Announcement PDF Western Mines Group Ltd (WMG or Company) (ASX:WMG) is pleased to update shareholders on the progress of our Phase 5 drilling program and geochemical assay results recently received for shallow diamond hole MTD031 at the Mulga Tank Project, on the Minigwal Greenstone Belt, in Western Australia’s Eastern Goldfields. Fuel availability has been significantly relieved and smoother progress of the Phase 5 drilling program has resumed. The Company has recently completed drilling a diamond tail to hole MTRC001 and three RC infill holes MTRC073 to MTRC075. The rig has just finished the next batch of 10 mud rotary pre-collars and has switched back RC to begin drilling these holes this week. Assay results have been received for shallow diamond hole MTD031 which was part of the Phase 4 infill drilling program in the main body of the Mulga Tank Complex. Results from the hole highlight a broad intersection of essentially continuous nickel sulphide mineralisation with elevated Ni and high S, and showed further intervals with higher grade results. The hole returned 230.2m at 0.30% Ni, 131ppm Co, 104ppm Cu from 90m, including intersections of 6m at 1.02% Ni, 366ppm Co, 303ppm Cu from 259m and 8m at 0.81% Ni, 269ppm Co, 340ppm Cu from 298m, with 1m at 1.44% Ni, 498ppm Co, 0.17% Cu, 0.11g/t Pt+Pd from 300m and 1m at 1.83% Ni, 539ppm Co and 371ppm Cu from 304m. ASX:WMG www.westernmines.com.au 1 Western Mines Group Ltd Unit 10 448 Roberts Road Subiaco WA 6008 HIGHLIGHTS • Geochemical assay results received for shallow diamond hole MTD031 at Mulga Tank • MTD031 showed near continuous zone of nickel sulphide mineralisation - elevated Ni and high S coincident with highly anomalous Cu and PGE: MTD031 230.2m at 0.30% Ni, 131ppm Co, 104ppm Cu, 19ppb Pt+Pd from 90m S:Ni 1.3* • Two higher grade intersections were encountered: MTD031 6m at 1.02% Ni, 366ppm Co, 303ppm Cu, 33ppb Pt+Pd from 259m 8m at 0.81% Ni, 269ppm Co, 340ppm Cu, 26ppb Pt+Pd from 298m inc. 1m at 1.44% Ni, 498ppm Co, 0.17% Cu, 0.11g/t Pt+Pd from 300m and inc. 1m at 1.83% Ni, 539ppm Co, 371ppm Cu, 55ppb Pt+Pd from 304m • Drilling programs ongoing with fuel availability relieved - recent completion of MTRC001 diamond tail and RC holes MTRC073 to MTRC075 • Rig has completed mud rotary pre-collaring the next batch of 10 Phase 5 holes and has commenced drilling these this week • Backlog of sampling cleared with samples up to hole MTRC075 delivered to the lab FURTHER HIGH-GRADE RESULTS FROM MULGA TANK ASX RELEASE 25 MAY 2026 Telephone: +61 475 116 798 Email: contact@westernmines.com.au Shares on Issue: 113.80m Share Price: $0.17 Market Cap: $19.35m Cash: $2.43m (31/03/26) MTD031 was part of a group of Phase 4 holes that aimed to infill previous drilling within the current resource. Numerous intervals of visually logged disseminated nickel sulphide mineralisation coinciding with assay results showing elevated Ni and S, in combination with highly anomalous Cu and PGE, include: MTD031 230.2m at 0.30% Ni, 131ppm Co, 104ppm Cu, 2ppb Pt+Pd from 90m S:Ni 1.3* inc. 7m at 0.48% Ni, 212ppm Co, 397ppm Cu, 28ppb Pt+Pd from 199m and inc. 6m at 1.02% Ni, 366ppm Co, 303ppm Cu, 33ppb Pt+Pd from 259m and inc. 8m at 0.81% Ni, 269ppm Co, 340ppm Cu, 26ppb Pt+Pd from 298m that inc. 1m at 1.44% Ni, 498ppm Co, 0.17% Cu, 0.11g/t Pt+Pd from 300m and that inc. 1m at 1.83% Ni, 539ppm Co, 371ppm Cu, 55ppb Pt+Pd from 304m * Ending in mineralisation Commenting on the results and Phase 5 drilling, WMG Managing Director Dr Caedmon Marriott said: “The Phase 5 drilling program at Mulga Tank is now operating in a smoother fashion having overcome a series of issues and fuel availability is greatly relieved. We’ve completed a number of the outstanding RC infill holes along the southern fence with holes MTRC073 to MTRC075 and also drilled a diamond tail to Phase 1 RC hole MTRC001, again chasing the up-dip continuation of the enriched deeper zones seen in MTD028 and MTRC011. We’ve recently received assay for results for hole MTD031. This was part of the Phase 4 southern fence but drilled as diamond to conserve fuel. Assay results show an essentially continuous intersection of mineralisation, with high S and elevated Ni and chalcophiles down the hole. The results returned 230m at 0.30% Ni