What Do NexGen Energy's (ASX:NXG) Latest Rook I Drill Results Show About the High-Grade Subdomain?

Sonal Goyal

27 October 2026 12:29 AM AEDT

What Do NexGen Energy's (ASX:NXG) Latest Rook I Drill Results Show About the High-Grade Subdomain?

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Key Highlights

NexGen Energy (ASX:NXG) closed at $11.67, up 2.28%, on 26 October 2026.
The high-grade subdomain's vertical extent rose by 94 m, or 17%, to 644 m.
Hole RK-26-290c1 intersected a cumulative 19.5 m of greater than 10,000 cps, and a fifth drill rig is being added.

NexGen Energy (Canada) Ltd (ASX:NXG) closed at $11.67, up 2.28%, in the Trading session on 26 October 2026, while the S&P/ASX 200 closed at 8,809.9, up 0.17%, and the S&P/ASX 200 Energy index gained 0.92%. NexGen is a Vancouver-based uranium developer, also listed on the TSX and NYSE, advancing the Rook I project in Saskatchewan's Athabasca Basin.

Drilling Results Announced on 24 August 2026

NexGen reported results from the early part of its 2026 summer drilling at Patterson Corridor East. Hole RK-26-293 increased the vertical extent of the high-grade subdomain by 94 m, or 17%, to 644 m, intersecting a cumulative 4.7 m of greater than 10,000 counts per second, including 0.1 m of more than 61,000 cps at 930 m depth. The strike extent remains 210 m.

Down-plunge test hole RK-26-290c1 intersected multiple stacked uranium veins across 40 m of the subdomain, with a cumulative 19.5 m above 10,000 cps including 12.9 m surrounding 5.2 m above 61,000 cps. The company said this ranks as the best hole at the zone since discovery on the basis of cumulative intervals above 61,000 cps.

Continuity and Further Drilling

Hole RK-26-294 intersected a cumulative 6.9 m above 10,000 cps including 3.1 m above 61,000 cps, 27 m from RK-24-222, which returned 17.0 m at 3.85% U3O8. RK-26-296 expanded the up-dip high-grade subdomain by 50 m with a cumulative 3.5 m above 10,000 cps. The company is adding a fifth drill rig to continue advancing the zone.

NexGen notes that counts per second are from a handheld radiometric probe and are not a substitute for chemical assays, which are reported separately.

The release explains that the strike extent of the high-grade subdomain remains at 210 m because recent tests focused on confirming deep-seated interpretations, and that the drilling identified repeating, mineralisation-controlling structural disruptions. Holes RK-26-290c1 and RK-26-294 are described as the two best holes of 2026 to date and as the best and third best at Patterson Corridor East since discovery, measured by cumulative intervals above 61,000 cps.

About NexGen

NexGen Energy Ltd. trades on the TSX and NYSE under NXE and on the ASX as NXG. Its Rook I project in Saskatchewan's Athabasca Basin contains the Arrow deposit and the Patterson Corridor East zone discussed in the release.

The announcement lists NexGen's trading venues as the TSX and NYSE under NXE and the ASX under NXG, and is datelined Vancouver, British Columbia, 24 August 2026. It includes tables of drill hole data and figures showing the vertical and plan extents of the subdomain.

Risks and Catalysts on Watch

The reported intervals are probe-based radiometric readings, with assay results to follow. Catalysts named in the release are continued drilling with the added rig and additional results from the summer program.

Wrapping Up

NexGen's results lengthened the high-grade zone vertically to 644 m and added a fifth rig. The shares closed up 2.28% on 26 October.

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