Antofagasta Earns $2B, Trims 2026 Copper Output Target

Antofagasta (LSE: ANTO) reported a $2 billion profit and a 27% rise in first-half core earnings, but cut its 2026 copper production forecast after extreme weather forced a shutdown at its flagship Los Pelambres mine in Chile.

Antofagasta plc (LSE: ANTO) delivered the kind of half-year result copper producers have grown used to in a tight market — a $2 billion profit and core earnings up 27% — and then handed investors the offsetting detail in the same breath: its 2026 copper production forecast is coming down, because extreme weather shut Los Pelambres, the Chilean mine that anchors the group’s output.

That combination captures the central tension in copper equities right now. Prices and margins have been strong enough to lift earnings sharply. Physical delivery has not kept up. When the two diverge, the market tends to look past the profit line and price the tonnes.

What the numbers say, and what they leave out

The reported figures are unambiguous on profitability. Antofagasta booked a $2 billion profit, and first-half core earnings — the underlying measure that strips out one-off items and financing effects to show what the mines themselves generated — rose 27% against the comparable period. For a producer whose costs are largely fixed in the short run, that scale of improvement is typically a function of realised copper pricing rather than volume heroics.

The guidance revision is the part that carries forward. Antofagasta cut its 2026 copper production forecast after the Los Pelambres stoppage, as Northern Miner reported. A weather-driven shutdown at a flagship asset is not a reserve problem or a grade problem; it is lost time. But lost time in copper mining is rarely recovered in full within the same calendar year, because mills run near capacity by design and ore movement schedules are built months ahead.

Two things the disclosure does not resolve, and which will determine how the second half is judged:

• How much of the deferred production is genuinely deferred into 2027 rather than permanently lost.
• What the outage does to unit costs — fewer tonnes over the same fixed cost base pushes cash cost per pound higher, independent of what the copper price does.

Why a single Chilean mine moves the global balance

Chile is the world’s dominant copper jurisdiction, and Los Pelambres sits among the assets that matter to the global supply picture rather than just to one company’s income statement. That is why an interruption there is read as a market event, not simply a corporate one.

Copper’s supply story over the past several years has been a repetitive one: guidance set, guidance trimmed. The causes rotate — water scarcity, grade decline, permitting delays, labour action, and now extreme weather — but the direction of the revisions has been consistent. Each individual cut is small against annual global consumption. Cumulatively, they are the reason the market has stayed tight even as new projects have been sanctioned.

Weather is the newer entry on that list, and arguably the most awkward for planners. Drought has been a known constraint on Chilean copper for years, forcing operators toward desalination and long pipelines. An acute storm-driven shutdown is a different risk profile: it is not something a multi-year water strategy neutralises, and it is not something a mine plan can be smoothed against. Investors assessing Chilean copper assets are increasingly being asked to underwrite climate variability as an operating line item rather than a footnote.

The demand side has not paused

What makes supply slippage consequential is that copper’s demand drivers are structural rather than cyclical. Grid rebuilds, transmission expansion, data centre construction, electric vehicles and battery storage all consume copper in volumes that do not flex much with quarterly sentiment. Utilities and grid operators buy on multi-year schedules.

That is the asymmetry underlying the whole sector. A producer that misses tonnes in a soft market takes a revenue hit. A producer that misses tonnes in a market where the marginal buyer cannot easily substitute contributes to price support — which is part of why Antofagasta could report a 27% core earnings increase in the same period that its flagship mine was interrupted. Higher realised prices absorbed a good deal of the operational pain.

The risk for equity holders is that this works only up to a point. A company that consistently sells fewer pounds at higher prices eventually loses the argument with investors who bought it for volume growth, not for price beta they could get more cheaply elsewhere.

How the tape framed the day

Antofagasta’s shares trade in London, so the result landed against a US session that was risk-positive but not uniformly so. As of the last trade at 15:25 GMT on 13 August 2026, the S&P 500 tracker (SPY) was at $776.96, up 0.58% from its prior close of $772.49, and the Nasdaq 100 proxy (QQQ) was at $732.94, up 1.28% from $723.70. The Dow 30 vehicle (DIA) was the outlier at $536.60, down 0.10% against a $537.15 close.

The split tells you where the day’s enthusiasm sat: technology-weighted indices led, while the more industrially tilted Dow lagged slightly. That is not a copper-specific verdict, but it is the backdrop against which a mining guidance cut gets absorbed — a market rewarding growth narratives on a day when a large-cap producer was explaining lost tonnes.

What to watch from here

Several markers will determine whether this reads as a one-quarter weather event or the start of a longer reset:

• Restart and ramp at Los Pelambres. The gap between resuming operations and returning to full throughput is where guidance credibility is won or lost.
• Unit cost disclosure. If cash costs per pound rise materially on the lower volume base, the earnings quality behind the 27% core earnings gain gets tested.
• Whether 2027 guidance absorbs the deferral. Tonnes pushed forward should show up somewhere. If they do not, they were lost.
• Capital allocation. A $2 billion profit gives the board choices on dividends, buybacks and growth spend. Which one it picks signals how confident management is in the recovery.
• Peer guidance. If other Chilean operators report weather-related interruptions in the same window, the market will treat it as a regional supply issue rather than a company-specific one — with corresponding implications for copper pricing.

For now, Antofagasta has posted the profit and conceded the tonnes. In copper, the second of those usually has the longer half-life.

Key facts

• Company / listing: Antofagasta plc (LSE: ANTO)
• Reported profit: $2 billion
• First-half core earnings: Up 27%
• Benchmarks at last trade, 15:25 GMT 13 Aug 2026: SPY $776.96 (+0.58%); QQQ $732.94 (+1.28%); DIA $536.60 (-0.10%)

Frequently asked questions

What did Antofagasta report?

Antofagasta, listed in London under the ticker ANTO, posted a $2 billion profit and said its first-half core earnings rose 27%. Alongside the result, the company cut its 2026 copper production forecast after extreme weather forced a shutdown at Los Pelambres, its flagship mine in Chile.

Why did Antofagasta cut its copper production guidance?

The reduction follows an extreme weather event that shut down Los Pelambres in Chile. Mining production lost to an unplanned stoppage is difficult to recover within the same year, because mills and ore-handling schedules generally already run close to designed capacity, so the shortfall flows into the annual forecast.

What is Los Pelambres?

Los Pelambres is Antofagasta’s flagship copper mine, located in Chile, the world’s largest copper-producing country. Because it accounts for a significant share of the group’s output, an interruption there affects both Antofagasta’s reported volumes and, at the margin, the global copper supply picture that traders monitor.

How can earnings rise 27% while production guidance falls?

Copper prices and realised margins were strong enough in the period to more than offset the volume disruption. Core earnings measure what the operating mines generated before one-off and financing items, so a favourable price environment can lift that figure even when tonnes are lost to an outage.

What does core earnings mean in this context?

Core earnings is an underlying profit measure that strips out one-off charges, financing effects and other items management considers non-recurring, to show the ongoing performance of the operating business. Antofagasta’s rose 27% in the first half. It is not the same figure as the $2 billion reported profit.

What should investors watch next?

Key markers include how quickly Los Pelambres returns to full throughput, whether unit cash costs per pound rise on the lower volume base, whether deferred tonnes reappear in 2027 guidance, how the board allocates the $2 billion profit, and whether other Chilean producers report similar weather-related interruptions.

Sources

• Antofagasta’s posts $2B profit, cuts copper outlook — Northern Miner