Darren Zeidel - May 21, 2021 Form 4 Insider Report for Aon plc (AON)

Role: General Counsel
Signature: /s/ Julie Cho- Julie Cho with a power of attorney from Darren Zeidel
Stock symbol: AON
Transactions as of: May 21, 2021
Transactions value $: -$5,064
Form type: 4
Date filed: 5/25/2021, 07:20 PM
Previous filing: May 21, 2021
Next filing: Nov 23, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AON	Class A Ordinary Stock	Options Exercise		+45	+0.36%		12.5K	May 21, 2021	Direct	F1
transaction	AON	Class A Ordinary Stock	Tax liability	-$5.06K	-20	-0.16%	$253.21	12.4K	May 21, 2021	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	Restrictive Share Unit (Right to Receive)	Options Exercise	$0	-45	-25.42%	$0.00	132	May 21, 2021	Class A Ordinary Shares	45		Direct	F3, F4

* 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 the payment of withholding taxes in connection with the vesting of a restricted shares unit.
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 US$0.01 per share issued to the reporting person;
F4	A restricted share unit award was granted on May 21, 2019 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan: 20% of the award vests on each of the first through fifth anniversary of the date of grant.