CSC Sells Cozamin Copper-Silver Mine to Luca Mining for US$275M
Key Takeaways
- Luca Mining Corp. has signed a Share Purchase Agreement to acquire the producing Cozamin copper-silver mine in Zacatecas, Mexico from Capstone Copper Corp. for a US$275,000,000 base cash consideration, with closing targeted no later than 28 February 2027.
- The total deal structure reaches up to US$385,000,000 when including US$15,000,000 in Luca shares at closing, US$35,000,000 in deferred consideration payable 12 months post-closing, and up to US$60,000,000 in copper price-linked contingent payments across 2027–2029.
- Cozamin is a permitted, producing mine — not a development project — meaning Luca acquires immediate cash-generating copper exposure with no development gap to bridge.
- Key closing conditions include consent from Wheaton Precious Metals International Ltd. (which holds a precious metals purchase agreement over Cozamin), Mexican competition authority approval, TSXV conditional approval, and lender consent under Capstone's existing credit facility.
- Economic risk and benefit transfer to Luca from 1 November 2026, the Effective Date, with a US$700,000 per month ticking fee compensating Capstone for the interim period until physical closing.
Luca Mining signs agreement to acquire Cozamin copper-silver mine from Capstone Copper
Luca Mining Corp. (TSXV: LUCA) has signed a Share Purchase Agreement, dated 21 September 2026, to acquire the Cozamin copper-silver mine in the state of Zacatecas, Mexico, from Capstone Mining Corp., a direct wholly owned subsidiary of Capstone Copper Corp.
Under the agreement, Sierra Soleada S.A. de C.V. acts as Purchaser, with Luca Mining Corp. serving as Purchaser Guarantor. Capstone Copper Corp. acts as Vendor Guarantor. The base cash consideration is US$275,000,000, subject to working capital and net cash or debt adjustments calculated as at an effective date of 1 November 2026. The deal also includes share consideration, deferred consideration, and copper price-linked contingent payments. Closing is expected no later than 28 February 2027, subject to regulatory approvals.
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Deal structure at a glance — how Luca Mining is paying for Cozamin
The total purchase price is structured across four components:
- Cash at closing: US$275,000,000 base amount, adjusted for net cash or debt and working capital relative to a target of US$6,710,980, plus a ticking fee of US$700,000 per month for the period from 1 November 2026 to the closing date
- Share consideration: US$15,000,000 in Luca Mining Corp. common shares, issued at closing and priced at the per-security issue price from the Equity Bid Letter (note: this is not a market share price and no per-share figure is disclosed in the agreement)
- Deferred consideration: US$35,000,000 in cash, payable 12 months post-closing. Luca may elect to satisfy this in shares at the 20-day volume-weighted average trading price (VWAP), capped at 58,902,644 shares. If the aggregate share value falls short of US$35,000,000, the shortfall must be paid in cash. Capstone Copper Corp.’s ownership of Luca shares is capped at below 20% of issued and outstanding shares
- Contingent consideration: Copper price-linked cash payments payable across Contract Years 2027, 2028, and 2029
The contingent consideration structure is set out below. Only one payment tier applies per Contract Year — the payments are not additive — and total contingent consideration is capped at US$60,000,000 across all three years.
| Trigger | LME 12-Month Average Copper Price | Cash Payment (Per Contract Year) | Maximum Annual Payment | Maximum Total (3 Years) |
|---|---|---|---|---|
| First Target | US$7.00 – US$7.75/lb | US$10,000,000 | US$10,000,000 | US$60,000,000 |
| Second Target | US$7.76 – US$8.50/lb | US$15,000,000 | US$15,000,000 | |
| Third Target | ≥ US$8.51/lb | US$20,000,000 | US$20,000,000 |
What is the Cozamin Mine — and why does it matter?
