The O.T. Mining Corporation, an exploration stage company, explores for and develops base and precious metal resource properties. The company primarily explores for copper, molybdenum, cobalt, zinc, and lead. It holds interests in the Ruby property comprising 13 patented and 291 unpatented claims covering approximately 9.26 square miles located in Jefferson County, Montana. The company was formerly known as Ruby Resources of Montana Inc. and changed its name to The O.T. Mining Corporation in May 1987. The O.T. Mining Corporation was incorporated in 1980 and is based in Helena, Montana.