Announcement PDF 79 Au 47 Ag Exploring for World Class Deposits RRS Gold Coast 18 Sep 2025 Christopher Byrne CEO and Managing Director chris.byrne@legacyminerals.com.au +61 (0) 499 527 547 29 Cu Disclaimer This presentation may contain certain statements and projections provided by or on behalf of Legacy Minerals Holdings Limited (ASX: LGM, Legacy Minerals, or the Company) with respect to the anticipated future undertakings. These forward-looking statements reflect various assumptions by or on behalf of Legacy Minerals. Accordingly, these statements are subject to significant business, economic and competitive uncertainties and contingencies associated with the mining industry which may be beyond the control of Legacy Minerals which could cause actual results or trends to differ materially, including but not limited to price and currency fluctuations, geotechnical factors, drilling and production results, development progress, operating results, reserve estimates, legislative, fiscal and regulatory developments, economic and financial markets conditions in various countries, approvals and cost estimates, environmental risks, ability to meet funding requirements, share price volatility. Accordingly, there can be no assurance that such statements and projections will be realised. Legacy Minerals makes no representations as to the accuracy or completeness of any such statement of projections or that any forecasts will be achieved. Additionally, Legacy Minerals makes no representation or warranty, express or implied, in relation to, and no responsibility or liability (whether for negligence, under statute or otherwise) is or will be accepted by Legacy Minerals or by any of their respective officers, directors, shareholders, partners, employees, or advisers as to or in relation to the accuracy or completeness of the information, statements, opinions or matters (express or implied) arising out of, contained in or derived from this presentation or any omission from this presentation or of any other written or oral information or opinions provided now or in the future to any interested party or its advisers. In furnishing this presentation, Legacy Minerals undertakes no obligation to provide any additional or updated information whether as a result of new information, future events or results or otherwise. Nothing in this material should be construed as either an offer to sell or a solicitation of an offer to buy or sell securities. It does not include all available information and should not be used in isolation as a basis to invest in Legacy Minerals. This presentation contains exploration results and historic exploration results as originally reported the Company’s Prospectus dated 28 July 2021 and released 9 September and subsequent ASX market announcements. The Company confirms that it is not aware of any new information that materially affects the information included in the original market announcements and that all material assumptions and technical parameters underpinning the estimates in the relevant market announcements continue to apply and have not materially changed. The Company confirms that the form and context in which the Competent Persons’ findings are presented have not been materially modified from the original market announcements. The information in this presentation 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 is a full-time employee of Legacy Minerals Limited and a shareholder, who 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 in the report of the matters based on his information in the form and context in which it appears. The release of these presentation materials has been authorised by the Board. ASX: LGM 2 3 Investment Highlights 1.2Moz AuEq1 underpins company valuation 0.7Moz of contained