| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Simm Daryl | President and COO | C/O OMNICOM GROUP INC., 280 PARK AVENUE, NEW YORK | /s/ Eric J. Cleary, Attorney in Fact for Daryl Simm | 19 Aug 2025 | 0001303840 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | OMC | Common Stock, par value $0.15 per share | Tax liability | $596,592 | -7,818 | -4.5% | $76.31 | 167,283 | 15 Aug 2025 | Direct |