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NXE.TO ·

NexGen Energy to Host Q 2 202 5 Conference Call on Rook I Project Developments

Financials

NexGen Energy

to Host

Q

2

202

5

Conference Call on Rook I Project Developments

Vancouver,

BC

,

Aug 1st

th

-

NexGen Energy Ltd. ("NexGen"

or the

"Company")

(

TSX

: NXE

;

NYSE: NXE

;

ASX: NXG

)

is pleased to

announce

that

the

Company will host

its

202

5

second

quarter conference call

on

Wedn

esd

ay

,

August

7

, 202

5

,

at

8

:

3

0

am

Eastern

Standard

Time

.

During the call, NexGen’s

Founder,

President and Chief Executive Officer, Leigh Curyer, Chief Commercial

Officer, Travis McPherson, and Chief Financial Officer, Benjamin Salter, will provide a comprehensive

update on the Company’s 100%

-

owned Rook I Project

(the “

Project

”).

Th

is includes insights on

project

development

including

progress on the 2025 site

infrastructure program

,

an

update on

the latest insight on

the market as experienced by the Company

, and preparations for the final Commission Hearing

—

alongside exciting exploration updates

from the developing world

-

class PCE.

Call

-

in

D

etails:

Date:

Wednesday

,

August

7

, 202

5

Time:

8

:

3

0

am

Eastern

Standard Time

Participants should advise the operator that they are joining the "NexGen Energy Ltd. Conference Call" to

ensure proper admission to the event:

North America Toll Free

Number

:

1

-

8

33

-

7

52

-

3734

Au

s

tralia

Local

Toll

Number

:

+61

-

3

-

8592

-

6289

Participants accessing the call via either of the provided links will be automatically connected to the

NexGen Energy Ltd. conference without the need to speak with an operator:

International HD Web Phone

Access

:

Access Link

Call me

TM

:

Click Here

Prior to the call, t

he

Company

will file

its

2025

second

quarter

F

inancial Statements and Management

Discussion & Analysis

on

Tuesday

,

August

5

th

,

post

-

market

. These

fillings

will be available

for review on the

NexGen website under Reports and Filings and on the Company’s SEDAR+ profile at

www.sedarplus.com

.

In addition, a replay will be available on the NexGen website under Events & Presentations.

Further Information is available at

www.nexgenenergy.ca

.

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 standard

s 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 en

tire 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 environ

mentally.

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 sol

ving 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

Founder & Chief Executive Officer

NexGen Energy Ltd.

+1 604 428 4112

lcuryer@nxe

-

energy.ca

www.nexgenenergy.ca

Travis McPherson

Chief Commercial Officer

NexGen Energy Ltd.

+1 604 428 4112

tmcpherson@nxe

-

energy.ca

www.nexgenenergy.ca

Monica Kras

V

ice President

, Corporate Development

NexGen Energy Ltd.

+44

(0)

7307 191933

mkras@nxe

-

energy.ca

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. "Forwa

rd

-

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, anti

cipated

effects of completed drill results on the Rook I Project, planned work programs, completion of further site

investigations and engineering work to support basic engineering of the project and expected outcomes.

Generally, but not always, forward

-

lo

oking 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 connotat

ion 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 assumptions, 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 m

ade 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 prop

erty, 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 be available if and when needed

and on reasonable terms, that third party contra

ctors, 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

w

ill not change in a

materially

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 negative

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, eq

uipment 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 i

n 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

li

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

or other risks as more fully described in NexGen's Annual Information Form dated

March

3

, 202

5

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 on SEDAR+ at

www.sedarplus.ca

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 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.

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 reli

ance 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

.