Question 1

What is Atmos Energy's P/E ratio?

Accepted Answer

Atmos Energy (ATO) P/E ratio is 21.2× as of June 5, 2026. The ratio is calculated by dividing market capitalisation by trailing twelve-month earnings (net income), using USD-normalised financials (IAS 21 exchange-rate translation for non-USD reporters).

Question 2

How is the P/E ratio calculated?

Accepted Answer

P/E = Share Price ÷ Trailing Twelve-Month (TTM) Diluted EPS, or equivalently Market Capitalisation ÷ TTM Net Income. All inputs are sourced from audited GAAP/IFRS filings and translated to USD using period-end exchange rates so the multiple is comparable across companies and currencies.

Question 3

What is the P/E ratio?

Accepted Answer

The price-to-earnings (P/E) ratio, also called the earnings multiple, measures how much investors pay per dollar of a company's trailing twelve-month (TTM) earnings. It is calculated as share price ÷ TTM diluted EPS (equivalent to market capitalisation ÷ TTM net income). A higher P/E implies the market is pricing in stronger future earnings growth or lower risk; a lower P/E can signal slower expected growth, higher risk, or potential undervaluation.

Question 4

What is a good P/E ratio for Atmos Energy?

Accepted Answer

There is no universal "good" P/E. As a rule of thumb, the S&P 500 has historically averaged a P/E in the mid-to-high teens; mature, slow-growth businesses commonly trade in the 10–18× range, while high-growth or asset-light companies often trade at 25–50×+. What matters is the comparison to sector peers and to the company's own historical range. For Atmos Energy specifically, the relevant sector benchmark is the current sector median of 21.4×.

Question 5

Is Atmos Energy's P/E ratio high or low?

Accepted Answer

Atmos Energy's P/E ratio of 21.2× is above its own 5-year average of 20.0× and below the sector median of 21.4×. That places the current reading at the 60th percentile of its 10-year history. A higher multiple usually reflects stronger expected growth, lower perceived risk, or higher returns on capital; a lower multiple reflects the opposite.

Question 6

What is Atmos Energy's historical P/E ratio range?

Accepted Answer

In the available daily series, Atmos Energy (ATO) P/E ratio has ranged from a low of 10.5× in 2009 to a high of 26.6× in 2019. The 5-year average is 20.0× and the 5-year median is 20.1×.

Question 7

What was Atmos Energy's P/E ratio in 2025?

Accepted Answer

Atmos Energy (ATO) P/E ratio at the end of 2025 was 22.6×. Annual values reflect the multiple on the last trading day of each calendar year, using the trailing twelve-month earnings figure available at that date.

Question 8

Why does Atmos Energy's P/E ratio change over time?

Accepted Answer

Valuation multiples move with two inputs: the numerator (market capitalisation, which tracks the share price) and the denominator (earnings). Share-price changes — driven by interest rates, earnings expectations, risk appetite, and broader market sentiment — typically dominate short-term moves, while changes in the underlying fundamental drive the longer-term trend. As a result, the ratio can rise during stock-price rallies even if the business itself has not become more valuable, and fall during sell-offs even when fundamentals are improving.


