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Bio-Gate AGSTU:BIG 30 ROE % is -53.82% as of Dec. 2025. GuruFocus rates STU:BIG with a GF Score™ of 30/100. The stock has 7 warning signs investors should review. Among 798 Medical Devices & Instruments companies, Bio-Gate AG ranks worse than 87.97% on this metric.
ROE % is calculated as Net Income divided by its average Total Stockholders Equity over a certain period of time. Bio-Gate AG's annualized net income for the quarter that ended in Dec. 2025 was €-0.66 Mil. Bio-Gate AG's average Total Stockholders Equity over the quarter that ended in Dec. 2025 was €1.22 Mil. Therefore, Bio-Gate AG's annualized ROE % for the quarter that ended in Dec. 2025 was -53.82%.
The historical rank and industry rank for Bio-Gate AG's ROE % or its related term are showing as below:
STU:BIG'
s ROE % Range Over the Past 10 Years
Min: -83.35 Med: -44.67 Max: -2.82
Current: -83.35
During the past 13 years, Bio-Gate AG's highest ROE % was -2.82%. The lowest was -83.35%. And the median was -44.67%.
STU:BIG's ROE % is ranked worse than 87.97% of 798
companies
in the Medical Devices & Instruments industry
Industry Median: 2.43
vs STU:BIG: -83.35
ROE % measures the rate of return on the ownership interest (shareholder's equity) of the common stock owners. It measures a firm's efficiency at generating profits from every unit of shareholders' equity (also known as net assets or assets minus liabilities). ROE % shows how well a company uses investment funds to generate earnings growth. ROE %s between 15% and 20% are considered desirable.
The factors that affect a company's ROE % can be illustrated with the three-step DuPont Analysis:
Note:
The net income data used here is two times the semi-annual (Dec. 2025) net income data. The Revenue data used here is two times the semi-annual (Dec. 2025) revenue data. The same rule applies to Pre-Tax Income and Operating Income.
* In the five-step DuPont Analysis, Operating Income is only available for non-financial companies. Thus, for Insurance companies, we use EBIT as a substitution of Operating Income. For Banks, both Operating Income and EBIT is unavailable. Thus we combined Interest Burden and Operating Margin % into Pretax Margin %, and the DuPont Analysis is divided into four components instead.
* 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.
Be Aware
Net Income is used.
Because a company can increase its ROE % by having more financial leverage, it is important to watch the equity multiplier when investing in high ROE % companies. Like ROA %, ROE % is calculated with only 12 months data. Fluctuations in company's earnings or business cycles can affect the ratio drastically. It is important to look at the ratio from a long term perspective.
Asset light businesses require very few assets to generate very high earnings. Their ROE %s can be extremely high.
Bio-Gate AG ROE % Related Terms
Bio-Gate AG ROE % Historical Data
* Premium members only.
The historical data trend for Bio-Gate AG's ROE % 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.
For the Medical Instruments & Supplies subindustry, Bio-Gate AG's ROE %, along with its competitors' market caps and ROE % 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.
Bio-Gate AG ROE % vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Bio-Gate AG's ROE % distribution charts can be found below:
* The bar in red indicates where Bio-Gate AG's ROE % 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.
In the calculation of annual ROE %, the net income of the last fiscal year and the average total shareholder equity over the fiscal year are used. In calculating the quarterly data,
the net income data used here is two times the semi-annual (Dec. 2025) net income data.
ROE % is displayed in the 30-year financial page.
Bio-Gate AG (STU:BIG) has a ROE % of -53.82% as of Dec. 2025. Return on equity is the ratio of current-period net income to average two-period total equity. View historical data on Bio-Gate AG and its competitors. According to the industry distribution chart, Bio-Gate AG ranks #702 out of 798 companies in the Medical Devices & Instruments industry, placing it in the top 88%.
Is Bio-Gate AG's ROE % too high?
Bio-Gate AG's current ROE % is -53.82%. Based on the distribution chart, Bio-Gate AG ranks #702 out of 798 companies in the Medical Devices & Instruments industry, which is in the bottom quartile relative to peers. Overall, Bio-Gate AG has a GF Score™ of 30/100, reflecting its overall financial health beyond just this single metric.
How does Bio-Gate AG's ROE % compare to ISRG and BDX?
According to the Medical Devices & Instruments industry distribution chart, Bio-Gate AG ranks #702 out of 798 companies for ROE %. This places Bio-Gate AG in the lower half of its industry. The industry median ROE % is 2.43. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good ROE % for a Medical Devices & Instruments company?
The median ROE % among Medical Devices & Instruments companies is 2.43, based on 798 companies in the industry. Companies in the top quartile (top 25%) have a ROE % significantly above this median, while those in the bottom quartile fall well below. However, ROE % 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 ROE % mean?
A high ROE % can signal that a stock is expensive relative to its fundamentals. Return on equity is the ratio of current-period net income to average two-period total equity. View historical data on Bio-Gate AG and its competitors. For the Medical Devices & Instruments industry, the median ROE % is 2.43 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Bio-Gate AG's current ROE % is -53.82%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Bio-Gate AG stock overvalued right now?
Bio-Gate AG (STU:BIG) has a current ROE % of -53.82%. The current ROE % is -53.82%. Bio-Gate AG's overall GF Score™ is 30/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is ROE % calculated?
ROE % is calculated from a company's financial statements. For Bio-Gate AG (STU:BIG), the current ROE % is -53.82% as of Dec. 2025. 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.
Bio-Gate AG is a Germany based medical technology company. The company employs silver technology to endow materials and products with antimicrobial properties. It is focused on the medical technology products portfolio. In addition, its technologies are also used to refine cosmetics, consumer goods, and industrial products. The products of the company are plasma-coating, additives, textile solutions, spray, masterbatches, and others. The organization uses two different technologies; first, silver particles are incorporated into cosmetics, paints, veneers or plastics, and second involve coating final products like implants or wound dressings with a silver-containing functional layer.
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