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Thai Optical Group PCLBKK:TOG 89 Operating Margin % is 11.50% as of Jun. 2026, which is 5% below its 10-year median of 12.05. 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 816 Medical Devices & Instruments companies, Thai Optical Group PCL ranks better than 69.98% on this metric.
Thai Optical Group PCL operating margin is expanding. Margin expansion is usually a good sign.
The historical rank and industry rank for Thai Optical Group PCL's Operating Margin % or its related term are showing as below:
BKK:TOG'
s Operating Margin % Range Over the Past 10 Years
Min: 3.2 Med: 12.05 Max: 16.34
Current: 12.1
BKK:TOG's Operating Margin % is ranked better than 69.98% of 816
companies
in the Medical Devices & Instruments industry
Industry Median: 3.23
vs BKK:TOG: 12.10
Thai Optical Group PCL's 5-Year Average Operating Margin % Growth Rate was 22.60% per year.
Thai Optical Group PCL (BKK:TOG) 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 Nokias 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.
Thai Optical Group PCL Operating Margin % Related Terms
Thai Optical Group PCL Operating Margin % Historical Data
* Premium members only.
The historical data trend for Thai Optical Group PCL'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.
BKK:TOG vs ISRG, BDX, MDLN: Operating Margin % Comparison
For the Medical Instruments & Supplies subindustry, Thai Optical Group PCL'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.
Thai Optical Group PCL Operating Margin % vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Thai Optical Group PCL's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Thai Optical Group PCL's Operating Margin % falls into.
Thai Optical Group PCL 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.
Thai Optical Group PCL's Operating Margin % for the fiscal year that ended in Dec. 2025 is calculated as
* 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 Operating Margin % of 11.50% as of Jun. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on Thai Optical Group PCL and its competitors. This is near median its historical median of 12.05. Over the past decade, Thai Optical Group PCL's Operating Margin % has ranged from 3.20 to 16.34. According to the industry distribution chart, Thai Optical Group PCL ranks #245 out of 816 companies in the Medical Devices & Instruments industry, placing it in the top 30%.
Is Thai Optical Group PCL's Operating Margin % too high?
Thai Optical Group PCL's current Operating Margin % of 11.50% is near median its 10-year median of 12.05. Over the past 10 years, this metric has ranged from a low of 3.20 to a high of 16.34. The Medical Devices & Instruments industry median Operating Margin % is 3.23. Thai Optical Group PCL's value of 11.50% is 256% above this industry median. Based on the distribution chart, Thai Optical Group PCL ranks #245 out of 816 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 Operating Margin % compare to ISRG and BDX?
According to the Medical Devices & Instruments industry distribution chart, Thai Optical Group PCL ranks #245 out of 816 companies for Operating Margin %. This puts Thai Optical Group PCL in the upper half of its industry. The industry median Operating Margin % is 3.23. Thai Optical Group PCL's value of 11.50% is 256% above this benchmark. Historically, Thai Optical Group PCL's own Operating Margin % has ranged from 3.20 to 16.34 over the past decade. While the company's 10-year median is 12.05 vs. the industry median of 3.23, Thai Optical Group PCL 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 Operating Margin % for a Medical Devices & Instruments company?
The median Operating Margin % among Medical Devices & Instruments companies is 3.23, based on 816 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. Thai Optical Group PCL's current Operating Margin % of 11.50% is 256% 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 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 Thai Optical Group PCL and its competitors. For the Medical Devices & Instruments industry, the median Operating Margin % is 3.23 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Thai Optical Group PCL's current Operating Margin % is 11.50%, which is near median its own 10-year median of 12.05. 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 Operating Margin % is 11.50%, which is near median its 10-year median of 12.05 and 256% above the Medical Devices & Instruments industry median of 3.23. 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 Operating Margin % calculated?
Operating Margin % is calculated from a company's financial statements. For Thai Optical Group PCL (BKK:TOG), the current Operating Margin % is 11.50% 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:
Operating Margin %: 11.50% (near median its 10-year median of 12.05)
GF Value™: ฿9.76 vs. price of ฿7.30 (25.2% below fair value)
Industry Position: 256% above the Medical Devices & Instruments median (#245 of 816)
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
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