Siam Wellness Group PCLBKK:SPA 83 Operating Margin % is 16.21% as of Mar. 2026, which is 20% below its 10-year median of 20.28. GuruFocus rates BKK:SPA with a GF Score™ of 83/100 and a GF Value™ of ฿7.52 (Significantly Undervalued). The stock has 2 warning signs investors should review. Among 97 Personal Services companies, Siam Wellness Group PCL ranks better than 80.41% on this metric.
Siam Wellness Group PCL (BKK:SPA) 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.
Siam Wellness Group PCL Operating Margin % Related Terms
Siam Wellness Group PCL Operating Margin % Historical Data
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The historical data trend for Siam Wellness 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:SPA vs ROL, SCI, FTDR: Operating Margin % Comparison
For the Personal Services subindustry, Siam Wellness 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.
Siam Wellness Group PCL Operating Margin % vs Personal Services Industry
For the Personal Services industry and Consumer Cyclical sector, Siam Wellness Group PCL's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Siam Wellness Group PCL's Operating Margin % falls into.
Siam Wellness 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.
Siam Wellness 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.
Siam Wellness Group PCL (BKK:SPA) has a Operating Margin % of 16.21% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on Siam Wellness Group PCL and its competitors. This is 20% below median its historical median of 20.28. According to the industry distribution chart, Siam Wellness Group PCL ranks #19 out of 97 companies in the Personal Services industry, placing it in the top 19.6%.
Is Siam Wellness Group PCL's Operating Margin % too high?
Siam Wellness Group PCL's current Operating Margin % of 16.21% is 20% below median its 10-year median of 20.28. The Personal Services industry median Operating Margin % is 6.61. Siam Wellness Group PCL's value of 16.21% is 145.2% above this industry median. Based on the distribution chart, Siam Wellness Group PCL ranks #19 out of 97 companies in the Personal Services industry, which is in the top quartile — a strong position relative to peers. Overall, Siam Wellness Group PCL has a GF Score™ of 83/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Siam Wellness Group PCL's Operating Margin % compare to ROL and SCI?
According to the Personal Services industry distribution chart, Siam Wellness Group PCL ranks #19 out of 97 companies for Operating Margin %. This places Siam Wellness Group PCL in the top 20% of its industry — outperforming the majority of peers. The industry median Operating Margin % is 6.61. Siam Wellness Group PCL's value of 16.21% is 145.2% above this benchmark. While the company's 10-year median is 20.28 vs. the industry median of 6.61, Siam Wellness 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 Personal Services company?
The median Operating Margin % among Personal Services companies is 6.61, based on 97 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. Siam Wellness Group PCL's current Operating Margin % of 16.21% is 145.2% 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 Siam Wellness Group PCL and its competitors. For the Personal Services industry, the median Operating Margin % is 6.61 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Siam Wellness Group PCL's current Operating Margin % is 16.21%, which is 20% below median its own 10-year median of 20.28. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Siam Wellness Group PCL stock overvalued right now?
Based on GuruFocus' analysis, Siam Wellness Group PCL (BKK:SPA) is currently considered Significantly Undervalued. The stock's GF Value™ is ฿7.52, compared to a current price of ฿3.32 — trading 55.9% below its estimated fair value. The current Operating Margin % is 16.21%, which is 20% below median its 10-year median of 20.28 and 145.2% above the Personal Services industry median of 6.61. Siam Wellness Group PCL's overall GF Score™ is 83/100 with 2 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 Siam Wellness Group PCL (BKK:SPA), the current Operating Margin % is 16.21% as of Mar. 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 Siam Wellness Group PCL (BKK:SPA) Overvalued in 2026?
Based on GuruFocus' analysis, Siam Wellness Group PCL stock appears to be undervalued.
The current stock price of ฿3.32 is trading 55.9% below its estimated GF Value™ of ฿7.52.
GuruFocus considers Siam Wellness Group PCL to be Significantly Undervalued.
Key valuation signals for BKK:SPA:
Operating Margin %: 16.21% (20% below median its 10-year median of 20.28)
GF Value™: ฿7.52 vs. price of ฿3.32 (55.9% below fair value)
Industry Position: 145.2% above the Personal Services median (#19 of 97)
No single metric tells the full story. See the BKK:SPA stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Siam Wellness Group PCL is a Thailand-based company and is principally engaged in the spa business. The business is organized into three segments: Spa services, which operates day spa and destination spa. Also, provides spa management and spa consultancy services; Sales of spa products and healthy products, which distributes natural spa products both and spa equipment for domestic and international markets. and Hotel and restaurant which operates boutique resorts and restaurants. Key revenue is earned from providing spa services. The Group operates in Thailand.
83GF Score
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