Canadian Nuclear Safety Commission (“CNSC”) Part 2 Commission Hearing for the Approval of the Rook I Project

Press Release

• Link to the Part 2 Commission Hearing that commenced at 9:00 am CST February 9, 2026: here
• NexGen’s Part 2 presentation video now available on NexGen’s homepage: here
• This Hearing represents the final step in the Federal regulatory process prior to a CNSC approval decision

Vancouver, British Columbia–(- February 9, 2026) – NexGen Energy Ltd. (TSX: NXE) (NYSE: NXE) (ASX: NXG) (“NexGen” or the “Company”) is pleased to be participating this week in Part 2 of the Canadian Nuclear Safety Commission (“CNSC”) Commission Hearing for the Federal approval of the Company’s 100%-owned Rook I Project (the “Project”). The Hearing follows Part 1 that was successfully completed on November 19, 2025. Part 2 proceedings are scheduled from February 9 to 12 and will provide involved parties and members of the public an opportunity to be heard before the Commission to make their views known regarding the advancement of the Project. The four identified and verified potentially impacted Indigenous Nations in the Local Priority Area (“LPA”) are all speaking at the proceedings about the industry leading approach NexGen has taken and the unequivocal support they have for the approval of the Project.

This exciting milestone represents the final step in the Federal regulatory approval process for the Rook I Project. It concludes more than 12 years of disciplined, comprehensive environmental and social studies, and highlights NexGen’s transparent and genuine engagement approach with local and Indigenous communities that has delivered measurable, positive and generational benefits since 2013.

NexGen is presenting a video during the Hearing that showcases the Company’s guiding engagement principles and includes perspectives from Local Priority Area (“LPA”) Indigenous and community leaders. The video also highlights NexGen’s impactful community programs focused on education, training, mentorship, and health and wellness, demonstrating how together with LPA communities, a new standard is being set for responsible resource development-one founded on trust, respect and partnership to deliver enduring social, economic, and environmental benefits for local communities throughout all phases of the mine life, and beyond.

The video can be found on NexGen’s homepage: here

About NexGen

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 environmental and social governance standards. The Rook I Project is supported by an N.I. 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, 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, British Columbia, with its primary operations office in Saskatoon, Saskatchewan.

Contact Information

Leigh Curyer
Chief Executive Officer
NexGen Energy Ltd.
+1 604 428 4112
lcuryer@nxe-energy.ca
www.nexgenenergy.ca

Travis McPherson
Chief Commercial Officer
NexGen Energy Ltd.
+1 604 428 4112
tmcpherson@nxe-energy.ca
www.nexgenenergy.ca

Monica Kras
Vice President, Corporate Development
NexGen Energy Ltd.
+44 7307 191933
mkras@nxe-energy.ca
www.nexgenenergy.ca

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