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 Technology34.6%+14.94 pp Financials12.3%+4.16 pp Consumer Discretionary12.0%+4.02 pp Industrials10.1%+2.81 pp Consumer Staples7.3%+1.96 pp Communication Services2.7%+0.87 pp Health Care11.2%+0.85 pp Utilities2.9%+0.76 pp Real Estate2.4%+0.60 pp Energy2.3%+0.18 pp Materials2.3%-31.15 pp

2 · Industry

Inside Industrials

Aerospace & Defense2.57%+0.86 pp Building Products0.62%+0.22 pp Heavy Electrical Equipment0.31%+0.20 pp Diversified Support Services0.36%+0.19 pp Industrial Machinery & Supplies & Components1.00%+0.17 pp Environmental & Facilities Services0.52%+0.16 pp Human Resource & Employment Services0.43%+0.15 pp Industrial Conglomerates0.59%+0.15 pp Passenger Ground Transportation0.40%+0.14 pp Agricultural & Farm Machinery0.31%+0.11 pp Construction Machinery & Heavy Transportation Equipment0.66%+0.11 pp Electrical Components & Equipment0.61%+0.10 pp Rail Transportation0.56%+0.07 pp Research & Consulting Services0.17%+0.05 pp Passenger Airlines0.17%+0.05 pp Construction & Engineering0.15%+0.04 pp Trading Companies & Distributors0.16%+0.04 pp Air Freight & Logistics0.31%-0.02 pp Data Processing & Outsourced Services0.06%+0.02 pp Cargo Ground Transportation0.11%+0.00 pp

3 · Sub-industry

Inside Rail Transportation

Rail Transportation0.56%+0.066 pp

Concentrated

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

View all contributions →

Rail Transportation · weight

0.56%

Industry change · 12M

+0.07 pp

Rail Transportation · contribution

+0.066 pp

Company participation

33%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

May 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
Norfolk Southern → NSC	United States	$55.7bn	0.126%	+0.002 pp	+0.029 pp	+12.4%	Yes
Union Pacific Corporation → UNP	United States	$132.4bn	0.300%	-0.033 pp	+0.029 pp	-2.6%	No
CSX Corporation → CSX	United States	$59.3bn	0.134%	-0.001 pp	+0.008 pp	-5.0%	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.