AonAON +1.48%88 PB Ratio is 7.07 as of Jun. 24, 2026, which is 37% below its 10-year median of 11.29. GuruFocus rates AON with a GF Score™ of 88/100 and a GF Value™ of $397.06 (Modestly Undervalued). The stock has 2 warning signs investors should review. Among 499 Insurance companies, Aon ranks worse than 94.99% on this metric.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. As of today (2026-06-24), Aon's share price is $325.48. Aon's Book Value per Share for the quarter that ended in Mar. 2026 was $46.04. Hence, Aon's PB Ratio of today is 7.07.
Good Sign:
Aon PLC stock PB Ratio (=6.97) is close to 5-year low of 6.77.
The historical rank and industry rank for Aon's PB Ratio or its related term are showing as below:
AON'
s PB Ratio Range Over the Past 10 Years
Min: 5.18 Med: 11.29 Max: 1078.75
Current: 7.07
During the past 13 years, Aon's highest PB Ratio was 1078.75. The lowest was 5.18. And the median was 11.29.
AON's PB Ratio is ranked worse than 94.99% of 499
companies
in the Insurance industry
Industry Median: 1.39
vs AON: 7.07
During the past 12 months, Aon's average Book Value Per Share Growth Rate was 42.00% per year.
During the past 13 years, the highest 3-Year average Book Value Per Share Growth Rate of Aon was 79.00% per year. The lowest was -34.10% per year. And the median was 5.30% per year.
The PB Ratio works the best for the businesses that earn most of their profit from their assets, e.g. banks and insurance companies.
Be Aware
Some businesses have very light assets, such as software companies or insurance agencies. The PB Ratio does not work well for these companies. Some companies even have negative equity, so the PB Ratio cannot be applied to them.
Aon PB Ratio Related Terms
Aon PB Ratio Historical Data
* Premium members only.
The historical data trend for Aon's PB Ratio 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.
For the Insurance Brokers subindustry, Aon's PB Ratio, along with its competitors' market caps and PB Ratio 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 PB Ratio vs Insurance Industry
For the Insurance industry and Financial Services sector, Aon's PB Ratio distribution charts can be found below:
* The bar in red indicates where Aon's PB Ratio falls into.
The PB Ratio, or Price-to-Book ratio, or Price/Book, is a financial ratio used to compare a company's market price to its Book Value per Share. It is a ratio widely used to value stocks.
Aon's PB Ratio for today is calculated as follows:
* 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.
It can also be calculated from the numbers for the whole company:
A closely related ratio is called Price-to-Tangible-Book. The difference between Price-to-Tangible-Book and PB Ratio is that book value other than intangibles are used in the calculation.
Aon (AON) has a PB Ratio of 7.07 as of Jun. 24, 2026. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Aon and its competitors. This is 37% below median its historical median of 11.29. Over the past decade, Aon's PB Ratio has ranged from 5.18 to 1,078.75. According to the industry distribution chart, Aon ranks #474 out of 499 companies in the Insurance industry, placing it in the top 95%.
Is Aon's PB Ratio too high?
Aon's current PB Ratio of 7.07 is 37% below median its 10-year median of 11.29. Over the past 10 years, this metric has ranged from a low of 5.18 to a high of 1,078.75. The Insurance industry median PB Ratio is 1.39. Aon's value of 7.07 is 408.6% above this industry median. Based on the distribution chart, Aon ranks #474 out of 499 companies in the Insurance industry, which is in the bottom quartile relative to peers. Overall, Aon has a GF Score™ of 88/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Aon's PB Ratio compare to MRSH and AJG?
According to the Insurance industry distribution chart, Aon ranks #474 out of 499 companies for PB Ratio. This places Aon in the lower half of its industry. The industry median PB Ratio is 1.39. Aon's value of 7.07 is 408.6% above this benchmark. Historically, Aon's own PB Ratio has ranged from 5.18 to 1,078.75 over the past decade. While the company's 10-year median is 11.29 vs. the industry median of 1.39, 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 PB Ratio for an Insurance company?
The median PB Ratio among Insurance companies is 1.39, based on 499 companies in the industry. Companies in the top quartile (top 25%) have a PB Ratio significantly above this median, while those in the bottom quartile fall well below. However, PB Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Aon's current PB Ratio of 7.07 is 408.6% 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 PB Ratio mean?
A high PB Ratio can signal that a stock is expensive relative to its fundamentals. Price-to-Book ratio is the ratio of share price to a company's book value per share. View historical data on Aon and its competitors. For the Insurance industry, the median PB Ratio is 1.39 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Aon's current PB Ratio is 7.07, which is 37% below median its own 10-year median of 11.29. 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 (AON) is currently considered Modestly Undervalued. The stock's GF Value™ is $397.06, compared to a current price of $325.48 — trading 18% below its estimated fair value. The current PB Ratio is 7.07, which is 37% below median its 10-year median of 11.29 and 408.6% above the Insurance industry median of 1.39. Aon's overall GF Score™ is 88/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is PB Ratio calculated?
PB Ratio is calculated from a company's financial statements. For Aon (AON), the current PB Ratio is 7.07 as of Jun. 24, 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 (AON) Overvalued in 2026?
Based on GuruFocus' analysis, Aon stock appears to be undervalued.
The current stock price of $325.48 is trading 18% below its estimated GF Value™ of $397.06.
GuruFocus considers Aon to be Modestly Undervalued.
Key valuation signals for AON:
PB Ratio: 7.07 (37% below median its 10-year median of 11.29)
GF Value™: $397.06 vs. price of $325.48 (18% below fair value)
Industry Position: 408.6% above the Insurance median (#474 of 499)
No single metric tells the full story. See the AON 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.
88GF Score
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