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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
Point72 Asset Management
Connecticut
$481M
2
Alyeska Investment Group
Alyeska Investment Group
Illinois
$63.9M
3
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
$78.4M
4
Fidelity Investments
Fidelity Investments
Massachusetts
$210M
5
A
AustralianSuper
Australia
$92.9M

Top Sellers

1
BlackRock
BlackRock
New York
$1.7B
2
T. Rowe Price Investment Management
T. Rowe Price Investment Management
Maryland
$175M
3
Amundi
Amundi
France
$77.2M
4
SG Americas Securities
SG Americas Securities
New York
$2.82M
5
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT)
United Kingdom
$93.4M
Name Holding Trade Value Shares
Change 		Shares
Change %
Janney Montgomery Scott
251
Janney Montgomery Scott
Pennsylvania
$2.4M +$145K +1,158 +6%
SOADOR
252
State of Alaska Department of Revenue
Alaska
$2.39M -$82.9K -660 -3%
BCV
253
Banque Cantonale Vaudoise
Switzerland
$2.32M +$1.09M +8,648 +88%
UM
254
UniSuper Management
Australia
$2.31M +$93.2K +742 +4%
LSERS
255
Louisiana State Employees Retirement System
Louisiana
$2.31M -$25.1K -200 -1%
Kovitz Investment Group Partners
256
Kovitz Investment Group Partners
Illinois
$2.3M +$516K +4,105 +29%
Janus Henderson Group
257
Janus Henderson Group
United Kingdom
$2.29M -$322K -2,568 -12%
Thrivent Financial for Lutherans
258
Thrivent Financial for Lutherans
Minnesota
$2.29M +$445K +3,544 +24%
LWL
259
Leo Wealth LLC
Texas
$2.28M +$36.2K +288 +2%
SMDAM
260
Sumitomo Mitsui DS Asset Management
Japan
$2.27M -$6.91K -55 -0.3%
TS
261
Triglav Skladi
Slovenia
$2.26M – – –
ITC
262
Inspire Trust Company
Nevada
$2.26M +$465K +3,700 +26%
HC
263
Hourglass Capital
Texas
$2.26M +$2.26M +17,970 New
EMPI
264
Elo Mutual Pension Insurance
Finland
$2.25M +$53.5K +426 +2%
SCM
265
Shelton Capital Management
Colorado
$2.18M -$445K -3,541 -17%
PEAK6
266
PEAK6
Illinois
$2.17M -$1.67M -13,336 -44%
US Bancorp
267
US Bancorp
Minnesota
$2.15M -$1.11M -8,837 -34%
MOACM
268
Mutual of America Capital Management
New York
$2.11M -$28.1K -224 -1%
Optiver Holding
269
Optiver Holding
Netherlands
$2.08M +$2.08M +16,550 New
LOAMS
270
Lombard Odier Asset Management (Switzerland)
Switzerland
$2.06M -$580K -4,622 -22%
Bank of Nova Scotia
271
Bank of Nova Scotia
Ontario, Canada
$2.05M +$2.89K +23 +0.1%
PD
272
Point72 (DIFC)
United Arab Emirates
$2.05M -$4.21M -33,548 -67%
IGAM
273
iA Global Asset Management
Quebec, Canada
$2.04M -$266K -2,118 -12%
EP
274
Edgestream Partners
New Jersey
$2.03M -$86.2K -686 -4%
SF
275
Synovus Financial
Georgia
$2.01M -$247K -1,963 -11%
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