AON vs WTW vs MRSH Stock Comparison

Aon, Willis Towers Watson and Marsh & Mclennan Companies Prices as of Oct 27, 2026 Peers: Industry group
AON Aon plc
$302.39 +8.8% 1M -10.2% 1Y
Market cap
$67.78B
P/E
17.3x
Revenue (TTM)
$17.58B
Div. yield
0.01%
Insurance Brokers Financial Services
3 wins
WTW Willis Towers Watson Plc
$319.66 +8.7% 1M -2.2% 1Y
Market cap
$30.19B
P/E
19.3x
Revenue (TTM)
$10.10B
Div. yield
0.01%
Insurance Brokers Financial Services
4 wins

Head to Head

12 decided of 12

Marsh & Mclennan Companies leads on 5 of the 12 questions below (Marsh & Mclennan Companies 5, Willis Towers Watson 4, Aon 3). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionAONWTWMRSHLeader
Larger companyMarket capitalisation $67.78B $30.19B $91.43B MRSH
Cheaper on earningsLower P/E, profitable companies only 17.3x 19.3x 22.6x AON
Cheaper on forward earningsLower price / next fiscal year consensus EPS 16.7x 15.7x 18.7x WTW
Faster revenue growthRevenue growth, trailing twelve months +4.9% +3.0% +7.6% MRSH
More profitableNet margin, trailing twelve months 22.3% 15.5% 14.2% AON
Better return on capitalReturn on invested capital 14.8% 12.5% 13.1% AON
Less leveragedLower net debt / EBITDA 2.5x 1.8x 2.7x WTW
Higher dividend yieldTrailing dividend yield 0.01% 0.01% 0.02% MRSH
Better 1-year returnPrice return, last 12 months -10.2% -2.2% +1.6% MRSH
Better 5-year returnAnnualised price return, 5 years -1.2%/yr +5.2%/yr +2.6%/yr WTW
Less volatileAnnualised volatility, 1 year 29.2% 31.8% 26.0% MRSH
Higher overall scoreMean of the five percentile scores vs peers 41/100 44/100 36/100 WTW

Percentile Scorecard

AONWTWMRSH

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

AxisAONWTWMRSH
Valuation 11 #106 of 119 17 #99 of 119 10 #107 of 119
Growth 46 #62 of 114 75 #29 of 114 17 #95 of 114
Profitability 86 #16 of 110 72 #32 of 110 73 #30 of 110
Financial Health 5 #105 of 110 21 #87 of 110 20 #88 of 110
Shareholder Returns 57 #46 of 106 37 #67 of 106 59 #44 of 106
Overall 41 44 36
  • AON ranked among 126 companies in Insurance
  • WTW 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

PeriodAONWTWMRSHSPY
1 month +8.8%+8.7%+11.4% -0.2%
3 months -20.7%+1.1%-0.8% +3.9%
6 months -6.0%+9.9%+11.6% +8.2%
Year to date -14.3%-2.7%+2.8% +12.9%
1 year -10.2%-2.2%+1.6% +12.3%
3 years -1.5%+39.6%+3.1% +87.4%
3 years, per year -0.5%+11.8%+1.0% +23.3%
5 years -5.8%+28.6%+13.9% +67.9%
5 years, per year -1.2%+5.2%+2.6% +10.9%
10 years +178.9%+154.4%+201.8% +261.1%
10 years, per year +10.8%+9.8%+11.7% +13.7%

Risk

MeasureAONWTWMRSHSPY
Volatility, 1Y 29.2%31.8%26.0% 12.7%
Downside volatility, 1Y 31.0%33.4%24.9% 12.7%
Beta vs S&P 500, 1Y -0.30-0.18-0.39 1.00
Return / volatility, 1Y -0.35-0.070.06 0.97
Max drawdown, 5Y -34.2%-30.8%-35.6% -25.4%
From 52-week high -20.7%-8.9%-4.3% -1.2%
52-week high $381.11$350.75$199.34 $779.14
52-week low $269.45$242.12$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.

