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Biogen
BIIB

Overview Fund Activity

846 hedge funds and large institutions have $16.1B invested in Biogen in 2025 Q2 according to their latest regulatory filings, with 94 funds opening new positions, 336 increasing their positions, 257 reducing their positions, and 99 closing their positions.

Holders
846
Holders Change
-22
Holders Change %
-2.53%
% of All Funds
11.36%
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
336
Reduced
257
Closed
99
Calls
$292M
Puts
$203M
Net Calls
+$88.9M
Net Calls Change
+$365M

Top Buyers

1
Point72 Asset Management
1
Point72 Asset Management
Connecticut
$481M
2
Norges Bank
2
Norges Bank
Norway
$284M
3
Alyeska Investment Group
3
Alyeska Investment Group
Illinois
$63.9M
4
Arrowstreet Capital
4
Arrowstreet Capital
Massachusetts
$78.4M
5
Fidelity Investments
5
Fidelity Investments
Massachusetts
$210M

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 Market Value Shares Shares
Change 		Shares
Change %
Vanguard Group
1
Vanguard Group
Pennsylvania
$2.17B 17,290,651 +257,812 +2%
Primecap Management
2
Primecap Management
California
$1.98B 15,802,122 -141,137 -0.9%
BlackRock
3
BlackRock
New York
$1.7B 13,555,466 -1,655,570 -11%
State Street
4
State Street
Massachusetts
$938M 7,468,807 +71,897 +1%
Wellington Management Group
5
Wellington Management Group
Massachusetts
$603M 4,798,420 +125,983 +3%
Geode Capital Management
6
Geode Capital Management
Massachusetts
$490M 3,918,150 +71,286 +2%
Point72 Asset Management
7
Point72 Asset Management
Connecticut
$481M 3,831,727 +3,424,470 +841%
Invesco
8
Invesco
Georgia
$291M 2,320,126 +55,119 +2%
Norges Bank
9
Norges Bank
Norway
$284M 2,264,177 +2,264,177 New
Morgan Stanley
10
Morgan Stanley
New York
$246M 1,956,210 -34,458 -2%
UBS AM
11
UBS AM
Illinois
$219M 1,743,209 +232,823 +15%
Fidelity Investments
12
Fidelity Investments
Massachusetts
$210M 1,674,220 +365,392 +28%
Northern Trust
13
Northern Trust
Illinois
$193M 1,536,980 +35,893 +2%
Legal & General Group
14
Legal & General Group
United Kingdom
$182M 1,446,816 +161,789 +13%
T. Rowe Price Investment Management
15
T. Rowe Price Investment Management
Maryland
$175M 1,394,476 -1,265,814 -48%
D.E. Shaw & Co
16
D.E. Shaw & Co
New York
$172M 1,366,207 -219,365 -14%
AQR Capital Management
17
AQR Capital Management
Connecticut
$171M 1,364,805 -4,037 -0.3%
Pacer Advisors
18
Pacer Advisors
Pennsylvania
$166M 1,319,991 -32,569 -2%
Deutsche Bank
19
Deutsche Bank
Germany
$141M 1,123,178 +182,126 +19%
Charles Schwab
20
Charles Schwab
California
$135M 1,075,757 +56,538 +6%
VanEck Associates
21
VanEck Associates
New York
$135M 1,074,811 +1,189 +0.1%
Bank of America
22
Bank of America
North Carolina
$134M 1,063,391 +333,535 +46%
Renaissance Technologies
23
Renaissance Technologies
New York
$131M 1,045,106 +240,600 +30%
JPMorgan Chase & Co
24
JPMorgan Chase & Co
New York
$126M 1,002,502 -461,218 -32%
Dimensional Fund Advisors
25
Dimensional Fund Advisors
Texas
$117M 928,496 -58,223 -6%
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