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
Industrial Machinery & Supplies & Components1.03%-0.24 ppRail Transportation0.59%-0.23 ppHeavy Electrical Equipment0.22%+0.21 ppAir Freight & Logistics0.37%-0.15 ppConstruction Machinery & Heavy Transportation Equipment0.68%-0.15 ppElectrical Components & Equipment0.58%-0.14 ppPassenger Ground Transportation0.36%-0.12 ppDiversified Support Services0.34%+0.10 ppAerospace & Defense2.24%-0.08 ppTrading Companies & Distributors0.14%-0.05 ppEnvironmental & Facilities Services0.49%-0.04 ppResearch & Consulting Services0.16%-0.04 ppConstruction & Engineering0.12%-0.02 ppPassenger Airlines0.20%+0.02 ppHuman Resource & Employment Services0.41%-0.01 ppCargo Ground Transportation0.12%-0.01 ppBuilding Products0.55%+0.01 ppData Processing & Outsourced Services0.06%-0.01 ppIndustrial Conglomerates0.59%-0.00 ppAgricultural & Farm Machinery0.29%+0.00 pp
3 · Sub-industry
Inside Trading Companies & Distributors
Trading Companies & Distributors · weight
0.14%
Industry change · 12M
-0.05 pp
Trading Companies & Distributors · contribution
-0.051 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 |
|---|---|---|---|---|---|---|---|
| United Rentals → URI | United States | $41.9bn | 0.094% | -0.032 pp | -0.040 pp | -6.5% | No |
| Fastenal → FAST | United States | $21.7bn | 0.049% | -0.004 pp | -0.011 pp | +6.1% | 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.