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 & Defense4.42%+4.41 ppIndustrial Machinery & Supplies & Components1.18%+1.18 ppIndustrial Conglomerates1.12%+1.12 ppAir Freight & Logistics0.91%+0.91 ppRail Transportation0.88%+0.88 ppConstruction Machinery & Heavy Transportation Equipment0.74%+0.74 ppElectrical Components & Equipment0.63%+0.63 ppBuilding Products0.59%+0.59 ppHuman Resource & Employment Services0.43%+0.43 ppAgricultural & Farm Machinery0.40%+0.40 ppEnvironmental & Facilities Services0.40%+0.40 ppPassenger Airlines0.31%+0.31 ppResearch & Consulting Services0.20%+0.20 ppTrading Companies & Distributors0.14%+0.14 ppCargo Ground Transportation0.12%+0.12 ppDiversified Support Services0.11%+0.11 ppConstruction & Engineering0.10%+0.10 ppHeavy Electrical Equipment0.07%+0.07 ppData Processing & Outsourced Services0.07%+0.07 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Electrical Components & Equipment
Electrical Components & Equipment · weight
0.63%
Industry change · 12M
+0.63 pp
Electrical Components & Equipment · contribution
+0.634 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 |
|---|---|---|---|---|---|---|---|
| Eaton Corporation → ETN | United States | $57.9bn | 0.207% | +0.104 pp | +0.207 pp | +75.4% | Yes |
| Emerson Electric → EMR | United States | $57.4bn | 0.206% | +0.103 pp | +0.205 pp | +60.8% | Yes |
| Ametek → AME | United States | $31.2bn | 0.112% | +0.057 pp | +0.112 pp | +48.3% | Yes |
| Rockwell Automation → ROK | United States | $30.6bn | 0.110% | +0.053 pp | +0.110 pp | +24.1% | 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.