Corporation, becoming a second incarnation of the Southern Pacific Rail Corporation. It has also been suggested that UP Holdings Company was originally known as "CNW Holdings" (or "CNW Holdings, Inc."). CNW Holdings could be mistaken for the Chicago and North Western Holdings Corporation, the former parent company of the Chicago and North Western. Subsidiary companies in RGI history: Denver and Rio Grande Western Railroad Southern Pacific Transportation Company St. Louis Southwestern Railway Alton and Southern Railway SPCSL Corporation Leavell Development Company Rio Grande Motorways Frontier Village Amusement Park, San Jose CA (1976–1980) SPTC Holding (or SPTC Holding, Inc.) Rio Grande Holding II (or Rio Grande Holding II, Inc.) Arrow Development(1971–1981) References United States railroad holding companies Denver and Rio Grande Western Railroad Railway companies established in 1968 Companies based in Denver 1968 establishments in Colorado