Stock award lifts Omnicom (NYSE: OMC) director shareholdings

Rhea-AI Filing Summary

Santos Cassandra reported acquisition or exercise transactions in this Form 4 filing.

OMNICOM GROUP INC. director Cassandra Santos received a grant of 680.5200 shares of common stock on April 1, 2026, reported at a price of $0.0000 per share as a compensation award. Following this grant, she directly holds 5,837.2000 shares. She elected to defer receipt of these shares under the Omnicom Group Inc. 2026 Incentive Award Plan, and the position also includes dividends on deferred shares that were reinvested in company stock and credited on January 9, 2026.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Santos Cassandra

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, par value $0.15 per share	680.52	$0.00	--

Holdings After Transaction: Common Stock, par value $0.15 per share — 5,837.2 shares (Direct)

Footnotes (1)

1. The reporting person elected to defer receipt of these shares under the terms of the Omnicom Group Inc. 2026 Incentive Award Plan. Includes dividends on deferred shares that are reinvested in company stock, credited on January 9, 2026.

Key Figures

Shares granted: 680.5200 shares Holding after grant: 5,837.2000 shares Grant price: $0.0000 per share +1 more

4 metrics

Shares granted 680.5200 shares Common stock award on April 1, 2026

Holding after grant 5,837.2000 shares Total common shares directly held after transaction

Grant price $0.0000 per share Reported value for compensation grant

Dividend credit date January 9, 2026 Dividends on deferred shares reinvested in stock

Key Terms

Incentive Award Plan, deferred shares, dividends on deferred shares, reinvested in company stock

4 terms

Incentive Award Plan financial

"under the terms of the Omnicom Group Inc. 2026 Incentive Award Plan"

An incentive award plan is a formal program that rewards employees, executives, or directors with cash, stock, options, or other pay when the company meets set goals or performance targets. Like a sales commission or a loyalty program that pays out when you hit milestones, it’s designed to align staff behavior with company objectives; investors care because it affects a company’s costs, share count (dilution), leadership incentives, and long-term value creation.

deferred shares financial

"elected to defer receipt of these shares under the terms"

dividends on deferred shares financial

"Includes dividends on deferred shares that are reinvested in company stock"

reinvested in company stock financial

"dividends on deferred shares that are reinvested in company stock"

Form 4 Insider Transactions: What Each Field Means →

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^*

Santos Cassandra

(Last) (First) (Middle)

C/O OMNICOM GROUP INC.

280 PARK AVENUE

(Street)

NEW YORK NEW YORK 10017

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

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

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

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

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	04/01/2026		A		680.52(1)	A	$0	5,837.2(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. 2026 Incentive Award Plan.

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

	/s/ Eric J. Cleary, Attorney in Fact for Cassandra Santos	04/03/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Omnicom (OMC) director Cassandra Santos report?

Cassandra Santos reported receiving a grant of 680.5200 shares of Omnicom common stock. The award was recorded at $0.0000 per share as part of her compensation, increasing her directly held position to 5,837.2000 shares after the transaction.

Was the Omnicom (OMC) stock award to Cassandra Santos a market purchase?

The 680.5200 Omnicom shares were a grant, not a market purchase. They were recorded at $0.0000 per share as a compensation award, reflecting an acquisition under the company’s incentive plan rather than an open‑market buy or sell transaction.

How many Omnicom (OMC) shares does Cassandra Santos hold after this Form 4?

After the reported award, Cassandra Santos directly holds 5,837.2000 Omnicom common shares. This total includes the 680.5200-share grant on April 1, 2026 and reflects prior deferred awards with dividends reinvested in company stock credited earlier in 2026.

What is the Omnicom Group Inc. 2026 Incentive Award Plan mentioned in the Form 4?

The Omnicom Group Inc. 2026 Incentive Award Plan is the program under which Cassandra Santos’s 680.5200-share award was granted. She elected to defer receipt of these shares under this plan, meaning the compensation is delivered in deferred Omnicom stock rather than immediate cash.

How are dividends handled on Cassandra Santos’s deferred Omnicom (OMC) shares?

Dividends on Cassandra Santos’s deferred Omnicom shares are reinvested in company stock. The filing notes that dividends on deferred shares were credited on January 9, 2026, increasing her deferred stock position through additional Omnicom shares rather than cash payouts.