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
1.49%
Industry change · 12M
+0.51 pp
Electric Utilities · contribution
+0.511 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 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 | $101.2bn | 0.218% | +0.068 pp | +0.100 pp | +62.2% | Yes |
| Vistra Corp. → VST | United States | $65.8bn | 0.142% | +0.047 pp | +0.086 pp | +127.0% | Yes |
| Southern Company → SO | United States | $100.9bn | 0.218% | -0.022 pp | +0.059 pp | +22.4% | No |
| Entergy → ETR | United States | $35.8bn | 0.077% | -0.010 pp | +0.056 pp | +60.5% | Yes |
| Duke Energy → DUK | United States | $91.7bn | 0.198% | -0.027 pp | +0.053 pp | +22.2% | No |
| American Electric Power → AEP | United States | $55.4bn | 0.120% | -0.019 pp | +0.033 pp | +22.7% | No |
| Exelon → EXC | United States | $43.8bn | 0.095% | -0.015 pp | +0.030 pp | +30.4% | No |
| WEC Energy Group → WEC | United States | $33.3bn | 0.072% | -0.011 pp | +0.025 pp | +37.6% | No |
| Public Service Enterprise Group → PEG | United States | $42.0bn | 0.091% | -0.007 pp | +0.022 pp | +17.7% | No |
| PPL Corporation → PPL | United States | $25.1bn | 0.054% | -0.009 pp | +0.016 pp | +26.5% | No |
| Eversource Energy → ES | United States | $23.4bn | 0.050% | -0.004 pp | +0.013 pp | +17.6% | No |
| Evergy → EVRG | United States | $15.9bn | 0.034% | -0.003 pp | +0.011 pp | +35.7% | No |
| Alliant Energy → LNT | United States | $15.5bn | 0.033% | -0.006 pp | +0.009 pp | +22.9% | No |
| Edison International → EIX | United States | $19.9bn | 0.043% | -0.011 pp | -0.009 pp | -24.8% | No |
| FirstEnergy → FE | United States | $23.2bn | 0.050% | -0.005 pp | +0.009 pp | +9.6% | 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.