NexGen Energy Ltd.: Radio Option Agreement Extension Close

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Feb 26, 2014) - NexGen Energy Ltd. (TSX VENTURE:NXE) ("NexGen" or the "Company") is pleased to announce that further to its news release on January 16, 2014, and pursuant to the letter agreement dated January 15, 2014 (the "Letter Agreement") entered into with Michael Lederhouse, Timothy A. Young and Matthew A. Mason (collectively, the "Optionors"), the Company has issued an aggregate 5,714,286 units (the "Units") to the Optionors, with each Unit comprising one common share in the capital of the Company and one common share purchase warrant with an exercise price of C$0.50 per common share, expiring May 31, 2017. Pursuant to the Letter Agreement, and in consideration for the issuance of the Units, the Optionors have amended the Radio option agreement dated December 5, 2011, as amended (the "the Option Agreement").

Pursuant to the amendment, the amount of remaining earn-in expenditures to be incurred under the Option Agreement will be $10,000,000 and the time period for incurring such expenditures has been extended to May 31, 2017. Previously, all expenditures were required by May 31, 2015.

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 press 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.

Forward-Looking Information

This news release contains "forward-looking information" within the meaning of applicable Canadian securities laws. Generally, but not always, forward looking information is identifiable by the use of words such as "will" and planned" and similar expressions. Forward-looking information is based on the then current expectations, beliefs, assumptions, estimates and forecasts about the Company's business and the industry and markets in which it operates. Such information is not a guarantee of future performance and undue reliance should not be placed on forward-looking information. Assumptions and factors underlying the Company's expectations regarding forward-looking information contained herein include, among others: that general business and economic conditions will not change in a material adverse manner; that financing will be available if and when needed on reasonable terms; that the Company's current exploration activities can be achieved and that its other corporate activities will proceed as expected; that third party contractors, equipment and supplies and governmental and other approvals required to conduct the Company's planned exploration activities will be available on reasonable terms and in a timely manner. Further, mineralization on properties held by third parties adjacent to NexGen's properties (including Patterson Lake South) are not necessarily indicative of mineralization on NexGen's properties.

Although the assumptions made by the Company in providing forward looking information are considered reasonable by management at the time the forward-looking information is given, there can be no assurance that such assumptions will prove to be accurate. Forward-looking information also involves known and unknown risks and uncertainties and other factors, which may cause actual events or results in future periods to differ materially from any projections of future events or results expressed or implied by such forward-looking information, including, among others: risks related to the availability of financing on commercially reasonable terms and the expected use of the proceeds; changes in the market; potential downturns in economic conditions; industry conditions; actual results of exploration activities being different than anticipated; changes in exploration programs based upon results of exploration; future prices of metal; availability of third party contractors; availability of equipment and supplies; failure of equipment to operate as anticipated; accidents, effects of weather and other natural phenomena and other risks associated with the mineral exploration industry; environmental risks; changes in laws and regulations; community relations; and delays in obtaining governmental or other approvals or financing. There can be no assurance that forward-looking information will prove to be accurate, as actual results and future events could differ materially from those anticipated, estimated or intended. NexGen undertakes no obligation to update or reissue forward-looking information as a result of new information or events except as required by applicable securities laws. The reader is cautioned not to place undue reliance on forward-looking information.