Royal Caribbean - The cruise line operator more than doubles its quarterly dividend to 25 cents per share from 12 cents. It's also named former Ernst & Young CEO William Kimsey as its first lead director.
Pandora - The online radio site has named former Microsoft executive Brian McAndrews as its new chief executive officer. He will replace Joe Kennedy, who had announced in March that he would be leaving the company.
Qualcomm - The chipmaker has announced a new $5 billion stock buyback program, replacing an earlier $5 billion program that had been announced in March. Qualcomm had already purchased more than half the stock authorized under the previous program.
Mead Johnson Nutrition - Mead Johnson said its board approved a $500 million share repurchase plan. The nutrition products company still has about $9.7 million in authorizations remaining from a prior repurchase plan.
Men's Wearhouse - The men's clothier cut its full year earnings guidance, as retail clothing sales fall below the company's initial forecasts. The company reported profit of $1.01 per share for its most recent quarter, below estimates of $1.14, with revenue also below analyst forecasts.
Vertex Pharmaceuticals, Ametek - The two will join the S&P 500 after the close of trading on September 20. They will replace Advanced Micro Devices and SAIC, which will take the place of Vertex and Ametek in the S&P MidCap 400.
Sterling Financial - Sterling is being bought by fellow regional bank Umpqua Holdings for $2 billion in cash and stock.
SiriusXM Radio - The satellite radio company is being sued by record companies Capitol Records, Sony Music, Universal Music, and Warner Music, which claim Sirius is not paying royalties for recordings from prior to 1972.
Wal-Mart - The retailer has announced "aggressive" pricing for Apple's (AAPL) newest iPhones. It's selling the iPhone 5S for $189, $10 less than Apple's stated price, and the iPhone 5C for $79 compared to the Apple list price of $99.
Zynga - Evecore Partners has upgraded the online game provider's stock to "equal weight" from "underweight", based on increasing user engagement and potential for a continuation of that trend.
Symantec - The anti virus software provider's shares were cut to "equalweight" from "overweight" at Morgan Stanley.
—By CNBC's Peter Schacknow
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