Mesirow Financial Investment Management’s Aon AON Stock Holding History

Mesirow Financial Investment Management’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	$1.61M	Sell	4,859 -38	-0.8%	-$12.3K	0.03%	228
2026 Q1	$1.58M	Buy	4,897 +6	+0.1%	+$1.99K	0.03%	218
2025 Q4	$1.73M	Sell	4,891 -755	-13%	-$264K	0.04%	196
2025 Q3	$2.01M	Sell	5,646 -53	-0.9%	-$19.2K	0.04%	198
2025 Q2	$2.03M	Sell	5,699 -110	-2%	-$39.9K	0.04%	189
2025 Q1	$2.32M	Buy	5,809 +114	+2%	+$43.7K	0.04%	183
2024 Q4	$2.05M	Sell	5,695 -308	-5%	-$113K	0.04%	188
2024 Q3	$2.08M	Buy	6,003 +2,311	+63%	+$756K	0.04%	195
2024 Q2	$1.08M	Sell	3,692 -656	-15%	-$194K	0.02%	237
2024 Q1	$1.45M	Sell	4,348 -849	-16%	-$263K	0.03%	214
2023 Q4	$1.51M	Buy	+5,197	New	+$1.66M	0.06%	182

Other funds holding AON

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

Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return

VAM

Veritas Asset Management London, United Kingdom $5.56B AUM 3.46% 1-Year Est. Return

Diamond Hill Capital Management Columbus, Ohio $12.5B AUM 7.49% 1-Year Est. Return

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

Vontobel Holding Zurich, Switzerland $31.4B AUM 31.97% 1-Year Est. Return

Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return

Russell Investments Group London, United Kingdom $114B AUM 41.71% 1-Year Est. Return

Mesirow Financial Investment Management's AON Position: Q2 2026 in Review

Mesirow Financial Investment Management reduced its Aon (AON) stake by 0.78% in Q2 2026, selling an estimated $12.3K and leaving 4,859 shares worth $1.61M. The position accounts for 0.03% of the portfolio, ranked #228.

Mesirow Financial Investment Management first reported a position in AON in Q4 2023 and has held it in 11 quarters since. The position peaked at $2.32M in Q1 2025. 658 funds tracked by Wall St. Rank hold AON as of Q2 2026.

Mesirow Financial Investment Management held 4,859 shares of Aon worth $1.61M as of Q2 2026.
Mesirow Financial Investment Management sold 38 Aon shares in Q2 2026, an estimated $12.3K.
Aon made up 0.03% of Mesirow Financial Investment Management's portfolio in Q2 2026, its #228 holding.
Mesirow Financial Investment Management first reported a position in Aon in Q4 2023 and has held it in 11 quarters since.
Mesirow Financial Investment Management's Aon position peaked at $2.32M in Q1 2025.
658 funds tracked by Wall St. Rank held Aon as of Q2 2026.

Based on Mesirow Financial Investment Management's 13F filing for Q2 2026, filed 22 Jul 2026.