Announcement PDF Page 1 of 7 | ABN 43 650 398 897 12/217 Howick St, Bathurst, 2795 www.legacyminerals.com.au New Mt Carrington Mineral Resource Estimate Update Underway Targeting an increase in silver ounces, copper tonnes and resource confidence Mineral Resource Estimate Update Commenced • Leading global advisory firm WSP Global Inc. appointed to update the Mt Carrington Mineral Resource Estimate (MRE) incorporating important new density data sets, drilling results and updated assumptions based on the outcomes of the Ausenco Mt Carrington Study Worki,1 . • The current Mt Carrington 2025 MRE contains 1.2Moz AuEq at 1.1g/t AuEqii,2 : Item Jun 2022 MRE (JORC 2004/2012)iii 2025 MRE (JORC 2012)ii 2026 MRE (WSP) Tonnes (kt) 19,140 34,396 +80% FROM 2022 Underway Indicated Resource (kt) 6,380 11,400 +79% FROM 2022 Underway Gold (koz Au) 341.0 652.5 +91% FROM 2022 Underway Silver (koz Ag) 23,247 24,294 +5% FROM 2022 Underway Expanded silver drilling to be incorporated into MRE • The updated MRE will include high-grade silver drill results not previously incorporated, including: o 26.5m at 220g/t Ag and 0.1g/t Au from 133.3m (MODD004). Expanded copper drilling to be incorporated into MRE • It will also include high-grade and previously unincorporated copper drill results, including: o 18.9m at 5.8% Cu from 58m and 10.1m at 7.26% Cu from 88m (KYDD001). Goals and expected outcomes for a new MRE • The updated MRE is being prepared to inform the planned optimisation of the 2026 Scoping Study. • Improved confidence categories in the updated resource, moving Inferred Resources to Indicated Resources, supported by a previously unincorporated specific gravity (SG) and drilling dataset. • A potentially larger resource that is supported by recent progress in defining a clear and simple metallurgical processing pathway and the saleability of precious metal concentrate. Key inputs being incorporated • Updated SG density measurements and drilling validated across the Mt Carrington Project area. • Revised metal payability assumptions, informed by the outcomes of the Ausenco 2026 Scoping Study. • Updated gold, silver and copper prices compared to those applied in the 2025 MRE. • A review of the Mt Carrington geological and mineralisation models. Upcoming work and news flow • New 2026 Mineral Resource Estimate (MRE) at Mt Carrington expected within four weeks. • Drilling at the Emu Prospect is underway with results expected four-six weeks after final drill hole. • Scoping Study Optimisation to commence following completion of the new MRE. ASX Announcement 1 July 2026 ASX: LGM 1. See Endnotes on Page 7 for References 2. See Appendix A on Page 6 for Eq formulas. Page 2 of 7 ASX: LGM SIGN UP TO LEGACY MINERALS’ INTERACTIVE INVESTOR HUB Legacy Minerals Holdings Limited (ASX: LGM, “LGM”, “the Company” or “Legacy Minerals”) is pleased to advise that it has commenced an update to the Mineral Resource Estimate (MRE) for its flagship Mt Carrington Gold-Silver-Copper Project in NSW (EL6273, EL9616, EL9727, ALA753F iv ). Management Comment: Legacy Minerals CEO & Managing Director, Christopher Byrne, said: "Legacy Minerals has appointed leading global advisory firm WSP to update the Mt Carrington Mineral Resource Estimate. This is a critical step and a momentum-shifting opportunity for the Project and the Company. Since the 2025 estimate, we have validated large-density datasets across the Project, the metal price environment has strengthened, and we have identified a clear, simple mining and processing pathway through the work completed as part of the 2026 Ausenco Scoping Study. Combined with updated payability assumptions and a fresh review of our