Lundin Mining Announces an Update Regarding the 2017 Class Action

The most recent news, dated November 28, 2025, announces an update regarding a securities class action lawsuit originally filed in 2017. The Supreme Court of Canada has dismissed the company's application for leave to appeal a prior decision by the Ontario Court of Appeal. This ruling allows the class action to proceed to trial. The lawsuit alleges that Lundin Mining failed to make timely disclosure of information relating to a pit wall instability and rockslide at its Candelaria mine in Chile in 2017. The company states that the court's decision is not a judgment on the merits of the case and that it intends to "vigorously defend" the action.

This news is materially negative. While the legal action is not new, the Supreme Court's decision to allow the class action to proceed to trial is a significant negative development. It removes the possibility of an early dismissal and solidifies a long-term, unquantifiable legal and financial risk for the company. Such legal uncertainty can create an overhang on the stock, as potential damages and legal costs are unknown.

This negative legal development stands in stark contrast to the company's exceptional operational and financial performance reported just three weeks earlier on November 5, 2025. In its Q3 results, Lundin Mining reported: - Revenue exceeding $1 billion, its best quarter year-to-date. - A significant increase in full-year copper production guidance to 319,000-337,000 tonnes (up ~11,500 tonnes at the midpoint). - A material reduction in full-year cash cost guidance to $1.85-$2.00 per pound of copper. - A rapidly strengthening balance sheet, with the company expecting to be essentially net-debt-free by the end of 2025.

The Q3 earnings call transcript from November 6 confirmed management's confidence, detailing strong performance at Candelaria and Caserones, successful cost-control initiatives, and steady progress on the transformational Vicuña project.

From a risk-averse perspective, the legal news is concerning. It introduces a non-operational risk that is difficult for the market to price. While the company's fundamentals are robust and improving, this class action lawsuit now represents a tangible threat that could result in a significant financial liability down the line. It detracts from an otherwise very positive narrative of operational excellence and strategic execution.

Lundin Mining is a Canadian-based diversified base metals mining company. Following the recent sale of its European assets, the company's operations are now concentrated in the Americas, with mines in Chile (Candelaria, Caserones), Brazil (Chapada), and the USA (Eagle).

The company's flagship growth project is the Vicuña Project, a 50/50 joint venture with BHP located on the Argentina-Chile border. Vicuña Corp. combines the Filo del Sol and Josemaria deposits, creating one of the largest undeveloped copper, gold, and silver resources in the world. This project is the cornerstone of Lundin's strategy to become a top-ten global copper producer and represents its transformational, long-term growth driver.