Atmos Energy Corporation (ATO) P/E Ratio History
Fairly ValuedTrading at 20.9x, near 5Y avg of 19.9x · 70th percentile · In line with own history · Data 1994–2026
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P/E Ratio Analysis
As of September 24, 2026, Atmos Energy Corporation (ATO) trades at a price-to-earnings ratio of 20.9x, with a stock price of $156.24 and trailing twelve-month earnings per share of $8.28.
The current P/E is roughly in line with its 5-year average of 19.9x. Over the past five years, ATO's P/E has ranged from a low of 17.1x to a high of 22.8x, placing the current valuation at the 70th percentile of its historical range.
Compared to the Utilities sector median P/E of 17.7x, ATO trades at a 18% premium to its sector peers. The sector includes 111 companies with P/E ratios ranging from 0.0x to 186.5x.
The PEG ratio of 2.38 (P/E divided by 9% EPS growth) suggests the stock may be expensive relative to its earnings growth. Peter Lynch popularized the rule that a PEG below 1.0 indicates an attractive entry point.
Relative to the broader market, ATO trades roughly in line with the S&P 500 median P/E of 25.3x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our ATO DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
ATO Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
ATO P/E vs Peers
Regulated Gas Distribution Utilities peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $5B | 17.7 | 0.71Best | +4% | |
| $5B | 15.7 | 1.10 | +14% | |
| $6B | 13.5 | 1.70 | +120% | |
| $2B | 17.1 | 4.72 | +36% | |
| $3B | 21.7 | 3.09 | +13% | |
| $52B | 28.7 | - | -38% | |
| $19B | 20.1 | - | +20% | |
| $8B | 11.9Lowest | 2.90 | +147%Best | |
| $20B | 17.9 | 2.99 | +6% |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
ATO Historical P/E Data (1994–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q3 | - | $172.27 | $8.40 | 20.5x | +15% |
| FY2026 Q2 | - | $184.72 | $8.13 | 22.7x | +27% |
| FY2026 Q1 | Dec 31 2025 | $167.63 | $7.69 | 21.8x | +22% |
| FY2025 Q4 | - | $170.75 | $7.48 | 22.8x | +28% |
| FY2025 Q3 | Jun 30 2025 | $154.11 | $7.30 | 21.1x | +18% |
| FY2025 Q2 | Mar 31 2025 | $154.58 | $7.22 | 21.4x | +20% |
| FY2025 Q1 | - | $139.27 | $7.04 | 19.8x | +11% |
| FY2024 Q4 | Sep 30 2024 | $138.71 | $6.89 | 20.1x | +12% |
| FY2024 Q3 | Jun 30 2024 | $116.65 | $6.81 | 17.1x | -4% |
| FY2024 Q2 | Mar 31 2024 | $118.87 | $6.67 | 17.8x | -0% |
| FY2024 Q1 | Dec 31 2023 | $115.90 | $6.30 | 18.4x | +3% |
| FY2023 Q4 | Sep 30 2023 | $105.93 | $6.13 | 17.3x | -3% |
| FY2023 Q3 | Jun 30 2023 | $116.34 | $5.84 | 19.9x | +11% |
| FY2023 Q2 | Mar 31 2023 | $112.36 | $5.82 | 19.3x | +8% |
| FY2023 Q1 | Dec 31 2022 | $112.07 | $5.71 | 19.6x | +10% |
| FY2022 Q4 | Sep 30 2022 | $101.85 | $5.66 | 18.0x | +1% |
