After-hours buzz: Mattress Firm, El Pollo Loco & more By: CNBC.com News November 30, 2015 at 17:17 PM EST Check out the companies making headlines after the bell Monday: Mattress Firm, El Pollo Loco & more. Read More >> Related Stocks: AT&T Inc Alcoa American Airlines Gp Chemours Company El Pollo Loco Rio Tinto Plc ADR South32 Ltd South32 Ltd Wingstop Inc