Darren Zeidel - 19 May 2021 Form 4 Insider Report for Aon plc (AON)

Role: General Counsel
Signature: /s/ Julie Cho- Julie Cho pursuant to a power of attorney from Darren Zeidel
Issuer symbol: AON
Transactions as of: 19 May 2021
Net transactions value: -$39,047
Form type: 4
Filing time: 21 May 2021, 16:08:02 UTC
Next filing: 25 May 2021
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	Options Exercise		+157	+1.3%		12,370	19 May 2021	Direct	F1
transaction	AON	Class A Ordinary Stock	Tax liability	$17,656	-70	-0.57%	$252.23	12,300	19 May 2021	Direct	F2
transaction	AON	Class A Ordinary Stock	Options Exercise		+189	+1.5%		12,489	20 May 2021	Direct	F1
transaction	AON	Class A Ordinary Stock	Tax liability	$21,391	-84	-0.67%	$254.65	12,405	20 May 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	-157	-50%	$0.000000	157	19 May 2021	Class A Ordinary Shares	157		Direct	F3, F4
transaction	AON	Restrictive Share Unit (Right to Receive)	Options Exercise	$0	-189	-100%	$0.000000^*	0	20 May 2021	Class A Ordinary Shares	189		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 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 19, 2017 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.
F5	A restricted share unit award was granted on May 20, 2016 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.