After-hours buzz: Amgen, Yahoo, Chipotle & more By: CNBC.com News April 21, 2015 at 17:13 PM EDT Check out the companies making headlines after the bell Tuesday: Amgen, Yahoo, Chipotle & more. Read More >> Related Stocks: Amgen Broadcom Corp Chipotle Mexican Grill Discover Financial Services Intuitive Surgical Stryker Corp Vmware Inc Yahoo Yum Brands