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NexGen Update on Operations and Activities due to COVID-19

Mine Development & Operations

NexGen Update on Operations and Activities due to COVID-19

Vancouver, BC, March 25, 2020 – NexGen Energy Ltd. (“NexGen” or the “Company”) (TSX: NXE, NYSE MKT:

NXE) is providing an update on the operational and corporate impacts of the C OVID-19 pandemic on its

planned activities.

Firstly, the Company is pleased to report that no confirmed or suspected cases of C OVID-19 within the

organization have been identified. Strong measures and proactive steps were immediately implemented in

accordance with those recommended by Provincial (both B.C. and Saskatchewan) and Federal Health

Authorities. The safety of the Company’s employees, contractors, consultants and communities is always

the first priority. NexGen confirms that all of the assets of the Company including at the 100% owned Rook

I site and the offices (in Saskatoon and Vancouver) are secure and operational in accordance with the

Federal and Provincial Health Authorities guidelines.

With the current and forecasted impacts due to COVID -19, NexGen has conducted a detailed review of all

corporate, operational and community aspects including the planned work programs on the Feasibility

Study (“FS”) and Environmental Assessment (“EA”). It is clear the working environments and practices of

the Company and its key consultants , for an indeterminate period of time , are impacted in terms of the

ability, collectively, to safely complete certain work programs . As a consequence, the Company has

postponed “yet to commence” work programs associated with both the FS and EA. Previously commenced

“in progress” work programs ( including environmental monitoring and community programs ) are

continuing where it has been assessed the function is not impacted by the current Health Authority

guidelines. A reschedule d timeline for the FS and filing of the Environmental Impact St atement will be

communicated once the Company and its consultants establish a return to normalized working conditions.

In the interim, all workflows will continue to be optimized in light of th e current health and economic

climate.

NexGen’s current working capital is approximately $44 million. Since July 2019, the Company has had a very

low burn rate after all FS-related drilling was completed. The focus since that time has centred on the

engineering studies, EA programs and continual community consultation and engagement. Further, the

Company has considerable flexibility on the timing and amount of expenditures related to the F S and EA

during this interrupted period, and is well positioned for any period of disruption to ensure the Company is

optimally set to return to normal working environments immediately.

In the interim, the Company will continue to focus on the communities with regular consultation and

engagement through video and conference call facilities to advance the solid foundation that has defined

NexGen’s culture and approach since prior to drilling commencing in July 2013.

Leigh Curyer, Chief Executive Officer, commented: “ Firstly, we hope and trust al l our industry colleagues,

stakeholders, communities, their families and friends are healthy and continue to be safe during these

unprecedented times. These times necessitate strong leadership and coordinated efforts across our entire

industry and stakehol ders. NexGen is committed to the measures and guidelines of the public health

authorities, ensuring business disruptions are mitigated where possible and once COVID -19 is contained,

optimally delivering on its objectives and committing to assist our indust ry colleagues, stakeholders and

communities to re-establishing their operations.

NexGen’s culture and approach is to create as many positive outcomes as possible no matter the challenge

and COVID-19 is no different in that respect. NexGen is built on a fo undation of resilience and we are all

steadfast in our ability to come out of this challenging period for humanity stronger than ever.”

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 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

discovered in February 2014, the Bow discovery in March 2015, the Harpoon discovery in August 2016 and the

Arrow South discovery in July 2017. NexGen is the recipient of the PDAC's 2018 Bill Dennis Award and the 2019

Environmental and Social Responsibility Award.

Contact Information

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

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", "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 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 statements 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 term s, that third party contractors, equipment, supplies and governmental and other

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

in a timely manner and that general business and economic condit ions 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 operating cash flow and dependence on third party

financing, uncertainty of t he availability of additional financing, the risk that pending assay results will not

confirm previously announced preliminary results, imprecision of mineral resource estimates, the appeal 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, failure to manage conflicts of interest, failure to obtain or maintain r equired 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 Information Form dated March 11, 2020 under "Risk Factors".

Although the Com pany 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. Accordin gly,

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.

SOURCE NexGen Energy Ltd.