Take a look at some of Monday's midday movers:
Alere - The supplier of health services gained after its former CEO said in a regulatory filing that he was working to take it private.
Ann - The women's retailer declined as two hedge funds continued their campaign to get the parent of Ann Taylor to sell itself.
Apple - The consumer-technology company rose after it reported record first-day pre-orders for its new phones.
Avanir Pharmaceuticals - The drug developer surged after reporting positive results on its drug to treat agitation in Alzheimer's patients.
CVS Health - The drugstore operator climbed after Cowen & Co. upgraded its shares to outperform from market perform.
Darden Restaurants - The restaurant chain climbed after CLSA upgraded the stock to outperform from underperform.
Gilead Sciences - The drug maker fell after agreeing to license a generic version of its hepatitis C drug.
MDU Resources Group - The natural-resource company declined after cutting its 2014 earnings guidance.
Microsoft - The software giant fell after saying it would pay $2.5 billion for video-game developer Mojang.
Netflix - The supplier of streaming video dropped as it began a push into Europe.
NPS Pharmaceuticals - The drug maker fell sharply after its hormone-replacement therapy drew a weak endorsement from an FDA advisory panel.
RadioShack - The electronic retailer jumped as it appointed an interim CFO.
Symantec - The provider of online security declined after RBC Capital downgraded the stock to sector perform from outperform.
Terex - The maker of construction equipment slid after cutting its full-year outlook.
Tesla Motors - The electric-car manufacturer fell after Morgan Stanley researchers said they did not expect the stock to appreciate so consistently in the future.
TRW Automotive Holdings - The auto-parts maker lost group after German automotive transmission maker said it would buy it for $11.74 billion.
Winnebago Industries - The maker of recreational vehicles rose after BMO Capital Markets started coverage with an outperform rating.
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—By CNBC's Rich Fisherman.Questions? Comments? Email us at marketinsider@cnbc.com