Denison Mines Corp. is a Canadian uranium exploration and development company focused on the Athabasca Basin region of northern Saskatchewan. The company's flagship asset is its 95% interest in the Wheeler River Uranium Project, which is the largest undeveloped uranium project in the eastern portion of the basin and hosts the high-grade Phoenix and Gryphon deposits. Denison is pioneering the use of the In-Situ Recovery (ISR) mining method at the Phoenix deposit to enhance environmental sustainability and cost-efficiency. In addition to Wheeler River, the company holds a 22.5% ownership interest in the McClean Lake joint venture, which includes the McClean Lake uranium mill. Denison also operates a Closed Mines group that manages its Elliot Lake reclamation projects and provides third-party post-closure mine care and maintenance services.