Observatory · observe first
Atmos Energy
ATO · United States · Gas Utilities · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Latest available · not live
20182026
Universe weight
0.044%
12M weight contribution
-0.010 pp
3M weight contribution
-0.006 pp
12M price return
-6.3%
Share of matched S&P 500 members
Monthly observations through Sep 2026
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 2026 | $26.4bn | 0.044% | -0.010 pp | -6.3% | No |
| Aug 2026 | $28.1bn | 0.047% | -0.009 pp | +2.3% | No |
| Jul 2026 | $28.8bn | 0.050% | -0.002 pp | +13.3% | Yes |
| Jun 2026 | $28.8bn | 0.050% | -0.003 pp | +14.3% | Yes |
| May 2026 | $28.2bn | 0.049% | -0.007 pp | +11.8% | Yes |
| Apr 2026 | $31.4bn | 0.043% | -0.019 pp | +20.9% | No |
| Mar 2026 | $30.6bn | 0.045% | -0.014 pp | +22.2% | No |
| Feb 2026 | $30.9bn | 0.042% | -0.012 pp | +25.5% | No |
| Jan 2026 | $26.9bn | 0.051% | +0.002 pp | +19.3% | No |
| Dec 2025 | $27.1bn | 0.053% | +0.004 pp | +23.1% | No |
| Nov 2025 | $28.5bn | 0.056% | +0.004 pp | +19.2% | Yes |
| Oct 2025 | $27.6bn | 0.054% | +0.003 pp | +26.5% | No |
| 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 |
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.