GentexGNTX +1.17%95 Operating Margin % is 18.83% as of Mar. 2026, which is 20% below its 10-year median of 23.67. GuruFocus rates GNTX with a GF Score™ of 95/100 and a GF Value™ of $35.81 (Significantly Undervalued). The stock has 3 warning signs investors should review. Among 1,325 Vehicles & Parts companies, Gentex ranks better than 94.79% on this metric.
Operating Margin % is calculated as Operating Income divided by its Revenue. Gentex's Operating Income for the
three
months ended in Mar. 2026 was $127 Mil. Gentex's Revenue for the
three
months ended in Mar. 2026 was $675 Mil. Therefore, Gentex's Operating Margin % for the quarter that ended in Mar. 2026 was 18.83%.
Warning Sign:
Gentex Corp operating margin has been in a 5-year decline. The average rate of decline per year is -4%.
The historical rank and industry rank for Gentex's Operating Margin % or its related term are showing as below:
GNTX'
s Operating Margin % Range Over the Past 10 Years
Min: 18.87 Med: 23.67 Max: 30.48
Current: 18.87
GNTX's Operating Margin % is ranked better than 94.79% of 1325
companies
in the Vehicles & Parts industry
Industry Median: 4.86
vs GNTX: 18.87
Gentex's 5-Year Average Operating Margin % Growth Rate was -4.00% per year.
Gentex's Operating Income for the
three
months ended in Mar. 2026 was $127 Mil.
Its Operating Income for the trailing twelve months (TTM) ended in Mar. 2026 was $497 Mil.
Gentex (NAS:GNTX) Operating Margin % Explanation
Just like Gross Margin %, it is important to see a company maintains its operating margin over time. Among the same industry, a company with higher operating margin is more efficient in its operation. It is also more stable during industry slowdown or recessions. Peter Lynch prefers those with higher margins than those with lower margins.
Be Aware
Operating Margin % can be manipulated by adjusting the rate of depreciation, depletion and amortization (DDA).
If a company is facing competition, its Operating Margin % may decline. Often the Operating Margin % declines well before the company's Revenue or even profit decline. Therefore, Operating Margin % is a very important indicator of whether the company is facing problems.
For instance, by 2012, Nokia (NOK)'s problems were well known and its stock had lost more than 90% of its market value since 2007. But Nokias Operating Margin % had already been in decline since 2002, although its Earnings per Share (Diluted) were still rising. Investors who paid attention to Operating Margin % would have avoided this huge loss. The same can be said for Research-in-Motion (RIMM).
Therefore, Operating Margin % is a very important screening filter for GuruFocus. GuruFocus's Buffett-Munger screener requires that the profit margin is either consistent or expanding. The Model Portfolio of the Buffett-Munger screener has outperformed the market every year since inception in 2009.
Gentex Operating Margin % Related Terms
Gentex Operating Margin % Historical Data
* Premium members only.
The historical data trend for Gentex's Operating Margin % 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.
GNTX vs QS, GTX, DAN: Operating Margin % Comparison
For the Auto Parts subindustry, Gentex's Operating Margin %, along with its competitors' market caps and Operating Margin % 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 Operating Margin % vs Vehicles & Parts Industry
For the Vehicles & Parts industry and Consumer Cyclical sector, Gentex's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Gentex's Operating Margin % falls into.
Operating Margin % - also known as operating income margin, operating profit margin and return on sales (ROS) - is the ratio of Operating Income divided by net sales or Revenue, usually presented in percent.
Gentex's Operating Margin % for the fiscal year that ended in Dec. 2025 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.
Gentex (GNTX) has a Operating Margin % of 18.83% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on Gentex and its competitors. This is 20% below median its historical median of 23.67. Over the past decade, Gentex's Operating Margin % has ranged from 18.87 to 30.48. According to the industry distribution chart, Gentex ranks #69 out of 1325 companies in the Vehicles & Parts industry, placing it in the top 5.2%.
Is Gentex's Operating Margin % too high?
Gentex's current Operating Margin % of 18.83% is 20% below median its 10-year median of 23.67. Over the past 10 years, this metric has ranged from a low of 18.87 to a high of 30.48. The Vehicles & Parts industry median Operating Margin % is 4.86. Gentex's value of 18.83% is 287.4% above this industry median. Based on the distribution chart, Gentex ranks #69 out of 1325 companies in the Vehicles & Parts industry, which is in the top quartile — a strong position relative to peers. Overall, Gentex has a GF Score™ of 95/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Gentex's Operating Margin % compare to QS and GTX?
According to the Vehicles & Parts industry distribution chart, Gentex ranks #69 out of 1325 companies for Operating Margin %. This places Gentex in the top 5% of its industry — outperforming the majority of peers. The industry median Operating Margin % is 4.86. Gentex's value of 18.83% is 287.4% above this benchmark. Historically, Gentex's own Operating Margin % has ranged from 18.87 to 30.48 over the past decade. While the company's 10-year median is 23.67 vs. the industry median of 4.86, Gentex 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 Operating Margin % for a Vehicles & Parts company?
The median Operating Margin % among Vehicles & Parts companies is 4.86, based on 1,325 companies in the industry. Companies in the top quartile (top 25%) have a Operating Margin % significantly above this median, while those in the bottom quartile fall well below. However, Operating Margin % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Gentex's current Operating Margin % of 18.83% is 287.4% 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 Operating Margin % mean?
A high Operating Margin % can signal that a stock is expensive relative to its fundamentals. Operating margin is the ratio of total operating income to net sales. View historical data on Gentex and its competitors. For the Vehicles & Parts industry, the median Operating Margin % is 4.86 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Gentex's current Operating Margin % is 18.83%, which is 20% below median its own 10-year median of 23.67. 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 $35.81, compared to a current price of $25.04 — trading 30.1% below its estimated fair value. The current Operating Margin % is 18.83%, which is 20% below median its 10-year median of 23.67 and 287.4% above the Vehicles & Parts industry median of 4.86. Gentex's overall GF Score™ is 95/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Operating Margin % calculated?
Operating Margin % is calculated from a company's financial statements. For Gentex (GNTX), the current Operating Margin % is 18.83% 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 $25.04 is trading 30.1% below its estimated GF Value™ of $35.81.
GuruFocus considers Gentex to be Significantly Undervalued.
Key valuation signals for GNTX:
Operating Margin %: 18.83% (20% below median its 10-year median of 23.67)
GF Value™: $35.81 vs. price of $25.04 (30.1% below fair value)
Industry Position: 287.4% above the Vehicles & Parts median (#69 of 1325)
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 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.
95GF Score
Get the complete analysis for GNTX
Operating Margin % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
GNTX has been successfully added to your 
