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Check out which companies are making headlines before the bell:

Dunkin' Brands—Following the stock's biggest one-day drop ever Thursday, CLSA upgraded the stock to "outperform" from "underperform". CLSA cites valuation after the big drop, and notes that the doughnut chain has plenty of cash as well as opportunities for growth.

Mondelez—The snacks maker is exploring a sale of several European businesses, according to Reuters. The cheese and grocery businesses in Europe could fetch around $3 billion in a sale.

Micron Technology—The chipmaker reported adjusted quarterly profit of 37 cents per share, 5 cents above estimates, with revenue also beating forecasts. Micron said it expects demand for its memory chips to stabilize in the near term and then improve next year.

Advanced Micro Devices—AMD plans to cut its workforce by 500 jobs, or about 5 percent, and take a restructuring charge of $42 million. The maker of semiconductors expects to save about $58 million next year as a result of the cuts.

Nordstrom—Nordstrom announced a special dividend of $4.85 per share, and the retailer also unveiled a new $1 billion share repurchase program.

T-Mobile US—About 15 million T-Mobile customers are victims of a data breach at credit reporting agency Experian. The breach occurred from September 2013 through last month, and affected customers who applied for T-Mobile device financing or postpaid services. Separately, D.A. Davidson began coverage of the wireless carrier with a "buy" rating, saying its role as industry disruptor continues to help it gain market share.

Barracuda Networks—Barracuda announced a $50 million stock buyback program. The data security company's new program will last through September of 2017.

Sprint—Sprint will cut as much as $2.5 billion in costs over the next six months, according to the Wall Street Journal. The paper quoted an internal memo, which said jobs would be cut and that an external hiring freeze would be put in place.

Novartis—The drug maker received FDA approval for a biosimilar copy of Amgen's best-swelling Enbrel rheumatoid arthritis drug.

Qualcomm—Qualcomm chips will be used in some of Samsung's upcoming Galaxy S7 phones, according to the Electronic Times.

Bank of America—The bank's Merrill Lynch unit must face a class action shareholder suit for the firm's role in the 2014 buyout of jewelry retailer Zale. The suit claims shareholders were short-changed in the deal, which saw Signet Jewelers buy Zale for $21 per share or $690 million.

FedEx—UPS is lobbying to hinder FedEx's proposed acquisition of European delivery service TNT Express, according to a Bloomberg report. European regulators are currently reviewing the deal, nearly three years after regulator concerns led UPS to abandon its own takeover deal for TNT.

Supervalu—Chief Executive Officer Sam Duncan announced plans to retire at the end of February. The supermarket operator's board has begun the process of searching for a successor.

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