BIIB icon

Biogen
BIIB

Overview Fund Activity

868 hedge funds and large institutions have $17.4B invested in Biogen in 2025 Q1 according to their latest regulatory filings, with 127 funds opening new positions, 328 increasing their positions, 264 reducing their positions, and 105 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
868
Holders Change
+8
Holders Change %
+0.93%
% of All Funds
11.79%
Holding in Top 10
2
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-50%
% of All Funds
0.03%
New
127
Increased
328
Reduced
264
Closed
105
Calls
$345M
Puts
$621M
Net Calls
-$276M
Net Calls Change
-$229M

Top Buyers

1
AQR Capital Management
AQR Capital Management
Connecticut
$187M
2
Balyasny Asset Management
Balyasny Asset Management
Illinois
$108M
3
SG Americas Securities
SG Americas Securities
New York
$98.5M
4
Fidelity Investments
Fidelity Investments
Massachusetts
$179M
5
Point72 Asset Management
Point72 Asset Management
Connecticut
$55.7M

Top Sellers

1
Pacer Advisors
Pacer Advisors
Pennsylvania
$185M
2
BGC
Beutel, Goodman & Co
Ontario, Canada
$1K
3
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
$158M
4
JPMorgan Chase & Co
JPMorgan Chase & Co
New York
$200M
5
O
OrbiMed
New York
$0
Name Holding Trade Value Shares
Change 		Shares
Change %
PP
876
PDT Partners
New York
– -$6.03M -39,405 Closed
MAM
877
Martingale Asset Management
Massachusetts
– -$5.34M -34,922 Closed
AIMCA
878
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
– -$5.07M -33,180 Closed
DT
879
Diversified Trust
Tennessee
– -$3.51M -22,926 Closed
IG
880
ING Group
Netherlands
– -$3.39M -22,171 Closed
KHLMTHM
881
Kranot Hishtalmut Le Morim Tichoniim Havera Menahelet
Israel
– -$2.86M -18,715 Closed
CM
882
Caption Management
Oklahoma
– -$2.12M -13,875 Closed
Parallax Volatility Advisers
883
Parallax Volatility Advisers
California
– -$2.09M -13,690 Closed
GCM
884
Graham Capital Management
Connecticut
– -$2.04M -13,357 Closed
FFA
885
First Foundation Advisors
California
– -$1.74M -11,352 Closed
ECM
886
Eisler Capital Management
United Kingdom
– -$1.59M -10,611 Closed
CPCPP
887
Canada Post Corporation Pension Plan
Canada
– -$1.49M -9,718 Closed
QIM
888
Quantitative Investment Management
Virginia
– -$1.36M -8,918 Closed
SI
889
Symmetry Investments
Jersey
– -$1.23M -8,070 Closed
VMPIC
890
Varma Mutual Pension Insurance Co
Finland
– -$1.07M -7,000 Closed
WA
891
Win Advisors
Florida
– -$1.02M -6,686 Closed
SPA
892
Sherbrooke Park Advisers
New York
– -$683K -4,464 Closed
GM
893
GeoWealth Management
Illinois
– -$597K -3,903 Closed
PF
894
Phoenix Financial
Israel
– -$552K -3,608 Closed
T
895
TOBAM
France
– -$514K -3,358 Closed
FRA
896
Frank Rimerman Advisors
California
– -$510K -3,337 Closed
AO
897
Advisor OS
Illinois
– -$431K -2,819 Closed
AI
898
Atom Investors
Texas
– -$420K -2,745 Closed
CPIG
899
Chicago Partners Investment Group
Illinois
– -$369K -2,445 Closed
Envestnet Portfolio Solutions
900
Envestnet Portfolio Solutions
Illinois
– -$363K -2,374 Closed
34 35
36
37 38