Antofagasta stock holds firm after guidance cut as copper prices support revenue
Published on 08/29/2026 at 12:35 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS
Antofagasta plc stock, linked to ISIN GB0000456144, is trading steadily after the Chilean copper miner cut its 2026 production guidance in mid-August but still reported double-digit revenue growth for the first half of 2026 as copper prices stayed elevated as of August 29, 2026.
The London-listed group reduced its full-year copper output target on August 13, 2026, yet half-year revenue rose 18 percent to $4,479.0 million, underscoring how stronger pricing has cushioned the operational impact of weather-related disruptions in Chile.
For investors, the mix of lower volume guidance but higher realised prices turns attention to margins, cash flow and how the company manages the remainder of the 2026 production year.
Guidance trimmed after severe weather
Per a detailed market commentary published on August 28, 2026, Antofagasta lowered its 2026 copper production guidance to a range of 625,000 to 655,000 tonnes from a prior range of 650,000 to 700,000 tonnes, a reduction of 25,000 tonnes at the bottom end and 45,000 tonnes at the top end, equal to a 5.2 percent cut at the midpoint. The Kitco analysis on Chilean miners attributes the change to severe rain and snow that forced an orderly shutdown at the Los Pelambres operation after the government declared a state of catastrophe in the Coquimbo Region.
The guidance reduction underscores the operational sensitivity of large-scale open-pit mining to extreme weather, but the company has emphasised that its asset base remains intact and that production is expected to normalise once conditions stabilise and remediation measures are completed.
Because copper volumes drive both revenue and unit costs, the lower guidance implies slightly less output across 2026 than previously planned, but the overall impact on earnings depends heavily on realised copper prices and on the performance of by-product streams such as molybdenum, gold and silver.
Half-year 2026 revenue rises double digits
Despite the weather disruption, the same market commentary points out that Antofagasta generated half-year revenue of $4,479.0 million in its latest reported period, which represents an 18 percent increase compared with the corresponding half-year a year earlier, driven primarily by higher realised copper prices partially offset by lower sales volumes in copper and by-products. The Kitco breakdown of Antofagasta HY26 revenue notes that copper contributed 77 percent of group revenue, with molybdenum accounting for 10 percent, gold for 9 percent and silver for 3 percent.
This composition highlights that Antofagasta remains overwhelmingly a copper play, even though by-products provide useful diversification and incremental cash flow. A key takeaway for investors is that a supportive copper price environment can offset temporary output constraints, allowing revenue and operating cash flow to grow even when tonnage is under pressure.
The 18 percent revenue increase, against a backdrop of weather-related shutdowns, suggests that pricing power and product mix have been strong. It also reflects global copper market conditions in 2026, where constrained mine supply and ongoing demand from electrification and infrastructure have helped keep prices elevated and volatility manageable.
Dividend and London market snapshot
On the capital returns side, Antofagasta’s London listing data show that the company has declared a cash dividend with a forward annualised payout of 0.58 in its home currency, corresponding to a yield of 1.43 percent on the current share price, with an ex-dividend date set for September 3, 2026. A market data overview for ANTO.L lists the forward dividend and the forthcoming ex-dividend date alongside the latest earnings date of August 13, 2026, when the half-year figures were released.
That upcoming ex-dividend date gives a concrete near-term milestone in the company’s calendar and signals a continued commitment to returning cash to shareholders, even as guidance has been trimmed. Cash dividends, even at modest yields, can support total return and may appeal to income-oriented investors who are comfortable with cyclical commodity exposure.
The same market data snapshot records a closing share price of GBp4,039.00 for Antofagasta on its London Stock Exchange listing, with the quote marked as at close on August 28, 2026. As of that date, the stock traded without a daily percentage change, indicating a flat close on the session in question, although intraday dynamics will vary with copper prices and broader equity-market sentiment.
Copper market and peer context
The broader context for Antofagasta’s 2026 performance is a copper market shaped by both supply disruptions and resilient demand. Recent reporting on Chile’s state-owned miner Codelco, for example, shows that pre-tax profit rose more than fourfold to $1.97 billion in the first half of 2026 as realised copper prices jumped 41 percent, even though output fell 11 percent year-on-year. An earnings coverage on a major Chilean copper producer links the stronger profit to the copper rally, demonstrating how pricing can outweigh volume declines.
For Antofagasta, the same dynamic is visible in the half-year 2026 results: lower sales volumes in copper and by-products did not prevent an 18 percent revenue increase because realised prices were materially higher. In a market where peers can grow profit despite lower output, Antofagasta’s ability to grow revenue while trimming volume guidance points to a supportive macro backdrop.
Investors tracking the stock should therefore pay close attention to both company-specific developments, such as the pace of production recovery at operations affected by severe weather, and to macro drivers, including global copper demand for electric vehicles, grid expansion and renewable energy projects.
Focus on Los Pelambres and by-product streams
The operational heart of the recent guidance change lies at Los Pelambres, one of Antofagasta’s flagship assets in Chile. The shutdown triggered by heavy rain and snow and by the state of catastrophe declaration in the Coquimbo Region has constrained output, but the company’s portfolio includes other operating segments such as Centinela, Antucoya, Zaldívar, Exploration and Evaluation, and a Transport Division.
The revenue breakdown indicating 77 percent from copper, 10 percent from molybdenum, 9 percent from gold and 3 percent from silver shows that by-product streams collectively contribute 22 percent of group revenue, providing an additional layer of earnings resilience. If copper output is temporarily muted at one operation, strong performance in molybdenum or gold can help soften the impact on overall results.
Given the guidance cut, a key question for the remainder of 2026 is how quickly Los Pelambres can return to more normal operating conditions and whether any other mines in the portfolio face similar weather-related or technical challenges. The balance between copper volumes and price levels will determine whether the company can sustain or extend the revenue growth seen in the first half.
Product spotlight: copper concentrates from Antofagasta’s Chilean mines
A central product in Antofagasta’s portfolio is copper concentrate produced at its major Chilean mines, including Los Pelambres and Centinela. These concentrates, which also contain payable amounts of gold and silver, are sold to smelters and refiners that transform them into copper cathodes and other finished products used in electrical wiring, motors and a wide range of industrial applications.
For downstream customers, Antofagasta’s copper concentrates offer a reliable source of supply from a group of long-life assets in Chile, a country that remains one of the world’s leading copper producers. The quality of these concentrates, combined with established logistics through the company’s Transport Division, positions the miner as an important partner for smelters seeking stable feedstock in an increasingly constrained global copper market.
Antofagasta stock and London trading snapshot
In London trading, Antofagasta stock most recently closed at GBp4,039.00 on August 28, 2026 on its ANTO.L line, according to the latest quote data for the session in question. As of that close, the shares reflected the market’s assessment of the guidance cut announced on August 13, 2026 alongside the stronger half-year revenue performance.
For investors, the key numerical markers are clear: a 5.2 percent reduction to the midpoint of copper output guidance for 2026, half-year revenue growth of 18 percent to $4,479.0 million, and a forward dividend yield of 1.43 percent on the current share price with an ex-dividend date of September 3, 2026. Together, these figures frame the trade-off between operational risk and earnings support that defines Antofagasta’s investment case as of late August 2026.
Fact box
Company: Antofagasta plc
ISIN: GB0000456144
Ticker: ANTO.L
Exchange: London Stock Exchange
Price (as of August 28, 2026, 7:12 p.m. local time): GBp4,039.00
Market cap: data linked to current trading in London as per the latest available quote
Sector / Industry: Metals and Mining - Copper
Index membership: FTSE 100
