Denison Mines Corp.·Energy

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 Mines' 168.7% surge is powered by the final investment decision on Phoenix, high-grade discoveries and reinforcing its long-term low-cost growth story.

Denison Mines is advancing the Phoenix ISR uranium project, targeting first production by mid-2028 and rapid payback with a ~73% IRR. Phoenix's high-grade, low-cost structure (~$18/lb AISC) and front-loaded extraction underpin strong margins, but project valuation is highly sensitive to uranium prices. DNN trades at a significant premium to Phoenix's NPV, reflecting market optimism for ISR execution, future uranium prices, and portfolio extension potential.

RENO, Nev. , April 09, 2026 (GLOBE NEWSWIRE) -- Equity-Insider. com News Commentary - There is a reason the nuclear sector has generated triple-digit returns over the past year. [1] The world needs clean baseload power. AI data centers are consuming electricity at a rate that solar and wind cannot currently reliably supply.

JPMorgan Chase and Co. purchased a new position in shares of Denison Mine Corp (NYSEAMERICAN:DNN) (TSE: DML) during the third quarter, according to the company in its most recent filing with the Securities and Exchange Commission (SEC). The fund purchased 1,102,594 shares of the basic materials company's stock, valued at approximately $3,032,000. JPMorgan

DNN advances Phoenix ISR uranium mine after approvals, targeting 2028 production and aiming to deliver low-cost supply as global uranium markets tighten.
Denison Mines Corp. engages in the acquisition, exploration, development, extraction, processing, selling of, and investing in uranium properties in Canada. Its flagship project is the 95% interest owned Wheeler River uranium project located in the Athabasca Basin region in northern Saskatchewan. The company was formerly known as International Uranium Corporation and changed its name to Denison Mines Corp. in December 2006. Denison Mines Corp. was founded in 1997 and is headquartered in Toronto, Canada.