Midday movers: Cummins, Dollar Tree, Zillow & More

Adam Jeffery | CNBC

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

Alexion Pharmaceuticals - The biopharmaceutical company fell after reporting second-quarter results.

Cummins - The engine maker declined after the midpoint of its full-year revenue guidance missed consensus estimates.

D.R. Horton - The home builder and competitors including Lennar and PulteGroup fell after data showed an unexpected drop in pending home sales in June.

Family Dollar Stores - Shares of the discount retailer surged after competitor Dollar Tree said it would buy the company for $8.5 billion.

First Solar - The solar-panel manufacturer rose after releasing a statement saying it had reached a deal to supply 100 megawatts of modules a year to XSOL for projects in Japan.

Tyson Foods - The meat processor gained after saying it would sell its Mexican and Brazilian poultry businesses for $575 million.

Zillow - The real estate website declined after saying it would acquire rival Trulia for $3.5 billion in stock.

(See CNBC's Market Insider Blog)

—By CNBC's Kate Gibson.

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