NexGen Energy Ltd. announced the commencement of a 30,000-meter exploration drill program that will test priority targets on NexGen's 100% owned properties that dominate the boundary of the proven high-grade uranium district of the southwest Athabasca Basin. The Company's 2024 program builds on 2023 exploration results, which advanced the geological investigation of previously unexplored corridors and produced priority targets for this 2024 campaign. NexGen's 2023 exploration program applied high-resolution geophysical surveys across all properties, and 22,114.4 meters of drilling dedicated to SW 2 (Rook I) (Figure 1) and SW1 (Gambit, Gartner and King) (Figure 2).

The results yielded a more comprehensive understanding of the geology in the highly prospective R7 and Morrow targets on the SW2 property; including brittle-reactivated structure and hydrothermal alteration indicative of high-grade uranium-bearing systems. Further, the 2023 program identified high prospectivity in the SW1 property (Gartner and Gambit corridors) where hydrothermal alteration associated with structure was discovered. In 2024, NexGen is increasing its exploration effort with a 30,000-meter drill program to follow up on these results and continue to systematically test the large and prospective land package NexGen holds. By refining targets through purpose-built geophysical coverage and drill testing priority areas, this exploration program is designed to strategically capitalize on the increasing global demand for clean, sustainably produced Canadian uranium.

This drill program ? targeting ten (10) conductive trends ? has a planned total of 30,000 meters with up to four (4) drill rigs in operation ?

15,700 meters planned for SW2 (Rook I), and 14,300 meters planned for SW1. Winter drilling will take place on prospective corridors in proximity to the Arrow deposit: Patterson Corridor East, Derksen West, Derksen, Derksen East, and Fury. During summer drilling, NexGen will target prospective corridors Gartner, Gambit, King on SW1 and Fury, R7, Morrow on SW2.

NexGen's cash reserves are approximately C$410 million available to fund the continuing development and further exploration of the Company's mineral properties, and for general corporate purposes.