Rio Says Trump Tariffs Added $300 Million in Aluminum Costs (1)

Mining giant Rio Tinto Group said US tariffs on its Canada-made aluminum generated gross costs of more than $300 million in the first half, in another sign of how President Donald Trump’s trade agenda is shaking up metals supply chains.

The world’s second-biggest miner is also Canada’s largest aluminum producer, and sells the vast bulk of the metal in the US. Rio said Wednesday it incurred gross costs of $321 million associated with US tariffs on aluminum, but added that a “substantial part” has been clawed back from higher premiums on US sales.

Metals industries are adjusting to the trade ...