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A NEW CAPSTONE FEBRUARY 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

FEBRUARY 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, in

addition see the Company’s news release of February 19, 2020. 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

Capstone Mining: Prudent Growth and Lower Costs

CAPSTONE MINING (TSX:CS) • 3

To build on 20% copper production growth and 10% lower costs by 2021 with a multi-asset portfolio to generate strong cash flows in all price environments Strong balance sheet to fund low-risk brownfield expansions and greenfield

  • ptionality

To surface stakeholder value through exploration and

  • perational excellence

Positioning to be optimized in time for higher copper prices PV3 Optimization Study: series of low capital, quick payback projects to debottleneck operational performance;10% production growth with 10% lower costs by 2021; further growth possible by 2022 PV4 Expansion Study: targeting 100,000+ tpd Low cost mine generating free cash flow at any copper price On track to deliver 50% production growth by 2021: 50-55 Mlbs copper and 1.5 Moz silver post-expansion Infill and step-out drilling to extend mine life up to 2030; to date results pointing to higher grades and wider intercepts Top quartile, fully-permitted project in Chile; Cu-Fe-Au project with US$1.0 billion NPV8% and 2.8 yr payback 2020 Cobalt PEA Opportunity pointing to US$1.7 billion NPV8%; robust case to build a low cost, vertically integrated battery-grade cobalt business in Chile Strategic process in place, to right-size or monetize Capstone’s ownership

SANTO DOMINGO2 PINTO VALLEY1 COZAMIN STRATEGY

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SLIDE 4

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

  • $27.5 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) • 4

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SLIDE 5

Why We’re Better Positioned Than Ever

CAPSTONE MINING (TSX:CS) • 5

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/or

extensions to mine life

  • Santo Domingo provides transformational growth opportunity

Cost Structure

  • Sustainable cost reduction1 program eliminated $27.5M from the

business; $15.0M 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 1.561

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

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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 Feb 20/20) US$200 million Cash and Cash Equivalent (as at Dec 31/19) US$44 million Long Term Debt (as at Dec 310/19) US$210 million

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, Feb 21, 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 & SVP 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. JASON HOWE, CPA, CA SVP, 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 SVP, Legal, Risk & Governance and Corporate Secretary Practicing law for over 25 years as in-house counsel and private practice as international-tax specialist. 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. 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

Source: Bing maps and boundaries are approximated

Pinto Valley: Only Operating Mine In This Historic District

CAPSTONE MINING (TSX:CS) • 8

  • 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 9

2019

Cost savings

Sustainable $15M per year from contractors, power and consumables costs.

2020

PV3 Optimization

Phase 1: capital investment

  • f $15M, with one year

payback to improve mill reliability, increase throughput and overall

  • performance. Resulting in

expected 10% production growth and 10% lower costs by 2021 with upside by 2022.

2020

PV4 Expansion

Evaluating long-term growth potential of Measured and Indicated Resource estimate1 (inclusive of Reserves) of

  • ver 1.33 billion tonnes at

0.30% copper. PV4 Expansion evaluating scenarios for potential expansions to 100,000+ 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

  • ptimization 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

10 20 30 40 50 60 70 80 Q1'19 Q2'19 Q3'19 Q4'19 2020E* 2021E* 2022+E*

Tonnes per day (‘000) Average daily throughput*

Phase 1: 2020

  • Installation of secondary crushers, screen decks

and ball mill shells

  • $15M capital project, one-year payback
  • Expected result: 10% Growth to 130M Ibs and

10% Lower C1 Costs to $1.90/Ib by 2021

Phase 2: 2021+

  • In Dec 2019, tested operational limits and

pushed throughput to an average of ~63 ktpd, setting an all-time daily record of ~70 ktpd

  • Potential projects include improved blast

fragmentation, increased fine ore storage capacity, new tertiary crushers and screens, Verti-mills for added grinding capacity, concentrate filtration and handling modifications, increased tailings capacity

  • Study results will be released H2 2020, projects

subject to capital approvals

Potential**

*2020E, 2021E and 2022+E from Company estimates, subject to change. Refer to the Company’s news release of February 11, 2020 for more details. ** Potential estimates only, subject to results of PV Optimization analysis and study results, expected in H2 2020.

