Metronom Eisenbahngesellschaft mbH is a non-federally owned railroad company based in Uelzen and is one of Germany's largest private railroads, carrying more than 100,000 passengers a day.

RheinCargo GmbH & Co. KG, headquartered in Neuss, is a joint venture between Häfen und Güterverkehr Köln AG and Neuss-Düsseldorfer Häfen GmbH & Co. KG, each of which owns 50 %.

Railpool GmbH, headquartered in Munich, is a leasing company of locomotives and rail vehicles for freight and passenger transport, active in 14 European countries.

Thameslink is a major railway service in the United Kingdom that connects a wide range of destinations across London and the South East of England. It operates under the Govia Thameslink Railway franchise and is an essential part of the UK's rail network, serving both commuters and travelers.

Southern is a train operating company in the United Kingdom that provides passenger rail services in the South of England. It is part of the National Rail network and operates under the Southern brand.

Southeastern is a train operating company in the United Kingdom that provides passenger rail services in the Southeast of England. It is part of the National Rail network and operates under the Southeastern brand.

The Long Island Rail Road (LIRR) is a commuter rail system in the United States that serves the Long Island region of New York. It is the busiest commuter railroad in North America and is operated by the Metropolitan Transportation Authority (MTA), a public transportation agency responsible for the New York metropolitan area's public transit.

Great Western Railway (GWR) is a train operating company in the United Kingdom that provides passenger rail services in the South West, West, and South Wales regions of England and Wales. It is part of the National Rail network and operates under the Great Western Railway brand.

BNSF Railway, often simply referred to as BNSF, is one of the largest Class I freight railroads in the United States. It is headquartered in Fort Worth, Texas, and is a subsidiary of Berkshire Hathaway Inc., the multinational conglomerate owned by Warren Buffett.

Caltrain is a commuter rail service in the San Francisco Bay Area of California, United States. It provides transportation between San Francisco, San Jose, and surrounding communities on the San Francisco Peninsula and the Santa Clara Valley.

Union Pacific Railroad is one of the largest and oldest Class I freight railroads in the United States. It has a rich history dating back to the 19th century and plays a crucial role in freight transportation and logistics in North America.

CSX Transportation, Inc., is one of the major Class I freight railroads in the United States. It operates an extensive rail network covering large portions of the Eastern United States, with connections to Canada and the Gulf of Mexico.

SNCF (Société Nationale des Chemins de fer Français) is the national state-owned railway company of France. It was established in 1938 and operates most of France's railway services, including passenger and freight transport. SNCF is one of the largest and most well-known railway companies in Europe, providing domestic and international train services.

SBB CFF FFS is the national railway company of Switzerland. The company's name stands for "Schweizerische Bundesbahnen" in German, "Chemins de fer fédéraux suisses" in French, and "Ferrovie federali svizzere" in Italian, which all translate to "Swiss Federal Railways" in English.

The Rhaetian Railway (RhB) is a Swiss railway company that operates in the canton of Graubünden, Switzerland. It is known for its extensive narrow-gauge network and scenic routes through the Swiss Alps. The RhB is one of the most famous and picturesque railroads in the world, attracting tourists and railway enthusiasts from all over.

The Nederlandse Spoorwegen (Dutch Railways), commonly known as NS, is the primary railway company in the Netherlands. It is responsible for managing and operating the national railway network, including passenger and freight train services. NS was established in 1938 as a state-owned company and is owned by the Dutch government.