gold plus 24Moz of contained silver High impact discovery drilling commencing Near term discovery catalysts Exploring for World Class Deposits Gold, silver, and copper focus with 9,000km2 land position in NSW 100% owned projects and Joint Venture Optionality Map of NSW showing Legacy Minerals tenements and geographical location of major mining and exploration projects 100% ownership of projects give shareholders direct upside to discoveries & partnerships minimise dilution and financing risk Low shares and issued and $7.75M2 in funding Recent capital raise provides the platform for drilling, discovery, and study work ASX: LGM Note: references on this slide are in the Appendix – Endnotes on Slides 24 4 Corporate Overview Share Price $0.175 Market Cap $29M Enterprise Value $22M 12 Month Share Price Share Price $AUD 0.3 4000000 0.25 0.2 3000000 0.15 2000000 0.1 1000000 0.05 0 18/09/2024 0 18/02/2025 Volume Team Dr David Carland Non-Executive Chairman Matthew Wall Non-Executive Director ASX: LGM Volume 5000000 0.35 Shares 168M Cash $7M Options 32M ($0.21 exp Jan 26) 21M ($0.30 exp Jan 27) Joint Venture Funding $28.3M Debt Nil 18/07/2025 Price Christopher Byrne CEO and Managing Director Douglas Menzies Non-Executive Director Thomas Wall Exploration Manager and Executive Director Dr John Greenfield Chief Technical Advisor 1 At 17 Sep 2025 Mt Carrington 1.2Moz Gold Equivalent 79 Au 47 Ag 29 Cu 6 Mt Carrington – New Vision, New Approach A rare advanced project with exceptional growth potential Discovery Upside – Kainantu style Cu-Au deposit (~18Moz AuEq)1 • • One of the largest mineral systems in NSW contained within a 160km2 caldera Target rich – significant untested discovery opportunities Open Pit MRE 1.2Moz AuEq2 • 34.4Mt at 1.1g/t AuEq • Total 0.65Moz Au, 24.3Moz Ag, 147Kt Zn, 33Kt Pb, 20Kt Cu 100 AuEq g/t m hits demonstrate potential for major deposit3 • 12.82m at 48g/t Au and 2,589g/t Ag from 16m (ALA) • 118m at 1.71g/t Au, 6.9g/t Ag, and 1.12% Zn from 2m (ALA) • 18.9m at 5.8% Cu from 58m and 10.1m at 7.26% Cu from 88m (ALA) Development progress - Mt Carrington Area ALA75 • Currently an Assessment Lease Application (ALA) • Bridge between an exploration license and mining lease ASX: LGM Note: references on this slide are in the Appendix – Endnotes on Slides 24 7 New 2025 1.2Moz Gold-Equivalent Resource1 One of NSW’s largest undeveloped epithermal deposits 34.4Mt at 1.1g/t gold-equivalent (AuEq) White Rock Mt Carrington Substantial platform for growth • • • • New MRE provides company exceptional base to start adding ounces through drilling and discovery. Gold dominant open pit resources provide indicate potential lower initial OPEX production. Potential for low Capex due to site infrastructure High-grade underground resource potential yet to be targeted with drilling and incorporated into resource. Red Rock ASX: LGM Note: references on this slide are in the Appendix – Endnotes on Slides 24 8 2025 Phase 1 Scoping Study1 Robust base case Financials A$5,000 NPV8 $388M IRR 141% Free Cash Flow $405M Mining Metrics ASIC A$1,726, open-pit, 34koz Au pa, A$47M CAPEX 17% 83% 83% of the MRE is outside of 2025 SS Potential Future Work • Larger Stage 2 Scoping Study – assessing the entire 1.2Moz AuEq resource, not just 0.2Moz AuEq • Ausenco engaged for metallurgical review2 Significant sunk capital – infrastructure in place • Opens pits pre-stripped, haul roads completed, tailings dam built, 750ML freshwater dam installed, grid easement constructed, minor site infrastructure ASX: LGM Note: references on this slide are in the Appendix – Endnotes on Slides 24 9 New technology unpacking large mineral system ~17km RTP magnetics with drill collars (black) 1 ASX: LGM Major Deposits2 New Geophysical Data2 Note: references on this slide are in the Appendix – Endnotes on Slides 24 10 New technology unlocking new targets Potential depth and continuity that is untested • • • Detailed Airborne MT data review identifies significant conductivity trends1 Experts engaged familiar with MT survey data used by K92 Mining Inc on the Kainantu Mine Compelling discovery target opportunities present both near-mine and regionally ASX: LGM Mobile MT Resistivity 2D Inversion Section for Line 2000 with interpretation of MT features. Note: references on this slide are in the Appendix – Endnotes on Slides 24 11 Drilling approved and commencing imminently New conceptual targets being tested • • • Battery prospect first regional target to be tested in 30 years Potential for breccia hosted and epithermal-porphyry related mineralisation Up to 4,500m of drilling planned ASX: LGM Mobile MT Resistivity 2D Inversion Section for Line 2290 and new areas of interest (yellow marker) with interpretation of MT features1. Note: references on this slide are in the Appendix – Endnotes on Slides 24 12 Size of the Prize: K92 – Exceptional AuEq Growth Epithermal prophy systems potential to extend at depth • Across the Mt Carrington Projects there are 3,319 drill holes with an average depth 49m • Less than 5% of the drilling is deeper than 150 downhole length Kainantu acquisition from Barrick 0.8Moz AuEq 2015 Kainantu 2.2Moz AuEq 2017 2021 Kainantu now 18 Moz AuEq1 2024 ASX: LGM 2025 Note: references on this slide are in the Appendix – Endnotes on Slides 24 13 Textural Comparison – Judd (K92) and Mt Carrington Mt Carrington1 Cautionary Note Visual Estimates of Mineralisation: ‘Visual estimates of mineral abundance should never be considered a proxy or substitute for laboratory analyses where concentrations or grades are the factor of principal economic interest. Visual estimates also potentially provide no information regarding impurities or deleterious physical properties relevant to valuations.’ Kainantu – Judd2 KARDD0002 231.45: 2.39g/t Au, 0.03% Cu, 4g/t Ag ASX: LGM KARDD0002 103.5m,7.39g/t Au, 7.34% Cu, 73g/t Ag KARDD0002 210.3m, 2.59g/t Au, 0.21% Cu, 11g/t Ag Note: references on this slide are in the Appendix – Endnotes on Slides 24 14 Large Undrilled Targets 3D modelled IP highlighting undrilled chargeability extensions1 Gladstone North Porphyry Target Kylo All Nations Guy Bell Silver King Mt Carrington South 1,500m ASX: LGM Oblique view looking north of 3D merged model of existing IP over Mt Carrington, showing isosurfaces (Chg3D 12) and historical drill traces. Note that WCDD003 drillhole in the western end of the survey area appears to miss the main chargeability high at the porphyry target area. Note: references on this slide are in the Appendix – Endnotes on Slides 24 15 Historical near-miss presents opportunity 3D modelled IP – epithermal/porphyry target1 Section view looking NE A’ Undrilled chargeable features A A’ A WCDD003 Drill hole WCDD003 did not test chargeable feature Isosurfaces (Chg3D 12) of chargeability and survey line locations over the Mt Carrington area. ASX: LGM Cross section of 3D merged model of existing IP over Mt Carrington and historical drill trace WCDD003. Note that WCDD003 drillhole appears to miss the main chargeability high at the porphyry target area and is located approximately 250m to the south of the modelled chargeability feature. Note: references on this slide are in the Appendix – Endnotes on Slides 24 Thomson Big belt scale exploration play 17 Thomson Belt Scale Au-Cu Opportunity Frontier exploration across 5,500km2 Big targets - Intrusion Related Au-Cu Potential • Concept confirmed through analysis of historic drilling • Target rich environment • • Numerous bulls-eye magnetic and gravity anomalies Large alteration footprints One of the most under-explored orogens in Australia • Early mover advantage and big discovery exposure • Belt scale exploration opportunity (5,500km2) • Successful discovery opens multitude of walk-up drill targets Pathway to Discovery • Cover sequence geophysically transparent • Shallow cover means cost-effective drilling rates. Red Hill Minerals Royalty Acquisition • Recent acquisition by Josuha Pit led team demonstrates potential view for the next major discovery. ASX: LGM Project overview showing EL9190, EL9194, EL9278 and examples of “bullseye” magnetic targets. Note: references on this slide are in the Appendix – Endnotes on Slides 24 18 Big-scale opportunity De Grey’s Hemi Project2 To scale Legacy Minerals Thomson Project To scale Tongo 1 IRG target Structure H1 H2 F1 F17 F3 F4 F5 & F6 Paroo ASX: LGM 230km Cut-A Cut-AC Cut-B Cut-D Note: references on this slide are in the Appendix – Endnotes on Slides 24 19 CUT-B and Cut A Anomaly1 Near-Miss Drilling – Cut A Compelling Geophysical Targets Confirmed Intrusion related Au-Cu Potential • • • • Proof of concept confirmed in historic drilling Untested gravity anomaly along strike of strong and extensive alteration intercepted in drilling Proximal IRG-Cu pathfinders indicate nearby prospectivity Gravity anomaly is undrilled Plan view of the CUT-B magnetic body and adjacent gravity high anomaly. ASX: LGM • 377m at 0.1g/t Au (no cut-off) from 225m to 602m including, o 41m at 0.4g/t Au from 420m (no cut-off) including,  8m at 0.5g/t Au from 420m, and  15m at 0.65g/t Au from 446m Plan view of Havieron magnetic body and adjacent gravity high Cut-B: untested gravity high anomaly (density >2.8) adjacent to magnetic anomaly shells (>0.005 SI) (section 249,700mE, MGA94 z55). Note: references on this slide are in the Appendix – Endnotes on Slides 24 Joint Venture Projects $28.5M in JVs sees sustained discovery effort 21 The upside in a JV - non-dilutive potential for value creation Like 100% owned projects, partnerships can deliver significant returns for shareholders SP: $28 MC: $1.04b SP: $28.50 MC: $355m SP: $6.51 MC: $257m SP: £0.371 MC: £1.48b SP: £0.99 MC: £134m SP: $0.42 MC: $3.24m SP: $0.36 MC: $3.13m SP: $0.56 MC: $5.1m Aber Resources 30/70 JV with Rio Tinto ASX: LGM Abitibi Royalties 30/70 JV Osisko Mining AuEx Ventures 49/51 JV with Frontier SP: £0.018 MC: £58.6m SP: £0.014 MC: £12m Greatland Gold 25/75 JV with Newcrest Mariana Resources 30/70 JV with Lidya Note: references on this slide are in the Appendix – Endnotes on Slides 24 22 Positioned for growth and discovery success Ongoing drilling and target generation Fontenoy Q4 Drilling Results Thomson Q4 Drilling Mt Carrington Q3-Q4 Drilling Harden (JV) Q4 Drilling Results Mt Carrington Q4 Initial Drilling Results Mascotte, Emu, Battery 2025 Q3-Q4 Investment Highlights 1.2Moz AuEq1 underpins company valuation High impact discovery drilling commencing Exploring for World Class Deposits 100% owned projects and Joint Venture Optionality Low shares and issued and $7.75M in funding ASX: LGM Thank you Christopher Byrne CEO and Managing Director chris.byrne@legacyminerals.com.au +61 (0) 499 527 547 ASX: LGM Appendices – Endnotes Intro Slide 3: 1 LGM ASX Release, 18 September 2025, Metallurgical Study Commences at Mt Carrington Project 2 LGM ASX Release, 16 May 2025, $7.75M Secured in Institutional Backed Raise MTC Slide 6: 1 K92 Mining Inc. Growing Production & Transformative Discoveries Site visit presentation, October 23-24, 2024; 2 LGM ASX Release, 18 September 2025, Metallurgical Study Commences at Mt Carrington Project; 3 ASX LGM Release 29 October 2024 3,050gt Silver and 79gt Gold in Historical Drake Drilling MTC Slide 7: 1 LGM ASX Release, 18 September 2025, Metallurgical Study Commences at Mt Carrington Project MTC Slide 8: 1 ASX Release LGM, 15 April 2025, Amendment - Release 