Aon
Through the investors’ lenses
Each of these investors has said in public what they look at before buying. Click a name to see how this company measures up — a tick where it passes one of their tests, a cross where it does not.
Warren Buffett 3/4
| Measure | AON | Checked against | |
|---|---|---|---|
| Owner earnings | $3.62bn | positive | ✓ |
| Return on equity | 39.5% | median 11.7% | ✓ |
| Debt to equity | 1.63x | median 0.79x | ✗ |
| Operating margin | 25.3% | median 15.0% | ✓ |
Passes 3 of 4. To be clear: Warren Buffett has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
Terry Smith 2/3
| Measure | AON | Checked against | |
|---|---|---|---|
| Return on capital employed | 17.7% | median 10.1% | ✓ |
| Cash conversion | — | median 1.78x | — |
| Operating margin | 25.3% | median 15.0% | ✓ |
| Debt to equity | 1.63x | median 0.79x | ✗ |
Passes 2 of 3. To be clear: Terry Smith has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
Charlie Munger 3/3
| Measure | AON | Checked against | |
|---|---|---|---|
| Return on capital employed | 17.7% | median 10.1% | ✓ |
| Return on equity | 39.5% | median 11.7% | ✓ |
| Operating margin | 25.3% | median 15.0% | ✓ |
Passes 3 of 3. To be clear: Charlie Munger has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
Chuck Akre 2/3
| Measure | AON | Checked against | |
|---|---|---|---|
| Return on equity | 39.5% | median 11.7% | ✓ |
| Debt to equity | 1.63x | median 0.79x | ✗ |
| Cash conversion | — | median 1.78x | — |
| Return on equity, sustained | 8 of 8 | 8 of 10 above median | ✓ |
Passes 2 of 3. To be clear: Chuck Akre has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
Philip Fisher 4/4
| Measure | AON | Checked against | |
|---|---|---|---|
| Operating margin | 25.3% | median 15.0% | ✓ |
| Net margin | 21.5% | median 10.2% | ✓ |
| Return on capital employed | 17.7% | median 10.1% | ✓ |
| Operating margin, held or improving | 25.3% | 10-yr median 19.7% | ✓ |
Passes 4 of 4. To be clear: Philip Fisher has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
Walter Schloss 0/2
| Measure | AON | Checked against | |
|---|---|---|---|
| Current ratio | 1.11x | median 1.25x | ✗ |
| Debt to equity | 1.63x | median 0.79x | ✗ |
Passes 0 of 2. To be clear: Walter Schloss has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
Benjamin Graham 1/3
| Measure | AON | Checked against | |
|---|---|---|---|
| Current ratio | 1.11x | 2.00x published | ✗ |
| Long-term debt to working capital | 5.75x | 1.00x published | ✗ |
| Positive earnings, ten years running | 10 yrs | 10 published | ✓ |
Passes 1 of 3. To be clear: Benjamin Graham has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
Joel Greenblatt 1/1
| Measure | AON | Checked against | |
|---|---|---|---|
| Return on capital employed | 17.7% | median 10.1% | ✓ |
Passes 1 of 1. To be clear: Joel Greenblatt has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
Peter Lynch 1/2
| Measure | AON | Checked against | |
|---|---|---|---|
| Debt to equity | 1.63x | median 0.79x | ✗ |
| Net margin | 21.5% | median 10.2% | ✓ |
Passes 1 of 2. To be clear: Peter Lynch has never said anything about Aon. These are the company’s own figures put through the tests he described. What he looks at, and why →
| Basis | Payout | Why |
|---|---|---|
| GAAP earnings | 17.1% | whyThe figure most screeners publish. |
| Operating cash flow | 18.1% | whyAbsorbs working-capital swings that earnings do not. |
| Free cash flow | 19.5% | whyAfter maintaining the business. |
Spread between highest and lowest: 2.4 percentage points. Same filings, different denominators.
Coverage rating 51 / 100 — Tight. ? Peer standing 24/50Direction 10/30Stability 17/20
Free cash flow payout, last 6 years
| Fiscal year | Payout |
|---|---|
| 2025-12-31 | 19.5% |
| 2024-12-31 | 20.0% |
| 2023-12-31 | 15.4% |
| 2022-12-31 | 15.3% |
| 2021-12-31 | 21.9% |
| 2020-12-31 | 15.6% |
48% of the 25 financial services here pay out more.
The arithmetic
- GAAP earnings — dividends declared per share $2.91 ÷ diluted EPS $17.02
- Operating cash flow — dividends paid $629m ÷ operating cash flow $3,481m
- Free cash flow — dividends paid $629m ÷ (operating cash flow $3,481m − capex $263m)
Where the figures came from
- 10-K filed 2026-02-13 · accession 0001628280-26-008116
All public at sec.gov — you should not have to take our word for it.
Computed straight from SEC XBRL. A number that looks wrong to you is more useful to us than agreement — tell us.
What the free cash flow payout ratio measures, and where every company here sits on it.
Also on: rated tight · when it files.
When this changes
Every figure above is recomputed whenever Aon files. The monthly letter carries what filed, what moved, and one finding computed across every company here.