Check out which companies are making headlines after the bell Tuesday:
Alcoa - The aluminum producer posted earnings of 11 cents a share, excluding one-time items, on sales of $5.77 billion, easily topping expectations for 5 cents a share on sales of $5.63 billion. The company affirmed its 2013 global aluminum demand growth forecast of 7 percent. Shares gained in extended-hours trading.
Yum Brands - The parent company of KFC and Pizza Hut posted earnings of 85 cents a share, excluding one-time items, on revenue of $3.47 billion, missing expectations for 93 cents a share on sales of $3.53 billion. In addition, the company said it expects full-year earnings declining at a high-single digit to a low double-digit rate. Shares tumbled in extended-hours trading. Rivals McDonald's and Wendy's also traded lower.
Apple - The tech giant plans to unveil some new products at its next invitation-only event on October 22, according to a report from AllThingsD, citing people familiar with Apple's plans. Apple shares edged higher in extended-hours trading.