FRONTIER CAPITAL MANAGEMENT CO LLC

Position in AON — Aon plc

CIK 351173 Boston, MA

Position in AON

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$11,294,717

-$9,381,580 QoQ

Shares Held

34,992

-40.3% QoQ

Ownership

0.016%

of shares outstanding

% of Portfolio

0.12%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2020

24 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Financial Services · as of Mar 31, 2026

FRONTIER CAPITAL MANAGEMENT CO LLC holds $59,741,827 across 4 Insurance Brokers names. AON ranks #3 (18.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BWIN	Baldwin Insurance Group, Inc.	1,102,452	$24,187,796
2	NP	Neptune Insurance Holdings Inc.	986,848	$23,871,853
3	AON	Aon plc This page	34,992	$11,294,717
4	AJG	Arthur J. Gallagher & Co.	1,789	$387,461

24 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$11,294,717	34,992	-40.3%	Shares	Sole	2026-05-15
2025-12-31	$20,676,297	58,593	-58.0%	Shares	Sole	2026-02-17
2025-09-30	$49,726,150	139,453	-25.4%	Shares	Sole	2025-11-14
2025-06-30	$66,658,465	186,844	+4.4%	Shares	Sole	2025-08-14
2025-03-31	$71,425,935	178,972	+24.3%	Shares	Sole	2025-05-15
2024-12-31	$51,732,328	144,037	-5.9%	Shares	Sole	2025-02-14
2024-09-30	$52,935,432	152,997	+27.0%	Shares	Sole	2024-11-14
2024-06-30	$35,364,353	120,459	-4.5%	Shares	Sole	2024-08-14
2024-03-31	$42,093,772	126,135	-7.6%	Shares	Sole	2024-05-15
2023-12-31	$39,742,855	136,564	-46.4%	Shares	Sole	2024-02-14
2023-09-30	$82,546,736	254,601	-26.0%	Shares	Sole	2023-11-14
2023-06-30	$118,754,323	344,016	-38.0%	Shares	Sole	2023-08-14
2023-03-31	$175,006,443	555,065	+7.9%	Shares	Sole	2023-05-15
2022-12-31	$154,365,303	514,311	-3.3%	Shares	Sole	2023-02-14
2022-09-30	$142,407,192	531,628	-4.9%	Shares	Sole	2022-11-14
2022-06-30	$150,820,158	559,256	+37.2%	Shares	Sole	2022-07-20
2022-03-31	$132,746,977	407,662	-13.7%	Shares	Sole	2022-04-14
2021-12-31	$141,919,923	472,185	-12.0%	Shares	Sole	2022-01-19
2021-09-30	$153,377,331	536,716	+2.9%	Shares	Sole	2021-10-19
2021-06-30	$124,550,586	521,656	+6.3%	Shares	Sole	2021-08-09
2021-03-31	$112,932,005	490,774	-4.3%	Shares	Sole	2021-05-13
2020-12-31	$108,380,664	512,996	+0.4%	Shares	Sole	2021-01-19
2020-09-30	$105,403,621	510,924	-17.1%	Shares	Sole	2020-11-16
2020-06-30	$118,707,084	616,340	—	Shares	Sole	2020-07-17
No filing history on record for this holder in this stock.