AON vs MRSH
Aon (AON) and Marsh McLennan (MRSH) compared side by side. Marsh McLennan (MRSH) is larger, with a market cap of $93.9B versus $64.4B for Aon, about 1.5 times the size. On trailing earnings, AON is cheaper at 16.7x versus 23.6x for MRSH.
Head to head
| Metric | AON | MRSH |
|---|---|---|
| Market cap | $64.4B | $93.9B |
| P/E (TTM) | 16.7x | 23.6x |
| Forward P/E | 15.0x | 17.2x |
| Revenue (TTM) | $17.6B | $28.5B |
| Revenue growth | 2.2% | 8.1% |
| Gross margin | 48.2% | 44.5% |
| Operating margin | 23.5% | 18.4% |
| Free cash flow | $3.2B | $4.8B |
| Dividend yield | 1.08% | 2.01% |
| 1-year return | -10.6% | +7.3% |
| 5-year return (annual) | -0.4% | +4.8% |
| Max drawdown | -67% | -67% |
| FI Handbook grade | C+ | B- |
Highlighted: the stronger figure on metrics where higher or lower is clearly better.
Growth of $10,000 (5 years, price only)
AON vs MRSH FAQ
Which is bigger, AON or MRSH?
Marsh McLennan (MRSH) is larger, with a market cap of $93.9B versus $64.4B for Aon, about 1.5 times the size.
Is AON or MRSH cheaper?
On trailing earnings, AON is cheaper at 16.7x versus 23.6x for MRSH. A lower P/E can reflect slower expected growth, so compare growth and margins too.
Which stock performed better over the past year, AON or MRSH?
MRSH returned +7.3% over the past year including dividends, versus -10.6% for AON, through October 23, 2026.
Which pays a higher dividend, AON or MRSH?
MRSH yields 2.01% versus 1.08% for AON.
Full pages: Aon · Marsh McLennan