AJG vs AON vs MRSH Stock Comparison

Arthur J. Gallagher, Aon and Marsh & Mclennan Companies Prices as of Oct 23, 2026 Peers: Industry group
AJG Arthur J. Gallagher & Co.
$268.07 +16.8% 1M -5.1% 1Y
Market cap
$68.41B
P/E
43.6x
Revenue (TTM)
$15.75B
Div. yield
0.01%
Insurance Brokers Financial Services
2 wins
AON Aon plc
$303.56 +7.8% 1M -11.1% 1Y
Market cap
$64.41B
P/E
16.5x
Revenue (TTM)
$17.58B
Div. yield
0.01%
Insurance Brokers Financial Services
6 wins

Head to Head

12 decided of 12

Aon leads on 6 of the 12 questions below (Aon 6, Marsh & Mclennan Companies 4, Arthur J. Gallagher 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionAJGAONMRSHLeader
Larger companyMarket capitalisation $68.41B $64.41B $92.63B MRSH
Cheaper on earningsLower P/E, profitable companies only 43.6x 16.5x 22.9x AON
Cheaper on forward earningsLower price / next fiscal year consensus EPS 19.5x 16.7x 19.4x AON
Faster revenue growthRevenue growth, trailing twelve months +26.3% +4.9% +7.6% AJG
More profitableNet margin, trailing twelve months 10.0% 22.3% 14.2% AON
Better return on capitalReturn on invested capital 5.7% 14.8% 13.1% AON
Less leveragedLower net debt / EBITDA 3.0x 2.5x 2.7x AON
Higher dividend yieldTrailing dividend yield 0.01% 0.01% 0.02% MRSH
Better 1-year returnPrice return, last 12 months -5.1% -11.1% +5.0% MRSH
Better 5-year returnAnnualised price return, 5 years +10.2%/yr -1.1%/yr +3.1%/yr AJG
Less volatileAnnualised volatility, 1 year 32.6% 29.2% 25.8% MRSH
Higher overall scoreMean of the five percentile scores vs peers 25/100 41/100 35/100 AON

Percentile Scorecard

AJGAONMRSH

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

AxisAJGAONMRSH
Valuation 5 #113 of 119 11 #106 of 119 9 #108 of 119
Growth 47 #62 of 117 47 #63 of 117 16 #99 of 117
Profitability 35 #77 of 117 87 #16 of 117 77 #28 of 117
Financial Health 10 #106 of 118 7 #110 of 118 21 #94 of 118
Shareholder Returns 27 #79 of 108 53 #51 of 108 55 #49 of 108
Overall 25 41 35
  • AJG ranked among 126 companies in Insurance
  • AON ranked among 126 companies in Insurance
  • MRSH ranked among 126 companies in Insurance

Price Performance

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

Returns

PeriodAJGAONMRSHSPY
1 month +16.8%+7.8%+15.9% -1.0%
3 months +8.2%-16.1%+9.3% +2.9%
6 months +24.5%-5.5%+16.1% +6.4%
Year to date +3.6%-14.0%+6.5% +11.4%
1 year -5.1%-11.1%+5.0% +13.1%
3 years +15.9%-5.1%+4.5% +79.4%
3 years, per year +5.1%-1.7%+1.5% +21.5%
5 years +62.3%-5.4%+16.5% +67.7%
5 years, per year +10.2%-1.1%+3.1% +10.9%
10 years +447.4%+177.1%+203.7% +255.2%
10 years, per year +18.5%+10.7%+11.8% +13.5%

Risk

MeasureAJGAONMRSHSPY
Volatility, 1Y 32.6%29.2%25.8% 12.7%
Downside volatility, 1Y 32.9%30.9%24.8% 12.7%
Beta vs S&P 500, 1Y -0.38-0.31-0.37 1.00
Return / volatility, 1Y -0.16-0.380.19 1.03
Max drawdown, 5Y -44.9%-34.2%-35.6% -25.4%
From 52-week high -5.1%-20.3%-0.9% -2.5%
52-week high $282.49$381.11$199.34 $779.14
52-week low $192.00$269.45$157.32 $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.

