Arrow

Rook 1

IsoEnergy

Southwest Athabasca Basin

NexGen has significant land positions in both the historic eastside and the emerging southwest side of the Athabasca Basin in Saskatchewan, Canada. NexGen holds over 259,000 hectares of land in the southwest part of the Athabasca Basin. The Company's 100%-owned Rook I project hosts the land based Arrow deposit which has an Indicated mineral resource estimate of 179.5Mlbs U3O8 contained within 1.18Mt grading 6.88% U3O8 including a high-grade core of 164.9Mlbs U3O8 contained within 0.40Mt grading 18.84% U3O8 and an Inferred mineral resource estimate of 122.1Mlbs U3O8 contained within 4.25Mt grading 1.30% U3O8 (see the Company's technical disclosure statement: http://www.nexgenenergy.ca/corporate/corporate-governance/). The deposit was based on only 200 drill holes and the Arrow deposit has a defined area of mineralization of 875 m x 280 m, depth starting at 100 m down to 980 m and remains open in most directions and at depth.

Arrow is a 100% land-based, basement-hosted and high-grade uranium discovery which is the largest development-stage uranium deposit in Canada. Additionally, the Company made the “Harpoon” discovery (August 11, 2016), the "Bow" discovery (March 31, 2015) and the Cannon discovery (April 18, 2016) 4.7 km, 3.7 km and 1.3 km northeast of Arrow, respectively. Harpoon is the most significant mineralized area discovered since the discovery of Arrow. The Company remains well-funded to continue its program of expansion and infill drilling the Arrow deposit as well as further drill testing Harpoon, Bow and Cannon as well as other prospective parts of the Rook I property.

IsoEnergy Ltd.

The Company holds a 72% interest in IsoEnergy Ltd. (www.isoenergy.ca) which holds a portfolio off strategically located and prospective assets in the eastern Athabasca Basin including a 100%-interest in the Thorburn Lake project which is located southwest of the Radio property and 7 km east of Cameco's Cigar Lake mine.