Darren Zeidel - 12 Feb 2026 Form 4 Insider Report for Aon plc (AON)

Role: General Counsel
Signature: /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Darren Zeidel
Issuer symbol: AON
Transactions as of: 12 Feb 2026
Net transactions value: -$1,001,660
Form type: 4
Filing time: 17 Feb 2026, 17:22:44 UTC
Previous filing: 07 Nov 2025
Next filing: 19 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Zeidel Darren	General Counsel	200 EAST RANDOLPH ST., CHICAGO	/s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Darren Zeidel	17 Feb 2026	0001782945

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AON	Class A Ordinary Stock	Award		+7,135	+35%		27,388	12 Feb 2026	Direct	F1
transaction	AON	Class A Ordinary Stock	Tax liability	$847,751	-2,696	-9.8%	$314.49	24,693	12 Feb 2026	Direct	F2
transaction	AON	Class A Ordinary Stock	Options Exercise		+871	+3.5%		25,564	13 Feb 2026	Direct	F3
transaction	AON	Class A Ordinary Stock	Tax liability	$124,125	-386	-1.5%	$321.70	25,178	13 Feb 2026	Direct	F2
transaction	AON	Class A Ordinary Stock	Options Exercise		+209	+0.83%		25,387	13 Feb 2026	Direct	F3
transaction	AON	Class A Ordinary Stock	Tax liability	$29,785	-93	-0.36%	$321.70	25,294	13 Feb 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)	Award	$0	+1,113		$0.000000	1,113	12 Feb 2026	Class A Ordinary Shares	1,113		Direct	F4, F5
transaction	AON	Restricted Share Unit (Right to Receive)	Options Exercise	$0	-871	-100%	$0.000000	0	13 Feb 2026	Class A Ordinary Shares	871		Direct	F4, F6
transaction	AON	Restricted Share Unit (Right to Receive)	Options Exercise	$0	-209	-33%	$0.000000	419	13 Feb 2026	Class A Ordinary Shares	209		Direct	F4, F7

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

Explanation of Responses:

Id	Content
F1	Represents Class A Ordinary Shares issued upon the settlement of performance share unit awards originally granted approximately three years ago under the eighteenth cycle of the Company's Leadership Performance Program. The number of shares issued was determined by the Organization and Compensation Committee of the Board of Directors on February 12, 2026, based on the Company's performance for the period from January 1, 2023 to December 31, 2025.
F2	Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.
F3	Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.
F4	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.
F5	The restricted share unit award vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan, as amended and restated, as follows: 33 1/3% of the award vests on each of the first through third anniversary of the date of the grant.
F6	A restricted share unit award was granted on February 16, 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.
F7	A restricted share unit award was granted on February 13, 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.