with a couple of higher grade horizons of over 1% Ni, including 6m at 1.02% Ni and second lower zone with multiple individual metres of ~1.5 to ~1.8% Ni. These two enriched horizons at the bases of magma pulses or flows have been seen in number of holes in the southern area of the main body of the Complex and can be traced over 100’s of metres. They are a very interesting target for relatively shallow zones of high-grade material if richer and thicker zones of this mineralisation can be found. The MTRC001 diamond tail is another hole testing the basal contact on the relatively shallower western margin of the Mulga Tank Complex and is chasing the up-dip continuation of the two enriched basal zones seen in nearby holes MTD028 and MTRC011 tail. The combination of previous RC assay results and initial diamond core pXRF results from the hole show the now familiar pattern of mineralised sulphide horizons sandwiched around two less mineralised zones within bottom ~800m basal sequence of the Complex. The pXRF results for the lower mineralised basal zone show high sulphur but a broad depleted nickel zone indicating this area of the Complex may be sitting downstream of nickel sulphide accumulating event within this layer or horizon. The Company has planned five RC holes in the SW corner of the Complex as part of the Phase 5 program hoping to target the near surface expression and up-dip continuation of these enriched zones for what could be +0.40% starter pit material.” ASX:WMG www.westernmines.com.au 2 ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK MULGA TANK DRILLING PROGRAMS Exploration results from the Company’s various drilling programs at the Mulga Tank Project have demonstrated significant nickel sulphide mineralisation and an extensive nickel sulphide mineral system within the Mulga Tank Ultramafic Complex. WMG has undertaken a combination of both diamond and reverse circulation (RC) drilling. With this two pronged approach, RC is used to infill and prove up the extent of shallow disseminated nickel sulphide mineralisation, defined by the Company’s recent Mineral Resource Estimate (ASX, Mulga Tank Mineral Resource Over 5Mt Contained Nickel, 10 April 2025), whilst the diamond drilling program continues to test deeper targets for basal massive sulphide. Hole MTD031 was part of the Phase 4 program designed to infill within the current mineral resource estimate and extend it towards the south. ASX:WMG www.westernmines.com.au 3 Figure 1: Assay results for MTD031 and status of current drilling plans ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK HIGH MGO ADCUMULATE DUNITE Assay results for MTD031 averaged 47.1% MgO and 0.45% Al2O3 (volatile free) over the 236.3m ultramafic portion of the hole. Using Al2O3 as a proxy for interstitial material and MgO as a proxy for temperature, geochemical characterisation shows the host rock to be nearly entirely high-temperature, adcumulate to extreme adcumulate dunite with Al2O3 generally between 0.1% and 0.5% and MgO greater than 40%. The observation of extensive intersections of high MgO adcumulate dunite within the Complex, starting essentially immediately under the sand cover, has positive implications for the targeting of large volume, low grade Type 2 Mt-Keith style disseminated nickel sulphide deposits within the Mulga Tank Complex. NICKEL SULPHIDE MINERALISATION In the absence of magmatic sulphide processes nickel is incorporated into olivine during crystallisation and essentially trapped within the dunite host rock. Whereas, in “live” sulphur saturated mineral systems the nickel will partition into potentially “recoverable” nickel sulphide form. The Company uses a number of elements, such as Cu and PGE’s (Pt and Pd), that have high affinity for sulphide (chalcophile), in combination with S (and the S:Ni ratio) as geochemical indicators to confirm the presence of active magmatic sulphide processes and the geochemical signature of nickel sulphide mineralisation. The geochemical assay results for MTD031 demonstrate significant evidence for “live” magmatic sulphide chemical processes and show a fairly continuous zone of highly anomalous Cu and PGE’s in combination with elevated S, and a S:Ni ratio greater than 0.5. These anomalous zones provide