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Check out which companies are making headlines before the bell:

Constellation Brands–The spirits producer earned $1.07 per share for its first quarter, 14 cents above estimates, with revenue also above consensus. The company also raised its full-year outlook on improvement in its beer business.

Vitacost–The online vitamin seller is being bought by supermarket giant Kroger for $280 million or $8 per share.

Rackspace–The cloud services provider is in talks to possibly take itself provide, according to a report by technology blog TechCrunch.

GoPro–The high definition camera maker's stock is indicated lower pre-market, possibly setting itself up for its first negative session since debuting last Thursday.

JPMorgan Chase–CEO Jamie Dimon announced he has "curable" throat cancer, but that his prognosis is excellent and he plans to run the company as normal during his treatment.

Google–The search giant bought music streaming service Songza for an undisclosed amount. Google will integrate Songza into both its Google Play music service as well as YouTube. The news could weigh on shares of Songza rival Pandora.

Facebook —The social network is reportedly being probed by UK regulators over its recent psychological experiment on its users. The Financial Times said the Information Commissioner's Office plans to question Facebook about the controversial experiment.

Microsoft–The company is joining Qualcomm and its AllSeen Alliance in an alliance to establish standards for communication between household devices. The alliance has 50 other members including Panasonic, LG, and Sharp.

Paychex–The payroll processor reported fiscal fourth quarter profit of 40 cents per share, matching estimates, with revenue also in line. The company's shares had run up in the regular session ahead of the earnings report.

A. Schulman–The company reported third quarter profit of 74 cents per share, beating estimates by eight cents, with the plastics supplier also raising its full year forecast on improved demand in key markets.

Bank of America–The stock was upgraded to "buy" at Deutsche Bank, which also increased its price target to $18 per share from $16.50.

By CNBC's Peter Schacknow

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