Eagle Materials is perched near the top of the building materials business. The company manufactures and distributes cement and gypsum wallboard, which together account for nearly 75% of its total sales. Eagle Materials also produces ready-mix concrete, aggregates, and recycled paperboard. Its products are sold to residential, commercial, and industrial construction customers throughout the US. The company operates about 25 plants and manufacturing facilities. It also has about 100 railcars for shipping its wallboard products to customers across the country. Founded in 1963, Eagle Materials was spun off by homebuilder Centex Corporation in 2004.