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 New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return

Dodge & Cox San Francisco, California $191B AUM 17.5% 1-Year Est. Return

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Berkshire Hathaway's AON Position: Q1 2026 in Review

Berkshire Hathaway sold out of Aon (AON) in Q1 2026, closing a stake of 3,602,995 shares — an estimated $1.27B sold.

Berkshire Hathaway first reported a position in AON in Q1 2021 and held it in 20 quarters. The position peaked at $1.64B in Q1 2025. 1,259 funds tracked by Wall St. Rank hold AON as of Q1 2026.

Berkshire Hathaway reported no remaining Aon position as of Q1 2026 after selling out during the quarter.
Berkshire Hathaway sold 3,602,995 Aon shares in Q1 2026, an estimated $1.27B.
Berkshire Hathaway first reported a position in Aon in Q1 2021 and held it in 20 quarters.
Berkshire Hathaway's Aon position peaked at $1.64B in Q1 2025.
1,259 funds tracked by Wall St. Rank held Aon as of Q1 2026.

Based on Berkshire Hathaway's 13F filing for Q1 2026, filed 15 May 2026.