Announcement PDF Western Mines Group Ltd (WMG or Company) (ASX:WMG) is pleased to update shareholders on geochemical assay results recently received for the Phase 5 drilling program at the Mulga Tank Ni-Co-Cu-PGE Project, on the Minigwal Greenstone Belt, in Western Australia’s Eastern Gold fi elds. 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 Phase 5 RC holes MTRC088 to MTRC094 at Mulga Tank • All holes show broad zones of nickel sulphide mineralisation - elevated Ni and S coincident with highly anomalous Cu and PGE: MTRC088 Cumulative 129m at 0.28% Ni, 132ppm Co, 40ppm Cu, 28ppb Pt+Pd with S:Ni 0.6* MTRC089 Cumulative 169m at 0.29% Ni, 127ppm Co, 21ppm Cu, 7ppb Pt+Pd with S:Ni 0.6* MTRC090 186m at 0.30% Ni, 145ppm Co, 101ppm Cu, 28ppb Pt+Pd from 109m S:Ni 1.5 MTRC091 Cumulative 172m at 0.29% Ni, 143ppm Co, 92ppm Cu, 19ppb Pt+Pd with S:Ni 0.9* MTRC092 219m at 0.26% Ni, 126ppm Co, 71ppm Cu, 12ppb Pt+Pd from 81m S:Ni 1.1* MTRC093 Cumulative 155m at 0.27% Ni, 132ppm Co, 46ppm Cu, 41ppb Pt+Pd with S:Ni 0.9* MTRC094 Cumulative 158m at 0.26% Ni, 131ppm Co, 47ppm Cu, 27ppb Pt+Pd with S:Ni 0.9 • Shallow higher grade results seen in a number of holes including: MTRC088 7m at 0.43% Ni, 152ppm Co, 88ppm Cu, 0.15g/t Pt+Pd from 127m MTRC089 6m at 0.52% Ni, 228ppm Co, 76ppm Cu, 64ppb Pt+Pd from 198m 1m at 1.08% Ni, 497ppm Co, 0.1% Cu, 25ppb Pt+Pd from 223m MTRC090 3m at 0.41% Ni, 238ppm Co, 576ppm Cu, 26ppb Pt+Pd from 135m 10m at 0.50% Ni, 191ppm Co, 208ppm Cu, 76ppb Pt+Pd from 157m 4m at 0.42% Ni, 233ppm Co, 366ppm Cu, 80ppb Pt+Pd from 180m 3m at 0.42% Ni, 191ppm Co, 191ppm Cu, 52ppb Pt+Pd from 198m MTRC091 5m at 0.77% Ni, 316ppm Co, 352ppm Cu, 57ppb Pt+Pd from 104m that inc. 2m at 1.29% Ni, 520ppm Co, 550ppm Cu, 0.1g/t Pt+Pd from 107m 2m at 0.50% Ni, 229ppm Co, 0.1% Cu, 21ppb Pt+Pd from 138m 1m at 0.49% Ni, 191ppm Co, 0.11% Cu, 21ppb Pt+Pd from 144m • The 32 holes from Phase 5 and previous Phase 4 drilling are in the process of being incorporated into a upgraded Mineral Resources Estimate being prepared for the project • EIS co-funded active seismic survey over the Mulga Tank Complex due to commence in the coming weeks FINAL PHASE 5 RC ASSAY RESULTS FROM MULGA TANK ASX RELEASE 6 OCTOBER 2026 Shares on Issue: 130.37m Share Price: $0.16 Market Cap: $20.86m Cash: $1.58m (30/06/26) Telephone: +61 475 116 798 Email: contact@westernmines.com.au Assay results have been received for holes MTRC088 to MTRC094, with results from all seven holes highlighting broad intersections of nickel sulphide mineralisation and showed further intervals with shallow higher grade results. Holes MTRC088 to MTRC094 mostly aimed to in fi ll and follow-up on previous drilling in the main body of the Mulga Tank Complex, both inside the current mineral resource estimate and also looking to extend the current resource to the south (Figure 1). Numerous intervals of visually logged disseminated nickel sulphide mineralisation coinciding with assay results showing elevated Ni and S, in combination with anomalous Cu and PGE were observed, including: MTRC088 42m at 0.30% Ni, 132ppm Co, 40ppm Cu, 49ppb Pt+Pd from 105m inc. 7m at 0.43% Ni, 152ppm Co, 88ppm Cu, 0.15g/t Pt+Pd