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Midday movers: Exxon Mobil, LSI, Twitter & more

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

Exxon Mobil - Shares of the oil producer jumped nearly 3 percent after Goldman Sachs Group upgraded its rating of the stock to buy from neutral.

LSI - Shares of the semiconductor manufacturer rose after Avago Technologies said it would purchase LSI in a deal worth $6.6 billion.

Monster Beverage - The distributor of carbonated-energy drinks climbed after RBC Capital Markets upgraded its shares to top pick from outperform.

American International Group - The insurer's shares gained in the wake of its agreement to sell its plane-leasing business to AerCap Holdings.

Cirrus Logic - Shares of the audio-chip supplier fell after Oppenheimer downgraded its stock to underperform from market perform.

Twitter - Shares of the social-networking site declined after Wells Fargo downgraded its stock to underperform from outperform. SunTrust Robinson cut Twitter to hold from buy.

Advanced Micro Devices - Shares of the semiconductor slid after Oppenheimer downgraded its stock to underperform from perform.

Universal Display - The provider of organic light-emitting diode technology jumped after JMP Securities reiterated its buy rating on its shares and hike its price target to $50 from $45.

Tiffany - Shares of the high-end jewelry seller rose after Canaccord Genuity upgraded its shares to hold from sell and upped its price target to $83 from $65.

Starwood Hotels & Resorts Worldwide - Shares of the resort operator rose after Nomura upgraded its stock to buy from neutral and raised its price target to $89 from $76.

Revolution Lighting Technologies - The maker of light-emitting-diode replacement lamps and fixtures rallied on news it had been awarded a U.S. Navy contract to supply LED lighting technology.

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

—By CNBC's Kate Gibson.

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 Senior Commodities Correspondent and 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.