Omnicom files unaudited pro forma financials for combined entity at SEC

The Omnicom group has formally filed unaudited pro forma financial statements with the U.S. Securities and Exchange Commission (SEC) on Wednesday, offering the first detailed, regulatory-compliant snapshot of the merged entity that will result from its acquisition of Interpublic Group (IPG). 

The filing — a key requirement under SEC rules for significant business combinations — clearly signals that the companies are already aligning their financial and debt structures in readiness for Day-One integration. 

According to the filing, these financials are “illustrative only” and exclude any cost-savings or post-close integration expenses, meaning the real combined results could differ materially once operations, synergies and restructuring costs play out. 

“The pro forma statements adjust historical financials from both companies as if the merger had been completed on January 1, 2024 (for income statements) and June 30, 2025 (for the balance sheet),” said an expert. They reflect Omnicom’s adoption of the acquisition method of accounting, with IPG fully consolidated into the new structure and all shares converted at the agreed ratio, he adds. 

At the same time, Omnicom has commenced a US $2.95 billion note-exchange offer for IPG’s outstanding senior notes — effectively refinancing IPG debt under the merged entity’s credit structure. The exchange, alongside necessary consent solicitations, is explicitly conditioned on the completion of the merger, underscoring how deeply debt-restructuring is tied to the consolidation timeline. 

With both financial and capital-markets mechanics already in motion, the companies appear to be shifting from pre-merger planning to full-scale structural execution.

For the global advertising industry, this filing turns speculation into clarity. The merged entity — expected to generate roughly US $25 billion in annual topline revenue and emerge as the largest agency holding company globally — now has a publicly declared baseline. That baseline provides clients, competitors, analysts and regulators with a starting point to gauge the scale of transformation ahead. 

Still, experts caution that the pro forma data should be interpreted carefully. Because the adjustments are preliminary and exclude integration costs, optimised headcount, synergy realisation and consolidated operational expenses, they do not equate to future performance.