Aon plc (AON) · Insider trading

What Aon's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.

Bought, 12 months

$7.83M

1 insider, 7 trades

Sold, 12 months

$7.75M

1 insider, 43% under a plan

Net, 12 months

+$75,802

bought less sold

Latest filing

2026-09-03

filings read to 2026-10-19

Bought and sold at the market, by month

Two years. Purchases above the line, sales below, in dollars.

Bought Sold Largest month: $6.55M

Who traded, two years

Insider	Bought	Sold	Trades	Last trade	Holds after
Knight Lester BDirector	$7.83M	–	7	2026-09-02	–
Zeidel DarrenGeneral Counsel	–	$7.75M	11	2026-07-28	12,704
Stevens LisaChief Administrative Officer	–	$494,292	1	2024-11-26	8,077
Simon Mindy F.Chief Operating Officer	–	$256,321	1	2024-11-27	1,816

Open-market purchases and sales

Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.

Date	Insider	Trade	Shares	Price	Value	Holds after	Filing
2026-09-02	Knight Lester BDirector	Buyindirect	1,739	325.63	$566,271	144,739	Form 4
2026-09-02	Knight Lester BDirector	Buyindirect	5,097	326.53	$1.66M	149,836	Form 4
2026-09-02	Knight Lester BDirector	Buyindirect	7,212	327.52	$2.36M	157,048	Form 4
2026-09-02	Knight Lester BDirector	Buyindirect	4,145	328.34	$1.36M	161,193	Form 4
2026-09-02	Knight Lester BDirector	Buyindirect	1,440	329.69	$474,754	162,633	Form 4
2026-09-02	Knight Lester BDirector	Buyindirect	367	330.51	$121,297	163,000	Form 4
2026-07-28	Zeidel DarrenGeneral Counsel	Saleplan	700	376.00	$263,200	12,704	Form 4
2026-07-28	Zeidel DarrenGeneral Counsel	Saleplan	725	378.00	$274,050	11,979	Form 4
2026-07-28	Zeidel DarrenGeneral Counsel	Saleplan	475	380.00	$180,500	11,504	Form 4
2026-07-17	Zeidel DarrenGeneral Counsel	Saleplan	625	370.00	$231,250	14,729	Form 4
2026-07-17	Zeidel DarrenGeneral Counsel	Saleplan	650	372.00	$241,800	14,079	Form 4
2026-07-17	Zeidel DarrenGeneral Counsel	Saleplan	675	374.00	$252,450	13,404	Form 4
2026-07-07	Zeidel DarrenGeneral Counsel	Saleplan	600	360.00	$216,000	15,354	Form 4
2026-02-26	Zeidel DarrenGeneral Counsel	Sale	4,300	329.72	$1.42M	15,954	Form 4
2026-02-17	Zeidel DarrenGeneral Counsel	Saleplan	5,040	325.79	$1.64M	20,254	Form 4
2026-02-10	Knight Lester BDirector	Buyindirect	4,000	319.24	$1.28M	143,000	Form 4
2025-11-05	Zeidel DarrenGeneral Counsel	Sale	7,570	344.42	$2.61M	21,483	Form 4
2025-11-05	Zeidel DarrenGeneral Counsel	Sale	1,230	345.17	$424,559	20,253	Form 4
2024-11-27	Simon Mindy F.Chief Operating Officer	Sale	650	394.34	$256,321	1,816	Form 4
2024-11-26	Stevens LisaChief Administrative Officer	Sale	1,275	387.68	$494,292	8,077	Form 4

Grants, exercises and other transactions

Pay, tax and paperwork rather than a choice to trade at the market price. Two years.

