Check out which companies are making headlines after the bell Thursday:

Dell - The computer hardware company reported earnings excluding one-time items of 39 cents a share on revenue of $13.72, missing expectations for 40 cents a share on sales of $13.90 billion. In addition, the company handed in full-year 2012 earnings guidance that missed forecasts. Shares fell in extended-hours trading. (Click here for after-hours quote.)