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

• OrbiMed Advisors owns 6.80M shares worth $32.09M
• PRIMECAP Management Company owns 6.68M shares worth $31.54M
• Levin Capital Strategies owns 5.48M shares worth $25.87M
• Wentworth, Hauser & Violich owns 4.37M shares worth $20.61M
• Consonance Capital owns 3.94M shares worth $18.61M
• First Trust Advisors owns 3.47M shares worth $16.40M
• Vanguard owns 3.23M shares worth $15.26M
• Artal Group S.A. owns 3.00M shares worth $14.16M
• Ulys owns 3.00M shares worth $12.81M
• Neuberger Berman owns 1.79M shares worth $8.43M
• OMT Capital Management owns 1.46M shares worth $6.83M
• STATE STREET CORPORATION owns 1.38M shares worth $6.52M
• NUMERIC INVESTORS owns 1.23M shares worth $5.78M
• Frank Russell Company owns 1.22M shares worth $5.76M
• CR Intrinsic Investors owns 1.15M shares worth $4.70M
• JPMORGAN CHASE & CO owns 981579 shares worth $4.60M
• Diamondback Capital Management owns 810400 shares worth $3.52M
• Jacobs Levy Equity Management owns 792064 shares worth $2.51M
• Inves owns 769636 shares worth $3.34M
• Spark LP/DE owns 762400 shares worth $3.26M
• ESSEX INVESTMENT MANAGEMENT owns 754612 shares worth $0
• Millennium Management owns 704531 shares worth $2.23M
• AQR Capital Management owns 683429 shares worth $2.17M

• BB Biotech AG sold on June 30, 2011
• Technical Financial Services sold on June 30, 2011
• New York State Common Retirement Fund sold on June 30, 2011
• OppenheimerFunds sold on June 30, 2011
• Wells Fargo & Company sold on March 31, 2011
• Artis Capital Management, L P sold on March 31, 2011
• Hambrecht & Quist Capital Management sold on March 31, 2011
• GOLDMAN SACHS sold on March 31, 2011
• Robeco Investment Management sold on March 31, 2011
• Brown Capital Management sold on Dec. 31, 2010
• Royce & Associates sold on Sept. 30, 2010
• Aster Investment Management sold on Sept. 30, 2008

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• BioMarin Pharmaceutical (BMRN)
• XenoPort (XNPT)
• Cardinal Health (CAH)
• Edwards Lifesciences (EW)
• Boston Scientific Corporation (BSX)
• Medtronic (MDT)
• Affymetrix (AFFX)
• Amgen (AMGN)
• Stryker Corporation (SYK)
• UnitedHealth (UNH)
• WellPoint (WLP)
• Biogen Idec (BIIB)
• Zimmer Holdings (ZMH)
• Life Technologies (LIFE)
• Celgene Corporation (CELG)
• Medivation (MDVN)
• Sequenom (SQNM)
• Dendreon Corporation (DNDN)
• OraSure Technologies (OSUR)
• Amarin Corporation (AMRN)