Capstone Copper Announces Inclusion in the S&P/ASX 300 Index

Capstone Copper Corp. (“Capstone”, “CS” or the “Company”) (TSX: CS) (ASX: CSC) today announced that the CHESS Depositary Interests (“CDI”) of the Company will be added to the Standard & Poors (“S&P”)/ASX 300 Index by the S&P Dow Jones effective prior to ASX market opening on September 23, 2024.

John MacKenzie, Capstone’s CEO, commented, “We are very pleased to have been included in the S&P/ASX 300 Index as part of the September rebalance. Inclusion in this index recognizes the early success of our secondary listing in Australia, highlighted by our growing CDI market capitalization and robust trading liquidity on the ASX. We look forward to continuing to engage with investment analysts, institutional fund managers, and, more broadly, investors in the Asia Pacific region.”

The S&P/ASX 300 is designed to provide investors with broad exposure to the Australian equity market. The index measures up to 300 of Australia's largest securities by float-adjusted market capitalization and covers the large-cap, mid-cap, and small-cap components of the S&P/ASX Index Series.

Capstone’s CDIs commenced trading on the ASX under the ticker symbol CSC on February 2, 2024. Each CDI represents one fully paid share of common stock of Capstone Copper.

About Capstone Copper Corp.

Capstone Copper Corp. is an Americas-focused copper mining company headquartered in Vancouver, Canada. We own and operate the Pinto Valley copper mine located in Arizona, USA, the Cozamin copper-silver mine located in Zacatecas, Mexico, the Mantos Blancos copper-silver mine located in the Antofagasta region, Chile, and 70% of the Mantoverde copper-gold mine, located in the Atacama region, Chile. In addition, we own the fully permitted Santo Domingo copper-iron-gold project, located approximately 30 kilometres northeast of Mantoverde in the Atacama region, Chile, as well as a portfolio of exploration properties in the Americas.

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

Cautionary Note Regarding Forward-Looking Statements

This document 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 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 Company management's expectations or beliefs regarding future events and include, but are not limited to, statements with respect to the estimation of mineral reserves and mineral resources, the conversion of mineral resources to mineral reserves, the ability to successfully complete the strategic review process, the ability to further enhance the value of the project, the expected timing for commencement of construction of the Santo Domingo project, the future validity of the DL600, our ability to fund future exploration activities, the market for project debt, Capstone's ability to raise its equity contribution to the project, the realization of mineral reserve estimates, the timing and amount of estimated future production, costs of production, capital and construction expenditures, success of mining operations, success of mineral exploration, environmental risks, the timing of the receipt of permits, the timing and terms of a power purchase agreement, unanticipated reclamation expenses, title disputes or claims and limitations on insurance coverage. In certain cases, forward-looking statements can be identified by the use of words such as "plans", "expects" or "does not expect", "is expected", "outlook", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate", or "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 including “explore”, “potential”, “will”, "scheduled", "plan", "planned", "estimates", “estimated”, “estimate”, "projections", "projected", “await receipt” and "expected". Forward-looking statements are based on a number of assumptions which may prove incorrect, including, but not limited to, the development potential of the Santo Domingo project and current and future commodity prices and exchange rates. By their very nature forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Such factors include, among others, changes in project parameters as plans continue to be refined; future prices of commodities; possible variations in mineral resources and reserves, grade or recovery rates; accidents; dependence on key personnel; labour pool constraints; labour disputes; availability of infrastructure required for the development of mining projects; delays in obtaining governmental approvals, financing or in the completion of development or construction activities; objections by the communities or environmental lobby of the Santo Domingo mine and associated infrastructure 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 management's discussion and analysis of those statements, all of which are filed and available for review on SEDAR+ at www.sedarplus.ca. Although the Company has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, readers should not place undue reliance on forward looking statements.

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