Home Business Italy's Mediaset buys 9.6% stake in German broadcaster ProsiebenSat1 Business Italy's Mediaset buys 9.6% stake in German broadcaster ProsiebenSat1 By Genpie - May 29, 2019 192 0 Facebook Twitter Google+ Pinterest WhatsApp Mediaset has bought a 9.6% stake in German peer Prosiebensat1, the Italian private broadcaster said on Wednesday.