Midday movers: AOL, Cerner, Ralph Lauren & More

Traders work on the floor of the New York Stock Exchange in New York.
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Traders work on the floor of the New York Stock Exchange in New York.

Take a look at some of Wednesday's midday movers:

Alpha Natural Resources - The coal producer advanced after reporting a smaller-than-expected second-quarter loss.

AOL - The provider of online media gained after reporting second-quarter revenue that beat estimates.

Apollo Global Management - The private-equity company fell after posting weaker-than-expected second-quarter earnings.

Bank of America - The bank climbed after hiking its dividend for the first time in seven years.

Cerner - The provider of heath-care IT services rose after Wells Fargo upgraded the stock to outperform on news it's buying Siemens' hospital-IT business for $1.3 billion.

Cognizant Technology Solutions - The provider of IT services dropped after projecting slower growth.

Dish Network - The satellite-TV company rose after losing fewer-than-expected pay-TV subscribers in its second quarter.

HollyFrontier - The refiner gained after posting better-than-expected quarterly earnings.

Jazz Pharmaceuticals - The drug developer climbed after reporting better-than-expected quarterly earnings and raising its revenue guidance.

Mondelez International - The maker of Cadbury chocolate and Oreo cookies declined after trimming its sales target.

Molson Coors Brewing - The beer maker climbed after posting better-than-expected second-quarter results.

Nu Skin Enterprises - The direct seller of skin and nutritional products dropped after reporting a 73 percent decline in quarterly profit.

Ralph Lauren - The clothing brand edged higher after reporting first-quarter results.

Tim Hortons - The Canadian coffee chain rose after reporting a 9.3 percent rise in quarterly revenue.

Visteon - The auto-parts maker gained after reporting an 11 percent rise in quarterly revenue.

(See CNBC's Market Insider Blog)

—By CNBC's Rich Fisherman.

Questions? Comments? Email us at marketinsider@cnbc.com