MRSH vs AON Stock Comparison

Marsh & Mclennan Companies and Aon Prices as of Oct 23, 2026 Peers: Industry group
AON Aon plc
$303.56 +7.8% 1M -11.1% 1Y
Market cap
$64.14B
P/E
16.4x
Revenue (TTM)
$17.58B
Div. yield
0.01%
Insurance Brokers Financial Services
6 wins

Head to Head

12 decided of 12

Marsh & Mclennan Companies leads on 6 of the 12 questions below (Marsh & Mclennan Companies 6, Aon 6). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionMRSHAONLeader
Larger companyMarket capitalisation $92.30B $64.14B MRSH
Cheaper on earningsLower P/E, profitable companies only 22.8x 16.4x AON
Cheaper on forward earningsLower price / next fiscal year consensus EPS 19.4x 16.7x AON
Faster revenue growthRevenue growth, trailing twelve months +7.6% +4.9% MRSH
More profitableNet margin, trailing twelve months 14.2% 22.3% AON
Better return on capitalReturn on invested capital 13.1% 14.8% AON
Less leveragedLower net debt / EBITDA 2.7x 2.5x AON
Higher dividend yieldTrailing dividend yield 0.02% 0.01% MRSH
Better 1-year returnPrice return, last 12 months +5.0% -11.1% MRSH
Better 5-year returnAnnualised price return, 5 years +3.1%/yr -1.1%/yr MRSH
Less volatileAnnualised volatility, 1 year 25.8% 29.2% MRSH
Higher overall scoreMean of the five percentile scores vs peers 35/100 41/100 AON

Percentile Scorecard

MRSHAON

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisMRSHAON
Valuation 9 #108 of 119 11 #106 of 119
Growth 16 #99 of 117 47 #63 of 117
Profitability 77 #28 of 117 87 #16 of 117
Financial Health 21 #94 of 118 7 #110 of 118
Shareholder Returns 55 #49 of 108 53 #51 of 108
Overall 35 41
  • MRSH ranked among 126 companies in Insurance
  • AON ranked among 126 companies in Insurance

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodMRSHAONSPY
1 month +15.9%+7.8% -1.0%
3 months +9.3%-16.1% +2.9%
6 months +16.1%-5.5% +6.4%
Year to date +6.5%-14.0% +11.4%
1 year +5.0%-11.1% +13.1%
3 years +4.5%-5.1% +79.4%
3 years, per year +1.5%-1.7% +21.5%
5 years +16.5%-5.4% +67.7%
5 years, per year +3.1%-1.1% +10.9%
10 years +203.7%+177.1% +255.2%
10 years, per year +11.8%+10.7% +13.5%

Risk

MeasureMRSHAONSPY
Volatility, 1Y 25.8%29.2% 12.7%
Downside volatility, 1Y 24.8%30.9% 12.7%
Beta vs S&P 500, 1Y -0.37-0.31 1.00
Return / volatility, 1Y 0.19-0.38 1.03
Max drawdown, 5Y -35.6%-34.2% -25.4%
From 52-week high -0.9%-20.3% -2.5%
52-week high $199.34$381.11 $779.14
52-week low $157.32$269.45 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleMRSHAON
P/E now vs peer median 23.3xmedian 10.5x 16.5xmedian 10.5x
P/S now vs peer median 3.3xmedian 1.4x 3.7xmedian 1.4x
EV/EBITDA now vs peer median 16.1xmedian 8.0x 14.1xmedian 8.0x
P/FCF now vs peer median 22.6xmedian 8.4x 19.8xmedian 8.4x
P/B now vs peer median 6.3xmedian 1.5x 6.6xmedian 1.5x
PEG now vs peer median 3.48median 0.47 1.36median 0.47

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsMRSHAON
Revenue $28.46B $17.58B
Operating income $6.09B $4.65B
Net income $4.12B $3.99B
Free cash flow $4.15B $3.25B
EPS (diluted) $8.44 $18.30
Cash & equivalents $1.84B $1.06B
Total debt $20.53B $63.71B
Shares (diluted) 479.00M 213.90M
Enterprise value $84.46B $57.35B

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricMRSHAON
P/E 23.3x 16.5x
P/FCF 22.6x 19.8x
P/Operating cash flow 21.0x 18.2x
P/S 3.3x 3.7x
P/B 6.3x 6.6x
P/Tangible book 9.0x 16.0x
EV/EBITDA 16.1x 14.1x
EV/EBIT 18.5x 16.8x
EV/Revenue 4.0x 4.4x
EV/FCF 27.1x 24.0x
EV/Operating cash flow 25.1x 22.1x
PEG (3Y EPS CAGR) 3.48 1.36

