Announcement PDF 12 October 2026 Excellent RC drilling intercepts returned across Snook, Cobia, and Alma May, including 44m @ 5.08g/t Au at Snook HIGHLIGHTS  RC drilling at Snook has returned numerous spectacular intercepts from the deepest drilling at the prospect to date including:  44m @ 5.08g/t Au from 145m including 11m @ 16.30g/t Au from 174m  14m @ 5.18g/t Au from 88m including 8m @ 8.81g/t Au from 90m  12m @ 5.72g/t Au from 135m including 5m @ 10.93g/t Au from 139m  14m @ 4.12g/t Au from 204m including 3m @ 15.33g/t Au from 205m  15m @ 3.35g/t Au from 158m including 3m @ 13.89g/t Au from 167m  27m @ 1.51g/t Au from 225m including 5m @ 6.35g/t Au from 229m  7m @ 4.22g/t Au from 161m including 5m @ 5.67g/t Au from 162m  18m @ 1.47g/t Au from 175m including 7m @ 2.12g/t Au from 175m  17m @ 1.28g/t Au from 137m including 5m @ 3.43g/t Au from 139m  6m @ 3.37g/t Au from 169m including 3m @ 5.97g/t Au from 169m  18m @ 1.11g/t Au from 236m and 12m @ 1.30g/t Au from 70m  4m @ 3.61g/t Au from 219m and 6m @ 2.12g/t Au from 143m  6m @ 2.36g/t Au from 263m and 5m @ 2.55g/t Au from 119m  Shallow infill RC drilling at Cobia has confirmed the continuity of mineralisation along strike to the south of the open pit returning several significant intercepts:  21m @ 2.08g/t Au from 76m including 15m @ 2.68g/t Au from 79m  10m @ 1.65g/t Au from 47m including 4m @ 3.40g/t Au from 53m  3m @ 5.16g/t Au from 43m  8m @ 1.23g/t Au from 52m including 3m @ 2.01g/t Au from 57m  Infill RC drilling north of the Alma May pit returned numerous significant intercepts:  5m @ 2.79g/t Au from 26m including 1m @ 12.50g/t Au from 26m  5m @ 2.62g/t Au from 21m including 2m @ 5.22g/t Au from 22m  13m @ 0.91g/t Au from 32m including 9m @ 1.13g/t Au from 36m  11m @ 1.07g/t Au from 68m including 4m @ 2.10g/t Au from 71m  10m @ 0.96g/t Au from 30m including 4m @ 1.93g/t Au from 36m  14m @ 0.72g/t Au from 2m including 4m @ 1.50g/t Au from 4m  6m @ 1.39g/t Au from 12m and 2m @ 4.07g/t Au from 8m  Follow up RC and diamond drilling is being planned at all 3 prospects ________________________________________________________________________________ 2 Horizon Gold Limited (ASX: HRN) (‘Horizon’ or ‘the Company’) is pleased to announce some spectacular gold intercepts returned from RC drilling at its 100% owned Gum Creek Gold Project (‘Gum Creek’ or ‘the Project’) located in the Mid-West Region of Western Australia. Final assay results for Reverse Circulation (RC) drilling completed at Snook, Cobia and Alma May have been received. Significant results are outlined below. Figure 1: Gum Creek Gold Project existing Mineral Resources, Potential Mineral Resources and Exploration Targets over simplified geology. Managing Director Scott Williamson said: “These outstanding RC results from Snook point to a larger open pit and potential for underground mining. Infill drilling at Alma May and Cobia is on track to deliver maiden resources over the coming months, adding further scale to Gum Creek's growing resource base. With follow-up drilling already underway across multiple prospects and further programs planned, we see meaningful scope to enhance project economics well beyond the recent DFS.” 3 Snook Prospect The Snook Prospect is located 24.5 kilometres north of the Gidgee Mill and hosts a current Mineral Resources Estimate (‘MRE’) of 0.92Mt @ 1.82g/t Au for 54,000oz (Table A). The resource is currently defined over a 550m strike and is up to 70m wide. The Company completed 25 RC holes for a total of 5,151m. The program was aimed at extending the current gold resource down plunge to the