Announcement PDF ASX:AIS 1 ASX RELEASE 21 JULY 2026 MAJOR INCREASE IN TRITTON MINERAL RESOURCES AND ORE RESERVES UNDERPINS LONG-LIFE COPPER HUB STRATEGY • Mineral Resources increase to 33Mt containing approximately 540kt copper metal, up 70% (from 310kt) driven by: o The integration of Mallee Bull and Wirlong deposits, together with successful exploration and resource definition drilling at Avoca Tank and Budgerygar • Over fourfold increase in Tritton Ore Reserves to 10Mt containing approximately180kt copper metal (up from 37kt) driven by: o Maiden Constellation underground Ore Reserve of 3.8Mt containing approximately 62kt copper metal o Maiden Mallee Bull Ore Reserve of 2.7Mt containing approximately 66kt copper metal Australian mid-tier copper and gold producer, Aeris Resources Limited (ASX:AIS) (Aeris or the Company) is pleased to announce an updated Mineral Resource Estimate (MRE) and Ore Reserve Estimate (ORE) as at 30 June 2026 for its 100% owned Tritton Operations in central NSW. Total Ore Reserves have increased to 10Mt at 1.7% Cu, 0.38g/t Au and 10g/t Ag for contained metal of 180kt Cu, 130koz Au and 3.2Moz Ag as shown in Table 1. Total Mineral Resources have increased to 33Mt at 1.7% Cu, 0.32g/t Au and 9g/t Ag for contained metal of 540kt Cu, 340koz Au and 9.6Moz Ag as shown in Table 2. The acquisition of Peel Mining Limited has added the Mallee Bull and Wirlong deposits to the Group's Mineral Resource inventory, contributing approximately 200kt of contained copper, including approximately 160kt classified as Indicated Mineral Resource. These high-quality additions strengthen the Company's development pipeline while materially increasing the overall Mineral Resource and Ore Reserve base. Equally significant is the continued organic growth delivered at Tritton Operations. During FY26, Aeris increased underground diamond drilling threefold, focusing on the Avoca Tank and Budgerygar deposits, where exploration and resource extension drilling delivered over a 2Mt ASX:AIS 2 increase to the Mineral Resource base. The success of these targeted drilling programs demonstrates the effectiveness of the Company's strategy of investing in underground exploration drilling to grow Mineral Resources across Tritton. The increase in Ore Reserves has been driven predominantly by the updated Constellation ORE1 and the Maiden Mallee Bull ORE. The successful extension of the Mineral Resource at Budgerygar has also led to an increased ORE at that deposit. Aeris’ Executive Chairman, André Labuschagne, commented “this Reserve update represents a significant milestone for the Tritton Operations. With more than 10 million tonnes now in Ore Reserve, equivalent to more than 5 years of mill feed at the current processing plant capacity, we have established a strong foundation for a long-life, multi-mine copper operation centred on our existing Tritton processing infrastructure.” “We have declared a Maiden Underground ORE at Constellation, complementing the existing open pit Ore Reserve and demonstrating a long-life mining operation. As targeted, we have also declared a Maiden ORE on the newly acquired Mallee Bull project, which is shaping up as an important ore source for Tritton in the future. Importantly, both Constellation and Mallee Bull show significant potential for further growth with additional drilling and technical work.” “Our considerable investment in exploration in FY26 has delivered material extensions to the Mineral Resource Estimates at Avoca Tank and Budgerygar. At Budgerygar, much of this growth has already been converted to Ore Reserve, resulting in a 317% increase in Ore Reserves after mining depletion compared with December 2024. At Avoca Tank, the mineralisation discovered at