Gerhard Langemeyer

KEB Holding AG is a German company that provides securities brokerage services. It is based in Muenster, Germany and ultimately controlled by the City of Dortmund. The company was founded in 2002.

Portigon AG engages in the management of its own assets. It also provides financial services and conducts banking activities. The company was founded in 1969 and is headquartered in Duesseldorf, Germany.

Sparkasse Dortmund provides commercial banking services. The bank offers telephone and online banking, brokerage, personal and home loans, real estate lending, and depositary services. It provides services through a chain of 130 branches. Sparkasse Dortmund was founded on January 14, 1841 and is headquartered in Dortmund, Germany.

Dortmunder Stadtwerke AG provides urban development and transportation services for the city of Dortmund. The firm, through its subsidiaries, also provides energy and telecommunication services. The company was founded on June 18, 1857 and is headquartered in Dortmund, Germany.