NexGen Energy's Rook I Project Advances as Canadian Nuclear Safety Commission Reviews Final Environmental Impact Statement

NexGen Energy Ltd. ("NexGen" or the "Company") (TSX:NXE) (NYSE:NXE) (ASX: NXG) is pleased to announce that on June 21, 2024 the Canadian Nuclear Safety Commission ("CNSC") concluded their 30-day completeness check of NexGen's May 21, 2024 submission of responses to the remaining 49 technical review comments and revised Federal Environmental Impact Statement ("EIS") for NexGen's 100% owned Rook I Project ("Rook I" or the "Project").

The technical review by the CNSC has now commenced through the Federal-Indigenous Review Team, and upon confirmation that all technical review comments have been resolved after its prescribed 60-day review, the CNSC will then be able to deem the EIS final. When the EIS is deemed final, the CNSC will establish the Federal Commission Hearing date.

Leigh Curyer, NexGen's Chief Executive Officer, commented: "The Company continues to successfully advance through the Federal EA process which formally initiated in April 2019. We look forward to the conclusion of the technical review process, for the Federal EIS to be deemed final, and the establishment of a Federal Commission Hearing date for the Rook I Project in order to deliver the significant generational benefits to the local Indigenous Nations, communities, the Province and Canada.

With the acceptance of the Federal licence application and receipt of Provincial EA approval in September and November 2023, respectively – and broad-based support and advocacy from our valued stakeholders and local Indigenous Nation partners and communities – the team is ready to immediately commence major construction of this generational project upon receipt of remaining approvals. The detailed engineering and procurement activities continue along the critical path as do the significant local training programs underway for the future staffing requirements. Rook I represents a crucial clean fuel source that is fully in line with Government of Canada's critical minerals strategy and desire to be a leader in the provision of clean energy solutions including nuclear power and NexGen will be instrumental in global efforts to bring diversified, reliable, carbon-free energy to the world."