The Indianapolis Union Railway Company (reporting mark IU), is a terminal railroad operating in Indianapolis, Indiana. It was organized on May 31, 1850, as the Union Track Railway Company by the presidents of the Madison and Indianapolis Railroad (M&I), the Terre Haute and Richmond Railroad (TH&R), and the Indianapolis and Bellefontaine Railroad (I&B) for the purposes of establishing and operating joint terminal facilities in Indiana's capital city. The name of the company was changed to its present one on August 12, 1853. The next month, on September 20, Indianapolis Union Station opened its doors, becoming the first union railroad station in the world. Since 1999, the company has been owned and operated by CSX.