Patterson Corridor East (PCE)

New uranium discovery on the 100%-owned Rook I property, located 3.5 km east of the Arrow Deposit on a previously untested conductor segment of Patterson Corridor East, announced March 11, 2024 (drill hole RK-24-183). 2024 drilling intersected mineralization in multiple holes, several with off-scale (>61,000 cps) radiometric readings; assays from RK-24-183 included 10% U3O8 over 0.5 m and 6.23% U3O8 over 0.5 m, and RK-24-193 intersected mineralization over 67.5 m. Results indicate a steeply dipping, basement-hosted vein-type mineralized footprint of 600 m along strike with 600 m of depth extent, characteristically similar to Arrow, including a loosely defined high-grade sub-domain spanning 100 m of strike and 170 m of depth. The 2025 program of 43,000 m (35,366.2 m completed) expanded the interpreted limits of mineralization relative to end-2024. In 2025 NexGen acquired Rio Tinto Exploration Canada's 10% production carried interest over 39 claims including those hosting PCE, bringing ownership to 100%. No mineral resource estimate has been disclosed.