from 127m 42m at 0.25% Ni, 125ppm Co, 20ppm Cu, 17ppb Pt+Pd from 162m 45m at 0.29% Ni, 137ppm Co, 59ppm Cu, 20ppb Pt+Pd from 255m* inc. 14m at 0.36% Ni, 138ppm Co, 54ppm Cu, 34ppb Pt+Pd from 276m Cumulative 129m at 0.28% Ni, 132ppm Co, 40ppm Cu, 28ppb Pt+Pd with S:Ni 0.6* MTRC089 19m at 0.24% Ni, 134ppm Co, 35ppm Cu, 32ppb Pt+Pd from 111m 23m at 0.28% Ni, 115ppm Co, 9ppm Cu, 0ppb Pt+Pd from 140m 127m at 0.29% Ni, 128ppm Co, 21ppm Cu, 5ppb Pt+Pd from 173m* inc. 6m at 0.52% Ni, 228ppm Co, 76ppm Cu, 64ppb Pt+Pd from 198m and inc. 1m at 1.08% Ni, 497ppm Co, 0.1% Cu, 25ppb Pt+Pd from 223m Cumulative 169m at 0.29% Ni, 127ppm Co, 21ppm Cu, 7ppb Pt+Pd with S:Ni 0.6* MTRC090 186m at 0.30% Ni, 145ppm Co, 101ppm Cu, 28ppb Pt+Pd from 109m S:Ni 1.5 inc. 3m at 0.41% Ni, 238ppm Co, 576ppm Cu, 26ppb Pt+Pd from 135m and inc. 10m at 0.50% Ni, 191ppm Co, 208ppm Cu, 76ppb Pt+Pd from 157m and inc. 4m at 0.42% Ni, 233ppm Co, 366ppm Cu, 80ppb Pt+Pd from 180m and inc. 3m at 0.42% Ni, 191ppm Co, 191ppm Cu, 52ppb Pt+Pd from 198m and inc. 28m at 0.37% Ni, 142ppm Co, 93ppm Cu, 36ppb Pt+Pd from 207m and inc. 20m at 0.36% Ni, 157ppm Co, 108ppm Cu, 23ppb Pt+Pd from 242m and inc. 5m at 0.43% Ni, 188ppm Co, 154ppm Cu, 34ppb Pt+Pd from 282m MTRC091 113m at 0.31% Ni, 146ppm Co, 99ppm Cu, 21ppb Pt+Pd from 104m inc. 5m at 0.77% Ni, 316ppm Co, 352ppm Cu, 57ppb Pt+Pd from 104m that inc. 2m at 1.29% Ni, 520ppm Co, 550ppm Cu, 0.1g/t Pt+Pd from 107m and inc. 2m at 0.50% Ni, 229ppm Co, 0.1% Cu, 21ppb Pt+Pd from 138m and inc. 1m at 0.49% Ni, 191ppm Co, 0.11% Cu, 21ppb Pt+Pd from 144m and inc. 2m at 0.33% Ni, 146ppm Co, 30ppm Cu, 0.56g/t Pt+Pd from 194m and inc. 1m at 1.24% Ni, 525ppm Co, 295ppm Cu, 0.15g/t Pt+Pd from 214m 59m at 0.26% Ni, 137ppm Co, 79ppm Cu, 15ppb Pt+Pd from 241m* inc. 9m at 0.46% Ni, 160ppm Co, 104ppm Cu, 27ppb Pt+Pd from 246m Cumulative 172m at 0.29% Ni, 143ppm Co, 92ppm Cu, 19ppb Pt+Pd with S:Ni 0.9* ASX:WMG www.westernmines.com.au 2 ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS MTRC092 219m at 0.27% Ni, 126ppm Co, 71ppm Cu, 12ppb Pt+Pd from 81m S:Ni 1.1* inc. 8m at 0.35% Ni, 156ppm Co, 181ppm Cu, 14ppb Pt+Pd from 247m inc. 15m at 0.33% Ni, 139ppm Co, 64ppm Cu, 6ppb Pt+Pd from 262m inc. 10m at 0.32% Ni, 152ppm Co, 117ppm Cu, 21ppb Pt+Pd from 281m MTRC093 104m at 0.28% Ni, 131ppm Co, 60ppm Cu, 48ppb Pt+Pd from 102m inc. 18m at 0.36% Ni, 151ppm Co, 147ppm Cu, 95ppb Pt+Pd from 116m inc. 4m at 0.46% Ni, 172ppm Co, 102ppm Cu, 0.4g/t Pt+Pd from 156m inc. 2m at 0.39% Ni, 165ppm Co, 210ppm Cu, 71ppb Pt+Pd from 166m 51m at 0.26% Ni, 130ppm Co, 18ppm Cu, 29ppb Pt+Pd from 214m 6m at 0.30% Ni, 161ppm Co, 53ppm Cu, 28ppb Pt+Pd from 294m* inc. 1m at 0.58% Ni, 237ppm Co, 137ppm Cu, 34ppb Pt+Pd from 299m* Cumulative 155m at 0.27% Ni, 132ppm Co, 46ppm Cu, 41ppb Pt+Pd with S:Ni 0.9* MTRC094 68m at 0.25% Ni, 118ppm Co, 39ppm Cu, 14ppb Pt+Pd from 90m inc. 1m at 0.37% Ni, 166ppm Co, 176ppm Cu, 0.32g/t Pt+Pd from 129m 26m at 0.23% Ni, 128ppm Co, 45ppm Cu, 18ppb Pt+Pd from 163m 23m at 0.31% Ni, 132ppm Co, 20ppm Cu, 8ppb Pt+Pd from 198m inc. 8m at 0.34% Ni, 140ppm Co, 43ppm Cu, 16ppb Pt+Pd from 198m 41m at 0.28% Ni, 154ppm Co, 74ppm Cu, 65ppb Pt+Pd from 239m inc. 4m