Slide 1: Corporate Presentation April 2026
S OUTH AME R IC A MEJILLONES MARIMACA ANTOFAGASTA SANTIAGO For personal use only MARIMACA C H IL E COPPER CO RPORATE PRESENTATION Exceptional Development Project, Outstanding Exploration Potential April 2026 TSX: MARI ASX: MC2
Slide 2: Disclaimer
Disclaimer The following notices and disclaimers apply to this presentation and you are therefore advised to read this carefully before reading or making any other use of this presentation or any information contained in this presentation. This presentation is dated the 2nd of April 2026 and has bee
Slide 3: Disclaimer
Disclaimer Forward-looking statements and information (including Marimaca’s belief that it has a reasonable basis to expect it will be able to fund the costs of the Project for its estimated life of mine) are (further to the above) based on the reasonable assumptions, estimates, analysis and opinion
Slide 4: Disclaimer
Disclaimer The information in this presentation that relates to the Company's exploration results has been extracted from the Company's previous ASX and SEDAR announcement[s] including: ASX and SEDAR announcement[s] entitled “MOD Feasibility Study Confirms Robust Capital Intensity and 30%+ IRR” with
Slide 5: Disclaimer
Disclaimer Not financial product advice This presentation, and the information provided in it, does not constitute, and is not intended to constitute, financial product or investment advice, financial, legal, tax, accounting or other advice, or a recommendation to acquire any securities of Marimaca.
Slide 6: Introduction: Marimaca Copper
Introduction: Marimaca Copper Three core value pillars Pampa Medina: Game → Exploration: Complementary → MOD: Near Term → For personal use only Production Changing Growth Opportunities DFS Complete – 50ktpa run rate Tier 1 discovery opportunity Near-mine oxide potential production ▪ Leading capita
Slide 7: Where? Antofagasta Region, Chile
Where? Antofagasta Region, Chile Clear regional scale synergies – low altitude, close to all major infrastructure For personal use only CHILE’S NEW COPPER DISCOVERY 7 Advancing Development With District Scale Potential
Slide 8: Introduction: Marimaca Copper Project
Introduction: Marimaca Copper Project MEJILLONES MARIMACA For personal use only ANTOFAGASTA D FS c o m p l e te SANTIAGO Continuous growth of Low strip ratio open pit oxide copper resources operation with CHILE conventional heap leach Rapidly advancing to a Low execution risk CHUQUICAMATA MANTOS DE
Slide 9: MOD Environmental Approval Received
MOD Environmental Approval Received Formal Resolución de Calificación Ambiental (“RCA”) acquired in November Key Environmental Approval for the MOD Project ▪ Marks the formal approval of the Company’s DIA submission made in December For personal use only 2024 ▪ Multiple Community engagement sessions
Slide 10: Marimaca: Green Copper
Marimaca: Green Copper Mining Project of the Future WATER – recycled seawater supply secured from the Bay of Mejillones For personal use only POWER – certified renewable electricity supply available COMMUNITIES – no community land overlap, skilled local workforce IMPACT – limited flora & fauna
Slide 11: Key Workstreams in 2026
Key Workstreams in 2026 MOD Project Advancement Exploration For personal use only ▪ MOD Detailed ▪ Site Early ▪ Project ▪ Pampa Design + Works pre-FID Financing Medina Engineering identified for workstreams 100,000m drill with execution 2026 underway program in strategy to be 2026 ▪ Long-lead ▪ Posi
Slide 12: Marimaca Oxide Deposit: 2025 DFS Results
Marimaca Oxide Deposit: 2025 DFS Results Low Strip Ratio, High Margin Project with Industry Leading Capital Intensity For personal use only US$1.1bn US$2.09/lb US$587m Post-Tax NPV8(1) 2nd Quartile AISC(2) Pre-Production Capex 39% IRR with 2.2-year payback period C1 cash cost of US$1.69/lb Initial c
Slide 13: MOD 2025 DFS Consultants
MOD 2025 DFS Consultants Specialist consultants with significant experience in the region 2025 DFS prepared by Marimaca team → in conjunction with Ausenco and NCL Processing Metallurgical ▪ Led by Ausenco and NCL – two For personal use only prominent engineering Carlos Garcia consultants in the regi
