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
1.88%
Industry change · 12M
+0.16 pp
Electric Utilities · contribution
+0.164 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2018 · 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 | $56.1bn | 0.345% | +0.031 pp | +0.031 pp | +3.3% | Yes |
| Southern Company → SO | United States | $46.5bn | 0.286% | +0.027 pp | +0.027 pp | +3.6% | Yes |
| American Electric Power → AEP | United States | $34.5bn | 0.212% | +0.019 pp | +0.019 pp | +2.7% | Yes |
| FirstEnergy → FE | United States | $16.4bn | 0.101% | +0.017 pp | +0.017 pp | +5.8% | Yes |
| Exelon → EXC | United States | $27.3bn | 0.168% | +0.017 pp | +0.017 pp | +4.0% | Yes |
| Edison International → EIX | United States | $21.3bn | 0.131% | +0.015 pp | +0.015 pp | +5.8% | Yes |
| Public Service Enterprise Group → PEG | United States | $26.3bn | 0.162% | +0.012 pp | +0.012 pp | +1.5% | Yes |
| WEC Energy Group → WEC | United States | $20.3bn | 0.125% | +0.009 pp | +0.009 pp | +0.9% | Yes |
| Alliant Energy → LNT | United States | $9.9bn | 0.061% | +0.009 pp | +0.009 pp | +8.9% | Yes |
| Entergy → ETR | United States | $7.4bn | 0.045% | +0.005 pp | +0.005 pp | +5.0% | Yes |
| Eversource Energy → ES | United States | $19.1bn | 0.117% | +0.003 pp | +0.003 pp | -3.6% | Yes |
| PPL Corporation → PPL | United States | $20.2bn | 0.124% | -0.001 pp | -0.001 pp | -7.3% | 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.