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Naturgy Energy GroupGASNF -5.25%69 Graham Number is $16.18 as of Dec. 2025, which is 678% above its 10-year median of 2.08. GuruFocus rates GASNF with a GF Score™ of 69/100 and a GF Value™ of $25.48 (Modestly Overvalued). The stock has 7 warning signs investors should review. Among 417 Utilities - Regulated companies, Naturgy Energy Group ranks worse than 85.37% on this metric.
Graham Number is a figure that measures a stock's fundamental value by taking into account the company's earnings per share and book value per share. The Graham number is the upper bound of the price range that a defensive investor should pay for the stock. According to the theory, any stock price below the Graham number is considered undervalued, and thus worth investing in.
As of today (2026-07-14), the stock price of Naturgy Energy Group is $31.901. Naturgy Energy Group's graham number for the quarter that ended in Dec. 2025 was $16.18. Therefore, Naturgy Energy Group's Price to Graham Number ratio for today is 1.97.
The historical rank and industry rank for Naturgy Energy Group's Graham Number or its related term are showing as below:
GASNF'
s Price-to-Graham-Number Range Over the Past 10 Years
Min: 1.56 Med: 2.08 Max: 12.24
Current: 2.02
During the past 13 years, the highest Price to Graham Number ratio of Naturgy Energy Group was 12.24. The lowest was 1.56. And the median was 2.08.
GASNF's Price-to-Graham-Number is ranked worse than 85.37% of 417
companies
in the Utilities - Regulated industry
Industry Median: 1.12
vs GASNF: 2.02
Graham Number is a combination of asset valuation and earnings power valuation. It is a very conservative way of valuing a stock.
Naturgy Energy Group (OTCPK:GASNF) Graham Number Explanation
Ben Graham actually did not publish a formula like this. But he wrote in The Intelligent Investor (1948 version) regarding to the criteria for purchases:
Current price should not be more than 15 times average earnings of the past three years.
Current price should not be more than 1.5 times the book value last reported. However, a multiplier of earnings below 15 could justify a correspondingly higher multiplier of assets. As a rule of thumb we suggest that the product of the multiplier times the ratio of price to book value should not exceed 22.5. (This figure corresponds to 15 times earnings and 1.5 times book value. It would admit an issue selling at only 9 times earnings and 2.5 times asset value, etc.)
Unlike valuation methods such as DCF or Discounted Earnings, the Graham number does not take growth into the valuation. Unlike the valuation methods based on book value alone, it takes into account the earnings power. Therefore, the Graham Number is a combination of asset valuation and earnings power valuation.
In general, the Graham number is a very conservative way of valuing a stock. It cannot be applied to companies with negative book values.
Naturgy Energy Group's Price to Graham number Ratio for today is calculated as
Price to Graham number
=
Share Price (Today)
/
Graham number (Q: Dec. 2025 )
=
31.901
/
16.18
=
1.97
* 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.
Be Aware
Please keep these in mind:
1. Graham Number does not take growth into account. Therefore it underestimates the values of the companies that have good earnings growth. We feel that if the earnings per share grows more than 10% a year, Graham Number underestimates the value.
2. Graham Number punishes the companies that have temporarily low earnings. Therefore, an average of earnings makes more sense in the calculation of Graham Number.
3. Graham Numbers underestimates companies that are light with book.
Naturgy Energy Group Graham Number Related Terms
Naturgy Energy Group Graham Number Historical Data
* Premium members only.
The historical data trend for Naturgy Energy Group's Graham Number 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 Utilities - Regulated Gas subindustry, Naturgy Energy Group's Price-to-Graham-Number, along with its competitors' market caps and Price-to-Graham-Number 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.
Naturgy Energy Group Price-to-Graham-Number vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, Naturgy Energy Group's Price-to-Graham-Number distribution charts can be found below:
* The bar in red indicates where Naturgy Energy Group's Price-to-Graham-Number 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.
