Announcement PDF 30 July 2026 QUARTERLY ACTIVITIES REPORT FOR THE PERIOD ENDED 30 JUNE 2026 HIGHLIGHTS  Open Pit Definitive Feasibility Study 1 delivers a robust production target and compelling financial outcomes for the 100% owned Gum Creek Gold Project:  Average annual gold production target of 98kozpa over the first five years and 880koz produced over a 10 year mine life, with first gold scheduled for H2 2028  Pre-production capital cost of A$350m, including mine development, process plant and associated infrastructure (incl. contingency and commissioning)  Pre-tax free cash flow of A$1,854m, NPV5 of A$1,307m and IRR of 53.1%, based on a gold price of A$5,500/oz, delivering a 23-month payback from first production  Strong margins, with an All-in Sustaining Cost (AISC) of A$2,995/oz  Approvals process on track for a Final Investment Decision (FID) in Q2 2027  Significant upside to grow production and extend mine life by bringing free- milling underground ore and sulphide deposits into the mine plan  Diamond drilling at the Omega and Kingfisher prospects return significant intercepts including:  14m @ 2.87g/t Au from 337m including 8m @ 4.60g/t Au from 342m (Omega)  5m @ 3.81g/t Au from 325m (Omega)  5m @ 3.07g/t Au from 374m (Omega)  5m @ 2.42g/t Au from 338m including 3m @ 3.56g/t Au from 338m (Kingfisher)  Reverse Circulation drilling also returns numerous significant intercepts including:  6m @ 5.13g/t Au from 95m including 2m @ 14.7g/t Au from 98m (Swift)  5m @ 4.28g/t Au from 146m including 2m @ 10.28g/t Au from 146m (Swift)  3m @ 6.13g/t Au from 123m including 1m @ 17.6g/t Au from 123m (Swift)  3m @ 6.62g/t Au from 43m including 1m @ 16.35g/t Au from 43m (Eagle)  13m @ 1.50g/t Au from 34m including 6m @ 2.77g/t Au from 34m (Eagle)  8m @ 2.36g/t Au from 58m including 4m @ 4.47g/t Au from 58m (Eagle)  4m @ 6.19g/t Au from 75m to EOH (Goldfinch)  3m @ 5.11g/t Au from 73m (Goldfinch) 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. 2  Deep infill and extensional resource diamond drilling at Kingfisher and Swan is continuing along with RC drilling at Howards, Heron South, Melbourne Bitter and Cobia.  Successfully completed a $30 million capital raising originally announced on 4 March 2026 ‒ Private Placement: Secured $20 million in previous quarter ‒ Entitlement Offer: 1 for 20 Non-renounceable Entitlement Offer to existing shareholders to raise up to a maximum of $10.2 million (before costs). ‒ Use of Funds: Proceeds will advance the Company’s Feasibility Study, fund an 80,000m exploration drilling program and provide general working capital. 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 ounces2 . 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. During the quarter the Company completed a Definitive Feasibility Study (DFS) based on free-milling open pit mining delivering a robust Production Target containing 962koz of mined gold (880koz recovered), underpinned by a maiden Ore Reserve Estimate of 18.2 Mt at 1.24 g/t Au for 728koz contained gold. The Company continued deep diamond drilling at the Kingfisher prospect, completed RC drilling at Swift, Eagle, Goldfinch and Shrike South, and received results from Kingfisher and Omega prospect diamond programs. Resource expansion RC drilling also continued at the Howards, Heron South, Melbourne Bitter and Cobia prospects. 2 Refer to Horizon Gold Limited ASX Announcement titled “Gum Creek Project Gold Resource Update” dated 4 November 2025. 3 Figure 1: Gum Creek Gold Project and surrounding gold projects and operating gold processing facilities. DFS Overview The DFS, which was undertaken by an integrated Horizon and MineScope Services project delivery team, provides a comprehensive estimate of 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. It has assessed the technical, financial and environmental viability of the Project, which delivers a Production Target of 25.1Mt at 1.19 g/t Au for 962koz3 which is 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 2012 edition of Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (JORC Code 2012). 