geological and mineralisation models, this MRE is intended to better define the gold, copper and especially the silver endowment, as well as increase the Indicated Resource tonnage at Mt Carrington. If this work is successful, it would establish solid foundations for the upcoming Scoping Study Optimisation and has the potential to significantly improve the already impressive baseline results of the Ausenco 2026 Scoping Study.” Mineral Resource Estimate Update Legacy Minerals has commenced an update to the Mt Carrington Mineral Resource Estimate, building on the estimate last reported in early 2025. The update is being undertaken to reflect the most current data and assumptions available, and to support the planned optimisation of the Mt Carrington 2026 Scoping Study. The work incorporates four key inputs: 1. Updated SG density measurements collected across the Project area; 2. The higher gold, silver and base metal price environment prevailing today relative to the time of the 2025 estimate; 3. Revised Reasonable Prospects for Eventual Economic Extraction (RPEEE) assumptions informed by the outcomes of the 2026 Ausenco Scoping Study and 2026 Metallurgical Bridging Studyi ; and 4. A review of the geological and mineralisation models for the deposits. The Company is encouraged by recent progress made through the delivery of the 2026 Ausenco Scoping Study, which defined a straightforward, simple mining and processing pathway that delivers a highly saleable concentrate product. Next Steps • Mineral Resource Estimation work on the Project is ongoing in preparation for an updated Scoping Study. • Drilling is ongoing at the Emu Prospect and is expected to take approximately 4-6 weeks to complete, with full assays expected to be returned within 4-6 weeks from final core hole processing. • After the Emu Prospect drilling is completed, the drill rig will then mobilise to Mascotte, where drilling will follow up on results from the first campaign. • The dipole-dipole induced polarisation survey is expected to be completed within the next three weeks. Results from the surveys are anticipated shortly after the data review and interpretation. See ‘Endnotes’ on Page 7 for references Page 3 of 7 ASX: LGM SIGN UP TO LEGACY MINERALS’ INTERACTIVE INVESTOR HUB Figure 1. Mt Carrington regional geology plan view showing Major Prospects and known mineralisation projected to surface (yellow) and gold-dominant mineralisation (orange) over the Drake Volcanics and historically mapped mineralised veins (red) Page 4 of 7 ASX: LGM SIGN UP TO LEGACY MINERALS’ INTERACTIVE INVESTOR HUB Approved by the CEO & Managing Director. For more information: Investors: Chris Byrne CEO & Managing Director chris.byrne@legacyminerals.com.au +61 (0) 499 527 547 Media: Nicholas Read Read Corporate nicholas@readcorporate.com.au +61 (0) 419 929 046 DISCLAIMER AND PREVIOUSLY REPORTED INFORMATION Information in this announcement is extracted from reports lodged as market announcements referred to above and available on the Company’s website https://legacyminerals.com.au/. The Company confirms that it is not aware of any new information that materially affects the information included in the original market announcement and that all material assumptions and technical parameters underpinning the estimates in the relevant market announcement continue to apply and have not materially changed. This announcement contains certain forward-looking statements. Forward-looking statements are only predictions and are subject to risks, uncertainties and assumptions which are outside of the control of Legacy Minerals Holdings Limited (LGM). These risks, uncertainties and assumptions