Talvivaara Mining Company plc (Finnish: Talvivaaran Kaivososakeyhtiö Oyj, LSE: TALV, OMX: TLV1V) is a Finnish-based nickel mining business operating in Finland.
Listed on the London and Helsinki Stock Exchanges, the company is a constituent of the FTSE 250 and a former member of the OMXH25 index.
The deposits, Kuusilampi and Kolmisoppi, were originally discovered in 1977, by the Geological Survey of Finland (GTK) and Kajaani Corporation (later merged to UPM). Although the deposit was large, it was considered too poor for existing technology. Only bioheap leaching could concentrate the nickel enough, but the technology was still untested. The mining rights were eventually obtained by Outokumpu Corporation, which sold them at a nominal price of one euro to a former employee, Pekka Perä. The Talvivaara Mining Company was established in 2004 when it acquired the rights to mine sites at Sotkamo in Eastern Finland from Outokumpu. In 2006 a metals recovery trial was completed and the necessary financing was secured. Perä proceeded to list the company in London Stock Exchange in 2007 and later to Helsinki Stock Exchange in 2009.