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. The DFS confirms that mining and processing at Gum Creek is technically, economically, and environmentally viable at an average rate of 2.4Mtpa with supporting infrastructure. A summary of key Project results and financial metrics is shown in Table 1. 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. 4 Table 1: Key Project Results and Financial Metrics Next Steps Based on the compelling DFS outcomes, the Horizon Board has endorsed the DFS and intends to proceed with various Project activities including:  Upgrade the existing camp to its previous capacity (>100 persons)  Completion of the Project approvals pathway aimed at allowing FID in Q2 2027  Progress detailed engineering and design  Early contractor involvement (ECI) with Engineering, Procurement, and Construction (EPC) contractors;  Accelerate owner’s team appointments;  Advance major supply tenders; and  Progress activities to support the Project execution schedule. Working closely with its financial advisor, the Company will seek to arrange appropriate project finance for the Project. The production target profile and attractive financial outcomes of the DFS are expected to support project financing interest and capacity. The Company will consider a Final Investment Decision (FID) in parallel with Project financing and regulatory approvals. Plant construction activities are expected to commence at Gum Creek in Q4 2027 subject to receipt of required environmental approvals and the completion of Project implementation activities, which will significantly de-risk construction. Based on an estimated 12-month construction period, first gold at Gum Creek is expected in H2 2028. Key Financial Indicator Unit A$5,500/oz (Base Case) Life of Mine (LOM) Years 10.0 Ore Mined (LOM) Mt 25.1 Strip Ratio (LOM) x 9.6 Gold Produced (LOM) koz 880.1 Mill Throughput (Average) Mt / year 2.4 Average Feed Grade (LOM) g/t 1.19 Plant Recovery (LOM) % 91.5 Gold Produced (Average) koz / year 88.0 Gold Sales Revenue (LOM) A$m 4,841 EBITDA (LOM) A$m 2,268 Free Cash Flow - Pre-tax (LOM) A$m 1,854 NPV5 (Pre-tax) A$m 1,307 IRR (Pre-tax) % 53.1 Payback (Pre-tax) Months 23 NPV5 (Post-tax) A$m 894 IRR (Post-tax) % 41.7 Pre-production Capital A$m 350 All-in Sustaining Cost (LOM) A$/oz 2,995 5 Mineral Resources, Maiden Ore Reserve and Life of Mine Production Target A summary of the Mineral Resources4 , Maiden Ore Reserve and Life of Mine Production Target used as the basis for the DFS is outlined in Table 2. Table 2: Mineral Resources, Maiden Ore Reserve and Production Target Explanatory Notes: 1. Mineral Resources reported are inclusive of Open Pit Ore Reserves 2. The Mineral Resources and Ore Reserve estimate underpinning the Production Target in this announcement have been prepared by competent persons in accordance with the requirements of the JORC Code (2012); 3. Tonnes are reported as million tonnes (Mt) and rounded to the nearest 100,000; grade reported in grams per tonne (g/t) rounded to the nearest tenth; gold (Au) ounces are reported as thousands rounded to the nearest 1,000; 4. The total LOM Production Target is underpinned by 18% Indicated Resource ounces, 6% Inferred Resource ounces, and the remaining 76% is underpinned by Probable Ore Reserves; 5. Mineral Resources are reported at a 0.4 g/t Au to 0.8 g/t Au lower cut-off for Open Pit and 1.5 g/t Au for Underground and are inclusive of Ore Reserves; 6. Ore Reserves are reported using a A$4,500 gold price basis for cut-off grade calculations; and 7. Refer to Definitive Feasibility Study – Executive Summary, Appendix 2 – JORC Table 1 Section 3 & 4 for individual deposit cutoffs5 . Ore Reserve Estimate The maiden Open Pit Ore Reserve Estimate for the Gum Creek Gold Project as at 22 July 2026 is 18.2 Mt at 1.24 g/t Au for 728,400 oz of contained gold, all classified as Probable, across the seven open pit “Priority” deposits set out below. The Ore Reserve was estimated by Auralia Mining Consulting Pty Ltd and is reported in accordance with the JORC Code 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. Classification Cut-off (g/t)1 Tonnes (Mt) Grade (g/t) Au Metal (koz) Mineral Resources Indicated Various 26.7 1.90 1,629 Inferred Various 11.3 1.86 672 Total Various 38.0 1.89 2,301 Open Pit Ore Reserves Probable Various 18.2 1.24 728 Total Various 18.2 1.24 728 Open Pit Production Target Indicated Various 23.2 1.21 905 Inferred Various 1.9 0.94 57 Total Various 25.1 1.19 962 6 (2012). The November 2025 Mineral Resource Estimate of 37.97 Mt at 1.89 g/t Au for 2.30 Moz6 is reported inclusive of the Ore Reserve. A summary of the Maiden Open Pit Ore Reserve is presented in Table 3. Table 3: Maiden Open Pit Ore Reserve Note: Figures have been rounded. 