Arrow: A Rapidly Growing Uranium Discovery | March 9, 2015

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.

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Project Overview Project Overview Focus High-tonnage, high-grade, technically superior assets in shallow sections of the Athabasca Basin

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Portfolio Characteristics

- Straddles the Basin boundary and shallow sections inside the Basin,

- NexGen’s land package enables us to find basement hosted, unconformity hosted and sandstone hosted

mineralization,

- Hosts the land based Arrow discovery at Rook I,

Arrow Discovery Rook I Project location & Conductor Corridors

- Most dominant land position in the southwest section of the Athabasca Basin

- Arrow discovered

February 2014 - Land based discovery

located inside the Basin boundary

Rook I hosts all the known uranium bearing conductor corridors in the region

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Arrow PDAC 2014 – Just discovered! 4

Arrow Today! 37 from 39 intersected high grade uranium mineralization

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Wide Step out: 90% of holes drilled are angled Area of mineralization: Currently

Length x width - 515 m x 215 m,

Depth - 100 m to 820 m,

Arrow Currently identified two High Grade Shear Zones A2 & A3

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Both high grade shears open in every direction

A2 - 81 meter strike length, - location of AR-14-30,

one of the best drill holes in Athabasca Basin history

A3

- Discovered February 24, 2014,

- AR-15-39, 9.75m off scale (>10,000 to >61,000cps)

Expansion of A2 High Grade Shear Zone

AR-15-38 expands the high grade zone of AR-14-30 to 81 meters to the southwest.

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AR-14-30 Core

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On a composite grade x thickness basis, AR-14-30 ranks as the third best hole ever drilled in the Athabasca Basin

A3 High Grade Shear Zone

February 24, 2015 AR-15-39 discovers new high grade zone in A3 shear zone. 9.75 m Off-scale >10,000 to >61,000cps.

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The Eagle Point Analogy

65 million lbs produced, 20 million lbs reserve, within >200 million lb district

- Eagle Point Uranium 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 is the longest operating uranium mine in North America and is also the second largest uranium mill in the world. - The Rabbit Lake Uranium District has produced more than 190 million pounds of uranium concentrates since production began in 1975 (www.cameco.com/business/uranium-operations/canada/rabbit-lake). - Production at Eagle Point commenced in 1994 and remains in production today.

The Arrow zone is located just inside the present day Athabasca Basin where previously no drill testing has occurred within 4 km along strike to the northeast within the Athabasca Basin, and within 3 km along strike to the southwest outside of the Athabasca Basin.

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Dravite Breccia – Arrow, McArthur River Arrow: AR-14-15 422.25m Dravite associated (or proximal) to mineralization

Dravite-Chlorite-filled Breccias, Direct Association with Mineralization – McArthur River Deposits and BJ Zone

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Rook I – Patterson Conductor Corridor Arrow: multiple target zones (7kms)

Patterson Lake South

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Significant Radon Anomaly discovered coincident with conductor break

Open in all directions along a 7km conductor corridor

Significant Radon Anomaly Discovered 480 m long by 20 to 150 m wide radon in lake water anomaly has been discovered 400 m northeast along strike from the Arrow zone; Radon values up to 10.4 pCi/L are in the same range as the radon values that led to the discovery of the R390E R780E zones at the adjacent PLS property by the Alpha-Fission joint venture (see news release February 19th, 2013); Location of this clustered radon anomaly is optimally situated where the southeast dipping VTEM conductor is projected to reach the unconformity.

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Gravity – Fury Target Area - Six high priority

targets based on the same geophysical signature as Arrow

- Land based

- Depth to basement ranges from 10 to 20 meters

- Drilling commenced late January 2015

Eastern Athabasca Basin Portfolio

High quality portfolio Radio located directly adjacent to and long strike of Roughrider, Rio Tinto acquired for $654M in February 2012 Thorburn Lake (9 of 15 drill holes have intersected uranium mineralization) Madison and 2Z Lake projects contain shallow (<100m thick) sandstone-hosted uranium mineralisation, and is along strike from U-mineralized conductors. The mineralized structures and conductors within 2Z have not been adequately explored, and represent good potential for discovery of new basement-hosted uranium deposits.

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Share Structure

As of March 1, 2015

Shares Issued & Outstanding 195,758,536

Warrants ($0.425 - $0.65) 23,911,666

Options ($0.30 - $0.46) 18,152,303

Fully Diluted 237,822,505

Cash ~$14M

Ownership Tigers Realm Minerals & Associates Mega Uranium Radio Optionors (2 - individually)

~17% ~16%

~7%

TSX-V: NXE

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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

Strong team with a successful track record in

uranium exploration.

Technical Team Garrett Ainsworth VP Exploration & Development

Adam Engdahl Project Manager - Saskatchewan

James Sykes Senior Geologist

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Board Chris McFadden Chairman

Richard Patricio Trevor Thiele Craig Parry Gerry Feldman James Currie Directors

Technical Advisory Andrew Browne former VP Exploration & Development

Craig Parry Director

Arrow Summary

- 37 of 39 holes drilled intercepted mineralization,

- Area of mineralization 515 m x 215 m, vertical extent commencing from 100 m down to 820 m,

- Two High Grade Shear Zones A2 & A3,

- Expansion of A2 High Grade Zone to 81 m

- Well financed $14M,

- 18,000m drilling program at Arrow underway

- Large Radon Anomaly 400 m northeast of Arrow to be drill tested this winter along with other Rook I regional targets identified by geophysics.

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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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