Main Street Research LLC

Position in AON — Aon plc

CIK 1513211 SAUSALITO, CA

Position in AON

as of Jun 30, 2026 · filed Jul 29, 2026 Compact

Position Value

$208,301

+$7,532 QoQ

Shares Held

628

+1.0% QoQ

Ownership

0.000%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

#1,002

of 1,252 holders

Holding Since

Sep 2021

18 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Financial Services · as of Jun 30, 2026

Main Street Research LLC holds $208,301 across 1 Insurance Brokers name. AON ranks #1 (100.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)	Open
1	AON	Aon plc This page	628	$208,301

18 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$208,301	628	+1.0%	Shares	Sole	2026-07-29
2026-03-31	$200,769	622	-24.2%	Shares	Sole	2026-04-30
2025-12-31	$289,714	821	+30.9%	Shares	Sole	2026-02-09
2025-09-30	$223,575	627	+1.1%	Shares	Sole	2025-11-13
2025-06-30	$221,191	620	-0.3%	Shares	Sole	2025-08-05
2025-03-31	$248,233	622	-13.6%	Shares	Sole	2025-04-30
2024-12-31	$258,595	720	0.0%	Shares	Sole	2025-02-07
2024-09-30	$249,112	720	0.0%	Shares	Sole	2024-11-12
2024-06-30	$211,377	720	-12.2%	Shares	Sole	2024-07-29
2024-03-31	$273,650	820	-19.8%	Shares	Sole	2024-05-01
2023-12-31	$297,422	1,022	-98.5%	Shares	Sole	2024-01-30
2023-09-30	$21,442,289	66,135	+84.3%	Shares	Sole	2023-11-03
2023-06-30	$12,385,085	35,878	-2.7%	Shares	Sole	2023-08-08
2023-03-31	$11,629,156	36,884	+5094.9%	Shares	Sole	2023-05-01
2022-12-31	$213,099	710	0.0%	Shares	Sole	2023-02-06
2022-03-31	$231,197	710	-4.7%	Shares	Sole	2022-05-05
2021-12-31	$223,917	745	-8.0%	Shares	Sole	2022-02-09
2021-09-30	$231,473	810	—	Shares	Sole	2021-11-12
No filing history on record for this holder in this stock.