Publicis-Omnicom Romance Ruined After Levy Clashed With Wren

Publicis-Omnicom Romance Ruined After Levy Clashed With Wren

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Omnicom CEO John Wren, left, and Publicis CEO Maurice Levy on the floor of the New York Stock Exchange, on July 29, 2013, a day after announcing that their companies will merge to form the world's largest advertising holding company.