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Cantor Fitzgerald Uranium Conference

New York April 3, 2014

Picture: Rook I camp

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.

Note: There is no known uranium mineralization at either the Radio Project or

Rook I. Information regarding adjacent properties contained in this presentation is

not necessarily indicative of the mineralization at the projects described herein.

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.

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NexGen Energy Ltd. holds one of

the most dominant land positions

in the Athabasca basin,

immediately adjacent to world

class uranium deposits.

- High grade

- High tonnage

- Highly economical

- Solid jurisdiction

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Share Structure

As of March 31, 2014

Shares Issued & Outstanding 170,025,760

Warrants ($0.40 - $0.65) 39,505,472

Options ($0.30 - $0.425) 9,635,637

Fully Diluted 219,166,869

Cash $15M

Ownership Tigers Realm Minerals & Associates

Mega Uranium

Radio Optionors (x3)

19%

18%

10%

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TSX-V:

NXE

Management

Gordon Bogden Chairman

Leigh Curyer Chief Executive Officer

Andriyko Herchak Chief Financial Officer

Chris McFadden Director

Trevor Thiele Director

Richard Patricio Director

Gerry Feldman Director

James Currie Director

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Strong board with a

successful track record in

uranium exploration.

Exploration Team

Andrew Browne VP Exploration & Development

James Sykes Senior Geologist

Matthew Schwab Exploration Geologist

Project Overview

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Project Overview

Athabasca Basin

SASKATCHEWAN

Located in the shallower sections of the Athabasca Basin

Key Projects:

Arrow: Adjacent to the Patterson Lake

South Discovery

*Acquired prior to PLS discovery

Rook I: Arrow

Adjacent to Rio Tinto’s Roughrider

Project. Optioned prior to RIO

purchasing Hathor

Radio

Rook 1- Arrow

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Blue Rig (RK-14-24) Red Rig (RK-14-21 & -25)

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Patterson

Lake South

Rook 1 Location

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Arrow

Rook I – West, 12 Target Areas

(3/3 – Target Areas drilled / uranium mineralisation)

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Area A (hole 05), Area D (hole 22), and “Arrow” (hole 21-30)

Patterson Lake

South

Target Area A

4M @ 330ppm

Arrow

Area A (hole 5

4M @ 330ppm)

Area D

“Arrow” RK-14-21 discovery hole

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Arrow Discovery: Target Area 2014

• Conductor break

• Gravity low

• Interpreted linear &

cross structures

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Arrow 3D Schematic Structural interpretation

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Arrow Discovery: 215 meter Step Out 2PGA-1000 down-hole gamma probe results (capped at 10,000cps)

RK-14-21

Discovery hole RK-14-27

RK-14-30

20 meters S-W 195 meters S-W

Not to scale

Summer drilling

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Arrow RK-14-21 core 209 m

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Arrow RK-14-21 core 318 m

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ARROW RK-14-21 core 519 m

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Arrow Hole RK-14-27 Radioactivity probe results

250.0m

253.8m

RK-14-30 Core 18

Arrow: pitchblende veins within brecciated shear, 478.6 m down-hole

Arrow: pitchblende veins within breccias, 512.8 m down-hole

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Arrow target zone

Exploration Program & Budget A continuous and focused exploration program*

Property Program Timeline Budget ($M)

Rook 1 6000 meters of diamond drilling,

detailed gravity on a small

section of the Dirksen Trend

January – March

2014 $3M

Rook 1 13,500 meters of diamond

drilling, detailed gravity over

priority target grids

Mid May –

September 2014 $7M

*Timing of expenditures subject to seasonal conditions

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Arrow – Highlights

First hole in the target area C, named “Arrow” hits mineralisation

Multiple zones of highly anomalous radioactivity

Of the 3 target areas out of 12 in just the western section of Rook I that have

been drilled - all have U mineralisation

Vastly expanded summer 2014 (13,500meters commencing mid - May)

Applying the geophysical principles of targeting Arrow – there are 9 other targets

areas independent from Arrow that are based on the same methodology

It suggests this S-W section of the Basin is becoming a prolific uranium

district to rival the east

NXE has the most dominant land position in this section of the Basin

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Radio / Thorburn

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Radio Adjacent to Roughrider

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3 4

5

2 1

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Nearby Uranium Deposits1

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3

5

4

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Rio Tinto (Hathor) (100%)

Roughrider 2

Inferred 40.7Mlb @ 11.30% Indicated 17.2Mlb @ 1.98% Areva (69.2%), Denison (25.2%), OURD (5.7%)

Midwest A 3

Inferred 4.3Mlb @ 18.00% Indicated 5.8Mlb @ 0.48% Areva (69.2%), Denison (25.2%), OURD (5.7%)

Midwest Lake 4

Inferred 0.4Mlb @ 0.8% Indicated 42.9Mlb @ 5.5% Cameco (57.5%), Areva (23.1%), JCU (19.5%)

Dawn Lake 5

Indicated 12.9Mlb @ 1.69% Areva (70%), Denison (22.5%), OURD (7.5%)

McClean Lake 6

Inferred 0.1Mlb @ 0.74% Indicated 11.5Mlb @ 2.8% Denison (60%), KEPCO (40%)

J-Zone 7

Inferred 1.5Mlb @ 0.46% Indicated 7.4Mlb @ 1.99%

(1) There is no known uranium mineralisation at the Radio Project. Information regarding adjacent properties is not necessarily indicative of the mineralisation at the Radio Project.