| FY2022 Q3 | - | $112.10 | $5.51 | 20.3x | +14% |
| FY2022 Q2 | - | $119.49 | $5.37 | 22.3x | +24% |
| FY2022 Q1 | Dec 31 2021 | $104.77 | $5.30 | 19.8x | +10% |
| FY2021 Q4 | - | $88.20 | $5.15 | 17.1x | -4% |
| FY2021 Q3 | Jun 30 2021 | $96.11 | $5.32 | 18.1x | +1% |
| FY2021 Q2 | Mar 31 2021 | $98.85 | $5.50 | 18.0x | +0% |
| FY2021 Q1 | - | $95.43 | $5.15 | 18.5x | +4% |
| FY2020 Q4 | Sep 30 2020 | $95.59 | $4.91 | 19.5x | +9% |
| FY2020 Q3 | - | $99.58 | $4.87 | 20.4x | +14% |
| FY2020 Q2 | - | $99.23 | $4.59 | 21.6x | +21% |
| FY2020 Q1 | - | $111.86 | $4.46 | 25.1x | +40% |
| FY2019 Q4 | Sep 30 2019 | $113.89 | $4.37 | 26.1x | +46% |
| FY2019 Q3 | Jun 30 2019 | $105.56 | $4.23 | 25.0x | +39% |
| FY2019 Q2 | Mar 31 2019 | $102.93 | $4.19 | 24.6x | +37% |
| FY2019 Q1 | Dec 31 2018 | $92.72 | $3.97 | 23.4x | +30% |
| FY2018 Q4 | Sep 30 2018 | $93.91 | $5.48 | 17.1x | -4% |
| FY2018 Q3 | Jun 30 2018 | $90.14 | $5.47 | 16.5x | -8% |
| FY2018 Q2 | Mar 31 2018 | $84.24 | $5.50 | 15.3x | -14% |
| FY2018 Q1 | Dec 31 2017 | $85.89 | $5.45 | 15.8x | -12% |
| FY2017 Q4 | Sep 30 2017 | $83.84 | $3.75 | 22.4x | +25% |
| FY2017 Q3 | Jun 30 2017 | $82.95 | $3.74 | 22.2x | +24% |
| FY2017 Q2 | Mar 31 2017 | $78.99 | $3.76 | 21.0x | +17% |
| FY2017 Q1 | Dec 31 2016 | $74.15 | $3.59 | 20.7x | +15% |
| FY2016 Q4 | Sep 30 2016 | $74.47 | $3.40 | 21.9x | +22% |
| FY2016 Q3 | - | $81.32 | $3.30 | 24.6x | +38% |
| FY2016 Q2 | - | $74.26 | $3.16 | 23.5x | +31% |
| FY2016 Q1 | - | $63.04 | $3.13 | 20.1x | +13% |
| FY2015 Q4 | Sep 30 2015 | $58.18 | $3.09 | 18.8x | +5% |
| FY2015 Q3 | - | $51.28 | $3.09 | 16.6x | -7% |
| FY2015 Q2 | - | $55.30 | $2.99 | 18.5x | +3% |
| FY2015 Q1 | Dec 31 2014 | $55.74 | $3.02 | 18.5x | +3% |
| FY2014 Q4 | - | $47.70 | $3.01 | 15.8x | -11% |
| FY2014 Q3 | Jun 30 2014 | $53.40 | $2.86 | 18.7x | +4% |
| FY2014 Q2 | Mar 31 2014 | $47.13 | $2.83 | 16.7x | -7% |
| FY2014 Q1 | - | $45.42 | $2.72 | 16.7x | -7% |
| FY2013 Q4 | Sep 30 2013 | $42.59 | $2.65 | 16.1x | -10% |
| FY2013 Q3 | Jun 30 2013 | $41.06 | $2.66 | 15.5x | -14% |
| FY2013 Q2 | Mar 31 2013 | $42.69 | $2.58 | 16.6x | -7% |
| FY2013 Q1 | Dec 31 2012 | $35.12 | $2.51 | 14.0x | -22% |
| FY2012 Q4 | Sep 30 2012 | $35.79 | $2.38 | 15.1x | -16% |
| FY2012 Q3 | Jun 30 2012 | $35.07 | $2.31 | 15.2x | -15% |
| FY2012 Q2 | Mar 31 2012 | $31.46 | $1.97 | 16.0x | -11% |
| FY2012 Q1 | Dec 31 2011 | $33.35 | $2.22 | 15.1x | -16% |
| FY2011 Q4 | Sep 30 2011 | $32.45 | $2.28 | 14.3x | -20% |
| FY2011 Q3 | - | $33.25 | $2.27 | 14.6x | -18% |
| FY2011 Q2 | - | $34.10 | $2.24 | 15.2x | -15% |
| FY2011 Q1 | Dec 31 2010 | $31.20 | $2.01 | 15.5x | -13% |
| FY2010 Q4 | - | $29.25 | $2.20 | 13.3x | -26% |
| FY2010 Q3 | Jun 30 2010 | $27.04 | $2.02 | 13.4x | -25% |
| FY2010 Q2 | Mar 31 2010 | $28.57 | $2.07 | 13.8x | -23% |
