The SIGNAL IDUNA Group offers insurance and financial services. The group was created through the merger of the Dortmund-based Signal Versicherungen and the Hamburg-based Iduna Nova Group on 1 July 1999. The companies of these two groups have been under one management ever since. Ulrich Leitermann has been the Chairman of the Management Board of the Signal Iduna Group since July 2013. Since 1 April 2009, Deutscher Ring Krankenversicherungs-Verein a. G. has also been part of the Signal Iduna Group. In August 2017, it merged with Signal Krankenversicherung a. G., which has since operated under the name Signal Iduna Krankenversicherung a. G.. Within this, Deutscher Ring Krankenversicherung continues to exist as a brand.

Ballspielverein Borussia 09 e. V. Dortmund, often known simply as Borussia Dortmund or by its initialism BVB, is a German professional sports club based in Dortmund, North Rhine-Westphalia. It is best known for its men's professional football team, which plays in the Bundesliga, the top tier of the German football league system. The club have won eight league championships, five DFB-Pokals, one UEFA Champions League, one Intercontinental Cup, and one UEFA Cup Winners' Cup.