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

• Vanguard owns 2.65M shares worth $3.71M
• OrbiMed Advisors owns 2.58M shares worth $48.94M
• OppenheimerFunds owns 2.30M shares worth $43.70M
• Visium Asset Management owns 2.08M shares worth $39.40M
• HealthCor Management owns 1.50M shares worth $10.30M
• Gilder, Gagnon, Howe & Co owns 1.16M shares worth $1.60M
• Sectoral Asset Management owns 1.13M shares worth $21.55M
• T. Rowe Price Associates owns 1.11M shares worth $21.05M
• AQR Capital Management owns 1.09M shares worth $1.51M
• Renaissance Technologies owns 1.03M shares worth $1.41M
• Technical Financial Services owns 719087 shares worth $992340
• TAMRO Capital Partners owns 708300 shares worth $13.45M
• Ascend Capital owns 703294 shares worth $3.15M
• STATE STREET CORPORATION owns 674163 shares worth $937086
• QS Investors owns 637900 shares worth $16.38M
• D. E. Shaw & Co owns 606546 shares worth $11.52M
• Tang Capital Management owns 525990 shares worth $720606
• Wellington Management Company owns 505072 shares worth $9.60M
• Manatuck Hill Partners owns 500000 shares worth $6.44M
• Loeb Arbitrage Management owns 455000 shares worth $3.01M
• Jacobs Levy Equity Management owns 452550 shares worth $8.59M
• Independence Capital Asset Partners owns 400000 shares worth $2.35M
• Millennium Management owns 383172 shares worth $528777
• GOLDMAN SACHS owns 356621 shares worth $6.77M
• Dr. Jeffrey R. Jay, M.D owns 354700 shares worth $2.34M
• Barclays owns 352700 shares worth $7.43M
• Hambrecht & Quist Capital Management owns 352127 shares worth $2.33M
• Polar Capital owns 315000 shares worth $6.63M
• AH Lisanti Capital Growth owns 305675 shares worth $3.94M
• AXA owns 302292 shares worth $1.35M
• Bailard owns 302000 shares worth $1.35M
• Heather K. Mellem, Esq. owns 288450 shares worth $5.48M
• AXA owns 288401 shares worth $5.48M
• Weintraub Capital Management owns 285000 shares worth $6.00M
• Inves owns 282820 shares worth $3.64M
• TIAA-CREF Investment Management owns 275547 shares worth $3.23M
• 1798 Global Partners owns 269884 shares worth $3.17M
• Deer VI & Co owns 269586 shares worth $5.68M
• Campbell & Co. Investment Adviser owns 257450 shares worth $4.89M
• State of Wisconsin Investment Board owns 250000 shares worth $1.65M

• HealthCor Management sold on Sept. 30, 2011
• VHCP Management sold on Sept. 30, 2011
• BVF sold on Sept. 30, 2011
• BBT Capital Management sold on Sept. 30, 2011
• RA Capital Management sold on June 30, 2011
• Redmile sold on June 30, 2011
• Credit Suisse AG sold on March 31, 2011
• Norges Bank Investment Management sold on March 31, 2011
• Independence Capital Asset Partners sold on March 31, 2011
• CITADEL ADVISORS sold on Dec. 31, 2010
• Peninsula Capital Advisors sold on Dec. 31, 2010
• Lone Pine Capital sold on June 30, 2007

• Abbott Laboratories (ABT)
• Baxter International (BAX)
• Incyte Corporation (INCY)
• Pfizer (PFE)
• Regeneron Pharmaceuticals (REGN)
• Vertex Pharmaceuticals Incorporated (VRTX)
• Bristol Myers Squibb (BMY)
• Edwards Lifesciences (EW)
• Medtronic (MDT)
• DaVita (DVA)
• Aetna (AET)
• Allergan (AGN)
• Amgen (AMGN)
• Merck & Co (MRK)
• UnitedHealth (UNH)
• WellPoint (WLP)
• Gilead Sciences (GILD)
• Zimmer Holdings (ZMH)
• Illumina (ILMN)
• Affymax (AFFY)
• Humana (HUM)