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Read two to four stocks on the same scale — return, valuation and volatility in one table.

SelectedToday1Y Return

AONAon PLC− 1.46%− 2.81%
MRSHMarsh & McLennan Companies Inc− 0.92%− 9.12%
Partial Period · Sep 2, 2025 — Sep 4, 2026
AJGArthur J. Gallagher & Co.− 0.87%− 12.64%
Partial Period · Sep 2, 2025 — Sep 4, 2026

Period Return

Each series is converted to a percentage of its own starting point, so all of them begin at zero. What is compared is the return over the period, not price levels.

AON− 2.8%MRSH− 9.1%AJG− 12.6%Tap or hover the chart for values along the way

Metric	AONAon PLC	MRSHMarsh & McLennan Companies Inc	AJGArthur J. Gallagher & Co.
Return
Last Price	322.21	186.72	264.33
Daily Change	− 1.46%	− 0.92%	− 0.87%
Period ReturnPast Year	− 2.81%	− 9.12%Sep 2, 2025 — Sep 4, 2026	− 12.64%Sep 2, 2025 — Sep 4, 2026
Valuation
Market Cap	$68.4 B	$89.1 B	$68.6 B
P/E Ratio	17.77	22.86	43.70
Dividend Yield	0.75%	—	0.87%
Net MarginTrailing 12M	22.3%	14.2%	10.0%
Risk
Beta	0.64	0.55	0.49
52-Week Range	304.59 — $382.34	156.60 — $207.83	190.75 — $313.55
Company
Sector	Financials	Financials	Financials
Industry	Insurance	Insurance	Insurance

Company

AONFinancials · Insurance
MRSHFinancials · Insurance
AJGFinancials · Insurance

FinnhubUpdated 21:54

To Understand This

P/E and the Valuation RatiosYou can't tell whether a stock is cheap or expensive by looking at its price.Diversification: How Many Baskets Are Enough?Owning ten different stocks is not the same as owning ten different risks.