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Omnicom Group Investor Sues Over Publicis Groupe Merger

An Omnicom Group Inc. investor sued to stop the company’s proposed merger with Publicis Groupe SA, a combination that would create the world’s biggest advertising company, saying the terms are unfair to Omnicom shareholders.

Shareholder Paul Ansfield filed the suit in New York State Supreme Court against Omnicom, its board and Publicis over the transaction, which was unveiled on July 29. Pending regulatory and stockholder approvals, the deal is expected to be completed by the first quarter of 2014.