MultipleAONWTWMRSH
P/E now vs peer median 16.5xmedian 10.5x 19.2xmedian 10.5x 22.5xmedian 10.5x
P/S now vs peer median 3.6xmedian 1.4x 2.9xmedian 1.4x 3.2xmedian 1.4x
EV/EBITDA now vs peer median 14.0xmedian 7.6x 12.9xmedian 7.6x 15.6xmedian 7.6x
P/FCF now vs peer median 19.7xmedian 8.5x 17.6xmedian 8.5x 21.8xmedian 8.5x
P/B now vs peer median 6.6xmedian 1.5x 3.8xmedian 1.5x 6.1xmedian 1.5x
PEG now vs peer median 1.35median 0.53 1.05median 0.53 3.35median 0.53

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 monthsAONWTWMRSH
Revenue $17.58B $10.10B $28.46B
Operating income $4.65B $2.25B $6.09B
Net income $3.99B $1.58B $4.12B
Free cash flow $3.25B $1.69B $4.15B
EPS (diluted) $18.30 $16.65 $8.44
Cash & equivalents $1.06B $1.63B $1.84B
Total debt $14.97B $6.53B $20.53B
Shares (diluted) 213.90M 94.00M 479.00M
Enterprise value $61.00B $21.60B $83.59B

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
MetricAONWTWMRSH
P/E 16.5x 19.2x 22.5x
P/FCF 19.7x 17.6x 21.8x
P/Operating cash flow 18.2x 15.4x 20.2x
P/S 3.6x 2.9x 3.2x
P/B 6.6x 3.8x 6.1x
P/Tangible book 15.9x 4.7x 8.7x
EV/EBITDA 14.0x 12.9x 15.6x
EV/EBIT 16.7x 15.4x 17.9x
EV/Revenue 4.4x 3.4x 3.8x
EV/FCF 24.0x 20.5x 26.3x
EV/Operating cash flow 22.0x 18.0x 24.4x
PEG (3Y EPS CAGR) 1.35 1.05 3.35

Growth

14 metrics
MetricAONWTWMRSH
Revenue growth (1Y) 4.9% 3.0% 7.6%
Revenue CAGR (3Y) 10.9% 3.6% 8.6%
Gross profit growth (1Y) – – –
Gross profit CAGR (3Y) – – –
Operating income growth (1Y) 15.4% 140.2% -1.0%
Operating income CAGR (3Y) 5.9% 20.3% 7.8%
Net income growth (1Y) 49.7% 972.1% -1.9%
Net income CAGR (3Y) 13.4% 13.2% 5.5%
EPS growth (1Y) 52.8% 1,115% 1.0%
EPS CAGR (3Y) 12.2% 18.3% 6.7%
Operating cash flow growth (1Y) 12.1% 36.7% -12.1%
Operating cash flow CAGR (3Y) 3.1% 25.0% 4.0%
Free cash flow growth (1Y) 11.5% 43.3% -13.9%
Free cash flow CAGR (3Y) 3.3% 26.9% 5.1%

Profitability

14 metrics
MetricAONWTWMRSH
Gross margin – – –
EBITDA margin 31.6% 26.4% 24.6%
Operating margin 26.5% 22.2% 21.4%
Pretax margin 28.9% 19.8% 18.9%
Net margin 22.3% 15.5% 14.2%
FCF margin 18.5% 16.7% 14.6%
Operating cash flow margin 20.1% 19.0% 15.7%
Return on equity 40.6% 19.9% 27.2%
Return on assets 7.6% 5.2% 6.9%
Return on invested capital 14.8% 12.5% 13.1%
Return on capital employed 18.5% 15.1% 16.2%
Asset turnover 0.3x 0.3x 0.5x
Cash conversion (OCF / net income) 0.9x 1.2x 1.1x
Stock comp / revenue 2.1% 1.9% 1.5%

Financial Health

11 metrics
MetricAONWTWMRSH
Debt / assets 28.1% 21.4% 34.3%
Debt / equity 1.5x 0.8x 1.4x
Net debt / EBITDA 2.5x 1.8x 2.7x
Debt / FCF 4.6x 3.9x 4.9x
Liabilities / assets 81.8% 74.6% 75.1%
Equity / assets 18.2% 25.4% 24.9%
Interest coverage 6.2x 7.9x 6.3x
Current ratio 1.0x 1.1x 1.1x
Quick ratio 0.3x 0.3x 0.5x
Cash ratio 0.0x 0.1x 0.1x
Altman Z-score 1.52 1.38 2.74

