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BrainCool ABSTU:5YL 69 Operating Margin % is -85.97% as of Mar. 2026. GuruFocus rates STU:5YL with a GF Score™ of 69/100 and a GF Value™ of €0.09 (Possible Value Trap). The stock has 4 warning signs investors should review. Among 815 Medical Devices & Instruments companies, BrainCool AB ranks worse than 81.35% on this metric.
Operating Margin % is calculated as Operating Income divided by its Revenue. BrainCool AB's Operating Income for the
three
months ended in Mar. 2026 was €-0.83 Mil. BrainCool AB's Revenue for the
three
months ended in Mar. 2026 was €0.96 Mil. Therefore, BrainCool AB's Operating Margin % for the quarter that ended in Mar. 2026 was -85.97%.
Good Sign:
BrainCool AB operating margin is expanding. Margin expansion is usually a good sign.
The historical rank and industry rank for BrainCool AB's Operating Margin % or its related term are showing as below:
STU:5YL'
s Operating Margin % Range Over the Past 10 Years
Min: -2995.34 Med: -438.71 Max: -83.97
Current: -83.97
STU:5YL's Operating Margin % is ranked worse than 81.35% of 815
companies
in the Medical Devices & Instruments industry
Industry Median: 3.17
vs STU:5YL: -83.97
BrainCool AB's 5-Year Average Operating Margin % Growth Rate was 29.00% per year.
BrainCool AB's Operating Income for the
three
months ended in Mar. 2026 was €-0.83 Mil.
Its Operating Income for the trailing twelve months (TTM) ended in Mar. 2026 was €-3.24 Mil.
BrainCool AB (STU:5YL) 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.
BrainCool AB Operating Margin % Related Terms
BrainCool AB Operating Margin % Historical Data
* Premium members only.
The historical data trend for BrainCool AB'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.
STU:5YL vs ABT, SYK, MDT: Operating Margin % Comparison
For the Medical Devices subindustry, BrainCool AB'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.
BrainCool AB Operating Margin % vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, BrainCool AB's Operating Margin % distribution charts can be found below:
* The bar in red indicates where BrainCool AB'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.
BrainCool AB'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.
BrainCool AB (STU:5YL) has a Operating Margin % of -85.97% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on BrainCool AB and its competitors. According to the industry distribution chart, BrainCool AB ranks #663 out of 815 companies in the Medical Devices & Instruments industry, placing it in the top 81.3%.
Is BrainCool AB's Operating Margin % too high?
BrainCool AB's current Operating Margin % is -85.97%. Based on the distribution chart, BrainCool AB ranks #663 out of 815 companies in the Medical Devices & Instruments industry, which is in the bottom quartile relative to peers. Overall, BrainCool AB has a GF Score™ of 69/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does BrainCool AB's Operating Margin % compare to ABT and SYK?
According to the Medical Devices & Instruments industry distribution chart, BrainCool AB ranks #663 out of 815 companies for Operating Margin %. This places BrainCool AB in the lower half of its industry. The industry median Operating Margin % is 3.17. 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 Medical Devices & Instruments company?
The median Operating Margin % among Medical Devices & Instruments companies is 3.17, based on 815 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. 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 BrainCool AB and its competitors. For the Medical Devices & Instruments industry, the median Operating Margin % is 3.17 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. BrainCool AB's current Operating Margin % is -85.97%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is BrainCool AB stock overvalued right now?
Based on GuruFocus' analysis, BrainCool AB (STU:5YL) is currently considered Possible Value Trap. The stock's GF Value™ is €0.09, compared to a current price of €0.06 — trading 32.2% below its estimated fair value. The current Operating Margin % is -85.97%. BrainCool AB's overall GF Score™ is 69/100 with 4 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 BrainCool AB (STU:5YL), the current Operating Margin % is -85.97% 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 BrainCool AB (STU:5YL) Overvalued in 2026?
Based on GuruFocus' analysis, BrainCool AB stock appears to be undervalued.
The current stock price of €0.06 is trading 32.2% below its estimated GF Value™ of €0.09.
GuruFocus considers BrainCool AB to be Possible Value Trap.
Key valuation signals for STU:5YL:
Operating Margin %: -85.97%
GF Value™: €0.09 vs. price of €0.06 (32.2% below fair value)
No single metric tells the full story. See the STU:5YL stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
BrainCool AB is a medical device company engaged in developing, marketing, and selling medical cooling systems for diseases like stroke, oral mucositis, migraine, and sudden cardiac arrest.
69GF Score
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