Slides
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R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Q3 2026 Earnings Call November 2026 | TSX: ERO | NYSE: ERO
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2 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 2 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Disclaimer 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” or “view,” or the negative or grammatical variations thereof or comparable terminology. Forward-looking statements may include, but are not limited to, statements regarding the Company’s expected production, operating costs and capital expenditures at the Caraíba Operations, the Tucumã Operation and the Xavantina Operations; estimates of mineral reserves and mineral resources; the Company’s ability to maintain improved operating performance at the Caraíba Operations and realize the anticipated benefits associated with the Pilar Mine’s new external shaft; the expected timing of the delivery, installation and commissioning of modular tailings filters at the Tucumã Operation and the anticipated impact of completed and planned filtration initiatives on filtration capacity and plant throughput; the anticipated benefits of completed ventilation and cooling infrastructure upgrades and the commissioned filter press and industrial dryer at the Xavantina Operations, including their expected impact on mining rates, processing rates and concentrate drying times; expectations regarding foreign exchange derivative contracts, including expected gains thereon and the exchange rate assumptions underlying such expectations, and the Company’s ability to advance engineering, permitting and pre-feasibility study work at the Furnas Copper-Gold Project following completion of the Phase 3 drilling program, including the timing and results of such work. Forward-looking statements are not a guarantee of future performance. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Forward-looking statements involve statements about the future and are inherently uncertain, and the Company’s actual results, achievements or other future events or conditions may differ materially from those reflected in the forward-looking statements due to a variety of risks, uncertainties and other factors, including, without limitation, those referred to herein and in the Company's most recent Annual Information Form (“AIF”) under the heading “Risk Factors”. The Company’s forward-looking statements are based on the assumptions, beliefs, expectations and opinions of management as of the date such statements are made, many of which may be difficult to predict and beyond the Company’s control. In connection with the forward-looking statements contained in this presentation and in the Company’s most recent AIF, the Company has made certain assumptions about, among other things: favourable equity and debt capital markets; the availability of financing on reasonable terms, if required, to advance the production, development and exploration of the Company’s properties and assets; future prices of copper, gold and other commodities; foreign exchange rates, including the exchange rate between the Brazilian real and the U.S. dollar; interest rates, tariff rates, inflation and other economic conditions; the availability and cost of labour, equipment, services, power, fuel and other key supplies and consumables; production estimates, mineral grades, recoveries, operating costs, capital expenditures and the assumptions underlying the Company’s full-year 2026 guidance; the accuracy of mineral reserve and mineral resource estimates and the geological, operational and economic assumptions on which they are based; the Company’s ability to maintain improved operating performance at the Caraíba Operations and realize the anticipated benefits associated with the Pilar Mine’s new external shaft; the timely delivery, installation and commissioning of modular tailings filters at the Tucumã Operation and the realization of the anticipated benefits of completed and planned filtration initiatives, including increased filtration capacity and plant throughput; the realization of the anticipated benefits of completed ventilation and cooling infrastructure upgrades and the commissioned filter press and industrial dryer at the Xavantina Operations, including higher mining and processing rates and reduced concentrate drying times; the Company’s ability to advance engineering, permitting and pre-feasibility study work at the Furnas Copper-Gold Project, following completion of the Phase 3 drilling program, in accordance with anticipated schedules and budgets; the availability of contractors and other third parties to perform work on expected terms and timelines; the timely receipt and maintenance of required permits, licences and regulatory approvals; the absence of material adverse changes in applicable laws, regulations, taxation, royalties, permitting requirements or government policies; the absence of material operational interruptions, equipment failures, labour disruptions, supply-chain constraints, geotechnical events, adverse weather events, environmental incidents or other unforeseen events; the Company’s ability to maintain constructive relationships with employees, contractors, local communities, government authorities and other stakeholders; the physical supply of key inputs and consumables remaining secure and uninterrupted; the Company’s ability to execute its operating, development, exploration and capital allocation plans, including the continued reduction of net debt and leverage; and the Company continuing to satisfy the terms and conditions of its current loan arrangements. 