Omnicom, Sprint rise; ConAgra, Rackspace fall By: MarketWatch February 11, 2014 at 08:35 AM EST Shares of Omnicom Group Inc. and Sprint Corp. rise in premarket trade Tuesday while shares of ConAgra Foods Inc. and Rackspace Hosting Inc. decline. Read More >> Related Stocks: CVS Health Corp ConAgra Foods Omnicom Group Sentinelone Inc Cl A Standard & Poors 500