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Capstone Copper to Release First Quarter Results on

Financials

1

April 7, 2025

Capstone Copper to Release First Quarter Results on

May 1, 2025

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

(ASX:CSC) will release its 2025 first quarter (“Q1 2025”) results on Thursday, May 1, 2025 after market close.

The announcement will be followed by an investor conference call the same day at 5:00pm Eastern Time /

2:00pm Pacific Time (Friday, May 2, 2025, 7:00am Australian Eastern Standard Time).

Q1 2025 Results Webcast and Conference Call Details

Timing: May 1, 2025, 5:00 pm ET / 2:00 pm PT / May 2, 2025, 7:00 am AEST

Conference call webcast link: https://app.webinar.net/jGyEXLyoJAV

To connect by phone:

To instantly join the conference call by phone, please use the following URL https://emportal.ink/4c5DC21

to easily register yourself and be connected into the conference call automatically.

You can also dial direct to be entered to the call by the operator:

Toronto: 1-437-900-0527

Australia: 61-280-171-385

North America toll free: 1-888-510-2154

An audio replay of the conference call will be available until May 8, 2025.

Replay Dial-in Numbers

Toronto: 1-289-819-1450

North America toll free: 1-888-660-6345

Code: 89798#

After the replay expiration, an audio file will be available on Capstone’s website at Capstone Copper - Events

and Presentations. Further information is available at www.capstonecopper.com.

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 prof itability 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 responsibly producing copper to meet the

world’s growing needs.

Further information is available at www.capstonecopper.com

NEWS RELEASE

TSX:CS ● ASX:CSC ● capstonecopper.com

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Contact Information

Daniel Sampieri, Vice President, Investor Relations

437-788-1767

[email protected]

Michael Slifirski, Director, Investor Relations, APAC Region

61-412-251-818

[email protected]

Claire Stirling, Manager, Investor Relations

416-831-8908

[email protected]