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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.

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 %
Barclays
26
Barclays
United Kingdom
$126M +$10.9M +79,999 +10%
Two Sigma Investments
27
Two Sigma Investments
New York
$120M +$3.69M +26,994 +3%
Renaissance Technologies
28
Renaissance Technologies
New York
$110M -$53.1M -387,700 -33%
Balyasny Asset Management
29
Balyasny Asset Management
Illinois
$108M +$101M +740,390 +1,616%
Man Group
30
Man Group
United Kingdom
$105M +$10.8M +78,771 +11%
Bank of America
31
Bank of America
North Carolina
$99.9M +$42.9M +313,634 +75%
SG Americas Securities
32
SG Americas Securities
New York
$98.5M +$98.5M +719,793 New
Massachusetts Financial Services
33
Massachusetts Financial Services
Massachusetts
$96.9M -$3.28M -23,961 -3%
Two Sigma Advisers
34
Two Sigma Advisers
New York
$92.7M +$19.5M +142,800 +27%
Allianz Asset Management
35
Allianz Asset Management
Germany
$91.4M +$18M +131,813 +25%
First Trust Advisors
36
First Trust Advisors
Illinois
$90.5M +$20.5M +150,140 +29%
UBS Group
37
UBS Group
Switzerland
$88.4M -$55M -402,272 -38%
Goldman Sachs
38
Goldman Sachs
New York
$82.7M -$22.7M -165,623 -22%
Franklin Resources
39
Franklin Resources
California
$80.5M +$26.5M +193,726 +49%
Citadel Advisors
40
Citadel Advisors
Florida
$74.1M +$53.1M +388,104 +253%
HSBC Holdings
41
HSBC Holdings
United Kingdom
$66M +$5.87M +43,028 +10%
PCM
42
Patient Capital Management
Maryland
$62.3M +$5.7M +41,645 +10%
Robeco Institutional Asset Management
43
Robeco Institutional Asset Management
Netherlands
$62.1M +$6.19M +45,253 +11%
CCM
44
Causeway Capital Management
California
$59.3M +$20.8M +151,815 +54%
Millennium Management
45
Millennium Management
New York
$58M -$16.4M -119,847 -22%
Prudential Financial
46
Prudential Financial
New Jersey
$57.6M -$21.3M -155,627 -27%
Sumitomo Mitsui Trust Group
47
Sumitomo Mitsui Trust Group
Japan
$57.1M +$3.48M +25,464 +7%
Squarepoint
48
Squarepoint
New York
$56.9M +$6.06M +44,309 +12%
Swiss National Bank
49
Swiss National Bank
Switzerland
$56.2M -$68.4K -500 -0.1%
Point72 Asset Management
50
Point72 Asset Management
Connecticut
$55.7M +$55.7M +407,257 New
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