NATURE OF OPERATIONS	12 Months Ended
Dec. 31, 2018
Nature Of Operations
NATURE OF OPERATIONS	Denison Mines Corp. (“DMC”) and its subsidiary companies and joint arrangements (collectively, “Denison” or the “Company”) are engaged in uranium mining related activities, which can include acquisition, exploration and development of uranium properties, extraction, processing and selling of uranium. The Company has a 90.0% interest in the Wheeler River Joint Venture (“WRJV”), a 65.92% interest in the Waterbury Lake Uranium Limited Partnership (“WLULP”), a 22.5% interest in the McClean Lake Joint Venture (“MLJV”) (which includes the McClean Lake mill) and a 25.17% interest in the Midwest Joint Venture (“MWJV”), each of which are located in the eastern portion of the Athabasca Basin region in northern Saskatchewan, Canada. The McClean Lake mill provides toll milling services to the Cigar Lake Joint Venture (“CLJV”) under the terms of a toll milling agreement between the parties (see note 14). In addition, the Company has varying ownership interests in a number of other development and exploration projects located in Canada. The Company provides mine decommissioning and environmental consulting services (collectively “environmental services”) to third parties through its Denison Environmental Services (“DES”) division and is also the manager of Uranium Participation Corporation (“UPC”), a publicly-listed investment holding company formed to invest substantially all of its assets in uranium oxide concentrates (“U₃O₈“) and uranium hexafluoride (“UF₆”). The Company has no ownership interest in UPC but receives fees for management services and commissions from the purchase and sale of U₃O₈and UF₆ by UPC. DMC is incorporated under the Business Corporations Act (Ontario) and domiciled in Canada. The address of its registered head office is 40 University Avenue, Suite 1100, Toronto, Ontario, Canada, M5J 1T1. References to “2018” and “2017” refer to the year ended December 31, 2018 and the year ended December 31, 2017 respectively.

NATURE OF OPERATIONS

12 Months Ended

Dec. 31, 2018

Denison Mines Corp. (“DMC”) and its subsidiary companies and joint arrangements (collectively, “Denison” or the “Company”) are engaged in uranium mining related activities, which can include acquisition, exploration and development of uranium properties, extraction, processing and selling of uranium.

The Company has a 90.0% interest in the Wheeler River Joint Venture (“WRJV”), a 65.92% interest in the Waterbury Lake Uranium Limited Partnership (“WLULP”), a 22.5% interest in the McClean Lake Joint Venture (“MLJV”) (which includes the McClean Lake mill) and a 25.17% interest in the Midwest Joint Venture (“MWJV”), each of which are located in the eastern portion of the Athabasca Basin region in northern Saskatchewan, Canada. The McClean Lake mill provides toll milling services to the Cigar Lake Joint Venture (“CLJV”) under the terms of a toll milling agreement between the parties (see note 14). In addition, the Company has varying ownership interests in a number of other development and exploration projects located in Canada.

The Company provides mine decommissioning and environmental consulting services (collectively “environmental services”) to third parties through its Denison Environmental Services (“DES”) division and is also the manager of Uranium Participation Corporation (“UPC”), a publicly-listed investment holding company formed to invest substantially all of its assets in uranium oxide concentrates (“U₃O₈“) and uranium hexafluoride (“UF₆”). The Company has no ownership interest in UPC but receives fees for management services and commissions from the purchase and sale of U₃O₈and UF₆ by UPC.

DMC is incorporated under the Business Corporations Act (Ontario) and domiciled in Canada. The address of its registered head office is 40 University Avenue, Suite 1100, Toronto, Ontario, Canada, M5J 1T1.

References to “2018” and “2017” refer to the year ended December 31, 2018 and the year ended December 31, 2017 respectively.