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A NEW CAPSTONE JANUARY 2020 Cautionary Notes CAUTIONARY NOTE ON FORWARD LOOKING INFORMATION COMPLIANCE WITH NI 43-101 This presentation, and the documents incorporated by reference herein, may contain forward-looking information within


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SLIDE 1

A NEW CAPSTONE

JANUARY 2020

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SLIDE 2

CAUTIONARY NOTE ON FORWARD LOOKING INFORMATION

This presentation, and the documents incorporated by reference herein, may contain “forward-looking information” within the meaning of Canadian securities legislation and “forward-looking statements” within the meaning of the United States Private Securities Litigation Reform Act of 1995 (collectively, “forward-looking statements”). These forward-looking statements are made as of the date of this document and Capstone Mining Corp. (“Capstone” or the “Company”) does not intend, and does not assume any obligation, to update these forward-looking statements, except as required under applicable securities

  • legislation. Forward-looking statements relate to future events or future performance and reflect our expectations or beliefs

regarding future events. Forward-looking statements include, but are not limited to, statements with respect to the estimation of mineral resources and mineral reserves, the realization of mineral reserve estimates, the timing and amount of estimated future production, costs of production and capital expenditures, the success of our mining operations, environmental risks, unanticipated reclamation expenses and title disputes. In certain cases, forward-looking statements can be identified by the use of words such as “plans”, “expects”, “guidance”, “scheduled”, “estimates”, “forecasts”, "future state", “intends”, “anticipates”, “believes” or variations of such words and phrases, or statements that certain actions, events or results “may”, “could”, “would”, “might” or “will be taken”, “occur” or “be achieved” or the negative of these terms or comparable terminology. In this document certain forward-looking statements are identified by words such as “expects”, “approximately”, “could”, “expects”, “target”, “targeting”, “guidance”, “potential”, “extended”, “convert”, “will”, “provides” “plan” and “expected”. By their very nature, forward- looking statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Such factors include, amongst others, risks related to inherent hazards associated with mining operations and closure of mining projects, future prices of copper and other metals, compliance with financial covenants, surety bonding, our ability to raise capital, Capstone’s ability to acquire properties for growth, counterparty risks associated with sales of our metals, foreign currency exchange rate fluctuations, changes in general economic conditions, accuracy of mineral resource and mineral reserve estimates, operating in foreign jurisdictions with risk of changes to governmental regulation, compliance with governmental regulations, compliance with environmental laws and regulations, reliance on approvals, licences and permits from governmental authorities, impact of climatic conditions on our operations, aboriginal title claims and rights to consultation and accommodation, land reclamation and mine closure obligations, uncertainties and risks related to the potential development of the Santo Domingo Project, increased operating and capital costs, challenges to title to our mineral properties, maintaining ongoing social license to operate, dependence on key management personnel, potential conflicts of interest involving our directors and officers, corruption and bribery, limitations inherent in our insurance coverage, labour relations, increasing energy prices, competition in the mining industry, risks associated with joint venture partners, our ability to integrate new acquisitions into our operations, cybersecurity threats, legal proceedings, and other risks of the mining industry as well as those factors detailed from time to time in the Company’s interim and annual financial statements and MD&A of those statements, all of which are filed and available for review under the Company’s profile on SEDAR at www.sedar.com. Although the Company has attempted to identify important factors that could cause our actual results, performance or achievements to differ materially from those described in our forward-looking statements, there may be other factors that cause our results, performance or achievements not to be as anticipated, estimated

  • r intended. There can be no assurance that our forward-looking statements will prove to be accurate, as our actual results,

performance or achievements could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on our forward-looking statements.

COMPLIANCE WITH NI 43-101

Unless otherwise indicated, Capstone has prepared the technical information in this presentation (“Technical Information”) based on information contained in the technical reports and news releases (collectively the “Disclosure Documents”) available under Capstone Mining Corp.’s company profile on SEDAR at www.sedar.com. Each Disclosure Document was prepared by or under the supervision of a qualified person (a “Qualified Person” or “QP”) as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators (“NI 43-101”). For readers to fully understand the information in this presentation, they should read the Technical Reports (available on www.sedar.com) in their entirety, including all qualifications, assumptions and exclusions that relate to the information set

  • ut in this presentation which qualifies the Technical Information. Readers are advised that mineral resources that are not

mineral reserves do not have demonstrated economic viability. The Disclosure Documents are each intended to be read as a whole, and sections should not be read or relied upon out of context. The Technical Information is subject to the assumptions and qualifications contained in the Disclosure Documents. For further details refer to the Company’s NI 43- 101 Technical Reports as follows:

  • Cozamin Mine, Zacatacas, Mexico published Jan 24, 2019, effective Oct 24, 2018;
  • Pinto Valley Mine Life Extension – Phase 3 (PV3) Pre-feasibility Study, Miami, Arizona, published Feb 23, 2016,

effective Jan 1, 2016; and

  • Santo Domingo Project, Region III, Chile, Feasibility Study Update, published Jan 3, 2019, effective Nov 26, 2018.

