SuperworthAtmos Energy market cap ATO
Share price times shares outstanding: what the whole company sells for, since 2010.
- Today, Oct 23, 2026
- $29.1B
- Highest close in our data
- $31.5B
- Apr 2026
Atmos Energy is worth $29.1B at the close on Oct 23, 2026, at $172.21 a share.
That is up 3% over the last year and up 142% over five years.
Its highest close in our data was $31.5B in Apr 2026.
Market cap over time
Year by year
| Year | End of year | Low | High | Change |
|---|---|---|---|---|
| 2026 so far | $29.1B | $26.6B | $31.5B | +7% |
| 2025 | $27.2B | $21.3B | $28.5B | +26% |
| 2024 | $21.7B | $16.8B | $23.5B | +26% |
| 2023 | $17.2B | $15.6B | $17.8B | +9% |
| 2022 | $15.8B | $13.7B | $16.9B | +14% |
| 2021 | $13.9B | $10.8B | $13.9B | +15% |
| 2020 | $12B | $10.5B | $14.7B | −9% |
| 2019 | $13.1B | $10.2B | $13.5B | +29% |
| 2018 | $10.2B | $8.5B | $11B | +12% |
| 2017 | $9.1B | $7.7B | $9.8B | +18% |
| 2016 | $7.7B | $6.3B | $8.2B | +20% |
| 2015 | $6.4B | $5.2B | $6.4B | +14% |
| 2014 | $5.6B | $4.1B | $5.6B | +37% |
| 2013 | $4.1B | $3.2B | $4.3B | +31% |
| 2012 | $3.1B | $2.8B | $3.3B | +4% |
| 2011 | $3B | $2.8B | $3.2B | +7% |
| 2010 | $2.8B | $2.6B | $2.9B | n/a |
Against its peers
Companies in Regulated Gas nearest Atmos Energy's size, closest first, today.
| Company | Market cap |
|---|---|
| ATOAtmos Energy | $29.1B |
| NINiSource | $20.8B |
| NFGNational Fuel Gas | $7.7B |
| NJRNew Jersey Resources | $5.4B |
| SRSpire | $5B |
| OGSONE Gas | $4.9B |
| MDUMDU Resources | $4B |
| Peer median | $5.2B |
What the market cap tells you
Share price times shares outstanding: what the whole company sells for today.
Size, not quality. Large caps move slower and are covered more. That is all it tells you.
More on Atmos Energy
Valuation data, not investment advice. Prices as of . Reported figures come from the company's filings with the SEC.