Matribhumi Samachar English
RK-25-232 assays returned NexGen’s best discovery phase intercept to date: 15.0 m at 15.9% U3O8 including 3.0 m at 47.8%, 1.5 m at 29.4% and an intercept of 0.5 m at 68.8%
Ranks among the world’s highest-grade basement-hosted uranium vein intercepts, validating the growing significance of Patterson Corridor East (“PCE”)
Exceptional continuity confirmed, with RK-24-222 intersecting 17.0 m at 3.85% U3O8, located 200 m from RK-25-232
Winter 2025 drill program added 9 new high-grade intercepts, reinforcing the scale and strength of the system
Vancouver, British Columbia–(Newsfile Corp. – May 27, 2025) – NexGen Energy Ltd. (TSX: NXE) (NYSE: NXE) (ASX: NXG) (“NexGen” or the “Company”) is thrilled to announce the Company’s best discovery phase assay results, with 15.0 meters (m) at 15.9% U3O8, including a peak intercept of 0.5 m at an exceptional 68.8% U3O8, in drillhole RK-25-232. Included within this phenomenal intercept is 3.0 m at 47.8% U3O8 and 1.5 m at 29.4% U3O8. This result ranks among the highest-grade basement hosted uranium vein intercepts in the world.
Assay results from two of the best holes drilled to date at PCE, RK-24-222 and RK-25-232, indicate intense high-grade mineralization 200 m apart (Figures 1 and 2, Tables 1 and 2), confirming scale and continuity early in the discovery phase. Winter activity since the last update continued to build momentum, adding 9 new intersections of off-scale (>61,000 cps) mineralization, bringing the total to 13 high-grade intercepts and reinforce confidence in the materiality of this emerging mineralization. Since discovery (see March 11, 2024, news release), 64 drillholes totalling 47,425.9 m have been completed, with 35 intersecting mineralization that remains open in most directions.
Further, RK-24-222 returned 17.0 m at 3.85% U3O8 including 3.0 m at 10.1% U3O8 and an intercept of 0.5 m at 28.2% U3O8 within massive replacement style uranium mineralization. These results are accelerating NexGen’s understanding of the PCE system and shaping the next phase of exploration targeting. Assays at SRC lab continue to see backlogs with NexGen now having received 75% of the 2024 assay results. Remaining will follow as they are received back from the independent lab. Drilling at PCE will resume on June 1st, 2025, and reporting of 2025 assays will be completed on an ongoing basis.
Leigh Curyer, Chief Executive Officer, commented: “Patterson Corridor East has delivered these exceptional assay results. RK-25-232 is an exceptionally high calibre intersection considering the program is very early in the evaluation of PCE.
Identical to Arrow, mineralization at PCE is wholly hosted in competent basement rock and exhibits all the same characteristics of an intense high-grade mineralized system. PCE is only 3.5 km from the future Rook I Project that is in the final Federal approval stage with the CNSC having received Provincial Approval in November 2023.
The scale of 2025 program drilling at PCE underscores NexGen’s commitment to advancing new sources of uranium supply at a time the world is committing to the deployment of nuclear energy. Notably, President Trump last Thursday, signing four executive orders to immediately accelerate the deployment of nuclear energy in the US, with objective of increasing US nuclear energy output from 100GW to 400GW by 2050. The importance of Rook I and the further development of PCE has never been greater to meet the world’s nuclear fuel requirements for the approaching decades.”
Jason Craven, Vice President, Exploration, commented: “These assays received to date confirm advancement of our 3D model of PCE which sets us up for targeting future drill hole locations at PCE. The focus to both expand the overall footprint as well as define and expand the high-grade sub-domains within PCE. Mineralization style and intensity, mirrored with Arrow 3.5 km away, speaks to the broader endowment of the underexplored NexGen portfolio in southwest Athabasca Basin. NexGen provides everyone with the tremendously unique opportunity of building a true tier one mine whilst simultaneously developing the exciting PCE.”
