Key facts
- This page summarizes Gregory C. Case's Form 4 filing for Aon plc (AON).
- 7 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 19 Feb 2026, 17:01.
Gregory C. Case - 17 Feb 2026 Form 4 Insider Report for Aon plc (AON)
- Reporting relationship
- President & CEO, Director
- Issuer ticker
- AON
- Reported as of
- 17 Feb 2026
- Net transaction value
- -$326,513
- SEC form
- 4
- Accepted by SEC
- 19 Feb 2026, 17:01:04 UTC
- Prior SEC filing
- 17 Feb 2026
- Next SEC filing
- 20 Feb 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Greg Case
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Gregory C. Case filed Form 4 for Aon plc (AON) on 19 Feb 2026.
Change
- Previous filing in this sequence was filed on 17 Feb 2026.
- Current net transaction value: -$326,513.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001322803
Primary reporting owner
Case Gregory C
- Relationship
- President & CEO, Director
- Address
- 200 EAST RANDOLPH ST., CHICAGO
- Signature
- /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Greg Case
- Signature date
- 19 Feb 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
- +2,357
- Change %
- +0.25%
- Price
- Shares after
- 941,139
- Date
- 17 Feb 2026
- Ownership
- Direct
- Footnotes
- F1
AON
transaction
Class A Ordinary Stock
Tax liability
- Transaction value
- $326,513
- Shares
- -1,002
- Change %
- -0.11%
- Price
- $325.96
- Shares after
- 940,137
- Date
- 17 Feb 2026
- Ownership
- Direct
- Footnotes
- F2
AON
transaction
Class A Ordinary Stock
Gift
- Transaction value
- $0
- Shares
- -3,214
- Change %
- -0.34%
- Price
- $0.000000
- Shares after
- 936,923
- Date
- 17 Feb 2026
- Ownership
- Direct
AON
transaction
Class A Ordinary Stock
Gift
- Transaction value
- $0
- Shares
- -3,214
- Change %
- -0.34%
- Price
- $0.000000
- Shares after
- 933,709
- Date
- 17 Feb 2026
- Ownership
- Direct
AON
transaction
Class A Ordinary Stock
Gift
- Transaction value
- $0
- Shares
- +3,214
- Change %
- +2.5%
- Price
- $0.000000
- Shares after
- 132,243
- Date
- 17 Feb 2026
- Ownership
- By Trust
AON
transaction
Class A Ordinary Stock
Gift
- Transaction value
- $0
- Shares
- +3,214
- Change %
- +2.5%
- Price
- $0.000000
- Shares after
- 132,243
- Date
- 17 Feb 2026
- Ownership
- By Trust
AON
holding
Class A Ordinary Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 163,964
- Date
- 17 Feb 2026
- Ownership
- By Trust
AON
holding
Class A Ordinary Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 163,963
- Date
- 17 Feb 2026
- Ownership
- By Trust
AON
holding
Class A Ordinary Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 37,412
- Date
- 17 Feb 2026
- Ownership
- By GRAT
AON
holding
Class A Ordinary Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 73,240
- Date
- 17 Feb 2026
- Ownership
- By GRAT
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
- $0
- Shares
- -2,357
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 17 Feb 2026
- Ownership
- Direct
- Underlying class
- Class A Ordinary Shares
- Underlying amount
- 2,357
- Exercise price
- Footnotes
- F3, F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 4 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 withholding 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 February 17, 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.