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 & Defense2.75%-4.33 ppIndustrial Conglomerates0.68%-0.69 ppIndustrial Machinery & Supplies & Components0.53%-0.55 ppAir Freight & Logistics0.45%-0.53 ppConstruction Machinery & Heavy Transportation Equipment0.39%-0.44 ppRail Transportation0.57%-0.37 ppElectrical Components & Equipment0.36%-0.36 ppPassenger Airlines0.30%-0.25 ppBuilding Products0.23%-0.24 ppHuman Resource & Employment Services0.29%-0.16 ppAgricultural & Farm Machinery0.17%-0.14 ppEnvironmental & Facilities Services0.24%-0.11 ppResearch & Consulting Services0.10%-0.08 ppTrading Companies & Distributors0.04%-0.07 ppData Processing & Outsourced Services0.04%+0.04 ppCargo Ground Transportation0.04%-0.04 ppConstruction & Engineering0.04%-0.03 ppDiversified Support Services0.03%+0.00 ppHeavy Electrical Equipment0.00%+0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Construction & Engineering
Construction & Engineering · weight
0.04%
Industry change · 12M
-0.03 pp
Construction & Engineering · contribution
-0.031 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2018 · 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 | $4.4bn | 0.016% | +0.000 pp | -0.016 pp | -21.7% | No |
| Jacobs Solutions → J | United States | $6.9bn | 0.025% | -0.004 pp | -0.015 pp | -15.1% | 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.