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Cosa Reports 5.0 metres of Anomalous Radioactivity up to 13,900 CPS Intersected at Murphy Lake North Joint Venture with Denison Mines

Vancouver, British Columbia--(Newsfile Corp. - March 24, 2026) - Cosa Resources Corp. (TSXV: COSA) (OTCQB: COSAF) (FSE: SSKU) ("Cosa" or the "Company") is pleased to report that the first winter 2026 drill hole at the Company's Murphy Lake North Project ("MLN" or the "Project") has intersected 5.0 metres of anomalous radioactivity. MLN is a joint venture (the "Joint Venture") between Cosa and Denison Mines Corp. (TSX: DML) (NYSE American: DNN) ("Denison") and is located 3 kilometres east of IsoEnergy's Hurricane Deposit in the eastern Athabasca Basin, Saskatchewan (Figure 1).

Cosa Announces Expansions to Orion Project and Joint Ventures with Denison Mines

Vancouver, British Columbia--(Newsfile Corp. - March 3, 2026) - Cosa Resources Corp. (TSXV: COSA) (OTCQB: COSAF) (FSE: SSKU) ("Cosa" or the "Company") is pleased to announce expansions to the Murphy Lake North ("MLN"), Darby ("Darby"), and Orion ("Orion") projects (Figure 1). 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.

Denison Announces Final Investment Decision for the Phoenix In-Situ Recovery Uranium Mine and Plans to Start Construction in March 2026

TORONTO, Feb. 24, 2026 /PRNewswire/ - Denison Mines Corp. ("Denison" or the "Company") (TSX: DML) (NYSE American: DNN) is pleased to announce that its Board of Directors has made a Final Investment Decision ("FID") to proceed with the construction of the Phoenix In-Situ Recovery ("ISR") uranium mine ("Phoenix" or the "Project"), and that site preparation and construction activities for Phoenix are planned to commence in March 2026. PDF Version  David Cates, President and CEO of Denison commented,  "Making a Final Investment Decision and the upcoming initiation of construction activities at Phoenix mark the beginning of a new era in Denison's history and the Canadian uranium mining sector.

Denison Receives Final Regulatory Approval to Construct the Phoenix ISR Uranium Mine

TORONTO, Feb. 19, 2026 /PRNewswire/ - Denison Mines Corp. ("Denison" or the "Company") (TSX: DML) (NYSE American: DNN) is pleased to announce that the Canadian Nuclear Safety Commission ("CNSC") has released the decision of its administrative tribunal (the "Commission") approving the Environmental Assessment ("EA") and issuing the Licence to Prepare Site & Construct a Mine and Mill (the "Licence") for the Wheeler River Uranium Project ("Wheeler River").  With the EA having previously been approved by the Province of Saskatchewan, and other provincial approvals necessary to commence construction already received, federal approval of the EA and the issuance of the Licence represent the final regulatory approvals required to commence construction of the Phoenix In-Situ Recovery ("ISR") uranium mine ("Phoenix" or the "Project").