The Technical Information in this presentation has been prepared in accordance with NI 43-101 and reviewed and approved by Brad Mercer, P. Geol., Capstone's Senior Vice President, Operations and Exploration, a Qualified Person as defined in NI 43-101.

ALTERNATIVE PERFORMANCE MEASURES

“C1 cash cost”, “cash cost”, “adjusted EBITDA”, “operating cash flow before changes in working capital” and “net debt” are Alternative Performance Measures. Alternative performance measures are furnished to provide additional information. These non-GAAP performance measures are included in this presentation because these statistics are key performance measures that management uses to monitor performance, to assess how the Company is performing, to plan and to assess the overall effectiveness and efficiency of mining operations. These performance measures do not have a standard meaning within IFRS and, therefore, amounts presented may not be comparable to similar data presented by other mining

  • companies. These performance measures should not be considered in isolation as a substitute for measures of

performance in accordance with IFRS. For full information, please refer to the Company’s latest Management Discussion and Analysis published on its Financial Reporting webpage or on SEDAR.

CURRENCY

All amounts are in US$ unless otherwise specified.

FOOTNOTES

Refer to the FOOTNOTES slide for all references throughout this presentation.

Cautionary Notes

CAPSTONE MINING (TSX:CS) • 2

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SLIDE 3

COMPLEMENTARY PORTFOLIO

  • Cozamin: first quartile cost mine with sustainable free

cash flow from growing copper and silver production

  • Pinto Valley: unrivalled leverage to copper with growing

production through quick payback, high impact projects

  • Santo Domingo: only fully-permitted greenfield project in

Chile

STEP CHANGE OPTIONALITY

  • Cozamin: exploration excellence and production growth
  • Pinto Valley: mill modernization and future expansion
  • Santo Domingo: strategic process ongoing and cobalt
  • pportunities

THE RIGHT MANAGEMENT TEAM

  • Focused on maximizing value of existing assets
  • Strong mine general managers operating as business
  • wners
  • Best in class exploration team with proven track record of

adding shareholder value through the drill bit

BALANCE SHEET FOR GROWTH

  • ~$30 million of sustainable cost cuts
  • Strong balance sheet
  • Unhedged copper exposure in anticipated bull market

POSITIONED FOR TRANSFORMATIONAL GROWTH

A New Capstone Mining

CAPSTONE MINING (TSX:CS) • 3

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SLIDE 4

NEW CAPSTONE Asset Quality

  • Stronger, more concentrated asset base
  • Prudent capital investment plans to increase NAV

Growth

  • Near term 20% organic production growth and 10% lower costs
  • Cozamin and Pinto Valley have potential for significant expansions and extensions to mine life
  • Santo Domingo provides transformational growth opportunity

Cost Structure

  • Sustainable cost reduction program eliminated ~$30 million from the business; ~$20 million

was from Pinto Valley

  • Cozamin no longer has a silver stream

Balance Sheet

  • Paid down $120M debt since 20171
  • Peer leading lowest Net Debt to EBITDA ratio of 1.51

G&A

  • Peer leading lowest G&A of $0.08/lb; reduced G&A by $4M to ~$13M

Leadership

  • Lean, focused and driven management team
  • Decentralized structure, strong mine general managers operating as business owners

Why We’re Better Positioned Than Ever

CAPSTONE MINING (TSX:CS) • 4

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SLIDE 5

Growth, Free Cash Flow, Unparalleled Leverage To Copper

CAPSTONE MINING (TSX:CS) • 5

PINTO VALLEY

  • Current copper production of 115 Mlbs,

C1 cash costs of $2.151

  • Low capex, one year payback mill optimization

project to boost production to 130 Mlbs with 10% lower costs by 2021

  • Remaining mine life2 of ~20 years
  • Expansion study looking to tap into Measured

and Indicated Resource of one billion tonnes2 at similar Reserve copper grades

COZAMIN

  • Generated free cash flow >$450M since 2007;

targeting higher free cash flow in the next decade

  • Current copper production of 35 Mlbs,

C1 cash cost of $1.001

  • Higher grades coupled with 30% higher

mining rates to result in 52.5 Mlbs per year plus 1.5 Moz of silver by 2021

  • Targeting mine life to ~2030, updated mine

plan expected in Q4 2020

SANTO DOMINGO (CS 70%)

  • Fully permitted, $1.0B NPV, high IRR,

copper-iron ore-gold project with additional cobalt by-product upside3

  • 18 year mine life, district exploration potential

CORPORATE

  • Strong balance sheet
  • ~$30M of annualized cost savings
  • Exploration a key strategy to surface

additional value

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SLIDE 6

Institutional 59% Retail and Other 41%

Shareholder Composition

Institution Name % of S/O GRM Investments Ltd. 20.8% Korea Resources Corporation (KORES) 10.1% Ingalls & Snyder 9.5% Third Avenue Management 6.4% Columbia Threadneedle Investments (U.S.) 3.4%

Source: IPREO as of January 17, 2020 plus undisclosed shareholders as per Capstone’s best knowledge

Ticker TSX:CS Shares Outstanding (as at Dec 31/19) 400 million Market Cap (as at Jan 21/20) U$256 million Cash and Cash Equivalent (as at Sep 30/19) U$46 million Long Term Debt (as at Sep 30/19) U$164 million

