AJG vs AON
Arthur J. Gallagher (AJG) and Aon (AON) compared side by side. Arthur J. Gallagher (AJG) is larger, with a market cap of $68.7B versus $64.4B for Aon, about 1.1 times the size. On trailing earnings, AON is cheaper at 16.7x versus 44.5x for AJG.
Head to head
| Metric | AJG | AON |
|---|---|---|
| Market cap | $68.7B | $64.4B |
| P/E (TTM) | 44.5x | 16.7x |
| Forward P/E | 18.1x | 15.0x |
| Revenue (TTM) | $15.1B | $17.6B |
| Revenue growth | 30.9% | 2.2% |
| Gross margin | 43.2% | 48.2% |
| Operating margin | 19.2% | 23.5% |
| Free cash flow | $2.3B | $3.2B |
| Dividend yield | 1.04% | 1.08% |
| 1-year return | -4.0% | -10.6% |
| 5-year return (annual) | +11.3% | -0.4% |
| Max drawdown | -58% | -67% |
| FI Handbook grade | C+ | C+ |
Highlighted: the stronger figure on metrics where higher or lower is clearly better.
Growth of $10,000 (5 years, price only)
AJG vs AON FAQ
Which is bigger, AJG or AON?
Arthur J. Gallagher (AJG) is larger, with a market cap of $68.7B versus $64.4B for Aon, about 1.1 times the size.
Is AJG or AON cheaper?
On trailing earnings, AON is cheaper at 16.7x versus 44.5x for AJG. A lower P/E can reflect slower expected growth, so compare growth and margins too.
Which stock performed better over the past year, AJG or AON?
AJG returned -4.0% over the past year including dividends, versus -10.6% for AON, through October 23, 2026.
Which pays a higher dividend, AJG or AON?
AON yields 1.08% versus 1.04% for AJG.
Full pages: Arthur J. Gallagher · Aon