Other Highlights
RK-24-207 returned 9.5 m at 2.91% U3O8 including 0.5 m at 28.2% U3O8, located approximately 79 m from RK-25-232 and 82 m from RK-24-222. RK-25-239 and RK-25-244 intersected 10.3 m containing >10,000 cps including 1.1 m of cumulative >61,000 cps, and 7.5 m containing >10,000 cps including 2.6 m of cumulative >61,000 cps, respectively. Although assays are pending, RK-25-239 and RK-25-244 speak to the consistency of the system and repeatability of uranium mineralization that is further substantiated by the exceptional assay results of RK-25-232 and RK-24-207.
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Table 1: 2025 Assay results received since March 24, 2025 news release to present
Drillhole Unconformity Depth (m) SRC Geoanalytical Results (Cutoff 0.01%) Hole ID Azimuth Dip Total Depth (m) From
(m) To
(m) Width
(m) U3O8
(wt%) RK-25-225330-70684108.6Assays PendingRK-25-226330-70655.5N/A Assays PendingRK-25-227330-70657113.4Assays PendingRK-25-228330-75609117.1Assays PendingRK-25-229350-70681.4113.2Assays PendingRK-25-230330-70598112.5Assays PendingRK-25-231329-69.5885102.7Assays PendingRK-25-232330-70552.4112.538838910.01
392.53963.50.04
40840910.05
409.5413.540.04
414.54150.50.01
426.54281.50.02
431431.50.50.01
433433.50.50.01
43543830.05
440452Assays Pending
4524671515.9
incl.458.5461.5347.8
incl.459.54600.568.8
incl.463.54651.529.4
467542Assays PendingRK-25-233330-70694109.7Assays PendingRK-25-234330-70747113Assays PendingRK-25-235270-70858105.5Assays PendingRK-25-236267-65541129Assays PendingRK-25-237340-70816104.6No Significant Intersections RK-25-238a279-67165123.4No Significant Intersections RK-25-239278-68594123.4Assays PendingRK-25-240270-70893106.1Assays PendingRK-25-241320-71534117.2Assays PendingRK-25-242270-70555124.5Assays PendingRK-25-243276-66579126.8Assays PendingRK-25-244330-70586.6112.4Assays Pending
All depths and intervals are meters downhole, true thicknesses are yet to be determined.Unconformity of ‘N/A’ denotes a lack of visible contact between Athabasca sandstone and basement rock.Maximum internal dilution 2.0 m downhole.Minimum thickness of 0.5 m downhole.Cutoff grade 0.01% U3O8.All depths and intervals are metres downhole, true thicknesses are yet to be determined. Resource modelling in conjunction with an updated mineral resource estimate is required before true thicknesses can be determined.
Table 2: 2024 Assays received since May 29, 2024
Drillhole Unconformity Depth (m) SRC Geoanalytical Results (Cutoff 0.01%) Hole ID Azimuth Dip Total Depth (m) From
(m) To
(m) Width
(m) U3O8
(wt%) RK-24-193310 -70 621 N/A 383.5385.520.06
389.53900.50.09
393.53940.50.02
400.5403.530.03
40640710.03
412.54141.50.03
416.54192.50.18
419.54200.50.81
420.54254.50.23
426.54281.50.18
428.54290.50.06
429.54311.50.51
43243740.73
442.54430.50.08
44945120.16RK-24-194310 -70 420 98.8 No Significant Intersections RK-24-195310 -70 588.0 N/A No Significant Intersections RK-24-196310 -70 841.0 103.4 702704.52.50.90
705.57060.50.02
723.57240.50.05
73173320.35
incl.731.57320.51.19
734.57350.50.01
