[Form 4] Omnicom Group Inc. Insider Trading Activity

Rhea-AI Filing Summary

Daryl Simm, President and COO of Omnicom Group Inc. (OMC), reported a sale of 7,818 shares of common stock on 08/15/2025 at an average price of $76.31 per share. After the transaction he beneficially owns 167,283 shares (direct). The Form 4 was signed by an attorney-in-fact on 08/19/2025.

Positive

• Continued ownership: Reporting person retains 167,283 shares after the sale, indicating ongoing alignment with shareholders
• Timely and proper reporting: Form 4 filed with signature by attorney-in-fact, showing compliance with Section 16 reporting requirements

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: A routine insider sale by a named executive with continued substantial ownership; not immediately indicative of governance issues.

The reported sale by the President and COO reduced his holdings by 7,818 shares on 08/15/2025 at $76.31. Remaining direct beneficial ownership of 167,283 shares suggests continued alignment with shareholders. No option exercises, derivative transactions, or plan-based notations are included, and the filing appears procedural and timely.

Securities Analyst

TL;DR: Insider sale is notable but below common bright-line material thresholds and appears routine.

The transaction represents a discrete sale rather than a disposition of all holdings; without additional context on volume relative to average daily trading or any clustering of related sales, this single Form 4 is a neutral data point for investors. The clear reporting and signature by an attorney-in-fact indicate proper Form 4 procedures were followed.

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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Simm Daryl

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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	08/15/2025		F		7,818	D	$76.31	167,283	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:

	/s/ Eric J. Cleary, Attorney in Fact for Daryl Simm	08/19/2025
	** 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 did Omnicom (OMC) insider Daryl Simm report on Form 4?

The filing reports a sale of 7,818 shares of Omnicom common stock on 08/15/2025 at an average price of $76.31 per share.

How many Omnicom shares does Daryl Simm own after the reported transaction?

After the sale, Daryl Simm beneficially owns 167,283 shares (direct ownership).

What was the price per share for the sale reported on the Form 4?

The transaction price reported was $76.31 per share on 08/15/2025.

Who signed the Form 4 for Daryl Simm and when?

The Form 4 was signed by Eric J. Cleary, Attorney in Fact for Daryl Simm on 08/19/2025.

Does the Form 4 show any derivative or option transactions for Daryl Simm?

No. The filing contains only a non-derivative common stock sale; Table II for derivatives is empty.