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Notable Holders of Biogen Idec, Inc. (BIIB)

  |   Expand Research on BIIB   |   * Does Not Fully Represent All Holders
Fund Title Shares % Owned Source
PRIMECAP COM 24,706,226 10.17% 13F
Fidelity Investments COM 17,631,870 7.26% 13F
Clearbridge Advisors, LLC COM 13,302,596 5.48% 13F
JPMORGAN CHASE & CO COMMON 10,196,893 4.20% 13F
VANGUARD GROUP INC COM 9,467,716 3.90% 13F
BlackRock Institutional Trust Company, N.A. COM 6,567,866 2.70% 13F
AMERIPRISE FINANCIAL INC COM 6,143,613 2.53% 13F
MARSICO CAPITAL MANAGEMENT LLC COM 5,890,076 2.42% 13F
PRICE T ROWE ASSOCIATES INC /MD/ COMM STK 5,420,678 2.23% 13F
Wellington COM 4,691,299 1.93% 13F
BLACKROCK ADVISORS LLC COM 3,199,723 1.32% 13F
NORTHERN TRUST CORP COM 2,799,430 1.15% 13F
BlackRock Fund Advisors COM 2,566,214 1.06% 13F
Viking Global Investors COM 2,529,322 1.04% 13F
JANUS CAPITAL MANAGEMENT LLC COM 2,259,420 0.93% 13F
TIAA CREF INVESTMENT MANAGEMENT LLC COM 2,151,891 0.89% 13F
BlackRock Group LTD COM 1,934,695 0.80% 13F
MORGAN STANLEY COM 1,867,121 0.77% 13F
Invesco Ltd. COMMON 1,767,485 0.73% 13F
FRANKLIN RESOURCES INC 1,590,108 0.65% 13F
GEODE CAPITAL MANAGEMENT LLC COM 1,452,248 0.60% 13F
SECTORAL ASSET MANAGEMENT INC COMMON 1,409,603 0.58% 13F
BlackRock Investment Management, LLC COM 1,273,200 0.52% 13F
RAINIER INVESTMENT MANAGEMENT INC/ COM 1,239,340 0.51% 13F
HUSSMAN ECONOMETRICS ADVISORS, INC. COM 1,192,000 0.49% 13F
Goldman Sachs Asset Management, L.P. CMN 1,095,335 0.45% 13F
LEGAL & GENERAL GROUP PLC COM 1,009,389 0.42% 13F
Adage Capital COM 971,324 0.40% 13F
Investec Asset Management LTD COMMON STOCK 890,707 0.37% 13F
BARCLAYS PLC (CALL) OPT 850,900 0.35% 13F
NEW YORK STATE COMMON RETIREMENT FUND COMMON STOCK 831,349 0.34% 13F
DEUTSCHE BANK AG\ COM 824,973 0.34% 13F
BlackRock Inc. COM 811,620 0.33% 13F
CITIGROUP INC (CALL) COM 795,800 0.33% 13F
Sumitomo Mitsui Trust Holdings, Inc. COM 778,727 0.32% 13F
FIL Ltd COM 745,740 0.31% 13F
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC EQTY US OTC 712,711 0.29% 13F
SYSTEMATIC FINANCIAL MANAGEMENT LP 700,379 0.29% 13F
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM * BIOGEN IDEC INC COM 671,166 0.28% 13F
NEW YORK STATE TEACHERS RETIREMENT SYSTEM COM 667,047 0.27% 13F
BANK OF AMERICA CORP /DE/ 662,767 0.27% 13F
PGGM Investments COM 658,632 0.27% 13F
RENAISSANCE TECHNOLOGIES LLC COM 640,361 0.26% 13F
BMO FINANCIAL CORP COM 636,591 0.26% 13F
MANAGED ACCOUNT ADVISORS LLC 589,810 0.24% 13F
BlackRock Japan Co. Ltd COM 552,427 0.23% 13F
CREDIT SUISSE AG/ COM 550,759 0.23% 13F
AQR CAPITAL MANAGEMENT LLC COM 520,455 0.21% 13F
SCHWAB CHARLES INVESTMENT MANAGEMENT INC COM 510,876 0.21% 13F
RUSSELL FRANK CO/ COMMON STOCKS 503,850 0.21% 13F
VIRGINIA RETIREMENT SYSTEMS ET AL COM 494,876 0.20% 13F
ROOSEVELT INVESTMENT GROUP INC COM 486,080 0.20% 13F
Mitsubishi UFJ Trust & Banking Corp COM 478,347 0.20% 13F
ING INVESTMENT MANAGEMENT CO COM 474,233 0.20% 13F
STATE OF WISCONSIN INVESTMENT BOARD COM 469,581 0.19% 13F
PARAMETRIC PORTFOLIO ASSOCIATES Common Stock 415,247 0.17% 13F
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO COM 398,803 0.16% 13F