strong evidence for nickel sulphide mineralisation and were generally defined by a combination of the various geochemical indicators and cut-off grades (Ni >0.15% and S >0.1%; Cu >20ppm, Pt+Pd >20ppb and S:Ni >0.5), with only minimal inclusion of unmineralised material below mineable width. MTD031 230.2m at 0.30% Ni, 131ppm Co, 104ppm Cu, 2ppb Pt+Pd from 90m S:Ni 1.3* inc. 7m at 0.48% Ni, 212ppm Co, 397ppm Cu, 28ppb Pt+Pd from 199m and inc. 6m at 1.02% Ni, 366ppm Co, 303ppm Cu, 33ppb Pt+Pd from 259m and inc. 8m at 0.81% Ni, 269ppm Co, 340ppm Cu, 26ppb Pt+Pd from 298m that inc. 1m at 1.44% Ni, 498ppm Co, 0.17% Cu, 0.11g/t Pt+Pd from 300m and that inc. 1m at 1.83% Ni, 539ppm Co, 371ppm Cu, 55ppb Pt+Pd from 304m * Ending in mineralisation ASX:WMG www.westernmines.com.au 4 Figure 2: MTD031 Cu and Pt+Pd ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK HOLE MTRC001 DIAMOND TAIL Hole MTRC001 was originally drilled in October 2023 as part of the westernmost fence of the Company’s Phase 1 RC program (along with holes MTRC010, MTRC011 and MTCR012). The hole is located ~900m SSW of diamond hole MTD028 and ~600m S of MTRC011 diamond tail. Hole MTD028 returned an intersection of 140m at 0.49% Ni from 874m, including 82m at 0.55% Ni from 886m, in a zone of possible Perseverance-like “cloud sulphide”, containing multiple high-grade sulphide segregations, above the basal contact (ASX, MTD028 Disseminated Nickel Sulphide 140m at 0.49% Ni, 31 October 2023); whilst hole MTRC011 demonstrated a second upper enriched mineralised zone intersecting 128m at 0.39% Ni from 490m, including 36m at 0.50% Ni from 494m (ASX, MTRC011 128m at 0.39% Ni inc. 36m at 0.50% Ni, 5 February 2026). The MTRC001 diamond tail aimed to step further south from holes MTD028 and MTRC011 and again test the basal contact of the Complex in this area, chasing the up-dip continuation of the two enriched basal zones. The diamond tail extension was drilled from 444m to a total depth of 895m and intersected ~400m of variably serpentinised and talc-carbonate altered high MgO adcumulate dunite ultramafic (444-855.4m), before encountering a footwall of basalt and silicified shales at 855.4m depth (855.4-895m) (Appendix - Table 4). Disseminated magmatic sulphides (trace to 2%) were observed at numerous intervals down the hole, cumulatively over around 200m. In a number of places the disseminated sulphides coalesce into interstitial blebs (3 to 8% sulphide) between former olivine crystals (Appendix - Table 5). Corresponding pXRF readings of Ni, with elevated Cu and S, support the likelihood of this being disseminated magmatic nickel sulphide mineralisation. A number of intersections of high-tenor nickel sulphide immiscible globules and semi-massive sulphide segregations were observed towards the base of the hole similar to those seen in MTD028 and MTRC011, including the familiar ~20-40m zone of sulphide “jellyfish” pockets. These sulphide globules and segregations clearly demonstrate all the conditions and processes are present to form basal massive sulphide accumulations within the Mulga Tank Complex. ASX:WMG www.westernmines.com.au 5 Figure 3: MTD031 S:Ni Ratio ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK ASX:WMG www.westernmines.com.au 6 ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK MTRC001 NQ2 Core 2” Diameter MTRC001 NQ2 Core 2” Diameter Figure 4: Photos showing examples of sulphide segregations and coarse sulphides in hole MTRC001 Note: core is NQ2 being 2 inches or 50mm diameter Depth: 739m Depth: 750.4m Cautionary statement on visible sulphides Mineralogical work on a limited number of samples from previous diamond holes has confirmed disseminated pentlandite mineralisation within the Mulga Tank Complex. A number of spot pXRF readings on larger sulphide blebs has confirmed nickel presence and aids visual identification of pentlandite, however, this may not be valid for finer grained sulphides. However, descriptions of visible sulphides should never be considered a proxy or substitute for laboratory analysis. Only subsequent laboratory geochemical assay can be used to determine the widths and grade of mineralisation. WMG will update shareholders when laboratory results become available. Cautionary statement on pXRF pXRF data