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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 %
PCM
451
Polymer Capital Management
New York
$472K -$15.1K -120 -3%
AFCM
452
Applied Finance Capital Management
Puerto Rico
$465K +$465K +3,703 New
IWC
453
Integrated Wealth Concepts
Massachusetts
$463K +$202K +1,609 +77%
WBC
454
Westpac Banking Corp
Australia
$457K – – –
SDIC
455
South Dakota Investment Council
South Dakota
$454K – – –
GI
456
GAMMA Investing
California
$450K +$217K +1,725 +93%
SFI
457
Siemens Fonds Invest
Germany
$445K +$41.7K +332 +10%
Bessemer Group
458
Bessemer Group
New Jersey
$444K +$63.5K +507 +17%
SO
459
STRS Ohio
Ohio
$439K -$3.83M -30,508 -90%
Cambridge Investment Research Advisors
460
Cambridge Investment Research Advisors
Iowa
$431K -$49.7K -396 -10%
SW
461
Simplicity Wealth
New Jersey
$430K +$430K +3,424 New
SB
462
SIG Brokerage
New York
$424K -$106K -846 -20%
SOW
463
State of Wyoming
Wyoming
$424K +$103K +818 +32%
VIA
464
Virtus Investment Advisers
Connecticut
$422K +$132K +1,048 +45%
SWA
465
Sax Wealth Advisors
New Jersey
$413K +$135K +1,078 +49%
VI
466
Vestcor Inc
New Brunswick, Canada
$408K +$88.4K +703 +28%
MSA
467
MUFG Securities Americas
New York
$408K +$82.4K +656 +25%
CCM
468
Coldstream Capital Management
Washington
$408K -$14.6K -116 -3%
BCP
469
Blackhawk Capital Partners
Wisconsin
$403K +$53.1K +423 +15%
PAS
470
Park Avenue Securities
New York
$402K +$17.2K +137 +4%
RFN
471
RDA Financial Network
Iowa
$402K – – –
EA
472
Emerald Advisers
Pennsylvania
$400K +$400K +3,181 New
VT
473
Vise Technologies
New York
$398K +$398K +3,170 New
FIM
474
Freedom Investment Management
Connecticut
$395K +$35.3K +281 +10%
PAM
475
Panagora Asset Management
Massachusetts
$393K -$23.5K -187 -6%
17 18
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