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Biogen
BIIB

Overview Fund Activity

868 hedge funds and large institutions have $17.4B invested in Biogen in 2025 Q1 according to their latest regulatory filings, with 127 funds opening new positions, 328 increasing their positions, 264 reducing their positions, and 105 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
868
Holders Change
+8
Holders Change %
+0.93%
% of All Funds
11.79%
Holding in Top 10
2
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-50%
% of All Funds
0.03%
New
127
Increased
328
Reduced
264
Closed
105
Calls
$345M
Puts
$621M
Net Calls
-$276M
Net Calls Change
-$229M

Top Buyers

1
AQR Capital Management
1
AQR Capital Management
Connecticut
$187M
2
Balyasny Asset Management
2
Balyasny Asset Management
Illinois
$108M
3
SG Americas Securities
3
SG Americas Securities
New York
$98.5M
4
Fidelity Investments
4
Fidelity Investments
Massachusetts
$179M
5
Point72 Asset Management
5
Point72 Asset Management
Connecticut
$55.7M

Top Sellers

1
Pacer Advisors
1
Pacer Advisors
Pennsylvania
$185M
2
BGC
2
Beutel, Goodman & Co
Ontario, Canada
$1K
3
T. Rowe Price Associates
3
T. Rowe Price Associates
Maryland
$158M
4
JPMorgan Chase & Co
4
JPMorgan Chase & Co
New York
$200M
5
O
5
OrbiMed
New York
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
JF
126
Jump Financial
Illinois
$10M -$2.93M -21,425 -23%
MGP
127
M&G plc
United Kingdom
$9.96M +$531K +3,873 +6%
GT
128
Glenmede Trust
Pennsylvania
$9.79M -$2.39M -17,476 -20%
Adage Capital Partners
129
Adage Capital Partners
Massachusetts
$9.68M +$9.68M +70,767 New
Royal London Asset Management
130
Royal London Asset Management
United Kingdom
$9.61M +$723K +5,283 +8%
VOYA Investment Management
131
VOYA Investment Management
Georgia
$9.59M -$1.03M -7,512 -10%
Walleye Capital
132
Walleye Capital
New York
$9.57M +$8.19M +59,865 +596%
IC
133
IEQ Capital
California
$9.54M +$1.4M +10,195 +17%
BPC
134
Banque Pictet & Cie
Switzerland
$9.34M +$654K +4,780 +8%
Treasurer of the State of North Carolina
135
Treasurer of the State of North Carolina
North Carolina
$9.12M -$3.01M -22,017 -25%
Korea Investment Corp
136
Korea Investment Corp
South Korea
$9.09M +$862K +6,300 +10%
TC
137
TwinBeech Capital
New York
$8.79M +$8.79M +64,253 New
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
138
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$8.78M -$16.1M -117,709 -65%
IMRF
139
Illinois Municipal Retirement Fund
Illinois
$8.78M +$268K +1,957 +3%
Asset Management One
140
Asset Management One
Japan
$8.4M +$437K +3,194 +5%
Jacobs Levy Equity Management
141
Jacobs Levy Equity Management
New Jersey
$8.4M +$8.4M +61,393 New
Schroder Investment Management Group
142
Schroder Investment Management Group
United Kingdom
$8.35M +$2.45M +17,720 +42%
American Century Companies
143
American Century Companies
Missouri
$8.28M -$7.51M -54,899 -48%
EDRH
144
Edmond de Rothschild Holding
Switzerland
$8.22M – – –
GC
145
Grimes & Company
Massachusetts
$8.12M +$4.61M +33,721 +132%
ATN
146
AMF Tjänstepension
Sweden
$8.09M – – –
Macquarie Group
147
Macquarie Group
Australia
$8.09M +$841K +6,144 +12%
Lazard Asset Management
148
Lazard Asset Management
New York
$8.01M +$560K +4,096 +8%
WorldQuant Millennium Advisors
149
WorldQuant Millennium Advisors
New York
$7.8M -$55.3M -404,107 -88%
CAM
150
Centre Asset Management
New York
$7.79M +$734K +5,364 +10%
4 5
6
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