Costco Wholesale ($COST@US) fell 2.5 percent in Thursday’s premarket trading after the retail chain’s total comparable sales for March slid 1.1 percent. Levi Strauss ($LEVI@US) fell 4 percent in premarket trading after the apparel company reaffirmed its cautious outlook for the year. FedEx ($FDX@US) rose 1 percent in premarket trading after announcing a restructuring plan to reduce costs. Pinterest ($PINS@US) rose 1.2 percent after Raymond James initiated coverage of the social media platform with an outperform rating.