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Biogen
BIIB

Overview Fund Activity

968 hedge funds and large institutions have $58.9B invested in Biogen in 2015 Q4 according to their latest regulatory filings, with 139 funds opening new positions, 330 increasing their positions, 372 reducing their positions, and 82 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
968
Holders Change
+46
Holders Change %
+4.99%
% of All Funds
25.42%
Holding in Top 10
37
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.97%
New
139
Increased
330
Reduced
372
Closed
82
Calls
$1.24B
Puts
$1.63B
Net Calls
-$397M
Net Calls Change
+$181M

Top Buyers

1
D.E. Shaw & Co
D.E. Shaw & Co
New York
$641M
2
JSP
Jackson Square Partners
California
$874M
3
Westfield Capital Management
Westfield Capital Management
Massachusetts
$157M
4
Millennium Management
Millennium Management
New York
$322M
5
Viking Global Investors
Viking Global Investors
Connecticut
$113M

Top Sellers

1
Fidelity Investments
Fidelity Investments
Massachusetts
$3.96B
2
JHIU
Janus Henderson Investors US
Colorado
$302M
3
SCM
Steadfast Capital Management
New York
$53.3M
4
Sands Capital Management
Sands Capital Management
Virginia
$1.03B
5
Jennison Associates
Jennison Associates
New York
$1.04B
Name Holding Trade Value Shares
Change 		Shares
Change %
CAM
976
Congress Asset Management
Massachusetts
– -$40.4M -138,295 Closed
AI
977
Axiom Investors
Connecticut
– -$30.2M -103,352 Closed
RIG
978
Roosevelt Investment Group
New York
– -$24.2M -82,760 Closed
SM
979
Sabby Management
Florida
– -$22.9M -78,629 Closed
Capital Fund Management (CFM)
980
Capital Fund Management (CFM)
France
– -$16.8M -57,636 Closed
PP
981
PDT Partners
New York
– -$16.8M -57,546 Closed
CCM
982
Cadian Capital Management
New York
– -$14.6M -50,000 Closed
RIM
983
Rainier Investment Management
Washington
– -$12.7M -43,400 Closed
TIM
984
Thornburg Investment Management
New Mexico
– -$11.5M -39,500 Closed
ASC
985
Atalanta Sosnoff Capital
New York
– -$11.3M -38,835 Closed
Renaissance Technologies
986
Renaissance Technologies
New York
– -$10.2M -34,961 Closed
GP
987
GLG Partners
United Kingdom
– -$8.79M -30,127 Closed
IIM
988
Ivory Investment Management
New York
– -$7.92M -27,126 Closed
RSCM
989
Rail-Splitter Capital Management
Illinois
– -$6.95M -23,825 Closed
CM
990
Castleark Management
Illinois
– -$6.71M -23,005 Closed
AL
991
Airain Ltd
Guernsey
– -$6.42M -21,987 Closed
GCM
992
Graham Capital Management
Connecticut
– -$6.15M -21,071 Closed
Jacobs Levy Equity Management
993
Jacobs Levy Equity Management
New Jersey
– -$5.69M -19,504 Closed
Simplex Trading
994
Simplex Trading
Illinois
– -$4.74M -16,253 Closed
FP
995
Foundry Partners
Minnesota
– -$4.52M -15,502 Closed
SFP
996
Santa Fe Partners
New Mexico
– -$3.85M -13,183 Closed
ID
997
Integral Derivatives
New York
– -$3.53M -12,110 Closed
LCM
998
Logan Capital Management
Pennsylvania
– -$3.5M -11,977 Closed
PC
999
Passport Capital
California
– -$3.08M -10,551 Closed
ZCI
1000
Zevenbergen Capital Investments
Washington
– -$2.31M -7,904 Closed
38 39
40
41 42