Frank Michael Munkler

Kölner Verkehrs-Betriebe AG provides public transport services. The firm offers train, tram, bus, as well as cable car transportation. Its services include taxis, car sharing, and bicycle rental. The company was founded on May 20, 1877 and is headquartered in Cologne, Germany.

Stadtwerke Köln GmbH engages in the supply and distribution of electricity, natural gas, water, and district heating. It also provides river port, transportation, and public transport systems services. The company was founded in 1960 and is headquartered in Cologne, Germany.

SWK Stadtwerke Krefeld AG operates as a holding company, which engages in the distribution and supply of electricity, water, gas, and heat. The firm also provides waste disposal and transportation services. It operates through the following segments: Energy, Water, Waste Management, Transportation, and Services. The Energy segment comprises electricity, gas, and heat. The Water segment deals with water and sanitation. The Waste Management segment specializes in waste collection. The Transportation segment offers public transport with buses and trams. The Services segment consists of management, control, and infrastructure. The company was founded in 1990 and is headquartered in Krefeld, Germany.