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 & Defense2.58%+0.23 ppHeavy Electrical Equipment0.37%+0.21 ppAir Freight & Logistics0.29%-0.15 ppRail Transportation0.53%-0.15 ppIndustrial Machinery & Supplies & Components0.95%-0.14 ppDiversified Support Services0.32%+0.10 ppTrading Companies & Distributors0.25%+0.08 ppIndustrial Conglomerates0.54%-0.07 ppCargo Ground Transportation0.09%-0.05 ppPassenger Airlines0.19%+0.05 ppResearch & Consulting Services0.14%-0.04 ppEnvironmental & Facilities Services0.45%-0.04 ppPassenger Ground Transportation0.41%+0.03 ppHuman Resource & Employment Services0.36%-0.03 ppConstruction & Engineering0.15%+0.02 ppConstruction Machinery & Heavy Transportation Equipment0.70%-0.02 ppAgricultural & Farm Machinery0.27%+0.01 ppElectrical Components & Equipment0.60%-0.01 ppBuilding Products0.57%+0.01 ppData Processing & Outsourced Services0.06%+0.00 pp
3 · Sub-industry
Inside Diversified Support Services
Diversified Support Services · weight
0.32%
Industry change · 12M
+0.10 pp
Diversified Support Services · contribution
+0.098 pp
Company participation
33%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 2025 · 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 |
|---|---|---|---|---|---|---|---|
| Cintas → CTAS | United States | $84.6bn | 0.175% | -0.032 pp | +0.126 pp | +5.1% | No |
| Copart → CPRT | United States | $47.2bn | 0.098% | -0.015 pp | -0.025 pp | -7.8% | No |
| Leidos → LDOS | United States | $23.2bn | 0.048% | +0.005 pp | -0.003 pp | +15.4% | 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.