PV3 Optimization1: Low Capex, Quick Payback Projects

CAPSTONE MINING (TSX:CS) • 10

PV3 Optimization

New secondary crusher and ball mill shells, ~56-57 ktpd

2019 monthly average All-time record of 70,334 tpd achieved on Dec 21st 18 days in December >60 ktpd All permits are in place to

  • perate

within this targeted range

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SLIDE 11

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.

Cozamin Has Delivered Best In Class Returns

CAPSTONE MINING (TSX:CS) • 11

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 $2.76 $3.05 Total invested between 2006-2008 = $52 million

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SLIDE 12

Target Area to upgrade to Indicated Resources Current Reserve Boundary One-way Ramp Remainder Ventilation Raisebore

*Looking NE*

San Roberto Shaft

Hoisting 1800 TPD Hauling 1250 TPD

Lowest Level of Reserves (-952m) Bottom of Hoist (-458m) Bottom of Hypothetical Expansion (-575m) Lowest Haulage Level (-736m) Portal Elevation (-0m) Top of Hypothetical Expansion (-225m) Calicanto Ramp Guadalupana Ramp Footwall Zone Ramp San Jose Ramp

One-way Ramp Connector Expected completion Dec 2020

A Look at Cozamin in 2018 Before 200 Hole Drill Program

Total Mined in MNFWZ (up to YE 2018) Tonnes: 2,777,202 @ Cu 1.94% Reserve Remaining in MNFWZ (Opening balance 2019) Tonnes: 5,047,485 @ Cu 1.77%

Portree Claim

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SLIDE 13

CAPSTONE MINING (TSX:CS) • 13 Ventilation Raisebore

Lowest Level of Reserves (-952m) Calicanto Ramp Guadalupana Ramp Footwall Zone Ramp San Jose Ramp Portree Claim San Roberto Shaft Top of Hypothetical Expansion (-225m) Bottom of Hoist (-458m) Bottom of Hypothetical Expansion (-575m) Lowest Haulage Level (-736m)

DDH Pierce Point (after Oct-2018 MRMR) Target Area to upgrade to Indicated Resources Current Reserve Boundary One-way Ramp Remainder

Hoisting 1800 TPD Hauling 1980 TPD

U504 2.53% Cu TW 7.1m S446 5.16% Cu TW 3.4m S444 3.31% Cu TW 11.8m S447 4.99% Cu TW 7.2m S440 8.29% Cu TW 4.9m S455 7.65% Cu TW 5.4m S445 5.31% Cu TW 6.3m

One-way Ramp Connector Expected completion Dec 2020

Portal Elevation (-0m)

S443 4.95% Cu TW 1.8m S436 6.13% Cu TW 1.7m S437 1.94% Cu TW 19.3m S441 3.35% Cu TW 5.4m

*Looking NE*

Cozamin Today Following the Release of 150/200 Holes

Total Mined in MNFWZ (up to YE 2018) Tonnes: 2,777,202 @ Cu 1.94% Reserve Remaining in MNFWZ (Opening balance 2019) Tonnes: 5,047,485 @ Cu 1.77% From MNSFW Mined in 2019 820,292t @ Cu 2.00%

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SLIDE 14
  • Received all critical permits to start construction

including approved mine closure plan

  • Base Case1 Cu-Fe-Au US$1.51B capex; US$1.03B NPV8%
  • Payback period (after-tax): 2.8 years
  • PEA Cobalt1 Opportunity, incremental US$0.67B; potential to

add additional US$0.63B to NPV8%

  • Payback period (after-tax): 3.5 years
  • Simple flowsheet using a series of conventional metallurgical steps

to achieve 78% cobalt recovery and low costs

  • 10.4 million pounds of cobalt per year LOM in the form
  • f 22,600 tonnes per year of battery-grade cobalt sulfate
  • -$4.11 per pound LOM net of by-product sulfuric acid would be

amongst one of the lowest cost cobalt producers globally

  • Potential to improve project economics with infrastructure

sharing

SANTO DOMINGO

A Rare First Quartile Project

CAPSTONE MINING (TSX:CS) • 14

Opportunity to Build a Low Cost, Vertically Integrated Cobalt Business in Chile

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SLIDE 15

Source: RBC Capital Markets

Santo Domingo: Well-Positioned on the Global AISC Curve

CAPSTONE MINING (TSX:CS) • 15

2020E Global AISC Curve1 – Wood Mackenzie (US$/lb Cu and US$/lb CuEq)2 First Quartile Second Quartile Third Quartile Fourth Quartile