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 to the extent required by applicable securities laws. This presentation may contain future-oriented financial information and financial outlooks (collectively, “FOFI”) within the meaning of applicable Canadian securities laws. The FOFI contained in this presentation was approved by management as of the date of this presentation and is provided solely for the purpose of presenting management’s reasonable estimates, expectations and projections regarding the Company’s anticipated future business operations and financial performance. Such information may not be appropriate for other purposes. The FOFI reflects management’s current beliefs and is based on information currently available to the Company and on assumptions that management believes are reasonable, including the assumptions described under “Caution Regarding Forward-Looking Information and Statements.” Actual results may differ materially from those expressed or implied by the FOFI because of various risks, uncertainties and other factors, including those described in this presentation and in the Company’s most recent AIF and management’s discussion and analysis (“MD&A”). Certain of these risks, uncertainties and other factors are beyond the Company’s control. Accordingly, all FOFI contained in this presentation is qualified by these cautionary statements, and there can be no assurance that the anticipated results will be realized. Except as required by applicable securities laws, the Company disclaims any intention or obligation to update or revise any FOFI, whether as a result of new information, future events or otherwise. Cautionary Notes Regarding Mineral Resource and Mineral Reserve Estimates Unless otherwise indicated, all mineral reserve and mineral resource estimates included in this presentation and the documents incorporated by reference herein have been prepared in accordance with National Instrument 43-101, Standards of Disclosure for Mineral Projects (“NI 43-101") and the Canadian Institute of Mining, Metallurgy and Petroleum (the “CIM”) — CIM Definition Standards on Mineral Resources and Mineral Reserves, adopted by the CIM Council, as amended (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. Canadian standards, including NI 43-101, differ significantly from the requirements of the United States Securities and Exchange Commission (the “SEC”), and mineral reserve and mineral resource information included herein may not be comparable to similar information disclosed by U.S. companies. In particular, and without limiting the generality of the foregoing, this presentation and the documents incorporated by reference herein use the terms “measured resources,” “indicated resources” and “inferred resources” as defined in accordance with NI 43-101 and the CIM Standards.
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3 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 3 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Disclaimer General Scientific and technical information contained in this presentation has been reviewed, verified and approved by Mr. Cid Gonçalves Monteiro Filho, SME RM (04317974), MAIG (No. 8444), FAusIMM (No. 329148), the Resource Manager of the Company, who is a “qualified person” within the meaning of NI 43-101. Scientific and technical information contained in this presentation relating to the Company’s mining operations located within the Curaçá Valley, northeastern Bahia State, Brazil (the “Caraíba Operations”), is derived from, and in some instances is a direct extract from, and based on the assumptions, qualifications and procedures set out in, the report prepared in accordance with NI 43-101 and entitled “2022 Mineral Resources and Mineral Reserves of the Caraíba Operations, Curaçá Valley, Bahia, Brazil”, dated December 22, 2022 with an effective date of September 30, 2022, prepared by Porfirio Cabaleiro Rodriguez, FAIG, Bernardo Horta de Cerqueira Viana, FAIG, Fábio Valério Câmara Xavier, MAIG and Ednie Rafael Moreira de Carvalho Fernandes, MAIG all of GE21 Consultoria Mineral Ltda. (“GE21”), Dr. Beck Nader, FAIG of BNA Mining Solutions (“BNA”) and Alejandro Sepulveda, Registered Member (#0293) (Chilean Mining Commission) of NCL Ingeniería y Construcción SpA (“NCL”) (the “2022 Caraíba Operations Technical Report”). Each author was a “qualified person” and “independent” of the Company within the meaning of NI 43-101 as of the date of the report. Scientific and technical information contained in this presentation relating to the Company’s mining operations located approximately 18 km west of the town of Nova Xavantina, southeastern Mato Grosso State, Brazil (the “Xavantina Operations” and formerly known as the “NX Gold Mine”), is derived from, and in some instances is a direct extract from, and based on the assumptions, qualifications and procedures set out in, the report prepared in accordance with NI 43-101 and entitled “Technical Report on the Xavantina Operations, Mato Grosso, Brazil”, dated December 19, 2025 with an effective date of June 30, 2025, prepared by Branca Horta de Almeida Abrantes, MAIG, Hugo Ribeiro de Andrade Filho, FAusIMM (CP), Leonardo de Moraes Soares, MAIG, Paulo Roberto Bergmann Moreira, FAusIMM and Porfirio Cabaleiro Rodriguez, FAIG, all of GE21 (the “2025 Xavantina Operations Technical Report”). Each of Branca Horta de Almeida Abrantes, MAIG, Hugo Ribeiro de Andrade Filho, FAusIMM (CP), Leonardo de Moraes Soares, MAIG, Paulo Roberto Bergmann Moreira, FAusIMM, and Porfirio Cabaleiro