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Main Street Research’s Aon AON Stock Holding History

Main Street Research’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
Q2 		$208K Buy
628
+6
+1% +$1.94K 0.01% 136
2026
Q1 		$201K Sell
622
-199
-24% -$66.1K 0.01% 146
2025
Q4 		$290K Buy
821
+194
+31% +$67.7K 0.02% 104
2025
Q3 		$224K Buy
627
+7
+1% +$2.53K 0.01% 122
2025
Q2 		$221K Sell
620
-2
-0.3% -$725 0.01% 109
2025
Q1 		$248K Sell
622
-98
-14% -$37.6K 0.02% 95
2024
Q4 		$259K Hold
720
– – 0.02% 97
2024
Q3 		$249K Hold
720
– – 0.02% 96
2024
Q2 		$211K Sell
720
-100
-12% -$29.6K 0.01% 96
2024
Q1 		$274K Sell
820
-202
-20% -$62.6K 0.02% 86
2023
Q4 		$297K Sell
1,022
-65,113
-98% -$20.8M 0.02% 82
2023
Q3 		$21.4M Buy
66,135
+30,257
+84% +$10M 2.21% 22
2023
Q2 		$12.4M Sell
35,878
-1,006
-3% -$327K 1.97% 22
2023
Q1 		$11.6M Buy
36,884
+36,174
+5,095% +$11.2M 2.3% 17
2022
Q4 		$213K Buy
+710
New +$207K 0.05% 92
2022
Q2 		– Sell
-710
Closed -$231K – 87
2022
Q1 		$231K Sell
710
-35
-5% -$10.2K 0.02% 110
2021
Q4 		$224K Sell
745
-65
-8% -$19.5K 0.02% 131
2021
Q3 		$231K Buy
+810
New +$218K 0.02% 125
2015
Q2 		– Sell
-2,290
Closed -$220K – 135
2015
Q1 		$220K Buy
+2,290
New +$222K 0.05% 130

Other funds holding AON

CGI
Comgest Global Investors Paris, France $4.55B AUM 11.62% 1-Year Est. Return
PAM
PineStone Asset Management Montreal, Quebec, Canada $16.2B AUM 25.74% 1-Year Est. Return
Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
DC
Davenport & Co Richmond, Virginia $20.4B AUM 18.11% 1-Year Est. Return
CS
CapitalatWork SA Auderghem $3.99B AUM
New York State Common Retirement Fund
New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return
SI
Scharf Investments Los Gatos, California $3.03B AUM 7.75% 1-Year Est. Return
Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return
Ninety One (UK)
Ninety One (UK) London, United Kingdom $44.7B AUM 17.24% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $54.2B AUM 43.77% 1-Year Est. Return

Main Street Research's AON Position: Q2 2026 in Review

Main Street Research increased its Aon (AON) stake by 0.96% in Q2 2026, buying an estimated $1.94K and bringing the position to 628 shares worth $208K. The position accounts for 0.01% of the portfolio, ranked #136.

Main Street Research first reported a position in AON in Q1 2015 and has held it in 19 quarters since. The position peaked at $21.4M in Q3 2023. 465 funds tracked by Wall St. Rank hold AON as of Q2 2026.

  • Main Street Research held 628 shares of Aon worth $208K as of Q2 2026.
  • Main Street Research bought 6 Aon shares in Q2 2026, an estimated $1.94K.
  • Aon made up 0.01% of Main Street Research's portfolio in Q2 2026, its #136 holding.
  • Main Street Research first reported a position in Aon in Q1 2015 and has held it in 19 quarters since.
  • Main Street Research's Aon position peaked at $21.4M in Q3 2023.
  • 465 funds tracked by Wall St. Rank held Aon as of Q2 2026.

Based on Main Street Research's 13F filing for Q2 2026, filed 29 Jul 2026.