Copper Spot Price: $2.85/lb

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SLIDE 16

Chart source: RBC Capital Markets (RBC Source: Wood Mackenzie, RBC database and company disclosure)

  • Projects shown on 100% basis; metrics unavailable for NuevaUnión (Newmont/Teck)
  • Pebble metrics based on a 2011 PEA that the company recognizes as out-of-date; a more recent technical report was filed in late 2017, but does not provide updated cost,

production and profitability metrics 1. Profitability calculated as after-tax NPV divided by sum of initial capex and expansion capex 2. Based on adjusted Wood Mackenzie Model (assumes copper price of $3.30/lb and gold price of $1,350/oz)

Santo Domingo Boasts Robust Economic Metrics

Profitability Index, After-Tax IRR and After-Tax NPV Benchmarking

Bubble size denotes after-tax NPV (US$bn)

$2.0 $0.5 $1.5

PEA Pre-Feasibility Feasibility Acquired CAPSTONE MINING (TSX:CS) • 16

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SLIDE 17

Pipeline Of News Flow

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 Final EIS/Draft Record of Decision expected from USFS

PINTO VALLEY

PV3 permit expected for Plan of Operations PV3 Optimization study results of low-capital, quick-payback projects to execute on, to maximize existing mill PV4 Expansion study results

COZAMIN

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

Q1 2020 Q2 2020 H2 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

$- $2.00 $4.00 $6.00 $8.00 $10.00 $12.00 $14.00 $16.00 Capstone Taseko Copper Mountain Hudbay Lundin Turquoise Hill Ero Copper

EV/2020 Guidance2 (US$/Cu lbs)

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

2019A C1 Cash Costs4 (US$)

(2019A except where otherwise noted)

0.25x 0.41x 0.45x 0.53x 0.92x 0.97x 1.46x 0.00x 0.20x 0.40x 0.60x 0.80x 1.00x 1.20x 1.40x 1.60x Turquoise Hill Capstone Taseko Copper Mountain Hudbay Lundin Ero Copper

P/NAV1

Capstone: Extraordinary Deep Value

CAPSTONE MINING (TSX:CS) • 18 Average 0.71x Average $7.06

100 200 300 400 500 600

Contained Copper Production3 (Mlb’s) 2020 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

  • Santo Domingo – rare, top quartile project that could

provide transformational growth

  • 100% unhedged copper exposure

Peer Leading Financial Position

  • Cost reduction program delivered $27.5 million
  • Lowest Net Debt to EBITDA of 1.561

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

Capstone Mining: Prudent Growth and Lower Costs 1. Refer to the Company’s news release “Capstone Beats 2019 Cost Guidance, Commences PV3 Optimization Study” on February 11, 2020 for full details. 2. Refer to the Company’s news release “Capstone Presents a Robust Cobalt Production Option to the Santo Domingo 2019 Technical Report With a 2020 Preliminary Economic Assessment” on February 19, 2020 for full details. Why We’re Better Positioned Than Ever 1. Refer to the Company’s Management Discussion and Analysis for the year ended December 31, 2019 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 of this presentation and the Company’s 2018 Annual Information Form for full details. Pinto Valley: An Exciting Future 1. Refer to Appendix slide “Pinto Valley Mineral Reserve and Resource Estimate” at the end of this presentation and the Company’s 2018 Annual Information Form for full details. PV3 Optimization: Low Capex, Quick Payback Projects 1. Refer to the Company’s news release “Capstone Beats 2019 Cost Guidance, Commences PV3 Optimization Study” on February 11, 2020 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. A Rare First Quartile Project 1. Refer to the Company’s news release “Capstone Presents a Robust Cobalt Production Option to the Santo Domingo 2019 Technical Report With a 2020 Preliminary Economic Assessment” on February 19, 2020 for full details. Santo Domingo: Well-Positioned on the Global AISC Curve 1. Source: RBC Capital Markets (RBC source: Wood Mackenzie, Bloomberg and company disclosure) 2. Wood Mackenzie 2020E cost curves calculated using the composite method (applies by- product costs when the proportion of gold net revenue is greater than 65% and applies co-product costs when the proportion of gold net revenue is less than 65%) Capstone: Extraordinary Deep Value 1. Scotiabank Metals & Mining Research Daily Base Metals Comp, February 20, 2020, 8% P/NAV. 2. EV (US$) from FactSet Jan 21, 2020; Attributable Guidance from company reports. 3. Company guidance. 4. Company reports. A New Capstone 1. Refer to the Company’s Management Discussion and Analysis for the year ended December 31, 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

