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NexGen Expands High-Grade Subdomain Vertical Extent by 17% to 644 m and Intersects
Continuous Strong Mineralization Across Patterson Corridor East (PCE) while Adding Fifth
Drill to Advance Optimally

Highlights:

Vancouver, BC, August 25, 2026 - NexGen Energy Ltd. ("NexGen" or the "Company") (TSX: NXE) (NYSE: NXE) (ASX: NXG) announces results from the early portion of 2026 summer drilling at PCE which expanded the high-grade subdomain both up and down dip while continuing to demonstrate strong internal continuity of intense high-grade mineralization (Figures 1 and 2, Table 1).

High-grade uranium mineralization now extends to 930 m with hole RK-26-293 intersecting cumulative 4.7 m of >10,000 cps including 0.1 m of >61,000 cps.  This hole expanded the vertical extent by 94 m, a 17% increase to 644 m. This zone of intense mineralization is accompanied by strong, broad hydrothermal alteration with notable potential for additional mineralized continuation nearby and below (Figures 1 and 2). The strike extent remains at 210 m as recent tests primarily focused on confirmation of deep-seated interpretations.


RK-26-290c1 designed as a down-plunge test in hole delivered a dual purpose as a test across the full extent of the previous known mineralized footprint of PCE in order to understand the geometry, continuity and extents of high-grade zones within the overall mineralization. This hole intersected multiple stacked uranium veins across 40 m of the high-grade subdomain with cumulative 19.5 m of >10,000 cps including 12.9 m of >10,000 cps that surrounds 5.2 m of >61,000 cps.  This is the best hole to date at PCE based on >61,000 cps. Advancement of the model was optimized with confirmation of interpretations as well as critical identification of repeating, mineralization-controlling structural disruptions.

RK-26-294 delivered confirmation of strong internal continuity of intense mineralization intersecting cumulative 6.9 m of >10,000 cps including 3.1 m of >61,000 cps located 27 m along strike of RK-24-222 (17.0 m at 3.85% U3O8)  (Figures 1 to 4).  Together with RK-26-290c1, these holes combined represent the two best holes drilled to date in 2026.

Additional new drilling shown in Figures 1 and 2, and Table 1, tested the mineralized extents and key areas within the high-grade subdomain. These holes provided crucial geological orientation information that influences extents of the model, in particular the high-grade component. An example being RK-26-296 with cumulative 3.5 m of >10,000 cps including 0.4 m of >61,000 cps that expanded the shallowest portion of PCE by 50 m along strike. Overall, the bulk of high-grade subdomain mineralization at PCE is 70 m shallower than the A2 High-Grade (HG) Zone.

Jason Craven, Vice President of Exploration, commented: "Growth of the high-grade subdomain continues to exceed expectations with expansions across the areas of focus with mineralization still open in most directions. Establishing clear connectivity between intense high-grade intersections with RK-26-290c1 and RK-26-294, which both hit broad zones of intense uranium mineralization is a material advancement of this discovery. In addition, RK-26-293 is extremely exciting as it has expanded the high-grade subdomain by 94 m and opened this area up for potential high-impact growth of this high-grade mineralization."

Leigh Curyer, Chief Executive Officer, commented: "Given today's results at PCE, the team is adding a fifth drill rig for the remainder of the 2026 program. In parallel, with construction of the Rook I Project, the team is delivering on multiple fronts and simultaneously expanding the long-term growth profile of NexGen as a world leader in the provision of this key energy fuel."

Drilling at PCE recommenced on May 28, 2026 and to date in 2026 a total of 20,138.7 m has been completed of the planned 42,000 m, focusing on high-grade growth and expansion of mineralization. Eleven drillholes this summer totalling 7,425.2 m have further tested the mineralization at PCE. NexGen has added a fifth drill rig to continue to advance this uranium discovery optimally. Additional tests of the parallel trend at PCE are planned as part of the remainder of summer drilling. Samples from 2026 drilling are continuously submitted to the independent Saskatchewan Research Council Geoanalytical Laboratory (SRC), with results to follow.


Figure 1: Interpreted 3D model of PCE shown looking northwest (across strike) and northeast (along strike); RK-26-290c1, RK-26-293,
and RK-26-294 intersections outlined in purple; mineralization remains open, particularly below entire high-grade subdomain

Figure 2: Interpreted model of mineralization at PCE (as of this release); new holes emphasized by larger diameter pierce points and
bold labels with the trace of down plunge test in dashed black; view is a long section that looks perpendicular to the primary
mineralized plane; total mineralized footprint in orange and the high-grade subdomains in red


Figure 3: Core photo from RK-26-294 displays cumulative 3.1 m of off-scale (>61,000 cps) uranium mineralization between 656.9
and 665.4 m down hole; yellow outlines >1,000 cps, red outlines >10,000 cps, >61,000 cps outlined in purple


Figure 4: Core photo from RK-26-290c1 displays cumulative 5.2 m of off-scale (>61,000 cps) uranium mineralization between 451.4
and 491.4 m down hole; yellow outlines >1,000 cps, red outlines >10,000 cps, >61,000 cps outlined in purple


Table 1: Spectrometer results since April 22, 2026 release

Drillhole Unconformity
Depth (m)
Handheld Spectrometer Results (RS-125)
Hole ID Azim
uth
Dip Total
Depth
(m)
From (m) To (m) Width (m) CPS Range
RK-26-285c1 275 -72 858 N/A 791.5 792.0 0.5 <500 - 670
          794.5 795.0 0.5 <500
          796.0 797.0 1.0 <500
          797.0 797.5 0.5 5600 - 41000
          797.5 797.6 0.1 11000 - 31000
          797.6 797.7 0.1 >61000
          797.7 798.0 0.3 11000 - 31000
          798.0 798.5 0.5 1400 - 4160
          798.5 799.0 0.5 800 - 4200
          799.0 799.5 0.5 <500 - 570
          799.5 800.0 0.5 <500 - 1250
          800.0 800.5 0.5 1150 - 3980
          800.5 801.0 0.5 680 - 1110
          801.0 801.5 0.5 <500 - 1120
          801.5 802.0 0.5 510 - 780
          802.0 802.5 0.5 <500 - 1500
          802.5 803.0 0.5 <500 - 530
          803.0 803.5 0.5 <500 - 530
          803.5 804.0 0.5 800 - 3250
          804.0 804.5 0.5 860 - 4020
          804.5 805.0 0.5 770 - 2120
          805.0 805.5 0.5 870 - 2140
          805.5 806.0 0.5 <500 - 2560
          806.0 806.5 0.5 910 - 2660
          806.5 807.0 0.5 <500 - 4700
          807.0 807.5 0.5 <500 - 670
          807.5 808.0 0.5 <500 - 4730
          808.0 808.5 0.5 <500 - 7210
          808.5 809.0 0.5 3700 - 10000
          809.0 809.5 0.5 920 - 4450
          810.0 810.5 0.5 <500
          810.5 811.0 0.5 <500 - 640
          811.0 811.5 0.5 510 - 1080



