United Utilities GroupMEX:UUN 82 Operating Margin % is 41.18% as of Mar. 2026, which is 19% above its 10-year median of 34.55. GuruFocus rates MEX:UUN with a GF Score™ of 82/100 and a GF Value™ of MXN268.06. The stock has 5 warning signs investors should review. Among 499 Utilities - Regulated companies, United Utilities Group ranks better than 94.19% on this metric.
United Utilities Group PLC operating margin is expanding. Margin expansion is usually a good sign.
The historical rank and industry rank for United Utilities Group's Operating Margin % or its related term are showing as below:
MEX:UUN'
s Operating Margin % Range Over the Past 10 Years
Min: 24.73 Med: 34.55 Max: 42.06
Current: 42.06
MEX:UUN's Operating Margin % is ranked better than 94.19% of 499
companies
in the Utilities - Regulated industry
Industry Median: 14.97
vs MEX:UUN: 42.06
United Utilities Group's 5-Year Average Operating Margin % Growth Rate was 2.00% per year.
United Utilities Group (MEX:UUN) 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.
United Utilities Group Operating Margin % Related Terms
United Utilities Group Operating Margin % Historical Data
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The historical data trend for United Utilities 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.
MEX:UUN vs AWK, WTRG, AWR: Operating Margin % Comparison
For the Utilities - Regulated Water subindustry, United Utilities 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.
United Utilities Group Operating Margin % vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, United Utilities Group's Operating Margin % distribution charts can be found below:
* The bar in red indicates where United Utilities Group's Operating Margin % falls into.
United Utilities 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.
United Utilities Group's Operating Margin % for the fiscal year that ended in Mar. 2026 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.
United Utilities Group (MEX:UUN) has a Operating Margin % of 41.18% as of Mar. 2026. Operating margin is the ratio of total operating income to net sales. View historical data on United Utilities Group and its competitors. This is 19% above median its historical median of 34.55. Over the past decade, United Utilities Group's Operating Margin % has ranged from 24.73 to 42.06. According to the industry distribution chart, United Utilities Group ranks #29 out of 499 companies in the Utilities - Regulated industry, placing it in the top 5.8%.
Is United Utilities Group's Operating Margin % too high?
United Utilities Group's current Operating Margin % of 41.18% is 19% above median its 10-year median of 34.55. Over the past 10 years, this metric has ranged from a low of 24.73 to a high of 42.06. The Utilities - Regulated industry median Operating Margin % is 14.97. United Utilities Group's value of 41.18% is 175.1% above this industry median. Based on the distribution chart, United Utilities Group ranks #29 out of 499 companies in the Utilities - Regulated industry, which is in the top quartile — a strong position relative to peers. Overall, United Utilities Group has a GF Score™ of 82/100, reflecting its overall financial health beyond just this single metric.
How does United Utilities Group's Operating Margin % compare to AWK and WTRG?
According to the Utilities - Regulated industry distribution chart, United Utilities Group ranks #29 out of 499 companies for Operating Margin %. This places United Utilities Group in the top 6% of its industry — outperforming the majority of peers. The industry median Operating Margin % is 14.97. United Utilities Group's value of 41.18% is 175.1% above this benchmark. Historically, United Utilities Group's own Operating Margin % has ranged from 24.73 to 42.06 over the past decade. While the company's 10-year median is 34.55 vs. the industry median of 14.97, United Utilities Group 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 an Utilities - Regulated company?
The median Operating Margin % among Utilities - Regulated companies is 14.97, based on 499 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. United Utilities Group's current Operating Margin % of 41.18% is 175.1% 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 United Utilities Group and its competitors. For the Utilities - Regulated industry, the median Operating Margin % is 14.97 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. United Utilities Group's current Operating Margin % is 41.18%, which is 19% above median its own 10-year median of 34.55. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is United Utilities Group stock overvalued right now?
United Utilities Group (MEX:UUN) has a current Operating Margin % of 41.18%. The stock's GF Value™ is MXN268.06, compared to a current price of MXN243.19 — trading 9.3% below its estimated fair value. The current Operating Margin % is 41.18%, which is 19% above median its 10-year median of 34.55 and 175.1% above the Utilities - Regulated industry median of 14.97. United Utilities Group's overall GF Score™ is 82/100 with 5 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 United Utilities Group (MEX:UUN), the current Operating Margin % is 41.18% 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 United Utilities Group (MEX:UUN) Overvalued in 2026?
Based on GuruFocus' analysis, United Utilities Group stock appears to be undervalued.
The current stock price of MXN243.19 is trading 9.3% below its estimated GF Value™ of MXN268.06.
Key valuation signals for MEX:UUN:
Operating Margin %: 41.18% (19% above median its 10-year median of 34.55)
GF Value™: MXN268.06 vs. price of MXN243.19 (9.3% below fair value)
Industry Position: 175.1% above the Utilities - Regulated median (#29 of 499)
No single metric tells the full story. See the MEX:UUN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
United Utilities Group is primarily a holding company for United Utilities Water, the country's largest regulated water and wastewater utility, serving customers in northwest England, including Manchester and Liverpool.
82GF Score
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