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.
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.
Thai Optical Group PCLBKK:TOG 89 Net Margin % is -3.77% as of Jun. 2026. GuruFocus rates BKK:TOG with a GF Score™ of 89/100 and a GF Value™ of ฿9.76 (Modestly Undervalued). The stock has 5 warning signs investors should review. Among 817 Medical Devices & Instruments companies, Thai Optical Group PCL ranks better than 65.48% on this metric.
The historical rank and industry rank for Thai Optical Group PCL's Net Margin % or its related term are showing as below:
BKK:TOG'
s Net Margin % Range Over the Past 10 Years
Min: 3.74 Med: 10.82 Max: 14.22
Current: 7.58
BKK:TOG's Net Margin % is ranked better than 65.48% of 817
companies
in the Medical Devices & Instruments industry
Industry Median: 2.2
vs BKK:TOG: 7.58
Thai Optical Group PCL (BKK:TOG) Net Margin % Explanation
Although Net Income and Earnings-per-Share (EPS) are the most widely used parameter in measuring a company's profitability and valuation, it is the least reliable. The reason is that reported earnings can be manipulated easily by adjusting any numbers such as Depreciation, Depletion and Amotorization and non-recurring items.
But the long term trend of the net margin is a good indicator of the competitiveness and health of the business.
Thai Optical Group PCL Net Margin % Related Terms
Thai Optical Group PCL Net Margin % Historical Data
* 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.
BKK:TOG vs ISRG, BDX, MDLN: Net Margin % Comparison
For the Medical Instruments & Supplies subindustry, Thai Optical Group PCL's Net Margin %, along with its competitors' market caps and Net 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.
Thai Optical Group PCL Net Margin % vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Thai Optical Group PCL's Net Margin % distribution charts can be found below:
* The bar in red indicates where Thai Optical Group PCL's Net 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.
Thai Optical Group PCL (BKK:TOG) has a Net Margin % of -3.77% as of Jun. 2026. Net margin is the ratio of total net income to net sales. View historical data on Thai Optical Group PCL and its competitors. Over the past decade, Thai Optical Group PCL's Net Margin % has ranged from 3.74 to 14.22. According to the industry distribution chart, Thai Optical Group PCL ranks #282 out of 817 companies in the Medical Devices & Instruments industry, placing it in the top 34.5%.
Is Thai Optical Group PCL's Net Margin % too high?
Thai Optical Group PCL's current Net Margin % is -3.77%. Over the past 10 years, this metric has ranged from a low of 3.74 to a high of 14.22. Based on the distribution chart, Thai Optical Group PCL ranks #282 out of 817 companies in the Medical Devices & Instruments industry, which is above the industry midpoint. Overall, Thai Optical Group PCL has a GF Score™ of 89/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Thai Optical Group PCL's Net Margin % compare to ISRG and BDX?
According to the Medical Devices & Instruments industry distribution chart, Thai Optical Group PCL ranks #282 out of 817 companies for Net Margin %. This puts Thai Optical Group PCL in the upper half of its industry. The industry median Net Margin % is 2.20. Historically, Thai Optical Group PCL's own Net Margin % has ranged from 3.74 to 14.22 over the past decade. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Net Margin % for a Medical Devices & Instruments company?
The median Net Margin % among Medical Devices & Instruments companies is 2.20, based on 817 companies in the industry. Companies in the top quartile (top 25%) have a Net Margin % significantly above this median, while those in the bottom quartile fall well below. However, Net 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 Net Margin % mean?
A high Net Margin % can signal that a stock is expensive relative to its fundamentals. Net margin is the ratio of total net income to net sales. View historical data on Thai Optical Group PCL and its competitors. For the Medical Devices & Instruments industry, the median Net Margin % is 2.20 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Thai Optical Group PCL's current Net Margin % is -3.77%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Thai Optical Group PCL stock overvalued right now?
Based on GuruFocus' analysis, Thai Optical Group PCL (BKK:TOG) is currently considered Modestly Undervalued. The stock's GF Value™ is ฿9.76, compared to a current price of ฿7.30 — trading 25.2% below its estimated fair value. The current Net Margin % is -3.77%. Thai Optical Group PCL's overall GF Score™ is 89/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Net Margin % calculated?
Net Margin % is calculated from a company's financial statements. For Thai Optical Group PCL (BKK:TOG), the current Net Margin % is -3.77% as of Jun. 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 Thai Optical Group PCL (BKK:TOG) Overvalued in 2026?
Based on GuruFocus' analysis, Thai Optical Group PCL stock appears to be undervalued.
The current stock price of ฿7.30 is trading 25.2% below its estimated GF Value™ of ฿9.76.
GuruFocus considers Thai Optical Group PCL to be Modestly Undervalued.
Key valuation signals for BKK:TOG:
Net Margin %: -3.77%
GF Value™: ฿9.76 vs. price of ฿7.30 (25.2% below fair value)
No single metric tells the full story. See the BKK:TOG stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Thai Optical Group PCL is engaged in the manufacturing and distribution of plastic lenses and related products. The company's products include Organic lenses, Mineral lenses, and Prescription Lenses. It has two reporting segments: Plastic and glass lens, which produce and sell optical lenses; Other products and services which are the sale of the glass mold, trading goods purchased for resale, glasses assembly services, and surface treatments. The majority of the revenue is generated from the plastic and glass lens segment. The company also operates in Europe, Australia, Asia and Pacific, America, Africa, and the Middle East. The majority of revenue is from America.
89GF Score
Get the complete analysis for BKK:TOG
Net Margin % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
BKK:TOG has been successfully added to your 