Mizuho Trust & Banking Co., Ltd. COM 393,193 0.16% 13F
SAC Capital COMMON 387,014 0.16% 13F
Visium Asset Management, LP COMMON STOCK 385,993 0.16% 13F
TEACHERS ADVISORS INC COM 385,314 0.16% 13F
Origin Asset Management LLP COM 328,259 0.14% 13F
MARVIN & PALMER ASSOCIATES INC COM 324,600 0.13% 13F
MADISON SQUARE INVESTORS LLC. COM 317,800 0.13% 13F
ANALYTIC INVESTORS INC/CA 317,298 0.13% 13F
ARGENT CAPITAL MANAGEMENT LLC 305,876 0.13% 13F
CAISSE DE DEPOT ET PLACEMENT DU QUEBEC COMMON 291,878 0.12% 13F
GUGGENHEIM CAPITAL LLC COM 286,918 0.12% 13F
Timber Hill LLC (PUT) PUT 267,200 0.11% 13F
TWO SIGMA INVESTMENTS LLC COM 264,573 0.11% 13F
PRINCIPAL FINANCIAL GROUP INC COM 262,017 0.11% 13F
WELLS FARGO & CO/MN CMNSTOCK 242,345 0.10% 13F
DIMENSIONAL FUND ADVISORS LP COM 239,389 0.10% 13F
Manulife Asset Management (North America) Ltd COM 232,529 0.10% 13F
Partner Fund Management, L.P. COM 230,846 0.10% 13F
Alyeska Investment Group, L.P. COM 225,347 0.09% 13F
Spot Trading L.L.C (CALL) COM 202,300 0.08% 13F
KINGDON CAPITAL MANAGEMENT LLC COM 200,200 0.08% 13F
LOS ANGELES CAPITAL MANAGEMENT & EQUITY RESEARCH INC COM 192,323 0.08% 13F
TD ASSET MANAGEMENT INC COM 191,097 0.08% 13F
CAXTON ASSOCIATES LP COM 189,750 0.08% 13F
OrbiMed Advisors COM 189,300 0.08% 13F
ARROWSTREET CAPITAL LIMITED PARTNERSHIP COM 185,825 0.08% 13F
UNITED SERVICES AUTOMOBILE ASSOCIATION COMMON 184,682 0.08% 13F
Euclid Advisors LLC COM 183,000 0.08% 13F
TIRSCHWELL & LOEWY INC COM 180,979 0.07% 13F
SEI TRUST CO 180,190 0.07% 13F
FIRST QUADRANT L P/CA COM 177,600 0.07% 13F
Citadel CMN 177,159 0.07% 13F
GREAT WEST LIFE ASSURANCE CO /CAN/ COM 170,709 0.07% 13F
Grantham, Mayo, Van Otterloo & Co. LLC COM 170,610 0.07% 13F
Antipodean Advisors LLC COM 159,000 0.07% 13F
ROYAL BANK OF CANADA \ COM 148,568 0.06% 13F
UBS AG COM 146,715 0.06% 13F
OZ MANAGEMENT LP (PUT) COM 138,200 0.06% 13F
MCKINLEY CAPITAL MANAGEMENT LLC /DELAWARE COM 137,043 0.06% 13F
Hambrecht & Quist Capital Management LLC COMMON 133,154 0.05% 13F
IBM Retirement Fund 09062X103 127,675 0.05% 13F
MILLENNIUM MANAGEMENT LLC COM 126,476 0.05% 13F
COMERICA BANK COM 124,026 0.05% 13F
KBC Group NV COM 123,275 0.05% 13F
Employees Retirement System of Texas COM 121,800 0.05% 13F
HSBC HOLDINGS PLC 114,729 0.05% 13F
MANUFACTURERES LIFE INSURANCE CO COM 109,453 0.05% 13F
Numeric Investors LLC COMM 108,870 0.04% 13F
STATE TREASURER STATE OF MICHIGAN COM 108,849 0.04% 13F
AMERICAN INTERNATIONAL GROUP INC COM 106,355 0.04% 13F
CREDIT AGRICOLE S A COM 104,249 0.04% 13F
SAMLYN CAPITAL, LLC COM 98,000 0.04% 13F
JEFFERIES GROUP INC /DE/ (CALL) COM 97,600 0.04% 13F
Irish Life Investment Managers COM 96,769 0.04% 13F
OMERS ADMINISTRATION CORP COM 93,650 0.04% 13F
GABELLI FUNDS LLC COM 93,500 0.04% 13F
BAM Capital, LLC COM 93,000 0.04% 13F
PUBLIC SECTOR PENSION INVESTMENT BOARD COMMON 89,406 0.04% 13F
Partner Investment Management, L.P. COM 89,209 0.04% 13F
HealthCor Management, L.P. COMMON STOCK 87,326 0.04% 13F
ZWEIG ADVISERS LLC 84,000 0.03% 13F
SHELL ASSET MANAGEMENT CO COM 83,812 0.03% 13F
ARONSON & JOHNSON & ORTIZ, LP COM 83,200 0.03% 13F
