AT&T, Yum Brands set for after-hours action By: MarketWatch April 22, 2014 at 14:12 PM EDT AT&T, Amgen and Yum Brands are among the stocks likely to see active trading after the market closes with all three on tap to report quarterly results. Read More >> Related Stocks: AT&T Inc Amgen Gilead Sciences Intuitive Surgical Vmware Inc Yum Brands