south beneath the Snook North and Snook South pits (Figures 2 & 3, Table C). Significant intercepts included:  44m @ 5.08g/t Au from 145m including 11m @ 16.30g/t Au from 174m (SKRC033)  14m @ 5.18g/t Au from 88m including 8m @ 8.81g/t Au from 90m (SKRC038)  12m @ 5.72g/t Au from 135m including 5m @ 10.93g/t Au from 139m (SKRC019)  14m @ 4.12g/t Au from 204m including 3m @ 15.33g/t Au from 205m (SKRC033)  15m @ 3.35g/t Au from 158m including 3m @ 13.89g/t Au from 167m (SKRC035)  27m @ 1.51g/t Au from 225m including 5m @ 6.35g/t Au from 229m (SKRC031)  7m @ 4.22g/t Au from 161m including 5m @ 5.67g/t Au from 162m (SKRC038)  18m @ 1.47g/t Au from 175m including 7m @ 2.12g/t Au from 175m (SKRC026)  17m @ 1.28g/t Au from 137m including 5m @ 3.43g/t Au from 139m (SKRC032)  6m @ 3.37g/t Au from 169m including 3m @ 5.97g/t Au from 169m (SKRC036)  18m @ 1.11g/t Au from 236m including 10m @ 1.69g/t Au from 237m (SKRC033)  12m @ 1.30g/t Au from 70m (SKRC038)  4m @ 3.61g/t Au from 219m (SKRC025)  6m @ 2.36g/t Au from 263m including 3m @ 4.39g/t Au from 263m (SKRC026)  5m @ 2.55g/t Au from 119m including 1m @ 9.02g/t Au from 119m (SKRC024)  6m @ 2.12g/t Au from 143m (SKRC018)  19m @ 0.64g/t Au from 188m including 8m @ 1.10g/t Au from 195m (SKRC035)  7m @ 1.73g/t Au from 179m including 3m @ 2.60g/t Au from 183m (SKRC027)  5m @ 2.39g/t Au from 167m (SKRC028)  1m @ 11.65g/t Au from 227m to EOH (SKRC020)  3m @ 3.29g/t Au from 171m (SKRC031)  4m @ 2.43g/t Au from 92m (SKRC016)  4m @ 2.35g/t Au from 209m (SKRC036) The program has successfully confirmed and further defined the previously interpreted steep south plunge to high-grade mineralisation beneath both Snook North and Snook South open pits. Gold mineralisation is associated with quartz veining within silica-sericite- carbonate-sulphide altered volcaniclastic sediments and basalt. High grade lodes are associated with and potentially controlled by the main north-northeast striking, steeply east dipping sediment/basalt contact which is exposed in the eastern wall of the Snook South open pit. The program included the deepest drilling at Snook to date and has returned the best gram x metre (GxM) intercept to date (44m @ 5.08g/t Au) with mineralisation now confirmed to ~230m below surface. The results confirm the potential for significant resource expansion at depth. Further drilling is planned prior to an MRE update for the deposit over the coming months. 4 Figure 2: Snook long section showing all drill intercept pierce points (coloured by gram x metres Au) and recent RC drill intercepts labelled over interpreted high-grade plunging gold shoots. Figure 3: Snook cross section showing interpreted geology, mineralised zones and recent significant drill intercepts. 5 Cobia Prospect The Cobia Prospect is located 26km north of the historic Gidgee mill and has previously been mined by open cut methods. There is no current MRE for the prospect. The Company completed twenty RC holes at Cobia for a total of 2,043m (Figure 4). The program infilled gaps in shallow historic drilling with the aim of producing a maiden gold resource. The drilling returned the following significant intercepts (Figures 4 & 5, Table D):  21m @ 2.08g/t Au from 76m including 15m @ 2.68g/t Au from 79m (CORC045)  10m @ 1.65g/t Au from 47m including 4m @ 3.40g/t Au from 53m (CORC047)  3m @ 5.16g/t Au from 43m (CORC050)  8m @ 1.23g/t Au from 52m including 3m @ 2.01g/t Au from 57m (CORC049)  6m @ 1.05g/t Au from 99m including 1m @ 3.71g/t Au from 99m (CORC047) Figure 4: Cobia drill hole plan showing all drill collars coloured by max. downhole gold and recent intercepts over satellite image. 