Lutz R. Ristow

Rickmers Holding GmbH & Cie. KG was a holding company with interests in freight shipping and maritime services. The company was founded in June 1834 and was headquartered in Hamburg, Germany.

Bau-Verein zu Hamburg Immobilien GmbH provides property management services. It engages in the provision of real estate development, management and financial services. The firm offers project development, property management and consulting services for third parties, including the marketing of tax-privileged capital investment opportunities in the property sector. The company was founded in 1892 and is headquartered in Hamburg, Germany.

RSE Grundbesitz und Beteiligungs-AG invests in, manages, and trades residential and commercial real estate. The company was founded in 1898 and is headquartered in Frankfurt, Germany.

Founded in 1876, PSP Properties AG is a Swiss real estate company that develops, leases, and manages real estate holdings. Part of PSP Swiss Property AG, the company is based in Zurich, Switzerland. PSP Properties was acquired by PSP Swiss Property AG on April 05, 2004 for $508.01 million.