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Cosa Reports Anomalous Uranium in Sandstone at Darby Joint Venture with Denison Mines

Vancouver, British Columbia--(Newsfile Corp. - May 6, 2026) - Cosa Resources Corp. (TSXV: COSA) (OTCQB: COSAF) (FSE: SSKU) ("Cosa" or the "Company") is pleased to report drilling results for the Company's Darby ("Darby") project. Darby is a joint venture (the "Joint Venture") between Cosa and Denison Mines Corp. ("Denison") (TSX: DML) (NYSE American: DNN) and is located 10 kilometres west of Cameco's Cigar Lake Mine in the eastern Athabasca Basin, Saskatchewan (Figure 1).

Cosa Reports Anomalous Radioactivity in Multiple Drill Holes at the Murphy Lake North Joint Venture with Denison Mines

Vancouver, British Columbia--(Newsfile Corp. - April 13, 2026) - Cosa Resources Corp. (TSXV: COSA) (OTCQB: COSAF) (FSE: SSKU) ("Cosa" or the "Company") is pleased to report the intersection of anomalous radioactivity in multiple drill holes and completion of the winter 2026 drilling program at the Company's Murphy Lake North Project ("MLN" or the "Project"). 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).

Denison Announces Filing of Annual Report on Form 40-F

TORONTO, March 30, 2026 /PRNewswire/ - Denison Mines Corp. ("Denison" or the "Company") (TSX: DML) (NYSE American: DNN) is pleased to announce that it has filed its 2025 Annual Report on Form 40-F with the U.S. Securities and Exchange Commission ("SEC").  Denison's Form 40-F includes its annual information form, management discussion and analysis, and audited financial statements for the year ended December 31, 2025.