Millennium — uranium project

Uranium project held indirectly through Denison's 50% ownership of JCU, which holds 30.0990%, giving Denison an effective 15.0495% interest; Cameco is the operator. The estimates are as reported by Cameco as of December 31, 2025; cut-off grades and the assumptions, parameters and methods used are unknown. A qualified person has not done sufficient work to verify or classify these as current mineral resources and Denison is not treating them as such, so they are carried here outside the reserve and resource categories.