Midday Movers: Blackberry, Corning, Windstream & More

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

AK Steel Holding - The steelmaker gained after reporting losses narrowed in the second quarter.

Arch Coal - The miner rose after posting a smaller-than-estimated quarterly loss.

Avery Dennison - The supplier of pressure-sensitive materials fell after Topeka Capital downgraded its stock to hold from buy.

Blackberry - The maker of wireless devices fell after agreeing to buy Secusmart GmbH, a German provider of anti-eavesdropping technology.

Caterpillar - The maker of earth-moving equipment gained after saying it would repurchase $2.5 billion of its shares.

Chesapeake Energy - The natural-gas producer climbed on its plan to buy back $1.26 billion of preferred shares.

Corning - The glass maker declined after reporting second-quarter core earnings beneath expectations.

Costco Wholesale - The operator of membership warehouses rose after Goldman Sachs added it to its conviction buy list.

Honda Motor Co. - The car manufacturer advanced after posting better-than-expected earnings.

Level 3 Communications - The communications provider rose after reporting better-than-expected earnings.

The New York Times - The publisher fell after reporting a mild decline in second-quarter revenue.

Oshkosh - The maker of military and emergency vehicles dropped after cutting its full-year outlook.

Pharmacyclics - The drug developer rose for a second day after the FDA expanded approved uses of its treatment for leukemia. Leering upgraded the stock to outperform from market perform.

Reynolds American - The cigarette maker rose after tallying a rise in quarterly profit.

Spirit Airlines - The low-cost carrier edged lower after reporting second-quarter results.

TRW Automotive Holdings - The supplier of auto systems held steady after tallying better-than-expected second-quarter results.

Windstream Holdings - Shares surged after the company filed to spin off assets into a publicly traded real estate investment trust. Telecom rivals including CenturyLink, Frontier Communications, EarthLink Holdings, AT&T and Verizon Communications.

Wynn Resorts - The casino operator advanced after posting second-quarter earnings that beat forecasts. MGM Resorts, Las Vegas Sands and Melco Crown Entertainment followed suit.

(See CNBC's Market Insider Blog)

—By CNBC's Rich Fisherman.

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