at 0.33% Ni, 167ppm Co, 97ppm Cu, 0.11g/t Pt+Pd from 241m and inc. 15m at 0.34% Ni, 163ppm Co, 85ppm Cu, 93ppb Pt+Pd from 259m Cumulative 158m at 0.26% Ni, 131ppm Co, 47ppm Cu, 27ppb Pt+Pd with S:Ni 0.9 Commenting on the assay results, WMG Managing Director Caedmon Marriott said: “These seven holes from the Phase 5 program looked to follow-up on previous drilling within the main body of the Mulga Tank Complex, both within the current Mineral Resource Estimate and also to the south where Phase 4 and 5 drilling has extended known mineralisation. All seven holes showed broad zones of mineralisation, with MTRC090 and MTRC091 returning the strongest results with multiple shallow intersections of higher grade ~0.4% Ni results - MTRC090 186m at 0.30% Ni from 109m including a number of ~0.4% Ni intervals and MTRC091 113m at 0.31% Ni from 104m with 5m at 0.77% Ni from 104m including 2m at 1.29% Ni. The 32 holes from the Phase 4 and 5 programs will be incorporated into a new Mineral Resource Estimate in the next couple of weeks. This will hopefully upgrade and expand on the original Resource based on 58 holes up until Phase 3. The results of the updated Mineral Resource will feed into Scoping Study work. Our EIS co-funded seismic survey is planned to commence in the next few weeks and the team will mobilise to site once shire roads reopen after recent rain in the area.” ASX:WMG www.westernmines.com.au 3 ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS 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 signi fi cant nickel sulphide mineralisation and an extensive nickel sulphide mineral system within the Mulga Tank Ultrama fi c Complex. WMG has undertaken a combination of both diamond and reverse circulation (RC) drilling. With this two pronged approach, RC is used to in fi ll and prove up the extent of shallow disseminated nickel sulphide mineralisation, de fi ned 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. ASX:WMG www.westernmines.com.au 4 Figure 1: WMG Phase 5 results MTRC088 to MTRC094 ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS HIGH MGO ADCUMULATE DUNITE Assay results for MTRC088 averaged 47.3% MgO and 0.20% Al2O3 (volatile free) over the 232m ultrama fi c portion of the hole, MTRC089 averaged 48.2% MgO and 0.26% Al2O3 (volatile free) over 238m of ultrama fi c, MTRC090 averaged 47.0% MgO and 0.29% Al2O3 (volatile free) over 240m of ultrama fi c, MTRC091 averaged 41.5% MgO and 0.24% Al2O3 over 236m of ultrama fi c, MTRC092 averaged 41.1% MgO and 0.29% Al2O3 over 235m of ultrama fi c, MTRC093 averaged 40.5% MgO and 0.32% Al2O3 over 216m of ultrama fi c and MTRC094 averaged 46.3% MgO and 0.52% Al2O3 (volatile free) over 220m of ultrama fi c (Note: MTRC091, MTRC092 and MTRC093 results were not calculated as volatile free as LOI results had not been received at time of writing). 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%. 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. However, signi fi cant intersections of >1% Ni as sulphide mineralisation seen in previous results, provide evidence and support that Mulga Tank is actually more likely a ‘Hybrid’ Type 1/2 system more akin to Perseverance. 