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 Dow Down0.52% Nasdaq Down1.11%

Biogen Idec Inc. (BIIB)

-NasdaqGS

233.07 May 22, 4:00PM EDT

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Major HoldersGet Major Holders for:
Breakdown
% of Shares Held by All Insider and 5% Owners:0%
% of Shares Held by Institutional & Mutual Fund Owners:94%
% of Float Held by Institutional & Mutual Fund Owners:94%
Number of Institutions Holding Shares:640

Major Direct Holders (Forms 3 & 4)
HolderSharesReported
SCANGOS GEORGE A50,509Apr 30, 2013
YOUNG WILLIAM30,899Jun 7, 2012
PANGIA ROBERT W18,598Feb 5, 2013
COX JOHN18,060May 2, 2013
ALEXANDER SUSAN H15,135Feb 22, 2013


Top Institutional Holders
HolderShares% OutValue*Reported
FMR, LLC22,628,6269.534,358,725,940Mar 31, 2013
Primecap Management Company19,207,5538.093,699,758,858Mar 31, 2013
JP Morgan Chase & Company11,060,1354.662,130,403,203Mar 31, 2013
Vanguard Group, Inc. (The)10,619,9924.472,045,622,859Mar 31, 2013
State Street Corporation10,601,8394.472,042,126,228Mar 31, 2013
Capital Research Global Investors9,993,1004.211,924,870,922Mar 31, 2013
Price (T.Rowe) Associates Inc9,527,5424.011,835,195,140Mar 31, 2013
ClearBridge Investments, LLC9,367,8453.951,804,434,303Mar 31, 2013
Jennison Associates LLC6,824,2462.871,314,486,264Mar 31, 2013
BlackRock Institutional Trust Company, N.A.6,614,9702.791,274,175,521Mar 31, 2013

Top Mutual Fund Holders
HolderShares% OutValue*Reported
Vanguard/Primecap Fund11,964,1005.041,751,185,317Dec 31, 2012
Fidelity Contrafund Inc8,689,6653.661,673,803,272Mar 31, 2013
Growth Fund Of America Inc4,687,0001.97902,809,940Mar 31, 2013
Legg Mason Clearbridge Aggressive Growth Fd3,848,0421.62741,209,850Mar 31, 2013
Vanguard Horizon Fund-Capital Opportunity Portfolio3,074,7001.30450,043,839Dec 31, 2012
Amcap Fund3,051,4001.29587,760,668Mar 31, 2013
Vanguard Total Stock Market Index Fund3,003,5841.27439,634,590Dec 31, 2012
Powershares Exhg Traded Fd Tr-Powershares QQQ Tr, Series 12,293,1730.97441,710,983Mar 31, 2013
Mainstay Large Cap Growth Fund2,283,0000.96379,754,220Feb 28, 2013
SPDR S&P 500 ETF Trust2,207,7150.93425,250,063Mar 31, 2013

View Transactions for Insiders & Institutional Holders

Value shown is computed using the security's price on the report date given.

Currency in USD.