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• The Canadian Nuclear Safety Commission (“CNSC”) has notified NexGen of successful completion of final Federal technical review.
• This is the key requirement to scheduling a Federal Commission Hearing date and subsequent Federal Project approval decision.
• The Federal Environmental Assessment (“EA”) and License represent the final major approval steps after having received Provincial EA approval in November 2023 .
• In production, the Rook I Project is poised to make NexGen one of the world’s largest and most environmentally conscious mining companies.

NexGen Energy Ltd. (“NexGen” or the “Company”) (TSX: NXE) (NYSE: NXE) (ASX: NXG) is excited and proud to announce a major milestone in the Federal EA process for its 100%owned Rook I Project (“the Project”). The CNSC has provided NexGen formal confirmation that the Company has successfully addressed all information requests received as part of the Federal technical review. With completion of the CNSC technical review, the next and final steps in the Federal approval process include scheduling a Commission Hearing Date for the Project, subject to which the CNSC will render an approval decision on the Project.

This historic milestone marks a crucial step forward for the Project that has been undergoing Canada’s robust and rigorous regulatory process since 2019. Completion of the Federal EA technical review stage follows the CNSC having deemed NexGen’s Federal licence application sufficient in September 2023 , and receipt of Provincial EA approval in November 2023 . This development reinforces Canada’s path to re-establish itself as the leader in global uranium supply and partner of choice.

Leigh Curyer, Chief Executive Officer, commented: “This exciting outcome is a testament to the exceptional efforts of our entire NexGen team, the collaborative support of our valued Indigenous Nation partners, and our transparent approach with the CNSC to ensure a robust and thorough review that meets the highest standards of environmental protection for the sustainable development of the Rook I Project. Since inception, our honest and innovative holistic approach to the successful development of this generational project has set new industry standards as to what is possible, whilst positively impacting all our valued stakeholders.

Together with the Clearwater River Dene Nation, Métis Nation – Saskatchewan Northern Region 2 and Métis Nation – Saskatchewan , Buffalo River Dene Nation, and Birch Narrows Dene Nation, we are construction ready to deliver transformative and unprecedented social, economic and environmental benefits to local communities, the Province of Saskatchewan, Canada , and the world.

We’re not just developing a mine – we’re building strong communities while shaping a sustainable and secure global energy future. With over $800 million in cash and liquid assets, we are ready pending a positive Commission decision with all activities required to immediately commence major…