Presentation

1. Arrow: A Rapidly Growing Uranium Discovery | October 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.
2

3. 3
Uranium Market (Demand)
A Story of Stable Demand Growth and Uncertain Supply
Nuclear Electricity Growth
• Nuclear energy currently fuels 11% of global power needs
• 930 GW needed by 2050 to support existing global decarbonisation mandates
• Equates to 2.3x 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
• 65 nuclear reactors currently 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 Uranium 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 under sever
sovereign risk (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
Recently Tripled Strike Length with Aggressive Step Outs

12. 12
A2: Another LookDots Represent Middle Point of Intercept with 50m Diameter ‘Halo’ Surrounding

13. 13
A2 High-Grade Sub-Zone
Characterized by Substantial Massive and Semi-Massive Pitchblende

14. 14
A3: Another High-Grade Shear Developing
Aggressive 50, 100 and 210m Step Outs from -44b ALL Hit Mineralization

15. 15
A3 Shear Continued
Dots Represent Middle Point of Intercept with 50m Diameter ‘Halo’ Surrounding

16. 16
Arrow: 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
• 11-48.3m true width
A3 Dimensions:
• 295m strike length
• 420m vertical extent
• 30-78.6m true width
2 High-grade Shear Zones Now Identified at Arrow

17. 17
Athabasca Basin Setting

18. 18
The Eagle Point Analogy
Eagle Point is an Underground Mine 100% Owned/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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1

19. 19
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

20. 20
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

21. 21
Patterson Conductor Corridor
Multiple Targets Along 7km Conductor Corridor to NE of Arrow

22. 22
BO-15-10: Visible Pitchblende

23. 23
On Land Gravity Low: Summer 2015

24. 24
Summer Drill Targeting – Bow, Derkson
• Multiple
high priority
targets
based on
the same
geophysical
signature as
Arrow
• All Land-
based
• Drilled first
holes into
Derkson
Corridor as
NexGen and
defined
further
exploration
targets

25. 25
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.

26. 26
NexGen Summary
• Arrow, a world-class uranium discovery that keeps growing
• +90% of holes hitting mineralization
• 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. Recently
drilled 50, 100 and 210m step outs to southwest of AR-15-44b
and all hit mineralization
• A brand new discovery made 3.7km northeast of Arrow called
“Bow”
• Well funded with ~C$29M cash on hand
• Aggressive 5 rig, expanded 30,000m summer 2015 program
underway 1.) As of June 30, 2015
1

27. 27
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 and a 0.05% U3O8 cut-off.
No NI 43-101 has been published for the Arrow
zone to date.

28. 28
APPENDICIES

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 253,972,116
Warrants ($0.45 - $0.65) 20,532,728
Options ($0.30 - $0.46) 22,149,446
Fully Diluted 296,654,290
Cash ~C$29M
Ownership
Management/Directors
Tigers Realm Minerals & Associates
Mega Uranium
~6%
~14%
~9%
1.) As of September 30, 2015
2.) As of June 30, 2015
1
2

31. Best known continuously mineralized angled drill holes
from the Athabasca Basin
Company Project Hole ID From (m) To (m)
Length
(m)
U3O8
(wt%)
GT
Cameco McArthur -299 42.0 83.8 41.8 48.3 2019
NexGen Arrow AR-15-44b* 455.5 624.0 168.5 5.0 843
NexGen Arrow AR-15-44b** 499.5 568.0 68.5 9.56 655
Fission PLS PLS14-248 130.0 177.5 47.5 13.2 627
NexGen Arrow AR-15-49c2** 426.0 495.0 69.0 8.77 605
Denison Wheeler WR-525 402.0 412.0 12.0 43.8 526
Hathor Roughrider MWNE-10-648 238.0 301.0 63.0 7.8 491
Cameco Cigar Lake 231B 429.5 435.0 5.5 55 303
Formation
Capital
Virgin
River
VR-031w3 797.0 831.0 33.9 8.7 296
UEX
Shea
Creek
SHE-114-05 N/A N/A 10.2 20.7 211
Source: Company reports, Dundee Capital Markets
*0.01% U3O8 cut-off, maximum internal dilution of 4.5m downhole
**0.01% U3O8 cut-off, maximum internal dilution of 2.0m downhole
31
A2 Produces 2 Top Tier Angled Holes

