Western Mines Group Ltd (WMG or Company) (ASX:WMG) is pleased to update shareholders on the geochemical assay results recently received for the diamond core tail to previous reverse circulation (RC) hole MTRC001 along with RC holes MTRC083 to MTRC087 at the Mulga Tank Ni-Co-Cu-PGE Project, on the Minigwal Greenstone Belt, in Western Australia’s Eastern Goldfields. Holes MTRC001 and MTRC083 to MTRC087 are all located on the western side of the Mulga Tank Complex. With MTRC001 drilled at the south-westernmost corner of Phase 1 RC holes (drilled in September-November 2023) and MTRC083 to MTRC087 drilled further west and southwest from this position (Figure 1). 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 diamond tail of hole MTRC001 and RC holes MTRC083 and MTRC087 at the Mulga Tank Project • All holes located in the western margin of the main body of the Mulga Tank Complex and geochemical signatures confirm uplift of basal portion of the Complex to higher level • Combined with previous RC samples the assay results for MTRC001 show cumulative nickel sulphide mineralisation of: Cumulative 442m at 0.26% Ni, 129ppm Co, 78ppm Cu, 27ppb Pt+Pd with S:Ni 1.4 • Zone of higher grade sulphide mineralisation within the Basal Zone of: MTRC001 74m at 0.32% Ni, 142ppm Co, 115ppm Cu, 31ppb Pt+Pd from 762m inc. 23m at 0.42% Ni, 144ppm Co, 74ppm Cu, 44ppb Pt+Pd from 812m • RC holes show broad zones of nickel sulphide mineralisation - elevated Ni, S and chalcophiles - as well as barren zones demonstrating familiar geochemical stratigraphy of the basal complex MTRC083 Cumulative 171m at 0.30% Ni, 134ppm Co, 57ppm Cu, 30ppb Pt+Pd with S:Ni 0.8* MTRC084 Cumulative 79m at 0.29% Ni, 113ppm Co, 34ppm Cu, 53ppb Pt+Pd with S:Ni 0.5 MTRC085 Cumulative 169m at 0.26% Ni, 125ppm Co, 54ppm Cu, 24ppb Pt+Pd with S:Ni 1.2 MTRC086 Cumulative 124m at 0.29% Ni, 115ppm Co, 11ppm Cu, 6ppb Pt+Pd with S:Ni 0.5* MTRC087 Cumulative 98m at 0.21% Ni, 117ppm Co, 74ppm Cu, 20ppb Pt+Pd with S:Ni 1.9* • These results greatly aid modelling the architecture of the Complex along the uplifted western margin • Variations of mineralisation strength within the two high-grade basal target horizons should enable vectoring to prospective richer zones in both shallower positions and at depth BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN ASX RELEASE 21 SEPTEMBER 2026 Shares on Issue: 130.37m Share Price: $0.155 Market Cap: $20.21m Cash: $1.58m (30/06/26) Telephone: +61 475 116 798 Email: contact@westernmines.com.au The diamond tail extension to hole MTRC001 continued to follow up-dip from previous diamond tail MTRC011(ASX, High-Grade Sulphide Segregations at Depth in MTRC011, 30 October 2025; MTRC011 128m at 0.39% Ni inc. 36m at 0.50% Ni, 5 February 2026) which was designed to step out from hole MTD028 and test the enriched basal contact of the Complex at shallower depths (ASX, MTD028 Disseminated Nickel Sulphide 140m at 0.49% Ni, 31 October 2023). Holes MTRC083 to MTRC087 were designed to test new areas of the Complex and the idea that the southwestern part of the main body represents the most uplifted portion of the Complex and investigate whether the enriched basal horizons could be intersected near surface. MTRC001 tail intersected a ~410m thickness of high MgO adcumulate dunite ultramafic containing disseminated magmatic sulphides (trace to 2%) that in a number of places coalesced into interstitial blebs (3 to 5% sulphide). Combined with previous RC sample assays (ASX, First RC Assays Show Broad Zones of Mineralisation, 14 November 2023) the results from the hole cumulatively total: MTRC001 442m at 0.26% Ni, 129ppm Co, 78ppm Cu, 27ppb Pt+Pd with S:Ni 1.4 These geochemical results for the entire hole show the now familiar geochemical signature of the basal portion of the Complex with broad