Announcement PDF 30 October 2026 QUARTERLY ACTIVITIES REPORT FOR THE PERIOD ENDED 30 SEPTEMBER 2026 HIGHLIGHTS  RC drilling at Snook returned 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  Infill and extension RC drilling at Kingfisher returned high-grade intercepts including:  23m @ 5.26g/t Au from 188m including 15m @ 7.65g/t Au from 192m  45m @ 1.24g/t Au from 114m including 3m @ 6.79g/t Au from 114m  12m @ 2.81g/t Au from 74m including 6m @ 5.26g/t Au from 79m  21m @ 1.36g/t Au from 130m including 4m @ 3.17g/t Au from 131m  6m @ 3.94g/t Au from 67m including 2m @ 9.14g/t Au from 67m  RC drilling at Howards confirmed an 800-metre southern extension to known gold mineralisation returning high grade intercepts including:  6m @ 5.57g/t Au from 70m including 3m @ 9.91g/t Au from 71m  9m @ 2.27g/t Au from 41m including 5m @ 3.54g/t Au from 41m  4m @ 4.65g/t Au from 70m including 1m @ 17.30g/t Au from 70m  5m @ 3.41g/t Au from 29m including 3m @ 5.41g/t Au from 30m  Infill and extension RC drilling at Heron South returned solid intercepts including:  6m @ 12.67g/t Au from 114m including 1m @ 58.70g/t Au from 114m  25m @ 1.79g/t Au from 84m including 4m @ 7.87g/t Au from 93m  12m @ 2.35g/t Au from 180m including 7m @ 3.50g/t Au from 180m  Shallow infill and extensional RC drilling at Melbourne Bitter highlighted the potential for significant resource expansion to the south, returning intercepts including:  21m @ 2.14g/t Au from 24m including 8m @ 3.64g/t Au from 31m  11m @ 1.78g/t Au from 35m including 4m @ 3.91g/t Au from 36m  12m @ 1.59g/t Au from 68m including 4m @ 3.87g/t Au from 75m  11m @ 1.40g/t Au from 27m including 2m @ 3.30g/t Au from 34m 2  Shallow infill and extensional RC drilling at Cobia, Alma May, Hawk and Swan returned the following best intercepts:  21m @ 2.08g/t Au from 76m including 15m @ 2.68g/t Au from 79m (Cobia)  10m @ 1.65g/t Au from 47m including 4m @ 3.40g/t Au from 53m (Cobia)  3m @ 5.16g/t Au from 43m (Cobia)  5m @ 2.79g/t Au from 26m including 1m @ 12.50g/t Au from 26m (Alma May)  5m @ 2.62g/t Au from 21m including 2m @ 5.22g/t Au from 22m (Alma May)  11m @ 1.07g/t Au from 68m including 4m @ 2.10g/t Au from 71m (Alma May)  6m @ 1.39g/t Au from 12m and 2m @ 4.07g/t Au from 8m (Alma May)  12m @ 2.30g/t Au from 140m including 6m @ 4.26g/t Au from 140m (Hawk)  5m @ 3.46g/t Au from 159m (Hawk)  16m @ 1.84g/t Au from 45m including 7m @ 3.03g/t Au from 46m (Swan)  6m @ 1.23g/t Au from 28m (Swan)  Follow up RC and diamond drilling is being planned at all 9 prospects.  Diamond drilling is continuing at the Kingfisher prospect, and RC drilling is continuing at Howards prior to moving to the Wyooda resource area (Kingston Town, Manikato, Think Big). Horizon Gold Limited (ASX : HRN) (‘Horizon’ or ‘Company’) is focussed on progressing its exploration and development activities at the 100%-owned Gum Creek Gold Project (‘Gum Creek’ or the ‘Project’) located in the Mid-West Region of Western Australia (Figure 1). Gum Creek has historically produced more than 1 million ounces of gold and currently hosts a gold resource of 37.97Mt @ 1.89g/t Au for 2.30 million ounces 1 . The Project currently covers 644km2 of granted tenure over the highly prospective and underexplored Gum Creek greenstone belt, which contains 37 open pit and three underground gold mines. Figure 1: Gum Creek Gold Project and surrounding gold projects and operating gold processing facilities. 1 Refer to Horizon Gold Limited ASX Announcement titled “Gum Creek Project Gold Resource Update” dated 4 November 2025. 3 During the quarter the Company continued deep diamond drilling at the Kingfisher prospect and completed infill and extensional RC resource drilling at Snook, Kingfisher, Howards, Heron South, Melbourne Bitter, Cobia, Alma May, Hawk and Swan. Wireframing for resource estimation work continued, along with further resource drill hole planning. Figure 2: Gum Creek Gold Project existing Mineral Resources, Potential Mineral Resources and Exploration Targets over simplified geology. 4 Exploration Results 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. The Company completed 25 RC holes for a total of 5,151m. Some of the 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) The program successfully extended the known gold mineralisation down plunge to the south beneath the Snook North and Snook South pits (Figures 3 & 4). 