BHP and KGHM Sign Global Copper MoU Ahead of 2035 Supply Crunch

Two of the world’s most consequential copper producers put their names to the same document on 8 September 2026, and the timing was not incidental. BHP and KGHM Polska Miedź signed a cooperation framework that formalises, at chief-executive level, a working relationship that has been quietly building for months. It lands as the global copper market stares down a projected 30% supply deficit by 2035.

The pairing carries weight. BHP ranked first among global copper producers in Q2 2026, turning out roughly 2 million tonnes a year. KGHM is the European Union’s largest mined copper producer and holds a 55% stake in the Sierra Gorda operation in Chile, where BHP’s Spence mine sits in the same district.

What is new is not the relationship. It is the formalisation of that relationship at the top of both organisations.

Here is what the agreement covers, what is driving it, and what investors tracking the copper majors should read into a document that commits neither company to spend a single dollar.

What BHP and KGHM have actually agreed to

The document signed on 8 September 2026 between BHP World Exploration Inc and KGHM Polska Miedź S.A. is a memorandum of understanding, and the word that matters most in that description is “understanding.” It is a non-binding framework for structured dialogue and the identification of joint initiatives. It is not a joint venture, and it is not an investment commitment.

Critical minerals MoU frameworks have proliferated across the sector in recent years, with producers using non-binding agreements to establish structured dialogue before committing capital, a pattern visible in BHP’s earlier 2023 agreements with China Copper and Daye Nonferrous as well as this September 2026 arrangement with KGHM.

The stated scope is deliberately broad:

• Knowledge sharing and the exchange of technical and operational experience
• Copper exploration opportunities
• Development-stage projects
• Other areas where the two companies judge cooperation could create mutual value

The geographic scope extends explicitly beyond Chile, though neither party named a specific new country or region. Both chief executives anchored the rationale in the same three demand drivers.

“Copper demand is being driven by economic growth, the energy transition, and digitalisation,” was the shared framing offered by Brandon Craig, BHP’s Chief Executive Officer, and Remigiusz Paszkiewicz, President of KGHM’s Management Board, on the announcement date.

Here is the part that matters before you draw any conclusions. The MoU does not commit either company to specific capital expenditure, timelines, production targets, or named joint projects. It builds on an earlier district-level agreement between Sierra Gorda and Spence signed in June 2026, but it adds no binding obligations of its own.

That gap, between what the framework formalises and what it actually commits, is the single most important thing to hold onto. For investors tracking copper majors, the distinction between a framework agreement and a binding investment decision is not pedantry. It is the difference between reading this as a supply commitment, which it is not, and reading it as structured optionality, which it is.

Two neighbours in Chile, one expanding ambition globally

To understand why this MoU reads as an escalation rather than a surprise, start with the two companies’ existing footprint in the Atacama.

BHP’s Spence mine and KGHM’s Sierra Gorda operation share the same Chilean district. Sierra Gorda is owned 55% by KGHM and 45% by South32, and in June 2026 the two operations signed their own district-level MoU, aimed at capturing supply-chain and process-optimisation synergies as both confront the same problem: declining ore grades and softening output.

The scale gap between the two parent companies is significant, and worth seeing plainly.

Chile copper supply constraints, including water licence limitations in the Atacama, rising energy costs, and grade deterioration at legacy pits, sit at the centre of why both Spence and Sierra Gorda are pursuing operational cooperation rather than purely independent expansion programmes.

The output asymmetry is stark, but it matters less than the complementary fit. What KGHM brings to BHP is European institutional credibility and an established Chilean operating presence. What BHP brings to KGHM is global project-development reach and an exploration network that spans several continents.

There is also active capital behind KGHM’s side of the relationship. Sierra Gorda produced 157.9 kt of payable copper in 2025 on a 100% basis, and KGHM has a fourth grinding line planned at an estimated US$700-725 million, targeting roughly a 20% production increase. That is a company deploying capital, not one standing still.

From a Chilean district tie-up to a global framework

The progression is what makes the September agreement legible. In June 2026, the tie-up was operational and Chile-specific: logistics, procurement, and processing optimisation between two mines in the same district. By September 2026, the framework had become strategic and globally open-ended, with cooperation explicitly permitted beyond current operating locations.

Three months separated the two agreements. For a relationship between two major producers, that is a fast cadence, and it tells you the formalisation is accelerating rather than stalling.

What a 30% copper deficit by 2035 has to do with this partnership

None of this happens in a vacuum. The backdrop is a structural supply problem that the industry has been circling for years.

The International Energy Agency’s July 2026 commentary warned that, under the current global project pipeline, the copper market could face a supply deficit of approximately 30% by 2035.

The demand side is familiar: electric-vehicle adoption, grid expansion, renewable-energy infrastructure, and digitalisation all raise the copper intensity of the modern economy. The supply side is where the strain sits. Permitting delays, water constraints in northern Chile, rising capital costs, and lead times from discovery to production that routinely exceed a decade all limit how quickly new supply can respond.

The copper structural deficit is not a single-event shock but a compounding problem built from permitting delays, water scarcity in northern Chile, and a discovery-to-production lead time that routinely runs beyond a decade, conditions that no single MoU can resolve.

This is the context that gives a non-binding framework its strategic value. Copper cooperation runs along a spectrum, and the BHP-KGHM MoU sits at the lightest end of it:

• Non-binding technical frameworks: structured dialogue and knowledge exchange without capital commitment. This MoU, and BHP’s March 2023 MoUs with China Copper and Daye Nonferrous, sit here.
• District operating alliances: operational synergy and cost reduction without ownership change. The June 2026 Sierra Gorda-Spence tie-up is the example.
• Equity joint ventures: full capital commitment and shared ownership. The Sierra Gorda JV itself is the model.

The honest caveat has to be applied. Mining MoUs frequently stall at the framework stage and never progress to joint ventures or binding investment. Some function primarily as strategic signalling. The copper-market impact of this specific agreement depends entirely on what, if anything, follows it.

For investors watching supply timelines, that makes the MoU a structured optionality play rather than a near-term production catalyst. The IEA deficit figure is the market reality giving that optionality its worth. The framework itself changes no supply forecast.

What this partnership changes, and what comes next

Strip away the framing and what the MoU concretely establishes is a mechanism: a structured, executive-level channel through which both companies can identify, evaluate, and potentially act on joint opportunities in copper exploration and development, globally rather than just in Chile.

Cross-border mining agreement structures between producers from different jurisdictions, such as an Australian major and a Polish state-controlled miner, typically require alignment on governance, information-sharing protocols, and regulatory disclosure obligations across multiple legal systems before any binding joint-venture instrument can follow.

That is genuinely more than nothing. It is also considerably less than a supply solution. The question is not whether two miners signed an agreement. The question is what would confirm the agreement is progressing toward real impact.

Here is what to monitor as the relationship develops:

• Named joint project announcements, as opposed to further statements of intent
• Any binding joint-venture agreement carrying committed capital
• Disclosure of shared drilling programmes or resource-definition work
• Expansion of the district-level MoU scope into new jurisdictions

The three pillars of this story, the framework’s open-ended scope, KGHM’s active US$700-725 million Sierra Gorda expansion, and the IEA’s deficit projection, all point the same way: toward optionality that has yet to be exercised. Watch for the moment the language shifts from “may evaluate” to “will develop.” That is when a framework becomes a commitment.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Past performance does not guarantee future results, and forward-looking statements are speculative and subject to change based on market developments and company performance.