State Street Group (OMC) reports 27.77M shares; 9.7% beneficial stake

Rhea-AI Filing Summary

GROUP INC reports that SSGA Funds Management, Inc. and State Street Corporation together beneficially own 27,770,464 shares of Common Stock, representing 9.7% of the class as of 03/31/2026. The filing shows shared voting power of 22,420,320 shares and shared dispositive power of 27,760,218 shares held by the reporting persons.

The Schedule 13G names multiple State Street advisory entities as reporting persons and is signed by senior officers on 05/12/2026. The filing states that holdings are reported on behalf of collective investment accounts and notes the investment-adviser classifications for several subsidiaries.

Key Figures

Beneficial ownership: 27,770,464 shares Percent of class: 9.7% Shared voting power: 22,420,320 shares +3 more

6 metrics

Beneficial ownership 27,770,464 shares Amount beneficially owned as reported

Percent of class 9.7% Percent of class as reported

Shared voting power 22,420,320 shares Shared power to vote reported

Shared dispositive power 27,760,218 shares Shared power to dispose reported

Reporting date 03/31/2026 Date tied to the ownership report

Signature date 05/12/2026 Date signatures certifying the filing were provided

Key Terms

Schedule 13G, Shared Dispositive Power, Beneficially Owned, Investment Adviser (IA) classification

4 terms

Schedule 13G regulatory

"Item 1. (a) Name of issuer: GROUP INC"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

Shared Dispositive Power regulatory

"Item 4. (c)(iv) Shared power to dispose or to direct the disposition of: 27,760,218"

Beneficially Owned financial

"Item 4. (a) Amount beneficially owned: 27770464.00"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Investment Adviser (IA) classification regulatory

"SSGA FUNDS MANAGEMENT, INC. (IA);STATE STREET GLOBAL ADVISORS EUROPE LIMITED (IA)"

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)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 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 22,420,320.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 27,760,218.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

27,770,464.00

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)

9.7 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 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 16,623,822.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 16,679,573.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

16,680,589.00

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)

5.9 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: OMNICOM GROUP INC
(b)	Address of issuer's principal executive offices: 280 PARK AVE, NEW YORK, NEW YORK, 10017
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 Number(s): 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: 27770464.00
(b)	Percent of class: 9.7 %
(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: 22,420,320
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 27,760,218
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.

STATE STREET CORPORATION

Signature:	ELIZABETH SCHAEFER
Name/Title:	SENIOR VICE PRESIDENT, CHIEF ACCOUNTING OFFICER
Date:	05/12/2026

SSGA FUNDS MANAGEMENT, INC.

Signature:	BRIAN HARRIS
Name/Title:	CHIEF COMPLIANCE OFFICER
Date:	05/12/2026

FAQ

What stake does SSGA/State Street report in OMC?

They report beneficial ownership of 27,770,464 shares (9.7%). The Schedule 13G shows this figure as the combined position held by SSGA Funds Management and State Street, reported as of 03/31/2026.

What voting and dispositive powers are reported by State Street?

Shared voting power of 22,420,320 and shared dispositive power of 27,760,218. The filing distinguishes shared powers and reports no sole voting or dispositive power for the reporting persons.

Are these holdings held on behalf of other accounts or entities?

Yes — the filing lists multiple advisory subsidiaries and collective accounts. It identifies State Street advisory entities and notes the holdings are on behalf of investment company or client accounts under advisory classifications.

When was the Schedule 13G signed and by whom?

The form is signed on 05/12/2026 by Elizabeth Schaefer (Senior Vice President, Chief Accounting Officer) and Brian Harris (Chief Compliance Officer), certifying the reported information.