Take a look at some of Tuesday's midday movers:
Tesla Motors - The electric car maker's shares topped $200 for the first time before pulling back.
TriQuint Semiconductor - The company spiked after Forbes cited two sources in the semiconductor sector as saying TriQuint had hired Goldman Sachs for advice in response to activist pressure from Starboard Value.
ConAgra Foods - Shares fell after the food company lowered its outlook for its fiscal year ending in May. It blamed weaker-than-expected volumes in its consumer foods segment.
Infoblox - The network automation company plummeted after it cut its second-quarter revenue outlook.
KB Home - The home builder dropped after Raymond James also downgraded it to underperform from market perform.
Omnicom Group - The advertising company fell after saying merger costs weighed on fourth-quarter net income.
Zoetis - The animal health sciences provider declined after giving a disappointing outlook for 2014.
Groupon - moved lower after the discounts site said its senior vice president of product management would be leaving next month.
Dean Foods - The dairy processor slid after it warned of a possible first-quarter loss.
Xilinx - The designer of programmable devices rose after declaring an 11.5 percent rise in its quarterly dividend to 29 cents a share.
Mosaic - The fertilizer company rose after it said it will buy back $1 billion of its shares.
Burlington Stores - The off-price apparel retailer gained after Morgan Stanley upgraded its shares to outperform.
Pioneer Natural Resources - The energy developer fell as investors focus on its disappointing estimated cored production growth.
Laredo Petroleum - Shares rose on record year-end reserves.
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—By CNBC's Rich Fisherman.
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