Check out which companies are making headlines before the bell Friday:
Ally Financial - The auto lender gained in premarket trading after saying the U.S. Treasury Department would sell its remaining $1.25 billion stake.
American Apparel - The retailer rose after Bloomberg cited a person familiar with the matter in reporting founder Dov Charney was working with a private-equity company on an offer for the company that fired him earlier this week.
BlackBerry - The wireless-device maker fell as it posted a larger-than-expected decline in quarterly revenue.
CarMax - The used-car seller climbed in premarket trading after it reported a 16 percent gain in quarter revenue.
Finish Line - The shoe-store operator dropped after posting fiscal third-quarter results that fell short of expectations.
Nike - The sporting-goods maker slipped as its future orders disappointed investors.
Paychex - The provider of human-resource outsourcing gained after reporting second-quarter results.
Xerox - Shares of the company climbed after French computer-services company Atos agreed to buy Xerox's information-technology outsourcing business for $1.05 billion.
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