Hot Chili’s Financing Thesis Rests on a Water Concession

A single water concession, held by a company most investors still treat as a copper stock, carries a post-tax net present value (NPV) of approximately US$977 million at Stage 2 scale. On paper, that is enough to pay for most of a US$1 billion copper mine without issuing a single new share.

Hot Chili Limited’s Huasco Water subsidiary holds the only active maritime water concession in Chile’s Huasco Valley, a region that now effectively prohibits new projects from drawing on continental groundwater. The March 2025 Prefeasibility Study (PFS) for Huasco Water assigned a combined two-stage NPV approaching US$1.1 billion to an asset most equity market participants are not pricing at all. With a Final Investment Decision (FID) for Costa Fuego targeted for approximately 2029, the company is actively working to convert that optionality into a concrete, non-dilutive funding structure.

This analysis unpacks how the Huasco Water asset works, what the broader Hot Chili financing architecture looks like, where the genuine risks sit, and why the gap between current market pricing and management’s stated financing thesis may be the most important variable for investors to understand right now.

Huasco Water: the concession embedded in a copper story that valuations have yet to capture

Chile’s Atacama and Huasco region is among the most water-stressed copper belts on earth. New projects are now effectively barred from using continental groundwater, making maritime concessions, which permit the extraction and inland transport of seawater, the binding constraint on whether a mine can be built at all.

Chile’s 2022 Water Code reform introduced new obligations for underground water extraction in restricted zones and tightened monitoring requirements for projects drawing on continental groundwater, codifying the regulatory environment that makes maritime concessions the only viable long-term water supply pathway for new mining developments in water-stressed regions like Huasco.

Hot Chili secured the only active maritime water concession in the Huasco Valley after approximately a decade of permitting work. Across the broader Atacama and Huasco region, only two such concessions have been granted in roughly 18-22 years. A new entrant cannot replicate this position in any commercially relevant timeframe.

The Latin American copper development race has intensified as majors and mid-tiers compete for permitted, infrastructure-ready positions across Chile, Peru, and Ecuador, a dynamic that raises both the strategic value of assets with existing concessions and the likelihood that water infrastructure, the binding constraint across most of the Atacama and Huasco region, will attract dedicated capital from operators seeking to de-risk project timelines.

Inside the Huasco Water subsidiary

The water assets were formally transferred in 2024 into a dedicated subsidiary, Huasco Water (HW Aguas para El Huasco SpA), jointly owned 80% by Hot Chili and 20% by Chilean iron ore producer CMP. The subsidiary holds three distinct assets:

• The only active granted maritime water concession in the Huasco Valley
• Existing coastal easements, land access, and pipeline corridors required to move water inland
• A pending application for a second maritime concession, intended to expand capacity into a large multi-user desalination system

Investors assessing Hot Chili as a copper development story are effectively receiving this concession as an unmarked line item. Understanding why it cannot be replicated is the foundation for evaluating the monetisation thesis that follows.

Why seawater access changes the economics of building a copper mine in this region

Costa Fuego’s deposits sit at low altitude near the coast. That geography means the project can use raw seawater directly for mineral processing without first desalinating it, removing a major capital and operating cost burden that inland or high-altitude projects face. Copper recoveries using seawater at this altitude are approximately 2% higher than conventional processing, a margin that compounds across a multi-decade mine life.

The competitive advantage sharpens when measured against the alternatives. Neighbouring projects, including the BHP and Lundin Mining joint venture at Vicuña, face significantly higher water supply costs using routes from Copiapó.

Management estimates that levelised water supply rates from alternative sources such as the Copiapó route exceed more than double the Huasco Water PFS cost. This is a management estimate rather than an independently published study, though it is consistent with the broader cost profile of long-distance, high-lift desalination pipelines.

The BHP and Lundin Mining water sourcing arrangement for Vicuña, announced several months prior to the CEO interview, resembles Hot Chili’s previously disclosed concept of outsourcing water infrastructure to a third-party operator, suggesting the model is gaining validation in the region.

Lundin Mining’s Vicuña desalination investment, announced in June 2026, confirmed the construction of a dedicated desalination plant and water pipeline for the project, establishing the capital-intensive water infrastructure burden that third-party concession holders like Huasco Water are positioned to replace with contracted supply arrangements.

Three economic advantages flow from the coastal seawater position:

• No desalination requirement for Stage 1 supply to Costa Fuego, eliminating a significant capital cost layer
• Approximately 2% higher copper recoveries compared to conventional processing
• Lower per-unit water cost versus alternative supply routes, improving project IRR and lender underwriting capacity

The water cost differential is not a marginal NPV adjustment. At scale, it affects lender underwriting capacity, project internal rate of return (IRR), and the attractiveness of the asset to potential partners, all of which feed directly into the financing thesis.

