Take a look at some of Thursday's midday movers:
AT&T - The wireless carrier fell after reporting weaker-than-expected quarterly revenue.
Caterpillar - The Dow component and maker of earth-moving equipment dropped after adjusting its full-year sales outlook lower.
Facebook - The social network jumped after trouncing analysts' expectations for quarterly profit and revenue.
Precision Castparts - The supplier of metal components fell after reporting quarterly earnings below expectations.
Qualcomm - The chip manufacturer declined after projecting quarterly profit that could miss estimates.
SodaStream International - Shares were halted after Bloomberg cited people familiar with the matter in reporting the Israeli maker of home-soda machines company was in talks with an investment firm about going private.
Tractor Supply Company - The operator of farm and ranch stores gained after Wedbush reiterated its outperform rating.
TripAdvisor - The provider of travel reviews fell after posting second-quarter earnings short of estimates.
Under Armour - The maker of sports apparel rose after hiking its full-year sales outlook.
—By CNBC's Kate Gibson.
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