741741.50.50.24
742.57430.50.01
744.57472.50.25
747.57480.50.03
748.5750.520.09
751751.50.50.01
754.5755.510.01
757757.50.50.07
758758.50.50.02
760.57610.50.01
765.57660.50.03RK-24-197310 -70 792.0 117.7 518518.50.50.01
521522.51.50.02
523.55306.50.97
incl.526.55292.52.26
53153210.02
532.5534.520.03
544545.51.50.01
54655480.61
incl.548.55490.53.97
incl.552.55530.54.53
554.55550.50.01
55655710.01RK-24-198310 -70 743.2 117.3 No Significant Intersections RK-24-199310 -70 807.0 107.1 No Significant Intersections RK-24-200310 -70 804.0 112.6 611611.50.50.03
612612.50.50.01
613613.50.50.03
61962010.01
623623.50.50.02RK-24-201310 -70 939.0 108.9 673.56740.50.03
674.56761.50.07
677.56780.50.02
678.5679.510.04
680.56810.50.02
694.5697.530.09
69869910.01
699.57043.50.04
708708.50.50.03
721.57220.50.01
765.57660.50.03
819819.50.50.03
822.58230.50.02
867.58680.50.01RK-24-202310 -70 1138.2 106.3 886886.50.50.02
887.58880.50.03
895.58960.50.45
92292310.01
926.59270.50.05
927.5928.510.10
931932.51.50.23
933.5934.513.49
incl.934934.50.56.96
936936.50.52.44
943.5944.510.12
951.59520.52.37
966966.50.51.46
967.59680.52.75
976.59770.50.01
980980.50.50.31
981981.50.50.06
98398630.25
996.59970.50.02
997.5998.510.14
1005100720.06
10091009.50.50.01
1016.51017.510.04
1026.51028.520.03RK-24-203310 -70 738.0 103.7 No Significant Intersections RK-24-204290 -70 822.0 110.1 55156390.06
574602210.31
incl.575575.50.51.19
incl.58158211.67
incl.587.55880.51.10RK-24-205320 -70 1032.0 109.1 7427483.50.16
7667765.30.11
779.5780.510.01
783.5795.511.50.14
802808.530.03
853.58540.50.04RK-24-206298 -75 1377.096.5 No Significant Intersections RK-24-207330 -70 801.0 114.9 50450620.05
506.5507.510.03
508508.50.50.03
509510.51.50.05
511511.50.50.01
51451840.09
519535161.83
incl.522531.59.52.91
incl.525525.50.528.2
53653820.62
538.55390.50.09
539.55400.50.01
54054110.88
553.5554.510.03
557.55591.50.02
560560.50.50.01
567.55680.50.05
572.55730.50.03
581.55820.50.04
582.55830.50.01
583.5584.510.03
585.55860.50.12
588588.50.50.01
59559610.03
596.55970.50.01
600.56010.50.01
60360410.02
616.56170.50.03
619619.50.50.06
62662710.03
636636.50.50.01
640640.50.50.01
644645.51.50.03
717.5718.510.12
729730.51.50.46
730.5734Assays PendingRK-24-208310 -70 756 104.3 Assays PendingRK-24-209310 -70 840 110.7 Assays PendingRK-24-210310 -70 1095 102.4 Assays PendingRK-24-211310 -70 1302 103.1 Assays PendingRK-24-212315 -70 137 121 No Significant Intersections RK-24-213310 -70 936 87 No Significant Intersections RK-24-214310 -70 989 111.6 Assays PendingRK-24-215310 -70 840 114.8 Assays PendingRK-24-216310 -70 1071 99.7 78778920.21
789.57911.50.09
790.57910.50.01
791.57920.50.04
80580610.05
807.5808.510.02
811.58120.50.76
814.58172.50.17RK-24-217310 -70 1185 105.6 No Significant Intersections RK-24-217a310 -70 120 105.1 No Significant Intersections RK-24-218310 -70 696 109.6 494.5495.510.03
515.55193.50.09
52052110.01RK-24-219310 -70 1187 99.8 No Significant Intersections RK-24-220310 -70 732 116 445.54471.50.04
450450.50.50.01
452469170.43
incl.457457.50.51.52
