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NexGen Announces Uplisting on the New York Stock Exchange

Listings & Exchange

NexGen Announces Uplisting on the New York Stock Exchange

Vancouver, BC, March 1, 2022 - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE)

(ASX: NXG) is pleased to announce that it has been approved for uplisting on the New York Stock Exchange

("NYSE") from its current listing on the NYSE American LLC ("NYSE American"). The Company's common stock

will begin trading under the symbol "NXE" at the opening of trading on March 4, 2022.

Leigh Curyer, Chief Executive Officer commented: “The uplisting on the NYSE is a major corporate milestone

for NexGen in creating long-term value and an expansion of our global shareholder base. This listing is a

demonstration of NexGen’s corporate governance standards, size, liquidity and exceptional value proposition

offered to global investors allocating capital to elite ESG entities at a time the demand for reliable and sustainable

clean air energy fuel is undergoing a generational transition.”

About NexGen

NexGen is a British Columbia corporation focus ed on the development of the Rook I Project located in the

southwestern Athabasca Basin, Saskatchewan, Canada, into production. The Rook I Project is supported by a NI

43-101 compliant Feasibility Study which outlines elite environmental performance as well as industry leading

economics. Rook I hosts the Arrow Dep osit that hosts Measured Mineral Resources of 209.6 M lbs of

U3O8 contained in 2.18 M tonnes grading 4.35% U3O8, Indicated Mineral Resources of 47.1 M lbs of

U3O8 contained in 1.57 M tonnes grading 1.36% U3O8, and Inferred Mineral Resources of 80.7 M lbs o f

U3O8 contained in 4.40 M tonnes grading 0.83% U3O8.

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. The Company is the

recipient of the 2018 PDAC Bill Dennis Award for Canadian mineral discovery and the 2019 PDAC

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

Senior Vice President Corporate Development

NexGen Energy Ltd.

+1 604 428 4112

[email protected]

http://www.nexgenenergy.ca

SOURCE: NexGen Energy Ltd.

Technical Disclosure

All technical information in this news release has been reviewed and approved by Anthony ( Tony) George ,

P.Eng, NexGen's Chief Project Officer, a qualified person under National Instrument 43-101.

A technical report in respect of the FS is filed on SEDAR ( www.sedar.com ) and EDGAR

(www.sec.gov/edgar.shtml ) and is available for review on NexGen Energy's website (www.nexgenenergy.ca ).

Cautionary Note to U.S. Investors

This news release includes Mineral Reserves and Mineral Resources classification terms that comply with

reporting standards in Canada and the Mineral Reserves and the Mineral Resources estim ates are made in

accordance with NI 43 -101. NI 43 -101 is a rule developed by the Canadian Securities Administrators that

establishes standards for all public disclosure an issuer makes of scientific and technical information concerning

mineral projects. Th ese standards differ from the requirements of the Securities and Exchange Commission

("SEC") set the SEC's rules that are applicable to domestic United States reporting companies. Consequently,

Mineral Reserves and Mineral Resources information included in this news release is not comparable to similar

information that would generally be disclosed by domestic U.S. reporting companies subject to the reporting and

disclosure requirements of the SEC Accordingly, information concerning mineral deposits set forth herein may

not be comparable with information made public by companies that report in accordance with U.S. standards.

Forward-Looking Information

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

United States securities laws and regulations 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 mineral reserve and mineral resource estimates, the 2021 Arrow Deposit, Rook I Project and estimates

of uranium production, grade and long-term average uranium prices, anticipated effects of completed drill results

on the Rook I Project, planned work programs, completion of fu rther site investigations and engineering work

to support basic engineering of the project and expected outcomes. 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. Statements relating to

"mineral resources" are deemed to be forward-looking information, as they involve the implied assessment that,

based on certain estimates and assumptio ns, the mineral resources described can be profitably produced in the

future.

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 mineral reserve and resources estimates and the key assumptions and parameters on which such estimates are

based are as set out in this news release and the technical report for the property , the results of planned

exploration activities are as anticipated, the price and market supply of uranium, the cost of planned exploration

activities, that financing will b e 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 terms 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

in the future.

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, the existence of ne gative operating 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, conclusions of economic valuations, the

risk that actual results of exploration activities will be different than anticipated, the cost of labour, equipment

or materials will increase more than expected, that the future price of uranium will decline or otherwise not rise

to an economic level, the appeal of alternate sources of energy to uranium -produced energy, that the Canadian

dollar will strengthen against the U.S. dollar, that mineral resources and reserves are not as estimated, that actual

costs or actual results of reclamation activities are greater than expected, that changes in project parameters and

plans continue to be refined and may result in increased costs, of unexpected variations in mineral resources and

reserves, grade or recovery rates or other risks generally associated with mining, unanticipated delays in obtaining

governmental, regulatory or First Nations approvals, risks related to First Nations title and consultation, 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 required permits and licences, risks

related to changes in laws, regulations, policy and public perception, as well as those factors or other risks as more

fully desc ribed in NexGen's Annual Information Form dated March 11, 2020 filed with the securities

commissions of all of the provinces of Canada except Quebec and in NexGen's 40-F filed with the United States

Securities and Exchange Commission, which are available o n SEDAR at www.sedar.com and Edgar

at www.sec.gov .

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 statements or implied by forward-looking

information or statements, there may be other factors that cause results not to be as anticipated, estimated or

intended. Readers are cautioned not to place undue reliance on forward-looking information or statements due

to the inherent uncertainty thereof.

There can be no assurance that forward-looking information and statements will prove to be accurate, as actual

results and future events could differ materia lly 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.