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 Transportation1.01%+0.57 ppIndustrial Machinery & Supplies & Components1.09%+0.53 ppAir Freight & Logistics0.79%+0.40 ppAerospace & Defense2.48%+0.34 ppIndustrial Conglomerates0.87%+0.32 ppElectrical Components & Equipment0.62%+0.30 ppBuilding Products0.52%+0.24 ppHuman Resource & Employment Services0.45%+0.23 ppEnvironmental & Facilities Services0.40%+0.21 ppConstruction Machinery & Heavy Transportation Equipment0.58%+0.20 ppAgricultural & Farm Machinery0.38%+0.16 ppResearch & Consulting Services0.19%+0.10 ppCargo Ground Transportation0.14%+0.09 ppHeavy Electrical Equipment0.07%+0.07 ppPassenger Airlines0.23%+0.07 ppTrading Companies & Distributors0.13%+0.06 ppDiversified Support Services0.11%+0.05 ppConstruction & Engineering0.10%+0.05 ppData Processing & Outsourced Services0.06%+0.03 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Construction & Engineering
Construction & Engineering · weight
0.10%
Industry change · 12M
+0.05 pp
Construction & Engineering · contribution
+0.052 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2022 · 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 |
|---|---|---|---|---|---|---|---|
| Quanta Services → PWR | United States | $15.5bn | 0.054% | -0.001 pp | +0.031 pp | +30.2% | Yes |
| Jacobs Solutions → J | United States | $13.1bn | 0.046% | -0.006 pp | +0.021 pp | +7.6% | 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.