depth and along strike has increased the Mineral Resource of this high-grade deposit by 180%. We will continue underground development and drilling of this resource in FY27 with the focus to upgrade it into Ore Reserve status.” “These results demonstrate the strength of both the organic and inorganic elements of our growth strategy. The Peel acquisition has delivered a maiden 2.7 million tonne Ore Reserve at the Mallee Bull deposit, while our investment in exploration has generated material organic growth at Avoca Tank and Budgerygar. Together, these initiatives are expanding and diversifying Tritton's portfolio of ore sources around its established processing infrastructure. “The expanded Mineral Resource and Ore Reserve inventory at Tritton will underpin the development of an updated Life of Mine plan showing the long-term potential of the operation.” Next Steps These updated Mineral Resource and OREs will inform a revised life of mine plan and production target for Tritton Operations, to be released in the first half of FY27. At Constellation, resource definition drilling will focus on the remaining 0.5Mt of inferred resource within the open pit to bring it into indicated status prior to mining. Further metallurgical test work and plant trials will be undertaken on the oxide material to increase recoveries and potentially bring forward production. 1 The new open pit and underground Reserves are inclusive and replace the previously reported Maiden Open Pit Ore Reserve Estimate for Constellation Project, released 28 October 2025 ASX:AIS 3 At Mallee Bull, optimisation of the mine plan and production schedule will continue in FY27 with the aim of identifying opportunities to increase the maiden Ore Reserve. Feasibility studies, including assessment of ore transport options to the Tritton processing plant, will be progressed, together with project planning for commencement of the exploration decline and studies to support the EIS and permitting process. FY26 drilling results validate Aeris' geological model that the Tritton Operation copper deposits exhibit significant down-dip continuity and remain open down dip (refer to Figure 2). Nine of the ten known deposits within the Tritton tenement package remain open down dip. Several deposits have already demonstrated substantial vertical extent, including Tritton, which has been defined over more than two kilometres down dip, and both Constellation and Murrawombie, which have each been defined over more than one kilometre down dip. The success of drilling at Avoca Tank and Budgerygar reinforces the Company's view that sustained underground exploration and resource extension drilling can continue to extend known mineralisation and deliver meaningful Mineral Resource growth. This strategy will continue in FY27, with approximately 85,000 metres of underground drilling planned across the Tritton Operation. ASX:AIS 4 Figure 1: Location of Tritton Operations Resources ASX:AIS 5 Figure 2: Tritton Operation composite long section showing current extents of mineralisation defined across most deposits Tritton Ore Reserve Estimate The Tritton Ore Reserve Estimate (ORE) reflects the combined effects of mining depletion, the addition of the Mallee Bull Project following the acquisition of Peel Mining Limited, and ongoing organic growth through the conversion of additional Indicated Mineral Resources supported by infill and extensional drilling and detailed mine planning. Principal changes include the updated Constellation Open Pit ORE and a Maiden Underground ORE (Appendix 2), the Maiden Mallee Bull ORE (Appendix 3), the growth in the Budgerygar ORE resulting from the conversion of additional Indicated Mineral Resources (Appendix 1) and the inclusion