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
+0.10 pp
Electric Utilities · contribution
+0.102 pp
Company participation
27%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 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 | $57.2bn | 0.127% | +0.026 pp | +0.127 pp | +313.7% | Yes |
| Constellation Energy → CEG | United States | $93.8bn | 0.209% | +0.015 pp | +0.093 pp | +147.6% | Yes |
| Edison International → EIX | United States | $20.9bn | 0.046% | -0.028 pp | -0.030 pp | -16.5% | No |
| Duke Energy → DUK | United States | $86.5bn | 0.192% | -0.017 pp | -0.027 pp | +21.6% | No |
| Southern Company → SO | United States | $92.0bn | 0.205% | -0.030 pp | -0.021 pp | +25.2% | No |
| Exelon → EXC | United States | $40.2bn | 0.089% | -0.003 pp | -0.014 pp | +19.7% | No |
| FirstEnergy → FE | United States | $22.9bn | 0.051% | -0.006 pp | -0.012 pp | +13.2% | No |
| Eversource Energy → ES | United States | $21.1bn | 0.047% | -0.008 pp | -0.009 pp | +11.5% | No |
| Entergy → ETR | United States | $17.4bn | 0.039% | -0.000 pp | +0.007 pp | +69.2% | Yes |
| Public Service Enterprise Group → PEG | United States | $41.6bn | 0.093% | -0.012 pp | +0.007 pp | +48.7% | No |
| WEC Energy Group → WEC | United States | $31.4bn | 0.070% | -0.001 pp | -0.006 pp | +27.7% | No |
| American Electric Power → AEP | United States | $52.4bn | 0.116% | -0.007 pp | -0.006 pp | +31.0% | No |
| Alliant Energy → LNT | United States | $15.1bn | 0.034% | -0.003 pp | -0.003 pp | +25.3% | No |
| PPL Corporation → PPL | United States | $24.8bn | 0.055% | -0.001 pp | -0.002 pp | +32.8% | No |
| Evergy → EVRG | United States | $14.8bn | 0.033% | +0.000 pp | -0.002 pp | +32.3% | 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.