 VANCOUVER, BC, March 16, 2021 PRNewswire - NexGen Energy Ltd. NexGen or the Company TSX: NXE NYSE: NXE is pleased to announce that the Underwriters as defined below have exercised their over-allotment option the Over-Allotment Option, in full, to purchase an additional 5,010,000 common shares in the capital of the Company the Common Shares at a price of 4.50 per Common Share, in connection with the Companys recently completed underwritten public offering of 33,400,000 Common Shares, which closed on March 11, 2021 the Offering. 