Rule 10b5-1 plan.

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).

X

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^*

Zeidel Darren

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/28/2026

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	07/28/2026		S		700	D	$376(1)	12,704.099	D
Class A Ordinary Stock	07/28/2026		S		725	D	$378(1)	11,979.099	D
Class A Ordinary Stock	07/28/2026		S		475	D	$380(1)	11,504.099	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

Explanation of Responses:

1. The transaction reported was effected pursuant to a trading plan meeting the requirements of SEC Rule 10b5-1 entered into on November 5, 2025.

	/s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Darren Zeidel	07/30/2026
	** 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)