intersections of disseminated nickel mineralisation with elevated Ni and S, in combination with anomalous Cu and PGE, divided by two horizons of barren unmineralised dunite lacking S, Cu and PGE: MTRC001 163m at 0.20% Ni, 123ppm Co, 80ppm Cu, 19ppb Pt+Pd from 94m 29m at 0.42% Ni, 138ppm Co, 85ppm Cu, 17ppb Pt+Pd from 344m 74m at 0.28% Ni, 138ppm Co, 63ppm Cu, 63ppb Pt+Pd from 382m inc. 2m at 0.43% Ni, 145ppm Co, 54ppm Cu, 22ppb Pt+Pd from 382m and inc. 5m at 0.48% Ni, 166ppm Co, 178ppm Cu, 21ppb Pt+Pd from 410m and inc. 14m at 0.41% Ni, 150ppm Co, 69ppm Cu, 0.15g/t Pt+Pd from 442m 23m at 0.35% Ni, 130ppm Co, 17ppm Cu, 4ppm Pt+Pd from 629m 79m at 0.23% Ni, 115ppm Co, 69ppm Cu, 18ppb Pt+Pd from 675m inc. 7m at 0.37% Ni, 150ppm Co, 57ppm Cu, 8ppb Pt+Pd from 677m and inc. 6m at 0.40% Ni, 161ppm Co, 122ppm Cu, 45ppb Pt+Pd from 734m 74m at 0.32% Ni, 142ppm Co, 115ppm Cu, 31ppb Pt+Pd from 762m inc. 23m at 0.42% Ni, 144ppm Co, 74ppm Cu, 44ppb Pt+Pd from 812m Assay results for holes MTRC083 to MTRC087 also showed similar elements of this pattern with broad intersections of disseminated nickel mineralisation with elevated Ni and S, in combination with anomalous Cu and PGE, divided by horizons of barren unmineralised dunite lacking S, Cu and PGE. The results validate the idea that the southwestern part of the main body represents the most uplifted portion of the Complex and that this area contains the same basal accumulation that usually occurs at much greater depths within the centre of the Complex. MTRC083 Cumulative 171m at 0.30% Ni, 134ppm Co, 57ppm Cu, 30ppb Pt+Pd with S:Ni 0.8* MTRC084 Cumulative 79m at 0.29% Ni, 113ppm Co, 34ppm Cu, 53ppb Pt+Pd with S:Ni 0.5 MTRC085 Cumulative 169m at 0.26% Ni, 125ppm Co, 54ppm Cu, 24ppb Pt+Pd with S:Ni 1.2 ASX:WMG www.westernmines.com.au 2 ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN MTRC086 Cumulative 124m at 0.29% Ni, 115ppm Co, 11ppm Cu, 6ppb Pt+Pd with S:Ni 0.5* MTRC087 Cumulative 98m at 0.21% Ni, 117ppm Co, 74ppm Cu, 20ppb Pt+Pd with S:Ni 1.9* Interesting results were seen in hole MTRC084 where a shallow zone of higher grade mineralisation was intersected near surface (below the sand cover), whilst a lot of the rest of the hole clearly intersected a barren horizon. The shallow zone returned: MTRC084 24m at 0.35% Ni, 140ppm Co, 103ppm Cu, 0.16g/t Pt+Pd from 96m inc. 13m at 0.41% Ni, 153ppm Co, 177ppm Cu, 0.21g/t Pt+Pd from 98m Preliminary interpretation and modelling suggests this is likely an enriched zone of the middle mineralised horizon of the basal sequence (also seen to be enriched in hole MTRC011) and following up on this horizon in a NNE direction may find broader intervals. Hole MTRC083 appears to be entering a strongly elevated nickel zone in the last ~8m of the hole. Preliminary interpretation and modelling suggests following up on this in a WSW direction may intersect the zone at shallower depths. ASX:WMG www.westernmines.com.au 3 Figure 1: WMG drilling on the Western Margin of the Mulga Tank Complex ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN Commenting on the assay results, WMG Managing Director Caedmon Marriott said: “Collectively the results from holes MTRC001 and MTRC083 to MTRC087 look to validate the idea that the southwestern part of the main body represents the most uplifted portion of the Complex. They were designed to follow up-dip from holes MTD028 and MTRC011 and investigate whether enriched basal horizons could be intersected nearer surface. The base of the dolerite marker horizon, intersected at ~750m depth in the likes of holes MTD026 and MTD029, appears to occur in the top couple of metres of hole MTRC001 and the whole ~790m dunite portion of hole drilled in MTRC001 therefore represents the complete basal sequence of the Complex. This is confirmed by the assay results