of current ore stockpiles. ASX:AIS 6 Table 1: Tritton Operations ORE at 30 June 2026 Deposit Category Tonnes Grade Contained Metal (Mt) Cu Au Ag Cu Au Ag (%) (g/t) (g/t) (kt) (koz) (koz) Tritton Underground Proved - - - - - - - Probable 0.10 1.2 0.06 2 1.2 0.21 6.3 Total 0.10 1.2 0.06 2 1.2 0.21 6.3 Budgerygar Proved 0.45 1.4 0.10 3 6.1 1.4 50 Probable 0.47 1.4 0.12 5 6.8 1.7 72 Total 0.92 1.4 0.11 4 13 3.1 120 Murrawombie Open Pit (supergene / sulphide) Proved - - - - - - - Probable 0.82 1.3 0.26 4 10 6.7 110 Total 0.82 1.3 0.26 4 10 6.7 110 Avoca Tank Proved 0.061 1.7 0.50 7 1.0 1.0 13 Probable - - - - - - - Total 0.061 1.7 0.50 7 1.0 1.0 13 Constellation Open Pit (oxide) Proved - - - - - - - Probable 0.82 0.8 0.26 1 6.9 6.8 34 Total 0.82 0.8 0.26 1 6.9 6.8 34 Constellation Open Pit (supergene / sulphide) Proved - - - - - - - Probable 0.64 1.7 0.95 3 11 19 64 Total 0.64 1.7 0.95 3 11 19 64 Constellation Underground Proved - - - - - - - Probable 3.8 1.6 0.60 3 62 73 360 Total 3.8 1.6 0.60 3 62 73 360 Mallee Bull Underground Proved - - - - - - - Probable 2.7 2.4 0.18 29 66 15 2,500 Total 2.7 2.4 0.18 29 66 15 2,500 ROM Stockpiles Proved 0.24 0.9 - - 2.1 - - Probable 0.041 1.1 - - 0.43 - - Total 0.28 0.9 - - 2.5 - - Total Proved 0.75 1.2 0.10 3 9.2 2.4 63 Probable 9.4 1.8 0.41 11 170 120 3,200 Grand Total 10 1.7 0.38 10 180 130 3,200 Notes: • Mineral Resource tonnes and contained metal are reported to two significant figures; grades are reported to two decimal places (Au), one decimal place (Cu), and to the nearest whole number (Ag). Figures are rounded, and rounded figures may not sum precisely to reported totals or reconcile exactly between tonnes, grade and contained metal. • All Tritton Operation underground OREs use a net smelter return (NSR) cut-off ranging from $80-142/t (incremental stope ore) and $145-240/t (fully costed stope ore). • Murrawombie open pit ORE is reported at a copper cutoff grade of 0.5% • Constellation open pit oxide, supergene and sulphide OREs use an NSR cut-off. • Au and Ag grades not estimated for stockpiles. • Tritton Operation Mineral Resource figures are inclusive of Ore Reserves. ASX:AIS 7 Figure 3: Constellation Maiden Underground ORE mine design ASX:AIS 8 Figure 4: Mallee Bull Maiden ORE mine design Consistent with Aeris' hub-and-spoke strategy for Tritton Operations, the Company continues to prioritise the conversion of Mineral Resources to Ore Reserves to support long-term mine planning and operational flexibility. Future Ore Reserve growth will depend on exploration success, ongoing resource conversion drilling, technical studies, permitting and prevailing economic conditions. Changes to Previous Estimate As at 30 June 2026, the Tritton Operations Ore Reserve comprises 10 Mt, representing a fourfold increase compared with the 31 December 2024 Ore Reserve Statement. Contained metal increased to approximately 180 kt of copper, 130 koz of gold and 3,200 koz of silver. ASX:AIS 9 The changes to the Ore Reserve ore tonnes and contained copper metal are summarised in Figure 5 and Figure 6. The principal changes from the previous ORE are: • Mining depletion: Reduction of 1.5 Mt of ore and 28 kt of contained copper resulting from production at the Tritton, Budgerygar and Avoca Tank underground mines, and the Murrawombie Open Pit. • Constellation Project: Addition of 1.5 Mt of ore containing 18 kt of copper from the updated Open Pit Ore Reserve, together with the Maiden Underground ORE of 3.8 Mt containing 62 kt of copper. • Mallee Bull Project: Addition of the Maiden ORE comprising 2.7 Mt of ore containing 66 kt of copper following the acquisition of Peel Mining Limited. • Budgerygar: Net growth of 0.5 Mt of ore containing 7 kt of copper following the