Capstone Mining: Company Snapshot

Top Five Institutional Shareholders Own 50% of Capstone

CAPSTONE MINING (TSX:CS) • 6

17-4 17-7 17-10 18-1 18-4 18-7 18-10 19-1 19-4 19-7 19-10 20-1 $.40 $.60 $.80 $1.00 $1.20 $1.40 $1.60 $1.80 Share Price ($C) 4 8 12 Volume (millions)

Source: FactSet, Jan 22, 2020

Capstone Three YearPrice & Volume

Volume Price

Canada 50% USA 24% Asia 24% Europe 2%

Institutional Location

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SLIDE 7

The Right Management Team

CAPSTONE MINING (TSX:CS) • 7 DARREN PYLOT President & CEO Over 30 years in mining, founder of Capstone Mining, acquired Cozamin for $3M, which has delivered over $450M free cash flow since. RAMAN RANDHAWA, CPA, CA Chief Financial Officer Over 19 years mining experience, previously at Goldcorp in multiple VP positions. Successfully lead Capstone’s recent effort to cut $30M of annualized costs. BRAD MERCER, B.Sc SVP, Operations & Exploration Over 35 years experience managing mineral exploration programs. Exploration excellence has lead to 50% production growth and mine life extension at Cozamin. JERROLD ANNETT, P.Eng. VP, Strategy and Capital Markets Over 25 years of global mining and capital markets experience, previously in senior strategic roles for jr. exploration companies and Head

  • f Mining Institutional Sales at Scotiabank.

ALBERT GARCIA III, Ph.D PE VP, Projects Over 40 years of experience in engineering, mining and project management for large international capital-intensive projects in challenging locations. JASON HOWE, CPA, CA VP, Corporate Development Over 15 years in mining and 25 years in accounting and finance. Instrumental in executing Capstone’s growth strategy. WENDY KING, MBA, LLM VP, Legal, Risk & Governance and Corporate Secretary Practicing law for over 25 years as in-house counsel and private practice as international-tax specialist. ABEL GONZALEZ VARGAS Mine Manager, Cozamin Mining engineer-metallurgist with 30 years experience, previously at Grupo Mexico as general manager at different Mexico-based

  • mines. At Cozamin, he consistently leads stellar
  • perating performance while the mine is going

undergoing major expansion. MIKE WICKERSHAM Mine Manager, Pinto Valley Chemical engineer with over 35 years experience in mining and mineral processing; in a series of roles at Rio Tinto's Iron Ore Company of Canada (IOCC) in various VP and GM roles. His leadership of PV’s optimization and growth strategies will position the mine for future

  • perational excellence.
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SLIDE 8

Path for Growth

CAPSTONE MINING (TSX:CS) • 8

Near-Term Growth Low capital intensity and high IRR projects to modernize the

  • perations, resulting in higher

throughput and lower costs Future Growth PV4 expansion study to tap into

  • ne billion tonnes of Resources

currently not in Reserves1 Sustainable Cost Reductions Mine delivered ~$20 million in lower costs in 2019 Significant Free Cash Flow Tier 1 asset, generating strong free cash flow; cumulatively >$450 million since 2007 Mine Expansion On track to expand underground mining rates which will increase production to 50-55 Mlbs copper and 1.5 Moz silver In-fill and expansion drilling to extend the mine life to ~10 years, with higher grades and higher mining rates Fully Permitted High-quality, high-IRR, the only fully permitted greenfield project in Chile Improving Economics Updating NI 43-101 with lower capital requirements and better economics, plus cobalt recovery

  • pportunity

Strategic process underway, low capital commitments until Capstone right sizes or monetizes share ownership

PINTO VALLEY COZAMIN SANTO DOMINGO

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SLIDE 9

2019

Cost savings

Sustainable ~$20M per year from contractors, power and consumables costs.

2020

Mill modernization

Capital investment of $15M, with one year payback to improve mill reliability, increase throughput and

  • verall performance.

Resulting in expected throughput to ~57 ktpd in 2021 and beyond.

2020-2021

Evaluating long-term growth potential

Measured and Indicated Resource estimate1 (inclusive of Reserves) of

  • ver 1.33 billion tonnes at

0.30% copper. Assessing scenarios for potential mill expansions to 95,000+ tonnes per day.

2039+

~20 years mine life

Current mine life to 2039; total Reserve Estimate1 of 408 million tonnes grading at 0.31% copper.

Pinto Valley: An Exciting Future

CAPSTONE MINING (TSX:CS) • 9

A long-life, multi- generational asset. Currently focused on modernizing the mill and evaluating long-term growth potential beyond current mine life.

Mineral Resource Estimate as at December 31, 2018

(metric units) Mineral Resources at 0.17% TCu Cutoff (Inclusive of Mineral Reserves) Category Tonnes (million) Cu (%) Mo (%) Measured (M) 571 0.33 0.006 Indicated (I) 759 0.27 0.005 Total M + I 1,330 0.30 0.005 Inferred 146 0.24 0.005 See Appendix slide “Pinto Valley Mineral Reserve and Resource Estimate” or the Company’s 2018 Annual Information Form for full details

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SLIDE 10

Source: Bing maps and boundaries are approximated

Pinto Valley: Only Operating Mine In This Historic District

CAPSTONE MINING (TSX:CS) • 10

  • The Globe-Miami district is one of the oldest and

most productive mining districts in the United States, with its first recorded production occurring in

  • 1878. Since that time, more than 15 billion pounds
  • f copper have been produced.
  • Pinto Valley has produced more than four billion

pounds of copper since 1975.

