Boston Partners

Position in AON — Aon plc

CIK 1386060 BOSTON, MA

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Position in AON

as of Jun 30, 2026 · filed Aug 4, 2026 Compact

Position Value

$693,156,804

+$62,111,577 QoQ

Shares Held

2,089,773

+6.9% QoQ

Ownership

0.985%

of shares outstanding

% of Portfolio

0.62%

of 13F equity value

Holder Rank

#18

of 1,247 holders

Holding Since

Jun 2020

25 quarters on record

Voting authority Sole 67% Shared 0% None 33%

Common Shares in AON Over Time

Shares Held

Position Value (USD)

Position in Insurance Brokers

Financial Services · as of Jun 30, 2026

Boston Partners holds $803,715,030 across 4 Insurance Brokers names. AON ranks #1 (86.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AON	Aon plc This page	2,089,773	$693,156,804
2	MRSH	Marsh & Mclennan Companies, Inc.	457,791	$76,300,025
3	BWIN	Baldwin Insurance Group, Inc.	1,192,820	$31,705,154
4	AJG	Arthur J. Gallagher & Co.	11,121	$2,553,047

All Filings in AON

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$693,156,804	2,089,773	+6.9%	Shares	Defined	2026-08-04
2026-03-31	$631,045,227	1,955,032	+19.6%	Shares	Defined	2026-05-11
2025-12-31	$576,961,268	1,635,007	-4.5%	Shares	Other	2026-02-13
2025-09-30	$610,197,524	1,711,250	+15.5%	Shares	Defined	2025-11-13
2025-06-30	$528,415,786	1,481,152	-30.2%	Shares	Other	2025-08-12
2025-03-31	$846,712,136	2,121,607	+4.2%	Shares	Defined	2025-05-13
2024-12-31	$731,249,040	2,035,998	+13.7%	Shares	Defined	2025-02-11
2024-09-30	$619,769,116	1,791,292	+33.3%	Shares	Defined	2024-11-12
2024-06-30	$394,593,243	1,344,074	+36.5%	Shares	Defined	2024-08-14
2024-03-31	$328,528,983	984,445	+53.6%	Shares	Defined	2024-05-28
2023-12-31	$186,488,525	640,810	-47.1%	Shares	Other	2024-02-07
2023-09-30	$393,001,001	1,212,143	-20.1%	Shares	Defined	2023-11-08
2023-06-30	$523,636,640	1,516,908	-1.0%	Shares	Other	2023-08-10
2023-03-31	$483,069,995	1,532,145	+47.0%	Shares	Other	2023-05-09
2022-12-31	$312,863,834	1,042,393	-7.3%	Shares	Defined	2023-02-08
2022-09-30	$301,337,409	1,124,939	+3.4%	Shares	Other	2022-11-09
2022-06-30	$293,403,479	1,087,969	+10.5%	Shares	Other	2022-08-10
2022-03-31	$320,492,859	984,224	+2.3%	Shares	Other	2022-05-10
2021-12-31	$289,053,961	961,718	-2.2%	Shares	Other	2022-02-04
2021-09-30	$280,976,492	983,226	+3.1%	Shares	Other	2021-11-05
2021-06-30	$227,591,284	953,222	+2.4%	Shares	Defined	2021-08-12
2021-03-31	$214,177,411	930,761	-1.7%	Shares	Other	2021-05-10
2020-12-31	$200,138,182	947,310	-14.5%	Shares	Defined	2021-02-10
2020-09-30	$228,703,972	1,108,599	+0.2%	Shares	Other	2020-11-13
2020-06-30	$213,127,885	1,106,583	—	Shares	Other	2020-08-12
No filing history on record for this holder in this stock.