incl.457.54580.53.30
incl.462.5463.511.06
incl.465.54660.51.26
469.54700.50.01
471471.50.50.02
475.5488.5130.32
incl.484.54850.51.16
incl.485485.50.52.35
incl.486486.50.52.18
48949450.20
494.5499.550.38
500500.50.50.01
503504.51.50.05
520.55210.50.02
521.55220.50.02
522.55230.50.01
525.5526.510.01
539.55400.50.52
544.55461.50.02
570.55710.50.02
579.55811.50.04
583584.51.50.07
585.55860.50.01
596.5597.510.12
599.56000.50.03RK-24-221310 -70 861.6 115.9 Assays PendingRK-24-222354 -65 753 108.4 587.5604.5Assays Pending
604.5621.5173.85
incl.607610310.1
621.5688Assays PendingRK-24-223345 -66 876106.8 633635.52.51.90
incl.633.56340.58.56
645.5647.521.41
incl.646.5647.512.21
675676.51.50.42
678678.50.50.02
679.56800.50.06
689.5693.540.93
695.56971.50.05
701.57020.50.01
702.57030.50.01
703703.50.50.01
705705.50.50.01
707.57080.50.01
713.57140.50.07
714.5715.510.03
716718.52.50.25
720.5721.510.09
722723.51.51.18
incl.723723.50.52.15
726727.51.50.34
728.5764.5Assays Pending
764.57683.50.57
768.5777.5Assays PendingRK-24-224310 -70 744115.8 493504Assays Pending
50450510.34
505.55093.50.36
509539Assays Pending
All depths and intervals are meters downhole, true thicknesses are yet to be determined.Unconformity of ‘N/A’ denotes a lack of visible contact between Athabasca sandstone and basement rock.Maximum internal dilution 2.0 m downhole.Minimum thickness of 0.5 m downhole.Cutoff grade 0.01% U3O8.All depths and intervals are meters downhole, true thicknesses are yet to be determined. Resource modelling in conjunction with an updated mineral resource estimate is required before true thicknesses can be determined.
Table 4: 2025 Spectrometer results from March 24, 2025 news release to present
DrillholeUnconformity Depth (m)Handheld Spectrometer Results (RS-125)Hole IDAzimuthDipTotal Depth
(m)
From
(m)To
(m)Width
(m)CPS RangeRK-25-235270-70858105.5No Significant Intersections.RK-25-237340-70816.0104.6No Significant Intersections.RK-25-238a279-67165123.4No Significant Intersections.RK-25-239278-68594123.4212.52130.5<500 – 850
3653661<500
390.5391.51<500 – 800
391.53920.5<500 – 2400
392394.52.5<500
394.53950.5<500 – 950
395395.50.5<500 – 800
395.53960.5<500
396396.50.5<500 – 600
396.53970.5500 – 1100
397397.50.5<500
398398.50.5<500 – 700
398.53990.5<500 – 900
400.5402.52<500
405405.50.5<500
406.54070.5<500
407407.50.5700 – 1400
407.54080.5700 – 14000
4084091<500 – 700
409409.50.5<500 – 3100
409.54100.5<500 – 1200
410410.50.5<500 – 700
411411.50.5<500
414414.50.5<500
414.54150.5600 – 800
415415.50.5<500
416.5418.52<500
418.54190.5<500 – 600
419419.50.5<500
419.5420.51<500 – 550
420.5421.51<500
422.54230.5<500
424.54250.5<500
425.54260.5<500
428.5429.51<500
430431.51.5<500
432433.51.5<500
433.54340.5<500 – 650
434434.50.5<500 – 1100
434.54350.5<500
435435.50.5<500 – 600
435.54360.5600 – 2000
436436.50.5700 – 1000
436.54370.52500 – 3500
437437.50.57000 – 31000
437.54380.512000 – 28000
438438.30.317000 – 35000
438.3438.40.1>61000
438.4438.50.117000 – 32000
438.54390.512000 – 49000
439439.50.523000 – 51000
439.54400.530000 – 40000
