Arthur Sadoun has been promoted to head Publicis Groupe's largest ad network, Publicis Worldwide. Sadoun replaces Jean-Yves Naouri, who will remain the chief operating officer of Publicis Groupe. With the Publicis-Omnicom merger awaiting approval, the move sets up Sadoun as "one of a number of execs who could be in line within ... five years to run the merged company," Rupal Parekh writes.

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