EGS Beteiligungen expands its majority holding in Bauwerk Boen Group EGS Beteiligungen AG, a subsidiary of the Ernst Göhner Foundation, takes over the remaining shares of Bauwerk Boen Group from Johan G. Olsen Group, a Norwegian-based holding company, thereby expanding its majority position to 98% Press Release | Friday, October 25, 2019 By Bauwerk Boen Group Download the press release here.