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 & Defense2.29%-1.61 ppIndustrial Conglomerates0.79%-0.22 ppBuilding Products0.47%-0.15 ppIndustrial Machinery & Supplies & Components1.01%-0.12 ppElectrical Components & Equipment0.56%-0.10 ppHuman Resource & Employment Services0.52%+0.09 ppEnvironmental & Facilities Services0.47%+0.06 ppPassenger Airlines0.19%-0.05 ppHeavy Electrical Equipment0.05%-0.04 ppConstruction Machinery & Heavy Transportation Equipment0.59%-0.03 ppResearch & Consulting Services0.19%-0.03 ppConstruction & Engineering0.12%+0.02 ppRail Transportation0.95%+0.02 ppTrading Companies & Distributors0.12%-0.01 ppAgricultural & Farm Machinery0.40%+0.01 ppData Processing & Outsourced Services0.07%+0.00 ppAir Freight & Logistics0.77%-0.00 ppCargo Ground Transportation0.12%+0.00 ppDiversified Support Services0.11%-0.00 ppPassenger Ground Transportation0.00%+0.00 pp
3 · Sub-industry
Inside Rail Transportation
Rail Transportation · weight
0.95%
Industry change · 12M
+0.02 pp
Rail Transportation · contribution
+0.021 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 2022 · 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 | $140.2bn | 0.502% | +0.005 pp | +0.029 pp | +5.8% | No |
| Norfolk Southern → NSC | United States | $57.1bn | 0.204% | -0.001 pp | -0.005 pp | -2.4% | No |
| CSX Corporation → CSX | United States | $67.8bn | 0.243% | -0.006 pp | -0.003 pp | -1.5% | 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.