Slide 14: MOD DFS: Results
MOD DFS: Results Simple mining & processing support robust margins First 5 Years of Metric Unit Steady State(1) LOM Simple open pit mining with LOM strip ratio of 0.8:1 Mining Summary → (including pre-stripped material) Total Ore Mined kt 80,683 178,635 ▪ P&P Mineral Reserve of 179Mt @ 0.42% Cu for
Slide 15: MOD DFS: Capital Cost in Detail
MOD DFS: Capital Cost in Detail Strong technical fundamentals supporting globally competitive capital intensity Metric Unit Total % of Total Capital costs are within AACE Class 3 guidelines; expected Initial Capital Cost US$m $587 - → accuracy of -20% to +25% Mine US$m $24 4% ▪ Budget quotes obtaine
Slide 16: MOD DFS: Global Cu Project Benchmarking
MOD DFS: Global Cu Project Benchmarking Low initial capex and robust NPV reinforces MOD’s position among global peers Profability Index (NPV8% / Initial Capex) for Global Copper Projects Near Term Production (Pre 2028) Long Term Production (Post 2028) Marimaca 5.0 MOD positioned as one of the 4.0 Fo
Slide 17: MOD DFS: Unique Access to Critical Infrastructure
MOD DFS: Unique Access to Critical Infrastructure Location & access to infrastructure / utilities deliver lower execution risk Port of Mejillones – 25km For personal use only Power Spur and Line Seawater Pipeline Ripios Norte Open Pit Route 1 – National Highway Heap Leach & Antofagasta & Airport – 4
Slide 18: MOD DFS: Simple Open Pit Mining
MOD DFS: Simple Open Pit Mining Conventional truck and shovel operation through 8 phases of pit development DFS considers 8 phases of pit development to provide → consistent ore feed to the heap leach Plan view of pit phases & final pit shell ▪ Mine sequence developed to achieve a consistent, steady
Slide 19: MOD DFS: Resource Update
MOD DFS: Resource Update 93% of total resource tonnes now in Measured and Indicated categories 3D View of Marimaca Oxide Blanket Continued conversion of Inferred tonnage and → contained metal over the 2023 MRE ▪ Updated recoveries from Phase 7 metallurgical For personal use only testing now underpin
Slide 20: Water Supply: De-risked and sustainable
Water Supply: De-risked and sustainable Recycled seawater from Mejillones to supply the Marimaca Copper Project • Water option secured from the Bay of Mejilllones – recycled seawater ― De-risks water supply for the For personal use only MARIMACA COPPER Marimaca Project – intake is already PROJECT pe
Slide 21: MOD Processing: Simple SX-EW Processing
MOD Processing: Simple SX-EW Processing Low complexity processing supports robust project economics DFS Processing Flowsheet 3-stage crushing to achieve P80 passing → 12.5mm (1/2”) For personal use only ▪ Crushed ore agglomerated and acid cured with variable dose based on mineral sub-domain ▪ Ore st
Slide 22: Marimaca Oxides: Extensive Met Work Completed
Marimaca Oxides: Extensive Met Work Completed Marimaca has completed rigorous met testing on materials across the deposit Tests completed on materials from across the full extent of the deposit and addressed all defined → For personal use only mineral subzones Seven extensive phases of met testing c
Slide 23: Marimaca: Overview
Marimaca: Overview Infrastructure access lowers execution risk Close to all aspects required to build a mine For personal use only Proximity to first class utilities and infrastructure Water, Power, Transport, Communications Within 25km of Port of Mejillones Access to all major consumables for a SX-
Slide 24: Marimaca: Multi-Pronged Strategy
Marimaca: Multi-Pronged Strategy Developing, exploring and integrating a Tier-1 copper district in Chile Continued de-risking of the MOD ▪ RCA Approval received – key environmental permit in hand Project ▪ Phase 7 metallurgical program complete For personal use only Advancement ▪ Water supply engage
Slide 25: Complementary Exploration Targets
