Check out which companies are making headlines before the bell on Monday:
Tyson Foods– The beef, pork, and poultry producer earned 70 cents per share for its fourth quarter, beating estimates by one cent, with revenue essentially in line.
Supervalu – Goldman Sachs downgraded the supermarket chain to "sell" from "neutral", citing cuts to the federal food stamp program and encroaching competition.
Microsoft – Bank of America/Merrill Lynch downgraded Microsoft stock to "underperform" from "neutral".
Nvidia – Morgan Stanley downgraded the graphics chip maker's shares to "underweight" from "equalweight", citing growth prospects for some of Nvidia's new offerings.
JinkoSolar Holdings– The maker of solar equipment reported quarterly profit of $1.44 per share, swamping estimates of $0.45. Revenue was also above consensus, and the company raised its order forecast for the fourth quarter and full year.
Vitamin Shoppe – The health products retailer's shares were added to the "conviction buy" list at Goldman Sachs, citing the industry's recent track record for growth and momentum.
Merck – The drug maker is ending production at one of its Puerto Rico plants by late 2014 as part of a global restructuring. It will consolidate operations with another plant in Puerto Rico.
Boeing – Boeing received over 250 orders for its revamped 777 jet at the Dubai Airshow. Separately, the aerospace giant said it had no plans to reopen talks with its machinists union, after a contract proposal that would have located 777X jet production in the Seattle area was rejected.
Dish Network – The paid television producer and its chairman, Charles Ergen, have been sued by bankrupt wireless firm LightSquared. Dish is accused of trying to illegally take control of LightSquared's wireless spectrum.
Apple – The iPhone maker may or may not have bought Israel's PrimeSense, the company behind the technology involved in Microsoft's Xbox Kinect. Financial newspaper Calcalist said the deal had been completed for $345 million, but another report in Business Insider said no deal has taken place.
UnitedHealth – The health insurer is said to have dropped thousands of doctors from its networks in recent weeks, according to a report in the Wall Street Journal.
Medtronic – Medtronic is the subject of an FDA warning, with the agency saying defects in certain medical devices made by the company could cause harm or even death. The concerns center on guidewires that are used in heart-related procedures.
Sony – The electronics giant sold more than one million of its new PlayStation 4 gaming consoles on Friday's first day of sales.
—By CNBC's Peter Schacknow
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