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
Passenger Ground Transportation0.44%+0.44 ppAir Freight & Logistics0.53%-0.20 ppConstruction Machinery & Heavy Transportation Equipment0.87%+0.16 ppIndustrial Machinery & Supplies & Components1.28%+0.14 ppIndustrial Conglomerates0.61%-0.12 ppAerospace & Defense2.36%-0.12 ppDiversified Support Services0.25%+0.11 ppElectrical Components & Equipment0.74%+0.10 ppAgricultural & Farm Machinery0.32%-0.10 ppEnvironmental & Facilities Services0.53%+0.09 ppBuilding Products0.56%+0.05 ppTrading Companies & Distributors0.20%+0.05 ppHuman Resource & Employment Services0.41%-0.05 ppConstruction & Engineering0.15%+0.03 ppRail Transportation0.78%-0.02 ppPassenger Airlines0.18%-0.01 ppData Processing & Outsourced Services0.07%+0.01 ppCargo Ground Transportation0.12%-0.00 ppHeavy Electrical Equipment0.02%-0.00 ppResearch & Consulting Services0.19%-0.00 pp
3 · Sub-industry
Inside Construction & Engineering
Construction & Engineering · weight
0.15%
Industry change · 12M
+0.03 pp
Construction & Engineering · contribution
+0.025 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2024 · 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 | $37.9bn | 0.105% | +0.012 pp | +0.023 pp | +56.2% | Yes |
| Jacobs Solutions → J | United States | $16.0bn | 0.044% | +0.004 pp | +0.002 pp | +31.9% | 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.