Transnet SOC Ltd is a large South African rail, port and pipeline company, headquartered in the Carlton Centre in Johannesburg. It was formed as a limited company on 1 April 1990. A majority of the company's stock is owned by the Department of Public Enterprises, or DPE, of the South African government. The company was formed by restructuring into business units the operations of South African Railways and Harbours and other existing operations and products.