Silicon OptronicsTPE:3530 +0.29%71 Pretax Margin % is 18.30% as of Dec. 2025, which is 112% above its 10-year median of 8.64. GuruFocus rates TPE:3530 with a GF Score™ of 71/100 and a GF Value™ of NT$83.79 (Modestly Undervalued). The stock has 3 warning signs investors should review. Among 1,021 Semiconductors companies, Silicon Optronics ranks better than 56.81% on this metric.
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.
Silicon Optronics Pretax Margin % Related Terms
Silicon Optronics Pretax Margin % Historical Data
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The historical data trend for Silicon Optronics'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.
TPE:3530 vs NVDA, AVGO, MU: Pretax Margin % Comparison
For the Semiconductors subindustry, Silicon Optronics'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.
Silicon Optronics Pretax Margin % vs Semiconductors Industry
For the Semiconductors industry and Technology sector, Silicon Optronics's Pretax Margin % distribution charts can be found below:
* The bar in red indicates where Silicon Optronics's Pretax Margin % falls into.
* 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.
Silicon Optronics (TPE:3530) has a Pretax Margin % of 18.30% as of Dec. 2025. Pre-Tax margin is the ratio of total pre-tax income to net sales. View historical data on Silicon Optronics and its competitors. This is 112% above median its historical median of 8.64. According to the industry distribution chart, Silicon Optronics ranks #441 out of 1021 companies in the Semiconductors industry, placing it in the top 43.2%.
Is Silicon Optronics' Pretax Margin % too high?
Silicon Optronics' current Pretax Margin % of 18.30% is 112% above median its 10-year median of 8.64. The Semiconductors industry median Pretax Margin % is 5.07. Silicon Optronics' value of 18.30% is 260.9% above this industry median. Based on the distribution chart, Silicon Optronics ranks #441 out of 1021 companies in the Semiconductors industry, which is above the industry midpoint. Overall, Silicon Optronics has a GF Score™ of 71/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Silicon Optronics' Pretax Margin % compare to NVDA and AVGO?
According to the Semiconductors industry distribution chart, Silicon Optronics ranks #441 out of 1021 companies for Pretax Margin %. This puts Silicon Optronics in the upper half of its industry. The industry median Pretax Margin % is 5.07. Silicon Optronics' value of 18.30% is 260.9% above this benchmark. While the company's 10-year median is 8.64 vs. the industry median of 5.07, Silicon Optronics has consistently been above the industry average. 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 Semiconductors company?
The median Pretax Margin % among Semiconductors companies is 5.07, based on 1,021 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. Silicon Optronics's current Pretax Margin % of 18.30% is 260.9% above the industry median. 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 Silicon Optronics and its competitors. For the Semiconductors industry, the median Pretax Margin % is 5.07 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Silicon Optronics's current Pretax Margin % is 18.30%, which is 112% above median its own 10-year median of 8.64. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Silicon Optronics stock overvalued right now?
Based on GuruFocus' analysis, Silicon Optronics (TPE:3530) is currently considered Modestly Undervalued. The stock's GF Value™ is NT$83.79, compared to a current price of NT$68.40 — trading 18.4% below its estimated fair value. The current Pretax Margin % is 18.30%, which is 112% above median its 10-year median of 8.64 and 260.9% above the Semiconductors industry median of 5.07. Silicon Optronics' overall GF Score™ is 71/100 with 3 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 Silicon Optronics (TPE:3530), the current Pretax Margin % is 18.30% 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 Silicon Optronics (TPE:3530) Overvalued in 2026?
Based on GuruFocus' analysis, Silicon Optronics stock appears to be undervalued.
The current stock price of NT$68.40 is trading 18.4% below its estimated GF Value™ of NT$83.79.
GuruFocus considers Silicon Optronics to be Modestly Undervalued.
Key valuation signals for TPE:3530:
Pretax Margin %: 18.30% (112% above median its 10-year median of 8.64)
GF Value™: NT$83.79 vs. price of NT$68.40 (18.4% below fair value)
Industry Position: 260.9% above the Semiconductors median (#441 of 1021)
No single metric tells the full story. See the TPE:3530 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Silicon Optronics Inc is engaged in the design, development, and sale of complementary metal-oxide semiconductors. Its products include image sensors and shutters. The company derives revenue from complementary metal-oxide semiconductors. Geographically, it operates in Hong Kong, the United States, Taiwan, and other countries, with the majority of revenue deriving from Hong Kong.
71GF Score
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