O'Brien Greene & Co’s Aon AON Stock Holding History

O'Brien Greene & Co’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	$366K	Hold	1,134	–	–	0.1%	105
2025 Q4	$400K	Hold	1,134	–	–	0.12%	100
2025 Q3	$404K	Sell	1,134 -17	-1%	-$6.15K	0.12%	97
2025 Q2	$411K	Hold	1,151	–	–	0.13%	87
2025 Q1	$459K	Hold	1,151	–	–	0.15%	82
2024 Q4	$413K	Buy	1,151 +17	+1%	+$6.25K	0.13%	92
2024 Q3	$392K	Sell	1,134 -17	-1%	-$5.56K	0.12%	97
2024 Q2	$338K	Buy	1,151 +17	+1%	+$5.03K	0.11%	106
2024 Q1	$378K	Hold	1,134	–	–	0.12%	98
2023 Q4	$330K	Hold	1,134	–	–	0.12%	99
2023 Q3	$368K	Hold	1,134	–	–	0.13%	93
2023 Q2	$392K	Hold	1,134	–	–	0.14%	91
2023 Q1	$358K	Hold	1,134	–	–	0.13%	99
2022 Q4	$340K	Sell	1,134 -2,319	-67%	-$678K	0.13%	104
2022 Q3	$925K	Buy	3,453 +2,426	+236%	+$686K	0.12%	107
2022 Q2	$277K	Hold	1,027	–	–	0.1%	117
2022 Q1	$335K	Hold	1,027	–	–	0.11%	112
2021 Q4	$308K	Buy	1,027 +17	+2%	+$5.1K	0.1%	116
2021 Q3	$289K	Hold	1,010	–	–	0.11%	115
2021 Q2	$241K	Hold	1,010	–	–	0.09%	125
2021 Q1	$232K	Hold	1,010	–	–	0.09%	120
2020 Q4	$214K	Hold	1,010	–	–	0.09%	110
2020 Q3	$208K	Buy	+1,010	New	+$202K	0.1%	98
2020 Q1	–	Sell	-1,010	Closed	-$210K	–	101
2019 Q4	$210K	Buy	+1,010	New	+$200K	0.11%	100

Other funds holding AON

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return

Dodge & Cox San Francisco, California $182B AUM 14.68% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

O'Brien Greene & Co's AON Position: Q1 2026 in Review

O'Brien Greene & Co held its Aon (AON) position steady in Q1 2026 at 1,134 shares worth $366K. The position accounts for 0.1% of the portfolio, ranked #105.

O'Brien Greene & Co first reported a position in AON in Q4 2019 and has held it in 24 quarters since. The position peaked at $925K in Q3 2022. 1,252 funds tracked by Wall St. Rank hold AON as of Q1 2026.

O'Brien Greene & Co held 1,134 shares of Aon worth $366K as of Q1 2026.
O'Brien Greene & Co left its Aon share count unchanged in Q1 2026.
Aon made up 0.1% of O'Brien Greene & Co's portfolio in Q1 2026, its #105 holding.
O'Brien Greene & Co first reported a position in Aon in Q4 2019 and has held it in 24 quarters since.
O'Brien Greene & Co's Aon position peaked at $925K in Q3 2022.
1,252 funds tracked by Wall St. Rank held Aon as of Q1 2026.

Based on O'Brien Greene & Co's 13F filing for Q1 2026, filed 6 May 2026.