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
1.34%
Industry change · 12M
-0.06 pp
Electric Utilities · contribution
-0.062 pp
Company participation
7%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2026 · 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 |
|---|---|---|---|---|---|---|---|
| Entergy → ETR | United States | $42.8bn | 0.082% | -0.002 pp | +0.043 pp | +21.6% | No |
| Constellation Energy → CEG | United States | $87.7bn | 0.168% | -0.063 pp | -0.041 pp | -5.9% | No |
| Vistra Corp. → VST | United States | $53.7bn | 0.103% | -0.022 pp | -0.024 pp | -5.2% | No |
| Southern Company → SO | United States | $98.3bn | 0.188% | -0.015 pp | -0.016 pp | +9.9% | No |
| Public Service Enterprise Group → PEG | United States | $41.1bn | 0.079% | -0.000 pp | -0.014 pp | +1.8% | No |
| Duke Energy → DUK | United States | $94.4bn | 0.181% | -0.009 pp | -0.012 pp | +12.3% | No |
| American Electric Power → AEP | United States | $64.1bn | 0.123% | -0.003 pp | +0.006 pp | +26.0% | No |
| PPL Corporation → PPL | United States | $26.8bn | 0.051% | -0.002 pp | -0.004 pp | +11.4% | No |
| Exelon → EXC | United States | $45.2bn | 0.087% | -0.005 pp | -0.003 pp | +16.0% | No |
| Eversource Energy → ES | United States | $25.9bn | 0.050% | -0.004 pp | +0.003 pp | +25.6% | No |
| FirstEnergy → FE | United States | $27.3bn | 0.052% | +0.000 pp | +0.001 pp | +23.9% | No |
| Alliant Energy → LNT | United States | $16.9bn | 0.032% | -0.001 pp | -0.001 pp | +15.5% | No |
| Evergy → EVRG | United States | $17.7bn | 0.034% | -0.001 pp | +0.001 pp | +24.3% | No |
| WEC Energy Group → WEC | United States | $36.0bn | 0.069% | -0.002 pp | -0.001 pp | +15.3% | No |
| Edison International → EIX | United States | $24.0bn | 0.046% | +0.004 pp | -0.001 pp | +22.6% | 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.