The GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt operates a worldwide leading accelerator facility for research purposes.
About 1,520 employees are working at GSI. In addition, every year approximately 1,000 researchers from universities and other research institutes around the world come to GSI to use the facility for experiments.
GSI is a limited liability company (GmbH). Shareholders are the German Federal Government with 90 %, the State of Hesse with 8 %, the State of Rhineland-Palatinate and the Free State of Thuringia with 1 % each. They are represented in the GSI supervisory board by the Federal Ministry of Education and Research and the respective state ministries. GSI is a member of the Helmholtz Association, Germany's largest research organization.