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Zen VoceROCO:3581 -6.48%56 Operating Margin % is 9.40% as of Dec. 2025, which is 17% above its 10-year median of 8.05. GuruFocus rates ROCO:3581 with a GF Score™ of 56/100 and a GF Value™ of NT$38.01 (Significantly Overvalued). The stock has 2 warning signs investors should review. Among 1,023 Semiconductors companies, Zen Voce ranks better than 57.67% on this metric.
Operating Margin % is calculated as Operating Income divided by its Revenue. Zen Voce's Operating Income for the
three
months ended in Dec. 2025 was NT$47 Mil. Zen Voce's Revenue for the
three
months ended in Dec. 2025 was NT$500 Mil. Therefore, Zen Voce's Operating Margin % for the quarter that ended in Dec. 2025 was 9.40%.
Warning Sign:
Zen Voce Corp operating margin has been in a 5-year decline. The average rate of decline per year is -13.6%.
The historical rank and industry rank for Zen Voce's Operating Margin % or its related term are showing as below:
ROCO:3581'
s Operating Margin % Range Over the Past 10 Years
Min: 4.3 Med: 8.05 Max: 11.18
Current: 7.97
ROCO:3581's Operating Margin % is ranked better than 57.67% of 1023
companies
in the Semiconductors industry
Industry Median: 5.33
vs ROCO:3581: 7.97
Zen Voce's 5-Year Average Operating Margin % Growth Rate was -13.60% per year.
Zen Voce's Operating Income for the
three
months ended in Dec. 2025 was NT$47 Mil.
Its Operating Income for the trailing twelve months (TTM) ended in Dec. 2025 was NT$125 Mil.
Zen Voce (ROCO:3581) 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.
Zen Voce Operating Margin % Related Terms
Zen Voce Operating Margin % Historical Data
* Premium members only.
The historical data trend for Zen Voce'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:3581 vs NVDA, AVGO, MU: Operating Margin % Comparison
For the Semiconductors subindustry, Zen Voce'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.
Zen Voce Operating Margin % vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Zen Voce's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Zen Voce'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.
Zen Voce'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.
Zen Voce (ROCO:3581) has a Operating Margin % of 9.40% as of Dec. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on Zen Voce and its competitors. This is 17% above median its historical median of 8.05. Over the past decade, Zen Voce's Operating Margin % has ranged from 4.30 to 11.18. According to the industry distribution chart, Zen Voce ranks #433 out of 1023 companies in the Semiconductors industry, placing it in the top 42.3%.
Is Zen Voce's Operating Margin % too high?
Zen Voce's current Operating Margin % of 9.40% is 17% above median its 10-year median of 8.05. Over the past 10 years, this metric has ranged from a low of 4.30 to a high of 11.18. The Semiconductors industry median Operating Margin % is 5.33. Zen Voce's value of 9.40% is 76.4% above this industry median. Based on the distribution chart, Zen Voce ranks #433 out of 1023 companies in the Semiconductors industry, which is above the industry midpoint. Overall, Zen Voce has a GF Score™ of 56/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Zen Voce's Operating Margin % compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, Zen Voce ranks #433 out of 1023 companies for Operating Margin %. This puts Zen Voce in the upper half of its industry. The industry median Operating Margin % is 5.33. Zen Voce's value of 9.40% is 76.4% above this benchmark. Historically, Zen Voce's own Operating Margin % has ranged from 4.30 to 11.18 over the past decade. While the company's 10-year median is 8.05 vs. the industry median of 5.33, Zen Voce 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 Semiconductors company?
The median Operating Margin % among Semiconductors companies is 5.33, based on 1,023 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. Zen Voce's current Operating Margin % of 9.40% is 76.4% 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 Zen Voce and its competitors. For the Semiconductors industry, the median Operating Margin % is 5.33 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Zen Voce's current Operating Margin % is 9.40%, which is 17% above median its own 10-year median of 8.05. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Zen Voce stock overvalued right now?
Based on GuruFocus' analysis, Zen Voce (ROCO:3581) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$38.01, compared to a current price of NT$115.50 — trading 203.9% above its estimated fair value. The current Operating Margin % is 9.40%, which is 17% above median its 10-year median of 8.05 and 76.4% above the Semiconductors industry median of 5.33. Zen Voce's overall GF Score™ is 56/100 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 Zen Voce (ROCO:3581), the current Operating Margin % is 9.40% 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 Zen Voce (ROCO:3581) Overvalued in 2026?
Based on GuruFocus' analysis, Zen Voce stock appears to be overvalued.
The current stock price of NT$115.50 is trading 203.9% above its estimated GF Value™ of NT$38.01.
GuruFocus considers Zen Voce to be Significantly Overvalued.
Key valuation signals for ROCO:3581:
Operating Margin %: 9.40% (17% above median its 10-year median of 8.05)
GF Value™: NT$38.01 vs. price of NT$115.50 (203.9% above fair value)
Industry Position: 76.4% above the Semiconductors median (#433 of 1023)
No single metric tells the full story. See the ROCO:3581 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Zen Voce Corp is a Taiwan based company engaged in the business of providing semiconductor, optoelectronics and MEMS and LCD's equipment. It offers equipment products which include IC packaging machine design and manufacture of bumping, wafer cutting machine and cleaning machine design and manufacturing, and board cutting machine and cleaning machine design and manufacturing. The test products provided by the company includes Wafer test probe card PCB design and manufacturing, IC test HIFIX and CHANG KIT design and manufacturing, SOCKET IC design and manufacturing test, Acting IC HANDLER, and Acting SOCKET IC burn-in test.
56GF Score
Get the complete analysis for ROCO:3581
Operating Margin % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
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