Interpublic to Havas in Play as Deal Fever Hits Ads

Interpublic to Havas in Play as Deal Fever Hits Ads

Balint Porneczi/Bloomberg

Maurice Levy, chief executive officer of Publicis Groupe SA, left, and John Wren, chief executive officer of Omnicom Group Inc., exchange pens while signing the merger during a news conference held on the rooftop of the Publicis headquarters in Paris on July 28, 2013.