SUMCO (STU:S3X) Valuation Rank

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

STU:S3X SUMCO Corp STU:S3X
66 GF Score
Price €26.95
GF Value €9.62
Valuation Significantly Overvalued
! 8 Warning Signs
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What is SUMCO Valuation Rank?

The Valuation Rank measures the current valuation of a business relative to other companies in the same industry and its own historical valuation. The companies are split in equal numbers and then ranked from 1 to 10, with 10 as the most undervalued and 1 as the most overvalued.

  1. Three factors:
    • Absolute valuation (medpsvalue) relative to current stock price, rank among all companies
    • Historical valuation over the past 10 years. Rank pe, ps, pocf, ev2ebit over their own historical values
    • Industry relative valuation
  2. Companies without enough data is not ranked
  3. Companies with negative earnings are ranked lower

These three factors are used to calculate the value score for every eligible company, with values from 1 to 10. The final ranked companies are split in equal numbers and ranked from 1 to 10, with 10 as the most undervalued, and 1 as the most overvalued. The numbers of companies in each rank are the same.

SUMCO Valuation Rank Related Terms

STU:S3X
66GF Score
SUMCO Corp STU:S3X
Valuation Rank is just one metric. See GF Score™, valuation, warning signs, and more.
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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:

  • Valuation Rank:
  • GF Value™: €9.62 vs. price of €26.95 (180.1% above fair value)
  • GF Score™: 66/100 with 8 warning signs

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.

SUMCO Business Description

Address 1-2-1 Shibaura, Minato-ku, Tokyo, JPN, 105-8634
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.
66GF Score

Get the complete analysis for STU:S3X

Valuation Rank is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€26.95
Price
€9.62
GF Value