conversion of additional Indicated Mineral Resources, after allowing for mining depletion. • Ore stockpiles: Increase of 0.2 Mt of ore containing 2 kt of copper, predominantly from the Murrawombie Open Pit. The updated Ore Reserve reflects Aeris' continued success in replacing mining depletion through the conversion of Mineral Resources to Ore Reserves, together with the addition of new Ore Reserves from the Constellation and Mallee Bull Projects, supporting the long-term growth strategy for Tritton Operations. Figure 5: Change to the Tritton Operations Ore Reserve tonnage relative to 31 December 2024 2.4 10 -0.1 -0.4 -0.4 +0.5 +1.5 +3.8 +2.7 +0.2 - 2 4 6 8 10 12 Tonnes (Mt) ASX:AIS 10 Figure 6: Change to the Tritton Operations Ore Reserve contained copper metal relative to 31 December 2024 Tritton Mineral Resource Estimate The Tritton Mineral Resource Estimate reflects the inclusion of the Mallee Bull and Wirlong deposits following the acquisition of Peel Mining Limited, together with continued organic Mineral Resource growth across the operation through successful underground exploration and resource definition drilling. As at 30 June 2026, the Tritton Operations Mineral Resource totals 33 Mt at 1.7% Cu, 0.32 g/t Au and 9 g/t Ag, containing 540 kt of copper, 340 koz of gold and 9,600 koz of silver. 37 180 -2 -11 -4 +7 +18 +62 +66 +2 - 20 40 60 80 100 120 140 160 180 200 Contained Copper (kt) ASX:AIS 11 Table 2: Tritton Operations MRE at 30 June 2026 Deposit Category Tonnes Grade Contained Metal (Mt) Cu Au Ag Cu Au Ag (%) (g/t) (g/t) (kt) (koz) (koz) Tritton Underground Measured 0.29 0.9 0.10 2 2.7 0.98 23 Indicated 0.24 1.0 0.10 3 2.5 0.77 21 Inferred 0.75 1.1 0.04 2 8.4 0.99 41 Total 1.3 1.1 0.07 2 14 2.7 85 Tritton Remnants Measured - - - - - - - Indicated 0.11 2.5 0.21 9 2.8 0.77 31 Inferred - - - - - - - Total 0.11 2.5 0.21 9 2.8 0.77 31 Tritton Underground Total 1.4 1.2 0.08 3 16 3.5 120 South Wing Measured - - - - - - - Indicated - - - - - - - Inferred 0.85 1.4 0.28 8 12 7.6 230 Total 0.85 1.4 0.28 8 12 7.6 230 Budgerygar Measured 1.0 1.4 0.15 4 15 5.0 150 Indicated 1.0 1.5 0.13 5 15 4.2 170 Inferred 1.2 1.2 0.06 2 15 2.4 78 Total 3.2 1.4 0.11 4 45 12 390 Murrawombie Open Pit (oxide) Measured - - - - - - - Indicated - - - - - - - Inferred - - - - - - - Total - - - - - - - Murrawombie Open Pit (supergene / sulphide) Measured - - - - - - - Indicated 0.63 1.1 0.21 3 7.2 4.4 71 Inferred 0.26 0.3 0.06 1 0.87 0.54 13 Total 0.90 0.9 0.17 3 8.1 4.9 83 Murrawombie Underground Measured - - - - - - - Indicated 0.94 1.2 0.26 4 11 7.9 120 Inferred 0.096 1.4 0.33 5 1.3 1.0 16 Total 1.0 1.2 0.27 4 13 8.9 130 Murrawombie Total 1.9 1.1 0.22 3 21 14 210 Avoca Tank Measured 0.19 2.8 0.88 14 5.4 5.4 89 Indicated - - - - - - - Inferred 1.2 2.2 0.49 8 28 19 320 Total 1.4 2.3 0.54 9 33 25 410 Constellation Open Pit (oxide) Measured - - - - - - - Indicated 2.0 0.5 0.2 1 10 13 59 Inferred - - - - - - - Total 2.0 0.5 0.2 1 10 13 59 Constellation Open Pit (supergene / sulphide) Measured - - - - - - - Indicated 0.59 1.9 1.03 3 11 20 59 Inferred 0.48 3.4 0.39 2 16 6.0 37 Total 1.1 2.6 0.75 3 27 26 96 Constellation Underground Measured - - - - - - - Indicated 3.2 2.3 0.82 3 73 84 350 Inferred 2.1 2.2 0.67 2 47 45 120 Total 5.3 2.3 0.76 3 120 130 470 Constellation Total 8.4 1.9 0.62 2 160 170 630 Budgery Open Pit (oxide) Measured - - - - - - - Indicated 0.011 1.4 0.06 - 0.16 0.021 - Inferred - - - - - - - Total 0.011 1.4 0.06 - 0.16 0.021 - Budgery Open Pit (supergene / sulphide) Measured - - - - - - - Indicated 1.0 1.3 0.15 - 13 5.0 - Inferred 0.069 1.3 0.24 - 0.88 0.53 - ASX:AIS 12 Deposit Category Tonnes Grade Contained Metal (Mt) Cu Au Ag Cu Au Ag (%) (g/t) (g/t) (kt) (koz) (koz) Total 1.1 1.3 0.16 - 