is used as an exploration tool and a guide only and should never be considered a proxy or substitute for laboratory analysis. The measurements recorded are for a single spot location and may not be representative of the whole rock. Only subsequent laboratory geochemical assay can be used to determine the widths and grade of mineralisation. WMG will update shareholders when laboratory results become available. MTRC001 DOWN HOLE pXRF The Company is methodically using a portable X-ray fluorescence (pXRF) device on site as part of its exploration and geochemical vectoring approach during the drilling program. Spot pXRF readings for hole MTRC01 have been taken at 50cm intervals down the core from 444m depth. This data is processed using WMG’s in-house techniques and used to confirm the presence of working magmatic mineral processes and lithogeochemical vectors to aid further exploration. Processed pXRF data from MTRC001 is presented below (Figure 5). In general the pXRF data confirms the rock to be high MgO, adcumulate dunite down the length of the hole. The mean average Ni value across at total of 828 readings taken over the logged ultramafic portions of the hole was 0.27% Ni, with individual spot values of up to 6.6% Ni where high tenor sulphide segregations were tested. A number of factors such as S, Cu and Ni content suggest the potential for a significant working nickel sulphide mineral system in this area with broad sections of high MgO, S, Cu and Ni results. Significant trends within the pXRF results (and subsequent assay results) are beginning to be discerned and able to be correlated between the deep diamond holes drilled so far (MTD023, MTD026, MTD027 and MTD028), starting to reveal the architecture of the Mulga Tank Ultramafic Complex. It is cautioned that spot pXRF readings may not be representative of the whole rock and only subsequent laboratory geochemical assay will determine widths and grade of mineralisation. STATUS OF CURRENT DRILLING The Phase 5 drilling program (ASX, Mulga Tank Phase 5 Drilling Plans, 9 February 2026) is once again progressing well after overcoming various issues and a shortage of diesel availability. The Company has planned 25 holes within the main body of the Complex with a key focus of the Phase 5 program being looking for higher grade resource tonnes. Having completed the MTRC001 diamond tail and RC holes MTRC073 to MTRC075 the rig has mud-rotary pre-collared the next batch of 10 holes that commenced drilling this week: • 6 holes (2 x diamond, 4 x RC) - Follow-up on high-grade +1-2% Ni results around holes MTRC032, MTRC038 and MTRC046 (ASX, MTRC046 Two High-Grade Zones inc. 5m at 1.92% Ni 0.21% Cu, 17 September 2024) • 4 of 7 RC holes - Follow-up on shallow +0.40% Ni results around hole MTRC066 (ASX, MTRC066 Best RC Hole to Date at Mulga Tank, 18 September 2025) After completing these holes the second half of the program will include: • Remaining 3 of 7 RC holes - Follow-up on shallow +0.40% Ni results around hole MTRC066 (ASX, MTRC066 Best RC Hole to Date at Mulga Tank, 18 September 2025) • 5 RC holes - Testing new areas in the SW of the Complex up-dip from richer basal zones for shallow broad +100m +0.40% Ni (ASX, MTRC011 128m at 0.39% Ni inc. 36m at 0.50% Ni, 6 February 2026) • Infill and extend the current Mineral Resource Estimate (ASX, Mulga Tank Mineral Resource Over 5Mt Contained Nickel, 10 April 2025) ASX:WMG www.westernmines.com.au 7 ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK ASX:WMG www.westernmines.com.au 8 ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK Figure 5: Processed pXRF data for hole MTRC001 Possible Ni depletion zone ≤1,000ppm Ni with high S DISCUSSION Hole MTD031 is part of a southern fence of holes designed to infill and extend the Mulga Tank Mineral Resource Estimate to the south, drilled as diamond core to conserve fuel during the peak of diesel uncertainty. This fence has recently be completed with RC holes MTRC073 to MTRC075. MTD031 showed an essentially continuous intersection of robust mineralisation with 230.2m at 0.30% Ni from 90m and a S:Ni of 1.3 over the interval. This southern area of drilling within the main body of the Mulga Tank Complex has returned some of the best mineralisation to date across the now 