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 af fi nity for sulphide (chalcophile), in combination with S (and the S:Ni ratio) as geochemical indicators to con fi rm the presence of active magmatic sulphide processes and the geochemical signature of nickel sulphide mineralisation. The geochemical assay results for these four holes demonstrate signi fi cant evidence for “live” magmatic sulphide chemical processes and show a number of broad zones 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 de fi ned 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. MTRC088 42m at 0.30% Ni, 132ppm Co, 40ppm Cu, 49ppb Pt+Pd from 105m inc. 7m at 0.43% Ni, 152ppm Co, 88ppm Cu, 0.15g/t Pt+Pd from 127m 42m at 0.25% Ni, 125ppm Co, 20ppm Cu, 17ppb Pt+Pd from 162m 45m at 0.29% Ni, 137ppm Co, 59ppm Cu, 20ppb Pt+Pd from 255m* inc. 14m at 0.36% Ni, 138ppm Co, 54ppm Cu, 34ppb Pt+Pd from 276m Cumulative 129m at 0.28% Ni, 132ppm Co, 40ppm Cu, 28ppb Pt+Pd with S:Ni 0.6* * Ending in mineralisation ASX:WMG www.westernmines.com.au 5 ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS MTRC089 19m at 0.24% Ni, 134ppm Co, 35ppm Cu, 32ppb Pt+Pd from 111m 23m at 0.28% Ni, 115ppm Co, 9ppm Cu, 0ppb Pt+Pd from 140m 127m at 0.29% Ni, 128ppm Co, 21ppm Cu, 5ppb Pt+Pd from 173m* inc. 6m at 0.52% Ni, 228ppm Co, 76ppm Cu, 64ppb Pt+Pd from 198m and inc. 1m at 1.08% Ni, 497ppm Co, 0.1% Cu, 25ppb Pt+Pd from 223m Cumulative 169m at 0.29% Ni, 127ppm Co, 21ppm Cu, 7ppb Pt+Pd with S:Ni 0.6* MTRC090 186m at 0.30% Ni, 145ppm Co, 101ppm Cu, 28ppb Pt+Pd from 109m S:Ni 1.5 inc. 3m at 0.41% Ni, 238ppm Co, 576ppm Cu, 26ppb Pt+Pd from 135m and inc. 10m at 0.50% Ni, 191ppm Co, 208ppm Cu, 76ppb Pt+Pd from 157m and inc. 4m at 0.42% Ni, 233ppm Co, 366ppm Cu, 80ppb Pt+Pd from 180m and inc. 3m at 0.42% Ni, 191ppm Co, 191ppm Cu, 52ppb Pt+Pd from 198m and inc. 28m at 0.37% Ni, 142ppm Co, 93ppm Cu, 36ppb Pt+Pd from 207m and inc. 20m at 0.36% Ni, 157ppm Co, 108ppm Cu, 23ppb Pt+Pd from 242m and inc. 5m at 0.43% Ni, 188ppm Co, 154ppm Cu, 34ppb Pt+Pd from 282m ASX:WMG www.westernmines.com.au 6 Figure 2: MTRC088 Co, Cu, S and Pt+Pd Figure 3: MTRC089 Co, Cu, S and Pt+Pd ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS MTRC091 113m at 0.31% Ni, 146ppm Co, 99ppm Cu, 21ppb Pt+Pd from 104m inc. 5m at 0.77% Ni, 316ppm Co, 352ppm Cu, 57ppb Pt+Pd from 104m that inc. 2m at 1.29% Ni, 520ppm Co, 550ppm Cu, 0.1g/t Pt+Pd from 107m and inc. 2m at 0.50% Ni, 229ppm Co, 0.1% Cu, 21ppb Pt+Pd from 138m and inc. 1m at 0.49% Ni, 191ppm Co, 0.11% Cu, 21ppb Pt+Pd from 144m and inc. 2m at 0.33% Ni, 146ppm Co, 30ppm Cu, 0.56g/t Pt+Pd from 194m and inc. 1m at 1.24% Ni, 525ppm Co, 295ppm Cu, 0.15g/t Pt+Pd from 214m 59m at 0.26% Ni, 137ppm Co, 79ppm Cu, 15ppb Pt+Pd from 241m* inc. 9m at 0.46% Ni, 160ppm Co, 104ppm Cu, 27ppb Pt+Pd from 246m Cumulative 172m at 0.29% Ni, 143ppm Co, 92ppm Cu, 19ppb Pt+Pd with S:Ni 0.9* * Ending in mineralisation MTRC092 219m at 0.27% Ni, 126ppm Co, 71ppm Cu, 12ppb Pt+Pd from 81m S:Ni 1.1* inc. 8m at 0.35% Ni, 156ppm Co, 181ppm Cu, 14ppb Pt+Pd from 247m inc. 15m at 0.33% Ni, 139ppm Co, 64ppm Cu, 6ppb Pt+Pd from 262m inc. 10m at 0.32% Ni, 152ppm Co, 117ppm Cu, 21ppb Pt+Pd from 281m * Ending in mineralisation ASX:WMG www.westernmines.com.au 7 Figure 4: MTRC090 Co, Cu, S and Pt+Pd Figure 5: MTRC091 Co, Cu, S and Pt+Pd ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS MTRC093 104m at 0.28% Ni, 131ppm Co, 60ppm Cu, 48ppb Pt+Pd from 102m inc. 18m at 0.36% Ni, 151ppm Co, 147ppm Cu, 95ppb Pt+Pd from 116m inc. 4m at 0.46% Ni, 172ppm Co, 102ppm Cu, 0.4g/t Pt+Pd from 156m inc. 2m at 0.39% Ni, 165ppm Co, 210ppm Cu, 71ppb Pt+Pd from 166m 51m at 0.26% Ni, 130ppm Co, 18ppm Cu, 29ppb Pt+Pd from 214m 6m at 0.30% Ni, 161ppm Co, 53ppm Cu, 28ppb Pt+Pd from 294m* inc. 1m at 0.58% Ni, 237ppm Co, 137ppm Cu, 34ppb Pt+Pd from 299m* Cumulative 155m at 0.27% Ni, 132ppm Co, 46ppm Cu, 41ppb Pt+Pd with S:Ni 0.9* * Ending in mineralisation MTRC094 68m at 0.25% Ni, 118ppm Co, 39ppm Cu, 14ppb Pt+Pd from 90m inc. 1m at 0.37% Ni, 166ppm Co, 176ppm Cu, 0.32g/t Pt+Pd from 129m 26m at 0.23% Ni, 128ppm Co, 45ppm Cu, 18ppb Pt+Pd from 163m 23m at 0.31% Ni, 132ppm Co, 20ppm Cu, 8ppb Pt+Pd from 198m inc. 8m at 0.34% Ni, 140ppm Co, 43ppm Cu, 16ppb Pt+Pd from 198m 41m at 0.28% Ni, 154ppm Co, 74ppm Cu, 65ppb Pt+Pd from 239m inc. 4m at 0.33% Ni, 167ppm Co, 97ppm Cu, 0.11g/t Pt+Pd from 241m and inc. 15m at 0.34% Ni, 163ppm Co, 85ppm Cu, 93ppb Pt+Pd from 259m Cumulative 158m at 0.26% Ni, 131ppm Co, 47ppm Cu, 27ppb Pt+Pd with S:Ni 0.9 ASX:WMG www.westernmines.com.au 8 Figure 6: MTRC092 Co, Cu, S and Pt+Pd Figure 7: MTRC093 Co, Cu, S and Pt+Pd ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS DISCUSSION Assay results have now been received for the fi nal batch of RC holes of the Phase 5 drilling program, with just two shallow diamond holes MTRC076 and MTRC077 outstanding. These seven RC holes were predominantly follow-up and in fi ll holes within the current Mineral Resource area and further to the south where Phase 4 and Phase 5 drilling has shown extensions to known mineralisation. All seven holes returned broad zones of mineralisation with MTRC090 and MTRC091 showing the the best results, and MTRC092 also demonstrating a signi fi cant continuous mineralised interval of 216m at 0.27% Ni from 81m with S:Ni 1.1. Holes MTRC090 and MTRC091 contained numerous shallow higher grade results of ~0.4% Ni with MTRC091 also returning a couple of intersections of >1% Ni: MTRC090 3m at 0.41% Ni, 238ppm Co, 576ppm Cu, 26ppb Pt+Pd from 135m 10m at 0.50% Ni, 191ppm Co, 208ppm Cu, 76ppb Pt+Pd from 157m 4m at 0.42% Ni, 233ppm Co, 366ppm Cu, 80ppb Pt+Pd from 180m 3m at 0.42% Ni, 191ppm Co, 191ppm Cu, 52ppb Pt+Pd from 198m 28m at 0.37% Ni, 142ppm Co, 93ppm Cu, 36ppb Pt+Pd from 207m 20m at 0.36% Ni, 157ppm Co, 108ppm Cu, 23ppb Pt+Pd from 242m 5m at 0.43% Ni, 188ppm Co, 154ppm Cu, 34ppb Pt+Pd from 282m MTRC091 5m at 0.77% Ni, 316ppm Co, 352ppm Cu, 57ppb Pt+Pd from 104m that inc. 2m at 1.29% Ni, 520ppm Co, 550ppm Cu, 0.1g/t Pt+Pd from 107m 2m at 0.50% Ni, 229ppm Co, 0.1% Cu, 21ppb Pt+Pd from 138 1m at 0.49% Ni, 191ppm Co, 0.11% Cu, 21ppb Pt+Pd from 144m 2m at 0.33% Ni, 146ppm Co, 30ppm Cu, 0.56g/t Pt+Pd from 194m 1m at 1.24% Ni, 525ppm Co, 295ppm Cu, 0.15g/t Pt+Pd from 214m 9m at 0.46% Ni, 160ppm Co, 104ppm Cu, 27ppb Pt+Pd from 246m These two holes were designed to