Steel Dynamics, Inc.

Steel Dynamics makes steel products used in construction, cars, and heavy equipment. The company operates steel mills that produce different types of steel sheets and bars, and it also runs a large scrap metal recycling business that processes iron, aluminum, copper, and other metals. They make steel components for building construction, like the joists and deck that go into office buildings and warehouses. The company was founded in 1993 and is based in Indiana.