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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
Norges Bank
2
Norges Bank
Norway
$284M
3
Alyeska Investment Group
3
Alyeska Investment Group
Illinois
$63.9M
4
Arrowstreet Capital
4
Arrowstreet Capital
Massachusetts
$78.4M
5
Fidelity Investments
5
Fidelity Investments
Massachusetts
$210M

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 %
PAM
651
Paradigm Asset Management
New York
$57.1K 455 – –
RFS
652
Richardson Financial Services
Massachusetts
$56.8K 437 – –
LC
653
Lavaca Capital
Texas
$56.1K 447 +162 +57%
MSE
654
MUFG Securities EMEA
United Kingdom
$54.1K 431 +431 New
KFI
655
Key Financial Inc
Pennsylvania
$51K 406 – –
BG
656
Bellevue Group
Switzerland
$50.5K 402 – –
CFO
657
CVA Family Office
Colorado
$49.4K 393 +162 +70%
OL
658
OneFund LLC
Florida
$47K 373 +373 New
ZBNA
659
Zions Bancorporation, National Association
Utah
$46.7K 372 +161 +76%
AAG
660
Armstrong Advisory Group
Massachusetts
$44.7K 356 – –
CA
661
CoreCap Advisors
Michigan
$43.8K 349 -3 -0.9%
FWM
662
FSA Wealth Management
Massachusetts
$43.2K 344 – –
TPCW
663
TD Private Client Wealth
New York
$42.4K 338 +326 +2,717%
OIA
664
Optimum Investment Advisors
Illinois
$42.1K 335 – –
AAP
665
Arax Advisory Partners
Colorado
$41.8K 333 +118 +55%
MA
666
MCF Advisors
Kentucky
$40.7K 324 – –
NFSG
667
Newbridge Financial Services Group
Florida
$37.7K 300 – –
CAM
668
Costello Asset Management
Pennsylvania
$37.7K 300 – –
HFS
669
Hopwood Financial Services
Virginia
$37.7K 300 – –
FGC
670
Financial Gravity Companies
Texas
$37K 295 +295 New
NB
671
NBT Bank
New York
$35.7K 284 +35 +14%
SWP
672
Strategic Wealth Partners
Ohio
$35.2K 280 +280 New
IUHSA
673
Itau Unibanco Holding S.A.
Brazil
$34.3K 273 -3 -1%
GSWM
674
Golden State Wealth Management
California
$33.3K 265 – –
GKIM
675
GW&K Investment Management
Massachusetts
$33K 260 +168 +183%
25 26
27
28 29