Mr. Daniel Sampieri reports

CAPSTONE COPPER TO RELEASE SECOND QUARTER RESULTS ON JULY 31, 2025

Capstone Copper Corp. will release its second quarter 2025 results on Thursday, July 31, 2025, after market close. The announcement will be followed by an investor conference call the same day at 5 p.m. Eastern Time/2 p.m. Pacific Time (Friday, Aug. 1, 2025, at 7 a.m. Australian Eastern Standard Time).

Q2 2025 results webcast and conference call details

Timing:  July 31, 2025, at 5 p.m. ET/2 p.m. PT/Aug. 1, 2025, at 7 a.m. AEST

A webcast will be available.

To connect by phone:  To instantly join the conference call by phone, please 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 Aug. 7, 2025.

Replay dial-in numbers

Toronto:  1-289-819-1450

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

Code:  61642 followed by the number sign

After the replay expiration, an audio file will be available on Capstone's website at events and presentations.

About Capstone Copper Corp.

Capstone Copper is an America-focused copper mining company headquartered in Vancouver, Canada. It owns and operates the Pinto Valley copper mine located in Arizona, United States, the Cozamin copper-silver mine located in Zacatecas, Mexico, the Mantos Blancos copper-silver mine located in the Antofagasta region, Chile, and 70 per cent of the Mantoverde copper-gold mine, located in the Atacama region, Chile. In addition, it owns 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 its portfolio of assets. The company focuses on profitability and disciplined capital allocation to surface stakeholder value. It is committed to creating a positive impact in the lives of people and local communities, while delivering compelling returns to investors by responsibly producing copper to meet the world's growing needs.