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AON vs MRSH stock comparison

Compare Aon plc Class A Ordinary Shares (Ireland) (AON) vs Marsh Common Stock (MRSH) with a normalized 1-year performance chart. AON +4.8% versus MRSH -1.8%.

AON return
+4.8%
MRSH return
-1.8%
Spread
+6.6%
Data window
Jan 2026 to Jul 2026

Normalized performance chart

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AON versus MRSH comparison chart

Company pair

AON

Aon plc Class A Ordinary Shares (Ireland)

MRSH

Marsh Common Stock

Data notes

  • 116 dates were skipped because one series was missing or non-positive.