Observatory · observe first
Southern Company
SO · United States · Electric Utilities · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.242%
12M weight contribution
+0.010 pp
3M weight contribution
+0.037 pp
12M price return
+29.4%
Share of matched S&P 500 members
Monthly observations through Apr 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 |
|---|---|---|---|---|---|
| Apr 2025 | $100.8bn | 0.242% | +0.010 pp | +29.4% | Yes |
| Mar 2025 | $100.9bn | 0.239% | +0.022 pp | +32.6% | Yes |
| Feb 2025 | $98.5bn | 0.220% | +0.010 pp | +38.1% | Yes |
| Jan 2025 | $92.0bn | 0.205% | -0.021 pp | +25.2% | No |
| Dec 2024 | $90.2bn | 0.205% | -0.024 pp | +21.7% | No |
| Nov 2024 | $97.7bn | 0.215% | -0.026 pp | +30.2% | Yes |
| Oct 2024 | $99.7bn | 0.234% | -0.015 pp | +40.5% | Yes |
| Sep 2024 | $98.7bn | 0.230% | -0.006 pp | +44.7% | Yes |
| Aug 2024 | $94.6bn | 0.228% | -0.007 pp | +32.5% | Yes |
| Jul 2024 | $91.3bn | 0.164% | -0.008 pp | +20.2% | No |
| Jun 2024 | $84.8bn | 0.159% | -0.018 pp | +14.9% | No |
| May 2024 | $87.6bn | 0.167% | -0.020 pp | +19.6% | No |
| Apr 2024 | $80.2bn | 0.232% | -0.039 pp | +4.0% | Yes |
| Mar 2024 | $78.3bn | 0.217% | -0.041 pp | +7.3% | No |
| Feb 2024 | $73.4bn | 0.210% | -0.031 pp | +11.0% | No |
| Jan 2024 | $75.8bn | 0.225% | -0.027 pp | +6.9% | No |
| Dec 2023 | $76.5bn | 0.228% | -0.052 pp | +2.2% | Yes |
| Nov 2023 | $77.4bn | 0.241% | -0.009 pp | +9.2% | Yes |
| Oct 2023 | $73.4bn | 0.250% | -0.003 pp | +7.0% | Yes |
| Sep 2023 | $70.6bn | 0.236% | -0.048 pp | -0.9% | Yes |
| Aug 2023 | $73.9bn | 0.235% | -0.058 pp | -8.5% | Yes |
| Jul 2023 | $78.9bn | 0.172% | -0.109 pp | -2.2% | No |
| Jun 2023 | $76.6bn | 0.177% | -0.118 pp | +2.4% | No |
| May 2023 | $76.1bn | 0.188% | -0.102 pp | -4.1% | No |
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.