11 April 2025 ; 2 LGM ASX Release, 18 September 2025, Metallurgical Study Commences at Mt Carrington Project MTC Slide 9: 1, MinView | Regional NSW | Mining, Exploration and Geoscience ; 2 LGM ASX Release, 25 August 2025, Drilling Approval and New Geophysical Targets - Mt Carrington Project MTC Slide 10, 11, 14, 15: ASX LGM Release, 25 August 2025, Drilling Approval and New Geophysical Targets - Mt Carrington Project MTC Slide 12: Otterburn Announces K92 Completes Purchase of Kainantu Mine From Barrick Gold Corp. and Files Initial Independent Technical Report and Resource Estimate, March 11, 2015 (Otterburn Resources Corp), [1] Growing Production & Transformative Discoveries, Site Visit Presentation, October 23-24, 2024, K92 Mining Inc.; Independent Technical Report Mineral Resource Estimate Blue Lake Porphyry Deposit, Kainantu, Papua New Guinea, K92 Mining Inc., 01 August 2022; Independent Technical Report, Kainantu Gold Mine, Updated Integrated Development Plan, Kainantu Project, Papua New Guinea, Definitive Feasibility Study and Preliminary Economic Analysis, National Instrument 43-101 Technical Report, January 1, 2024 MTC Slide 13: 1 smedg.org.au/wp-content/uploads/2022/05/Corbett-M-W-2022-B.pdf 2 K92 Mining Announces Signicant Maiden Drilling Results From Arakompa – Intersecting Multiple High Grade Lodes Including 7.2 M at 24.76 G/T AuEq & 149.4 M at 2.12 G/T AuEq Bulk Intersection Near Surface, K92 Mining Inc. Thomson Slide 17: ASX Release LGM, 14 August 2025, Thomson Drilling Assays and Further Drilling Planned, ASX Release LGM, 5 May 2025,Red Hill Minerals Acquires Royalty in LGM Thomson Project, Slide 18: 1 De Grey Mining Consolidated Annual Financial Report, 2020, Slide 19: ASX Release LGM, 14 August 2025, Thomson Drilling Assays and Further Drilling Planned, ASX Release LGM 9 December 2024 Thomson Drill Targets Announcement 4 December 2024 – Amended, Slide 11: 1 AIM release GGP 21 December 2023, Havieron Mineral Resource Estimate update, Exceptional Mineral Resource growth continues at Havieron. 2 Hanneson, J. E., & Baxter, C. N. (2022). Discovery of the Havieron Gold-Copper deposit, WA. Preview, 2022(219), 42–47. Slide 12: 1 ASX Release LGM 9 December 2024 Thomson Drill Targets Announcement 4 December 2024 – Amended Slide 16: 1 ASX Release LGM 9 December 2024 Thomson Drill Targets Announcement 4 December 2024 – Amended, Slide 13: 1 ASX Release LGM 9 December 2024 Thomson Drill Targets Announcement 4 December 2024 Amended Joint Ventures Slide 21: GoldDiscovery Group, https://www.linkedin.com/posts/golddiscovery-media-b-v_why-buy-a-junior-miner-with-a-minority-stake-activity7173060437201129472-UGoE?utm_source=share&utm_medium=member_desktop ASX: LGM 24 Appendix A: Mt Carrington Mineral Resources Prospect Resource Tonnes and Grade Classification 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) 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 Indicated 2,842 1.1 2.1 0.07 0.05 0.4 1.4 103 191 2.0 1.4 11 128 Inferred Inferred Inferred 2,081 2,512 2,236 0.6 0.7 0.5 3.8 2.3 5.6 0.11 0.16 0.14 0.06 0.08 0.08 0.6 0.6 0.2 1.0 1.2 0.8 40 58 33 251 188 403 2.2 4.0 3.1 1.2 2.1 1.7 13 15 4 67 97 58 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 Lead Block Inferred Indicated Inferred Inferred 2,125 469 106 215 0.7 0.12 0.05 0.21 35 80 53 44 0.01 0.01 0.01 0.01 0.04 0.03 0.02 0.03 0.08 0.07 0.05 0.08 1.17 1.13 0.72 0.79 50 1.8 180 1.5 2,388 1,200 0.2 307 0.2 0.05 0.01 0.02 0.8 0.14 0.02 0.07 1.7 0.3 0.1 0.2 80 17 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 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 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 Strauss Kylo Guy Bell Carrington Lady Hampden Silver King White Rock Total Resource 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. ASX: LGM