Mr. Leigh Curyer reports

NEXGEN TO HOST 2023 SECOND QUARTER RESULTS AND CONFERENCE CALL

NexGen Energy Ltd. has released its second quarter 2023 financial statements and management discussion and analysis before market open on Wednesday, Aug. 9, 2023.

NexGen will host its 2023 Second Quarter Conference Call on Thursday, August 10, 2023 at 11:00am Eastern Standard Time, where Chief Executive Officer, Leigh Curyer, and Chief Commercial Officer, Travis McPherson, along with NexGen's Vice President, Finance, Ben Salter, will provide a status update on the advancement of the Rook I Project as well as the uranium market dynamics. Following official remarks, the Company will host a question-and-answer period.

Conference call details:

Date: Thursday, August 10, 2023

Time: 11:00am Eastern Standard Time

North America Toll Free:

1-888-664-6392

Rapid Connect:

https://emportal.ink/44RwBNd

A replay will be available on the NexGen website under Events & Presentations. Further information is available at www.nexgenenergy.ca About NexGen

NexGen Energy is a Canadian company focused on delivering clean energy fuel for the future.The Company's flagship Rook I Projectis 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 issupported by a NI 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 andconstruction, 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.

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