DIAMONDBACK CAPITAL MANAGEMENT, LLC COM 82,460 0.03% 13F
KNIGHT CAPITAL GROUP, INC. (PUT) PUT 79,500 0.03% 13F
HighVista Strategies LLC COM 78,234 0.03% 13F
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 76,319 0.03% 13F
SCHRODER INVESTMENT MANAGEMENT GROUP COM 75,987 0.03% 13F
Lingohr & Partner North America. Inc. CS 75,279 0.03% 13F
Lingohr & Partner Asset Management GmbH CS 75,279 0.03% 13F
Highbridge Capital COMMON 73,528 0.03% 13F
WOLVERINE ASSET MANAGEMENT LLC COM 69,982 0.03% 13F
RAYMOND JAMES & ASSOCIATES COM 69,095 0.03% 13F
LEUTHOLD WEEDEN CAPITAL MANAGEMENT COM 67,344 0.03% 13F
PUTNAM FL INVESTMENT MANAGEMENT CO COM 65,312 0.03% 13F
BRAUN STACEY ASSOCIATES INC COMMON 63,991 0.03% 13F
ING Investment Management (Europe) B.V. COM 63,458 0.03% 13F
APG All Pensions Group NV COM 58,993 0.02% 13F
MACQUARIE GROUP LTD COMMON STOCK 57,340 0.02% 13F
Robeco Institutional Asset Management B.V. COM 57,023 0.02% 13F
BNP Paribas Investment Partners S.A. COM 56,645 0.02% 13F
SG Americas Securities, LLC 55,602 0.02% 13F
THRIVENT FINANCIAL FOR LUTHERANS COM 55,130 0.02% 13F
Parallax Volatility Advisers, LLC (PUT) COM 55,100 0.02% 13F
OAK ASSOCIATES LTD /OH/ COM 53,600 0.02% 13F
UNIONBANCAL CORP COM 53,180 0.02% 13F
Korea Investment CORP COM 52,700 0.02% 13F
GLENMEDE TRUST CO NA COMMON 51,750 0.02% 13F
Boston Advisors COM 50,083 0.02% 13F
Dynamic Capital Management Ltd COM 49,209 0.02% 13F
ING GROEP NV COM 48,380 0.02% 13F
DAI ICHI LIFE INSURANCE CO., LTD. COM 48,100 0.02% 13F
DIAM Co., Ltd. COM 47,594 0.02% 13F
World Asset Management Inc COM 47,358 0.02% 13F
F&C Asset Management plc USD0.0005 47,180 0.02% 13F
MASON STREET ADVISORS LLC COM 46,955 0.02% 13F
CIBC Global Asset Management Inc COM 45,884 0.02% 13F
GOLDEN CAPITAL MANAGEMENT LLC 45,450 0.02% 13F
NOMURA ASSET MANAGEMENT CO LTD 45,252 0.02% 13F
FIRST INVESTORS MANAGEMENT CO INC CSD 42,100 0.02% 13F
ROYAL LONDON ASSET MANAGEMENT LTD COM 41,269 0.02% 13F
PEAK6 Investments, L.P. COM 41,100 0.02% 13F
TWO SIGMA ADVISERS, LLC COM 38,200 0.02% 13F
IG INVESTMENT MANAGEMENT LTD COM 36,623 0.02% 13F
Artisan Partners Limited Partnership COM 36,303 0.01% 13F
Winton Capital Management Ltd COM 35,800 0.01% 13F
HANCOCK HOLDING CO COM 34,868 0.01% 13F
RCM CAPITAL MANAGEMENT LLC COM 34,750 0.01% 13F
D. E. Shaw & Co., INC. COM 34,301 0.01% 13F
Gargoyle Services L.L.C. COM 31,947 0.01% 13F
JD CAPITAL MANAGEMENT LLC (CALL) COM 31,700 0.01% 13F
Weiss Multi-Strategy Advisers LLC (PUT) COM 31,300 0.01% 13F
Counsel Portfolio Services Inc. BIOGEN IDEC INC 30,776 0.01% 13F
TRAXIS PARTNERS LP COM 30,300 0.01% 13F
EULAV ASSET MANAGEMENT, LLC COM 30,000 0.01% 13F
Decatur Capital Management, Inc. COM 29,600 0.01% 13F
Walleye Trading LLC (CALL) COM 29,600 0.01% 13F
PARADIGM ASSET MANAGEMENT CO LLC COM 27,900 0.01% 13F
Aperio Group, LLC COMMON 26,818 0.01% 13F
COMMONWEALTH BANK OF AUSTRALIA COM 26,496 0.01% 13F
ALLSTATE CORP COMMON 26,060 0.01% 13F
Nottinghill Investment Advisers, Ltd. COM 26,011 0.01% 13F
Horizon Kinetics LLC 25,560 0.01% 13F
TWIN CAPITAL MANAGEMENT INC COM 25,450 0.01% 13F
GW CAPITAL MANAGEMENT LLC COMMON STOCK 24,613 0.01% 13F