Mr. Leigh Curyer reports

NEXGEN ANNOUNCES 2026 INVESTOR DAY

NexGen Energy Ltd. will host its 2026 investor day as follows.

Date:  Tuesday, Sept. 1, 2026

Time:  8 a.m. Eastern Time/10 p.m. Australian Eastern Standard Time (same day)

The prerecorded virtual event will feature presentations from NexGen's senior leadership and technical team, providing a detailed overview of the construction plan and activities at the company's 100-per-cent-owned Rook I project.

The webcast can be accessed through on-line registration. A link to the webcast will be made available following the event on the company's website.

NexGen's Rook I project is under construction and will be one of the world's most strategic critical minerals projects that will deliver sustainable supply into a structurally undersupplied global uranium market amid growing demand for clean, reliable baseload nuclear energy.

About NexGen Energy Ltd.

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 standards in environmental and social governance. The Rook I project is supported by a National Instrument 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 and 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, B.C., with its primary operations office in Saskatoon, Sask.

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