440440.50.526000 – 41000
440.5440.70.2>61000
440.7440.90.236000 – 50000
440.94410.1>61000
441441.40.4>61000
441.4441.60.230000 – 50000
441.64420.410000 – 46000
442442.50.510000 – 54000
442.54430.53000 – 13000
443443.50.53000 – 45000
443.54440.51500 – 25000
444444.50.52500 – 28000
444.54450.5400 – 1350
445445.50.5<500 – 800
445.54460.5<500 – 700
448449.51.5<500
449.54500.5<500 – 700
450450.50.5<500 – 600
450.54510.5<500 – 700
451451.50.5700 – 3500
451.54520.5500 – 1100
453454.51.5<500
4564571<500
458458.50.5<500
461.54620.5<500
463464.51.5<500
466.54670.5<500
468468.50.5<500 – 550
468.54690.5<500
469.54700.5<500 – 550
470471.51.5<500
471.54720.5<500 – 3200
472472.50.51200 – 11000
472.54730.51100 – 4600
473473.50.5<500
476476.50.5<500
476.54770.5<500 – 600
4774781<500
478478.50.5<500 – 3100
478.54790.5600 – 5000
479479.50.5<500 – 1100
480.5481.51<500
482.54830.5<500
483.54840.5<500
4844851<500 – 550
486486.50.5<500
486.54870.5700 – 2000
487487.50.51000 – 9000
487.54880.5<500 – 1100
490490.50.5<500
490.5490.70.21500 – 4000
490.74910.3>61000
491491.50.51000 – 34000
498498.50.5<500 – 580
498.54990.5<500 – 960
499499.50.5<500 – 2600
499.55000.5<500 – 1200
501.55020.5<500
502.55030.5<500
503.55040.51200 – 57000
504504.50.51200 – 10000
505.55060.5<500 – 800
507.55080.5<500 – 5400
508508.50.51100 – 4500
509.55100.5<500
514.55150.5<500 – 1400
518.55190.5<500
519519.50.5<500 – 600
519.55200.5<500 – 1400RK-25-240270-70893106.1653.5654.51.0<500
658.56590.5<500
659.56600.5<500
660660.50.5<500 – 1000
660.56610.5<500 – 650
661661.50.5<500 – 5400
661.56620.5<500
6626631.0<500 – 1000
663663.50.5<500 – 950
663.56640.5<500 – 800
664664.50.53400 – 19000
664.56650.5<500 – 700
665665.50.5600 – 3300
665.56660.5700 – 33000
666666.50.5500 – 1200
666.56670.5700 – 2200
667667.50.51200 – 2900
667.56680.5<500 – 1200
668668.50.51100 – 8600
668.5669.51.0<500 – 1400
669.56700.5<500
670670.50.51100 – 3900
670.56710.5<500 – 600
671.56720.5<500 – 700
672672.50.5<500 – 1200
673673.50.5<500 – 6000
673.56740.5<500 – 3200
675675.50.5900 – 15000
675.56760.5500 – 1700
676676.50.5500 – 1800
676.56770.5<500 – 1300
677677.50.5<500 – 600
677.56780.5500 – 900
678678.50.5<500 – 1800
678.56790.5<500
679679.50.5600 – 3000
679.56800.5<500
680680.50.5<500 – 550
680.56810.5600 – 1100
681681.50.5600 – 3200
681.56820.5600 – 2300
682682.50.5500 – 600
682.56830.5500 – 700
683683.50.5<500 – 550
683.56840.5<500
684684.50.5700 – 3000
684.56850.53600 – 12000
685685.10.14000 – 8000
685.1685.60.5>61000
685.6685.80.215000 – 20000
685.86860.2>61000
686686.50.51000 – 5500
686.56870.57000 – 47000
687687.50.52200 – 25000
687.56880.51000 – 3800
688688.50.5600 – 1500
688.56890.5<500 – 1000
689689.50.5500 – 700
689.56900.5<500
690690.50.5<500 – 1100
690.56910.51200 – 1500
691691.50.5700 – 1000
691.56920.5800 – 1100
692692.50.5<500 – 800
692.5693.51.0<500
694.56950.5<500
695695.50.5<500 – 750
695.5696.51.0<500 – 800
696.56970.5<500 – 700
697697.50.5<500
697.56980.5<500 – 550
698698.50.51000 – 4600
698.56990.5<500 – 900
699.57000.5500 – 1000
700700.50.5<500 – 1300
700.57032.5<500