75 shallow RC holes WMG has drilled, including nearby hole MTRC066 (ASX, MTRC066 Best RC Hole to Date at Mulga Tank 18 September 2026; Commencing 2026 Exploration Drilling at Mulga Tank, 23 January 2026). The MTRC001 diamond tail focuses on another theme that Company is following up on, testing the relatively shallower western margin of the Mulga Tank Complex and chasing the up-dip continuation of two enriched basal zones seen in MTD028 and MTRC011. The diamond tail was drilled from 444m to 895m. The first 2m of the original RC hole appear to contain low MgO mafic, believed to be the base of the dolerite sill marker horizon seen in the deeper eastern portion of the Complex. The hole therefore contains essentially the entire ~800m basal portion of the Complex beneath the dolerite. Between the combination of the existing RC assay results and initial pXRF results from the diamond tail the familiar pattern of mineralised and unmineralised horizons can once again be seen. pXRF results from the lower mineralised basal contact zone appear to show considerable nickel depletion indicating this area of the basal magma pulse maybe be downstream of a significant nickel sulphide accumulating event. After a number of somewhat frustrating delays the Phase 5 drilling program is now running smoothly. The rig has completed the next batch of pre-collars and has recommenced RC drilling. These next holes focus around MTRC046 and MTRC066 targeting extensions of higher grade mineralisation, to help model distribution of higher grades within the Mulga Tank Mineral Resource Estimate. Following these holes the second half of the Phase 5 program will include a number of holes in a new area in the SW of the main body of the Complex. This area is interpreted to contain a shallower uplifted portion of the ~800m basal sequence of the Complex beneath the dolerite sill with the hope of intersecting the up-dip continuation of the broad +100m +0.40% Ni enriched zones seen in MTD028 and MTRC011 but in a near surface position directly under the sand. ASX:WMG www.westernmines.com.au 9 HoleID Status Drilled Assay Results Comments MTD031 Complete Diamond Received Southern infill fence MTRC009 Complete Diamond tail At lab Final batch of core cut and delivered to lab early May MTRC070 Complete RC with diamond tail At lab RC received waiting on diamond MTRC072 Complete RC with diamond tail At lab RC received waiting on diamond MTRC073 Complete RC At lab Recent RC infill hole MTRC074 Complete RC At lab Recent RC infill hole MTRC075 Complete RC At lab Recent RC infill hole MTRC001 Complete Diamond tail Cutting in progress Not at lab Table 1: Summary of recent drilling and assay status at Mulga Tank ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK The Company looks forward to the completion of Phase 5 over the next couple of months. Each phase of drilling and batch of geochemical assay results continues to build our understanding of the Mulga Tank Complex. The Company uses these results to feedback into ongoing exploration targeting work looking to vector towards zones of high-grade mineralisation in what the Company believes is an extensive hybrid nickel sulphide mineral system at Mulga Tank. . For further information please contact: Dr Caedmon Marriott Managing Director Tel: +61 475 116 798 Email: contact@westernmines.com.au Western Mines Group InvestorHub Investors are encouraged to join the Western Mines Group InvestorHub to receive news and updates, engage directly with the WMG team, and post questions and feedback through the Q&A function accompanying each piece of content. How to join: 1. Head to our InvestorHub 2. Follow the prompts to sign up for an InvestorHub account 3. Complete your account profile ASX:WMG www.westernmines.com.au 10 This announcement has been authorised for release to the ASX by Dr Caedmon Marriott, Managing Director ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK APPENDIX HoleID From (m) To (m) Primary Lithology Alteration Comments MTRC001 0 444 Previously drilled with RC October 2023 MTRC001 444 491 Adcumulate Dunite cb, mt Light green-grey adcumulate to mesocumulate completely altered to a magnetite- carbonate overprint MTRC001 491 498.5 Mesocumulate Dunite cb, cl Mesocumulate with varying