which show the familiar broad geochemical stratigraphy of the basal sequence with three mineralised horizons divided by two barren zones lacking S and chalcophiles. Holes MTRC083 to MTRC087 looked to test new areas within this southwestern part of the Complex, interpreted to all be beneath the dolerite horizon. MTRC084 showed a robustly mineralised shallow zone of +0.4% Ni close to surface, whilst MTRC083 appeared to be entering a high nickel zone towards the end of the hole. Lateral variations in the strength of mineralisation within the mineralised horizons is to be expected. Modelling of the architecture of the Complex in this southwestern area, combined with assay results, may help vector towards richer zones.” MULGA TANK DRILLING PROGRAMS Exploration results from the Company’s various drilling programs at the Mulga Tank Project over the last three years 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 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 MTRC001 Hole MTRC001 was drilled in September 2023 as part of the westernmost fence of the Company’s Phase 1 RC program (along with holes MTRC010, MTRC011 and MTRC012). The hole is located ~600m S of hole MTRC011, which itself was ~400m SW of MTD028. 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). MTRC011 diamond tail aimed to step out from hole MTD028 (ASX, MTRC011 128m at 0.39% Ni inc. 36m at 0.50% Ni, 5 February 2026) whilst this diamond tail to MTRC001 looked to further test the basal contact of the Complex up-dip from MTD028 and MTRC011. ASX:WMG www.westernmines.com.au 4 ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN The MTRC001 diamond tail extension was drilled from 444m to a total depth of 895.1m and intersected ~410m of variably serpentinised and talc-carbonate altered high MgO adcumulate dunite ultramafic (444-855.5m), before encountering a footwall of basalt and silicified shales at 855.5m depth (855.5-895.1m). Disseminated magmatic sulphides (trace to 2%) were observed at numerous intervals down the hole. In a number of places the disseminated sulphides coalesce into interstitial blebs (3 to 5% sulphide) between former olivine crystals. HIGH MGO ADCUMULATE DUNITE Assay results for MTRC001 averaged 48.6% MgO and 0.30% Al2O3 (volatile free) over the logged ultramafic portion of the hole (Figure 2). 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 extremely adcumulate dunite with Al2O3 generally less than 0.5% and MgO greater than 40%. MTRC001 showed similarities with both holes MTRC011 (Figure 3) and MTD028, encountering what is thought to be the base of the dolerite horizon in the top few metres of the hole (MTRC011 dolerite 124m to 161m, MTD028 dolerite 239m to 265m) with a 790m package of adcumulate dunite above the footwall contact. ASX:WMG www.westernmines.com.au 5 Figure 3: MTRC011 MgO and Al2O3 (volatile free) Dolerite Figure 2: MTRC001 MgO and Al2O3 (volatile free) Dolerite ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN EVIDENCE FOR SULPHIDES AS NICKEL HOST Broad intersections of visible disseminated nickel sulphide mineralisation were observed down the hole. The geochemical assay results validate the geological logging and confirm extensive zones of mineralisation with significant evidence for “live” magmatic sulphide chemical processes. 