32. A2 Shear: AR-15-44b (68.5m @ 9.56% U3O8)
SRC Geoanalytical Results
Grade (U3O8%) x
Thickness (m) (GT)From (m) To (m)
Interval
(m)
U3O8 (wt%)
429.00 434.50 5.50 0.03 0.18
441.00 442.00 1.00 0.04 0.04
450.50 452.00 1.50 0.08 0.12
455.50 461.00 5.50 2.03 11.15
463.50 483.00 19.50 1.03 20.07
486.00 497.00 11.00 5.42 59.64
499.50 568.00 68.50 9.56
654.78
499.50 556.00 56.50 11.55
499.50 519.50 20.00 20.68
503.00 504.00 1.00 70.00
570.50 571.50 1.00 0.10 0.10
576.00 578.00 2.00 0.03 0.06
582.00 586.00 4.00 1.64 6.56
590.00 624.00 34.00 2.65 90.14
630.50 631.00 0.50 0.02 0.01
639.00 645.00 6.00 0.05 0.27
652.00 667.00 15.00 0.06 0.85
670.00 675.00 5.00 0.08 0.40
680.00 687.00 7.00 0.02 0.16
694.00 718.00 24.00 0.04 0.96
743.50 744.00 0.50 2.15 1.08
776.50 777.50 1.00 0.03 0.03
810.50 813.00 2.50 0.14 0.36
827.50 828.50 1.00 0.15 0.15
832.50 833.50 1.00 0.09 0.09
871.50 874.50 3.00 0.03 0.09
878.50 879.50 1.00 0.06 0.06
892.00 893.00 1.00 0.04 0.04
908.00 908.50 0.50 0.03 0.01
919.50 921.00 1.50 1.23 1.85
935.50 941.00 5.50 0.77 4.22
946.50 949.50 3.00 0.03 0.08
· Cutoff grade 0.01% U3O8 (weight %)
· Minimum thickness 0.5 m downhole
· Maximum internal dilution 2.00 m downhole
· U3O8 analyzed by ICP-OES at SRC laboratories, Saskatoon
· All depths and intervals are meters downhole
32

33. A2 Shear: AR-15-49c2 (69.0m @ 8.77% U3O8)
SRC Geoanalytical Results
Grade (U3O8%) x
Thickness (m) (GT)From (m) To (m)
Interval
(m)
U3O8
(wt%)
403.50 404.50 1.00 0.03 0.03
426.00 495.00 69.00 8.77
604.90
426.00 485.50 59.50 10.13
435.50 485.50 50.00 12.01
456.00 474.00 18.00 20.55
465.00 469.50 4.50 40.64
466.50 467.00 0.50 76.00
499.00 512.00 13.00 0.04 0.57
534.00 534.50 0.50 0.11 0.06
569.00 573.50 4.50 0.15 0.68
631.50 634.00 2.50 0.10 0.24
639.00 649.00 10.00 0.05 0.52
652.00 653.50 1.50 0.07 0.10
658.50 663.50 5.00 0.09 0.44
666.00 677.00 11.00 0.11 1.16
688.00 689.50 1.50 0.04 0.05
714.00 733.00 19.00 0.06 1.19
739.50 744.00 4.50 0.02 0.11
747.50 753.00 5.50 0.12 0.67
756.00 764.00 8.00 0.04 0.33
775.00 776.50 1.50 0.02 0.03
780.50 781.00 0.50 0.33 0.17
792.50 793.00 0.50 0.02 0.01
797.50 798.00 0.50 0.07 0.03
805.50 806.00 0.50 0.26 0.13
812.50 813.50 1.00 0.78 0.78
818.00 819.00 1.00 0.04 0.04
827.50 829.50 2.00 0.42 0.84
832.00 834.00 2.00 0.40 0.81
849.50 850.50 1.00 0.03 0.03
876.50 877.50 1.00 0.16 0.16
· Cutoff grade 0.01% U3O8 (weight %)
· Minimum thickness 0.5 m downhole
· Maximum internal dilution 2.00 m downhole
· U3O8 analyzed by ICP-OES at SRC laboratories, Saskatoon
· All depths and intervals are meters downhole
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34. 34
Semi-Massive and Massive Pitchblende
Hole AR-15-58c1

35. 35
Arrow: No Freezing
• Cigar Lakeisworld-class insizeandgrade, butfacessignificant challenges
duetofactorebodyissandstone-hosted which meanshighly specialized
freezing technology within thewetrockconditions mustbeused.
• Unlike McArthurRiver andCigar Lakewhich have600and480m of
sandstone ontopoftheorebodies, respectively -Arrowonly has10-20m of
sandstone within 80mofsurface.
• Arrowisbasement-
hostedwhich
meansNOfreezing
would berequired
asthe
mineralization is
hostedwithin
competent rocks.

36. 36
Analyst Coverage
Tyron Breytenbach -
Cormark Securities Inc.
(416) 943
6747
BUY 150Mlbs C$3.00
Rob Chang – Cantor
Fitzgerald Canada
(416) 849
5008
TOP PICK 115Mlbs N/A
David Sadowski –
Raymond James Ltd.
(604) 659
8255
STRONG
BUY
100Mlbs C$1.80
David Talbot –
Dundee Capital
Markets
(416) 350
3082
BUY N/A N/A
Phil Swifen – Numis
Securities Ltd.
+44 (0)20
7260 1430
BUY N/A N/A

37. 37
Contact
Travis McPherson
Corporate Development
C: +1 604.816.2686
T: +1 604.428.4112
tmcpherson@nexgenenergy.ca