Alpha Pro Tech (STU:APL) Cyclically Adjusted Book per Share: €3.98 (As of Mar. 2026)


STU:APL Alpha Pro Tech Ltd STU:APL
71 GF Score
Price €4.76
GF Value €4.67
Valuation Fairly Valued
! 5 Warning Signs
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What is Alpha Pro Tech Cyclically Adjusted Book per Share?

Alpha Pro Tech STU:APL -0.83% 71 Cyclically Adjusted Book per Share is €3.98 as of Mar. 2026. GuruFocus rates STU:APL with a GF Score™ of 71/100 and a GF Value™ of €4.67 (Fairly Valued). The stock has 5 warning signs investors should review.

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. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

Alpha Pro Tech's adjusted book value per share for the three months ended in Mar. 2026 was €5.380. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is €3.98 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Alpha Pro Tech's average Cyclically Adjusted Book Growth Rate was 11.00% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 11.30% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 13.40% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 11.10% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the Cyclically Adjusted Book Growth Rate using Cyclically Adjusted Book per Share data.

During the past 13 years, the highest 3-Year average Cyclically Adjusted Book Growth Rate of Alpha Pro Tech was 16.70% per year. The lowest was 7.60% per year. And the median was 11.30% per year.

As of today (2026-07-04), Alpha Pro Tech's current stock price is €4.76. Alpha Pro Tech's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was €3.98. Alpha Pro Tech's Cyclically Adjusted PB Ratio of today is 1.20.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Alpha Pro Tech was 9.81. The lowest was 0.98. And the median was 1.66.


Alpha Pro Tech  (STU:APL) Cyclically Adjusted Book per Share Explanation

If a company grows much fast than inflation, Cyclically Adjusted Book per Share may underestimate the company's equity. Cyclically Adjusted PB Ratio can seem to be too high even the actual PB Ratio is low.

For the Cyclically Adjusted PB Ratio, the book value of the past 10 years are inflation-adjusted and averaged. The result is used for P/B calculation. Since it looks at the average over the last 10 years, the Cyclically Adjusted PB Ratio is also called CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.

Alpha Pro Tech's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=4.76/3.98
=1.20

* 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.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Alpha Pro Tech was 9.81. The lowest was 0.98. And the median was 1.66.


Be Aware

Cyclically Adjusted PB Ratio works better for cyclical companies. It gives you a better idea on the company's real book value.


Alpha Pro Tech Cyclically Adjusted Book per Share Related Terms


Alpha Pro Tech Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Alpha Pro Tech's Cyclically Adjusted Book per Share 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.

Alpha Pro Tech Cyclically Adjusted Book per Share Chart

Alpha Pro Tech Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 2.55 2.91 3.16 3.71 3.65

Alpha Pro Tech Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Cyclically Adjusted Book per Share Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 3.76 3.54 3.66 3.65 3.98

STU:APL vs INVE, SNTL, CSTE: Cyclically Adjusted Book per Share Comparison

For the Building Products & Equipment subindustry, Alpha Pro Tech's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted 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.


Alpha Pro Tech Cyclically Adjusted PB Ratio vs Construction Industry

For the Construction industry and Industrials sector, Alpha Pro Tech's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Alpha Pro Tech's Cyclically Adjusted PB Ratio falls into.


STU:APL
71GF Score
Alpha Pro Tech Ltd STU:APL
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Alpha Pro Tech Cyclically Adjusted Book per Share Calculation

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. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

What is Cyclically Adjusted Book per Share? How do we calculate Cyclically Adjusted Book per Share?

Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the Cyclically Adjusted Book per Share of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the book value per share from 2001 through 2010.

We adjusted the 2001 book value per share data with the total inflation from 2001 through 2010 to the equivalent book value in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart's book value is $1 a share in 2001, then the 2001's equivalent book value in 2010 is $1.4 a share. If Wal-Mart's book value is $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 book value in 2010 is $1.35. So on and so forth, you get the equivalent book value per share of past 10 years. Then you add them together and divided the sum by the count to get Cyclically Adjusted Book per Share.

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.

