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 Technology27.9%+27.90 pp Health Care16.3%+16.24 pp Industrials12.0%+11.94 pp Consumer Discretionary7.1%+7.11 pp Consumer Staples7.0%+6.96 pp Communication Services4.3%+4.32 pp Materials3.3%+3.25 pp Real Estate3.2%+3.20 pp Utilities3.1%+3.05 pp Energy2.0%+2.04 pp Financials13.9%-86.02 pp

2 · Industry

Inside Industrials

Aerospace & Defense3.90%+3.90 pp Industrial Machinery & Supplies & Components1.13%+1.13 pp Industrial Conglomerates1.01%+1.01 pp Rail Transportation0.93%+0.93 pp Air Freight & Logistics0.77%+0.77 pp Electrical Components & Equipment0.67%+0.67 pp Construction Machinery & Heavy Transportation Equipment0.62%+0.62 pp Building Products0.61%+0.61 pp Human Resource & Employment Services0.43%+0.43 pp Environmental & Facilities Services0.41%+0.41 pp Agricultural & Farm Machinery0.39%+0.39 pp Passenger Airlines0.24%+0.24 pp Research & Consulting Services0.22%+0.22 pp Trading Companies & Distributors0.14%+0.14 pp Cargo Ground Transportation0.12%+0.12 pp Diversified Support Services0.11%+0.11 pp Construction & Engineering0.10%+0.10 pp Heavy Electrical Equipment0.09%+0.09 pp Data Processing & Outsourced Services0.07%+0.07 pp Passenger Ground Transportation0.00%+0.00 pp

3 · Sub-industry

Inside Rail Transportation

Rail Transportation0.93%+0.926 pp

Concentrated

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

View all contributions →

Rail Transportation · weight

0.93%

Industry change · 12M

+0.93 pp

Rail Transportation · contribution

+0.926 pp

Company participation

67%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Aug 2021 · 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	$141.4bn	0.473%	-0.062 pp	+0.472 pp	+14.8%	Yes
CSX Corporation → CSX	United States	$73.3bn	0.245%	+0.155 pp	+0.245 pp	+29.1%	Yes
Norfolk Southern → NSC	United States	$62.6bn	0.209%	-0.042 pp	+0.209 pp	+21.2%	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.