Naturgy Energy Group (GASNF) has a Graham Number of $16.18 as of Dec. 2025. The Graham Number values a company based on its per-share earnings and book value. View historical data on Naturgy Energy Group and its competitors. This is 678% above median its historical median of 2.08. Over the past decade, Naturgy Energy Group's Graham Number has ranged from 1.56 to 12.24. According to the industry distribution chart, Naturgy Energy Group ranks #356 out of 417 companies in the Utilities - Regulated industry, placing it in the top 85.4%.
Is Naturgy Energy Group's Graham Number too high?
Naturgy Energy Group's current Graham Number of $16.18 is 678% above median its 10-year median of 2.08. Over the past 10 years, this metric has ranged from a low of 1.56 to a high of 12.24. The Utilities - Regulated industry median Graham Number is 1.12. Naturgy Energy Group's value of $16.18 is 1344.6% above this industry median. Based on the distribution chart, Naturgy Energy Group ranks #356 out of 417 companies in the Utilities - Regulated industry, which is in the bottom quartile relative to peers. Overall, Naturgy Energy Group has a GF Score™ of 69/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Naturgy Energy Group's Graham Number compare to ATO and NI?
According to the Utilities - Regulated industry distribution chart, Naturgy Energy Group ranks #356 out of 417 companies for Graham Number. This places Naturgy Energy Group in the lower half of its industry. The industry median Graham Number is 1.12. Naturgy Energy Group's value of $16.18 is 1344.6% above this benchmark. Historically, Naturgy Energy Group's own Graham Number has ranged from 1.56 to 12.24 over the past decade. While the company's 10-year median is 2.08 vs. the industry median of 1.12, Naturgy Energy 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 Graham Number for an Utilities - Regulated company?
The median Graham Number among Utilities - Regulated companies is 1.12, based on 417 companies in the industry. Companies in the top quartile (top 25%) have a Graham Number significantly above this median, while those in the bottom quartile fall well below. However, Graham Number should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Naturgy Energy Group's current Graham Number of $16.18 is 1344.6% 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 Graham Number mean?
A high Graham Number can signal that a stock is expensive relative to its fundamentals. The Graham Number values a company based on its per-share earnings and book value. View historical data on Naturgy Energy Group and its competitors. For the Utilities - Regulated industry, the median Graham Number is 1.12 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Naturgy Energy Group's current Graham Number is $16.18, which is 678% above median its own 10-year median of 2.08. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Naturgy Energy Group stock overvalued right now?
Based on GuruFocus' analysis, Naturgy Energy Group (GASNF) is currently considered Modestly Overvalued. The stock's GF Value™ is $25.48, compared to a current price of $31.90 — trading 25.2% above its estimated fair value. The current Graham Number is $16.18, which is 678% above median its 10-year median of 2.08 and 1344.6% above the Utilities - Regulated industry median of 1.12. Naturgy Energy Group's overall GF Score™ is 69/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Graham Number calculated?
Graham Number is calculated from a company's financial statements. For Naturgy Energy Group (GASNF), the current Graham Number is $16.18 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 Naturgy Energy Group (GASNF) Overvalued in 2026?
Based on GuruFocus' analysis, Naturgy Energy Group stock appears to be overvalued.
The current stock price of $31.90 is trading 25.2% above its estimated GF Value™ of $25.48.
GuruFocus considers Naturgy Energy Group to be Modestly Overvalued.
Key valuation signals for GASNF:
Graham Number: $16.18 (678% above median its 10-year median of 2.08)
GF Value™: $25.48 vs. price of $31.90 (25.2% above fair value)
Industry Position: 1344.6% above the Utilities - Regulated median (#356 of 417)
No single metric tells the full story. See the GASNF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Naturgy stems from the 2008 acquisition of Union Fenosa. The company operates across the gas value chain, from procurement to distribution and marketing. It owns and operates the largest gas distribution network in Spain, where it is also the leading retail gas supplier. The company additionally operates gas and electricity distribution networks across several Latin American countries. It owns 17.9 GW of generation capacity, including 7.3 GW of wind and solar.
69GF Score
Get the complete analysis for GASNF
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