Tekcore Co (ROCO:3339) Operating Margin %: -14.82% (As of Dec. 2025)


ROCO:3339 Tekcore Co Ltd ROCO:3339
52 GF Score
Price NT$43.15
GF Value NT$39.43
Valuation Modestly Overvalued
! 4 Warning Signs
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What is Tekcore Co Operating Margin %?

Tekcore Co ROCO:3339 -4.17% 52 Operating Margin % is -14.82% as of Dec. 2025. GuruFocus rates ROCO:3339 with a GF Score™ of 52/100 and a GF Value™ of NT$39.43 (Modestly Overvalued). The stock has 4 warning signs investors should review. Among 1,023 Semiconductors companies, Tekcore Co ranks worse than 81.52% on this metric.

Operating Margin % is calculated as Operating Income divided by its Revenue. Tekcore Co's Operating Income for the three months ended in Dec. 2025 was NT$-30.0 Mil. Tekcore Co's Revenue for the three months ended in Dec. 2025 was NT$202.2 Mil. Therefore, Tekcore Co's Operating Margin % for the quarter that ended in Dec. 2025 was -14.82%.

Warning Sign:

Tekcore Co Ltd operating margin has been in a 5-year decline. The average rate of decline per year is -10.4%.

The historical rank and industry rank for Tekcore Co's Operating Margin % or its related term are showing as below:

ROCO:3339' s Operating Margin % Range Over the Past 10 Years
Min: -27.04   Med: -7.88   Max: -1.12
Current: -14.58


ROCO:3339's Operating Margin % is ranked worse than
81.52% of 1023 companies
in the Semiconductors industry
Industry Median: 5.24 vs ROCO:3339: -14.58

Tekcore Co's 5-Year Average Operating Margin % Growth Rate was -10.40% per year.

Tekcore Co's Operating Income for the three months ended in Dec. 2025 was NT$-30.0 Mil. Its Operating Income for the trailing twelve months (TTM) ended in Dec. 2025 was NT$-119.4 Mil.


Tekcore Co  (ROCO:3339) 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 Nokia’s 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.


Tekcore Co Operating Margin % Related Terms


Tekcore Co Operating Margin % Historical Data

* Premium members only.

The historical data trend for Tekcore Co's Operating 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.

Tekcore Co Operating Margin % Chart

Tekcore Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Operating Margin %
Get a 7-Day Free Trial Premium Member Only Premium Member Only -1.12 -12.25 -7.64 -1.57 -14.58

Tekcore Co Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
Operating Margin % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only -10.14 -15.15 -14.80 -13.77 -14.82

ROCO:3339 vs NVDA, AVGO, MU: Operating Margin % Comparison

For the Semiconductors subindustry, Tekcore 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.


Tekcore Co Operating Margin % vs Semiconductors Industry

For the Semiconductors industry and Technology sector, Tekcore Co's Operating Margin % distribution charts can be found below:

* The bar in red indicates where Tekcore Co's Operating Margin % falls into.


ROCO:3339
52GF Score
Tekcore Co Ltd ROCO:3339
Operating Margin % is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Tekcore 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.

Tekcore Co's Operating Margin % for the fiscal year that ended in Dec. 2025 is calculated as

Operating Margin %=Operating Income (A: Dec. 2025 ) / Revenue (A: Dec. 2025 )
=-119.382 / 818.791
=-14.58 %

Tekcore Co's Operating Margin % for the quarter that ended in Dec. 2025 is calculated as

Operating Margin %=Operating Income (Q: Dec. 2025 ) / Revenue (Q: Dec. 2025 )
=-29.965 / 202.193
=-14.82 %

* 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.

Frequently Asked Questions Learn more about Operating Margin % →
What does a Operating Margin % of -14.82% mean?
Tekcore Co (ROCO:3339) has a Operating Margin % of -14.82% as of Dec. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on Tekcore Co and its competitors. According to the industry distribution chart, Tekcore Co ranks #834 out of 1023 companies in the Semiconductors industry, placing it in the top 81.5%.
Is Tekcore Co's Operating Margin % too high?
Tekcore Co's current Operating Margin % is -14.82%. Based on the distribution chart, Tekcore Co ranks #834 out of 1023 companies in the Semiconductors industry, which is in the bottom quartile relative to peers. Overall, Tekcore Co has a GF Score™ of 52/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Tekcore Co's Operating Margin % compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, Tekcore Co ranks #834 out of 1023 companies for Operating Margin %. This places Tekcore Co in the lower half of its industry. The industry median Operating Margin % is 5.24. 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 5.24, based on 1,023 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. 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 Tekcore Co and its competitors. For the Semiconductors industry, the median Operating Margin % is 5.24 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Tekcore Co's current Operating Margin % is -14.82%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Tekcore Co stock overvalued right now?
Based on GuruFocus' analysis, Tekcore Co (ROCO:3339) is currently considered Modestly Overvalued. The stock's GF Value™ is NT$39.43, compared to a current price of NT$43.15 — trading 9.4% above its estimated fair value. The current Operating Margin % is -14.82%. Tekcore Co's overall GF Score™ is 52/100 with 4 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 Tekcore Co (ROCO:3339), the current Operating Margin % is -14.82% 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 Tekcore Co (ROCO:3339) Overvalued in 2026?

Based on GuruFocus' analysis, Tekcore Co stock appears to be overvalued. The current stock price of NT$43.15 is trading 9.4% above its estimated GF Value™ of NT$39.43. GuruFocus considers Tekcore Co to be Modestly Overvalued.

Key valuation signals for ROCO:3339:

  • Operating Margin %: -14.82%
  • GF Value™: NT$39.43 vs. price of NT$43.15 (9.4% above fair value)
  • GF Score™: 52/100 with 4 warning signs

No single metric tells the full story. See the ROCO:3339 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Tekcore Co Business Description

Address No. 18, Ziqiang 3rd Road, Nan-Kung Industrial Zone, Nantou County, Nantou, TWN
Tekcore Co Ltd engages in the manufacturing and sales of epitaxial wafers and chips for light-emitting diodes. The company specializes in high-brightness chips in green, blue, and ultraviolet wavelengths, as well as red, yellow, and orange chips to cover the various spectra of visible light. Its products are used in various applications, including large-scale displays and billboards; optical fiber cables; indicator lights; LCD and projection backlighting; low-light environments; miniaturized light sources; cell phones, cameras, and other small electronic displays.
52GF Score

Get the complete analysis for ROCO:3339

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

NT$43.15
Price
NT$39.43
GF Value