Take a look at some of Wednesday's midday movers:
Facebook - Shares fell ahead of the social network's earnings report later Wednesday and after it won regulatory approval to buy Occulus, a maker of virtual reality goggles.
Gilead Sciences - The biopharmaceutical company gained after posting better-than-expected earnings.
Biogen Idec - The biotechnology company fell after reporting per share earnings that missed estimates.
Amazon.com - Shares of the online retailer declined. It is teaming up with HBO in a deal that will make available to Amazon Prime members some classic cable shows like the Sopranos and The Wire. Netflix fell on the news.
Northrop Grumman - The defense contractor rose after posting better-than-expectedquarterly earnings.
Plug Power - The fuel cell maker declined after saying it would take part in a secondary stock offering, selling an additional 15 million shares.
SunPower - The solar panel maker rose after Deutsche Bank upgraded the stock to buy from hold, increasing its price target to $38 from $33 a share.
Norfolk Southern - The railway fell after its first-quarter profit dropped 18 percent amid weakness in coal shipments.
Brinker International - The operator of casual dining restaurants lost ground as its third-quarter revenues came in shy of expectations.
Dr Pepper Snapple Group - The soft drink company advanced after reporting its first-quarter profit rose 46 percent, helped by strong sales and lower commodity costs.
Coca-Cola - Shares of the beverage maker moved a bit lower ahead of its shareholders' meeting at which the company's compensation plan will be voted on.
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—By CNBC's Rich Fisherman.
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