Atmos Energy (ATO) Shares Outstanding (2009 - 2026)
Atmos Energy (ATO) reported Shares Outstanding of 168.35 million for fiscal Q3 2026 (quarter ended Jun 30, 2026), up 5.7% from 159.29 million a year earlier and up 1.1% from the prior quarter.
Powered by 
Analysis
Atmos Energy (ATO) Shares Outstanding (2009 - 2026) Analysis & Trends
For FY2025 (ended Sep 30, 2025), Atmos Energy posted Shares Outstanding of 158.94 million, up 4.2% from FY2024.
- Shares Outstanding has increased for 13 consecutive fiscal years, with a five-year compound annual growth rate of 5.3% (FY2020 to FY2025).
- By fiscal year, Shares Outstanding came in at 152.51 million in FY2024 (+5.1%), 145.12 million in FY2023 (+5.3%), 137.83 million in FY2022 (+6.2%) and 129.78 million in FY2021 (+5.7%).
- The fiscal Q3 2026 figure ranks as the highest quarterly Shares Outstanding in data going back to fiscal Q1 2010.
- Year over year, Shares Outstanding has now increased in each of the last 55 quarters, with growth averaging 4.6% over the last eight quarters.
- The year-over-year growth in Shares Outstanding has ranged between 3.9% (fiscal Q3 2025) and 6.5% (fiscal Q3 2022) over the last five years.
- Per Business Quant data, the three fiscal quarters before Q3 2026 came in at 166.46 million (Q2 2026), 162.73 million (Q1 2026) and 158.94 million (Q4 2025).
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | Shares Outstanding (Qtr) |
|---|---|---|---|---|---|
| 1 | Enel Chile | 292.57 Bn | 292.57 Bn | 890.00 Mn | 69.17 Bn |
| 2 | National Grid | 78.85 Bn | 60.37 Bn | - | 989.20 Mn |
| 3 | Dominion Energy | 53.27 Bn | 55.95 Bn | - | 879.50 Mn |
| 4 | Xcel Energy | 44.01 Bn | 38.91 Bn | - | 625.00 Mn |
| 5 | Wec Energy | 32.84 Bn | 33.08 Bn | 1.51 Bn | 325.80 Mn |
| 6 | Ameren | 27.51 Bn | 27.59 Bn | - | 276.80 Mn |
| 7 | Fortis | 26.81 Bn | 27.29 Bn | 1.60 Bn | 503.50 Mn |
| 8 | Atmos Energy | 26.44 Bn | 25.21 Bn | 870.85 Mn | 168.35 Mn |
| 9 | American Water Works Company | 25.73 Bn | 25.14 Bn | - | 196.00 Mn |
| 10 | Dte Energy | 25.35 Bn | 24.83 Bn | - | 208.00 Mn |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Jun 30, 2026 | 168.35 Mn |
| Mar 31, 2026 | 166.46 Mn |
| Dec 31, 2025 | 162.73 Mn |
| Sep 30, 2025 | 158.94 Mn |
| Jun 30, 2025 | 159.29 Mn |
| Mar 31, 2025 | 159.18 Mn |
| Dec 31, 2024 | 156.30 Mn |
| Sep 30, 2024 | 152.51 Mn |
| Jun 30, 2024 | 153.31 Mn |
| Mar 31, 2024 | 151.27 Mn |
| Dec 31, 2023 | 149.80 Mn |
| Sep 30, 2023 | 145.12 Mn |
| Jun 30, 2023 | 146.05 Mn |
| Mar 31, 2023 | 143.94 Mn |
| Dec 31, 2022 | 141.82 Mn |
| Sep 30, 2022 | 137.83 Mn |
| Jun 30, 2022 | 139.88 Mn |
| Mar 31, 2022 | 136.83 Mn |
| Dec 31, 2021 | 133.68 Mn |
| Sep 30, 2021 | 129.78 Mn |
API Access
Atmos Energy Shares Outstanding API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=shares-outstanding&ticker=ATO&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "shares-outstanding", "ticker": "ATO", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=shares-outstanding&ticker=ATO&period=max&api_key=YOUR_API_KEY");
const data = await res.json();