Complementary Exploration Targets 1 Strong ‘repetition’ style oxide resource discovery potential Cindy Exploration Target: Roble Exploration Compelling potential to add leachable 30-40Mt at 0.3-0.4% CuT Target: resources for future growth 20-30Mt at 0.2-0.3% CuT For personal use only Cedro Geophysic
Slide 26: Complementary Resources: Sierra de Medina Region
Complementary Resources: Sierra de Medina Region Compelling district scale potential through exploration Sierra de Medina Claim Block Geological Setting For personal use only Cachorro: 3,000kt Contained Cu 300 Mt at 1.0% Cu Pampa Medina & Madrugador Marimaca Oxide Deposit Pampa Medina & Madrugador:
Slide 27: Sierra de Medina Region
Sierra de Medina Region Compelling district scale potential through exploration Pampa Medina & Madrugador Acquisitions For personal use only →o Both located ~25km from the planned MOD processing plant as defined in the DFS High grade, shallow, which appears to be open- →o pitable mineralization and
Slide 28: Pampa Medina – a Game Changer
Pampa Medina – a Game Changer. Potential Tier-1 sulphide discovery with 100,000m drilling program ongoing District Scale View For personal use only SMR-06 SMRD-23 SMRD-21 SMRD-30 SMR-29 SMRD-26 Section 7,441,100-N SMR-05 SMD-01 SMR-04 SMRD-20 SMRD-17 SMD-04 SMRD-18 SMR-10 SMR-11 1.5km SWRD-03 SWRD-0
Slide 29: Pampa Medina – Drilling Delineated Extensions at Depth
Pampa Medina – a Game Changer. Drilling to date has delineated material extensions at depth and along strike Long Section E406900 Looking West For personal use only 800 m SMR-29 700 m 116m of 0.5% Cu from 204m Incl. 24m of 1.6% Cu and 15g/t Ag from 296m SMR-29 SMRD-30 162m of 0.6% SMRD-20 SMRD-30 Cu
Slide 30: Pampa Medina – 300m Step-out Holes, Section N7441100
Pampa Medina – a Game Changer. 300m step-out holes continue to confirm sulphide mineralization remains open Cross Section N7441100 Looking North For personal use only Western step-out holes assays pending SMRD-33 CHILE’S NEW COPPER DISCOVERY 30 Advancing Development With District Scale Potential
Slide 31: Pampa Medina – 300m Step-out Holes, Section N7440800
Pampa Medina – a Game Changer. 300m step-out holes continue to confirm sulphide mineralization remains open Cross Section N7440800 Looking North For personal use only 700m CHILE’S NEW COPPER DISCOVERY 31 Advancing Development With District Scale Potential
Slide 32: Pampa Medina – 300m Step-out Holes, Section N7440500
Pampa Medina – a Game Changer. 300m step-out holes continue to confirm sulphide mineralization remains open Cross Section N7440500 Looking North For personal use only SWRD-04 SWRD-02 SMRD-34 SMRD-24 SMRD-22 SMD-03 Volcanics SMRD-34 36m @ 1.08% Cu and SMD-03 SWRD-04 13.8g/t Ag from 158m 42m @ 0.72% C
Slide 33: Pampa Medina – High-grade Corridor Intercepts
Pampa Medina – a Game Changer. High-grade corridor returns consistent grade x thickness intercepts in line with world-class sediment-hosted deposits High Grade Corridor Pampa For personal use only 96% Drill Holes > 10 Cu% m 58% Drill Holes > 20 Cu% m Kupferschiefer(1) (1.6% Cu x 4.5m avg. thickness)
Slide 34: Pampa Medina – Extraordinarily Thick Sed Hosted
Pampa Medina – Extraordinarily Thick Sed Hosted Mineralized sediment at Pampa significantly thicker than the Kupferschiefer Typical Kupferschiefer sediment hosted deposit(1) Pampa Medina – SMRD-13 For personal use only Cu % Cp>Bn Mineralized Zone: 5m Mineralized Zone: 26m Cp-Bn Kupferschiefer 6m @ 1
Slide 35: Pampa Medina – Oxide Extensions
Pampa Medina – Oxide Extensions Recent drilling highlighting the district-scale oxide expansion New oxide zone discovered near surface approx. 800m from historical oxide Oxide Extension Drilling mineralization footprint Section 7,441,400-N For personal use only Section 7,440,800-N Section 7,440,500-
Slide 36: Pampa Medina – Oxide Extensions
Pampa Medina – Oxide Extensions Further proof of oxide mineralization with continuity to the north Cross Section N7441400 Looking North For personal use only 700 m SMR-29 SMR-29 116m of 0.51% Cu and 3.7g/t Ag from 204m SMRD-30 Incl. 24m of 1.62% Cu and 14.9g/t Ag from 296m SMRD-30 162m of 0.61% Cu a
