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  1. 1. April 2022 Analyst Site Visit MCSA Mining Complex & Boa Esperança
  2. 2. Caution Regarding Forward Looking Information and Statements This presentation contains “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities legislation (collectively, “forward-looking statements”). Forward-looking statements include statements that use forward-looking terminology such as “may”, “could”, “would”, “will”, “should”, “intend”, “target”, “plan”, “expect”, “budget”, “estimate”, “forecast”, “schedule”, “anticipate”, “believe”, “continue”, “potential”, “view” or the negative or grammatical variation thereof or other variations thereof or comparable terminology. Forward-looking statements include, but are not limited to, statements with respect to the Company's guidance and/or outlook on future production, costs and capital expenditures; development plans, costs, timelines and/or approvals for, as well as benefits, production and/or performance expected by, growth projects including development of the Deepening Extension Zone, construction of the new external shaft, and creation of a two-mine system at the Pilar Mine, the potential benefit of Project Honeypot at the Pilar Mine, construction of the Boa Esperança mine, development of the Matinha Vein at the NX Gold Mine, expansion of the Caraíba Mill, and other infrastructure projects at the MCSA Complex; the Company’s expectations, strategies and plans for the MCSA Mining Complex, the NX Gold Property and the Boa Esperança Property, including, but not limited to, the Company’s planned exploration, development and production activities; and the significance and timing of any particular exploration program or result and the Company’s expectations for current and future exploration plans including, but not limited to, planned areas of additional exploration, further extensions and expansion of mineralization at the MCSA Mining Complex, the NX Gold Mine and the Boa Esperança Project. Forward-looking statements are not a guarantee of future performance and are based upon a number of estimates and assumptions of management in light of management's experience and perception of trends, current conditions and expected developments, as well as other factors that management believes to be relevant and reasonable in the circumstances, as of the date of this presentation including, without limitation, assumptions about: continued effectiveness of the measures taken by the Company to mitigate the possible impact of COVID-19 on its workforce and operations; favourable equity and debt capital markets; the ability to raise any necessary additional capital on reasonable terms to advance the production, development and exploration of the Company's properties and assets; future prices of copper and other metal prices; the timing and results of exploration and drilling programs; the accuracy of any mineral reserve and mineral resource estimates; the geology of the MCSA Mining Complex, NX Gold Property and the Boa Esperança Property being as described in the technical reports for these properties; production costs; the accuracy of budgeted exploration and development costs and expenditures; the price of other commodities such as fuel; future currency exchange rates and interest rates; operating conditions being favourable such that the Company is able to operate in a safe, efficient and effective manner; work force conditions to remain healthy in the face of prevailing epidemics, pandemics or other health risks (including COVID-19), political and regulatory stability; the receipt of governmental, regulatory and third party approvals, licenses and permits on favourable terms; obtaining required renewals for existing approvals, licenses and permits on favourable terms; requirements under applicable laws; sustained labour stability; stability in financial and capital goods markets; availability of equipment and critical supplies, spare parts and consumables; positive relations with local groups and the Company's ability to meet its obligations under its agreements with such groups; and satisfying the terms and conditions of the Company's current loan arrangements. While the Company considers these assumptions to be reasonable, the assumptions are inherently subject to significant business, social, economic, political, regulatory, competitive, global health, and other risks and uncertainties, contingencies and other factors that could cause actual actions, events, conditions, results, performance or achievements to be materially different from those projected in the forward-looking statements. Many assumptions are based on factors and events that are not within the control of the Company and there is no assurance they will prove to be correct.Furthermore, such forward-looking statements involve a variety of known and unknown risks, uncertainties and other factors which may cause the actual plans, intentions, activities, results, performance or achievements of the Company to be materially different from any future plans, intentions, activities, results, performance or achievements expressed or implied by such forward-looking statements. Such risks include, without limitation, the risk factors listed under the heading “Risk Factors” in the Annual Information Form of the Company for the year ended December 31, 2021, dated March 11, 2022 (the “AIF”). Although the Company has attempted to identify important factors that could cause actual actions, events, conditions, results, performance or achievements to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events, conditions, results, performance or achievements to differ from those anticipated, estimated or intended. The Company cautions that the foregoing lists of important assumptions and factors are not exhaustive. Other events or circumstances could cause actual results to differ materially from those estimated or projected and expressed in, or implied by, the forward-looking statement contained herein. There can be no assurance that forward-looking statement will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statement. Accordingly, readers should not place undue reliance on forward-looking statement. Forward-looking statements contained herein are made as of the date of this presentation and the Company disclaims any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or results or otherwise, except as and to the extent required by applicable securities laws. This presentation may also contain future-oriented financial information (“FOFI”) and information which could be considered to be in the nature of a “financial outlook”. Such FOFI or financial outlook was approved by management of the Company as of the date of presentation for the purpose of providing management’s reasonable estimate of what return investors might expect to earn based on the assumptions set forth in such estimates and the information may not be appropriate for other purposes. Management cautions that such FOFI or financial outlook reflects the Company’s current beliefs and are based on information currently available to the Company and on assumptions the Company believes are reasonable. Actual results and developments may differ materially from results and developments discussed in the FOFI or financial outlook as they are subject to a number of significant risks and uncertainties. Certain of these risks and uncertainties are beyond the Company’s control. Consequently, all of the FOFI or financial outlook are qualified by these cautionary statements, and there can be no assurances. Cautionary Notes Regarding Mineral Resource and Mineral Reserve Estimates In accordance with applicable Canadian securities regulatory requirements, all mineral reserve and mineral resource estimates of the Company disclosed in this presentation have been prepared in accordance with NI 43-101 and are classified in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") Definition Standards for Mineral Resources and Mineral Reserves, adopted by the CIM Council on May 10, 2014 (the "CIM Standards"). NI 43-101 is a rule developed by the Canadian Securities Administrators that establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects. NI 43-101 differs significantly from the disclosure requirements of the Securities and Exchange Commission (the "SEC") generally applicable to U.S. companies. For example, the terms "mineral reserve", "proven mineral reserve", "probable mineral reserve", "mineral resource", "measured mineral resource", "indicated mineral resource" and "inferred mineral resource" are defined in NI 43-101. These definitions differ from the definitions in the disclosure requirements promulgated by the SEC. Accordingly, information contained in this presentation may not be comparable to similar information made public by U.S. companies reporting pursuant to SEC disclosure requirements. Mineral resources which are not mineral reserves do not have demonstrated economic viability. Pursuant to the CIM Standards, mineral resources have a higher degree of uncertainty than mineral reserves as to their existence as well as their economic and legal feasibility. Inferred mineral resources, when compared with measured or indicated mineral resources, have the least certainty as to their existence, and it cannot be assumed that all or any part of an inferred mineral resource will be upgraded to an indicated or measured mineral resource as a result of continued exploration. Pursuant to NI 43-101, inferred mineral resources may not form the basis of any economic analysis. Accordingly, readers are cautioned not to assume that all or any part of a mineral resource exists, will ever be converted into a mineral reserve, or is or will ever be economically or legally mineable or recovered. Cautionary Statements | Busine s s Over v i e w ERO COPPER | 2
  3. 3. General Scientific and technical information contained in this presentation has been reviewed, verified and approved by Emerson Ricardo Re, MSc, MBA, MAusIMM (CP) (No. 305892), Registered Member (No. 0138) (Chilean Mining Commission) and Resource Manager of the Company. Mr. Re is an employee of Ero and Qualified Person as defined by NI 43-101. Information of a scientific or technical nature in respect of the MCSA Mining Complex included in this presentation is based on the press release dated January 6, 2022, and where applicable, the technical report dated January 14, 2021 with an effective date of October 1, 2020 entitled “2020 Updated Mineral Resources and Mineral Reserves Statements of Mineração Caraíba's Vale do Curaçá Mineral Assets, Curaçá Valley”, prepared by Porfirio Cabaleiro Rodrigues, MAIG, Bernardo Horta de Cerqueira Viana, MAIG, Paulo Roberto Bergmann, FAusIMM, Fábio Valério Câmara Xavier, MAIG and Dr. Augusto Ferreira Mendonça, RM SME all of GE21 Consultoria Mineral Ltda. (“GE21”) and Dr. Beck (Alizeibek) Nader, FAIG of BNA Mining Solutions (“BNA”), who are independent qualified persons under NI 43-101 (the “2020 MCSA Technical Report”), and where applicable, the technical report dated October 17, 2018 with an effective date of August 1, 2018 entitled “2018 Updated Mineral Resources and Mineral Reserves Statements of Mineração Caraíba's Vale do Curaçá Mineral Assets, Curaçá Valley”, prepared by Rubens Jose De Mendonça, MAusIMM, of Planminas – Projectos e Consultoria em Mineração Ltd. and Porfirio Cabaleiro Rodrigues, MAIG, Fábio Valério Cãmara Xavier, MAIG, and Bernardo Horta de Cerqueira Viana, MAIG, all of GE21, who are independent qualified persons under NI 43-101 (the “2018 MCSA Technical Report”). Information of a scientific or technical nature in respect of the NX Gold Mine included in this presentation is based on the press release dated January 6, 2022, and where applicable, the technical report, dated January 8, 2021 with an effective date of September 30, 2020, entitled “Mineral Resource and Reserve Estimate of the NX Gold Mine, Nova Xavantina”, prepared by Porfírio Cabaleiro Rodriguez, MAIG, Bernardo Horta Cerqueira Viana, MAIG, Paulo Roberto Begmann, FAusIMM and Leonardo de Moraes Soares, MAIG, all of GE21, who are independent qualified persons under NI 43-101 (the “2020 NX Gold Mine Technical Report”). Information of a scientific or technical nature in respect of the Boa Esperança Property included in this presentation is based on the technical report dated November 12, 2021 with an effective date of August 31, 2021, entitled “Boa Esperança Project NI 43-101 Technical Report on Feasibility Study Update”, prepared by Kevin Murray, P. Eng., Erin L. Patterson, P. Eng., and Scott C. Elfen, P.E., all of Ausenco Engineering Canada Inc., Carlos Guzmán, FAusIMM RM CMC of NCL Ingeniería y Construcción SpA, who are independent qualified persons under NI 43-101, and Emerson Ricardo Re, MSc, MBA, MAusIMM (CP) (No. 305892), Registered Member (No. 0138) (Chilean Mining Commission) and Resource Manager of the Company (the “Boa Esperança Technical Report”). Please see the AIF, 2020 MCSA Technical Report, 2018 MCSA Technical Report (on SEDAR only), the 2020 NX Gold Mine Technical Report, and the Boa Esperança Technical Report, each filed on the Company’s profile at www.sedar.com and www.sec.gov, for details regarding the data verification undertaken with respect to the scientific and technical information included in this presentation regarding the MCSA Mining Complex, the NX Gold Mine and the Boa Esperança Property, for additional details regarding the related exploration information, including interpretations, the QA/QC employed, sample, analytical and testing results and for additional details regarding the mineral resource and mineral reserve estimates disclosed herein. Where applicable, exploration target projection(s) are shown to demonstrate future area of exploration focus within the Company’s operations. These projections are based on data compilation work which includes review of geological controls, structural analysis and copper mineralization identified during the Company’s technical programs. The interpretation and boundary limits do not imply continuity of mineralization, or actual thickness of mineralization which has yet to be defined. Third Party Information This presentation includes market, industry and economic data which was obtained from various publicly available sources and other sources believed by the Company to be true. Although the Company believes it to be