Mr. Leigh Curyer reports

NEXGEN RECEIVES CNSC COMMISSION HEARING DATES FOR THE ROOK I PROJECT

The Canadian Nuclear Safety Commission has proposed the commission hearing dates for NexGen Energy Ltd.'s 100-per-cent-owned Rook I project to be conducted on Nov. 19, 2025, and Feb. 9 to Feb. 13, 2026. NexGen commenced the regulatory environmental assessment process for the project six years ago in April, 2019. The company received provincial EA approval in November, 2023, and has since completed the federal technical review and received the acceptance of the federal environmental impact statement as final. Further, all local communities located in the project area have formally endorsed the project through the signing of impact benefit agreements covering the entire life and closure of operations.

The company, together with its indigenous nation partners, whilst pleased the final stage of project approval -- a commission hearing -- has been announced, is considering the implications of the timing with respect to the project.

About NexGen Energy Ltd.

NexGen Energy is a Canadian company focused on delivering clean energy fuel for the future. The company's flagship Rook I project is being optimally developed into the largest low-cost producing uranium mine globally, incorporating the most elite standards in environmental and social governance. The Rook I project is supported by a National Instrument 43-101 compliant feasibility study, which outlines the elite environmental performance and industry leading economics. NexGen is led by a team of experienced uranium and mining industry professionals with expertise across the entire mining life cycle, including exploration, financing, project engineering and construction, operations, and closure. NexGen is leveraging its proven experience to deliver a project that leads the entire mining industry socially, technically and environmentally. The project and prospective portfolio in Northern Saskatchewan will provide generational long-term economic, environmental and social benefits for Saskatchewan, Canada and the world.

NexGen is listed on the Toronto Stock Exchange and the New York Stock Exchange under the ticker symbol NXE and on the Australian Securities Exchange under the ticker symbol NXG, providing access to global investors to participate in NexGen's mission of solving three major global challenges in decarbonization, energy security and access to power. The company is headquartered in Vancouver, B.C., with its primary operations office in Saskatoon, Sask.

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