Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
Alpha Pro TechAPT +0.19%72 Shiller PE Ratio is 9.16 as of Aug. 25, 2026, which is 51% below its 10-year median of 18.76. GuruFocus rates APT with a GF Score™ of 72/100 and a GF Value™ of $5.66 (Fairly Valued). The stock has 4 warning signs investors should review. Among 1,042 Construction companies, Alpha Pro Tech ranks better than 77.35% on this metric.
As of today (2026-08-25), Alpha Pro Tech's current share price is $5.22. Alpha Pro Tech's E10 for the quarter that ended in Jun. 2026 was $0.57. Alpha Pro Tech's Shiller PE Ratio for today is 9.16.
The historical rank and industry rank for Alpha Pro Tech's Shiller PE Ratio or its related term are showing as below:
APT'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 8.07 Med: 18.76 Max: 140
Current: 9.22
During the past years, Alpha Pro Tech's highest Shiller PE Ratio was 140.00. The lowest was 8.07. And the median was 18.76.
APT's Shiller PE Ratio is ranked better than 77.35% of 1042
companies
in the Construction industry
Industry Median: 16.855
vs APT: 9.22
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
Alpha Pro Tech's adjusted earnings per share data for the three months ended in Jun. 2026 was $0.180. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $0.57 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Alpha Pro Tech (AMEX:APT) Shiller PE Ratio Explanation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Alpha Pro Tech Shiller PE Ratio Related Terms
Alpha Pro Tech Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Alpha Pro Tech's Shiller PE 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.
APT vs SNTL, INVE, CSTE: Shiller PE Ratio Comparison
For the Building Products & Equipment subindustry, Alpha Pro Tech's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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.
Alpha Pro Tech Shiller PE Ratio vs Construction Industry
For the Construction industry and Industrials sector, Alpha Pro Tech's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Alpha Pro Tech's Shiller PE Ratio falls into.
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
Alpha Pro Tech's Shiller PE Ratio for today is calculated as
* 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.
Alpha Pro Tech's E10 for the quarter that ended in Jun. 2026 is calculated as:
For example, Alpha Pro Tech's adjusted earnings per share data for the three months ended in Jun. 2026 was:
Add all the adjusted EPS together and divide 10 will get our E10.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
Alpha Pro Tech (APT) has a Shiller PE Ratio of 9.16 as of Aug. 25, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Alpha Pro Tech and its competitors. This is 51% below median its historical median of 18.76. Over the past decade, Alpha Pro Tech's Shiller PE Ratio has ranged from 8.07 to 140.00. According to the industry distribution chart, Alpha Pro Tech ranks #236 out of 1042 companies in the Construction industry, placing it in the top 22.6%.
Is Alpha Pro Tech's Shiller PE Ratio too high?
Alpha Pro Tech's current Shiller PE Ratio of 9.16 is 51% below median its 10-year median of 18.76. Over the past 10 years, this metric has ranged from a low of 8.07 to a high of 140.00. The Construction industry median Shiller PE Ratio is 16.86. Alpha Pro Tech's value of 9.16 is 45.7% below this industry median. Based on the distribution chart, Alpha Pro Tech ranks #236 out of 1042 companies in the Construction industry, which is in the top quartile — a strong position relative to peers. Overall, Alpha Pro Tech has a GF Score™ of 72/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Alpha Pro Tech's Shiller PE Ratio compare to SNTL and INVE?
According to the Construction industry distribution chart, Alpha Pro Tech ranks #236 out of 1042 companies for Shiller PE Ratio. This places Alpha Pro Tech in the top 23% of its industry — outperforming the majority of peers. The industry median Shiller PE Ratio is 16.86. Alpha Pro Tech's value of 9.16 is 45.7% below this benchmark. Historically, Alpha Pro Tech's own Shiller PE Ratio has ranged from 8.07 to 140.00 over the past decade. While the company's 10-year median is 18.76 vs. the industry median of 16.86, Alpha Pro Tech has consistently been below 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 Shiller PE Ratio for a Construction company?
The median Shiller PE Ratio among Construction companies is 16.86, based on 1,042 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Alpha Pro Tech's current Shiller PE Ratio of 9.16 is 45.7% below 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 Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Alpha Pro Tech and its competitors. For the Construction industry, the median Shiller PE Ratio is 16.86 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Alpha Pro Tech's current Shiller PE Ratio is 9.16, which is 51% below median its own 10-year median of 18.76. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Alpha Pro Tech stock overvalued right now?
Based on GuruFocus' analysis, Alpha Pro Tech (APT) is currently considered Fairly Valued. The stock's GF Value™ is $5.66, compared to a current price of $5.22 — trading 7.8% below its estimated fair value. The current Shiller PE Ratio is 9.16, which is 51% below median its 10-year median of 18.76 and 45.7% below the Construction industry median of 16.86. Alpha Pro Tech's overall GF Score™ is 72/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Alpha Pro Tech (APT), the current Shiller PE Ratio is 9.16 as of Aug. 25, 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 Alpha Pro Tech (APT) Overvalued in 2026?
Based on GuruFocus' analysis, Alpha Pro Tech stock appears to be undervalued.
The current stock price of $5.22 is trading 7.8% below its estimated GF Value™ of $5.66.
GuruFocus considers Alpha Pro Tech to be Fairly Valued.
Key valuation signals for APT:
Shiller PE Ratio: 9.16 (51% below median its 10-year median of 18.76)
GF Value™: $5.66 vs. price of $5.22 (7.8% below fair value)
Industry Position: 45.7% below the Construction median (#236 of 1042)
No single metric tells the full story. See the APT stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Alpha Pro Tech Ltd is in the business of protecting people, products, and environments. It is developing, manufacturing, and marketing a line of disposable protective apparel and infection control products for the cleanroom, industrial, pharmaceutical, medical, and dental markets. It also manufactures a line of building supply construction weatherization products that are sold under the Alpha Pro Tech brand name. The Company operates through two business segments: Building Supply and Disposable Protective Apparel. Key revenue is generated from Building Supply, consisting of a line of construction supply weatherization products. The construction supply weatherization products consist of housewrap and synthetic roof underlayment, and synthetic roof underlayment accessories.
72GF Score
Get the complete analysis for APT
Shiller PE Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
APT has been successfully added to your 