reliable, the Company has not independently verified any of the data from third party sources referred to in this presentation, or analyzed or verified the underlying reports relied upon or referred to by such sources, or ascertained the underlying economic and other assumptions relied upon by such sources. The Company believes that its market, industry and economic data is accurate and that its estimates and assumptions are reasonable, but there can be no assurance as to the accuracy or completeness thereof. The accuracy and completeness of the market, industry and economic data used throughout this presentation are not guaranteed and the Company does not make any representation as to the accuracy or completeness of such information. Non-IFRS Measures Financial results of the Company are prepared in accordance with IFRS. The Company and MCSA utilize certain non-IFRS measures, including C1 cash cost of copper produced per pound, C1 cash costs of gold produced per ounce, EBITDA and working capital as more particularly described in the Company's MD&A for the three and nine months ended September 30, 2021, a copy of which can be found on the Company's website, on SEDAR and on EDGAR. The Company believes that these measures, together with measures determined in accordance with IFRS, provide investors with an improved ability to evaluate the underlying performance of the Company, the MCSA Mining Complex and the NX Gold Mine. Non-IFRS measures do not have any standardized meaning prescribed under IFRS, and therefore they may not be comparable to similar measures employed by other companies. The data is intended to provide additional information and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with IFRS. C1 cash cost of copper produced (per lb) is the sum of production costs, net of capital expenditure development costs and by-product credits, divided by the copper pounds produced. C1 cash cost reported by the Company include treatment, refining charges, offsite costs, and certain tax credits relating to sales invoiced to the Company's Brazilian customer on sales. C1 cash cost of copper produced per pound is a non-IFRS measure used by the Company to manage and evaluate operating performance of the Company’s operating mining unit and is widely reported in the mining industry as benchmarks for performance but does not have a standardized meaning and is disclosed in addition to IFRS measures. C1 cash cost of gold produced (per ounce) is the sum of production costs, net of capital expenditure development costs and silver by-product credits, divided by the gold ounces produced. C1 cash cost of gold produced per ounce is a non-IFRS measure used by the Company to manage and evaluate operating performance of the Company's operating mining unit and is widely reported in the mining industry as benchmarks for performance but does not have a standardized meaning and is disclosed in addition to IFRS measures. Disclaimer ERO COPPER | 3
  4. 4. Topics of Discussion  Company Overview and Strategy  Health, Safety & Environment  MCSA Mining Complex  A Track Record of Value Creation  Pursuit of High-Return Growth Opportunities  Boa Esperança Project  Update on Workstreams  Gap Zone and Other Value Creation Opportunities  NX Gold Mine  Balance Sheet and Financial Overview ERO COPPER | 4
  5. 5. 1 1 High Quality Portfolio in Eco-Friendly Jurisdiction Business Overview 2 Strong Track Record Driven by ROIC Focus 2 4 Peer-Leading Organic Growth with Low Capital Intensity 3 5 Balance Sheet Strength Adds Resiliency 4 6 Aligned Management Team with Meaningful Equity Position 5 ERO COPPER | 5
  6. 6. 20 kt 46 kt 97 kt 2017A 2021A 2025E MCSA Boa NX Gold Mine Production MCSA Mining Complex Production Boa Esperanҫa Development Project Brazil-Focused Clean Copper Producer With Meaningful Gold Production Strong Exploration Focus Driving Organic Growth 1. Source: FactSet Research Systems as of March 21, 2022. Based on last twelve months as of December 31, 2021. 2. Estimated production based on midpoint of production guidance ranges. Industry-Leading Returns 62% LTM Return on Invested Capital (“ROIC”)(1) Doubling Copper Production Every 4 Years(2) High-Growth Clean Copper Producer ERO COPPER | 6
  7. 7. ERO COPPER | 7 NX Gold Mine Production MCSA Mining Complex Production Boa Esperanҫa Mine in Development (expected construction start in Q2 2022) 1 2 3 Note: C1 Cash Cost of Copper Produced, C1 Cash Cost of Gold Produced, and AISC of Gold Produced are non-IFRS measures. 2. Estimated production and unit costs based on Please refer to the appendix for a discussion and reconciliation on non-IFRS measures. 1. Estimated production and unit costs based on 5-year guidance ranges as published on January 11, 2022. the Boa Esperança Technical Report. Economics use a copper price forecast of $3.80/lb in 2024, $3.95/lb in 2025 and $3.40/lb in 2026 and thereafter, and a BRL:USD exchange rate of 5.00. 2 1 3 45-50kt Cu 5-Year Forecasted Annual Production(1) $1.12/lb Wtd. Avg. 5-Year Forecasted C1 Cash Cost(1) Bahia Mato Grosso Pará ~35kt Cu Avg. Annual Production in First 5 Years(2) $1.12/lb Avg. C1 Cash Cost in First 5 Years(2) 50-60koz Au 5-Year Forecasted Annual Production(1) $513/oz Wtd. Avg. 5-Year Forecasted C1 Cash Cost(1) 2022 Analyst Tour Brazil-Focused Clean Copper Producer
  8. 8. 1. MCSA mine plan based on the technical report entitled “2017 Updated Mineral Resources and Mineral Reserves Statements of based on the technical report entitled “Feasibility Study Technical Report for the Boa Esperança Copper Project, Pará State, Brazil Mineração Caraíba’s Vale do Curaçá Mineral Assets, Curaçá Valley” dated September 7, 2017 with an effective date of June 1, 2017. Boa Esperança mine plan ” dated September 7, 2017 with an effective date of June 1, 2017. MCSA Mining Complex  Remaining 8-year mine life based on average annual production of 23,000 tonnes  12+ year mine life with production averaging ~46,000 tonnes per year from 2022-2026 NX Gold Mine  No reserve life and ~25,000 ounces of gold production in 2017  6-year mine life with production averaging ~53,000 ounces per year from 2022-2026 Boa Esperança  9-year mine life based on total life-of-mine copper production of 163,000 tonnes  12-year mine life with life-of-mine copper production totaling 326,000 tonnes Exploration Strategy  Continuity of operations  Annual budget of ~$1M under prior owners  Support growth of high-margin production  Discover and define high-return deposits  Success-based exploration budget of $40M+ ERO COPPER | 8 2017(1) Today Track record of delivery on production growth and mine life extensions – over US$500M re-invested in business to date Execution of Strategy since 2017
  9. 9. 2021: $0.77 2017: $1.45 ($0.50) $0.00 $0.50 $1.00 $1.50 $2.00 $2.50 $3.00 $3.50 $4.00 - 10,000 20,000 30,000 40,000 C1 Cash Costs (US$/lb Cu) Global Annual Copper Production (M lbs) 20 30 42 43 46 2017 2018 2019 2020 2021 Copper Production (kt) ERO COPPER | 9 Significant copper production growth… …at peer-leading operating costs ~47% Reduction Execution of key projects, operational excellence and innovation are key themes in Ero’s growth story Note: Global copper cost curve sourced from Wood Mackenzie as of Q3 2021. C1 Cash Cost of Copper Produced is a non-IFRS measure. Please refer to the section entitled “Non-IFRS Measures” in the Company’s MD&A dated March 8, 2022 and the MD&A dated March 28, 2018 for reconciliation of C1 Cash Costs for 2021 and 2017, respectively. Operational Achievements
  10. 10.  “NX 60” Initiative, including Matinha Vein production  ~25% excess mill capacity still to be utilized  Robust exploration program focused on extensions of Matinha Vein and regional targets Ero’s organic growth initiatives are driven by its core principles of pursuing high ROIC, low capital intensity projects High ROIC, Low Capital Intensity Organic Growth MCSA Mining Complex  “Pilar 3.0” Initiative, including Deepening Extension  ~25% of excess mill capacity still to be utilized  Aggressive exploration across Curaçá Valley NX Gold Mine Boa Esperança Project  Exploration of the Gap Zone  Cornerstone position in emerging Carajás copper belt Executing on Attractive Growth Pipeline ERO COPPER | 10
  11. 11. ERO COPPER | 11 100 98 99 165 214 198 $0.77 $1.10 $1.10 $1.10 $1.00 $1.05 0 50 100 150 200 250 -0.25 0.25 0.75 1.25 1.75 2.25 2.75 3.25 3.75 4.25 4.75 2021A 2022E 2023E 2024E 2025E 2026E Copper Production (M lb) C1 Cash Cost ($/lb) Spot Copper ($4.50/lb) $4.50/lb At a realized copper price of $4.50/lb, Ero expects to have an operating margin of $3.50/lb on more than 200 million pounds of copper production in 2025 Note: C1 Cash Cost is a non-IFRS measures. 2022-2025 figures based on midpoint of guidance ranges for copper production and C1 cash costs. Outlook assumes contributions from the Boa Esperança Mine, where construction is expected to commence in Q2 2022. Ero’s peer-leading organic growth profile, combined with first quartile C1 cash costs, is expected to generate significant EBITDA Copper Production (M lb) Executing on Attractive Growth Pipeline
  12. 12. MCSA Mining Complex Boa Esperanҫa NX Gold Mine Broader Brazil Near-Term Medium-Term & Long-Term Gap Zone Exploration Boa Extensions (incl. Underground) Carajás District Strategic Opportunities New Regional Systems (i.e. Arapuá) In-Mine Exploration Near-Mine Exploration Regional Exploration Nickel, PGM Focused Exploration Program Pilar Upper Levels incl. Honeypot (Exploration & Engineering) Past Producing Mines (Lagoa da Mina & Surubim District) Vermelhos Mine High-Grade Extensions Pilar Mine Deepening Extension Growth Vermelhos District Expansion Strategy Matinha Vein Extensions Santo Antonio Vein Extensions New Regional Discoveries New Strategic Opportunities ERO COPPER | 12 Robust pipeline of high-return growth projects under development Growth Initiatives
  13. 13. ERO COPPER | 13  Management focused on creation of shareholder value through exploration  Globally, over 70 geologists across the Company’s exploration team  Currently 34 drill rigs active across the portfolio $28 $10 $6 $5 2022 Exploration Budget ($ million)(1) MCSA NX Gold Boa Esperança Strategic 1. 2022 exploration budget based on midpoint of guidance ranges. 2022 Exploration Objectives:  MCSA  Addition of high-grade tonnes in the upper levels of the Pilar Mine  Increase mine life at Vermelhos to 10+ years, improve grade profile  Continue systematic testing of high-priority regional targets focusing on high-grade zones  NX Gold  Increase reserve life to 10+ years at NX Gold  Aggressive regional exploration program in partnership with Royal Gold (17,500m planned for 2022)  Boa Esperança  Incorporate results of ‘Gap Zone’ drill program into mine planning  Test extensions of mineralization beyond pit limits Growth Initiatives: Exploration in Focus
  14. 14. Ero’s recently completed $400M sr. unsecured notes offering provides ample liquidity to fund organic growth  Pro forma liquidity position of $555M  $480M in cash  $75M in revolver availability  Bond call feature allows for early repayment should metal prices remain strong  8-year maturity mitigates risks related to potential metal price volatility Strong Balance Sheet Metrics ($M) 31-Dec-21 Pro Forma Cash & Cash Equivalents $130 $480 Credit Facility Utilization Total Commitments $150 $75 (-) Current Borrowings ($50) - Credit Facility Availability $100 $75 Total Liquidity $230 $555 Total Debt $59 $409 Net Debt ($71) ($71) LTM EBITDA $332 $332 Total Debt Leverage Ratio 0.2x 1.4x Net Debt Leverage Ratio (0.2x) (0.2x) Well-Positioned to Fund Growth ERO COPPER | 14
  15. 15. Placeholder | Placeholder P l a c e h o l d e r HEALTH, SAFETY & SUSTAINABILITY ERO COPPER | 15
  16. 16. “Brazil’s electricity matrix is one of the cleanest in the world and Brazil is committed to continuing its support for renewable energy projects.” - International Trade Administration, U.S. Dept. of Commerce Share of Electricity Production from Renewables, 2021 Sources: Our World in Data based on BP Statistical Review of World Energy & Ember (2022); U.S. Energy Information Administration as of September 7, 2021. Note: Renewables includes electricity production from hydropower, solar, wind, biomass and waste, geothermal, wave and tidal sources.  Home to 3 of the world’s 10 largest hydroelectric power dams  South America’s largest wind farm, located in northeastern Brazil, started operations in mid- 2021  85% of total power generation capacity from renewable sources  66% from hydropower  11% from wind and solar  8% from biomass Brazil’s Leadership in Renewable Energy ERO COPPER | 16
  17. 17.  Extensive mitigation measures implemented during Q1 2020 remain ongoing  Over 99% of our workforce in Brazil is vaccinated against COVID-19  No significant impact on operations, supply chains or sales channels Safety Performance COVID-19 Response  Our commitment to the health and safety of our workforce is paramount to our business strategy  Ero’s Lost Time Incident Frequency Rate is amongst the lowest of copper producers in recent years  Health and safety audits are conducted regularly as part of our program for zero accidents (“PAZ”) Tailings Management  The MCSA Mining Complex uses co-disposal for tailings, eliminating the need for conventional tailings dam storage  Frequent third-party audits of our tailings storage facilities as well as internal monitoring of tailings pipelines  Dry-stack tailings is currently planned for Boa Esperanҫa ERO COPPER | 17 Health & Safety
  18. 18. ERO COPPER | 18  In addition to medical supplies and technical support, food scarcity was identified as a potential threat to our communities  Company prepared and delivered baskets throughout the COVID-19 pandemic  Program commenced in 2020 and ran through the end of 2021 Contributing to our communities throughout COVID-19 Over 19,000+ food baskets donated during the duration of the program Health & Safety Contributions
  19. 19. ERO COPPER | 19 Project Vision Partnership to develop one of the region’s leading point-of-care facilities serving up to an estimated ~70,000 people in northern Bahia  Phase 1: currently underway (expected completion Q2 2022) Multi-year renovation totaling ~US$4.0 million Phase 1: Urgent Care / Emergency / COVID-19 & Technical Support Phase 2: Outpatient, Treatment & Exams / Labs Phase 3: Hospitalization & Admin Phase 4: Infrastructure & Support Health & Safety Contributions (cont.)
