[Form 4] OMNICOM GROUP INC. Insider Trading Activity

Rhea-AI Filing Summary

Leonard S. Coleman Jr., a director of Omnicom Group Inc. (OMC), reported a non-derivative acquisition on 10/01/2025. He deferred receipt of 628.6 shares under the Omnicom Group Inc. 2021 Incentive Award Plan at a $0 price for reporting purposes, increasing his beneficial ownership to 47,375.75 shares. The filing notes that dividends on deferred shares were reinvested and credited on July 9, 2025. The Form 4 was signed on behalf of Mr. Coleman by an attorney-in-fact on 10/03/2025.

Positive

• Director elected to defer compensation into company stock, acquiring 628.6 shares
• Dividends on deferred shares were reinvested, contributing to ownership credited on July 9, 2025

Negative

• None.

Insights

Corporate Governance Analyst

Director deferred 628.6 shares under the company plan, modestly increasing ownership.

The reported transaction shows a director elected to defer receipt of 628.6 shares under the 2021 Incentive Award Plan, recorded as an acquisition at no cash price for Form 4 purposes. This is a routine, plan-driven transaction rather than an open-market purchase.

Because dividends on deferred shares were reinvested and credited on July 9, 2025, the filing discloses a small accumulation of additional shares, bringing total beneficial ownership to 47,375.75 shares. The activity is governance‑related and does not disclose changes to compensation structure or extraordinary grants.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

COLEMAN LEONARD S JR

(Last) (First) (Middle)

C/O OMNICOM GROUP INC.

280 PARK AVENUE

(Street)

NEW YORK NY 10017

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
OMNICOM GROUP INC. [ OMC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.15 per share	10/01/2025		A		628.6(1)	A	$0	47,375.75(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The reporting person elected to defer receipt of these shares under the terms of the Omnicom Group Inc. 2021 Incentive Award Plan.

2. Includes dividends on deferred shares that are reinvested in company stock, credited on July 9, 2025.

	/s/ Eric J. Cleary, Attorney in Fact for Leonard S. Coleman	10/03/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transaction did Omnicom director Leonard S. Coleman Jr. report on Form 4 (OMC)?

Mr. Coleman reported a non-derivative acquisition of 628.6 shares via deferral under the 2021 Incentive Award Plan on 10/01/2025.

How many shares does Leonard S. Coleman Jr. beneficially own after the reported transaction (OMC)?

The Form 4 reports beneficial ownership of 47,375.75 shares following the transaction.

Was there a cash payment recorded for the shares on the Form 4?

No purchase price is reported; the transaction is recorded at $0 because the shares were deferred under the company plan.

Did the filing disclose dividend treatment for the deferred shares (OMC)?

Yes. The filing states dividends on deferred shares were reinvested and credited on July 9, 2025.

Who signed the Form 4 for Leonard S. Coleman Jr.?

The Form 4 was signed by Eric J. Cleary, Attorney in Fact for Leonard S. Coleman on 10/03/2025.