Gregory C. Case - Feb 11, 2022 Form 4 Insider Report for Aon plc (AON)

Role: Chief Executive Officer, Director
Signature: /s/ Julie Cho - Julie Cho pursuant to a power of attorney from Greg Case
Stock symbol: AON
Transactions as of: Feb 11, 2022
Transactions value $: -$210,014
Form type: 4
Date filed: 2/15/2022, 06:50 PM
Next filing: Feb 17, 2022

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AON	Class A Ordinary Stock	Options Exercise		+1.77K	+0.29%		612K	Feb 11, 2022	Direct	F1, F2
transaction	AON	Class A Ordinary Stock	Tax liability	-$210K	-741	-0.12%	$283.42	611K	Feb 11, 2022	Direct	F3
holding	AON	Class A Ordinary Stock						283K	Feb 11, 2022	By GRAT	F2
holding	AON	Class A Ordinary Stock						122K	Feb 11, 2022	By Trust
holding	AON	Class A Ordinary Stock						122K	Feb 11, 2022	By Trust
holding	AON	Class A Ordinary Stock						74.8K	Feb 11, 2022	By Trust
holding	AON	Class A Ordinary Stock						74.8K	Feb 11, 2022	By Trust

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	$0	-1.77K	-33.33%	$0.00	3.53K	Feb 11, 2022	Class A Ordinary Shares	1.77K		Direct	F4, 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	On November 8, 2021, the GRAT returned 117,322 shares to the reporting person as an annuity payment.
F3	Class A Ordinary Shares withheld by the issuer for payment of withholding taxes in connection with the vesting of the 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 US$0.01 per share issued to the reporting person.
F5	A restricted share unit award was granted on February 12, 2021 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 33 1/3% of the award vests on each of the first through third anniversary of the date of grant.