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 Transportation0.77%-0.25 ppIndustrial Conglomerates0.75%-0.13 ppAerospace & Defense2.44%+0.11 ppIndustrial Machinery & Supplies & Components1.11%+0.08 ppPassenger Airlines0.18%-0.08 ppHuman Resource & Employment Services0.44%-0.05 ppConstruction Machinery & Heavy Transportation Equipment0.68%+0.05 ppAgricultural & Farm Machinery0.38%-0.04 ppAir Freight & Logistics0.69%-0.04 ppDiversified Support Services0.15%+0.03 ppHeavy Electrical Equipment0.02%-0.03 ppResearch & Consulting Services0.19%-0.02 ppElectrical Components & Equipment0.60%-0.01 ppConstruction & Engineering0.12%+0.01 ppEnvironmental & Facilities Services0.45%-0.01 ppBuilding Products0.49%+0.01 ppTrading Companies & Distributors0.14%-0.00 ppData Processing & Outsourced Services0.06%-0.00 ppCargo Ground Transportation0.12%-0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Heavy Electrical Equipment
Heavy Electrical Equipment · weight
0.02%
Industry change · 12M
-0.03 pp
Heavy Electrical Equipment · contribution
-0.029 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 |
|---|---|---|---|---|---|---|---|
| Generac → GNRC | United States | $6.3bn | 0.021% | -0.005 pp | -0.029 pp | -53.4% | 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.