Klaus is Founder of Lakestar and one of the leading European business angels with investments in some of the largest European and worldwide internet companies of the last years. He was an early investor in companies such as QXL/Tradus, Skype, Facebook, king.com, Xing, airbnb and Spotify (including board membership). Klaus started his career at Bertelsmann. He joined AOL Germany as one of the first employees in 1995, where he was board member before being a partner at Benchmark Capital.
Klaus graduated with a Master's degree in Business Administration from University of Fribourg in Switzerland and holds a PhD degree („summa cum laude“) in Finance from the same university.
He was named "most successful European entrepreneurial private investor of the year" in 2006 by a group comprised of IESE, INSEAD and the University of St Gallen.
In 2011, Klaus was named the NOAH Internet Investor of the year. In 2013, Forbes ranked him first among European investors on the 2013, 2014 & 2015 MIDAS list.