Andrew Wong

Brian MacArthur

Katie Lachapelle

Craig Hutchison

Ralph Profiti

George Ross

Alexander Terentiew

Ben Finegold

Gordon Lawson

Graham Yoshio Tanaka

Julio Mondragon

Regan Burrows

Roland Vetter

- NexGen Energy Ltd. announced new **off-scale mineralization** at Patterson Corridor East (PCE) from its summer drill program, with holes RK-25-254 and RK-25-256 intersecting **2.0 m** and **2.1 m** of cumulative **>61,000 counts per second (cps)**, respectively.  **[1698535_0001062993-25-015021_exhibit99-1.htm:0]** 
- These results are considered the **best holes from the summer program to date**, validating growth in high-grade continuity, and RK-25-254's intense high-grade intersection at **454.4 m** depth is among the shallowest ever drilled by NexGen.  **[1698535_0001062993-25-015021_exhibit99-1.htm:0]** 
- As of August 28, 2025, the company has completed **21,968.9 m** of its planned **43,000 m** 2025 drill program.  **[1698535_0001062993-25-015021_exhibit99-1.htm:0]**  Since discovery, **48 of 79 drillholes** at PCE are mineralized, with **14 intersecting off-scale (>61,000 cps)**.  **[1698535_0001062993-25-015021_exhibit99-1.htm:0]**

NexGen Energy Announces New Off-Scale Mineralization at Patterson Corridor East

NexGen Energy (NXE)