Observatory · observe first
Atmos Energy
ATO · United States · Gas Utilities · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.055%
12M weight contribution
+0.005 pp
3M weight contribution
+0.002 pp
12M price return
+25.9%
Share of matched S&P 500 members
Monthly observations through Sep 2025
Company price index
A separate dimension from market allocation
Historical observations
Most recent 24 observations at or before the selected month
| Month | Market cap | Universe weight | 12M weight change | 12M return | Above 6M weight average |
|---|---|---|---|---|---|
| Sep 2025 | $27.4bn | 0.055% | +0.005 pp | +25.9% | No |
| Aug 2025 | $26.7bn | 0.055% | +0.006 pp | +29.9% | No |
| Jul 2025 | $24.8bn | 0.052% | +0.018 pp | +24.8% | No |
| Jun 2025 | $24.5bn | 0.053% | +0.020 pp | +35.2% | No |
| May 2025 | $24.6bn | 0.056% | +0.022 pp | +36.6% | Yes |
| Apr 2025 | $25.5bn | 0.061% | +0.010 pp | +39.7% | Yes |
| Mar 2025 | $24.5bn | 0.058% | +0.009 pp | +33.3% | Yes |
| Feb 2025 | $24.1bn | 0.054% | +0.005 pp | +38.1% | Yes |
| Jan 2025 | $22.1bn | 0.049% | -0.001 pp | +28.4% | No |
| Dec 2024 | $21.6bn | 0.049% | -0.002 pp | +23.4% | Yes |
| Nov 2024 | $23.5bn | 0.052% | -0.001 pp | +36.5% | Yes |
| Oct 2024 | $21.5bn | 0.051% | -0.004 pp | +32.5% | Yes |
| Sep 2024 | $21.5bn | 0.050% | -0.002 pp | +34.6% | Yes |
| Aug 2024 | $20.3bn | 0.049% | -0.006 pp | +15.9% | Yes |
| Jul 2024 | $19.3bn | 0.035% | -0.004 pp | +8.0% | No |
| Jun 2024 | $17.6bn | 0.033% | -0.006 pp | +3.1% | No |
| May 2024 | $17.5bn | 0.033% | -0.008 pp | +3.4% | No |
| Apr 2024 | $17.8bn | 0.052% | -0.004 pp | +6.1% | Yes |
| Mar 2024 | $17.9bn | 0.050% | -0.005 pp | +8.7% | No |
| Feb 2024 | $17.0bn | 0.049% | -0.008 pp | +2.8% | No |
| Jan 2024 | $16.9bn | 0.050% | -0.006 pp | -0.5% | No |
| Dec 2023 | $17.2bn | 0.051% | -0.006 pp | +6.2% | Yes |
| Nov 2023 | $16.9bn | 0.053% | -0.005 pp | -2.8% | Yes |
| Oct 2023 | $16.0bn | 0.054% | +0.001 pp | +3.6% | Yes |
Its weight is estimated market cap divided by the total estimated market cap of matched S&P 500 members for the month. This is not an official float-adjusted S&P index weight.