AON vs. BRK.B: A Head-to-Head Stock Comparison

Updated on August 23, 2025

Here’s a clear look at AON and BRK.B, comparing key factors like historical performance, profitability, financial strength, growth, dividend, and valuation.

Company Profile

Symbol	AON	BRK.B
Company Name	Aon plc	Berkshire Hathaway Inc.
Country	Ireland	United States
GICS Sector	Financials	Financials
GICS Industry	Insurance	Financial Services
Market Capitalization	80.64 billion USD	1,053.85 billion USD
Exchange	NYSE	NYSE
Listing Date	June 2, 1980	May 9, 1996
Security Type	Common Stock	Common Stock

Historical Performance

This chart compares the performance of AON and BRK.B by tracking the growth of an initial $10,000 investment in each. Use the tabs to select the desired time period. Data is adjusted for dividends and splits.

AON vs. BRK.B: Growth of a $10,000 investment over the past one year.

Historical Performance at a Glance

Symbol	AON	BRK.B
5-Day Price Return	0.52%	1.97%
13-Week Price Return	3.02%	-4.48%
26-Week Price Return	-3.59%	1.57%
52-Week Price Return	12.29%	8.90%
Month-to-Date Return	4.82%	1.80%
Year-to-Date Return	3.81%	7.62%
10-Day Avg. Volume	1.44M	0.00M
3-Month Avg. Volume	1.42M	0.00M
3-Month Volatility	21.92%	12.78%
Beta	0.91	0.48

Profitability

Return on Equity (TTM)

AON

38.26%

Insurance Industry

Max: 29.03%
Q3: 18.11%
Median: 13.90%
Q1: 10.42%
Min: -0.64%

AON’s Return on Equity of 38.26% is exceptionally high, placing it well beyond the typical range for the Insurance industry. This demonstrates a superior ability to generate profit from shareholder investments, though it could also be inflated by high financial leverage.

BRK.B

9.68%

Financial Services Industry

Max: 40.58%
Q3: 20.06%
Median: 10.67%
Q1: 4.19%
Min: -10.31%

BRK.B’s Return on Equity of 9.68% is on par with the norm for the Financial Services industry, indicating its profitability relative to shareholder equity is typical for the sector.

AON vs. BRK.B: A comparison of their Return on Equity (TTM) against their respective Insurance and Financial Services industry benchmarks.

Net Profit Margin (TTM)

AON

15.54%

Insurance Industry

Max: 26.78%
Q3: 14.06%
Median: 9.15%
Q1: 5.48%
Min: -7.05%

A Net Profit Margin of 15.54% places AON in the upper quartile for the Insurance industry, signifying strong profitability and more effective cost management than most of its peers.

BRK.B

17.00%

Financial Services Industry

Max: 52.86%
Q3: 25.58%
Median: 12.23%
Q1: 6.64%
Min: -9.92%

BRK.B’s Net Profit Margin of 17.00% is aligned with the median group of its peers in the Financial Services industry. This indicates its ability to convert revenue into profit is typical for the sector.

AON vs. BRK.B: A comparison of their Net Profit Margin (TTM) against their respective Insurance and Financial Services industry benchmarks.

Operating Profit Margin (TTM)

AON

24.55%

Insurance Industry

Max: 35.49%
Q3: 19.49%
Median: 14.35%
Q1: 8.53%
Min: -5.25%

In the Insurance industry, Operating Profit Margin is often not the primary measure of operational efficiency.

BRK.B

13.29%

Financial Services Industry

Max: 77.28%
Q3: 37.68%
Median: 18.17%
Q1: 9.27%
Min: -8.19%

BRK.B’s Operating Profit Margin of 13.29% is around the midpoint for the Financial Services industry, indicating that its efficiency in managing core business operations is typical for the sector.

AON vs. BRK.B: A comparison of their Operating Profit Margin (TTM) against their respective Insurance and Financial Services industry benchmarks.

