After a relatively quiet period in his creeping takeover of U.K.-based Aegis Group, French financier Vincent Bollore has boosted his stake once again, raising it to 26.03 percent of Aegis shares from
25.8 percent. Bollore, who also controls a 25.4 percent stake of Paris-based Havas, leveraged his holdings to become chairman of that agency holding company, and has been wrestling with Aegis'
management team for a seat on its board.