NexGen Gets Green Light for Major Site Expansion in Saskatchewan to Support New Uranium Discovery

NexGen Energy Ltd.  (TSX:NXE) (NYSE:NXE) (ASX: NXG) ("NexGen" or the "Company") is pleased to announce that the Saskatchewan Ministry of Environment has granted approval for NexGen's 2025 Site Program (the "Program") at its 100%-owned Rook I Property in the Athabasca Basin, Saskatchewan. The Program includes the establishment of a temporary exploration airstrip, expansion of the exploration accommodation camp facilities by 373 beds and site access road improvements.

The Program will commence in the coming weeks and conclude with camp commissioning in Q1 2026. This program builds on NexGen's disciplined, strategic approach to implementing infrastructure enhancements required to support the Company's exploration programs at PCE and that forecast across NexGen's dominant land package in northwestern Saskatchewan into the future.

The drill results of high-grade basement hosted mineralization discovered at PCE 3.5km east from the Arrow deposit indicate another significant scale zone "Arrow style" of mineralization is materializing and warrant these infrastructure enhancements incorporating best practice safety and environmental principles.

Incorporating NexGen's longstanding approach to economic capacity building, the Program will prioritize Local Priority Area participation, generating new employment and contracting opportunities for Indigenous and community members, reflecting NexGen's industry leading and genuine approach to local communities.