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
+0.06 pp
Electric Utilities · contribution
+0.056 pp
Company participation
13%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $64.1bn | 0.133% | +0.009 pp | +0.062 pp | +122.9% | Yes |
| Constellation Energy → CEG | United States | $96.2bn | 0.199% | -0.018 pp | +0.051 pp | +57.5% | Yes |
| Entergy → ETR | United States | $39.3bn | 0.082% | +0.000 pp | +0.050 pp | +50.3% | No |
| Edison International → EIX | United States | $21.6bn | 0.045% | -0.004 pp | -0.036 pp | -32.1% | No |
| Southern Company → SO | United States | $101.5bn | 0.210% | -0.014 pp | -0.018 pp | +10.4% | No |
| Duke Energy → DUK | United States | $95.3bn | 0.197% | -0.010 pp | -0.015 pp | +11.5% | No |
| Public Service Enterprise Group → PEG | United States | $41.1bn | 0.085% | -0.006 pp | -0.012 pp | +5.1% | No |
| Eversource Energy → ES | United States | $23.8bn | 0.049% | -0.005 pp | -0.009 pp | -0.5% | No |
| FirstEnergy → FE | United States | $25.2bn | 0.052% | -0.003 pp | -0.009 pp | +3.5% | No |
| American Electric Power → AEP | United States | $59.4bn | 0.123% | -0.002 pp | -0.006 pp | +14.8% | No |
| Alliant Energy → LNT | United States | $16.7bn | 0.035% | -0.002 pp | -0.001 pp | +15.4% | No |
| Evergy → EVRG | United States | $16.4bn | 0.034% | -0.001 pp | +0.001 pp | +25.4% | No |
| PPL Corporation → PPL | United States | $27.0bn | 0.056% | -0.002 pp | -0.001 pp | +18.0% | No |
| Exelon → EXC | United States | $44.1bn | 0.091% | -0.009 pp | -0.001 pp | +19.0% | No |
| WEC Energy Group → WEC | United States | $34.3bn | 0.071% | -0.007 pp | +0.000 pp | +18.5% | 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.