NexGen Energy Ltd. Announces Filing of Preliminary Short Form Prospectus

March 10, 2014

NexGen Energy Ltd. (TSX-V: NXE) ("NexGen" or the "Company") is pleased to announce that in connection with the bought deal offering (the "Offering") of 22,300,000 units of NexGen (the "Units") for gross proceeds of $10,035,000, announced on March 4, 2014, it has filed a preliminary short form prospectus with the securities regulatory authorities in each of the provinces of Canada, other than Qu├ębec. Each Unit is being sold for $0.45 (the "Offering Price") and is comprised of one common share of NexGen and one-half of one common share purchase warrant (each whole warrant, a "Warrant"). Each Warrant will entitle its holder to purchase one common share of NexGen at a price of $0.65 for a period of 24 months following the closing of the Offering. It is anticipated that the Offering will close on or about March 26, 2014 (the "Closing Date"). NexGen intends to use the proceeds of the Offering to advance its uranium projects in the Athabasca Basin in Saskatchewan and for working capital and other corporate purposes.

The Offering is being led by Dundee Securities Ltd. ("Dundee") on behalf of a syndicate of underwriters which includes Raymond James Ltd., Cantor Fitzgerald Canada Corporation. and Macquarie Capital Markets Canada Ltd. (collectively with Dundee, the "Underwriters"). The Underwriters have been granted the option to purchase up to an additional 15% of the Offering, exercisable in whole or in part at any time up to 30 days after the closing of the Offering (the "Option"). In connection with the Offering, the Underwriters will receive a cash commission equal to 6.0% of the gross proceeds raised under the Offering (inclusive of the Option) and non-transferable broker warrants equal to 6.0% of the number of Units sold (inclusive of the Option). Each broker warrant shall be exercisable into one Unit of the Company for a period of 24 months from the Closing Date at a price equal to the Offering Price. The Offering is subject to certain conditions including, but not limited to, the receipt of all necessary approvals including the approval of the TSX Venture Exchange and applicable securities regulatory authorities.

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, a 100% interest in Rook 1, immediately adjacent to the north east of Patterson Lake South, and an option to earn a 70% interest in the Radio Project, immediately adjacent to Rio Tinto's Roughrider Deposit.

NexGen Energy Ltd.
Leigh Curyer
Chief Executive Officer
604 428 4112

Kin Communications
604 684 6730 or Toll Free 1 866 684 6730

This news release does not constitute an offer to sell or a solicitation of an offer to buy the securities described herein in the U.S., or in any jurisdiction in which such an offer or sale would be unlawful. The securities described herein have not been and will not be registered under the U.S. Securities Act of 1933, as amended, or any U.S. state securities laws and may not be offered or sold in the U.S. or to the account or benefit of a U.S. person or a person in the U.S. absent registration or an applicable exemption from the registration requirements.

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.

Cautionary Note Regarding Forward-Looking Statements

This press release contains "forward-looking statements" and "forward-looking information" within the meaning of applicable Canadian securities legislation. Forward-looking information includes, but is not limited to, information with respect to completion of the Offering, use of proceeds of the of the Offering, and information with respect to future exploration and development plans concerning the Company's projects in the Athabasca Basin and the potential exercise of the Option by the Underwriters. Generally, forward-looking information can be identified by the use of forward-looking terminology such as "plans", "expects", "estimates", "intends", "anticipates" or "believes" or variations of such words and phrases or state that certain actions, events or results "may", "could", "would", "might", or "will be taken", "occur", or "be achieved". Forward-looking information is based on the reasonable assumptions, estimates, analysis and opinions of management made at the date that such statements are made. Forward-looking information is subject to known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, performance or achievements of the Company to be materially different from those expressed or implied by such forward-looking information, including a need to reallocate the use of proceeds of the Offering due to changes in the exploration and development plans for the Company's uranium projects, or for other prudent business reasons, and the risk factors disclosed elsewhere in the Company's public disclosure. Accordingly, readers should not place undue reliance on forward-looking information. The forward-looking information contained herein is presented for the purposes of assisting investors in understanding the Company's financial and operating performance and the Company's plans and objectives and may not be appropriate for other purposes. The Company does not undertake to update any forward-looking information, except in accordance with applicable securities laws.