Холдингові компанії
Johann J. Köster GmbH
Holding and Administration
Aurich - Germany
100%
KOESTER AMERICAN PROPERTIES, LLC
Real Estate
MD: Johann J. Köster
Virginia Beach - USA
100%
Folkerts & Köster GbR
Holding and Administration
MD: H. Folkerts, J. Köster, R. Pantel
Aurich - Germany
50%