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 early in 2027. Figure 3: 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. 5 Figure 4: Snook cross section showing interpreted geology, mineralised zones and recent significant drill intercepts. Kingfisher Prospect The Kingfisher Prospect is located 3.5km south-southeast of the old Gidgee Mill and hosts an open cut MRE of 1.22Mt @ 2.01g/t Au for 78,900oz and an underground MRE of 1.04Mt @ 3.38g/t Au for 113,500oz. The Company completed 20 RC holes at Kingfisher for a total of 3,273m (Figures 5 & 6). The drilling returned numerous significant intercepts confirming the continuity of mineralisation in the “gap”, and highlighting the potential for further resource expansion along strike to the north:  23m @ 5.26g/t Au from 188m including 15m @ 7.65g/t Au from 192m (KFRC038)  45m @ 1.24g/t Au from 114m including 3m @ 6.79g/t Au from 114m (KFRC042)  12m @ 2.81g/t Au from 74m including 6m @ 5.26g/t Au from 79m (KFRC036)  21m @ 1.36g/t Au from 130m including 4m @ 3.17g/t Au from 131m (KFRC030)  6m @ 3.94g/t Au from 67m including 2m @ 9.14g/t Au from 67m (KFRC030)  2m @ 12.15g/t Au from 52m including 1m @ 23.40g/t Au from 52m (KFRC032)  9m @ 2.12g/t Au from 205m including 2m @ 6.74g/t Au from 205m (KFRC042)  10m @ 1.83g/t Au from 154m including 5m @ 3.08g/t Au from 157m (KFRC044)  11m @ 1.64g/t Au from 186m including 3m @ 4.20g/t Au from 186m (KFRC040)  9m @ 1.94g/t Au from 75m including 6m @ 2.74g/t Au from 78m (KFRC029)  14m @ 1.23g/t Au from 125m including 1m @ 13.90g/t Au from 125m (KFRC038)  11m @ 1.46g/t Au from 89m including 3m @ 2.26g/t Au from 97m (KFRC036) 6 Figure 5: Kingfisher drill hole plan showing all drill collars coloured by max. downhole gold (g/t) and recent drill hole gold intercepts over satellite image. Figure 6: Kingfisher cross section showing recent RC drilling intercepts, interpreted geology and Kingfisher open pit. 7 Further RC drilling along strike, up plunge, and down-dip of the 23m @ 5.26g/t Au intercept is planned with the aim of increasing the open pittable resource, improving resource confidence levels at the northern end of the Kingfisher and boosting the MRE update due for release early in 2027. Deep diamond drilling testing the extent of the newly discovered mineralised shoot to the north and infill drilling aimed at increasing resource confidence levels (inferred to indicated) within the upper and central high-grade shoots is continuing. Final results are pending. Howards Prospect The Howards Prospect is located ~27km southeast of the historic Gidgee mill. The MRE for the Howards deposit is 6.85Mt @ 1.11g/t Au for 245,300. The resource is currently defined over a 1.3km strike and is up to 50m wide. The Company completed 17 RC holes for a total of 1,624m, with the remaining holes aimed at extending the current gold resource along strike to the south (Figure 7). Significant intercepts included:  6m @ 5.57g/t Au from 70m including 3m @ 9.91g/t Au from 71m (HSRC023A)  9m @ 2.27g/t Au from 41m including 5m @ 3.54g/t Au from 41m (HSRC029)  4m @ 4.65g/t Au from 70m including 1m @ 17.30g/t Au from 70m (HSRC025)  5m @ 3.41g/t Au from 29m including 3m @ 5.41g/t Au from 30m (HSRC020)  10m @ 1.55g/t Au from 49m including 4m @ 3.28g/t Au from 50m (HSRC019) Gold mineralisation was intercepted in every drill hole on 100m spaced drill lines over an 800m strike extension to the south of the existing resource model. The results confirm the potential for a significant resource expansion at Howards. Infill resource drilling is currently underway prior to an MRE update for the Howards resource early in 2027. Three RC holes tested a VRIFY defined prospectivity target ~700m to the northeast of the main Howards mineralised zone. One of the holes drilled returned 2m @ 1.53g/t Au from 64m (HNRC001). The mineralisation is ~300m into the footwall of the Howards mineralisation and could represent an untested footwall lode. Follow-up drilling is being considered. 