Anne Corona - 13 Mar 2026 Form 4 Insider Report for Aon plc (AON)

Role: Chief Commercial Officer
Signature: /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Anne Corona
Issuer symbol: AON
Transactions as of: 13 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 17 Mar 2026, 16:14:48 UTC
Previous filing: 17 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Corona Anne	Chief Commercial Officer	200 EAST RANDOLPH STREET, CHICAGO	/s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Anne Corona	17 Mar 2026	0002062793

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AON	Class A Ordinary Stock	Options Exercise		+193	+4.8%		4,183	13 Mar 2026	Direct	F1
transaction	AON	Class A Ordinary Stock	Tax liability		-85	-2%	$321.41^*	4,098	13 Mar 2026	Direct	F2
transaction	AON	Class A Ordinary Stock	Options Exercise		+174	+4.2%		4,272	13 Mar 2026	Direct	F1
transaction	AON	Class A Ordinary Stock	Tax liability		-77	-1.8%	$321.41^*	4,195	13 Mar 2026	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AON	Restricted Share Unit (Right to Receive)	Options Exercise		-193	-100%	$0.000000^*	0	13 Mar 2026	Class A Ordinary Shares	193		Direct	F3, F4
transaction	AON	Restricted Share Unit (Right to Receive)	Options Exercise		-174	-33%	$0.000000^*	348	13 Mar 2026	Class A Ordinary Shares	174		Direct	F3, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.
F2	Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.
F3	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.
F4	A restricted share unit award was granted on March 15, 2023 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.
F5	A restricted share unit award was granted on March 14, 2025 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.