6 Refer to Horizon Gold Ltd ASX announcement titled “Gum Creek Project Gold Resource Update” dated 4 November 2025 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 7 Figure 2: Feasibility Study mineral resources (labelled blue for Priority deposits & grey for other deposits) & exploration targets over geology. 8 Exploration Results Omega Prospect The Company completed four diamond holes at the Omega Prospect for a total of 1,725.2m. The program aimed to test for extensions to high-grade mineralisation beneath impressive previous drill intercepts including 30m @ 21.1g/t Au from 57m and 13m @ 10.8g/t Au from 122m7 . Assays received from the four holes have extended the high-grade gold mineralisation down plunge beneath the existing workings by over 120m and provided critical information about the controls on gold mineralisation at the prospect. Numerous significant intercepts were returned8 (Figure 3) including:  17m @ 1.40g/t Au from 315m including 5m @ 3.81g/t Au from 325m (OMDD001)  14m @ 2.87g/t Au from 337m including 8m @ 4.60g/t Au from 342m (OMDD001)  16m @ 1.30g/t Au from 336m including 2m @ 2.28g/t Au from 349m (OMDD002A)  1m @ 5.46g/t Au from 359m (OMDD002A)  20m @ 0.93g/t Au from 325m including 1m @ 5.35g/t Au from 334m (OMDD003)  10m @ 1.70g/t Au from 360m including 5m @ 2.69g/t Au from 363m (OMDD003)  8m @ 1.60g/t Au from 373m including 4m @ 2.49g/t Au from 376m (OMDD003)  11m @ 1.57g/t Au from 371m including 5m @ 3.07g/t Au from 374m (OMDD004) Gold mineralisation at Omega is hosted by Banded Iron Formation (BIF) with high-grade lodes formed at the intersection of north-south trending quartz filled sinistral faults and breccia zones within a steep south plunging BIF fold closure. A detailed structural analysis of the diamond core is underway prior to planning further deep infill and extensional diamond drilling. Figure 3: Omega Prospect long section showing historic open pits, underground infrastructure, interpreted high-grade ore shoots and gold intercept gram x metre pierce points with recent drilling intercepts >5 GxM, and historic unmined drilling intercepts >30 GxM (labelled). 7 Refer to Horizon Gold Limited ASX announcement titled “Gum Creek Geological Review” dated 15 February 2021 8 Refer to Horizon Gold Limited ASX Announcement titled “High-grade intercepts returned from Omega and Kingfisher Diamond Drilling” dated 29 April 2026 9 Kingfisher Prospect Assay results from the final three holes of the initial seven-hole diamond program aimed at testing high priority targets down plunge of previous high grade drill intercepts 9 included:  5m @ 2.42g/t Au from 338m including 3m @ 3.56g/t from 338m (KFDD006)  4m @ 2.37g/t Au from 407m including 1m @ 8.09g/t Au from 408m (KFDD006) The recent seven hole diamond program has confirmed the geological model by identifying additional high-grade intercepts including 4m @ 11.4g/t Au from 431m10 within the lower part of the central gold shoot; by defining the southern / lower margin of the central shoot; and by discovering a third shoot approximately 200m down plunge to the north in hole KFDD007 (including 4m @ 2.6g/t Au from 438m) (Figure 4). Deep diamond drilling is testing the extent of the newly discovered mineralised shoot to the north with two double-shift diamond rigs on site. Diamond drilling is also focussing on increasing resource confidence (inferred to indicated) within the upper and central high- grade shoots. Figure 4: Kingfisher Prospect long section showing interpreted high-grade gold shoots, intercept pierce points, recent drilling intercepts >7 GxM, and historic unmined drilling intercepts >30 GxM. 9 Refer to Horizon Gold Limited ASX Announcement titled “High-grade intercepts returned from Omega and Kingfisher Diamond Drilling” dated 29 April 2026 10 Refer to Horizon Gold Limited ASX announcements titled “High-grade intercepts returned from Kingfisher Diamond Drilling” dated 23 February 2026. 