Mediaset, a mass media company, agreed to acquire an additional 5.5% stake in ProSiebenSat.1, a European mass media company, for $187m, raising its stake to 15%. "The friendly acquisition of a stake in ProSiebenSat.1 is a long-term choice, aimed at creating value with an increasingly international outlook. It strengthens our existing industrial relationship. Mediaset is proud to invest in the future of free-to-air European television. And it is with the future precisely in mind, that the Mediaset Group, by becoming a shareholder of ProSiebenSat.1, confirms its esteem for the current management," Pier Silvio Berlusconi, Mediaset Chief Executive Officer. Mediaset increases stake in ProSiebenSat.1 to 24.9% on April 23.