Günter Koller

Quantum Immobilien AG has been active in the market since 1999 as a real estate specialist. As an owner-managed and independent real estate group, they unite excellent skills for development and realization, capital-market structuring and management of real estate investments. These are provided through four subsidiaries namely the Quantum Projektentwicklung GmbH, the Quantum Immobilien Kapitalanlagegesellschaft mbH, the Quantum Investment GmbH and the Quantum Grundbesitz GmbH. From their company headquarter in Hamburg, they focus their activities on the metropolitan regions in Germany with an experienced and professional team. Their diverse involvement comprises classic property development, investment consultation, conceptual design, issue and management of special funds, acquisition of property and asset management. This includes the realization of corporate headquarters, residential and industrial property, renewals, development of municipal districts, takeover of inventory properties and portfolios.

Agrar Grasbrunn GmbH & Co. KG provides mixed agriculture services. The private company is based in Grasbrunn, Germany. The CEOs of the German company are Hubertus Löffler, Günter Koller.

6b47 Real Estate Investors AG provides real estate and related services. The firm has locations in Germany, Austria and Poland. The company was founded in 2009 and is headquartered in Vienna, Austria.

Ruppert Vermögensverwaltung Holding GmbH is a private company based in Grasbrunn, Germany. Ruppert Vermögensverwaltung Holding GmbH provides investment advisory services. The German company was founded in 2000 and is led by CEO Günther Koller.

Agrar Grasbrunn Immobilien GmbH is a private company that engages in the purchase and sale of residential land, buildings, and apartments. The company is based in Grasbrunn, Germany. The German company was founded in 2014, and the CEOs are Günter Koller and Hubertus Löffler.