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
1.44%
Industry change · 12M
+1.44 pp
Electric Utilities · contribution
+1.437 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 2021 · 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 |
|---|---|---|---|---|---|---|---|
| Duke Energy → DUK | United States | $80.5bn | 0.269% | -0.007 pp | +0.269 pp | +35.5% | Yes |
| Southern Company → SO | United States | $69.6bn | 0.233% | -0.010 pp | +0.232 pp | +31.2% | Yes |
| American Electric Power → AEP | United States | $44.8bn | 0.150% | -0.004 pp | +0.150 pp | +17.6% | Yes |
| Exelon → EXC | United States | $34.2bn | 0.114% | +0.002 pp | +0.114 pp | +37.6% | Yes |
| Public Service Enterprise Group → PEG | United States | $32.3bn | 0.108% | -0.004 pp | +0.108 pp | +26.8% | Yes |
| Eversource Energy → ES | United States | $31.2bn | 0.104% | +0.004 pp | +0.104 pp | +8.9% | Yes |
| WEC Energy Group → WEC | United States | $29.8bn | 0.100% | -0.006 pp | +0.100 pp | +3.3% | Yes |
| PPL Corporation → PPL | United States | $22.6bn | 0.076% | -0.005 pp | +0.075 pp | +12.6% | Yes |
| Edison International → EIX | United States | $22.0bn | 0.073% | -0.003 pp | +0.073 pp | +15.4% | Yes |
| FirstEnergy → FE | United States | $21.2bn | 0.071% | -0.003 pp | +0.071 pp | +42.4% | Yes |
| Evergy → EVRG | United States | $15.7bn | 0.052% | +0.002 pp | +0.052 pp | +33.3% | Yes |
| Alliant Energy → LNT | United States | $15.2bn | 0.051% | -0.000 pp | +0.051 pp | +15.6% | Yes |
| Entergy → ETR | United States | $11.1bn | 0.037% | -0.001 pp | +0.037 pp | +15.7% | 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.