Constellium SEFRA:3OK 71 Operating Margin % is 9.35% as of Mar. 2026, which is 100% above its 10-year median of 4.67. GuruFocus rates FRA:3OK with a GF Score™ of 71/100 and a GF Value™ of €17.69 (Significantly Overvalued). The stock has 4 warning signs investors should review. Among 841 Metals & Mining companies, Constellium SE ranks better than 51.96% on this metric.
Constellium SE (FRA:3OK) 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.
Constellium SE Operating Margin % Related Terms
Constellium SE Operating Margin % Historical Data
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The historical data trend for Constellium SE'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.
FRA:3OK vs KALU, CENX, AA: Operating Margin % Comparison
For the Aluminum subindustry, Constellium SE'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.
Constellium SE Operating Margin % vs Metals & Mining Industry
For the Metals & Mining industry and Basic Materials sector, Constellium SE's Operating Margin % distribution charts can be found below:
* The bar in red indicates where Constellium SE's Operating Margin % falls into.
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.
Constellium SE'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.
Constellium SE (FRA:3OK) has a Operating Margin % of 9.35% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on Constellium SE and its competitors. This is 100% above median its historical median of 4.67. Over the past decade, Constellium SE's Operating Margin % has ranged from 3.71 to 6.88. According to the industry distribution chart, Constellium SE ranks #404 out of 841 companies in the Metals & Mining industry, placing it in the top 48%.
Is Constellium SE's Operating Margin % too high?
Constellium SE's current Operating Margin % of 9.35% is 100% above median its 10-year median of 4.67. Over the past 10 years, this metric has ranged from a low of 3.71 to a high of 6.88. The Metals & Mining industry median Operating Margin % is 5.79. Constellium SE's value of 9.35% is 61.5% above this industry median. Based on the distribution chart, Constellium SE ranks #404 out of 841 companies in the Metals & Mining industry, which is above the industry midpoint. Overall, Constellium SE has a GF Score™ of 71/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Constellium SE's Operating Margin % compare to KALU and CENX?
According to the Metals & Mining industry distribution chart, Constellium SE ranks #404 out of 841 companies for Operating Margin %. This puts Constellium SE in the upper half of its industry. The industry median Operating Margin % is 5.79. Constellium SE's value of 9.35% is 61.5% above this benchmark. Historically, Constellium SE's own Operating Margin % has ranged from 3.71 to 6.88 over the past decade. While the company's 10-year median is 4.67 vs. the industry median of 5.79, Constellium SE 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 Metals & Mining company?
The median Operating Margin % among Metals & Mining companies is 5.79, based on 841 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. Constellium SE's current Operating Margin % of 9.35% is 61.5% 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 Constellium SE and its competitors. For the Metals & Mining industry, the median Operating Margin % is 5.79 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Constellium SE's current Operating Margin % is 9.35%, which is 100% above median its own 10-year median of 4.67. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Constellium SE stock overvalued right now?
Based on GuruFocus' analysis, Constellium SE (FRA:3OK) is currently considered Significantly Overvalued. The stock's GF Value™ is €17.69, compared to a current price of €28.80 — trading 62.8% above its estimated fair value. The current Operating Margin % is 9.35%, which is 100% above median its 10-year median of 4.67 and 61.5% above the Metals & Mining industry median of 5.79. Constellium SE's overall GF Score™ is 71/100 with 4 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 Constellium SE (FRA:3OK), the current Operating Margin % is 9.35% 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 Constellium SE (FRA:3OK) Overvalued in 2026?
Based on GuruFocus' analysis, Constellium SE stock appears to be overvalued.
The current stock price of €28.80 is trading 62.8% above its estimated GF Value™ of €17.69.
GuruFocus considers Constellium SE to be Significantly Overvalued.
Key valuation signals for FRA:3OK:
Operating Margin %: 9.35% (100% above median its 10-year median of 4.67)
GF Value™: €17.69 vs. price of €28.80 (62.8% above fair value)
Industry Position: 61.5% above the Metals & Mining median (#404 of 841)
No single metric tells the full story. See the FRA:3OK stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Constellium SE is engaged in the development, manufacture and sale of a broad range of high value-added specialty rolled and extruded aluminum products to the aerospace, space, defense, packaging, automotive, commercial transportation and general industrial end-markets. Its business model is to add value by converting aluminum into semi-fabricated and, in some instances, fully-fabricated alloyed aluminum products that meet stringent and performance-critical requirements from customers. It operates through three segments: Aerospace & Transportation Operating Segment, Packaging & Automotive Rolled Products Operating Segment, and Automotive Structures & Industry Operating Segment. It serves Aerospace, Packaging and Automotive and operates in the United States, France, Germany and others.
71GF Score
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