Trimet says Alcoa-South32 deal creates Brazil duopoly, urges block
By Maria Júlia Baumert ( November 6, 2026, 19:56 GMT | Insight) -- German aluminum producer Trimet has asked Brazil's competition authority to block Alcoa's acquisition of South32's alumina business, arguing that the transaction would reduce the number of Brazilian suppliers of smelter-grade alumina from three to two and leave the merged company with about 52 percent of third-party sales. Trimet also alleged that the deal would give Alcoa effective control over the principal global alumina price benchmark and reverse a structural remedy imposed on Alcoa more than 25 years ago.German aluminum producer Trimet has asked Brazil's competition authority to block Alcoa's acquisition of South32's alumina business, arguing that the transaction would reduce the number of Brazilian suppliers of smelter-grade alumina from three to two and leave the merged company with about 52 percent of third-party sales....
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