The Canadian National Railway Company is a Class I railway. Its headquarters are in Montreal, Quebec. It serves Canada and both the Midwestern and Southern United States. In 2011, Bill Gates was the largest single shareholder of CN stock. CN owns around 20,400 route miles (32,831 km) of track in eight provinces. There is also a 70-mile (113 km) stretch of track into the Northwest Territories, to Hay River on the southern shore of Great Slave Lake.