Growth

14 metrics
MetricMRSHAON
Revenue growth (1Y) 7.6% 4.9%
Revenue CAGR (3Y) 8.6% 10.9%
Gross profit growth (1Y) – –
Gross profit CAGR (3Y) – –
Operating income growth (1Y) -1.0% 15.4%
Operating income CAGR (3Y) 7.8% 5.9%
Net income growth (1Y) -1.9% 49.7%
Net income CAGR (3Y) 5.5% 13.4%
EPS growth (1Y) 1.0% 52.8%
EPS CAGR (3Y) 6.7% 12.2%
Operating cash flow growth (1Y) -12.1% 12.1%
Operating cash flow CAGR (3Y) 4.0% 3.1%
Free cash flow growth (1Y) -13.9% 11.5%
Free cash flow CAGR (3Y) 5.1% 3.3%

Profitability

14 metrics
MetricMRSHAON
Gross margin – –
EBITDA margin 24.6% 31.6%
Operating margin 21.4% 26.5%
Pretax margin 18.9% 28.9%
Net margin 14.2% 22.3%
FCF margin 14.6% 18.5%
Operating cash flow margin 15.7% 20.1%
Return on equity 27.2% 40.6%
Return on assets 6.9% 7.6%
Return on invested capital 13.1% 14.8%
Return on capital employed 16.2% 18.5%
Asset turnover 0.5x 0.3x
Cash conversion (OCF / net income) 1.1x 0.9x
Stock comp / revenue 1.5% 2.1%

Financial Health

11 metrics
MetricMRSHAON
Debt / assets 34.3% 28.1%
Debt / equity 1.4x 1.5x
Net debt / EBITDA 2.7x 2.5x
Debt / FCF 4.9x 4.6x
Liabilities / assets 75.1% 81.8%
Equity / assets 24.9% 18.2%
Interest coverage 6.3x 6.2x
Current ratio 1.1x 1.0x
Quick ratio 0.5x 0.3x
Cash ratio 0.1x 0.0x
Altman Z-score 2.79 1.52

Shareholder Returns

7 metrics
MetricMRSHAON
Dividend yield 1.9% 1.0%
Net buyback yield 3.1% 2.4%
Shareholder yield 5.0% 3.4%
Payout ratio (earnings) 43.6% 16.5%
Payout ratio (FCF) 43.3% 20.3%
Dividend growth (1Y) 8.4% 9.5%
Dividend CAGR (3Y) 13.1% 11.5%

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusMRSHAON
Forward P/E 19.4xFY2026 16.7xFY2026
EPS, next fiscal year $10.20FY2026 $18.15FY2026
EPS growth, next FY +4.6%FY2026 +6.3%FY2026
EPS growth, the year after +15.5% +8.1%
Revenue, next fiscal year $30.19BFY2026 $19.12BFY2026
Revenue growth, next FY +11.9%FY2026 +11.3%FY2026
Revenue growth, the year after +6.5% +8.7%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersMRSHAON
Held by institutions 93.9% 90.5%
Institutions holding 1,496 1,254
Change in shares held, QoQ +2.8% +3.1%
Institutions buying 624 603
Institutions selling 652 448
Buyers to sellers 0.96 1.35

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

MRSHAON
MRSH 1.00 0.80
AON 0.80 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, MRSH and AON?

Marsh & Mclennan Companies (MRSH) is the largest by market capitalisation: Marsh & Mclennan Companies (MRSH) $92.30B, Aon (AON) $64.14B.

Which stock is cheaper, MRSH and AON?

Aon (AON) trades on the lowest price-to-earnings ratio (Marsh & Mclennan Companies (MRSH) 22.8x, Aon (AON) 16.4x). On next year's consensus earnings, Aon (AON) is cheapest (Marsh & Mclennan Companies (MRSH) 19.4x, Aon (AON) 16.7x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Marsh & Mclennan Companies (MRSH) grew revenue fastest over the trailing twelve months: Marsh & Mclennan Companies (MRSH) +7.6%, Aon (AON) +4.9%.

Which company is more profitable?

Aon (AON) has the highest net margin (Marsh & Mclennan Companies (MRSH) 14.2%, Aon (AON) 22.3%). On return on invested capital, Aon (AON) leads (Marsh & Mclennan Companies (MRSH) 13.1%, Aon (AON) 14.8%).

Which stock has performed better?

Over the past year Marsh & Mclennan Companies (MRSH) returned the most: Marsh & Mclennan Companies (MRSH) +5.0%, Aon (AON) -11.1%. Over five years, Marsh & Mclennan Companies (MRSH) compounded fastest (Marsh & Mclennan Companies (MRSH) +3.1%/yr, Aon (AON) -1.1%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Marsh & Mclennan Companies (MRSH) has the highest dividend yield: Marsh & Mclennan Companies (MRSH) 0.02%, Aon (AON) 0.01%.

Which stock is riskier?

By one-year price volatility, Marsh & Mclennan Companies (MRSH) has been the steadiest (Marsh & Mclennan Companies (MRSH) 25.8%, Aon (AON) 29.2%). Volatility measures how widely the price swings, not the risk of the business.

Do MRSH and AON move together?

Their daily returns over the past year have a correlation of 0.80, a strong positive relationship. Holding both adds little diversification.

Which is the better stock, MRSH and AON?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Marsh & Mclennan Companies (MRSH) leads on 6. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.