65 × shares withheld for tax38 × grant or award29 × option exercise26 × gift

Show them

Date	Insider	What	Shares	Price	Holds after	Filing
2026-07-01	Reese EdmundChief Financial Officer	Option exercise M	+3,975	–	6,099	Form 4
2026-07-01	Reese EdmundChief Financial Officer	Shares withheld for tax F	−2,198	343.56	3,901	Form 4
2026-06-25	Karaboutis AdrianaDirector	Grant or award A	+776	–	2,792	Form 4
2026-06-25	Karaboutis AdrianaDirector	Shares withheld for tax F	−186	315.95	2,606	Form 4
2026-06-25	Jenkins Jo AnnDirector	Grant or award A	+776	–	1,060	Form 4
2026-06-25	Jenkins Jo AnnDirector	Shares withheld for tax F	−186	315.95	874	Form 4
2026-06-25	Smith Sarah GDirector	Grant or award A	+776	–	2,300	Form 4
2026-06-25	Smith Sarah GDirector	Shares withheld for tax F	−186	315.95	2,114	Form 4
2026-06-25	Cai Jin-YongDirector	Grant or award A	+776	–	8,241	Form 4
2026-06-25	Cai Jin-YongDirector	Shares withheld for tax F	−397	315.95	7,845	Form 4
2026-06-25	Spruell ByronDirector	Grant or award A	+776	–	6,563	Form 4
2026-06-25	Spruell ByronDirector	Shares withheld for tax F	−186	315.95	6,377	Form 4
2026-06-25	Campbell Jeffrey CDirector	Grant or award A	+776	–	12,807	Form 4
2026-06-25	Campbell Jeffrey CDirector	Shares withheld for tax F	−186	315.95	12,621	Form 4
2026-06-25	Santona GloriaDirector	Grant or award A	+776	–	22,648	Form 4
2026-06-25	Santona GloriaDirector	Shares withheld for tax F	−186	315.95	22,462	Form 4
2026-06-25	Notebaert Richard CDirector	Grant or award A	+776	–	28,514	Form 4
2026-06-25	Notebaert Richard CDirector	Shares withheld for tax F	−186	315.95	28,328	Form 4
2026-06-25	Stavridis James G.Director	Grant or award A	+776	–	1,564	Form 4
2026-06-25	Stavridis James G.Director	Shares withheld for tax F	−186	315.95	1,377	Form 4
2026-06-25	Francis Cheryl ADirector	Grant or award A	+776	–	29,480	Form 4
2026-06-25	Francis Cheryl ADirector	Shares withheld for tax F	−186	315.95	29,294	Form 4
2026-06-25	Alvarez Jose AntonioDirector	Grant or award A	+776	–	1,643	Form 4
2026-06-25	Alvarez Jose AntonioDirector	Shares withheld for tax F	−372	315.95	1,270	Form 4
2026-06-25	Knight Lester BDirector	Grant or award A	+1,488	–	5,227	Form 4
2026-05-12	Notebaert Richard CDirector	Gift G	−1,438	–	27,738	Form 4
2026-03-13	Marcell AndyGlobal CEO, Solution Lines	Option exercise M	+1,166	–	9,149	Form 4
2026-03-13	Marcell AndyGlobal CEO, Solution Lines	Shares withheld for tax F	−568	321.41	8,582	Form 4
2026-03-13	Marcell AndyGlobal CEO, Solution Lines	Option exercise M	+464	–	9,046	Form 4
2026-03-13	Marcell AndyGlobal CEO, Solution Lines	Shares withheld for tax F	−226	321.41	8,820	Form 4
2026-03-13	Goltermann LoriCEO, Regions & North America	Option exercise M	+228	–	6,731	Form 4
2026-03-13	Goltermann LoriCEO, Regions & North America	Shares withheld for tax F	−99	321.41	6,632	Form 4
2026-03-13	Goltermann LoriCEO, Regions & North America	Option exercise M	+290	–	6,922	Form 4
2026-03-13	Goltermann LoriCEO, Regions & North America	Shares withheld for tax F	−126	321.41	6,795	Form 4
2026-03-13	Corona AnneChief Commercial Officer	Option exercise M	+193	–	4,183	Form 4
2026-03-13	Corona AnneChief Commercial Officer	Shares withheld for tax F	−86	321.41	4,098	Form 4
2026-03-13	Corona AnneChief Commercial Officer	Option exercise M	+174	–	4,272	Form 4
2026-03-13	Corona AnneChief Commercial Officer	Shares withheld for tax F	−77	321.41	4,195	Form 4
2026-02-19	Case Gregory CDirector, President & CEO	Gift G	−7,500	–	29,912	Form 4
2026-02-19	Case Gregory CDirector, President & CEO	Gift G	−7,500	–	22,412	Form 4
2026-02-19	Case Gregory CDirector, President & CEO	Gift G	−11,206	–	11,206	Form 4