10 Swift Prospect The Company completed twelve RC holes at Swift for a total of 1,974m including three 120m deep pre-collars for diamond drilling (tails). The program aimed to test for down dip and up-dip extensions to high-grade mineralisation outside of the current Swift resource block model. The Swift Prospect RC drilling returned several significant intercepts11 (Figure 5):  6m @ 5.13g/t Au from 95m including 2m @ 14.7g/t Au from 98m (SFRC002)  5m @ 4.28g/t Au from 146m including 2m @ 10.28g/t Au from 146m (SFRC013)  3m @ 6.13g/t Au from 123m including 1m @ 17.6g/t Au from 123m (SFRC012)  9m @ 1.10g/t Au from 152m (SFRC012)  8m @ 1.09g/t Au from 145m (SFRC011) Figure 5: Swift and Vigilant drill hole plan showing $2900/oz optimised pit shell outline (white dashes), recent drill holes and recent gold intercepts >8 GxM over satellite image. The 6m @ 5.13g/t Au from 95m intercept returned from SFRC002 is located 40m down dip of previous drilling and requires up-dip infill, and down dip and along strike extension drilling. 11 Refer to Horizon Gold Limited ASX Announcement titled “Consistent High-Grade Intercepts returned from Swift, Eagle Goldfinch and Shrike South RC Drilling” dated 9 June 2026 11 Diamond core extensions to three RC pre-collars (SWRC005-007D) aim to extend to the main Swift lode down dip to the east and provide important structural information about potential controls on the high-grade plunging gold shoots. These holes will be completed in the coming months prior to an MRE upgrade for Swift later in 2026. Eagle Prospect The Company completed 33 RC holes for 2,590m aimed at testing for shallow open pittable mineralisation along strike of the existing resource (Figure 6). Significant intercepts12 include:  3m @ 6.62g/t Au from 43m including 1m @ 16.35g/t Au from 43m (EARC057)  13m @ 1.50g/t Au from 34m including 6m @ 2.77g/t Au from 34m (EARC038)  8m @ 2.36g/t Au from 58m including 4m @ 4.47g/t Au from 58m (EARC053)  8m @ 1.13g/t Au from 50m including 2m @ 3.09g/t Au from 52m (EARC038)  5m @ 1.90g/t Au from 29m including 2m @ 4.04g/t Au from 29m (EARC057)  14m @ 0.81g/t Au from 55m including 8m @ 1.02g/t Au from 57m (EARC047)  15m @ 0.59g/t Au from 35m including 4m @ 1.15g/t Au from 38m (EARC042)  3m @ 2.85g/t Au from 42m (EARC061)  3m @ 2.47g/t Au from 34m (EARC035) The RC program has successfully extended the known gold mineralisation at Eagle for approximately 300m to the south of the current block model. Wireframing is underway in advance of completing an update to the Eagle MRE. 12 Refer to Horizon Gold Limited ASX Announcement titled “Consistent High-Grade Intercepts returned from Swift, Eagle Goldfinch and Shrike South RC Drilling” dated 9 June 2026 12 Figure 6: Eagle / Goldfinch drill hole plan showing recent gold intercepts >6 GxM over satellite image. Goldfinch Prospect The Goldfinch Prospect is located 2.0km southeast of the Gidgee Mill. There is currently no MRE for this prospect. Two RC holes including one re-entry / extension hole were completed for 170m, as follow up to the RC program completed late in 2025. Significant assay results were returned from both holes13 (Figure 6) including:  4m @ 6.19g/t Au from 75m to EOH (GFRC032)  3m @ 5.11g/t Au from 73m (GFRC030) Geological wireframing is currently underway ahead of planned deeper drilling and the estimation of a maiden MRE for the prospect. Shrike South Prospect The Shrike South Prospect is located 1.3km southeast of the Gidgee Mill. The Prospect has been mined historically by open cut methods over a total strike length of ~280m. There is currently no MRE for this prospect. 