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

• T. Rowe Price Associates owns 5.74M shares worth $191.68M
• Wellington Management Company owns 5.24M shares worth $175.03M
• Royce & Associates owns 3.51M shares worth $117.46M
• Vanguard owns 3.50M shares worth $117.10M
• S.A.C. Capital Advisors owns 2.34M shares worth $78.06M
• D. E. Shaw & Co owns 2.07M shares worth $49.66M
• PointState Capital owns 1.60M shares worth $53.46M
• Soros Fund Management owns 1.60M shares worth $29.82M
• STATE STREET CORPORATION owns 1.59M shares worth $53.04M
• Inves owns 1.26M shares worth $42.06M
• Daiwa Securities owns 1.13M shares worth $25.93M
• Deerfield Management Company owns 1.08M shares worth $25.82M
• HealthCor Management owns 1.07M shares worth $35.92M
• Ridgeback Capital Investments owns 1.05M shares worth $27.11M
• Jennison Associates owns 1.04M shares worth $34.61M
• OppenheimerFunds owns 1.01M shares worth $33.85M
• BB Biotech AG owns 987654 shares worth $33.00M
• CITADEL ADVISORS owns 977258 shares worth $25.22M
• Renaissance Technologies owns 870632 shares worth $19.97M
• Gail Mannix owns 747129 shares worth $24.96M
• Hussman Econometrics Advisors owns 696000 shares worth $23.26M
• Thrivent Financial for Lutherans owns 694700 shares worth $23.21M
• Perella Weinberg Partners Capital Management owns 660335 shares worth $22.07M
• Consonance Capital owns 641498 shares worth $21.43M
• Redmile owns 610300 shares worth $12.25M
• GOLDMAN SACHS owns 587103 shares worth $19.62M
• Barclays owns 586600 shares worth $19.60M
• ING Investment Management Co Address: 10 State House Square owns 567405 shares worth $18.93M
• AQR Capital Management owns 565570 shares worth $12.97M
• Highline Capital Management owns 547000 shares worth $10.20M
• Private Capital Advisors owns 540950 shares worth $10.08M
• Heather K. Mellem, Esq. owns 482117 shares worth $11.06M
• Principal Financial owns 480943 shares worth $16.06M

• J. Goldman & Co sold on Sept. 30, 2011
• Jacobs Levy Equity Management sold on June 30, 2011
• Golden Capital Management sold on March 31, 2011
• Bridgeway Capital Management sold on March 31, 2011
• Columbia Wanger Asset Management sold on June 30, 2010
• Tudor Investment Corporation sold on Sept. 30, 2006
• Roxbury Capital Management sold on June 30, 2005
• Navellier & Associates sold on Sept. 30, 2003
• Manufacturers Life Insurance Company sold on Dec. 31, 2002

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