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SUMCOSTU:S3X -9.26%70 EBITDA Margin % is 104.85% as of Dec. 2025, which is 252% above its 10-year median of 29.79. GuruFocus rates STU:S3X with a GF Score™ of 70/100 and a GF Value™ of €9.62 (Significantly Overvalued). The stock has 8 warning signs investors should review. Among 1,023 Semiconductors companies, SUMCO ranks better than 75.95% on this metric.
EBITDA Margin % is calculated as EBITDA divided by its Revenue. SUMCO's EBITDA for the
three
months ended in Dec. 2025 was €604 Mil. SUMCO's Revenue for the
three
months ended in Dec. 2025 was €576 Mil. Therefore, SUMCO's EBITDA margin for the quarter that ended in Dec. 2025 was 104.85%.
SUMCO (STU:S3X) EBITDA Margin % Explanation
EBITDA Margin % is the ratio of EBITDA divided by net sales or Revenue. It is an performance metric measuring company's operating profitability. EBITDA Margin takes depreciation and amortization, interest expense and tax into account, which makes it easy to compare the relative profitability of companies of different sizes in the same industry.
SUMCO EBITDA Margin % Related Terms
SUMCO EBITDA Margin % Historical Data
* Premium members only.
The historical data trend for SUMCO's EBITDA 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:S3X vs AMAT, LRCX, KLAC: EBITDA Margin % Comparison
For the Semiconductor Equipment & Materials subindustry, SUMCO's EBITDA Margin %, along with its competitors' market caps and EBITDA 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.
SUMCO EBITDA Margin % vs Semiconductors Industry
For the Semiconductors industry and Technology sector, SUMCO's EBITDA Margin % distribution charts can be found below:
* The bar in red indicates where SUMCO's EBITDA Margin % falls into.
* 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.
SUMCO (STU:S3X) has a EBITDA Margin % of 104.85% as of Dec. 2025. EBITDA Margin is the ratio of EBITDA divided by net sales or Revenue, usually presented in percent. View historical data on SUMCO and its competitors. This is 252% above median its historical median of 29.79. Over the past decade, SUMCO's EBITDA Margin % has ranged from 17.18 to 39.00. According to the industry distribution chart, SUMCO ranks #246 out of 1023 companies in the Semiconductors industry, placing it in the top 24%.
Is SUMCO's EBITDA Margin % too high?
SUMCO's current EBITDA Margin % of 104.85% is 252% above median its 10-year median of 29.79. Over the past 10 years, this metric has ranged from a low of 17.18 to a high of 39.00. The Semiconductors industry median EBITDA Margin % is 10.71. SUMCO's value of 104.85% is 879% above this industry median. Based on the distribution chart, SUMCO ranks #246 out of 1023 companies in the Semiconductors industry, which is in the top quartile — a strong position relative to peers. Overall, SUMCO has a GF Score™ of 70/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does SUMCO's EBITDA Margin % compare to AMAT and LRCX?
According to the Semiconductors industry distribution chart, SUMCO ranks #246 out of 1023 companies for EBITDA Margin %. This places SUMCO in the top 24% of its industry — outperforming the majority of peers. The industry median EBITDA Margin % is 10.71. SUMCO's value of 104.85% is 879% above this benchmark. Historically, SUMCO's own EBITDA Margin % has ranged from 17.18 to 39.00 over the past decade. While the company's 10-year median is 29.79 vs. the industry median of 10.71, SUMCO 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 EBITDA Margin % for a Semiconductors company?
The median EBITDA Margin % among Semiconductors companies is 10.71, based on 1,023 companies in the industry. Companies in the top quartile (top 25%) have a EBITDA Margin % significantly above this median, while those in the bottom quartile fall well below. However, EBITDA Margin % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. SUMCO's current EBITDA Margin % of 104.85% is 879% 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 EBITDA Margin % mean?
A high EBITDA Margin % can signal that a stock is expensive relative to its fundamentals. EBITDA Margin is the ratio of EBITDA divided by net sales or Revenue, usually presented in percent. View historical data on SUMCO and its competitors. For the Semiconductors industry, the median EBITDA Margin % is 10.71 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. SUMCO's current EBITDA Margin % is 104.85%, which is 252% above median its own 10-year median of 29.79. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is SUMCO stock overvalued right now?
Based on GuruFocus' analysis, SUMCO (STU:S3X) is currently considered Significantly Overvalued. The stock's GF Value™ is €9.62, compared to a current price of €26.95 — trading 180.1% above its estimated fair value. The current EBITDA Margin % is 104.85%, which is 252% above median its 10-year median of 29.79 and 879% above the Semiconductors industry median of 10.71. SUMCO's overall GF Score™ is 70/100 with 8 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is EBITDA Margin % calculated?
EBITDA Margin % is calculated from a company's financial statements. For SUMCO (STU:S3X), the current EBITDA Margin % is 104.85% 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 SUMCO (STU:S3X) Overvalued in 2026?
Based on GuruFocus' analysis, SUMCO stock appears to be overvalued.
The current stock price of €26.95 is trading 180.1% above its estimated GF Value™ of €9.62.
GuruFocus considers SUMCO to be Significantly Overvalued.
Key valuation signals for STU:S3X:
EBITDA Margin %: 104.85% (252% above median its 10-year median of 29.79)
GF Value™: €9.62 vs. price of €26.95 (180.1% above fair value)
Industry Position: 879% above the Semiconductors median (#246 of 1023)
No single metric tells the full story. See the STU:S3X stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Founded in 1999 as a joint venture between Nippon Steel and two Mitsubishi entities, Sumco is the world's second-largest semiconductor-grade silicon wafer manufacturer, with an estimated 21% market share in 2025. Sumco is headquartered in Tokyo and operates seven production sites across Japan. It also maintains sales and support offices in Taiwan, the US, the UK, Indonesia, and Singapore. Sumco sells to most semiconductor manufacturers like TSMC, Intel, Samsung, and Micron. The firm employs over 9,700 people.
70GF Score
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