  • Pinto Valley is currently the second largest

employer in the Globe-Miami area; total economic impact in Arizona is >$270 million per year.

  • Measured and Indicated Resource1 base of one

billion tonnes, currently not in Reserve, has the potential to create long-term sustainable benefits for multiple generations. Carlota (KGHM) Pinto Valley Miami (FCX) Copper Cities (BHP) Miami (BHP) Old Dominion (BHP)

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SLIDE 11

Low capex, high impact: 1 year payback

Modernizing PV Starting with Crushing Plant

CAPSTONE MINING (TSX:CS) • 11

The Opportunity

80% of unscheduled downtime is due to issues in the fine crushing plant and ball mill circuits

The Fix

In 2020, replace two secondary crushers and screens, two mill shells and install electrical upgrades

The Business Case

  • Higher throughput
  • Lower power and maintenance costs
  • Improved recoveries
  • $15M capital in 2020 with 1 year payback

Throughput expected to increase to ~57 ktpd by 2021 and beyond

1970 Crushing Technology secondary crusher at Pinto Valley 2020 Crushing Technology FLS Raptor 900 crusher

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SLIDE 12

COZAMIN MINE

(Acquired in 2006)

  • The mine was considered a sunset operation two

times and subsequent exploration success resulted in significant mine life extensions with high grades

  • Currently targeting a ~10 year mine life at 50%

expanded copper and silver output generating even better annual free cash flow than in the past

MINTO MINE

(Acquired in June 2005, sold in June 2019)

  • More than tripled resource and reserves
  • Nine separate discoveries on a property that was

deemed well explored

Exploration Excellence Has Delivered NAV Creation

MAJOR LEAGUE RESULTS FROM CAPSTONE’S EXPLORATION TEAM

CAPSTONE MINING (TSX:CS) • 12

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SLIDE 13

NOTE: Tax cash flows estimated using current and deferred tax expense. Included in 2007, 2009 and 2010 of $20M, $24M and $20M, respectively, are stream payments in cash and shares from WPM. *2019 cash flow is for the nine months ended September 30, 2019. Full year results will be released on February 11, 2020.

Cozamin Has Delivered Best In Class Returns

CAPSTONE MINING (TSX:CS) • 13

Cumulative free cash flow

  • f over $450M since 2007

Expansion investments Acquisition $3.19

  • Avg. Cu $/lb:

$3.15 $2.34 $3.42 $3.84 $3.66 $3.30 $3.03 $2.35 $2.27 $2.86 $2.92 $2.75 $3.05 Total invested between 2006-2008 = $52 million > *

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SLIDE 14

CAPSTONE MINING (TSX:CS) • 14 The area shown in these figures represents only 9% of the total Cozamin Mine property.

Cozamin: Growing Into An Even Better Cu-Ag Mine

Copper % * Estimated True Width (m) Silver g/t * Estimated True Width (m)

Many of the best grade and width intercepts1 are outside of the current Mineral Reserve

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SLIDE 15

2019/20 INFILL DRILLING GOAL: EXTEND MINE LIFE BY AN ADDITIONAL ~10 YEARS

Select high grade infill holes from the January 16, 2020 exploration drill results news release.

Organic Growth at Cozamin

CAPSTONE MINING (TSX:CS) • 15

Open

Inferred Resources1 as of October 24, 2018 Indicated Resources1 as

  • f October 24, 2018

Not in Resource Estimate LEGEND: Drilled holes Planned surface holes 2020 Planned UG2 holes 2020

Step-out/ Infill UG 2020

Portree claimblock

1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 5 1 6 17 18 19 20 21 22 23 24 25 26 27

S445 5.31% Cu TW 6.3m S436 6.13% Cu TW 1.7m S449 1.96% Cu TW 3.9m S443 4.95% Cu TW 1.8m U503 1.92% Cu TW 6.0m U504 2.53% Cu TW 7.1m S441 3.35% Cu TW 5.4m S437 1.94% Cu TW 19.3m S440 8.29% Cu TW 4.9m S446 5.16% Cu TW 3.4m S447 4.99% Cu TW 7.2m S444 3.31% Cu TW 11.8m S455 7.65% Cu TW 5.4m

Step-out/Infill Surface 2020

1. For full details of Mineral Resources and Mineral Reserves as of October 24, 2018 please refer to the Company’s NI 43-101 Technical Report on the Cozamin Mine, Zacatecas, Mexico published January 24, 2019 and the Company’s Annual Information Form for the year ended December 31, 2018 available on SEDAR or www.capstonemining.com. 2. UG denotes underground.

