Take a look at some of Thursday's midday movers:
American Airlines Group - The carrier gained on better-than-expected first-quarter earnings.
Apple - Shares of the consumer technology giant rallied after it sold more iPhones than analysts had forecast.
Celgene - The biopharmaceutical company declined after it reported quarterly revenue below forecasts.
Diamond Offshore Drilling - The offshore rig contractor rose after posting better-than-expected first-quarter profit.
Elizabeth Arden - The cosmetics company spiked on a Reuters report it hired Goldman Sachs to explore a sale.
Freeport-McMoRan Copper & Gold - The miner rose as its first-quarter profit decline wasn't as bad as feared.
JetBlue Airways - The carrier declined after reporting lower quarterly profit that fell short of street forecasts.
Johnson & Johnson - The health care company moved off its lows after announcing it would raise its quarterly dividend by 6.1 percent to 70 cents a share.
Lorillard - The cigarette seller fell after its first-quarter earnings sank 17 percent.
O'Reilly Automotive - The automotive supplier fell after guiding second-quarter and full-year forecasts below forecasts.
Sotheby's - The auction house rose after Institutional Shareholder Services advised shareholders to vote for two of three board candidates proposed by activist investor Dan Loeb.
Southwest Airlines - The carrier gained after its first-quarter earnings more than doubled.
Stanley Black & Decker - The industrial tool maker gained after posting better-than-expected first-quarter earnings.
Under Armour - The maker of athletic wear fell despite strong first-quarter earnings as it warned that growth in 2014 might not be as strong as last year.
Zimmer Holdings - The orthopedic-device maker rallied after it said it would acquire rival Biomet for more than $13 billion.
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—By CNBC's Rich Fisherman.
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