Corporate Presentation

1. Arrow: A Rapidly Growing Uranium Discovery | August 2015

2. Disclaimer
Information Contained In This Presentation
This presentation is a summary description of NexGen Energy Ltd. (“NexGen” or the
“Company”) and its business and does not purport to be complete. This presentation is
not, and in no circumstances is it to be construed as, a prospectus, an advertisement,
or a public offering of securities. No securities regulatory authority or similar authority
has reviewed or in any way passed upon the document or the merits of the Company’s
securities and any representation to the contrary is an offence.
Except where otherwise indicated, the information contained in this presentation has
been prepared by NexGen and there is no representation or warranty by NexGen or
any other person as to the accuracy or completeness of the information set forth
herein. This presentation includes information on adjacent properties that was
obtained from various publicly available sources referred to herein and the accuracy
and completeness of such information has not been verified by NexGen. Except as
otherwise stated, information included in this presentation is given as of the date
hereof. Neither the delivery of this presentation nor any sale made under the terms
described herein shall imply that the information herein is correct as of any date after
the date hereof.
All dollar amounts referenced herein, unless otherwise indicated, are expressed in
Canadian dollars.
Cautionary Note Regarding Forward-looking Information
Statements contained in this presentation that are not current or historical factual
statements may constitute “forward-looking information” within the meaning of
applicable securities laws including statements with respect to the properties, a
concurrent financing, our plans for exploration and development of our properties and
our financial condition, operations and prospects. The forward-looking information
reflects current expectations regarding future results, performance or achievements
and speaks only as of the date of this presentation. When used in this presentation,
forward-looking information can be identified by such words as “may”, “will”, “expect”,
“believe”, “plan”, “project”, “anticipate”, “intend”, “estimate” and other similar
terminology. Such forward-looking information involves known and unknown risks,
uncertainties and other factors that may cause the actual results, performance or
achievements of the Company to be materially different from any future results,
performance or achievements expressed in or implied by such information. Such risks,
uncertainties and other factors include, but are not limited in any manner to those risks
set forth in this presentation under the heading “Risk Factors”, including, the risk that
no mineralization will be identified on the Radio and Rook I properties; the Company’s
dependence on third party financing; the Company’s limited operating history; risks
inherent in exploration activities; environmental and safety risks including increased
regulatory burdens; unexpected geological or hydrological conditions; a possible
deterioration in political support for nuclear energy; changes in government regulations
and policies, including trade laws and policies; demand for nuclear power; failure to
obtain necessary permits and approvals from government authorities; weather and
other natural phenomena; and other exploration, development, operating, financial
market and regulatory risks. The foregoing list of factors is not exhaustive.
The forward-looking information contained in this presentation requires management to
make certain assumptions including with respect to the financing and its ability to
successfully develop its properties. Although management of the Company believes
that the assumptions underlying, and the expectations reflected in, the forward-looking
information are reasonable, significant risks and uncertainties are involved in such
information. Management can give no assurances that its assumptions, estimates and
expectations will prove to have been correct. Forward-looking information should not
be read as guarantees of future performance or results, and will not necessarily be
accurate indications of whether or not or the times at or by which such performance or
results will be achieved. Many factors that are beyond the Company’s control could
cause actual results to differ materially from the results discussed in the forward-
looking statements.
The technical information in this presentation has been prepared in accordance with
the Canadian regulatory requirements set out in National Instrument 43-101 and
reviewed on behalf of NexGen Energy Ltd., by Garrett Ainsworth, P.Geo., Vice
President – Exploration & Development, a qualified person.
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3. 3
Uranium Market (Demand)
A Story of Stable Demand Growth and Uncertain Supply
Nuclear Electricity Growth
• Nuclear energy fuels 11% of the global electricity needs
• 930 GW needed by 2050 to support existing global decarbonisation mandates
• Equates to a 2.3 times increase in nuclear energy demand in just 35 years
Uranium Demand
• Average demand growth estimated at ~4% per year to 2024
Source: International Energy Agency (2015), World Nuclear
Association (2015)

4. 4
Uranium Market (Demand)
Investment and Reactor Builds
• Currently 437 nuclear reactors in operation globally
• As of April 2015, 65 nuclear reactors are under construction
• China: 26 currently, 23 under construction, 187 in planning/proposal phase
• China Nuclear Power Corp. “looking to invest in Canada in the near future” (Dec. 2014)
• Another 496 reactors are in the planning/proposal phase
1.) Graph: International Energy Agency (2015)
2.) World Nuclear Association (2015)
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2

