Stefan Giesler

Part of Deutsche Bank AG, OPB-Holding GmbH is a German company that provides professional, scientific and technical services. The company is based in Cologne, Germany. The CEO of the company is Stefan Giesler.

Prime Office REIT-AG is a real estate investment trust which engages in the investment, management, and administration of office properties. It is primarily focusing on investments in office buildings in Germany as well as their facility and property management. The company also focuses on off market transactions and re-letting of properties. Its portfolio consists of modern office and administration buildings. Prime Office REIT was founded on August 4, 2000 and is headquartered in Munich, Germany.

Part of Vistra Group Ltd., Vistra GmbH & Co. KG Wirtschaftsprüfungsgesellschaft is a company based in Cologne, Germany. The German company specializes in helping investments grow and succeed internationally, providing investment and transaction services. The company has experts in fund services and private equity who can navigate local regulations and nuances in over 45 jurisdictions throughout the funds lifecycle. The company was founded in 2009 and has Kerstin Bors, Joachim Buchau, and Peter Lenz as CEOs. Vistra GmbH & Co. KG Wirtschaftsprüfungsgesellschaft was acquired by Vistra SA on April 03, 2017.