---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-272904"
form_type: "8-K"
ticker: "OMC"
cik: "0000029989"
company_name: "OMNICOM GROUP INC."
filed_at: "2024-12-09T23:59:59+00:00"
generated_at: "2026-05-29T05:52:25.068356+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 1.0
calibrated_materiality_score: 1.0
confidence: "high"
source: SEC EDGAR
---

# Omnicom to acquire Interpublic Group in all-stock merger; combined revenue $25.6B, $750M synergies

## Summary
- Interpublic shareholders to receive 0.344 Omnicom shares per IPG share; Omnicom shareholders to own 60.6% of combined entity.
- Transaction expected to generate $750M annual cost synergies and be accretive to adjusted EPS for both sets of shareholders.
- John Wren remains Chairman & CEO of Omnicom; Philippe Krakowsky and Daryl Simm to serve as Co-Presidents and COOs.
- Combined 2023 revenue of $25.6B, Adjusted EBITA $3.9B, free cash flow $3.3B.
- Expected to close in H2 2025, subject to shareholder and regulatory approvals; tax-free to shareholders.

## SEC filing metadata
- accession: 0001193125-24-272904
- form_type: 8-K
- ticker: OMC
- cik: 0000029989
- company_name: OMNICOM GROUP INC.
- filed_at: 2024-12-09T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 1.0
- calibrated_materiality_score: 1.0
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/29989/000119312524272904/0001193125-24-272904-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/29989/000119312524272904/d863026d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-272904
- JSON: https://secwatch.observer/filing/0001193125-24-272904.json
- Plain text: https://secwatch.observer/filing/0001193125-24-272904.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.