          811.5 812.5 1.0 <500
          812.5 813.0 0.5 <500 - 1850
          813.0 813.5 0.5 <500
          823.0 823.5 0.5 <500 - 2550
RK-26-290 59 -75 519 N/A 338.0 338.5 0.5 <500 - 710
          338.5 339.0 0.5 <500 - 700
          346.0 346.5 0.5 <500
          346.5 347.0 0.5 <500 - 900
          347.0 347.5 0.5 <500 - 960
          353.5 354.0 0.5 <500
          355.0 356.0 1.0 <500
          356.0 356.5 0.5 <500 - 750
          356.5 357.0 0.5 <500 - 780
          357.0 357.5 0.5 <500 - 530
          357.5 358.0 0.5 <500 - 620
          358.0 358.5 0.5 1000 - 3300
          358.5 359.0 0.5 <500 - 940
          359.0 359.5 0.5 <500 - 1400
          360.0 360.5 0.5 <500 - 1100
          360.5 361.0 0.5 1030 - 11000
          361.0 361.5 0.5 <500 - 1250
          362.5 363.0 0.5 <500
          363.0 363.5 0.5 <500 - 1100
          363.5 364.0 0.5 <500 - 880
          364.0 364.5 0.5 <500
          364.5 365.0 0.5 <500 - 1080
          365.0 365.5 0.5 870 - 3500
          365.5 366.0 0.5 630 - 1570
          366.0 366.5 0.5 850 - 1750
          366.5 367.0 0.5 630 - 2770
          367.0 367.5 0.5 <500 - 5300
          367.5 368.0 0.5 <500 - 810
          368.0 369.0 1.0 <500
          369.0 369.5 0.5 <500 - 890
          369.5 370.0 0.5 <500 - 770
          370.0 370.5 0.5 <500 - 530
          371.5 372.0 0.5 <500
          372.0 372.5 0.5 <500 - 1020



          372.5 374.5 2.0 <500
          378.5 379.0 0.5 <500 - 1800
          379.0 379.5 0.5 <500 - 2040
          379.5 380.0 0.5 <500 - 510
          380.0 380.5 0.5 <500 - 550
          381.0 381.5 0.5 <500 - 680
          382.0 383.0 1.0 <500
          383.0 383.5 0.5 <500 - 860
          383.5 384.0 0.5 <500
          384.0 384.5 0.5 <500 - 540
          384.5 385.0 0.5 <500
          387.5 388.5 1.0 <500
          389.0 385.5 0.5 <500
          392.5 393.0 0.5 <500 - 1160
          393.0 393.5 0.5 <500
          395.5 396.0 0.5 <500
          397.0 397.5 0.5 <500 - 660
          397.5 398.0 0.5 <500
          404.5 405.0 0.5 <500
          406.0 406.5 0.5 <500
          414.0 414.5 0.5 <500 - 770
          414.5 415.5 1.0 <500
          416.0 416.5 0.5 <500
          416.5 417.0 0.5 <500 - 640
          417.0 417.5 0.5 <500
          417.5 418.0 0.5 <500 - 620
          418.0 418.5 0.5 <500 - 760
          418.5 419.0 0.5 <500
          419.0 419.5 0.5 <500 - 920
          419.5 420.5 1.0 <500
          427.0 427.5 0.5 <500
          428.0 429.0 1.0 <500
          429.5 430.0 0.5 <500 - 680
          430.0 430.5 0.5 590 - 3140
          430.5 431.0 0.5 <500 - 1770
          431.0 432.5 1.5 <500
          433.0 434.5 1.5 <500
          435.5 436.0 0.5 <500



          436.0 436.5 0.5 <500 - 760
          436.5 437.0 0.5 <500 - 930
          444.5 445.0 0.5 <500 - 640
          445.0 445.5 0.5 <500 - 730
          445.5 446.5 1.0 <500
          447.0 447.5 0.5 <500 - 720
          447.5 448.0 0.5 <500 - 1190
          448.0 448.5 0.5 <500 - 3050
          448.5 449.5 1.0 <500
          450.5 451.0 0.5 <500
          451.0 451.5 0.5 <500 - 690
          451.5 452.0 0.5 <500
          453.0 453.5 0.5 <500
          462.5 463.0 0.5 <500
          465.5 466.0 0.5 <500
          466.0 466.5 0.5 <500 - 1420
          466.5 467.0 0.5 <500 - 1220
          481.0 481.5 0.5 <500
RK-26-290c1 61 -74 1242 N/A 334.5 335.0 0.5 <500
          335.5 336.0 0.5 <500
          342.0 342.5 0.5 600 - 1500
          342.5 343.0 0.5 <500 - 600
          343.0 343.5 0.5 <500 - 600
          343.5 344.5 1.0 <500
          344.5 345.0 0.5 1000 - 7000
          345.0 345.5 0.5 <500 - 600
          345.5 346.0 0.5 1000 - 10000
          346.0 346.5 0.5 700 - 5000
          346.5 347.0 0.5 <500 - 2200
          349.5 350.0 0.5 <500
          350.0 350.5 0.5 <500 - 600
          350.5 351.0 0.5 <500 - 700
          351.0 351.5 0.5 <500 - 700
          354.5 355.0 0.5 <500
          355.5 356.5 1.0 <500
          357.5 359.0 1.5 <500
          359.0 359.5 0.5 700 - 1400
          359.5 360.0 0.5 1000 - 6000



