Denison Announces Closing of Transaction with Skyharbour and Formation of Four Prospective Exploration Joint Ventures Proximal to Wheeler River
Denison Solidifies Wheeler River Grip as Flagship Project Nears Final Permitting Hurdle
On December 17, 2025, Denison Mines announced the closing of its previously announced transaction with Skyharbour Resources Ltd. This transaction finalizes the formation of four new joint ventures (JVs) covering claims from Skyharbour's Russell Lake Uranium Project, which is strategically located adjacent to Denison's flagship Wheeler River Project.
Denison's interests and roles in the new JVs are as follows: - Wheeler North: 49% interest (Operator) - Wheeler River Inliers: 70% interest (Operator) - Russell Lake: 20% interest (Skyharbour is Operator) - Getty East: 30% interest (Skyharbour is Operator)
The agreement also includes options for Denison to increase its ownership in the Wheeler North and Getty East JVs to a maximum of 70%.
The closing of this transaction is a routine, positive development that executes on the strategy first announced on November 17, 2025. The market has already had time to price in the initial agreement, making the closing a procedural and expected event.
Strategically, the deal is sound. It allows Denison to consolidate a large, prospective land package directly adjacent to its world-class Wheeler River project. This enhances the company's long-term exploration pipeline and provides a protective buffer around its core asset. The total consideration of $18.0 million is modest relative to Denison's cash position (C$471 million as of September 30, 2025) and represents a prudent investment in future growth.
However, this news is not a material catalyst for the stock in the short term. It does not alter the company's immediate operational focus, which remains squarely on the permitting and development of the Phoenix ISR project. The primary drivers of Denison's valuation are tied to the imminent regulatory decisions regarding Wheeler River, not these ancillary exploration JVs. Therefore, the impact is considered routine.
Denison Mines Corp. is a Canadian uranium development and exploration company with a portfolio focused on the Athabasca Basin region of northern Saskatchewan. The company's flagship asset is the 90%-owned Wheeler River project, the largest undeveloped uranium project in the region. Wheeler River hosts two high-grade deposits: 1. Phoenix: One of the highest-grade undeveloped uranium deposits in the world. Denison plans to develop it using the low-cost In-Situ Recovery (ISR) mining method, a first for the Athabasca Basin. The project is in the final stages of the environmental assessment and licensing process. 2. Gryphon: A basement-hosted deposit planned for conventional underground mining.
Denison also holds a strategic 22.5% ownership in the McClean Lake Joint Venture, which includes the operating McClean Lake uranium mill, one of the world's largest uranium processing facilities.