NPK InternationalNPKI +1.26%63 ROC (Joel Greenblatt) % is 21.53% as of Mar. 2026, which is 508% above its 10-year median of 3.54. GuruFocus rates NPKI with a GF Score™ of 63/100 and a GF Value™ of $10.90 (Significantly Overvalued). The stock has 2 warning signs investors should review. Among 1,778 Construction companies, NPK International ranks worse than 50.28% 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. NPK International's annualized ROC (Joel Greenblatt) % for the quarter that ended in Mar. 2026 was 21.53%.
The historical rank and industry rank for NPK International's ROC (Joel Greenblatt) % or its related term are showing as below:
NPKI'
s ROC (Joel Greenblatt) % Range Over the Past 10 Years
Min: -14.2 Med: 3.54 Max: 19.64
Current: 19.34
During the past 13 years, NPK International's highest ROC (Joel Greenblatt) % was 19.64%. The lowest was -14.20%. And the median was 3.54%.
NPKI's ROC (Joel Greenblatt) % is ranked worse than 50.28% of 1778
companies
in the Construction industry
Industry Median: 19.425
vs NPKI: 19.34
NPK International's 5-Year average Growth Rate of ROC (Joel Greenblatt) % was 0.00% per year.
NPK International (NYSE:NPKI) 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.
NPK International ROC (Joel Greenblatt) % Related Terms
NPK International ROC (Joel Greenblatt) % Historical Data
* Premium members only.
The historical data trend for NPK International'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.
NPKI vs ROCK, ARLO, APOG: ROC (Joel Greenblatt) % Comparison
For the Building Products & Equipment subindustry, NPK International'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.
NPK International ROC (Joel Greenblatt) % vs Construction Industry
For the Construction industry and Industrials sector, NPK International's ROC (Joel Greenblatt) % distribution charts can be found below:
* The bar in red indicates where NPK International's ROC (Joel Greenblatt) % falls into.
NPK International ROC (Joel Greenblatt) % Calculation
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 (Mar. 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 21.53% mean?
NPK International (NPKI) has a ROC (Joel Greenblatt) % of 21.53% as of Mar. 2026. Joel Greenblatt's return on capital is the ratio of EBIT to average fixed assets and net working capital. View historical data on NPK International and its competitors. This is 508% above median its historical median of 3.54. According to the industry distribution chart, NPK International ranks #894 out of 1778 companies in the Construction industry, placing it in the top 50.3%.
Is NPK International's ROC (Joel Greenblatt) % too high?
NPK International's current ROC (Joel Greenblatt) % of 21.53% is 508% above median its 10-year median of 3.54. The Construction industry median ROC (Joel Greenblatt) % is 19.43. NPK International's value of 21.53% is 10.8% above this industry median. Based on the distribution chart, NPK International ranks #894 out of 1778 companies in the Construction industry, which is below the industry midpoint. Overall, NPK International has a GF Score™ of 63/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does NPK International's ROC (Joel Greenblatt) % compare to ROCK and ARLO?
According to the Construction industry distribution chart, NPK International ranks #894 out of 1778 companies for ROC (Joel Greenblatt) %. This places NPK International in the lower half of its industry. The industry median ROC (Joel Greenblatt) % is 19.43. NPK International's value of 21.53% is 10.8% above this benchmark. While the company's 10-year median is 3.54 vs. the industry median of 19.43, NPK International 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 Construction company?
The median ROC (Joel Greenblatt) % among Construction companies is 19.43, based on 1,778 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. NPK International's current ROC (Joel Greenblatt) % of 21.53% is 10.8% 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 NPK International and its competitors. For the Construction industry, the median ROC (Joel Greenblatt) % is 19.43 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. NPK International's current ROC (Joel Greenblatt) % is 21.53%, which is 508% above median its own 10-year median of 3.54. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is NPK International stock overvalued right now?
Based on GuruFocus' analysis, NPK International (NPKI) is currently considered Significantly Overvalued. The stock's GF Value™ is $10.90, compared to a current price of $14.43 — trading 32.4% above its estimated fair value. The current ROC (Joel Greenblatt) % is 21.53%, which is 508% above median its 10-year median of 3.54 and 10.8% above the Construction industry median of 19.43. NPK International's overall GF Score™ is 63/100 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 NPK International (NPKI), the current ROC (Joel Greenblatt) % is 21.53% as of Mar. 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 NPK International (NPKI) Overvalued in 2026?
Based on GuruFocus' analysis, NPK International stock appears to be overvalued.
The current stock price of $14.43 is trading 32.4% above its estimated GF Value™ of $10.90.
GuruFocus considers NPK International to be Significantly Overvalued.
Key valuation signals for NPKI:
ROC (Joel Greenblatt) %: 21.53% (508% above median its 10-year median of 3.54)
GF Value™: $10.90 vs. price of $14.43 (32.4% above fair value)
Industry Position: 10.8% above the Construction median (#894 of 1778)
No single metric tells the full story. See the NPKI stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
NPK International Inc is a temporary worksite access solutions company that manufactures, sells, and rents recyclable composite matting products, along with a full suite of services, including planning, logistics, and site restoration. The company generates majority of revenue from the rental of recyclable composite matting systems, along with related site construction and services to customers in various markets including power transmission, oil and natural gas exploration and production, pipeline, renewable energy, petrochemical, construction and other industries within the United States and United Kingdom. It generates maximum revenue from United States.
63GF Score
Get the complete analysis for NPKI
ROC (Joel Greenblatt) % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
NPKI has been successfully added to your 