MultipleAJGAONMRSH
P/E now vs peer median 43.8xmedian 10.5x 16.5xmedian 10.5x 23.3xmedian 10.5x
P/S now vs peer median 4.4xmedian 1.4x 3.7xmedian 1.4x 3.3xmedian 1.4x
EV/EBITDA now vs peer median 20.3xmedian 8.0x 14.1xmedian 8.0x 16.1xmedian 8.0x
P/FCF now vs peer median 30.1xmedian 8.4x 19.8xmedian 8.4x 22.6xmedian 8.4x
P/B now vs peer median 2.9xmedian 1.5x 6.6xmedian 1.5x 6.3xmedian 1.5x
PEG now vs peer median 7.17median 0.47 1.36median 0.47 3.48median 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 monthsAJGAONMRSH
Revenue $15.75B $17.58B $28.46B
Operating income – $4.65B $6.09B
Net income $1.57B $3.99B $4.12B
Free cash flow $2.29B $3.25B $4.15B
EPS (diluted) $6.07 $18.30 $8.44
Cash & equivalents $1.39B $1.06B $1.84B
Total debt $27.42B $63.71B $20.53B
Shares (diluted) 258.70M 213.90M 479.00M
Enterprise value $62.81B $57.63B $84.79B

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
MetricAJGAONMRSH
P/E 43.8x 16.5x 23.3x
P/FCF 30.1x 19.8x 22.6x
P/Operating cash flow 28.1x 18.2x 21.0x
P/S 4.4x 3.7x 3.3x
P/B 2.9x 6.6x 6.3x
P/Tangible book 5.1x 16.0x 9.0x
EV/EBITDA 20.3x 14.1x 16.1x
EV/EBIT 30.7x 16.8x 18.5x
EV/Revenue 5.1x 4.4x 4.0x
EV/FCF 35.4x 24.0x 27.1x
EV/Operating cash flow 33.0x 22.1x 25.1x
PEG (3Y EPS CAGR) 7.17 1.36 3.48

Growth

14 metrics
MetricAJGAONMRSH
Revenue growth (1Y) 26.3% 4.9% 7.6%
Revenue CAGR (3Y) 19.6% 10.9% 8.6%
Gross profit growth (1Y) – – –
Gross profit CAGR (3Y) – – –
Operating income growth (1Y) – 15.4% -1.0%
Operating income CAGR (3Y) – 5.9% 7.8%
Net income growth (1Y) -4.5% 49.7% -1.9%
Net income CAGR (3Y) 12.2% 13.4% 5.5%
EPS growth (1Y) -3.8% 52.8% 1.0%
EPS CAGR (3Y) 6.1% 12.2% 6.7%
Operating cash flow growth (1Y) 15.4% 12.1% -12.1%
Operating cash flow CAGR (3Y) 13.2% 3.1% 4.0%
Free cash flow growth (1Y) 15.8% 11.5% -13.9%
Free cash flow CAGR (3Y) 14.8% 3.3% 5.1%

Profitability

14 metrics
MetricAJGAONMRSH
Gross margin – – –
EBITDA margin 25.2% 31.6% 24.6%
Operating margin – 26.5% 21.4%
Pretax margin 12.6% 28.9% 18.9%
Net margin 10.0% 22.3% 14.2%
FCF margin 14.5% 18.5% 14.6%
Operating cash flow margin 15.5% 20.1% 15.7%
Return on equity 6.6% 40.6% 27.2%
Return on assets 2.0% 7.6% 6.9%
Return on invested capital 5.7% 14.8% 13.1%
Return on capital employed 7.1% 18.5% 16.2%
Asset turnover 0.2x 0.3x 0.5x
Cash conversion (OCF / net income) 1.6x 0.9x 1.1x
Stock comp / revenue 1.0% 2.1% 1.5%

Financial Health

11 metrics
MetricAJGAONMRSH
Debt / assets 16.5% 28.1% 34.3%
Debt / equity 0.6x 1.5x 1.4x
Net debt / EBITDA 3.0x 2.5x 2.7x
Debt / FCF 5.9x 4.6x 4.9x
Liabilities / assets 71.0% 81.8% 75.1%
Equity / assets 29.0% 18.2% 24.9%
Interest coverage 4.1x 6.2x 6.3x
Current ratio 1.1x 1.0x 1.1x
Quick ratio 0.2x 0.3x 0.5x
Cash ratio 0.0x 0.0x 0.1x
Altman Z-score 1.15 1.52 2.79

