U. S. Steel produces flat-rolled steel, tubular steel products, and other steel products for industrial customers across North America and Central Europe. The company's primary product is flat-rolled steel — coils, sheets, and strip used by customers making cars, appliances, construction products, packaging, and industrial equipment. U. S. Steel sells both commodity grades and higher-value products, including advanced high-strength steel (AHSS) for automotive lightweighting, electrical steel for EV motors and power generation, and coated steel for construction. Its Tubular segment makes oil country tubular goods (OCTG) and pipe for oil and gas drilling. U. S. Steel operates through four segments: North American Flat-Rolled (integrated steelmaking in Indiana, Pennsylvania, and Illinois), Mini Mill (electric arc furnace operations at Big River Steel in Arkansas), U. S. Steel Europe (integrated steelmaking in Slovakia), and Tubular Products. The company sells primarily through long-term contracts, with spot sales as a supplement. U. S. Steel's profitability depends on the spread between steel prices and input costs, production utilization, and product mix. The company is investing heavily in its Mini Mill segment — including the ~$3.6B Big River Steel 2 facility — to expand lower-cost EAF capacity while rationalizing older integrated plants. U. S. Steel also benefits from captive iron ore operations in Minnesota, which supply its integrated mills and generate third-party sales of surplus pellets.