Idemitsu Kosan CoIDKOF 67 Net Margin % is 5.52% as of Mar. 2026, which is 133% above its 10-year median of 2.37. GuruFocus rates IDKOF with a GF Score™ of 67/100 and a GF Value™ of $6.72 (Modestly Overvalued). The stock has 4 warning signs investors should review. Among 916 Oil & Gas companies, Idemitsu Kosan Co ranks worse than 56% on this metric.
The historical rank and industry rank for Idemitsu Kosan Co's Net Margin % or its related term are showing as below:
IDKOF'
s Net Margin % Range Over the Past 10 Years
Min: -0.38 Med: 2.37 Max: 4.35
Current: 2.12
IDKOF's Net Margin % is ranked worse than 56% of 916
companies
in the Oil & Gas industry
Industry Median: 3.435
vs IDKOF: 2.12
Idemitsu Kosan Co (OTCPK:IDKOF) 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.
Idemitsu Kosan Co Net Margin % Related Terms
Idemitsu Kosan Co Net Margin % Historical Data
* Premium members only.
The historical data trend for Idemitsu Kosan Co's Net 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.
For the Oil & Gas Refining & Marketing subindustry, Idemitsu Kosan Co'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.
Idemitsu Kosan Co Net Margin % vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Idemitsu Kosan Co's Net Margin % distribution charts can be found below:
* The bar in red indicates where Idemitsu Kosan Co'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.
Idemitsu Kosan Co (IDKOF) has a Net Margin % of 5.52% as of Mar. 2026. Net margin is the ratio of total net income to net sales. View historical data on Idemitsu Kosan Co and its competitors. This is 133% above median its historical median of 2.37. According to the industry distribution chart, Idemitsu Kosan Co ranks #513 out of 916 companies in the Oil & Gas industry, placing it in the top 56%.
Is Idemitsu Kosan Co's Net Margin % too high?
Idemitsu Kosan Co's current Net Margin % of 5.52% is 133% above median its 10-year median of 2.37. The Oil & Gas industry median Net Margin % is 3.44. Idemitsu Kosan Co's value of 5.52% is 60.7% above this industry median. Based on the distribution chart, Idemitsu Kosan Co ranks #513 out of 916 companies in the Oil & Gas industry, which is below the industry midpoint. Overall, Idemitsu Kosan Co has a GF Score™ of 67/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Idemitsu Kosan Co's Net Margin % compare to VLO and MPC?
According to the Oil & Gas industry distribution chart, Idemitsu Kosan Co ranks #513 out of 916 companies for Net Margin %. This places Idemitsu Kosan Co in the lower half of its industry. The industry median Net Margin % is 3.44. Idemitsu Kosan Co's value of 5.52% is 60.7% above this benchmark. While the company's 10-year median is 2.37 vs. the industry median of 3.44, Idemitsu Kosan Co 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 Net Margin % for an Oil & Gas company?
The median Net Margin % among Oil & Gas companies is 3.44, based on 916 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. Idemitsu Kosan Co's current Net Margin % of 5.52% is 60.7% 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 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 Idemitsu Kosan Co and its competitors. For the Oil & Gas industry, the median Net Margin % is 3.44 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Idemitsu Kosan Co's current Net Margin % is 5.52%, which is 133% above median its own 10-year median of 2.37. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Idemitsu Kosan Co stock overvalued right now?
Based on GuruFocus' analysis, Idemitsu Kosan Co (IDKOF) is currently considered Modestly Overvalued. The stock's GF Value™ is $6.72, compared to a current price of $8.01 — trading 19.2% above its estimated fair value. The current Net Margin % is 5.52%, which is 133% above median its 10-year median of 2.37 and 60.7% above the Oil & Gas industry median of 3.44. Idemitsu Kosan Co's overall GF Score™ is 67/100 with 4 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 Idemitsu Kosan Co (IDKOF), the current Net Margin % is 5.52% 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 Idemitsu Kosan Co (IDKOF) Overvalued in 2026?
Based on GuruFocus' analysis, Idemitsu Kosan Co stock appears to be overvalued.
The current stock price of $8.01 is trading 19.2% above its estimated GF Value™ of $6.72.
GuruFocus considers Idemitsu Kosan Co to be Modestly Overvalued.
Key valuation signals for IDKOF:
Net Margin %: 5.52% (133% above median its 10-year median of 2.37)
GF Value™: $6.72 vs. price of $8.01 (19.2% above fair value)
Industry Position: 60.7% above the Oil & Gas median (#513 of 916)
No single metric tells the full story. See the IDKOF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Idemitsu Kosan Co Ltd engages in a variety of activities globally that include petroleum products, oil exploration and production, coal, and other businesses. The company operates through five segments. The Basic Chemicals segment makes and sells olefins and aroma products. Electricity/Renewable Energy covers thermal, solar, and wind power generation, electricity sales, and solar business. Fuel Oil handles production, trading, and import/export of refined petroleum. The Highly Functional Materials segment includes lubricants, chemicals, electronic materials, paving materials, and agri-bio. The Resource segment explores, develops, and sells crude oil, natural gas, and coal. Others cover insurance and intra-group services. It generates the majority of its revenue from the Fuel oil segment.
67GF Score
Get the complete analysis for IDKOF
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
IDKOF has been successfully added to your 
