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Siamrajathanee PCLBKK:SO +0.43%86 3-Year ROIIC % is 7.70 as of Dec. 2025, which is 37% above its 10-year median of 5.63. GuruFocus rates BKK:SO with a GF Score™ of 86/100 and a GF Value™ of ฿5.71 (Modestly Undervalued). The stock has 5 warning signs investors should review. Among 1,012 Business Services companies, Siamrajathanee PCL ranks better than 55.34% on this metric.
3-Year Return on Invested Incremental Capital (3-Year ROIIC %) measures the change in earnings as a percentage of change in investment over 3-year.
Siamrajathanee PCL's 3-Year ROIIC % for the quarter that ended in Dec. 2025 was 7.70%. High ROIIC is generally an indication that your business is capital efficient or has a higher operating leverage.
The industry rank for Siamrajathanee PCL's 3-Year ROIIC % or its related term are showing as below:
BKK:SO's 3-Year ROIIC % is ranked better than 55.34% of 1012
companies
in the Business Services industry
Industry Median: 5.045
vs BKK:SO: 7.70
Return on Incremental Invested Capital (ROIIC) is an extension of Return on Investment Capital (ROIC). ROIC % tells investors how efficiently that profitability is earned per dollar of company capital. ROIIC narrows the focus even further and shows how profitable each additional unit of capital investment could be. ROIIC % is a more powerful metric than ROIC because it measures how much money the company can generate going forward on future capital investments.
High ROIIC is generally an indication that your business is capital efficient or has a higher operating leverage.
Be Aware
It's important to keep in mind that when tracking ROIIC, the metric is better suited to forecasting the trend of future returns rather than measuring current return on investment.
Siamrajathanee PCL 3-Year ROIIC % Related Terms
Siamrajathanee PCL 3-Year ROIIC % Historical Data
* Premium members only.
The historical data trend for Siamrajathanee PCL's 3-Year ROIIC % 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:SO vs CTAS, CPRT, ULS: 3-Year ROIIC % Comparison
For the Specialty Business Services subindustry, Siamrajathanee PCL's 3-Year ROIIC %, along with its competitors' market caps and 3-Year ROIIC % 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.
Siamrajathanee PCL 3-Year ROIIC % vs Business Services Industry
For the Business Services industry and Industrials sector, Siamrajathanee PCL's 3-Year ROIIC % distribution charts can be found below:
* The bar in red indicates where Siamrajathanee PCL's 3-Year ROIIC % 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.
** Annual data of NOPAT and Invested Capital was used to calculate 3-Year ROIIC %.
*** Please be aware that the ROIIC (Return on Invested Capital) calculations are based on company-level data using the primary share class. The calculated data provided is for demonstration purposes and may slightly differ from the results displayed in the title due to potential variations caused by currency exchange rate differences throughout the year.
Siamrajathanee PCL (BKK:SO) has a 3-Year ROIIC % of 7.70 as of Dec. 2025. 3-Year ROIIC % measures the change in earnings as a percentage of change in investment over 3-year. View historical data on Siamrajathanee PCL and its competitors. This is 37% above median its historical median of 5.63. According to the industry distribution chart, Siamrajathanee PCL ranks #452 out of 1012 companies in the Business Services industry, placing it in the top 44.7%.
Is Siamrajathanee PCL's 3-Year ROIIC % too high?
Siamrajathanee PCL's current 3-Year ROIIC % of 7.70 is 37% above median its 10-year median of 5.63. The Business Services industry median 3-Year ROIIC % is 5.05. Siamrajathanee PCL's value of 7.70 is 52.6% above this industry median. Based on the distribution chart, Siamrajathanee PCL ranks #452 out of 1012 companies in the Business Services industry, which is above the industry midpoint. Overall, Siamrajathanee PCL has a GF Score™ of 86/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Siamrajathanee PCL's 3-Year ROIIC % compare to CTAS and CPRT?
According to the Business Services industry distribution chart, Siamrajathanee PCL ranks #452 out of 1012 companies for 3-Year ROIIC %. This puts Siamrajathanee PCL in the upper half of its industry. The industry median 3-Year ROIIC % is 5.05. Siamrajathanee PCL's value of 7.70 is 52.6% above this benchmark. While the company's 10-year median is 5.63 vs. the industry median of 5.05, Siamrajathanee 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 3-Year ROIIC % for a Business Services company?
The median 3-Year ROIIC % among Business Services companies is 5.05, based on 1,012 companies in the industry. Companies in the top quartile (top 25%) have a 3-Year ROIIC % significantly above this median, while those in the bottom quartile fall well below. However, 3-Year ROIIC % should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Siamrajathanee PCL's current 3-Year ROIIC % of 7.70 is 52.6% 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 3-Year ROIIC % mean?
A high 3-Year ROIIC % can signal that a stock is expensive relative to its fundamentals. 3-Year ROIIC % measures the change in earnings as a percentage of change in investment over 3-year. View historical data on Siamrajathanee PCL and its competitors. For the Business Services industry, the median 3-Year ROIIC % is 5.05 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Siamrajathanee PCL's current 3-Year ROIIC % is 7.70, which is 37% above median its own 10-year median of 5.63. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Siamrajathanee PCL stock overvalued right now?
Based on GuruFocus' analysis, Siamrajathanee PCL (BKK:SO) is currently considered Modestly Undervalued. The stock's GF Value™ is ฿5.71, compared to a current price of ฿4.66 — trading 18.4% below its estimated fair value. The current 3-Year ROIIC % is 7.70, which is 37% above median its 10-year median of 5.63 and 52.6% above the Business Services industry median of 5.05. Siamrajathanee PCL's overall GF Score™ is 86/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is 3-Year ROIIC % calculated?
3-Year ROIIC % is calculated from a company's financial statements. For Siamrajathanee PCL (BKK:SO), the current 3-Year ROIIC % is 7.70 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 Siamrajathanee PCL (BKK:SO) Overvalued in 2026?
Based on GuruFocus' analysis, Siamrajathanee PCL stock appears to be undervalued.
The current stock price of ฿4.66 is trading 18.4% below its estimated GF Value™ of ฿5.71.
GuruFocus considers Siamrajathanee PCL to be Modestly Undervalued.
Key valuation signals for BKK:SO:
3-Year ROIIC %: 7.70 (37% above median its 10-year median of 5.63)
GF Value™: ฿5.71 vs. price of ฿4.66 (18.4% below fair value)
Industry Position: 52.6% above the Business Services median (#452 of 1012)
No single metric tells the full story. See the BKK:SO stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Siamrajathanee PCL is an outsourcing services company in Thailand for both the government and private sectors. It is principally engaged in providing outsourcing services and vehicle operating lease services. The company, along with its subsidiaries, is organized into business units based on its products and services and has the following reportable segments: the Outsourcing service segment, the Rental service segment, and others. A majority of its revenue is generated from the Outsourcing service segment, which provides services like Workforce management, corporate car rental, landscape maintenance, and industrial waste disposal. Geographically, the group operates only in Thailand.
86GF Score
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