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SLIDE 16

Cities and Towns Mines Operating Ports Projected Ports

El Salvador Mine Caldera Copiapo Candelaria Tierra Amarilla Chañaral Diego de Almagro CNN Mine Manto Verde

Santo Domingo

Barquito Port Atacama Port Punta Caldera Port Punto Padrones

CHILE

Pipeline

Santo Domingo Port

Punto Totoralillo

 Permitted, large-scale, shovel-ready in a mining- friendly jurisdiction  Low altitude (~1,200m), ~100km from coast and near major infrastructure  Expected high availability of water supply from area desalination plants, also low power costs  Updated Feasibility Study expected in Q1 2020

2018 Technical Report Key Highlights1

Mine Life 17.9 years Throughput (tpd) 60,000 nominal average

Average Annual Production

First 5 Years LOM Copper 259M lbs. 134M lbs. Iron Concentrate 3.3M tonnes 4.2M tonnes Gold 34,700 oz. 17,000 oz. C1 Cash Cost2 per lb. Cu $0.47 $0.02

Economics3 (US$)

Project Capstone (70%) Initial Construction Capital $1.51B $1.06B NPV (after-tax, 8%) $1.03B $0.72B IRR (after-tax) 21.8% Payback period (after-tax) 2.8 years

Santo Domingo: A Rare First Quartile Project

CAPSTONE MINING (TSX:CS) • 16

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SLIDE 17

Pipeline Of News Flow To Fuel Outperformance

CAPSTONE MINING (TSX:CS) • 17

PINTO VALLEY

Commence modernization projects starting with fine crushing plant

SANTO DOMINGO

Strategic process update Updated NI 43-101, including recovering cobalt study results

COZAMIN

Raisebore development completed

PINTO VALLEY

PV3 permit expected for ADEQ and Dam Permit Modification

PINTO VALLEY

PV3 permit expected for Plan of Operations

Q1 2020 Q2 2020 Q3 2020

PINTO VALLEY

PV4 study results

COZAMIN

Updated reserve and resource estimate with new mine plan One-way haulage loop development completed

Q4 2020

COMPANY-WIDE TARGET

Production +20% to ~180M Ibs/year, C1 costs -10% to ~$1.70/Ib

COZAMIN

Production of 50-55 Mlbs copper and 1.5 Moz silver

2021+

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SLIDE 18

$0.00 $0.50 $1.00 $1.50 $2.00 $2.50

C1 Cash Costs (US$) 2019 Guidance4

$2.73 $4.17 $4.28 $5.37 $11.04 $14.96 $17.13 $- $2.00 $4.00 $6.00 $8.00 $10.00 $12.00 $14.00 $16.00 $18.00 Capstone Taseko Copper Mountain Hudbay Lundin Turquoise Hill Ero Copper

EV/2019 Attributable Guidance2 (US$/Cu lbs)

0.3x 0.5x 0.6x 0.7x 0.9x 1.0x 1.6x 0.0x 0.2x 0.4x 0.6x 0.8x 1.0x 1.2x 1.4x 1.6x 1.8x Turquoise Hill Capstone Taseko Copper Mountain Hudbay Lundin Ero Copper

P/NAV1

Capstone: Extraordinary Deep Value

CAPSTONE MINING (TSX:CS) • 18 Average 0.8x Average $8.53

100 200 300 400 500 600

Contained Copper Production3 (Mlb’s) 2019 Guidance

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SLIDE 19

Significant Organic Growth

  • Focused on 20% expansion to ~180 million pounds at

10% lower costs by 2021 and beyond

Time is Now for Free Cash Flow

  • Cozamin – expecting extend mine life to ~10 years and

increase output >50% to 50-55 million pounds of copper and 1.5 million ounces of silver per year

  • Pinto Valley – modernization projects to enable higher

milling rates in anticipation of improving copper markets

  • 100% unhedged copper exposure

Peer Leading Financial Position

  • Cost reduction program delivered ~$30 million
  • Lowest Net Debt to EBITDA of 1.51

2020 2021-2024

20% Organic Growth

A New Capstone

CAPSTONE MINING (TSX:CS) • 19

140 to 155 Mlbs ~180 Mlbs per year

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SLIDE 20

Why We’re Better Positioned Than Ever

1. Refer to the Company’s Management Discussion and Analysis for the three and nine months ended September 30, 2019 for full details.

Growth, Free Cash Flow, Unparalleled Leverage To Copper

1. Refer to the Company’s news release “Capstone Outlines Capital Investment Plans to Achieve 20% Production Growth by 2021” on January 22, 2020 for full details. 2. Refer to Appendix slide “Pinto Valley Mineral Reserve and Resource Estimate” at the end

  • f this presentation for full details.

3. Refer to the Company’s news release “Capstone Mining Releases Positive Technical Report and Launches a Strategic Process for Santo Domingo” on November 26, 2018 for full details.

Path for Growth

1. Refer to Appendix slide “Pinto Valley Mineral Reserve and Resource Estimate” at the end

  • f this presentation for full details.

Pinto Valley: An Exciting Future

1. Refer to Appendix slide “Pinto Valley Mineral Reserve and Resource Estimate” at the end

  • f this presentation for full details.

Pinto Valley: Only Operating Mine In This Historic District

1. Refer to Appendix slide “Pinto Valley Mineral Reserve and Resource Estimate” at the end

  • f this presentation for full details.