include commodity prices, currency fluctuations, economic and financial market conditions, environmental risks and legislative, fiscal or regulatory developments, political risks, project delay, approvals and cost estimates. Actual values, results or events may be materially different to those contained in this announcement. Given these uncertainties, readers are cautioned not to place reliance on forward-looking statements. Any forward-looking statements in this announcement reflect the views of LGM only at the date of this announcement. Subject to any continuing obligations under applicable laws and ASX Listing Rules, LGM does not undertake any obligation to update or revise any information or any of the forward-looking statements in this announcement to reflect changes in events, conditions or circumstances on which any forward-looking statements is based. COMPETENT PERSON’S STATEMENT The information in this Report that relates to Exploration Targets, Exploration Results, Mineral Resources or Ore Reserves is based on information compiled by Thomas Wall, a Competent Person who is a Member of the Australian Institute of Geoscientists. Mr Wall is the Technical Director and a full-time employee of Legacy Minerals Pty Limited, the Company’s wholly-owned subsidiary, and a shareholder of the Company. Mr Wall has sufficient experience that is relevant to the style of mineralisation and type of deposit under consideration and to the activity being undertaken to qualify as a Competent Person as defined in the 2012 edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves. Mr Wall consents to the inclusion of the matters based on this information in the form and context in which it appears in this announcement. Page 5 of 7 ASX: LGM SIGN UP TO LEGACY MINERALS’ INTERACTIVE INVESTOR HUB About Legacy Minerals Legacy Minerals is an ASX-listed public company that has been exploring gold, silver, copper, and base-metal projects in NSW since 2017. The Company’s projects present significant discovery opportunities for shareholders, with a focus on discovery drilling and the development of the Mt Carrington Project. Cu-Au Mt Carrington (EL6273, EL9616, EL9727, ALA75) Large caldera (~150km2 ) with similar geological characteristics to other major Pacific Rim low-sulphidation deposits. The current Mineral Resource of 1.2Moz AuEq (115Moz AgEq) Au-Ag Bauloora One of NSW’s largest low-sulphidation, epithermal systems with a 15km2 epithermal vein field. Ni-Co Nico Young Cobalt Blue MoU One of the largest nickel deposits in Australia with significant counter-cyclical exposure. Cu-Au Rockley Prospective for porphyry Cu-Au, situated in the Macquarie Arc Ordovician host rocks with historical high-grade copper mines. Au-Cu (Pb-Zn) Cobar Aurelia Metals Earn-In Undrilled targets next door to the Peak Gold Mines and along strike of the CSA copper mine. Au-Ag Black Range Extensive low-sulphidation, epithermal system with limited historical exploration. Epithermal occurrences across 30km of strike. Au Harden Hill Tops Earn-In Substantial historical gold production from two high-grade and underexplored, orogenic systems. Cu-Au Thomson A new and unexplored Intrusion-related gold and copper search space with numerous ‘bullseye’ targets. Au-Cu Fontenoy Earth AI JV A highly prospective and underexplored area for PGE, Ni, Au and Cu mineralisation with significant drill intercepts. Figure 2. Location summary of Legacy Minerals’ Projects in NSW, Australia, and major mines and deposits. Page 6 of 7 ASX: LGM SIGN UP TO LEGACY MINERALS’ INTERACTIVE INVESTOR HUB Appendix A: Mt Carrington Mineral Resources9F9F4F4F v Prospect Classification Resource Tonnes