1. Union Pacific Corporation: Based in the United States, Union Pacific is the largest publicly-traded railroad company in North America. It operates an extensive rail network covering 23 states in the western part of the US.
2. BNSF Railway: Also headquartered in the United States, BNSF Railway is one of the largest freight railroad networks in North America. It operates in 28 states across the western, central, and southern parts of the US.
3. Chinese Railways (CR): China's national railway operator, Chinese Railways, is one of the largest rail companies in the world. It manages an extensive network of both passenger and freight trains, connecting various cities and regions within China.
4. Russian Railways (RZD): With an extensive network that spans across Russia and connects neighboring countries, Russian Railways is one of the largest railway companies in the world. It operates both passenger and freight services.
5. Indian Railways: India's national railway system, Indian Railways, is one of the largest in the world based on network size and passenger volume. It operates an extensive network across the country and carries millions of passengers daily.
6. Deutsche Bahn AG: Based in Germany, Deutsche Bahn is one of the largest rail operators in Europe. It operates both passenger and freight services across Germany and other European countries.
7. Canadian National Railway (CN): As the largest railway company in Canada, Canadian National Railway operates an extensive network spanning across Canada and into the United States. It primarily focuses on freight transportation.
8. CSX Corporation: Headquartered in the United States, CSX Corporation is a leading freight transportation provider in North America. It operates a vast rail network primarily in the eastern part of the US.
9. Norfolk Southern Corporation: Also based in the United States, Norfolk Southern is a major rail company operating primarily in the eastern part of the country. It provides freight transportation services across a substantial network.
10. Japan Railways Group (JR Group): Japan Railways Group consists of multiple companies operating rail services throughout Japan. It includes passenger services such as the famous Shinkansen (bullet trains) and various regional and local lines.