 At the end of 2011, Hartmut Ostrowski suddenly announced that he was leaving Bertelsmann for unspecified personal reasons.In 2012, Bertelsmann went from being an AG to its current incorporation as a partnership limited by shares ("Kommanditgesellschaft auf Aktien" or "KGaA"), with the general partner being a European stock corporation ("Societas Europaea" or "SE").Also, since 2012, Thomas Rabe has been chairman and chief executive officer of Bertelsmann.