  20. 20. ERO COPPER | 20 Implementation of co-disposal/ filtered tailings deposition across all Company assets Implementing global best practices for tailings management  No active conventional tailings dam  Recovery of process water  Substrate for native revegetation  Company endeavors to meet or exceed international standards in addition to Brazilian legislative requirements MCSA Mining Complex NX Gold Mine Environmental Stewardship
  21. 21. Source: ISS, Sustainalytics, TCFD Renewable Energy  In excess of 90% of Ero’s electricity is provided by renewable energy including hydro, wind and solar Clean Water to Local Communities  MCSA owns and operates an 86-kilometer water pipeline from the São Francisco River  Deliver in excess of 7 million cubic meters of water annual to the local communities surrounding the MCSA Mining Complex ISS QualityScore ESG Rating  Currently ranked in the top 40th percentile within the mining sub-industry by ISS on Governance, Environmental and Social Sustainalytics ESG Risk Rating  Currently ranked in the 20th percentile within the diversified metals mining subindustry Progressing Towards TCFD Alignment  Internal Climate Change Committee focused on aligning the Company with the Task Force on Climate-Related Financial Disclosures by 2024 ERO COPPER | 21 Additional ESG Highlights
  22. 22. Placeholder | Placeholder P l a c e h o l d e r MCSA MINING COMPLEX ERO COPPER | 22
  23. 23. Established Infrastructure ERO COPPER | 23
  24. 24. 80.0 82.0 84.0 86.0 88.0 90.0 92.0 94.0 96.0 0.8 1.3 1.8 2.3 2.8 3.3 Metallurgical Recovery (%) Feed Grade (% Cu) CMC & HIG Mill Operational (June 2021 -Present) 2018 Baseline 5% - 6% increase in metallurgical recoveries across grade profiles compared to original guidance of 3% - 4% improvement Metallurgical Recoveries Post Concentrator Optimization (2018 vs. June 2021-Present)  Completed on time, on budget – total cost of ~US$11 million  CMC reagent addition project and high-intensity grinding (“HIG”) mill installation  Significant improvement in metallurgical recoveries across grade profiles and various ore types Recently completed concentrator upgrade projects delivering better than expected outcomes Executed Projects: Concentrator Optimization ERO COPPER | 24
  25. 25. 12 14 16 18 20 22 24 26 28 30 32 34 36 -0775L -0795L -0835L -0855L -0875L -0890L -0930L -0960L -0990L -1020L -1040L Wet Bulb Temperature (°C) 6 MWr 15 MWr 15 Megawatts of installed cooling sufficient to maintain temperatures throughout Pilar Mine below 27°C Working Face Wet Bulb Temperature (Recorded at Mine Level, Degrees Celsius) Phase 1 (completed Q4 2021) Phase 2 (handover in April 2022) Recently completed Cooling Project will result in improved operating efficiencies of underground mine  Completed on time, on budget – total cost of ~US$20 million for complete project  Project designed to support current and future extension of operations at depth  Lower temperature environment throughout the mine allows evaluation of potential to move to 3 shift system vs. 4 shifts (first trial is currently underway) Executed Projects: Cooling Phase I & II ERO COPPER | 25
  26. 26.  Meaningful additions in upper levels of Pilar Mine and Deepening Extension  Extended ~800m to depth N +100 m -300 m -700 m -1100 m -1500 m Plan View 300 Meters 150 MSBS Deepening Extension P1P2 400 Meters 200 ERO COPPER | 26 Total Mineralized Envelope (2021) Existing Infrastructure Total Mineralized Envelope (2018) New External Shaft 472 729 36 225 2018 2021 Measured & Indicated Resource Inferred Resource 24.8 Mt @ 1.90% Cu 1.8 Mt @ 2.07% Cu 45.1 Mt @ 1.62% Cu 15.2 Mt @ 1.48% Cu Pilar Mine Resource Growth(1,2) (Underground Mine Contained Cu, kt) 1. 2018 Measured & Indicated Resources and 2018 Inferred Resources based on the 2018 MCSA Technical Report. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the Company’s press release dated January 6, 2022. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for MCSA Mining Complex. 2. 2018 Measured Resource comprised of 15.6 Mt @ 1.92% Cu and 2018 Indicated Resources comprised of 9.3 Mt @ 1.85% Cu. 2021 Measured Resource comprised of 22.8 Mt @ 1.63% Cu and 2021 Indicated Resources comprised of 22.3 Mt @ 1.60% Cu. Executed Projects: Pilar Exploration Aggressive exploration within the Pilar Mine has resulted in significant extensions of known mineralization since 2018
  27. 27. 8 217 9 130 2018 2021 Indicated Resource Inferred Resource 1.2 Mt @ 0.62% Cu 0.3 Mt @ 2.60% Cu 10.4 Mt @ 2.08% Cu 6.1 Mt @ 2.14% Cu ERO COPPER | 27 N Deepening Extension  Focus since 2018 on growing resources and reserves in the “Deepening Extension”  Zone currently measures ~500m x 500m x 20m  Remains open with intercepts prior to year-end including some of the best copper intercepts published globally Level -965 Deepening Extension Resource Growth(1) (Underground Mine Contained Cu, kt) 1. 2018 Measured & Indicated Resources and 2018 Inferred Resources based on the 2018 MCSA Technical Report. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the Company’s press release dated January 6, 2022. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for MCSA Mining Complex. 2. Previous Highlight Cu Intercepts released are from press releases dated July 7, 2021 and October 14, 2021. Please refer to these press releases for additional information. (2) Executed Projects: Deepening Extension
  28. 28. ERO COPPER | 28  Creation of two mine system, allowing sustained production volumes of ~3.0 million tonnes of ore per annum from Pilar  Supported by significant investments in cooling, paste fill plant and new larger diameter external shaft  Shaft construction commenced in Q3 2021 Phase I & II Cooling Plant (construction photo December 2021)  Pilar Mine commenced open pit operations in 1979  Underground operations commenced in 1986, now in operation for ~36 years  “Pilar 3.0” initiative commenced 2022 Growth Projects: The New Pilar Mine “3.0” Actively investing for the next several decades of operations…
  29. 29. ERO COPPER | 29 Existing Development Planned Development View looking Northeast 0m 400m 200m Investment in a new external shaft to support growth of the Pilar Mine well into the future, providing foundation for “Pilar 3.0”  Construction commenced Q3 2021, expected completion in Q4 2025  Project remains on schedule and on budget – total shaft sinking cost of ~US$190 million  Additional estimated EPCM cost of ~US$17 million and contingency of ~US$18 million distributed over capital spend period  Improved efficiencies related to increased material movement (ore + waste) and shortened personnel transport times Note: Capex spend based on average USD:BRL foreign exchange rate of 5.00 Growth Projects: Pilar Mine External Shaft
  30. 30. Increase in process capacity to 4.2 Mtpa through the installation of a third ball mill; optimization of the flotation circuit through the addition of a Jameson Cell  Total project cost of ~US$23 million including crushing, milling, flotation and filtration upgrades  Ball mill ordered with commissioning expected in Q2 2023  Jameson Cell and crusher upgrades to be ordered imminently Growth Projects: Mill Expansion to 4.2 Mtpa ERO COPPER | 30
  31. 31. 2022 2023 2024 2025 2026 Production Plan Pilar Mine Tonnes (kt) 1,800 2,200 2,700 2,600 3,000 Grade (% Cu) 1.50% 1.30% 1.25% 1.25% 1.30% Vermelhos Mine Tonnes (kt) 900 850 850 950 800 Grade (% Cu) 2.05% 1.75% 1.25% 1.15% 1.30% Surubim Tonnes (kt) 300 550 550 600 500 Grade (% Cu) 0.75% 0.65% 0.75% 0.75% 1.10% Processing Operations Caraíba Mill Tonnes (kt) 3,000 3,700 4,200 4,200 4,200 Grade (% Cu) 1.60% 1.35% 1.20% 1.20% 1.25% Recovery Rate 92.5% 92.5% 92.5% 92.5% 92.5% Recovered Copper (t) 43,000 - 46,000 43,000 - 47,000 45,000 - 50,000 45,000 - 50,000 47,000 - 52,000 Five-year outlook represents a base case, with several growth initiatives underway to potentially increase copper grades and production Five-Year Outlook ERO COPPER | 31
  32. 32. Placeholder | Placeholder P l a c e h o l d e r MCSA MINING COMPLEX: GROWTH OPPORTUNITIES ERO COPPER | 32
  33. 33. 1. Source: SNL Capital IQ as of August 25, 2021. Copper drill intercepts since August 2018 at operating copper mines. ERO COPPER | 33 - 100 200 300 400 500 600 700 MCSA Other Top Cu Producer Drill Intercepts (Last 3 Years) – Cu Grade x Meter (1) < 67.0m @ 9.21% Cu ~30% of the top 50 active copper mine drill intercepts over the past three years are from the MCSA Mining Complex Exceptional asset quality, highlighted by industry-leading exploration results on a grade x meter basis World-Class Exploration Results
  34. 34. ERO COPPER | 34 • Put slide between pilar and vermelhos showing what we’ve learned from Pilar and suggesting that it applies to Vermelhos Existing Infrastructure Total Mineralized Envelope (2021)(1) All Copper Assays >6% Cu Interpreted Structures N  Geometries of both Pilar and Vermelhos indicate a steeply- plunging long axis of the deposits  Mafic/ultramafic intrusions are generally in the form of lenses and occur along structures, fold limbs and within fold hinges  Thick high-grade deposits commonly located within fold hinges / structural traps 1. 2021 Mineralized Envelope based on the Company’s press release dated January 6, 2022. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for MCSA Mining Complex. Long Section (Looking East) ? ? Pilar: Refining Structural Controls Understanding structural controls opens the window for the discovery of additional mineralization within, and adjacent to, existing mine infrastructure
  35. 35. N FC5196 FC47183 FC47187 FC48193 FC48195 32.0m at 1.51% Cu FC5195 38.2m at 2.48% Cu E FC5195 FC5196 FC47183 FC47187 FC48193 FC48195 Level Mine - 90  Fold hinges are repeated at depth in the Pilar Mine  The recurrence of these traps suggests a potentially important structural control on high- grade mineralization in the Pilar Mine and throughout the Curaçá Valley ERO COPPER | 35 +460 m Level Mine -90 +460 m Inferred Resource 2021 Existing Infrastructure Measured/Indicated Resource 2021 New Cu Intercepts 200 Meters 100 Structural trap being targeted in 2022 1. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the Company’s press release dated January 6, 2022. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for MCSA Mining Complex. 2. Please refer to the Appendix of this presentation for complete assay results. Long Section (Looking East) Cross Section (Looking North) 42.8m at 1.82% Cu Pilar: Upper-Level Opportunities Interpretation of Pilar Mine upper-level drill core from late 2021 suggests a fold hinge is a ‘trap’ for high-grade copper mineralization
  36. 36. “Project Honeypot” initiative has significant value potential in areas not mined during late 1990s due to undercapitalized nature of operations at the time ERO COPPER | 36 1. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the Company’s press release dated January 6, 2022. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for MCSA Mining Complex. 2. Please refer to the Appendix of this presentation for complete assay results. N +100 m -300 m -700 m -1100 m -1500 m Plan View 300 Meters 150 MSBS Deepening Extension P1P2 400 Meters 200 Total Mineralized Envelope (2021) Existing Infrastructure Total Mineralized Envelope (2018) New External Shaft  Based on success of Phase 1, expanded initiative commenced in 2022  Scope: review all areas of the Pilar Mine previously thought to be mined Honeypot Phase 2 Project Honeypot, Phase 2 Area  Paste-fill plant upgrades and implementation of new mining methods facilitated engineering initiative in early 2021 to review and develop mine plans to recover stopes, rib and sill pillars previously not mined  First stope, RC03, from this review is expected to be mined in Q2 2022 (~130kt grading ~4.00% Cu) Honeypot Phase 1 Pilar: Upper-Level Opportunities RC03
  37. 37. 1. 2018 Measured & Indicated Resources and 2018 Inferred Resources based on the 2018 MCSA Technical Report. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the Company’s press release dated January 6, 2022. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for MCSA Mining Complex. 2. 2018 Measured Resource comprised of 3.0 Mt @ 4.12% Cu and 2018 Indicated Resources comprised of 1.5 Mt @ 1.97% Cu. 2021 Measured Resource comprised of 4.4 Mt @ 2.14% Cu and 2021 Indicated Resources comprised of 11.6 Mt @ 1.01% Cu. ERO COPPER | 37 Total Mineralized Envelope (2021) Existing Infrastructure Total Mineralized Envelope (2018) +300 m 000 m -300 m N 500 Meters 250 N7-N8 Sombrero & Toboggan East Zone Siriema 500 Meters 250 Plan View 500 Meters 250  Improved understanding of control on high-grade mineralization through underground mapping  Active drill programs within the Vermelhos Mine targeting  High-grade extensions at depth  East Zone Conduit  N7-N8 Connection Interpreted Structures 155 212 24 151 2018 2021 Measured & Indicated Resource Inferred Resource 4.6 Mt @ 3.40% Cu 2.0 Mt @ 1.19% Cu 16.0 Mt @ 1.32% Cu 17.1 Mt @ 0.88% Cu Vermelhos Mine Resource Growth(1,2) (Underground Mine Contained Cu, kt) Long Section (Looking East) Vermelhos: Exploration Success
  38. 38. ERO COPPER | 38 Inferred Resource 2021 Existing Infrastructure Measured/Indicated Resource 2021 Previously Announced Cu Intercept(2) New Cu Intercept W Interpreted Structural Trap 2. Previously announced Cu intercept from the Company’s press release dated June 20, 2019. 1. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the Company’s press release dated January 6, 2022. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for MCSA Mining Complex. Cross-Section (Looking North) Fold axis Foliation FVS-1152 mineralized interval from 71.4m down hole - Northing: 8970842m, Easting: 396514m  Drilling beneath Toboggan and Sombrero continues to intercept high-grade zones following enhanced structural understanding  Ongoing drilling to further test extent of identified structural traps  Using Pilar Mine as analogue to define and identify controlling features Vermelhos: In-Mine Opportunities
  39. 39. ERO COPPER | 39 1. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the Company’s press release dated January 6, 2022. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for MCSA Mining Complex. 2. District total includes Siriema Underground mineral resources in addition to Vermelhos Mine.  Geological endowment warrants evaluation of potential for stand- alone processing facility to service the northern Curaçá Valley  Internal scoping studies underway, no definitive timeline set 500 Meters 250 500 Meters 250 Total Mineralized Envelope (2021) Existing Infrastructure Total Mineralized Envelope (2018) Vermelhos District, Plan View Significant extension of mineralization identified through exploration since 2018 – district remains open Vermelhos District, 2021(1) Tonnage Grade Contained Cu (kt) (% Cu) (kt) Underground(2) Measured 4,401 2.14% 94 Indicated 12,056 1.01% 121 Measured & Indicated 16,457 1.31% 216 Inferred 19,126 0.92% 175 Open Pit Measured 7,552 0.54% 41 Indicated 16,672 0.56% 93 Measured & Indicated 24,223 0.55% 134 Inferred 1,063 0.57% 6 Vermelhos District Total Measured 11,953 1.13% 135 Indicated 28,727 0.75% 214 Measured & Indicated 40,680 0.86% 350 Inferred 20,189 0.90% 182 Vermelhos: District Opportunities
  40. 40. ERO COPPER | 40 Exploration Sector Size (km x km) Individual Targets Paraíso 14 x 5 3 Vermelhos 20 x 8 20 Cacimba da Torre 13 x 10 4 Barro Vermelho 20 x 10 8 Angicos 33 x 3 12 Surubim 15 x 8 17 Pirulito 33 x 2 3 Sertãozinho 17 x 3 7 Arapuá 38 x 4 18 Gêmeos 19 x 5 5 Bela Vista 10 x 6 1 Santa Fé 42 x 4 2 Caraíba 8 x 10 2 Total 102  In 2018:  56 original target areas  Current Status (2022):  102 total individual targets  36 top priority targets  13 tested / 23 remain to be tested  6 regional targets have returned promising results  4 previously announced discoveries  2 new mineralized systems of interest Regional: Work to Date
  41. 41. ERO COPPER | 41 FS17-01: 39.4m @ 0.59% Cu from 38.4m to 77.7m down hole Northing: 8921097m Easting: 394718m Azimuth: 270° Dip: -48° Cu Anomalies (ppm) S8 S7 FS17-01 FS10-04: 35.0m @ 0.56% Cu from 88.0m to 123.0m down hole Northing: 8908254m Easting: 402599m Azimuth: 90° Dip: -56° FS10-04 Arapuá Strike length of ~55km 1. Drill holes were drilled from surface. The length of intercept may not represent the true width of mineralization. From, To and Length are rounded to the nearest tenth of a meter. S17 System S10 System Pilar Mine 82.8 – 108.6 (X + 2s- 2nd Order Anomaly) 108.6 – 2,630.1 (X + 3s - 1st Order Anomaly) Actively exploring within the Arapuá Exploration Sector, which extends over 55km in strike length (including new S17 system) Regional: Advancing New Mineralized Systems
  42. 42. Placeholder | Placeholder P l a c e h o l d e r ERO COPPER | 42 • Add image 3-D OVERVIEW: MCSA MINING COMPLEX
  43. 43. Placeholder | Placeholder P l a c e h o l d e r BOA ESPERANÇA ERO COPPER | 43
  44. 44. 1. The occurrence of significant mineral deposits and prospects throughout the Carajás Mineral District does not imply continuity of mineralization for the Boa Esperança Project beyond that which has been defined. Please refer to the Boa Esperança Technical Report for additional technical and scientific information. Foothold in Prolific Carajás District ERO COPPER | 44
  45. 45. 1. Based on consensus copper prices price forecast used in the Boa Esperança Technical Report dated November 12, 2021 with an effective date of August 31, 2021. Copper prices of $3.80/lb in 2024, $3.95/lb in 2025 and $3.40/lb in 2026 and thereafter, and a BRL:USD exchange rate of 5.00. 2. The occurrence of significant mineral deposits and prospects throughout the Carajás Mineral District does not imply continuity of mineralization for the Boa Esperança Project beyond that which has been defined. Please refer to the Boa Esperança Technical Report for additional technical and scientific information. …Driven by low-strip, high-grades and location $294M Development Capital(1) 1.4-Year Payback Period(1) Low Capital-Intensity, High-Return Project 41.8% IRR On an After-Tax Basis(1) $380M NPV On an After-Tax Basis(1) ~35kt Cu Annual Production in First 5 Years(1) $1.12/lb Avg. C1 Cash Costs in First 5 Years(1) ~27kt Cu Avg. Annual LOM Production (1) $1.36/lb Avg. LOM C1 Cash Costs(1) Open Pit Mine Plan(1) 12-Year Initial Mine Life(1) Construction of Boa is expected to commence in Q2 2022 following the recent approval by Ero Copper’s board of directors Building on Organic Growth Track Record ERO COPPER | 45
  46. 46. The Boa Esperança Technical Report assumes a consensus copper price forecast resulting in $3.80/lb in 2024, $3.95/lb in 2025 and a LT copper price (2026+) of $3.40/lb. Sensitivity charts above include incremental +/- 10% sensitivities to the 2024 and 2025 copper price assumptions. Please refer to the Boa Esperança Technical Report for additional technical and scientific information. ERO COPPER | 46 Project economics are stronger in the current market backdrop than in Feasibility Study base case – $100 $200 $300 $400 $500 $600 $700 (20.0%) (10.0%) -- 10.0% 20.0% Copper Price (+/-%) Head Grade (+/-%) Operating Cost (+/-%) Initial Capital (+/-%) FX (+/-%) -- 10.0% 20.0% 30.0% 40.0% 50.0% 60.0% 70.0% (20.0%) (10.0%) -- 10.0% 20.0% Copper Price (+/-%) Head Grade (+/-%) Operating Cost (+/-%) Initial Capital (+/-%) FX (+/-%) Post-Tax NPV8% Sensitivity ($M) Post-Tax IRR Sensitivity (%) Base Case Assumptions: $3.40/lb LT Copper Price $294M Initial Capital $1.36/lb Avg. LOM C1 Cash Costs 5.00 BRL:USD 0.83% Cu LOM Head Grade Strong Economics in Current Market
