Notable Holders of Alexion Pharmaceuticals (ALXN)

  |   Expand Research on ALXN   |   * Does Not Fully Represent All Holders
Fund Title Shares % Owned Source
BlackRock Institutional Trust Company, N.A. COM 6,089,611 3.08% 13F
BlackRock Fund Advisors COM 5,510,165 2.79% 13F
TIAA CREF INVESTMENT MANAGEMENT LLC CS 3,328,824 1.68% 13F
BlackRock Investment Management, LLC COM 2,305,045 1.17% 13F
Swedbank COM 2,138,261 1.08% 13F
BlackRock Group LTD COM 1,987,406 1.00% 13F
BLACKROCK ADVISORS LLC COM 1,751,063 0.89% 13F
PICTET ASSET MANAGEMENT LTD COM 1,564,739 0.79% 13F
PIONEER INVESTMENT MANAGEMENT INC COM 1,360,498 0.69% 13F
BB BIOTECH AG COM 1,314,428 0.66% 13F
MANAGED ACCOUNT ADVISORS LLC COM 1,227,510 0.62% 13F
OMNI PARTNERS LLP COM 1,003,383 0.51% 13F
JANUS CAPITAL MANAGEMENT LLC COM 982,224 0.50% 13F
TEACHERS ADVISORS INC CS 732,199 0.37% 13F
Marshall Wace North America, L.P. COMMON STOCK 642,648 0.32% 13F
ING INVESTMENT MANAGEMENT CO COM 462,461 0.23% 13F
Polar Capital LLP COM 350,000 0.18% 13F
MFC GLOBAL INVESTMENT MANAGEMENT (U.S.), LLC COM 324,200 0.16% 13F
BlackRock Japan Co. Ltd COM 299,847 0.15% 13F
EULAV ASSET MANAGEMENT, LLC COM 293,600 0.15% 13F
NORTHERN TRUST CO OF CONNECTICUT COM 279,003 0.14% 13F
SEI TRUST CO COM 200,372 0.10% 13F
Legg Mason Investment Counsel, LLC COM 193,772 0.10% 13F
RUSSELL FRANK CO/ Common Stocks 187,099 0.09% 13F
Delek Group, Ltd. COM 167,933 0.08% 13F
PEAK6 Investments, L.P. (PUT) COM 153,800 0.08% 13F
CORNERSTONE CAPITAL MANAGEMENT INC //MN COM 153,765 0.08% 13F
Index Management Solutions, LLC SPONSORED ADS 145,807 0.07% 13F
UBS AG COM 132,425 0.07% 13F
EverPoint Asset Management, LLC COM 124,000 0.06% 13F
Aperio Group, LLC COM 123,557 0.06% 13F
APEX CAPITAL, LLC COM 120,200 0.06% 13F
LEGG MASON CAPITAL MANAGEMENT INC COM 119,295 0.06% 13F
BATTERYMARCH FINANCIAL MANAGEMENT INC COM 114,150 0.06% 13F
Emerald Acquisition Ltd. Common Stocks 111,421 0.06% 13F
Broadfin Capital COM 83,100 0.04% 13F
NF Trinity Capital (Hong Kong) Ltd COM 82,500 0.04% 13F
SPOT TRADING L.L.C. (PUT) COM 81,600 0.04% 13F
Numeric Investors LLC COM 73,700 0.04% 13F
Fjarde AP-fonden (The Fourth Swedish National Pensionfund) COM 69,502 0.04% 13F
BMO FINANCIAL CORP COM 64,871 0.03% 13F
F&C Asset Management plc COMMON STOCK 64,733 0.03% 13F
FITZGERALD THOMAS H JR /CT/ COM 64,200 0.03% 13F
GLG LLC COM 64,133 0.03% 13F
Manulife Asset Management (North America) Ltd COM 62,633 0.03% 13F
CHARTWELL INVESTMENT PARTNERS/PA COM 59,985 0.03% 13F
ALLIANZ GLOBAL INVESTORS OF AMERICA L P COM 58,990 0.03% 13F
Adamant Biomedical Investments AG COM 57,000 0.03% 13F
MADISON SQUARE INVESTORS LLC. COM 54,244 0.03% 13F
ARROWGRASS CAPITAL PARTNERS (US) LP (PUT) COM 50,000 0.03% 13F
SOCIETE GENERALE (PUT) OPT 49,500 0.03% 13F
Bellevue Asset Management AG COM 49,400 0.02% 13F
ABERDEEN ASSET MANAGEMENT PLC/UK COM 47,713 0.02% 13F
Xact Kapitalforvaltning AB COM 46,750 0.02% 13F
Iguana Healthcare Management, LLC COM 40,000 0.02% 13F
KNIGHT CAPITAL GROUP, INC. (PUT) PUT 38,900 0.02% 13F
STRALEM & CO INC COM 35,225 0.02% 13F
DIAM International Ltd. COM 34,116 0.02% 13F
EXXONMOBIL INVESTMENT MANAGEMENT INC /TX COM 33,937 0.02% 13F
Airain ltd Com 33,629 0.02% 13F
BAIRD ROBERT W & CO INC /WI/ COMMON 33,216 0.02% 13F
CAPITAL MANAGEMENT ASSOCIATES INC COM 31,135 0.02% 13F
Lebenthal Holdings,LLC COM 30,671 0.02% 13F
IG INVESTMENT MANAGEMENT LTD COM 28,000 0.01% 13F
Lebenthal Asset Management, LLC COM 27,468 0.01% 13F
KCG Holdings, Inc. COM 26,640 0.01% 13F
SMITH ASSET MANAGEMENT GROUP LP Common Stock - Long 24,510 0.01% 13F
GLG INC. COM 21,087 0.01% 13F
CAPSTONE ASSET MANAGEMENT CO COM 20,292 0.01% 13F
LMR Master Fund Ltd COM 19,824 0.01% 13F