Profitability at a Glance

Symbol	AON	BRK.B
Return on Equity (TTM)	38.26%	9.68%
Return on Assets (TTM)	5.12%	5.44%
Net Profit Margin (TTM)	15.54%	17.00%
Operating Profit Margin (TTM)	24.55%	13.29%
Gross Profit Margin (TTM)	47.00%	16.97%

Financial Strength

Current Ratio (MRQ)

AON

1.03

Insurance Industry

Max: 2.97
Q3: 1.33
Median: 0.55
Q1: 0.15
Min: 0.00

For the Insurance industry, the Current Ratio is often not the most suitable measure of short-term liquidity.

BRK.B

1.95

Financial Services Industry

Max: 4.58
Q3: 2.59
Median: 1.33
Q1: 0.69
Min: 0.01

For the Financial Services industry, the Current Ratio is often not the most suitable measure of short-term liquidity.

AON vs. BRK.B: A comparison of their Current Ratio (MRQ) against their respective Insurance and Financial Services industry benchmarks.

Debt-to-Equity Ratio (MRQ)

AON

2.20

Insurance Industry

Max: 1.25
Q3: 0.65
Median: 0.34
Q1: 0.22
Min: 0.00

The Debt-to-Equity Ratio is often not the primary focus for assessing leverage in the Insurance industry.

BRK.B

0.19

Financial Services Industry

Max: 4.96
Q3: 2.10
Median: 0.57
Q1: 0.12
Min: 0.00

The Debt-to-Equity Ratio is often not the primary focus for assessing leverage in the Financial Services industry.

AON vs. BRK.B: A comparison of their Debt-to-Equity Ratio (MRQ) against their respective Insurance and Financial Services industry benchmarks.

Interest Coverage Ratio (TTM)

AON

6.29

Insurance Industry

Max: 43.68
Q3: 20.84
Median: 9.56
Q1: 3.34
Min: -5.73

The Interest Coverage Ratio is often not a primary indicator of debt servicing capacity in the Insurance industry.

BRK.B

0.57

Financial Services Industry

Max: 136.23
Q3: 56.08
Median: 6.55
Q1: 2.01
Min: -33.27

The Interest Coverage Ratio is often not a primary indicator of debt servicing capacity in the Financial Services industry.

AON vs. BRK.B: A comparison of their Interest Coverage Ratio (TTM) against their respective Insurance and Financial Services industry benchmarks.

Financial Strength at a Glance

Symbol	AON	BRK.B
Current Ratio (MRQ)	1.03	1.95
Quick Ratio (MRQ)	1.02	1.68
Debt-to-Equity Ratio (MRQ)	2.20	0.19
Interest Coverage Ratio (TTM)	6.29	0.57

Growth

Revenue Growth

AON vs. BRK.B: A side-by-side comparison of their Revenue Growth for the MRQ (YoY), TTM (YoY), 3-Year CAGR, and 5-Year CAGR periods.

EPS Growth

AON vs. BRK.B: A side-by-side comparison of their EPS Growth for the MRQ (YoY), TTM (YoY), 3-Year CAGR, and 5-Year CAGR periods.

Dividend

Dividend Yield (TTM)

AON

0.75%

Insurance Industry

Max: 8.23%
Q3: 4.54%
Median: 3.42%
Q1: 1.97%
Min: 0.00%

AON’s Dividend Yield of 0.75% is in the lower quartile for the Insurance industry. This suggests the company’s strategy likely favors retaining earnings for growth over providing a high dividend income.

BRK.B

0.00%

Financial Services Industry

Max: 8.18%
Q3: 3.60%
Median: 1.56%
Q1: 0.00%
Min: 0.00%

BRK.B currently does not pay a dividend, resulting in a yield of 0%. This is a common strategy for growth-focused companies that prioritize reinvesting earnings, though it may be less typical in mature, income-oriented sectors.

AON vs. BRK.B: A comparison of their Dividend Yield (TTM) against their respective Insurance and Financial Services industry benchmarks.

