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
Rail Transportation0.80%-0.30 ppAerospace & Defense2.47%+0.11 ppIndustrial Machinery & Supplies & Components1.14%+0.11 ppIndustrial Conglomerates0.74%-0.11 ppConstruction Machinery & Heavy Transportation Equipment0.71%+0.08 ppAir Freight & Logistics0.73%-0.05 ppHeavy Electrical Equipment0.02%-0.04 ppPassenger Airlines0.19%-0.04 ppHuman Resource & Employment Services0.46%-0.03 ppDiversified Support Services0.14%+0.03 ppResearch & Consulting Services0.19%-0.03 ppElectrical Components & Equipment0.63%+0.02 ppEnvironmental & Facilities Services0.44%+0.02 ppAgricultural & Farm Machinery0.42%-0.01 ppConstruction & Engineering0.12%+0.01 ppBuilding Products0.50%+0.01 ppCargo Ground Transportation0.13%-0.00 ppData Processing & Outsourced Services0.06%-0.00 ppTrading Companies & Distributors0.15%+0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Electrical Components & Equipment
Electrical Components & Equipment · weight
0.63%
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
Mar 2023 · 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 | $68.2bn | 0.233% | +0.007 pp | +0.029 pp | +15.3% | Yes |
| Emerson Electric → EMR | United States | $49.8bn | 0.170% | -0.035 pp | -0.026 pp | -9.0% | No |
| Ametek → AME | United States | $33.4bn | 0.114% | -0.002 pp | +0.010 pp | +9.9% | Yes |
| Rockwell Automation → ROK | United States | $33.7bn | 0.115% | +0.008 pp | +0.005 pp | +6.8% | 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.