Omnicom Group Inc. announced it will acquire The Interpublic Group of Companies Inc. in a stock-for-stock deal to form the world's largest advertising agency, with nearly $26 billion in annual revenue. The combined company, valued at over $30 billion, will retain the Omnicom name and trade under the ticker symbol “OMC” on the NYSE. The merger combines iconic campaigns like “Got Milk” and “Think Different.” JPMorgan analysts view the consolidation positively, citing enhanced capabilities across advertising and marketing services.