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Biogen
BIIB

Overview Fund Activity

850 hedge funds and large institutions have $16.2B invested in Biogen in 2025 Q2 according to their latest regulatory filings, with 94 funds opening new positions, 337 increasing their positions, 260 reducing their positions, and 99 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
850
Holders Change
-18
Holders Change %
-2.07%
% of All Funds
11.4%
Holding in Top 10
5
Holding in Top 10 Change
+3
Holding in Top 10 Change %
+150%
% of All Funds
0.07%
New
94
Increased
337
Reduced
260
Closed
99
Calls
$381M
Puts
$333M
Net Calls
+$47.6M
Net Calls Change
+$323M

Top Buyers

1
Point72 Asset Management
1
Point72 Asset Management
Connecticut
$481M
2
Alyeska Investment Group
2
Alyeska Investment Group
Illinois
$63.9M
3
Arrowstreet Capital
3
Arrowstreet Capital
Massachusetts
$78.4M
4
Fidelity Investments
4
Fidelity Investments
Massachusetts
$210M
5
A
5
AustralianSuper
Australia
$92.9M

Top Sellers

1
BlackRock
1
BlackRock
New York
$1.7B
2
T. Rowe Price Investment Management
2
T. Rowe Price Investment Management
Maryland
$175M
3
Amundi
3
Amundi
France
$77.2M
4
SG Americas Securities
4
SG Americas Securities
New York
$2.82M
5
Qube Research & Technologies (QRT)
5
Qube Research & Technologies (QRT)
United Kingdom
$93.4M
Name Holding Trade Value Shares
Change 		Shares
Change %
Victory Capital Management
101
Victory Capital Management
Texas
$15.5M -$166K -1,324 -1%
JLBC
102
J.L. Bainbridge & Co
Florida
$15.4M -$273K -2,177 -2%
Nomura Holdings
103
Nomura Holdings
Japan
$15.2M -$11.7M -92,955 -43%
Federated Hermes
104
Federated Hermes
Pennsylvania
$15.1M +$2.14M +17,069 +17%
Capital Fund Management (CFM)
105
Capital Fund Management (CFM)
France
$14.8M -$12M -95,321 -45%
LBA
106
Letko, Brosseau & Associates
Quebec, Canada
$14.8M +$257K +2,045 +2%
BBVA
107
Banco Bilbao Vizcaya Argentaria
Spain
$14.4M -$1.84M -14,641 -11%
IC
108
IEQ Capital
California
$14.1M +$5.34M +42,522 +61%
FGP
109
Freestone Grove Partners
California
$13.9M +$13.9M +111,004 New
New York State Teachers Retirement System (NYSTRS)
110
New York State Teachers Retirement System (NYSTRS)
New York
$13.9M +$373K +2,973 +3%
DekaBank Deutsche Girozentrale
111
DekaBank Deutsche Girozentrale
Germany
$13.7M -$60K -477 -0.4%
Aviva
112
Aviva
United Kingdom
$13.6M +$872K +6,945 +7%
Axa
113
Axa
France
$13.6M -$5.7M -45,397 -29%
Manulife (Manufacturers Life Insurance)
114
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$13.5M -$1.44M -11,503 -10%
IMRF
115
Illinois Municipal Retirement Fund
Illinois
$13.4M +$5.37M +42,783 +67%
Bank of Montreal
116
Bank of Montreal
Ontario, Canada
$13M -$3.72M -29,654 -22%
Handelsbanken Fonder
117
Handelsbanken Fonder
Sweden
$12.3M +$2.18M +17,347 +22%
PE
118
Point72 Europe
United Kingdom
$12M +$1.66M +13,204 +16%
WP
119
Woodline Partners
California
$12M -$3.72M -29,602 -24%
Group One Trading
120
Group One Trading
Illinois
$11.3M +$9.78M +77,841 +629%
CAM
121
Cresset Asset Management
Illinois
$11M +$10.8M +85,690 +4,372%
APG Asset Management
122
APG Asset Management
Netherlands
$10.5M +$199K +1,863 +2%
SFM
123
Sphera Funds Management
Israel
$10.4M +$7.54M +60,000 +264%
Mackenzie Financial
124
Mackenzie Financial
Ontario, Canada
$10.3M +$4.48M +35,652 +76%
American Century Companies
125
American Century Companies
Missouri
$10.2M +$2.61M +20,778 +34%
3 4
5
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