Salzgitter AG is a German company, one of the largest steel producers in Europe with an annual output of around 7 million tonnes.

The company was founded in 1937 as Reichswerke Hermann Göring, which went on to become the largest German economic enterprise in the Third Reich along with I.G. Farben and Vereinigte Stahlwerke AG. The Reichswerke were liquidated in 1953. Its legal successor became the state owned AG für Bergbau- und Hüttenbetrieb, renamed Salzgitter AG in 1961. During the 1960s, the company was the largest state owned corporation in the world. It went public on the German Stock Exchange in 1998.

With over 100 subsidiaries and associated companies, the Group is structured in five divisions – Steel, Trading, Tubes, Services and Technology – under the umbrella of a management holding company.

The Group's principal activity is to manufacture steel and associated products. The products include heavy profile steel sheets, hot-rolled wide strips and steel strips, heavy and medium weight plates, sheet steel, and trapezoidal sheeting. The company also owns 20% of Norddeutsche Affinerie which is the largest copper producer in Europe and as well the largest copper recycler worldwide.