---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-24-273512"
form_type: "8-K"
ticker: "OMC"
cik: "0000029989"
company_name: "OMNICOM GROUP INC."
filed_at: "2024-12-09T23:59:59+00:00"
generated_at: "2026-05-29T05:53:08.272040+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.9
calibrated_materiality_score: 0.9
confidence: "high"
source: SEC EDGAR
---

# Omnicom to acquire Interpublic in stock-for-stock merger; IPG holders get 0.344 OMC shares per share

## Summary
- Each IPG share converts to 0.344 Omnicom shares; stock options and restricted stock assumed or converted to cash.
- Omnicom board expands by three IPG directors; IPG CEO Philippe Krakowsky becomes Co-President and Co-COO.
- Merger requires approval from both companies' stockholders, antitrust clearance, and other customary conditions.
- Termination fees: Omnicom pays $676M if it changes recommendation; IPG pays $439M for similar breach.
- Expected close by Dec 8, 2025 (extendable to Jun 8, 2026); structured as tax-free reorganization for US federal tax.

## SEC filing metadata
- accession: 0001193125-24-273512
- 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: neutral
- materiality_score: 0.9
- calibrated_materiality_score: 0.9
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/29989/000119312524273512/0001193125-24-273512-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/29989/000119312524273512/d905190d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-24-273512
- JSON: https://secwatch.observer/filing/0001193125-24-273512.json
- Plain text: https://secwatch.observer/filing/0001193125-24-273512.txt

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