5. 5
Uranium Market (Supply)
Lack of Economic Deposits
• In 2014 world uranium
consumption was
155Mlbs while mine
supply accounted for
147Mlbs
• +20Mlbs from
HEU agreement
(now over)
• Estimated supply gap of
nearly 100Mlbs per year
by 2030
• 11 of top 15 uranium
mines are in unstable
jurisdictions (Russia,
Kazakhstan, Niger)
End of HEU agreement in 2013 removed the equivalent of
McArthur River’s annual production from supply
1.) World Nuclear Association (2015)
2.) World Nuclear Association estimate of 97,450tU demand
and 53,000 tU supply in 2030
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6. 6
The Athabasca Basin
The Source of Future Supply
1.) World Nuclear Association (2015)
2.) Cameco Corp.
3.) Based on US$45/lb U & US$1,300/oz Au
Remember: 1.00% U3O8 = 23.50 g/t gold!
• Global average
resource grades
~0.10% U3O8
• Athabasca Basin
mines produce at
over 100X global
average resource
grade
• McArthur River
produced 19Mlbs
at average grade
of 14.87% U3O8
in 2014
1
2
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7. 7
Project Overview
Focus: High-tonnage, high-grade, technically superior assets in shallow sections of the
Athabasca Basin
Portfolio Characteristics
• Straddles the edge and inside of the Athabasca Basin
• Enables NexGen to find basement-hosted, unconformity-hosted and sandstone-
hosted mineralization
• Hosts the land-based Arrow discovery

8. 8
Arrow Discovery
Rook I Project Location & Conductor Corridors
• Most dominant land
position in the
Southwest Athabasca
Basin
• Arrow discovered Feb
2014 with 1st drill hole
and drilling at +90% hit
rate
• Land-based discovery
located straddling and
inside the Athabasca
Basin boundary
• Basement-hosted high-
grade mineralization
that grows all directions
and at depth
Rook I hosts all the known uranium bearing conductor corridors
in the region

9. 9
Successful Drilling at Arrow
+90% of Drill Holes Intersected High-grade Uranium Mineralization
NexGen’s Drilling
Methodology:
1. Wide step-outs
2. Angled Holes: 90% of
holes drilled are angled
3. Efficient capital
allocation: 8:1 $ in the
ground to $ to G&A
4. Incredible hit rate:
+90% of holes hit
mineralization
Results:
Current Area of
Mineralization:
• Length x width
645 m x 215 m
• Depth
100 m to 920 m

10. 10
Arrow: A2 & A3 Shears
Plan view of Arrow

11. 11
A2: Continues to Expand

12. 12
A3: New High-grade Shear Developing

13. 13
Arrow: A2 & A3 Cross-Section
• Both A2 and A3
Zones remain
open in every
direction
• NE extent of Arrow
opened up with
AR-15-40b (11.5m
at 0.99% U3O8)
A2 Dimensions:
• 300m strike length
• 340m vertical extent
• 11-27.5m true width
A3 Dimensions:
• 295m strike length
• 420m vertical extent
• 30-78.6m true width
2 High-grade shear zones now identified at Arrow

14. 14
Athabasca Basin Setting

15. 15
The Eagle Point Analogy
Eagle Point is an underground mine operated by Cameco
- Eagle Point current mineral reserves: 15.2Mlbs at 0.61% U3O8. 2014 annual production of 4.2Mlbs
- Underground mine using longhole stoping in the competent basement rock
- Eagle Point deposits are located on the eastern edge of the Athabasca Basin, and are part of the Rabbit Lake Uranium district which also
includes the Rabbit Lake and Collins Bay deposits.
- Rabbit Lake District produced +198Mlbs of uranium concentrates since production began in 1975
1.) Cameco Corp.
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16. 16
Dravite Breccia – McArthur River & Arrow
1.) Cameco Corp.
Arrow: AR-14-15 422.25m Dravite associated (or proximal) to mineralization
McArthur River: Dravite-Chlorite-filled Breccias associated with high-grade
mineralization
1

17. 17
Bow: New Discovery 3.7km NE of Arrow
BO-15-10:
• 9.5m @ 0.20%
U3O8 including
1m @ 1.44%
U3O8
• 66m step-out to
east of drill hole
BO-15-02
• Now identified a
350m strike
length of
anomalous
radioactivity at
Bow
• Currently drilling
land target to
NE of Bow

18. 18
Bow Discovery Drill Locations

19. 19
BO-15-10: Visible Pitchblende

20. 20
Patterson Conductor Corridor
Multiple targets along 7kms of conductor corridor
• BO-15-10, -02
drilled into a
gravity low
anomaly with
coincident
VTEM
conductor
and radon in
lake water
anomaly with
peak reading
of 36.0pCi/L

21. 21
On Land Gravity Low: Summer 2015

22. 22
Summer Drill Targeting – Bow, Derkson
• Multiple
high priority
targets
based on
the same
geophysical
signature as
Arrow
• Land-based
• Regional
summer drill
program to
further
define Bow
and drill first
holes in
Derkson
conductor
corridor

23. 23
Eastern Athabasca Basin Portfolio
High Quality Portfolio:
1. Radio: located directly
adjacent to and long strike of
Roughrider, Rio Tinto acquired
for $654M in February 2012.
2. Thorburn Lake: 9 of 15 drill
holes have intersected uranium
mineralization.
3. Madison and 2Z Lake:
contain shallow (<100m thick)
sandstone-hosted uranium
mineralization, and is along
strike from U-mineralized
conductors. Represent good
potential for discovery of new
basement-hosted uranium
deposits.

