Vancouver, British Columbia–(Newsfile Corp. – October 2, 2025) – NexGen Energy Ltd. (TSX: NXE) (NYSE: NXE) (ASX: NXG) (“ NexGen ” or the “ Company “) announced today that it is has entered into an amended and restated underwriting agreement with Aitken Mount Capital Partners Pty Ltd (the “ Australian Underwriter “) to upsize its previously announced offering and pursuant to which the Australian Underwriter has agreed to fully underwrite an offering of 45,801,527 common shares in the capital of the Company (the “ Australian Common Shares “), to be settled in the form of Australian CHESS Depositary Interests, at a price of A$13.10 per share (the “ Offering Price “), for gross proceeds of approximately AUD $600 million (the “ Australian Offering” ). In accordance wit

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