Mr. Leigh Curyer reports

NEXGEN ANNOUNCES THE APPOINTMENT OF RYAN PODRASKY AS CHIEF FINANCIAL OFFICER

NexGen Energy Ltd. has appointed Ryan Podrasky as chief financial officer (CFO), effective May 25, 2026. Mr. Podrasky succeeds Benjamin Salter, who is stepping down as CFO. Mr. Salter will continue to support the company in an advisory capacity to ensure a seamless transition.

Mr. Podrasky is a CPA-designated finance executive with more than 25 years of leadership across global mining and oil and gas companies. He most recently served as chief financial officer of Elk Valley Resources -- formerly the coal business of Teck Resources and now majority owned by Glencore -- where he led the finance function for a $10-billion-plus revenue business that is the largest steelmaking coal producer in Canada and the second-largest seaborne supplier globally. In that capacity he had oversight of approximately $5-billion in annual operating and capital expenditures across a complex, multisite, fully integrated mine-to-port value chain employing 5,700-plus people and led a comprehensive and strategic finance organization. Mr. Podrasky has served for over five years as board director of Neptune Bulk Terminals (Canada) Ltd., where he chaired the audit, finance and insurance committees.

Prior to being appointed full-time CFO, Mr. Podrasky served as acting CFO during the separation of Teck's coal business into a standalone entity, where he helped lead one of Canada's most complex large-scale corporate carve-outs. He worked closely with the corporate teams in Vancouver establishing the stand-alone capital structure, treasury framework, financial systems and governance model for a multibillion-dollar mining organization.

Before joining Teck, Mr. Podrasky spent over a decade at Nexen Inc. in Calgary, progressing from joint venture auditor through to corporate development, where he supported enterprise strategy, capital projects and joint venture partnerships across large-scale oil sands and international operations. He also held a commercial leadership role at Talisman Energy, where he led a cross-functional team supporting planning, performance management and strategic decision-making across North American operations.

Leigh Curyer, founder and chief executive officer, commented: "It's with great pleasure that we announce Ryan has been appointed chief financial officer of NexGen effective May 25, 2026. Ryan joins NexGen with significant experience on successful large-scale resource projects covering the financing, reporting, budgetary management, and commercial functions during the construction and operating phases. I would like to take the opportunity to acknowledge and thank Ben for his commitment, dedication and positive influence in his role as chief financial officer of NexGen for the past three years. He has overseen the finance function with distinction and has been an absolute pleasure to work alongside in the senior executive team. His contribution to NexGen is and will always be highly regarded.

"The board and executive wish Ben all the very best in his future as he takes some well deserved time off to spend with his family and pursue personal interests."

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, 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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