IsoEnergy Completes Summer Drilling at Larocque East, Intersecting Widespread and Strongest Radioactivity to Date Along the Hurricane South Trend

IsoEnergy Completes Summer Drilling at Larocque East, Intersecting Widespread and Strongest Radioactivity to Date Along the Hurricane South Trend

PR Newswire

TORONTO , September 8, 2026 /PRNewswire/ -- IsoEnergy Ltd. ("IsoEnergy", or the "Company") (NYSE American: ISOU); (TSX: ISO) is pleased to report on radioactive zones intersected in summer drilling along the Hurricane South Trend on the Larocque East project (the " Project "), which hosts the high-grade Hurricane deposit (" Hurricane " or the " Deposit "). Summer drilling at Larocque East totaled 10,159 m in 26 holes, for a year-to-date total of 16,963 m in 43 drill holes (Figure 1). The summer program was expanded from a planned 8,000 m, 20-hole program to follow up on encouraging winter and early summer results ( see news release dated July 8, 2026 ). Highlights of drill core radiometric results and uranium geochemistry from the winter holes were reported on April 7, 2026 and May 12, 2026 , respectively. All samples from the summer program have been submitted to SRC Geoanalytical Laboratories and results will be reported when available.

Hurricane hosts a current Mineral Resource of 48.6 Mlb U 3 O 8 at 34.5% U 3 O 8 Indicated, and 2.7 Mlb U 3 O 8 at 2.2% U 3 O 8 Inferred (see "Qualified Person Statement" below). The Project benefits from excellent infrastructure, located approximately 40 km northwest of the McClean Lake mill, and features relatively shallow mineralization at approximately 325 m depth, supporting efficient exploration and future development optionality. The Deposit is located on the Larocque Trend, an important regional structure that also hosts other notable high-grade occurrences including those on Cameco and Orano's Dawn Lake joint venture.

Highlights

The summer drill program successfully intersected widespread, strongly el