Berkshire Hathaway
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Berkshire Hathaway’s Aon AON Stock Holding History

Berkshire Hathaway’s Portfolio AON Stock Details AON Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-3,602,995
Closed -$1.27B – 32
2025
Q4 		$1.27B Sell
3,602,995
-497,005
-12% -$174M 0.46% 22
2025
Q3 		$1.46B Hold
4,100,000
– – 0.55% 21
2025
Q2 		$1.46B Hold
4,100,000
– – 0.57% 20
2025
Q1 		$1.64B Hold
4,100,000
– – 0.63% 18
2024
Q4 		$1.47B Hold
4,100,000
– – 0.55% 17
2024
Q3 		$1.42B Hold
4,100,000
– – 0.53% 18
2024
Q2 		$1.2B Hold
4,100,000
– – 0.43% 20
2024
Q1 		$1.37B Hold
4,100,000
– – 0.41% 19
2023
Q4 		$1.19B Hold
4,100,000
– – 0.34% 21
2023
Q3 		$1.33B Sell
4,100,000
-235,000
-5% -$77.8M 0.42% 18
2023
Q2 		$1.5B Hold
4,335,000
– – 0.43% 16
2023
Q1 		$1.37B Sell
4,335,000
-61,000
-1% -$18.9M 0.42% 20
2022
Q4 		$1.32B Hold
4,396,000
– – 0.44% 20
2022
Q3 		$1.18B Hold
4,396,000
– – 0.4% 23
2022
Q2 		$1.19B Hold
4,396,000
– – 0.4% 23
2022
Q1 		$1.43B Hold
4,396,000
– – 0.39% 23
2021
Q4 		$1.32B Hold
4,396,000
– – 0.4% 21
2021
Q3 		$1.26B Hold
4,396,000
– – 0.43% 23
2021
Q2 		$1.05B Buy
4,396,000
+299,854
+7% +$73.3M 0.36% 24
2021
Q1 		$943M Buy
+4,096,146
New +$902M 0.35% 25

Other funds holding AON

BlackRock
BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
Dodge & Cox
Dodge & Cox San Francisco, California $182B AUM 14.68% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.47T AUM 27.86% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM