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

• Oracle Investment Management owns 8.28M shares worth $16.64B
• Allianz Global Investors of America owns 3.61M shares worth $9.32M
• Visium Asset Management owns 2.00M shares worth $4.02M
• "Perkins Capital Management, Inc." owns 1.90M shares worth $3.94M
• Timberline Asset Management owns 1.55M shares worth $3.12M
• Thomas Weisel Asset Management owns 1.55M shares worth $3.23M
• Vanguard owns 1.27M shares worth $2.54M
• STATE STREET CORPORATION owns 748993 shares worth $1.51M
• Teachers Advisors owns 587701 shares worth $1.76M
• Dr. Jeffrey R. Jay, M.D owns 500000 shares worth $1.50M
• Verition Fund Management owns 411640 shares worth $827396
• Trellus Management Company owns 381251 shares worth $793002
• Geode Capital Management owns 228319 shares worth $458921
• TIAA-CREF Investment Management owns 208555 shares worth $419195
• Bridgeway Capital Management owns 201757 shares worth $419654
• CalPERS owns 153525 shares worth $308585
• Penbrook Managment owns 148625 shares worth $337378
• High Pointe Capital Management owns 144850 shares worth $434550
• Old West Investment Management owns 123698 shares worth $247396
• Zacks Investment Management owns 118836 shares worth $356508
• ING Investment Management Co Address: 10 State House Square owns 114230 shares worth $233029
• Oxford Asset Management owns 110687 shares worth $332061
• Symmetry Peak Management owns 100000 shares worth $194000
• Charles Schwab Investment Management owns 95500 shares worth $191955
• California State Teachers Retirement System owns 95131 shares worth $191213
• AQR Capital Management owns 90200 shares worth $175890
• Royce & Associates owns 87000 shares worth $223590
• Nomura Holdings owns 82500 shares worth $0
• Carl Domino owns 77000 shares worth $154770

• Driehaus Capital Management sold on Sept. 30, 2011
• Eudaimonia Asset Management sold on Sept. 30, 2011
• Jacobs Levy Equity Management sold on Sept. 30, 2011
• ESSEX INVESTMENT MANAGEMENT sold on Sept. 30, 2011
• Millennium Management sold on Sept. 30, 2011
• Royal Bank of Canada sold on Sept. 30, 2011
• UBS AG sold on Sept. 30, 2011
• GOLDMAN SACHS sold on Sept. 30, 2011
• Barclays sold on Sept. 30, 2011
• Technical Financial Services sold on June 30, 2011
• Commerzbank Aktiengesellschaft sold on June 30, 2011
• Renaissance Technologies sold on June 30, 2011
• Jennison Associates sold on June 30, 2011
• Artis Capital Management, L P sold on March 31, 2011
• PEAK6 Investments sold on March 31, 2011
• RCM Capital Management sold on Dec. 31, 2010
• BAM Capital sold on Dec. 31, 2010
• D. E. Shaw & Co sold on Dec. 31, 2010
• Norges Bank Investment Management sold on Sept. 30, 2009
• Tudor Investment Corporation sold on March 31, 2007

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• Tenet Healthcare Corporation (THC)
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• Gentiva Health Services (GTIV)
• Quidel Corporation (QDEL)
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• NxStage Medical (NXTM)
• VIVUS (VVUS)
• Acorda Therapeutics (ACOR)
• GTx (GTXI)
• Dex (DXCM)
• Ladenburg Thalmann Financial Services (LTS)
• Accuray Incorporated (ARAY)
• Hansen Medical (HNSN)
• MAKO Surgical (MAKO)
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• Opko Health (OPK)