| FY2010 Q1 | - | $29.40 | $2.25 | 13.1x | -27% |
| FY2009 Q4 | Sep 30 2009 | $28.18 | $2.08 | 13.5x | -24% |
| FY2009 Q3 | - | $25.04 | $2.27 | 11.0x | -38% |
| FY2009 Q2 | - | $23.12 | $2.17 | 10.6x | -41% |
| FY2009 Q1 | Dec 31 2008 | $23.70 | $2.01 | 11.8x | -34% |
| FY2008 Q4 | - | $26.62 | $2.00 | 13.3x | -26% |
| FY2008 Q3 | Jun 30 2008 | $27.57 | $1.92 | 14.4x | -20% |
| FY2008 Q2 | Mar 31 2008 | $25.50 | $1.84 | 13.8x | -23% |
| FY2008 Q1 | Dec 31 2007 | $28.04 | $1.80 | 15.5x | -13% |
| FY2007 Q4 | Sep 30 2007 | $28.32 | $1.95 | 14.5x | -19% |
| FY2007 Q3 | Jun 30 2007 | $30.06 | $2.09 | 14.4x | -20% |
| FY2007 Q2 | Mar 31 2007 | $31.28 | $2.02 | 15.5x | -14% |
| FY2007 Q1 | Dec 31 2006 | $31.91 | $1.92 | 16.6x | -7% |
| FY2006 Q4 | Sep 30 2006 | $28.55 | $1.83 | 15.6x | -13% |
| FY2006 Q3 | Jun 30 2006 | $27.91 | $1.55 | 18.0x | +1% |
| FY2006 Q2 | Mar 31 2006 | $26.33 | $1.83 | 14.4x | -20% |
| FY2006 Q1 | Dec 31 2005 | $26.16 | $1.84 | 14.2x | -21% |
| FY2005 Q4 | Sep 30 2005 | $28.25 | $1.75 | 16.1x | -10% |
| FY2005 Q3 | - | $28.80 | $1.88 | 15.4x | -14% |
| FY2005 Q2 | - | $27.00 | $1.91 | 14.2x | -21% |
| FY2005 Q1 | Dec 31 2004 | $27.35 | $1.92 | 14.3x | -20% |
| FY2004 Q4 | - | $25.19 | $1.70 | 14.9x | -17% |
| FY2004 Q3 | Jun 30 2004 | $25.60 | $1.73 | 14.8x | -17% |
| FY2004 Q2 | Mar 31 2004 | $25.57 | $1.64 | 15.6x | -13% |
| FY2004 Q1 | Dec 31 2003 | $24.30 | $1.59 | 15.3x | -15% |
| FY2003 Q4 | - | $23.94 | $1.62 | 14.8x | -17% |
| FY2003 Q3 | Jun 30 2003 | $24.80 | $1.54 | 16.2x | -10% |
| FY2003 Q2 | Mar 31 2003 | $21.26 | $1.62 | 13.1x | -27% |
| FY2003 Q1 | - | $23.32 | $1.56 | 14.9x | -16% |
| FY2002 Q4 | Sep 30 2002 | $21.50 | $1.46 | 14.7x | -18% |
| FY2002 Q3 | Jun 30 2002 | $23.44 | $1.41 | 16.6x | -7% |
| FY2002 Q2 | Mar 31 2002 | $23.60 | $1.25 | 18.9x | +6% |
| FY2002 Q1 | Dec 31 2001 | $21.25 | $1.37 | 15.6x | -13% |
| FY2001 Q4 | Sep 30 2001 | $21.60 | $1.57 | 13.8x | -23% |
| FY2001 Q3 | Jun 30 2001 | $24.46 | $1.64 | 15.0x | -16% |
| FY2001 Q2 | Mar 31 2001 | $23.80 | $1.58 | 15.1x | -16% |
| FY2001 Q1 | Dec 31 2000 | $24.38 | $1.39 | 17.5x | -2% |
| FY2000 Q4 | Sep 30 2000 | $20.63 | $1.15 | 17.9x | +0% |
| FY2000 Q3 | Jun 30 2000 | $17.50 | $0.58 | 30.2x | +69% |
| FY2000 Q2 | Mar 31 2000 | $16.38 | $0.55 | 29.8x | +66% |
| FY2000 Q1 | Dec 31 1999 | $20.44 | $0.55 | 37.2x | +108% |
| FY1999 Q4 | - | $24.13 | $0.59 | 40.9x | +128% |
| FY1999 Q3 | Jun 30 1999 | $25.00 | $1.14 | 21.9x | +23% |
| FY1999 Q2 | Mar 31 1999 | $24.06 | $1.37 | 17.6x | -2% |
| FY1999 Q1 | - | $32.25 | $1.68 | 19.2x | +7% |
| FY1998 Q4 | Sep 30 1998 | $28.56 | $1.86 | 15.4x | -14% |
| FY1998 Q3 | - | $30.50 | $1.99 | 15.4x | -14% |
| FY1998 Q2 | - | $29.63 | $1.83 | 16.2x | -9% |
| FY1998 Q1 | Dec 31 1997 | $30.25 | $1.62 | 18.7x | +5% |
