Check out the companies making headlines after the bell Thursday:
Alcoa tumbled 5 percent after it missed on the top and bottom lines, with adjusted earnings of 7 cents a share on $5.57 billion in revenue. Analysts had expected the industrial giant to report profit of 13 cents a share on $5.65 billion in revenue.
Gap Inc, which operates Old Navy and Banana Republic stores as well as its namesake brand, said comparable-store sales for the company fell 1 percent in September. The apparel retailer's shares slid 6 percent after hours.
Personal care and household products maker Helen of Troy reported better-than-expected earnings and revenue for the second quarter, sending the company's shares up more about 8 percent in after-hours trading. It also raised the bottom end of its 2016 earnings and revenue guidance.
Restaurant operator Ruby Tuesday posted a surprise fiscal-first-quarter loss of 3 cents a share, versus forecasts for a profit of 5 cents a share. The company met revenue estimates of $279 million and said same-restaurant sales rose 0.6 percent. Share fell more than 5 percent after the bell.
Tribune Media said it was exploring the possible sale of its historic Tribune Tower in Chicago. It has hired Eastdil Secured to "begin exploring strategic monetization alternatives" for the 36-story building and the adjacent land. Tribune share were up about 6 percent after the announcement.