G-Tech Optoelectronics (TPE:3149) Pretax Margin %: -28.97% (As of Dec. 2025)

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.

TPE:3149 G-Tech Optoelectronics Corp TPE:3149
51 GF Score
Price NT$87.30
GF Value NT$21.98
Valuation Significantly Overvalued
! 6 Warning Signs
View Full Analysis

What is G-Tech Optoelectronics Pretax Margin %?

G-Tech Optoelectronics TPE:3149 -5.42% 51 Pretax Margin % is -28.97% as of Dec. 2025. GuruFocus rates TPE:3149 with a GF Score™ of 51/100 and a GF Value™ of NT$21.98 (Significantly Overvalued). The stock has 6 warning signs investors should review. Among 2,477 Hardware companies, G-Tech Optoelectronics ranks worse than 88.66% on this metric.

Pre-Tax margin is calculated as Pre-Tax Income divided by its Revenue. G-Tech Optoelectronics's Pre-Tax Income for the three months ended in Dec. 2025 was NT$-189 Mil. G-Tech Optoelectronics's Revenue for the three months ended in Dec. 2025 was NT$654 Mil. Therefore, G-Tech Optoelectronics's pretax margin for the quarter that ended in Dec. 2025 was -28.97%.

The historical rank and industry rank for G-Tech Optoelectronics's Pretax Margin % or its related term are showing as below:

TPE:3149' s Pretax Margin % Range Over the Past 10 Years
Min: -28.61   Med: -8.69   Max: 0.45
Current: -28.61


TPE:3149's Pretax Margin % is ranked worse than
88.66% of 2477 companies
in the Hardware industry
Industry Median: 3.58 vs TPE:3149: -28.61

G-Tech Optoelectronics  (TPE:3149) Pretax Margin % Explanation

The pretax margin, as know as pretax profit margin, is widely used to measure the operating efficiency of a company before deducting taxes.

The pretax margin is sometimes preferred over the net margin as tax expenditures can make profitability comparisons between companies misleading.

It is a useful tool to compare companies operating in the same sector and less effective when comparing companies from other sectors as each industry generally has different operating expenses and sales patterns.

The long term trend of the pretax margin is a good indicator of the competitiveness and health of the business.


G-Tech Optoelectronics Pretax Margin % Related Terms


G-Tech Optoelectronics Pretax Margin % Historical Data

* Premium members only.

The historical data trend for G-Tech Optoelectronics's Pretax 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.

G-Tech Optoelectronics Pretax Margin % Chart

G-Tech Optoelectronics Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Pretax Margin %
Get a 7-Day Free Trial Premium Member Only Premium Member Only -4.62 -12.99 -6.34 -11.03 -28.61

G-Tech Optoelectronics Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
Pretax 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 -25.08 -31.02 -29.12 -25.80 -28.97

TPE:3149 vs APH, GLW: Pretax Margin % Comparison

For the Electronic Components subindustry, G-Tech Optoelectronics's Pretax Margin %, along with its competitors' market caps and Pretax 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.


G-Tech Optoelectronics Pretax Margin % vs Hardware Industry

For the Hardware industry and Technology sector, G-Tech Optoelectronics's Pretax Margin % distribution charts can be found below:

* The bar in red indicates where G-Tech Optoelectronics's Pretax Margin % falls into.


TPE:3149
51GF Score
G-Tech Optoelectronics Corp TPE:3149
Pretax Margin % is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

G-Tech Optoelectronics Pretax Margin % Calculation

Pretax margin - also known as pretax profit margin is the ratio of Pretax Income divided by net sales or Revenue, usually presented in percent.

G-Tech Optoelectronics's Pretax Margin for the fiscal year that ended in Dec. 2025 is calculated as

Pretax Margin=Pre-Tax Income (A: Dec. 2025 )/Revenue (A: Dec. 2025 )
=-653.014/2282.748
=-28.61 %

G-Tech Optoelectronics's Pretax Margin for the quarter that ended in Dec. 2025 is calculated as

Pretax Margin=Pre-Tax Income (Q: Dec. 2025 )/Revenue (Q: Dec. 2025 )
=-189.476/654.146
=-28.97 %

* 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 Pretax Margin % →
What does a Pretax Margin % of -28.97% mean?
G-Tech Optoelectronics (TPE:3149) has a Pretax Margin % of -28.97% as of Dec. 2025. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on G-Tech Optoelectronics and its competitors. According to the industry distribution chart, G-Tech Optoelectronics ranks #2196 out of 2477 companies in the Hardware industry, placing it in the top 88.7%.
Is G-Tech Optoelectronics' Pretax Margin % too high?
G-Tech Optoelectronics' current Pretax Margin % is -28.97%. Based on the distribution chart, G-Tech Optoelectronics ranks #2196 out of 2477 companies in the Hardware industry, which is in the bottom quartile relative to peers. Overall, G-Tech Optoelectronics has a GF Score™ of 51/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does G-Tech Optoelectronics' Pretax Margin % compare to APH and GLW?
According to the Hardware industry distribution chart, G-Tech Optoelectronics ranks #2196 out of 2477 companies for Pretax Margin %. This places G-Tech Optoelectronics in the lower half of its industry. The industry median Pretax Margin % is 3.58. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Pretax Margin % for a Hardware company?
The median Pretax Margin % among Hardware companies is 3.58, based on 2,477 companies in the industry. Companies in the top quartile (top 25%) have a Pretax Margin % significantly above this median, while those in the bottom quartile fall well below. However, Pretax 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 Pretax Margin % mean?
A high Pretax Margin % can signal that a stock is expensive relative to its fundamentals. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on G-Tech Optoelectronics and its competitors. For the Hardware industry, the median Pretax Margin % is 3.58 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. G-Tech Optoelectronics's current Pretax Margin % is -28.97%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is G-Tech Optoelectronics stock overvalued right now?
Based on GuruFocus' analysis, G-Tech Optoelectronics (TPE:3149) is currently considered Significantly Overvalued. The stock's GF Value™ is NT$21.98, compared to a current price of NT$87.30 — trading 297.2% above its estimated fair value. The current Pretax Margin % is -28.97%. G-Tech Optoelectronics' overall GF Score™ is 51/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Pretax Margin % calculated?
Pretax Margin % is calculated from a company's financial statements. For G-Tech Optoelectronics (TPE:3149), the current Pretax Margin % is -28.97% 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 G-Tech Optoelectronics (TPE:3149) Overvalued in 2026?

Based on GuruFocus' analysis, G-Tech Optoelectronics stock appears to be overvalued. The current stock price of NT$87.30 is trading 297.2% above its estimated GF Value™ of NT$21.98. GuruFocus considers G-Tech Optoelectronics to be Significantly Overvalued.

Key valuation signals for TPE:3149:

  • Pretax Margin %: -28.97%
  • GF Value™: NT$21.98 vs. price of NT$87.30 (297.2% above fair value)
  • GF Score™: 51/100 with 6 warning signs

No single metric tells the full story. See the TPE:3149 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


G-Tech Optoelectronics Business Description

Address No. 99, Zhongxing Road, Tongluo Township, Miaoli, TWN, 36647
G-Tech Optoelectronics Corp operates in an optoelectronic glass processing market. The company manufactures and markets optical glass products and electronic components. The segments of the company are Smart optoelectronics, that is revenue-generating segment; Smart buildings, and Smart cars. The Smart optoelectronics is in charge of designing, manufacturing, and selling general consumer electronics vehicle glass as well as protective touch control glass for industrial control computers.
51GF Score

Get the complete analysis for TPE:3149

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

NT$87.30
Price
NT$21.98
GF Value