Aon Ownership | Who Owns Aon?

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Aon Ownership Summary

Aon is owned by 19.37% institutional investors, 3.05% insiders, and 77.59% retail investors. Vanguard group is the largest institutional shareholder, holding 9.38% of AON shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 3.03% of its assets in Aon shares.

AON Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Aon	19.37%	3.05%	77.59%
Sector	Financial Services Stocks	32.19%	15.44%	52.37%
Industry	Insurance Brokers Stocks	23.76%	15.83%	60.40%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	20.17M	9.38%	$7.12B
Blackrock	15.27M	7.67%	$4.48B
Blackrock funding, inc. /de	16.24M	7.55%	$5.73B
Capital world investors	12.25M	5.70%	$4.32B
State street	9.23M	4.27%	$3.29B
Massachusetts financial services co /ma/	8.55M	3.97%	$3.02B
Morgan stanley	5.57M	2.59%	$1.97B
Geode capital management	5.14M	2.39%	$1.81B
Hps investment partners	4.34M	2.01%	$1.73B
Berkshire hathaway	4.10M	1.90%	$1.46B

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Hps investment partners	4.34M	99.01%	$1.73B
Lfl advisers	90.15K	11.13%	$32.14M
Aryeh capital management	32.30K	9.64%	$11.52M
Altrinsic global advisors	682.89K	9.01%	$243.50M
Lts one management lp	62.50K	7.94%	$22.29M
Veritas asset management llp	2.05M	7.82%	$732.30M
Gluskin sheff & assoc	169.77K	7.65%	$60.54M
Bloombergsen	262.75K	6.77%	$92.72M
Broad run investment management	106.62K	6.22%	$38.02M
Cryder capital partners llp	295.15K	6.15%	$104.15M

Top Buyers

Holder	Shares	% Assets	Change
Dodge & cox	3.46M	0.67%	3.46M
Norges bank	3.28M	0.12%	3.28M
Viking global investors lp	1.41M	1.31%	1.41M
Blackrock	15.27M	0.10%	781.42K
Independent franchise partners llp	2.10M	4.93%	615.57K

Top Sellers

Holder	Shares	% Assets	Change
Mawer investment management	1.48M	2.92%	-1.02M
Meritage group lp	-	-	-996.21K
Artisan partners limited partnership	1.27M	0.64%	-909.27K
Fmr	583.34K	0.01%	-874.38K
Two sigma advisers, lp	-	-	-724.40K

New Positions

Holder	Shares	% Assets	Change	Value
Dodge & cox	3.46M	0.67%	3.46M	$1.24B
Norges bank	3.28M	0.12%	3.28M	$1.16B
Viking global investors lp	1.41M	1.31%	1.41M	$504.42M
Strive asset management	400.99K	0.02%	400.99K	$35.30M
Point72 asset management	182.05K	0.11%	182.05K	$64.92M

Sold Out

Holder	Change
Parallax volatility advisers	-1.00
Breakwater investment management	-1.00
1620 investment advisors	-2.00
Sugar maple asset management	-2.00
Continuum advisory	-2.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	589	-53.59%	41,655,262	-77.55%	19	0.26%	257	-56.95%	203	-49.75%
Sep 30, 2025	709	-43.42%	60,661,564	-68.68%	28	0.35%	328	-38.23%	216	-54.43%
Jun 30, 2025	1,235	-4.78%	193,497,392	1.13%	89	1.15%	525	-16.67%	471	18.94%
Mar 31, 2025	15	-98.77%	9,379,098	-95.10%	4	0.06%	7	-98.72%	2	-99.51%
Dec 31, 2024	1,172	-0.17%	191,156,351	1.25%	88	1.17%	522	-3.15%	400	7.82%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	6.54M	3.03%	-4.77K
Vanguard Total Stock Mkt Idx Inv	6.43M	3.00%	13.68K
Vanguard Institutional 500 Index Trust	6.15M	2.85%	44.02K
Vanguard 500 Index Investor	5.48M	2.56%	34.34K
Dodge & Cox Stock I	3.68M	1.72%	1.89M
American Funds American Balanced A	3.11M	1.45%	-
iShares Core S&P 500 ETF	2.74M	1.28%	657.30K
MFS Large Cap Value Equity	2.73M	1.27%	-111.48K
Fidelity 500 Index	2.72M	1.27%	-5.00K
MFS Value A	2.69M	1.25%	-3.10M

Recent Insider Transactions

Date	Name	Role	Activity	Value
Feb 26, 2026	Zeidel Darren	General Counsel	Sell	$1.42M
Feb 17, 2026	Zeidel Darren	General Counsel	Sell	$1.64M
Feb 10, 2026	KNIGHT LESTER B	-	Buy	$1.28M
Nov 05, 2025	Zeidel Darren	General Counsel	Sell	$2.61M
Nov 05, 2025	Zeidel Darren	General Counsel	Sell	$424.56K

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	1	2
2025 Q1	-	-
2024 Q4	-	2
2024 Q3	1	3
2024 Q2	6	-

AON Ownership FAQ

Who Owns Aon?

Aon shareholders are primarily institutional investors at 19.37%, followed by 3.05% insiders and 77.58% retail investors. The average institutional ownership in Aon's industry, Insurance Brokers Stocks, is 23.76%, which Aon falls below.

Who owns the most shares of Aon?

Aon’s largest shareholders are Vanguard group (20.17M shares, 9.38%), Blackrock (15.27M shares, 7.67%), and Blackrock funding, inc. /de (16.24M shares, 7.55%). Together, they hold 24.59% of Aon’s total shares outstanding.

Does Blackrock own Aon?

Yes, BlackRock owns 7.67% of Aon, totaling 15.27M shares as of Jun 2024. This represents 0.10% of BlackRock's total assets, with a market value of 4.48B$. In the last quarter, BlackRock increased its holdings by 781.42K shares, a 5.39% change.

Who is Aon’s biggest shareholder by percentage of total assets invested?

Hps investment partners is Aon’s biggest shareholder by percentage of total assets invested, with 99.01% of its assets in 4.34M Aon shares, valued at 1.73B$.

Who is the top mutual fund holder of Aon shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Aon shares, with 3.03% of its total shares outstanding invested in 6.54M Aon shares.

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