** Shares of Altitude Minerals ATT.AX rise as much as 15.4% to A$0.045, their highest level since October 2

** Mineral explorer co executes a Definitive Purchase Agreement with Orogen Royalties Inc OGN.V

** Also announces completed due diligence of the Firenze Ag-Au Project in Nevada

** About 1.7 million shares change hands, 1.4 times the 30-day avg

** Stock is up 49% YTD, including the session's moves

(Reporting by Anjali Singh in Bengaluru)

((anjali.singh2@thomsonreuters.com;))