8 Figure 7: Howards drill hole plan showing all drill collars coloured by maximum downhole gold (g/t) and recent RC drill intercepts over interpreted geology. Heron South Prospect The Heron South Prospect is located 15km south-southeast of the historic Gidgee mill and has previously been mined by open cut methods. The current MRE for the Heron South deposit is 1.48Mt @ 1.66g/t Au for 78,900oz. The Company completed 15 RC holes at Heron South for a total of 2,892m (Figure 8). The drilling returned the following significant intercepts:  6m @ 12.67g/t Au from 114m including 1m @ 58.70g/t Au from 114m (HERC035)  25m @ 1.79g/t Au from 84m including 4m @ 7.87g/t Au from 93m (HERC028)  12m @ 2.35g/t Au from 180m including 7m @ 3.50g/t Au from 180m (HERC032)  21m @ 1.26g/t Au from 141m including 7m @ 2.55g/t Au from 145m (HERC029)  16m @ 1.42g/t Au from 185m including 4m @ 2.89g/t Au from 195m (HERC039)  14m @ 1.56g/t Au from 165m including 6m @ 2.87g/t Au from 170m (HERC030) 9  14m @ 1.48g/t Au from 82m including 3m @ 4.51g/t Au from 86m (HERC037)  17m @ 1.19g/t Au from 96m including 7m @ 2.46g/t Au from 103m (HERC038)  10m @ 1.55g/t Au from 145m including 3m @ 2.69g/t Au from 149m (HERC031) The program confirmed the continuity of mineralisation at depth beneath the Heron South pit and extended known gold mineralisation along strike to the south. Two diamond holes are being drilled to obtain structural information and determine controls on potential high grade plunging shoots and assist the planning of further resource expansion drilling. An updated MRE will be completed once the diamond drilling results have been received. Figure 8: Heron South drill hole plan showing all drill collars coloured by maximum downhole gold (g/t) and recent drill hole gold intercepts. 10 Melbourne Bitter Prospect The Melbourne Bitter deposit is located 26km north of the historic Gidgee Mill. The Melbourne Bitter MRE is currently 0.48Mt @ 1.39g/t Au for 21,300oz. Twelve resource extension and infill RC holes for 1,187m were completed (Figure 9). Significant assay results included:  21m @ 2.14g/t Au from 24m including 8m @ 3.64g/t Au from 31m (MBRC054)  11m @ 1.78g/t Au from 35m including 4m @ 3.91g/t Au from 36m (MBRC051)  12m @ 1.59g/t Au from 68m including 4m @ 3.87g/t Au from 75m (MBRC045)  7m @ 2.31g/t Au from 49m including 1m @ 13.10g/t Au from 50m (MBRC054)  11m @ 1.40g/t Au from 27m including 2m @ 3.30g/t Au from 34m (MBRC044)  26m @ 0.80g/t Au from 66m including 7m @ 2.06g/t Au from 67m (MBRC054) Figure 9: Melbourne Bitter drill hole plan showing all drill collars coloured by maximum downhole gold (g/t) and recent gold intercepts over satellite image. 11 Infill drilling confirmed existing grades and widths within the existing resource and extended mineralisation along strike to the south of the current block model with MBRC054 highlighting the potential for gold mineralisation to increase in width and grade to the south and west of all existing drilling. Shallow RC drilling is required within the highly prospective southern half of the prospecting licence which has not been drilled previously. This drilling will be completed prior to the next Melbourne Bitter MRE update early in 2027. 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 20 RC holes at Cobia for a total of 2,043m (Figure 10). The program infilled wide spaced gaps in shallow historic drilling with the aim of producing a maiden gold resource. The drilling returned the following significant intercepts:  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 10: Cobia drill hole plan showing all drill collars coloured by max. downhole gold and recent intercepts over satellite image. 12 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). Further drilling including diamond drilling along strike to the south of the Cobia pit is being planned, however a maiden MRE and pit optimisation work 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. The Company completed 14 RC holes for 964m to infill gaps in shallow historic drilling, confirm the continuity of mineralisation, and to deliver a maiden gold resource (Figure 11). Significant assay results 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)  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. 