Cozamin: Growing Into An Even Better Cu-Ag Mine

1. Refer to the Company’s news release “Capstone Steps Out Into 6.3m of 5.3% Cu: Expansion and Infill Drilling Amongst the Best Results Ever at Cozamin” on January 16, 2020 for full details.

Santo Domingo: A Rare First Quartile Project

1. Refer to the Company’s news release “Capstone Mining Releases Positive Technical Report and Launches a Strategic Process for Santo Domingo” on November 26, 2018 for full details. 2. C1 cash costs are net of magnetite iron and gold by-product credits and selling costs and is an alternative performance measure. Refer to "Alternative Performance Measures" in the Company’s news release of November 26, 2018 for full details. 3. Metal price assumptions Cu: $3.00/lb, Fe: $80/t concentrate @ 66% Fe FOB SD, Au: $1,290/oz. Refer to the Company’s news release of November 26, 2018 for full details.

Capstone: Extraordinary Deep Value

1. Scotiabank Metals & Mining Research Daily Base Metals Comp, January 22, 2020, 8% P/NAV. 2. EV (US$) from FactSet Jan 21, 2020; Attributable Guidance from company reports. 3. Company guidance. 4. C1 is 2019 guidance except for HudBay, Lundin, Copper Mountain and Taseko (Source: Scotia 2019E from November 2019) and Nevada Copper (Technical Report for 2021).

A New Capstone

1. Refer to the Company’s Management Discussion and Analysis for the three and nine months ended September 30, 2019 for full details.

FOOTNOTES

CAPSTONE MINING (TSX:CS) • 20

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SLIDE 21

APPENDIX

CAPSTONE MINING (TSX:CS) • 21

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SLIDE 22

Capital Investments and Future Growth

Pinto Valley

  • Mill modernization to improve reliability and overall

performance, throughput expected to increase to ~57 ktpd by 2021 and beyond Cozamin

  • Expansion development of one-way ramp is on

schedule and on budget for end of 2020, upon completion, expected increase in production to 50-55 Mlbs of copper and 1.5 Moz of silver for 2021 and beyond Santo Domingo

  • Low capital expenditures for the fully permitted Santo

Domingo project in 2020 to preserve project

  • ptionality as we continue the strategic process in an

improving copper market to right size or monetize Capstone’s ownership

Pinto Valley Cozamin Santo Domingo 2020 Total Production and Costs (US$) Copper Production (million pounds) 110 – 120 30 – 35

  • 140 – 155

C1 Cash Costs2 $2.10 - $2.25 $0.95 - $1.10

  • $1.85 - $2.00

Capital Expenditures (US$ millions, rounded) Sustaining $28 $24

  • $52

Capitalized Stripping $8

  • $8

Expansionary $19 $2 $93 $30 Total Capital $55 $26 $9 $90 Exploration (US$ millions, rounded) Brownfield

  • $6
  • $6

Greenfield

  • $4

Total Exploration

  • $6
  • $10

2020 Production, Cost and Capital Guidance1

CAPSTONE MINING (TSX:CS) • 22

1. See the Company’s news release of January 22, 2020 for full details. 2. This is an alternative performance measure; please see "Alternative Performance Measures" at the beginning of this presentation. C1 cash cost per pound of payable copper produced net of by-product credits and selling costs. 3. On a 100% basis the figure is $12 million; ownership is 70% Capstone and 30% Korea Resources Corporation.

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SLIDE 23

PETER MEREDITH, CPA, CA Former Deputy Chairman and CFO of Turquoise Hill Resources and spent 31 years at Deloitte as a

  • Partner. Currently also a board member with

Ivanhoe Mines, Great Canadian Gaming Corporation and Cordoba Minerals. DALE PENIUK, CPA, CA, B.Comm Former Assurance Partner, Mining, KMPG LLP and is currently Audit Committee Chair for Lundin Mining, Argonaugt Gold and Miramont Resources. DARREN PYLOT President & CEO of Capstone Mining Corp. Over 30 years in mining, founder of Capstone Mining and Silverstone Resources. Currently also a board member with Zena Mining. RICHARD ZIMMER, MBA, P.Eng, B.Sc Over 40 years of mining and resource experience. Former President & CEO of Far West Mining, prior to that was with Teck Corporation, Teck-Cominco and Teck-Pogo. Currently also a board member with Alexco Resources and Ascot Resources. GEORGE BRACK, MBA, CFA, BA Sc Chairman of the Board Over 30 years in mining focused on exploration, corporate development and investment banking. Former Managing Director & Industry Head, Mining at Scotia Capital; President of Macquarie NA Ltd.; VP Corp Dev at Placer Dome and VP Mining at CIBC Wood Gundy. Currently also a board member with Wheaton Precious Metals and Alio Gold. ROBERT GALLAGHER, BA Sc Over 40 years of experience in developing and operating large-scale mining projects. Former President & CEO of New Gold; CEO of Peak Gold; VP Operations at Newmont Asia Pacific; as well as previously with Placer Dome. Currently also a board member with Southern Arc Minerals and Japan Gold. MIN GEOL RYU, B.Sc Eng. Has been with KORES for 25 years including as Sr. Mine Planning Manager of Boleo, Chief Rep of KORES South Africa and Team Lead of South African Exploration Team. Currently leads their Metals Team.