14 5.5 - Budgery Underground Measured - - - - - - - Indicated 0.46 0.9 0.12 - 4.3 1.8 - Inferred 0.13 0.9 0.01 - 1.2 0.043 - Total 0.59 0.9 0.10 - 5.5 1.8 - Budgery Total 1.7 1.2 0.14 - 20 7.4 - Kurrajong Measured - - - - - - - Indicated - - - - - - - Inferred 2.0 1.7 0.18 5 35 12 330 Total 2.0 1.7 0.18 5 35 12 330 Mallee Bull Measured - - - - - - - Indicated 6.3 1.8 0.41 30 110 82 6,000 Inferred 0.76 1.9 0.11 21 14 2.7 510 Total 7.0 1.8 0.38 29 130 84 6,500 Wirlong Measured - - - - - - - Indicated 2.3 1.9 0.03 6 44 1.5 440 Inferred 2.0 1.5 0.02 5 30 1.9 320 Total 4.3 1.7 0.02 6 74 3.4 770 ROM Stockpiles Measured 0.28 0.9 - - 2.5 - - Indicated - - - - - - - Inferred - - - - - - - Total 0.28 0.9 - - 2.5 - - Total Measured 1.8 1.4 0.20 4 25 11 260 Indicated 19 1.6 0.37 12 310 230 7,300 Inferred 12 1.8 0.26 5 210 100 2,000 Grand Total 33 1.7 0.32 9 540 340 9,600 Notes: • Mineral Resource tonnes and contained metal are reported to two significant figures; grades are reported to two decimal places (Au), one decimal place (Cu), and to the nearest whole number (Ag). Figures are rounded, and rounded figures may not sum precisely to reported totals or reconcile exactly between tonnes, grade and contained metal. • Tritton Operation open pittable Mineral Resource figures are reported from within optimised pit shells. The Constellation open pittable material is reported using a net smelter return (NSR) between $18/t and $59/t, depending on the processing stream and mining costs. The Murrawombie open pittable material is reported at a 0.2% Cu cut-off. • Underground Mineral Resource figures are reported within conceptual stope shapes generated using a NSR between $100/t and $125/t. All classified material within the conceptual stope shapes is reported as Mineral Resource. • The Mallee Bull and Wirlong Mineral Resource figures are reported above a $80/t NSR cut-off within conceptual stope shapes, which include minimum mining widths and internal dilution to bound the MREs. • The Budgery deposit Mineral Resource is JORC 2004 compliant. The open pittable material is reported at a NSR of $40/t. The underground Mineral Resource is reported within conceptual stope shapes at a $110/t NSR. All classified material within the conceptual stope shapes is reported as Mineral Resource. • Tritton Operations reported Mineral Resource figures are inclusive of Ore Reserves. • A detailed description for each MRE is included in the Appendices (except for the Budgery resource model, which is JORC 2004 compliant). ASX:AIS 13 Figure 7: Avoca Tank Mineral Resource comparison (Dec 2024 and June 2026) showing Mineral Resource growth from the FY26 exploration drill program. ASX:AIS 14 Figure 8: Budgerygar Mineral Resource comparison (Dec 2024 and June 2026) showing Mineral Resource growth from the FY26 exploration drill program. ASX:AIS 15 Changes to Previous Estimate The 30 June 2026 MRE represents an approximate 70% increase in tonnage, 70% copper metal increase, 50% gold metal increase and 350% silver metal increase compared to the 31 December 2024 MRE. Figure 9 and Figure 10 summarise the net changes in the MRE by deposit between reporting periods. The reported changes incorporate all factors affecting the Mineral Resource, including additions from drilling, revisions to geological interpretation and estimation, updated reporting parameters, and mining depletion. The main contributors to the changes are: • The acquisition of the Mallee Bull and Wirlong deposits, which collectively added 11Mt and 200kt Cu metal • Mineral Resource growth at Avoca Tank (+0.9Mt and +14kt Cu metal) and Budgerygar (+1.3Mt and +18kt Cu metal), reflecting successful underground exploration and resource definition drill programs completed during