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 & Defense4.02%+4.02 ppIndustrial Machinery & Supplies & Components1.09%+1.08 ppIndustrial Conglomerates0.96%+0.96 ppRail Transportation0.89%+0.89 ppAir Freight & Logistics0.73%+0.73 ppElectrical Components & Equipment0.63%+0.63 ppConstruction Machinery & Heavy Transportation Equipment0.60%+0.60 ppBuilding Products0.58%+0.58 ppHuman Resource & Employment Services0.44%+0.44 ppEnvironmental & Facilities Services0.42%+0.42 ppAgricultural & Farm Machinery0.36%+0.36 ppPassenger Airlines0.26%+0.26 ppResearch & Consulting Services0.22%+0.22 ppTrading Companies & Distributors0.14%+0.14 ppCargo Ground Transportation0.12%+0.12 ppDiversified Support Services0.11%+0.11 ppConstruction & Engineering0.11%+0.11 ppHeavy Electrical Equipment0.09%+0.09 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
+0.626 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 | $59.5bn | 0.209% | +0.000 pp | +0.209 pp | +49.6% | No |
| Emerson Electric → EMR | United States | $56.3bn | 0.198% | -0.006 pp | +0.198 pp | +47.0% | No |
| Rockwell Automation → ROK | United States | $34.1bn | 0.120% | +0.003 pp | +0.120 pp | +35.4% | Yes |
| Ametek → AME | United States | $28.7bn | 0.101% | -0.008 pp | +0.101 pp | +25.5% | 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.