Winston Medical Supply CoROCO:6817 -0.17%85 Operating Margin % is 17.70% as of Dec. 2025, which is 13% below its 10-year median of 20.26. GuruFocus rates ROCO:6817 with a GF Score™ of 85/100 and a GF Value™ of NT$102.51 (Significantly Undervalued). The stock has 2 warning signs investors should review. Among 955 Drug Manufacturers companies, Winston Medical Supply Co ranks better than 82.41% on this metric.
Winston Medical Supply Co Ltd operating margin is expanding. Margin expansion is usually a good sign.
The historical rank and industry rank for Winston Medical Supply Co's Operating Margin % or its related term are showing as below:
ROCO:6817'
s Operating Margin % Range Over the Past 10 Years
Min: -8.27 Med: 20.26 Max: 27.65
Current: 20.26
ROCO:6817's Operating Margin % is ranked better than 82.41% of 955
companies
in the Drug Manufacturers industry
Industry Median: 7.45
vs ROCO:6817: 20.26
Winston Medical Supply Co (ROCO:6817) 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.
Winston Medical Supply Co Operating Margin % Related Terms
Winston Medical Supply Co Operating Margin % Historical Data
* 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.
Winston Medical Supply Co Operating Margin % Chart
For the Drug Manufacturers - Specialty & Generic subindustry, Winston Medical Supply Co'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.
Winston Medical Supply Co Operating Margin % vs Drug Manufacturers Industry
For the Drug Manufacturers industry and Healthcare sector, Winston Medical Supply Co's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Winston Medical Supply Co's Operating Margin % falls into.
Winston Medical Supply Co Operating Margin % Calculation
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.
Winston Medical Supply Co'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.
Winston Medical Supply Co (ROCO:6817) has a Operating Margin % of 17.70% as of Dec. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on Winston Medical Supply Co and its competitors. This is 13% below median its historical median of 20.26. According to the industry distribution chart, Winston Medical Supply Co ranks #168 out of 955 companies in the Drug Manufacturers industry, placing it in the top 17.6%.
Is Winston Medical Supply Co's Operating Margin % too high?
Winston Medical Supply Co's current Operating Margin % of 17.70% is 13% below median its 10-year median of 20.26. The Drug Manufacturers industry median Operating Margin % is 7.45. Winston Medical Supply Co's value of 17.70% is 137.6% above this industry median. Based on the distribution chart, Winston Medical Supply Co ranks #168 out of 955 companies in the Drug Manufacturers industry, which is in the top quartile — a strong position relative to peers. Overall, Winston Medical Supply Co has a GF Score™ of 85/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Winston Medical Supply Co's Operating Margin % compare to ZTS?
According to the Drug Manufacturers industry distribution chart, Winston Medical Supply Co ranks #168 out of 955 companies for Operating Margin %. This places Winston Medical Supply Co in the top 18% of its industry — outperforming the majority of peers. The industry median Operating Margin % is 7.45. Winston Medical Supply Co's value of 17.70% is 137.6% above this benchmark. While the company's 10-year median is 20.26 vs. the industry median of 7.45, Winston Medical Supply Co 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 Drug Manufacturers company?
The median Operating Margin % among Drug Manufacturers companies is 7.45, based on 955 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. Winston Medical Supply Co's current Operating Margin % of 17.70% is 137.6% 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 Winston Medical Supply Co and its competitors. For the Drug Manufacturers industry, the median Operating Margin % is 7.45 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Winston Medical Supply Co's current Operating Margin % is 17.70%, which is 13% below median its own 10-year median of 20.26. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Winston Medical Supply Co stock overvalued right now?
Based on GuruFocus' analysis, Winston Medical Supply Co (ROCO:6817) is currently considered Significantly Undervalued. The stock's GF Value™ is NT$102.51, compared to a current price of NT$59.90 — trading 41.6% below its estimated fair value. The current Operating Margin % is 17.70%, which is 13% below median its 10-year median of 20.26 and 137.6% above the Drug Manufacturers industry median of 7.45. Winston Medical Supply Co's overall GF Score™ is 85/100 with 2 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 Winston Medical Supply Co (ROCO:6817), the current Operating Margin % is 17.70% 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.
Is Winston Medical Supply Co (ROCO:6817) Overvalued in 2026?
Based on GuruFocus' analysis, Winston Medical Supply Co stock appears to be undervalued.
The current stock price of NT$59.90 is trading 41.6% below its estimated GF Value™ of NT$102.51.
GuruFocus considers Winston Medical Supply Co to be Significantly Undervalued.
Key valuation signals for ROCO:6817:
Operating Margin %: 17.70% (13% below median its 10-year median of 20.26)
GF Value™: NT$102.51 vs. price of NT$59.90 (41.6% below fair value)
Industry Position: 137.6% above the Drug Manufacturers median (#168 of 955)
No single metric tells the full story. See the ROCO:6817 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Winston Medical Supply Co Ltd is a manufacturer of medical products. It produces sterile ophthalmic preparations, hormone preparations and healthy products.
85GF Score
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Operating Margin % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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