$44 Million

Cash and cash equivalents*

$103 Million

Rolling 12-month Adjusted EBITDA4 to Dec 31/19

$120 Million

Total net cash repayments to long-term debt since Jan 1/17*

1.56:1

Net debt4/EBITDA4 OPERATIONAL OVERVIEW Q4 2019 2019

Copper production1 (million pounds) 35.4 153.4 Copper sales1 (million pounds) 40.3 152.4 Realized copper price1 ($/lb.) $2.77 $2.71

FINANCIAL OVERVIEW (US$ millions) Q4 2019 2019

Revenue from continuing operations2 113.6 418.7 Net (loss) income 13.4 (16.2) Adjusted net (loss) income3,4 (7.8) (6.0) Adjusted EBITDA from continuing operations2,3,4 22.5 102.5 Cash flow from operating activities2 22.1 92.9 Operating cash flow before changes in working capital2,4 20.3 79.8

*Refer to the Company’s Consolidated Financial Statements and MD&A for the year ended December 31, 2019 for full details.

  • 1. For continuing operations. The Minto mine was placed on care and maintenance in Q4 2018 and was considered a discontinued operation under IFRS 5 up

until the date of sale (June 3, 2019).

  • 2. In accordance with IFRS 5, Minto’s results are excluded from revenue but included within cash flow amounts in both the current and comparative period. The

Minto mine was sold on June 3, 2019.

  • 3. Certain prior period amounts have been restated to conform with current period classification.
  • 4. This is an Alternative Performance Measure; refer to the Company’s MD&A for the year ended December 31, 2019 for full details.

Q4 2019 and 2019 Financial Results*

CAPSTONE MINING (TSX:CS) • 23

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SLIDE 24

$- $2 $4 $6 $8 $10 $12 $14 $16 $18 $20 2018 2019 2020E* US$ million G&A excl. depreciation

  • Corp. office depreciation (non-cash)

Refer to the Company’s Annual Audited Financial Statements and MD&A for the year ended December 31, 2019 for full details. *2020E are Company internal estimates, subject to change.

Achieved $27.5M In Annualized Cost Reductions

Pinto Valley Property Costs General & Administrative Costs

CAPSTONE MINING (TSX:CS) • 24 $150 $160 $170 $180 $190 $200 $210 $220 $230 $240 $250 2018 2019 2020E* US$ million

Decreased site operating costs, from 2018 as a baseline, of approximately $0.80 per tonne milled Areas of cost savings include $3.5M related to new revolver terms and improved cash management, $4M from downsizing corporate administration and $5M from disposition of Minto

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SLIDE 25

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. SEUNGWAN SHON, M.Sc Geology Has been with KORES since 2001 and currently leads their Metals Team, managing overseas copper projects. Has held numerous positions, including Mine Manager of Boleo Mine,

  • Sr. Manager of KORES Corporate Partnership Team and Sr.

Manager of the Exploration Team for Nonmetal Mineral Deposits in South Korea. 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. 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.

Board of Directors

CAPSTONE MINING (TSX:CS) • 25

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SLIDE 26

Total Global Inventories Low Despite Recent Uptick

CAPSTONE MINING (TSX:CS) • 26

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SLIDE 27

Low capex, high impact: 1 year payback

Modernizing PV Starting with Crushing Plant

CAPSTONE MINING (TSX:CS) • 27

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 28

Pinto Valley Mineral Reserve and Resource Estimate

CAPSTONE MINING (TSX:CS) • 28

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 29

Cozamin Mineral Reserve and Resource Estimate

CAPSTONE MINING (TSX:CS) • 29

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 30

Mineral Reserve Estimate as at November 14, 2018

Ore Grade Contained Metal Reserve Category Ore (Mt) Cu (%) Fe (%) Au (g/t) Cu (Mlbs) Fe Conc. (Mt) Au (koz) Proven Reserves 65.4 0.61 30.9 0.08 878.5 8.2 169.9 Probable Reserves 326.9 0.24 27.6 0.03 1,694.2 66.9 336.8 Total Reserves 392.3 0.30 28.2 0.04 2,572.7 75.1 506.7

