Offerings - Offering: 1

Jul. 25, 2025

USD ($)

shares

Offering:

Fee Previously Paid

false

Other Rule

true

Security Type

Equity

Security Class Title

Class A Ordinary Shares, par value $0.01 per share

Amount Registered | shares

3,800,000

Proposed Maximum Offering Price per Unit

353.68

Maximum Aggregate Offering Price

$ 1,343,984,000

Fee Rate

0.01531%

Amount of Registration Fee

$ 205,763.96

Offering Note

(1) Pursuant to Rule 416(a) under the Securities Act of 1933, as amended (the “Securities Act”), this registration statement on Form S-8 shall also cover any additional shares of the Class A Ordinary Shares of Aon plc (the “Registrant”) that become issuable in respect of the securities identified in the above table by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without the Registrant’s receipt of consideration that results in an increase in the number of the outstanding shares of the Registrant’s Class A Ordinary Shares.

(2) Represents additional shares of the Registrant’s Class A Ordinary Shares reserved and available for issuance under the Aon plc 2011 Incentive Plan, as amended and restated.

(3) Estimated in accordance with Rules 457(c) and (h) of the Securities Act, solely for the purpose of calculating the registration fee. The proposed maximum offering price per share of $353.68 was computed by averaging the high ($356.61) and low ($350.75) prices of a share of the Registrant’s Class A Ordinary Shares as reported on The New York Stock Exchange on July 21, 2025.