in fi ll drilling in the northwestern part of the current resource and hope to increase drilling density to extend Indicated Resource in this area. Higher grade results are seen in a number of holes surrounding MTRC090 and MTRC091 including MTRC009, MTRC024 and MTRC025: ASX:WMG www.westernmines.com.au 9 Figure 8: MTRC094 Co, Cu, S and Pt+Pd ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS MTRC009 28m at 0.38% Ni, 158ppm Co, 87ppm Cu, 39ppb Pt+Pd from 121m 7m at 0.39% Ni, 161ppm Co, 107ppm Cu, 34ppb Pt+Pd from 161m MTRC024 5m at 0.51% Ni, 367ppm Co, 714ppm Cu, 76ppb Pt+Pd from 202m that inc. 1m at 1.28% Ni, 890ppm Co, 427ppm Cu, 37ppb Pt+Pd from 202m 44m at 0.44% Ni, 172ppm Co, 71ppm Cu, 18ppb Pt+Pd from 241m that inc. 3m at 2.19% Ni, 777ppm Co, 597ppm Cu, 9ppb Pt+Pd from 253m which inc. 1m at 4.51% Ni, 0.16% Co, 0.14% Cu, 16ppb Pt+Pd from 253m MTRC025 7m at 0.40% Ni, 177ppm Co, 158ppm Cu, 31ppb Pt+Pd from 192m 17m at 0.38% Ni, 172ppm Co, 103ppm Cu, 53ppb Pt+Pd from 254m The Company’s initial Mineral Resource Estimate for Mulga Tank (ASX, Mulga Tank Mineral Resource Over 5Mt Contained Nickel, 10 April 2025) was based on 58 RC holes and 7 diamond holes up until the Phase 3 drilling campaign. The results from a further 32 holes from the Phase 4 and Phase 5 drilling are being incorporated into an updated Mineral Resource over the next few weeks. This upgraded Resource will form the basis of a mine plan to feed into a Scoping Study the Company is aiming to produce for the project. ASX:WMG www.westernmines.com.au 10 Figure 9: Higher grade assay results around MTRC090 and MTRC091 ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS 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 Ultrama fi c 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 Ultrama fi c Complex and its emplacement within the Minigwal Greenstone Belt to aid targeting of the basal contact for Perseverance-style massive nickel sulphide deposits. The seismic contractor will mobilise to site next week once shire roads have reopened after closure due to recent rainfall in the area. The survey is anticipated to take around 3 weeks to complete. The Company looks forward to updating shareholders on the progress of the seismic survey and ongoing resource modelling and Scoping Study work. 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 11 This announcement has been authorised for release to the ASX by Dr Caedmon Marriott, Managing Director ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS APPENDIX ASX:WMG www.westernmines.com.au 12 Table 1: Signi fi cant intersections for holes MTRC088 to MTRC094 HoleID From (m) To (m) Interval (m) Ni (%) Co (ppm) Cu (ppm) Pt + Pd (ppb) MTRC088 105 inc. 127 147 134 42 7 0.30 0.43 132 152 40 88 49 148 MTRC088 162 204 42 0.25 125 20 17 MTRC088 265 inc. 276 300 290 45 14 0.29 0.36 137 138 59 54 20 34 MTRC089 111 130 19 0.24 134 35 32 MTRC089 140 163 23 0.28 115 9 0 MTRC089 173 inc. 198 and inc. 223 300 204 224 127 6 1 0.29 0.52 1.08 128 228 497 21 76 928 5 64 25 MTRC090 109 inc. 135 and inc. 157 and inc. 180 and inc. 198 and inc. 207 and inc. 242 and inc. 282 295 138 167 184 201 235 262 287 186 3 10 4 3 28 20 5 0.30 0.41 