Rodriguez, FAIG, was a “qualified person” and “independent” of the Company within the meaning of NI 43-101 as of the date of the report. Scientific and technical information contained in this presentation relating to the Tucumã Operation, which is located within southeastern Pará State, Brazil (referred to herein as the “Tucumã Operation” or by its former name, the “Boa Esperança Project”), is derived from, and in some instances is a direct extract from, and based on the assumptions, qualifications and procedures set out in, the report prepared in accordance with NI 43-101 and entitled “Boa Esperança Project NI 43-101 Technical Report on Feasibility Study Update”, dated November 12, 2021 with an effective date of August 31, 2021, prepared by Kevin Murray, P.Eng. and Scott C. Elfen, P.E. each of Ausenco Canada Inc. (“Ausenco Canada”), Erin L. Patterson, P.E., formerly employed by its affiliate Ausenco USA South Inc. (“Ausenco USA”), Carlos Guzmán, FAusIMM RM (Chilean Mining Commission) of NCL Ingenieria y Construccion SpA (“NCL”), and Emerson Ricardo Ré, MSc, MBA, MAusIMM (CP) (No. 305892), Registered Member (No. 0138) (Chilean Mining Commission) and Resource Manager of the Company as of the date of the report (now with HCM Consultoria Geologica Eireli (“HCM”)) (the “2021 Tucumã Operation Technical Report”). Each of Kevin Murray, P.Eng., Scott C. Elfen, P.E., Carlos Guzmán, FAusIMM RM CMC and Emerson Ricardo Ré, MAusIMM (CP), is a “qualified person” within the meaning of NI 43-101. Each of Kevin Murray, P.Eng., Scott C. Elfen, P.E., and Carlos Guzmán, FAusIMM RM CMC was “independent” of the Company within the meaning of NI 43-101 as of the date of the report. Erin L. Patterson, P.E., who is no longer employed by Ausenco USA, was a “qualified person” and “independent" of the Company within the meaning of NI 43-101 as of the date of the report. Mr. Ré, who was Resource Manager of the Company as of the date of the report and is now with HCM, was a “qualified person” but was not “independent” of the Company within the meaning of NI 43-101 as of the date of the report. Scientific and technical information contained in this presentation relating to the Furnas Project, located in the Carajás Mineral Province in Pará State, Brazil, is derived from, and in some instances is a direct extract from, and based on the assumptions, qualifications and procedures set out in the report prepared in accordance with NI 43-101 and entitled “Preliminary Economic Assessment for the Furnas Project, Pará State, Brazil (NI 43-101 Technical Report)", dated March 30, 2026 with an effective date of February 23, 2026, prepared by João Estevão Junior, MAIG, of SDPM (the "2026 Furnas Project Technical Report"), who is a “qualified person” and “independent” of the Company within the meaning of NI 43-101 as of the date of the report. Please see the Company’s AIF and the 2022 Caraíba Operations Technical Report, the 2025 Xavantina Operations Technical Report, the 2021 Tucumã Operation Technical Report and the 2026 Furnas Project Technical Report, each filed under the Company’s profile on SEDAR+ and EDGAR. These documents provide additional information regarding the data verification undertaken with respect to the scientific and technical information contained in this presentation, including related exploration information and interpretations, QA/QC procedures, sampling, analytical and testing results, and the mineral resource and mineral reserve estimates disclosed herein. Third Party Information This presentation includes market, industry and economic data that was obtained from various publicly available sources and other sources believed by the Company to be true. Although the Company believes such information 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 makes no representation regarding the accuracy or completeness of such information. Non-IFRS and Other Financial Measures The Company prepares its financial results in accordance with IFRS Accounting Standards. This presentation refers to certain non-IFRS financial measures, non-IFRS ratios, capital management measures and supplementary financial measures, including copper C1 cash cost, realized copper price, gold C1 cash cost, gold all-in sustaining cost (“AISC”), realized gold price, earnings before interest, taxes, depreciation and amortization (“EBITDA”), adjusted EBITDA, adjusted net income attributable to owners of the Company, adjusted net income per share attributable to owners of the Company, net debt or net cash, working capital and available liquidity. These measures are not standardized financial measures under IFRS Accounting Standards and might not be comparable to similarly titled measures disclosed by other issuers. These measures should not be considered in isolation or as a substitute for financial measures prepared in accordance with IFRS Accounting Standards. The Company believes that these measures, together with financial measures prepared in accordance with IFRS Accounting Standards, provide investors with useful information to evaluate the underlying performance of the Company’s operations, liquidity, debt-service capacity and financial position. For definitions of these measures, explanations of how management uses them and reconciliations to the most directly comparable financial measures presented in accordance with IFRS Accounting Standards, where applicable, please refer to the section entitled “Alternative Performance (Non-IFRS) Measures” in the Company’s most recent MD&A, which is available under the Company’s profile on SEDAR+ and EDGAR and is incorporated by reference into this presentation.
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4 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 4 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Presenters Wayne Drier EVP & Chief Financial Officer Makko DeFilippo President & CEO Courtney Lynn EVP, External Affairs & Strategy Gelson Batista EVP & Chief Operating Officer Farooq Hamed VP, Investor Relations
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5 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 5 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Q3 2026: Strategy in Action *This is a non-IFRS financial measure and does not have a standardized meaning prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of non -IFRS measures in its most recent MD&A. 1. The expected impacts of the modular filters have not been incorporated into full-year 2026 operational guidance. FINANCIAL STRENGTH ~$100M Q3 Net Debt* Reduction OPERATING MOMENTUM +6% Cu QoQ Copper Production Growth +23% Au QoQ Total Gold from Xavantina Measurable Results Record Cash Generation Accelerated Deleveraging ✓ Net debt leverage ratio improved to 0.5x. ✓ Available liquidity increased to $264M. Operating Momentum Strengthened Across the Portfolio ✓ Plant throughput increased sequentially across all three operations. Strong development performance at Xavantina in Q3 has positioned the operation for increased operational flexibility, expected to support higher sustained mining rates within higher-grade portions of the mine. Tucumã tailings filtration capacity expansion on track for completion prior to year-end. Furnas Drilling Completed Ahead of Schedule ✓ Completed the 45,000-meter Phase 3 drill program, satisfying the exploration requirements of the earn-in agreement more than two years ahead of schedule. Advancing Pre-Feasibility Study workstreams on schedule. Disciplined execution is strengthening the balance sheet, operations and growth pipeline.
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6 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 6 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors $621/oz Historic Gold Concentrate C1 Cash Costs* Q3 2026 Highlights * These are non-IFRS financial measures and do not have standardized meanings prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of Non-IFRS measures in its most recent MD&A. 18,345 tonnes Consolidated Copper Production 7,844 ounces Mined Gold Production 17,414 ounces Gold Recovered from Historic Concentrate Stockpiles $2.51/lb Consolidated Copper C1 Cash Costs* $191.2 million Cash Flow from Operations $1,892/oz Gold Production C1 Cash Costs* $1.22 Adjusted Net Income per Share* $200.6 million Adjusted EBITDA* Total Gold of25,258 ounces
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7 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 7 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Strong adjusted EBITDA growth and disciplined debt reduction drove gross and net leverage ratios down ~2.0 turns. Disciplined Deleveraging, Expanding Financial Flexibility 2.8x 2.7x 2.3x 2.2x 1.5x 1.2x 1.0x 0.7x 2.6x 2.4x 2.1x 1.9x 1.2x 1.0x 0.8x 0.5x Dec-24 Mar-25 Jun-25 Sep-25 Dec-25 Mar-26 Jun-26 Sep-26 Total Debt / LTM Adj. EBITDA Net Debt / LTM Adj. EBITDA Gross and net leverage down over 2.0x in 21 months * These are non-IFRS financial measures and do not have standardized meanings prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of Non-IFRS measures in its most recent MD&A. $552M → $353M Dec-24 Sep-26 36% Reduction $216M → $656M Dec-24 Sep-26 204% Growth $90M → $264M Dec-24 Sep-26 ~3x Increase NET DEBT* LTM ADJUSTED EBITDA* AVAILABLE LIQUIDITY*
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8 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 8 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 5.46 5.34 5.20 5.23 5.04 4.98 5.13 5.12 5.15 5.07 5.40 4.50 4.75 5.00 5.25 5.50 5.75 6.00 6.25 6.50 Dec-25 Jan-26 Feb-26 Mar-26 Apr-26 May-26 Jun-26 Jul-26 Aug-26 Sep-26 Oct-26 Nov-26 Dec-26 5.16 Source: FactSet Research Systems * Includes $30.3 million realized FX hedge gain YTD. FX Hedges Offsetting Impact of Stronger BRL Realized FX gains have totaled $30 million year-to-date, with remaining 2026 hedges covering US$135 million of BRL exposure in Q4 at an average floor of 5.54 BRL/USD 1.00. H2 2026 Weighted Avg. Ceiling 6.42 BRL / USD 1.00 H2 2026 Weighted Avg. Floor 5.54 BRL / USD 1.00 H1 2026 Weighted Avg. Ceiling 6.31 BRL / USD 1.00 H1 2026 Weighted Avg. Floor 5.53 BRL / USD 1.00 Hedge protection active below this line FX hedge gains have totaled $30 million through the end of Q3. Actual Forward-Looking
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9 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 9 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Nearly 97 cents of every dollar of cash available for deleveraging(1) has translated into repayment of debt principal YTD. Delivering on Our Commitment to Deleverage 1. Capital expenditures include "Additions to mineral properties, plant and equipment" and "Additions to exploration and evaluat ion assets.“ Interest, lease & finance payments includes "Lease liability payments", "Interest paid on loans and borrowings" and "Other finance expenses paid". Please se the Company’s most recent Financial Statements for more in formation. CASH AVAILABLE FOR DELEVERAGING(1) DEBT PRINCIPAL 2026 Year-to-date 97% converted into principal reduction $132M repaid Disciplined capital allocation has reduced debt principal by $132 million in three quarters. $422M ($222M) ($63M) $136M Operating cash flow Capital expenditures Interest, lease & finance payments Cash available for deleveraging $600M $468M Debt at Q4 2025 Principal Repaid Debt at Q3 2026 $155M Credit Facility $45M Other $400M Senior Notes ($132M) $400M Senior Notes $50M $18M
