Mr. Daniel Sampieri reports

CAPSTONE COPPER TO RELEASE SECOND QUARTER RESULTS ON JULY 30, 2026

Capstone Copper Corp. will release its 2026 second quarter (Q2) results on Thursday, July 30, 2026, after the market close. The release will be followed by an investor conference call the same day at 5 p.m. Eastern Time (2 p.m. Pacific Time) (Friday, July 31, 2026, 7 a.m. Australian Eastern Time).

Q2 2026 results webcast and conference call details

Timing:  July 30, 2026, 5 p.m. ET (2 p.m. PT) (July 31, 2026, 7 a.m. AET)

Webcast:  A webcast of the conference call will be available.

To connect by phone:  To instantly join the conference call by phone, register on-line. You can also dial direct to be entered to the call by the operator (Toronto at 1-437-900-0527; Australia at 61-280-171-385; North America toll-free at 1-888-510-2154).

An audio replay of the conference call will be available until Aug. 6, 2026.

Replay dial-in numbers:  Toronto at 1-289-819-1450; North America toll-free at 1-888-660-6345; code 81115 followed by the pound key

After the replay expiration, an audio file will be available on Capstone's website. Further information is available on the company's website.

About Capstone Copper Corp.

Capstone Copper is an Americas-focused copper mining company headquartered in Vancouver, Canada. Capstone's operating portfolio of assets includes the Pinto Valley copper mine, located in Arizona, U.S., the Cozamin copper-silver mine, located in Zacatecas, Mexico, the Mantos Blancos copper-silver mine, located in the Antofagasta region, Chile, and the Mantoverde copper-gold mine, located in the Atacama region, Chile. Capstone's growth pipeline includes the fully permitted Santo Domingo copper-iron-gold project, located approximately 35 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. Capstone Copper is committed to creating a positive impact in the lives of its people and local communities, while delivering compelling returns to investors by responsibly producing copper to meet the world's growing needs.