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Rio Tinto and Glencore have ended negotiations for a proposed $300 billion merger due to disagreements on leadership roles and valuation. Rio sought to retain its chair and CEO in the combined entity, while Glencore demanded a higher valuation.

The merger, which would have created one of the world's largest copper producers, faced complications from fluctuating commodity prices. Both companies will now focus on long-term value as independent entities, with Rio reassessing its dual-listed structure.