24. 24
NexGen Summary
• Arrow, a world-class uranium discovery that keeps growing
• 44 of 46 holes hit mineralization (~96% hit rate)
• Aggressive and deliberate drilling methodology
• Area of mineralization 645 m x 215 m, vertical extent
commencing from 100 m down to 920 m
• Two high-grade shear zones; A2 & A3 identified with broad
intercepts of high-grade uranium encountered
• Arrow remains open in every direction and at depth with AR-
15-44b – recently drilled 50, 100 and 210m step outs to
southwest all hit mineralization
• A brand new discovery made 3.7km northeast of Arrow called
“Bow”
• Closed C$27.3M bought-deal financing in May 2015
• Aggressive 5 rig, 25,000m summer 2015 program underway

25. 25
Arrow: Perspective on Size
The Empire State Building next to Arrow
Empire State Building
Total height: 443m
(~54% of Arrow’s height)
Arrow
Total height: 820m
(starting from 100m of
surface)
Image made via Leapfrog software using latest drill
data from Arrow zone. No NI 43-101 has been
published for the Arrow zone to date.

26. 26
APPENDICIES

27. 27
AR-15-44b - A record hole at Arrow

28. 28
NexGen Outperforming Peers
* 3-month share price returns in Canadian Dollars
as of July 1, 2015

29. 29
Executive, Board & Technical Team
Executive
Leigh Curyer
Chief Executive Officer
Garrett Ainsworth
VP Exploration & Development
Grace Marosits
Chief Financial Officer
Travis McPherson
Corporate Development Manager
Board
Chris McFadden
Chairman
Richard Patricio
Trevor Thiele
Craig Parry
Gerry Feldman
James Currie
Directors
Technical Team
Garrett Ainsworth
VP Exploration & Development
Adam Engdahl
Project Manager - Saskatchewan
Galen McNamara
Project Manager - Geology
Technical Advisory
Andrew Browne
former VP Exploration & Development
Craig Parry
Director
Strong team with a
successful track record in
uranium exploration and
development.

30. 30
Capital Structure
Shares Issued & Outstanding 253,414,116
Warrants ($0.45 - $0.65) 20,532,728
Options ($0.30 - $0.46) 21,957,446
Fully Diluted 295,904,290
Cash ~C$30M
Ownership
Management/Directors
Tigers Realm Minerals & Associates
Mega Uranium
~6%
~14%
~9%
1.) As of July 15, 2015
2.) Company recently closed C$27.3M financing
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31. 31
The Éléonore Example
Putting Arrow’s depth extent in context
Goldcorp’s Newest Mine:
Mine Plan
• 1,145m depth (starting at 55m
from surface)
Average Gold Grade
• 6.34g/t Au (equivalent to 0.27%
U3O8)
Development Capex
• US$1.8 billion
1.) Goldcorp
2.) Based on US$45/lb U & US$1,300/oz Au
1
1
2
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32. 32
Arrow: No Freezing
• Arrowisbasement-hosted which meansNOfreezing would berequired
• Unlike McArthurRiver andCigar Lakewhich have600and480m of
sandstone ontopoftheorebodies, respectively -Arrowonly has10-20m of
sandstone within 80mofsurface
• Cigar Lakeisworld-
classinsizeand
grade, butfaces
significant
challenges dueto
factoreis
sandstone-hosted
andrequires
futuristicmining
methods

33. 33
Analyst Coverage
Mike Kozak - Cormark
Securities Inc.
(416) 943 6749 BUY C$1.75
Rob Chang – Cantor
Fitzgerald Canada
(416) 849 5008 TOP PICK N/A
David Sadowski –
Raymond James Ltd.
(604) 659 8255 BUY C$1.80
David Talbot – Dundee
Capital Markets
(416) 350 3082 BUY N/A
Andrew Mikitchook–
Edgecrest Capital
(416) 687 6613 BUY C$1.10

34. 34
Contact
Travis McPherson
Corporate Development
C: +1 604.816.2686
T: +1 604.428.4112
tmcpherson@nexgenenergy.ca