Take a look at some of Wednesday's midday movers:
Aegerion Pharmaceuticals - The drug maker gained after saying it had resolved regulatory concerns related to its cholesterol drug.
Amgen - The biopharmaceutical company rose after the Food and Drug Administration granted priority review for its application for its potential treatment for heart failure.
Analog Devices - The maker of integrated circuits for the semiconductor industry was the largest decliner on the , a day after reporting third-quarter results.
Best Buy Co. - The consumer-electronics retailer was the biggest advancer on the S&P 500, recouping much of the prior session's losses that came after the company reported a second-quarter revenue shortfall.
Brown-Forman - The maker of Jack Daniel's whiskey dropped after reporting weaker-than-expected first-quarter earnings.
Chico's FAS - The clothing chain declined after reporting second-quarter earnings below expectations.
Elizabeth Arden - The maker of beauty products climbed after saying it would review a tender offer by affiliates of Rhône Capital.
Facebook - The social-networking site fell after Janney Montgomery Scott downgraded it to neutral from buy.
Garmin - The maker of navigation devices declined after R.W. Baird initiated coverage with a neutral rating.
Heico - The maker of industrial goods for the aerospace industry declined on weaker-than-expected third-quarter sales.
RadioShack - The struggling electronics retailer jumped after Bloomberg cited two people with knowledge of the matter in reporting the company is in discussions with shareholder Standard General about getting financing to help it avoid a bankruptcy filing.
Rent-A-Center - The supplier of rent-to-own furniture and appliances gained after Canaccord Genuity upgraded its shares to buy from hold.
SeaDrill - The off-shore driller fell after it missed earnings forecasts and called the rig market challenging.
Smith & Wesson Holding - The firearms maker lost ground after lowering its 2014 outlook beneath estimates.
Sturm, Roger & Co. - The gun manufacturer dropped after CRT Capital downgraded it to fair value from buy.
Tetra Tech - The supplier of oilfield services climbed after Cowen hiked its rating to outperform from market perform.
Time Warner Cable - The cable operator edged higher after a major power outage shut down internet services for nearly two hours.
TubeMogul - The provider of marketing software surged a day after reporting second-quarter revenue above expectations.
Waste Management - The supplier of disposal services gained after Stifel Nicolaus upgraded its shares to buy from hold.
Yingli Green Energy Holding Co. - The Chinese solar-panel maker declined after reporting a bigger-than-expected quarterly loss and cutting its 2014 forecast.
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—By CNBC's Rich Fisherman.
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