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Investment Visual

AON

Aon plc

$338.31+4.89 (+1.47%)Close Nov 13, 2026

Backtest AON

Insider trading

12 months to Sep 3, 2026
Net bought
$75.8K
Buys less sales
Bought
$7.83M
Lester B. Knight
Sold
$7.75M
1 insider · $3.30M in plan sales
Latest buy
Sep 2, 2026
Lester B. Knight

Buys and sales on the price

Since 2003

By period

Open-market trades
Trades3 months12 monthsSince 2003
Buys1233
Sales36371
Plan sales34243
Shares bought20,00020.0K24,00024.0K550,249550K
Shares sold4,4504.45K22,59022.6K11,752,23011.8M
Net shares+15,550+15.6K+1,410+1.41K−11,201,981−11.2M
Net value+$4.89M+$75.8K−$670M

Insiders

InsiderShares held
Richard C. Notebaert
Director
—
28,328 Class A
Gloria Santona
Director
—
40,198 Class A
Lester B. Knight
Director
—
318,864 Class A
Gregory C. Case
President & CEO, Director
—
1,108,878 Class A
as of Feb 20, 2026
Cheryl A. Francis
Director
—
29,294 Class A

Trades

404 trades since 2003
TypeInsiderRoleSharesPriceHeld after
Sep 2, 2026Buy
Class A
Lester B. KnightDirector
Director
Director
20,000
at $327.48
$327.48$6.55M
+6.7%
Changed by trades not shown: 319K after
Changed by trades not shown: 318,864
Jul 28, 2026Plan sale
Class A
Darren ZeidelGeneral Counsel
General Counsel
General Counsel
1,900
at $377.76
$377.76$718K
−14.2%
11.5K after
11,504
Jul 17, 2026Plan sale
Class A
Darren ZeidelGeneral Counsel
General Counsel
General Counsel
1,950
at $372.05
$372.05$726K
−12.7%
13.4K after
13,404
Jul 7, 2026Plan sale
Class A
Darren ZeidelGeneral Counsel
General Counsel
General Counsel
600
at $360.00
$360.00$216K
−3.8%
15.4K after
15,354
Feb 26, 2026Sale
Class A
Darren ZeidelGeneral Counsel
General Counsel
General Counsel
4,300
at $329.72
$329.72$1.42M
−21.2%
16.0K after
15,954
Feb 17, 2026Plan sale
Class A
Darren ZeidelGeneral Counsel
General Counsel
General Counsel
5,040
at $325.79
$325.79$1.64M
−19.9%
Changed by trades not shown: 20.3K after
Changed by trades not shown: 20,254
Feb 10, 2026Buy
Class A
Lester B. KnightDirector
Director
Director
4,000
at $319.24
$319.24$1.28M
+1.4%
297K after
297,376
Nov 5, 2025Sale
Class A
Darren ZeidelGeneral Counsel
General Counsel
General Counsel
8,800
at $344.52
$344.52$3.03M
−30.3%
20.3K after
20,253
Nov 27, 2024Sale
Class A
Mindy F. SimonChief Operating Officer
Chief Operating Officer
Chief Operating Officer
650
at $394.34
$394.34$256K
−26.4%
1.82K after
1,816
Nov 26, 2024Sale
Class A
Lisa StevensChief Administrative Officer
Chief Administrative Officer
Chief Administrative Officer
1,275
at $387.68
$387.68$494K
−13.6%
8.08K after
8,077
  • Lester B. Knight$6.55M
    Sep 2, 2026 · Buy20,000 Class A at $327.48
    Director+6.7% of holdings, Changed by trades not shown: 319K after
  • Darren Zeidel$718K
    Jul 28, 2026 · Plan sale1,900 Class A at $377.76
    General Counsel−14.2% of holdings, 11.5K after
  • Darren Zeidel$726K
    Jul 17, 2026 · Plan sale1,950 Class A at $372.05
    General Counsel−12.7% of holdings, 13.4K after
  • Darren Zeidel$216K
    Jul 7, 2026 · Plan sale600 Class A at $360.00
    General Counsel−3.8% of holdings, 15.4K after
  • Darren Zeidel$1.42M
    Feb 26, 2026 · Sale4,300 Class A at $329.72
    General Counsel−21.2% of holdings, 16.0K after
  • Darren Zeidel$1.64M
    Feb 17, 2026 · Plan sale5,040 Class A at $325.79
    General Counsel−19.9% of holdings, Changed by trades not shown: 20.3K after
  • Lester B. Knight$1.28M
    Feb 10, 2026 · Buy4,000 Class A at $319.24
    Director+1.4% of holdings, 297K after
  • Darren Zeidel$3.03M
    Nov 5, 2025 · Sale8,800 Class A at $344.52
    General Counsel−30.3% of holdings, 20.3K after
  • Mindy F. Simon$256K
    Nov 27, 2024 · Sale650 Class A at $394.34
    Chief Operating Officer−26.4% of holdings, 1.82K after
  • Lisa Stevens$494K
    Nov 26, 2024 · Sale1,275 Class A at $387.68
    Chief Administrative Officer−13.6% of holdings, 8.08K after