6 Figure 5: Cobia cross section showing interpreted geology, mineralised zones and recent significant drill intercepts. The drilling confirmed the continuity of supergene mineralisation along strike to the south of the Cobia open pit and confirmed the similarity of primary gold mineralisation with that of Snook (just 1km to the south), being associated with quartz veining within silica-sericite- sulphide altered volcaniclastic sediments along a north-south striking, steeply east dipping clastic sediment / basalt contact (e.g. CORC045). Further drilling including diamond drilling along strike to the south of the Cobia pit is being planned, however a maiden MRE will be completed prior to completing any further drilling. Alma May Prospect The Alma May Prospect is located 26.5km north of the historic Gidgee Mill and has previously been mined by open cut methods. There is no current MRE for the prospect. Fourteen RC holes for 964m were completed to infill gaps in shallow historic drilling, confirm the continuity of mineralisation, and to deliver a maiden gold resource. Significant assay results (Figure 6 & 7, Table E) included:  5m @ 2.79g/t Au from 26m including 1m @ 12.50g/t Au from 26m (AMRC013)  5m @ 2.62g/t Au from 21m including 2m @ 5.22g/t Au from 22m (AMRC009)  13m @ 0.91g/t Au from 32m including 9m @ 1.13g/t Au from 36m (AMRC012)  11m @ 1.07g/t Au from 68m including 4m @ 2.10g/t Au from 71m (AMRC014) 7  10m @ 0.96g/t Au from 30m including 4m @ 1.93g/t Au from 36m (AMRC006)  14m @ 0.72g/t Au from 2m including 4m @ 1.50g/t Au from 4m (AMRC014)  6m @ 1.39g/t Au from 12m (AMRC005)  2m @ 4.07g/t Au from 8m (AMRC015)  10m @ 0.66g/t Au from 55m including 2m @ 1.45g/t Au from 62m (AMRC010)  5m @ 1.30g/t Au from 35m including 3m @ 1.87g/t Au from 36m (AMRC013) Drilling results confirmed steeply west dipping gold mineralisation associated with quartz veined limonitic saprolite, confirming previous drill results and highlighting the potential for a mineral resource along strike to the north of the open pit. Further shallow infill and extension RC drilling is being planned however a maiden resource estimate and subsequent pit optimisation work will be completed prior to undertaking further drilling. Figure 6: Alma May drill hole plan showing all drill collars coloured by max. downhole gold and recent gold intercepts over satellite image. 8 Figure 7: Alma May cross section showing interpreted mineralised zones and recent significant drill intercepts. About the Company Horizon Gold Limited (ASX: HRN) is an exploration company focused on its 100% owned Gum Creek Project in Western Australia (Figure 8). The Gum Creek Gold Project represents an exciting gold exploration and potential development opportunity that currently contains a Mineral Resource Estimate of 37.97Mt @ 1.89g/t Au for 2.30 million ounces (Table A) including Indicated and Inferred resource classifications in accordance with the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code 2012 edition). On 22 July 2026 the Company announced an Open Pit Definitive Feasibility Study1 (DFS) that outlined production, capital and operating costs and a detailed schedule for the engineering, procurement, construction, commissioning and ramp-up of a 2.4Mtpa gold mining and processing facility at the Gum Creek Gold Project. The DFS delivered a maiden Ore Reserve of 18.2Mt at 1.24 g/t Au for 728koz of contained gold reported in accordance with the JORC Code 2012 guidelines. It is anticipated the Project will deliver an average gold production of 88koz per annum over an initial 10-year mine life, peaking at 114koz per annum in year two, and delivering a total of 880koz gold recovered over the Life of Mine (LOM) with an AISC of A$2,995/oz. 1 Refer to Horizon Gold Limited ASX Announcement titled “Gum Creek Open Pit DFS Confirms Pathway for WA’s Next Major Gold Mine Development” dated 22 July 2026. 