AJG vs. AON: Arthur J. Gallagher vs. Aon Stock Comparison
How do Arthur J. Gallagher (AJG) and Aon (AON) stack up? This page sets them side by side across company profile, performance and risk, profitability, growth, financial strength, dividends, and valuation, with selected fundamentals also measured against each stock's industry-group peers.
Company Profile
Arthur J. Gallagher (AJG) and Aon (AON) are both classified in the Insurance Brokers sub-industry within the broader Insurance industry, placing them in the closest GICS peer bucket.
| Profile Item | AJG | AON |
|---|---|---|
| Name | Arthur J. Gallagher & Co. | Aon plc Class A |
| Country/Region | United States | Ireland |
| GICS Sector | Financials | Financials |
| GICS Industry Group | Insurance | Insurance |
| GICS Industry | Insurance | Insurance |
| GICS Sub-Industry | Insurance Brokers | Insurance Brokers |
| Market Capitalization | 67.34 billion USD | 68.54 billion USD |
| Currency | USD | USD |
| Exchange | NYSE | NYSE |
| Listing Date | June 20, 1984 | June 2, 1980 |
| Security Type | Common Stock | Common Stock |
Price Performance
Cumulative Growth
Trailing Returns
Calendar-Year Returns
Performance Metrics
| Metric | AJG | AON |
|---|---|---|
| Total Return (1Y) | -11.52% | -13.07% |
| Total Return (3Y, Annualized) | 5.28% | -0.43% |
| Total Return (5Y, Annualized) | 13.65% | 2.82% |
Risk Profile
Drawdown History
Return Distribution
Risk Metrics
| Metric | AJG | AON |
|---|---|---|
| Volatility (1Y, Annualized) | 30.61% | 27.14% |
| Beta (5Y) | 0.53 | 0.68 |
| Max Drawdown (5Y) | -44.40% | -25.38% |
| Avg. Volume (3M) | 1.60M | 1.42M |
Risk-Adjusted Performance
Risk-Return Positioning
Risk-Adjusted Metrics
| Metric | AJG | AON |
|---|---|---|
| Sharpe Ratio (1Y) | -0.51 | -0.63 |
| Sortino Ratio (1Y) | -0.70 | -0.83 |
Profitability
ROE (TTM)
Aon (AON) at 44.70% delivers above-range ROE, while Arthur J. Gallagher (AJG) at 6.72% falls into the bottom quartile — a wide split in profit generated from equity.
AJG
Insurance industry group
6.72%
- Max
- 38.99%
- Q3
- 22.13%
- Median
- 15.10%
- Q1
- 10.16%
- AJG
- 6.72%
- Min
- -3.97%
AON
Insurance industry group
44.70%
- AON
- 44.70%
- Max
- 38.99%
- Q3
- 22.13%
- Median
- 15.10%
- Q1
- 10.16%
- Min
- -3.97%
Net Margin (TTM)
Aon (AON) at 22.27% retains a top-quartile share of revenue as profit, ahead of Arthur J. Gallagher (AJG) at 10.38%, which keeps about the industry-typical share.
AJG
Insurance industry group
10.38%
- Max
- 37.68%
- Q3
- 19.27%
- Median
- 11.38%
- AJG
- 10.38%
- Q1
- 5.91%
- Min
- -10.79%
AON
Insurance industry group
22.27%
- Max
- 37.68%
- AON
- 22.27%
- Q3
- 19.27%
- Median
- 11.38%
- Q1
- 5.91%
- Min
- -10.79%
Operating Margin (TTM)
Neither side reports a meaningful operating margin: for Arthur J. Gallagher (AJG) in Insurance and Aon (AON) in Insurance, funding costs are part of the core business, so net margin and ROE are the cleaner profitability reads.
Profitability Metrics
| Metric | AJG | AON |
|---|---|---|
| ROE (TTM) | 6.72% | 44.70% |
| ROA (TTM) | 2.32% | 5.83% |
| Net Margin (TTM) | 10.38% | 22.27% |
| Operating Margin (TTM) | -- | -- |
| Gross Margin (TTM) | -- | -- |
Growth
Revenue Growth
Both Arthur J. Gallagher (AJG) at 20.66% and Aon (AON) at 9.45% land near their industries' usual revenue growth ranges, so top-line momentum looks broadly in line with peers on both sides.
EPS Growth
Both Arthur J. Gallagher (AJG) at -11.69% and Aon (AON) at 36.27% land near their industries' usual EPS growth ranges, so bottom-line momentum looks broadly in line with peers on both sides.
