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
1.46%
Industry change · 12M
+0.15 pp
Electric Utilities · contribution
+0.151 pp
Company participation
60%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 |
|---|---|---|---|---|---|---|---|
| Vistra Corp. → VST | United States | $45.3bn | 0.101% | -0.019 pp | +0.101 pp | +147.5% | No |
| Entergy → ETR | United States | $37.6bn | 0.084% | +0.047 pp | +0.053 pp | +78.2% | Yes |
| Edison International → EIX | United States | $21.0bn | 0.047% | -0.028 pp | -0.028 pp | -16.5% | No |
| Constellation Energy → CEG | United States | $78.4bn | 0.175% | -0.002 pp | +0.022 pp | +49.8% | No |
| FirstEnergy → FE | United States | $22.4bn | 0.050% | -0.004 pp | -0.010 pp | +10.4% | No |
| Southern Company → SO | United States | $98.5bn | 0.220% | +0.005 pp | +0.010 pp | +38.1% | Yes |
| Eversource Energy → ES | United States | $23.1bn | 0.052% | -0.000 pp | -0.007 pp | +12.5% | No |
| WEC Energy Group → WEC | United States | $33.9bn | 0.076% | +0.005 pp | +0.005 pp | +41.0% | Yes |
| Exelon → EXC | United States | $44.4bn | 0.099% | +0.012 pp | -0.003 pp | +29.7% | Yes |
| Evergy → EVRG | United States | $15.8bn | 0.035% | +0.003 pp | +0.003 pp | +45.6% | Yes |
| PPL Corporation → PPL | United States | $26.0bn | 0.058% | +0.001 pp | +0.002 pp | +38.2% | Yes |
| American Electric Power → AEP | United States | $56.5bn | 0.126% | +0.009 pp | -0.002 pp | +29.3% | Yes |
| Alliant Energy → LNT | United States | $16.6bn | 0.037% | +0.001 pp | +0.002 pp | +40.0% | Yes |
| Public Service Enterprise Group → PEG | United States | $40.5bn | 0.090% | -0.013 pp | +0.001 pp | +34.2% | No |
| Duke Energy → DUK | United States | $91.2bn | 0.204% | +0.004 pp | +0.001 pp | +32.9% | Yes |
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.