The Belgian iron and steel producing company Ougrée-Marihaye was formed in 1835 by the merger of the iron and steel works in Ougrée in Liège Province, and the coal mines of Marihaye. The company merged with the Société anonyme John Cockerill in 1955 to form Cockerill-Ougrée.

Cockerill-Sambre was a group of Belgian steel manufacturers headquartered in Seraing, on the river Meuse, and in Charleroi, on the river Sambre. The Cockerill-Sambre group was formed in 1981 by the merger of two Belgian steel groups – SA Cockerill-Ougrée based at Seraing in the province of Liège, and Hainaut-Sambre based at Charleroi in the province of Hainaut – both being the result of post-World War II consolidations of the Belgian steel industry.