Omnicom’s 456th-Ranked $260M Volume Drives 0.37% Dip as $13.25B Merger Clears Key Hurdle

Omnicom Group (OMC) closed on August 7, 2025, with a 0.37% decline, trading on $260 million in volume, ranking 456th in market activity for the day. The stock’s movement followed regulatory developments regarding its landmark acquisition of Interpublic Group.

Britain’s Competition and Markets Authority (CMA) announced it would not escalate its review of the $13.25 billion all-stock merger between Omnicom and Interpublic to a more intensive phase 2 probe. This decision removes a key regulatory barrier, paving the way for the creation of the world’s largest advertising and marketing agency. The deal, initially announced in December 2024, is anticipated to finalize by mid-2025. The CMA had launched an initial investigation in June to assess potential antitrust risks in the UK market. Separately, the U.S. Federal Trade Commission had approved the merger in late June under conditions restricting the combined entity’s influence on ad spending based on political content.

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