Aon plc (AON) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

217,097,532Shares Outstanding

862,687Shares held by institutions

$281,201,455Value of institutional holdings

84.93%Institutional ownership %

2.52%Shares Changed QoQ

1,202No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Aon plc (NYSE:AON) currently has 1202 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

Aon saw its institutional ownership percentage fell to 84.9% in December 2025 from 85.1% in September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by 2.52%, with a year-over-year an increase of 3.44% in the count of filers.
Of these 1202 institutional investors, 537 increased their holdings in Aon, while 449 of them reduced positions, and 216 investors maintained their exposure.
The total number of shares held by institutions in Aon increased to 184.37Mn as of December 2025, a net change of up by 4.54Mn shares quarter on quarter, and down 8.44Mn shares year over year.
As of December 31, 2025, VANGUARD GROUP INC held Aon's largest shareholding position with over 20.17Mn shares, representing 9.29% of total outstanding shares.
Among the most significant buyers of Aon during December 2025 were DODGE & COX (4.39Mn), NORGES BANK (3.28Mn), DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main (2.39Mn), FMR LLC (757.82K), Southpoint Capital Advisors LP (650.00K).
Leading sellers of Aon stock in December 2025 included Mawer Investment Management Ltd. (1.02Mn), POLEN CAPITAL MANAGEMENT LLC (643.87K), VIKING GLOBAL INVESTORS LP (630.97K), MORGAN STANLEY (565.88K), Neuberger Berman Group LLC (526.06K).
The top 10 institutional holders of Aon for the quarter ending December 2025 included VANGUARD GROUP INC (20.17Mn), BlackRock, Inc. (16.24Mn), Capital World Investors (12.25Mn), STATE STREET CORP (9.20Mn), MASSACHUSETTS FINANCIAL SERVICES CO /MA/ (8.55Mn), DODGE & COX (7.85Mn), MORGAN STANLEY (5.57Mn), GEODE CAPITAL MANAGEMENT, LLC (5.14Mn), BERKSHIRE HATHAWAY INC (3.60Mn), Bank of New York Mellon Corp (3.48Mn).

1,202 Institutional Holders

862,687 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	20,171,049	191,658	0.96%	$7,117,959,771.00
BlackRock, Inc.	31 Dec, 2025	16,236,934	390,348	2.46%	$5,729,689,450.00
Capital World Investors	31 Dec, 2025	12,252,904	176,207	1.46%	$4,323,850,187.00
STATE STREET CORP	31 Dec, 2025	9,203,973	-25,491	-0.28%	$3,247,903,482.00
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	31 Dec, 2025	8,545,036	-212,650	-2.43%	$3,015,372,303.00
DODGE & COX	31 Dec, 2025	7,852,456	4,387,773	126.64%	$2,770,974,673.00
MORGAN STANLEY	31 Dec, 2025	5,570,506	-565,880	-9.22%	$1,965,721,026.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	5,141,363	28,066	0.55%	$1,810,725,639.00
BERKSHIRE HATHAWAY INC	31 Dec, 2025	3,602,995	-497,005	-12.12%	$1,271,424,876.00
Bank of New York Mellon Corp	31 Dec, 2025	3,479,061	-236,285	-6.36%	$1,227,690,862.00
NORGES BANK	31 Dec, 2025	3,275,848	3,275,848	0.00%	$1,155,981,242.00
JPMORGAN CHASE & CO	31 Dec, 2025	3,192,216	-154,981	-4.63%	$1,126,469,628.00
FARALLON CAPITAL MANAGEMENT LLC	31 Dec, 2025	2,665,238	387,221	17.00%	$940,509,185.00
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	31 Dec, 2025	2,415,006	2,388,314	8,947.68%	$852,207,318.00
EAGLE CAPITAL MANAGEMENT LLC	31 Dec, 2025	2,269,414	-14,737	-0.65%	$800,830,660.00
Independent Franchise Partners LLP	31 Dec, 2025	2,115,523	19,037	0.91%	$746,525,756.00
NORTHERN TRUST CORP	31 Dec, 2025	2,099,652	-113,417	-5.12%	$740,925,198.00
Veritas Asset Management LLP	31 Dec, 2025	1,992,453	-61,220	-2.98%	$703,096,815.00
WCM INVESTMENT MANAGEMENT, LLC	31 Dec, 2025	1,986,128	-51,715	-2.54%	$708,034,853.00
POLEN CAPITAL MANAGEMENT LLC	31 Dec, 2025	1,846,294	-643,873	-25.86%	$651,520,305.00

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