leading German metals, engineering, and manufacturing company founded in 1999 through the merger of Krupp (Krupp AG) (Fried. Krupp AG Hoesch-Krupp) and Thyssen (Thyssen AG) (Thyssen Industrie AG). The two companies combined at a time of consolidation among many steel companies in Europe and the United States. ThyssenKrupp's headquarters are in Düsseldorf.