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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 -13.7% versus AON -2.1%.

AJG return
-13.7%
AON return
-2.1%
Spread
-11.6%
Data window
Aug 2025 to Aug 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)