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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
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 Market Value Shares Shares
Change 		Shares
Change %
Mitsubishi UFJ Trust & Banking
126
Mitsubishi UFJ Trust & Banking
Japan
$10.2M 81,195 +3,962 +5%
TI
127
Trexquant Investment
Connecticut
$10.2M 80,822 +36,334 +82%
State of Wisconsin Investment Board
128
State of Wisconsin Investment Board
Wisconsin
$9.89M 78,768 -9,808 -11%
Chevy Chase Trust
129
Chevy Chase Trust
Maryland
$9.76M 77,741 +626 +0.8%
BPC
130
Banque Pictet & Cie
Switzerland
$9.05M 72,025 +3,751 +5%
VOYA Investment Management
131
VOYA Investment Management
Georgia
$8.82M 70,217 +148 +0.2%
LPL Financial
132
LPL Financial
California
$8.82M 70,194 +25,873 +58%
Caisse de Depot et Placement du Quebec (CDPQ)
133
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
$8.74M 69,577 -12,323 -15%
Treasurer of the State of North Carolina
134
Treasurer of the State of North Carolina
North Carolina
$8.57M 68,242 +1,572 +2%
Royal London Asset Management
135
Royal London Asset Management
United Kingdom
$8.51M 67,746 -2,494 -4%
Skandinaviska Enskilda Banken (SEB)
136
Skandinaviska Enskilda Banken (SEB)
Sweden
$8.45M 67,231 +20,500 +44%
Toronto Dominion Bank
137
Toronto Dominion Bank
Ontario, Canada
$8.4M 66,917 +11,274 +20%
Zurich Cantonal Bank
138
Zurich Cantonal Bank
Switzerland
$8.33M 66,320 -121,483 -65%
SCP
139
Seizert Capital Partners
Michigan
$8.32M 66,245 +15,788 +31%
SSA
140
Schonfeld Strategic Advisors
New York
$8.04M 63,989 +63,989 New
Asset Management One
141
Asset Management One
Japan
$7.89M 62,810 +1,390 +2%
Korea Investment Corp
142
Korea Investment Corp
South Korea
$7.72M 61,508 -4,900 -7%
HI
143
Horizon Investments
North Carolina
$7.69M 61,266 +59,108 +2,739%
Mirae Asset Global Investments
144
Mirae Asset Global Investments
South Korea
$7.66M 61,023 +5,939 +11%
GC
145
Guggenheim Capital
Illinois
$7.51M 59,827 +6,701 +13%
EDRH
146
Edmond de Rothschild Holding
Switzerland
$7.5M 59,680 -390 -0.6%
ATN
147
AMF Tjänstepension
Sweden
$7.42M 59,115 – –
VIM
148
Vinva Investment Management
Australia
$7.42M 58,862 +58,862 New
Lazard Asset Management
149
Lazard Asset Management
New York
$7.3M 58,131 -441 -0.8%
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
150
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$7.06M 56,238 -7,912 -12%
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6
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