SUMCO (STU:S3X) Short Interest

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 Short Interest?

Short Interest can be expressed as a percentage by dividing the number of shares sold short by the total number of outstanding shares.

Due to the license agreement change with our data vendor, Short Interest related data on GuruFocus will no longer be updated. Existing data will remain as-is, while new data will not be available, except for certain Australian and Canadian stocks.

STU:S3X vs AMAT, LRCX, KLAC: Short Interest Comparison

For the Semiconductor Equipment & Materials subindustry, SUMCO's Short Interest, along with its competitors' market caps and Short Interest 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 Short Interest vs Semiconductors Industry

For the Semiconductors industry and Technology sector, SUMCO's Short Interest distribution charts can be found below:

* The bar in red indicates where SUMCO's Short Interest falls into.


STU:S3X
66GF Score
SUMCO Corp STU:S3X
Short Interest is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

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:

  • Short Interest:
  • 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

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

€26.95
Price
€9.62
GF Value