          360.0 360.5 0.5 500 - 10000
          360.5 362.0 1.5 <500
          362.0 362.5 0.5 <500 - 700
          363.0 363.5 0.5 <500 - 1800
          364.0 364.5 0.5 <500 - 600
          364.5 365.0 0.5 <500
          365.5 366.5 1.0 <500
          367.0 368.5 1.5 <500
          368.5 369.0 0.5 <500 - 800
          369.0 369.5 0.5 500 - 750
          369.5 370.0 0.5 <500
          371.0 373.0 2.0 <500
          375.0 375.5 0.5 <500
          376.5 377.5 1.0 <500
          378.0 379.5 1.5 <500
          408.0 408.5 0.5 <500
          426.5 427.0 0.5 <500 - 1200
          429.5 430.0 0.5 <500 - 12100
          430.0 430.5 0.5 <500
          430.5 431.0 0.5 <500 - 620
          431.0 432.0 1.0 <500
          432.0 432.5 0.5 <500 - 710
          432.5 433.0 0.5 <500 - 910
          433.0 433.5 0.5 <500 - 580
          440.0 441.0 1.0 <500
          445.0 445.5 0.5 <500
          447.0 447.5 0.5 <500
          448.0 449.0 1.0 <500
          449.0 449.5 0.5 <500 - 600
          449.5 450.0 0.5 <500
          450.5 451.0 0.5 <500 - 700
          451.5 452.0 0.5 <500 - 8000
          452.0 452.5 0.5 9000 - 35400
          452.5 452.7 0.2 >61000
          452.7 453.0 0.3 8000 - 11000
          453.0 454.1 1.1 >61000
          454.1 454.5 0.4 5000 - 51000
          454.5 455.0 0.5 500 - 1800



          455.0 455.5 0.5 2600 - 5200
          455.5 456.0 0.5 1200 - 16100
          456.0 456.5 0.5 1300 - 22500
          456.5 457.0 0.5 6200 - 17500
          457.0 457.5 0.5 7000 - 40000
          457.5 458.0 0.5 8000 - 29000
          458.0 458.5 0.5 5000 - 26000
          458.5 459.0 0.5 1900 - 14800
          459.0 459.5 0.5 1400 - 6200
          459.5 460.0 0.5 1600 - 8300
          460.0 460.5 0.5 2100 - 7900
          460.5 461.0 0.5 600 - 17400
          461.0 461.5 0.5 2100 - 21100
          461.5 462.0 0.5 500 - 3900
          462.0 462.5 0.5 2100 - 6800
          462.5 463.0 0.5 <500 - 580
          463.0 463.5 0.5 800 - 2600
          463.5 464.5 1.0 <500
          464.5 465.0 0.5 <500 - 600
          465.0 465.5 0.5 <500 - 1600
          465.5 466.0 0.5 2100 - 16100
          466.0 466.5 0.5 1200 - 4500
          466.5 467.0 0.5 2100 - 5300
          467.0 467.5 0.5 2700 - 5100
          467.5 468.0 0.5 <500 - 1300
          468.0 468.5 0.5 <500 - 1100
          468.5 469.0 0.5 <500 - 1200
          469.0 469.5 0.5 700 - 7100
          469.5 470.0 0.5 <500 - 1300
          470.0 470.5 0.5 <500
          470.5 471.0 0.5 1500 - 6500
          471.0 471.5 0.5 <500 - 12300
          471.5 473.6 2.1 >61000
          473.6 474.0 0.4 1400 - 14000
          474.0 474.5 0.5 <500
          474.5 475.0 0.5 <500 - 4100
          475.0 475.5 0.5 <500
          475.5 476.0 0.5 <500 - 700



          476.0 476.5 0.5 <500
          476.5 477.0 0.5 <500 - 14400
          477.0 477.5 0.5 <500 - 5100
          477.5 478.0 0.5 <500 - 21000
          478.0 478.5 0.5 <500
          478.5 479.0 0.5 <500 - 1300
          479.0 479.5 0.5 <500 - 990
          479.5 480.0 0.5 <500 - 780
          480.0 480.5 0.5 1400 - 3400
          480.5 480.6 0.1 >61000
          480.6 480.8 0.2 700 - 11200
          480.8 482.5 1.7 >61000
          482.5 483.0 0.5 1700 - 27700
          483.0 483.5 0.5 <500
          483.5 484.0 0.5 5200 - 8200
          484.0 484.5 0.5 900 - 11700
          484.5 485.0 0.5 1200 - 3700
          485.0 485.5 0.5 1200 - 41100
          485.5 486.0 0.5 <500 - 2740
          486.0 486.5 0.5 500 - 12000
          486.5 487.0 0.5 530 - 41600
          487.0 487.5 0.5 2000 - 9100
          487.5 488.0 0.5 <500 - 11200
          488.5 489.0 0.5 <500 - 1900
          489.0 489.5 0.5 <500 - 1200
          489.5 490.0 0.5 <500
          490.0 490.5 0.5 <500 - 3000
          490.5 491.0 0.5 <500 - 520
          491.0 492.0 1.0 <500
          493.0 493.5 0.5 <500
          494.5 495.0 0.5 <500
          495.0 495.5 0.5 <500 - 540
          495.5 496.0 0.5 <500 - 1200
          496.0 496.5 0.5 <500 - 840
          496.5 497.0 0.5 <500
          497.5 498.5 1.0 <500
          499.0 499.5 0.5 <500
          499.5 500.0 0.5 <500 - 690



          500.0 500.5 0.5 <500 - 670
          500.5 501.0 0.5 <500 - 2100
          501.0 501.5 0.5 <500 - 820
          508.5 509.0 0.5 <500
          509.0 509.5 0.5 <500 - 780
          509.5 510.0 0.5 <500
          512.0 513.0 1.0 <500
          513.5 514.5 1.0 <500
          518.5 519.0 0.5 <500
          520.0 520.5 0.5 <500 - 1300
          571.5 572.0 0.5 <500
          572.0 572.5 0.5 <500 - 610
          572.5 573.0 0.5 <500
          574.0 574.5 0.5 <500
          635.5 636.0 0.5 <500
          882.5 883.0 0.5 <500 - 670
          886.0 886.5 0.5 <500
          887.5 888.0 0.5 <500 - 2040
          894.0 896.0 2.0 <500
          896.5 897.0 0.5 <500
          903.5 904.0 0.5 580 - 1650
          904.0 904.5 0.5 540 - 1010
          904.5 905.0 0.5 600 - 1340
          905.0 905.5 0.5 <500
          905.5 906.0 0.5 <500
          907.5 908.5 1.0 <500
          908.5 909.0 0.5 <500 - 600
          910.0 910.5 0.5 <500 - 1210
          910.5 911.0 0.5 <500 - 1150
          916.5 917.0 0.5 <500 - 730
          919.0 919.5 0.5 <500
          920.0 924.0 4.0 <500
          924.0 924.5 0.5 <500 - 600
          927.0 927.5 0.5 <500 - 520
          944.5 945.0 0.5 <500 - 800
          945.0 945.5 0.5 <500 - 580
          945.5 946.0 0.5 <500 - 530
          948.5 949.0 0.5 <500