0.50 0.42 0.42 0.37 0.36 0.43 145 238 191 233 191 142 157 188 101 576 208 366 191 93 108 154 28 26 76 80 52 36 23 34 MTRC091 104 inc. 104 that inc. 107 and inc. 138 and inc. 144 and inc. 194 and inc. 214 217 109 109 140 145 196 215 113 5 2 2 1 2 1 0.31 0.77 1.29 0.50 0.49 0.33 1.24 146 316 520 229 229 146 525 99 352 550 995 1060 30 295 21 57 103 21 21 556 148 MTRC091 241 inc. 246 300 255 59 9 0.26 0.39 137 160 79 104 15 27 MTRC092 81 inc. 247 and inc. 262 and inc.281 300 255 277 291 219 8 15 10 0.27 0.35 0.33 0.32 126 156 130 152 71 181 64 117 12 14 6 21 MTRC093 102 inc. 116 and inc.156 and inc. 166 206 134 160 168 104 18 4 2 0.28 0.36 0.46 0.39 131 151 172 165 60 147 102 210 48 95 397 71 MTRC093 214 265 51 0.26 130 18 29 MTRC093 294 inc. 299 300 300 6 1 0.30 0.58 161 237 53 137 28 34 MTRC094 90 inc. 129 158 130 68 1 0.25 0.37 118 166 39 176 14 315 MTRC094 163 189 26 0.23 128\ 45 18 MTRC094 198 inc. 198 221 206 23 8 0.31 0.34 132 140 20 43 8 16 MTRC094 239 inc. 241 and inc. 259 280 245 274 41 4 15 0.28 0.33 0.34 154 167 163 74 97 85 65 110 93 ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS ASX:WMG www.westernmines.com.au 13 HoleID Easting (MGA51) Northing (MGA51) Depth (m) Azimuth Dip MTRC088 520148 6688499 300 270 -70 MTRC089 520364 6688509 300 270 -70 MTRC090 520557 6689293 300 270 -70 MTRC091 520546 6689111 300 270 -70 MTRC092 520626 6688047 300 270 -70 MTRC093 520412 6688111 300 270 -70 MTRC094 520350 6688040 300 270 -70 Table 2: Collar details for holes MTRC088 to MTRC094 ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS ASX:WMG www.westernmines.com.au 14 ABOUT WMG Western Mines Group Ltd (ASX:WMG) is a mineral exploration company driven by the goal to create signi fi cant 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 fl agship project is the Mulga Tank Ni-Co-Cu-PGE Project, a major ultrama fi c complex found on the under-explored Minigwal Greenstone Belt (100% WMG). WMG’s exploration work has discovered a signi fi cant nickel sulphide mineral system and is considered highly prospective for globally signi fi cant 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 diversi fi ed 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 suf fi cient 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 de fi ned 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 speci fi c 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 fi nancial 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 in fl uenced 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 re fl ect events or circumstances after today's date or to re fl ect the occurrence of unanticipated events. No representation or warranty, express or implied, is made as to the fairness, accuracy, completeness or correctness of the information, opinions or conclusions contained in this announcement. To the maximum extent permitted by law, none of WMG, its Directors, employees, advisors or agents, nor any other person, accepts any liability for any loss arising from the use of the information contained in this announcement. You are cautioned not to place undue reliance on any forward looking statement. The forward looking statements in this announcement re