Aon (AON) vs Marsh (MRSH)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 8, 2026.
Summary
Marsh (MRSH) has outperformed Aon (AON) over the past year, losing 14.8% versus a loss of 26.3%. Over five years, MRSH leads with a +7.2% price change compared with -12.6% for AON. Marsh is the larger company by market cap ($83.84 billion vs $58.56 billion), about 1.4 times the size.
On valuation, Aon trades at a lower forward P/E (13.6x vs 15.4x for Marsh). Marsh offers the higher dividend yield (2.10% vs 1.11%). Aon converts more of its revenue into profit, with a net margin of 21.5% versus 15.4%.
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | AON | MRSH |
|---|---|---|
| Share price | $276.04 | $175.69 |
| Market cap | $58.56B | $83.84B |
| 1-day change | +2.06% | +1.17% |
| YTD return | -23.35% | -6.39% |
| 1-year return | -26.29% | -14.81% |
| 5-year return | -12.55% | +7.20% |
| P/E ratio (TTM) | 15.22 | 21.48 |
| Forward P/E | 13.64 | 15.38 |
| EPS (TTM) | $18.14 | $8.18 |
| Dividend yield | 1.11% | 2.10% |
| Annual dividend | $3.06 | $3.69 |
| Revenue (latest FY) | $17.18B | $26.98B |
| Revenue growth (YoY) | +9.45% | +10.32% |
| Net income (latest FY) | $3.69B | $4.16B |
| Operating margin | 25.28% | 23.06% |
| Net margin | 21.51% | 15.42% |
| 52-week high | $382.34 | $207.83 |
| 52-week low | $266.33 | $156.60 |
| Distance from 52-week high | -27.80% | -15.46% |
| Analyst consensus | buy | hold |
| Avg. price target upside | +33.56% | +16.63% |
| Average volume | 1.55M | 2.49M |
| Shares outstanding | 212.13M | 477.21M |
| Employees | 60,000 | 95,000 |
| Sector | Finance | Finance |
| Industry | Specialty Insurers | Specialty Insurers |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- MRSH has outperformed AON by 11.5 percentage points over the past year.
- Marsh trades at a higher earnings multiple (21.5x vs 15.2x trailing P/E).
- Aon is more profitable, keeping 21.5 cents of every revenue dollar as net income versus 15.4 cents for Marsh.
About Aon
AON stock →Aon plc operates as a professional services firm in the United States, rest of the Americas, the United Kingdom, Ireland, rest of Europe, the Middle East, Africa, and the Asia Pacific. It operates through Risk Capital and Human Capital segments.
Finance · Specialty Insurers · 60,000 employees
About Marsh
MRSH stock →Marsh & McLennan Companies, Inc., a professional services company, provides advisory services and insurance solutions to clients in the areas of risk, strategy, and people worldwide. The company operates through Risk and Insurance Services, and Consulting segments.
Finance · Specialty Insurers · 95,000 employees
AON vs MRSH FAQ
Which is bigger, Aon or Marsh?
Marsh (MRSH) is larger, with a market capitalization of $83.84B compared with $58.56B for Aon (AON).
Which stock has performed better over the past year, AON or MRSH?
MRSH returned -14.81% over the past 12 months, compared with -26.29% for AON (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, AON or MRSH?
AON has the lower trailing P/E at 15.2, versus 21.5 for MRSH. A lower P/E is not by itself a sign of a better investment; it can reflect slower expected growth or higher risk.
Which pays a higher dividend, Aon or Marsh?
Marsh has the higher yield at 2.10%, compared with 1.11% for Aon.
Are Aon and Marsh in the same industry?
Yes. Both are classified in the Specialty Insurers industry within the Finance sector.