Codelco Copper Output Plummets 47%, Triggering Data Integrity Questions

January Output Collapses 47% After Record December

Chilean state-owned copper producer Codelco reported a dramatic 47% month-on-month collapse in copper production for January 2026, raising significant questions about its operational stability. Output fell to 91,000 tons, a stark reversal from the 172,300 tons produced in December 2025, which had marked a ten-year monthly high. The January figure also represents a 1.8% decline compared to the same month a year prior.

The extreme swing in production is notable because the December peak was far outside the company's recent performance. Codelco's average monthly output from January to November 2025 was just 105,600 tons, making the year-end surge an anomaly that has drawn market scrutiny.

Former Executives Question Data Integrity

The sharp production reversal has fueled skepticism from industry insiders, including four former Codelco executives who questioned the authenticity of the December production figures. One former executive anonymously told Reuters that while data adjustments to meet goals are common, the magnitude of Codelco's fluctuation was significant enough to warrant questions and suggested poor planning. Codelco's internal documents showed certain mines, like Chuquicamata and Salvador, produced far beyond their forecasts in December.

In its defense, Codelco attributed the December spike to legitimate operational factors. The company stated it drew heavily from inventories at leach pads and other unplanned sources. It also cited improved ore grades and processing efficiency at its Andina mine as contributing factors, framing the result as a testament to its technical capacity.

Long-Term Growth Targets Under Scrutiny

This production volatility jeopardizes the credibility of Codelco's long-term recovery strategy. The company's output in 2023 fell to a 25-year low, hampered by persistent declines in ore quality and delays in major upgrade projects. While Codelco aims to increase production to 1.7 million tons by 2030, the recent data swings suggest that achieving a sustainable structural recovery remains a significant challenge.

The situation creates a difficult narrative for the world's largest copper producer. While its domestic operational reporting faces internal challenges, Codelco is simultaneously being courted by international partners like India's Hindustan Copper, which praises the Chilean firm's technical expertise in deep mining. This contrast highlights the pressure on Codelco to stabilize its core operations to maintain its global leadership position.