crescumulate olivine grain size, many irregular chloritised pockets of melt MTRC001 498.5 505.3 Adcumulate Dunite cb, srp Light green-grey adcumulate to extreme adcumulate, completely carbonate-serpentinite altered MTRC001 505.3 507.8 Mesocumulate Dunite cb, cl Mesocumulate with partially chloritised interstitial melt MTRC001 507.8 540 Adcumulate Dunite cb, srp, mt Continuing light green-grey adcumulate to extreme adcumulate, stronger magnetite alteration due to higher forsterite content, complete serpentinite to carbonate overprint MTRC001 540 575.5 Adcumulate Dunite srp, cb, mt Green-grey adcumulate to extreme adcumulate with frequent parallel carbonate veins (~20/295), intense shear zones throughout that are orthogonal to the veins and host talc- carbonate-chlorite alteration, sulphide pockets downgraded to magnetite MTRC001 575.5 577 Mesocumulate Dunite cb, srp Blue-green mesocumulate, frequent small incompatible pockets of barren sulphides MTRC001 577 600.95 Adcumulate Dunite srp, cb Medium-coarse grained adcumulate to extreme adcumulate, strong serpentinite and carbonate alteration MTRC001 600.95 601.2 Mesocumulate Dunite cb, srp Blue-green mesocumulate with large chloritised pockets of incompatibles, very coarse grained, pegmatitic and highly altered olivines at selvedge MTRC001 601.2 634 Adcumulate Dunite srp, tc, cb, cl Strongly altered adcumulate to extreme adcumulate, talc-chlorite-carbonate veins, large chloritised pocket with globular pentlandite-pyrrhotite MTRC001 634 641 Mesocumulate Dunite srp, mt Mesocumulate with abundant chloritised incompatible pockets, magnetite at selvedge to pockets indicates likely sulphide downgrading MTRC001 641 660.1 Adcumulate Dunite srp, mt Dark adcumulate to extreme adcumulate with minor to moderate mesh textures and magnetite staining MTRC001 660.1 662.6 Mesocumulate Dunite srp Variably coarse mesocumulate with irregular melt pockets MTRC001 662.6 667.15 Adcumulate Dunite srp, cb Green adcumulate to extreme adcumulate, serpentinised with large carbonate veins ASX:WMG www.westernmines.com.au 11 HoleID From (m) To (m) Interval (m) Ni (%) Co (ppm) Cu (ppm) Pt + Pd (ppb) MTD031 90 320.2 230.2 0.30 131 104 19 MTD031 inc. 199 206 7 0.48 212 397 28 MTD031 and inc. 259 265 6 1.02 366 303 33 MTD031 and inc. 298 that inc. 300 and that inc. 304 306 301 305 8 1 1 0.81 1.44 1.83 269 498 539 340 1710 371 26 114 55 Table 2: Significant intersections hole MTD031 HoleID Easting (MGA51) Northing (MGA51) Total Depth (m) Azimuth Dip MTD031 520699 6688200 320.2 270 -70 MTRC001 519398 6688704 895 270 -70 MTRC073 520902 6688201 318 270 -70 MTRC074 521098 6688200 318 270 -70 MTRC075 521098 6688203 318 270 -70 Table 3: Collar details for holes mentioned in announcement ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK MTRC001 667.15 667.35 Mesocumulate Dunite srp Mesocumulate with irregular melt pockets hosting high tenor sulphide jellyfish, very large harrisite pegmatitic olivines MTRC001 667.35 698.4 Adcumulate Dunite srp, tc, cb, mt Dark adcumulate with mesh textured olivines and magnetite staining, disseminated sulphide throughout and jellyfish hosting pentlandite-pyrrhotite, multiple ~50cm fault zones hosting strong carbonate-talc-chlorite alteration and sections of fresh lizardite MTRC001 698.4 698.8 Mesocumulate Dunite srp, mt Mesocumulate with pegmatitic, magnetite stained olivines, large pockets of dark incompatibles hosting pentlandite-pyrrhotite MTRC001 698.8 745.6 Adcumulate Dunite srp, mt, tc, cb Medium-coarse grained adcumulate with mesh textured and magnetite stained olivines that are sparsely pegmatitic, strong serpentinisation and multiple fault zones hosting coarse lizardite and talc-carbonate, one of which also hosts jellyfish-like remobilised ~10cm layers of altered harrisite olivine, chlorite and high tenor pentlandite-pyrrhotite, disseminated sulphide and sparse incompatible pockets with sulphide throughout MTRC001 745.6 745.9 Mesocumulate Dunite tc, cb, mt Mesocumulate with many small pockets of chloritised incompatible with sulphide rims, pockets appear to be slightly remobilised and are aligned with a talc-carbonate vein MTRC001 745.9 750.2 Adcumulate Dunite srp, mt Medium grained adcumulate with disseminated sulphides and abundant serpentinite