TORONTO, March 20, 2026, 12:47 EDT
Denison Mines shares slipped on both sides of the border Friday: U.S. ADRs changed hands at $3.39, retreating from $3.52 the prior session, and Toronto shares shed 4.1% by 11:21 a.m. EDT. The move followed the board’s green light for building the Phoenix uranium mine in Saskatchewan, a decision made less than a month ago.
The clock is ticking. On March 10, Denison announced that site prep and construction work at Phoenix would kick off this month, aiming for initial output by mid-2028. The conversation now shifts—permits and board signoff are in the rearview, with execution and keeping costs in check taking center stage.
Phoenix plans to rely on in-situ recovery—ISR for short—drawing uranium up via wells, skipping the need for traditional open-pit or underground excavation. Denison said federal regulators signed off in February, marking Phoenix as the first uranium mine in Canada to receive construction clearance in over two decades. Wheeler River, meanwhile, holds onto its title as the largest undeveloped uranium site in the eastern Athabasca Basin.
Denison chief executive David Cates says the company is “ready to commence site preparation for and construction of the Phoenix ISR uranium mine later this month.” He adds that Phoenix could emerge as “one of the few new sizeable sources of uranium production expected to come to the market before the end of the decade.” Denison Mines Corp.
Selling pressure extended beyond Denison. By the end of Thursday’s U.S. trading, Denison wrapped up at $3.52. Cameco dropped 2.8%, NexGen Energy shed 3.15%, and uranium prices edged down 0.99% on March 19, settling at $84.65 a pound.
The peer landscape is relevant; Denison remains largely in the development phase. According to Reuters company data, Denison owns 95% of Wheeler River and 22.5% in the McClean Lake joint venture. That mill handles ore from Cameco’s Cigar Lake mine, thanks to a toll-milling agreement.
The build-out isn’t without hazards. Denison reported 2025 revenue at $4.918 million, per Reuters financials, but ended the year with a $217.288 million net loss and $614.44 million in total debt. Management says the US$345 million convertible-notes issue is earmarked to back Phoenix.
The bet on Phoenix hinges on hitting that mid-2028 production target, with the project still positioned as one of the scarce large-scale uranium additions before the decade closes. But unless construction gets visibly underway, the stock could keep moving in step with uranium prices and whatever execution news breaks.
