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omc-20260428

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): April 28, 2026

OMNICOM GROUP INC.

(Exact Name of Registrant as Specified in its Charter)

New York

1-10551

13-1514814

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

280 Park Avenue, New York, NY 10017

(Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code: (212) 415-3600

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered

Common Stock, par value $0.15 per shareOMCNew York Stock Exchange

0.800% Senior Notes due 2027OMC/27New York Stock Exchange

1.400% Senior Notes due 2031OMC/31New York Stock Exchange

3.700% Senior Notes due 2032OMC/32New York Stock Exchange

2.250% Senior Notes due 2033OMC/33New York Stock Exchange

3.850% Senior Notes due 2034OMC/34New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On April 28, 2026, Omnicom Group Inc. ("Omnicom," the "Company," "we," "our" or "us") published an earnings release reporting its financial results for the three months ended March 31, 2026. A copy of the earnings release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein in its entirety.

Item 7.01. Regulation FD Disclosure.

On April 28, 2026, Omnicom hosted an earnings call and posted on its website a related investor presentation in connection with publishing its financial results for the three months ended March 31, 2026. A copy of the presentation is furnished as Exhibit 99.2 to this report and is incorporated by reference herein in its entirety.

The information under Items 2.02 and 7.01 above (including Exhibits 99.1 and 99.2 hereto) is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward-Looking Statements.

Certain statements in the exhibits to this Current Report on Form 8-K contain forward-looking statements, including statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. In addition, from time to time, we or our representatives have made, or may make, forward-looking statements, orally or in writing. These statements, other than statements of historical fact, may discuss goals, intentions and expectations as to future plans, trends, events, results of operations or financial condition, or otherwise, based on current beliefs of our management as well as assumptions made by, and information currently available to, our management. Forward-looking statements may be accompanied by words such as “aim,” “anticipate,” “believe,” “plan,” “could,” “should,” “would,” “estimate,” “expect,” “forecast,” “future,” “guidance,” “intend,” “may,” “will,” “possible,” “potential,” “predict,” “project” or similar words, phrases or expressions. These forward-looking statements are subject to v

omc-202602180000029989false00000299892026-02-182026-02-180000029989omc:CommonStock0.15ParValueMember2026-02-182026-02-180000029989omc:A0.800SeniorNotesDue2027Member2026-02-182026-02-180000029989omc:A1.400SeniorNotesDue2031Member2026-02-182026-02-180000029989omc:A3.700SeniorNotesDue2032Member2026-02-182026-02-180000029989omc:A2.250SeniorNotesDue2033Member2026-02-182026-02-18

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): February 18, 2026

OMNICOM GROUP INC.

(Exact Name of Registrant as Specified in its Charter)

New York 1-10551 13-1514814

(State or other jurisdiction of incorporation) (Commission File Number) (IRS Employer Identification No.)

280 Park Avenue, New York, NY 10017 (Address of principal executive offices)(Zip Code)

Registrant’s telephone number, including area code: (212) 415-3600 Not Applicable (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, par value $0.15 per shareOMCNew York Stock Exchange 0.800% Senior Notes due 2027OMC/27New York Stock Exchange 1.400% Senior Notes due 2031OMC/31New York Stock Exchange 3.700% Senior Notes due 2032OMC/32New York Stock Exchange 2.250% Senior Notes due 2033OMC/33New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition. On February 18, 2026, Omnicom Group Inc. ("Omnicom," the "Company," "we," "our" or "us") published an earnings release reporting its financial results for the three months and year ended December 31, 2025. A copy of the earnings release is furnished as Exhibit 99.1 to this report and is incorporated by reference herein in its entirety.

Item 7.01. Regulation FD Disclosure. On February 18, 2026, Omnicom hosted an earnings call and posted on its website a related investor presentation in connection with publishing its financial results for the three months and year ended December 31, 2025. A copy of the presentation is furnished as Exhibit 99.2 to this report and is incorporated by reference herein in its entirety. On February 18, 2026, Omnicom issued a press release announcing that its Board of Directors approved a $5.0 billion share repurchase program and Omnicom entered into $2.5 billion of accelerated share repurchase arrangements. A copy of the press release is furnished as Exhibit 99.3 to this report and is incorporated by reference herein in its entirety. The information under Items 2.02 and 7.01 above (including Exhibits 99.1, 99.2 and 99.3 hereto) is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward-Looking Statements.

Certain statements in the exhibits to this Current Report on Form 8-K contains forward-looking statements, including statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. In addition, from time to time, we or our representatives have made, or may make, forward-looking statements, orally or in writing. These statements, other than statements of historical fact, may discuss goals, intentions and expectations as to future plans, trends, events, results of operations or financial condition, or otherwise, based on current beliefs of our management as well as assumptions made by, and information currently available to, our management. Forward-looking statements may be accompanied by words such as “aim,” “anticipate,” “believe,” “plan,” “could,”