Bertelsmann SE & Co. KGaA mulls buying Penguin Random House LLC from Pearson plc (LSE:PSON). Bertelsmann is poised to boost his 53% stake in Penguin Random House after partner Pearson said it plans to sell its 47% share. While Bertelsmann, controlled by Germany’s billionaire Mohn family, hasn’t laid out any specifics, Chief Executive Officer of Bertelsmann, Thomas Rabe says he’s interested in buying out Pearson.