Lisa Stevens - 13 Feb 2025 Form 4 Insider Report for Aon plc (AON)

Role: Chief Administrative Officer
Signature: /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Lisa Stevens
Issuer symbol: AON
Transactions as of: 13 Feb 2025
Net transactions value: -$3,284,219
Form type: 4
Filing time: 18 Feb 2025, 19:17:31 UTC
Previous filing: 29 Nov 2024
Next filing: 24 Feb 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AON	Class A Ordinary Stock	Award		+15,418	+190%		23,523	13 Feb 2025	Direct	F1, F2
transaction	AON	Class A Ordinary Stock	Tax liability	$2,902,174	-7,436	-32%	$390.29	16,087	13 Feb 2025	Direct	F3
transaction	AON	Class A Ordinary Stock	Options Exercise		+498	+3.1%		16,585	14 Feb 2025	Direct	F4
transaction	AON	Class A Ordinary Stock	Tax liability	$97,669	-252	-1.5%	$386.99	16,333	14 Feb 2025	Direct	F3
transaction	AON	Class A Ordinary Stock	Options Exercise		+1,450	+8.9%		17,783	14 Feb 2025	Direct	F4
transaction	AON	Class A Ordinary Stock	Tax liability	$284,377	-735	-4.1%	$386.99	17,048	14 Feb 2025	Direct	F3

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	+1,435		$0.000000	1,435	13 Feb 2025	Class A Ordinary Shares	1,435		Direct	F5, F6
transaction	AON	Restricted Share Unit (Right to Receive)	Options Exercise	$0	-498	-100%	$0.000000	0	14 Feb 2025	Class A Ordinary Shares	498		Direct	F5, F7
transaction	AON	Restricted Share Unit (Right to Receive)	Options Exercise	$0	-1,450	-50%	$0.000000	1,451	14 Feb 2025	Class A Ordinary Shares	1,450		Direct	F5, F8

* 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 seventeenth 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 13, 2025, based on the Company's performance for the period from January 1, 2022 to December 31, 2024.
F2	Includes shares acquired under the Aon employee stock purchase plan on December 31, 2024.
F3	Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.
F4	Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.
F5	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.
F6	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.
F7	A restricted share unit award was granted on February 17, 2022 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.
F8	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.