Dr Martin Widmer, Raphael Oppenheim, Remo Prinz and Ramon Schwarz founded Stailamedia AG in August 2010. Their role in the company is now primarily of a strategic nature.


In September 2008 Widmer, Oppenheim and Prinz set up Serranetga AG. The full-service advertising agency now employs more than 30 staff and is in 15th place in the bsw ranking of Switzerland’s highest turnover advertising agencies. In April 2010, the three founders enhanced the company team by appointing Ramon Schwarz, who has been responsible for the finances since that time. In June 2010 Widmer, Oppenheim, Prinz and Schwarz co-founded Swiss Ad Networks Adwebster AG. They sold their shares in full in January 2012 to the NZZ Media Group. In February 2014 the entrepreneur team established Mediahead AG, which focuses on software solutions for media customers.