The payment service company Klarna started in 2005 at the Stockholm School of Economics. Now Sebastian Siemiatkowski returns to the incubator SSE Business Lab as chairman of a new Advisory Board consisting of, among others, Cristina Stenbeck (Kinnevik), Katarina Martinson (Lundbergföretagen), Sebastian Knutsson (King.com) and Mikael Schiller (Acne Studios).