Omnicom Group Inc. filed a Form 8-K regarding its planned merger with The Interpublic Group of Companies (IPG). The merger agreement, approved by both companies' boards, will merge IPG into a wholly owned subsidiary of Omnicom. In connection with this, Omnicom and IPG have filed a joint proxy statement and are holding special stockholder meetings on March 18, 2025, to vote on the merger.

Since the merger announcement, three lawsuits have been filed by stockholders of both companies, alleging disclosure deficiencies in the joint proxy statement. To mitigate risks and avoid delays, Omnicom and IPG have voluntarily supplemented the proxy statement with additional disclosures, though they deny any wrongdoing.

The supplemental disclosures provide details about the merger negotiations, financial projections, and expected synergies. They also outline the roles of financial advisors PJT Partners and Morgan Stanley, governance changes, and executive compensation arrangements. The filing includes cautionary statements about forward-looking risks and legal disclaimers.

Omnicom and IPG continue to urge stockholders to review the registration statement and proxy materials before making voting or investment decisions. The merger is subject to stockholder and regulatory approvals, and no assurances can be made about its successful completion.