703703.50.5<500 – 700
703.57040.5<500 – 550
705.57060.5<500
706706.50.5<500 – 3500
714.57150.5550 – 10000
715715.50.5<500
717.57180.5500 – 1300
718.57223.5<500
726.57270.5<500 – 800
7287302.0<500
730730.50.5<500 – 550
731731.50.5<500
732.57330.51100 – 11000
733733.50.54000 – 7000
733.57340.5<500 – 9000
734734.50.5<500
734.57350.5<500 – 550
735735.50.5<500 – 6100
735.57360.5800 – 25000
736736.50.5<500 – 1500
736.57370.5<500 – 540
7377381.0<500 – 600
738738.50.56000 – 20000
738.57390.5750 – 10000
739739.50.5<500
739.57400.5<500 – 1100
740740.50.5<500 – 600
740.57410.5<500 – 550
741741.50.5600 – 2500
741.57420.5500 – 4600
742742.50.5<500 – 700
742.5742.90.4<500
749.5750.51.0<500
752.57530.5<500 – 900
754.57550.5<500
755755.50.5<500 – 780
755.57560.5<500 – 620
756.57570.5<500 – 520
757759.52.5<500
760760.50.5<500 – 980
760.57610.5530 – 1050
761761.50.5500 – 1800
761.57620.5<500
762762.50.5830 – 8400
762.57630.5530 – 2200
763763.50.5890 – 2700
763.57640.5260 – 1200
764.57650.51000 – 1700
765765.50.5600 – 1900
765.57660.5<500 – 1000
766.57670.5<500 – 850
767767.50.5<500 – 1500
774774.50.52000 – 5000
774.57750.5<500 – 1100
775775.50.51100 – 2700
775.57760.5<500 – 2100
776.57770.5<500 – 1100
778778.50.5<500 – 1100
780780.50.52500 – 7000
798.57990.5<500 – 8400
804.58050.5<500 – 560RK-25-241320-71534117.2396396.50.5<500 – 650
396.53970.5<500
413413.50.5<500 – 850
413.54140.5<500 – 2500
414414.50.5<500 – 800
414.54150.5<500 – 1700
415415.50.5<500
415.54160.5<500
416416.50.5<500 – 6500
416.54170.5<800 – 2000
417417.50.51000 – 3500
417.54180.52000 – 11000
418418.50.53500 – 11000
418.54190.51000 – 6500
419419.50.5<500
421421.50.5<500
423.54240.5<500
424424.50.5<500 – 1500
424.54250.5<500 – 600
425425.50.5<500 – 1100
425.54260.5<500 – 700
426426.50.5<500
427.5428.51.0<500
428.54290.5<500 – 600
432432.50.5<500 – 700
432.54330.5<500
434434.50.5<500
434.54350.5500 – 800
435436.51.5<500
436.54370.5<500 – 700
437437.50.5<500 – 550
437.54380.5<500
438438.50.5<500 – 550
439.54400.5<500 – 550
440440.50.5<500 – 2000
444444.50.5<500 – 900
447.5448.51.0<500
448.54490.5<500 – 1100
449449.50.58000 – 54000
449.54500.515000 – 26000
450450.50.54000 – 15000
450.54510.5<500 – 1500
451451.50.5<500
451.54520.5<500
452452.50.5<500 – 550
452.54541.5<500
454454.50.5500 – 1200
454.54550.5500 – 5000
455455.50.51500 – 34000
455.54560.5500 – 1100
456456.50.5500 – 1500
456.54570.5500 – 1100
461461.50.5<500
462462.50.5<500
462.54630.5<500 – 1000
463463.50.5<500
463.54640.5<500 – 1100
464464.50.5800 – 1200
464.54650.5<500
465465.50.5<500 – 550
466466.50.5<500
467467.50.5<500
471471.50.5<500
489489.50.5<500
496496.50.5<500
497.54980.5<500
498498.50.5<500 – 520
501501.50.5<500 – 850
503503.50.5<500 – 700RK-25-242270-70555.00124.50No Significant Intersections.RK-25-243276-66579.00126.80207.52080.5<500 – 690
208208.50.5<500
360364.54.5<500
365365.50.5<500 – 1000
365.53660.5650 – 1200
366366.50.5<500 – 1200
366.53670.5<500 – 2500
367367.50.5<500 – 4000
367.53680.5<500 – 850
368368.50.51000 – 25000
368.53690.5<500 – 16000
371371.50.5<500 – 800
371.53720.5<500