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R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Q3 2026 Operating Highlights
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11 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 11 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Caraíba Operations * These are non-IFRS financial measures and do not have standardized meanings prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of Non-IFRS measures in its most recent MD&A. 9.1 10.4 8.8 8.4 9.4 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 1.01 1.00 0.93 0.87 0.90 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 997 1,175 1,072 1,074 1,161 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 Tonnes Processed (kt) Grade Processed (%) Cu Production (kt) C1 Cash Costs* ($/lb produced) ▪ 12% increase in production driven by higher plant throughput and modestly higher processed grades and recoveries. ▪ C1 cash costs* reflected accelerated waste stripping at Surubim, increased diesel and maintenance costs, and the continued strength of the BRL. ▪ Q4 expected to benefit from higher planned mined and processed grades, with unit costs expected to decline. 2.32 2.27 2.79 2.76 2.89 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26
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12 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 12 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Tucumã Operation * These are non-IFRS financial measures and do not have standardized meanings prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of Non-IFRS measures in its most recent MD&A. 1. The expected impacts of the modular filters have not been incorporated into full -year 2026 operational guidance. Tonnes Processed (kt) Grade Processed (%) Cu Production (kt) ▪ Production was in line with the prior quarter, as improved plant throughput offset lower planned processed grades and recoveries. ▪ C1 cash costs* were also in line with the prior quarter, with OneEro savings offsetting the impact of inflationary pressures and a stronger BRL. ▪ Q4 production is expected to benefit from higher plant throughput and recoveries. ▪ Installation and commissioning of modular tailings filters(1) remain on track for completion prior to year-end. 575 517 564 715 814 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 1.51 1.93 1.66 1.44 1.30 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 7.6 9.3 8.5 9.0 9.0 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 C1 Cash Costs* ($/lb produced) 1.62 1.75 1.97 2.10 2.12 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26
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13 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 13 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors ▪ Total gold increased 23% quarter- on-quarter. ▪ Gold recovered from historic concentrate stockpiles increased 47%, reflecting drier seasonal conditions and the benefit of additional drying infrastructure. ▪ Strong development performance in Q3 has positioned the operation for increased operational flexibility, expected to support higher sustained mining rates within higher-grade portions of the mine. 9.1 13.8 5.5 8.7 7.8 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 Xavantina Operations * These are non-IFRS financial measures and do not have standardized meanings prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of Non-IFRS measures in its most recent MD&A. Grade Processed (gpt) Au Production from Mine (koz)Tonnes Processed (kt) Au Production C1 Cash Costs* ($/oz produced) Au Production AISC* ($/oz produced) 48 53 37 49 55 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 8.15 9.98 5.66 6.20 4.90 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 1,086 766 2,120 1,586 1,892 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 2,425 1,702 4,441 2,881 3,607 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 15.0 2.1 11.9 17.4 Q4/25 Q1/26 Q2/26 Q3/26 915 633 621 Q1/26 Q2/26 Q3/26 Au Recovered from Historic Concentrate Stockpiles (koz) Historic Au Concentrate C1 Cash Costs* ($/oz recovered)
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R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Q3 2026 Financial Highlights
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15 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 15 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Key Financial Metrics Cash Flow from Operations (US$M) $110 $129 $93 $138 $191 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 Adjusted EBITDA* (US$M) $77 $187 $125 $144 $201 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 Adjusted Net Income* (US$M) $28 $108 $72 $87 $129 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 Adjusted Net Income* (US$ per diluted share) $0.27 $1.04 $0.69 $0.83 $1.22 Q3/25 Q4/25 Q1/26 Q2/26 Q3/26 * These are non-IFRS financial measures and do not have standardized meanings prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of Non-IFRS measures in its most recent MD&A.
