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

Reporting relationship: Global CEO, Solution Lines
Issuer ticker: AON
Reported as of: 13 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Mar 2026, 16:08:33 UTC
Prior SEC filing: 17 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Andy Marcell

Key filing fact

Andy Marcell filed Form 4 for Aon plc (AON) on 17 Mar 2026.

Key facts

This page summarizes Andy Marcell's Form 4 filing for Aon plc (AON).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 17 Mar 2026, 16:08.

Change

Previous filing in this sequence was filed on 17 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002076043 Primary reporting owner

Marcell Andy

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AON transaction

Class A Ordinary Stock

Options Exercise

Transaction value
Shares: +1,166
Change %: +15%
Price
Shares after: 9,149
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F1

AON transaction

Class A Ordinary Stock

Tax liability

Transaction value
Shares: -568
Change %: -6.2%
Price: $321.41^*
Shares after: 8,582
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F2

AON transaction

Class A Ordinary Stock

Options Exercise

Transaction value
Shares: +464
Change %: +5.4%
Price
Shares after: 9,046
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F1

AON transaction

Class A Ordinary Stock

Tax liability

Transaction value
Shares: -226
Change %: -2.5%
Price: $321.41^*
Shares after: 8,820
Date: 13 Mar 2026
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

AON transaction Derivative

Restricted Share Unit (Right to Receive)

Options Exercise

Transaction value
Shares: -1,166
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Class A Ordinary Shares
Underlying amount: 1,166
Exercise price
Footnotes: F3, F4

AON transaction Derivative

Restricted Share Unit (Right to Receive)

Options Exercise

Transaction value
Shares: -464
Change %: -33%
Price: $0.000000^*
Shares after: 928
Date: 13 Mar 2026
Ownership: Direct
Underlying class: Class A Ordinary Shares
Underlying amount: 464
Exercise price
Footnotes: F3, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Class A Ordinary Shares acquired upon the vesting of a restricted share unit award.

Footnote F2

Class A Ordinary Shares withheld by the issuer for payment of taxes in connection with the vesting of the award.

Footnote 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.

Footnote 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.

Footnote 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.