Form 8.3 -Aon plc

                                                FORM 8.3

IRISH TAKEOVER PANEL

DISCLOSURE UNDER RULE 8.3 OF THE IRISH TAKEOVER PANEL ACT, 1997, TAKEOVER RULES, 2013

DEALINGS BY PERSONS WITH INTERESTS IN RELEVANT SECURITIES REPRESENTING 1% OR MORE

1. KEY INFORMATION

Name of person dealing (Note 1)	State Street Global Advisors & Affiliates
Company dealt in	Aon plc
Class of relevant security to which the dealings being disclosed relate (Note 2)	US$0.01 ordinary shares
Date of dealing	17th  March 2021

2. INTERESTS AND SHORT POSITIONS

(a) Interests and short positions (following dealing) in the class of relevant security dealt in (Note 3)

	Long		Short
	Number	(%)	Number	(%)
(1) Relevant securities	9,247,977	4.09251%
(2) Derivatives (other than options)	N/A
(3) Options and agreements to purchase/sell	N/A
Total	9,247,977	4.09251%

(b) Interests and short positions in relevant securities of the company, other than the class dealt in (Note 3)

Class of relevant security:	Long		Short
	Number	(%)	Number	(%)
(1) Relevant securities	N/A
(2) Derivatives (other than options)	N/A
(3) Options and agreements to purchase/sell	N/A
Total	N/A

3. DEALINGS (Note 4)

(a) Purchases and sales

Purchase/sale	Number of relevant securities	Price per unit (Note 5)
Purchase	300	225.93
Purchase	10,125	225.79
Purchase	4,050	225.79
Purchase	9,045	225.79
Purchase	8,466	225.79
Purchase	2,958	225.79
Purchase	240	225.79
Purchase	40	225.79
Purchase	26	225.79
Purchase	208	225.79
Purchase	130	225.79
Purchase	169	225.79
Purchase	60	225.79
Purchase	128	225.79
Purchase	16	225.79
Purchase	400	225.79
Purchase	64	225.79
Purchase	400	225.79
Purchase	1,539	225.79
Purchase	105	225.79
Purchase	59	225.79
Purchase	1,792	225.79
Purchase	112	225.79
Purchase	150	225.79
Purchase	100	225.79
Sale	6,600	226.15
Sale	3,375	225.79
Sale	3,240	225.79
Sale	20	225.79
Sale	30	225.79
Transfer In	300	N/A

                                                                                                                                                                                    

 (b) Derivatives transactions (other than options transactions)

Product name, e.g. CFD	Nature of transaction (Note 6)	Number of relevant securities (Note 7)	Price per unit (Note 5)
N/A

                                                                                                                                                     
(c) Options transactions in respect of existing relevant securities

(i) Writing, selling, purchasing or varying

Product name, e.g. call option	Writing, selling, purchasing  varying etc.	Number of securities to which the option relates (Note 7)	Exercise price	Type, e.g. American, European etc.	Expiry date	Option money paid/received per unit (Note 5)
N/A

(ii) Exercising

Product name, e.g. call option	Number of securities	Exercise price per unit (Note 5)
N/A

(d) Other dealings (including transactions in respect of new securities) (Note 4)

Nature of transaction (Note 8)	Details	Price per unit (if applicable) (Note 5)
N/A

4. OTHER INFORMATION

Agreements, arrangements or understandings relating to options or derivatives

Full details of any agreement, arrangement or understanding between the person disclosing and any other person relating to the voting rights of any relevant securities under any option referred to on this form or relating to the voting rights or future acquisition or disposal of any relevant securities to which any derivative referred to on this form is referenced. If none, this should be stated.

N/A

Is a Supplemental Form 8 attached? (Note 9)	NO
Date of disclosure	18th  March 2021
Contact name	Lionel Colaco
Telephone number	020 33956098
If a connected EFM, name of offeree/offeror with which connected	N/A
If a connected EFM, state nature of connection (Note 10)	N/A