372372.50.5<500
372.53730.5<500 – 800
373373.50.5<500 – 1000
374374.50.5<500 – 700
375375.50.5<500
376.53770.5<500 – 750
384.53850.5<500 – 900
385385.50.5<500
385.53860.5<500 – 800
386386.50.5<500 – 1000
386.53870.5<500 – 900
387387.50.5<500 – 3500
400.54010.5<500
4024031.0<500
404.54061.5<500
406406.50.5<500 – 1000
406.5407.51.0<500
409409.50.5<500 – 940
409.54100.5<500 – 1900
410410.50.5<500 – 650
410.54110.5<500
411411.50.5<500 – 3900
411.5414.53.0<500
417417.50.5<500 – 800
417.54180.5<500 – 1550
418418.50.5<500 – 850
418.54190.5<500 – 1100
4194201.0<500
421.54220.5<500
422422.50.5<500 – 600
422.54241.5<500
424424.50.5<500 – 1100
424.54250.5600 – 1100
425425.50.51500 – 2400
425.54260.5500 – 2600
426426.50.51100 – 11000
426.54270.5<500
432433.51.5<500
433.54340.5<500 – 550
434434.50.5<500 – 1100
434.54350.5<500 – 580
435435.50.5<500
435.54360.5900 – 1100
436436.50.5<500 – 1300
436.54370.5<500
446.54470.5<500 – 720
452452.50.5<500
453453.50.5<500
453.54540.5<500 – 950
455.54560.5<500 – 660
4564571.0<500
459.5460.51.0<500
472472.50.5<500 – 3200
473473.50.5<500
475475.50.5<500
476.54770.5<500
478478.50.5<500
480480.50.5<500 – 7500
480.54810.5<500 – 650
481481.50.5<500
481.54820.5<500 – 1800
482482.50.5<500
488488.50.5<500
488.54890.5<500 – 4500
489489.50.5<500
489.54900.5<500 – 730
490490.50.5<500 – 1500
490.54910.5<500 – 700
503503.50.5<500 – 1300RK-25-244330-70586.60112.40412412.50.5<500 – 920
412.54130.51100 – 4400
413413.50.5<500 – 620
4144151.0<500
420.54210.5<500
421.54220.5<500 – 780
422422.50.5<500 – 830
422.54230.5<500 – 660
423423.50.5<500 – 950
423.54240.5<500 – 920
424424.50.5<500 – 540
424.54250.5<500
427.54280.5<500
428428.50.5<500 – 6400
428.54290.5<500
430430.50.5<500
434434.50.5<500
453.54540.5<500
4544551.0<500
455455.50.5<500 – 700
455.54560.5<500 – 2400
456.5458.52.0<500
458.54590.5<500 – 1800
459459.50.5<500
462464.52.5<500
464.54650.5<500 – 1900
465465.50.51100 – 3600
465.54660.5910 – 1800
466466.50.5<500 – 1400
466.54670.5880 – 7000
467467.50.5780 – 3500
467.54680.5550 – 700
468468.50.51200 – 17000
468.54690.51500 – 24000
469469.50.5<500 – 1400
469.54700.5<500 – 540
470470.50.5<500 – 830
470.54710.5<500
471471.50.5<500 – 1400
471.54720.5720 – 1600
472472.50.51500 – 13000
472.54730.57000 – 30000
473473.20.220000 – 55000
473.2473.50.3>61000
473.54740.57000 – 40000
474474.50.54500 – 9000
474.54750.51300 – 26000
475475.10.19000 – 26000
475.1475.40.3>61000
475.4475.50.119000 – 41000
475.5477.31.8>61000
477.3477.40.110000 – 15000
477.4477.60.2>61000
477.64780.410000 – 21000
478478.50.5720 – 1500
478.54790.5<500 – 800
4794801.0<500
480480.50.5<500 – 4400
480.54810.5550 – 5100
481481.50.5520 – 5700
481.54820.5600 – 60000
482482.50.5<500 – 750
482.54863.5<500
489.54900.5<500
490490.50.5<500 – 630
490.54910.5<500 – 680
497497.50.5<500
497.54980.5<500 – 710
499499.50.5<500
5105111.0<500
528528.50.5<500
528.55290.5<500 – 1400
529529.50.5700 – 14000
529.55300.5<500 – 7200
530530.50.5<500 – 3200
530.55310.51000 – 5600
531531.50.5<500
