Rainer Köhne

Berliner Wasserbetriebe supplies drinking water. Its core task is to supply residents of Berlin and the surrounding area with drinking water and dispose of their wastewater. It operates water works and also provides sewerage services. Not only does it perform conventional wastewater treatment at its wastewater treatment works, but has also equipped the majority with biological nutrient elimination facilities, to maintain the quality of Berlin's lakes and rivers. The company was founded in 1992 and is headquartered in Berlin, Germany.

Berlinwasser Holding GmbH provides water services. The firm engages in disposal and treatment of wastewater. The company was founded in 2000 and is headquartered in Berlin, Germany.

BOTAG Immobilien-Vertriebs-GmbH is a German company that engages in the mediation of land, buildings, and apartments. The private company is based in Berlin, Germany. The CEO of the company is Hans-Jörg Simon.

Part of Berlin Brandenburg Flughafen Holding GmbH, Flughafen Berlin Brandenburg GmbH is a German company that offers a wide range of spaces for project developers and investors. The company is based in Schönefeld, Germany and was founded in 1990. The company's main focus is on airport charges and other charges at Berlin Brandenburg Airport, which includes Tegel, Tempelhof, and Schönefeld. The potential for project developers and investors is diverse, and the company provides information on their official corporate website for journalists, business partners, and neighbors. The CEO is Aletta von Massenbach.