          952.5 953.0 0.5 <500 - 520
          953.0 953.5 0.5 <500
          953.5 954.0 0.5 <500 - 1100
          954.0 954.5 0.5 <500 - 1500
          956.0 956.5 0.5 <500
          959.5 960.0 0.5 <500 - 840
          960.0 960.5 0.5 <500
          965.0 965.5 0.5 <500
          966.0 966.5 0.5 <500 - 1040
          966.5 967.5 1.0 <500
          969.0 969.5 0.5 <500
          970.0 970.5 0.5 <500 - 930
          970.5 971.0 0.5 <500
          972.5 973.0 0.5 <500
          977.0 977.5 0.5 <500 - 520
          977.5 978.0 0.5 670 - 2100
          978.0 979.0 1.0 <500
          979.0 979.5 0.5 <500 - 720
          979.5 980.0 0.5 <500
          980.5 981.0 0.5 <500
          986.5 987.5 1.0 <500
          999.0 999.5 0.5 <500
          999.5 1000.0 0.5 <500 - 680
          1005.0 1005.5 0.5 <500 - 2700
          1005.5 1006.0 0.5 <500
          1009.0 1009.5 0.5 <500 - 650
          1011.0 1011.5 0.5 <500
          1011.5 1012.0 0.5 <500 - 720
          1013.5 1014.0 0.5 1000 - 2900
          1014.0 1014.5 0.5 <500 - 2300
          1015.5 1016.0 0.5 <500 - 720
          1016.0 1016.5 0.5 <500
          1016.5 1017.0 0.5 <500 - 630
          1017.5 1018.0 0.5 <500
          1018.0 1018.5 0.5 <500 - 970
          1018.5 1019.0 0.5 <500 - 630
          1024.5 1025.0 0.5 <500
          1025.0 1025.5 0.5 <500 - 1150



          1025.5 1026.0 0.5 <500 - 840
          1026.0 1026.5 0.5 <500
          1028.0 1028.5 0.5 <500 - 620
          1030.0 1030.5 0.5 <500
          1075.5 1076.0 0.5 <500 - 540
          1082.5 1083.0 0.5 <500 - 900
          1083.5 1084.0 0.5 <500
          1084.0 1084.5 0.5 <500 - 1000
          1084.5 1085.0 0.5 <500 - 1600
          1089.5 1090.0 0.5 <500
          1090.0 1090.5 0.5 <500 - 1200
          1090.5 1091.0 0.5 <500 - 1400
          1091.0 1091.5 0.5 2300 - 9500
          1091.5 1092.0 0.5 <500 - 5900
          1092.0 1092.5 0.5 <500 - 1900
          1092.5 1093.0 0.5 <500 - 890
          1093.0 1093.5 0.5 <500 - 1100
          1093.5 1094.5 1.0 <500
          1095.5 1096.0 0.5 <500 - 510
          1096.0 1096.5 0.5 <500 - 750
          1096.5 1097.5 1.0 <500
          1097.5 1098.0 0.5 1200 - 2600
          1098.0 1099.0 1.0 <500
          1099.5 1100.0 0.5 <500 - 700
          1100.0 1100.5 0.5 <500
          1100.5 1101.0 0.5 <500 - 900
          1101.0 1101.5 0.5 <500 - 1400
          1101.5 1102.0 0.5 <500 - 1300
          1102.0 1102.5 0.5 2200 - 34000
          1102.5 1103.0 0.5 1100 - 20200
          1103.0 1103.5 0.5 900 - 7900
          1103.5 1104.0 0.5 500 - 1500
          1104.0 1104.5 0.5 <500
          1104.5 1105.0 0.5 <500 - 650
          1105.0 1107.0 2.0 <500
          1107.0 1107.5 0.5 <500 - 1400
          1107.5 1108.0 0.5 <500 - 800
          1108.0 1108.5 0.5 <500 - 650



          1108.5 1109.0 0.5 <500 - 580
          1109.0 1109.5 0.5 <500 - 870
          1109.5 1110.0 0.5 <500 - 570
          1110.0 1111.0 1.0 <500
          1111.0 1111.5 0.5 <500 - 660
          1111.5 1112.0 0.5 <500 - 570
          1112.0 1112.5 0.5 <500 - 2400
          1112.5 1113.0 0.5 <500 - 1100
          1113.0 1114.0 1.0 <500
          1116.0 1117.5 1.5 <500
          1117.5 1118.0 0.5 550 - 6500
          1118.0 1118.5 0.5 <500 - 1100
          1118.5 1119.0 0.5 <500
          1120.0 1120.5 0.5 <500
          1126.5 1127.0 0.5 <500
          1138.5 1139.0 0.5 <500
          1140.5 1141.0 0.5 <500 - 520
          1141.0 1141.5 0.5 <500
          1147.5 1148.0 0.5 <500 - 2000
          1176.0 1176.5 0.5 <500 - 2300
          1176.5 1177.0 0.5 <500
          1182.0 1182.5 0.5 <500 - 870
          1183.0 1183.5 0.5 <500
RK-26-291 59 -70 345 N/A 327.5 328.5 1.0 <500
          329.5 330.0 0.5 <500
RK-26-292 87 -75 465 111.1 172.0 172.5 0.5 <500
          173.5 174.0 0.5 <500
          174.0 174.5 0.5 <500 - 580
          174.5 175.0 0.5 <500
          187.0 187.5 0.5 <500
          201.0 202.0 1.0 <500
          203.0 203.5 0.5 <500
          203.5 204.0 0.5 <500 - 3200
          204.0 204.5 0.5 <500 - 650
          204.5 205.0 0.5 <500 - 2500
          205.0 205.5 0.5 <500 - 1000
          205.5 206.5 1.0 <500
          211.0 211.5 0.5 <500