FY26 • A net decrease at Murrawombie (-1.2Mt and -12kt Cu metal) from open pit mine depletion • An incremental net increase from the Tritton Other grouping incorporating changes to the Tritton, South Wing, Budgery and Kurrajong MREs. Figure 9: Changes to the Tritton Operation MRE tonnage by deposit relative to 31 December 2024 19 33 -1.2 +1.3 +0.9 +0.7 +0.6 +7.0 +4.3 - 5 10 15 20 25 30 35 Tonnes (Mt) ASX:AIS 16 Figure 10: Changes to the Tritton Operation MRE contained copper metal by deposit relative to 31 December 2024 This announcement authorised for lodgement by: Andre Labuschagne Executive Chairman ENDS Investor enquiries: Stefan Edelman, General Manager Corporate Development investorrelations@aerisresources.com.au Follow Aeris Resources: Subscribe to email announcements and join our Investor Hub to stay up to date and connect to Aeris leaders. About Aeris Aeris Resources Limited (ASX:AIS) is an Australian mid-tier copper and gold producer. Aeris owns and operates two producing assets, Tritton Copper Operations (NSW) and Cracow Gold Operations (Qld), along with a strong pipeline of growth projects and a highly prospective exploration portfolio. Its experienced board and management have significant corporate and technical expertise to drive an efficient operating model. Aeris continues to investigate strategic mergers and acquisitions to build value for its stakeholders. Find out more at www.aerisresources.com.au and follow Aeris on LinkedIn. 310 540 -12 +18 +14 +4 +2 +130 +75 - 100 200 300 400 500 600 Contained Copper (kt) ASX:AIS 17 Competent Persons Statements The information in this announcement that relates to the Tritton Ore Reserve Estimates has been compiled by Cam Schubert, Chief Technical Officer of Aeris Resources Limited and a Fellow of the Australasian Institute of Mining and Metallurgy (FAusIMM No. 111663). Mr Schubert has sufficient experience relevant to the style of mineralisation, the type of deposit under consideration and the activities undertaken to qualify as a Competent Person as defined in the JORC Code (2012 Edition), and consents to the inclusion in this announcement of the matters based on their information in the form and context in which they appear. The information in this announcement that relates to the Tritton Mineral Resource Estimates has been compiled by Brad Cox, Executive General Manager Exploration of Aeris Resources Limited and a Member of the Australasian Institute of Mining and Metallurgy (MAusIMM No. 220544). Mr Cox has sufficient experience relevant to the style of mineralisation, the type of deposit under consideration and the activities undertaken to qualify as a Competent Person as defined in the JORC Code (2012 Edition), and consents to the inclusion in this announcement of the matters based on their information in the form and context in which they appear. Table 3 Identifies the Competent Persons responsible for each of the Mineral Resources and Ore Reserves reported in this announcement. The information in this announcement that relates to the Mineral Resource and Ore Reserves listed in and Table 2 are based on, and fairly represents, information and supporting documentation prepared by the Competent Person identified in the corresponding table entry. Each Competent Person is a full-time employee of Aeris Resources Limited, with the exception of Jonathon Abbott, and a director of Matrix Resource Consultants Pty Ltd, and Rob Tyson, a full-time employee of Peel Mining Limited. Each Competent Person is a Member or Fellow of either the Australasian Institute of Mining and Metallurgy (AusIMM) or the Australian Institute of Geoscientists, has sufficient experience relevant to the style of mineralisation, the type of deposit under