Is XNPT a good stock to own? Find out who bought XenoPort, who sold XenoPort (XNPT) stock, and who holds a large position in XenoPort.

• T. Rowe Price Associates owns 6.08M shares worth $43.49M
• Wellington Management Company owns 5.02M shares worth $35.91M
• OrbiMed Advisors owns 3.96M shares worth $28.34M
• Deerfield Management Company owns 3.01M shares worth $21.53M
• Luxor Capital owns 1.70M shares worth $7.65M
• Vanguard owns 1.46M shares worth $10.41M
• Baker Bros. Advisors owns 1.03M shares worth $7.39M
• D. E. Shaw & Co owns 953352 shares worth $6.82M
• Jennison Associates owns 817844 shares worth $5.85M
• STATE STREET CORPORATION owns 763622 shares worth $5.46M
• CR Intrinsic Investors owns 745000 shares worth $5.33M
• Diamondback Capital Management owns 706700 shares worth $8.09M
• Samlyn Capital owns 700000 shares worth $4.23M
• AQR Capital Management owns 583208 shares worth $4.17M
• Adage Capital Partners GP owns 569600 shares worth $6.52M
• CITADEL ADVISORS owns 483403 shares worth $3.46M
• Bailard owns 420000 shares worth $2.54M
• Driehaus Capital Management owns 401495 shares worth $4.60M
• Oxford Asset Management owns 377526 shares worth $2.28M
• Mazama Capital Management owns 339056 shares worth $1.29M
• Renaissance Technologies owns 318300 shares worth $2.28M
• Jacobs Levy Equity Management owns 296651 shares worth $2.12M
• GOLDMAN SACHS owns 287441 shares worth $2.23M
• Altrinsic Global Advisors owns 286645 shares worth $2.05M
• Spark LP/DE owns 267800 shares worth $1.02M

• Norges Bank Investment Management sold on March 31, 2012
• Green Arrow Capital Management sold on Sept. 30, 2011
• Perella Weinberg Partners Capital Management sold on Sept. 30, 2011
• Millennium Management sold on Sept. 30, 2011
• Principal Financial sold on June 30, 2011
• Sectoral Asset Management sold on March 31, 2011
• BAM Capital sold on March 31, 2011
• Barclays sold on March 31, 2011
• Jefferies sold on March 31, 2011
• Hambrecht & Quist Capital Management sold on March 31, 2011
• Royce & Associates sold on March 31, 2011
• Balyasny Asset Management sold on March 31, 2011
• Gruss Asset Management sold on March 31, 2011
• Franklin Resources sold on March 31, 2011
• QVT Financial sold on Dec. 31, 2010
• HealthCor Management sold on Dec. 31, 2010
• Redmile sold on Dec. 31, 2010
• FMR sold on Dec. 31, 2010
• Credit Suisse AG sold on Dec. 31, 2010
• Columbia Wanger Asset Management sold on June 30, 2010
• Maverick Capital sold on Dec. 31, 2009
• S.A.C. Capital Advisors sold on Sept. 30, 2009

• BP (BP)
• Chubb Corporation (CB)
• Compass Minerals International (CMP)
• Diamond Offshore Drilling (DO)
• PHH Corporation (PHH)
• Packaging Corporation of America (PKG)
• Huntington Bancshares Incorporated (HBAN)
• Hasbro (HAS)
• Cognizant Technology Solutions (CTSH)
• Comcast Corporation (CMCSA)
• Companhia de Bebidas das Americas (ABV)
• Crown Holdings (CCK)
• EXCO Resources (XCO)
• Time Warner Cable (TWC)
• Banco Santander (BSBR)
• Lear Corporation (LEA)
• Petroleo Brasileiro SA (PBR)
• Vale (VALE)
• Sociedad Quimica y Minera (SQM)
• Time Warner (TWX)
• Colfax Corporation (CFX)