For example, Alpha Pro Tech's adjusted Book Value per Share data for the three months ended in Mar. 2026 was:

Adj_Book= Book Value per Share /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=5.38/132.2600*132.2600
=5.380

Current CPI (Mar. 2026) = 132.2600.

Alpha Pro Tech Quarterly Data

Book Value per Share CPI Adj_Book
201606 1.869 102.002 2.423
201609 1.904 101.765 2.475
201612 2.009 101.449 2.619
201703 1.992 102.634 2.567
201706 1.943 103.029 2.494
201709 1.861 103.345 2.382
201712 1.852 103.345 2.370
201803 1.795 105.004 2.261
201806 1.938 105.557 2.428
201809 2.014 105.636 2.522
201812 2.096 105.399 2.630
201903 2.171 106.979 2.684
201906 2.235 107.690 2.745
201909 2.321 107.611 2.853
201912 2.321 107.769 2.848
202003 2.694 107.927 3.301
202006 3.057 108.401 3.730
202009 3.422 108.164 4.184
202012 3.646 108.559 4.442
202103 3.895 110.298 4.671
202106 3.913 111.720 4.632
202109 4.051 112.905 4.745
202112 4.167 113.774 4.844
202203 4.450 117.646 5.003
202206 4.700 120.806 5.146
202209 5.074 120.648 5.562
202212 4.691 120.964 5.129
202303 4.694 122.702 5.060
202306 4.750 124.203 5.058
202309 4.944 125.230 5.222
202312 4.946 125.072 5.230
202403 4.987 126.258 5.224
202406 5.179 127.522 5.371
202409 5.105 127.285 5.305
202412 5.494 127.364 5.705
202503 5.389 129.181 5.517
202506 5.182 129.892 5.276
202509 5.181 130.290 5.259
202512 5.266 130.370 5.342
202603 5.380 132.260 5.380

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

What does a Cyclically Adjusted Book per Share of €3.98 mean?
Alpha Pro Tech (STU:APL) has a Cyclically Adjusted Book per Share of €3.98 as of Mar. 2026. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Alpha Pro Tech and its competitors.
Is Alpha Pro Tech's Cyclically Adjusted Book per Share too high?
Alpha Pro Tech's current Cyclically Adjusted Book per Share is €3.98. Overall, Alpha Pro Tech has a GF Score™ of 71/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does Alpha Pro Tech's Cyclically Adjusted Book per Share compare to INVE and SNTL?
Alpha Pro Tech's Cyclically Adjusted Book per Share of €3.98 can be compared against companies in the Construction industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted Book per Share for a Construction company?
A good Cyclically Adjusted Book per Share depends on the Construction industry context. However, Cyclically Adjusted Book per Share should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Cyclically Adjusted Book per Share mean?
A high Cyclically Adjusted Book per Share can signal that a stock is expensive relative to its fundamentals. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Alpha Pro Tech and its competitors. Alpha Pro Tech's current Cyclically Adjusted Book per Share is €3.98. 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 (STU:APL) is currently considered Fairly Valued. The stock's GF Value™ is €4.67, compared to a current price of €4.76 — trading 1.9% above its estimated fair value. The current Cyclically Adjusted Book per Share is €3.98. Alpha Pro Tech's overall GF Score™ is 71/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For Alpha Pro Tech (STU:APL), the current Cyclically Adjusted Book per Share is €3.98 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 Alpha Pro Tech (STU:APL) Overvalued in 2026?

Based on GuruFocus' analysis, Alpha Pro Tech stock appears to be overvalued. The current stock price of €4.76 is trading 1.9% above its estimated GF Value™ of €4.67. GuruFocus considers Alpha Pro Tech to be Fairly Valued.

Key valuation signals for STU:APL:

  • Cyclically Adjusted Book per Share: €3.98
  • GF Value™: €4.67 vs. price of €4.76 (1.9% above fair value)
  • GF Score™: 71/100 with 5 warning signs

No single metric tells the full story. See the STU:APL stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Alpha Pro Tech Business Description

Other Exchanges APT:USA
Address 53 Wellington Street East, Aurora, ON, CAN, L4G 1H6
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.
71GF Score

Get the complete analysis for STU:APL

Cyclically Adjusted Book per Share is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€4.76
Price
€4.67
GF Value