NexGen Energy has reported a 23% increase in the vertical extent of the high-grade subdomain at Patterson Corridor East (PCE), growing from 335 m to 412 m with a strike length of 210 m. The overall mineralized footprint has also expanded to 700 m vertical extent (up from 600 m) and 620 m strike length (up from 600 m). An emerging secondary high-grade subdomain has been identified at 850 m below surface, extending the known high-grade zone and indicating further potential at depth. These results are based on the concluding holes of the 2025 PCE program, which totaled 35,366.2 m of drilling—the largest program in the Athabasca Basin last year.

NexGen has commenced its largest-ever follow-up drilling campaign at PCE, allocating 42,000 m of diamond drilling to focus on high-grade growth and continued expansion of the mineralized footprint. The program includes at least eight step-out tests at 200 m spacing to search for repetitions of basement-hosted mineralization approximately 600 m southeast of the existing discovery. In parallel, NexGen will conduct inaugural regional drilling of 3,500 m on its 100%-owned SW3 property to advance high-priority greenfield targets identified by recent geophysical surveys.

Drill hole RK-25-256 at PCE returned NexGen’s highest-grade intercept to date: 5.5 m at 21.4% U3O8, including 2.5 m at 46.1% and a 0.5 m segment grading 74.8% U3O8. This ultra-high-grade intersection lies 119 m down-dip of a previous off-scale intercept and further extends high-grade continuity along a minimum 215 m dip extent. According to management, these results place PCE in a rare mineralization category globally and mirror the characteristics of the nearby Arrow deposit 3.5 km to the west.