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Sunmax Biotechnology CoROCO:4728 +1.06%91 Operating Margin % is 41.97% as of Dec. 2025, which is 13% above its 10-year median of 37.03. GuruFocus rates ROCO:4728 with a GF Score™ of 91/100 and a GF Value™ of NT$441.22 (Modestly Undervalued). The stock has 3 warning signs investors should review. Among 939 Biotechnology companies, Sunmax Biotechnology Co ranks better than 97.98% on this metric.
Sunmax Biotechnology Co (ROCO:4728) 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.
Sunmax Biotechnology Co Operating Margin % Related Terms
Sunmax Biotechnology Co Operating Margin % Historical Data
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The historical data trend for Sunmax Biotechnology Co'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.
ROCO:4728 vs VRTX, REGN, ALNY: Operating Margin % Comparison
For the Biotechnology subindustry, Sunmax Biotechnology 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.
Sunmax Biotechnology Co Operating Margin % vs Biotechnology Industry
For the Biotechnology industry and Healthcare sector, Sunmax Biotechnology Co's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Sunmax Biotechnology Co's Operating Margin % falls into.
Sunmax Biotechnology 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.
Sunmax Biotechnology 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.
Sunmax Biotechnology Co (ROCO:4728) has a Operating Margin % of 41.97% as of Dec. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on Sunmax Biotechnology Co and its competitors. This is 13% above median its historical median of 37.03. Over the past decade, Sunmax Biotechnology Co's Operating Margin % has ranged from 1.99 to 55.43. According to the industry distribution chart, Sunmax Biotechnology Co ranks #19 out of 939 companies in the Biotechnology industry, placing it in the top 2%.
Is Sunmax Biotechnology Co's Operating Margin % too high?
Sunmax Biotechnology Co's current Operating Margin % of 41.97% is 13% above median its 10-year median of 37.03. Over the past 10 years, this metric has ranged from a low of 1.99 to a high of 55.43. Based on the distribution chart, Sunmax Biotechnology Co ranks #19 out of 939 companies in the Biotechnology industry, which is in the top quartile — a strong position relative to peers. Overall, Sunmax Biotechnology Co has a GF Score™ of 91/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Sunmax Biotechnology Co's Operating Margin % compare to VRTX and REGN?
According to the Biotechnology industry distribution chart, Sunmax Biotechnology Co ranks #19 out of 939 companies for Operating Margin %. This places Sunmax Biotechnology Co in the top 2% of its industry — outperforming the majority of peers. Historically, Sunmax Biotechnology Co's own Operating Margin % has ranged from 1.99 to 55.43 over the past decade. 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 Biotechnology company?
A good Operating Margin % depends on the Biotechnology industry context. 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 Sunmax Biotechnology Co and its competitors. Sunmax Biotechnology Co's current Operating Margin % is 41.97%, which is 13% above median its own 10-year median of 37.03. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Sunmax Biotechnology Co stock overvalued right now?
Based on GuruFocus' analysis, Sunmax Biotechnology Co (ROCO:4728) is currently considered Modestly Undervalued. The stock's GF Value™ is NT$441.22, compared to a current price of NT$381.00 — trading 13.6% below its estimated fair value. The current Operating Margin % is 41.97%, which is 13% above median its 10-year median of 37.03. Sunmax Biotechnology Co's overall GF Score™ is 91/100 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 Sunmax Biotechnology Co (ROCO:4728), the current Operating Margin % is 41.97% 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 Sunmax Biotechnology Co (ROCO:4728) Overvalued in 2026?
Based on GuruFocus' analysis, Sunmax Biotechnology Co stock appears to be undervalued.
The current stock price of NT$381.00 is trading 13.6% below its estimated GF Value™ of NT$441.22.
GuruFocus considers Sunmax Biotechnology Co to be Modestly Undervalued.
Key valuation signals for ROCO:4728:
Operating Margin %: 41.97% (13% above median its 10-year median of 37.03)
GF Value™: NT$441.22 vs. price of NT$381.00 (13.6% below fair value)
No single metric tells the full story. See the ROCO:4728 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Sunmax Biotechnology Co Ltd is a biomedical company in Taiwan. It is engaged in the development, manufacturing, and commercialization of Sunmax medical devices and bio-surgical products. Additionally, it also researches, develops, manufactures and sales biomedical material grade collagen and related products. The company's products include medical products, biomedical materials, and porcine collagen skin care products.
91GF Score
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