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
0.254%
12M weight contribution
-0.081 pp
3M weight contribution
+0.105 pp
12M price return
+21.9%
Share of matched S&P 500 members
Monthly observations through Apr 2021
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 2021 | $70.0bn | 0.254% | -0.081 pp | +21.9% | Yes |
| Mar 2021 | $65.7bn | 0.128% | +0.128 pp | +20.0% | No |
| Feb 2021 | $59.9bn | 0.120% | +0.120 pp | -1.8% | No |
| Jan 2021 | $62.2bn | 0.149% | -0.215 pp | -12.7% | No |
| Dec 2020 | $64.9bn | 0.263% | -0.065 pp | +0.6% | Yes |
| Nov 2020 | $63.2bn | 0.268% | -0.059 pp | +0.7% | Yes |
| Oct 2020 | $60.7bn | 0.287% | -0.055 pp | -4.3% | Yes |
| Sep 2020 | $57.3bn | 0.000% | -0.343 pp | -8.4% | No |
| Aug 2020 | $55.1bn | 0.000% | -0.331 pp | -6.6% | No |
| Jul 2020 | $57.7bn | 0.000% | -0.312 pp | +1.3% | No |
| Jun 2020 | $54.8bn | 0.000% | -0.310 pp | -2.2% | No |
| May 2020 | $60.3bn | 0.000% | -0.324 pp | +11.2% | No |
| Apr 2020 | $59.9bn | 0.335% | +0.028 pp | +11.1% | Yes |
| Mar 2020 | $57.1bn | 0.000% | -0.307 pp | +9.2% | No |
| Feb 2020 | $63.6bn | 0.000% | -0.298 pp | +26.6% | No |
| Jan 2020 | $73.8bn | 0.364% | +0.199 pp | +51.5% | Yes |
| Dec 2019 | $66.8bn | 0.328% | +0.166 pp | +51.7% | No |
| Nov 2019 | $65.0bn | 0.328% | +0.166 pp | +36.9% | No |
| Oct 2019 | $65.7bn | 0.343% | +0.188 pp | +45.9% | Yes |
| Sep 2019 | $64.6bn | 0.343% | +0.202 pp | +48.6% | Yes |
| Aug 2019 | $60.9bn | 0.331% | +0.188 pp | +39.5% | Yes |
| Jul 2019 | $58.7bn | 0.313% | +0.026 pp | +21.5% | Yes |
| Jun 2019 | $57.5bn | 0.310% | +0.026 pp | +25.4% | Yes |
| May 2019 | $55.7bn | 0.324% | +0.049 pp | +25.2% | 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.