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

• Wellington Management Company owns 10.96M shares worth $200.41M
• BVF owns 5.25M shares worth $96.02M
• Vanguard owns 4.27M shares worth $78.04M
• Sectoral Asset Management owns 3.71M shares worth $67.75M
• Waddell & Reed Financial owns 3.63M shares worth $66.38M
• ALLIANCEBERNSTEIN owns 2.67M shares worth $36.77M
• STATE STREET CORPORATION owns 2.24M shares worth $40.97M
• Maverick Capital owns 2.10M shares worth $28.96M
• Ridgeback Capital Investments owns 2.09M shares worth $26.75M
• VHCP Management owns 1.80M shares worth $32.90M
• State of Wisconsin Investment Board owns 1.62M shares worth $29.72M
• Adage Capital Partners GP owns 1.44M shares worth $26.34M
• FMR owns 1.22M shares worth $16.30M
• T. Rowe Price Associates owns 1.22M shares worth $22.36M
• Jennison Associates owns 1.21M shares worth $14.47M
• Bridger Management owns 1.19M shares worth $21.75M
• TCW owns 1.17M shares worth $21.41M
• Oracle Investment Management owns 1.09M shares worth $19.86B
• Allianz Asset Management AG owns 1.04M shares worth $11.48M
• SHAPIRO ROBERT N owns 963515 shares worth $17.00M
• FIL owns 826765 shares worth $15.12M
• Ameriprise Financial owns 677548 shares worth $9.34M
• D. E. Shaw & Co owns 658258 shares worth $9.07M
• Tang Capital Management owns 600000 shares worth $10.97M

• BP (BP)
• Chubb Corporation (CB)
• Compass Minerals International (CMP)
• Diamond Offshore Drilling (DO)
• BioMarin Pharmaceutical (BMRN)
• Regeneron Pharmaceuticals (REGN)
• Amgen (AMGN)
• Biogen Idec (BIIB)
• Array BioPharma (ARRY)
• Onyx Pharmaceuticals (ONXX)
• Medicines Company (MDCO)
• Exelixis (EXEL)
• Pain Therapeutics (PTIE)
• Cytokinetics (CYTK)
• Rigel Pharmaceuticals (RIGL)
• Targacept (TRGT)
• Celldex Therapeutics (CLDX)
• Ironwood Pharmaceuticals (IRWD)
• Myrexis (MYRX)
• AVANIR Pharmaceuticals (AVNR)
• ACADIA Pharmaceuticals (ACAD)