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
1.54%
Industry change · 12M
+0.54 pp
Electric Utilities · contribution
+0.540 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 2025 · 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 |
|---|---|---|---|---|---|---|---|
| Constellation Energy → CEG | United States | $109.0bn | 0.230% | +0.062 pp | +0.123 pp | +84.5% | Yes |
| Vistra Corp. → VST | United States | $70.8bn | 0.149% | +0.044 pp | +0.100 pp | +165.1% | Yes |
| Entergy → ETR | United States | $39.0bn | 0.082% | -0.004 pp | +0.060 pp | +61.1% | No |
| Southern Company → SO | United States | $103.9bn | 0.219% | -0.023 pp | +0.055 pp | +17.0% | No |
| Duke Energy → DUK | United States | $94.5bn | 0.199% | -0.028 pp | +0.048 pp | +15.5% | No |
| American Electric Power → AEP | United States | $60.5bn | 0.128% | -0.011 pp | +0.034 pp | +19.6% | No |
| Exelon → EXC | United States | $45.4bn | 0.096% | -0.017 pp | +0.029 pp | +25.5% | No |
| WEC Energy Group → WEC | United States | $34.8bn | 0.073% | -0.010 pp | +0.025 pp | +31.3% | No |
| Public Service Enterprise Group → PEG | United States | $44.8bn | 0.094% | -0.001 pp | +0.023 pp | +16.0% | Yes |
| PPL Corporation → PPL | United States | $26.4bn | 0.056% | -0.009 pp | +0.016 pp | +24.0% | No |
| Edison International → EIX | United States | $20.1bn | 0.042% | -0.007 pp | -0.013 pp | -31.5% | No |
| Evergy → EVRG | United States | $16.3bn | 0.034% | -0.004 pp | +0.010 pp | +27.3% | No |
| Eversource Energy → ES | United States | $24.3bn | 0.051% | -0.001 pp | +0.010 pp | +6.8% | No |
| Alliant Energy → LNT | United States | $16.7bn | 0.035% | -0.002 pp | +0.010 pp | +20.7% | No |
| FirstEnergy → FE | United States | $24.7bn | 0.052% | -0.007 pp | +0.009 pp | +6.2% | 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.