Board of Directors

CAPSTONE MINING (TSX:CS) • 23

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SLIDE 24

Total Global Inventories at 10 Year Lows

CAPSTONE MINING (TSX:CS) • 24

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SLIDE 25

Pinto Valley Mineral Reserve and Resource Estimate

CAPSTONE MINING (TSX:CS) • 25

Mineral Resource Estimate as at December 31, 2018

(metric units) Mineral Resources at 0.17% TCu Cutoff (Inclusive of Mineral Reserves) Contained Metal

Category Tonnes (million) Cu (%) Mo (%) Copper Metal (Mt) Molybdenum (Mt) Measured (M) 571 0.33 0.006 1.88 0.034 Indicated (I) 759 0.27 0.005 2.07 0.039 Total M + I 1,330 0.30 0.005 3.95 0.0073 Inferred 146 0.24 0.005 0.34 0.008

RESOURCE ESTIMATE NOTES: Claydon Craig, P.Eng., Superintendent of Mine Technical Services at Pinto Valley, is the Qualified Person responsible for the Pinto Valley Mineral Resources estimate. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. Mineral Resources are presented inclusive of Mineral Reserves. Mineral Resources are reported as at December 31, 2018 above a 0.17% TCu cut-off

  • grade. The economic assumptions for the reasonable prospects pit include: $3.30/lb Cu, $10.00/lb Mo, 88% Cu recovery, 50% Mo recovery, $1.50/ton mining costs, $1.50/ton G&A costs, $5.00/ton milling costs, and a pit slope of

45°. Totals may not tally due to rounding. Contained metals are reported at 100%. See Capstone’s Annual Information Form for the year ended December 31, 2018 for further information.

Mineral Reserve Estimate as at December 31, 2018

Mineral Reserve Contained Metal

Category Tonnes (million) Cu (%) Mo (%) Copper Metal (Mt) Molybdenum (Mt) Proven 255 0.33 0.006 0.84 0.016 Probable 153 0.28 0.006 0.43 0.009 Proven + Probable 408 0.31 0.006 1.27 0.025

RESERVE ESTIMATE NOTES: Claydon Craig, P.Eng., Superintendent of Mine Technical Services at Pinto Valley is the Qualified Person responsible for the Pinto Valley Mineral Reserves estimate. Economic inputs to the block model were USD$2.75/lb Cu and USD$12.50/lb Mo. Mineral Reserves are reported above 0.175% Cu cut-off grade. Summation errors due to rounding. Contained metals are reported at 100%. See Capstone’s Annual Information Form for the year ended December 31, 2018 for further information.

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SLIDE 26

Cozamin Mineral Reserve and Resource Estimate

CAPSTONE MINING (TSX:CS) • 26

Mineral Resource Estimate as at December 31, 2018

Mineral Resources (Inclusive of Mineral Reserves) Contained Metal

Category Tonnes (kt) Copper (%) Silver (g/t) Zn (%) Pb (%) Copper Metal (kt) Silver Metal (koz) Zinc Metal (kt) Lead Metal (kt) Measured (M) 407 1.24 53 1.23 0.40 5 698 5 2 Indicated (I) 16,709 1.50 44 1.25 0.27 250 23,813 208 46 Total M + I 17,116 1.49 45 1.25 0.28 255 24,506 213 47 Inferred 16,922 1.11 44 1.64 0.29 188 23,902 278 49

RESOURCE ESTIMATE NOTES: The Cozamin Mineral Resource estimate was completed by Garth Kirkham, P.Geo., FGC, Kirkham Geosystems Ltd., and an independent Qualified Person as defined by NI 43-101. The NSR formula used is based on $3.50/lb Cu, $18/oz Ag, $1.20/lb Zn, $1.00/lb Pb and metallurgical recoveries of 95% Cu, 78% Ag, 58% Zn, 40% Pb. The resulting NSR formula is Cu*65.024 + Ag*0.438 + Zn*10.755 + Pb*6.981. Mineral Resources are reported above $50/t NSR cut-off. Mineral Resources are presented inclusive of Mineral Reserves. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. Figures may not sum due to rounding. Contained metals are reported at 100%. See Capstone’s Annual Information Form for the year ended December 31, 2018 for further information.

