Don Ritzen has made 6 investments in companies such as: Peerby, Ideedock, VideoAvatars, PastBook, Postcron, Nexi.
Location of Don Ritzen is Amsterdam, United States.
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Don Ritzen's investment types are: Angel/Individual. Don Ritzen focuses investing in industries such as: Big Data, Information Technology, Trading, PeertoPeer, Consumer Internet, Enterprise Software, Mobile, Incubators, Social Media, Social Media Platforms, Social Media Marketing, B2B, Information Services, Knowledge Management, Marketplaces, Collaborative Consumption, Online Rental, Small and Medium Businesses, Human Resources, Photo Sharing, Content Summarization, Hardware, Deep Information Technology, Aerospace, Space Travel.