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
1.20%
Industry change · 12M
-0.52 pp
Electric Utilities · contribution
-0.517 pp
Company participation
8%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 |
|---|---|---|---|---|---|---|---|
| Southern Company → SO | United States | $45.2bn | 0.162% | +0.021 pp | -0.097 pp | +2.6% | No |
| Duke Energy → DUK | United States | $61.5bn | 0.220% | +0.038 pp | -0.093 pp | +15.1% | No |
| American Electric Power → AEP | United States | $36.9bn | 0.132% | +0.020 pp | -0.061 pp | +12.7% | No |
| Public Service Enterprise Group → PEG | United States | $26.3bn | 0.094% | +0.009 pp | -0.056 pp | +3.9% | No |
| Evergy → EVRG | United States | $15.0bn | 0.053% | +0.015 pp | +0.053 pp | +13.4% | Yes |
| PPL Corporation → PPL | United States | $20.4bn | 0.073% | +0.008 pp | -0.052 pp | -5.8% | No |
| Edison International → EIX | United States | $18.5bn | 0.066% | -0.004 pp | -0.050 pp | -5.6% | No |
| Eversource Energy → ES | United States | $20.6bn | 0.074% | +0.012 pp | -0.040 pp | +6.6% | No |
| Exelon → EXC | United States | $31.1bn | 0.111% | +0.015 pp | -0.039 pp | +21.1% | No |
| WEC Energy Group → WEC | United States | $21.9bn | 0.078% | +0.011 pp | -0.038 pp | +11.5% | No |
| Alliant Energy → LNT | United States | $10.0bn | 0.036% | +0.004 pp | -0.017 pp | +8.8% | No |
| FirstEnergy → FE | United States | $19.2bn | 0.069% | +0.011 pp | -0.015 pp | +19.0% | No |
| Entergy → ETR | United States | $7.8bn | 0.028% | +0.004 pp | -0.013 pp | +14.4% | 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.