Legal Notice

Please read the following terms and conditions of use (the "Terms of Use") carefully before using the www.nexgenenergy.ca website (the "Site"). By using or accessing the Site, you acknowledge that you have read the Terms of Use and that you accept and will be bound by the Terms of Use. If you do not agree with anything contained in the Terms of Use, do not use the Site.

The Terms of Use may be amended from time to time without notice. Accordingly, you should periodically revisit the Site to review the then-current Terms of Use governing your use of the Site and determine whether you wish to continue accessing the Site.

References to the "Company" in the Terms of Use include NexGen Energy Ltd. and all of its subsidiaries, affiliates and related companies.

Proprietary Rights
The Site, its organization and design, and all information, images, artwork, text, video, audio, pictures, and other materials on the Site as well as the layout and design of the Site (collectively the "Content") may be protected by copyright and/or other proprietary rights, all of which are owned by the Company. You may download information from the Site for your non-commercial, personal viewing, but you may not, directly or indirectly, otherwise copy, reproduce, republish, post, transmit, display, frame in another web page, perform, distribute, modify or create derivative works from the Content without the Company's prior written approval. You do not acquire ownership rights to any Content by accessing or using the Site, and the Company's posting of Content on the site does not constitute a waiver of any right in or to such Content.

The Company may change any part of the Site including without limitation, any part or the whole of the Content at any time and without notice or liability. The Company may correct any errors or omissions in any portion of the Site without notice or liability but does not have a duty to do so at any time, and in its sole and unfettered discretion.

The Company owns "NEXGEN", the Company's logo, and all other Company trade-marks and trade names appearing on the Site. Unless otherwise indicated, all other trade-marks appearing on the Site are owned by third parties.

Disclaimers
This Site and its Content are provided "as is" and "as available". The Content is believed to be accurate at the time it is posted on the Site. However, the Content may not be accurate, complete or current. To the fullest extent permissible under applicable law, the Company disclaims all representation and warranties, whether express, implied or statutory (including without limitation any warranties of merchantability, fitness for a particular purpose, accuracy and non-infringement). The Company does not represent or warrant that functions contained in the Site will be uninterrupted or error-free, that defects will be corrected, or that the Site or the server that makes it available is free of viruses or other harmful components.

The information and Content contained on the Site is prepared by the Company and is believed to be accurate, but has not been independently audited or verified and is provided for informational purposes only. This information and Content is not to be construed as an offer nor as a recommendation to buy or sell securities in any jurisdiction. The Company does not warrant or make any representations regarding the use or the results of the use of any Content in terms of completeness, correctness, accuracy, reliability, usefulness, timeliness, reliability or otherwise. The information and other Content on the Site is not meant to modify, qualify, supplement or amend information disclosed by or on behalf of the Company under corporate, securities or other legislation in any jurisdiction, and should not be used to make investment decisions involving the Company's securities.

You acknowledge that your access to and use of the Site and the Content will not be free of interruptions, that the Site and the Content may contain bugs, errors, inaccuracies or other limitations, and that the Site may be unavailable from time to time. You assume total responsibility and risk for your access to and use of the Site and the Content.

Limitation of Liability
The Company and its officers, directors, employees and representatives will not be liable to you or any other party for any claims, expenses, or damages of any kind including, without limitation, damages based on contract, negligence or other legal basis, including without limitation, indirect, special, consequential or incidental damages, lost profits, opportunities, business interruption or other damages arising directly or indirectly from your use of the Site or the Content, including without limitation, your use or reliance on any information or other Content contained on the Site; any delay or loss of use or access to the Site; any inaccuracy or omission in any information or other Content contained on the Site or failure to keep the information or Content current; your use of or reliance on any third-party websites linked to the Site; any Internet software used in connection with this website or computer viruses or other destructive programs encountered as a result of using this website; and any other matter connected with this website. These limitations apply even if the party liable or allegedly liable had been advised of the possibility of such claim, damage or loss or if such damage or loss was foreseeable by the party liable or allegedly liable.

You acknowledge that the Company is making the Site and the Content available to you in reliance upon your acceptance of the limitations and exclusions of liability and the disclaimers set out in this Legal Notice and that the same form a contract between you and the Company. You agree that the limitations and disclaimers will survive and continue to apply in the case of a fundamental breach or breaches, the failure of an essential purpose of this contract, the failure of any remedy or the termination or suspension of your use of the Site by the Company.

No Incorporation by Reference
No information included herein shall be deemed to be incorporated by reference into any of the Company's regulatory filings, unless expressly indicated in any such filings. In addition, no information shall be incorporated by reference into this website, unless otherwise specified.

Indemnity
You agree to indemnify, defend and hold harmless the Company and its affiliates and their respective officers, directors, employees and representatives from and against all losses, expenses, damages and costs (including actual lawyers' fees and expenses) arising directly or indirectly from your violation of these Terms of Use or from your use of the Site.

