Atmos Energy (MIL:1ATO) Cyclically Adjusted Book per Share: €58.79 (As of Mar. 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

MIL:1ATO Atmos Energy Corp MIL:1ATO
57 GF Score
Price €146.80
GF Value €127.56
Valuation Modestly Overvalued
! 8 Warning Signs
View Full Analysis

What is Atmos Energy Cyclically Adjusted Book per Share?

Atmos Energy MIL:1ATO 57 Cyclically Adjusted Book per Share is €58.79 as of Mar. 2026. GuruFocus rates MIL:1ATO with a GF Score™ of 57/100 and a GF Value™ of €127.56 (Modestly Overvalued). The stock has 8 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.

Atmos Energy's adjusted book value per share for the three months ended in Mar. 2026 was €77.259. 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 €58.79 for the trailing ten years ended in Mar. 2026.

During the past 12 months, Atmos Energy's average Cyclically Adjusted Book Growth Rate was 10.00% per year. During the past 3 years, the average Cyclically Adjusted Book Growth Rate was 10.00% per year. During the past 5 years, the average Cyclically Adjusted Book Growth Rate was 11.80% per year. During the past 10 years, the average Cyclically Adjusted Book Growth Rate was 9.70% 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 Atmos Energy was 13.20% per year. The lowest was 2.10% per year. And the median was 5.90% per year.

As of today (2026-07-15), Atmos Energy's current stock price is €146.80. Atmos Energy's Cyclically Adjusted Book per Share for the quarter that ended in Mar. 2026 was €58.79. Atmos Energy's Cyclically Adjusted PB Ratio of today is 2.50.

During the past 13 years, the highest Cyclically Adjusted PB Ratio of Atmos Energy was 3.39. The lowest was 1.94. And the median was 2.56.


Atmos Energy  (MIL:1ATO) 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.

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

Cyclically Adjusted PB Ratio=Share Price/Cyclically Adjusted Book per Share
=146.80/58.79
=2.50

* 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 Atmos Energy was 3.39. The lowest was 1.94. And the median was 2.56.


Be Aware

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


Atmos Energy Cyclically Adjusted Book per Share Related Terms


Atmos Energy Cyclically Adjusted Book per Share Historical Data

* Premium members only.

The historical data trend for Atmos Energy'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.

Atmos Energy Cyclically Adjusted Book per Share Chart

Atmos Energy Annual Data
Trend Sep16 Sep17 Sep18 Sep19 Sep20 Sep21 Sep22 Sep23 Sep24 Sep25
Cyclically Adjusted Book per Share
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 51.71

Atmos Energy Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
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 0.00 0.00 51.71 56.35 58.79

MIL:1ATO vs NI, UGI, SWX: Cyclically Adjusted Book per Share Comparison

For the Utilities - Regulated Gas subindustry, Atmos Energy'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.


Atmos Energy Cyclically Adjusted PB Ratio vs Utilities - Regulated Industry

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

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


MIL:1ATO
57GF Score
Atmos Energy Corp MIL:1ATO
Cyclically Adjusted Book per Share is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Atmos Energy 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, Atmos Energy's adjusted Book Value per Share data for the three months ended in Mar. 2026 was:

Adj_Book= Book Value per Share /CPI of Mar. 2026 (Change)*Current CPI (Mar. 2026)
=77.259/330.2130*330.2130
=77.259

Current CPI (Mar. 2026) = 330.2130.

Atmos Energy Quarterly Data

Book Value per Share CPI Adj_Book
201606 29.717 241.018 40.715
201609 29.689 241.428 40.607
201612 33.362 241.432 45.630
201703 34.059 243.801 46.131
201706 32.741 244.955 44.137
201709 30.828 246.819 41.244
201712 34.753 246.524 46.551
201803 34.477 249.554 45.620
201806 36.640 251.989 48.014
201809 36.737 252.439 48.055
201812 40.217 251.233 52.860
201903 41.670 254.202 54.130
201906 42.245 256.143 54.461
201909 43.751 256.759 56.267
201912 45.108 256.974 57.964
202003 46.648 258.115 59.678
202006 46.516 257.797 59.582
202009 45.803 260.280 58.110
202012 46.267 260.474 58.654
202103 50.277 264.877 62.679
202106 49.334 271.696 59.959
202109 50.754 274.310 61.097
202112 54.172 278.802 64.161
202203 58.677 287.504 67.394
202206 62.676 296.311 69.847
202209 67.519 296.808 75.118
202212 64.862 296.797 72.165
202303 65.970 301.836 72.172
202306 66.434 305.109 71.900
202309 68.591 307.789 73.588
202312 68.536 306.746 73.779
202403 70.848 312.332 74.904
202406 72.912 314.175 76.634
202409 70.553 315.301 73.890
202412 76.896 315.605 80.455
202503 76.511 319.799 79.003
202506 72.299 322.561 74.014
202509 71.500 324.800 72.692
202512 73.731 324.054 75.132
202603 77.259 330.213 77.259

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 €58.79 mean?
Atmos Energy (MIL:1ATO) has a Cyclically Adjusted Book per Share of €58.79 as of Mar. 2026. 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 Atmos Energy and its competitors.
Is Atmos Energy's Cyclically Adjusted Book per Share too high?
Atmos Energy's current Cyclically Adjusted Book per Share is €58.79. Overall, Atmos Energy has a GF Score™ of 57/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Atmos Energy's Cyclically Adjusted Book per Share compare to NI and UGI?
Atmos Energy's Cyclically Adjusted Book per Share of €58.79 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 Atmos Energy and its competitors. Atmos Energy's current Cyclically Adjusted Book per Share is €58.79. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Atmos Energy stock overvalued right now?
Based on GuruFocus' analysis, Atmos Energy (MIL:1ATO) is currently considered Modestly Overvalued. The stock's GF Value™ is €127.56, compared to a current price of €146.80 — trading 15.1% above its estimated fair value. The current Cyclically Adjusted Book per Share is €58.79. Atmos Energy's overall GF Score™ is 57/100 with 8 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 Atmos Energy (MIL:1ATO), the current Cyclically Adjusted Book per Share is €58.79 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 Atmos Energy (MIL:1ATO) Overvalued in 2026?

Based on GuruFocus' analysis, Atmos Energy stock appears to be overvalued. The current stock price of €146.80 is trading 15.1% above its estimated GF Value™ of €127.56. GuruFocus considers Atmos Energy to be Modestly Overvalued.

Key valuation signals for MIL:1ATO:

  • Cyclically Adjusted Book per Share: €58.79
  • GF Value™: €127.56 vs. price of €146.80 (15.1% above fair value)
  • GF Score™: 57/100 with 8 warning signs

No single metric tells the full story. See the MIL:1ATO stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


Atmos Energy Business Description

Address 5430 LBJ Freeway, Suite 1800, Three Lincoln Centre, Dallas, TX, USA, 75240
Atmos Energy is the largest publicly traded, fully regulated, pure-play natural gas utility in the United States, serving more than 3.3 million customers in Texas, Colorado, Kansas, Kentucky, Louisiana, Mississippi, Tennessee, and Virginia. About two thirds of its earnings come from Texas, where it distributes natural gas in northern Texas and owns an intrastate gas pipeline spanning several key shale gas formations and interconnected with five storage facilities.
57GF Score

Get the complete analysis for MIL:1ATO

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

€146.80
Price
€127.56
GF Value