          211.5 212.0 0.5 <500 - 780
          215.0 215.5 0.5 <500 - 710
          215.5 216.0 0.5 <500
          235.5 236.5 1.0 <500
          237.5 238.0 0.5 <500
          243.5 244.0 0.5 <500
          244.0 244.5 0.5 <500 - 750
          246.5 247.0 0.5 <500 - 700
          247.0 248.0 1.0 <500
          282.5 283.0 0.5 <500
          284.5 286.0 1.5 <500
          287.0 287.5 0.5 <500
          287.5 288.0 0.5 500 - 1200
          288.0 288.5 0.5 <500 - 560
          288.5 289.5 1.0 <500
          289.5 290.0 0.5 <500 - 600
          290.0 291.0 1.0 <500
          296.0 296.5 0.5 <500
          296.5 297.0 0.5 <500 - 600
          300.0 300.5 0.5 <500 - 550
          301.0 301.5 0.5 <500 - 610
          302.0 302.5 0.5 <500
          302.5 303.0 0.5 <500 - 1100
          303.5 304.0 0.5 <500
          304.0 304.5 0.5 <500 - 580
          304.5 305.0 0.5 <500 - 670
          305.0 305.5 0.5 <500
          306.0 306.5 0.5 <500
          306.5 307.0 0.5 <500 - 550
          307.5 308.0 0.5 <500 - 740
          308.0 308.5 0.5 <500
          308.5 309.0 0.5 <500 - 1140
          309.0 309.5 0.5 <500 - 1500
          309.5 310.0 0.5 <500 - 1000
          310.0 311.0 1.0 <500
          311.0 311.5 0.5 <500 - 680
          311.5 312.5 1.0 <500
          312.5 313.0 0.5 <500 - 650



          319.0 319.5 0.5 <500 - 3080
          319.5 320.0 0.5 <500 - 1070
          320.0 320.5 0.5 500 - 1890
          320.5 321.0 0.5 <500
          321.5 322.0 0.5 <500
          333.5 334.0 0.5 <500
          335.5 336.0 0.5 <500
          336.5 337.0 0.5 <500
          337.5 338.0 0.5 <500
          338.5 339.0 0.5 <500
          339.0 339.5 0.5 880 - 11000
          339.5 340.0 0.5 1500 - 5080
          340.0 340.5 0.5 <500 - 750
          340.5 341.0 0.5 <500
          341.5 342.0 0.5 <500
          342.5 343.0 0.5 <500
          349.5 350.0 0.5 <500
          355.0 355.5 0.5 <500 - 680
          357.5 358.0 0.5 <500 - 920
          358.0 358.5 0.5 <500
          358.5 359.0 0.5 <500 - 580
          359.0 359.5 0.5 <500 - 1320
          367.5 368.5 1.0 <500
          369.5 370.0 0.5 <500
          384.0 384.5 0.5 <500
          386.0 386.5 0.5 <500
          387.0 390.0 3.0 <500
          390.0 390.5 0.5 <500 - 520
          390.5 391.0 0.5 <500 - 650
          391.0 391.5 0.5 <500
          394.5 395.0 0.5 <500
          395.5 396.0 0.5 <500
          399.0 399.5 0.5 600 - 5200
          403.5 404.0 0.5 <500 - 1100
          404.0 404.5 0.5 640 - 900
          404.5 405.0 0.5 <500 - 920
          405.0 405.5 0.5 <500
          405.5 406.0 0.5 <500 - 700



          407.0 407.5 0.5 <500 - 1300
          407.5 408.0 0.5 <500
          408.5 409.5 1.0 <500
          415.5 416.0 0.5 <500 - 650
          416.0 417.0 1.0 <500
          422.0 423.0 1.0 <500
          423.0 423.5 0.5 520 - 1250
          423.5 424.0 0.5 1400 - 9000
          424.0 424.5 0.5 1800 - 12600
          424.5 426.0 1.5 <500
          426.5 428.5 2.0 <500
          430.0 430.5 0.5 <500 - 2000
          430.5 431.0 0.5 <500 - 670
          431.0 431.5 0.5 <500 - 1200
RK-26-293 272 -70 1104 110.7 957.0 957.5 0.5 <500 - 700
          980.0 980.5 0.5 <500 - 750
          980.5 981.0 0.5 1000 - 6300
          982.0 990.5 8.5 <500
          998.0 998.5 0.5 <500 - 2300
          998.5 999.5 1.0 <500
          999.5 1000.0 0.5 <500 - 2000
          1000.5 1001.0 0.5 <500 - 1000
          1001.0 1001.5 0.5 <500
          1001.5 1002.0 0.5 500 - 10000
          1002.0 1002.5 0.5 500 - 600
          1002.5 1003.0 0.5 <500
          1003.0 1003.5 0.5 800 - 1000
          1003.5 1004.0 0.5 500 - 10200
          1004.0 1004.5 0.5 <500 - 700
          1004.5 1005.0 0.5 <500
          1005.0 1005.5 0.5 <500 - 1000
          1005.5 1006.0 0.5 920 - 24500
          1006.0 1006.5 0.5 <500 - 750
          1006.5 1007.5 1.0 <500
          1007.5 1008.0 0.5 2000 - 58000
          1008.0 1008.5 0.5 2200 - 6500
          1008.5 1009.0 0.5 <500 - 10100
          1010.0 1010.5 0.5 <500 - 720



