Observatory · observe first
Follow the allocation change
Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.
Historical time machine
Historical observation
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Utilities
3 · Sub-industry
Inside Electric Utilities
Electric Utilities · weight
1.13%
Industry change · 12M
-0.59 pp
Electric Utilities · contribution
-0.586 pp
Company participation
8%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 2018 · sorted by absolute contribution to 12-month change
| Company | Country | Market cap | Universe weight | 3M contribution | 12M contribution | 12M price return | Above 6M weight average |
|---|---|---|---|---|---|---|---|
| Duke Energy → DUK | United States | $58.9bn | 0.200% | -0.134 pp | -0.114 pp | +9.0% | No |
| Southern Company → SO | United States | $45.7bn | 0.155% | -0.132 pp | -0.103 pp | +3.9% | No |
| American Electric Power → AEP | United States | $36.2bn | 0.123% | -0.082 pp | -0.070 pp | +9.7% | No |
| Public Service Enterprise Group → PEG | United States | $27.0bn | 0.092% | -0.060 pp | -0.058 pp | +5.8% | No |
| PPL Corporation → PPL | United States | $21.3bn | 0.072% | -0.045 pp | -0.053 pp | -0.3% | No |
| Exelon → EXC | United States | $30.2bn | 0.102% | -0.068 pp | -0.048 pp | +16.7% | No |
| Eversource Energy → ES | United States | $20.0bn | 0.068% | -0.044 pp | -0.046 pp | +2.9% | No |
| WEC Energy Group → WEC | United States | $21.6bn | 0.073% | -0.049 pp | -0.043 pp | +9.2% | No |
| Evergy → EVRG | United States | $12.2bn | 0.041% | +0.041 pp | +0.041 pp | +10.9% | Yes |
| Edison International → EIX | United States | $22.6bn | 0.077% | -0.050 pp | -0.040 pp | +14.2% | No |
| FirstEnergy → FE | United States | $19.1bn | 0.065% | -0.036 pp | -0.019 pp | +17.0% | No |
| Alliant Energy → LNT | United States | $10.0bn | 0.034% | -0.024 pp | -0.018 pp | +10.7% | No |
| Entergy → ETR | United States | $7.6bn | 0.026% | -0.017 pp | -0.015 pp | +10.4% | No |
Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.