Denison Mines

DNN

Market cap $3.31B

Vancouver, British Columbia--(Newsfile Corp. - January 14, 2026) - Cosa Resources Corp. (TSXV: COSA) (OTCQB: COSAF) (FSE: SSKU) ("Cosa" or the "Company") is pleased to report the promotion of Justin Rodko to Vice President, Corporate Development. Additionally, the Company announces the issuance of common shares to its largest shareholder and joint venture partner Denison Mines Corp. (TSX: DML) (NYSE American: DNN) ("Denison") pursuant to the acquisition agreement between Cosa and Denison dated November 26, 2024 (the "Acquisition Agreement").

TORONTO, Jan. 8, 2026 /PRNewswire/ - Denison Mines Corp. ("Denison" or the "Company") (TSX: DML) (NYSE American: DNN) is pleased to announce that grid power supply from Saskatchewan Power Corporation ("SaskPower") is available at the site of the future Phoenix in-situ recovery uranium mine ("Phoenix", or the "Project") following the recent installation of a new 138kV transmission line. The availability of grid power at the Phoenix site represents a significant step in de-risking the execution of the Project, as the electrification of the site is on the critical path of activities planned for the first year of construction and supports the establishment of the freeze wall planned to surround the initial mining area.

DNN highlighted that its Phoenix ISR uranium project is construction-ready, awaiting final permits in early 2026, with first production targeted for mid-2028.

Denison Mines announced it is almost ready to start construction on its new uranium mine. Regulatory approvals are in process, and production could begin mid-2028.

TORONTO, Jan. 2, 2026 /PRNewswire/ - Denison Mines Corp. ("Denison" or the "Company") (TSX: DML; NYSE American: DNN) is pleased to report that, pending final regulatory approvals, it is ready to make a final investment decision ("FID") and commence construction of the proposed Phoenix In-Situ Recovery ("ISR") uranium mine ("Phoenix" or the "Project").  Significant regulatory, engineering, and construction planning progress has been made throughout 2025, which has positioned Phoenix in a construction-ready state, including confirmation of an expected 2-year construction timeline.

DNN closes an $18M deal with Skyharbour to form four joint ventures at Russell Lake, expanding its presence next to the Wheeler River Project.

Vancouver, British Columbia--(Newsfile Corp. - December 17, 2025) - Cosa Resources Corp. (TSXV: COSA) (OTCQB: COSAF) (FSE: SSKU) ("Cosa" or the "Company") is pleased to report that exploration plans have been approved for the Company's Darby and Murphy Lake North (MLN) projects. Darby and MLN are joint ventures (the "Joint Venture") between Cosa and Denison Mines Corp. ("Denison") (TSX: DML) (NYSE American: DNN) and are located 10 kilometres west of Cameco's Cigar Lake Mine and three kilometres east of IsoEnergy's Hurricane Deposit, respectively, in the eastern Athabasca Basin, Saskatchewan.

TORONTO , Dec. 17, 2025 /PRNewswire/ - Denison Mines Corp. ("Denison" or the "Company") (TSX: DML; NYSE American: DNN) is pleased to announce that it has closed the previously announced transaction (the "Transaction") with Skyharbour Resources Ltd. ("Skyharbour") (TSX-V:SYH) (OTCQX: SYHBF), (Frankfurt:SC1P) and the formation of four joint ventures consisting of claims previously comprising Skyharbour's Russell Lake Uranium Project ("Russell"), which is located directly adjacent to Denison's flagship Wheeler River Project ("Wheeler River").

Vancouver, British Columbia--(Newsfile Corp. - December 4, 2025) - Cosa Resources Corp. (TSXV: COSA) (OTCQB: COSAF) (FSE: SSKU) ("Cosa" or the "Company") is pleased to announce that it has closed the brokered private placement previously announced by the Company on November 13, 2025, as upsized on November 14, 2025, for aggregate gross proceeds to the Company of C$7,500,000.74 (the "Offering"). The Offering was completed through a syndicate of agents, led by Haywood Securities Inc. and including Velocity Capital Partners and CIBC Capital Markets (collectively, the "Agents").

TORONTO , Dec. 4, 2025 /PRNewswire/ - Denison Mines Corp. ("Denison", "DML" or "Company") (TSX: DML, NYSE American: DNN) is pleased to announce the signing of an Impact Benefit Agreement ("IBA") between Denison and the Métis Nation–Saskatchewan ("MN – S"), 13 MN–S Locals, MN-S Northern Region 1 ("MN – S NR-1"), and MN–S Northern Region 3 ("MN – S NR-3") (collectively, the "Métis Parties").  The IBA confirms the Métis Parties' consent to and support for the development and operation of Denison's flagship Wheeler River Project (the "Project") in northern Saskatchewan.