9 The Open Pit DFS confirms Gum Creek's potential to become Western Australia’s next major gold project development, underpinned by low operating costs, a high-margin production profile and strong growth potential from extensive underground mining opportunities and sulphide ore deposits which currently sit outside the DFS scope. Figure 8: Gum Creek Gold Project and surrounding gold resources and operating gold processing facilities. 10 Horizon Gold Limited Mineral Resources Table A: Gum Creek Gold Resources as at 4 November 20252 Resource Resource Date Cut-off grade (g/t Au) Indicated Inferred Total Tonnes Au (g/t) Gold (oz) Tonnes Au (g/t) Gold (oz) Tonnes Au (g/t) Gold (oz) Swan/Swift OC Nov-25 0.4 6,661,000 1.86 399,000 335,000 1.54 16,600 6,996,000 1.85 415,600 Swan UG* Nov-25 1.5 935,000 4.45 133,700 798,000 3.90 100,000 1,733,000 4.19 233,700 Swift UG* Nov-25 1.5 35,000 2.22 2,500 813,000 2.54 66,300 848,000 2.52 68,800 Wilsons UG* Nov-25 1.5 2,759,000 4.37 387,400 126,000 3.16 12,800 2,885,000 4.31 400,200 Howards Nov-25 0.4 6,095,000 1.13 221,800 751,000 0.97 23,500 6,846,000 1.11 245,300 Kingfisher OC Nov-25 0.6 1,139,000 2.05 75,100 79,000 1.50 3,800 1,218,000 2.01 78,900 Kingfisher UG* Nov-25 1.5 94,000 2.71 8,200 949,000 3.45 105,300 1,043,000 3.38 113,500 Heron May-23 0.6 330,000 2.11 22,400 1,822,000 1.51 88,200 2,152,000 1.60 110,600 Eagle Nov-25 0.4 817,000 1.27 33,400 1,202,000 1.29 50,000 2,019,000 1.28 83,400 Heron South May-23 0.8 720,000 1.79 41,400 761,000 1.53 37,500 1,481,000 1.66 78,900 Shiraz Nov-25 0.4 1,947,000 1.04 65,400 372,000 0.94 11,200 2,319,000 1.03 76,600 Wyooda** Nov-25 0.8 557,000 1.54 27,500 718,000 1.56 36,100 1,275,000 1.55 63,600 Snook Jul-22 0.8 75,000 2.57 6,200 846,000 1.76 47,800 921,000 1.82 54,000 Toedter Nov-25 0.6 905,000 1.31 38,200 99,000 1.32 4,200 1,004,000 1.31 42,400 Hawk Nov-25 0.6 591,000 1.38 26,200 167,000 1.27 6,800 758,000 1.35 33,000 Specimen Well Nov-25 0.6 431,000 1.49 20,600 114,000 1.31 4,800 545,000 1.45 25,400 Wedge Nov-25 0.6 427,000 1.42 19,500 56,000 2.83 5,100 483,000 1.58 24,600 Camel Bore Jul-22 0.8 379,000 1.47 17,900 100,000 1.21 3,900 479,000 1.42 21,800 Melbourne Bitter Nov-25 0.6 318,000 1.46 14,900 157,000 1.27 6,400 475,000 1.39 21,300 Hyperno-Reliance Nov-25 0.6 295,000 1.52 14,400 183,000 1.02 6,000 478,000 1.33 20,400 Kearrys May-23 0.6 450,000 1.24 18,000 46,000 1.35 2,000 496,000 1.25 20,000 Psi Jul-22 0.8 100,000 2.08 6,700 226,000 1.69 12,300 326,000 1.81 19,000 Deep South Reliance Nov-25 0.6 229,000 1.53 11,300 17,000 0.91 500 246,000 1.49 11,800 Orion Jul-22 0.8 69,000 1.49 3,300 182,000 1.40 8,200 251,000 1.43 11,500 Eagles Peak May-23 0.6 264,000 1.19 10,100 41,000 0.99 1,300 305,000 1.16 11,400 Wahoo Jul-22 0.8 - - - 258,000 1.25 10,400 258,000 1.25 10,400 Fangio May-23 0.6 99,000 1.32 4,200 30,000 1.35 1,300 129,000 1.33 5,500 Total 26,721,000 1.90 1,629,300 11,248,000 1.86 672,300 37,969,000 1.89 2,301,600 * Cut-off grades for Swan, Swift, Wilsons and Kingfisher underground Indicated and Inferred are 1.5g/t Au. ** Wyooda includes the Kingston Town, Think Big and Manikato resources which are within 600m and 200m of each other respectively. Note: Figures have been rounded. Table B: Gum Creek Gold Reserves as at 22 July 20263 Notes: Ore Reserves are reported using a A$4,500 gold price basis for cut-off grade calculations Figures have been rounded. 