SUMCO (SUMCF) Institutional Ownership: 56.38% (As of Jul. 19, 2026)

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Director of Data and Quant Analytics at GuruFocus
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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.

SUMCF SUMCO Corp SUMCF
69 GF Score
Price $24.99
GF Value $11.71
Valuation Significantly Overvalued
! 5 Warning Signs
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What is SUMCO Institutional Ownership?

SUMCO SUMCF -13.35% 69 Institutional Ownership is 56.38% as of Jul. 19, 2026. GuruFocus rates SUMCF with a GF Score™ of 69/100 and a GF Value™ of $11.71 (Significantly Overvalued). The stock has 5 warning signs investors should review.

Institutional ownership is the percentage of shares that are owned by institutions out of the total shares outstanding. As of today, SUMCO's institutional ownership is 56.38%.

Insider Ownership is the percentage of shares that are owned by company insiders relative to the total shares outstanding. As of today, SUMCO's Insider Ownership is 0.00%.

Float Percentage Of Total Shares Outstanding is the percentage of float shares relative to the total shares outstanding. As of today, SUMCO's Float Percentage Of Total Shares Outstanding is 0.00%.

SUMCO Institutional Ownership Historical Data

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The historical data trend for SUMCO's Institutional Ownership 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.

SUMCO Institutional Ownership Chart

SUMCO Historical Data

The historical data trend for SUMCO can be seen below:

2025-09-30 2025-10-31 2025-11-30 2025-12-31 2026-01-31 2026-02-28 2026-03-31 2026-04-30 2026-05-31 2026-06-30
Institutional Ownership 52.39 51.14 52.65 51.52 52.27 51.93 52.64 49.13 48.49 46.58
SUMCF
69GF Score
SUMCO Corp SUMCF
Institutional Ownership is just one metric. See GF Score™, valuation, warning signs, and more.
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SUMCO Institutional Ownership Calculation

The percentage of shares that are owned by institutions out of the total shares outstanding.

What does a Institutional Ownership of 56.38% mean?
SUMCO (SUMCF) has a Institutional Ownership of 56.38% as of Jul. 19, 2026. Institutional ownership equals the percent of shares owned by financial institutions relative to total shares. View historical data on SUMCO and its competitors.
Is SUMCO's Institutional Ownership too high?
SUMCO's current Institutional Ownership is 56.38%. Overall, SUMCO has a GF Score™ of 69/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does SUMCO's Institutional Ownership compare to AMAT and LRCX?
SUMCO's Institutional Ownership of 56.38% can be compared against companies in the Semiconductors industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Institutional Ownership for a Semiconductors company?
A good Institutional Ownership depends on the Semiconductors industry context. However, Institutional Ownership should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Institutional Ownership mean?
A high Institutional Ownership can signal that a stock is expensive relative to its fundamentals. Institutional ownership equals the percent of shares owned by financial institutions relative to total shares. View historical data on SUMCO and its competitors. SUMCO's current Institutional Ownership is 56.38%. 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 (SUMCF) is currently considered Significantly Overvalued. The stock's GF Value™ is $11.71, compared to a current price of $24.99 — trading 113.4% above its estimated fair value. The current Institutional Ownership is 56.38%. SUMCO's overall GF Score™ is 69/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Institutional Ownership calculated?
Institutional Ownership is calculated from a company's financial statements. For SUMCO (SUMCF), the current Institutional Ownership is 56.38% as of Jul. 19, 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 SUMCO (SUMCF) Overvalued in 2026?

Based on GuruFocus' analysis, SUMCO stock appears to be overvalued. The current stock price of $24.99 is trading 113.4% above its estimated GF Value™ of $11.71. GuruFocus considers SUMCO to be Significantly Overvalued.

Key valuation signals for SUMCF:

  • Institutional Ownership: 56.38%
  • GF Value™: $11.71 vs. price of $24.99 (113.4% above fair value)
  • GF Score™: 69/100 with 5 warning signs

No single metric tells the full story. See the SUMCF 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.
69GF Score

Get the complete analysis for SUMCF

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

$24.99
Price
$11.71
GF Value