Copperstone Resources AB (publ) (STO: COPP) is a Swedish exploration company focused on copper, gold, and other base metal deposits in the Nordic region. The company holds and advances mineral projects including the flagship Copperstone copper-gold mine and the nearby Tvistbogarna copper-zinc-silver deposit in the Bergslagen Mining District of central Sweden; the Eva North and Storliden mines in northern Sweden; and the Svartliden gold project. It offers exploration services, resource delineation drilling, and feasibility studies for underground and open-pit mining operations targeting polymetallic ores. Founded in 2016 and headquartered in Stockholm, Sweden, Copperstone Resources operates primarily in Sweden with exploration licenses covering over 200 square kilometers.
In 2024, the company completed a major financing round raising approximately SEK 100 million through a rights issue to fund mine development at Copperstone and Tvistbogarna. It announced a strategic partnership with Nordic Iron Ore for shared infrastructure in the Bergslagen area and acquired additional exploration claims adjacent to its core assets. Recent operational changes include the restart of underground drilling at Copperstone following positive metallurgical test results and submission of environmental permits for production resumption targeted in 2026. These developments position Copperstone for near-term production while expanding its resource base in high-grade copper-gold districts.