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Capstone Copper’S Mantos Blancos and Mantoverde Mines Join the Copper Mark

Corporate Updates

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August 25, 2022

CAPSTONE COPPER’S MANTOS BLANCOS AND MANTOVERDE MINES JOIN THE

COPPER MARK

Vancouver, British Columbia – Capstone Copper Corp. ("Capstone" or the "Company") (TSX: CS) has

committed to the Copper Mark at its Mantos Blancos and Mantoverde operations in Chile. The Copper Mark

is an assurance framework to promote responsible production practices and demonstrate the industry’s

commitment to the United Nations Sustainable Development Goals. Within one year, Mantos Blancos and

Mantoverde will be assessed and independently verified against the Copper Mark’s 32 responsible production

criteria, including environmental management, greenhouse gas emissions, human rights, community health,

safety and development, and governance.

John MacKenzie, CEO of Capstone commented, “I am proud to share that our Mantos Blancos and

Mantoverde operations have joined the Copper Mark framework, reaffirming our commitment to continually

pursue best practices based on international standards for responsible mining. Copper is essential to a low -

carbon future, and so it is incumbent upon us to ensure that we supply this critical natural resource in as

sustainable manner as possible.”

Michèle Brülhart, Executive Director of the Copper Mark said, “As the world’s leading copper producing

country, it is vital that production in Chile is conducted responsibly. That is why we are pleased to welcome

Capstone Copper’s Mantos Blancos and Mantoverde operations in Chile to the Copper Mark. We will be

working with these sites through the Copper Mark framework to support their commitment to provide

responsibly produced copper and accelerate the clean energy transition.”

Joining the Copper Mark is one of the ways Capstone is embedding sustainability into its growth strategy.

More information about Capstone’s performance can be found in its sustainability reports available here.

ABOUT THE COPPER MARK

The Copper Mark is a new assurance framework to promote responsible practices and demonstrate the

copper industry’s contribution to the United Nations Sustainable Development Goals. The Copper Mark uses

a rigorous site-level assessment process to independently verify whether individual copper producing sites

have responsible production practices.

The Copper Mark already covers two of the largest copper mines in the world, five producers in the biggest

copper producing region in the world, and six of the ten largest companies producing copper. Over 20% of

global copper is now produced by Copper Mark-assured sites.

The Copper Mark is built on a genuine commitment of the copper industry to res ponsible production as we

aim to mitigate the environmental and social impact of the copper industry, and positively contribute to

sustainable development goals and the green transition. The Copper Mark framework involves a robust three-

year re-evaluation process at site-level for participants. Participants commit to continual improvement, building

the management systems necessary to ensure ongoing legal compliance.

https://coppermark.org/

ABOUT CAPSTONE COPPER CORP.

Capstone Copper Corp. is an Americas -focused copper mining company headquartered in Vancouver,

Canada. Capstone owns and operates the Pinto Valley copper mine in Arizona, USA, the Cozamin copper -

silver mine in Zacatecas, Mexico, the Mantos Blancos copper -silver mine in the Antofagasta region, Chile,

and 70% of the Mantoverde copper -gold mine, located in the Atacama region, Chile. In addition, Capstone

NEWS RELEASE

TSX:CS ● capstonecopper.com

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owns the fully permitted Santo Domingo copper -iron-gold project, located approximately 30 km northeast of

Mantoverde in the Atacama region, Chile, and a portfolio of exploration properties in the Americas.

Capstone Copper’s strategy is to unlock transformational copper production growth while executing cost and

operational improvements through innovation, optimization and safe and responsible production throughout

our portfolio of assets. We focus on profitability and disciplined capital allocation to surface stakeholder value.

We are committed to creating a positive impact in the lives of our people and local communities while delivering

compelling returns to investors by sustainably producing copper to meet the world’s growing needs.

Further information is available at www.capstonecopper.com

CONTACT INFORMATION

Jerrold Annett, SVP, Strategy and Capital Markets

647-273-7351

[email protected]

Kettina Cordero, Director Investor Relations & Communications

604-262-9794

[email protected]

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

Capstone Copper Corp. (the “Company”) cautions readers regarding forward-looking statements found in this

document (including the documents incorporated by reference herein) and in any other statement made by,

or on the behalf of the Company. Except for statements of historical fact, information contained in this news

release and the documents incorporated by reference herein, constitutes “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”).

Forward-looking information and forward-looking statements are often, but not always, identified by the use of

words such as “seek”, “anticipate”, “plan”, “continue”, “planned”, “expect”, “project”, “predict”, “potential”,

“targeting”, “intends”, “believe”, and similar expressions, or describes a “goal”, or variation of such words and

phrases or states that certain actions, events or results “may”, “should”, “could”, “would”, “might” or “will” be

taken, occur or be achieved.

We caution you that the foregoing list of important factors and assumptions is not exhaustive. Other events or

circumstances could cause our actual results to differ materially from those estimated or projected and

expressed in this report including without limitation, those referred to in the Company’s Annual Information

Form and in the Company’s interim and annual financial statements and MD&A, 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 could

cause our actual results, performance or achievements not to be as anticipated, estimated or intended. There

can be no assurance that our for ward-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 and investors should not place undue reliance on forward- looking statements. The Company does

not intend to update forward-looking statements, except as required by law.