Sebastian Heinzel

Heinzel Holding GmbH manufactures paper products. Its products include pulp, waste paper, and paper sale; pulp, paper, and containerboard. The company is headquartered in Vienna, Austria.

i5invest Beratugns GmbH invests in mobile and internet businesses. It invests in Information Technology or telecommunications sectors primarily, in B2C web 2.0 businesses focusing on mobile Internet services, energy/enviromental service platforms, user-generated content or traffic solutions, directory services, healthcare platforms, home automation, and entertainment platforms. The company was founded in 2007 and is headquartered in Vienna, Austria.

SPIEGEL ONLINE GmbH provides magazine and books publishing services. The company was founded on October 25, 1994 and is headquartered in Hamburg, Germany.

Zeitverlag Gerd Bucerius GmbH & Co. KG engages in the publication of newspapers and magazines. The company is headquartered in Hamburg, Germany.

tripwolf GmbH provides online travel guide services. The firm's application is also available on mobile phones as a travel application. It combines traditional travel information from travel guides such as 'Marco Polo' and 'Footprint' with up-to-the-minute, high-quality travel tips from thousands of travelers from around the world. The company was founded in 2008 and is headquartered in Vienna, Austria.