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

1 · Sector

Weight and 12M allocation change

Information Technology40.9%+4.04 pp Energy3.9%+1.55 pp Health Care10.6%+0.01 pp Communication Services2.3%-0.19 pp Materials2.0%-0.23 pp Real Estate1.9%-0.31 pp Industrials9.3%-0.48 pp Utilities2.2%-0.48 pp Consumer Staples5.5%-0.92 pp Consumer Discretionary10.8%-1.27 pp Financials10.5%-1.72 pp

2 · Industry

Inside Industrials

Industrial Conglomerates0.29%-0.25 pp Construction Machinery & Heavy Transportation Equipment0.93%+0.23 pp Aerospace & Defense2.39%-0.19 pp Construction & Engineering0.33%+0.17 pp Passenger Ground Transportation0.26%-0.15 pp Electrical Components & Equipment0.74%+0.13 pp Industrial Machinery & Supplies & Components0.82%-0.12 pp Environmental & Facilities Services0.33%-0.12 pp Diversified Support Services0.21%-0.11 pp Building Products0.46%-0.11 pp Human Resource & Employment Services0.26%-0.09 pp Research & Consulting Services0.08%-0.06 pp Rail Transportation0.58%+0.05 pp Cargo Ground Transportation0.14%+0.05 pp Heavy Electrical Equipment0.42%+0.05 pp Air Freight & Logistics0.32%+0.04 pp Trading Companies & Distributors0.27%+0.03 pp Data Processing & Outsourced Services0.03%-0.03 pp Agricultural & Farm Machinery0.29%+0.03 pp Passenger Airlines0.18%-0.01 pp

3 · Sub-industry

Inside Rail Transportation

Rail Transportation0.58%+0.051 pp

Concentrated

Most of this industry's gains came from a few companies.

View all contributions →

Rail Transportation · weight

0.58%

Industry change · 12M

+0.05 pp

Rail Transportation · contribution

+0.051 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Aug 2026 · 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
CSX Corporation → CSX	United States	$93.6bn	0.156%	+0.010 pp	+0.030 pp	+57.4%	Yes
Union Pacific Corporation → UNP	United States	$178.6bn	0.297%	+0.027 pp	+0.023 pp	+37.3%	Yes
Norfolk Southern → NSC	United States	$77.0bn	0.128%	+0.010 pp	-0.002 pp	+24.6%	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.