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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 %
CFO
526
Callan Family Office
Pennsylvania
$308K +$308K +2,454 New
AFG
527
Allegheny Financial Group
Pennsylvania
$304K – – –
OIM
528
Oracle Investment Management
Connecticut
$303K – – –
MS
529
Maven Securities
Jersey
$302K +$302K +2,404 New
SAM
530
Sectoral Asset Management
Quebec, Canada
$298K -$60.3K -480 -17%
JSSH
531
J. Safra Sarasin Holding
$298K -$959K -7,635 -76%
FHA
532
Flagship Harbor Advisors
Massachusetts
$294K -$12.8K -102 -4%
WPC
533
Wedmont Private Capital
Pennsylvania
$291K +$10.8K +81 +4%
Fayez Sarofim & Co
534
Fayez Sarofim & Co
Texas
$289K – – –
IAN
535
Integrated Advisors Network
Texas
$289K +$14.8K +118 +5%
OC
536
Oppenheimer & Co
New York
$284K -$254K -2,026 -47%
PTC
537
Philadelphia Trust Company
Pennsylvania
$283K – – –
SC
538
Syon Capital
California
$283K -$99.7K -794 -26%
RIA
539
Richwood Investment Advisors
Ohio
$282K -$67.2K -535 -19%
HCA
540
Harbor Capital Advisors
Illinois
$281K -$1.51K -12 -0.5%
KAS
541
Kestra Advisory Services
Texas
$280K +$39.4K +314 +16%
TCOT
542
Trust Company of Toledo
Ohio
$279K -$4.9K -39 -2%
AF
543
Allworth Financial
California
$274K +$146K +1,162 +114%
NA
544
Navellier & Associates
Nevada
$272K – – –
CIA
545
Capital Investment Advisors
Georgia
$272K +$13.9K +111 +5%
EWM
546
Evercore Wealth Management
New York
$269K – – –
GVAG
547
Great Valley Advisor Group
Delaware
$261K -$153K -1,215 -37%
PWM
548
Proathlete Wealth Management
Florida
$260K +$251 +2 +0.1%
HNB
549
Huntington National Bank
Ohio
$257K -$48.1K -383 -16%
PCS
550
Personal CFO Solutions
New Jersey
$253K -$1.26K -10 -0.5%
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