13 Refer to Horizon Gold Limited ASX Announcement titled “Consistent High-Grade Intercepts returned from Swift, Eagle Goldfinch and Shrike South RC Drilling” dated 9 June 2026 13 The Company completed twelve RC holes for 1,187m. The drilling aimed to test for shallow strike extensions to gold mineralisation beneath and along strike of the existing pit. Numerous significant intercepts were returned14 (Figure 7) including:  11m @ 1.18g/t Au from 72m including 5m @ 2.20g/t Au from 73m (SSRC011)  7m @ 1.43g/t Au from 82m including 3m @ 2.49g/t Au from 82m (SSRC008)  7m @ 1.33g/t Au from 65m (SSRC004)  7m @ 1.33g/t Au from 68m (SSRC003)  5m @ 1.57g/t Au from 30m (SSRC001)  2m @ 3.91g/t Au from 55m (SSRC002)  7m @ 1.01g/t Au from 72m including 1m @ 4.25g/t Au from 72m (SSRC008)  6m @ 1.00g/t Au from 46m including 1m @ 3.85g/t Au from 50m (SSRC009) Wireframing is underway in advance of completing a maiden MRE for the prospect. Figure 7: Shrike South & Thornbill West drill hole plan showing recent drill intercepts (>6 GxM) & gram x metre pierce points over satellite image. 14 Refer to Horizon Gold Limited ASX Announcement titled “Consistent High-Grade Intercepts returned from Swift, Eagle Goldfinch and Shrike South RC Drilling” dated 9 June 2026 14 The Thornbill West Prospect is located 1.6km southeast of the Gidgee Mill, where the Company completed an additional three RC holes for 270m. Drilling returned the following significant gold intercepts15 (Figure 7):  20m @ 0.65g/t Au from 7m including 3m @ 2.11g/t Au from 22m (THRC012)  10m @ 0.62g/t Au from 11m including 1m @ 3.08g/t Au from 18m (THRC010) Drilling has successfully extended gold mineralisation to the north of the prospect. Further drilling is planned to test for structural continuity and determine if this zone connects with the Shrike South prospect The Vigilant Prospect is located 1.3km east of the Gidgee Mill and forms part of the Swan/Swift open cut and underground MRE. An infill program consisting of three RC holes totalling 311m were drilled to tighten the drill spacing within the current resource. The program returned a best intercept of 2m @ 1.39g/t Au from 130m in hole VIRC01016 . Moving forward, exploration drilling will shift focus toward testing the shallow supergene mineralisation at the southern end of the Vigilant open pit. Corporate Capital Raising On the 4 March 2026 the Company announced a $30 million capital raising in the form of a private Placement of $20 million to institutional and high net worth investors (completed last quarter) and 1 for 20 Non-renounceable Entitlement Offer to existing shareholders to raise up to a maximum of $10 million (completed this quarter), both capital raising initiatives were undertaken at $1.20 per share. On 2 April 2026 the Company issued 7,246,810 shares in respect to Non-renounceable Entitlement Offer and on 8 April 2026 the Company issued 1,235,205 shares being the remaining shortfall shares in the Non- renounceable Entitlement Offer (raising a total of $10,178,418 (before costs) in the Non- renounceable Entitlement Offer). The funds from the capital raising have and will be directed towards completion of the Company’s Feasibility Study, an 80,000m exploration drilling program in CY2026 and general working capital. Additional ASX Listing Rule Disclosures As required by ASX Listing Rule 5.3, the Company advises it spent $4,634,000 on exploration and evaluation activities during the quarter. The expenditure is predominantly related to costs associated with resource drilling, resource estimation consultants, the Gum Creek Feasibility Study 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 $133,000, encompassing the Managing Director’s salary, Non-Executive Directors’ fees and associated superannuation. 15 Refer to Horizon Gold Limited ASX Announcement titled “Consistent High-Grade Intercepts returned from Swift, Eagle Goldfinch and Shrike South RC Drilling” dated 9 June 2026 16 Refer to Horizon Gold Limited ASX Announcement titled “Consistent High-Grade Intercepts returned from Swift, Eagle Goldfinch and Shrike South RC Drilling” dated 9 June 2026 15 As at 30 June 2026, Horizon had a cash at hand balance of $24,045,000. Mining Tenements The status of the Company’s mining tenements as at 30 June 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 ounces17 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) 18 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. 17 Refer to Horizon Gold Limited ASX Announcement titled “Gum Creek Project Gold Resource Update” dated 4 November 2025. 18 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. 16 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. 17 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 basi