Forward-Looking Information
The Site and the Content contains "forward-looking information" within the meaning of applicable Canadian securities legislation. "Forward-looking information" includes, but is not limited to, statements with respect to the activities, events or developments that the Company expects or anticipates will or may occur in the future, including, without limitation, the anticipated timing for an updated mineral resource based on 2016 drilling, growth potential and planned exploration activities. Generally, but not always, forward-looking information and statements can be identified by the use of words such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates", or "believes" or the negative connotation thereof 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" or the negative connation thereof.

Such forward-looking information and statements are based on numerous assumptions, including among others, that the results of planned exploration activities are as anticipated, the price of uranium, the anticipated cost of planned exploration activities, that general business and economic conditions will not change in a material adverse manner, that financing will be available if and when needed and on reasonable terms, and 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. Although the assumptions made by the Company in providing forward-looking information or making forward-looking statements are considered reasonable by management at the time, there can be no assurance that such assumptions will prove to be accurate.

Forward-looking information and statements also involve 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 or statements, including, among others: negative operating cash flow and dependence on third party financing, uncertainty of additional financing, uncertainty of mineral resource estimation, pending assay results may not be consistent with preliminary results, discretion in the use of proceeds, alternative sources of energy, aboriginal title and consultation issues, reliance on key management and other personnel, potential downturns in economic conditions, actual results of exploration activities being different than anticipated, changes in exploration programs based upon results, 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.

Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in the forward-looking information or implied by forward-looking information, there may be other factors that cause results not to be as anticipated, estimated or intended. There can be no assurance that forward-looking information and statements will prove to be accurate, as actual results and future events could differ materially from those anticipated, estimated or intended. Accordingly, readers should not place undue reliance on forward-looking statements or information. The Company 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.

Cautionary Note to US Investors
Information concerning the properties and operations discussed in the Site has been prepared in accordance with Canadian standards under applicable Canadian securities laws, and may not be comparable to similar information for United States companies. The terms "Mineral Resource", "Measured Mineral Resource", "Indicated Mineral Resource" and "Inferred Mineral Resource" used in the Site are Canadian mining terms as defined in accordance with NI 43-101 under guidelines set out in the Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") Standards on Mineral Resources and Mineral Reserves. While the terms "Mineral Resource", "Measured Mineral Resource", "Indicated Mineral Resource" and "Inferred Mineral Resource" are recognized and required by Canadian regulations, they are not defined terms under standards of the United States Securities and Exchange Commission (the "SEC"). Under United States standards, mineralization may not be classified as a "reserve" unless the determination has been made that the mineralization could be economically and legally produced or extracted at the time the reserve calculation is made. As such, certain information contained in the Company's publications and the Content concerning descriptions of mineralization and resources under Canadian standards is not comparable to similar information made public by United States companies subject to the reporting and disclosure requirements of the SEC. The Company may use certain terms in its publications or in the Content such as "resources" that SEC guidelines strictly prohibit U.S. companies from including in filings with the SEC. An "Inferred Mineral Resource" has a great amount of uncertainty as to its existence and as to its economic and legal feasibility. It cannot be assumed that all or any part of an "Inferred Mineral Resource" will ever be upgraded to a higher category. Under Canadian rules, estimates of Inferred Mineral Resources may not form the basis of feasibility or other economic studies. Readers are cautioned not to assume that all or any part of Measured or Indicated Resources will ever be converted into Mineral Reserves. Readers are also cautioned not to assume that all or any part of an "Inferred Mineral Resource" exists, or is economically or legally mineable. In addition, the definitions of "Proven Mineral Reserves" and "Probable Mineral Reserves" under CIM standards differ in certain respects from the standards of the SEC. In addition, the Company's publications and the Content may include information about adjacent properties on which the Company has no right to explore or mine. The Company advises U.S. investors that the SEC's mining guidelines strictly prohibit information of this type in documents filed by U.S. companies with the SEC. U.S. investors are cautioned that mineral deposits on adjacent properties are not indicative of mineral deposits on the Company's properties.

Stock Quotes
All stock price quotes and historical stock price data on the site are provided by third parties, are for informational purposes only, and are not intended for trading purposes. If you are contemplating trading in the Company's securities, the Company strongly advises that you obtain independent professional advice (including independent legal and financial advice from qualified advisors) before making any investment decision. The Company makes no representation or warranty regarding the timeliness, accuracy or completeness of any stock price quotes or historical stock price data and has not taken any steps to verify the adequacy, timeliness, accuracy or completeness of the information on the Site.

Security and Viruses
E-mail communications between you and the Company may not be secure. We suggest that you encrypt all e-mail to increase the security of your communications with the Company.

The Company has taken precautions to ensure that the Site is free of computer viruses. Nevertheless, you should install and maintain appropriate anti-virus and other protective software. Without limiting any other wording in these Terms of Use, the Company disclaims any and all liability for any computer viruses or other harmful or destructive programs that you may download from the Site.

