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AonMIL:1AON -0.51%70 ROC (Joel Greenblatt) % is 249.60% as of Jun. 2026, which is 25% above its 10-year median of 199.22. GuruFocus rates MIL:1AON with a GF Score™ of 70/100 and a GF Value™ of €338.00 (Fairly Valued). The stock has 2 warning signs investors should review. Among 65 Insurance companies, Aon ranks better than 76.92% on this metric.
Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits). He defines ROC (Joel Greenblatt) % as EBIT divided by the total of Property, Plant and Equipment and net working capital. Aon's annualized ROC (Joel Greenblatt) % for the quarter that ended in Jun. 2026 was 249.60%.
The historical rank and industry rank for Aon's ROC (Joel Greenblatt) % or its related term are showing as below:
MIL:1AON'
s ROC (Joel Greenblatt) % Range Over the Past 10 Years
Min: 110.71 Med: 199.22 Max: 414.51
Current: 414.51
During the past 13 years, Aon's highest ROC (Joel Greenblatt) % was 414.51%. The lowest was 110.71%. And the median was 199.22%.
MIL:1AON's ROC (Joel Greenblatt) % is ranked better than 76.92% of 65
companies
in the Insurance industry
Industry Median: 74.51
vs MIL:1AON: 414.51
Aon's 5-Year average Growth Rate of ROC (Joel Greenblatt) % was 29.60% per year.
Aon (MIL:1AON) ROC (Joel Greenblatt) % Explanation
The way Joel Greenblatt defines Return on Capital is a more accurate measure of how efficiently the company generates returns onthe capital actually invested in the business. EBIT is used instead of net income because the tax and interest payment may be affected by factors other than the core business operation. Intangible assets are not included in the calculation because they don't need to be replaced.
The historical data trend for Aon's ROC (Joel Greenblatt) % can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
MIL:1AON vs MRSH, AJG, WTW: ROC (Joel Greenblatt) % Comparison
For the Insurance Brokers subindustry, Aon's ROC (Joel Greenblatt) %, along with its competitors' market caps and ROC (Joel Greenblatt) % data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Aon ROC (Joel Greenblatt) % vs Insurance Industry
For the Insurance industry and Financial Services sector, Aon's ROC (Joel Greenblatt) % distribution charts can be found below:
* The bar in red indicates where Aon's ROC (Joel Greenblatt) % falls into.
Joel Greenblatt defined Return on Capital differently in his book The Little Book That Still Beats the Market (Little Books. Big Profits) . He defines Return on Capital as follows:
EBIT stands for Earnings Before Interest and Taxes.
Fixed Assets are also known as non-current assets. They include the Property, Plant and Equipment that the firm needs in its operation.
GuruFocus calculates net working capital as: (Accounts Receivable + Total Inventories + Other Current Assets) - (Accounts Payable & Accrued Expense + Deferred Revenue + Other Current Liabilities). We're trying to account for OPERATING assets and liabilities (part of daily business) when calculating working capital. Cash and marketable securities are considered NON-OPERATING assets and are not included in calculation. We will also back out all interest bearing debt, short term debt and the portion of long term debt that is due in the current period from the current liabilities. This debt will be considered when computing cost of capital and it would be inappropriate to count it twice.
Note:
The EBIT data used here is four times the quarterly (Jun. 2026) EBIT data.
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
What does a ROC (Joel Greenblatt) % of 249.60% mean?
Aon (MIL:1AON) has a ROC (Joel Greenblatt) % of 249.60% as of Jun. 2026. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Aon and its competitors. This is 25% above median its historical median of 199.22. Over the past decade, Aon's ROC (Joel Greenblatt) % has ranged from 110.71 to 414.51. According to the industry distribution chart, Aon ranks #15 out of 65 companies in the Insurance industry, placing it in the top 23.1%.
Is Aon's ROC (Joel Greenblatt) % too high?
Aon's current ROC (Joel Greenblatt) % of 249.60% is 25% above median its 10-year median of 199.22. Over the past 10 years, this metric has ranged from a low of 110.71 to a high of 414.51. The Insurance industry median ROC (Joel Greenblatt) % is 74.51. Aon's value of 249.60% is 235% above this industry median. Based on the distribution chart, Aon ranks #15 out of 65 companies in the Insurance industry, which is in the top quartile — a strong position relative to peers. Overall, Aon has a GF Score™ of 70/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Aon's ROC (Joel Greenblatt) % compare to MRSH and AJG?
According to the Insurance industry distribution chart, Aon ranks #15 out of 65 companies for ROC (Joel Greenblatt) %. This places Aon in the top 23% of its industry — outperforming the majority of peers. The industry median ROC (Joel Greenblatt) % is 74.51. Aon's value of 249.60% is 235% above this benchmark. Historically, Aon's own ROC (Joel Greenblatt) % has ranged from 110.71 to 414.51 over the past decade. While the company's 10-year median is 199.22 vs. the industry median of 74.51, Aon has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good ROC (Joel Greenblatt) % for an Insurance company?
The median ROC (Joel Greenblatt) % among Insurance companies is 74.51, based on 65 companies in the industry. Companies in the top quartile (top 25%) have a ROC (Joel Greenblatt) % significantly above this median, while those in the bottom quartile fall well below. However, ROC (Joel Greenblatt) % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Aon's current ROC (Joel Greenblatt) % of 249.60% is 235% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high ROC (Joel Greenblatt) % mean?
A high ROC (Joel Greenblatt) % can signal that a stock is expensive relative to its fundamentals. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on Aon and its competitors. For the Insurance industry, the median ROC (Joel Greenblatt) % is 74.51 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Aon's current ROC (Joel Greenblatt) % is 249.60%, which is 25% above median its own 10-year median of 199.22. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Aon stock overvalued right now?
Based on GuruFocus' analysis, Aon (MIL:1AON) is currently considered Fairly Valued. The stock's GF Value™ is €338.00, compared to a current price of €311.40 — trading 7.9% below its estimated fair value. The current ROC (Joel Greenblatt) % is 249.60%, which is 25% above median its 10-year median of 199.22 and 235% above the Insurance industry median of 74.51. Aon's overall GF Score™ is 70/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is ROC (Joel Greenblatt) % calculated?
ROC (Joel Greenblatt) % is calculated from a company's financial statements. For Aon (MIL:1AON), the current ROC (Joel Greenblatt) % is 249.60% as of Jun. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Aon (MIL:1AON) Overvalued in 2026?
Based on GuruFocus' analysis, Aon stock appears to be undervalued.
The current stock price of €311.40 is trading 7.9% below its estimated GF Value™ of €338.00.
GuruFocus considers Aon to be Fairly Valued.
Key valuation signals for MIL:1AON:
ROC (Joel Greenblatt) %: 249.60% (25% above median its 10-year median of 199.22)
GF Value™: €338.00 vs. price of €311.40 (7.9% below fair value)
Industry Position: 235% above the Insurance median (#15 of 65)
No single metric tells the full story. See the MIL:1AON stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Aon is a leading global provider of insurance and reinsurance brokerage and human resources solutions. Its operations are tilted toward its brokerage operations. Headquartered in London, Aon has about 60,000 employees and operations in over 120 countries.
70GF Score
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ROC (Joel Greenblatt) % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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