Tianan Technology GroupTANAF -38.41%15 Operating Margin % is -41.29% as of Dec. 2025. GuruFocus rates TANAF with a GF Score™ of 15/100. The stock has 3 warning signs investors should review. Among 816 Medical Devices & Instruments companies, Tianan Technology Group ranks worse than 67.16% on this metric.
The historical rank and industry rank for Tianan Technology Group's Operating Margin % or its related term are showing as below:
TANAF'
s Operating Margin % Range Over the Past 10 Years
Min: -321.62 Med: -100.81 Max: 25.57
Current: -11.97
TANAF's Operating Margin % is ranked worse than 67.16% of 816
companies
in the Medical Devices & Instruments industry
Industry Median: 3.465
vs TANAF: -11.97
Tianan Technology Group Ltd had lost money in 67% of the time over the past 3quarters.
Tianan Technology Group (OTCPK:TANAF) 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.
Tianan Technology Group Operating Margin % Related Terms
Tianan Technology Group Operating Margin % Historical Data
* Premium members only.
The historical data trend for Tianan Technology Group'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.
TANAF vs INGN, INFU, APYX: Operating Margin % Comparison
For the Medical Devices subindustry, Tianan Technology Group'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.
Tianan Technology Group Operating Margin % vs Medical Devices & Instruments Industry
For the Medical Devices & Instruments industry and Healthcare sector, Tianan Technology Group's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Tianan Technology Group's Operating Margin % falls into.
Tianan Technology Group 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.
Tianan Technology Group'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.
Tianan Technology Group (TANAF) has a Operating Margin % of -41.29% as of Dec. 2025. Operating margin is the ratio of total operating income to net sales. View historical data on Tianan Technology Group and its competitors. According to the industry distribution chart, Tianan Technology Group ranks #548 out of 816 companies in the Medical Devices & Instruments industry, placing it in the top 67.2%.
Is Tianan Technology Group's Operating Margin % too high?
Tianan Technology Group's current Operating Margin % is -41.29%. Based on the distribution chart, Tianan Technology Group ranks #548 out of 816 companies in the Medical Devices & Instruments industry, which is below the industry midpoint. Overall, Tianan Technology Group has a GF Score™ of 15/100, reflecting its overall financial health beyond just this single metric.
How does Tianan Technology Group's Operating Margin % compare to INGN and INFU?
According to the Medical Devices & Instruments industry distribution chart, Tianan Technology Group ranks #548 out of 816 companies for Operating Margin %. This places Tianan Technology Group in the lower half of its industry. The industry median Operating Margin % is 3.47. 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 3.47, 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. 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 Tianan Technology Group and its competitors. For the Medical Devices & Instruments industry, the median Operating Margin % is 3.47 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Tianan Technology Group's current Operating Margin % is -41.29%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Tianan Technology Group stock overvalued right now?
Tianan Technology Group (TANAF) has a current Operating Margin % of -41.29%. The current Operating Margin % is -41.29%. Tianan Technology Group's overall GF Score™ is 15/100 with 3 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 Tianan Technology Group (TANAF), the current Operating Margin % is -41.29% 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.
Tianan Technology Group Ltd is focused on graphene production enterprises and is engaged in the health therapy industry. It utilizes the far-infrared heat therapy characteristics of graphene, which is incorporated into its products. Its products include Graphene Far Infrared Energy Room, Pure Graphene Heating Music Blanket, Graphene Pillow, Pure Graphene Heating Knee Compartment, Pure Graphene Heating Knee Pads, Pure Graphene Eye Mask, Intelligent graphene suspension moxibustion instrument, and Pure Graphene Eye Mask. The Company operates in one reportable business segment: Healthcare.
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