2 Refer to Horizon Gold Ltd ASX announcement titled “Gum Creek Project Gold Resource Update” dated 4 November 2025. 3 Refer to Horizon Gold Limited ASX Announcement titled “Gum Creek Open Pit DFS Confirms Pathway for WA’s Next Major Gold Mine Development” dated 22 July 2026. Deposit Classification Ore Tonnes (Mt) Grade (g/t) Au Metal (koz) Eagle Probable 0.8 0.99 25 Hawk Probable 0.7 1.07 25 Howards Probable 5.8 0.99 186 Hyperno-Reliance Probable 0.3 1.23 12 Kingfisher Probable 1.5 1.51 71 Swan/Swift Probable 8.6 1.42 392 Wedge Probable 0.5 1.04 18 Total Probable 18.2 1.24 728 11 Table C: Significant Drill Hole Intercepts (>2 GxM) – Snook RC Drilling Hole ID East North RL Dip Azi Depth From To Width Au g/t SKRC014 736307 7007561 545 -60 270 138 ABD SKRC015 736326 7007561 545 -60 270 178 144 151 7 0.62 SKRC016 736328 7007586 546 -60 270 179 92 96 4 2.43 SKRC017 736349 7007585 546 -60 270 197 NSI SKRC018 736367 7007585 547 -60 270 225 143 149 6 2.12 SKRC019 736369 7007610 547 -60 270 180 135 147 12 5.72 incl 139 144 5 10.93 SKRC020 736389 7007610 547 -60 270 228 227 228 EOH 1 11.65 SKRC021 736410 7007609 547 -60 270 156 ABD SKRC022 736347 7007560 546 -60 270 209 NSI SKRC023 736347 7007608 546 -60 270 179 107 109 2 1.00 SKRC024 736364 7007635 546 -54 270 179 119 124 5 2.55 incl 119 120 1 9.02 SKRC025 736398 7007636 547 -60 270 257 36 40 4 0.94* 219 223 4 3.61 incl 219 221 2 6.70 SKRC026 736418 7007635 547 -60 270 278 160 163 3 1.25 175 193 18 1.47 incl 175 182 7 2.12 241 243 2 0.96 263 269 6 2.36 incl 263 266 3 4.39 SKRC027 736454 7007686 545 -60 270 215 179 186 7 1.73 incl 183 186 3 2.60 209 214 5 0.66 SKRC028 736445 7007709 547 -60 270 245 167 172 5 2.39 202 204 2 1.21 SKRC029 736335 7007855 547 -60 270 173 136 142 6 0.41 145 153 8 0.61 incl 148 152 4 1.04 SKRC030 736351 7007855 547 -60 270 206 116 118 2 3.84 incl 116 117 1 6.85 SKRC031 736370 7007855 547 -60 270 260 159 163 4 0.69 171 174 3 3.29 189 196 7 0.45 incl 195 196 1 1.14 225 252 27 1.51 incl 229 234 5 6.35 255 257 2 1.57 SKRC032 736353 7007880 547 -60 270 185 116 123 7 0.61 137 154 17 1.28 incl 139 144 5 3.43 SKRC033 736370 7007880 547 -60 270 257 122 138 16 0.49 145 189 44 5.08 incl 174 185 11 16.30 204 218 14 4.12 incl 205 208 3 15.33 236 254 18 1.11 incl 237 247 10 1.69 SKRC034 736388 7007905 547 -60 270 220 ABD SKRC035 736382 7007930 547 -60 270 209 158 173 15 3.35 incl 167 170 3 13.89 188 207 19 0.64 incl 195 203 8 1.10 SKRC036 736382 7007955 548 -60 270 227 169 175 6 3.37 incl 169 172 3 5.97 12 Hole ID East North RL Dip Azi Depth From To Width Au g/t 195 198 3 1.73 209 213 4 2.35 SKRC037 736378 7007979 548 -60 270 173.5 ABD 165 167 2 1.82 SKRC038 736390 7008004 548 -60 270 197 70 82 12 1.30* 88 102 14 5.18* incl 90 98 8 8.81* 161 168 7 4.22 incl 162 167 5 5.67 Notes: All coordinates are GDA94 zone 50, all intercepts use a 0.2 g/t Au lower cut, no upper cut, 2m maximum internal dilution and all intercepts >2.0 GxM are reported. NSI = No Significant Intercept >2.0 GxM. * 2m composite samples. ABD = hole abandoned prior to target depth. Table D: Significant Drill Hole Intercepts (>2 GxM) – Cobia RC Drilling Hole ID East North RL Dip Azi Depth From To Width Au g/t CORC042 736400 7008831 550 -60 271 100 89 92 3 1.05 CORC043 736419 7008831 550 -60 271 135 83 87 4 0.88 92 95 3 1.36 126 132 6 0.35 CORC044 736401 7008930 551 -60 270 90 NSI CORC045 736417 7008935 550 -61 270 125 64 67 3 0.91 76 97 21 