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AJG vs AON stock comparison

Compare Arthur J. Gallagher & Co. Common Stock (AJG) vs Aon plc Class A Ordinary Shares (Ireland) (AON) with a normalized 1-year performance chart. AJG -16.7% versus AON +5.1%.

AJG return
-16.7%
AON return
+5.1%
Spread
-21.8%
Data window
Jul 2025 to Jul 2026

Normalized performance chart

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AJG versus AON comparison chart

Company pair

AJG

Arthur J. Gallagher & Co. Common Stock

AON

Aon plc Class A Ordinary Shares (Ireland)