Omnicom Group (NYSE: OMC) shows State Street’s passive 13.8% equity stake

Rhea-AI Filing Summary

Omnicom Group Inc. has a large institutional shareholder disclosure from State Street Corporation and its affiliate SSGA Funds Management, Inc. on a passive basis. As of November 30, 2025, State Street reports beneficial ownership of 26,656,167 shares of Omnicom common stock, representing 13.8% of the outstanding class, with no sole voting or dispositive power and all authority held on a shared basis.

SSGA Funds Management, Inc., an investment adviser within the State Street group, separately reports beneficial ownership of 15,911,611 shares, or 8.2% of the class, also with shared voting and dispositive power only. The firms certify that these securities are held in the ordinary course of business and are not intended to change or influence control of Omnicom.

Insights

Equity ownership & governance analyst

State Street discloses a sizable but passive 13.8% stake in Omnicom.

State Street Corporation reports beneficial ownership of 26,656,167 Omnicom shares, equal to 13.8% of the common stock as of the event date. Its affiliate SSGA Funds Management, Inc. reports 15,911,611 shares, or 8.2%, reflecting holdings managed across multiple global investment adviser subsidiaries.

Both entities show zero sole voting and dispositive power, with all authority reported as shared, which is typical for an asset manager acting for client accounts. They also certify the position is held in the ordinary course of business and not for the purpose of changing or influencing control of Omnicom.

For investors, this indicates Omnicom’s shareholder base includes a significant institutional owner with a passive, diversified asset-management profile, rather than an activist or strategic holder seeking control-related changes.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

OMNICOM GROUP INC

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

681919106

(CUSIP Number)

11/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 681919106

1

Names of Reporting Persons

SSGA FUNDS MANAGEMENT, INC.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MASSACHUSETTS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 15,852,588.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 15,910,595.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

15,911,611.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

8.2 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP No. 681919106

1

Names of Reporting Persons

STATE STREET CORPORATION

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MASSACHUSETTS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 21,217,571.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 26,655,151.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

26,656,167.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

13.8 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: OMNICOM GROUP INC
(b)	Address of issuer's principal executive offices: 437 MADISON AVENUE , NEW YORK, NEW YORK, 10022
Item 2.
(a)	Name of person filing: SSGA FUNDS MANAGEMENT, INC.;STATE STREET CORPORATION;
(b)	Address or principal business office or, if none, residence: ONE CONGRESS STREET, SUITE 1, BOSTON MA 02114, UNITED STATES (FOR ALL REPORTING PERSONS)
(c)	Citizenship: MA
(d)	Title of class of securities: COMMON STOCK
(e)	CUSIP No.: 681919106
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 26656167.00
(b)	Percent of class: 13.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 21,217,571
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 26,655,151
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. NOT APPLICABLE
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. SSGA FUNDS MANAGEMENT, INC. (IA);STATE STREET GLOBAL ADVISORS (JAPAN) CO., LTD. (IA);STATE STREET GLOBAL ADVISORS ASIA LIMITED (IA);STATE STREET GLOBAL ADVISORS EUROPE LIMITED (IA);STATE STREET GLOBAL ADVISORS LIMITED (IA);STATE STREET GLOBAL ADVISORS SINGAPORE LIMITED (IA);STATE STREET GLOBAL ADVISORS TRUST COMPANY (IA);STATE STREET GLOBAL ADVISORS, AUSTRALIA, LIMITED (IA);STATE STREET GLOBAL ADVISORS, LTD. (IA);
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. NOT APPLICABLE
Item 9.	Notice of Dissolution of Group.
	Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5. NOT APPLICABLE

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

SSGA FUNDS MANAGEMENT, INC.

Signature:	BRIAN HARRIS
Name/Title:	CHIEF COMPLIANCE OFFICER
Date:	12/05/2025

STATE STREET CORPORATION

Signature:	ELIZABETH SCHAEFER
Name/Title:	SENIOR VICE PRESIDENT, CHIEF ACCOUNTING OFFICER
Date:	12/05/2025

FAQ

How much of Omnicom Group (OMC) does State Street Corporation own?

State Street Corporation reports beneficial ownership of 26,656,167 shares of Omnicom Group common stock, representing 13.8% of the outstanding class as of the event date.

What stake in Omnicom Group (OMC) is held by SSGA Funds Management, Inc.?

SSGA Funds Management, Inc. reports beneficial ownership of 15,911,611 shares of Omnicom Group common stock, equal to 8.2% of the class.

Is State Street’s ownership in Omnicom considered passive or activist?

The filing certifies that the Omnicom securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the company.

Does State Street have sole or shared voting power over its Omnicom shares?

State Street reports 0 shares with sole voting or dispositive power and only shared power over its Omnicom holdings.

Why did State Street and SSGA file a Schedule 13G for Omnicom Group (OMC)?

They crossed the 5% ownership threshold in Omnicom common stock and, as institutional passive investors, reported their stake on Schedule 13G rather than Schedule 13D.

Which subsidiaries are involved in managing State Street’s Omnicom holdings?

The filing lists multiple State Street Global Advisors entities, including SSGA Funds Management, Inc. and regional SSGA affiliates in Japan, Asia, Europe, the UK, Singapore, and Australia, as investment advisers.