and Grade Contained Metal Tonnes (Kt) Au (g/t) Ag (g/t) Cu% Pb% Zn% AuEq (g/t) Au (Koz) Ag (Koz) Cu (kt) Pb (kt) Zn (kt) AuEq (Koz) Strauss Indicated 2,818 1.1 3.1 0.09 0.07 0.6 1.5 98 281 2.5 2.0 16 136 Inferred 2,026 1.0 2.0 0.08 0.04 0.4 1.3 63 129 1.7 0.8 9 85 Kylo Indicated 2,842 1.1 2.1 0.07 0.05 0.4 1.4 103 191 2.0 1.4 11 128 Inferred 2,081 0.6 3.8 0.11 0.06 0.6 1.0 40 251 2.2 1.2 13 67 Guy Bell Inferred 2,512 0.7 2.3 0.16 0.08 0.6 1.2 58 188 4.0 2.1 15 97 Carrington Inferred 2,236 0.5 5.6 0.14 0.08 0.2 0.8 33 403 3.1 1.7 4 58 Lady Hampden Indicated 2,136 0.7 61.9 0.01 0.03 0.07 1.49 49 4,251 0.2 0.7 1.6 102 Inferred 2,125 0.7 35 0.01 0.04 0.08 1.17 50 2,388 0.2 0.8 1.7 80 Silver King Indicated 469 0.12 80 0.01 0.03 0.07 1.13 1.8 1,200 0.05 0.14 0.3 17 Inferred 106 0.05 53 0.01 0.02 0.05 0.72 180 0.2 0.01 0.02 0.1 2 Lead Block Inferred 215 0.21 44 0.01 0.03 0.08 0.79 1.5 307 0.02 0.07 0.2 5 Mt Carrington Group Total 19,566 1.1 15.2 0.08% 0.06% 0.37% 1.2 677.3 9589.2 15.98 10.93 71.9 777 White Rock North Inferred 2,039 0.05 70 0.01 0.14 0.11 0.99 3.5 4,592 0.3 2.8 2.3 65 White Rock Indicated 3,135 0.05 66 0.02 0.22 0.7 1.23 5.4 6,629 0.6 7 22.8 124 Inferred 1,051 0.08 37 0.02 0.16 0.6 0.85 2.6 1,258 0.2 1.7 6.5 29 White Rock Group Total 6,225 0.1 62.4 0.02% 0.18% 0.51% 1.1 12 12,479 1 12 32 218 Red Rock Inferred 8,605 0.5 7.4 0.04 0.12 0.49 0.8 144 2046 3.2 10.3 43 232 Total Resource Indicated 11,400 0.7 34.2 0.05% 0.10% 0.45% 1.4 257 12,552 5 11 52 507 Inferred 22,996 0.5 15.9 0.06% 0.09% 0.41% 1.0 396 11,742 15 22 95 720 Total 34,396 0.6 22.0 0.06% 0.10% 0.43% 1.1 653 24,294 20 33 147 1,227 All tonnages reported are dry metric tonnes. Minor differences may occur due to rounding to appropriate significant figures. AuEq calculated using the formula: AuEq = Au + 0.00986xAg + 1.237237xCu + 0.3493xZn + 0.2784xPb. Formulas calculated using silver price of A$43/oz, gold price of A$3,600/oz, copper price of A$14,000/t, zinc price of A$4,200/t and lead price of A$3,150/t. In the opinion of the Company, all elements included in the metal equivalent calculation have a reasonable potential to be sold and recovered based on current market conditions and metallurgical test work up to 2017. Page 7 of 7 ASX: LGM SIGN UP TO LEGACY MINERALS’ INTERACTIVE INVESTOR HUB Endnotes i LGM ASX Release, 1 September 2025, Metallurgical Study Commences at Mt Carrington Project, LGM ASX Release, 19 November 2025, New Study underway after positive Met review - Mt Carrington ii LGM ASX Release, 1 September 2025, Metallurgical Study Commences at Mt Carrington Project, LGM ASX Release, 12 December 2025, New Silver Targets and Drill Approvals at Mt Carrington, LGM ASX Release, 13 March 2025, New Drake Resource of 0.8Moz Gold-Eq and 35Moz Silver-Eq iii ASX: WRM, 9 October 2017, Improved Gold Resources at Mt Carrington Gold-Silver Project, ASX: WRM, 24 March 2016, Mt Carrington Indicated & Inferred Mineral Resource Summary, ASX: WRM, 13 February 2012, Mt Carrington Mineral Resource Estimate, ASX: WRM, 11 July 2013, Mt Carrington Mineral Resource Estimate Update, ASX: WRM, 20 November 2013, Mt Carrington Mineral Resource Estimate Update, ASX: RXM, 10 December 2008, Guy Bell Mineral Resource Estimate, ASX: WRM, 19 August 2020, Stage One (Gold First) 2020 Pre-Feasibility Study Update, ASX: TMZ, 22 June 2022, Updated Polymetallic MRE for Mt Carrington Strauss and Kylo iv ASX Release LGM, 13 November 2025, Clarification - Expected Timing Drake Resource JORC 2012 MRE v ASX Release LGM, 13 March 2025, New Drake Resource of 0.8Moz Gold-Eq and 35Moz Silver-Eq, LGM ASX Release, 1 September 2025, Metallurgical Study Commences at Mt Carrington Project