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Midday movers: Wal-Mart, Blackberry, ADT & more

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

Wal-Mart Stores rose after the discount retailer said company veteran Doug McMillon would replace Mike Duke as CEO.

Blackberry shares fell after the struggling smartphone maker said three top executives, including its CFO, were departing as part of a much-anticipated shakeup that follows the exit by its CEO earlier in the month.

Qualcomm declined after the chip maker said Chinese regulators are probing its pricing practices.

Lions Gate Entertainment fell after its record-opening box office of 'The Hunger Games: Catching Fire' disappointed Wall Street's sky-high expectations.

DaVita HealthCare Partners and Fresenius Medical Care gained after the government axed a a proposed cut in payment rates for dialysis treatments.

Sears Holdings jumped on rumors it was exploring a sale of its Canadian stores, but came off session highs after a spokesperson for the retail chain denied the company's CEO was in talks to sell its interest in Sears Canada.

Cubist Pharmaceuticals gained after it said its experimental treatment for a type of urinary tract infection was as effective as an approved antibiotic.

ADT Corp fell after the home-security specialist said it would buy back more than 10 million shares owned by hedge-fund Corvex Management.

Biogen Idec continued to surged after a committee of the European Medicines Agency granted new active substance designation for its oral multiple sclerosis treatment.

Giant Interactive Group rose after the Chinese online-game developer received an offer to take it private from its chairman and an affiliate of Baring Private Equity Asia for about $2.8 billion, or $11.75 a share.

(Read More: See CNBC's Market Insider Blog)

—By CNBC's Rich Fisherman.

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

  • Patti Domm

    Patti Domm is CNBC Executive Editor, News, responsible for news coverage of the markets and economy.

  • A CNBC reporter since 1990, Bob Pisani covers Wall Street from the floor of the New York Stock Exchange.

  • CNBC's Senior Personal Finance Correspondent

  • JeeYeon Park is a writer for CNBC.com. Follow her on Twitter: @JeeYeonParkCNBC

  • Rick Santelli joined CNBC Business News as an on-air editor in 1999, reporting live from the floor of the Chicago Board of Trade.

  • Senior Producer at CNBC's Breaking News Desk.