Slide 37: Pampa Medina – Oxide Core
Pampa Medina – Oxide Core Near-surface, high-grade oxide core identified Cross Section N7440800 Looking North Faults For personal use only SMRD-16 Alluvium 30m @ 2.11% Cu and 17g/t Ag from 434m Oxide Volcanics Pampa Oxide Upper Sediments Incl. 10m @ 4.2% Cu and 38g/t Ag from 438m Hosted Manto 20m @
Slide 38: Pampa Medina – Oxide Core
Pampa Medina – Oxide Core Proving out near-surface oxide mineralization with high grade intercepts Cross Section N7440500 Looking North For personal use only SMRD-28 SMR-25 CHILE’S NEW COPPER DISCOVERY 38 Advancing Development With District Scale Potential
Slide 39: Marimaca: Summary
Marimaca: Summary Advancing Development & Outstanding Potential → A unique development stage copper asset with a clear development pathway to near-term production Tier 1 Location ▪ MOD DFS delivers strong US$1.1 NPV8% with industry leading capital intensity(1) For personal use only ▪ Key Environment
Slide 40: Appendices
For personal use only Appendices CHILE’S NEW COPPER DISCOVERY 20 Advancing Development With District Scale Potential
Slide 41: MOD DFS: Significant EBITDA and Free Cash Flow
MOD DFS: Significant EBITDA and Free Cash Flow Significant cash flow generation underpins compelling 2.5-year payback EBITDA and Margin (US$m) EBITDA EBITDA Margin 68% 68% 69% 67% 63% 63% For personal use only 58% 57% 53% 53% 33% $332 $330 $335 $328 27% $307 $282 25% $277 $225 $236 $229 $85 $51 $39
Slide 42: MOD DFS: Mining & Processing Profile
MOD DFS: Mining & Processing Profile Mine expansion in year 5 to accommodate increase in crushing capacity Waste Mined (Mt) Ore Mined (Mt) Strip Ratio 1.23 1.15 1.23 1.04 0.96 0.72 0.83 0.70 0.55 0.53 For personal use only 0.46 35 35 35 35 35 0.24 33 28 25 25 25 9 6 Year -1 Year 1 Year 2 Year 3 Year
Slide 43: Experienced Board
Experienced Board Experienced and Leading explorational, invested Board and Deep experience in regional and financial management team copper and Chile experience For personal use only Giancarlo Bruno Hayden Locke Tim Petterson Non-Executive Chairman CEO, Director Non-Executive Director › Significant
Slide 44: Experienced Management
Experienced Management Experienced and Leading explorational, invested Board and Deep experience in project and financial management team copper and Chile experience For personal use only Hayden Locke Nico Cookson Jose Antonio Merino CEO, Director President Managing Director, Chile and CFO › Strong
Slide 45: Corporate Structure
Corporate Structure $14.00 1,000,000 900,000 $12.00 800,000 $10.00 700,000 Share Price (C$/sh) For personal use only 600,000 $8.00 Volume 500,000 $6.00 400,000 $4.00 300,000 200,000 $2.00 100,000 - - Apr-25 May-25 Jun-25 Jul-25 Jul-25 Sep-25 Oct-25 Oct-25 Dec-25 Jan-26 Feb-26 Mar-26 Apr-26 Capital S
Slide 46: 2025 Mineral Resource Estimate
2025 Mineral Resource Estimate Cut-off Measured Indicated Measured + Indicated Inferred grade (% CuT) Quantity Quantity Quantity Quantity CuT [%] CuS [%] CuT [%] CuS [%] CuT [%] CuS [%] CuT [%] CuS [%] For personal use only Mt kt kt kt 0.40 44.6 0.73 0.44 31.1 0.65 0.36 75.7 0.70 0.41 4.6 0.56 0.26
Slide 47: 2025 Ore Reserve
2025 Ore Reserve Contained Tonnage Copper Grades Reserve Category Ore Type Copper (kt) (%CuT) (%CuS) (%CuCN) (kt) For personal use only BROC 39,456 0.58 0.41 0.08 227.5 CRIS 17,607 0.42 0.30 0.04 73.8 Proved Mineral WAD 17,242 0.26 0.14 0.05 44.8 Mineral Reserves are reported as constrained within M
Slide 48: Marimaca Copper – Commitment to Sustainability
Marimaca Copper – Commitment to Sustainability Health, Safety and Security Constructive Stakeholder The health, safety and wellbeing of our Engagement employees is at the forefront of For personal use only We value the trust and support from our everything we do. We implement the local stakeholders.
Slide 49: For personal use only
For personal use only CHILE’S NEW COPPER DISCOVERY Advancing Development With District Scale Potential CHILE’S NEW COPPER DISCOVERY Advancing Development With District Scale Potential