The Union Pacific Railroad (reporting mark UP) (NYSE: UNP), headquartered in Omaha, Nebraska, is the largest railroad network in the United States. It has more than 44,000 employees, more than 8,000 locomotives, and runs on 31,900 route-miles in 23 states west of Chicago and New Orleans. The current chairman is James R. Young. Over the years Union Pacific has purchased many other railroads, notably theMissouri Pacific, Chicago and North Western, Western Pacific, Missouri-Kansas-Texas, and the Southern Pacific (including the Rio Grande). Currently Union Pacific owns 26% of Ferromex while Grupo México owns the remaining 74%. Union Pacific's leading railroad competitor is theBNSF Railway, which covers much of the same territory.