Omnicom named world's most effective holding group in 2024 effie index®

New york , june 5, 2025 /prnewswire/ -- omnicom (nyse: omc) has been named the most effective holding group in the 2024 effie index®, the leading global ranking of marketing effectiveness. this marks the second year in a row -- and third time in four years -- that omnicom has earned this top honor.
OMC Ratings Summary
OMC Quant Ranking