• NexGen's Rook I Project receives final regulatory approval from Canadian Nuclear Safety Commission
• Rook I Project will be the largest single source and environmentally elite uranium mine globally
• Construction to commence in summer 2026, with production expected in 4 years

NexGen Energy Ltd. ('NexGen') has announced that the Canadian Nuclear Safety Commission ('CNSC') has approved the company's Environmental Assessment ('EA') and issued a Licence to Prepare Site and Construct for the Rook I Project, its 100%-owned uranium project located in Saskatchewan's Athabasca Basin. This approval marks the final regulatory approval required to initiate full construction of the project. The Rook I Project has been designed to meet NexGen's elite environmental, safety, social and economic standards, working closely with local Indigenous communities and partners. When fully operational, the Rook I Project will be the largest single source and environmentally elite uranium mine globally, incorporating state-of-the-art extraction and safety systems. The project is capable of producing up to 30 million pounds of uranium annually, representing over 20% of the current global uranium fuel supply and over 50% of western world supply. With all approvals now secured, NexGen is set to begin construction of the Rook I Project, advancing long-term economic benefits, skilled jobs, and sustainable growth for the region, as well as strengthening Canada's nuclear energy leadership. The company has already made its Final Investment Decision, with official construction commencing in summer 2026. The construction phase is expected to take 4 years.

As global demand for reliable, clean, baseload nuclear energy continues to accelerate, NexGen's Rook I Project is now ready to be a significant contributor to global requirements for nuclear energy and Canada's role as an energy superpower.