Shareholder Returns

7 metrics
MetricAJGAONMRSH
Dividend yield 1.0% 1.0% 1.9%
Net buyback yield 0.4% 2.4% 3.1%
Shareholder yield 1.4% 3.4% 5.0%
Payout ratio (earnings) 44.0% 16.5% 43.6%
Payout ratio (FCF) 30.3% 20.3% 43.3%
Dividend growth (1Y) 16.3% 9.5% 8.4%
Dividend CAGR (3Y) 15.4% 11.5% 13.1%

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.

ConsensusAJGAONMRSH
Forward P/E 19.5xFY2026 16.7xFY2026 19.4xFY2026
EPS, next fiscal year $13.76FY2026 $18.15FY2026 $10.20FY2026
EPS growth, next FY +28.7%FY2026 +6.3%FY2026 +4.6%FY2026
EPS growth, the year after +13.3% +8.1% +15.5%
Revenue, next fiscal year $17.07BFY2026 $19.12BFY2026 $30.19BFY2026
Revenue growth, next FY +23.9%FY2026 +11.3%FY2026 +11.9%FY2026
Revenue growth, the year after +0.7% +8.7% +6.5%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersAJGAONMRSH
Held by institutions 93.0% 90.5% 93.9%
Institutions holding 1,290 1,254 1,496
Change in shares held, QoQ +4.0% +3.1% +2.8%
Institutions buying 621 603 624
Institutions selling 483 448 652
Buyers to sellers 1.29 1.35 0.96

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.

AJGAONMRSH
AJG 1.00 0.76 0.81
AON 0.76 1.00 0.80
MRSH 0.81 0.80 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, AJG, AON and MRSH?

Marsh & Mclennan Companies (MRSH) is the largest by market capitalisation: Arthur J. Gallagher (AJG) $68.41B, Aon (AON) $64.41B, Marsh & Mclennan Companies (MRSH) $92.63B.

Which stock is cheaper, AJG, AON and MRSH?

Aon (AON) trades on the lowest price-to-earnings ratio (Arthur J. Gallagher (AJG) 43.6x, Aon (AON) 16.5x, Marsh & Mclennan Companies (MRSH) 22.9x). On next year's consensus earnings, Aon (AON) is cheapest (Arthur J. Gallagher (AJG) 19.5x, Aon (AON) 16.7x, Marsh & Mclennan Companies (MRSH) 19.4x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Arthur J. Gallagher (AJG) grew revenue fastest over the trailing twelve months: Arthur J. Gallagher (AJG) +26.3%, Aon (AON) +4.9%, Marsh & Mclennan Companies (MRSH) +7.6%.

Which company is more profitable?

Aon (AON) has the highest net margin (Arthur J. Gallagher (AJG) 10.0%, Aon (AON) 22.3%, Marsh & Mclennan Companies (MRSH) 14.2%). On return on invested capital, Aon (AON) leads (Arthur J. Gallagher (AJG) 5.7%, Aon (AON) 14.8%, Marsh & Mclennan Companies (MRSH) 13.1%).

Which stock has performed better?

Over the past year Marsh & Mclennan Companies (MRSH) returned the most: Arthur J. Gallagher (AJG) -5.1%, Aon (AON) -11.1%, Marsh & Mclennan Companies (MRSH) +5.0%. Over five years, Arthur J. Gallagher (AJG) compounded fastest (Arthur J. Gallagher (AJG) +10.2%/yr, Aon (AON) -1.1%/yr, Marsh & Mclennan Companies (MRSH) +3.1%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

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

Which stock is riskier?

By one-year price volatility, Marsh & Mclennan Companies (MRSH) has been the steadiest (Arthur J. Gallagher (AJG) 32.6%, Aon (AON) 29.2%, Marsh & Mclennan Companies (MRSH) 25.8%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, AJG, AON and MRSH?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Aon (AON) 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.