(2) “Preliminary Economic Assessment Technical Report for the East and West Zones Roughrider Uranium Project, Saskatchewan”, 13 Sep 2011; on SEDAR (www.sedar.com) under the profile of Hathor Exploration Limited.

(3) ”Technical Report on the Midwest A Uranium Deposit Saskatchewan, Canada”, 31 Jan 2008, on SEDAR (www.sedar.com) under the profile of Denison Mines Corp.

(4) “Technical Report on the Midwest Uranium Deposit Mineral Resource and Mineral Reserve Estimates Saskatchewan, Canada”, 01 Jun 2005, revised 14 Feb 2006, on SEDAR (www.sedar.com) under the profile of

Denison Mines Inc.

(5) Annual information form for the financial year ended December 31, 2011, on SEDAR (www.sedar.com) under the profile of Cameco Corp.

(6) “Technical Report on the Mineral Resource Estimate for the McClean North Uranium Deposits, Saskatchewan”, 31 Jan 2007, on SEDAR (www.sedar.com) under the profile of Denison Mines Corp.

(7) “Technical report on the Waterbury Lake uranium project including resource estimate on the J Zone uranium deposit, Waterbury Lake property, located in the Athabasca Basin, Northern Saskatchewan”, Feb 29 2012 and

revised May 29, 2012 on SEDAR (www.sedar.com) under the profile of Fission Energy Corp.

~100Mlb indicated & ~50Mlb of inferred resources within a 10km radius of Radio

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Radio

Denison (60%), KEPCO (40%)

J-Zone

Inferred 1.5Mlb @ 0.46% Indicated 7.4Mlb @ 1.99%

Rio Tinto (Hathor) (100%)

Roughrider Inferred 40.7Mlb @ 11.30% Indicated 17.2Mlb @ 1.98%

Areva (69.2%), Denison (25.2%), OURD (5.7%)

Midwest Lake

Inferred 0.4Mlb @ 0.8% Indicated 42.9Mlb @ 5.5%

Cameco (57.5%), Areva (23.1%), JCU (19.5%)

Dawn Lake

Indicated 12.9Mlb @ 1.69%

Adjacent to and covers the extension of the interpreted E-W

structural corridor which hosts the world-class Roughrider deposits

Areva (69.2%), Denison (25.2%), OURD (5.7%)

Midwest A

Inferred 4.3Mlb @ 18.00% Indicated 5.8Mlb @ 0.48%

Areva (69.2%), Denison (25.2%), OURD (5.7%)

Josie

Radio Drill Program

9 holes drilled

Summer 2013

Visual confirmation of the

presence of:

significant bleaching,

desilicification,

clay alteration, structural

disruptions in the overlying

Athabasca sandstone,

and of clay alteration and

structures in the basement

rocks.

All of these features are

known to occur at or in

the vicinity of uranium

mineralization in the

Athabasca Basin

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On Trend with

CAMECO’s

Cigar Lake Mine

and Deposits

Thorburn Lake Property Location

Similarities and Proximity

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Cigar Lake Thorburn Lake

Average Unconformity Depth 430 - 460 m 280 - 350 m

Average Depth to Known Mineralization 410 - 450 m 283 - 381 m

Host Rock Type for Mineralization Sandstone & Graphitic

Pelite Sandstone & Graphitic

Pelite

Thorburn Drilling Highlights to Date

TBN-08-04;

• 487 ppm U from 284.5 - 285.1 m

TBN-11-05A;

• 1,430 ppm U from 288.8 - 289.3 m

• 910 ppm U from 289.3 - 292.0 m

- including 3,610 ppm from 289.3 - 289.9 m

TBN-11-06;

• 432 ppm U from 283.0 - 283.9 m

• 204 ppm U from 283.9 - 285.0 m

TBN-11-13;

• 347 ppm U from 290.4 - 291.4 m

TBN-11-14;

• 232 ppm U from 380.5 - 381.0 m

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* Drill holes with mineralized intercepts are

indicated by red collar markers

Market Comparison (NexGen market comps)

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$75

$541 $654

$2,443

N E X G E N F I S S I O N ( P ATTE R S O N L AK E S O U TH )

H ATH O R ( R O U G H R I D E R ) C I G AR L AK E

MARKET VALUE (C$ MILLION)

Market values are calculated as follows: - NexGen Energy Ltd: At March 28, 2014, 170,025,760 shares outstanding with share price of $0.44 - Fission Uranium Corp : At March 28, 2014, 331,928,461 shares outstanding with share price of $1.63 - Hathor Exploration Ltd / Roughrider Deposit : Total cash paid by Rio Tinto of $654 million to acquire Hathor in January

2012. - Cigar Lake Value is calculated using the imputed value of Rio Tinto's $654 million purchase price of Hathor with 58 million

lbs U3O8, or $11.28/lb U3O8 times Cigar Lake's 216.7 million proven and probable lbs U3O8 as reported by Cameco Corp.

Contact

Investor Relations

604-684-6730 | 1-866-684-6730

NXE@kincommunications.com

Head Office

2450 – 650 W. Georgia Street

Vancouver, BC V6B 4N9

604-428-4112

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