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NexGen Announces Voting Results for Election of Directors Vancouver, BC, June 30th, 202 6 - NexGen Energy Ltd. ( “NexGen” or the “Company”) (TSX: NXE)

Corporate Updates

NexGen Announces Voting Results for Election of Directors

Vancouver, BC, June 30th, 202 6 - NexGen Energy Ltd. ( “NexGen” or the “Company”) (TSX: NXE)

(NYSE: NXE) (ASX: NXG) is pleased to announce the voting results for the election of the Company’s Board

of Directors and the renewal of the Shareholders Rights Plan at its annual general and special meeting of

shareholders held on June 30, 2026 (the “Meeting”).

A total of 458,979,268 common shares, representing approximately 69.34% of the Company's outstanding

common shares, were voted in person and by proxy at the Meeting. Shareholders voted in favour of (a)

Appointing PWC LLP as auditors of the Company (99.94% in favour), (b) setting the number of directors at

nine (95.01% in favour) and (c) approving a Shareholder Rights Agreement (98.02% in favour).

Shareholders also voted on the following matters at the Meeting:

Election of Directors

All nine nominees were elected to the NexGen Board of Directors at the Meeting . Each director will hold

office until the Company’s next annual meeting of shareholders, or until they resign or a successor is elected

or appointed. The voting results were as follows:

Nominee Votes For % For Votes

Withheld/Abstain

% Withheld

Leigh Curyer 430,904,050 98.82 5,164,248 1.18

Christopher McFadden 382,645,161 87.75 53,423,048 12.25

Richard Patricio 220,459,558 50.92 212,513,658 49.08

Sharon Birkett 429,420,299 98.48 6,647,910 1.52

Warren Gilman 313,467,797 71.89 122,600,502 28.11

Sybil Veenman 339,350,802 77.82 96,717,406 22.18

Karri Howlett 344,273,635 78.95 91,794,664 21.05

Bradley Wall 306,858,746 70.37 129,209,462 29.63

Ivan Mullany 385,084,900 88.31 50,983,308 11.69

About NexGen

NexGen Energy is a Canadian company focused on delivering clean energy fuel for the future. The

Company's flagship Rook I Project is being optimally developed into the largest low cost producing uranium

mine globally, incorporating the most elite standards in environmental and social governance. The Rook I

Project is supported by a NI 43 -101 compliant Feasibility Study which outlines the elite environmental

performance and industry leading economics. NexGen is led by a team of experienced uranium and mining

industry professionals with expertise across the entire mining life cycle, including exploration, financing,

project engineering and construction, operations and closure. NexGen is leveraging its proven experience

to deliver a Project that leads the entire mining industry socially, technically and environmentally. The

Project and prospective portfolio in northern Saskatchewan will provide generational long -term economic,

environmental, and social benefits for Saskatchewan, Canada, and the world.

NexGen is listed on the Toronto Stock Exchange, the New York Stock Exchange under the ticker symbol

“NXE” and on the Australian Securities Exchange under the ticker symbol “NXG” providing access to global

investors to participate in NexGen's mission of solving three major global challenges in decarbonization,

energy security and access to power. The Company is headquartered in Vancouver, British Columbia, with

its primary operations office in Saskatoon, Saskatchewan.

Contact Information

Leigh Curyer

Chief Executive Officer

NexGen Energy Ltd.

+1 604 428 4112

[email protected]

www.nexgenenergy.ca

Travis McPherson

Chief Commercial Officer

NexGen Energy Ltd.

+1 604 428 4112

[email protected]

http://www.nexgenenergy.ca

Monica Kras

VP, Corporate Development

+44 7307 191933

[email protected]

http://www.nexgenenergy.ca

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 the delivery of clean energy fuel for the future, the development of the largest

low cost producing uranium mine globally and incorporating elite standards in environmental and social

governance, delivering a project that leads the entire mining industry socially, technically and

environmentally, providing generational long -term econom ic, environmental and social benefits for

Saskatchewan, Canada and the world, planned exploration and development activities and budgets, the

interpretation of drill results and other geological information, mineral reserve and resource estimates (to

the extent they involve estimates of the mineralization that will be encountered if a project is developed),

requirements for additional capital, capital costs, operating costs, cash flow estimates, production estimates,

the future price of uranium and similar statements relating to the economics of a project, including the Rook

I Project. Generally, forward -looking information and statements can be identified by the use of forward -

looking terminology 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 NexGen's current expectations, beliefs,

assumptions, estimates and forecasts about its 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 results of planned exploration and development activities will be as anticipated and

on time; the price of uranium; the cost of planned exploration and development activities; that, as plans

continue to be refined for the development of the Rook I Project, there will be no changes in costs,

engineering details or specifications that would materially adversely affect its viability; 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 and development

activities will be available on reasonable terms and in a timely manner; that there will be no revocation of

government approvals; that general business, economic, competitive, social and political conditions will not

change in a material adverse manner; the assumptions underlying the Company's mineral reserve and

resource estimates; assumptions made in the interpretation of drill results and other geological information;

the ability to achieve production on the Rook I Project; and other estimates, assumptions and forecasts

disclosed in the Feasibility Study for the Rook I Project. Although the assumptions made by the Company

in providing forward-looking information or making forward-looking statements were considered reasonable

by management at the time they were made, 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 additional financing, the risk that pending ass ay

results will not confirm previously announced preliminary results, the imprecision of mineral reserve and

resource estimates, the price and appeal of alternate sources of energy, sustained low uranium prices,

aboriginal title and consultation issues, ex ploration and development risks, climate change, uninsurable

risks, reliance upon key management and other personnel, risks related to title to its properties, information

security and cyber threats, failure to manage conflicts of interest, failure to obta in or maintain required

permits and licences, changes in laws, regulations and policy, competition for resources, political and

regulatory risks, general inflationary pressures, industry and economic factors that may affect the business,

and other factors discussed or referred to in the Company's most recent Annual Information Form under

“Risk Factors” and management's discussion and analysis under “Other Risks Factors ” filed on SEDAR+

at www.sedarplus.ca and 40-F filed on 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 b e 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. 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.