Is AON or MCO cheaper?

On trailing earnings, AON is cheaper: AON trades at a 18.40 P/E and MCO at 32.13.

Which has grown faster, AON or MCO?

Over the past five years, AON grew revenue faster — AON at a 8.99% CAGR versus MCO at 6.74%.

Does AON or MCO pay a bigger dividend?

AON yields 0.91% and MCO yields 0.88% based on trailing dividends and the latest price.

Is AON or MCO more profitable?

MCO runs the higher net margin — AON at 22.54% versus MCO at 31.69%.

Which has been the better investment, AON or MCO?

Over the past 10-year, MCO delivered the higher annualized total return — AON at 12.90% versus MCO at 17.34%. Past performance doesn't predict future results.

Aon plc (AON) vs Moody's Corporation (MCO)

AON leads on 11 of 17 compared metrics.

A side-by-side comparison of Aon plc and Moody's Corporation across valuation, profitability, dividends, and growth — built entirely from reported fundamentals, as of June 13, 2026. The ● marks the stronger figure on each row (cheaper multiple, higher margin/return).

AON

Aon plc

$71.61B

$335.31Financial Services

MCO

Moody's Corporation

$78.24B

$447.85Financial Services

Total return — AON vs MCO

growth of $100 · last 30y

AON +1401.6%MCO +4843.2%MCO compounded faster

AON MCO

AON vs MCO: by the numbers

•MCO is the larger company ($78.24B vs $71.61B market cap).
•AON trades at the lower earnings multiple (18.40 vs 32.13 P/E).
•MCO converts more revenue to profit (31.69% vs 22.54% net margin).
•AON grew revenue faster over the past five years (8.99% vs 6.74% CAGR).
•AON pays the higher dividend yield (0.91% vs 0.88%).

Which is better, AON or MCO?

Metric tally: AON 11 · MCO 6

It depends on what you're optimizing for:

ValueAON(lower P/E)

GrowthAON(faster 5Y revenue CAGR)

IncomeAON(higher dividend yield)

QualityMCO(higher ROIC)

Valuation

Metric	AON	MCO
P/E ratio	18.40●	32.13
Forward P/E	17.51●	24.02
P/S ratio	4.13●	10.09
P/B ratio	7.34●	26.52
PEG ratio	0.56●	1.75
EV / EBITDA	12.76●	21.58
FCF yield	4.84%●	3.77%

Profitability

Metric	AON	MCO
Gross margin	65.98%	69.69%●
Operating margin	27.56%	44.16%●
Net margin	22.54%	31.69%●
ROE	40.09%	83.33%●
ROIC	12.16%	21.00%●

Dividends

Metric	AON	MCO
Dividend yield	0.91%●	0.88%
Payout ratio	17.83%	28.70%

Growth (annualized)

Metric	AON	MCO
Revenue CAGR (5Y)	8.99%●	6.74%
EPS CAGR (5Y)	15.07%●	7.69%
FCF CAGR (5Y)	3.85%	4.68%●
Total return CAGR (5Y)	6.89%●	6.26%

Frequently asked

Which is better, AON or MCO?: It depends on your goal. value: AON (lower P/E); growth: AON (faster 5Y revenue CAGR); income: AON (higher dividend yield); quality: MCO (higher ROIC). Across all compared metrics, AON leads 11 to 6.
Is AON or MCO cheaper?: On trailing earnings, AON is cheaper: AON trades at a 18.40 P/E and MCO at 32.13.
Which has grown faster, AON or MCO?: Over the past five years, AON grew revenue faster — AON at a 8.99% CAGR versus MCO at 6.74%.
Does AON or MCO pay a bigger dividend?: AON yields 0.91% and MCO yields 0.88% based on trailing dividends and the latest price.
Is AON or MCO more profitable?: MCO runs the higher net margin — AON at 22.54% versus MCO at 31.69%.
Which has been the better investment, AON or MCO?: Over the past 10-year, MCO delivered the higher annualized total return — AON at 12.90% versus MCO at 17.34%. Past performance doesn't predict future results.

Go deeper

Full AON analysis Full MCO analysis Interactive comparison tool

Dig into the metrics

Aon P/E ratio Moody's P/E ratio Aon dividend yield Moody's dividend yield Aon ROE Moody's ROE Aon operating margin Moody's operating margin Aon revenue growth Moody's revenue growth Aon free cash flow Moody's free cash flow

Aon & Moody's appear in these rankings

Highest ROE Stocks Highest ROIC Stocks Highest Operating Margin Stocks Highest FCF Yield 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 June 13, 2026.