Omnicom to buy Interpublic, creating ad agency giant with nearly $26 billion in annual revenue

US ABC News: USOmnicom is buying Interpublic Group in a stock-for-stock deal that will create an advertising powerhouse with combined annual revenue of almost $26 billion

​Omnicom is buying Interpublic Group in a stock-for-stock deal that will create an advertising powerhouse with combined annual revenue of almost $26 billion  

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