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Rentrop Investment Office (RIO), locally known as Rentropsche Vermögensverwaltung, is an independent German multi-family office which was founded by Norman Rentrop in 1975. The firm operates as part of the family office which manages the wealth of the Rentrop family. The family traces their history to 1510 in Southern Westfalia and is spread across Germany and the US. Headquartered in Bonn, RIO also manages separate portfolios.

Part of Ganske Verlagsgruppe GmbH, Gräfe und Unzer Verlag GmbH is a leading German-language guidebook brand based in Munich, Germany. The CEOs of the German company are Thomas Ganske, Ulrich Ehrlenspiel, David Gottscheber. The company is known for its quality and innovative guidebooks, which are available in various retail outlets. In addition to guidebooks, the company also offers creative and cross-media content solutions for brands and companies.

mobilcom-debitel GmbH provides telecommunications services. The company is headquartered in Budelsdorf, Germany.

Netzpiloten AG designs online applications to help the users to navigate through the web. It operates through the following segments: social media, mobile network, lifestyle, interviews, link advices, and technology. The company was founded by Wolfgang Stephan Macht in 1998 and is headquartered in Hamburg, Germany.

Exaring AG provides IP entertainment services. The company is headquartered in Munchen, Germany.

debitel AG provides mobile & fixed-line telecommunications services, internet and data services. It is a network-independent telecommunications company that offers mobile telephony, fixed-line telephony and the internet. It does all of this by purchasing capacity from various network operators, which it then supplements and combines to create its own products and packages. It works in Germany with the mobile telephony operators like T-Mobile, Vodafone and E-Plus. The company was founded in 1991 and is headquartered in Stuttgart, Germany.

GVG Solutions GmbH develops applications for electronic travel guides and travel advice. The private company is based in Hamburg, Germany. The CEOs of the German company are Sebastian Ganske, Carsten Tegeler.

Ravensburger Interactive Media GmbH is based in Ravensburg, Germany. Part of Embracer Group AB, Ravensburger Interactive Media GmbH is a German company that produces the game "kakerlakak" where players try to catch the most cockroaches by cleverly manipulating cutlery. Ravensburger Interactive Media was acquired by JoWooD Entertainment AG from Ravensberger Bau-Beteiligungen AG on May 16, 2002.

Part of International Masters Publishers Holding AB, NE GmbH provides educational resources and tools for students to develop media literacy skills. The company is based in Munich, Germany. The CEOs are Alf Lennart Tönnesson, Martin Tönnesson. The German company was founded in 1998.

Ströer Management SE is a private company based in Cologne, Germany. The CEOs of the German company are Udo Müller, Christian Schmalzl. The company provides management services.

gamigo AG engages in the development, publishing, and distribution of online and mobile games. The firm’s portfolio of gaming titles includes ArcheAge, Trove, Aura Kingdom, Desert Operations, Fiesta Online, Defiance 2050, Ironsight, RIFT, Echo of Soul, Grand Fantasia, Eden Eternal, Wargame 1942, Kings and Legends, Shaiya, and Twin Saga. The company was founded in 2000 and is headquartered in Hamburg, Germany.

Media Broadcast GmbH provides television, media and entertainment services. Its services include television solutions, network services, radio and event broadcasting, satellite systems, and internet services. The company was founded in 1961 and is headquartered in Cologne, NW.

Part of freenet AG, Freenet Digital, LLC is a company that provides mobile video service and entertainment platforms. The company is based in Sherman Oaks, CA. The CEO of the company is Christoph Vilanek. Freenet Digital was acquired by freenet Cityline GmbH from Jesta Group Corp. on January 15, 2014.

Part of PEH Wertpapier AG, GRAVIS Computervertriebsgesellschaft mbH is a leading Apple retailer in Germany, offering a wide range of Apple products including Mac, MacBook, iPad, Watch, TV, and iPhone. GRAVIS Computervertriebsgesellschaft mbH is based in Berlin, Germany. The German company provides technical support, service offers, and attractive specials both online and in 40 physical stores across the country. The company was founded by Archibald Horlitz, and the CEOs are Jochen Otterbach and Jan Sperlich. In 2013, the company was acquired by mobilcom-debitel GmbH.

High-Tech Gründerfonds Management GmbH (HTGF) is a venture capital firm founded in 2005. The firm is headquartered in Bonn, Germany.

StyleRemains GmbH operates an online retail shopping platform. The firm specializes in the management of a web-based marketplace that offers second-hand luxury and designer fashion items. Its product categories encompass clothing, shoes, bags, leather goods, and fashion accessories. The company was founded by Sophie-Cécile Gaulke and Max Laurent Schönemann in August 2013 and is headquartered in Hamburg, Germany.

EUREF AG is an architectural services company based in Berlin, Germany. EUREF AG provides architectural services. The CEO of the German company is Reinhard Muller.

Verlag Norman Rentrop operates as an investment company. The company was founded by Norman Rentrop in 1975 and is headquartered in Bonn, Germany.

FiNUM AG provides financial advisory services. It specializes in providing its services for financial institutions. The company is headquartered in Essen, Germany.

Litos Immobilien AG provides real estate services. The company is based in Pocking, Germany. The German company was founded in 2007 by Klaus Trescher. The CEO is Andreas Hauff.

IVG Deutschland Immobilien AG engages in the acquisition, development, and management of commercial real estate properties. The company is headquartered in Bonn, Germany.

Investmentaktiengesellschaft für langfristige Investoren TGV (InvestmentAG-LI) is an independent German investment management firm which was established in 2008 and is based in Bonn. InvestmentAG-LI is affiliated with German professional publisher Rentrop, also known as Verlag für die Deutsche Wirtschaft AG and controlled by Norman Rentrop and his family. In addition to Germany, the publishing group does business in Austria, France, Great Britain, Poland, Romania, Russia, Switzerland and South Africa. InvestmentAG-LI operates in close relationship with fellow affiliate Fiducia Treuhand AG, specialized in advising large institutions regarding equity investments.

FMS Wertmanagement Aoer engages in conducting banking and financial service activities related to winding-up assumed asset portfolio. It acquired the risk positions and non-strategic assets, liabilities, and derivatives of Hypo Real Estate Group. Its portfolio includes loans and securities as well as related derivatives divided into five segments: Public Sector, Structured Products, Commercial Real Estate, Infrastructure, and Workout. The Public Sector segment contains bonds issued by euro zone states, the member states of the European Union as well as the neighboring states of Eastern Europe. The Structured Products segment comprises various types of asset-backed securities such as structured securities related to commercial and residential real estate as well as structured bonds that are based on public sector loan receivables or bundled student loans. The Commercial Real Estate segment consists of performing financial products related to commercial real estate. The Infrastructure segment contains financing packages for international infrastructure projects. The Workout segment comprises non-performing real estate loans in Europe, Asia, and the United States, most of which are collateralized. The company was founded on July 8, 2010 and is headquartered in Munich, Germany.

AVECO Holding AG engages in the provision of airport, facility management, and industrial services. The airport services include ground handling, aircraft cleaning, and cargo handling. The facility management services encompass building technology, cleaning, security, catering, and garden maintenance. The industrial services involve building, ventilation, and electrical engineering; maintenance and repair of machines; production support; and logistics. The company was founded by Claus Wisser in 1991 and is headquartered in Frankfurt, Germany.