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16 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 16 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 2026 Guidance Update Note: For more information on the Company’s 2026 updated guidance, please refer to its Earnings Press Release dated November 2, 2026 . 1. Assumes $30.3 million realized gains through the end of Q3 from the Company's foreign exchange hedge program, allocated to th e operations for the purposes of calculating unit cash costs as follows: 55% ($16.7 million) to Caraíba, 30% ($9.1 million) to Tucumã, and 15% ($4.5 million) to Xavantina. Previous Guidance Current Guidance Current Guidance with YTD $30M FX Gain Applied(1) Consolidated Copper Production (tonnes) Caraíba Operations 35,000 - 40,000 35,000 - 40,000 35,000 - 40,000 Tucumã Operation 32,500 - 37,500 32,500 - 37,500 32,500 - 37,500 Total Copper 67,500 - 77,500 67,500 - 77,500 67,500 - 77,500 Consolidated Copper C1 Cash Cost ($/lb) Caraíba Operations $2.30 - $2.50 $2.55 - $2.75 $2.35 - $2.55 Tucumã Operation $1.95 - $2.15 $1.95 - $2.15 $1.85 - $2.05 Consolidated Copper Operations $2.15 - $2.35 $2.25 - $2.45 $2.10 - $2.30 The Xavantina Operations (oz) Mined Gold Production 40,000 - 50,000 30,000 - 35,000 30,000 - 35,000 Gold Recovered from Historic Stockpiles — Approx. 45,000 Approx. 45,000 Total Gold 40,000 - 50,000 75,000 - 80,000 75,000 - 80,000 Mined Gold Production Costs ($/oz) C1 Cash Cost $1,100 - $1,350 $1,650 - $1,800 $1,600 - $1,750 AISC $2,200 - $2,700 $3,300 - $3,600 $3,250 - $3,550 Capital Expenditures ($ in millions) $285 - $330 $285 - $330 $285 - $330
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17 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors 17 R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Illustrative Impact of FX Hedges on C1 Cash Costs C1 Cash Cost – Caraíba ($/lb) Cash Costs are non-IFRS financial measures and do not have standardized meanings prescribed by IFRS and might not be comparable to similar financial measures disclosed by other issuers. Please refer to the Company’s discussion of Non-IFRS measures in its most recent MD&A. ($0.20) Current Guidance Cash Impact of FX Hedge Guidance with YTD $30M FX Gain Applied C1 Cash Cost – Tucumã ($/lb) C1 Cash Cost – Consolidated Cu ($/lb) C1 Cash Cost – Xavantina ($/oz) ($0.10) Current Guidance Cash Impact of FX Hedge Guidance with YTD $30M FX Gain Applied ($0.15) Current Guidance Cash Impact of FX Hedge Guidance with YTD $30M FX Gain Applied ($50) Current Guidance Cash Impact of FX Hedge Guidance with YTD $30M FX Gain Applied $2.55 - $2.75 $2.35 - $2.55 $1.95 - $2.15 $1.85 - $2.05 $2.25 - $2.45 $2.10 - $2.30 $1,650 - $1,800 $1,600 - $1,750
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R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors R: 0 G: 128 B: 128 #008080 Logo Teal R: 0 G: 74 B: 74 #004a4a R: 92 G: 93 B:84 #5c5d54 Logo Charcoal R: 199 G: 229 B: 228 #c7e5e4 R: 167 G: 169 B: 172 #a7a9ac R: 124 G: 47 B: 72 #7c2f48 R: 44 G: 62 B: 96 #2c3e60 R: 217 G: 164 B: 65 #d9a441 R: 194 G: 89 B: 17 #c25911 Primary Colors Secondary Colors Farooq Hamed VP, Investor Relations E-mail: info@ero.com 1050-625 Howe St, Vancouver, BC, V6C 2T6 www.ero.com