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
1.41%
Industry change · 12M
+1.41 pp
Electric Utilities · contribution
+1.409 pp
Company participation
8%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2021 · 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 | $75.1bn | 0.264% | -0.004 pp | +0.263 pp | +14.6% | No |
| Southern Company → SO | United States | $65.6bn | 0.230% | +0.004 pp | +0.230 pp | +19.1% | No |
| American Electric Power → AEP | United States | $40.6bn | 0.143% | -0.007 pp | +0.142 pp | +2.8% | No |
| Exelon → EXC | United States | $33.7bn | 0.118% | +0.009 pp | +0.118 pp | +40.1% | Yes |
| Public Service Enterprise Group → PEG | United States | $30.8bn | 0.108% | +0.001 pp | +0.108 pp | +14.7% | No |
| Eversource Energy → ES | United States | $28.1bn | 0.099% | +0.001 pp | +0.099 pp | +0.7% | No |
| WEC Energy Group → WEC | United States | $27.8bn | 0.098% | -0.001 pp | +0.098 pp | -6.4% | No |
| PPL Corporation → PPL | United States | $21.5bn | 0.075% | -0.001 pp | +0.075 pp | +8.5% | No |
| Edison International → EIX | United States | $21.1bn | 0.074% | -0.004 pp | +0.074 pp | +14.1% | No |
| FirstEnergy → FE | United States | $19.4bn | 0.068% | -0.003 pp | +0.068 pp | +29.9% | No |
| Evergy → EVRG | United States | $14.3bn | 0.050% | +0.001 pp | +0.050 pp | +26.9% | No |
| Alliant Energy → LNT | United States | $14.0bn | 0.049% | -0.000 pp | +0.049 pp | +11.6% | No |
| Entergy → ETR | United States | $10.0bn | 0.035% | -0.000 pp | +0.035 pp | +4.5% | 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.