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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 %
Swedbank
76
Swedbank
Sweden
$26.8M -$543K -4,320 -2%
PAI
77
Palo Alto Investors
California
$25.8M +$105K +836 +0.4%
LGM
78
Logos Global Management
California
$25.1M +$25.1M +200,000 New
Acadian Asset Management
79
Acadian Asset Management
Massachusetts
$25M +$22.8M +181,905 +1,036%
Rafferty Asset Management
80
Rafferty Asset Management
New York
$22.7M -$42.1K -335 -0.2%
KK
81
KLP Kapitalforvaltning
Norway
$20.9M +$1.32M +10,500 +7%
Wells Fargo
82
Wells Fargo
California
$20.8M +$1.44M +11,477 +7%
Marshall Wace
83
Marshall Wace
United Kingdom
$20.8M +$20.1M +160,055 +2,713%
BNP Paribas Asset Management
84
BNP Paribas Asset Management
France
$20.6M +$1.39M +11,037 +7%
GAM
85
Gotham Asset Management
New York
$20.5M +$8.07M +64,261 +65%
CS
86
Candriam SCA
Luxembourg
$20.5M -$2.95M -23,465 -13%
Principal Financial Group
87
Principal Financial Group
Iowa
$20.1M -$637K -5,075 -3%
Aberdeen Group
88
Aberdeen Group
United Kingdom
$19.7M +$1.25M +9,942 +7%
SCM
89
Suvretta Capital Management
New York
$19.1M +$3.91M +31,154 +26%
Universal-Beteiligungs- und Servicegesellschaft
90
Universal-Beteiligungs- und Servicegesellschaft
Germany
$18.7M -$1.05M -8,333 -5%
DZ Bank
91
DZ Bank
Germany
$18.5M +$1.83M +14,591 +11%
National Bank of Canada
92
National Bank of Canada
Quebec, Canada
$18M -$7.32M -58,321 -29%
TD Asset Management
93
TD Asset Management
Ontario, Canada
$18M -$17.8M -141,349 -50%
New York State Common Retirement Fund
94
New York State Common Retirement Fund
New York
$17.6M +$1.14M +9,099 +7%
Mirae Asset Global ETFs Holdings
95
Mirae Asset Global ETFs Holdings
Hong Kong
$17.6M -$598K -4,761 -3%
State Board of Administration of Florida Retirement System
96
State Board of Administration of Florida Retirement System
Florida
$16.9M +$163K +1,300 +1%
Canada Life
97
Canada Life
Manitoba, Canada
$16.5M +$682K +5,426 +4%
ECM
98
ExodusPoint Capital Management
New York
$16.3M +$15.1M +120,009 +1,266%
Ameriprise
99
Ameriprise
Minnesota
$15.8M +$2.95M +23,505 +23%
Nordea Investment Management
100
Nordea Investment Management
Sweden
$15.8M +$855K +6,811 +6%
2 3
4
5 6