Check out which companies are making headlines after the bell Thursday:
Apple - The consumer technology titan edged higher in after-hours trading after getting hammered during the regular session as it dealt with glitches in the latest version of its operating system and reports of bending phones.
Diamond Foods - The packaged-food company jumped in after-hours trading after reporting fourth-quarter and fiscal-year 2014 financial results.
General Motors - Standard & Poor's upgraded the auto manufacturer's debt to investment grade from junk. Its shares rose in after-hours trading.