Aon plc (AON) Insider Trading

Last 12 months

Insiders bought $7.83M and sold $7.75M on the open market.

43% of the selling was scheduled in advance under 10b5-1 plans. General Counsel Darren Zeidel sold $3.03M on Nov 5, 2025, 30% of their stake, outside a plan.

Net open-market

+$76k

2 buys · 6 sales

Under a 10b5-1 plan

43%

of the value sold

Insiders who bought / sold

1 / 1

executives and directors

Last open-market buy

Sep 2026

Sep 2, 2026

Get an email when AON's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Sep 2	Lester B Knight Director	Bought 6 parts	20,000	$327.48 average	$6.55M	6.7%	Form 4
Jul 28	Darren Zeidel General Counsel	Sold10b5-1 plan 3 parts	1,900	$377.76 average	$718k	14%	Form 4
Jul 17	Darren Zeidel General Counsel	Sold10b5-1 plan 3 parts	1,950	$372.05 average	$726k	13%	Form 4
Jul 7	Darren Zeidel General Counsel	Sold10b5-1 plan	600	$360.00	$216k	3.8%	Form 4
Feb 26	Darren Zeidel General Counsel	SoldNo plan	4,300	$329.72	$1.42M	21%	Form 4
Feb 17	Darren Zeidel General Counsel	Sold10b5-1 plan	5,040	$325.79	$1.64M	20%	Form 4
Feb 10	Lester B Knight Director	Bought	4,000	$319.24	$1.28M	1.4%	Form 4
Nov 5, 2025	Darren Zeidel General Counsel	SoldNo plan 2 parts	8,800	$344.52 average	$3.03M	30%	Form 4
Nov 27, 2024	Mindy F. Simon Chief Operating Officer	SoldNo plan	650	$394.34	$256k	26%	Form 4
Nov 26, 2024	Lisa Stevens Chief Administrative Officer	SoldNo plan	1,275	$387.68	$494k	14%	Form 4

Sep 2
Lester B Knight
Director · bought 20,000 at avg $327.48
$6.55M
6.7% of stake
Jul 2810b5-1 plan
Darren Zeidel
General Counsel · sold 1,900 at avg $377.76
$718k
14% of stake
Jul 1710b5-1 plan
Darren Zeidel
General Counsel · sold 1,950 at avg $372.05
$726k
13% of stake
Jul 710b5-1 plan
Darren Zeidel
General Counsel · sold 600 at $360.00
$216k
3.8% of stake
Feb 26No plan
Darren Zeidel
General Counsel · sold 4,300 at $329.72
$1.42M
21% of stake
Feb 1710b5-1 plan
Darren Zeidel
General Counsel · sold 5,040 at $325.79
$1.64M
20% of stake
Feb 10
Lester B Knight
Director · bought 4,000 at $319.24
$1.28M
1.4% of stake
Nov 5, 2025No plan
Darren Zeidel
General Counsel · sold 8,800 at avg $344.52
$3.03M
30% of stake
Nov 27, 2024No plan
Mindy F. Simon
Chief Operating Officer · sold 650 at $394.34
$256k
26% of stake
Nov 26, 2024No plan
Lisa Stevens
Chief Administrative Officer · sold 1,275 at $387.68
$494k
14% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch AON, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in AON's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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