Dividend Payout Ratio (TTM)

AON

23.09%

Insurance Industry

Max: 168.02%
Q3: 85.57%
Median: 50.71%
Q1: 22.04%
Min: 0.00%

AON’s Dividend Payout Ratio of 23.09% is within the typical range for the Insurance industry, suggesting a balanced approach between shareholder payouts and company reinvestment.

BRK.B

0.00%

Financial Services Industry

Max: 155.56%
Q3: 63.71%
Median: 18.08%
Q1: 0.00%
Min: 0.00%

BRK.B has a Dividend Payout Ratio of 0%, indicating it does not currently pay a dividend. This is a common strategy for growth-oriented companies that reinvest all profits back into the business.

AON vs. BRK.B: A comparison of their Dividend Payout Ratio (TTM) against their respective Insurance and Financial Services industry benchmarks.

Dividend at a Glance

Symbol	AON	BRK.B
Dividend Yield (TTM)	0.75%	0.00%
Dividend Payout Ratio (TTM)	23.09%	0.00%

Valuation

Price-to-Earnings Ratio (TTM)

AON

30.92

Insurance Industry

Max: 28.91
Q3: 17.76
Median: 13.63
Q1: 10.02
Min: 2.89

At 30.92, AON’s P/E Ratio is exceptionally high, exceeding the typical maximum for the Insurance industry. This suggests the stock may be significantly overvalued compared to its peers and implies high market expectations that could be difficult to meet.

BRK.B

16.79

Financial Services Industry

Max: 63.23
Q3: 32.10
Median: 14.41
Q1: 10.81
Min: 0.37

BRK.B’s P/E Ratio of 16.79 is within the middle range for the Financial Services industry. This suggests its valuation is in line with the sector average, representing neither a significant premium nor a discount compared to its peers.

AON vs. BRK.B: A comparison of their Price-to-Earnings Ratio (TTM) against their respective Insurance and Financial Services industry benchmarks.

Price-to-Sales Ratio (TTM)

AON

4.80

Insurance Industry

Max: 3.72
Q3: 1.98
Median: 1.23
Q1: 0.81
Min: 0.23

With a P/S Ratio of 4.80, AON trades at a valuation that eclipses even the highest in the Insurance industry. This implies the market has priced in exceptionally optimistic scenarios for future revenue growth, posing considerable valuation risk.

BRK.B

2.85

Financial Services Industry

Max: 11.16
Q3: 5.45
Median: 2.61
Q1: 1.25
Min: 0.04

The P/S Ratio is often not a primary valuation tool in the Financial Services industry.

AON vs. BRK.B: A comparison of their Price-to-Sales Ratio (TTM) against their respective Insurance and Financial Services industry benchmarks.

Price-to-Book Ratio (MRQ)

AON

9.82

Insurance Industry

Max: 4.37
Q3: 2.48
Median: 1.68
Q1: 1.19
Min: 0.19

At 9.82, AON’s P/B Ratio is at an extreme premium to the Insurance industry. This signifies that the market’s valuation is heavily reliant on future potential rather than its current net asset value, which can be a high-risk proposition.

BRK.B

1.57

Financial Services Industry

Max: 7.09
Q3: 3.79
Median: 1.46
Q1: 0.83
Min: 0.04

BRK.B’s P/B Ratio of 1.57 is within the conventional range for the Financial Services industry. This shows a balanced market view, where the stock’s price is neither at a significant premium nor a discount to the book value of its peers.

AON vs. BRK.B: A comparison of their Price-to-Book Ratio (MRQ) against their respective Insurance and Financial Services industry benchmarks.

Valuation at a Glance

Symbol	AON	BRK.B
Price-to-Earnings Ratio (TTM)	30.92	16.79
Price-to-Sales Ratio (TTM)	4.80	2.85
Price-to-Book Ratio (MRQ)	9.82	1.57
Price-to-Free Cash Flow Ratio (TTM)	27.64	89.18