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. A number of elements, such as Cu and in particular PGE’s (Pt and Pd), have high affinity for sulphide, and in combination with S (and the S:Ni ratio) are used as geochemical indicators to confirm the presence of active magmatic sulphide mineral processes. The assay results for MTRC001 demonstrate extensive zones of highly anomalous Cu and PGE’s in combination with elevated S, and a S:Ni ratio greater than 0.5 (Figure 4). These zones correlate well with the visible sulphides observed in the geological logging and together provide strong evidence for nickel in sulphide. A number of significant broad mineralised intersections were observed down the hole. These were generally defined by a combination of the various geochemical indicators and cut-off grades (Ni >0.15%, Cu >20ppm, Pt+Pd >20ppb, S:Ni >0.5), with only minimal inclusion of unmineralised material below mineable width. The broad mineralised intersections defined were: MTRC001 163m at 0.20% Ni, 123ppm Co, 80ppm Cu, 19ppb Pt+Pd from 94m 29m at 0.42% Ni, 138ppm Co, 85ppm Cu, 17ppb Pt+Pd from 344m 74m at 0.28% Ni, 138ppm Co, 63ppm Cu, 63ppb Pt+Pd from 382m inc. 2m at 0.43% Ni, 145ppm Co, 54ppm Cu, 22ppb Pt+Pd from 382m and inc. 5m at 0.48% Ni, 166ppm Co, 178ppm Cu, 21ppb Pt+Pd from 410m and inc. 14m at 0.41% Ni, 150ppm Co, 69ppm Cu, 0.15g/t Pt+Pd from 442m 23m at 0.35% Ni, 130ppm Co, 17ppm Cu, 4ppm Pt+Pd from 629m 79m at 0.23% Ni, 115ppm Co, 69ppm Cu, 18ppb Pt+Pd from 675m inc. 7m at 0.37% Ni, 150ppm Co, 57ppm Cu, 8ppb Pt+Pd from 677m and inc. 6m at 0.40% Ni, 161ppm Co, 122ppm Cu, 45ppb Pt+Pd from 734m 74m at 0.32% Ni, 142ppm Co, 115ppm Cu, 31ppb Pt+Pd from 762m inc. 23m at 0.42% Ni, 144ppm Co, 74ppm Cu, 44ppb Pt+Pd from 812m ASX:WMG www.westernmines.com.au 6 Figure 4: MTRC001 Co, Cu, S and Pt+Pd Dolerite Unmineralised Unmineralised Active basal zone Upper active zone Broad mineralised zone ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN Which cumulatively total: 442m at 0.26% Ni, 129ppm Co, 78ppm Cu, 27ppb Pt+Pd with S:Ni 1.4 Again, MTRC001 shows similarities with MTRC011 and MTD028 (Figure 5) in the trends in mineralisation, with a broad mineralised zone beneath the dolerite horizon, along with an active basal zone and a second upper active zone, divided by two unmineralised intervals. MTRC011 Upper Zone 128m at 0.39% Ni, 138ppm Co, 50ppm Cu, 25ppb Pt+Pd from 490m inc. 36m at 0.50% Ni, 139ppm Co, 55ppm Cu, 49ppb Pt+Pd from 494m Basal Zone 162m at 0.32% Ni, 123ppm Co, 22ppm Cu, 16ppb Pt+Pd from 694m MTD028 Upper Zone 116m at 0.27% Ni, 127ppm Co, 59ppm Cu, 39ppb Pt+Pd from 630m Basal Zone 140m at 0.49% Ni, 161ppm Co, 92ppm Cu, 61ppb Pt+Pd from 874m inc. 82m at 0.55% Ni, 173ppm Co, 114ppm Cu, 74ppb Pt+Pd from 886m RC HOLES MTRC083 TO MTRC087 Holes MTRC083 to MTRC087 were designed to test new areas of the Complex and the idea that the southwestern part of the main body contains the most uplifted portion of the Complex. The holes looked to investigate whether the dunite in this area represents the same basal sequence as seen beneath the dolerite sill in deeper parts of the Complex and if the familiar geochemical signature and enriched basal horizons could be intersected near surface. Assay results for MTRC083 averaged 48.1% MgO and 0.13% Al2O3 (volatile free) over the 246m ultramafic portion of the hole, MTRC084 averaged 47.4% MgO and 0.23% Al2O3 (volatile free) over 246m of ultramafic, MTRC085 averaged 48.5% MgO and 0.13% Al2O3 (volatile free) over 222m of ultramafic, MTRC086 averaged 48.4% MgO and 0.23% Al2O3 (volatile free) over 233m of ultramafic and MTRC087 averaged 47.8% MgO and 0.25% Al2O3 (volatile free) over 231m of ultramafic. 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 between 0.1% and 0.5% and MgO greater than 40%. ASX:WMG www.westernmines.com.au 7 Figure 5: MTD028 Co, Cu, S and Pt+Pd Dolerite Active basal zone Upper active zone Unmineralised Unmineralised Broad mineralised zone ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN A number of broad mineralised intersections were observed down the holes, along with a number of unmineralised intervals lacking S and chalcophile elements, characteristic of the geochemical signature of the basal sequence. Mineralised intersections were generally defined by a combination of the