2.08 incl 79 94 15 2.68 CORC046 736389 7009031 551 -60 270 72 52 56 4 0.65 CORC047 736409 7009030 551 -60 271 113 47 57 10 1.65 incl 53 57 4 3.40 60 63 3 1.35 99 105 6 1.05 incl 99 100 1 3.71 CORC048 736380 7009131 551 -61 270 75 NSI CORC049 736400 7009131 550 -60 272 108 52 60 8 1.23 incl 57 60 3 2.01 93 96 3 0.76 CORC050 736419 7009133 550 -60 268 120 43 46 3 5.16 82 85 3 0.94 CORC051 736425 7009431 549 -60 272 90 61 65 4 0.52 CORC052 736446 7009429 549 -60 271 90 60 69 9 0.44 86 90 EOH 4 0.69 incl 89 90 EOH 1 2.36 CORC053 736465 7009429 549 -60 269 110 60 66 6 0.72 CORC054 736405 7009530 549 -60 270 75 NSI CORC055 736425 7009531 549 -59 271 90 NSI CORC056 736445 7009530 549 -61 272 108 NSI CORC057 736394 7009631 549 -60 272 78 NSI CORC058 736414 7009631 548 -60 272 108 51 53 2 1.66 CORC059 736420 7009730 549 -60 272 114 NSI CORC060 736439 7009730 549 -60 272 108 NSI CORC061 736435 7009630 548.7 -60 270 131 NSI Notes: All coordinates are GDA94 zone 50, all intercepts use a 0.2 g/t Au lower cut, no upper cut, 2m maximum internal dilution and all intercepts >2.0 GxM are reported. NSI = No Significant Intercept >2.0 GxM. Table E: Significant Drill Hole Intercepts (>2 GxM) – Alma May RC Drilling Hole ID East North RL Dip Azi Depth From To Width Au g/t AMRC003 736139 7009834 550 -55 112 50 NSI AMRC004 736125 7009840 551 -55 112 70 NSI AMRC005 736225 7010061 553 -55 270 60 12 18 6 1.39 13 Hole ID East North RL Dip Azi Depth From To Width Au g/t 23 28 5 0.74 incl 26 28 2 1.12 31 36 5 0.41 40 53 13 0.36 AMRC006 736240 7010060 553 -55 270 114 30 40 10 0.96 incl 36 40 4 1.93 AMRC007 736220 7010110 554 -55 270 45 NSI AMRC008 736234 7010111 554 -55 270 84 NSI AMRC009 736206 7010175 554 -55 90 45 21 26 5 2.62 incl 22 24 2 5.22 AMRC010 736190 7010201 554 -55 90 65 24 30 6 0.50 55 65 EOH 10 0.66 incl 62 64 2 1.45 AMRC011 736169 7010200 554 -55 90 95 30 35 5 0.52 AMRC012 736206 7010226 555 -55 90 55 9 10 1 2.10 32 45 13 0.91 incl 36 45 9 1.13 AMRC013 736190 7010250 555 -55 90 78 26 31 5 2.79 incl 26 27 1 12.5 35 40 5 1.3 incl 36 39 3 1.87 AMRC014 736171 7010250 555 -55 90 90 2 16 14 0.72* incl 4 8 4 1.50* 68 79 11 1.07 incl 71 75 4 2.10 AMRC015 736200 7010300 555 -55 90 48 8 10 2 4.07 AMRC016 736187 7010299 555 -55 90 65 NSI Notes: All coordinates are GDA94 zone 50, all intercepts use a 0.2 g/t Au lower cut, no upper cut, 2m maximum internal dilution and all intercepts >2.0 GxM are reported. NSI = No Significant Intercept >2.0 GxM. * 2m composite samples This ASX announcement was authorised for release by the Horizon Board. For further information contact: Scott Williamson Managing Director +61 8 6331 6092 info@horizongold.com.au 14 Competent Persons Statement: The information in this announcement that relates to exploration activities and exploration results is based on information compiled by Mr Leigh Ryan, who is a member of The Australasian Institute of Geoscientists. Mr Ryan is the General Manager - Exploration at Horizon Gold Limited and holds shares and options in the Company, Mr Ryan has sufficient experience, which is relevant to the style of mineralisation and type of deposit under consideration and to the activity which he is undertaking to qualify as a Competent Person as defined in the 2012 Edition of the "Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Ryan consents to the inclusion in the report of the matters based on information provided in the form and context in which it appears. No New Information or Data: The information in this announcement that relates to Horizon's production targets and financial forecasts for the