2025	$27.14B	$1.20B	22.6×	+2.3×	Sep 30, 2025
2024	$21.21B	$1.04B	20.3×	+2.6×	Sep 30, 2024
2023	$15.75B	$885.86M	17.8×	-0.8×	Sep 30, 2023
2022	$14.35B	$774.40M	18.5×	+0.8×	Sep 30, 2022
2021	$11.79B	$665.56M	17.7×	-2.0×	Sep 30, 2021
2020	$11.86B	$601.44M	19.7×	-6.9×	Sep 30, 2020
2019	$13.59B	$511.41M	26.6×	+9.4×	Sep 30, 2019
2018	$10.38B	$603.06M	17.2×	-5.4×	Sep 30, 2018
2017	$8.96B	$396.42M	22.6×	+0.3×	Sep 30, 2017
2016	$7.80B	$350.10M	22.3×	+3.4×	Sep 30, 2016
2015	$5.95B	$315.07M	18.9×	+2.2×	Sep 30, 2015
2014	$4.83B	$289.82M	16.7×	+0.8×	Sep 30, 2014
2013	$3.86B	$243.19M	15.9×	+1.2×	Sep 30, 2013
2012	$3.19B	$216.72M	14.7×	+0.6×	Sep 30, 2012
2011	$2.93B	$207.60M	14.1×	+1.3×	Sep 30, 2011
2010	$2.63B	$205.84M	12.8×	-0.8×	Sep 30, 2010
2009	$2.60B	$190.98M	13.6×	+0.2×	Sep 30, 2009
2008	$2.41B	$180.33M	13.4×	-1.9×	Sep 30, 2008
2007	$2.57B	$168.49M	15.3×	-0.7×	Sep 30, 2007
2006	$2.36B	$147.74M	16.0×	-0.7×	Sep 30, 2006
2005	$2.27B	$135.78M	16.7×	-5.3×	Sep 30, 2005
2004	$1.90B	$86.23M	22.0×	+4.8×	Sep 30, 2004
2003	$1.23B	$71.69M	17.2×	+1.8×	Sep 30, 2003
2002	$920.11M	$59.66M	15.4×	—	Sep 30, 2002


American States Water (AWR)	22.1×
Middlesex Water (MSEX)	21.8×
Evergy (EVRG)	21.4×
H2O America (HTO)	21.2×
CMS Energy (CMS)	21.1×
Essential Utilities (WTRG)	20.5×
Ameren (AEE)	19.9×
Duke Energy (DUK)	19.8×
MGE Energy (MGEE)	19.8×
American Electric Power Company (AEP)	19.4×
Consolidated Edison (ED)	19.1×
Pinnacle West Capital (PNW)	18.7×
Dominion Energy (D)	18.3×
Black Hills (BKH)	18.2×
Exelon (EXC)	18.1×
Public Service Enterprise Group (PEG)	17.8×
Northwest Natural Holding (NWN)	17.7×
New Jersey Resources (NJR)	16.2×
Avista (AVA)	16.0×
Eversource Energy (ES)	14.9×
Artesian Resources (ARTNA)	14.1×
PG&E (PCG)	13.1×
UGI (UGI)	12.2×
Edison International (EIX)	7.6×
AES (AES)	7.5×

P/E Ratio for Atmos Energy (ATO)

P/E Ratio daily chart for Atmos Energy (ATO)

Historical P/E Ratio for Atmos Energy (ATO) from 2002 to 2025

About P/E Ratio at Atmos Energy (ATO)

Atmos Energy P/E Ratio by Year

Atmos Energy P/E Ratio 2025: 22.6×

Atmos Energy P/E Ratio 2024: 20.3×

Atmos Energy P/E Ratio 2023: 17.8×

Atmos Energy P/E Ratio 2022: 18.5×

Atmos Energy P/E Ratio 2021: 17.7×

Sector peers by P/E Ratio — chart

Sector peers by P/E Ratio — table

Frequently asked questions

Atmos Energy (ATO) Key Financials

P/E Ratio daily chart for Atmos Energy (ATO)

Historical P/E Ratio for Atmos Energy (ATO) from 2002 to 2025

About P/E Ratio at Atmos Energy (ATO)

Atmos Energy P/E Ratio by Year

Atmos Energy P/E Ratio 2025: 22.6×

Atmos Energy P/E Ratio 2024: 20.3×

Atmos Energy P/E Ratio 2023: 17.8×

Atmos Energy P/E Ratio 2022: 18.5×

Atmos Energy P/E Ratio 2021: 17.7×

Sector peers by P/E Ratio — chart

Sector peers by P/E Ratio — table

Frequently asked questions

+What is Atmos Energy's P/E ratio?

+How is the P/E ratio calculated?

+What is the P/E ratio?

+What is a good P/E ratio for Atmos Energy?

+Is Atmos Energy's P/E ratio high or low?

+What is Atmos Energy's historical P/E ratio range?

+What was Atmos Energy's P/E ratio in 2025?

+Why does Atmos Energy's P/E ratio change over time?

Atmos Energy (ATO) Key Financials