various geochemical indicators and cut-off grades (Ni >0.15%, Cu >20ppm, Pt+Pd >20ppb, S:Ni >0.5), with only minimal inclusion of unmineralised material below mineable width. MTRC083 51m at 0.30% Ni, 123ppm Co, 40ppm Cu, 10ppb Pt+Pd from 95m inc. 14m at 0.36% Ni, 133ppm Co, 17ppm Cu, 10ppb Pt+Pd from 132m 120m at 0.30% Ni, 140ppm Co, 67ppm Cu, 39ppb Pt+Pd from 159m inc. 26m at 0.33% Ni, 120ppm Co, 30ppm Cu, 7ppb Pt+Pd from 160m inc. 4m at 0.44% Ni, 170ppm Co, 79ppm Cu, 134ppb Pt+Pd from 230m inc. 6m at 0.35% Ni, 153ppm Co, 73ppm Cu, 56ppb Pt+Pd from 252m inc. 4m at 0.46% Ni, 173ppm Co, 117ppm Cu, 138ppb Pt+Pd from 266m 8m at 0.47% Ni, 124ppm Co, 7ppm Cu, 26ppb Pt+Pd from 310m* Cumulative 171m at 0.30% Ni, 134ppm Co, 57ppm Cu, 30ppb Pt+Pd with S:Ni 0.8* * Ending in mineralisation MTRC084 23m at 0.35% Ni, 140ppm Co, 103ppm Cu, 0.16g/t Pt+Pd from 96m inc. 13m at 0.41% Ni, 153ppm Co, 177ppm Cu, 0.21g/t Pt+Pd from 98m 12m at 0.29% Ni, 107ppm Co, 2ppm Cu, 44ppb Pt+Pd from 230m inc. 2m at 0.37% Ni, 122ppm Co, 2ppm Cu, 0.18g/t Pt+Pd from 238m 25m at 0.27% Ni, 107ppm Co, 7ppm Cu, 1ppb Pt+Pd from 250m inc. 4m at 0.43% Ni, 157ppm Co, 18ppm Cu, 4ppb Pt+Pd from 260m 19m at 0.23% Ni, 93ppm Co, 5ppm Cu, 2ppb Pt+Pd from 291m Cumulative 79m at 0.29% Ni, 113ppm Co, 34ppm Cu, 53ppb Pt+Pd with S:Ni 0.5 ASX:WMG www.westernmines.com.au 8 Figure 6: MTRC083 Co, Cu, S and Pt+Pd Unmineralised ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN MTRC085 154m at 0.26% Ni, 125ppm Co, 56ppm Cu, 25ppb Pt+Pd from 96m inc. 11m at 0.41% Ni, 158ppm Co, 108ppm Cu, 38ppb Pt+Pd from 177m and inc. 16m at 0.36% Ni, 132ppm Co, 20ppm Cu, 32ppb Pt+Pd from 197m and inc. 2m at 0.44% Ni, 187ppm Co, 206ppm Cu, 84ppb Pt+Pd from 233m 15m at 0.29% Ni, 128ppm Co, 36ppm Cu, 4ppb Pt+Pd from 259m Cumulative 169m at 0.26% Ni, 125ppm Co, 54ppm Cu, 24ppb Pt+Pd with S:Ni 1.2 MTRC086 11m at 0.35% Ni, 140ppm Co, 62ppm Cu, 12ppb Pt+Pd from 102m 10m at 0.40% Ni, 154ppm Co, 27ppm Cu, 46ppb Pt+Pd from 142m 103m at 0.28% Ni, 108ppm Co, 4ppm Cu, 1ppb Pt+Pd from 197m* inc. 3m at 0.85% Ni, 252ppm Co, 21ppm Cu, 1ppb Pt+Pd from 199m that inc. 1m at 1.61% Ni, 472ppm Co, 44ppm Cu, 2ppb Pt+Pd from 199m Cumulative 124m at 0.29% Ni, 115ppm Co, 11ppm Cu, 6ppb Pt+Pd with S:Ni 0.5* * Ending in mineralisation ASX:WMG www.westernmines.com.au 9 Figure 8: MTRC085 Co, Cu, S and Pt+Pd Unmineralised Figure 7: MTRC084 Co, Cu, S and Pt+Pd Unmineralised Weakly mineralised ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN MTRC087 17m at 0.21% Ni, 115ppm Co, 103ppm Cu, 22ppb Pt+Pd from 91m 49m at 0.22% Ni, 119ppm Co, 97ppm Cu, 19ppb Pt+Pd from 132m 32m at 0.21% Ni, 114ppm Co, 23ppm Cu, 22ppb Pt+Pd from 268m* Cumulative 98m at 0.21% Ni, 117ppm Co, 74ppm Cu, 20ppb Pt+Pd with S:Ni 1.9* * Ending in mineralisation DISCUSSION Phase 1 RC hole MTRC001 was successfully extended with a diamond tail to further test the basal contact on the western margin of the Mulga Tank Complex up-dip from previous holes MTD028 and MTRC011. Holes MTRC083 to MTRC087 were designed to investigate whether the enriched basal horizons could be intersected nearer surface and test new areas of the Complex in southwestern part of the main body. The assay results from MTRC001 show similarities to MTD028 and MTRC011 in the trends in mineralisation and highlight the familiar geochemical signature of the basal ~800m sequence of the Complex with three mineralised zones dividend by two unmineralised intervals. In the bottom portion of the holes the active basal contact zone and second upper active zone tend to show the best mineralisation. ASX:WMG www.westernmines.com.au 10 Figure 10: MTRC087 Co, Cu, S and Pt+Pd Unmineralised Figure 9: MTRC086 Co, Cu, S and Pt+Pd Unmineralised Unmineralised Weakly mineralised ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN The Company currently interprets these two mineralised horizons as being separate sulphur saturated magma pulses or flows, divided by unsaturated or less mineralised injections. The two zones can be traced laterally over several hundreds of metres to kilometres (MTRC011 to MTD027 is 2.4km) revealing the architecture of the Complex with the horizons moderately dipping to the east and slightly plunging to the north. Results from MTRC001 demonstrate these horizons continuing up-dip to the SSW of MTD028. Assay results for holes MTRC083 to MTRC087 also showed similar elements of this pattern with broad intersections of disseminated nickel mineralisation with elevated Ni and S, in combination with anomalous Cu and PGE, divided by horizons of barren unmineralised dunite lacking S, Cu and PGE. The current interpretation of these results is that this western portion of the Complex contains the same basal accumulation that usually occurs at much greater depths within the centre of the Complex. Interesting results were seen in hole MTRC084 where a shallow zone of higher grade mineralisation was intersected near surface (below the sand the cover), whilst a lot of the rest of the hole clearly intersected a barren and weakly mineralised horizon with low chalcophile concentrations and S:Ni of only 0.5. MTRC086 to the south intersect the same mostly barren and weakly mineralised horizon. Modelling of these horizons can begin to put together the architecture of the western portion of the Complex and preliminary interpretation suggests the MTRC084 enriched zone represents the middle mineralised horizon of the basal sequence (also seen to be enriched in hole MTRC011) and following up on this horizon in a NNE direction may find broader near surface intervals. ASX:WMG www.westernmines.com.au 11 Figure 11: Schematic cross section SSW-NNE through the western margin of the Mulga Tank Complex ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN Both of these lower horizons with the Complex are compelling targets, often with frequent instances of visual mineralisation, including remobilised massive sulphide veining and large sulphide globules and segregations. Potential zones of richer mineralisation may not occur in the same location in both layers which greatly increases the prospectivity of the Complex, effectively doubling the prospective area. Channels or lateral zones with higher flux in either of these independent magma layers could host richer sulphide deposits. Modelling of the architecture along with trends in the geochemical assay results may help vector towards richer mineralised zones. EIS SEISMIC SURVEY The Company was successful in its application to EIS Venture 3 Co-Funded Geophysics under the WA State Government’s Co-funded Geophysics Program 2026-2027, part of the Exploration Incentive Scheme (EIS) and has been awarded the maximum $250,000 of co-funding towards 50% of costs of an active seismic survey targeting the main body of the Mulga Tank Ultramafic Complex within tenement E39/2132 (ASX, WMG Wins $250,000 EIS Award for Mulga Tank Seismic Survey, 27 April 2026). This grant has recently been increased by additional $50,000 to $300,000 by the EIS program. WMG intends to use this funding to conduct a ~35km2 active seismic survey looking to image the architecture of the Mulga Tank Ultramafic Complex and its emplacement within the Minigwal Greenstone Belt to aid targeting of the basal contact for Perseverance-style massive nickel sulphide deposits. The Company has recently been granted the Program of Work (PoW) to begin site preparation for the survey. The seismic contractor has been delayed slightly by an extension at their previous project but is expected to begin mobilising to site at the end of September with the survey anticipated to be undertaken during the