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
1.03%
Industry change · 12M
-0.68 pp
Electric Utilities · contribution
-0.682 pp
Company participation
8%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 | $57.0bn | 0.182% | -0.155 pp | -0.132 pp | +5.6% | No |
| Southern Company → SO | United States | $44.2bn | 0.141% | -0.143 pp | -0.117 pp | +0.6% | No |
| American Electric Power → AEP | United States | $34.9bn | 0.111% | -0.096 pp | -0.082 pp | +5.9% | No |
| Public Service Enterprise Group → PEG | United States | $26.7bn | 0.085% | -0.081 pp | -0.065 pp | +4.6% | No |
| PPL Corporation → PPL | United States | $20.5bn | 0.065% | -0.056 pp | -0.060 pp | -4.0% | No |
| Exelon → EXC | United States | $30.1bn | 0.096% | -0.082 pp | -0.055 pp | +16.3% | No |
| Eversource Energy → ES | United States | $19.5bn | 0.062% | -0.051 pp | -0.052 pp | -0.1% | No |
| WEC Energy Group → WEC | United States | $21.1bn | 0.067% | -0.057 pp | -0.049 pp | +6.6% | No |
| Edison International → EIX | United States | $22.1bn | 0.070% | -0.055 pp | -0.046 pp | +11.3% | No |
| Evergy → EVRG | United States | $12.0bn | 0.038% | +0.038 pp | +0.038 pp | +8.8% | Yes |
| FirstEnergy → FE | United States | $18.1bn | 0.058% | -0.046 pp | -0.026 pp | +16.7% | No |
| Alliant Energy → LNT | United States | $10.0bn | 0.032% | -0.028 pp | -0.021 pp | +8.8% | No |
| Entergy → ETR | United States | $7.3bn | 0.023% | -0.021 pp | -0.017 pp | +6.7% | 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.