Growth Metrics
| Metric | AJG | AON |
|---|---|---|
| Revenue Growth (YoY) | 20.66% | 9.45% |
| Revenue Growth (3Y CAGR) | 17.70% | 11.25% |
| EPS Growth (YoY) | -11.69% | 36.27% |
| EPS Growth (3Y CAGR) | 3.41% | 11.92% |
Financial Strength
Current Ratio (MRQ)
current ratio doesn’t apply on either side: Arthur J. Gallagher (AJG) in Insurance and Aon (AON) in Insurance both report balance sheets without a current/non-current split, so their short-term liquidity is better judged through regulatory and funding measures.
Debt / Equity (MRQ)
debt-to-equity ratio is set aside for both: Arthur J. Gallagher (AJG) in Insurance and Aon (AON) in Insurance run businesses where balance-sheet leverage is part of the model, so capital-adequacy and funding measures are the better gauges of balance-sheet risk.
Financial Strength Metrics
| Metric | AJG | AON |
|---|---|---|
| Current Ratio (MRQ) | -- | -- |
| Debt / Equity (MRQ) | -- | -- |
| Net Debt / EBITDA | -- | -- |
Dividends
Dividend Yield (TTM)
Both Arthur J. Gallagher (AJG) at 1.01% and Aon (AON) at 0.93% pay solid, industry-typical yields, sitting squarely within their peers’ usual range.
AJG
Insurance industry group
1.01%
- Max
- 4.67%
- Q3
- 2.38%
- Median
- 1.20%
- AJG
- 1.01%
- Q1
- 0.00%
- Min
- 0.00%
AON
Insurance industry group
0.93%
- Max
- 4.67%
- Q3
- 2.38%
- Median
- 1.20%
- AON
- 0.93%
- Q1
- 0.00%
- Min
- 0.00%
Dividend Payout Ratio (TTM)
Aon (AON) at 16.84% pays out a band-typical share of earnings, while Arthur J. Gallagher (AJG) at 44.78% distributes more than its industry norm — less retained, thinner cover.
AJG
Insurance industry group
44.78%
- Max
- 79.14%
- AJG
- 44.78%
- Q3
- 34.33%
- Median
- 15.16%
- Q1
- 0.00%
- Min
- 0.00%
AON
Insurance industry group
16.84%
- Max
- 79.14%
- Q3
- 34.33%
- AON
- 16.84%
- Median
- 15.16%
- Q1
- 0.00%
- Min
- 0.00%
Dividend Metrics
| Metric | AJG | AON |
|---|---|---|
| Dividend Yield (TTM) | 1.01% | 0.93% |
| Dividend Payout Ratio (TTM) | 44.78% | 16.84% |
Valuation
P/E Ratio (TTM)
Aon (AON) at 17.82 is near its industry’s usual P/E ratio, while Arthur J. Gallagher (AJG) at 43.49 sits above its peer range — an unusually expensive price for AJG’s trailing earnings.
AJG
Insurance industry group
43.49
- AJG
- 43.49
- Max
- 28.23
- Q3
- 18.78
- Median
- 12.33
- Q1
- 8.87
- Min
- 3.24
AON
Insurance industry group
17.82
- Max
- 28.23
- Q3
- 18.78
- AON
- 17.82
- Median
- 12.33
- Q1
- 8.87
- Min
- 3.24
P/S Ratio (TTM)
Both look expensive on sales: Aon (AON) at 3.90 sits in the upper P/S ratio quartile, and Arthur J. Gallagher (AJG) at 4.46 prices even higher, above its industry range.
AJG
Insurance industry group
4.46
- AJG
- 4.46
- Max
- 4.26
- Q3
- 2.31
- Median
- 1.27
- Q1
- 0.92
- Min
- 0.08
AON
Insurance industry group
3.90
- Max
- 4.26
- AON
- 3.90
- Q3
- 2.31
- Median
- 1.27
- Q1
- 0.92
- Min
- 0.08
P/B Ratio (MRQ)
Both look rich against book: Arthur J. Gallagher (AJG) at 2.84 sits in the upper P/B ratio quartile, and Aon (AON) at 7.14 prices even higher, above its industry range.
AJG
Insurance industry group
2.84
- Max
- 4.84
- AJG
- 2.84
- Q3
- 2.72
- Median
- 1.92
- Q1
- 1.24
- Min
- 0.45
AON
Insurance industry group
7.14
- AON
- 7.14
- Max
- 4.84
- Q3
- 2.72
- Median
- 1.92
- Q1
- 1.24
- Min
- 0.45
Valuation Metrics
| Metric | AJG | AON |
|---|---|---|
| P/E Ratio (TTM) | 43.49 | 17.82 |
| P/S Ratio (TTM) | 4.46 | 3.90 |
| P/B Ratio (MRQ) | 2.84 | 7.14 |
| Free Cash Flow Yield (TTM) | -- | -- |