Gum Creek Gold Project is extracted from Horizon’s ASX announcement titled “Gum Creek Open Pit DFS Confirms Pathway for WA’s Next Major Gold Mine Development” dated 22 July 2026 and which is available at www.asx.com.au. Horizon believes it has a reasonable basis for making the forward-looking statements in this presentation, including with respect to all production targets and financial forecasts, based on the information contained in that announcement. Horizon confirms that it is not aware of any new information or data that materially affects the production targets, or the financial forecast information, contained in that announcement of the Company’s Definitive Feasibility Study for the Gum Creek Gold Project ("DFS”) and confirms that all material assumptions underpinning the production targets and the financial forecast information in that announcement continue to apply and have not materially changed. Horizon confirms that it is not aware of any new information or data that materially affects the information included in Horizon announcement on 22 July 2026 and, in the case of estimates of Ore Reserves and Mineral Resources, that all material assumptions and technical parameters underpinning the estimates in the relevant ASX announcements continue to apply and have not materially changed. This announcement contains references to Ore Reserves and Mineral Resource estimates, all of which have been cross referenced to previous market announcements. The Company confirms that it is not aware of any additional information or data that materially affects the information included in the relevant market announcements and, in the case of estimates of Ore Reserves and Mineral Resources, that all material assumptions and technical parameters underpinning the estimates in the relevant market announcement continue to apply and have not materially changed. Production Target The Production Target (and forecast financial information derived from the Production Target) referred to in this announcement is underpinned by 76% Probable Ore Reserves, 18% Indicated Resource ounces outside of the Ore Reserves and 6% Inferred Resources ounces. The first 5 years of the Production Target is underpinned by approximately 97% Probable Ore Reserve ounces, and approximately 3% Inferred Mineral Resource ounces. There is a low level of geological confidence associated with Inferred Mineral Resources and there is no certainty that further exploration work will result in the determination of Indicated Mineral Resources or that the Production Target itself (or the forecast financial information) will be realised. The Company believes it has a reasonable basis to disclose a production target that includes some Inferred Mineral Resources, for example as the Inferred Resources are not a determining factor in the viability of the Gum Creek Gold Project. Importantly, the feasibility of the development scenario outlined in the DFS does not hinge on the current Inferred Mineral Resources. Also, the Inferred Mineral Resources do not feature as a significant proportion early in the mine plan. To achieve the range of outcomes anticipated in the DFS, an estimated A$350m of initial capital will be required. The Company believes the assumptions made are reasonable to enable it to obtain the requisite funding required to develop the Project, as detailed in the ASX announcement titled “Gum Creek Open Pit DFS Confirms Pathway for WA’s Next Major Gold Mine Development” dated 22 July 2026. Reference should also be made to other disclaimers included in that announcement. Investors should note that there is no certainty that Horizon will be able to raise the amount of funding when needed (nor any certainty as to the form such capital raising may take, such as equity, debt, hybrid and/or other capital raising, nor whether the Production Target, financial forecasts or other forward- looking information in this announcement may be achieved). It is also possible that such funding may only be available on terms that may be dilutive to or otherwise affect the value of Horizon’s existing shares. 