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 Transportation0.36%+0.36 ppAerospace & Defense2.20%-0.21 ppHeavy Electrical Equipment0.22%+0.20 ppAir Freight & Logistics0.42%-0.18 ppRail Transportation0.62%-0.16 ppDiversified Support Services0.37%+0.14 ppIndustrial Conglomerates0.58%-0.11 ppAgricultural & Farm Machinery0.26%-0.10 ppIndustrial Machinery & Supplies & Components1.10%-0.07 ppBuilding Products0.55%+0.07 ppHuman Resource & Employment Services0.40%-0.05 ppElectrical Components & Equipment0.62%-0.04 ppEnvironmental & Facilities Services0.46%-0.04 ppPassenger Airlines0.19%+0.04 ppConstruction Machinery & Heavy Transportation Equipment0.74%+0.03 ppTrading Companies & Distributors0.18%+0.03 ppConstruction & Engineering0.15%+0.02 ppResearch & Consulting Services0.17%-0.01 ppCargo Ground Transportation0.14%+0.01 ppData Processing & Outsourced Services0.06%-0.01 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.62%
Industry change · 12M
-0.16 pp
Rail Transportation · contribution
-0.161 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 |
|---|---|---|---|---|---|---|---|
| Union Pacific Corporation → UNP | United States | $140.7bn | 0.331% | +0.061 pp | -0.100 pp | +14.2% | Yes |
| CSX Corporation → CSX | United States | $64.9bn | 0.152% | +0.029 pp | -0.048 pp | +14.3% | Yes |
| Norfolk Southern → NSC | United States | $56.7bn | 0.133% | +0.032 pp | -0.014 pp | +34.5% | 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.