fl ect views held only as at the date of this announcement. Western Mines Group Ltd ACN 640 738 834 Unit 10, 448 Roberts Road Subiaco WA 6008 Board Rex Turkington Non-Executive Chairman Dr Caedmon Marriott Managing Director Francesco Cannavo Non-Executive Director Dr Benjamin Grguric Technical Director Capital Structure Shares: 130.37m Options: 25.70m Share Price: $0.16 Market Cap: $20.86m Cash (30/06/26): $1.58m Follow us @westernmines Western Mines Group ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS MULGA TANK PROJECT JORC CODE, 2012 EDITION - TABLE 1 SECTION 1: SAMPLING TECHNIQUES AND DATA Criteria JORC Code explanation Commentary Sampling techniques • Nature and quality of sampling (eg cut channels, random chips, or speci fi c specialised industry standard measurement tools appropriate to the minerals under investigation, such as down hole gamma sondes, or handheld XRF instruments, etc). These examples should not be taken as limiting the broad meaning of sampling. • Include reference to measures taken to ensure sample representivity and the appropriate calibration of any measurement tools or systems used. • Aspects of the determination of mineralisation that are Material to the Public Report. • In cases where ‘industry standard’ work has been done this would be relatively simple (eg ‘reverse circulation drilling was used to obtain 1 m samples from which 3 kg was pulverised to produce a 30 g charge for fi re assay’). In other cases more explanation may be required, such as where there is coarse gold that has inherent sampling problems. Unusual commodities or mineralisation types (eg submarine nodules) may warrant disclosure of detailed information. • Reverse circulation (RC) drilling was completed using standard industry best practice • Individual 1m samples were collected directly from the rig sampling system. Samples were crushed and pulverised to produce a sub- sample for analysis by either multi-element ICP-AES (ME-ICP61 and ME-ICP41), precious metals fi re assay (Au-AA25 or PGM-ICP23) and loss on ignition at 1,000°C (ME-GRA05) Drilling techniques • Drill type (eg core, reverse circulation, open-hole hammer, rotary air blast, auger, Bangka, sonic, etc) and details (eg core diameter, triple or standard tube, depth of diamond tails, face-sampling bit or other type, whether core is oriented and if so, by what method, etc). • Reverse circulation percussion drilling rig with a 5.25inch face sampling bit Drill sample recovery • Method of recording and assessing core and chip sample recoveries and results assessed. • Measures taken to maximise sample recovery and ensure representative nature of the samples. • Whether a relationship exists between sample recovery and grade and whether sample bias may have occurred due to preferential loss/gain of fi ne/ coarse material. • Standard drilling techniques using “best practice” to maximise sample recovery • Information not available to assess relationship between sample recovery and grade ASX:WMG www.westernmines.com.au 15 ASX RELEASE | FINAL MULGA TANK PHASE 5 RC ASSAY RESULTS Logging • Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. • Whether logging is qualitative or qu