1,005 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, 394 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: $ → $

26% less repeat investments, than reductions

Existing positions increased: 293 | Existing positions reduced: 394

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
1,005
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
851
$43K
852
$42K
853
$40K
854
$40K
855
$40K
856
$39.6K
857
$39K
858
$39K
859
$39K
860
$39K
861
$38K
862
$36K
863
$35K
864
$35K
865
$34.3K
866
$33K
867
$33K
868
$33K
869
$32K
870
$31K
871
$31K
872
$31K
873
$30K
874
$28K
875
$28K