Zynga - The shares are under pressure following the announcement of a change in Zynga's relationship with Facebook. The new agreement essentially removes the special status that Zynga enjoyed among Facebook game developers, and also now allows Facebook to develop its own games.
Supervalu - The company issued a statement saying it continues to review strategic alternatives and is still in active discussion with several parties. The supermarket operator's stock fell during Thursday's session on reports that talks with private-equity firm Cerberus had stalled. Supervalu does say there is no assurance any deal will result from the current talks.
ConAgra - The food producer's shares have been upgraded to "buy" from "hold" at Jefferies & Co., which says the pending RalCorp acquisition is a "game changer."
Apple - The iPhone 5 has been approved for release in China by regulators, clearing the way for the phone to debut in December. China is Apple's second largest market.
Hanesbrands - Hanesbrands has raised its 2013 earnings outlook, saying it now expects to earn $3.25 to $3.40 per share, up from its earlier estimate of the low $3 range. The apparel maker says its interest expenses will be reduced as a result of early debt payments.
Splunk - The company reported a quarterly loss of $0.01 per share, excluding certain items, a smaller loss than the $0.02 that analysts had expected. The data analysis software provider also raised its revenue guidance for the year, as its customer base grows at a rapid clip.
Zumiez - Zumiez reported quarterly earnings of $0.40 per share, nine cents below estimates. The sports apparel retailer also missed expectations with its revenues, and gave a current quarter outlook below Street estimates. Zumiez says super storm Sandy impacted early November sales, but added that recent trends have been more positive.
National Beverage - The beverage maker will pay a $2.55 per share special dividend to shareholders of record as of Dec. 7. The company had announced its intention to pay a special dividend last week, but did not specify the amount until now.
Yum Brands - Yum predicts same-store fourth-quarter sales in China will be down 4 percent, disappointing investors who had been expecting a better payoff from Yum's rapid expansion in that country. The operator of Pizza Hut, KFC, and Taco Bell also backed a full-year forecast of $3.24 per share, below Street estimates of $3.28.
Tellabs - Tellabs has named acting CEO Daniel Kelly as permanent chief executive. The networking equipment maker also declared a $1 per share special dividend.
Duke Energy - CEO Jim Rogers will retire by the end of next year, ending a controversy surrounding Duke's takeover of Progress Energy. Rogers had been ousted by the board shortly after the deal was completed on July 2, after promising to keep him for 18 months.
Enzon Pharmaceuticals - Enzon has declared a special dividend of $2 per share, payable on Dec. 21 to shareholders of record as of Dec. 10.
St. Jude Medical - The medical device maker has authorized a $1 billion share repurchase program.
Teva Pharmaceutical - Teva is predicting fiscal 2013 earnings per share of $4.85 to $5.15 per share, below Street estimates of $5.63 a share.
—By CNBC's Peter Schacknow
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