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
1.05%
Industry change · 12M
-0.66 pp
Electric Utilities · contribution
-0.661 pp
Company participation
8%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $57.9bn | 0.187% | -0.141 pp | -0.127 pp | +7.2% | No |
| Southern Company → SO | United States | $44.4bn | 0.143% | -0.132 pp | -0.115 pp | +1.0% | No |
| American Electric Power → AEP | United States | $35.4bn | 0.114% | -0.089 pp | -0.079 pp | +7.2% | No |
| Public Service Enterprise Group → PEG | United States | $26.5bn | 0.085% | -0.077 pp | -0.064 pp | +2.8% | No |
| PPL Corporation → PPL | United States | $20.8bn | 0.067% | -0.049 pp | -0.058 pp | -3.7% | No |
| Exelon → EXC | United States | $30.1bn | 0.097% | -0.076 pp | -0.053 pp | +16.5% | No |
| Eversource Energy → ES | United States | $19.8bn | 0.064% | -0.046 pp | -0.050 pp | +0.7% | No |
| Edison International → EIX | United States | $21.4bn | 0.069% | -0.054 pp | -0.047 pp | +7.2% | No |
| WEC Energy Group → WEC | United States | $21.3bn | 0.069% | -0.052 pp | -0.047 pp | +7.9% | No |
| Evergy → EVRG | United States | $12.4bn | 0.040% | +0.040 pp | +0.040 pp | +13.0% | Yes |
| FirstEnergy → FE | United States | $18.2bn | 0.059% | -0.041 pp | -0.025 pp | +17.3% | No |
| Alliant Energy → LNT | United States | $10.0bn | 0.032% | -0.026 pp | -0.020 pp | +9.5% | No |
| Entergy → ETR | United States | $7.6bn | 0.024% | -0.020 pp | -0.016 pp | +9.9% | 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.