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 Industrials
Aerospace & Defense2.09%-0.31 ppRail Transportation0.58%-0.24 ppHeavy Electrical Equipment0.23%+0.20 ppIndustrial Machinery & Supplies & Components1.03%-0.19 ppAir Freight & Logistics0.39%-0.18 ppDiversified Support Services0.34%+0.11 ppIndustrial Conglomerates0.58%-0.10 ppPassenger Ground Transportation0.29%-0.09 ppAgricultural & Farm Machinery0.26%-0.07 ppConstruction Machinery & Heavy Transportation Equipment0.70%-0.07 ppEnvironmental & Facilities Services0.43%-0.06 ppElectrical Components & Equipment0.63%-0.05 ppBuilding Products0.57%+0.05 ppPassenger Airlines0.21%+0.04 ppResearch & Consulting Services0.16%-0.03 ppHuman Resource & Employment Services0.38%-0.03 ppTrading Companies & Distributors0.15%-0.02 ppData Processing & Outsourced Services0.06%-0.01 ppConstruction & Engineering0.14%+0.01 ppCargo Ground Transportation0.12%-0.00 pp
3 · Sub-industry
Inside Electrical Components & Equipment
Electrical Components & Equipment · weight
0.63%
Industry change · 12M
-0.05 pp
Electrical Components & Equipment · contribution
-0.047 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2024 · 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 |
|---|---|---|---|---|---|---|---|
| Rockwell Automation → ROK | United States | $32.3bn | 0.073% | +0.002 pp | -0.033 pp | -6.2% | Yes |
| Ametek → AME | United States | $41.7bn | 0.095% | +0.002 pp | -0.019 pp | +10.0% | Yes |
| Eaton Corporation → ETN | United States | $131.2bn | 0.297% | -0.010 pp | +0.011 pp | +39.5% | Yes |
| Emerson Electric → EMR | United States | $70.7bn | 0.160% | +0.014 pp | -0.005 pp | +29.7% | 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.