Privacy
The Company does not collect any personal information about visitors to this Site other than that which is specifically and knowingly provided by you. That personal information will not be transferred to any third party unless otherwise stated at the time of collection. The Company respects your personal privacy. You may use the Site without providing any personal information about yourself other than such personal information as you may specifically and knowingly provide. You can choose not to provide certain requested personal information, but then you may not be able to use certain services provided by NexGen that are based on the use of this information or access or use certain features of the Site that require this the use of this information to function. NexGen uses the personal information you voluntarily provide for the following purposes and as otherwise permitted by applicable law: (a) to respond to specific requests from you; and/or (b) to contact and correspond with you regarding your inquiries to NexGen.

Linking
The Site may contain links to third party websites or content posted on the websites maintained by third parties. The Company provides such links for your convenience only, to assist you in identifying and locating other Internet resources that may be of interest to you.

You acknowledge that in providing such links the Company: does not endorse any third party website or content contained on such website; does not act as an editor, publisher or disseminator of any content accessible through such links and neither controls nor monitors such content; does not make any representations or warranties of any kind regarding the links or the third party websites; is not responsible in any way for the accuracy, relevancy, completeness, timeliness or legality of any content accessible through such links; and is not responsible in any way for any damage or loss incurred as a result of your use of or reliance on any of the links.

If you wish to provide a link to the Site from your website, you may only link to the Company's home page at www.nexgenenergy.ca. You may not use any of the Company's icons or logos on your website without the Company's express written consent, and you may not use the link to suggest that the Company sponsors, endorses, approves of, or is affiliated with, you or your website. Further, at any time and on reasonable notice, the Company may direct that you remove the link to the Site from your website. If you refuse or neglect to remove the link to the Site from your website you acknowledge that such refusal or neglect will result in immediate and irreparable damage to the Company and that the Company will be entitled to temporary and permanent injunctive relief and any other relief as a court may determine is appropriate. The Company is not liable in any way for content on a third party website that contains a link to the Site.

Jurisdiction
These Terms of Use, your access to and use of the Site and the Content, and any claims made at law or in equity against the Company or its officers, directors, employees and representatives, arising out of such access or use or otherwise, will be governed by and construed and interpreted in accordance with the applicable Canadian laws.

Other Agreements
If there is any conflict between the Terms of Use and any other agreement between you or your business and the Company, the latter agreements will prevail.

General
If any part of the Terms of Use is unlawful, void or unenforceable, then that part is severable and will not affect the validity and enforceability of the remaining Terms of Use.

The terms set out in this Legal Notice shall enure to the benefit of the Company, its officers, directors, representatives, employees, subsidiaries, affiliates and successors. The Company may assign its rights and duties under this Legal Notice at any time without notice to you. You may not assign your rights and duties set out herein to any individual or entity at any time without the consent of the Company.

Technical Disclosure Statement

QP Statement
All scientific and technical information in this website has been prepared by or reviewed and approved by Mr. Garrett Ainsworth, P.Geo., Vice President - Exploration & Development for NexGen. Mr. Ainsworth is a qualified person for the purposes of National Instrument 43-101 Standards of Disclosure for Mineral Projects (“NI 43-101”), and has verified the sampling, analytical, and test data underlying the information or opinions contained herein by reviewing original data certificates and monitoring all of the data collection protocols.

Mineral Resource Statement
For details of the Rook I Project including the quality assurance program and quality control measures applied and key assumptions, parameters and methods used to estimate the mineral resource set forth in this website for the Company’s Rook 1 Project, please refer to the technical report entitled “Technical Report on the Rook 1 Property, Saskatchewan, Canada” dated effective March 31, 2017 (the “Rook 1 Technical Report”) prepared by Mark B. Mathisen and David Ross, each of whom is a “qualified person” under NI 43-101. The Rook I Technical Report is available for review under the Company’s profile on SEDAR at www.sedar.com.

Exploration Information
Unless otherwise explicitly stated, for a description of the quality assurance program, quality control measures and a description of the type of analytical or testing procedures used by the Company to any exploration results, please refer to the Rook 1 Technical Report.

Radiation Readings
This website contains reports of natural gamma radiation in drill core. Natural gamma radiation is measured in counts per second (cps) using a Radiation Solutions Inc. RS-120 gamma-ray scintillometer. The reader is cautioned that total count gamma readings may not be directly or uniformly related to uranium grades of the rock sample measured; they should be used only as a preliminary indication of the presence of radioactive minerals. All intersections are downhole. True thicknesses are yet to be determined.

GT (Grade x Thickness) Measures
This website reports continuous GT. GT is calculated as grade (%U3O8) across core length thickness (m), and does not represent true thickness; true thicknesses are yet to be determined and will not be known until the resource is modelled.

Adjacent Properties
Where this website discloses information regarding one or more properties adjacent to one or more of the Company’s properties, the reader is cautioned that the Company has been unable to verify such information and such information is not necessarily indicative of the mineralization on the Company’s properties.