2026-02-19	Case Gregory CDirector, President & CEO	Gift G	−11,206	–	0	Form 4
2026-02-19	Case Gregory CDirector, President & CEO	Gift G	+11,206	–	175,170	Form 4
2026-02-19	Case Gregory CDirector, President & CEO	Gift G	+11,206	–	175,169	Form 4
2026-02-18	Stevens LisaChief Administrative Officer	Gift G	−32	–	26,321	Form 4
2026-02-17	Case Gregory CDirector, President & CEO	Option exercise M	+2,357	–	941,139	Form 4
2026-02-17	Case Gregory CDirector, President & CEO	Shares withheld for tax F	−1,002	325.96	940,137	Form 4
2026-02-17	Case Gregory CDirector, President & CEO	Gift G	−3,214	–	936,923	Form 4
2026-02-17	Case Gregory CDirector, President & CEO	Gift G	−3,214	–	933,709	Form 4
2026-02-17	Case Gregory CDirector, President & CEO	Gift G	+3,214	–	132,243	Form 4
2026-02-17	Case Gregory CDirector, President & CEO	Gift G	+3,214	–	132,243	Form 4
2026-02-13	Reese EdmundChief Financial Officer	Option exercise M	+598	–	2,375	Form 4
2026-02-13	Reese EdmundChief Financial Officer	Shares withheld for tax F	−251	321.70	2,124	Form 4
2026-02-13	Simon Mindy F.Chief Operating Officer	Option exercise M	+254	–	6,605	Form 4
2026-02-13	Simon Mindy F.Chief Operating Officer	Shares withheld for tax F	−109	321.70	6,496	Form 4
2026-02-13	Stevens LisaChief Administrative Officer	Option exercise M	+1,451	–	26,808	Form 4
2026-02-13	Stevens LisaChief Administrative Officer	Shares withheld for tax F	−701	321.70	26,106	Form 4
2026-02-13	Stevens LisaChief Administrative Officer	Option exercise M	+478	–	26,584	Form 4
2026-02-13	Stevens LisaChief Administrative Officer	Shares withheld for tax F	−231	321.70	26,353	Form 4
2026-02-13	Zeidel DarrenGeneral Counsel	Option exercise M	+871	–	25,564	Form 4
2026-02-13	Zeidel DarrenGeneral Counsel	Shares withheld for tax F	−386	321.70	25,178	Form 4
2026-02-13	Zeidel DarrenGeneral Counsel	Option exercise M	+209	–	25,387	Form 4
2026-02-13	Zeidel DarrenGeneral Counsel	Shares withheld for tax F	−93	321.70	25,294	Form 4
2026-02-12	Case Gregory CDirector, President & CEO	Grant or award A	+71,868	–	968,498	Form 4
2026-02-12	Case Gregory CDirector, President & CEO	Shares withheld for tax F	−32,246	314.49	936,252	Form 4
2026-02-12	Case Gregory CDirector, President & CEO	Grant or award A	+4,589	–	940,841	Form 4
2026-02-12	Case Gregory CDirector, President & CEO	Shares withheld for tax F	−2,059	314.49	938,782	Form 4
2026-02-12	Corona AnneChief Commercial Officer	Grant or award A	+3,171	–	5,395	Form 4
2026-02-12	Corona AnneChief Commercial Officer	Shares withheld for tax F	−1,405	314.49	3,990	Form 4
2026-02-12	Goltermann LoriCEO, Regions & North America	Grant or award A	+6,937	–	9,216	Form 4
2026-02-12	Goltermann LoriCEO, Regions & North America	Shares withheld for tax F	−2,713	314.49	6,503	Form 4
2026-02-12	Marcell AndyGlobal CEO, Solution Lines	Grant or award A	+12,882	–	14,559	Form 4
2026-02-12	Marcell AndyGlobal CEO, Solution Lines	Shares withheld for tax F	−6,576	314.49	7,983	Form 4
2026-02-12	Simon Mindy F.Chief Operating Officer	Grant or award A	+5,550	–	8,729	Form 4
2026-02-12	Simon Mindy F.Chief Operating Officer	Shares withheld for tax F	−2,378	314.49	6,351	Form 4
2026-02-12	Stevens LisaChief Administrative Officer	Grant or award A	+15,856	–	32,925	Form 4
2026-02-12	Stevens LisaChief Administrative Officer	Shares withheld for tax F	−7,568	314.49	25,357	Form 4
2026-02-12	Zeidel DarrenGeneral Counsel	Grant or award A	+7,135	–	27,388	Form 4
2026-02-12	Zeidel DarrenGeneral Counsel	Shares withheld for tax F	−2,696	314.49	24,693	Form 4
2025-12-05	Knight Lester BDirector	Gift G	−7,878	–	26,033	Form 4
2025-11-21	Marcell AndyGlobal CEO, Solution Lines	Option exercise M	+86	–	1,719	Form 4
