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NexGen Energy Appoints Sybil Veenman and Karri Howlett to Board of Directors

Management Changes

NexGen Energy Appoints Sybil Veenman and Karri Howlett to Board of

Directors

Vancouver, BC, August 27 , 2018 – NexGen Energy Ltd. (“NexGen” or the “Company”) (TSX :NXE, NYSE

MKT:NXE) is pleased to announce the appointment of Ms Sybil Veenman and Ms Karri Howlett to the

Company’s Board of Directors.

Leigh Curyer, Chief Executive Officer, commented: “On behalf of the Executive and Board of NexGen we are

very pleased to welcome Ms Veenman and Ms Howlett. Both bring outstanding attributes and successful Board

level experience in multi-billion dollar corporations in the mining and energy sectors across the disciplines of

legal, transactional and occupational health and safety. We look forward to their contributions in the exciting

development of NexGen as the Company continues to deliver a truly unique economic, environmental and

socially responsible opportunity to fruition.”

Sybil Veenman

Ms Veenman brings over 20 years of mining industry experience both as a public company director and as a

senior executive. She currently serves as a Director at Nasdaq-listed Royal Gold Inc., NYSE-listed IAMGOLD

Corporation and TSXV-listed Noront Resources Ltd. She is also on the Board of Directors of the Boost Child &

Youth Advocacy Centre in Toronto, a non-profit organization dedicated to providing child and youth

services and support. Previously, she was Senior Vice-President and General Counsel and a member of the

executive leadership team at Barrick Gold Corporation. In that capacity, she was responsible for overall

management of legal affairs, extensively engaged in that company’s significant M&A and financing

transactions and involved in a wide range of operational, regulatory, political and social aspects of the mining

business.

She holds a Law degree from of the University of Toronto and has completed the Institute of Corporate

Directors, Directors Education Program and obtained the ICD.D designation from the Institute.

Karri Howlett, CFA, C.Dir.

Ms Howlett has 20 years of experience in corporate strategy, mergers and acquisitions, financial due diligence,

and risk analysis. She currently sits on the Boards of SaskPower (as Chair of the Safety, Environment and Social

Responsibility Committee), Saskatchewan Trade Export Partnership (as Chair of the Audit Committee), RESPEC

Consulting Inc., and RSI Consulting Inc.

She has conducted financial due diligence and risk analysis for several business endeavors, including business

advisement and financial modelling for se veral mining and energy projects, as well as mergers of financial

institutions.

She is currently President and a member of the Board of Directors of RESPEC Consulting Inc. (formerly

North Rim Exploration Ltd.)., which is a geosciences and engineering consulting company based in

Saskatoon, Saskatchewan.

She holds a bachelor of commerce ( with honors) in finance from the University of Saskatchewan and has

earned the Chartered Financial Analyst (CFA) designation and the Chartered Director designation. An active

community member, she has previously served on the boards of the Varsity View Com munity Association,

Skate Saskatoon, and CFA Society of Saskatchewan. In addition, she has been involved with the University of

Saskatchewan’s Edwards School of Business as a lecturer in the Department of Finance, a participant in the

Leadership Development Program, and a protégé in the Betty Ann Heggie Womentorship Program.

With this appointment, the NexGen Board comprises eight members, of which six are independent.

About NexGen

NexGen is a British Columbia corporation with a focus on the acquisition, ex ploration and development of

Canadian uranium projects. NexGen has a highly experienced team of uranium industry professionals with a

successful track record in the discovery of uranium deposits and in developing projects through discovery to

production.

NexGen owns a portfolio of prospective uranium exploration assets in the Athabasca Basin, Saskatchewan,

Canada, including a 100% interest in Rook I, location of the Arrow Deposit in February 2014, the Bow discovery

in March 2015, the Harpoon discovery in August 2016 and the Arrow South discovery in July 2017. The Arrow

deposit's updated mineral resource estimate with an effective date of December 20, 2016 was released in

March 2017, and comprised 179.5 M lbs U3O8 contained in 1.18 M tonnes grading 6.88% U3O8 in the Indicated

Mineral Resource category and an additional 122.1 M lbs U3O8 contained in 4.25 M tonnes grading 1.30%

U3O8 in the Inferred Mineral Resource category.

Leigh Curyer

Chief Executive Officer

NexGen Energy Ltd.

+1 604 428 4112

[email protected]

www.nexgenenergy.ca

Travis McPherson

Vice President Corporate Development

NexGen Energy Ltd.

+1 604 428 4112

[email protected]

http://www.nexgenenergy.ca

For Media Inquiries:

Jonathan Goldberg

KCSA Strategic Communications

+1 212 896 1282

[email protected]

Forward-Looking Information

The information contained herein contains "forward -looking statements" within the meaning of the United

States Private Securities Litigation Reform Act of 1995 and "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. 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", "an ticipates", 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 connotation thereof.

Forward-looking information and statements are based on the then current expectations, beliefs, assumptions,

estimates and forecasts about NexGen's business and the industry and markets in which it operates. Forward -

looking information and statem ents are made based upon numerous assumptions, including among others,

that the proposed transaction will be completed, the results of planned exploration activities are as anticipated,

the price of uranium, the cost of planned exploration activities, that financing will be available if and when

needed and on reasonable terms, that third party contractors, equipment, supplies and governmental and other

approvals required to conduct NexGen's planned exploration activities will be available on reasonable term s

and in a timely manner and that general business and economic conditions will not change in a material adverse

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 results, performances and achievements of NexGen to differ materially

from any projections of results, performances and achievements of NexGen expressed or implied by such

forward-looking information or statements, including, among others, negative operati ng cash flow and

dependence on third party financing, uncertainty of the availability of additional financing, the risk that pending

assay results will not confirm previously announced preliminary results, imprecision of mineral resource

estimates, the app eal of alternate sources of energy and sustained low uranium prices, aboriginal title and

consultation issues, exploration risks, reliance upon key management and other personnel, deficiencies in the

Company's title to its properties, uninsurable risks, fa ilure to manage conflicts of interest, failure to obtain or

maintain required permits and licenses, changes in laws, regulations and policy, competition for resources and

financing, and other factors discussed or referred to in the Company's Annual Informa tion Form dated March

31, 2017 under "Risk Factors".

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 diff er 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 resul t of new information or

events except as required by applicable securities laws.

SOURCE NexGen Energy Ltd.