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 Technology25.6%+25.56 pp Health Care15.7%+15.64 pp Industrials12.8%+12.82 pp Consumer Discretionary7.4%+7.37 pp Consumer Staples7.2%+7.19 pp Communication Services4.6%+4.56 pp Materials3.5%+3.50 pp Utilities3.1%+3.09 pp Real Estate3.1%+3.08 pp Energy2.4%+2.35 pp Financials14.7%-85.17 pp

2 · Industry

Inside Industrials

Aerospace & Defense4.42%+4.41 pp Industrial Machinery & Supplies & Components1.18%+1.18 pp Industrial Conglomerates1.12%+1.12 pp Air Freight & Logistics0.91%+0.91 pp Rail Transportation0.88%+0.88 pp Construction Machinery & Heavy Transportation Equipment0.74%+0.74 pp Electrical Components & Equipment0.63%+0.63 pp Building Products0.59%+0.59 pp Human Resource & Employment Services0.43%+0.43 pp Agricultural & Farm Machinery0.40%+0.40 pp Environmental & Facilities Services0.40%+0.40 pp Passenger Airlines0.31%+0.31 pp Research & Consulting Services0.20%+0.20 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 Equipment0.07%+0.07 pp Data Processing & Outsourced Services0.07%+0.07 pp Passenger Ground Transportation0.00%+0.00 pp

3 · Sub-industry

Inside Rail Transportation

Rail Transportation0.88%+0.876 pp

Concentrated

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

View all contributions →

Rail Transportation · weight

0.88%

Industry change · 12M

+0.88 pp

Rail Transportation · contribution

+0.876 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

May 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	$149.3bn	0.535%	+0.259 pp	+0.534 pp	+34.9%	Yes
Norfolk Southern → NSC	United States	$70.3bn	0.252%	+0.125 pp	+0.252 pp	+60.2%	Yes
CSX Corporation → CSX	United States	$25.3bn	0.091%	+0.044 pp	+0.090 pp	+41.6%	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.