  47. 47. ERO COPPER | 47 2022 Exploration Objectives:  Support engineering team with geotechnical, geometallurgical and condemnation drilling  Further drill testing of the “Gap Zone”  First pass wide-spaced drill testing for near-surface targets and high-grade “underground” extensions of Boa  Initiate regional exploration program at Boa  Commence drilling on option properties $4.8 $1.2 $1.0 2022 Exploration Budget ($ million) Exploration Condemnation Strategic (Soma)  Drilling efforts to date focused on improving quality of data for engineering purposes and testing of the Gap Zone In addition to near-mine activities, Ero is actively developing a hub- and-spoke model for Boa New Tucumã Properties Option Agreement (with Soma Gold Corp.)1 Located ~20km East of the Boa Esperança Project Option to acquire 100% interest in properties for ~US$8M in phased payments and exploration expenditures 1. Refer to Soma Gold Corp. press release dated March 15, 2022 for additional information Exploration Objectives for 2022
  48. 48. ERO COPPER | 48 BSPD-169* 9241175m N 450159m E 9242243m N 451223m E BSPD-170* 200 Meters 100 BSPD-171 BSPD-172* BSPD-173* BSPD-174* BSPD-182* BSPD-183* BSPD-192 BSPD-176* BSPD-177 BSPD-179* BSPD-185* BSPD-186 BSPD-190* BSPD-208 BSPD-175* BSPD-169 BSPD-190 BSPD-175 BSPD-176 BSPD-192 BSPD-171 BSPD-208 BSPD-186 BSPD-170 BSPD-185 BSPD-174 BSPD-182 +300 m 000 m 100 Meters 50 NW BSPD-172 BSPD-173 BSPD-177 BSPD-179 BSPD-183 Measured and Indicated Resource 2021 New Cu Intercepts Inferred Resource 2021 17.2m at 1.87% Cu 12.6m at 1.30% Cu 37.3m at 1.22% Cu 49.6m at 1.15% Cu 155.7m at 1.09% Cu Underground Potential (Open to Depth) 1. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the 2021 Boa Esperança Technical Report. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for the Boa Esperança Project. 2. Please refer to the Appendix of this presentation for complete assay results. Cross Section (Looking Northeast) Plan View *Refer to appendix for full drill results Continue to extend known limits of mineralization at the Boa Esperança Project, including within the Gap Zone Gap Zone: New Drill Results
  49. 49. ERO COPPER | 49 2022 2023 2024 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Board Approval Early Works & Road Upgrades Detailed Engineering & Support Testwork RFP / RFQs Out for Tender EPC / EPCM Packages Ground-Breaking Site Construction Commissioning & Start-up  Construction timeline of ~22 months  Project execution strategy on track  Recently executed critical-path power transmission line contract  Key contracts out for tender and currently in process of securing long lead time equipment  Expect final suite of engineering, procurement construction and management contracts to be awarded in early Q3 Development Milestones
  50. 50. Placeholder | Placeholder P l a c e h o l d e r ERO COPPER | 50 • Add image 3-D OVERVIEW: BOA ESPERANÇA
  51. 51. Placeholder | Placeholder P l a c e h o l d e r NX GOLD MINE ERO COPPER | 51
  52. 52. ERO COPPER | 52  Ore is processed at the adjacent Nova Xavantina Mill using a conventional, three-stage crush, flotation and CIL circuit  Current mine life to 2026 with significant growth opportunity driven by a highly prospective land package and underutilized mill  Large land position (~117,000ha)  Shear-hosted quartz vein gold deposit  Recent discoveries of Santo Antonio Vein (2018) and new Matinha Vein (2021) suggest high potential for additional discoveries  Approximately 25% excess mill capacity NX Gold: Overview The NX Gold Mine is a high-grade, low-cost gold mine and processing facility located in Mato Grosso State, Brazil
  53. 53. 400 Meters 250 8382950m N 340292m E 8381322m N 338371m E MAT43 MAT37 MAT34 MAT33 MAT30 MAT31 SA104A SA104B SA108 Mine Level -215 ERO COPPER | 53 Plan View Cross Section (Looking South) E 400 Meters 250 SA108 SA104A SA104B MAT33 MAT43 MAT34 MAT31 MAT30 MAT37 +200 m -200 m 2.8m at 6.97gpt 3.8m at 19.27gpt 6.5m at 19.74gpt 0.9m at 2.58gpt 6.8m at 2.43gpt 2.5m at 5.66gpt 4.8m at 5.91gpt 3.5m at 7.06gpt 2.9m at 59.06gpt Inferred Resource 2021 Existing Infrastructure Indicated Resource 2021 Previously Mined New Gold Intercepts 1. 2021 Measured & Indicated Resources and 2021 Inferred Resources based on the 2021 NX Gold Mine Technical Report. Please refer to the Appendix for additional information of a scientific or technical nature in respect of the 2021 Mineral Resources for the NX Gold Mine. 2. Please refer to the Appendix of this presentation for complete assay results. Recent exploration results continue to demonstrate Matinha and Santo Antonio Veins remain open NX Gold: Recent Drill Results
  54. 54. Placeholder | Placeholder P l a c e h o l d e r ERO COPPER | 54 3-D OVERVIEW: NX GOLD MINE
  55. 55. Placeholder | Placeholder P l a c e h o l d e r GUIDANCE & OPERATIONAL OUTLOOK ERO COPPER | 55
  56. 56. Note: Cash cost, AISC and capex guidance assume a USD:BRL foreign exchange rate of 5.303 MCSA Mining Complex Boa Esperança NX Gold Mine Production 43.0 - 46.0 kt Cu Construction Phase 39.0 - 42.0 koz Au Operating Costs $1.05 - $1.15 / lb Cu C1 Cash Cost Construction Phase $500 - $600 / oz Au C1 Cash Cost $925 - $1,025 / oz Au All-In Sustaining Cost Capital Expenditures (Excluding Exploration) $205 - $230 M $70 - $80 M $16 - $19 M Exploration $25 - $30 M $5 - $6 M $9 - $10 M 2022 Guidance ERO COPPER | 56
  57. 57. ERO COPPER | 57 45 45 75 97 90 $1.10 $1.10 $1.10 $1.00 $1.05 2022E 2023E 2024E 2025E 2026E MCSA Boa C1 Cash Costs ($/lb) Copper Production (kt) and C1 Cash Costs(1) 41 53 58 58 58 $550 $525 $500 $500 $500 2022E 2023E 2024E 2025E 2026E NX Gold C1 Cash Costs ($/oz) Gold Production (koz) and C1 Cash Costs(1) Capital Expenditures by Asset ($M)(1,2) Capital Expenditures by Type ($M)(1,2) $353 $335 $203 $136 $121 2022E 2023E 2024E 2025E 2026E MCSA Boa NX Gold $353 $335 $203 $136 $121 2022E 2023E 2024E 2025E 2026E Growth Sustaining Exploration Note: C1 Cash Cost is a non-IFRS measures. 1. Based on midpoint of guidance ranges for copper production, copper C1 cash costs, capital expenditures by asset, gold production, gold C1 cash costs, and capital expenditures by type. Outlook assumes contributions from the Boa Esperança Mine. Construction of the Boa Esperança Project is expected to commence in Q2 2022. 2. Future capital expenditure guidance depends on success of exploration success. Five-Year Outlook
  58. 58. A P P E N D I X ERO COPPER | 58
  59. 59. Christopher Noel Dunn Executive Chairman & Director • Co-founder of Ero Copper • 25 years in investment banking industry, primarily with Goldman Sachs managing a capital underwriting business in London David Strang CEO & Director • Co-founder of Ero Copper • Previously held senior executive roles with all of the Lumina Group companies including as Director, CEO and President of Lumina Copper, Lumina Royalty, Global Copper and Lumina Resources Makko DeFilippo President • Appointed President in Jan. 2021; previously VP, Corporate Development • Previously Director, Corporate Finance with FTI Consulting’s Global Mining Advisory Practice Anthea Bath COO • Appointed COO in Jan. 2021; previously VP, Technical Services • Previously VP, Commercial Services with Sibanye Gold Wayne Drier CFO • 20 years of corporate finance and capital markets experience within the global mining sector Mike Richard CGO • 25 years of mining industry experience specializing in discovery, evaluation and development of Cu, Zn, polymetallic and gold deposits • Previously Director of Exploration and New Business, Latin America with Lundin Mining Eduardo De Come CEO of Ero Brazil • Served as CFO of MCSA from 2013 to February 2022 • 30 years of experience in finance management • Spent the last 15 years working for companies in the commodities sector Leadership Team ERO COPPER | 59
  60. 60. Christopher Noel Dunn Executive Chairman and Director Please see Mr. Dunn’s biography under Leadership on the previous slide. David Strang President, CEO and Director Please see Mr. Strang’s biography under Leadership on the previous slide. Lyle Braaten Director Mr. Braaten is the President and Chief Executive Officer of Miedzi Copper. He is currently Vice President, Legal and a director of Lumina Gold Corp. Mr. Braaten joined the Lumina Group in 2008 and assisted in the creation of Magma Energy, a renewable energy company focused on international geothermal energy development. In 2011, Magma and Plutonic Power merged to create Alterra Power Corp. In 2018, Alterra was acquired by Innergex Renewable Energy for $1.1B. Mr. Braaten is a former director of Anfield Gold Corp and Lumina Royalty Corp. and currently a director of Luminex Resources. Mr. Braaten received a law degree from the University of British Columbia in 1989 and a Bachelor of Science from the University of Calgary in 1986. Mr. Braaten is a member of the Law Societies of British Columbia and the Yukon. Steven Busby Director Mr. Busby is the Chief Operating Officer of Pan American Silver with over 30 years of experience in the mining industry. As Chief Operating Officer, he is responsible for Pan American’s operations, projects, safety, and corporate social responsibility within a large multi mine organization. Mr. Busby previously held positions in a privately owned consulting firm, Coeur d’Alene Mines, Amax Gold, Meridian/FMC Gold, and Nerco Minerals. Mr. Busby holds a Bachelor of Science degree in Mineral Processing Engineering and is a member of the Montana Tech Metallurgical Engineering Department Advisory Board. Mr. Busby is a former director of Anfield Gold. Dr. Sally Eyre Director Dr. Eyre is a mining finance professional with extensive experience in global resource capital markets and mining operations. Dr. Eyre holds three non-executive directorships: Adventus Mining Corporation, Equinox Gold Corporation and Centamin plc. During 2011 to 2014 she served as President and Chief Executive Officer of Copper North Mining and prior to Copper North Mining served as Senior Vice President, Operations at Endeavour Mining. Dr. Eyre served as President and Chief Executive Officer of Etruscan Resources Inc. (now Endeavour Mining Corp.). She served as Director of Business Development for Endeavour Financial Ltd. and has held executive positions with a number of Canadian resource companies. Dr. Eyre has a Ph.D. in Economic Geology from the Royal School of Mines, Imperial College, London. Dr. Eyre is a member of the Society of Economic Geologists (SEG); a member of the Institute of Corporate Directors; and a former