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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 %
Mirae Asset Global Investments
151
Mirae Asset Global Investments
South Korea
$7.62M +$1.04M +7,531 +16%
Toronto Dominion Bank
152
Toronto Dominion Bank
Ontario, Canada
$7.61M -$2.33M -17,028 -23%
BS
153
Banco Santander
Spain
$7.52M +$983K +7,182 +15%
Nomura Asset Management
154
Nomura Asset Management
Japan
$7.36M +$642K +4,694 +10%
OCBCO
155
Oversea-Chinese Banking Corp (OCBC)
Singapore
$7.33M +$1.24M +9,014 +20%
GC
156
Guggenheim Capital
Illinois
$7.27M -$1.05M -7,651 -13%
Envestnet Asset Management
157
Envestnet Asset Management
Illinois
$7.16M +$811K +5,926 +13%
O
158
Ossiam
France
$7.14M +$249K +1,818 +4%
EAM
159
Erste Asset Management
Austria
$7.05M -$1.16M -8,360 -14%
SCP
160
Seizert Capital Partners
Michigan
$6.9M +$1.48M +10,786 +27%
TAF
161
Tredje AP-fonden
Sweden
$6.84M +$6.84M +50,000 New
JFG
162
Jefferies Financial Group
New York
$6.84M -$4.63M -33,853 -40%
PD
163
Point72 (DIFC)
United Arab Emirates
$6.82M +$6.81M +49,778 +70,110%
RPAM
164
Rhenman & Partners Asset Management
Sweden
$6.77M -$10.2M -74,200 -60%
FMI
165
Factory Mutual Insurance
Massachusetts
$6.73M – – –
State of New Jersey Common Pension Fund D
166
State of New Jersey Common Pension Fund D
New Jersey
$6.62M -$518K -3,783 -7%
LF
167
Lansforsakringar Fondforvaltning
Sweden
$6.59M -$17.8K -130 -0.3%
CIBC Asset Management
168
CIBC Asset Management
Ontario, Canada
$6.47M +$62.1K +454 +1%
NAM
169
Nissay Asset Management
Japan
$6.46M +$455K +3,325 +8%
RAM
170
Resona Asset Management
Japan
$6.4M +$288K +2,104 +5%
Skandinaviska Enskilda Banken (SEB)
171
Skandinaviska Enskilda Banken (SEB)
Sweden
$6.39M +$504K +3,684 +9%
Mackenzie Financial
172
Mackenzie Financial
Ontario, Canada
$6.39M +$1.76M +12,838 +38%
AAF
173
Andra AP-fonden
Sweden
$6.32M +$1.71M +12,500 +37%
Ohio Public Employees Retirement System (OPERS)
174
Ohio Public Employees Retirement System (OPERS)
Ohio
$6.14M -$710K -5,188 -10%
Assenagon Asset Management
175
Assenagon Asset Management
Luxembourg
$6.13M +$183K +1,336 +3%
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