ALEXION PHARMACEUTICALS INC filings

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SEC filings by ALEXION PHARMACEUTICALS INC (ownership)
TypeFiledFilerSubjectShares OwnedPercent Owned
SC 13G/A2015-02-09BlackRock Inc.ALEXION PHARMACEUTICALS INC13,455,3136.8%EDGAR
SC 13G/A2014-12-10PRICE T ROWE ASSOCIATES INC /MD/ALEXION PHARMACEUTICALS INC19,846,69010.0%EDGAR
SC 13G/A2014-02-14FMR LLCALEXION PHARMACEUTICALS INC19,709,43710.1%EDGAR
SC 13G/A2014-02-13Capital Research Global InvestorsALEXION PHARMACEUTICALS INC23,703,11212.1%EDGAR
SC 13G/A2014-02-07PRICE T ROWE ASSOCIATES INC /MD/ALEXION PHARMACEUTICALS INC14,887,3087.5%EDGAR
SC 13G/A2014-02-07PRUDENTIAL FINANCIAL INCALEXION PHARMACEUTICALS INC--EDGAR
SC 13G/A2014-02-07WESTFIELD CAPITAL MANAGEMENT CO LPALEXION PHARMACEUTICALS INC00.0%EDGAR
SC 13G/A2014-02-06JENNISON ASSOCIATES LLCALEXION PHARMACEUTICALS INC8,397,8894.3%EDGAR
SC 13G/A2014-01-28BlackRock Inc.ALEXION PHARMACEUTICALS INC12,157,6036.2%EDGAR
SC 13G/A2013-03-08Capital Research Global InvestorsALEXION PHARMACEUTICALS INC21,006,84610.8%EDGAR
SC 13G/A2013-02-14FMR LLCALEXION PHARMACEUTICALS INC14,952,5097.7%EDGAR
SC 13G2013-02-13PRUDENTIAL FINANCIAL INCALEXION PHARMACEUTICALS INC10,417,0955.4%EDGAR
SC 13G/A2013-02-12Capital Research Global InvestorsALEXION PHARMACEUTICALS INC18,462,6009.5%EDGAR
SC 13G2013-02-11JENNISON ASSOCIATES LLCALEXION PHARMACEUTICALS INC10,056,6865.2%EDGAR
SC 13G/A2013-02-08PRICE T ROWE ASSOCIATES INC /MD/ALEXION PHARMACEUTICALS INC18,500,3749.5%EDGAR
SC 13G/A2013-02-06BlackRock Inc.ALEXION PHARMACEUTICALS INC13,308,7716.8%EDGAR
SC 13G/A2012-02-14FMR LLCALEXION PHARMACEUTICALS INC21,273,52511.5%EDGAR
SC 13G/A2012-02-14Capital Research Global InvestorsALEXION PHARMACEUTICALS INC13,328,1227.2%EDGAR
SC 13G/A2012-02-13PRICE T ROWE ASSOCIATES INC /MD/ALEXION PHARMACEUTICALS INC14,488,3957.8%EDGAR
SC 13G/A2012-02-13Invus Public Equities, LPALEXION PHARMACEUTICALS INC1,500,0004.0%EDGAR
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