Company History
SGL Carbon AG originated in 1992 from a merger between SIGRI GmbH (Germany) and Great Lakes Carbon (USA) to share a company according to German law. Since March 2007, SGL Carbon AG has operated on the market as SGL Group - The Carbon Company.
SIGRI traced back to Gebr. Siemens & Co (Gesco), founded in Berlin as a subsidiary of Siemens AG in 1878. The company originally produced carbon. In 1920, the company set up a plant in Meitingen (Bavaria) and in 1928 merged with Planiawerke AG für Kohlefabrikation in Ratibor (Upper Silesia) to form the new Siemens Planiawerke AG für Kohlefabrikate. After the Second World War, the Meitingen plant of the Siemens Planiawerke AG für Kohlefabrikate merged with Chemische Fabrik Griesheim to form Siemens Plania Chemisches Werk Griesheim, the majority of which was acquired by Hoechst AG in 1953. In 1967, as a result of the merger with electrode manufacturing at Hoechst AG, Siemens Planiawerke AG für Kohlefabrikate also became a majority holding of the chemical company. There it was amalgamated with the Siemens Plania Chemisches Werk Griesheim and other enterprises of Hoechst AG. In 1985 it was renamed SIGRI GmbH and finally Hoechst AG acquired total ownership in 1989.
After the merger with Great Lakes Carbon, Hoechst AG retained a 50 percent stake in the new company. The remaining participation was sold in 1996 as part of restructuring of the Hoechst Group. Since then SGL Carbon AG has been widely held.
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