Mineral Reserve Estimate as at December 31, 2018

Mineral Reserve Contained Metal

Category Tonnes (kt) Cu (%) Ag (g/t) Zn (%) Pb (%) Copper Metal (kt) Silver Metal Troy (koz) Zinc Metal (kt) Lead Metal (kt) Proven

  • Probable

6,050 1.58 43 0.72 0.14 96 8,293 43 8 Proven + Probable 6,050 1.58 43 0.72 0.14 96 8,293 43 8

RESERVE ESTIMATE NOTES: Tucker Jensen, P.Eng., Senior Mining Engineer at Capstone Mining Corp., is the Qualified Person for the Cozamin Mineral Reserve. Disclosure of the Cozamin Mine Mineral Reserves as of December 31, 2017 was completed using fully diluted mineable stope shapes generated by the Maptek Vulcan Mine Stope Optimizer software and estimated using the 2018 MNFW and MNV resource block models completed by Garth Kirkham, P.Geo., FGC, Kirkham Geosystems Ltd. The Reserves are based on a $50/t NSR cut-off. The NSR formula used for the Reserves was based $2.75/lb Cu, $16/lb Ag, $1.10/lb Zn, and metallurgical recoveries of 96.5% Cu, 81% Ag, 44% Zn. The resulting NSR275 formula is ($50.707*%Cu + 0.366*Ag ppm + 7.276*Zn%)*(1-NSRRoyalty%)Note that zero value is attributed to Pb due to low concentrations. Tonnage and grade estimates include dilution and recovery allowances. The NSR royalty rate applied varies between 1% and 3% depending on the mining concession. Contained metals are reported as 100%. Figures may not sum due to rounding. See Capstone’s Annual Information Form for the year ended December 31, 2018 for further information.

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SLIDE 27

Santo Domingo Mineral Reserve and Resource Estimate

CAPSTONE MINING (TSX:CS) • 27

Mineral Resource Estimate as at December 31, 2018

Mineral Resources (Inclusive of Mineral Reserves)

Category Tonnes (Mt) CuEq (%) Cu (%) Au (g/t) Fe (%) Co (ppm) Measured (M) 66 0.81 0.61 0.081 30.9 254 Indicated (I) 471 0.48 0.26 0.034 25.0 225 Total M + I 537 0.52 0.30 0.039 25.7 229 Inferred 48 0.41 0.19 0.025 23.6 197

RESOURCE ESTIMATE NOTES: Mineral Resources are reported inclusive of Mineral Reserves. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. Mineral Resources are classified according to CIM (2014)

  • guidelines. The Qualified Person for the estimates is Mr. David Rennie, P.Eng., an associate of Roscoe Postle Associates Inc. Mineral Resources for the Santo Domingo Sur, Iris, Iris Norte and Estrellita deposits have an effective date October 31, 2018.

Mineral Resources for the Santo Domingo Sur, Iris, Iris Norte, and Estrellita deposits are reported using a cut-off grade of 0.125% CuEq. CuEq grades are calculated using average long-term prices of $3.50/lb Cu, $1,300/oz Au, and $99/dmt Fe. The CuEq equation is: % Cu Equivalent = (Cu Metal Value + Au Metal Value + Fe Metal Value) / (Cu Metal Value per percent Cu). The general equation for metal value is: Metal Value = Grade * Cm * R * (Price – TCRC – Freight) * (100 – Royalty) / 100, were Cm is a constant to convert the grade of metal to metal price units, R is metallurgical recovery, and TCRC is smelter treatment charges and penalties. An assessment of Mineral Resources for the Santo Domingo Sur, Iris, Iris Norte and Estrellita deposits was performedusinga Lerchs–Grossman pit shell that has the following assumptions: pit slopes averaging 45°; mining cost of $1.90/t, processing cost of $7.27/t (including G&A cost); processing recovery of 89% copper and 79% gold; selling price of $3.50/lb copper, $1,300/oz gold and $99/dmt iron concentrate. Rounding as required by reporting guidelines may result in apparent summation differences between tonnes, grade and contained metal content. See Capstone’s Annual Information Form for the year ended December 31, 2018 for further information.

Mineral Reserve Estimate as at December 31, 2018

Mineral Reserve Contained Metal

Category Tonnes (Mt) Cu (%) Au (g/t) Fe (%) Copper (kt) Gold (koz) Magnetite Concentrate (Mt) Proven 65.4 0.61 0.08 30.9 398 169.9 8.2 Probable 326.9 0.24 0.03 27.6 768 336.8 66.9 Proven + Probable 392.3 0.30 0.04 28.2 1167 506.7 75.1

RESERVE ESTIMATE NOTES: The Mineral Reserves estimate have an effective date of November 14, 2018 and were prepared by Mr. Carlos Guzman, CMC, and employee of NCL. Mineral Reserves are reported as constrained within Measured and Indicated pit designs and supported by a mine plan featuring variable throughput rates and cut-off optimization. The pit designs and mine plan were optimized using the following economic and technical parameters: metal prices of $3.00/lb Cu, $1,290/oz Au and $100/dmt of Fe concentrate; recovery to concentrate assumptions of a maximum of 93.4% for Cu and 60.1% for Au, with magnetite concentrate recovery varying on a block-by-block basis; copper concentrate treatment charges of $80/dmt, $0.08/lb of Cu refining charges, $5.0/oz of Au refining charges, $33/wmt and $20/wmt for shipping Cu and Fe concentrates respectively; wasteminingcostof $1.75/t, mining cost of $1.75/t ore, and process and G+A costs of $7.53/t processed; average pit slope angles that range from 37.6° to 43.6°; a 2% royalty rate assumption, and an assumption of 100% mining recovery. Rounding as required by reporting guidelines may result in apparent summation differences between tonnes, grade and contained metal content. See Capstone’s Annual Information Form for the year ended December 31, 2018 for further information.

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SLIDE 28

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