Denison Mines Corp is a Canadian-based uranium exploration and development company engaged in the extraction, processing, and selling of uranium in the Athabasca Basin region of northern Saskatchewan. It also provides complete mine decommissioning services to industry and government through its Denison Environmental Services division. Additionally, the company is the manager of Uranium Participation Corporation, a publicly traded company that invests in uranium oxide and uranium hexafluoride. The majority of Denison's revenue is derived from the mining activities in Canada.