Naturgy Energy Group (WBO:GAS) Cyclically Adjusted Book per Share: €12.00 (As of Dec. 2025)


WBO:GAS Naturgy Energy Group SA WBO:GAS
66 GF Score
Price €27.40
GF Value €22.43
Valuation Modestly Overvalued
! 7 Warning Signs
View Full Analysis

What is Naturgy Energy Group Cyclically Adjusted Book per Share?

Naturgy Energy Group WBO:GAS -1.44% 66 Cyclically Adjusted Book per Share is €12.00 as of Dec. 2025. GuruFocus rates WBO:GAS with a GF Score™ of 66/100 and a GF Value™ of €22.43 (Modestly Overvalued). The stock has 7 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

Naturgy Energy Group's adjusted book value per share data for the fiscal year that ended in Dec. 2025 was €10.084. Add all the adjusted book value per share for the past 10 years together and divide the count will get our Cyclically Adjusted Book per Share, which is €12.00 for the trailing ten years ended in Dec. 2025.

During the past 12 months, Naturgy Energy Group's average Cyclically Adjusted Book Growth Rate was -3.70% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was -2.80% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was -1.70% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was -1.10% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the Cyclically Adjusted Book Growth Rate using Cyclically Adjusted Book per Share data.

During the past 13 years, the highest 3-Year average Cyclically Adjusted Book Growth Rate of Naturgy Energy Group was 1.40% per year. The lowest was -2.80% per year. And the median was -0.50% per year.

As of today (2026-07-01), Naturgy Energy Group's current stock price is € 27.40. Naturgy Energy Group's Cyclically Adjusted Book per Share for the fiscal year that ended in Dec. 2025 was €12.00. Naturgy Energy Group's Cyclically Adjusted PB Ratio of today is 2.28.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Naturgy Energy Group was 2.45. The lowest was 1.10. And the median was 1.72.


Naturgy Energy Group  (WBO:GAS) Cyclically Adjusted Book per Share Explanation

If a company grows much fast than inflation, Cyclically Adjusted Book per Share may underestimate the company's equity. Cyclically Adjusted PB Ratio can seem to be too high even the actual PB Ratio is low.

For the Cyclically Adjusted PB Ratio, the book value of the past 10 years are inflation-adjusted and averaged. The result is used for P/B calculation. Since it looks at the average over the last 10 years, the Cyclically Adjusted PB Ratio is also called CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller. He uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings per share of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted book value per share of a company over the past 10 years.

Naturgy Energy Group's Cyclically Adjusted PB Ratio of today is calculated as

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=27.40/12.00
=2.28

* 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.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Naturgy Energy Group was 2.45. The lowest was 1.10. And the median was 1.72.


Be Aware

Cyclically Adjusted PB Ratio works better for cyclical companies. It gives you a better idea on the company's real book value.


Naturgy Energy Group Cyclically Adjusted Book per Share Related Terms


Naturgy Energy Group Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Naturgy Energy Group's Cyclically Adjusted Book per Share 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.

Naturgy Energy Group Cyclically Adjusted Book per Share Chart

Naturgy Energy Group Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 13.30 13.33 12.94 12.55 12.00

Naturgy Energy Group Semi-Annual Data
Jun16 Dec16 Jun17 Dec17 Jun18 Dec18 Jun19 Dec19 Jun20 Dec20 Jun21 Dec21 Jun22 Dec22 Jun23 Dec23 Jun24 Dec24 Jun25 Dec25
Cyclically Adjusted Book per Share Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 12.94 0.00 12.55 0.00 12.00

WBO:GAS vs ATO, NI, UGI: Cyclically Adjusted Book per Share Comparison

For the Utilities - Regulated Gas subindustry, Naturgy Energy Group's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB Ratio 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 Cyclically Adjusted PB Ratio vs Utilities - Regulated Industry

For the Utilities - Regulated industry and Utilities sector, Naturgy Energy Group's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Naturgy Energy Group's Cyclically Adjusted PB Ratio falls into.


WBO:GAS
66GF Score
Naturgy Energy Group SA WBO:GAS
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Naturgy Energy Group Cyclically Adjusted Book per Share Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted Book per Share and the Cyclically Adjusted PB Ratio. The Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years.

