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

• Third Security owns 14.94M shares worth $27.34M
• Essex Woodlands Health Ventures owns 2.76M shares worth $14.21M
• Vanguard owns 2.68M shares worth $4.90M
• STATE STREET CORPORATION owns 2.29M shares worth $4.20M
• MSDC Management owns 1.15M shares worth $2.10M
• Barclays owns 1.03M shares worth $1.89M
• Ayer Capital Management owns 809009 shares worth $4.41M
• Austin W. Marxe and David M. Greenhouse owns 776741 shares worth $3.23M
• S.A.C. Capital Advisors owns 750000 shares worth $1.37M
• Perceptive Advisors owns 500000 shares worth $2.08M
• Dr. Jeffrey R. Jay, M.D. owns 402500 shares worth $736575
• Dr. Jeffrey R. Jay, M.D owns 402500 shares worth $736575
• Janney Montgomery Scott owns 397800 shares worth $727974
• Wells Fargo & Company owns 368496 shares worth $2.19M
• Driehaus Capital Management owns 347408 shares worth $1.89M
• Geode Capital Management owns 326931 shares worth $598283
• Hayman Capital Management owns 316987 shares worth $580086
• TIAA-CREF Investment Management owns 309623 shares worth $566610
• Visium Asset Management owns 286850 shares worth $524935
• Oxford Asset Management owns 279724 shares worth $1.66M
• Baker Bros. Advisors owns 254199 shares worth $465184
• RA Capital Management owns 220700 shares worth $403881
• Millennium Management owns 208200 shares worth $381006
• First Eagle Investment Management owns 200000 shares worth $366000
• QVT Financial owns 176669 shares worth $962846
• UBS AG owns 168475 shares worth $308309
• Charles Schwab Investment Management owns 163325 shares worth $287452
• Renaissance Technologies owns 151228 shares worth $629108
• J. Goldman & Co owns 150000 shares worth $274500
• Jefferies owns 135820 shares worth $247192
• GOLDMAN SACHS owns 122475 shares worth $510720
• FIL owns 119400 shares worth $496704
• FMR owns 119400 shares worth $636402
• California State Teachers Retirement System owns 115379 shares worth $211143
• ALLIANCEBERNSTEIN owns 112600 shares worth $206058

• Johnson Investment Counsel sold on June 30, 2011
• First Trust Advisors sold on March 31, 2011
• Sunrise Partners Limited Partnership sold on Dec. 31, 2010
• Redmile sold on Dec. 31, 2010
• Diamondback Capital Management sold on March 31, 2009

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