Grammer AGSTU:GMM +0.57%77 Piotroski F-Score is 5 as of Jun. 26, 2026, which is at its 10-year median of 5.00. GuruFocus rates STU:GMM with a GF Score™ of 77/100 and a GF Value™ of €7.83 (Modestly Overvalued). The stock has 8 warning signs investors should review. Among 1,287 Vehicles & Parts companies, Grammer AG ranks better than 52.37% on this metric.
The zones of discrimination were as such:
Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Grammer AG has an F-score of 5 indicating the company's financial situation is typical for a stable company.
The historical rank and industry rank for Grammer AG's Piotroski F-Score or its related term are showing as below:
STU:GMM'
s Piotroski F-Score Range Over the Past 10 Years
Min: 1 Med: 5 Max: 9
Current: 5
During the past 13 years, the highest Piotroski F-Score of Grammer AG was 9. The lowest was 1. And the median was 5.
Grammer AG (STU:GMM) Piotroski F-Score Explanation
The developer of the system is Joseph D. Piotroski is relatively unknown accounting professor who shuns publicity and rarely gives interviews.
He graduated from the University of Illinois with a B.S. in accounting in 1989, received an M.B.A. from Indiana University in 1994. Five years later, in 1999, after earning a Ph.D. in accounting from the University of Michigan, he became an associate professor of accounting at the University of Chicago.
He wanted to see if he can develop a system (using a simple nine-point scoring system) that can increase the returns of a strategy of investing in low price to book (referred to in the paper as high book to market) value companies.
What he found was something that exceeded his most optimistic expectations.
Buying only those companies that scored highest (8 or 9) on his nine-point scale, or F-Score as he called it, over the 20 year period from 1976 to 1996 led to an average out-performance over the market of 13.4%.
Even more impressive were the results of a strategy of investing in the highest F-Score companies (8 or 9) and shorting companies with the lowest F-Score (0 or 1).
Over the same period from 1976 to 1996 (20 years) this strategy led to an average yearly return of 23%, substantially outperforming the average S&P 500 index return of 15.83% over the same period.
Grammer AG Piotroski F-Score Related Terms
Grammer AG Piotroski F-Score Historical Data
* Premium members only.
The historical data trend for Grammer AG's Piotroski F-Score 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.
STU:GMM vs ORLY, AZO: Piotroski F-Score Comparison
For the Auto Parts subindustry, Grammer AG's Piotroski F-Score, along with its competitors' market caps and Piotroski F-Score 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.
Grammer AG Piotroski F-Score vs Vehicles & Parts Industry
For the Vehicles & Parts industry and Consumer Cyclical sector, Grammer AG's Piotroski F-Score distribution charts can be found below:
* The bar in red indicates where Grammer AG's Piotroski F-Score falls into.
* 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.
*Note: If the latest quarterly/semi-annual/annual total assets data is 0, then we will use previous quarterly/semi-annual/annual data for all the items in the balance sheet.
Profitability
Question 1. Return on Assets (ROA)
Net income before extraordinary items for the year divided by Total Assets at the beginning of the year.
Score 1 if positive, 0 if negative.
Grammer AG's current Net Income (TTM) was 24.
==> Positive ==> Score 1.
Question 2. Cash Flow Return on Assets (CFROA)
Net cash flow from operating activities (operating cash flow) divided by Total Assets at the beginning of the year.
Grammer AG's return on assets of this year was 0.01458119. Grammer AG's return on assets of last year was -0.04771876.
==> This year is higher. ==> Score 1.
Question 4. Quality of Earnings (Accrual)
Compare Cash flow return on assets (2) to return on assets (1)
Grammer AG's current ratio of this year was 1.11751422. Grammer AG's current ratio of last year was 1.15911818.
==> Last year's current ratio is higher ==> Score 0.
Question 7. Change in Shares in Issue
Compare the number of shares in issue this year, to the number in issue last year.
Score 0 if there is larger number of shares in issue this year, 1 otherwise.
Grammer AG's number of shares in issue this year was 14.984. Grammer AG's number of shares in issue last year was 15.
==> There is smaller number of shares in issue this year, or the same. ==> Score 1.
Efficiency
Question 8. Change in Gross Margin
Compare this year's gross margin (Gross Profit divided by sales) to last year's.
Score 1 if this year's gross margin is higher, 0 if it's lower.
Grammer AG's gross margin of this year was 0.11494109. Grammer AG's gross margin of last year was 0.10506019.
==> This year's gross margin is higher. ==> Score 1.
Question 9. Change in asset turnover
Compare this year's asset turnover (total sales for the year divided by total assets at the beginning of the year) to last year's asset turnover ratio.
