Mark D. Gerstein - 01 Jul 2026 Form 4 Insider Report for OMNICOM GROUP INC. (OMC)

Reporting relationship: Director
Issuer ticker: OMC
Reported as of: 01 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Jul 2026, 16:30:15 UTC
Prior SEC filing: 03 Apr 2026
Source filing: View source filing
Reporting owner signature: /s/ Eric J. Cleary, Attorney in Fact for Mark D. Gerstein

Key filing fact

Mark D. Gerstein filed Form 4 for OMNICOM GROUP INC. (OMC) on 06 Jul 2026.

Key facts

This page summarizes Mark D. Gerstein's Form 4 filing for OMNICOM GROUP INC. (OMC).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 06 Jul 2026, 16:30.

Change

Previous filing in this sequence was filed on 03 Apr 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001916341 Primary reporting owner

Gerstein Mark D

Relationship: Director
Address: C/O OMNICOM GROUP INC., 280 PARK AVENUE, NEW YORK
Signature: /s/ Eric J. Cleary, Attorney in Fact for Mark D. Gerstein
Signature date: 06 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OMC transaction

Common Stock, par value $0.15 per share

Award

Transaction value
Shares: +704
Change %: +4.6%
Price: $0.000000^*
Shares after: 16,023
Date: 01 Jul 2026
Ownership: Direct
Footnotes: F1, F3

OMC transaction

Common Stock, par value $0.15 per share

Award

Transaction value
Shares: +309
Change %: +1.9%
Price: $0.000000^*
Shares after: 16,332
Date: 01 Jul 2026
Ownership: Direct
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The reporting person elected to defer receipt of these shares under the terms of the Omnicom Group Inc. 2026 Incentive Award Plan.

Footnote F2

The reporting person elected to defer receipt of these shares, which represent a quarterly payment of his annual retainer, under the terms of the Omnicom Group Inc. 2026 Incentive Award Plan.

Footnote F3

Includes dividends on deferred shares that are reinvested in company stock, credited on April 9, 2026.