** Shares of advertising group Omnicom OMC.N up ~13% at $79.40 after co reports upbeat quarterly results
** OMC stock on track for biggest daily percentage gain since February 2022
** Co, late on Wednesday, posted Q4 revenue of $5.53 billion, topping analysts' average estimate of $5.04 billion - data compiled by LSEG
** The results are the first after OMC closed its $13.25 billion acquisition of rival Interpublic Group
** Average rating of 13 analysts covering OMC is "buy"; their median PT is $95, down from $103 a month ago
** OMC is down ~2.2% YTD vs. the Nasdaq Composite Index's .IXIC 2.4% decline
(Reporting by Chibuike Oguh in New York)
((Email: Chibuike.Oguh@thomsonreuters.com; Phone: +332-219-1834; Reuters Messaging: chibuike.oguh.thomsonreuters.com@reuters.net))