Take a look at some of Monday's midday movers:
Advanced Micro Devices - The maker of processors for personal computers jumped after posting first-quarter profit above expectations.
Athenahealth - The medical-software company fell after reporting first-quarter profit below estimates.
Cbeyond - Shares of the provider of technology and communications equipment surged after news that Birch Communications would buy Cbeyond for about $323 million.
Facebook - The social-networking company climbed after Goldman Sachs reiterated its "buy" recommendation.
Halliburton - The fracking-service provider gained after tallying first-quarter earnings that beat estimates.
Home Depot - The home-improvement retailer rose after Barron's reported its shares could climb to $95 as the weather gets better and the housing market improves.
Monster Beverage - The maker of energy drinks slipped after reaching an accord to settle a class-action lawsuit against it and two of its officers.
Newmont Mining - Shares of the gold producer advanced after Bloomberg cited two people familiar with the matter in reporting merger talks between it and Barrick Gold could be revived. Shares of Barrick Gold fell.
Pfizer - The pharmaceutical giant gained after Britain's Sunday Times cited senior investment bankers and industry sources in reporting Pfizer had approached British competitor AstraZeneca about a $101 billion takeover.
Sarepta Therapeutics - Shares rallied after the company said it would filing for marketing approval of its drug to treat Duchenne muscular dystrophy by the end of the year.
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—By CNBC's Kate Gibson.
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