Investors

Denison Mines – JV Partner at Russell Lake and Large Strategic Shareholder of Skyharbour and Denison’s President and CEO, David Cates, is a Director of the Company

Denison Mines (TSX: DML; NYSE American: DNN)  is a uranium exploration and development company with interests focused in the Athabasca Basin region of northern Saskatchewan, Canada. The Company has an effective 95% interest in its flagship Wheeler River Uranium Project, which is the largest undeveloped uranium project in the infrastructure rich eastern portion of the Athabasca Basin region of northern Saskatchewan. In mid-2023, a Feasibility Study was completed for Wheeler River's Phoenix deposit as an ISR mining operation, and an update to the previously prepared PFS was completed for Wheeler River's Gryphon deposit as a conventional underground mining operation. Based on the respective studies, both deposits have the potential to be competitive with the lowest cost uranium mining operations in the world. Permitting efforts for the planned Phoenix ISR operation commenced in 2019 and have advanced significantly, with licensing in progress and a draft Environmental Impact Statement submitted for regulatory and public review in October 2022.

Denison's interests in Saskatchewan also include a 22.5% ownership interest in the McClean Lake Joint Venture, which owns several uranium deposits and the McClean Lake uranium mill, contracted to process the ore from the Cigar Lake mine under a toll milling agreement, plus a 25.17% interest in the Midwest Main and Midwest A deposits and a 67.41% interest in the THT and Huskie deposits on the Waterbury Lake property. The Midwest Main, Midwest A, THT and Huskie deposits are located within 20 kilometres of the McClean Lake mill. Through its 50% ownership of JCU (Canada) Exploration Company, Ltd ('JCU'), Denison holds additional interests in various uranium project joint ventures in Canada, including the Millennium project (JCU, 30.099%), the Kiggavik project (JCU, 33.8118%) and Christie Lake (JCU, 34.4508%). Denison's exploration portfolio includes further interests in properties covering approximately 285,000 hectares in the Athabasca Basin region.

Website: https://denisonmines.com/

Rio Tinto Limited - Large Strategic Shareholder of Skyharbour

Rio Tinto (ASX: RIO) is one of the largest mining and metals companies globally, operating in 35 countries with over 49,000 employees. Rio Tinto’s purpose is to produce materials essential to human progress.

Website: https://www.riotinto.com/

Orano Canada – JV Partner at the Preston Project with Orano as Operator with 53.4%

Headquartered in Saskatoon, Saskatchewan, Orano Canada Inc. is a leading producer of uranium, accounting for the processing of 16.9 million pounds of uranium concentrate in Canada in 2024. Orano has been exploring for, mining and milling uranium in Canada for more than 60 years. Orano Canada is the operator of the McClean Lake uranium mill and a major partner in the Cigar Lake, McArthur River and Key Lake operations. The company employs over 450 people in Saskatchewan, including about 375 at the McClean Lake operation where over 40% of employees are self-declared Indigenous. As a sustainable uranium producer, Orano Canada is committed to safety, environmental protection and contributing to the prosperity and well-being of neighbouring communities.

Orano Canada Inc. is a subsidiary of the multinational Orano group. As a recognized international operator in the field of nuclear materials, Orano delivers solutions to address present and future global energy and health challenges. Its expertise and mastery of cutting-edge technologies enable Orano to offer its customers high value-added products and services throughout the entire fuel cycle. Every day, the Orano group’s 17,000 employees draw on their skills, unwavering dedication to safety and constant quest for innovation, with the commitment to develop know-how in the transformation and control of nuclear materials, for the climate and for a healthy and resource-efficient world, now and tomorrow.

Website: https://www.orano.group/canada/en

Option and JV Partners

Orano Canada – 53.4% JV partner at the Preston Project (Skyharbour owns 25.6%)

Russell Lake - Russell Lake has been restructured into four joint ventures with Denison Mines—RL, Getty East, Wheeler North, and the Wheeler River Inlier claims—with Skyharbour retaining majority positions at RL and Getty East, while Denison can earn up to 70% at Wheeler North and Getty East through staged earn-in agreements

Azincourt Energy Corp. – 85.8% JV partner at the East Preston Project (Skyharbour owns 9.5%)

Thunderbird Resources Limited (previously Valor) – 80%  JV partner at the Hook Lake Project (Skyharbour owns 20%)

Nexus Uranium Corp. – Earn-in option partner up to 75% at the Mann Lake Project

Terra Clean Energy (previously Tisdale) – Earn-in option partner up to 75% at the South Falcon East Project

North Shore Uranium Ltd. – Earn-in option partner up to 100% at the Falcon Project

UraEx Resources – Earn-in option partner up to 100% at the South Dufferin and Bolt Projects

Hatchet Uranium Corp. – Earn-in option partner up to 80% at the Highway Project

Mustang Energy Corp. – Earn-in option partner up to 75% at the 914W Project