13 Figure 11: Alma May drill hole plan showing all drill collars coloured by max. downhole gold and recent gold intercepts over satellite image. Hawk Prospect The Hawk Prospect is located 5km south-southeast of the old Gidgee mill and was previously mined by open cut methods. The current MRE for Hawk is 0.76Mt @ 1.35g/t Au for 33,000oz. The Company completed 3 RC holes for a total of 552m. Significant intercepts included:  12m @ 2.30g/t Au from 140m including 6m @ 4.26g/t Au from 140m (HKRC026)  5m @ 3.46g/t Au from 159m (HKRC027) HKRC026 and HKRC027 successfully intersected the interpreted high-grade gold shoot that lies within the overall steep SW dipping 5m to 10m thick mineralised zone (Figure 12). 14 Figure 12: Hawk drill hole plan showing all drill collars coloured by maximum downhole gold (g/t Au), recent gold intercepts and historic intercepts (>40 GxM) over satellite image. Further RC drilling along strike and down-plunge of the 6m @ 4.26g/t Au intercept is planned with the aim of increasing the open pittable resource and improving resource confidence levels at depth. This drilling will be completed prior to an MRE update for the Hawk resource in the coming months. Swan Prospect The Swan deposit is located 700m east of the old Gidgee Mill. The Swan / Swift open cut MRE is currently 7.00Mt @ 1.85g/t Au for 415,600oz and the Swan underground MRE is 1.73Mt @ 4.19g/t Au for 233,700oz. Five RC holes for 424m were completed, returning the following significant intercepts:  16m @ 1.84g/t Au from 45m including 7m @ 3.03g/t Au from 46m (SBRC150)  6m @ 1.23g/t Au from 28m (SBRC147) 15 The results extended low grade mineralisation along strike to the north of the current resource model. Further shallow RC drilling is required along strike of SBRC146 and SBRC147. This drilling will be completed prior to the next Swan MRE update. Figure 1313: Swan drill hole plan showing all drill collars coloured by maximum downhole gold (g/t) and recent gold intercepts over satellite image. Assay results for diamond core extensions to three Swift RC pre-collars (SWRC005-007D) are still pending. Corporate Annual General Meeting The Company will be holding its Annual General Meeting on Thursday 19 November 2026 at 9.30am (AWST) in the Meeting Room of The Country Women’s Association of Western Australia, 1176 Hay Street, West Perth, WA 6005. Additional ASX Listing Rule Disclosures As required by ASX Listing Rule 5.3, the Company advises it spent $6,551,000 on exploration and evaluation activities during the quarter. The expenditure is predominantly related to costs associated with resource drilling, the Gum Creek Feasibility Study, resource estimation consultants, mine development costs, and ongoing tenement rents and rates. There was no mining development or production activities conducted during the quarter. The total amount paid to directors of the entity and their related parties and associates (Section 6 of Appendix 5B) was $140,000, encompassing the Managing Director’s salary, Non-Executive Directors’ fees and associated superannuation. 16 As at 30 September 2026, Horizon had a cash at hand balance of $16,945,000. Mining Tenements The status of the Company’s mining tenements as at 30 September 2026 are detailed in Appendix 1. This ASX announcement was authorised for release by the Horizon Board. For further information contact: Scott Williamson Managing Director and CEO info@horizongold.com.au About the Company Horizon Gold Limited (ASX: HRN) is an exploration company focused on its 100% owned Gum Creek Project in Western Australia (Figure 1). 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 ounces2 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 a Definitive Feasibility Study (DFS) 3 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 Production Target of 25.1Mt at 1.19 g/t Au for 962koz, underpinned by 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. 2 Refer to Horizon Gold Limited 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. 17 Horizon Gold Limited Mineral Resources Table A: Gum Creek Gold Resources as at 4 November 20254 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 20265 Notes: Ore Reserves are reported using a A$4,500 gold price basis for cut-off grade calculations Figures have been rounded. 4 Refer to Horizon Gold Ltd ASX announcement titled “Gum Creek Project Gold Resource Update” dated 4 November 2025. 5 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 18 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. 19 Forward Looking Statements: This ASX announcement may contain certain “f