How the two-stage water business generates nearly US$1.1 billion of NPV

The Huasco Water business is structured as two distinct stages, each with separate economics, separate capital requirements, and a different customer base. The March 2025 PFS provides the verified economic framework for both.

Stage 1: seawater supply to Costa Fuego

Stage 1 is a 62 km raw seawater pipeline delivering approximately 500 litres per second (L/s) from the Pacific to Costa Fuego’s planned concentrator. Capital expenditure is estimated at approximately US$151 million, generating a post-tax NPV of approximately US$122 million and an IRR of approximately 19% over a 20-year supply period.

The effect on the mine’s balance sheet is direct: approximately US$150 million of water-related capital moves off the copper project and into Huasco Water, creating a separately financeable infrastructure asset with its own economics.

Stage 2: the regional desalination business

Stage 2 expands capacity to approximately 1,300 L/s through a large-scale desalination plant and expanded pipeline network. The customer base broadens beyond Costa Fuego to supply what management describes as the largest cluster of undeveloped copper projects in the world, plus local agriculture and communities in the Huasco Valley.

The post-tax NPV for Stage 2 alone is approximately US$977 million.

The critical regulatory gate is the second maritime concession. This application has been in process for approximately five years within Huasco Water. The Chilean government contacted the company directly to confirm the application was progressing, and Chile’s Ministry of Finance has granted priority (fast-track) status to the project. As of August 2026, no binding approval timeline has been confirmed.

The Stage 2 NPV is the number that makes the non-dilutive financing thesis arithmetically plausible. Investors need to understand that it is contingent on the second maritime concession being granted, and that while regulatory signals are positive, no binding timeline exists.

How Hot Chili’s financing architecture is structured to fund a US$1 billion project

Costa Fuego’s total initial capital expenditure is estimated at approximately US$1 billion. The equity requirement, the portion that cannot be covered by project debt, sits at approximately US$600-700 million. Each layer of the financing architecture is designed to reduce the residual equity that the next component must cover.

Glencore anchors the revenue side. As both a major shareholder and the holder of benchmark offtake terms covering 60% of Costa Fuego’s production for the initial eight years, Glencore provides the revenue certainty lenders need to underwrite project debt. Approximately 160,000 tonnes of annual concentrate production remains uncommitted, available for additional offtake-linked financing or partnering.

Tightening copper inventory conditions, where visible exchange stocks have contracted to a buffer measured in days rather than weeks, sharpen the lender and offtaker calculus for long-dated supply agreements, making the revenue certainty that Glencore’s benchmark offtake provides materially more valuable than it would be in a well-supplied market.

The Huasco Water monetisation is designed to cover most or all of the residual equity requirement after project debt. Three pathways are under consideration:

• Sale of a majority or significant minority stake to a strategic infrastructure or water partner, while retaining long-term water supply rights for Costa Fuego
• A joint venture or build-own-operate structure under which a partner funds and operates the desalination and pipeline system, earning returns from contracted water sales
• Asset-level financing secured directly against Huasco Water’s contracted cash flows

As of August 2026, multiple non-binding indicative offers for the water asset are under review. No formal commitments on specific monetisation structures or timelines have been announced.

Gold production provides an additional unexercised lever. At PFS scale, Costa Fuego is estimated to produce approximately 50,000 ounces per year, rising to approximately 70,000 ounces per year with La Verde integration, representing approximately 10% of total project revenue. No gold streaming or forward-sale agreements have been entered, preserving this optionality for future use. Costa Fuego’s concentrate is also expected to be arsenic-free, an increasingly valuable trait as smelters tighten impurity standards, improving both offtake terms and lender confidence.

Total planned expenditure for the current year is approximately US$60 million across development, environmental assessment, and resource programmes. BMO Capital Markets has been engaged to run a formal strategic partnering process for Costa Fuego.

Where the thesis can break down: material risks investors should map before accepting the headline numbers

Not all risks facing this thesis carry equal weight. Some threaten the structure itself; others affect timing without impairing the core logic.

