Insiders are generally long-term investors due to restriction in making short-term profits. In contrast, wealth management institutions always have short-term investment. Wall St. Watchdog reveals information regarding the insiders and institutions which recently decreased stock shares of Nielsen Holdings N.V. Common St (NYSE:NLSN).

SEC data indicate that these institutions significantly reduced their stock shares of Nielsen Holdings N.V. Common St in Q3 2011:

• LONE PINE CAPITAL LLC: On 06/30/2011, held 5,963,949 shares, worth $185,836,651. On 09/30/2011, held 0 shares.
• CITADEL ADVISORS LLC: On 06/30/2011, held 3,641,039 shares, worth $113,454,775. On 09/30/2011, held 0 shares.
• ALYESKA INVESTMENT GROUP, L.P.: On 06/30/2011, held 1,608,728 shares, worth $50,127,964. On 09/30/2011, held 0 shares.
• STANDARD PACIFIC CAPITAL LLC/CA: On 06/30/2011, held 419,614 shares, worth $13,075,172. On 09/30/2011, held 0 shares.

About the company: Nielsen Holdings N.V. is a global information and measurement company. The Company offers critical media and marketing information, analytics and industry expertise about what consumers watch (consumer interaction with television, online and mobile) and what consumers buy on a global and local basis.

Competitors to Watch: Arbitron Inc. (NYSE:ARB), COMSCORE, Inc. (NASDAQ:SCOR), WPP PLC (NASDAQ:WPPGY), Forrester Research, Inc. (NASDAQ:FORR), Weborama SA (ALWEB), Ipsos SA (NYSE:IPS), UBM Plc (NYSE:UBM) and Arteria SA (AMEX:ARR).

(Note: Data regarding Nielsen Holdings N.V. Common St’s stock holdings are sourced from whalewisdom.com. All data are assumed to be accurate.)

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