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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 %
Mitsubishi UFJ Trust & Banking
126
Mitsubishi UFJ Trust & Banking
Japan
$10.2M +$498K +3,962 +5%
TI
127
Trexquant Investment
Connecticut
$10.2M +$4.56M +36,334 +82%
State of Wisconsin Investment Board
128
State of Wisconsin Investment Board
Wisconsin
$9.89M -$1.23M -9,808 -11%
Chevy Chase Trust
129
Chevy Chase Trust
Maryland
$9.76M +$78.6K +626 +0.8%
BPC
130
Banque Pictet & Cie
Switzerland
$9.05M +$471K +3,751 +5%
VOYA Investment Management
131
VOYA Investment Management
Georgia
$8.82M +$18.6K +148 +0.2%
LPL Financial
132
LPL Financial
California
$8.82M +$3.25M +25,873 +58%
Caisse de Depot et Placement du Quebec (CDPQ)
133
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
$8.74M -$1.55M -12,323 -15%
Treasurer of the State of North Carolina
134
Treasurer of the State of North Carolina
North Carolina
$8.57M +$197K +1,572 +2%
Royal London Asset Management
135
Royal London Asset Management
United Kingdom
$8.51M -$313K -2,494 -4%
Skandinaviska Enskilda Banken (SEB)
136
Skandinaviska Enskilda Banken (SEB)
Sweden
$8.45M +$2.58M +20,500 +44%
Toronto Dominion Bank
137
Toronto Dominion Bank
Ontario, Canada
$8.4M +$1.42M +11,274 +20%
Zurich Cantonal Bank
138
Zurich Cantonal Bank
Switzerland
$8.33M -$15.3M -121,483 -65%
SCP
139
Seizert Capital Partners
Michigan
$8.32M +$1.98M +15,788 +31%
SSA
140
Schonfeld Strategic Advisors
New York
$8.04M +$8.04M +63,989 New
Asset Management One
141
Asset Management One
Japan
$7.89M +$175K +1,390 +2%
Korea Investment Corp
142
Korea Investment Corp
South Korea
$7.72M -$615K -4,900 -7%
HI
143
Horizon Investments
North Carolina
$7.69M +$7.42M +59,108 +2,739%
Mirae Asset Global Investments
144
Mirae Asset Global Investments
South Korea
$7.66M +$746K +5,939 +11%
GC
145
Guggenheim Capital
Illinois
$7.51M +$842K +6,701 +13%
EDRH
146
Edmond de Rothschild Holding
Switzerland
$7.5M -$49K -390 -0.6%
ATN
147
AMF Tjänstepension
Sweden
$7.42M – – –
VIM
148
Vinva Investment Management
Australia
$7.42M +$7.42M +58,862 New
Lazard Asset Management
149
Lazard Asset Management
New York
$7.3M -$55.4K -441 -0.8%
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
150
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$7.06M -$994K -7,912 -12%
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6
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