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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 %
KFC
501
Klingenstein Fields & Co
New York
$343K – – –
AG
502
Ascent Group
Virginia
$341K +$341K +2,714 New
HWM
503
HB Wealth Management
Georgia
$341K +$38.1K +303 +13%
STA
504
Summit Trail Advisors
New York
$337K +$337K +2,687 New
QL
505
Quarry LP
New York
$337K -$135K -1,074 -29%
NA
506
NewEdge Advisors
Louisiana
$336K +$39.7K +316 +13%
SL
507
Summitry LLC
California
$333K +$333K +2,651 New
APM
508
Advanced Portfolio Management
New York
$332K – – –
EGA
509
Eagle Global Advisors
Texas
$330K – – –
EBT
510
Enterprise Bank & Trust
Massachusetts
$329K -$5.65K -45 -2%
WIM
511
Westside Investment Management
California
$329K -$10.2K -80 -3%
DS
512
DRW Securities
Illinois
$321K +$321K +2,578 New
ACM
513
Aljian Capital Management
Nevada
$319K – – –
AA
514
ALPS Advisors
Colorado
$318K +$3.89K +31 +1%
ETC
515
Exchange Traded Concepts
Oklahoma
$316K +$14.2K +113 +5%
SPA
516
Sherbrooke Park Advisers
New York
$315K +$315K +2,512 New
TE
517
Tema ETFs
New York
$315K +$1.26K +10 +0.4%
LWAM
518
Legacy Wealth Asset Management
Minnesota
$315K +$11.4K +91 +4%
PP
519
Prudential plc
United Kingdom
$315K – – –
NSEDCP
520
NJ State Employees Deferred Compensation Plan
New Jersey
$314K – – –
DI
521
DKRT Investments
$314K +$314K +2,500 New
AAS
522
Avantax Advisory Services
Texas
$314K +$314K +2,498 New
MF
523
Magnetar Financial
Illinois
$312K -$657K -5,235 -68%
TA
524
TFB Advisors
Kansas
$310K +$4.02K +32 +1%
CPIG
525
Chicago Partners Investment Group
Illinois
$309K +$309K +2,358 New
19 20
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