The Cozamin Mine is a producing copper-silver mine located in the state of Zacatecas, Mexico, one of the country’s established mining jurisdictions. The mine has been owned and operated by Capstone Gold S.A. de C.V., with audited financial statements covering fiscal years 2024 and 2025, and a current NI 43-101 Technical Report with an effective date of 1 January 2023, published 3 May 2023.
NI 43-101 is Canada’s national standard for the public disclosure of mineral project information, requiring that resource and reserve estimates be prepared by independent qualified persons. An NI 43-101 technical report provides investors with a standardised, audited basis for evaluating a mineral asset.
A producing mine carries a materially different risk profile compared to a development-stage project. Cozamin already holds the permits, workforce, and established operating relationships needed to generate revenue from day one — there is no development gap to bridge. For a junior company like Luca, acquiring a producing asset means immediate cash-generating exposure to copper rather than years of capital spend before first production.
Copper’s demand trajectory reinforces the strategic logic. The metal is central to electrification and the global energy transition, underpinning everything from electric vehicles to grid infrastructure. Acquiring copper production at scale has become a priority for junior miners seeking to capitalise on that structural demand story.
Sierra Soleada S.A. de C.V. (the Purchaser) will be required to produce a new NI 43-101 technical report in respect of Cozamin post-closing, at its own expense.
Financing, conditions, and what happens next
Luca has secured committed financing to fund the acquisition, comprising both an Acquisition Credit Facility (debt) and an Equity Bid Letter (equity), as confirmed in the agreement. The exact facility amounts are not disclosed in the agreement. The Purchaser and Purchaser Guarantor represent that they will have sufficient funds at closing to satisfy all payment obligations under the agreement.
Key conditions that must be satisfied before closing include:
- No Material Adverse Change at Cozamin during the interim period
- Regulatory approvals, including a notification of concentration filing with Mexico’s Comisión Nacional Antimonopolio (CNA, the competition authority), required within 10 Business Days of signing
- Consent of Wheaton Precious Metals International Ltd., which holds a precious metals purchase agreement (the Wheaton PMPA)
- Lender consent under Capstone’s existing credit facility
- TSXV conditional approval for the issuance of Luca Mining Corp. shares
The Outside Date is 28 February 2027, which may be extended by up to two additional one-month periods if regulatory approvals remain pending.
Economic risk and benefit in respect of the Cozamin Mine’s business transfer to Luca from 1 November 2026, the Effective Date, even if physical closing occurs after that date. The ticking fee of US$700,000 per month compensates Capstone for this interim period between the Effective Date and the closing date.
The agreement does not include management quotes. Investors should refer to Luca Mining Corp.’s public press release regarding this transaction for commentary from management.
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Investment thesis — what this deal means for Luca Mining shareholders
This transaction represents a meaningful step-change in Luca’s scale. Acquiring a producing, permitted copper-silver mine transforms the company from a junior explorer or developer into a copper producer with an operational asset generating revenue. That shift in profile carries real consequences for how the market values the business and how the company accesses capital.
The contingent consideration structure builds in copper price optionality on both sides of the transaction. If copper prices rise through US$8.51/lb during the Contract Years 2027 to 2029, Capstone captures additional value through the contingent payments. Luca, however, acquires the mine at a locked base price of US$275,000,000, meaning its cost basis is fixed regardless of where copper trades.
The deferred consideration of US$35,000,000, payable 12 months post-closing, provides Luca with some near-term cash management flexibility, particularly given the option to settle that obligation in shares.
Investors should note that the Wheaton PMPA, a precious metals purchase agreement, remains in place post-closing and should be factored into any assessment of the mine’s economics.
Luca Mining Corp. unconditionally guarantees all obligations of Sierra Soleada S.A. de C.V. under the agreement, meaning Luca stands behind the full purchase price and all related obligations as principal obligor.
Upcoming catalysts for shareholders to monitor include the CNA regulatory approval process, Wheaton’s consent to the transaction, TSXV conditional approval for share issuance, and the commissioning of a new NI 43-101 technical report post-closing.
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