Score 1 if this year's asset turnover ratio is higher, 0 if it's lower
Grammer AG's asset turnover of this year was 1.09465336. Grammer AG's asset turnover of last year was 1.18647962.
==> Last year's asset turnover is higher ==> Score 0.
Evaluation
Piotroski F-Score
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Good or high score = 7, 8, 9
Bad or low score = 0, 1, 2, 3
Grammer AG has an F-score of 5 indicating the company's financial situation is typical for a stable company.
Grammer AG (STU:GMM) has a Piotroski F-Score of 5 as of Jun. 26, 2026. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Grammer AG and its competitors. This is near median its historical median of 5.00. Over the past decade, Grammer AG's Piotroski F-Score has ranged from 1.00 to 9.00. According to the industry distribution chart, Grammer AG ranks #613 out of 1287 companies in the Vehicles & Parts industry, placing it in the top 47.6%.
Is Grammer AG's Piotroski F-Score too high?
Grammer AG's current Piotroski F-Score of 5 is near median its 10-year median of 5.00. Over the past 10 years, this metric has ranged from a low of 1.00 to a high of 9.00. The Vehicles & Parts industry median Piotroski F-Score is 5.00. Grammer AG's value of 5 is 0% at this industry median. Based on the distribution chart, Grammer AG ranks #613 out of 1287 companies in the Vehicles & Parts industry, which is above the industry midpoint. Overall, Grammer AG has a GF Score™ of 77/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Grammer AG's Piotroski F-Score compare to ORLY and AZO?
According to the Vehicles & Parts industry distribution chart, Grammer AG ranks #613 out of 1287 companies for Piotroski F-Score. This puts Grammer AG in the upper half of its industry. The industry median Piotroski F-Score is 5.00. Grammer AG's value of 5 is 0% at this benchmark. Historically, Grammer AG's own Piotroski F-Score has ranged from 1.00 to 9.00 over the past decade. While the company's 10-year median is 5.00 vs. the industry median of 5.00, Grammer AG has consistently been at 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 Piotroski F-Score for a Vehicles & Parts company?
The median Piotroski F-Score among Vehicles & Parts companies is 5.00, based on 1,287 companies in the industry. Companies in the top quartile (top 25%) have a Piotroski F-Score significantly above this median, while those in the bottom quartile fall well below. However, Piotroski F-Score should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Grammer AG's current Piotroski F-Score of 5 is 0% at 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 Piotroski F-Score mean?
A high Piotroski F-Score can signal that a stock is expensive relative to its fundamentals. The Piotroski F-score grades a company's business operating strength from 0-9. View historical data on Grammer AG and its competitors. For the Vehicles & Parts industry, the median Piotroski F-Score is 5.00 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Grammer AG's current Piotroski F-Score is 5, which is near median its own 10-year median of 5.00. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Grammer AG stock overvalued right now?
Based on GuruFocus' analysis, Grammer AG (STU:GMM) is currently considered Modestly Overvalued. The stock's GF Value™ is €7.83, compared to a current price of €8.85 — trading 13% above its estimated fair value. The current Piotroski F-Score is 5, which is near median its 10-year median of 5.00 and 0% at the Vehicles & Parts industry median of 5.00. Grammer AG's overall GF Score™ is 77/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Piotroski F-Score calculated?
Piotroski F-Score is calculated from a company's financial statements. For Grammer AG (STU:GMM), the current Piotroski F-Score is 5 as of Jun. 26, 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 Grammer AG (STU:GMM) Overvalued in 2026?
Based on GuruFocus' analysis, Grammer AG stock appears to be overvalued.
The current stock price of €8.85 is trading 13% above its estimated GF Value™ of €7.83.
GuruFocus considers Grammer AG to be Modestly Overvalued.
Key valuation signals for STU:GMM:
Piotroski F-Score: 5 (near median its 10-year median of 5.00)
GF Value™: €7.83 vs. price of €8.85 (13% above fair value)
Industry Position: 0% at the Vehicles & Parts median (#613 of 1287)
No single metric tells the full story. See the STU:GMM stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Grammer AG specializes in developing and manufacturing components and systems for car interiors as well as driver and passenger seats for off-road vehicles, trucks, buses, and trains. Its product portfolio comprises consoles and armrests, headrests, and other interior products for cars, as well as passenger seats, interior components, and related spare parts for commercial vehicles, among others. The company has three reportable segments: EMEA, Americas, and APAC. The majority of its revenue is generated from the EMEA segment (Europe, Middle East, and Africa).
77GF Score
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