NexGen Adds a Fifth Drill Rig as Patterson Corridor East High-Grade Zone Expands 17% to 644 Metres

NexGen Energy Ltd. (TSX: NXE, NYSE: NXE), a Canadian uranium exploration and development company, announced on August 25, 2026 that the high-grade subdomain at its Patterson Corridor East (PCE) discovery has expanded by 94 metres, or 17%, to a vertical extent of 644 metres. Two of the strongest holes drilled at PCE since its discovery came from this batch, and NexGen is adding a fifth drill rig to accelerate the remainder of the 2026 program. The exploration update arrives as the company’s flagship Rook I Project advances through major construction, which began in summer 2026 following final federal regulatory approval.

PCE Keeps Growing in a Pattern That Echoes the Arrow Deposit

PCE sits just 3.5 kilometres from NexGen’s flagship Arrow deposit within the Athabasca Basin, the world’s highest-grade uranium district, and the discovery has expanded in every major update since it was first identified in February 2024. The high-grade subdomain’s vertical extent grew to 412 metres in January 2026, then to 550 metres in April (a 33% increase), and now to 644 metres following today’s release, a 17% increase driven specifically by hole RK-26-293, which expanded the vertical extent by 94 metres. Separately, holes RK-26-290c1 and RK-26-294 rank as the best and third-best holes intersected at PCE since discovery, based on cumulative radioactivity above 61,000 counts per second; RK-26-290c1 alone intersected multiple stacked uranium veins across 40 metres of the high-grade subdomain. NexGen has now completed 20,138.7 metres of its planned 42,000-metre 2026 program, with CEO Leigh Curyer noting that the results justified deploying a fifth rig to advance the discovery as efficiently as possible for the remainder of the season.

Exploration Success Runs in Parallel With Rook I’s Move Into Construction

The PCE program is not NexGen’s only major initiative underway. The company received final federal approval for Rook I from the Canadian Nuclear Safety Commission in March 2026, clearing the last regulatory hurdle before full construction, which officially commenced in summer 2026 and is scheduled to take approximately four years. Rook I is designed to produce up to 30 million pounds of uranium annually at full capacity, a volume that would account for more than 20% of current global uranium supply and more than half of Western world output. NexGen has already deployed approximately CAD 748 million toward the project against an estimated total construction capital expenditure of CAD 2.2 billion. Running a major mine construction program and an aggressive satellite exploration campaign simultaneously reflects a company with both the balance sheet and the technical team to advance on multiple fronts at once, though it also means capital allocation across both priorities will be a variable for investors to track.

A Structural Uranium Supply Deficit Frames the Investment Backdrop

NexGen’s exploration and construction progress unfolds against an uranium market that the company and much of the sector describe as structurally undersupplied following a generation of underinvestment. Curyer has repeatedly tied PCE’s expansion directly to that supply narrative, arguing that discoveries of this scale and grade matter more, not less, as reliable uranium supply becomes harder to secure globally. NexGen shares have traded well above their year-ago levels amid that backdrop, and the stock carries a consensus analyst rating of Buy, though shares have also traded meaningfully below consensus price targets at various points this year, reflecting the volatility inherent in a pre-revenue uranium developer moving through its construction phase. No mineral reserves are yet defined at PCE, and the discovery remains supported by exploration results rather than a completed resource estimate, a distinction investors should keep in mind when evaluating the pace of today’s news relative to Rook I’s already-derisked construction milestone.

Strategic Investment Summary

• PCE Expansion: NexGen Energy (TSX: NXE, NYSE: NXE) announced on August 25, 2026 that hole RK-26-293 drove a 17% expansion (94 metres) of the high-grade subdomain at its Patterson Corridor East discovery to a vertical extent of 644 metres, with holes RK-26-290c1 and RK-26-294 separately ranking as the best and third-best holes drilled at PCE since discovery.
• Fifth Drill Rig Added: NexGen is adding a fifth drill rig to accelerate the remainder of its 42,000-metre 2026 exploration program, with 20,138.7 metres completed to date, signaling management conviction in the discovery’s continued growth potential.
• Progressive Growth Pattern: The high-grade subdomain has expanded from 412 metres (January 2026) to 550 metres (April 2026, +33%) to 644 metres (August 2026, +17%), with the mineralized system remaining open at depth.
• Rook I Construction Underway: NexGen’s flagship Rook I Project received final federal approval in March 2026 and entered major construction in summer 2026, targeting up to 30 million pounds of annual uranium production against an estimated CAD 2.2 billion total construction cost.
• Strategic Location: PCE sits 3.5 kilometres from the flagship Arrow deposit within the Athabasca Basin, the world’s highest-grade uranium district, with geological characteristics the company says closely mirror Arrow’s own high-grade profile.
• Key Caveat: No mineral reserves are currently defined at PCE; the discovery remains supported by exploration drilling results rather than a completed resource estimate, distinguishing its stage of development from the already-derisked, construction-stage Rook I Project.

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