All depths and intervals are meters downhole, true thicknesses are yet to be determined.”Off-scale” refers to >61,000 cps (counts per second) readings by gamma spectrometer type RS-125.”Anomalous” means >500 cps readings by gamma spectrometer type RS-120.Where “CPS Range” is <500 cps, this refers to local low radioactivity within the overall interval.Unconformity of ‘N/A’ denotes a lack of visible contact between Athabasca sandstone and basement rock.Maximum internal dilution 2.0 m downhole.All depths and intervals are meters downhole, true thicknesses are yet to be determined. Resource modelling in conjunction with an updated mineral resource estimate is required before true thicknesses can be determined.
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
[email protected]
www.nexgenenergy.ca
Travis McPherson
Chief Commercial Officer
NexGen Energy Ltd.
+1 604 428 4112
[email protected]
www.nexgenenergy.ca
Monica Kras
Vice President, Corporate Development
NexGen Energy Ltd.
+44 7307 191933
[email protected]
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.com ) 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 mineral reserve and mineral resource estimates, the 2021 Arrow Deposit, Rook I Project and estimates of uranium production, grade and long-term average uranium prices, anticipated effects of completed drill results on the Rook I Project, planned work programs, completion of further site investigations and engineering work to support basic engineering of the project 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 state that certain actions, events or results “may”, “could”, “would”, “might” or “will be taken”, “occur” or “be achieved” or the negative connotation thereof. Statements relating to “mineral resources” are deemed to be forward-looking information, as they involve the implied assessment that, based on certain estimates and assumptions, the mineral resources described can be profitably produced in the future.
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 mineral reserve and resources estimates and the key assumptions and parameters on which such estimates are based are as set out in this news release and the technical report for the property , the results of planned exploration activities are as anticipated, the price and market supply of uranium, 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, conclusions of economic valuations, 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 mineral resources and reserves are not as estimated, 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 mineral resources and reserves, 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 Annual Information Form dated March 3, 2025 filed with the securities commissions of all of the provinces of Canada except Quebec and in NexGen’s 40-F filed with the United States Securities and Exchange Commission, which are available on SEDAR+ at www.sedarplus.com and Edgar at www.sec.gov .
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 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.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/253463
