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
1.53%
Industry change · 12M
+0.19 pp
Electric Utilities · contribution
+0.195 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 | $39.8bn | 0.095% | -0.012 pp | +0.095 pp | +70.0% | No |
| Entergy → ETR | United States | $36.8bn | 0.087% | +0.050 pp | +0.056 pp | +67.7% | Yes |
| Southern Company → SO | United States | $100.9bn | 0.239% | +0.035 pp | +0.022 pp | +32.6% | Yes |
| Edison International → EIX | United States | $22.7bn | 0.054% | -0.016 pp | -0.022 pp | -14.1% | No |
| Duke Energy → DUK | United States | $94.7bn | 0.225% | +0.036 pp | +0.018 pp | +31.0% | Yes |
| American Electric Power → AEP | United States | $58.2bn | 0.138% | +0.027 pp | +0.013 pp | +31.8% | Yes |
| Constellation Energy → CEG | United States | $63.1bn | 0.150% | -0.009 pp | -0.013 pp | +9.8% | No |
| WEC Energy Group → WEC | United States | $34.6bn | 0.082% | +0.015 pp | +0.010 pp | +37.6% | Yes |
| PPL Corporation → PPL | United States | $26.7bn | 0.063% | +0.009 pp | +0.007 pp | +35.6% | Yes |
| FirstEnergy → FE | United States | $23.3bn | 0.055% | +0.003 pp | -0.006 pp | +9.1% | Yes |
| Exelon → EXC | United States | $46.3bn | 0.110% | +0.024 pp | +0.006 pp | +27.6% | Yes |
| Public Service Enterprise Group → PEG | United States | $41.0bn | 0.097% | +0.002 pp | +0.005 pp | +27.1% | Yes |
| Eversource Energy → ES | United States | $22.8bn | 0.054% | +0.006 pp | -0.004 pp | +8.9% | Yes |
| Evergy → EVRG | United States | $15.9bn | 0.038% | +0.006 pp | +0.004 pp | +34.9% | Yes |
| Alliant Energy → LNT | United States | $16.5bn | 0.039% | +0.005 pp | +0.003 pp | +32.2% | 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.