Results of Operations

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 16, 2019 OMNICOM GROUP INC. (Exact Name of Registrant as Specified in its Charter) New York (State or other jurisdiction of incorporation) 1-10551 (Commission File Number) 13-1514814 (IRS Employer Identification No.) 437 Madison Avenue, New York, NY (Address of principal executive offices) 10022 (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 ( see General Instruction A.2. below): ¨ 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)) 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 16, 2019, Omnicom Group Inc. (“Omnicom” or the “Company”) published an earnings release reporting its financial results for the three months ended March 31, 2019. A copy of the earnings release is attached as Exhibit 99.1 hereto and is incorporated by reference herein. Following the publication of the earnings release, Omnicom hosted an earnings call in which its financial results were discussed. The investor presentation materials used for the call are attached as Exhibit 99.2 hereto and are incorporated by reference herein. On April 16, 2019, Omnicom posted the materials attached as Exhibits 99.1 and 99.2 on its web site (www.omnicomgroup.com). Certain statements in the exhibits to this Current Report on Form 8-K constitute forward-looking statements, including statements within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, from time to time, the Company or its representatives have made, or may make, forward-looking statements, orally or in writing. These statements 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 the Company’s management as well as assumptions made by, and information currently available to, the Company’s 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 various risks and uncertainties, many of which are outside the Company’s control. Therefore, you should not place undue reliance on such statements. Factors that could cause actual results to differ materially from those in the forward-looking statements include: international, national or local economic conditions that could adversely affect the Company or its clients; losses on media purchases and production costs incurred on behalf of clients; reductions in client spending, a slowdown in client payments and a deterioration in the credit markets; the ability to attract new clients and retain existing clients in the manner anticipated; changes in client advertising, marketing and corporate communications requirements; failure to manage potential conflicts of interest between or among clients; unanticipated changes relating to competitive factors in the advertising, marketing and corporate communications industries; ability to hire and retain key personnel; currency exchange rate fluctuations; reliance on information technology systems; changes in legislation or governmental regulations affecting the Company or its clients; risks associated with assumptions the Company makes in connection with its critical accounting estimates and legal proceedings; and the Company’s international operations, which are subject to the risks of currency repatriation restrictions, social or political conditions and regulatory environment. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties that may affect the Company’s business, including those described under “Risk Factors” in Omnicom's Annual Report on Form 10-K for the year ended December 31, 2018 and other documents filed from time to time with the Securities and Exchange Commission. Except as required under applicable law, the Company does not assume any obligation to update these forward-looking statements. The foregoing information (including the exhibits 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. Item 9.01. Financial Statements and Exhibits. (d) Exhibits . Exhibit Number Description 99.1 Earnings release dated April 16, 2019. 99.2 Investor presentation materials dated April 16, 2019. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Omnicom Group Inc. By: /s/ Andrew L. Castellaneta Name: Andrew L. Castellaneta Title: Senior Vice President, Chief Accounting Officer Date: April 16, 2019