What is Cyclically Adjusted Book per Share? How do we calculate Cyclically Adjusted Book per Share?

Cyclically Adjusted Book per Share is the average of the inflation adjusted Book Value per Share of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the Cyclically Adjusted Book per Share of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the book value per share from 2001 through 2010.

We adjusted the 2001 book value per share data with the total inflation from 2001 through 2010 to the equivalent book value in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart's book value is $1 a share in 2001, then the 2001's equivalent book value in 2010 is $1.4 a share. If Wal-Mart's book value is $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 book value in 2010 is $1.35. So on and so forth, you get the equivalent book value per share of past 10 years. Then you add them together and divided the sum by the count to get Cyclically Adjusted Book per Share.

Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.

For example, Naturgy Energy Group's adjusted Book Value per Share data for the fiscal year that ended in Dec. 2025 was:

Adj_Book=Book Value per Share /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=10.084/128.4016*128.4016
=10.084

Current CPI (Dec. 2025) = 128.4016.

Naturgy Energy Group Annual Data

Book Value per Share CPI Adj_Book
201612 15.226 101.842 19.197
201712 14.724 102.975 18.360
201812 11.096 104.193 13.674
201912 10.874 105.015 13.296
202012 8.354 104.456 10.269
202112 6.129 111.298 7.071
202212 7.882 117.650 8.602
202312 9.834 121.300 10.410
202412 9.865 124.753 10.153
202512 10.084 128.402 10.084

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

What does a Cyclically Adjusted Book per Share of €12.00 mean?
Naturgy Energy Group (WBO:GAS) has a Cyclically Adjusted Book per Share of €12.00 as of Dec. 2025. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Naturgy Energy Group and its competitors.
Is Naturgy Energy Group's Cyclically Adjusted Book per Share too high?
Naturgy Energy Group's current Cyclically Adjusted Book per Share is €12.00. Overall, Naturgy Energy Group has a GF Score™ of 66/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Naturgy Energy Group's Cyclically Adjusted Book per Share compare to ATO and NI?
Naturgy Energy Group's Cyclically Adjusted Book per Share of €12.00 can be compared against companies in the Utilities - Regulated industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Cyclically Adjusted Book per Share for an Utilities - Regulated company?
A good Cyclically Adjusted Book per Share depends on the Utilities - Regulated industry context. However, Cyclically Adjusted Book per Share should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Cyclically Adjusted Book per Share mean?
A high Cyclically Adjusted Book per Share can signal that a stock is expensive relative to its fundamentals. Cyclically adjusted book value per share represents the company's inflation-adjusted book value per share over a 10-year period. View historical data on Naturgy Energy Group and its competitors. Naturgy Energy Group's current Cyclically Adjusted Book per Share is €12.00. 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 (WBO:GAS) is currently considered Modestly Overvalued. The stock's GF Value™ is €22.43, compared to a current price of €27.40 — trading 22.2% above its estimated fair value. The current Cyclically Adjusted Book per Share is €12.00. Naturgy Energy Group's overall GF Score™ is 66/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Cyclically Adjusted Book per Share calculated?
Cyclically Adjusted Book per Share is calculated from a company's financial statements. For Naturgy Energy Group (WBO:GAS), the current Cyclically Adjusted Book per Share is €12.00 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 (WBO:GAS) Overvalued in 2026?

Based on GuruFocus' analysis, Naturgy Energy Group stock appears to be overvalued. The current stock price of €27.40 is trading 22.2% above its estimated GF Value™ of €22.43. GuruFocus considers Naturgy Energy Group to be Modestly Overvalued.

Key valuation signals for WBO:GAS:

  • Cyclically Adjusted Book per Share: €12.00
  • GF Value™: €22.43 vs. price of €27.40 (22.2% above fair value)
  • GF Score™: 66/100 with 7 warning signs

No single metric tells the full story. See the WBO:GAS stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Naturgy Energy Group Business Description

Address Avenida de America 38, Madrid, ESP
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.
66GF Score

Get the complete analysis for WBO:GAS

Cyclically Adjusted Book per Share is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€27.40
Price
€22.43
GF Value