          1010.5 1011.0 0.5 3300 - 38000
          1011.0 1011.5 0.5 9000 - 35000
          1011.5 1012.0 0.5 1300 - 28000
          1012.0 1012.5 0.5 <500 - 920
          1012.5 1012.6 0.1 19000 - 50000
          1012.6 1012.7 0.1 >61000
          1012.7 1013.0 0.3 1700 - 8000
          1013.0 1014.0 1.0 <500
          1017.5 1018.0 0.5 <500 - 1070
          1018.0 1018.5 0.5 <500 - 940
          1018.5 1019.0 0.5 <500 - 5200
          1021.0 1021.5 0.5 970 - 8000
          1021.5 1022.0 0.5 620 - 7200
          1022.0 1022.5 0.5 <500 - 6670
          1022.5 1023.0 0.5 540 - 6500
          1023.0 1023.5 0.5 <500 - 1600
          1023.5 1024.0 0.5 <500 - 1740
          1024.0 1024.5 0.5 <500 - 1020
          1024.5 1025.0 0.5 500 - 7000
          1025.0 1025.5 0.5 600 - 1500
          1025.5 1026.0 0.5 <500 - 600
          1026.0 1026.5 0.5 700 - 5000
          1026.5 1027.0 0.5 1000 - 7000
          1027.0 1027.5 0.5 1000 - 5000
          1027.5 1028.0 0.5 <500 - 6000
          1028.0 1028.5 0.5 <500 - 3000
          1028.5 1029.0 0.5 <500
          1029.0 1029.5 0.5 <500 - 1000
          1029.5 1030.0 0.5 <500 - 700
          1030.0 1030.5 0.5 <500
          1030.5 1031.0 0.5 <500 - 1300
          1031.0 1031.5 0.5 900 - 4000
          1031.5 1032.0 0.5 900 - 8000
          1032.0 1032.5 0.5 4000 - 8000
          1032.5 1033.0 0.5 <500 - 800
          1033.0 1033.5 0.5 <500
          1033.5 1034.0 0.5 <500 - 2400
          1034.0 1034.5 0.5 1000 - 5000



          1034.5 1035.0 0.5 1200 - 4400
          1035.0 1035.5 0.5 <500 - 740
          1035.5 1036.0 0.5 <500 - 4500
          1036.0 1036.5 0.5 740 - 5600
          1036.5 1037.0 0.5 <500 - 610
          1037.0 1037.5 0.5 <500 - 540
          1037.5 1038.0 0.5 <500 - 2300
          1038.0 1039.5 1.5 <500
          1039.5 1040.0 0.5 <500 - 3800
          1040.0 1040.5 0.5 1700 - 4000
          1040.5 1041.0 0.5 900 - 3000
          1041.0 1041.5 0.5 <500
          1041.5 1042.0 0.5 1500 - 14000
          1042.0 1042.5 0.5 500 - 1700
          1042.5 1043.0 0.5 <500 - 550
          1043.0 1043.5 0.5 <500 - 530
          1043.5 1044.0 0.5 700 - 2300
          1049.0 1049.5 0.5 <500 - 810
          1049.5 1050.0 0.5 <500
          1050.0 1050.5 0.5 <500 - 580
          1050.5 1051.0 0.5 <500 - 1400
          1051.5 1052.0 0.5 <500
          1052.0 1052.5 0.5 <500 - 890
          1052.5 1053.0 0.5 <500
          1053.0 1053.5 0.5 <500 - 1800
          1053.5 1054.0 0.5 <500
          1058.0 1058.5 0.5 <500 - 750
          1058.5 1059.0 0.5 <500
          1065.5 1066.0 0.5 <500
RK-26-294 293 -60 813 113.8 645.0 645.5 0.5 <500 - 730
          645.5 646.0 0.5 <500 - 580
          646.0 647.0 1.0 <500
          647.0 647.5 0.5 <500 - 670
          647.5 650.0 2.5 <500
          650.0 650.5 0.5 <500 - 650
          652.0 652.5 0.5 500 - 5000
          652.5 653.0 0.5 580 - 1600
          653.0 653.5 0.5 <500 - 620



          653.5 655.0 1.5 <500
          655.0 655.5 0.5 <500 - 650
          655.5 656.0 0.5 5400 - 16000
          656.0 656.5 0.5 1500 - 10000
          656.5 656.9 0.4 15000 - 55000
          656.9 658.4 1.5 >61000
          658.4 658.5 0.1 17000 - 25000
          658.5 658.8 0.3 600 - 15000
          658.8 659.0 0.2 >61000
          659.0 659.5 0.5 7000 - 55000
          659.5 660.0 0.5 2000 - 5300
          660.0 660.5 0.5 <500 - 2300
          660.5 661.0 0.5 <500
          661.0 661.5 0.5 <500 - 1050
          661.5 662.6 1.1 <500
          662.6 662.7 0.1 >61000
          662.7 663.0 0.3 <500
          663.0 663.5 0.5 <500 - 17900
          663.5 663.8 0.3 >61000
          663.8 663.9 0.1 900 - 1200
          663.9 664.2 0.3 >61000
          664.2 664.3 0.1 10000 - 20000
          664.3 664.6 0.3 >61000
          664.6 664.9 0.3 5800 - 41800
          664.9 665.0 0.1 >61000
          665.0 665.1 0.1 29500 - 56000
          665.1 665.4 0.3 >61000
          665.4 665.5 0.1 900 - 1200
          665.5 666.0 0.5 2100 - 31300
          666.0 666.5 0.5 <500 - 1200
          666.5 667.0 0.5 <500 - 1200
          667.0 667.5 0.5 1200 - 6000
          667.5 668.0 0.5 <500 - 1200
          668.0 670.5 2.5 <500
          670.5 671.0 0.5 <500 - 900
          671.0 671.5 0.5 <500 - 1100
          671.5 672.0 0.5 800 - 8500
          672.0 672.5 0.5 <500



          674.0 674.5 0.5 <500
          674.5 675.0 0.5 <500 - 600
          675.0 676.0 1.0 <500
          678.5 679.5 1.0 <500
          679.5 680.0 0.5 <500 - 620
          721.5 722.0 0.5 <500 - 2300
          742.5 743.0 0.5 <500 - 910
          743.0 743.5 0.5 500 - 2600
          743.5 744.0 0.5 <500
RK-26-294c1 293 -60 537 N/A No Significant Intersections
RK-26-294c2 293 -60 768 N/A 643.5 644.0 0.5 <500 - 650
          644.0 644.5 0.5 <500
          644.5 645.0 0.5 <500 - 12000
          658.0 658.5 0.5 <500 - 1700
          666.0 667.0 1.0 <500
          675.5 676.0 0.5 <500 - 1000
          677.0 677.5 0.5 <500 - 2100
          677.5 678.5 0.5 <500
          678.5 679.0 0.5 <500 - 650
          679.0 679.5 0.5 <500 - 800
          679.5 680.0 0.5 <500 - 15800
          680.0 680.5 0.5 <500 - 11000
          680.5 681.0 0.5 600 - 5150
          681.0 681.5 0.5 500 - 3600
          681.5 682.0 0.5 <500 - 2800
          682.0 682.5 0.5 <500
          683.0 683.5 0.5 <500 - 900
          683.5 684.0 0.5 <500 - 8300
          684.0 684.5 0.5 <500 - 1300
          684.5 685.0 0.5 500 - 5100
          685.0 685.5 0.5 <500
          687.5 688.0 0.5 <500 - 3400
          689.0 689.5 0.5 <500
          689.5 690.0 0.5 <500 - 1000
          691.0 691.5 0.5 <500 - 1050
          691.5 692.0 0.5 <500
          692.0 692.5 0.5 <500 - 5600
          692.5 693.0 0.5 <500 - 1300



