NexGen Energy Ltd. Announces Completion of Share Issuance to Radio Optionors

July 19, 2013

NexGen Energy Ltd.
(TSX.V:NXE) ("NexGen" or the "Company") is pleased to announce that further to its news release on June 26, 2013, and pursuant to the letter agreement entered into with Michael Lederhouse, Timothy A. Young and Matthew J. Mason (collectively, the "Optionors"), it has issued an aggregate of 26,762,088 common shares (the "Shares") and 4,393,938 common share purchase warrants (the "Warrants") to the Optionors, in full and final satisfaction of certain obligations under the Radio option agreement.

The number of Shares issued to the Optionors increased slightly from the 26,761,590 announced on June 26, 2013 to the 26,762,088 referred to above, upon an increase in the Company's fully diluted share capital (thereby affecting the number of shares issuable to the Optionors) due to the grant of options in the ordinary course.

As a result of the Issuance, the Optionors' shareholding on an individual fully diluted basis is approximately 11.22% each.

About NexGen

NexGen is a British Columbia corporation with a focus on the acquisition, exploration and development of Canadian uranium projects. NexGen has a highly experienced team of exploration professionals with a track record in the discovery of unconformity-style uranium deposits in Canada.

NexGen owns a portfolio of highly prospective uranium exploration assets in the Athabasca Basin, Saskatchewan, Canada, including, an option to earn a 70% interest in the Radio Project, immediately adjacent to Rio Tinto's Roughrider Deposit and a 100% interest in Rook 1, immediately adjacent to the north east of Patterson Lake South.

The TSXV has neither approved nor disapproved the contents of this news release. Neither the TSXV nor its Regulation Services Provider (as that term is defined in the policies of the TSXV) accepts responsibility for the adequacy or accuracy of this release.