veins MTRC001 750.2 775 Ad-Mesocumulate Dunite srp, tc, cb, mt Medium-coarse grained adcumulate with mesh textured and magnetite stained olivines, cut by many sub-parallel talc-carbonate-serpentinite veins, multiple narrow zones of mesocumulate containing small pockets of incompatibles with sulphide as well as large jellyfish containing high % pentlandite-pyrrhotite, one such jellyfish appears to be remobilised along a plane MTRC001 775 823.9 Adcumulate Dunite srp, mt Dark adcumulate with fine-medium grained olivines displaying mesh textures, consistent disseminated sulphides throughout MTRC001 823.9 826.8 Adcumulate Dunite mt Dark adcumulate with strong magnetite alteration, interstitial material is almost entirely sulphide, forming near-net textures MTRC001 826.8 838.2 Adcumulate Dunite srp, mt Medium-coarse grained adcumulate with many sub-parallel remobilised magnetite veins, high % relatively coarse disseminated sulphides MTRC001 838.2 855.4 Adcumulate Dunite srp, cb Black-grey highly altered adcumulate with original texture mostly overwritten MTRC001 855.4 856.1 Metashale si Stark footwall contact, immediately into partially silicified foliated metashale with many sulphide bands MTRC001 856.1 883.3 Metabasalt and Metashale cl, si Grey chloritised metabasalt with areas of brecciation and sulphide bearing veins, interbedded with narrow intervals of metashale displaying strongly silicified bands and sulphide including chalcopyrite MTRC001 883.3 889.2 Metashale cl Dark intensely folded metashale with abundant sulphide bands, strong green chlorite/ greenschist facies alteration MTRC001 889.2 895 Metabasalt cl Grey metabasalt with sulphide and quartz veins, weakly developed foliation HoleID From (m) To (m) Primary Lithology Alteration Comments ASX:WMG www.westernmines.com.au 12 ASX RELEASE | FURTHER HIGH-GRADE RESULTS FROM MULGA TANK Table 4: Logging table summary for hole MTRC001 HoleID From (m) To (m) Interval (m) Lithology Sulphide Texture Sulphide Abundance (%) Sulphides Observed MTRC001 451 455 4 Adcumulate Dunite Disseminated 1-2% Pyrite-Pentlandite MTRC001 641 698.8 57.8 Meso-adcumulate Dunite Disseminated Blebby/Globules tr-5% 5-10% Pentlandite Pentlandite-Pyrrhotite MTRC001 703.3 768.2 64.9 Adcumulate Dunite Disseminated Blebby/Globules 1-4% 5-10% Pentlandite Pentlandite-Pyrrhotite MTRC001 771 828.5 57.5 Adcumulate Dunite Disseminated Near net-textured tr-4% 8-10% Pentlandite Pentlandite-Pyrrhotite MTRC001 832 855.4 23.4 Ad-extreme Adcumulate Dunite Disseminated Blebby tr-3% 2-8% Pentlandite Pentlandite-Pyrrhotite Table 5: Visual sulphide table for hole MTRC001 ASX:WMG www.westernmines.com.au 13 ABOUT WMG Western Mines Group Ltd (ASX:WMG) is a mineral exploration company driven by the goal to create significant investment returns for our shareholders through exploration and discovery of high-value gold and nickel sulphide deposits across a portfolio of highly- prospective projects located on major mineral belts of Western Australia. Our flagship project is the Mulga Tank Ni-Co-Cu-PGE Project, a major ultramafic complex found on the under-explored Minigwal Greenstone Belt (100% WMG). WMG’s exploration work has discovered a significant nickel sulphide mineral system and is considered highly prospective for globally significant Ni-Co-Cu-PGE deposits. An Mineral Resource Estimate of 1,968Mt at 0.27% Ni, over 5.3Mt of contained nickel, was announced in April 2025, making Mulga Tank the largest nickel sulphide deposit in Australia. The Company’s primary gold project is Jasper Hill, where WMG has strategically consolidated a 3km mineralised gold trend with walk-up drill targets. WMG has a diversified portfolio of other projects including Fraser Range (Ni-Cu-Co), Mt Narryer (Ni-Co-Cu-PGE, Au) and Youanmi (Au). COMPETENT PERSONS STATEMENT The information in this announcement that relates to Exploration Results and other technical information complies with the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code) and has been compiled and assessed under the supervision of Dr Caedmon Marriott, Managing Director of Western Mines Group Ltd. Caedmon is a Member of the Australian Institute of Geoscientists and a Member of the Society of Economic Geologists. He has sufficient experience that is releva