Andy Marcell - 13 Mar 2026 Form 4 Insider Report for Aon plc (AON)

Role
Global CEO, Solution Lines
Signature
/s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Andy Marcell
Issuer symbol
AON
Transactions as of
13 Mar 2026
Net transactions value
$0
Form type
4
Filing time
17 Mar 2026, 16:08:33 UTC
Previous filing
17 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Marcell Andy Global CEO, Solution Lines 200 EAST RANDOLPH STREET, CHICAGO /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Andy Marcell 17 Mar 2026 0002076043

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AON Class A Ordinary Stock Options Exercise +1,166 +15% 9,149 13 Mar 2026 Direct F1
transaction AON Class A Ordinary Stock Tax liability -568 -6.2% $321.41* 8,582 13 Mar 2026 Direct F2
transaction AON Class A Ordinary Stock Options Exercise +464 +5.4% 9,046 13 Mar 2026 Direct F1
transaction AON Class A Ordinary Stock Tax liability -226 -2.5% $321.41* 8,820 13 Mar 2026 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 Restricted Share Unit (Right to Receive) Options Exercise -1,166 -100% $0.000000* 0 13 Mar 2026 Class A Ordinary Shares 1,166 Direct F3, F4
transaction AON Restricted Share Unit (Right to Receive) Options Exercise -464 -33% $0.000000* 928 13 Mar 2026 Class A Ordinary Shares 464 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 payment of taxes in connection with the vesting of the award.
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 $0.01 per share issued to the reporting person.
F4 A restricted share unit award was granted on March 23, 2023 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan, as amended and restated: 33 1/3% of the award vests on each of the first through third anniversary of the date of grant.
F5 A restricted share unit award was granted on March 14, 2025 and vests in accordance with the terms of the Aon plc 2011 Incentive Compensation Plan, as amended and restated: 33 1/3% of the award vests on each of the first through third anniversary of the date of grant.