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 & Defense2.06%-1.97 ppIndustrial Conglomerates0.90%-0.31 ppRail Transportation1.02%+0.11 ppConstruction Machinery & Heavy Transportation Equipment0.58%-0.09 ppBuilding Products0.60%+0.07 ppHeavy Electrical Equipment0.07%+0.07 ppPassenger Airlines0.21%-0.06 ppHuman Resource & Employment Services0.49%+0.05 ppIndustrial Machinery & Supplies & Components1.11%-0.04 ppAir Freight & Logistics0.78%-0.04 ppEnvironmental & Facilities Services0.42%+0.04 ppCargo Ground Transportation0.13%+0.03 ppDiversified Support Services0.11%-0.02 ppElectrical Components & Equipment0.64%+0.02 ppConstruction & Engineering0.10%+0.01 ppTrading Companies & Distributors0.14%+0.01 ppAgricultural & Farm Machinery0.34%-0.00 ppData Processing & Outsourced Services0.07%-0.00 ppResearch & Consulting Services0.23%+0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Electrical Components & Equipment
Electrical Components & Equipment · weight
0.64%
Industry change · 12M
+0.02 pp
Electrical Components & Equipment · contribution
+0.018 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 | $68.9bn | 0.221% | +0.012 pp | +0.027 pp | +46.7% | Yes |
| Emerson Electric → EMR | United States | $55.3bn | 0.177% | -0.021 pp | -0.017 pp | +18.2% | No |
| Rockwell Automation → ROK | United States | $40.5bn | 0.130% | +0.010 pp | +0.012 pp | +41.2% | Yes |
| Ametek → AME | United States | $34.0bn | 0.109% | +0.008 pp | -0.004 pp | +22.3% | 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.