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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
Norges Bank
1
Norges Bank
Norway
$0
2
Pacer Advisors
2
Pacer Advisors
Pennsylvania
$185M
3
BGC
3
Beutel, Goodman & Co
Ontario, Canada
$1K
4
T. Rowe Price Associates
4
T. Rowe Price Associates
Maryland
$158M
5
JPMorgan Chase & Co
5
JPMorgan Chase & Co
New York
$200M
Name Market Value Shares Shares
Change 		Shares
Change %
Vanguard Group
1
Vanguard Group
Pennsylvania
$2.33B 17,032,839 +283,964 +2%
Primecap Management
2
Primecap Management
California
$2.18B 15,943,259 -102,950 -0.6%
BlackRock
3
BlackRock
New York
$2.08B 15,211,036 -262,674 -2%
State Street
4
State Street
Massachusetts
$1.01B 7,396,910 -1,338 -0%
Wellington Management Group
5
Wellington Management Group
Massachusetts
$639M 4,672,437 -258,286 -5%
Geode Capital Management
6
Geode Capital Management
Massachusetts
$525M 3,846,864 +151,388 +4%
T. Rowe Price Investment Management
7
T. Rowe Price Investment Management
Maryland
$364M 2,660,290 -439,496 -14%
Invesco
8
Invesco
Georgia
$310M 2,265,007 +136,200 +6%
Morgan Stanley
9
Morgan Stanley
New York
$272M 1,990,668 +208,312 +12%
D.E. Shaw & Co
10
D.E. Shaw & Co
New York
$217M 1,585,572 -24,327 -2%
UBS AM
11
UBS AM
Illinois
$207M 1,510,386 -23,427 -2%
Northern Trust
12
Northern Trust
Illinois
$205M 1,501,087 -49,043 -3%
JPMorgan Chase & Co
13
JPMorgan Chase & Co
New York
$200M 1,463,720 -632,594 -30%
AQR Capital Management
14
AQR Capital Management
Connecticut
$187M 1,368,842 +829,150 +154%
Pacer Advisors
15
Pacer Advisors
Pennsylvania
$185M 1,352,560 -1,314,971 -49%
Fidelity Investments
16
Fidelity Investments
Massachusetts
$179M 1,308,828 +551,258 +73%
Legal & General Group
17
Legal & General Group
United Kingdom
$176M 1,285,027 +55,020 +4%
Amundi
18
Amundi
France
$172M 1,315,947 +98,957 +8%
Qube Research & Technologies (QRT)
19
Qube Research & Technologies (QRT)
United Kingdom
$168M 1,226,709 +135,867 +12%
T. Rowe Price Associates
20
T. Rowe Price Associates
Maryland
$158M 1,151,192 -782,524 -40%
VanEck Associates
21
VanEck Associates
New York
$147M 1,073,622 +7,162 +0.7%
Charles Schwab
22
Charles Schwab
California
$139M 1,019,219 +47,956 +5%
Dimensional Fund Advisors
23
Dimensional Fund Advisors
Texas
$135M 986,719 -35,305 -3%
Bank of New York Mellon
24
Bank of New York Mellon
New York
$131M 953,811 -20,984 -2%
Deutsche Bank
25
Deutsche Bank
Germany
$129M 941,052 -228,518 -20%
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