Jonas Bonnier to Step Down as CEO of Bonnier AB: Jonas Bonnier is stepping down as CEO of Stockholm-based Bonnier AB, parent to the U.S.-based Bonnier Corporation and divisions in 17 other countries. Bonnier, who became CEO in 2008, will officially transition out at the end of 2013, at which point he'll head to the U.S. to continue overseeing Bonnier Corp. as chairman of the board, a role he's had since 2007.