Director of the SEG Canada Foundation. Ms. Eyre is the Chair of the Nominating and Corporate Governance Committee. Robert Getz Director Robert Getz is a private investor and brings over 30 years of experience in public and private investments and international mergers and acquisitions. Mr. Getz currently serves as Managing Partner of Pecksland Capital Partners, a private investment and advisory firm. Mr. Getz previously served as a Founder and Managing Director of Cornerstone Equity Investors. Mr. Getz has served as a Director of numerous companies, including metals and mining companies. He currently serves as a Director of Haynes International, Inc. Mr. Getz previously served as Chairman of the Board of Crocodile Gold Corp., prior to the company’s merger with Newmarket Gold in July 2015 and subsequently served as a Director of Newmarket Gold Inc. until May 2016. Mr. Getz holds a Bachelor of Arts, cum laude, from Boston University, and a Master of Business Administration in Finance from the Stern School at New York University. Mr. Getz is the Chair of the Compensation Committee. Chantal Gosselin Director Ms. Gosselin brings over 25 years of combined experience in the mining industry and capital markets. Her exposure to the financial markets is extensive; she recently held positions as Vice President and Portfolio Manager at Goodman Investment Counsel and Senior Mining Analyst at Sun Valley Gold LLP, along with various analyst positions earlier in her career. Ms. Gosselin has also held various mine-site management positions in Canada, Peru and Nicaragua, giving her firsthand experience in underground mine development and production. Ms. Gosselin holds a Masters of Business Administration from Concordia University and a Bachelor of Science (Mining Engineering) from Laval University and has completed the Institute of Corporate Director program. She currently serves on the boards of a variety of TSX-listed companies in the natural resource sectors. Ms. Gosselin is the Chair of the Environmental, Health, Safety and Sustainability Committee. John Wright Director Mr. Wright is a Metallurgical Engineer with over 35 years of experience in the mining industry. He has been providing business development services to Capstone Mining Corp. since December 2006. Mr. Wright was a co-founder, former President, Chief Operating Officer and director of Pan American Silver. Mr. Wright was also the co- founder of Equinox Resources. Mr. Wright is a former director of Lumina Copper, Northern Peru Copper and Global Copper. He is a director of SilverCrest Metals and Luminex Resources. He is a Member of the Canadian Institute of Mining and Metallurgy and has a P.Eng. designation from the Association of Professional Engineers and Geoscientists of British Columbia. Matthew Wubs Director Mr. Wubs is the Co-CEO of Westland Insurance Group, one of the largest private insurance brokerage operations in Canada. Westland directly manages over $700 million in premium volume through its brokerage, insurance company and wholesale operations. Mr. Wubs is responsible for oversight of insurance, reinsurance, risk management, finance and M&A. He joined Westland in the role of Controller in 1997. Previous to Westland, he held a consulting role in Management Information Systems at International Forest Products Ltd. and also obtained his Chartered Professional Accountant designation while working at Deloitte LLP. Mr. Wubs is the Chair of the Audit Committee and designated Financial Expert. Board of Directors ERO COPPER | 60
  61. 61. Type of Operation Open Pit Mine Life (years) 12 Initial Capital ($M) $294 Mill Throughput (Mtpa) 4.0 First Five Years of Production Average Annual Recovered Cu (kt) 35 C1 Cash Cost ($/lb. recovered Cu) $1.12 Life-of-Mine Averages Average Annual Recovered Cu (kt) 27 C1 Cash Cost ($/lb. recovered Cu) $1.36 Life-of-Mine Summary Total Tonnes Milled (kt) 43,052 Copper Head Grade 0.83% Recovery Rate 91.3% Total Recovered Copper (kt) 326 After-Tax NPV (8%) ($M) $380 After-Tax IRR 41.8% After-Tax Payback Period (years) 1.4 Note: Please refer to the Company’s press release dated September 28, 2021 for additional information. Boa figures assume a consensus copper price forecast of $3.80/lb in 2024, $3.95/lb in 2025 and $3.40/lb in 2026 and thereafter, and a BRL:USD exchange rate of 5.00. Operating and capital costs for Boa are 2021 estimates. Comparable project capital and operating costs reflect estimates completed between 2017 and 2020. Boa 2021 Feasibility Study Highlights  Life-of-mine recovered copper production doubled to 326 kt compared to 2017 Study  Significantly higher annual copper production compared to the 2017 Study  Fast payback driven by near-surface, high-grade production in early years Results of Ero’s 2021 Optimization Efforts 27 49 40 28 30 26 17 20 23 23 28 14 Year 1 Year 2 Year 3 Year 4 Year 5 Year 6 Year 7 Year 8 Year 9 Year 10 Year 11 Year 12 Life-of-Mine Production Plan Based on 2021 Study (Recovered Copper in kt) Targeting higher production in Years 6+ through ongoing Gap Zone exploration Boa Esperança Feasibility Study ERO COPPER | 61
  62. 62. Post-Tax NPV Sensitivity To Opex Post-Tax IRR Sensitivity To Opex LT Copper Price (US$/lb) LT Copper Price (US$/lb) Opex $2.72 $3.06 $3.40 $3.74 $4.08 Opex $2.72 $3.06 $3.40 $3.74 $4.08 (20.0%) $211 $334 $457 $580 $703 (20.0%) 28.1% 37.4% 45.8% 53.6% 60.9% (10.0%) $172 $295 $418 $541 $664 (10.0%) 25.3% 35.1% 43.8% 51.8% 59.3% -- $133 $257 $380 $503 $626 -- 22.3% 32.7% 41.8% 50.0% 57.6% 10.0% $93 $218 $341 $464 $587 10.0% 18.8% 30.1% 39.6% 48.1% 55.9% 20.0% $50 $179 $303 $426 $549 20.0% 14.6% 27.4% 37.3% 46.1% 54.1% Post-Tax NPV Sensitivity To Initial Capex Post-Tax IRR Sensitivity To Initial Capex LT Copper Price (US$/lb) LT Copper Price (US$/lb) Initial Capex $2.72 $3.06 $3.40 $3.74 $4.08 Initial Capex $2.72 $3.06 $3.40 $3.74 $4.08 (20.0%) $181 $304 $427 $550 $673 (20.0%) 31.9% 43.6% 53.9% 63.2% 71.9% (10.0%) $157 $280 $403 $526 $649 (10.0%) 26.6% 37.6% 47.2% 56.0% 64.1% -- $133 $257 $380 $503 $626 -- 22.3% 32.7% 41.8% 50.0% 57.6% 10.0% $110 $233 $356 $479 $602 10.0% 18.8% 28.6% 37.1% 44.9% 52.1% 20.0% $86 $209 $332 $455 $578 20.0% 15.7% 25.1% 33.2% 40.6% 47.4% Post-Tax NPV Sensitivity To FX Post-Tax IRR Sensitivity To FX LT Copper Price (US$/lb) LT Copper Price (US$/lb) Head Grade $2.72 $3.06 $3.40 $3.74 $4.08 Head Grade $2.72 $3.06 $3.40 $3.74 $4.08 (20.0%) $116 $237 $357 $478 $598 (20.0%) 20.7% 31.1% 40.2% 48.4% 56.0% (10.0%) $125 $247 $368 $490 $612 (10.0%) 21.5% 31.9% 41.0% 49.2% 56.8% -- $133 $257 $380 $503 $626 -- 22.3% 32.7% 41.8% 50.0% 57.6% 10.0% $142 $267 $391 $515 $639 10.0% 23.1% 33.5% 42.5% 50.8% 58.4% 20.0% $151 $276 $402 $527 $653 20.0% 23.9% 34.2% 43.3% 51.6% 59.2% Post-Tax NPV Sensitivity To FX Post-Tax IRR Sensitivity To FX LT Copper Price (US$/lb) LT Copper Price (US$/lb) FX ($R:$US) $2.72 $3.06 $3.40 $3.74 $4.08 FX ($R:$US) $2.72 $3.06 $3.40 $3.74 $4.08 4.00 ($69) $63 $191 $314 $437 4.00 0.0% 14.1% 24.1% 32.3% 39.6% 4.50 $45 $173 $296 $419 $542 4.50 12.9% 24.3% 33.5% 41.6% 49.0% 5.00 $133 $257 $380 $503 $626 5.00 22.3% 32.7% 41.8% 50.0% 57.6% 5.50 $202 $325 $448 $571 $694 5.50 30.0% 40.2% 49.3% 57.7% 65.6% 6.00 $260 $383 $506 $629 $752 6.00 36.8% 47.1% 56.4% 65.0% 73.1% The Boa Esperança Technical Report assumes a consensus copper price forecast resulting in $3.80/lb in 2024, $3.95/lb in 2025 and a LT copper price (2026+) of $3.40/lb. Sensitivity tables above include incremental +/- 10% sensitivities to the 2024 and 2025 copper price assumptions. Please refer to the Boa Esperança Technical Report for additional technical and scientific information. ERO COPPER | 62 Boa Esperança: Project Economics Sensitivities
  63. 63. 1. NSI indicates no significant intercept based on a three meter mining width and cut-off grade of 0.51% copper. Drill holes were drilled from level -30 and level +130 in the Pilar Mine. The length of intercept may not represent the true width of mineralization. Values may not add up due to rounding. From, to and mineralized intercepts are rounded to the nearest tenth of a meter. ERO COPPER | 63 Hole ID From (m) To (m) Length (m) Cu (%) FC47183 4.2 7.2 3.0 1.78 and 36.9 46.3 9.3 1.28 and 50.5 92.4 41.9 1.54 includi ng 67.0 80.0 13.0 3.96 FC47187 4.0 9.3 5.3 1.91 and 41.3 54.0 12.7 1.06 and 133.5 137.5 4.0 0.86 FC48193 15.5 18.7 3.1 0.94 and 25.2 31.3 6.1 1.93 and 35.9 67.9 32.0 1.51 includin g 54.9 57.9 3.0 3.54 and 74.9 77.9 3.0 0.91 FC48195 6.0 9.0 3.0 1.52 and 14.0 17.0 3.0 0.98 and 24.6 39.6 15.0 1.40 includin g 30.6 33.6 3.0 2.09 and 47.6 53.6 6.0 1.16 and 95.2 100.9 5.7 1.28 Hole ID From (m) To (m) Length (m) Cu (%) FC5195 93.0 131.2 38.2 2.48 includin g 99.0 111.2 12.2 3.60 and 185.5 198.7 13.2 1.61 includin g 194.7 199.5 4.9 2.12 and 220.2 227.2 6.9 1.38 and 236.2 244.6 8.4 1.16 FC5196 53.7 59.2 5.5 1.67 and 70.0 112.8 42.8 1.82 includin g 98.8 103.8 5.0 3.30 and 183.2 220.2 36.9 1.35 includin g 200.2 206.2 6.0 2.41 and 228.6 243.9 15.3 1.04 includin g 240.6 243.9 3.3 2.03 MCSA: New Exploration Results – P1P2
  64. 64. 1. NSI indicates no significant intercept, based on a three meter mining width and a cut-off grade of 0.18% copper for regional exploration programs to demonstrate geological controls, irrespective of depth. Drill holes were drilled from surface. Holes not included are either pending assay results or have been included in a different section of this presentation. The length of intercept may not represent the true width of mineralization. Values may not add up due to rounding. From, To and Length are rounded to the nearest tenth of a meter. ERO COPPER | 64 Hole ID From (m) To (m) Length (m) Cu (%) S10 West CRS10-13 13.0 28.0 15.0 0.25 and 33.0 43.0 10.0 0.30 CRS10-14 8.0 36.0 28.0 0.42 CRS10-15 1.0 35.0 34.0 0.45 CRS10-16 77.0 131.0 54.0 0.50 includin g 96.0 100.0 4.0 0.97 and 189.0 199.0 10.0 0.23 FS10-04 87.7 133.5 45.8 0.47 includin g 100.7 113.7 13.0 0.70 and 148.9 152.9 4.0 0.32 and 181.9 200.4 18.5 0.32 FS10-05 84.7 100.6 15.9 0.34 FS10-06 205.8 240.5 34.7 0.35 and 273.2 277.2 4.0 0.70 Hole ID From (m) To (m) Length (m) Cu (%) S10 West (cont’d) FS10-07 148.0 156.3 8.3 0.72 includin g 153.0 156.3 3.3 1.11 FS10-08 178.9 189.5 10.7 0.50 and 203.8 208.1 4.3 0.53 and 212.8 221.0 8.1 0.70 FS10-09 174.3 199.7 25.3 0.41 FS10-10 NSI NSI NSI NSI FS10-11 77.7 82.1 4.4 0.54 FS10-12 23.1 34.9 11.8 0.48 FS10-13 110.3 158.1 47.8 0.39 FS10-14 10.4 37.0 26.6 0.50 includin g 23.6 32.2 8.6 0.70 FS10-15 268.7 298.1 29.4 0.46 includin g 316.6 336.9 20.3 0.4 FS10-18 NSI NSI NSI NSI FS10-21 NSI NSI NSI NSI MCSA: New Exploration Results – S10
