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
Universe›Industrials›Rail Transportation›Rail Transportation
Rail Transportation · weight
0.83%
Industry change · 12M
-0.19 pp
Rail Transportation · contribution
-0.190 pp
Company participation
0%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Oct 2022 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Union Pacific Corporation →
UNP
United States$121.2bn0.430%-0.058 pp-0.088 pp-16.6%No
CSX Corporation →
CSX
United States$61.1bn0.217%-0.021 pp-0.051 pp-18.7%No
Norfolk Southern →
NSC
United States$52.8bn0.187%-0.015 pp-0.051 pp-20.8%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.