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%-0.18 ppConstruction Machinery & Heavy Transportation Equipment0.76%+0.17 ppIndustrial Machinery & Supplies & Components1.16%+0.15 ppElectrical Components & Equipment0.70%+0.14 ppAir Freight & Logistics0.64%-0.12 ppIndustrial Conglomerates0.69%-0.10 ppAerospace & Defense2.37%+0.08 ppEnvironmental & Facilities Services0.41%-0.06 ppBuilding Products0.52%+0.06 ppHuman Resource & Employment Services0.47%-0.05 ppDiversified Support Services0.15%+0.04 ppTrading Companies & Distributors0.16%+0.03 ppHeavy Electrical Equipment0.02%-0.03 ppConstruction & Engineering0.14%+0.02 ppAgricultural & Farm Machinery0.38%-0.02 ppCargo Ground Transportation0.14%+0.02 ppPassenger Airlines0.20%+0.01 ppResearch & Consulting Services0.19%+0.00 ppData Processing & Outsourced Services0.07%-0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Diversified Support Services
Diversified Support Services · weight
0.15%
Industry change · 12M
+0.04 pp
Diversified Support Services · contribution
+0.043 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 |
|---|---|---|---|---|---|---|---|
| Copart → CPRT | United States | $21.4bn | 0.068% | +0.017 pp | +0.043 pp | +49.9% | Yes |
| Cintas → CTAS | United States | $12.8bn | 0.041% | +0.011 pp | +0.004 pp | +25.2% | Yes |
| Leidos → LDOS | United States | $13.4bn | 0.043% | +0.016 pp | -0.004 pp | +4.2% | 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.