Key Points Omnicom Group acquires Interpublic Group for $13.25 billion, forming the largest advertising agency globally. Interpublic shareholders will receive 0.344 Omnicom shares per share, reflecting a 21.6% premium. The merged entity’s annual revenue will exceed $25 billion, surpassing competitors WPP and Publicis. The deal is set to close in 2025, with anticipated annual cost savings of $750 million. Omnicom Group has announced a $13.25 billion all-stock acquisition of rival Interpublic Group, aiming to create the world’s largest advertising agency...