Aon plc (NYSE: AON) counsel trades 1,950 shares under 10b5-1 plan

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

Aon (AON) reported that General Counsel Darren Zeidel sold 1,950 shares of Class A Ordinary Stock on July 17, 2026 . The sales occurred in three separate trades at prices between $370 and $374 per share under a pre-established trading plan.

Q: At what prices did Darren Zeidel sell Aon (AON) shares?

Darren Zeidel sold Aon (AON) Class A Ordinary Stock at $370 , $372 , and $374 per share. These three trades on July 17, 2026, totaled 1,950 shares and were executed pursuant to an SEC Rule 10b5-1 trading plan.

Q: How many Aon (AON) shares did Darren Zeidel sell in each trade?

On July 17, 2026, Darren Zeidel sold 625 shares at $370, 650 shares at $372, and 675 shares at $374 of Aon (AON) Class A Ordinary Stock. Altogether, these three transactions amounted to 1,950 shares sold.

Q: Were Darren Zeidel’s Aon (AON) stock sales under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were executed under a Rule 10b5-1 trading plan entered into on November 5, 2025 . Such plans allow pre-arranged trades according to specified terms, reducing the role of subsequent discretionary timing.

Q: What role does Darren Zeidel hold at Aon (AON)?

Darren Zeidel is reported as General Counsel of Aon (AON). The Form 4 shows he is an officer but not a director or 10% owner, and that the reported transactions involve direct ownership of Class A Ordinary Stock.

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Aon plc reported that General Counsel Darren Zeidel sold a total of 1,950 Class A Ordinary shares on July 17, 2026, in three transactions at prices from $370 to $374 per share. The sales were effected under a Rule 10b5-1 trading plan entered into on November 5, 2025.

Insights

Analyzing...

Insider Trade Summary 10b5-1

Net Seller: 1,950 shares

Net Sell 3 txns

Insider Zeidel Darren

Role General Counsel

Sold 1,950 shs ($726K)

Type	Security	Shares	Price	Value
Sale	Class A Ordinary Stock ^F1	625	$370.00	$231K
Sale	Class A Ordinary Stock ^F1	650	$372.00	$242K
Sale	Class A Ordinary Stock ^F1	675	$374.00	$252K

Holdings After Transaction: Class A Ordinary Stock — 13,404.099 shares (Direct)

Footnotes (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

Total shares sold: 1,950 shares Shares sold at $370: 625 shares Shares sold at $372: 650 shares +2 more

5 metrics

Total shares sold 1,950 shares Aggregate Class A Ordinary Stock sold by Darren Zeidel on July 17, 2026

Shares sold at $370 625 shares Class A Ordinary Stock sale at $370.0000 per share on July 17, 2026

Shares sold at $372 650 shares Class A Ordinary Stock sale at $372.0000 per share on July 17, 2026

Shares sold at $374 675 shares Class A Ordinary Stock sale at $374.0000 per share on July 17, 2026

Rule 10b5-1 plan adoption date November 5, 2025 Date Darren Zeidel entered into the trading plan under SEC Rule 10b5-1

Key Terms

Rule 10b5-1, Class A Ordinary Stock, trading plan

3 terms

Rule 10b5-1 regulatory

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

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

Class A Ordinary Stock financial

"security title listed as Class A Ordinary Stock"

trading plan regulatory

"transaction reported was effected pursuant to a trading plan"

A trading plan is a written set of rules an investor follows about what to buy or sell, when to enter and exit positions, and how much risk to accept—like a travel itinerary that maps the route, stops, and budget before a trip. It matters because it helps remove emotional decisions during market swings, enforces discipline, and makes performance easier to review and improve, reducing the chance of costly impulsive moves.

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 07/21/2026 - 04:14 PM Accepted by SEC EDGAR 07/21/2026 - 04:13 PM

FAQ

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

Aon (AON) reported that General Counsel Darren Zeidel sold 1,950 shares of Class A Ordinary Stock on July 17, 2026. The sales occurred in three separate trades at prices between $370 and $374 per share under a pre-established trading plan.

At what prices did Darren Zeidel sell Aon (AON) shares?

Darren Zeidel sold Aon (AON) Class A Ordinary Stock at $370, $372, and $374 per share. These three trades on July 17, 2026, totaled 1,950 shares and were executed pursuant to an SEC Rule 10b5-1 trading plan.

How many Aon (AON) shares did Darren Zeidel sell in each trade?

On July 17, 2026, Darren Zeidel sold 625 shares at $370, 650 shares at $372, and 675 shares at $374 of Aon (AON) Class A Ordinary Stock. Altogether, these three transactions amounted to 1,950 shares sold.

Were Darren Zeidel’s Aon (AON) stock sales under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were executed under a Rule 10b5-1 trading plan entered into on November 5, 2025. Such plans allow pre-arranged trades according to specified terms, reducing the role of subsequent discretionary timing.

What role does Darren Zeidel hold at Aon (AON)?

Darren Zeidel is reported as General Counsel of Aon (AON). The Form 4 shows he is an officer but not a director or 10% owner, and that the reported transactions involve direct ownership of Class A Ordinary Stock.

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^*

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)
07/17/2026

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	07/17/2026		S		625	D	$370⁽¹⁾	14,729.099	D
Class A Ordinary Stock	07/17/2026		S		650	D	$372⁽¹⁾	14,079.099	D
Class A Ordinary Stock	07/17/2026		S		675	D	$374⁽¹⁾	13,404.099	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)
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. 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	07/21/2026
	** 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