Denison Mines has moved decisively into the construction phase of its Phoenix ISR uranium mine in Canada, as reflected in the company’s financial and operational results for the second quarter of 2026. Since site preparation works began in March at the Athabasca Basin in Saskatchewan, the company has already completed over 20% of total civil works and nearly 100% of the underground work required for the process plant and wellfield areas.
CEO David Cates confirmed that on-site activities are proceeding on schedule. Concrete foundations for the process plant and the main power transformer are being poured, installation of the frozen wall has commenced, and the airstrip has been set up — concrete milestones, not mere statements of intent. Full-scale construction was officially announced in July 2026, following the completion of preparatory works. First production remains on track for mid-2028, with the overall construction timeline spanning approximately two years.
On the financial side, the second quarter delivered a standout result. Denison sold 750,000 pounds of U₃O₈ at an average realized price of CAD 122.16 per pound, generating CAD 91.6 million in gross proceeds. The transaction locked in a gain of approximately CAD 64.1 million over the 2021 acquisition cost — a return of 233%. The strategy had been mapped out years in advance: buy physical uranium when prices were low, then monetize it to fund construction. That plan is now playing out exactly as intended. In addition to the sold inventory, a further 145,926 pounds of uranium concentrate from McClean Lake‘s production entitlement bring total holdings to approximately 1.1 million pounds.
The Wheeler River project, of which Phoenix is a component, is the largest undeveloped uranium deposit in the well-infrastructured eastern Athabasca Basin. Denison holds a 66.9% interest in the asset. Total initial capital for Phoenix is estimated at approximately $600 million, already substantially covered by $345 million in convertible notes raised in August 2025 at a rate of 4.25%, maturing in September 2031. An additional 600,000 pounds of uranium are already committed to fund construction through Q2 2027, with expected proceeds of approximately USD 33.3 million.
Exploration activities have not slowed down. During the first half of 2026, Denison managed campaigns across a portfolio exceeding 450,000 hectares in the Athabasca Basin, spending approximately $10 million on exploration. Positive results were reported across multiple properties. The company remains one of the most active explorers in the region, balancing its investment in the construction site with the ongoing search for new deposits.
If the construction timeline holds, Phoenix will become the first major new uranium mine to open in Canada since Cigar Lake came online. Global uranium demand is rising, driven by the worldwide expansion of nuclear generating capacity. A mine like Phoenix — capable of adding a significant source of supply before the end of the decade — arrives at a moment when producers that can deliver on their schedules are becoming benchmarks for the entire market.
