Alcoa Corp., the largest U.S. aluminum producer, reported that President Donald Trump's 25% tariff on metal imports has cost the company $20 million since the duties were implemented. The tariffs, affecting imports from Canada, Alcoa's largest metal-producing region, have led to increased costs and potential supply disruptions. Alcoa's CEO, Bill Oplinger, has been actively engaging with customers, suppliers, and logistics companies to mitigate these effects. CSX Corp., a major U.S. railroad, saw its first-quarter net income drop by 27% to $646 million, or 34 cents per share, from $880 million, or 45 cents per share, the previous year. The decline was attributed to two major construction projects that reduced shipment volumes. Despite the quarterly setback, CSX's CEO, Joe Hinrichs, anticipates an increase in volume for the year, driven by expected growth in U.S. manufacturing. Vale, a leading iron ore supplier, reported a 4.5% decrease in its first-quarter iron ore production, totaling 67.7 million tons, due to heavy seasonal rainfall. Conversely, sales rose by 3.6% to 66.1 million tons, supported by the use of existing stockpiles. Rio Tinto, a global mining giant, expects its 2025 iron ore shipments from its Pilbara operations in Australia to be at the lower end of its guidance. The company reported first-quarter shipments of 70.7 million tons, a 9% decrease from the previous year, influenced by extreme weather events. Rio Tinto's production guidance for the year remains unchanged.