15 Forward Looking Statements: This ASX announcement may contain certain “forward-looking statements” which may not have been based solely on historical facts but rather may be based on the Company’s current expectations about future events and results. Where the Company expresses or implies an expectation or belief as to future events or results, such expectation or belief is expressed in good faith and believed to have a reasonable basis. However, forward looking statements are subject to risks, uncertainties, assumptions and other factors, which could cause actual results to differ materially from future results expressed, projected or implied by such forward- looking statements. Such risks include, but are not limited to metals price volatility, currency fluctuations, as well as political and operational risks and governmental regulation and judicial outcomes. 16 APPENDIX 2: JORC TABLE 1 (SECTIONS 1 AND 2) Section 1 - Sampling Techniques and Data (Criteria in this section apply to all succeeding sections.) Criteria JORC Code explanation Commentary Sampling techniques • Nature and quality of sampling (eg cut channels, random chips, or specific 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 fire 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) drill holes were routinely sampled at 1m intervals down the hole. The upper sections of some holes were sampled at 2m intervals. • Samples were collected at the drill rig using an industry standard rig- mounted cone splitter to collect a nominal 2 - 3 kg sub sample in a numbered calico sample bag, with the remaining sample retained at the drill site for future resampling and/or metallurgical sampling if required. • Routine standard reference material, sample blanks, and sample duplicates were inserted/collected at every 25th sample in the sample sequence. • All RC samples were submitted to Australian Laboratory Services (ALS) in Perth for preparation (including pulverising) to produce a 50g sub-sample for analysis for gold by 50g Fire Assay. Pre-2014 Drillholes • All RC samples were collected at 1m intervals through the drill rig cyclone and then split via riffle and cone splitters. RC samples were typically dry. Composite samples were collected by tube sampling the bulk RC sample bags. • Initially assaying utilised the aqua regia process but most assays used in this report have been by fire assay with an AAS finish using the site laboratory or off-site laboratories. A 50g charge was generally used. • After the year 2000, samples (mainly grade control) were assayed at the accredited on-site laboratory at Gidgee using the Leachwell method. Leachwell cyanide (bottle-roll) assays are apparently more predictive of expected recoveries from Carbon-in-Pulp gold recovery plants, so provide a more realistic grade estimate. 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). • All RC holes were completed by reverse circulation (RC) drilling techniques using a DR05 SREPS SR650 drill rig and auxiliary compressor. • Drill rod diameter was 4.5” (114mm) and drill bit diameter w