IPG INTERPUBLIC GROUP OF COMPANIES INC Company Mergers 8-K Filing 2025 - Merger Approval On March 18, 2025, Interpublic Group's stockholders voted on the proposed acquisition by Omnicom Group, with 87.75% of shares represented; the merger agreement was approved with 325,789,406 votes for it.Get access to all SEC 8-K filings of the INTERPUBLIC GROUP OF COMPANIES INC