Shareholder Returns

7 metrics
MetricAONWTWMRSH
Dividend yield 1.0% 1.2% 2.0%
Net buyback yield 2.4% 5.7% 3.2%
Shareholder yield 3.4% 6.9% 5.2%
Payout ratio (earnings) 16.5% 22.7% 43.6%
Payout ratio (FCF) 20.3% 21.1% 43.3%
Dividend growth (1Y) 9.5% 0.0% 8.4%
Dividend CAGR (3Y) 11.5% 0.0% 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.

ConsensusAONWTWMRSH
Forward P/E 16.7xFY2026 15.7xFY2026 18.7xFY2026
EPS, next fiscal year $18.15FY2026 $20.42FY2026 $10.21FY2026
EPS growth, next FY +6.3%FY2026 +19.6%FY2026 +4.7%FY2026
EPS growth, the year after +8.1% +8.1% +15.4%
Revenue, next fiscal year $19.12BFY2026 $10.10BFY2026 $30.28BFY2026
Revenue growth, next FY +11.3%FY2026 +4.1%FY2026 +12.2%FY2026
Revenue growth, the year after +8.7% +16.0% +6.4%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersAONWTWMRSH
Held by institutions 90.5% 97.1% 93.9%
Institutions holding 1,254 692 1,497
Change in shares held, QoQ +3.1% +0.8% +2.8%
Institutions buying 603 314 625
Institutions selling 448 280 652
Buyers to sellers 1.35 1.12 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.

AONWTWMRSH
AON 1.00 0.70 0.79
WTW 0.70 1.00 0.69
MRSH 0.79 0.69 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, AON, WTW and MRSH?

Marsh & Mclennan Companies (MRSH) is the largest by market capitalisation: Aon (AON) $67.78B, Willis Towers Watson (WTW) $30.19B, Marsh & Mclennan Companies (MRSH) $91.43B.

Which stock is cheaper, AON, WTW and MRSH?

Aon (AON) trades on the lowest price-to-earnings ratio (Aon (AON) 17.3x, Willis Towers Watson (WTW) 19.3x, Marsh & Mclennan Companies (MRSH) 22.6x). On next year's consensus earnings, Willis Towers Watson (WTW) is cheapest (Aon (AON) 16.7x, Willis Towers Watson (WTW) 15.7x, Marsh & Mclennan Companies (MRSH) 18.7x). 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: Aon (AON) +4.9%, Willis Towers Watson (WTW) +3.0%, Marsh & Mclennan Companies (MRSH) +7.6%.

Which company is more profitable?

Aon (AON) has the highest net margin (Aon (AON) 22.3%, Willis Towers Watson (WTW) 15.5%, Marsh & Mclennan Companies (MRSH) 14.2%). On return on invested capital, Aon (AON) leads (Aon (AON) 14.8%, Willis Towers Watson (WTW) 12.5%, Marsh & Mclennan Companies (MRSH) 13.1%).

Which stock has performed better?

Over the past year Marsh & Mclennan Companies (MRSH) returned the most: Aon (AON) -10.2%, Willis Towers Watson (WTW) -2.2%, Marsh & Mclennan Companies (MRSH) +1.6%. Over five years, Willis Towers Watson (WTW) compounded fastest (Aon (AON) -1.2%/yr, Willis Towers Watson (WTW) +5.2%/yr, Marsh & Mclennan Companies (MRSH) +2.6%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Marsh & Mclennan Companies (MRSH) has the highest dividend yield: Aon (AON) 0.01%, Willis Towers Watson (WTW) 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 (Aon (AON) 29.2%, Willis Towers Watson (WTW) 31.8%, Marsh & Mclennan Companies (MRSH) 26.0%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, AON, WTW 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, Marsh & Mclennan Companies (MRSH) leads on 5. 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.