          693.0 693.5 0.5 <500 - 5650
          693.5 694.0 0.5 1650 - 8700
          694.0 694.5 0.5 2600 - 56400
          694.5 695.0 0.5 3200 - 13800
          695.0 695.5 0.5 600 - 13800
          695.5 696.0 0.5 600 - 6300
          696.0 696.5 0.5 <500 - 900
          697.0 697.5 0.5 <500 - 4000
          698.0 698.5 0.5 650 - 7500
          698.5 699.0 0.5 2600 - 11000
          699.0 699.5 0.5 2200 - 26700
          699.5 700.0 0.5 600 - 13600
          700.0 700.5 0.5 <500 - 680
          700.5 701.5 0.5 <500
          701.5 702.0 0.5 <500 - 940
          702.0 702.5 0.5 1100 - 4000
          703.5 704.0 0.5 <500 - 5200
          704.0 704.5 0.5 <500 - 54000
          721.0 721.5 0.5 <500 - 3200
          722.5 723.0 0.5 <500
          735.5 736.0 0.5 <500 - 2100
          755.0 755.5 0.5 <500
RK-26-295 265 -65 519 117.0 No Significant Intersections
RK-26-296 69 -73 546 104.9 322.0 322.5 0.5 <500
          323.0 323.5 0.5 <500
          333.0 333.5 0.5 <500 - 600
          333.5 334.0 0.5 <500
          340.0 340.5 0.5 <500
          352.5 353.0 0.5 <500
          354.5 355.0 0.5 <500
          355.0 355.5 0.5 <500 - 700
          355.5 356.0 0.5 <500 - 700
          356.0 357.0 1.0 <500
          370.0 370.5 0.5 <500
          370.5 371.0 0.5 <500 - 1100
          371.5 372.0 0.5 <500 - 2000
          372.0 372.5 0.5 <500 - 1100
          372.5 373.0 0.5 <500 - 900



          373.0 373.5 0.5 <500 - 1000
          373.5 374.5 1.0 <500
          374.5 375.0 0.5 <500 - 600
          375.0 376.0 1.0 <500
          376.0 376.5 0.5 <500 - 4800
          376.5 377.0 0.5 500 - 12500
          377.0 377.5 0.5 800 - 6800
          377.5 378.0 0.5 600 - 2100
          378.0 378.5 0.5 <500 - 3100
          378.5 379.0 0.5 <500 - 2500
          389.5 391.0 1.5 <500
          392.0 392.5 0.5 <500 - 800
          393.5 394.5 1.0 <500
          408.5 409.0 0.5 <500
          409.5 410.0 0.5 <500
          417.0 417.5 0.5 <500 - 850
          417.5 418.0 0.5 <500
          420.5 421.0 0.5 <500
          421.0 421.5 0.5 <500 - 1200
          421.5 422.0 0.5 <500
          423.5 425.0 1.5 <500
          425.0 425.5 0.5 1000 - 6900
          425.5 426.0 0.5 <500 - 730
          426.0 426.5 0.5 <500
          426.5 427.0 0.5 <500 - 700
          427.0 427.5 0.5 5000 - 30000
          427.5 427.9 0.4 >61000
          427.9 428.0 0.1 29200 - 34000
          428.0 428.5 0.5 10000 - 20000
          428.5 429.0 0.5 6300 - 46000
          429.0 429.5 0.5 4500 - 28000
          429.5 430.0 0.5 2500 - 10200
          430.0 430.5 0.5 <500 - 3100
          430.5 431.0 0.5 <500 - 1150
          431.0 432.0 1.0 <500
          438.5 439.0 0.5 <500
          439.5 440.0 0.5 <500 - 520
          440.0 441.0 1.0 <500



          441.0 441.5 0.5 <500 - 700
          441.5 442.0 0.5 <500
          442.0 442.5 0.5 600 - 1800
          442.5 443.0 0.5 <500 - 650
          444.0 445.0 1.0 <500
          445.0 445.5 0.5 600 - 1100
          445.5 446.0 0.5 <500 - 1250
          446.0 446.5 0.5 <500 - 550
          446.5 449.5 3.0 <500
          449.5 450.0 0.5 500 - 2000
          450.0 450.5 0.5 <500 - 750
          450.5 451.0 0.5 <500 - 650
          451.0 451.5 0.5 <500 - 800
          451.5 452.0 0.5 <500 - 780
          452.0 452.5 0.5 <500
          452.5 453.0 0.5 <500 - 1250
          453.0 454.0 1.0 <500
          471.5 472.0 0.5 <500 - 800
          472.0 472.5 0.5 600 - 1750
          472.5 473.0 0.5 700 - 3300
          473.0 473.5 0.5 650 - 1420
          473.5 474.0 0.5 <500 - 800
          474.0 474.5 0.5 <500 - 1350
          474.5 475.0 0.5 <500
          495.5 496.0 0.5 <500 - 520
          496.0 496.5 0.5 <500 - 760
          496.5 497.0 0.5 <500
          503.0 503.5 0.5 <500 - 530
          503.5 504.0 0.5 <500 - 840
          512.0 512.5 0.5 <500
          513.0 514.0 1.0 <500
          517.0 518.0 1.0 <500
          518.0 518.5 0.5 <500 - 810
          518.5 520.5 2.0 <500
          540.5 541 0.5 <500 - 1100
          544.5 545 0.5 <500

About NexGen

NexGen Energy is a Canadian company focused on delivering clean energy fuel for the future.  The Company's flagship Rook I Project is being optimally developed into the largest low-cost producing uranium mine globally, incorporating the most elite environmental and social governance standards.  The Rook I Project is supported by an N.I. 43-101 compliant Feasibility Study, which outlines the elite environmental performance and industry-leading economics. NexGen is led by a team of experienced uranium and mining industry professionals with expertise across the entire mining life cycle, including exploration, financing, project engineering and construction, operations and closure.  NexGen is leveraging its proven experience to deliver a Project that leads the entire mining industry socially, technically and environmentally.  The Project and prospective portfolio in northern Saskatchewan will provide generational, long-term economic, environmental, and social benefits for Saskatchewan, Canada, and the world.             
 