consideration and the activities undertaken, and qualifies as a Competent Person as defined in the JORC Code (2012 Edition). Each Competent Person consents to the inclusion in this announcement of the matters based on their information in the form and context in which they appear. Employees of Aeris Resources Limited acting as Competent Persons may hold securities in the Company and may be eligible to participate in the Company's long-term incentive (LTI) arrangements, details of which are disclosed in the Company's Annual Report. Replacement of depleted Mineral Resources and Ore Reserves is one of several performance measures that may be considered in assessing performance under the Company's long-term incentive arrangements. ASX:AIS 18 Table 3: Competent Persons responsible for the Tritton Mineral Resource and Ore Reserve estimates reported in this announcement Deposit Mineral Resource Estimate (MRE) and Deposit Ore Reserve Estimate (ORE) Competent Person Membership Status Member Number Tritton MRE: Constellation, Kurrajong and Budgery Brad Cox AusIMM Member 220544 Tritton MRE: Tritton, Budgerygar, Avoca Tank, Murrawombie, South Wing Osvaldo Gonzalez AusIMM Member 3175947 Tritton ORE: Constellation Open Pit Tyler Benson AusIMM Member 307475 Tritton ORE: Constellation Underground Max McInnis AusIMM Member 303564 Tritton ORE: Tritton, Budgerygar, Avoca Tank Tim Brettell AusIMM Member 200052 Tritton ORE: Murrawombie Open Pit Tyler Benson AusIMM Member 307475 Tritton MRE: Mallee Bull (estimation) Tritton MRE: Mallee Bull (interpretation / informing information) Jonathon Abbott2 Rob Tyson2 AIG AusIMM Member Member 4835 203414 Tritton MRE: Wirlong (estimation) Tritton MRE: Wirlong (interpretation / informing information) Jonathon Abbott2 Rob Tyson2 AIG AusIMM Member Member 4835 203414 Tritton ORE: Mallee Bull Tim Brettell AusIMM Member 200052 The Mineral Resource estimates for the Mallee Bull and Wirlong deposits were first reported by Peel Mining Limited in its ASX announcement titled "20Mt Resource Base for South Cobar Project" dated 9 January 2023. Aeris acquired these deposits through its acquisition of Peel Mining Limited, completed on 1 July 2026, and the estimates are reported by Aeris in this announcement without re-estimation. Aeris confirms that it is not aware of any new information or data that materially affects the Mineral Resource estimates for the Mallee Bull and Wirlong deposits, and that all material assumptions and technical parameters underpinning the estimates continue to apply and have not materially changed. The Competent Persons responsible for the estimates, Mr Jonathon Abbott (estimation) and Mr Rob Tyson (geological interpretation and informing information), have reviewed the estimates and confirm they continue to comply with the JORC Code (2012 Edition). Aeris confirms that the form and context in which the Competent Persons' findings are presented have not been materially modified from the original announcement. 2 Mr Abbott is the Competent Person for the estimation of the Mallee Bull and Wirlong Mineral Resource Estimates. Mr Tyson is Competent Person for the geological interpretation and information informing the Mallee Bull and Wirlong Mineral Resource Estimates. ASX:AIS 19 Appendix 1 – Tritton Operations Mineral Resource and Ore Reserve Estimates Mineral Resource Estimate Table 4: Tritton Operations MRE as at 30 June 2026 Deposit Category Tonnes Grade Contained Metal (Mt) Cu Au Ag Cu Au Ag (%) (g/t) (g/t) (kt) (koz) (koz) Tritton Underground Measured 0.29 0.9 0.10 2 2.7 0.98 23 Indicated 0.24 1.0 0.10 3 2.5 0.77 21 Inferred 0.75 1.1 0.04 2 8.4 0.99 41 Total 1.3 1.1 0.07 2 14 2.7 85 Tritton Remnants Measured - - - - - - - Indicated 0.11 2.5 0.21 9 2.8 0.77 