NexGen Energy (NXE.TO) on Monday said it has achieved its "best hole drilled to date" that has materially expanded the shallow inner high-grade subdomain at Patterson Corridor East at the Rook I Property in Saskatchewan.

The drill hole intersected 3.9 meters of >61,000 cps, indicating rich uranium concentration within a larger 13.8-meter mineralized interval that starts at 452.2 meters. Four additional winter drill holes all located a minimum 50 meters from the above drill hole have all encountered high-grade intercepts containing >61,000 cps, expanding the high-grade subdomain to 210 meters along strike and 355 meters of vertical extent. This was double the size last reported in November 2024.

"This intercept from RK-25-232 is geologically exceptional and represents a transformational moment taking PCE into a category to rival [the Arrow deposit] at the same stage of drilling," said NexGen Chief Executive Leigh Curyer. "NexGen, Saskatchewan and our community partners are ready to immediately commence construction of the Rook I Project subject to the completion of the CNSC approval process."

NexGen's share price at last look gained 2% to US$5.02 in U.S. pre-market trading on Monday.