Capstone Copper Unlocks US$385 Million from Cozamin Sale

Cozamin Sale Brings Capstone Up to US$385 Million

Capstone Copper Corp. (ASX:CSC) is selling its Cozamin copper-silver-zinc-lead mine in Zacatecas, Mexico, in a deal that could deliver up to US$385 million and give the company fresh room to fund its next phase of growth.

The consideration comprises US$275 million in upfront cash, US$15 million in shares in buyer Luca Mining, US$35 million of deferred consideration and up to US$60 million in additional cash tied to future copper prices. The upfront amount remains subject to customary closing adjustments and is based on a cash-free, debt-free structure with a normalised level of working capital.

Copper Price Determines the Final Upside

The headline value is not guaranteed. Luca will pay the contingent component after each of the 2027, 2028 and 2029 calendar years, with annual payments of US$10 million if the average LME copper price falls between US$7.00 and US$7.75 a pound, US$15 million between US$7.76 and US$8.50, and US$20 million at US$8.51 or above.

The US$35 million deferred payment is due on the first anniversary of completion and may be settled in cash or Luca shares, at Luca’s option. That leaves the eventual mix and value of consideration partly dependent on copper prices and the buyer’s choice of settlement.

Proceeds Target Growth Projects and Balance Sheet

Capstone said net proceeds will strengthen its balance sheet and provide financial flexibility for its growth pipeline. President and chief executive Cashel Meagher described the sale as a portfolio streamlining exercise that should allow capital and management attention to be redirected towards what the company calls high-return growth projects in Chile and the United States.

Capstone will also retain indirect exposure to Cozamin through its Luca shareholding. The company said Cozamin had delivered consistent performance since its first full year of operations in 2007, while arguing that Luca’s regional expertise and operating experience in Mexico could support the mine’s future development.

Completion Still Depends on Regulatory Approval

The transaction is expected to close in the fourth quarter of 2026, subject to customary conditions and regulatory approvals, including clearance from the Mexican National Antitrust Commission and stock exchange approvals. It does not require Capstone shareholder approval or financing conditions.

Until completion, the key uncertainties are straightforward but material: whether the sale closes on schedule, what adjustments are made to the upfront payment, whether the deferred consideration is paid in cash or shares, and how much of the copper-price-linked component is ultimately earned.