Stocks Comparison
Aon vs Willis Towers Watson: revenue, profit, margins and growth compared
Aon brought in $17.2B of revenue in fiscal 2025, Willis Towers Watson $9.7B in fiscal 2025. Revenue changed by +9.4% at Aon and -2.2% at Willis Towers Watson on the year before, so Aon grew faster. Aon kept 21.5% of its revenue as net profit, Willis Towers Watson 16.5%. Free cash flow was $3.2B at Aon and $1.5B at Willis Towers Watson.
Side by side, latest fiscal year
| AON | WTW | |
|---|---|---|
| Fiscal year ended | FY2025 (December 31, 2025) | FY2025 (December 31, 2025) |
| Revenue | $17.2B | $9.7B |
| Revenue growth | +9.4% | -2.2% |
| Net income | $3.7B | $1.6B |
| Net margin | 21.5% | 16.5% |
| Free cash flow | $3.2B | $1.5B |
| Free cash flow margin | 18.7% | 15.9% |
| Earnings per share (diluted) | $17.02 | $16.26 |
| Cash | $1.2B | $3.1B |
| Debt | $15.2B | $9.7B |
| Price to earnings | 16.3 | 18.1 |
| Market value | $59B | $27.3B |
| Dividend yield | 1.05% | 1.25% |
| Rank by revenue in sector | #37 of 444 · Finance | #62 of 444 · Finance |
Over the years
Questions about Aon and Willis Towers Watson
Which is bigger by revenue, Aon or Willis Towers Watson?
Aon is bigger by revenue: $17.2B in fiscal 2025, against $9.7B for Willis Towers Watson in fiscal 2025.
Which keeps more of its revenue as profit, Aon or Willis Towers Watson?
Aon had a net margin of 21.5% in fiscal 2025; Willis Towers Watson had 16.5% in fiscal 2025.
Which grew revenue faster, Aon or Willis Towers Watson?
In their latest fiscal years revenue changed by +9.4% at Aon and -2.2% at Willis Towers Watson.
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.