  65. 65. 1. NSI indicates no significant intercept, based on a three meter mining width and a cut-off grade of 0.18% copper for regional exploration programs to demonstrate geological controls, irrespective of depth. Drill holes were drilled from surface. Holes not included are either pending assay results or have been included in a different section of this presentation. The length of intercept may not represent the true width of mineralization. Values may not add up due to rounding. From, To and Length are rounded to the nearest tenth of a meter. ERO COPPER | 65 Hole ID From (m) To (m) Length (m) Cu (%) S10 East CRS10-04 0.0 7.0 7.0 0.21 CRS10-06 73.0 78.0 5.0 0.44 and 134.0 137.0 3.0 0.58 CRS10-07 146.0 156.0 10.0 0.40 CRS10-08 53.0 60.0 7.0 0.29 and 65.0 80.0 15.0 0.26 CRS10-10 NSI NSI NSI NSI CRS10-11 55.0 77.0 22.0 0.33 includin g 69.0 74.0 5.0 0.66 and 123.0 138.0 15.0 0.21 CRS10-12 137.0 142.0 5.0 0.30 CRS10-17 67.0 87.0 20.0 0.27 includin g 81.0 86.0 5.0 0.50 CRS10-18 98.0 102.0 4.0 0.31 CRS10-19 48.0 66.0 18.0 0.20 and 83.0 87.0 4.0 0.25 CRS10-20 NSI NSI NSI NSI FS10-16 NSI NSI NSI NSI FS10-17 NSI NSI NSI NSI Hole ID From (m) To (m) Length (m) Cu (%) S10 East (cont’d) FS10-19 163.8 172.8 9.0 0.27 and 187.7 190.9 3.2 0.27 S10 South CRS10-37 102.0 109.0 7.0 0.35 CRS10-38 81.0 85.0 4.0 0.27 CRS10-39 92.0 102.0 10.0 0.33 CRS10-40 NSI NSI NSI NSI CRS10-41 NSI NSI NSI NSI CRS10-42 NSI NSI NSI NSI CRS10-43 50.0 73.0 23.0 0.42 FS10-20 57.6 96.6 39.0 0.37 FS10-22 59.5 84.5 25.0 0.47 FS10-23 NSI NSI NSI NSI FS10-24 211.4 216.1 4.7 0.30 FS10-25 64.1 75.1 11.0 0.43 FS10-26 56.7 85.6 28.8 0.35 FS10-27 59.4 62.6 3.2 0.25 and 187.8 199.8 12.0 0.31 FS10-28 NSI NSI NSI NSI FS10-29 NSI NSI NSI NSI MCSA: New Exploration Results – S10
  66. 66. Note: Mineral resources shown inclusive of mineral reserves. Mineral resources that are not mineral reserves do not have demonstrated economic viability. Please refer to Additional Information section of this presentation for relevant technical and scientific information. ERO COPPER | 66 Category Tonnage (kt) Grade (% Cu) Contained Cu (kt) Underground Proven 9,177 1.49% 137 Probable 20,797 1.42% 296 Proven & Probable Reserves 29,974 1.44% 432 Measured 30,355 1.63% 494 Indicated 39,005 1.33% 520 Measured & Indicated Resources 69,360 1.46% 1,014 Inferred Resources 40,331 1.14% 458 Open Pit Proven 15,680 0.59% 92 Probable 13,627 0.61% 83 Proven & Probable Reserves 29,306 0.60% 175 Measured 16,777 0.61% 103 Indicated 18,563 0.56% 105 Measured & Indicated Resources 35,340 0.59% 208 Inferred Resources 3,000 0.50% 15 Total Proven 24,857 0.92% 229 Probable 34,423 1.10% 378 Proven & Probable Reserves 59,280 1.02% 607 Measured 47,132 1.27% 597 Indicated 57,568 1.08% 624 Measured & Indicated Resources 104,700 1.17% 1,221 Inferred Resources 43,331 1.09% 473 MCSA: Reserves & Resources
  67. 67. 1. Mineralized intercepts below cut-off grade of 0.20% copper not reported. Drill holes were drilled from surface using diamond core drill rigs. The length of the intercept may not represent the true width of mineralization. Values may not add up due to rounding. From, to and mineralized intercepts are rounded to the nearest tenth of a meter. ERO COPPER | 67 Hole ID From (m) To (m) Length (m) Cu (%) BSPD-170 42.7 54.7 12.0 0.22 and 68.5 76.0 7.5 0.26 and 85.0 89.5 4.5 0.33 and 107.5 116.5 9.0 0.24 and 260.6 265.1 4.5 0.39 and 324.1 350.4 26.3 0.53 includi ng 342.2 346.8 4.6 1.34 BSPD-171 59.3 215.0 155.7 1.09 includin g 118.4 130.7 12.3 2.06 also includin g 204.1 207.8 3.7 3.63 BSPD-172 31.0 43.0 12.0 0.29 and 48.7 79.9 31.2 1.01 includin g 59.8 62.9 3.1 3.79 and 118.5 120.3 1.8 1.13 BSPD-173 16.5 20.2 3.7 0.21 and 28.5 38.0 9.5 0.23 and 44.5 50.3 5.8 2.27 includin g 47.4 49.6 2.2 5.18 and 60.0 67.0 7.0 0.23 and 79.9 121.0 41.1 0.58 includin g 109.0 118.5 9.5 0.88 and 307.5 318.1 10.6 0.48 and 345.8 349.5 3.7 0.67 Hole ID From (m) To (m) Length (m) Cu (%) BSPD-174 57.0 79.0 22.0 0.60 includin g 65.4 67.4 2.1 1.87 BSPD-176 35.5 78.3 42.8 0.31 and 119.2 132.7 13.5 0.35 and 137.9 144.1 6.2 0.43 and 201.1 204.4 3.3 0.43 and 394.5 398.0 3.5 0.96 and 403.5 410.5 7.0 0.83 and 419.0 426.5 7.5 0.73 BSPD-177 45.0 48.0 3.0 0.25 and 65.0 77.0 12.0 0.50 and 84.9 88.8 3.9 0.40 includin g 100.3 103.6 3.3 2.76 and 112.7 162.0 49.3 1.06 includin g 125.0 130.9 5.9 2.12 and 171.5 221.1 49.6 1.15 includin g 195.9 206.6 10.7 2.13 and 227.4 231.5 4.2 1.10 and 256.0 259.0 3.0 0.75 and 264.0 267.0 3.0 0.65 and 270.0 278.5 8.5 0.89 and 314.7 318.3 3.6 0.84 Boa Esperança: New Exploration Results
  68. 68. 1. Mineralized intercepts below cut-off grade of 0.20% copper not reported. Drill holes were drilled from surface using diamond core drill rigs. The length of the intercept may not represent the true width of mineralization. Values may not add up due to rounding. From, to and mineralized intercepts are rounded to the nearest tenth of a meter. ERO COPPER | 68 Hole ID From (m) To (m) Length (m) Cu (%) BSPD-179 49.3 85.0 35.7 0.45 includin g 51.8 55.6 3.8 1.28 and 89.5 94.7 5.2 0.24 and 137.6 140.5 2.9 0.75 and 155.8 158.5 2.6 1.74 and 215.7 238.8 23.1 0.51 includin g 230.2 237.8 7.7 0.83 and 258.1 262.1 4.0 0.84 and 318.0 342.6 24.6 0.80 includin g 318.0 323.0 5.0 2.37 BSPD-182 14.0 20.0 6.0 1.18 and 31.0 34.5 3.5 0.46 and 39.5 47.0 7.5 0.36 and 59.5 77.0 17.5 0.25 and 90.7 146.0 55.4 0.55 includin g 110.7 125.0 14.3 1.17 also includin g 110.7 114.1 3.4 3.42 and 161.4 180.3 18.9 0.43 and 188.0 210.5 22.5 0.35 and 256.0 259.1 3.1 1.09 Hole ID From (m) To (m) Length (m) Cu (%) BSPD-183 9.5 18.5 9.0 0.92 and 22.5 26.6 4.1 0.53 and 46.5 52.8 6.3 0.31 and 58.5 70.5 12.0 0.66 and 96.5 112.8 16.3 0.61 includin g 97.8 101.0 3.3 1.66 and 119.6 128.6 9.0 0.23 and 162.0 168.0 6.0 0.29 and 172.5 179.0 6.5 0.23 and 204.3 207.5 3.2 0.54 BSPD-185 15.0 43.5 28.5 0.56 includi ng 28.5 38.0 9.5 1.11 and 81.2 85.0 3.8 0.29 and 105.5 119.0 13.6 0.53 and 136.7 186.5 49.9 0.39 and 190.0 193.5 3.4 0.38 and 196.1 202.0 5.9 0.85 and 213.2 236.4 23.2 0.55 includin g 230.4 235.0 4.6 1.25 and 243.0 253.0 10.0 0.41 Boa Esperança: New Exploration Results
  69. 69. 1. Mineralized intercepts below cut-off grade of 0.20% copper not reported. Drill holes were drilled from surface using diamond core drill rigs. The length of the intercept may not represent the true width of mineralization. Values may not add up due to rounding. From, to and mineralized intercepts are rounded to the nearest tenth of a meter. ERO COPPER | 69 Hole ID From (m) To (m) Length (m) Cu (%) BSPD-186 118.6 123.8 5.3 1.10 and 173.9 177.0 3.1 0.37 and 248.0 252.0 4.0 1.60 and 270.6 273.2 2.6 2.53 and 312.0 349.3 37.3 1.22 includin g 313.5 319.2 5.6 2.80 BSPD-190 151.0 154.2 3.2 0.47 and 223.3 227.0 3.8 0.83 and 249.9 256.1 6.3 0.60 BSPD-192 84.2 98.9 14.7 0.37 and 153.9 159.4 5.6 0.53 and 244.5 261.7 17.2 1.87 includin g 254.9 259.0 4.2 2.60 and 266.9 272.7 5.8 0.83 BSPD-208 96.2 101.0 4.8 0.77 and 108.9 112.0 3.1 0.88 and 212.4 224.9 12.6 1.30 and 328.9 339.6 10.7 1.32 Hole ID From (m) To (m) Length (m) Cu (%) Previously Released Holes (new assay results that were previously pending)(1) BSPD-169 117.9 120.7 2.8 0.8 and 167.0 176.0 9.0 0.5 and 213.5 224.8 11.3 0.8 BSPD-175 105.6 115.3 9.7 0.4 and 211.6 217.1 5.5 0.4 Boa Esperança: New Exploration Results
  70. 70. Note: Mineral reserves and resources as outlined in the Boa Esperança Technical Report. Mineral resources shown inclusive of mineral reserves. Mineral resources that are not mineral reserves do not have demonstrated economic viability. Please refer to Additional Information section of this presentation for relevant technical and scientific information. ERO COPPER | 70 Category Tonnage (kt) Grade (% Cu) Contained Cu (kt) Reserves Boa Esperanҫa Proven 30,674 0.89% 273 Probable 12,378 0.67% 83 Total Proven & Probable 43,052 0.83% 357 Resources (Inclusive of Reserves) Open Pit - High Grade Measured 7,117 2.16% 154 Indicated 1,661 2.27% 38 Measured & Indicated 8,778 2.18% 191 Inferred 40 2.69% 1 Open Pit - Low Grade Measured 25,476 0.60% 152 Indicated 13,433 0.51% 68 Measured & Indicated 38,909 0.57% 220 Inferred 514 0.49% 3 Underground - High Grade Measured 0 0.00% 0 Indicated 0 0.00% 0 Measured & Indicated 0 0.00% 0 Inferred 1,354 2.24% 30 Underground - Low Grade Measured 0 0.00% 0 Indicated 0 0.00% 0 Measured & Indicated 0 0.00% 0 Inferred 9,681 0.60% 58 Total Measured 32,593 0.94% 306 Indicated 15,095 0.70% 106 Measured & Indicated 47,687 0.86% 412 Inferred 11,590 0.80% 92 Boa Esperança: Reserves & Resources
  71. 71. 1. Drill holes were drilled from surface. The length of intercept may not represent the true width of mineralization and reported intercepts reflect the entire thickness of the vein. Values may not add up due to rounding. From, to and mineralized intercepts are rounded to the nearest tenth of a meter. ERO COPPER | 71 Hole ID From (m) To (m) Length (m) Au (gpt) San Antonio Extension to Depth SA104A 926.6 933.1 6.5 19.74 SA104B 943.0 946.8 3.8 19.27 SA108 655.1 656.0 0.9 2.58 Matinha Upper Vein MAT30 576.3 581.1 4.8 5.91 MAT31 630.0 633.5 3.5 7.06 MAT33 711.5 718.3 6.8 2.43 including 711.5 712.5 1.0 11.03 MAT34 499.7 502.5 2.8 6.97 MAT37 523.8 526.3 2.5 5.66 MAT43 490.1 493.0 2.9 59.06 NX Gold: New Exploration Results