2025-11-21	Marcell AndyGlobal CEO, Solution Lines	Shares withheld for tax F	−42	346.51	1,677	Form 4
2025-11-21	Goltermann LoriCEO, Regions & North America	Option exercise M	+156	–	2,324	Form 4
2025-11-21	Goltermann LoriCEO, Regions & North America	Shares withheld for tax F	−68	346.51	2,255	Form 4
2025-11-21	Corona AnneChief Commercial Officer	Option exercise M	+132	–	2,290	Form 4
2025-11-21	Corona AnneChief Commercial Officer	Shares withheld for tax F	−65	346.51	2,224	Form 4
2025-11-14	Simon Mindy F.Chief Operating Officer	Option exercise M	+1,970	–	3,786	Form 4
2025-11-14	Simon Mindy F.Chief Operating Officer	Shares withheld for tax F	−606	350.13	3,179	Form 4
2025-11-12	Santona GloriaDirector	Gift G	−17,736	–	21,872	Form 4
2025-11-12	Santona GloriaDirector	Gift G	+17,736	–	17,736	Form 4
2025-09-26	Jenkins Jo AnnDirector	Grant or award A	+547	–	547	Form 4
2025-09-26	Jenkins Jo AnnDirector	Shares withheld for tax F	−263	356.08	284	Form 4
2025-07-01	Reese EdmundChief Financial Officer	Option exercise M	+3,975	–	3,975	Form 4
2025-07-01	Reese EdmundChief Financial Officer	Shares withheld for tax F	−2,198	356.93	1,777	Form 4
2025-06-26	Cai Jin-YongDirector	Grant or award A	+637	–	7,784	Form 4
2025-06-26	Cai Jin-YongDirector	Shares withheld for tax F	−319	353.55	7,465	Form 4
2025-06-26	Campbell Jeffrey CDirector	Grant or award A	+637	–	12,184	Form 4
2025-06-26	Campbell Jeffrey CDirector	Shares withheld for tax F	−153	353.55	12,031	Form 4
2025-06-26	Francis Cheryl ADirector	Grant or award A	+637	–	28,857	Form 4
2025-06-26	Francis Cheryl ADirector	Shares withheld for tax F	−153	353.55	28,704	Form 4
2025-06-26	Karaboutis AdrianaDirector	Grant or award A	+637	–	2,169	Form 4
2025-06-26	Karaboutis AdrianaDirector	Shares withheld for tax F	−153	353.55	2,016	Form 4
2025-06-26	Notebaert Richard CDirector	Grant or award A	+637	–	29,329	Form 4
2025-06-26	Notebaert Richard CDirector	Shares withheld for tax F	−153	353.55	29,176	Form 4
2025-06-26	Santona GloriaDirector	Grant or award A	+637	–	39,761	Form 4
2025-06-26	Santona GloriaDirector	Shares withheld for tax F	−153	353.55	39,608	Form 4
2025-06-26	Smith Sarah GDirector	Grant or award A	+637	–	1,677	Form 4
2025-06-26	Smith Sarah GDirector	Shares withheld for tax F	−153	353.55	1,524	Form 4
2025-06-26	Spruell ByronDirector	Grant or award A	+637	–	5,940	Form 4
2025-06-26	Spruell ByronDirector	Shares withheld for tax F	−153	353.55	5,787	Form 4
2025-06-26	Alvarez Jose AntonioDirector	Grant or award A	+637	–	1,173	Form 4
2025-06-26	Alvarez Jose AntonioDirector	Shares withheld for tax F	−306	353.55	867	Form 4
2025-06-26	Knight Lester BDirector	Grant or award A	+1,273	–	3,739	Form 4
2025-06-26	Stavridis James G.Director	Grant or award A	+637	–	941	Form 4
2025-06-26	Stavridis James G.Director	Shares withheld for tax F	−153	353.55	788	Form 4
2025-05-29	Notebaert Richard CDirector	Gift G	−1,795	–	28,692	Form 4
2025-03-14	Neller MichaelPrincipal Accounting Officer	Option exercise M	+56	–	8,234	Form 4
2025-03-14	Neller MichaelPrincipal Accounting Officer	Shares withheld for tax F	−25	398.79	8,209	Form 4
2025-02-21	Stevens LisaChief Administrative Officer	Gift G	−26	–	17,022	Form 4
2025-02-18	Notebaert Richard CDirector	Gift G	−1,290	–	30,487	Form 4
2025-02-18	Case Gregory CDirector, Chief Executive Officer	Gift G	−977	–	471,519	Form 4
2025-02-18	Case Gregory CDirector, Chief Executive Officer	Gift G	−977	–	470,542	Form 4
2025-02-18	Case Gregory CDirector, Chief Executive Officer	Gift G	+977	–	129,029	Form 4
2025-02-18	Case Gregory CDirector, Chief Executive Officer	Gift G	+977	–	129,029	Form 4
