Intuitive Surgical rose after guiding fourth-quarter and fiscal-year 2013 revenues above consensus views.
Control4 surged on the heels of Google buying Nest Labs for $3.2 billion. Control4 provides automation and control solutions for the home.
Intercept Pharmaceuticals continued to fall after its CEO told Bloomberg News the company may need a bigger drug developer to help bring its experimental liver-disease treatment to market.
Jabil Circuit gained after Goldman upgraded its stock to conviction buy from neutral.
Stratasys moved lower after the maker of industrial 3D printers forecast full-year profit below street estimates due to a steep rise in operating costs.
Intel rose after JPMorgan upgraded the chip maker to overweight from neutral.
Delphi Automotive gained ground after it raised its quarterly dividend 47 percent to $0.25 a share and announced a new $1 billion share repurchase program.
Dana Holding moved higher after the supplier of auto parts reported 2013 sales above street estimates.
Family Dollar Stores fell after Barclay's downgraded the stock to underweight from equal weight.
VeriFone Systems rose after JPMorgan upgraded the stock to overweight from neutral.
United States Steel moved higher after BMO Capital upgraded the stock to outperform from market perform.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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