NexGen is listed on the Toronto Stock Exchange, the New York Stock Exchange under the ticker symbol "NXE," and on the Australian Securities Exchange under the ticker symbol "NXG," providing access to global investors to participate in NexGen's mission of solving three major global challenges in decarbonization, energy security and access to power.  The Company is headquartered in Vancouver, British Columbia, with its primary operations office in Saskatoon, Saskatchewan.

Contact Information

Leigh Curyer

Chief Executive Officer
NexGen Energy Ltd.

+1 604 428 4112
lcuryer@nxe-energy.ca

www.nexgenenergy.ca

Travis McPherson

Chief Commercial Officer

NexGen Energy Ltd.

+1 604 428 4112

tmcpherson@nxe-energy.ca 

www.nexgenenergy.ca

Monica Kras

Vice President, Corporate Development

NexGen Energy Ltd.

+44 7307 191933

mkras@nxe-energy.ca
www.nexgenenergy.ca


Technical Disclosure*

All technical information in this news release has been reviewed and approved by Jason Craven, NexGen's Vice President, Exploration, a qualified person under National Instrument 43-101.

Natural gamma radiation in drill core reported in this news release was measured in counts per second (cps) using a Radiation Solutions Inc. RS-125 gamma spectrometer. The reader is cautioned that total count gamma readings may not be directly or uniformly related to uranium grades of the rock sample measured; they should be used only as a preliminary indication of the presence of radioactive minerals.

A technical report in respect of the FS is filed on SEDAR (www.sedarplus.ca) and EDGAR (www.sec.gov/edgar.shtml) and is available for review on NexGen Energy's website (www.nexgenenergy.ca).

Cautionary Note to U.S. Investors

This news release includes Mineral Reserves and Mineral Resources classification terms that comply with reporting standards in Canada and the Mineral Reserves and the Mineral Resources estimates are made in accordance with NI 43-101. NI 43-101 is a rule developed by the Canadian Securities Administrators that establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. These standards differ from the requirements of the Securities and Exchange Commission ("SEC") set by the SEC's rules that are applicable to domestic United States reporting companies. Consequently, Mineral Reserves and Mineral Resources information included in this news release is not comparable to similar information that would generally be disclosed by domestic U.S. reporting companies subject to the reporting and disclosure requirements of the SEC Accordingly, information concerning mineral deposits set forth herein may not be comparable with information made public by companies that report in accordance with U.S. standards.

Forward-Looking Information

The information contained herein contains "forward-looking statements" within the meaning of applicable United States securities laws and regulations and "forward-looking information" within the meaning of applicable Canadian securities legislation. "Forward-looking information" includes, but is not limited to, statements with respect to PCE mineralization, scale and grade, the anticipated effects of completed drill results on PCE, the addition of a fifth drill rig at PCE, completion of the 2026 summer drilling program at PCE, receipt and release of the results and expected outcomes. Generally, but not always, forward-looking information and statements can be identified by the use of words such as "plans", "expects", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "believes" or the negative connotation thereof or variations of such words and phrases or statements that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved or the negative connotation thereof.

Forward-looking information and statements are based on the then current expectations, beliefs, assumptions, estimates and forecasts about NexGen's business and the industry and markets in which it operates. Forward-looking information and statements are made based upon numerous assumptions, including, among others, that the results of planned exploration activities are as anticipated, the cost of planned exploration activities, that financing will be available if and when needed and on reasonable terms, that third party contractors, equipment, supplies and governmental and other approvals required to conduct NexGen's planned exploration activities will be available on reasonable terms and in a timely manner and that general business and economic conditions will not change in a material adverse manner. Although the assumptions made by the Company in providing forward looking information or making forward looking statements are considered reasonable by management at the time, there can be no assurance that such assumptions will prove to be accurate in the future.


Forward-looking information and statements also involve known and unknown risks and uncertainties and other factors, which may cause actual results, performances and achievements of NexGen to differ materially from any projections of results, performances and achievements of NexGen expressed or implied by such forward-looking information or statements, including, among others, the existence of negative operating cash flow and dependence on third party financing, uncertainty of the availability of additional financing, the risk that pending assay results will not confirm previously announced preliminary results, the risk that actual results of exploration activities will be different than anticipated, the cost of labour, equipment or materials will increase more than expected, that the future price of uranium will decline or otherwise not rise to an economic level, the appeal of alternate sources of energy to uranium-produced energy, that the Canadian dollar will strengthen against the U.S. dollar, that actual costs or actual results of reclamation activities are greater than expected, that changes in project parameters and plans continue to be refined and may result in increased costs, of unexpected variations in grade or recovery rates or other risks generally associated with mining, unanticipated delays in obtaining governmental, regulatory or First Nations approvals, risks related to First Nations title and consultation, reliance upon key management and other personnel, deficiencies in the Company's title to its properties, uninsurable risks, failure to manage conflicts of interest, failure to obtain or maintain required permits and licences, risks related to changes in laws, regulations, policy and public perception, as well as those factors or other risks as more fully described in NexGen's most recently filed Annual Information Form and NexGen's annual report on Form 40-F filed with the United States Securities and Exchange Commission, which are available on SEDAR+ and EDGAR.

Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in the forward-looking information or statements or implied by the forward-looking information or statements, there may be other factors that cause results not to be as anticipated, estimated or intended. Readers are cautioned not to place undue reliance on forward-looking information or statements due to the inherent uncertainty thereof.

There can be no assurance that forward-looking information and statements will prove to be accurate, as actual results and future events could differ materially from those anticipated, estimated or intended. Accordingly, readers should not place undue reliance on forward-looking statements or information. The Company undertakes no obligation to update or reissue forward-looking information as a result of new information or events except as required by applicable securities laws.