Lester B. Knight - 02 Sep 2026 Form 4 Insider Report for Aon plc (AON)

Reporting relationship: Director
Issuer ticker: AON
Reported as of: 02 Sep 2026
Net transaction value: +$6,549,688
SEC form: 4
Accepted by SEC: 03 Sep 2026, 20:33:17 UTC
Prior SEC filing: 29 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Lester Knight

Key filing fact

Lester B. Knight filed Form 4 for Aon plc (AON) on 03 Sep 2026.

Key facts

This page summarizes Lester B. Knight's Form 4 filing for Aon plc (AON).
6 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 03 Sep 2026, 20:33.

Change

Previous filing in this sequence was filed on 29 Jun 2026.
Current net transaction value: +$6,549,688.

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 0001023262 Primary reporting owner

KNIGHT LESTER B

Relationship: Director
Address: 200 EAST RANDOLPH ST., CHICAGO
Signature: /s/ Colby Alexis - Colby Alexis pursuant to a power of attorney from Lester Knight
Signature date: 03 Sep 2026

Reported non-derivative transactions

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

AON transaction

Class A Ordinary Stock

Purchase

Transaction value: $566,271
Shares: +1,739
Change %: +1.2%
Price: $325.63
Shares after: 144,739
Date: 02 Sep 2026
Ownership: By Family Partnership
Footnotes: F1

AON transaction

Class A Ordinary Stock

Purchase

Transaction value: $1,664,323
Shares: +5,097
Change %: +3.5%
Price: $326.53
Shares after: 149,836
Date: 02 Sep 2026
Ownership: By Family Partnership
Footnotes: F2

AON transaction

Class A Ordinary Stock

Purchase

Transaction value: $2,362,074
Shares: +7,212
Change %: +4.8%
Price: $327.52
Shares after: 157,048
Date: 02 Sep 2026
Ownership: By Family Partnership
Footnotes: F3

AON transaction

Class A Ordinary Stock

Purchase

Transaction value: $1,360,969
Shares: +4,145
Change %: +2.6%
Price: $328.34
Shares after: 161,193
Date: 02 Sep 2026
Ownership: By Family Partnership
Footnotes: F4

AON transaction

Class A Ordinary Stock

Purchase

Transaction value: $474,754
Shares: +1,440
Change %: +0.89%
Price: $329.69
Shares after: 162,633
Date: 02 Sep 2026
Ownership: By Family Partnership
Footnotes: F5

AON transaction

Class A Ordinary Stock

Purchase

Transaction value: $121,297
Shares: +367
Change %: +0.23%
Price: $330.51
Shares after: 163,000
Date: 02 Sep 2026
Ownership: By Family Partnership
Footnotes: F6

AON holding

Class A Ordinary Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,227
Date: 02 Sep 2026
Ownership: Direct

AON holding

Class A Ordinary Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 124,604
Date: 02 Sep 2026
Ownership: By Wife

AON holding

Class A Ordinary Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 26,033
Date: 02 Sep 2026
Ownership: Personal Revocable Trust

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

The price reported is a weighted average price. Shares were purchased in a series of transactions within the same trading day at prices ranging from $325.03 to $326.02, inclusive. Full information regarding the number of shares purchased at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.

Footnote F2

The price reported is a weighted average price. Shares were purchased in a series of transactions within the same trading day at prices ranging from $326.03 to $327.02, inclusive. Full information regarding the number of shares purchased at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.

Footnote F3

The price reported is a weighted average price. Shares were purchased in a series of transactions within the same trading day at prices ranging from $327.04 to $328.03, inclusive. Full information regarding the number of shares purchased at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.

Footnote F4

The price reported is a weighted average price. Shares were purchased in a series of transactions within the same trading day at prices ranging from $328.04 to $329.03, inclusive. Full information regarding the number of shares purchased at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.

Footnote F5

The price reported is a weighted average price. Shares were purchased in a series of transactions within the same trading day at prices ranging from $329.08 to $330.07, inclusive. Full information regarding the number of shares purchased at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.

Footnote F6

The price reported is a weighted average price. Shares were purchased in a series of transactions within the same trading day at prices ranging from $330.09 to $330.88, inclusive. Full information regarding the number of shares purchased at each separate price is available upon request by the Commission staff, the issuer, or a security holder of the issuer.