MINERAL RESERVE ESTIMATE NOTES: 1. Mineral Reserves have an effective date of 14 November 2018 and were prepared by Mr. Carlos Guzman, CMC, an employee of NCL. 2. Mineral Reserves are reported as constrained within Measured and Indicated pit designs and are supported by a mine plan featuring variable throughput rates and cut-off optimization. The pit designs and mine plan were

  • ptimized using the following economic and technical parameters: metal prices of US$3.00/lb Cu, US$1,290/oz Au, and US$100/dmt of Fe concentrate; average recovery to concentrate is 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 US$80/dmt, US$0.08/lb of copper refining charges, US$5.0/oz of gold refining charges, US$33/wet metric tonnes (“wmt”) and US$20/wmt for shipping copper and iron concentrates respectively; waste mining cost of $1.75/t, mining cost of US$1.75/t ore, and process and G&A costs of US$7.53/t processed; average pit slope angles that range from 37.6º to 43.6º; a 2% royalty rate assumption, and an assumption of 100% mining recovery. 3. Rounding as required by reporting guidelines may result in apparent summation differences between tonnes, grade and contained metal content. 4. Tonnage measurements are in metric units. Copper and iron grades are reported as percentages, gold as grams per tonne. Contained gold ounces are reported as troy ounces, contained copper as million pounds and contained iron as million metric tonnes.

Santo Domingo Mineral Reserve Estimate

CAPSTONE MINING (TSX:CS) • 30

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SLIDE 31

Mineral Resource Estimate as at February 13, 2020

Category Deposit Mt CuEq (%) Cu (%) Au (g/t) Fe (%) S (%) Co (ppm) Measured 66 0.81 0.61 0.081 30.9 2.3 254 Indicated SDS/IN 416 0.49 0.24 0.033 26.4 2.2 239 Estrellita 55 0.40 0.38 0.039 13.7 0.0 125 Sub-Total 471 0.48 0.26 0.034 25.0 1.9 225 Total Measured and Indicated 537 0.52 0.30 0.039 25.7 2.0 229 Inferred SDS/IN 42 0.42 0.18 0.024 25.0 2.4 208 Estrellita 5 0.32 0.31 0.030 12.3 0.0 108 Total Inferred 48 0.41 0.19 0.025 23.6 2.2 197

MINERAL RESOURCE ESTIMATE NOTES:

  • 1. Mineral Resources are classified according to CIM (2014) definition standards.
  • 2. Mineral Resources are reported inclusive of Mineral Reserves. Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability.
  • 3. The Qualified Person for the estimates is Mr. David Rennie, P. Eng., an associate of Roscoe Postle Associates Inc.
  • 4. Mineral Resources for the Santo Domingo Sur, Iris, Iris Norte, and Estrellita deposits have an effective date of 13 February 2020.
  • 5. 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 US$3.50/lb Cu, US$1,300/oz Au, and US$99/dmt Fe conc.

  • 6. Only copper, gold, and iron were recognized in the CuEq calculation.
  • 7. Mineral Resources are constrained by preliminary pit shells derived using a Lerchs–Grossmann algorithm and the following assumptions: pit slopes averaging 45º;

mining cost of US$1.90/t, processing cost of US$7.27/t (including G&A cost); processing recovery of 89% copper and 79% gold; and metal prices of US$3.50/lb Cu, US$1,300/oz Au and US$99/dmt iron concentrate.

  • 8. Rounding as required by reporting guidelines may result in apparent summation differences between tonnes, grade and contained metal content.
  • 9. Tonnage measurements are in metric units. Copper (“Cu”), iron (“Fe”) and sulfur (“S”) are reported as percentages, gold (“Au”) as grams per tonne and cobalt (“Co”)

parts per million.

Santo Domingo Mineral Resource Estimate

CAPSTONE MINING (TSX:CS) • 31

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GENERAL INQUIRES Capstone Mining Corp. Suite 2100 – 510 West Georgia Street Vancouver, BC V6B 0M3  www.capstonemining.com  info@capstonemining.com  1-604-684-8894  1-866-684-8894 (N.A. toll free) MEDIA AND INVESTOR INQUIRIES Jerrold Annett Vice President, Strategy & Capital Markets Suite 2700 – 161 Bay Street Toronto, ON M5J 2S1  1-416-572-2272 Virginia Morgan Manager, Investor Relations & Communications Suite 2100 – 510 West Georgia Street Vancouver, BC V6B 0M3  604-674-2268  info@capstonemining.com

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