Nello L. Teer Company was a privately owned General Contracting firm founded in 1909 by Nello Leguy Teer. The Nello L. Teer Company was headquartered in Durham, North Carolina and grew to be one of the largest construction companies in the world. Koppers of Pittsburgh, Pennsylvania purchased the Nello L. Teer Company and today much of the aggregate assets are part of Lehigh Hanson - HeidelbergCement in North America, rail assets are part of CSX, the road construction aspects are held within the Colas Group, and some of the real estate management aspects were transferred to Teer Associates.