OMC OMNICOM GROUP INC Company Mergers 8-K Filing 2025 - Merger Announcement Omnicom Group Inc. announced a merger agreement with The Interpublic Group of Companies, Inc. on December 8, 2024, with stockholder meetings scheduled for March 18, 2025, to discuss the merger details.Get access to all SEC 8-K filings of the OMNICOM GROUP INC