GNTX (Gentex) Cyclically Adjusted Book per Share: $10.02 (As of Mar. 2026)


GNTX Gentex Corp GNTX
91 GF Score
Price $24.52
GF Value $35.88
Valuation Significantly Undervalued
! 3 Warning Signs
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What is Gentex Cyclically Adjusted Book per Share?

Gentex GNTX -0.63% 91 Cyclically Adjusted Book per Share is $10.02 as of Mar. 2026. GuruFocus rates GNTX with a GF Score™ of 91/100 and a GF Value™ of $35.88 (Significantly Undervalued). The stock has 3 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.

Gentex's adjusted book value per share for the three months ended in Mar. 2026 was $11.750. 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 $10.02 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Gentex's average Cyclically Adjusted Book Growth Rate was 6.90% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 7.40% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 9.40% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 10.40% 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 Gentex was 29.30% per year. The lowest was 7.00% per year. And the median was 11.10% per year.

As of today (2026-07-06), Gentex's current stock price is $24.52. Gentex's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was $10.02. Gentex's Cyclically Adjusted PB Ratio of today is 2.45.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Gentex was 5.97. The lowest was 2.12. And the median was 4.17.


Gentex  (NAS:GNTX) 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.

Gentex's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=24.52/10.02
=2.45

* 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 Gentex was 5.97. The lowest was 2.12. And the median was 4.17.


Be Aware

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


Gentex Cyclically Adjusted Book per Share Related Terms


Gentex Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Gentex'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.

Gentex Cyclically Adjusted Book per Share Chart

Gentex 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 7.04 7.86 8.52 9.15 9.75

Gentex 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 9.37 9.53 9.69 9.75 10.02

GNTX vs QS, ATMU, GTX: Cyclically Adjusted Book per Share Comparison

For the Auto Parts subindustry, Gentex'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.


Gentex Cyclically Adjusted PB Ratio vs Vehicles & Parts Industry

For the Vehicles & Parts industry and Consumer Cyclical sector, Gentex's Cyclically Adjusted PB Ratio distribution charts can be found below:

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


GNTX
91GF Score
Gentex Corp GNTX
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Gentex 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, Gentex'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)
=11.75/330.2130*330.2130
=11.750

Current CPI (Mar. 2026) = 330.2130.

Gentex Quarterly Data

Book Value per Share CPI Adj_Book
201606 6.224 241.018 8.527
201609 6.479 241.428 8.862
201612 6.639 241.432 9.080
201703 6.872 243.801 9.308
201706 7.018 244.955 9.461
201709 7.137 246.819 9.548
201712 7.312 246.524 9.794
201803 7.200 249.554 9.527
201806 7.145 251.989 9.363
201809 7.032 252.439 9.198
201812 7.179 251.233 9.436
201903 7.266 254.202 9.439
201906 7.474 256.143 9.635
201909 7.595 256.759 9.768
201912 7.713 256.974 9.911
202003 7.492 258.115 9.585
202006 7.416 257.797 9.499
202009 7.735 260.280 9.813
202012 8.059 260.474 10.217
202103 8.119 264.877 10.122
202106 8.019 271.696 9.746
202109 7.980 274.310 9.606
202112 8.196 278.802 9.707
202203 8.227 287.504 9.449
202206 8.449 296.311 9.416
202209 8.670 296.808 9.646
202212 8.822 296.797 9.815
202303 9.084 301.836 9.938
202306 9.407 305.109 10.181
202309 9.725 307.789 10.434
202312 9.991 306.746 10.755
202403 10.273 312.332 10.861
202406 10.426 314.175 10.958
202409 10.630 315.301 11.133
202412 10.862 315.605 11.365
202503 11.008 319.799 11.366
202506 11.070 322.561 11.333
202509 11.396 324.800 11.586
202512 11.547 324.054 11.766
202603 11.750 330.213 11.750

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 $10.02 mean?
Gentex (GNTX) has a Cyclically Adjusted Book per Share of $10.02 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 Gentex and its competitors.
Is Gentex's Cyclically Adjusted Book per Share too high?
Gentex's current Cyclically Adjusted Book per Share is $10.02. Overall, Gentex has a GF Score™ of 91/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Gentex's Cyclically Adjusted Book per Share compare to QS and ATMU?
Gentex's Cyclically Adjusted Book per Share of $10.02 can be compared against companies in the Vehicles & Parts 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 Vehicles & Parts company?
A good Cyclically Adjusted Book per Share depends on the Vehicles & Parts 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 Gentex and its competitors. Gentex's current Cyclically Adjusted Book per Share is $10.02. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Gentex stock overvalued right now?
Based on GuruFocus' analysis, Gentex (GNTX) is currently considered Significantly Undervalued. The stock's GF Value™ is $35.88, compared to a current price of $24.52 — trading 31.7% below its estimated fair value. The current Cyclically Adjusted Book per Share is $10.02. Gentex's overall GF Score™ is 91/100 with 3 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 Gentex (GNTX), the current Cyclically Adjusted Book per Share is $10.02 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 Gentex (GNTX) Overvalued in 2026?

Based on GuruFocus' analysis, Gentex stock appears to be undervalued. The current stock price of $24.52 is trading 31.7% below its estimated GF Value™ of $35.88. GuruFocus considers Gentex to be Significantly Undervalued.

Key valuation signals for GNTX:

  • Cyclically Adjusted Book per Share: $10.02
  • GF Value™: $35.88 vs. price of $24.52 (31.7% below fair value)
  • GF Score™: 91/100 with 3 warning signs

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


Gentex Business Description

Other Exchanges GTX:Germany
Address 600 North Centennial Street, Zeeland, MI, USA, 49464
Gentex was founded in 1974 to produce smoke-detection equipment. The company sold its first glare-control interior mirror in 1982 and its first model using electrochromic technology in 1987. Automotive revenue was about 89% of total revenue in 2025, down from 98% in 2024 due to the Voxx acquisition in April 2025. The company is constantly developing new applications for the technology to remain on top. Sales in 2025 totaled about $2.5 billion with 44.8 million mirrors shipped. The unit mix breaks out as 64% interior and 36% exterior versus 31% exterior in 2019. The company is based in Zeeland, Michigan.
91GF Score

Get the complete analysis for GNTX

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

$24.52
Price
$35.88
GF Value