2025-02-14	Zeidel DarrenGeneral Counsel	Option exercise M	+374	–	28,734	Form 4
2025-02-14	Zeidel DarrenGeneral Counsel	Shares withheld for tax F	−166	386.99	28,569	Form 4
2025-02-14	Zeidel DarrenGeneral Counsel	Option exercise M	+870	–	29,439	Form 4
2025-02-14	Zeidel DarrenGeneral Counsel	Shares withheld for tax F	−385	386.99	29,053	Form 4
2025-02-14	Neller MichaelPrincipal Accounting Officer	Option exercise M	+146	–	8,222	Form 4
2025-02-14	Neller MichaelPrincipal Accounting Officer	Shares withheld for tax F	−44	386.99	8,178	Form 4
2025-02-14	Andersen EricPresident	Option exercise M	+779	–	176,173	Form 4
2025-02-14	Andersen EricPresident	Shares withheld for tax F	−379	386.99	175,793	Form 4
2025-02-14	Andersen EricPresident	Option exercise M	+2,417	–	178,210	Form 4
2025-02-14	Andersen EricPresident	Shares withheld for tax F	−1,177	386.99	177,033	Form 4
2025-02-14	Stevens LisaChief Administrative Officer	Option exercise M	+498	–	16,585	Form 4
2025-02-14	Stevens LisaChief Administrative Officer	Shares withheld for tax F	−252	386.99	16,333	Form 4
2025-02-14	Stevens LisaChief Administrative Officer	Option exercise M	+1,450	–	17,783	Form 4
2025-02-14	Stevens LisaChief Administrative Officer	Shares withheld for tax F	−735	386.99	17,048	Form 4
2025-02-14	Case Gregory CDirector, Chief Executive Officer	Option exercise M	+2,357	–	473,505	Form 4
2025-02-14	Case Gregory CDirector, Chief Executive Officer	Shares withheld for tax F	−1,009	386.99	472,496	Form 4
2025-02-14	Case Gregory CDirector, Chief Executive Officer	Gift G	−18,478	–	18,478	Form 4
2025-02-14	Case Gregory CDirector, Chief Executive Officer	Gift G	−18,478	–	0	Form 4
2025-02-14	Case Gregory CDirector, Chief Executive Officer	Gift G	+18,478	–	163,964	Form 4
2025-02-14	Case Gregory CDirector, Chief Executive Officer	Gift G	+18,478	–	163,963	Form 4
2025-02-13	Zeidel DarrenGeneral Counsel	Grant or award A	+8,222	–	31,626	Form 4
2025-02-13	Zeidel DarrenGeneral Counsel	Shares withheld for tax F	−3,266	390.29	28,360	Form 4
2025-02-13	Neller MichaelPrincipal Accounting Officer	Grant or award A	+2,313	–	8,764	Form 4
2025-02-13	Neller MichaelPrincipal Accounting Officer	Shares withheld for tax F	−688	390.29	8,076	Form 4
2025-02-13	Andersen EricPresident	Grant or award A	+28,265	–	189,440	Form 4
2025-02-13	Andersen EricPresident	Shares withheld for tax F	−14,046	390.29	175,394	Form 4
2025-02-13	Stevens LisaChief Administrative Officer	Grant or award A	+15,418	–	23,523	Form 4
2025-02-13	Stevens LisaChief Administrative Officer	Shares withheld for tax F	−7,436	390.29	16,087	Form 4
2025-02-13	Case Gregory CDirector, Chief Executive Officer	Grant or award A	+83,333	–	505,164	Form 4
2025-02-13	Case Gregory CDirector, Chief Executive Officer	Shares withheld for tax F	−37,649	390.29	467,515	Form 4
2025-02-13	Case Gregory CDirector, Chief Executive Officer	Grant or award A	+6,628	–	474,143	Form 4
2025-02-13	Case Gregory CDirector, Chief Executive Officer	Shares withheld for tax F	−2,994	390.29	471,148	Form 4
2024-11-15	Simon Mindy F.Chief Operating Officer	Option exercise M	+1,970	–	3,339	Form 4
2024-11-15	Simon Mindy F.Chief Operating Officer	Shares withheld for tax F	−874	379.29	2,466	Form 4

How to read it

Buy, sale: Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
Plan: A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
Holds after: The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
Value: Shares times the price the form reports, which is often an average over several fills on the day.

Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.

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