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AZZSTU:AI7 +0.79%84 ROC (Joel Greenblatt) % is 42.58% as of May. 2026, which is 64% above its 10-year median of 25.98. GuruFocus rates STU:AI7 with a GF Score™ of 84/100 and a GF Value™ of €74.34 (Significantly Overvalued). The stock has 6 warning signs investors should review. Among 1,083 Business Services companies, AZZ ranks better than 67.31% 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. AZZ's annualized ROC (Joel Greenblatt) % for the quarter that ended in May. 2026 was 42.58%.
The historical rank and industry rank for AZZ's ROC (Joel Greenblatt) % or its related term are showing as below:
STU:AI7'
s ROC (Joel Greenblatt) % Range Over the Past 10 Years
Min: 12.79 Med: 25.98 Max: 69.57
Current: 44.73
During the past 13 years, AZZ's highest ROC (Joel Greenblatt) % was 69.57%. The lowest was 12.79%. And the median was 25.98%.
STU:AI7's ROC (Joel Greenblatt) % is ranked better than 67.31% of 1083
companies
in the Business Services industry
Industry Median: 21.22
vs STU:AI7: 44.73
AZZ's 5-Year average Growth Rate of ROC (Joel Greenblatt) % was 34.40% per year.
AZZ (STU:AI7) 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 AZZ'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.
STU:AI7 vs UNF, AMTM, DLB: ROC (Joel Greenblatt) % Comparison
For the Specialty Business Services subindustry, AZZ'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.
AZZ ROC (Joel Greenblatt) % vs Business Services Industry
For the Business Services industry and Industrials sector, AZZ's ROC (Joel Greenblatt) % distribution charts can be found below:
* The bar in red indicates where AZZ'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 (May. 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 42.58% mean?
AZZ (STU:AI7) has a ROC (Joel Greenblatt) % of 42.58% as of May. 2026. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on AZZ and its competitors. This is 64% above median its historical median of 25.98. Over the past decade, AZZ's ROC (Joel Greenblatt) % has ranged from 12.79 to 69.57. According to the industry distribution chart, AZZ ranks #354 out of 1083 companies in the Business Services industry, placing it in the top 32.7%.
Is AZZ's ROC (Joel Greenblatt) % too high?
AZZ's current ROC (Joel Greenblatt) % of 42.58% is 64% above median its 10-year median of 25.98. Over the past 10 years, this metric has ranged from a low of 12.79 to a high of 69.57. The Business Services industry median ROC (Joel Greenblatt) % is 21.22. AZZ's value of 42.58% is 100.7% above this industry median. Based on the distribution chart, AZZ ranks #354 out of 1083 companies in the Business Services industry, which is above the industry midpoint. Overall, AZZ has a GF Score™ of 84/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does AZZ's ROC (Joel Greenblatt) % compare to UNF and AMTM?
According to the Business Services industry distribution chart, AZZ ranks #354 out of 1083 companies for ROC (Joel Greenblatt) %. This puts AZZ in the upper half of its industry. The industry median ROC (Joel Greenblatt) % is 21.22. AZZ's value of 42.58% is 100.7% above this benchmark. Historically, AZZ's own ROC (Joel Greenblatt) % has ranged from 12.79 to 69.57 over the past decade. While the company's 10-year median is 25.98 vs. the industry median of 21.22, AZZ 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 a Business Services company?
The median ROC (Joel Greenblatt) % among Business Services companies is 21.22, based on 1,083 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. AZZ's current ROC (Joel Greenblatt) % of 42.58% is 100.7% 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 AZZ and its competitors. For the Business Services industry, the median ROC (Joel Greenblatt) % is 21.22 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. AZZ's current ROC (Joel Greenblatt) % is 42.58%, which is 64% above median its own 10-year median of 25.98. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is AZZ stock overvalued right now?
Based on GuruFocus' analysis, AZZ (STU:AI7) is currently considered Significantly Overvalued. The stock's GF Value™ is €74.34, compared to a current price of €128.00 — trading 72.2% above its estimated fair value. The current ROC (Joel Greenblatt) % is 42.58%, which is 64% above median its 10-year median of 25.98 and 100.7% above the Business Services industry median of 21.22. AZZ's overall GF Score™ is 84/100 with 6 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 AZZ (STU:AI7), the current ROC (Joel Greenblatt) % is 42.58% as of May. 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 AZZ (STU:AI7) Overvalued in 2026?
Based on GuruFocus' analysis, AZZ stock appears to be overvalued.
The current stock price of €128.00 is trading 72.2% above its estimated GF Value™ of €74.34.
GuruFocus considers AZZ to be Significantly Overvalued.
Key valuation signals for STU:AI7:
ROC (Joel Greenblatt) %: 42.58% (64% above median its 10-year median of 25.98)
GF Value™: €74.34 vs. price of €128.00 (72.2% above fair value)
Industry Position: 100.7% above the Business Services median (#354 of 1083)
No single metric tells the full story. See the STU:AI7 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
AZZ Inc is a provider of galvanizing and coil coating solutions to a broad range of end markets in North America. The company's operating segment consists of AZZ Metal Coatings, AZZ Precoat Metals, and AZZ Infrastructure Solutions. The company generates the majority of its revenue from the Precoat Metals segment, which provides coil coating application of protective and decorative coatings and related value-added downstream processing for steel and aluminum coils. Geographically, the company operates in the United States and Canada.
84GF Score
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