Stocks Comparison
Arthur J. Gallagher vs Aon: revenue, profit, margins and growth compared
Arthur J. Gallagher brought in $13.9B of revenue in fiscal 2025, Aon $17.2B in fiscal 2025. Revenue changed by +20.7% at Arthur J. Gallagher and +9.4% at Aon on the year before, so Arthur J. Gallagher grew faster. Arthur J. Gallagher kept 10.7% of its revenue as net profit, Aon 21.5%. Free cash flow was $1.8B at Arthur J. Gallagher and $3.2B at Aon.
Side by side, latest fiscal year
| AJG | AON | |
|---|---|---|
| Fiscal year ended | FY2025 (December 31, 2025) | FY2025 (December 31, 2025) |
| Revenue | $13.9B | $17.2B |
| Revenue growth | +20.7% | +9.4% |
| Net income | $1.5B | $3.7B |
| Net margin | 10.7% | 21.5% |
| Free cash flow | $1.8B | $3.2B |
| Free cash flow margin | 12.8% | 18.7% |
| Earnings per share (diluted) | $5.74 | $17.02 |
| Cash | $1.4B | $1.2B |
| Debt | $12.9B | $15.2B |
| Price to earnings | 40.3 | 16.3 |
| Market value | $59.2B | $59B |
| Dividend yield | 1.13% | 1.05% |
| Rank by revenue in sector | #49 of 444 · Finance | #37 of 444 · Finance |
Over the years
Questions about Arthur J. Gallagher and Aon
Which is bigger by revenue, Arthur J. Gallagher or Aon?
Aon is bigger by revenue: $17.2B in fiscal 2025, against $13.9B for Arthur J. Gallagher in fiscal 2025.
Which keeps more of its revenue as profit, Arthur J. Gallagher or Aon?
Arthur J. Gallagher had a net margin of 10.7% in fiscal 2025; Aon had 21.5% in fiscal 2025.
Which grew revenue faster, Arthur J. Gallagher or Aon?
In their latest fiscal years revenue changed by +20.7% at Arthur J. Gallagher and +9.4% at Aon.
Where do these numbers come from?
From the annual reports each company files with the SEC (10-K, or 20-F and 40-F for foreign companies), read from their XBRL data. Margins and growth are simple arithmetic on those figures. Nothing here is a recommendation.