BIIB icon

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.

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 Market Value Shares Shares
Change 		Shares
Change %
PAI
76
Palo Alto Investors
California
$28M 204,923 +14,775 +8%
National Bank of Canada
77
National Bank of Canada
Quebec, Canada
$27.6M 201,533 +23,644 +13%
Hudson Bay Capital Management
78
Hudson Bay Capital Management
Connecticut
$27.4M 200,520 -40,488 -17%
Zurich Cantonal Bank
79
Zurich Cantonal Bank
Switzerland
$25.7M 187,803 +43,651 +30%
CS
80
Candriam SCA
Luxembourg
$25.6M 186,780 -15,184 -8%
Retirement Systems of Alabama
81
Retirement Systems of Alabama
Alabama
$25.1M 183,551 -1,832 -1%
Rafferty Asset Management
82
Rafferty Asset Management
New York
$24.7M 180,775 -8,745 -5%
HF
83
HRT Financial
New York
$24.4M 178,342 +178,342 New
Principal Financial Group
84
Principal Financial Group
Iowa
$22.6M 164,836 +136 +0.1%
Universal-Beteiligungs- und Servicegesellschaft
85
Universal-Beteiligungs- und Servicegesellschaft
Germany
$21.5M 157,461 +4,594 +3%
KK
86
KLP Kapitalforvaltning
Norway
$21.4M 156,077 +63,700 +69%
Wells Fargo
87
Wells Fargo
California
$21.1M 154,485 +43,442 +39%
Axa
88
Axa
France
$21.1M 153,969 -7,667 -5%
Nisa Investment Advisors
89
Nisa Investment Advisors
Missouri
$21M 153,217 -46,037 -23%
BNP Paribas Asset Management
90
BNP Paribas Asset Management
France
$20.9M 152,593 -25,875 -14%
Aberdeen Group
91
Aberdeen Group
United Kingdom
$20M 146,813 -396,597 -73%
Mirae Asset Global ETFs Holdings
92
Mirae Asset Global ETFs Holdings
Hong Kong
$19.8M 144,593 +27,353 +23%
CSS
93
Cubist Systematic Strategies
Connecticut
$19.3M 140,881 +25,938 +23%
Voloridge Investment Management
94
Voloridge Investment Management
Florida
$18.4M 134,489 -17,189 -11%
State Board of Administration of Florida Retirement System
95
State Board of Administration of Florida Retirement System
Florida
$18.3M 133,547 – –
Bank of Montreal
96
Bank of Montreal
Ontario, Canada
$18.2M 132,968 -78,368 -37%
DZ Bank
97
DZ Bank
Germany
$18.2M 132,891 +60,073 +82%
New York State Common Retirement Fund
98
New York State Common Retirement Fund
New York
$17.9M 131,146 +20,130 +18%
BBVA
99
Banco Bilbao Vizcaya Argentaria
Spain
$17.7M 129,513 +2,231 +2%
Canada Life
100
Canada Life
Manitoba, Canada
$17.2M 125,507 -1,124 -0.9%
2 3
4
5 6