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Biogen
BIIB

Overview Fund Activity

1,098 hedge funds and large institutions have $43.4B invested in Biogen in 2021 Q2 according to their latest regulatory filings, with 134 funds opening new positions, 321 increasing their positions, 467 reducing their positions, and 110 closing their positions.

Holders
1,098
Holders Change
+9
Holders Change %
+0.83%
% of All Funds
19.17%
Holding in Top 10
27
Holding in Top 10 Change
+14
Holding in Top 10 Change %
+107.69%
% of All Funds
0.47%
New
134
Increased
321
Reduced
467
Closed
110
Calls
$1.8B
Puts
$1.91B
Net Calls
-$111M
Net Calls Change
-$185M

Top Buyers

1
JPMorgan Chase & Co
1
JPMorgan Chase & Co
New York
$1.85B
2
Marshall Wace
2
Marshall Wace
United Kingdom
$226M
3
SC
3
Samlyn Capital
New York
$130M
4
Citadel Advisors
4
Citadel Advisors
Florida
$193M
5
HM
5
HealthCor Management
New York
$117M

Top Sellers

1
Renaissance Technologies
1
Renaissance Technologies
New York
$461M
2
Fidelity Investments
2
Fidelity Investments
Massachusetts
$468M
3
LSV Asset Management
3
LSV Asset Management
Illinois
$125M
4
Berkshire Hathaway
4
Berkshire Hathaway
Nebraska
$0
5
AQR Capital Management
5
AQR Capital Management
Connecticut
$178M
Name Market Value Shares Shares
Change 		Shares
Change %
DM
1101
Deerfield Management
New York
– – -310,000 Closed
Jacobs Levy Equity Management
1102
Jacobs Levy Equity Management
New Jersey
– – -170,620 Closed
RG
1103
Redmile Group
California
– – -162,847 Closed
TAM
1104
Todd Asset Management
Kentucky
– – -69,793 Closed
Jennison Associates
1105
Jennison Associates
New York
– – -65,838 Closed
Simplex Trading
1106
Simplex Trading
Illinois
– – -43,137 Closed
SM
1107
SG3 Management
Puerto Rico
– – -31,330 Closed
Group One Trading
1108
Group One Trading
Illinois
– – -26,125 Closed
PI
1109
PGGM Investments
Netherlands
– – -22,570 Closed
CIM
1110
Contrarius Investment Management
Jersey
– – -17,224 Closed
AIM
1111
Aigen Investment Management
New York
– – -15,291 Closed
SAM
1112
Stansberry Asset Management
Texas
– – -12,663 Closed
EF
1113
Empowered Funds
Pennsylvania
– – -11,138 Closed
CA
1114
Capitolis Advisors
New York
– – -9,291 Closed
APF
1115
Alaska Permanent Fund
Alaska
– – -8,200 Closed
Fiera Capital (Canada)
1116
Fiera Capital (Canada)
Quebec, Canada
– – -7,081 Closed
FBC
1117
Fairfield, Bush & Co
Connecticut
– – -7,000 Closed
AAM
1118
Azzad Asset Management
Virginia
– – -6,411 Closed
MSE
1119
MUFG Securities EMEA
United Kingdom
– – -6,395 Closed
BSCM
1120
Berry Street Capital Management
United Kingdom
– – -6,250 Closed
SGI
1121
Summit Global Investments
Utah
– – -5,950 Closed
SCM
1122
Silverarc Capital Management
Massachusetts
– – -5,000 Closed
AIM
1123
ARGA Investment Management
Connecticut
– – -4,455 Closed
LAM
1124
L2 Asset Management
Massachusetts
– – -4,294 Closed
BBI
1125
Baxter Bros Inc
Connecticut
– – -4,170 Closed
43 44
45
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