Anglo American and Teck Resources face resistance from Glencore as they negotiate the integration of Chilean copper mines to finalize their $50 billion merger. Glencore, holding a 44 percent stake in the Collahuasi mine, is leveraging its position to demand favorable terms, potentially complicating Anglo's goal to close the deal next month pending Chinese regulatory approval. The merger aims to create a copper-mining giant, combining Anglo's Collahuasi operations with Teck's Quebrada Blanca complex.

Anglo Chief Executive Duncan Wanblad emphasized the industrial logic of the tie-up, stating it could add $1.4 billion annually in earnings before interest, tax, depreciation, and amortisation. However, a former insider warned Glencore would.