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 & Defense2.46%+0.32 ppIndustrial Machinery & Supplies & Components0.91%-0.20 ppDiversified Support Services0.27%-0.12 ppHuman Resource & Employment Services0.28%-0.11 ppHeavy Electrical Equipment0.34%+0.11 ppAir Freight & Logistics0.31%-0.10 ppRail Transportation0.53%-0.09 ppConstruction Machinery & Heavy Transportation Equipment0.84%+0.09 ppElectrical Components & Equipment0.59%-0.08 ppConstruction & Engineering0.22%+0.07 ppCargo Ground Transportation0.09%-0.06 ppIndustrial Conglomerates0.53%-0.06 ppEnvironmental & Facilities Services0.41%-0.05 ppResearch & Consulting Services0.11%-0.05 ppBuilding Products0.51%-0.05 ppAgricultural & Farm Machinery0.25%-0.03 ppPassenger Ground Transportation0.36%+0.02 ppPassenger Airlines0.18%-0.02 ppTrading Companies & Distributors0.19%+0.01 ppData Processing & Outsourced Services0.05%-0.01 pp
3 · Sub-industry
Inside Electrical Components & Equipment
Electrical Components & Equipment · weight
0.59%
Industry change · 12M
-0.08 pp
Electrical Components & Equipment · contribution
-0.079 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 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 |
|---|---|---|---|---|---|---|---|
| Eaton Corporation → ETN | United States | $134.3bn | 0.264% | -0.018 pp | -0.063 pp | -6.7% | No |
| Emerson Electric → EMR | United States | $74.9bn | 0.147% | -0.007 pp | -0.020 pp | +2.3% | No |
| Rockwell Automation → ROK | United States | $44.4bn | 0.087% | +0.007 pp | +0.014 pp | +36.3% | Yes |
| Ametek → AME | United States | $45.6bn | 0.089% | +0.001 pp | -0.010 pp | +2.5% | 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.