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Omnicom-Interpublic ‘powerhouse’ seen to have constraints in UK

By Jon Menon ( August 26, 2025, 12:49 GMT | Insight) -- Omnicom Group’s acquisition of Interpublic Group would create the largest supplier of media-buying services in the UK — with as much as 40 percent of the market — though would still be constrained by rivals, the Competition and Markets Authority said. The CMA today published the report on its decision announced earlier this month to clear the deal following an initial phase I investigation.Omnicom Group’s acquisition of Interpublic Group would create the largest supplier of media-buying services in the UK, though it would still be constrained by rivals, the national antitrust regulator said....

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