NEW YORK, April 11, 2013 /PRNewswire/ -- Omnicom Group Inc. (NYSE: OMC) will publish its first quarter 2013 results on Thursday, April 18, 2013. The company will host a conference call to review first quarter results on Thursday, April 18, at 8:30 AM (EDT). The dial-in numbers for the conference call are (877) 260-8900 (domestic) and (612) 332-7516 (international). In addition, the conference call will be simulcast and archived on the Internet at http://www.omnicomgroup.com/FinancialWebcasts. Omnicom ( www.omnicomgroup.com) is a leading global marketing and corporate communications company. Omnicom's branded networks and numerous specialty firms provide advertising, strategic media planning and buying, digital and interactive marketing, direct and promotional marketing, public relations and other specialty communications services to over 5,000 clients in more than 100 countries. SOURCE Omnicom Group Inc.