1. Regulatory timing on the second maritime concession. This is the most structurally threatening risk. The second concession has been in process for approximately five years, and despite priority status and direct government communication confirming progression, no binding approval timeline exists as of August 2026. A delay or adverse outcome would directly impair the US$977 million Stage 2 NPV and compress the financing timeline before the approximately 2029 FID target.
2. Monetisation valuation versus PFS NPV. Infrastructure investors may apply higher discount rates or impose conservative contract assumptions that reduce the realised value materially below the PFS headline. The gap between a US$977 million PFS NPV and the price a buyer or partner is willing to pay in a binding transaction is where the non-dilutive thesis faces its sharpest market test.
3. Counterparty and competitive behaviour. Large regional operators such as BHP, Lundin Mining, and others maintain alternative water arrangements and may develop their own solutions, reducing demand for Huasco Water services or limiting pricing power. Competitive considerations could also constrain their willingness to rely on a third-party water asset controlled by a smaller developer.
4. Macro and commodity price sensitivity. Sustained lower copper prices would weaken Costa Fuego’s economics, reduce lender appetite, and compress the effective NPV available for monetisation on both sides of the capital stack.

The execution sequencing problem

Hot Chili must simultaneously manage the Costa Fuego Environmental Impact Assessment (EIA) and feasibility study, Huasco Water’s technical and permitting progression, the strategic partnering process via BMO Capital Markets, and ongoing exploration and resource growth at La Verde. With FID targeted for approximately 2029, the company has roughly 2.5 years of runway from mid-2026 to execute across all tracks.

Missteps in sequencing or negotiation could reduce the shareholder benefit the structure is designed to deliver. Investors who understand which risks threaten the thesis structurally versus which ones merely affect timing are better positioned to evaluate whether current pricing adequately compensates for those risks.

Catalysts that could reprice Huasco Water and reshape the investment case

Most market pricing treats Hot Chili as a single copper development story, applying a standard stage and financing risk discount to Costa Fuego’s NPV without capitalising Huasco Water’s embedded value. The combined two-stage NPV of approximately US$1.1 billion sits largely outside consensus valuation frameworks.

The scarcity context sharpens this gap. Independent copper projects capable of producing more than 100,000 tonnes per annum (tpa) in Tier-1 jurisdictions number approximately five globally, collectively representing an estimated 620,000-650,000 tpa of potential new supply. Costa Fuego is targeting approximately 150,000 tpa.

The scarcity premium attached to large, permitted copper projects reflects the depth of the underlying copper supply shortfall, which structural modelling places at roughly 30% of forecast demand by the early 2030s, a gap no single new mine can close and one that directly inflates the strategic value of ready-to-build assets like Costa Fuego.

BHP’s acquisition of OZ Minerals at approximately A$10 billion for approximately 120,000 tpa capacity illustrates the scarcity premium major miners will pay for high-quality copper growth in Tier-1 jurisdictions where permitting and infrastructure risk are reduced.

Two concrete catalysts would force the market to reprice the water optionality:

• Formal granting of the second maritime concession. This would convert Stage 2 from a permitting-dependent option into a financeable infrastructure asset with verified regulatory approval.
• A visible commercialisation transaction or partner announcement for Huasco Water. A binding deal at or near infrastructure valuations would establish a market-observable data point for the water asset’s worth, something consensus models currently lack.

Multiple non-binding indicative offers are already under review. Until one of these catalysts crystallises, investors are effectively pricing Costa Fuego without fully capitalising the water optionality, while management is working to convert that optionality into concrete, non-dilutive funding.

For investors wanting to understand why markets persistently underprice embedded optionality in junior and development-stage miners, our full explainer on junior miner valuation gaps examines the structural reasons equity markets apply single-asset copper metrics to companies with multiple monetisable assets, including historical examples of how those gaps eventually close.

Strong internal logic, significant execution dependencies still to resolve

The internal logic of Hot Chili’s financing architecture holds together when examined piece by piece. Huasco Water’s PFS NPV covers the equity requirement. Glencore’s offtake provides the revenue certainty to underwrite project debt. Unstreamed gold production and arsenic-free concentrate quality offer a margin of safety. Current treasury, including the A$40 million placement completed in February 2026, the Orion investment, and the US$15 million royalty amendment secured in July 2026, funds de-risking milestones through to FID. Chile’s Ministry of Finance has granted priority status to both Costa Fuego and Huasco Water.

The distinction between structural coherence and execution, however, is the line that matters most. No formal monetisation commitments exist as of August 2026. The second maritime concession has no binding timeline. The plan requires simultaneous execution across multiple complex tracks, all converging before the approximately 2029 FID window closes.

The water concession, if monetised at infrastructure valuations, could pay for the copper project to be built without issuing new shares. That outcome depends on at least two regulatory and commercial events that have not yet occurred.

Investors with a clear-eyed view of what still needs to go right are better positioned to size a position than those who have accepted the headline NPV numbers without testing the execution dependencies underneath them.

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. Financial projections referenced in this analysis are derived from prefeasibility-level studies and are subject to market conditions and various risk factors.

—