31 Inferred - - - - - - - Total 0.11 2.5 0.21 9 2.8 0.77 31 Tritton Underground Total 1.4 1.2 0.08 3 16 3.5 120 South Wing Measured - - - - - - - Indicated - - - - - - - Inferred 0.85 1.4 0.28 8 12 7.6 230 Total 0.85 1.4 0.28 8 12 7.6 230 Budgerygar Measured 1.0 1.4 0.15 4 15 5.0 150 Indicated 1.0 1.5 0.13 5 15 4.2 170 Inferred 1.2 1.2 0.06 2 15 2.4 78 Total 3.2 1.4 0.11 4 45 12 390 Murrawombie Open Pit (oxide) Measured - - - - - - - Indicated - - - - - - - Inferred - - - - - - - Total - - - - - - - Murrawombie Open Pit (supergene / sulphide) Measured - - - - - - - Indicated 0.63 1.1 0.21 3 7.2 4.4 71 Inferred 0.26 0.3 0.06 1 0.87 0.54 13 Total 0.90 0.9 0.17 3 8.1 4.9 83 Murrawombie Underground Measured - - - - - - - Indicated 0.94 1.2 0.26 4 11 7.9 120 Inferred 0.096 1.4 0.33 5 1.3 1.0 16 Total 1.0 1.2 0.27 4 13 8.9 130 Murrawombie Total 1.9 1.1 0.22 3 21 14 210 Avoca Tank Measured 0.19 2.8 0.88 14 5.4 5.4 89 Indicated - - - - - - - Inferred 1.2 2.2 0.49 8 28 19 320 Total 1.4 2.3 0.54 9 33 25 410 Constellation Open Pit (oxide) Measured - - - - - - - Indicated 2.0 0.5 0.2 1 10 13 59 Inferred - - - - - - - Total 2.0 0.5 0.2 1 10 13 59 Constellation Open Pit (supergene / sulphide) Measured - - - - - - - Indicated 0.59 1.9 1.03 3 11 20 59 Inferred 0.48 3.4 0.39 2 16 6.0 37 Total 1.1 2.6 0.75 3 27 26 96 Constellation Underground Measured - - - - - - - Indicated 3.2 2.3 0.82 3 73 84 350 Inferred 2.1 2.2 0.67 2 47 45 120 ASX:AIS 20 Deposit Category Tonnes Grade Contained Metal (Mt) Cu Au Ag Cu Au Ag (%) (g/t) (g/t) (kt) (koz) (koz) Total 5.3 2.3 0.76 3 120 130 470 Constellation Total 8.4 1.9 0.62 2 160 170 630 Budgery Open Pit (oxide) Measured - - - - - - - Indicated 0.011 1.4 0.06 - 0.16 0.021 - Inferred - - - - - - - Total 0.011 1.4 0.06 - 0.16 0.021 - Budgery Open Pit (supergene / sulphide) Measured - - - - - - - Indicated 1.0 1.3 0.15 - 13 5.0 - Inferred 0.069 1.3 0.24 - 0.88 0.53 - Total 1.1 1.3 0.16 - 14 5.5 - Budgery Underground Measured - - - - - - - Indicated 0.46 0.9 0.12 - 4.3 1.8 - Inferred 0.13 0.9 0.01 - 1.2 0.043 - Total 0.59 0.9 0.10 - 5.5 1.8 - Budgery Total 1.7 1.2 0.14 - 20 7.4 - Kurrajong Measured - - - - - - - Indicated - - - - - - - Inferred 2.0 1.7 0.18 5 35 12 330 Total 2.0 1.7 0.18 5 35 12 330 Mallee Bull Measured - - - - - - - Indicated 6.3 1.8 0.41 30 110 82 6,000 Inferred 0.76 1.9 0.11 21 14 2.7 510 Total 7.0 1.8 0.38 29 120 85 6,500 Wirlong Measured - - - - - - - Indicated 2.3 1.9 0.03 6 44 1.5 440 Inferred 2.0 1.5 0.02 5 31 1.9 320 Total 4.3 1.7 0.02 6 75 3.4 770 ROM Stockpiles Measured 0.28 0.9 - - 2.5 - - Indicated - - - - - - - Inferred - - - - - - - Total 0.28 0.9 - - 2.5 - - Total Measured 1.8 1.4 0.20 4 25 11 260 Indicated 19 1.6 0.37 12 310 230 7,300 Inferred 12 1.8 0.26 5 210 100 2,000 Grand Total 33 1.7 0.32 9 540 340 9,600 Notes: • Mineral Resource tonnes and contained metal are reported to two significant figures; grades are reported to two decimal places (Au), one decimal place (Cu), and to the nearest whole number (Ag). Figures are rounded, and rounded figures may not sum precisely to reported totals or reconcile exactly between tonnes, grade and contained metal. • Tritton Operations open pittable Mineral Resource figures are reported from within optimised pit shells. The Constellation open pittable material is reported using a net smelter return (NSR) between $18/t and $59/t, depending on the processing stream and mining costs. The Murrawombie open pittable material is reported at a 0.2% Cu cut-off. • Underground Mineral Resource figures are reported within conceptual stope shapes generated using a NSR between $100/t and $125/t. All classified material within the conceptual stope shapes is reported as Mineral Resource. • The Mallee Bull and Wi