| FY1997 Q4 | - | $24.88 | $1.56 | 16.0x | -11% |
| FY1997 Q3 | Jun 30 1997 | $24.00 | $1.31 | 18.3x | +2% |
| FY1997 Q2 | Mar 31 1997 | $25.38 | $1.43 | 17.7x | -1% |
| FY1997 Q1 | - | $23.88 | $1.54 | 15.5x | -13% |
| FY1996 Q4 | Sep 30 1996 | $23.38 | $1.51 | 15.5x | -14% |
| FY1996 Q3 | Jun 30 1996 | $30.63 | $1.66 | 18.5x | +3% |
| FY1996 Q2 | Mar 31 1996 | $23.00 | $1.65 | 13.9x | -22% |
| FY1996 Q1 | Dec 31 1995 | $23.00 | $1.41 | 16.3x | -9% |
| FY1995 Q4 | Sep 30 1995 | $19.38 | $1.24 | 15.6x | -13% |
| FY1995 Q3 | Jun 30 1995 | $20.25 | $1.06 | 19.1x | +7% |
| FY1995 Q2 | Mar 31 1995 | $18.50 | $0.97 | 19.1x | +7% |
| FY1995 Q1 | Dec 31 1994 | $17.00 | $0.93 | 18.3x | +2% |
| FY1994 Q4 | Sep 30 1994 | $17.75 | $0.98 | 18.1x | +1% |
Average P/E for displayed period: 17.9x
ATO Chart Terminal
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Historical Returns
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Peer Comparison
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ATO — Frequently Asked Questions
Quick answers to the most common questions about buying ATO stock.
What is ATO's P/E ratio?
Atmos Energy Corporation (ATO) trailing twelve-month P/E ratio is 20.9x, based on TTM diluted EPS of $8.28. The 5-year average P/E is 19.9x and the historical range spans 17.1x to 22.8x.
Is ATO stock overvalued or undervalued?
ATO trades at 20.9x P/E, near its 5-year average of 19.9x. The 70th percentile ranking within the 17.1x–22.8x historical range places valuation within normal bounds.
Is ATO stock expensive?
ATO is fairly valued relative to its own history. The current P/E of 20.9x is near the 5-year average of 19.9x (70th percentile of historical range).
What is ATO's historical P/E range?
Over the past 5 years, ATO's P/E ratio has ranged from 17.1x to 22.8x, with a median of 19.9x and an average of 19.9x. The current P/E of 20.9x places the stock at the 70th percentile of this range. Full historical data spans 1994–2026.
How does ATO's P/E compare to the S&P 500?
ATO trades at 20.9x P/E versus the S&P 500 median of 25.3x. The 17% discount to the market suggests lower growth expectations or perceived higher risk.
How does ATO's valuation compare to Utilities peers?
Atmos Energy Corporation P/E of 20.9x compares to the Utilities sector median of 17.7x. The premium reflects expected growth above peers or stronger fundamentals. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is ATO's PEG ratio?
ATO PEG ratio is 2.38, based on a P/E of 20.9x and EPS growth of 9.2%. A PEG above 2.0 indicates a premium valuation relative to earnings growth — typically considered expensive.
What is ATO's earnings yield?
ATO earnings yield is 4.77%, the inverse of its 20.9x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.