1,004 hedge funds and large institutions have $29.5B invested in Biogen in 2021 Q4 according to their latest regulatory filings, with 144 funds opening new positions, 293 increasing their positions, 393 reducing their positions, and 153 closing their positions.

New
Increased
Maintained
Reduced
Closed

more ownership

Funds ownership:

less first-time investments, than exits

New positions opened: | Existing positions closed:

less funds holding

Funds holding:

less capital invested

Capital invested by funds: $ → $

25% less repeat investments, than reductions

Existing positions increased: 293 | Existing positions reduced: 393

27% less funds holding in top 10

Funds holding in top 10: 1511 (-4)

28% less call options, than puts

Call options by funds: $1.1B | Put options by funds: $1.52B

Holders
1,004
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
11
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.1B
Puts
$1.52B
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
801
$121K
802
$121K
803
$117K
804
$116K
805
$113K
806
$113K
807
$112K
808
$111K
809
$110K
810
$108K
811
$106K
812
$106K
813
$103K
814
$98K
815
$97K
816
$96K
817
$95K
818
$93K
819
$93K
820
$92K
821
$88K
822
$84K
823
$81K
824
$80K
825
$78K