Is AJG or AON cheaper?

On trailing earnings, AON is cheaper: AJG trades at a 41.46 P/E and AON at 19.62.

Which has grown faster, AJG or AON?

Over the past five years, AJG grew revenue faster — AJG at a 15.44% CAGR versus AON at 8.99%.

Does AJG or AON pay a bigger dividend?

AJG yields 1.09% and AON yields 0.92% based on trailing dividends and the latest price.

Is AJG or AON more profitable?

AON runs the higher net margin — AJG at 10.76% versus AON at 22.54%.

Which has been the better investment, AJG or AON?

Over the past 10-year, AJG delivered the higher annualized total return — AJG at 20.00% versus AON at 13.61%. Past performance doesn't predict future results.

Arthur J. Gallagher & Co. (AJG) vs Aon plc (AON)

AON leads on 8 of 13 compared metrics.

A side-by-side comparison of Arthur J. Gallagher & Co. and Aon plc across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of July 9, 2026. The ● marks the stronger figure on each row (cheaper multiple, higher margin/return).

AJG

Arthur J. Gallagher & Co.

$65.20B

$253.76Financial Services

AON

Aon plc

$75.94B

$355.56Financial Services

Total return — AJG vs AON

growth of $100 · last 30y

AJG +3131.9%AON +1509.0%AJG compounded faster

AJG AON

AJG vs AON: by the numbers

•AON is the larger company ($75.94B vs $65.20B market cap).
•AON trades at the lower earnings multiple (19.62 vs 41.46 P/E).
•AON converts more revenue to profit (22.54% vs 10.76% net margin).
•AJG grew revenue faster over the past five years (15.44% vs 8.99% CAGR).
•AJG pays the higher dividend yield (1.09% vs 0.92%).

Which is better, AJG or AON?

Metric tally: AJG 5 · AON 8

It depends on what you're optimizing for:

ValueAON(lower P/E)

GrowthAJG(faster 5Y revenue CAGR)

IncomeAJG(higher dividend yield)

QualityAON(higher ROIC)

Metrics side by side

Valuation

Metric	AJG	AON
P/E ratio	41.46	19.62●
Forward P/E	19.39	18.68●
P/S ratio	4.45	4.40
P/B ratio	2.80●	7.83
PEG ratio	6.55	0.56●

Profitability

Metric	AJG	AON
Gross margin	54.75%●	47.70%
Operating margin	18.17%	27.56%●
Net margin	10.76%	22.54%●
ROE	6.78%	40.09%●
ROIC	5.25%	12.16%●

Dividends

Metric	AJG	AON
Dividend yield	1.09%●	0.92%
Payout ratio	48.03%	19.15%

Growth (annualized)

Metric	AJG	AON
Revenue CAGR (5Y)	15.44%●	8.99%
EPS CAGR (5Y)	6.33%	15.07%●
Total return CAGR (5Y)	14.26%●	9.61%

Frequently asked

Which is better, AJG or AON?: It depends on your goal. value: AON (lower P/E); growth: AJG (faster 5Y revenue CAGR); income: AJG (higher dividend yield); quality: AON (higher ROIC). Across all compared metrics, AON leads 8 to 5.
Is AJG or AON cheaper?: On trailing earnings, AON is cheaper: AJG trades at a 41.46 P/E and AON at 19.62.
Which has grown faster, AJG or AON?: Over the past five years, AJG grew revenue faster — AJG at a 15.44% CAGR versus AON at 8.99%.
Does AJG or AON pay a bigger dividend?: AJG yields 1.09% and AON yields 0.92% based on trailing dividends and the latest price.
Is AJG or AON more profitable?: AON runs the higher net margin — AJG at 10.76% versus AON at 22.54%.
Which has been the better investment, AJG or AON?: Over the past 10-year, AJG delivered the higher annualized total return — AJG at 20.00% versus AON at 13.61%. Past performance doesn't predict future results.

Go deeper

Full AJG analysis Full AON analysis Interactive comparison tool

Dig into the metrics

Arthur J. Gallagher & P/E ratio Aon P/E ratio Arthur J. Gallagher & dividend yield Aon dividend yield Arthur J. Gallagher & ROE Aon ROE Arthur J. Gallagher & operating margin Aon operating margin Arthur J. Gallagher & revenue growth Aon revenue growth Arthur J. Gallagher & free cash flow Aon free cash flow

Arthur J. Gallagher & & Aon appear in these rankings

Fastest Revenue Growth Stocks Highest ROE Stocks Highest FCF Yield Stocks Best 10-Year Total Return Stocks

Figures are sourced from reported fundamentals and the latest end-of-day price. This comparison is informational only and is not investment advice. Past performance does not predict future results. See our methodology. Compiled by TGMCharts Research · data verified July 9, 2026.