Aon Institutional Ownership

NYSE AON

$294.51 -2.20 (-0.74%)

As of: Oct 21, 2026 · 3:59 PM EDT

Institutions by Trading Activity

1,254 Institutions

Increased 603 48.1%

Unchanged 203 16.2%

Reduced 448 35.7%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

90.46%

▲+3.17 pp QoQ

Shares Held by Institutions

192.86Mn

of 213.20Mn outstanding

▲+3.10% QoQ

Shares Outstanding

213.20Mn

20.34Mn held outside 13F filers

Institutional Investors

1,254

filed 13F for Jun 2026

▲+3 vs prior quarter

Net Shares Added (QoQ)

+5.80Mn

accumulated since last quarter

Value of Holdings

$57.22Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Aon plc (NYSE:AON) was reported as a holding by 1,253 institutional investors in 13F filings for the quarter ended June 30, 2026.

Collectively, these holders controlled 90.46% of AON's outstanding shares in Q2 2026, up from 87.29% in Q1 2026.
Total holdings of AON shares rose 3.10% from Q1 2026, and the holder count rose 3.13% from Q2 2025.
Of the 1,253 holders of AON in Q2 2026, 603 added to their positions, 447 reduced their stakes and 203 left their positions unchanged.
In total, institutional investors held 192.86Mn shares of AON at the end of Q2 2026, up 5.8Mn from the prior quarter and up 8.99Mn from a year earlier.
As of June 30, 2026, the biggest holder of AON was BlackRock, Inc. with 15.72Mn shares, or 7.37% of shares outstanding.
The biggest increases in AON positions during Q2 2026 came from JPMorgan Chase & Co (+6.53Mn shares), Vanguard Portfolio Management LLC (+2.64Mn shares), T. Rowe Price Associates Inc (+1.86Mn shares), Arrowstreet Capital, Limited Partnership (+1.82Mn shares) and AQR Capital Management LLC (+926.04K shares).
On the other side, among holders that kept a position in AON, the largest reductions in Q2 2026 came from UBS Asset Management Americas (-1.24Mn shares), Polen Capital Management LLC (-1.19Mn shares), Farallon Capital Management, L.L.C. (-1.13Mn shares), Sustainable Growth Advisers, LP (-809.52K shares) and Massachusetts Financial Services Co (-742.7K shares).
Per Business Quant data, the 10 largest holders of AON at the end of Q2 2026 were BlackRock, Inc. (15.72Mn shares), Vanguard Capital Management LLC (13.6Mn shares), JPMorgan Chase & Co (12.18Mn shares), Capital World Investors (11.71Mn shares), State Street Corp (9.42Mn shares), Dodge & Cox (8.59Mn shares), Massachusetts Financial Services Co (7.62Mn shares), Vanguard Portfolio Management LLC (7.2Mn shares), Morgan Stanley (6.21Mn shares) and Geode Capital Management, LLC (5.18Mn shares).

Form 13F Holdings

1,257 Institutional Holders

Report period 30 Jun, 2026

Total shares held 192.86Mn

Of outstanding 90.46%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	15,716,429	7.37%	▼432,078	-2.68%	$5.21Bn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	13,603,465	6.38%	▲21,709	+0.16%	$4.51Bn
3	Jpmorgan Chase & Co	0000019617	12,175,974	5.71%	▲6,534,543	+115.83%	$3.99Bn
4	Capital World Investors	0001422849	11,711,650	5.49%	▲233,862	+2.04%	$3.88Bn
5	State Street Corp	0000093751	9,416,039	4.42%	▲196,266	+2.13%	$3.12Bn
6	DODGE & COX	0000200217	8,593,144	4.03%	▲477,049	+5.88%	$2.85Bn
7	MASSACHUSETTS FINANCIAL SERVICES CO /MA/	0000912938	7,615,397	3.57%	▼742,700	-8.89%	$2.58Bn
8	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	7,202,991	3.38%	▲2,643,956	+57.99%	$2.39Bn
9	Morgan Stanley	0000895421	6,214,787	2.92%	▼160,158	-2.51%	$2.06Bn
10	GEODE CAPITAL MANAGEMENT, LLC	0001214717	5,180,553	2.43%	▼63,756	-1.22%	$1.71Bn
11	Bank of New York Mellon Corp	0001390777	3,191,212	1.50%	▼129,880	-3.91%	$1.06Bn
12	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	3,136,640	1.47%	▲1,855,714	+144.87%	$1.04Mn
13	NORGES BANK	0001374170	2,796,760	1.31%	▲2,796,760	0.00%	$927.66Mn
14	Mitsubishi UFJ Asset Management Co., Ltd.	0001466546	2,753,913	1.29%	▲237,276	+9.43%	$913.45Mn
15	Independent Franchise Partners LLP	0001483866	2,646,943	1.24%	▲58,941	+2.28%	$877.96Mn
16	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	2,614,754	1.23%	▲1,817,336	+227.90%	$867.29Mn
17	DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	0001694217	2,255,768	1.06%	▼692,642	-23.49%	$748.22Mn
18	Boston Partners	0001386060	2,089,773	0.98%	▲134,741	+6.89%	$695.75Mn
19	Northern Trust Corp	0000073124	2,040,534	0.96%	▼41,571	-2.00%	$676.82Mn
20	AQR CAPITAL MANAGEMENT LLC	0001167557	1,905,800	0.89%	▲926,045	+94.52%	$623.01Mn

Showing 1 to 20 of 1,257 holders