first 2-3 weeks of October. For further information please contact: Dr Caedmon Marriott Managing Director Tel: +61 475 116 798 Email: contact@westernmines.com.au ASX:WMG www.westernmines.com.au 12 This announcement has been authorised for release to the ASX by Dr Caedmon Marriott, Managing Director ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN APPENDIX ASX:WMG www.westernmines.com.au 13 Table 1: Significant intersections holes MTRC001 and MTRC083 to MTRC087 ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN HoleID From (m) To (m) Interval (m) Ni (%) Co (ppm) Cu (ppm) Pt + Pd (ppb) MTRC001 95 257 162 0.20 123 81 19 MTRC001 344 373 29 0.42 138 86 17 MTRC001 382 inc. 382 and inc. 410 and inc 442 456 384 414 456 74 2 4 14 0.28 0.43 0.48 0.41 138 145 166 150 63 54 178 69 63 22 21 153 MTRC001 629 652 23 0.35 130 17 4 MTRC001 675 inc. 677 and inc. 734 754 684 740 79 7 6 0.24 0.37 0.40 115 150 161 69 57 122 18 8 45 MTRC001 762 inc. 812 836 835 74 23 0.32 0.42 142 144 115 74 31 44 MTRC083 95 inc. 132 146 146 51 14 0.30 0.36 123 133 40 17 10 10 MTRC083 159 inc. 160 and inc. 230 and inc. 252 and inc. 266 279 186 234 258 270 120 26 4 6 4 0.30 0.33 0.44 0.35 0.46 140 120 170 153 173 67 30 79 73 117 39 7 134 56 138 MTRC083 310 318 8 0.47 134 57 30 MTRC084 96 inc. 98 119 111 23 13 0.35 0.41 140 153 103 177 156 208 MTRC084 230 inc. 238 242 240 12 2 0.29 0.37 107 122 2 2 44 182 MTRC084 250 Inc. 260 275 264 25 4 0.27 0.43 107 157 7 18 1 4 MTRC084 291 310 19 0.29 93 5 2 MTRC085 96 inc. 177 and inc. 197 and inc. 233 250 188 213 235 154 11 16 2 0.26 0.41 0.36 0.44 125 158 132 187 56 108 20 206 25 38 32 84 MTRC085 259 274 15 0.26 125 54 24 MTRC086 102 113 11 0.35 140 62 12 MTRC086 142 152 10 0.40 154 27 46 MTRC086 197 inc. 199 that inc. 199 300 202 200 103 3 1 0.28 0.85 1.61 108 252 472 4 21 44 1 1 2 MTRC087 91 108 17 0.21 115 103 22 MTRC087 132 181 49 0.22 119 97 19 MTRC087 268 300 32 0.21 114 23 22 ASX:WMG www.westernmines.com.au 14 HoleID Easting (MGA51) Northing (MGA51) Depth (m) Azimuth Dip MTRC001 519403 6689301 934.1 272 -71 MTRC083 518907 6689004 318 270 -70 MTRC084 581897 6688505 318 270 -70 MTRC085 519211 6688500 300 270 -70 MTRC086 518900 6688194 300 270 -70 MTRC087 519203 6688202 300 270 -70 Table 2: Collar details for holes MTRC001 and MTRC083 to MTRC087 ASX RELEASE | BASAL TARGET ZONE ALONG MULGA TANK WESTERN MARGIN ASX:WMG www.westernmines.com.au 15 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 relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 Edition of the JORC Code. Caedmon consents to the inclusion in this announcement of the matters based on his information in the form and context in which it appears. DISCLAIMER Some of the statements appearing in this announcement may be in the nature of forward looking statements. You should be aware that such statements are only predictions and are subject to inherent risks and uncertainties. Those risks and uncertainties include factors and risks specific to the industries in which WMG operates and proposes to operate as well as general economic conditions, prevailing exchange rates and interest rates and conditions in the financial markets, among other things. Actual events or results may differ materially from the events or results expressed or implied in any forward looking statement. No forward looking statement is a guarantee or representation as to future performance or any other future matters, which will be influenced by a number of factors and subject to various uncertainties and contingencies, many of which will be outside WMG’s control. WMG does not undertake any obligation to update publicly or release any revisions to these forward looking statements to reflect events or circumstances after today's date or to reflect the occurrence of unanticipated events. No representation or