  72. 72. Note: Mineral resources shown inclusive of mineral reserves. Mineral resources that are not mineral reserves do not have demonstrated economic viability. Please refer to Additional Information section of this presentation for relevant technical and scientific information. ERO COPPER | 72 NX Gold: Reserves & Resources Category Tonnage (kt) Grade (gpt Au) Contained Au (koz) Reserves Santo Antonio Vein Probable 958 9.01 277 Matinha Vein Probable 146 6.26 29 Total Probable 1,104 8.64 307 Resources (Inclusive of Reserves) Santo Antonio Vein Indicated 950 10.56 322 Inferred 248 2.99 24 Matinha Vein Indicated 124 8.55 34 Inferred 310 10.47 104 Other Indicated 7 3.36 1 Inferred 157 4.71 24 Total Indicated 1,081 10.28 357 Inferred 714 6.61 152
  73. 73. Curaça Valley Mineral Reserves Notes: 1. Effective Date of September 30, 2021. 2. Mineral reserves included within stated mineral resources. All figures have been rounded to reflect the relative accuracy of the estimates. Summed amounts may not add due to rounding. 3. The mineral reserve estimates are prepared in accordance with the CIM Definition Standards for mineral resources and mineral reserves, adopted by the CIM Council on May 10, 2014 (the “CIM Standards”), and the CIM Estimation of mineral resources and mineral reserves Best Practice Guidelines, using geostatistical and/or classical methods, plus economic and mining parameters appropriate for the deposit. Mineral reserves are based on a long-term copper price of US$2.75 per pound (“lb”), and a USD:BRL foreign exchange rate of 5.23. Mineral reserves are the economic portion of the measured and indicated mineral resources. Mining dilution and recovery factors vary for specific reserve sources and are influenced by factors such as deposit type, deposit shape, stope orientation and selected mining method. 4. A low-grade envelope using a cut-off grade of 0.20% copper for underground deposits was used to develop a dilution envelope and development block model that was included to define the grade of blocks within the dilution envelope in the planning and design of stopes within the mineral resources and mineral reserve estimate. Curaça Valley Mineral Resources Notes: 1. Effective Date of September 30, 2021. 2. Mineral resources have been constrained within newly developed 3D lithology models applying a 0.45% and 0.20% copper grade envelope for high and marginal grade, respectively. Within these envelopes, mineral resources for underground deposits are constrained using varying stope dimensions of up to 20m by 10m by 35m applying a 0.51% copper cut-off grade, as well as a 0.32% copper marginal cut-off grade for underground deposits. 3. A low-grade envelope using a cut-off grade of 0.20% copper for underground deposits was used to develop a dilution envelope and development block model that was included to define the grade of blocks within the dilution envelope in the planning and design of stopes within the mineral resources and mineral reserve estimate. 4. Mineral resources have been constrained within newly developed 3D lithology models using a 0.21% copper cut-off grade for open pit deposits. 5. Mineral resources estimated by ordinary kriging inside 5m by 5m by 5m blocks. NX Gold Mineral Reserves Notes: 1. Effective Date of September 30, 2021. 2. Mineral reserves included within stated mineral resources. All figures have been rounded to the relative accuracy of the estimates. Summed amounts may not add due to rounding. 3. The mineral reserve estimates are prepared in accordance with the CIM Standards and the CIM Guidelines, using geostatistical and/or classical methods, plus economic and mining parameters appropriate for the deposit. Mineral reserves are based on a long-term gold price of US$1,650 per ounce (“oz”), and a USD:BRL foreign exchange rate of 5.00. Mineral reserves are the economic portion of the Indicated mineral resources. Mineral reserve estimates include operational dilution of 17.4% plus planned dilution of approximately 8.5% within each stope for room-and-pillar mining areas and operational dilution of 3.2% plus planned dilution of 21.2% for cut-and-fill mining areas. Assumes mining recovery of 92.5% and 94.7% for room-and-pillar and cut-and-fill areas, respectively. Practical mining shapes (wireframes) are designed using geological wireframes / mineral resource block models as a guide. NX Gold Mineral Resources Notes: 1. Effective Date of September 30, 2021. 2. Presented mineral resources inclusive of mineral reserves. Indicated mineral resource totals are undiluted. All figures have been rounded to the relative accuracy of the estimates. Summed amounts may not add due to rounding. 3. Mineral resources are estimated using ordinary kriging within 2.5 meter by 2.5 meter by 0.5 meter block size. 4. Mineral resource are constrained using a minimum stope dimension of 2.0 meters by 2.0 meters by 1.5 meters and a cut-off of 1.90 gpt based on gold price of US$1,900 per ounce of gold. 5. The mineral resource estimates are prepared in accordance with the CIM Standards and the CIM Guidelines, using geostatistical and/or classical methods, plus economic and mining parameters appropriate for the deposit. ERO COPPER | 73 Additional Information
  74. 74. Boa Esperança Mineral Reserves Notes: 1. Effective Date of August 31, 2021. 2. Stated mineral resources are inclusive of mineral reserves. All figures have been rounded to the relative accuracy of the estimates. Summed amounts may not add due to rounding. High- grade and low-grade mineral resources defined as greater than or equal to 1.00% copper and less than 1.00% copper, respectively. 3. A 3D geologic model was developed for the Boa Esperança Project. Geologically constrained copper grade shells are developed using a copper cut-off grade of 0.20% and 0.51% for pit constrained and unconstrained mineral resources, respectively, to generate a 3D mineralization model of the Boa Esperança Project. Within grade shells, mineral resources are estimated using ordinary kriging within a 2.0 meter by 2.0 meter by 4.0 meter block size. Open pit constrained, unconstrained and marginal cut-off grades are based upon a copper price of US$6,400 per tonne with cost parameters appropriate to the deposit. The mineral resource estimates are prepared in accordance with the Canadian Institute of Mining, Metallurgy and Petroleum (“CIM”) Definition Standards for Mineral Resources and Mineral Reserves, adopted by the CIM Council on May 10, 2014 (the “CIM Standards”), and the CIM Estimation of Mineral Resources and Mineral Reserves Best Practice Guidelines, adopted by CIM Council on November 29, 2019 (the ‘CIM Guidelines”), using geostatistical and/or classical methods, plus economic and mining parameters appropriate to the deposit. 4. Mineral reserve estimates are prepared in accordance with the CIM Standards and the CIM Guidelines, using geostatistical and/or classical methods, plus economic and mining parameters appropriate for the deposit. Mineral reserves are based on a long-term copper price of US$6,613 per tonne; concentrate grade of 27% copper; average metallurgical recoveries of 91.3%; copper concentrate logistics costs of US$108.20 per wet metric tonne ("wmt"); transport losses of 0.2%; copper concentrate treatment charges of US$59.50 per dry metric tonne ("dmt"), refining charges of U$0.0595 per pound of copper; copper payability of 96.3%; average mining cost of US$2.47 per tonne mined; processing cost of US$7.74 per tonne processed and G&A costs of US$3.83 per tonne processed; average pit slope angles that range from 30º for saprolite to 50º for fresh rock and a 2% CFEM government royalty. 5. Mineral reserves are classified according to the CIM Standards and the CIM Guidelines by Mr. Carlos Guzman, RM CMC (0119) and FAusIMM (229036), an employee of NCL Ingenieria y Construcion SpA ("NCL") and an independent qualified person as such term is defined under NI 43-101. NCL is independent of the Company. Please refer to the Boa Esperança Technical Report for additional technical information. Boa Esperança Mineral Resources Notes: 1. Effective Date of August 31, 2021. 2. Presented Mineral Resources inclusive of Mineral Reserves. Summed amounts may not add due to rounding. High-grade and low-grade mineral resources defined as greater than or equal to 1.00% copper and less than 1.00% copper, respectively. 3. A 3D geologic model was developed for the Project. Geologically constrained grade shells were developed using various copper cut-off grades to generate a 3D mineralization model of the Project. Within the grade shells, mineral resources were estimated using ordinary kriging within a 2.0 meter by 2.0 meter by 4.0 meter block size. Within the optimized resource open pit limits, a cut-off grade of 0.20% copper was applied based upon a copper price of US$6,400 per tonne, net smelter return ("NSR") of 94.53%, average metallurgical recoveries of 90.7%, mining recovery of 95.0%, dilution of 5.0%, mining costs of US$3.10 per tonne mined run of mine ("ROM"), processing and transportation costs of US$5.65 per tonne ROM, and G&A costs of US$2.66 per tonne ROM. Unconstrained inferred mineral resources have been stated at a cut-off grade of 0.51% copper with a marginal cut-off grade of 0.32% copper based upon a copper price of US$6,400 per tonne, NSR of 94.53%, mining recovery of 100%, average metallurgical recoveries of 90.7%, mining costs of US$14.71 per tonne ROM, processing and transportation costs of US$5.70 per tonne ROM, and G&A costs of US$2.60 per tonne ROM. 4. Block model tonnage and grade estimates for the Project were classified according to the CIM Standards and the CIM Guidelines by Mr. Emerson Ricardo Re, RM CMC (0138) and MAusIMM (CP) (305892), an employee of Ero Copper Corp. and a qualified person as such term is defined under NI 43-101. Please refer to the Boa Esperança Technical Report for additional technical information. ERO COPPER | 74 Additional Information (cont’d)
  75. 75. Suite 1050, 625 Howe Street, Vancouver, BC, V6C 2T6 www.erocopper.com Investor Inquiries: Courtney Lynn, VP Corporate Development & Investor Relations +1.604.335.7504 info@erocopper.com ERO COPPER | 75

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