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ASE Technology Holding CoSTU:2DQ -1.06%69 Operating Margin % is 10.10% as of Mar. 2026, which is 29% above its 10-year median of 7.83. GuruFocus rates STU:2DQ with a GF Score™ of 69/100 and a GF Value™ of €10.29 (Significantly Overvalued). The stock has 9 warning signs investors should review. Among 1,022 Semiconductors companies, ASE Technology Holding Co ranks better than 59.59% on this metric.
ASE Technology Holding Co (STU:2DQ) 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.
ASE Technology Holding Co Operating Margin % Related Terms
ASE Technology Holding 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.
ASE Technology Holding Co Operating Margin % Chart
STU:2DQ vs NVDA, AVGO, MU: Operating Margin % Comparison
For the Semiconductors subindustry, ASE Technology Holding 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.
ASE Technology Holding Co Operating Margin % vs Semiconductors Industry
For the Semiconductors industry and Technology sector, ASE Technology Holding Co's Operating Margin % distribution charts can be found below:
* The bar in red indicates where ASE Technology Holding Co's Operating Margin % falls into.
ASE Technology Holding 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.
ASE Technology Holding 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.
ASE Technology Holding Co (STU:2DQ) has a Operating Margin % of 10.10% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on ASE Technology Holding Co and its competitors. This is 29% above median its historical median of 7.83. Over the past decade, ASE Technology Holding Co's Operating Margin % has ranged from 5.84 to 12.16. According to the industry distribution chart, ASE Technology Holding Co ranks #413 out of 1022 companies in the Semiconductors industry, placing it in the top 40.4%.
Is ASE Technology Holding Co's Operating Margin % too high?
ASE Technology Holding Co's current Operating Margin % of 10.10% is 29% above median its 10-year median of 7.83. Over the past 10 years, this metric has ranged from a low of 5.84 to a high of 12.16. The Semiconductors industry median Operating Margin % is 5.34. ASE Technology Holding Co's value of 10.10% is 89.1% above this industry median. Based on the distribution chart, ASE Technology Holding Co ranks #413 out of 1022 companies in the Semiconductors industry, which is above the industry midpoint. Overall, ASE Technology Holding Co has a GF Score™ of 69/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does ASE Technology Holding Co's Operating Margin % compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, ASE Technology Holding Co ranks #413 out of 1022 companies for Operating Margin %. This puts ASE Technology Holding Co in the upper half of its industry. The industry median Operating Margin % is 5.34. ASE Technology Holding Co's value of 10.10% is 89.1% above this benchmark. Historically, ASE Technology Holding Co's own Operating Margin % has ranged from 5.84 to 12.16 over the past decade. While the company's 10-year median is 7.83 vs. the industry median of 5.34, ASE Technology Holding 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 Semiconductors company?
The median Operating Margin % among Semiconductors companies is 5.34, based on 1,022 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. ASE Technology Holding Co's current Operating Margin % of 10.10% is 89.1% 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 ASE Technology Holding Co and its competitors. For the Semiconductors industry, the median Operating Margin % is 5.34 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. ASE Technology Holding Co's current Operating Margin % is 10.10%, which is 29% above median its own 10-year median of 7.83. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is ASE Technology Holding Co stock overvalued right now?
Based on GuruFocus' analysis, ASE Technology Holding Co (STU:2DQ) is currently considered Significantly Overvalued. The stock's GF Value™ is €10.29, compared to a current price of €37.40 — trading 263.5% above its estimated fair value. The current Operating Margin % is 10.10%, which is 29% above median its 10-year median of 7.83 and 89.1% above the Semiconductors industry median of 5.34. ASE Technology Holding Co's overall GF Score™ is 69/100 with 9 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 ASE Technology Holding Co (STU:2DQ), the current Operating Margin % is 10.10% 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 ASE Technology Holding Co (STU:2DQ) Overvalued in 2026?
Based on GuruFocus' analysis, ASE Technology Holding Co stock appears to be overvalued.
The current stock price of €37.40 is trading 263.5% above its estimated GF Value™ of €10.29.
GuruFocus considers ASE Technology Holding Co to be Significantly Overvalued.
Key valuation signals for STU:2DQ:
Operating Margin %: 10.10% (29% above median its 10-year median of 7.83)
GF Value™: €10.29 vs. price of €37.40 (263.5% above fair value)
Industry Position: 89.1% above the Semiconductors median (#413 of 1022)
No single metric tells the full story. See the STU:2DQ stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
ASE Technology Holding Co Ltd is a semiconductor assembly and testing firm. The company operates in segments: Packaging, Testing, Electronic Manufacturing Services and others. Of these, Packaging segment contribute the maximum revenue. The packaging segment involves packaging bare semiconductors into completed semiconductors with improved electrical and thermal characteristics. The Testing Segment includes front-end engineering testing, wafer probing, and final testing services. In the EMS segment, the company designs manufactures, and sells electronic components and telecommunication equipment motherboards. The company is based in Taiwan but generates over half its sales from firms in the United States.
69GF Score
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