Sonae Sierra is an international real estate company with offices in 13 countries, specialising in investors in retail properties and their needs. The company develops and invests in sustainable retail properties and offers services in the areas of investment, development and property management.

Sonae Sierra owns 44 shopping centres with a market value of €6 billion. The company is also responsible for managing and/or leasing 85 shopping centres with a total of 2.3 million m2 of lettable area (GLA) and approximately 9,000 tenants.


Union Investment is one of Europe’s leading real estate investment managers. Our range of solutions includes open property funds and special funds and service and bundling mandates with a current volume of more than €31 billion.

Union Investment has stood for predictive real estate investments for more than 50 years. We provide our investors with a stable and effective platform that combines high-performance real estate purchases with a value-based asset management approach. Our diversified real estate portfolio stretches over 24 countries and five continents and consists of more than 320 objects in the segments office, hotel, retail and logistics. With a transaction volume of €5 billion, Union Investment was again among the most active European investment actors in 2015. Our diversified European retail portfolio, with a volume of around €7.5 billion, currently includes 46 properties, including ALEXA in Berlin, CityQuartier Fünf Höfe in Munich and Palladium in Prague.

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21media is a marketing and advertising agency that specialises in shopping centres within the range of retail real estate. The agency was founded in Oberhausen and has more than 20 years of experience—from positioning, to campaign conception to implementing various measures. 21media is among the leading agencies, particularly with regard to B2B communication—that is, supporting owners and operators in marketing their properties and in forming new collaborations and deals.

21media has repeatedly won the ICSC European Marketing Award—including the Best of The Best Viva Award, which is handed out annually in Las Vegas.