Mr. Jerrold Annett reports

CAPSTONE COPPER AND ORION ANNOUNCE CLOSING OF C$431 MILLION BOUGHT DEAL

Capstone Copper Corp. and Orion Fund JV Ltd., Orion Mine Finance Fund II LP and Orion Mine Finance (Master) Fund I-A LP (collectively, Orion or the selling shareholders) have closed the previously announced bought deal offering of common shares of Capstone by a syndicate of underwriters co-led by RBC Capital Markets, National Bank Financial Inc. and Scotiabank, as joint bookrunners, and including BMO Capital Markets, Canaccord Genuity Corp. and CIBC World Markets Inc. Pursuant to the offering, the underwriters purchased, on a bought deal basis from the company and Orion, a total of 68,448,000 common shares at a price of $6.30 per common share, which included the exercise in full of the underwriters' overallotment option of 8,928,000 common shares from the company, for aggregate gross proceeds under the offering of $431,222,400.

In connection with the offering, 56,548,000 common shares were issued by the company for gross proceeds to the company of $356,252,400 and 11.9 million were sold by Orion for gross proceeds to Orion of $74.97-million. The company did not receive any proceeds from the secondary sale of common shares by Orion.

The net proceeds of the offering received by Capstone will be used: (i) to advance near-term growth initiatives in Chile, notably the Mantoverde optimized project and Santo Domingo detailed engineering; (ii) to advance expansionary exploration programs; and (iii) for general corporate and working capital purposes to provide additional balance sheet flexibility, all as further described in the prospectus supplement (as defined below).

The offering was made by way of a prospectus supplement dated Feb. 5, 2024, to the company's short form base shelf prospectus dated March 1, 2023, in all of the provinces and territories of Canada (other than Quebec) and offered in the United States to qualified institutional buyers pursuant to Rule 144A under the United States Securities Act of 1933, as amended, and in those other jurisdictions outside Canada and the United States pursuant to exemptions from prospectus and registration requirements.

As part of the offering, Orion has agreed, subject to certain limited exceptions, not to sell any common shares or other securities of Capstone for a period of 90 days from the closing of the offering. The company has also agreed, subject to certain limited exceptions, not to issue any common shares or other securities of Capstone for a period of 90 days from the closing of the offering.

The 11.9 million common shares sold by the selling shareholders in the offering represented approximately 1.7 per cent of the issued and outstanding common shares before giving effect to the offering. Prior to the offering, the selling shareholders beneficially owned an aggregate of 164,836,179 common shares, representing approximately 23.7 per cent of the company's issued and outstanding common shares, on a non-diluted basis. Following the closing of the offering, the selling shareholders, in the aggregate, beneficially own 152,936,179 common shares, representing approximately 20.3 per cent of the outstanding common shares, on a non-diluted basis. The common shares were disposed of by the selling shareholders as a result of investment considerations, including price, market conditions, availability of funds, evaluation of alternative investments and other factors. Each selling shareholder may, depending on market and other conditions, increase or decrease its beneficial ownership, control or direction over securities of Capstone.

This news release is issued pursuant to the early warning requirements of applicable Canadian securities laws which also requires an early warning report to be filed on SEDAR+ containing additional information with respect to the foregoing matters. For inquires or a copy of the related early warning report in respect of the selling shareholders, please contact David Blassberger by telephone at 212-596-3491, or visit SEDAR+. The selling shareholders' head offices are located at 1 Victoria St., seventh floor, Hamilton, HM 11, Bermuda.

About Capstone Copper Corp.

Capstone Copper is an Americas-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.

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